WO2010087123A1 - Battery and method for manufacturing same - Google Patents

Battery and method for manufacturing same Download PDF

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Publication number
WO2010087123A1
WO2010087123A1 PCT/JP2010/000244 JP2010000244W WO2010087123A1 WO 2010087123 A1 WO2010087123 A1 WO 2010087123A1 JP 2010000244 W JP2010000244 W JP 2010000244W WO 2010087123 A1 WO2010087123 A1 WO 2010087123A1
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WO
WIPO (PCT)
Prior art keywords
strip
separator
electrode member
negative electrode
positive electrode
Prior art date
Application number
PCT/JP2010/000244
Other languages
French (fr)
Japanese (ja)
Inventor
多田光弘
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to JP2010548396A priority Critical patent/JPWO2010087123A1/en
Publication of WO2010087123A1 publication Critical patent/WO2010087123A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0436—Small-sized flat cells or batteries for portable equipment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
    • H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention generally relates to a battery and a method for manufacturing the same, and more specifically, a separator is interposed between a positive electrode plate and a negative electrode plate in a secondary battery such as a lithium ion secondary battery, a lithium secondary battery, or a polymer secondary battery.
  • a secondary battery such as a lithium ion secondary battery, a lithium secondary battery, or a polymer secondary battery.
  • the present invention relates to a stacked secondary battery that is stacked such that positive and negative electrode plates are alternately positioned in a state in which the positive electrode plate and the negative electrode plate are positioned, and a method for manufacturing the same.
  • a secondary battery is formed by folding a separator zigzag so that a positive electrode plate and a negative electrode plate are alternately positioned in a state where a strip-shaped separator is interposed between a sheet-like positive electrode plate and a negative electrode plate.
  • Patent Document 1 Japanese Patent No. 3794632 proposes a method for manufacturing a stacked secondary battery.
  • Patent Document 1 In the manufacturing method proposed in Patent Document 1, first, a negative electrode plate is placed on a strip-shaped separator by a negative electrode plate supply mechanism, and the separator is folded thereon. Next, a positive electrode plate is placed on the folded strip-shaped separator by a positive electrode plate supply mechanism, and the strip-shaped separator is folded thereon. These operations are repeated a predetermined number of times, and lamination is performed with a strip-shaped separator interposed between the negative electrode plate and the positive electrode plate.
  • a secondary battery is formed by winding a strip-shaped separator in one direction so that the positive and negative plates are alternately positioned with a strip-shaped separator interposed between the sheet-shaped positive and negative plates.
  • Patent Document 2 Japanese Patent No. 4035102 proposes a method for manufacturing a laminated secondary battery.
  • a positive electrode plate is disposed on one side of a strip-shaped separator and a negative plate is disposed simultaneously on the opposite side, and a strip-shaped separator is interposed between the positive electrode plate and the negative electrode plate. Clamp both ends of the positive and negative plates. Next, the clamp part is rotated halfway in one direction. By repeating this operation, a laminated secondary battery in which a strip separator is wound in one direction with a strip separator interposed between the positive electrode plate and the negative electrode plate is manufactured.
  • Patent Document 1 a positive electrode plate and a negative electrode plate are alternately placed one by one on a strip separator, and the positive electrode plate is placed between the positive electrode plate and the negative electrode plate.
  • the operation of bending the strip separator is intermittently performed. For this reason, it takes a relatively long time to place the required number of positive and negative electrode plates on the strip separator and complete the lamination of the positive and negative electrode plates. For this reason, there is a problem that productivity is extremely low.
  • an object of the present invention is to increase productivity in view of the problems of the prior art as described above, and a belt-like separator is interposed between the positive electrode member and the negative electrode member by a simple process. It is providing the battery which has a structure where a positive electrode member and a negative electrode member are positioned alternately in a state, and its manufacturing method.
  • a strip-shaped positive electrode member and a strip-shaped negative electrode member are disposed on the surface of the strip-shaped separator along the longitudinal direction of the strip-shaped separator, and one end of the strip-shaped separator is disposed.
  • a laminated battery in which a belt-like separator is interposed between a positive electrode member and a negative electrode member is formed by folding and winding the belt-like separator.
  • the strip-shaped positive electrode member and the strip-shaped negative electrode member are disposed on the surface of the strip-shaped separator, and the strip-shaped separator is bent and wound from one end of the strip-shaped separator.
  • a structure in which the positive electrode member and the negative electrode member are alternately positioned in a state where the strip separator is interposed between the positive electrode member and the negative electrode member can be realized by a simple process of winding around one end of the positive electrode member.
  • the positive electrode member and the negative electrode member are disposed only on one surface of the belt-shaped separator, and the belt-shaped separator is bent from one end of the belt-shaped separator and wound in one direction. It is preferable that a stacked battery in which a strip-shaped separator is interposed between the positive electrode member and the negative electrode member is formed.
  • the positive electrode member and the negative electrode member are arranged only on one surface of the belt-like separator, and the belt-like separator is bent and wound in one direction from one end of the belt-like separator.
  • the belt-shaped separator is interposed between the positive electrode member and the negative electrode member with a simpler process. A structure in which the positive electrode member and the negative electrode member are alternately positioned in the state can be realized.
  • a plurality of positive electrode members and negative electrode members are arranged in advance on the surface of the strip-shaped separator, and the strip-shaped separator is bent and wound from one end of the strip-shaped separator.
  • a plurality of sets of positive electrode members and negative electrode members are preliminarily arranged on the surface of the strip-shaped separator, and the strip-shaped separator is folded and wound from one end of the strip-shaped separator.
  • a method of alternately folding the strip separator after placing the positive electrode member or the negative electrode member one by one, or a method of half-rotating the strip separator after placing the positive electrode member and the negative electrode member one pair on both sides of the strip separator Compared to the above, the process can be simplified and the production time until the lamination of the positive and negative electrode members is completed by placing the necessary number of positive electrode members and negative electrode members on the strip separator can be shortened. .
  • the strip separator is continuously bent and wound from one end of the strip separator.
  • two positive electrode members and two negative electrode members are alternately arranged on the surface of a strip-shaped separator.
  • the positive electrode member and the negative electrode member can be formed in such a state that the belt-like separator is interposed between the positive electrode member and the negative electrode member only by bending the belt-like separator from one end of the belt-like separator and winding it in one direction.
  • a structure in which can be alternately positioned can be realized.
  • the positive electrode member and the negative electrode member are arranged on the surface of the strip separator along the longitudinal direction of the strip separator, and the strip separator is bent around one end of the strip separator.
  • a laminated battery in which a strip-shaped separator is interposed between the positive electrode member and the negative electrode member is formed.
  • the battery of the present invention has a structure capable of realizing a stacked battery in which a strip-shaped separator is interposed between the positive electrode member and the negative electrode member with high productivity, it can be manufactured at low cost.
  • the battery of the present invention since the battery of the present invention has a stable structure, there is little variation in characteristics as a product, and as a result, there is an advantage that reliability is high.
  • the positive electrode member and the negative electrode member are disposed only on one surface of the strip-shaped separator.
  • two positive electrode members and two negative electrode members are alternately arranged on the surface of the strip-shaped separator.
  • the stacked battery structure in which the positive electrode member and the negative electrode member are alternately positioned in a state where the strip separator is interposed between the positive electrode member and the negative electrode member can be obtained with high productivity, and Can be realized in a simple process.
  • a method of manufacturing a battery of the present invention for example, a lithium ion secondary battery, will be described with reference to FIGS.
  • the battery manufacturing apparatus 1000 includes a separator roll 100, a separator winding device 200, an adhesive application device 300, and a positive / negative electrode member suction moving device 400.
  • a long strip separator 10 is prepared in a state of being wound around a separator roll 100.
  • the auxiliary rolls 101 and 102, the separator support base 103, and the lifting base 104 are arranged in order so that the strip separator 10 can be fed out from the separator roll 100 and the fed strip separator 10 can be supported.
  • An adhesive application device 300 for applying an adhesive on the surface of the strip separator 10 is disposed on one side of the separator support base 103, and on the surface of the strip separator 10 coated with an adhesive on the other side.
  • the positive / negative electrode member suction / moving device 400 for placing the positive / negative electrode member on is arranged.
  • a plurality of strip-like positive electrode members 20 and negative electrode members 30 are previously placed on a positive / negative electrode member support base 401.
  • the two positive electrode members 20 and the two negative electrode members 30 are arranged on the positive and negative electrode member support base 401 so as to be alternately arranged.
  • the edge of the positive electrode member 20 protrudes in one direction (upper left direction in FIG. 1), and the end edge of the negative electrode member 30 protrudes in the other direction (lower right direction in FIG. 1).
  • the two positive electrode members 20 and the two negative electrode members 30 are alternately arranged on the positive and negative electrode member support base 401.
  • the positive electrode member 20 is formed by previously laminating a positive electrode mixture layer containing a positive electrode active material on both surfaces of a positive electrode current collector.
  • the positive electrode current collector is made of aluminum, and the positive electrode active material is made of lithium cobalt oxide complex oxide (LiCoO 2 ).
  • the negative electrode member 30 is formed by previously laminating a negative electrode mixture layer containing a negative electrode active material on both surfaces of a negative electrode current collector.
  • the negative electrode current collector is made of copper, and the negative electrode active material is made of a carbon material.
  • the leading end portion of the strip separator 10 is held by the arm 105 and pulled in the direction indicated by the arrow P by the pulling device 106.
  • the strip-shaped separator 10 having a length necessary for manufacturing a predetermined portion of one battery is pulled out on the separator support base 103 and the lift base 104 via the auxiliary rolls 101 and 102.
  • the elevator 104 can be moved up and down in the direction indicated by the arrow R.
  • a cutter 107 that can move up and down in the direction indicated by the arrow Q is provided below the front end of the strip separator 10. By moving the cutter 107 upward, the leading edge of the strip separator 10 can be cut.
  • belt-shaped separator 10 can move to the direction shown by the arrow S.
  • FIG. The chuck portion 201 protrudes from one side portion of the separator winding device 200, and the one end portion of the belt-like separator 10 is held by sandwiching the tip portion of the belt-like separator 10 up and down.
