Power transmission device, power transmission method, and power transmission system

• US 9,054,746 B2
• Filed: 02/17/2012
• Issued: 06/09/2015
• Est. Priority Date: 02/21/2011
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Miyabayashi, Naoki, Ishikawa, Yasuharu
• Primary Examiner(s): Mehmood, Jennifer
• Assistant Examiner(s): Jiang, Yong Hang
• Application Number:
  US13/399,740
• Publication Number:
  US 20120212072A1
• Time in Patent Office: 1,208 Days
• Field of Search: 340/4.2, 340/10.1, 340/10.34, 340/13.23, 340/13.24, 340/13.25, 320/108, 307/104
• US Class Current: 1/1
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/05 using capacitive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: H04W 52/283 Power depending on the position of the mobile

Abstract

A power transmission device includes a communication unit that transmits a power capability information transmission request, receives power capability information in response to the power capability information transmission request, and transmits randomized parameter information by a communication channel. The power transmission device also includes a processing unit that produces the randomized parameter information, based on the power capability information. Further, the power transmission device includes a power transmission unit that wirelessly transmits power based on the randomized parameter information.

Claims

1. A power transmission device, comprising:

circuitry configured to

transmit a power capability information transmission request;

receive power capability information in response to the power capability information transmission request, and transmit randomized parameter information by a communication channel;

produce the randomized parameter information, based on the power capability information; and

wirelessly transmits power based on the randomized parameter information,

wherein the circuitry receives first power reception amount information for one of a plurality of parameters after transmitting the power, and is configured to calculate a second power transmission efficiency based on the first power reception amount information and to generate parameter information excluding the one of the parameters from the parameter information if the second power transmission efficiency is less than a predetermined value.

2. The power transmission device according to claim 1, wherein the power capability information indicates a transmission type and a parameter type.

3. The power transmission device according to claim 2, wherein the transmission type is defined by at least one of an electromagnetic induction, electric waves, a magnetic-field resonance, and an electric-field resonance, the parameter type is defined by at least one of a frequency, a voltage, and an azimuth angle, and the circuitry wirelessly transmits the power using the at least one of the electromagnetic induction, the electric waves, the magnetic-field resonance, and the electric-field resonance and the at least one of the frequency, the voltage, and the azimuth angle.

4. The power transmission device according to claim 2, wherein the circuitry is further configured to

store transmission power capability information, set a parameter by comparing the parameter type indicated by the received power capability information and a parameter type indicated by the transmission power capability information to add the parameter type indicated by the received power capability information to a parameter type list.

5. The power transmission device according to claim 2, wherein the circuitry is configured to calculate a plurality of power transmission efficiencies for each of a plurality of parameters of the parameter type and to set a standard efficiency range based on a maximum power transmission efficiency of the plurality of power transmission efficiencies.

6. The power transmission device according to claim 1, wherein the communication channel is encrypted.

7. The power transmission device according to claim 1, wherein the circuitry receives first power reception amount information for the one of the parameters after transmitting the power, and is configured to calculate a first power transmission efficiency based on the first power reception amount information and causes the circuitry not to transmit the power if the first power transmission efficiency is less than a predetermined value.

8. The power transmission device according to claim 1, wherein the one of the parameters is a first one, if the circuitry receives additional first power reception amount information for a second one of the parameters, the circuitry calculates an additional second power transmission efficiency based on the additional first power reception amount information, and, if the additional second power transmission efficiency is less than the predetermined value a predetermined number of times in a predetermined period corresponding to the first power reception amount information and the additional first power reception amount information, the circuitry excludes the second one of the parameters from the parameter information.

9. The power transmission device according to claim 8, wherein the circuitry periodically or aperiodically includes the parameter in the parameter information after the circuitry has excluded the parameter from the parameter information.

