Rechargeable battery

An embodiment provides a rechargeable battery including: an electrode assembly formed by winding a first electrode, a separator, and a second electrode; a case accommodating the electrode assembly; an electrode terminal installed at a first opening at one side of the case in an insulated state; a first collector plate connecting the first electrode to the electrode terminal; the exhaust plate seals a second opening in the other side of the shell; a second collector plate connecting the second electrode to the curled portion of the case on the inner side of the exhaust plate; and a gasket interposed between the second collector plate and the exhaust plate and between the second collector plate and the case to perform a sealing action by a crimped portion connected to the crimped portion, in which the second collector plate includes: a base portion provided on an uncoated portion of the second electrode; a bottom welding portion extending in a radial direction from the base portion and welded to an uncoated por