JP2825921B2 - Manganese dry cell - Google Patents

Manganese dry cell

Info

Publication number
JP2825921B2
JP2825921B2 JP2074663A JP7466390A JP2825921B2 JP 2825921 B2 JP2825921 B2 JP 2825921B2 JP 2074663 A JP2074663 A JP 2074663A JP 7466390 A JP7466390 A JP 7466390A JP 2825921 B2 JP2825921 B2 JP 2825921B2
Authority
JP
Japan
Prior art keywords
zinc
sealing body
battery
opening
tip
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.)
Expired - Fee Related
Application number
JP2074663A
Other languages
Japanese (ja)
Other versions
JPH03274659A (en
Inventor
誠 浦出
二康 岩丸
勝己 河原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP2074663A priority Critical patent/JP2825921B2/en
Publication of JPH03274659A publication Critical patent/JPH03274659A/en
Application granted granted Critical
Publication of JP2825921B2 publication Critical patent/JP2825921B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Landscapes

  • Sealing Battery Cases Or Jackets (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、亜鉛缶の外周部に樹脂製の外装材を装着し
たマンガン乾電池に関する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a manganese dry battery in which a resin outer material is attached to the outer periphery of a zinc can.

〔従来の技術〕 単3形、単4形、単5形などの小型のマンガン乾電池
では、第5図に示すように、亜鉛缶(1)の開口部に封
口体(7)を配置し、亜鉛缶(1)の封口体(7)との
接触部のほぼ中央部を内方へかしめて封口体(7)を炭
素棒(6)との間で圧縮することにより、亜鉛缶(1)
の開口部を封口し、その亜鉛缶(1)の外周部に熱吸縮
性樹脂チューブまたは樹脂ラベルからなる樹脂製の外装
材(11)を装着して外装した電池が作製されている。
[Prior Art] In small manganese dry batteries such as AA type, AAA type, and AAA type, as shown in FIG. 5, a sealing body (7) is arranged at an opening of a zinc can (1). The zinc can (1) is obtained by caulking inward the substantially central portion of the contact portion of the zinc can (1) with the sealing body (7) and compressing the sealing body (7) with the carbon rod (6).
A battery is manufactured in which the opening is sealed and the outer casing of the zinc can (1) is fitted with a heat-shrinkable resin tube or a resin casing (11) made of a resin label.

これは、単1形の電池などで使用されている金属外装
缶の使用をやめて、亜鉛缶(1)の内容積を大きくし、
正極合剤や電解液などの充填量を多くして、放電容量を
高めると共に、コストの低減をはかるためである。
This is to stop the use of metal outer cans used in batteries, etc., and to increase the inner volume of zinc cans (1),
This is to increase the filling amount of the positive electrode mixture, the electrolytic solution, and the like to increase the discharge capacity and reduce the cost.

そして、この構造の電池においても、貯蔵特性の向上
などをはかるため、電池の密閉性を高めることに考慮が
払われ、例えば、前記のように、亜鉛缶(1)の封口体
(7)との接触部のほぼ中央部を内方にかしめて、亜鉛
缶(1)の内径を小さくし、封口体(7)を局部的に強
力に締め付けることによって、電池の密閉性を高めてい
る。
Also in the battery having this structure, in order to improve the storage characteristics and the like, consideration is given to enhancing the hermeticity of the battery. For example, as described above, the battery (7) of the zinc can (1) and the sealing body (7) are used. The inside of the zinc can (1) is made smaller by caulking inward the approximate center of the contact portion of (1), and the sealing body (7) is locally and strongly tightened to enhance the tightness of the battery.

そのため、誤使用などにより電池が充電されて電解液
の電気分解が起こり、電池内部にガスが発生したとき
に、電池が高圧下で破裂して、電池使用機器を破損させ
るなどの事故が発生する。
For this reason, when the battery is charged due to misuse, electrolysis of the electrolyte occurs, and gas is generated inside the battery, the battery ruptures under high pressure, and an accident such as damaging equipment using the battery occurs. .

これを詳しく説明すると、例えば、4個以上の電池を
直列に接続して使用する場合において、そのうちの1個
の電池を逆向きに接続して使用すると、逆向きに接続さ
れた電池は他の電池によって充電されることになる。ま
た、電池使用機器によっては、回路の故障などで電池が
充電されることがある。
To explain this in detail, for example, in a case where four or more batteries are connected in series and used, if one of the batteries is connected and used in the reverse direction, the battery connected in the opposite direction will be used in the other direction. It will be charged by the battery. Also, depending on the battery-using device, the battery may be charged due to a circuit failure or the like.

