JP4356291B2 - Relief valve structure of electric double layer capacitor - Google Patents

Relief valve structure of electric double layer capacitor Download PDF

Info

Publication number
JP4356291B2
JP4356291B2 JP2002226831A JP2002226831A JP4356291B2 JP 4356291 B2 JP4356291 B2 JP 4356291B2 JP 2002226831 A JP2002226831 A JP 2002226831A JP 2002226831 A JP2002226831 A JP 2002226831A JP 4356291 B2 JP4356291 B2 JP 4356291B2
Authority
JP
Japan
Prior art keywords
pressure release
rubber
pedestal
electric double
double layer
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.)
Expired - Fee Related
Application number
JP2002226831A
Other languages
Japanese (ja)
Other versions
JP2004071725A (en
Inventor
保雄 安藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meidensha Corp
Original Assignee
Meidensha Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Meidensha Corp filed Critical Meidensha Corp
Priority to JP2002226831A priority Critical patent/JP4356291B2/en
Publication of JP2004071725A publication Critical patent/JP2004071725A/en
Application granted granted Critical
Publication of JP4356291B2 publication Critical patent/JP4356291B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/13—Energy storage using capacitors

Landscapes

  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Description

【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の放圧弁構造に関する。詳しくは、アルミラミネートフィルムで包装された電気二重層キャパシタの放圧弁に関する。
【０００２】
【従来の技術】
現在、アルミラミネートフィルムを用いた包装方法は、リチウム電池、電気二重層キャパシタなどで広く使用されるようになっている。
その理由として、アルミ箔によるガス透過の遮断性と、ラミネートしている高分子フィルムの熱溶着性の両面によって、簡易に包装が可能で、シール性が確実であることと、コストが低いことが挙げられる。
【０００３】
通常、図７に示すように、アルミラミネートフィルム１０は中央にアルミ箔１１を配し、その上部に保護フィルム層１２、下部には溶着フィルム（以下、溶着層と言う）１３からなる３層以上のフィルムをラミネートさせてなるフィルムである。
このフィルム１０を用いて包装・シールする場合は、図７に示すように、２枚のアルミラミネートフィルム１０を向かい合わせ、内容物２０を入れた後に熱によるシールを行い包装を完了させる。
【０００４】
これにより、アルミ箔１１のガス遮断性の効果で長期間内容物が初期状態を保つことができる。
更に、電気化学素子の場合、図８のように、内容物２０として、電極２１、集電金属（端子）２２、セパレータ２３等を含んでいる。
【０００５】
【発明が解決しようとする課題】
上述した電気化学素子を充放電させる際、電気化学素子中の構成材料乃至不純物等の電気分解によってガスが発生することが多く認められる。
そこで、従来の電気化学素子は、高圧に耐えられるよう構造材料として金属をふかしぼりした管などを用い、もし耐えられなくなった場合は、金属とゴムで構成した防爆弁により安全を確保していた。
【０００６】
しかし、アルミラミネートフィルムによる構成では、このような防爆弁の使用は難しく取り付けも不可能だった。
本発明は、アルミラミネートフィルムにより包装された電気二重層キャパシタをより信頼性が高く、長期的に安定した性能が保持できるような、放圧弁を提供することを目的とする。
【０００７】
即ち、本発明は、樹脂で構成された台座とそれに取り付けるゴム単体で構成されている放圧ゴムを組み合わせた放圧弁を用いることによって、取り外し、取り付けが容易な放圧弁を提供するものである。
【０００８】
【課題を解決するための手段】
上記課題を解決する本発明の請求項１に係る電気二重層キャパシタの放圧弁構造は、アルミラミネートフィルムで包装された電気二重層キャパシタに放圧弁を設けた構造において、前記放圧弁として、前記アルミラミネートフィルムの内側面における溶着層と同一材料の樹脂で構成された円筒形状をなすと共に上端の周縁にリブを有し、かつ、下端の内周内側には環状部を有する台座と、該台座の該環状部の上に乗るように前記台座の内側に嵌合することにより取り付けられる放圧ゴムとの組み合わせを用い、前記アルミラミネートフィルムには前記台座と略同一径の穴を設けて、前記穴から前記放圧ゴムが露出する状態となるように前記リブを前記穴の周縁における前記溶着層に溶着することを特徴とする。
【００１０】
上記課題を解決する本発明の請求項２に係る電気二重層キャパシタの放圧弁構造は、請求項１における前記台座乃至放圧ゴムのどちらか又は双方の接触面にリブを付けたことを特徴とする。
【００１１】
上記課題を解決する本発明の請求項３に係る電気二重層キャパシタの放圧弁構造は、請求項１又は２における前記台座と前記放圧ゴムの間に、放圧機能とは異なる機能を発現させる物質を挿入することを特徴とする。
【００１２】
【発明の実施の形態】
〔実施例１〕
本発明の第一の実施例に係る放圧弁構造を図１及び図２に示す。
本実施例は、アルミラミネートフィルム１０により封止された電気二重層キャパシタにおいて、以下のような放圧弁３０を取り付けたものである。
即ち、放圧弁３０は、樹脂で構成された台座３１と、この台座３１に取り付けられるゴム材質単体よりなる放圧ゴム３２との組み合わせからなる。
【００１３】
台座３１は、アルミラミネートフィルム１０の溶着層１３の材質と同一の材質を用いて成型したものであり、一般的にポリエチレンかポリプロピレン製である。
台座３１は、ほぼ円筒形状をなすと共に上端の周縁にリブ３１ａを有し、その下端の内周内側には環状部３１ｂを有する。環状部３１ｂの内側は、中空である。
台座３１の内側には、その環状部３１ｂの上に乗るように放圧ゴム３２を嵌合して取り付ける。
【００１４】
放圧ゴム３２は、ゴム材質単体で構成され、断面形状がほぼ台形状をなす殻形状であり、底部が開放されている。
放圧ゴム３２の頂部センターには、スリット３２ａが形成されている。そのため、内部の圧力上昇時にはスリット３２ａが開き放圧する構成である。
放圧ゴム３２は、一般的にダックビルバルブと称している。
台座３１は、ラミネートフィルム１０の内側よりリブ３１ａを溶着層１３に溶着することにより取り付けられる。
尚、予めアルミラミネートフィルム１０に台座３１とほぼ同一径の穴を開けて、そこから放圧ゴム３２が露出する状態とする。
【００１５】
このような構成の放圧弁３０を取り付けた電気二重層キャパシタでは、電気二重層キャパシタ内で発生したガスにより内圧が上昇した時に、放圧ゴム３２の頂部センターに形成したスリット３２ａが開き安全に放圧することができる。
また、放圧弁３０は、アルミラミネートフィルム１０と溶着させる台座３１とこの台座３１に取り付けられる放圧ゴム３２との組み合わせであるため、アルミラミネートフィルム１０と溶着させる場合は台座３１だけを加熱接着させるだけで後から放圧ゴム３２を取り付ければよいので、構成がシンプルであり取り付けミスが少ない。
【００１６】
仮に、放圧ゴム３２が何らかの原因で不具合を起こしても、放圧ゴム３２だけを取り替えることで容易に機能を回復させることが可能である。
