The invention provides a test method and device for a motor active short-circuit
relay, and a storage medium. The method includes the steps: performing the zero speed detection of a motor after a
motor controller completes a low-
voltage power-on operation, wherein when the
motor controller is powered down, a first
relay and a second
relay are both switched on; controlling the second relay to be turned on if the motor passes the zero speed detection, and injecting a first
excitation signal at the control ends of a first phase winding and a
third phase winding through the
motor controller; performing injection detection of the first
excitation signal to determine whether the first
excitation signal is successfully injected or not; controlling the first relay to be turned on if the first excitation
signal is successfully injected, and obtaining a
voltage across two ends of the first relay; and judging whether the power-on test of the first relay is successful or not according to the
voltage across two ends of the first relay. The method can realize the turn-on test of the short-circuit relay, and ensures the reliability of the active short-circuit function of the vehicle motor duringdriving.