Non-contact electric power transmission system and charging station

• US 9,623,759 B2
• Filed: 12/23/2014
• Issued: 04/18/2017
• 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): WILLIAMS, ARUN C
• Application Number:
  US14/581,725
• Publication Number:
  US 20150217647A1
• Time in Patent Office: 847 Days
• Field of Search: 320108
• CPC Class Codes: B60L 2250/16 by display
• 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 53/35 Means for automatic or assisted adjustment of the relative position of charging devices and vehicles
• 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: B60L 53/66 Data transfer between charging stations and vehicles
• CPC Class Codes: B60L 53/67 Controlling two or more charging stations
• 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
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

A charging station includes a plurality of electric power transmission portions and a power supply ECU controlling electric power transmission from the plurality of electric power transmission portions. The power supply ECU performs pairing processing for determining a first electric power transmission portion after a vehicle completes positioning with respect to the first electric power transmission portion, checks whether or not positional relation between the first electric power transmission portion and a electric power reception portion of the vehicle satisfies an electric power reception condition after the pairing processing is performed and immediately before electric power transmission from the first electric power transmission portion to the vehicle is started, and allows the first electric power transmission portion to start electric power transmission to the vehicle when the positional relation satisfies the electric power reception condition.

Claims

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

a vehicle including an electric power reception portion; and

a charging station,

said charging station including

an electric power transmission portion configured to transmit electric power to the vehicle in a non-contact manner, and

an electric power transmission control unit that controls electric power transmission from said electric power transmission portion,

said electric power transmission control unit performing (i) pairing processing for determining said electric power transmission portion after said vehicle completes positioning with respect to said electric power transmission portion and is parked, (ii) checking whether a positional relation between said electric power transmission portion and said electric power reception portion of said vehicle satisfies an electric power reception condition after said pairing processing is performed and before electric power transmission from said electric power transmission portion to said vehicle is started, and (iii) allowing said electric power transmission portion to start electric power transmission to said vehicle when said positional relation satisfies said electric power reception condition.

2. The non-contact electric power transmission system according to claim 1, wherein

a plurality of said electric power transmission portions are provided in said charging station,

the electric power transmission portion with which said vehicle has completed positioning is a first electric power transmission portion of the plurality of electric power transmission portions,

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

said electric power transmission control unit allows electric power transmission with a time period for supply from said plurality of electric power transmission portions being different for each of the plurality of electric power transmission portions, upon reception of said first signal,

said vehicle transmits a second signal indicating said first electric power transmission portion to said electric power transmission control unit when a time period for supply of received electric power indicates said first electric power transmission portion, and

said electric power transmission control unit determines, based on said second signal, that the electric power transmission portion where the vehicle has stopped is said first electric power transmission portion.

3. The non-contact electric power transmission system according to claim 1, wherein

a plurality of said electric power transmission portions are provided in said charging station,

the electric power transmission portion with which said vehicle has completed positioning is a first electric power transmission portion of the plurality of electric power transmission portions,

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

said electric power transmission control unit allows electric power transmission with a number of times of switching between on and off of electric power transmission from said plurality of electric power transmission portions being different for each of the plurality of electric power transmission portions, upon reception of said first signal,

said vehicle transmits a third signal indicating said first electric power transmission portion to said electric power transmission control unit when the number of times of switching between on and off of received electric power indicates said first electric power transmission portion, and

said electric power transmission control unit determines, based on said third signal, that the electric power transmission portion where the vehicle has stopped is said first electric power transmission portion.

4. The non-contact electric power transmission system according to claim 1, wherein

said electric power transmission control unit controls said electric power transmission portion to transmit first electric power to perform the checking of whether the positional relation between said electric power transmission portion and said electric power reception portion satisfies the electric power reception condition, and controls said electric power transmission portion to start transmission of second electric power higher than said first electric power to said vehicle when a received voltage received by said electric power reception portion from said electric power transmission portion transmitting the first electric power is equal to or higher than a prescribed value.

5. A charging station, comprising:

an electric power transmission portion configured to transmit electric power to a vehicle in a non-contact manner; and

an electric power transmission control unit that controls electric power transmission from said electric power transmission portion,

said electric power transmission control unit performing (i) pairing processing for determining said electric power transmission portion after said vehicle completes positioning with respect to said electric power transmission portion and is parked, (ii) checking whether a positional relation between said electric power transmission portion and an electric power reception portion of said vehicle satisfies an electric power reception condition after said pairing processing is performed and before electric power transmission from said electric power transmission portion to said vehicle is started, and (iii) allowing said electric power transmission portion to start electric power transmission to said vehicle when said positional relation satisfies said electric power reception condition.