JPH05101978A - Electric double layer capacitor - Google Patents
Electric double layer capacitorInfo
- Publication number
- JPH05101978A JPH05101978A JP3287127A JP28712791A JPH05101978A JP H05101978 A JPH05101978 A JP H05101978A JP 3287127 A JP3287127 A JP 3287127A JP 28712791 A JP28712791 A JP 28712791A JP H05101978 A JPH05101978 A JP H05101978A
- Authority
- JP
- Japan
- Prior art keywords
- electric double
- double layer
- layer capacitor
- plate
- electrode plate
- 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
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、集電電極板を改良した
電気二重層コンデンサ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 having an improved collector electrode plate.
【０００２】[0002]
【従来の技術】図７は、従来の電気二重層コンデンサの
断面図である。図において、１はコンデンサ本体部、３
は外部電流端子、１０，１１は集電電極板、１２，１３
は圧縮板、１４は絶縁ケース、１５は外装ケース、１６
は絶縁スリーブ、１７は基本セルである。2. Description of the Related Art FIG. 7 is a sectional view of a conventional electric double layer capacitor. In the figure, 1 is a capacitor main body, 3
Is an external current terminal, 10 and 11 are collector electrode plates, and 12 and 13
Is a compression plate, 14 is an insulating case, 15 is an outer case, 16
Is an insulating sleeve, and 17 is a basic cell.
【０００３】コンデンサ本体部１は、多数の基本セル１
７を積層したものである。コンデンサ本体部１の一方の
端面は、圧縮板１２、金属製の外装ケース１５、集電電
極板１１及び外部電流端子３を介して外部に接続され
る。また、コンデンサ本体部１の他方の端面は、圧縮板
１３、集電電極板１０及び外部電流端子３を介して外部
に接続される。集電電極板１０と集電電極板１１との
間、及びコンデンサ本体部１，集電電極板１０，圧縮板
１３等と外装ケース１５との間は、絶縁ケース１４によ
って絶縁が確保されている。そして、外装ケース１５の
外側は、絶縁スリーブ１６によって絶縁されている。The capacitor body 1 comprises a large number of basic cells 1.
7 is laminated. One end surface of the capacitor body 1 is connected to the outside via the compression plate 12, the metal outer case 15, the collector electrode plate 11 and the external current terminal 3. The other end surface of the capacitor body 1 is connected to the outside via the compression plate 13, the collector electrode plate 10 and the external current terminal 3. Insulation is secured between the current collecting electrode plate 10 and the current collecting electrode plate 11 and between the capacitor body 1, the current collecting electrode plate 10, the compression plate 13 and the outer case 15 by the insulating case 14. .. The outer side of the outer case 15 is insulated by the insulating sleeve 16.
【０００４】図８は、従来の電気二重層コンデンサの基
本セルの断面図である。図において、１８は分極性電
極、１９は集電体、２０はセパレータ、２１はガスケッ
トである。分極性電極１８は、活性炭粉末と電解質溶液
（例、希硫酸）とを混合したペースト状の電極であり、
非導電性で多孔性のセパレータ２０を挟んでその両側に
封入される。そして、電極１８の上下は導電性弾性体よ
り成る集電体１９で覆われ、外周は非導電性のガスケッ
ト２１で囲まれている。このような構成の電気二重層コ
ンデンサの基本セルにおいては、分極性電極となる活性
炭粉末と電解質溶液との界面にできる電気二重層によっ
て大きな静電容量が形成される。FIG. 8 is a sectional view of a basic cell of a conventional electric double layer capacitor. In the figure, 18 is a polarizable electrode, 19 is a current collector, 20 is a separator, and 21 is a gasket. The polarizable electrode 18 is a paste-like electrode in which activated carbon powder and an electrolyte solution (eg, dilute sulfuric acid) are mixed,
A non-conductive and porous separator 20 is sandwiched and sealed on both sides thereof. The upper and lower sides of the electrode 18 are covered with a current collector 19 made of a conductive elastic body, and the outer circumference is surrounded by a non-conductive gasket 21. In the basic cell of the electric double layer capacitor having such a structure, a large electrostatic capacitance is formed by the electric double layer formed at the interface between the activated carbon powder that serves as the polarizable electrode and the electrolyte solution.
