JP6302654B2 - Cylindrical battery - Google Patents

Cylindrical battery Download PDF

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JP6302654B2
JP6302654B2 JP2013252065A JP2013252065A JP6302654B2 JP 6302654 B2 JP6302654 B2 JP 6302654B2 JP 2013252065 A JP2013252065 A JP 2013252065A JP 2013252065 A JP2013252065 A JP 2013252065A JP 6302654 B2 JP6302654 B2 JP 6302654B2
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battery
negative electrode
terminal plate
sealing gasket
positive electrode
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JP2015109228A (en
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鈴木　拓也
拓也 鈴木
山崎　龍也
龍也 山崎
秀典 都築
秀典 都築
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FDK Corp
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    • 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
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    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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    • Y02E60/10—Energy storage using batteries

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Description

本発明は、筒型電池に関する。   The present invention relates to a cylindrical battery.

筒型電池は、アルカリ電池等の一次電池として各種電気機器に広く使用されている。筒型電池では、正極と負極とがショートしたり、使用器具に電池の極性を誤って装填したりした場合の発熱、液漏れ、膨張等の不具合を防止するために、電池の構造に様々な工夫が取り入れられている。   Cylindrical batteries are widely used in various electrical devices as primary batteries such as alkaline batteries. In cylindrical batteries, there are various battery structures to prevent problems such as heat generation, liquid leakage, and expansion when the positive and negative electrodes are short-circuited or the battery polarity is incorrectly loaded in the equipment used. Ingenuity is incorporated.

正極と負極とのショートを防止する点では、例えば、正極電池缶と負極端子板とが不用意に導通しないように、正極電池缶の表面に紫外線硬化樹脂（ＵＶ硬化樹脂）等の絶縁被膜を形成した上で、外装ラベルを装着することが行われている。また、電池を誤装填した場合に、負極端子板同士が接触しないように、電池缶の負極端子側で外装ラベルの下に円環状の絶縁ワッシャーを設けたり、単１、単２電池等では、負極端子板表面に絶縁性の突起を設けて、誤装填しても負極端子板同士が接触しないようにしたりしている。   In order to prevent a short circuit between the positive electrode and the negative electrode, for example, an insulating coating such as an ultraviolet curable resin (UV curable resin) is provided on the surface of the positive electrode battery can so that the positive electrode battery can and the negative electrode terminal plate do not inadvertently conduct. After forming, attaching an exterior label is performed. In addition, when a battery is loaded incorrectly, an annular insulating washer is provided under the outer label on the negative electrode terminal side of the battery can so that the negative electrode terminal plates do not come into contact with each other. Insulating protrusions are provided on the surface of the negative electrode terminal plate so that the negative electrode terminal plates do not come into contact with each other even if loaded incorrectly.

この点、特許文献１（特開平８−７７９８６号公報）では、「有底筒状缶の開口部内周と皿状端子板の外周縁部との間に封口ガスケットを介装し、該缶の該開口部を内側に絞り加工することによって該皿状端子板との間の空隙を該封口ガスケットによって密閉してなる筒形電池において、該ガスケットの先端を該開口部の開口端より０．５から１．５ｍｍ長くして該端子板の上面に向けて延出してなる」構成を採用し、「電池が落下による衝撃によって筒状缶の肩部が凹んで、その開口端エッジが内側に潰れても、そのエッジは内側に位置するガスケットの先端部に食込むのみで、この部分を越えて端子板側に接触することが未然に防止」されるとしている。   In this regard, Patent Document 1 (Japanese Patent Application Laid-Open No. 8-77986) discloses that a sealing gasket is interposed between the inner periphery of the opening of the bottomed cylindrical can and the outer peripheral edge of the dish-shaped terminal plate. In the cylindrical battery in which the gap between the opening and the dish-shaped terminal plate is sealed by the sealing gasket by drawing the opening to the inside, the tip of the gasket is placed at a distance of 0.5 from the opening end of the opening. ”1.5 mm longer and extended toward the upper surface of the terminal board”, adopting the configuration that “the shoulder of the cylindrical can is recessed due to the impact of the battery dropping, and the opening edge of the battery is crushed inward. However, the edge only bites into the front end of the gasket located on the inner side, and it is possible to prevent contact with the terminal board side beyond this portion.

