JPS61121259A - Manufacture of flat type battery - Google Patents
Manufacture of flat type batteryInfo
- Publication number
- JPS61121259A JPS61121259A JP59242934A JP24293484A JPS61121259A JP S61121259 A JPS61121259 A JP S61121259A JP 59242934 A JP59242934 A JP 59242934A JP 24293484 A JP24293484 A JP 24293484A JP S61121259 A JPS61121259 A JP S61121259A
- Authority
- JP
- Japan
- Prior art keywords
- sealing material
- sheet
- battery
- terminal blocks
- window frame
- 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
- 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
-
- 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
- H01M50/543—Terminals
- H01M50/564—Terminals characterised by their manufacturing process
- H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
-
- 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
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
- H01M50/557—Plate-shaped terminals
-
- 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
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
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周縁部に窓枠状の熱
可塑性合成樹脂からなるシール材を介在させ、熱溶着に
より密封して形成された電池室内に発電要素を収納して
構成される扁平形電池の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is formed by interposing a window frame-shaped sealing material made of thermoplastic synthetic resin on the peripheral edge of two sheet-shaped terminal plates and sealing them by thermal welding. The present invention relates to a method of manufacturing a flat battery configured by housing a power generation element in a battery chamber.
従来の技術 近年、携帯用電子機器や、電池使用機器は小形。Conventional technology In recent years, portable electronic devices and devices that use batteries have become smaller.
薄形化が急速に進展しているが、それに伴いそれら電子
機器の電源として使用される電池についても小形、薄形
化、更には長期信頼性の要求が増してきている。With the rapid progress in thinning of electronic devices, there is also an increasing demand for batteries used as power sources for these electronic devices to be smaller, thinner, and more reliable over a long period of time.
従来、リチウムに代表される軽金属を負極活物質とした
この種の扁平形電池は、高温、多湿での保存日数が経過
するに従い、外気の水分が電池内部へ浸入し、リチウム
と水分が反応して水素ガスを発生し、電池が膨張し電池
寿命を短かくする欠点があった。Conventionally, this type of flat battery uses a light metal such as lithium as the negative electrode active material. As the number of days of storage in high temperature and high humidity passes, moisture from the outside air enters the battery and the lithium and moisture react. This has the drawback of generating hydrogen gas, causing the battery to expand and shortening its life.
上記欠点を解消するために、これまで集電体を兼ねた２
枚のシート状端子板と窓枠状シール材とを熱溶着して密
封する構造をとっており、電池を完全密封する目的で、
シール材の材料検討、熱溶着の温贋条件等の、種々の試
みがなされたが前記の欠点を解消するには至らなかった
。In order to eliminate the above drawbacks, two
It has a structure in which a sheet-shaped terminal board and a window frame-shaped sealing material are heat-welded and sealed, and the purpose is to completely seal the battery.
Various attempts have been made, such as examining the material of the sealing material and changing the temperature conditions for thermal welding, but the above-mentioned drawbacks have not been solved.
発明が解決しようとする問題点
前述の方法では、２枚のシート状端子板と窓枠状のシー
ル材とを加熱によシ熱溶着しているが、溶融したシール
材が冷えて固まるまでに１シート端子板を変形させて溶
着部の厚みが不均一になり、シート端子板とシール材と
の接着強度にばらつきが発生していた。従って高温多湿
保存中に前記部材間に生じた間隙部を通して外部の水分
が電池内部へ侵入し、結果的に内部抵抗が増加するとい
う問題点があった。Problems to be Solved by the Invention In the method described above, two sheet-shaped terminal plates and a window frame-shaped sealing material are thermally welded together by heating, but it is difficult to weld the two sheets of terminal plates and the window frame-shaped sealing material by the time the molten sealing material cools and hardens. The thickness of the welded portion became uneven due to the deformation of the one-sheet terminal board, and variations occurred in the adhesive strength between the sheet terminal board and the sealing material. Therefore, there is a problem in that external moisture enters the inside of the battery through the gaps formed between the members during storage at high temperature and high humidity, resulting in an increase in internal resistance.
本発明はこのような問題点を解決するもので、 。The present invention solves these problems.
電池内部へ侵入してくる外気の水分を抑制し、だ頼性の
高い扁平形電池を提供することを目的とするものである
。The purpose of this invention is to provide a highly reliable flat battery that suppresses moisture in the outside air from entering the inside of the battery.
