CN102254690A - Medium and high voltage working electrolyte of electrolytic capacitor - Google Patents
Medium and high voltage working electrolyte of electrolytic capacitor Download PDFInfo
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- CN102254690A CN102254690A CN2011101003643A CN201110100364A CN102254690A CN 102254690 A CN102254690 A CN 102254690A CN 2011101003643 A CN2011101003643 A CN 2011101003643A CN 201110100364 A CN201110100364 A CN 201110100364A CN 102254690 A CN102254690 A CN 102254690A
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- electrolytic capacitor
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Abstract
In the invention, glycol is used as a solvent; a mixed acid containing 2, 2, 4-trimethyl adipic acid and 2, 4, 4-trimethyl adipic acid and the salt thereof are used as a main electrolyte; various kinds of additives are added to prepare a high voltage working electrolyte of driving an electrolytic capacitor. The working electrolyte comprises, by weight, 1%-10% of the main electrolyte, 2%-5% of an auxiliary electrolyte, 64.5%-80% of a solvent, 10%-20% of a spark voltage improver, 0.1%-1% of a waterproof mixture and 0.1%-1% of a dehydrogenation agent. Using the working electrolyte of the electrolytic capacitor can reach the following indexes that: the spark voltage is 380-410v; conductivity under a temperature of 40 DEG C is (2.3-2.7) X 10-3S/cm; with characteristics of high temperature resistance and long service life, a life test at a temperature of 125 DEG C can last more than 2000 hours.
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
Mesohigh master electrolyte development is roughly as follows:
(1) boric acid+glycol system: this system is the early stage electrolyte that uses of aluminium electrolytic capacitor.Such electrolyte from boric acid produce between the crystallization water and 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 thereupon, the so-called destruction problem of unavoidable generation, this system can't be applied in hot environment, now is eliminated substantially.
(2) linear carboxylate+glycol system: adopt straight chain type saturated dicarboxylic acid such as containing azelaic acid, decanedioic acid, dodecanedioic acid or its salt as electrolyte solution, this is present domestic widely used system, but the phenomenon that linear carboxylate has crystallization to separate out at low temperatures, influenced the cryogenic property of capacitor, and the oxidation efficiency of straight-chain carboxylic acid's salt system is lower, and these problems are all restricting the further raising of capacitor performance.
(3) branched carboxylic acids salt+glycol system: foreign vendor uses branched carboxylic acids salt as main electrolyte more.Compare in the straight-chain carboxylic acid, the introducing of side-chain radical in the branched carboxylic acids is strengthened its ability that suppresses esterification under hot conditions, thereby has been improved high-temperature stability; And owing to the sterically hindered effect of group on the side chain and the polarization of alkoxy grp, its solubility in ethylene glycol is increased, thereby improve its cryogenic property, the solubility of branched carboxylic acids salt and thermal stability all are better than linear carboxylate, can produce the more excellent capacitor product of performance.
Summary of the invention
The invention provides a kind of new working electrolyte of electrolytic capacitor, it utilizes 2,2,4-trimethyladipic acid and 2,4, and the mixed acid of 4-trimethyladipic acid and salt thereof solubility in ethylene glycol is big, and promptly presents liquid characteristic at normal temperatures.Therefore, even the volatilization down of the ethylene glycol solvent high temperature in the electrolyte, described electrolyte still can keep its conductivity, prolongs the useful life of capacitor.
It is solvent that the present invention adopts ethylene glycol, with 2,2,4-trimethyladipic acid and 2,4, the mixed acid of 4-trimethyladipic acid and salt thereof are main electrolyte, 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.
Use this working electrolyte of electrolytic capacitor can reach following performance index: flash over voltage 380-410V, 40 ℃ of following conductivity (2.3～2.7) * 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 alminium electrolytic condenser Working electrolyte, it adopts ethylene glycol is solvent, with 2,2,4-trimethyladipic acid and 2,4, the mixed acid of 4-trimethyladipic 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 2,2,4-trimethyladipic acid and 2,4, the mixed acid of 4-trimethyladipic 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; Described flash over voltage elevator multipolarity water-soluble polymer, as polyvinylpyrrolidone, polyvinyl alcohol 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 better explanation the present invention, and unrestricted protection scope of the present invention.
Dispose electrolyte by following weight ratio:
| Composition | Content |
| Ethylene glycol | 68％ |
| Cetomacrogol 1000 | 4％ |
| Side chain mixed acid * | 20％ |
| Ammonium sebacate | 3％ |
| Ammonium hypophosphite | 0.5％ |
| P-nitrophenyl methyl alcohol | 0.5％ |
| Polyvinyl alcohol | 4％ |
* contain 2,2,4-trimethyladipic acid and 2,4, the ethylene glycol solution of the mixed acid ammonium salt 20% of 4-trimethyladipic acid
Institute's electrolyte performance index are as follows according to the above ratio:
| Project | Technical indicator |
| Sparking voltage | 400V |
| Conductivity M/S 40℃ | 2.5±0.2ms/cm |
| The pH value | 6.5-6.8 |
| Arrive voltage | 430V |
| 125 ℃ of life tests | ≥2000h |
Claims (6)
1. electrolytic capacitor mesohigh Working electrolyte, its composition is by weight percentage: 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, it is characterized in that: be solvent with ethylene glycol, with 2,2,4-trimethyladipic acid and 2,4, the mixed acid of 4-trimethyladipic acid and salt thereof are main electrolyte.
2. a kind of electrolytic capacitor mesohigh Working electrolyte according to claim 1, it is characterized in that: described assisted electrolysis matter is decanedioic acid, azelaic acid, dodecandioic acid, benzoic acid, phthalic acid and salt thereof.
