Electrolyte for aluminum electrolytic capacitor and preparation method of electrolyte

An aluminum electrolytic capacitor and electrolyte technology, applied in the field of capacitors, can solve problems such as flammability and explosion, and achieve the effects of improving flash voltage, improving performance, and stabilizing good characteristic parameters.

Inactive Publication Date: 2018-09-14
SUZHOU SONGCON ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, high-voltage large-scale aluminum electrolytic capacitors have very high electrostatic energy accumulated during operation and a large amount of electrolyte, which brings greater safety problems such as inflammability and explosion.

Method used

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  • Electrolyte for aluminum electrolytic capacitor and preparation method of electrolyte
  • Electrolyte for aluminum electrolytic capacitor and preparation method of electrolyte

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preparation example Construction

[0032] The present invention also discloses a method for preparing an electrolytic solution for an aluminum electrolytic capacitor, comprising the following steps:

[0033] S1: Fully mix 50%-60% ethylene glycol and 20%-30% diethylene glycol by weight, and add flash voltage booster when heated to 70°C-80°C, stir while adding, wait until After complete dissolution, continue to add 15% to 20% of solute and continue to heat up to 120°C to 130°C, stirring until completely dissolved;

[0034] S2: Continue to raise the temperature of the mixture in S1 to 135°C~150°C, and add 0.1%~5% oxide film stabilizer, 0.1%~3% hydrogen absorbing agent and 0.5%~3% surface active Add the agent and keep stirring until it is completely dissolved;

[0035] S3: Cool the mixed solution in step S2 to 80° C. to 85° C., add 5% to 10% by weight of a flame retardant, and naturally cool to normal temperature.

[0036] In the technical solution of the present invention, five embodiments are obtained according...

Embodiment 1

[0037] Embodiment 1: an electrolytic solution for aluminum electrolytic capacitors, comprising 15% by weight of boric acid, 0.3% of phosphorous acid, 0.2% of nitrophenol, 2.5% of ammonium benzoate and polyethylene glycol 400 mixed solution, 5% Alkyl Phosphate, 55% Ethylene Glycol and 22% Diethylene Glycol.

Embodiment 2

[0038] Embodiment 2: An electrolytic solution for aluminum electrolytic capacitors, comprising 15% by weight of boric acid, 0.3% of phosphorous acid, 2% of modified polyvinyl alcohol, 0.2% of nitrophenol, and 2.5% of ammonium benzoate Mixture with polyethylene glycol 400, 5% alkyl phosphate, 55% ethylene glycol and 20% diethylene glycol.

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Abstract

The invention discloses an electrolyte for an aluminum electrolytic capacitor. The electrolyte comprises the following components in percentage by weight: 15% to 20% of solute; 0.1% to 5% of oxide film stabilizer; 1% to 10% of breakdown voltage boosting agent; 0.1% to 3% of hydrogen absorption agent; 0.5% to 3% of surfactant; 5% to 10% of flame retardant; and balance, namely a solvent. After the flame retardant is added into the electrolyte, the aluminum electrolytic capacitor is less likely to burn after being ignited; and an appropriate amount of the breakdown voltage boosting agent, oxide film stabilizer and hydrogen absorption agent is added into the electrolyte, so that the breakdown voltage of the electrolyte can be increased, and the aluminum electrolytic capacitor can maintain stable and good characteristic parameters for a long time.

Description

technical field [0001] The invention relates to an electrolyte solution and a preparation method thereof, in particular to an electrolyte solution for an aluminum electrolytic capacitor and a preparation method thereof, belonging to the technical field of capacitors. Background technique [0002] Aluminum electrolytic capacitors have the characteristics of excellent performance, large capacity, low price, easy processing, and convenient use, so they are widely used in electronic complete products such as information electronic equipment, instruments, electromechanical appliances, and home appliances. The aluminum electrolytic capacitor used for input filtering in this kind of complete machine is a key electronic component, which is usually used in series and parallel combinations, so it has high requirements for safety and reliability. [0003] However, organic acid-based electrolytes are currently widely used as working electrolytes for aluminum electrolytic capacitors due ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/035
CPCH01G9/035
Inventor 王永松
Owner SUZHOU SONGCON ELECTRONICS TECH
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