Lithium battery diaphragm appearance offline detection auxiliary device

The utility model provides a lithium battery diaphragm appearance offline detection auxiliary device, which comprises a medical lamp box, a light source for illuminating a diaphragm is arranged in themedical lamp box; the unwinding device is positioned on one side of the medical lamp box and is used for releasing or stopping releasing the pre-wound diaphragm under the control of a clutch; the winding device is located on the side, opposite to the unwinding device, of the medical lamp box and used for winding the diaphragm released by the unwinding device, and power is provided through a variable frequency motor; the two guide rollers are located between the medical lamp box and the unwinding device and between the medical lamp box and the winding device respectively and located at the same height, the height is larger than the top face of the medical lamp box, and the two guide rollers are used for supporting a membrane passing through the upper portion and enabling the membrane to pass through the upper port