Novel lightning-stroke protection aluminium electrolytic capacitor and preparation method therefor

Abstract

The invention provides a novel lightning-stroke protection aluminium electrolytic capacitor and a preparation method therefor. A core is immersed with an electrolyte with a break-down voltage of 490V or above; the core is formed by a pieces of positive electrode foil, a piece of negative electrode foil and electrolytic paper in an overlapping and winding manner, wherein the electrolytic paper used as a substrate is arranged on the same sides of the negative electrode foil and the positive electrode foil separately; a positive electrode conductive pin in nail joint with the positive electrode foil and a negative electrode conductive pin in nail joint with the negative electrode foil are arranged in a manner of running through a packaging layer; the electrolytic paper comprises inner layer electrolytic paper and outer layer electrolytic paper; the inner layer electrolytic paper is positioned on the inner side of the corresponding negative electrode foil or positive electrode foil; and the inner layer electrolytic paper and outer layer electrolytic paper are consistent in tightness. The overall voltage withstand capacity of the product is improved effectively, and the instantaneous voltage withstand of the aluminium electrolytic capacitor is improved to 2.2KV; and in addition, the aluminium electrolytic capacitor has high impact resistance, high safety and an effect of ensuring the service life.

Description

Technical field [0001] The invention relates to the technical field of electrolytic capacitors, in particular to a new type of lightning-resistant aluminum electrolytic capacitor and a preparation method thereof. Background technique [0002] The existing aluminum electrolytic capacitors are generally used in lighting or daily household appliances. When lightning strikes the transmission line due to sudden bad weather, an instant high-voltage surge will occur on the residential transmission line, which will cause lighting appliances or home appliances. Ordinary electrolytic capacitors in circuits such as breakdown, explosion, or drum bottom due to overvoltage may cause abnormal electrical performance and even damage the electrical equipment. [0003] Electrolytic capacitors are one of the most widely used components in electronic equipment. They are widely used in circuits such as isolation, coupling, bypass, filtering, tuning loops, energy conversion, control, etc. However, ordina...

AI Technical Summary

Problems solved by technology

However, the aluminum electrolytic capacitor can only withstand the instantaneous high-voltage impact above 1KV, and cannot withstand a higher instantaneous high-voltage impact

In the double-layer structure of its electrolytic paper, the inner electrolytic paper is made of low-density and good liquid-absorbing material to ensure sufficient electrolyte on the surface of the cathode foil and anode foil, but the ability to withstand high voltage impact is not strong, while the outer layer of electrolytic paper is made of high-strength The material of the tightness electrolytic paper improves the high-voltage impact resistance of the electrolytic paper layer, but the adsorption capacity of the electrolyte is insufficient, which may easily cause premature failure of the capacitor life

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