JPH06333542A - Cylindrical battery - Google Patents
Cylindrical batteryInfo
- Publication number
- JPH06333542A JPH06333542A JP5116923A JP11692393A JPH06333542A JP H06333542 A JPH06333542 A JP H06333542A JP 5116923 A JP5116923 A JP 5116923A JP 11692393 A JP11692393 A JP 11692393A JP H06333542 A JPH06333542 A JP H06333542A
- Authority
- JP
- Japan
- Prior art keywords
- positive electrode
- case
- electrode case
- side wall
- mixture
- 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.)
- Granted
Links
Classifications
-
- 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
- Sealing Battery Cases Or Jackets (AREA)
Abstract
(57)【要約】
【目的】正極ケ−スの側壁部と底部にかかる周縁部の強
度を増すことにより、複数個のアルカリ乾電池を使用す
る機器において、過放電状態になった際に発生する正極
ケ−スのクラッキングを防止し、耐漏液性に優れた円筒
型電池を提供することを目的とする。
【構成】正極ケ−スの側壁部と底部にかかる周縁部のケ
−ス厚を厚肉化することにより、正極合剤の中央部にコ
アロッドを挿入した状態で正極合剤を加圧して正極ケ−
スの内壁に合剤を圧入嵌合させる際の正極ケ−スの側壁
部と底部にかかる周縁部に発生する応力を分散すること
ができ、機械的強度も向上し、正極ケ−スのクラッキン
グを防止できる。
(57) [Abstract] [Purpose] It occurs when the battery is over-discharged in a device using a plurality of alkaline batteries by increasing the strength of the peripheral part of the side wall and bottom of the positive electrode case. It is an object of the present invention to provide a cylindrical battery that prevents cracking of the positive electrode case and has excellent liquid leakage resistance. [Structure] By increasing the thickness of the case at the peripheral portion of the positive electrode case, which is the side wall portion and the bottom portion, the positive electrode mixture is pressed while the core rod is inserted in the central portion of the positive electrode mixture. Case
It is possible to disperse the stress generated in the side wall part and the peripheral part of the bottom part of the positive electrode case when the mixture is press-fitted to the inner wall of the positive electrode case, the mechanical strength is improved, and the positive electrode case is cracked. Can be prevented.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電池ケ−スの改良に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved battery case.
【０００２】[0002]
【従来の技術】従来の電池ケ−ス、例えばアルカリ乾電
池の正極ケ−ス等は、一般に圧延鋼板に深絞り加工を施
して円筒形の形状に加工されている。図３で、従来のア
ルカリ乾電池について説明する。深絞り加工により形成
され、側壁部と底部とが同じ厚み（０．２５ｍｍ程度）
に形成された正極ケ−ス１内に、円筒形に成型された二
酸化マンガンと黒鉛からなる正極合剤２を複数個積み重
ね、それら正極合剤２の中空部にコアロッドを挿入し、
上方から正極合剤２を正極ケ−ス１の内壁に圧着させ
る。正極と負極を分けるセパレ−タ３を正極合剤２の中
空部に挿入し、その内側にか性カリ、粘性物質及び亜鉛
粉末からなる負極ゲル状物質４を注入し、弾性を有する
ガスケット封口体５、の中央部に負極集電体６、負極端
子底板７を一体化した部品を圧入した組立ガスケット封
口体を、正極ケ−ス１上に乗せ、正極ケ−ス１の開口部
が組立ガスケット封口体の嵌合部に強く密着するように
して封口され、電池外周部に外装ラベル８を巻く方法が
採られている。（例えば特開平３−４０３７１号公報）2. Description of the Related Art Conventional battery cases, for example, positive electrode cases for alkaline dry batteries, are generally formed into a cylindrical shape by subjecting a rolled steel plate to deep drawing. A conventional alkaline dry battery will be described with reference to FIG. Formed by deep drawing, the side wall and bottom have the same thickness (about 0.25 mm)
In the positive electrode case 1 formed in the above, a plurality of positive electrode mixture 2 made of cylindrical manganese dioxide and graphite are stacked, and a core rod is inserted into the hollow portion of the positive electrode mixture 2.
