CN102930988A - Electrolytic capacitor solution - Google Patents
Electrolytic capacitor solution Download PDFInfo
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- CN102930988A CN102930988A CN 201110226427 CN201110226427A CN102930988A CN 102930988 A CN102930988 A CN 102930988A CN 201110226427 CN201110226427 CN 201110226427 CN 201110226427 A CN201110226427 A CN 201110226427A CN 102930988 A CN102930988 A CN 102930988A
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- electrolytic capacitor
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- ethylene glycol
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Abstract
The invention provides an electrolytic capacitor solution. The characteristics that 2, 7-dimethyl suberic acid and salts thereof have high solubility in ethylene glycol and are liquid in state at room temperature are utilized. Therefore, even if the ethylene glycol solvent in the electrolytic solution volatilizes at high temperature, 2, 7-dimethyl suberic acid and the salts thereof can still maintain the conductivity, and the service life of a capacitor is prolonged. In the invention, ethylene glycol is used as a solvent, 2, 7-dimethyl suberic acid and the salts thereof are used as main solutes, and various additives are added to prepare the electrolytic capacitor solution. The electrolytic capacitor solution is characterized by comprising the following components in percentage by weight: 1-10% of main electrolyte, 2-5% of auxiliary electrolyte, 64.5-80% of solvent, 10-20% of flash fire voltage improving agent, 0.1-1% of waterproof mixture and 0.1-1% of hydrogen eliminating agent. With the electrolytic capacitor working solution, the following indicators can be achieved: the flash fire voltage is 450-460 V, the conductivity is (2.0-2.4)*10<-3> S/cm below 40 DEG C, high temperature resistance is achieved, the service life is long, and the service life can be longer than 2000 h through 125 DEG C service life test.
Description
Technical field
The present invention relates to electrolyte for electrolytic capacitor, i.e. the driving electrolytic solution of electrolytic capacitor particularly relates to and can be advantageously used for mesohigh with electrolysis capacitive liquid composition.
Background technology
Former electrolytic capacitor driving electrolytic solution, particularly as substantially making spent glycol as solvent in the mesohigh electrolyte, boric acid or boric acid ammonium salt are used as electrolytical additive, such electrolyte produces the crystallization water from boric acid, and between ethylene glycol and the boric acid because esterification generates a large amount of condensation water, cause the moisture of electrolyte system inside to raise, when its result uses this electrolyte under surpassing 100 ℃ serviceability temperature condition, water in the electrolyte will become steam and evaporate, voltage rise is high in the assembly of electrochemical capacitor thereupon, produces unavoidably so-called destruction problem.
In order to improve this shortcoming, can adopt straight chain type saturated dicarboxylic acid such as containing azelaic acid, decanedioic acid, dodecanedioic acid or its salt as electrolyte solution.But, this straight chain type saturated dicarboxylic acid is lower for solvent dissolubilities such as ethylene glycol, and along with volatilizing under the ethylene glycol solvent high temperature in the use electrolyte of capacitor, the straight chain type saturated dicarboxylic acid is easily as crystallization, thereby the generation super-high-current, can not avoid the capacitor hot properties deteriorated.
Chinese patent CN1511326A discloses a kind of 2-butyl suberic acid and salt thereof as the electrolyte of solute, because 2-butyl suberic acid makes moderate progress for the solubility of the ethylene glycol solvent solubility than aforementioned linear type saturated dicarboxylic acid or its salt, thereby tells on.
Summary of the invention
The invention provides a kind of new electrochemical capacitor liquid, it utilizes 2,7-dimethyl-octa diacid and salt thereof solubility in ethylene glycol large, and namely presents at normal temperatures liquid characteristic.Therefore, even volatilize under the ethylene glycol solvent high temperature in the electrolyte, 2,7-dimethyl-octa diacid and salt thereof still can keep its conductivity, prolong the useful life of capacitor, can get around existing patent limitation.
It is solvent that the present invention adopts ethylene glycol, with 2,7-dimethyl-octa diacid and salt thereof are main solute, add various additives and be mixed with electrolytic capacitor and drive and to use high-voltage working electrolyte, it is characterized in that it is comprised of the component of following weight proportioning: main electrolyte: 1%-10%, assisted electrolysis matter: 2%-5%, solvent: 64.5%-80%, flash over voltage elevator: 10%-20%, waterproof mixture: 0.1%-1%, hydrogen agent: 0.1%-1% disappears.
