JP2007059495A - One-way valve - Google Patents

One-way valve Download PDF

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JP2007059495A
JP2007059495A JP2005240573A JP2005240573A JP2007059495A JP 2007059495 A JP2007059495 A JP 2007059495A JP 2005240573 A JP2005240573 A JP 2005240573A JP 2005240573 A JP2005240573 A JP 2005240573A JP 2007059495 A JP2007059495 A JP 2007059495A
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way valve
opening
elastic body
peripheral surface
pressure
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Hiroyuki Nikamoto
博之 二家本
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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
    • Y02E60/13—Energy storage using capacitors

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Abstract

<P>PROBLEM TO BE SOLVED: To provide, when a pressure container such as a condenser or a capacitor is miniaturized and so it is necessary to make an opening provided in a sealing plate a small diameter, a one-way valve with a small outer diameter capable of being mounted on the sealing plate. <P>SOLUTION: The one-way valve 1 comprises an elastic body 4 mounted on the opening 31 provided in the sealing plate 3 of the pressure container 2, and including a fixing part 47 making close contact with the internal peripheral surface 33 of the opening 31, and a release 46 that releases pressure from a contact surface 45 with the internal peripheral surface 33 when pressure in the pressure container 2 exceeds a predetermined value; and a core metal 5 where a cylinder 52 provided on an inner diameter side of the elastic body 4 has a missing part 51 in a peripheral direction thereof. In the valve, the cylinder 52 of the core metal 5 holds the elastic body 4 by permitting the fixing part 47 to fit to the internal peripheral surface 33 of the opening 31. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、コンデンサまたはキャパシタ等の圧力容器の封口板に装着され、圧力容器内の封止圧力が所定の開弁圧を上回ったときに開弁して圧力を開放する一方向弁に関するものである。   The present invention relates to a one-way valve which is attached to a sealing plate of a pressure vessel such as a capacitor or a capacitor and opens when the sealing pressure in the pressure vessel exceeds a predetermined valve opening pressure to release the pressure. 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、ジュール発熱や内部発生ガス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虞がある。このため、従来から、圧力容器の底部に切り込みを入れて破裂板としたり、また、蓋にゴム製のキャップを取り付け安全弁とすること等により圧力容器の破裂防止を図ったり、あるいは、封口板に例えばＰＴＦＥ等からなる多孔質膜に撥水処理を施すことによって、気体は透過するが液体は不透過として容器の内圧を外部に開放する役割をもつブリーザを取り付けて、容器内部に発生するガスの圧力を開放できるようにしたもの等が開発されている。   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 via a gasket. If such a completely sealed structure is used, when an abrupt load is applied, the internal pressure of the container is increased by Joule heat generation or internally generated gas, and there is a possibility that the function of the capacitor or the life of the capacitor may be decreased. For this reason, conventionally, the bottom of the pressure vessel has been cut into a rupture plate, or the pressure vessel has been prevented from rupture by attaching a rubber cap to the lid as a safety valve, or the sealing plate has For example, by applying a water repellent treatment to a porous membrane made of PTFE or the like, a gas is permeated but a liquid is impermeable, and a breather that serves to release the internal pressure of the container to the outside is attached, and the gas generated inside the container The one that can release the pressure has been developed.

しかしながら、上記従来技術のように封口板に破裂板や安全弁を用いる場合には、容器が一度破裂してしまうと、それ以後は使用できず、よって繰り返しての使用ができない。   However, when a rupture disk or a safety valve is used as the sealing plate as in the above prior art, once the container is ruptured, it cannot be used thereafter, and therefore cannot be used repeatedly.

また、封口板に設けられたブリーザは、圧力容器の内圧を一定に保ち、電解液等の内封液の漏洩を防止するといった機能を有するが、通常の使用状態で発生する熱および内圧でも、容器内のガスがブリーザから僅かに放出されるため、電解液が蒸発によって減少しやすく、外部からの水蒸気の侵入も起こりやすい。また、劣悪な環境下では、ブリーザの多孔質膜が目詰まりを起こすこともあり、安定した性能を期待することが困難であった。また、ブリーザは急激な内圧上昇には対応できないため、ブリーザとは別に、内圧が所定値以上となった時にこの内圧を瞬時に開放して容器の爆発を防止するための防爆弁を設ける必要があった。   In addition, the breather provided on the sealing plate has a function of keeping the internal pressure of the pressure vessel constant and preventing leakage of the encapsulated liquid such as an electrolyte, but even with heat and internal pressure generated in a normal use state, Since the gas in the container is slightly released from the breather, the electrolytic solution is likely to be reduced by evaporation, and water vapor from outside tends to enter. Further, in a poor environment, the breather porous membrane may be clogged, making it difficult to expect stable performance. Also, since the breather cannot cope with a sudden rise in internal pressure, it is necessary to provide an explosion-proof valve to release the internal pressure instantaneously and prevent the container from exploding when the internal pressure exceeds a predetermined value. there were.

