Power battery welding machine

The utility model discloses a power battery welding machine which comprises a supporting platform and a welding frame, the welding frame is installed at the upper end of the supporting platform, and a welding fixing structure is arranged at the upper end of the supporting platform. The welding fixing structure comprises a sliding way, a sliding platform, a sliding air cylinder, two fixing plates and two contraction clamping assemblies. The utility model relates to the technical field of welding equipment, a welding fixing structure is adopted, in the actual use process, the clamping plate is pushed through the stretching force of a spring, the fixing force of a battery is guaranteed, meanwhile, the damage to the surface of the battery can be effectively avoided, and meanwhile, an adopted contraction air cylinder is matched with an electromagnet, so that the welding efficiency is improved. And the clamping plates are pulled to move towards the outer side, so that the batteries are conveniently taken, and a sli