これらの場合、マンガン乾電池は充電されると、電解
液の電気分解が起こり、電池内部に水素ガスと酸素ガス
が発生し、電池の内部圧力が上昇して、封口体(7)が
押し上げられ、第6図に示すように、封口体(7)の上
面が内方に折り曲げられた亜鉛缶(1)の開口先端部分
(1b)の先端(1b1)に密接して、その部分での気密性
が高まり、ついには電池が高圧下で破裂するようにな
る。
In these cases, when the manganese dry battery is charged, electrolysis of the electrolytic solution occurs, hydrogen gas and oxygen gas are generated inside the battery, the internal pressure of the battery increases, and the sealing body (7) is pushed up. As shown in FIG. 6, the upper surface of the sealing body (7) is in close contact with the tip (1b 1 ) of the opening tip (1b) of the zinc can (1) bent inward, and airtight at that portion. The battery will eventually burst under high pressure.

しかし、亜鉛缶(1)の開口先端部分(1b)を内方に
折り曲げておくことは、亜鉛缶(1)の封口体(7)と
の接触部のほぼ中央部を内方にかしめる際に、亜鉛缶
(1)の開口先端部分(1b)が外方に広がってかしめ部
(1a)の締付力が低下するのを防止したり、封口体
(7)が亜鉛缶(1)の開口部から飛び出すのを防止す
るために必要であって、亜鉛缶(1)の開口先端部分
(1b)の内方への折り曲げを止めることはできない。
However, bending the open end portion (1b) of the zinc can (1) inwardly requires caulking inward the approximate center of the contact portion of the zinc can (1) with the sealing body (7). In addition, the opening end portion (1b) of the zinc can (1) can be prevented from spreading outward to reduce the tightening force of the caulked portion (1a), and the sealing body (7) can be made of the zinc can (1). This is necessary to prevent the zinc can (1) from jumping out of the opening, and the inward bending of the opening end portion (1b) of the zinc can (1) cannot be stopped.

〔発明が解決しようとする課題〕[Problems to be solved by the invention]

上記のように、この種のマンガン乾電池では、誤使用
などにより充電されると、電池内部にガスが発生して、
電池の内部圧力が上昇し、電池が高圧下で破裂するとい
う問題があった。
As described above, in this type of manganese dry battery, when charged due to misuse, etc., gas is generated inside the battery,
There is a problem that the internal pressure of the battery increases and the battery ruptures under high pressure.

したがって、本発明は、誤使用などによる電池の破裂
を防止して、安全性の高いマンガン乾電池を提供するこ
とを目的とする。
Therefore, an object of the present invention is to provide a highly safe manganese dry battery by preventing the battery from being ruptured due to misuse or the like.

〔課題を解決するための手段〕[Means for solving the problem]

上記課題を解決するための手段を実施例に対応する第
1〜4図を用いて説明すると、本発明は、封口体(7)
の上部に、封口体(7)の外周面から亜鉛缶(1)の開
口先端部分(1b)の先端(1b1)より内周側に達する溝
(7b)を設けたものである。
The means for solving the above problems will be described with reference to FIGS. 1 to 4 corresponding to the embodiment.
A groove (7b) extending from the outer peripheral surface of the sealing body (7) to the inner peripheral side from the tip (1b 1 ) of the opening tip portion (1b) of the zinc can (1).

〔作用〕[Action]

作用を実施例に対応する第1〜2図を用い、かつ従来
電池に対応する第5〜6図を一部引用して説明すると次
の通りである。
The operation will be described below with reference to FIGS. 1 and 2 corresponding to the embodiment and partially referring to FIGS. 5 to 6 corresponding to the conventional battery.

電池が正常な状態にあって電池の内部圧力が上昇して
いない場合には、第1図に示すように、亜鉛缶(1)の
かしめ部(1a)のところで封口体(7)が強く圧縮され
て高い密閉性が確保されている。
When the battery is in a normal state and the internal pressure of the battery has not increased, as shown in FIG. 1, the sealing body (7) is strongly compressed at the caulked portion (1a) of the zinc can (1). High airtightness is assured.

しかし、充電によって電池の内部圧力が上昇した場合
には、封口体(7)が押し上げられ、溝(7b)を設けて
いない部分では、封口体(7)の上面が亜鉛缶(1)の
開口先端部分(1b)の先端(1b1)に密接する。つま
り、封口体(7)の上部に溝(7b)を設けていない従来
電池の第6図と同じ状態になる。なお、封口体(7)の
上面と亜鉛缶(1)の開口先端部分(1b)の先端(1
b1)との間に隙間がない場合には、封口体(7)が亜鉛
缶(1)の開口先端部分(1b)の先端(1b1)を押し上
げつつ上昇する。
However, when the internal pressure of the battery rises due to charging, the sealing body (7) is pushed up, and the upper surface of the sealing body (7) has an opening in the zinc can (1) where no groove (7b) is provided. closely to the tip of the tip portion (1b) (1b 1). That is, the state is the same as that of FIG. 6 of the conventional battery in which the groove (7b) is not provided on the upper portion of the sealing body (7). The top of the sealing body (7) and the tip (1b) of the opening tip (1b) of the zinc can (1)
If there is no gap between the b 1) and is sealing body (7) is increased while pushing up the leading end of the opening tip portion of the zinc can (1) (1b) (1b 1).

