Patent ID: 9209428
Filing Date: 2015-12-08
Classification: H01M,Y02E,Y02P

Abstract:
1. A secondary battery comprising: a battery case having a case body and a cover, the battery case having a first section with the case body and cover spaced from one another, a second section having the case body and cover sealed to one another and a third section between the first and second sections; an electrode assembly mounted between the case body and cover, the electrode assembly extending in the first and third sections; and a plurality of electrode tabs in the third section, protruding from the electrode assembly, the electrode tabs connected to corresponding electrode leads, wherein the third section comprises a multiform region and a receiving part, the multiform region extending from the first section and formed by a first planar portion of the case body extending from the first section toward the cover at a first angle of inclination, and the receiving part extending between the multiform region and the second section, the receiving part formed by a second planar portion of the case body extending from the first planar portion toward the cover at a second angle of inclination, wherein the plurality of electrode tabs extend into the receiving part, wherein the first angle of inclination is smaller than the second angle of inclination, wherein the multiform region starts from a position corresponding to 5 to 15% of the total length of the electrode assembly from an upper end of the electrode assembly, and wherein the upper end of the electrode assembly is bent toward an end of the multiform region by pressure applied by the multiform region.