JPH09171807A - Pressure releasing device for battery case, and its manufacture - Google Patents
Pressure releasing device for battery case, and its manufactureInfo
- Publication number
- JPH09171807A JPH09171807A JP7353410A JP35341095A JPH09171807A JP H09171807 A JPH09171807 A JP H09171807A JP 7353410 A JP7353410 A JP 7353410A JP 35341095 A JP35341095 A JP 35341095A JP H09171807 A JPH09171807 A JP H09171807A
- Authority
- JP
- Japan
- Prior art keywords
- battery container
- pressure
- recess
- stainless steel
- battery case
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は電池容器用圧力開
放装置およびその製造方法に関するものであって、特に
燃料電池、リチウムイオン電池に用いられるものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure releasing device for a battery container and a method for manufacturing the same, and particularly to a fuel cell and a lithium ion battery.
【０００２】[0002]
【従来の技術】従来の電池容器用圧力開放装置は図３及
び図４に示されている。これらの図において、電池容器
１１はステンレス製の円筒１２と、この円筒１２の両端
にそれぞれ気密に取り付けられたステンレス製の丸いリ
ング状のキャップ１３、１４とからできている。キャッ
プ１３、１４の中央の丸い中心穴１３ａ、１４ａからは
電極ピン１５、１６が電池容器１１の内部から外部に向
かって延び出しており、この中心穴１３ａ、１４ａから
延び出した電極ピン１５、１６とキャップ１３、１４と
の間は絶縁物１７、１８によりそれぞれ気密にシールさ
れている。また、キャップ１３の外面には中心穴１３ａ
の廻りを距離をおいて囲むように断面Ｖ字状の溝１３ｂ
がリング状に形成されており、この溝１３ｂの底部には
内面まで貫通する開口１３ｃが溝１３ｂの底部に沿って
Ｃ字状に形成され、このＣ字状の開口１３ｃが形成され
ていない溝１３ｂの底部はヒンジ部１３ｄになってい
る。更に、キャップ１３の内面のうちＣ字状の開口１３
ｃの周縁部には、ニッケル合金箔１９が開口１３ｃを塞
ぐように銀と銅とからなるろう材で気密にろう付けされ
ている。なお、キャップ１４にも、キャップ１３と同様
に、断面Ｖ字状の溝１４ｂ、Ｃ字状の開口１４ｃ及びヒ
ンジ部１４ｄが形成され、ニッケル合金箔２０がろう付
けされている。2. Description of the Related Art A conventional pressure relief device for a battery container is shown in FIGS. In these drawings, the battery container 11 is made up of a stainless steel cylinder 12 and stainless steel round ring-shaped caps 13 and 14 airtightly attached to both ends of the cylinder 12. Electrode pins 15 and 16 extend from the inside of the battery case 11 toward the outside from the round center holes 13a and 14a at the center of the caps 13 and 14, and the electrode pins 15 that extend from the center holes 13a and 14a. Between the cap 16 and the caps 13 and 14 are airtightly sealed by insulators 17 and 18, respectively. The outer surface of the cap 13 has a center hole 13a.
13b with V-shaped cross section so as to surround the circumference of
Is formed in a ring shape, an opening 13c penetrating to the inner surface is formed in a C-shape along the bottom of the groove 13b at the bottom of the groove 13b, and the C-shaped opening 13c is not formed in the groove. The bottom of 13b is a hinge 13d. Further, the C-shaped opening 13 on the inner surface of the cap 13
A nickel alloy foil 19 is hermetically brazed with a brazing material composed of silver and copper so as to close the opening 13c at the peripheral portion of c. Similar to the cap 13, the cap 14 is also provided with a groove 14b having a V-shaped cross section, an opening 14c having a C-shape, and a hinge portion 14d, and the nickel alloy foil 20 is brazed thereto.
【０００３】このような電池容器用圧力開放装置におい
て、電池容器１内の圧力が上昇し、キャップ１３、１４
にヒンジ部１３ｄ、１４ｄの曲げ強度を越える圧力がか
かると、Ｃ字状の開口１３ｃ、１４ｃを塞いでいるニッ
ケル合金箔１９、２０が破断し、キャップ１３、１４の
Ｃ字状の開口１３ｃ、１４ｃで囲まれた部分がヒンジ部
１３ｄ、１４ｄから外方に押し曲げられて外方に開き、
電池容器１１内の圧力が開放されるようになる。In such a battery container pressure release device, the pressure in the battery container 1 rises and the caps 13 and 14 are released.
