Lamination device, lamination method and battery production line

The invention provides a lamination device, a lamination method and a battery production line, and the lamination device comprises a rack, a rotary lamination table which is rotatably arranged on the rack and is provided with a plurality of lamination positions, and the plurality of lamination positions are sequentially arranged along the circumferential direction; the discharging mechanism is arranged on the rack, and the discharging mechanism is suitable for releasing the diaphragms to the rotary stacking table; and the material grabbing mechanism is movably arranged on the rack, and the material grabbing mechanism is suitable for grabbing the pole pieces and placing the pole pieces on the lamination positions. And during lamination, a diaphragm on the discharging mechanism is fixed on the rotary lamination table. When the rotary stacking table rotates, the diaphragm can be driven to be wound on the rotary stacking table. And meanwhile, in the rotating process of the rotary stacking table, the grabbing mech