JP3393673B2 - Electrolyte for driving electrolytic capacitors - Google Patents
Electrolyte for driving electrolytic capacitorsInfo
- Publication number
- JP3393673B2 JP3393673B2 JP09723993A JP9723993A JP3393673B2 JP 3393673 B2 JP3393673 B2 JP 3393673B2 JP 09723993 A JP09723993 A JP 09723993A JP 9723993 A JP9723993 A JP 9723993A JP 3393673 B2 JP3393673 B2 JP 3393673B2
- Authority
- JP
- Japan
- Prior art keywords
- acid
- methyl
- electrolyte
- driving
- salts
- 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)
- Electric Double-Layer Capacitors Or The Like (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、電解コンデンサ駆動用
電解液に関するもので、特に中高圧用電解コンデンサの
特性改善に関するものである。
【０００２】
【従来の技術】一般に、電解コンデンサの駆動用電解液
において、特に中高圧用としては、エチレングリコール
を溶媒とし、ホウ酸又はホウ酸アンモニウムを溶質とし
たものが用いられていた。しかし、この種の電解液は、
エチレングリコールとホウ酸の間で起こるエステル化反
応によって生ずる水分のため、１００℃を超える電解コ
ンデンサに使用すると、電解液の水分が水蒸気となり、
電解コンデンサのパッケージ内圧が上昇し、これを破壊
させてしまうという問題があった。
【０００３】そのため、このような問題を解決する技術
として、エチレングリコールに１，８−オクタンジカル
ボン酸又は１，１０−デカンジカルボン酸などの有機カ
ルボン酸の塩を用いることも試みられている。しかしな
がら、これらの塩を用いた電解液ではエステル化による
水分の発生は抑制できるものの、溶解度が低いために低
い比抵抗が得られず、低温では粘度の上昇や溶質の析出
があり、十分に満足な特性が得られなかった。
【０００４】
【発明が解決しようとする課題】以上述べたように、エ
チレングリコールにホウ酸やホウ酸アンモニウムを溶質
として用いた駆動用電解液では、１００℃を超える高温
での化学的安定性に問題があり、また、１，８−オクタ
ンジカルボン酸又は１，１０−デカンジカルボン酸など
の有機カルボン酸の塩を用いた電解液では、十分な比抵
抗が得られず、低温特性も悪いという欠点を有し、実用
上解決すべき課題をもつものであった。
【０００５】本発明は、上記の問題を解決するために成
されたものであり、その目的は、高温時における電解コ
ンデンサの内圧上昇を抑制し、且つ、溶解度を上げるこ
とで比抵抗を低下させ、低温特性も優れた中高圧用に適
した電解コンデンサ駆動用電解液を提供することであ
る。
【０００６】
【課題を解決するための手段】本発明による電解コンデ
ンサ駆動用電解液は、エチレングリコールを主体とした
溶媒に、
４−メチル−１，８−オクタンジカルボン酸
５−メチル−１，９−ノナンジカルボン酸
５−メチル−１，１０−デカンジカルボン酸
６−メチル−１，１１−ウンデカンジカルボン酸
６−メチル−１，１２−ドデカンジカルボン酸
７−メチル−１，１３−トリデカンジカルボン酸
８−メチル−１，１５−ペンタデカンジカルボン酸
８−メチル−１，１６−ヘキサデカンジカルボン酸
９−メチル−１，１７−ヘプタデカンジカルボン酸
９−メチル−１，１８−オクタデカンジカルボン酸
のうちから選択した酸又はその塩の中の少なくとも１種
を主たる溶質として溶解することを特徴とするものであ
る。
【０００７】また、上記した塩としては、アンモニウム
