Sampling template and detection assembly for detecting thermal shrinkage rate of lithium battery diaphragm

The utility model firstly provides a lithium battery diaphragm thermal shrinkage rate detection sampling template which comprises a sampling template body, at least one marking hole is formed in the inner side of each side edge of the sampling template body, the marking holes penetrate through the sampling template body, and the axes of the marking holes are vertically arranged. The utility model also provides a lithium battery diaphragm thermal shrinkage rate detection assembly which comprises a marking rod and the sampling template body, the end part of the marking rod is provided with a marking head which is used for penetrating through the marking hole and marking a mark on the lithium battery diaphragm, and the marking head is coaxial with the marking rod. According to the lithium battery diaphragm thermal shrinkage rate detection sampling template and the detection assembly, shrinkage size data of each side edge of a plurality of groups of lithium battery diaphragms after thermal shrinkage can be measur