JPS61163559A - Flat cell - Google Patents
Flat cellInfo
- Publication number
- JPS61163559A JPS61163559A JP60005171A JP517185A JPS61163559A JP S61163559 A JPS61163559 A JP S61163559A JP 60005171 A JP60005171 A JP 60005171A JP 517185 A JP517185 A JP 517185A JP S61163559 A JPS61163559 A JP S61163559A
- Authority
- JP
- Japan
- Prior art keywords
- terminal plate
- insulating member
- outer periphery
- battery
- peripheral part
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
-
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
-
- 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
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、２枚のシート状端子板の外周辺部間、 に、
枠状の絶縁部材を介在させ、熱溶着により密封して形成
される電池室内に扁平な発電要素を収納した扁平形電池
の改良に関するものである。[Detailed Description of the Invention] Industrial Field of Application The present invention provides a method for forming a terminal plate between two sheet-like terminal plates, between the outer peripheries thereof,
This invention relates to an improvement in a flat battery in which a flat power generation element is housed in a battery chamber that is sealed by heat welding with a frame-shaped insulating member interposed therebetween.
従来の技術
従来、この種の扁平形電池として提案されている代表的
な電池の断面図を第６図に示す。第６図において１はス
テンレス鋼よりなる正極集電体を兼ねたシート状端子板
、２はその片面に塗着された二酸化マンガン主体の正極
合剤、３は電解液を含んだセパレータ、５はニッケル製
の負極集電体を兼ねたシート状端子板、４はこのシート
状端子板６の片面に圧着されたリチウムよシなる負極で
ある。７は正極および負極集電体をなすシート状端子板
１，６の周縁端部間に介在し、熱溶着により前記周縁を
密封する熱溶着性の変性ボリエテレンよりなる枠状の絶
縁部材である。2. Description of the Related Art FIG. 6 shows a cross-sectional view of a typical battery that has been proposed as this type of flat battery. In Fig. 6, 1 is a sheet-like terminal plate made of stainless steel that also serves as a positive electrode current collector, 2 is a positive electrode mixture mainly composed of manganese dioxide coated on one side of the terminal plate, 3 is a separator containing an electrolyte, and 5 is a A sheet-shaped terminal plate 4 which also serves as a negative electrode current collector made of nickel is a negative electrode made of lithium which is crimped onto one side of this sheet-shaped terminal plate 6. Reference numeral 7 denotes a frame-shaped insulating member made of heat-sealable modified polyethylene which is interposed between the peripheral edges of the sheet-like terminal plates 1 and 6 forming the positive and negative electrode current collectors, and seals the peripheral edges by thermal welding.
発明が解決しようとする問題点
このような従来の構成では、絶縁部材である変性ポリエ
チレンがある程度の透湿性をもつため。Problems to be Solved by the Invention In such a conventional structure, the modified polyethylene that is the insulating member has a certain degree of moisture permeability.
保存時間の経過とともに水分が電池内部に浸入し、負極
活物質のリチウムと反応して水素ガスが発生し、電池が
膨張するという問題があった。この対策として周辺端部
間の絶縁部材の厚みを小さくする方法と熱溶着面積を大
きくする方法とがあるが、周辺端部の絶縁部材の厚みを
あまり小さくすると正極と負極の端子板が接触して短絡
しやすくなる。There was a problem in that as storage time elapsed, moisture entered the battery and reacted with the lithium of the negative electrode active material to generate hydrogen gas, causing the battery to expand. As a countermeasure for this, there are two methods: reducing the thickness of the insulating material between the peripheral edges and increasing the heat welding area.However, if the thickness of the insulating material at the peripheral edges is made too small, the positive and negative terminal plates may come into contact with each other. short circuit easily.
また熱溶着面積を大きくすることは、電池活物質の配置
面積が相対的に小さくなることであり、容量減少をまね
くことになる。Furthermore, increasing the heat welding area means that the area where the battery active material is arranged becomes relatively small, which leads to a decrease in capacity.
本発明は、このような問題点を解決するもので、扁平形
電池の耐透湿性を向上させることを目的とするものであ
る。The present invention solves these problems and aims to improve the moisture permeation resistance of flat batteries.
問題点を解決するための手段
この問題点を解決するために本発明は、他方の端子板よ
りも大寸法とした一方の端子板の外周辺部を絶縁部材と
ともに小寸法の端子板の外周辺部をとり囲むように折り
曲げ、活物質の配置面積を減少させることなく、電池周
辺部の熱溶着面積を大きくして、水分の浸入による影響
を抑制したものである。Means for Solving the Problems In order to solve this problem, the present invention provides an outer periphery of one terminal board whose size is larger than that of the other terminal board together with an insulating member. By bending the battery so as to surround the battery, the thermally welded area around the battery is increased without reducing the active material placement area, thereby suppressing the influence of moisture intrusion.