塩，二級アミン塩，三級アミン塩又は四級アンモニウム
塩の少なくとも１種からなることを特徴とするものであ
る。
【０００８】
【作用】以上のように構成された電解コンデンサ駆動用
電解液によれば、エステル化反応による水分の発生を抑
制し、溶解度を上げることにより比抵抗を低下させるこ
とができ、更に、低温特性の改善に大きく作用する。
【０００９】
【実施例】以下、本発明の実施例につき説明する。すな
わち、本発明に係る駆動用電解液は、エチレングリコー
ルを主体とした溶媒に、
４−メチル−１，８−オクタンジカルボン酸
５−メチル−１，９−ノナンジカルボン酸
５−メチル−１，１０−デカンジカルボン酸
６−メチル−１，１１−ウンデカンジカルボン酸
６−メチル−１，１２−ドデカンジカルボン酸
７−メチル−１，１３−トリデカンジカルボン酸
８−メチル−１，１５−ペンタデカンジカルボン酸
８−メチル−１，１６−ヘキサデカンジカルボン酸
９−メチル−１，１７−ヘプタデカンジカルボン酸
９−メチル−１，１８−オクタデカンジカルボン酸
のうちから選択した酸又はその塩の中の少なくとも１種
を主たる溶質として溶解してなるものである。
【００１０】また、上記した塩としては、アンモニウム
塩，二級アミン塩，三級アミン塩又は四級アンモニウム
塩の少なくとも１種からなるものであり、二級アミン塩
の具体例としては、ジメチルアミン塩，ジエチルアミン
塩などが上げられ、三級塩の具体例としてはトリメチル
アミン塩，トリエチルエミン塩などが上げられ、四級ア
ンモニウム塩としてはテトラメチルアンモニウム塩，テ
トラエチルアンモニウム塩などが上げられる。
【００１１】以上のように構成してなる駆動用電解液に
よれば、エステル化反応による水分の発生を抑制できる
ことはもとより、溶質の溶解度を上げることにより、比
抵抗を大幅に低下させることが可能となり、低温インピ
ーダンス特性改善に大きく貢献すると同時に、高温下に
おいても非常に安定した特性を発揮する。
【００１２】次に、具体的な実施例に基づき、本発明と
従来例との特性比較について述べる。まず、表１に本発
明に係る駆動用電解液の実施例１〜１１と従来技術に係
る駆動用電解液の従来例１〜４の組成構成と、それぞれ
の２５℃での比抵抗及び火花発生電圧を示す。
【００１３】表１から明らかなように、従来例に係る溶
質の添加割合は、１０％までは溶解するが１５％では析
出して使用できないのに対して、実施例に係る溶質の添
加割合は、全て１５％まで使用可能であった。
【００１４】次に、表１に示した従来例１〜２と実施例
１〜１１の駆動用電解液を使用し製作したアルミニウム
電解コンデンサ（定格４００Ｖ−１５０μＦ）の初期値
と高温負荷試験（１０５℃ １０００時間）後の特性を
比較した結果、表２，表３に示す通りであった。
【００１５】
【表１】【００１６】【００１７】【００１８】
【表２】【００１９】
【表３】【００２０】表２〜表３から明らかなように、本発明の
駆動用電解液を用いた実施例１〜１１のものは、従来の
駆動用電解液を用いた従来例１〜２とに比較し、初期段
階でのｔａｎδ及び低温インピーダンス特性も優れ、且
つ１０５℃ １０００時間の高温負荷試験後において
も、静電容量変化率及びｔａｎδ変化が少ない優れた効
果を実証した。
【００２１】
【発明の効果】以上述べたように、本発明の電解コンデ
ンサ駆動用電解液は、溶質の溶解度を上げることにより
比抵抗を低下させることができ、更に低温特性も改善さ
れ、且つ高温でも安定な長寿命の電解コンデンサを提供
することができる。DETAILED DESCRIPTION OF THE INVENTION
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for driving an electrolytic capacitor.
Electrolyte solution, especially for electrolytic capacitors for medium and high pressure
It relates to the improvement of characteristics.
