Processing method of lithium ion battery pole

Abstract

The invention discloses a processing method of a lithium ion battery pole, which specifically comprises the following steps: step 1, preparing a base material, processing one end of a copper column into a step-shaped convex part, and processing an aluminum plate into a groove matched with the step-shaped convex part of the copper column; step 2, carrying out electroplating on the surface of the convex part of the copper column; step 3, coating the convex part of the copper column and the groove of the aluminum plate with metal brazing materials, and assembling the copper column and the aluminum plate; step 4, brazing the assembled copper column and the aluminum plate; step 5, removing an oxide layer and smudginess on the surface of a copper-aluminum composite pole; and step 6, carrying outoil removing and cleaning. Compared with a copper-aluminum friction welding process, the machining material utilization rate is high, the batch production efficiency is high, and the overall cost isreduced by about 30%. The copper-aluminum composite pole produced through the processing method is not prone to desoldering, the overall stability of the product is improved, and the overall weight islow. By use of the processing method, batch production can be achieved, equipment investment is low, production efficiency is high, and the production cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for processing a pole of a lithium ion battery. Background technique [0002] Copper-aluminum composite poles are one of the necessary parts for square cover plates. Because copper has a high density and is expensive, copper is much heavier per unit volume than aluminum, and the price is also much higher, so the cover plate design needs to be It is necessary to reduce the use of copper as much as possible. Except for the necessary connection of the negative electrode cell, the rest of the position is replaced by aluminum. Therefore, the existing technology uses rotary friction welding to compound aluminum on copper to make composite parts. The process has high requirements on equipment, the production efficiency of a single machine is low per unit time, the scrap rate of materials is high, and it is easy to waste materials, which leads to high overall cost of battery c...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above technical problems, the present invention provides a method for processing lithium ion battery poles, which solves the technical problems of low production efficiency, high cost, and easy desoldering of existing processing methods.

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