JP2002075315A - Alkaline dry battery - Google Patents
Alkaline dry batteryInfo
- Publication number
- JP2002075315A JP2002075315A JP2000266376A JP2000266376A JP2002075315A JP 2002075315 A JP2002075315 A JP 2002075315A JP 2000266376 A JP2000266376 A JP 2000266376A JP 2000266376 A JP2000266376 A JP 2000266376A JP 2002075315 A JP2002075315 A JP 2002075315A
- Authority
- JP
- Japan
- Prior art keywords
- sealing body
- metal plate
- battery
- negative electrode
- outer peripheral
- 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—
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、筒形アルカリ乾電
池の封止技術に関する。The present invention relates to a sealing technique for a cylindrical alkaline dry battery.
【０００２】[0002]
【従来の技術】従来の筒形アルカリ乾電池は、例えば図
１１に示すように、正極端子を兼ねる有底円筒状の外装
缶１の内部に形成されたセル室Ｃに、正極２および負極
４と、これらの間に配置されるセパレータ３と、負極４
の中心部に挿入される釘状の負極集電棒５と、セパレー
タ３および正極２に含浸される電解液（図示せず）とを
収容し、セル室Ｃ内の電解液が外部に漏れ出ないように
外装缶１の開口端部１ａ側を樹脂製の封口体６で封口し
た構成である。2. Description of the Related Art As shown in FIG. 11, for example, a conventional cylindrical alkaline dry battery includes a positive electrode 2 and a negative electrode 4 in a cell chamber C formed inside a bottomed cylindrical outer can 1 also serving as a positive electrode terminal. , A separator 3 disposed therebetween, and a negative electrode 4
Accommodates a nail-shaped negative electrode current collector rod 5 inserted into the center of the cell, and an electrolytic solution (not shown) impregnated in the separator 3 and the positive electrode 2, so that the electrolytic solution in the cell chamber C does not leak out. In this manner, the outer can 1 has a configuration in which the opening end 1a side is sealed with a sealing member 6 made of resin.
【０００３】図１２に、このようなアルカリ乾電池の封
口部分を示す。樹脂製の封口体６は、負極の中心部に挿
入される負極集電棒５を保持するボス部６１と、外装缶
１の内周面と接する外周部６２と、ボス部６１と外周部
６２とを連結する連結部６３とで構成されており、外周
部６２が外周から外装缶、内周から円盤状の金属板（金
属ワッシャ）１０７により締め付けられかしめられるこ
とで、電池に装着される。封口体６には、充電したりシ
ョッートさせたときなど異常に発生するガスで電池が爆
発することを防ぐために、安全弁が設けられる。安全弁
は、電池内圧が高まり封口体６が図１２の鎖線で示すよ
うに変形したときに連結部６３が破断して内部のガスが
放出されるように、連結部６３の一部分に薄肉部分６３
ａを設けることで構成される。FIG. 12 shows a sealed portion of such an alkaline dry battery. The resin sealing body 6 includes a boss portion 61 for holding the negative electrode current collector rod 5 inserted into the center of the negative electrode, an outer peripheral portion 62 in contact with the inner peripheral surface of the outer can 1, a boss portion 61 and an outer peripheral portion 62. The outer peripheral portion 62 is tightened by an outer can from the outer periphery and a disk-shaped metal plate (metal washer) 107 from the inner periphery to be mounted on the battery. The sealing member 6 is provided with a safety valve in order to prevent the battery from exploding due to a gas generated abnormally such as when the battery is charged or short-circuited. The safety valve is provided with a thin-walled portion 63 such that the connecting portion 63 is broken and the gas inside is released when the internal pressure of the battery is increased and the sealing body 6 is deformed as shown by a chain line in FIG.
It is constituted by providing a.
【０００４】封口体６に設けられた安全弁が正常に作動
すると、内部のガスは金属ワッシャ１０７や負極端子板
２０７に設けられたガス抜き孔１０７ｆ・２０７ｆを通
って外部に抜けるが、電池が高温になり封口体樹脂が軟
化した場合などに封口体樹脂が金属ワッシャ１０７のガ
ス抜き孔１０７ｆを塞ぎ、安全弁が作動してもガスがス
ムーズに抜けずに電池が爆発することがある。図１３
は、封口体の一部が金属ワッシャのガス抜き孔を塞いで
しまった状態を示している。When the safety valve provided in the sealing member 6 operates normally, the gas inside flows out through the metal washers 107 and the gas vent holes 107f and 207f provided in the negative electrode terminal plate 207. When the sealing resin is softened, the sealing resin closes the gas vent hole 107f of the metal washer 107, and even if the safety valve operates, the gas may not expel smoothly and the battery may explode. FIG.
Indicates a state in which a part of the sealing member has closed the gas vent hole of the metal washer.
【０００５】このような問題を防止するために、封口体
の連結部にリブを設けることが提唱されている（例え
ば、特開平７−１２２２４７号公報や特開平１０−３２
１２０１号公報参照）。図１４はリブ６３ｂを設けた樹
脂製封口体６の一例を示すもので、この封口体６におい
ては、ボス部６１と外周部６２とを連結する連結部６３
にリブ６３ｂが設けられている。これによれば、電池の
内圧により連結部６３が変形してもリブ６３ｂのある部
分の段差によってガス抜け経路が確保されることとな
る。In order to prevent such a problem, it has been proposed to provide a rib at the connecting portion of the sealing body (for example, Japanese Patent Application Laid-Open Nos. 7-122247 and 10-32).
No. 1201). FIG. 14 shows an example of a resin sealing body 6 provided with a rib 63b. In this sealing body 6, a connecting portion 63 for connecting a boss portion 61 and an outer peripheral portion 62 is provided.
Is provided with a rib 63b. According to this, even if the connecting portion 63 is deformed due to the internal pressure of the battery, the gas escape path is secured by the step at the portion where the rib 63b exists.
【０００６】[0006]
【発明が解決しようとする課題】ところで、図１１〜図
１３に示した例では、金属ワッシャ１０７が封口体６を
内側から支えているが、この種の金属ワッシャ１０７を
廃して負極端子板２０７だけで封口体６を支える構造に
変えると、封口部分が薄くなり、そのぶん電池活物質を
多く充填できるので、放電容量を向上させることができ
る。In the examples shown in FIGS. 11 to 13, the metal washer 107 supports the sealing body 6 from the inside. However, this kind of metal washer 107 is discarded and the negative electrode terminal plate 207 is removed. By changing the structure to support the sealing body 6 only by itself, the sealing portion becomes thinner and the battery active material can be filled more by that amount, so that the discharge capacity can be improved.
【０００７】しかし、金属ワッシャを廃した場合、電池
応用機器に電力を供給するために凸部が設けられている
負極端子板２０７は、封口時のかしめによって締め付け
る力で径方向に変形を起こす。この負極端子板２０７の
変形に伴い、樹脂製の封口体６も変形する。封口体６に
先に述べたようなリブ６３ｂを設けていると、肉厚のリ
ブ部分はその周囲に比べて変形が少ないので、リブ部分
の周囲に歪みがたまる。この歪みが安全弁部分に影響す
ると、安全弁の動作圧力がばらついてしまう。[0007] However, when the metal washer is discarded, the negative electrode terminal plate 207 provided with a convex portion for supplying power to the battery application device is deformed in the radial direction by a tightening force by caulking at the time of sealing. As the negative electrode terminal plate 207 deforms, the resin sealing body 6 also deforms. When the ribs 63b as described above are provided in the sealing body 6, since the thick rib portion is less deformed than the surrounding portion, distortion is accumulated around the rib portion. When this distortion affects the safety valve portion, the operating pressure of the safety valve varies.
