Preparation device of main-grid-free battery string

The invention discloses a preparation device for a main-grid-free battery string. The preparation device comprises an unwinding mechanism, a guide mechanism, a cutting mechanism, a gluing mechanism and a clamping mechanism which are sequentially arranged in the unwinding direction of a welding strip, a transmission mechanism is arranged below the clamping mechanism; a battery piece feeding mechanism and a pressing block feeding mechanism are arranged on one side of the transmission mechanism; the gluing mechanism is used for conducting staggered gluing on the front face and the back face of the welding strip. The gluing mechanism is arranged, the front face and the back face of the welding strip are glued through the gluing mechanism, the clamping mechanism is matched with the battery piece feeding mechanism to place the battery pieces on the conveying mechanism in series through the welding strip, the welding technology of the main-grid-free battery pieces is simplified, meanwhile, the compatibility is high,