Base distribution network for dynamic wireless charging

Patent metadata

Field	Value
Publication number	US-9511674-B2
Application number	US-201414308002-A
Country	US
Kind code	B2
Filing date	Jun 18, 2014
Priority date	Apr 18, 2014
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

Dynamic systems may require a large number of coils (charging pads) which may be installed into the roadway to wirelessly provide power to electric vehicles as they are traveling along the roadway. The current in each of these coils may need to be turned on and off as a vehicle drives over the coils in order to efficiently utilize power and properly convey power to the passing vehicles. The supply network behind these coils may need to be capable of managing the individual coils with minimal infrastructure and cost as well as be capable of distributing the required power from the power grid to these pads efficiently and safely. The supply network may include charging coils, switches, local controllers, and distribution circuitry within a modular element, which may receive power from external sources and may be controlled by a central controller.

First claim

What is claimed is:

1. A device for distributing power, the device comprising:
a first plurality of charging coils configured to provide wireless power;
a first plurality of switches, each switch of the first plurality of switches paired with one charging coil of the first plurality of charging coils and each switch configured to selectively control power to its respective charging coil;
a second plurality of charging coils configured to provide wireless power;
a second plurality of switches, each switch of the second plurality of switches paired with one charging coil of the second plurality of charging coils and each switch configured to selectively control power to its respective charging coil;
a first control unit configured to control the first plurality of switches; and
a second control unit configured to control the second plurality of switches,
the first and second pluralities of charging coils being interleaved, the first and second control units being further configured to power only one charging coil from each of the first and second pluralities of charging coils, respectively, at a time such that adjacent charging coils are powered from different control units based on one or more control signals from each control unit, and the first plurality of switches being configured to couple the first plurality of charging coils to the control unit and the second plurality of switches being configured to couple the second plurality of charging coils to the control unit.

2. The device of claim 1 , wherein the first and second control units are further configured to couple to a power source via a plurality of power paths, wherein a first power path is coupled to the first plurality of switches via the first control unit and a second power path is coupled to the second plurality of switches via the second control unit.

3. The device of claim 2 , wherein the first and second control units receive current from the power source and distributes the current to the first and second pluralities of switches via the first and second power paths, respectively.

4. The device of claim 1 , further comprising an inverter configured to generate a current and a backbone configured to provide the generated current to the first and second control units.

5. The device of claim 1 , wherein at least one of the first and second pluralities of switches and the first and second control units is further configured to limit a phase of a current flow through a charging coil to be one of zero or 180 degrees.

6. The device of claim 1 , wherein the first and second control units are further configured to receive a control signal from a system controller and activate at least one of the switches of the first or second pluralities of switches, respectively, based on the control signal.

7. The device of claim 1 , wherein the first and second control units are further configured to distribute power to one charging coil via each of the first and second power paths, respectively at the same time.

8. The device of claim 1 , further comprising an enclosure, wherein the first and second pluralities of charging coils, the first and second control units, and the first and second pluralities of switches are enclosed within the enclosure, and wherein the enclosure, the first and second pluralities of charging coils, the first and second control units, and the first and second pluralities of switches form a modular device.

9. A method for distributing power, the method comprising:
selectively coupling one charging coil of a first plurality of charging coils to a first control unit via a first plurality of switches, the charging coils configured to provide wireless power;
selectively coupling one charging coil of a second plurality of charging coils to a second control unit via a second plurality of switches;
generating, via the one charging coil of the first plurality of charging coils a wireless field to distribute power; and
generating, via the one charging coil of the second plurality of charging coils another wireless field to distribute power, the first and second pluralities of charging coils being interleaved and generating the wireless fields via the first and second charging coils via the first and second control units, respectively, at a same time such that adjacent charging coils are powered from different control units based on one or more control signals from each control unit.

10. The method of claim 9 , further comprising:
receiving a control signal from a system controller and selectively coupling one charging coil of the first plurality of charging coils to the first control unit based on the control signal.

11. The method of claim 9 , further comprising:
receiving a current from a power source; and
coupling the current to the first and second pluralities of switches via a first power path and second power path, wherein the first power path couples the power source to the first plurality of switches and the second power path couples the power source to the second plurality of switches.

12. The method of claim 11 , further comprising selectively distributing the current to the first and second pluralities of switches via the first and second power paths.

13. The method of claim 9 , further comprising generating a current via an inverter and providing the current to the first and second control units from the inverter via a backbone.

14. The method of claim 9 , further comprising limiting a phase of a current flow through the charging coils to be one of zero and 180 degrees.

15. The method of claim 9 , further comprising distributing power to the first and second pluralities of switches via the first and second power paths at the same time and distributing power to a single charging coil from each of the first and second pluralities of charging coils at a moment in time.

16. The method of claim 9 , further comprising enclosing, within an enclosure, the first and second pluralities of charging coils, the first and second control units, and the first and second pluralities of switches, wherein the enclosure, the first and second pluralities of charging coils, the first and second control units, and the first and second pluralities of switches form a modular device.

17. A device for distributing power, the device comprising:
a first plurality of means for providing wireless power;
a second plurality of means for providing wireless power;
a first plurality of means for selectively controlling configured to selectively provide power to the first plurality of wireless power providing means;
a second plurality of means for selectively controlling configured to selectively provide power to the second plurality of wireless power providing means;
a first means for controlling the first plurality of selectively controlling means; and
a second means for controlling the second plurality of selectively controlling means, the first and second pluralities of wireless power providing means being interleaved, the first and second controlling means being configured to power only one wireless power providing means from each of the first and second pluralities of wireless power providing means, respectively, at a time such that adjacent wireless power providing means are powered from different controlling means based on one or more control signals from each controlling means, and each of the first plurality of selectively controlling means further configured to respectively couple one of the first plurality of wireless power providing means to the controlling means and each of the second plurality of selectively co

Assignees

• Qualcomm Inc

Inventors

• Keeling Nicholas Athol
• Huang Chang-Yu
• Kissin Michael Le Gallais
• Beaver Jonathan
• Budhia Mickel Bipin
• Camasca Ramirez Claudio Armando

Classifications

• B60L53/122

  Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil · CPC title

• H02J7/62

  against overcurrent · CPC title

• B60L2240/12

  Speed · CPC title

• H02J50/12

  of the resonant type · CPC title

• B60M1/36

  Single contact pieces along the line for power supply · CPC title