A method for assembling a pouch battery module

Abstract

The invention discloses a method for assembling a soft-pack battery module, which includes a method for the soft-pack batteries to enter the casing, the casing is a cylinder, and the method for the soft-pack batteries to enter the casing includes the following steps : The first foam is provided on the upper and lower end surfaces of the soft-packed battery core, and a stretch film is provided on the upper end surface of the soft-pack battery core, and the shell is continuously pushed toward the The soft-packed battery moves until the soft-packed battery completely enters the shell. Using this assembly method can make the soft-packed battery enter the shell smoothly, and at the same time, the shell can maintain a certain degree of binding force on the soft-packed battery, which is beneficial to The performance of the electrical performance of the pouch battery module.

Description

technical field [0001] The invention belongs to the field of lithium battery production, and in particular relates to a method for assembling a soft pack battery module. Background technique [0002] With the upgrading and iteration of technology, as the smallest unit in the electric vehicle battery system—the battery module, the standardization of its specification and size is an inevitable trend that cannot be stopped. At present, there are mainly standard modules with lengths of 355, 390 and 590mm in the industry. Among them, the 590 standard module is especially a standard module form for passenger cars that is highly recommended by OEMs, especially foreign car companies. [0003] As we all know, the more batteries integrated in the module, the less the cost allocated per unit watt-hour. Compared with the 355 and 390 modules, the 590 module integrates more batteries, so it has obvious advantages in materials and manufacturing costs. [0004] The traditional assembly me...

AI Technical Summary

Problems solved by technology

This is because the thickness of the battery cells has certain fluctuations, especially the 590 module, which has a large number of cells, has a total of 24 cells, and the fluctuation range of the overall thickness is larger than that of other types. The pouch battery is larger, and in order to ensure the strength and discharge performance of the battery, the gap between the cell and the shell should not be too large, because the shell needs to be used to restrain the expanded cell, and if the gap reserved in the design is small Small, there may be a risk that the battery cells are too thick, so that the battery cells cannot be inserted into the shell

Images