Coil unit and contactless power supplying apparatus

• US 9,620,279 B2
• Filed: 09/14/2015
• Issued: 04/11/2017
• Est. Priority Date: 03/14/2013
• Status: Active Grant

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Terayama, Hajime, Kagami, Kazuyoshi, Tanaka, Shingo
• Primary Examiner(s): NGUYEN, TUYEN T
• Application Number:
  US14/852,733
• Publication Number:
  US 20160005532A1
• Time in Patent Office: 575 Days
• Field of Search: 336 65, 336200, 336232
• CPC Class Codes: H01F 27/00 Details of transformers or inductances, in general
• CPC Class Codes: H01F 27/02 Casings
• CPC Class Codes: H01F 27/06 Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
• CPC Class Codes: H01F 27/08 Cooling heat-transfer elements F28F; Ventilating structural details of casings H01F27/02
• CPC Class Codes: H01F 27/24 Magnetic cores
• CPC Class Codes: H01F 27/346 Preventing or reducing leakage fields using magnetic shields H01F27/36; using auxiliary windings H01F27/38
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01F 5/00 Coils superconducting coils H01F6/06; fixed inductances of the signal type H01F17/00
• 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 90/14 Plug-in electric vehicles

Abstract

In a power supplying side core around which a power supplying side resonant coil is wound that contactlessly supplies power to a power receiving side resonant coil, a pair of protrusion portions is provided that protrudes from central axis direction both sides of the power supplying side resonant coil toward the power receiving side resonant coil. Further, in a power receiving side core around which the power receiving side resonant coil is wound that contactlessly receives power from the power supplying side resonant coil, a pair of protrusion portions is provided that protrudes from central axis direction both sides of the power receiving side resonant coil toward the power supplying side resonant coil.

Claims

1. A coil unit comprising a coil that performs contactless power supplying with another coil, and a core around which the coil is wound, a central axis of the coil being disposed to be vertical to a separation direction of the other coil and the coil at a time of the power supplying,

wherein the core is divided into a center portion around which the coil is wound and opposed end portions, the opposed end portions of the core being respectively provided with a pair of protrusion portions that protrude toward the another coil,

wherein the center portion and the opposed end portions are arranged side by side along the central axis of the coil, and

wherein a protrusion amount of one of the pair of protrusion portions is adjustable to be larger than a protrusion amount of the other of the pair of protrusion portions by moving the opposed end portions relative to the center portion.

2. A contactless power supplying apparatus comprising a pair of coil units that performs contactless power supplying, wherein at least one of the pair of coil units includes the coil unit described in claim 1.