JP2002280272A - Electric double-layer capacitor - Google Patents
Electric double-layer capacitorInfo
- Publication number
- JP2002280272A JP2002280272A JP2001080180A JP2001080180A JP2002280272A JP 2002280272 A JP2002280272 A JP 2002280272A JP 2001080180 A JP2001080180 A JP 2001080180A JP 2001080180 A JP2001080180 A JP 2001080180A JP 2002280272 A JP2002280272 A JP 2002280272A
- Authority
- JP
- Japan
- Prior art keywords
- electric double
- layer capacitor
- double layer
- curvature
- curved surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電気二重層キャパ
シタに関するものであり、特に可撓性の外装材によって
封口した復帰可能な圧力開放弁を設けた電気二重層キャ
パシタに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric double layer capacitor, and more particularly to an electric double layer capacitor provided with a resettable pressure release valve sealed with a flexible outer material.
【０００２】[0002]
【従来の技術】電気二重層キャパシタは、分極性電極と
電解液との界面に形成される電気二重層容量を利用した
キャパシタであり、誘電体を介在させて電極を配置した
キャパシタに比べてはるかに容量が大きなことを特徴と
しており、電気二重層キャパシタは、電力貯蔵手段にお
ける有力な手段として開発が進められている。2. Description of the Related Art An electric double layer capacitor is a capacitor utilizing an electric double layer capacitance formed at an interface between a polarizable electrode and an electrolytic solution, and is far more versatile than a capacitor having electrodes arranged with a dielectric material interposed therebetween. The electric double layer capacitor is characterized by having a large capacity, and is being developed as a promising power storage means.
【０００３】電気二重層キャパシタには、電解液として
水系溶媒を用いたものと、非水系溶媒を用いたものが知
られている。水系溶媒を用いたものは、水の電気分解が
起こる電圧以上の電圧を印加することはできないが、非
水溶媒電解液を用いたものは、水系溶媒を用いた場合に
比べて高い電圧で使用することができるという特徴を有
している。キャパシタに蓄積される電気エネルギーは、
１／２ＣＶ2 で表されるように、電圧を高くすることに
より電気エネルギーの貯蔵の効率が大きくなると言う特
徴を有している。したがって、非水溶媒を用いた電解液
を使用した電気二重層キャパシタは、電力貯蔵等のエネ
ルギー貯蔵の用途に適したものであるということができ
る。[0003] As electric double layer capacitors, those using an aqueous solvent as an electrolytic solution and those using a non-aqueous solvent are known. An aqueous solvent cannot apply a voltage higher than the voltage at which water electrolysis occurs, but a non-aqueous electrolyte uses a higher voltage than an aqueous solvent. It has the feature that it can be done. The electrical energy stored in the capacitor is
As represented by 1/2 CV 2 , it has a feature that the efficiency of storage of electric energy increases by increasing the voltage. Therefore, it can be said that an electric double layer capacitor using an electrolytic solution using a non-aqueous solvent is suitable for use in energy storage such as power storage.
【０００４】非水溶媒電解液を用いた電気二重層キャパ
シタは、電解液中に大気中の水分が浸入すると電解液の
電気分解電圧が低下したり、あるいは非水溶媒電解液が
分解するという問題点があった。そこで、非水溶媒電解
液を用いた電気二重層キャパシタにおいては、電気二重
層キャパシタ中に大気中の水分が浸入することがないよ
うに収納容器を封口して密閉したものが用いられてい
る。電気二重層キャパシタを自動車等の電源に利用する
場合には静電容量等の電気的特性と共に、質量が小さ
く、質量あたりのエネルギー密度が大きなことが重要と
なる。このため、自動車等の電源用に用いる場合には、
金属缶を外装材としたものに代えて、質量が小さな合成
樹脂製フィルムをアルミニウム箔等と積層した可撓性外
装材を用いた電気二重層キャパシタが好ましいものと考
えられている。An electric double layer capacitor using a non-aqueous solvent electrolyte has a problem in that when moisture in the air enters the electrolyte, the electrolysis voltage of the electrolyte decreases or the non-aqueous solvent electrolyte is decomposed. There was a point. Therefore, in an electric double-layer capacitor using a non-aqueous solvent electrolyte, a storage container is sealed and sealed so that moisture in the atmosphere does not enter the electric double-layer capacitor. When an electric double layer capacitor is used for a power source of an automobile or the like, it is important that the mass is small and the energy density per mass is large, in addition to electric characteristics such as capacitance. For this reason, when used for power sources such as automobiles,
It is considered that an electric double layer capacitor using a flexible exterior material obtained by laminating a synthetic resin film having a small mass with aluminum foil or the like instead of using the metal can as the exterior material is considered to be preferable.