図８に、従来用いられているオイルシールタイプの防爆弁である一方向弁を示す。この一方向弁１０１は、封口板１０２に設けられた開口部１０３と、その開口部１０３の内部に設けた軸部１０４とにより形成された弁取付空間１０５に、内径側に設けられた芯金１０６により固定部１０７が開口部１０３の内周面に嵌合し、シールリップ１０８が軸部１０４の外周面に密接するように装着されており、これにより内圧が所定値以上となった時にこの内圧がシールリップ１０８と軸部１０４の外周面の間から開放され容器の爆発が防止されている（下記特許文献１参照）。   FIG. 8 shows a one-way valve that is an oil seal type explosion-proof valve conventionally used. This one-way valve 101 is a cored bar provided on the inner diameter side in a valve mounting space 105 formed by an opening 103 provided in a sealing plate 102 and a shaft 104 provided in the opening 103. 106, the fixed portion 107 is fitted to the inner peripheral surface of the opening 103, and the seal lip 108 is attached so as to be in close contact with the outer peripheral surface of the shaft portion 104. The internal pressure is released from between the seal lip 108 and the outer peripheral surface of the shaft portion 104 to prevent explosion of the container (see Patent Document 1 below).

しかしながら、この図８に示す内径シールタイプの一方向弁１０１は、外径側で芯金１０６により固定部１０７が内周面に嵌合し、内径側でシールリップ１０８が軸部１０４に接触してシールする構造であるため、一方向弁１０１を装着させるためには固定部１０７を嵌合させるための開口部１０３とその内部に軸部１０４を設ける必要があり、開口部１０３の内径が大きくなると共に一方向弁１０１も外径が大きくなり、機器の小型化に対応するのが難しかった。   However, in the inner diameter seal type one-way valve 101 shown in FIG. 8, the fixed portion 107 is fitted to the inner peripheral surface by the cored bar 106 on the outer diameter side, and the seal lip 108 contacts the shaft portion 104 on the inner diameter side. Therefore, in order to mount the one-way valve 101, it is necessary to provide the opening 103 for fitting the fixing portion 107 and the shaft portion 104 therein, and the inner diameter of the opening 103 is large. At the same time, the one-way valve 101 has an increased outer diameter, and it has been difficult to cope with downsizing of the device.

国際公開第ＷＯ０３／０４４３９７Ａ１号パンフレットInternational Publication No. WO03 / 044397A1 Pamphlet

本発明は以上の問題点を解決するためになされたものであって、その目的とするところは、コンデンサまたはキャパシタ等の圧力容器が小型化され、封口板に設ける開口部を小径化する必要が生じたときに、それに装着可能な外径が小さい一方向弁を提供することを目的とする。   The present invention has been made to solve the above-described problems, and the object of the present invention is to reduce the size of a pressure vessel such as a capacitor or a capacitor and to reduce the diameter of an opening provided in a sealing plate. It is an object to provide a one-way valve with a small outer diameter that can be fitted to it when it occurs.

上記目的を達成するため、本発明の請求項１による一方向弁は、圧力容器の封口板に設けられた開口部に装着され、円筒部が周方向に欠落部を有する有底円筒状の芯金の円筒部により該開口部の内周面に密接に嵌合する固定部と、前記圧力容器内の圧力が所定値を上回ったときに前記内周面との接触面から前記圧力を開放する開放部とが周方向に形成されている円筒状の弾性体を有することを特徴とするものである。   To achieve the above object, a one-way valve according to claim 1 of the present invention is attached to an opening provided in a sealing plate of a pressure vessel, and a cylindrical part having a bottomed cylindrical core having a missing part in the circumferential direction. The pressure is released from the contact surface between the fixed portion closely fitted to the inner peripheral surface of the opening by the gold cylindrical portion and the inner peripheral surface when the pressure in the pressure vessel exceeds a predetermined value. The open portion has a cylindrical elastic body formed in the circumferential direction.

また、本発明の請求項２による一方向弁は、上記した請求項１の一方向弁において、前記芯金の円筒部の欠落部に咬合したバネにより前記開放部が前記内周面に押圧されていることを特徴とするものである。   The one-way valve according to the second aspect of the present invention is the one-way valve according to the first aspect, wherein the open portion is pressed against the inner peripheral surface by a spring engaged with a missing portion of the cylindrical portion of the cored bar. It is characterized by that.