さらに電池の内部圧力が上昇すると、封口体(7)が
亜鉛缶(1)の開口先端部分(1b)の先端(1b1)を押
し上げつつさらに上昇し、第2図に示すように、封口体
(7)の外周面の下端が亜鉛缶(1)のかしめ部(1a)
を通り越して、封口体(7)の外周面と亜鉛缶(1)の
内周面との間の密接度が低下し、封口体(7)の外周面
と亜鉛缶(1)の内周面との間に微細な隙間が生じるよ
うになるが、その反面、溝(7b)を設けていない部分や
第5〜6図に示す従来電池では、封口体(7)の上面と
亜鉛缶(1)の開口先端部分(1b)の先端(1b1)との
密接度が高まり、この部分での密閉性が高くなる。
Further internal pressure of the battery rises, and further increases while pushing up the leading end (1b 1) of the opening tip portion of the sealing body (7) is zinc can (1) (1b), as shown in FIG. 2, the sealing member The lower end of the outer peripheral surface of (7) is the caulked portion (1a) of the zinc can (1)
, The degree of close contact between the outer peripheral surface of the sealing body (7) and the inner peripheral surface of the zinc can (1) decreases, and the outer peripheral surface of the sealing body (7) and the inner peripheral surface of the zinc can (1) decrease. However, on the other hand, in the portion where the groove (7b) is not provided or in the conventional battery shown in FIGS. 5 and 6, the upper surface of the sealing body (7) and the zinc can (1) are formed. ) Of the opening tip portion (1b) and the tip (1b 1 ) of the opening are increased, and the sealing performance at this portion is enhanced.

しかし、本発明の電池では、封口体(7)の上部に、
封口体(7)の外周面から亜鉛缶(1)の開口先端部分
(1b)の先端(1b1)より内周側に達する溝(7b)を設
けているので、この溝(7b)を設けた部分では、封口体
(7)と亜鉛缶(1)の開口先端部分(1b)の先端(1b
1)とが接触せず、隙間があいている。そのため、電池
内部のガスは、封口体(7)の外周面と亜鉛缶(1)の
内周面との間に生じた隙間を通り、さらに封口体(7)
の上部に設けられた溝(7b)を通って電池外部に出てい
くので、電池の内部圧力が低下し、電池の高圧下での破
裂が防止される。
However, in the battery of the present invention, on the upper part of the sealing body (7),
Since the provided sealing body an opening tip portion (1b) of the tip reaches the inner peripheral side of (1b 1) groove (7b) of the zinc can (1) from the outer peripheral surface (7), provided the groove (7b) At the end, the tip (1b) of the opening tip (1b) of the sealing body (7) and the zinc can (1)
1 ) is not in contact with and there is a gap. Therefore, gas inside the battery passes through a gap formed between the outer peripheral surface of the sealing body (7) and the inner peripheral surface of the zinc can (1), and further passes through the sealing body (7).
Since the battery goes out of the battery through the groove (7b) provided in the upper portion of the battery, the internal pressure of the battery is reduced, and the battery is prevented from bursting under high pressure.

〔実施例〕 つぎに実施例をあげて本発明をさらに具体的に説明す
る。
EXAMPLES Next, the present invention will be described more specifically with reference to examples.

実施例1 第1図は本実施例1のマンガン乾電池を示す断面図で
あり、第2図は第1図に示す電池の内部圧力が上昇した
時に電池内部のガスを電池外部に放出する状態を説明す
るための電池の要部拡大断面図である。第3図は第1図
に示す電池に使用された封口体の平面図であり、第4図
は封口体の他の例を示す平面図である。
Example 1 FIG. 1 is a sectional view showing a manganese dry battery of Example 1 and FIG. 2 shows a state in which gas inside the battery is discharged to the outside of the battery when the internal pressure of the battery shown in FIG. 1 increases. FIG. 3 is an enlarged sectional view of a main part of the battery for explaining. FIG. 3 is a plan view of a sealing body used in the battery shown in FIG. 1, and FIG. 4 is a plan view showing another example of the sealing body.

