Abstract: The galvanometer welding was carried out by using fiber laser on the parts of the battery module of aluminum alloy. The effects of different welding parameters on weld shaping were studied. The influence of wobbling laser beam on the welding porosity was analyzed. And the microstructures of the welded joints were analyzed and mechanical properties were tested. At the same time,the comparisons with no-wobbling laser beam welding were carried out. The results show that the welding of aluminum alloy battery module can be realized by galvanometer welding,and there are no surface and internal porosity. the maximum tension can be up to 24. 54 k N for the welded joint with 66 mm in length,which reflects the advantages of scanning galvanometer welding.