POWER FEEDING COIL UNIT, WIRELESS POWER FEEDING DEVICE AND WIRELESS POWER TRANSMISSION DEVICE

• US 20170288465A1
• Filed: 03/29/2017
• Published: 10/05/2017
• Est. Priority Date: 03/30/2016
• Status: Active Grant

• Current Assignee: TDK Corporation
• Original Assignee: TDK Corporation
• Inventors: SUGASAWA, Masayuki, KOBAYASHI, Masayuki, FUKUSHIMA, Noriyuki
• Granted Patent: US 10,404,102 B2
• Time in Patent Office: Days
• 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: H01F 27/02 Casings
• CPC Class Codes: H01F 27/2823 Wires H01F27/2866 takes precedence
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/363 made of electrically conductive 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 7/0042 characterised by the mechanical construction
• 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

A power feeding coil unit for wireless power transmission including a base portion with bottom having an opening on an upper end, a magnetic body having a plurality of magnetic plates disposed on a bottom surface of the base portion, a power feeding coil formed by winding a conductive wire on the magnetic body, a cover portion covering the opening of the base portion, and a rib extending from the base portion toward the cover portion between the plurality of magnetic plates and between the wires of the conductive wires, wherein, a distance between the rib and the cover portion is smaller than a distance between the power feeding coil and the cover portion.

Claims

1. A power feeding coil unit for wireless power transmission, comprising:

a base portion with bottom having an opening on an upper end,

a magnetic body having a plurality of magnetic plates disposed on a bottom surface of the base portion,

a power feeding coil formed by winding a conductive wire on the magnetic body,

a cover portion covering the opening of the base portion, and

a rib extending from the base portion toward the cover portion between the plurality of magnetic plates and between the wires of the conductive wires,

wherein, a distance between the rib and the cover portion is smaller than a distance between the power feeding coil and the cover portion.

2. The power feeding coil unit according to claim 1, wherein,

the power feeding coil has an opening portion in the center portion with a conductive wire wound to surround the opening portion,

and the cover portion comprises a protruding portion protruding toward the opening portion.

3. The power feeding coil unit according to claim 1, wherein,

one end of the rib is in contact with the cover portion.

4. The power feeding coil unit according to claim 2, wherein,

one end of the rib is in contact with the cover portion.

5. A wireless power feeding device comprising the power feeding coil unit according to claim 1.

6. A wireless power feeding device comprising the power feeding coil unit according to claim 2.

7. A wireless power feeding device comprising the power feeding coil unit according to claim 3.

8. A wireless power feeding device comprising the power feeding coil unit according to claim 4.

9. A wireless power transmission device comprising a wireless power feeding device and a wireless power receiving device, wherein,

the wireless power feeding device is the wireless power feeding device according to claim 5.

10. A wireless power transmission device comprising a wireless power feeding device and a wireless power receiving device, wherein,

the wireless power feeding device is the wireless power feeding device according to claim 6.

11. A wireless power transmission device comprising a wireless power feeding device and a wireless power receiving device, wherein,

the wireless power feeding device is the wireless power feeding device according to claim 7.

12. A wireless power transmission device comprising a wireless power feeding device and a wireless power receiving device, wherein,

the wireless power feeding device is the wireless power feeding device according to claim 8.