更に、電気二重層キャパシタ内の物質が放圧弁３０を通じて漏れないように、例えば、図３に示すように、台座３１の環状部３１ｂの内側に多数の小穴３３或いはメッシュ３４を配置することもできる。
【００１７】
〔実施例２〕
本発明の第二の実施例を図４（ａ）に示す。
本実施例は、放圧ゴム３２の外周面に単数又は複数のリブ３５を設けたものである。その他の構成は、前述した実施例と同一であり、同様な作用効果を奏する。
本実施例では、台座３１に対する放圧ゴム３２の接触面に単数乃至複数のリブ３５を設けたため、台座３１から放圧ゴム３２の抜けを防止できるという効果を奏する。
【００１８】
〔実施例３〕
本発明の第二の実施例を図４（ｂ）に示す。
本実施例は、台座３１の内周面に単数又は複数のリブ３６を設けたものである。その他の構成は、前述した実施例と同一であり、同様な作用効果を奏する。
本実施例では、放圧ゴム３２に対する台座３１の接触面に単数乃至複数のリブ３６を設けたため、台座３１から放圧ゴム３２の抜けを防止できるという効果を奏する。
更に、本実施例に実施例２を組み合わせて、放圧ゴム３２の外周面に単数又は複数のリブ３５を設け、且つ、台座３１の内周面に単数又は複数のリブ３６を設けても良い。
【００１９】
〔実施例４〕
本発明の第三の実施例を図５に示す。
本実施例は、台座３１と放圧ゴム３２の間に、隙間である空間Ａを設置させ、この空間Ａに各種機能の材料を挿入し、放圧構造に付加させた機能を付与させるたものである。
例えば、空間Ａに、繊維状物質を挿入し、放圧時に電解液の吹き出しを防止させることができる。その繊維状物質の機能が低下した場合は容易に交換が可能である。
尚、その他の構成は、前述した実施例１と同様であり、同様な作用効果を奏する。
【００２０】
〔実施例５〕
本実施例は、実施例４の空間Ａに、選択性透過膜を配置し物質透過を制御させるものである。その選択性透過膜の機能が低下した場合は容易に交換が可能である。
尚、その他の構成は、前述した実施例１と同様であり、同様な作用効果を奏する。
【００２１】
〔実施例６〕
本実施例は、実施例４の空間Ａに、水分吸収剤、ガス吸収剤、等の薬品を挿入し、ゴム部分、スリット部分からのガス浸入を防止させるものである。その機能が低下した場合は容易に交換が可能である。
尚、その他の構成は、前述した実施例１と同様であり、同様な作用効果を奏する。
【００２２】
〔実施例７〕
本発明の第七の実施例を図６に示す。
本実施例は、放圧弁３０の取り付けられる態様を示すものである。
図６に示すように、放圧弁３０の両側にスペーサ３７を設けることにより、放圧弁３０の機能を阻害することなく、アルミラミネートフィルムの上部溶着面にも接続することが可能となる。
尚、その他の構成は、前述した実施例１と同様であり、同様な作用効果を奏する。
【００２３】
【発明の効果】
以上、実施例に基づいて具体的に説明したように、本発明によれば、以下の効果を奏する。
（１）アルミラミネートフィルムで封止された電気二重層キャパシタ内で発生したガスを安全に放圧する放圧弁を提供できる。
（２）放圧弁は、アルミラミネートフィルムと溶着させる台座と放圧ゴムの組合であるため、アルミラミネートフィルムと溶着させる場合は台座だけを加熱接着させるだけで後から放圧ゴムを取り付ければ良く、構成がシンプルであり取り付けミスが少ない。
（３）仮に、放圧ゴムが何らかの原因で不具合を起こしてもゴム部分だけを取り替えることで容易に機能を回復させることが可能である。
（４）台座乃至放圧ゴムのどちらか又は双方の接触面にリブをつければ、台座との接合がより堅固になり、信頼性が増大する。
（５）台座と放圧ゴムの間に、放圧機能とは異なる機能を発現させる物質を挿入すれば、弁構造の弱点である、弁を通しての物質の透過を防止することができるようになった。また、その物質は機能が低下した場合は容易に交換が可能である。
（６）上記効果で、アルミラミネートフィルムで包装される電気二重層キャパシタが今まで以上に長期にわたって安定な品質を保持できるようになった。
【図面の簡単な説明】
【図１】本発明の実施例１に係る電気二重層キャパシタの放圧弁構造を示す断面図である。
【図２】本発明の実施例１に係る台座、放圧ゴム及び放圧弁を示す説明図である。
【図３】台座の他の例を示す説明図である。
【図４】本発明の実施例２に係る放圧ゴム及び本発明の第三の実施例に係る台座を示す説明図である。
【図５】本発明の実施例４に係る放圧弁の説明図である。
【図６】本発明の実施例７に係る電気二重層キャパシタの放圧弁構造を示す斜視図である。
【図７】アルミラミネートフィルムによる包装方法を示す説明図である。
【図８】電気二重層キャパシタのアルミラミネートフィルムによる包装方法を示す説明図である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pressure release valve structure for an electric double layer capacitor . Specifically, the present invention relates to a pressure release valve for an electric double layer capacitor packaged with an aluminum laminate film.
[0002]
[Prior art]
At present, a packaging method using an aluminum laminate film is widely used in lithium batteries, electric double layer capacitors and the like.
The reason is that it can be easily packaged by both the gas permeation blocking property by the aluminum foil and the heat welding property of the laminated polymer film, and the sealing property is reliable and the cost is low. Can be mentioned.
[0003]
Normally, as shown in FIG. 7, the aluminum laminate film 10 has an aluminum foil 11 in the center, a protective film layer 12 at the top, and a weld film (hereinafter referred to as a weld layer) 13 at the bottom. It is a film formed by laminating these films.
When packaging and sealing using this film 10, as shown in FIG. 7, the two aluminum laminate films 10 face each other, and after putting the contents 20, sealing by heat is performed to complete the packaging.
[0004]
Thereby, the content can maintain an initial state for a long period of time by the gas barrier effect of the aluminum foil 11.
Furthermore, in the case of an electrochemical element, as shown in FIG. 8, the contents 20 include an electrode 21, a current collector metal (terminal) 22, a separator 23, and the like.
[0005]
[Problems to be solved by the invention]
When charging and discharging the above-described electrochemical element, it is often recognized that gas is generated by electrolysis of constituent materials or impurities in the electrochemical element.
