JPH0770444B2 - Electrolytic solution for driving electrolytic capacitors - Google Patents
Electrolytic solution for driving electrolytic capacitorsInfo
- Publication number
- JPH0770444B2 JPH0770444B2 JP2160467A JP16046790A JPH0770444B2 JP H0770444 B2 JPH0770444 B2 JP H0770444B2 JP 2160467 A JP2160467 A JP 2160467A JP 16046790 A JP16046790 A JP 16046790A JP H0770444 B2 JPH0770444 B2 JP H0770444B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic
- electrolytic solution
- driving
- diglycerin
- generation voltage
- 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 - Lifetime
Links
Landscapes
- Secondary Cells (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は電解コンデンサに係わり、特に火花電圧の高い
電解コンデンサ駆動用電解液に関する。Description: TECHNICAL FIELD The present invention relates to an electrolytic capacitor, and more particularly to an electrolytic solution for driving an electrolytic capacitor having a high spark voltage.
（従来の技術） 従来、中高圧用の電解コンデンサ駆動用電解液（以下電
解液と称する）としては、エチレングリコールを主体と
した溶媒にホウ酸とアンモニア水またはホウ酸のアンモ
ニア塩等を溶解したものが使われてきたが、最近ではブ
チルオクタン二酸、アゼライン酸、アジピン酸等の脂肪
酸カルボン酸または安息香酸、フタル酸等の芳香族カル
ボン酸ないしはその塩も使用されるようになってきてい
る。(Prior Art) Conventionally, as an electrolytic solution for driving a medium- and high-voltage electrolytic capacitor (hereinafter referred to as an electrolytic solution), boric acid and aqueous ammonia or an ammonium salt of boric acid are dissolved in a solvent mainly composed of ethylene glycol. However, fatty acid carboxylic acids such as butyloctanedioic acid, azelaic acid and adipic acid, or aromatic carboxylic acids such as benzoic acid and phthalic acid or salts thereof have come to be used recently. .
また、低圧高信頼性用の電解液としてはγ−ブチロラク
トンを主体とした溶媒に、マレイン酸やフタル酸等のカ
ルボン酸またはそれらのアミン塩や４級アンモニウム塩
を溶解したものが開発されてきた。In addition, as a low-pressure high-reliability electrolytic solution, a solution in which a carboxylic acid such as maleic acid or phthalic acid or an amine salt or quaternary ammonium salt thereof is dissolved in a solvent mainly composed of γ-butyrolactone has been developed. .
（発明が解決しようとする課題） ホウ酸系電解液は火花発生電圧を高くすることは可能で
あるが、粘度や比抵抗が高くなってしまうという欠点が
ある。また、105℃といった高温で使用するとエステル
化が起こり多量の水が形成されるため、電極箔と反応を
起こし、弁作動等の不具合が生じるので、高温での使用
が困難であった。(Problems to be Solved by the Invention) Although the boric acid-based electrolytic solution can increase the spark generation voltage, it has the drawback of increasing the viscosity and the specific resistance. Further, when used at a high temperature such as 105 ° C., esterification occurs and a large amount of water is formed, which reacts with the electrode foil and causes problems such as valve operation, which makes it difficult to use at high temperatures.
一方、有機酸系電解液は逆に粘度や比抵抗を低くするこ
とはできるものの、火花発生電圧や耐腐食性の制約から
450WV以上の高圧で使用することは困難であった。On the other hand, although the organic acid electrolyte can lower the viscosity and the specific resistance on the contrary, it is restricted by the spark generation voltage and the corrosion resistance.
It was difficult to use at a high voltage of 450 WV or higher.
また、低圧のγ−ブチロラクトン系電解液においては火
花発生電圧をあげることがむずかしく、100WV以上に使
用することができなかった。Further, it was difficult to increase the spark generation voltage in the low-pressure γ-butyrolactone-based electrolytic solution, and it was not possible to use it at 100 WV or more.
本発明は上述の問題点に鑑みてなされたものであり、火
花発生電圧を高め高温での信頼性を向上させた電解コン
デンサ駆動用電解液を提供することを目的とする。The present invention has been made in view of the above problems, and an object of the present invention is to provide an electrolytic solution for driving an electrolytic capacitor, which has an increased spark generation voltage and improved reliability at high temperatures.
