JPH0877996A - Battery - Google Patents
BatteryInfo
- Publication number
- JPH0877996A JPH0877996A JP7161815A JP16181595A JPH0877996A JP H0877996 A JPH0877996 A JP H0877996A JP 7161815 A JP7161815 A JP 7161815A JP 16181595 A JP16181595 A JP 16181595A JP H0877996 A JPH0877996 A JP H0877996A
- Authority
- JP
- Japan
- Prior art keywords
- gasket
- battery
- metal case
- negative electrode
- bottom plate
- 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
-
- Y02E60/12—
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
- Primary Cells (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、ガス発生による電池の
内圧の上昇を防ぐ防爆機構である安全弁を有する電池に
おいて、安全弁が作動したときの安全性と耐漏液性を向
上させた電池に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery having a safety valve, which is an explosion-proof mechanism for preventing an increase in internal pressure of the battery due to gas generation, with improved safety and leakage resistance when the safety valve operates. Is.
【0002】[0002]
【従来の技術】従来のアルカリ電池、例えばアルカリ乾
電池では図4に示すような構造となっている。金属ケー
ス1に二酸化マンガンと黒鉛からなる正極合剤2を入れ
セパレーター3を挿入した後、アルカリ電解液、亜鉛粉
末とゲル化剤からなるゲル状負極4がセパレーター3内
に充填される。負極集電子6、ガスケット7、環状ワッ
シャー8と底板9を一体とした封口体5をゲル状負極4
に差しこみ素電池が形成される。2. Description of the Related Art A conventional alkaline battery, for example, an alkaline dry battery has a structure as shown in FIG. After the positive electrode mixture 2 made of manganese dioxide and graphite is put in the metal case 1 and the separator 3 is inserted, the gelled negative electrode 4 made of the alkaline electrolyte, zinc powder and the gelling agent is filled in the separator 3. The sealing body 5 in which the negative electrode current collector 6, the gasket 7, the annular washer 8 and the bottom plate 9 are integrated is used as a gel negative electrode 4.
A plug-in cell is formed.
【0003】以上のようなアルカリ電池において、充電
・過放電などの誤使用によって負極の亜鉛からガスが発
生して電池内圧が上昇する対策の一つとして、ガスケッ
トに備えた防爆機構である安全弁を作動させ、電池内部
のガスを排出していた(例えば特開昭63−30456
8号公報)。In the alkaline battery as described above, as one of measures for increasing gas internal pressure by generating gas from zinc of the negative electrode due to misuse such as charging and over-discharging, a safety valve, which is an explosion-proof mechanism provided in the gasket, is used. It was operated to discharge the gas inside the battery (for example, JP-A-63-30456).
No. 8).
【0004】[0004]
【発明が解決しようとする課題】しかし従来の防爆機構
は、電池内圧が上昇し安全弁が作動すると電池内部のガ
スだけではなく、電解液も封口体内の環状ワッシャーの
ガス抜き取り孔を通って底板のガス抜き取り孔から電池
外部へ漏出または飛散するという問題点を有していた。However, in the conventional explosion-proof mechanism, when the internal pressure of the battery rises and the safety valve is activated, not only the gas inside the battery but also the electrolytic solution passes through the gas vent hole of the annular washer in the sealing body and the bottom plate There is a problem that the gas leaks or scatters to the outside of the battery through the gas vent hole.
【0005】本発明は、上記従来の問題点を解決するも
ので、防爆機構である安全弁が作動したとき、電池内部
のガスのみを排出して、電解液の外部への漏出や飛散を
阻止することを目的とする。The present invention solves the above-mentioned problems of the prior art. When the safety valve, which is an explosion-proof mechanism, is activated, only the gas inside the battery is discharged to prevent the electrolyte from leaking or scattering to the outside. The purpose is to
【0006】[0006]
【課題を解決するための手段】この課題を解決するため
に本発明は、正極活物質及び負極活物質を内蔵している
金属ケースと、この金属ケースの一端の開口部を封口す
る防爆用薄肉部を有するガスケットと、このガスケット
よりも外側に位置してガスケットを補強しているガス抜
き孔を有する環状ワッシャーと、前記開口部近傍に位置
して前記金属ケースの外側に露出しているガス抜き孔を
有する負極底板とをそれぞれ備える電池において、封口
体内にガス透過性はあるが液体の浸透は阻止する撥水性
高分子膜を設けたものであり、さらには前記環状ワッシ
ャーと前記ガスケットとの間にガス透過性はあるが液体
の浸透は阻止する撥水性高分子膜を設けるか、もしくは
前記環状ワッシャーと前記底板との間にガス透過性はあ
るが液体の浸透は阻止する撥水性高分子膜を設けるこ
と、さらには負極底板のガス抜き孔を閉塞するように、
ガス透過性を有し液体の浸透を阻止する撥水性高分子膜
を貼り合わせておくことを特徴とする。To solve this problem, the present invention provides a metal case containing a positive electrode active material and a negative electrode active material, and an explosion-proof thin wall for sealing an opening at one end of the metal case. A gasket having a portion, an annular washer having a gas vent hole located outside the gasket to reinforce the gasket, and a gas vent located near the opening and exposed to the outside of the metal case A battery having a negative electrode bottom plate each having a hole, wherein a water-repellent polymer film that is gas permeable but blocks permeation of a liquid is provided in the sealing body, and further, between the annular washer and the gasket. Is provided with a water-repellent polymer film that has gas permeability but prevents liquid penetration, or there is gas permeability between the annular washer and the bottom plate but liquid penetration does not occur. Providing the water-repellent polymer film stop, as further closes the gas release openings of the negative electrode base plate,
It is characterized in that a water-repellent polymer film that has gas permeability and blocks liquid permeation is bonded.