【０００８】アルカリ乾電池の安全弁作動圧は、ある特
定の値を狙って設計されており、その設計値は次のよう
な点を考慮して設定される。すなわち、アルカリ乾電池
の負極活物質である亜鉛は、熱力学平衡論的には電池に
含まれる水を分解して水素ガスを発生させる物質である
が、添加物で水素発生過電圧を上げるなどの工夫でガス
発生速度を低く抑えている。それでも保管条件によって
は年間数mlのオーダーで水素ガスが発生し、電池内圧を
上昇させる。電池の安全弁作動圧が低いと、保管中に安
全弁が作動して漏液により電池を入れている機器を損傷
させてしまうので、この観点からは安全弁作動圧は高い
ほうがよい。一方、電池の爆発事故を防ぐために安全弁
作動圧は鋼板製の外装缶の耐圧より低くする必要があ
り、安全性のマージンを稼ぐ観点からは安全弁作動圧は
低いほうがよい。これらの観点から安全弁の作動圧の目
標値が決められるが、作動圧のばらつきが小さいぼど耐
漏液性や安全性の観点から好ましい。[0008] The safety valve operating pressure of the alkaline dry battery is designed to be a specific value, and the designed value is set in consideration of the following points. In other words, zinc, which is the negative electrode active material of an alkaline dry battery, is a substance that decomposes water contained in the battery to generate hydrogen gas in terms of thermodynamic equilibrium theory. To keep the gas generation rate low. Nevertheless, depending on the storage conditions, hydrogen gas is generated on the order of several ml per year, which raises the internal pressure of the battery. If the operating pressure of the safety valve of the battery is low, the safety valve operates during storage and the device containing the battery is damaged by liquid leakage, so from this viewpoint, the operating pressure of the safety valve is preferably higher. On the other hand, in order to prevent a battery explosion accident, the safety valve operating pressure must be lower than the pressure resistance of the steel plate outer can. From the viewpoint of securing a safety margin, the safety valve operating pressure is preferably lower. From these viewpoints, the target value of the operating pressure of the safety valve is determined, but the variation in the operating pressure is small, which is preferable from the viewpoint of liquid leakage resistance and safety.
【０００９】本発明の目的は、樹脂製封口体を内周から
支える金属板が負極端子を兼ねた鋼板一枚だけであり、
かつ樹脂製封口体の防爆のためのリブを設けたアルカリ
乾電池において、上述した安全弁の作動圧力がばらつく
問題を解消することにある。An object of the present invention is that the metal plate supporting the resin sealing body from the inner periphery is only one steel plate also serving as the negative electrode terminal,
Another object of the present invention is to solve the above-described problem in which the operating pressure of the safety valve varies in an alkaline dry battery provided with a rib for preventing explosion of a resin sealing body.
【００１０】[0010]
【課題を解決するための手段】本発明に係るアルカリ乾
電池においては、図１に示すように、有底円筒状の外装
缶１の内部に、正極２および負極４と、これらの間に配
置されるセパレータ３と、電解液（図示せず）とが収容
されている。外装缶１の開口端部１ａには、例えば図２
に示すように外装缶１を封口する手段として、負極４の
中心部に挿入される負極集電棒５を保持するボス部６１
と、外装缶１の内周面と接する外周部６２と、一部に薄
肉部分６３ａが設けられてボス部６１と外周部６２とを
連結する連結部６３とを具備してなる樹脂製封口体６が
備えられている。この封口体６の連結部６３には、金属
板（負極端子板）７と対向する面側に、電池内部の圧力
の異常上昇時におけるガス抜き経路確保用のリブ６３ｂ
が設けられており、外周部６２が、これを内周から支え
る金属板７と、当該外周部の外側に位置する外装缶１と
で締め付けられてかしめられていることにより、封口体
６が外装缶１の開口端部ａ内の所定位置に装着されて電
池内部の上方側が封口されている。In the alkaline dry battery according to the present invention, as shown in FIG. 1, a positive electrode 2 and a negative electrode 4 are disposed in a cylindrical outer can 1 having a bottom and disposed between them. And an electrolytic solution (not shown). At the open end 1a of the outer can 1, for example, FIG.
As shown in FIG. 7, a boss 61 for holding the negative electrode current collector rod 5 inserted into the center of the negative electrode 4 is used as a means for sealing the outer can 1.
And an outer peripheral portion 62 in contact with the inner peripheral surface of the outer can 1, and a connecting portion 63 having a thin portion 63 a provided partially to connect the boss portion 61 and the outer peripheral portion 62. 6 are provided. The connecting portion 63 of the sealing body 6 has a rib 63b for securing a gas venting path when the pressure inside the battery is abnormally increased, on the surface facing the metal plate (negative electrode terminal plate) 7.
The outer peripheral portion 62 is tightened and caulked by the metal plate 7 supporting the inner peripheral portion of the outer peripheral portion 62 and the outer can 1 located outside the outer peripheral portion. The battery is mounted at a predetermined position in the open end a of the can 1 and the upper side inside the battery is sealed.
【００１１】本発明は、このようなアルカリアルカリ乾
電池において、金属板７を、負極端子を兼ねた鋼板一枚
で構成する。そして、封口体６におけるリブ６３ｂの長
さを連結部６３の長さの２０〜７０％に設定することに
よって、封口体６が変形するときの歪みを小さくし、こ
れによって安全弁の作動ばらつきを小さくする。ここ
で、封口体６におけるリブの長さを連結部６３の長さの
２０〜７０％としたのは、２０％より小さくなると、電
池の爆発を防ぐという目的が達成できず、リブ６３ｂを
設けた意味がないからであり、７０％を超えると安全弁
の作動圧にばらつきが生じるからである。７０％を超え
たときに安全弁の作動圧にばらつきが生じる点は、本発
明者らが行った実験を通じて初めて明らかとなったもの
である（後述する本発明の実施例参照）。また、同じ実
験において、連結部６３の長さに対してリブ６３ｂの長
さを５０％以下としたときの方が７０％としたときより
安全弁作動圧のばらつきが小さくなることも確認されて
いる。したがって、リブ６３ｂの長さは連結部６３の長
さの５０％以下とするのが好ましい。According to the present invention, in such an alkaline alkaline battery, the metal plate 7 is constituted by a single steel plate also serving as a negative electrode terminal. By setting the length of the rib 63b in the sealing member 6 to 20 to 70% of the length of the connecting portion 63, distortion when the sealing member 6 is deformed is reduced, and thereby, the operation variation of the safety valve is reduced. I do. Here, the reason why the length of the rib in the sealing body 6 is set to 20 to 70% of the length of the connecting portion 63 is that if it is smaller than 20%, the purpose of preventing the explosion of the battery cannot be achieved, and the rib 63b is provided. The reason is that if it exceeds 70%, the operating pressure of the safety valve varies. The fact that the operating pressure of the safety valve fluctuates when it exceeds 70% has been clarified for the first time through experiments conducted by the present inventors (see examples of the present invention described later). In the same experiment, it has been confirmed that the variation in the operating pressure of the safety valve is smaller when the length of the rib 63b is 50% or less than the length of the connecting portion 63 than when the length is 70%. . Therefore, it is preferable that the length of the rib 63b be 50% or less of the length of the connecting portion 63.