The positive electrode mixture 2 is pressed against the inner wall of the positive electrode case 1 from above. A separator 3 for separating the positive electrode and the negative electrode is inserted into the hollow portion of the positive electrode mixture 2, and the negative electrode gel-like substance 4 composed of caustic potash, a viscous substance and zinc powder is injected into the inside thereof to provide an elastic gasket sealing body. 5, the assembly gasket sealing body in which a component in which the negative electrode current collector 6 and the negative electrode terminal bottom plate 7 are integrated is press-fitted in the center of 5, is placed on the positive electrode case 1, and the opening of the positive electrode case 1 is assembled gasket. A method is adopted in which the outer label is wound so as to strongly adhere to the fitting portion of the sealing body, and the outer label 8 is wrapped around the battery outer peripheral portion. (For example, JP-A-3-40371)
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、図２
（ａ），（ｂ）に示す従来の構造の正極ケ−スにおい
て、正極合剤２の中央部にコアロッドを挿入した状態で
正極合剤２を加圧して、正極ケ−ス１に圧着させる際
に、正極ケ−スの側壁部と底部にかかる周縁部に応力が
残留し、機械的強度が低下している。そのため複数個の
アルカリ乾電池を使用する機器において、その中に放電
済みのアルカリ乾電池が混入した際、放電済みアルカリ
乾電池が過放電状態となり、ガス発生を起こし、また、
正極合剤の膨脹により機械強度の弱い側壁部と底部にか
かる周縁部にクラッキングを発生し、漏液が発生すると
いう欠点があった。However, as shown in FIG.
In the positive electrode case of the conventional structure shown in (a) and (b), the positive electrode mixture 2 is pressurized and pressure-bonded to the positive electrode case 1 with the core rod inserted in the central portion of the positive electrode mixture 2. At this time, stress remains on the side wall and the peripheral edge of the bottom of the positive electrode case, and the mechanical strength is reduced. Therefore, in a device that uses multiple alkaline dry batteries, when the discharged alkaline dry batteries are mixed into the device, the discharged alkaline dry batteries become over-discharged, causing gas generation, and
Due to the expansion of the positive electrode mixture, there has been a drawback that cracking occurs in the side wall portion and the peripheral edge portion of the bottom portion where mechanical strength is weak and liquid leakage occurs.
【０００４】本発明は、前記のような従来の問題点を解
決し、正極ケ−ス側壁部と底部にかかる周縁部のクラッ
キングを防止し、耐漏液性に優れたアルカリ乾電池を提
供することを目的とする。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art and provides an alkaline dry battery which is excellent in leakage resistance by preventing cracking of the peripheral portion of the side wall and bottom of the positive electrode case. To aim.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、有底筒状の金属ケ−ス内にあらかじめ筒
状に加圧成型した成型合剤を圧入嵌合した筒形電池にお
いて、前記ケ−スの側壁部と底部にかかる周縁部の厚さ
が少なくともケ−ス側壁部より厚く形成したことを特徴
とする。In order to achieve the above-mentioned object, the present invention has a cylindrical shape in which a molding mixture preliminarily cylindrically pressure-molded in a bottomed cylindrical metal case is press-fitted. The battery is characterized in that the side wall portion of the case and the peripheral edge portion of the bottom portion are formed to be thicker than at least the side wall portion of the case.
【０００６】[0006]
【作用】この構造により、正極缶内で成型された正極合
剤の中空部にコアロッドを挿入し、上方から加圧される
際の応力を分散することができ、しかも肉厚が厚いた
め、機械的強度が強まり、クラッキングを防止すること
ができる。With this structure, the core rod can be inserted into the hollow portion of the positive electrode mixture molded in the positive electrode can to disperse the stress when it is pressed from above, and since the wall thickness is large, The target strength is increased and cracking can be prevented.
【０００７】[0007]
【実施例】以下、本発明の一例を、図１（ａ），（ｂ）
を用いて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An example of the present invention will be described below with reference to FIGS.
Will be explained.
【０００８】図１（ａ）は本発明の一実施例を示す正極
ケ−スの半断面図であり、図１（ｂ）は本発明の一実施
例を示す正極端子部の拡大図である。正極ケ−ス１は圧
延鋼板に深絞り加工を施して円筒形の形状に加工したも
ので、正極ケ−ス側壁部と底部にかかる周縁部の肉厚を
従来の０．２５ｍｍから０．３０ｍｍへと厚く形成され
ている。（正極ケ−ス側壁部と底部が同一厚０．２５ｍ
ｍ）FIG. 1A is a half sectional view of a positive electrode case showing an embodiment of the present invention, and FIG. 1B is an enlarged view of a positive electrode terminal portion showing an embodiment of the present invention. . The positive electrode case 1 is formed by deep drawing a rolled steel plate into a cylindrical shape, and has a wall thickness of the peripheral portion of the positive electrode case side wall and the bottom of the conventional case of 0.25 mm to 0.30 mm. It is formed thickly. (The thickness of the positive electrode case side wall and bottom is the same 0.25 m.
