Multi power sourced electric vehicle

• US 9,767,955 B2
• Filed: 05/05/2014
• Issued: 09/19/2017
• Est. Priority Date: 05/09/2008
• Status: Active Grant

• Current Assignee: Auckland UniServices Limited (Auckland University)
• Original Assignee: Auckland UniServices Limited (Auckland University)
• Inventors: Boys, John Talbot, Covic, Grant Anthony
• Primary Examiner(s): NGUYEN, TUYEN T
• Application Number:
  US14/120,197
• Publication Number:
  US 20150008752A1
• Time in Patent Office: 1,233 Days
• Field of Search: 336 84 R, 336 84 M, 336200, 336232
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• 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 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/38 specially adapted for charging by inductive energy transfer
• CPC Class Codes: B60L 53/63 in response to network capacity
• CPC Class Codes: B60L 55/00 Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/363 made of electrically conductive 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 5/00 Coils superconducting coils H01F6/06; fixed inductances of the signal type H01F17/00
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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 7/025 using non-contact coupling, e.g. inductive, capacitive
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• 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
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y04S 10/126 : the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]

Abstract

An inductive power transfer pad for transmitting wireless power to a wireless power receiver separable from the inductive power transfer pad. The inductive power transfer pad includes a coil having at least one turn of a conductor in a first layer and a plurality of ferromagnetic slabs arranged in a second layer substantially parallel to that of the coil, the ferromagnetic slabs being arranged so as to be spaced apart from one another about the coil with their lengths extending across a longitudinal length of the coil.

Claims

1. An inductive power transfer pad to receive power from a transmitting pad, the inductive power transfer pad comprising:

one or more permeable magnetic material members in a first layer;

a coil having at least one turn of a conductor, the coil being arranged in a second layer substantially parallel to that of said permeable magnetic material members; and

a shield member comprising a backplate defining a third layer, said backplate arranged to control electromagnetic flux generated by said transmitting pad.

2. The inductive power transfer pad as claimed in claim 1, having a plurality of permeable magnetic material members in a form of bars each being arranged such that its length extends radially from a common point but spaced apart therefrom.

3. The inductive power transfer pad as claimed in claim 2 wherein the coil is positioned to wind around the common point such that it passes each bar at approximately a center of the length of each bar.

4. The inductive power transfer pad as claimed in claim 1 wherein a plane of the backplate is substantially parallel to planes of each of the permeable magnetic material members and the coil, the plane of the or each permeable magnetic material member is located between the plane of the backplate and the plane of the coil.

5. The inductive power transfer pad as claimed in claim 1 wherein the backplate is formed from a material which substantially inhibits the passage of magnetic flux therethrough.

6. The inductive power transfer pad as claimed in claim 5 wherein the backplate is formed from one at least one of copper and aluminum.

7. The inductive power transfer pad as claimed in claim 1 wherein the backplate extends beyond coil and slabs.

8. The inductive power transfer pad as claimed in claim 1, wherein the or each permeable magnetic material member comprises ferrite.

9. The inductive power transfer pad as claimed in claim 1, wherein the backplate is arranged to control the electromagnetic flux substantially perpendicular to the third layer.

10. The inductive power transfer pad as claimed in claim 1 wherein the shield member is arranged to control the electromagnetic flux between the inductive power transfer pad and the transmitting pad.

11. The inductive power transfer pad as claimed in claim 1 wherein the backplate is arranged to direct electromagnetic flux generated by the transmitting pad.

12. An inductive power transfer pad as claimed in claim 11 wherein the electromagnetic flux is directed substantially perpendicular to the third layer.

13. An inductive power transfer system comprising a wireless power receiver pad separable from a wireless power transmitter pad, the two said pads each comprising:

one or more permeable magnetic material members in a first layer;

a coil having at least one turn of a conductor, the coil being arranged in a second layer substantially parallel to that of said permeable magnetic material members; and

a shield member comprising a backplate defining a third layer, said backplate arranged to control electromagnetic flux.