【０００５】一方、収納容器を封口した電気二重層キャ
パシタにおいては、二次電池のように物質の化学的な変
化を伴わないために劣化が小さいものの、電解液等の使
用材料の分解、材料中に吸着されていた水分の脱着等に
よって内部の圧力が高まることがあった。リチウムイオ
ン電池等の非水電解液二次電池における気体の発生によ
る内部の圧力の増加の場合には、化学変化が進み電池と
しての機能が失われ、回復不可能となることが一般的で
ある。したがって、これらの電池に設ける圧力開放弁
は、薄肉部が開裂あるいは破断する復帰不可能なものが
用いられていた。On the other hand, in an electric double layer capacitor in which a storage container is sealed, although deterioration does not occur because a chemical change of a substance is not involved unlike a secondary battery, decomposition of a used material such as an electrolytic solution, The internal pressure sometimes increased due to the desorption of moisture adsorbed on the surface. In the case of an increase in internal pressure due to generation of gas in a non-aqueous electrolyte secondary battery such as a lithium ion battery, it is common that chemical change proceeds and the function as a battery is lost, and the battery cannot be recovered. . Therefore, a non-returnable pressure release valve provided in these batteries has been used in which a thin portion is cut or broken.
【０００６】一方、電気二重層キャパシタにおいては、
電解液が所定の量以下に低下しない限り、その後も引き
続き利用することが可能であるという特徴を有してお
り、電気二重層キャパシタにおいて、復帰可能な圧力開
放弁を装着することは極めて有効な手段である。復帰可
能な圧力開放弁としては、ばねの反発力を用いたもの等
が数多く知られているが、合成樹脂フィルムのような可
撓性の部材を用いた電気二重層キャパシタにおいて、可
撓性の外装材への装着が容易な小型の回復可能な圧力開
放弁はなかった。On the other hand, in an electric double layer capacitor,
As long as the electrolyte does not drop below a predetermined amount, it can be used continuously thereafter.In an electric double layer capacitor, it is extremely effective to mount a resettable pressure release valve. Means. There are many known resettable pressure relief valves that use the repulsive force of a spring. However, in an electric double layer capacitor using a flexible member such as a synthetic resin film, a flexible There was no small, recoverable pressure relief valve that was easy to attach to the cladding.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、非水溶媒電
解液を用いた電気二重層キャパシタにおいて、可撓性の
外装材に対して復帰可能な圧力開放弁を取り付けること
を可能とし、性能を長期に維持することが可能な電気二
重層キャパシタを提供することを課題とするものであ
る。SUMMARY OF THE INVENTION The present invention provides an electric double layer capacitor using a non-aqueous solvent electrolyte, in which a returnable pressure release valve can be attached to a flexible exterior material, and the performance is improved. It is an object of the present invention to provide an electric double layer capacitor capable of maintaining the electric resistance for a long time.
