Vehicle, electric device, and power transmission/reception system

• US 9,162,581 B2
• Filed: 06/03/2011
• Issued: 10/20/2015
• Est. Priority Date: 06/03/2011
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ichikawa, Shinji
• Primary Examiner(s): WILLIAMS, ARUN C
• Application Number:
  US14/123,367
• Publication Number:
  US 20140103872A1
• Time in Patent Office: 1,600 Days
• Field of Search: 320/108
• US Class Current: 1/1
• CPC Class Codes: B60L 1/006 to power outlets
• 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 53/122 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 53/36 by positioning the vehicle
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/502 the energy repeater being integrated together with the emitter or the receiver
• 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: 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 vehicle includes: a reception device receives power for running the vehicle in a non-contact manner using electromagnetic field resonance; and a transmission device transmits power supplied to a device inside the vehicle in a non-contact manner using the electromagnetic field resonance. An electromagnetic field frequency used by the reception device setting a different electromagnetic field frequency used to transmit power. To set the electromagnetic field frequency used by the reception device to receive power and the electromagnetic field frequency used by the transmission device to transmit power such that the electromagnetic field frequency used to receive power is lower than the electromagnetic field frequency used by the transmission device to transmit power. The power received by the reception device in a non-contact manner from an external transmission device outside the vehicle to be larger than the power transmitted by the transmission device in a non-contact manner.

Claims

1. A vehicle comprising:

a power reception device configured to receive power for running the vehicle in a non-contact manner using electromagnetic field resonance; and

a power transmission device configured to transmit power supplied to an electric device inside the vehicle in a non-contact manner using the electromagnetic field resonance,

wherein a frequency of an electromagnetic field used by the power reception device to receive power is set to be different from a frequency of an electromagnetic field used by the power transmission device to transmit power.

2. The vehicle according to claim 1, wherein the frequency of the electromagnetic field used by the power reception device to receive power and the frequency of the electromagnetic field used by the power transmission device to transmit power are set such that the frequency of the electromagnetic field used by the power reception device to receive power is lower than the frequency of the electromagnetic field used by the power transmission device to transmit power.

3. The vehicle according to claim 2, wherein power received by the power reception device in a non-contact manner from an external power transmission device provided outside the vehicle is larger than power transmitted by the power transmission device to the electric device in a non-contact manner.

4. The vehicle according to claim 3 further comprising:

driving devices configured to drive the vehicle;

a main battery configured to supply power to the driving devices; and

an auxiliary battery separately provided from the main battery,

wherein a voltage of the auxiliary battery is lower than a voltage of the main battery, and

the power transmission device is configured to receive power from the auxiliary battery to transmit power to the electric device.

5. The vehicle according to claim 4 further comprising:

a controller configured to set an operational state of the vehicle to a runnable state or a non-runnable state according to an operation by an occupant,

the controller being configured to permit charging of the main battery with power received by the power reception device and being configured to permit power supply from the power transmission device to the electric device in the runnable state, and the controller being configured to permit charging of the main battery with power received by the power reception device and being configured to prohibit power supply from the power transmission device to the electric device in the non-runnable state.

6. An electric device used inside a vehicle, including:

a power reception device configured to receive power for running the vehicle in a non-contact manner from an external power transmission device using electromagnetic field resonance; and

a power transmission device configured to transmit power supplied to the electric device in a non-contact manner using the electromagnetic field resonance,

the electric device comprising;

a power reception section configured to receive power transmitted from the power transmission device by using a frequency of an electromagnetic field that is different from a frequency of an electromagnetic field used by the power reception device of the vehicle to receive power.

7. The electric device according to claim 6, wherein the power reception section is configured to receive power transmitted from the power transmission device by using the frequency of the electromagnetic field that is higher than the frequency of the electromagnetic field used by the power reception section of the vehicle to receive power.

8. A power transmission/reception system comprising:

a vehicle;

an external power transmission device configured to transmit power to the vehicle in a non-contact manner using electromagnetic field resonance; and

an electric device able to be used inside the vehicle, wherein

the vehicle includes;

a power reception device configured to receive power for running the vehicle in a non-contact manner from the external power transmission device using the electromagnetic field resonance; and

a power transmission device configured to transmit power supplied to the electric device in a non-contact manner using the electromagnetic field resonance, and

a frequency of an electromagnetic field used by the power reception device to receive power is set to be different from a frequency of an electromagnetic field used by the power transmission device to transmit power.