700V high-voltage aluminum electrolytic capacitor electrolyte

Abstract

Disclosed is a 700V high-voltage aluminum electrolytic capacitor electrolyte. The electrolyte comprises 50-80% of main solvent, 20-50% of auxiliary solvent, 5-20% of main solute, 2-10% of auxiliary solute, 0.1-1% of auxiliary additive and 5-15% of spark additive, wherein the main solute comprises one or more of azelaic acid, ammonium hydrogen azelate, ammonium sebacate, decane dicarboxylic acid, 7, 9-dimethyl-7, 9-dimethoxy carbonyl-1, 11-dodecane dicarboxylic acid, and 7, 8-dimethyl-7, 8-dimethoxy carbonyl-1, 14 tetradecane dicarboxylic acid; and the auxiliary solvent comprises one or more of ammonium salicylate, salicylic acid, oxalic acid, malonic acid, succinic acid, ammonium benzoate, ammonium maleate, ammonium hydrogen maleate, ammonium adipate and hexanedioic acid. The spark voltage of the electrolyte is greater than 700V; and in addition, the electrolyte is simple to prepare, stable in performance and excellent in related parameters.

Description

technical field [0001] The invention relates to an electrolytic solution for an aluminum electrolytic capacitor, in particular to an electrolytic solution for a 700V high-voltage aluminum electrolytic capacitor. Background technique [0002] With the rapid development of science and technology, the electronics industry, as a pillar industry of the national economy, is facing enormous pressure to upgrade. Aluminum electrolytic capacitors are the basic "components" of the electronics industry, and their performance will be related to the core competitiveness of related electronics industry products. At this stage, aluminum electrolytic capacitors are developing in the direction of "miniaturization, light weight, medium and high voltage, and large capacity". As the core of aluminum electrolytic capacitors, the performance of electrolyte directly affects product development and application. Leading companies in the field of aluminum electrolytic capacitors have launched product...

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Problems solved by technology

[0003] At present, the domestic high-voltage products are mainly concentrated around 500-550V, and there are few reports on related products of 600V and above. Foreign countries mainly use synthetic macromolecular polymer esters as solutes. Due to the large size of molecular chains and strong intermolecular chemical bonds, relatively high voltage can be obtained. High flash voltage meets the needs of ultra-high voltage products, but the preparation process of related solutes is fine and complicated, and the production cost is high, which is not suitable for the domestic environment