作用
この構成により、電池内への水分の浸入経路の長さが、
従来よりも増大し、長期保存性に優れた扁平形電池を提
供することができた。Effect: This configuration reduces the length of the path for moisture to enter the battery.
It was possible to provide a flat battery that has a larger size than conventional batteries and has excellent long-term storage stability.
実施例
第１図は本発明の一実施例による扁平形電池の形成途中
の断面図であり、第２図は完成状態の電池の断面図であ
る。図において、１は集電板を兼ねたステンレス鋼より
なるシート状の正極端子板。Embodiment FIG. 1 is a cross-sectional view of a flat battery according to an embodiment of the present invention in the process of being formed, and FIG. 2 is a cross-sectional view of the completed battery. In the figure, 1 is a sheet-shaped positive terminal plate made of stainless steel that also serves as a current collector plate.
２は４３０’Ｃで６時間熱処理した二酸化マンガンから
なる活物質と、導電剤としてのカーボンとを混合し、こ
れにさらにフッ素樹脂のディスパージョンを加えて練合
しシート状に成形した正極合剤、３は電解質として過塩
素酸リチウムを溶解したプロピレンカーボネートを主体
とする非水電解液を含浸したポリプロピレン製不織布か
らなるセパレータ、４は負極活物質であるリチウム、６
はニッケルシートからなる負極端子板である。2 is a positive electrode mixture made by mixing an active material made of manganese dioxide heat-treated at 430'C for 6 hours and carbon as a conductive agent, and then kneading the mixture with a fluororesin dispersion and forming it into a sheet. , 3 is a separator made of a polypropylene nonwoven fabric impregnated with a nonaqueous electrolyte mainly composed of propylene carbonate in which lithium perchlorate is dissolved as an electrolyte, 4 is lithium as a negative electrode active material, and 6
is a negative terminal plate made of nickel sheet.
この負極端子板５の周辺部にはその寸法に応じた枠状の
変性ポリエチレンからなる絶縁部材６が熱溶着されてお
り、この絶縁部材６と正極端子板１を熱溶着することに
より密封している。なお負極端子板６および絶縁材６は
、正極端子板１よりも大きい寸法に設けられ、余剰部と
して一部が外方へはみ出している。そこで第２図のよう
に負極端子板６を絶縁部材６とともに、正極端子板外周
辺部をとり囲むよりに折り曲げ、絶縁部材６と正極端子
板１の外面の周辺部とを熱溶着する。A frame-shaped insulating member 6 made of modified polyethylene corresponding to the dimensions of the negative electrode terminal plate 5 is thermally welded to the periphery of the negative electrode terminal plate 5, and the insulating member 6 and the positive electrode terminal plate 1 are sealed by thermally welding. There is. Note that the negative terminal plate 6 and the insulating material 6 are provided with larger dimensions than the positive terminal plate 1, and a portion thereof protrudes outward as a surplus portion. Therefore, as shown in FIG. 2, the negative terminal plate 6 is bent together with the insulating member 6 so as to surround the outer periphery of the positive terminal plate, and the insulating member 6 and the outer periphery of the positive terminal plate 1 are thermally welded.
これにより絶縁部材６の端子板１，６に対する熱溶着面
積を、これまでよりも増大でき、水分浸入経路を実質的
に長くすることが可能になるとともに端子板６及び絶縁
部材６を折り曲げることによりこれを達成しているだめ
、活物質の配置面積を減少させることもない。As a result, the thermal welding area of the insulating member 6 to the terminal plates 1 and 6 can be increased more than before, making it possible to substantially lengthen the moisture intrusion path, and by bending the terminal plate 6 and the insulating member 6. By achieving this, there is no need to reduce the area in which the active material is arranged.
第３図、第４図は本発明の別な実施例を示すもので、絶
縁部材として小寸法の端子板１の外周辺部に、その寸法
に応じて熱溶着された第１の絶縁部材ｅａと、大寸法の
端子板５の外周辺部にその寸法に応じて熱溶着された第
２の絶縁部材６ｂとの２つを用いたものである。3 and 4 show another embodiment of the present invention, in which a first insulating member ea is thermally welded to the outer periphery of a small-sized terminal board 1 as an insulating member according to its size. and a second insulating member 6b heat-welded to the outer periphery of the large-sized terminal plate 5 according to its size.
