Pulse laser welding aluminium alloy material, and battery case

摘要

This aims to provide a pulse laser welding aluminum alloy material, which can prevent the occurrence of an abnormal portion, when an A1000-series aluminum material is welded with a pulse laser, so that a satisfactory welded portion can be homogeneously formed, and a battery case. The pulse laser welding aluminum alloy material is made of an A1000-series aluminum material, and has such a porosity generation rate of 1.5 (µm2/mm) or less in the pulse-laser welded portion as is numerically defined by dividing the porosity total area (µm2), as indicated by the product of the sectional area and the number of porosities, by the length (mm) of an observation section.