JPH07326336A - Secondary battery - Google Patents
Secondary batteryInfo
- Publication number
- JPH07326336A JPH07326336A JP6119130A JP11913094A JPH07326336A JP H07326336 A JPH07326336 A JP H07326336A JP 6119130 A JP6119130 A JP 6119130A JP 11913094 A JP11913094 A JP 11913094A JP H07326336 A JPH07326336 A JP H07326336A
- Authority
- JP
- Japan
- Prior art keywords
- negative electrode
- positive electrode
- secondary battery
- current collector
- lead
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は電気自動車等に使用され
る電源装置に使用して好適な二次電池に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a secondary battery suitable for use in a power supply device used in electric vehicles and the like.
【０００２】[0002]
【従来の技術】近年、電気自動車等で使用する高エネル
ギー密度の二次電池が要求されている。この高エネルギ
ー密度が達成出来る二次電池として、リチウムあるいは
リチウム合金を用いた非水電解液二次電池であるリチウ
ムイオン二次電池が提案されている。2. Description of the Related Art In recent years, high energy density secondary batteries for use in electric vehicles and the like have been required. As a secondary battery that can achieve this high energy density, a lithium ion secondary battery, which is a non-aqueous electrolyte secondary battery using lithium or a lithium alloy, has been proposed.
【０００３】この従来のリチウムイオン二次電池につき
図４及び図５を参照して説明する。図４において、１０
は例えば厚さ３００μｍのステンレス板より成る横方向
の長さが略３００ｍｍ、縦方向の長さが略１００ｍｍ、
厚さが２５ｍｍの密閉型の単電池の偏平角型電池容器を
示し、この偏平角型電池容器１０内に５１枚の正電極板
２及び５２枚の負電極板３をセパレータ８を介して交互
に積層した積層体を収納する。This conventional lithium ion secondary battery will be described with reference to FIGS. 4 and 5. In FIG. 4, 10
Is, for example, a 300 μm-thick stainless steel plate having a horizontal length of approximately 300 mm and a vertical length of approximately 100 mm.
A flat rectangular battery container of a sealed type single cell having a thickness of 25 mm is shown. In this flat rectangular battery container 10, 51 positive electrode plates 2 and 52 negative electrode plates 3 are alternately arranged via a separator 8. The stacked body that is stacked on top is stored.
【０００４】この正電極板２としては図４、図５に示す
如く矩形状の厚さが略２０μｍのアルミＡｌ箔より成る
集電体５の両面にリチウムＬｉと遷移金属の複合酸化物
例えばＬｉＣｏＯ2 を正極活物質４として被着したもの
である。As the positive electrode plate 2, as shown in FIGS. 4 and 5, a composite oxide of lithium Li and a transition metal such as LiCoO 2 is formed on both sides of a current collector 5 made of an aluminum Al foil having a rectangular shape and a thickness of about 20 μm. 2 is deposited as the positive electrode active material 4.
【０００５】また負電極板３としては図４、図５に示す
如く矩形状の厚さが略１０μｍの銅Ｃｕ箔（又はニッケ
ルＮｉ箔）より成る集電体７の両面にリチウムＬｉをド
ープ、脱ドープ可能なカーボン例えばグラファイト構造
を有する炭素や難黒鉛化炭素材料等の炭素Ｃを負極活物
質６として被着したものである。As the negative electrode plate 3, as shown in FIGS. 4 and 5, lithium Li is doped on both sides of a current collector 7 made of a copper Cu foil (or nickel Ni foil) having a rectangular thickness of about 10 μm. It is a carbon that can be dedoped, for example, carbon having a graphite structure or carbon C such as a non-graphitizable carbon material is deposited as the negative electrode active material 6.
【０００６】またセパレータ８としては矩形状の厚さ５
０μｍの微多孔性ポリエチレンフィルム、ポリプロピレ
ンフィルム等を使用する。この場合、正電極板２、負電
極板３及びセパレータ８の形状としては、図４に示す如
くセパレータ８の形状を最大とし、負電極板３及び正電
極板２の形状を順次小さくする如くする。The separator 8 has a rectangular thickness 5
A 0 μm microporous polyethylene film, polypropylene film or the like is used. In this case, as for the shapes of the positive electrode plate 2, the negative electrode plate 3 and the separator 8, the shape of the separator 8 is maximized as shown in FIG. 4, and the shapes of the negative electrode plate 3 and the positive electrode plate 2 are successively reduced. .