（課題を解決するための手段） 上記目的による本発明では、有機溶媒と溶質とからなる
電解液に、ジグリセリンポリオキシアルキレンエステル
を添加したことを特徴とする。ジグリセリンポリオキシ
アルキレンエステルの添加量は0.5〜30wt％が好まし
い。(Means for Solving the Problem) The present invention according to the above object is characterized in that a diglycerin polyoxyalkylene ester is added to an electrolytic solution containing an organic solvent and a solute. The amount of diglycerin polyoxyalkylene ester added is preferably 0.5 to 30 wt%.
前記溶媒としては、エチレングリコールを主体としたも
のあるいはγ−ブチロラクトンを主体としたものが好適
である。As the solvent, those mainly containing ethylene glycol or those mainly containing γ-butyrolactone are preferable.
ここで、ジグリセリンポリオキシアルキレンエステルは
グリセリン１モルに対し任意のモル数（実用的には２〜
200モル）のポリオキシエチレン（POE）若しくはポリオ
キシプロピレン（POP）またはこれらの共重合体あるい
は混合物をエステル化させたものである。Here, the diglycerin polyoxyalkylene ester is an arbitrary number of moles (practically 2 to 1 mole) with respect to 1 mole of glycerin.
200 mol) of polyoxyethylene (POE) or polyoxypropylene (POP), or a copolymer or mixture of these is esterified.
（作用） ジグリセリンポリオキシアルキレンエステルはグリセリ
ンよりも分子量が大きいため、電極箔の酸化皮膜表面に
付着することにより、絶縁破壊を抑制するため火花発生
電圧が上昇するものと考えられる。(Function) Since the molecular weight of diglycerin polyoxyalkylene ester is larger than that of glycerin, it is considered that the spark generation voltage is increased because it adheres to the surface of the oxide film of the electrode foil and suppresses dielectric breakdown.
（実施例） 以下、実施例に基づいて本発明を詳細に説明する。(Examples) Hereinafter, the present invention will be described in detail based on Examples.
第１表に、従来例及び本発明による実施例の電解液の特
性を示した。従来例１はホウ酸系電解液であり、火花発
生電圧は高いが比抵抗も高くなってしまう。従来例２お
よび３は有機酸系電解液であり、比抵抗は低くできる
が、火花発生電圧が低下してしまう。また、溶質量も多
くできなかった。従来例４は、副溶媒としてグリセリン
を使用して火花発生電圧を上げた例である。これに対し
て、実施例１および２はそれぞれ従来例２および３に対
してジグリセリンポリオキシプロピレンエステルを添加
した場合であり、50〜55V程火花発生電圧を上昇させる
ことができる。実施例３は従来例４に対抗して、有機酸
系でジグリセリンポリオキシプロピレンエステルおよび
ジグリセリンポリオキシエチレンエステルを添加して比
抵抗と火花発生電圧を同じになるよう調整した例であ
る。Table 1 shows the characteristics of the electrolytic solutions of the conventional example and the example according to the present invention. Conventional Example 1 is a boric acid-based electrolytic solution, which has a high spark generation voltage but also a high specific resistance. Conventional examples 2 and 3 are organic acid electrolytes, and although the specific resistance can be reduced, the spark generation voltage is reduced. Moreover, the melt mass could not be increased. Conventional Example 4 is an example in which glycerin is used as an auxiliary solvent to increase the spark generation voltage. On the other hand, Examples 1 and 2 are cases in which diglycerin polyoxypropylene ester was added to Conventional Examples 2 and 3, respectively, and the spark generation voltage could be increased by about 50 to 55V. In contrast to Conventional Example 4, Example 3 is an example in which diglycerin polyoxypropylene ester and diglycerin polyoxyethylene ester were added in an organic acid system so that the specific resistance and the spark generation voltage were adjusted to be the same.
第２表には、γ−ブチロラクトン系の従来例および実施
例の比較を示した。やはりジグリセリンポリオキシプロ
ピレンエステルを添加することによって火花発生電圧を
上昇させることができる。 Table 2 shows a comparison between the γ-butyrolactone-based conventional examples and the examples. The spark generation voltage can be increased by adding diglycerin polyoxypropylene ester.
次に、従来例４、実施例３および４の電解液を使用して
450V100μＦの電解コンデンサを作製し、105℃で2000時
間の負荷試験を行った結果を第３表に示した。従来例４
については全数ガス発生のため弁作動してしまったが、
実施例３および４は良好な結果であった。また、本実施
例は溶質量も多いため、腐食も発生しなかった。 Next, using the electrolytic solutions of Conventional Example 4, Examples 3 and 4,
Table 3 shows the results of a load test conducted at 105 ° C. for 2000 hours by producing an electrolytic capacitor of 450 V and 100 μF. Conventional example 4
As for the above, all valves were activated due to gas generation,
Examples 3 and 4 gave good results. Further, in this example, since the mass of melt was large, corrosion did not occur.