【０００８】[0008]
【課題を解決するための手段】本発明の課題は、可撓性
の外装材によって封口した電気二重層キャパシタにおい
て、電気二重層キャパシタ外面に向かって凹状の第１の
曲率の曲面を有し、電気二重層キャパシタの内部と連通
口を有するカップ状の第１の部材と、電気二重層キャパ
シタの内部へ向かって凸状であって第１の曲率の曲面よ
りも小さな曲率を有した第２の部材が、前記連通口の周
囲を覆う板状の弾性体を介して接触し、第１の部材と第
２の部材が前記曲面以外の部分において固着され、第２
の部材には板状の弾性体との接触部以外に、第１の部材
と第２の部材によって形成される内部空間と外部との連
通口を形成した圧力開放弁を設けた電気二重層キャパシ
タによって解決することができる。また、弾性体の両面
には、粘着性物質を塗布した前記の圧力開放弁を設けた
電気二重層キャパシタである。SUMMARY OF THE INVENTION An object of the present invention is to provide an electric double layer capacitor sealed with a flexible exterior material, having a curved surface having a first curvature concave toward the outer surface of the electric double layer capacitor, A cup-shaped first member having a communication port with the inside of the electric double layer capacitor; and a second member convex toward the inside of the electric double layer capacitor and having a curvature smaller than the curved surface having the first curvature. A member contacts through a plate-shaped elastic body that covers the periphery of the communication port, and the first member and the second member are fixed at a portion other than the curved surface.
An electric double layer capacitor provided with a pressure release valve forming a communication port between an internal space formed by a first member and a second member and the outside, in addition to a contact portion with a plate-shaped elastic body, Can be solved by Further, the electric double layer capacitor is provided with the pressure release valve coated with an adhesive substance on both surfaces of the elastic body.
【０００９】[0009]
【発明の実施の形態】本発明は、非水溶媒電解液を用い
た可撓性の外装材によって封口した電気二重層キャパシ
タにおいて、電気二重層キャパシタ内部の圧力を復帰可
能な圧力開放弁を用いて開放した後には、再度電気二重
層キャパシタを使用することが可能であり、また定常状
態では、大きな圧力で密閉しなくとも比較的小さな密着
力によって水分等の浸入を防止することができ、電気二
重層キャパシタの性能を維持することが可能であること
を見出し本発明を想到したものである。BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to an electric double-layer capacitor sealed with a flexible exterior material using a non-aqueous solvent electrolyte, wherein a pressure release valve capable of restoring the pressure inside the electric double-layer capacitor is used. After opening, it is possible to use the electric double layer capacitor again, and in a steady state, it is possible to prevent the invasion of moisture and the like by a relatively small adhesion force without sealing with a large pressure. The present inventors have found that the performance of a double-layer capacitor can be maintained, and conceived the present invention.
【００１０】以下に、図面を参照して本発明を説明す
る。図１は、本発明の電気二重層キャパシタを説明する
図であり、一部を切り欠いた斜視図である。本発明の電
気二重層キャパシタ１は、非水溶媒電解液を用いたもの
であり、キャパシタ要素２は可撓性の外装材３によって
封口されており、可撓性の外装材３は、圧力開放弁４を
有している。したがって、電気二重層キャパシタ内部の
圧力が増加した場合には、圧力開放弁４が作動し内部圧
力を開放することができ、内部圧力の開放の後には再度
電気二重層キャパシタとして使用可能であるという特徴
を有している。The present invention will be described below with reference to the drawings. FIG. 1 is a diagram illustrating an electric double layer capacitor of the present invention, and is a perspective view with a part cut away. The electric double layer capacitor 1 of the present invention uses a non-aqueous solvent electrolyte, and the capacitor element 2 is sealed by a flexible exterior material 3. It has a valve 4. Therefore, when the pressure inside the electric double layer capacitor increases, the pressure release valve 4 operates to release the internal pressure, and after the release of the internal pressure, it can be used again as an electric double layer capacitor. Has features.
