Demagnetizing device and battery production system

The utility model provides a demagnetizing device and a battery production system, and relates to the technical field of battery production and processing equipment. The demagnetizing device comprises a shell, a magnetic attraction piece and a heating assembly, the shell is provided with a containing cavity, the shell is provided with a first end and a second end which are oppositely arranged, the first end is provided with a first circulation opening, and the second end is provided with a second circulation opening; the magnetic attraction piece is located in the containing cavity and extends in the first direction, the magnetic attraction piece is connected to the shell, a flow channel surrounding the magnetic attraction piece is defined by the magnetic attraction piece and the shell, and the flow channel is communicated with the first circulation opening and the second circulation opening; the heating assembly is located in the flow channel and connected to the shell. Coating slurry passes through the flow channel and then surrounds the magnetic attraction part to form circulation layer slurry, the magnetic attraction part can adsorb magnetic impurities in the slurry, the slurry is heated through the heating assembly, the fluidity of the slurry can be improved, the magnetic attraction part can more conveniently adsorb the magnetic impurities in the slurry, and the coating quality is improved. Therefore, the removal efficiency and effect of the magnetic impurities of the coating slurry can be effectively improved.