Systems and method for positioning freedom, and support of different voltages, protocols, and power levels in a wireless power system

• US 9,106,083 B2
• Filed: 12/10/2012
• Issued: 08/11/2015
• 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): Fantu, Yalkew
• Application Number:
  US13/709,937
• Publication Number:
  US 20130093390A1
• Time in Patent Office: 974 Days
• Field of Search: 320/108, 320/109, 320/139, 320/150, 307/50
• US Class Current: 1/1
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: B60L 53/124 Detection or removal of foreign bodies
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: B60L 58/15 Preventing overcharging
• 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 50/50 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 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/00302 Overcharge protection
• CPC Class Codes: H02J 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/00308 Overvoltage protection
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H02M 1/40 Means for preventing magnetic saturation
• CPC Class Codes: H02M 3/3376 : with automatic control of output voltage or current
• CPC Class Codes: H04B 5/26 : using coils
• CPC Class Codes: H04B 5/266 : One coil at each side, e.g. with primary and secondary coils
• CPC Class Codes: H04B 5/79 : for data transfer in combination with power transfer
• 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 10/72 : Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 : Electric charging stations
• CPC Class Codes: Y02T 90/14 : Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles

Abstract

A system and method for providing positioning freedom, and support of different voltages, protocols, and power levels in a wireless power system. In accordance with an embodiment, the system comprises a base unit having one or more transmitter coils; one or more components including a ferromagnetic, ferrite, or other magnetic material or layer, that modify the magnitude and/or phase of an electromagnetic field in one or multiple dimensions; and one or more components within the base unit and/or the mobile device, for positioning freedom, and support of different voltages, protocols, and power levels. In accordance with various embodiments, the base unit and mobile device can communicate with each other prior to and/or during charging or powering to determine a protocol to be used to charge or power the mobile device.

Claims

1. A system for providing positioning freedom, and support of different voltages, protocols, and power levels in a wireless power system, comprising:

a base unit having one or more transmitter coils, which transmit inductive power to a receiver coil placed close to the one or more transmitter coils and configured to receive power therefrom;

a switching layer having magnetic properties and covering the one or more transmitter coils, so that,

during charging or powering of a mobile device or battery having a receiver and the receiver coil, the switching layer is layered between the one or more transmitter coils and a surface of the base unit, and

wherein, when the mobile device or battery having the receiver coil is placed close to the base unit having the one or more transmitter coils, the switching layer'"'"'s magnetic properties are locally modified, by one or more of a magnetic field of the receiver coil, or by another magnetic component, to guide magnetic flux to provide localized power transfer within a particular region of the switching layer generally aligned with the receiver coil;

a microcontroller within the base unit or the mobile device, for support of different voltages, protocols, and power levels, including determining by the base unit, for the mobile device to be charged or powered, a charging protocol from within a plurality of different charging protocols to be used, and one or more voltage and power level requirements for the mobile device; and

a regulator for regulating, by the mobile device, power received at the receiver coil, including communicating between the receiver and the base unit, using the particular charging protocol, information used by the base unit to make appropriate adjustments to provide a required output voltage, current or power at the receiver output;

wherein multiple mobile devices, batteries or receivers with different voltage or power level requirements can be simultaneously charged or powered by the base unit.

2. The system of claim 1, wherein the base unit and mobile device communicate with each other prior to or during charging or powering to determine a protocol to be used to charge or power the mobile device.

3. The system of claim 1, wherein the base unit and mobile device communicate with each other through a separate coil, radio frequency link, or optical communication, to determine a type of base unit and mobile device.

4. The system of claim 1, wherein the base unit and mobile device communicate with each other to verify the authenticity, power requirements or other characteristics of the mobile device or a battery therein or verify or handshake the presence of the mobile device proximate the base unit.

5. The system of claim 1, wherein the base unit or mobile device 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 mobile device.

6. The system of claim 1, wherein the base unit periodically pings for the presence of a mobile device 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.

7. The system of claim 1, wherein the base unit or mobile device includes a microcontroller that implements in firmware an algorithm for supporting multiple different charging protocols, for use with the mobile device, or to communicate parameters to increase or decrease power or voltage provided to the receiver coil or receiver.

8. The system of claim 1, wherein the switching layer is used to provide a degree of position independence in charging or powering the one or more devices or batteries.

9. The system of claim 1, wherein the modifying the magnitude or phase of the electromagnetic field in one or multiple dimensions includes locally modifying the properties of the switching layer so that it acts as a switching layer, allowing a transmitter coil electromagnetic field to be preferentially transmitted through a locally modified area.

10. The system of claim 1, wherein

the base unit is provided within an automobile, for use in charging or powering one or more mobile devices within the automobile, or

the mobile device is an automobile that can be charged by a base unit.

11. A method of providing positioning freedom, and support of different voltages, protocols, and power levels in a wireless power system, comprising the steps of:

providing a base unit having one or more transmitter coils which transmit inductive power to a receiver coil placed close to the one or more transmitter coils and configured to receive power therefrom;

providing a switching layer having magnetic properties and covering the one or more transmitter coils, so that,

during charging or powering of a mobile device or battery having a receiver and the receiver coil, the switching layer is layered between the one or more transmitter coils and a surface of the base unit, including

wherein, when the mobile device or battery having the receiver coil is placed close to the base unit having the one or more transmitter coils, the switching layer'"'"'s magnetic properties are locally modified, by one or more of a magnetic field of the receiver coil, or by another magnetic component, to guide magnetic flux to provide localized power transfer within a particular region of the switching layer generally aligned with the receiver coil; and

providing a microcontroller within the base unit or the mobile device, for support of different voltages, protocols, and power levels including

determining by the base unit, for the mobile device to be charged or powered, a charging protocol from within a plurality of different charging protocols to be used, and one or more voltage and power level requirements for the mobile device, and

regulating, by the mobile device, power received at the receiver coil, including communicating between the receiver and the base unit, using the particular charging protocol, information used by the base unit to make appropriate adjustments to provide a required output voltage, current or power at the receiver output;

wherein multiple mobile devices, batteries or receivers with different voltage or power level requirements can be simultaneously charged or powered by the base unit.

12. The method of claim 11, wherein the base unit and mobile device communicate with each other prior to or during charging or powering to determine a protocol to be used to charge or power the mobile device.

13. The method of claim 11, wherein the base unit and mobile device communicate with each other through a separate coil, radio frequency link, or optical communication, to determine a type of base unit and mobile device.

14. The method of claim 11, wherein the base unit and mobile device communicate with each other to verify the authenticity, power requirements or other characteristics of the mobile device or a battery therein or verify or handshake the presence of the mobile device proximate the base unit.

15. The method of claim 11, wherein the base unit or mobile device 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 mobile device.

16. The method of claim 11, wherein the base unit periodically pings for the presence of a mobile device 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.

17. The method of claim 11, wherein the base unit or mobile device includes a microcontroller that implements in firmware an algorithm for supporting multiple different charging protocols, for use with the mobile device, or to communicate parameters to increase or decrease power or voltage provided to the receiver coil or receiver.

18. The method of claim 11, wherein the switching layer is used to provide a degree of position independence in charging or powering the one or more devices or batteries.

19. The method of claim 11, wherein the modifying the magnitude or phase of the electromagnetic field in one or multiple dimensions includes locally modifying the properties of the switching layer so that it acts as a switching layer, allowing a transmitter coil electromagnetic field to be preferentially transmitted through a locally modified area.

20. The method of claim 11, wherein

the base unit is provided within an automobile, for use in charging or powering one or more mobile devices within the automobile, or

the mobile device is an automobile that can be charged by a base unit.