Power transmitting apparatus, power receiving apparatus, control methods therefor, programs, and storage medium

• US 9,887,554 B2
• Filed: 05/29/2014
• Issued: 02/06/2018
• Est. Priority Date: 06/25/2013
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Takahashi, Naoto
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): Pham, Duc M
• Application Number:
  US14/787,432
• Publication Number:
  US 20160087450A1
• Time in Patent Office: 1,349 Days
• Field of Search: 307104
• CPC Class Codes: B60L 2240/80 Time limits
• 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 53/60 Monitoring or controlling charging stations
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• 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: 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 30/14 Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

A power transmitting apparatus that transmits electric power to a power receiving apparatus performs wireless communication with the power receiving apparatus, transmits at least one type of electric power having a power value specific to the power transmitting apparatus, and performs a determination as to whether or not to transmit electric power required by the power receiving apparatus to the power receiving apparatus. The power transmitting apparatus receives at least one type of converted value converted from the electric power received by the power receiving apparatus, and performs the determination based on the converted value and the specific power value.

Claims

1. A power transmitting apparatus that transmits electric power to a power receiving apparatus, the power transmitting apparatus comprising:

a first power transmitting unit configured to transmit, to the power receiving apparatus, first type of electric power having a first power value and second type of electric power having a second power value different from the first power value;

a second power transmitting unit configured to transmit electric power having a third power value which is larger than the first power value and the second power value;

a communication unit configured to perform wireless communication wherein a communication range of the communication unit is wider than electric power transmittable range of the first power transmitting unit and the second power transmitting unit; and

a determination unit configured to determine whether the power receiving apparatus is the destination of power transmission by the second power transmitting unit based on power transmissions with the first type of electric power and the second type of electric power by the first power transmitting unit and communication by the communication unit.

2. The power transmitting apparatus according to claim 1,

wherein if the received power result corresponds to the first power value and the second power value, the determination unit determines that the power receiving apparatus is the destination of power transmission by the second power transmitting unit.

3. The power transmitting apparatus according to claim 2,

wherein if a first value indicated by the received power result and the first power value satisfy a constant ratio relationship, and a second value indicated by the received power result and the second power value satisfy a constant ratio relationship, the determination unit determines that the power receiving apparatus is the destination of power transmission by the second power transmitting unit.

4. The power transmitting apparatus according to claim 2, further comprising:

a correspondence table showing a correspondence between a position of the power receiving apparatus and a transmission efficiency during power supply from the power transmitting apparatus to the power receiving apparatus,

wherein if a converted first value obtained by multiplying a first value indicated by the received power result by a transmission efficiency selected from the correspondence table and the first power value match, and a converted second value obtained by multiplying a second value indicated by the received power result by a transmission efficiency selected from the correspondence table and the second power value match,

the determination unit determines that the power receiving apparatus is the destination of transmission power by the second power transmitting unit.

5. The power transmitting apparatus according to claim 2,

wherein the communication unit receives the same received power result multiple times.

6. The power transmitting apparatus according to claim 2,

wherein the received power result indicates a current value or a voltage value.

7. The power transmitting apparatus according to claim 1,

wherein the first power transmitting unit transmits the first type of electric power for a first predetermined time and the second type of electric power for a second predetermined time,

the communication unit receives a first power receiving time of the first type of electric power received by the power receiving apparatus and a second power receiving time of the second type of electric power received by the power receiving apparatus, and

the determination unit performs the determination based on the first and second power receiving time and the first and second predetermined time.

8. The power transmitting apparatus according to claim 1,

wherein if the communication unit receives a signal indicating that power supply is possible, the first power transmitting unit transmits the first and second type of electric power.

9. The power transmitting apparatus according to claim 1,

wherein the communication unit receives a received power results when the first power transmitting unit transmits the first type of electric power and when the first power transmitting unit transmits the second type of electric power.

10. The power transmitting apparatus according to claim 1,

wherein the second power transmitting unit transmits the electric power required by the power receiving apparatus to the power receiving apparatus in a case where the determination unit determines that the power receiving apparatus is the destination of power transmission by the second power transmitting unit.

11. A power receiving apparatus that receives electric power from a power transmitting apparatus, the power receiving apparatus comprising:

a power receiving unit configured to receive, from the power transmitting apparatus, first type of electric power having a first power value and second type of electric power having a second power value; and

a communication unit configured to perform wireless communication with the power transmitting apparatus to determine whether to receive or not electric power having a third power value which is larger than the first and second power value, wherein a communication range of the communication unit is wider than electric power transmittable range of the power transmission apparatus,

wherein the power receiving unit receives the electric power having the third power value from the power transmission apparatus based on a received power result of the first type of electric power and the second type of electric power by the power receiving unit, and communication by the communication unit.

12. The power receiving apparatus according to claim 11,

wherein if the communication unit transmits a signal indicating that power supply is possible, the power receiving unit receives the first and second type of electric power.

13. The power receiving apparatus according to claim 11, the communication unit transmits received power results of the power receiving apparatus to the power transmitting apparatus.

14. A method for controlling a power transmitting apparatus that transmits electric power to a power receiving apparatus, the method comprising:

transmitting, to the power receiving apparatus, first type of electric power having a first power value and second type of electric power having a second power value different from the first power value;

transmitting electric power having a third power value which is larger than the first power value and the second power value;

performing wireless communication wherein a communication range in performing the wireless communication is wider than electric power transmittable range in transmitting the first type of electric power and the second type of electric power; and

determining whether the power receiving apparatus is the destination of transmission of power having the third power value based on power transmissions with the first type of electric power and the second type of electric power and the wireless communication.

15. A method for controlling a power receiving apparatus that receives electric power from a power transmitting apparatus, the method comprising:

receiving, from the power transmitting apparatus, first type of electric power having a first power value and second type of electric power having a second power value;

performing wireless communication with the power transmitting apparatus to determine whether to receive or not electric power having a third power value which is larger than the first and second power value, wherein a communication range in performing the wireless communication is wider than electric power transmittable range of the power transmission apparatus; and

receiving the electric power having the third power value from the power transmission apparatus based on a received power result of the first type of electric power and the second type of electric power, and wireless communication.

16. A non-transitory computer-readable storage medium storing a computer program for causing a computer to execute a method for controlling a power transmitting apparatus that transmits electric power to a power receiving apparatus, the method comprising:

transmitting, to the power receiving apparatus, first type of electric power having a first power value and second type of electric power having a second power value different from the first power value;

transmitting electric power having a third power value which is larger than the first power value and the second power value;

performing wireless communication wherein a communication range in performing the wireless communication is wider than electric power transmittable range in transmitting the first type of electric power and the second type of electric power; and

determining whether the power receiving apparatus is the destination of transmission of power having the third power value based on power transmissions with the first type of electric power and the second type of electric power and the wireless communication.

17. A non-transitory computer-readable storage medium storing a computer program for causing a computer to execute a method for controlling a power receiving apparatus that receives electric power from a power transmitting apparatus, the method comprising:

receiving, from the power transmitting apparatus, first type of electric power having a first power value and second type of electric power having a second power value;

performing wireless communication with the power transmitting apparatus to determine whether to receive or not electric power having a third power value which is larger than the first and second power value, wherein a communication range in performing the wireless communication is wider than electric power transmittable range of the power transmission apparatus; and

receiving the electric power having the third power value from the power transmission apparatus based on a received power result of the first type of electric power and the second type of electric power, and wireless communication.