Wireless power transmission system

• US 10,008,887 B2
• Filed: 09/21/2015
• Issued: 06/26/2018
• Est. Priority Date: 06/14/2007
• Status: Active Grant

• Current Assignee: Ossia, Inc.
• Original Assignee: Ossia, Inc.
• Inventors: Zeine, Hatem
• Primary Examiner(s): Zimmerman, Brian
• Assistant Examiner(s): Eustaquio, Cal
• Application Number:
  US14/859,909
• Publication Number:
  US 20160013685A1
• Time in Patent Office: 1,009 Days
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/23 characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• CPC Class Codes: H02J 50/27 characterised by the type of receiving antennas, e.g. rectennas
• 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 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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 7/007 Regulation of charging or discharging current or voltage

Abstract

The wireless power transmission is a system for providing wireless charging and/or primary power to electronic/electrical devices via microwave energy. The microwave energy is focused to a location by a power transmitter having one or more adaptively-phased microwave array emitters. Rectennas within the device to be charged receive and rectify the microwave energy and use it for battery charging and/or for primary power.

Claims

1. A wireless power transmitter comprising:

a controller; and

a phased array antenna communicatively coupled to the controller, the phased array antenna having a plurality of electro-magnetic array transceivers for transmitting an electro-magnetic power transmission signal;

wherein the controller;

detects a presence of a plurality of mobile receivers including a first mobile receiver,

transmits, using a first subset of the plurality of electro-magnetic array transceivers, a first electro-magnetic power transmission signal to the plurality of mobile receivers at a first frequency, wherein the first subset of the plurality of electro-magnetic array transceivers are tuned to the first frequency,

receives, using the phased array antennae, a first indication of a power level of the first electro-magnetic power transmission signal from the first mobile receiver,

determines a second frequency based upon the first indication of the power level,

tunes a second subset of the plurality of electro-magnetic array transceivers to the second frequency,

during a first period, concurrently transmits to the first mobile receiver, the first electro-magnetic power signal using the first subset at the first frequency and a second electro-magnetic power transmission signal using the second subset at the second frequency, and

during a second period that is subsequent to the first period, stops transmitting the first electro-magnetic power transmission signal after the second electro-magnetic power transmission signal is transmitted.

2. The wireless power transmitter of claim 1, wherein the phased array antenna includes array antennae that are arranged in a non-planar form.

3. The wireless power transmitter of claim 1 wherein the controller further selects the first mobile receiver based upon a prioritization of the plurality of mobile receivers.

4. The wireless power transmitter of claim 1, wherein the first electro-magnetic power transmission signal and the second electro-magnetic power signal are microwaves.

16. The wireless power transmitter of claim 1, wherein the plurality of receivers includes a second mobile receiver;

wherein the controller further;

receives, using the phased array antennae, a second indication of a power level of the first electro-magnetic power transmission signal from the second mobile receiver,

determines a third frequency based upon the second indication of the power level,

tunes a third subset of the plurality of electro-magnetic array transceivers to the third frequency,

during a third period, concurrently transmits to the second mobile receiver, the first electro-magnetic power signal using the first subset and a third electro-magnetic power transmission signal using the third subset, and

during a fourth period subsequent to the third period, stops transmitting the first electro-magnetic power transmission signal after the second electro-magnetic power transmission signal and the third electro-magnetic transmission signal are transmitted.

5. A wireless power receiver comprising:

a rectifier that concurrently receives electro-magnetic power transmission signals from a wireless power transmitter that are transmitted at a first frequency and a second frequency and feed a received electro-magnetic power transmission signals to a power meter;

wherein the power meter measures a power signal strength indication of the received electro-magnetic power transmission signals and provide a control logic with the power signal strength indication;

wherein the control logic receives the power signal strength indication and transmits the power signal strength indication to the wireless power transmitter; and

wherein the wireless power transmitter;

detects a presence of a plurality of wireless power receivers including the wireless power receiver,

transmits a first electro-magnetic power transmission signal to the wireless power receiver at the first frequency using a first subset of a plurality of electro-magnetic array transceivers,

receives the indication of a power level from the wireless power receiver,

determines the second frequency based upon the indication of the power level,

tunes a second subset of the plurality of electro-magnetic array transceivers to the second frequency,

during a first period, concurrently transmits to the receiver, the first electro-magnetic power transmission signal using the first subset and a second electro-magnetic power transmission signal using the second subset, and

during a second period subsequent to the first period, stops transmitting the first electro-magnetic power transmission signal to the receiver after the second electro-magnetic power transmission signal is transmitted.