【００１２】[0012]
【発明の実施の形態】本発明は、例えば図１に示したよ
うな単三形アルカリ乾電池として実施される。このアル
カリ乾電池は、正極端子を兼ねる有底円筒状の外装缶１
と、この外装缶１内に収容された円筒状の正極２と、こ
の正極２の中空部内に配置されたコップ状の不織布から
なるセパレータ３と、このセパレータ３内に充填された
ペースト状の負極４と、この負極４の中心部に挿入され
た釘状の負極集電棒５と、セパレータ３および正極２に
含浸された水酸化カリウム水溶液を主成分とする電解液
（図示せず）とを有し、外装缶の開口端部１ａ側を封口
した構成である。図１において、符号１ｂは外装缶１の
底部に形成された凸状の正極端子部分を示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is embodied, for example, as an AA alkaline battery as shown in FIG. This alkaline dry battery has a cylindrical outer can 1 having a bottom and also serving as a positive electrode terminal.
And a cylindrical positive electrode 2 housed in the outer can 1, a separator 3 made of a cup-shaped nonwoven fabric disposed in a hollow portion of the positive electrode 2, and a paste-like negative electrode filled in the separator 3. 4, a nail-shaped negative electrode current collector rod 5 inserted into the center of the negative electrode 4, and an electrolytic solution (not shown) mainly containing a potassium hydroxide aqueous solution impregnated in the separator 3 and the positive electrode 2. The outer can is configured so that the opening end 1a side is sealed. In FIG. 1, reference numeral 1b denotes a convex positive electrode terminal portion formed on the bottom of the outer can 1.
【００１３】このアルカリ乾電池における封口部分に
は、図２に拡大して示すように、防爆用の安全弁機構を
有する例えばポリアミドやポリプロピレン等からなる封
口体（樹脂製封口体）６と、これを内周から支える手段
としての、負極端子を兼ねた鋼製の金属板（以下、負極
端子板ともいう）７と、外装缶１の開口端部１ａと金属
板７との間を電気的に絶縁する鍔付き短筒状の樹脂体か
らなる絶縁板８とが装着されている。As shown in an enlarged view in FIG. 2, a sealing member (resin sealing member) made of, for example, polyamide or polypropylene having an explosion-proof safety valve mechanism is provided in the sealing portion of the alkaline dry battery. A steel metal plate 7 also serving as a negative electrode terminal (hereinafter, also referred to as a negative electrode terminal plate) as a means for supporting from the periphery, and the opening end 1a of the outer can 1 and the metal plate 7 are electrically insulated. An insulating plate 8 made of a short cylindrical resin body with a flange is mounted.
【００１４】このうち、樹脂製封口体６は、孔６１ａに
挿通された負極集電棒５を保持するボス部６１と、外装
缶１の内周面と接する外周部６２と、一部に安全弁を構
成する薄肉部分（安全弁）６３ａが設けられてボス部６
１と外周部６２とを連結し且つボス部６１から外周部６
２に至る面を封鎖する連結部６３とで構成されている。
そして、この封口体６によって、電池活物質の収容され
ているセル室Ｃの上方を閉じてセル室Ｃ内の電解液の外
部への漏出を防止するとともに、電池内部でのガス発生
により内圧（セル室Ｃ内の圧力）が所定レベル以上に上
昇したときに連結部６３が図中の上方側に膨張変形し、
さらに内圧が上昇したときに連結部６３の薄肉部分６３
ａが破断することにより、セル室Ｃ内で発生したガスを
外部に放出するようになっている。The resin sealing body 6 includes a boss portion 61 for holding the negative electrode current collector rod 5 inserted through the hole 61a, an outer peripheral portion 62 in contact with the inner peripheral surface of the outer can 1, and a safety valve partially provided. The thin portion (safety valve) 63a constituting the boss portion 6 is provided.
1 and the outer peripheral portion 62 and the boss portion 61 to the outer peripheral portion 6.
2 and a connecting portion 63 for blocking the surface leading to 2.
The sealing member 6 closes the upper part of the cell chamber C containing the battery active material to prevent the electrolyte solution in the cell chamber C from leaking to the outside, and generates an internal pressure ( When the pressure in the cell chamber C rises above a predetermined level, the connecting portion 63 expands and deforms upward in the figure,
When the internal pressure further rises, the thin portion 63 of the connecting portion 63
When a is broken, the gas generated in the cell chamber C is released to the outside.
【００１５】このときの安全弁としての動作を確実にす
る目的で、封口体６の連結部６３には、図２ないし図４
に示すように、先に述べた金属板７と対向する側の面、
つまりセル室Ｃとは反対側の面に、複数（図示例では６
個）のリブ６３ｂが相互に一定間隔をあけて放射状に設
けられている。これらのリブ６３ｂは、ボス部６１側の
一端部が薄肉部分６３ａ上またはこれの近傍に配置され
ており、先に述べた内圧の異常上昇に伴う薄肉部分６３
ａの破断時にリブ６３ｂが金属板７の裏面（図２およひ
図４に示した状態で下面）側に当接して、リブ６３ｂの
ある部分と無い部分との段差により金属板７の裏面と連
結部６３の間に隙間を生じさせ、これによって金属板７
に設けられているガス抜き孔７ｆ（図５および図６参
照）が封口体６の連結部６３で塞がれることを防止し
て、電池内部で発生したガスがガス抜き孔７ｆを通って
外部に確実に放出されるようになっている。In order to ensure the operation as a safety valve at this time, the connecting portion 63 of the sealing body 6 is connected to the connecting portion 63 shown in FIGS.
As shown in the figure, the surface on the side facing the metal plate 7 described above,
That is, a plurality (6 in the illustrated example) is provided on the surface opposite to the cell chamber C.
) Ribs 63b are provided radially at a constant interval from each other. These ribs 63b have one end on the boss portion 61 side disposed on or near the thin portion 63a, and have the thin portion 63 associated with the abnormal increase in the internal pressure described above.
The rib 63b abuts against the rear surface (the lower surface in the state shown in FIGS. 2 and 4) of the metal plate 7 at the time of breaking of a, and the rear surface of the metal plate 7 And a gap is formed between the metal plate 7 and the connecting portion 63.
The gas vent hole 7f (see FIGS. 5 and 6) provided in the battery is prevented from being blocked by the connecting portion 63 of the sealing body 6, and gas generated inside the battery passes through the gas vent hole 7f to the outside. Is reliably released.
【００１６】ところが、かしめ時の金属板７の変形に伴
う封口体６の変形によって、肉厚のあるリブ６３ｂの周
囲に歪みがたまっていると、薄肉部分６３ａの破断が破
断して安全弁として動作するときの電池内部圧力、すな
わち安全弁の作動圧力がばらついてしまい、耐漏液性や
安全性の点で好ましくない事態が生じる。そこで、本発
明で使用する樹脂製封口体においては、図４に示したよ
うに、各リブ６３ｂの長さＬ1 が連結部６３の長さ（半
径方向の長さ）Ｌ2 の２０〜７０％（図示例では５０
％）に設定されており、これによって安全弁の作動圧力
がばらつくのを抑制するようになっている。However, if deformation of the sealing body 6 due to deformation of the metal plate 7 at the time of caulking causes distortion to accumulate around the thick rib 63b, the breakage of the thin portion 63a is broken and the valve operates as a safety valve. In this case, the internal pressure of the battery, that is, the operating pressure of the safety valve varies, which causes an undesirable situation in terms of liquid leakage resistance and safety. Therefore, in the resin sealing body used in the present invention, as shown in FIG. 4, the length L 1 is the length of the connecting portion 63 of each rib 63 b (radial length) 20 to 70 of the L 2 % (50 in the example shown)
%), Which suppresses variation in the operating pressure of the safety valve.
