# US 10,320,222 B2 · System and method for a multi-coil wireless power transfer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,320,222 B2 - Document ID: US10320222B2 - Status: Granted - Kind: B2 - Application number: 15/414,018 - Filed: 2017-01-24 - Published: 2017-05-11 - Granted: 2019-06-11 - Earliest claimed: 2014-11-20 - Assignees: Dell Products L.P. - Applicants: Dell Products L.P. - Inventors: Lawrence E. Knepper - Web page: https://patentgrep.com/patent/US10320222B2 ## CPC - H02J 7/42: with electronic devices having internal batteries, e.g. mobile phones - H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries - H02J 50/10: using inductive coupling - H02J 50/80: involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices - H02J 50/90: involving detection or optimisation of position, e.g. alignment - H04B 5/26: using coils - H04B 5/79: for data transfer in combination with power transfer - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H04B: TRANSMISSION ## Abstract Systems and methods are disclosed for multi-coil wireless power transfer. The system includes a first transmitting coil disposed within a lower portion of a wireless charger, and a second transmitting coil disposed within a side portion of the wireless charger. The system further includes a communications module configured to receive a signal from an information handling system. The information handling system includes a receiving coil. The system additionally includes a transmit module configured to determine an orientation of the receiving coil, and provide a first current to the first transmitting coil and a second current to the second transmitting coil based on the orientation of the receiving coil. ## Claims ### Claim 1 A wireless charging system comprising: a first transmitting coil disposed within a lower portion of a wireless charger; a second transmitting coil disposed within a side portion of the wireless charger; a communications module configured to receive a signal from an information handling system, the information handling system including a receiving coil; and a processor configured to: determine an orientation of the receiving coil, wherein the receiving coil is not oriented coaxially with the first transmitting coil or the second transmitting coil; determine a target flux vector based on the orientation of the receiving coil; and determine a first current to provide to the first transmitting coil and a second current to provide to the second transmitting coil based on the target flux vector. ### Claim 2 (depends on 1) The system of claim 1, wherein the processor is further configured to provide the first current to the first transmitting coil and the second current to the second transmitting coil. ### Claim 3 (depends on 2) The system of claim 2, wherein the processor is further configured to provide the first current and the second current based on a direction of a resultant flux vector approximating the direction of the target flux vector. ### Claim 4 (depends on 3) The system of claim 3, wherein the wireless charger is configured to transfer power to the information handling system. ### Claim 5 (depends on 4) The system of claim 4, wherein the processor is further configured to determine if the power transfer is occurring at an optimum charging rate. ### Claim 6 (depends on 5) The system of claim 5, wherein the processor is further configured to adjust the first current based on a changed direction of the target flux vector. ### Claim 7 (depends on 1) The system of claim 1, wherein the side portion is configured such that the second transmitting coil is oriented substantially perpendicular to the first transmitting coil. ### Claim 8 (depends on 1) The system of claim 1, wherein the signal includes identification information of the information handling system. ### Claim 9 A method for wireless charging comprising: receiving a signal from an information handling system, the information handling system including a receiving coil; determining an orientation of the receiving coil, wherein the receiving coil is not oriented coaxially with a first transmitting coil disposed within a lower portion of a wireless charger or a second transmitting coil disposed within a side portion of the wireless charger; determining a target flux vector based on the orientation of the receiving coil; and determining a first current to provide to the first transmitting coil and a second current to provide to the second transmitting coil based on the target flux vector. ### Claim 10 (depends on 9) The method of claim 9, further comprising wherein providing the first current to the first transmitting coil and the second current to the second transmitting coil. ### Claim 11 (depends on 10) The method of claim 10, wherein providing the first current and the second current is further based on a direction of a resultant flux vector approximating the direction of the target flux vector. ### Claim 12 (depends on 11) The method of claim 11, further comprising transferring power to the information handling system. ### Claim 13 (depends on 12) The method of claim 12, further comprising determining if the power transfer is occurring at an optimum charging rate. ### Claim 14 (depends on 13) The method of claim 13, further comprising adjusting the first current based on a changed direction of the target flux vector. ### Claim 15 (depends on 9) The method of claim 9, wherein the side portion is configured such the second transmitting coil is oriented substantially perpendicular to the first transmitting coil. ### Claim 16 (depends on 9) The method of claim 9, wherein the signal includes identification information of the information handling system. ### Claim 17 A non-transitory machine-readable storage medium encoded with instructions executable by one or more processors to perform one or more operations, the one or more operations comprising: receiving a signal from an information handling system, the information handling system including a receiving coil; determining an orientation of the receiving coil, wherein the receiving coil is not oriented coaxially with a first transmitting coil disposed within a lower portion of a wireless charger or a second transmitting coil disposed within a side portion of the wireless charger; determining a target flux vector based on the orientation of the receiving coil; and determining a first current to provide to the first transmitting coil and a second current to provide to the second transmitting coil based on the target flux vector. ### Claim 18 (depends on 17) The non-transitory machine-readable storage medium of claim 17, further comprising providing the first current to a first transmitting coil and the second current to a second transmitting coil. ### Claim 19 (depends on 18) The non-transitory machine-readable storage medium of claim 18, wherein providing the first current and the second current is further based on a direction of a resultant flux vector approximating the direction of the target flux vector. ### Claim 20 (depends on 19) The non-transitory machine-readable storage medium of claim 19, further comprising transferring power to the information handling system.