6. The wireless power receiver of claim 5, wherein the first electro-magnetic power transmission signal and the second electro-magnetic power transmission signal are microwaves.

7. The wireless power receiver of claim 5, wherein the transmitter further determines a prioritization of the plurality of wireless power receivers.

8. The wireless power receiver of claim 5, wherein the receiver further charges an internal battery with energy from the first electro-magnetic power transmission signal and the second electro-magnetic power transmission signal.

9. The wireless power receiver of claim 5, wherein the receiver further powers internal circuitry with energy from the first electro-magnetic power transmission signal and the second electro-magnetic power transmission signal.

17. The wireless power receiver of claim 5, wherein the plurality of wireless power receivers includes a second mobile power receiver;

wherein the wireless power transmitter further;

receives a second indication of a power level of the first electro-magnetic power transmission signal from the second mobile power receiver,

determines a third frequency based upon the second indication of the power level,

tunes a third subset of the plurality of electro-magnetic array transceivers to the third frequency,

during a third period, concurrently transmits to the second mobile power receiver, the first electro-magnetic power signal using the first subset and a third electro-magnetic power transmission signal using the third subset, and

during a fourth period subsequent to the third period, stops transmitting the first electro-magnetic power transmission signal after the second electro-magnetic power transmission signal and the third electro-magnetic transmission signal are transmitted.

10. A method for receiving power and data communication wirelessly from a wireless power transmitter comprising:

detecting, by the wireless power transmitter, a presence of a plurality of mobile receivers including a first mobile receiver;

transmitting, by the wireless power transmitter, a first electro-magnetic power transmission signal to the plurality of mobile receivers at a first frequency using a first subset of a plurality of electro-magnetic array transceivers;

receiving, by the wireless power transmitter, a first indication of a power level of the first electro-magnetic power transmission signal from the first mobile receiver;

determining, by the wireless power transmitter, a second frequency based upon the first indication of the power level;

tuning, by the wireless power transmitter, a second subset of the plurality of electro-magnetic array transceivers to the second frequency;

during a first period, concurrently transmitting, by the wireless power transmitter, to the first mobile receiver the first electro-magnetic power transmission signal using the first subset and a second electro-magnetic power transmission signal using the second subset;

receiving, by the wireless power transmitter, a second indication of a power level of the first electro-magnetic power transmission signal from a second mobile receiver; and

during a second period subsequent to the first period, stopping, by the wireless power transmitter, the transmission of the first electro-magnetic power transmission signal to the first mobile receiver after the second electro-magnetic power transmission signal is transmitted.

11. The method for receiving power and data communication wirelessly from a wireless power transmitter of claim 10, wherein the wireless power transmitter includes array antennae that are arranged in a non-planar form.

12. The method for receiving power and data communication wirelessly from a wireless power transmitter of claim 10, further comprising:

selecting, by the wireless power transmitter, the first mobile receiver based upon a prioritization of the plurality of mobile receivers.

13. The method for receiving power and data communication wirelessly from a wireless power transmitter of claim 10, wherein the first electro-magnetic power transmission signal and the second electro-magnetic power transmission are microwaves.

14. The method for receiving power and data communication wirelessly from a wireless power transmitter of claim 10, further comprising:

charging, by the first mobile receiver, an internal battery of the first mobile receiver with energy from the first electro-magnetic power transmission signal and the second electro-magnetic power transmission signal.

15. The method for receiving power and data communication wirelessly from a wireless power transmitter of claim 10, further comprising:

powering, by the first mobile receiver, internal circuitry of the first mobile receiver with energy from the first electro-magnetic power transmission signal and the second electro-magnetic power transmission signal.

18. The method for receiving power and data communication wirelessly from a wireless power transmitter of claim 10, wherein the plurality of mobile receivers further includes a second mobile receiver;

wherein the method further comprises;

receiving, by the wireless power transmitter, a second indication of a power level of the first electro-magnetic power transmission signal from the second mobile receiver,

determining a third frequency based upon the second indication of the power level,

tuning, by the wireless power transmitter, a third subset of the plurality of electro-magnetic array transceivers to the third frequency,

during a third period, concurrently transmitting, by the wireless power transmitter, to the second mobile receiver, the first electro-magnetic power signal using the first subset and a third electro-magnetic power transmission signal using the third subset, and

during a fourth period subsequent to the third period, stopping, by the wireless power transmitter, the transmission of the first electro-magnetic power transmission signal to the second mobile receiver after the second electro-magnetic power transmission signal and the third electro-magnetic transmission signal are transmitted.