Systems and methods for determining when to transmit power waves to a wireless power receiver

Patent metadata

Field	Value
Publication number	US-10554052-B2
Application number	US-201815884303-A
Country	US
Kind code	B2
Filing date	Jan 30, 2018
Priority date	Jul 14, 2014
Publication date	Feb 4, 2020
Grant date	Feb 4, 2020

Abstract

Wireless power transmitters and methods of management thereof are disclosed herein. An example wireless power transmitter includes an antenna array and a communication radio configured to: establish a communication connection with a respective wireless power receiver; and receive device data from the respective wireless power receiver, the device data used to determine a location of the respective wireless power receiver. The example wireless power transmitter also includes a controller in communication with the antenna array and the communication radio, the controller configured to: determine whether the respective wireless power receiver is authorized to receive power from the wireless power transmitter; if so, determine a particular time at which RF power waves should be transmitted to the respective receiver, the particular time based at least in part on a charging schedule for the transmitter; and instruct the antenna array to transmit radio frequency (RF) power waves at the particular time.

First claim

What is claimed is:

1. A wireless power transmitter, comprising:
an antenna array configured to transmit radio frequency (RF) power waves;
a communications component configured to:
establish a communication connection with a respective wireless power receiver of one or more wireless power receivers located within a transmission field of the wireless power transmitter; and
after establishing the communication connection, receive device data from the respective wireless power receiver, wherein the device data includes data used to determine a location of the respective wireless power receiver; and

a controller in communication with the antenna array and the communications component, the controller configured to:
determine whether the respective wireless power receiver is authorized to receive wireless power from the wireless power transmitter;
in accordance with determining that the respective wireless power receiver is authorized to receive wireless power from the wireless power transmitter, determine a particular time at which RF power waves should be transmitted to the respective wireless power receiver, the particular time based at least in part on a charging schedule for the wireless power transmitter; and
instruct the antenna array to transmit radio frequency RF power waves at the particular time, the RF power waves being transmitted so that the RF power waves constructively interfere near the location of the wireless power receiver.

2. The wireless power transmitter of claim 1 , wherein:
the device data comprises an identifier for the respective wireless power receiver; and
the controller is configured to determine whether the respective wireless power receiver is authorized to receive wireless power from the wireless power transmitter using the identifier for the respective wireless power receiver.

3. The wireless power transmitter of claim 1 , wherein:
the device data comprises a charge level of the respective wireless power receiver;
the controller is configured to:
determine whether the charge level of the respective wireless power receiver is less than a minimum charge level; and
instruct the antenna array to transmit the RF power waves at the particular time in accordance with a determination that the charge level of the respective wireless power receiver is less than the minimum charge level.

4. The wireless power transmitter of claim 1 , wherein the communications component is further configured to:
transmit the device data to a remote server; and
receive, from the remote server, the charging schedule for the wireless power transmitter, wherein the remote server generates the charging schedule based, at least in part, on the device data.

5. The wireless power transmitter of claim 4 , wherein the charging schedule for the wireless power transmitter further specifies when and to which of the one or more wireless power receivers, other than the respective wireless power receiver, the wireless power transmitter should transmit RF power waves.

6. The wireless power transmitter of claim 4 , wherein:
the communications component is further configured to receive, from the remote server, an indication that the receiver is authorized to receive wireless power from the wireless power transmitter; and
the controller is configured to determine whether the respective wireless power receiver is authorized to receive wireless power from the wireless power transmitter based on the indication received from the remote server.

7. The wireless power transmitter of claim 1 , wherein the device data comprises data selected from the group consisting of: device identification data for the respective wireless power receiver, device voltage range data for the respective wireless power receiver, and device signal strength data for the respective wireless power receiver.

8. A method comprising:
at a wireless power transmitter including an antenna array, a communications component, and a controller in communication with the antenna array and the communications component:
establishing, by the communications component, a communication connection with a respective wireless power receiver of one or more wireless power receivers located within a transmission field of the wireless power transmitter;
after establishing the communication connection: receiving, by the communications component, device data from the respective wireless power receiver, wherein the device data includes data used to determine a location of the respective wireless power receiver;
determining, by the controller, whether the respective wireless power receiver is authorized to receive wireless power from the wireless power transmitter;
in accordance with determining that the respective wireless power receiver is authorized to receive wireless power from the wireless power transmitter: determining, by the controller, a particular time at which radio frequency (RF) power waves should be transmitted to the respective wireless power receiver, the particular time based at least in part on a charging schedule for the wireless power transmitter; and
instructing, by the controller, the antenna array to transmit RF power waves at the particular time, the RF power waves being transmitted so that the RF power waves constructively interfere near the location of the wireless power receiver.

9. The method of claim 8 , wherein:
the device data comprises an identifier for the respective wireless power receiver; and
the identifier for the respective wireless power receiver is used for determining whether the respective wireless power receiver is authorized to receive wireless power from the wireless power transmitter.

10. The method of claim 8 , wherein:
the device data comprises a charge level of the respective wireless power receiver;
the method further comprises determining whether the charge level of the respective wireless power receiver is less than a minimum charge level; and
instructing the antenna array to transmit the RF power waves at the particular time is performed in accordance with a determination that the charge level of the respective wireless power receiver is less than the minimum charge level.

11. The method of claim 8 , further comprising, at the wireless power transmitter:
transmitting, by the communications component, the device data to a remote server; and
receiving, by the communications component from the remote server, the charging schedule for the wireless power transmitter, wherein the remote server generates the charging schedule based, at least in part, on the device data.

12. The method of claim 11 , wherein the charging schedule for the wireless power transmitter further specifies when and to which of the one or more wireless power receivers, other than the respective wireless power receiver, the wireless power transmitter should transmit RF power waves.

13. The method of claim 11 , further comprising, at the wireless power transmitter:
receiving, by the communications component from the remote server, an indication that the receiver is authorized to receive wireless power from the wireless power transmitter,
wherein determining whether the respective wireless power receiver is authorized to receive wireless power from the wireless power transmitter is based on the indication received from the remote server.

14. The method of claim 8 , wherein the device data comprises data selected from the group consisting of: device identification data for the respective wireless power receiver, device voltage range data for the respective wireless power receiver, and device signal strength data for the respective wireless power receiver.

Assignees

• Energous Corp

Inventors

• Bell Douglas
• Leabman Michael A

Classifications

• H02J7/82

  Control of state of charge [SOC] · CPC title

• H02J7/47

  Arrangements for checking compatibility or authentication between one component, e.g. a battery or a battery charger, and another component, e.g. a power source · CPC title

• H02J13/1321 Primary

  using a wired telecommunication network or a data transmission bus · CPC title

• H04W24/02

  Arrangements for optimising operational condition · CPC title

• H02J50/20

  using microwaves or radio frequency waves · CPC title