Working electrolyte of 630 V high-voltage aluminum electrolytic capacitor and manufacturing method thereof

A technology of aluminum electrolytic capacitors and electrolytes, which is applied in the direction of electrolytic capacitors, capacitors, circuits, etc., can solve problems such as immaturity, and achieve the effects of high aging yield, good corrosion resistance, and good batch stability

Active Publication Date: 2014-05-21
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, it is necessary to develop aluminum electrolytic capacitors with a working voltage of 600V and above to reduce the number of series connections. At the same time, in some fields, they can also replace more expensive film capacitors to meet market demand. Generally, capacitors with a voltage exceeding 500V are still in an immature stage, especially to develop products with a working voltage above 600V, it is necessary to develop a corresponding high-stable electrolyte first

Method used

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  • Working electrolyte of 630 V high-voltage aluminum electrolytic capacitor and manufacturing method thereof
  • Working electrolyte of 630 V high-voltage aluminum electrolytic capacitor and manufacturing method thereof
  • Working electrolyte of 630 V high-voltage aluminum electrolytic capacitor and manufacturing method thereof

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Embodiment 1

[0027] As shown in Table 1, a working electrolyte for 630V ultra-high voltage (small product) aluminum electrolytic capacitors is composed of the following mass percentages of raw materials: main solvent 62%, auxiliary solvent 16%, solute 15%, flash fire Voltage booster 6.7%, other additives 0.3%;

[0028] in:

[0029] The main solvent is ethylene glycol, polyglycerol ether, glycerol ester derivatives;

[0030] The auxiliary solvent is tributyl phosphate, polyethylene glycol, polyalkylene oxide polyol, γ-butyrolactone, methoxy polyethylene glycol, vinyl alcohol, polyether, polyethylene glycol fatty acid ester;

[0031] The solute is dodecanedioic acid, ammonium 12-vinyl-8-octadecenedioic acid, tetradecanedioic acid, lauric acid, 2,7-di-n-butyl azelaic acid, 2,7-di-n-butyl Suberic acid, 2-ethylazelaic acid, mannitol, triphenylamine, dimethylamine, triethylamine, triethanolamine, xylitol, sucrose, gluconic acid, phosphomolybdic acid;

[0032] The flash voltage booster is: amm...

Embodiment 2

[0037] As shown in Table 1, a working electrolyte for 630V ultra-high voltage (large-scale) aluminum electrolytic capacitors is composed of the following mass percentages of raw materials: main solvent 58%, auxiliary solvent 18%, solute 16%, flash fire Voltage booster 7.5%, other additives 0.5%;

[0038] in:

[0039] The main solvent is polyglycerol ether, glyceride derivatives, ethylene glycol, ethylene glycol dibutyl ether;

[0040] The auxiliary solvent is polyethylene glycol, polyalkylene oxide polyol, emulsifier, methoxy polyethylene glycol, polyvinyl alcohol, vinyl alcohol, polyether, polyethylene glycol fatty acid ester;

[0041] The solutes are tetradecanedioic acid, 2,7-di-n-butyl sebacic acid, 2,7-di-n-butyl suberic acid, 2-ethyl azelaic acid, mannitol, triethanolamine, triethylamine, Triethanolamine, phosphomolybdic acid;

[0042] The flash voltage booster is: polyethylene glycol ester, polyvinyl alcohol ester, silicic acid, polyglycerol ester;

[0043] Other ad...

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Abstract

The invention discloses working electrolyte of a 630 V high-voltage aluminum electrolytic capacitor and a manufacturing method thereof. The working electrolyte of the 630 V high-voltage aluminum electrolytic capacitor is characterized in that the working electrolyte is composed of 38-65% of main solvent, 3-23% of secondary solvent, 8-22% of solute, 5-10% of spark voltage increasing agent and 0.2-1% of other additives by weight. The manufacturing method includes the following steps: mixing the main solvent with the secondary solvent; adding the solute under the temperature of 110 to 115 degrees centigrade, stirring and heating to 135 to 138 degrees centigrade, preserving the heat under 135 to 138 degrees centigrade, stirring and reacting for 30 to 40 minutes, and adding the spark voltage increasing agent; cooling to 70 to 90 degrees centigrade, and adding the other additives. Compared with the prior art, the working electrolyte of the 630 V high-voltage aluminum electrolytic capacitor and the manufacturing method thereof can be used under 630 V extra-high voltage, and moreover, the electrolyte performance is stable, and the batch stability is good.

Description

technical field [0001] The invention relates to a working electrolyte for a 630V high-voltage aluminum electrolytic capacitor and a manufacturing method thereof, belonging to the technical field of aluminum electrolytic capacitors in the field of new energy. 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, China's capacitor electrolyte output accounts for an increas...

Claims

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Application Information

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