Patent ID: 8470474
Filing Date: 2013-06-25
Classification: H01M,Y02E,Y02P

Abstract:
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: a metal 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; a separator interposed between the negative electrode and the positive electrode; a negative electrode lead having a first end connected to the negative electrode, the negative electrode lead being made of aluminum with a purity of 99 wt. % or more, or an aluminum alloy with an aluminum purity of 99 wt. % or more; and a negative electrode terminal attached to the outer container so as to be connected electrically to a second end of the negative electrode lead, the negative electrode terminal being made of an aluminum alloy which has an aluminum purity of 90 wt. % or more and less than 99 wt. % and which comprises 0.5 to 5 wt. % of Mg, wherein the active material in the negative electrode is a titanium-containing oxide.