Packaging shell and battery

Abstract

The invention provides a packaging shell, which is used for a battery and comprises a first shell body, the first shell body comprises a top part and a first side wall, the first side wall extends downwards from the top part, the first side wall is provided with a first flange which extends outwards, and an opening is defined by the first side wall. The shell also includes a second shell body which comprises a middle part and a second flange which extends outwards from the middle part; wherein the middle part is used for covering the opening, and the first shell body and the second shell bodyare made of alloy. The invention aims to provide a packaging shell so as to improve the reliability of battery cell packaging and the consistency of battery cell sizes.

Description

technical field [0001] The invention relates to a packaging case and a battery. Background technique [0002] Most of the cells used in existing batteries are packaged in aluminum-plastic film flexible packaging. The size consistency of the aluminum-plastic film flexible packaging is poor, and the tolerance is ±0.5-1.5mm. For the soft packaging process, it can only be controlled from the control process Consistency to solve the problem of large dimensional tolerances of the cells, but this is difficult to achieve. Secondly, the sealing area of ​​the head of the flexible packaging cell and the side hemming area occupy too much volume, and the energy density of the battery cell is low, but the increase in the size of the battery cell caused by the soft packaging head and side hemming cannot be reduced. Finally, the soft package is sealed with PP hot melt, and water vapor is easy to penetrate, which leads to the failure of the battery cell. The soft package can only increase t...

AI Technical Summary

Problems solved by technology

[0002] Most of the cells used in existing batteries are packaged in aluminum-plastic film flexible packaging. The size consistency of the aluminum-plastic film flexible packaging is poor, and the tolerance is ±0.5-1.5mm. For the soft packaging process, it can only be controlled from the control process Consistency to solve the problem of large cell size tolerances, but this is difficult to achieve

Secondly, the sealing area of ​​the head of the soft-packed cell and the side hemming area occupy too much volume, and the energy density of the battery is low, but the increase in the size of the battery cell caused by the soft-packed head and side hemming cannot be reduced

Finally, the soft package is sealed with PP hot melt, and water vapor is easy to penetrate, which leads to the failure of the battery cell. The soft package can only increase the seal width to prevent water vapor penetration, which will lead to a further increase in the volume of the battery pack, which in turn will lead to a decrease in the energy density of the battery cell.

[0003] It can be seen that the consistency of cell size and the reliability of cell packaging in the prior art need to be improved urgently

Images