m)
【０００９】このような正極ケ−スに、正極合剤２の中
央部にコアロッドを挿入した状態で正極合剤２を加圧し
て、正極ケ−ス１に圧着させ、セパレ−タ３を正極合剤
２の中空部に挿入し、その内側に電解液及び、か性カ
リ，粘性物質及び亜鉛粉末からなる負極ゲル状物質４を
注入し、弾性を有するガスケット封口体５の中央部に負
極集電体６、負極端子底板７を一体化した部品を圧入し
た組立ガスケット封口体を正極ケ−ス１上に乗せ、正極
ケ−ス１の開口部が組立ガスケット封口体の嵌合部に強
く密着するようにして封口し、電池外周部に外装ラベル
８を巻いた。In such a positive electrode case, the positive electrode mixture 2 is pressurized with the core rod inserted in the central portion of the positive electrode mixture 2 and pressure-bonded to the positive electrode case 1 to set the separator 3 to the positive electrode. The mixture is inserted into the hollow portion of the mixture 2, and the inside of the mixture is filled with the electrolytic solution and the negative electrode gel-like substance 4 composed of caustic potash, viscous substance and zinc powder, and the negative electrode collector is placed in the center of the elastic gasket sealing body 5. The assembled gasket sealing body in which the parts in which the electric body 6 and the negative electrode terminal bottom plate 7 are integrated is press-fitted is placed on the positive electrode case 1, and the opening of the positive electrode case 1 is firmly adhered to the fitting portion of the assembled gasket sealing body The outer label 8 was wrapped around the outer periphery of the battery.
【００１０】以上のように構成した電池と、比較品とし
て、従来の正極ケ−ス（正極ケ−ス側壁部と底部にかか
る周縁部の肉厚が０．２５ｍｍ）を用い、それ以外は同
一の条件でアルカリ乾電池ＬＲ６を試作した。The battery constructed as described above and a conventional positive electrode case (having a peripheral wall thickness of 0.25 mm on the side wall and the bottom of the positive electrode case of 0.25 mm) as a comparative product were used. The alkaline dry battery LR6 was manufactured as a prototype under the conditions.
【００１１】本発明による実施例と比較例について、Ｌ
Ｒ６を４個直列接続した回路において、その中の１個の
電池をあらかじめ１０Ωで２０００分間連続で放電させ
ておき、その回路に１２５Ωの抵抗を接続し放電を行
い、正極ケ−スのクラッキングによるアルカリ電解液の
漏液電池数を調べた（試験セット数：各１００セッ
ト）。本発明品は、１週間連続放電させても１００セッ
ト中一つも正極ケ−スのクラッキングによるアルカリ電
解液の漏液はなく、それに対して従来品の正極ケ−スを
用いたアルカリ乾電池は、１００セット中８個に正極ケ
−スにクラッキングが生じ、アルカリ電解液の漏液に至
った。Regarding the examples and comparative examples according to the present invention, L
In a circuit in which four R6 are connected in series, one of the batteries is previously discharged at 10 Ω for 2000 minutes continuously, and a 125 Ω resistor is connected to the circuit to perform discharge, which is caused by cracking of the positive electrode case. The number of leaking batteries of the alkaline electrolyte was examined (the number of test sets: 100 sets each). The product of the present invention did not leak the alkaline electrolyte due to cracking of the positive electrode case out of 100 sets even after continuously discharged for one week, whereas the alkaline dry battery using the conventional positive electrode case, Cracking occurred in the positive electrode case in 8 out of 100 sets, resulting in leakage of the alkaline electrolyte.
【００１２】なお本実施例では、正極ケ−スの側壁部と
底部にかかる周縁部のケ−ス厚を厚くする形状として、
前記周縁部のア−ルより内側のア−ルを大きくした図１
の（ｂ）に示す形状を用いたが、他の方法として内側を
テ−パ−状にした図１の（ｃ）のような形状等にするこ
とによっても得られる。しかし、正極ケ−ス全体の肉厚
を厚くしたのでは、電池内容積の低下となり電池寿命の
低下となるため得策ではない。In the present embodiment, the shape of the case in which the thickness of the side wall portion and the bottom portion of the positive electrode case around the bottom is increased is as follows.
