Contactor control method

The invention belongs to the technical field of automobile control, and provides a contactor control method. Before contactors are powered by high-voltage electricity, the method includes the steps that the positive electrode contract is controlled to be turned on; the first end voltage between a whole vehicle high-voltage output positive electrode and a whole vehicle high-voltage output negative electrode is detected; whether the first end voltage is larger than zero or not is judged; the positive electrode contactor is controlled to be turned off and the negative electrode contactor is controlled to be turned on if the first end voltage is not larger than zero; the second end voltage between the whole vehicle high-voltage output positive electrode and the whole vehicle high-voltage output negative electrode is detected; whether the second end voltage is larger than zero or not is judged; and if the second end voltage is not larger than zero, the signal showing that adhesion happens to none of the negative electrode contactor, the positive electrode contactor and the precharging contractor is sent out. The invention aims at providing the contractor control method. By turning on and off the positive electrode contactor and the negative electrode contactor step by step, whether the end voltages between the whole vehicle high-voltage output positive electrode and the whole vehicle high-voltage output negative electrode are larger than zero or not are detected, and therefore whether adhesion happens to the contactors or not is judged, and reliability of a whole vehicle high-voltage system is improved.