Polymer lithium battery top seal head with excellent packaging effect

Abstract

The invention discloses a polymer lithium battery top seal head with an excellent packaging effect, and relates to the field of lithium ion battery processing, the polymer lithium battery top seal head comprises a lower seal head, the left and right sides of the top of the lower seal head are symmetrically and fixedly connected with limiting blocks, and the middle of the top of the lower seal head is provided with a lower metal groove; lower pp grooves are symmetrically formed in the tops of the inner walls of the left side and the right side of the lower metal groove, lower glue overflowing grooves are symmetrically formed in the wall bodies of the lower sealing head on the left side and the right side of the lower metal groove, an upper sealing head is arranged on the top of the lower sealing head, limiting grooves are symmetrically formed in the left side and the right side of the bottom of the upper sealing head, and an upper metal groove is formed in the middle of the bottom of the upper sealing head. According to the polymer lithium battery top seal head with the excellent packaging effect, by changing the structure of the top seal head, right-angle transition of the tab metal groove position and the tab glue groove position is changed into 45-degree oblique angle transition, so that the degree of overlarge pressure and overlow thickness of a local PP layer due to the fact that the tab metal belt is taken out of the groove is reduced, and the packaging effect is improved.

Description

technical field [0001] The invention relates to the field of lithium ion battery processing, in particular to a polymer lithium battery top sealing head with excellent packaging effect. Background technique [0002] The research and production of lithium-ion batteries have made significant progress, and their applications in various fields are becoming more and more extensive. Polymer lithium-ion batteries are favored by more and more fields due to their high safety and customizable shape. , with the explosive growth of automotive power batteries, the supply of polymer batteries is in short supply. At the same time, higher requirements are put forward for the safety and reliability of battery products. [0003] The top seal of the polymer cell package is made of aluminum plastic film and tabs by heating and pressurizing, and the PP layer of the two is fused together to seal and isolate the inside and outside of the cell. The seal usually adopts the hard seal method: the har...

AI Technical Summary

Problems solved by technology

[0003] The top seal of the polymer cell package is made of aluminum plastic film and tabs by heating and pressurizing, and the PP layer of the two is fused together to seal and isolate the inside and outside of the cell. The seal usually adopts the hard seal method: the hard seal adopts the copper head of the upper and lower molds, and slots are made at the tab position, so that the tab position and the non-tab position are subjected to the same packaging pressure to ensure the packaging effect. The party requires the tab metal strip to be consistent with the head slot during packaging. In the actual production process, the position of the tab metal strip is affected by multiple processes in the previous process, and there is a certain deviation, which causes the tab metal strip to deviate from the slot. , resulting in poor resistance of the cell side or even leakage of the cell

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