【０００７】またこの密閉型の偏平角型電池容器１０内
にプロピレンカーボネート、ジエチルカーボネートの混
合溶媒の中にＬｉＰＦ6 を１モル／１の割合で溶解した
有機電解液９を注入し、この正極活物質４及び負極活物
質６間にこの有機電解液９を充填する如くする。このリ
チウムイオン二次電池の化学反応は化１に示す如くであ
る。Further, an organic electrolytic solution 9 in which LiPF 6 was dissolved in a mixed solvent of propylene carbonate and diethyl carbonate at a ratio of 1 mol / 1 was injected into the closed flat rectangular battery container 10 to activate the positive electrode. The organic electrolyte 9 is filled between the substance 4 and the negative electrode active material 6. The chemical reaction of this lithium-ion secondary battery is as shown in Chemical formula 1.
【０００８】[0008]
【化１】 [Chemical 1]
【０００９】また正電極板２及び負電極板３の夫々の上
部にリード部としての舌片２ａ及び３ａを夫々設け、こ
の正電極板２のリード部としての舌片２ａをこの偏平角
型電池容器１０の内部でネジ止めにより互いに接続し、
この接続点を偏平角型電池容器１０の外部上側壁に設け
た外部正極端子１１に接続すると共に負電極板３のリー
ド部としての舌片３ａをこの偏平角型電池容器１０の内
部でネジ止めにより互いに接続し、この接続点をこの偏
平角型電池容器１０の外部上側壁に設けた外部負極端子
１２に接続する如くする。Further, tongues 2a and 3a as lead portions are provided on the upper portions of the positive electrode plate 2 and the negative electrode plate 3, respectively, and the tongue 2a as lead portions of the positive electrode plate 2 is provided to the flat rectangular battery. Connected to each other by screwing inside the container 10,
This connection point is connected to the external positive electrode terminal 11 provided on the outer upper side wall of the flat rectangular battery container 10, and the tongue piece 3a as the lead portion of the negative electrode plate 3 is screwed inside the flat rectangular battery container 10. And the connection point is connected to the external negative electrode terminal 12 provided on the outer upper side wall of the flat rectangular battery container 10.
【００１０】図４において、１３はこの密閉型の偏平角
型電池容器１０の内圧が所定値より高くなったときに、
この内部の気体を抜く安全弁である。In FIG. 4, reference numeral 13 indicates when the internal pressure of the closed flat rectangular battery container 10 becomes higher than a predetermined value.
This is a safety valve that releases the gas inside.
【００１１】斯るリチウムイオン二次電池によれば例え
ば平均電圧が３．５Ｖで５０Ａｈのものを得ることがで
きる。According to such a lithium ion secondary battery, it is possible to obtain, for example, one having an average voltage of 3.5 V and 50 Ah.
【００１２】[0012]
【発明が解決しようとする課題】然しながら、斯る従来
の偏平角型のリチウムイオン二次電池においては、図４
に示す如く５１枚の正電極板２のリード部としての舌片
２ａ同志及び５２枚の負電極板３のリード部としての舌
片３ａ同志を夫々ネジ止めにより互いに接続していたの
で、この正電極板２の舌片２ａ同志間及び負電極板３の
舌片３ａ同志間に電解液が毛細管現象によりしみ込み、
このリチウムイオン二次電池の内部抵抗の値が増大し、
例えば１０ｍΩ〜２０ｍΩとなる不都合があると共にこ
の内部抵抗値がバラツク不都合があった。However, in such a conventional flat-angle type lithium ion secondary battery, as shown in FIG.
As shown in FIG. 5, the tongues 2a serving as the lead portions of the 51 positive electrode plates 2 and the tongues 3a serving as the lead portions of the 52 negative electrode plates 3 are connected to each other by screwing, respectively. The electrolyte penetrates between the tongues 2a of the electrode plate 2 and between the tongues 3a of the negative electrode plate 3 due to the capillary phenomenon,
The internal resistance of this lithium-ion secondary battery increases,
For example, there is a problem that the resistance value is 10 mΩ to 20 mΩ and the internal resistance value varies.
