Method for Enhancing High Temperature and Low Temperature Resistance of Aluminum Electrolytic Capacitors

Abstract

The invention discloses a method for enhancing the high temperature resistance and low temperature resistance of an aluminum electrolytic capacitor, which includes the preparation of an electrolyte, and the electrolyte includes the following raw materials in parts by weight: main solvent: 48-80%; auxiliary solvent: 10-32%, solute : 15-30%, additives: 0.3-3.2%, wherein, the solvent composed of the main solvent and the auxiliary solvent is a liquid with low saturated vapor pressure; the solute is tetramethylammonium maleate, ammonium adipate, triethylamine, One or more of 1,2-dimethylimidazolium phosphoric acid and phosphorous acid. Due to the selection of solvents with low saturated vapor pressure, the ratio of solutes is increased to ensure that the electrolyte does not condense at low temperature and the solutes do not precipitate; adding hydrogen absorbing agents and water suppressing agents reduces the internal pressure of the product; adding inhibitors and low leakage agents, The occurrence of high-temperature characteristic defects such as too fast recovery of electric leakage is prevented; the invention can also effectively ensure the low-temperature stability of the electrolyte, and provide guarantee for the stable operation of the LED driving power supply.

Description

technical field [0001] The invention relates to a production process of an aluminum electrolytic capacitor, in particular to a method for enhancing the high temperature and low temperature resistance of an aluminum electrolytic capacitor. Background technique [0002] The operating temperature range of traditional aluminum electrolytic capacitors can be divided into: -55~105°C (6.3V~100); -40~105°C (160V~400V); -25~105°C (160V~400V). [0003] Traditional aluminum electrolytic capacitors are prone to high impedance, electrolyte crystallization, and rubber cover aging when used at low temperatures, while at high temperatures, hydration, excessive corrosion of aluminum foil, rapid capacity decay, and reduced pressure resistance are prone to occur. Gas drum, non-working state leakage rises quickly and rubber cover aging and other phenomena. Contents of the invention [0004] In order to overcome the above disadvantages, the purpose of the present invention is to provide a met...

AI Technical Summary

Problems solved by technology

[0003] Traditional aluminum electrolytic capacitors are prone to high impedance, electrolyte crystallization, and rubber cover aging when used at low temperatures, while at high temperatures, hydration, excessive corrosion of aluminum foil, rapid capacity decay, and reduced pressure resistance are prone to occur. Phenomena such as steam drum, non-working state leakage rises quickly, and rubber cover aging