特開平８−７７９８６号公報JP-A-8-77986

しかしながら、特許文献１に提案されている技術は、あくまでも電池缶の変形が生じた場合を想定した対策であって、電池の誤装填、正負極のショートといった不都合自体を防止することはできない。また、絶縁ワッシャーあるいは絶縁突起を設ける構成では、部品点数、製造工程の増加により製造歩留まりの悪化、製造コスト上昇が避けられない。絶縁ワッシャーに関しては、電池缶の外装ラベルが破損して絶縁ワッシャーが脱落した場合、ショート防止の効果がまったく期待できなくなってしまう。さらに、Ｒ６（単３形）、Ｒ０３（単４形）、Ｒ１（単５形）といった小型の電池では、端子面積が小さく、ＵＶ硬化樹脂を塗布して誤装填を防止することは困難である。   However, the technique proposed in Patent Document 1 is a measure that assumes a case where the battery can is deformed to the last, and cannot prevent inconveniences such as erroneous loading of the battery and short-circuiting of the positive and negative electrodes. In addition, in the configuration in which the insulating washer or the protrusion is provided, it is inevitable that the manufacturing yield is deteriorated and the manufacturing cost is increased due to an increase in the number of parts and manufacturing processes. As for the insulating washer, if the outer label of the battery can is damaged and the insulating washer is dropped, the effect of preventing the short circuit cannot be expected at all. Furthermore, in small batteries such as R6 (single 3 type), R03 (single 4 type), R1 (single 5 type), the terminal area is small, and it is difficult to prevent erroneous loading by applying UV curable resin. .

本発明は、上記のような問題点を解決するためになされたもので、筒型電池において、正極と負極とのショートを効果的に防止するとともに、誤装填された場合でも発熱等の不具合が生じないようにすることを一つの目的としている。   The present invention has been made to solve the above-described problems, and in a cylindrical battery, while effectively preventing a short circuit between the positive electrode and the negative electrode, there is a problem such as heat generation even when the battery is erroneously loaded. One purpose is to prevent it from occurring.

前記の、及び他の問題点を解決するために、本発明の一つの態様は、有底円筒状の電池缶内に、環状の正極合剤と、当該正極合剤の内側に配置される有底円筒状のセパレータと、当該セパレータの内側に配置される負極ゲルとが収納されているとともに、前記電池缶の開口に負極端子板が封口ガスケットを介して嵌着されてなる筒型電池であって、
前記封口ガスケットは、略円盤状に一体的に成形された樹脂からなり、前記円盤の中心にて上下方向に中空円筒状に突設されているボス部と、当該ボス部から径方向外方に延在する略円盤状の部分である円盤部とを備え、
該円盤部の外周端は、前記負極端子板と前記電池缶との間でかしめられた状態で、前記負極端子板がなす外表面から突出している、
ことを特徴とする筒型電池である。 In order to solve the above-mentioned and other problems, one aspect of the present invention provides an annular positive electrode mixture and a positive electrode mixture disposed inside the bottomed cylindrical battery can. A cylindrical battery in which a bottom cylindrical separator and a negative electrode gel disposed inside the separator are housed, and a negative terminal plate is fitted into an opening of the battery can via a sealing gasket. And
The sealing gasket is made of a resin integrally formed in a substantially disc shape, and has a boss portion projecting in a hollow cylindrical shape in the vertical direction at the center of the disc, and radially outward from the boss portion. A disk portion that is a substantially disk-shaped portion extending,
The outer peripheral end of the disk portion is caulked between the negative electrode terminal plate and the battery can and protrudes from the outer surface formed by the negative electrode terminal plate.
This is a cylindrical battery.

前記の筒型電池では、前記封口ガスケットが前記負極端子板と前記電池缶との間でかしめられた状態で、前記封口ガスケットの前記円盤部は、その外周端縁部において前記負極端子板の外周縁部に密接しており、前記円盤部には、前記負極端子板と前記電池缶との間に形成される空間と外部空間とを連通させるための開口部を設けてもよい。   In the cylindrical battery, the disc portion of the sealing gasket is formed on the outer peripheral edge of the sealing gasket with the sealing gasket being caulked between the negative electrode terminal plate and the battery can. Close to the periphery, the disk portion may be provided with an opening for communicating a space formed between the negative electrode terminal plate and the battery can and an external space.

本発明の一態様によれば、筒型電池において、正極と負極とのショートを効果的に防止するとともに、誤装填された場合でも発熱等の不具合が生じないようにすることができる。   According to one embodiment of the present invention, in a cylindrical battery, it is possible to effectively prevent a short circuit between a positive electrode and a negative electrode, and to prevent problems such as heat generation even when the battery is erroneously loaded.