【００１３】従って、大電流を流したときにはこの内部
抵抗により発熱が生じ、重負荷特性が悪く、放電容量も
少なくなる不都合があった。またこのリチウムイオン二
次電池の内部抵抗の値が比較的大きいため、０℃以下の
低温特性が悪い不都合があった。Therefore, when a large current is applied, heat is generated by this internal resistance, resulting in poor heavy load characteristics and reduced discharge capacity. Further, since the internal resistance value of this lithium ion secondary battery is relatively large, there is a disadvantage that the low temperature characteristics of 0 ° C. or lower are poor.
【００１４】更に、このリチウムイオン二次電池におい
て、この内部抵抗値が比較的大きいので充電時にも充電
損失が大きく充電効率が低下する不都合があった。Further, in the lithium ion secondary battery, since the internal resistance value is relatively large, there is a disadvantage that charging loss is large even during charging and charging efficiency is lowered.
【００１５】本発明は斯る点に鑑み、上述の如き二次電
池の内部抵抗値を小さくすることを目的とする。In view of the above point, the present invention aims to reduce the internal resistance value of the secondary battery as described above.
【００１６】[0016]
【課題を解決するための手段】本発明二次電池は例えば
図１，図２に示す如く、正極集電体５に正極活物質４が
被着された正電極板２と、負極集電体７に負極活物質６
が被着された負電極板３とがセパレータ８ａを介して交
互に相対向して複数枚重ねられて成る二次電池におい
て、この正極集電体５同志及び負極集電体７同志を夫々
溶接手段２０により溶接接続したものである。The secondary battery of the present invention comprises a positive electrode plate 2 having a positive electrode current collector 5 coated with a positive electrode active material 4, and a negative electrode current collector, as shown in FIGS. Negative electrode active material 6
In a secondary battery in which a plurality of negative electrode plates 3 to which are attached are alternately faced to each other via a separator 8a, the positive electrode current collector 5 and the negative electrode current collector 7 are welded to each other. It is welded and connected by means 20.
【００１７】本発明二次電池は例えば図１，図２に示す
如く、上述において正極集電体５同志と外部正極端子１
１に一体構成の正極リード体１１ａとを溶接手段２０に
より溶接接続すると共に、この負極集電体７同志と外部
負極端子１２に一体構成の負極リード体１２ａとを溶接
手段２０により溶接接続したものである。The secondary battery of the present invention is, for example, as shown in FIGS. 1 and 2, in the above, the positive electrode current collector 5 and the external positive electrode terminal 1.
1 and the positive electrode lead body 11a integrally formed by welding with the welding means 20, and the negative electrode current collector 7 and the negative electrode lead body 12a integrally formed with the external negative electrode terminal 12 by the welding means 20. Is.
【００１８】また本発明二次電池は例えば図１，図２に
示す如く上述において、この溶接手段２０が超音波溶接
装置であるものである。In the secondary battery of the present invention, the welding means 20 is an ultrasonic welding device in the above description as shown in FIGS. 1 and 2, for example.
【００１９】[0019]
【作用】本発明に依れば正極集電体５同志及び負極集電
体７同志を夫々溶接接続しているので、この正極集電体
５同志及び負極集電体７同志の夫々の溶接接続部には毛
細管現象によっても電解液がしみ込むことがなく、内部
抵抗値が増大することがない。According to the present invention, the positive electrode current collector 5 and the negative electrode current collector 7 are welded to each other. Therefore, the positive electrode current collector 5 and the negative electrode current collector 7 are welded to each other. The electrolytic solution does not soak into the portion due to the capillary phenomenon, and the internal resistance value does not increase.
【００２０】[0020]
【実施例】以下図面を参照して本発明二次電池の一実施
例につき説明しよう。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the secondary battery of the present invention will be described below with reference to the drawings.
【００２１】図１、図２において、１０は例えば厚さ３
００μｍのステンレス板より成る横方向の長さが略３０
０ｍｍ、縦方向の長さが略１００ｍｍ、厚さが略２５ｍ
ｍの密閉型の単電池の偏平角型電池容器を示し、この偏
平角型電池容器１０内に５１枚の正電極板２及び５２枚
の負電極板３をセパレータ８ａを介して交互に積層した
積層体１４を収納する如くする。In FIGS. 1 and 2, reference numeral 10 denotes, for example, a thickness 3
The horizontal length of the stainless steel plate of 00μm is about 30
0 mm, vertical length is about 100 mm, thickness is about 25 m
1 shows a flat rectangular battery container of a closed type single battery of m. In this flat rectangular battery container 10, 51 positive electrode plates 2 and 52 negative electrode plates 3 are alternately laminated via a separator 8a. The stack 14 is stored.