  • the tip edge portion of the strip separator 10 is cut by the cutter 107 moving upward. Thereafter, the cutter 107 moves downward, and the lifting platform 104 supporting the tip of the strip separator 10 moves downward. In this manner, the one end portion of the strip-shaped separator 10 whose end edge is cut is held by the chuck portion 201 of the separator winding device 200.
  • the adhesive application device 300 that can move left and right in the direction indicated by the arrow T moves so that the adhesive can be applied from the nozzle 301 onto the surface of one side of the strip separator 10.
  • the plurality of nozzles 301 and the adhesive holding part 302 are arranged in the adhesive application device 300 so as to fit a predetermined interval between the positive electrode member 20 and the negative electrode member 30 arranged on the strip separator 10.
  • An amount of adhesive necessary to fix one positive electrode member 20 or negative electrode member 30 on the surface of the strip separator 10 is held in the adhesive holding portion 302.
  • the adhesive is supplied to a plurality of adhesive holding units 302 from a tank (not shown). Then, an adhesive is discharged from each nozzle 301 and applied to a predetermined portion of the strip separator 10.
  • the positive / negative member suction moving device 400 is movable up and down in the direction indicated by the arrow U and left and right in the direction indicated by the arrow V.
  • the positive and negative electrode member suction moving device 400 moves along the direction indicated by the arrow V toward the upper side of the surface of the strip separator 10 (downward to the right in FIG. 5) and is supported by the moving separator support base 103. It is positioned above the surface of the strip separator 10.
  • the positive and negative electrode member suction moving device 400 moves downward, and the plurality of suction portions 402 release suction holding of the plurality of positive electrode members 20 and negative electrode members 30, whereby an adhesive (not shown) is applied.
  • a plurality of positive electrode members 20 and negative electrode members 30 are placed and fixed on the surface of the strip-shaped separator 10.
  • the positive / negative electrode member suction moving device 400 moves to the original position.
  • the left and right moving strokes of the plurality of suction portions 402 are set to be the same.
  • the positive electrode member 20, the negative electrode member 30, the negative electrode member 30, the positive electrode member 20, and the positive electrode member 20 are provided.
  • the separator winding device 200 is continuously rotated in the direction indicated by the arrow W to bend the belt-like separator 10 from one end of the belt-like separator 10, and as shown in FIGS. 8C to 8E.
  • the strip separator 10 is wound in order in one direction. As shown in FIG. 7, a portion of the strip separator 10 to which a predetermined number of positive electrode members 20 and negative electrode members 30 are fixed is wound.
  • the rotation of the separator winding device 200 is stopped.
  • the width W1 of the chuck portion 201 is larger than the width W2 of the positive electrode member 20 (or the negative electrode member 30) and smaller than twice the width W2 (W2 ⁇ W1 ⁇ 2). ⁇ W2).
  • the relationship between the widths W1 and W2 preferably satisfies W2 ⁇ W1 ⁇ 1.2 ⁇ W2.
  • FIG. 9 is a schematic cross-sectional view showing a part of the battery element manufactured by the above-described manufacturing method
  • FIG. 10 is a schematic perspective view showing the appearance of the battery element.
  • a plurality of strip-shaped positive electrode members 20 and a plurality of strip-shaped negative electrode members 30 are alternately stacked with a strip-shaped separator 10 interposed therebetween.
  • the current collector end portions of the plurality of overlapping positive electrode members 20 protrude from one side of the strip separator 10 wound, and the current collector end portions of the plurality of overlapping negative electrode members 30 are wound. It protrudes from the other side of the strip separator 10.
  • the current collector ends of the plurality of positive electrode members 20 are aggregated and electrically connected to the positive electrode connection terminals.
  • the current collector end portions are collected and electrically connected to the negative electrode connection terminal.
  • dissolved electrolyte in the nonaqueous solvent is inject
  • the lithium ion secondary battery is manufactured by sealing the opening of the outer packaging material.
  • the outer packaging material is positioned, for example, on the inner surface side facing the battery element 1 and is formed between an inner surface layer made of synthetic resin, an outer surface layer positioned outside the lithium ion secondary battery, and the inner surface layer and the outer surface layer.
  • the film is formed of a single film composed of an intermediate layer made of a metal, that is, a laminate film having a three-layer structure.
  • the inner layer is made of polypropylene, which is a heat-sealable thermoplastic resin
  • the intermediate layer is made of aluminum foil or aluminum alloy foil, for example
  • the outer layer is made of nylon (registered trademark), for example. .
  • the positive electrode member 20 and the negative electrode member 30 are arranged on the surface of the strip separator 10 along the longitudinal direction of the strip separator 10.
  • a stacked battery in which the strip-shaped separator 10 is interposed between the positive electrode member 20 and the negative electrode member 30 is formed.
  • the positive electrode member 20 and the negative electrode member 30 are arranged on the surface of the strip separator 10, and the strip separator 10 is bent and wound from one end portion of the strip separator 10, so that the one end portion of the strip separator 10 is centered.
  • a structure in which the positive electrode member 20 and the negative electrode member 30 are alternately positioned in a state where the strip separator 10 is interposed between the positive electrode member 20 and the negative electrode member 30 can be realized by a simple process of winding.
  • the positive electrode member 20 and the negative electrode member 30 are disposed only on one surface of the strip separator 10, and the strip separator 10 is bent from one end of the strip separator 10. By winding in one direction, a stacked battery in which the strip separator 10 is interposed between the positive electrode member 20 and the negative electrode member 30 is formed.
  • the positive electrode member 20 and the negative electrode member 30 are disposed only on one surface of the strip separator 10, and the strip separator 10 is folded from one end of the strip separator 10 and wound in one direction.
  • the positive electrode member 20 and the negative electrode member 30 can be folded in a zigzag pattern alternately, or by a simpler process than the method in which the positive electrode member 20 and the negative electrode member 30 are placed on both sides of the strip separator 10 and the strip separator 10 is wound. It is possible to realize a structure in which the positive electrode member 20 and the negative electrode member 30 are alternately positioned with the strip separator 10 interposed therebetween.
  • a plurality of sets of positive electrode members 20 and negative electrode members 30 are arranged in advance on the surface of the strip separator 10, and the strip separator from one end of the strip separator 10 is provided.
  • a stacked battery in which a strip separator 10 is interposed between the positive electrode member 20 and the negative electrode member 30 is formed.
  • the strip separator 10 is folded and wound from one end of the strip separator 10, so After placing the positive electrode member 20 or the negative electrode member 30 on one side one by one, the belt-like separator 10 is alternately bent, or the positive electrode member 20 and the negative electrode member 30 are placed on both sides of the belt-like separator 10 one by one. Thereafter, the process can be simplified as compared with the method of half-rotating the strip separator 10, and the required number of positive electrode members 20 and negative electrode members 30 are placed on the strip separator 10 to stack positive and negative electrode members. The production time until completion is reduced.
  • the edge of the positive electrode member 20 is in the width direction of the strip separator 10.
  • the two positive electrode members 20 and the two negative electrode members 30 are alternately arranged so as to protrude in one direction (upper left direction in FIG. 1) and the edge of the negative electrode member 30 protrudes in the other direction (lower right direction in FIG. 1).
  • the edge of the positive electrode member 20 and the end edge of the negative electrode member 30 are aligned with respect to the width direction of the strip separator 10.
  • the two positive electrode members 20 and the two negative electrode members 30 may be alternately arranged on the positive / negative electrode member support base 401 in advance.
  • the left and right movement strokes of the plurality of suction portions 402 for moving the plurality of positive electrode members 20 above the surface of the strip separator 10 The left and right moving strokes of the plurality of suction portions 402 for moving the negative electrode member 30 above the surface of the strip-shaped separator 10 are not set to be the same, and the moving strokes of the two are made different to each other.
  • the member 30 is moved.
  • the edges of the plurality of positive electrode members 20 protrude from one side of the strip separator 10
  • the edges of the plurality of negative electrode members 30 protrude from the other side of the strip separator 10.
  • the two positive electrode members 20 and the two negative electrode members 30 can be placed on the surface of the strip separator 10.
  • the strip separator 10 is continuously bent from one end portion of the strip separator 10 and wound.
  • production time until the required number of positive electrode members 20 and negative electrode members 30 are mounted on the strip separator 10 and lamination of the positive and negative electrode members is completed can be further shortened.
  • the separator winding device 200 is rotated in the direction indicated by the arrow W.
  • the strip separator 10 may be bent from one end and wound in one direction.
  • the two positive electrode members 20 and the two negative electrode members 30 are alternately arranged on the surface of the strip separator 10.
  • the positive electrode member can be formed in such a state that the belt-like separator 10 is interposed between the positive electrode member 20 and the negative electrode member 30 only by bending the belt-like separator 10 from one end of the belt-like separator 10 and winding it in one direction.
  • a structure in which 20 and the negative electrode member 30 are alternately positioned can be easily realized.
  • the positive electrode member 20 and the negative electrode member 30 are arranged on the surface of the strip separator 10 along the longitudinal direction of the strip separator 10, and the strip shape is centered on one end of the strip separator 10.
  • the separator 10 is bent and wound, the stacked battery element 1 in which the strip separator 10 is interposed between the positive electrode member 20 and the negative electrode member 30 is formed.
  • the structure can realize a stacked battery in which the strip separator 10 is interposed between the positive electrode member 20 and the negative electrode member 30 with high productivity, so that the battery can be manufactured at low cost. is there.
  • the battery of the present invention since the battery of the present invention has a stable structure, there is little variation in characteristics as a product, and as a result, there is an advantage that reliability is high.
  • the battery element 1 may be applied to a battery element such as a lithium secondary battery or a polymer secondary battery.
  • the strip separator 10 is not particularly limited, and conventionally known strip separators can be used.
  • belt-shaped separator 10 should not be limited by the name, What is necessary is just to have a function (role) as a separator.
  • a strip separator 10 containing an inorganic material such as alumina or zirconia may be used.
  • LiNi 1/3 Mn 1/3 Co 1/3 O 2 such as a ternary material or LiMn y Ni 1-y O 2 , LiMn y Co 1-y O 2, LiNi y Co 1-y O 2
  • a binary material such as (wherein y is a numerical value satisfying 0 ⁇ y ⁇ 1) may be used.
  • the positive electrode active material may be a mixture of these main materials.
  • the positive electrode active material may be an olivine-based material such as LiFePO 4 .
