Power supply system and method of controlling power supply system

• US 20100123452A1
• Filed: 10/13/2009
• Published: 05/20/2010
• Est. Priority Date: 11/17/2008
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ichikawa, Shinji, Amano, Yasushi
• Granted Patent: US 8,178,995 B2
• Time in Patent Office: Days
• US Class Current: 323/359
• 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 53/38 specially adapted for charging by inductive energy transfer
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• 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 7/0049 Detection of fully charged condition
• 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 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A power supply system that includes: a power supply coil and a power supply-side resonance coil that are provided at a facility; a power receiving coil and a power receiving-side resonance coil that are provided for a mobile unit; a power supply-side detection unit that detects a position of the power supply-side resonance coil; a power receiving-side detection unit that detects a position of the power receiving-side resonance coil; and an adjustment unit that adjusts a relative position of the power supply coil with respect to the power supply-side resonance coil and a relative position of the power receiving coil with respect to the power receiving-side resonance coil on the basis of the position of the power supply-side resonance coil and the position of the power receiving-side resonance coil.

Claims

1. A power supply system comprising:

a power supply coil and a power supply-side resonance coil that are provided at a facility;

a power receiving coil and a power receiving-side resonance coil that are provided for a mobile unit;

a power supply-side detection unit that detects a position of the power supply-side resonance coil;

a power receiving-side detection unit that detects a position of the power receiving-side resonance coil; and

an adjustment unit that adjusts a relative position of the power supply coil with respect to the power supply-side resonance coil and a relative position of the power receiving coil with respect to the power receiving-side resonance coil on the basis of the position of the power supply-side resonance coil and the position of the power receiving-side resonance coil.

2. The power supply system according to claim 1, wherein

the adjustment unit adjusts a distance between the power supply coil and the power supply-side resonance coil and a distance between the power receiving coil and the power receiving-side resonance coil on the basis of a distance between the power supply-side resonance coil and the power receiving-side resonance coil.

3. The power supply system according to claim 1, wherein

the adjustment unit adjusts a distance between the power supply coil and the power supply-side resonance coil so as to maximize a power supply efficiency, and adjusts a distance between the power receiving coil and the power receiving-side resonance coil so as to maximize a power supply efficiency.

4. The power supply system according to claim 1, wherein

the adjustment unit adjusts a relative position between the power supply coil and the power supply-side resonance coil so that a power supply-side distance ratio falls within a predetermined range, wherein the power supply-side distance ratio is a ratio of a distance between the power supply coil and the power supply-side resonance coil to a distance between the power supply-side resonance coil and the power receiving-side resonance coil, and

the adjustment unit adjusts a relative position between the power receiving coil and the power receiving-side resonance coil so that a power receiving-side distance ratio falls within a predetermined range, wherein the power receiving-side distance ratio is a ratio of a distance between the power receiving coil and the power receiving-side resonance coil to a distance between the power supply-side resonance coil and the power receiving-side resonance coil.

5. The power supply system according to claim 4, wherein

the adjustment unit adjusts the power supply-side distance ratio and the power receiving-side distance ratio so as to maximize a power supply efficiency.

6. The power supply system according to claim 1, wherein

the adjustment unit adjusts an amount of deviation in coil axis between the power supply coil and the power supply-side resonance coil and an amount of deviation in coil axis between the power receiving coil and the power receiving-side resonance coil on the basis of a distance between the power supply-side resonance coil and the power receiving-side resonance coil.

7. The power supply system according to claim 1, wherein

the adjustment unit adjusts an angle made between the power supply coil and the power supply-side resonance coil and an angle made between the power receiving coil and the power receiving-side resonance coil on the basis of a distance between the power supply-side resonance coil and the power receiving-side resonance coil.

8. The power supply system according to claim 1, wherein

the adjustment unit adjusts a coil radius of the power supply coil with respect to the power supply-side resonance coil and a coil radius of the power receiving coil with respect to the power receiving-side resonance coil on the basis of a distance between the power supply-side resonance coil and the power receiving-side resonance coil.

9. The power supply system according to claim 1, wherein

the adjustment unit adjusts any one of a distance between the power supply coil and the power supply-side resonance coil, an amount of deviation in coil axis between the power supply coil and the power supply-side resonance coil, an angle made between the power supply coil and the power supply-side resonance coil or a coil radius of the power supply coil with respect to the power supply-side resonance coil and adjusts any one of a distance between the power receiving coil and the power receiving-side resonance coil, an amount of deviation in coil axis between the power receiving coil and the power receiving-side resonance coil, an angle made between the power receiving coil and the power receiving-side resonance coil or a coil radius of the power receiving coil with respect to the power receiving-side resonance coil on the basis of a distance between the power supply-side resonance coil and the power receiving-side resonance coil.

10. A power supply system comprising:

a power supply coil and a power supply-side resonance coil that are provided at a facility;

a power receiving coil and a power receiving-side resonance coil that are provided for a mobile unit;

a power supply efficiency detection unit that detects a power supply efficiency that indicates a transmission efficiency of electric power; and

an adjustment unit that, after the mobile unit stops around the facility, changes a relative position between the power supply coil and the power supply-side resonance coil and a relative position between the power receiving coil and the power receiving-side resonance coil within a predetermined range, and that adjusts the relative positions within the predetermined range so as to substantially maximize the power supply efficiency detected by the power supply efficiency detection unit.

11. A method of controlling a power supply system that includes a power supply coil and a power supply-side resonance coil that are provided at a facility;

and a power receiving coil and a power receiving-side resonance coil that are provided for a mobile unit, the method comprising;

detecting a position of the power supply-side resonance coil;

detecting a position of the power receiving-side resonance coil; and

adjusting a relative position of the power supply coil with respect to the power supply-side resonance coil and a relative position of the power receiving coil with respect to the power receiving-side resonance coil on the basis of the position of the power supply-side resonance coil and the position of the power receiving-side resonance coil.

12. A method of controlling a power supply system that includes a power supply coil and a power supply-side resonance coil that are provided at a facility;

and a power receiving coil and a power receiving-side resonance coil that are provided for a mobile unit, the method comprising;

detecting a power supply efficiency that indicates a transmission efficiency of electric power; and

after the mobile unit stops around the facility, adjusting a relative position between the power supply coil and the power supply-side resonance coil and a relative position between the power receiving coil and the power receiving-side resonance coil within a predetermined range so as to substantially maximize the power supply efficiency.