【００２２】この正電極板２としては、図１、図３Ａ、
図５に示す如く、この偏平角型電池容器１０の内部形状
の矩形状略３００ｍｍ×１００ｍｍと略等しい矩形状の
厚さが略２０μｍのアルミＡｌ箔より成る集電体５の両
面にリチウムＬｉと遷移金属の複合酸化物例えばＬｉＣ
ｏＯ2 を正極活物質４として被着したものである。The positive electrode plate 2 is as shown in FIGS.
As shown in FIG. 5, lithium Li is provided on both sides of a current collector 5 made of an aluminum Al foil having a rectangular thickness of about 20 μm, which is substantially equal to the rectangular shape of the flat rectangular battery container 10 of about 300 mm × 100 mm. Complex oxides of transition metals such as LiC
OO 2 is deposited as the positive electrode active material 4.
【００２３】また負電極板３としては、図１、図３Ｂ、
図５に示す如く、この偏平角型電池容器１０の内部形状
の矩形状略３００ｍｍ×１００ｍｍと略等しい矩形状の
厚さが略１０μｍの銅Ｃｕ箔（又はニッケルＮｉ箔）よ
り成る集電体７の両面にリチウムＬｉをドープ、脱ドー
プ可能なカーボン例えばグラファイト構造を有する炭素
や難黒鉛化炭素材料等の炭素Ｃを負極活物質６として被
着したものである。As the negative electrode plate 3, as shown in FIGS.
As shown in FIG. 5, a current collector 7 made of copper Cu foil (or nickel Ni foil) having a rectangular thickness of approximately 10 μm, which is approximately equal to the rectangular shape of the flat rectangular battery container 10 of approximately 300 mm × 100 mm. On both surfaces of the negative electrode, carbon that can be doped with lithium Li and dedoped, for example, carbon having a graphite structure or carbon C such as a non-graphitizable carbon material is deposited as the negative electrode active material 6.
【００２４】また本例においてはセパレータ８ａとし
て、正電極板２、負電極板３よりやや大きめの矩形状の
厚さが２５μｍの微多孔性ポリエチレンフィルム、ポリ
プロピレンフィルム等を２枚重ねた袋状にしたものを使
用する。In the present embodiment, the separator 8a is in the form of a bag in which two rectangular porous films having a thickness of 25 μm, which are slightly larger than the positive electrode plate 2 and the negative electrode plate 3, and a polypropylene film, etc. are stacked. Use what you did.
【００２５】本例においては、この正電極板２及び負電
極板３を図３Ａ及びＢに示す如く袋状のセパレータ８ａ
に夫々挿入する。この場合矩形状正電極板２の一辺側の
所定幅の正極活物質４が被着されていない集電体５をリ
ード部５ａとしてこのセパレータ８ａより露出するよう
にすると共に矩形状負電極板３のこの正電極板２の一辺
側に対向する辺側の所定幅の負極活物質６が被着されて
いない集電体７をリード部７ａとしてこのセパレータ８
ａより露出する如くする。In this example, the positive electrode plate 2 and the negative electrode plate 3 are formed into a bag-shaped separator 8a as shown in FIGS. 3A and 3B.
Insert into each. In this case, the positive electrode active material 4 having a predetermined width on one side of the rectangular positive electrode plate 2 is made to be exposed from the separator 8a as a lead portion 5a, and the rectangular negative electrode plate 3 is formed. The current collector 7 to which the negative electrode active material 6 having a predetermined width on the side opposite to the one side of the positive electrode plate 2 is not attached is used as the lead portion 7a.
It should be exposed from a.
