Battery pole piece coating state monitoring device

The utility model discloses a battery pole piece coating state monitoring device, which comprises an upper alignment piece arranged above a coating pole piece and a lower alignment piece arranged below the coating pole piece, the upper alignment piece and the lower alignment piece are oppositely arranged at an interval along the vertical direction, and one ends, close to the coating pole piece, of the upper alignment piece and the lower alignment piece are positioned in the same axis or the same vertical plane; and the first image device can obtain and display an alignment state image of the lower alignment piece and the edge of the back coating of the coated pole piece. According to the device, the upper alignment piece and the lower alignment piece are adopted to detect the coating edge positions of the front face/the back face of the pole piece respectively, the alignment state between the upper alignment piece and the coating edge and the alignment state between the lower alignment piece and the coating e