JPS6039760A - Production method of lithium cell - Google Patents
Production method of lithium cellInfo
- Publication number
- JPS6039760A JPS6039760A JP58148346A JP14834683A JPS6039760A JP S6039760 A JPS6039760 A JP S6039760A JP 58148346 A JP58148346 A JP 58148346A JP 14834683 A JP14834683 A JP 14834683A JP S6039760 A JPS6039760 A JP S6039760A
- Authority
- JP
- Japan
- Prior art keywords
- sealant
- battery
- case
- batteries
- production method
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ガスケットと相対する金属ケースの立上り部
内周面に封止剤を塗布するリチウム電池の製造法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing a lithium battery in which a sealant is applied to the inner peripheral surface of a rising portion of a metal case facing a gasket.
従来例の構成とその問題点
従来の代表的な扁平形リチウム電池の断面図を第１図に
示す。図中１は正極端子を兼ねた金属ケース、２は負極
端子を兼ねた封口板で内面には負極活物質のリチウム３
が圧着されている。４はポリプロピレンなどからなるガ
スケット、６は二酸化マンガンフッ化炭素などを活物質
とした正極、６は非水電解液を含浸したポリプロピレン
力どからなるセパレータであり、金属ケース１の開口端
を内方へかしめ、ガスケット４を介して封目板２０周縁
を締めつけることで封口している。Structure of a conventional example and its problems A sectional view of a typical conventional flat lithium battery is shown in FIG. In the figure, 1 is a metal case that also serves as a positive electrode terminal, and 2 is a sealing plate that also serves as a negative electrode terminal.
is crimped. 4 is a gasket made of polypropylene, 6 is a positive electrode made of manganese fluorocarbon dioxide as an active material, and 6 is a separator made of polypropylene impregnated with a non-aqueous electrolyte. The seal is sealed by crimping and tightening the peripheral edge of the sealing plate 20 via the gasket 4.
従来、リチウム電池は耐漏液性能の向上を目的として種
々の検討を重ねてきたが、その一つとして金属ケース１
のガスケット４と相対する面、すなわちケースの立上り
部内周面にピッチ、又は高分子シール剤などの封止剤７
を塗布することにより、大巾な改善がなされた。しかし
その反面、加圧封口による電池内圧の上昇、又は高温保
存中での電池の内部圧力の増加により、ケース開口先端
部の封止剤が電池外部へ流出し、Ｌ池が汚染されたり、
電子機器に組み込まれた場合に端子との接触不良が発生
するという欠点があった。In the past, various studies have been conducted to improve the leakage resistance of lithium batteries, one of which is the metal case1.
A sealant 7 such as a pitch or a polymer sealant is applied to the surface facing the gasket 4, that is, the inner peripheral surface of the rising part of the case.
Significant improvements were made by applying . However, on the other hand, due to an increase in the internal pressure of the battery due to the pressurized seal, or an increase in the internal pressure of the battery during high-temperature storage, the sealant at the tip of the case opening may leak out of the battery, contaminating the L pond.
When incorporated into electronic equipment, there is a drawback in that poor contact with terminals occurs.
発明の目的
本発明は上記のような従来の欠点を解消して電池内圧の
上昇による封止剤の電池外部への流出を防ぎ、封止剤に
よる電池の汚染を防止することを目的としたものである
。Purpose of the Invention The present invention aims to eliminate the above-mentioned conventional drawbacks, prevent the sealant from flowing out of the battery due to an increase in internal pressure of the battery, and prevent contamination of the battery by the sealant. It is.
発明の構成
すなわち、本発明は前記目的を達成するために、ケース
立上シ部内周面に塗布する封止剤をケース開口先端部よ
り、ケース高さに対して２０〜４０チの長さ分だけ下げ
た位置から下側に塗布することを特徴とするものである
。このような構成であれば、封止剤の電池外部への漏出
を良好に防止できる〇
実施例の説明
第２図は、本発明の実施例によるケースへの封止剤の塗
布状態、第３図は従来の封止剤塗布状態を示す断面図で
ある。Structure of the Invention In other words, in order to achieve the above-mentioned object, the present invention applies a sealant to be applied to the inner circumferential surface of the case upright part from the case opening tip for a length of 20 to 40 inches relative to the case height. It is characterized by applying from the lower position. With such a configuration, leakage of the sealant to the outside of the battery can be effectively prevented. 〇Explanation of the Embodiment Figure 2 shows the application state of the sealant to the case according to the embodiment of the present invention, and the third The figure is a sectional view showing a state in which a conventional sealant is applied.
これまでは封止剤がケース開口先端部まで塗布されてい
るので耐漏液性能は良好であるが、その反面、電池の内
部圧力の増加によりケース先端部の封止剤が押されて電
池外部へ流出し、封止剤による電池の汚染が発生してい
た。Up to now, the sealant has been applied to the tip of the case opening, so leakage resistance has been good, but on the other hand, as the internal pressure of the battery increases, the sealant at the tip of the case is pushed and leaks to the outside of the battery. The leakage caused contamination of batteries due to the sealant.
本発明では、耐漏液性能は従来と同程度を確保し、かつ
ケース開口先端部内側には封止剤を存在させないので、
電池の内部圧力の増加による封止剤の電池外部への流出
を防止して封止剤による電池の汚れなどの欠点を解消し
、品質の安定した電池が確保できる。In the present invention, the leakage resistance performance is maintained at the same level as the conventional one, and no sealant is present inside the case opening tip.
