JP2801925B2 - Electrolyte for driving electrolytic capacitors - Google Patents
Electrolyte for driving electrolytic capacitorsInfo
- Publication number
- JP2801925B2 JP2801925B2 JP9850489A JP9850489A JP2801925B2 JP 2801925 B2 JP2801925 B2 JP 2801925B2 JP 9850489 A JP9850489 A JP 9850489A JP 9850489 A JP9850489 A JP 9850489A JP 2801925 B2 JP2801925 B2 JP 2801925B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolyte
- acid
- weight
- salt
- electrolytic 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 - Fee Related
Links
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (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の駆動用電解液（以下電解液
という）に関するものである。Description: TECHNICAL FIELD 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 従来のアルミニウム電解コンデンサの電解液はエチレ
ングリコール、プロピレングリコールなどの多価アルコ
ール類あるいはさらに水を加えたものを溶媒として、ほ
う酸、モノカルボン酸、ジカルボン酸、りん酸または、
これらの塩類を溶解した電解液が多用されている。2. Description of the Related Art The electrolytic solution of a conventional aluminum electrolytic capacitor employs a solvent obtained by adding polyhydric alcohols such as ethylene glycol and propylene glycol or water to a solvent, boric acid, monocarboxylic acid, dicarboxylic acid, phosphoric acid, or
Electrolyte solutions in which these salts are dissolved are frequently used.
発明が解決しようとする問題点 一般にアルミニウム電解コンデンサは、陽極電極とな
るアルミニウム箔に誘導体酸化皮膜を形成したものが用
いられている。Problems to be Solved by the Invention Generally, an aluminum electrolytic capacitor in which a derivative oxide film is formed on an aluminum foil serving as an anode electrode is used.
この皮膜は性質上、微妙な漏れ電流は避けられない
が、さらにこれとは別に陽極電極の引き出し用アルミニ
ウムタブと陽極電極との接合部分の漏れ、電流は、機械
的ストレスを加えただけで著しく増大する。Due to the nature of this film, a delicate leakage current is unavoidable, but in addition to this, leakage and current at the junction between the aluminum tab for extracting the anode electrode and the anode electrode are significantly increased only by applying mechanical stress. Increase.
近年、電子部品の小型化に伴い、この陽極電極と引き
出し用アルミニウムタブとの接合部分に対しては、プリ
ント基板にコンデンサのリード線端子を挿入するときに
もストレスが加わり、またリード線端子を折り曲げ加工
するときにストレスが加わり、漏れ電流が増大するとい
ったことが問題となっている。この欠点を改善する方法
として、封口部に樹脂を塗布することにより、リード線
を固定する方法があるが、製造工程が増加してコスト上
昇の原因となる。In recent years, with the miniaturization of electronic components, stress has been applied to the junction between the anode electrode and the aluminum tab for extraction when inserting the lead terminal of the capacitor into the printed circuit board. A problem arises in that stress is applied during bending and the leakage current increases. As a method of remedying this defect, there is a method of fixing the lead wire by applying a resin to the sealing portion, but this increases the number of manufacturing steps and causes an increase in cost.
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、エチレングリ
コール、エチレングリコールのモノエステル類、Ｎ、Ｎ
−ジメチルホルムアミド、γ−ブチロラクトンの有機溶
媒に、無機、有機の酸または、これらの塩類の一種もし
くは二種以上を溶質として溶解した電解液において、上
記混合量に対して0.05〜5.0重量％のテトラヒドロキシ
安息香酸またはその塩を添加したことを特徴とする電解
コンデンサの電解液である。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides ethylene glycol, monoesters of ethylene glycol, N, N
-In an electrolytic solution in which one or more of an inorganic or organic acid or a salt thereof is dissolved as a solute in an organic solvent of dimethylformamide or γ-butyrolactone, 0.05 to 5.0% by weight of An electrolytic solution for an electrolytic capacitor, characterized by adding hydroxybenzoic acid or a salt thereof.
作用 テトラヒドロキシ安息香酸またはその塩は化成能力が
高く誘導体酸化皮膜の欠陥部をすはやく修復するという
作用を有している。このためリード端子からのストレス
をうけても上記酸化皮膜の欠陥部がすぐに修復されるた
め、リード線加工前後の漏れ電流の変化が極めて少な
い。Action Tetrahydroxybenzoic acid or a salt thereof has a high chemical conversion ability and has an action of quickly repairing a defective portion of a derivative oxide film. For this reason, even if stress is applied from the lead terminals, the defective portion of the oxide film is immediately repaired, and the change in leakage current before and after the processing of the lead wire is extremely small.
