Electric power supply system

An electric power supply system for an electric vehicle comprising:

• an electric power generator for generating an electric power;
• an electricity storage device for being charged with the electric power from the electric power generator, and supplying the electric power to an electrical load;
• an electric power distributing device for distributing the electric power to the electrical load from the electric power generator and the electricity storage device at a sharing ratio therebetween;
• and
• a control unit for determining the sharing ratio of the electric power and controlling the electric power distributing device, wherein
• the electric power supply system is capable of supplying the electric power to the electrical load in a low output range, a middle output range, and a high output range, and wherein:
• the middle output range is a range extending from a lower limit to an upper limit;
• the low output range is a range below the lower limit;
• the high output range is a range above the upper limit;
• in the middle output range, the control unit determines the sharing ratio of the electric power between the electric power supply generator and the electricity storage device so as to increase and decrease the electric power distributed to the electrical load;
• and
• in the low output range and in the high output range, the control unit determines the sharing ratio of the electric power between the electric power supply generator and the electricity storage device so as to increase the share of the electric power supplied by the electricity storage device.