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

Disclosed herein are a method of manufacturing a secondary battery, a secondary battery, a battery module including the same, a battery pack, and a vehicle. The secondary battery may include an electrode assembly and a current collector. The electrode assembly may include an electrode portion, and first and second foil tabs formed on the electrode portion. The current collector may include a first current collecting portion welded to the first foil tabs and a second current collecting portion welded to the second foil tabs. The first foil tabs may be bent in one direction toward the first current collecting portion, and the second foil tabs may be bent in a direction opposite to that of the first foil tabs toward the second current collecting portion. The present disclosure may prevent occurrence of unwelded portions in some foil tabs when welding a large number of foil tabs and the current collector.