JP3078171B2 - Electrolyte for driving electrolytic capacitors - Google Patents
Electrolyte for driving electrolytic capacitorsInfo
- Publication number
- JP3078171B2 JP3078171B2 JP06042420A JP4242094A JP3078171B2 JP 3078171 B2 JP3078171 B2 JP 3078171B2 JP 06042420 A JP06042420 A JP 06042420A JP 4242094 A JP4242094 A JP 4242094A JP 3078171 B2 JP3078171 B2 JP 3078171B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolyte
- present
- electrolytic
- electrolytic solution
- electrolytic capacitors
- 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
Links
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電解コンデンサの駆動
用電解液（以下電解液という）に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic solution for driving an electrolytic capacitor (hereinafter referred to as an electrolytic solution).
【０００２】[0002]
【従来の技術】従来より電解コンデンサの電解液には、
エチレングリコ−ルを主体とした溶媒に、ほう酸あるい
はほう酸アンモニウムを溶解した電解液が多用されてい
る。しかしこの種の電解液は、１００℃を超える高温雰
囲気中での特性が極端に劣る。そこで、高温での特性を
向上させるため、エチレングリコ−ルを主体とした溶媒
に、７−ビニル−９−ヘキサデセン−１，１６−ジカル
ボン酸、１，６−デカンジカルボン酸、アゼライン酸、
アジピン酸等の有機カルボン酸およびその塩を使用した
有機酸系電解液が知られている。2. Description of the Related Art Conventionally, electrolytic solutions for electrolytic capacitors include:
An electrolytic solution in which boric acid or ammonium borate is dissolved in a solvent mainly composed of ethylene glycol has been widely used. However, this type of electrolyte has extremely poor properties in a high-temperature atmosphere exceeding 100 ° C. Therefore, in order to improve the properties at high temperatures, 7-vinyl-9-hexadecene-1,16-dicarboxylic acid, 1,6-decanedicarboxylic acid, azelaic acid,
Organic acid-based electrolytes using organic carboxylic acids such as adipic acid and salts thereof are known.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら上述の有
機酸系電解液は、高温における火花電圧が十分でなく改
善が望まれていた。本発明は、この問題を解決するもの
である。即ち、高温における火花電圧を高め、耐熱性に
優れた、高温雰囲気中での信頼性の高い中高圧コンデン
サ用電解液を提供するものである。However, the above-mentioned organic acid-based electrolyte does not have a sufficient spark voltage at a high temperature, and it has been desired to improve the spark voltage. The present invention solves this problem. That is, an object of the present invention is to provide an electrolyte solution for a medium-to-high voltage capacitor which has a high spark voltage at a high temperature and has excellent heat resistance and high reliability in a high temperature atmosphere.
【０００４】[0004]
【課題を解決するための手段】これらの問題を解決する
為に、有機酸あるいはその塩を溶質とし、エチレングリ
コ−ルを主溶媒とした電解コンデンサの電解液におい
て、３−メチル−１，５−ペンタンジオ−ルを副溶媒と
することを特徴とする電解コンデンサの電解液である。
またその副溶媒の添加量は、溶液全体に占める比率が
２．０〜２０．０重量％存在する事を特徴とするもので
ある。In order to solve these problems, an electrolytic solution of an electrolytic capacitor using an organic acid or a salt thereof as a solute and ethylene glycol as a main solvent is used as a solvent. -An electrolytic solution for an electrolytic capacitor, characterized in that pentanediol is used as a secondary solvent.
The amount of the co-solvent added is characterized in that the ratio of the co-solvent to the whole solution is 2.0 to 20.0% by weight.
【０００５】[0005]
【作用】本発明の電解液に使用した３−メチル−１，５
−ペンタンジオ−ルは、沸点がエチレングリコ−ルの１
９８℃に対し２５０℃と高く、高沸点かつ低蒸気圧であ
るため、電解液の気化による外観異常が発生せず、ま
た、側鎖が存在することによる立体障害のためにエステ
ル化反応が抑制される。さらにエチレングリコ−ルより
も分子量が大きいため、電極箔の表面に付着することに
より、絶縁破壊を抑制し火花電圧が上昇するものと考え
られる。The 3-methyl-1,5 used in the electrolyte of the present invention.
-Pentanediol has a boiling point of 1 of ethylene glycol.
High boiling point and low vapor pressure at 250 ° C compared to 98 ° C, no abnormal appearance due to vaporization of electrolyte, and suppression of esterification reaction due to steric hindrance due to the presence of side chains Is done. Furthermore, since the molecular weight is larger than that of ethylene glycol, it is considered that, by adhering to the surface of the electrode foil, dielectric breakdown is suppressed and the spark voltage is increased.
