Insulating board and insulating glue sheet for laminated busbar, and production methods thereof

Abstract

The invention relates to the laminated busbar technical field, and especially relates to an insulating board for a laminated busbar; a production method includes the following steps: firstly, wire-drawing; followed by carrying out glue dipping and cloth knitting: dipping glass wires in a resin glue solution, gluing for the first time, carrying out drying semi-solidification treatment after gluing for the first time, and followed by knitting to form a glass fiber cloth blank; then roasting, and curing; and finally dipping with the glue, and curing, to obtain the insulating board. Molding cloth is adopted as a reinforcing material and is obtained through dipping with the glue; compared with a PET insulating thin film, the insulating board has better flame retardancy, and has good mechanical strength, good dimensional stability and excellent electrical stability performance in a condition of high temperature. The invention also relates to an insulating glue sheet for the laminated busbar and a production method thereof.

Description

technical field [0001] The invention relates to the technical field of laminated busbars, in particular to an insulating plate for laminated busbars, an insulating film for laminated busbars and a manufacturing method thereof. Background technique [0002] The laminated busbar is a connection bar with a multi-layer composite structure, which is to stack two or more layers of conductor materials together, and electrically isolate the layers of conductor materials with insulating materials. The insulation is heat pressed together. It can also be called composite busbars, laminated busbars, laminated busbars, composite copper bars, composite busbars, low-inductance busbars, etc. It is based on electromagnetic theory, which combines wide and thin copper bars with very thin insulating materials. It is formed by pressing, and the opposite current passes through the adjacent wires, and the magnetic fields cancel each other, which can reduce the parasitic inductance and improve the...

AI Technical Summary

Problems solved by technology

Since laminated busbars usually pass a large current, their working temperature usually exceeds 100°C, and PET film materials usually have poor high temperature resistance and flame retardancy. In order to make the laminated busbars prepared by coating the surface of PET film materials The flame retardant of the row insulation film reaches UL94V-0 level, and a large amount of flame retardant is usually added to the coated adhesive, which will lead to a decrease in the bonding performance and moisture resistance of the insulation film, and the surface of the PET film material Insulation films prepared by coating flame retardant adhesives but easily prepared by adding a large amount of flame retardants have poor mechanical strength and electrical properties and poor dimensional stability at high temperatures

[0004] At present, in the application field of high-power laminated busbars, in order to overcome the shortcomings of PET film materials such as poor high temperature resistance and insufficient flame retardant performance, FR-4 insulating boards are usually used to bond high temperature resistant pure rubber films as conductor surfaces or between conductors. However, ordinary FR-4 insulating boards are obtained by directly impregnating glass fiber cloth with epoxy glue and then drying and curing. It is inevitable that there will be hollow glass yarns or poor impregnation between yarn bundles, which will lead to The electrical performance of the insulating board is reduced

[0005] Therefore, how to solve the problem of hollow glass yarn or poor impregnation between yarn bundles in the process of gluing glass fiber cloth, and obtain an insulating board with excellent electrical properties, so that it can be better used in the field of high-power laminated busbars Become a common concern of engineers and technicians in the industry

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