また、本発明の請求項３による一方向弁は、上記した請求項１若しくは２のいずれかに記載の一方向弁において、前記弾性体の容器内部側の内径部に邪魔板を設けたことを特徴とするものである。   The one-way valve according to claim 3 of the present invention is the one-way valve according to claim 1 or 2, wherein a baffle plate is provided on an inner diameter portion of the elastic body on the container inner side. It is a feature.

また、本発明の請求項４による一方向弁は、上記した請求項１乃至３のいずれかに記載の一方向弁において、前記開放部がシールリップ形状であることを特徴とするものである。   A one-way valve according to a fourth aspect of the present invention is the one-way valve according to any one of the first to third aspects, wherein the opening portion has a seal lip shape.

本発明は、以下の効果を奏する。   The present invention has the following effects.

すなわち、上記構成を備えた本発明の請求項１に係る一方向弁においては、固定部と開放部とが周方向に形成されている円筒状の弾性体が開口部の内周面に接する構造であるので、開口部の内径側に設ける軸部を除去することが可能となり、開口部を小径化することができる。すなわち、開口部が小径化された場合に、円筒部が周方向に欠落部を有する芯金により弾性体の固定部が開口部の内周面に嵌合して弾性体を拘持すると共に、圧力容器内の圧力が所定値を上回ったときに圧力を開放する開放部の接触面が、開口部の内周面と接触している構造であるので、一方向弁の外径を小径化することができ、小径化された開口部に装着させることが可能となる。   That is, in the one-way valve according to claim 1 of the present invention having the above-described configuration, a structure in which the cylindrical elastic body in which the fixing portion and the opening portion are formed in the circumferential direction is in contact with the inner peripheral surface of the opening portion. Therefore, the shaft portion provided on the inner diameter side of the opening can be removed, and the diameter of the opening can be reduced. That is, when the diameter of the opening is reduced, the cylindrical part is fitted with the inner peripheral surface of the opening by the core metal having a missing part in the circumferential direction, and holds the elastic body. Since the contact surface of the opening that releases the pressure when the pressure in the pressure vessel exceeds a predetermined value is in contact with the inner peripheral surface of the opening, the outer diameter of the one-way valve is reduced. And can be attached to the opening having a reduced diameter.

またこれに加えて、請求項２に係る一方向弁においては、開放部からガスと共に微小の電解液等の内封液が漏洩するのをより一層防止することができ、また、請求項３に係る一方向弁においては、内径部からガスと共に微小の電解液等の内封液が漏洩するのを防止することができる。更に、請求項４に係る一方向弁においては、開放部がシールリップ形状をしているので、圧力容器内が所定圧力以上になったとき開放部をより一層開放し易くすることができる。   In addition to this, in the one-way valve according to claim 2, it is possible to further prevent leakage of the encapsulated liquid such as a minute electrolyte together with the gas from the open portion. In such a one-way valve, it is possible to prevent leakage of the encapsulated liquid such as a minute electrolyte along with the gas from the inner diameter portion. Further, in the one-way valve according to claim 4, since the opening portion has a seal lip shape, the opening portion can be more easily opened when the pressure vessel becomes a predetermined pressure or higher.

つぎに本発明の実施例を図面にしたがって説明する。   Next, embodiments of the present invention will be described with reference to the drawings.

図１は、本発明の実施例に係る一方向弁（圧力開放弁とも称する）を有する圧力容器である密閉型電池またはコンデンサ（以下、単にコンデンサと称する）であって、（Ａ）は縦断面図、（Ｂ）は平面図である。図２は、一方向弁を装着するための開口部であって、図１（Ｂ）のＸ−Ｘ方向縦断面図である。図３は、一方向弁単体で、（Ａ）は平面図、（Ｂ）は（Ａ）のＹ−Ｚ方向縦断面図、（Ｃ）は底面図である。図４は、一方向弁を構成する芯金であって、（Ａ）は平面図、（Ｂ）は正面図である。図５は、芯金に付設しているバネであって、（Ａ）は平面図、（Ｂ）は正面図である。図６は、図３の一方向弁単体を図２の開口部に装着させた状態を示す断面図である。   FIG. 1 is a sealed battery or capacitor (hereinafter simply referred to as a capacitor) which is a pressure vessel having a one-way valve (also referred to as a pressure release valve) according to an embodiment of the present invention, and (A) is a longitudinal section. FIG. 4B is a plan view. FIG. 2 is an opening for mounting the one-way valve, and is a vertical cross-sectional view in the XX direction of FIG. 3A and 3B show a single one-way valve, in which FIG. 3A is a plan view, FIG. 3B is a vertical cross-sectional view in the YZ direction of FIG. FIGS. 4A and 4B are core bars constituting a one-way valve, where FIG. 4A is a plan view and FIG. 4B is a front view. 5A and 5B are springs attached to the metal core, wherein FIG. 5A is a plan view and FIG. 5B is a front view. 6 is a cross-sectional view showing a state in which the single one-way valve shown in FIG. 3 is attached to the opening shown in FIG.

