JPH07245092A - Secondary battery - Google Patents
Secondary batteryInfo
- Publication number
- JPH07245092A JPH07245092A JP6033821A JP3382194A JPH07245092A JP H07245092 A JPH07245092 A JP H07245092A JP 6033821 A JP6033821 A JP 6033821A JP 3382194 A JP3382194 A JP 3382194A JP H07245092 A JPH07245092 A JP H07245092A
- Authority
- JP
- Japan
- Prior art keywords
- negative electrode
- positive electrode
- rectangular
- secondary battery
- separator
- 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.)
- Pending
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
- H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
-
- 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
-
- 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
る大容量の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 large-capacity 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。図５及び図６を参
照してこのリチウムイオン二次電池につき説明する。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. The lithium ion secondary battery will be described with reference to FIGS. 5 and 6.
【０００３】図５において、１０は例えば厚さ３００μ
ｍのステンレス板より成る横方向の長さが略３００ｍ
ｍ、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２及び５２枚の負電極
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
する如くする。In FIG. 5, reference numeral 10 denotes, for example, a thickness of 300 μm.
The horizontal length of the stainless steel plate is approximately 300m.
m, a vertical length of about 100 mm, and a thickness of 25 mm shows a flat type rectangular battery container of a sealed type single cell, in which the flat rectangular battery container 10 includes 51 positive electrodes 2 and 52 negative electrodes. The electrodes 3 are alternately stacked with the separators 8 interposed therebetween so as to accommodate a stacked body.
【０００４】この正電極２としては図５、図６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 2, as shown in FIGS. 5 and 6, 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 thickness of about 20 μm. As the positive electrode active material 4.
【０００５】また負電極３としては図５、図６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。Further, as the negative electrode 3, as shown in FIGS. 5 and 6, lithium Li is doped on both surfaces of a current collector 7 made of a copper Cu foil (or nickel Ni foil) having a rectangular thickness of about 10 μm and removed. Dopable carbon, 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２、負電極
３及びセパレータ８の形状としては、図５に示す如くセ
パレータ８の形状を最大とし、正電極２及び負電極３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 the shapes of the positive electrode 2, the negative electrode 3 and the separator 8, the shape of the separator 8 is maximized as shown in FIG. 5, and the shapes of the positive electrode 2 and the negative electrode 3 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２及び負電極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 above the positive electrode 2 and the negative electrode 3, respectively, and the tongue pieces 2a as lead portions of the positive electrode 2 are provided in the flat rectangular battery container 10. Internally connected to each other, this connection point is connected to an external positive electrode terminal 11 provided on the outer upper side wall of the flat rectangular battery container 10, and a tongue piece 3a as a lead portion of the negative electrode 3 is connected to the flat rectangular battery container 10. Are connected to each other inside, 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５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. 5, 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５
に示す如く、正電極２及び負電極３の夫々の上側の左右
離間した位置に舌片２ａ及び３ａを設けて外部正極端子
１１及び外部負極端子１２に導出するようにしたので、
この偏平角型電池容器１０の内部上側に比較的大きな集
電に寄与しない部分を必要とし、このリチウムイオン二
次電池の全容積に対する集電に寄与する電極部分の容積
率即ち集電効率が良くない不都合があった。However, in such a conventional oblate type lithium ion secondary battery, as shown in FIG.
As shown in, since the tongue pieces 2a and 3a are provided at the left and right positions above the positive electrode 2 and the negative electrode 3, respectively, so that the tongue pieces 2a and 3a are led out to the external positive electrode terminal 11 and the external negative electrode terminal 12, respectively.
A relatively large portion that does not contribute to current collection is required on the upper inside of the flat rectangular battery container 10, and the volume ratio of the electrode portion that contributes to current collection with respect to the total volume of the lithium ion secondary battery, that is, current collection efficiency is good. There was no inconvenience.
【００１３】本発明は斯る点に鑑み容積率及び集電効率
を向上し、エネルギー密度を向上することを目的とす
る。In view of the above points, the present invention has an object to improve the volume ratio and the current collecting efficiency, and to improve the energy density.
【００１４】[0014]
【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４に示す如く矩形状の正電極２及び負電極３を
セパレータ８を介して相互に積層して、矩形状の積層体
１４とし、この矩形状積層体１４の一辺に正極端子１１
ａを設けると共にこの積層体１４の一辺に対向する辺に
負極端子１２ａを設けたものである。The secondary battery of the present invention is formed by stacking rectangular positive electrodes 2 and negative electrodes 3 on each other via a separator 8 as shown in FIGS. Body 14 and the positive electrode terminal 11 is provided on one side of the rectangular laminated body 14.
a is provided and the negative electrode terminal 12a is provided on the side opposite to one side of the laminated body 14.
