Moisture-proof thin film capacitor and preparation method thereof

A technology for film capacitors and film rolls, which is applied in film/thick film capacitors, capacitor manufacturing, capacitors, etc., and can solve problems such as affecting service life and capacitor capacity decay.

Pending Publication Date: 2018-09-28
SICHUAN ZHONGXING ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing capacitors work under high temperature and high humidity conditions, and moisture will enter the casing, thereby infiltrating into the capacitor core and causing corona effect. As the capacitor works, the corona effect will continue to occur, which will eventually lead to capacitor capacity attenuation, which is serious Affect the service life

Method used

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  • Moisture-proof thin film capacitor and preparation method thereof
  • Moisture-proof thin film capacitor and preparation method thereof
  • Moisture-proof thin film capacitor and preparation method thereof

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0022] Such as Figure 1-Figure 3 As shown, the present invention provides a moisture-proof film capacitor, including a film roll 14, a lead wire 11 and a shell 10 for protecting the film roll 14; the shell 10 is an epoxy resin shell, and its shape is a cuboid ring; the The film roll 14 has a first end face and a second end face opposite to the first end face along its axial direction; The second disc metal layer 141 on the second end face; the lead wires 11 are two, one end of one of the lead wires 11 is placed on the housing 10 and electrically connected to the first disc metal layer 140 , wherein one end of the other lead 11 is placed on the housing 10 and electrically connected to the second disk metal layer 141; the film roll 14 includes a first metallized film 12 and a...

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Abstract

The invention belongs to the technical field of metallized thin film capacitors, and particularly relates to a moisture-proof thin film capacitor and a preparation method thereof. According to the moisture-proof thin film capacitor provided by the invention, a low square resistance metal layer is added to a metallized film, when two metallized films are wound to form a film roll, the low square resistance metal layer does not form a string structure, thereby avoiding the influence on the other characteristics of the capacitor. Moreover, the low square resistance metal layer generates the riskof generating a corona effect, thus the risk of generating the corona effect is reduced, and meanwhile the speed of corona diffusion can be effectively reduced. Therefore, the low square resistance metal layer blocks the moisture, and meanwhile reduces the transfer rate of the moisture, thus ensuring the service life of the capacitor.

Description

technical field [0001] The invention belongs to the technical field of metallized film capacitors, and in particular relates to a moisture-proof film capacitor and a preparation method thereof. Background technique [0002] After the capacitor is assembled, the film roll will be completely covered with epoxy resin, and the external flame-retardant shell can play a role in moisture resistance. However, existing capacitors work under high temperature and high humidity conditions, and moisture will enter the casing, thereby infiltrating into the capacitor core and causing corona effect. As the capacitor works, the corona effect will continue to occur, which will eventually lead to capacitor capacity attenuation, which is serious affect the service life. Contents of the invention [0003] The purpose of the present invention is to solve the above problems and provide a moisture-proof film capacitor, which can work under high temperature and high humidity conditions, and the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/224H01G4/33H01G13/00
CPCH01G4/33H01G4/224H01G13/00H01G13/003
Inventor 伍骞
Owner SICHUAN ZHONGXING ELECTRONICS
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