Electric power supply system between vehicle and house

• US 8,084,883 B2
• Filed: 12/15/2009
• Issued: 12/27/2011
• Est. Priority Date: 12/25/2008
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Komazawa, Eisuke, Fujino, Takeshi, Noguchi, Minoru, Shimada, Takamichi
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): CAVALLARI, DANIEL J
• Application Number:
  US12/638,202
• Publication Number:
  US 20100164287A1
• Time in Patent Office: 742 Days
• Field of Search: 307/9.1, 307/10.1, 320/109, 191/2, 701/33, 705/1, 903/903, 903/907, 903/908
• US Class Current: 307/9.1
• CPC Class Codes: B60L 2270/32 of electricity
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/30 Constructional details of charging stations
• CPC Class Codes: B60L 55/00 Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• CPC Class Codes: B60L 58/27 by heating
• CPC Class Codes: H02J 2300/30 The power source being a fuel cell
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y04S 10/126 the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]

Abstract

An electric bower supply system includes a power supply controlling element (62) configured to switch a plug-out power supply which supplies electric power (75) from a fuel cell (20) or a battery (21) to a house (70) and a plug-in power supply which supplies electric power from a commercial power source (75) disposed in the house (70) to a fuel cell vehicle (1a) on the basis of a vehicular power state of the fuel cell (20) and the battery (21) detected by a vehicular power state detecting element (61) and a household power state of the commercial power source (75) detected by a household power state detecting element (81) when a receptacle (10) of the fuel cell vehicle (1a) and an outlet (71) of the commercial power source (75) have been connected by a power cable (100).

Claims

1. An electric power supply system between a vehicle and a house comprising:

a power source connecting element configured to have a detachable connection between a vehicular power source disposed at the vehicle and a household power source disposed at the house for an electric power supply in both directions;

a vehicular power state detecting element configured to detect a vehicular power state;

a household power state detecting element configured to detect a household power state; and

a power supply controlling element configured to switch a first state in which electric power is supplied from the vehicular power source to the house and a second state in which electric power is supplied from the household power source to the vehicle, on the basis of the vehicular power state detected by the vehicular power state detecting element and the household power state detected by the household power state detecting element when the vehicular power source disposed at the vehicle and the household power source disposed at the house have been connected by the power source connecting element for the electric power supply in both directions, wherein

the vehicle is a vehicle which drives a driving wheel at least by a motor,

the vehicular power source is an electric accumulator, and

the power supply controlling element performs to supply a discharged power from the electric accumulator to the house so as the discharged power from the electric accumulator is consumed on the house side, when a first warm-up operation which increases a temperature of the electric accumulator according to the power discharging of the electric accumulator is detected to be on operation by the vehicular power state detecting element.

2. The electric power supply system between a vehicle and a house according to claim 1, wherein

the vehicle is a hybrid electric vehicle provided with a motor and an engine to drive a driving wheel;

and

the power supply controlling element performs to supply a discharged power from the electric accumulator or a generated power from the motor, which serves as the power generator by an actuation of the engine, to the house so as to consumed the discharged power or the generated power on house side, when it is detected by the vehicular power state detecting element that the electric accumulator operates the first warm-up operation or a second warm-up operation which increases the temperature of the electric accumulator according to the power charging by the generated power from the motor.

3. The electric power supply system between a vehicle and a house according to claim 1, wherein

the power supply controlling element performs to supply the electric power from the vehicular power source to the house to compensate the shortage of output power from the household power source when the voltage of the output power from the household power source is detected to be equal to or lower than a predefined level by the household power state detecting element.

4. The electric power supply system between a vehicle and a house according to claim 1, wherein

the vehicle is provided with a shift position detecting element configured to determine whether or not a shift lever is set at a position of parking, a motor configured to drive a driving wheel, and a switching element configured to switch on and off the electric power supply to the motor;

and

the electric power supply system further includes a power connection permitting element configured to permit the connection between the vehicular power source disposed in the vehicle and the household power source disposed in the house for the electric power supply in both directions by the power source connecting element, on condition that the shift lever is detected to be set at the position of parking by the shift position detecting element and the electric power supply to the motor is switched off by the switching element.

5. An electric power supply system between a vehicle and a house comprising:

a power source connecting element configured to have a detachable connection between a vehicular power source disposed at the vehicle and a household power source disposed at the house for an electric power supply in both directions;

a vehicular power state detecting element configured to detect a vehicular power state;

a household power state detecting element configured to detect a household power state; and

a power supply controlling element configured to switch a first state in which electric power is supplied from the vehicular power source to the house and a second state in which electric power is supplied from the household power source to the vehicle, on the basis of the vehicular power state detected by the vehicular power state detecting element and the household power state detected by the household power state detecting element, when the vehicular power source disposed at the vehicle and the household power source disposed at the house have been connected by the power source connecting element for the electric power supply in both directions, wherein

the vehicular power source is a fuel cell, and

the power supply controlling element performs to supply a generated power from the fuel cell to the house so as the generated power is consumed on the house side when a warm-up operation, which increases a temperature of the fuel cell according to the power generation of the fuel cell, is detected to be on operation by the vehicular power state detecting element.

