Plastic lithium battery shell and closed processing technology thereof

Abstract

The invention discloses a plastic lithium battery shell and a closed processing technology thereof. The plastic lithium battery shell comprises a shell body and a sealing cover, the thickness of the shell body is smaller than 2 mm, a sealing opening is formed in one end of the shell body, the sealing opening is matched with the sealing cover, a convex ring strip is arranged at the end close to the sealing opening and surrounds the inner wall of the shell body by a circle, and a concave ring groove matched with the convex ring strip is formed around the outer wall of the sealing cover; and an arc-shaped groove is formed in the side, close to the interior of the shell body, of the sealing cover, the shell body comprises a plastic layer and a reinforcing layer, and the plastic layer wraps the periphery of the reinforcing layer. Compared with a traditional tinfoil battery, a steel shell battery and a conventional plastic battery, the shell body of the plastic lithium battery shell has the advantages that the shell body is thinner, a larger energy storage space can be provided for the interior of the battery under the condition of the same size, the shell body has higher strength even in a thinner state by utilizing the reinforcing layer, and meanwhile, the sealing treatment is carried out by virtue of a closed processing technology so that the overall sealing degree can meet a high-requirement lithium battery sealing condition.

Description

technical field [0001] The invention mainly relates to the technical field of lithium batteries, in particular to a plastic lithium battery shell and its airtight processing technology. Background technique [0002] In the production process of traditional tin foil batteries and steel shell batteries, multiple processes are required to complete the production, and sealing and shaping must be carried out many times, which makes the processing steps cumbersome and affects the yield of products. There are many internal materials in the shell battery, which makes the internal space smaller and affects the energy storage capacity of the battery; [0003] Because the traditional lithium battery casing is not made of plastic, the airtightness of the lithium battery casing is very high. For lithium batteries of the same size as the periphery, the thinner the wall, the larger the internal space and the greater the energy storage. The made lithium battery casing also requires thinnin...

AI Technical Summary

Problems solved by technology

[0002] In the production process of traditional tin foil batteries and steel shell batteries, multiple processes are required to complete the production, and sealing and shaping must be carried out many times, which makes the processing steps cumbersome and affects the yield of products. There are many internal materials in the shell battery, which makes the internal space smaller and affects the energy storage capacity of the battery;

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