まず、最初に、電池の全体的構造を第1図に基づいて
説明する。
First, the overall structure of the battery will be described with reference to FIG.

図中、(1)は亜鉛缶であり、この亜鉛缶(1)内に
セパレータ(2)、底紙(3)、正極合剤(4)、電解
液および上蓋紙(5)が収容されている。
In the figure, (1) is a zinc can, in which a separator (2), a bottom paper (3), a positive electrode mixture (4), an electrolytic solution and a cover paper (5) are accommodated. I have.

炭素棒(6)の下部は、上蓋紙(5)の中央部を貫通
して正極合剤(4)の内部に達し、炭素棒(6)の上端
部は封口体(7)の中央部の透孔(7a)を貫通して、封
口体(7)より上方に突き出ている。
The lower part of the carbon rod (6) penetrates through the center of the top cover paper (5) to reach the inside of the positive electrode mixture (4), and the upper end of the carbon rod (6) is located at the center of the sealing body (7). It penetrates through the through hole (7a) and protrudes above the sealing body (7).

上蓋紙(5)の上部には、電池内部の密閉性をより高
めるために密閉材層(8)が設けられている。
A sealing material layer (8) is provided on the upper cover paper (5) in order to further improve the sealing performance inside the battery.

封口体(7)は、亜鉛缶(1)の開口部に配置され、
亜鉛缶(1)の封口体(7)との接触部の一部を内方に
かしめることによって環状のかしめ部(1a)が形成さ
れ、このかしめによって封口体(7)は亜鉛缶(1)と
炭素棒(6)との間で局部的に強力に圧縮され、そのか
しめ部(1a)における亜鉛缶(1)の内周面と封口体
(7)の外周面とが密接して亜鉛缶(1)の開口部が封
口され、電池内部が密閉状態に保たれている。
The sealing body (7) is arranged at the opening of the zinc can (1),
An annular caulked portion (1a) is formed by caulking a part of the contact portion of the zinc can (1) with the sealing body (7) inward, and the caulking causes the sealing body (7) to become a zinc can (1). ) And the carbon rod (6) are locally strongly compressed, and the inner peripheral surface of the zinc can (1) and the outer peripheral surface of the sealing body (7) at the caulked portion (1a) are in close contact with each other. The opening of the can (1) is sealed, and the inside of the battery is kept sealed.

亜鉛缶(1)の開口先端部分(1b)は、上記かしめに
先立って内方に折り曲げられ、上記かしめ時に亜鉛缶
(1)の開口先端部分(1b)が外方に広がってかしめ部
(1a)の締付力が低下するのを防止すると共に、封口体
(7)が亜鉛缶(1)の開口部から飛び出すのを防止す
る。そして、上記亜鉛缶(1)の開口先端部分(1b)の
折曲げは、その先端(1b1)が折曲点の頂点(1b2)より
下方に位置するまで、すなわち、その先端(1b1)が下
方ないしは斜め下方を向くまで行われている。
The opening end portion (1b) of the zinc can (1) is bent inward prior to the above-mentioned swaging, and the opening end portion (1b) of the zinc can (1) spreads outward during the swaging to form a swaging portion (1a). ) Is prevented from lowering and the sealing body (7) is prevented from jumping out of the opening of the zinc can (1). The folding of the opening tip portion (1b) of the zinc can (1) bending until its tip (1b 1) is located below the apex of the bending points (1b 2), i.e., the front end (1b 1 ) Is directed downward or obliquely downward.

炭素棒(6)の頭部には正極端子板(9)が嵌着さ
れ、この正極端子板(9)の周縁部は封口体(7)内に
食い込むことによって、正極端子板(9)が固定されて
いる。
A positive electrode terminal plate (9) is fitted to the head of the carbon rod (6), and the periphery of the positive electrode terminal plate (9) is cut into the sealing body (7), so that the positive electrode terminal plate (9) is inserted. Fixed.

亜鉛缶(1)の底部には負極端子板(10)が配設さ
れ、亜鉛缶(1)の外周部には外装材(11)が装着さ
れ、該外装材(11)によって亜鉛缶(1)の外周面と負
極端子板(10)の底部周縁部が被覆されている。
A negative electrode terminal plate (10) is provided at the bottom of the zinc can (1), and an outer package (11) is attached to the outer periphery of the zinc can (1). ) And the bottom peripheral edge of the negative electrode terminal plate (10).

上記外装材(11)は、熱吸縮性樹脂チューブまたは樹
脂ラベルからなるが、この実施例では、塩化ビニル樹脂
製の熱吸縮性樹脂チューブの表面に所定事項(例えば、
商品名、製造業者名、取扱注意事項など)を印刷し、ラ
ベルとしての役目を兼ねさせるようにしたものが外装材
(11)として用いられている。
The exterior material (11) is made of a heat-shrinkable resin tube or a resin label. In this embodiment, predetermined items (for example,
A product printed with a product name, a manufacturer name, handling precautions, and the like, and also serving as a label is used as the exterior material (11).

