POWER SYSTEM OF ELECTRIC VEHICLE, ELECTRIC VEHICLE COMPRISING THE SAME AND METHOD FOR HEATING BATTERY GROUP OF ELECTRIC VEHICLE

摘要

A power system of an electric vehicle, an electric vehicle comprising the same and a method for heating a battery group of the electric vehicle are provided. The power system comprises: a battery group; a battery heater connected with the battery group; a battery management device connected with the battery group and the battery heater respectively, configured to control the battery heater to heat the battery group intermittently when a temperature of the battery group is lower than a first heating threshold and a residual electric quantity of the battery group is larger than a parking electric quantity threshold and to control the battery heater to stop heating the battery group according to a current throttle depth change rate when the battery group is in a running heating mode; an electric distribution box; a motor controller connected with a motor and the electric distribution box respectively; and an isolation inductor.