Patent ID: 7955736

Claim:
A secondary battery, comprising: a case; an electrode assembly including a positive electrode, a negative electrode, and a separator interposed therebetween, the electrode assembly being arranged within the case; a cap assembly affixed to the case and adapted to seal the case, the cap assembly being electrically connected to the electrode assembly; and a pair of current collecting plates adapted to be respectively electrically connected to the positive and negative electrodes; wherein each electrode includes an un-coated region absent an active material, the un-coated region of each electrode contacting its respective current collecting plate; and wherein each un-coated region includes a plurality of independent regions separated from one other, the plurality of independent regions being bent and affixed to their respective current collecting plate, wherein the independent regions comprise convex and concave portions arranged in a line end of their respective un-coated region in a longitudinal direction of the un-coated region.