Automatic winding and roll changing system for wet-process lithium battery diaphragm

Abstract

The invention discloses a wet-process lithium battery diaphragm automatic winding and roll changing system which comprises a guide roller and a tension roller which are vertically arranged at an interval, a tension bearing is installed at the end of the tension roller, a pair of shearing rollers which are vertically arranged at an interval are arranged behind the guide roller and the tension roller in the advancing direction of a diaphragm, and the upper side and the lower side of the diaphragm are attached to the two shearing rollers respectively. A moving roller is arranged behind the shearing roller, a winding and reel changing mechanism is arranged behind the moving roller and comprises a driving wheel and a driven wheel driven by the driving wheel to rotate, two winding rollers with the same height position are arranged on the two sides of the axis of the driven wheel respectively, and a film scratching mechanism is arranged below the winding roller close to the driven wheel. The membrane scratching mechanism comprises a support and a driving mechanism for driving the support to move up and down, an electrostatic generator, a rotating brush, a cutter and a pressing roller are installed on the support, the driven wheel rotates during roll changing, the positions of the two winding rollers are exchanged, and a membrane sequentially bypasses the positions below the two winding rollers; when the diaphragm is scratched, the driving mechanism drives the support to move upwards, and the cutter cuts off the diaphragm.

Description

technical field [0001] The invention relates to a wet-process lithium battery diaphragm rewinding and changing system, which belongs to the technical field of lithium battery diaphragm production equipment. Background technique [0002] The main function of the lithium battery separator is to isolate the positive and negative electrodes of the lithium battery to prevent short circuit. The microporous structure of the lithium battery separator can allow the ions in the electrolyte to pass through. The performance of the lithium battery separator determines the interface structure and internal resistance of the battery, which directly affects the service life of the battery. The production process of wet lithium battery separator mainly includes feeding, extrusion, casting, double drawing, extraction, horizontal drawing and winding. In the prior art diaphragm winding equipment, the tension in the winding process is difficult to control, and after winding, the film surface wil...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies in the above-mentioned prior art, the object of the present invention is to provide a wet-process lithium battery diaphragm rewinding and changing system, which is used to solve the problems of wrinkles or slack on the membrane surface after rewinding of the diaphragm rewinding equipment in the prior art and Technical problems that cannot change rolls automatically

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