Dry rotation detection method and device for electric water pump

The invention relates to the technical field of heat management, and provides a dry running detection method and device for an electric water pump. The method comprises the steps that it is determined that the obtained current rotating speed of the electric water pump is larger than or equal to the preset rotating speed, the electric water pump is controlled to keep the current rotating speed in all time periods within the first preset duration in sequence, and first water pump currents of the electric water pump in all time periods within the first preset duration are detected in sequence; determining that each first water pump current is smaller than or equal to a first preset current, and controlling the electric water pump to enter a shutdown restart state; wherein the first preset current is determined according to the current rotating speed. According to the dry rotation detection method of the electric water pump provided by the embodiment of the invention, missing detection of dry rotation faults can