Power supply device and power supply method

• US 9,254,756 B2
• Filed: 10/18/2011
• Issued: 02/09/2016
• Est. Priority Date: 10/18/2011
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Miwa, Koji, Kawai, Takashi, Ichikawa, Shinji
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): TORRES RUIZ, JOHALI ALEJANDRA
• Application Number:
  US14/351,960
• Publication Number:
  US 20140300316A1
• Time in Patent Office: 1,575 Days
• Field of Search: 320/108
• US Class Current: 1/1
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: B60L 53/665 Methods related to measuring, billing or payment
• CPC Class Codes: G06Q 30/04 Billing or invoicing
• CPC Class Codes: G06Q 50/06 Energy or water supply
• CPC Class Codes: Y02E 40/70 Smart grids as climate change mitigation technology in the energy generation sector
• 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: Y04S 10/50 Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
• CPC Class Codes: Y04S 50/12 Billing, invoicing, buying or selling transactions or other related activities, e.g. cost or usage evaluation

Abstract

A power supply device which performs power supply from an outside to a vehicle includes: a power source section for performing the power supply to the vehicle; and a control device that performs control of the power source section. The control device obtains information about power reception efficiency of the vehicle as an object of the power supply and determines a power reception efficiency range and a fee that correspond to the obtained information from a plurality of power reception efficiency ranges and plurality of fees that are set corresponding to the plurality of power reception efficiency ranges. The power supply device preferably further includes a power transmission section for receiving the power from the power source section and contactlessly performing power transmission to the vehicle.

Claims

1. A power supply device which performs power supply from an outside to a vehicle, the power supply device comprising:

a power source configured to perform the power supply to the vehicle; and

a control device that performs control of the power source,

wherein the control device receives a charging request from the vehicle after the vehicle is parked at a prescribed position, the control device transmits power to the vehicle, and

the control device obtains, from the vehicle, information about power reception efficiency of charging started in response to the charging request from the vehicle as an object of the power supply, and the control device determines a power reception efficiency range and a fee that correspond to the obtained information from a plurality of power reception efficiency ranges and a plurality of fees that are set corresponding to the plurality of power reception efficiency ranges.

2. The power supply device according to claim 1, further comprising a power transmitter configured to receive the power from the power source and contactlessly performing power transmission to the vehicle.

3. The power supply device according to claim 2, wherein the power transmitter is configured such that a difference in a natural frequency from a power receiver of the vehicle falls within ±

10%.

4. The power supply device according to claim 2, wherein a coupling coefficient between a power receiver of the vehicle and the power transmitter is 0.1 or smaller.

5. The power supply device according to claim 2, wherein the power transmitter transmits the power to the power receiver through either one of a magnetic field that is formed between the power receiver of the vehicle and the power transmitter and vibrates at a specified frequency and an electric field that is formed between the power receiver and the power transmitter and vibrates at a specified frequency.

6. The power supply device according to claim 1, wherein the control device obtains, as the information, any of power reception efficiency in execution of temporary energization, a mismatch amount between a power and a power receiver in a case where contactless charging is performed, presence or absence of an object interposed between the power transmitter and the power receiver in a case where the contactless charging is performed, and aging degradation information about the vehicle and calculates power reception efficiency in power supply according to the obtained information.

7. The power supply device according to claim 1, wherein the control device informs an operator of the vehicle of the determined fee.

8. The power supply device according to claim 1, wherein the control device informs an operator of the vehicle of the determined fee, starts the power supply to the vehicle if the operator of the vehicle approves the determined fee, and stops the power supply to the vehicle if the operator of the vehicle does not approve the determined fee.

9. A power supply method of performing power supply to a vehicle from a power supply device that performs power supply from an outside to the vehicle, the power supply method comprising:

transmitting a charging request from the vehicle to the power supply device when a user performs a prescribed operation after the vehicle is parked;

transmitting power from the power supply device to the vehicle when the power supply device receives the charging request;

transmitting information about power reception efficiency of the transmitted power from the vehicle to the power supply device;

obtaining information about power reception efficiency of the vehicle as an object of the power supply; and

determining a power reception efficiency range and a fee that correspond to the obtained information from a plurality of power reception ranges and a plurality of fees that are set corresponding to the plurality of power reception efficiency ranges.