JPH0754789B2 - Electrolytic solution for driving aluminum electrolytic capacitors - Google Patents
Electrolytic solution for driving aluminum electrolytic capacitorsInfo
- Publication number
- JPH0754789B2 JPH0754789B2 JP62055700A JP5570087A JPH0754789B2 JP H0754789 B2 JPH0754789 B2 JP H0754789B2 JP 62055700 A JP62055700 A JP 62055700A JP 5570087 A JP5570087 A JP 5570087A JP H0754789 B2 JPH0754789 B2 JP H0754789B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic solution
- salt
- driving
- electrolytic capacitor
- 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)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Secondary Cells (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明はアルミニウム電解コンデンサの駆動用電解液に
関するものである。TECHNICAL FIELD The present invention relates to an electrolytic solution for driving an aluminum electrolytic capacitor.
従来の技術 従来、アルミニウム電解コンデンサの駆動用電解液（以
下電解液という）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またはその塩を溶解した電解液が
多用されている。2. Description of the Related Art Conventionally, as a driving electrolytic solution (hereinafter referred to as an electrolytic solution) for an aluminum electrolytic capacitor, an electrolytic solution in which adipic acid or a salt thereof is dissolved in a solvent mainly containing ethylene glycol is often used.
発明の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小型化、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。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。また、
溶質量を増大させると静電溶量や損失の低温特性が悪化
するなどの問題があった。Problems to be Solved by the Invention In recent years, with the downsizing and high reliability of aluminum electrolytic capacitors, an electrolytic solution having a low specific resistance and stable at a wide temperature is required. In order to lower the specific resistance, there are some that have conventionally increased the water content in the electrolytic solution or the dissolved mass, but if the water content is increased, the reliability in high temperature atmosphere decreases significantly. To do. Also,
There is a problem that the low temperature characteristics such as the amount of electrostatic dissolution and loss are deteriorated when the amount of dissolved metal is increased.
問題点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、酸アミドとエ
チレングリコールとからなる混合溶媒に、フタル酸モノ
メチルアンモニウム塩、ジメチルアンモニウム塩、もし
くはトリメチルアンモニウム塩のうち１種または２種以
上を溶解したことを特徴とする電解液である。Means for Solving the Problems In order to solve the above-mentioned problems, one of a monomethylammonium salt of phthalic acid, a dimethylammonium salt, or a trimethylammonium salt is added to a mixed solvent of acid amide and ethylene glycol. It is an electrolytic solution in which one kind or two or more kinds are dissolved.
作用 本発明に係わる電解液は溶質の溶解度が著しく高く、比
抵抗が極めて低くなる。また、低温においても溶質の析
出がなく、溶媒の粘度変化も著しく小さいため、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も著
しく向上する。Action The electrolyte according to the present invention has extremely high solubility of solute and extremely low specific resistance. In addition, since the solute does not precipitate even at low temperatures and the viscosity change of the solvent is extremely small, the low-temperature characteristics of the capacitance and loss of the aluminum electrolytic capacitor are significantly improved.
実施例 以下、本発明の実施例について説明する。Examples Examples of the present invention will be described below.
第１表は電解液組成と温度０℃および−55℃における電
解液の比抵抗値およびpH値を示す。Table 1 shows the composition of the electrolytic solution and the specific resistance value and pH value of the electrolytic solution at temperatures of 0 ° C and -55 ° C.
そして上記フタル酸のアルキルアンモニウム塩の実施例
として用いた溶質の薬品名および構造式は下記のもので
ある。The chemical names and structural formulas of solutes used as examples of the alkyl ammonium salt of phthalic acid are as follows.
（イ）フタル酸モノメチルアンモニウム （ロ）フタル酸ジメチルアンモニウム （ハ）フタル酸トリメチルアンモニウム （ニ）フタル酸テトラメチルアンモニウム 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。(A) Monomethylammonium phthalate (B) Dimethyl ammonium phthalate (C) Trimethylammonium phthalate (D) Tetramethylammonium phthalate 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.
また、第２表は、第１表に示す電解液を用いて製作した
定格10WV、100μＦの電解コンデンサの静電容量および
損失角の正接の温度変化特性を示し、本発明の電解液試
料記号A,B,Cは従来品の電解液Ｄに比較して低温におけ
る電解コンデンサ特性が著しく改善されている。Table 2 shows the temperature change characteristics of the tangent of the capacitance and loss tangent of an electrolytic capacitor rated at 10 WV and 100 μF manufactured using the electrolytic solution shown in Table 1, and shows the electrolytic solution sample symbol A of the present invention. In comparison with the conventional electrolytic solution D, B, C, and C have significantly improved electrolytic capacitor characteristics at low temperatures.
第３表は第２表で用いた電解コンデンサと同様に製作し
た定格10WV、100μＦの電解コンデンサを105℃で定格電
圧印加の高温負荷試験を行った結果を示す。なお、漏れ
電流は定格電圧印加１分後の値を示し、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 high temperature load test at 105 ° C with a rated voltage applied to an electrolytic capacitor rated at 10 WV and 100 µF, which was manufactured in the same manner as the electrolytic capacitor used in Table 2. The leakage current shows a value one minute after the rated voltage is applied, and 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を用いた本発明に係
る電解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 electrolytic capacitors according to the present invention using the electrolytic solutions A, B and C have a small capacity change rate and a small loss change even in a high temperature load test and give excellent durability.
