NON-CONTACT POWER RECEIVING APPARATUS AND VEHICLE HAVING THE SAME

• US 20120043172A1
• Filed: 05/14/2009
• Published: 02/23/2012
• Est. Priority Date: 05/14/2009
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ichikawa, Shinji
• Granted Patent: US 9,186,995 B2
• Time in Patent Office: Days
• US Class Current: 191/45.R
• 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 2220/14 Synchronous machines
• CPC Class Codes: B60L 5/005 without mechanical contact between the collector and the power supply line
• 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 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 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• 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 7/14 for vehicles propelled by ac motors
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• 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

Abstract

A non-contact power receiving apparatus includes a power reception coil receiving, by electromagnetic resonance, the electric power transmitted from a power transmission coil; a rectifier rectifying the electric power received by the power reception coil; coil, a load receiving the electric power rectified by the rectifier; a resistance and a connection switch provided in a pair of power lines for transmitting the electric power from the power reception coil through the rectifier to the load, the resistance and the connection switch being connected in series between the pair of power lines; and a control device. The control device renders the connection switch conductive when determining where the power reception coil is positioned, and renders the connection switch nonconductive when the electric power is transmitted to the load from the power reception coil through the rectifier.

Claims

1. A non-contact power receiving apparatus receiving electric power from a power transmission coil for transmitting the electric power received from a power supply, said non-contact power receiving apparatus comprising:

a power reception coil configured to receive, by non-contact power feeding, the electric power transmitted from said power transmission coil;

a rectifier configured to rectify the electric power received by said power reception coil;

a load disposed to receive the electric power rectified by said rectifier;

a resistance and a connection switch provided in a pair of power lines for transmitting the electric power from said power reception coil to said load, said resistance and said connection switch being connected in series between said pair of power lines; and

a control device for controlling said connection switch.

2. The non-contact power receiving apparatus according to claim 1, further comprising:

a motor for driving a vehicle; and

a power storage device for storing the electric power supplied to said motor, wherein

said load includes a charger for charging said power storage device, and

said resistance and said connection switch are disposed in a portion of said pair of power lines where said rectifier and said power storage device are connected to each other.

3. The non-contact power receiving apparatus according to claim 1, further comprising:

a motor for driving a vehicle;

a power storage device for storing the electric power supplied to said motor; and

a secondary coil capable of receiving the electric power from said power reception coil, wherein

said load includes a charger for charging said power storage device, and

said resistance and said connection switch are disposed in a portion of said pair of power lines where said rectifier and said secondary coil are connected to each other.

4. The non-contact power receiving apparatus according to claim 3, further comprising a voltage sensor for alternating-current peak detection for detecting a voltage arising across said resistance, wherein

said control device determines where said power reception coil is positioned based on a detection result of said voltage sensor.

5. The non-contact power receiving apparatus according to claim 1, wherein

said power supply and said power transmission coil are provided in a power feeding apparatus external to a vehicle, and

when receiving an instruction from a driver of said vehicle to supply the electric power, said control device renders said connection switch conductive to start test transmission of the electric power to said power feeding apparatus, and, based on a magnitude of a voltage arising across said resistance, determines whether said power reception coil is positioned with respect to said power transmission coil such that said power reception coil can receive the electric power.

6. The non-contact power receiving apparatus according to claim 5, wherein said control device determines a direction of the vehicle to be moved so as to position said power reception coil with respect to said power transmission coil such that said power reception coil can receive the electric power, while repeatedly determining whether said power reception coil is positioned with respect to said power transmission coil such that said power reception coil can receive the electric power.

7. The non-contact power receiving apparatus according to claim 1, wherein an impedance of said resistance is matched to the impedance of said power supply.

8. A vehicle equipped with the non-contact power receiving apparatus according to claim 1.

9. A vehicle equipped with the non-contact power receiving apparatus according to claim 2.

10. A vehicle equipped with the non-contact power receiving apparatus according to claim 3.

11. A vehicle equipped with the non-contact power receiving apparatus according to claim 4.

12. A vehicle equipped with the non-contact power receiving apparatus according to claim 5.

13. A vehicle equipped with the non-contact power receiving apparatus according to claim 6.

14. A vehicle equipped with the non-contact power receiving apparatus according to claim 7.

15. The non-contact power receiving apparatus according to claim 1, wherein

said control device renders said connection switch conductive in determining where said power reception coil is positioned, and renders said connection switch nonconductive when the electric power is transmitted to said load from said power reception coil through said rectifier.