VEHICLE, POWER TRANSMISSION DEVICE, AND POWER FEEDING SYSTEM

• US 20150283909A1
• Filed: 12/11/2012
• Published: 10/08/2015
• Est. Priority Date: 12/11/2012
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ichikawa, Shinji, Inoue, Keisuke
• Granted Patent: US 10,787,085 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• 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 vehicle includes a power receiving unit and an RFID tag. The power receiving unit contactlessly receives electric power output from a power transmission unit. The RFID tag preliminarily stores information which is identification information for identifying the vehicle in the power transmission device and can be contactlessly read by the power transmission device. Here, the RFID tag is arranged at a vehicle body front end (a vehicle body trailing end) in a vehicle traveling direction when the vehicle is guided into a parking frame.

Claims

1. A vehicle which receives electric power from a power transmission device, the vehicle comprising:

a power receiving unit which contactlessly receives electric power output from said power transmission device; and

an ID tag which preliminarily stores information which is identification information for said power transmission device to identify said vehicle and can be contactlessly read by said power transmission device,

said ID tag being arranged at a vehicle body front end in a vehicle traveling direction of said vehicle being guided into a parking frame in which said vehicle receives electric power from said power transmission device.

2. The vehicle according to claim 1, further comprising another ID tag which is arranged at a vehicle body end on a side opposite to said ID tag in vehicle body forward and backward directions and preliminarily stores said identification information which can be contactlessly read by said power transmission device.

3. The vehicle according to claim 1, further comprising another ID tag which is arranged close to said power receiving unit and preliminarily stores said identification information which can be contactlessly read by said power transmission device.

4. The vehicle according to claim 3, wherein

said power receiving unit is provided at a vehicle body underneath part, and

said another ID tag is arranged close to said power receiving unit on a vehicle body end side having a larger distance among a distance from said power receiving unit to a vehicle body leading end and a distance from said power receiving unit to a vehicle body trailing end.

5. The vehicle according to claim 1, wherein said ID tag is arranged substantially at a center in vehicle body leftward and rightward directions.

6. The vehicle according to claim 1, further comprising:

a communication unit performing a wireless communication with said power transmission device,

when vehicle information indicated in said identification information read by said power transmission device corresponds to vehicle information indicated in information transmitted from said communication unit to said power transmission device, said vehicle is identified as a vehicle to be supplied with electric power from said power transmission device.

7. The vehicle according to claim 6, wherein a communicable distance between said ID tag and said power transmission device is smaller than a communicable distance between said communication unit and said power transmission device.

8. The vehicle according to claim 1, wherein a difference between a natural frequency of said power receiving unit and a natural frequency of a power transmission unit of said power transmission device is less than or equal to ±

10% of the natural frequency of said power receiving unit or the natural frequency of said power transmission unit.

9. The vehicle according to claim 1, wherein a coupling coefficient between said power receiving unit and a power transmission unit of said power transmission device is less than or equal to 0.3.

10. The vehicle according to claim 1, wherein

said power receiving unit receives electric power from said power transmission unit through at least one of a magnetic field and an electric field, said magnetic field being formed between said power receiving unit and a power transmission unit of said power transmission device, said electric field being formed between said power receiving unit and said power transmission unit, and

said magnetic field and said electric field are formed between said power receiving unit and said power transmission unit and oscillate at a particular frequency.

11. A power transmission device which supplies electric power to a vehicle, comprising:

a power transmission unit which contactlessly outputs electric power to said vehicle; and

a reading unit which contactlessly reads identification information from an ID tag, the ID tag preliminarily storing the identification information and being provided in said vehicle to identify said vehicle,

said reading unit being arranged in a parking frame and close to a vehicle entering end of said parking frame, electric power being supplied to said vehicle in said parking frame.

12. The power transmission device according to claim 11, further comprising:

another reading unit which is arranged close to said power transmission unit and contactlessly reads from said ID tag said identification information preliminarily stored in said ID tag.

13. A power feeding system which contactlessly supplies electric power from a power transmission device to a vehicle,

said vehicle including:

a power receiving unit which contactlessly receives electric power output from said power transmission device; and

an ID tag which preliminarily stores identification information for identifying the vehicle in said power transmission device,

said power transmission device including;

a power transmission unit which contactlessly outputs electric power to said power receiving unit; and

a reading unit which contactlessly reads said identification information from said ID tag,

said ID tag being arranged at a vehicle body front end in a vehicle traveling direction when said vehicle is guided into a parking frame in which electric power is supplied from said power transmission device to said vehicle.

14. The power feeding system according to claim 13, wherein said reading unit is arranged in said parking frame and close to a vehicle entering end of said parking frame.