Patent ID: 9136508
Filing Date: 2015-09-15
Classification: H01M,Y02E,Y02P

Abstract:
1. A secondary battery, comprising: an electrode assembly in which a cathode plate having a cathode tab, an anode plate having an anode tab, and a separator are stacked alternately; a battery case accommodating the electrode assembly; and an anode lead electrically connected to the anode tab, wherein the cathode tab is defined by an elongate extension of the cathode plate integrally formed therewith, and wherein the anode tab is defined by an elongate extension of the anode plate integrally formed therewith, wherein the battery case is sealed with the electrode assembly accommodated therein, the anode lead is exposed out of the battery case, and the cathode tab is exposed out of the battery case without being connected to a cathode lead, wherein the cathode tab is plated with a metal plating layer having higher electric conductivity than the cathode tab, the metal plating layer being disposed on only a portion of the cathode tab which is exposed out of the battery case, wherein the cathode tab is defined by a stack of a plurality of electrode tabs respectively connected to the cathode plate, and wherein the plurality of electrode tabs are adhered to each other by a linear weld extending along a width direction of the stack.