CN113795939B - Electrode assembly and battery cell - Google Patents
Electrode assembly and battery cell Download PDFInfo
- Publication number
- CN113795939B CN113795939B CN202080034556.6A CN202080034556A CN113795939B CN 113795939 B CN113795939 B CN 113795939B CN 202080034556 A CN202080034556 A CN 202080034556A CN 113795939 B CN113795939 B CN 113795939B
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- pole piece
- battery cell
- tab
- cell unit
- electrode assembly
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- 239000011888 foil Substances 0.000 claims description 34
- 239000003792 electrolyte Substances 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 239000012466 permeate Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 238000004804 winding Methods 0.000 abstract description 6
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000000926 separation method Methods 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The application discloses an electrode assembly and a battery cell, comprising: a first pole piece; the polarity of the second pole piece is opposite to that of the first pole piece; the isolating film is arranged between the first pole piece and the second pole piece; after the first pole piece, the second pole piece and the isolating film are overlapped, winding from two ends to the middle to form a first battery cell unit and a second battery cell unit; the first electrode lug is arranged on the first pole piece and extends outwards of the first battery cell unit; and the second lug is arranged on the second pole piece and extends to the outside of the second battery cell unit. The electrode assembly and the battery cell are wound from two ends to the middle through the overlapped first pole piece, second pole piece and isolating film to form a first battery cell unit and a second battery cell unit, and the first battery cell unit and the second battery cell unit share the first electrode lug and the second electrode lug, so that the energy density, the multiplying power performance and the charging and discharging speed are improved.
Description
Technical Field
The present application relates to the field of batteries, and more particularly, to an electrode assembly and a battery cell including the same.
Background
Currently, foldable flexible devices are becoming research hot spots, and conventional battery structures are limited by cube structures, so that the application of the flexible devices cannot be satisfied. At present, one or a plurality of bare cells are applied to a flexible device, but a plurality of tabs are required to be led out from the plurality of bare cells, so that the infiltration of electrolyte is not facilitated, the polarization of the battery cells is larger, and the rate performance and the charge and discharge speed of the battery cells are further reduced.
Disclosure of Invention
In view of the foregoing, it is necessary to provide an electrode assembly and a battery cell that are applied to a flexible device and have good rate performance.
An embodiment of the present application provides an electrode assembly including:
a first pole piece;
a second pole piece having a polarity opposite to the polarity of the first pole piece; and
The isolating film is arranged between the first pole piece and the second pole piece;
The first pole piece, the second pole piece and the isolating film are overlapped and then wound from two ends to the middle to form a first battery cell unit and a second battery cell unit;
the electrode assembly further includes:
the first electrode lug is arranged on the first pole piece and extends outwards of the first battery cell unit; and
And the second lug is arranged on the second pole piece and extends outwards of the second battery cell unit.
According to some embodiments of the application, the spacing L between the symmetry axis of the first tab or the second tab parallel to the first direction and the symmetry axis of the first pole piece parallel to the first direction satisfies: l is more than or equal to 0 and less than or equal to W/2-z/2, wherein z is the width of the first tab or the second tab, W is the width of the first pole piece or the second pole piece, and the first direction is the length direction of the first pole piece.
According to some embodiments of the application, the extending direction of the first tab is parallel to the direction of the first cell away from the second cell; the extending direction of the second electrode lug is parallel to the direction of the second battery cell unit deviating from the first battery cell unit.
According to some embodiments of the application, the first pole piece comprises:
a first current collector including opposite first and second faces;
A first active layer disposed on the first face and the second face, respectively;
the first surface is provided with a first empty foil area, and the first tab is arranged on a first current collector exposed out of the first empty foil area;
The second pole piece includes:
a second current collector including opposed third and fourth faces;
Second active layers respectively disposed on the third surface and the fourth surface;
And a second empty foil area is arranged on the third surface, and the second lug is arranged on a second current collector exposed out of the second empty foil area.
According to some embodiments of the application, a portion of the first tab is welded to the first current collector, and a welded region is proximate to the first active layer; a portion of the second tab is welded to the second current collector with a welded area proximate to the second active layer.
According to some embodiments of the application, a plurality of third empty foil areas exposing the first current collector are arranged on the first surface at intervals; a plurality of fourth empty foil areas exposing the second current collector are arranged on the third surface at intervals; the third empty foil area and the fourth empty foil area are located in the connecting area of the first battery cell unit and the second battery cell unit, and the third empty foil area and the fourth empty foil area are correspondingly arranged and located on two opposite sides of the first pole piece and the second pole piece.
