WIRELESS POWER RECEIVER MODULE

• US 20090236140A1
• Filed: 10/14/2008
• Published: 09/24/2009
• Est. Priority Date: 10/12/2007
• Status: Abandoned Application

• Current Assignee: WildCharge, Inc. (Pure Energy Visions Corporation)
• Original Assignee: WildCharge, Inc. (Pure Energy Visions Corporation)
• Inventors: Randall, Mitch
• Application Number:
  US12/251,428
• Publication Number:
  US 20090236140A1
• Time in Patent Office: Days
• US Class Current: 174/268
• CPC Class Codes: H01R 13/03 characterised by the material, e.g. plating, or coating materials
• CPC Class Codes: H01R 13/2421 using coil springs
• CPC Class Codes: H01R 13/6205 Two-part coupling devices held in engagement by a magnet
• CPC Class Codes: H01R 13/6675 with built-in power supply
• CPC Class Codes: H01R 13/70 with built-in switch
• CPC Class Codes: H01R 31/06 Intermediate parts for linking two coupling parts, e.g. adapter with a holder adapted for supporting apparatus to which its counterpart is attached H01R33/94

Abstract

A charging system comprises a power pad and compatible circuitry on devices to be charged, including contacts in a constellation pattern that interface with conductive strips on the pad to ensure power transfer regardless of orientation. Safety and control circuitry provide spark suppression and short protection.

Claims

1. A wireless power delivery system comprising a set of flat electrodes constituting a surface, said electrodes powered by a control unit and when operating, generating a predetermined voltage potential.

2. The wireless power delivery system of claim 1 wherein receiver devices rest upon the surface to receive wireless power.

3. Receiver devices of claim 2 wherein each receiver device contains electronics to convert the standard output of the power delivery system to accommodate the requirements of the target device the receiver device is powering.

4. The wireless power delivery system of claim 1 wherein a system controller monitors and delivers power to said surface electrodes, said system controller having several modalities of operation to provide functionality to said wireless power delivery system.

5. The system controller of claim 4 wherein a spark suppression circuit prevents a spark if a short is suddenly presented across the pad during operation.

6. The spark suppression circuit of claim 5 employing low output capacitance.

7. The spark suppression circuit of claim 5 employing current limiting.

8. The spark suppression circuit of claim 5 employing rapid shutdown.

9. The wireless power delivery system of claim 1 wherein the design is sought to provide universal compatibility among a wide range of target devices.

10. The wireless power delivery system of claim 9 wherein a standard geometry is employed to provide for universal compatibility.

11. The wireless power delivery system of claim 1 wherein a power management scheme is implemented.

12. The power management scheme of claim 11 wherein voltage discrimination is used.

13. The power management scheme of claim 11 wherein digital power management communication is used.

14. The voltage discrimination scheme of claim 12 wherein predetermined voltage ranges are defined to indicate predetermined power output capabilities, said capabilities thereby detectable by target devices by the measurement of said predetermined voltage present on said wireless power delivery surface.

15. The receiver device of claim 2 wherein the electrical contact to the surface is provided by contact balls.

16. The receiver device of claim 15 wherein the contact balls make electrical connection with the receiver device electronics through a coil spring with a conical taper.

17. The receiver device of claim 15 wherein the conical taper coil springs make electrical contact with pads on the printed circuit forming the receiver device.

18. The receiver of claim 2 wherein magnets are used to increase the force exerted by the contact points to the surface electrodes of the power delivery surface.

19. The receiver of claim 2 wherein a diode rectifier is used to rectify the output from the plurality of contact points.

20. The diode rectifier of claim 19 wherein a resister and capacitor are used to present the required detectable response characteristics to the system controller such that the system controller can detect its presence yet distinguish it from all other impedances.

21. The rectifier of claim 19 wherein an auxiliary rectifier provides the necessary impedance response for the system controller to detect.

22. The receiver of claim 2 wherein the power conditioning electronics provides a turn-on delay.

23. An active rectifier comprising a MOSFET and a controller.

24. The controller of claim 23 comprising an amplifier with an asymmetric element.

25. The controller of claim 24 providing a gate drive to the MOSFET such that the MOSFET mimics the operation of an active diode.

35. The current limiter of claim 24 wherein a differential amplifier, a sensing resistor and a diode feed a current sense signal back into the summing junction of a regulator device.

26. A squelching power supply.

27. The squelching power supply of claim 26 wherein the output drives the controller of an active diode.

28. A system of active diodes and a squelching power supply forming an active bridge rectifier, said rectifier having the characteristic that at low input voltages rectification is performed by the intrinsic diodes of the MOSFET'"'"'s and that at high voltages rectification is performed by the active diodes.

29. A module comprising a set of contacts compatible with the geometry of surface electrodes on a power delivery surface, a rectifier, and a power conditioning unit.

30. The module of claim 29 packaged in a housing that can be insert molded into a variety of materials.

31. The module of claim 29 comprising a circuit for power conditioning.

32. The circuit for power conditioning of claim 31 wherein an impedance recognizable by a system controller is included.

33. The circuit for power conditioning of claim 31 wherein a startup delay circuit is included.

34. The circuit for power conditioning of claim 31 wherein a current limiter is included.

36. The module of claim 29 wherein a ZIF socket is used to connect the power output to a flat, flexible conductor.

37. A mass producible power delivery surface.

38. The power delivery surface of claim 37 wherein a plastic base accepts stamped metal electrode strips.

39. The power delivery surface of claim 38 wherein leaf springs are used to connect the metal electrode strips to a printed circuit board.

40. The power delivery surface of claim 39 wherein a printed circuit board seats in a predefined orientation on the plastic base.

41. The power delivery surface of claim 40 wherein a cover encloses said printed circuit board, printed circuit board then making contact with said leaf springs.