JPH0527228B2 - - Google Patents
Info
- Publication number
- JPH0527228B2 JPH0527228B2 JP59190778A JP19077884A JPH0527228B2 JP H0527228 B2 JPH0527228 B2 JP H0527228B2 JP 59190778 A JP59190778 A JP 59190778A JP 19077884 A JP19077884 A JP 19077884A JP H0527228 B2 JPH0527228 B2 JP H0527228B2
- Authority
- JP
- Japan
- Prior art keywords
- battery
- insulating member
- heat
- annular insulating
- sheet
- 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.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
- H01M6/16—Cells with non-aqueous electrolyte with organic electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/04—Cells with aqueous electrolyte
- H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
- H01M6/12—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with flat electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Primary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Description
〔産業上の利用分野〕
本発明は平板型リチウム電池に関し、更に電池
外部とのシール性を大幅に改善した長期信頼性に
優れる平板型リチウム電池の製造方法に関するも
のである。
〔従来の技術〕
従来、１対のシート状金属端子板の間に積層状
の発電要素を保有せしめるとともに、前記１対の
シート状金属端子板の周辺端部の間に環状絶縁部
材として、本発明のフツ素樹脂以外の合成樹脂を
挾込み、前記発電要素を密封した偏平電池が知ら
れていた。例えば実開昭58−176366号公報にこの
ような従来の電池構造と環状絶縁部材が開示され
ている。しかし本発明の環状絶縁部材を用いた電
池の製造法についての公知文献等は見られなかつ
た。
〔発明が解決しようとする問題点〕
しかし従来のルクランシエ型電池のように、こ
の構成外装材（シート状金属端子板）及び環状絶
縁部材を用いてリチウム電池を製造すると、長期
信頼性を有する電池は得られない。すなわち平板
型リチウム電池における環状絶縁部材の具備すべ
き特性は次の通りである。
すなわち、
(1) 耐電解性に優れていること
１モルの過塩素酸リチウムを含有したプロピレ
ンカーボネートからなる有機電解液に接触した状
態で溶解、膨潤しないこと。
(2) ニツケル、ステンレスなどのシート状金属端
子板との接着性が良好なこと。
前記の有機電解液に接した状態で、接着性が
低下せず良好なこと。
(3) 電池の外部からの水分侵入に対して十分なバ
リヤー性を有すること。
一般に、リチウム電池は負極活物質として金属
リチウムを用いている。リチウムは
Li＋H2Ｏ→LiOH＋１／2H2
の反応により、水と反応して水酸化リチウムを生
成すると同時に水素ガスを発生する。この水酸化
リチウムは発電要素としては働かない不要物質で
あり、リチウム表面がこの水酸化リチウムで被わ
れてしまうと、電池の内部抵抗が大きくなり、電
池反応が著しく阻害される。一方、水素ガス発生
により電池がふくらみ、電池内部抵抗が増大し、
電流が取り出せないなどの現象が見られ、電池の
外部からの水分侵入は完全に遮断しなければなら
ない。
これに対して、従来電池の環状絶縁部材はエチ
レン−酢酸ビニル、ポリエチレン、ポリアミドレ
ジン等の熱溶融性の合成樹脂を用いており、これ
らの合成樹脂を用いて製造された平板型リチウム
電池は前記特性条件を十分に満足出来るレベルで
はない。
そこで、本発明で使用するヒートシール性と金
属との接着性を有したフツ素樹脂を環状絶縁部材
に用いた場合と、従来の比較材として変性ポリエ
チレンを環状絶縁部材に用いて、第４図の如く空
セルを作り、アルゴン雰囲気中で有機電解液を注
入封止し、セルを80℃、RH90〜95％の恒温恒湿
槽内に貯蔵して、セル外部から侵入する水分量を
測定した結果、第１表に示す如く15日間の貯蔵
で、従来の比較材はフツ素樹脂に比べて約６倍の
水分量が検出された。データはｎ＝３の平均値で
ある。このようにフツ素樹脂のシール性が優れて
いることが分る。
[Industrial Application Field] The present invention relates to a flat lithium battery, and more particularly to a method for manufacturing a flat lithium battery that has significantly improved sealing performance with the outside of the battery and has excellent long-term reliability. [Prior Art] Conventionally, a laminated power generating element is held between a pair of sheet-shaped metal terminal plates, and a ring-shaped insulating member of the present invention is held between the peripheral ends of the pair of sheet-shaped metal terminal plates. Flat batteries have been known in which a synthetic resin other than fluororesin is sandwiched and the power generating element is sealed. For example, such a conventional battery structure and annular insulating member are disclosed in Japanese Utility Model Application Publication No. 58-176366. However, no known literature was found regarding a method for manufacturing a battery using the annular insulating member of the present invention. [Problems to be solved by the invention] However, if a lithium battery is manufactured using this structural exterior material (sheet-shaped metal terminal plate) and annular insulating member like the conventional Lecrancier type battery, the battery will have long-term reliability. cannot be obtained. That is, the characteristics that the annular insulating member in a flat plate lithium battery should have are as follows. That is, (1) It must have excellent electrolytic resistance. It must not dissolve or swell