JP2002260622A - Seal plate - Google Patents
Seal plateInfo
- Publication number
- JP2002260622A JP2002260622A JP2001057700A JP2001057700A JP2002260622A JP 2002260622 A JP2002260622 A JP 2002260622A JP 2001057700 A JP2001057700 A JP 2001057700A JP 2001057700 A JP2001057700 A JP 2001057700A JP 2002260622 A JP2002260622 A JP 2002260622A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- functional film
- sealing plate
- pressure vessel
- function
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- Y02E60/13—Energy storage using capacitors
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電池（一次電池お
よび二次電池を含む）またはコンデンサー（電解コンデ
ンサーおよび電気二重層コンデンサーを含む）等におい
て、電池素子や電解液等の収容物を収容する圧力容器の
開口部を閉塞する封口板に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery (including a primary battery and a secondary battery) or a capacitor (including an electrolytic capacitor and an electric double layer capacitor) or the like for accommodating a battery element, an electrolyte solution, and the like. The present invention relates to a sealing plate for closing an opening of a pressure vessel.
【０００２】[0002]
【従来の技術】従来から、図４に示すように、電池素子
や電解液等の収容物５３を収容するケース５２と、この
ケース５２の開口部５２ａを閉塞する封口板５４とを有
する電池等の圧力容器５１が知られており、封口板５４
には、一対の電極端子５５が設けられるとともに、圧力
容器５１の内圧が異常に上昇したときに破裂してこの内
圧を外部へ開放するための防爆弁５６が設けられてい
る。2. Description of the Related Art Conventionally, as shown in FIG. 4, a battery or the like having a case 52 for accommodating a container 53 such as a battery element and an electrolytic solution, and a sealing plate 54 for closing an opening 52a of the case 52. Pressure vessel 51 is known, and sealing plate 54
Is provided with a pair of electrode terminals 55 and an explosion-proof valve 56 for rupture when the internal pressure of the pressure vessel 51 rises abnormally and releasing this internal pressure to the outside.
【０００３】しかしながら、この従来技術においては、
防爆弁５６がゴム材料によって成形されていてゴム材料
が一般に伸縮性の比較的大きなものであるために、破裂
圧力のバラツキが大きく、よって破裂圧力の大きさを制
御するのが困難であると云う不都合がある。However, in this prior art,
Since the explosion-proof valve 56 is formed of a rubber material and the rubber material is generally relatively large in elasticity, the burst pressure varies widely, and it is difficult to control the burst pressure. There are inconveniences.
【０００４】また、上記従来技術は、防爆弁５６による
防爆機能を有しているが、電解液等が反応するときの温
度上昇やガス発生による内圧上昇を抑えるべく圧力容器
５１の内外を通気させて圧力容器５１の内圧を略一定に
維持するためのブリーザ機能を有していない。したがっ
て、上記内圧上昇を圧力容器５１内で抑えるべく圧力容
器５１内に予め余剰スペースを確保しておく必要があ
り、よって圧力容器５１の容量を縮小することができ
ず、圧力容器５１を小型化することができないと云う不
都合がある。Further, the above-mentioned prior art has an explosion-proof function by means of an explosion-proof valve 56. However, the inside and outside of the pressure vessel 51 are ventilated in order to suppress a rise in temperature when an electrolyte or the like reacts or a rise in internal pressure due to gas generation. Therefore, it does not have a breather function for maintaining the internal pressure of the pressure vessel 51 substantially constant. Therefore, it is necessary to secure an extra space in the pressure vessel 51 in advance in order to suppress the increase in the internal pressure in the pressure vessel 51. Therefore, the capacity of the pressure vessel 51 cannot be reduced, and the pressure vessel 51 can be downsized. There is an inconvenience that you cannot do it.
【０００５】[0005]
【発明が解決しようとする課題】本発明は以上の点に鑑
みて、ブリーザ機能を有して圧力容器の内圧を略一定に
保つことができ、もって圧力容器内に予め上昇圧力吸収
用の余剰スペースを設ける必要がなく、この分、圧力容
器を小型化することが可能な封口板を提供することを目
的とし、またこれに加えて、防爆弁としての破裂圧力の
大きさを比較的容易に制御することが可能な封口板を提
供することを目的とする。SUMMARY OF THE INVENTION In view of the above, the present invention has a breather function and can keep the internal pressure of a pressure vessel substantially constant, so that excess pressure for absorbing a rising pressure is previously stored in the pressure vessel. The purpose of the present invention is to provide a sealing plate that can reduce the size of the pressure vessel without the need for providing a space, and in addition, the size of the burst pressure as an explosion-proof valve can be relatively easily adjusted. It is an object to provide a controllable sealing plate.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、本発明の請求項１による封口板は、電池素子や電解
液等の収容物を収容する圧力容器の開口部を閉塞する封
口板であって、前記圧力容器の内外を連通する連通流路
と、前記連通流路を遮断するように配置される機能膜と
を有し、前記機能膜が、気体透過性および液体不透過性
を有して前記圧力容器の内外を通気させるブリーザ機能
と、前記圧力容器の内圧が急激に上昇したときにこの機
能膜が破裂することによって前記内圧を外部へ緊急開放
する防爆機能とを兼ね備えていることを特徴とするもの
である。In order to achieve the above object, a sealing plate according to claim 1 of the present invention is a sealing plate for closing an opening of a pressure vessel for accommodating a container such as a battery element and an electrolyte. And a communication channel communicating between the inside and the outside of the pressure vessel, and a functional membrane arranged to block the communication channel, wherein the functional membrane has gas permeability and liquid impermeability. A breather function for ventilating the inside and outside of the pressure vessel, and an explosion-proof function for urgently releasing the internal pressure to the outside by bursting this functional film when the internal pressure of the pressure vessel rises rapidly. It is characterized by the following.