When a pressure exceeding the bending strength of the hinge portions 13d and 14d is applied to the nickel alloy foils 19 and 20 that block the C-shaped openings 13c and 14c, the C-shaped openings 13c of the caps 13 and 14 are broken. The portion surrounded by 14c is pushed outward from the hinge portions 13d and 14d and bent to open outward,
The pressure inside the battery container 11 is released.
【０００４】[0004]
【発明が解決しようとする課題】従来の電池容器用圧力
開放装置は、上記のようにニッケル合金箔１０、２０と
Ｃ字状の開口１３ｂ、１４ｂで囲まれた部分とに、ニッ
ケル合金箔１０、２０の破壊強度及びヒンジ部１３ｄ、
１４ｄの曲げ強度を越える圧力がかかると、Ｃ字状の開
口１３ｂ、１４ｂで囲まれた部分が外方に開き、電池容
器１１内の圧力が開放される。しかしながら、ヒンジ部
１３ｄ、１４ｄの曲げ強度を決定する溝１３ｂ、１４ｂ
の深さ、即ち、ヒンジ部１３ｄ、１４ｄのキャップ１
３、１４の厚みを一定にするのは難しいため、ヒンジ部
１３ｄ、１４ｄの曲げ強度が一定にならず、電池容器１
１によって電池容器用圧力開放装置が作動する圧力にば
らつきが生じる問題が起きた。In the conventional pressure releasing device for a battery container, as described above, the nickel alloy foil 10 and the nickel alloy foil 10 are surrounded by the C-shaped openings 13b and 14b. , The breaking strength of 20 and the hinge portion 13d,
When a pressure exceeding the bending strength of 14d is applied, the portion surrounded by the C-shaped openings 13b and 14b opens outward, and the pressure inside the battery container 11 is released. However, the grooves 13b, 14b that determine the bending strength of the hinge portions 13d, 14d
Depth, that is, the cap 1 of the hinge portions 13d and 14d
Since it is difficult to make the thicknesses of 3 and 14 constant, the bending strength of the hinge portions 13d and 14d does not become constant, and the battery container 1
1 caused a problem in that the pressure at which the battery container pressure release device operates varies.
【０００５】また、ステンレス製のキャップ１３、１４
とニッケル合金箔１９、２０との接合には銀と銅とから
なるろう材を用いているが、このろう材はステンレスや
ニッケル合金と比べると電池容器１１内の腐食雰囲気に
より腐食されやすい（ガルバニックコロージョン）た
め、ステンレス製のキャップ１３、１４とニッケル合金
箔１９、２０との接合部の気密性を長期に亘り保つこと
ができない問題が起きた。Further, stainless steel caps 13 and 14
A brazing material made of silver and copper is used for joining the nickel alloy foils 19 and 20 with each other, but this brazing material is more likely to be corroded by the corrosive atmosphere in the battery container 11 than galvanic alloys (galvanic). Therefore, there was a problem that the airtightness of the joint between the stainless steel caps 13 and 14 and the nickel alloy foils 19 and 20 could not be maintained for a long time.
【０００６】この発明の目的は、従来の上記問題を解決
して、電池容器内の圧力が所定の圧力に達したら内部の
圧力が開放され、電池容器によって作動する圧力にばら
つきがなく、また長期に亘り気密性を保つことができる
電池容器用圧力開放装置およびその製造方法を提供する
ことにある。The object of the present invention is to solve the above-mentioned problems of the prior art, and when the pressure inside the battery container reaches a predetermined pressure, the internal pressure is released, and there is no variation in the pressure operating by the battery container, and there is a long-term operation. (EN) Provided are a pressure releasing device for a battery container capable of maintaining airtightness over a period of time and a manufacturing method thereof.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、この発明の電池容器用圧力開放装置は、電池容器に
形成された貫通穴をステンレス箔で塞ぎ、このステンレ
ス箔を電池容器に気密に溶着したものである。In order to achieve the above object, a pressure releasing device for a battery container according to the present invention closes a through hole formed in the battery container with a stainless foil, and the stainless foil is hermetically sealed in the battery container. It is welded to.
