CN101477900B - Wide temperature range high voltage aluminum electrolysis capacitor working electrolyte and preparation thereof - Google Patents
Wide temperature range high voltage aluminum electrolysis capacitor working electrolyte and preparation thereof Download PDFInfo
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- CN101477900B CN101477900B CN200810208033XA CN200810208033A CN101477900B CN 101477900 B CN101477900 B CN 101477900B CN 200810208033X A CN200810208033X A CN 200810208033XA CN 200810208033 A CN200810208033 A CN 200810208033A CN 101477900 B CN101477900 B CN 101477900B
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Abstract
The invention relates to a working electrolyte of a wide-temperature and high-pressure aluminum electrolytic capacitor, which comprises solvents glycol and r-butyrolactone, solutes 1,6-Dodecanedioic acid (1,6-DDA), dimethylamine and additive phosphoric acid, and pure water, and the weight percentages of the components are respectively 10 to 37 percent : 50 to 68 percent : 8 to 12 percent : 3 to 5percent : 0.1 to 0.6 percent : 2 to 4 percent. The preparation of the working electrolyte comprises the following steps: (1), 1,6-DDA is poured into a mixed solvent of glycol and r-butyrolactone and stirred and mixed, and then dimethylamine liquefied gas is pumped in; and the mixture is continuously stirred; (2), the electrolyte already reacted in step (1) and on the whole clarified is continuously heated to a temperature of 65 to 80 DEG C; then additive phosphoric acid is added; and finally, pure water is added, and the electrolyte is naturally cooled. Materials utilized in the working electrolyte has the advantages of low cost, good solubility and better freezing resistance performance, thereby causing the working electrolyte to be provided with good forming ability and high temperaturestability.
Description
Technical field
The invention belongs to electrolyte and preparation field thereof, particularly relate to a kind of wide temperature range high voltage aluminum electrolysis capacitor working electrolyte and preparation method thereof.
Background technology
Electrolytic capacitor is one of base components of electronic product, and is along with the development of large-screen color TV, automotive electronics, converter technique, electricity-saving lamp and communications electronics, increasing to the high-pressure aluminum electrolytic capacitor demand.
Electrolyte is the negative electrode of aluminium electrolytic capacitor, and it can repair anode oxide film fault and defective, simultaneously to serviceability temperature scope, useful life, reliability and other the decisive role such as electric property of aluminium electrolytic capacitor.The Working electrolyte that present industrial high-pressure aluminum electrolytic capacitor uses is generally ethylene glycol borate salt system and ethylene glycol. the ammonium sebacate system.The former lost efficacy owing to vapour pressure causes the capacitor bulging more easily; The latter causes condenser loss bigger because conductivity is low.The electrolyte of two kinds of systems all can not satisfy the requirement of wide temperature high voltage aluminium electrolytic capacitor to serviceability temperature scope and voltage well.
Summary of the invention
Technical problem to be solved by this invention provides a kind of wide temperature range high voltage aluminum electrolysis capacitor working electrolyte and preparation method thereof, the cost of material that the present invention uses is cheap, dissolubility is excellent, the anti-freeze performance makes Working electrolyte that good formation ability and high-temperature stability be arranged preferably.
A kind of wide temperature range high voltage aluminum electrolysis capacitor working electrolyte of the present invention, comprise: solvent is ethylene glycol and r one butyrolactone, solute is 1,6-dodecandioic acid (1,6-DDA), dimethylamine and phosphoric acid, additive is a pure water, and its percentage by weight is 10-33%: 50-68%: 8-12%: 3-5%: 0.1-0.6%: 2-4%.
The preparation method of a kind of wide temperature range high voltage aluminum electrolysis capacitor working electrolyte of the present invention comprises:
(1) be 8-12%1 with percentage by weight, it is that 10-33% ethylene glycol and percentage by weight are in the mixed solvent of 50-68%r one butyrolactone that the 6-dodecandioic acid is poured percentage by weight into, feeds the dimethylamine liquefied gas after mixing again, and process constantly stirs;
(2) step (1) has been reacted and the electrolyte of clarification substantially continues to be heated to 65-80 ℃, and to add weight of additive percentage be 0.1-0.6% phosphoric acid that adding percentage by weight at last is the 2-4% pure water, natural cooling electrolyte.
Spent glycol is a main solvent, 1,6-dodecandioic acid (1,6-DDA) wait and to be solute, and some other additive, because the interaction between them, reduced the electrolyte liquidus temperature, thereby make capacitor can be under 125 ℃ of high temperature, 500V condition of high voltage steady operation, Working electrolyte has obtained anti-freeze performance preferably, makes Working electrolyte that good formation ability and high-temperature stability be arranged.
Through outward appearance behind 85 ℃, the aging 3h of 500V do not take place with the prepared sample of the electrolyte that is equipped with the drum end, survey sample its inside also not since the flash over voltage instability do not puncture.
