JP3142788U - Battery safety valve device - Google Patents
Battery safety valve device Download PDFInfo
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- JP3142788U JP3142788U JP2008002394U JP2008002394U JP3142788U JP 3142788 U JP3142788 U JP 3142788U JP 2008002394 U JP2008002394 U JP 2008002394U JP 2008002394 U JP2008002394 U JP 2008002394U JP 3142788 U JP3142788 U JP 3142788U
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- cutting blade
- groove
- safety valve
- battery
- thin plate
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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
- 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
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- Gas Exhaust Devices For Batteries (AREA)
Abstract
【課題】安全弁を構成する蓋板のコストをかけずに確実にガスを逃がすことができるようにした電池の安全弁装置を提供する。
【解決手段】ガス抜き孔を有する蓋板１の内面に密閉容器の内面を覆うように設けられた薄板３と、この上部に電池内圧の上昇時に該薄板３を開裂するための切り刃２を備え、少なくともこの切り刃２の先端部分に連続する溝部を形成したことを特徴とするものである。この溝部は蓋板の表面を切削することにより形成するが、切り刃２を型に押し込み表面をくぼませて溝部を形成し、その裏面に突条を形成してＶ字状にしても良い。
【選択図】図１To provide a safety valve device for a battery capable of reliably releasing gas without incurring the cost of a cover plate constituting the safety valve.
A thin plate 3 provided on the inner surface of a cover plate 1 having a gas vent hole so as to cover the inner surface of the hermetic container, and a cutting blade 2 for cleaving the thin plate 3 at the time when the battery internal pressure increases are provided on the upper portion. It is characterized by forming a continuous groove at least at the tip of the cutting blade 2. The groove is formed by cutting the surface of the cover plate. However, the cutting edge 2 may be pushed into a mold to form a groove by recessing the surface, and a protrusion may be formed on the back surface of the groove to form a V shape.
[Selection] Figure 1
Description
本考案は、急激な内圧の上昇時に対処することができる電池の安全弁構造に関するものである。 The present invention relates to a safety valve structure for a battery that can cope with a sudden increase in internal pressure.
従来、ニッケル−カドミウムやニッケル−水素などのアルカリ二次電池やリチウム二次電池の安全弁装置としては、ダイヤフラム方式のものが用いられている。図５に示すように電池を封口する蓋板１の内面に金属製もしくはポリエチレンやポリプロピレン等の合成樹脂製の薄板３を設け、電池の使用中に例えば充電中など何らかの原因で電池の内圧が急激に上昇した際に、該薄板３が圧力で押し上げられ、その上方に形成された三角形状の切り刃２で貫通して該薄板３を開裂し、開口部４より電池内部のガスを逃がすことで電池が破裂することを防止していた。 Conventionally, as a safety valve device for alkaline secondary batteries such as nickel-cadmium and nickel-hydrogen, and lithium secondary batteries, a diaphragm type is used. As shown in FIG. 5, a thin plate 3 made of metal or synthetic resin such as polyethylene or polypropylene is provided on the inner surface of the lid plate 1 that seals the battery, and the internal pressure of the battery suddenly increases for some reason, for example, during charging, during use of the battery. When the thin plate 3 is pushed up by pressure, the thin plate 3 is pushed up by pressure, penetrated by the triangular cutting blade 2 formed thereabove to cleave the thin plate 3, and the gas inside the battery is released from the opening 4. The battery was prevented from bursting.
しかしながら、ガスの放出後に該薄板３が切り刃２の表面に付着して、再度ガスが発生したときにうまくガスを逃がすことができないことがあった。時には、多量のガスが発生した場合に作動が遅れて金属製の外装ケースを膨出させ、破裂することもあった。 However, when the thin plate 3 adheres to the surface of the cutting blade 2 after the gas is released and the gas is generated again, the gas may not be released well. Occasionally, when a large amount of gas is generated, the operation is delayed and the metal outer case bulges and bursts.
