# US 2019/0356152 A1 · Inductively coupled wireless charger > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0356152 A1 - Document ID: US20190356152A1 - Status: Published application - Kind: A1 - Application number: 16/418,600 - Filed: 2019-05-21 - Published: 2019-11-21 - Earliest claimed: 2018-05-21 - Assignees: Flex Ltd. - Applicants: Flex Ltd. - Inventors: Manolo Mariano M. Melgarejo; Zheng-an Lin; Sunny Sun - Web page: https://patentgrep.com/patent/US20190356152A1 ## CPC - H01F 38/14: Inductive couplings - H02J 50/12: of the resonant type - H02J 50/40: using two or more transmitting or receiving devices (H02J50/50 takes precedence) - H02J 50/80: involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices - H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries - H02J 7/42: with electronic devices having internal batteries, e.g. mobile phones - H02J 50/70: involving the reduction of electric, magnetic or electromagnetic leakage fields - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY ## Abstract An inductively coupled wireless charging system produces a high magnetic flux density to induce voltages in one or more coils of an electronic device via magnetic induction. These induced voltages are used to operate or charge batteries in the one or more electronic devices. The high magnetic flux density may cause electromagnetic interference to other adjacent devices, including other adjacent wireless charging systems. Methods, systems, and devices of the present disclosure are directed to reducing interference among adjacent wireless charging systems during concurrent operation of the adjacent wireless charging systems. ## Claims ### Claim 1 A wireless charging system for reducing interference in adjacent active wireless charging components comprising: a first wireless charging component comprising a first resonant circuit, the first charging component operatively coupled to a first electronic device; and a second wireless charging component comprising a second resonant circuit, the second charging component being located adjacent to the first charging component and operatively coupled to a second electronic device, wherein a first resonant frequency of the first resonant circuit is different than a second resonant frequency of the second resonant circuit. ### Claim 2 (depends on 1) The system according to claim 1, wherein the first resonant circuit further comprises a first resonant capacitance and a first resonant inductance, wherein the second resonant circuit further comprises a second resonant capacitance and a second resonant inductance, wherein the first resonant capacitance is different than the second resonant capacitance, wherein the first resonant inductance is different than the second resonant inductance, and wherein a product of the first resonant capacitance and the first resonant inductance is different than a product of the second resonant capacitance and the second resonant inductance. ### Claim 3 (depends on 2) The system according to claim 2, wherein the first resonant capacitance is substantially equal to the second resonant capacitance, and wherein the first resonant inductance is different than the second resonant inductance. ### Claim 4 (depends on 2) The system according to claim 2, wherein the first resonant capacitance is different than the second resonant capacitance, and wherein the first resonant inductance is substantially equal to the second resonant inductance. ### Claim 5 A wireless charging system for avoiding shutdown in adjacent active wireless charging components comprising: a first wireless charging component, the first wireless charging component electromagnetically coupled to a first electronic device; a second wireless charging component, the second wireless charging component being positioned adjacent to the first wireless charging component and electromagnetically coupled to a second electronic device; and a processor that detects an increase in a first voltage of the first wireless charging component above a predetermined voltage threshold; wherein, in response to detecting the increase in the first voltage, the processor adjusts a first communication link timeout of the first charging component. ### Claim 6 (depends on 5) The system according to claim 5, wherein the increase in the first voltage of the first wireless charging component occurs when the first electronic device is decoupled from the first wireless charging component. ### Claim 7 (depends on 5) The system according to claim 5, wherein the first communication link timeout of the first wireless charging component is reduced below a default communication link timeout. ### Claim 8 (depends on 6) The system according to claim 6, further comprising: the processor detecting a second voltage of the second wireless charging component is below the predetermined voltage threshold. ### Claim 9 (depends on 8) The system according to claim 8, wherein a second communication link timeout of the second wireless charging component is increased above a default communication link timeout. ### Claim 10 (depends on 8) The system according to claim 8, wherein the processor detects a primary coil current of the second wireless charging component is below a predetermined current threshold. ### Claim 11 (depends on 5) The system according to claim 5, wherein the processor detects a primary coil current of the first wireless charging component exceeding a predetermined current threshold. ### Claim 12 (depends on 5) The system according to claim 5, wherein the first voltage comprises a primary coil voltage gain. ### Claim 13 (depends on 9) The system according to claim 9, further comprising: the processor detects an absence of receipt from the second electronic device of a non-corrupt control error packet during a default communication link timeout and detects the receipt of the non-corrupt control error packet prior to the second communication link timeout, and wherein a second voltage of the second wireless charging component remains below the predetermined voltage threshold. ### Claim 14 A method for avoiding shutdown in adjacent active wireless charging components comprising: detecting, by a processor, an increase in a first voltage of a first wireless charging component above a predetermined voltage threshold; and in response to detecting the increase in the first voltage, adjusting, by the processor, a first communication link timeout of the first wireless charging component. ### Claim 15 (depends on 14) The method according to claim 14, wherein the increase in the first voltage of the first wireless charging component occurs when a first electronic device is decoupled from the first wireless charging component. ### Claim 16 (depends on 14) The method according to claim 14, wherein the first communication link timeout of the first wireless charging component is reduced below a default communication link timeout. ### Claim 17 (depends on 15) The method according to claim 15, further comprising: detecting an increase of a second voltage of a second wireless charging component adjacent to the first wireless charging component and a second electronic device coupled to the second wireless charging component, wherein the second voltage occurs when the first electronic device is decoupled from the first wireless charging component, and wherein the second voltage is below the predetermined voltage threshold. ### Claim 18 (depends on 17) The method according to claim 17, wherein a second communication link timeout of the second wireless charging component is increased above a default communication link timeout. ### Claim 19 (depends on 17) The method according to claim 17, wherein detecting a primary coil current of the second wireless charging component is below a predetermined current threshold. ### Claim 20 (depends on 18) The method according to claim 18, further comprising: detecting receipt from the second electronic device of a non-corrupt control error packet prior to the second communication link timeout.