According to some embodiments of the application, the barrier film comprises a first barrier film, a second barrier film, and a third barrier film; the first isolating film, the first pole piece, the second isolating film, the second pole piece and the third isolating film are sequentially overlapped; and the first isolating films and the second isolating films are arranged in a staggered manner, and are in projection contact or partially overlapped, so that the first pole piece and the second pole piece in the first cell unit and the second cell unit are isolated.
According to some embodiments of the application, the first tab is made of nickel, and the second tab is made of aluminum.
The application also provides a battery cell, which comprises an air bag and the electrode assembly, wherein the electrode assembly is arranged in the air bag, and the first electrode lug and the second electrode lug extend out of the air bag.
According to some embodiments of the application, the cell further comprises an electrolyte that permeates into the first cell unit and the second cell unit in a second direction, the second direction being parallel to a width direction of the first pole piece.
The electrode assembly and the battery cell are wound from two ends to the middle through the overlapped first pole piece, second pole piece and isolating film to form a first battery cell unit and a second battery cell unit, and the first battery cell unit and the second battery cell unit share the first tab and the second tab, so that the energy density, the multiplying power performance and the charging and discharging speed are improved.
Drawings
Fig. 1 is a schematic structural diagram of a battery cell according to an embodiment of the application.
Fig. 2 is a schematic structural view of the battery cell shown in fig. 1 when the air bag is opened.
Fig. 3 is a schematic structural diagram of the first and second battery cells formed by winding the battery cells shown in fig. 1.
Fig. 4 is a schematic structural view of an electrode assembly in the battery cell shown in fig. 1 in another embodiment.
Fig. 5 is a schematic structural diagram of a first pole piece of a battery cell according to an embodiment of the present application.
Fig. 6 is a schematic structural diagram of the first pole piece shown in fig. 1 with a first tab.
Fig. 7 is a schematic structural diagram of a second pole piece of a battery cell according to an embodiment of the present application.
Fig. 8 is a schematic structural diagram of the battery cell shown in fig. 1 when the first pole piece, the second pole piece and the isolation film are stacked.
Fig. 9 is a winding schematic diagram of the first pole piece, the second pole piece, and the separator in the cell shown in fig. 8.
Fig. 10 is a schematic structural diagram of a junction area of a first cell unit and a second cell unit in the cell shown in fig. 2.
Description of the main reference signs
Cell 200
Air bag 201
Electrode assemblies 100, 100a
First pole piece 10
Symmetry axis 1001
First current collector 11
First face 111
First empty foil region 1111
Third empty foil region 1113
Second face 113
First active layer 13
Second pole piece 20
Second current collector 21
Third face 211
Second empty foil region 2111
Fourth empty foil region 2113
Fourth face 213
Second active layer 23
Separator 30
First separator 31
Second isolation film 33
Third separation film 35
First tab 40
Symmetry axis 401
First limit position 403
Second extreme position 405
Welded area 4001
Second lug 50
First cell unit 101
Second cell unit 103
First direction X
Second direction Y
Third direction Z
The application will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Some embodiments of the present application provide an electrode assembly including:
a first pole piece;
a second pole piece having a polarity opposite to the polarity of the first pole piece; and
The isolating film is arranged between the first pole piece and the second pole piece;
The first pole piece, the second pole piece and the isolating film are overlapped and then wound from two ends to the middle to form a first battery cell unit and a second battery cell unit;
the first electrode lug is arranged on the first pole piece and extends outwards of the first battery cell unit; and
And the second lug is arranged on the second pole piece and extends outwards of the second battery cell unit.
The electrode assembly is wound from two ends to the middle through the overlapped first pole piece, the second pole piece and the isolating film to form the first battery cell unit and the second battery cell unit, and the first battery cell unit and the second battery cell unit share the first electrode lug and the second electrode lug, so that the energy density, the multiplying power performance and the charging and discharging speed are improved.
Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, fig. 2 and fig. 3, an embodiment of the application provides a battery cell 200. The battery cell 200 includes an air pouch 201 and an electrode assembly 100. The electrode assembly 100 is disposed within the air pouch 201. The electrode assembly 100 includes a first electrode tab 10, a second electrode tab 20, a separator 30, a first tab 40, and a second tab 50. The polarities of the first pole piece 10 and the second pole piece 20 are opposite. For example, the polarity of the first pole piece 10 is anode, and the polarity of the second pole piece 20 is cathode. The first tab 40 is made of nickel, and the second tab 50 is made of aluminum.
