Roller press for producing pole piece of aluminum shell lithium ion battery

Abstract

The invention discloses a roller press for producing a pole piece of an aluminum shell lithium ion battery. The roller press comprises two supporting bases which are vertically arranged; an upper pressing roller and a lower pressing roller are mounted between the two supporting seats in a sliding manner; a driving mechanism is respectively mounted at one end of the upper pressing roller and one end of the lower pressing roller; the driving mechanism drives the upper pressing roller and the lower pressing roller to rotate in opposite directions; the two ends of the upper pressing roller and thetwo ends of the lower pressing roller are each sleeved with a pressing assembly. A calendering area is reserved in the middle of the upper pressing roller and the lower pressing roller through the pressing assembly; an adjusting assembly for driving the pressing assembly to slide horizontally is mounted at one end of the pressing assembly; the pressing sleeve is arranged for extending the tab part of the pole piece so that the material attaching area of the pole piece and the tab part keep relatively consistent extensibility, the tab part is further prevented from wrinkling and breaking and the device can be used for producing pole pieces of different specifications due to the arrangement of the adjusting assembly.

Description

technical field [0001] The invention relates to the technical field of lithium battery production equipment, in particular to a rolling machine for producing pole pieces of aluminum-cased lithium-ion batteries. Background technique [0002] The production process of lithium-ion batteries is roughly divided into four parts: production, assembly, liquid injection and packaging. The pole pieces of lithium-ion batteries are based on aluminum foil and copper foil, coated with active materials, and then rolled and cut into pieces. Rolling is an important link in the production process of battery pole pieces. The compactor is done. The purpose of rolling is to make the active material more dense and uniform in thickness, but in actual operation, both copper foil and aluminum foil have a certain degree of continuous ductility. During the rolling process, the active material will be compacted by double rollers, and the active material will also The foil is squeezed to cause a sligh...

AI Technical Summary

Problems solved by technology

The purpose of rolling is to make the active material more dense and uniform in thickness, but in actual operation, both copper foil and aluminum foil have a certain degree of continuous ductility. During the rolling process, the active material will be compacted by double rollers, and the active material will also The foil is squeezed to cause a slight extension of the foil; at the same time, the tab part of the foil that is not attached to the active material is not in contact with the double rollers of the roller press, so that no secondary extension occurs; then the tab part is caused The extension degree of the foil attachment area is not uniform, forming wavy wrinkles on the edge of the foil in appearance, and the parallel wave traces are perpendicular to the movement direction of the foil; the active material attached to the wrinkled foil is prone to cracking, Protrusion or falling off; slight condition can be removed by subsequent cutting steps, but serious condition can easily cause the entire pole piece to be scrapped

Images