Energy management system of battery electric vehicle

The utility model discloses an energy management system of a battery electric vehicle. The energy management system comprises an Electronically Controlled Unit (ECU), a traction battery management system, a traction battery pack, a traction motor controller and a traction motor; the ECU is connected to the traction battery pack by the traction battery management system; the ECU is connected to the traction motor by the traction motor controller. The energy management system further comprises a vehicle-mounted charger; the ECU is connected with the vehicle-mounted charger; the vehicle-mounted charger is connected with the traction battery pack. According to the utility model, under a precondition that demands on basic technical characteristics (such as, dynamic property, driving stability, and the like) of the vehicle are met, the energy management system aims to realize flow of energy along the best route among the energy converting devices and to realize the highest energy utilization efficiency of the overall vehicle based on the characteristics of all parts and operation condition of the vehicle.