【0007】[0007]
【作用】この構成によって、ガス発生により電池内圧が
上昇してガスケットに備えられた防爆機構である安全弁
が作動したとき、電池内部のガスは電池外部に排出され
るが、この撥水性高分子膜によって電解液の電池外部へ
の漏出や飛散を阻止することができる。With this structure, when the internal pressure of the battery rises due to gas generation and the safety valve, which is an explosion-proof mechanism provided in the gasket, is activated, the gas inside the battery is discharged to the outside of the battery. This makes it possible to prevent the electrolyte from leaking or scattering outside the battery.
【0008】[0008]
【実施例】 (実施例1)本発明の一実施例であるアルカリ電池であ
り、この電池の要部の半断面拡大図を図1に示す。EXAMPLES Example 1 An alkaline battery which is an example of the present invention, and FIG. 1 is an enlarged half cross-sectional view of a main part of this battery.
【0009】鋼板にニッケルメッキを施した金属ケース
の一端の開口部を封口する封口体5は、内側から順に防
爆用薄肉部を有し、ポリアミド樹脂、ポリプロピレン樹
脂等からなるガスケット7、ガスは透過するが液体は阻
止する例えばフロロエチレンプロピレンからなる撥水性
高分子膜10、ガス抜き孔を有するステンレス製の環状
ワッシャー8、ガス抜き孔を有し、鋼板にニッケルメッ
キを施した底板9が組み込まれて構成されている。この
とき撥水性高分子膜10の外周部と内周部はガスケット
7と環状ワッシャー8の間にはさみこまれ圧着され密閉
されている。その他の電池構成は従来の電池と同様に構
成されている。A sealing body 5 for sealing an opening at one end of a metal case in which a steel plate is nickel-plated has an explosion-proof thin portion in order from the inside, a gasket 7 made of polyamide resin, polypropylene resin or the like, and gas permeation. However, a liquid-repellent polymer film 10 made of, for example, fluoroethylene propylene, which prevents liquid, a circular washer 8 made of stainless steel having a gas vent hole, a bottom plate 9 having a gas vent hole and having a steel plate plated with nickel are incorporated. Is configured. At this time, the outer peripheral portion and the inner peripheral portion of the water-repellent polymer film 10 are sandwiched between the gasket 7 and the annular washer 8 to be pressure-bonded and sealed. Other battery configurations are the same as those of conventional batteries.
【0010】(実施例2)本発明の他の実施例であるア
ルカリ電池であり、この電池の要部の半断面拡大図を図
2に示す。上記実施例1と構成部品は同一で、撥水性高
分子膜10の位置のみが異なり撥水性高分子膜10の外
周部は環状ワッシャー8と底板9の間にはさみこまれ、
内周部は負極集電子6の頭の下側部分と環状ワッシャー
8の内側部分の間にはさみこまれて圧着され密閉されて
いる。その他の電池構成は従来の電池と同様に構成され
ている。(Embodiment 2) An alkaline battery which is another embodiment of the present invention is shown in FIG. The components are the same as those of the above-described first embodiment, only the position of the water-repellent polymer film 10 is different, and the outer peripheral portion of the water-repellent polymer film 10 is sandwiched between the annular washer 8 and the bottom plate 9,
The inner peripheral part is sandwiched between the lower part of the head of the negative electrode current collector 6 and the inner part of the annular washer 8 to be pressure-bonded and sealed. Other battery configurations are the same as those of conventional batteries.
