WIRELESS CHARGER AND CHARGING METHOD USING SAME

• US 20150130408A1
• Filed: 09/09/2014
• Published: 05/14/2015
• Est. Priority Date: 11/13/2013
• Status: Active Grant

• Current Assignee: Chiun Mai Communication Systems, Inc. (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Chiun Mai Communication Systems, Inc. (Hon Hai Precision Industry Co., Ltd.)
• Inventors: WEI, PO-SUN
• Granted Patent: US 9,548,624 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• 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: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 7/00712 the cycle being controlled or terminated in response to electric parameters
• CPC Class Codes: Y02B 40/00 Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Abstract

A charger for wirelessly charging an electronic device by electromagnetic induction includes a coil assembly and a control unit. The control unit includes an identification module, a detection module, a comparing module, and an allocating module. The identification module identifies the electronic device. The detection module detects power rating and required electric power of the electronic device. The comparing module compares residual electric power of the wireless charger with the required electric power of the electronic device. The allocating module selects a portion of the residual electric power of the wireless charger. The coil assembly converts the portion of the residual electric power of the wireless charger into electromagnetic waves, and directs the electromagnetic waves to the electronic device.

Claims

1. A wireless charger for charging an electronic device using wireless charging technologies, the wireless charger comprising:

a coil assembly; and

a control unit coupled to the coil assembly, the control unit comprising;

an identification module for identifying the electronic device;

a detection module for detecting required electric power of the electronic device;

a comparing module for determining whether residual electric power of the wireless charger is greater than the required electric power of the electronic device; and

an allocating module directed by a determination of the comparing module, and for selecting a portion of the residual electric power of the wireless charger for charging the electronic device;

wherein the coil assembly converts the portion of the residual electric power of the wireless charger into electromagnetic waves, and directs the electromagnetic waves to the electronic device for charging the electronic device.

2. The wireless charger as claimed in claim 1, wherein the coil assembly transmits control signals output from the control unit to the electronic device via electromagnetic induction, and receives feedback signals from the electronic device.

3. The wireless charger as claimed in claim 2, wherein the identification module sends an acknowledgement (ACK) command to the electronic device, and obtains an identification (ID) number of the electronic device.

4. The wireless charger as claimed in claim 3, wherein the identification module identifies the electronic device according to the ID number.

5. The wireless charger as claimed in claim 1, wherein if the residual electric power of the wireless charger is greater than the required electric power of the electronic device, the comparing module sends a first control command to the allocating module, the allocating module selects a first proportion of the residual electric power of the wireless charger to charge the electronic device.

6. The wireless charger as claimed in claim 1, wherein if the residual electric power of the wireless charger is equal to or less than the required electric power of the electronic device, the allocating module determines that the wireless charger does not charge the electronic device, or selects a second proportion of the residual electric power of the wireless charger to charge the electronic device.

7. A method for charging an electronic device using a wireless charger, the method comprising:

identifying the electronic device;

detecting required electric power of the electronic device;

determining whether residual electric power of the wireless charger is greater than the required electric power of the electronic device;

selecting a portion of the residual electric power of the wireless charger;

converting the portion of the residual electric power of the wireless charger into electromagnetic waves; and

transmitting the electromagnetic waves to the electronic device for charging the electronic device via electromagnetic induction.

8. The method as claimed in claim 7, further comprising:

transmitting control signals output from the wireless charger to the electronic device via electromagnetic induction; and

receiving feedback signals from the electronic device.

9. The method as claimed in claim 8, further comprising:

sending an acknowledgement (ACK) command to the electronic device; and

obtaining an identification (ID) number of the electronic device.

10. The method as claimed in claim 9, further comprising identifying the electronic device according to the ID number.

11. The method as claimed in claim 7, further comprising selecting a first proportion of the residual electric power of the wireless charger to charge the electronic device if the residual electric power of the wireless charger is greater than the required electric power of the electronic device.

12. The method as claimed in claim 7, further comprising controlling the wireless charger to not charge the electronic device, or selecting a second proportion of the residual electric power of the wireless charger to charge the electronic device if the residual electric power of the wireless charger is equal to or less than the required electric power of the electronic device.

13. A wireless charger for wirelessly charging a rechargeable electronic device, the wireless charger comprising:

a coil assembly; and

a control unit coupled to the coil assembly, the control unit comprising;

an identification module for identifying a wirelessly rechargeable electronic device;

a detection unit for detecting required electric power of the identified rechargeable device;

a comparing module for determining whether residual electric power of the wireless charger is greater than required electric power of the identified rechargeable device so and

an allocating module for selectively allocating a portion of the residual electric power of the wireless charger for charging the rechargeable electronic device;

wherein, if the comparing module determines that the residual electric power of the wireless charger is greater than the required power of the electronic device, the comparing module sends a first control command to the allocating module directing the allocating module to select a first proportion of the residual power for charging the rechargeable electronic device, and activates the coil assembly which converts the first portion of residual electric power of the wireless charger into electromagnetic waves directing the electromagnetic waves to the rechargeable electronic device for charging; and

wherein, if the comparing module determines that the residual electric power of the wireless charger is equal to or less than the required electric power of the electronic device, the comparing module sends a second control command to the allocating module, the second control command directs the allocating module to select a second proportion of the residual power of the wireless charger for charging the rechargeable electronic device and activate the coil assembly which converts the first portion of residual electric power of the wireless charger into electromagnetic waves and directs the electromagnetic waves to the rechargeable electronic device for charging;

or not to activate the coil assembly.