JP2006156868A - Pressure release valve - Google Patents

Pressure release valve Download PDF

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JP2006156868A
JP2006156868A JP2004348278A JP2004348278A JP2006156868A JP 2006156868 A JP2006156868 A JP 2006156868A JP 2004348278 A JP2004348278 A JP 2004348278A JP 2004348278 A JP2004348278 A JP 2004348278A JP 2006156868 A JP2006156868 A JP 2006156868A
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pressure release
valve
pressure
valve body
release port
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Kazuo Yamashita
和雄 山下
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Nok Corp
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Nok Corp
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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
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact pressure release valve that is miniaturized compared with a conventional one in which a reinforcing ring is embedded in the peripheral base thereof. <P>SOLUTION: The pressure release valve comprises: a valve body 2 disposed inside the pressure release opening 10 of a sealing board 1; and a support member 3 for fixing the valve body 2 to the pressure release opening 10 by supporting a supported part 23 which is formed on the inner periphery and projects towards the outside of the pressure release opening 10. The valve body 2 has a seal lip 22 which closely contacts the inner peripheral surface of the pressure release opening 10 to perform valve opening operation when subjected to a given internal pressure in an inner space S of the sealing board 1, and the support member 3 has a plate spring 32 which is press-fitted into the inner peripheral surface of the pressure release opening 10. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、例えば、電池（一次電池及び二次電池を含む）、燃料電池、コンデンサ等の電気又は電子部品における圧力容器、あるいは一般機器の圧力容器の封口板に設けられる圧力開放弁に関するものである。   The present invention relates to a pressure release valve provided on a pressure vessel in an electric or electronic component such as a battery (including a primary battery and a secondary battery), a fuel cell, a capacitor, or a pressure plate of a general equipment. is there.

密閉型のアルミ電解コンデンサあるいは電気二重層型コンデンサ等は、その素子本体を収容した圧力容器の開口部が、ガスケットを介して封着された封口板によって閉塞されている。そして、このように完全な密閉構造にすると、急激な負荷が加わった場合に、ジュール発熱によって容器の内圧が上昇し、コンデンサの機能低下や寿命低下を来すおそれがあることから、封口板には、封入液の蒸発や外部からの異物等の侵入を防止すると共に、内圧上昇時に圧力開放機能を奏する圧力開放弁が設けられており、その典型的な従来技術が、下記の特許文献１及び特許文献２に開示されている。
ＷＯ０３／０４４３９７ Ａ１ 特開２００４−１９０８０２ In a sealed aluminum electrolytic capacitor, an electric double layer capacitor, or the like, the opening of a pressure vessel that houses the element body is closed by a sealing plate that is sealed with a gasket. And, with such a completely sealed structure, when a sudden load is applied, the internal pressure of the container rises due to Joule heat generation, and there is a possibility that the function of the capacitor may be reduced and the life of the capacitor may be reduced. Is provided with a pressure release valve that prevents evaporation of the encapsulated liquid and the entry of foreign matter from the outside, and also provides a pressure release function when the internal pressure rises. It is disclosed in Patent Document 2.
WO03 / 044397 A1 JP 2004-190802 A

図４は、特許文献１に記載された従来の圧力開放弁の一例を示す断面図である。この圧力開放弁は、封口板２０２に開設された圧力開放口１０１内に軸部１０２が同心的に設けられ、前記圧力開放口１０１内に弁本体１０３が密嵌固定され、この弁本体１０３は、ゴム状弾性材料で成形されたものであって、圧力開放口１０１の内周面１０１ａに適当な締め代をもって密嵌された基部１０３ａと、その内周から延びて圧力容器の外側を向くと共に前記軸部１０２の外周面に所定の緊迫力で密接されたシールリップ１０３ｂからなる。基部１０３ａには、圧力開放口１０１の内周面１０１ａへの嵌着力を確保するための補強環１０３ｃが埋設されている。   FIG. 4 is a cross-sectional view showing an example of a conventional pressure release valve described in Patent Document 1. As shown in FIG. In this pressure release valve, a shaft portion 102 is concentrically provided in a pressure release port 101 provided in a sealing plate 202, and a valve body 103 is tightly fitted and fixed in the pressure release port 101. A base portion 103a which is molded from a rubber-like elastic material and is tightly fitted to the inner peripheral surface 101a of the pressure release port 101 with an appropriate tightening margin, and extends from the inner periphery to face the outside of the pressure vessel. The seal lip 103b is in close contact with the outer peripheral surface of the shaft 102 with a predetermined pressing force. In the base 103a, a reinforcing ring 103c for embedding the fitting force of the pressure release port 101 on the inner peripheral surface 101a is embedded.

すなわち、この圧力開放弁は、通常はシールリップ１０３ｂが圧力開放口１０１の軸部１０２の外周面に密接することにより圧力容器内を密閉しており、圧力容器の内圧が所定値を超えて上昇した場合にシールリップ１０３ｂが軸部１０２の外周面から開いて、前記内圧を大気開放するものである。   That is, this pressure release valve normally seals the inside of the pressure vessel by the seal lip 103b being in close contact with the outer peripheral surface of the shaft portion 102 of the pressure release port 101, and the internal pressure of the pressure vessel rises above a predetermined value. In this case, the seal lip 103b opens from the outer peripheral surface of the shaft portion 102 to release the internal pressure to the atmosphere.

ところで、近年において、密閉型の電解コンデンサやキャパシタは、形状が扁平化あるいは小型化される傾向がある。図５は、扁平化された電解コンデンサ２００の一例を示すもので、（Ａ）は平面図、（Ｂ）は正面図である。すなわちこのコンデンサにおいて、参照符号２０１はケース（圧力容器）、２０２は封口板、２０３は封口板２０２に設けられた電極端子、２０４は封口板２０２における圧力開放弁の装着スペースで、この電解コンデンサ２００は、平面形状が長円形状をなしている。   By the way, in recent years, sealed electrolytic capacitors and capacitors tend to be flattened or downsized. FIG. 5 shows an example of a flattened electrolytic capacitor 200, where (A) is a plan view and (B) is a front view. That is, in this capacitor, reference numeral 201 is a case (pressure vessel), 202 is a sealing plate, 203 is an electrode terminal provided on the sealing plate 202, and 204 is a space for mounting the pressure release valve on the sealing plate 202. The planar shape has an oval shape.

