JPS6356697B2 - - Google Patents
Info
- Publication number
- JPS6356697B2 JPS6356697B2 JP58240516A JP24051683A JPS6356697B2 JP S6356697 B2 JPS6356697 B2 JP S6356697B2 JP 58240516 A JP58240516 A JP 58240516A JP 24051683 A JP24051683 A JP 24051683A JP S6356697 B2 JPS6356697 B2 JP S6356697B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic solution
- voltage
- electrolytic
- pentadeca
- acid
- 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
Links
- 239000008151 electrolyte solution Substances 0.000 claims description 27
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 24
- 239000003990 capacitor Substances 0.000 claims description 13
- 239000002904 solvent Substances 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- 239000003792 electrolyte Substances 0.000 description 7
- 150000001735 carboxylic acids Chemical class 0.000 description 6
- 239000004135 Bone phosphate Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- WYXIGTJNYDDFFH-UHFFFAOYSA-Q triazanium;borate Chemical compound [NH4+].[NH4+].[NH4+].[O-]B([O-])[O-] WYXIGTJNYDDFFH-UHFFFAOYSA-Q 0.000 description 4
- QUJSFPXBUIZZAC-UHFFFAOYSA-N boric acid;ethane-1,2-diol Chemical compound OCCO.OB(O)O QUJSFPXBUIZZAC-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229940021013 electrolyte solution Drugs 0.000 description 2
- 150000007519 polyprotic acids Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
- OWCLRJQYKBAMOL-UHFFFAOYSA-N 2-butyloctanedioic acid Chemical compound CCCCC(C(O)=O)CCCCCC(O)=O OWCLRJQYKBAMOL-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000002048 anodisation reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
- Primary Cells (AREA)
- Secondary Cells (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、電解コンデンサの電解液に関する
もので、特に中高圧用電解コンデンサの特性の改
善を図ることを目的としたものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electrolytic solution for electrolytic capacitors, and is particularly aimed at improving the characteristics of electrolytic capacitors for medium and high voltages.
電解コンデンサの電解液は、陽極であるアルミ
ニウム等の弁金属からなる電極の表面に、陽極酸
化等の処理により形成された誘電体酸化被膜と、
陰極側電極との間にセパレータ紙に保持されて介
在し、真の陰極としての役目を果たす。またこの
電解液は、誘電体酸化被膜の欠損部や、劣化部分
を修復させる役目を併せて有している。
The electrolytic solution of an electrolytic capacitor consists of a dielectric oxide film formed on the surface of the anode, which is made of a valve metal such as aluminum, through a process such as anodization, and
It is held between the cathode side electrode by a separator paper and serves as a true cathode. Moreover, this electrolytic solution also has the role of repairing defective parts and deteriorated parts of the dielectric oxide film.
従つて、電解液自体の抵抗値や被膜修復能（化
成性）等の特性が電解コンデンサの電気的特性や
寿命特性を決定する大きな要因となる。 Therefore, characteristics such as the resistance value and film repair ability (chemical formation ability) of the electrolytic solution itself are major factors in determining the electrical characteristics and life characteristics of an electrolytic capacitor.
また、中高圧用（主に定格電圧が160Vを越え
るものを指す）電解コンデンサの電解液は、電解
液自体の耐電圧（火花電圧）が充分に高くないと
電圧印加時に電解液が放電をおこしてしまうの
で、電解液の火花電圧が高いことが必要である。 In addition, the electrolytic solution of medium-high voltage electrolytic capacitors (mainly those with a rated voltage exceeding 160V) may cause discharge when voltage is applied if the withstand voltage (spark voltage) of the electrolytic solution itself is not high enough. Therefore, it is necessary that the electrolyte has a high spark voltage.
