Vehicle, power transmission device, and power feeding system

• US 10,787,085 B2
• Filed: 12/11/2012
• Issued: 09/29/2020
• 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
• Primary Examiner(s): Barnie, Rexford N
• Assistant Examiner(s): Chowdhuri, Swarna N
• Application Number:
  US14/439,065
• Publication Number:
  US 20150283909A1
• Time in Patent Office: 2,849 Days
• Field of Search: 307 101
• 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,

first, second and third ID tags, each of which preliminarily stores information which is identification information for said power transmission device to identify said vehicle and is contactlessly read by said power transmission device,

said first ID tag being arranged at a vehicle body leading end,

said second ID tag being arranged at a vehicle body trailing end,

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

said power receiving unit having a first side closest to said vehicle body leading end and a second side closest to said vehicle body trailing end, wherein a distance from said first side to the vehicle body leading end is a first distance and a distance from said second side to the vehicle body trailing end is a second distance,

said third ID tag being directly coupled to said power receiving unit on the first side when the first distance is greater than the second distance, and said third ID tag being directly coupled to said power receiving unit on the second side when the second distance is greater than the first distance.

2. The vehicle according to claim 1, wherein each of said first, second and third ID tags is arranged at a center in vehicle body leftward and rightward directions.

3. 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.

4. The vehicle according to claim 3, 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.

5. 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.

6. 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.

7. The vehicle according to claim 1, wherein said power receiving unit is a single power receiving unit that contactlessly receives all electrical power output from the power transmission device.