Non-contact power supply control device, non-contact power supply system, and non-contact power charge system

• US 9,184,633 B2
• Filed: 01/26/2012
• Issued: 11/10/2015
• Est. Priority Date: 02/03/2011
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Obayashi, Kazuyoshi, Tani, Keisuke
• Primary Examiner(s): Amaya, Carlos
• Application Number:
  US13/359,170
• Publication Number:
  US 20120200151A1
• Time in Patent Office: 1,384 Days
• Field of Search: 307/9.1, 307/11, 307/104
• US Class Current: 1/1
• CPC Class Codes: B60L 2210/12 Buck converters
• 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 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 53/31 Charging columns specially adapted for 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 53/39 with position-responsive activation of primary coils
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• 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 10/62 : 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

Abstract

A non-contact power supply control device controls power supply to transmit power in a non-contact manner from a ground-side power supply section provided outside a vehicle traveling using stored power to a vehicle-side power receiving section provided to the vehicle. A detection unit detects a living body at the periphery of the ground-side power supply section. A control unit restricts the power supply in a case where the detection unit detects the living body at the periphery of the ground-side power supply section during the power supply operation to the vehicle-side power receiving section.

Claims

1. A non-contact power supply device that performs a power transmission in a non-contact manner from a power transmitting section to a power receiving section, the device comprising:

an efficiency detecting unit that detects a transmission efficiency of power transmitted from the power transmitting section to the power receiving section;

a position detecting unit that detects a relative position between the power transmitting section and the power receiving section;

a reference value calculating unit that calculates a reference value of the transmission efficiency at the relative position using the relative position detected by the position detecting unit;

a control unit that controls the power transmission from the power transmitting section to the power receiving section,

the control unit controlling the power transmitting section so as to stop the power transmission when the transmission efficiency detected by the efficiency detecting unit during the power transmission is less than the reference value that is obtained by the reference value calculating unit; and

an electric energy calculating unit that calculates electric energy necessary for the power transmission from the power transmitting section to the power receiving section,

the reference value calculating unit calculating the reference value of the transmission efficiency at the relative position using the relative position and the calculated electric energy.

2. The non-contact power supply device according to claim 1, further comprising:

a determination unit that determines whether or not the position detecting unit is usable.

3. The non-contact power supply device according to claim 2, wherein the control unit controls the power transmitting section so as to stop the power transmission when the determination unit determines that the position detecting unit is not usable.

4. The non-contact power supply device according to claim 2, wherein the control unit controls the power transmission using the highest reference value when the determination unit determines that the position detecting unit is not usable and the power transmission is possible.

5. The non-contact power supply device according to claim 2, further comprising:

a determination informing unit that informs a determination result of the determination unit.

6. The non-contact power supply device according to claim 1, further comprising:

a power transmission informing unit that informs power transmission stoppage when the power transmission is stopped.

7. The non-contact power supply device according to claim 1, wherein the relative position includes a rotational angle of the power receiving section with respect to the power transmitting section, and the position detecting unit further detects the rotational angle.

8. The non-contact power supply device according to claim 1, wherein the relative position includes a tilt angle of the power receiving section with respect to the power transmitting section, and the position detecting unit further detects the tilt angle.

9. The non-contact power supply device according to claim 1, wherein the position detecting unit detects the relative position using a time taken for ultrasonic waves transmitted from a predetermined position to be received at a predetermined position.

10. The non-contact power supply device according to claim 1, wherein the position detecting unit images a mark provided at a predetermined position and detects the relative position using the position of the imaged mark.

11. The non-contact power supply device according to claim 1, wherein the position detecting unit emits infrared rays to a reflection section provided at a predetermined position and detects reflected waves from the reflection section to detect the relative position.