Method and device for measuring tilting amount of lithium ion battery diaphragm

The invention discloses a method and device for measuring the tilting amount of a lithium ion battery diaphragm, and the method comprises the steps: enabling a laser displacement sensor to horizontally move above a reference plate, and enabling the moving direction of the laser displacement sensor to be perpendicular to the length direction of the reference plate; the laser emitting end of the laser displacement sensor is vertically downward, and the distance between the reference plate and the laser displacement sensor is measured while the laser displacement sensor moves; then the diaphragm sample is placed on the reference plate, the laser displacement sensor moves above the diaphragm sample, and the distance between the diaphragm and the laser displacement sensor is measured while the laser displacement sensor moves; and finally, the difference value of the two intervals recorded by the laser displacement sensor at the same position is calculated, so that the difference value of the diaphragm in the MD di