そして、封口体(7)の上部には、その外周面から亜
鉛缶(1)の開口先端部分(1b)の先端(1b1)より内
周側に達する溝(7b)が設けられている。
Then, the upper part of the sealing body (7), the opening tip portion (1b) of the tip groove reaching the inner circumferential side of (1b 1) of the zinc can (1) (7b) is provided from the outer peripheral surface.

上記溝(7b)は、本実施例では、第3図に示すよう
に、封口体(7)の上部に等間隔に3箇所設けられてい
るが、この溝(7b)は、1箇所以上設けておけばよく、
例えば、第4図に示すように、4箇所設けてもよい。
In the present embodiment, as shown in FIG. 3, three grooves (7b) are provided at equal intervals above the sealing body (7), but one or more grooves (7b) are provided. Just leave it
For example, as shown in FIG. 4, four locations may be provided.

上記溝(7b)は、一般に、深さ0.3〜0.6mmで、幅0.5
〜2.0mm、長さ〔封口体(7)の外周面から内周側端部
までの長さ〕1.0〜1.5mmの範囲で設ければよいが、本実
施例では、深さを0.5mm、幅を1.5mm、長さを1.2mmにし
ている。
The groove (7b) is generally 0.3 to 0.6 mm deep and 0.5 mm wide.
~ 2.0 mm, length [the length from the outer peripheral surface to the inner peripheral end of the sealing body (7)] may be provided in the range of 1.0 to 1.5 mm. In this embodiment, the depth is 0.5 mm, The width is 1.5mm and the length is 1.2mm.

また、封口体(7)の外径と亜鉛缶(1)の内径との
間には、亜鉛缶(1)の開口部への封口体(7)の挿入
が可能なように、0.01〜0.3mm程度(本実施例では0.07m
m)の隙間があくように設定されていて、かしめ部(1
a)のところで封口体(7)の外周面と亜鉛缶(1)の
内周面とが密接して密閉性が確保されている。
Further, between the outer diameter of the sealing body (7) and the inner diameter of the zinc can (1), 0.01 to 0.3 to allow the insertion of the sealing body (7) into the opening of the zinc can (1). mm (in this example, 0.07m
m) is set so that there is a gap, and the caulking part (1
At (a), the outer peripheral surface of the sealing body (7) and the inner peripheral surface of the zinc can (1) are in close contact with each other to ensure hermeticity.

この電池では、電池が正常な状態にあって、その内部
圧力が上昇していない場合には、第1図に示すように、
亜鉛缶(1)のかしめ部(1a)のところで封口体(7)
が強く圧縮されて高い密閉性が確保されている。
In this battery, when the battery is in a normal state and its internal pressure has not increased, as shown in FIG.
Sealing body (7) at caulking part (1a) of zinc can (1)
Is strongly compressed to ensure high hermeticity.

しかし、充電によって電池の内部の内部圧力が上昇し
た場合には、封口体(7)が押し上げられ、溝(7b)を
設けていない部分では、封口体(7)の上面が亜鉛缶
(1)の開口先端部分(1b)の先端(1b1)に密接す
る。
However, when the internal pressure inside the battery rises due to charging, the sealing body (7) is pushed up, and in a portion where the groove (7b) is not provided, the upper surface of the sealing body (7) is covered with the zinc can (1). Close to the tip (1b 1 ) of the tip (1b) of the opening.

