Working electrolyte for ultrahigh-voltage aluminium electrolytic capacitor and manufacturing method thereof

An aluminum electrolytic capacitor and electrolyte technology, applied in electrolytic capacitors, capacitors, circuits, etc., can solve the problems of short life, low yield in the aging process, and poor batch stability, and achieve long life, reasonable cost, and high batch stability. Effect

Inactive Publication Date: 2014-12-24
上海洪微电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in order to meet the needs of new equipment, people's demand for capacitors with a voltage above 500V is gradually increasing, especially the demand for working electrolytes at 550V and 600V. Satisfies the 500V and above 500V electrolyte for large capacitors. The working electrolyte used for ultra-high voltage aluminum electrolytic capacitors in the prior art has shortcomings such as short life, poor batch stability, and low yield in the aging process.

Method used

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  • Working electrolyte for ultrahigh-voltage aluminium electrolytic capacitor and manufacturing method thereof
  • Working electrolyte for ultrahigh-voltage aluminium electrolytic capacitor and manufacturing method thereof

Examples

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Effect test

Embodiment 1

[0024] Example 1: As shown in Table 1, a working electrolyte for ultra-high voltage aluminum electrolytic capacitors is composed of the following raw materials in mass percentage: 68% of the main solvent, 19.9% ​​of the auxiliary solvent, 8% of the solute, modified Additive 4.1%; The weight percentage of each component constitutes No. 1 working electrolyte in Table 1. The main solvents are ethylene glycol and polyglyceryl ether, the auxiliary solvents are tributyl phosphate and polyethylene glycol, and the solutes are dodecyl diacid, azelaic acid and 12-vinyl-8-octadecene dioic acid Ammonium, additives are sorbitol, o-nitroanisole, polyphosphoric acid, liquid ammonia and triethanolamine.

[0025] The specific manufacturing method of No. 1 working electrolyte is: heat ethylene glycol and tributyl phosphate to 110°C, add the main solute, stir and heat up to 115°C, add auxiliary solute and modification additives, and heat up to 130°C. Stir the reaction under heat preservation fo...

Embodiment 2

[0027] Embodiment 2: As shown in Table 1, a kind of working electrolyte for ultra-high voltage aluminum electrolytic capacitor, it is made up of the raw material of following mass percentage: main solvent 75.6%, auxiliary solvent 8%, solute 13%, modified Additive 3.4%; The weight percentage of each component forms No. 2 working electrolyte in Table 1. The main solvent is glycerin, ethylene glycol and diethylene glycol, and the auxiliary solvent is polyalkylene oxide polyol and emulsifier. The solutes are tetradecanedioic acid, lauric acid and 1,6-dodecanedioic acid, and the additives are p-nitrobenzyl alcohol, ammonium hypophosphite, dimethylamine, triethylamine and polyvinyl alcohol.

[0028] The specific manufacturing method of No. 2 working electrolyte is: heating glycerin, ethylene glycol, and diethylene glycol together to 100-110°C, adding polyvinyl alcohol and main solute, stirring and adding auxiliary solute and when the temperature is raised to 115°C Modified additive...

Embodiment 3

[0030] Example 3: As shown in Table 1, a working electrolyte for ultra-high voltage aluminum electrolytic capacitors is composed of the following raw materials in mass percentage: 67% of the main solvent, 11% of the auxiliary solvent, 18% of the solute, modified Additive 4%; the weight percentage of each component forms No. 3 working electrolyte in Table 1. The main solvent is N,N-dimethylformamide, ethylene glycol and diethylene glycol, the auxiliary solvent is polyalkylene oxide polyol, tributyl phosphate and γ-butyrolactone, and the solute is methoxypolyethylene Diol, methyl azelaic acid, 2,7-di-n-butylsuberic acid, lauric acid, 1,6-dodecanedioic acid and mannitol, the additive is cisethylene-1,2-dicarboxylic acid di Methyl esters, maleamide, phosphotungstic acid, and polyethylene glycol phosphate.

[0031] The specific manufacturing method of No. 3 working electrolyte is: the main solvent N,N-dimethylformamide, ethylene glycol and diethylene glycol, the auxiliary solvent ...

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Abstract

Disclosed in the invention is a working electrolyte for an ultrahigh-voltage aluminium electrolytic capacitor. The working electrolyte comprises the following raw materials, by mass percent: 49 to 76% of a main solvent, 5 to 20% of a secondary solvent, 6 to 25% of a solute, and 3 to 10% of a property-modifying additive. According to the manufacturing method, the main solvent and the secondary solvent are mixed; the solute is added at the temperature of 100 to 115 DEG C, and stirring is carried out and the temperature rises 130 to 135 DEG C; heat-preservation stirring is carried out and reaction is also carried out for 10 to 40 minutes; and cooling is carried out until the temperature is reduced to 70 to 90 DEG C and then the property-modifying additive is added, thereby completing preparation. According to the invention, with application of special materials, the special preparation process is used; and on the basis of optimized formulas, the combined effect of the materials is realized. The prepared working electrolyte having advantages of reasonable cost, long service life, high high-temperature stability, and high batch stability can meet the urgent need of factories in the country, especially the need of the high-end manufacturers.

Description

technical field [0001] The invention belongs to the technical field of aluminum electrolytic capacitors in the field of new energy, and in particular relates to a high-temperature-resistant and long-life working electrolyte for ultra-high-voltage aluminum electrolytic capacitors and a manufacturing method thereof. Background technique [0002] Capacitors are widely used basic electronic components, among which large aluminum electrolytic capacitors are generally used in frequency converter air conditioners, frequency conversion elevators, aviation military industry, electric welding machines, wind power generation, UPS and other equipment and new energy fields, but capacitors have very high performance requirements. The quality of the working electrolyte determines the stability, life and leakage performance of the capacitor. These properties directly determine the quality of the capacitor. The electrolyte is the core technology of the electrolytic capacitor. At present, Ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/035
Inventor 逯德新逯浩宇
Owner 上海洪微电子科技有限公司
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