JPH06150895A - Button-type alkaline battery - Google Patents
Button-type alkaline batteryInfo
- Publication number
- JPH06150895A JPH06150895A JP4297449A JP29744992A JPH06150895A JP H06150895 A JPH06150895 A JP H06150895A JP 4297449 A JP4297449 A JP 4297449A JP 29744992 A JP29744992 A JP 29744992A JP H06150895 A JPH06150895 A JP H06150895A
- Authority
- JP
- Japan
- Prior art keywords
- holes
- negative electrode
- hole
- resin
- alkaline battery
- 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
-
- 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
Description
【０００１】[0001]
【産業上の利用分野】この発明はボタン型アルカリ電池
に関し、特に、耐漏液性および形状変化を防止するため
の技術改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a button type alkaline battery, and more particularly, to an improvement in technology for preventing liquid leakage and preventing shape change.
【０００２】[0002]
【従来の技術】よく知られているように、アルカリ電池
では加熱したり充電したりする誤使用によって激しいガ
ス発生反応が起き、内圧が異常上昇する。そのために容
量の大きな円筒型アルカリ電池では、内圧が異常に高く
なったときに作動する安全弁機構が付設されている。ま
た、このような異常なガス発生ではないが、通常の状態
でも負極側で微量の水素ガスが発生する。特に最近の水
銀を用いないアルカリ電池の方が水銀を含む従来のアル
カリ電池より水素ガスが発生しやすい。2. Description of the Related Art As is well known, an alkaline battery causes a violent gas generation reaction due to misuse such as heating or charging, causing an abnormal increase in internal pressure. Therefore, a cylindrical alkaline battery with a large capacity is provided with a safety valve mechanism that operates when the internal pressure becomes abnormally high. Although not such an abnormal gas generation, a slight amount of hydrogen gas is generated on the negative electrode side even in a normal state. Particularly, recent alkaline batteries that do not use mercury are more likely to generate hydrogen gas than conventional alkaline batteries that contain mercury.
【０００３】ケースの空間容量の大きい円筒型アルカリ
電池の場合、正常な保存状態や使用状態でのごく低レベ
ルのガス発生は問題になるような過圧状態につながらな
いし、もし過圧状態になっても前記の安全弁がある。In the case of a cylindrical alkaline battery having a large space capacity of the case, generation of a very low level of gas in a normal storage state or a use state does not lead to an overpressure state which causes a problem, and if it is, an overpressure state occurs. But there is the safety valve mentioned above.
【０００４】[0004]
【発明が解決しようとする課題】ところが小型で小容量
のボタン型アルカリ電池の場合は、内部にほとんど余裕
空間がないので、微量のガス発生でも内圧が大きく上昇
しやすい。特に、無水銀のボタン型アルカリ電池は水素
ガスの発生が比較的多くなるので、正常な保存状態や使
用状態でも内圧が異常に高くなることがあり、過圧によ
るストレスでガスケット部分の密封性が低下して漏液し
たり、電池ケース（正極缶と負極缶）が膨らむように変
形してしまう（総高が基準を超えてしまう）。もちろ
ん、円筒型アルカリ電池のような安全弁機構を小さなボ
タン型電池に設けることはできない。However, in the case of a small-sized, small-capacity button type alkaline battery, since there is almost no internal space, the internal pressure is likely to increase greatly even when a small amount of gas is generated. In particular, a button-type alkaline battery made of mercury-free battery generates a relatively large amount of hydrogen gas, so the internal pressure may become abnormally high even under normal storage and use conditions. It may be lowered and leak, or the battery case (positive electrode can and negative electrode can) may be deformed to expand (total height exceeds the standard). Of course, a safety valve mechanism such as a cylindrical alkaline battery cannot be provided in a small button battery.
【０００５】この発明は前述した従来の問題点に鑑みな
されたもので、その目的は、内圧の上昇による漏液や変
形を生じないようにした保存性能の優れたボタン型アル
カリ電池を提供することにある。The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide a button-type alkaline battery having excellent storage performance, which prevents liquid leakage or deformation due to an increase in internal pressure. It is in.
