System and method for reducing interference in a wireless power transfer system

• US 10,389,145 B2
• Filed: 06/16/2017
• Issued: 08/20/2019
• Est. Priority Date: 06/16/2017
• Status: Active Grant

• Current Assignee: WiTricity Corporation
• Original Assignee: WiTricity Corporation
• Inventors: Islinger, Simon, Scibor, Rafal, Fischer, Marcel, Percebon, Leandro, Raabe, Stefan, Pavlovsky, Martin, Friedel, Jonas
• Primary Examiner(s): Williams, Arun C
• Application Number:
  US15/625,882
• Publication Number:
  US 20180361863A1
• Time in Patent Office: 795 Days
• Field of Search: 320108
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: B60L 53/124 Detection or removal of foreign bodies
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/30 Constructional details of charging stations
• CPC Class Codes: B60L 53/31 Charging columns specially adapted for electric vehicles
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 3/322 the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• 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

One aspect of the disclosure provides an apparatus for conveying wireless power. The apparatus comprises a circuit board disposed along one or more planar coils and a plurality of feeds. The circuit board is divided into a first area separate from a second area. The first area has a plurality of first voltage components and the second area has a plurality of second voltage components. The first voltage components operates at a lower voltage than the second voltage components. The plurality of feeds are coupled to the one or more planar coils and the circuit board. The plurality of feeds pass through the circuit board within the second area along a side of the circuit board and couple to one or more of the second voltage components.

Claims

1. An apparatus for conveying wireless power, comprising:

a circuit board disposed along one or more planar coils, the circuit board divided into a first area separate from a second area, the first area having a plurality of first voltage components and the second area having only a plurality of second voltage components, the first voltage components operating at a lower voltage than the second voltage components; and

a plurality of feeds coupled to the one or more planar coils and the circuit board, the plurality of feeds passing through the circuit board within only the second area along a side of the circuit board and coupled to one or more of the second voltage components.

2. The apparatus of claim 1, wherein the plurality of feeds are configured to convey a voltage signal from the one or more planar coils to the plurality of second voltage components and wherein a space between a position of the second area and a position of the first area reduces an interference of the first voltage components by the voltage signal.

3. The apparatus of claim 1, further comprising one or more conductors arranged in the one or more planar coils, wherein the plurality of feeds run substantially perpendicular to both the one or more planar coils and the circuit board.

4. The apparatus of claim 1, further comprising a housing disposed along the one or more planar coils and between the one or more planar coils and the circuit board.

5. The apparatus of claim 4, wherein the housing is configured to protect the circuit board and the first and second voltage components from environmental exposure and impacts.

6. The apparatus of claim 4, wherein the housing defines a first plurality of holes extending from a first surface to a second surface of, and through the housing, the first surface opposite the second surface, wherein the circuit board defines a second plurality of holes extending from a first surface to a second surface of, and through the circuit board, the first surface opposite the second surface, and wherein the plurality of feeds penetrates the housing via the first plurality of holes and penetrates the circuit board via the second plurality of holes when coupling the one or more coils to the one or more high voltage components.

7. The apparatus of claim 1, wherein the one or more planar coils are configured to generate a wireless field and transfer power wirelessly to one or more wireless power receivers via the magnetic field.

8. The apparatus of claim 1, wherein the one or more planar coils are configured to generate an induced voltage based on exposure to a wireless field generated by a wireless power transmitter.

9. The apparatus of claim 1, further comprising a ferromagnetic structure disposed along a first side of the one or more planar coils, wherein the plurality of feeds is coupled to the circuit board and the one or more planar coils without penetrating the ferromagnetic structure.

10. A method of manufacturing an apparatus for wirelessly conveying power, the method comprising:

providing a ferromagnetic structure disposed along a first side of one or more planar coils;

providing a circuit board disposed along the ferromagnetic structure on a second side opposite the one or more planar coils;

dividing the circuit board into a first area separate from a second area, the first area having an arrangement of first voltage components and the second area having an arrangement of only second voltage components, the first voltage components operating at a lower voltage than the second voltage components; and

providing a plurality of feeds coupled to the one or more planar coils and the circuit board without penetrating the ferromagnetic structure, wherein the plurality of feeds penetrate the circuit board within only the second area and couple to one or more of the second voltage components.

