JPH0641338Y2 - Cylindrical battery - Google Patents
Cylindrical batteryInfo
- Publication number
- JPH0641338Y2 JPH0641338Y2 JP1989066599U JP6659989U JPH0641338Y2 JP H0641338 Y2 JPH0641338 Y2 JP H0641338Y2 JP 1989066599 U JP1989066599 U JP 1989066599U JP 6659989 U JP6659989 U JP 6659989U JP H0641338 Y2 JPH0641338 Y2 JP H0641338Y2
- Authority
- JP
- Japan
- Prior art keywords
- battery
- plate
- metal
- outer peripheral
- opening
- 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
Links
Classifications
-
- Y02E60/12—
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Secondary Cells (AREA)
Description
【考案の詳細な説明】 〈産業上の利用分野〉 この考案は、発電要素を収納した円筒状の電池缶の開口
部を端子板や絶縁ガスケットなどを組合わせて封口して
構成される、筒形電池に関するものである。[Detailed Description of the Invention] <Industrial Application Field> This invention is a cylinder formed by sealing the opening of a cylindrical battery can containing a power generation element in combination with a terminal plate, an insulating gasket and the like. Shaped battery.
〈従来の技術〉 スパイラル形リチウム電池やインサイドアウト形リチウ
ム電池、あるいは円筒形Ni-Cd蓄電池などの筒形電池で
は、発電要素を収納した円筒状の電池缶の開口部に形成
したビーディング部により環状の絶縁ガスケットを支持
し、この絶縁ガスケットの上に端子板などの封口部材を
載置し、また内側にかしめた電池缶開口部と端子板周縁
部の間でこの絶縁ガスケットを挟持することで電池を封
口する形式が広く用いられている。<Prior art> For cylindrical batteries such as spiral type lithium batteries, inside-out type lithium batteries, and cylindrical Ni-Cd storage batteries, the beading part formed in the opening of the cylindrical battery can that houses the power generation element is used. By supporting an annular insulating gasket, placing a sealing member such as a terminal plate on this insulating gasket, and sandwiching this insulating gasket between the battery can opening caulked inside and the terminal plate peripheral edge. The form of sealing the battery is widely used.
これらの電池では、外部短絡や過充電などにより電池内
部に発生した多量のガスにより電池内圧が異常に上昇し
た場合、電池缶開口部に設けた防爆機構により、この異
常内圧を電池外部に放出して電池の変形や破裂などを防
ぐ構造が用いられている。With these batteries, if the internal pressure of the battery rises abnormally due to a large amount of gas generated inside the battery due to an external short circuit or overcharging, this abnormal internal pressure is released to the outside of the battery by the explosion-proof mechanism installed at the opening of the battery can. The structure is used to prevent deformation and rupture of the battery.
この種の防爆構造として、例えばスパイラル形リチウム
電池の場合、第3図に示した通り、薄肉金属製の封口板
11,並びにこの封口板11に向かう切刃12a及びガス抜き孔
12bを設けた端子板12を電池缶13の開口部に設け、電池
の異常内圧により膨出した封口板11を上記切刃12aによ
りつき通して穴をあけ、この穴を介して異常内圧を電池
外部に逃がすように設計される。As an explosion-proof structure of this type, for example, in the case of a spiral lithium battery, as shown in FIG. 3, a sealing plate made of a thin metal is used.
11, and a cutting edge 12a and a gas vent hole facing the sealing plate 11.
The terminal plate 12 provided with 12b is provided in the opening of the battery can 13, and the sealing plate 11 bulging due to the abnormal internal pressure of the battery is penetrated by the cutting blade 12a to make a hole, and the abnormal internal pressure is supplied to the battery through this hole. Designed to escape to the outside.
一方、特にスパイラル形リチウム電池の場合、外部短絡
に伴う電池内部からの発熱により電池温度が急激に上昇
して電池が発火するなどの虞があるため、発電要素の一
方の電極とその電極端子との間にPTC素子を設け、このP
TC素子により短絡時の電流制限を行う構成が用いられる
ことがある。On the other hand, especially in the case of a spiral lithium battery, there is a risk that the battery temperature will rise rapidly due to heat generation from the inside of the battery due to an external short circuit, and the battery will ignite. PTC element is installed between
A configuration that limits the current at the time of a short circuit by the TC element may be used.
