JP2627624B2 - Electrolyte for driving electrolytic capacitors - Google Patents
Electrolyte for driving electrolytic capacitorsInfo
- Publication number
- JP2627624B2 JP2627624B2 JP62256667A JP25666787A JP2627624B2 JP 2627624 B2 JP2627624 B2 JP 2627624B2 JP 62256667 A JP62256667 A JP 62256667A JP 25666787 A JP25666787 A JP 25666787A JP 2627624 B2 JP2627624 B2 JP 2627624B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolyte
- electrolytic solution
- acid
- electrolytic capacitors
- driving electrolytic
- 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
【発明の詳細な説明】 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。The present invention relates to an electrolytic solution for driving an electrolytic capacitor (hereinafter referred to as an electrolytic solution).
従来の技術 従来、電解液としてはエチレングリコールを主体とし
た溶媒にアジピン酸塩を溶解した電解液が多用されてい
た。2. Description of the Related Art Conventionally, as an electrolytic solution, an electrolytic solution obtained by dissolving adipate in a solvent mainly composed of ethylene glycol has been frequently used.
発明が解決しようとする問題点 近年、アルミニウム電解コンデンサの低インピーダン
ス化、小形化、高信頼化に伴い、電解液としては比抵抗
が低く広温度で安定な電解液が要求されている。エチレ
ングリコールを主体とした溶媒にアジピン酸塩を溶解し
た電解液においては比抵抗を低くするために、従来電解
液中の水分の配合比を増大したり、あるいは溶質量を増
大したものがあるが、水の配合比を増大すると高温度雰
囲気下における信頼性が著しく低下する。溶質量を増大
させると静電容量や損失の低温特性が悪化するなどの問
題があった。さらにエチレングリコールの低温における
粘度の増大により種々検討しても、使用温度範囲として
は−40℃が実用上の下限であった。Problems to be Solved by the Invention In recent years, with the reduction in impedance, the size, and the increase in reliability of aluminum electrolytic capacitors, an electrolytic solution having low specific resistance and stable at a wide temperature has been required as an electrolytic solution. In the case of electrolytes in which adipate is dissolved in a solvent mainly composed of ethylene glycol, in order to lower the specific resistance, there is a conventional case in which the mixing ratio of water in the electrolyte is increased or the dissolved mass is increased. On the other hand, if the mixing ratio of water is increased, the reliability under a high temperature atmosphere is significantly reduced. Increasing the dissolved mass has caused problems such as deterioration of low-temperature characteristics of capacitance and loss. Further, even if various investigations were made on the basis of an increase in the viscosity of ethylene glycol at a low temperature, the working temperature range was −40 ° C. as a practical lower limit.
問題点を解決するための手段 本発明の電解液は、γ−ブチロラクトンを主成分とす
る有機質溶媒に、カルボン酸アルキルアンモニウムを溶
質として溶解したものである。ここで、上記有機質溶媒
は、γ−ブチロラクトン単独、またはこれに若干量の他
の有機質溶媒を加えたものであるが、水は加えない。ま
た、溶質であるカルボン酸アルキルアンモニウム塩は、
フタル酸、マレイン酸またはレゾルシン酸のモノメチル
ジエチルアンモニウム塩またはジメチルモノエチルアン
モニウム塩である。Means for Solving the Problems The electrolytic solution of the present invention is obtained by dissolving alkylammonium carboxylate as a solute in an organic solvent containing γ-butyrolactone as a main component. Here, the organic solvent is γ-butyrolactone alone or a solution obtained by adding a small amount of another organic solvent thereto, but without adding water. Also, the alkyl ammonium carboxylate as a solute is
Monomethyl diethyl ammonium salt or dimethyl monoethyl ammonium salt of phthalic acid, maleic acid or resorcinic acid.
作用 γ−ブチロラクトンは溶質を溶解する性能が高く、結
合の極性が大きいために特に水を加えなくても十分なイ
オン解離を起こさせることができ、かつ低温での粘度変
化も極めて小さく、上述のフタル酸、マレイン酸または
レゾルシン酸のモノメチルジエチルアンモニウム塩また
はジメチルモノエチルアンモニウム塩は、γ−ブチロラ
クトン中で特に良好にイオン解離をする。Action γ-butyrolactone has a high ability to dissolve solutes, and since it has a large bond polarity, it can cause sufficient ion dissociation even without adding water, and has a very small change in viscosity at low temperatures. Monomethyldiethylammonium or dimethylmonoethylammonium salts of phthalic acid, maleic acid or resorcinic acid perform ion dissociation particularly well in γ-butyrolactone.
その結果、本発明による電解液は、比抵抗が極めて低
く、低温における溶質の析出がなく、低温における粘度
変化も著しく少ないため、アルミニウム電解コンデンサ
の静電容量や損失の低温特性を大幅に向上させることが
できる。As a result, the electrolytic solution according to the present invention has a very low specific resistance, no solute precipitation at low temperatures, and a very small change in viscosity at low temperatures, thereby significantly improving the low temperature characteristics of the capacitance and loss of an aluminum electrolytic capacitor. be able to.
実施例 以下、本発明の実施例について説明する。Examples Hereinafter, examples of the present invention will be described.
第１表は電解液組成と温度30℃および−55℃における
電解液の比抵抗値を示す。Table 1 shows the composition of the electrolyte and the specific resistance of the electrolyte at temperatures of 30 ° C. and −55 ° C.
