Power supply system and method of controlling power supply system

• US 8,178,995 B2
• Filed: 10/13/2009
• Issued: 05/15/2012
• 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: Amano, Yasushi, Ichikawa, Shinji
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): Fauth, Justen
• Application Number:
  US12/588,354
• Publication Number:
  US 20100123452A1
• Time in Patent Office: 945 Days
• Field of Search: None
• US Class Current: 307/9.1
• 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 that is supplied with power from a power supply unit;

a power supply-side resonance coil that is supplied with power from the power supply coil in a non-contact manner;

a power receiving-side resonance coil that is supplied with power from the power supply-side resonance coil in a non-contact manner;

a power receiving coil that is supplied with power from the power receiving-side resonance coil in a non-contact manner; and

an adjustment unit that adjusts at least one of 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.

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

the adjustment unit adjusts the at least one of the distance between the power supply coil and the power supply-side resonance coil and the distance between the power receiving coil and the power receiving-side resonance coil so as to increase a power supply efficiency.

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

the adjustment unit adjusts at least one of the distance between the power supply coil and the power supply-side resonance coil and the distance between the power receiving coil and the power receiving-side resonance coil so that at least one of a power supply-side distance ratio and a power receiving-side distance ratio falls within a predetermined range,

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 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.

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

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

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

the adjustment unit adjusts at least one of 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 the distance between the power supply-side resonance coil and the power receiving-side resonance coil.

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

the adjustment unit adjusts at least one of 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 the 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 at least one of 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 the 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 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, a coil radius of the power supply coil with respect to the power supply-side resonance coil, 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 the distance between the power supply-side resonance coil and the power receiving-side resonance coil.

9. A power supply system comprising:

a power supply coil that is supplied with power from a power supply unit;

a power supply-side resonance coil that is supplied with power from the power supply coil in a non-contact manner;

a power receiving-side resonance coil that is supplied with power from the power supply-side resonance coil in a non-contact manner;

a power receiving coil that is supplied with power from the power receiving-side resonance coil in a non-contact manner; and

an adjustment unit that makes shorter at least one of 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 when a distance between the power supply-side resonance coil and the power receiving-side resonance coil is short, as compared to when the distance between the power supply side-side resonance coil and the power receiving-side resonance coil is long.

10. A power receiving device comprising:

a power receiving-side resonance coil that is supplied with power from a power supply-side resonance coil at a power supply device in a non-contact manner;

a power receiving coil that is supplied with power from the power receiving-side resonance coil in a non-contact manner; and

an adjustment unit that adjusts 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.

11. A power receiving device comprising:

a power receiving-side resonance coil that is supplied with power from a power supply-side resonance coil at a power supply device in a non-contact manner;

a power receiving coil that is supplied with power from the power receiving-side resonance coil in a non-contact manner; and

an adjustment unit that makes shorter a distance between the power receiving coil and the power receiving-side resonance coil when a distance between the power supply-side resonance coil and the power receiving-side resonance coil is short, as compared to when the distance between the power supply side-side resonance coil and the power receiving-side resonance coil is long.

12. A power supply device comprising:

a power supply coil that is supplied with power from a power supply unit;

a power supply-side resonance coil that is supplied with power from the power supply coil in a non-contact manner and supplies power to a power receiving-side resonance coil at a receiving device in a non-contact manner; and

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

13. A power supply device comprising:

a power supply coil that is supplied with power from a power supply unit;

a power supply-side resonance coil that is supplied with power from the power supply coil in a non-contact manner and supplies power to a power receiving-side resonance coil at a receiving device in a non-contact manner; and

an adjustment unit that makes shorter a distance between the power supply coil and the power supply-side resonance coil when a distance between the power supply-side resonance coil and the power receiving-side resonance coil is short, as compared to when the distance between the power supply-side resonance coil and the power receiving-side resonance coil is long.

14. A method of controlling a power supply system comprising:

supplying power to a power supply coil from a power unit;

supplying power to a power supply-side resonance coil from the power supply coil in a non-contact manner;

supplying power to a power receiving-side resonance coil from the power supply-side resonance coil in a non-contact manner;

supplying power to a power receiving coil from the power receiving-side resonance coil in a non-contact manner; and

adjusting at least one of 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.

15. The method of controlling the power system according to claim 14, wherein the adjusting includes making shorter the at least one of the distance between the power supply coil and the power supply-side resonance coil and the distance between the power receiving coil and the power receiving-side resonance coil when the distance between the power supply-side resonance coil and the power receiving-side resonance coil is short, as compared to when the distance between the power supply side-side resonance coil and the power receiving-side resonance coil is long.