Battery and production method thereof

Abstract

The invention discloses a production method of a battery. The production method comprises the following steps: processing an inner connection surface on the inner side at an opening of a shell of a battery, processing an outer connection surface on the outer side of a cover plate of the battery, and enabling the sizes of the shell and the cover plate meet the size requirement of interference fit;mounting the cover plate at the opening of the shell, wherein the shell and the cover plate are in interference fit; welding the shell and the cover plate. The invention also discloses a battery produced by the production method. The battery comprises the shell and the cover plate which are welded; the inner connection surface is arranged on the inner side of the opening of the shell; the outer connection surface is arranged on the outer side of the cover plate; the cover plate is mounted at the opening of the shell, and the cover plate and the shell are in interference fit; the inner connection surface is in contact with the outer connection surface. By processing the inner connection surface and the outer connection surface and adjusting the sizes of the shell and the cover plate, interference fit is realized after the shell and the cover plate are mounted, fixation of the shell and the cover plate is ensured before welding, additional welding spots are not needed, an encapsulation process is directly performed, the production process is convenient and quick, the working efficiency is improved, the production cost is relatively low, and the production cycle is short.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a method for manufacturing batteries. In addition, the present invention also relates to a battery manufactured using the above-mentioned manufacturing method. Background technique [0002] Batteries are widely used in various fields. During the production process of the battery, it is necessary to install the cover plate at the opening of the casing, perform packaging, and then weld the cover plate and the casing. However, the lugs on the cover plate have great elasticity, which will lift up the cover plate and affect subsequent welding. Therefore, it is necessary to fix the cover plate and the shell in advance before welding. The existing fixing method is to add at least four welding points at the connection position to fix the cover plate and the shell, which requires additional welding equipment and personnel, resulting in production costs and cycles. Increase. [0003] Therefore,...

AI Technical Summary

Problems solved by technology

However, the lugs on the cover plate have great elasticity, which will lift the cover plate and affect the subsequent welding

Therefore, it is necessary to fix the cover plate and the shell in advance before welding. The existing fixing method is to add at least four welding points at the connection position to fix the cover plate and the shell, which requires additional welding equipment and personnel, resulting in production costs and cycles. Increase

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