Attachable wireless charging device

• US 20090184679A1
• Filed: 12/02/2008
• Published: 07/23/2009
• Est. Priority Date: 01/17/2008
• Status: Active Grant

• Current Assignee: Ming-Hsiang Yeh
• Original Assignee: Ming-Hsiang Yeh
• Inventors: Yeh, Ming-Hsiang
• Granted Patent: US 7,944,171 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 7/0034 using reverse polarity correcting or protecting circuits mechanical means of polarity protection H02J7/0045

Abstract

An attachable wireless charging device includes a carrier board, a receiving coil, a circuit board, and at least two conductive wires. The carrier board has a back surface on which an adhesive layer is coated. The receiving coil is formed in the carrier board. The circuit board is mounted to one side of the carrier board and includes a power receiving circuit, which includes a receiving control circuit, a resonance control circuit, a regulation circuit, a control circuit, a polarity selection circuit, and a circuit output section, which are electrically and sequentially connected. Electrical connection is established between the receiving control circuit and the receiving coil. The at least two conductive wires are arranged at one side of the circuit board and are electrically connectable with the circuit output section of the circuit board. As such, an attachable wireless charging device featuring automatic determination of polarity connection is provided.

Claims

1. An attachable wireless charging device, comprising:

a carrier board, which has a back surface on which an adhesive layer is coated;

a receiving coil, which is formed in the carrier board;

a circuit board, which is mounted to one side of the carrier board, the circuit board comprising a power receiving circuit, which comprises a receiving control circuit, a resonance control circuit, a regulation circuit, a control circuit, a polarity selection circuit, and a circuit output section, which are electrically and sequentially connected, electrical connection being established between the receiving control circuit and the receiving coil; and

at least two conductive wires, which are arranged at one side of the circuit board and are electrically connected to the circuit output section of the circuit board;

whereby an attachable wireless charging device featuring automatic determination of polarity connection for charging

2. The attachable wireless charging device as claimed in claim 1, wherein the adhesive layer comprises a repeatedly attachable adhesive, adapted to be repeatedly attachable to an external object.

3. The attachable wireless charging device as claimed in claim 1, wherein the circuit board comprises a flexible printed circuit.

4. The attachable wireless charging device as claimed in claim 1, wherein each of the conductive wires has an electrode connection terminal for engaging an electrode of a battery for transmission of electrical power therethrough.

5. The attachable wireless charging device as claimed in claim 1, wherein the polarity selection circuit of the power receiving circuit of the circuit board comprises four switches and an electrical cell, two of the switches being connected in serial to each other as a first group, the remaining two of the switches being connected in serial to each other as a second group, the two groups of the serially connected switches being connected in parallel to the control circuit respectively, the first group of the serially connected switches forming a first polarity node therebetween, the second group of the serially connected switches forming a second polarity node therebetween, the cell being electrically connected between the first and second polarity nodes, the first and second polarity nodes being electrically connected to the circuit output section, the circuit output section being electrically engageable with a rechargeable battery through the conductive wires to carry out automatic determination of polarity connection with the rechargeable battery in order to protect the rechargeable battery from being damaged due to revered polarity connection and thus facilitate charging to the rechargeable battery.

6. The attachable wireless charging device as claimed in claim 5, wherein the switches of the polarity selection circuit selectively comprise P-channel enhancement MOSFETs and N-channel enhancement MOSFETs.

7. The attachable wireless charging device as claimed in claim 5 further comprising a protection switch connected in serial between the two switches of at least one of the first and second groups, the protection switch being in electrical connection with the control circuit.

8. The attachable wireless charging device as claimed in claim 7, wherein the protection switch of the polarity selection circuit selectively comprises P-channel enhancement MOSFET and N-channel enhancement MOSFET.