【０００６】[0006]
【課題を解決するための手段】そこでこの発明では、正
極缶と負極缶とをガスケットを介して密封し、その内部
に正極活物質とセパレータと負極活物質とを積層して封
入したボタン型アルカリ電池において、前記負極缶の適
宜部位に小さなガス抜き穴を１個以上形成し、そのガス
抜き穴をガス透過性を有するポリオレフィン系樹脂によ
り閉塞してなるガス抜き手段を付加した。In the present invention, therefore, a button-type alkali in which a positive electrode can and a negative electrode can are hermetically sealed via a gasket, and a positive electrode active material, a separator, and a negative electrode active material are laminated and enclosed therein. In the battery, one or more small gas vent holes were formed at appropriate portions of the negative electrode can, and a gas vent means was added by closing the gas vent holes with a polyolefin resin having gas permeability.
【０００７】[0007]
【作用】負極缶の前記ガス抜き穴がポリオレフィン系樹
脂で閉塞されているので、電解液を含む発電要素は完全
にケース内に封入された状態である。しかし、ポリオレ
フィン系樹脂はガス透過性に優れているので、ケース内
の圧力が上昇してくると当該樹脂製の閉塞部材を通して
徐々にガスが抜け、内圧が異常に高くなることはない。Since the gas vent hole of the negative electrode can is closed with the polyolefin resin, the power generating element containing the electrolytic solution is completely enclosed in the case. However, since the polyolefin resin has excellent gas permeability, when the pressure inside the case rises, the gas gradually escapes through the resin-made closing member, and the internal pressure does not become abnormally high.
【０００８】[0008]
【実施例】ＬＲ４４型アルカリ電池にこの発明を適用し
た第１の実施例を図１に示している。ボタン型アルカリ
電池の基本構造は従来と変るものではなく、正極缶１の
内面に二酸化マンガンと炭素粉を主とする正極合剤２が
装填され、負極缶３の内面に亜鉛粉末にアルカリ溶液と
ゲル化剤を加えた負極合剤４が装填され、正極合剤２と
負極合剤４がセパレータを挟んで対向している。正極缶
１の内周と負極缶３の周縁部の間にナイロン製のガスケ
ット５が挟み込まれて圧縮され、ボタン型の電池ケース
が密閉されている。ガスケット５による密閉性を高めて
耐漏液性能を良くする目的で、負極缶３とガスケット５
の接触面に粘着剤６が塗られている。ところで、この実
施例のアルカリ電池は負極亜鉛をまったくアマルガム化
していない、いわゆる無水銀のアルカリ電池である。前
述のように無水銀のアルカリ電池の方が水素ガスが発生
しやすい。EXAMPLE FIG. 1 shows a first example in which the present invention is applied to an LR44 type alkaline battery. The basic structure of the button type alkaline battery is not different from the conventional one, and the positive electrode mixture 1 mainly containing manganese dioxide and carbon powder is loaded on the inner surface of the positive electrode can 1, and the alkaline solution is added to the zinc powder on the inner surface of the negative electrode can 3. The negative electrode mixture 4 containing a gelling agent is loaded, and the positive electrode mixture 2 and the negative electrode mixture 4 face each other with the separator interposed therebetween. A nylon gasket 5 is sandwiched and compressed between the inner periphery of the positive electrode can 1 and the peripheral portion of the negative electrode can 3 to seal the button type battery case. The negative electrode can 3 and the gasket 5 are used for the purpose of improving the leak-proof performance by enhancing the airtightness of the gasket 5.
Adhesive 6 is applied to the contact surface of. By the way, the alkaline battery of this example is a so-called silver-free alkaline battery in which the negative electrode zinc is not amalgamated at all. As described above, the hydrogen gas is more likely to be generated in the anhydrous silver battery.