図１に示すコンデンサ２は、以下のように構成されている。   The capacitor 2 shown in FIG. 1 is configured as follows.

すなわち先ず、アルミニウム等の金属材料よりなる圧力容器としての有底円筒状のケース２１が設けられており、このケース２１の内部に本体素子２２が収容されており、ケース２１の上端開口部が、電気絶縁性を備えたフェノール樹脂等の高分子材料よりなる円板状の封口板３によって閉塞されている。本体素子２２には、ケース２１の内部に封入された電解液が含浸されている。また、ケース２１の外周は外缶２３によって覆われている。   That is, first, a bottomed cylindrical case 21 is provided as a pressure vessel made of a metal material such as aluminum. A main body element 22 is accommodated inside the case 21, and an upper end opening of the case 21 is It is closed by a disc-shaped sealing plate 3 made of a polymer material such as phenol resin having electrical insulation. The main body element 22 is impregnated with an electrolytic solution enclosed in the case 21. The outer periphery of the case 21 is covered with an outer can 23.

上記封口板３は、その外周部が、ケース２１の上端部を内側へ折り返すように形成されたカシメ部２１ａと、その下側に位置してケース２１に円周方向に連続して形成された絞り部２１ｂとの間に、ゴム状弾性材料よりなる環状のガスケット２４を介して気密的に固定されている。また、この封口板３には、本体素子２２にそれぞれリード線２５を介して接続された一対の電極端子２６が厚さ方向に貫通して設けられるとともに、一方向弁１が設けられている。電極端子２６はそれぞれその一部がインサート成形によって封口板３に埋設された状態で一体化されており、またその外周面に形成された環状の鍔部２６ａによって封口板３に対して抜け止めされている。   The sealing plate 3 has an outer peripheral portion continuously formed in the circumferential direction in the case 21 located on the lower side of the crimping portion 21a formed so that the upper end portion of the case 21 is folded inward. Between the throttle part 21b, it is airtightly fixed via an annular gasket 24 made of a rubber-like elastic material. In addition, the sealing plate 3 is provided with a pair of electrode terminals 26 that are respectively connected to the main body element 22 via lead wires 25 in the thickness direction, and is provided with the one-way valve 1. Each of the electrode terminals 26 is integrated in a state where a part thereof is embedded in the sealing plate 3 by insert molding, and is prevented from being detached from the sealing plate 3 by an annular flange 26a formed on the outer peripheral surface thereof. ing.

上記封口板３は、高分子材料によってプレート状に成形された、例えば円板状、楕円状あるいは略方形に成形されており、この封口板３に、アルミニウム等よりなる電極端子２６が厚さ方向に貫通するように埋設されており、この電極端子２６の容器外側端面に、ＳＰＣＣ、ニッケル、ステンレス等の金属板よりなる外部端子（図示せず）が取り付けられる。   The sealing plate 3 is formed into a plate shape by a polymer material, for example, a disc shape, an elliptical shape or a substantially rectangular shape, and an electrode terminal 26 made of aluminum or the like is formed on the sealing plate 3 in the thickness direction. An external terminal (not shown) made of a metal plate such as SPCC, nickel, or stainless steel is attached to the container outer end surface of the electrode terminal 26.

高分子材料からなる封口板３の成形材質としては、樹脂材料、エラストマ（ゴム、熱可塑性エラストマ、樹脂材料とゴムの混合物またはブロック共重合体またはグラフト共重合体等の弾性体）、樹脂材料とエラストマの積層板材料等が用いられる。   The molding material of the sealing plate 3 made of a polymer material includes a resin material, an elastomer (rubber, thermoplastic elastomer, a mixture of a resin material and a rubber, or an elastic body such as a block copolymer or a graft copolymer), a resin material, An elastomer laminate material or the like is used.

上記高分子材料は、要求される耐熱性に応じて適宜選択される。当該実施例では、耐熱性およびコストの面で熱硬化性樹脂の一つであるフェノール樹脂を用いた例を示す。   The polymer material is appropriately selected according to required heat resistance. In this example, an example using a phenol resin which is one of thermosetting resins in terms of heat resistance and cost is shown.

