JPH11111262A - Thin battery - Google Patents

Thin battery

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Publication number
JPH11111262A
JPH11111262A JP27296697A JP27296697A JPH11111262A JP H11111262 A JPH11111262 A JP H11111262A JP 27296697 A JP27296697 A JP 27296697A JP 27296697 A JP27296697 A JP 27296697A JP H11111262 A JPH11111262 A JP H11111262A
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JP
Japan
Prior art keywords
negative electrode
positive electrode
thin battery
electrode outer
thin
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
Application number
JP27296697A
Other languages
Japanese (ja)
Inventor
Masahisa Fujimoto
Yoshinori Kida
Koji Nishio
Toshiyuki Noma
Ryuji Oshita
Tomokazu Yoshida
智一 吉田
佳典 喜田
竜司 大下
俊之 能間
正久 藤本
晃治 西尾
Original Assignee
Sanyo Electric Co Ltd
三洋電機株式会社
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.)
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Publication date
Application filed by Sanyo Electric Co Ltd, 三洋電機株式会社 filed Critical Sanyo Electric Co Ltd
Priority to JP27296697A priority Critical patent/JPH11111262A/en
Publication of JPH11111262A publication Critical patent/JPH11111262A/en
Application status is Pending legal-status Critical

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage
    • Y02E60/12Battery technologies with an indirect contribution to GHG emissions mitigation

Abstract

PROBLEM TO BE SOLVED: To improve a cycle characteristic, and provide sufficient battery capacity without thickening a thickness of a thin battery even when lead parts are arranged by forming the lead parts in respective ones by respectively projecting a part of a positive electrode enclosing body and a negative electrode enclosing body outward.
SOLUTION: A positive electrode enclosing body 10 and a negative electrode enclosing body 20 are respectively formed of an aluminium conductive plate, and a material where respectively outward projecting lead parts 10a and 20a are formed in its part is used. A separator 30 composed of a polypropylene microporous film impregnated with a nonaqueous electrlyte, is interposed between a positive electrode 11 formed on a positive electrode current collecting body 12 and a negative electrode 21 formed on a negative electrode current collecting body 22, and this is sandwiched between both electrode enclosing bodies 10 and 20, and a sealing material 40 composed of electric insulating modified polypropylene is arranged in a peripheral part with both enclosing bodies 10 and 20, and a part between both enclosing bodies 10 and 20 is sealed by this sealing material 40, and is electrically insulated, and a thin battery is manufactured.
COPYRIGHT: (C)1999,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】この発明は、電気的に絶縁された正極外装体と負極外装体との間に正極と負極と電解質とが設けられてなる薄型電池に係り、特に、上記の正極外装体や負極外装体よりも外方に突出したリード部を設けるようにした薄型電池に関するものである。 TECHNICAL FIELD The present invention is electrically relates to thin battery positive and negative electrodes and an electrolyte is provided between the insulated cathode exterior body and the negative electrode outer body, in particular, the above positive Gokugaiso than the body and the negative electrode outer package relates thin battery was provided with lead portions projecting outwardly.

【0002】 [0002]

【従来の技術】従来より、ICカード,電卓等の電源として薄型電池が使用されており、このような薄型電池としては、図1及び図2に示すように、導電性板で構成された正極外装体10と負極外装体20との間に、正極集電体12に取り付けられた正極11と、電解質を含有させたセパレータ30と、負極集電体22に取り付けられた負極21とを設けると共に、上記の正極外装体10と負極外装体20との周辺部分に電気絶縁性の樹脂等で構成された封口材40を設け、この封口材40によって正極外装体10と負極外装体20との間を封止させると共に、正極外装体10と負極外装体20とを電気的に絶縁させたものが用いられていた。 Hitherto, IC cards, and thin battery is used as power calculator etc., as such a thin cell, as shown in FIGS. 1 and 2, a positive electrode made of a conductive plate between the exterior body 10 and the negative electrode outer package 20, the positive electrode 11 which is attached to the cathode current collector 12, a separator 30 which contains an electrolyte, provided with a negative electrode 21 which is attached to the anode current collector 22 , the positive electrode outer body 10 and a sealing member 40 made of an electrically insulating resin such as the peripheral portion of the negative electrode outer package 20 is provided, between the positive electrode outer body 10 and the negative electrode outer body 20 by the sealing member 40 causes sealed and that electrically to insulate the positive electrode outer body 10 and the negative electrode outer package 20 has been used.

【0003】また、このような薄型電池においては、この電池における電流を取り出すために、上記の正極外装体10と負極外装体20の外面部分に、導電性板等で構成されたリード部51,52をそれぞれ正極外装体10 [0003] Further, in such a thin battery, to retrieve the current in the battery, the outer surface portion of the positive electrode outer body 10 and the negative electrode outer package body 20, the lead portion 51 made of a conductive plate or the like, 52 each positive electrode outer body 10
や負極外装体20の外方に突出するようにして取り付けていた。 It was attached so as to protrude outwardly of and negative electrode outer package 20.

【0004】しかし、このように正極外装体10や負極外装体20の外面部分に別個にリード部51,52を取り付けた場合、これらのリード部51,52の分だけ電池全体としての厚みが厚くなるという問題があった。 However, this way when mounted separately lead portions 51 and 52 on the outer surface portion of the positive electrode outer body 10 and the negative electrode outer package 20, minute by the thickness of the whole batteries of the lead portion 51 is thick there is a problem that becomes.

【0005】また、近年においては、特開平5−325 Further, in recent years, JP-A-5-325
923号公報に示されるように、上記のような薄型電池において、図3及び図4に示すように、電池内に設けられた上記の正極集電体12及び負極集電体22の一部をそれぞれ封口材40よりも電池の外方に突出させ、これを各リード部12a,22aとして用いるようにしたものも提案されている。 As shown in 923 discloses, in a thin battery as described above, as shown in FIGS. 3 and 4, a portion of the positive electrode collector 12 and the negative electrode current collector 22 provided in the battery than the respective sealing member 40 protrudes outward of the battery, it has been proposed which those to use the lead portions 12a, as 22a.