【０００５】ところで、上記のような構成の基本セルを
いくつか積層してコンデンサ本体部を構成した場合の内
部抵抗は、隣接する基本セル１７間の接触抵抗、及び各
基本セル１７内での活性炭粉末間の接触抵抗等から成
る。したがって、コンデンサの内部抵抗を小さくするた
めには、積層体の両端面間に大きな圧力を加えて接触を
良好にする必要があった。そのため、従来の電気二重層
コンデンサでは、例えば図７に示されるように、外装ケ
ース１５のカシメによる力を利用して、圧縮板１２，１
３を介してコンデンサ本体部１に１０〜３０Ｋｇ／ｃｍ
2 の大きな圧力を加える構造としていた。By the way, the internal resistance in the case where a capacitor body is formed by laminating a plurality of basic cells having the above-mentioned structure, the internal resistance is the contact resistance between adjacent basic cells 17 and the activated carbon in each basic cell 17. It consists of contact resistance between powders. Therefore, in order to reduce the internal resistance of the capacitor, it was necessary to apply a large pressure between both end faces of the laminate to improve the contact. Therefore, in the conventional electric double layer capacitor, for example, as shown in FIG. 7, the compression plates 12, 1
10 to 30 kg / cm in the capacitor body 1 via
It was structured to apply a large pressure of 2 .
【０００６】そのため、圧縮板１２，１３及び集電電極
板１０，１１は、１０〜３０Ｋｇ／ｃｍ2 の圧力を加え
ても変形等しないように、板厚を厚くしなければなら
ず、その分重量が大きくなってしまうという問題があっ
た。Therefore, the compression plates 12 and 13 and the current collecting electrode plates 10 and 11 must be thickened so as not to be deformed even when a pressure of 10 to 30 kg / cm 2 is applied. There was a problem that the weight would increase.
【０００７】一方、最近分極性電極として、活性炭粉末
の代わりに固形活性炭を用いた電気二重層コンデンサが
開発され、特開平３─７８２２１号として公開されてい
る。その電気二重層コンデンサは、活性炭微粒子からな
る粉体に圧力をかけた状態のままパルス状電圧を印加し
て、各微粒子間に放電を発生させると共に７００〜１０
００°Ｃの高温に保持して、活性炭微粒子相互間を焼結
結合させた多孔質焼結体を分極性電極としたものであ
る。その多孔質焼結体に電解質溶液を含浸させて電気二
重層を形成する。そのような固形の分極性電極を有する
基本セルを積層し、その両端に引き出し端子付きの金属
製集電電極板を当接して、外部との接続を行っていた。On the other hand, recently, as a polarizable electrode, an electric double layer capacitor using solid activated carbon in place of activated carbon powder has been developed and is disclosed as Japanese Patent Laid-Open No. 3-78221. The electric double layer capacitor applies a pulsed voltage to a powder consisting of activated carbon fine particles while applying a pressure to generate a discharge between the fine particles and 700 to 10
A polarizable electrode is obtained by maintaining a high temperature of 00 ° C. and sintering-bonding the activated carbon fine particles to each other. The porous sintered body is impregnated with an electrolyte solution to form an electric double layer. Basic cells having such solid polarizable electrodes are stacked, and metal collector electrode plates with lead-out terminals are brought into contact with both ends of the basic cells to connect to the outside.
