Power supply unit, power receiving unit, and power supply system

• US 9,859,718 B2
• Filed: 04/28/2015
• Issued: 01/02/2018
• Est. Priority Date: 11/01/2012
• Status: Active Grant

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Kagami, Kazuyoshi, Yanagida, You, Tanaka, Shingo, Terayama, Hajime
• Primary Examiner(s): Donovan, Lincoln
• Assistant Examiner(s): Almo, Khareem E
• Application Number:
  US14/697,960
• Publication Number:
  US 20150244181A1
• Time in Patent Office: 980 Days
• Field of Search: None
• CPC Class Codes: H01F 27/361 made of combinations of electrically conductive material and ferromagnetic material
• 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 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

Provided is a power supply system in which an electromagnetic leakage is prevented. A power supply side resonance coil provided to a power supply unit and a power receiving side resonance coil provided to a power receiving unit are housed respectively in a conductive power supply side shield case and power receiving side shield case. The power supply side shield case is formed of a bottom wall covering a side of the power supply side resonance coil spaced apart from the power receiving side resonance coil and a vertical wall erecting from a periphery of the bottom wall, and a ferrite is provided onto surfaces of the bottom wall and the vertical wall.

Claims

1. A power supply unit comprising:

a power source;

a power supply side resonance coil configured to resonance with a power receiving side resonance coil mounted to a vehicle to supply power supplied from the power source to the power receiving side resonance coil in a non-contact manner; and

a conductive shield case formed of;

a bottom wall covering a side of the power supply side resonance coil spaced apart from the power receiving side resonance coil; and

a vertical wall erecting from a periphery of the bottom wall,

wherein the power supply side resonance coil is disposed in the conductive shield case, and

wherein a magnetic body is provided onto a surface of the vertical wall of the shield case, and the magnetic body is provided onto an outer surface of the shield case.

3. A power supply system comprising:

the power supply unit according to claim 1; and

a power receiving unit comprising;

a power receiving side resonance coil mounted to a vehicle and configured to electromagnetically resonate with a power supply side resonance coil to receive power from the power supply side resonance coil in a non-contact manner; and

a conductive shield case formed of;

a bottom wall covering a side of the power receiving side resonance coil spaced apart from the power supply side resonance coil; and

a vertical wall erecting from a periphery of the bottom wall,

wherein the power receiving side resonance coil is disposed in the conductive shield case, and

wherein a magnetic body is provided onto a surface of the vertical wall of the shield case, and the magnetic body is provided onto an outer surface of the shield case.

4. The power supply system according to claim 3, wherein the magnetic body is further provided to the bottom wall of the shield case.

5. The power supply system according to claim 3, wherein the magnetic body is provided with a slit.

6. The power supply system according to claim 4, wherein the magnetic body is provided with a slit.

7. The power supply system according to claim 4,

wherein the magnetic body is provided with a slit,

central axes of the power supply side resonance coil and the power receiving side resonance coil are disposed to be perpendicular to a separation direction of the power supply side resonance coil and the power receiving side resonance coil while power is being supplied, and

the slit is provided along the central axis.

2. A power receiving unit comprising:

a power receiving side resonance coil mounted to a vehicle and configured to electromagnetically resonate with a power supply side resonance coil to receive power from the power supply side resonance coil in a non-contact manner; and

a conductive shield case formed of;

a bottom wall covering a side of the power receiving side resonance coil spaced apart from the power supply side resonance coil; and

a vertical wall erecting from a periphery of the bottom wall,

wherein the power receiving side resonance coil is disposed in the conductive shield case, and

wherein a magnetic body is provided onto a surface of the vertical wall of the shield case, and the magnetic body is provided onto an outer surface of the shield case.