本実施例では、封口板３と電極端子２６はインサート成形により一体化されているが、これに限らず、封口板３と電極端子２６とが別体で構成され、封口板３の成形後に電極端子２６を一体化するタイプの封口板であっても良い。   In the present embodiment, the sealing plate 3 and the electrode terminal 26 are integrated by insert molding. However, the present invention is not limited to this, and the sealing plate 3 and the electrode terminal 26 are configured separately, and the electrode is formed after the sealing plate 3 is formed. A sealing plate of a type in which the terminal 26 is integrated may be used.

また、封口板３には、図２に示すように、一方向弁１を装着するための開口部３１が厚さ方向に貫通するように円筒形状に設けられている。開口部３１は、容器内部側Ａで縮径し段差３２が形成された内周面３３を有している。その内周面３３のうちの大径内周面３３ａの容器外部側Ｂ近くには後述する弾性体４を抜け止めするための段差状の係合部３４が設けられ、段差３２には弾性体４の容器内部側Ａの端面４３ａが当接するようになっている。   Further, as shown in FIG. 2, the sealing plate 3 is provided with a cylindrical shape so that an opening 31 for mounting the one-way valve 1 penetrates in the thickness direction. The opening 31 has an inner peripheral surface 33 that is reduced in diameter on the container inner side A and formed with a step 32. A step-shaped engaging portion 34 for preventing the elastic body 4 to be described later from coming off is provided near the container outer side B of the large-diameter inner peripheral surface 33a of the inner peripheral surface 33, and the step 32 has an elastic body. 4, the end surface 43a on the container inner side A comes into contact.

一方向弁１は、弾性体４と、芯金５と、バネ６と、邪魔板７とを備えている。なお、バネ６と邪魔板７は本実施例においては用いられているが、要求特性によっては用いられないこともある。   The one-way valve 1 includes an elastic body 4, a core metal 5, a spring 6, and a baffle plate 7. Although the spring 6 and the baffle plate 7 are used in this embodiment, they may not be used depending on required characteristics.

弾性体４は、図３に示す通り、ゴム状弾性体により成形された容器内部側Ａが縮径している筒状体であって、大径部４１の外周面には凸部４２が全周に亙って形成されていて、前述した開口部３１の大径内周面３３ａに設けられている係合部３４と係合し、弾性体４がコンデンサ２内の圧力により容器外部側Ｂに抜け出るのを防止するようになっている。なお、コンデンサ２内の圧力が急激に上昇したときには、一方向弁１が抜け出て一方向弁１の破裂を防止する機能も有するようになっている。また、小径部４３の容器内部側Ａの端面４３ａには、容器内部側Ａと容器外部側Ｂとを連通するための連通部４４が周方向に一定の幅で設けられていて、弾性体４が開口部３１に装着されたとき、連通部４４を有する弾性体４の周方向部４４Ａが、コンデンサ２内の圧力が所定値を上回ったときに内周面３３との接触面４５から圧力が開放される開放部４６となり、連通路４４を有しない弾性体４の周方向部４４Ｂが後述する芯金５により開口部３１の内周面３３に密接に嵌合し弾性体４を拘持する固定部４７となる。また、容器内部側Ａの小径部４３の内径部４８には、ガスは透過させるがケース２１内の電解液が漏洩するのを防止する例えば不織布からなる邪魔板７が設けられている。なお、邪魔板に使用される材料としては、不織布の他にＰＴＦＥ等からなる多孔質膜に撥水処理を施したガスは透過するが電解液を透過させないものであればどのような材料であっても良い。   As shown in FIG. 3, the elastic body 4 is a cylindrical body formed by a rubber-like elastic body and having a reduced diameter on the container inner side A. The convex portion 42 is entirely formed on the outer peripheral surface of the large-diameter portion 41. It is formed over the circumference, and engages with the engaging portion 34 provided on the large-diameter inner peripheral surface 33a of the opening 31 described above. It is designed to prevent it from falling out. In addition, when the pressure in the capacitor | condenser 2 rises rapidly, the one-way valve 1 comes out and has a function which prevents the one-way valve 1 from bursting. The end surface 43a of the small-diameter portion 43 on the container inner side A is provided with a communication portion 44 having a constant width in the circumferential direction for communicating the container inner side A and the container outer side B. Is attached to the opening 31, the circumferential portion 44 </ b> A of the elastic body 4 having the communication portion 44 receives pressure from the contact surface 45 with the inner peripheral surface 33 when the pressure in the capacitor 2 exceeds a predetermined value. The circumferential portion 44B of the elastic body 4 that does not have the communication passage 44 is closely fitted to the inner peripheral surface 33 of the opening 31 by the cored bar 5 described later to hold the elastic body 4. It becomes the fixing part 47. Further, the inner diameter portion 48 of the small diameter portion 43 on the inner side A of the container is provided with a baffle plate 7 made of, for example, a nonwoven fabric that allows gas to permeate but prevents leakage of the electrolyte in the case 21. As the material used for the baffle plate, any material can be used as long as it allows the porous film made of PTFE or the like to pass through the water-repellent treatment gas but does not allow the electrolyte solution to pass therethrough. May be.

