Non-contact electric power transmission system and charging station

• US 9,637,015 B2
• Filed: 12/24/2014
• Issued: 05/02/2017
• Est. Priority Date: 01/31/2014
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ichikawa, Shinji, Taniguchi, Satoshi
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): Omar, Ahmed
• Application Number:
  US14/582,832
• Publication Number:
  US 20150217649A1
• Time in Patent Office: 860 Days
• Field of Search: 320108
• 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: B60L 53/39 with position-responsive activation of primary coils
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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: 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

When a power supply ECU receives a signal requesting test electric power transmission, the power supply ECU has a plurality of electric power transmission portions start transmission of electric power for positioning, and determines an electric power transmission portion with which a vehicle is carrying out positioning based on which of a plurality of detection portions has detected effective electric power. The vehicle transmits a first signal to a charging station when positioning is completed. When the power supply ECU receives the first signal and it is determined that the vehicle has stopped at the electric power transmission portion which is the subject of electric power transmission, the power supply ECU has the electric power transmission portion which is the subject of electric power transmission transmit electric power higher than electric power for positioning.

Claims

1. A non-contact electric power transmission system, comprising:

a vehicle; and

a charging station,

said charging station including

a plurality of electric power transmission portions, and

an electric power transmission control unit controlling electric power transmission from said plurality of electric power transmission portions,

said charging station broadcasting beacons,

said vehicle transmitting a request signal after receiving said beacons,

said electric power transmission control unit having said plurality of electric power transmission portions start transmission of transmission electric power for positioning after reception of said request signal,

said vehicle transmitting a first signal to said charging station when positioning with respect to an electric power transmission portion is completed,

said electric power transmission control unit having said plurality of electric power transmission portions carry out electric power transmission which is set with a duration being differed for each of said plurality of electric power transmission portions, after reception of said first signal,

said vehicle transmitting a second signal corresponding to the received duration to said charging station,

said electric power transmission control unit determining the transmission portion that said vehicle has stopped, based on said second signal, and

said electric power transmission control unit having the transmission portion that determined as said vehicle has stopped carry out electric power transmission.

2. A non-contact electric power transmission system comprising:

a vehicle; and

a charging station,

said charging station including

a plurality of electric power transmission portions, and

an electric power transmission control unit controlling electric power transmission from said plurality of electric power transmission portions,

said charging station broadcasting beacons,

said vehicle transmitting a request signal after receiving said beacons,

said electric power transmission control unit having said plurality of electric power transmission portions start transmission of transmission electric power or positioning after reception of said request signal,

said vehicle transmitting a first signal to said charging station when positioning with respect to an electric power transmission portion is completed,

said electric power transmission control unit having said plurality of electric power transmission portions carry out electric power transmission which is set with the number of times of switching between on and off being differed for each of said plurality of electric power transmission portions, upon reception of said first signal,

said vehicle transmitting a third signal corresponding to the received number of times of switching to said charging station,

said electric power transmission control unit determining the transmission portion that said vehicle has stopped, based on said third signal, and

said electric power transmission control unit having the transmission portion that determined as said vehicle has stopped carry out electric power transmission.

3. A charging station which feeds electric power to a vehicle in a non-contact manner, comprising:

a plurality of electric power transmission portions; and

an electric power transmission control unit controlling electric power transmission from said plurality of electric power transmission portions,

said charging station broadcasting beacons,

said electric power transmission control unit having said plurality of electric power transmission portions start transmission of transmission electric power for positioning after reception of a request signal from the vehicle,

said vehicle transmitting a first signal to said charging station when positioning with respect to an electric power transmission portion,

said electric power transmission control unit having said plurality of electric power transmission portions carry out electric power transmission which is set with a duration being differed for each of said plurality of electric power transmission portions, after reception of said first signal,

said vehicle transmitting a second signal corresponding to the received duration to said charging station,

said electric power transmission control unit determining the transmission portion that said vehicle has stopped, based on said second signal, and

said electric power transmission control unit having the transmission portion that determined as said vehicle has stopped carry out electric power transmission.

4. A charging station which feeds electric power to a vehicle in a non-contact manner, comprising:

a plurality of electric power transmission portions; and

an electric power transmission control unit controlling electric power transmission from said plurality of electric power transmission portions,

said charging station broadcasting beacons,

said electric power transmission control unit having said plurality of electric power transmission portions start transmission of transmission electric power for positioning after reception of a request signal from said vehicle,

said vehicle transmitting a first signal to said charging station when positioning with respect to an electric power transmission portion,

said electric power transmission control unit having said plurality of electric power transmission portions carry out electric power transmission which is set with the number of times of switching between on and off being differed for each of said plurality of electric power transmission portions, upon reception of said first signal,

said vehicle transmitting a third signal corresponding to the received number of times of switching to said charging station,

said electric power transmission control unit determining the transmission portion that said vehicle has stopped, based on said third signal, and

said electric power transmission control unit having the transmission portion that determined as said vehicle has stopped carry out electric power transmission.