さらに電池の内部圧力が上昇すると、封口体(7)が
亜鉛缶(1)の開口先端部分(1b)の先端(1b1)を押
し上げつつさらに上昇し、第2図に示すように、封口体
(7)の外周面の下端が亜鉛缶(1)のかしめ部(1a)
を通り越して、封口体(7)の外周面と亜鉛缶(1)の
内周面との間の密接度が低下し、封口体(7)の外周面
と亜鉛缶(1)の内周面との間に微細な隙間が生じるよ
うになるが、その反面、溝(7b)を設けていない部分で
は、封口体(7)の上面と亜鉛缶(1)の開口先端部分
(1b)の先端(1b1)との密接度が高まり、この部分で
の気密性が高くなる。そのため、封口体(7)の上部に
溝(7b)を設けていない従来電池では、電池の内部圧力
が増々高くなって、ついては電池が破裂するようになる
が、本発明の電池では、封口体(7)の上部に、その外
周面から亜鉛缶(1)の開口先端部分(1b)の先端(1b
1)より内周側に達する溝(7b)が設けられているの
で、この溝(7b)が設けられた部分では封口体(7)の
上面と亜鉛缶(1)の開口先端部分(1b)の先端(1
b1)とが接触せず、隙間があいているので、電池内部の
ガスは、上記封口体(7)の外周面と亜鉛缶(1)の内
周面との間に生じた隙間を通り、さらに封口体(7)の
上部に設けられた溝(7b)を通って電池外部に出て行
き、電池の内部圧力が低下して、電池の高圧下での破裂
が防止される。
Further internal pressure of the battery rises, and further increases while pushing up the leading end (1b 1) of the opening tip portion of the sealing body (7) is zinc can (1) (1b), as shown in FIG. 2, the sealing member The lower end of the outer peripheral surface of (7) is the caulked portion (1a) of the zinc can (1)
, The degree of close contact between the outer peripheral surface of the sealing body (7) and the inner peripheral surface of the zinc can (1) decreases, and the outer peripheral surface of the sealing body (7) and the inner peripheral surface of the zinc can (1) decrease. However, on the other hand, in the portion where the groove (7b) is not provided, the top surface of the sealing body (7) and the tip of the opening tip portion (1b) of the zinc can (1) are formed. increased closeness between (1b 1), airtightness in this portion becomes high. Therefore, in the conventional battery in which the groove (7b) is not provided in the upper portion of the sealing body (7), the internal pressure of the battery is further increased, and the battery is ruptured. At the top of (7), the tip (1b) of the opening tip (1b) of the zinc can (1)
1 ) Since the groove (7b) reaching the inner peripheral side is provided, the upper surface of the sealing body (7) and the opening end portion (1b) of the zinc can (1) are provided at the portion where the groove (7b) is provided. The tip (1
b 1) and does not contact, the gap is free of gas inside the battery, through a gap formed between the outer peripheral surface and the inner circumferential surface of the zinc can (1) of the sealing body (7) Further, the battery goes out of the battery through the groove (7b) provided at the upper part of the sealing body (7), and the internal pressure of the battery is reduced, thereby preventing the battery from being ruptured under high pressure.

比較例1 第5図に示すような従来構成のマンガン乾電池を作製
した。
Comparative Example 1 A conventional manganese dry battery as shown in FIG. 5 was produced.

すなわち、この比較例1の電池は、封口体(7)の上
部に溝(7b)を設けていない。しかし、上記以外の構成
は実施例1と同様である。
That is, in the battery of Comparative Example 1, the groove (7b) was not provided in the upper part of the sealing body (7). However, the configuration other than the above is the same as that of the first embodiment.

上記実施例1の電池および比較例1の電池を各20個ず
つ50mAの定電流で充電して、破裂が生じる電池個数を調
べた。その結果を第1表に破裂発生率で示す。
The battery of Example 1 and the battery of Comparative Example 1 were each charged at a constant current of 50 mA, 20 batteries each, and the number of batteries that could burst was determined. The results are shown in Table 1 as burst occurrence rates.

第1表に示すように、本発明の実施例1の電池は、破
裂を起こすものがまったくなく、たとえ誤使用により充
電されることがあっても破裂が生じず、安全性の高いこ
とが明らかにされた。
As shown in Table 1, it is clear that the battery of Example 1 of the present invention has no rupture, does not rupture even if it is charged due to misuse, and is highly safe. Was.

なお、上記の実施例では、外装材(11)として熱吸縮
性樹脂チューブを用いたが、それに代えて、樹脂ラベル
を外装材(11)として用いてもよい。そのような樹脂ラ
ベルとしては、例えば、樹脂シートの表面に所定事項を
印刷し、裏面に感圧性接着剤をコーティングしたもの
や、あるいは樹脂シートの裏面にアルミニウム蒸着膜な
どの金属薄層を設け、その金属薄層上に感圧性接着剤を
コーティングしたものなどが用いられる。本発明におい
て外装材(11)として用いる熱吸縮性樹脂チューブまた
は樹脂は、通常、樹脂製の外装材と呼ばれているが、上
記例示からも明らかなように、樹脂を主材として作製さ
れているものであればよく、樹脂のみで作製されている
ことを要求されるものではない。
In the above embodiment, a heat-shrinkable resin tube is used as the exterior material (11), but a resin label may be used as the exterior material (11) instead. As such a resin label, for example, a predetermined matter is printed on the surface of a resin sheet and a pressure-sensitive adhesive is coated on the back surface, or a thin metal layer such as an aluminum vapor-deposited film is provided on the back surface of the resin sheet, A metal thin layer coated with a pressure-sensitive adhesive is used. In the present invention, the heat-shrinkable resin tube or resin used as the exterior material (11) is usually called a resin exterior material, but as is clear from the above examples, the resin is used as a main material. And it is not required to be made only of resin.

