JP3310690B2 - Electrolytic solution for electrolytic capacitors - Google Patents
Electrolytic solution for electrolytic capacitorsInfo
- Publication number
- JP3310690B2 JP3310690B2 JP08491592A JP8491592A JP3310690B2 JP 3310690 B2 JP3310690 B2 JP 3310690B2 JP 08491592 A JP08491592 A JP 08491592A JP 8491592 A JP8491592 A JP 8491592A JP 3310690 B2 JP3310690 B2 JP 3310690B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic
- electrolytic solution
- solvent
- butanediol
- 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
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電解コンデンサの電解
液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 an electrolytic capacitor.
【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−ルおよび水を主体とした溶媒に、有機
酸あるいはその塩を溶解した電解液が多用されていた。
しかし、エチレングリコ−ルおよび水を主体とした溶媒
を使用した電解コンデンサは、溶媒の融点との関係で、
低温雰囲気におけるコンデンサとしての信頼性が低いた
め、γ−ブチロラクトンやＮ，Ｎ−ジメチルホルムアミ
ドが使用されるようになった。2. Description of the Related Art Conventionally, electrolytic solutions for electrolytic capacitors include:
An electrolytic solution in which an organic acid or a salt thereof is dissolved in a solvent mainly composed of ethylene glycol and water has been frequently used.
However, an electrolytic capacitor using a solvent mainly composed of ethylene glycol and water has a problem in relation to the melting point of the solvent.
Because of low reliability as a capacitor in a low-temperature atmosphere, γ-butyrolactone and N, N-dimethylformamide have been used.
【０００３】[0003]
【発明が解決しようとする課題】しかし、ジメチルホル
ムアミドは人体に及ぼす影響が大きいために好ましくな
く、γ−ブチロラクトンも高温雰囲気中における蒸気圧
が高いために、電解コンデンサは、外観膨張を発生しや
すいという問題を有していた。However, dimethylformamide is not preferable because it has a large effect on the human body, and γ-butyrolactone also has a high vapor pressure in a high-temperature atmosphere. Had the problem that
【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
には、使用する溶媒を高沸点かつ低凝固点のものにすれ
ば良い。すなわち、有機酸あるいはその塩を溶質とした
電解コンデンサの電解液において、１，３−ブタンジオ
ールを主体とした溶媒中へ有機酸あるいはその塩を溶解
したことを特徴とする電解液である。In order to solve these problems, the solvent used should have a high boiling point and a low freezing point. That is, the electrolytic solution of an electrolytic capacitor using an organic acid or a salt thereof as a solute is obtained by dissolving an organic acid or a salt thereof in a solvent mainly containing 1,3-butanediol.
【０００５】[0005]
【作用】本発明の電解液に使用した１，３−ブタンジオ
ールは、低凝固点であると同時に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、低温においても電解液の凝固が起こりにくいため、
低温特性が向上する。さらに人体に及ぼす影響も無視で
きる程度であることから、非常に扱いやすい。The 1,3-butanediol used in the electrolytic solution of the present invention has a low freezing point, a high boiling point and a low vapor pressure, so that no abnormal appearance due to vaporization of the electrolytic solution occurs, The solidification of the electrolyte is unlikely to occur even in
Low temperature characteristics are improved. Furthermore, since the effect on the human body is negligible, it is very easy to handle.
【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は、各種溶媒の沸点および凝固点を示した。表
２は、本発明の電解液と従来の電解液を用いて試作し
た、定格２５０Ｖ，３３０μＦのアルミニウム電解コン
デンサ用の電解液組成と、−４０℃における定格容量に
対する容量保持率を示す。表３は、表２中に示したアル
ミニウム電解コンデンサの１１５℃における高温負荷試
験の結果を示した。なお、表中電解液試料記号Ａ，Ｂ，
Ｃは従来例、Ｅ，Ｆは本発明例であり、また、エチレン
グリコ−ルはＥＧ、γ−ブチロラクトンはＧＢＬ、Ｎ，
Ｎ−ジメチルホルムアミドはＤＭＦ、２−エチル−１，
３−ヘキサンジオールはＥＨＤ、１，３−ブタンジオー
ルはＢＤと各々記号で示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described. Table 1 shows the boiling points and freezing points of the various solvents. Table 2 shows the composition of the electrolytic solution for an aluminum electrolytic capacitor rated at 250 V and 330 μF, which was produced using the electrolytic solution of the present invention and a conventional electrolytic solution, and the capacity retention ratio at -40 ° C. with respect to the rated capacity. Table 3 shows the results of the high-temperature load test at 115 ° C. of the aluminum electrolytic capacitors shown in Table 2. The electrolyte sample symbols A, B, and
C is a conventional example, E and F are examples of the present invention, and ethylene glycol is EG, γ-butyrolactone is GBL, N,
N-dimethylformamide is DMF, 2-ethyl-1,
3-hexanediol is indicated by EHD, and 1,3-butanediol is indicated by BD.