when in contact with an organic electrolyte consisting of propylene carbonate containing 1 mole of lithium perchlorate. (2) Good adhesion to sheet metal terminal plates such as nickel and stainless steel. Good adhesion without deterioration when in contact with the organic electrolyte. (3) The battery must have sufficient barrier properties against moisture intrusion from outside the battery. Generally, lithium batteries use metallic lithium as a negative electrode active material. Lithium reacts with water through the reaction Li+H 2 O→LiOH+1/2H 2 to produce lithium hydroxide and at the same time generate hydrogen gas. This lithium hydroxide is an unnecessary substance that does not function as a power generation element, and if the lithium surface is covered with this lithium hydroxide, the internal resistance of the battery will increase and the battery reaction will be significantly inhibited. On the other hand, the battery swells due to hydrogen gas generation, increasing the internal resistance of the battery.
Phenomena such as the inability to draw current have been observed, and moisture intrusion from the outside of the battery must be completely blocked. On the other hand, the annular insulating member of conventional batteries uses heat-melting synthetic resins such as ethylene-vinyl acetate, polyethylene, and polyamide resin, and flat plate lithium batteries manufactured using these synthetic resins are It is not at a level that fully satisfies the characteristic conditions. Therefore, the results are shown in Fig. 4, in which a fluororesin having heat-sealability and adhesion to metal used in the present invention is used for the annular insulating member, and a conventional comparative material, modified polyethylene, is used in the annular insulating member. An empty cell was made as shown below, an organic electrolyte was injected and sealed in an argon atmosphere, and the cell was stored in a constant temperature and humidity chamber at 80℃ and RH90-95%, and the amount of water entering from the outside of the cell was measured. As a result, as shown in Table 1, after 15 days of storage, the moisture content of the conventional comparative material was about 6 times that of the fluororesin. Data are average values of n=3. It can thus be seen that the fluororesin has excellent sealing properties.
上記問題点を解決するためにこの発明は、フツ
素樹脂の環状絶縁部材と正極及び負極のシート状
金属端子板とを予じめ十分な温度T1で加熱融着
し、次にこれらの電極板間に発電要素を組込んだ
状態でシート状端子板周辺部を前記温度T1より
も低く、かつ電池発電要素に熱的な悪影響を及ぼ
さない温度T2、すなわちT1＞T2なる温度関係で
電池製造し、ふくらみのない、かつ電池内部のシ
ヨート、及びシール外周部の端子間のシヨートを
防止した。
〔作用〕
本発明者は、シール材のフツ素樹脂と金属の熱
融着を出来るだけ低い温度で行なうための方法を
探索した。その結果、フツ素樹脂同志を熱融着す
るのが最も低い温度であることに注目し、第１図
の如く一方のシート状金属板１に環状絶縁部材
（フツ素樹脂）９を予じめ温度T1で熱融着し、他
方のシート状金属板８にも環状絶縁部材（フツ素
樹脂）９を予じめ温度T1で熱融着したもの同志
をもう一度、温度T2で熱融着し、熱融着する温
度T1とT2の最少値を測定した結果、
T1（min）＞T2（min） (1)
なる関係であることが判つた。そこで上式(1)の条
件で電池を組立て製造した結果、ふくらみのない
かつ電池内部のシヨート、及びシール外周部の端
子間のシヨートのない電池が製造出来ることが判
つた。ヒートシール性と金属との接着性を有した
フツ素樹脂には、４フツ化エチレン−パ−フロロ
アルコキシエチレン共重合樹脂（PFA）、４フツ
化エチレン−６フツ化プロピレン共重合樹脂
（FEP）、エチレン−４フツ化エチレン共重合樹
脂（ETFE）、３フツ化塩化エチレン樹脂
（PCTFE）、フツ化ビニリデン樹脂（PVDF）、ポ
リフツ化ビニル樹脂（PVF）などが挙げられる。
〔実施例〕
以下にこの発明を実施例にもとづいて説明す
る。
第１図は本発明を適用した平板型リチウム電池
の実施例で、電池サイズは40×40×0.5mmである。
図中、１は負極端子を兼ねるシート状金属端子
板で厚みが20〜100μのニツケルまたはステンレ
ス等の金属板である。このシート状ニツケル端子
板１の内面に、金属ネツト２が電気溶接されてい
る。３は負極活物質であるリチウムで、金属ネツ
ト２に圧着されたのち、ローラーにより金属ネツ
ト２に完全に充填密着されている。４は電気的に
絶縁性のあるセパレータである。５は注射器で注
入されたプロピレンカーボネートを主成分とした
非水性の電解液である。６は二酸化マンガンを主
体とする正極合剤である。７は２と同じく金属ネ
ツトであり、正極合剤６に対して一部もしくは全
部が埋設され、正極合剤６とよく密着されてい
る。８は正極端子を兼ねるシート状金属端子板で
厚みが20〜100μである。この８はニツケル、ス
テンレス、アルミニウム等の金属である。９は本
発明に係る環状絶縁部材でヒートシール性と金属
との接着性を有したフツ素樹脂で、厚み100μの
シートフイルムである。
組立方法としては、口の字形に切り出された環
状絶縁部材９をシート状金属端子１の周辺部に載
置し、環状絶縁部材の融点よりも高い約340℃の
ヒートパネル上で十分に熱接着し冷却する。次に
この一体化されたシート状金属端子板を下にし
て、順次、リチウム、セパレータ、電解液、正極
