POWER RECEIVING DEVICE, PARKING ASSIST SYSTEM, AND POWER TRANSFER SYSTEM

• US 20160082848A1
• Filed: 04/24/2014
• Published: 03/24/2016
• Est. Priority Date: 04/26/2013
• Status: Abandoned Application

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: ICHIKAWA, Shinji, YAMADA, Hideaki
• Application Number:
  US14/787,178
• Publication Number:
  US 20160082848A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 2210/14 Boost converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2250/10 by alarm
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• CPC Class Codes: B60L 50/66 Arrangements of batteries
• 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 53/124 Detection or removal of foreign bodies
• 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 53/305 Communication interfaces
• CPC Class Codes: B60L 53/36 by positioning the vehicle
• CPC Class Codes: B60L 53/37 using optical position determination, e.g. using cameras
• CPC Class Codes: B60L 53/38 specially adapted for charging by inductive energy transfer
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60L 58/21 having the same nominal voltage
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• 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 10/72 : Electric energy management in electromobility
• 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
• CPC Class Codes: Y02T 90/167 : Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing
• CPC Class Codes: Y10S 903/903 : having energy storing means, e.g. battery, capacitor

Abstract

A power receiving device for a vehicle includes a power receiving unit and at least one detector. The power receiving unit is configured to contactlessly receive electric power from a power transmitting unit. The detector is configured to detect a strength of a magnetic field or electric field that is formed by the power transmitting unit. The detector is provided on a body of the vehicle separately from the power receiving unit. The detector is arranged in a first position or a second position. The first position is contained in a projected space that is formed when an image of the power receiving unit arranged at the power receiving position is projected upward in a vertical direction. The second position is located around the power receiving unit when the power receiving unit arranged at the power receiving position is viewed in plan in the vertical direction.

Claims

1. A power receiving device for a vehicle, the power receiving device comprising:

a power receiving unit including a power receiving coil, the power receiving unit being configured to move between a retracted position and a power receiving position, the power receiving unit being configured to contactlessly receive electric power from a power transmitting unit provided outside the vehicle in a state where the power receiving unit is arranged at the power receiving position; and

at least one detector configured to detect a strength of a magnetic field or electric field that is formed by the power transmitting unit, the detector being provided on a body of the vehicle separately from the power receiving unit, the detector being arranged in a first position or a second position, the first position being contained in a projected space that is formed when an image of the power receiving unit arranged at the power receiving position is projected upward in a vertical direction, the second position being located around the power receiving unit when the power receiving unit arranged at the power receiving position is viewed in plan in the vertical direction,

wherein a winding axis of the power receiving coil extends in a second direction that intersects with a first direction that is a direction in which the power receiving coil faces the power transmitting unit,

wherein the detector is arranged on a vehicle rear side with respect to a fuel tank when the detector is viewed in plan in the vertical direction.

11. The power receiving device according to claim 1, wherein a difference between a natural frequency of the power transmitting unit and a natural frequency of the power receiving unit is smaller than or equal to 10% of the natural frequency of the power receiving unit.

12. The power receiving device according to claim 1, wherein a coupling coefficient between the power receiving unit and the power transmitting unit is smaller than or equal to 0.3.

13. The power receiving device according to claim 1, wherein the power receiving unit is configured to receive electric power from the power transmitting unit via at least one of a magnetic field that is formed between the power receiving unit and the power transmitting unit and that oscillates at a predetermined frequency and an electric field that is formed between the power receiving unit and the power transmitting unit and that oscillates at a predetermined frequency.

14. A parking assist system for a vehicle, the parking assist system comprising:

the power receiving device according to claim 1;

a vehicle drive unit configured to drive the vehicle; and

a controller configured to move the vehicle by controlling the vehicle drive unit on the basis of the strength of the magnetic field, detected by the detector.

2-10. -10. (canceled)

15-17. -17. (canceled)