Patent ID: 9608255
Date: 2017-03-28
CPC Classifications: H01M,Y02E,Y02P

Claim:
1. A nonaqueous electrolyte secondary battery having an internal resistance of 10 mΩ or less at an alternating-current impedance value of 1 kHz, comprising: an outer container; a nonaqueous electrolyte housed in the container; a positive electrode housed in the container; a negative electrode housed in the container and comprising an active material for intercalating ions at a potential of 0.4 V or more with respect to an electrode potential of lithium: a separator interposed between the negative electrode and the positive electrode; and a negative electrode terminal extending from the inside of the outer container to the outside so as to be connected electrically to one end of the negative electrode, the negative electrode terminal being made of an aluminum alloy consisting of 90 wt. % or more and less than 99 wt. % of Al, 0.5 to 5 wt. % of Mg. 0.3 to 2.0 wt. % of Mn, and 0.1 wt. % or less of at least one metal selected from Cu, Fe, Si and Cr.