【０００９】図１の実施例では、負極缶３の中央平板部
から外周かしめ部につながる傾斜した肩部分に小さなガ
ス抜き穴７を形成している。穴７の数は２個で、径方向
に対向する位置に設けている。穴７はテーパ穴で、内面
側の直径は０．８mm、外面側の直径は０．４mmである。
なお負極缶３の厚さは０．３mmである。In the embodiment shown in FIG. 1, a small vent hole 7 is formed in the inclined shoulder portion connecting the central flat plate portion of the negative electrode can 3 to the outer peripheral caulking portion. The number of holes 7 is two, and they are provided at positions facing each other in the radial direction. The hole 7 is a tapered hole having a diameter of 0.8 mm on the inner surface side and 0.4 mm on the outer surface side.
The negative electrode can 3 has a thickness of 0.3 mm.
【００１０】前記のガス抜き穴７にポリエチレン樹脂８
を充填して、樹脂８を栓のようにして穴７を閉塞してい
る。樹脂８は穴７の内面側にすこしはみ出させており、
樹脂８層の厚さは０．４である。このように穴７をテー
パ穴としてポリエチレン樹脂８で栓のように塞ぐこと
で、樹脂８が外方へ脱落する虞はなくなり、穴閉塞部材
としての信頼性を高めている。Polyethylene resin 8 is placed in the gas vent hole 7 described above.
And the resin 7 is plugged to close the hole 7. The resin 8 is slightly protruded on the inner surface side of the hole 7,
The thickness of 8 layers of resin is 0.4. By thus closing the hole 7 as a tapered hole with the polyethylene resin 8 like a plug, there is no possibility that the resin 8 will fall out, and the reliability of the hole closing member is improved.
【００１１】図２に示す第２実施例では、ガス抜き穴７
を直径０．７mmのストレート穴とし、厚さ０．２mmのシ
ート状のポリエチレン樹脂８を穴周囲の缶内面に熱圧着
して、穴７を閉塞している。この場合は樹脂８の閉塞部
材の厚さを小さくすることができる。この実施例でも穴
７は２個設けている。In the second embodiment shown in FIG. 2, the gas vent hole 7
Is a straight hole having a diameter of 0.7 mm, and a sheet-shaped polyethylene resin 8 having a thickness of 0.2 mm is thermocompression-bonded to the inner surface of the can around the hole to close the hole 7. In this case, the thickness of the closing member of the resin 8 can be reduced. Also in this embodiment, two holes 7 are provided.
【００１２】図３に示す第３実施例では、直径０．７mm
のストレートなガス抜き穴７にポリエチレン樹脂８を栓
のように充填して穴を塞ぎ、樹脂８を内面側だけでなく
外面側へもすこしはみ出させている。この実施例では樹
脂８の層の厚さが大きくなるが（０．７mm）、樹脂８の
付着強度が大きくなり、缶の内方へ樹脂８が脱落する虞
もなくなる。この実施例でも穴７は２個設けている。In the third embodiment shown in FIG. 3, the diameter is 0.7 mm.
The straight gas vent hole 7 is filled with polyethylene resin 8 like a plug to close the hole, and the resin 8 is slightly extruded not only on the inner surface side but also on the outer surface side. In this embodiment, the thickness of the layer of the resin 8 is increased (0.7 mm), but the adhesive strength of the resin 8 is increased, and there is no possibility that the resin 8 will fall inside the can. Also in this embodiment, two holes 7 are provided.
【００１３】ここで、この発明によるガス抜き対策を講
じていないＬＲ４４型アルカリ電池を従来例Ａとし、図
１の構成の同じＬＲ４４型アルカリ電池を実施例Ｂ、同
じく図２の構成のものを実施例Ｃ、図３の構成のものを
実施例Ｄとする。なお、発電要素の構成はすべて同じ無
水銀のアルカリ電池である。Here, the LR44 type alkaline battery which has not taken the degassing measure according to the present invention is a conventional example A, the same LR44 type alkaline battery having the structure shown in FIG. 1 is used as the example B, and the structure shown in FIG. 2 is also used. The configuration of Example C and FIG. 3 is referred to as Example D. The power generating elements are all the same non-silver alkaline batteries.
