JPH0394410A - Electric double layer capacitor - Google Patents

Electric double layer capacitor

Info

Publication number
JPH0394410A
JPH0394410A JP1230468A JP23046889A JPH0394410A JP H0394410 A JPH0394410 A JP H0394410A JP 1230468 A JP1230468 A JP 1230468A JP 23046889 A JP23046889 A JP 23046889A JP H0394410 A JPH0394410 A JP H0394410A
Authority
JP
Japan
Prior art keywords
double layer
layer capacitor
electric double
gasket material
gasket
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
Application number
JP1230468A
Other languages
Japanese (ja)
Inventor
Hitoshi Koizumi
均 小泉
Akio Yoshida
吉田 彰夫
Mutsuo Nishimoto
西本 睦男
Tadashi Kamimura
正 上村
Eiichi Nakagawa
栄一 中川
Mitsunari Yagi
三哉 八木
Kazukimi Takayama
高山 和公
Yoriaki Niida
仁井田 頼明
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.)
Isuzu Motors Ltd
Original Assignee
Isuzu Motors Ltd
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 Isuzu Motors Ltd filed Critical Isuzu Motors Ltd
Priority to JP1230468A priority Critical patent/JPH0394410A/en
Publication of JPH0394410A publication Critical patent/JPH0394410A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/13Energy storage using capacitors

Landscapes

  • Electric Double-Layer Capacitors Or The Like (AREA)

Abstract

PURPOSE:To enhance a pressurization efficiency by a method wherein a gasket is formed by a hardening and molding operation so as to be thinner than a thickness of a polarizing electrode which has been filled with a liquid gasket material of a room-temperature hardening type. CONSTITUTION:A recessed part 8 surrounded by a liquid gasket material 60 with which a collector 1 has been coated is filled with a paste-like polarizing electrode 4. Then, a separator 3 is placed on the filled polarizing electrode 4. While the separator is pressed by using rollers 9 and is being degassed, the separator 3 is bonded. Since the liquid gasket material 60 is compressed and molded at this time, the liquid gasket material 60 of a room-temperature hardening type is compressed and hardened to form a gasket 6. A distance in an up-and-down direction between collectors 1, 2 at parts of gaskets 6, 7 is smaller than that in other parts 6, 7. Thereby, when an electric double layer capacitor is pressurized during its use, a pressurization force is used exclusively to compress polarizing electrodes 4, 5 and an efficient pressurization operation can be executed.

Description

【発明の詳細な説明】[Detailed description of the invention] 【産業上の利用分野】[Industrial application field]

本発明は、分極性電極を有効に加圧することができるよ
うにした電気二重層コンデンサに関するものである.
The present invention relates to an electric double layer capacitor that can effectively pressurize polarizable electrodes.

【従来の技術1 第6図に、従来の電気二重層コンデンサを示す.第6図
において、1.2は集電体、3はセバレー夕、4.5は
分極性電極、12.13はガスケットである. 集電体1,2としては、導電性のゴムが用いられる.分
極性電極4.5は、活性炭粉末を電解質液(例、希硫酸
)と混合してペースト状にしたものである.ガスケット
12.13は、分極性電極4,5を周囲から絶縁するた
めのものであり、絶縁性のゴムが用いられる.セバレー
タ3は、分極性電極4.5間の導通を阻止するためのも
のである.しかし、イオンを透過する必要があるので、
分極性電極の活性炭粉末は通過させないがイオンは通過
させる孔が開いているところの多孔質性の材料が使用さ
れる.例えば、多孔質性のプラスチック製フィルム(ポ
リプロピレン)が用いられる.このような構威の電気二
重層コンデンサでは、分極性電極4.5に含まれる活性
炭粉末同士の接触抵抗,活性炭粉末と集電体1.2との
接触抵抗があり、これらが内部抵抗を呈している.t気
二重層コンデンサを使用する際には、内部抵抗が小であ
ることが望ましいので、集電体1.2の上から加圧して
接触を良くし、上記接触抵抗を小にすることが行われる
。 本発明は、このような問題点を解決することを課題とす
るものである。 【発明が解決しようとする課題】 (問題点) しかしながら、前記した従来の電気二重層コンデンサに
は、加圧力が有効に生かされないという問題点があった
。 (問題点の説明) 集電体1.2の上から加圧して、前記した接触抵抗を小
にするためには、分極性電極4.5を圧縮しなければな
らないが、そのためには、ガスヶット12.13も同時
に圧縮しなければならない.ところが、ガスケット12
.13を圧縮しようとすると大きな反力を受けるので、
加圧力としては、大きな力を必要とする.従って、加え
る圧力の相当大きな部分がガスケット12.13を圧縮
するのに費やされてしまい、肝心の分極性電極4,5を
圧縮するのに使われる分が減ってしまっていた。つまり
、加圧が効率よく行われなかった.
[Conventional technology 1] Figure 6 shows a conventional electric double layer capacitor. In Fig. 6, 1.2 is a current collector, 3 is a separator, 4.5 is a polarizable electrode, and 12.13 is a gasket. As the current collectors 1 and 2, conductive rubber is used. The polarizable electrode 4.5 is made by mixing activated carbon powder with an electrolyte solution (eg, dilute sulfuric acid) to form a paste. The gaskets 12 and 13 are for insulating the polarizable electrodes 4 and 5 from the surroundings, and are made of insulating rubber. The separator 3 is for preventing conduction between the polarizable electrodes 4.5. However, since it is necessary to transmit ions,
A porous material is used that has pores that do not allow the activated carbon powder of the polarizable electrode to pass through, but allow ions to pass through. For example, a porous plastic film (polypropylene) is used. In an electric double layer capacitor with such a structure, there is a contact resistance between the activated carbon powder contained in the polarizable electrode 4.5 and a contact resistance between the activated carbon powder and the current collector 1.2, and these exhibit internal resistance. ing. When using a gas double layer capacitor, it is desirable that the internal resistance is low, so it is possible to apply pressure from above the current collector 1.2 to improve contact and reduce the contact resistance. be exposed. The present invention aims to solve these problems. Problems to be Solved by the Invention (Problems) However, the conventional electric double layer capacitor described above has a problem in that the pressurizing force is not effectively utilized. (Explanation of the problem) In order to apply pressure from above the current collector 1.2 to reduce the contact resistance mentioned above, the polarizable electrode 4.5 must be compressed. 12.13 must also be compressed at the same time. However, gasket 12
.. If you try to compress 13, you will receive a large reaction force, so
A large amount of pressure is required. Therefore, a considerable portion of the applied pressure is spent compressing the gaskets 12, 13, and less is used to compress the essential polarizable electrodes 4, 5. In other words, pressurization was not performed efficiently.

