Thin-film capacitor for high-temperature-resistant and high-humidity-resistant application and processing method thereof

Abstract

The invention relates to the technology of the thin-film capacitor, particularly to a thin-film capacitor for high-temperature-resistant and high-humidity-resistant application and a processing method thereof. Therefore, the thin-film capacitor can still be used in a high-temperature and high-humidity environment and requirements of long service life and high reliability are met. And the prepared thin-film capacitor has high security and stability. Besides, the processing method includes an evaporation process, a heat setting process and an embedment process. The thin-film capacitor consists of a capacitor core, a potting material and a shell and is characterized in that the capacitor core is formed by winding of a metalized polypropylene film, wherein the front side and the back side of the metalized polypropylene film are processed by a plasma treatment technology.

Description

technical field [0001] The invention relates to film capacitor technology, in particular to a high-temperature and high-humidity resistant film capacitor and a processing method thereof. Background technique [0002] With the development of power electronics technology, the demand for large-capacity capacitors in various power conversions, AC drives, and energy storage power supplies continues to increase. At the same time, the requirements for high reliability in these occasions make metallized film capacitors replace aluminum electrolytic capacitors. It is becoming more and more obvious, especially in the fields of energy saving and new energy, the rapid development of applications. But at the same time, due to the expansion of application fields and constant changes in application conditions, the requirements for film capacitor products are also constantly increasing. Among them, how to improve the high-temperature and high-humidity application capabilities of products is...

AI Technical Summary

Problems solved by technology

However, for new energy applications such as photovoltaics and vehicles, film capacitors need to withstand much larger high-frequency harmonic currents than ordinary applications, and general film capacitors cannot meet the requirements of high temperature (85~105°C) and high humidity (93%RH). ) conditions for long-term use, in the case of continuous heating, the capacitance capacity and loss changes will also be affected, and the life and reliability cannot be guaranteed

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