ELECTRODE TAB WELDING DEVICE AND ELECTRODE TAB WELDING METHOD

An electrode tab welding device according to an embodiment of the present invention may weld a plurality of electrode tabs of an electrode assembly. The electrode tab welding device may include: a pair of tab guides that gather the plurality of electrode tabs; a pair of aligning rollers that rotate in a direction, in which the outermost electrode tab is pushed toward the electrode assembly, while pressing the plurality of electrode tabs gathered by the pair of tab guides; and a welding part that welds the plurality of electrode tabs, which are aligned by the pair of aligning rollers, to each other.