Therefore, conventional electrochemical devices used pipes made of metal squeezed as a structural material to withstand high pressures, and if they could not be tolerated, safety was ensured by explosion-proof valves made of metal and rubber. .
[0006]
However, with an aluminum laminate film, it was difficult to use such an explosion-proof valve and it was impossible to install it.
An object of the present invention is to provide a pressure relief valve that can maintain an electric double layer capacitor packaged with an aluminum laminate film with higher reliability and stable performance over the long term.
[0007]
That is, the present invention provides a pressure relief valve that is easy to remove and attach by using a pressure relief valve that combines a base made of resin and a pressure relief rubber composed of a single rubber attached to the base.
[0008]
[Means for Solving the Problems]
The pressure release valve structure for an electric double layer capacitor according to claim 1 of the present invention that solves the above-mentioned problems is a structure in which a pressure release valve is provided in an electric double layer capacitor packaged with an aluminum laminate film, wherein the aluminum release film is the aluminum together they form a cylindrical shape made of a resin of the welding layer of the same material at the inner surface of the laminate film have a rib on the periphery of the upper end, and the inner periphery inside of the lower end and the base having an annular portion, of the pedestal Using a combination with a pressure release rubber that is attached by fitting inside the pedestal so as to ride on the annular part, the aluminum laminate film is provided with a hole having substantially the same diameter as the pedestal, and the hole The rib is welded to the welded layer at the periphery of the hole so that the pressure-release rubber is exposed from the hole.
[0010]
The pressure release valve structure for an electric double layer capacitor according to claim 2 of the present invention for solving the above-mentioned problems is characterized in that a rib is attached to the contact surface of either the pedestal or the pressure release rubber in claim 1 or both. To do.
[0011]
The pressure release valve structure of the electric double layer capacitor according to claim 3 of the present invention that solves the above-described problem causes a function different from the pressure release function to be manifested between the pedestal and the pressure release rubber in claim 1 or 2 . It is characterized by inserting a substance.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
[Example 1]
A pressure relief valve structure according to a first embodiment of the present invention is shown in FIGS.
In this embodiment, an electric double layer capacitor sealed with an aluminum laminate film 10 is provided with a pressure release valve 30 as described below.
That is, the pressure release valve 30 includes a combination of a pedestal 31 made of resin and a pressure release rubber 32 made of a single rubber material attached to the pedestal 31.
[0013]
The pedestal 31 is formed by using the same material as the material of the welding layer 13 of the aluminum laminate film 10 and is generally made of polyethylene or polypropylene.
The pedestal 31 has a substantially cylindrical shape and has a rib 31a at the periphery of the upper end, and an annular portion 31b on the inner periphery of the lower end. The inside of the annular portion 31b is hollow.
A pressure release rubber 32 is fitted and attached to the inside of the base 31 so as to ride on the annular portion 31b.
[0014]
The pressure release rubber 32 is formed of a single rubber material, has a shell shape with a substantially trapezoidal cross-section, and has a bottom open.