【００１７】一方、負極端子を兼ねた金属板７は一枚の
鋼板で構成されており、負極端子面となる中央側の部分
（以下、端子面部分という）７ａが金属板７の裏面側か
ら表面側へ向かう方向に膨出した凸状に形成されてい
る。金属板７の端子面部分７ａには、僅かに凹んだ平面
視で円形の凹み７ｂが形成されており、この凹み７ｂが
取り囲んでいる中央部分の裏面側に負極集電棒５の大径
端部５ａがスポット溶接等により接合されている。ま
た、図５および６に示すように、金属板７には、先に述
べたガス抜き孔７ｆが設けられている。これらのガス抜
き孔７ｆは、図示例では、金属板７の中心からみて外方
に９０度間隔ごとに全部で４個配置されており、それぞ
れが端子面部分７ａの側面７ｄからその外周側の鍔面部
分７ｅの一部に至るように形成されている。On the other hand, the metal plate 7 also serving as the negative electrode terminal is formed of a single steel plate, and a central portion (hereinafter, referred to as a terminal surface portion) 7a serving as the negative electrode terminal surface is formed from the back side of the metal plate 7. It is formed in a convex shape swelling in the direction toward the surface side. The terminal surface portion 7a of the metal plate 7 is formed with a slightly concave circular recess 7b in plan view, and a large-diameter end portion of the negative electrode current collector rod 5 on the back surface side of the central portion surrounded by the recess 7b. 5a is joined by spot welding or the like. Further, as shown in FIGS. 5 and 6, the metal plate 7 is provided with the gas vent hole 7f described above. In the illustrated example, a total of four of these gas vent holes 7f are arranged outward at intervals of 90 degrees when viewed from the center of the metal plate 7, and each of the gas vent holes 7f extends from the side surface 7d of the terminal surface portion 7a to the outer peripheral side thereof. It is formed so as to reach a part of the flange surface portion 7e.
【００１８】また、図示例の金属板７の外周部（鍔面部
分７ｅ）には、封口体６をかしめる際にこれの外周部６
２を内周からしっかりと支える目的で、その全周にわた
って湾曲部分７ｃが設けられている。この湾曲部分７ｃ
は、金属板７をこれの中心を通って厚み方向に切断した
ときの断面において、平均曲率半径が１mm以下で、かつ
９０度より大きい角度範囲にわたってほぼＣ字状または
弧状に湾曲形成されており、しかもその外周側が９０度
より大きい角度範囲にわたって封口体６の外周部６２の
内周側と接触している。そして、この接触部分において
封口体６の外周部６２が、これの内周側に位置する金属
板７の湾曲部分７ｃと、外周側に位置する外装缶１の開
口端部１ａとでかしめられて締め付けられていることに
より、図１および図２に示したように封口体６が外装缶
１の開口端部１ａ内の所定位置に装着され、この状態で
セル室Ｃ内の上方が封口されるとともに、封口体６の連
結部６３と金属板７との間に安全弁（薄肉部分）の動作
を確保するための所要の空間が形成された構造となって
いる。The outer peripheral portion (flange surface portion 7e) of the metal plate 7 shown in FIG.
A curved portion 7c is provided over the entire circumference for the purpose of firmly supporting 2 from the inner circumference. This curved portion 7c
Has a mean radius of curvature of 1 mm or less in a cross section when the metal plate 7 is cut in the thickness direction through the center of the metal plate 7 and is formed in a substantially C-shape or arc shape over an angle range larger than 90 degrees. In addition, the outer peripheral side is in contact with the inner peripheral side of the outer peripheral portion 62 of the sealing body 6 over an angle range larger than 90 degrees. In this contact portion, the outer peripheral portion 62 of the sealing body 6 is swaged by the curved portion 7c of the metal plate 7 located on the inner peripheral side thereof and the open end 1a of the outer can 1 located on the outer peripheral side thereof. Due to the tightening, the sealing body 6 is mounted at a predetermined position in the open end 1a of the outer can 1, as shown in FIGS. 1 and 2, and the upper part of the cell chamber C is sealed in this state. At the same time, a required space for ensuring the operation of the safety valve (thin portion) is formed between the connecting portion 63 of the sealing body 6 and the metal plate 7.
【００１９】ここで、上記の湾曲部分７ｃの平均曲率半
径や湾曲部分７ｃが設けられている角度範囲とは、金属
板７の他の例を示す図７に記載したように、湾曲部分７
ｃを、上記の平均曲率半径ｒを半径として有する仮想的
な円で近似したときに、この円の中心Ｏを基準として湾
曲部分７ｃの両端がなす角度θ1 を意味する。また、湾
曲部分７ｃと封口体６とが接触している部分の角度範囲
も同様に、湾曲部分７ｃを、上記の平均曲率半径ｒを半
径として有する仮想的な円で近似したときに、この円の
中心Ｏを基準として、封口体６と接触している湾曲部分
７ｃの当該接触部分の両端がなす角度θ2 を意味する。
これらの場合において、湾曲部分７ｃを近似する円と
は、湾曲部分断面の外周を縁取る曲線に対し、曲線上の
各点からの最短距離の合計が最小になるような円のこと
を指す。Here, the average radius of curvature of the curved portion 7c and the angle range in which the curved portion 7c is provided are defined by the curved portion 7c as shown in FIG.
The c, when approximated by imaginary circle having an average radius of curvature r of the as radius, meaning the angle theta 1 formed by the ends of the curved portion 7c of the center O of the circle as a reference. Similarly, when the curved portion 7c and the sealing body 6 are in contact with each other, the angle range of the curved portion 7c is approximated by a virtual circle having the above-mentioned average radius of curvature r as a radius. respect to the center O of the means the angle theta 2 formed by the both ends of the contact portion of the curved portion 7c in contact with the sealing member 6.
In these cases, the circle approximating the curved portion 7c refers to a circle that minimizes the sum of the shortest distances from each point on the curve with respect to the curve bordering the outer circumference of the curved portion cross section.
【００２０】さらに、鍔付き短筒状の樹脂体からなる絶
縁板８は、封口体６および金属板７が外装缶１の開口端
部１ａに装着された後に、金属板７の端子面部分７ａと
外装缶１の開口端および封口体６の外周部６２の一端と
の間に形成された隙間部分に短筒部分８ａが嵌着され
て、金属板７と外装缶１との間を電気的に絶縁してい
る。Further, after the sealing body 6 and the metal plate 7 are attached to the opening end 1a of the outer can 1, the insulating plate 8 made of a short cylindrical resin body with a flange is attached to the terminal surface portion 7a of the metal plate 7. A short cylindrical portion 8a is fitted into a gap formed between the metal plate 7 and the outer can 1 so as to electrically connect the metal plate 7 and the outer can 1 to each other. Insulated.
