Contactless power supply device

• US 9,550,427 B2
• Filed: 03/30/2011
• Issued: 01/24/2017
• Est. Priority Date: 09/21/2010
• Status: Active Grant

• Current Assignee: Panasonic Automotive Systems Company of America (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: Takeshita, Toyoaki, Kimura, Kazuo
• Primary Examiner(s): Berhanu, Samuel
• Application Number:
  US13/824,900
• Publication Number:
  US 20130181667A1
• Time in Patent Office: 2,127 Days
• Field of Search: 320/108
• US Class Current: 1/1
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60M 7/003 for vehicles using stored power (e.g. charging stations)
• CPC Class Codes: H01F 27/02 Casings
• CPC Class Codes: H01F 27/025 Constructional details relating to cooling
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H04B 5/24 Inductive coupling
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• 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
• 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 contactless power supply device supplying electric power in a contactless manner to a power receiving device mounted on a moving object includes: a bottom plate structuring an installation face; a power transmitting coil disposed on the bottom plate to supply electric power to a power receiving coil included in the power receiving device; and a cover attached to the bottom plate so as to cover the power transmitting coil disposed on the bottom plate. A layer of air is formed between the power transmitting coil and the cover.

Claims

1. A contactless power supply device supplying electric power in a contactless manner to a power receiving device mounted on a moving object, comprising:

a bottom plate having an installation face;

a power transmitting coil which supplies electric power to a power receiving coil included in the power receiving device, the power transmitting coil being disposed on the bottom plate;

a cover attached to the bottom plate so as to cover the power transmitting coil; and

an electronic component which is disposed on the bottom plate, the electronic component being connected to the power transmitting coil,

wherein an air layer is formed between the power transmitting coil and the cover,

the cover further covers the electronic component,

the contactless power supply device further comprises a partition wall which divides a space surrounded by the bottom plate and the cover into a first storage space and a second storage space, the first storage space storing the power transmitting coil and the second storage space storing the electronic component,

a height of a second top face of the cover which corresponds to the second storage space with reference to the bottom plate is lower than a height of a first top face of the cover which corresponds to the first storage space with reference to the bottom plate, and

the partition wall has a thermal insulating characteristic such that Joule heat generated by the power transmitting coil is blocked by the partition wall so as to prevent Joule heat from being transferred to the electronic component.

2. The contactless power supply device according to claim 1, wherein a thermally conductive member higher in thermal conductivity than air is provided between the bottom plate and the power transmitting coil.

3. The contactless power supply device according to claim 2, wherein the thermally conductive member is formed of ceramic or resin.

4. The contactless power supply device according to claim 1, wherein a thermally insulating member lower in thermal conductivity than air is interposed into the air layer between the power transmitting coil and the cover.

5. The contactless power supply device according to claim 1, wherein the moving object is an electrically propelled vehicle.

6. The contactless power supply device according to claim 1, wherein the second storage space is provided to one of a front direction and a rear direction of the moving object with reference to the first storage space.

7. The contactless power supply device according to claim 1, wherein the partition wall is integrally formed with the cover so as to extend from the cover to the bottom plate.

8. The contactless power supply device according to claim 1, wherein the partition wall has a notch, the contactless power supply device further comprises a thermally insulating member which fits with the notch and that has a plurality of through holes, and

into the through holes, a lead wire connected to one end of the power transmitting coil and a lead wire connected to other end of the power transmitting coil are inserted.

13. The contactless power supply device according to claim 1, wherein the partition wall has a double structure having an air layer interposed.

15. The contactless power supply device according to claim 1, wherein the partition wall has the thermal insulating characteristic higher than a thermal insulating characteristic of the cover.

9. A contactless power supply device supplying electric power in a contactless manner to a power receiving device mounted on a moving object, comprising:

a bottom plate having an installation face;

a power transmitting coil which supplies electric power in the contactless manner to the power receiving device, the power transmitting coil being disposed on the bottom plate;

an electronic component which is disposed on the bottom plate, the electronic component being connected to the power transmitting coil; and

a cover attached to the bottom plate so as to cover the power transmitting coil and the electronic component,

wherein the contactless power supply device further comprises a partition wall which divides a space surrounded by the bottom plate and the cover into a first storage space and a second storage space, the first storage space storing the power transmitting coil and the second storage space storing the electronic component,

a height of a second top face of the cover which corresponds to the second storage space with reference to the bottom plate is lower than a height of a first top face of the cover which corresponds to the first storage space with reference to the bottom plate, and

the partition wall has a thermal insulating characteristic such that Joule heat generated by the power transmitting coil is blocked by the partition wall so as to prevent Joule heat from being transferred to the electronic component.

10. The contactless power supply device according to claim 9, wherein the second storage space is provided to one of a front direction and a rear direction of the moving object with reference to the first storage space.

11. The contactless power supply device according to claim 9, wherein the partition wall is integrally formed with the cover so as to extend from the cover to the bottom plate.

12. The contactless power supply device according to claim 9, wherein the partition wall has a notch, the contactless power supply device further comprises a thermally insulating member that fits with the notch and that has a plurality of through holes, and

into the through holes, a lead wire connected to one end of the power transmitting coil and a lead wire connected to other end of the power transmitting coil are inserted.

14. The contactless power supply device according to claim 9, wherein the partition wall has a double structure having an air layer interposed.

16. The contactless power supply device according to claim 9, wherein the partition wall has the thermal insulating characteristic higher than a thermal insulating characteristic of the cover.