Manufacturing method of battery shell, battery shell and battery

Abstract

The invention aims to provide a manufacturing method of a battery shell, the battery shell and a battery. The manufacturing method of the battery shell comprises the following steps that S1, a metal blank is manufactured into a tubular prefabricated metal part through hot extrusion or cold extrusion; s2, the outer side face of the prefabricated metal part is coated with a layer of ink pattern, and a non-graphite pattern area is coated with welding flux; s3, a layer of metal plate is stacked on the side face of the prefabricated metal part, and a composite board is formed through hot rolling; s4, high-pressure fluid is injected along the non-compounded part of a graphite pattern to expand the pipeline, a heat transfer working medium is injected into the pipeline, and the pipeline is sealed; and S5, end plates are installed at the two ends of the prefabricated metal part. According to the manufacturing method of the battery shell, the soaking capacity and the heat dissipation capacity of the battery shell are greatly improved, the heat dissipation path is short, the heat dissipation efficiency is improved, the heat dissipation cost is reduced, and the requirement for efficient heat control of the electric core level is met.

Description

technical field [0001] The invention belongs to the field of lithium batteries, and in particular relates to a method for manufacturing a battery casing, a battery casing and a battery. Background technique [0002] In my country, the new energy industry has developed rapidly with the encouragement of national policies, and secondary batteries such as lithium-ion batteries have been widely used. Generally, the square battery uses a light and thin aluminum shell as the outer shell, plus the battery cell and electrolyte, and welds the upper cover plate to form a sealed shape. However, this square battery cannot effectively solve the problem of heat generation, which may lead to shortened battery life, or lead to smoke, fire or even explosion of the battery. In addition, traditional prismatic batteries need to use other auxiliary materials or devices outside the battery to help dissipate heat. The heat dissipation path is long, the heat dissipation efficiency is reduced, and t...

AI Technical Summary

Problems solved by technology

However, this square battery cannot effectively solve the problem of heat generation, which may shorten the life of the battery, or cause smoke, fire or even explosion.

In addition, traditional prismatic batteries need to use other auxiliary materials or devices outside the battery to help dissipate heat. The heat dissipation path is long, the heat dissipation efficiency is reduced, and the heat dissipation cost is high.

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