Patent ID: 7858225
Filing Date: 2010-12-28
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A cylindrical lithium secondary battery comprising: an electrode assembly including a first electrode plate comprising a first charge collector having a longitudinal axis extending in a first direction and a first electrode tap having a longitudinal axis extending in a second direction substantially perpendicular to the first direction, wherein the first electrode tap protrudes from the first electrode plate, a second electrode plate comprising a second charge collector having a longitudinal axis extending in the first direction and a second electrode tap having a longitudinal axis extending in the second direction, wherein the second electrode tap protrudes from the second electrode plate, and a separator between the first electrode plate and the second electrode plate, the first electrode plate, the second electrode plate and the separator being wound; a case housing the electrode assembly; and a cap assembly sealing the case and comprising a deformable safety vent, wherein the first electrode tap electrically contacts the deformable safety vent; wherein the first electrode tap and the second electrode tap each have a bar imparted radius of curvature.