ところが、このように扁平化あるいは小型化された電解コンデンサ２００では、封口板２０２における圧力開放弁の装着スペース２０４が小さくなるため、図４のような従来構造の圧力開放弁を設けることが困難となる。これは、圧力開放口１０１の内周に軸部１０２が存在することによって、それほど小径化できないからである。また、弁本体１０３が、その外周基部１０３ａを圧力開放口１０２の内周面に適当な締め代をもって密嵌させるために、補強環１０３ｃが埋設された構造であることも、弁本体１０３の小径化を困難にしている原因となっている。更には、シールリップ１０３ｂの経時的な緊迫力の減少による開弁圧の低下を補償するために、シールリップ１０３ｂにはエキステンションスプリング１０３ｄが装着されており、このエキステンションスプリング１０３ｄの存在も、弁本体１０３の小径化を困難にしていた。   However, in the electrolytic capacitor 200 flattened or miniaturized in this way, the pressure relief valve mounting space 204 in the sealing plate 202 is small, and therefore it is difficult to provide a conventional pressure relief valve as shown in FIG. Become. This is because the shaft portion 102 is present on the inner periphery of the pressure release port 101, so that the diameter cannot be reduced so much. Further, the valve body 103 may have a structure in which a reinforcing ring 103c is embedded so that the outer peripheral base portion 103a is closely fitted to the inner peripheral surface of the pressure release port 102 with an appropriate tightening margin. It is the cause that makes it difficult. Furthermore, an extension spring 103d is attached to the seal lip 103b in order to compensate for a decrease in valve opening pressure due to a decrease in the tightening force of the seal lip 103b over time. It has been difficult to reduce the diameter of the valve body 103.

この点、特許文献２に記載された圧力調整弁は、弁本体がゴム状弾性材料単体からなるものであり、圧力開放口（弁孔）に軸部が存在しない構造なので、小径化が可能であるものと思われる。しかしながら、弁本体が笠部の外周突起を、封口板（上蓋）に形成した溝に食い込ませることによって位置決めされると共に、通常圧力時のシールを保つものであるため、内圧上昇時に開弁しにくくなったり、あるいは、圧力開放口（弁孔）への嵌挿状態によって、前記溝に対する笠部の外周突起の面圧がばらつき、このため開弁圧がばらつくことが懸念される。しかも、内圧が、弁本体の内端の鍔部を介して圧力開放通路である横溝をつぶすように作用するので、急激な内圧上昇に対して、圧力開放機能が十分に働かないおそれがある。   In this regard, the pressure regulating valve described in Patent Document 2 has a structure in which the valve body is made of a single rubber-like elastic material and there is no shaft portion in the pressure release port (valve hole), so that the diameter can be reduced. There seems to be. However, since the valve body is positioned by biting the outer peripheral protrusion of the cap portion into the groove formed in the sealing plate (upper lid) and keeps the seal at normal pressure, it is difficult to open when the internal pressure rises There is a concern that the surface pressure of the outer peripheral protrusion of the cap portion with respect to the groove varies depending on the insertion state in the pressure release port (valve hole), and thus the valve opening pressure varies. Moreover, since the internal pressure acts so as to crush the lateral groove, which is the pressure release passage, via the flange at the inner end of the valve body, the pressure release function may not work sufficiently against a sudden increase in internal pressure.

本発明は、以上のような点に鑑みてなされたものであって、その技術的課題は、外周基部に補強環を埋設した従来構造のものに比較して小型化が可能であると共に、安定した圧力開放機能を奏することのできる圧力開放弁を提供することにある。   The present invention has been made in view of the above points, and its technical problem is that it can be downsized and stable as compared with a conventional structure in which a reinforcing ring is embedded in the outer peripheral base. An object of the present invention is to provide a pressure release valve capable of performing the pressure release function.

上述した技術的課題を有効に解決するための手段として、請求項１の発明に係る圧力開放弁は、封口板の圧力開放口に配置された弁本体と、この弁本体の内周部を固定する固定手段からなり、前記弁本体が、前記圧力開放口の内周面に密接され前記封口板の内側空間における所定の内圧により開弁動作するシールリップを有するものである。この構成によれば、弁本体がその内周部において固定手段を介して圧力開放口内に固定されるため、圧力開放口への嵌着力を付与する補強環の埋設が不要であり、シールリップが圧力開放口の内周面に密接されるものであるため、圧力開放口の内周に軸部を形成する必要もない。また、圧力開放口への弁本体の挿入によるシールリップの面圧のばらつき等も殆ど生じることがなく、シールリップの経時的な面圧低下も小さいので、面圧低下を補償するためのスプリング等を設ける必要もない。   As a means for effectively solving the technical problem described above, the pressure release valve according to the invention of claim 1 fixes the valve body disposed at the pressure release port of the sealing plate and the inner peripheral portion of the valve body. The valve body has a seal lip that is in close contact with the inner peripheral surface of the pressure release port and opens the valve by a predetermined internal pressure in the inner space of the sealing plate. According to this configuration, since the valve main body is fixed in the pressure release port via the fixing means at the inner peripheral portion thereof, there is no need to embed a reinforcing ring that provides a fitting force to the pressure release port. Since it is in close contact with the inner peripheral surface of the pressure release port, it is not necessary to form a shaft portion on the inner periphery of the pressure release port. Also, there is almost no variation in the surface pressure of the seal lip due to the insertion of the valve body into the pressure release port, and the decrease in surface pressure over time of the seal lip is small, so a spring etc. to compensate for the decrease in surface pressure It is not necessary to provide

