Power feeding device and non-contact power transmission device

• US 10,218,186 B2
• Filed: 12/21/2015
• Issued: 02/26/2019
• Est. Priority Date: 01/08/2015
• Status: Active Grant

• Current Assignee: TDK Corporation
• Original Assignee: TDK Corporation
• Inventors: Urano, Takashi
• Primary Examiner(s): Kaplan, Hal
• Assistant Examiner(s): Vu, Toan
• Application Number:
  US14/976,885
• Publication Number:
  US 20160204621A1
• Time in Patent Office: 1,163 Days
• Field of Search: 307104
• 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 53/32 by charging in short intervals along the itinerary, e.g. during short stops
• CPC Class Codes: B60L 53/39 with position-responsive activation of primary coils
• 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 2310/40 The network being an on-board power network, i.e. within a vehicle
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• 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

Power feeding device and non-contact power transmission device which are capable of maintaining high power transmission efficiency even if any displacement occurs in relative positions of each power feeding coil among plurality of power feeding coils and power receiving coil are provided. Power feeding device includes power feeding coil unit which includes magnetic body unit in which at least three magnetic bodies are arranged to be spaced apart in first direction, and plurality of power feeding coils each formed of wire wound around at least two magnetic bodies in magnetic body unit, and plurality of power feeding coils, which are located adjacently in the first direction, are configured such that wires of the plurality of power feeding coils are wound in common around one or more magnetic bodies, number of which is less than number of magnetic bodies around which wires of the respective power feeding coils and are wound.

Claims

1. A power feeding device for transmitting power to a power receiving device in a non-contact manner, the power feeding device comprising:

a power feeding coil unit including a magnetic body unit in which at least three magnetic bodies are spaced apart in a first direction, and a plurality of power feeding coils each formed of a wire wound around at least two magnetic bodies of the at least three magnetic bodies in the magnetic body unit;

a selection unit that selects a coil to which power is supplied from among the plurality of power feeding coils; and

a drive unit that supplies power to the coil selected by the selection unit,

wherein

the plurality of power feeding coils, which are located adjacently in the first direction, are configured such that the wires of the plurality of power feeding coils are wound in common around one or more magnetic bodies of the at least three magnetic bodies, the number of the one or more magnetic bodies being less than the number of the at least two magnetic bodies,

each of the at least three magnetic bodies has a longitudinal axis, and

the longitudinal axes of the at least three magnetic bodies are spaced perpendicular to the longitudinal axes and are parallel.

2. The power feeding device according to claim 1, wherein the wires of the plurality of power feeding coils are arranged alternately in a second direction perpendicular to the first direction around the one or more magnetic bodies around which the wires are wound in common.

3. The power feeding device according to claim 1, wherein the plurality of power feeding coils are configured such that the number of the at least three magnetic bodies around which only one wire of the plurality of power feeding coils is wound is larger than the number of the at least three magnetic bodies around which two wires of the plurality of power feeding coils are wound.

4. A non-contact power transmission device for transmitting power from a power feeding device to a power receiving device in a non-contact manner, wherein

the power feeding device is constituted by the power feeding device according to claim 1, and

the power receiving device includes a power receiving coil, and a rectifier unit that rectifies power received by the power receiving coil and outputs the rectified power to a load.

5. The power feeding device according to claim 1, wherein the longitudinal axes of the at least three magnetic bodies are perpendicular to the first direction.

6. The power feeding device according to claim 1, wherein ends of the at least three magnetic bodies are aligned in the first direction.

7. The power feeding device according to claim 1, wherein the at least three magnetic bodies have the same length.

8. A power feeding device for transmitting power to a power receiving device in a non-contact manner, the power feeding device comprising:

a power feeding coil unit including a magnetic body unit in which at least three magnetic bodies are spaced apart in a first direction, and a plurality of power feeding coils each formed of a wire wound around at least two magnetic bodies of the at least three magnetic bodies in the magnetic body unit;

a selection unit that selects a coil to which power is supplied from the plurality of power feeding coils; and

a drive unit that supplies power to the coil selected by the selection unit, wherein

the plurality of power feeding coils, which are located adjacently in the first direction, are configured such that the wires of the plurality of power feeding coils are wound in common around one or more magnetic bodies of the at least three magnetic bodies, the number of the one or more magnetic bodies being less than the number of the at least two magnetic bodies,

each of the plurality of power feeding coils has a longitudinal axis, and

the longitudinal axes of the plurality of power feeding coils are spaced perpendicular to the longitudinal axes and are parallel.