【００２１】なお、金属板７の外周部に設ける湾曲部分
７ｃは、先に述べた平均曲率半径ｒと角度範囲θ1 ・θ
2 の条件を満たしてさえいれば、その曲げ方や曲げ方向
は問わない。例えば、図７に示すように湾曲部分７ｃは
金属板７の端子面部分７ａと同じ方向もしくは同じ側に
凸となるように形成されていてもよいし、図８に示すよ
うに湾曲部分７ｃは金属板７の半径方向の外方に向けて
凸となるように形成されていてもよい。あるいは図９に
示すように湾曲部分７ｃは、金属板７の外周部を端子面
部分７ａの突出方向とは反対側の方向にいったん曲げら
れてから、そこからさらに逆向きに湾曲されて外周側が
封口体６の外周部６２と所定状態で接するように形成さ
れていてもよい。また、金属板７には、例えば電池を落
としたときや端子面部分７ａを外部から強く押したとき
にも簡単にはへこまないようにしたり、封口体６のかし
め時に金属板全体が変形しないようにしたりする目的
で、中央部に設けた凹み７ｂと同じような凹凸を同心円
状に設けてもよいことは勿論である。The curved portion 7c provided on the outer peripheral portion of the metal plate 7 has the above-described average radius of curvature r and the angle range θ 1 · θ.
The bending method and bending direction are not limited as long as the condition 2 is satisfied. For example, as shown in FIG. 7, the curved portion 7c may be formed so as to be convex in the same direction or on the same side as the terminal surface portion 7a of the metal plate 7, or as shown in FIG. The metal plate 7 may be formed so as to be convex outward in the radial direction. Alternatively, as shown in FIG. 9, the curved portion 7c is formed by bending the outer peripheral portion of the metal plate 7 once in a direction opposite to the direction in which the terminal surface portion 7a protrudes, and then further bending in the opposite direction from the outer peripheral side. It may be formed so as to be in contact with the outer peripheral portion 62 of the sealing body 6 in a predetermined state. Further, the metal plate 7 is designed not to be easily dented even when the battery is dropped or the terminal surface portion 7a is strongly pressed from the outside, or the entire metal plate is not deformed when the sealing body 6 is swaged. It is a matter of course that concavities and convexities similar to the concave portion 7b provided in the central portion may be provided in a concentric manner for the purpose of doing so.
【００２２】以上のアルカリ乾電池においては、封口体
６の連結部６３にリブ６３ｂが設けられているので、電
池内圧の異常上昇に伴って連結部６３が変形してその薄
肉部分６３ａが破断したときに、リブ６３ｂが金属板７
の裏面側に当接して、リブ６３ｂのある部分と無い部分
との段差により金属板７の裏面と連結部６との間に隙間
ができる。その結果、金属板７のガス抜き孔７ｆが封口
体６の連結部６３によって塞がれることがなく、電池内
部で発生したガスが外部に確実に放出される。その場
合、かしめ時の封口体６の変形に伴って肉厚のあるリブ
６３ｂの周囲に歪みがたまっていると、薄肉部分がちぎ
れて安全弁として作動するときの電池内部圧力、つまり
安全弁の作動圧力がばらつくおそれがあるが、本発明の
アルカリ乾電池によれば、封口体６の連結部６３に設け
たリブ６３ｂの長さＬ1 が連結部６３の長さＬ2 の２０
〜７０％（図示例では約５０％）に設定されているの
で、そのような作動圧力のばらつきを抑えることができ
る。In the above-mentioned alkaline dry battery, since the connecting portion 63 of the sealing body 6 is provided with the rib 63b, the connecting portion 63 is deformed due to an abnormal increase in the internal pressure of the battery and the thin portion 63a is broken. And the rib 63b is
A gap between the back surface of the metal plate 7 and the connecting portion 6 due to the step between the portion with the rib 63b and the portion without the rib 63b. As a result, the gas vent hole 7f of the metal plate 7 is not closed by the connecting portion 63 of the sealing body 6, and the gas generated inside the battery is reliably discharged to the outside. In this case, if distortion is accumulated around the thick rib 63b due to deformation of the sealing body 6 at the time of caulking, the internal pressure of the battery when the thin portion is torn off and operates as a safety valve, that is, the operating pressure of the safety valve According to the alkaline dry battery of the present invention, the length L 1 of the rib 63 b provided on the connecting portion 63 of the sealing body 6 is 20 times the length L 2 of the connecting portion 63.
Since it is set to about 70% (about 50% in the illustrated example), it is possible to suppress such a variation in the operating pressure.
【００２３】また、封口体の外周部を内周から支える手
段として従来から用いられている金属ワッシャを廃止
し、その代わりに、図５ないし図９に示したような負極
端子板でもある金属板７を使用して、この金属板７と外
装缶１との間に封口体６の外周部６２を挟んでかしめれ
ば、金属板７の裏面側にできる空間部分を、封口体６の
連結部６３を変形を許すための空間として利用でき、し
かも金属ワッシャを設けないので、この金属ワッシャの
厚みぶんと、従来はこれと封口体との間に確保しておく
必要があった隙間ぶんだけ、封口部分の厚みを減らすこ
とができる。その結果、電池の内容積（セル室Ｃの容
積）を大きくすることが可能となる。図１、２に示した
例でいうと、図１の構造では封口部分が電池の高さに対
し１０％以上の厚みを持つのに対し、図２の構造では封
口部分の厚みは電池高さの８％に抑えられ、その結果、
電池内容積が４％増加した。この増加体積に電池活物質
を充填すれば電池の容量は４％増加するし、空隙のまま
残しても、電池内部でガスが発生したときの圧力上昇緩
和のアブソーバーとして機能するので安全上有効に活用
される。Further, the metal washer conventionally used as a means for supporting the outer peripheral portion of the sealing member from the inner periphery is eliminated, and instead, a metal plate which is also a negative electrode terminal plate as shown in FIGS. When the outer peripheral portion 62 of the sealing body 6 is sandwiched between the metal plate 7 and the outer can 1 using the metal plate 7 and caulked, a space formed on the back side of the metal plate 7 is connected to the connecting portion of the sealing body 6. 63 can be used as a space to allow deformation, and since there is no metal washer, only the thickness of this metal washer and the gap which had to be previously secured between this and the sealing body, The thickness of the sealing portion can be reduced. As a result, the internal volume of the battery (the volume of the cell chamber C) can be increased. In the example shown in FIGS. 1 and 2, the sealing portion has a thickness of 10% or more of the height of the battery in the structure of FIG. 1, whereas the thickness of the sealing portion in the structure of FIG. Of 8%, and as a result,
The battery internal volume increased by 4%. If the increased volume is filled with a battery active material, the capacity of the battery is increased by 4%, and even if it is left as a void, it functions as an absorber for reducing the pressure rise when gas is generated inside the battery, so that it is effective for safety. Be utilized.
【００２４】ただし、金属ワッシャを廃止して、その代
わりに負極端子板でもある金属板を使用しただけでは、
電池に激しい温度変化を加えたときなどに外装缶と封口
体との間を経由して内部の強アルカリ電解液が漏れ出る
おそれがある。封口体６の外周部６２を内側から支える
手段としての金属板７が薄くなったことで、かしめる時
に金属板７が変形してしまい、封口体６を押さえつける
力が充分でなくなるからである。However, if the metal washer is eliminated and a metal plate that is also a negative electrode terminal plate is used instead,
When a severe temperature change is applied to the battery or the like, the strong alkaline electrolyte inside may leak out through the space between the outer can and the sealing body. This is because the metal plate 7 serving as a means for supporting the outer peripheral portion 62 of the sealing body 6 from the inside becomes thin, so that the metal plate 7 is deformed when swaging, and the force for pressing the sealing body 6 becomes insufficient.