  • the carbon material of the negative electrode active material constituting the negative electrode member 30 graphite, hard carbon or the like is used.
  • the negative electrode active material may be a mixture of these main materials.
  • the negative electrode active material may be a ceramic or alloy material such as lithium titanate.
  • the structure of the stacked battery in which the positive electrode member and the negative electrode member are alternately positioned with the strip separator interposed between the positive electrode member and the negative electrode member can be realized with a high productivity and a simple process.
  • the secondary battery such as a lithium ion secondary battery, a lithium secondary battery, or a polymer secondary battery
  • the present invention can be realized with a separator interposed between the positive electrode plate and the negative electrode plate.
  • the present invention can be applied to a stacked secondary battery that is stacked so that plates are alternately positioned and a manufacturing method thereof.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)
  • Materials Engineering (AREA)

Abstract

Provided are a battery having a structure which is capable of enhancing productivity, and alternately positioning positive electrode members and negative electrode members with a belt-like separator interposed between the positive electrode members and the negative electrode members in a simple process, and a method for manufacturing the batery. Strip-like positive electrode members (20) and strip-like negative electrode members (30) are arranged on the surface of a belt-like separator (10) along the longitudinal direction of the belt-like separator (10), and the belt-like separator (10) is bent and rewound from one end of the belt-like separator (10), thereby forming a stacked battery element (1) with the belt-like separator (10) interposed between the positive electrode members (20) and the negative electrode members (30).

Description

電池とその製造方法Battery and manufacturing method thereof
　この発明は、一般的には電池とその製造方法に関し、特定的には、リチウムイオン二次電池、リチウム二次電池、ポリマー二次電池などの二次電池において正極板と負極板の間にセパレータを介在させた状態で正極板と負極板が交互に位置付けられるように積層された積層型二次電池とその製造方法に関するものである。 The present invention generally relates to a battery and a method for manufacturing the same, and more specifically, a separator is interposed between a positive electrode plate and a negative electrode plate in a secondary battery such as a lithium ion secondary battery, a lithium secondary battery, or a polymer secondary battery. The present invention relates to a stacked secondary battery that is stacked such that positive and negative electrode plates are alternately positioned in a state in which the positive electrode plate and the negative electrode plate are positioned, and a method for manufacturing the same.
　従来から、たとえば、枚葉状の正極板と負極板の間に帯状のセパレータを介在させた状態で正極板と負極板が交互に位置付けられるように、ジグザグにセパレータが折り畳まれて二次電池が形成される積層型の二次電池の製造方法が、たとえば、特許第３７９４６３２号公報（以下、特許文献１という）で提案されている。 Conventionally, for example, a secondary battery is formed by folding a separator zigzag so that a positive electrode plate and a negative electrode plate are alternately positioned in a state where a strip-shaped separator is interposed between a sheet-like positive electrode plate and a negative electrode plate. For example, Japanese Patent No. 3794632 (hereinafter referred to as Patent Document 1) proposes a method for manufacturing a stacked secondary battery.
　特許文献１で提案された製造方法では、まず、帯状のセパレータ上に負極板供給機構によって負極板が載置されて、その上にセパレータが折り重ねられる。次に、その折り重ねられた帯状のセパレータ上に正極板供給機構によって正極板が載置されて、その上に帯状のセパレータが折り重ねられる。これらの動作が所定回数繰り返されて負極板と正極板の間に帯状のセパレータが介在された状態で積層される。 In the manufacturing method proposed in Patent Document 1, first, a negative electrode plate is placed on a strip-shaped separator by a negative electrode plate supply mechanism, and the separator is folded thereon. Next, a positive electrode plate is placed on the folded strip-shaped separator by a positive electrode plate supply mechanism, and the strip-shaped separator is folded thereon. These operations are repeated a predetermined number of times, and lamination is performed with a strip-shaped separator interposed between the negative electrode plate and the positive electrode plate.
　また、たとえば、枚葉状の正極板と負極板の間に帯状のセパレータを介在させた状態で正極板と負極板が交互に位置付けられるように、帯状のセパレータが一方向に巻かれて二次電池が形成される積層型の二次電池の製造方法が、たとえば、特許第４０３５１０２号公報（以下、特許文献２という）で提案されている。 Also, for example, a secondary battery is formed by winding a strip-shaped separator in one direction so that the positive and negative plates are alternately positioned with a strip-shaped separator interposed between the sheet-shaped positive and negative plates. For example, Japanese Patent No. 4035102 (hereinafter referred to as Patent Document 2) proposes a method for manufacturing a laminated secondary battery.
　特許文献２で提案された製造方法では、まず、帯状のセパレータの片面側に正極板を、その反対面側に負極板を同時に配置し、その正極板と負極板の間に帯状のセパレータを介在して正極板と負極板の両端部をクランプする。次に、そのクランプ部を一方向に半回転する。この動作を繰り返して、正極板と負極板の間に帯状のセパレータを介在させて、一方向に帯状のセパレータが巻かれた積層型の二次電池が製造される。 In the manufacturing method proposed in Patent Document 2, first, a positive electrode plate is disposed on one side of a strip-shaped separator and a negative plate is disposed simultaneously on the opposite side, and a strip-shaped separator is interposed between the positive electrode plate and the negative electrode plate. Clamp both ends of the positive and negative plates. Next, the clamp part is rotated halfway in one direction. By repeating this operation, a laminated secondary battery in which a strip separator is wound in one direction with a strip separator interposed between the positive electrode plate and the negative electrode plate is manufactured.
特許第３７９４６３２号公報Japanese Patent No. 3794632 特許第４０３５１０２号公報Japanese Patent No. 4035102
　特許文献１に開示された製造方法では、正極板と負極板を交互に一枚ずつ、帯状セパレータの上に載置して、正極板の載置動作と負極板の載置動作との間で、帯状セパレータを折り曲げる動作が間欠的に行われる。このため、必要枚数の正極板と負極板を帯状セパレータの上に載置して正負極板の積層が完了するまでに相対的に長い時間を要する。このため、生産性が極めて低いという問題がある。 In the manufacturing method disclosed in Patent Document 1, a positive electrode plate and a negative electrode plate are alternately placed one by one on a strip separator, and the positive electrode plate is placed between the positive electrode plate and the negative electrode plate. The operation of bending the strip separator is intermittently performed. For this reason, it takes a relatively long time to place the required number of positive and negative electrode plates on the strip separator and complete the lamination of the positive and negative electrode plates. For this reason, there is a problem that productivity is extremely low.
　一方、特許文献２に開示された製造方法では、正極板と負極板を帯状セパレータの両側に同時に載置することができるので、特許文献１に開示された製造方法に比べて生産性が高くなる。しかしながら、正極板と負極板を帯状セパレータの両側に同時に載置した後、正極板と負極板の両端部をクランプして間欠的に半回転させるので、必要枚数の正極板と負極板を帯状セパレータの上に載置して正負極板の積層が完了するまでには相対的に長い時間を要する。このため、生産性を高めるのに限度がある。また、正極板と負極板を帯状セパレータの両側に同時に載置するので、複雑な動作や機構になるという問題がある。 On the other hand, in the manufacturing method disclosed in Patent Document 2, since the positive electrode plate and the negative electrode plate can be simultaneously placed on both sides of the strip separator, the productivity is higher than the manufacturing method disclosed in Patent Document 1. . However, since the positive electrode plate and the negative electrode plate are placed on both sides of the strip separator at the same time, both ends of the positive electrode plate and the negative electrode plate are clamped and rotated halfway intermittently. It takes a relatively long time to complete the lamination of the positive and negative electrode plates. For this reason, there is a limit in increasing productivity. In addition, since the positive electrode plate and the negative electrode plate are simultaneously placed on both sides of the strip separator, there is a problem that a complicated operation and mechanism are required.
　そこで、この発明の目的は、上述のような従来技術の問題点に鑑みて、生産性を高めることができ、かつ、簡単なプロセスで、正極部材と負極部材の間に帯状セパレータを介在させた状態で正極部材と負極部材が交互に位置付けられる構造を有する電池とその製造方法を提供することである。 Accordingly, an object of the present invention is to increase productivity in view of the problems of the prior art as described above, and a belt-like separator is interposed between the positive electrode member and the negative electrode member by a simple process. It is providing the battery which has a structure where a positive electrode member and a negative electrode member are positioned alternately in a state, and its manufacturing method.
　この発明に従った電池の製造方法は、帯状のセパレータの長手方向に沿って短冊状の正極部材と短冊状の負極部材とを帯状のセパレータの表面上に配置し、帯状のセパレータの一方端部から帯状のセパレータを折り曲げて巻き取ることによって、正極部材と負極部材との間に帯状のセパレータが介在した積層型の電池を形成することを特徴とする。 According to the battery manufacturing method of the present invention, a strip-shaped positive electrode member and a strip-shaped negative electrode member are disposed on the surface of the strip-shaped separator along the longitudinal direction of the strip-shaped separator, and one end of the strip-shaped separator is disposed. A laminated battery in which a belt-like separator is interposed between a positive electrode member and a negative electrode member is formed by folding and winding the belt-like separator.
　この発明の製造方法では、短冊状の正極部材と短冊状の負極部材とを帯状のセパレータの表面上に配置し、帯状のセパレータの一方端部から帯状のセパレータを折り曲げて巻き取るので、帯状セパレータの一方端部を中心にして巻き取るという簡単なプロセスで、正極部材と負極部材の間に帯状セパレータを介在させた状態で正極部材と負極部材が交互に位置付けられる構造を実現することができる。 In the manufacturing method of the present invention, the strip-shaped positive electrode member and the strip-shaped negative electrode member are disposed on the surface of the strip-shaped separator, and the strip-shaped separator is bent and wound from one end of the strip-shaped separator. A structure in which the positive electrode member and the negative electrode member are alternately positioned in a state where the strip separator is interposed between the positive electrode member and the negative electrode member can be realized by a simple process of winding around one end of the positive electrode member.
