Pole piece processing technology

Abstract

The invention discloses a pole piece processing technology, which comprises the steps as follows: front and back continuous coating is carried out on a pole piece; blank areas are arranged at two sides of each coating area; the coating areas on the front surface and the back surface of the pole piece are symmetric; after coating is completed, the blank areas on the front surface and the back surface of the pole piece are coated with adhesive layers respectively; after the pole piece is dried and the adhesive layers are solidified, the pole piece is rolled, meanwhile, infrared heating is carried out on the blank areas of the rolled pole piece and the heated adhesive layers are stripped from the blank areas; and the adhesive layers of the blank areas are sucked at negative pressure and the adhesive layers are collected, heated and melted and repeatedly used for gumming the blank areas. The blank areas on the front surface and the back surface of the pole piece are coated with the adhesive layers respectively; the pole piece is rolled; meanwhile, infrared heating is carried out on the blank areas of the rolled pole piece; and the adhesive layers can be recycled and repeatedly used. According to the pole piece processing technology, the condition that the elongation rate of each blank area is similar to that of each coating area after the pole piece is rolled is ensured, so that the problem of wrinkling at the junctions of the blank areas and the corresponding coating areas of the pole piece is solved; the yield of rolling and subsequent processes is improved; and the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a pole piece processing technology. Background technique [0002] The traditional coating method is gap coating, that is, there will be a horizontal gap between the coating areas for welding tabs, but this method will lose part of the battery capacity. At present, more and more continuous coatings are used. Coating method: There is a vertical blank between the coating areas, and the current collector in the vertical blank is used to make tabs, which not only ensures the capacity of the battery but also takes into account the flow capacity. However, during the rolling process, the elongation of the blank area and the coating area of ​​the pole piece produced by this coating method is different, which will cause wrinkles at the junction of the blank area and the coating area, and the pole piece will appear serpentine, and then Cause many problems such as broken belt and pole piece...

AI Technical Summary

Problems solved by technology

However, during the rolling process, the elongation of the blank area and the coating area of ​​the pole piece produced by this coating method is different, which will cause wrinkles at the junction of the blank area and the coating area, and the pole piece will appear serpentine, and then Cause many problems such as broken belt and pole piece burr

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