【０００７】また、本発明の請求項２による封口板は、
上記した請求項１の封口板において、前記機能膜が、樹
脂系素材よりなる膜状の多孔質体に撥水処理を施したも
のであることを特徴とするものである。[0007] The sealing plate according to claim 2 of the present invention comprises:
The above-mentioned sealing plate according to claim 1, wherein the functional film is obtained by subjecting a film-like porous body made of a resin material to a water-repellent treatment.
【０００８】また、本発明の請求項３による封口板は、
上記した請求項１または２の封口板において、前記機能
膜が圧力容器の内圧を受けて変形したときに接触してそ
の破裂を促進させる突起等よりなる機能膜破裂促進部が
機能膜取付側に設けられていることを特徴とするもので
ある。[0008] The sealing plate according to claim 3 of the present invention comprises:
In the above-mentioned sealing plate according to claim 1 or 2, a functional film rupture accelerating portion comprising a projection or the like which comes into contact when the functional film is deformed by receiving the internal pressure of the pressure vessel and accelerates the rupture thereof is provided on the functional film mounting side. It is characterized by being provided.
【０００９】上記構成を備えた本発明の請求項１による
封口板においては、上記従来技術におけるゴム材料製の
防爆弁に代えて機能膜が設けられ、この機能膜がブリー
ザ機能および防爆機能の双方を備えているために、前者
のブリーザ機能によって、圧力容器の内圧を略一定に保
つことが可能となり、後者の防爆機能によって、圧力容
器の爆発に至るほどの蓄圧が急激に発生するのを防止す
ることが可能となる。In the sealing plate according to the first aspect of the present invention having the above structure, a functional film is provided instead of the explosion-proof valve made of a rubber material in the prior art, and the functional film has both a breather function and an explosion-proof function. With the former, the breather function of the former makes it possible to keep the internal pressure of the pressure vessel almost constant, and the explosion-proof function of the latter prevents sudden accumulation of pressure that could lead to the explosion of the pressure vessel. It is possible to do.
【００１０】このような機能を備える機能膜としては、
請求項２に記載したように、樹脂系素材よりなる膜状の
多孔質体に撥水処理を施したものが好適であって、この
ように機能膜が樹脂系素材よりなるものであると、その
伸縮性が一般にゴム材料よりも小さいために、破裂圧力
の大きさを比較的容易に制御することが可能となる。As a functional film having such a function,
As described in claim 2, it is preferable that a water-repellent treatment is performed on a film-shaped porous body made of a resin material, and when the functional film is made of a resin material, Since the elasticity is generally smaller than that of the rubber material, the magnitude of the burst pressure can be controlled relatively easily.
【００１１】また、請求項３に記載したように、機能膜
が圧力容器の内圧を受けて変形したときに接触してその
破裂を促進させる突起等よりなる機能膜破裂促進部が機
能膜取付側に設けられると、機能膜の破裂のタイミング
を一層特定し易くなる。According to a third aspect of the present invention, when the functional membrane is deformed by receiving the internal pressure of the pressure vessel, the functional membrane rupture accelerating portion comprising a projection or the like which contacts and accelerates the rupture of the functional membrane is provided on the functional membrane mounting side. In this case, it becomes easier to specify the timing of the rupture of the functional film.
【００１２】尚、本件出願には、以下の技術的事項が含
まれる。Incidentally, the present application includes the following technical matters.
【００１３】すなわち、上記目的を達成するため、本件
出願が提案する一の発明は、一次、二次電池、コンデン
サーおよび燃料電池用の封口板について、従来技術にお
ける防爆機能を持たせたシール材（防爆弁）を廃止し、
機能膜を有し、機能膜に耐圧性を持たせ、コンデンサー
の内圧が異常に上昇した場合、シール材が破裂してコン
デンサー機能を停止させていた役割を機能膜に付加した
ことを特徴とするものであり、また、封口板の本体側に
円筒状の突起を設け、その径寸法と高さを任意に寸法設
定し、機能膜の破裂圧力を制御することが可能なことを
特徴とするものである。That is, in order to achieve the above object, one invention proposed by the present application is to provide a sealing material for an explosion-proof function in the prior art for a sealing plate for a primary, a secondary battery, a capacitor and a fuel cell. Explosion-proof valve)
It has a functional film, and the functional film has a pressure resistance, and when the internal pressure of the capacitor rises abnormally, the sealing material bursts and the function of stopping the capacitor function is added to the functional film. In addition, a cylindrical projection is provided on the main body side of the sealing plate, and the diameter and height thereof can be arbitrarily set to control the burst pressure of the functional film. It is.