　この発明の電池の製造方法において、正極部材と負極部材とを帯状のセパレータの一方側の表面のみに配置し、帯状のセパレータの一方端部から帯状のセパレータを折り曲げて一方向に巻き取ることによって、正極部材と負極部材との間に帯状のセパレータが介在した積層型の電池を形成することを特徴とすることが好ましい。 In the battery manufacturing method of the present invention, the positive electrode member and the negative electrode member are disposed only on one surface of the belt-shaped separator, and the belt-shaped separator is bent from one end of the belt-shaped separator and wound in one direction. It is preferable that a stacked battery in which a strip-shaped separator is interposed between the positive electrode member and the negative electrode member is formed.
　このように正極部材と負極部材とを帯状のセパレータの一方側の表面のみに配置し、帯状のセパレータの一方端部から帯状のセパレータを折り曲げて一方向に巻き取るので、帯状セパレータを交互にジグザグに折り曲げる方法や、帯状セパレータの両面に正極部材と負極部材を載置して帯状セパレータを巻き取る方法に比べて、より簡単なプロセスで、正極部材と負極部材の間に帯状セパレータを介在させた状態で正極部材と負極部材が交互に位置付けられる構造を実現することができる。 In this way, the positive electrode member and the negative electrode member are arranged only on one surface of the belt-like separator, and the belt-like separator is bent and wound in one direction from one end of the belt-like separator. Compared to the method of folding the belt-shaped separator and the method of placing the positive electrode member and the negative electrode member on both sides of the belt-shaped separator and winding the belt-shaped separator, the belt-shaped separator is interposed between the positive electrode member and the negative electrode member with a simpler process. A structure in which the positive electrode member and the negative electrode member are alternately positioned in the state can be realized.
　また、この発明の電池の製造方法において、正極部材と負極部材とを複数組、帯状のセパレータの表面上に予め配置した状態で、帯状のセパレータの一方端部から帯状のセパレータを折り曲げて巻き取ることによって、正極部材と負極部材との間に帯状のセパレータが介在した積層型の電池を形成することを特徴とすることが好ましい。 Further, in the battery manufacturing method of the present invention, a plurality of positive electrode members and negative electrode members are arranged in advance on the surface of the strip-shaped separator, and the strip-shaped separator is bent and wound from one end of the strip-shaped separator. Thus, it is preferable to form a stacked battery in which a strip-shaped separator is interposed between the positive electrode member and the negative electrode member.
　このように正極部材と負極部材とを複数組、帯状のセパレータの表面上に予め配置した状態で、帯状のセパレータの一方端部から帯状のセパレータを折り曲げて巻き取るので、帯状セパレータの片面上に正極部材または負極部材を一つずつ載置した後、帯状セパレータを交互に折り曲げる方法や、帯状セパレータの両面上に正極部材と負極部材を一組ずつ載置した後、帯状セパレータを半回転する方法に比べて、工程を簡略化することができるとともに、必要数の正極部材と負極部材を帯状セパレータの上に載置して正負極部材の積層が完了するまでの生産時間を短縮することができる。 In this manner, a plurality of sets of positive electrode members and negative electrode members are preliminarily arranged on the surface of the strip-shaped separator, and the strip-shaped separator is folded and wound from one end of the strip-shaped separator. A method of alternately folding the strip separator after placing the positive electrode member or the negative electrode member one by one, or a method of half-rotating the strip separator after placing the positive electrode member and the negative electrode member one pair on both sides of the strip separator Compared to the above, the process can be simplified and the production time until the lamination of the positive and negative electrode members is completed by placing the necessary number of positive electrode members and negative electrode members on the strip separator can be shortened. .
　さらに、上記の場合、帯状のセパレータの一方端部から帯状のセパレータを連続して折り曲げて巻き取ることを特徴とすることが好ましい。 Furthermore, in the above case, it is preferable that the strip separator is continuously bent and wound from one end of the strip separator.
　このようにすることにより、必要数の正極部材と負極部材を帯状セパレータの上に載置して正負極部材の積層が完了するまでの生産時間をより短縮することができる。 By doing in this way, it is possible to further shorten the production time until the required number of positive electrode members and negative electrode members are placed on the strip separator and the lamination of the positive and negative electrode members is completed.
　なお、この発明の電池の製造方法において、二つの正極部材と二つの負極部材とを交互に帯状のセパレータの表面上に配置することを特徴とすることが好ましい。 In the battery manufacturing method of the present invention, it is preferable that two positive electrode members and two negative electrode members are alternately arranged on the surface of a strip-shaped separator.
　このようにすることにより、帯状のセパレータの一方端部から帯状のセパレータを折り曲げて一方向に巻き取るだけで、正極部材と負極部材の間に帯状セパレータを介在させた状態で正極部材と負極部材が交互に位置付けられる構造を簡単に実現することができる。 By doing so, the positive electrode member and the negative electrode member can be formed in such a state that the belt-like separator is interposed between the positive electrode member and the negative electrode member only by bending the belt-like separator from one end of the belt-like separator and winding it in one direction. A structure in which can be alternately positioned can be realized.
　この発明に従った電池は、帯状のセパレータの長手方向に沿って正極部材と負極部材とが帯状のセパレータの表面上に配置され、帯状のセパレータの一方端部を中心として帯状のセパレータが折り曲げられて巻かれることによって、正極部材と負極部材との間に帯状のセパレータが介在した積層型の電池が形成されていることを特徴とする。 In the battery according to the present invention, the positive electrode member and the negative electrode member are arranged on the surface of the strip separator along the longitudinal direction of the strip separator, and the strip separator is bent around one end of the strip separator. Thus, a laminated battery in which a strip-shaped separator is interposed between the positive electrode member and the negative electrode member is formed.
　この発明の電池は、高い生産性で、正極部材と負極部材との間に帯状のセパレータが介在した積層型の電池を実現することができる構造であるので、低コストで製造可能である。また、この発明の電池は、安定した構造を有するので、製造物としての特性のバラツキが少なく、その結果、信頼性が高いという利点を有する。 Since the battery of the present invention has a structure capable of realizing a stacked battery in which a strip-shaped separator is interposed between the positive electrode member and the negative electrode member with high productivity, it can be manufactured at low cost. In addition, since the battery of the present invention has a stable structure, there is little variation in characteristics as a product, and as a result, there is an advantage that reliability is high.
　この発明の電池において、正極部材と負極部材とが帯状のセパレータの一方側の表面のみに配置されていることを特徴とすることが好ましい。 In the battery of the present invention, it is preferable that the positive electrode member and the negative electrode member are disposed only on one surface of the strip-shaped separator.
　また、この発明の電池において、二つの正極部材と二つの負極部材とが交互に帯状のセパレータの表面上に配置されていることを特徴とすることが好ましい。 In the battery of the present invention, it is preferable that two positive electrode members and two negative electrode members are alternately arranged on the surface of the strip-shaped separator.
　以上のようにこの発明によれば、正極部材と負極部材の間に帯状セパレータを介在させた状態で正極部材と負極部材が交互に位置付けられる積層型の電池の構造を、高い生産性で、かつ、簡単なプロセスで実現することができる。 As described above, according to the present invention, the stacked battery structure in which the positive electrode member and the negative electrode member are alternately positioned in a state where the strip separator is interposed between the positive electrode member and the negative electrode member can be obtained with high productivity, and Can be realized in a simple process.
この発明の一つの実施の形態である電池の製造方法の第１工程を示す概略的な斜視図である。It is a schematic perspective view which shows the 1st process of the manufacturing method of the battery which is one embodiment of this invention. この発明の一つの実施の形態である電池の製造方法の第２工程を示す概略的な斜視図である。It is a schematic perspective view which shows the 2nd process of the manufacturing method of the battery which is one embodiment of this invention. この発明の一つの実施の形態である電池の製造方法の第３工程を示す概略的な斜視図である。It is a schematic perspective view which shows the 3rd process of the manufacturing method of the battery which is one embodiment of this invention. この発明の一つの実施の形態である電池の製造方法の第４工程を示す概略的な斜視図である。It is a schematic perspective view which shows the 4th process of the manufacturing method of the battery which is one embodiment of this invention. この発明の一つの実施の形態である電池の製造方法の第５工程を示す概略的な斜視図である。It is a schematic perspective view which shows the 5th process of the manufacturing method of the battery which is one embodiment of this invention. この発明の一つの実施の形態である電池の製造方法の第６工程を示す概略的な斜視図である。It is a schematic perspective view which shows the 6th process of the manufacturing method of the battery which is one embodiment of this invention. この発明の一つの実施の形態である電池の製造方法の第７工程を示す概略的な斜視図である。It is a schematic perspective view which shows the 7th process of the manufacturing method of the battery which is one embodiment of this invention. この発明の一つの実施の形態である電池の製造方法においてセパレータが折り曲げられて巻かれる工程を順に示す模式的な斜視図または断面図である。It is a typical perspective view or sectional view which shows a process in which a separator is bent and wound in order in a manufacturing method of a battery which is one embodiment of this invention. この発明の一つの実施の形態である製造方法によって製造された電池要素の一部分を示す概略的な断面図である。It is a schematic sectional drawing which shows a part of battery element manufactured by the manufacturing method which is one embodiment of this invention. この発明の一つの実施の形態である製造方法によって製造された電池要素の外観を示す概略的な斜視図である。It is a schematic perspective view which shows the external appearance of the battery element manufactured by the manufacturing method which is one embodiment of this invention.
　以下、この発明の電池とその製造方法の実施の形態を図面に基づいて説明する。 Hereinafter, embodiments of the battery of the present invention and the manufacturing method thereof will be described with reference to the drawings.
　図１～図８を参照して本発明の電池、たとえば、リチウムイオン二次電池の製造方法の一つの実施の形態について説明する。 One embodiment of a method of manufacturing a battery of the present invention, for example, a lithium ion secondary battery, will be described with reference to FIGS.