【０００８】この電気二重層コンデンサでは、活性炭粉
末と電解質溶液とを混合したいわゆるペースト状電極は
用いないので、活性炭粉末相互間の接触抵抗を下げるた
めの圧力印加は不要となる。しかし、コンデンサ本体部
と集電電極板との接触抵抗を下げるため、ある程度の圧
力印加は必要である。それに必要な圧力は１Ｋｇ／ｃｍ
2 程度であるが、その程度の圧力印加なら、コンデンサ
本体部に当接される集電電極板は、あまり厚みがなくて
も変形する恐れはないので、厚さを薄くでき、その重量
を減らすことができる。さらに、図７のものにおいて用
いられているような圧縮板１２，１３は不要となるの
で、コンデンサ全体の重量をより一層減らすことができ
る。In this electric double layer capacitor, a so-called paste-like electrode in which activated carbon powder and an electrolyte solution are mixed is not used, so that it is not necessary to apply pressure to reduce the contact resistance between the activated carbon powders. However, it is necessary to apply a certain amount of pressure in order to reduce the contact resistance between the capacitor body and the collector electrode plate. The pressure required for that is 1 kg / cm
Although it is about 2 , if the pressure is applied to that level, the collector electrode plate that contacts the capacitor body will not be deformed even if it is not very thick, so the thickness can be made thinner and its weight reduced. be able to. Further, since the compression plates 12 and 13 used in the one shown in FIG. 7 are unnecessary, the weight of the entire capacitor can be further reduced.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、集電電
極板に金属板を使っている以上、重量の低減には限度が
あり、充分な重量の低減はできなかった。本発明は、そ
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。However, since the metal plate is used as the collector electrode plate, there is a limit to the weight reduction, and the weight cannot be sufficiently reduced. An object of the present invention is to solve such a problem.
【００１０】[0010]
【課題を解決するための手段】前記課題を解決するた
め、本発明では、基本セルの分極性電極として固形活性
炭を用いた電気二重層コンデンサにおいて、集電電極板
として樹脂板の表面に金属箔の層を形成した積層板を用
いることとした。In order to solve the above problems, according to the present invention, in an electric double layer capacitor using solid activated carbon as a polarizable electrode of a basic cell, a metal foil is formed on a surface of a resin plate as a collecting electrode plate. It was decided to use a laminated plate on which the layers of
【００１１】[0011]
【作 用】集電電極板の主材料として樹脂を用いるの
で、金属板を用いた場合と比較して、重量をかなり軽く
できる。樹脂の表面には金属箔の層を形成したので、充
分な導電性が得られ、集電電極板としての機能を充分果
たすことができる。なお、基本セルに分極性電極として
固形活性炭を用いた電気二重層コンデンサでは、コンデ
ンサ本体部に印加する圧力は小さくてもよいので、集電
電極板の主材料を樹脂としたとしても、その圧力に充分
耐えることができる。[Operation] Since resin is used as the main material of the collector electrode plate, the weight can be considerably reduced compared to the case where a metal plate is used. Since the metal foil layer is formed on the surface of the resin, sufficient conductivity can be obtained and the function as the collector electrode plate can be sufficiently fulfilled. In an electric double layer capacitor using solid activated carbon as a polarizable electrode in the basic cell, the pressure applied to the capacitor body may be small, so even if the main material of the collector electrode plate is resin, that pressure Can withstand enough.
【００１２】[0012]
【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。図１は、本発明の電気二重層コンデンサの
断面図であり、図２は、本発明の電気二重層コンデンサ
の外観図である。これらの図において、符号は図７のも
のに対応し、２は集電電極板、２─１は樹脂板、２─２
は金属箔、４は上蓋、５は底板、６，７は側板である。
集電電極板２は、金属箔２─２の方を内側にして、両側
から１Ｋｇ／ｃｍ2 程度の圧力でコンデンサ本体部１の
両端面に押し付けられている。また、コンデンサ本体部
１の周囲は上蓋４、底板５、及び側板６，７で覆われて
おり、コンデンサ本体部１の両端に位置する基本セルの
集電体の内、外側の集電体は、金属箔２─２及び外部電
流端子３を経て外部に接続される。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a sectional view of the electric double layer capacitor of the present invention, and FIG. 2 is an external view of the electric double layer capacitor of the present invention. In these figures, the reference numerals correspond to those in FIG. 7, 2 is a collector electrode plate, 2-1 is a resin plate, 2-2
Is a metal foil, 4 is a top cover, 5 is a bottom plate, and 6 and 7 are side plates.