また、上記実施例では、封口体(7)の上面と亜鉛缶
(1)の開口先端部分(1b)の先端(1b1)との間に隙
間がないものについて例示したが、封口体(7)の上面
と亜鉛缶(1)の開口先端部分(1b)の先端(1b1)と
の間に若干の隙間があいたものであってもよい。すなわ
ち、封口体(7)の上面と亜鉛缶(1)の開口先端部分
(1b)の先端(1b1)との間に隙間がないものの場合
は、電池の内部圧力が上昇して、封口体(7)が上方に
押し上げられ、その外周面の下端が亜鉛缶(1)のかし
め部(1a)を通り越すまでの間、亜鉛缶(1)の開口先
端部分(1b)が折曲状態を保ち、封口体(7)が亜鉛缶
(1)の開口部から外部に飛び出すのを防止できるよう
に亜鉛缶(1)の封口体(7)の上面より上方の部分の
寸法設定がなされておればよいし、また、封口体(7)
の上面と亜鉛缶(1)の開口先端部分(1b)の先端(1b
1)との間に隙間があいているものの場合は、その隙間
を含めて上記の寸法設定がなされておればよい。
In the above embodiment, has been illustrated that there is no gap between the tip of the upper surface and the opening tip portion of the zinc can (1) of the sealing body (7) (1b) (1b 1), sealing body (7 or it may be a slight gap is perforated between the tip (1b 1) of the top and the opening tip portion of the zinc can (1) of (1b)). That is, when although there is no gap between the tip of the upper surface and the opening tip portion of the zinc can (1) of the sealing body (7) (1b) (1b 1) is to increase the internal pressure of the battery, sealing member (7) is pushed upward, and the opening end portion (1b) of the zinc can (1) keeps a bent state until the lower end of the outer peripheral surface passes through the caulked portion (1a) of the zinc can (1). If the dimensions of the portion above the upper surface of the sealing body (7) of the zinc can (1) are set so that the sealing body (7) can be prevented from jumping out of the opening of the zinc can (1) to the outside. Good, and sealing body (7)
Of the opening of the zinc can (1) and the tip (1b) of the zinc can (1)
In the case where there is a gap between 1 ) and the above, it is sufficient that the above dimensions are set including the gap.

また、上記実施例では、上蓋紙(5)上に密閉材層
(8)を設けたものを例示したが、この密閉材層(8)
は必ずしも必要なものではないし、底紙(3)、上蓋紙
(5)などは、絶縁材として役立つものであれば、その
材質は紙以外のものであってもよい。
Further, in the above embodiment, the sealing material layer (8) is provided on the top cover paper (5), but the sealing material layer (8) is provided.
Is not always necessary, and the base paper (3), the top cover paper (5) and the like may be made of a material other than paper as long as they serve as an insulating material.

〔発明の効果〕〔The invention's effect〕

以上説明したように、本発明では、封口体(7)の上
部に、封口体(7)の外周面から亜鉛缶(1)の開口先
端部分(1b)の先端(1b1)より内周側に達する溝(7
b)を設けることによって、誤って充電されたときでも
電池が破裂するのを防止し、誤使用に対する電池の安全
性を高めることができた。
As described above, in the present invention, the upper part of the sealing body (7), the inner peripheral side of the tip (1b 1) of the opening tip portion (1b) of the zinc can (1) from the outer peripheral surface of the sealing body (7) Groove reaching (7
By providing b), it was possible to prevent the battery from being ruptured even when charged erroneously, and to enhance the safety of the battery against misuse.

【図面の簡単な説明】[Brief description of the drawings]