Beneficial effect
The cost of material that the present invention uses is cheap, dissolubility is excellent, has reduced the electrolyte liquidus temperature, thereby makes Working electrolyte obtain anti-freeze performance preferably, makes Working electrolyte that good formation ability and high-temperature stability be arranged.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
The proportioning of working electrolyte for aluminium electrolytic capacitor is: ethylene glycol 15
Weight%, r one butyrolactone 65
Weight%, 1,6-dodecandioic acid (1,6-DDA) 12
Weight%, dimethylamine 4
Weight%, phosphoric acid 0.5
Weight%, pure water 3.5
Weight%.
Its preparation: (1) is with 12
Weight%1, the 6-dodecandioic acid pours 15 into
Weight% ethylene glycol and 65
WeightIn the mixed solvent of %r one butyrolactone, feed the dimethylamine liquefied gas after mixing again, process constantly stirs;
(2) step (1) has been reacted and the electrolyte of clarification substantially continues to be heated to 65 ℃, and added additive 0.5
Weight% phosphoric acid adds 3.5 at last
WeightThe % pure water, natural cooling electrolyte.
Embodiment 2
The proportioning of working electrolyte for aluminium electrolytic capacitor is: ethylene glycol 25
Weight%, r one butyrolactone 60
Weight%, 1,6-dodecandioic acid (1,6-DDA) 9
Weight%, dimethylamine 3.5
Weight%, phosphoric acid 0.5
Weight%, pure water 2
Weight%.
Embodiment 3
The proportioning of working electrolyte for aluminium electrolytic capacitor is: ethylene glycol 33
Weight%, r one butyrolactone 52
Weight%, 1,6-dodecandioic acid (1,6-DDA) 8
Weight%, dimethylamine 3
Weight%, phosphoric acid 0.2
Weight%, pure water 3.8
Weight%.
Claims (3)
1. wide temperature range high voltage aluminum electrolysis capacitor working electrolyte, comprise: solvent ethylene glycol and r one butyrolactone, solute 1,6-dodecandioic acid 1,6-DDA, dimethylamine and additive phosphoric acid, pure water, its percentage by weight is 10-33%: 50-68%: 8-12%: 3-5%: 0.1-0.6%: 2-4%.
2. a kind of wide temperature range high voltage aluminum electrolysis capacitor working electrolyte according to claim 1, it is characterized in that: through outward appearance behind 85 ℃, the aging 3h of 500V do not take place with the capacitor of described electrolyte preparation the drum end, survey sample its inside also not since the flash over voltage instability do not puncture.
3. the preparation method of a wide temperature range high voltage aluminum electrolysis capacitor working electrolyte comprises:
(1) be 8-12%1 with percentage by weight, it is that 10-33% ethylene glycol and percentage by weight are in the mixed solvent of 50-68%r one butyrolactone that the 6-dodecandioic acid is poured percentage by weight into, feeds the dimethylamine liquefied gas after mixing again, and process constantly stirs;
(2) step (1) has been reacted and the electrolyte of clarification substantially continues to be heated to 65-80 ℃, and to add weight of additive percentage be 0.1-0.6% phosphoric acid that adding percentage by weight at last is the 2-4% pure water, natural cooling electrolyte.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810208033XA CN101477900B (en) | 2008-12-29 | 2008-12-29 | Wide temperature range high voltage aluminum electrolysis capacitor working electrolyte and preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810208033XA CN101477900B (en) | 2008-12-29 | 2008-12-29 | Wide temperature range high voltage aluminum electrolysis capacitor working electrolyte and preparation thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN101477900A CN101477900A (en) | 2009-07-08 |
| CN101477900B true CN101477900B (en) | 2010-12-29 |
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| CN200810208033XA Active CN101477900B (en) | 2008-12-29 | 2008-12-29 | Wide temperature range high voltage aluminum electrolysis capacitor working electrolyte and preparation thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6589441B1 (en) * | 2001-03-19 | 2003-07-08 | Pacesetter, Inc. | High voltage, highly conductive electrolyte for electrolytic capacitors |
| CN101026038A (en) * | 2006-02-23 | 2007-08-29 | 南通江海电容器有限公司 | Working electrolyte for aluminium electrolytic capacitor |
| CN101114544A (en) * | 2006-07-29 | 2008-01-30 | 广西师范大学 | Working electrolyte for wide temperature high voltage aluminium electrolytic capacitor and method for making same thereof |
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2008
- 2008-12-29 CN CN200810208033XA patent/CN101477900B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6589441B1 (en) * | 2001-03-19 | 2003-07-08 | Pacesetter, Inc. | High voltage, highly conductive electrolyte for electrolytic capacitors |
| CN101026038A (en) * | 2006-02-23 | 2007-08-29 | 南通江海电容器有限公司 | Working electrolyte for aluminium electrolytic capacitor |
| CN101114544A (en) * | 2006-07-29 | 2008-01-30 | 广西师范大学 | Working electrolyte for wide temperature high voltage aluminium electrolytic capacitor and method for making same thereof |
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| CN101477900A (en) | 2009-07-08 |
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Effective date of registration: 20181204 Address after: 438600 Luotian County Economic Development Zone, Huanggang City, Hubei Province Patentee after: Hubei Haicheng Electronics Co., Ltd. Address before: 226361 No. 79 Tongyang South Road, Pingchao, Tongzhou City, Jiangsu Province Patentee before: Nantong Jianghai Capacitor Co., Ltd. |
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