Techniques for wireless power transmission system handoff and load balancing

• US 10,498,177 B2
• Filed: 06/29/2016
• Issued: 12/03/2019
• Est. Priority Date: 06/30/2015
• Status: Active Grant

• Current Assignee: Ossia, Inc.
• Original Assignee: Ossia, Inc.
• Inventors: Zeine, Hatem, Mayes, Dale
• Primary Examiner(s): Wells, Kenneth B
• Application Number:
  US15/196,618
• Publication Number:
  US 20170005520A1
• Time in Patent Office: 1,252 Days
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving

Abstract

Techniques are described herein for load balancing wireless power receiver clients over multiple wireless power transmission systems in a wireless power delivery environment. In some embodiments, a method is described. The method includes identifying transmitter load information associated with at least two wireless power transmission systems of the multiple wireless power transmission systems, detecting a load imbalance between the at least two wireless power transmission systems based, at least in part, on the transmitter load information, and determining one or more operations for improving the load imbalance. The method further includes directing one or more of the at least two wireless power transmission systems to perform the one or more operations.

Claims

1. A method of load balancing wireless power receiver clients over multiple retrodirective wireless power transmission systems in a wireless power delivery environment, the method comprising:

identifying transmitter load information associated with at least two geographically diverse wireless power transmission systems of the multiple retrodirective wireless power transmission systems,

wherein each wireless power transmission system is configured to transmit directed wireless power to a wireless power receiver client over multiple paths via multiple adaptively phased antennas;

detecting a load imbalance between the at least two wireless power transmission systems based, at least in part, on the transmitter load information;

determining one or more operations for improving the load imbalance including directing one or more of the at least two wireless power transmission systems to handoff one or more wireless power receiver clients; and

directing one or more of the at least two wireless power transmission systems to perform the one or more operations.

2. The method of claim 1, wherein the one or more operations, when performed by a wireless power transmission system, direct the one or more of the at least two wireless power transmission systems to handoff one or more wireless power receiver clients.

3. The method of claim 1, wherein the client load imbalance includes at least one over-utilized wireless power transmission system.

4. The method of claim 3, wherein the one or more operations, when performed by a wireless power transmission system, direct the over-utilized wireless power transmission system to discontinue accepting requests for wireless power from wireless power receiver clients.

5. The method of claim 1, wherein detecting the load imbalance between the at least two wireless power transmission systems further comprises:

measuring the loads of the at least two wireless power transmission systems of the multiple wireless power transmission systems based on the corresponding transmitter load information.

6. The method of claim 5, wherein the loads of the at least two wireless power transmission systems are measured based on a number of devices being serviced.

7. The method of claim 5, wherein the loads of the at least two wireless power transmission systems are measured based on energy requirements of devices being serviced, charging efficiency of the devices being serviced, priorities of the devices being serviced, or locations of the devices being serviced.

8. The method of claim 5, wherein detecting the load imbalance between the at least two wireless power transmission systems further comprises:

comparing the transmitter load information associated with the at least two wireless power transmission systems to identify the load imbalance; and

determining that the load imbalance exceeds a balance threshold.

9. The method of claim 1, further comprising:

monitoring the transmitter load information associated with the multiple wireless power transmission systems.

10. The method of claim 1, further comprising:

coordinating awareness between the at least two wireless power transmission systems.

11. An apparatus comprising:

one or more computer readable storage media; and

program instructions stored on the one or more computer readable storage media, wherein the program instructions, when executed by a processing system, direct the processing system to;

identify transmitter load information associated with at least two wireless power transmission systems of multiple retrodirective wireless power transmission systems in a wireless power delivery environment,

wherein each wireless power transmission system is configured to transmit directed wireless power to a wireless power receiver client over multiple paths via multiple antennas;

detect a load imbalance between the at least two wireless power transmission systems based, at least in part, on the transmitter load information;

determine one or more operations for improving the load imbalance including directing one or more of the at least two wireless power transmission systems to handoff one or more wireless power receiver clients; and

direct one or more of the at least two wireless power transmission systems to perform the one or more operations.

12. An apparatus of claim 11, wherein the one or more operations direct the one or more of the at least two wireless power transmission systems to handoff one or more wireless power receiver clients.

13. An apparatus of claim 11, wherein the client load imbalance includes at least one over-utilized wireless power transmission system, and wherein the one or more operations direct the over-utilized wireless power transmission system to discontinue accepting request for wireless power from wireless power receiver clients.

14. An apparatus of claim 11, wherein to detect the load imbalance between the at least two wireless power transmission systems, the program instructions, when executed by a processing system, further direct the processing system to:

measure the loads of the at least two wireless power transmission systems of the multiple wireless power transmission systems based on the corresponding transmitter load information.

15. An apparatus of claim 14, wherein the loads of the at least two wireless power transmission systems are measured based on a number of devices being serviced.

16. An apparatus of claim 14, wherein the loads of the at least two wireless power transmission systems are measured based on energy requirements of devices being serviced, charging efficiency of the devices being serviced, priorities of the devices being serviced, or locations of the devices being serviced.

17. An apparatus of claim 14, wherein to detect the load imbalance between the at least two wireless power transmission systems, the program instructions, when executed by a processing system, further direct the processing system to:

compare the transmitter load information associated with the at least two wireless power transmission systems to identify the load imbalance; and

determine that the load imbalance exceeds a balance threshold.

18. An apparatus of claim 14, wherein the program instructions, when executed by a processing system, further direct the processing system to:

monitor the transmitter load information associated with the multiple wireless power transmission systems.

19. A wireless power transmission system, comprising:

an adaptively-phased antenna array having multiple radio frequency (RF) transceivers;

control circuitry configured to;

identify transmitter load information associated with at least two wireless power transmission systems of multiple retrodirective wireless power transmission systems in a wireless power delivery environment,

wherein each wireless power transmission system is configured to transmit directed wireless power to a wireless power receiver client over multiple paths via multiple antennas;

detect a load imbalance between the at least two wireless power transmission systems based, at least in part, on the transmitter load information;

determine one or more operations for improving the load imbalance including directing one or more of the at least two wireless power transmission systems to handoff one or more wireless power receiver clients; and

direct one or more of the at least two wireless power transmission systems to perform the one or more operations.

20. The wireless power transmission system of claim 19, wherein the control system is further configured to direct the one or more of the at least two wireless power transmission systems to handoff one or more wireless power receiver clients.