JP3963527B2 - Aluminum electrolytic capacitor - Google Patents
Aluminum electrolytic capacitor Download PDFInfo
- Publication number
- JP3963527B2 JP3963527B2 JP17443197A JP17443197A JP3963527B2 JP 3963527 B2 JP3963527 B2 JP 3963527B2 JP 17443197 A JP17443197 A JP 17443197A JP 17443197 A JP17443197 A JP 17443197A JP 3963527 B2 JP3963527 B2 JP 3963527B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- paper
- electrolytic capacitor
- aluminum electrolytic
- separator paper
- 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
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- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、アルミニウム電解コンデンサに関するものであり、特に陰極材料の改良に関するものである。
【０００２】
【従来の技術】
アルミニウム電解コンデンサは、電解エッチングを施したアルミニウム箔を化成し酸化皮膜を形成したアルミニウム陽極箔と電解エッチングを施したアルミニウム陰極箔とをセパレータ紙を介して巻回したコンデンサ素子に駆動用電解液（以下、電解液という）を含浸し、このコンデンサ素子をゴム封口体とともにアルミニウム製外装ケース内に挿入し、外装ケースを封止加工することによって、密閉した構造を有する。また、陽極箔および陰極箔のそれぞれには、引出端子としてのタブ端子が加締やコールドウェルド法などにより固着され、ゴム封口体の端子挿通孔を通じて外部に引出されている。
【０００３】
【発明が解決しようとする課題】
アルミニウム電解コンデンサに使用されるアルミニウム陰極箔は厚みがあり、かつ金属を使用するため重く、製品の小型化を推進する上で障害となっている。
【０００４】
【課題を解決するための手段】
発明者は、アルミニウム陰極箔の代わりに、セパレータ紙の少なくとも片面に導電体層を形成することにより、金属アルミニウム箔を使用するより薄く、かつ軽量な陰極材料となることを見出した。
すなわち、本発明はアルミニウム陽極箔７と、セパレータ紙の少なくとも片面に導電体を蒸着および／または塗布してなる電極化紙１とをセパレータ紙９を介して巻回または積層してなることを特徴とするアルミニウム電解コンデンサである。該電極化紙の少なくとも片面には、炭素材を含有するゴムを塗布するか、またはアルミニウムを蒸着し、該表面に炭素材を含有するゴムを塗布したことを特徴としている。
【０００５】
【発明の実施の形態】
アルミニウム電解コンデンサにおいて、陰極材がアルミニウム陰極箔ではなく、セパレータ紙の少なくとも片面に炭素材を含有するゴムを塗布するか、またはアルミニウムを蒸着し、該表面に炭素材を含有するゴムを塗布して形成した電極化紙であるため、従来より軽量かつ高容量のアルミニウム電解コンデンサを製造することができる。
【０００６】
【実施例】
〔実施例１〕未架橋のブチルゴムに架橋剤としてジキュミルパーオキサイドを０．３０重量％添加し、これに炭素材としてカーボン粉を５０重量％となるように分散させカーボン溶液とした。該カーボン溶液をセパレータ紙の片面に塗布し、１５０℃の恒温槽中で架橋させ、塗布面にアルミニウムタブ端子をカーボンペーストにより固着した。図１はこの実施例に係る陰極の略図である。加締法によりアルミニウムタブ端子を固着したアルミニウム陽極箔と該陰極の塗布面を対向させ未塗布のセパレータ紙を介して巻回しコンデンサ素子とした。該コンデンサ素子にγ−ブチロラクトン７５重量％、ｏ−フタル酸テトラメチルアンモニウム２５重量％からなる電解液を含浸した。アルミニウム製外装ケース内に含浸したコンデンサ素子をブチルゴム封口体と共に挿入し、エージングを行い、直径１０ｍｍ、長さ１２．５ｍｍ、定格電圧２５Ｖ、静電容量２２０μＦのアルミニウム電解コンデンサ１００個を作製した。
〔実施例２〕未架橋のブチルゴムに架橋剤としてジキュミルパーオキサイドを０．３０重量％添加し、これに炭素材としてカーボン粉を５０重量％となるように分散させカーボン溶液とした。セパレータ紙の片面にアルミニウムを蒸着し、蒸着面に該カーボン溶液を塗布し、１５０℃の恒温槽中で架橋させ、塗布面にアルミニウムタブ端子をカーボンペーストにより固着した。その後実施例１と同様にして、アルミニウム電解コンデンサ１００個を作製した。
（比較例） アルミニウム陽極箔とアルミニウム陰極箔を対向させセパレータ紙を介して巻回しコンデンサ素子とした。その後実施例１と同様にして、アルミニウム電解コンデンサ１００個を作製した。
【０００７】
実施例と比較例について製品特性を調査して表１を得た。
【０００８】
【表１】