A slit 32 a is formed at the top center of the pressure release rubber 32. For this reason, the slit 32a is opened and released when the internal pressure rises.
The pressure release rubber 32 is generally called a duckbill valve.
The pedestal 31 is attached by welding the ribs 31 a to the welding layer 13 from the inside of the laminate film 10.
It should be noted that a hole having substantially the same diameter as that of the pedestal 31 is made in advance in the aluminum laminate film 10 so that the pressure release rubber 32 is exposed therefrom.
[0015]
In the electric double layer capacitor to which the pressure release valve 30 having such a configuration is attached, when the internal pressure rises due to the gas generated in the electric double layer capacitor , the slit 32a formed at the top center of the pressure release rubber 32 is opened and released safely. Can be pressed.
Moreover, since the pressure release valve 30 is a combination of a base 31 to be welded to the aluminum laminate film 10 and a pressure release rubber 32 attached to the base 31, only the base 31 is heated and bonded when it is welded to the aluminum laminate film 10. Since it is only necessary to attach the release rubber 32 later, the configuration is simple and there are few attachment mistakes.
[0016]
Even if the pressure release rubber 32 malfunctions for some reason, the function can be easily recovered by replacing only the pressure release rubber 32.
Further, as materials in the electric double layer capacitor does not leak through the relief valve 30, for example, as shown in FIG. 3, also be arranged a number of small holes 33 or mesh 34 inside the annular portion 31b of the pedestal 31 it can.
[0017]
[Example 2]
A second embodiment of the present invention is shown in FIG.
In this embodiment, one or a plurality of ribs 35 are provided on the outer peripheral surface of the pressure release rubber 32. Other configurations are the same as those of the above-described embodiment, and the same operational effects are achieved.
In this embodiment, since the single or plural ribs 35 are provided on the contact surface of the pressure release rubber 32 with respect to the pedestal 31, there is an effect that the pressure release rubber 32 can be prevented from coming off from the pedestal 31.
[0018]
Example 3
A second embodiment of the present invention is shown in FIG.
In this embodiment, one or more ribs 36 are provided on the inner peripheral surface of the base 31. Other configurations are the same as those of the above-described embodiment, and the same operational effects are achieved.
In the present embodiment, since the single or plural ribs 36 are provided on the contact surface of the pedestal 31 with respect to the pressure release rubber 32, the pressure release rubber 32 can be prevented from coming off from the pedestal 31.
Further, by combining Example 2 with Example 2, one or more ribs 35 may be provided on the outer peripheral surface of the pressure release rubber 32, and one or more ribs 36 may be provided on the inner peripheral surface of the base 31. .
[0019]
Example 4
A third embodiment of the present invention is shown in FIG.
In this embodiment, a space A which is a gap is installed between the pedestal 31 and the pressure release rubber 32, and materials having various functions are inserted into the space A to give the function added to the pressure release structure. It is.
For example, a fibrous substance can be inserted into the space A to prevent the electrolyte from blowing out when the pressure is released. If the function of the fibrous material is reduced, it can be easily replaced.
The other configuration is the same as that of the first embodiment described above, and provides the same effects.
[0020]
Example 5
