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Improvement of longitudinal isolation strip of metalized safety membrane electrode

A technology of metallization and safety film, applied in the direction of fixed capacitor electrodes, parts of fixed capacitors, capacitors, etc., can solve problems such as continuous fusing, spreading, and breakdown points that cannot be safely self-healed

Active Publication Date: 2016-08-24
吴海兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the actual safety film often has a very thin metal pollution layer due to the unclear gap in the longitudinal isolation zone, so that after the small electrode unit of the safety film is punctured and blown by an electric weak point, there is still resistance between the external electrode and the external electrode. If the metal pollution is serious, even when the electric weak point on the small electrode unit of the safety film is directly pierced, the narrow strip of its coating will continue to melt, so that the breakdown point cannot be safely self-healed and spreads. ting, causing capacitor damage

Method used

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  • Improvement of longitudinal isolation strip of metalized safety membrane electrode
  • Improvement of longitudinal isolation strip of metalized safety membrane electrode
  • Improvement of longitudinal isolation strip of metalized safety membrane electrode

Examples

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Embodiment 1

[0022] Example 1 is an improvement of a metalized safety composite film with a T-shaped electrode structure vapor deposited on a polypropylene dielectric material. One side of the composite film is a margin 2.1 and a width of 2.5mm; the other side is a thickened coating Side 1.1, width 2.2mm; the horizontal gap strips 2.11 and the longitudinal gap strips 2.12 and the margins together separate the electrode coating on the membrane surface into a row of longitudinally arranged small electrode units 1.12, forming a metalized safety composite film with a T-shaped electrode structure ( Such as figure 1 with figure 2 (Shown); In this embodiment: the width of the gap strips 2.11 and 2.12 are both 0.5 mm, the longitudinal length of the small electrode unit 1.12 is 25 mm, and the width of the plating narrow strip 1.11 of the fuse is 0.5 mm. in figure 1 All the longitudinal gap strips 2.12 are arranged in a straight line, and the oil recovery width of the printed graphics is equal to the...

Embodiment 2

[0024] Example 2 Improvement of the metalized safety composite film with a grid electrode structure vapor-deposited on a polypropylene dielectric material. One side of the composite film is a margin 2.1 and a width of 2.0mm; the other side is a thickened coating Side 1.1, width 2.2mm; The oblique gap strip 2.13, the longitudinal gap strip 2.12 and the margin together separate the electrode coating on the membrane surface into many small electrode units 1.12, forming a metalized safety composite membrane with a grid electrode structure (such as image 3 , 4 Show). In this embodiment: the width of the coating strip 1.11 of the fuse is 0.3mm, the diagonal gap strip 2.13 has a width of 0.3mm, and the longitudinal gap strip 2.12 has a width of 0.6mm and a length of 10mm; image 3 All the longitudinal gap strips 2.12 are arranged in a straight line. The longitudinal gap strip 2.12 separates a row of longitudinally arranged triangular small electrode units from the coating thickened sid...

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Abstract

The invention relates to a metalized safety membrane electrode structure for a capacitor. A zinc / aluminum metal electrode coating coats a polypropylene dielectric base membrane to form a composite membrane, wherein the electrode coating on the surface of the base membrane is partitioned into a plurality of small electrode units by a plurality of longitudinal gap strips, transverse gap strips or diagonal gap strips between a blank margin of the composite membrane and a thickened side of the coating; and each small electrode unit is provided with coating narrow strips for playing a fuse role to be connected with the outside. The orientation of a column of longitudinal gap strips adjacent to the thickened side is not completely consistent with the longitudinal direction of the composite membrane, and deflects towards the left or the right for 3-5 degrees on the basis of the center points of the gap strips; and the deflection directions of adjacent small gap segments are opposite, so that the definition of the longitudinal gap strips is improved; and the partition effect reaches the ideal state.

Description

Technical field [0001] The invention relates to a metallized film for capacitors, in particular to an improvement of the electrode structure of a metallized safety film for capacitors. Background technique [0002] The use of metallized safety film technology to improve the effectiveness of self-healing of electrical weaknesses in capacitors is well known. The metallized safety film electrode structure for capacitors is to divide the metallized plating electrode vapor-deposited on the dielectric into many small electrode units with very narrow gaps, and each small electrode unit has the function of a fuse The tiny coating strips are connected to the overall electrode of the capacitor. If there is an electroweak click on the film of this structure, the breakdown discharge current will burn the strips of the coating outside the small electrode unit block where the point is located, and break down. The current is extinguished, and the small electrode unit with the breakdown point i...

Claims

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Application Information

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IPC IPC(8): H01G2/16H01G4/005
CPCH01G2/16H01G4/005
Inventor 吴海兵
Owner 吴海兵
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