Multi-roller calendering device

Abstract

The invention discloses a multi-roller calendering device which comprises a pressing mechanism, a gap fine-adjustment mechanism, a first pressing roller, a second pressing roller, a first calendering roller and a second calendering roller, wherein the first calendering roller and the second calendering roller are located between the first pressing roller and the second pressing roller. The first pressing roller drives the first calendering roller to rotate, and the second pressing roller drives the second calendering roller to rotate. Pressure of the pressing mechanism acts on the first pressing roller. The gap fine-adjustment mechanism is located between the first pressing roller and the second pressing roller and used for adjusting the working gap between the first calendering roller and the second calendering roller. Materials are subjected to calendering molding in the working gap. The multi-roller calendering device has the beneficial effects that pressure of the pressing mechanism acts on the corresponding pressing roller, uniform stress of the pressing rollers is applied to the calendering rollers in the longitudinal direction, the defect of uneven longitudinal arrangement of a lithium film due to the overlarge gap of the calendering rollers is overcome, and the defect of the uneven thickness of the lithium film due to deformation of the calendering rollers is also overcome.

Description

technical field [0001] The invention relates to the field of calenders, in particular to a multi-roller calendering device. Background technique [0002] In the battery production process, the lithium-replenishment process of lithium-ion battery pole pieces is the key technology to improve the capacity of lithium-ion batteries. The key to the lithium-replenishment process lies in pressing and coating. A process in which the tape is rolled into a lithium film and attached to the traction film. In the prior art, the pressure-applying mechanism is used to apply pressure to the calender roll, and the applied pressure acts on the bearing positions located at both ends of the calender roll. Since the calender roll exerts a large pressure (greater than 3T), the roll surface will produce micro The phenomenon of deformation causes the calendered lithium film to appear thick in the middle and thin at both ends, resulting in a decrease in the quality of the lithium film. If the diame...

AI Technical Summary

Problems solved by technology

In the prior art, the pressure-applying mechanism is used to apply pressure to the calender roll, and the applied pressure acts on the bearing positions located at both ends of the calender roll. Since the calender roll exerts a large pressure (greater than 3T), the roll surface will produce micro The phenomenon of deformation causes the calendered lithium film to appear thick in the middle and thin at both ends, resulting in a decrease in the quality of the lithium film

If the diameter of the calender roll is increased to meet the rigidity requirement to avoid deformation of the roll surface of the calender roll, the longitudinal arrangement of the lithium film after calendering will be uneven, which cannot meet the process requirements

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