【００１４】また、以下の特徴を有するものでもある。 シール材（防爆弁）を廃止する。 機能膜は以下のようなものである。 ・ＰＴＦＥ製の連続多孔質体の膜で、撥水処理を実施し
たもの。 ・この機能膜は液体を透過せず、気体を透過する性質を
有する。 通常の内圧に対し、内圧が異常上昇した場合の破裂
圧力を任意に設定できる。Further, the present invention has the following features. Seal material (explosion-proof valve) is abolished. The functional film is as follows. -A film of a continuous porous body made of PTFE and subjected to a water-repellent treatment. -This functional film has a property of permeating gas, not permeating liquid. The burst pressure when the internal pressure rises abnormally with respect to the normal internal pressure can be set arbitrarily.
【００１５】[0015]
【発明の実施の形態】つぎに本発明の実施例を図面にし
たがって説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.
【００１６】図１は、本発明の実施例に係る封口板１の
平面図を示しており、そのＡ−Ａ線断面図が図２に示さ
れている。また、図３は図１におけるＢ−Ｂ線拡大半裁
断面図であって、ブリーザ部５の半裁断面図である。FIG. 1 is a plan view of a sealing plate 1 according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. FIG. 3 is an enlarged half sectional view taken along line BB in FIG. 1, and is a half sectional view of the breather unit 5.
【００１７】当該実施例に係る封口板（シールプレート
とも称する）１は、電池（一次電池および二次電池を含
む）、燃料電池、コンデンサー（キャパシタを含む）ま
たは電気二重層等の圧力容器（図示せず、上記従来技術
に係る図４参照）におけるケースの開口部を閉塞するも
のであって、以下のように構成されている。A sealing plate (also referred to as a seal plate) 1 according to the embodiment is a pressure vessel (see FIG. 1) such as a battery (including a primary battery and a secondary battery), a fuel cell, a capacitor (including a capacitor), or an electric double layer. It is not shown, but closes the opening of the case in the prior art (see FIG. 4 according to the prior art), and is configured as follows.
【００１８】すなわち先ず、上記圧力容器の開口部を閉
塞する蓋状の封口板本体（狭義の封口板とも称する）２
が設けられており、この封口板本体２が、ベークライト
またはポリフェニレンサルファイド（ＰＰＳ）等の所定
の高分子材料よりなる樹脂材料によって円板状の成形品
として成形されている。First, a lid-shaped sealing plate body (also referred to as a sealing plate in a narrow sense) 2 for closing the opening of the pressure vessel.
The sealing plate body 2 is formed as a disk-shaped molded product from a resin material made of a predetermined polymer material such as bakelite or polyphenylene sulfide (PPS).
【００１９】図１に示すように、この封口板本体２の平
面を時計の文字盤に見立てた場合、その三時位置および
九時位置に一対の電極端子３，３が設けられており、十
二時位置にブリーザ部５が設けられている。防爆弁は別
個に設けられていない。As shown in FIG. 1, when the flat surface of the sealing plate main body 2 is regarded as a clock face, a pair of electrode terminals 3, 3 are provided at the three o'clock position and the nine o'clock position. A breather unit 5 is provided at the two o'clock position. Explosion-proof valves are not provided separately.
【００２０】図２に示すように、一対の電極端子３，３
はそれぞれ、樹脂製の封口板本体２に対してその厚さ方
向に貫通するように埋設されたアルミ製の端子として設
けられており、その外周面に、封口板本体２に対する抜
止め作用をなすための埋設鍔部４が一体に設けられてい
る。As shown in FIG. 2, a pair of electrode terminals 3, 3
Are provided as aluminum terminals embedded in the resin sealing plate body 2 so as to penetrate the sealing plate body 2 in the thickness direction thereof. Buried flange portion 4 is provided integrally.
【００２１】図３に拡大して示すように、ブリーザ部５
は、以下のように構成されている。As shown in an enlarged manner in FIG.
Is configured as follows.
【００２２】すなわち先ず、封口板本体２の平面上所定
箇所に、その厚さ方向に貫通する孔状の連通流路６が設
けられており、封口板本体２の下面に位置して連通流路
６と同軸上に凹部状の機能膜取付空間７が設けられると
ともにこの機能膜取付空間７の底面部に環状のシール取
付空間８が設けられており、この両取付空間７，８にシ
ール部材９および機能膜１０が挿入されて保持部材１１
によって保持されている。First, a hole-shaped communication channel 6 penetrating in the thickness direction is provided at a predetermined position on the plane of the sealing plate body 2, and the communication channel is located on the lower surface of the sealing plate body 2. A concave functional film mounting space 7 is provided on the same axis as that of the functional film mounting space 6, and an annular seal mounting space 8 is provided on the bottom surface of the functional film mounting space 7. And the holding member 11 into which the functional film 10 is inserted.
