Patent ID: 8551645
Filing Date: 2013-10-08
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A cylindrical lithium rechargeable battery comprising: a can comprising a cylindrical surface plate having an upper end and a lower end, and a lower plate on the lower end; an electrode assembly in the can and comprising a cathode plate, an anode plate facing the cathode plate, and a separator located between the cathode plate and the anode plate; a cap assembly on the upper end of the can; an insulation plate directly contacting the separator at a first end of the electrode assembly; and a cathode tap connecting the cathode plate to the cap assembly; and an anode tap directly coupled to the anode plate and protruding through the insulation plate and connecting the anode plate and the lower plate, wherein the lower plate comprises a group of protrusions comprising at least three protrusions contacting the anode tap, wherein each of the protrusions has a width of 1.0 mm or less to minimize a contact area of each of the protrusions with the anode tap.