WIRELESS CHARGING COIL STRUCTURE IN ELECTRONIC DEVICES

• US 20120074899A1
• Filed: 10/18/2011
• Published: 03/29/2012
• Est. Priority Date: 08/04/2011
• 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 8,754,609 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• 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 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence

Abstract

The present inventions relates a wireless charging coil structure in electronic devices, comprising a PS coil module capable of emitting electromagnetic wave energy and a PR coil module capable of receiving power energy by electromagnetic induction. Each of the PS and PR coil modules includes a bar-shaped magnetic conductor, on which an insulated wire is wound into a first coil that is extended along the magnetic conductor to a given length and wound reversely into a second coil, thus producing an induction coil comprising at least the first and second coils. The induction range with given space formed between the first and second coils is used for electromagnetic induction to transmit signals and power energy. Such structure can be applied not only in planar handheld electronic devices, but also in other wireless power transmission systems that require narrow induction surface for power transmission.

Claims

1. A wireless charging coil structure in electronic products, comprising a power sourcing (PS) coil module capable of emitting electromagnetic wave energy and a power receiving (PR) coil module capable of receiving power energy by electromagnetic induction, and the PS coil module and PR coil module containing a bar-shaped magnetic conductor respectively;

an insulated wire is used to be wound on the magnetic conductor in the same direction into a first coil, which is extended along the magnetic conductor to a given length and wound reversely into a second coil, making the first and second coils form an induction range with given space, thus establishing an induction coil consisting of at least the first coil and second coil wound in different directions and with given space between them.

2. The wireless charging coil structure in electronic products according to claim 1, wherein the cross section of the magnetic conductors of the PS coil module and PR coil module is shaped like any of a square, rectangle and polygon.

3. The wireless charging coil structure in electronic products according to claim 1, wherein the magnetic conductors of the PS coil module and PR coil module may be made of magnetic materials with high permeability properties.

4. The wireless charging coil structure in electronic products according to claim 1, wherein the magnetic conductors of the PS coil module and PR coil module may be any of iron powder cores, MPP cores, sendust cores, ferrite cores and high flux cores.

5. The wireless charging coil structure in electronic products according to claim 1, wherein at least one magnet is fixed within the induction range of the induction coil on the magnetic conductors of the PS coil module and PR coil module respectively, so as to make the induction ranges align each other by making use of magnetic pull of the magnets with different polarities on the two magnetic conductors.

6. The wireless charging coil structure in electronic products according to claim 1, wherein at least one containing groove is established within the induction ranges of the induction coils on the magnetic conductors of the PS coil module and PR coil module respectively, and magnets are fixed in the containing grooves, so as to make the induction ranges align each other by making use of magnetic pull of the magnets with different polarities on the two magnetic conductors.