Simple method and connection structure for preventing resistance increase due to contact of copper hard busbar and aluminum hard busbar

Abstract

The invention discloses a simple method and connection structure for preventing a resistance increase due to contact of a copper hard busbar and an aluminum hard busbar. The method comprises the following steps: putting a piece of tin coating copper foil paper between the copper hard busbar and the aluminum hard busbar, and then clamping tight the tin coating copper foil paper between the copper hard busbar and the aluminum hard busbar through a fastening member, the clamping force being 5 to 10 MPa. The structure is as follows: the piece of tin coating copper foil paper 3 is disposed between the copper hard busbar 1 and the aluminum hard busbar 2; three groups of fastening holes are arranged in the copper hard busbar, the aluminum hard busbar and the piece of tin coating copper foil paper respectively; and each bolt is disposed in each fastening hole, one end of each bolt being provided with a nut 5. According to the invention, a piece of cheap copper foil paper is adopted, and after being coated with a layer of soldering tin, replaces a conventional copper-aluminum transition plate to serve as a connecting transition body between the copper hard busbar and the aluminum hard busbar so that connection cost is greatly reduced. Besides, the weight is light, the connecting operation is quite convenient, and the conventional technical problems of increased resistance and severe heating in case of connection of the copper hard busbar and the aluminum hard busbar can be well solved.

Description

technical field [0001] The invention relates to a simple method and a connection structure for preventing the increase of the contact resistance of a copper-aluminum hard bus bar, belonging to the technical field of copper-aluminum conductive connection. Background technique [0002] Since the copper and aluminum busbars will form a layer of oxide layer on their surface at normal temperature, if the two conductors are directly connected, an electrochemical reaction will occur when the air is relatively humid, which will cause the contact resistance of the contact surface to increase, resulting in the connection point Heating, especially when the passing current is large, the heating will deteriorate for a long time and affect the normal power supply. In order to solve the above problems, a copper-aluminum transition plate is usually used for connection to prevent the connection from heating. However, the copper-aluminum transition plate has the problems of thicker, higher p...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a simple method and connection structure to prevent the increase of the copper-aluminum hard busbar contact resistance, and to solve the problem of copper, When the aluminum bus bar is connected, the resistance at the connection increases and heats up due to electrochemical corrosion

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