Power reception device, power transmission device and vehicle

• US 9,623,758 B2
• Filed: 09/05/2014
• Issued: 04/18/2017
• Est. Priority Date: 10/01/2013
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Yuasa, Hiroaki
• Primary Examiner(s): Fantu, Yalkew
• Application Number:
  US14/478,539
• Publication Number:
  US 20150091514A1
• Time in Patent Office: 956 Days
• Field of Search: 320108
• CPC Class Codes: B60L 2240/485 Temperature
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• 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: 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 50/12 of the resonant type
• 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: 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

A power reception device includes a core unit having a plate-like shape, a plate-like fixing member having the core unit housed therein, a power reception coil, and a temperature measuring unit. Assuming that a side surface wound portion refers to a portion of a side surface of core unit around which the power reception coil is wound, and a center portion refers to a portion located at the center of the side surface wound portion in an extending direction of a coil winding axis and at the center of the core unit in a thickness direction, temperature measuring unit is provided in at least one of a high-temperature region including the center portion of the core unit and a portion around the center portion, and a position on a surface of the fixing member that faces the high-temperature region.

Claims

1. A power reception device that is mounted on a vehicle and receives electric power in a contactless manner from a power transmission device having a power transmission coil, with the power reception device facing the power transmission device, the power reception device comprising:

a core unit having a plate-like shape and including a side surface, an upper surface and a lower surface, the side surface having a planar shape;

a plate-like fixing member having the core unit housed therein;

a power reception coil spirally wound around a perimeter surface of the fixing member to surround a coil winding axis, the coil winding axis extending in a direction parallel to a frontward-backward direction of a main body of the vehicle; and

a temperature measuring unit that measures a temperature of the core unit, the temperature measuring unit is provided in at least one of (i) a high-temperature region including a center portion of the core unit and a portion around the center portion, and (ii) a position on a surface of the fixing member that faces the high-temperature region, wherein

a portion of the side surface of the core unit around which the power reception coil is wound is a side surface wound portion, and

the center portion of the core unit is located at a center of the side surface wound portion in an extending direction of the coil winding axis and at a center of the core unit in a thickness direction of the core unit.

2. The power reception device according to claim 1, wherein

the portion around the center portion is a region including a peripheral region of the side surface located on a periphery of the center portion, an upper surface adjacent region of the upper surface adjacent to the peripheral region, and a lower surface adjacent region of the lower surface adjacent to the peripheral region.

3. The power reception device according to claim 2, wherein

the peripheral region is a region closer to the center portion in the extending direction of the coil winding axis than one end of a portion in which the power reception coil is wound around the fixing member, and closer to the center portion in the extending direction of the coil winding axis than the other end of the portion in which the power reception coil is wound around the fixing member, and

the upper surface adjacent region and the lower surface adjacent region are regions located at a position closer to the side surface of the core unit than the coil winding axis in a direction orthogonal to the coil winding axis.

4. The power reception device according to claim 1, wherein

the core unit includes a plurality of divided cores arranged side by side in a row direction and/or in a column direction.

5. The power reception device according to claim 1, wherein

the temperature measuring unit is provided at the fixing member, and

the temperature measuring unit is arranged to face the high-temperature region, with the fixing member interposed therebetween.

6. A vehicle, comprising:

the power reception device as recited in claim 1 mounted to the vehicle; and

the vehicle main body having an exhaust pipe on a bottom surface thereof, wherein

the power reception device is arranged below the exhaust pipe, and

the temperature measuring unit is arranged to face the upper surface of the core unit.

7. A vehicle, comprising:

a control unit;

a communication unit for communicating with a power transmission device provided outside the vehicle; and

the power reception device as recited in claim 1 mounted to the vehicle, wherein

when the control unit determines that the temperature measured by the temperature measuring unit is equal to or higher than a threshold value, the control unit transmits a signal for stopping power transmission to the power transmission device through the communication unit.

8. The vehicle according to claim 7, wherein

when the control unit determines that the temperature measured by the temperature measuring unit is lower than the threshold value, the control unit transmits a signal for starting or continuing power transmission to the power transmission device through the communication unit.

9. A vehicle, comprising:

a control unit;

a communication unit for communicating with a power transmission device provided outside the vehicle; and

the power reception device as recited in claim 1 mounted to the vehicle, wherein

when the control unit determines that the temperature measured by the temperature measuring unit is equal to or higher than a threshold value, the control unit transmits a signal for reducing transmitted electric power to the power transmission device through the communication unit.

10. A power transmission device that transmits electric power in a contactless manner to a power reception device having a power reception coil, with the power transmission device facing the power reception device, the power transmission device comprising:

a core unit having a plate-like shape and including a side surface, an upper surface and a lower surface, the side surface having a planar shape and being elongated in a longitudinal direction;

a plate-like fixing member having the core unit housed therein;

a power transmission coil spirally wound around a perimeter surface of the fixing member to surround a coil winding axis, the coil winding axis extending in a direction parallel to the longitudinal direction in which the side surface extends; and

a temperature measuring unit that measures a temperature of the core unit, the temperature measuring unit is provided in at least one of (i) a high-temperature region including a center portion of the core unit and a portion around the center portion, and (ii) a position on a surface of the fixing member that faces the high-temperature region, wherein

a portion of the side surface of the core unit around which the power transmission coil is wound is a side surface wound portion, and

the center portion of the core unit is located at a center of the side surface wound portion in an extending direction of the coil winding axis and at a center of the core unit in a thickness direction of the core unit.