| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an aluminum alloy sheet for battery cases, which is excellent in formability necessary in battery case production, can assure sufficient case strength after being formed, and has excellent weldability. <P>SOLUTION: The aluminum alloy sheet for battery cases comprises 0.5-1.5 mass% Mn, 0.2-1.5 mass% Mg, 0.1-1.0 mass% Cu, and the balance comprising Al and unavoidable impurities, and is an O-grade material (annealed material) having a proof stress of 40-100 MPa. This aluminum alloy sheet is formed into a battery case, and the formed battery case and a lid are welded together by continuous-wave laser welding. This aluminum alloy sheet contains, as additive elements or as the unavoidable impurities, 0.6 mass% or less Si, 0.8 mass% or less Fe, 0.02 mass% or less Ti, 20 mass ppm or less B, 0.15 mass% or less Zr, 0.40 mass% or less Cr, and 0.3 mass% or less Zn. <P>COPYRIGHT: (C)2013,JPO&INPIT |