【0006】ここで、上記のように正極集電体12や負極集電体22の一部を電池の外方に突出させてリード部12a,22aとして用いる場合、これらの集電体1 [0006] Here, the case of using a portion of the cathode current collector 12 and the negative electrode current collector 22 as described above is projected to the outside of the battery lead portion 12a, as 22a, these current collectors 1
2,22の厚みが一般に使用されている集電体12,2 Collector thickness of 2,22 are generally used 12,2
2のように薄いと、このように突出されたリード部12 When 2 of such a thin, lead portion 12 that projects in this way
a,22aが簡単に切れたりするおそれがあるため、これらの集電体12,22の厚みを厚くする必要があった。 a, since 22a is liable to cut or simply, it is necessary to increase the thickness of these current collectors 12 and 22.

【0007】しかし、このように正極集電体12や負極集電体22の厚みを厚くすると、上記の場合と同様に、 However, in this way increasing the thickness of the positive electrode current collector 12 and the negative electrode current collector 22, as in the case described above,
薄型電池における電池全体の厚みが厚くなるという問題があった。 There is a problem that the total thickness of the battery in the thin battery is increased.

【0008】また、上記のような各薄型電池において、 [0008] In addition, in each of the thin battery as described above,
その厚みを薄くするために、正極外装体10や負極外装体20の厚みを薄くすると、これらの薄型電池における強度が弱くなり、充放電を行なった場合に、これらの薄型電池が変形してサイクル特性が悪くなるという問題があり、また薄型電池内に設ける正極11や負極12の厚みを薄くすると、十分な電池容量が得られなくなるという問題があった。 In order to reduce its thickness, when the thickness of the positive electrode outer body 10 and the negative electrode outer package 20, the strength is weakened in these thin battery, the case of performing the charging and discharging, and these thin battery deformation cycles There is a problem that characteristic is deteriorated, and when the thickness of the positive electrode 11 and negative electrode 12 provided within the thin battery, sufficient battery capacity is a problem that can not be obtained.

【0009】 [0009]

【発明が解決しようとする課題】この発明は、電気的に絶縁された正極外装体と負極外装体との間に正極と負極と電解質とが設けられてなる薄型電池において、正極外装体や負極外装体よりも外方に突出したリード部を設ける場合における上記のような問題を解決することを課題とするものであり、リード部を設けた場合においても、 [Problems that the Invention is to Solve The present invention, in electrically thin battery positive and negative electrodes and an electrolyte is provided between the insulated cathode exterior body and the negative electrode outer body, the positive electrode outer body and the negative electrode is intended to an object to solve the above problems in the case of providing the lead portion protruding outward from the outer package, even in the case of providing the lead portion,
従来のように薄型電池の厚みが厚くなるということがなく、サイクル特性に優れると共に、十分な電池容量を有する薄型電池が得られるようにすることを課題とするものである。 Without that the thickness of the thin battery as in the prior art increases, excellent in cycle characteristics, it is an object to make it thin battery can be obtained having a sufficient battery capacity.

【0010】 [0010]

【課題を解決するための手段】この発明の請求項1における薄型電池においては、上記のような課題を解決するため、導電性板からなる正極外装体と負極外装体とが電気的に絶縁されると共に、この正極外装体と負極外装体との間に正極と負極と電解質とが設けられてなる薄型電池において、上記の正極外装体及び負極外装体の一部をそれぞれ外方に突出させてそれぞれにリード部を形成するようにしたのである。 In thin battery in claim 1 SUMMARY OF THE INVENTION The present invention, in order to solve the above problems, positive Gokugaiso body made of a conductive plate and the negative electrode outer body and are electrically insulated Rutotomoni, the thin battery positive and negative electrodes and an electrolyte composed is provided between the positive electrode outer body and the negative electrode outer body, to protrude outward above the positive electrode outer body and a portion of the negative electrode outer body, respectively it was possible to form a lead portion, respectively.

【0011】ここで、この請求項1に示す薄型電池のように、正極外装体及び負極外装体の一部をそれぞれ外方に突出させてそれぞれにリード部を形成すると、正極外装体や負極外装体に別個の導電性板からなるリード部を取り付ける場合や、正極集電体や負極集電体の厚みを厚くし、これらの集電体の一部を電池の外方に突出させてリード部を設ける場合に比べて、薄型電池の厚みを薄くすることができ、正極外装体や負極外装体や正極や負極の厚みを薄くする必要がなく、十分な強度を有してサイクル特性に優れると共に、十分な電池容量を有する薄型電池が得られるようになる。 [0011] Here, if this as thin battery shown in claim 1, to form the lead portions to each projecting part of the positive electrode outer body and the negative electrode outer body outward respectively, the positive electrode outer body and Fukyokugaiso when mounting a lead portion consisting of a separate conductive plate on the body or to increase the thickness of the positive electrode current collector and negative electrode current collector, to protrude outward lead portion of the battery part of the current collector in comparison with the case of providing the, it is possible to reduce the thickness of the thin battery, there is no need to reduce the thickness of the positive electrode outer body and the negative electrode outer body and the positive electrode and the negative electrode, is excellent in cycle characteristics sufficiently strong , so that a thin battery is obtained having a sufficient battery capacity.

【0012】ここで、上記の正極外装体や負極外装体を構成する導電性板の厚みが薄いと、薄型電池の強度が弱くなって、充放電を行なった場合に、薄型電池が変形してサイクル特性が悪くなる一方、その厚みが厚くなりすぎると、薄型電池における厚みが厚くなるため、この導電性板の厚みを15μm〜150μmの範囲内にすることが好ましい。 [0012] Here, the thickness of the conductive plate constituting the positive electrode outer body and the negative electrode outer body is thin, it weakened the strength of the thin battery, the case of performing the charging and discharging, and deformed thin battery while the cycle characteristics becomes worse, if the thickness is too thick, since the thickness of the thin battery is increased, it is preferable that the thickness of the conductive plate in the range of 15Myuemu~150myuemu.