　まず、図１に示すように、電池製造装置１０００は、セパレータロール１００と、セパレータ巻き取り装置２００と、接着剤付与装置３００と、正負極部材吸引移動装置４００とを備える。長尺の帯状セパレータ１０がセパレータロール１００に巻かれた状態で準備される。セパレータロール１００から帯状セパレータ１０を繰り出し、かつ、繰り出された帯状セパレータ１０を支持することができるように、補助ロール１０１、１０２、セパレータ支持台１０３、および、昇降台１０４が順に配置されている。セパレータ支持台１０３の一方側には、帯状セパレータ１０の表面上に接着剤を塗布するための接着剤付与装置３００が配置され、他方側には、接着剤が塗布された帯状セパレータ１０の表面上に正負極部材を載置するための正負極部材吸引移動装置４００が配置されている。複数の短冊状の正極部材２０と負極部材３０が正負極部材支持台４０１の上に予め載置されている。セパレータ巻き取り装置２００からセパレータロール１００に向かって、正極部材２０、負極部材３０、負極部材３０、正極部材２０、正極部材２０、負極部材３０、負極部材３０、正極部材２０、正極部材２０、・・・の順に、先頭の一つの正極部材２０を除いては、二つの正極部材２０と二つの負極部材３０とが交互に並ぶように正負極部材支持台４０１の上に配置されている。帯状セパレータ１０の幅方向に対して、正極部材２０の端縁が一方向（図１では左上方向）に突出し、負極部材３０の端縁が他の方向（図１では右下方向）に突出するように、二つの正極部材２０と二つの負極部材３０とが正負極部材支持台４０１の上に交互に配置されている。 First, as shown in FIG. 1, the battery manufacturing apparatus 1000 includes a separator roll 100, a separator winding device 200, an adhesive application device 300, and a positive / negative electrode member suction moving device 400. A long strip separator 10 is prepared in a state of being wound around a separator roll 100. The auxiliary rolls 101 and 102, the separator support base 103, and the lifting base 104 are arranged in order so that the strip separator 10 can be fed out from the separator roll 100 and the fed strip separator 10 can be supported. An adhesive application device 300 for applying an adhesive on the surface of the strip separator 10 is disposed on one side of the separator support base 103, and on the surface of the strip separator 10 coated with an adhesive on the other side. The positive / negative electrode member suction / moving device 400 for placing the positive / negative electrode member on is arranged. A plurality of strip-like positive electrode members 20 and negative electrode members 30 are previously placed on a positive / negative electrode member support base 401. From the separator winding device 200 toward the separator roll 100, the positive electrode member 20, the negative electrode member 30, the negative electrode member 30, the positive electrode member 20, the positive electrode member 20, the negative electrode member 30, the negative electrode member 30, the positive electrode member 20, the positive electrode member 20,. In this order, except for the first positive electrode member 20, the two positive electrode members 20 and the two negative electrode members 30 are arranged on the positive and negative electrode member support base 401 so as to be alternately arranged. With respect to the width direction of the strip separator 10, the edge of the positive electrode member 20 protrudes in one direction (upper left direction in FIG. 1), and the end edge of the negative electrode member 30 protrudes in the other direction (lower right direction in FIG. 1). As described above, the two positive electrode members 20 and the two negative electrode members 30 are alternately arranged on the positive and negative electrode member support base 401.
　なお、ここで、正極部材２０は、正極集電体の両面に正極活物質を含む正極合剤層が予め積層されることにより形成されたものである。一例として、正極集電体はアルミニウムからなり、正極活物質はコバルト酸リチウム複合酸化物（ＬｉＣｏＯ２）からなる。一方、負極部材３０は、負極集電体の両面に負極活物質を含む負極合剤層が予め積層されて形成されたものである。一例として、負極集電体は銅からなり、負極活物質は炭素材料からなる。 Here, the positive electrode member 20 is formed by previously laminating a positive electrode mixture layer containing a positive electrode active material on both surfaces of a positive electrode current collector. As an example, the positive electrode current collector is made of aluminum, and the positive electrode active material is made of lithium cobalt oxide complex oxide (LiCoO 2 ). On the other hand, the negative electrode member 30 is formed by previously laminating a negative electrode mixture layer containing a negative electrode active material on both surfaces of a negative electrode current collector. As an example, the negative electrode current collector is made of copper, and the negative electrode active material is made of a carbon material.
　セパレータロール１００から帯状セパレータ１０を繰り出すために、帯状セパレータ１０の先端部をアーム１０５で保持して引っ張り装置１０６によって矢印Ｐで示す方向に引っ張る。これにより、一つの電池の所定部分の作製に必要な長さの帯状セパレータ１０が補助ロール１０１、１０２を介してセパレータ支持台１０３と昇降台１０４の上に引き出される。昇降台１０４は、矢印Ｒで示す方向に上下移動可能である。 In order to feed the strip separator 10 from the separator roll 100, the leading end portion of the strip separator 10 is held by the arm 105 and pulled in the direction indicated by the arrow P by the pulling device 106. As a result, the strip-shaped separator 10 having a length necessary for manufacturing a predetermined portion of one battery is pulled out on the separator support base 103 and the lift base 104 via the auxiliary rolls 101 and 102. The elevator 104 can be moved up and down in the direction indicated by the arrow R.
　次に、図２に示すように、帯状セパレータ１０の先端部の下方には、矢印Ｑで示す方向に上下移動可能なカッター１０７が設けられている。このカッター１０７が上方に移動することによって帯状セパレータ１０の先端縁部を切断することができる。 Next, as shown in FIG. 2, a cutter 107 that can move up and down in the direction indicated by the arrow Q is provided below the front end of the strip separator 10. By moving the cutter 107 upward, the leading edge of the strip separator 10 can be cut.
　そして、図３に示すように、帯状セパレータ１０の先端部を保持するチャック部２０１は、矢印Ｓで示す方向に移動可能である。セパレータ巻き取り装置２００の一方側部からチャック部２０１が突出して、帯状セパレータ１０の先端部を上下で挟むことによって、帯状セパレータ１０の一方端部が保持される。この状態で、カッター１０７が上方に移動することによって帯状セパレータ１０の先端縁部が切断される。その後、カッター１０７が下方に移動するとともに、帯状セパレータ１０の先端部を支持していた昇降台１０４が下方に移動する。このようにして、帯状セパレータ１０の先端縁部が切断された一方端部がセパレータ巻き取り装置２００のチャック部２０１によって保持される。 And as shown in FIG. 3, the chuck | zipper part 201 holding the front-end | tip part of the strip | belt-shaped separator 10 can move to the direction shown by the arrow S. FIG. The chuck portion 201 protrudes from one side portion of the separator winding device 200, and the one end portion of the belt-like separator 10 is held by sandwiching the tip portion of the belt-like separator 10 up and down. In this state, the tip edge portion of the strip separator 10 is cut by the cutter 107 moving upward. Thereafter, the cutter 107 moves downward, and the lifting platform 104 supporting the tip of the strip separator 10 moves downward. In this manner, the one end portion of the strip-shaped separator 10 whose end edge is cut is held by the chuck portion 201 of the separator winding device 200.
　図４に示すように、矢印Ｔで示す方向に左右に移動可能な接着剤付与装置３００は、帯状セパレータ１０の一方側の表面上にノズル３０１から接着剤を塗布することができるように移動する。複数のノズル３０１と接着剤保持部３０２は、帯状セパレータ１０の上に配置される正極部材２０と負極部材３０の所定の間隔に合うように接着剤付与装置３００に配置されている。一つの正極部材２０または負極部材３０を帯状セパレータ１０の表面上に固着するのに必要な量の接着剤が接着剤保持部３０２に保持されている。接着剤は、タンク（図示せず）から複数の接着剤保持部３０２に供給される。そして、各ノズル３０１から接着剤が吐出され、帯状セパレータ１０の所定の箇所に塗布される。 As shown in FIG. 4, the adhesive application device 300 that can move left and right in the direction indicated by the arrow T moves so that the adhesive can be applied from the nozzle 301 onto the surface of one side of the strip separator 10. . The plurality of nozzles 301 and the adhesive holding part 302 are arranged in the adhesive application device 300 so as to fit a predetermined interval between the positive electrode member 20 and the negative electrode member 30 arranged on the strip separator 10. An amount of adhesive necessary to fix one positive electrode member 20 or negative electrode member 30 on the surface of the strip separator 10 is held in the adhesive holding portion 302. The adhesive is supplied to a plurality of adhesive holding units 302 from a tank (not shown). Then, an adhesive is discharged from each nozzle 301 and applied to a predetermined portion of the strip separator 10.
　その後、図５に示すように接着剤付与装置３００が元の位置に移動する。正負極部材吸引移動装置４００は、矢印Ｕに示す方向に上下と矢印Ｖで示す方向に左右に移動可能である。正負極部材吸引移動装置４００が上下方向に移動することにより、複数の吸引部４０２が複数の正極部材２０と負極部材３０を吸引保持する。その後、正負極部材吸引移動装置４００が、矢印Ｖで示す方向に沿って、帯状セパレータ１０の表面の上方に向かって（図５では右下方向に）移動し、移動セパレータ支持台１０３で支持された帯状セパレータ１０の表面の上方に位置付けられる。そして、正負極部材吸引移動装置４００が下方向に移動し、複数の吸引部４０２が複数の正極部材２０と負極部材３０の吸引保持を解除することにより、接着剤（図示せず）が塗布された帯状セパレータ１０の表面上に、複数の正極部材２０と負極部材３０が置かれて固着される。正負極部材吸引移動装置４００が元の位置に移動する。この場合、複数の正極部材２０を帯状セパレータ１０の表面の上方に移動させるための複数の吸引部４０２の左右の移動ストロークと、複数の負極部材３０を帯状セパレータ１０の表面の上方に移動させるための複数の吸引部４０２の左右の移動ストロークとは同じに設定される。 Thereafter, as shown in FIG. 5, the adhesive application device 300 moves to the original position. The positive / negative member suction moving device 400 is movable up and down in the direction indicated by the arrow U and left and right in the direction indicated by the arrow V. By moving the positive / negative electrode member suction moving device 400 in the vertical direction, the plurality of suction portions 402 suck and hold the plurality of positive electrode members 20 and the negative electrode members 30. Thereafter, the positive and negative electrode member suction moving device 400 moves along the direction indicated by the arrow V toward the upper side of the surface of the strip separator 10 (downward to the right in FIG. 5) and is supported by the moving separator support base 103. It is positioned above the surface of the strip separator 10. Then, the positive and negative electrode member suction moving device 400 moves downward, and the plurality of suction portions 402 release suction holding of the plurality of positive electrode members 20 and negative electrode members 30, whereby an adhesive (not shown) is applied. A plurality of positive electrode members 20 and negative electrode members 30 are placed and fixed on the surface of the strip-shaped separator 10. The positive / negative electrode member suction moving device 400 moves to the original position. In this case, the left and right moving strokes of the plurality of suction portions 402 for moving the plurality of positive electrode members 20 above the surface of the strip separator 10 and the plurality of the negative electrode members 30 for moving above the surface of the strip separator 10. The left and right moving strokes of the plurality of suction portions 402 are set to be the same.