【００２５】このような変形は、先に述べた金属板７の
ように、これの外周部に平均曲率半径が１mm以下のほぼ
Ｃ字状または孤状の断面形状を有する湾曲部分７ｃを設
け、この湾曲部分７ｃを封口体６と所定の角度範囲にわ
たって接触させることによって防止できる。この湾曲部
分７ｃの形成に伴う加工硬化によって金属板７が変形し
にくくなるのみならず、外装缶１を介して封口体６に加
えられる押しつけ力が金属板７の外周部に作用しても、
封口体６と比較的広い角度範囲にわたって接触する湾曲
部分７ｃを介して金属板全体で封口体６がしっかりとバ
ックアップされるからである。したがって、外装缶１の
開口端部１ａの周縁部分を内側に曲げて金属板７との間
で封口体６を強い力で締め付けることができ、その結
果、外装缶１と封口体６との間の密着性、つまりは耐漏
液性（液密性）を高めることができる。しかも、金属板
７の湾曲部分７ｃは、封口体６がかしめられた状態で封
口体６と９０度よりも大きい角度範囲にわたって接触し
ていることで、封口体６と外装缶１との接触面積も比較
的大きくなるから、これによっても封口体６と外装缶１
との境界部分に充分な耐漏液性を付与することができ
る。Such a deformation is achieved by providing a curved portion 7c having a substantially C-shaped or arc-shaped cross-sectional shape having an average radius of curvature of 1 mm or less, as in the above-described metal plate 7, This can be prevented by bringing the curved portion 7c into contact with the sealing body 6 over a predetermined angle range. Not only is the metal plate 7 hardly deformed by the work hardening accompanying the formation of the curved portion 7c, but also the pressing force applied to the sealing body 6 via the outer can 1 acts on the outer peripheral portion of the metal plate 7,
This is because the sealing body 6 is firmly backed up by the entire metal plate via the curved portion 7c that contacts the sealing body 6 over a relatively wide angle range. Therefore, the peripheral portion of the open end 1a of the outer can 1 can be bent inward to tighten the sealing body 6 between the outer can 1 and the sealing body 6 with a strong force. , That is, leakage resistance (liquid tightness) can be improved. Moreover, since the curved portion 7c of the metal plate 7 is in contact with the sealing body 6 over an angle range larger than 90 degrees in a state where the sealing body 6 is crimped, the contact area between the sealing body 6 and the outer can 1 is increased. Is relatively large, so that the sealing body 6 and the outer can 1
And sufficient leakage resistance can be imparted to the boundary portion.
【００２６】[0026]
【実施例】以下において本発明の実施例を説明するが、
もちろん本発明はこれらの実施例に限定されるものでは
ない。なお、以下でいう％は、特に断らない限り全て重
量％パーセントを意味する。EXAMPLES Examples of the present invention will be described below.
Of course, the present invention is not limited to these examples. In addition,% mentioned below means weight% all unless otherwise indicated.
【００２７】＜実施例１〜３および比較例１〜３＞電解
法による二酸化マンガンと黒鉛と水とを９２：５：３
（重量比）で混合した正極材料１1.０ｇを、内径9.１m
m、外径１3.３mm、高さ４3.０mmの円筒状に加圧成形し
た正極を単３形アルカリ乾電池用の外装缶に挿入した。
次に、外装缶の開口端から高さ方向において3.７mmの位
置にグルーブを施した。これは、後で封口体を挿入する
ときに封口体がグルーブの位置で支えられ、グルーブ位
置より奥に押し込まれないようにするためである。さら
に外装缶の内側、開口端から高さ方向において3.７mmま
での部分に外装缶と封口体との密着性を良くすることを
目的としてピッチを塗布した。<Examples 1 to 3 and Comparative Examples 1 to 3> Manganese dioxide, graphite and water prepared by electrolysis were mixed in a ratio of 92: 5: 3.
(Weight ratio) of 11.0 g of the positive electrode material was mixed with an inner diameter of 9.1 m.
The positive electrode formed into a cylindrical shape having a diameter of 13.3 mm, an outer diameter of 13.3 mm and a height of 43.0 mm was inserted into an outer can for an AA alkaline battery.
Next, a groove was formed at a position 3.7 mm in the height direction from the opening end of the outer can. This is to prevent the sealing member from being supported at the position of the groove when the sealing member is later inserted, so that the sealing member is not pushed deeper than the groove position. Further, a pitch was applied to the inner side of the outer can and to a portion up to 3.7 mm from the opening end in the height direction in order to improve the adhesion between the outer can and the sealing body.
【００２８】次に、厚み１００μｍのビニロンとレーヨ
ンからなる不織布を三重に重ねてコップ状に巻いたセパ
レータを先の円筒状正極の内側に装填し、これらに電解
液として濃度３９％の水酸化カリウム水溶液1.５ｇをし
みこませた。次いで、純度９9.０％、粒径７５〜４２５
μｍの粉末亜鉛4.０ｇと濃度３９％の水酸化カリウム水
溶液2.０ｇとポリアクリル酸ソーダ0.０４ｇとを混練し
てなるペースト状の負極をセパレータの内部に充填し
た。Next, a non-woven fabric made of vinylon and rayon having a thickness of 100 μm is stacked three times and wound in a cup shape, and the separator is loaded inside the above-mentioned cylindrical positive electrode. 1.5 g of the aqueous solution was impregnated. Then, the purity is 99.0% and the particle size is 75 to 425.
A paste-like negative electrode obtained by kneading 4.0 g of powdered zinc powder of 4.0 μm, 2.0 g of a 39% aqueous potassium hydroxide solution, and 0.04 g of sodium polyacrylate was filled in the interior of the separator.
【００２９】次に、負極の集電を取るためのすずめっき
真鍮製の負極集電棒を封口体のボス部の孔に挿通して装
着し、負極集電棒と負極端子板（金属板）とをスポット
溶接により接合した。これらの負極端子板は、厚さ0.４
mmのニッケルめっき鋼鈑を、打ち抜き・プレス加工する
ことで作成した。この負極端子板をナイロン６−６製の
封口体に装着し、これらを、先の正極および負極を充填
した外装缶に装着した後、外装缶の開口端部の外側から
スピニング方式によりかしめることにより、図１に示し
たような単３形アルカリ乾電池を作成した。封口体にリ
ブを設ける場合は６個設けた。封口体の連結部に設けた
リブの長さが表１に掲げた６種類であること以外は同一
の電池を各々１５０個、作成した。図３および図４はリ
ブの長さが連結部の長さに対して５０％である実施例の
封口体である。Next, a negative electrode current collector rod made of tin-plated brass for collecting the current of the negative electrode is inserted into the hole of the boss portion of the sealing body and attached, and the negative electrode current collector rod and the negative electrode terminal plate (metal plate) are attached. They were joined by spot welding. These negative terminal plates have a thickness of 0.4
It was prepared by punching and pressing a nickel-plated steel sheet of mm. This negative electrode terminal plate is mounted on a nylon 6-6 sealing body, and these are mounted on the outer can filled with the positive electrode and the negative electrode, and then caulked by spinning from outside the open end of the outer can. Thus, an AA alkaline battery as shown in FIG. 1 was prepared. Six ribs were provided when the sealing member was provided with ribs. Except that the lengths of the ribs provided at the connecting portion of the sealing body were six types shown in Table 1, 150 identical batteries were prepared. FIGS. 3 and 4 show a sealing body according to an embodiment in which the length of the rib is 50% of the length of the connecting portion.