扁平形電池を完成させるには、第３図の状態で第１．第
２の絶縁部材ｃｓａ、ｅｂ相互間を熱溶着し、ついで外
方へはみ出した負極端子板６の余剰部を第２の絶縁部材
６ｂの余剰部とともに、正極端子板１の外周辺部をとり
囲むように折り曲げ、第２の絶縁部材ｅｂを端子板１の
外面の周辺部に熱溶着して第４図の状態とする。この構
成の場合も絶縁部材の熱溶着面積が増大するとともに、
第１、第２の絶縁部材６１Ｌ 、６ｂ自体の厚みは、こ
れ１でよりも薄くすることが可能となり、絶縁部材を透
過して電池内に浸入する水分は大幅に抑制され、電池周
辺部の耐透湿性を高めることができる。To complete the flat battery, step 1. in the state shown in Figure 3. The second insulating members csa and eb are thermally welded together, and then the excess portion of the negative electrode terminal plate 6 that protrudes outward is removed along with the excess portion of the second insulating member 6b, and the outer peripheral portion of the positive electrode terminal plate 1 is removed. The second insulating member eb is then thermally welded to the peripheral portion of the outer surface of the terminal plate 1 to form the state shown in FIG. 4. In this configuration as well, the thermal welding area of the insulating member increases, and
The thickness of the first and second insulating members 61L and 6b themselves can be made thinner than in the case of the first insulating member, and moisture penetrating into the battery through the insulating members is greatly suppressed, and the surrounding area of the battery is Moisture resistance can be improved.
次に第２図、第４図に示す本発明の実施例電池ム、Ｂ及
び第６図に示す従来電池Ｃを、いずれも縦１６．５１ｆ
ｆ、横３４．６ｉ ＩＩＩ 、 ５．高０．６ＭＭとし
、周辺部の封止距離（第２図、第４図の６′、第６図の
７′）を２．６１１Ｍとして温度６０℃、相対湿度９０
％の環境に保存したときの内部抵抗の経時変化を第６図
に示す。図から明らかなように従来電池Ｃは保存ととも
に内部抵抗が増加し始め、３０日経過後からは内部抵抗
の増大が著しい。一方電池ムは保存後３０日を経ても内
部抵抗の増大は殆んどなく、６０日、９０日と経過する
につれて内部抵抗は次第に増加するが、９０日保存後で
も内部抵抗は４ｏΩであり、外周封止部の耐透湿性から
良好な保存性能が得られた。さらに電池Ｂは絶縁部材ら
ｂの厚みが電池ＡやＣよりも薄いことが作用してＢより
もさらに良好な保存性能が得られた。Next, the battery according to the embodiment of the present invention shown in FIGS. 2 and 4, and the conventional battery C shown in FIG.
f, width 34.6i III, 5. The height is 0.6MM, the sealing distance at the periphery (6' in Figures 2 and 4, and 7' in Figure 6) is 2.611M, the temperature is 60℃, and the relative humidity is 90℃.
Figure 6 shows the change in internal resistance over time when stored in an environment of 100%. As is clear from the figure, the internal resistance of conventional battery C begins to increase as it is stored, and after 30 days, the internal resistance increases significantly. On the other hand, the internal resistance of the battery hardly increases even after 30 days of storage, and the internal resistance gradually increases as 60 and 90 days pass, but even after 90 days of storage, the internal resistance is 4oΩ. Good storage performance was obtained due to the moisture permeability of the outer peripheral seal. Furthermore, battery B had even better storage performance than battery B due to the fact that the thickness of the insulating member b was thinner than that of batteries A and C.
発明の効果
以上のように本発明では、活物質の配置面積を減少させ
ることなく、電池周辺部における絶縁部材の熱溶着面積
を増大させて、封止部の耐透湿性を高め扁平形電池の保
存性能を良好にできるものである。Effects of the Invention As described above, the present invention increases the thermally welded area of the insulating member in the battery periphery without reducing the arrangement area of the active material, thereby increasing the moisture permeability of the sealing part and improving the flat battery. This allows for good storage performance.
第１図は本発明の一実施例における形成途中の扁平形電
池を示す部分断面図、第２図は完成状態の電池を示す断
面図、第３図は本発明の別な実施例における形成途中の
扁平形電池を示す部分断面図、第４図はその完成状態の
電池を示す断面図。
第５図は従来の扁平形電池の部分断面図、第６図は本発
明における電池の内部抵抗の経時変化を示す図である。
１・・・・・・正極端子板、２・・・・・・正極合剤、
３・・・・・・セパレータ、４・・・・・・リチウム負
極、５・・・・・・負極端子板、ｅ・・・・・・絶縁部
材、６ａ・・・・・・第１の絶縁部材、６ｂ・・・・・
・第２の絶縁部材。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第３図FIG. 1 is a partial sectional view showing a flat battery in the process of being formed according to an embodiment of the present invention, FIG. 2 is a sectional view showing a completed battery, and FIG. FIG. 4 is a partial sectional view showing the flat battery, and FIG. 4 is a sectional view showing the completed battery. FIG. 5 is a partial sectional view of a conventional flat battery, and FIG. 6 is a diagram showing changes over time in the internal resistance of the battery according to the present invention. 1...Positive electrode terminal plate, 2...Positive electrode mixture,
3... Separator, 4... Lithium negative electrode, 5... Negative terminal plate, e... Insulating member, 6a... First Insulating member, 6b...