[0002]
2. Description of the Related Art Generally, an electrolytic solution for driving an electrolytic capacitor
In particular, for medium and high pressure, ethylene glycol
With boric acid or ammonium borate as a solute
Was used. However, this type of electrolyte is
Esterification reaction between ethylene glycol and boric acid
Due to the water generated by the reaction,
When used for capacitors, the water in the electrolyte becomes steam,
The internal pressure of the electrolytic capacitor package rises and destroys it
There was a problem of letting them do.
[0003] Therefore, a technology for solving such a problem.
As 1,8-octanedical in ethylene glycol
Organic acids such as boric acid or 1,10-decanedicarboxylic acid
Attempts have also been made to use salts of rubonic acid. But
However, in electrolytes using these salts,
Although the generation of moisture can be suppressed, it is low due to low solubility.
Low specific resistance, increasing viscosity and solute deposition at low temperatures
And satisfactory characteristics were not obtained.
[0004]
SUMMARY OF THE INVENTION As described above,
Boric acid or ammonium borate solute in Tylene glycol
High temperature exceeding 100 ° C for the driving electrolyte used as
Problem with the chemical stability of
Dicarboxylic acid or 1,10-decanedicarboxylic acid
In the electrolyte using the organic carboxylic acid salt of
Practical use, with the drawback that no resistance is obtained and the low-temperature properties are poor.
It had problems to be solved.
The present invention has been made to solve the above problems.
The purpose of this is to
Suppress the internal pressure rise of the capacitor and increase the solubility.
Suitable for medium- and high-pressure applications with low specific resistance and excellent low-temperature characteristics.
To provide an improved electrolytic solution for driving electrolytic capacitors.
You.
[0006]
An electrolytic capacitor according to the present invention is provided.
The electrolyte for driving the sensor is mainly ethylene glycol
In the solvent,
4-methyl-1,8-octanedicarboxylic acid
5-methyl-1,9-nonanedicarboxylic acid
5-methyl-1,10-decanedicarboxylic acid
6-methyl-1,11-undecanedicarboxylic acid
6-methyl-1,12-dodecanedicarboxylic acid
7-methyl-1,13-tridecanedicarboxylic acid
8-methyl-1,15-pentadecanedicarboxylic acid
8-methyl-1,16-hexadecanedicarboxylic acid
9-methyl-1,17-heptadecane dicarboxylic acid
9-methyl-1,18-octadecanedicarboxylic acid
At least one selected from acids or salts thereof selected from
Is dissolved as a main solute.
You.
The above-mentioned salts include ammonium
Salt, secondary amine salt, tertiary amine salt or quaternary ammonium
Characterized by comprising at least one kind of salt
You.
[0008]
[Function] For driving the electrolytic capacitor configured as described above
According to the electrolytic solution, generation of water due to the esterification reaction is suppressed.
To reduce the specific resistance by increasing the solubility.
In addition, it has a great effect on improving low-temperature characteristics.
[0009]
Embodiments of the present invention will be described below. sand
That is, the driving electrolyte solution according to the present invention comprises ethylene glycol.
Solvent mainly composed of
4-methyl-1,8-octanedicarboxylic acid
5-methyl-1,9-nonanedicarboxylic acid
5-methyl-1,10-decanedicarboxylic acid
6-methyl-1,11-undecanedicarboxylic acid
6-methyl-1,12-dodecanedicarboxylic acid
7-methyl-1,13-tridecanedicarboxylic acid
8-methyl-1,15-pentadecanedicarboxylic acid
8-methyl-1,16-hexadecanedicarboxylic acid
9-methyl-1,17-heptadecane dicarboxylic acid
9-methyl-1,18-octadecanedicarboxylic acid
At least one selected from acids or salts thereof selected from
Is dissolved as a main solute.
[0010] The above-mentioned salts include ammonium.
