Wireless Power Reception Module

• US 20180137971A1
• Filed: 05/24/2016
• Published: 05/17/2018
• Est. Priority Date: 05/26/2015
• Status: Active Grant

• Current Assignee: Amosense Co., Ltd.
• Original Assignee: Amosense Co., Ltd.
• Inventors: Jang, Kil Jae
• Granted Patent: US 10,475,571 B2
• Time in Patent Office: Days
• CPC Class Codes: H01F 2003/106 Magnetic circuits using combinations of different magnetic materials
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/366 made of ferromagnetic material
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01F 7/0247 Orientating, locating, transporting arrangements
• CPC Class Codes: H01Q 1/2208 associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems methods or arrangements for sensing record carriers, e.g. for reading patterns G06K7/00; record carrier for use with machines and with at least a part designed to carry digital markings G06K19/00
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 5/30 Arrangements for providing operation on different wavebands
• CPC Class Codes: H01Q 7/06 with core of ferromagnetic material H01Q7/02 takes precedence
• 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 50/27 characterised by the type of receiving antennas, e.g. rectennas
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields

Abstract

The wireless power receiving module is disclosed. According to one embodiment of the present invention, the wireless power receiving module, to interact with a wireless power transmitting module including at least one wireless power transmitting antenna and a permanent magnet, includes an antenna unit including the wireless power receiving antenna formed of a hollow portion having a predetermined area at a central portion of a pattern portion and a shielding unit disposed on one surface of the antenna unit so as to shield a magnetic field. The shortest length between the inner sides of a coil pattern portion facing each other is the same as or larger than a diameter of the permanent magnet.

Claims

1. A wireless power receiving module to interact with a wireless power transmitting module including at least one wireless power transmitting antenna and a permanent magnet, comprising:

an antenna unit including a wireless power receiving antenna of which coil pattern portion is formed with a hollow portion having at a central portion of a predetermined area; and

a shielding unit disposed on one surface of the antenna unit so as to shield a magnetic field,

wherein in the wireless power receiving module, a shortest length between inner sides of the coil pattern portion facing each other is the same as or lager than a diameter of the permanent magnet.

2. The wireless power receiving module of claim 1, wherein the shortest length between inner sides of the coil pattern portion of the wireless power receiving antenna facing each other is an equal to or shorter than a shortest length between the inner sides of coil pattern portion of the wireless power transmitting antenna facing each other.

3. The wireless power receiving module of claim 1, wherein the shortest length is a straight line passing a center point of the hollow portion.

4. The wireless power receiving module of claim 1, wherein the wireless power receiving antenna includes a flat conductive coil wound a plurality of times, or a printed conductive pattern on a side of a circular board.

5. The wireless power receiving module of claim 1, wherein the wireless power receiving module includes a magnetic body for changing a magnetic flux by inducing a part of magnetic force lines generated by the permanent when the wireless power receiving module approaches the wireless power transmitting module.

6. The wireless power receiving module of claim 1, wherein when the diameter of the permanent magnet is 15.5 mm, a total thickness of the shielding unit is 0.10 mm to 0.16 mm.

7. The wireless power receiving module of claim 1, wherein the antenna unit is a combo type further including at least one other antenna using a different frequency band from the wireless power receiving antenna.

8. The wireless power receiving module of claim 7, wherein at least one other antenna includes at least one of a magnetic secure transmission (MST) antenna and a near field communication (NFC) antenna.

9. The wireless power receiving module of claim 7, wherein the shielding unit includes a first shielding sheet and a second shielding sheet both of which have different characteristics in a predetermined frequency band.

10. The wireless power receiving module of claim 9, wherein the first shielding sheet is disposed on an area corresponding to the wireless power receiving antenna, and the second shielding sheet is disposed on an area corresponding to the other antenna.

11. The wireless power receiving module of claim 9, wherein the first shielding sheet has a relatively higher permeability than a permeability of the second shielding sheet in a frequency band of 100 to 300 kHz.

12. The wireless power receiving module of claim 9, wherein when the first shielding sheet has the same permeability as the second shielding sheet in a frequency band of 100 to 300 kHz, a permeability loss rate of the first shielding sheet is a relatively smaller value than a permeability loss rate of the second shielding sheet.

13. The wireless power receiving module of claim 9, wherein the second shielding sheet has a relatively higher permeability than a permeability of the first shielding sheet at a frequency of 13.56 MHz.

14. The wireless power receiving module of claim 9, wherein when the second shielding sheet has the same permeability as the first shielding sheet at a frequency of 13.56 MHz, the permeability loss rate of the second shielding sheet is a relatively smaller value than the permeability loss rate of the first shielding sheet.

15. The wireless power receiving module of claim 9, wherein the first shielding sheet is a ribbon sheet including at least one of an amorphous alloy and a nanocrystalline alloy, and the second shielding sheet is a ferrite sheet.

16. The wireless power receiving module of claim 1, wherein the shielding unit includes any one of a ribbon sheet including at least one of an amorphous alloy and a nanocrystal alloy, a ferrite sheet, and a polymer sheet.

17. The wireless power receiving module of claim 1, wherein the shielding unit includes a plurality of ribbon sheets, including at least one of an amorphous alloy and a nanocrystal alloy, stacked in multiple layers.