Novel lightning-stroke protection aluminium electrolytic capacitor and preparation method therefor
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An aluminum electrolytic capacitor and anti-lightning strike technology, which is applied in the direction of capacitor manufacturing, capacitors, and wire-wound capacitor machines, can solve the problems of poor high-voltage impact resistance, capacitor life failure, and insufficient electrolyte adsorption capacity, etc. Strong impact ability and the effect of improving the withstand voltage ability
Active Publication Date: 2017-09-22
ZHAOQING BERYL ELECTRONICS TECH
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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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Embodiment 1
[0031] A new type of anti-lightning aluminum electrolytic capacitor preparation method, the steps are as follows:
[0032] 1) Cutting, cutting cathode foil, anode foil and electrolytic paper, wherein the electrolytic paper includes an inner layer of electrolytic paper and an outer layer of electrolytic paper, the inner layer of electrolytic paper is located inside the corresponding cathode foil or anode foil, and the inner layer is electrolyzed The tightness of the paper and the outer electrolytic paper are the same;
[0033] 2) Nail, through the encapsulation layer to nail the positive electrode lead pin and the negative electrode lead pin to the anode foil and the cathode foil respectively, and stack the electrolytic paper, cathode foil, and anode foil into electrolytic paper-cathode foil-electrolytic paper-anode foil The layered structure is wound into a core package, wherein the electrolytic paper includes an inner layer of electrolytic paper and an outer layer of electrolytic ...
Embodiment 2
[0046] This embodiment is basically the same as embodiment 1, except that, in this embodiment, the composition of the electrolyte includes: 30% hexanediol, 0.7% pure water, 0.7% ammonium sebacate, and 1.5 ammonium pentapentanoate. %, ammonium isosebacate 5%, p-nitrobenzoic acid 0.52%, hypophosphorous acid 0.9%, citric acid 2%, diethylene glycol 2%.
Embodiment 3
[0048] This embodiment is basically the same as Embodiment 1, except that, in this embodiment, the composition of the electrolyte includes: hexanediol 35%, pure water 1.2%, ammonium sebacate 1.5%, and ammonium pentapentanoate 2.2% , Ammonium isosebacate 8%, p-nitrobenzoic acid 0.70%, hypophosphorous acid 1.5%, citric acid 2%, diethylene glycol 2%.
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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...
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