The collector electrode plate 2 is pressed against both end faces of the capacitor body 1 with pressure of about 1 kg / cm 2 from both sides with the metal foil 2-2 inside. In addition, the periphery of the capacitor body 1 is covered with a top cover 4, a bottom plate 5, and side plates 6 and 7, and among the current collectors of the basic cells located at both ends of the capacitor body 1, the outer current collectors are , The metal foil 2-2 and the external current terminal 3 are connected to the outside.
【００１３】図３は、本発明の電気二重層コンデンサに
用いられる集電電極板の第１実施例の構造図であり、図
４は、その断面図である。符号は図１のものに対応し、
８はかしめ部である。金属箔２─２は、印刷等の手段に
より、樹脂板２─１の表面に積層されている。また、外
部電流端子３は、金属箔２─２と密着した状態で樹脂板
２─１の中にモールドされており、かつ、かしめ部８で
金属箔２─２と固着されている。この第１実施例では、
外部電流端子３が集電電極板２の端面方向に引き出され
るように設けられている。FIG. 3 is a structural view of a first embodiment of a collector electrode plate used in the electric double layer capacitor of the present invention, and FIG. 4 is a sectional view thereof. The reference numerals correspond to those in FIG. 1,
8 is a caulking part. The metal foil 2-2 is laminated on the surface of the resin plate 2-1 by means such as printing. The external current terminal 3 is molded in the resin plate 2-1 in a state of being in close contact with the metal foil 2-2, and is fixed to the metal foil 2-2 by the caulking portion 8. In this first embodiment,
The external current terminal 3 is provided so as to be drawn out toward the end surface of the collector electrode plate 2.
【００１４】図５は、本発明の電気二重層コンデンサに
用いられる集電電極板の第２実施例の構造図であり、図
６は、その断面図である。符号は図３のものに対応して
いる。この第２実施例では、外部電流端子３が集電電極
板２の側面方向に引き出されるように設けられている。FIG. 5 is a structural view of a second embodiment of a collector electrode plate used in the electric double layer capacitor of the present invention, and FIG. 6 is a sectional view thereof. The reference numerals correspond to those in FIG. In the second embodiment, the external current terminal 3 is provided so as to be drawn out in the side surface direction of the collector electrode plate 2.
【００１５】なお、上記各実施例では、樹脂板２─１に
金属箔２─２の層を形成するのに、印刷によって行う例
を示したが、それに限らず、金属箔の接着やメッキ等金
属層を形成しうる手段ならば他の手段を使うこともでき
る。また、金属箔２─２と外部電流端子３との固着をか
しめにより行った例を示したが、それに限らず、半田付
け等の固着手段を使うこともできる。In each of the above-described embodiments, an example in which the layer of the metal foil 2-2 is formed on the resin plate 2-1 by printing has been shown, but the invention is not limited to this, and the metal foil may be adhered or plated. Other means can be used as long as they can form a metal layer. Further, although the example in which the metal foil 2-2 and the external current terminal 3 are fixed to each other by caulking is shown, the present invention is not limited to this, and fixing means such as soldering can be used.
【００１６】[0016]
【発明の効果】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、集電電極板の主材料として樹脂を用
いたので、金属板を用いた場合と比較して、重量をかな
り軽くすることができる。そして、樹脂の表面には、金
属箔の層を形成したので充分な導電性が得られ、集電電
極板としての機能を充分果たすことができる。基本セル
に分極性電極として固形活性炭を用いた電気二重層コン
デンサでは、コンデンサ本体部に印加する圧力は小さく
てもよいので、集電電極板の主材料を樹脂としたとして
も、その圧力に充分耐えることができる。As described above, according to the electric double layer capacitor of the present invention, since the resin is used as the main material of the collector electrode plate, the weight is considerably reduced as compared with the case of using the metal plate. can do. Further, since the metal foil layer is formed on the surface of the resin, sufficient conductivity can be obtained, and the function as the collector electrode plate can be sufficiently fulfilled. In an electric double layer capacitor that uses solid activated carbon as a polarizable electrode in the basic cell, the pressure applied to the capacitor body may be small, so even if the main material of the collector electrode plate is resin, the pressure is sufficient. Can bear.