【００１４】以上の４種の電池Ａ〜Ｄそれぞれ１００個
について保存性能の評価試験を行った。保存条件は６０
℃−９０％ＲＨである。保存開始後２０日、６０日、１
００日で漏液の有無と電池の膨らみ（総高）を調べた。
従来例Ａの電池では６０日後に３個、１００日後に１２
個の漏液発生が認められた。これに対し、実施例Ｄでは
１００日後に２個、実施例Ｃでは１００後に３個、実施
例Ｂでは６０日後に１個、１００日後に２個の漏液発生
が認められただけで、明らかに従来より結果が良かっ
た。また、総高の変化は図４に示すとおりで、従来例Ａ
が保存期間が長くなるに従ってはっきりと総高の増加が
認められるが、実施例Ｂ、Ｃ、Ｄではほとんど変化して
いない程度である。A storage performance evaluation test was conducted on 100 batteries of each of the above four types of batteries A to D. Storage condition is 60
C-90% RH. 20 days, 60 days, 1
The presence or absence of liquid leakage and the swelling (total height) of the battery were examined at 00 days.
In the battery of the conventional example A, three batteries after 60 days and 12 after 100 days
The occurrence of liquid leakage was confirmed. On the other hand, in Example D, two liquid leaks were observed after 100 days, in Example C three after 100 days, and in Example B, one after 60 days, and two after 100 days. The result was better than before. The change in total height is as shown in FIG.
However, the increase in the total height is clearly recognized as the storage period becomes longer, but in Examples B, C and D, there is almost no change.
【００１５】以上の３つの実施例において、ガス抜き穴
７の径が大きい方がポリエチレン樹脂８を通してのガス
透過能力の絶対値は大きくなるが、穴閉塞の信頼性が低
下するので、穴径は１mm以下が適当である。また、ポリ
エチレン樹脂８の層の厚さが薄い方がガス透過能力の面
では有利であるが、あまり薄いとやはり穴閉塞の信頼性
が低下するので、０．３mm程度の厚さが必要である。ま
た穴閉塞部材として用いるポリオレフィン系樹脂として
は、実施例のポリエチレン樹脂の他にポリプロピレンや
ポリスチレンなどが適している。In the above three embodiments, the larger the diameter of the gas vent hole 7 is, the larger the absolute value of the gas permeation capacity through the polyethylene resin 8 is, but the reliability of the hole closing is lowered, and therefore the hole diameter is 1 mm or less is suitable. Further, a thinner layer of the polyethylene resin 8 is more advantageous in terms of gas permeability, but if it is too thin, the reliability of hole closure is also lowered, so a thickness of about 0.3 mm is required. . Further, as the polyolefin resin used as the hole closing member, polypropylene, polystyrene and the like are suitable in addition to the polyethylene resin of the examples.
【００１６】[0016]
【発明の効果】以上詳細に説明したように、この発明
は、ボタン型アルカリ電池のケースを兼ねた負極缶に小
さなガス抜き穴を形成するとともにその穴をポリオレフ
ィン系樹脂で閉塞したので、ケース内の圧力が上昇して
くると樹脂製の閉塞部材を通して徐々にガスが抜け、内
圧が異常に高くなることはない。したがってガス発生が
比較的多い無水銀のボタン型アルカリ電池において、漏
液やケース変形の起きない優れた長期保存性能を実現す
ることができる。As described in detail above, according to the present invention, a small gas vent hole is formed in the negative electrode can that also serves as the case of the button type alkaline battery, and the hole is closed with the polyolefin resin. When the pressure rises, the gas gradually escapes through the resin blocking member, and the internal pressure does not rise abnormally. Therefore, it is possible to achieve excellent long-term storage performance without leakage or case deformation in a button-free alkaline battery of mercury-free, which generates a relatively large amount of gas.
【図１】この発明の第１実施例によるボタン型アルカリ
電池の部分断面図である。FIG. 1 is a partial sectional view of a button type alkaline battery according to a first embodiment of the present invention.
【図２】この発明の第２実施例の要部断面図である。FIG. 2 is a cross-sectional view of essential parts of a second embodiment of the present invention.
