Electrode structure of power capacitor with metal metallized safety film for reducing temperature rising

A power capacitor and electrode structure technology, applied in the direction of fixed capacitor electrodes, fixed capacitor parts, etc., can solve the problems of reducing the working life of capacitors, large capacitance, and reduction of film withstand voltage strength, so as to improve reliability and working life , Suppress heat deformation, reduce the effect of capacity

Active Publication Date: 2007-08-08
浙江南洋华诚科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the temperature rise of the safety film capacitor is the highest near the gold-sprayed end. This will not only accelerate the deterioration of the gold-sprayed contact of the capacitor, but also reduce the withstand voltage strength of the film at the position of these heat-generating conductive bridges. Self-healing and blown, and because it is located at the root of the grid, it will cause a large capacitance loss during self-healing, reducing the working life of the capacitor
When the di...

Method used

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  • Electrode structure of power capacitor with metal metallized safety film for reducing temperature rising
  • Electrode structure of power capacitor with metal metallized safety film for reducing temperature rising
  • Electrode structure of power capacitor with metal metallized safety film for reducing temperature rising

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Embodiment 1

[0031] Embodiment 1: With reference to Fig. 1, Fig. 2, on the polypropylene base film 2 that width is W, the zinc / aluminum composite metal coating 1 of vacuum evaporation forms composite film, and metal coating constitutes the electrode of capacitor. The composite film is divided into left and right electrode structures by the longitudinal gap separator 1.31 in the transverse direction, and half of the W 2 The width range is continuous metal electrode coating partition 1.1, and the other half is W 1 The width range is grid safety film coating partition 1.2. The coating of the narrow strip on the outer edge of the continuous metal electrode coating partition 1.1 is thickened into a thickened side 1.11, which is connected with the external gold spray, and the gold spray at both ends is respectively connected to the lead wire P of the capacitor. 1 and P 2 Connected, thickened edge width L 2 with transition zone 1.12 width L 3 The sum is 3-5mm, and the metal coating thickness ...

Embodiment 2

[0035]Embodiment 2: It involves the electrode structure of metallized internal series-connected safety film capacitors. As shown in Figures 7 and 8, the upper film layer S and the lower film layer X are closely laminated, and the upper and lower film layers of each series-connected unit The electrode structure and relative protection are basically the same as the electrode structure of the safety film capacitor in Example 1; the serial units are arranged in sequence horizontally, and the arrangement method is: if the outer side of the upper film of the first unit is a continuous coating thickening edge 1.11, it is connected with the outer spray Gold connection, the inner side of the unit is a margin, which is integrated with the margin of the second unit that is also on the upper film, and is synthesized into an inner margin 2.2, and the width of the inner margin is 1.5 to 2 times that of the outer margin 2.1; The outer side of the lower film layer of the first unit should be a...

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Abstract

The invention relates to one power element, which is to reduce temperature lift of metal safe film capacitor electrode structure and comprises upper and down compound layers, wherein, each layer has two different electrode structures with its half as metal electrode coating layer and other half coated with safe film; the compound layers are symmetric covered with tight layers; the continuous metal electrode coating layers are processed into thick one connected with outer spray metal.

Description

Technical field: [0001] The invention relates to the improvement of the electrode structure of a power electronic component, especially a metallized safety film power capacitor in reducing temperature rise. Background technique: [0002] Metallized safety film capacitors are composed of double-layer metallized films stacked and wound to form a capacitor. At present, there are four basic electrode structures: one is a composite film composed of two layers of metallized continuous coating, which has a high utilization rate of the effective working area of ​​the electrode, but poor safety performance; the other is a layer of metallized continuous coating, and the other The first layer is a safety film; the safety film is divided into many small units by the electrode coating on the surface of the base film with gap grooves, and there is a composite film composed of conductive bridges that can be blown by the self-healing current between the small units. It is extremely small a...

Claims

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Application Information

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IPC IPC(8): H01G4/005
Inventor 吴克明
Owner 浙江南洋华诚科技有限公司
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