Power feeding device, vehicle equipped with the same, and power feeding method

• US 8,928,280 B2
• Filed: 10/26/2010
• Issued: 01/06/2015
• Est. Priority Date: 10/26/2010
• Status: Expired due to Fees

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Sugiyama, Yoshinobu, Ang, Wanleng
• Primary Examiner(s): Fantu, Yalkew
• Application Number:
  US13/876,245
• Publication Number:
  US 20130207607A1
• Time in Patent Office: 1,533 Days
• Field of Search: 320/109
• US Class Current: 320/109
• CPC Class Codes: B60L 1/006 to power outlets
• CPC Class Codes: B60L 15/007 Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles
• CPC Class Codes: B60L 15/2009 for braking
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2220/14 Synchronous machines
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 50/40 using propulsion power supplied by capacitors
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/63 in response to network capacity
• CPC Class Codes: B60L 53/64 Optimising energy costs, e.g. responding to electricity rates
• CPC Class Codes: B60L 53/665 Methods related to measuring, billing or payment
• 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 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60L 7/14 for vehicles propelled by ac motors
• CPC Class Codes: H02J 3/38 Arrangements for parallely feeding a single network by two or more generators, converters or transformers
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• 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 10/72 : Electric energy management in electromobility
• 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: Y02T 90/167 : Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• 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]
• CPC Class Codes: Y04S 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

A switching relay is configured to switch between a first power feeding path for feeding power from a charge inlet to an outlet and a second power feeding path for feeding power from a power storage device to the outlet. A PM-ECU controls the switching relay to switch between the first power feeding path and the second power feeding path, based on a result of comparison between a power cost in a case where the power is fed to the outlet through the first power feeding path and a power cost in a case where the power is fed to the outlet through the second power feeding path.

Claims

1. A power feeding device for feeding power to an outlet provided in a vehicle, comprising:

a power receiving unit receiving supply power supplied from an external power source external to the vehicle;

a rechargeable power storage device ;

a charger provided between said power receiving unit and said power storage device, and configured to convert said supply power into charging power for said power storage device and charge said power storage device;

a switching circuit configured to switch between a first power feeding path for feeding power from said power receiving unit to said outlet and a second power feeding path for feeding power from said power storage device to said outlet; and

a control device controlling said switching circuit to switch between said first power feeding path and said second power feeding path, based on a result of comparison between a first evaluation value indicating a value of a predetermined index in a case where the power is fed to said outlet through said first power feeding path and a second evaluation value indicating a value of said index in a case where the power is fed to said outlet through said second power feeding path, wherein said index is a power cost or a carbon dioxide emission factor.

2. The power feeding device according to claim 1, wherein said index is the power cost.

3. The power feeding device according to claim 2, wherein said control device controls said switching circuit to select one of said first and second power feeding paths that has a lower power cost.

4. The power feeding device according to claim 1, wherein said index is the carbon dioxide emission factor.

5. The power feeding device according to claim 4, wherein said control device controls said switching circuit to select one of said first and second power feeding paths that has a lower carbon dioxide emission factor.

6. The power feeding device according to claim 1, wherein, if said power storage device has a state of charge lower than a predetermined threshold value, said control device controls said switching circuit to select said first power feeding path.

7. The power feeding device according to claim 1, wherein

said switching circuit is provided between said power receiving unit and said charger,

said outlet is connected to said switching circuit,

said charger is configured to be capable of converting power bi-directionally, and

said second power feeding path includes said charger.

8. The power feeding device according to claim 7, wherein said control device calculates said second evaluation value, considering a power conversion efficiency of said charger.

9. The power feeding device according to claim 1, further comprising a display unit for displaying to a user which of said first power feeding path and said second power feeding path is selected.

10. A vehicle, comprising:

the power feeding device according to claim 1; and

an outlet recieving power from said power feeding device.

11. A power feeding method for feeding power to an outlet provided in a vehicle, said vehicle including

a power receiving unit receiving supply power supplied from an external power source external to the vehicle,

a rechargeable power storage device, a charger provided between said power receiving unit and said power storage device, and configured to convert said supply power into charging power for said power storage device and charge said power storage device, and

a switching circuit configured to switch between a first power feeding path for feeding power from said power receiving unit to said outlet and a second

power feeding path for feeding power from said power storage device to Said outlet, said power feeding method comprising the steps of:

calculating a first evaluation value indicating a value of a predetermined index in a case where the power is fed to said outlet through said first power feeding path;

calculating a second evaluation value indicating a value of said index in a case where the power is fed to said outlet through said second power feeding path; and

switching between said first power feeding path and said second power feeding path by controlling said switching circuit based on a result of comparison between said first evaluation value and said second evaluation value, wherein said index is a power cost or a carbon dioxide emission factor.

12. The power feeding method according to claim 11, wherein said index is the power cost.

13. The power feeding method according to claim 11, wherein said index is the carbon dioxide emission factor.

14. The power feeding method according to claim 11, wherein

said switching circuit is provided between said power receiving unit and said charger,

said outlet is connected to said switching circuit,

said charger is configured to be capable of converting power bi-directionally,

said second power feeding path includes said charger, and

the step of calculating said second evaluation value includes the step of calculating said second evaluation value, considering a power conversion efficiency of said charger.

15. The power feeding method according to claim 11, further comprising the step of displaying to a user which of said first power feeding path and said second power feeding path is selected.