Is held by
【００２３】このうち先ず、機能膜１０は、四弗化エチ
レン樹脂（ＰＴＦＥ）製の連続多孔質体の膜であってこ
れに撥水処理を施したものであり、その特性として気体
透過性および液体不透過性を有している。また、この機
能膜１０は、圧力容器の内圧が大気圧よりも高くなった
ときにこの圧力を外部開放するとともに圧力容器の内圧
が大気圧よりも低くなったときに大気を吸入して圧力容
器内を大気圧に保持するように多孔質体によって膜状な
いし平面状に成形されており、また、耐薬品性に優れた
ＰＴＦＥ素材を延伸法により加工して膜状の多孔質体を
成形するとともにこの多孔質体に弗素系薬品をコーティ
ングして撥水処理を施すことにより成形されており、そ
の表面のみならず、多孔質体の内部も弗素系薬品により
撥水処理がなされている。多孔質体の孔の大きさは、実
寸で０．０５〜１μｍ程度とされている。したがって、
これらの条件を満たすことにより、圧力容器の内外の差
圧が０．０１ｋｇ／ｃｍ２程度のときからブリーザ機能
を奏して圧力容器の内圧を一定に保ち、よって比較的長
時間をかけての蓄圧を防止するとともに電解液等の内封
液の漏洩を防止するブリーザが構成されている。First, the functional film 10 is a continuous porous film made of ethylene tetrafluoride resin (PTFE) which has been subjected to a water-repellent treatment. Its characteristics are gas permeability and gas permeability. It has liquid impermeability. When the internal pressure of the pressure vessel becomes higher than the atmospheric pressure, the functional film 10 opens the pressure to the outside, and when the internal pressure of the pressure vessel becomes lower than the atmospheric pressure, sucks the atmosphere to release the pressure vessel. It is formed into a film or a plane by a porous material so as to maintain the inside at atmospheric pressure, and a PTFE material excellent in chemical resistance is processed by a stretching method to form a film-like porous material. At the same time, the porous body is coated with a fluorine-based chemical and subjected to a water-repellent treatment, so that not only the surface thereof but also the inside of the porous body is subjected to the water-repellent treatment with the fluorine-based chemical. The size of the pores of the porous body is about 0.05 to 1 μm in actual size. Therefore,
By satisfying these conditions, when the differential pressure between the inside and outside of the pressure vessel is about 0.01 kg / cm 2, a breather function is performed to keep the internal pressure of the pressure vessel constant, and thus the pressure accumulation over a relatively long time And a leaker for preventing leakage of an enclosed liquid such as an electrolytic solution.
【００２４】この機能膜１０の素材には、上記ＰＴＦＥ
の他に、ポリエチレン、ポリプロピレン、ポリ弗化ビニ
リデン、酢酸セルロース、ポリスルホン、ポリアクリロ
ニトリル、ポリアミドまたはポリイミド等が適用可能で
あり、その製造方法は材料によって選択され、延伸法、
トラックエッチング法、溶融相分離法、相転換法または
複合膜法等があり、ＰＴＦＥについては上記したように
延伸法が適している。The material of the functional film 10 includes the above-mentioned PTFE
Besides, polyethylene, polypropylene, polyvinylidene fluoride, cellulose acetate, polysulfone, polyacrylonitrile, polyamide or polyimide can be applied, the production method is selected by the material, the stretching method,
There are a track etching method, a melt phase separation method, a phase inversion method, a composite membrane method and the like, and the stretching method is suitable for PTFE as described above.
【００２５】尚、ここに延伸法とは、結晶性ポリマーに
熱をかけたり可塑剤を添加したりして可塑化した後、直
角方向に延伸し、フィルムに歪みを与え、結晶領域の周
辺を広げて細孔を形成させる方法であり、ポリエチレ
ン、ポリプロピレンまたはＰＴＦＥ等の精密濾過膜があ
る。Here, the stretching method means that after the crystalline polymer is plasticized by applying heat or adding a plasticizer, it is stretched in a perpendicular direction to give a strain to the film, and the periphery of the crystal region is formed. This is a method of forming pores by spreading, and there is a microfiltration membrane such as polyethylene, polypropylene or PTFE.
【００２６】また、この機能膜１０は、上記したブリー
ザ機能の他に、圧力容器の内圧が急激に上昇したときに
この機能膜１０が破裂することによって内圧を連通流路
６から外部へ緊急開放する防爆機能を兼ね備えており、
すなわちこの機能膜１０が防爆弁の弁体を兼ねている。In addition to the above-described breather function, the functional film 10 bursts when the internal pressure of the pressure vessel suddenly rises, so that the internal pressure is urgently released from the communication channel 6 to the outside. It also has an explosion-proof function to
That is, the functional film 10 also serves as a valve element of the explosion-proof valve.
【００２７】また、この防爆機能に関連して、封口板本
体２には、連通流路６の下端開口周縁であってシール収
容空間８の内周側に位置して突起状の機能膜破裂促進部
１２が機能膜１０に向けて一体に設けられている。In connection with the explosion-proof function, the sealing plate main body 2 is located on the inner peripheral side of the seal accommodating space 8 at the periphery of the lower end opening of the communication channel 6 to promote the rupture of the protruding functional film. The part 12 is provided integrally with the functional film 10.
