BATTERY CELL AND METHOD FOR MANUFACTURING BATTERY CELL

Provided is a battery cell including of: an electrode tab assembly in which a plurality of electrode tabs extending from a plurality of electrode plates to one side are stacked; a case in which the plurality of electrode plates are accommodated; and a lead tab electrically connected to the electrode tab assembly and having at least a portion exposed to the outside of the case. The electrode tab assembly includes: a first connection part formed by welding and coupling at least some of the plurality of electrode tabs to each other, and a second connection part extending from the first connection part and welded and coupled to the lead tab, wherein the number of electrode tabs constituting the second connection part is smaller than the number of electrode tabs constituting the first connection part.