請求項２の発明に係る圧力開放弁は、請求項１に記載の構成において、弁本体の内周部に圧力開放口の外側を向いて突出した被支持部が形成され、固定手段が、弁本体の外側で前記圧力開放口に固定されて前記被支持部を支持するものである。したがってこの構成においては、装着の際には、圧力開放口に弁本体を挿入してから、固定手段を圧力開放口に固定すれば良い。このとき、シールリップの径方向の反発力によって弁本体が容易に調芯されるため、精度良く装着することができる。   According to a second aspect of the present invention, there is provided the pressure relief valve according to the first aspect, wherein a supported portion that protrudes toward the outside of the pressure relief opening is formed on the inner peripheral portion of the valve body, and the fixing means is the valve It is fixed to the pressure release port outside the main body and supports the supported portion. Therefore, in this configuration, at the time of mounting, the valve body may be inserted into the pressure release port and then the fixing means may be fixed to the pressure release port. At this time, the valve main body is easily aligned by the repulsive force in the radial direction of the seal lip, so that it can be mounted with high accuracy.

請求項３の発明に係る圧力開放弁は、請求項１に記載の固定手段が、圧力開放口の内周面に圧入嵌着される板ばねを有するものである。この構成においては、固定手段は圧力開放口に圧入するだけで固定される。   According to a third aspect of the present invention, there is provided a pressure release valve in which the fixing means according to the first aspect has a leaf spring that is press-fitted into the inner peripheral surface of the pressure release port. In this configuration, the fixing means is fixed simply by being press-fitted into the pressure release port.

請求項４の発明に係る圧力開放弁は、請求項１に記載の固定手段が、弁本体の内周の基部を支持する支持突部を有するものである。この構成においては、請求項２と同様、装着の際には、圧力開放口に弁本体を挿入してから、固定手段を圧力開放口に固定すれば良い。このとき、シールリップの径方向の反発力によって弁本体が容易に調芯されるため、精度良く装着することができる。   According to a fourth aspect of the present invention, in the pressure release valve according to the first aspect, the fixing means according to the first aspect has a support protrusion that supports the base of the inner periphery of the valve body. In this configuration, similarly to the second aspect, when mounting, the valve body may be inserted into the pressure release port and then the fixing means may be fixed to the pressure release port. At this time, the valve main body is easily aligned by the repulsive force in the radial direction of the seal lip, so that it can be mounted with high accuracy.

請求項１の発明に係る圧力開放弁によれば、圧力開放口及び弁本体の小径化を図ると共に、安定した圧力開放機能を実現することができる。   According to the pressure release valve of the first aspect of the invention, the diameter of the pressure release port and the valve body can be reduced, and a stable pressure release function can be realized.

請求項２〜４の発明に係る圧力開放弁によれば、簡易な構造で圧力開放口に対する弁本体の抜け止め及び位置決めを行うことができる。   According to the pressure release valve according to the inventions of claims 2 to 4, it is possible to prevent and position the valve body with respect to the pressure release port with a simple structure.

以下、本発明に係る圧力開放弁の好ましい実施の形態について、図面を参照しながら詳細に説明する。図１は、本発明の形態として、電解コンデンサ（キャパシタ）等の封口板に設けられる圧力開放弁を、封口板の厚さ方向に切断して示す断面図、図２は、図１におけるII方向の矢視図、図３は、弁本体の断面斜視図である。   Hereinafter, preferred embodiments of a pressure relief valve according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view showing a pressure release valve provided on a sealing plate such as an electrolytic capacitor (capacitor) as a form of the present invention, cut in the thickness direction of the sealing plate, and FIG. 2 is a direction II in FIG. FIG. 3 is a cross-sectional perspective view of the valve body.

まず図１において、参照符号１は電解コンデンサ等のケースの内部空間Ｓを閉塞するように、前記ケースに設けられた電気絶縁材料からなる封口板であって、圧力開放口１０が開設されている。圧力開放口１０は、封口板１の厚さ方向中間に位置する円形孔状の弁室部１１と、その内側（内部空間Ｓ側）の着座部１２に開設された複数の分割孔１３と、弁室部１１の外側（内部空間Ｓと反対側）に拡径形成された支持部材装着部１４からなる。分割孔１３は、図２に示されるように、弁室部１１の内周面に沿って並ぶように形成されている。なお、内部空間Ｓは、請求項１に記載された封口板の内側空間に相当するものである。   First, in FIG. 1, reference numeral 1 is a sealing plate made of an electrically insulating material provided in the case so as to close the internal space S of the case such as an electrolytic capacitor, and a pressure release port 10 is opened. . The pressure release port 10 includes a circular hole-shaped valve chamber portion 11 located in the middle of the sealing plate 1 in the thickness direction, and a plurality of divided holes 13 provided in the seating portion 12 on the inner side (the inner space S side), The support member mounting portion 14 is formed to have a diameter expanded outside the valve chamber portion 11 (on the side opposite to the internal space S). As shown in FIG. 2, the divided holes 13 are formed so as to be aligned along the inner peripheral surface of the valve chamber portion 11. The internal space S corresponds to the inner space of the sealing plate described in claim 1.

この形態による圧力開放弁は、圧力開放口１０における弁室部１１内に配置された弁本体２と、この弁本体２の外側で封口板１に固定されて弁本体２を支持する支持部材３と、弁本体２の内側に配置されてこの弁本体２と圧力開放口１０における着座部１２との間に挟持された気液分離体４とからなる。なお、支持部材３は、請求項１に記載された固定手段に相当するものである。   The pressure relief valve according to this embodiment includes a valve body 2 disposed in the valve chamber 11 at the pressure relief port 10 and a support member 3 that supports the valve body 2 by being fixed to the sealing plate 1 outside the valve body 2. And a gas-liquid separator 4 disposed inside the valve body 2 and sandwiched between the valve body 2 and the seat 12 at the pressure release port 10. The support member 3 corresponds to the fixing means described in claim 1.