　このようにして、図６と図８（Ａ）に示すように、セパレータ巻き取り装置２００からセパレータロール１００に向かって、正極部材２０、負極部材３０、負極部材３０、正極部材２０、正極部材２０、負極部材３０、負極部材３０、正極部材２０、正極部材２０、・・・の順に、先頭の一つの正極部材２０を除いては、二つの正極部材２０と二つの負極部材３０とが交互に並ぶように帯状セパレータ１０の一方の表面上に配置されて固着される。複数の正極部材２０の端縁が帯状セパレータ１０の一方側から突出し、複数の負極部材３０の端縁が帯状セパレータ１０の他方側から突出するように位置付けられる。 In this way, as shown in FIGS. 6 and 8A, from the separator winding device 200 toward the separator roll 100, the positive electrode member 20, the negative electrode member 30, the negative electrode member 30, the positive electrode member 20, and the positive electrode member 20 are provided. , Negative electrode member 30, negative electrode member 30, positive electrode member 20, positive electrode member 20,..., Except for the first positive electrode member 20, two positive electrode members 20 and two negative electrode members 30 are alternately arranged. It arrange | positions and adheres on one surface of the strip | belt-shaped separator 10 so that it may rank. The edge of the some positive electrode member 20 protrudes from the one side of the strip | belt-shaped separator 10, and it positions so that the edge of the some negative electrode member 30 protrudes from the other side of the strip | belt-shaped separator 10. FIG.
　そして、図７と図８（Ｂ）に示すように、セパレータ巻き取り装置２００が矢印Ｗで示す方向に回転することにより、チャック部２０１によって保持された帯状セパレータ１０の一方端部が上方に回動する。 Then, as shown in FIGS. 7 and 8B, when the separator winding device 200 rotates in the direction indicated by the arrow W, one end of the strip separator 10 held by the chuck portion 201 rotates upward. Move.
　その後、セパレータ巻き取り装置２００を連続的に矢印Ｗで示す方向に回転することにより、帯状セパレータ１０の一方端部から帯状セパレータ１０を折り曲げて、図８（Ｃ）～（Ｅ）に示すように一方向に帯状セパレータ１０を順に巻き取っていく。図７に示されるように所定の数の正極部材２０と負極部材３０が固着された帯状セパレータ１０の部分が巻き取られる。この帯状セパレータ１０の部分の巻き取りが終了すると、セパレータ巻き取り装置２００の回転が停止される。 Thereafter, the separator winding device 200 is continuously rotated in the direction indicated by the arrow W to bend the belt-like separator 10 from one end of the belt-like separator 10, and as shown in FIGS. 8C to 8E. The strip separator 10 is wound in order in one direction. As shown in FIG. 7, a portion of the strip separator 10 to which a predetermined number of positive electrode members 20 and negative electrode members 30 are fixed is wound. When the winding of the strip separator 10 is finished, the rotation of the separator winding device 200 is stopped.
　以上で説明された図１～図７の工程が順次繰り返される。一つの電池要素の製造において必要な長さの帯状セパレータ１０の巻き取りが完了すると、チャック部２０１を後退させて、巻き取られた帯状セパレータ１０の芯部から抜く。そして、帯状セパレータ１０の一方端部側、あるいはセパレータロール１００側の他方端部にて帯状セパレータ１０を切断装置（図示せず）で切断する。なお、余剰の帯状セパレータ１０は、さらにセパレータ巻き取り装置２００を回転させて帯状セパレータ１０のみを巻き取ってもよい。これにより、図９と図１０に示されるような形態の積層型の電池要素が製造される。 1 to 7 described above are sequentially repeated. When winding of the strip separator 10 having a length necessary for manufacturing one battery element is completed, the chuck portion 201 is retracted and removed from the core portion of the wound strip separator 10. And the strip | belt-shaped separator 10 is cut | disconnected by a cutting device (not shown) in the one end part side of the strip | belt-shaped separator 10, or the other end part by the side of the separator roll 100. FIG. In addition, the excess strip separator 10 may further wind up only the strip separator 10 by rotating the separator winding device 200. As a result, a stacked battery element having a configuration as shown in FIGS. 9 and 10 is manufactured.
　なお、図８（Ｃ）に示すように、チャック部２０１の幅Ｗ１は、正極部材２０（または負極部材３０）の幅Ｗ２よりも大きく、幅Ｗ２の２倍よりも小さい（Ｗ２＜Ｗ１＜２×Ｗ２）。正極部材２０（または負極部材３０）の幅方向の両側におけるセパレータ１０のマージンを考慮して、上記の幅Ｗ１とＷ２の関係はＷ２＜Ｗ１＜１．２×Ｗ２を満たすのが好ましい。 As shown in FIG. 8C, the width W1 of the chuck portion 201 is larger than the width W2 of the positive electrode member 20 (or the negative electrode member 30) and smaller than twice the width W2 (W2 <W1 <2). × W2). In consideration of the margin of the separator 10 on both sides in the width direction of the positive electrode member 20 (or the negative electrode member 30), the relationship between the widths W1 and W2 preferably satisfies W2 <W1 <1.2 × W2.
　図９は上述した製造方法によって製造された電池要素の一部分を示す概略的な断面図、図１０はその電池要素の外観を示す概略的な斜視図である。 FIG. 9 is a schematic cross-sectional view showing a part of the battery element manufactured by the above-described manufacturing method, and FIG. 10 is a schematic perspective view showing the appearance of the battery element.
　図９に示すように、電池要素では、複数の短冊状の正極部材２０と複数の短冊状の負極部材３０とが、帯状セパレータ１０を介して、交互に積層されて形成されている。 As shown in FIG. 9, in the battery element, a plurality of strip-shaped positive electrode members 20 and a plurality of strip-shaped negative electrode members 30 are alternately stacked with a strip-shaped separator 10 interposed therebetween.
　図１０に示すように、複数の重なった正極部材２０の集電体端部が巻かれた帯状セパレータ１０の一方側から突出し、複数の重なった負極部材３０の集電体端部が巻かれた帯状セパレータ１０の他方側から突出している。 As shown in FIG. 10, the current collector end portions of the plurality of overlapping positive electrode members 20 protrude from one side of the strip separator 10 wound, and the current collector end portions of the plurality of overlapping negative electrode members 30 are wound. It protrudes from the other side of the strip separator 10.
　その後、図９と図１０に示すように製造された電池要素１は、複数の正極部材２０の集電体端部が集約されて正極接続端子に電気的に接続され、複数の負極部材３０の集電体端部が集約されて負極接続端子に電気的に接続される。そして、電池要素１を外包材に収容し、開口部を残してそれ以外の部分を封止した後、非水系溶媒に電解質を溶解させた非水電解液を開口部から注入する。最後に外包材の開口部を封止することにより、リチウムイオン二次電池を作製する。 Thereafter, in the battery element 1 manufactured as shown in FIGS. 9 and 10, the current collector ends of the plurality of positive electrode members 20 are aggregated and electrically connected to the positive electrode connection terminals. The current collector end portions are collected and electrically connected to the negative electrode connection terminal. And after accommodating the battery element 1 in an outer packaging material and sealing an other part leaving an opening part, the nonaqueous electrolyte solution which melt | dissolved electrolyte in the nonaqueous solvent is inject | poured from an opening part. Finally, the lithium ion secondary battery is manufactured by sealing the opening of the outer packaging material.
　外包材は、たとえば、電池要素１に面する内面側に位置付けられ、合成樹脂からなる内面層と、リチウムイオン二次電池の外側に位置付けられた外面層と、内面層と外面層との間に介在し、金属からなる中間層とから構成される単一のフィルム、すなわち、三層構造のラミネートフィルムで形成されている。内面層は、一例として、ヒートシール可能な熱可塑性樹脂であるポリプロピレンからなり、中間層は、一例として、アルミニウム箔またはアルミニウム合金箔からなり、外面層は、一例として、ナイロン（登録商標）からなる。 The outer packaging material is positioned, for example, on the inner surface side facing the battery element 1 and is formed between an inner surface layer made of synthetic resin, an outer surface layer positioned outside the lithium ion secondary battery, and the inner surface layer and the outer surface layer. The film is formed of a single film composed of an intermediate layer made of a metal, that is, a laminate film having a three-layer structure. For example, the inner layer is made of polypropylene, which is a heat-sealable thermoplastic resin, the intermediate layer is made of aluminum foil or aluminum alloy foil, for example, and the outer layer is made of nylon (registered trademark), for example. .
　以上のようにこの発明に従った電池の製造方法では、要約すれば、帯状セパレータ１０の長手方向に沿って正極部材２０と負極部材３０とを帯状セパレータ１０の表面上に配置し、帯状セパレータ１０の一方端部から帯状セパレータ１０を折り曲げて巻き取ることによって、正極部材２０と負極部材３０との間に帯状セパレータ１０が介在した積層型の電池を形成する。 As described above, in the battery manufacturing method according to the present invention, in summary, the positive electrode member 20 and the negative electrode member 30 are arranged on the surface of the strip separator 10 along the longitudinal direction of the strip separator 10. By folding and winding the strip-shaped separator 10 from one end of the battery, a stacked battery in which the strip-shaped separator 10 is interposed between the positive electrode member 20 and the negative electrode member 30 is formed.
　このように正極部材２０と負極部材３０とを帯状セパレータ１０の表面上に配置し、帯状セパレータ１０の一方端部から帯状セパレータ１０を折り曲げて巻き取るので、帯状セパレータ１０の一方端部を中心にして巻き取るという簡単なプロセスで、正極部材２０と負極部材３０の間に帯状セパレータ１０を介在させた状態で正極部材２０と負極部材３０が交互に位置付けられる構造を実現することができる。 Thus, the positive electrode member 20 and the negative electrode member 30 are arranged on the surface of the strip separator 10, and the strip separator 10 is bent and wound from one end portion of the strip separator 10, so that the one end portion of the strip separator 10 is centered. A structure in which the positive electrode member 20 and the negative electrode member 30 are alternately positioned in a state where the strip separator 10 is interposed between the positive electrode member 20 and the negative electrode member 30 can be realized by a simple process of winding.
