Waterproofing and low-voltage aluminum electrolytic capacitor working electrolyte

Abstract

The invention provides a waterproofing and low-voltage aluminum electrolytic capacitor working electrolyte and a preparation method and application thereof. The electrolyte includes a solute, a main solvent, an auxiliary solvent, a water repellent and other additives, and the water repellent is a mixture of ethylene glycol, lauryl phosphate and hexadecyl phosphate and is obtained by mixing the ethylene glycol, the lauryl phosphate and the hexadecyl phosphate with the ratio of 8:1:1 by the mass percent at the temperature of 100-120 DEG C. The electrolyte provided has good high-temperature stability, and the capacitor assembled by the electrolyte has a long service life at a high temperature, and can achieve a life of more than 20000h at a working voltage U<=100V under the temperature of 105DEG C.

Description

technical field

[0001] The invention relates to the technical field of working electrolyte for aluminum electrolytic capacitors, in particular to a working electrolyte for waterproof and low-voltage aluminum electrolytic capacitors, its preparation method and application. Background technique

[0002] With the rapid development of electronic technology, aluminum electrolytic capacitors, as one of the basic components of electronic products, have been more and more widely used, and the accompanying aluminum foil corrosion technology for aluminum electrolytic capacitors is also constantly developing. The specific volume of the aluminum foil of the capacitor is getting higher and higher, the volume is getting smaller and smaller, and the loss value of the capacitor is relatively large, especially in the high-frequency field, the impedance value is large, which is very obvious in the water-containing low-voltage aluminum electrolytic capacitor.

[0003] The quality and performan...

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