Slurry coating device for lithium ion battery

Abstract

A slurry coating device for a lithium ion battery comprises a fixing frame (1), a scraper (2) and a feeding baffle (3). The fixing frame is composed of a rectangular fixing frame body (1-1) and triangular supporting plates (1-2) on both sides. A scraper height adjusting groove (1-3) and a feeding baffle height adjusting groove (1-4) are specially designed in each triangular supporting plate. The scraper height adjusting grooves (1-3) can realize the coating of slurry of different thicknesses, and the feeding baffle height adjusting grooves can realize semi-automatic feeding. According to the slurry coating device for the lithium ion battery, the conductive slurry coating is performed on current collectors of different specifications without frequent feeding; the method of adjusting the grooves and fixing nuts is adopted to realize the coating of the slurry of different thicknesses, so that the inaccurate coating thickness caused by the aging of an existing scraper spring is avoided; and the triangular support plate arc and graphite coating design minimizes the frictional resistance between the coating device and the current collectors, it is ensured that the scraper can be directlyplaced on the current collectors, and the problem of fluid wrinkles or damage of the current collectors is solved.

Description

technical field [0001] The invention relates to a slurry coating device, in particular, the invention relates to a lithium ion battery slurry coating device. Background technique [0002] In the preparation process of lithium batteries, slurry coating is an indispensable link. When evaluating the electrochemical performance of the material, we need to make the material into a conductive paste, and evenly coat it on the current collector (copper foil or aluminum foil) to make a negative pole piece or a positive pole piece, and finally assemble it into a button shape Or full battery for material evaluation, and applicator is necessary equipment. [0003] At present, there are two kinds of applicators on the market, one is adjustable coating thickness, and the other is fixed coating thickness. [0004] The invention patent "a dimple coating device" with the application number "201410083439.5" discloses a dimple coating device. On the basis of the original one material stopper...

AI Technical Summary

Problems solved by technology

[0006] However, in the specific test process, sometimes it is necessary to coat current collectors with different specifications and sizes, and sometimes it is necessary to leave blank solder tabs, and the above-mentioned scrapers are directly coated with conductive paste on the current collectors, and different specifications and sizes are used. When collecting fluid, it is necessary to purchase the corresponding spreader or cut the current collector to fit the size of the existing spreader in advance, which is time-consuming, costly and labor-intensive

[0007] In addition, the above-mentioned scraper does not have a one-time feeding chamber, and needs to be refilled, which may easily cause material breakage or obvious traces of continuous material on the current collector (the contact area is thicker than its area), which will cause lithium precipitation in the battery during charging and discharging. , which greatly affects the capacity and service life of the battery

Images