Low leakage current working electrolyte for medium-voltage aluminum electrolytic capacitor and preparation method thereof

Abstract

The invention discloses a low leakage current working electrolyte for medium-voltage aluminum electrolytic capacitor and a preparation method thereof, wherein the working electrolyte comprises the following components in parts by weight: 40-80% of main solvent, 4-15% of auxiliary solvent, 7-20% of main solute, 5-15% of auxiliary solute, 0.05-2% of water-inhibiting agent, 0.5-5% of pressure-resistant promoting agent, 0.5-1.5% of oxidant, 0.5-1.5% of preservative and 0.5-1.5% of hydrogen-eliminating agent, wherein the main solvent is glycol. The invention has the advantages that sufficient voltage capacity is still ensured under the condition of high conductivity; the hydration of the aluminum foil during long-time work is reduced, the oxide film is more stable, the saturated vapor pressureof the oxide film is reduced, and the flash fire voltage is improved; the electrolyte oxidation efficiency is improved, and the corrosion probability of the anode lead of the capacitor is reduced; theleakage current is reduced, the hydrogen is eliminated, the capacitor bulge is prevented, and the service life of the product is prolonged.

Description

technical field [0001] The invention belongs to the field of capacitor preparation, and in particular relates to a long-life and low-leakage current working electrolyte for a 160V-250V medium-voltage aluminum electrolytic capacitor and a preparation method thereof. Background technique [0002] Aluminum electrolytic capacitors are the most widely used basic components in electronic products. With the rapid development of science and technology and the electronic industry, the requirements for various components are further improved, especially for the performance requirements of aluminum electrolytic capacitors. challenge. [0003] The electrolyte is the core component of the aluminum electrolytic capacitor and the actual cathode of the aluminum electrolytic capacitor. The service life, reliability and electrification parameters of the capacitor are closely related to it, and its performance directly affects the quality. [0004] At present, the development of miniaturizati...

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Problems solved by technology

[0008] The low-leakage current working electrolyte for medium-voltage aluminum electrolytic capacitors proposed by the present invention aims to solve the technical problems of large leakage current and low service life of existing medium-voltage aluminum electrolytic capacitors

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