BATTERY MODULE HAVING FLEXIBLE BUSBAR

A battery module including a plurality of battery cells arranged in a line; and a busbar electrically connecting the multiple battery cells, wherein the busbar includes a large current busbar having a central region and a peripheral region, a stepped busbar electrically connecting the central region of the large current busbar and the plurality of battery cells, and a wave busbar electrically connecting the peripheral region of the large current busbar and the plurality of battery cells.