問題点を解決するための手段 ゛
上記問題点を解決するために本発明は、２枚のシート状
端子板と窓枠状シール材とを加熱溶着し、この部分を加
圧しながら冷却するものである。Means for Solving the Problems ゛In order to solve the above problems, the present invention heat-welds two sheet-shaped terminal plates and a window frame-shaped sealing material, and cools this part while applying pressure. be.
作用
この製造方法により、溶融したシール材が固まるまでシ
ート状端子板とシール材と・の溶着部を加圧しながら冷
却するので、前記ノート状端子板の変形を防止し、溶着
部の厚みが均一で、かつシート状端子板とシール材との
接着力が強く、従来例で述べたような両部材間に間隙部
が形成されることはない。従って電池内部へ侵入してく
る外気の水分を良好に抑制し、高温多湿保存中において
も中部抵抗が増加するということもなくなる。Function: With this manufacturing method, the welded area between the sheet-shaped terminal plate and the sealing material is cooled while applying pressure until the molten sealing material hardens, thereby preventing deformation of the note-shaped terminal plate and ensuring a uniform thickness of the welded area. In addition, the adhesive strength between the sheet-like terminal plate and the sealing material is strong, and no gap is formed between the two members as described in the conventional example. Therefore, the moisture in the outside air that enters the inside of the battery is effectively suppressed, and the resistance in the middle part does not increase even during storage at high temperature and high humidity.
実施例
以下、本発明の実施例を第１図から第３図を参照して説
明する。Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3.
第１図は本発明により得た扁平形電池の部分断面図であ
る。図において、１は負極集電体を兼ねるニッケルのシ
ート状端子板、２は１に圧着された負極リチウム、３は
正極集電体を兼ねるステンレススチールよりなるシート
状端子板、４は二酸化マンガンと炭素粉末とバインダー
とからなる正極合剤、５は電解液を含んだポリプロピレ
ン製不織布からなるセパレータ、６は窓枠状に加工した
熱可塑性の変性ポリエチレンよりなるシール材である。FIG. 1 is a partial sectional view of a flat battery obtained according to the present invention. In the figure, 1 is a nickel sheet terminal plate that also serves as a negative electrode current collector, 2 is a negative electrode lithium crimped to 1, 3 is a stainless steel sheet terminal plate that also serves as a positive electrode current collector, and 4 is a manganese dioxide terminal plate. A positive electrode mixture made of carbon powder and a binder, 5 a separator made of a polypropylene nonwoven fabric containing an electrolytic solution, and 6 a sealing material made of thermoplastic modified polyethylene processed into a window frame shape.
この電池の構成方法は、正極端子を兼ねるシート状端子
板３の上に正極合剤４と電解液を含んだセパレータ６を
順次載置し、前記シート状端子板３の周縁部に窓枠状に
加工したシール材６をのせ、次に負極２が圧着された負
極集電体を兼ねるシート状端子板１をのせて、シール材
６を一方の端子板の周縁部側から１８０°Ｃ，５秒間加
熱し、ｔｓＫｖｃｒｄの圧力をかけてシール材６と負極
端子板１及び正極端子板３とを熱溶着した後、速やかに
溶着部を加圧冷却する。第２図に加圧冷却の工程の略図
を示す。７は黄銅などからなる加圧金型で溶着部８を常
温にて３０秒間、約５に？ ／ ｃｎｌの圧力で加圧し
ながら冷却する。The method of constructing this battery is to sequentially place a separator 6 containing a positive electrode mixture 4 and an electrolyte on a sheet-like terminal plate 3 which also serves as a positive electrode terminal, and to form a window frame shape around the periphery of the sheet-like terminal plate 3. A sheet-shaped terminal plate 1 which also serves as a negative electrode current collector is placed on which the negative electrode 2 is crimped, and the sealing material 6 is heated at 180°C and 5°C from the peripheral edge side of one terminal plate. After heating for seconds and applying a pressure of tsKvcrd to thermally weld the sealing material 6 to the negative terminal plate 1 and the positive terminal plate 3, the welded portion is immediately cooled under pressure. FIG. 2 shows a schematic diagram of the pressurized cooling process. 7 is a pressure mold made of brass or the like and presses the welded part 8 at room temperature for 30 seconds to about 5? Cool while pressurizing at a pressure of / cnl.
