JP2564927B2 - Electric double layer capacitor and manufacturing method thereof - Google Patents
Electric double layer capacitor and manufacturing method thereofInfo
- Publication number
- JP2564927B2 JP2564927B2 JP1006308A JP630889A JP2564927B2 JP 2564927 B2 JP2564927 B2 JP 2564927B2 JP 1006308 A JP1006308 A JP 1006308A JP 630889 A JP630889 A JP 630889A JP 2564927 B2 JP2564927 B2 JP 2564927B2
- Authority
- JP
- Japan
- Prior art keywords
- electric double
- double layer
- layer capacitor
- conductive
- separator
- 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 - Lifetime
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
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は電気二重層コンデンサに関し、特に接触抵抗
を低減させた電気二重層コンデンサに関する。TECHNICAL FIELD The present invention relates to an electric double layer capacitor, and more particularly to an electric double layer capacitor with reduced contact resistance.
電気二重層現象を利用して大容量コンデンサを得る手
段の一つとして米国特許第3536963号明細書に開示され
ているように、カーボン粉末と電解液とを接触させて電
気二重層を発生させることを利用したものがある。As disclosed in U.S. Pat. No. 3,536,963, one of the means for obtaining a large-capacity capacitor by utilizing the electric double layer phenomenon is to bring an electric double layer into contact with carbon powder and an electrolytic solution. There is one that uses.
第４図は従来の電気二重層コンデンサ素子（以下素子
と称す）の断面図である。FIG. 4 is a cross-sectional view of a conventional electric double layer capacitor element (hereinafter referred to as an element).
第４図において、11は電子伝導性でかつイオン不浸透
性の導電性セパレータ、12は粉末活性炭と電解質溶液か
らなるペースト電極、13はペースト電極12−12間の導通
を防止するために設けたイオン透過性で、かつ非電子伝
導性を有する多孔性セパレータ、14はペースト電極を保
持し、かつ外界から遮断するために設けた非導電性ガス
ケットである。この素子は、リング状に打抜いた非導電
性ガスケットと導電性セパレータを貼り合せてできた凹
部にペースト電極をドクターナイフ工法等で充填した２
枚のシートを、多孔性セパレータを介して貼合わせ、加
硫接着して得られる。In FIG. 4, 11 is an electrically conductive and ion-impermeable conductive separator, 12 is a paste electrode composed of powdered activated carbon and an electrolyte solution, and 13 is provided to prevent conduction between the paste electrodes 12-12. A porous separator that is ion-permeable and has non-electron conductivity, and 14 is a non-conductive gasket provided to hold the paste electrode and shield it from the outside. In this device, a paste electrode was filled in a recess formed by attaching a non-conductive gasket punched in a ring shape and a conductive separator by a doctor knife method or the like.
It is obtained by laminating two sheets through a porous separator and vulcanizing and bonding.
第５図は従来の電気二重層コンデンサの断面図であ
る。ここで16は素子15を積層した積層体、９は導電性金
属ケース、８は金属ケース９の内側面の積層体16の短絡
を防止する絶縁ケース7cの上下面に、リード端子を有す
る第１の電極板7aと第２の電極板7bを配置した組立電極
である。電気二重層コンデンサは、ペースト電極12内の
接触抵抗等を減らすために積層体16に上下から１〜100k
g/cm2の圧力を加え、これを保持した状態で金属ケース
９の開口端を内側に折曲げてかしめ封口している。FIG. 5 is a sectional view of a conventional electric double layer capacitor. Here, 16 is a laminated body in which elements 15 are laminated, 9 is a conductive metal case, 8 is a first case having lead terminals on the upper and lower surfaces of an insulating case 7c for preventing short-circuiting of the laminated body 16 on the inner side surface of the metal case 9. It is an assembled electrode in which the electrode plate 7a and the second electrode plate 7b are arranged. The electric double layer capacitor has a laminated body 16 with a thickness of 1 to 100 k from above and below in order to reduce the contact resistance in the paste electrode 12.
A pressure of g / cm 2 is applied, and while maintaining this, the open end of the metal case 9 is bent inward to caulk and seal.