従来の中高圧用の電解コンデンサの電解液に
は、エチレングリコールを主体とした溶媒に、硼
酸もしくはそのアンモニウム塩を溶解させた、い
わゆるエチレングリコール−硼酸系の電解液が主
として用いられてきた。この理由は、この系の電
解液が比較的高い火花電圧を有しているためであ
る。しかし、この電解液は低圧用の電解液に比較
して比抵抗が著しく高いので、損失、等価直列抵
抗の高い電解コンデンサしか得ることができなか
つた。 Conventional electrolytic solutions for medium and high voltage electrolytic capacitors have been mainly composed of so-called ethylene glycol-boric acid-based electrolytic solutions in which boric acid or its ammonium salt is dissolved in a solvent mainly composed of ethylene glycol. The reason for this is that the electrolyte of this system has a relatively high spark voltage. However, since this electrolytic solution has a significantly higher specific resistance than an electrolytic solution for low voltage use, only electrolytic capacitors with high loss and high equivalent series resistance could be obtained.
また、この系の電解液は、構成する薬品に含ま
れる水分の他に、エチレングリコールと硼酸との
エステル化反応で多量の水が生成され、この水分
が誘電体酸化被膜を劣化させ、電解コンデンサの
寿命を著しく縮める欠点を有していた。 In addition to the water contained in the constituent chemicals, this type of electrolyte generates a large amount of water through the esterification reaction between ethylene glycol and boric acid, and this water deteriorates the dielectric oxide film, causing electrolytic capacitors to had the disadvantage of significantly shortening its lifespan.
この欠点を改良した電解液として、最近は炭素
数の多い二塩基性のカルボン酸あるいはこの塩を
溶質に用いた電解液が提案されている（例えば特
開昭57−27013号公報）。 As an electrolytic solution that improves this drawback, an electrolytic solution using a dibasic carboxylic acid having a large number of carbon atoms or a salt thereof as a solute has recently been proposed (for example, Japanese Patent Application Laid-Open No. 57-27013).
この電解液は、従来からのエチレングリコール
−硼酸系の電解液に比べて、比抵抗が低く優れた
電気特性の電解コンデンサを得ることができる。
また、火花電圧も400Vを越える値を示しており、
定格電圧400Vまでの電解コンデンサの電解液と
して使用できる。 This electrolytic solution can provide an electrolytic capacitor with lower resistivity and superior electrical characteristics than conventional ethylene glycol-boric acid electrolytic solutions.
In addition, the spark voltage also exceeds 400V.
Can be used as an electrolyte for electrolytic capacitors with rated voltages up to 400V.
しかし、定格電圧が450Vのように、さらに電
圧の高い製品への適用は、困難であつた。 However, it has been difficult to apply it to products with higher voltages such as those with a rated voltage of 450V.
〔発明が解決しようとする課題〕
この発明は、従来から知られた二塩基性のカル
ボン酸を用いた電解液よりも、さらに高い電圧領
域で使用可能な電解液を得ることを目的としたも
ので、側鎖にアルキル基を有する炭素数の多い多
塩基性カルボン酸、特に三塩基性酸の中にこの目
的に合致することを見出したものである。[Problem to be solved by the invention] The purpose of this invention is to obtain an electrolytic solution that can be used in a higher voltage range than the conventionally known electrolytic solution using a dibasic carboxylic acid. It has been discovered that polybasic carboxylic acids having a large number of carbon atoms, particularly tribasic acids, having an alkyl group in the side chain meet this purpose.
この発明の電解液は、１，10，11−ペンタデカ
−トリカルボン酸、１，６，11−ペンタデカ−ト
リカルボン酸、５，６，11−ペンタデカ−トリカ
ルボン酸等の総炭素数が多く、側鎖にアルキル基
を持つ三塩基性カルボン酸のいずれかもしくは、
これらの塩をエチレングリコールを主体とした溶
媒に溶解したことを特徴としたもので、以下にこ
の発明を詳述する。
The electrolytic solution of this invention has a large total carbon number such as 1,10,11-pentadeca-tricarboxylic acid, 1,6,11-pentadeca-tricarboxylic acid, 5,6,11-pentadeca-tricarboxylic acid, etc., and has a large number of carbon atoms in the side chain. Any tribasic carboxylic acid having an alkyl group, or
The present invention is characterized in that these salts are dissolved in a solvent mainly composed of ethylene glycol, and the present invention will be described in detail below.
