Cylindrical lithium-ion battery pole piece winding and deburring method

Abstract

The invention discloses a cylindrical lithium-ion battery pole piece winding and deburring method. A lithium-ion battery pole piece comprises a current collector and positive and negative active substance layers, wherein the current collector is coated with the positive and negative active substance layers through a lithium-ion battery material preparation and coating process, and then the lithium-ion battery pole piece is prepared through a rolling, continuous baking and slitting process. When the lithium-ion battery pole piece is wound and is cut by using a cutter, he positive and negative active substance layers at a cut position are adhered with adhesive tapes before winding of a single winding core is completed. The cylindrical lithium-ion battery pole piece winding and deburring method has the advantages that when the winding of the single winding core is completed rightly, the coatings are adhered with the high-temperature adhesive tapes during cutting of positive and negative pole pieces, fall of pole piece powder and burrs of cutting edges can be prevented, the battery core short-circuit situation caused by burrs piercing a diaphragm is avoided, and the cycle performance and safety performance of batteries are improved.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a winding and deburring method for pole pieces of cylindrical lithium ion batteries. Background technique [0002] With the development of modern society, various mobile devices, such as camcorders, notebook computers, portable DVDs and digital cameras, have become more and more widely used, and the demand for high-energy batteries for these mobile devices is also increasing. [0003] Lithium-ion batteries are gradually favored by people because of their outstanding advantages such as light weight, large energy storage, high power, no pollution, long life, small self-discharge coefficient, and wide temperature range, and become the best power supply for mobile devices. Even in the fields of aviation, aerospace, navigation, automobiles, medical equipment and other fields, it has gradually replaced other traditional batteries. [0004] In the manufacturing process of lit...

AI Technical Summary

Problems solved by technology

[0004] In the manufacturing process of lithium-ion batteries, it is easy to produce sticky powder burrs at the cutting place when winding the battery pole pieces. The powder burrs are easy to squeeze the pole pieces and diaphragm, causing short circuit of the battery cells and reducing the cycle of the battery. Performance and Safety Features

Images