In this example, a selective permeable membrane is arranged in the space A of Example 4 to control the material permeation. When the function of the selective permeable membrane is lowered, it can be easily replaced.
The other configuration is the same as that of the first embodiment described above, and provides the same effects.
[0021]
Example 6
In the present embodiment, chemicals such as a water absorbent and a gas absorbent are inserted into the space A of the fourth embodiment to prevent gas intrusion from the rubber portion and the slit portion. If its function is degraded, it can be easily replaced.
The other configuration is the same as that of the first embodiment described above, and provides the same effects.
[0022]
Example 7
A seventh embodiment of the present invention is shown in FIG.
The present embodiment shows a mode in which the pressure release valve 30 is attached.
As shown in FIG. 6, by providing the spacers 37 on both sides of the pressure release valve 30, it is possible to connect to the upper welding surface of the aluminum laminate film without hindering the function of the pressure release valve 30.
The other configuration is the same as that of the first embodiment described above, and provides the same effects.
[0023]
【The invention's effect】
As described above based on the embodiments, the present invention has the following effects.
(1) It is possible to provide a pressure relief valve that safely releases the gas generated in the electric double layer capacitor sealed with an aluminum laminate film.
(2) Since the pressure release valve is a combination of a pedestal to be welded to the aluminum laminate film and a pressure release rubber, when it is welded to the aluminum laminate film, it is only necessary to attach the pressure release rubber afterwards by simply heating and bonding the pedestal. Simple configuration and few installation mistakes.
(3) Even if the pressure-release rubber causes a problem for some reason, it is possible to easily restore the function by replacing only the rubber part.
(4) If ribs are attached to the contact surfaces of either or both of the pedestal and the pressure-releasing rubber, the joint with the pedestal becomes firmer and the reliability increases.
(5) If a substance that exhibits a function different from the pressure release function is inserted between the pedestal and the pressure release rubber, it becomes possible to prevent permeation of the substance through the valve, which is a weak point of the valve structure. It was. Also, the substance can be easily replaced when its function is reduced.
(6) With the above effect, the electric double layer capacitor packaged with an aluminum laminate film can maintain stable quality for a longer period than before.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a pressure release valve structure of an electric double layer capacitor according to Embodiment 1 of the present invention.
FIG. 2 is an explanatory view showing a pedestal, a pressure release rubber, and a pressure release valve according to Embodiment 1 of the present invention.
FIG. 3 is an explanatory view showing another example of a pedestal.
FIG. 4 is an explanatory view showing a pressure release rubber according to a second embodiment of the present invention and a pedestal according to a third embodiment of the present invention.
FIG. 5 is an explanatory diagram of a pressure release valve according to a fourth embodiment of the present invention.
FIG. 6 is a perspective view showing a pressure release valve structure of an electric double layer capacitor according to Embodiment 7 of the present invention.
FIG. 7 is an explanatory view showing a packaging method using an aluminum laminate film.
FIG. 8 is an explanatory diagram showing a packaging method of an electric double layer capacitor with an aluminum laminate film.