FIG. 1 in which the inside of the peripheral part is larger than that of the peripheral part.
Although the shape shown in (b) of FIG. 1 is used, it can be obtained by another method such as a shape as shown in (c) of FIG. However, increasing the thickness of the entire positive electrode case is not a good idea because it reduces the battery internal volume and battery life.
【００１３】[0013]
【発明の効果】以上のように本発明の正極ケ−スの側壁
部と底部にかかる周縁部を厚肉化したことにより、複数
個の電池を使用する機器において、過放電状態になった
際も、正極ケ−スの側壁部と底部にかかる周縁部のクラ
ッキングは発生せず、耐漏液性の優れた信頼性の高い筒
形電池を提供することができる。As described above, by thickening the peripheral portions of the side wall and the bottom of the positive electrode case of the present invention, when an equipment using a plurality of batteries is in an over-discharged state. However, the cracking of the peripheral portion of the side wall and the bottom of the positive electrode case does not occur, and a highly reliable tubular battery having excellent liquid leakage resistance can be provided.
【図１】（ａ） 本発明の−実施例の正極ケ−スの半断
面図 （ｂ） 本発明の一実施例の正極端子部の拡大図 （ｃ） 本発明の他実施例の正極端子部の拡大図FIG. 1A is a half sectional view of a positive electrode case of an embodiment of the present invention. FIG. 1B is an enlarged view of a positive electrode terminal portion of an embodiment of the present invention. FIG. 1C is a positive electrode terminal of another embodiment of the present invention. Enlarged view of part
【図２】（ａ） 従来の正極ケ−スの半断面図 （ｂ） 従来の正極端子部の拡大図2A is a half sectional view of a conventional positive electrode case, FIG. 2B is an enlarged view of a conventional positive electrode terminal portion.
【図３】アルカリ乾電池の半断面図[Figure 3] Half-sectional view of an alkaline battery
１ 正極ケ−ス ２ 正極合剤 ３ セパレ−タ ４ 負極ゲル状物質 ５ ガスケット封口体 ６ 負極集電体 ７ 負極端子底板 ８ 外装ラベル DESCRIPTION OF SYMBOLS 1 Positive electrode case 2 Positive electrode mixture 3 Separator 4 Negative gel-like substance 5 Gasket sealing body 6 Negative electrode current collector 7 Negative electrode terminal bottom plate 8 Exterior label
フロントページの続き (72)発明者 久保 勲 大阪府門真市大字門真1006番地 松下電器 産業株式会社内Front page continuation (72) Inventor Isao Kubo 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.
Claims (1)
状に加圧成型した成型合剤を圧入嵌合した筒形電池にお
いて、前記ケ−スの側壁部と底部にかかる周縁部の厚さ
が、少なくともケ−ス側壁部より厚く形成したことを特
徴とする筒形電池。1. A cylindrical battery in which a molding mixture preliminarily cylindrically pressure-molded in a bottomed cylindrical metal case is press-fitted into the case, and a peripheral portion of a side wall and a bottom of the case is provided. Is formed thicker than at least the side wall of the case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05116923A JP3099583B2 (en) | 1993-05-19 | 1993-05-19 | Cylindrical battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05116923A JP3099583B2 (en) | 1993-05-19 | 1993-05-19 | Cylindrical battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06333542A true JPH06333542A (en) | 1994-12-02 |
| JP3099583B2 JP3099583B2 (en) | 2000-10-16 |
Family
ID=14699026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05116923A Expired - Lifetime JP3099583B2 (en) | 1993-05-19 | 1993-05-19 | Cylindrical battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3099583B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8187738B2 (en) | 2000-10-26 | 2012-05-29 | Isao Matsumoto | Spirally-rolled electrodes with separator and the batteries therewith |
| JP2016072115A (en) * | 2014-09-30 | 2016-05-09 | 株式会社Ｇｓユアサ | Power storage element |
-
1993
- 1993-05-19 JP JP05116923A patent/JP3099583B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8187738B2 (en) | 2000-10-26 | 2012-05-29 | Isao Matsumoto | Spirally-rolled electrodes with separator and the batteries therewith |
| JP2016072115A (en) * | 2014-09-30 | 2016-05-09 | 株式会社Ｇｓユアサ | Power storage element |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3099583B2 (en) | 2000-10-16 |
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