BATTERY PACK AND BATTERY PACK MANUFACTURING METHOD

A battery pack manufacturing method according to an aspect of the present disclosure includes stacking battery cells, pressurizing a battery cell group provided by stacking the battery cells in a stacking direction, measuring positions of cell terminals of the battery cells included in the pressurized battery cell group, finding a center straight line passing through a center of a distribution of the positions of the cell terminals, positioning a welding jig configured to decide a position where a bus bar is pressed against at least one of the cell terminals with reference to the center straight line, and welding the bus bar that is pressed against the at least one of the cell terminals, to the at least one of the cell terminals by the welding jig.