表１より明らかなように、本発明によるアルミニウム電解コンデンサは、比較例と比較して軽量かつ高容量であり、製品特性についても優れている。また、導電体層を形成する炭素材は、カーボンに限定するものではなく、導電性を有すればよいことから、例えば黒鉛パウダーも使用できる。
【００１０】
【発明の効果】
アルミニウム電解コンデンサの陰極材として、セパレータ紙の少なくとも片面に導電体を蒸着および／または塗布してなる電極化紙を用いることにより、軽量かつ高容量であり、特性の優れた製品を得ることができ、工業的ならびに実用的価値の大なるものである。
【図面の簡単な説明】
【図１】本発明に用いられる電極化紙の略図
【図２】アルミニウム電解コンデンサを構成要素に分解して示した分解図
【符号の説明】
１ 片面に蒸着または塗布された導電体を有する電極化紙
２ セパレータ紙
３ 蒸着または塗布された導電体層
４ アルミニウムタブ端子
５ コンデンサ素子
６ 封口ゴム
７ アルミニウム陽極箔
８ アルミニウムケース
９ セパレータ紙[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an aluminum electrolytic capacitor, and more particularly to improvement of a cathode material.
[0002]
[Prior art]
An aluminum electrolytic capacitor has a driving electrolyte (capacitor electrolyte) on a capacitor element formed by winding an aluminum anode foil formed by forming an oxide film by forming an electrolytically etched aluminum foil and an aluminum cathode foil subjected to electrolytic etching through a separator paper. (Hereinafter referred to as “electrolytic solution”), the capacitor element is inserted into an aluminum outer case together with a rubber sealing body, and the outer case is sealed to form a sealed structure. Further, a tab terminal as a lead terminal is fixed to each of the anode foil and the cathode foil by caulking, a cold weld method, or the like, and is drawn to the outside through a terminal insertion hole of a rubber sealing body.
[0003]
[Problems to be solved by the invention]
Aluminum cathode foils used for aluminum electrolytic capacitors are thick and heavy because of the use of metals, which is an obstacle to promoting product miniaturization.
[0004]
[Means for Solving the Problems]
The inventor has found that by forming a conductor layer on at least one side of the separator paper instead of the aluminum cathode foil, the cathode material can be made thinner and lighter than the metal aluminum foil.
That is, the present invention is characterized in that the
[0005]
DETAILED DESCRIPTION OF THE INVENTION
In an aluminum electrolytic capacitor, the cathode material is not an aluminum cathode foil, but a rubber containing a carbon material is applied to at least one side of a separator paper, or aluminum is evaporated and a rubber containing a carbon material is applied to the surface. Because of the formed electrode paper, a lighter and higher capacity aluminum electrolytic capacitor can be manufactured than before.