図１は、本発明の一実施形態に係る筒型アルカリ電池の構成例を示す模式図である。FIG. 1 is a schematic diagram showing a configuration example of a cylindrical alkaline battery according to an embodiment of the present invention. 図２は、図１に例示する筒型アルカリ電池の組み立て手順を示す模式図である。FIG. 2 is a schematic diagram illustrating an assembling procedure of the cylindrical alkaline battery illustrated in FIG. 図３は、図１に例示する筒型アルカリ電池の組み立て手順を示す模式図である。FIG. 3 is a schematic diagram illustrating an assembling procedure of the cylindrical alkaline battery illustrated in FIG. 図４は、本発明の他の実施形態に係る筒型アルカリ電池の組み立て手順を示す模式図である。FIG. 4 is a schematic diagram showing an assembling procedure of a cylindrical alkaline battery according to another embodiment of the present invention. 図５は、図４に例示した筒型アルカリ電池の構成例を示す部分拡大図である。FIG. 5 is a partially enlarged view showing a configuration example of the cylindrical alkaline battery illustrated in FIG. 図６は、図５に例示する筒型アルカリ電池の封口ガスケット７０の構成例を示す図である。FIG. 6 is a diagram illustrating a configuration example of the sealing gasket 70 of the cylindrical alkaline battery illustrated in FIG. 図７は、一般的な筒型アルカリ電池の構成例を示す縦断面図である。FIG. 7 is a longitudinal sectional view showing a configuration example of a general cylindrical alkaline battery.

以下に、添付図面を参照して、本発明の実施形態を更に具体的に説明する。なお、本発明は、それらの実施形態に限定されるものではない。   Hereinafter, embodiments of the present invention will be described more specifically with reference to the accompanying drawings. Note that the present invention is not limited to these embodiments.

まず、図７に、一般的な筒型アルカリ電池１の構成例を示す縦断面図を示している。このアルカリ電池１は、ＬＲ６タイプ（単３形）の電池である。   First, FIG. 7 shows a longitudinal sectional view showing a configuration example of a general cylindrical alkaline battery 1. The alkaline battery 1 is an LR6 type (AA) battery.

図７に示されるように、アルカリ電池１は、有底筒状の正極缶１０（電池缶）と、その正極缶１０の内面に沿って嵌着されたリング状の正極合剤２０と、正極合剤２０の内側に挿入される有底筒状のセパレータ３０と、正極缶１０の中心部となるセパレータ３０の中空部に配置されるゲル状負極合剤４０と、正極缶１０の開口部１０ａに装着される負極集電体５０（以下単に「集電体５０」という）とを備える。   As shown in FIG. 7, the alkaline battery 1 includes a bottomed cylindrical positive electrode can 10 (battery can), a ring-shaped positive electrode mixture 20 fitted along the inner surface of the positive electrode can 10, a positive electrode The bottomed cylindrical separator 30 inserted inside the mixture 20, the gelled negative electrode mixture 40 disposed in the hollow portion of the separator 30 that is the center of the positive electrode can 10, and the opening 10 a of the positive electrode can 10. And a negative electrode current collector 50 (hereinafter simply referred to as “current collector 50”).

正極缶１０は、例えばニッケルメッキ鋼板を有底筒状にプレス成形することによって形成され、その底部の中央に正極端子１２が突設されている。正極合剤２０は、例えば電解二酸化マンガン、黒鉛、水酸化カリウム、及びバインダを混合した正極合剤粉を整粒した後、これを円筒状にプレス成形することで作製される。   The positive electrode can 10 is formed, for example, by press-molding a nickel-plated steel plate into a bottomed cylindrical shape, and a positive electrode terminal 12 projects from the center of the bottom. The positive electrode mixture 20 is produced, for example, by adjusting the positive electrode mixture powder in which electrolytic manganese dioxide, graphite, potassium hydroxide, and a binder are mixed, and then press-molding the powder into a cylindrical shape.

セパレータ３０は、正極合剤２０とゲル状負極合剤４０との間を電気的に分離する絶縁材料であり、ビニロン・レーヨン不織布、ポリオレフィン・レーヨン不織布などのセパレータ原紙を円筒状に巻回し、重なり合う部分を熱融着させることで作製される。   The separator 30 is an insulating material that electrically separates between the positive electrode mixture 20 and the gelled negative electrode mixture 40, and separator base paper such as vinylon / rayon nonwoven fabric or polyolefin / rayon nonwoven fabric is wound in a cylindrical shape and overlapped. It is produced by thermally fusing the part.

ゲル状負極合剤４０は、水と酸化亜鉛と水酸化カリウムとを混ぜて溶解し、ポリアクリル酸などのゲル化剤と亜鉛粉とを混合することで作製される。   The gelled negative electrode mixture 40 is prepared by mixing water, zinc oxide and potassium hydroxide and dissolving them, and mixing a gelling agent such as polyacrylic acid and zinc powder.

