High-strength aluminum-copper-manganese-magnesium-samarium alloy for lithium ion battery shell

• Main Authors: HAN YUYIN, WU ZHANLIN, DING DONGYAN, HUANG YUANWEI, YOU XIAOHUA, CHEN GUOZHEN, TANG JINGSONG, ZHANG WENLONG, GAO YONGJIN, CHEN RENZONG, DU JIANDI, ZHANG RONG
• Format: Patent
• Language: Chinese; English
• Published: 13.03.2018
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a high-strength aluminum-copper-manganese-magnesium-samarium alloy for a lithium ion battery shell. The alloy comprises, 1.4 wt% -1.6 wt% of Cu, 1.2 wt% -1.4 wt% of Mn, 0.7 wt%-0.9 wt% of Mg, 0.3 wt% -0.5 wt% of Fe, 0.2 wt% -0.6 wt% of Sm and the balance aluminum and inevitable impurities. Through multi-element microalloying and heat treatment, a large number of Al10Cu7Sm2and Al2CuMg enhanced phases are formed in the aluminum-copper-manganese-magnesium-samarium alloy, the comprehensive performance of the aluminum-copper-manganese-magnesium alloy is obviously improved,the tensile strength of an aluminum-copper-manganese-magnesium-samarium alloy panel is larger than 300 MPa, the ductility is larger than 5%, and the corrosion potential of the aluminum-copper-manganese-magnesium-samarium alloy panel can be greatly regulated, controlled and improved according to the samarium content; and the cup drawing forming performance and the high-temperature strength of thepanel are superior to those