【０００８】また、この発明の電池容器用圧力開放装置
の製造方法は、電池容器に形成された貫通穴をステンレ
ス箔で塞ぎ、このステンレス箔を電池容器に電子ビーム
またはレーザーによって気密に溶着したものである。Further, according to the method of manufacturing the pressure releasing device for a battery container of the present invention, the through hole formed in the battery container is closed with a stainless foil, and the stainless foil is hermetically welded to the battery container by an electron beam or a laser. Is.
【０００９】[0009]
【発明の実施の形態】以下、この発明の実施の形態を実
施例に基づいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples.
【００１０】[0010]
【実施例】この発明の実施例の電池容器用圧力開放装置
は図１及び図２に示されている。これらの図において、
電池容器１はステンレス製の円筒２と、この円筒２の両
端にそれぞれ気密に取り付けられたステンレス製の丸い
リング状のキャップ３、４とからできている。キャップ
３、４の中央の丸い中心穴３ａ、４ａからは電極ピン
５、６が電池容器１の内部から外部に向かって延び出し
ており、この中心穴３ａ、４ａから延び出した電極ピン
５、６とキャップ３、４との間は絶縁物７、８によりそ
れぞれ気密にシールされている。また、キャップ３の外
面には座ぐり加工によって円形の凹部３ｂが形成され、
この凹部３ｂ内の底部３ｂ１には凹部３ｂの直径より小
さい直径を有する、キャップ３の内面まで貫通する円形
の貫通穴３ｃが凹部３ｂと同軸上に形成されている。そ
して、凹部３ｂ内の底部３ｂ１には、凹部３ｂの直径と
ほぼ同じ大きさの直径を有する円形のステンレス箔９が
貫通穴３ｃを塞ぐように気密に溶着されている。この溶
着は、凹部３ｂ内の底部３ｂ１に載置されたステンレス
箔９の上部から電子ビームをステンレス箔９の周縁部に
沿って移動させながら照射して行う。なお、キャップ４
にも、キャップ３と同様に、凹部４ｂ、凹部４ｂ内の底
部４ｂ１及び貫通穴４ｃが形成され、ステンレス箔１０
が溶着されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS A pressure relief device for a battery container according to an embodiment of the present invention is shown in FIGS. In these figures,
The battery container 1 is made up of a stainless steel cylinder 2 and round stainless steel ring-shaped caps 3 and 4 attached to both ends of the cylinder 2 in an airtight manner. Electrode pins 5 and 6 extend from the inside of the battery container 1 toward the outside from the round center holes 3a and 4a in the center of the caps 3 and 4, and the electrode pins 5 extending from the center holes 3a and 4a, The insulator 6 and the cap 3 and 4 are hermetically sealed by insulators 7 and 8, respectively. Further, a circular recess 3b is formed on the outer surface of the cap 3 by spot facing,
A circular through hole 3c having a diameter smaller than that of the recess 3b and penetrating to the inner surface of the cap 3 is formed coaxially with the recess 3b in the bottom portion 3b 1 in the recess 3b. Then, the bottom 3b 1 in the recess 3b, a circular stainless steel foil 9 having a diameter of approximately the same size as the diameter of the recess 3b is welded airtightly so as to close the through hole 3c. This welding is performed by irradiating an electron beam from the upper portion of the stainless steel foil 9 placed on the bottom portion 3b 1 in the recess 3b while moving the electron beam along the peripheral edge portion of the stainless steel foil 9. In addition, cap 4
Also, similarly to the cap 3, the recess 4b, the bottom 4b 1 and the through hole 4c in the recess 4b is formed, a stainless steel foil 10
Is welded.
