Spot welding device for assembling lithium battery

The utility model relates to the technical field of lithium battery processing equipment, and discloses a spot welding device for assembling a lithium battery, which comprises a fixed base, supporting plates mounted at four corners of the upper end of the fixed base through supporting columns, rotating shafts mounted on two sides of the lower ends of the supporting plates through fixed plates, and welding heads mounted on the rotating shafts through lifting parts. A rotating shaft is rotatably mounted at the upper end of a fixed base, a workbench is fixedly mounted at the top of the rotating shaft, a plurality of working holes are formed in the upper side edge of the workbench, clamping plates are connected to the inner walls of the working holes through a plurality of clamping springs, fixed ring teeth are fixedly mounted at the lower side edge of the workbench, and single-tooth gears are meshed with the inner sides of the fixed ring teeth; a transmission shaft is fixedly installed in the center of the singl