【０００６】[0006]
【実施例】以下、本発明の具体的実施例について説明す
る。表１，２は、従来の電解液と本発明の電解液の組
成、比抵抗、および火花発生電圧について比較例を示
す。表３は、表１，２に示した電解液を用いて試作した
定格４５０Ｖ，１０μＦのアルミニウム電解コンデンサ
による、１２５℃における１０００時間高温負荷試験を
行った結果を示す。なお、表中電解液試料記号Ａ，Ｂ，
Ｃは従来例、記号Ｄ，Ｅ，Ｆ，Ｇ，Ｈは本発明例であ
り、また記号ＥＧはエチレングリコ−ル、記号ＭＰＤは
３−メチル−１，５−ペンタンジオ−ルを示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described. Tables 1 and 2 show comparative examples of the composition, specific resistance, and spark generation voltage of the conventional electrolytic solution and the electrolytic solution of the present invention. Table 3 shows the results of a 1000-hour high-temperature load test at 125 ° C. using a 450-V rated, 10 μF aluminum electrolytic capacitor that was prototyped using the electrolytes shown in Tables 1 and 2. The electrolyte sample symbols A, B, and
C is a conventional example, symbols D, E, F, G, and H are examples of the present invention. Symbol EG is ethylene glycol, and symbol MPD is 3-methyl-1,5-pentaneddiol.
【０００７】[0007]
【表１】 [Table 1]
【０００８】[0008]
【表２】 [Table 2]
【０００９】[0009]
【表３】 [Table 3]
【００１０】表１，２から明らかなように、本発明例の
試料記号Ｄ，Ｅ，Ｆ，Ｇ，Ｈの電解液は従来の電解液に
比べて火花発生電圧が高く、特に高温になるほどその効
果は大きい。また、表３から明かなように、本発明例の
試料記号Ｄ，Ｅ，Ｆ，Ｇ，Ｈの電解液は従来の電解液に
比べ、高温雰囲気中での電解液の気化による外観膨張が
見られず、また、信頼性の低下も見られない。なお、３
−メチル−１，５−ペンタンジオ−ルの溶液全体に占め
る割合が２．０重量％未満の場合には、主溶媒であるエ
チレングリコ−ルの性質が強く改善効果が少なく、ま
た、２０．０重量％を超えると比抵抗の上昇が著しい為
好ましくない。また、本発明は、例として７−ビニル−
９−ヘキサデセン−１，１６−ジカルボン酸、１，６−
デカンジカルボン酸、アゼライン酸を示したが、これら
の有機酸に限定されるものではなく、他の有機酸および
その塩の場合でも上述の効果が得られる。As is clear from Tables 1 and 2, the electrolytes of the sample symbols D, E, F, G and H of the present invention have a higher spark generation voltage than the conventional electrolytes. The effect is great. Further, as is apparent from Table 3, the electrolytes of the sample symbols D, E, F, G, and H of the present invention exhibited a larger external expansion due to the vaporization of the electrolyte in a high-temperature atmosphere than the conventional electrolyte. No decrease in reliability was observed. In addition, 3
When the proportion of -methyl-1,5-pentaneddiol in the whole solution is less than 2.0% by weight, the properties of ethylene glycol which is a main solvent are strong and the improvement effect is small, and 20.0% by weight. Exceeding the percentage by weight is not preferred because the specific resistance increases significantly. The present invention also provides, for example, 7-vinyl-
9-hexadecene-1,16-dicarboxylic acid, 1,6-
Although decanedicarboxylic acid and azelaic acid are shown, the present invention is not limited to these organic acids, and the above-mentioned effects can be obtained with other organic acids and salts thereof.
【００１１】[0011]
【発明の効果】以上のように、本発明の電解液は、高温
での火花発生電圧が上昇し、この電解液を用いた電解コ
ンデンサは、高温度において長時間安定した特性を有
し、工業的ならびに実用的価値の大なるものである。As described above, the electrolytic solution of the present invention has a high spark generation voltage at a high temperature, and an electrolytic capacitor using this electrolytic solution has stable characteristics at a high temperature for a long time. It is of great target and practical value.
Claims (2)
レングリコ−ルを主溶媒とした電解コンデンサの駆動用
電解液において、３−メチル−１，５−ペンタンジオ−
ルを副溶媒とすることを特徴とする電解コンデンサの駆
動用電解液。1. An electrolyte for driving an electrolytic capacitor comprising an organic acid or a salt thereof as a solute and ethylene glycol as a main solvent, comprising 3-methyl-1,5-pentanedio-
An electrolytic solution for driving an electrolytic capacitor, wherein the electrolytic solution is a solvent.
−ルは、溶液全体に占める比率が、２．０〜２０．０重
量％存在することを特徴とする請求項１の電解コンデン
サの駆動用電解液。2. A driving method for an electrolytic capacitor according to claim 1, wherein said 3-methyl-1,5-pentaneddiol has a ratio of 2.0 to 20.0% by weight in the whole solution. Electrolyte.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06042420A JP3078171B2 (en) | 1994-03-14 | 1994-03-14 | Electrolyte for driving electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06042420A JP3078171B2 (en) | 1994-03-14 | 1994-03-14 | Electrolyte for driving electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07249546A JPH07249546A (en) | 1995-09-26 |
| JP3078171B2 true JP3078171B2 (en) | 2000-08-21 |
Family
ID=12635579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06042420A Expired - Fee Related JP3078171B2 (en) | 1994-03-14 | 1994-03-14 | Electrolyte for driving electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3078171B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3705864B2 (en) * | 1996-05-09 | 2005-10-12 | ニチコン株式会社 | Electrolytic solution for electrolytic capacitor drive |
| JP2017228738A (en) * | 2016-06-24 | 2017-12-28 | ニチコン株式会社 | Electrolytic solution and electrolytic capacitor |
-
1994
- 1994-03-14 JP JP06042420A patent/JP3078171B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07249546A (en) | 1995-09-26 |
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