Lithium battery coating method

Abstract

The invention discloses a lithium battery coating method. The method comprises the steps of: when the A side of a base material layer is coated with a first active material layer, error correction isperformed on transportation of the base band by taking a first error correction reference line as the transportation central line through a first error correction device, wherein the first correctionreference line is the central line of the base material layer; and when the B side of the base material layer is coated with a second material layer, error correction is performed on the transportation of the base band coated with the first active material layer by taking a second error correction reference line as the transportation central line through a second error correction device, wherein the second correction reference line is the central line of the first active material layer. According to the invention, alignment degree of end faces of active materials of the two faces of the base material layer can be improved; coating tolerance is reduced; process capability of negative electrode edge ceramic width is improved; defective ratio is reduced; and safety performance of lithium battery products is improved.

Description

technical field [0001] The invention relates to a lithium battery coating method. Background technique [0002] At present, battery capacity is gradually pursuing excellent design, squeezing out redundant space, and increasing the amount of effective active materials. Among them, the width of the cathode active material layer is gradually becoming smaller, and the specification range of the active material is becoming narrower, resulting in poor width of the active material layer. Gradually increase. There are many factors affecting the poor width of the active material layer, such as excessive coating film width, A / B surface misalignment, insufficient die-cutting deviation correction ability, etc. Among them, the A / B surface misalignment accounts for more than 50% of the defective ratio, which needs to be improved urgently. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provid...

AI Technical Summary

Problems solved by technology

[0002] At present, battery capacity is gradually pursuing excellent design, squeezing out redundant space, and increasing the amount of effective active materials. Among them, the width of the cathode active material layer is gradually becoming smaller, and the specification range of the active material is becoming narrower, resulting in poor width of the active material layer. Gradually increase

Images