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

• US 10,855,336 B2
• Filed: 11/18/2019
• Issued: 12/01/2020
• 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:
  US16/686,908
• Publication Number:
  US 20200091966A1
• Time in Patent Office: 379 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 request via a communication channel; and

receive power capability information in response to the request;

a processing unit configured to;

set a parameter of a plurality of parameters based on the power capability information; and

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

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

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

the processing unit is further configured to;

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

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

calculate a power transmission unit price corresponding to the standard range,

the communication unit is further configured to;

transmit information that indicates the power transmission unit price; and

receive a power transmission start request in response to the power transmission unit price, and

the power transmission unit is further configured to wirelessly transmit the power based on the parameter and the reception of the power transmission start request.

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

3. 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.

4. 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; and

add the parameter type indicated by the received power capability information to a parameter type list based on the comparison.

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

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

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

6. The power transmission device according to claim 1, wherein

the power capability information indicates a transmission type,

the transmission type corresponds to 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 the at least one of the electromagnetic induction, the electric waves, the magnetic-field resonance, or the electric-field resonance.

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

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

the processing unit is further configured to:

calculate a specific power transmission efficiency of the plurality of second power transmission efficiencies based on the second power reception amount information; and

control the power transmission unit to stop the transmission of the power based on the specific power transmission efficiency that is less than a threshold power transmission efficiency value.

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

the communication unit is further configured to receive second 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 of the plurality of second power transmission efficiencies based on the second power reception amount information; and

generate parameter information based on the third power transmission efficiency, wherein

the third power transmission efficiency is less than a threshold power transmission efficiency value, and

the parameter information excludes the parameter.

9. The power transmission device according to claim 8, wherein

the communication unit is further configured to receive additional first power reception amount information for the parameter,

the processing unit is further configured to:

calculate a fourth power transmission efficiency of the plurality of second power transmission efficiencies based on the additional first power reception amount information; and

exclude the parameter from the parameter information based on the fourth power transmission efficiency, and

the fourth power transmission efficiency is less than the threshold power transmission efficiency value by a specific number of times in a specific period corresponding to the first power reception amount information and the additional first power reception amount information.

10. The power transmission device according to claim 9, wherein

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

11. The power transmission device according to claim 1, 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,

the processing unit is further configured to

exclude one of the plurality of parameters from the parameter information based on a specific power transmission efficiency of the plurality of second power transmission efficiencies, wherein

the specific power transmission efficiency is associated with the one of the plurality of parameters, and

the specific power transmission efficiency is outside the standard range.

12. The power transmission device according to claim 11, wherein

the power transmission unit is further configured to stop the wireless transmission of the power based on the specific power transmission efficiency, and

the specific power transmission efficiency is outside the standard range.

13. The power transmission device according to claim 1, wherein

the communication unit is further configured to one of transmit or receive connection information,

the connection information corresponds to formation of the communication channel, and

the connection information is transmitted or received via a non-contact communication based on a carrier of a specific frequency.

14. 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 are set based on the power capability information.

15. A power transmission method, comprising:

transmitting a request via a communication channel;

receiving power capability information in response to the request;

setting a parameter of a plurality of parameters based on the power capability information;

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

wirelessly transmitting power based on one of the plurality of first power transmission efficiencies;

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

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

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

calculating a power transmission unit price corresponding to the standard range;

transmitting information that indicates the power transmission unit price;

receiving a power transmission start request in response to the power transmission unit price; and

wirelessly transmitting the power based on the parameter and the reception of the power transmission start request.

16. A power reception device, comprising:

a storage unit configured to store power capability information;

a communication unit configured to;

receive a request via a communication channel;

transmit the power capability information in response to the request; and

receive parameter information based on the power capability information;

a power reception unit configured to wirelessly receive power based on a parameter indicated by the parameter information, wherein

the reception of the request by the communication unit is before the reception of the power by the power reception unit,

the communication unit is further configured to;

transmit power reception amount information;

receive information that indicates a power transmission unit price corresponding to a standard range, wherein

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

the plurality of power transmission efficiencies is calculated based on the power reception amount information; and

transmit a power transmission start request in response to the power transmission unit price, and

the power reception unit is further configured to wirelessly receive the power based on the parameter and the transmission of the power transmission start request.

17. The power reception device according to claim 16, wherein the power capability information includes at least a power reception capability of the power reception device.

18. The power reception device according to claim 17, wherein the parameter indicated by the parameter information corresponds to the power reception capability.

19. The power reception device according to claim 16, wherein a transmission type and parameter candidates of the power are determined based on the power capability information.

20. A power transmission device, comprising:

a communication unit configured to;

transmit a request via a communication channel; and

receive power capability information in response to the request;

a processing unit configured to;

set a parameter of a plurality of parameters based on the power capability information; and

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

a power transmission unit configured to wirelessly transmit power based on one of the plurality of first 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; and

receive first power reception amount information after the transmission of the power, the processing unit is further configured to;

calculate a plurality of second power transmission efficiencies of the plurality of parameters based on the first 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 based on a specific power transmission efficiency of the plurality of second power transmission efficiencies, wherein the specific power transmission efficiency is associated with the one of the plurality of parameters, and the specific power transmission efficiency is outside the standard range, calculate a power transmission unit price corresponding to the standard range, the communication unit is further configured to;

transmit information that indicates the power transmission unit price; and

receive a power transmission start request in response to the power transmission unit price, and the power transmission unit is further configured to wirelessly transmit the power based on the parameter and the reception of the power transmission start request.