WIRELESS CHARGER

• US 20140191710A1
• Filed: 01/07/2013
• Published: 07/10/2014
• Est. Priority Date: 01/07/2013
• Status: Active Grant

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: van Lammeren, Johannes Petrus Maria, Brink, Klaas, Sedzin, Aliaksei Vladimirovich, Knubben, Wihelmus H. C.
• Granted Patent: US 9,419,465 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: B60L 53/36 by positioning the vehicle
• CPC Class Codes: H02J 50/001 Energy harvesting or scavenging
• 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 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/0031 for data transfer
• CPC Class Codes: H04B 5/0037 for power transfer
• CPC Class Codes: H04B 5/0081 with antenna coils loop aerials H01Q7/00
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A wireless charger is disclosed. The charger contains a coil with a plurality of taps, thereby facilitating charging according to different frequencies and standards. Detection of the standard appropriate to a particular receiver may be accomplished by modulation of the power carrier or via low power modalities, including NFC or Bluetooth.

Claims

1. An apparatus for wirelessly charging a receiver comprising:

a coil having one or more taps;

each of said taps being connected to a transmitter; and

a controller capable of directing said transmitter to provide charging energy via that portion of said coil energized via a selected tap.

2. The apparatus of claim 1 in which each of said taps is connected to a respective transmitter.

3. The apparatus of claim 2 in which a switch is connected between each of said taps and its respective transmitter.

4. The apparatus of claim 3 further comprising a controller connected to control each said transmitter and open and close said switches.

5. The apparatus of claim 1 further including an NFC element connected to one of said taps.

6. The apparatus of claim 5 in which said NFC element is a tag.

7. The apparatus of claim 4 in which said controller is capable of directing at least one transmitter to transmit a modulated signal on its power carrier.

9. The apparatus of claim 5 in which said NFC element is capable of transmitting and receiving NFC signals.

8. An apparatus for wirelessly charging a receiver comprising:

a coil with a plurality of taps, each of said taps defining a respective portion of said coil;

a plurality of switches, each of said switches being connected to a respective tap;

a plurality of transmitters, each of said transmitters being connectable to a respective tap by closing said respective switch;

a controller adapted to;

(i) close a selected switch;

(ii) choose a respective transmitter and cause said transmitter to transmit charging energy through said selected switch and thereby energize said respective portion of said coil;

(iii) cause said respective transmitter to transmit a modulated communication signal.