Roll coating device for lithium batteries

Abstract

The invention belongs to the technical field of lithium batteries, and particularly relates to a roll coating device for the lithium batteries. The roll coating device for the lithium batteries comprises a liquid containing shell body, a scraper, a coating roller, a charging tray and a back roller. According to the roll coating device for the lithium batteries, a first removing block and a secondremoving block slide up and down, so that on the one hand, the effect that bubbles in slurry gathered at the upper end of a position where the outer circle face of the back roller and the outer circleface of the coating roller are close to each other are extruded is achieved, and on the other hand, the effect that the slurry is vibrated is achieved through movement of the two removing blocks, thebubbles in the vibrated slurry are extremely easy to discharge, and the phenomena that air entrainment exists and a plurality of tiny bubbles are exist on the surface of a coating due to a relativelylarge gap between the coating roller and the back roller and a relatively high coating speed in the coating process can be avoided to a certain extent; and in the sliding process of the bubble removing blocks, through the first removing block and the second removing block which are opposite in movement direction and alternately and sequentially installed in the same number, the stability of the pressure of slurry gathered at the upper ends of the position where the outer circle face of the back roller and the outer circle face of the coating roller are close to each other can be guaranteed, and the uniformity of the coating thickness is guaranteed.

Description

[0001] Technical field [0002] The invention belongs to the technical field of lithium batteries, in particular to a roll coating device for lithium batteries. Background technique [0003] In the manufacturing process of lithium batteries, slurry coating is the next process after the preparation of slurry is completed. The main purpose of this process is to evenly coat the slurry with good stability, good viscosity and good fluidity on the positive and negative sides. on the pole collector. Electrode coating is of great significance to the capacity, consistency, and safety of lithium batteries. [0004] The existing coating methods are roughly divided into three types: [0005] The first, blade coating, is generally used in laboratory equipment. [0006] The second type is the slit extrusion type, which is generally used for power batteries. [0007] The third type is the roller coating transfer method, which is generally used in places where more lithium batteries are c...

AI Technical Summary

Problems solved by technology

If the gap is relatively large, air entrainment will easily occur when the coating speed is high, and there will be many tiny bubbles on the coating surface.

[0009] Sometimes in order to increase the output, the coating speed is increased, and the air entrainment problem also occurs. In order to eliminate this problem, the operation method of reducing the gap is adopted, but the gap is too small, so that the coating roller and the back roller squeeze each other, and the additional The load on the motor and reducer is greatly increased, causing abnormal wear and tear

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