合剤等の各発電要素を積層し、最後に、前記と同
様にして一体化されたシート状金属端子板８、を
載置して固定される。
次に電池周辺部の封止方法であるが、前述のよ
うに固定された電池は、シート状金属端子板と環
状絶縁部材を熱融着した温度340℃以下の約270〜
280℃、即ち環状絶縁部材の融点に近い温度が望
ましく、しかも加熱時間を出来るだけ短い方法が
良い。本発明者はインパルス法による方法で電池
周辺部を同時熱融着した。
このようにして得た本発明電池Ａと従来方法で
得た電池Ｂにおいて、製造直後の電池のふくらみ
及び電池周辺部のシヨート個数を表２に示す。
データはｎ＝50である。
In order to solve the above problems, the present invention heat-fuses an annular insulating member made of fluororesin and sheet-shaped metal terminal plates of positive and negative electrodes at a sufficient temperature T 1 in advance, and then connects these electrodes. With the power generation element installed between the plates, the peripheral area of the sheet-like terminal plate is heated to a temperature T2 that is lower than the temperature T1 and does not have an adverse thermal effect on the battery power generation element, that is, a temperature where T1 > T2. In this regard, we manufactured a battery that does not bulge and prevents shorts inside the battery and between terminals on the outer periphery of the seal. [Function] The present inventor searched for a method for thermally fusing the fluororesin of the sealing material and the metal at the lowest possible temperature. As a result, we focused on the fact that the lowest temperature is the temperature for thermally fusing fluoroplastics together, and as shown in FIG. A ring-shaped insulating member (fluorocarbon resin) 9 was heat-sealed to the other sheet metal plate 8 at a temperature T 1 in advance, and then the same sheet metal plate 8 was heat-sealed again at a temperature T 2 . As a result of measuring the minimum values of the temperatures T 1 and T 2 at which the bonding and thermal fusion occur, it was found that the following relationship exists: T 1 (min)>T 2 (min) (1). Therefore, as a result of assembling and manufacturing a battery under the conditions of the above formula (1), it was found that it was possible to manufacture a battery with no bulges, no shorts inside the battery, and no shorts between the terminals on the outer periphery of the seal. Fluororesins with heat-sealability and adhesion to metal include tetrafluoroethylene-perfluoroalkoxyethylene copolymer resin (PFA) and tetrafluoroethylene-hexafluoropropylene copolymer resin (FEP). , ethylene-tetrafluoroethylene copolymer resin (ETFE), trifluorochloride ethylene resin (PCTFE), vinylidene fluoride resin (PVDF), polyvinyl fluoride resin (PVF), and the like. [Examples] The present invention will be described below based on Examples. FIG. 1 shows an example of a flat plate lithium battery to which the present invention is applied, and the battery size is 40 x 40 x 0.5 mm. In the figure, reference numeral 1 denotes a sheet metal terminal plate which also serves as a negative electrode terminal, and is a metal plate made of nickel or stainless steel with a thickness of 20 to 100 μm. A metal net 2 is electrically welded to the inner surface of this sheet-like nickel terminal plate 1. 3 is lithium which is a negative electrode active material, and after being pressed onto the metal net 2, it is completely filled and adhered to the metal net 2 by a roller. 4 is an electrically insulating separator. 5 is a non-aqueous electrolyte containing propylene carbonate as a main component, injected with a syringe. 6 is a positive electrode mixture mainly composed of manganese dioxide. Like 2, 7 is a metal net, which is partially or entirely buried in the positive electrode mixture 6 and is in close contact with the positive electrode mixture 6. 