Contactless power transmitting device, contactless power receiving device, and contactless electric power transfer system

• US 10,411,522 B2
• Filed: 02/22/2012
• Issued: 09/10/2019
• Est. Priority Date: 02/22/2012
• 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): Fleming, Fritz M
• Assistant Examiner(s): Dhillon, Jagdeep S
• Application Number:
  US14/379,641
• Publication Number:
  US 20150015084A1
• Time in Patent Office: 2,757 Days
• Field of Search: 307104, 307149, 307 91, 307 101, 307 102, 307108, 345204, 345205, 345206, 345210, 290 43, 290 42, 290 44, 290 46
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• 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 53/305 Communication interfaces
• CPC Class Codes: B60L 53/31 Charging columns specially adapted for electric vehicles
• CPC Class Codes: B60L 53/36 by positioning the vehicle
• CPC Class Codes: B60L 53/38 specially adapted for charging by inductive energy transfer
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60L 53/665 Methods related to measuring, billing or payment
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/72 for local intradevice communication
• 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 transmitting device is capable of contactlessly transmitting power to a power receiving device. The contactless power transmitting device includes a power transmitting unit configured to be capable of contactlessly transmitting power to the power receiving device, and a communication unit configured to send information, which relates to a magnetic flux distribution of the power transmitting unit during power transmission, to the power receiving device.

Claims

1. A contactless power transmitting device capable of contactlessly transmitting power to a power receiving device, the contactless power transmitting device comprising:

a power transmitting unit configured to contactlessly transmit power to the power receiving device; and

a communication unit configured to send information of the power transmitting unit, before all power transmission, to the power receiving device for identifying a compatibility of the power transmitting unit and the power receiving device, wherein the information sent by the communication unit to the power receiving device includes a coil type of the power transmitting unit, and wherein a coil compatibility is determined based on the coil type before all power transmission.

2. The contactless power transmitting device according to claim 1, wherein the information is used to determine whether or not the power receiving device is to receive electric power from the contactless power transmitting device.

3. The contactless power transmitting device according to claim 2, wherein the communication unit is configured to send the information before the power transmitting unit starts transmitting power to the power receiving device.

4. The contactless power transmitting device according to claim 1, wherein the information includes at least one of information (i) and information (ii), which affects a magnetic flux distribution occurring in the power transmitting unit during power transmission:

(i) the information relating to a structure of a part constituting the power transmitting unit, and

(ii) the information relating to a parameter of the power transmitting unit.

5. A contactless power transmitting device capable of contactlessly transmitting power to a power receiving device, the contactless power transmitting device comprising:

a power transmitting unit configured to contactlessly transmit power to the power receiving device;

a communication unit configured to send information of the power transmitting unit, before all power transmission, to the power receiving device for identifying a compatibility of the power transmitting unit and the power receiving device, wherein the information sent by the communication unit to the power receiving device includes a coil type of the power transmitting unit, and wherein a coil compatibility is determined based on the coil type before all power transmission; and

an adjustment device configured to adjust a magnetic flux distribution of the power transmitting unit during power transmission.

6. The contactless power transmitting device according to claim 5, further comprising a control unit configured to control the adjustment device based on information relating to the power receiving device, such that a magnetic flux distribution of the power transmitting unit during power transmission becomes compatible with the power receiving device.

7. A contactless power receiving device capable of contactlessly receiving power from a power transmitting device, the contactless power receiving device comprising:

a power receiving unit configured to contactlessly receive power from the power transmitting device; and

a communication unit configured to send information of the power receiving unit, before all power reception, to the power transmitting device for identifying a compatibility of the power transmitting device and the power receiving unit, wherein the information sent by the communication unit to the power transmitting device includes a coil type of the power receiving unit, and wherein a coil compatibility is determined based on the coil type before all power reception.

8. The contactless power receiving device according to claim 7, wherein the information is used to determine whether or not the power transmitting device is to transmit power to the contactless power receiving device.

9. The contactless power receiving device according to claim 8, wherein the communication unit is configured to send the information before the power receiving unit starts receiving electric power from the power transmitting device.

10. The contactless power receiving device according to claim 7, wherein the information includes at least one of information (i) and information (ii), which affects a magnetic flux distribution that is to occur in the power receiving unit during power transmission:

(i) the information relating to a structure of a part constituting the power receiving unit, and

(ii) the information relating to a parameter of the power receiving unit.

11. A contactless power receiving device capable of contactlessly receiving power from a power transmitting device, the contactless power receiving device comprising:

a power receiving unit configured to contactlessly receive power from the power transmitting device;

a communication unit configured to send information of the power receiving unit, before all power reception, to the power transmitting device for identifying a compatibility of the power transmitting device and the power receiving unit, wherein the information sent by the communication unit to the power transmitting device includes a coil type of the power receiving unit, and wherein a coil compatibility is determined based on the coil type before all power reception; and

an adjustment device configured to adjust a magnetic flux distribution suitable for the power receiving unit during power reception.

12. The contactless power receiving device according to claim 11, further comprising a control unit configured to control the adjustment device based on information relating to the power transmitting device, such that a magnetic flux distribution suitable for the power receiving unit during power reception becomes compatible with the power transmitting device.

13. A contactless power transfer system comprising:

a power receiving device; and

a power transmitting device configured to contactlessly transmit power to the power receiving device, wherein

the power transmitting device comprises;

a power transmitting unit configured to contactlessly transmit power to the power receiving device; and

a communication unit configured to send information of the power transmitting unit, before all power transmission, to the power receiving device for identifying a compatibility of the power transmitting unit and the power receiving device, wherein the information sent by the communication unit to the power receiving device includes a coil type of the power transmitting unit, and wherein a coil compatibility is determined based on the coil type before all power transmission.

14. A contactless power transfer system comprising:

a power transmitting device; and

a power receiving device configured to contactlessly receive power from the power transmitting device, wherein

the power receiving device comprises;

a power receiving unit configured to contactlessly receive power from the power transmitting device; and

a communication unit configured to send information of the power receiving unit, before all power reception, to the power transmitting device for identifying a compatibility of the power transmitting device and the power receiving unit, wherein the information sent by the communication unit to the power transmitting device includes a coil type the power receiving unit, and wherein a coil compatibility is determined based on the coil type before all power reception.

15. A method of contactlessly transmitting power to a power receiving device using a power transmitting unit, comprising:

monitoring whether a charging request has been made by the power receiving device; and

sending information, using a communication unit, from the power transmitting unit to the power receiving device before all power transmission, the information including a coil type of the power transmitting unit; and

based on the coil type, determining whether the power transmitting unit and the power receiving device are compatible before power transmission.

16. A method of contactlessly receiving power from a contactless power transmitting device to a power receiving device having a power receiving unit, comprising:

monitoring whether a charging request has been made by the contactless power transmitting device;

sending information, using a communication unit, from the power receiving unit to the contactless power transmitting device before all power transmission, the information including a coil type of the power receiving unit; and

based on the coil type, determining whether the contactless power transmitting device and the power receiving unit are compatible before power transmission.