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Low-temperature and high-voltage resistant aluminum electrolytic capacitor work electrolyte and preparation method thereof

An aluminum electrolytic capacitor, low temperature resistant technology, applied in electrolytic capacitors, capacitors, circuits, etc., to achieve the effect of improving performance parameters, good frost resistance, and promoting ionization degree

Inactive Publication Date: 2017-05-31
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrolyte needs to have wide temperature characteristics and a stable voltage range; however, there is no working electrolyte for aluminum electrolytic capacitors that can withstand -55°C and 600V high voltage on the market

Method used

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preparation example Construction

[0022] A method for preparing a working electrolyte for an aluminum electrolytic capacitor resistant to low temperature and high pressure, comprising the following steps: 1) under the condition that the humidity is less than 60%, mixing a main solvent and an auxiliary solvent by mass percentage and raising the temperature to 70-90 degrees Celsius;

[0023] 2) Add the solute to the mixed solution in step 1), and heat to 120-140 degrees Celsius and stir to dissolve;

[0024] 3) Maintain a temperature of 120-140 degrees Celsius for 40-80 minutes;

[0025] 4) Cool to 90-110 degrees Celsius, add flash fire boosting additive and gas absorbing additive, stir to dissolve and cool to room temperature.

Embodiment 1

[0027] A low-temperature and high-voltage-resistant working electrolyte for aluminum electrolytic capacitors, which consists of 50% ethylene glycol, 40% diethylene glycol monomethyl ether,

[0028] Ammonium sebacate 6%, alkyl ammonium dodecanoate 2%, citric acid 1%, p-nitrobenzyl alcohol 1%, the above ingredients are by mass percentage. When preparing the working electrolyte of the aluminum electrolytic capacitor of this embodiment, firstly, under the condition that the humidity is less than 60%, ethylene glycol and diethylene glycol monomethyl ether are mixed, and the temperature is raised to 90 degrees Celsius; then ammonium sebacate and alkane Ammonium dodecanoate was added to the mixture, heated to 125 degrees Celsius, stirred and dissolved, and maintained at 125 degrees Celsius for 70 minutes; finally cooled to 100 degrees Celsius, added citric acid and p-nitrobenzyl alcohol, stirred to dissolve and cooled to room temperature.

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Abstract

A low-temperature and high-voltage resistant aluminum electrolytic capacitor work electrolyte comprises by the mass percent: 45-75% of the main solvent, the 15-40% of the secondary solvent, 3-12% of the solute, 0.5-2% of the flash fire promotion additive, 0.2-1.5% of the gas absorption additive; the main solvent is one or more than one of the ethylene glycol, the propylene glycol, the glycerol, the polyethylene glycol 200 and the polyethylene glycol 400. The secondary solvent is one or more than one of the [Gamma]-butyrolactone, the dimethylformamide, the diglycolic simple methyl ether, the diethylene glycol monoethyl ether and the diethlyeneglycol monobutylether. The secondary solvent can be propylene carbonate and one or more than one of the [Gamma]-butyrolactone, the dimethylformamide, the diglycolic simple methyl ether, the diethylene glycol monoethyl ether and the diethlyeneglycol monobutylether. The low-temperature and high-voltage resistant aluminum electrolytic capacitor work electrolyte can resist the -55 DEG C and high voltage of 600V.

Description

technical field [0001] The invention relates to a working electrolyte of an aluminum electrolytic capacitor, in particular to a working electrolyte of an aluminum electrolytic capacitor resistant to low temperature and high pressure and a preparation method thereof. Background technique [0002] Aluminum electrolytic capacitors are the most widely used basic components in electronic products. In recent years, with the rapid development of science and technology and the electronic industry, various outdoor electrical products and equipment are constantly being introduced, requiring electrical equipment to have good temperature performance and stability to cope with complex and changeable natural environments. These demands have greatly expanded the market for low-temperature resistant, high-voltage aluminum electrolytic capacitors, and at the same time posed new challenges to the performance of aluminum electrolytic capacitors. [0003] As the core component of aluminum elec...

Claims

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Application Information

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IPC IPC(8): H01G9/035
CPCH01G9/035
Inventor 贾明曹亮李焱根胡啸宇艾亮
Owner CENT SOUTH UNIV
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