〈考案が解決しようとする課題〉 しかしながら、電池缶開口部に形成したビーディング部
上に絶縁ガスケットを載置する上記形式の電池では、発
電要素をこのビーデイング部より下側に設けなければな
らないし、更に上記のような防爆構造を電池缶開口部に
具備させればその部分に内部空間が大きくとられること
から、結果として電池内に収納し得る発電要素の容積が
抑えられ、放電容量が制限されてしまう。<Problems to be solved by the invention> However, in the battery of the above type in which the insulating gasket is placed on the beading portion formed in the opening of the battery can, the power generating element must be provided below the beading portion. Furthermore, if the battery can opening is provided with the above explosion-proof structure, a large internal space is provided in that part, so that the capacity of the power generation element that can be accommodated in the battery is suppressed and the discharge capacity is limited. Will be done.
特に、電池の外部短絡時における発熱を抑えるために上
記のようにPTC素子を更に具備させた場合にはこの傾向
が一層高まる。In particular, when the PTC element is further provided as described above in order to suppress heat generation when the battery is externally short-circuited, this tendency is further enhanced.
この考案は、電池缶開口部に上記のような防爆構造並び
にPTC素子を容量効率よく収納することで、外部短絡や
充電による爆発や破裂などを確実に防止することができ
て安全性が高く、且つ内部容積のロスが少なくて高容量
とできる筒形電池を提供することを目的とする。This device has high safety because it can prevent explosion or rupture due to external short circuit or charging by storing the above explosion-proof structure and PTC element in the battery can opening with good capacity efficiency. Moreover, it is an object of the present invention to provide a tubular battery which has a high capacity and a small loss of internal volume.
〈課題を解決するための手段〉 この考案の筒形電池は、中央に透孔を有する金属板の外
周折返し部により金属薄板または金属−合成樹脂ラミネ
ート薄板の周囲を挟持し、またこの金属板の外周折返し
部の上側外面にリング状のPTC素子を介してガス抜き孔
及び切刃を有する端子板の外周部を載置し、更にこれら
金属板,PTC素子並びに端子板の外周部を、絶縁ガスケッ
トを介して、発電要素を収納した電池缶の開口部にシー
ム溶接で設けた封口板の内周端部に一体形成または溶接
した、断面コの字状の部材により挟持してなることを要
旨とする。<Means for Solving the Problems> In the cylindrical battery of the present invention, a metal thin plate or a metal-synthetic resin laminate thin plate is sandwiched by the outer peripheral folded portion of a metal plate having a through hole in the center, and the metal plate Place the outer peripheral part of the terminal plate having the gas venting hole and the cutting edge on the upper outer surface of the outer peripheral folded part through the ring-shaped PTC element, and further install the metal plate, the PTC element and the outer peripheral part of the terminal plate on the insulating gasket. Via the through, the battery can containing the power generation element is integrally formed or welded to the inner peripheral end of the sealing plate provided by seam welding at the opening, and is sandwiched by members having a U-shaped cross section. To do.
上記の金属薄板としては、ステンレス薄板やアルミニウ
ム薄板,チタン薄板などを用いることができる。また金
属−合成樹脂ラミネート薄板には、これらの金属薄板の
表面に合成樹脂を積層ないしコーテイングしたものを用
いれば良い。As the metal thin plate, a stainless thin plate, an aluminum thin plate, a titanium thin plate, or the like can be used. As the metal-synthetic resin laminate thin plate, those obtained by laminating or coating the surface of these metal thin plates with synthetic resin may be used.
また、これら金属薄膜または金属−合成樹脂ラミネート
薄板と金属板とを、上記挟持部分においてホットメルト
樹脂により接着するようにしても良い。In addition, the metal thin film or the metal-synthetic resin laminate thin plate and the metal plate may be bonded to each other in the sandwiched portion by hot melt resin.
〈作用〉 上記のように電池缶開口部に設けた封口板の内周端に設
けた断面コの字状の部材内に、金属薄膜または金属−合
成樹脂ラミネート薄板と端子板とで構成される防爆構造
並びにPTC素子を設けた封口部分を形成することで、電
池缶開口部にこれら防爆構造並びにPTC素子が容量効率
よく収納されて電池の内部容積のロスを小さく抑えるこ
とができるようになる。<Operation> A metal thin film or a metal-synthetic resin laminate thin plate and a terminal plate are formed in a member having a U-shaped cross section provided at the inner peripheral end of the sealing plate provided at the opening of the battery can as described above. By forming the sealing portion provided with the explosion-proof structure and the PTC element, the explosion-proof structure and the PTC element can be stored in the opening of the battery can with high capacity efficiency, and the loss of the internal volume of the battery can be suppressed to be small.