【００２６】本例においては、この袋状のセパレータ８
ａに挿入した５１枚の正電極板２及び５２枚の負電極板
３を交互に積層して、矩形状の積層体１４を形成する。
本例においては、図１に示す如くこの矩形状の積層体１
４の一辺側即ち正電極板２の集電体５の所定幅のリード
部５ａを例えば純アルミＪＩＳ Ａ１０５０のＯ材又は
Ｈ１２，Ｈ１１２より成る、この正電極板２の縦方向の
長さ略１００ｍｍの長さを有する正極リード体１１ａに
全長さに亘って超音波発振器２０ａ及びホーン２０ｂよ
り成る超音波溶接装置２０を使用して超音波溶接により
溶着する如くする。この場合、正電極板２の集電体５の
所定幅のリード部５ａはアルミであり、この正極リード
体１１ａもアルミであるので、この５１枚の正極板２の
集電体５のリード部５ａ同志とこの正極リード体１１ａ
とを超音波溶接装置２０により良好に溶着することがで
きる。この超音波溶接装置２０の超音波発振器２０ａの
発振周波数は２０ＫＨｚ〜４０ＫＨｚである。In this example, this bag-shaped separator 8
The 51 positive electrode plates 2 and 52 negative electrode plates 3 inserted in a are alternately laminated to form a rectangular laminate 14.
In this example, as shown in FIG. 1, this rectangular laminated body 1
4, the lead portion 5a of the current collector 5 of the positive electrode plate 2 having a predetermined width is made of, for example, O material of pure aluminum JIS A1050 or H12, H112, and the length of the positive electrode plate 2 in the longitudinal direction is approximately 100 mm. The ultrasonic welding device 20 including the ultrasonic oscillator 20a and the horn 20b is used for welding over the entire length of the positive electrode lead body 11a having the above length by ultrasonic welding. In this case, the lead portion 5a of the current collector 5 of the positive electrode plate 2 having a predetermined width is made of aluminum, and the positive electrode lead body 11a is also made of aluminum. Therefore, the lead portions of the current collector 5 of the 51 positive electrode plates 2 are made of aluminum. 5a and this positive electrode lead body 11a
The ultrasonic welding device 20 can satisfactorily weld and. The oscillation frequency of the ultrasonic oscillator 20a of the ultrasonic welding device 20 is 20 KHz to 40 KHz.
【００２７】また、この矩形状の積層体１４の一辺側に
対向する辺側即ち負電極板３の集電体７の所定幅のリー
ド部７ａを例えば純銅ＪＩＳ Ｃ１１００のＯ材又は１
／４Ｈ，１／２Ｈより成る、この負電極板３の縦方向の
長さ略１００ｍｍの長さを有する負極リード体１２ａに
全長さに亘って超音波溶接装置２０を使用して超音波溶
接により溶着する如くする。この場合、負電極板３の集
電体７の所定幅のリード部７ａは銅であり、この負極リ
ード体１２ａも銅であるので、この５２枚の負電極板３
の集電体７のリード部７ａ同志とこの負極リード体１２
ａとを超音波溶接装置２０により良好に溶着することが
できる。この正極リード体１１ａ及び負極リード体１２
ａが溶着された積層体１４を、この偏平角型電池容器１
０に収納する如くする。Further, a lead portion 7a of a predetermined width of the current collector 7 of the negative electrode plate 3 which is opposed to one side of the rectangular laminate 14 is formed of, for example, pure copper JIS C1100 O material or 1
The negative electrode lead body 12a having a length of about 100 mm in the longitudinal direction of the negative electrode plate 3 of / 4H and 1 / 2H is ultrasonically welded over the entire length by using the ultrasonic welding device 20. Make it weld. In this case, since the lead portion 7a of the current collector 7 of the negative electrode plate 3 having a predetermined width is made of copper and the negative electrode lead body 12a is also made of copper, the 52 negative electrode plates 3 are formed.
7a of the current collector 7 and the negative electrode lead body 12
A and a can be satisfactorily welded by the ultrasonic welding device 20. The positive electrode lead body 11a and the negative electrode lead body 12
The laminated body 14 in which a is welded is used as the flat rectangular battery container 1
It's stored in 0.
【００２８】この場合、正極リード体１１ａ及び負極リ
ード体１２ａとして超音波溶接装置２０により超音波溶
接がしやすい電極材料を使用するを可とする。In this case, as the positive electrode lead body 11a and the negative electrode lead body 12a, it is possible to use an electrode material which is easily ultrasonically welded by the ultrasonic welding device 20.