尚、上述の混合溶媒は酸アミド95〜20wt％とエチレング
リコール５〜80wt％からなることが好ましく、最適比は
前者が80wt％、後者が20wt％である。The above mixed solvent preferably comprises 95 to 20 wt% of acid amide and 5 to 80 wt% of ethylene glycol, and the optimum ratio is 80 wt% for the former and 20 wt% for the latter.
エチレングリコール5wt％未満では高温負荷試験での特
性変化が大となり、80wt％を超えると低温での容量変化
率や損失変化が大きくなる。If the ethylene glycol is less than 5 wt%, the characteristic change in the high temperature load test becomes large, and if it exceeds 80 wt%, the capacity change rate and the loss change at the low temperature become large.
また溶質の添加量は溶媒100gに対し5g以上が好ましく、
5g未満では比抵抗を十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 solute added is preferably 5 g or more with respect to 100 g of the solvent,
If it is less than 5 g, the specific resistance cannot be sufficiently reduced.
In addition, it is not preferable that the addition amount exceeds the saturation concentration.
発明の効果 以上の結果から明らかなように、酸アミドとエチレング
リコールとからなる混合溶媒に、フタル酸モノメチルア
ンモニウム塩、ジメチルアンモニウム塩、若しくはトリ
メチルアンモニウム塩を溶媒したアルミニウム電解コン
デンサの駆動用電解液を用いた電解コンデンサは、広温
度範囲で優れた特性を示し、かつ信頼性を著しく向上さ
せることができ、工業的ならびに実用的価値の大なるも
のである。EFFECTS OF THE INVENTION As is clear from the above results, a mixed solvent consisting of acid amide and ethylene glycol is mixed with a driving electrolytic solution for an aluminum electrolytic capacitor in which monomethylammonium phthalate, dimethylammonium salt, or trimethylammonium salt is used as a solvent. The electrolytic capacitor used has excellent characteristics in a wide temperature range and can significantly improve reliability, and has great industrial and practical value.
Claims (4)
合溶媒に、フタル酸のモノメチルアンモニウム塩、ジメ
チルアンモニウム塩、若しくはトリメチルアンモニウム
塩のうち１種または２種以上を溶解したことを特徴とす
るアルミニウム電解コンデンサの駆動用電解液。1. An aluminum electrolytic capacitor characterized in that one or more of monomethylammonium salt, dimethylammonium salt or trimethylammonium salt of phthalic acid are dissolved in a mixed solvent consisting of acid amide and ethylene glycol. Electrolyte for driving.
チレングリコール５〜80wt％からなることを特徴とする
特許請求の範囲第１項記載のアルミニウム電解コンデン
サの駆動用電解液。2. The driving electrolytic solution for an aluminum electrolytic capacitor according to claim 1, wherein the mixed solvent comprises 95 to 20 wt% of acid amide and 5 to 80 wt% of ethylene glycol.
ド、Ｎ−メチルホルムアミド、Ｎ、Ｎ−ジエチルホルム
アミド、Ｎ−エチルホルムアミド、Ｎ、Ｎ−ジメチルア
セトアミド、Ｎ−メチルアセトアミド、Ｎ、Ｎ−ジエチ
ルアセトアミド、Ｎ−エチルアセトアミドからなること
を特徴とする特許請求の範囲第１項または第２項記載の
アルミニウム電解コンデンサの駆動用電解液。3. The acid amide is N, N-dimethylformamide, N-methylformamide, N, N-diethylformamide, N-ethylformamide, N, N-dimethylacetamide, N-methylacetamide, N, N-diethyl. The electrolytic solution for driving an aluminum electrolytic capacitor according to claim 1 or 2, wherein the electrolytic solution comprises acetamide and N-ethylacetamide.
塩、ジメチルアンモニウム塩、若しくはトリメチルアン
モニウム塩のうち１種または２種以上を組合せた全量が
混合溶媒100gに対し、5g以上存在することを特徴とする
特許請求の範囲第１項記載のアルミニウム電解コンデン
サの駆動用電解液。4. A patent characterized in that the total amount of one or more of phthalic acid monomethylammonium salt, dimethylammonium salt or trimethylammonium salt combined is 5 g or more per 100 g of mixed solvent. An electrolytic solution for driving an aluminum electrolytic capacitor according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62055700A JPH0754789B2 (en) | 1987-03-11 | 1987-03-11 | Electrolytic solution for driving aluminum electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62055700A JPH0754789B2 (en) | 1987-03-11 | 1987-03-11 | Electrolytic solution for driving aluminum electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63222414A JPS63222414A (en) | 1988-09-16 |
| JPH0754789B2 true JPH0754789B2 (en) | 1995-06-07 |
Family
ID=13006170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62055700A Expired - Fee Related JPH0754789B2 (en) | 1987-03-11 | 1987-03-11 | Electrolytic solution for driving aluminum electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0754789B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6369213A (en) * | 1986-09-11 | 1988-03-29 | 旭硝子株式会社 | Electrolytic capacitor |
-
1987
- 1987-03-11 JP JP62055700A patent/JPH0754789B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63222414A (en) | 1988-09-16 |
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Legal Events
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| R250 | Receipt of annual fees |
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