Welding method capable of improving welding reliability by precisely setting welding portions of the electrode taps

摘要

The present disclosure provides a method that includes forming a tab arrangement by vertically arranging the electrode tabs whereby at least parts of the electrode tabs overlap each other; irradiating light to at least two side surfaces among side surfaces of the tab arrangement excluding surfaces on which the electrode tabs overlap and surfaces facing the overlapped surfaces; scanning a planar shape of a step on which the electrode tabs do not overlap each other using light reflected from an end portion of each of the electrode tabs; scanning only an overlapped portion of the electrode tabs excluding the step based on the scanned resu setting a welding range within the overlapped portion; and performing welding only within the welding range.