WIRELESS CHARGING OF TOOLS USING A TOOLBOX TRANSMITTER

• US 20150102769A1
• Filed: 10/10/2013
• Published: 04/16/2015
• Est. Priority Date: 05/10/2013
• Status: Abandoned Application

• Current Assignee: Energous Corporation
• Original Assignee: DvineWave, Inc.
• Inventors: Leabman, Michael A., Brewer, Gregory Scott
• Application Number:
  US14/051,128
• Publication Number:
  US 20150102769A1
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

Configurations and methods of wireless power transmission for cordless power tools are disclosed. Wireless power transmission for charging one or more cordless power tools may include a toolbox with an embedded transmitter capable of emitting RF waves for the generation of pockets of energy; a battery attached or embedded in the toolbox to supply power to the transmitter; a cable that may connect toolbox'"'"'s battery to a suitable external power source for charging; and one or more cordless power tools which may include rechargeable batteries and receivers that may utilize pockets of energy for wireless charging or powering. When the battery in the toolbox is charged to suitable levels, the toolbox can be disconnected from the external power source and carried to an area or location where one or more cordless power tools may receive wireless charging.

Claims

1. A method for wireless transmission of power to a cordless power tool, comprising:

connecting a pocket-forming transmitter to a power source;

generating RF waves from a RF circuit embedded within the transmitter;

generating communication signals from a communication circuit embedded with the transmitter;

controlling the generated RF waves and the communication signals with a digital signal processor in the transmitter;

transmitting the power RF waves and communication signals through an antenna connected to the transmitter; and

capturing the RF waves forming pockets of energy in 3-D space at a receiver with an antenna connected to the cordless power tool to convert the power RF waves into a DC voltage for charging or powering a battery of the cordless tool,

2. The method for wireless transmission of power to a cordless power tool of claim 1, wherein the receiver includes a communication circuit to communicate power and receiver location information via communication signals between the transmitter and receiver.

5. The method for wireless transmission of power to a cordless power tool of claim 1, wherein the pocket-forming transmitter is located in a portable toolbox having a fully charged battery connected to the transmitter as a power source.

6. The method for wireless transmission of power to a cordless power tool of claim 1, wherein the pocket-forming transmitter in the portable toolbox is located in a vehicle wherein the toolbox battery is connected to the vehicle battery as a source to charge the toolbox battery.

7. The method for wireless transmission of power to a cordless power tool of claim 5, wherein the toolbox transmitter is used to charge the cordless power tool and an extra cordless tool battery connected to a battery charger having a receiver to convert the pockets of energy into the DC charging voltage for the extra battery.

8. The method for wireless transmission of power to a cordless power tool of claim 1, wherein the pocket-forming transmitter is mounted within a vehicle and the power source is a vehicle battery used by the transmitter to wirelessly charge the cordless power tool located in a predetermined distance from the vehicle and to wirelessly charge an extra battery in a battery charger mounted in the vehicle having a receiver attached or connected to the battery charger for receiving the pockets of energy.

9. The method for wireless transmission of power to a cordless power tool of claim 1, wherein the receiver is embedded or attached to the cordless power tool or a battery charger.

10. The method for wireless transmission of power to a cordless power tool of claim 1, wherein the antennas in the transmitter and receiver operate in the frequency bands of 900 MHz, 2.5 GHz or 5.8 GHz.

11. The method for wireless transmission of power to a cordless power tool of claim 1, further includes the step of generating multiple pockets of energy from the pocket forming transmitter to power or charge multiple cordless power tools within a predetermined distance from the transmitter.

12. The method for wireless transmission of power to a cordless power tool of claim 1, wherein the digital signal processor is a microprocessor or microcontroller controlling the RF and communication circuits.

13. The method for wireless transmission of power to a cordless power tool of claim 1, further comprising the step of communicating between the receiver and the transmitter through the communication signals or pilot signals on conventional wireless communication protocols including Bluetooth, Wi-Fi, Zigbee or FM radio signals.

14. The method for wireless transmission of power to a cordless power tool of claim 1, wherein the communication signals sent by the receiver provide optimum times and locations for transmitter pocket-forming and the convergence of pockets of energy in 3-D space to predetermined cordless power tools or an extra battery charger within predetermined distances from the transmitter.

