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

• US 10,523,277 B2
• Filed: 04/17/2018
• Issued: 12/31/2019
• 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): Jiang, Yong Hang
• Application Number:
  US15/954,707
• Publication Number:
  US 20180241437A1
• Time in Patent Office: 623 Days
• Field of Search: 340 42, 340 101, 340 1034, 340 1323, 340 1324, 340 1325
• CPC Class Codes: H02J 50/05 using capacitive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• 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: H04B 5/24 Inductive coupling
• 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
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

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

Claims

1. A power transmission device, comprising:

a communication unit configured to;

transmit a power capability information transmission request via a communication channel; and

receive power capability information based on the power capability information transmission request, wherein the power capability information indicates a transmission type;

a processing unit configured to;

set a parameter based on the received power capability information; and

calculate a plurality of power transmission efficiencies based on the power capability information; and

a power transmission unit configured to wirelessly transmit power based on a first power transmission efficiency of the plurality of power transmission efficiencies, wherein;

the parameter is within a power reception capability indicated by the power capability information,

the communication unit is further configured to;

transmit parameter information,

receive second power reception amount information after the power transmission unit wirelessly transmits the power, and

the processing unit is further configured to;

calculate a plurality of second power transmission efficiencies of a plurality of parameters based on the second power reception amount information,

set a standard range based on the plurality of second power transmission efficiencies, and

exclude one of the plurality of parameters from the parameter information when a second power transmission efficiency, of the plurality of second power transmission efficiencies, of the one of the plurality of parameters is outside the standard range.

2. The power transmission device according to claim 1, wherein the power capability information further indicates 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, or an electric-field resonance, and

the power transmission unit is further configured to wirelessly transmit the power based on at least one of the electromagnetic induction, the electric waves, the magnetic-field resonance, or the electric-field resonance.

4. The power transmission device according to claim 2, wherein:

the parameter type is defined by at least one of a frequency, a voltage, or an azimuth angle, and

the power transmission unit is further configured to wirelessly transmit the power based on at least one of the frequency, the voltage, or the azimuth angle.

5. The power transmission device according to claim 2,

further comprising a storage unit configured to store transmission power capability information,

wherein the processing unit is further configured to set the parameter by comparison of 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.

6. The power transmission device according to claim 2, wherein the processing unit is further configured to:

calculate the plurality of power transmission efficiencies for each parameter of a plurality of parameters of the parameter type; and

set the standard range based on a maximum power transmission efficiency of the plurality of power transmission efficiencies.

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

8. The power transmission device according to claim 1, wherein:

the communication unit is further configured to receive first power reception amount information for the parameter, after the transmission of the power, and

the processing unit is further configured to;

calculate the first power transmission efficiency based on the first power reception amount information, and

control the power transmission unit to stop the transmission of the power when the first power transmission efficiency is less than a value.

9. The power transmission device according to claim 1, wherein:

the communication unit is further configured to receive first power reception amount information for the parameter after the transmission of the power, and

the processing unit is further configured to;

calculate a third power transmission efficiency based on the first power reception amount information, and

generate parameter information excluding the parameter when the third power transmission efficiency is less than a value.

10. The power transmission device according to claim 9,

wherein, when the communication unit receives additional first power reception amount information for the parameter, the processing unit is further configured to calculate an additional third power transmission efficiency based on the additional first power reception amount information, and

wherein, when the additional third power transmission efficiency is less than the value a number of times in a period corresponding to the first power reception amount information and the additional first power reception amount information, the processing unit is further configured to exclude the parameter from the parameter information.

11. The power transmission device according to claim 10,

wherein the processing unit is further configured to one of periodically or aperiodically include the parameter in the parameter information after the processing unit has excluded the parameter from the parameter information.

12. The power transmission device according to claim 1, wherein:

the processing unit is further configured to calculate a power transmission unit price corresponding to the standard range,

the communication unit is further configured to transmit information indicating the power transmission unit price, and

the power transmission unit is further configured to wirelessly transmit the power based on the parameter when the communication unit receives a power transmission start request based on the information indicating the power transmission unit price.

13. The power transmission device according to claim 1,

wherein, when the second power transmission efficiency of the one of the plurality of parameters is outside the standard range, the power transmission unit is further configured to stop wireless transmission of the power.

14. The power transmission device according to claim 1,

wherein the communication unit is further configured to one of transmit or receive connection information for formation of the communication channel via a non-contact communication based on a carrier of a frequency.

15. The power transmission device according to claim 14,

wherein the communication unit is further configured to:

transmit the power capability information transmission request via the non-contact communication, and

receive the power capability information via the non-contact communication, and

wherein the parameter is within a power reception capability indicated by the power capability information.

16. The power transmission device according to claim 1, wherein:

the processing unit is further configured to generate parameter information indicating the parameter, based on parameter candidates of the power,

the parameter candidates of the power correspond to an environment where the power is transmitted, and

the parameter candidates of the power is set based on the power capability information.

17. A power transmission method, comprising:

transmitting a power capability information transmission request via a communication channel;

receiving power capability information based on the power capability information transmission request, wherein the power capability information indicates a transmission type;

setting a parameter based on the received power capability information;

calculating a plurality of power transmission efficiencies based on the power capability information; and

wirelessly transmitting power based on a first power transmission efficiency of the plurality of power transmission efficiencies,

wherein the parameter is within a power reception capability indicated by the power capability information;

transmitting parameter information;

receiving second power reception amount information after the wirelessly transmission of the power;

calculating a plurality of second power transmission efficiencies of a plurality of parameters based on the second power reception amount information;

setting a standard range based on the plurality of second power transmission efficiencies; and

excluding one of the plurality of parameters from the parameter information when a second power transmission efficiency, of the plurality of second power transmission efficiencies, of the one of the plurality of parameters is outside the standard range.

18. A non-transitory computer-readable medium having stored thereon, computer-executable instructions that, when executed by a processor, cause a computer to execute operations, the operations comprising:

transmitting a power capability information transmission request via a communication channel;

receiving power capability information based on the power capability information transmission request, wherein the power capability information indicates a transmission type;

setting a parameter based on the received power capability information;

calculating a plurality of power transmission efficiencies based on the power capability information; and

wirelessly transmitting power based on a first power transmission efficiency of the plurality of power transmission efficiencies,

wherein the parameter is within a power reception capability indicated by the power capability information;

transmitting parameter information;

receiving second power reception amount information after the wirelessly transmission of the power;

calculating a plurality of second power transmission efficiencies of a plurality of parameters based on the second power reception amount information;

setting a standard range based on the plurality of second power transmission efficiencies; and

excluding one of the plurality of parameters from the parameter information when a second power transmission efficiency, of the plurality of second power transmission efficiencies, of the one of the plurality of parameters is outside the standard range.