【0013】また、正極外装体や負極外装体を構成する導電性板の材料としては、化学的に安定で電池内における電解質等と反応して劣化しない材料を用いることが好ましく、例えば、アルミニウム,ニッケル,ステンレスからなる導電性板を用いることが好ましい。 [0013] As the material of the conductive plate constituting the positive electrode exterior body and the negative electrode outer body, it is preferable to use a chemically stable and unreacted degraded material and the electrolyte or the like in the battery, for example, aluminum, nickel, it is preferable to use a conductive plate made of stainless steel.

【0014】また、この発明の請求項3に示す薄型電池のように、少なくとも上記の正極外装体と負極外装体とが対向するそれぞれの面に、正極又は負極との接続部を残して電気絶縁性の樹脂からなる樹脂層を形成すると、 Further, as the thin type battery shown in claim 3 of the present invention, on each side of the at least the positive electrode outer body and the negative electrode outer body faces, electrical insulation, leaving a connection between the positive electrode or the negative electrode When forming a resin layer made of sexual resin,
正極外装体と負極外装体とがこの電気絶縁性の樹脂によってより確実に電気的に絶縁されると共に、このような樹脂層が薄型電池の周囲を封止する封口材とうまく接着することにより、封口部分における水分等の出入りも抑制されて、薄型電池におけるサイクル特性等が向上される。 With the positive electrode outer body and the negative electrode outer package is electrically insulated more reliably by the electrically insulating resin, such resin layer by well bonded to the sealing member for sealing the periphery of the thin battery, out of moisture in the sealing portion be suppressed, such as cycle performance thin battery is improved.

【0015】ここで、このように正極外装体と負極外装体とが対向するそれぞれの面に電気絶縁性の樹脂からなる樹脂層を形成するにあたり、この樹脂層の厚みが薄いと、薄型電池の周囲を封止する封口材との接着がうまく行なわれず、封口部分における水分等の出入りを十分に抑制することができなくなる一方、この樹脂層の厚みが厚くなりすぎると、薄型電池の厚みが厚くなりすぎるため、この樹脂層の厚みを15μm〜150μmの範囲内にすることが好ましい。 [0015] Here, in this way Upon the positive electrode outer body and the negative electrode outer package to form a resin layer made of an electrically insulating resin on each of opposed faces, the thickness of the resin layer is thin, the thin battery not performed well adhesion with the sealing material for sealing the periphery, whereas it can not be sufficiently suppressed and out of moisture in the sealed portion, the thickness of the resin layer becomes too thick, thick thickness of the thin battery because it too, it is preferable that the thickness of the resin layer in the range of 15Myuemu~150myuemu.

【0016】また、この樹脂層を構成する樹脂としては、薄型電池の周囲を封止する封口材と適切に接着されて、封口部分における水分等の出入りを十分に抑制できるものを用いることが好ましく、例えば、ポリプロピレンやポリエチレンを用いることが好ましい。 [0016] The resin constituting the resin layer, is properly adhered to the sealing member for sealing the periphery of the thin battery, it is preferable to use a material that can be sufficiently suppressed and out of moisture in the sealing portion , for example, it is preferable to use a polypropylene or polyethylene.

【0017】なお、この発明における薄型電池は、上記のような構成を備えるものであればよく、その正極,負極及び電解質については特に限定されず、リチウム電池やアルカリ電池等において一般に使用されている各種の材料を使用することができる。 [0017] Incidentally, thin type battery of this invention may be those having the above configuration, there is no particular limitation on the positive electrode, negative electrode and an electrolyte, is commonly used in lithium batteries, alkaline batteries, etc. It may be used various materials. 尚、電解質としては、本実施例で示した液体を用いた場合以外に、ポリエチレンオキシド等に代表されるリチウムイオン導電性の固体電解質を使用することができる。 As the electrolyte, it may be used other than the case of using the liquid described in the present embodiment, a lithium ion conductive solid electrolyte typified by polyethylene oxide and the like.

【0018】 [0018]

【実施例】以下、この発明の実施例に係る薄型電池を添付図面に基づいて具体的に説明すると共に、比較例を挙げ、この発明の実施例における薄型電池においては、その厚みを薄くすることができると共に、サイクル特性が向上されることを明らかにする。 EXAMPLES Hereinafter, the specifically described on the basis of a thin battery according to an embodiment of the present invention in the accompanying drawings, comparative examples, the thin battery in an embodiment of the present invention is to reduce the thickness thereof it is, reveals that the cycle characteristics are improved. なお、この発明における薄型電池は、下記の実施例に示したものに限定されるものではなく、その要旨を変更しない範囲において適宜変更して実施できるものである。 Incidentally, thin type battery of the present invention is not limited to those shown in the following examples, in which can be carried out appropriately modified within a scope not changing the gist thereof.

【0019】(実施例1)この実施例においては、下記のようにして作製した正極と負極と非水電解液とを用い、図5及び図6に示すような縦9cm、横5cmになった薄型電池を作製した。 [0019] EXAMPLE 1 In this example, using a positive electrode, a negative electrode and a nonaqueous electrolyte was prepared as follows, was vertically 9cm, horizontal 5cm as shown in FIGS. 5 and 6 to prepare a thin battery.

【0020】[正極の作製]正極を作製するにあたっては、正極材料にコバルト酸リチウムLiCoO 2を使用し、このLiCoO 2と、導電剤である人造黒鉛と、結着剤であるポリフッ化ビニリデンとを80:10:10 [0020] In preparing the Preparation of positive electrode] The positive electrode using lithium cobalt oxide LiCoO 2 in the positive electrode material, this LiCoO 2, and artificial graphite as a conductive agent and polyvinylidene fluoride as a binder 80:10:10
の重量比で混合し、これにN−メチル−2−ピロリドンを加えてスラリー化させた。 It was mixed in a weight ratio, was slurried and added with N- methyl-2-pyrrolidone. そして、このスラリーを厚みが20μmのアルミニウム箔からなる正極集電体12 Then, the positive electrode current collector with the slurry is thick made of an aluminum foil of 20 [mu] m 12
の片面にドクターブレード法により塗布し、その後、これを真空中において150℃で2時間乾燥させて、上記の正極集電体12上に厚みが80μmになった正極11 It was applied by a doctor blade method on one surface of, after which it was dried for 2 hours at 0.99 ° C. in a vacuum, a positive electrode 11 having a thickness becomes 80μm on the positive electrode current collector 12 of the
を形成した。 It was formed.