【００３０】なお、実施例１〜３および比較例１〜３で
は、いずれも負極端子板にめっき鋼鈑を用いたが、これ
は加工が容易で耐食性が良いうえに廉価な材料であるた
めである。国内で販売されているアルカリ乾電池は、す
べてこの種のめっき鋼鈑を使用している。また、この鋼
鈑の厚みを0.４mmとしたのは、鋼鈑の厚みが0.５mm以上
であれば原板から負極端子板を打ち抜く際に金型の摩耗
が激しくコスト面で不利となるからである。In Examples 1 to 3 and Comparative Examples 1 to 3, a plated steel plate was used for the negative electrode terminal plate, because it is a material which is easy to process, has good corrosion resistance and is inexpensive. is there. Alkaline batteries sold in Japan all use this type of plated steel sheet. The reason why the thickness of the steel sheet is 0.4 mm is that if the thickness of the steel sheet is 0.5 mm or more, the die is severely worn when the negative electrode terminal plate is punched from the original plate, which is disadvantageous in cost. It is.
【００３１】〔安全弁の作動試験〕以上のようにして作
成した電池、各々５０個は１Ａで充填して、安全弁が正
しく動作して爆発を起こさないかどうかを調べた。[Operation Test of Safety Valve] Fifty batteries prepared as described above were filled with 1A each, and it was examined whether the safety valve operated properly and did not cause an explosion.
【００３２】作成した電池の残り、各々１００個の封口
体の安全弁作動圧を測定するために、図１０に示すよう
に電池の正極端子部分（外装缶１の底面に形成した凸状
部分）に孔ｈをあけ、この孔ｈから電池内に高圧の圧縮
空気を送りこんで封口体６における安全弁が作動する圧
力を測定した。図１０において符号Ｐは圧力計、符号Ｖ
は圧力調整バルブである。結果を表１に示す。In order to measure the operating pressure of the safety valve of each of the 100 remaining sealing bodies of the produced battery, as shown in FIG. 10, the positive electrode terminal portion of the battery (the convex portion formed on the bottom surface of the outer can 1) was used. A hole h was made, and high-pressure compressed air was sent into the battery from the hole h to measure the pressure at which the safety valve in the sealing body 6 was operated. In FIG. 10, the symbol P is a pressure gauge, and the symbol V
Is a pressure regulating valve. Table 1 shows the results.
【００３３】[0033]
【表１】 [Table 1]
【００３４】この表を見ればわかるように、封口体にお
ける連結部の長さに対するリブの長さが８０％以上であ
る時は安全弁作動圧に1.７ＭＰａ以上のばらつきが生じ
たが、７０％以下の時はばらつきは0.８ＭＰａ以下に抑
制することができた。また、連結部長さに対するリブの
長さが５０％以下の時のほうが、７０％の時よりばらつ
きが小さいので、より望ましい。一方、２０％より小さ
くなると、リブを設けた目的、すなわち電池の爆発を防
ぐという目的が達成できないので、意味がない。As can be seen from this table, when the length of the rib is 80% or more of the length of the connecting portion in the sealing member, the operating pressure of the safety valve fluctuates by 1.7 MPa or more, but 70%. In the following cases, the variation could be suppressed to 0.8 MPa or less. Further, when the length of the rib is 50% or less with respect to the length of the connecting portion, the variation is smaller than when the length is 70%, so that it is more preferable. On the other hand, if the ratio is less than 20%, the purpose of providing the ribs, that is, the purpose of preventing the explosion of the battery cannot be achieved, so that it is meaningless.
【００３５】[0035]
【発明の効果】以上のように、本発明によれば、封口部
分に樹脂製封口体を装着したアルカリ乾電池において、
樹脂製封口体の連結部に設けたリブの長さを連結部の長
さの２０〜７０％に設定したことにより、電池内部の圧
力の異常上昇時に連結部の薄肉部分が破断して安全弁と
しての機能を果たす際の圧力、すなわち安全弁の作動圧
力のばらつきを抑えることができる。これにより、耐漏
液性や安全性の面で好ましいアルカリ乾電池が得られ
る。As described above, according to the present invention, in an alkaline dry battery having a resin sealing body attached to the sealing portion,
By setting the length of the rib provided at the connecting portion of the resin sealing body to 20 to 70% of the length of the connecting portion, the thin portion of the connecting portion is broken when the pressure inside the battery rises abnormally, so that it can be used as a safety valve. , Ie, the variation in the operating pressure of the safety valve can be suppressed. Thereby, an alkaline dry battery that is preferable in terms of liquid leakage resistance and safety can be obtained.
【図１】本発明を適用したアルカリ乾電池（単三形アル
カリ乾電池）の全体構造を示す断面図である。FIG. 1 is a cross-sectional view showing the overall structure of an alkaline battery (AA alkaline battery) to which the present invention is applied.
【図２】図１のアルカリ乾電池の封口部分を拡大して示
す部分拡大図である。FIG. 2 is a partially enlarged view showing a sealed portion of the alkaline dry battery of FIG. 1 in an enlarged manner.
【図３】本発明の実施例で用いた樹脂製封口体の平面図
である。FIG. 3 is a plan view of a resin sealing body used in an example of the present invention.
【図４】図３のＸ−Ｘ線で切断した樹脂製封口体の断面
図である。FIG. 4 is a cross-sectional view of the resin sealing body taken along line XX of FIG.
【図５】本発明で用いられる金属板の一例を示す平面図
である。FIG. 5 is a plan view showing an example of a metal plate used in the present invention.
【図６】図５に示した金属板の縦断面図である。6 is a vertical sectional view of the metal plate shown in FIG.
【図７】本発明で用いられる金属板の別の例を示すもの
で、金属板の周辺部分の構造を一部省略および簡略化し
て示す断面図である。FIG. 7 is a cross-sectional view showing another example of the metal plate used in the present invention, in which a structure of a peripheral portion of the metal plate is partially omitted and simplified.
【図８】本発明で用いられる金属板のさらに別の例を示
すもので、金属板の周辺部分の構造を一部省略および簡
略化して示す断面図である。FIG. 8 is a cross-sectional view showing yet another example of a metal plate used in the present invention, in which a structure of a peripheral portion of the metal plate is partially omitted and simplified.
【図９】本発明で用いられる金属板のさらに別の例を示
すもので、金属板の周辺部分の構造を一部省略および簡
略化して示す断面図である。FIG. 9 is a cross-sectional view showing yet another example of a metal plate used in the present invention, in which a structure of a peripheral portion of the metal plate is partially omitted and simplified.
【図１０】本発明の実施例において安全弁の作動圧力の
測定方法を説明するために用いた説明図である。FIG. 10 is an explanatory diagram used to explain a method of measuring the operating pressure of the safety valve in the embodiment of the present invention.
【図１１】従来のアルカリ乾電池（単三形アルカリ乾電
池）の一例を示す断面図である。FIG. 11 is a cross-sectional view showing an example of a conventional alkaline dry battery (AA alkaline battery).
【図１２】図１２のアルカリ乾電池における封口部分を
拡大して示す部分拡大図である。FIG. 12 is a partially enlarged view showing a sealed portion of the alkaline dry battery of FIG. 12 in an enlarged manner.