【００１１】図２は、本発明の電気二重層キャパシタの
圧力開放弁を説明する図である。図２（Ａ）は、圧力開
放弁の全体を説明する斜視図であり、電気二重層キャパ
シタ内部側から見た図である。また、図２（Ｂ）および
図２（Ｃ）は、圧力開放弁の動作を説明する断面を説明
する図である。圧力開放弁４は、被覆体５によって可撓
性の外装材３に接合されている。被覆体５は熱融着性が
良好なポリエチレン、ポリプロピレン等のポリオレフィ
ン系の材料によって作製されたものであり、外装材のポ
リオレフィンフィルム面６に対して、被覆体５を対向さ
せて熱融着することによって取り付けることができる。FIG. 2 is a view for explaining the pressure release valve of the electric double layer capacitor of the present invention. FIG. 2A is a perspective view illustrating the entire pressure release valve, as viewed from the inside of the electric double layer capacitor. 2 (B) and 2 (C) are diagrams illustrating a cross section for explaining the operation of the pressure release valve. The pressure release valve 4 is joined to the flexible exterior material 3 by a cover 5. The coating 5 is made of a polyolefin-based material such as polyethylene and polypropylene having good heat-sealing properties. The coating 5 is heat-fused with the coating 5 facing the polyolefin film surface 6 of the exterior material. Can be mounted by
【００１２】本発明の圧力開放弁４は、ポリプロピレン
等からなる被覆体５の内部に、ポリプロピレン等からな
る第１の曲率の曲面７を有し、中央部に電気二重層キャ
パシタ内部との連通口８を有するカップ状の第１の部材
９を有しており、カップ状の第１の部材の底面１０は被
覆体５と熱融着されて、両者の間を気体等が漏洩しない
状態とされている。カップ状の第１の部材９の曲面７に
は、第１の曲率よりも曲率が小さな第２の曲率の曲面１
１を有した第２の部材１２が、弾性体１３を介して接す
ると共に、第２の部材１２の曲面部以外において、カッ
プ状の第１の部材９の壁部１４とが熱融着等の方法によ
って固着されている。また、第２の部材には、カップ状
の第１の部材９と第２の部材によって形成される内部空
間と外部とを結ぶ溝状の連通口１５と、溝状の連通口１
５に結合した外部連通口１６が形成されている。更に、
第２の部材に設けた外部連通口１６は、外装材に設けた
穴１７に結合されている。The pressure release valve 4 of the present invention has a curved surface 7 of a first curvature made of polypropylene or the like inside a coating 5 made of polypropylene or the like, and a communication port with the inside of the electric double layer capacitor at the center. 8 has a cup-shaped first member 9, and the bottom surface 10 of the cup-shaped first member is heat-sealed to the cover 5 so that gas and the like do not leak between the two. ing. The curved surface 7 of the cup-shaped first member 9 has a second curved surface 1 having a smaller curvature than the first curvature.
1 is in contact with the second member 12 via the elastic body 13, and other than the curved surface of the second member 12, the wall 14 of the cup-shaped first member 9 is bonded to the wall 14 by heat fusion or the like. Secured by method. Further, the second member includes a groove-shaped communication port 15 connecting the internal space formed by the cup-shaped first member 9 and the second member to the outside, and a groove-shaped communication port 1.
An external communication port 16 is formed which is connected to the external communication port 5. Furthermore,
The external communication port 16 provided in the second member is connected to a hole 17 provided in the exterior material.
【００１３】弾性体１３と第１の部材９の間、および弾
性体１３と第２の部材１２の間には、シリコーン油、フ
ッ素油、あるいはフッ素系のグリース等の化学的に安定
で、揮発することがない粘性物質が充填されていること
が好ましい。また、弾性体１３には、非水溶媒電解液に
対して安定なフッ素ゴム、エチレン−プロピレンゴム等
を用いることができる。これによって、図２（Ｂ）に示
すように、電気二重層キャパシタの内部の圧力が外部の
圧力に比べて高くない場合には、弾性体１３はそれ自体
が有する反発力と粘性物質の作用によって、曲率が大き
な第１の曲面に密着し、連通口８を確実に塞ぐことが可
能となる。Between the elastic member 13 and the first member 9 and between the elastic member 13 and the second member 12, there is provided a chemically stable and volatile material such as silicone oil, fluorine oil or fluorine-based grease. It is preferable that a viscous substance that does not do so is filled. Further, as the elastic body 13, fluorine rubber, ethylene-propylene rubber, or the like that is stable with respect to the non-aqueous solvent electrolyte can be used. Accordingly, as shown in FIG. 2B, when the internal pressure of the electric double layer capacitor is not higher than the external pressure, the elastic body 13 acts due to the repulsive force of itself and the action of the viscous substance. Thus, the communication port 8 can be reliably closed by closely adhering to the first curved surface having a large curvature.
