In the power lithium-ion battery welding process, technicians select the appropriate laser and welding process parameters based on battery material, shape, thickness, tensile requirements, and more to establish reasonable welding process parameters.
Can laser welding be used in the production of lithium battery modules?
To investigate the application of laser welding in the production of lithium battery modules for electric vehicles, this study employs the finite element method to simulate the welding process of lugs and busbars in lithium batteries under different parameters.
Lithium batteries are welded using the autogenous welding process, which does not require any filler material. This process ensures that the electrodes are welded together correctly.
How does laser welding affect the temperature of lithium battery lugs?
1. The heat during the laser welding of lithium battery lugs is distributed centrally within the weld region, resulting in a significant temperature gradient in front of the molten pool and a smaller gradient at the rear. During the cooling process after welding, the temperature decreases rapidly within 5 s.
How is the temperature field simulated with varying welding heat inputs?
The temperature field is simulated with varying welding heat inputs to examine the distribution of stress during welding and residual stress patterns in the weldments, as well as the deflection of the weldments under different welding parameters.