11. The method of claim 10, wherein the plurality of feeds are configured to convey a voltage signal from the one or more planar coils to the plurality of second voltage components and wherein a space between a position of the second area and a position of the first area reduces an interference of the first voltage components by the voltage signal.

12. The method of claim 10, wherein the one or more planar coils comprise one or more conductors and wherein the plurality of feeds runs substantially perpendicular to both the one or more planar coils and the circuit board.

13. The method of claim 10, further comprising providing a housing along the one or more planar coils and between the one or more planar coils and the circuit board.

14. The method of claim 13, wherein the housing is configured to protect the circuit board and the first and second voltage components from environmental exposure and impacts.

15. The method of claim 13, wherein the housing defines a first plurality of holes extending from a first surface to a second surface of, and through the housing, the first surface opposite the second surface, wherein the circuit board defines a second plurality of holes extending from a first surface to a second surface of, and through the circuit board, the first surface opposite the second surface, and wherein the plurality of feeds penetrates the housing via the first plurality of holes and penetrates the circuit board via the second plurality of holes when coupling the one or more coils to the one or more high voltage components.

16. The method of claim 10, wherein the one or more planar coils are configured to generate a wireless field and transfer power wirelessly to one or more wireless power receivers via the magnetic field.

17. The method of claim 10, wherein the one or more planar coils are configured to generate an induced voltage based on exposure to a wireless field generated by a wireless power transmitter.

18. The method of claim 10, further comprising providing a ferromagnetic structure along a first side of the one or more planar coils, wherein the plurality of feeds is coupled to the circuit hoard and the one or more planar coils without penetrating the ferromagnetic structure.

19. An apparatus for conveying wireless power, comprising:

one or more means for conveying wireless power;

means for supporting a circuit disposed along the one or more means for conveying energy, the means for supporting a circuit divided into a first area separate from a second area, the first area having a plurality of first voltage components and the second area having only a plurality of second voltage components, the first voltage components operating at a lower voltage than the second voltage components; and

a plurality of means for conveying power coupled to the one or more means for conveying power and the means for supporting a circuit, the plurality of means for conveying power passing through the means for supporting a circuit within only the second area along a side of the means for supporting a circuit and coupled to one or more of the second voltage components.

20. The apparatus of claim 19, wherein the plurality of means for conveying power are configured to convey a voltage signal from the one or more means for conveying wireless power to the plurality of second voltage components and wherein a space between a position of the second area and a position of the first area reduces an interference of the first voltage components by the voltage signal.

21. The apparatus of claim 19, further comprising one or more conductors arranged in the one or more means for conveying wireless power, wherein the plurality of feeds run substantially perpendicular to both the one or more means for conveying wireless power and the means for supporting a circuit.

22. The apparatus of claim 19, further comprising a housing disposed along the ferromagnetic structure on a side opposite the one or more planar coils and between the ferromagnetic structure and the means for supporting a circuit.

23. The apparatus of claim 22, wherein the housing is configured to protect the means for supporting a circuit and the first and second voltage components from environmental exposure and impacts.

24. The apparatus of claim 22, wherein the housing defines a first plurality of holes extending from a first surface to a second surface of, and through the housing, the first surface opposite the second surface, wherein the means for supporting a circuit defines a second plurality of holes extending from a first surface to a second surface of, and through the means for supporting a circuit, the first surface opposite the second surface, and wherein the plurality of feeds penetrates the housing via the first plurality of holes and penetrates the means for supporting a circuit via the second plurality of holes when coupling the one or more coils to the one or more high voltage components.

25. The apparatus of claim 19, wherein the one or more means for conveying wireless power are configured to generate a wireless field and transfer power wirelessly to one or more wireless power receivers via the magnetic field.

26. The apparatus of claim 19, wherein the one or more means for conveying wireless power are configured to generate an induced voltage based on exposure to a wireless field generated by a wireless power transmitter.

27. The apparatus of claim 19, further comprising a ferromagnetic structure disposed along a first side of the one or more means for conveying wireless power, wherein the plurality of means for conveying power is coupled to the means for supporting a circuit and the one or more means for conveying wireless power without penetrating the ferromagnetic structure.