　また、この発明の電池の製造方法の一つの局面では、正極部材２０と負極部材３０とを帯状セパレータ１０の一方側の表面のみに配置し、帯状セパレータ１０の一方端部から帯状セパレータ１０を折り曲げて一方向に巻き取ることによって、正極部材２０と負極部材３０との間に帯状セパレータ１０が介在した積層型の電池を形成する。 Further, in one aspect of the battery manufacturing method of the present invention, the positive electrode member 20 and the negative electrode member 30 are disposed only on one surface of the strip separator 10, and the strip separator 10 is bent from one end of the strip separator 10. By winding in one direction, a stacked battery in which the strip separator 10 is interposed between the positive electrode member 20 and the negative electrode member 30 is formed.
　このように正極部材２０と負極部材３０とを帯状セパレータ１０の一方側の表面のみに配置し、帯状セパレータ１０の一方端部から帯状セパレータ１０を折り曲げて一方向に巻き取るので、帯状セパレータ１０を交互にジグザグに折り曲げる方法や、帯状セパレータ１０の両面に正極部材２０と負極部材３０を載置して帯状セパレータ１０を巻き取る方法に比べて、より簡単なプロセスで、正極部材２０と負極部材３０の間に帯状セパレータ１０を介在させた状態で正極部材２０と負極部材３０が交互に位置付けられる構造を実現することができる。 Thus, the positive electrode member 20 and the negative electrode member 30 are disposed only on one surface of the strip separator 10, and the strip separator 10 is folded from one end of the strip separator 10 and wound in one direction. The positive electrode member 20 and the negative electrode member 30 can be folded in a zigzag pattern alternately, or by a simpler process than the method in which the positive electrode member 20 and the negative electrode member 30 are placed on both sides of the strip separator 10 and the strip separator 10 is wound. It is possible to realize a structure in which the positive electrode member 20 and the negative electrode member 30 are alternately positioned with the strip separator 10 interposed therebetween.
　また、この発明の電池の製造方法の別の局面では、正極部材２０と負極部材３０とを複数組、帯状セパレータ１０の表面上に予め配置した状態で、帯状セパレータ１０の一方端部から帯状セパレータ１０を折り曲げて巻き取ることによって、正極部材２０と負極部材３０との間に帯状セパレータ１０が介在した積層型の電池を形成する。 In another aspect of the battery manufacturing method of the present invention, a plurality of sets of positive electrode members 20 and negative electrode members 30 are arranged in advance on the surface of the strip separator 10, and the strip separator from one end of the strip separator 10 is provided. By bending and winding 10, a stacked battery in which a strip separator 10 is interposed between the positive electrode member 20 and the negative electrode member 30 is formed.
　このように正極部材２０と負極部材３０とを複数組、帯状セパレータ１０の表面上に予め配置した状態で、帯状セパレータ１０の一方端部から帯状セパレータ１０を折り曲げて巻き取るので、帯状セパレータ１０の片面上に正極部材２０または負極部材３０を一つずつ載置した後、帯状セパレータ１０を交互に折り曲げる方法や、帯状セパレータ１０の両面上に正極部材２０と負極部材３０を一組ずつ載置した後、帯状セパレータ１０を半回転する方法に比べて、工程を簡略化することができるとともに、必要数の正極部材２０と負極部材３０を帯状セパレータ１０の上に載置して正負極部材の積層が完了するまでの生産時間を短縮することができる。 In this way, in a state where a plurality of sets of the positive electrode member 20 and the negative electrode member 30 are arranged in advance on the surface of the strip separator 10, the strip separator 10 is folded and wound from one end of the strip separator 10, so After placing the positive electrode member 20 or the negative electrode member 30 on one side one by one, the belt-like separator 10 is alternately bent, or the positive electrode member 20 and the negative electrode member 30 are placed on both sides of the belt-like separator 10 one by one. Thereafter, the process can be simplified as compared with the method of half-rotating the strip separator 10, and the required number of positive electrode members 20 and negative electrode members 30 are placed on the strip separator 10 to stack positive and negative electrode members. The production time until completion is reduced.
　上記の実施形態では、図１に示すように、帯状セパレータ１０の表面上に正極部材２０と負極部材３０とを載せる前に、帯状セパレータ１０の幅方向に対して、正極部材２０の端縁が一方向（図１では左上方向）に突出し、負極部材３０の端縁が他の方向（図１では右下方向）に突出するように、二つの正極部材２０と二つの負極部材３０とを交互に正負極部材支持台４０１の上に予め配置している。しかし、帯状セパレータ１０の表面上に正極部材２０と負極部材３０とを載せる前には、帯状セパレータ１０の幅方向に対して、正極部材２０の端縁と負極部材３０の端縁を整列させて、二つの正極部材２０と二つの負極部材３０とを交互に正負極部材支持台４０１の上に予め配置しておいてもよい。このようにした場合には、図５～図６に示す工程では、複数の正極部材２０を帯状セパレータ１０の表面の上方に移動させるための複数の吸引部４０２の左右の移動ストロークと、複数の負極部材３０を帯状セパレータ１０の表面の上方に移動させるための複数の吸引部４０２の左右の移動ストロークとを、同じに設定しないで、両者の移動ストロークを異ならせて複数の正極部材２０と負極部材３０を移動させる。このようにすることにより、帯状セパレータ１０の表面上では、複数の正極部材２０の端縁が帯状セパレータ１０の一方側から突出し、複数の負極部材３０の端縁が帯状セパレータ１０の他方側から突出するように位置付けられるように、二つの正極部材２０と二つの負極部材３０とを帯状セパレータ１０の表面上に載せることができる。 In the above embodiment, as shown in FIG. 1, before placing the positive electrode member 20 and the negative electrode member 30 on the surface of the strip separator 10, the edge of the positive electrode member 20 is in the width direction of the strip separator 10. The two positive electrode members 20 and the two negative electrode members 30 are alternately arranged so as to protrude in one direction (upper left direction in FIG. 1) and the edge of the negative electrode member 30 protrudes in the other direction (lower right direction in FIG. 1). Are arranged in advance on the positive and negative electrode member support base 401. However, before placing the positive electrode member 20 and the negative electrode member 30 on the surface of the strip separator 10, the edge of the positive electrode member 20 and the end edge of the negative electrode member 30 are aligned with respect to the width direction of the strip separator 10. The two positive electrode members 20 and the two negative electrode members 30 may be alternately arranged on the positive / negative electrode member support base 401 in advance. In this case, in the steps shown in FIGS. 5 to 6, the left and right movement strokes of the plurality of suction portions 402 for moving the plurality of positive electrode members 20 above the surface of the strip separator 10, The left and right moving strokes of the plurality of suction portions 402 for moving the negative electrode member 30 above the surface of the strip-shaped separator 10 are not set to be the same, and the moving strokes of the two are made different to each other. The member 30 is moved. In this way, on the surface of the strip separator 10, the edges of the plurality of positive electrode members 20 protrude from one side of the strip separator 10, and the edges of the plurality of negative electrode members 30 protrude from the other side of the strip separator 10. As such, the two positive electrode members 20 and the two negative electrode members 30 can be placed on the surface of the strip separator 10.
　さらに、上記の実施形態では、帯状セパレータ１０の一方端部から帯状セパレータ１０を連続して折り曲げて巻き取る。このようにすることにより、必要数の正極部材２０と負極部材３０を帯状セパレータ１０の上に載置して正負極部材の積層が完了するまでの生産時間をより短縮することができる。このように生産性をより向上させるためにセパレータ巻き取り装置２００を連続回転させることが好ましいが、間欠回転させてもよい。なお、上記の実施形態では、図７に示すように、セパレータ巻き取り装置２００を矢印Ｗで示す方向に回転させているが、矢印Ｗと逆の方向に回転させることにより、帯状セパレータ１０の一方端部から帯状セパレータ１０を折り曲げて一方向に巻き取ってもよい。 Furthermore, in the above embodiment, the strip separator 10 is continuously bent from one end portion of the strip separator 10 and wound. By doing in this way, production time until the required number of positive electrode members 20 and negative electrode members 30 are mounted on the strip separator 10 and lamination of the positive and negative electrode members is completed can be further shortened. Thus, in order to improve productivity more, it is preferable to rotate the separator winding device 200 continuously, but it may be intermittently rotated. In the above embodiment, as shown in FIG. 7, the separator winding device 200 is rotated in the direction indicated by the arrow W. However, by rotating the separator winding device 200 in the direction opposite to the arrow W, The strip separator 10 may be bent from one end and wound in one direction.
　さらにまた、上記の実施形態では、二つの正極部材２０と二つの負極部材３０とを交互に帯状セパレータ１０の表面上に配置する。このようにすることにより、帯状セパレータ１０の一方端部から帯状セパレータ１０を折り曲げて一方向に巻き取るだけで、正極部材２０と負極部材３０の間に帯状セパレータ１０を介在させた状態で正極部材２０と負極部材３０が交互に位置付けられる構造を簡単に実現することができる。 Furthermore, in the above embodiment, the two positive electrode members 20 and the two negative electrode members 30 are alternately arranged on the surface of the strip separator 10. By doing so, the positive electrode member can be formed in such a state that the belt-like separator 10 is interposed between the positive electrode member 20 and the negative electrode member 30 only by bending the belt-like separator 10 from one end of the belt-like separator 10 and winding it in one direction. A structure in which 20 and the negative electrode member 30 are alternately positioned can be easily realized.
　なお、この発明の製造方法によれば、帯状セパレータ１０の長手方向に沿って正極部材２０と負極部材３０とが帯状セパレータ１０の表面上に配置され、帯状セパレータ１０の一方端部を中心として帯状セパレータ１０が折り曲げられて巻かれることによって、正極部材２０と負極部材３０との間に帯状セパレータ１０が介在した積層型の電池要素１が形成される。このようにして、高い生産性で、正極部材２０と負極部材３０との間に帯状セパレータ１０が介在した積層型の電池を実現することができる構造であるので、低コストで電池を製造可能である。また、この発明の電池は、安定した構造を有するので、製造物としての特性のバラツキが少なく、その結果、信頼性が高いという利点を有する。 According to the manufacturing method of the present invention, the positive electrode member 20 and the negative electrode member 30 are arranged on the surface of the strip separator 10 along the longitudinal direction of the strip separator 10, and the strip shape is centered on one end of the strip separator 10. When the separator 10 is bent and wound, the stacked battery element 1 in which the strip separator 10 is interposed between the positive electrode member 20 and the negative electrode member 30 is formed. In this way, the structure can realize a stacked battery in which the strip separator 10 is interposed between the positive electrode member 20 and the negative electrode member 30 with high productivity, so that the battery can be manufactured at low cost. is there. In addition, since the battery of the present invention has a stable structure, there is little variation in characteristics as a product, and as a result, there is an advantage that reliability is high.
