CONTACTLESS CHARGING DEVICE, CHARGING METHOD, CHARGEABLE BATTERY, AND CHARGER

• US 20120104993A1
• Filed: 12/24/2011
• Published: 05/03/2012
• Est. Priority Date: 09/01/2009
• Status: Abandoned Application

• Current Assignee: Vimicro Corporation
• Original Assignee: Vimicro Corporation
• Inventors: HUANG, Bin
• Application Number:
  US13/337,056
• Publication Number:
  US 20120104993A1
• Time in Patent Office: Days
• US Class Current: 320/106
• CPC Class Codes: H02J 50/12 of the resonant type
• 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

Abstract

Techniques for a contactless charging device, a charging method thereof, a chargeable battery, and a charger are described. The contactless charging device includes a chargeable battery and a charger. The chargeable battery includes a secondary charging circuit configured for receiving power from the primary charging circuit and a contactless IC card configured for storing the battery characteristic information of the chargeable battery. The charger includes a contactless card reading circuit configured for reading battery characteristic information of the chargeable battery and transmitting the battery characteristic information to a charging control IC during charging, a primary charging circuit configured for transmitting power to the chargeable battery; and a charging control IC configured for controlling the primary charging circuit to supply power to the primary charging circuit according to the battery characteristic information.

Claims

1. A contactless charging device including a chargeable battery and a charger, characterized in that:

the charger comprising;

a contactless card reading circuit configured for reading battery characteristic information of the chargeable battery and transmitting the battery characteristic information to a charging control IC during charging;

a primary charging circuit configured for transmitting power to the chargeable battery; and

a charging control IC configured for controlling the primary charging circuit to supply power to the primary charging circuit according to the battery characteristic information;

the chargeable battery comprising;

a secondary charging circuit configured for receiving power from the primary charging circuit; and

a contactless IC card configured for storing the battery characteristic information of the chargeable battery.

2. The charging device as claimed in claim 1, characterized in that, the charging control IC includes a power supply module configured for supplying power to the primary charging circuit.

3. The charging device as claimed in claim 2, characterized in that, the charger further includes a safety control circuit connected to the charging control IC and configured for real-time measuring temperature of the chargeable battery, sending out a closing signal to close the power supply module when the temperature of the chargeable battery exceed a predetermined temperature, and sending out an opening signal to open the power supply module when the temperature of the chargeable battery is lower than the predetermined temperature;

the charging control IC further including;

a charging termination module configured to close the power supply module according to the closing signal; and

a charging restarting module configured to open the power supply module according to the opening signal.

4. The charging device as claimed in claim 2, characterized in that, the battery characteristic information includes charging curve information and secondary charging circuit information;

the charging control IC further including a register that is configured for storing characteristic information of the charge;

the characteristic information of the charge including a primary charging circuit information;

the power supply module being configured to supply power to the primary charging circuit based on the charging curve, the primary charging circuit information, and the secondary charging circuit information.

5. The charging device as claimed in claim 2, characterized in that, the battery characteristic information includes authentication information;

the charging control IC further including an information validation module configured for validating the authentication information and triggering the power supply module after the authentication information is validated.

6. The charging device as claimed in claim 1, characterized in that, the charger further includes an effective charging range test module configured for verifying whether the chargeable battery is disposed in an effective charging range of the charger;

the effective charging range being determined according to the output power of the contactless card reading circuit.

7. The charging device as claimed in claim 1, characterized in that, the secondary charging circuit includes a secondary coil, an isolation diode, and an electric cell, which are serially connected in order;

the primary charging circuit including a primary coil whose two ends are connected to the charging control IC;

the secondary coil receiving power transmitted from the primary coil and transmitting the power to the electric cell via isolation diode.

16. The charging method using the charging device as claimed in claim 1, characterized in that, comprising:

placing the chargeable battery in an effective charging range defined by the charger;

reading the battery characteristic information by the charger;

transmitting power to the chargeable battery according to the battery characteristic information by the charger;

receiving the power by the chargeable battery.

17. The method as claimed in claim 16, characterized in that, further comprising:

real-time detecting temperature of the chargeable battery and sending out a charging terminating signal by the charger when the temperature of the chargeable battery exceeds a predetermined temperature; and

stopping power transmission to the chargeable battery by the charger according to the charging terminating signal.

18. The method as claimed in claim 17, characterized in that, further comprising:

detecting the temperature of the chargeable battery in real time and sending out a charging restarting signal by the charger when the temperature of the chargeable battery turns lower than the predetermined temperature;

restarting the power transmission to the chargeable battery by the charger according to the charging restarting signal.

19. The method as claimed in claim 16, characterized in that, before the power transmission, further comprising:

verifying the battery characteristic information by the charger;

proceeding to the power transmission if the verification is success, or the charging of the chargeable battery is rejected.

8. a chargeable battery, characterized in that, comprising:

a contactless IC card configured for storing the battery characteristic information of the chargeable battery; and

a secondary charging circuit configured for receiving power transmitted by a charger according to the battery characteristic information.

9. The chargeable battery as claimed in claim 8, characterized in that, the secondary charging circuit includes a secondary coil, an isolation diode, and an electric cell, which are serially connected in order;

the secondary coil transmitting power received to the electric cell via isolation diode.

10. The chargeable battery as claimed in claim 8, characterized in that, the battery characteristic information includes charging curve information, secondary charging circuit information, and authentication information.

11. a charger, characterized in that, comprising:

a contactless card reading circuit reading battery characteristic information of a chargeable battery;

a charging control IC controlling the charger to supply power to the chargeable battery according to the battery characteristic information; and

a primary charging circuit configured for transmitting power to the chargeable battery.

12. The charger as claimed in claim 11, characterized in that, the charging control IC includes a power supply module configured for supplying power to the primary charging circuit.

13. The charger as claimed in claim 11, characterized in that, further comprising a safety control circuit configured for detecting temperature of the chargeable battery, sending out a closing signal to close the power supply module when the temperature of the chargeable battery exceed a predetermined temperature, and sending out an opening signal to open the power supply module when the temperature of the chargeable battery is lower than the predetermined temperature;

the charging control IC further including;

a charging termination module configured to close the power supply module according to the closing signal; and

a charging restarting module configured to open the power supply module according to the opening signal.

14. The charger as claimed in claim 11, characterized in that, the charging control IC further including a register that is configured for storing characteristic information of the charge;

the characteristic information of the charge including a primary charging circuit information.

15. The charger as claimed in claim 11, characterized in that, further comprising an effective charging range test module configured for verifying whether the chargeable battery is disposed in an effective charging range of the charger;

the effective charging range being determined according to the output power of the contactless card reading circuit.