【００１５】本発明は上述二次電池において、例えば図
１に示す如く、この矩形状積層体１４を平板型電池容器
１０に収納するようにしたものである。According to the present invention, in the above-mentioned secondary battery, for example, as shown in FIG. 1, the rectangular laminate 14 is housed in the flat battery container 10.
【００１６】[0016]
【作用】本発明によれば矩形状積層体１４の対向する辺
に夫々正極端子１１ａ及び負極端子１２ａを設けたので
正電極２及び負電極３の大きさを略電池容器１０の大き
さとすることができ、容積率及び集電効率が向上する。According to the present invention, the positive electrode terminal 11a and the negative electrode terminal 12a are provided on the opposite sides of the rectangular laminated body 14, respectively. Therefore, the size of the positive electrode 2 and the negative electrode 3 should be approximately the size of the battery container 10. The volume ratio and current collection efficiency are improved.
【００１７】[0017]
【実施例】以下図１〜図４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。図１〜図４例は本発明をリ
チウムイオン二次電池に適用した例である。この図１、
図２において、図５に対応する部分には同一符号を付し
て示し、その詳細説明は省略する。EXAMPLE An example of the secondary battery of the present invention will be described below with reference to FIGS. 1 to 4 are examples in which the present invention is applied to a lithium ion secondary battery. This Figure 1,
2, parts corresponding to those in FIG. 5 are designated by the same reference numerals, and detailed description thereof will be omitted.
【００１８】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２及び５２枚の負
電極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 a thickness 3 for example.
The horizontal length of the stainless steel plate of 00μm is about 30
0 mm, vertical length is about 100 mm, thickness is 25 mm
Shows a flat rectangular battery container of a closed type single cell of Fig. 1, in which a positive electrode 2 of 51 sheets and a negative electrode 3 of 52 sheets are alternately laminated in the flat rectangular battery container 10 through a separator 14a. To store.
【００１９】この正電極２としては、図１、図３、図
４、図６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Ｌ
ｉＣｏＯ2 を正極活物質４として被着したものである。As shown in FIGS. 1, 3, 4 and 6, the positive electrode 2 has a rectangular thickness which is approximately equal to the internal rectangular shape of the flat rectangular battery container 10 of approximately 300 mm × 100 mm. Current collector 5 made of aluminum Al foil with a thickness of about 20 μm
On both sides of the composite oxide of lithium Li and transition metal, such as L
iCoO 2 is deposited as the positive electrode active material 4.
【００２０】また負電極３としては、図１、図３、図
４、図６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 shown in FIGS. 1, 3, 4 and 6, the negative electrode 3 has a rectangular thickness which is substantially equal to the internal rectangular shape of the flat rectangular battery container 10 of approximately 300 mm × 100 mm. Is approximately 10 μm copper Cu foil (or nickel Ni
Both sides of the current collector 7 made of foil are doped with lithium Li,
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.
【００２１】また本例においてはセパレータ８ａとし
て、正電極２、負電極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 formed in a bag shape in which two sheets of microporous polyethylene film, polypropylene film or the like having a rectangular shape slightly larger than the positive electrode 2 and the negative electrode 3 and a thickness of 25 μm are stacked. To use.
【００２２】本例においては、この正電極２及び負電極
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２の一辺側の所定幅
２ｂをこのセパレータ８ａより露出するようにすると共
に矩形状負電極３のこの正電極２の一辺側に対向する辺
側の所定幅３ｂをこのセパレータ８ａより露出する如く
する。In this example, the positive electrode 2 and the negative electrode 3 are respectively inserted into the bag-shaped separator 8a as shown in FIGS. 3A and 3B. In this case, a predetermined width 2b on one side of the rectangular positive electrode 2 is exposed from the separator 8a, and a predetermined width 3b on the side of the rectangular negative electrode 3 facing the one side of the positive electrode 2 is formed on the separator. It is exposed from 8a.
【００２３】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２及び５２枚の負電極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４に示す如くこの矩形状の積層体１４の
一辺側即ち正電極２の所定幅の露出部２ｂを例えば銅Ｃ
ｕより成る、この正電極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
音波溶接により溶着する如くする。In the present example, this bag-shaped separator 8
The 51 positive electrodes 2 and 52 negative electrodes 3 inserted in a are alternately laminated to form a rectangular laminated body 14. In this example, as shown in FIG. 4, one side of the rectangular laminated body 14, that is, the exposed portion 2b having a predetermined width of the positive electrode 2 is formed of, for example, copper C.
The vertical length of the positive electrode 2 made of u is approximately 100 mm.
The length of the positive electrode lead body 11a is welded over the entire length by ultrasonic welding.
