RECHARGEABLE BATTERY PACK

A rechargeable battery pack includes: a cell stack including a plurality of battery cells stacked in a first direction; a center frame integrally forming a first floor and a first sidewall and supporting the cell stack; and a first side frame and a second side frame integrally forming a second floor coupled to the first floor in a second direction crossing the first direction and a second side wall supporting narrow cell side surfaces of the cell stack. The first floor and the second floor include a plurality of cooling water paths extending in the first direction and spaced a distance from each other in the second direction.