弁本体２は、例えばブチルゴム、ハロゲン化ブチルゴム、ビニル変性ブチルゴム、エチレンプロピレン系ゴム、フッ素ゴム、アクリル系ゴム、水素添加ニトリルゴム等の飽和系ゴムから選択されて架橋剤、充填剤、可塑剤又は老化防止剤を適宜配合したゴム材料、あるいはオレフィン系熱可塑性エラストマ、エステル系熱可塑性エラストマ、アミド系熱可塑性エラストマ、水素添加スチレン・ブタジエンブロック共重合体、水素添加スチレン・イソプレンブロック共重合体等から選択され、ブロック共重合方法、グラフト共重合方法、動的架橋方法などで製造され、架橋剤、可塑剤、老化防止剤又は充填剤を適宜配合した熱可塑性エラストマ、あるいはフェノール系樹脂と水素化ニトリルゴム、フェノール系樹脂とアクリルゴム、ブチルゴム又はフッ素ゴムとの混合物等から選択される樹脂材料とゴムの混合物又はブロック共重合体又はグラフト共重合体等のエラストマで成形されたものである。また、内部空間Ｓに封入された電解液との反応を抑制するため、塩化イオン・ハロゲン化物の含有率は５００ｐｐｍ以下とし、重金属の含有率も１００μｇ／ｃｍ３以下とするのが好ましい。 The valve body 2 is selected from, for example, saturated rubbers such as butyl rubber, halogenated butyl rubber, vinyl-modified butyl rubber, ethylene propylene rubber, fluorine rubber, acrylic rubber, hydrogenated nitrile rubber, and the like. From rubber materials appropriately blended with anti-aging agents, or olefin-based thermoplastic elastomers, ester-based thermoplastic elastomers, amide-based thermoplastic elastomers, hydrogenated styrene / butadiene block copolymers, hydrogenated styrene / isoprene block copolymers, etc. Selected, block copolymerization method, graft copolymerization method, dynamic cross-linking method, etc., and thermoplastic elastomer or phenolic resin and hydrogenated nitrile appropriately mixed with cross-linking agent, plasticizer, anti-aging agent or filler Rubber, phenolic resin and acrylic rubber, butyl rubber Are those molded from elastomer mixtures or block copolymer or graft copolymer of the resin material and the rubber is selected from the mixture of the fluorine rubber. In order to suppress the reaction with the electrolytic solution sealed in the internal space S, the chloride ion / halide content is preferably 500 ppm or less, and the heavy metal content is preferably 100 μg / cm 3 or less.

そしてこの弁本体２は、圧力開放口１０における着座部１２側（内部空間Ｓ側）を向いた基部２１と、この基部２１の外周から圧力開放口１０の外側へ向けて延びた先端外周部２２ａが圧力開放口１０における弁室部１１の内周面１１ａに密接されるシールリップ２２と、前記基部２１からシールリップ２２の内周側を圧力開放口１０の外側へ向けて突出した被支持部２３からなる。   The valve body 2 includes a base portion 21 facing the seating portion 12 (inside the internal space S) in the pressure release port 10 and a distal end outer peripheral portion 22a extending from the outer periphery of the base portion 21 to the outside of the pressure release port 10. A seal lip 22 that is in close contact with the inner peripheral surface 11a of the valve chamber 11 in the pressure release port 10 and a supported portion that protrudes from the base 21 toward the outside of the pressure release port 10 on the inner peripheral side of the seal lip 22. 23.

弁本体２における基部２１の外径は、圧力開放口１０における弁室部１１の内周面１１ａより適宜小径であって、圧力開放口１０における各分割孔１３を密閉しない径寸法に形成されている。   The outer diameter of the base portion 21 in the valve body 2 is appropriately smaller than the inner peripheral surface 11a of the valve chamber portion 11 in the pressure release port 10, and is formed to have a diameter that does not seal each divided hole 13 in the pressure release port 10. Yes.

弁本体２におけるシールリップ２２は、先端側が大径となるように圧力開放口１０の外側へ向けて円錐状に開いた形状に形成されていて、その外径は、図３に示される未装着状態では、弁室部１１の内周面１１ａより適宜大径である。したがって図１に示される装着状態ではシールリップ２２が内周側へ適当に変形されることにより弁室部１１の内周面１１ａに適当な面圧で密接される。   The seal lip 22 in the valve body 2 is formed in a conical shape toward the outside of the pressure release port 10 so that the tip side has a large diameter, and the outer diameter is not attached as shown in FIG. In the state, the diameter is appropriately larger than the inner peripheral surface 11a of the valve chamber portion 11. Therefore, in the mounted state shown in FIG. 1, the seal lip 22 is appropriately deformed to the inner peripheral side, thereby being brought into close contact with the inner peripheral surface 11 a of the valve chamber portion 11 with an appropriate surface pressure.

弁本体２における被支持部２３は円柱状に形成されたものであって、その先端２３ａは、シールリップ２２の先端よりも外側まで延びている。   The supported portion 23 in the valve body 2 is formed in a columnar shape, and the tip 23 a extends to the outside of the tip of the seal lip 22.

気液分離体４は、例えばガス透過膜やゴムの薄膜や不織布等で円盤状に成形されたものであって、弁本体２の基部２１と、圧力開放口１０における着座部１２との間に挟持された状態に装着されると共に、外周縁が弁室部１１の内周面１１ａに密接されている。なお、ここでいうガス透過膜とは、気体透過性と、液体不透過性の機能を併有する膜である。   The gas-liquid separator 4 is formed in a disk shape with, for example, a gas permeable membrane, a rubber thin film, a nonwoven fabric, or the like, and is interposed between the base portion 21 of the valve body 2 and the seating portion 12 in the pressure release port 10. The outer peripheral edge is in close contact with the inner peripheral surface 11 a of the valve chamber 11 while being mounted in a sandwiched state. The gas permeable membrane here is a membrane having both gas permeable and liquid impermeable functions.