【課題を解決するための手段】[Means to solve the problem]

前記課題を解決するため、本発明の電気二重層コンデン
サでは、常温硬化型の液状ガスケット材を、充填された
分極性電極の厚みより薄くなるよう硬化成形してガスケ
ットとすることとした.
In order to solve the above problem, in the electric double layer capacitor of the present invention, a room temperature curing liquid gasket material is hardened and molded to be made thinner than the thickness of the filled polarizable electrode to form a gasket.

【作  用1 前記のようにしてガスケットを戒形すると、上下2つの
集電体の部分のうちガスケットに接着された部分の上下
間距離は、分極性電極に接触している部分の上下間距離
より小となる. そのため、電気二重層コンデンサを加圧する際、加圧力
の大部分は分極性電極を圧縮するのに使われ、ガスケッ
トを圧縮するのには殆んど使われない.従って、加圧は
効率よく行われる.【実 施 例】 以下、本発明の実施例を図面に基づいて詳細に説明する
。 第1図に、本発明の実施例にかかわる電気二重層コンデ
ンサを示す。符号は、第6図に対応している。そして、
6.7はガスケットである.構或上、従来例と異なる点
は、ガスゲットとして、当初から固体の絶縁性ゴムを用
いるのではなく、当初は液状であるが、やがて常温で硬
化する常温硬化型の液状ガスケット材を用いた点である
.第2図は、集電体の周辺部に液状ガスケット材を塗布
した状態を示し、第3図,第4図は、本発明の電気二重
層コンデンサの製造工程を示している.以下、これらの
図に従い、本発明の電気二重層コンデンサの製造の仕方
を説明する.■ まず、第2図に示すように、集電体l
に液状ガスケット材604−塗布する.液状ガスケット
材60に囲まれて凹部8が出来る.凹部8に、ペースト
状の分極性電極4を充填する.■ 次に、第3図に示す
ように、充填した分極性電極4の上にセパレータ3を置
き、ローラー9で押さえて脱気(空気を抜くこと)しな
がらセパレータ3を接着する. この時、液状ガスケット材60を圧縮して戒形する.液
状ガスケット材60は、常温硬化型であるから、圧縮さ
れた形で硬化してガスケット6となる. ■ セバレータ3の周辺部に液状ガスケット材70を塗
布し、液状ガスケット材70で囲まれて出来た凹部に分
極性電極5を充填する.そして、第4図に示すように、
その上に集電体2を置き、やはりローラー9で脱気しな
から集電体2を接着する.液状ガスケット材70も圧縮
された形で硬化してガスケット7となる. 以上のようにして製造するから、第4図あるいは第1図
に示すように、集電体1.2間の上下方向の距離は、ガ
スケット6.7の部分では他の部分におけるよりも小と
なる.即ち、集電体1,2の部分のうちガスケット6,
7と接着されている部分は、他の部分よりも沈む. そのため、電気二重層コンデンサの使用時に加圧する際
、沈んでいるガスケット6.7からは反力を受けないか
ら、加圧力は専ら分極性電極4.5を圧縮するのに使わ
れる.従って、効率のよい加圧をすることが出来る. なお、第3図,第4図の工程を次々と重ねて行けば、積
層した電気二重層コンデンサを得ることが出来る. さて、前記したように、加圧は接触抵抗を小にするため
に行われるが、ガスケットの改良を行うほか、集電体1
,2に使用する材料を変えれば、接触抵抗を更に小とす
ることが出来る.上例の集電体1.2の材料としては、
従来と同じく導電性のゴムを使用していたが、その代わ
りに炭素繊維ペーパーを使用すると、集電体と分極性電
極(厳密に言うならば、その中に含まれている活性炭粉
末)との接触抵抗を、更に小にすることが出来る. 第5図に、集電体の材料として炭素繊維ペーパーを用い
た場合の活性炭粉末との接触状態を示す.第5図におい
て、IOは炭素繊維ペーパー、10−1はヒゲ状繊維、
l1は分極性電極に含まれる活性炭粉末である. 炭素繊維ペーパー10の表面からは、無数のヒゲ状繊維
10−1が出ている。そのため、炭素繊維ペーパー10
が分極性電極4(5)と接触させられると、各ヒゲ状繊
維1 0−1は多数の活性炭粉末11と接触する.この
ことは、集電体と分極性電極との接触面積が、大になっ
たことに他ならない.接触面積が大になると、接触抵抗
は小となる. なお、分極性電極に含浸されている電解賞液(例、希硫
酸)が、炭素繊維ペーパーから浸み出る恐れがあるとい
う場合には、炭素繊維ペーパーの分極性電極と接触しな
い側の面に導電性樹脂をコーティングすればよい.
[Effect 1] When the gasket is shaped as described above, the distance between the upper and lower parts of the upper and lower current collector parts that are glued to the gasket is equal to the distance between the upper and lower parts of the part that is in contact with the polarizable electrode. It becomes smaller. Therefore, when pressurizing an electric double layer capacitor, most of the pressurizing force is used to compress the polarizable electrode, and very little is used to compress the gasket. Therefore, pressurization is performed efficiently. [Embodiments] Hereinafter, embodiments of the present invention will be described in detail based on the drawings. FIG. 1 shows an electric double layer capacitor according to an embodiment of the present invention. The symbols correspond to those in FIG. and,
6.7 is a gasket. The difference in structure from conventional examples is that instead of using solid insulating rubber as the gas get from the beginning, we used a room temperature liquid gasket material that is initially liquid but then hardens at room temperature. It is a point. FIG. 2 shows the state in which the liquid gasket material is applied to the periphery of the current collector, and FIGS. 3 and 4 show the manufacturing process of the electric double layer capacitor of the present invention. The method of manufacturing the electric double layer capacitor of the present invention will be explained below with reference to these figures. ■ First, as shown in Figure 2, the current collector l
