CONTACTLESS POWER RECEIVING DEVICE, VEHICLE EQUIPPED WITH THE SAME, CONTACTLESS POWER TRANSMITTING DEVICE, AND CONTACTLESS POWER TRANSFER SYSTEM

• US 20140103711A1
• Filed: 06/04/2012
• Published: 04/17/2014
• Est. Priority Date: 06/09/2011
• Status: Abandoned Application

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ichikawa, Shinji, Sakakibara, Hiroyuki
• Application Number:
  US14/123,527
• Publication Number:
  US 20140103711A1
• Time in Patent Office: Days
• US Class Current: 307/10.1
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/12 Buck converters
• CPC Class Codes: B60L 2210/14 Boost 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 2210/42 Voltage source inverters
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• 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 53/126 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 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 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• 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 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
• 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

A resonance coil of a vehicle resonates with a resonance coil of a power transmitting device via an electromagnetic field to thereby receive alternating-current power output from the resonance coil in a noncontact manner. An inverter receives the alternating-current power, received by the resonance coil, from an electromagnetic induction coil, converts the alternating-current power to direct-current power and outputs the direct-current power to a power line. In addition, the inverter converts direct-current power, received from the power line, to alternating-current power and outputs the alternating-current power to the electromagnetic induction coil in order to output electric power from the resonance coil to the resonance coil of the power transmitting device, and electric power is supplied to the resonance coil by the electromagnetic induction coil.

Claims

1. A contactless power receiving device configured to receive electric power output from a power transmitting device in a noncontact manner, comprising:

a power receiving resonator configured to resonate with a power transmitting resonator of the power transmitting device via an electromagnetic field to thereby receive alternating-current power output from the power transmitting resonator in a noncontact manner; and

an inverter configured to convert the alternating-current power, received by the power receiving resonator, to direct-current power, the inverter being configured to output the direct-current power to a power line, the inverter being configured to convert direct-current power received from the power line to alternating-current power in order to output electric power from the power receiving resonator to an outside and the inverter being configured to output the alternating-current power to the power receiving resonator.

2. The contactless power receiving device according to claim 1, further comprising:

a direct-current power supply; and

a converter connected between the direct-current power supply and the power line, the converter being configured to adjust a voltage of the power line.

3. The contactless power receiving device according to claim 2, wherein

the contactless power receiving device is mounted on an electric vehicle that travels using an electric motor,

the converter is a drive converter provided between the direct-current power supply and a driving device of the electric motor, and

the contactless power receiving device further includes a connection device configured to be used to electrically connect the drive converter to the power line when electric power is output from the power receiving resonator.

4. The contactless power receiving device according to claim 2, further comprising:

controller configured to detect a mismatch between the power transmitting resonator and the power receiving resonator on the basis of a transfer condition of electric power between the power transmitting resonator and the power receiving resonator, the controller being configured to drive the inverter and the converter when the mismatch falls within a predetermined range set on the basis of the transfer condition.

5. The contactless power receiving device according to claim 4, wherein

the controller is configured to control the inverter and the converter on the basis of an amount of the mismatch.

6. The contactless power receiving device according to claim 1, further comprising:

controller configured to detect a mismatch between the power transmitting resonator and the power receiving resonator on the basis of a transfer condition of electric power between the power transmitting resonator and the power receiving resonator, the controller being configured to drive the inverter when the mismatch falls within a predetermined range set on the basis of the transfer condition.

7. A vehicle comprising:

the contactless power receiving device according to claim 1.

8. A contactless power transmitting device configured to output electric power to a power receiving device in a noncontact manner, comprising:

a power supplier configured to generate alternating-current power having a predetermined frequency;

a power transmitting resonator configured to resonate with a power receiving resonator of the power receiving device via an electromagnetic field to thereby output the alternating-current power supplied from the power supplier to the power receiving resonator in a noncontact manner; and

a resistive circuit provided between a pair of power lines connected between the power supplier and the power transmitting resonator, the resistive circuit being configured to be electrically connected between the pair of power lines at the time of detection of a mismatch between the power transmitting resonator and the power receiving resonator, and the detection of the mismatch being carried out when the power transmitting resonator receives electric power output from the power receiving resonator.

9. The contactless power transmitting device according to claim 8, wherein

the resistive circuit includes a resistor having a set resistance value and a relay connected in series with the resistor, relay being configured to enter an electrically conductive state at the time of detection of the mismatch.

10. A contactless power transfer system configured to transfer electric power in a noncontact manner, comprising

a power transmitting device including a power supplier configured to generate alternating-current power having a predetermined frequency and a power transmitting resonator configured to output the alternating-current power supplied from the power supplier in a noncontact manner, and

a power receiving device including a power receiving resonator configured to resonate with the power transmitting resonator via an electromagnetic field to thereby receive the alternating-current power output from the power transmitting resonator in a noncontact manner, the power receiving device including an inverter configured to convert the alternating-current power received by the power receiving resonator to direct-current power, the inverter configured to output the direct-current power to a power line, the inverter being configured to convert direct-current power received from the power line to alternating-current power in order to output electric power from the power receiving resonator to an outside, and the inverter being configured to output the alternating-current power to the power receiving resonator.

11. The contactless power transfer system according to claim 10, wherein

the power receiving device further includes a direct-current power supply and a converter connected between the direct-current power supply and the power line, the converter being configure to adjust a voltage of the power line.

12. The contactless power transfer system according to claim 11, wherein

the power receiving device is mounted on an electric vehicle that travels using an electric motor,

the converter is a drive converter provided between the direct-current power supply and a driving device of the electric motor, and

the power receiving device further includes a connection device configured to be used to electrically connect the drive converter to the power line when electric power is output from the power receiving resonator.

13. The contactless power transfer system according to claim 10, wherein

the power transmitting device further includes a resistive circuit provided between a pair of power lines connected between the power supplier and the power transmitting resonator, the resistive circuit being configured to be electrically connected between the pair of power lines at the time of detection of a mismatch between the power transmitting resonator and the power receiving resonator, and the detection of the mismatch being carried out when the power transmitting resonator receives electric power output from the power receiving resonator.

14. The contactless power transfer system according to claim 13, wherein

the resistive circuit includes a resistor having a set resistance value and a relay connected in series with the resistor, the relay entering an electrically conductive state at the time of detection of the mismatch.