BATTERY MODULE, BATTERY PACK INCLUDING THE SAME AND METHOD OF MANUFACTURING BATTERY PACK

A battery module including a battery cell having an electrode lead protruding from an end part thereof, a cell tray on which a plurality of battery cells are mounted, and a busbar mounted on one end part of the cell tray positioned in a direction parallel to a protruding direction of the electrode lead and welded to the electrode lead. The busbar comprises a busbar plate, which is a portion welded to the electrode lead, and a busbar connection part that is formed by bending one end of the busbar plate in a direction perpendicular to a surface of the busbar plate.