この問題を解決するために、切り刃としてその先端を二股にして中間に空隙を形成したり（特許文献１）、切り刃表面に透孔部を穿ったり（特許文献２）、あるいは切り刃の中間部に最大幅広部を形成したり（特許文献３）することが提案されている。また、上記特許文献１〜３に記載の考案は蓋板１の一部を切り欠いた部分を下方に折り曲げて切り刃２としているが、この切り刃２を刺通針として中空筒状に形成する（特許文献４、５）ことが提案されている。 In order to solve this problem, as a cutting blade, the tip is bifurcated to form a gap in the middle (Patent Document 1), a through-hole portion is drilled on the surface of the cutting blade (Patent Document 2), or the cutting blade It has been proposed to form a maximum wide portion in the intermediate portion (Patent Document 3). Further, in the devices described in Patent Documents 1 to 3, a part of the cover plate 1 that is cut out is bent downward to form a cutting blade 2. The cutting blade 2 is formed into a hollow cylindrical shape as a piercing needle. (Patent Documents 4 and 5) have been proposed.
しかしながら、このような切り刃は蓋板の一部を切り欠き、これを下方に折り曲げることで形成されるため簡単で好ましいが、上記従来の構造ではガスを逃がすのに十分な機能を果たさない場合がある。すなわち、特許文献１に記載の構造は、二股の先端にしても薄板が該二股間に残って十分な開口部が得られないという問題がある。また、特許文献２に記載の構造は透孔部の下方で薄板に付着する恐れがあり、特許文献３に記載の構造ではガス圧が平常に戻った場合に最大幅広部の下方位置で薄板に付着する恐れがあって、いずれもガスを逃がすのに十分は機能を果たしていなかった。さらに、特許文献４及び５に記載の構造はこれらの問題点はないものの、蓋板の一部を切り欠く構成と比較してコストがかかるという問題点があった。 However, such a cutting blade is simple and preferable because it is formed by cutting out a part of the cover plate and bending it downward, but the above conventional structure does not perform a sufficient function to escape the gas. There is. That is, the structure described in Patent Document 1 has a problem that a thin plate remains between the forked ends even at the forked ends, and a sufficient opening cannot be obtained. In addition, the structure described in Patent Document 2 may adhere to the thin plate below the through-hole portion. In the structure described in Patent Document 3, when the gas pressure returns to normal, the thin plate is positioned below the maximum wide portion. None of them functioned well enough to allow gas to escape. Furthermore, although the structures described in Patent Documents 4 and 5 do not have these problems, there is a problem that the cost is higher than a structure in which a part of the cover plate is cut out.
そこで、本考案は上記問題点を考慮し、安全弁を構成する蓋板のコストをかけずに確実にガスを逃がすことができるようにした電池の安全弁装置を提供することを目的とする。 In view of the above problems, an object of the present invention is to provide a safety valve device for a battery in which gas can be surely released without incurring the cost of a cover plate constituting the safety valve.
本考案に係る電池の安全弁装置は、ガス抜き孔を有する蓋板の内面に密閉容器の内面を覆うように設けられた薄板と、この上部に電池内圧の上昇時に該薄板を開裂するための切り刃を備え、少なくともこの切り刃の先端部分に連続する溝部を形成したことを特徴とするものである。 A safety valve device for a battery according to the present invention includes a thin plate provided on the inner surface of a lid plate having a gas vent hole so as to cover the inner surface of the sealed container, and a cutout for cleaving the thin plate when the internal pressure of the battery increases. A blade is provided, and a groove is formed at least at the tip of the cutting blade.
なお、この溝部は切り刃の表面を切削することにより形成するが、切り刃を型に押し込んで表面をくぼませて溝部を形成し、その裏面に突条を形成してＶ字状にしても良い。切削する手段としてはレーザー照射により形成しても良いし、機械的に表面を削って形成しても良いが、あまり深く形成すると切り刃が半分に分割されるおそれがあるため、その厚さの１／２位までが好ましい。また、溝部は切り刃の折り曲げた部分から先端の部分まで形成するが、少なくとも内圧で上昇した薄板を貫通するだけの長さがあれば良い。 The groove is formed by cutting the surface of the cutting blade. The groove is formed by pressing the cutting blade into a mold to form a groove, and a protrusion is formed on the back surface of the groove to form a V shape. good. The cutting means may be formed by laser irradiation or may be formed by mechanically cutting the surface, but if it is formed too deep, the cutting edge may be divided in half. It is preferably up to 1/2. In addition, the groove is formed from the bent part of the cutting blade to the tip part, but it is sufficient that the groove is long enough to penetrate at least the thin plate raised by the internal pressure.
