A rechargeable battery comprising: 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 in an insulating state at a first opening on one side of the case ; a first current collecting plate that connects the first electrode to the electrode terminal ; a vent plate sealing a second opening on the other side of the case ; a second current collecting plate connecting the second electrode to a beading portion of the case at an inner side of the vent plate ; and a gasket interposed between the second current collecting plate and the vent plate and between the second current collecting plate and the case to perform a sealing action by a crimping portion connected to the beading portion , wherein the second current collecting plate comprises a base portion disposed on an uncoated portion of the second electrode , a bottom welding portion extending in a radial direction from the base portion and welded to the uncoated portion of the second electrode , and a wing welding portion spaced apart from the bottom welding portion to be connected to the base portion by an elastic portion and welded to the beading portion ; wherein the elastic portion comprises a first elastic bending portion that is connected to the base portion to be upwardly bent and then is outwardly bent based on a radial direction, and a second elastic bending portion that is connected to the first elastic bending portion to be upwardly bent and then is outwardly inclined-bent based on a radial direction to be connected to the wing welding portion . 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 in an insulating state at a first opening on one side of the case ; a first current collecting plate that connects the first electrode to the electrode terminal ; a vent plate sealing a second opening on the other side of the case ; a second current collecting plate connecting the second electrode to a beading portion of the case at an inner side of the vent plate ; and a gasket interposed between the second current collecting plate and the vent plate and between the second current collecting plate and the case to perform a sealing action by a crimping portion connected to the beading portion , wherein the second current collecting plate comprises a base portion disposed on an uncoated portion of the second electrode , a bottom welding portion extending in a radial direction from the base portion and welded to the uncoated portion of the second electrode , and a wing welding portion spaced apart from the bottom welding portion to be connected to the base portion by an elastic portion and welded to the beading portion ; wherein the elastic portion comprises a first elastic bending portion that is connected to the base portion to be upwardly bent and then is outwardly bent based on a radial direction, and a second elastic bending portion that is connected to the first elastic bending portion to be upwardly bent and then is outwardly inclined-bent based on a radial direction to be connected to the wing welding portion . <EOS>