第1図は本発明の実施例1のマンガン乾電池を示す断面
図である。第2図は第1図に示す電池の内部圧力が上昇
した時に電池内部のガスを電池外部に放出する状態を説
明するための電池の要部拡大断面図である。第3図は第
1図に示す電池に使用された封口体を示す平面図であ
り、第4図は本発明のマンガン乾電池に使用する封口体
の他の例を示す平面図である。第5図は従来のマンガン
乾電池を示す断面図である。第6図は第5図に示す電池
の内部圧力が上昇した時の状態を説明するための電池の
要部拡大断面図である。 (1)……亜鉛缶、(1a)……かしめ部、(1b)……開
口先端部分、(1b1)……先端、(1b2)……頂点、
(2)……セパレータ、(4)……正極合剤、(6)…
…炭素棒、(7)封口体……、(7a)……透孔、(7b)
……溝、(11)……外装材、
FIG. 1 is a sectional view showing a manganese dry battery according to Embodiment 1 of the present invention. FIG. 2 is an enlarged sectional view of a main part of the battery for explaining a state in which gas inside the battery is released to the outside of the battery when the internal pressure of the battery shown in FIG. 1 increases. FIG. 3 is a plan view showing a sealing body used for the battery shown in FIG. 1, and FIG. 4 is a plan view showing another example of the sealing body used for the manganese dry battery of the present invention. FIG. 5 is a sectional view showing a conventional manganese dry battery. FIG. 6 is an enlarged sectional view of a main part of the battery for explaining a state when the internal pressure of the battery shown in FIG. 5 has increased. (1) ... zinc can, (1a) .... caulked portion, (1b) ...... opening tip portion, (1b 1) ... tip, (1b 2) ...... vertices,
(2) ... separator, (4) ... positive electrode mixture, (6) ...
… Carbon rod, (7) Sealing body…, (7a)… Pore, (7b)
... groove, (11) ... exterior material,

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】亜鉛缶(1)と、セパレータ(2)と、正
極合剤(4)と、電解液と、炭素棒(6)と、封口体
(7)と、熱吸縮性樹脂チューブまたは樹脂ラベルから
なる外装材(11)を有し、 上記セパレータ(2)、正極合剤(4)および電解液
は、亜鉛缶(1)内に収容され、 上記封口体(7)は、亜鉛缶(1)の開口部に配置さ
れ、封口体(7)の中央部の透孔(7a)には、炭素棒
(6)の上端部が貫通し、 上記亜鉛缶(1)の開口先端部分(1b)は、内方に折り
曲げられ、かつ、その先端(1b1)は折曲部の頂点(1
b2)より下方に位置し、 上記亜鉛缶(1)には、その封口体(7)との接触部の
一部を内方にかしめることによって環状のかしめ部(1
a)が形成され、上記かしめ部(1a)における亜鉛缶
(1)の内周面と封口体(7)の外周面とが密接して亜
鉛缶(1)の開口部が封口され、 上記亜鉛缶(1)の外周部には、熱吸縮性樹脂チューブ
または樹脂ラベルからなる外装材(11)が装着されてい
るマンガン乾電池において、 封口体(7)の上部に、封口体(7)の外周面から亜鉛
缶(1)の開口先端部分(1b)の先端(1b1)より内周
側に達する溝(7b)を設けたことを特徴とする、 マンガン乾電池。
1. A zinc can (1), a separator (2), a positive electrode mixture (4), an electrolyte, a carbon rod (6), a sealing body (7), and a heat-shrinkable resin tube. Or, it has an exterior material (11) made of a resin label, the separator (2), the positive electrode mixture (4) and the electrolyte are accommodated in a zinc can (1), and the sealing body (7) is made of zinc. The upper end of the carbon rod (6) is disposed at the opening of the can (1), and penetrates the through hole (7a) at the center of the sealing body (7). (1b) is bent inward, and its tip (1b 1 ) is at the vertex (1b)
b 2 ) The annular canister (1) is located below the zinc can (1) by caulking a part of the contact portion with the sealing body (7) inward.
a) is formed, and the inner peripheral surface of the zinc can (1) and the outer peripheral surface of the sealing body (7) in the caulking portion (1a) are in close contact with each other, and the opening of the zinc can (1) is sealed. In a manganese dry battery in which a casing (11) made of a heat-shrinkable resin tube or a resin label is attached to the outer periphery of the can (1), the sealing body (7) is placed on top of the sealing body (7). characterized in that an opening tip portion (1b) of the tip groove reaching the inner circumferential side of (1b 1) of the zinc can (1) from an outer peripheral surface (7b), manganese dry cell.
JP2074663A 1990-03-23 1990-03-23 Manganese dry cell Expired - Fee Related JP2825921B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2074663A JP2825921B2 (en) 1990-03-23 1990-03-23 Manganese dry cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2074663A JP2825921B2 (en) 1990-03-23 1990-03-23 Manganese dry cell

Publications (2)

Publication Number Publication Date
JPH03274659A JPH03274659A (en) 1991-12-05
JP2825921B2 true JP2825921B2 (en) 1998-11-18

Family

ID=13553701

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2074663A Expired - Fee Related JP2825921B2 (en) 1990-03-23 1990-03-23 Manganese dry cell

Country Status (1)

Country Link
JP (1) JP2825921B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2986656B1 (en) * 2012-02-07 2017-07-28 Batscap Sa DEVICE AND METHOD FOR MANUFACTURING AN ELECTRIC ENERGY STORAGE ASSEMBLY

Also Published As

Publication number Publication date
JPH03274659A (en) 1991-12-05

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