The separation film 30 is disposed between the first pole piece 10 and the second pole piece 20. After the first pole piece 10, the second pole piece 20 and the isolating film 30 are stacked, the first and second battery cells 101 and 103 are formed by winding from two ends to the middle. As shown in fig. 1, both ends are wound clockwise, but not limited thereto. For example, in other embodiments, the two ends may also be wrapped counter-clockwise at the same time. The first tab 40 is disposed on the first pole piece 10 and extends to the outside of the first battery cell unit 101. The second tab 50 is disposed on the second pole piece 20 and extends to the outside of the second battery cell 103. The first tab 40 and the second tab 50 extend out of the air bag 201.
The electrode assembly 100 and the battery cell 200 are formed by winding two units of the first battery cell unit 101 and the second battery cell unit 103, which form a bare battery cell, and the electrode assembly 100 is provided with only one first tab 40 and one second tab 50, and the two units forming the bare battery cell share one first tab 40 and one second tab 50, so that the rate performance and the charge and discharge speed are improved.
Referring to fig. 5 and 6, for clarity of the following description, a first direction X is defined as a length direction of the first pole piece 10, a second direction Y is a width direction of the first pole piece 10, and a third direction Z is a thickness direction of the first pole piece 10.
Referring to fig. 3, the extending direction of the first tab 40 is parallel to the direction of the first cell 101 away from the second cell 103. The extending direction of the second tab 50 is parallel to the direction of the second cell 103 away from the first cell 101, but is not limited thereto. For example, as shown in fig. 4, in another embodiment, the extending directions of the first tab 40 and the second tab 50 of the electrode assembly 100a are parallel to the third direction Z, respectively.
Referring to fig. 5, 6 and 7, the first pole piece 10 includes a first current collector 11 and a first active layer 13. The first current collector 11 includes a first face 111 and a second face 113 opposite in the third direction Z. The first active layer 13 is disposed on the first face 111 and the second face 113, respectively. The second electrode sheet 20 includes a second current collector 21 and a second active layer 23. The second current collector 21 includes a third face 211 and a fourth face 213 opposite in the third direction Z. The second active layer 23 is provided on the third surface 211 and the fourth surface 213, respectively. The polarity of the first active layer 13 and the second active layer 23 are opposite. For example, the first active layer 13 is an anode active layer, and the second active layer 23 is a cathode active layer.
Referring to fig. 8 and 9, the separation film 30 includes a first separation film 31, a second separation film 33, and a third separation film 35. The first separator 31, the first pole piece 10, the second separator 33, the second pole piece 20, and the third separator 35 are stacked in this order. The first isolation films 31 and the second isolation films 33 are staggered, in projection contact or partially overlap, so that the first pole piece 10 and the second pole piece 20 in the first cell unit 101 and the second cell unit 103 are isolated. The second surface 113 of the first pole piece 10 and the fourth surface 213 of the second pole piece 20 are disposed opposite to each other.
Referring to fig. 5, 6 and 7, the first surface 111 is provided with a first empty foil area 1111. The first tab 40 is disposed on the first current collector 11 exposed from the first empty foil region 1111, as shown in fig. 6. The third surface 211 is provided with a second empty foil region 2111, and the second tab 50 is provided on the second current collector 21 exposed from the second empty foil region 2111. A portion of the first tab 40 is welded to the first current collector 11, and a welding area 4001 of the first tab 40 is adjacent to the first active layer 13. A portion of the second tab 50 is welded to the second current collector 21, and a welding area (not shown) of the second tab 50 is adjacent to the second active layer 23. It will be appreciated that in other embodiments, the welding area of the first tab 40 or the second tab 50 may be located at other positions, as long as the first tab 40 and the second tab 50 are convenient to extend outside the battery cell 200.
Referring to fig. 6, the position of the first tab 40 along the second direction Y on the first current collector 11 is set according to the connection positions of the anode and the cathode of the battery cell 200 and the external element. The distance L between the symmetry axis 401 of the first tab 40 parallel to the first direction X and the symmetry axis 1001 of the first pole piece 10 preferably satisfies the following: and L is more than or equal to 0 and less than or equal to (W/2-z/2), wherein z is the width of the first tab, and W is the width of the first pole piece 10. The first and second extreme positions 403 and 405 of the symmetry axis 401 of the first tab 40 are spaced from the symmetry axis 1001 of the first pole piece 10 by a distance W/2-z/2. Similarly, the spacing L between the second lug 50 and the symmetry axis 1001 of the first pole piece 10 in an axis of symmetry (not shown) parallel to the first direction X preferably satisfies: l is more than or equal to 0 and less than or equal to (W/2-z/2).
