CHARGING SYSTEM AND ELECTRONIC DEVICE

• US 20100237827A1
• Filed: 05/05/2009
• Published: 09/23/2010
• Est. Priority Date: 03/19/2009
• Status: Active Grant

• Current Assignee: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. (Hon Hai Precision Industry Co., Ltd.), Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. (Hon Hai Precision Industry Co., Ltd.), Hon Hai Precision Industry Co., Ltd.
• Inventors: Sip, Kim-Yeung
• Granted Patent: US 8,248,025 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A charging system for charging a rechargeable battery in an electronic device includes a charging generator, a receiver and at least one magnetic core. The charging generator includes a first coil. The receiver includes a second coil magnetically coupled to the first coil, and a charging module electrically connecting the second coil to the rechargeable battery. The charging module is configured for charging the rechargeable battery using current induced in the second coil. The at least one magnetic core is sleeved by the first coil or by the second coil.

Claims

1. A charging system for charging a rechargeable battery in an electronic device, the charging system comprising:

a charging generator comprising a first coil, the first coil being a planar spiral coil;

a receiver comprising a second coil magnetically coupled to the first coil, and a charging module electrically connecting the second coil to the rechargeable battery, the charging module configured for charging the rechargeable battery using current induced in the second coil, the second coil being a planar spiral coil; and

at least one magnetic core sleeved by the first coil or by the second coil.

2. The charging system as claimed in claim 1, wherein the at least one magnetic core is two, one magnetic core being a first magnetic core sleeved by the first coil, the other magnetic core being a second magnetic core sleeved by the second coil, the first magnetic core aligned with the second magnetic core.

3. The charging system as claimed in claim 2, wherein the charging generator further comprises a housing, the first magnetic core extending through the housing, the first coil received in the housing.

4. The charging system as claimed in claim 1, wherein the charging generator further comprises at least two first positioning portions, each being radially away from the first coil and each adjacent first positioning portions being the same distance from each other, and the receiver further comprises at least two second positioning portions, each being radially away from the second coil and each adjacent second positioning portions being the same distance from each other, each first positioning portion being capable of attracting a corresponding second positioning portion for aligning the receiver with the charging generator.

5. The charging system as claimed in claim 3, wherein the first magnetic core comprises a disc-shaped body and a pole extending perpendicularly from the disc-shaped body.

6. The charging system as claimed in claim 5, wherein the receiver is attached to an inner surface of a cover of the electronic device.

7. The charging system as claimed in claim 6, wherein a first through hole is defined in the cover, the second magnetic core fixedly received in the first through hole and an end surface of the second magnetic core coplanar with an outer surface of the cover and exposed from the cover;

and wherein the housing includes a central concave portion at a top surface thereof, a second through hole defined in the central concave portion, the pole extending from the second through hole and protruding from the central concave portion so that the first magnetic core is capable of contacting the second magnetic core.

8. An electronic device, comprising:

a rechargeable battery; and

a receiver comprising a coil, and a charging module electrically connecting the coil to the rechargeable battery, the coil being a planar spiral coil and configured for inductively coupling to a magnetic field produced by a charging generator, the charging module configured for charging the rechargeable battery using current induced in the coil.

9. The electronic device as claimed in claim 8, wherein the receiver further comprises a magnetic core sleeved by the coil.

10. The electronic device as claimed in claim 8, wherein the receiver further comprises at least two positioning portions, each being radially away from the coil and each adjacent positioning portions being the same distance from each other.

11. The electronic device as claimed in claim 9, further comprising a cover, a through hole defined in the cover, the magnetic core fixedly received in the through hole.

12. The electronic device as claimed in claim 11, wherein the receiver is attached to an inner surface of the cover.

13. A charging system, comprising:

a charging generator comprising a first coil, the first coil being a planar spiral coil;

an electronic device, comprising;

a rechargeable battery; and

a receiver comprising a second coil magnetically coupled to the first coil, and a charging module electrically connecting the second coil to the rechargeable battery, the charging module configured for charging the rechargeable battery using current induced in the second coil, the second coil being a planar spiral coil; and

at least one magnetic core sleeved by the first coil or by the second coil.

14. The charging system as claimed in claim 13, wherein the at least one magnetic core is two, one magnetic core being a first magnetic core sleeved by the first coil, the other magnetic core being a second magnetic core sleeved by the second coil, the first magnetic core aligned with the second magnetic core.

15. The charging system as claimed in claim 14, wherein the charging generator further comprises a housing, the first magnetic core extending through the housing, and the first coil is received in the housing.

16. The charging system as claimed in claim 13, wherein the charging generator further comprises at least two first positioning portions, each being radially away from the first coil and each adjacent first positioning portions being the same distance from each other, and the receiver further comprises at least two second positioning portions, each being radially away from the second coil and each adjacent second positioning portions being the same distance from each other, each first positioning portion be capable of attracting a corresponding second positioning portion for aligning the receiver with the charging generator.

17. The charging system as claimed in claim 15, wherein the first magnetic core comprises a disc-shaped body and a pole extending perpendicularly from the disc-shaped body.

18. The charging system as claimed in claim 17, wherein the electronic device further comprises a cover, the receiver attached to an inner surface of the cover.

19. The charging system as claimed in claim 18, wherein a first through hole is defined in the cover, the second magnetic core fixedly received in the first through hole and an end surface of the second magnetic core coplanar with an outer surface of the cover and exposed from the cover;

and wherein the housing includes a central concave portion at a top surface thereof, a second through hole defined in the central concave portion, the pole extending from the second through hole and protruding from the central concave portion so that the first magnetic core is capable of contacting the second magnetic core.