JPH0748460B2 - Electrolytic solution for electrolytic capacitors - Google Patents
Electrolytic solution for electrolytic capacitorsInfo
- Publication number
- JPH0748460B2 JPH0748460B2 JP2131752A JP13175290A JPH0748460B2 JP H0748460 B2 JPH0748460 B2 JP H0748460B2 JP 2131752 A JP2131752 A JP 2131752A JP 13175290 A JP13175290 A JP 13175290A JP H0748460 B2 JPH0748460 B2 JP H0748460B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic
- electrolytic solution
- solution
- boric acid
- capacitors
- 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
- 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、電解コンデンサ用電解液に関し、特に難燃性
を改良した中高圧用の電解コンデンサ用電解液に関す
る。Description: TECHNICAL FIELD The present invention relates to an electrolytic solution for an electrolytic capacitor, and more particularly to an electrolytic solution for an intermediate-voltage electrolytic capacitor with improved flame retardancy.
（従来の技術） 従来の中高圧用アルミ電解コンデンサに用いられる電解
液は、エチレングリコールを主溶媒とし、これにホウ酸
やホウ酸アンモニウムを溶解した成分となっている。(Prior Art) An electrolytic solution used in a conventional medium- and high-voltage aluminum electrolytic capacitor has ethylene glycol as a main solvent and boric acid or ammonium borate dissolved therein.
このエチレングリコール−ホウ酸系の電解液は、エステ
ル化反応によって生じる縮合水のために多量の水分を生
成し、難燃性を有している。This ethylene glycol-boric acid-based electrolytic solution has a large amount of water due to condensed water generated by the esterification reaction, and has flame retardancy.
（発明が解決しようとする課題） しかし、この従来の電解液は、100℃よりも高い温度で
使用すると、ガスを多量に発生し、電解コンデンサに設
けられている防爆弁が作動し易く、短時間で不良となる
欠点がある。(Problems to be solved by the invention) However, when this conventional electrolytic solution is used at a temperature higher than 100 ° C, a large amount of gas is generated, and the explosion-proof valve provided in the electrolytic capacitor is easy to operate, It has the drawback of becoming defective in time.
このガス発生を防止するために、エチレングリコールに
有機酸を溶解した成分の電解液を用いることがある。し
かし、この電解液は、電解コンデンサが過電圧を印加さ
れたり、パンクした際に発生するスパークにより容易に
着火し、燃焼するという欠点がある。In order to prevent this gas generation, an electrolytic solution of a component obtained by dissolving an organic acid in ethylene glycol may be used. However, this electrolytic solution has a drawback that it is easily ignited and burned by a spark generated when an overvoltage is applied to the electrolytic capacitor or when the electrolytic capacitor is punctured.
本発明は、以上の欠点を改良し、ガス発生を抑制でき、
かつ燃焼し難い電解コンデンサ用電解液を提供すること
を目的とする。The present invention improves the above drawbacks and can suppress gas generation,
Moreover, it is an object of the present invention to provide an electrolytic solution for an electrolytic capacitor that is difficult to burn.
（課題を解決するための手段） 本発明は、上記の目的を達成するために、エチレングリ
コールを主成分とする溶媒に、有機酸あるいはその塩を
溶解した電解コンデンサ用電解液において、部分的にホ
ウ酸およびリン酸でエステル化したポリビニルアルコー
ル（以下ポリビニルアルコール−ホウ酸、リン酸エステ
ルと略す）を溶解することを特徴とする電解コンデンサ
用電解液を提供するものである。(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention partially provides an electrolytic capacitor electrolytic solution in which an organic acid or a salt thereof is dissolved in a solvent containing ethylene glycol as a main component. It is intended to provide an electrolytic solution for an electrolytic capacitor, which is characterized by dissolving polyvinyl alcohol esterified with boric acid and phosphoric acid (hereinafter abbreviated as polyvinyl alcohol-boric acid and phosphoric acid ester).