According to one embodiment of the application, the width z of the first tab is selected in the range of 1-15mm; the width W of the first pole piece is in the optional range of 20-200mm. Preferably, the width z of the first tab ranges from 5mm to 6mm; the width W of the first pole piece is selected to be 50-100mm.
Further, when the distance l=0, the first tab 40 is located at the middle symmetry of the first cell unit 101 in the second direction Y, and the second tab 50 is located at the middle symmetry of the second cell unit 103 in the second direction Y, so as to further improve the charge-discharge speed and the rate capability of the battery cell 200.
Referring to fig. 5, 7 and 10, a plurality of third empty foil areas 1113 exposing the first current collector 11 are disposed on the first surface 111 at intervals. A plurality of fourth empty foil areas 2113 exposing the second current collector 21 are provided at intervals on the third surface 211. The third empty foil region 1113 and the fourth empty foil region 2113 are located at the junction area of the first cell unit 101 and the second cell unit 103, so that the size of the first cell unit 101 and the second cell unit 103 in the first direction X is reduced at the junction area. The third empty foil area 1113 and the fourth empty foil area 2113 are correspondingly disposed and located at two opposite sides of the first pole piece 10 and the second pole piece 20, so that the first electric core unit 101 and the second electric core unit 103 can realize energy exchange, and further the electric core 200 can realize energy exchange while the size of the electric core 200 in the first direction X is reduced, thereby improving the energy density of the electric core 200.
Referring to fig. 2, the battery cell 200 further includes an electrolyte (not shown). The electrolyte permeates into the first cell unit 101 and the second cell unit 103 along the second direction Y, and the electrolyte permeates from the winding surface of the cell 200, so that the permeability of the electrolyte is improved.
The electrode assembly 100 and the battery cell 200 are wound from both ends to the middle by the stacked first electrode sheet 10, second electrode sheet 20 and separator 30 to form a first battery cell unit 101 and a second battery cell unit 103. And the first battery cell unit 101 and the second battery cell unit 103 share the first tab 40 and the second tab 50, so that the energy density, the rate capability and the charge and discharge speed are improved.
The above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and substance of the technical solution of the present application.
Claims (10)
1. An electrode assembly, comprising:
a first pole piece;
a second pole piece having a polarity opposite to the polarity of the first pole piece; and
The isolating film is arranged between the first pole piece and the second pole piece; it is characterized in that the method comprises the steps of,
The first pole piece, the second pole piece and the isolating film are overlapped and then wound from two ends to the middle to form a first battery cell unit and a second battery cell unit;
the electrode assembly further includes:
the first tab is arranged on the first pole piece and extends out of the first battery cell unit; and
The second electrode lug is arranged on the second pole piece and extends outwards of the second battery cell unit;
The first battery cell unit and the second battery cell unit share one first tab and one second tab.
2. The electrode assembly of claim 1, wherein: the distance L between the symmetry axis of the first tab or the second tab parallel to the first direction and the symmetry axis of the first pole piece parallel to the first direction is as follows: and L is more than or equal to 0 and less than or equal to (W/2-z/2), wherein z is the width of the first tab or the second tab, W is the width of the first pole piece or the second pole piece, and the first direction is the length direction of the first pole piece.
3. The electrode assembly of claim 1, wherein the direction of extension of the first tab is parallel to the direction of the first cell away from the second cell; the extending direction of the second electrode lug is parallel to the direction of the second battery cell unit deviating from the first battery cell unit.
4. The electrode assembly of claim 1, wherein,
The first pole piece comprises:
a first current collector including opposite first and second faces;
A first active layer disposed on the first face and the second face, respectively;
the first surface is provided with a first empty foil area, and the first tab is arranged on a first current collector exposed out of the first empty foil area;
The second pole piece includes:
a second current collector including opposed third and fourth faces;
Second active layers respectively disposed on the third surface and the fourth surface;
And a second empty foil area is arranged on the third surface, and the second lug is arranged on a second current collector exposed out of the second empty foil area.
5. The electrode assembly of claim 4, wherein: a part of the first tab is welded on the first current collector, and a welding area is close to the first active layer; a portion of the second tab is welded to the second current collector with a welded area proximate to the second active layer.