【００２８】この機能膜破裂促進部１２は、機能膜１０
が圧力容器の内圧を受けて変形したときにこの機能膜破
裂促進部１２に接触してその破裂を促進させるために設
けられており、当該実施例では、この機能膜破裂促進部
１２が断面略矩形状を呈する環状の突起として設けられ
ている。突起の内径寸法φａは１．５〜２．５ｍｍ、突
起の高さｂは０．２〜１．０ｍｍ程度の大きさが好適で
あるが、機能膜１０の材質や物性によっては上記寸法以
外でも適用が可能である。The functional film rupture accelerating portion 12 includes the functional film 10
Is provided for contacting and promoting the rupture of the functional membrane rupture accelerating portion 12 when deformed by receiving the internal pressure of the pressure vessel. In this embodiment, the functional membrane rupture accelerating portion 12 has a substantially cross-sectional shape. It is provided as an annular projection having a rectangular shape. The inner diameter dimension φa of the projection is preferably 1.5 to 2.5 mm, and the height b of the projection is preferably about 0.2 to 1.0 mm. However, depending on the material and physical properties of the functional film 10, other dimensions may be used. Applicable.
【００２９】尚、機能膜１０が圧力容器の内圧を受けて
変形する以前の状態においては、シール部材９および保
持部材１１間に保持された機能膜１０と機能膜破裂促進
部１２との間には図示したように若干の間隙１３が設け
られており、このとき機能膜１０は機能膜破裂促進部１
２に対して非接触とされている。そして、機能膜１０が
圧力容器の内圧の上昇を受けて或る程度変形すると機能
膜破裂促進部１２に接触し、押し付けられ、やがて破裂
する。このように機能膜１０と機能膜破裂促進部１２と
の間に当初、間隙１３を設定するのは、保持部材１１に
よって封口板本体２に押し付けられるシール部材９に所
定の大きさのシール面圧を発生させるためであり、また
機能膜破裂促進部１２に対する機能膜１０の接触を必要
最小限にとどめて事前の破損を極力防止する趣旨であ
る。In a state before the functional film 10 is deformed by receiving the internal pressure of the pressure vessel, the functional film 10 held between the sealing member 9 and the holding member 11 and the functional film rupture promoting portion 12 Is provided with a slight gap 13 as shown in FIG.
2 is non-contact. Then, when the functional film 10 is deformed to some extent due to an increase in the internal pressure of the pressure vessel, the functional film 10 comes into contact with the functional film rupture accelerating portion 12, is pressed, and eventually ruptures. The gap 13 is initially set between the functional film 10 and the functional film rupture accelerating portion 12 because the sealing member 9 pressed against the sealing plate body 2 by the holding member 11 has a predetermined sealing surface pressure. The purpose of this is to minimize the contact of the functional film 10 with the functional film rupture accelerating portion 12 as much as possible and to prevent the damage in advance as much as possible.
【００３０】シール部材９は、シリコンゴム、エチレン
プロピレンジエンゴムまたはＶＭＱ等の所定のゴム状弾
性材をもって環状に成形されており、機能膜１０の外周
や封口板本体２と保持部材１１の間を伝って液体が通過
するのを防止する。図示したシール部材９には、シール
性を一層高めるべく、その上下面にそれぞれ環状のビー
ド部９ａが一体に設けられている。The seal member 9 is formed in a ring shape with a predetermined rubber-like elastic material such as silicon rubber, ethylene propylene diene rubber or VMQ, so that the outer periphery of the functional film 10 and the gap between the sealing plate main body 2 and the holding member 11 are formed. Prevents liquid from passing through. The illustrated seal member 9 is provided with annular bead portions 9a integrally on upper and lower surfaces thereof to further enhance the sealing performance.
【００３１】また、保持部材１１は、ＰＰＳ等の所定の
高分子材料よりなる樹脂材料またはアルミ材料等をもっ
て環状に成形されており、機能膜取付空間７にその内側
から所定の圧入代をもって圧入固定されている。その機
能は、上記したようにシール部材９および機能膜１０を
取付空間７，８内に保持するとともに、シール部材９を
適度に圧縮して所定のシール面圧を発生させることにあ
る。この保持部材１１の封口板本体２に対する固定方法
は、上記した圧入の他に、溶着また接着等であっても良
い。また、その内周空間１１ａは、連通流路６とともに
通気流路の一部をなしている。The holding member 11 is formed in a ring shape from a resin material or an aluminum material made of a predetermined polymer material such as PPS, and is press-fitted into the functional film mounting space 7 from the inside thereof with a predetermined press-fitting allowance. Have been. Its function is to hold the sealing member 9 and the functional film 10 in the mounting spaces 7 and 8 as described above, and to appropriately compress the sealing member 9 to generate a predetermined sealing surface pressure. The method of fixing the holding member 11 to the sealing plate body 2 may be welding, bonding, or the like, in addition to the press-fitting described above. The inner peripheral space 11a forms a part of the ventilation channel together with the communication channel 6.