芯金５は、図４に示す通り、板金等で成形されたものであって、周方向に欠落部５１を有する円筒部５２と底部５３からなる有底円筒形状であって、円筒部５２の周方向長さは上述の弾性体４の連通路４４を有しない周方向部４４Ｂの周方向長さに対応した周方向長さになっている。なお、本実施例では、円筒部５２は２箇所であるが、欠落部５１が形成されていれば個数が限定されるものではなく１箇所であっても良く、また３箇所以上であっても良い。   As shown in FIG. 4, the core metal 5 is formed of sheet metal or the like, and has a bottomed cylindrical shape including a cylindrical portion 52 having a missing portion 51 in the circumferential direction and a bottom portion 53. The circumferential length is a circumferential length corresponding to the circumferential length of the circumferential portion 44B that does not have the communication path 44 of the elastic body 4 described above. In this embodiment, the number of the cylindrical portions 52 is two, but the number is not limited as long as the missing portions 51 are formed, and may be one, or may be three or more. good.

バネ６は、図５に示す通り、鋼等で成形されたものであって、周方向に欠落部６１を有する円筒部６２と底部６３からなる有底円筒形状であって、円筒部６２の周方向長さは上述の弾性体４の連通路４４を有する周方向部４４Ａの周方向長さに対応した周方向長さになっている。したがって、バネ６の底部６３が芯金５の底部５３に当接するように芯金５の内径側にバネ６を付設したときに、円筒部６２が芯金５の欠落部５１の位置に、欠落部６１の位置が芯金５の円筒部５２に咬合するように構成されている。なお、芯金５とバネ６とは別個に成形して開口部３１に別々に装着しても良いが、別個に成形したのを例えば熔接等により事前に結合させた状態で開口部３１に装着しても良い。更に、芯金５とバネ６とを同一部品により一体で成形し装着してもよい。   As shown in FIG. 5, the spring 6 is formed of steel or the like and has a bottomed cylindrical shape including a cylindrical portion 62 having a missing portion 61 and a bottom portion 63 in the circumferential direction. The length in the direction is the circumferential length corresponding to the circumferential length of the circumferential portion 44 </ b> A having the communication path 44 of the elastic body 4. Therefore, when the spring 6 is attached to the inner diameter side of the core bar 5 so that the bottom part 63 of the spring 6 contacts the bottom part 53 of the core bar 5, the cylindrical part 62 is missing at the position of the missing part 51 of the core bar 5. The position of the part 61 is configured to be engaged with the cylindrical part 52 of the cored bar 5. The cored bar 5 and the spring 6 may be molded separately and attached to the opening 31 separately. However, the separately molded parts are attached to the opening 31 in a state of being joined in advance by welding or the like. You may do it. Furthermore, the cored bar 5 and the spring 6 may be integrally molded and mounted using the same component.

上記一方向弁１を開口部３１に装着するには、開口部３１の容器外部側Ｂから弾性体４の小径部４３を先頭に連通部４４が形成されていない周方向部４４Ｂの端面４３ａが開口部３１の段差３２に当接するように挿入した後に、邪魔板７を弾性体４の容器内部側Ａの小径部４３の内径部４８に係合させる。この場合に、邪魔板７を内径部４８に係合させてから弾性体４を開口部３１に挿入してもよい。続いて、弾性体４の内径側に容器外部側Ｂから底部５３を先頭に芯金５を挿入する。この場合に弾性体４の連通路４４を有しない周方向部４４Ｂの位置に芯金５の円筒部５２が嵌合するように挿入し固定部４７を形成する。次いで、芯金５の内径側に容器外部側Ｂからバネ６の底部６３を先頭に、円筒部６２が芯金５の欠落部５１に咬合するように付設する。この場合に、バネ６の円筒部６２が弾性体４の連通路４４を有する周方向部４４Ａを内径側から内周面３３に押圧し開放部４６を形成する。   In order to attach the one-way valve 1 to the opening 31, the end face 43 a of the circumferential portion 44 </ b> B in which the communication portion 44 is not formed from the outer side B of the opening 31 to the small diameter portion 43 of the elastic body 4 is formed. After the baffle plate 7 is inserted so as to contact the step 32 of the opening 31, the baffle plate 7 is engaged with the inner diameter portion 48 of the small diameter portion 43 on the container inner side A of the elastic body 4. In this case, the elastic body 4 may be inserted into the opening 31 after the baffle plate 7 is engaged with the inner diameter portion 48. Subsequently, the cored bar 5 is inserted into the inner diameter side of the elastic body 4 from the container outer side B with the bottom 53 as the head. In this case, the fixing part 47 is formed by inserting the cylindrical part 52 of the cored bar 5 into the position of the circumferential part 44 </ b> B that does not have the communication path 44 of the elastic body 4. Subsequently, the bottom 63 of the spring 6 is attached to the inner diameter side of the core bar 5 from the outer side B of the container so that the cylindrical part 62 is engaged with the missing part 51 of the core bar 5. In this case, the cylindrical portion 62 of the spring 6 presses the circumferential direction portion 44 </ b> A having the communication path 44 of the elastic body 4 from the inner diameter side to the inner circumferential surface 33 to form the opening portion 46.