この発明で用いる三塩基性カルボン酸の構造は
次のとおりである。
The structure of the tribasic carboxylic acid used in this invention is as follows.
１，10，11−ペンタデカ−トリカルボン酸
１，６，11−ペンタデカ−トリカルボン酸
５，６，11−ペンタデカ−トリカルボン酸
この発明の電解液に用いられる溶質は、上記の
ごとき化合物もしくはこれとアンモニウムとを反
応させたアンモニウム塩である。これらの化合物
はいずれも炭素数が18と多く、カルボキシル基を
３個有する三塩基性カルボン酸であるが、いずれ
も溶媒に溶解し易く、充分な電導度が得られるの
で電解液の溶質として好適である。 1,10,11-pentadeca-tricarboxylic acid 1,6,11-pentadeca-tricarboxylic acid 5,6,11-pentadeca-tricarboxylic acid The solute used in the electrolytic solution of this invention is the above-mentioned compound or an ammonium salt obtained by reacting the compound with ammonium. All of these compounds are tribasic carboxylic acids with a large number of carbon atoms (18) and three carboxyl groups, but all of them are suitable as solutes in electrolyte solutions because they are easily soluble in solvents and have sufficient electrical conductivity. It is.
そして、この発明の分子量の大きい多塩基性酸
は、理由は明らかではないが、電解液とした場
合、従来の二塩基性酸に比べて火花電圧が高くな
り、高圧用の電解液として使用が可能である。 For reasons that are not clear, the high molecular weight polybasic acid of this invention has a higher spark voltage than conventional dibasic acids when used as an electrolyte, making it difficult to use as a high-voltage electrolyte. It is possible.
そこで、この発明の電解液と従来の二塩基性酸
を溶質に用いた電解液との具体的な組成と、特性
の対比を示す。
Therefore, a comparison of the specific composition and characteristics of the electrolytic solution of the present invention and a conventional electrolytic solution using a dibasic acid as a solute will be shown.
従来例
エチレングリコール 90ｇ
１，６−デカンジカルボン酸 9.3ｇ
アンモニア 0.7ｇ
このとき比抵抗は、500Ωcm（30℃）、火花電圧
は、420Vであつた。Conventional Example Ethylene glycol 90g 1,6-decanedicarboxylic acid 9.3g Ammonia 0.7g At this time, the specific resistance was 500Ωcm (30°C) and the spark voltage was 420V.
本発明例 １
エチレングリコール 90ｇ
１，10，11−ペンタデカ−トリカルボン酸 ９ｇ
アンモニア １ｇ
このとき比抵抗は、580Ωcm（30℃）、火花電圧
は、480Vであつた。Invention Example 1 Ethylene glycol 90g 1,10,11-pentadeca-tricarboxylic acid 9g ammonia 1g At this time, the specific resistance was 580Ωcm (30°C) and the spark voltage was 480V.
本発明例 ２
エチレングリコール 84ｇ
１，６，11−ペンタデカ−トリカルボン酸14.5ｇ
アンモニア 1.5ｇ
このとき比抵抗は、600Ωcm（30℃）、火花電圧
は、490Vであつた。Invention Example 2 Ethylene glycol 84g 1,6,11-pentadeca-tricarboxylic acid 14.5g Ammonia 1.5g At this time, the specific resistance was 600Ωcm (30°C) and the spark voltage was 490V.
本発明例 ３
エチレングリコール 65ｇ
メチルセロソルブ 14ｇ
５，６，11−ペンタデカ−トリカルボン酸 16ｇ
硼酸アンモニウム 2.7ｇ
アンモニア 2.3ｇ
このとき比抵抗は、610Ωcm（30℃）、火花電圧
は、490Vであつた。なおこの実施例では、硼酸
アンモニウムを同時に溶解しているが、硼酸アン
モニウムは製品のライフ特性の安定化のためで、
硼酸アンモニウムのみの電解液では、400V程度
の火花電圧しか得られないが、この発明の多塩基
性酸を溶解することで火花電圧が大幅に上昇して
いる。Invention Example 3 Ethylene glycol 65g Methyl cellosolve 14g 5,6,11-pentadeca-tricarboxylic acid 16g Ammonium borate 2.7g Ammonia 2.3g At this time, the specific resistance was 610Ωcm (30°C) and the spark voltage was 490V. In this example, ammonium borate was dissolved at the same time, but ammonium borate was used to stabilize the life characteristics of the product.