-Second insulating member. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3
Claims (1)
ート状端子板の外周辺部間に絶縁部材を配置し、この絶
縁部材を熱溶着して前記発電要素を密封した扁平形電池
であって、前記正、負両極のシート状端子板のうち一方
を他方よりも大寸法とし、その余剰外周辺部を絶縁部材
とともに他方のシート状端子板の外周辺部をとり囲むよ
う折り曲げ、この部分の絶縁部材を前記端子板外周辺部
に熱溶着した扁平形電池。 ２）絶縁部材が小寸法のシート状端子板の外周辺部にそ
の寸法に応じて熱溶着された第１の絶縁部材と、大寸法
のシート状端子板の外周辺部にその寸法に応じて熱溶着
された第２の絶縁部材とからなり、この第２の絶縁部材
は大寸法のシート状端子板の外周辺部とともに小寸法の
シート状端子板の外周辺部をとり囲むように折り曲げら
れて熱溶着されている特許請求の範囲第１項記載の扁平
形電池。(1) A flat battery in which an insulating member is arranged between the outer periphery of a sheet-like terminal plate with both positive and negative electrodes covering the surface of a flat power generating element, and the insulating member is heat welded to seal the power generating element. One of the positive and negative sheet-shaped terminal plates is made larger in size than the other, and the excess outer periphery thereof is bent together with an insulating member so as to surround the outer periphery of the other sheet-shaped terminal plate, A flat battery in which this part of the insulating member is thermally welded to the outer periphery of the terminal plate. 2) The first insulating member is thermally welded to the outer periphery of a small-sized sheet-shaped terminal plate according to its size, and the first insulating member is heat-welded to the outer periphery of a large-sized sheet-shaped terminal plate according to its size. and a heat-welded second insulating member, which is bent so as to surround the outer periphery of the large-sized sheet-shaped terminal plate and the outer periphery of the small-sized sheet-shaped terminal plate. The flat battery according to claim 1, which is thermally welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60005171A JPS61163559A (en) | 1985-01-16 | 1985-01-16 | Flat cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60005171A JPS61163559A (en) | 1985-01-16 | 1985-01-16 | Flat cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61163559A true JPS61163559A (en) | 1986-07-24 |
Family
ID=11603786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60005171A Pending JPS61163559A (en) | 1985-01-16 | 1985-01-16 | Flat cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61163559A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0357858U (en) * | 1989-10-06 | 1991-06-04 | ||
| WO1996017390A1 (en) * | 1994-12-01 | 1996-06-06 | Micron Communications, Inc. | Method of forming button-type batteries and a button-type battery insulating and sealing gasket |
| CN103733410A (en) * | 2011-08-02 | 2014-04-16 | 戴姆勒股份公司 | Individual cell for a battery, and a battery |
-
1985
- 1985-01-16 JP JP60005171A patent/JPS61163559A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0357858U (en) * | 1989-10-06 | 1991-06-04 | ||
| WO1996017390A1 (en) * | 1994-12-01 | 1996-06-06 | Micron Communications, Inc. | Method of forming button-type batteries and a button-type battery insulating and sealing gasket |
| US5662718A (en) * | 1994-12-01 | 1997-09-02 | Micron Communications, Inc. | Method of forming thin profile batteries and a thin profile battery insulating and sealing gasket |
| US5843596A (en) * | 1994-12-01 | 1998-12-01 | Micron Communications, Inc. | Methods of forming button type batteries and to button type battery insulating and sealing gaskets |
| US5851244A (en) * | 1994-12-01 | 1998-12-22 | Micron Communications, Inc. | methods of forming thin profile batteries and methods of providing sealing gaskets between battery terminal housing members |
| US5919274A (en) * | 1994-12-01 | 1999-07-06 | Micron Communications, Inc. | Method of forming a thin profile battery |
| US6027829A (en) * | 1994-12-01 | 2000-02-22 | Micron Technology, Inc. | Insulative sealing gaskets and a thin profile battery |
| EP1217669A1 (en) * | 1994-12-01 | 2002-06-26 | Micron Technology, Inc. | Method of formimg button-type batteries and button-type battery insulating and sealing gasket |
| CN103733410A (en) * | 2011-08-02 | 2014-04-16 | 戴姆勒股份公司 | Individual cell for a battery, and a battery |
| EP2740177A1 (en) * | 2011-08-02 | 2014-06-11 | Daimler AG | Individual cell for a battery, and a battery |
| JP2014527262A (en) * | 2011-08-02 | 2014-10-09 | ダイムラー・アクチェンゲゼルシャフト | Single cell and battery for battery |
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