集電体５０は、負極端子板６０、負極集電子５１、及び封口ガスケット７０を備えて構成されている。正極缶１０の開口部１０ａ付近には、集電体５０を載置するためのビード部１１が形成されている。そして、そのビード部１１上に集電体５０を載置した状態で、正極缶１０の開口部１０ａにカール及び絞り加工を施すことにより、正極缶１０が封口されている。言い換えると、アルカリ電池１の正極缶１０は、開口部１０ａを径方向（横断方向）に収縮させてかしめることにより封口されている。   The current collector 50 includes a negative electrode terminal plate 60, a negative electrode current collector 51, and a sealing gasket 70. A bead portion 11 for mounting the current collector 50 is formed in the vicinity of the opening 10 a of the positive electrode can 10. The positive electrode can 10 is sealed by curling and drawing the opening 10 a of the positive electrode can 10 with the current collector 50 placed on the bead portion 11. In other words, the positive electrode can 10 of the alkaline battery 1 is sealed by shrinking and crimping the opening 10a in the radial direction (transverse direction).

集電体５０は、真鍮を用いて棒状に形成された負極集電子５１をその基端側の頭部で負極端子板６０の裏面に抵抗溶接するとともに、負極集電子５１の首部に封口ガスケット７０を嵌着することによって、形成されている。負極集電子５１の先端側は、ゲル状負極合剤４０の中に挿入されている。   In the current collector 50, a negative electrode current collector 51 formed in a rod shape using brass is resistance-welded to the back surface of the negative electrode terminal plate 60 at the head on the proximal end side, and a sealing gasket 70 is formed on the neck of the negative electrode current collector 51. It is formed by fitting. The tip end side of the negative electrode current collector 51 is inserted into the gelled negative electrode mixture 40.

負極端子板６０は、正極缶１０と同じくニッケルメッキ鋼板をプレス成形することによって作製され、封口ガスケット７０を介して正極缶１０の開口部１０ａを封止している。負極端子板６０は、円形皿状に形成され、その外縁部６０ａはほぼ直角に折り曲げられている。負極端子板６０の外周つば状の部位には、複数のガス抜き穴６１が設けられている。図７の例では、負極端子板６０に、９０°間隔で４箇所のガス抜き穴６１が設けられている。   The negative electrode terminal plate 60 is produced by press-molding a nickel-plated steel plate in the same manner as the positive electrode can 10, and seals the opening 10 a of the positive electrode can 10 through a sealing gasket 70. The negative electrode terminal plate 60 is formed in a circular dish shape, and the outer edge portion 60a is bent substantially at a right angle. A plurality of gas vent holes 61 are provided in the outer peripheral collar portion of the negative electrode terminal plate 60. In the example of FIG. 7, four gas vent holes 61 are provided in the negative electrode terminal plate 60 at intervals of 90 °.

封口ガスケット７０は、樹脂材料を用いて射出成形された樹脂成形品である。封口ガスケット７０の形成材料としては、６，１２ナイロン樹脂、６，１０ナイロン樹脂、６，６ナイロン樹脂などのポリアミド樹脂が好適に用いられる。封口ガスケット７０は、中心部に配置されている筒状のボス部７１と、ボス部７１から径方向外方に展開するように設けられている環状の円盤部７２とを備える。ボス部７１の中心部には貫通穴が設けられ、負極集電子５１が挿通されている。封口ガスケット７０は、電極ショート等によりガスが発生してアルカリ電池１内部の圧力が高まった場合に、円盤部７２のボス部７１との接続部分において、あらかじめ設定した所定の圧力値付近で破断するように構成されている。これにより高まった電池内圧は、ガスが破断部から負極端子板６０のガス抜き穴６１を通じて外気に放出されることにより低減され、アルカリ電池１の破裂は防止される。   The sealing gasket 70 is a resin molded product that is injection-molded using a resin material. As a material for forming the sealing gasket 70, polyamide resins such as 6,12 nylon resin, 6,10 nylon resin, and 6,6 nylon resin are preferably used. The sealing gasket 70 includes a cylindrical boss portion 71 disposed in the center portion and an annular disk portion 72 provided so as to expand radially outward from the boss portion 71. A through hole is provided at the center of the boss 71, and the negative electrode current collector 51 is inserted therethrough. When gas is generated due to an electrode short-circuit or the like and the pressure inside the alkaline battery 1 is increased, the sealing gasket 70 is broken near a predetermined pressure value set in advance at the connection portion of the disk portion 72 with the boss portion 71. It is configured as follows. The battery internal pressure thus increased is reduced by releasing the gas from the fractured portion to the outside air through the gas vent hole 61 of the negative electrode terminal plate 60, and the alkaline battery 1 is prevented from being ruptured.

