Patent ID: 8119274
Filing Date: 2012-02-21
Classification: H01M,Y02E,Y02P

Abstract:
1. A lithium secondary battery comprising a battery cell formed by stacking: 1) a plurality of full cells having a structure of cathode/separator/anode, or 2) a plurality of bicells having a structure of cathode/separator/anode/separator/cathode or anode/separator/cathode/separator/anode, as unit electrode assemblies; 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 of the unit electrode assemblies are configured to have a different composition to induce a voltage difference and separate electrode terminals are installed in a battery case according to the voltage difference to thereby simultaneously provide two or more voltages by a single battery.