8 is a sheet metal terminal plate which also serves as a positive electrode terminal and has a thickness of 20 to 100 μm. This 8 is a metal such as nickel, stainless steel, or aluminum. Reference numeral 9 denotes an annular insulating member according to the present invention, which is a sheet film made of a fluororesin having heat-sealing properties and adhesion to metals and having a thickness of 100 μm. As for the assembly method, a ring-shaped insulating member 9 cut out in the shape of a mouth is placed around the sheet metal terminal 1, and the ring-shaped insulating member is sufficiently thermally bonded on a heat panel at a temperature of about 340°C, which is higher than the melting point of the ring-shaped insulating member. and cool. Next, each power generation element such as lithium, separator, electrolyte, positive electrode mixture, etc. was laminated one after another with this integrated sheet metal terminal plate facing down, and finally, the integrated sheet metal terminal plate was integrated in the same manner as above. A sheet metal terminal plate 8 is placed and fixed. Next, regarding the method of sealing the surrounding area of the battery, the battery fixed as described above is sealed at a temperature of approximately 270 to 340℃ or less, which is obtained by heat-sealing the sheet metal terminal plate and the annular insulating member.
It is preferable to use a temperature of 280° C., that is, close to the melting point of the annular insulating member, and to shorten the heating time as much as possible. The present inventor simultaneously heat-sealed the peripheral portion of the battery using an impulse method. Table 2 shows the bulge of the battery immediately after manufacture and the number of shoots in the peripheral area of the battery for the battery A of the present invention thus obtained and the battery B obtained by the conventional method. Data are n=50.
この発明は以上説明したように、シート状金属
端子板と環状絶縁部材を予じめ熱融着する温度
T1と電池組立最終の電池周辺部の熱融着する温
度T2において
T1＞T2
なる温度関係で製造したことにより、製造直後に
発生していた、明らかに加熱温度によると思われ
る不良、即ち電池ふくらみ及びシヨート等の発生
を防止する効果がある。
本発明は極薄で長期信頼性に優れる平板型リチ
ウム電池を提供することができ、ICカード薄型
電卓、時計、クリーテイングカード等に応用出
来、その工業的価値大なるものである。
As explained above, this invention has a temperature at which the sheet metal terminal plate and the annular insulating member are preliminarily fused together.
Due to manufacturing with a temperature relationship of T 1 > T 2 between T 1 and the temperature T 2 at which the peripheral part of the battery is thermally fused at the final stage of battery assembly, defects that occurred immediately after manufacturing were apparently caused by the heating temperature. That is, it has the effect of preventing battery bulges and shoots from occurring. The present invention can provide a flat plate lithium battery that is extremely thin and has excellent long-term reliability, and can be applied to IC cards, thin calculators, watches, cleaving cards, etc., and has great industrial value.
第１図はこの発明にかかる平板型リチウム電池
の製造組立方法を示した断面図、第２図はこの発
明にかかる完成電池の縦断面図、第３図は従来の
電池の製造組立方法を示した断面図、第４図は封
止剤（環状絶縁部材）の水分侵入テストに用いた
空セルの縦断面図である。
１……負極のシート状金属端子板、２……金属
ネツト、３……負板リチウム、４……セパレー
タ、５……電解液、６……正極合剤、７……金属
ネツト、８……正極のシート状金属端子板、９…
…環状絶縁部材、１０，１１……ヒーター。
FIG. 1 is a cross-sectional view showing a method for manufacturing and assembling a flat plate lithium battery according to the present invention, FIG. 2 is a longitudinal cross-sectional view of a completed battery according to the present invention, and FIG. 3 is a view showing a conventional method for manufacturing and assembling a battery. FIG. 4 is a vertical cross-sectional view of an empty cell used in the moisture penetration test of the sealant (annular insulating member). DESCRIPTION OF SYMBOLS 1... Negative electrode sheet metal terminal plate, 2... Metal net, 3... Negative plate lithium, 4... Separator, 5... Electrolyte, 6... Positive electrode mixture, 7... Metal net, 8... ...Positive electrode sheet metal terminal plate, 9...
