Magnetic induction charging device

• US 10,700,543 B2
• Filed: 01/29/2016
• Issued: 06/30/2020
• Est. Priority Date: 01/30/2015
• Status: Active Grant

• Current Assignee: Continental Automotive France (Continental AG), Continental Automotive GmbH (Continental AG)
• Original Assignee: Continental Automotive France (Continental AG)
• Inventors: Vassilieff, Youri, Cheikh, Mohamed
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): Omar, Ahmed H
• Application Number:
  US15/010,566
• Publication Number:
  US 20160226295A1
• Time in Patent Office: 1,614 Days
• Field of Search: 320108
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence

Abstract

A magnetic induction charging device (50) includes an electrical power supply source (60) connected to a main coil (61). The device (50) includes passive resonant circuits (70, 80, 90, 100) of different respective resonant frequencies in a range of predetermined main frequency values. Each passive resonant circuit (70, 80, 90, 100) includes a secondary coil (71, 81, 91, 101). The secondary coils (71, 81, 91, 101) are arranged in respective different zones of the main coil (61). The electrical power supply source (60) is adapted to generate different charging signals of main frequencies in the range of predetermined main frequency values.

Claims

1. A magnetic induction charging device comprising:

an electrical power supply source connected to a single main coil; and

a plurality of passive resonant circuits of different respective resonant frequencies in a range of predetermined main frequency values, each passive resonant circuit being coupled to the single main coil, each passive resonant circuit comprising a secondary coil, said secondary coils being disposed at least partially facing the single main coil in respective different zones of the single main coil within an outer boundary of the single main coil,

the secondary coils are disposed at least partially facing the single main coil such that the secondary coils are disposed at least partially inside

wherein said electrical power supply source is configured to generate different charging signals of main frequencies in said range of predetermined main frequency values, and

wherein the secondary coils are selectively charged by modifying the charging signals, without using a switch.

2. The charging device as claimed in claim 1, wherein at least two of the secondary coils disposed in respective zones of said single main coil do not have any overlap with each other.

3. The charging device as claimed in claim 1, wherein at least two of the secondary coils disposed in respective zones of said main coil have a partial overlap.

4. The charging device as claimed in claim 1, wherein at least two of the secondary coils are disposed in one and the same plane.

5. The charging device as claimed in claim 1, wherein at least two of the secondary coils are disposed in different planes.

6. A method for charging a receiver via magnetic induction implementing said charging device as claimed in claim 1, said method comprising:

successively generating charging signals of different main frequencies in said range of predetermined main frequency values;

estimating, for each charging signal, a magnitude representative of a charging efficiency of said receiver;

selecting said charging signal to be generated for the charging of said receiver as being the charging signal making it possible to maximize the charging efficiency of said receiver; and

charging said receiver by generating the selected charging signal.

7. A magnetic induction charging device comprising:

an electrical power supply source connected to a single main coil; and

a plurality of passive resonant circuits of different respective resonant frequencies in a range of predetermined main frequency values, each passive resonant circuit being coupled to the single main coil, each passive resonant circuit comprising a secondary coil, said secondary coils being disposed in respective different zones of the single main coil,

wherein said electrical power supply source is configured to generate different charging signals of main frequencies in said range of predetermined main frequency values, and

wherein the secondary coils are disposed at least partially facing the single main coil such that the secondary coils are disposed at least partially inside the single main coil along a longitudinal axis of the main coil.

8. A magnetic induction charging device comprising:

an electrical power supply source connected to a single main coil; and

a plurality of passive resonant circuits of different respective resonant frequencies in a range of predetermined main frequency values, each passive resonant circuit being coupled to the single main coil, each passive resonant circuit comprising a secondary coil, said secondary coils being disposed in respective different zones of the single main coil,

wherein said electrical power supply source is configured to generate different charging signals of main frequencies in said range of predetermined main frequency values, and

wherein the secondary coils are disposed at least partially facing the single main coil such that the secondary coils are disposed at least partially inside an extension of the single main coil along a longitudinal axis of the main coil.