【0021】[負極の作製]負極を作製するにあたっては、負極材料として、格子面(002)の面間隔d002 [0021] The order to prepare the Preparation of Negative Electrode] negative electrode, as an anode material, spacing of lattice planes (002) d002
が3.35Åで、c軸方向の結晶子の大きさLcが10 But at 3.35 Å, size Lc in the c-axis direction of the crystallites 10
00Å以上の炭素粉末を用い、この炭素粉末と、結着剤であるポリフッ化ビニリデンとを90:10の重量比で混合し、これにN−メチル−2−ピロリドンを加えてスラリー化させた。 Using carbon powder or Å, and the carbon powder and polyvinylidene fluoride as a binder were mixed in a weight ratio of 90:10, it was slurried and added with N- methyl-2-pyrrolidone. そして、このスラリーを厚みが20μ Then, this slurry thickness 20μ
mの銅箔からなる負極集電体22の片面にドクターブレード法により塗布し、その後、これを真空中において1 It was applied by a doctor blade method on one surface of the negative electrode current collector 22 made of a copper foil of m, in the subsequent vacuum in this 1
50℃で2時間乾燥させて、上記の負極集電体22上に厚みが80μmになった負極21を形成した。 50 for 2 hours and dried at ° C., to form a negative electrode 21 having a thickness becomes 80μm on the anode current collector 22 described above.

【0022】[非水電解液の作製]非水電解液を作製するにあたっては、エチレンカーボネートとジエチルカーボネートとを1:1の体積比で混合させた混合溶媒に、 [0022] In preparing the Preparation of Nonaqueous Electrolytic Solution] The non-aqueous electrolyte, ethylene carbonate and diethyl carbonate 1: a mixed solvent obtained by mixing at a volume ratio,
LiPF 6を1mol/lの割合で溶解させて非水電解液を作製した。 The LiPF 6 was used to fabricate a non-aqueous electrolyte solution was dissolved in a proportion of 1 mol / l.

【0023】[電池の作製]電池を作製するにあたっては、図5及び図6に示すように、正極外装体10及び負極外装体20として、それぞれ厚みが100μmになったアルミニウムの導電性板であって、その一部にそれぞれ外方に突出したリード部10a,20aが形成されたものを用いるようにした。 [0023] In fabricating a battery [Fabrication of Battery] As shown in FIGS. 5 and 6, as the positive electrode outer body 10 and the negative electrode outer package 20, a a conductive plate of aluminum thickness becomes 100μm respectively Te, and to use those lead portion 10a projecting respectively in a part outward, 20a are formed.

【0024】そして、上記のように正極集電体12上に形成された正極11と、負極集電体22上に形成された負極21との間に、上記の非水電解液を含浸させたポリプロピレン製の微多孔膜からなる膜厚が40μmになったセパレータ30を介在させて、これらを上記の正極外装体10と負極外装体20との間に挟み込むと共に、上記の正極外装体10と負極外装体20との周辺部分に電気絶縁性の変性ポリプロピレンからなる封口材40を設け、この封口材40によって正極外装体10と負極外装体20との間を封止させると共に、正極外装体10と負極外装体20とを電気的に絶縁させて薄型電池を作製した。 [0024] Then, between the positive electrode 11 formed on the positive electrode current collector 12 as described above, a negative electrode 21 formed on the anode current collector 22, impregnated with non-aqueous electrolyte solution of the thickness made of polypropylene microporous membrane with intervening separators 30 became 40 [mu] m, these together sandwiched between the positive electrode outer body 10 and the negative electrode outer package 20, the above-mentioned positive electrode outer body 10 and the negative electrode the sealing member 40 made of an electrically insulating modified polypropylene to the peripheral portion of the exterior body 20 is provided, causes sealed between the positive electrode outer body 10 and the negative electrode outer body 20 by the sealing member 40, the positive electrode outer body 10 to prepare a thin battery electrically to insulate the negative electrode outer package 20. なお、この薄型電池全体の厚みは、下記の表1に示すように0.44mmになっていた。 Incidentally, the thin battery total thickness, was supposed to 0.44mm as shown in Table 1 below.

【0025】(比較例1)比較例1の薄型電池においては、上記の実施例1における薄型電池のように、正極外装体10及び負極外装体20の一部にリード部10a, [0025] (Comparative Example 1) In the thin type battery of Comparative Example 1, as the thin battery in Example 1 above, the lead portion 10a in a part of the positive electrode outer body 10 and the negative electrode outer package 20,
20aを形成せずに、前記の図1及び図2に示したように、正極外装体10と負極外装体20の外面部分に、厚みが100μmになったアルミニウム製の導電性板で構成されたリード部51,52をそれぞれ正極外装体10 20a without forming, as shown in FIGS. 1 and 2 above, the outer surface portion of the positive electrode outer body 10 and the negative electrode outer package 20, the thickness is constituted by the aluminum conductive plate becomes 100μm the lead portions 51 and 52 the cathode outer body 10
や負極外装体20の外方に突出するように取り付け、それ以外については、上記の実施例1の場合と同様にして薄型電池を作製した。 Attached so as to protrude and the outside of the negative electrode outer package 20, for otherwise, to produce a thin type battery in the same manner as in Example 1 above. なお、この薄型電池全体の厚みは、下記の表1に示すように0.64mmになっていた。 Incidentally, the thin battery total thickness, was supposed to 0.64mm as shown in Table 1 below.

【0026】(比較例2)比較例2の薄型電池においても、上記の実施例1における薄型電池のように、正極外装体10及び負極外装体20の一部にリード部10a, [0026] (Comparative Example 2) even in a thin battery of Comparative Example 2, as the thin battery in Example 1 above, the lead portion 10a in a part of the positive electrode outer body 10 and the negative electrode outer package 20,
20aを形成せずに、上記の正極集電体12及び負極集電体22の厚みをそれぞれ100μmにし、前記の図3 20a without forming the 100μm above the positive electrode current collector 12 and the thickness of the negative electrode current collector 22, respectively, wherein Figure 3
及び図4に示したように、正極集電体12及び負極集電体22の一部をそれぞれ封口材40よりも電池の外方に突出させて各リード部12a,22aを設けるようにし、それ以外については、上記の実施例1の場合と同様にして薄型電池を作製した。 And as shown in FIG. 4, the lead portion 12a to protrude outside the cell than a portion of the cathode current collector 12 and the negative electrode collector 22, respectively sealing member 40, so as to provide a 22a, it for other, to prepare a thin type battery in the same manner as in example 1 above. なお、この薄型電池全体の厚みは、下記の表1に示すように0.60mmになっていた。 Incidentally, the thin battery total thickness, was supposed to 0.60mm as shown in Table 1 below.