次に、以上説明した一般的な筒型アルカリ電池１の構成を前提として、本発明の一実施形態に係る筒型アルカリ電池１の構成について説明する。図１に、本発明の一実施形態に係る筒型アルカリ電池１の構成例を示す部分縦断面図を示している。図１において、図７に図示した構成要素と同一の構成要素には同一の参照符号を付して示し、詳細な説明は省略する。   Next, on the premise of the configuration of the general cylindrical alkaline battery 1 described above, the configuration of the cylindrical alkaline battery 1 according to an embodiment of the present invention will be described. FIG. 1 is a partial longitudinal sectional view showing a configuration example of a cylindrical alkaline battery 1 according to an embodiment of the present invention. In FIG. 1, the same components as those shown in FIG. 7 are denoted by the same reference numerals, and detailed description thereof is omitted.

図１に例示する部分縦断面図には、本発明の実施形態による筒型アルカリ電池１の、正極缶１０の上端の開口部１０ａと、負極端子板６０及び封口ガスケット７０を含めて示されている。図１のアルカリ電池１では、図７に示した従来例とは異なり、封口ガスケット７０の円盤部７２の外周端側に、上方に向けてほぼ直角に折り曲げられた折曲部７０ａが設けられている。この折曲部７０ａは、封口ガスケット７０を負極端子板６０と正極缶１０の開口部１０ａとの間でかしめつけた時に、その端縁部が負極端子板６０の極板平面よりも外方に（筒型アルカリ電池１の長手方向で負極端子板６０の極板平面よりも突出するように）設けられている。言い換えれば、封口ガスケット７０の円盤部７２の寸法、及び折曲部７０ａの形状及び寸法は、封口ガスケット７０を負極端子板６０と正極缶１０の開口部１０ａとの間でかしめつけた時に、折曲部７０ａが負極端子板６０の極板平面よりも突出するように設定されている。したがって、封口ガスケット７０において、円盤部７２及び折曲部７０ａの具体的な構成は、その封口ガスケット７０が適用される筒型電池１の規格等に合わせて適宜設定することができる。   In the partial longitudinal sectional view illustrated in FIG. 1, the cylindrical alkaline battery 1 according to the embodiment of the present invention is shown including the opening 10 a at the upper end of the positive electrode can 10, the negative terminal plate 60, and the sealing gasket 70. Yes. In the alkaline battery 1 of FIG. 1, unlike the conventional example shown in FIG. 7, a bent portion 70 a that is bent substantially perpendicularly upward is provided on the outer peripheral end side of the disc portion 72 of the sealing gasket 70. Yes. When the sealing gasket 70 is caulked between the negative electrode terminal plate 60 and the opening 10 a of the positive electrode can 10, the bent portion 70 a has an end edge outward from the electrode plate plane of the negative electrode terminal plate 60. (It protrudes from the electrode plate plane of the negative electrode terminal plate 60 in the longitudinal direction of the cylindrical alkaline battery 1). In other words, the dimensions of the disk portion 72 of the sealing gasket 70 and the shape and dimensions of the bent portion 70a are determined when the sealing gasket 70 is caulked between the negative electrode terminal plate 60 and the opening 10a of the positive electrode can 10. The curved portion 70 a is set so as to protrude from the electrode plate plane of the negative electrode terminal plate 60. Therefore, in the sealing gasket 70, the specific structure of the disk part 72 and the bending part 70a can be suitably set according to the specification of the cylindrical battery 1 to which the sealing gasket 70 is applied.