【００２９】また、この密閉型の偏平角型電池容器１０
内にプロピレンカーボネート、ジエチルカーボネートの
混合溶媒の中にＬｉＰＦ6 を１モル／１の割合で溶解し
た有機電解液９を注入し、この正極活物質４及び負極活
物質６間に、この有機電解液９を充填する如くする。こ
のリチウムイオン二次電池の化学反応は前述化１に示す
如くである。Also, the closed flat rectangular battery container 10 is used.
An organic electrolytic solution 9 in which LiPF 6 was dissolved in a mixed solvent of propylene carbonate and diethyl carbonate at a ratio of 1 mol / 1 was injected thereinto, and the organic electrolytic solution was placed between the positive electrode active material 4 and the negative electrode active material 6. 9 is filled. The chemical reaction of this lithium-ion secondary battery is as shown in Chemical Formula 1 above.
【００３０】また本例においては正極リード体１１ａ及
び負極リード体１２ａを夫々外部正極端子１１及び外部
負極端子１２に一体的に設ける如くする。その他は従来
と同様に構成する。Further, in this example, the positive electrode lead body 11a and the negative electrode lead body 12a are integrally provided on the external positive electrode terminal 11 and the external negative electrode terminal 12, respectively. Others are configured similarly to the conventional one.
【００３１】斯る本例によるリチウムイオン二次電池に
よれば例えば平均電圧が３．５Ｖで５０Ａｈのものを得
ることができる。According to the lithium ion secondary battery of the present example, it is possible to obtain a battery having an average voltage of 3.5 V and 50 Ah.
【００３２】本例においては上述の如く５１枚の正電極
板２の集電体５のリード部５ａ同志及び正極リード体１
１ａを超音波溶接装置２０により溶接接続すると共に５
２枚の負電極板３の集電体７のリード部７ａ同志及び負
極リード体１２ａを超音波溶接装置２０により溶接接続
しているので、この夫々の溶接接続部には毛細管現象に
よっても電解液９がしみ込むことがなく、本例による二
次電池の内部抵抗の値が増大することがなく、この内部
抵抗の値が約１．４ｍΩ〜３ｍΩと比較的小さく且つ、
この内部抵抗値のバラツキも小さい利益がある。In this example, as described above, the lead portions 5a of the current collector 5 of the 51 positive electrode plates 2 and the positive electrode lead body 1 are connected together.
1a is welded and connected by the ultrasonic welding device 20 and 5
Since the lead portions 7a of the current collector 7 of the two negative electrode plates 3 and the negative electrode lead body 12a are welded and connected by the ultrasonic welding device 20, each of the welded connection portions has an electrolytic solution due to a capillary phenomenon. 9 does not soak, the value of the internal resistance of the secondary battery according to the present example does not increase, the value of the internal resistance is relatively small at about 1.4 mΩ to 3 mΩ, and
This variation in the internal resistance value is also small.
【００３３】また本例によれば、二次電池の内部抵抗の
値が小さいので、放電容量が増大すると共に充電効率、
重負荷特性、低温特性の良いものが得られる利益があ
る。Further, according to the present example, since the value of the internal resistance of the secondary battery is small, the discharge capacity increases and the charging efficiency,
There is an advantage that good load characteristics and low temperature characteristics can be obtained.
【００３４】尚、上述実施例においては本発明をリチウ
ムイオン二次電池に適用した例につき述べたが、本発明
をその他の積層型の二次電池に適用できることは容易に
理解できよう。また、本発明は上述実施例に限らず本発
明の要旨を逸脱することなく、その他種々の構成が採り
得ることは勿論である。In the above-mentioned embodiments, the example in which the present invention is applied to the lithium ion secondary battery is described, but it can be easily understood that the present invention can be applied to other laminated secondary batteries. Further, the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various other configurations can be adopted without departing from the gist of the present invention.
【００３５】[0035]
【発明の効果】本発明によれば正電極板のリード部同志
及び負電極板のリード部同志を夫々溶接接続しているの
で、この夫々の溶接接続部に電解液がしみ込むことがな
く、本発明による二次電池の内部抵抗の値を小さくでき
る利益があると共にこの内部抵抗値のバラツキが小さい
利益がある。According to the present invention, since the lead portions of the positive electrode plate and the lead portions of the negative electrode plate are welded to each other, the electrolytic solution does not soak into the respective welded joints, and There is an advantage that the value of the internal resistance of the secondary battery according to the present invention can be reduced and the variation in the internal resistance value is small.
