A kind of high-capacity aluminum electrolytic capacitor and preparation method thereof

Abstract

A high-capacity aluminum electrolytic capacitor, including a core package and a casing, the core package is sealed and arranged in the casing through a rubber plug, and the core package is wound or folded by including anode foil, electrolytic paper and cathode foil; the core package is impregnated with The electrolytic solution is grafted with polyethylene glycol or polyethylene glycol derivatives on the electrolytic paper. In the present invention, since polyethylene glycol or polyethylene glycol derivatives are grafted on the electrolytic paper, because polyethylene glycol or polyethylene glycol derivatives have good compatibility with the solvent of the electrolyte, so in During impregnation, more electrolyte can be impregnated on the electrolytic paper, and the impregnation speed is fast.

Description

technical field [0001] The invention relates to an aluminum electrolytic capacitor, in particular to a high-capacity aluminum electrolytic capacitor and a preparation method thereof. Background technique [0002] Aluminum electrolytic capacitors are the most widely used and irreplaceable electronic components. Its output accounts for about 40% of the total electronic components, and aluminum electrolytic capacitors account for about 36.8% of the output of the three major types of capacitors (electrolytic capacitors, ceramic capacitors, and organic film capacitors). [0003] At present, my country has become the main producer of aluminum electrolytic capacitors in the world. According to the data of the IT Intelligence Center, in 2004, the output of China's aluminum electrolytic capacitors reached 70 billion, accounting for 40% of similar products in the world, and the sales volume exceeded 10 billion yuan. With the rapid development of PC products, TV sets, DVD and other a...

AI Technical Summary

Problems solved by technology

[0006] In the electrolyte, the amount of electrolyte impregnated in the core is a key factor restricting the capacity of the capacitor. Now in the case of higher and higher capacity requirements, increasing the amount of electrolyte impregnated is an important technical means. However, at present This convenience is still not done well by domestic capacitor factories, especially for high-voltage aluminum electrolytic capacitors. Due to the high viscosity of the electrolyte, the amount of electrolyte contained in the core is limited, and the speed of impregnation is very slow, which affects the packaging time of the capacitor.