System and method for powering or charging receivers or devices having small surface areas or volumes

• US 9,837,846 B2
• Filed: 04/14/2014
• Issued: 12/05/2017
• Est. Priority Date: 04/12/2013
• Status: Active Grant

• Current Assignee: Mojo Mobility, Inc.
• Original Assignee: Mojo Mobility, Inc.
• Inventors: Partovi, Afshin
• Primary Examiner(s): Aisaka, Bryce
• Application Number:
  US14/252,627
• Publication Number:
  US 20140306654A1
• Time in Patent Office: 1,331 Days
• Field of Search: 320108
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/00308 Overvoltage protection
• CPC Class Codes: H02J 7/00309 Overheat or overtemperature protection
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

Systems and methods for enabling transfer of power, from a wireless charger or power supply, to one or more receivers placed on or near the wireless charger or power supply, including powering or charging one or multiple receivers or devices having small surface areas or volumes. In accordance with an embodiment, a receiver coil can be generally shaped as a blade or thin solenoid, which receives power inductively, which is then used to power or charge one or more electronic devices. Applications include inductive or magnetic charging and power, and particularly usage in mobile, electronic, electric, lighting, or other devices, batteries, power tools, kitchen, industrial, medical or dental, or military applications, vehicles, robots, trains, and other usages.

Claims

1. A system for powering or charging one or multiple receivers or devices having small surface areas or volumes, comprising:

a receiver coil of a blade or thin solenoid shape/geometry that includes a larger surface in a first dimension and a smaller surface in a second and/or third dimension, which receives power inductively from a charger, which is then used to power or charge one or more electronic devices,

wherein the charger is a source of alternating current effective to charge the one or multiple receivers or devices having small surface areas or volumes, and

further wherein the receiver coil has the smaller surface facing a charging surface of the charger.

2. The system of claim 1, wherein the charger includes a charger coil atop a magnetic flux guide or shielding material or layer that extends beyond the edges of the charger coil.

3. The system of claim 1, wherein additional magnetic or ferrite material or layers are added to or otherwise integrated with the top and/or bottom of the receiver coil, to aid in the guidance of flux generated in the receiver coil.

4. The system of claim 1, wherein the receiver coil includes a flux guide material such as ferrite with permeability greater than 1, with an axis perpendicular to or at an angle sufficient to receive a substantially perpendicular flux from the charger, the axis being perpendicular to a tangent plane associated with the surface of the charger.

5. The system of claim 1 wherein the one or more electronic devices is one of a portable mobile phone, music player, wearable computer such as a display device, communication device, watch, electronic glasses, or other mobile or electrical or electric device or vehicle.

6. The system of claim 1, wherein the system includes a charger having at least two separate coil structures provided on top of a magnetic layer to provide two or more different sections with different operating principles or protocols or driving and/or communication sections, for use in powering or charging the electronic devices.

7. The system of claim 6, wherein the operating frequency of each coil is defined by its inductance and associated resonant capacitor, so that the two or more coil structures operate either in similar, different, frequency ranges to power associated receivers.

8. The system of claim 1, wherein the charger is included within an automobile or other vehicle.

9. The system of claim 1, wherein the charger and/or the receiver can be configured to detect the orientation or front-back placement of the device during charging and perform additional contextually-aware functions.

10. The system of claim 1, wherein the charger and the device to be powered or charged communicate to determine optimum powering or charging.

11. A method for powering or charging one or multiple receivers or devices having small surface areas or volumes, comprising:

providing a receiver coil of a blade or thin solenoid shape/geometry that includes a larger surface in a first dimension and a smaller surface in a second and/or third dimension, which receives power inductively from a charger, which is then used to power or charge one or more electronic devices,

wherein the charger is a source of alternating current effective to charge the one or multiple receivers or devices having small surface areas or volumes, and

further wherein the receiver coil has the smaller surface facing a charging surface of the charger.

12. The method of claim 11, wherein the charger includes a charger coil atop a magnetic flux guide or shielding material or layer that extends beyond the edges of the charger coil.

13. The method of claim 11, wherein additional magnetic or ferrite material or layers are added to or otherwise integrated with the top and/or bottom of the receiver coil, to aid in the guidance of flux generated in the receiver coil.

14. The method of claim 11, wherein the receiver coil includes a flux guide material such as ferrite with permeability greater than 1, with an axis perpendicular to or at an angle sufficient to receive a substantially perpendicular flux from the charger, and the axis is perpendicular to a tangent plane associated with the surface of the charger.

15. The method of claim 11 wherein the one or more electronic devices is one of a portable mobile phone, music player, wearable computer such as display device, communication device, watch, electronic glasses, or other mobile or electrical or electric device or vehicle.

16. The method of claim 11, wherein the system includes a charger having at least two separate coil structures provided on top of a magnetic layer to provide two or more different sections with different operating principles or protocols or driving and/or communication sections, for use in powering or charging the electronic devices.

17. The method of claim 16, wherein the operating frequency of each coil is defined by its inductance and associated resonant capacitor, so that the two or more coil structures operate either in similar, different, frequency ranges to power associated receivers.

18. The method of claim 11, wherein the charger is included within an automobile or other vehicle.

19. The method of claim 11, wherein the charger and/or the receiver can be configured to detect the orientation or front-back placement of the device during charging and perform additional contextually-aware functions.