Chargers and methods for wireless power transfer

• US 9,356,659 B2
• Filed: 03/14/2013
• Issued: 05/31/2016
• Est. Priority Date: 01/18/2011
• Status: Active Grant

• Current Assignee: Mojo Mobility, Inc.
• Original Assignee: Mojo Mobility, Inc.
• Inventors: Partovi, Afshin
• Primary Examiner(s): Williams, Arun
• Application Number:
  US13/828,933
• Publication Number:
  US 20130249479A1
• Time in Patent Office: 1,174 Days
• Field of Search: 320/108
• US Class Current: 1/1
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/50 using additional energy repeaters between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• 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 7/0042 characterised by the mechanical construction
• CPC Class Codes: H04B 5/263 Multiple coils at either side
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

Systems and methods for enabling efficient wireless power transfer, and charging of devices and batteries, in a manner that allows freedom of placement of the devices or batteries in one or multiple (e.g., one, two or three) dimensions. In accordance with various embodiments, applications include inductive or magnetic charging and power, and wireless powering or charging of, e.g., mobile, electronic, electric, lighting, batteries, power tools, kitchen, military, medical or dental, industrial applications, vehicles, trains, or other devices or products. In accordance with various embodiments, the systems and methods can also be generally applied, e.g., to power supplies or other power sources or charging systems, such as systems for transfer of wireless power to a mobile, electronic or electric device, vehicle, or other product.

Claims

1. A wireless power charger, comprising:

a base unit having one or more transmitter coils; and

one or more components including a magnetic material or layer, that modify the magnitude and/or phase of an electromagnetic field and/or corresponding magnetic flux in one or multiple dimensions and/or to guide the magnetic flux in such a manner as to create a preferential path for flux flow, the preferential path having a geometry that provides for low flux leakage and that exhibits low reluctance for return magnetic flux,

wherein, when one or more vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries, each having one or more receiver coils or receivers associated therewith, is placed in proximity to the base unit, one or more of the transmitter coils are used to inductively generate a current in the receiver coil or receiver associated with the vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries to charge or power the vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries.

2. The wireless power charger of claim 1, wherein the base unit and the one or more vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries, communicate with each other prior to and/or during charging or powering to determine a protocol to be used to charge or power the vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries.

3. The wireless power charger of claim 1, wherein the base unit and the one or more vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries communicate with each other through a separate coil, radio frequency link, or optical communication, to determine a type of base unit and vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries.

4. The wireless power charger of claim 1, wherein the base unit and the one or more vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries communicate with each other to verify the authenticity, power requirements and/or other characteristics of the vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries, and/or verify or handshake the presence of the vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries proximate the base unit.

5. The wireless power charger of claim 1, wherein the base unit determines the presence of vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries, in proximity to the base unit, and wherein one or more receiver coil or receiver thereby activated performs an initiation process whereby its ID, presence, power, voltage or other requirements are communicated to the base unit, including different power, voltage or other requirements for different vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries.

6. The wireless power charger of claim 1, wherein the base unit and/or the one or more vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries includes a microcontroller that makes appropriate adjustments to achieve a desired output voltage, current or power, to be used using in charging or powering the vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries.

7. The wireless power charger of claim 1, wherein the base unit periodically pings for the presence of a vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries in proximity to the base unit, and wherein a receiver coil or receiver thereby activated performs an initiation process whereby its ID, presence, power, voltage or other requirements are communicated to the base unit.

8. The wireless power charger of claim 1, wherein the base unit and/or the one or more vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries performs a method for supporting multiple different charging protocols, for use with the vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries, and/or to communicate parameters to increase or decrease power or voltage provided to the receiver coil or receiver associated with the vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries.

9. The wireless power charger of claim 1, wherein the base unit can charge or power a plurality of vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries simultaneously, including use of different charging protocols.

10. The wireless power charger of claim 1, wherein the instruction set, software or firmware for operation of the charger and/or receivers or incorporated therein to improve or modify wireless charging capabilities and function or to add further user functionality can be updated locally or remotely by a user or automatically.

11. The wireless power charger of claim 1, wherein the wireless charger and/or receivers are configured as a multi-protocol system for use with different communication and/or control protocols, or different means of communication.

13. The charger of claim 1, wherein the geometry of the preferential path is a Magnetic Aperture geometry.

14. The charger of claim 1, wherein the geometry of the preferential path is a Magnetic Resonance geometry.

15. The charger of claim 1, wherein the geometry of the preferential path is a Magnetic Coupling geometry.

12. A method for use with a multi-dimensional wireless power charger, comprising:

providing a base unit having one or more transmitter coils, and one or more magnetic material or layers, that modify the magnitude and/or phase of an electromagnetic field and/or corresponding magnetic flux in one or multiple dimensions and/or to guide the magnetic flux in such a manner as to create a preferential path for flux flow, the preferential path having a geometry that provides for low flux leakage and that exhibits low reluctance for return magnetic flux; and

using the base unit to charge or power one or more vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries,

wherein, when one or more vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries, each having one or more receiver coils or receivers associated therewith, is placed in proximity to the base unit, one or more of the transmitter coils are used to inductively generate currents in the receiver coils or receivers associated with the vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries, to charge or power the vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries.

16. The method of claim 12, wherein the geometry of the preferential path is a Magnetic Aperture geometry.

17. The method of claim 12, wherein the geometry of the preferential path is a Magnetic Resonance geometry.

18. The method of claim 12, wherein the geometry of the preferential path is a Magnetic Coupling geometry.