Mobile wireless charger system

• US 20120286724A1
• Filed: 05/11/2011
• Published: 11/15/2012
• Est. Priority Date: 05/11/2011
• Status: Active Grant

• Current Assignee: Fu Da Tong Technology Co., Ltd.
• Original Assignee: Fu Da Tong Technology Co., Ltd.
• Inventors: Tsai, Ming-Chiu, Chan, Chi-Che
• Granted Patent: US 8,519,667 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H02J 2207/40 adapted for charging from various sources, e.g. AC, DC or multivoltage
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/007182 in response to battery voltage
• CPC Class Codes: H02J 7/007192 in response to temperature
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: H02J 7/35 with light sensitive cells

Abstract

A mobile wireless charger system includes a supplying-end module and a receiving-end module. The supplying-end module adjusts the output wave energy to the receiving-end module at a handheld apparatus by means of modulated frequency and driving power. The microprocessor of the supplying-end module can receive different voltage input from different power sources, such as high voltage city power supply or low voltage solar cell for charging a rechargeable battery at the handheld apparatus in a wireless manner.

Claims

1. Mobile wireless charger system comprising a supplying-end module and a receiving-end module adapted for receiving electrical power from said supplying-end module wirelessly for charging an external electronic device being connected thereto, said supplying-end module comprising a supplying-end microprocessor having set therein an operation and control software and a memory, a power supply circuit electrically coupled with said supplying-end microprocessor and adapted for receiving external power supply, a first driver circuit electrically coupled to said supplying-end microprocessor, said first driver circuit comprising a plurality of MOSFET (metal oxide semiconductor field effect transistor) arrays connected in parallel, a second driver circuit electrically coupled to said supplying-end microprocessor, said second driver circuit comprising a plurality of MOSFET (metal oxide semiconductor field effect transistor) arrays connected in parallel, a supplying-end resonant circuit, said supplying-end resonant circuit comprising capacitor array electrically connected to said first driver circuit and a supplying-end coil array electrically connected to said second driver circuit to obtain the necessary working energy, a signal sampling circuit electrically coupled with said supplying-end coil array, a data-analyzing circuit electrically coupled between said supplying-end microprocessor and said signal sampling circuit and a voltage sensing circuit electrically coupled between said supplying-end microprocessor and said signal sampling circuit in a parallel manner relative to said data-analyzing circuit, wherein said power supply circuit of said supplying-end module comprises:

an external power supply unit for input of different voltages;

a power receiver for receiving external power supply;

a storage battery;

a charge control circuit;

a collector circuit electrically coupled with said power receiver and adapted for collecting electric energy from said power receiver for storing in said storage battery subject to the control of said charge control circuit;

a voltage-sensing circuit electrically coupled with said supplying-end microprocessor and adapted for sensing the voltage at said external power supply unit and storage battery;

a first power switch circuit electrically coupled to said supplying-end microprocessor and adapted for receiving power supply from said external power supply unit and transmitting received power supply to said charge control circuit;

a second power switch circuit electrically coupled to said supplying-end microprocessor in a parallel manner relative to said first power switch and adapted for receiving power supply from said external power supply unit and transmitting received power supply to said supplying-end module; and

a third power switch circuit electrically coupled to said supplying-end microprocessor in a parallel manner relative to said first power switch and adapted for receiving power supply from said storage battery and transmitting received power supply to said supplying-end module.

2. The mobile wireless charger system as claimed in claim 1, wherein said external power supply unit is configured for the connection of an USB connector, AC-to-DC transformer or city power plug for input of power supply.

3. The mobile wireless charger system as claimed in claim 1, wherein said power receiver is configured to receive a low power from an external power source of solar battery, kinetic energy cell or thermal energy cell for storing DC power supply in said storage battery.

4. The mobile wireless charger system as claimed in claim 1, wherein when a high power is inputted into said external power supply unit, said supplying-end module switches on said first power switch circuit and said second power switch circuit and switches off said third power switch circuit, enabling inputted power to be directly used for transmitting to said receiving-end module and also to be charged into said storage battery.

5. The mobile wireless charger system as claimed in claim 1, wherein when a low power is inputted into said external power supply unit, said supplying-end module switches on said second power switch circuit and switches off said first power switch circuit and said third power switch circuit, enabling inputted power to be used for transmitting to said receiving-end module.

6. The mobile wireless charger system as claimed in claim 1, wherein when said external power supply unit receives no power input, said supplying-end module switches on said third power switch circuit and switches off said first power switch circuit and said second power switch circuit, enabling the storage power of said storage battery to be used for transmitting to said receiving-end module.

7. The mobile wireless charger system as claimed in claim 1, wherein when said voltage-sensing circuit senses the storage power of said storage battery to become below a predetermined low value, said supplying-end module switches off said first power switch circuit, said second power switch circuit and said third power switch circuit.

8. The mobile wireless charger system as claimed in claim 1, wherein when starting the mobile wireless charger system is started up, said supplying-end microprocessor of said supplying-end module runs the built-in software to read in the default parameters from the memory thereof and then to scan coil resonant points, and at this time, said supplying-end microprocessor scans, in a frequency-modulated manner, the maximum resonant frequencies of said supplying-end coil array and capacitor array of said supplying-end resonant circuit, system predetermined minimum resonant frequency, system normal operating resonant frequency, system maximum operating resonant frequency and the maximum resonant frequency for output by said supplying-end microprocessor, and then stores scanned resonant frequency data in the memory thereof.

9. The mobile wireless charger system as claimed in claim 1, wherein during system operation, said supplying-end microprocessor outputs a transient PWM signal to said first driver circuit/said second driver circuit, driving said supplying-end resonant circuit to transmit electromagnetic energy for sending power supply.

10. The mobile wireless charger system as claimed in claim 1, wherein said signal sampling circuit is controllable by said supplying-end microprocessor to scan feedback data signal from said receiving-end module via said supplying-end coil array.

11. The mobile wireless charger system as claimed in claim 1, wherein said supplying-end module further comprises a temperature sensor module electrically coupled with said supplying-end microprocessor and adapted for sensing the working temperature of said first driver circuit, said second driver circuit and said supplying-end coil array.

12. The mobile wireless charger system as claimed in claim 1, wherein said supplying-end microprocessor controls said voltage sensing circuit to detect the value of the output power of said supplying-end resonant circuit and adjusts the coupled configuration of the MOSFET arrays of said first driver circuit/said second driver circuit.