6. The electrode assembly of claim 4, wherein: a plurality of third empty foil areas exposing the first current collector are arranged on the first surface at intervals; a plurality of fourth empty foil areas exposing the second current collector are arranged on the third surface at intervals; the third empty foil area and the fourth empty foil area are located in the connecting area of the first battery cell unit and the second battery cell unit, and the third empty foil area and the fourth empty foil area are correspondingly arranged and located on two opposite sides of the first pole piece and the second pole piece.
7. The electrode assembly of claim 1, wherein: the isolating film comprises a first isolating film, a second isolating film and a third isolating film; the first isolating film, the first pole piece, the second isolating film, the second pole piece and the third isolating film are sequentially overlapped; and the first isolating films and the second isolating films are arranged in a staggered manner, and are in projection contact or partially overlapped, so that the first pole piece and the second pole piece in the first cell unit and the second cell unit are isolated.
8. The electrode assembly of claim 1, wherein: the first tab is made of nickel, and the second tab is made of aluminum.
9. A cell comprising an air bag and an electrode assembly disposed within the air bag, characterized in that: the electrode assembly is the electrode assembly according to any one of claims 1 to 8, and the first tab and the second tab protrude outside the air pouch.
10. The cell of claim 9, wherein: the battery cell also comprises electrolyte, wherein the electrolyte permeates into the first battery cell unit and the second battery cell unit along a second direction, and the second direction is parallel to the width direction of the first pole piece.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/082261 WO2021195910A1 (en) | 2020-03-31 | 2020-03-31 | Electrode assembly and battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113795939A CN113795939A (en) | 2021-12-14 |
| CN113795939B true CN113795939B (en) | 2024-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080034556.6A Active CN113795939B (en) | 2020-03-31 | 2020-03-31 | Electrode assembly and battery cell |
Country Status (2)
| Country | Link |
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| CN (1) | CN113795939B (en) |
| WO (1) | WO2021195910A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114335662B (en) * | 2021-12-16 | 2024-04-09 | 瑞浦兰钧能源股份有限公司 | Method and structure for welding lithium ion pole piece and battery cell |
| CN115275460B (en) * | 2022-08-30 | 2024-08-20 | 宁德新能源科技有限公司 | Battery cell, battery and electric equipment |
| CN117239361B (en) * | 2023-11-10 | 2024-09-27 | 瑞浦兰钧能源股份有限公司 | Battery cell, battery pole piece and preparation method of battery |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207441856U (en) * | 2017-09-05 | 2018-06-01 | 宁德时代新能源科技股份有限公司 | Pole piece and electrode assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6617074B1 (en) * | 1999-06-30 | 2003-09-09 | Mitsubishi Materials Corporation | Lithium ion polymer secondary battery and gelatinous polymer electrolyte for sheet battery |
| CN101640286B (en) * | 2008-08-01 | 2011-12-07 | 上海比亚迪有限公司 | Core of spirally wound lithium battery and spirally wound lithium battery |
| KR101292199B1 (en) * | 2010-04-01 | 2013-08-05 | 주식회사 엘지화학 | Electrode Assembly of Novel Structure and Process for Preparation of the Same |
| CN203574066U (en) * | 2013-12-03 | 2014-04-30 | 宁德新能源科技有限公司 | Lithium ion battery with multi-core structure |
| CN205355186U (en) * | 2015-12-29 | 2016-06-29 | 宁德新能源科技有限公司 | Battery in winding structure |
| CN106486704A (en) * | 2016-11-25 | 2017-03-08 | 南通宁远自动化科技有限公司 | A kind of takeup type high-voltage battery |
| CN206401455U (en) * | 2016-12-27 | 2017-08-11 | 宁德新能源科技有限公司 | A kind of takeup type battery core |
| CN206585017U (en) * | 2016-12-27 | 2017-10-24 | 宁德新能源科技有限公司 | A kind of takeup type battery core |
| CN207818739U (en) * | 2018-02-08 | 2018-09-04 | 宁德时代新能源科技股份有限公司 | Electrode assembly |
| CN110783638B (en) * | 2019-09-23 | 2022-10-11 | 合肥国轩高科动力能源有限公司 | Winding stacked battery cell and preparation method thereof |
-
2020
- 2020-03-31 WO PCT/CN2020/082261 patent/WO2021195910A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207441856U (en) * | 2017-09-05 | 2018-06-01 | 宁德时代新能源科技股份有限公司 | Pole piece and electrode assembly |
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| Publication number | Publication date |
|---|---|
| WO2021195910A1 (en) | 2021-10-07 |
| CN113795939A (en) | 2021-12-14 |
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