このように、封口ガスケット７０の外周に設けた折曲部７０ａが正極缶１０と負極端子板６０との間を隔離するように両者の間に介在することにより、正極缶１０と負極端子板６０との間に導電性の異物（例えばクリップ、ヘアピンなど）が入り込んで外部ショートが発生するのを防止することができる。また、電池１を電池ボックスに誤装填した場合に、正極側の極板バネ板が負極端子板６０に接触するのを防ぐことができる。さらに、他の電池１と直列に接続するところを負極同士が対向するように誤装填した場合にも、対向する電池１の負極端子板６０から突出した折曲部７０ａが互いに当接することにより負極端子板６０同士が接触することが防止される。以上のように、本実施形態の筒型アルカリ電池１では、簡易な構成の変更により従来よりも大幅に安全性を向上させることが可能となっている。   As described above, the bent portion 70a provided on the outer periphery of the sealing gasket 70 is interposed between the positive electrode can 10 and the negative electrode terminal plate 60 so as to isolate the positive electrode can 10 and the negative electrode terminal plate 60, thereby the positive electrode can 10 and the negative electrode terminal plate 60. It is possible to prevent the occurrence of an external short circuit due to a conductive foreign substance (for example, a clip, a hairpin, etc.) entering between the two. In addition, when the battery 1 is erroneously loaded into the battery box, the positive electrode leaf spring plate can be prevented from contacting the negative electrode terminal plate 60. Furthermore, even when the negative electrodes are misloaded so that the negative electrodes face each other when they are connected in series with other batteries 1, the bent portions 70 a protruding from the negative electrode terminal plate 60 of the opposite battery 1 come into contact with each other, so that the negative electrodes Contact between the terminal boards 60 is prevented. As described above, in the cylindrical alkaline battery 1 according to the present embodiment, it is possible to significantly improve the safety by changing the simple configuration.

図２及び図３に、図１のアルカリ電池１の組立工程を模式的に示している。図２に示すように、封口ガスケット７０のボス部７１に設けられている貫通孔に、負極端子板６０に固接された負極集電子５１が挿通される。次いで、図３に示すように、正極缶１０の開口部１０ａを、封口ガスケット７０の円盤部７２を径方向内方へ向けて巻き込むようにして負極端子板６０にかしめつける。これにより、図３の右端の図に図示されているように、封口ガスケット７０の円盤部７２に設けられる折曲部７０ａは負極端子板６０と正極缶１０の開口部１０ａとの間に介在するように配置されることとなる。   2 and 3 schematically show the assembly process of the alkaline battery 1 of FIG. As shown in FIG. 2, the negative electrode current collector 51 fixedly attached to the negative electrode terminal plate 60 is inserted into the through hole provided in the boss portion 71 of the sealing gasket 70. Next, as shown in FIG. 3, the opening 10 a of the positive electrode can 10 is caulked to the negative electrode terminal plate 60 so that the disk portion 72 of the sealing gasket 70 is wound inward in the radial direction. As a result, as shown in the rightmost diagram of FIG. 3, the bent portion 70 a provided in the disk portion 72 of the sealing gasket 70 is interposed between the negative electrode terminal plate 60 and the opening 10 a of the positive electrode can 10. Will be arranged as follows.

次に、以上説明した実施形態の変形例について説明する。図４に、本実施形態の変形例に係る筒型アルカリ電池１の組立工程を、図３の例に対応させて模式的に示している。図４の変形例では、封口ガスケット７０の円盤部７２には折曲部７０ａが設けられていない。その代わりに、図４に例示するように、封口ガスケット７０を正極缶１０の開口部１０ａとともに負極端子板６０に対してかしめつけた時、封口ガスケット７０の円盤部７２の端縁部７０ｂは負極端子板６０の肩部６０ａに密接するようになっている。図５には、図１に対応する本変形例の部分縦断面図を示している。   Next, a modification of the embodiment described above will be described. FIG. 4 schematically shows an assembling process of the cylindrical alkaline battery 1 according to the modification of the present embodiment, corresponding to the example of FIG. In the modification of FIG. 4, the bent portion 70 a is not provided in the disk portion 72 of the sealing gasket 70. Instead, as illustrated in FIG. 4, when the sealing gasket 70 is caulked against the negative electrode terminal plate 60 together with the opening 10 a of the positive electrode can 10, the edge portion 70 b of the disk portion 72 of the sealing gasket 70 is negative. The terminal 60 is in close contact with the shoulder 60a. FIG. 5 shows a partial longitudinal sectional view of the present modification corresponding to FIG.