したがって、弾性体４に形成されている固定部４７が芯金５の円筒部５２により開口部３１の内周面３３に密接に嵌合し一方向弁１を開口部３１に拘持すると共に、開放部４６も接触面４５で内周面３３に接触しているので一方向弁の外径を小さくすることが可能となる。更に、通常の使用状態では内圧が設定された開放圧以下となっているので、開放部４６の接触面４５が内周面３３に接触した状態となり、接触面４５からコンデンサ２内の電解液が漏洩するのを防止し、また、コンデンサ２内の圧力が所定値を上回ったときには開放部４６が開放し、この圧力を開放するのでコンデンサ２の破壊を防止することが可能となる。バネ６が用いられた場合には、開放部４６が内周面３３に押圧されるので、弾性体４が経時変化により老化したとき等に有効である。また、弾性体４の内径部４８に不織布からなる邪魔板７が設けられていると、常時コンデンサ２内から発生するガスと共に流出しようとする微量の電解液の漏洩を防止することが可能となる。   Therefore, the fixing portion 47 formed on the elastic body 4 is closely fitted to the inner peripheral surface 33 of the opening 31 by the cylindrical portion 52 of the core metal 5 to hold the one-way valve 1 to the opening 31, Since the opening 46 is also in contact with the inner peripheral surface 33 at the contact surface 45, the outer diameter of the one-way valve can be reduced. Furthermore, since the internal pressure is equal to or lower than the set open pressure in a normal use state, the contact surface 45 of the open portion 46 comes into contact with the inner peripheral surface 33, and the electrolyte in the capacitor 2 is discharged from the contact surface 45. Leakage is prevented, and when the pressure in the capacitor 2 exceeds a predetermined value, the opening 46 is opened, and this pressure is released, so that the capacitor 2 can be prevented from being broken. When the spring 6 is used, the opening 46 is pressed against the inner peripheral surface 33, which is effective when the elastic body 4 is aged due to changes over time. In addition, when the baffle plate 7 made of a nonwoven fabric is provided on the inner diameter portion 48 of the elastic body 4, it is possible to prevent a small amount of electrolyte from leaking along with the gas generated from the capacitor 2 at all times. .

なお、弾性体４の形状は、上述の実施例では開放部４６と固定部４７が共に円筒形状であるが、図７に示す通り、開放部４６の形状をコンデンサ２内の圧力が所定以上になったときに開放しやすいシールリップ形状としても良い。   The elastic body 4 has a cylindrical shape in which both the open portion 46 and the fixed portion 47 are cylindrical in the above-described embodiment. However, as shown in FIG. It is good also as a seal lip shape which is easy to open when it becomes.

（Ａ）は本発明に係る一方向圧力開放弁を有するコンデンサの断面図、（Ｂ）は同コンデンサの平面図(A) is sectional drawing of the capacitor | condenser which has a one-way pressure release valve based on this invention, (B) is a top view of the capacitor | condenser 本発明に係る一方向弁を装着する開口部の断面図Sectional drawing of the opening part which mounts the one-way valve concerning this invention （Ａ）は本発明に係る一方向弁の平面図、（Ｂ）は同一方向弁の断面図、（Ｃ）は同一方向弁の底面図(A) is a plan view of a one-way valve according to the present invention, (B) is a sectional view of the same direction valve, and (C) is a bottom view of the same direction valve. （Ａ）は本発明に係る芯金の平面図、（Ｂ）は同芯金の正面図(A) is a top view of the metal core which concerns on this invention, (B) is a front view of a metal core. （Ａ）は本発明に係るバネの平面図、（Ｂ）は同バネの正面図(A) is a top view of the spring which concerns on this invention, (B) is a front view of the spring 一方向弁の装着状体を示す断面図Sectional view showing a one-way valve fitting 本発明の別の実施例に係る一方向弁の断面図Sectional drawing of the one-way valve which concerns on another Example of this invention. 従来技術に係る圧力開放弁の断面図Sectional view of a pressure relief valve according to the prior art

