Production equipment for three-layer co-extrusion membrane of lithium battery

Abstract

The invention relates to the technical field of production of lithium battery membranes and discloses production equipment for a three-layer co-extrusion membrane of a lithium battery. The equipment comprises an extrusion platform, a first power motor, a second power motor, a first screw extruder, a second screw extruder, a curtain coating platform, a melt pump, a curtain coating machine, a swingdevice, a pulling device, a rolling device, a metal separator and a three-cavity mold. The bottoms of the first power motor, the second power motor, the first screw extruder and the second screw extruder are fixedly connected to the top of the extrusion platform separately, and the output ends of the first power motor and the second power motor are in transmission connection with the input ends ofthe first screw extruder and the second screw extruder respectively. According to the production equipment, the problem is solved that after being extruded, the raw materials are easily moved in different layers. The raw materials are evenly distributed after being extruded by the extruders, the overall raw materials are homogenized, the fluidity of the extruded raw materials can be improved, andthe effect of plastifying the raw materials is improved.

Description

technical field [0001] The invention relates to the technical field of lithium battery diaphragm production, in particular to a three-layer co-extruded diaphragm production equipment for lithium batteries. Background technique [0002] In the structure of lithium batteries, the separator is one of the key inner components. The performance of the separator determines the interface structure and internal resistance of the battery, which directly affects the capacity, cycle and safety performance of the battery. A separator with excellent performance plays an important role in improving the overall performance of the battery. The main function of the diaphragm is to separate the positive and negative electrodes of the battery, prevent the two electrodes from contacting and short circuit, and also have the function of allowing electrolyte ions to pass through. The separator material is non-conductive, and its physical and chemical properties have a great influence on the perfor...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a lithium battery three-layer co-extruded diaphragm production equipment, which solves the problem that the raw materials are prone to channeling after extrusion, so that the raw materials are evenly distributed after being extruded by the extruder, and The overall raw material is uniform, and at the same time, it can improve the fluidity of the raw material after extrusion, improve the plasticizing effect of the raw material, and ensure the quality requirements of the diaphragm production

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