【図３】この発明の第３実施例の要部断面図である。FIG. 3 is a cross-sectional view of essential parts of a third embodiment of the present invention.
【図４】この発明の実施例による電池と従来の電池との
保存性能の評価試験結果を示すグラフである。FIG. 4 is a graph showing the evaluation test results of the storage performance of the battery according to the example of the present invention and the conventional battery.
１ 正極缶 ２ 正極合剤 ３ 負極缶 ４ 負極合剤 ５ セパレータ ６ 粘着剤 ７ ガス抜き穴 ８ ポリエチレン樹脂（穴閉塞部材） 1 Positive Electrode Can 2 Positive Electrode Mixture 3 Negative Electrode Can 4 Negative Electrode Mixture 5 Separator 6 Adhesive 7 Gas Venting Hole 8 Polyethylene Resin (Hole Closure Member)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐野 宏章 東京都港区新橋５丁目36番11号 富士電気 化学株式会社内 (72)発明者 村上 秀二 東京都港区新橋５丁目36番11号 富士電気 化学株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroaki Sano, 5-16-11 Shimbashi, Minato-ku, Tokyo Fuji Electric Chemical Co., Ltd. (72) Shuji Murakami 5-36-11, Shimbashi, Minato-ku, Tokyo Fuji Electric Chemical Co., Ltd.
Claims (3)
密封し、その内部に正極活物質とセパレータと負極活物
質とを積層して封入したボタン型アルカリ電池におい
て、前記負極缶の適宜部位に小さなガス抜き穴を１個以
上形成し、そのガス抜き穴をガス透過性を有するポリオ
レフィン系樹脂により閉塞したことを特徴とするボタン
型アルカリ電池。1. A button-type alkaline battery in which a positive electrode can and a negative electrode can are hermetically sealed via a gasket, and a positive electrode active material, a separator, and a negative electrode active material are laminated and enclosed therein, and an appropriate portion of the negative electrode can. A button-type alkaline battery, characterized in that one or more small gas vent holes are formed in the inner wall, and the gas vent holes are closed by a polyolefin resin having gas permeability.
が小径のテーパ穴になっており、前記ポリオレフィン系
樹脂製の穴閉塞部材は前記テーパ穴に栓のように嵌合し
ていることを特徴とする請求項１に記載のボタン型アル
カリ電池。2. The gas vent hole is a taper hole having a large diameter on the inner surface side and a small diameter on the outer surface side, and the polyolefin resin hole closing member is fitted in the taper hole like a plug. The button type alkaline battery according to claim 1.
材はシート状であり、前記負極缶の内面における前記ガ
ス抜き穴の周辺に接着されていることを特徴とする請求
項１に記載のボタン型アルカリ電池。3. The button mold according to claim 1, wherein the hole closing member made of a polyolefin-based resin has a sheet shape and is adhered to a periphery of the gas vent hole on the inner surface of the negative electrode can. Alkaline battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4297449A JPH06150895A (en) | 1992-11-06 | 1992-11-06 | Button-type alkaline battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4297449A JPH06150895A (en) | 1992-11-06 | 1992-11-06 | Button-type alkaline battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06150895A true JPH06150895A (en) | 1994-05-31 |
Family
ID=17846658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4297449A Pending JPH06150895A (en) | 1992-11-06 | 1992-11-06 | Button-type alkaline battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06150895A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112352342A (en) * | 2018-07-06 | 2021-02-09 | 株式会社Lg化学 | Secondary battery and method for manufacturing same |
-
1992
- 1992-11-06 JP JP4297449A patent/JPH06150895A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112352342A (en) * | 2018-07-06 | 2021-02-09 | 株式会社Lg化学 | Secondary battery and method for manufacturing same |
| JP2021521613A (en) * | 2018-07-06 | 2021-08-26 | エルジー・ケム・リミテッド | Secondary battery and its manufacturing method |
| US11664556B2 (en) | 2018-07-06 | 2023-05-30 | Lg Energy Solution, Ltd. | Secondary battery comprising a deformed gasket and method for manufacturing the same |
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