上述した従来の電気二重層コンデンサは、粉末活性炭
同志および粉末活性炭と導電性セパレータの間の接触抵
抗が大きいために、かしめ封口時の圧力を上げて電気二
重層コンデンサの等価直列抵抗（以下ESRと称す）を小
さくしているが、かしめ封口時の圧力を100kg/cm3以上
に上げてしまうと、多孔性セパレータが破れてしまう恐
れがあるため、ESRを小さくしにくいという欠点があ
る。The above-mentioned conventional electric double layer capacitors have a large contact resistance between the powdered activated carbon and the powdered activated carbon and the conductive separator, so the pressure at the time of caulking is increased to increase the equivalent series resistance (hereinafter referred to as ESR) of the electric double layer capacitor. However, if the pressure at the time of caulking and sealing is raised to 100 kg / cm 3 or more, the porous separator may be broken, and it is difficult to reduce the ESR.
本発明の目的は、粉末活性炭と導電性セパレータの間
の接触抵抗を減らし、かしめ封口時の圧力を低くしても
小さいESRを備えた電気二重層コンデンサを提供するこ
とにある。An object of the present invention is to provide an electric double layer capacitor having a small ESR even if the contact resistance between the powdered activated carbon and the conductive separator is reduced and the pressure at the time of caulking and sealing is reduced.
本発明の電気二重層コンデンサは、電気二重層現象に
より電荷蓄積作用を示す電気二重層コンデンサ素子を単
位としこれを積層して成る素子積層体と、前記素子積層
体を収納する筒状金属製外装ケースとを含み、前記外装
ケースをして前記素子積層体の収納時に外部から加えた
積層方向の圧力を収納後にも保持せしめる構造の電気二
重層コンデンサにおいて、前記単位の電気二重層コンデ
ンサ素子が、イオン透過性で非電子伝導性の多孔性セパ
レータと、前記多孔性セパレータを挾んで対置された一
対の枠状非導電性ガスケットと、前記ガスケットのそれ
ぞれと前記多孔性セパレータとで囲まれる空間内に充填
されて前記多孔性セパレータを挾んで対向する二つのペ
ースト電極層と、前記ガスケットのそれぞれに蓋状に圧
着されて前記ペースト電極層をこれに密着する状態で内
部に封止する二つの導電性セパレータとから構成され、
前記導電性セパレータは、少なくとも前記ペースト電極
層と密着する側の表面に、導電性カーボン粉末が圧着さ
れていることを特徴とする。The electric double layer capacitor according to the present invention comprises an element laminated body formed by laminating electric double layer capacitor elements, each of which has a charge storage function by an electric double layer phenomenon, as a unit, and a cylindrical metal exterior housing the element laminated body. An electric double layer capacitor including a case, wherein the outer case is used to hold the pressure in the stacking direction applied from the outside when the device laminated body is housed even after the housing, in which the electric double layer capacitor device of the unit is, Ion-permeable and non-electroconductive porous separator, a pair of frame-shaped non-conductive gaskets that are opposed to each other across the porous separator, in a space surrounded by each of the gaskets and the porous separator Two paste electrode layers that are filled and sandwich the porous separator and face each other, and are pressed into a lid shape on each of the gaskets to form the paste. Is composed of a two conductive separator for sealing the interior in a state of close contact with the electrode layer to this,
The conductive separator is characterized in that conductive carbon powder is pressure-bonded to at least a surface of the conductive separator which is in close contact with the paste electrode layer.
上記の電気二重層コンデンサは、シート状の導電性セ
パレータと枠状の非導電性ガスケットとを圧着させてペ
ースト電極充填用の凹部を形成する工程と、予め形成し
たペースト電極を前記電極充填用凹部に充填する工程
と、前記ペースト電極が充填された導電性セパレータと
非導電性ガスケットとの圧着体を二つ多孔性セパレータ
を介して配置し、加圧して合体させて電気二重層コンデ
ンサ素子を得る工程と、前記電気二重層コンデンサ素子
を積層した後筒状金属製の外装ケースに収納する工程と
を含む電気二重層コンデンサの製造方法において、前記
ペースト電極充填用凹部形成工程では、前記導電性セパ
レータとして導電性の未加硫ゴムを用いると共に、少く
ともその一方の表面に、予めカーボン粉末を加熱し圧着
しておく工程を設けたことを特徴とする電気二重層コン
デンサの製造方法により製造される。In the electric double layer capacitor, a step of forming a concave portion for filling a paste electrode by press-bonding a sheet-shaped conductive separator and a frame-shaped non-conductive gasket, and a paste electrode formed in advance is used as the electrode filling concave portion. And a pressure-bonded body of a conductive separator filled with the paste electrode and a non-conductive gasket are disposed via two porous separators, and the combined pressure is applied to obtain an electric double layer capacitor element. In a method of manufacturing an electric double layer capacitor, which comprises a step of stacking the electric double layer capacitor element and then storing the electric double layer capacitor element in a tubular metal outer case, in the paste electrode filling recess forming step, the conductive separator is used. A conductive unvulcanized rubber is used as the material, and at least one surface of the rubber is preheated with carbon powder so as to be pre-bonded. Produced by the process of the electric double layer capacitor characterized by and.