実施例 次に本発明の具体的実施例について述べる。第１表
は、γ−ブチロラクトン75重量％、エチレングリコール
10重量％、マレイン酸トリエチルアンモニウム15重量％
からなる電解液（従来品）と、これにテトラヒドロキシ
安息香酸の添加量を変えて調合した電解液試料を製作
し、この電解液を用いて定格50V、4.7μＦ（ケースサイ
ズ直径4mm、長さ7mm）のアルミニウム電解コンデンサを
製作し、漏れ電流制御効果ををリード線部の折り曲げ加
工前および加工後の漏れ電流値により評価した。表中の
漏れ電流は常温、定格電圧印加２分後の値で、いずれも
試料数20個の平均値を示す。なお試料群記号Ｂ、Ｃ、
Ｄ、Ｅ、の場合、γ−ブチロラクトンの量は電解液全量
が100重量％となるよう調合した。Next, specific examples of the present invention will be described. Table 1 shows that 75% by weight of γ-butyrolactone, ethylene glycol
10% by weight, triethylammonium maleate 15% by weight
Electrolyte solution (conventional product) and an electrolyte solution sample prepared by changing the amount of tetrahydroxybenzoic acid added thereto, and using this electrolyte solution, rated 50 V, 4.7 μF (case size diameter 4 mm, length A 7 mm) aluminum electrolytic capacitor was manufactured, and the leakage current control effect was evaluated by the leakage current value before and after bending the lead wire portion. The leakage currents in the table are values at room temperature and after 2 minutes from the application of the rated voltage, and all show the average values of 20 samples. Sample group symbols B, C,
In the cases of D and E, the amount of γ-butyrolactone was adjusted so that the total amount of the electrolyte was 100% by weight.
上述の実施例から明らかなように、本発明のテトラヒ
ドロキシフタル酸またはその塩を添加した本発明の電解
液を用いた電解コンデンサは、漏れ電流の増加が著しく
抑制されている。 As is clear from the above-described examples, in the electrolytic capacitor using the electrolytic solution of the present invention to which the tetrahydroxyphthalic acid of the present invention or a salt thereof is added, the increase in the leakage current is significantly suppressed.
なお、種々の実験の結果より、テトラヒドロキシ安息
香酸またはその塩の添加量が0.05〜5.0重量％であれ
ば、この効果は有効かつ実用上十分である。From the results of various experiments, this effect is effective and practically sufficient when the amount of tetrahydroxybenzoic acid or a salt thereof is 0.05 to 5.0% by weight.
テトラヒドロキシ安息香酸またはその塩は駆動用電解
液に対して5.0重量％を超える量では、高温寿命特性に
おいて静電容量変化率、tanδ変化率が大であり、また
0.05重量％未満ではその効果は充分ではない。When the amount of tetrahydroxybenzoic acid or a salt thereof exceeds 5.0% by weight with respect to the driving electrolyte, the rate of change in capacitance and the rate of change in tanδ in the high-temperature life characteristics are large, and
If the content is less than 0.05% by weight, the effect is not sufficient.
従ってテトラヒドロキシ安息香酸またはその塩の添加
量は、電解液に対して0.05〜5.0重量％が適当である。Therefore, the amount of addition of tetrahydroxybenzoic acid or a salt thereof is suitably 0.05 to 5.0% by weight based on the electrolytic solution.
また、上述の実施例の他エチレングリコール、プロピ
レングリコールなどの多価アルコール類あるいはさらに
水を加えたものを溶媒とし、マレイン酸、フタル酸のア
ンモニウム塩、トリエチルアンモニウム塩、テトラエチ
ルアンモニウム塩など、これらの塩類または二種以上を
溶質とした電解液についても、種々調合比を変えて繰り
返し実験したが、同様な結果が得られた。Further, in addition to the above-described examples, ethylene glycol, polyhydric alcohols such as propylene glycol or those obtained by further adding water as a solvent, maleic acid, ammonium salts of phthalic acid, triethylammonium salts, tetraethylammonium salts, etc. Repeated experiments were also performed on electrolytes using salts or two or more solutes with various mixing ratios, but similar results were obtained.
発明の効果 以上のようにテトラヒドロキシ安息香酸または、その
塩を加えた本発明の電解液は、電解コンデンサにおいて
リード線加工などのストレスを加えても漏れ電流の極め
て安定した特性を示し、工業的ならびに実用的価値の大
なるものである。Effect of the Invention As described above, the electrolyte solution of the present invention to which tetrahydroxybenzoic acid or a salt thereof is added exhibits extremely stable characteristics of leakage current even when stress such as lead wire processing is applied to an electrolytic capacitor, And of great practical value.
Claims (1)
のモノエステル類、Ｎ、Ｎ−ジメチルホルムアミド、γ
−ブチロラクトンの有機溶媒に、無機、有機の酸または
これらの塩類の一種もしくは二種以上を溶質として溶解
した電解液に、0.05〜5.0重量％のテトラヒドロキシ安
息香酸またはその塩を添加したことを特徴とする電解コ
ンデンサの駆動用電解液。1. An ethylene glycol, a monoester of ethylene glycol, N, N-dimethylformamide, γ
-Characterized in that 0.05 to 5.0% by weight of tetrahydroxybenzoic acid or a salt thereof is added to an electrolytic solution in which one or more of inorganic or organic acids or salts thereof are dissolved as a solute in an organic solvent of butyrolactone. Electrolyte for driving an electrolytic capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9850489A JP2801925B2 (en) | 1989-04-18 | 1989-04-18 | Electrolyte for driving electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9850489A JP2801925B2 (en) | 1989-04-18 | 1989-04-18 | Electrolyte for driving electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02277210A JPH02277210A (en) | 1990-11-13 |
| JP2801925B2 true JP2801925B2 (en) | 1998-09-21 |
Family
ID=14221475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9850489A Expired - Fee Related JP2801925B2 (en) | 1989-04-18 | 1989-04-18 | Electrolyte for driving electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2801925B2 (en) |
-
1989
- 1989-04-18 JP JP9850489A patent/JP2801925B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02277210A (en) | 1990-11-13 |
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