Soft package power lithium battery defect tab welding structure

Abstract

The invention discloses a soft-package power lithium battery defective tab welding structure, and belongs to the technical field of batteries, the soft-package power lithium battery defective tab welding structure comprises a battery main body, sealing grooves are formed in the two sides, close to the center, of the front end of the battery main body respectively, and the two sealing grooves are symmetrical about the central axis of the battery main body; four sliding grooves are formed in the positions, close to the two sides, of the interior of the battery body correspondingly, every two sliding grooves are symmetrical about the center axis of the battery body, an ablation piece is fixedly connected to the center of the inner wall of the left end of the sealing groove, the right ends of the sliding grooves penetrate through the left end of the sealing groove, and clamping grooves are formed in the centers of the two ends of the sealing groove correspondingly; the two groups of clamping grooves are symmetrical about the central axis of the sealing groove; according to the invention, the defective tabs of the polymer battery core can be replaced and connected, the production and application of the tabs of the battery core are realized, the normal connection of the battery can be completed, the tabs can be prevented from loosening easily in the welding process, and the welding position precision is improved.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to a welding structure for a defective tab of a soft pack power lithium battery. Background technique [0002] At present, for lithium-ion polymer battery cells, the defect of the positive and negative tabs of the battery will make the battery unusable. At the same time, the positive pole of the pouch battery is currently made of pure aluminum material, which cannot be directly welded with wires or tin wires. , it is necessary to remove the defective tabs of the battery core and perform extended welding, so that after the nickel sheet is welded, it is convenient to connect wires, tin wires and other materials; important; [0003] After searching, Chinese Patent No. CN201910781589.6 discloses a welding structure and a welding method for tabs. Although this invention can reduce the metal particles remaining inside the battery and reduce the probability of short-circuiting the batter...

AI Technical Summary

Problems solved by technology

[0002] At present, for lithium-ion polymer battery cells, the defect of the positive and negative tabs of the battery will make the battery unusable. At the same time, the positive pole of the pouch battery is currently made of pure aluminum material, which cannot be directly welded with wires or tin wires. , it is necessary to remove the defective tabs of the battery core and perform extended welding, so that after the nickel sheet is welded, it is convenient to connect wires, tin wires and other materials; important;

[0003] After searching, Chinese Patent No. CN201910781589.6 discloses a welding structure and a welding method for tabs. Although this invention can reduce the metal particles remaining inside the battery and reduce the probability of short-circuiting the battery, it cannot prevent the polymer battery core from being damaged. In addition, the existing welding structure and the welding method of the tab are prone to loosening of the tab during the welding process, resulting in low accuracy of the welding position; therefore, we propose a welding structure for the defective tab of the soft pack power lithium battery

Images