【００３６】また本発明によれば二次電池の内部抵抗の
値が小さいので、放電容量が増大すると共に充電効率、
重負荷特性、低温特性の良いものが得られる利益があ
る。Further, according to the present invention, since the value of the internal resistance of the secondary battery is small, the discharge capacity increases and the charging efficiency,
There is an advantage that good load characteristics and low temperature characteristics can be obtained.
【図１】本発明二次電池の要部の例を示す斜視図であ
る。FIG. 1 is a perspective view showing an example of a main part of a secondary battery of the present invention.
【図２】本発明二次電池の一実施例を示す断面図であ
る。FIG. 2 is a cross-sectional view showing an embodiment of the secondary battery of the present invention.
【図３】正電極板及び負電極板の例を示す斜視図であ
る。FIG. 3 is a perspective view showing an example of a positive electrode plate and a negative electrode plate.
【図４】従来の二次電池の例を示す断面図である。FIG. 4 is a cross-sectional view showing an example of a conventional secondary battery.
【図５】リチウムイオン二次電池の説明に供する線図で
ある。FIG. 5 is a diagram provided for explaining a lithium ion secondary battery.
２ 正電極板 ３ 負電極板 ４ 正極活物質 ５ 正極集電体 ５ａ リード部 ６ 負極活物質 ７ 負極集電体 ７ａ リード部 ８ａ セパレータ ９ 電解液 １０ 偏平角型電池容器 １１ 外部正極端子 １１ａ 正極リード体 １２ 外部負極端子 １２ａ 負極リード体 ２０ 超音波溶接装置 2 Positive electrode plate 3 Negative electrode plate 4 Positive electrode active material 5 Positive electrode current collector 5a Lead part 6 Negative electrode active material 7 Negative electrode current collector 7a Lead part 8a Separator 9 Electrolyte 10 Flat rectangular battery container 11 External positive electrode terminal 11a Positive electrode lead Body 12 External negative electrode terminal 12a Negative electrode lead body 20 Ultrasonic welding device
Claims (3)
電極板と、負極集電体に負極活物質が被着された負電極
板とがセパレータを介して交互に相対向して複数枚重ね
られて成る二次電池において、上記正極集電体同志及び
負極集電体同志を夫々溶接手段により溶接接続したこと
を特徴とする二次電池。1. A positive electrode plate having a positive electrode current collector coated with a positive electrode active material and a negative electrode plate having a negative electrode current collector coated with a negative electrode active material are alternately opposed to each other via a separator. In a secondary battery formed by stacking a plurality of sheets, the positive electrode current collector and the negative electrode current collector are welded and connected by welding means, respectively.
極集電体同志と外部正極端子に一体構成の正極リード体
とを溶接手段により溶接接続すると共に上記負極集電体
同志と外部負極端子に一体構成の負極リード体とを溶接
手段により溶接接続したことを特徴とする二次電池。2. The secondary battery according to claim 1, wherein the positive electrode current collector and the external positive electrode terminal are integrally connected to the positive electrode lead body by welding, and the negative electrode current collector and the external negative electrode terminal are welded together. A secondary battery characterized in that a negative electrode lead body integrally configured with the above is welded and connected by welding means.