6. The electric power supply system between a vehicle and a house according to claim 5, wherein

the power supply controlling element performs to supply the electric power from the vehicular power source to the house to compensate the shortage of output power from the household power source when the voltage of the output power from the household power source is detected to be equal to or lower than a predefined level by the household power state detecting element.

7. The electric power supply system between a vehicle and a house according to claim 5, wherein

the vehicle is provided with a shift position detecting element configured to determine whether or not a shift lever is set at a position of parking, a motor configured to drive a driving wheel, and a switching element configured to switch on and off the electric power supply to the motor;

and

the electric power supply system further includes a power connection permitting element configured to permit the connection between the vehicular power source disposed at the vehicle and the household power source disposed at the house for the electric power supply in both directions by the power source connecting element, on condition that the shift lever is detected to be set at the position of parking by the shift position detecting element and the electric power supply to the motor is switched off by the switching element.

8. An electric power supply system between a vehicle and a house comprising:

a power source connecting element configured to have a detachable connection between a vehicular power source disposed at the vehicle and a household power source disposed at the house for an electric power supply in both directions;

a vehicular power state detecting element disposed at the vehicle and configured to detect a vehicular power state;

a household power state detecting element disposed at the house and configured to detect a household power state; and

a power supply controlling element disposed at the vehicle and configured to switch a first state in which electric power is supplied from the vehicular power source to the house and a second state in which electric power is supplied from the household power source to the vehicle, on the basis of the vehicular power state including at least a temperature of the vehicular power source detected by the vehicular power state detecting element and the household power state detected by the household power state detecting element when the vehicular power source disposed at the vehicle and the household power source disposed at the house have been connected by the power source connecting element for the electric power supply in both directions.

9. The electric power supply system between a vehicle and a house according to claim 8, wherein

the power source connecting element is configured to have a detachable connection between the vehicle and the house for the electric power supply in both directions via a power cable;

the electric power supply system further includes a power line communication transmitting element disposed at the vehicle and the house configured to communicate between the vehicle and the house by superimposing data in electric power lines of the power cable; and

the power supply controlling element performs to supply electric power from the vehicular power source to the house and performs to supply electric power from the household power source to the vehicle by determining that the vehicle and the house are in a connected state by the power source connecting element so as to enable the electric power supply in both directions when it is able to communicate between the vehicle and the house by the power line communication transmitting element.

10. The electric power supply system between a vehicle and a house according to claim 8, wherein

the vehicular power source is a fuel cell;

and

the power supply controlling element performs a warm-up operation to increase a temperature of the fuel cell according to a power generation of the fuel cell when the temperature of the fuel cell detected by the vehicular power state detecting element is less than a predefined temperature of a lower limit, and performs to supply the generated power from the fuel cell to the house to consume the generated power on the house side.

11. The electric power supply system between a vehicle and a house according to claim 8, wherein

the vehicle is an electric vehicle provided with a motor to drive a driving wheel;

the vehicular power source is an electric accumulator; and

the power supply controlling element performs a warm-up operation which increases a temperature of the electric accumulator according to a power discharging of the electric accumulator, when a state of charge of the electric accumulator detected by the vehicular power state detecting element is equal to or more than a predefined level and the temperature of the electric accumulator detected by the vehicular power state detecting element is less than a predefined temperature of a lower limit, and performs to supply a discharged power from the electric accumulator to the house to consume the discharged power on the house side.

12. The electric power supply system between a vehicle and a house according to claim 8, wherein

the vehicle is a hybrid electric vehicle provided with a motor and an engine to drive a driving wheel;

the vehicular power source is an electric accumulator; and

the power supply controlling element performs a first warm-up operation which increases a temperature of the electric accumulator according to a power discharging of the electric accumulator when a state of charge of the electric accumulator detected by the vehicular power state detecting element is equal to or more than a predefined level and the temperature of the electric accumulator detected by the vehicular power state detecting element is less than a predefined temperature of a lower limit, or performs a second warm-up operation which increases the temperature of the electric accumulator according to a power charging of the electric accumulator by a generated power from the motor by operating the motor as a power generator by the actuation of the engine, when it is not able to increase the temperature of the electric accumulator according to a power discharging by the first warm-up operation due to the state of charge of the electric accumulator detected by the vehicular power state detecting element being lower than the predefined level, and when the first warm-up operation or the second warm-up operation is being performed, the power supply controlling element performs to supply the discharged power from the electric accumulator or the generated power from the motor to the house to consume the discharged power or the generated power at the house side.

13. The electric power supply system between a vehicle and a house according to claim 8, wherein

the power supply controlling element performs to supply the electric power from the vehicular power source to the house to compensate the shortage of output power from the household power source when the voltage of the output power from the household power source is detected to be equal to or lower than a predefined level by the household power state detecting element.

14. The electric power supply system between a vehicle and a house according to claim 8, wherein

the vehicle is provided with a shift position detecting element configured to determine whether or not a shift lever is set at a position of parking, a motor configured to drive a driving wheel, and a switching element configured to switch on and off the electric power supply to the motor;

and

the electric power supply system further includes a power connection permitting element configured to permit the connection between the vehicle and the house for the electric power supply in both directions by the power source connecting element, on condition that the shift lever is detected to be set at the position of parking by the shift position detecting element and the electric power supply to the motor is switched off by the switching element.