ガス透過膜には、耐薬品性に優れ、かつ撥水性を有する繊維素材又は撥水処理された繊維素材で製作された不織布からなるものや、無数の連続気孔を有するＰＴＦＥ（ポリテトラフルオロエチレン）の膜状又はシート状の多孔質体に撥水処理を施したものなどが好適に採用される。このうち、ＰＴＦＥからなるガス透過膜は、ＰＴＦＥを延伸法により膜状又はシート状の多孔質体に成形し、更に、より顕著な撥水性を付与するために、これに弗素系薬品をコーティングすることにより撥水処理を施して製作され、その表面のみならず、多孔質体内部の連続気泡面にも、より確実な撥水処理がなされたものである。   The gas permeable membrane is made of a non-woven fabric made of a fiber material having excellent chemical resistance and water repellency or a fiber material treated with water repellency, and PTFE (polytetrafluoroethylene) having numerous continuous pores. A film-like or sheet-like porous body that has been subjected to a water-repellent treatment is preferably employed. Among these, a gas permeable membrane made of PTFE is formed by forming PTFE into a film-like or sheet-like porous body by a stretching method, and further coating with a fluorine-based chemical to impart more remarkable water repellency. Thus, water repellent treatment is performed, and not only the surface thereof but also the open cell surface inside the porous body is subjected to more reliable water repellent treatment.

また、ＰＴＦＥのほかにも、ポリエチレン、ポリプロピレン、ポリフッ化ビニリデン（ＰＶＤＦ）、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、ポリアミドイミド等が使用可能であり、その製造方法は材料により、延伸法、トラックエッチング法、溶融相分離法、溶液相分離法、相転換法、又は複合膜法等から選択される。ＰＴＦＥの場合は、上述のように延伸法が適している。なお、延伸法とは、結晶性ポリマを、加熱したり可塑剤を添加して可塑化した後、直角方向に延伸してフィルムに歪を与えることにより、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、ＰＴＦＥ等による精密濾過膜の製造等に用いられている。   In addition to PTFE, polyethylene, polypropylene, polyvinylidene fluoride (PVDF), cellulose acetate, polysulfone, polyacrylonitrile, polyamide, polyamideimide, and the like can be used. Method, melt phase separation method, solution phase separation method, phase conversion method, or composite membrane method. In the case of PTFE, the stretching method is suitable as described above. The stretching method is a method in which a crystalline polymer is plasticized by heating or adding a plasticizer, and then stretched in a perpendicular direction to distort the film, thereby expanding the periphery of the crystalline region to form pores. This is a method of forming a microfiltration membrane made of polyethylene, polypropylene, PTFE or the like.

なお、気液分離体４にゴムの薄膜を用いる場合、その材質は、弁本体２と同じものを採用することができる。   In addition, when using a rubber thin film for the gas-liquid separator 4, the same material as that of the valve body 2 can be adopted.

また、気液分離体４も弁本体２と同様に、内部空間Ｓに封入された電解液との反応を抑制する観点から、塩化イオン・ハロゲン化物の含有率は５００ｐｐｍ以下とし、重金属の含有率も１００μｇ／ｃｍ３以下とするのが好ましい。 Similarly to the valve body 2, the gas-liquid separator 4 has a chloride ion / halide content of 500 ppm or less and a heavy metal content from the viewpoint of suppressing the reaction with the electrolyte solution enclosed in the internal space S. Is preferably 100 μg / cm 3 or less.

支持部材３は、ばね鋼などの金属板を打ち抜きプレス成形したものであって、全体として皿ばね状に形成されており、詳しくは、内周の円盤部３１と、その外周に円周方向等間隔で形成された多数の板ばね３２からなる。板ばね３２は、圧力開放口１０の外側を向くようにテーパ状に屈曲されており、板ばね３２の外接円の径（支持部材３の外径）は、未装着状態では、圧力開放口１０における支持部材装着部１４の内周面１４ａよりも僅かに大径となるように形成されている。   The support member 3 is formed by stamping and pressing a metal plate such as spring steel, and is formed in the shape of a disc spring as a whole. Specifically, the disc portion 31 on the inner circumference and the outer circumference in the circumferential direction, etc. It consists of a large number of leaf springs 32 formed at intervals. The leaf spring 32 is bent in a tapered shape so as to face the outside of the pressure release port 10, and the diameter of the circumscribed circle of the leaf spring 32 (the outer diameter of the support member 3) is the pressure release port 10 when not attached. The support member mounting portion 14 is formed to have a slightly larger diameter than the inner peripheral surface 14a.

そして、この支持部材３は、円盤部３１の内部空間Ｓ側の面が、弁本体２における被支持部２３の先端２３ａに当接すると共に、板ばね３２の先端部が、圧力開放口１０における支持部材装着部１４の内周面１４ａに圧接することにより、弁本体２を圧力開放口１０に対して抜け止め状態に支持するものである。また、各板ばね３２の間のスリット部３３は、圧力開放口１０における弁室部１１の内周面１１ａより内周側まで延びており、これによって、支持部材３における圧力開放通路が確保されている。   In the support member 3, the surface of the disk portion 31 on the inner space S side abuts on the tip 23 a of the supported portion 23 in the valve body 2, and the tip of the leaf spring 32 is supported in the pressure release port 10. The valve main body 2 is supported against the pressure release port 10 by being pressed against the inner peripheral surface 14 a of the member mounting portion 14. Moreover, the slit part 33 between each leaf | plate spring 32 is extended from the inner peripheral surface 11a of the valve chamber part 11 in the pressure release port 10 to the inner peripheral side, and, thereby, the pressure release passage in the support member 3 is ensured. ing.

以上の構成によれば、弁本体２は単一のゴム状弾性材料で成形されたものであって、先に説明した図４に示される従来の技術のような補強環１０３ｃや、軸部１０２等が存在しないため、この従来技術のものに比較して、十分な小径化が可能である。したがって、先に説明した図５に示されるような、電解コンデンサ２００の扁平化あるいは小型化による圧力開放弁装着スペース２０４の縮小にも、十分に対応することができる。   According to the above configuration, the valve body 2 is formed of a single rubber-like elastic material, and the reinforcing ring 103c and the shaft portion 102 as in the prior art shown in FIG. Therefore, it is possible to sufficiently reduce the diameter as compared with the prior art. Therefore, it is possible to sufficiently cope with the reduction of the pressure release valve mounting space 204 due to the flattening or miniaturization of the electrolytic capacitor 200 as shown in FIG.

