Circular power battery welding clamp

The utility model relates to the technical field of battery welding clamps, in particular to a round power battery welding clamp which comprises a base, two sliding grooves are formed in the outer wall of the top of the base, the inner walls of the two sliding grooves are connected with the same sliding seat in a sliding mode, and a round opening is formed in the outer wall of one side of the sliding seat. The inner wall of the round opening is rotationally connected with two symmetrically-arranged supporting rollers, a mounting opening is formed in the outer wall of the top of the sliding base, the inner wall of the mounting opening is fixedly connected with an electric telescopic rod, an output shaft of the electric telescopic rod is fixedly connected with a U-shaped frame, and the inner wall of the U-shaped frame is rotationally connected with a pressing wheel. The chuck structure overcomes the defects in the prior art, the driving wheel is arranged on the sliding seat, the driving wheel is matched with th