また、この溝部を形成する時期であるが、蓋板に三角形状の切り欠きを形成しこれを折り曲げて切り刃とする前に行うことが好ましい。具体的には、三角形状の切り欠きを形成すると同時またはその後に形成することで容易に行える。 Moreover, it is a time when this groove part is formed, but it is preferable to perform it before forming a triangular notch in the cover plate and bending it into a cutting blade. Specifically, it can be easily performed by forming a triangular cutout at the same time or after the formation of the triangular cutout.
薄板としては、金属製もしくはポリエチレンやポリプロピレン等の合成樹脂製のものが一般的に用いられるが、内圧上昇時に可撓性を有するものであれば特に問題ない。 As the thin plate, one made of metal or synthetic resin such as polyethylene or polypropylene is generally used, but there is no particular problem as long as it has flexibility when the internal pressure is increased.
本考案によれば、薄板を切り刃で開口した後でも透孔部を残しているため、確実にガスの散逸を可能にし、その結果薄板の切り刃への付着による不具合を防止するものである。 According to the present invention, since the through-hole portion remains even after the thin plate is opened with the cutting blade, gas can be surely dissipated, and as a result, problems due to adhesion of the thin plate to the cutting blade are prevented. .
以下、図面に基づき本考案の実施の詳細を説明する。図１は本考案の電池の要部断面図を示すものである。また、図２は電池の安全弁装置の要部の正面図を示すもの、図３はその側面図を示すものである。１は金属製の蓋板で、２は切り刃、３は薄板である。ここで、切り刃２は従来と同様に金属製の蓋板１に三角形状の切り欠きを形成し、切り欠いた三角形の部分を下方に折り曲げて切り刃２とすると同時に開口部４を形成したものである。ここまでは従来と変わらないが、本考案ではこの下方に折り曲げ突出した切り刃２の三角形部分を、左右に分割するようにその刺通方向に沿って連続する溝部を形成したものである。切り刃２は平板部２ａと溝部２ｂから構成される。図４（ａ）〜（ｃ）は切り刃２のＡ−Ａ’部の断面を示したものである。該切り刃２は図４（ａ）に示すように型に押し込み表面をくぼませて溝部を形成したものであるが、図４（ｂ）に示すようにその表面を切削することにより溝部を形成しても良い。また、図４（ｃ）に示すように型に押し込み表面をくぼませてより大きな溝部を形成することもできる。 Details of the implementation of the present invention will be described below with reference to the drawings. FIG. 1 shows a cross-sectional view of the main part of the battery of the present invention. 2 shows a front view of the main part of the battery safety valve device, and FIG. 3 shows a side view thereof. 1 is a metal cover plate, 2 is a cutting blade, and 3 is a thin plate. Here, the cutting blade 2 is formed with a triangular cutout in the metal lid plate 1 as in the prior art, and the cutout triangular portion is bent downward to form the cutting blade 2 and at the same time the opening 4 is formed. Is. Although it is not different from heretofore, in the present invention, the triangular portion of the cutting blade 2 bent and projected downward is formed with a continuous groove portion along the piercing direction so as to be divided into left and right. The cutting blade 2 includes a flat plate portion 2a and a groove portion 2b. 4A to 4C show a cross section of the A-A ′ portion of the cutting blade 2. As shown in FIG. 4 (a), the cutting blade 2 is pressed into a mold to form a groove by indenting the surface, but the groove is formed by cutting the surface as shown in FIG. 4 (b). You may do it. Moreover, as shown in FIG.4 (c), it can push into a type | mold and can indent a surface and can also form a bigger groove part.
