CN101373665A - Long life service working electrolytic solution of electrolytic capacitor - Google Patents
Long life service working electrolytic solution of electrolytic capacitor Download PDFInfo
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- CN101373665A CN101373665A CNA2007100451612A CN200710045161A CN101373665A CN 101373665 A CN101373665 A CN 101373665A CN A2007100451612 A CNA2007100451612 A CN A2007100451612A CN 200710045161 A CN200710045161 A CN 200710045161A CN 101373665 A CN101373665 A CN 101373665A
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Abstract
The invention provides a novel working electrolyte for an electrolytic capacitor and can prolong the service life of the capacitor. The invention utilizes the characteristic that 2,9-dimethyl sebacic acid and the salt thereof have high solubility in glycol, and are in liquid state in the normal temperature. Therefore, even though a glycol solvent in an electrolyte is volatile at the high temperature, the 2,9-dimethyl sebacic acid and the salt thereof can keep the electrical conductivity, thereby prolonging the service life of the capacitor. The invention adopts the glycol as a solvent, and adopts the 2,9-dimethyl sebacic acid and the salt thereof as main solutes, and various additives are added to prepare the high pressure working electrolyte used for driving the electrolytic capacitor. The invention is characterized in that the working electrolyte mainly comprises the following components (weight proportion): 1 percent to 10 percent of main electrolyte, 2 percent to 5 percent of auxiliary electrolyte, 64.5 percent to 80 percent of solvent, 10 percent to 20 percent of flash fire voltage improver, 0.1 percent to 1 percent of waterproof mixture, and 0.1 percent to 1 percent hydrogen elimination agent. The working electrolyte of the electrolytic capacitor can achieve the following indexes: 450-460 V of flash fire voltage, (2.0-2.4)*10<minus3>S/cm electrical conductivity at the temperature below 40 DEG C, high temperature resistance and long service life (more than 20000h at the temperature of 125 DEG C, through the 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 the electrolyte composition of mesohigh with the driving electrolytic solution of aluminium electrolytic capacitor.
Background technology
Former electrolytic capacitor driving electrolytic solution, particularly as making spent glycol in the mesohigh electrolyte substantially as solvent, 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 height in the assembly of electrochemical capacitor produces so-called destruction problem unavoidably thereupon.
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 the volatilization down of the ethylene glycol solvent high temperature in the use electrolyte of capacitor, the straight chain type saturated dicarboxylic acid is separated out as crystallization easily, thereby the generation super-high-current, can not avoid capacitor hot properties deterioration.
Chinese patent CN1511326A discloses a kind of 2-butyl suberic acid and salt thereof the electrolyte as 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 long life service working electrolytic solution of electrolytic capacitor, it utilizes 2, and 9-dimethyl decanedioic acid and salt thereof solubility in ethylene glycol is big, and promptly presents liquid characteristic at normal temperatures.Therefore, though the volatilization down of the ethylene glycol solvent high temperature in the electrolyte, 2,9-dimethyl decanedioic acid 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 2,9-dimethyl decanedioic acid and salt thereof are main solute, add various additives and be mixed with electrolytic capacitor and drive, it is characterized in that it is made up of following components in weight percentage: main electrolyte: 1%-10%, assisted electrolysis matter: 2%-5% with high-pressure work electrolysis liquid, solvent: 64.5%-80%, flash over voltage elevator: 10%-20%, waterproof mixture: 0.1%-1%, hydrogen agent: 0.1%-1% disappears.
Use this long life service working electrolytic solution of electrolytic capacitor can reach following index: flash over voltage 450-460V, 40 ℃ of following 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 long life service working and separate liquid, it adopts ethylene glycol is solvent, with 2,9-dimethyl decanedioic acid and salt thereof are main solute, add various additives and be mixed with electrolytic capacitor and drive, it is characterized in that it is made up of following components in weight percentage with high-pressure work electrolysis liquid:
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
Wherein main electrolyte is 2,9-dimethyl decanedioic acid 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 a phosphorus-containing compound; The described hydrogen agent that disappears is a 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.
Dispose electrolyte by following weight ratio:
| Composition | Content |
| Ethylene glycol | 85.6％ |
| Cetomacrogol 1000 | 4％ |
| 2,9-dimethyl decanedioic acid | 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 | 490V |
| Conductivity M/S 40℃ | 2.2±0.2ms/cm |
| The pH value | 6.5-6.8 |
| Arrive voltage | 520V |
| 125 ℃ of life tests | ≥2000h |
Claims (6)
1. long life service working electrolytic solution of electrolytic capacitor, it is a solvent with ethylene glycol, and with 2,9-dimethyl decanedioic acid and salt thereof are main solute, 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 2,9-dimethyl decanedioic acid and salt thereof.