図４、図５に示すように、本変形例では、先の実施形態と同様に、封口ガスケット７０の円盤部７２が正極缶１０と負極端子板６０との間を隔離するように両者の間に介在することにより、正極缶１０と負極端子板６０との間に導電性の異物（例えばクリップ、ヘアピンなど）が入り込んで外部ショートが発生するのを防止することができる。また、かしめつけられた状態で封口ガスケット７０の円盤部７２の端縁部７０ｂが負極端子板６０の極板平面より突出するように構成すれば、電池１を電池ボックスに誤装填した場合に、正極側の極板バネ板が負極端子板６０に接触するのを防ぐことができる。さらに、他の電池１と直列に接続するところを負極同士が対向するように誤装填した場合にも、対向する電池１の負極端子板６０から突出した折曲部７０ａが互いに当接することにより負極端子板６０同士が接触することが防止される。以上のように、本実施形態の変形例による筒型アルカリ電池１によっても、簡易な構成の変更により従来よりも大幅に安全性を向上させることが可能となっている。   As shown in FIGS. 4 and 5, in this modification, as in the previous embodiment, the disc portion 72 of the sealing gasket 70 is separated between the positive electrode can 10 and the negative electrode terminal plate 60. By interposing, the conductive foreign matter (for example, a clip, a hairpin, etc.) enters between the positive electrode can 10 and the negative electrode terminal plate 60, and it can prevent that an external short circuit generate | occur | produces. Further, if the edge portion 70b of the disc portion 72 of the sealing gasket 70 is protruded from the electrode plate plane of the negative electrode terminal plate 60 in the state of being swaged, when the battery 1 is erroneously loaded into the battery box, It is possible to prevent the positive electrode leaf spring plate from contacting the negative electrode terminal plate 60. Furthermore, even when the negative electrodes are misloaded so that the negative electrodes face each other when they are connected in series with other batteries 1, the bent portions 70 a protruding from the negative electrode terminal plate 60 of the opposite battery 1 come into contact with each other, so that the negative electrodes Contact between the terminal boards 60 is prevented. As described above, also with the cylindrical alkaline battery 1 according to the modification of the present embodiment, it is possible to significantly improve the safety by changing the simple configuration.

なお、図４、図５に例示するように、上記の変形例による筒型アルカリ電池１では、封口ガスケット７０が負極端子板６０と正極缶１０との間を密封してしまうため、電池１の封口ガスケット７０が破断して放出されたガスが、負極端子板６０、封口ガスケット７０、及び正極缶１０によって閉鎖された空間に封じ込められてしまい、内圧の逃がし機能が十分に働かないことがあり得る。このため、上記の変形例では、封口ガスケット７０にガス抜き穴７４を設けている。図６にガス抜き穴７４の配置例を示している。図６は、変形例による筒型アルカリ電池１を負極端子板６０側から軸方向に見た模式平面図である。図６の例では、封口ガスケット７０の円盤部７２の、負極端子板６０と正極缶１０との間に相当する部分において、周方向等間隔に８個のガス抜き穴７４を設けている。ガス抜き穴７４は、図６の例に限定されることなく、スリット状の形状にする、あるいは設置数、配置等を変えるなど、適宜に調整することができる。   As illustrated in FIGS. 4 and 5, in the cylindrical alkaline battery 1 according to the above modification, the sealing gasket 70 seals between the negative electrode terminal plate 60 and the positive electrode can 10. The gas released when the sealing gasket 70 is broken is confined in the space closed by the negative electrode terminal plate 60, the sealing gasket 70, and the positive electrode can 10, and the internal pressure relief function may not work sufficiently. . For this reason, in the above-described modification, the vent hole 74 is provided in the sealing gasket 70. FIG. 6 shows an arrangement example of the gas vent holes 74. FIG. 6 is a schematic plan view of the cylindrical alkaline battery 1 according to the modification as viewed in the axial direction from the negative electrode terminal plate 60 side. In the example of FIG. 6, eight degassing holes 74 are provided at equal intervals in the circumferential direction in a portion corresponding to the space between the negative electrode terminal plate 60 and the positive electrode can 10 in the disk portion 72 of the sealing gasket 70. The gas vent holes 74 are not limited to the example of FIG. 6 and can be adjusted as appropriate, for example, to have a slit shape, or to change the number of installations, arrangement, and the like.

以上詳細に説明したように、本発明の実施形態に係る筒型アルカリ電池１によれば、正極缶１０と負極端子板６０との間での外部ショートが発生するのを防止することができる。また、電池１を使用機器等の電池ボックスに誤装填した場合に、正極側の極板バネ板が負極端子板６０に接触するのを防ぐことができる。さらに、他の電池１と直列に接続するところを負極同士が対向するように誤装填した場合にも、負極端子板６０同士が接触することが防止される。これにより、筒型アルカリ電池１について、簡易な構成の変更により従来よりも大幅に安全性を向上させることが可能となっている。   As described above in detail, according to the cylindrical alkaline battery 1 according to the embodiment of the present invention, it is possible to prevent the occurrence of an external short circuit between the positive electrode can 10 and the negative electrode terminal plate 60. In addition, when the battery 1 is erroneously loaded in a battery box such as a device used, it is possible to prevent the positive electrode leaf spring plate from contacting the negative electrode terminal plate 60. Furthermore, even when the negative electrodes are mistakenly loaded so that the negative electrodes face each other when they are connected in series with other batteries 1, the negative electrode terminal plates 60 are prevented from contacting each other. Thereby, about the cylindrical alkaline battery 1, safety | security can be improved significantly conventionally compared with the change of a simple structure.