【0011】(実施例3)本発明の他の実施例であるア
ルカリ電池であり、この電池の要部の半断面拡大図を図
3に示す。上記実施例1と構成部品は同一で、撥水性高
分子膜10の位置のみが異なり、封口体を組み立てる前
にあらかじめ底板の内側に貼り合わせて密着してあり、
底板9のガス抜き孔が密閉されている。なお、底板に貼
り合わせた撥水性高分子膜の外周部を底板の外周部と環
状ワッシャーの外周部の間にはさみこまれて圧着されて
いれば、より好ましい。その他の電池構成は従来の電池
と同様に構成されている。さらに、底板の内側に撥水性
高分子膜をあらかじめ貼り合わせておくことにより封口
体の組立工程や製品になったあとも膜が剥離することが
なく、完全にガス抜き孔を閉塞できる。(Embodiment 3) An alkaline battery which is another embodiment of the present invention is shown in FIG. The components are the same as in Example 1 above, only the position of the water-repellent polymer film 10 is different, and the components are attached and adhered to the inside of the bottom plate in advance before assembling the sealing body.
The gas vent hole of the bottom plate 9 is sealed. It is more preferable that the outer peripheral portion of the water-repellent polymer film attached to the bottom plate is sandwiched between the outer peripheral portion of the bottom plate and the outer peripheral portion of the annular washer and pressure-bonded. Other battery configurations are the same as those of conventional batteries. Furthermore, by attaching the water-repellent polymer film to the inside of the bottom plate in advance, the film is not peeled off even after the assembly process of the sealing body or the product is completed, and the gas vent hole can be completely closed.
【0012】このように撥水性高分子膜をアルカリ電池
の封口体内に圧着したり底板内面にガス抜き孔を閉塞す
るように貼り合わせておけば、充電・過放電など誤使用
によるガスの発生から電池の内圧が上昇し、封口体内の
防爆機構である安全弁が作動してガスが電池外部に排出
されてもアルカリ電解液の電池外部への漏出や飛散を阻
止することができ、耐漏液性を向上することができる。As described above, if the water-repellent polymer film is pressure-bonded inside the sealing body of the alkaline battery or attached to the inner surface of the bottom plate so as to close the gas vent hole, gas will be generated due to misuse such as charging and over-discharging. Even if the internal pressure of the battery rises and the safety valve, which is an explosion-proof mechanism in the sealed body, activates and gas is discharged to the outside of the battery, it is possible to prevent the alkaline electrolyte from leaking out or scattering to the outside of the battery, and the resistance to leakage is improved. Can be improved.
【0013】なお、上記実施例に用いたガスは透過する
が液体は阻止する撥水性高分子膜10の材質としては、
フロロエチレンプロピレンを使用したが、天然ゴム、メ
チルゴム、ポリブタジエン、ポリビニルブチラール、ポ
リエチレン、エチルセルロース、ポリプロピレン、シリ
コンゴム、エチレン−酢酸ビニル共重合物、ポリフェニ
レンオキサイド、ポリテトラフルオロエチレン等も同様
の効果が得られる。As the material of the water-repellent polymer film 10 used in the above embodiment, which allows the gas to permeate but prevents the liquid,
Although fluoroethylene propylene was used, the same effect can be obtained with natural rubber, methyl rubber, polybutadiene, polyvinyl butyral, polyethylene, ethyl cellulose, polypropylene, silicone rubber, ethylene-vinyl acetate copolymer, polyphenylene oxide, polytetrafluoroethylene, etc. .
【0014】また、撥水性高分子膜のガス透過速度では
使用する電池の大きさ、ガス抜き孔の面積によって異な
るが、50〜1000ml/min・cm3の範囲の透
過速度をもつ膜から、円筒形アルカリ乾電池の各サイズ
のガス発生速度に適合するものを使用することが好まし
い。The gas permeation rate of the water-repellent polymer membrane varies depending on the size of the battery used and the area of the gas vent hole, but from the membrane having the permeation rate in the range of 50 to 1000 ml / min · cm 3 , It is preferable to use a type alkaline dry battery that is compatible with the gas generation rate of each size.
【0015】[0015]
【発明の効果】以上のように本発明は、電池内部のガス
の発生によって電池内圧が上昇して防爆機構である安全
弁が作動したとき、電池内部のガスは電池外部に排出す
るが、ガス透過性はあるが液体の浸透は阻止する撥水性
高分子膜によって電解液が電池外部へ漏出や飛散を防止
できる優れた電池を実現できるものである。As described above, according to the present invention, when the internal pressure of the battery rises due to the generation of gas inside the battery and the safety valve which is the explosion-proof mechanism is activated, the gas inside the battery is discharged to the outside of the battery. It is possible to realize an excellent battery in which the electrolytic solution can be prevented from leaking out or scattering to the outside of the battery by the water-repellent polymer film which has the property of preventing the penetration of the liquid.
