| 摘要 |
<p>Provided is an aluminum alloy sheet for a cell case and a method for manufacturing said sheet. The aluminum alloy sheet comprises an aluminum alloy containing 0.7 to 1.6% of Mn, 0.5 to 0.7% of Cu, and 0.2 to 0.5% of Mg, the Cu content being greater than the Mg content, and the total amount of one to two or more of Cr, Ni, and V being 0 to 0.2%. As unavoidable impurities, the Fe content is restricted to 0.2% or less and the Si content is limited to 0.15% or less, the remainder comprising unavoidable impurities other than Al, Fe, and Si. An Al-Cu-Mg-based precipitate with a circle equivalent diameter of 0.01 to 0.1μm has a distribution of 10/μm3 in the metal structure. The tensile strength is 250 N/mm2 or greater and the elongation is 1.3% or greater after plastic working when the thickness is reduced by 50%. Tensile strength (N/mm2) × elongation (%)≥420. The aluminum alloy sheet for a cell case and the method for manufacturing said sheet provide excellent laser welding performance and blister resistance, while combining stable formability and resistance to push-in at a high level even in wide cases.</p> |