この形態による圧力開放弁は、装着の際には、圧力開放口１０における弁室部１１に、まず気液分離体４を挿入し、次に弁本体２を、シールリップ２２が外側を向くように（基部２１が内部空間Ｓ側を向くように）挿入してから、支持部材３を、その板ばね３２が圧力開放口１０の外側を向くように、圧力開放口１０における支持部材装着部１４に、円盤部３１が弁本体２の被支持部２３に圧接するまで圧入すれば良い。   When the pressure relief valve according to this embodiment is mounted, the gas-liquid separator 4 is first inserted into the valve chamber 11 at the pressure relief port 10, and then the valve body 2 is directed so that the seal lip 22 faces outward. The support member 3 is inserted into the pressure release port 10 so that the leaf spring 32 faces the outside of the pressure release port 10. In addition, the disk portion 31 may be press-fitted until it presses against the supported portion 23 of the valve body 2.

そして、弁本体２を弁室部１１に挿入する過程では、シールリップ２２が挿入方向と反対方向を向いているので、容易に挿入可能であると共に、このシールリップ２２が縮径方向の変形を受けることによる拡径方向の反力が、円周方向に均等に発生するので、これによって弁本体２が弁室部１１と同心となるように自動調芯される。特に、シールリップ２２の内周に円柱状の被支持部２３の存在によって、芯合わせが容易であるため、安定して挿入することができる。そして、芯合わせされた状態で、支持部材３の円盤部３１に押圧され固定される。   In the process of inserting the valve body 2 into the valve chamber 11, the seal lip 22 faces in the direction opposite to the insertion direction, so that it can be easily inserted and the seal lip 22 is deformed in the reduced diameter direction. Since the reaction force in the diameter-expanding direction due to receiving is evenly generated in the circumferential direction, the valve body 2 is automatically aligned so as to be concentric with the valve chamber portion 11. In particular, since the centering is easy due to the presence of the column-shaped supported portion 23 on the inner periphery of the seal lip 22, it can be stably inserted. And it is pressed and fixed to the disk part 31 of the supporting member 3 in the state aligned center.

図１に示される装着状態において、内部空間Ｓに封入された電解液の反応によって発生するガスの圧力（内圧）は、所定の開弁圧以上になると、圧力開放口１０における分割孔１３及び気液分離体４を介して、圧力開放口１０内における弁室部１１に達し、弁本体２を圧力開放口１０の弁室部１１から外側へ抜け出させる方向へ作用するが、その方向への弁本体２の移動は、支持部材３によって規制される。しかもこの支持部材３は、圧力開放口１０の外側への移動力を受けた場合、板ばね３２が、圧力開放口１０の支持部材装着部１４の内周面１４ａに対する圧接力を増大するので、容易に移動することがなく、したがって、弁本体２を確実に抜け止めすることができる。   In the mounted state shown in FIG. 1, when the pressure (internal pressure) of the gas generated by the reaction of the electrolyte solution enclosed in the internal space S becomes equal to or higher than a predetermined valve-opening pressure, the divided holes 13 and the gas in the pressure release port 10 It reaches the valve chamber 11 in the pressure release port 10 via the liquid separator 4, and acts in a direction to allow the valve body 2 to escape outward from the valve chamber 11 of the pressure release port 10. The movement of the main body 2 is regulated by the support member 3. Moreover, when the support member 3 receives a moving force to the outside of the pressure release port 10, the leaf spring 32 increases the pressure contact force of the pressure release port 10 against the inner peripheral surface 14 a of the support member mounting portion 14. Therefore, the valve body 2 can be reliably prevented from coming off.

また、圧力開放口１０における分割孔１３及び気液分離体４を介して圧力開放口１０内における弁室部１１に達した内圧は、弁本体２のシールリップ２２を内周側へ変位させる開弁力として作用する。したがって、この開弁力が、シールリップ２２の弾性による拡径方向の閉弁力よりも大きくなると、シールリップ２２の先端外周部２２ａが弁室部１１の内周面１１ａから離れて開弁し、前記内圧を、シールリップ２２の外周隙間から支持部材３の各板ばね３２間のスリット部３３を介して、外部の大気中へ開放する。そして、弁本体２は、芯合わせされた状態で支持部材３により固定されているので、弁室部１１の内周面１１ａに対する密接力が全周均一であり、したがって、精度の良い開弁圧を設定することができる。しかも、縮径緊迫力により閉弁力を得るものと異なり、弁室部１１の内周面１１ａに対する密接力の経時低下が小さいので、安定した開弁圧が確保され、したがって、開弁圧を補償するためのバネなどが不要であり、このことも、弁本体２の小径化に寄与することができる。   Further, the internal pressure reaching the valve chamber 11 in the pressure release port 10 through the divided hole 13 and the gas-liquid separator 4 in the pressure release port 10 is an opening that displaces the seal lip 22 of the valve body 2 toward the inner peripheral side. Acts as a valve force. Therefore, when this valve opening force becomes larger than the valve closing force in the diameter expanding direction due to the elasticity of the seal lip 22, the distal end outer peripheral portion 22 a of the seal lip 22 is separated from the inner peripheral surface 11 a of the valve chamber portion 11 and opens. The internal pressure is released from the outer peripheral clearance of the seal lip 22 to the outside atmosphere through the slits 33 between the leaf springs 32 of the support member 3. Since the valve body 2 is fixed by the support member 3 in a centered state, the close contact force with respect to the inner peripheral surface 11a of the valve chamber portion 11 is uniform over the entire circumference. Can be set. In addition, unlike a valve closing force that is obtained by a diameter reducing force, the time-dependent decrease in the contact force with respect to the inner peripheral surface 11a of the valve chamber portion 11 is small, so that a stable valve opening pressure is ensured. A spring for compensation or the like is unnecessary, and this can also contribute to a reduction in the diameter of the valve body 2.