そして、過充電などにより電池内圧が上昇した場合は上
記防爆構造により、また外部短絡により電池が発熱した
場合には上記PTC素子により短絡電流が制限されて、電
池の破裂や発火等が確実に防止できる。When the internal pressure of the battery rises due to overcharging, etc., the above-mentioned explosion-proof structure limits the short-circuit current by the PTC element when the battery heats up due to an external short circuit. it can.
〈実施例〉 以下に実施例を説明する。<Examples> Examples will be described below.
第1図において、発電要素1を収納した有底円筒状の電
池缶2の開口部周縁には、厚さ0.2mm程度のステンレス
薄板で作られた皿状で環状の封口板3の外周立上り部の
周縁がシーム溶接,溶接あるいは抵抗溶接などで連続溶
接されている。この封口板3の内周端には、厚さ0.25mm
のステンレス薄板を用いた断面コの字状の部材4の内周
端が同様に溶接されている。尚、この断面コの字状の部
材4を、封口板3の内周部分を折曲するなどしてこの封
口板内周に一体形成しても良い。In FIG. 1, the outer peripheral rising portion of a plate-shaped annular sealing plate 3 made of a stainless steel plate having a thickness of about 0.2 mm is provided around the opening of a bottomed cylindrical battery can 2 accommodating the power generation element 1. The periphery of the is welded continuously by seam welding, welding or resistance welding. The inner peripheral edge of this sealing plate 3 has a thickness of 0.25 mm.
Similarly, the inner peripheral edge of the member 4 having a U-shaped cross section using the stainless thin plate is welded. The member 4 having a U-shaped cross section may be formed integrally with the inner periphery of the sealing plate 3 by bending the inner peripheral portion of the sealing plate 3.
一方、中央に透孔5aを有する厚さ0.25mmのステンレス薄
板で作られた金属板5の外周折返し部5bにより、合成樹
脂封口体6,並びに厚さ50μmのポリプロピレン−アルミ
ニウムラミネートフィルムで作った金属−合成樹脂ラミ
ネート薄板7の外周部が挟持されている。この金属−合
成樹脂ラミネート薄板7の下面と上記外周折返し部5bと
はホットメルト樹脂により接着されている。On the other hand, the outer peripheral folded-back portion 5b of the metal plate 5 made of a stainless steel plate having a thickness of 0.25 mm having the through hole 5a in the center, the synthetic resin sealing body 6, and a metal made of a polypropylene-aluminum laminated film having a thickness of 50 μm. -The outer peripheral portion of the synthetic resin laminate thin plate 7 is clamped. The lower surface of the metal-synthetic resin laminate thin plate 7 and the outer peripheral folded-back portion 5b are bonded together by hot melt resin.
また、この金属板5の外周折返し部5bの上側外面には、
厚さ0.4mm程度のリング状のPTC素子8を介して、ガス抜
き孔9a及び切刃9bを有しまた端子表面がニッケルメッキ
された厚さ0.25mmのステンレス薄板で作った端子板9の
外周部が載置されている。更に、以上の金属板5,PTC素
子8,並びに端子板9の外周部は、絶縁ガスケット10を介
して、上記の断面コの字状部材4により圧迫・挟持され
ている。Further, on the upper outer surface of the outer peripheral folded-back portion 5b of the metal plate 5,
Outer circumference of the terminal plate 9 made of a 0.25 mm-thick stainless steel thin plate having a gas vent hole 9a and a cutting edge 9b through a ring-shaped PTC element 8 having a thickness of approximately 0.4 mm, and the surface of the terminal being nickel-plated. Section is placed. Further, the metal plate 5, the PTC element 8, and the outer peripheral portion of the terminal plate 9 are pressed and sandwiched by the above-mentioned member 4 having a U-shaped cross section through the insulating gasket 10.
上記PTC素子8としては、温度上昇によりその抵抗値が
急上昇する正温度係数抵抗特性を持つ導電性樹脂層の両
面に、金属メッキ層や金属薄箔などを設けて構成される
厚さ0.4mm程度のものを用いれば良い。The PTC element 8 has a thickness of about 0.4 mm, which is formed by providing a metal plating layer or a thin metal foil on both surfaces of a conductive resin layer having a positive temperature coefficient resistance characteristic, the resistance value of which increases sharply as the temperature rises. You can use the one.