【００２４】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３の所定幅の露出部３ｂを例え
ば銅Ｃｕより成る、この負電極３の縦方向の長さ略１０
０ｍｍの長さを有する負極リード体１２ａに全長さに亘
って超音波溶接により溶着する如くする。この正極リー
ド体１１ａ及び負極リード体１２ａが溶着された積層体
１４を、この偏平角型電池容器１０に収納する如くす
る。Further, the side opposite to one side of the rectangular laminated body 14, that is, the exposed portion 3b having a predetermined width of the negative electrode 3 is made of, for example, copper Cu.
The negative electrode lead body 12a having a length of 0 mm is welded over the entire length by ultrasonic welding. The laminated body 14 to which the positive electrode lead body 11a and the negative electrode lead body 12a are welded is housed in the flat rectangular battery container 10.
【００２５】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, this closed flat rectangular battery container 10
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.
【００２６】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に接続する如くする。その他は従来と同様
に構成する。In this example, the positive electrode lead body 11a and the negative electrode lead body 12a are connected to the external positive electrode terminal 11 and the external negative electrode terminal 12, respectively. Others are configured similarly to the conventional one.
【００２７】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 this example, it is possible to obtain a battery having an average voltage of 3.5 V and 50 Ah.
【００２８】本例においては上述の如く矩形状の正電極
２及び負電極３より成る矩形状積層体１４の対向する辺
に夫々正極リード体１１ａ及び負極リード体１２ａを設
けたので、この正電極２及び負電極３の矩形状の大きさ
を略偏平角型電池容器１０の内部形状の大きさとするこ
とができるので、容積率及び集電効率が向上し、エネル
ギー密度が向上すると共に単位エネルギー当たりにおけ
る価格の低い二次電池を得ることができる。In this embodiment, the positive electrode lead body 11a and the negative electrode lead body 12a are provided on the opposite sides of the rectangular laminate 14 composed of the rectangular positive electrode 2 and the negative electrode 3 as described above. Since the rectangular shape of the negative electrode 3 and the negative electrode 3 can be set to the internal shape of the substantially flat rectangular battery container 10, the volume ratio and the current collection efficiency are improved, the energy density is improved, and the unit energy It is possible to obtain a secondary battery at a low price.
【００２９】また上述例においてはセパレータ８ａを袋
状としたので正電極２と負電極３との間の微多孔性ポリ
プロピレンフィルムが２枚となり、このポリプロピレン
フィルムの孔の位置が異なり、ショートの可能性が低く
なる利益がある。Further, in the above example, since the separator 8a has a bag shape, two microporous polypropylene films are provided between the positive electrode 2 and the negative electrode 3, and the positions of the holes of the polypropylene film are different, so that a short circuit is possible. There is a benefit that the sex becomes low.
【００３０】またセパレータ８ａを袋状とし、このセパ
レータ８ａに挿入した正電極２及び負電極３を積層する
ので従来の正電極２及び負電極３をフィルム状のセパレ
ータ８を介して積層するものに比し製造が容易となる利
益がある。Further, since the separator 8a is formed in a bag shape and the positive electrode 2 and the negative electrode 3 inserted in the separator 8a are laminated, the conventional positive electrode 2 and the negative electrode 3 are laminated with the film-shaped separator 8 interposed therebetween. On the other hand, there is an advantage that manufacturing is easy.
【００３１】また上述実施例においては矩形状の正電極
２及び負電極３より成る矩形状の積層体１４の対向する
辺の全長に亘って夫々正極リード体１１ａ及び負極リー
ド体１２ａを設けたので、従来の上部に正極リード部及
び負極リード部を設けたものに比し集電効率が良くなる
利益がある。Further, in the above embodiment, the positive electrode lead body 11a and the negative electrode lead body 12a are provided over the entire lengths of the opposite sides of the rectangular laminated body 14 including the rectangular positive electrode 2 and the negative electrode 3, respectively. However, there is an advantage that the current collecting efficiency is improved as compared with the conventional one in which the positive electrode lead portion and the negative electrode lead portion are provided on the upper portion.
【００３２】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
をその他の二次電池に適用できることは勿論である。ま
た本発明は上述実施例に限ることなく本発明の要旨を逸
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 embodiment, an example in which the present invention is applied to a lithium ion secondary battery has been described, but it goes without saying that the present invention can be applied to other secondary batteries. Further, the present invention is not limited to the above-described embodiments, and needless to say, various other configurations can be adopted without departing from the gist of the present invention.