なお、本発明の実施形態について、筒型（円筒形）アルカリ電池１を例にとって説明したが、本発明は、アルカリ電池以外の形式の電池にも適宜適用することができる。また、適用する電池の断面形状は、円形以外の形状であってもよい。また、封口ガスケット７０に設ける折曲部７０ａ、あるいは円盤部７２の端縁部７０ｂの形状、寸法は、本発明を適用する電池の仕様に合わせて適宜決定して採用することができる。   Although the embodiment of the present invention has been described by taking the cylindrical (cylindrical) alkaline battery 1 as an example, the present invention can be appropriately applied to a battery of a type other than the alkaline battery. Moreover, the cross-sectional shape of the battery to be applied may be a shape other than a circle. Further, the shape and size of the bent portion 70a provided on the sealing gasket 70 or the end edge portion 70b of the disc portion 72 can be appropriately determined and adopted according to the specifications of the battery to which the present invention is applied.

１ 筒型アルカリ電池 １０ 正極缶 １０ａ 開口部
２０ 正極合剤 ３０ セパレータ ４０ ゲル状負極合剤
５０ 集電体 ５１ 負極集電子 ６０ 負極端子板
７０ 封口ガスケット ７０ａ 折曲部 ７０ｂ 端縁部
７１ ボス部 ７２ 円盤部 ７４ ガス抜き穴 DESCRIPTION OF SYMBOLS 1 Cylindrical alkaline battery 10 Positive electrode can 10a Opening part 20 Positive electrode mixture 30 Separator 40 Gel-like negative electrode mixture 50 Current collector 51 Negative electrode current collection 60 Negative electrode terminal board 70 Sealing gasket 70a Bending part 70b Edge part 71 Boss part 72 Disk part 74 Gas vent hole

Claims (1)

有底円筒状の電池缶内に、環状の正極合剤と、当該正極合剤の内側に配置される有底円筒状のセパレータと、当該セパレータの内側に配置される負極ゲルとが収納されているとともに、前記電池缶の開口に負極端子板が封口ガスケットを介して嵌着されてなる筒型電池であって、
前記封口ガスケットは、略円盤状に一体的に成形された樹脂からなり、前記円盤の中心にて上下方向に中空円筒状に突設されているボス部と、当該ボス部から径方向外方に延在する略円盤状の部分である円盤部とを備え、
該円盤部の外周端は、前記負極端子板と前記電池缶との間でかしめられた状態で、前記負極端子板がなす外表面から突出し、
前記封口ガスケットが前記負極端子板と前記電池缶との間でかしめられた状態で、前記封口ガスケットの前記円盤部は、その外周端縁部において前記負極端子板の外周縁部に密接しており、前記円盤部には、前記負極端子板と前記電池缶との間に形成される空間と外部空間とを連通させるための開口部が設けられていることを特徴とする筒型電池。
An annular positive electrode mixture, a bottomed cylindrical separator disposed inside the positive electrode mixture, and a negative electrode gel disposed inside the separator are housed in a bottomed cylindrical battery can. And a negative battery terminal plate fitted into the opening of the battery can via a sealing gasket,
The sealing gasket is made of a resin integrally formed in a substantially disc shape, and has a boss portion projecting in a hollow cylindrical shape in the vertical direction at the center of the disc, and radially outward from the boss portion. A disk portion that is a substantially disk-shaped portion extending,
The outer peripheral edge of the disc-portion, the state in which crimped in between the anode terminal plate and the battery can, protrude from the anode terminal plate forms the outer surface,
With the sealing gasket being caulked between the negative electrode terminal plate and the battery can, the disk portion of the sealing gasket is in close contact with the outer peripheral edge portion of the negative electrode terminal plate at the outer peripheral edge thereof. The cylindrical battery is provided with an opening for communicating a space formed between the negative electrode terminal plate and the battery can and an external space .
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JPH0877986A (en) * 1994-09-05 1996-03-22 Fuji Elelctrochem Co Ltd Cylindrical battery
JP3346191B2 (en) * 1996-11-05 2002-11-18 松下電器産業株式会社 Cylindrical alkaline battery
JP4288538B2 (en) * 1998-10-06 2009-07-01 東芝電池株式会社 Cylindrical battery
JP2000113866A (en) * 1998-10-06 2000-04-21 Toshiba Battery Co Ltd Cylindrical battery
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