【００１４】一方、電気二重層キャパシタの内部の圧力
が外部の圧よりも高くなると、図２（Ｃ）に示すよう
に、内部の気体の圧力によって、弾性体１３が第２の部
材の曲面１１側に押し上げられると、第１の部材の曲面
７と弾性体１３との間に空間が形成されて、内部の気体
が矢印で示されるように放出されて、電気二重層キャパ
シタ内部の圧力が開放される。次いで、内部の気体が放
出されて、電気二重層キャパシタ内部の圧力が外部の圧
力と同等の圧力となると、図２（Ｂ）に示す状態へと復
帰し、外部からの水分の浸透等を防止することができ
る。On the other hand, when the internal pressure of the electric double layer capacitor becomes higher than the external pressure, as shown in FIG. 2 (C), the elastic body 13 causes the elastic member 13 to move the curved surface 11 of the second member by the pressure of the internal gas. When pushed up to the side, a space is formed between the curved surface 7 of the first member and the elastic body 13, the gas inside is released as shown by the arrow, and the pressure inside the electric double layer capacitor is released. Is done. Next, when the gas inside is released and the pressure inside the electric double layer capacitor becomes equal to the outside pressure, the state returns to the state shown in FIG. 2 (B) and the penetration of moisture from the outside is prevented. can do.
【００１５】図３は、圧力開放弁を構成する第１の部
材、および第２の部材の一実施例を説明する図であり、
図３（Ａ）は、第１の部材の平面図を示し、図３（Ｂ）
は、図３（Ａ）においてＡ−Ａ’線で切断した断面図を
示し、図３（Ｃ）は、第２の部材の平面図を示し、図３
（Ｄ）は、図３（Ｃ）においてＢ−Ｂ’線で切断した断
面図を示す。カップ状の第１の部材９は、底部の中央部
に連通口８を有し、底部は第１の曲率の曲面７を有して
いる。カップ状の第１の部材９に上部から取り付けられ
る第２の部材１２には、第１の曲率の曲面７よりも、曲
率が小さな第２の曲面１１が形成されている。また、第
１の部材９の内部と第２の部材によって形成される内部
空間と電気二重層キャパシタの外部とをつなげる溝状連
通口１５が曲面１１上に形成されており、溝状連通口１
５は外部連通口１６と結合している。また、第１の部材
の第１の曲面上に弾性体を装着した後に、第２の部材の
曲面を形成していない端部を第１の部材の壁部１４にお
いて、熱融着されて固着されている。FIG. 3 is a view for explaining one embodiment of the first member and the second member constituting the pressure release valve.
FIG. 3A shows a plan view of the first member, and FIG.
3A is a cross-sectional view taken along line AA ′ in FIG. 3A, and FIG. 3C is a plan view of the second member.
FIG. 3D is a cross-sectional view taken along line BB ′ in FIG. The cup-shaped first member 9 has a communication port 8 at the center of the bottom, and the bottom has a curved surface 7 having a first curvature. A second member 12 attached to the cup-shaped first member 9 from above has a second curved surface 11 having a smaller curvature than the curved surface 7 having the first curvature. Further, a groove-shaped communication port 15 for connecting the inside of the first member 9 and the internal space formed by the second member to the outside of the electric double layer capacitor is formed on the curved surface 11.
5 is connected to the external communication port 16. Further, after the elastic member is mounted on the first curved surface of the first member, the end of the second member, which does not have the curved surface, is fixed to the wall portion 14 of the first member by heat fusion. Have been.
