Double-Sided Bidirectional Wireless Power Device

• US 20150084431A1
• Filed: 12/05/2014
• Published: 03/26/2015
• Est. Priority Date: 07/02/2010
• Status: Active Grant

• Current Assignee: Ming-Hsiang Yeh
• Original Assignee: Ming-Hsiang Yeh
• Inventors: YEH, Ming-Hsiang
• Granted Patent: US 9,667,088 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 7/0034 using reverse polarity correcting or protecting circuits mechanical means of polarity protection H02J7/0045
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence
• CPC Class Codes: H02J 7/0045 concerning the insertion or the connection of the batteries
• CPC Class Codes: H02M 7/217 using semiconductor devices only

Abstract

A double-sided bidirectional wireless power device includes a base and a support board. The base includes a power member. The support board has first and second surfaces and is erected on the base and includes a wireless bidirectional power module built therein, which includes a wireless bidirectional power circuit, an induction resonance circuit, a current/voltage detection unit, and a logic control unit that are electrically connected. To operate, the wireless bidirectional power module receives and converts an alternating current signal into electrical power to be transmitted to the power member for storage. The power member is also operable to transmit electrical power to the wireless bidirectional power module to be converted into an alternating current signal for transmission to an electronic device. The presently disclosed device allows for the simultaneous charging of two electronic devices via the first and second surfaces of the support board.

Claims

1. A double-sided bidirectional wireless power device, adapted to be used with at least one electronic device, the double-sided bidirectional wireless power device comprising:

a base, which comprises a power member; and

at least one support board, which comprises a first surface and a second surface, the support board being mounted on the base, the support board comprising a wireless bidirectional power module built therein, the wireless bidirectional power module comprising a wireless bidirectional power circuit, a induction resonance circuit, a current/voltage detection unit, and a logic control unit that are electrically connected, the wireless bidirectional power module adapted to receive and convert an alternating current signal into electrical power, which is transmitted to the power member for storage, the power member being also operable to transmit electrical power to the wireless bidirectional power module to be converted into an alternating current signal for transmission to the electronic device;

wherein the wireless bidirectional power circuit further comprises a boost/buck unit, a receiving/transmission rectification circuit, a first reverse current prevention device, and a second reverse current prevention device that are electrically connected to each other;

the boost/buck unit comprises a first voltage adjustment terminal, a second voltage adjustment terminal, and two step-up/step-down control terminals, the second voltage adjustment terminal being electrically connected with a transmission terminal of the receiving/transmission rectification circuit, the two step-up/step-down control terminals being respectively and electrically connected with fourth and fifth control pins of the logic control unit, a power pin of the logic control unit being electrically connected with the second voltage adjustment terminal and the transmission terminal that are connected to each other;

the first reverse current prevention device comprises an inlet terminal, an outlet terminal, and a reverse current prevention device control terminal, the outlet terminal and the inlet terminal being respectively and electrically connected with a power receiving terminal of the power member and the first voltage adjustment terminal of the boost/buck unit, the reverse current prevention device control terminal being electrically connected with a first control pin of the logic control unit;

a control switch has a terminal electrically connected with the power supply terminal of the power member and another terminal electrically connected with a control terminal of the second reverse current prevention device and the third control pin of the logic control unit; and

the second reverse current prevention device comprises an inlet terminal, an outlet terminal, and a reverse current prevention device control terminal, the inlet terminal and the outlet terminal being respectively and electrically connected with the power supply terminal of the power member and the first voltage adjustment terminal of the boost/buck unit, the reverse current prevention device control terminal being electrically connected with the third control pin of the logic control unit.

2. The double-sided bidirectional wireless power device as claimed in claim 1, wherein the base further comprises a protection circuit, the protection circuit being electrically connected with the power member.

3. The double-sided bidirectional wireless power device as claimed in claim 1, wherein the boost/buck unit is a boost/buck unit with synchronous rectification and is MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) based synchronous rectification.

4. The double-sided bidirectional wireless power device as claimed in claim 1, wherein the boost/buck unit further comprises an electrical inductor and two boost/buck unit MOSFETs that are connected in series in the same direction, the two boost/buck unit MOSFETs each having a control terminal, the two control terminals being respectively and electrically connected with the two step-up/step-down control terminals of the boost/buck unit, one end of the two series-connected boost/buck unit MOSFETs being electrically connected with the second voltage adjustment terminal and another end being grounded, an end of the electrical inductor being electrically connected with the first voltage adjustment terminal and another end being electrically connected with a point between the two boost/buck unit MOSFETs.

5. The double-sided bidirectional wireless power device as claimed in claim 1, wherein the wireless bidirectional power circuit further comprises a third reverse current prevention device, the third reverse current prevention device comprising an inlet terminal, an outlet terminal, and a reverse current prevention device control terminal, the outlet terminal and the inlet terminal being respectively and electrically connected with the power receiving terminal of the power member and the first reverse current prevention device, the third reverse current prevention device control terminal being electrically connected with the logic control unit.

6. The double-sided bidirectional wireless power device as claimed in claim 1, wherein each of the reverse current prevention devices comprises a first electrical resistor and two reverse current prevention device MOSFETs that are connected in series to be opposite to each other, two ends of the two series-connected reverse current prevention device MOSFETs being respectively the inlet terminal and the outlet terminal of the reverse current prevention device, the two reverse current prevention device MOSFETs each comprising a control terminal, the two control terminals being electrically connected to the reverse current prevention device control terminal, an end of the first electrical resistor being electrically connected to a point between the two reverse current prevention device MOSFETs and another end being also electrically connected with the reverse current prevention device control terminal.

7. The double-sided bidirectional wireless power device as claimed in claim 6, wherein each of the reverse current prevention devices further comprises a transistor and a second electrical resistor, a first terminal of the transistor being electrically connected with the control terminals of the two reverse current prevention device MOSFETs, a second terminal of the transistor being grounded, the second electrical resistor being electrically connected between a third terminal of the transistor and the reverse current prevention device control terminal.

8. The double-sided bidirectional wireless power device as claimed in claim 1, wherein when functioning as a transmitter circuit, the receiving/transmission rectification circuit is an inverter;

and when functioning as a receiver circuit, the receiving/transmission rectification circuit is a synchronous rectification unit.

9. The double-sided bidirectional wireless power device as claimed in claim 8, wherein the receiving/transmission rectification circuit is composed of at least two MOSFETs.

10. The double-sided bidirectional wireless power device as claimed in claim 9, wherein the receiving/transmission rectification circuit is one of a half-bridge power circuit and a full-bridge power circuit.

11. The double-sided bidirectional wireless power device as claimed in claim 1, wherein a second control pin of the logic control unit is electrically connected, in the form of a circuit, to the third control pin.

12. The double-sided bidirectional wireless power device as claimed in claim 1, wherein the control switch is an automatic return switch.