【０００７】[0007]
【表１】 [Table 1]
【０００８】[0008]
【表２】 [Table 2]
【０００９】[0009]
【表３】 [Table 3]
【００１０】表から明かなように、本発明に係わる試料
記号Ｅ，Ｆ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。さらに−４０℃において
も、γ−ブチロラクトン、Ｎ，Ｎ−ジメチルホルムアミ
ドを溶媒とした従来例と比較しても容量変化率の点でほ
ぼ同等である。なお、１，３−ブタンジオールは、溶媒
全体に占める重量比で５０％未満の場合には、エチレン
グリコールおよび水の影響により、特に低温特性の改善
効果が少なくなるため好ましくない。As is clear from the table, the electrolytes of sample symbols E and F according to the present invention do not show any external expansion due to the vaporization of the electrolyte in a high-temperature atmosphere, as compared with the conventional electrolytes.
There is no decrease in reliability. Furthermore, even at -40 ° C, the capacity change rate is almost the same as in the conventional example using γ-butyrolactone and N, N-dimethylformamide as solvents. If the weight ratio of 1,3-butanediol to the entire solvent is less than 50%, it is not preferable because the effect of ethylene glycol and water to improve the low-temperature characteristics is particularly reduced.
【００１１】[0011]
【発明の効果】以上のように、１，３−ブタンジオール
を主溶媒とする溶媒中に、有機酸あるいはその塩を溶解
したことを特徴とする電解液は、人体への影響も小さ
く、かつ高沸点、低凝固点であるため、この電解液を用
いた電解コンデンサは、広い温度範囲において良好な特
性を示すと同時に扱い易い。特に、広い温度範囲で使用
可能であることは、今後さらに重要視される項目であ
り、工業的ならびに実用的価値の大なるものである。As described above, an electrolytic solution characterized by dissolving an organic acid or a salt thereof in a solvent containing 1,3-butanediol as a main solvent has a small effect on the human body, and Since it has a high boiling point and a low freezing point, an electrolytic capacitor using this electrolytic solution exhibits good characteristics over a wide temperature range and is easy to handle. In particular, the ability to be used in a wide temperature range is an item to be further emphasized in the future, and has great industrial and practical value.
Claims (2)
解コンデンサの電解液において、１，３−ブタンジオー
ルを主溶媒とすることを特徴とする電解コンデンサの電
解液。1. An electrolytic solution for an electrolytic capacitor comprising an organic acid or a salt thereof as a solute and 1,3-butanediol as a main solvent.
体に占める重量比で５０〜１００％であることを特徴と
する請求項１の電解コンデンサの電解液。2. The electrolytic solution according to claim 1, wherein said 1,3-butanediol accounts for 50 to 100% by weight of the whole solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08491592A JP3310690B2 (en) | 1992-03-06 | 1992-03-06 | Electrolytic solution for electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08491592A JP3310690B2 (en) | 1992-03-06 | 1992-03-06 | Electrolytic solution for electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05251278A JPH05251278A (en) | 1993-09-28 |
| JP3310690B2 true JP3310690B2 (en) | 2002-08-05 |
Family
ID=13844020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08491592A Expired - Fee Related JP3310690B2 (en) | 1992-03-06 | 1992-03-06 | Electrolytic solution for electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3310690B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017228738A (en) * | 2016-06-24 | 2017-12-28 | ニチコン株式会社 | Electrolytic solution and electrolytic capacitor |
-
1992
- 1992-03-06 JP JP08491592A patent/JP3310690B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05251278A (en) | 1993-09-28 |
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