【００１６】図４は、圧力開放弁を構成する第１の部
材、および第２の部材の他の実施例を説明する図であ
り、図４（Ａ）は、第１の部材の平面図を示し、図４
（Ｂ）は、図４（Ａ）においてＡ−Ａ’線で切断した断
面図を示し、図４（Ｃ）は、第２の部材の平面図を示
し、図４（Ｄ）は、図４（Ｃ）においてＢ−Ｂ’線で切
断した断面図を示し、図４（Ｄ）は、可撓性の外装材に
装着した例を示す図である。カップ状の第１の部材９
は、底部の中央部に連通口８を有し、底部は第１の曲率
の曲面７を有している。カップ状の第１の部材９の壁部
１４の内面には、内面を一周する凹部１７が形成されて
いる。また、第１の部材９と第２の部材によって形成さ
れる内部空間と電気二重層キャパシタの外部とをつなげ
る溝状連通口１５が曲面１１上に形成されており、溝状
連通口１５は外部連通口１６と結合している。FIG. 4 is a view for explaining another embodiment of the first member and the second member constituting the pressure release valve. FIG. 4A is a plan view of the first member. FIG. 4
4B is a cross-sectional view taken along line AA ′ in FIG. 4A, FIG. 4C is a plan view of the second member, and FIG. FIG. 4C is a cross-sectional view taken along the line BB ′, and FIG. 4D is a diagram illustrating an example in which a flexible exterior member is mounted. Cup-shaped first member 9
Has a communication port 8 at the center of the bottom, and the bottom has a curved surface 7 having a first curvature. On the inner surface of the wall portion 14 of the cup-shaped first member 9, a concave portion 17 is formed which goes around the inner surface. Further, a groove-like communication port 15 for connecting the internal space formed by the first member 9 and the second member to the outside of the electric double layer capacitor is formed on the curved surface 11, and the groove-like communication port 15 is formed on the outside. It is connected to the communication port 16.
【００１７】第１の部材の第１の曲面７上に弾性体１３
を装着した後に、第２の部材１２の周囲の端部１８を第
１の部材の壁部１４の内面に形成した凹部１７に係合し
て、第２の部材と第１の部材の固着させた後に、図２に
示したように被覆体で被覆して可撓性の外装材に熱融着
によって取り付けることができる。An elastic body 13 is provided on the first curved surface 7 of the first member.
After the second member 12 is mounted, the peripheral end 18 of the second member 12 is engaged with the concave portion 17 formed on the inner surface of the wall portion 14 of the first member, thereby fixing the second member and the first member. Thereafter, as shown in FIG. 2, it can be covered with a cover and attached to a flexible exterior material by heat fusion.
【００１８】また、図４（Ｄ）に示すように、第１の部
材と第２の部材を組み立てた後に、壁部１４を直接に可
撓性の外装材３に熱融着しても良く、これによって被覆
体を用いることなく可撓性の外装材に装着することが可
能である。As shown in FIG. 4D, after assembling the first member and the second member, the wall portion 14 may be directly heat-sealed to the flexible exterior material 3. Thereby, it is possible to mount the cover on a flexible exterior material without using a cover.
【００１９】[0019]
【発明の効果】本発明は、可撓性の外装材を用いて封口
した電気二重層キャパシタに対して、大幅な質量の増加
を伴うことなく圧力開放弁を容易に装着することができ
るので、使用時に内部圧力が増大した場合にも安全に内
部圧力を開放することが可能な電気二重層キャパシタを
得ることができる。According to the present invention, a pressure relief valve can be easily mounted on an electric double layer capacitor sealed with a flexible exterior material without a significant increase in mass. An electric double layer capacitor capable of safely releasing the internal pressure even when the internal pressure increases during use can be obtained.
【図１】図１は、本発明の電気二重層キャパシタを説明
する図であり、一部を切り欠いた斜視図である。FIG. 1 is a view for explaining an electric double layer capacitor of the present invention, and is a partially cutaway perspective view.