（作用） エチレングリコール等に有機酸やその塩を溶解している
ために、エチレングリコール−硼酸系電解液に比較し
て、エステル化反応による縮合水がほとんど生じること
なく、水和劣化を生じ難く、ガス発生が抑制される。(Function) Since an organic acid or a salt thereof is dissolved in ethylene glycol or the like, as compared with an ethylene glycol-boric acid-based electrolytic solution, condensed water due to an esterification reaction hardly occurs and hydration deterioration is less likely to occur. , Gas generation is suppressed.
また、ポリビニルアルコール−ホウ酸、リン酸エステル
の一部はポリビニルコールの水素基にホウ酸やリン酸が
反応し、ホウ酸やリン酸が架橋材として作用しそのため
に三次元化して網目構造となる。これにより、電解液は
沸点が上昇し気化し難くなり、ガス発生が抑制される。In addition, polyvinyl alcohol-boric acid, part of the phosphoric acid ester reacts with boric acid or phosphoric acid to the hydrogen groups of polyvinyl chol, and boric acid or phosphoric acid acts as a cross-linking agent, and thus becomes three-dimensional and has a network structure. Become. As a result, the electrolytic solution has a higher boiling point and is less likely to be vaporized, and gas generation is suppressed.
そして架橋によって三次元結合を生じた化合物が気化し
て燃焼するには、これらの化合物の原子間の結合を切断
して低分子化合物に分解しなければならず、その切断の
ために大きなエネルギーを必要とする。そのために、ス
パーク等が生じて、そのエネルギーの大部分はこの分解
のために費やされ、気化した物質を燃焼させ難くなる。Then, in order for the compound that has generated a three-dimensional bond due to cross-linking to vaporize and burn, the bonds between the atoms of these compounds must be broken and decomposed into low-molecular compounds, and a large amount of energy is required for the breaking. I need. Therefore, a spark or the like is generated, most of the energy is spent for this decomposition, and it becomes difficult to burn the vaporized substance.
さらに、ポリビニルアルコールホウ酸、リン酸エステル
には、熱分解によって生じる低分子化合物を炭素と水に
分解する炭化を生じ易くし、燃焼性を高める作用があ
る。Furthermore, polyvinyl alcohol boric acid and phosphoric acid ester have an effect of facilitating carbonization, which decomposes a low-molecular compound generated by thermal decomposition into carbon and water, and has an effect of enhancing combustibility.
なお、ポリビニルアルコール−ホウ酸、リン酸エステル
の一部が三次元網目構造を有しているために、イオンの
移動を妨げる作用は少なく、比抵抗はほとんど増大しな
い。In addition, since polyvinyl alcohol-boric acid and a part of phosphoric acid ester have a three-dimensional network structure, the effect of hindering the movement of ions is small and the specific resistance hardly increases.
また、三次元網目構造を有するこの電解液は高温度でも
電解紙により保持されるため、信頼性が高い。Further, this electrolytic solution having a three-dimensional network structure is highly reliable because it is held by electrolytic paper even at high temperatures.
（実施例） 以下、本発明を実施例に基づいて説明する。(Example) Hereinafter, the present invention will be described based on examples.
主溶媒としてはエチレングリコールを用い、これに、安
息香酸アンモニウムや1,6−デカンジカルボン酸アンモ
ニウム、アゼライン酸アンモニウム、セバシン酸アンモ
ニウム等を溶質として溶解する。そしてこの溶媒及び溶
質からなる溶液にポリビニルアルコール−ホウ酸、リン
酸エステルを溶解する。Ethylene glycol is used as a main solvent, and ammonium benzoate, ammonium 1,6-decanedicarboxylate, ammonium azelaate, ammonium sebacate and the like are dissolved as solutes in the ethylene glycol. Then, polyvinyl alcohol-boric acid and phosphoric acid ester are dissolved in a solution composed of this solvent and solute.
次に、本発明の実施例と従来例について、表の通りの成
分比の電解液として比抵抗及び火花電圧を測定した。Next, with respect to the examples of the present invention and the conventional example, the specific resistance and the spark voltage were measured as the electrolytic solutions having the component ratios shown in the table.