...Annular insulating member, 10, 11...Heater.
Claims (1)
端子板の間に積層状の発電要素を保有せしめると
ともに、前記１対のシート状金属端子板の周辺端
部の間に環状絶縁部材を挾込み前記発電要素を密
封する平板型リチウム電池の製造法において、環
状絶縁部材がヒートシール性と金属との接着性を
有し、この環状絶縁部材と、正極及び負極のシー
ト状金属端子板とをそれぞれ加熱融着した後、こ
れら電極間に発電要素を組込んだ状態で前記環状
絶縁部材どうしをヒートシールすることを特徴と
する平板型リチウム電池の製造法。 ２ 前記環状絶縁部材と、正極及び負極のシート
状金属端子板とを加熱融着する温度T1と、前記
環状絶縁部材どうしをヒートシールする温度T2
が、T1＞T2であることを特徴とする特許請求の
範囲第１項記載の平板型リチウム電池の製造法。[Scope of Claims] 1. A laminated power generating element is held between a pair of sheet-shaped metal terminal plates formed in a predetermined shape, and a ring-shaped power generating element is held between the peripheral ends of the pair of sheet-shaped metal terminal plates. In a method for manufacturing a flat plate lithium battery in which an insulating member is inserted and the power generation element is sealed, the annular insulating member has heat-sealability and adhesion to metal, and the annular insulating member and the sheet metal of the positive electrode and the negative electrode are bonded to each other. A method for manufacturing a flat plate lithium battery, which comprises heat-sealing the annular insulating members to each other with a power generation element installed between the electrodes after heat-sealing the terminal plates. 2. Temperature T 1 for heat-sealing the annular insulating member and the sheet metal terminal plates of the positive and negative electrodes, and a temperature T 2 for heat-sealing the annular insulating members together.
The method for manufacturing a flat plate lithium battery according to claim 1, wherein T 1 >T 2 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59190778A JPS6168866A (en) | 1984-09-12 | 1984-09-12 | Manufacturing method of flat plate lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59190778A JPS6168866A (en) | 1984-09-12 | 1984-09-12 | Manufacturing method of flat plate lithium battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6168866A JPS6168866A (en) | 1986-04-09 |
| JPH0527228B2 true JPH0527228B2 (en) | 1993-04-20 |
Family
ID=16263571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59190778A Granted JPS6168866A (en) | 1984-09-12 | 1984-09-12 | Manufacturing method of flat plate lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6168866A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59127361A (en) * | 1983-01-10 | 1984-07-23 | Matsushita Electric Ind Co Ltd | Manufacturing method for flat batteries |
-
1984
- 1984-09-12 JP JP59190778A patent/JPS6168866A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6168866A (en) | 1986-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4567121A (en) | Insulating seal for electrochemical cells | |
| KR101131258B1 (en) | Housing for a sealed electrochemical battery cell | |
| CN102144315B (en) | Thin film battery | |
| US7781092B2 (en) | Secondary battery and method of manufacturing same | |
| CN101241976B (en) | Lead sealant film and non-aqueous electrolyte battery | |
| US20070202399A1 (en) | Secondary battery with advanced safety | |
| JPS58198864A (en) | Lithium battery | |
| JP2006073243A (en) | battery | |
| JPH02207450A (en) | Cylindrical organic electrolyte cell with ptc element | |
| JP4284719B2 (en) | Battery with spiral electrode and method for manufacturing the same | |
| JPH10289698A (en) | Thin sealed battery | |
| EP0081339A2 (en) | Sealing of electrochemical cells | |
| JP2001057185A (en) | Lithium secondary battery | |
| JPH0636801A (en) | Rectangular shape nonaqueous electrolyte secondary battery | |
| JP4925427B2 (en) | Laminated non-aqueous secondary battery | |
| JP3649792B2 (en) | Sealed battery | |
| JPH0648620B2 (en) | Manufacturing method of assembled sealing plate for organic electrolyte battery | |
| JP2004055372A (en) | Sealed battery | |
| JPS6168866A (en) | Manufacturing method of flat plate lithium battery | |
| JP2001102034A (en) | Battery lead wire, thin battery using the lead wire, and method of using battery lead wire | |
| JPH05325923A (en) | Flat type battery | |
| JPH11329397A (en) | Flat thin battery | |
| JP3594440B2 (en) | Sealed battery | |
| JPS60220553A (en) | Flat-type nonaqueous electrolyte cell | |
| JPS594447Y2 (en) | flat battery |