また、この圧力開放動作においては、気液分離体４が、ガスと共に内部空間Ｓの電解液も流出してしまうのを防止する機能を有する。   In this pressure release operation, the gas-liquid separator 4 has a function of preventing the electrolyte solution in the internal space S from flowing out together with the gas.

すなわち、内部空間Ｓに封入された電解液の量が比較的多い場合に、圧力開放に際して、内部空間Ｓの発生ガスが電解液を巻き込んで噴き出したり、横置き（封口板１が横向きとなるような姿勢）に設置したような場合に、圧力開放によって電解液も流出してしまうようなことはない。これは、気液分離体４がガス透過膜からなる場合は、気体透過性と、液体不透過性の機能を併有することによって、発生ガスのみを放出し、電解液の通過は遮断するからである。   That is, when the amount of the electrolytic solution sealed in the internal space S is relatively large, when the pressure is released, the gas generated in the internal space S entrains and blows out the electrolytic solution, or is placed horizontally (the sealing plate 1 is turned sideways). In such a case, the electrolyte does not flow out by releasing the pressure. This is because when the gas-liquid separator 4 is made of a gas permeable membrane, it has both gas permeable and liquid impermeable functions, thereby releasing only the generated gas and blocking the passage of the electrolyte. is there.

また、ゴムの薄膜からなる場合は、発生ガスの噴出力を減衰させ、あるいはゴムの分子間をガスのみが透過し、あるいは圧力差で気液分離体４の外周がめくれることにより生じる隙間が、液体を通過させにくい大きさとなるようにすることによって、電解液の流出を有効に防止し得る。   In the case of a rubber thin film, a gap generated by attenuating the jet power of the generated gas, or allowing only the gas to pass between the rubber molecules, or turning the outer periphery of the gas-liquid separator 4 by a pressure difference, By making the size difficult to allow the liquid to pass through, the outflow of the electrolyte can be effectively prevented.

また、内圧が所定の開弁圧以下になると、弁本体２のシールリップ２２はその弾性による拡径方向の閉弁力によって先端外周部２２ａが弁室部１１の内周面１１ａに密接し、外部からの水蒸気や異物の侵入を遮断する。そして、内圧が所定の開弁圧を超えて上昇した場合にのみシールリップ２２が開弁することから、電解液の蒸発等による減少が最小限に抑えられ、コンデンサ等の寿命を向上させることができる。   Further, when the internal pressure becomes equal to or lower than the predetermined valve opening pressure, the seal lip 22 of the valve body 2 is brought into close contact with the inner peripheral surface 11a of the valve chamber portion 11 by the valve closing force in the diameter increasing direction due to its elasticity, Blocks the entry of water vapor and foreign matter from the outside. Since the seal lip 22 is opened only when the internal pressure rises above a predetermined valve opening pressure, a decrease due to evaporation of the electrolytic solution or the like can be minimized, and the life of the capacitor or the like can be improved. it can.

なお、弁本体２を固定する固定手段としては、図示の形態のような形状による支持部材３には限定されない。   The fixing means for fixing the valve body 2 is not limited to the support member 3 having a shape as shown in the figure.

また、上述した実施の形態においては、設定圧（所定の開弁圧）で確実に開弁させるために、柱状の被支持部２３を支持部材３で固定しているが、弁本体２の基部２１には被支持部２３を突設せずに支持部材３側に支持突起を設け（例えば支持部材３の円盤部３１に、図１における下方へ突出した支持突起を設ける）、これによって弁本体２の基部２１を押圧支持するように構成しても良い。但し、弁本体２及び支持部材３の製作の点からは、上述した実施の形態のように構成することが好ましい。   In the above-described embodiment, the columnar supported portion 23 is fixed by the support member 3 in order to reliably open the valve at the set pressure (predetermined valve opening pressure). 21 is provided with a support projection on the side of the support member 3 without projecting the supported portion 23 (for example, the disc portion 31 of the support member 3 is provided with a support projection protruding downward in FIG. 1), and thereby the valve body You may comprise so that the two base parts 21 may be pressed and supported. However, from the viewpoint of manufacturing the valve body 2 and the support member 3, it is preferable to configure as in the above-described embodiment.

本発明の形態として、電解コンデンサ（キャパシタ）等の封口板に設けられる圧力開放弁を、封口板の厚さ方向に切断して示す断面図である。It is sectional drawing which cut | disconnects and shows the pressure release valve provided in sealing plates, such as an electrolytic capacitor (capacitor), as a form of this invention in the thickness direction of a sealing plate. 図２は、図１におけるII方向の矢視図である。FIG. 2 is a view in the direction of arrow II in FIG. 弁本体の断面斜視図である。It is a cross-sectional perspective view of a valve body. 従来の圧力開放弁の一例を示す断面図である。It is sectional drawing which shows an example of the conventional pressure release valve. 扁平化された電解コンデンサの一例を示すもので、（Ａ）は平面図、（Ｂ）は正面図である。An example of the flattened electrolytic capacitor is shown, (A) is a plan view and (B) is a front view.

