Contactless power supply device

• US 9,748,773 B2
• Filed: 03/20/2013
• Issued: 08/29/2017
• Est. Priority Date: 03/30/2012
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Mazaki, Kouji, Takahashi, Eisuke, Obayashi, Kazuyoshi
• Primary Examiner(s): Amaya, Carlos
• Application Number:
  US14/389,591
• Publication Number:
  US 20150076918A1
• Time in Patent Office: 1,623 Days
• Field of Search: 307104
• CPC Class Codes: B60L 1/003 to auxiliary motors, e.g. for pumps, compressors
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/36 by positioning the vehicle
• CPC Class Codes: B60L 53/38 specially adapted for charging by inductive energy transfer
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: B60M 7/003 for vehicles using stored power (e.g. charging stations)
• CPC Class Codes: H01F 2027/348 Preventing eddy currents
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• 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 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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 7/02 for charging batteries from ac mains by converters
• 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 10/72 : Electric energy management in electromobility
• 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

Abstract

A contactless power supply device includes a power-transmitting-side pad and a power-receiving-side pad. Each of the power-transmitting-side pad and the power-receiving-side pad has a core and a coil. The core has a plate-shaped yoke portion. The coil has a first coil portion and a second coil portion. The first coil portion is arranged on a top surface of the yoke portion. The second coil portion is arranged along an outer periphery of the yoke portion.

Claims

1. A contactless power supply device comprising:

a power-transmitting-side pad, and

a power-receiving-side pad, wherein

each of the power-transmitting-side pad and the power-receiving-side pad has a core made of a magnetic material and a coil in contact with the core,

the power-transmitting-side pad transmits power to the power-receiving-side pad in a contactless manner with the power-transmitting-side pad facing the power-receiving-side pad,

the core has a plate-shaped yoke portion,

the coil has a first coil portion and a second coil portion,

the first coil portion is arranged on one of opposing surfaces of each yoke portion in a thickness direction of the yoke portion, and the one of the opposing surfaces of the yoke portion of the power-transmitting-side pad faces the one of the opposing surfaces of the yoke portion of the power-receiving-side pad,

the second coil portion is arranged along an outer periphery of each yoke portion,

the core has a magnetic pole portion;

the magnetic pole portion is in contact with the one of the opposing surfaces of the yoke portion;

the one of the opposing surfaces of the yoke portion is surrounded by the coil;

the first coil portion is arranged on the one of the opposing surfaces of the yoke portion; and

the second coil portion is at least partially located within a region occupied by the magnetic pole portion when viewed from the thickness direction of the yoke portion.

2. The contactless power supply device according to claim 1, wherein

a size of the magnetic pole portion in the thickness direction is equal to a size of the first coil portion in the thickness direction.

3. The contactless power supply device according to claim 1, wherein

the yoke portion and the magnetic pole portion are integrated together.

4. The contactless power supply device according to claim 1, wherein

the yoke portion and the magnetic pole portion are made of materials having different magnetic properties.

5. The contactless power supply device according to claim 1, further comprising:

an electrical conductor arranged on a side of the other of the opposing surfaces of the yoke portion.

6. The contactless power supply device according to claim 5, wherein

the core and the coil are located within a region occupied by the electrical conductor when viewed from the thickness direction of the yoke portion.

7. The contactless power supply device according to claim 5, wherein

the electrical conductor is in contact with the yoke portion and the second coil portion.

8. The contactless power supply device according to claim 1, wherein

the power-transmitting-side pad is installed outside a vehicle,

the power-receiving-side pad is mounted on the vehicle, and

the power is transmitted to the vehicle from outside the vehicle in the contactless manner.

9. The contactless power supply device according to claim 1, wherein:

the coil is not arranged on the other of opposing surfaces of each yoke portion.

10. The contactless power supply device according to claim 1, wherein:

the first coil portion and the second coil portion are arranged on a same plane in parallel to the one of the opposing surfaces of the yoke portion.