【００３２】上記構成を備えた封口板１がカシメや溶着
または接着等の手段によって容器本体の開口部に取り付
けられると、ブリーザ部５に設けられた機能膜１０が先
ずはブリーザ機能を備えているために、このブリーザ機
能によって圧力容器の内外が通気せしめられ、すなわち
圧力容器の内圧が大気圧よりも高くなるとこの圧力を外
部開放し、圧力容器の内圧が大気圧よりも低くなると大
気を吸入して圧力容器内を大気圧に保持する。したがっ
て、圧力容器内に予め余剰スペースを設けておかなくて
も電解液等が反応するときの温度上昇やガス発生による
内圧上昇を抑えることができるために、この分、圧力容
器の容積を縮小し、圧力容器を小型化することができ
る。When the sealing plate 1 having the above structure is attached to the opening of the container body by means such as caulking, welding or bonding, the functional film 10 provided on the breather unit 5 has a breather function first. Therefore, the inside and outside of the pressure vessel are ventilated by the breather function, that is, when the internal pressure of the pressure vessel becomes higher than the atmospheric pressure, the pressure is released to the outside, and when the internal pressure of the pressure vessel becomes lower than the atmospheric pressure, the atmosphere is sucked. To maintain the inside of the pressure vessel at atmospheric pressure. Therefore, even if it is not necessary to provide an extra space in the pressure vessel in advance, it is possible to suppress a rise in temperature and a rise in internal pressure due to gas generation when the electrolytic solution or the like reacts. The size of the pressure vessel can be reduced.
【００３３】また、機能膜１０がブリーザ機能とともに
防爆機能を備えているために、ブリーザ部５では賄えな
いほど急激に圧力容器の内圧が上昇したときにこの機能
膜１０が破裂することによって、内圧を連通流路６から
圧力容器の外部へ緊急開放する。したがって、圧力容器
１が異常蓄圧によって爆発するのを防止することができ
る。Since the functional film 10 has an explosion-proof function as well as a breather function, the functional film 10 ruptures when the internal pressure of the pressure vessel rises so rapidly that the breather unit 5 cannot cover it. The internal pressure is urgently released from the communication channel 6 to the outside of the pressure vessel. Therefore, it is possible to prevent the pressure vessel 1 from exploding due to abnormal pressure accumulation.
【００３４】また、ＰＴＦＥ等の樹脂系素材よりなる機
能膜１０は従来のゴム製の防爆弁と比較して伸縮性が小
さいものである。したがって、破裂圧力の大きさを比較
的容易に制御することができる。The functional film 10 made of a resin material such as PTFE has a smaller elasticity than a conventional rubber explosion-proof valve. Therefore, the magnitude of the burst pressure can be controlled relatively easily.
【００３５】また、封口板本体２における連通流路６の
下端開口周縁であってシール収容空間８の内周側に突起
状の機能膜破裂促進部１２が機能膜１０に向けて一体に
設けられているために、機能膜１０は圧力容器の内圧上
昇を受けて変形すると、この機能膜破裂促進部１２に接
触し押し付けられて確実に破裂する。したがって、機能
膜１０が破裂するタイミングを特定し易くなるために、
破裂圧力の大きさを一層容易に制御することができる。Further, a protruding functional film rupture accelerating portion 12 is provided integrally with the functional film 10 on the inner peripheral side of the seal accommodating space 8 on the peripheral edge of the lower end opening of the communication channel 6 in the sealing plate body 2. Therefore, when the functional film 10 is deformed due to an increase in the internal pressure of the pressure vessel, the functional film 10 comes into contact with the functional film rupture accelerating portion 12 and is ruptured reliably. Therefore, in order to easily specify the timing at which the functional film 10 ruptures,
The magnitude of the burst pressure can be more easily controlled.
【００３６】尚、この機能膜破裂促進部１２の断面形状
は図示した矩形のものに限られず、Ｖ字、Ｕ字または三
角形など、尖端状のものであっても良い。また、環状で
なく円周上の一箇所または複数箇所に突起を設けるもの
であっても良い。The sectional shape of the functional film rupture accelerating portion 12 is not limited to the rectangular shape shown in the figure, but may be a pointed shape such as a V-shaped, U-shaped or triangular shape. Also, the projection may be provided at one or more locations on the circumference instead of the ring.
【００３７】更にまた、上記実施例においては、機能膜
１０がブリーザ機能および防爆機能の双方を発揮するた
めに、単一機能を備えたブリーザ部および防爆弁を併設
する必要がない。したがって、これらを併設する場合と
比較して占有スペースを縮小したり、部品点数や組付け
工数を削減したりすることのできる効果もある。Furthermore, in the above embodiment, since the functional film 10 exhibits both the breather function and the explosion-proof function, it is not necessary to provide a breather unit having a single function and an explosion-proof valve. Therefore, there is also an effect that the occupied space can be reduced and the number of parts and the number of assembling steps can be reduced as compared with the case where these are installed together.
【００３８】[0038]
【発明の効果】本発明は、以下の効果を奏する。The present invention has the following effects.
