Patent ID: 8383262
Filing Date: 2013-02-26
Classification: H01M,Y02E,Y02P

Abstract:
1. A lithium secondary battery comprising a battery cell formed by stacking a plurality of full cells or bicells, each full cell having a structure of cathode/separator/anode as a unit electrode assembly, and each bicell having a structure of cathode(anode)/separator/anode(cathode)/separator/cathode(anode) as a unit electrode assembly, wherein (i) a cathode active material or (ii) an anode active material or (iii) a cathode active material and an anode active material in two or more unit electrode assemblies are configured to have a different composition to induce at least one voltage difference between two or more voltages, each of the two or more voltages provided by a different one of the two or more unit electrode assemblies and separate electrode terminals are installed in a battery case according to the at least one voltage difference to thereby simultaneously provide the two or more voltages in a single battery.