なお、本実施例で用いたジグリセリンポリオキシプロピ
レンエステルはジグリセリン１モルに対するプロピレン
オキシドが９モルのものであり粘度は620Cpであった。
また、ジグリセリンポリオキシエチレンエステルはジグ
リセリン１モルに対するエチレンオキシドが13モルのも
のであり粘度は510Cpであった。 The diglycerin polyoxypropylene ester used in this example had 9 mol of propylene oxide per 1 mol of diglycerin and a viscosity of 620 Cp.
The diglycerin polyoxyethylene ester had 13 mol of ethylene oxide per 1 mol of diglycerin and a viscosity of 510 Cp.
ジグリセリンポリオキシアルキレンエステルの添加量と
しては、0.5wt％より少ないと火花発生電圧に対する効
果がなく、30wt％を超えると比抵抗が増加してきてしま
うため、0.5〜30wt％が好ましい。If the amount of diglycerin polyoxyalkylene ester added is less than 0.5 wt%, there is no effect on the spark generation voltage, and if it exceeds 30 wt%, the specific resistance increases, so 0.5-30 wt% is preferable.
（発明の効果） 以上述べたように、本発明によれば火花発生電圧を上昇
させることができ、高温でも安定な電解液を提供するこ
とができる。(Effects of the Invention) As described above, according to the present invention, the spark generation voltage can be increased and a stable electrolytic solution can be provided even at high temperatures.
Claims (4)
リセリンポリオキシアルキレンエステルを添加したこと
を特徴とする電解コンデンサ駆動用電解液。1. An electrolytic solution for driving an electrolytic capacitor, wherein diglycerin polyoxyalkylene ester is added to an electrolytic solution containing an organic solvent and a solute.
ルの添加量が0.5〜30wt％であることを特徴とする請求
項１記載の電解コンデンサ駆動用電解液。2. The electrolytic solution for driving an electrolytic capacitor according to claim 1, wherein the amount of diglycerin polyoxyalkylene ester added is 0.5 to 30 wt%.
体とするものであることを特徴とする請求項１または２
記載の電解コンデンサ駆動用電解液。3. The organic solvent mainly comprises ethylene glycol.
The electrolytic solution for driving the electrolytic capacitor described.
体とするものであることを特徴とする請求項１または２
記載の電解コンデンサ駆動用電解液。4. The organic solvent mainly comprises .gamma.-butyrolactone.
The electrolytic solution for driving the electrolytic capacitor described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2160467A JPH0770444B2 (en) | 1990-06-19 | 1990-06-19 | Electrolytic solution for driving electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2160467A JPH0770444B2 (en) | 1990-06-19 | 1990-06-19 | Electrolytic solution for driving electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0451510A JPH0451510A (en) | 1992-02-20 |
| JPH0770444B2 true JPH0770444B2 (en) | 1995-07-31 |
Family
ID=15715580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2160467A Expired - Lifetime JPH0770444B2 (en) | 1990-06-19 | 1990-06-19 | Electrolytic solution for driving electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0770444B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022092244A1 (en) | 2020-10-29 | 2022-05-05 | ダウ・東レ株式会社 | Curable fluorosilicone composition |
| WO2022092245A1 (en) | 2020-10-29 | 2022-05-05 | ダウ・東レ株式会社 | Curable fluorosilicone composition |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3285991B2 (en) * | 1993-02-23 | 2002-05-27 | ルビコン株式会社 | Electrolytic solution for driving electrolytic capacitor and electrolytic capacitor using the same |
| JP6619573B2 (en) * | 2015-07-03 | 2019-12-11 | 阪本薬品工業株式会社 | Electrolytic solution for aluminum electrolytic capacitor and aluminum electrolytic capacitor using the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2925185B2 (en) * | 1989-10-27 | 1999-07-28 | 日本ケミコン株式会社 | Electrolyte for electrolytic capacitors |
-
1990
- 1990-06-19 JP JP2160467A patent/JPH0770444B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022092244A1 (en) | 2020-10-29 | 2022-05-05 | ダウ・東レ株式会社 | Curable fluorosilicone composition |
| WO2022092245A1 (en) | 2020-10-29 | 2022-05-05 | ダウ・東レ株式会社 | Curable fluorosilicone composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0451510A (en) | 1992-02-20 |
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