【００３９】すなわち先ず、上記構成を備えた本発明の
請求項１による封口板においては、機能膜がブリーザ機
能を備えているために、このブリーザ機能によって圧力
容器の内外が通気せしめられ、すなわち圧力容器の内圧
が大気圧よりも高くなるとこの圧力を外部開放し、圧力
容器の内圧が大気圧よりも低くなると大気を吸入して圧
力容器内を大気圧に保持する。したがって、圧力容器内
に予め上昇圧力吸収用の余剰スペースを設けておかなく
ても電解液等が反応するときの温度上昇やガス発生によ
る内圧上昇を抑えることができるために、この分、圧力
容器の容積を縮小し、圧力容器を小型化することができ
る。First, in the sealing plate according to the first aspect of the present invention having the above structure, since the functional film has a breather function, the inside and outside of the pressure vessel are ventilated by the breather function, When the internal pressure of the container becomes higher than the atmospheric pressure, the pressure is released to the outside, and when the internal pressure of the pressure container becomes lower than the atmospheric pressure, the air is sucked and the inside of the pressure container is maintained at the atmospheric pressure. Therefore, even if it is not necessary to provide an extra space for absorbing the rising pressure in the pressure vessel in advance, it is possible to suppress a rise in temperature and a rise in internal pressure due to gas generation when the electrolyte or the like reacts. And the pressure vessel can be reduced in size.
【００４０】また、機能膜がブリーザ機能の他に防爆機
能を備えているために、ブリーザ部では賄えないほど急
激に圧力容器の内圧が上昇したときに機能膜が破裂する
ことによって、内圧を連通流路から圧力容器の外部へ緊
急開放する。したがって、圧力容器が異常蓄圧によって
爆発するのを未然に防止することができる。Further, since the functional film has an explosion-proof function in addition to the breather function, when the internal pressure of the pressure vessel rises so rapidly that the breather cannot cover the internal pressure, the internal pressure is reduced. Emergency release from the communication channel to the outside of the pressure vessel. Therefore, it is possible to prevent the pressure vessel from exploding due to abnormal pressure accumulation.
【００４１】また、機能膜がブリーザ機能および防爆機
能の双方を備えているために、単一機能を備えたブリー
ザ部および防爆弁を個別に設ける必要がない。したがっ
て両者を個別に設ける場合と比較して、占有スペースを
縮小したり、部品点数や組付け工数を削減したりするこ
とができる。Further, since the functional film has both a breather function and an explosion-proof function, it is not necessary to separately provide a breather unit having a single function and an explosion-proof valve. Therefore, the occupied space can be reduced and the number of parts and the number of assembling steps can be reduced as compared with the case where both are provided separately.
【００４２】またこれに加えて、上記構成を備えた本発
明の請求項２による封口板においては、機能膜が樹脂系
素材よりなる膜状の多孔質体に撥水処理を施したもので
あるために、この機能膜はその伸縮性が一般にゴム材料
よりも小さいものである。したがって、破裂圧力の大き
さを比較的容易に制御することが可能となる。In addition to the above, in the sealing plate according to the second aspect of the present invention having the above structure, the functional film is obtained by performing a water-repellent treatment on a film-like porous body made of a resin material. Therefore, this functional film generally has a lower elasticity than a rubber material. Therefore, the magnitude of the burst pressure can be controlled relatively easily.
【００４３】また、上記構成を備えた本発明の請求項３
による封口板においては、機能膜が圧力容器の内圧を受
けて変形したときに接触してその破裂を促進させる突起
等よりなる機能膜破裂促進部が機能膜取付側に設けられ
ているために、機能膜の破裂のタイミングを特定し易く
なる。したがって、破裂圧力の大きさを一層容易に制御
することが可能となる。Also, the present invention has the above-mentioned structure.
In the sealing plate, because the functional membrane rupture promoting portion consisting of a projection or the like that contacts when the functional membrane is deformed by receiving the internal pressure of the pressure vessel and promotes the rupture is provided on the functional membrane mounting side, It becomes easier to specify the timing of the rupture of the functional film. Therefore, the magnitude of the burst pressure can be more easily controlled.
【図１】本発明の実施例に係る封口板の平面図FIG. 1 is a plan view of a sealing plate according to an embodiment of the present invention.
【図２】図１におけるＡ−Ａ線断面図FIG. 2 is a sectional view taken along line AA in FIG.
【図３】図１におけるＢ−Ｂ線拡大半裁断面図FIG. 3 is an enlarged half sectional view taken along line BB in FIG. 1;
【図４】従来例に係る封口板の装着状態を示す断面図FIG. 4 is a cross-sectional view showing a mounted state of a sealing plate according to a conventional example.