第１表から明らかなように、本発明に係わる電解液は
従来の電解液に比べ低い比抵抗値を有し、低温において
も極めて低い比抵抗値を与えている。 As is clear from Table 1, the electrolytic solution according to the present invention has a lower specific resistance value than the conventional electrolytic solution, and gives an extremely low specific resistance value even at a low temperature.
第２表は、第１表に示す電解液を用いて試作した定格
10WV、100μＦのコンデンサの温度特性を示す。Table 2 shows the ratings made using the electrolyte shown in Table 1.
This shows the temperature characteristics of a 10 WV, 100 μF capacitor.
第２表から電解液Ａ、Ｂ、Ｃ、Ｄを用いた本発明品は
低温において電解液Ｅを用いた従来品に比較して著しく
特性が改善されている。 From Table 2, it can be seen that the products of the present invention using the electrolytes A, B, C and D have significantly improved characteristics at low temperatures as compared with the conventional products using the electrolyte E.
第３表は第１表に示す電解液で上述と同じコンデンサ
を試作し105℃で定格電圧印加の高温負荷試験を行った
結果を示す。漏れ電流は定格電圧印加１分後の値を示
す。各々の特性値は試料数20個の平均値である。Table 3 shows the results of a trial production of the same capacitor as described above using the electrolyte shown in Table 1 and a high-temperature load test at 105 ° C. with a rated voltage applied. The leakage current indicates a value one minute after the application of the rated voltage. Each characteristic value is an average value of 20 samples.
第３表から判るように電解液Ａ、Ｂ、Ｃ、Ｄを用いた
本発明のコンデンサは高温負荷試験においても、容量変
化率や損失変化が小さく、優れた耐久性を与える。 As can be seen from Table 3, the capacitor of the present invention using the electrolytes A, B, C, and D has a small capacity change rate and a small loss change even in a high-temperature load test, and gives excellent durability.
また溶質の添加量は溶媒100gに対し5g以上が好まし
く、5g未満では比抵抗を充分に低下させることができな
い。なお、添加量が飽和濃度を超えることは好ましくな
い。The amount of the solute to be added is preferably 5 g or more based on 100 g of the solvent, and if it is less than 5 g, the specific resistance cannot be sufficiently reduced. In addition, it is not preferable that the amount added exceeds the saturation concentration.
発明の効果 以上のように、本発明による電解液は、γ−ブチロラ
クトンを主成分とする有機質溶媒に、フタル酸、マレイ
ン酸、またはレゾルシン酸のモノメチルジエチルアンモ
ニウム塩またはジメチルモノエチルアンモニウム塩を溶
質として加えたことにより、アルミニウム電解コンデン
サの特に低温での特性を改善して、広い温度範囲にわた
って良好に動作する電解コンデンサの実現に貢献するも
のである。Effect of the Invention As described above, the electrolytic solution according to the present invention is characterized in that an organic solvent containing γ-butyrolactone as a main component, a phthalic acid, a maleic acid, or a monomethyldiethylammonium salt or a dimethylmonoethylammonium salt of resorcinic acid as a solute. The addition improves the characteristics of the aluminum electrolytic capacitor, particularly at low temperatures, and contributes to the realization of an electrolytic capacitor that operates well over a wide temperature range.
Claims (2)
溶媒に、カルボン酸のアルキルアンモニウム塩を溶解し
てなり、上記カルボン酸はフタル酸、マレイン酸または
レゾルシン酸であり、上記アルキルアンモニウムはモノ
メチルジエチルアンモニウムまたはジメチルモノエチル
アンモニウムであ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 alkylammonium salt of a carboxylic acid dissolved in an organic solvent containing γ-butyrolactone as a main component, wherein the carboxylic acid is phthalic acid, maleic acid or resorcinic acid, and the alkylammonium is monomethyldiethyl. An electrolytic solution for driving an electrolytic capacitor, which is ammonium or dimethylmonoethylammonium.
は、上記溶媒100gに対し5g以上溶解されることを特徴と
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. The electrolytic solution for driving an electrolytic capacitor according to claim 1, wherein 5 g or more of said alkylammonium carboxylate is dissolved in 100 g of said solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62256667A JP2627624B2 (en) | 1987-10-12 | 1987-10-12 | Electrolyte for driving electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62256667A JP2627624B2 (en) | 1987-10-12 | 1987-10-12 | Electrolyte for driving electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0198211A JPH0198211A (en) | 1989-04-17 |
| JP2627624B2 true JP2627624B2 (en) | 1997-07-09 |
Family
ID=17295796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62256667A Expired - Fee Related JP2627624B2 (en) | 1987-10-12 | 1987-10-12 | Electrolyte for driving electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2627624B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2906011B2 (en) * | 1993-04-26 | 1999-06-14 | エルナー株式会社 | Aluminum electrolytic capacitor and electrolyte for driving aluminum electrolytic capacitor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS617617A (en) * | 1984-06-21 | 1986-01-14 | エルナ−株式会社 | Electrolyte for driving electrolytic condenser |
| JPS6437822A (en) * | 1987-08-04 | 1989-02-08 | Asahi Glass Co Ltd | Electrolytic capacitor |
-
1987
- 1987-10-12 JP JP62256667A patent/JP2627624B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0198211A (en) | 1989-04-17 |
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