Method and system for simultaneously wirelessly charging portable rechargeable devices based on wireless inductive power transfer with seamless free positioning capability

• US 9,893,553 B2
• Filed: 12/25/2014
• Issued: 02/13/2018
• Est. Priority Date: 12/24/2013
• Status: Expired due to Fees

• Current Assignee: Pavan Pudipeddi
• Original Assignee: Pavan Pudipeddi
• Inventors: Pudipeddi, Pavan, Katragadda, Anandaram, Chava, Naveen
• Primary Examiner(s): WILLIAMS, ARUN C
• Application Number:
  US14/583,095
• Publication Number:
  US 20160190851A1
• Time in Patent Office: 1,146 Days
• Field of Search: 320108
• CPC Class Codes: H01F 27/22 Cooling by heat conduction through solid or powdered fillings
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/366 made of 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 50/10 using inductive coupling
• 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 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Embodiments of the present invention specifically relate to a system for seamlessly and simultaneously wirelessly charging portable chargeable devices with free positioning capability and a method therefor. The system comprises a charging subsystem. The charging subsystem comprises an electromagnetic shield for minimization of interference, and a transmitter coil array. The transmitter coil array comprises a first plurality of transmitter coils juxtaposed to each other and coupled to the electromagnetic shield, and a second plurality of transmitter coils, wherein each of the second plurality of transmitter coils is overlappingly coupled to at least a pair of the first plurality of transmitter coils in juxtaposition and positioned thereunder, and at least a controller for scanning the transmitter coils and selectively activating and deactivating the transmitter coils based on the detection of receiver coils positioned at any position relative to the transmitter coils, and a portable chargeable device comprising a receiver coil, wherein the system facilitates minimization of interference between the transmitter coils in juxtaposition.

Claims

1. A system for seamlessly and simultaneously wirelessly charging portable chargeable devices with free positioning capability, the system comprising:

a charging subsystem comprising;

at least a customized heat sink configuration for optimal thermal management, wherein the customized heat sink is designed based on thermal management methodologies comprising use of Phase Change Materials (PCMs),

at least a single-layer customized shield structure for minimization of interference, and

at least a multi-layer customized coil configuration forming a corresponding transmitter coil array, wherein the corresponding transmitter coil array comprises;

a first plurality of transmitter coils juxtaposed to each other and coupled to the customized shield structure such that the first plurality of transmitter coils is confined to a first layer relative to the surface of the single-layer customized shield structure, and

a second plurality of transmitter coils, wherein each of the second plurality of transmitter coils is overlappingly coupled to at least a pair of the first plurality of transmitter coils in juxtaposition and positioned thereunder such that the second plurality of transmitter coils are confined to a second layer relative to the surface of the single-layer customized shield structure;

at least a controller for scanning the transmitter coils and at least one of selectively activating and deactivating the transmitter coils based on the detection of receiver coils positioned at any position relative to the transmitter coils; and

a portable chargeable device comprising a receiver coil, wherein the system facilitates minimization of interference between the transmitter coils in juxtaposition.

2. The system of claim 1, wherein there is no physical demarcation between at least one individual coil at least one of juxtaposed, overlappingly coupled to at least one other individual coil, and combinations thereof, wherein each of such at least one and one other individual coils correspondingly belong to the first and second plurality of transmitter coils of the transmitter coil array, and wherein each of such at least one and one other individual coils is correspondingly confined to the first and second layers, of the multi-layer customized coil configuration, relative to the surface single-layer customized shield structure thereby facilitating streamlined, simultaneous and seamless free positioning of the portable rechargeable devices on the charging subsystem.

3. The system of claim 1, wherein the transmitter coils may be at least one of selectively activated and deactivated using the controller thereby facilitating minimization of interference between the transmitter coils.

4. The system of claim 1, wherein the at least one single-layer customized shield structure possesses at least one of a composite modular and monolithic structure thereby facilitating minimization of Electromagnetic Interference (EMI).

