Method for testing thickness of dry film of PTC (Positive Temperature Coefficient) conductive paste

The invention relates to the technical field of battery manufacturing, in particular to a PTC (Positive Temperature Coefficient) conductive paste dry film thickness testing method, which comprises the following steps of S1, printing PTC conductive paste on a PI (Polyimide) film by using a printing machine to form a process sample piece for film thickness testing; s2, testing the wet film of the process sample piece to obtain the thickness of the wet film after printing of the conductive paste; s3, drying the process sample piece, and testing the dried film layer to obtain the dry film thickness after printing of the conductive paste; and S4, measuring a large amount of thickness data of the wet film and the dry film by using a laser non-contact shape measuring instrument, and obtaining a value, namely the drying rate, by analyzing the corresponding thickness of the wet film and the dry film. The thickness of the dry film is calculated by testing the thickness of the wet film through the method for testing the