Electric power supply and energy harvesting auxiliary system for electric vehicle and method of operating the power supply and energy harvesting auxiliary system

摘要

An auxiliary power supply system for an electric motor (32) of an electric vehicle (100), a supercapacitor (2) that generates a first auxiliary power supply, and a battery (4) that generates a second auxiliary power supply ), A common bi-directional converter and control logic, (i) powering the electric motor via the network power supply voltage and through energy stored in the supercapacitor during acceleration of the electric vehicle, (Ii) harvesting kinetic energy during braking of the electric vehicle to charge the supercapacitor; (iii) supplying power to the electric motor only through battery energy when there is no network power supply voltage; And) control logic for charging the battery while the electric vehicle is traveling at a constant speed and parked. [Selection] Figure 2