NON-CONTACT POWER TRANSMISSION SYSTEM

• US 20130026848A1
• Filed: 01/26/2011
• Published: 01/31/2013
• Est. Priority Date: 01/26/2010
• Status: Abandoned Application

• Current Assignee: Equos Research Co., Ltd. (Aisin Corp.)
• Original Assignee: Equos Research Co., Ltd. (Aisin Corp.)
• Inventors: Ito, Yasuo
• Application Number:
  US13/574,276
• Publication Number:
  US 20130026848A1
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 50/40 using propulsion power supplied by capacitors
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• 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 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: H02J 50/12 of the resonant type
• 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: H02J 7/00712 the cycle being controlled or terminated in response to electric parameters
• 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 transmission system wherein, when transmitting power, it is possible to effectively perform non-contact power transmission by means of a series of power transmitting sequences which begins with recognizing and setting the power transmitting conditions, then with beginning the power transmission, and ends with completing the power transmission. Disclosed is a system for transmitting power in a non-contact manner to devices, such as vehicles, that use electric energy as the power source, which is provided with a power reception side antenna that is mounted on the device and that receives the power, and a transmission side antenna that sends power to the power reception side antenna.

Claims

1. A non-contact electricity transmission system that transmits electricity in a non-contact manner to a device that utilizes electric energy as a power source, the non-contact electricity transmission system comprising:

a reception-side antenna mounted on the device to receive electricity through electromagnetic coupling;

a transmission-side antenna that transmits electricity to the reception-side antenna through the electromagnetic coupling;

an AC power driver connected to the transmission-side antenna, the AC power driver being configured to supply AC power at a predetermined frequency during electricity transmission and to supply AC power while performing frequency scanning prior to the electricity transmission; and

a detection circuit that detects reflection characteristics of a system including the AC power driver and the transmission-side antenna and the reception-side antenna while the AC power driver is performing the frequency scanning, wherein

the predetermined frequency is defined as a resonance frequency at which the reflection characteristics detected by the detection circuit are brought into a resonant state.

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

the frequency scanning is performed after entry of the device into an electricity transmission enabling area of the transmission-side antenna is detected.

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

supply of electric power is started in the case where two resonance frequencies are detected by the detection circuit.

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

the AC power driver supplies low AC power during the frequency scanning compared to the AC power supplied during the electricity transmission.

5. The non-contact electricity transmission system according to claim 1, further comprising:

a switching circuit that switches connection of the reception-side antenna, wherein

the switching circuit switches the reception-side antenna to a closed loop including no load during the frequency scanning.

6. The non-contact electricity transmission system according to claim 5, wherein

the switching circuit switches the reception-side antenna to an open loop when electricity reception is terminated.

7. The non-contact electricity transmission system according to claim 6, wherein

the detection circuit further detects termination of the electricity reception with the reception-side antenna switched to the open loop when the reflection characteristics are brought out of the resonant state.

8. The non-contact electricity transmission system according to claim 1, further comprising:

an area entry detection sensor that detects entry of the device into the electricity transmission enabling area.