Method for detecting oil content of lithium battery diaphragm by using DSC

The invention provides a method for detecting oil content of a lithium battery diaphragm by using DSC. The method comprises the following steps: taking 5-10mg of an oil-containing diaphragm sample ona lithium battery diaphragm body, taking 5-10mg of an oil-free diaphragm sample on an oil-free diaphragm, carrying out enthalpy test on the oil-free diaphragm sample by using a differential calorimetry scanner at room temperature to obtain a first enthalpy value, carrying out enthalpy test on the oil-containing diaphragm sample by using the differential calorimetry scanner to obtain a second enthalpy value, subtracting the second enthalpy value from the first enthalpy value to obtain a difference value, and dividing the difference value by the first enthalpy value to obtain the oil content ofthe oil-containing diaphragm sample. Compared with the prior art, the method has the advantages that the test efficiency of the oil content of the lithium battery diaphragm is improved, and the methodis more environment-friend