With an electrolyte containing only ammonium borate, a spark voltage of only about 400V can be obtained, but by dissolving the polybasic acid of this invention, the spark voltage is significantly increased.
この実施例から明らかなように、この発明の電
解液は、従来の二塩基性酸を用いた電解液に比べ
て、比抵抗値は若干上昇するものの、火花電圧に
ついては、60−70V上昇し、従来定格電圧で
400V程度の電解コンデンサまでしか使用できな
かつた電圧範囲を450Vまで拡大することができ
る。 As is clear from this example, although the electrolytic solution of the present invention has a slightly higher specific resistance value than the conventional electrolytic solution using a dibasic acid, the spark voltage has increased by 60-70V. , at conventional rated voltage
The voltage range that previously could only be used with electrolytic capacitors of about 400V can be expanded to 450V.
以上述べたように、この発明の電解液を用いた
電解コンデンサは、電解液の火花電圧が高いの
で、定格電圧で450V以上の高圧の用途に使用で
きる。しかも従来この領域用として使われていた
エチレングリコール−硼酸系の電解液に比べ、比
抵抗が低いので、損失、等価直列抵抗等の電気特
性を大幅に改善することができ、高電圧でしかも
高周波低インピーダンス特性が要求されるインバ
ータ、スイツチングレギユレータなどの回路に好
適である。
As described above, the electrolytic capacitor using the electrolytic solution of the present invention has a high spark voltage of the electrolytic solution, so it can be used for high voltage applications with a rated voltage of 450 V or more. Furthermore, compared to the ethylene glycol-boric acid electrolyte solution conventionally used in this area, it has a lower specific resistance, making it possible to significantly improve electrical properties such as loss and equivalent series resistance, allowing high voltage and high frequency It is suitable for circuits such as inverters and switching regulators that require low impedance characteristics.
Claims (1)
１，10，11−ペンタデカ−トリカルボン酸、１，
６，11−ペンタデカ−トリカルボン酸、５，６，
11−ペンタデカ−トリカルボン酸のいずれかもし
くはその塩を溶解したことを特徴とする電解コン
デンサ用電解液。1 In a solvent mainly composed of ethylene glycol,
1,10,11-pentadeca-tricarboxylic acid, 1,
6,11-pentadeca-tricarboxylic acid, 5,6,
1. An electrolytic solution for an electrolytic capacitor, characterized by dissolving any one of 11-pentadeca-tricarboxylic acids or a salt thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24051683A JPS60132313A (en) | 1983-12-20 | 1983-12-20 | Electrolyte for electrolytic condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24051683A JPS60132313A (en) | 1983-12-20 | 1983-12-20 | Electrolyte for electrolytic condenser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60132313A JPS60132313A (en) | 1985-07-15 |
| JPS6356697B2 true JPS6356697B2 (en) | 1988-11-09 |
Family
ID=17060682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24051683A Granted JPS60132313A (en) | 1983-12-20 | 1983-12-20 | Electrolyte for electrolytic condenser |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60132313A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6266615A (en) * | 1985-09-19 | 1987-03-26 | ニチコン株式会社 | Electrolyte for driving aluminum electrolytic condenser |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5727013A (en) * | 1980-07-25 | 1982-02-13 | Nippon Chemical Condenser Kk | Electrolyte for driving electrolytic condenser |
-
1983
- 1983-12-20 JP JP24051683A patent/JPS60132313A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5727013A (en) * | 1980-07-25 | 1982-02-13 | Nippon Chemical Condenser Kk | Electrolyte for driving electrolytic condenser |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60132313A (en) | 1985-07-15 |
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