符号の説明Explanation of symbols

１ 一方向弁
２ コンデンサ（圧力容器）
３ 封口板
３１ 開口部
３２ 段差
３３ 内周面
３４ 係合部
４ 弾性体
４１ 大径部
４２ 凸部
４３ 小径部
４４ 連通部
４４Ａ，４４Ｂ 周方向部
４５ 接触面
４６ 開放部
４７ 固定部
４８ 内径部
４９
５ 芯金
５１，６１ 欠落部
５２，６２ 円筒部
５３，６３ 底部
６ バネ
７ 邪魔板
Ａ 容器内部
Ｂ 容器外部 1 One-way valve 2 Capacitor (pressure vessel)
3 Sealing plate 31 Opening portion 32 Step 33 Inner circumferential surface 34 Engaging portion 4 Elastic body 41 Large diameter portion 42 Convex portion 43 Small diameter portion 44 Communication portion 44A, 44B Circumferential portion 45 Contact surface 46 Opening portion 47 Fixing portion 48 Inner diameter portion 49
5 Core metal 51, 61 Missing part 52, 62 Cylindrical part 53, 63 Bottom part 6 Spring 7 Baffle plate A Container inside B Container outside

Claims (4)

圧力容器の封口板に設けられた開口部に装着され、円筒部が周方向に欠落部を有する有底円筒状の芯金の円筒部により該開口部の内周面に密接に嵌合する固定部と、前記圧力容器内の圧力が所定値を上回ったときに前記内周面との接触面から前記圧力を開放する開放部とが周方向に形成されている円筒状の弾性体を有することを特徴とする一方向弁。   Fixing that is fitted in the opening provided on the sealing plate of the pressure vessel, and the cylindrical portion is closely fitted to the inner peripheral surface of the opening by a cylindrical portion of a bottomed cylindrical cored bar having a missing portion in the circumferential direction. And a cylindrical elastic body in which an opening portion that releases the pressure from the contact surface with the inner peripheral surface when the pressure in the pressure vessel exceeds a predetermined value is formed in the circumferential direction. One-way valve characterized by 請求項１の一方向弁において、
前記芯金の円筒部の欠落部に咬合したバネにより前記開放部が前記内周面に押圧されていることを特徴とする一方向弁。 The one-way valve of claim 1,
The one-way valve, wherein the open portion is pressed against the inner peripheral surface by a spring engaged with a missing portion of the cylindrical portion of the cored bar. 請求項１若しくは２のいずれかに記載の一方向弁において、
前記弾性体の容器内部側の内径部に邪魔板を設けたことを特徴とする一方向弁。 The one-way valve according to claim 1 or 2,
A one-way valve characterized in that a baffle plate is provided on an inner diameter portion of the elastic body inside the container. 請求項１乃至３のいずれかに記載の一方向弁において、
前記開放部がシールリップ形状であることを特徴とする一方向弁。 The one-way valve according to any one of claims 1 to 3,
The one-way valve characterized in that the opening portion has a seal lip shape.
JP2005240573A 2005-08-23 2005-08-23 One-way valve Withdrawn JP2007059495A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005240573A JP2007059495A (en) 2005-08-23 2005-08-23 One-way valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005240573A JP2007059495A (en) 2005-08-23 2005-08-23 One-way valve

Publications (1)

Publication Number Publication Date
JP2007059495A true JP2007059495A (en) 2007-03-08

Family

ID=37922743

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005240573A Withdrawn JP2007059495A (en) 2005-08-23 2005-08-23 One-way valve

Country Status (1)

Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100900411B1 (en) 2006-08-28 2009-06-01 주식회사 엘지화학 Secondary Battery Including One-way Exhaust Valve
US8956743B2 (en) 2006-08-28 2015-02-17 Lg Chem, Ltd. Secondary battery including one-way exhaust member

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100900411B1 (en) 2006-08-28 2009-06-01 주식회사 엘지화학 Secondary Battery Including One-way Exhaust Valve
US8071231B2 (en) 2006-08-28 2011-12-06 Lg Chem, Ltd. Secondary battery including one-way exhaust valve
US8956743B2 (en) 2006-08-28 2015-02-17 Lg Chem, Ltd. Secondary battery including one-way exhaust member

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