次に、本発明について図面を参照して説明する。第１
図および第２図は本発明の一実施例の電気二重層コンデ
ンサ素子および製品の断面図である。Next, the present invention will be described with reference to the drawings. First
FIG. 2 and FIG. 2 are sectional views of an electric double layer capacitor element and a product according to an embodiment of the present invention.
第１図において、内径6mm,外径11mmに打抜き成形した
リング状シートからなる厚さ0.5mmで未加硫ブチルゴム
製の非導電性ガスケット４の下面に、第３図（ａ）〜
（ｄ）のように厚さ0.2mm,直径11mmの未加硫ブチルゴム
からなる導電性セパレータ１の表面に、導電性カーボン
粉末1aを塗布し、その上から加熱圧着用ヒータ10を130
℃30秒押しあてて導電性セパレータ１の表面と導電性カ
ーボン1aを圧着させたものを、導電性カーボン1aを圧着
させた面を内側にして同心円上に配置・圧着させて凹部
を形成する。さらに前述の凹部に、粉末活性炭と30重量
％硫酸との混合物からなるカーボンペースト電極２をド
クターナイフ工法で充填し、ペースト充填シート（図示
省略）を得る。このペースト充填シートの一対を、カー
ボンペースト電極２面が相対する方向で、厚さ0.05mm,
直径8mmのポリプロピレン製の多孔性セパレータ３を介
して同心円上に配置・合体した後、4kg/cm2の圧力を合
体方向に加圧・保持した状態で125±５℃の温度雰囲気
で３時間放置し、未加硫ブチルゴム間を共加硫接着させ
て本発明の電気二重層コンデンサ素子５を得た。In FIG. 1, a non-conductive gasket 4 made of unvulcanized butyl rubber and having a thickness of 0.5 mm, which is made of a ring-shaped sheet punched and formed to have an inner diameter of 6 mm and an outer diameter of 11 mm, is provided on the lower surface of FIG.
As shown in (d), conductive carbon powder 1a is applied to the surface of a conductive separator 1 made of unvulcanized butyl rubber having a thickness of 0.2 mm and a diameter of 11 mm, and a heater 10 for thermocompression bonding is applied to the surface of the conductive carbon powder 1a.
The surface of the conductive separator 1 and the conductive carbon 1a are pressed against each other by pressing at 30 ° C. for 30 seconds, and the surface on which the conductive carbon 1a is pressed is placed in a concentric circle and pressed to form a recess. Further, a carbon paste electrode 2 made of a mixture of powdered activated carbon and 30% by weight sulfuric acid is filled in the above-mentioned concave portion by a doctor knife method to obtain a paste filling sheet (not shown). A pair of the paste-filled sheets are arranged in a direction in which the two surfaces of the carbon paste electrodes face each other and have a thickness of 0.05 mm,
After arranging and merging on a concentric circle through a porous separator 3 made of polypropylene with a diameter of 8 mm, 4 kg / cm 2 of pressure was applied and held in the merging direction and left for 3 hours at a temperature of 125 ± 5 ° C. Then, the unvulcanized butyl rubbers were co-vulcanized and adhered to each other to obtain the electric double layer capacitor element 5 of the present invention.
次に、第２図に示すように、本発明の素子を６枚積層
して積層体６を形成し、導電性金属ケース９内に組立電
極８と共に収納し、積層体６の上から30kg/cm2の圧力を
加えたまま金属ケース９の開口端部をかしめ封口して電
気二重層コンデンサを得た。Next, as shown in FIG. 2, six elements of the present invention are laminated to form a laminated body 6, which is housed in a conductive metal case 9 together with the assembled electrode 8 from the top of the laminated body 6 at 30 kg / With the pressure of cm 2 applied, the open end of the metal case 9 was caulked and sealed to obtain an electric double layer capacitor.
さらに、導電性セパレータを従来のものにする以外は
本発明例と同一の製造条件で、従来例の電気二重層コン
デンサを得た。Further, an electric double layer capacitor of the conventional example was obtained under the same manufacturing conditions as those of the example of the present invention except that the conductive separator was changed to the conventional one.