16. The wireless transmission of power to a cordless power tool of claim 14, wherein the pocket-forming transmitter is located in close proximity to a work project where the cordless power tool is used to charge or power the cordless power tool battery during the operation of the cordless power tool.

17. The wireless transmission of power to a cordless power tool of claim 14, wherein the pocket-forming transmitter is located in a toolbox and connected to an electrical outlet or to a storage battery located in the toolbox.

18. The wireless transmission of power to a cordless power tool of claim 14, wherein the receiver is embedded or attached to the cordless power tool and connected to the cordless power tool battery.

19. The wireless transmission of power to a cordless power tool of claim 14, wherein the transmitter is mounted within a vehicle and connected to a vehicle battery for the power source or the transmitter within the vehicle is located in a toolbox having a toolbox battery for the power source connected to the vehicle battery as a further backup power source for the toolbox battery.

21. The apparatus for wireless power transmission to a cordless power tool of claim 19, wherein the communication circuitry of the transmitter and receiver utilizes Bluetooth, infrared, Wi-Fi, FM radio or Zigbee for the communication protocols between the receiver and the transmitter.

22. The apparatus for wireless power transmission to a cordless power tool of claim 19, wherein the transmitter further includes flat antenna elements, patch antenna elements or dipole antenna elements with heights from approximately 1/24 inches to about 1 inch and widths from approximately 1/24 inches to about 1 inch.

23. The apparatus for wireless power transmission to a cordless power tool of claim 19, wherein the antenna elements of the transmitter operate in frequency bands of 900 MHz, 2.5 GHz or 5.8 GHz.

24. The apparatus for wireless power transmission to a cordless power tool of claim 19, wherein the antenna elements of the transmitter operate in independent frequencies that allow a multichannel operation of pocket-forming in a single array, pair array, quad array or other suitable arrangement for powering the cordless power tool or a portable battery charger located in a toolbox or a vehicle with the transmitter located in close proximity thereto,

25. The apparatus for wireless power transmission to a cordless power tool of claim 19, wherein the antenna elements of the transmitter include polarization of vertical pole, horizontal, circularly polarized, left hand polarized, right hand polarized or a combination of polarizations to maximize the transmission of pockets of energy to predetermined cordless power tools or battery chargers in close proximity to the transmitter.

3. A method for wireless transmission of power to a cordless power tool, comprising:

connecting a pocket-forming transmitter to a power source;

generating pocket forming RF waves from a RF circuit embedded within the transmitter;

generating communication signals from a communication circuit embedded within the transmitter;

controlling the generated RF waves and the communication signals with a digital signal processor;

transmitting the RF waves and communication signals through at least two antennas electrically connected to the RF and communication circuits within the transmitter; and

capturing pockets of energy produced by the pocket-forming RE waves converging in 3-D space at a receiver with an antenna connected to a battery of the cordless power tool wherein the pockets of energy are converted into a DC voltage for charging the battery or powering the cordless power tool and wherein communication signals are generated at the receiver to provide location and power requirements of the cordless tool to the transmitter.

4. The method for wireless transmission of power to a cordless power tool, comprising the steps of:

emitting RF waves from a pocket-forming transmitter to generate multiple pockets of energy in 3-D space through pocket-forming;

coupling receivers to the battery of multiple cordless tools;

capturing the multiple pockets of energy in 3-D space at the receivers; and

powering or charging the battery of multiple cordless tools from the pockets of energy.

15. A wireless transmission of power to a cordless power tool, comprising:

a pocket-forming transmitter for emitting power RF waves to form pockets of energy to converge in 3-d space connected to a power source; and

a receiver embedded or attached to the cordless power tool for receiving and converting the pockets of energy to a DC voltage for charging or powering a cordless power tool battery connected to the cordless tool.

20. An apparatus for wireless power transmission to a cordless power tool, comprising:

a battery connected to the cordless power tool;

a portable pocket-forming transmitter having at least two or more antenna elements, at least one RF integrated circuit, at least one digital signal processor or micro-controller, one communication circuit to generate pockets of energy consisting of constructive patterns of power RF waves in 3-D space; and

a receiver embedded or attached to the cordless power tool having at least one antenna element, at least one rectifier, at least one power converter and a communication circuit for communicating with the transmitter the exact location and power requirements of the cordless power tool for receiving the pockets of energy in 3-D space to charge or power the cordless power tool.