て、上記溶接手段が超音波溶接装置であることを特徴と
する二次電池。3. The secondary battery according to claim 1 or 2, wherein the welding means is an ultrasonic welding device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11913094A JP3605851B2 (en) | 1994-05-31 | 1994-05-31 | Rechargeable battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11913094A JP3605851B2 (en) | 1994-05-31 | 1994-05-31 | Rechargeable battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07326336A true JPH07326336A (en) | 1995-12-12 |
| JP3605851B2 JP3605851B2 (en) | 2004-12-22 |
Family
ID=14753688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11913094A Expired - Fee Related JP3605851B2 (en) | 1994-05-31 | 1994-05-31 | Rechargeable battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3605851B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09213301A (en) * | 1996-02-06 | 1997-08-15 | Ricoh Co Ltd | Rectangular battery |
| JP2002252036A (en) * | 2001-02-23 | 2002-09-06 | Mitsubishi Materials Corp | Lithium ion polymer secondary battery |
| JP2002270241A (en) * | 2001-03-13 | 2002-09-20 | Osaka Gas Co Ltd | Nonaqueous secondary cell |
| EP1087451A3 (en) * | 1999-09-21 | 2003-07-23 | Matsushita Electric Industrial Co., Ltd. | Electrode plate unit for rechargeable battery and manufacturing method thereof |
| JP2004515083A (en) * | 2000-12-06 | 2004-05-20 | エナジィ・ストーリッジ・システムズ・プロプライエタリー・リミテッド | Energy storage device |
| US6746494B2 (en) | 1999-12-14 | 2004-06-08 | Matsushita Electric Industrial Co., Ltd. | Battery manufacturing method and apparatus |
| US8025202B2 (en) | 2006-09-28 | 2011-09-27 | Sanyo Electric Co., Ltd. | Method for manufacturing sealed battery |
| JP2012119505A (en) * | 2010-12-01 | 2012-06-21 | Fdk Corp | Power storage device |
| US9048487B2 (en) | 2010-09-13 | 2015-06-02 | Samsung Sdi Co., Ltd. | Secondary battery and manufacturing method thereof |
| JP2019212412A (en) * | 2018-06-01 | 2019-12-12 | プライムアースＥｖエナジー株式会社 | Lamination electrode plate group, secondary battery, and manufacturing method of secondary battery |
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|---|---|---|---|---|
| JPS4819401Y1 (en) * | 1970-03-12 | 1973-06-02 | ||
| JPS52128022U (en) * | 1976-03-13 | 1977-09-29 | ||
| JPS6085071U (en) * | 1983-11-16 | 1985-06-12 | 三洋電機株式会社 | square battery |
| JPH0475254A (en) * | 1990-07-18 | 1992-03-10 | Ricoh Co Ltd | Secondary battery |
-
1994
- 1994-05-31 JP JP11913094A patent/JP3605851B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4819401Y1 (en) * | 1970-03-12 | 1973-06-02 | ||
| JPS52128022U (en) * | 1976-03-13 | 1977-09-29 | ||
| JPS6085071U (en) * | 1983-11-16 | 1985-06-12 | 三洋電機株式会社 | square battery |
| JPH0475254A (en) * | 1990-07-18 | 1992-03-10 | Ricoh Co Ltd | Secondary battery |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09213301A (en) * | 1996-02-06 | 1997-08-15 | Ricoh Co Ltd | Rectangular battery |
| EP1087451A3 (en) * | 1999-09-21 | 2003-07-23 | Matsushita Electric Industrial Co., Ltd. | Electrode plate unit for rechargeable battery and manufacturing method thereof |
| US6761993B1 (en) | 1999-09-21 | 2004-07-13 | Matsushita Electric Industrial Co., Ltd. | Electrode plate unit for rechargeable battery and manufacturing method thereof |
| US6746494B2 (en) | 1999-12-14 | 2004-06-08 | Matsushita Electric Industrial Co., Ltd. | Battery manufacturing method and apparatus |
| US6965090B2 (en) | 1999-12-14 | 2005-11-15 | Matsushita Electric Industrial Co., Ltd. | Battery manufacturing method and apparatus |
| JP2004515083A (en) * | 2000-12-06 | 2004-05-20 | エナジィ・ストーリッジ・システムズ・プロプライエタリー・リミテッド | Energy storage device |
| JP2002252036A (en) * | 2001-02-23 | 2002-09-06 | Mitsubishi Materials Corp | Lithium ion polymer secondary battery |
| JP2002270241A (en) * | 2001-03-13 | 2002-09-20 | Osaka Gas Co Ltd | Nonaqueous secondary cell |
| US8025202B2 (en) | 2006-09-28 | 2011-09-27 | Sanyo Electric Co., Ltd. | Method for manufacturing sealed battery |
| US9048487B2 (en) | 2010-09-13 | 2015-06-02 | Samsung Sdi Co., Ltd. | Secondary battery and manufacturing method thereof |
| JP2012119505A (en) * | 2010-12-01 | 2012-06-21 | Fdk Corp | Power storage device |
| JP2019212412A (en) * | 2018-06-01 | 2019-12-12 | プライムアースＥｖエナジー株式会社 | Lamination electrode plate group, secondary battery, and manufacturing method of secondary battery |
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