【図２】図２は、本発明の電気二重層キャパシタの圧力
開放弁を説明する図である。FIG. 2 is a diagram illustrating a pressure release valve of the electric double layer capacitor of the present invention.
【図３】図３は、圧力開放弁を構成する第１の部材、お
よび第２の部材の一実施例を説明する図である。FIG. 3 is a diagram illustrating an example of a first member and a second member that constitute a pressure release valve.
【図４】図４は、圧力開放弁を構成する第１の部材、お
よび第２の部材の一実施例を説明する図である。FIG. 4 is a diagram illustrating an example of a first member and a second member that constitute a pressure release valve.
１…電気二重層キャパシタ、２…キャパシタ要素、３…
可撓性の外装材、４…圧力開放弁、５…被覆体、６…ポ
リオレフィンフィルム面、７…第１の曲率の曲面、８…
連通口、９…第１の部材、１０…第１の部材の底面、１
１…第２の曲率の曲面、１２…第２の部材、１３…弾性
体、１４…壁部、１５…溝状の連通口、１６…外部連通
口、１７…凹部、１８…端部1. Electric double layer capacitor 2. Capacitor element 3.
Flexible exterior material, 4 ... pressure release valve, 5 ... cover, 6 ... polyolefin film surface, 7 ... curved surface of first curvature, 8 ...
Communication port, 9: first member, 10: bottom surface of first member, 1
DESCRIPTION OF SYMBOLS 1 ... Curved surface of 2nd curvature, 12 ... 2nd member, 13 ... Elastic body, 14 ... Wall part, 15 ... Groove-shaped communication port, 16 ... External communication port, 17 ... Depression, 18 ... End part
Claims (2)
重層キャパシタにおいて、電気二重層キャパシタの外面
に向かって凹状の第１の曲率の曲面を有し、電気二重層
キャパシタの内部と連通口を有するカップ状の第１の部
材と、電気二重層キャパシタ内部へ向かって凸状の第１
の曲率の曲面よりも小さな曲率を有した第２の部材が、
前記連通口の周囲を覆う板状の弾性体を介して接触し、
第１の部材と第２の部材が前記曲面以外の部分において
固着され、第２の部材には板状の弾性体との接触部以外
に、第１の部材と第２の部材によって形成される内部空
間と外部との連通口を形成した圧力開放弁を設けたこと
を特徴とする電気二重層キャパシタ。1. An electric double-layer capacitor sealed with a flexible exterior material, the electric double-layer capacitor having a curved surface having a first curvature concave toward an outer surface of the electric double-layer capacitor, and communicating with the inside of the electric double-layer capacitor. And a first member having a convex shape toward the inside of the electric double layer capacitor.
The second member having a curvature smaller than the curvature of the curvature of
Contact via a plate-shaped elastic body covering the periphery of the communication port,
The first member and the second member are fixed at portions other than the curved surface, and the second member is formed by the first member and the second member other than the contact portion with the plate-shaped elastic body. An electric double layer capacitor provided with a pressure release valve having a communication port between an internal space and the outside.
た圧力開放弁を設けたことを特徴とする請求項１記載の
電気二重層キャパシタ。2. The electric double layer capacitor according to claim 1, wherein a pressure release valve coated with an adhesive substance is provided on both sides of the elastic body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001080180A JP2002280272A (en) | 2001-03-21 | 2001-03-21 | Electric double-layer capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001080180A JP2002280272A (en) | 2001-03-21 | 2001-03-21 | Electric double-layer capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002280272A true JP2002280272A (en) | 2002-09-27 |
Family
ID=18936503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001080180A Pending JP2002280272A (en) | 2001-03-21 | 2001-03-21 | Electric double-layer capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002280272A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003037028A (en) * | 2001-07-26 | 2003-02-07 | Shizuki Electric Co Inc | Capacitor |
-
2001
- 2001-03-21 JP JP2001080180A patent/JP2002280272A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003037028A (en) * | 2001-07-26 | 2003-02-07 | Shizuki Electric Co Inc | Capacitor |
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