MOBILE DEVICE TO CONTROL A CHARGE PAD SYSTEM

• US 20110136550A1
• Filed: 07/30/2009
• Published: 06/09/2011
• Est. Priority Date: 08/18/2008
• Status: Active Grant

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: Maugars, Philippe
• Granted Patent: US 9,627,913 B2
• Time in Patent Office: Days
• US Class Current: 455/573
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• 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 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A method of charging a mobile device on a charge pad. The method includes receiving a wireless charge from at least one of a plurality of charge pad power coils. The method also includes enabling communications between the charge pad and the mobile device. The method also includes sending a command from the wireless device to the charge pad to adjust a characteristic of the wireless charge at the charge pad and to enable the wireless device to control the characteristic of the wireless charge of the charge pad.

Claims

1. A mobile device for communication with a charge pad, the mobile device comprising:

a battery to power the mobile device;

a power coil coupled to the battery, the power coil to receive a wireless charge from at least one of a plurality of charge pad power coils;

a communication device for enabling communications with the charge pad to send a command from the mobile device to the charge pad to adjust a characteristic of the wireless charge based on the command from the mobile device; and

a processor coupled to the means for enabling communications with the charge pad, wherein the processor is operable to actively monitor the wireless charge of the mobile device in conjunction with a current state of the mobile device under charge, to analyze the characteristic of the wireless charge in conjunction with a testing sequence of the charge pad, and to direct the communication device to send the command to the charge pad, wherein the command is based on the active monitoring and the analysis of the characteristic of the wireless charge,

wherein the communication device is further configured to initiate the testing sequence to test a plurity of charge rates and to perform a selection of one of the plurality of charge rates for the wireless charge, wherein the characteristic of the wireless charge comprises the selection of the one of the plurality of charge rates.

3. The mobile device of claim 1, wherein the communication device is further configured to initiate the testing sequence to test a sequence of the plurality of charge pad power coils and to perform a selection of the at least one of the plurality of charge pad power coils to emit the wireless charge, wherein the characteristic of the wireless charge comprises the selection of the at least one of the plurality of charge pad power coils.

5. The mobile device of claim 1, wherein the communication device is further configured to initiate the testing sequence to test a plurality of amperage levels and to perform a selection of one of the plurality of amperage levels for the wireless charge, wherein the characteristic of the wireless charge comprises the selection of the one of the plurality of amperage levels.

6. The mobile device of claim 1, wherein the communication device is further configured to initiate the testing sequence to test a plurality of voltage levels and to perform a selection of one of the plurality of voltage levels for the wireless charge, wherein the characteristic of the wireless charge comprises the selection of the one of the plurality of voltage levels.

7. The mobile device of claim 1, wherein the communication device is further configured to query the battery to detect a current battery level and to send the command to the charge pad to adjust the characteristic of the wireless charge according to the current battery level.

8. The mobile device of claim 1, further comprising a temperature sensor coupled to the communication device, wherein the communication device is further configured to query the temperature sensor to detect a current system temperature and to send the command to the charge pad to adjust the characteristic of the wireless charge according to the current system temperature.

9. The mobile device of claim 1, wherein the communication device comprises a radio-frequency (RF) identification (ID) device, wherein the communication device is further configured to send RFID data to the charge pad during the communications between the mobile device and the charge pad, the communications to allow the charge pad to perform a device check of the mobile device, wherein the RFID data comprises at least one device parameter of a plurality of device parameters comprising a minimum charge rate, a maximum charge rate, a battery level threshold, a temperature threshold, a device manufacturer ID, and a device model ID.

10. The mobile device of claim 1, wherein the communication device further comprises a near field communication (NFC) circuit, wherein the communication device is further configured to send identification (ID) data to the charge pad in response to a request for the ID data from the charge pad, the ID data to allow the charge pad to perform a device check of the mobile device and to receive a compliance parameter from the charge pad in response to a request for the compliance parameter from the mobile device, the compliance parameter to allow the mobile device to perform a compliance check of the charge pad, the compliance parameter comprises at least one charge pad parameter of a plurality of charge pad parameters comprising a charge pad manufacturer ID, a charge pad model ID, a list of supported charge rates, a list of supported voltage levels, and a list of supported amperage levels, wherein the device check comprises a first authentication of the mobile device to the charge pad and the compliance check comprises a second authentication of the charge pad to the mobile device.

2. (canceled)

4. (canceled)

11. A method of wirelessly charging a mobile device, the method comprising:

receiving a wireless charge from at least one of a plurality of charge pad power coils to charge a battery of the mobile device;

enabling communications between the charge pad and the mobile device; and

actively monitoring the wireless charge of the mobile device in conjunction with a current state of the mobile device under charge,

analyzing a characteristic of the wireless charge in conjunction with a testing sequence of the charge pad, wherein the testing sequence comprises testing a plurality of charge rates associated with the wireless charge, and wherein the characteristic of the wireless charge comprises a selection of one of the plurality of charge rates;

determining which of the plurality of charge rates to implement in the wireless charge of the power coil; and

sending a command from the wireless device to the charge pad to adjust the characteristic of the wireless charge based on the analysis of the characteristic of the wireless charge at the charge pad and to enable the wireless device to control the characteristic of the wireless charge of the charge pad.

13. The method of claim 11, the method further comprising:

testing a sequence of the plurality of charge pad power coils, wherein the characteristic of the wireless charge comprises a selection of at least one of the plurality of charge pad power coils; and

determining which of the at least one of the plurality of charge pad power coils to implement in the wireless charge of the power coil.

15. The method of claim 11, the method further comprising:

querying the battery to detect a current battery level of the wireless device; and

sending the command to the charge pad to adjust the characteristic of the wireless charge according to the current battery level.

16. The method of claim 11, the method further comprising:

querying a temperature sensor to detect a current system temperature of the wireless device; and

sending the command to the charge pad to adjust the characteristic of the wireless charge according to the current system temperature.

12. (canceled)

14. (canceled)

17. (canceled)

18. (canceled)

19. (canceled)

20. (canceled)

21. (canceled)