[0006]
【Example】
[Example 1] 0.30% by weight of dicumyl peroxide as a crosslinking agent was added to uncrosslinked butyl rubber, and carbon powder as a carbon material was dispersed to 50% by weight to obtain a carbon solution. The carbon solution was applied to one side of a separator paper and crosslinked in a thermostatic bath at 150 ° C., and an aluminum tab terminal was fixed to the coated surface with a carbon paste. FIG. 1 is a schematic view of a cathode according to this embodiment. The aluminum anode foil to which the aluminum tab terminal was fixed by the caulking method and the coated surface of the cathode were opposed to each other and wound through uncoated separator paper to obtain a capacitor element. The capacitor element was impregnated with an electrolytic solution composed of 75% by weight of γ-butyrolactone and 25% by weight of tetramethylammonium o-phthalate. A capacitor element impregnated in an aluminum outer case was inserted together with a butyl rubber sealing body and aged to perform 100 aluminum electrolytic capacitors having a diameter of 10 mm, a length of 12.5 mm, a rated voltage of 25 V, and a capacitance of 220 μF.
[Example 2] 0.30% by weight of dicumyl peroxide as a crosslinking agent was added to uncrosslinked butyl rubber, and carbon powder as a carbon material was dispersed to 50% by weight to obtain a carbon solution. Aluminum was vapor-deposited on one side of the separator paper, the carbon solution was coated on the vapor-deposited surface, and crosslinked in a thermostatic bath at 150 ° C., and an aluminum tab terminal was fixed to the coated surface with carbon paste. Thereafter, 100 aluminum electrolytic capacitors were produced in the same manner as in Example 1.
(Comparative Example) An aluminum anode foil and an aluminum cathode foil were opposed to each other and wound through a separator paper to obtain a capacitor element. Thereafter, 100 aluminum electrolytic capacitors were produced in the same manner as in Example 1.
[0007]
Table 1 was obtained by examining the product characteristics of the examples and comparative examples.
[0008]
[Table 1]
As is apparent from Table 1, the aluminum electrolytic capacitor according to the present invention is lighter in weight and higher in capacity than the comparative example, and excellent in product characteristics. In addition, the carbon material forming the conductor layer is not limited to carbon, and may be, for example, graphite powder because it only needs to have conductivity.
[0010]
【The invention's effect】
By using electrode paper made by depositing and / or applying a conductor on at least one side of the separator paper as the cathode material for aluminum electrolytic capacitors, it is possible to obtain a lightweight, high-capacity product with excellent characteristics. It is of great industrial and practical value.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of an electrode paper used in the present invention. FIG. 2 is an exploded view showing an aluminum electrolytic capacitor disassembled into components.
DESCRIPTION OF SYMBOLS 1 Electrode paper which has a conductor vapor-deposited or applied on one
Claims (2)
上記の塗布する導電体が炭素材を含有するゴムであることを特徴とするアルミニウム電解コンデンサ。An aluminum anode foil (7) and an electroded paper (1) formed by applying a conductor on at least one side of the separator paper, wound or laminated via the separator paper (9),
An aluminum electrolytic capacitor, wherein the conductor to be applied is a rubber containing a carbon material.
上記の導電体が蒸着したアルミニウム層上に炭素材を含有するゴムを塗布してなることを特徴とするアルミニウム電解コンデンサ。An aluminum anode foil (7) and an electroded paper (1) formed by depositing and applying a conductor on at least one side of the separator paper, wound or laminated via the separator paper (9),
An aluminum electrolytic capacitor obtained by coating a rubber containing a carbon material on an aluminum layer on which the conductor is deposited.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17443197A JP3963527B2 (en) | 1997-06-30 | 1997-06-30 | Aluminum electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17443197A JP3963527B2 (en) | 1997-06-30 | 1997-06-30 | Aluminum electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1126317A JPH1126317A (en) | 1999-01-29 |
| JP3963527B2 true JP3963527B2 (en) | 2007-08-22 |
Family
ID=15978421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17443197A Expired - Fee Related JP3963527B2 (en) | 1997-06-30 | 1997-06-30 | Aluminum electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3963527B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007149733A (en) * | 2005-11-24 | 2007-06-14 | Nichicon Corp | Electrolytic capacitor |
| JP5073947B2 (en) * | 2006-01-12 | 2012-11-14 | ニチコン株式会社 | Winding capacitor and method of manufacturing the same |
-
1997
- 1997-06-30 JP JP17443197A patent/JP3963527B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1126317A (en) | 1999-01-29 |
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