The present thesis addresses the preliminary design of a laser welding cell for busbars in lithium-ion battery packs used in electric vehicles. The work focuses on the conceptual and functional design, aiming to define a company’s standard station that has to be modular, flexible and customizable. The main topic of this project is the preliminary study of the digital twin and virtual commissioning methods, in fact, after the three-dimensional modelling phase, the digital model of the laser welding cell is developed using software Siemens Tecnomatix Process Simulate. The principal advantage of these approaches is the possibility of cycle time evaluation, especially in complex automated line cases.