A kind of working electrolyte of aluminum electrolytic capacitor and its preparation method

Abstract

The invention relates to the technical field of electrolyte, in particular to working electrolyte for an aluminium electrolytic capacitor and a preparation method. The electrolyte comprises 75 percent to 85 percent of ethylene glycol, 1 percent to 5 percent of pure water, 2 percent to 8 percent of adipic acid, 2 percent to 8 percent of ammonium adipate, 0.1 percent to 2 percent of ammonium hypophosphite, 0.1 percent to 2 percent of meta-nitro acetophenone and 5 to 10 percent of polyethylene glycol (PEG). The working electrolyte has the beneficial effects that the working electrolyte has low cost, high oxidation efficiency, high electric conductivity and high spark voltage, can stably work for a long time under the high temperature condition, has service life of 3,000h at a temperature of 105 DEG C and can be widely applied to the fields of a switching power supply, a power adapter and the like.

Description

technical field [0001] The invention relates to the technical field of electrolytic solutions, in particular to a preparation method and electrolytic solution suitable for high-temperature-resistant and long-life aluminum electrolytic capacitors. Background technique [0002] With the rapid development of electronic technology, the volume of electronic products is getting smaller and smaller, such as automotive electronics, power adapters, electronic ballasts and other products, the corresponding requirements for aluminum electrolytic capacitors are also getting higher and higher, especially for high-voltage aluminum electrolytic capacitors . Due to the large ripple current passing through the capacitor, the capacitor itself will generate heat and work continuously for a long time. Electronic products put forward higher requirements for capacitors: small size, high working environment temperature, and long life. [0003] The working electrolyte of the aluminum electrolytic ...

AI Technical Summary

Problems solved by technology

As the real cathode of the capacitor - the working electrolyte, the electrolyte contains moisture, and the moisture in it is easy to hydrate with the oxide film Al2O3, and the hydrated oxide film will cause the performance of the aluminum electrolytic capacitor to deteriorate until the product fails prematurely

Therefore, it is particularly important to add an appropriate waterproof mixture to the working electrolyte to prevent the oxide film from hydrating and deteriorating the performance of the capacitor.

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