【００１１】このような実施例においては、電池容器１
内の圧力が上昇し、ステンレス箔９、１０にこれの破壊
強度を越える圧力がかかると、ステンレス箔９、１０が
破裂し、電池容器１内の圧力が開放されるようになる。
その場合、ステンレス箔９、１０の破壊強度は箔の厚み
により決まるので、ステンレス箔９、１０の厚みを一定
にすることによりステンレス箔９、１０が破裂する圧力
を一定にすることができる。そのため、電池容器１内の
圧力が所定の圧力に達したら内部の圧力を開放すること
ができるようになり、電池容器によって作動する圧力が
ばらつくことがなくなる。In such an embodiment, the battery container 1
When the internal pressure rises and the stainless foils 9 and 10 are subjected to a pressure exceeding their breaking strength, the stainless foils 9 and 10 burst and the internal pressure of the battery container 1 is released.
In that case, since the breaking strength of the stainless steel foils 9 and 10 is determined by the thickness of the foils, the pressure at which the stainless steel foils 9 and 10 burst can be made constant by making the thicknesses of the stainless steel foils 9 and 10 constant. Therefore, when the pressure in the battery container 1 reaches a predetermined pressure, the internal pressure can be released, and the operating pressure of the battery container does not vary.
【００１２】また、ステンレス箔９、１０とキャップ
３、４とを接合する際、電子ビームによってこれらを溶
着しているため、ステンレス箔９、１０とキャップ３、
４との接合部の気密性を長期に亘り保つことができる。
特に、電池容器１の材質もステンレスにすると、電池容
器１内が腐食雰囲気でもステンレス箔９、１０とキャッ
プ３、４との接合部はガルバニックコロージョンが起こ
らないため、この接合部の気密性を一層長期に亘り保つ
ことができる。When the stainless steel foils 9 and 10 and the caps 3 and 4 are joined, they are welded by an electron beam, so that the stainless steel foils 9 and 10 and the caps 3 and 4 are welded.
The airtightness of the joint with 4 can be maintained for a long time.
In particular, if the material of the battery container 1 is also stainless, galvanic corrosion does not occur at the joint between the stainless steel foils 9 and 10 and the caps 3 and 4 even in a corrosive atmosphere inside the battery container 1, so that the airtightness of this joint is further improved. It can be maintained for a long time.
【００１３】ところで、上記実施例では、貫通穴３ｃ、
４ｃをキャップ３、４に形成しているが、貫通穴は円筒
２に形成してもよい。また、電池容器１の形状は円柱状
にしているが、これ以外の形状であってもよい。更に、
キャップ３、４の外面に凹部３ｂ、４ｂを形成している
が、これらは形成しなくてもよい。その場合、ステンレ
ス箔９、１０は貫通穴３ｃ、４ｃの周縁のキャップ３、
４に溶着すればよい。更にその上、貫通穴３ｃ、４ｃの
形状は円形にしているが、これ以外の形状であってもよ
い。更にその上、キャップ３、４にはそれぞれ複数個の
貫通穴３ｃ、４ｃを形成し、各貫通穴３ｃ、４ｃをステ
ンレス箔９、１０で塞ぐようにしてもよい。更にその
上、ステンレス箔９、１０をキャップ３、４に溶着する
際、電子ビームを照射したが、その代わりにレーザーを
照射してもよい。By the way, in the above embodiment, the through holes 3c,
Although 4c is formed in the caps 3 and 4, the through hole may be formed in the cylinder 2. Further, although the battery container 1 has a cylindrical shape, it may have a shape other than this. Furthermore,
Although the recesses 3b and 4b are formed on the outer surfaces of the caps 3 and 4, they may not be formed. In that case, the stainless steel foils 9 and 10 are the caps 3 on the periphery of the through holes 3c and 4c,
It may be welded to No. 4. Furthermore, although the through holes 3c and 4c are circular in shape, other shapes may be used. Furthermore, a plurality of through holes 3c and 4c may be formed in the caps 3 and 4, and the through holes 3c and 4c may be closed with the stainless steel foils 9 and 10. Furthermore, when the stainless steel foils 9 and 10 were welded to the caps 3 and 4, the electron beam was applied, but a laser may be applied instead.