表によれば、溶媒及び溶質に同じ物質を用いた実施例１
と従来例１、実施例２と従来例２、実施例３と従来例
３、実施例４と従来例４を各々比べると、比抵抗及び火
花電圧がほぼ同じ値を示している。 According to the table, Example 1 using the same substance as the solvent and solute
When comparing the conventional example 1, the example 2 and the conventional example 2, the example 3 and the conventional example 3, and the example 4 and the conventional example 4, respectively, the specific resistance and the spark voltage show substantially the same values.
また、実施例１と従来例１の電解液を定格250V、10,000
μＦの電解コンデンサの含浸液として用い、実施例２〜
実施例４及び従来例２〜従来例４の電解液を定格400V、
4,700μＦの電解液の含浸液として用いる。そしてこれ
等の電解コンデンサを各10ケづつ、過電圧を印加して破
壊状況を調査した。、試験条件は、定格電圧250Vの電解
コンデンサに対しては電圧400Vを印加し、定格電圧400V
のそれに対しては電圧600Vを印加し、各々電流30Aを流
す。In addition, the electrolytic solutions of Example 1 and Conventional Example 1 were rated at 250 V and 10,000
It is used as an impregnating solution for a μF electrolytic capacitor, and
The electrolytes of Example 4 and Conventional Examples 2 to 4 were rated at 400V,
Used as an impregnating solution of 4,700 μF electrolytic solution. An overvoltage was applied to each of these electrolytic capacitors, and the breakdown status was investigated. The test condition is that the rated voltage of 400V is applied to the electrolytic capacitor with the rated voltage of 250V.
A voltage of 600 V is applied to that, and a current of 30 A is applied to each.
結果は、試験に用いた全部の電解コンデンサのキャップ
が破壊した。そして実施例１〜実施例４の電解液を含浸
した電解コンデンサは全数白煙を発生するが、発火燃焼
はしなかった。しかし、従来例１〜従来例４の電解液を
含浸した電解コンデンサは全数が発火燃焼した。The result was that the caps of all electrolytic capacitors used in the test were broken. The electrolytic capacitors impregnated with the electrolytic solutions of Examples 1 to 4 generated 100% white smoke, but did not ignite and burn. However, all electrolytic capacitors impregnated with the electrolytic solutions of Conventional Example 1 to Conventional Example 4 ignited and burned.
（発明の効果） 以上の通り、本発明によれば、ポリビニルアルコール−
ホウ酸、リン酸エステルを溶解することにより、難燃性
を向上できるとともにガス発生を抑制できる電解コンデ
ンサ用電解液が得られ、電解コンデンサの信頼性を向上
できる。(Effects of the Invention) As described above, according to the present invention, polyvinyl alcohol-
By dissolving boric acid and phosphoric acid ester, an electrolytic solution for an electrolytic capacitor that can improve flame retardancy and suppress gas generation can be obtained, and reliability of the electrolytic capacitor can be improved.
Claims (1)
に、有機酸あるいはその塩を溶解した電解コンデンサ用
電解液において、部分的にホウ酸およびリン酸でエステ
ル化したポリビニルアルコールを溶解することを特徴と
する電解コンデンサ用電解液。1. A polyvinyl alcohol partially esterified with boric acid and phosphoric acid in an electrolytic solution for an electrolytic capacitor in which an organic acid or a salt thereof is dissolved in a solvent containing ethylene glycol as a main component. An electrolytic solution for electrolytic capacitors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2131752A JPH0748460B2 (en) | 1990-05-22 | 1990-05-22 | Electrolytic solution for electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2131752A JPH0748460B2 (en) | 1990-05-22 | 1990-05-22 | Electrolytic solution for electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0426107A JPH0426107A (en) | 1992-01-29 |
| JPH0748460B2 true JPH0748460B2 (en) | 1995-05-24 |
Family
ID=15065363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2131752A Expired - Lifetime JPH0748460B2 (en) | 1990-05-22 | 1990-05-22 | Electrolytic solution for electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0748460B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2915024B2 (en) * | 1989-11-09 | 1999-07-05 | 汪芳 白井 | Electrolyte for electrolytic capacitors |
-
1990
- 1990-05-22 JP JP2131752A patent/JPH0748460B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0426107A (en) | 1992-01-29 |
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