Chip aluminum electrolytic capacitor

Abstract

The invention discloses a chip aluminum electrolytic capacitor. The chip aluminum electrolytic capacitor comprises a shell provided with an opening; a core bag is arranged in the shell; an electrolyteis immersed in the core bag; the core bag comprises stacked cathode foil and anode foil; electrolytic paper serving as substrates is arranged on the same sides of the cathode foil and the anode foil;a flash voltage of the electrolyte is higher than 300V, and the temperature resistance of the electrolyte reaches 125 DEG C; the tightness of the electrolytic paper is not less than 0.60g/cm<3>; theanode foil and the cathode foil adopt aluminum foils with high cubic structures; and the content of the cubic structures is more than 80%. According to the chip aluminum electrolytic capacitor, the electrolyte can ensure the flash voltage and obtain relatively high electrical conductivity; the voltage resistance and the high temperature resistance of the capacitor can be improved; the volatilization speed of the electrolyte during high-temperature working can be reduced; the saturated steam pressure can be reduced; the high-voltage resistance and the high-temperature resistance of the aluminumelectrolytic capacitor are improved; the probability that the capacitor is broken down is effectively reduced; and the stability and reliability of a product are improved.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to a chip-type aluminum electrolytic capacitor. Background technique [0002] Aluminum electrolytic capacitors include leaded capacitors and chip capacitors. Leaded capacitors have two straight pins. Its advantage is that the process equipment is relatively mature, and its working voltage ranges from 4V to 450V, even to 500V, 550V and 600V. The disadvantage is that the space occupied by the capacitor is relatively small. Large, and can only be installed by manual insertion, and then the assembly of the whole machine can be completed by wave soldering or manual welding, which cannot realize automatic installation and low production efficiency. As electronic equipment becomes smaller and smaller and automation requirements are higher and higher, the application of traditional leaded capacitors will gradually be replaced by chip electrolytic capacitors, and chip electrolytic capaci...

AI Technical Summary

Problems solved by technology

Leaded capacitors have two straight pins. Its advantage is that the process equipment is relatively mature, and its working voltage ranges from 4V to 450V, even to 500V, 550V and 600V. The disadvantage is that the space occupied by the capacitor is relatively small. Large, and can only be installed by manual insertion, and then the assembly of the whole machine can be completed by wave soldering or manual welding, which cannot realize automatic installation and low production efficiency

[0003] However, the existing SMD aluminum electrolytic capacitors are still difficult to meet the demand in terms of high voltage resistance, high temperature resistance and service life