| 摘要 |
A cylindrical lithium rechargeable battery has an anode tab that is welded to a lower surface of a cylindrical case through laser welding. The cylindrical lithium rechargeable battery includes a cylindrical electrode assembly formed at a center portion thereof with a space section and including a cathode plate, an anode plate, a separator interposed between the cathode plate and the anode plate, a cathode tab that is coupled with an end of the cathode plate, and an anode tab that is coupled with an end of the anode plate. The battery also comprises a cylindrical case including a cylindrical sidewall that forms a space to receive the cylindrical electrode assembly therein and a lower wall that is provided at a bottom of the cylindrical sidewall and a cap assembly that is coupled with an upper portion of the cylindrical case and has a terminal section that is coupled with the cylindrical electrode assembly. In addition, a center pin is installed in the space section of the cylindrical electrode assembly, wherein the anode tab is coupled with an inner center portion of the lower wall of the cylindrical case by laser welding.
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