１ 封口板 ２ 封口板本体 ３ 電極端子 ４ 埋設鍔部 ５ ブリーザ部 ６ 連通流路 ７ 機能膜取付空間 ８ シール取付空間 ９ シール部材 ９ａ ビード部 １０ 機能膜 １１ 保持部材 １１ａ 内周空間 １２ 機能膜破裂促進部 １３ 間隙 DESCRIPTION OF SYMBOLS 1 Sealing plate 2 Sealing plate main body 3 Electrode terminal 4 Buried flange part 5 Breather part 6 Communication channel 7 Functional membrane mounting space 8 Seal mounting space 9 Sealing member 9a Bead part 10 Functional film 11 Holding member 11a Inner peripheral space 12 Functional film rupture Promoter 13 gap
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） // Ｆ１７Ｃ 13/06 ３０１ Ｈ０１Ｇ 9/00 ３０１Ｚ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI theme coat ゛ (reference) // F17C 13/06 301 H01G 9/00 301Z
Claims (3)
圧力容器の開口部を閉塞する封口板（１）であって、前
記圧力容器の内外を連通する連通流路（６）と、前記連
通流路（６）を遮断するように配置される機能膜（１
０）とを有し、 前記機能膜（１０）が、気体透過性および液体不透過性
を有して前記圧力容器の内外を通気させるブリーザ機能
と、前記圧力容器の内圧が急激に上昇したときにこの機
能膜（１０）が破裂することによって前記内圧を外部へ
緊急開放する防爆機能とを兼ね備えていることを特徴と
する封口板。1. A sealing plate (1) for closing an opening of a pressure vessel for accommodating a container such as a battery element and an electrolyte, and a communication flow path (6) for communicating between inside and outside of the pressure vessel. The functional membrane (1) arranged so as to block the communication channel (6)
0), wherein the functional membrane (10) has a gas-permeable and liquid-impermeable breather function for ventilating the inside and outside of the pressure vessel, and when the internal pressure of the pressure vessel sharply rises A sealing plate having an explosion-proof function of urging the internal pressure to the outside by rupture of the functional film (10).
質体に撥水処理を施したものであることを特徴とする封
口板。2. The sealing plate according to claim 1, wherein the functional film (10) is a film-shaped porous body made of a resin material and subjected to a water-repellent treatment.
ときに接触してその破裂を促進させる突起等よりなる機
能膜破裂促進部（１２）が機能膜取付側に設けられてい
ることを特徴とする封口板。3. The functional film rupture accelerating portion according to claim 1, wherein the functional film (10) comes into contact when the internal pressure of the pressure vessel is deformed and deforms to contact and promote the rupture thereof. (12) The sealing plate, wherein the sealing plate is provided on the functional film mounting side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001057700A JP2002260622A (en) | 2001-03-02 | 2001-03-02 | Seal plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001057700A JP2002260622A (en) | 2001-03-02 | 2001-03-02 | Seal plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002260622A true JP2002260622A (en) | 2002-09-13 |
Family
ID=18917538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001057700A Withdrawn JP2002260622A (en) | 2001-03-02 | 2001-03-02 | Seal plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002260622A (en) |
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| KR20190072481A (en) * | 2017-12-14 | 2019-06-25 | 꼼미사리아 아 레네르지 아토미끄 에뜨 옥스 에너지스 앨터네이티브즈 | System for monitoring gases in a battery pack, associated metal-ion electrochemical accumulator comprising a terminal-forming bushing for incorporating a safety vent for the monitoring system |
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2001
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| JP2007035813A (en) * | 2005-07-26 | 2007-02-08 | Matsushita Electric Ind Co Ltd | Capacitor |
| JP2007035815A (en) * | 2005-07-26 | 2007-02-08 | Matsushita Electric Ind Co Ltd | Capacitor |
| JP2010245463A (en) * | 2009-04-10 | 2010-10-28 | Shin-Etsu Chemical Co Ltd | Sealing rubber for electrolytic capacitor |
| EP2554882A1 (en) * | 2011-08-03 | 2013-02-06 | ElringKlinger AG | Pressure compensation element for a housing of an electrochemical device |
| JP2017084974A (en) * | 2015-10-28 | 2017-05-18 | ニチコン株式会社 | Sealing body and electrolytic capacitor |
| KR20190072481A (en) * | 2017-12-14 | 2019-06-25 | 꼼미사리아 아 레네르지 아토미끄 에뜨 옥스 에너지스 앨터네이티브즈 | System for monitoring gases in a battery pack, associated metal-ion electrochemical accumulator comprising a terminal-forming bushing for incorporating a safety vent for the monitoring system |
| JP2019145490A (en) * | 2017-12-14 | 2019-08-29 | コミッサリア ア レネルジー アトミーク エ オ ゼネルジ ザルタナテイヴ | System for monitoring gas in battery pack, relevant metal ion electrochemical accumulator battery including terminal formation bushing incorporating safety vent for monitoring system |
| KR102172286B1 (en) * | 2017-12-14 | 2020-11-02 | 꼼미사리아 아 레네르지 아토미끄 에뜨 옥스 에너지스 앨터네이티브즈 | System for monitoring gases in a battery pack, associated metal-ion electrochemical accumulator comprising a terminal-forming bushing for incorporating a safety vent for the monitoring system |
| CN109920953A (en) * | 2019-03-27 | 2019-06-21 | 蜂巢能源科技有限公司 | Battery pack explosion-proof valve, battery pack and vehicle |
| CN109920953B (en) * | 2019-03-27 | 2021-11-19 | 蜂巢能源科技有限公司 | Battery pack explosion-proof valve, battery pack and vehicle |
| JP2022529937A (en) * | 2019-04-15 | 2022-06-27 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Battery pack with pressure management system including compensation device |
| JP7228715B2 (en) | 2019-04-15 | 2023-02-24 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Battery pack with pressure management system including compensation device |
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