上記本発明の電池Ａと、従来の無加圧で冷却した電池Ｂ
との各５０個について、６０°Ｃ９０％の高温多湿保存
時の保存日数と内部抵抗との関係の推移を第３図に示す
。The above battery A of the present invention and the conventional battery B cooled without pressurization
Figure 3 shows the relationship between the number of storage days and internal resistance when stored at 60° C. and 90% high temperature and humidity for 50 pieces of each.
発明の効果
以上の説明から明らかなように、２枚のソート状端子板
と、窓枠状シール材とを加熱溶着した後に、その溶着部
を加圧冷却することにより、冷却時のシート状端子板の
変形を防止し、溶着部の厚みが均一で、かつシート状端
子板とシール材との接着力が強く、保存性能が良好で信
頼性の高い扁平形電池を得ることができる。Effects of the Invention As is clear from the above explanation, by heating and welding two sort-shaped terminal plates and a window frame-shaped sealing material, and then cooling the welded part under pressure, the sheet-shaped terminal when cooled is It is possible to obtain a flat battery that prevents deformation of the plate, has a uniform thickness at the welded part, has strong adhesive force between the sheet-like terminal plate and the sealing material, has good storage performance, and is highly reliable.
第１図は本発明の実施例により得た扁平形電池の部分断
面図、第２図は溶着部の加圧冷却の工程を示す略図、第
３図は６０°Ｃ９０％保存時の保存日数と内部抵抗との
関係の推移を示す図である。
１・・・・・負極シート状端子板、２・・・・・負極、
３・・・正極シート状端子板、４・・−・・−正極合剤
、５・・・・・セパレータ、６・・・・・・シール材、
７・・・・−加圧金型、８−・・・溶着部。Fig. 1 is a partial cross-sectional view of a flat battery obtained according to an example of the present invention, Fig. 2 is a schematic diagram showing the process of pressurized cooling of the welded part, and Fig. 3 is a diagram showing the number of days of storage when stored at 60°C at 90%. FIG. 3 is a diagram showing the transition of the relationship with internal resistance. 1... Negative electrode sheet terminal plate, 2... Negative electrode,
3...Positive electrode sheet terminal plate, 4...-Positive electrode mixture, 5...Separator, 6...Sealing material,
7...-pressure mold, 8-... welded part.
Claims (1)
に、セパレータを介して対向するように正極、負極を配
置し、かつシート状端子板の周縁部間に窓枠状の熱可塑
性合成樹脂からなるシール材を介在させ、２枚の端子板
とリール材とを熱溶着して前記発電要素を電池室内に密
封する電池の製造方法であって、前記シート状端子板の
周縁部と前記シール材とを加熱溶着し、その部分を加圧
しながら冷却することを特徴とする扁平形電池の製造方
法。The positive and negative electrodes are placed between two sheet-shaped terminal plates that also serve as current collectors, with a separator interposed between them, and a window frame-shaped thermoplastic composite is placed between the peripheral edges of the sheet-shaped terminal plates. A method for manufacturing a battery, in which the power generating element is sealed in a battery chamber by thermally welding two terminal plates and a reel material with a sealing material made of resin interposed therebetween, the method comprising: A method for manufacturing a flat battery, characterized by heating and welding a sealing material and cooling that part while applying pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59242934A JPS61121259A (en) | 1984-11-16 | 1984-11-16 | Manufacture of flat type battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59242934A JPS61121259A (en) | 1984-11-16 | 1984-11-16 | Manufacture of flat type battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61121259A true JPS61121259A (en) | 1986-06-09 |
Family
ID=17096388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59242934A Pending JPS61121259A (en) | 1984-11-16 | 1984-11-16 | Manufacture of flat type battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61121259A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02213046A (en) * | 1989-02-14 | 1990-08-24 | Fuji Elelctrochem Co Ltd | Manufacture of lithium paper battery |
-
1984
- 1984-11-16 JP JP59242934A patent/JPS61121259A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02213046A (en) * | 1989-02-14 | 1990-08-24 | Fuji Elelctrochem Co Ltd | Manufacture of lithium paper battery |
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