Power reception device, vehicle including power reception device, and power transfer system

• US 9,721,722 B2
• Filed: 10/07/2011
• Issued: 08/01/2017
• Est. Priority Date: 10/07/2011
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ichikawa, Shinji
• Primary Examiner(s): Gannon, Levi
• Application Number:
  US14/349,129
• Publication Number:
  US 20140246901A1
• Time in Patent Office: 2,125 Days
• Field of Search: 307 91, 307 101, 307104
• CPC Class Codes: B60L 1/003 to auxiliary motors, e.g. for pumps, compressors
• CPC Class Codes: B60L 1/08 Methods and devices for control or regulation
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 2240/525 Temperature of converter or components thereof
• CPC Class Codes: B60L 5/005 without mechanical contact between the collector and the power supply line
• CPC Class Codes: B60L 53/12 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 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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 vehicle includes a power reception unit, a rectifier, a power line, and a cooling fan. The power reception unit of the vehicle is configured to receive, in a contactless manner, AC power output from a power transmission unit of a power transmission device. The rectifier rectifies the electric power received by the power reception unit. The electric power rectified by the rectifier is output through the power line. The cooling fan cools the power reception unit. The cooling fan is electrically connected to the power line, and operates with the electric power received from the power line.

Claims

1. A power reception device mounted on a vehicle and configured to receive electric power from a power transmission device in a contactless manner, said power reception device comprising:

a power reception unit configured to receive, in a contactless manner, AC power output from a power transmission unit of said power transmission device;

a power storage device configured to store electric power used for generating driving force of said vehicle;

a power line through which the electric power received by said power reception unit is output to said power storage device;

an electrical device configured to operate with the electric power received from said power line; and

a shield box configured to house said power reception unit and said electrical device, said shield box being different from a vehicle body of said vehicle, wherein

said electrical device is electrically connected to said power line within said shield box.

2. The power reception device according to claim 1, further comprising:

a rectification unit housed within said shield box, and configured to rectify the electric power received by said power reception unit; and

a voltage conversion unit configured to perform voltage conversion of the electric power rectified by said rectification unit, and configured to output the electric power to a load, wherein

said electrical device is electrically connected between said rectification unit and said voltage conversion unit.

3. A vehicle comprising the power reception device according to claim 2.

4. The power reception device according to claim 2, wherein

said electrical device includes a cooler configured to cool said power reception unit, and

said power reception device further comprises a voltage control unit configured to control said voltage conversion unit such that a voltage between said rectification unit and said voltage conversion unit is equal to a target voltage that is set to be higher as the electric power received by said power reception unit is larger.

5. A vehicle comprising the power reception device according to claim 4.

6. The power reception device according to claim 1, further comprising

a rectification unit configured to rectify the electric power received by said power reception unit, wherein

said electrical device is electrically connected between said power reception unit and said rectification unit.

7. A vehicle comprising the power reception device according to claim 6.

8. The power reception device according to claim 1, wherein

a difference between a natural frequency of said power reception unit and a natural frequency of said power transmission unit is equal to or less than ±

10% of the natural frequency of said power reception unit or the natural frequency of said power transmission unit.

9. A vehicle comprising the power reception device according to claim 8.

10. The power reception device according to claim 1, wherein

a coupling coefficient between said power reception unit and said power transmission unit is equal to or less than 0.1.

11. A vehicle comprising the power reception device according to claim 10.

12. The power reception device according to claim 1, wherein

said power reception unit receives electric power from said power transmission unit through at least one of a magnetic field formed between said power reception unit and said power transmission unit and oscillating at a specific frequency, and an electric field formed between said power reception unit and said power transmission unit and oscillating at a specific frequency.

13. A vehicle comprising the power reception device according to claim 12.

14. A vehicle comprising the power reception device according to claim 1.

15. The power reception device according to claim 1, wherein

said power storage device is disposed inside said vehicle body and outside said shield box.

16. A power transfer system configured to transfer electric power in a contactless manner from a power transmission device to a power reception device mounted on a vehicle,

said power transmission device comprising:

a power supply unit configured to generate AC power; and

a power transmission unit configured to output the AC power to said power reception device in a contactless manner, said AC power being supplied from said power supply unit, and

said power reception device comprising;

a power reception unit configured to receive, in a contactless manner, the AC power output from said power transmission unit;

a power storage device configured to store electric power used for generating driving force of said vehicle;

a power line through which the electric power received by said power reception unit is output to said power storage device;

an electrical device configured to operate with the electric power received from said power line; and

a shield box configured to house said power reception unit and said electrical device, said shield box being different from a vehicle body of said vehicle, wherein

said electrical device is electrically connected to said power line within said shield box.

17. The power transfer system according to claim 16, wherein

said power storage device is disposed inside said vehicle body and outside said shield box.