Manufacturing method of battery module

Abstract

The invention discloses a manufacturing method of a battery module. The manufacturing method comprises the following steps of putting a loosened battery module on a working table and enabling one end to prop against a stop-propping plate; driving an extrusion plate to extrude the battery module to a predetermined length L by a driving part; detecting the pressure of the extrusion plate by a pressure sensor, and judging whether the detection pressure value F is within a pressure requirement range or not, wherein the minimum value is F1 and the maximum value is F2; if F is greater than F1 and less than F2, executing a next step; and if F is less than F1, enabling the extrusion plate to continually extrude the battery module until the detection pressure value F is equal to (F1+F2) / 2, obtaining the length L1 of the battery module, calculating a difference value <delta> L which is equal to L-L1, backing off the extrusion plate, and adding a gasket with a total thickness of <delta> L, and executing a next step; if F is greater than F2, performing alarming by an assembling apparatus; enabling the extrusion plate to continually extrude the battery module until the length reaches L2; binding the battery module by a binding tape, and backing off the extrusion plate. By virtue of the manufacturing method, the extrusion pressure and the dimensions of the battery module can be accurately controlled.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a method for manufacturing a battery module. Background technique [0002] For battery packs using soft-packed lithium batteries, during the group assembly process of the battery modules inside, due to performance requirements such as anti-vibration, anti-deformation, and heat conduction, it is necessary to apply a certain extrusion force to squeeze the battery modules to make the battery Keep a certain extrusion force between the core and the battery. Due to the matching requirements of the battery module and the battery pack casing, the length of the battery pack must also be within a certain size range. Therefore, in the battery module assembly process, controlling the extrusion force between the battery module cells and the length of the battery module is a key feature of the battery module assembly process. After the battery modules are assembled, the fixing method is generally su...

AI Technical Summary

Problems solved by technology

However, it is cumbersome to bite or weld the head and tail ends of the strap on the battery module, and the control of the circumference of the strap is not very precise.

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