Claims (3)

アルミラミネートフィルムで包装された電気二重層キャパシタに放圧弁を設けた構造において、前記放圧弁として、前記アルミラミネートフィルムの内側面における溶着層と同一材料の樹脂で構成された円筒形状をなすと共に上端の周縁にリブを有し、かつ、下端の内周内側には環状部を有する台座と、該台座の該環状部の上に乗るように前記台座の内側に嵌合することにより取り付けられる放圧ゴムとの組み合わせを用い、前記アルミラミネートフィルムには前記台座と略同一径の穴を設けて、前記穴から前記放圧ゴムが露出する状態となるように前記リブを前記穴の周縁における前記溶着層に溶着することを特徴とする電気二重層キャパシタの放圧弁構造。In the structure in which a pressure release valve is provided in an electric double layer capacitor packaged with an aluminum laminate film, the pressure release valve has a cylindrical shape made of a resin of the same material as the weld layer on the inner surface of the aluminum laminate film and has an upper end. periphery to have a rib, and, on the inner periphery inside of the lower end is attached by fitting to the inside of the base to ride over the annular portion of the base and, the pedestal having an annular portion relief Using a combination with rubber, the aluminum laminate film is provided with a hole having the same diameter as the pedestal, and the rib is welded at the periphery of the hole so that the pressure-release rubber is exposed from the hole. An electric double layer capacitor pressure relief valve structure characterized by welding to a layer. 前記台座乃至放圧ゴムのどちらか又は双方の接触面にリブを付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の放圧弁構造。Relief valve structure of claim 1, wherein the electric double layer capacitor is characterized in that with a rib on the contact surface of either or both of the pedestal to the relief rubber. 前記台座と前記放圧ゴムの間の隙間空間に、放圧機能とは異なる機能を発現させる物質を挿入することを特徴とする請求項１又は２記載の電気二重層キャパシタの放圧弁構造。The pressure release valve structure for an electric double layer capacitor according to claim 1 or 2, wherein a substance that exhibits a function different from the pressure release function is inserted into a gap space between the pedestal and the pressure release rubber.
JP2002226831A 2002-08-05 2002-08-05 Relief valve structure of electric double layer capacitor Expired - Fee Related JP4356291B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002226831A JP4356291B2 (en) 2002-08-05 2002-08-05 Relief valve structure of electric double layer capacitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002226831A JP4356291B2 (en) 2002-08-05 2002-08-05 Relief valve structure of electric double layer capacitor