【図１３】従来のアルカリ乾電池（単三形アルカリ乾電
池）において封口体の連結部が金属板（金属ワッシャ）
のガス抜き孔を塞いだ状態を示す模式図である。FIG. 13 shows a conventional alkaline dry battery (AA alkaline battery) in which the connecting portion of the sealing body is a metal plate (metal washer).
FIG. 4 is a schematic view showing a state in which a gas vent hole is closed.
【図１４】リブが設けられている封口体の一例を示す断
面図である。FIG. 14 is a cross-sectional view illustrating an example of a sealing body provided with ribs.
１ 外装缶 １ａ 外装缶の開口端部 ２ 正極 ３ セパレータ ４ 負極 ６ 樹脂製封口体 ６１ 樹脂製封口体のボス部 ６２ 樹脂製口体の外周部 ６３ 樹脂製口体の連結部 ６３ａ 薄肉部分 ６３ｂ リブ ７ 金属板（負極端子板） Ｌ1 リブの長さ Ｌ2 連結部の長さDESCRIPTION OF SYMBOLS 1 Outer can 1a Open end of outer can 2 Positive electrode 3 Separator 4 Negative electrode 6 Resin sealing body 61 Boss part of resin sealing body 62 Outer peripheral part of resin mouth body 63 Connecting part of resin mouth body 63a Thin part 63b Rib 7 Metal plate (negative electrode terminal plate) L 1 Length of rib L 2 Length of connection part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小出 浩二 大阪府茨木市丑寅１丁目１番88号 日立マ クセル株式会社内 Ｆターム(参考） 5H011 AA13 AA17 CC06 FF03 GG02 HH02 5H012 AA01 BB04 DD05 FF01 GG03 5H024 CC02 CC14 DD04 DD07 HH01 HH13 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Koji Koide 1-88, Ushitora, Ibaraki-shi, Osaka F-term in Hitachi Maxell, Ltd. (Reference) 5H011 AA13 AA17 CC06 FF03 GG02 HH02 5H012 AA01 BB04 DD05 FF01 GG03 5H024 CC02 CC14 DD04 DD07 HH01 HH13
Claims (1)
び負極と、これらの間に配置されるセパレータと、電解
液とが収容されており、 外装缶の開口端部には、外装缶を封口する手段として、
負極の中心部に挿入される負極集電棒を保持するボス部
と、外装缶の内周面と接する外周部と、一部に薄肉部分
が設けられてボス部と外周部とを連結する連結部とを具
備してなる樹脂製封口体が備えられており、 この樹脂製封口体の連結部には、金属板と対向する面側
に、電池内部圧力上昇時におけるガス抜き経路確保用の
リブが設けられており、 この樹脂製封口体の外周部が、これを内周から支える金
属板と、当該外周部の外側に位置する外装缶とで締め付
けられていることにより、外装缶の開口端部側が封口さ
れたアルカリ乾電池であって、 前記金属板が、負極端子を兼ねた鋼板一枚で構成されて
おり、 前記リブの長さが連結部の長さの２０〜７０％に設定さ
れていることを特徴とするアルカリ乾電池。A positive electrode, a negative electrode, a separator disposed therebetween, and an electrolyte are accommodated in a cylindrical outer can having a bottom. As a means to seal the can,
A boss that holds the negative electrode current collector rod inserted into the center of the negative electrode, an outer peripheral portion that is in contact with the inner peripheral surface of the outer can, and a connecting portion that is provided with a thin portion in part and connects the boss and the outer peripheral portion A resin sealing body comprising: a connecting portion of the resin sealing body, on a surface side facing the metal plate, a rib for securing a gas release path when the internal pressure of the battery rises. The outer peripheral portion of the resin sealing body is fastened by a metal plate supporting the inner peripheral portion thereof and an outer can located outside the outer peripheral portion. The side is a sealed alkaline dry battery, wherein the metal plate is formed of a single steel plate also serving as a negative electrode terminal, and the length of the rib is set to 20 to 70% of the length of the connecting portion. An alkaline dry battery, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000266376A JP2002075315A (en) | 2000-09-04 | 2000-09-04 | Alkaline dry battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000266376A JP2002075315A (en) | 2000-09-04 | 2000-09-04 | Alkaline dry battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002075315A true JP2002075315A (en) | 2002-03-15 |
Family
ID=18753471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000266376A Pending JP2002075315A (en) | 2000-09-04 | 2000-09-04 | Alkaline dry battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002075315A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008139749A1 (en) * | 2007-05-09 | 2008-11-20 | Panasonic Corporation | Alkaline battery |
| JP2009259533A (en) * | 2008-04-15 | 2009-11-05 | Panasonic Corp | Alkaline battery and sealing unit for alkaline battery |
| WO2018116911A1 (en) * | 2016-12-19 | 2018-06-28 | Fdk株式会社 | Sealing gasket for circular cylindrical shaped alkaline battery and circular cylindrical shaped alkaline battery |
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| JPH07122247A (en) * | 1993-10-26 | 1995-05-12 | Hitachi Maxell Ltd | Cylindrical alkaline battery |
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| JP2002543565A (en) * | 1999-04-27 | 2002-12-17 | エヴァレディー バッテリー カンパニー インコーポレイテッド | Electrochemical cell with low profile seal assembly with anti-release vent |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07105925A (en) * | 1993-10-07 | 1995-04-21 | Matsushita Electric Ind Co Ltd | Alkaline battery in cylindrical form |
| JPH07122247A (en) * | 1993-10-26 | 1995-05-12 | Hitachi Maxell Ltd | Cylindrical alkaline battery |
| JP2000100400A (en) * | 1998-09-25 | 2000-04-07 | Matsushita Electric Ind Co Ltd | Tubular alkaline battery |
| JP2000195478A (en) * | 1998-12-24 | 2000-07-14 | Toshiba Battery Co Ltd | Cylindrical alkali battery |
| JP2002543565A (en) * | 1999-04-27 | 2002-12-17 | エヴァレディー バッテリー カンパニー インコーポレイテッド | Electrochemical cell with low profile seal assembly with anti-release vent |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008139749A1 (en) * | 2007-05-09 | 2008-11-20 | Panasonic Corporation | Alkaline battery |
| JP2009259533A (en) * | 2008-04-15 | 2009-11-05 | Panasonic Corp | Alkaline battery and sealing unit for alkaline battery |
| JP4672041B2 (en) * | 2008-04-15 | 2011-04-20 | パナソニック株式会社 | Alkaline battery and alkaline battery sealing unit |
| WO2018116911A1 (en) * | 2016-12-19 | 2018-06-28 | Fdk株式会社 | Sealing gasket for circular cylindrical shaped alkaline battery and circular cylindrical shaped alkaline battery |
| JP2018101468A (en) * | 2016-12-19 | 2018-06-28 | Fdk株式会社 | Sealing gasket of cylindrical alkaline cell and cylindrical alkaline cell |
| CN110050358A (en) * | 2016-12-19 | 2019-07-23 | Fdk株式会社 | Cylindrical alkaline battery seal washer and cylindrical alkaline battery |
| US11594740B2 (en) | 2016-12-19 | 2023-02-28 | Fdk Corporation | Sealing gasket for cylindrical alkaline battery and cylindrical alkaline battery |
| CN110050358B (en) * | 2016-12-19 | 2023-09-05 | Fdk株式会社 | Sealing gasket for cylindrical alkaline cell and cylindrical alkaline cell |
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