【００１４】[0014]
【発明の効果】この発明は、上記のように電池容器に形
成された貫通穴をステンレス箔で塞ぎ、このステンレス
箔を電池容器に気密に溶着しているので、電池容器内の
圧力が上昇し、ステンレス箔にこれの破壊強度を越える
圧力がかかると、ステンレス箔が破裂し、電池容器内の
圧力が開放されるようになる。その場合、ステンレス箔
の破壊強度は箔の厚みにより決まるので、ステンレス箔
の厚みを一定にすることによりステンレス箔が破裂する
圧力を一定にすることができる。そのため、電池容器内
の圧力が所定の圧力に達したら内部の圧力を開放するこ
とができるようになり、電池容器によって作動する圧力
がばらつくことがなくなる。As described above, according to the present invention, the through hole formed in the battery container as described above is closed with the stainless foil, and the stainless foil is hermetically welded to the battery container, so that the pressure in the battery container increases. When a pressure exceeding the breaking strength is applied to the stainless steel foil, the stainless steel foil bursts and the pressure inside the battery container is released. In that case, since the breaking strength of the stainless steel foil is determined by the thickness of the foil, the pressure at which the stainless steel foil bursts can be made constant by making the thickness of the stainless steel foil constant. Therefore, when the pressure in the battery container reaches a predetermined pressure, the internal pressure can be released, and the operating pressure of the battery container does not vary.
【００１５】また、ステンレス箔と電池容器とを接合す
る際、電子ビームによってこれらを溶着しているため、
ステンレス箔と電池容器との接合部の気密性を長期に亘
り保つことができる。Further, when the stainless steel foil and the battery container are joined, they are welded by an electron beam,
The airtightness of the joint between the stainless steel foil and the battery container can be maintained for a long period of time.
【図１】この発明の実施例の断面図FIG. 1 is a sectional view of an embodiment of the present invention.
【図２】この発明の実施例の側面図FIG. 2 is a side view of the embodiment of the present invention.
【図３】従来の電池容器用圧力開放装置の断面図FIG. 3 is a cross-sectional view of a conventional pressure relief device for a battery container.
【図４】従来の電池容器用圧力開放装置の側面図FIG. 4 is a side view of a conventional pressure relief device for a battery container.
１・・・・・・・・電池容器 ２・・・・・・・・円筒 ３、４・・・・・・キャップ ３ａ、４ａ・・・・中心穴 ３ｂ、４ｂ・・・・凹部 ３ｂ１、４ｂ１・・凹部内の底部 ３ｃ、４ｃ・・・・貫通穴 ５、６・・・・・・電極ピン ７、８・・・・・・絶縁物 ９、１０・・・・・ステンレス箔1 ... Battery container 2 ... Cylinder 3, 4 ... Cap 3a, 4a ... Center hole 3b, 4b Recess 3b 1 4b 1 ... bottom of the recess 3c, 4c ... through hole 5,6 ... electrode pin 7,8 ... insulator 9,10 ... stainless steel foil
Claims (2)
箔で塞ぎ、このステンレス箔を電池容器に気密に溶着し
たことを特徴とする電池容器用圧力開放装置。1. A pressure releasing device for a battery container, wherein a through hole formed in the battery container is closed with a stainless foil, and the stainless foil is welded to the battery container in an airtight manner.
箔で塞ぎ、このステンレス箔を電池容器に電子ビームま
たはレーザーによって気密に溶着したことを特徴とする
電池容器用圧力開放装置の製造方法。2. A method of manufacturing a pressure release device for a battery container, wherein a through hole formed in the battery container is closed with a stainless foil, and the stainless foil is welded to the battery container in an airtight manner by an electron beam or a laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7353410A JPH09171807A (en) | 1995-12-19 | 1995-12-19 | Pressure releasing device for battery case, and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7353410A JPH09171807A (en) | 1995-12-19 | 1995-12-19 | Pressure releasing device for battery case, and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09171807A true JPH09171807A (en) | 1997-06-30 |
Family
ID=18430655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7353410A Pending JPH09171807A (en) | 1995-12-19 | 1995-12-19 | Pressure releasing device for battery case, and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09171807A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013200952A (en) * | 2012-03-23 | 2013-10-03 | Nisshin Steel Co Ltd | Battery container safety valve and method of manufacturing the same |
-
1995
- 1995-12-19 JP JP7353410A patent/JPH09171807A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013200952A (en) * | 2012-03-23 | 2013-10-03 | Nisshin Steel Co Ltd | Battery container safety valve and method of manufacturing the same |
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