【図1】本発明の実施例に用いたアルカリ電池の封口体
部拡大半断面図FIG. 1 is an enlarged half sectional view of a sealing body portion of an alkaline battery used in an embodiment of the present invention.
【図2】本発明の実施例2に用いたアルカリ電池の封口
体部拡大半断面図FIG. 2 is an enlarged half sectional view of a sealing body portion of an alkaline battery used in Example 2 of the present invention.
【図3】本発明の実施例3に用いたアルカリ電池の封口
体部拡大半断面図FIG. 3 is an enlarged half sectional view of a sealing body portion of an alkaline battery used in Example 3 of the present invention.
【図4】従来のアルカリ電池の半断面図FIG. 4 is a half sectional view of a conventional alkaline battery.
5 封口体 6 負極集電子 7 ガスケット 8 環状ワッシャー 9 底板 10 撥水性高分子膜 5 Sealing body 6 Negative electrode current collector 7 Gasket 8 Annular washer 9 Bottom plate 10 Water repellent polymer film
───────────────────────────────────────────────────── フロントページの続き (72)発明者 浅岡 準一 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (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 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junichi Asaoka 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Isao Kubo, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.
Claims (4)
金属ケースと、この金属ケースの一端の開口部を封口す
る防爆用薄肉部を有するガスケットと、このガスケット
よりも外側の前記開口部近傍に位置して前記金属ケース
の外側に露出しているガス抜き孔を有する負極底板とを
それぞれ備える電池において、前記ガスケットと前記底
板の間に、ガス透過性はあるが液体の浸透は阻止する撥
水性高分子膜を設けた電池。1. A metal case containing a positive electrode active material and a negative electrode active material, a gasket having an explosion-proof thin portion for sealing an opening at one end of the metal case, and the opening outside the gasket. In a battery provided with a negative electrode bottom plate having a gas vent hole that is located in the vicinity and is exposed to the outside of the metal case, a gas permeable but liquid permeation is blocked between the gasket and the bottom plate. A battery with a water-repellent polymer film.
金属ケースと、この金属ケースの一端の開口部を封口す
る防爆用薄肉部を有するガスケットと、このガスケット
よりも外側に位置してガスケットを補強しているガス抜
き孔を有する環状ワッシャーと、前記開口部近傍に位置
して前記金属ケースの外側に露出しているガス抜き孔を
有する負極底板とをそれぞれ備える電池において、前記
環状ワッシャーと前記ガスケットとの間にガス透過性は
あるが液体の浸透は阻止する撥水性高分子膜を備え、前
記撥水性高分子膜の少なくとも外周部と内周部が前記ガ
スケットと前記環状ワッシャーの間にはさみこまれ、圧
着され密閉されていることを特徴とする電池。2. A metal case containing a positive electrode active material and a negative electrode active material, a gasket having an explosion-proof thin portion for sealing an opening at one end of the metal case, and a gasket positioned outside the gasket. An annular washer having a gas vent hole reinforcing the gasket and a negative electrode bottom plate having a gas vent hole exposed near the opening and exposed to the outside of the metal case. Between the gasket and the annular washer is provided with a water-repellent polymer film that is gas permeable but prevents the permeation of liquid between the gasket and the gasket. A battery that is sandwiched between, crimped and sealed.
金属ケースと、この金属ケースの一端の開口部を封口す
る防爆用薄肉部を有するガスケットと、このガスケット
よりも外側に位置してガスケットを補強しているガス抜
き孔を有する環状ワッシャーと、前記開口部近傍に位置
して前記金属ケースの外側に露出しているガス抜き孔を
有する負極底板とをそれぞれ備える電池において、前記
環状ワッシャーと前記底板との間にガス透過性はあるが
液体の浸透は阻止する撥水性高分子膜を備え、前記撥水
性高分子膜の外周部が前記ガスケットと前記環状ワッシ
ャーの間にはさみこまれ、内周部が前記負極集電子の頭
の下側部分と環状ワッシャーの内側の部分ではさみこま
れ、圧着され密閉されていることを特徴とする電池。3. A metal case containing a positive electrode active material and a negative electrode active material, a gasket having an explosion-proof thin portion for sealing an opening at one end of the metal case, and a gasket located outside the gasket. An annular washer having a gas vent hole reinforcing the gasket and a negative electrode bottom plate having a gas vent hole exposed near the opening and exposed to the outside of the metal case. And a bottom plate having gas permeability between the bottom plate and a water-repellent polymer film for preventing the penetration of liquid, the outer peripheral portion of the water-repellent polymer film is sandwiched between the gasket and the annular washer, A battery, wherein the inner peripheral portion is sandwiched between the lower portion of the head of the negative electrode current collector and the inner portion of the annular washer, and is crimped and sealed.