Publications (2)

Publication Number Publication Date
JP2004071725A JP2004071725A (en) 2004-03-04
JP4356291B2 true JP4356291B2 (en) 2009-11-04

Family

ID=32014040

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002226831A Expired - Fee Related JP4356291B2 (en) 2002-08-05 2002-08-05 Relief valve structure of electric double layer capacitor

Country Status (1)

Country Link
JP (1) JP4356291B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060037607A (en) * 2004-10-28 2006-05-03 삼성에스디아이 주식회사 Secondary battery and safety device using the same
JP4622731B2 (en) * 2005-08-10 2011-02-02 株式会社明電舎 Electric double layer capacitor protection device
WO2007062125A1 (en) * 2005-11-22 2007-05-31 Maxwell Technologies, Inc. Ultracapacitor pressure control system
WO2008111356A1 (en) * 2007-03-09 2008-09-18 Asahi Rubber Inc. Excessive pressure relief valve, and relief valve unit having the relief valve
JP2010087170A (en) * 2008-09-30 2010-04-15 Fdk Corp Electric storage device
US10586656B2 (en) 2015-10-21 2020-03-10 Nichicon Corporation Pressure valve and electrolytic capacitor

Also Published As

Publication number Publication date
JP2004071725A (en) 2004-03-04

Similar Documents

Publication Publication Date Title
JP4232038B2 (en) Film-clad electrical device and method for manufacturing the same
JP4622019B2 (en) Flat battery
JP5010467B2 (en) Film-clad electrical device and method for manufacturing the same
JP4900339B2 (en) Film-clad electrical device and method for manufacturing the same
KR101216422B1 (en) Secondary Battery Having Sealing Portion of Improved Insulating Property
JP2005203262A (en) Film jacket electric device
KR101306190B1 (en) Secondary Battery of Improved Insulating Property
JP6942080B2 (en) Power storage module
JP4235990B2 (en) Secondary battery
JP4356291B2 (en) Relief valve structure of electric double layer capacitor
JP6874852B2 (en) Power storage module
JP4069565B2 (en) Sealed battery
JP2019207780A (en) Cell, heat seal device, and manufacturing method of cell
JP2019207779A (en) Cell
JP7100538B2 (en) Power storage module
JP2008226668A (en) Battery
JPH09161759A (en) Separator
JP7226259B2 (en) battery pack
JP7100537B2 (en) Power storage module
JP2019207859A (en) Cell
JP5355281B2 (en) Electric double layer capacitor
JP2008226669A (en) Nonaqueous electrolyte battery
JP2007073322A (en) Method of sealing battery
JP2020135932A (en) Power storage module
JP2019207781A (en) Cell

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050520

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080115

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080317

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080722

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080922

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20090324

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20090409

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20090714

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20090727

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120814

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130814

Year of fee payment: 4

LAPS Cancellation because of no payment of annual fees