【0027】(実施例2)実施例2の薄型電池においては、上記の実施例1における薄型電池において、図7に示すように、正極外装体10と負極外装体20とが対向するそれぞれの面に、正極集電体12又は負極集電体2 [0027] In the thin battery (Example 2) Example 2, the thin battery of Example 1 above, as shown in FIG. 7, each of the surface and the positive electrode outer body 10 and the negative electrode outer package 20 faces , the positive electrode current collector 12 or the negative electrode current collector 2
2との接続部14,24を除いて、膜厚が100μmになった電気絶縁性のポリプロピレン樹脂からなる樹脂層13,23を設け、それ以外については、上記の実施例1の場合と同様にして、正極外装体10及び負極外装体20の一部に外方に突出したリード部10a,20aが形成された薄型電池を作製した。 Except for the connection portions 14, 24 of the 2, thickness of the resin layer 13, 23 is provided made of an electrically insulating polypropylene resin became 100 [mu] m, about it, except, in the same manner as in Example 1 above Te, to prepare a thin battery lead portion 10a projecting outward, 20a are formed in a part of the positive electrode outer body 10 and the negative electrode outer package 20. なお、この薄型電池全体の厚みは、下記の表1に示すように0.64mmになっていた。 Incidentally, the thin battery total thickness, was supposed to 0.64mm as shown in Table 1 below.

【0028】(比較例3)比較例3の薄型電池においては、上記の比較例1の薄型電池において、その正極外装体10と負極外装体20とが対向するそれぞれの面に、 [0028] In Comparative Example 3 thin battery of Comparative Example 3, the thin battery of Comparative Example 1 above, on each side of its positive electrode outer body 10 and the negative electrode outer package 20 are opposed,
上記の実施例2の場合と同様に、正極集電体12や負極集電体22と接続させる接続部14,24を除いて、膜厚が100μmになった電気絶縁性のポリプロピレン樹脂からなる樹脂層13,23を設け、それ以外は、上記の比較例1の場合と同様にして薄型電池を作製した。 As in Example 2 above, except for the connection portions 14 and 24 for connecting the positive electrode current collector 12 and the negative electrode current collector 22 made of a film thickness becomes 100μm electrically insulating polypropylene resin the layers 13 and 23 provided, otherwise, to produce a thin type battery in the same manner as in Comparative example 1 above. なお、この薄型電池全体の厚みは、下記の表1に示すように0.84mmになっていた。 Incidentally, the thin battery total thickness, was supposed to 0.84mm as shown in Table 1 below.

【0029】(比較例4)比較例4の薄型電池においては、上記の比較例2の薄型電池において、その正極外装体10と負極外装体20とが対向するそれぞれの面に、 [0029] In the thin battery (Comparative Example 4) Comparative Example 4, the thin battery of Comparative Example 2 above, on each side of its positive electrode outer body 10 and the negative electrode outer package 20 are opposed,
上記の実施例2の場合と同様に、正極集電体12や負極集電体22と接続させる接続部14,24を除いて、膜厚が100μmになった電気絶縁性のポリプロピレン樹脂からなる樹脂層13,23を設け、それ以外は、上記の比較例2の場合と同様にして薄型電池を作製した。 As in Example 2 above, except for the connection portions 14 and 24 for connecting the positive electrode current collector 12 and the negative electrode current collector 22 made of a film thickness becomes 100μm electrically insulating polypropylene resin the layers 13 and 23 provided, otherwise, to produce a thin type battery in the same manner as in Comparative example 2 above. なお、この薄型電池全体の厚みは、下記の表1に示すように0.80mmになっていた。 Incidentally, the thin battery total thickness, was supposed to 0.80mm as shown in Table 1 below.

【0030】次に、上記のようにして作製した実施例1,2及び比較例1〜4の各薄型電池をそれぞれ50m [0030] Next, 50m above manner each thin batteries of Examples 1 and 2 and Comparative Examples 1 to 4 were produced, respectively
Aの定電流で4.1Vまで充電を行なった後、50mA After performing a charging up to 4.1V at a constant current of A, 50mA
の定電流で2.8Vまで放電を行ない、これを1サイクルとして充放電を200回繰り返し、1サイクル目の放電容量Q1 と200サイクル目の放電容量Q200 とを測定し、下記の式に基づいて、1サイクル当たりの放電容量の劣化率(サイクル劣化率)を求め、その結果を下記の表1に合わせて示した。 Of it performs discharging to 2.8V with a constant current, which repeatedly charged and discharged 200 times as one cycle, and measuring the first cycle discharge capacity Q1 and 200 th cycle discharge capacity Q200, based on the following formula , the deterioration rate of the discharge capacity per cycle (cycle degradation rate) determined, are also shown the results in Table 1 below. サイクル劣化率(%/サイクル)=(Q1 −Q200 )× Cycle deterioration rate (% / cycle) = (Q1 -Q200) ×
100/Q1 ×200 100 / Q1 × 200

【0031】 [0031]

【表1】 [Table 1]

【0032】この結果から明らかなように、正極外装体10及び負極外装体20の一部にそれぞれ外方に突出したリード部10a,20aを形成した実施例1,2の各薄型電池は、それぞれ対応する比較例1,2の薄型電池や、比較例3,4の薄型電池に比べて電池厚みが薄くなっていた。 [0032] As apparent from the results, the thin battery of the positive electrode outer body 10 and the lead portions 10a, Examples 1 and 2 were formed 20a of each part of the negative electrode outer package 20 projecting outwardly, respectively thin battery and the corresponding Comparative examples 1 and 2, the battery thickness was thinner than the thin battery of Comparative examples 3 and 4.