5. The system of claim 4, wherein the at least one single-layer customized shield structure comprises one or more sets of shield blocks comprising one or more shield blocks with heterogeneous specifications such that each individual set of the sets of shield blocks comprises one or more shield blocks with homogeneous specifications.

6. The system of claim 5, wherein each shield block of the sets of shield blocks is juxtaposed in at least one of proximity and vicinity to each other thereby resulting in at least one of presence and absence of a selectively adjustable space therebetween.

7. The system of claim 6, wherein the selectively adjustable space further facilitates at least one of zeroization and minimization of inter-shield block EMI.

8. The system of claim 6, wherein the selectively adjustable space may be at least one of void and filled with a material possessing apt specifications.

9. The system of claim 8, wherein the material may be at least one of thermally conductive, electrically, magnetically insulative and a combination thereof.

10. The system of claim 8, wherein the material may be at least one of solid and perforated and at least one of transparent, translucent and opaque.

11. The system of claim 1, wherein the multi-layer customized coil configuration may comprise one or more transmitter coils arranged in the form a multi-layer structure, wherein each layer may comprise at least one transmitter coil array.

12. The system of claim 11, wherein the multi-layer structure may comprise at least two layers.

13. The system of claim 1, wherein the thermal management methodologies comprise use of at least one of Phase Change Materials (PCMs) and synthetic diamond.

14. The system of claim 13, wherein the PCMs may be classified into organic PCMs, inorganic, eutectic and hygroscopic materials.

15. A method for design and implementation of a system facilitating seamless and simultaneous wireless charging of portable rechargeable devices with free positioning capability, the method comprising:

forming a plurality of single-layer customized shield structures for selective adoption and deployment of at least one the single-layer plurality of customized shield structures formed, wherein at least one of the single-layer customized shield structures comprises;

one or more shield blocks, and

at least one of interposed and sandwiched exploitable regions or spaces therebetween, thereby facilitating minimization of inter-shield block Electromagnetic Interference (EMI);

organizing one or more transmitter coils in at least one of a plurality of multi-layer customized coil configurations to form at least one transmitter coil array mounted on at least one of the selectively adopted and deployed customized shield structures such that the customized coil configuration facilitates further minimization of inter-coil Electromagnetic Interference (EMI), wherein the combination of at least one of the selectively adopted and deployed single-layer customized shield structure and corresponding multi-layer customized coil configuration facilitates consolidated minimization of EMI; and

deploying at least one processor for implementation of an operational control logic for management of interoperability amid the transmitter coils via at least one of selective activation, deactivation and a combination thereof of the transmitter coils upon detection of one or more receiver coils coupled to the portable rechargeable devices, wherein the portable rechargeable devices are at any position relative to the transmitter coils for purposes of charging; and

forming one or more customized heat sink configurations for optimal thermal management of the system via deployment of one or more thermal management methodologies.

16. The method of claim 15, wherein the system facilitates seamless and simultaneous wireless charging of at least two portable rechargeable devices with free positioning capability.

17. The method of claim 15, wherein the plurality of customized shield structures is formed using at least one of composite modular and monolithic electromagnetic shield.

18. The method of claim 17, wherein the at least one of composite modular and monolithic electromagnetic shield may possesses at least one of varying material, constructional, geometrical, dimensional, spatial positional, spatial, orientational and a combination thereof.

19. The method of claim 15, wherein the one or more transmitter coils are at least one of virtually and logically partitioned into one or more one or more homogeneously populated sets of transmitter coils thereby facilitating concurrent scanning of each of the homogeneously populated sets of transmitter coils using at least one processor.

20. The method of claim 15, further comprising implementing an optimal interoperability plan for the one or more transmitter coils based on at least one of selective activation and deactivation of the one or more transmitter coils.

21. The method of claim 15, further comprising optimally scanning via pinging each of the one or more transmitter coils based on logical partitioning of the transmitter coil array into at least a pair of sets of transmitter coils managed using at least one processor.

22. The method of claim 21, wherein the ping signal comprises at least one of an analog ping signal and a digital ping signal.