本発明の実施例と従来例の電気二重層コンデンサ各10
0個の電気的特性の平均値を第１表に示す。Each of the electric double layer capacitors of the example of the present invention and the conventional example
Table 1 shows the average values of the electrical characteristics of 0 pieces.
第１表から明らかなように、同じ製造条件でありなが
ら、本発明の実施例の等価直列抵抗は従来例の約1/2と
小さくすることができた。As is apparent from Table 1, under the same manufacturing conditions, the equivalent series resistance of the embodiment of the present invention could be reduced to about half that of the conventional example.
〔発明の効果〕 以上説明したように本発明は、導電性セパレータの表
面に導電性カーボンを圧着することにより、粉末活性炭
と導電性セパレータの間の接触抵抗を減らし、かしめ封
口時の圧力を低くしても小さいESRを得ることができ
る。 (Effect of the invention) As described above, the present invention reduces the contact resistance between the powdered activated carbon and the conductive separator by crimping the conductive carbon on the surface of the conductive separator, and lowers the pressure when caulking and sealing. Even so, a small ESR can be obtained.
このように本発明例の電気二重層コンデンサは工業的
価値大なるものがある。As described above, the electric double layer capacitor of the example of the present invention has great industrial value.
第１図は本発明の一実施例の電気二重層コンデンサ素子
の断面図、第２図は本発明の一実施例の電気二重層コン
デンサの断面図、第３図（ａ）〜（ｄ）は本発明に使用
する導電性セパレータの製造工程を示す断面図で第３図
（ａ）は導電性セパレータの断面図、第３図（ｂ）は導
電性セパレータの表面に導電性カーボンを塗布した状態
の断面図、第３図（ｃ）は導電性セパレータに導電性カ
ーボンを圧着している最中の断面図、第３図（ｄ）は圧
着完了後の導電性セパレータの断面図、第４図は従来例
の電気二重層コンデンサ素子の断面図、第５図は従来例
の電気二重層コンデンサの断面図である。 1,11……導電性セパレータ、1a……導電性カーボン、2,
12……導電性カーボン、3,13……多孔性セパレータ、4,
14……非導電性ガスケット、５……本発明による素子、
６……本発明による素子の積層体、7a……第１の電極
板、7b……第２の電極板、7c……絶縁ケース、８……組
立電極、９……導電性金属ケース、10……加熱・圧着ヒ
ータ、15……従来の素子、16……従来の素子の積層体。1 is a sectional view of an electric double layer capacitor element according to an embodiment of the present invention, FIG. 2 is a sectional view of an electric double layer capacitor according to an embodiment of the present invention, and FIGS. 3 (a) to 3 (d) are FIG. 3A is a cross-sectional view showing a process for producing a conductive separator used in the present invention. FIG. 3A is a cross-sectional view of the conductive separator, and FIG. 3B is a state in which conductive carbon is applied to the surface of the conductive separator. FIG. 3 (c) is a cross-sectional view of the conductive separator being pressure-bonded with conductive carbon, and FIG. 3 (d) is a cross-sectional view of the conductive separator after pressure-bonding is completed. Is a sectional view of a conventional electric double layer capacitor element, and FIG. 5 is a sectional view of a conventional electric double layer capacitor element. 1,11 …… Conductive separator, 1a …… Conductive carbon, 2,
12 ... Conductive carbon, 3,13 ... Porous separator, 4,
14 ... Non-conductive gasket, 5 ... Element according to the present invention,
6 ... Stack of elements according to the present invention, 7a ... First electrode plate, 7b ... Second electrode plate, 7c ... Insulating case, 8 ... Assembly electrode, 9 ... Conductive metal case, 10 …… Heating / compression heater, 15 …… Conventional element, 16 …… Layered body of conventional element.