【0033】また、正極外装体10と負極外装体20とが対向するそれぞれの面に樹脂層13,23を設けなかった実施例1の薄型電池と樹脂層13,23を設けた実施例2の薄型電池とを比較すると、電池の厚みは樹脂層13,23を設けていない実施例1の薄型電池の方が薄くなるが、樹脂層13,23を設けた実施例2の薄型電池においては、実施例1の薄型電池に比べてサイクル劣化率が低くなり、サイクル特性が向上していた。 Further, in Example 2 in which a positive electrode outer body 10 and the negative electrode outer body 20 and is a thin battery of Example 1 the resin layer 13, 23 is not provided on each of opposed faces resin layers 13 and 23 comparing the thin battery, the thickness of the battery, but towards the thin battery of example 1 not provided with the resin layer 13, 23 is thin, the thin battery of example 2 in which a resin layer 13, 23, cycle deterioration rate becomes lower than the thin battery of example 1 had improved cycle characteristics.

【0034】(実施例3〜5)実施例3〜5の薄型電池においては、上記の実施例2における薄型電池において、正極外装体10及び負極外装体20に使用する導電性板を構成する材料だけを下記の表2に示すように変更し、実施例3ではニッケル、実施例4ではSUS304 The material in the thin battery (Example 3-5) Example 3-5, which constitute the thin battery, a conductive plate used in the positive electrode outer body 10 and the negative electrode outer package 20 in Example 2 above change only as shown in Table 2 below, example 3, nickel, in example 4 SUS304
のステンレス鋼、実施例5では鉄からなる厚みが100 Stainless steel, thickness consisting Example 5 In iron 100
μm導電性板を用い、それ以外については、上記の実施例2の場合と同様にして各薄型電池を作製した。 Using μm conductive plate, for otherwise, to produce a respective thin battery in the same manner as in Example 2 above. なお、 It should be noted that,
これらの薄型電池全体の厚みは、下記の表2に示すように全て0.64mmになっていた。 These thin battery total thickness, had become all as shown in Table 2 below 0.64 mm.

【0035】そして、これらの実施例3〜5の各薄型電池についても、前記の場合と同様にしてサイクル劣化率を求め、その結果を、上記の実施例2の薄型電池と合わせて下記の表2に示した。 [0035] Then, for the respective thin batteries of Examples 3-5 to obtain the cycle deterioration rate in the same manner as in the above, the results of the following in conjunction with thin cell of Example 2 above table It is shown in 2.

【0036】 [0036]

【表2】 [Table 2]

【0037】この結果から明らかなように、正極外装体10及び負極外装体20を構成する導電性板にアルミニウム,ニッケル,SUS304のステンレス鋼で構成された導電性板を用いた実施例2〜4の各薄型電池は、鉄で構成された導電性板を用いた実施例5の薄型電池に比べてサイクル劣化率が低くなってサイクル特性が向上していた。 [0037] As is apparent from this result, aluminum conductive plate constituting the positive electrode outer body 10 and the negative electrode outer package 20, nickel, Examples 2-4 using a conductive plate made of a stainless steel SUS304 each thin battery of the cycle deterioration rate as compared to a thin battery of example 5 using a conductive plate made of iron had improved cycle characteristics is lowered.

【0038】(実施例6,7)実施例6,7の薄型電池においては、上記の実施例2における薄型電池において、正極外装体10及び負極外装体20に使用するアルミニウムの導電性板の厚みだけを下記の表3に示すように変更し、実施例6ではその厚みを10μm、実施例7 [0038] In the thin battery (Example 6) Example 6 and 7, the thin battery of Example 2 above, the thickness of the aluminum of the conductive plate to be used for the positive electrode outer body 10 and the negative electrode outer package 20 change only as shown in Table 3 below, in examples 6 10 [mu] m and the thickness, example 7
ではその厚みを200μmにし、それ以外については、 In the its thickness to 200μm, except for it,
上記の実施例2の場合と同様にして各薄型電池を作製した。 To produce a respective thin battery in the same manner as in Example 2 above. なお、これらの薄型電池全体の厚みは下記の表3に示す通りであった。 Note that these thin battery total thickness was as shown in Table 3 below.

【0039】そして、これらの実施例6,7の各薄型電池についても、前記の場合と同様にしてサイクル劣化率を求め、その結果を、上記の実施例2の薄型電池と合わせて下記の表3に示した。 [0039] Then, for the respective thin batteries of Examples 6 and 7, determine the cycle deterioration rate in the same manner as in the above, the results of the following in conjunction with thin cell of Example 2 above table It is shown in 3.

【0040】 [0040]

【表3】 [Table 3]

【0041】この結果、正極外装体10及び負極外装体20を構成するアルミニウムの導電性板の厚みを10μ [0041] As a result, 10 [mu] a thickness of the aluminum of the conductive plate constituting the positive electrode outer body 10 and the negative electrode outer package 20
mと薄くした実施例6の薄型電池の場合には、実施例2 In the case of a thin battery of Example 6 was thin and m is Example 2
の薄型電池に比べて、電池の厚みが薄くなったが、サイクル劣化率の値が大幅に増加して、サイクル特性が大きく低下していた。 Compared to the thin battery, the thickness of the battery is thin, the value of the cycle degradation rate is increased significantly, the cycle characteristics were greatly reduced. 一方、導電性板の厚みを200μmと厚くした実施例7の薄型電池の場合には、実施例2の薄型電池に比べて、若干サイクル劣化率が低くなってサイクル特性が向上していたが、電池の厚みが厚くなっていた。 On the other hand, the thickness of the conductive plate in the case of a thin battery of Example 7 was as thick as 200μm, as compared to a thin battery of Example 2, although slightly cycle deterioration rate was improved cycle characteristics is lowered, the thickness of the battery had become thicker.