金属ケースと、この金属ケースの一端の開口部を封口す
る防爆用薄肉部を有するガスケットと、このガスケット
よりも外側の前記開口部近傍に位置して前記金属ケース
の外側に露出しているガス抜き孔を有する負極底板とを
それぞれ備える電池において、前記底板のガス抜き孔を
内側から閉塞するように、ガス透過性を有し液体の浸透
を阻止する撥水性高分子膜を貼り合わせてあることを特
徴とする電池。4. A metal case containing a positive electrode active material and a negative electrode active material, a gasket having an explosion-proof thin portion for sealing an opening at one end of the metal case, and the opening outside the gasket. In a battery each having a negative electrode bottom plate having a gas vent hole that is located in the vicinity and is exposed to the outside of the metal case, a liquid having gas permeability so that the gas vent hole of the bottom plate is closed from the inside. A battery having a water-repellent polymer film bonded to prevent the permeation of the battery.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7161815A JPH0877996A (en) | 1994-06-29 | 1995-06-28 | Battery |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6-147539 | 1994-06-29 | ||
JP14753994 | 1994-06-29 | ||
JP7161815A JPH0877996A (en) | 1994-06-29 | 1995-06-28 | Battery |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0877996A true JPH0877996A (en) | 1996-03-22 |
Family
ID=26478042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7161815A Pending JPH0877996A (en) | 1994-06-29 | 1995-06-28 | Battery |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0877996A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004071446A (en) * | 2002-08-08 | 2004-03-04 | Fdk Corp | Alkaline battery |
US7244528B2 (en) | 2002-03-15 | 2007-07-17 | Kabushiki Kaisha Toshiba | Aluminum negative electrode battery |
US7273675B2 (en) | 2002-12-27 | 2007-09-25 | Kabushiki Kaisha Toshiba | Aqueus electrolytic solution primary battery |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60174172U (en) * | 1984-04-26 | 1985-11-18 | 富士電気化学株式会社 | alkaline battery |
JPS61161655A (en) * | 1985-01-08 | 1986-07-22 | Matsushita Electric Ind Co Ltd | Vent plug for lead-acid battery |
JPS61124959U (en) * | 1985-01-24 | 1986-08-06 | ||
JPS61197647U (en) * | 1985-05-30 | 1986-12-10 | ||
JPH01164667U (en) * | 1988-05-09 | 1989-11-16 | ||
JPH0389454A (en) * | 1989-08-31 | 1991-04-15 | Hitachi Maxell Ltd | Cylindrical alkaline battery |
JPH05159765A (en) * | 1991-12-04 | 1993-06-25 | Japan Gore Tex Inc | Electrolyte leakage preventing film for battery |
JPH07122254A (en) * | 1993-10-26 | 1995-05-12 | Hitachi Maxell Ltd | Cylindrical alkaline battery |
-
1995
- 1995-06-28 JP JP7161815A patent/JPH0877996A/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60174172U (en) * | 1984-04-26 | 1985-11-18 | 富士電気化学株式会社 | alkaline battery |
JPS61161655A (en) * | 1985-01-08 | 1986-07-22 | Matsushita Electric Ind Co Ltd | Vent plug for lead-acid battery |
JPS61124959U (en) * | 1985-01-24 | 1986-08-06 | ||
JPS61197647U (en) * | 1985-05-30 | 1986-12-10 | ||
JPH01164667U (en) * | 1988-05-09 | 1989-11-16 | ||
JPH0389454A (en) * | 1989-08-31 | 1991-04-15 | Hitachi Maxell Ltd | Cylindrical alkaline battery |
JPH05159765A (en) * | 1991-12-04 | 1993-06-25 | Japan Gore Tex Inc | Electrolyte leakage preventing film for battery |
JPH07122254A (en) * | 1993-10-26 | 1995-05-12 | Hitachi Maxell Ltd | Cylindrical alkaline battery |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7244528B2 (en) | 2002-03-15 | 2007-07-17 | Kabushiki Kaisha Toshiba | Aluminum negative electrode battery |
JP2004071446A (en) * | 2002-08-08 | 2004-03-04 | Fdk Corp | Alkaline battery |
US7273675B2 (en) | 2002-12-27 | 2007-09-25 | Kabushiki Kaisha Toshiba | Aqueus electrolytic solution primary battery |
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