This prevents the sealant from flowing out of the battery due to an increase in the internal pressure of the battery, eliminates defects such as contamination of the battery due to the sealant, and ensures a battery with stable quality.
本発明の効果を確認するためにケース立上り部内周面に
塗布する封止剤の塗布位置について種々の検削を行なち
た結果を以下に示す。In order to confirm the effects of the present invention, various inspections were conducted regarding the application position of the sealant applied to the inner peripheral surface of the rising portion of the case, and the results are shown below.
金属ケースの高さば１・５ ｍｍ、ケース立上り部内周
面に塗布する封止剤は不乾性鉱物油を混合したピッチを
用い、その塗布位置はケース開口先端部よりＯｍ＋ｎ、
０．３ｍｍ、 ０．６ｍｍ、０．９ｍｍ下げた位置よ
り下側にした。これは、封止剤の塗布上端位置がケース
高さに対して０％、２０％、４０％。The height of the metal case is 1.5 mm. The sealant applied to the inner peripheral surface of the rising part of the case is a pitch mixed with non-drying mineral oil, and the application position is Om+n from the tip of the case opening.
It was lowered by 0.3 mm, 0.6 mm, and 0.9 mm. This means that the top position of the sealant applied is 0%, 20%, and 40% of the case height.
ｅｏ％の位置にあたる。これらの封止剤を塗布し７たケ
ースを用いて封口した電池Ａ、Ｂ、Ｇ、Ｉ）［ついて耐
漏液性能、及び封止剤による電池の汚染を比較した結果
を次表に示した。いずれも電池外径は２０ｍｍ、電池総
高ば１・６ｍｍである０尚、試験項目については、
（１）温度６０℃で１００日間放置儀の漏液個数、及び
封止剤流出による汚染電池の個数。It corresponds to the position of eo%. Batteries A, B, G, and I) sealed using cases coated with these sealants are shown in the following table for the results of comparing the leakage resistance and contamination of the batteries by the sealants. In both cases, the outer diameter of the battery is 20 mm, and the total height of the battery is 1.6 mm.The test items are (1) Number of leaking batteries when left at a temperature of 60°C for 100 days, and number of contaminated batteries due to leakage of sealant. Number of pieces.
（２）高温（６０℃）−低温（−１０°Ｃ）サイクル試
験（Ｍ Ｉ Ｌ Ｓ Ｔ Ｄ ２０２ Ｄ −１０８Ｇ
）３０日間実施後の漏液電池の個数、及び封止剤流出
による汚染電池の個数
を示した。電池の試験数は各１００個である。(2) High temperature (60°C)-low temperature (-10°C) cycle test (MILST D 202 D-108G
) The number of batteries leaking after 30 days and the number of batteries contaminated due to leakage of sealant are shown. The number of batteries tested was 100 each.
発明の効果
上記の結果より明らかなように、本発明は、ケース立上
シ内周面に塗布する封止剤をケース開口先端部よシ、ケ
ース高さに対して２０〜４０係の長さ分だけ下Ｉけ゛た
位置から下側に塗布することにより、耐漏液性能、並び
に封止剤の電池外部への流出防止に大きな効果がある。Effects of the Invention As is clear from the above results, the present invention has the advantage of applying a sealant applied to the inner peripheral surface of the case upright to a length of 20 to 40 mm relative to the case height, from the case opening tip to the case opening end. By applying the sealant from a position that is far below the battery, it is highly effective in improving leakage resistance and preventing the sealant from leaking out of the battery.
第１図は代表的な扁平形リチウム電池の断面図、第２図
は本発明の実施例におけるケースの封止剤塗布状態を宗
す断面図、第３図は従来の封止剤の塗布状態を示す断面
図である。
１・・・・・・金属ケース、２・・・・・封口板、３・
・・・・・負極、４・・・・・・ガスケツ！・、了・・
・・・封止剤。Fig. 1 is a cross-sectional view of a typical flat lithium battery, Fig. 2 is a cross-sectional view showing the state in which the sealant is applied to the case in the embodiment of the present invention, and Fig. 3 is the state in which the conventional sealant is applied. FIG. 1... Metal case, 2... Sealing plate, 3...
...Negative electrode, 4...Gasket!・、Complete...
...Sealant.
Claims (1)
を塗布する工程を備え、ケース開口先端部よりケース高
さに対して２０〜４０チの長さ分だけ下げた位置から下
側に封止剤を塗布することを特徴とするリチウム電池の
製造法０The sealant is applied to the inner peripheral surface of the rising part of the metal case, which also serves as the positive terminal. Lithium battery manufacturing method 0 characterized by applying a blocking agent
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58148346A JPS6039760A (en) | 1983-08-12 | 1983-08-12 | Production method of lithium cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58148346A JPS6039760A (en) | 1983-08-12 | 1983-08-12 | Production method of lithium cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6039760A true JPS6039760A (en) | 1985-03-01 |
Family
ID=15450704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58148346A Pending JPS6039760A (en) | 1983-08-12 | 1983-08-12 | Production method of lithium cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6039760A (en) |
-
1983
- 1983-08-12 JP JP58148346A patent/JPS6039760A/en active Pending
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