Aluminum electrolytic capacitor electrolyte and preparation method thereof

Abstract

The invention relates to an aluminum electrolytic capacitor electrolyte and a preparation method thereof, wherein the electrolyte is prepared from the following raw materials in percentage by weight: 70% of glycol, 1.5% of ammonium dihydrogen phosphate, 8% of ammonium pentaborate, 14% of ammonium adipate, 4.5% of breakdown voltage enhancing agent, 1% of phosphorous acid and 1% of deionized water. The preparation method comprises the following steps: taking and adding 70kg of glycol and 1kg of deionized water into a container, uniformly stirring, and heating to 110 DEG C; weighing 4.5kg of breakdown voltage increasing agent, 1.5kg of ammonium dihydrogen phosphate, 1kg of phosphorous acid, 8kg of ammonium pentaborate and 14kg of ammonium adipate by using a scale, and then, sequentially adding the materials into the container and stirring; and keeping the mixture at the constant temperature of 110 DEG C for 30 minutes, naturally cooling the mixture to the room temperature, and then discharging. The invention has the advantages of enhancing the breakdown voltage of the electrolyte, improving the capacity of repairing aluminum foil oxidation films by oxygen ions of the electrolyte, reducing generation of water and precipitation of hydrogen gas in the working process, and obviously improving the service performance of the aluminum electrolytic capacitor.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to an electrolytic solution for an aluminum electrolytic capacitor and a preparation method thereof. Background technique [0002] The CD60 type aluminum electrolytic capacitor for refrigerator compressor is used in the AC working environment. Through the phase shifting effect of this capacitor on one winding of the compressor, a phase difference voltage is provided between the two windings of the compressor, and a rotating magnetic field is generated to start the compressor. . The working electrolyte of electrolytic capacitors occupies an extremely important position in capacitor products. It is responsible for whether the product can work normally for a long time and has the function of optimizing the electrical performance of the capacitor. The traditional working electrolyte boric acid + ethylene glycol system often produces water during work due to the esterification of boric ...

AI Technical Summary

Problems solved by technology

Hydrogen accumulates continuously in the inner cavity of the capacitor. When the internal temperature of the starting capacitor rises due to work, the air pressure in the inner cavity of the capacitor also increases, causing the capacitor to burst and affecting the safety and stability of the product.

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