Device for performing surface treatment on pole piece of lithium battery

Abstract

The invention discloses a device for performing surface treatment on a pole piece of a lithium battery. In one piece-brushing process, the front side and the reverse side of the pole piece can be treated simultaneously, so that the treatment efficiency can be improved and the treatment quality can be guaranteed. The device comprises a machine frame, a workbench, an upper sponge, a lower sponge, a negative pressure device and an upper sponge driving cylinder; the lower sponge is fixed on the workbench; the upper sponge driving cylinder is arranged on the machine frame; a piston rod of the upper sponge driving cylinder faces downward; the bottom of the piston rod is fixedly connected with the upper sponge; the upper sponge is positioned above the lower sponge; the negative pressure device comprises an air compressor and a suction pipe; the suction pipe is inserted upward from the bottom of the workbench; and the pipe orifice of the suction pipe is positioned in the lower sponge. The process for brushing the piece is improved, a technology for automatically brushing the two sides of the piece simultaneously is adopted, two sponge plates which are correspondingly arranged up and down are used and when dust adsorbed to the sponge plates is more, the sponge plates can be replaced at any time. The device is high in quality for cleaning the pole piece, and high in yield, and can timely remove the dust and debris and obviously improve the quality of the pole piece, and the battery manufactured by the pole piece is low in short circuit rate.

Description

technical field [0001] The invention relates to a cleaning device for the surface of a soft sheet coated with a composite material, in particular to a special processing device for cleaning the surface of a lithium battery pole piece. Background technique [0002] At present, a conventional lithium battery has a positive electrode sheet and a negative electrode sheet, which are all strip-shaped coating materials, and then wound to form a battery core, and then a casing is added to form a lithium battery. In the whole production process, the coating material will inevitably have burrs or surface protrusions in a small amount. If it is not treated, it will cause uneven thickness after winding, which will affect the quality of the battery. In order to ensure the service life of the lithium battery and improve the power storage capacity of the lithium battery, the surface of the pole piece needs to be treated to ensure its surface quality. [0003] The first method of brushing ...

AI Technical Summary

Problems solved by technology

[0003] The first method of brushing the pole piece with a sponge block is that the operator uses the method of brushing the front and back sides sequentially. During the brushing process, due to the repeated flipping of the pole piece, burrs are formed on the edge of the pole piece, which will be punctured in the next process. Diaphragm, which leads to short circuit of the cell and affects product quality; when using this traditional brush technology, the output cannot be improved. For example, if the production is 10,000 pieces / day, the production capacity of one employee is 6 hours, which seriously restricts the production speed.

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