Detection method for chlorine ion content in lithium-ion battery electrolyte

The invention discloses a detection method for chlorine ion content in lithium-ion battery electrolyte. A non-aqueous potentiometric titration method is adopted for detection. Non-aqueous silver nitrate standard solution is taken as titrant; a silver electrode is an indicating electrode and a glass electrode is a reference electrode; a detected sample is titrated to an end point by the non-aqueous silver nitrate standard solution; and the chlorine ion content in the sample can be obtained by calculation according to the size of the detected sample, the concentration of the silver nitrate standard solution and the titration volume. The method has the advantages of simplicity and rapidness in operation, low cost, low detection limit and high result precision.