Novel power battery module side seam welding clamp

The utility model provides a novel power battery module side seam welding clamp. The device comprises at least one group of first air cylinders, two rack plates, a square tube frame, two U-shaped guide rods, a rotating mechanism, a clamping mechanism and a deviation rectifying mechanism, at least one group of first air cylinders are arranged on the first surfaces of the two rack plates; the two U-shaped guide rods are symmetrically arranged on the second surfaces, opposite to the first surfaces, of the two rack plates correspondingly. Piston rods of at least one set of first air cylinders penetrate through the two rack plates and are fixed to the square tube frame. The square tube frame is in sliding connection with the two U-shaped guide rods, the rotating mechanism is located between thetwo rack plates and is in micro-motion connection with the square tube frame, the clamping mechanism is arranged at the end, away from the second surface, of the rotating mechanism, and the deviationrectifying mechanism is l