Pole piece, battery cell, battery, battery module and vehicle

• Main Author: LAI YONGFANG
• Format: Patent
• Language: Chinese; English
• Published: 27.10.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The utility model relates to the technical field of batteries, particularly provides a pole piece, a battery cell, a battery, a battery module and a vehicle, and aims to solve the problem that a diaphragm is scalded when a current collector and a tab are welded. In order to achieve the purpose, the pole piece comprises a plurality of pole lugs, after the pole piece is wound, the pole lugs are bent and stacked to form a plurality of pole lug groups, and the thickness of at least part of each pole lug group is not less than 108 microns. The current collector is welded in the area, with the thickness not smaller than 108 micrometers, of the tab set, heat radiation can be generated in the welding process of the tabs and the current collector, the tab set with the thickness larger than 108 micrometers can weaken the spreading speed of the heat radiation towards the diaphragm, and therefore the temperature of the upper edge of the diaphragm is reduced, and the heat radiation generated by welding cannot damage the d