600V extra-high voltage aluminum electrolyte capacitor working electrolyte and preparation and application thereof

Abstract

The invention relates to a 600V extra-high voltage aluminum electrolyte capacitor working electrolyte and a preparation and an application thereof; the working electrolyte comprises the following materials: 44.5-80.3% of main solvent, 5-15% of auxiliary solvent, 8-15% of solute, 0.5-2.5% of sparking voltage enhancer, 6-10% of stabilizer and 0.2-3% of hydrogen absorbent; the preparation method comprises the following steps: mixing the main solvent and the auxiliary solvent evenly, heating the mixture to 60-90 DEG C; adding sparking voltage enhancer, heating the mixture to 135-155 DEG C; cooling the heated mixture to 65-80 DEG C by circulating water, adding the solute and the stabilizer, heating the product to 105-135 DEG C; finally, adding the hydrogen absorbent and natural cooling to obtain the working electrolyte. Proper sparking voltage enhancer and stabilizer are added in the electrolyte to improve the high voltage resistant and high temperature resistant properties of electrolyte and to ensure the electrolyte to have low aerogenesis property; the aluminum electrolyte capacitor prepared by using the electrolyte has long service life and high voltage resistant property, and can not be broken down as the sparking voltage of the electrolyte is unstable.

Description

technical field [0001] The invention belongs to the field of working electrolyte for aluminum electrolytic capacitors and its preparation and application, in particular to a working electrolyte for 600V ultra-high voltage aluminum electrolytic capacitors and its preparation and application. Background technique [0002] In recent years, the development of energy electronic devices such as inverters, AC servo amplifiers, and electronic vehicles has progressed rapidly. For hybrid locomotives and fuel cell vehicles aiming at low fuel consumption and low exhaust gas, the weight reduction of the vehicle body is the development trend. For this reason, the main goal of research is to increase the voltage and lower the current of the inverter power supply for high-power drive (higher voltage of IGBT), but in many cases, capacitors are used in series in the power supply. In order to save space and reduce costs, manufacturers of electronic equipment are increasingly required to reduc...

AI Technical Summary

Problems solved by technology

Although this formula has anti-corrosion properties and reduces the amount of hydrogen produced, the effect of high-voltage resistance is not obvious, so it can only be made into 500V electrolytic capacitors

Therefore, in order to overcome the problem of unsatisfactory high-voltage resistance performance, the present invention studies aluminum electrolytic capacitors with ultra-high voltages of 600V or above

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