Electric pump for power supply thermal management system of electric vehicle

An electric pump for an electric automobile power supply heat management system comprises a motor, an impeller in axial transmission of the motor, a volute chamber driving pump liquid, an annular cylindrical cavity surrounding a shell of the motor, and a cylindrical heater arranged in the cavity and used for heating the pump liquid and dividing the cavity into an outer peripheral cavity and an inner peripheral cavity. The inner water jacket is arranged in the inner peripheral cavity and divides the inner peripheral cavity into a middle-layer inner peripheral cavity I and an inner-layer inner peripheral cavity II, at one end of the cavity, the downstream of the flow channel of the inner peripheral cavity I and the downstream of the flow channel of the inner peripheral cavity II are gathered and then lead to the upstream of the flow channel of the outer peripheral cavity, and at the other end of the cavity, the upstream of the flow channel of the inner peripheral cavity I and the upstream of the flow channel of