Lithium battery cell-clamping and film-flattening device

Abstract

The invention discloses a lithium battery cell-clamping and film-flattening device. The lithium battery cell-clamping and film-flattening device comprises a cell-clamping assembly and a supporting assembly, wherein the supporting assembly comprises a supporting block used for supporting a cover plate; the cell-clamping assembly comprises cell clamping plates which are arranged on the two side edges in the length direction of the supporting block; a film flattening conveying belt is arranged on the plate surfaces of the cell clamping plates, wherein the driving direction of the film-flatteningconveying belt is perpendicular to the length direction of the supporting block; in the process of cell clamping, the running direction of the film-flattening conveying belt is from the inner end to the outer end of the cell clamping plates; and the film-flattening conveying belt constantly constrains an insulating film, and applies external force to enable the insulating film in a flattened and smoothened state until a cell is completely clamped by the two cell clamping plates. The lithium battery cell-clamping and film-flattening device has the following advantages that in the process of cell clamping, the film flattening action of the insulating film can be realized automatically; by virtue of the device, cell clamping and film flattening can be realized at the same time by means of pure mechanical action; the operation is simple and reliable; and the whole process is free of damage to the cell, and the product quality is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a lithium-ion battery core-combining film driving device. Background technique [0002] At present, the assembly of lithium battery square batteries mostly adopts the ultrasonic butterfly welding process: the tabs 101 of the two batteries 10 face each other, and a connecting piece 103 is respectively placed under the positive and negative tabs, and then placed on the top of the positive and negative tabs respectively. Place a protective sheet 104, and finally use an ultrasonic welding machine to align the ultrasonic welding mark 102 to weld the connecting sheet 103, the tab 101, and the protective sheet 104 together; the insulating film 106 is matched with the cover plate 105; 10 is placed on the insulating film 106, and then the connecting piece 103 and the cover plate 105 are welded together by laser welding and aligned with the laser welding mark 1031...

AI Technical Summary

Problems solved by technology

[0003] However, the current difficulty in core assembly is that during the process of core assembly, the insulating film is always in a free and unrestrained state. Affected by gravity, the insulating film cannot be flattened or smoothed, so that the insulating film frequently appears on the glued cells. Convexity

This phenomenon will directly affect the back-end shelling, top cover welding and other processes, and there will be undesirable problems such as shelling scratches and welding explosion points. This is the bottleneck of battery assembly that needs to be solved urgently.

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