Apply liquid gasket material 604 to. A recess 8 is formed surrounded by the liquid gasket material 60. The recess 8 is filled with a paste-like polarizable electrode 4. (2) Next, as shown in FIG. 3, the separator 3 is placed on top of the filled polarizable electrode 4, and the separator 3 is adhered while being pressed with a roller 9 to deaerate (remove air). At this time, the liquid gasket material 60 is compressed and shaped. Since the liquid gasket material 60 is a room temperature curing type, it hardens in a compressed form to form the gasket 6. (2) Apply a liquid gasket material 70 to the peripheral area of the separator 3, and fill the polarizable electrode 5 into the recess formed by the liquid gasket material 70. And, as shown in Figure 4,
The current collector 2 is placed on top of it, and the current collector 2 is adhered after degassing with the roller 9. The liquid gasket material 70 also hardens in a compressed form to become the gasket 7. Since it is manufactured as described above, the distance between the current collectors 1.2 in the vertical direction is smaller in the gasket 6.7 part than in other parts, as shown in FIG. 4 or FIG. Become. That is, among the parts of the current collectors 1 and 2, the gasket 6,
The part that is glued to 7 sinks more than the other parts. Therefore, when applying pressure when using an electric double layer capacitor, no reaction force is received from the sunken gasket 6.7, so the applied force is used exclusively to compress the polarizable electrode 4.5. Therefore, efficient pressurization can be performed. Note that by repeating the steps shown in Figures 3 and 4 one after another, a laminated electric double layer capacitor can be obtained. Now, as mentioned above, pressurization is performed to reduce contact resistance, but in addition to improving the gasket,
By changing the materials used for , 2, the contact resistance can be further reduced. The material for the current collector 1.2 in the above example is as follows:
As in the past, conductive rubber was used, but when carbon fiber paper was used instead, the interaction between the current collector and the polarizable electrode (more precisely, the activated carbon powder contained therein) was improved. Contact resistance can be further reduced. Figure 5 shows the state of contact with activated carbon powder when carbon fiber paper is used as the current collector material. In FIG. 5, IO is carbon fiber paper, 10-1 is whisker-like fiber,
l1 is activated carbon powder contained in the polarizable electrode. Numerous whisker-like fibers 10-1 come out from the surface of the carbon fiber paper 10. Therefore, carbon fiber paper 10
When brought into contact with the polarizable electrode 4 (5), each whisker-like fiber 10-1 comes into contact with a large number of activated carbon powders 11. This is nothing but an increase in the contact area between the current collector and the polarizable electrode. As the contact area increases, the contact resistance decreases. In addition, if there is a risk that the electrolytic liquid (e.g. dilute sulfuric acid) impregnated into the polarizable electrode may seep out from the carbon fiber paper, apply it to the side of the carbon fiber paper that does not come into contact with the polarizable electrode. All you need to do is coat it with conductive resin.