図１に本考案をニッケル−カドミウム電池に適用した例を示す。上記安全弁装置を備えた蓋板１はその下部に位置する薄板３と共に、負極端子を兼ねる円筒形の外装ケース６の開口部に絶縁パッキング７を介してかしめることで気密的に装着される。この外装ケース６内には、ニッケル正極板１０とカドミウム負極板１１をナイロン製のセパレータ１２を介して積層し渦巻状に巻回してなる極板群が収納され、該ニッケル正極板１０から上部絶縁板９を通して導出した正極リード線５の端部は蓋板１の下部に配置された金属製の薄板３の裏面にスポット溶接されている。 FIG. 1 shows an example in which the present invention is applied to a nickel-cadmium battery. The lid plate 1 provided with the safety valve device is airtightly attached by caulking through an insulating packing 7 to an opening of a cylindrical outer case 6 that also serves as a negative electrode terminal, together with a thin plate 3 positioned below the lid plate 1. In the outer case 6, an electrode plate group in which a nickel positive electrode plate 10 and a cadmium negative electrode plate 11 are laminated via a nylon separator 12 and wound in a spiral shape is housed. The end portion of the positive electrode lead wire 5 led out through the plate 9 is spot welded to the back surface of the metal thin plate 3 disposed under the lid plate 1.
このような構造にすることで、内圧上昇により薄板３が膨出して切り刃２で開口され、ガスが放出された後に薄板３が塑性変形により元の位置に近い所に戻って切り刃２に付着しても、溝部２ｂにより確実にガスの透孔部を保持することができる。これにより、その後再びガスが多量に発生しても、該透孔部から散逸すると共にやがては再び膨出して速やかに且つ確実にガスを散逸させることができるものである。 By adopting such a structure, the thin plate 3 bulges due to an increase in internal pressure and is opened by the cutting blade 2, and after the gas is released, the thin plate 3 returns to a position close to the original position by plastic deformation and becomes the cutting blade 2. Even if it adheres, the through-hole part of gas can be reliably hold | maintained by the groove part 2b. As a result, even if a large amount of gas is generated again thereafter, it is dissipated from the through-hole portion, and then swells again, so that the gas can be dissipated quickly and reliably.
本考案はニッケル−カドミウムや、ニッケル−水素などのアルカリ二次電池、またリチウム二次電池に適用される。 The present invention is applied to alkaline secondary batteries such as nickel-cadmium and nickel-hydrogen, and lithium secondary batteries.
１…蓋板
２…切り刃
２ａ…平板部
２ｂ…溝部
３…薄板
４…開口部
５…正極リード線
６…外装ケース
７…絶縁パッキング
８…絶縁リング
９…上部絶縁板
１０…正極板
１１…負極板
１２…セパレータ
DESCRIPTION OF SYMBOLS 1 ... Lid plate 2 ... Cutting blade 2a ... Flat plate part 2b ... Groove part 3 ... Thin plate 4 ... Opening part 5 ... Positive electrode lead wire 6 ... Exterior case 7 ... Insulation packing 8 ... Insulation ring 9 ... Upper insulating plate 10 ... Positive electrode plate 11 ... Negative electrode plate 12 ... Separator
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008002394U JP3142788U (en) | 2008-04-15 | 2008-04-15 | Battery safety valve device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008002394U JP3142788U (en) | 2008-04-15 | 2008-04-15 | Battery safety valve device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP3142788U true JP3142788U (en) | 2008-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008002394U Expired - Lifetime JP3142788U (en) | 2008-04-15 | 2008-04-15 | Battery safety valve device |
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| Country | Link |
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| JP (1) | JP3142788U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102263219A (en) * | 2011-06-17 | 2011-11-30 | 东莞市万笠电子科技有限公司 | Elastic control piercing explosion protection device |
| WO2022244520A1 (en) * | 2021-05-17 | 2022-11-24 | 日本製紙株式会社 | Dispensing pump and refill container using dispensing pump |
-
2008
- 2008-04-15 JP JP2008002394U patent/JP3142788U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102263219A (en) * | 2011-06-17 | 2011-11-30 | 东莞市万笠电子科技有限公司 | Elastic control piercing explosion protection device |
| CN102263219B (en) * | 2011-06-17 | 2014-01-29 | 东莞市万笠电子科技有限公司 | Elastic control piercing explosion protection device |
| WO2022244520A1 (en) * | 2021-05-17 | 2022-11-24 | 日本製紙株式会社 | Dispensing pump and refill container using dispensing pump |
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