【0042】(実施例8,9)実施例8,9の薄型電池においては、上記の実施例2における薄型電池において、正極外装体10と負極外装体20とが対向するそれぞれの面に設ける樹脂層13,23の材料だけを下記の表4に示すように変更し、実施例8ではポリ塩化ビニルを、実施例9ではポリブチレンを用いて、それぞれ膜厚が100μmになった樹脂層13,23を設けるようにし、それ以外については、上記の実施例2の場合と同様にして各薄型電池を作製した。 [0042] In the thin battery (Example 8, 9) Examples 8 and 9, the thin battery of Example 2 above, resin provided on each side of the positive electrode outer body 10 and the negative electrode outer package 20 faces change only material of layer 13 and 23, as shown in Table 4 below, the polyvinyl chloride in example 8, using a polybutylene example 9, the resin layer thickness respectively became 100 [mu] m 13 and 23 the so provided, for otherwise, to produce a respective thin battery in the same manner as in example 2 above. なお、これらの薄型電池全体の厚みは、下記の表4に示すように全て0.64m Note that these thin battery total thickness, all as shown in Table 4 below 0.64m
mであった。 It was m.

【0043】そして、これらの実施例8,9の各薄型電池についても、前記の場合と同様にしてサイクル劣化率を求め、その結果を、上記の実施例2の薄型電池と合わせて下記の表4に示した。 [0043] Then, for the respective thin batteries of Examples 8 and 9 to obtain the cycle deterioration rate in the same manner as in the above, the results, the following table together with the thin cell of Example 2 above 4 shown in.

【0044】 [0044]

【表4】 [Table 4]

【0045】この結果、正極外装体10と負極外装体2 [0045] As a result, the positive electrode outer casing 10 and the negative electrode outer casing 2
0とが対向するそれぞれの面に設ける樹脂層13,23 0 and is provided on each of opposed faces resin layers 13 and 23
の材料にポリプロピレンを用いた場合に、一番サイクル劣化率の値が低くなってサイクル特性が向上しており、 In the case of using polypropylene material, it has improved cycle characteristics value of the most cycle degradation rate is lowered,
次いで、ポリブチレン、ポリ塩化ビニルの順になっていた。 Then, it had become polybutylene, in the order of polyvinyl chloride. これは、前記のように樹脂層13,23を構成する樹脂にポリプロピレンを用いた場合に、薄型電池の周囲を封止する前記の封口材40とこれらの樹脂層13,2 This, in the case of using the polypropylene resin constituting the resin layer 13, 23 as described above, said sealing member 40 and these resin layers for sealing the periphery of the thin battery 13, 2
3が適切に接着されて、封口部分における水分等の出入りを十分に抑制できるようになったためであると考えられる。 3 is properly adhered, presumably because now be sufficiently suppressed and out of moisture in the sealing portion.

【0046】(実施例10,11)実施例10,11の薄型電池においては、上記の実施例2における薄型電池において、正極外装体10と負極外装体20とが対向するそれぞれの面にポリプロピレンからなる樹脂層13, [0046] In the thin battery (Example 10 and 11) Examples 10 and 11, the thin battery of Example 2 above, polypropylene on each side of the positive electrode outer body 10 and the negative electrode outer package 20 faces comprising the resin layer 13,
23を設けるにあたり、この樹脂層13,23の膜厚だけを、下記の表5に示すように、実施例10では10μ Upon providing the 23, only the thickness of the resin layer 13 and 23, as shown in Table 5 below, in Example 10 10 [mu]
m、実施例11では200μmに変更し、それ以外については、上記の実施例2の場合と同様にして各薄型電池を作製した。 m, was changed to 200μm Example 11, for otherwise, to produce a respective thin battery in the same manner as in Example 2 above. なお、これらの薄型電池全体の厚みは下記の表5に示す通りであった。 Note that these thin battery total thickness was as shown in Table 5 below.

【0047】そして、これらの実施例10,11の各薄型電池についても、前記の場合と同様にしてサイクル劣化率を求め、その結果を、上記の実施例2の薄型電池と合わせて下記の表5に示した。 [0047] Then, for the respective thin batteries of Examples 10 and 11, determine the cycle deterioration rate in the same manner as in the above, the results of the following in conjunction with thin cell of Example 2 above table 5 shown in.

【0048】 [0048]

【表5】 [Table 5]

【0049】この結果、正極外装体10と負極外装体2 [0049] As a result, the positive electrode outer casing 10 and the negative electrode outer casing 2
0とが対向するそれぞれの面に設ける樹脂層13,23 0 and is provided on each of opposed faces resin layers 13 and 23
の厚みを10μmと薄くした実施例10の薄型電池の場合には、実施例2の薄型電池に比べて、電池の厚みが薄くなったが、サイクル劣化率の値が増加して、サイクル特性がかなり低下していた。 Of in the case of a thin battery of Example 10 was as thin as 10μm thickness, as compared to a thin battery of Example 2, the thickness of the battery is thin, an increase value of the cycle deterioration rate, cycle characteristics It had been considerably reduced. 一方、樹脂層13,23の厚みを200μmと厚くした実施例11の薄型電池の場合には、実施例2の薄型電池に比べて、若干サイクル劣化率が低くなって、サイクル特性が向上していたが、電池の厚みが厚くなっていた。 On the other hand, in the case of a thin battery of Example 11 in which the thickness of the resin layer 13 and 23 is increased to 200μm, as compared to a thin battery of Example 2, slightly lower cycle degradation rate, has improved cycle characteristics It was, but the thickness of the battery had become thicker.

【0050】 [0050]

【発明の効果】以上詳述したように、この発明における薄型電池においては、正極外装体及び負極外装体の一部をそれぞれ外方に突出させてそれぞれのリード部を形成するようにしたため、正極外装体や負極外装体に別個の導電性板からなるリード部を取り付ける場合や、正極集電体や負極集電体の厚みを厚くして、これらの集電体の一部を電池の外方に突出させてリード部を設ける場合に比べて、薄型電池における厚みを薄くすることができるようになった。 As described in detail above, in the thin type battery of the present invention, since so as to form respective lead portions by projecting a part of the positive electrode outer body and the negative electrode outer body outward, respectively, the positive electrode and when mounting the lead portion formed of separate conductive plate on the exterior body and the negative electrode outer package, by increasing the thickness of the positive electrode current collector and negative electrode current collector, the outer side of the battery part of the current collector to protrude in as compared with the case of providing the lead portion, it becomes possible to reduce the thickness of the thin battery.