【００３３】[0033]
【発明の効果】本発明によれば矩形状の正電極２及び負
電極３より成る矩形状積層体１４の対向する辺に夫々正
極端子１１ａ及び負極端子１２ａを設けたので、この正
電極２及び負電極３の矩形状の大きさを略平板型電池容
器１０の内部形状の大きさとすることができるので、容
積率及び集電効率が向上し、エネルギー密度が向上する
と共に単位エネルギー当たりにおける価格の低い二次電
池を得ることができる利益がある。According to the present invention, the positive electrode terminal 11a and the negative electrode terminal 12a are provided on the opposite sides of the rectangular laminate 14 composed of the rectangular positive electrode 2 and the negative electrode 3, respectively. Since the rectangular shape of the negative electrode 3 can be made the same as the internal shape of the substantially flat plate type battery container 10, the volume ratio and the current collection efficiency are improved, the energy density is improved, and the price per unit energy is reduced. There is an advantage that a low secondary battery can be obtained.
【図１】本発明二次電池の一実施例を示す断面図であ
る。FIG. 1 is a sectional view showing an embodiment of a secondary battery of the present invention.
【図２】図１の上面図である。FIG. 2 is a top view of FIG.
【図３】本発明による正電極及び負電極の例を示す斜視
図である。FIG. 3 is a perspective view showing an example of a positive electrode and a negative electrode according to the present invention.
【図４】図１の要部の例を示す斜視図である。FIG. 4 is a perspective view showing an example of a main part of FIG.
【図５】従来の二次電池の例を示す断面図である。FIG. 5 is a cross-sectional view showing an example of a conventional secondary battery.
【図６】リチウムイオン二次電池の説明に供する線図で
ある。FIG. 6 is a diagram provided for explaining a lithium ion secondary battery.
２ 正電極 ３ 負電極 ４，６ 活物質 ５，７ 集電体 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 2 Positive electrode 3 Negative electrode 4,6 Active material 5,7 Current collector 8a Separator 9 Electrolyte solution 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
Claims (2)
を介して相互に積層して矩形状積層体とし前記矩形状積
層体の一辺に正極端子を設けると共に前記積層体の一辺
に対向する辺に負極端子を設けたことを特徴とする二次
電池。1. A rectangular positive electrode and a negative electrode are laminated on each other via a separator to form a rectangular laminated body, and a positive electrode terminal is provided on one side of the rectangular laminated body and a side facing the one side of the laminated body. A secondary battery characterized in that a negative electrode terminal is provided on the.
矩形状積層体を平板型電池容器に収納するようにしたこ
とを特徴とする二次電池。2. The secondary battery according to claim 1, wherein the rectangular laminated body is housed in a flat plate type battery container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6033821A JPH07245092A (en) | 1994-03-03 | 1994-03-03 | Secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6033821A JPH07245092A (en) | 1994-03-03 | 1994-03-03 | Secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07245092A true JPH07245092A (en) | 1995-09-19 |
Family
ID=12397155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6033821A Pending JPH07245092A (en) | 1994-03-03 | 1994-03-03 | Secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07245092A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0766327A1 (en) * | 1995-09-30 | 1997-04-02 | VARTA Batterie Aktiengesellschaft | Prismatic galvanic cell |
| JPH09213301A (en) * | 1996-02-06 | 1997-08-15 | Ricoh Co Ltd | Rectangular battery |
| US6761993B1 (en) | 1999-09-21 | 2004-07-13 | Matsushita Electric Industrial Co., Ltd. | Electrode plate unit for rechargeable battery and manufacturing method thereof |
| US6780538B2 (en) | 1999-07-22 | 2004-08-24 | Matsushita Electric Industrial Co., Ltd. | Battery module, and rechargeable battery for constituting the battery module |
-
1994
- 1994-03-03 JP JP6033821A patent/JPH07245092A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0766327A1 (en) * | 1995-09-30 | 1997-04-02 | VARTA Batterie Aktiengesellschaft | Prismatic galvanic cell |
| JPH09213301A (en) * | 1996-02-06 | 1997-08-15 | Ricoh Co Ltd | Rectangular battery |
| US6780538B2 (en) | 1999-07-22 | 2004-08-24 | Matsushita Electric Industrial Co., Ltd. | Battery module, and rechargeable battery for constituting the battery module |
| US6821673B1 (en) | 1999-07-22 | 2004-11-23 | Matsushita Electric Industrial Co., Ltd. | Battery module, and rechargeable battery for constituting the battery module |
| US7166390B2 (en) | 1999-07-22 | 2007-01-23 | Matsushita Electric Industrial Co., Ltd. | Battery module, and rechargeable battery for constituting the battery module |
| US6761993B1 (en) | 1999-09-21 | 2004-07-13 | Matsushita Electric Industrial Co., Ltd. | Electrode plate unit for rechargeable battery and manufacturing method thereof |
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