CYLINDRICAL SECONDARY BATTERY MODULE, AND SECONDARY BATTERY PACK AND VEHICLE INCLUDING THE SAME

A cylindrical secondary battery module includes a plurality of cylindrical secondary battery cells having an electrode assembly and an electrolyte accommodated therein; a cell frame in which the plurality of cylindrical secondary battery cells are disposed; and a bus bar coupled to each of a plurality of cylindrical secondary battery cells and having a plurality of welding portions thereon. Among the plurality of welding portions, the welding portions spaced apart at larger intervals are welded to each other.