そして、電池缶開口部を以上の構造として、単3サイズ
のスパイラル形リチウム電池(本考案電池)を作製し
た。一方、電池缶開口部を第3図の構造とした他は同様
にして、同じく単3サイズの筒形リチウム電池(従来電
池)を作製した。これらの電池について、各電池を外部
短絡させ、短絡後の電池表面温度(℃)の時間変化をそ
れぞれ調べた。Then, an AA size spiral lithium battery (the battery of the present invention) was produced with the battery can opening having the above structure. On the other hand, an AA-sized cylindrical lithium battery (conventional battery) was prepared in the same manner except that the battery can opening had the structure shown in FIG. With respect to these batteries, each battery was externally short-circuited, and the time change of the battery surface temperature (° C.) after the short circuit was examined.
第2図はこの結果を示したもので、点線で示した従来電
池では短絡後5〜6分経過した時点で電池温度が160℃
以上に達して電池が発火したのに対し、実線で示した本
考案電池の場合は電池温度の上昇は僅かで、ショートし
てから10分経過後でも電池温度は70℃程度に抑えられて
いる。Figure 2 shows this result. In the conventional battery shown by the dotted line, the battery temperature is 160 ° C at 5 to 6 minutes after the short circuit.
In contrast to the above, the battery ignited, but in the case of the battery of the present invention shown by the solid line, the temperature rise of the battery was slight, and the battery temperature was suppressed to about 70 ° C even 10 minutes after the short circuit. .
ところで、本考案電池の場合、封口板3から端子板9ま
での高さは2〜2.5mmに過ぎない。これに対し従来電池
では、封口板11から端子板12までの高さは3.5〜4mmであ
り且つ絶縁ガスケット14を載置するためのビーディング
部を設けたために更に1.5〜2mm程度高さがとられてしま
う。By the way, in the case of the battery of the present invention, the height from the sealing plate 3 to the terminal plate 9 is only 2 to 2.5 mm. On the other hand, in the conventional battery, the height from the sealing plate 11 to the terminal plate 12 is 3.5 to 4 mm, and since the beading portion for mounting the insulating gasket 14 is provided, the height is further increased to about 1.5 to 2 mm. I will be lost.
従って、電池缶開口部を本考案電池の構造とすれば、従
来電池より3mm程度発電要素の高さをとることができる
から、その分発電要素の収納量の増大を図ることができ
る。即ち、本考案電池では電池缶内部に収納し得る発電
要素の収納体積が従来電池に比べて10%程度多く、その
分放電性能の向上を図ることができる。Therefore, if the opening of the battery can has the structure of the battery of the present invention, the height of the power generating element can be set to about 3 mm higher than that of the conventional battery, so that the storage amount of the power generating element can be increased accordingly. That is, in the battery of the present invention, the storage volume of the power generation element that can be stored inside the battery can is about 10% larger than that of the conventional battery, and the discharge performance can be improved accordingly.
〈考案の効果〉 以上のように、この考案の筒形電池によれば、電池の外
部短絡時や充電時における電池の破裂発熱等を確実に防
止できるとともに、そのための防爆構造並びにPTC素子
を電池缶開口部に容量効率よく収納できるので電池の内
部容積のロスを小さく抑えることができ、その分発電要
素の収納量の増大を図ることができる。<Effects of the Invention> As described above, according to the cylindrical battery of the present invention, it is possible to reliably prevent the burst heat generation of the battery when the battery is externally short-circuited or charged, and to provide an explosion-proof structure and a PTC element for the battery. Since it can be stored in the can opening portion with high capacity efficiency, the loss of the internal volume of the battery can be suppressed to a small extent, and the storage amount of the power generation element can be increased accordingly.
その他、断面コの字状の部材により金属板などの外周部
を挟持することにより封口部を構成したので、この封口
部の設計の自由度が大きくなり、また封口部を1部品と
して組立てられるようになり、この結果、この封口部に
おける部材締付けを十分に行えるようになるといった効
果を奏する。Besides, since the sealing portion is configured by sandwiching the outer peripheral portion of the metal plate or the like by the member having a U-shaped cross section, the degree of freedom in designing the sealing portion is increased, and the sealing portion can be assembled as one part. As a result, there is an effect that the member can be sufficiently tightened in the sealing portion.
