Pole strip side wrinkle treatment method and equipment

Abstract

The present application provides a method and equipment for treating side wrinkling of pole piece strips. The above-mentioned pole piece strip side wrinkle processing method includes winding the pole piece strip on a reel; baking the pole piece strip; unwinding the pole piece strip, and cutting off the The light foil in the light foil area on the side of the belt, wherein the pole piece belt includes a paint area and a light foil area, and the light foil area is located outside the paint area; rolling processing is performed on the pole piece belt. Before the pole strip is rolled, the pole strip is wound first, and the wound pole strip is baked to ensure that the stress on both sides of the pole strip is released. After that, the side of the pole strip is rolled The light foil is cut off, so that the thickness of the side of the pole strip is consistent, so that the ductility of the side of the pole strip is consistent, so that when the pole strip is slitting, the side of the pole strip is evenly stressed , improve the flatness of the side of the pole piece belt, and reduce the probability of wrinkling of the pole piece belt.

Description

technical field [0001] The invention relates to the technical field of lithium ion pole pieces, in particular to a method and equipment for treating side wrinkling of pole piece strips. Background technique [0002] With the development of lithium-ion battery technology, the scope of use of lithium-ion is rapidly expanding. It has the characteristics of small size, light weight and long power supply time, and has been widely used in various portable electronic devices. Among them, the output efficiency of lithium-ion electric energy and the quality of pole pieces are an important link, and pole piece rolling is an essential process for lithium-ion batteries. [0003] As people's requirements for battery power and energy density are getting higher and higher, the compaction density of the pole piece after rolling is increasing, resulting in excessive extension of the edge of the pole piece after rolling. Due to the low strength of the aluminum foil and good elongation perfor...

AI Technical Summary

Problems solved by technology

Due to the low strength of aluminum foil and good elongation performance, the elongation rate of the coating area and the light foil area are different when passing the roller, and the stress of the slitting pole piece is not released in time, and the edge of the pole piece is wrinkled, which makes the tension and tightness of the two sides of the pole piece different. Inconsistency, resulting in uneven winding and dislocation of the battery cells behind, causing fire, explosion and other hidden dangers

[0004] In the traditional pole piece production process, the coated pole piece is rolled and then overwhelmed to the target thickness specification. The pole piece is not pretreated before rolling, which leads to the slitting process. The flatness of the side of the pole piece drops sharply, that is, there are serious wrinkles on the side of the pole piece, which leads to a decrease in the pass rate of the pole piece

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