符号の説明Explanation of symbols

１ 封口板
１０ 圧力開放口
１１ 弁室部
１２ 着座部
１３ 分割孔
１４ 支持部材装着部
２ 弁本体
２１ 基部
２２ シールリップ
２３ 被支持部
３ 支持部材（固定手段）
３１ 円盤部
３２ 板ばね
３３ スリット部
４ 気液分離体
Ｓ 内部空間（封口板の内側空間） DESCRIPTION OF SYMBOLS 1 Sealing plate 10 Pressure release port 11 Valve chamber part 12 Seating part 13 Dividing hole 14 Support member mounting part 2 Valve main body 21 Base part 22 Seal lip 23 Supported part 3 Support member (fixing means)
31 Disc part 32 Leaf spring 33 Slit part 4 Gas-liquid separator S Internal space (inner space of sealing plate)

Claims (4)

封口板（１）の圧力開放口（１０）内に配置された弁本体（２）と、この弁本体（２）の内周部を固定する固定手段（３）からなり、前記弁本体（２）が、前記圧力開放口（１０）の内周面（１１ａ）に密接され前記封口板（１）の内側空間（Ｓ）における所定の内圧により開弁動作するシールリップ（２２）を有することを特徴とする圧力開放弁。   The valve main body (2) disposed in the pressure release port (10) of the sealing plate (1) and a fixing means (3) for fixing the inner peripheral portion of the valve main body (2). ) Has a seal lip (22) that is in close contact with the inner peripheral surface (11a) of the pressure release port (10) and opens the valve by a predetermined internal pressure in the inner space (S) of the sealing plate (1). Characteristic pressure relief valve. 弁本体（２）の内周部に圧力開放口（１０）の外側を向いて突出した被支持部（２３）が形成され、固定手段（３）が、弁本体（２）の外側で前記圧力開放口（１０）に固定されて前記被支持部（２３）を支持することを特徴とする請求項１に記載の圧力開放弁。   A supported portion (23) protruding toward the outside of the pressure release port (10) is formed on the inner peripheral portion of the valve body (2), and the fixing means (3) is disposed on the outside of the valve body (2). The pressure relief valve according to claim 1, wherein the pressure relief valve is fixed to an opening (10) to support the supported portion (23). 固定手段（３）が、圧力開放口（１０）の内周面（１４ａ）に圧入嵌着される板ばね（３２）を有することを特徴とする請求項１に記載の圧力開放弁。   The pressure relief valve according to claim 1, characterized in that the fixing means (3) has a leaf spring (32) press fitted into the inner peripheral surface (14a) of the pressure relief opening (10). 固定手段（３）が、弁本体（２）の内周の基部（２１）を支持する支持突部を有することを特徴とする請求項１に記載の圧力開放弁。   The pressure relief valve according to claim 1, characterized in that the fixing means (3) has a support projection for supporting the inner base (21) of the valve body (2).
JP2004348278A 2004-12-01 2004-12-01 Pressure release valve Pending JP2006156868A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008098546A (en) * 2006-10-16 2008-04-24 Matsushita Electric Ind Co Ltd Capacitor
JP2008198664A (en) * 2007-02-08 2008-08-28 Optnics Precision Co Ltd Gas penetration safety valve and electrochemical element
WO2009001947A1 (en) * 2007-06-22 2008-12-31 Rubycon Corporation Electronic parts pressure regulating valve, and electronic parts using the valve
EP2075809A1 (en) * 2006-10-16 2009-07-01 Panasonic Corporation Condenser
JP2009266925A (en) * 2008-04-23 2009-11-12 Panasonic Corp Capacitor
JP2010034244A (en) * 2008-07-29 2010-02-12 Nok Corp Pressure relief valve
JP2013080753A (en) * 2011-09-30 2013-05-02 Nippon Chemicon Corp Electrolytic capacitor and method for manufacturing the same
WO2013146803A1 (en) * 2012-03-28 2013-10-03 株式会社オプトニクス精密 Safety valve and electrochemical element
JP2014209526A (en) * 2013-03-22 2014-11-06 日本ケミコン株式会社 Power storage device
WO2015133616A1 (en) * 2014-03-06 2015-09-11 日東電工株式会社 Gas-permeable member and air-permeable container
WO2022230244A1 (en) 2021-04-28 2022-11-03 Nok株式会社 Pressure regulation valve

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Publication number Priority date Publication date Assignee Title
JPS646035U (en) * 1987-06-30 1989-01-13
JPS6439627U (en) * 1987-09-01 1989-03-09

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS646035U (en) * 1987-06-30 1989-01-13
JPS6439627U (en) * 1987-09-01 1989-03-09

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2075809A4 (en) * 2006-10-16 2014-09-17 Panasonic Corp Condenser
EP2075809A1 (en) * 2006-10-16 2009-07-01 Panasonic Corporation Condenser
JP2008098546A (en) * 2006-10-16 2008-04-24 Matsushita Electric Ind Co Ltd Capacitor
JP2008198664A (en) * 2007-02-08 2008-08-28 Optnics Precision Co Ltd Gas penetration safety valve and electrochemical element
WO2009001947A1 (en) * 2007-06-22 2008-12-31 Rubycon Corporation Electronic parts pressure regulating valve, and electronic parts using the valve
JPWO2009001947A1 (en) * 2007-06-22 2010-08-26 ルビコン株式会社 Pressure regulating valve for electronic parts and electronic parts using the same
JP5489714B2 (en) * 2007-06-22 2014-05-14 ルビコン株式会社 Pressure regulating valve for electronic parts and electronic parts using the same
JP2009266925A (en) * 2008-04-23 2009-11-12 Panasonic Corp Capacitor
JP2010034244A (en) * 2008-07-29 2010-02-12 Nok Corp Pressure relief valve
JP2013080753A (en) * 2011-09-30 2013-05-02 Nippon Chemicon Corp Electrolytic capacitor and method for manufacturing the same
WO2013146803A1 (en) * 2012-03-28 2013-10-03 株式会社オプトニクス精密 Safety valve and electrochemical element
JPWO2013146803A1 (en) * 2012-03-28 2015-12-14 株式会社オプトニクス精密 Safety valves and electrochemical elements
JP2014209526A (en) * 2013-03-22 2014-11-06 日本ケミコン株式会社 Power storage device
WO2015133616A1 (en) * 2014-03-06 2015-09-11 日東電工株式会社 Gas-permeable member and air-permeable container
JP2015181153A (en) * 2014-03-06 2015-10-15 日東電工株式会社 Gas permeable member and air permeable container
WO2022230244A1 (en) 2021-04-28 2022-11-03 Nok株式会社 Pressure regulation valve

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