Parking assist system for vehicle, contactless power transmitting device, and contactless power receiving device

• US 9,409,491 B2
• Filed: 10/29/2013
• Issued: 08/09/2016
• Est. Priority Date: 10/31/2012
• Status: Active Grant

• Current Assignee: Tohoku University National Universities Corporation, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Tohoku University National Universities Corporation, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Komatsu, Masayuki, Yamaguchi, Hiroto, Ichikawa, Shinji, Matsuki, Hidetoshi, Sato, Fumihiro, Takura, Tetsuya
• Primary Examiner(s): Black, Thomas G
• Assistant Examiner(s): THOMAS, ANA D
• Application Number:
  US14/438,356
• Publication Number:
  US 20150291048A1
• Time in Patent Office: 1,015 Days
• US Class Current: 1/1
• CPC Class Codes: B60L 3/106 for maintaining or recovering the adhesion of the drive wheels
• 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: B60L 53/38 specially adapted for charging by inductive energy transfer
• 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 parking assist system for a vehicle includes a target position setting unit setting a vehicle target parking position on the basis of a coil type and position of a power transmitting unit. When the coil type is a composite coil having a configuration such that an annular coil wound to surround a first axis and a solenoid coil wound to surround a second axis intersecting with the first axis are serially connected, the target position setting unit sets the target parking position such that a center of a power receiving unit mounted on the vehicle is located at a predetermined distance from the first axis along the second axis. The solenoid coil is set at a position with respect to the annular coil such that the first axis extends through a side face center portion of the solenoid coil.

Claims

1. A parking assist system for a vehicle configured to contactlessly receive electric power,

the parking assist system comprising:

a detector configured to detect a coil type of a power transmitting portion of a power supply device installed at a parking lot; and

an electronic control unit configured to set a target parking position of the vehicle based on the coil type of the power transmitting portion and a position of the power transmitting portion,

the electronic control unit being configured to set the target parking position such that a center of a power receiving portion mounted on the vehicle is located at a predetermined distance from a first axis along a second axis that intersects with the first axis, when the coil type detected by the detector is a composite coil having a configuration such that an annular coil and a solenoid coil are connected in series with each other, the annular coil being wound to surround the first axis, the solenoid coil being located with respect to the annular coil such that the first axis extends through a side face center portion of the solenoid coil, and the solenoid coil being wound to surround the second axis.

2. The parking assist system for the vehicle according to claim 1, wherein a coil type of the power receiving portion mounted on the vehicle is one of an annular coil and a solenoid coil.

3. The parking assist system for the vehicle according to claim 1, wherein the predetermined distance is shorter than or equal to a distance from the side face center portion of the solenoid coil to a side face end portion of the solenoid coil.

4. The parking assist system for the vehicle according to claim 1, wherein:

the solenoid coil has a configuration such that a conductive wire is wound around a flat sheet magnetic material, and

the solenoid coil is located with respect to the annular coil such that the first axis extends through a center portion of the flat sheet in the composite coil.

5. The parking assist system for the vehicle according to claim 1, wherein a difference between a natural frequency of the power transmitting portion and a natural frequency of the power receiving portion falls within a range of ±

10%.

6. The parking assist system for the vehicle according to claim 1, wherein the power receiving portion is configured to receive electric power from the power transmitting portion through at least one of a magnetic field and an electric field, the magnetic field being formed between the power receiving portion and the power transmitting portion, the magnetic field oscillating at a predetermined frequency, the electric field being formed between the power receiving portion and the power transmitting portion, and the electric field oscillating at a predetermined frequency.

7. A parking assist system for a vehicle,

the parking assist system comprising:

a power receiving portion included in the vehicle and configured to contactlessly receive electric power, the power receiving portion including a composite coil having a configuration such that an annular coil and a solenoid coil are connected in series with each other, the annular coil being wound to surround a first axis, the solenoid coil being located with respect to the annular coil such that the first axis extends through a side face center portion, and the solenoid coil being wound to surround a second axis that intersects with the first axis; and

the parking assist system comprises a electronic control unit configured to set a target parking position of the vehicle based on a position of a power transmitting portion of a power supply device installed at a parking lot; and

the electronic control unit being configured to set the target parking position such that a center of the power transmitting portion is located at a predetermined distance from the first axis along the second axis.

8. The parking assist system for the vehicle according to claim 7, wherein a coil type of the power transmitting portion is one of an annular coil and a solenoid coil.

9. The parking assist system for the vehicle according to claim 7, wherein the predetermined distance is shorter than or equal to a distance from the side face center portion of the solenoid coil to a side face end portion of the solenoid coil.

10. The parking assist system for the vehicle according to claim 7, wherein:

the solenoid coil has a configuration such that a conductive wire is wound around a flat sheet magnetic material, and

the solenoid coil is located with respect to the annular coil such that the first axis extends through a center portion of the flat sheet in the composite coil.

11. The parking assist system for the vehicle according to claim 7, wherein a difference between a natural frequency of a power transmitting portion and a natural frequency of the power receiving portion falls within a range of ±

10%.

12. The parking assist system for the vehicle according to claim 7, wherein the power receiving portion receives electric power from the power transmitting portion through at least one of a magnetic field and an electric field, the magnetic field being formed between the power receiving portion and the power transmitting portion, the magnetic field oscillating at a predetermined frequency, the electric field being formed between the power receiving portion and the power transmitting portion, and the electric field oscillating at a predetermined frequency.