Salt, secondary amine salt, tertiary amine salt or quaternary ammonium
A secondary amine salt comprising at least one kind of salt
Specific examples of dimethylamine salt, diethylamine
Salts, etc., and a specific example of a tertiary salt is trimethyl
Amine salts, triethylamine salts, etc.
As the ammonium salt, tetramethylammonium salt, te
And traethylammonium salts.
The driving electrolyte having the above-mentioned structure is
According to this, generation of water due to the esterification reaction can be suppressed.
In addition, by increasing the solubility of the solute,
Resistance can be greatly reduced,
-Contributes significantly to improving dance characteristics and
It exhibits very stable characteristics.
Next, the present invention will be described based on specific examples.
A comparison of characteristics with the conventional example will be described. First, Table 1
Examples 1 to 11 of the driving electrolyte according to the present invention and the prior art
Composition of the conventional examples 1 to 4 of the driving electrolyte
5 shows the specific resistance and spark generation voltage at 25 ° C.
As is apparent from Table 1, the solution according to the conventional example is
The addition rate of the substance is dissolved up to 10% but precipitated at 15%.
Out of the container so that it cannot be used.
The addition rates were all usable up to 15%.
Next, the conventional examples 1 and 2 shown in Table 1 and the embodiment will be described.
Aluminum manufactured using 1 to 11 driving electrolytes
Initial value of electrolytic capacitor (rated 400V-150μF)
And characteristics after high temperature load test (105 ° C for 1000 hours)
The results of comparison are as shown in Tables 2 and 3.
[0015]
[Table 1][0016][0017][0018]
[Table 2][0019]
[Table 3]As is apparent from Tables 2 and 3, the present invention
Examples 1 to 11 using a driving electrolyte are conventional
Initial stage compared to Conventional Examples 1 and 2 using the driving electrolyte
Excellent tan δ and low temperature impedance characteristics on the floor, and
After a high-temperature load test at 105 ° C for 1000 hours
Also has an excellent effect with little change in capacitance and tan δ.
Demonstrated fruit.
[0021]
As described above, the electrolytic capacitor of the present invention
The electrolyte for driving the sensor is increased by increasing the solubility of the solute.
Specific resistance can be reduced, and low-temperature characteristics are also improved.
Provides stable and long-life electrolytic capacitors even at high temperatures
can do.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01G 9/035 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) H01G 9/035
Claims (1)
を主たる溶質として溶解したことを特徴とする電解コン
デンサ駆動用電解液。(57) [Claims] 1. A solvent mainly composed of ethylene glycol, 4-methyl-1,8-octanedicarboxylic acid 5-methyl-1,9-nonanedicarboxylic acid 5-methyl-1,10-decanedicarboxylic acid 6-methyl-1,11-undecanedicarboxylic acid 6-methyl-1,12-dodecanedicarboxylic acid 7-methyl-1,13-tridecanedicarboxylic acid 8-methyl-1,15-pentadecanedicarboxylic acid 8-methyl-1,16-hexadecanedicarboxylic acid 9-methyl-1,17-heptadecane dicarboxylic acid 9-methyl-1,18-octadecanedicarboxylic acid At least one selected from acids or salts thereof selected from
Characterized by having dissolved as a main solute
Electrolyte for driving a capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09723993A JP3393673B2 (en) | 1993-03-30 | 1993-03-30 | Electrolyte for driving electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09723993A JP3393673B2 (en) | 1993-03-30 | 1993-03-30 | Electrolyte for driving electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06290995A JPH06290995A (en) | 1994-10-18 |
| JP3393673B2 true JP3393673B2 (en) | 2003-04-07 |
Family
ID=14187068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09723993A Expired - Fee Related JP3393673B2 (en) | 1993-03-30 | 1993-03-30 | Electrolyte for driving electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3393673B2 (en) |
-
1993
- 1993-03-30 JP JP09723993A patent/JP3393673B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06290995A (en) | 1994-10-18 |
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