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High temperature and high humidity resistant film capacitor and processing method thereof

A technology of film capacitors and processing methods, applied in the direction of film/thick film capacitors, wire wound capacitors, laminated capacitors, etc., can solve the problems of capacitance capacity and loss changes, life and reliability cannot be guaranteed, and achieve safety Stability improvement, satisfying long life and reliability, and effect of preventing moisture residue

Active Publication Date: 2019-03-01
WUXI CHENRUI NEW ENERGY TECH
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  • Claims
  • Application Information

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

Method used

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  • High temperature and high humidity resistant film capacitor and processing method thereof
  • High temperature and high humidity resistant film capacitor and processing method thereof
  • High temperature and high humidity resistant film capacitor and processing method thereof

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Embodiment Construction

[0021] A processing method for high-temperature and high-humidity film capacitor applications, which includes the following steps: evaporation process, heat setting process and potting process. After the core is shaped, the film layer is more closely bonded to prevent the residual water vapor from causing the film to oxidize, and its oxidation resistance is greatly improved; in the heat setting process, vacuum is drawn during the setting process, and the setting temperature is 100 ° C ~ 120 ° C The time is 4~8 hours, so that the film is fully shrunk, and when the temperature is raised and the vacuum is released, it is filled with an inert gas (such as nitrogen) to isolate the air; The potting is carried out in a vacuum environment, so that the core can effectively isolate the influence of water vapor in the air and improve its oxidation resistance under high temperature and high humidity conditions. In the sealing process, an acid anhydride epoxy high-temperature curing materi...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G4/33H01G4/32H01G4/224
CPCH01G4/224H01G4/32H01G4/33
Inventor 陈栋俞广铨
Owner WUXI CHENRUI NEW ENERGY TECH
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