Special aluminum electrolytic capacitor for high-power power supply

Abstract

The invention discloses a special aluminum electrolytic capacitor for a high-power power supply. The aluminum electrolytic capacitor comprises a core cladding, a shell arranged outside the core cladding, and colloidal particles covering the core cladding and used for sealing the shell. Electrolyte is adsorbed on the core cladding. The electrolyte is composed of a solvent, a first solute, a secondsolute and an additive. The solvent of the electrolyte is ethylene glycol. The first solute of the electrolyte is a long-carbon-chain ammonium carboxylate solution. The second solute of the electrolyte is branched-chain ammonium dicarboxylate. The additive comprises a high-molecular polymer containing a plurality of polar groups. According to the aluminum electrolytic capacitor of the invention, long-carbon-chain ammonium carboxylate is added into a traditional ethylene glycol system to serve as a main solute, a novel branched-chain ammonium dicarboxylate is added into the traditional ethyleneglycol system to serve as a second solute, and a high-molecular polymer containing a plurality of polar groups is properly added into the electrolyte to serve as an additive, so that the sparking voltage of the capacitor can be improved, and the service life of the aluminum electrolytic capacitor can be prolonged.

Description

technical field [0001] The invention relates to the technical field of capacitor manufacturing, in particular to a special aluminum electrolytic capacitor for high-power power supply. Background technique [0002] With the continuous improvement of the penetration rate of various types of power supplies, high-power power supplies have begun to move from special applications to new markets such as power adapters, IPC power supplies, medical power supplies, industrial server power supplies, and power modules. The high-power power supply industry will achieve leapfrog development in the next 3 to 5 years, subverting the traditional power supply industry pattern. In the application of non-thermal effect of pulse electric field, high-precision pulse power supply can be obtained by using high-power switching capacitor device with pulse step-up transformer, especially now that China's industrial power supply is in a period of rapid growth, the application field of aluminum electrol...

AI Technical Summary

Problems solved by technology

[0004] Existing aluminum electrolytic capacitors, in the process of use, with the gradual volatilization and consumption of conductive liquid, the life of electrolytic capacitors will slowly go to failure

However, the conductive liquid will gradually dry up in a long-term high-temperature state, and it is easy to be broken down by the flash fire of the capacitor isolation paper during use, resulting in the problem of short life.

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