10. The power transmission device according to claim 1, wherein the circuitry transmits the power capability information transmission request, before the circuitry starts wirelessly transmitting the power, one of the parameters does not exceed a power reception capability indicated by the power capability information, the circuitry transmits parameter information, receives second power reception amount information after the circuitry wirelessly transmits the power, and calculates a plurality of third power transmission efficiencies of the parameters based on the second power reception amount information, to set a standard range based on the plurality of third power transmission efficiencies, and to exclude of the one of the parameters from the parameter information if the third power transmission efficiency of the one of the plurality of parameters is outside the standard range.

11. The power transmission device according to claim 10, wherein the circuitry is configured to calculate a power transmission unit price corresponding to the standard range, the circuitry transmits information indicating the power transmission unit price, and the circuitry wirelessly transmits the power using the one of the parameters if the circuitry receives a power transmission start request in response to the information indicating the power transmission unit price.

12. The power transmission device according to claim 10, wherein, if the third power transmission efficiency of the one of the plurality of parameters is outside the standard range, the circuitry stops wirelessly transmitting the power.

13. The power transmission device according to claim 1, wherein the circuitry transmits or receives connection information for forming the communication channel via a non-contact communication using a carrier of a predetermined frequency.

14. The power transmission device according to claim 13, wherein the circuitry transmits the power capability information transmission request via the non-contact communication, receives the power capability information via the non-contact communication, and the one of the parameters does not exceed a power reception capability indicated by the power capability information.

15. The power transmission device according to claim 1, wherein the circuitry is configured to produce the randomized parameter information for every transmission period.

16. The power transmission device according to claim 1, wherein the circuitry sequentially transmits the randomized parameter information for a power transmission period, and the circuitry sequentially transmits the power in the power transmission period.

20. The power transmission device according to claim 1, comprising:

a display screen configured to present information associated to a calibration process of the power transmission device to a user.

21. The power transmission device according to claim 20, wherein the information includes a power transmission efficiency range based on a measurement result.

22. The power transmission device according to claim 21, wherein the information includes a fee range for an amount of power transmission based on the power transmission efficiency range.

17. A power transmission method, comprising:

transmitting a power capability information transmission request;

receiving power capability information in response to the power capability information transmission request;

transmitting randomized parameter information by a communication channel;

producing the randomized parameter information, based on the power capability information;

wirelessly transmitting power based on the randomized parameter information;

receiving first power reception amount information for one of a plurality of parameters after transmitting the power;

calculating a second power transmission efficiency based on the first power reception amount information; and

generating parameter information excluding the one of the parameters from the parameter information if the second power transmission efficiency is less than a predetermined value.

23. The power transmission method according to claim 17, further comprising:

displaying, on a screen, information associated to a calibration process of a power transmission device to a user.

24. The power transmission method according to claim 23, further comprising:

displaying, on the screen, a power transmission efficiency range based on a measurement result.

25. The power transmission method according to claim 24, further comprising:

displaying, on the screen, a fee range for an amount of power transmission based on the power transmission efficiency range.

18. A non-transitory computer readable medium storing computer readable instructions thereon that, when executed by a computer, causes the computer to perform a method comprising:

transmitting a power capability information transmission request;

receiving power capability information in response to the power capability information transmission request;

transmitting randomized parameter information by a communication channel;

producing the randomized parameter information, based on the power capability information;

wirelessly transmitting power based on the randomized parameter information by a power transmission device;

receiving first power reception amount information for one of a plurality of parameters after transmitting the power;

calculating a second power transmission efficiency based on the first power reception amount information; and

generating parameter information excluding the one of the parameters from the parameter information if the second power transmission efficiency is less than a predetermined value.

19. A power reception device, comprising:

circuitry configure to

store power capability information;

receive a power capability information transmission request, transmits the power capability information in response to the power capability information transmission request, and receives randomized parameter information via a communication channel;

receive power based on the randomized parameter, information from a power transmission device; and

receive parameter information excluding one of a plurality of parameters,

wherein the power transmission device receives first power reception amount information for the one of a plurality of parameters after transmitting the power, calculates a second power transmission efficiency based on the first power reception amount information, and generates the parameter information excluding the one of the parameters from the parameter information if the second power transmission efficiency is less than a predetermined value.