【0051】このため、この発明における薄型電池においては、その厚みを薄くするために、正極外装体や負極外装体又正極や負極の厚みを薄くする必要がなく、十分な強度を有してサイクル特性に優れると共に、十分な電池容量を有する薄型電池が得られた。 [0051] Therefore, in the thin type battery of the present invention, in order to reduce the thickness, the cathode exterior body and the negative electrode outer package also not necessary to reduce the thickness of the positive electrode and the negative electrode, the cycle has a sufficient strength It is excellent in properties, thin battery with a sufficient battery capacity was obtained.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】正極外装体と負極外装体の外面部分に別個にリード部を設けた従来の薄型電池の概略斜視図である。 1 is a schematic perspective view of a conventional thin battery is provided separately the lead portion to outer surface portion of the positive electrode outer body and the negative electrode outer package.

【図2】図1に示した従来の薄型電池の概略断面図である。 Is a schematic cross-sectional view of a conventional thin battery shown in FIG. 1;

【図3】正極集電体と負極集電体の一部を電池の外方に突出させてリード部を設けた従来の薄型電池の概略斜視図である。 [3] part of the positive electrode current collector and the anode current collector to protrude outward of the battery is a schematic perspective view of a conventional thin battery having a lead portion.

【図4】図3に示した従来の薄型電池の概略断面図である。 4 is a schematic cross-sectional view of a conventional thin battery shown in FIG.

【図5】この発明の実施例1における薄型電池の概略斜視図である。 5 is a schematic perspective view of a thin battery according to the first embodiment of the present invention.

【図6】上記の実施例1における薄型電池の概略断面図である。 6 is a schematic cross-sectional view of a thin battery in Example 1 above.

【図7】この発明の実施例2における薄型電池の概略断面図である。 7 is a schematic sectional view of a thin battery according to the second embodiment of the present invention.

【符号の説明】 DESCRIPTION OF SYMBOLS

10 正極外装体 20 負極外装体 10a,20a リード部 11 正極 21 負極 10 positive electrode outer package 20 negative electrode outer body 10a, 20a leads 11 positive electrode 21 negative

───────────────────────────────────────────────────── フロントページの続き (72)発明者 藤本 正久 大阪府守口市京阪本通2丁目5番5号 三 洋電機株式会社内 (72)発明者 能間 俊之 大阪府守口市京阪本通2丁目5番5号 三 洋電機株式会社内 (72)発明者 西尾 晃治 大阪府守口市京阪本通2丁目5番5号 三 洋電機株式会社内 ────────────────────────────────────────────────── ─── of the front page continued (72) inventor Masahisa Fujimoto Osaka Prefecture Moriguchi Keihanhondori 2-chome No. 5 No. 5 Sanyo within Co., Ltd. (72) invention's ability between Toshiyuki Osaka Prefecture Moriguchi Keihanhondori 2-chome No. 5 No. 5 Sanyo within Co., Ltd. (72) inventor Nishio AkiraOsamu Osaka Prefecture Moriguchi Keihanhondori 2-chome No. 5 No. 5 Sanyo electric Co., Ltd. in

Claims (4)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 導電性板からなる正極外装体と負極外装体とが電気的に絶縁されると共に、この正極外装体と負極外装体との間に正極と負極と電解質とが設けられてなる薄型電池において、上記の正極外装体及び負極外装体の一部がそれぞれ外方に突出されてそれぞれにリード部が形成されてなることを特徴とする薄型電池。 [Claim 1] with made of a conductive plate positive Gokugaiso body and the negative electrode outer body is electrically insulated, positive and negative electrodes and an electrolyte is provided between the positive electrode outer body and the negative electrode outer body in the thin type batteries, thin battery, wherein a portion of the positive electrode outer body and the negative electrode outer package is formed by lead portions respectively protrude outward respectively formed.
  2. 【請求項2】 請求項1に記載した薄型電池において、 2. A thin battery according to claim 1,
    上記の正極外装体と負極外装体を構成する導電性板の厚みが15μm〜150μmの範囲内であることを特徴とする薄型電池。 Thin battery thickness of the conductive plate constituting the positive electrode outer body and the negative electrode outer package is being in the range of 15Myuemu~150myuemu.
  3. 【請求項3】 請求項1又は2に記載した薄型電池において、少なくとも上記の正極外装体と負極外装体とが対向するそれぞれの面に、正極又は負極との接続部を残して電気絶縁性の樹脂からなる樹脂層が形成されてなることを特徴とする薄型電池。 3. A thin battery according to claim 1 or 2, on each side of the at least the positive electrode outer body and the negative electrode outer body are opposed, electrically insulating leaving connecting portions of the positive electrode or the negative electrode thin battery, wherein a resin layer made of resin is formed.
  4. 【請求項4】 請求項3に記載した薄型電池において、 In the thin type battery as set forth in claim 3,
    上記の樹脂層の厚みが15μm〜150μmの範囲内であることを特徴とする薄型電池。 Thin battery, wherein the thickness of the resin layer is in the range of 15Myuemu~150myuemu.
JP27296697A 1997-10-06 1997-10-06 Thin battery Pending JPH11111262A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27296697A JPH11111262A (en) 1997-10-06 1997-10-06 Thin battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27296697A JPH11111262A (en) 1997-10-06 1997-10-06 Thin battery

Publications (1)

Publication Number Publication Date
JPH11111262A true JPH11111262A (en) 1999-04-23

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005006467A1 (en) * 2003-07-11 2005-01-20 Lg Chem, Ltd. Secondary battery with an improved safety
JP2011523163A (en) * 2008-04-29 2011-08-04 インフィニット パワー ソリューションズ, インコーポレイテッド Robust metal membrane encapsulation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005006467A1 (en) * 2003-07-11 2005-01-20 Lg Chem, Ltd. Secondary battery with an improved safety
US9065152B2 (en) 2003-07-11 2015-06-23 Lg Chem, Ltd. Secondary battery with an improved safety
JP2011523163A (en) * 2008-04-29 2011-08-04 インフィニット パワー ソリューションズ, インコーポレイテッド Robust metal membrane encapsulation

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