Forming method for battery box upper cover

Abstract

The invention provides a forming method for a battery box upper cover. The forming method is characterized by comprising the following steps that (1), first-time drawing is performed on a sheet material to form a first piece, and the first piece is provided with a convex hull of a pressure release valve mounting surface; (2), second-time drawing is performed on the first piece to form a second piece, and the second piece is provided with a sealant mounting surface with a mounting hole; (3), trimming is performed on the second piece, and a pressure release valve mounting hole is roughly punched and formed in the pressure release valve mounting surface; (4), flanging is performed on the second piece, and the pressure release valve mounting hole is finely punched; and (5), other holes are punched, shaping is performed, and finally, the battery box upper cover is formed. By means of the forming method for the battery box upper cover, the problems in the prior art that in the battery box upper cover machining process, wrinkling and cracking are prone to appearing, resilience is large, and size matching is unqualified are solved.

Description

technical field [0001] The invention relates to the field of battery box manufacturing, in particular to a method for forming an upper cover of a battery box. Background technique [0002] Among the components of the aluminum battery box assembly, the upper cover of the battery box is one of the key parts. At present, the upper cover is generally made of aluminum alloy. In order to meet the airtightness of the battery pack, the sealing matching surface of the shell stamping part and The pressure relief valve has extremely high requirements on the size of the sealing surface. In view of the problems such as easy wrinkling and cracking, large springback and difficult control during the forming process of aluminum sheet materials, how to obtain high-quality products through good technological means is a challenge and difficult problem currently facing. Contents of the invention [0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present ...

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a method for forming the upper cover of the battery box, which is used to solve the problem of wrinkling, cracking, and large springback during the processing of the upper cover of the battery box in the prior art. and the problem of unqualified size matching

Images