2. according to claims 1 described a kind of long life service working electrolytic solution of electrolytic capacitor, it is characterized in that: assisted electrolysis matter is decanedioic acid, azelaic acid, dodecandioic acid, benzoic acid, phthalic acid and salt thereof.
3. according to claims 1 described a kind of long life service working electrolytic solution of electrolytic capacitor, it is characterized in that: solvent is one or more organic solvents in alcohols or the ethers, preferred ethylene glycol.
4. according to claims 1 described a kind of long life service working electrolytic solution of electrolytic capacitor, it is characterized in that: the flash over voltage elevator is the ethylene glycol solution that contains 12% polyvinyl alcohol.
5. according to claims 1 described a kind of long life service working electrolytic solution of electrolytic capacitor, it is characterized in that: the waterproof mixture is a phosphorus-containing compound.
6. according to claims 1 described a kind of long life service working electrolytic solution of electrolytic capacitor, it is characterized in that: the hydrogen agent that disappears is a nitro compound, comprises in p-nitrophenol, o-nitrophenol, meta-dinitro-benzent, paranitroanisole or the p-nitrophenyl methyl alcohol one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100451612A CN101373665A (en) | 2007-08-23 | 2007-08-23 | Long life service working electrolytic solution of electrolytic capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100451612A CN101373665A (en) | 2007-08-23 | 2007-08-23 | Long life service working electrolytic solution of electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
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| CN101373665A true CN101373665A (en) | 2009-02-25 |
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| CNA2007100451612A Pending CN101373665A (en) | 2007-08-23 | 2007-08-23 | Long life service working electrolytic solution of electrolytic capacitor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789900A (en) * | 2012-04-24 | 2012-11-21 | 南通一品机械电子有限公司 | Electrolytic capacitor working electrolyte capable of improving high-temperature resistance and prolonging service life of electrolytic capacitor |
| CN102834882A (en) * | 2010-03-26 | 2012-12-19 | 日本贵弥功株式会社 | Electrolyte for electrolytic capacitor |
| CN103325570A (en) * | 2013-07-03 | 2013-09-25 | 中国振华（集团）新云电子元器件有限责任公司 | Preparation method of high temperature resistant capacitor |
| 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 |
| CN106449109A (en) * | 2016-10-26 | 2017-02-22 | 安徽飞达电气科技有限公司 | Electrolytic capacitor long-service-life working electrolyte |
| CN106449108A (en) * | 2016-10-26 | 2017-02-22 | 安徽飞达电气科技有限公司 | Electrolytic capacitor high-temperature-resistance working electrolyte |
| CN109273268A (en) * | 2018-09-18 | 2019-01-25 | 益阳市锦汇电子有限公司 | A kind of aluminum electrolytic capacitor electrolyte and preparation method of boron-doping acid glycerine polyester |
-
2007
- 2007-08-23 CN CNA2007100451612A patent/CN101373665A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102834882A (en) * | 2010-03-26 | 2012-12-19 | 日本贵弥功株式会社 | Electrolyte for electrolytic capacitor |
| CN102834882B (en) * | 2010-03-26 | 2017-03-15 | 日本贵弥功株式会社 | Electrolyte for electrolytic capacitor |
| CN102789900A (en) * | 2012-04-24 | 2012-11-21 | 南通一品机械电子有限公司 | Electrolytic capacitor working electrolyte capable of improving high-temperature resistance and prolonging service life of electrolytic capacitor |
| CN103325570A (en) * | 2013-07-03 | 2013-09-25 | 中国振华（集团）新云电子元器件有限责任公司 | Preparation method of high temperature resistant capacitor |
| CN103325570B (en) * | 2013-07-03 | 2016-05-11 | 中国振华（集团）新云电子元器件有限责任公司 | The preparation method of high temperature resistant capacitor |
| 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 |
| CN106449109A (en) * | 2016-10-26 | 2017-02-22 | 安徽飞达电气科技有限公司 | Electrolytic capacitor long-service-life working electrolyte |
| CN106449108A (en) * | 2016-10-26 | 2017-02-22 | 安徽飞达电气科技有限公司 | Electrolytic capacitor high-temperature-resistance working electrolyte |
| CN109273268A (en) * | 2018-09-18 | 2019-01-25 | 益阳市锦汇电子有限公司 | A kind of aluminum electrolytic capacitor electrolyte and preparation method of boron-doping acid glycerine polyester |
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Open date: 20090225 |