METHOD FOR MANUFACTURING SECONDARY BATTERY, SECONDARY BATTERY, AND BATTERY MODULE, BATTERY PACK AND TRANSPORTATION MEANS COMPRISING SAME

The present disclosure relates to a method of manufacturing a secondary battery, a secondary battery, a battery module including the same, a battery pack, and a vehicle. A current collector according to the present disclosure includes a slit portion in which a plurality of slits are formed in a thickness direction of an electrode assembly, and a connection portion connected to one side of the slit portion and including a support portion and a current collecting protrusion. The present disclosure may minimize wasted space in a secondary battery casing when welding a large number of foil tabs and a current collector, reduce the production cost, and enable the current collector and an electrode terminal to be easily coupled.