3. a kind of electrolytic capacitor mesohigh Working electrolyte according to claim 1 is characterized in that: described solvent is one or more organic solvents in alcohols or the ethers.
4. a kind of electrolytic capacitor mesohigh Working electrolyte according to claim 1 is characterized in that: described flash over voltage elevator multipolarity water-soluble polymer.
5. a kind of electrolytic capacitor mesohigh Working electrolyte according to claim 1, it is characterized in that: described waterproof mixture is a phosphorus-containing compound.
6. a kind of electrolytic capacitor mesohigh Working electrolyte according to claim 1, it is characterized in that: 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101003643A CN102254690A (en) | 2011-04-21 | 2011-04-21 | Medium and high voltage working electrolyte of electrolytic capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101003643A CN102254690A (en) | 2011-04-21 | 2011-04-21 | Medium and high voltage working electrolyte of electrolytic capacitor |
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| CN102254690A true CN102254690A (en) | 2011-11-23 |
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| CN2011101003643A Pending CN102254690A (en) | 2011-04-21 | 2011-04-21 | Medium and high voltage working electrolyte of electrolytic capacitor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842430A (en) * | 2012-08-06 | 2012-12-26 | 深圳新宙邦科技股份有限公司 | Aluminum electrolytic capacitor electrolyte and aluminum electrolytic capacitor |
| CN103779096A (en) * | 2014-01-25 | 2014-05-07 | 南通瑞达电子材料有限公司 | Working electrolyte for high voltages in electrolytic capacitor |
| CN103928235A (en) * | 2014-04-28 | 2014-07-16 | 南通瑞泰电子有限公司 | Electrolyte solution for aluminium electrolytic capacitor |
| CN103928234A (en) * | 2014-04-28 | 2014-07-16 | 南通瑞泰电子有限公司 | Electrolyte for aluminum electrolytic capacitor |
| CN105280385A (en) * | 2014-06-11 | 2016-01-27 | 东莞市东阳光电容器有限公司 | Working electrolyte for slender-type high-voltage aluminum electrolyte capacitors |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07122462A (en) * | 1993-10-21 | 1995-05-12 | Hitachi Aic Inc | Electrolyte for electrolytic capacitor |
| CN1255714A (en) * | 1998-11-26 | 2000-06-07 | 冈村制油株式会社 | Long-chain diacid compsn. and electrolyte made therefrom |
| US6307732B1 (en) * | 1998-10-13 | 2001-10-23 | Matsushita Electric Industrial Co., Ltd. | Aluminum electrolytic capacitor |
| CN1744247A (en) * | 2004-08-30 | 2006-03-08 | 广东风华高新科技股份有限公司 | Aluminium electrolytic capacitor working electrolyte and capacitor obtained thereof |
| CN101887803A (en) * | 2010-06-23 | 2010-11-17 | 东莞万利信新材料元件有限公司 | Ultrahigh pressure large-scale aluminum electrolytic capacitor and driving electrolyte thereof |
-
2011
- 2011-04-21 CN CN2011101003643A patent/CN102254690A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07122462A (en) * | 1993-10-21 | 1995-05-12 | Hitachi Aic Inc | Electrolyte for electrolytic capacitor |
| US6307732B1 (en) * | 1998-10-13 | 2001-10-23 | Matsushita Electric Industrial Co., Ltd. | Aluminum electrolytic capacitor |
| CN1255714A (en) * | 1998-11-26 | 2000-06-07 | 冈村制油株式会社 | Long-chain diacid compsn. and electrolyte made therefrom |
| CN1744247A (en) * | 2004-08-30 | 2006-03-08 | 广东风华高新科技股份有限公司 | Aluminium electrolytic capacitor working electrolyte and capacitor obtained thereof |
| CN101887803A (en) * | 2010-06-23 | 2010-11-17 | 东莞万利信新材料元件有限公司 | Ultrahigh pressure large-scale aluminum electrolytic capacitor and driving electrolyte thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842430A (en) * | 2012-08-06 | 2012-12-26 | 深圳新宙邦科技股份有限公司 | Aluminum electrolytic capacitor electrolyte and aluminum electrolytic capacitor |
| WO2014023055A1 (en) * | 2012-08-06 | 2014-02-13 | 深圳新宙邦科技股份有限公司 | Electrolyte for aluminum electrolytic capacitor and aluminum electrolytic capacitor |
| TWI575546B (en) * | 2012-08-06 | 2017-03-21 | Aluminum Electrolytic Capacitors Electrolyte and Aluminum Electrolytic Capacitors | |
| CN103779096A (en) * | 2014-01-25 | 2014-05-07 | 南通瑞达电子材料有限公司 | Working electrolyte for high voltages in electrolytic capacitor |
| CN103928235A (en) * | 2014-04-28 | 2014-07-16 | 南通瑞泰电子有限公司 | Electrolyte solution for aluminium electrolytic capacitor |
| CN103928234A (en) * | 2014-04-28 | 2014-07-16 | 南通瑞泰电子有限公司 | Electrolyte for aluminum electrolytic capacitor |
| CN105280385A (en) * | 2014-06-11 | 2016-01-27 | 东莞市东阳光电容器有限公司 | Working electrolyte for slender-type high-voltage aluminum electrolyte capacitors |
| CN105280385B (en) * | 2014-06-11 | 2019-05-21 | 东莞市东阳光电容器有限公司 | A kind of slender type high-pressure aluminum electrolytic capacitor Working electrolyte |
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Application publication date: 20111123 |