Fabrication of aluminium casing for square lithium iron accumulator

Abstract

The invention discloses the method for manufacturing the aluminum shell of the lithium ion accumulator in square type in order to provide a method with easy operation, low cost and reliable quality to produce the shell of the accumulator. With the prefabricated cuboid of aluminum block being put to the extrusion die, the pressing machine extrudes the aluminum block to form the blank of the shell.With the blank being put to the stretch drawing die, the pressing machine stretches the blank to form the shell with four side walls, one foot wall and one opening at one side. Finally, removing the raw edge at the opening produces the aluminum shell of the lithium ion accumulator. The invention is applicable to manufacturing different type of the aluminum shell of the lithium ion accumulator.

Description

technical field [0001] The present invention relates to a method for manufacturing a battery case, and more particularly, the present invention relates to a method for manufacturing an aluminum case for a square-type lithium ion battery. Background technique [0002] At present, the commonly used manufacturing method of the lithium-ion battery case in China is: punching the metal plate into a wafer, and finally forming the battery case after 6-11 times of stretching. A set of molds, a press and an operator are required for each stretching. The smaller the shell size, the more stretching times. If the cost is reduced and the stretching times are reduced, the shell material is easy to break or wrinkle. As a result, human and material resources are wasted. [0003] At present, Japan and other countries have produced a multi-station extension machine tool that can be used to manufacture battery casings. Because the equipment itself is expensive, and t...

AI Technical Summary

Problems solved by technology

Each stretch requires a set of molds, a press and an operator. The smaller the shell size, the more stretching times. If the cost is reduced and the stretching times are reduced, the shell material will easily break or wrinkle. This results in a waste of human and material resources

[0003] At present, Japan and other countries have produced a multi-station extension machine tool that can be used to manufacture battery cases. Due to the high price of the equipment itself, and the very strict requirements on the quality of the materials used to manufacture the battery case, the cost of the battery case is very high. high