Working electrolyte of capacitor

Abstract

The invention discloses a working electrolyte of a capacitor. The working electrolyte comprises the following constituents based on weight rate: 46-47 parts of ethylene glycol, 1.2-1.5 parts of mannitol, 1.5-2 parts of organic carboxylic acid and salt thereof, 0.3-0.5 part of anti-corrosive agent, 1-1.5 parts of phosphoric acid, 0.5-0.7 part of phoaphoeous acid, 1-1.4 parts of trinitrophenol, 6-6.5 parts of polyethylene glycol, 2-2.4 parts of boric acid and 3-4 parts of glucose. In the electrolyte disclosed by the invention, the phosphoric acid and the phoaphoeous acid are waterproof agents, a layer of meshed aluminum phosphate conversion membrane is formed on the surface of an aluminum oxide to prevent water molecules from invading, the glucose is a hydrogen removal agent and is used for removing a gas in the electrolyte, the ethylene glycol, the polyethylene glycol, the mannitol, the organic carboxylic acid and the salt thereof and boric acid are useful for improving spark voltage of the electrolyte, the spark voltage is 440 to 460V, the conductivity is (2.5-2.8)x10<-3> S / cm, high temperature resistance, long service life, high voltage resistance and high ripple current resistance are achieved, the service life reaches over 2,500 hours, the capacitance change rate is less than 0.3 percent, and the leak current is 5 to 6 microamperes.

Description

technical field [0001] The invention relates to a working electrolyte of a capacitor. Background technique [0002] Capacitors are one of the electronic components widely used in electronic equipment, and are widely used in DC blocking, coupling, bypass, filtering, tuning loops, energy conversion, control circuits, etc. [0003] An aluminum electrolytic capacitor is made of an aluminum cylinder as the negative electrode, which is filled with a liquid electrolyte, and a bent aluminum strip is inserted as the positive electrode. The capacitor is called an aluminum electrolytic capacitor. [0004] At present, the global aluminum electrolytic capacitor supply market is becoming more and more mature, mainly concentrated in Japan, mainland China, Taiwan and South Korea. Judging from the overall competition pattern of the industry in recent years, the production volume of electrolytic capacitors in Japan has gradually shrunk, replaced by Korean companies, Taiwanese companies, and ...

AI Technical Summary

Problems solved by technology

[0009] The flash voltage and service life of the electrolyte in the prior art are not ideal enough and need to be further improved