【発明の効果】【Effect of the invention】

以上述べた如く、本発明の電気二重層コンデンサによれ
ば、充填された分極性電極の厚みより薄くなるようガス
ケットが戒形されているので、接触抵抗を小にするため
加圧する際、加圧力の殆んどは分極性電極を圧縮するの
に使われ、ガスケットを圧縮するのに使われることがな
い.従って、加圧が効率よく行われるようになった.
As described above, according to the electric double layer capacitor of the present invention, the gasket is shaped to be thinner than the thickness of the filled polarizable electrodes, so when applying pressure to reduce contact resistance, the pressure Most of this is used to compress the polarizable electrode and not the gasket. Therefore, pressurization can now be performed efficiently.

【図面の簡単な説明】[Brief explanation of drawings]

第1図・・・本発明の実施例にかかわる電気二重層コン
デンサ 第2図・・・集電体の周辺部に液状ガスケット材を塗布
した状態を示す図 第3図,第4図・・・本発明の電気二重層コンデンサの
製造工程を示す図 第5図・・・集電体の材料として炭素繊維ペーパーを用
いた場合の活性炭粉末との接触状態を示す図 第6図・・・従来の電気二重層コンデンサ図において、
1,2は集電体、3はセバレータ、4,5は分極性電極
、6,7はガスケット、8は凹部、9はローラー、10
は炭素繊維ペーパーl1は活性炭粉末、12.13はガ
スケット、60,70は液状ガスケット材である。
Fig. 1: Electric double layer capacitor according to an embodiment of the present invention Fig. 2: A diagram showing a state in which liquid gasket material is applied to the periphery of the current collector Figs. 3 and 4... Figure 5 shows the manufacturing process of the electric double layer capacitor of the present invention. Figure 6 shows the state of contact with activated carbon powder when carbon fiber paper is used as the current collector material. In the electric double layer capacitor diagram,
1 and 2 are current collectors, 3 is a separator, 4 and 5 are polarizable electrodes, 6 and 7 are gaskets, 8 is a recess, 9 is a roller, 10
The carbon fiber paper l1 is activated carbon powder, 12.13 is a gasket, and 60 and 70 are liquid gasket materials.

Claims (1)

【特許請求の範囲】[Claims] 常温硬化型の液状ガスケット材を、充填された分極性電
極の厚みより薄くなるよう硬化成形してガスケットとし
たことを特徴とする電気二重層コンデンサ。
An electric double layer capacitor characterized in that a gasket is made by curing and molding a liquid gasket material that hardens at room temperature so that it is thinner than the thickness of the polarizable electrodes filled therein.
JP1230468A 1989-09-07 1989-09-07 Electric double layer capacitor Pending JPH0394410A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1230468A JPH0394410A (en) 1989-09-07 1989-09-07 Electric double layer capacitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1230468A JPH0394410A (en) 1989-09-07 1989-09-07 Electric double layer capacitor

Publications (1)

Publication Number Publication Date
JPH0394410A true JPH0394410A (en) 1991-04-19

Family

ID=16908300

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1230468A Pending JPH0394410A (en) 1989-09-07 1989-09-07 Electric double layer capacitor

Country Status (1)

Country Link
JP (1) JPH0394410A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090201629A1 (en) * 2005-07-27 2009-08-13 Cellergy Ltd. Multilayered Electrochemical Energy Storage Device and Method of Manufacture Thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090201629A1 (en) * 2005-07-27 2009-08-13 Cellergy Ltd. Multilayered Electrochemical Energy Storage Device and Method of Manufacture Thereof
US8472162B2 (en) * 2005-07-27 2013-06-25 Cellergy Ltd. Multilayered electrochemical energy storage device and method of manufacture thereof

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