CURRENT COLLECTOR, AND BATTERY CELL, BATTERY PACK AND VEHICLE INCLUDING SAME

A battery cell according to one embodiment of the present disclosure includes an electrode assembly in which a first electrode, a second electrode, and a separator interposed therebetween are wound around a winding axis, wherein the first electrode includes a first uncoated portion that is not coated with an active material layer at a long side end along the winding direction and is exposed to the outside of the separator, and at least a part of the first uncoated portion is used as an electrode tab in itself; a battery housing including an opening on one side and configured to accommodate the electrode assembly through the opening; a cell terminal configured to pass through a surface positioned on an opposite side of the opening of the battery housing; and a current collector including a first uncoated portion coupling part disposed on one side of the electrode assembly and configured to be welded to the first uncoated portion, a terminal coupling part spaced apart from the first uncoated portion coupling part and configured to be welded to the cell terminal, and a connection area provided between the first uncoated portion coupling part and the terminal coupling part, wherein the connection area includes a plurality of slits spaced apart at regular intervals in the circumferential direction and having a convex shape toward an outer side in the radial direction.