Use this high pressure working electrolytic solution of electrolytic capacitor can reach following index: flash over voltage 450-460V, 40 ℃ of lower conductivity (2.0～2.4) * 10
-3S/cm, the high temperature resistance and long life-span is more than 125 ℃ of life test 2000h.
Embodiment
The invention provides a kind of electrochemical capacitor liquid, it adopts ethylene glycol is solvent, is main solute with 2,7-dimethyl-octa diacid and salt thereof, add various additives and be mixed with electrolytic capacitor and drive and to use high-voltage working electrolyte, it is characterized in that it is comprised of the component of following weight proportioning:
Main electrolyte: 1%-10%
Assisted electrolysis matter: 2%-5%
Solvent: 64.5%-80%
Flash over voltage elevator: 10%-20%
Hydrogen agent: 0.1%-1% disappears
Wherein main electrolyte is 2,7-dimethyl-octa diacid and salt thereof; Assisted electrolysis matter is decanedioic acid, azelaic acid, dodecandioic acid, benzoic acid, phthalic acid and salt thereof; Solvent is one or more organic solvents in alcohols or the ethers, preferred ethylene glycol; Described flash over voltage elevator is the multipolarity high molecular polymer, comprises polyvinyl alcohol, polyvinylpyrrolidone, polyacrylamide etc.; Described waterproof mixture is phosphorus-containing compound; The described hydrogen agent that disappears is nitro compound, comprises in p-nitrophenol, o-nitrophenol, meta-dinitro-benzent, paranitroanisole or the p-nitrophenyl methyl alcohol one or more.
Embodiment:
Following embodiment is for the present invention is described better, and unrestricted protection scope of the present invention.
Configure electrolyte by following weight ratio:
| Composition | Content |
| Ethylene glycol | 85.6％ |
| Cetomacrogol 1000 | 4％ |
| 2,7-dimethyl-octa diacid | 4％ |
| Ammonium sebacate | 3％ |
| Ammonium hypophosphite | 0.5％ |
| P-nitrophenyl methyl alcohol | 0.5％ |
| Polyvinyl alcohol | 2.4％ |
Institute's electrolyte performance index are as follows according to the above ratio:
| Project | Technical indicator |
| Sparking voltage | 470V |
| Conductivity M/S 40℃ | 2.2±0.2ms/cm |
| The pH value | 6.5-6.8 |
| Arrive voltage | 500V |
| 125 ℃ of life tests | ≥2000h |
Claims (2)
1. electrochemical capacitor liquid, it is main solute take ethylene glycol as solvent with 2,7-dimethyl-octa diacid and salt thereof, its proportioning is: main electrolyte: 1%-10%, assisted electrolysis matter: 2%-5%, solvent: 64.5%-80%, flash over voltage elevator: 10%-20%, waterproof mixture: 0.1%-1%, hydrogen agent: the 0.1%-1% that disappears, it is characterized in that: main electrolyte is 2,7-dimethyl-octa diacid and salt thereof.
2. according to claims 1 described a kind of electrochemical capacitor liquid, it is characterized in that: assisted electrolysis matter is decanedioic acid, azelaic acid, dodecandioic acid, benzoic acid, phthalic acid and salt thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110226427 CN102930988A (en) | 2011-08-09 | 2011-08-09 | Electrolytic capacitor solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110226427 CN102930988A (en) | 2011-08-09 | 2011-08-09 | Electrolytic capacitor solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102930988A true CN102930988A (en) | 2013-02-13 |
Family
ID=47645765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110226427 Pending CN102930988A (en) | 2011-08-09 | 2011-08-09 | Electrolytic capacitor solution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102930988A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105977027A (en) * | 2016-08-04 | 2016-09-28 | 湖南柯立凯科技开发有限公司 | Electrolyte for aluminum electrolytic capacitor |
-
2011
- 2011-08-09 CN CN 201110226427 patent/CN102930988A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105977027A (en) * | 2016-08-04 | 2016-09-28 | 湖南柯立凯科技开发有限公司 | Electrolyte for aluminum electrolytic capacitor |
| CN105977027B (en) * | 2016-08-04 | 2017-11-17 | 湖南柯立凯科技开发有限公司 | A kind of electrolyte for aluminum electrolytic capacitor |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130213 |