Wireless power receiving system, mobile object, and vehicle wheel

Patent metadata

Field	Value
Publication number	US-12115871-B2
Application number	US-202017597788-A
Country	US
Kind code	B2
Filing date	Jul 22, 2020
Priority date	Jul 25, 2019
Publication date	Oct 15, 2024
Grant date	Oct 15, 2024

Abstract

A wireless power receiving system includes: a power receiving device having a power receiving coil configured to receive electric power supplied wirelessly from a power transmission coil of a power transmission device installed on a road surface, at least part of the power receiving coil being contained in a vehicle wheel; and in-vehicle devices installed in a mobile object, the in-vehicle devices being energizably connected to the power receiving device. The power receiving device transmits the received electric power to the in-vehicle devices.

First claim

The invention claimed is:

1. A wireless power receiving system comprising:
a vehicle wheel of a mobile object;
a power receiving device having a power receiving coil configured to receive electric power supplied wirelessly from a power transmission coil of a power transmission device at least partially embedded in a road, at least part of the power receiving coil being contained in the vehicle wheel; and
at least one in-vehicle device installed in the mobile object, the in-vehicle device being energizably connected to the power receiving device,
wherein the power receiving coil is capable of supplying electric power bidirectionally,
the power receiving device is configured to transmit the electric power received from the power transmission device to the in-vehicle device and wirelessly transmit electric power supplied from the in-vehicle device to a device at least partially embedded in the road,
the vehicle wheel is a tire-wheel assembly constituted of a tire and a wheel,
the wheel comprises a rim portion formed of a resin material, and
the at least part of the power receiving coil is contained inside the rim portion of the wheel in a tire radial direction.

2. The wireless power receiving system according to claim 1 , wherein the in-vehicle device includes a drive device configured to drive the vehicle wheel by the electric power received from the power transmission device.

3. The wireless power receiving system according to claim 2 , wherein the drive device is an in-wheel motor at least part of which is contained in the vehicle wheel.

4. The wireless power receiving system according to claim 1 , wherein the in-vehicle device includes a power storage device configured to store the electric power received from the power transmission device.

5. The wireless power receiving system according to claim 1 , wherein the at least one in-vehicle device is a plurality of in-vehicle devices, and the power receiving device transmits the electric power received from the power transmission device to at least one of the plurality of the in-vehicle devices based on a predetermined condition.

6. The wireless power receiving system according to claim 1 , wherein the power receiving device and the in-vehicle device are energizably connected by a wire.

7. The wireless power receiving system according to claim 1 , wherein the power receiving device and the in-vehicle device are energizably connected wirelessly.

8. The wireless power receiving system according to claim 1 , wherein the mobile object is able to perform autonomous driving.

9. The wireless power receiving system according to claim 1 , wherein at least part of a coil plane of the power receiving coil is opposite a ground surface, in contact with a road surface of the road, of the vehicle wheel.

10. A mobile object comprising:
a vehicle wheel;
a power receiving device having a power receiving coil configured to receive electric power supplied wirelessly from a power transmission coil of a power transmission device at least partially embedded in a road, at least part of the power receiving coil being contained in the vehicle wheel; and
an in-vehicle device energizably connected to the power receiving device,
wherein the power receiving coil is capable of supplying electric power bidirectionally,
the power receiving device is configured to transmit the electric power received from the power transmission device to the in-vehicle device and wirelessly transmit electric power supplied from the in-vehicle device to a device at least partially embedded in the road,
the vehicle wheel is a tire-wheel assembly constituted of a tire and a wheel,
the wheel comprises a rim portion formed of a resin material, and
the at least part of the power receiving coil is contained inside the rim portion of the wheel in a tire radial direction.

11. A vehicle wheel for a mobile object, comprising:
a power receiving device having a power receiving coil configured to receive electric power supplied wirelessly from a power transmission coil of a power transmission device at least partially embedded in a road, at least part of the power receiving coil being contained in the vehicle wheel; and
an in-vehicle device energizably connected to the power receiving device,
wherein the power receiving coil is capable of supplying electric power bidirectionally,
the power receiving device is configured to transmit the electric power received from the power transmission device to the in-vehicle device and wirelessly transmit electric power supplied from the in-vehicle device to a device at least partially embedded in the road,
the vehicle wheel is a tire-wheel assembly constituted of a tire and a wheel,
the wheel comprises a rim portion formed of a resin material, and
the at least part of the power receiving coil is contained inside the rim portion of the wheel in a tire radial direction.

12. The wireless power receiving system according to claim 2 , wherein the in-vehicle device includes a power storage device configured to store the electric power received from the power transmission device.

13. The wireless power receiving system according to claim 2 , wherein the at least one in-vehicle device is a plurality of in-vehicle devices, and the power receiving device transmits the electric power received from the power transmission device to at least one of the plurality of the in-vehicle devices based on a predetermined condition.

14. The wireless power receiving system according to claim 2 , wherein the power receiving device and the in-vehicle device are energizably connected by a wire.

15. The wireless power receiving system according to claim 2 , wherein the power receiving device and the in-vehicle device are energizably connected wirelessly.

16. The wireless power receiving system according to claim 2 , wherein the mobile object is able to perform autonomous driving.

17. The wireless power receiving system according to claim 2 , wherein at least part of a coil plane of the power receiving coil is opposite a ground surface, in contact with a road surface of the road, of the vehicle wheel.

18. The wireless power receiving system according to claim 1 further comprising:
a control device communicatively connected to the power receiving device, wherein
the control device is configured to control the power receiving device to transmit the electric power received from the power transmission device to the in-vehicle device and control the power receiving device to wirelessly transmit the electric power supplied from the in-vehicle device to the device installed on a road surface of the road.

19. The wireless power receiving system according to claim 8 further comprising:
a control device configured to control traveling of the mobile object based on a condition of an intensity of the electric power received by the power receiving device from the power transmission device.

20. The wireless power receiving system according to claim 16 further comprising:
a control device configured to control traveling of the mobile object based on a condition of an intensity of the electric power received by the power receiving device from the power transmission device.

Assignees

• Univ Tokyo
• Bridgestone Corp
• Nsk Ltd

Inventors

• Fujimoto Hiroshi
• Imura Takehiro
• Shimizu Osamu
• Hata Katsuhiro
• Akutagawa Keizo
• Wakao Yasumichi
• Kuwayama Isao
• Gunji Daisuke

Classifications

• H02J2105/30

  the load networks being external to vehicles, i.e. exchanging power with vehicles · CPC title

• B60L9/00

  Electric propulsion with power supply external to the vehicle (electric propulsion for monorail vehicles, suspension vehicles or rack railways B60L13/00; in combination with batteries or fuel cells within the vehicle B60L50/53) · CPC title

• B60K2007/0092

  the motor axle being coaxial to the wheel axle · CPC title

• B60K7/00

  Disposition of motor in, or adjacent to, traction wheel · CPC title

• B60K1/04

  of the electric storage means for propulsion · CPC title