Conductor arrangement structure for wireless power supply system

• US 10,315,523 B2
• Filed: 09/27/2013
• Issued: 06/11/2019
• Est. Priority Date: 09/27/2013
• Status: Active Grant

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Kinoshita, Takuya, Tsukamoto, Yukinori
• Primary Examiner(s): Barnie, Rexford N
• Assistant Examiner(s): Inge, Joseph
• Application Number:
  US15/024,880
• Publication Number:
  US 20160236575A1
• Time in Patent Office: 2,083 Days
• Field of Search: 307104
• 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 53/124 Detection or removal of foreign bodies
• CPC Class Codes: B60L 53/36 by positioning the vehicle
• CPC Class Codes: H01F 2027/348 Preventing eddy currents
• CPC Class Codes: H01F 27/2823 Wires H01F27/2866 takes precedence
• CPC Class Codes: H01F 27/34 Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
• 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 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• 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 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A conductor arrangement structure for a wireless power supply system which is equipped with a ground-side device (3) that is installed on a ground side and has a power-feeding coil (L1) and a vehicle-side device (2) that is installed on a vehicle (1) and has a power-receiving coil (L2) and in which electric power is supplied from the ground-side device (3) to the vehicle-side device (2) without contact, wherein grounding wires (23) are arranged between the power-feeding coil (L1) and the power-receiving coil (L2) so as to extend over a high-potential portion and a low-potential portion of an electric field that is generated when the power-feeding coil (L1) is excited.

Claims

1. A wireless power supply system which is equipped with a power-feeding device that is installed on a ground side and has a power-feeding coil and a power-receiving device that is installed on a vehicle and has a power-receiving coil and in which electric power is supplied from the power-feeding device to the power-receiving device without contact, comprising

a conductor arrangement structure wherein a conductor having a linear shape is arranged between the power-feeding coil and the power-receiving coil so as to extend linearly over a high-potential portion and a low-potential portion of an electric field that is generated when the power-feeding coil is excited, wherein

one end portion of the conductor is open-circuited, and an other end portion of the conductor is connected to ground,

wherein the power-feeding device includes a housing frame in which the power-feeding coil is placed, the conductor is arranged inside a lid member made of resin provided so as to cover the housing frame, and is arranged above the power-feeding coil,

wherein the conductor is arranged parallel to lines of electric force generated in the electric field and extends over the high-potential portion and the low-potential portion of the electric field so as to dump the voltage generated by the parasitic capacitance between the power-feeding coil and the power-receiving coil to the ground.

2. The wireless power supply system according to claim 1, wherein a plurality of the conductors are arranged parallel to lines of electric force generated in the electric field.

3. The wireless power supply system according to claim 1, wherein a plurality of the conductors are arranged parallel to each other, all of one end portions of the conductors are open-circuited, all of other end portions of the conductors are short-circuited, and short-circuited points of the other end portions are connected to ground.

4. The wireless power supply system according to claim 1, including a search coil substrate to detect presence of a foreign substance near the power-feeding coil, and the conductor is arranged in the search coil substrate.

5. The wireless power supply system according to claim 1, wherein a plurality of the conductors are arranged parallel to lines of electric force generated in the electric field and extend over the high-potential portion and the low-potential portion of the electric field so as to dump the voltage generated by the parasitic capacitance between the power-feeding coil and the power-receiving coil to the ground.