Non-contact power supply device and non-contact power transmission device

• US 10,439,424 B2
• Filed: 08/28/2015
• Issued: 10/08/2019
• Est. Priority Date: 08/28/2015
• Status: Active Grant

• Current Assignee: TDK Corporation, Tdk Taiwan Corp. (TDK Corporation)
• Original Assignee: TDK Corporation
• Inventors: Itagaki, Kazuya, Higuma, Shinji, Fukai, Tsutomu
• Primary Examiner(s): Grant, Robert
• Application Number:
  US15/755,613
• Publication Number:
  US 20190081496A1
• Time in Patent Office: 1,502 Days
• Field of Search: 320108
• 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 50/10 using inductive coupling
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction

Abstract

A non-contact power supply device on which a power-feeding object device can easily and appropriately be placed, and a non-contact power transmission device including the power-feeding object device. The non-contact power transmission device includes a non-contact power supply device having a power feeding coil, a housing that houses the power feeding coil, and a bobbin around which the power feeding coil is wound. The housing has a concave part at least partially accommodating a power-feeding object device. The concave part has a curved surface at least in a portion of an inner surface on which the power-feeding object device is placed. The curved inner surface of the concave part prevents the power-feeding object device from standing upright. A portable electronic device serving as the power-feeding object device is at least partially accommodated in the concave part.

Claims

1. A non-contact power supply device comprising:

a power feeding coil;

a housing containing the power feeding coil, wherein

the housing has a concave part capable of at least partially accommodating a power-feeding object device,

the power feeding coil includes helically wound turns wound around the concave part, and

the power feeding coil has an outer circumference and further comprises a first magnetic body covering the outer circumference of the power feeding coil; and

a second magnetic body disposed at a position facing a bottom portion of the concave part of the housing, wherein the second magnetic body has a through-hole in a portion facing a center bottom portion of the concave part.

2. The non-contact power supply device according to claim 1, wherein the concave part has an opening side with an opening, a bottom side with a bottom, and a portion with a width narrowing from the opening side toward the bottom side.

3. The non-contact power supply device according to claim 2, wherein the concave part has an inner surface including a curved surface in at least a portion of the inner surface and on which the power-feeding object device may be placed.

4. The non-contact power supply device according to claim 3, wherein the inner surface of the concave part has a portion in which curvature of the curved surface decreases from the opening side toward the bottom side.

5. The non-contact power supply device according to claim 1, wherein the power feeding coil has an axial direction, the power-feeding object device includes a power receiving coil having an axial direction, and the concave part has an inner surface with a shape for supporting the power-feeding object device in a posture preventing the axial direction of a power receiving coil of the power-feeding object device from orthogonally crossing the axial direction of the power feeding coil when the power-feeding object device is located on the inner surface of the concave part.

6. The non-contact power supply device according claim 1, wherein the power-feeding object device has a body part with a maximum length and the concave part has an opening with a width that is longer than the maximum length of the body part of the power-feeding object device.

7. The non-contact power supply device according to claim 1, wherein the concave part has a bottom portion with a center and a protruding part disposed at the center of the bottom portion.

8. The non-contact power supply device according to 2, wherein the power feeding coil is wound around and spreads outward from the bottom side toward the opening side of the concave part.

9. A non-contact power supply device comprising:

a power feeding coil;

a housing containing the power feeding coil, wherein

the housing has a concave part capable of at least partially accommodating a power-feeding object device, and

the power feeding coil includes helically wound turns wound around the concave part, and

the concave part has a bottom portion;

an auxiliary power feeding coil disposed at a position facing the bottom portion of the concave part of the housing, wherein the auxiliary power feeding coil is planar; and

a magnetic body on a side of the auxiliary power feeding coil opposite the bottom portion of the concave part.

10. The non-contact power supply device according to claim 9, wherein the concave part has an opening side with an opening, a bottom side with a bottom, and a portion with a width narrowing from the opening side toward the bottom side.

11. The non-contact power supply device according to claim 10, wherein the concave part has an inner surface including a curved surface in at least a portion of the inner surface and on which the power-feeding object device may be placed.

12. The non-contact power supply device according to claim 11, wherein the inner surface of the concave part has a portion in which curvature of the curved surface decreases from the opening side toward the bottom side.

13. The non-contact power supply device according to claim 9, wherein the power feeding coil has an axial direction, the power-feeding object device includes a power receiving coil having an axial direction, and the concave part has an inner surface with a shape for supporting the power-feeding object device in a posture preventing the axial direction of a power receiving coil of the power-feeding object device from orthogonally crossing the axial direction of the power feeding coil when the power-feeding object device is located on the inner surface of the concave part.

14. The non-contact power supply device according claim 9, wherein the power-feeding object device has a body part with a maximum length and the concave part has an opening with a width that is longer than the maximum length of the body part of the power-feeding object device.

15. A non-contact power transmission device comprising:

a non-contact power supply device including

a power feeding coil, and

a housing containing the power feeding coil, wherein

the housing has a concave part, and

the power feeding coil includes helically turns wound around the concave part; and

a portable electronic device at least partially accommodated in the concave part of the non-contact power supply device, wherein the portable electronic device includes

a non-contact power receiving component,

a secondary battery,

a power receiving coil helically wound around an outer circumferential surface of the secondary battery, and

a first magnetic body disposed or extended between the power receiving coil and the outer circumferential surface of the secondary battery.

16. The non-contact power transmission device according to claim 15, wherein the first magnetic body has a box shape having an internal space accommodating the secondary battery.

17. The non-contact power transmission device according to claim 16, wherein the first magnetic body has respective flange parts located at axial end portions of the power receiving coil.

18. The non-contact power transmission device according to claim 15, wherein the first magnetic body has a hollow tubular shape with first and second open ends for accommodating the secondary battery.

19. The non-contact power transmission device according to claim 18, comprising a second magnetic body covering the first open end of the first magnetic body.

20. The non-contact power transmission device according to claim 19, comprising a third magnetic body covering the second open end of the first magnetic body.

21. A non-contact power transmission device comprising:

a non-contact power supply device including

a power feeding coil, and

a housing containing the power feeding coil, wherein

the housing has a concave part, and

the power feeding coil includes helically turns wound around the concave part; and

a portable electronic device at least partially accommodated in the concave part of the non-contact power supply device, wherein the portable electronic device includes

a non-contact power receiving component,

a secondary battery,

a power receiving coil helically wound around an outer circumferential surface of the secondary battery, and

a voltage conversion circuit converting an output voltage of the secondary battery and including a voltage conversion coil, wherein

each of the power receiving coil and the voltage conversion coil has respective windings surrounding a respective central axis of the power receiving coil and the voltage conversion coil, and

the center axis of one of the power receiving coil and the voltage conversion coil is inside the windings of the other of the power receiving coil and the voltage conversion coil.

22. The non-contact power transmission device according to claim 21, wherein the voltage conversion coil is helically wound around the outer circumferential surface of the secondary battery.

23. The non-contact power transmission device according to claim 22, including a magnetic body disposed or extended between the voltage conversion coil and the outer circumferential surface of the secondary battery.

24. The non-contact power transmission device according to claim 21, wherein the power receiving coil and the voltage conversion coil are bifilar windings.