Method of coating battery electrode plates

Abstract

The invention discloses a method of coating battery electrode plates, belongs to the technical field of battery electrode processing, and solves the problems that a homogenizing process in existing battery electrode plate coating is complex and electrode plates have poor performance. The method herein includes the steps of A, selecting a current collector, and applying conductive paste to the surface of the selected current collector to form a conductive glue coating layer on the surface of the current collector; B, spraying positive activated material powder or negative activated material powder to the surface of the conductive glue coating layer; C, drying the sprayed plate, and rolling to obtain the corresponding battery electrode plate. The method herein has the advantages of simplified process and good plate performance.

Description

technical field [0001] The invention relates to a coating method for battery electrode pole pieces, and belongs to the technical field of battery pole piece processing. Background technique [0002] At present, the existing production process of battery electrode pole pieces mainly includes processes such as glue making, material mixing (homogenization), coating, baking and rolling. The homogenization process of mixing agent and other additives with glue, that is to say, the homogenization process is one of the most important steps in the whole battery production process in the processing process of the existing electrode pole piece, and the excellent quality of the slurry Inferiority directly affects the performance of the battery cell. In addition, the homogenization process takes a lot of time, which affects the production capacity of the entire battery cell production. In order to avoid some defects of the homogenate and avoid the need to consume a large amount of energ...

AI Technical Summary

Problems solved by technology

Although this method avoids the pollution of the environment by the solvent, it still needs a process of uniformly mixing the positive active material or the negative active material. More importantly, it is difficult to ensure that the powder is mixed evenly by using pure powder mixing, which is easy to cause The quality of the pole piece is reduced, and the pure powder is used in the process of powder spraying. Since the powder is very light, the powder will fall under a small disturbance, and it is difficult to fix it on the current collector. The powder on the current collector cannot be guaranteed. amount, thus affecting the quality of the pole piece; at the same time, it needs to be cured in the later stage, which is essentially equivalent to the slow melting of the binder, so that there will be a large number of voids and air bubbles in the pole piece, showing that the pole piece is exposed foil , so that the electrical conductivity is deteriorated or the pole piece is broken or dropped during the die-cutting or winding process of the pole piece in the later stage