Patent ID: 8669006
Filing Date: 2014-03-11
Classification: H01M,Y02E,Y02P

Abstract:
1. A nonaqueous electrolyte secondary battery having an internal resistance of 10 mΩ or less as 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 a current collector and a negative electrode layer formed on one side or both sides of the current collector, the negative electrode layer comprising an active material; for intercalating lithium ions at a potential of 0.4 V or more with respect to an electrode potential of lithium, a conductive agent, and a binder; 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 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 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 a blending ratio of the active material, the conductive agent, and the binder in the negative electrode is in a range of 80 wt % or more and 95 wt. % or less of the active material, 3 wt. % or more and 20 wt. % or less of the conductive agent, and 2 wt. % or more and 7 wt. % or less of the binder.