【図１】 本発明の電気二重層コンデンサの断面図FIG. 1 is a sectional view of an electric double layer capacitor of the present invention.
【図２】 本発明の電気二重層コンデンサの外観図FIG. 2 is an external view of an electric double layer capacitor of the present invention.
【図３】 本発明の電気二重層コンデンサに用いられる
集電電極板の第１実施例の構造図FIG. 3 is a structural diagram of a first embodiment of a collector electrode plate used in the electric double layer capacitor of the present invention.
【図４】 本発明の電気二重層コンデンサに用いられる
集電電極板の第１実施例の断面図FIG. 4 is a sectional view of a first embodiment of a collector electrode plate used in the electric double layer capacitor of the present invention.
【図５】 本発明の電気二重層コンデンサに用いられる
集電電極板の第２実施例の構造図FIG. 5 is a structural diagram of a second embodiment of a collector electrode plate used in the electric double layer capacitor of the present invention.
【図６】 本発明の電気二重層コンデンサに用いられる
集電電極板の第２実施例の断面図FIG. 6 is a sectional view of a second embodiment of a collector electrode plate used in the electric double layer capacitor of the present invention.
【図７】 従来の電気二重層コンデンサの断面図FIG. 7 is a sectional view of a conventional electric double layer capacitor.
【図８】 従来の電気二重層コンデンサの基本セルの断
面図FIG. 8 is a sectional view of a basic cell of a conventional electric double layer capacitor.
１…コンデンサ本体部 ２…集電電極板 ２─１…樹脂板 ２─２…金属箔 ３…外部電流端子 ４…上蓋 ５…底板 ６，７…側板 ８…かしめ部 １０，１１…集電電極板 １２，１３…圧縮板 １４…絶縁ケース １５…外装ケース １６…絶縁スリーブ １７…基本セル １８…分極性電極 １９…集電体 ２０…セパレータ ２１…ガスケット 1 ... Capacitor main body 2 ... Current collecting electrode plate 2-1 ... Resin plate 2-2 ... Metal foil 3 ... External current terminal 4 ... Top lid 5 ... Bottom plate 6, 7 ... Side plate 8 ... Crimping part 10, 11 ... Current collecting electrode Plates 12, 13 ... Compression plate 14 ... Insulation case 15 ... Exterior case 16 ... Insulation sleeve 17 ... Basic cell 18 ... Polarizable electrode 19 ... Current collector 20 ... Separator 21 ... Gasket
Claims (1)
を用いた電気二重層コンデンサにおいて、集電電極板と
して樹脂板の表面に金属箔の層を形成した積層板を用い
たことを特徴とする電気二重層コンデンサ。1. An electric double layer capacitor using solid activated carbon as a polarizable electrode of a basic cell, wherein a laminated plate having a metal foil layer formed on a surface of a resin plate is used as a collector electrode plate. Electric double layer capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3287127A JPH05101978A (en) | 1991-10-07 | 1991-10-07 | Electric double layer capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3287127A JPH05101978A (en) | 1991-10-07 | 1991-10-07 | Electric double layer capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05101978A true JPH05101978A (en) | 1993-04-23 |
Family
ID=17713425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3287127A Pending JPH05101978A (en) | 1991-10-07 | 1991-10-07 | Electric double layer capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05101978A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008050510A1 (en) * | 2006-09-29 | 2008-05-02 | Mitsubishi Gas Chemical Company, Inc. | Electrochemical capacitor module |
-
1991
- 1991-10-07 JP JP3287127A patent/JPH05101978A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008050510A1 (en) * | 2006-09-29 | 2008-05-02 | Mitsubishi Gas Chemical Company, Inc. | Electrochemical capacitor module |
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