JPH0770442B2 - Electrolytic solution for driving electrolytic capacitors - Google Patents
Electrolytic solution for driving electrolytic capacitorsInfo
- Publication number
- JPH0770442B2 JPH0770442B2 JP4958787A JP4958787A JPH0770442B2 JP H0770442 B2 JPH0770442 B2 JP H0770442B2 JP 4958787 A JP4958787 A JP 4958787A JP 4958787 A JP4958787 A JP 4958787A JP H0770442 B2 JPH0770442 B2 JP H0770442B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic
- driving
- electrolytic solution
- salt
- acid
- 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)
- Primary Cells (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は低温特性に優れ、高温で安定な電解コンデンサ
の駆動用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 driving an electrolytic capacitor which has excellent low temperature characteristics and is stable at high temperatures.
従来の技術 化成したエッチドアルミニウム陽極箔と陰極箔をセパレ
ータ紙を介して巻回したコンデンサ素子に電解液を含浸
し、この素子をゴムパッキングを用いてアルミケースに
収納した構造をもつ電解コンデンサは従来エチレングリ
コールを水から成る混合溶媒にカルボン酸のアンモニウ
ム塩などを溶質とした電解液を使用したものが知られて
いる。Conventional technology An electrolytic capacitor with a structure in which a chemically etched aluminum anode foil and cathode foil wound with separator paper is impregnated with electrolytic solution, and this element is housed in an aluminum case using rubber packing is used. Conventionally, there is known one using an electrolytic solution in which a solvent such as an ammonium salt of carboxylic acid is dissolved in a mixed solvent of ethylene glycol and water.
発明が解決しようとする問題点 エチレングリコールに水から成る混合溶媒にカルボン酸
のアンモニウム塩などを溶質とした電解液は低温におい
て粘度が上昇してコンデンサの低温特性を悪化させる。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention An electrolyte containing a solute of ammonium salt of carboxylic acid in a mixed solvent of ethylene glycol and water has an increased viscosity at low temperature and deteriorates the low temperature characteristics of the capacitor.
また高温雰囲気中の負荷試験においてコンデンサの陽極
酸化皮膜および陰極箔などが水と反応した水素ガスを発
生しコンデンサ内の圧力が増加して破壊に至る場合があ
った。Further, in a load test in a high temperature atmosphere, the anodic oxide film of the capacitor, the cathode foil, and the like generate hydrogen gas that reacts with water, and the pressure inside the capacitor may increase, resulting in destruction.
問題を解決するための手段 本発明は上述の問題点を解決するため、γ−ブチロラク
トン95〜50wt%、メタノールまたはエタノール2〜20wt
%、エチレングリコール3〜30wt%の各重量比の3成分
からなる混合溶媒に対し、ボロジサリチル酸の金属塩を
5〜30wt%、およびマレイン酸の金属塩を1〜10wt%溶
解したことを特徴とする電解コンデンサの駆動用電解液
である。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides 95-50 wt% γ-butyrolactone, 2-20 wt% methanol or ethanol.
%, Ethylene glycol 3 to 30 wt%, and a mixed solvent consisting of 3 components at respective weight ratios, 5 to 30 wt% of a metal salt of borodisalicylic acid and 1 to 10 wt% of a metal salt of maleic acid are dissolved. Is an electrolytic solution for driving an electrolytic capacitor.
作用 アルミニウム電解コンデンサの電解液としてγ−ブチロ
ラクトン、メタノールまたはエタノールとエチレングリ
コールからなる混合溶媒に対し、ボロジサリチル酸とマ
レイン酸の金属塩を溶解することによって、低温におい
ても比抵抗が比較的小さく、これを用いた電解コンデン
サは容量減少およびtanδ増が抑えられ、また高温負荷
試験などの信頼性試験においても安定した特性を示す。Action γ-butyrolactone as an electrolytic solution of an aluminum electrolytic capacitor, in a mixed solvent consisting of methanol or ethanol and ethylene glycol, by dissolving the metal salt of borodisalicylic acid and maleic acid, the specific resistance is relatively small even at low temperatures, The electrolytic capacitor using this suppresses the capacitance decrease and tan δ increase, and exhibits stable characteristics in reliability tests such as high temperature load tests.
実施例 以下、本発明の具体的実施例について説明する。Examples Hereinafter, specific examples of the present invention will be described.
第1表に実施例として本発明の電解液(試料記 号A、B、C、D)と比較試料として、従来の電解液
(試料記号E)のそれぞれ電解液の組成比、同電解液の
30℃および−55℃における比抵抗を示す。The electrolytic solution of the present invention (sample description) is shown in Table 1 as an example. Nos. A, B, C, and D) as comparative samples, the composition ratios of the respective electrolytic solutions of the conventional electrolytic solution (sample symbol E),
The specific resistance at 30 ° C and -55 ° C is shown.
第2表に上記電解液A、B、C、D、Eを用いたコンデ
ンサの低温特性を示す。試料コンデンサはいずれも定格
35WV220μFのアルミニウム電解コンデンサである。Table 2 shows the low temperature characteristics of the capacitors using the electrolyte solutions A, B, C, D and E. All sample capacitors are rated
35WV 220μF aluminum electrolytic capacitor.
第3表に上記電解液A、B、C、D、Eを用いたコンデ
ンサの105℃雰囲気中で高温負荷寿命試験の結果を示
す。 Table 3 shows the results of the high temperature load life test of capacitors using the above electrolytes A, B, C, D and E in a 105 ° C. atmosphere.