Claims (2)
電気二重層コンデンサ素子を単位としこれを積層して成
る素子積層体と、前記素子積層体を収納する筒状金属製
外装ケースとを含み、前記外装ケースをして前記素子積
層体の収納時に外部から加えた積層方向の圧力を収納後
にも保持せしめる製造の電気二重層コンデンサにおい
て、 前記単位の電気二重層コンデンサ素子が、イオン透過性
で非電子伝導性の多孔性セパレータと、前記多孔性セパ
レータを挾んで対置された一対の枠状非導電性ガスケッ
トと、前記ガスケットのそれぞれと前記多孔性セパレー
タとで囲まれる空間内に充填されて前記多孔性セパレー
タを挾んで対向する二つのペースト電極層と、前記ガス
ケットのそれぞれに蓋状に圧着されて前記ペースト電極
層をこれに密着する状態で内部に封止する二つの導電性
セパレータとから構成され、 前記導電性セパレータは、少なくとも前記ペースト電極
層と密着する側の表面に、導電性カーボン粉末が圧着さ
れていることを特徴とする電気二重層コンデンサ。1. An element stack comprising an electric double layer capacitor element, which exhibits a charge storage action by an electric double layer phenomenon, as a unit, and a tubular metal outer case that houses the element stack. In the electric double layer capacitor manufactured by using the outer case to hold the pressure in the stacking direction applied from the outside when the device laminated body is stored, the electric double layer capacitor element of the unit is ion-permeable. A non-electroconductive porous separator, a pair of frame-shaped non-conductive gaskets that are opposed to each other with the porous separator sandwiched between them, and each of the gaskets and the porous separator are filled in a space surrounded by the Two paste electrode layers facing each other across the porous separator, and crimped like a lid on each of the gaskets to adhere the paste electrode layer to this. It is composed of two conductive separators sealed inside in a state, the conductive separator is characterized in that conductive carbon powder is pressure-bonded to at least the surface of the side that is in close contact with the paste electrode layer. An electric double layer capacitor.
ンデンサを製造する方法であって、シート状の導電性セ
パレータと枠状の非導電性ガスケットとを圧着させてペ
ースト電極充填用の凹部を形成する工程と、予め形成し
たペースト電極を前記電極充填用凹部に充填する工程
と、前記ペースト電極が充填された導電性セパレータと
非導電性ガスケットとの圧着体を二つ多孔性セパレータ
を介して配置し、加圧して合体させて電気二重層コンデ
ンサ素子を得る工程と、前記電気二重層コンデンサ素子
を積層した後筒状金属製の外装ケースに収納する工程と
を含む電気二重層コンデンサの製造方法において、 前記ペースト電極充填用凹部形成工程では、前記導電性
セパレータとして導電性の未加硫ゴムを用いると共に、
少くともその一方の表面に、予めカーボン粉末を加熱し
圧着しておく工程を設けたことを特徴とする電気二重層
コンデンサの製造方法。2. A method for manufacturing an electric double layer capacitor according to claim 1, wherein a sheet-shaped conductive separator and a frame-shaped non-conductive gasket are pressure-bonded to each other to fill a paste electrode. A step of forming a concave portion, a step of filling a preformed paste electrode into the electrode filling concave portion, two porous separators with a pressure-bonded body of a conductive separator filled with the paste electrode and a non-conductive gasket Of the electric double layer capacitor including a step of arranging the electric double layer capacitor by pressing and combining them to obtain an electric double layer capacitor element, and a step of stacking the electric double layer capacitor element and then housing the electric double layer capacitor element in a tubular metal outer case. In the manufacturing method, in the paste electrode filling recess forming step, using a conductive unvulcanized rubber as the conductive separator,
A method for producing an electric double layer capacitor, comprising the step of previously heating and crimping carbon powder on at least one surface thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1006308A JP2564927B2 (en) | 1989-01-13 | 1989-01-13 | Electric double layer capacitor and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1006308A JP2564927B2 (en) | 1989-01-13 | 1989-01-13 | Electric double layer capacitor and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02186615A JPH02186615A (en) | 1990-07-20 |
| JP2564927B2 true JP2564927B2 (en) | 1996-12-18 |
Family
ID=11634746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1006308A Expired - Lifetime JP2564927B2 (en) | 1989-01-13 | 1989-01-13 | Electric double layer capacitor and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2564927B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6493210B2 (en) | 1998-01-23 | 2002-12-10 | Matsushita Electric Industrial Co., Ltd. | Electrode metal material, capacitor and battery formed of the material and method of producing the material and the capacitor and battery |
| WO1999038177A1 (en) * | 1998-01-23 | 1999-07-29 | Matsushita Electric Industrial Co., Ltd. | Metal electrode material, capacitor using metal electrode material, and method of manufacture |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5717136U (en) * | 1980-06-30 | 1982-01-28 | ||
| JPS63147808U (en) * | 1987-03-18 | 1988-09-29 |
-
1989
- 1989-01-13 JP JP1006308A patent/JP2564927B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02186615A (en) | 1990-07-20 |
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