第1図は実施例の電池の要部断面図、第2図は電池外部
短絡時における電池表面温度の経時変化を示したグラ
フ、第3図は従来の電池の要部断面図である。 1,15……発電要素、2,13……電池缶、3,11……封口板、
5……金属板、8……PTC素子、9,12……端子板、10,14
……絶縁ガスケット、1a,15a……リード板。FIG. 1 is a cross-sectional view of an essential part of the battery of the embodiment, FIG. 2 is a graph showing a time-dependent change of the battery surface temperature when the battery is short-circuited to the outside, and FIG. 1,15 …… power generation element, 2,13 …… battery can, 3,11 …… sealing plate,
5 ... Metal plate, 8 ... PTC element, 9,12 ... Terminal plate, 10,14
...... Insulation gasket, 1a, 15a ...... Lead plate.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 原田 吉郎 東京都港区新橋5丁目36番11号 富士電気 化学株式会社内 (72)考案者 中西 正典 東京都港区新橋5丁目36番11号 富士電気 化学株式会社内 (72)考案者 名倉 秀哲 東京都港区新橋5丁目36番11号 富士電気 化学株式会社内 (56)参考文献 実開 昭64−5360(JP,U) 実開 昭59−3476(JP,U) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoshiro Harada, 5-16-11 Shimbashi, Minato-ku, Tokyo Fuji Electric Chemical Co., Ltd. (72) Masanori Nakanishi 5-36-11 Shinbashi, Minato-ku, Tokyo Fuji Electrochemical Co., Ltd. (72) Inventor Hidetetsu Nagura, 5-16-11, Shimbashi, Minato-ku, Tokyo Fuji Electric Chemical Co., Ltd. (56) References: Development 64-65 (JP, U) Development 59- 3476 (JP, U)
Claims (1)
外周折返し部により金属薄板または金属−合成樹脂ラミ
ネート薄板(7)の周囲を挟持し、 またこの金属板の外周折返し部の上側外面にリング状の
PTC素子(8)を介してガス抜き孔(9a)及び切刃(9
b)を有する端子板(9)の外周部を載置し、 更にこれら金属板,PTC素子並びに端子板の外周部を、絶
縁ガスケット(10)を介して、発電要素(1)を収納し
た電池缶(2)の開口部にシーム溶接で設けた封口板
(3)の内周端部に一体形成または溶接した、断面コの
字状の部材(4)により挟持してなることを特徴とする
筒形電池。1. A metal thin plate or a metal-synthetic resin laminate thin plate (7) is sandwiched by an outer peripheral folded-back portion of a metal plate (5) having a through hole (5a) in the center, and an outer peripheral folded-back portion of the metal plate. Ring-shaped on the outer surface of
Gas vent hole (9a) and cutting edge (9) through PTC element (8)
A battery in which the outer peripheral portion of the terminal plate (9) having b) is placed, and further the metal plate, the PTC element and the outer peripheral portion of the terminal plate are accommodated with the power generation element (1) through the insulating gasket (10). It is characterized in that it is sandwiched by a member (4) having a U-shaped cross section, which is integrally formed or welded to an inner peripheral end of a sealing plate (3) provided by seam welding at an opening of a can (2). Cylindrical battery.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1989066599U JPH0641338Y2 (en) | 1989-06-07 | 1989-06-07 | Cylindrical battery |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1989066599U JPH0641338Y2 (en) | 1989-06-07 | 1989-06-07 | Cylindrical battery |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH034651U JPH034651U (en) | 1991-01-17 |
JPH0641338Y2 true JPH0641338Y2 (en) | 1994-10-26 |
Family
ID=31599443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1989066599U Expired - Fee Related JPH0641338Y2 (en) | 1989-06-07 | 1989-06-07 | Cylindrical battery |
Country Status (1)
Country | Link |
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JP (1) | JPH0641338Y2 (en) |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3651962B2 (en) * | 1995-06-09 | 2005-05-25 | Fdk株式会社 | Batteries with explosion-proof safety function |
US5879832A (en) * | 1996-10-02 | 1999-03-09 | Duracell Inc. | Current interrupter for electrochemical cells |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS593476U (en) * | 1982-05-24 | 1984-01-10 | イ−ストマン コダック カンパニ− | battery |
JPS645360U (en) * | 1987-06-30 | 1989-01-12 |
-
1989
- 1989-06-07 JP JP1989066599U patent/JPH0641338Y2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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JPH034651U (en) | 1991-01-17 |
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