Inductive charging with support for multiple charging protocols

• US 8,896,264 B2
• Filed: 12/07/2012
• Issued: 11/25/2014
• Est. Priority Date: 06/11/2010
• Status: Active Grant

• Current Assignee: Mojo Mobility, Inc.
• Original Assignee: Mojo Mobility, Inc.
• Inventors: Partovi, Afshin
• Primary Examiner(s): Berhanu, Samuel
• Assistant Examiner(s): Robbins, Jerry D
• APPLICATION: US 20130099735A1
• Time in patent office: 718 Days
• Field of Search: 320/108
• US Class Current: 320/108
• CPC Class Codes: H01F 7/0247 Orientating, locating, transporting arrangements
• CPC Class Codes: H01F 7/0252 PM holding devices H01F7/021, H01F7/0215, H01F7/0226 take precedence
• CPC Class Codes: H02J 5/005 with inductive power transfer for charging H02J7/025
• 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 50/70 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence
• CPC Class Codes: H02J 7/025 using non-contact coupling, e.g. inductive, capacitive

Abstract

A system and method for inductive charging with support for multiple charging protocols. In accordance with an embodiment, the system comprises a base unit having one or more charger coils, for use in inductive charging; and one or more components within the base unit and/or a mobile device for supporting multiple different charging protocols, for use with the mobile device. When a mobile device having one or more receiver coils or receivers associated with, is placed in proximity to the base unit, the system determines a charging protocol for use with the charger coil to inductively generate a current in the receiver coil or receiver associated with the mobile device, to charge or power the mobile device.

Claims

1. A system for inductive charging with support for multiple charging protocols, comprising:

a base unit having one or more charger coils, for use in inductive charging;

one or more components within one or both of the base unit or a mobile device for supporting different charging protocols, for use by the base unit to control charging of the mobile device; and

wherein, when a mobile device having one or more receiver coils and receivers associated with, is placed in proximity to the base unit, the system determines and selects a particular charging protocol from within a plurality of different charging protocols, wherein different charger types and different mobile device types can be associated with different charging protocols, for use with the one or more charger coils, including that

the base unit periodically activates the one or more charger coils;

the mobile device

detects the activation of the one or more charger coils and uses such information to determine a charger type, and

performs an initiation process whereby one or more of a mobile device presence, receiver identifier, power or voltage requirement, temperature, or state of charge is communicated to the base unit; and

the base unit and the mobile device exchange information to select from within the different charging protocols, the particular charging protocol to be used to inductively generate a current in the receiver coil or receiver associated with the mobile device, to charge or power the mobile device, including communicating between the charger and the receiver, using the particular charging protocol, information used by the base unit to make appropriate adjustments to its charger coil drive circuitry to achieve a desired voltage, current or power at the receiver output.

2. The system of claim 1, wherein the base unit and mobile device 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.

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 and/or other characteristics of the mobile device or a battery therein and/or verify or handshake the presence of the mobile device proximate the base unit.

5. The system of claim 1, wherein the base unit and/or mobile device includes a microcontroller that makes appropriate adjustments to achieve a desired output voltage, current or power, to be used in charging or powering the mobile device.

6. The system of claim 1, wherein the base unit and/or mobile device includes a microcontroller that receives a communication signal from a detection/demodulation circuit and, depending on an algorithm used, makes appropriate adjustments to the output voltage, current or power of the base unit.

7. The system of claim 1, wherein the base unit and/or mobile device includes a microcontroller that implements in firmware an algorithm for supporting multiple different charging protocols, for use with the mobile device, and/or measures voltages and currents, flags, and temperatures at appropriate locations for proper operation.

8. The system of claim 1, wherein, upon detection of a particular event, the base unit and/or mobile device can perform an action including one of notifying a user, or controlling the charging or powering of the mobile device or another action.

9. The system of claim 1, wherein the base unit and/or mobile device includes a battery charging circuitry and algorithm for use with different types of batteries and mobile devices, to optimally control the charging or powering of those different types of batteries and mobile devices.

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, and/or

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

11. A method of inductive charging with support for multiple charging protocols, comprising the steps of:

providing a base unit having one or more charger coils, for use in inductive charging;

providing one or more components within one or both of the base unit or a mobile device for supporting different charging protocols, for use by the base unit in charging the mobile device; and

wherein, when a mobile device having one or more receiver coils and receivers associated with, is placed in proximity to the base unit, the system determines a particular charging protocol from within a plurality of different charging protocols, wherein different charger types and different mobile device types can be associated with different charging protocols, for use with the one or more charger coils, including that

the base unit periodically activates the one or more charger coils;

the mobile device

detects the activation of the one or more charger coils and uses such information to determine a charger type, and

performs an initiation process whereby one or more of a mobile device presence, receiver identifier, power or voltage requirement, temperature, or state of charge is communicated to the base unit; and

the base unit and the mobile device exchange information to select from within the different charging protocols, the particular charging protocol to be used to inductively generate a current in the receiver coil or receiver associated with the mobile device, to charge or power the mobile device, including communicating between the charger and the receiver, using the particular charging protocol, information used by the base unit to make appropriate adjustments to its charger coil drive circuitry to achieve a desired voltage, current or power at the receiver output.

12. The method of claim 11, wherein the base unit and mobile device 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.

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 and/or other characteristics of the mobile device or a battery therein and/or verify or handshake the presence of the mobile device proximate the base unit.

15. The method of claim 11, wherein the base unit and/or mobile device includes a microcontroller that makes appropriate adjustments to achieve a desired output voltage, current or power, to be used in charging or powering the mobile device.

16. The method of claim 11, wherein the base unit and/or mobile device includes a microcontroller that receives a communication signal from a detection/demodulation circuit and, depending on an algorithm used, makes appropriate adjustments to the output voltage, current or power of the base unit.

17. The method of claim 11, wherein the base unit and/or mobile device includes a microcontroller that implements in firmware an algorithm for supporting multiple different charging protocols, for use with the mobile device, and/or measures voltages and currents, flags, and temperatures at appropriate locations for proper operation.

18. The method of claim 11, wherein, upon detection of a particular event, the base unit and/or mobile device can perform an action including one of notifying a user, or controlling the charging or powering of the mobile device or another action.

19. The method of claim 11, wherein the base unit and/or mobile device includes a battery charging circuitry and algorithm for use with different types of batteries and mobile devices, to optimally control the charging or powering of those different types of batteries and mobile devices.

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, and/or

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