In this thesis, in collaboration with company Comau, it has been experimentally studied Aluminium and Copper joint of a battery pack for Automotive Applications. The experiments leads to joints welded through Remote Laser Welding process in a dedicated laboratory in Comau, Grugliasco. In the first chapters, it has been given a literature review of Laser welding and its applications in automotive field. There have been studied three parameters : Temperature limit, Tensile Strength and Electric Resistance. Furthermore, it has been investigated a possible function relation between Tensile Strength and Electric Resistance. The tests are conducted for 3 type of Samples: 1- three layers joint ( Aluminum -Copper coated with Nickel and Copper) 2- two layers joint ( Aluminum and Copper coated with Nickel) 3- two layers joint ( Copper coated with Nickel and Copper) The output are outlined in comparative dashboards for different set of parameters for each sample joint.