上述の実施例から明らかなように本発明のγ−ブチロラ
クトン、メタノールまたはエタノールとエチレングリコ
ールの3成分からなる混合溶媒に溶質としてボロジサリ
チル酸の金属塩とマレイン酸の金属塩を溶解してなる電
解液を用いたアルミニウム電解コンデンサでは、低温特
性さらに高温負荷寿命を著しく改善している。なお、種
々実験の結果より、ボロジサリチル酸が5wt%未満で
は、電解液の比抵抗が高く、30wt%を超える量では、低
温度において析出を生ずる。同様にマレイン酸の金属塩
が1wt%未満では、電解液の比抵抗が高く、10wt%を超
える量では低温度において析出を生ずる。またメタノー
ルまたはエタノールは2wt%未満では、電解液の低温度
の比抵抗が高く、20wt%を超える量では、高温での蒸気
圧が高くなり、コンデンサを高温雰囲気中に放置した場
合、内圧上昇によりコンデンサケースを破壊する。エチ
レングリコールは3wt%未満では、マレイン酸の金属塩
を溶解させることができず、30wt%を超える量では、低
温度における電解液粘度が高くなり、低温度の比抵抗が
高くなる。また前述の実施例にはカリウム塩について示
したが、カルシウム塩、ナトリウム塩およびこの3種の
塩の混合物についても同様な結果が得られ、また各溶媒
および溶質の混合比を限定内で種々混合比を変えて、繰
り返し実験したが同様な結果が得られた。 As is apparent from the above-mentioned Examples, electrolysis obtained by dissolving a metal salt of borodisalicylic acid and a metal salt of maleic acid as a solute in a mixed solvent of γ-butyrolactone, methanol or ethanol and ethylene glycol of the present invention. Aluminum electrolytic capacitors using liquids have significantly improved low temperature characteristics and high temperature load life. From the results of various experiments, when the content of borodisalicylic acid is less than 5 wt%, the specific resistance of the electrolytic solution is high, and when it exceeds 30 wt%, precipitation occurs at low temperature. Similarly, when the metal salt of maleic acid is less than 1 wt%, the specific resistance of the electrolytic solution is high, and when it exceeds 10 wt%, precipitation occurs at low temperatures. If the amount of methanol or ethanol is less than 2 wt%, the low-temperature specific resistance of the electrolyte is high, and if it exceeds 20 wt%, the vapor pressure at high temperature becomes high, and if the capacitor is left in a high temperature atmosphere, the internal pressure rises. Destroy the capacitor case. If ethylene glycol is less than 3 wt%, the metal salt of maleic acid cannot be dissolved, and if it exceeds 30 wt%, the viscosity of the electrolytic solution at low temperature becomes high and the specific resistance at low temperature becomes high. Further, although the potassium salt is shown in the above-mentioned Examples, similar results can be obtained for a calcium salt, a sodium salt and a mixture of these three kinds of salts, and various mixing ratios of each solvent and solute can be mixed within limits. Repeated experiments with different ratios gave similar results.
発明の効果 以上のように本発明に係る電解コンデンサの駆動用電解
液は従来のものに比べ低温から高温に至るまで、極めて
安定した特性を維持し、信頼性の高い電解コンデンサが
得られる。EFFECTS OF THE INVENTION As described above, the electrolytic solution for driving the electrolytic capacitor according to the present invention maintains extremely stable characteristics from a low temperature to a high temperature as compared with the conventional one, and a highly reliable electrolytic capacitor can be obtained.
Claims (3)
ルまたはエタノール2〜20wt%、エチレングリコール3
〜30wt%の各重量比からなる混合溶媒に対し、ボロジサ
リチル酸およびマレイン酸の金属塩を溶解したことを特
徴とする電解コンデンサの駆動用電解液。1. Gamma-butyrolactone 95-50 wt%, methanol or ethanol 2-20 wt%, ethylene glycol 3
An electrolytic solution for driving an electrolytic capacitor, characterized in that metal salts of borodisalicylic acid and maleic acid are dissolved in a mixed solvent having a weight ratio of ˜30 wt%.
塩としてカリウム塩、カルシウム塩、ナトリウム塩のい
ずれか1種以上を溶解したことを特徴とする特許請求の
範囲第1項記載の電解コンデンサの駆動用電解液。2. A drive for an electrolytic capacitor according to claim 1, wherein at least one of potassium salt, calcium salt and sodium salt is dissolved as a metal salt of borodisalicylic acid and maleic acid. Electrolyte.
が5〜30wt%、マレイン酸の金属塩が1〜10wt%を溶解
したことを特徴とする特許請求の範囲第2項記載の電解
コンデンサの駆動用電解液。3. The electrolytic capacitor according to claim 2, wherein 5 to 30 wt% of the metal salt of borodisalicylic acid and 1 to 10 wt% of the metal salt of maleic acid are dissolved in the mixed solvent. Electrolyte for driving.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4958787A JPH0770442B2 (en) | 1987-03-03 | 1987-03-03 | Electrolytic solution for driving electrolytic capacitors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4958787A JPH0770442B2 (en) | 1987-03-03 | 1987-03-03 | Electrolytic solution for driving electrolytic capacitors |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63213918A JPS63213918A (en) | 1988-09-06 |
JPH0770442B2 true JPH0770442B2 (en) | 1995-07-31 |
Family
ID=12835355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4958787A Expired - Fee Related JPH0770442B2 (en) | 1987-03-03 | 1987-03-03 | Electrolytic solution for driving electrolytic capacitors |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0770442B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01173615A (en) * | 1987-12-26 | 1989-07-10 | Marcon Electron Co Ltd | Electrolyte for electrolytic condenser |
JP2007103464A (en) * | 2005-09-30 | 2007-04-19 | Okayama Univ | Electrolyte |
-
1987
- 1987-03-03 JP JP4958787A patent/JPH0770442B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPS63213918A (en) | 1988-09-06 |
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