　上記の実施形態では、製造された電池要素１をリチウムイオン二次電池の電池要素に適用した例を説明したが、リチウム二次電池、ポリマー二次電池などの電池要素に適用してもよい。 In the above embodiment, an example in which the manufactured battery element 1 is applied to a battery element of a lithium ion secondary battery has been described. However, the battery element 1 may be applied to a battery element such as a lithium secondary battery or a polymer secondary battery.
　帯状セパレータ１０としては、特に限定されるべきものではなく、従来から公知のものを用いることができる。なお、本発明においては、帯状セパレータ１０は、その名称によって限定されるべきものではなく、セパレータとしての機能（役割）を有するものであればよい。また、アルミナやジルコニアなどの無機材料を含有させた帯状セパレータ１０を用いてもよい。 The strip separator 10 is not particularly limited, and conventionally known strip separators can be used. In addition, in this invention, the strip | belt-shaped separator 10 should not be limited by the name, What is necessary is just to have a function (role) as a separator. Alternatively, a strip separator 10 containing an inorganic material such as alumina or zirconia may be used.
　正極部材２０を構成する正極活物質としては、コバルト酸リチウム複合酸化物（ＬｉＣｏＯ２）以外に、スピネル型のマンガン酸リチウム複合酸化物（ＬｉＭｎ２Ｏ４）、ニッケル酸リチウム複合酸化物（ＬｉＮｉＯ２）を用いてもよい。また、正極活物質としてＬｉＮｉｘＭｎｙＣｏｚＯ２（式中、ｘ、ｙ、ｚは０＜ｘ＜１、０＜ｙ＜１、０＜ｚ＜１、ｘ＋ｙ＋ｚ＝１を満たす数値である）、好ましくはＬｉＮｉ１／３Ｍｎ１／３Ｃｏ１／３Ｏ２といった３元系材料やＬｉＭｎｙＮｉ１－ｙＯ２、ＬｉＭｎｙＣｏ１－ｙＯ２、ＬｉＮｉｙＣｏ１－ｙＯ２（式中、ｙは０＜ｙ＜１を満たす数値である）といった２元系材料を用いてもよい。さらに、正極活物質は、これらの主材料を混合したものでもよい。正極活物質は、ＬｉＦｅＰＯ４といったオリビン系材料でもよい。 As the positive electrode active material constituting the positive electrode member 20, in addition to lithium cobaltate composite oxide (LiCoO 2 ), spinel type lithium manganate composite oxide (LiMn 2 O 4 ), lithium nickelate composite oxide (LiNiO 2). ) May be used. Further, LiNi x Mn y Co z O 2 (wherein, x, y, z are numerical values satisfying 0 <x <1, 0 <y <1, 0 <z <1, x + y + z = 1) as a positive electrode active material. ), preferably LiNi 1/3 Mn 1/3 Co 1/3 O 2, such as a ternary material or LiMn y Ni 1-y O 2 , LiMn y Co 1-y O 2, LiNi y Co 1-y O 2 A binary material such as (wherein y is a numerical value satisfying 0 <y <1) may be used. Further, the positive electrode active material may be a mixture of these main materials. The positive electrode active material may be an olivine-based material such as LiFePO 4 .
　負極部材３０を構成する負極活物質の炭素材料としては、グラファイトやハードカーボンなどが用いられる。また、負極活物質は、これらの主材料を混合したものでもよい。負極活物質はチタン酸リチウムのようなセラミックや合金系材料でもよい。 As the carbon material of the negative electrode active material constituting the negative electrode member 30, graphite, hard carbon or the like is used. The negative electrode active material may be a mixture of these main materials. The negative electrode active material may be a ceramic or alloy material such as lithium titanate.
　今回開示された実施の形態はすべての点で例示であって制限的なものではないと考慮されるべきである。本発明の範囲は以上の実施の形態ではなく、請求の範囲によって示され、請求の範囲と均等の意味および範囲内でのすべての修正や変形を含むものであることが意図される。 The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above embodiments but by the scope of claims, and is intended to include all modifications and variations within the meaning and scope equivalent to the scope of claims.
　この発明によれば、正極部材と負極部材の間に帯状セパレータを介在させた状態で正極部材と負極部材が交互に位置付けられる積層型の電池の構造を、高い生産性で、かつ、簡単なプロセスで実現することができるので、本発明は、リチウムイオン二次電池、リチウム二次電池、ポリマー二次電池などの二次電池において正極板と負極板の間にセパレータを介在させた状態で正極板と負極板が交互に位置付けられるように積層された積層型二次電池とその製造方法に適用することができる。 According to the present invention, the structure of the stacked battery in which the positive electrode member and the negative electrode member are alternately positioned with the strip separator interposed between the positive electrode member and the negative electrode member can be realized with a high productivity and a simple process. In the secondary battery such as a lithium ion secondary battery, a lithium secondary battery, or a polymer secondary battery, the present invention can be realized with a separator interposed between the positive electrode plate and the negative electrode plate. The present invention can be applied to a stacked secondary battery that is stacked so that plates are alternately positioned and a manufacturing method thereof.
　１：電池要素、１０：帯状セパレータ、２０：正極部材、３０：負極部材、１００：セパレータロール、２００：セパレータ巻き取り装置、３００：接着剤付与装置、４００：正負極部材吸引移動装置、１０００：電池製造装置。 1: battery element, 10: strip separator, 20: positive electrode member, 30: negative electrode member, 100: separator roll, 200: separator take-up device, 300: adhesive application device, 400: positive and negative electrode member suction transfer device, 1000: Battery manufacturing equipment.

Claims (8)

  1. 　帯状のセパレータの長手方向に沿って短冊状の正極部材と短冊状の負極部材とを前記帯状のセパレータの表面上に配置し、前記帯状のセパレータの一方端部から前記帯状のセパレータを折り曲げて巻き取ることによって、前記正極部材と前記負極部材との間に前記帯状のセパレータが介在した積層型の電池を形成する、電池の製造方法。 A strip-shaped positive electrode member and a strip-shaped negative electrode member are disposed on the surface of the strip-shaped separator along the longitudinal direction of the strip-shaped separator, and the strip-shaped separator is bent and wound from one end of the strip-shaped separator. A method of manufacturing a battery, comprising: forming a stacked battery in which the strip-shaped separator is interposed between the positive electrode member and the negative electrode member.
  2. 　前記正極部材と前記負極部材とを前記帯状のセパレータの一方側の表面のみに配置し、前記帯状のセパレータの一方端部から前記帯状のセパレータを折り曲げて一方向に巻き取ることによって、前記正極部材と前記負極部材との間に前記帯状のセパレータが介在した積層型の電池を形成する、請求項１に記載の電池の製造方法。 The positive electrode member and the negative electrode member are disposed only on the surface of one side of the strip-shaped separator, and the strip-shaped separator is bent from one end of the strip-shaped separator and wound in one direction. The method for manufacturing a battery according to claim 1, wherein a stacked battery in which the strip-shaped separator is interposed between the electrode and the negative electrode member is formed.
  3. 　前記正極部材と前記負極部材とを複数組、前記帯状のセパレータの表面上に予め配置した状態で、前記帯状のセパレータの一方端部から前記帯状のセパレータを折り曲げて巻き取ることによって、前記正極部材と前記負極部材との間に前記帯状のセパレータが介在した積層型の電池を形成する、請求項１または請求項２に記載の電池の製造方法。 A plurality of sets of the positive electrode member and the negative electrode member are arranged in advance on the surface of the strip-shaped separator, and the positive electrode member is formed by bending and winding the strip-shaped separator from one end of the strip-shaped separator. The manufacturing method of the battery of Claim 1 or Claim 2 which forms the laminated battery in which the said strip | belt-shaped separator interposed between the said and the negative electrode member.
  4. 　前記帯状のセパレータの一方端部から前記帯状のセパレータを連続して折り曲げて巻き取る、請求項３に記載の電池の製造方法。 The battery manufacturing method according to claim 3, wherein the strip-shaped separator is continuously bent and wound from one end of the strip-shaped separator.
  5. 　二つの前記正極部材と二つの前記負極部材とを交互に前記帯状のセパレータの表面上に配置する、請求項１から請求項３までのいずれか１項に記載の電池の製造方法。 The method for manufacturing a battery according to any one of claims 1 to 3, wherein the two positive electrode members and the two negative electrode members are alternately arranged on the surface of the strip-shaped separator.
  6. 　帯状のセパレータの長手方向に沿って正極部材と負極部材とが前記帯状のセパレータの表面上に配置され、前記帯状のセパレータの一方端部を中心として前記帯状のセパレータが折り曲げられて巻かれることによって、前記正極部材と前記負極部材との間に前記帯状のセパレータが介在した積層型の電池が形成されている、電池。 A positive electrode member and a negative electrode member are disposed on the surface of the strip-shaped separator along the longitudinal direction of the strip-shaped separator, and the strip-shaped separator is bent and wound around one end of the strip-shaped separator. A battery in which a laminated battery in which the strip-shaped separator is interposed between the positive electrode member and the negative electrode member is formed.
  7. 　前記正極部材と前記負極部材とが前記帯状のセパレータの一方側の表面のみに配置されている、請求項６に記載の電池。 The battery according to claim 6, wherein the positive electrode member and the negative electrode member are arranged only on one surface of the strip-shaped separator.
  8. 　二つの前記正極部材と二つの前記負極部材とが交互に前記帯状のセパレータの表面上に配置されている、請求項６または請求項７に記載の電池。 The battery according to claim 6 or 7, wherein the two positive electrode members and the two negative electrode members are alternately arranged on the surface of the strip-shaped separator.
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