초록 ▼

To obtain an electric vehicle power supply 10 having a high output power density and regenerative power density, and which is compact and lightweight wherein a first battery 12 whose regenerative power density increases with decrease of the SOC and a second battery 14 whose output power density incr

To obtain an electric vehicle power supply 10 having a high output power density and regenerative power density, and which is compact and lightweight wherein a first battery 12 whose regenerative power density increases with decrease of the SOC and a second battery 14 whose output power density increases with increase of the SOC are used as an electrical storage device, and control is performed so that the SOC of the first battery 12 is maintained low while the SOC of the second battery 14 is maintained high. The regenerative power density of the first battery 12 is therefore high, the regeneration current from the motor 32 is mainly stored by the first battery 12, and the force used to drive the motor 32 is mainly output by the second battery 14 which has a high output power density.

대표청구항 ▼

[ What is claimed:] [1.] An electric vehicle power supply wherein a motor is driven by power stored in an electrical storage device, and said electrical storage device is charged by regenerative power from said motor, said power supply comprising:a first battery contained in said storage device, of

[ What is claimed:] [1.] An electric vehicle power supply wherein a motor is driven by power stored in an electrical storage device, and said electrical storage device is charged by regenerative power from said motor, said power supply comprising:a first battery contained in said storage device, of which the regenerative power density of said first battery increasing as the SOC (State of Charge) decreases,a second battery contained insaid storage device, the output power density of said second battery increasing as the SOC increases,and SOC control means which maintains the SOC of said first battery equal to or lower than a first predetermined value and maintains the SOC of said second battery equal to or higher than a second predetermined value.