# US 12,184,081 B2 · Apparatus for wireless charging, terminal and charging method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,184,081 B2 - Document ID: US12184081B2 - Status: Granted - Kind: B2 - Application number: 17/488,113 - Filed: 2021-09-28 - Published: 2022-10-06 - Granted: 2024-12-31 - Earliest claimed: 2021-03-30 - Assignees: Beijing Xiaomi Mobile Software Co., Ltd. - Applicants: Beijing Xiaomi Mobile Software Co., Ltd. - Inventors: Guangshuai Lu; Kaiqi Wu - Web page: https://patentgrep.com/patent/US12184081B2 ## CPC - H02J 50/10: using inductive coupling - H02J 7/02: for charging batteries from AC mains by converters - H02J 7/42: with electronic devices having internal batteries, e.g. mobile phones - H02J 7/65: against overtemperature - H02J 7/80: including monitoring or indicating arrangements - H02J 7/933: {the cycle being controlled or terminated in response to electric parameters} - H02J 7/975: {in response to temperature} - H02J 50/80: involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY ## Abstract An apparatus for wireless charging includes a charger, a wireless transmitting controller and a transmitting coil. The charger is configured to output a first voltage to the wireless transmitting controller. The wireless transmitting controller is configured to boost the first voltage to obtain a second voltage, and the second voltage is greater than the first voltage. The transmitting coil is configured to perform a wireless charging capability output at the second voltage. A terminal includes a wireless receiving coil, a wireless receiving controller and a step-down processor. The wireless receiving coil receives the charging signal from an apparatus for wireless charging. The wireless receiving controller processes the charging voltage to obtain a third voltage of direct current; and the step-down processor steps down the third voltage to obtain a fourth voltage within a charging range acceptable by the terminal and charge a battery of the terminal by the fourth voltage. ## Claims ### Claim 1 An apparatus for wireless charging, comprising: a charger, a wireless transmitting controller, a transmitting coil, a first communication module and a heat dissipation fan; wherein, the charger is configured to output a first voltage to the wireless transmitting controller; the wireless transmitting controller is configured to boost the first voltage to obtain a second voltage, wherein the second voltage is greater than the first voltage; the transmitting coil is configured to perform wireless charging at the second voltage; the first communication module is configured to communicate with a terminal, and configured to determine a target voltage for performing wireless charging output to the terminal; the wireless transmitting controller is configured to set the second voltage as the target voltage and boost the first voltage to obtain the target voltage; the first communication module is configured to determine an operating strength of the heat dissipation fan according to the target voltage by communicating with the terminal, and the heat dissipation fan is configured to operate according to the operating strength; or the first communication module is configured to determine an operating state and an operating strength of the heat dissipation fan according to the target voltage by communicating with the terminal, and the heat dissipation fan is configured to operate according to the operating state and the operating strength. ### Claim 2 (depends on 1) The apparatus according to the claim 1, wherein the first communication module is configured to determine the target voltage when establishing a connection with the terminal; and/or, in a process of wireless charging, determine the target voltage by communicating with the terminal. ### Claim 3 (depends on 1) The apparatus according to the claim 1, wherein the first communication module comprises: a first communication unit, configured to receive the target voltage sent by the terminal, wherein the target voltage comprises a target voltage value or a target voltage level; the target voltage is determined by the terminal according to a terminal status; or a second communication unit, configured to obtain a terminal status of the terminal and determine the target voltage according to the terminal status, wherein the target voltage comprises a target voltage value or a target voltage level. ### Claim 4 (depends on 1) The apparatus according to the claim 1, wherein the wireless transmitting controller comprises: a boost circuit and/or a wireless transmitting control chip. ### Claim 5 (depends on 1) The apparatus according to the claim 1, wherein, the wireless transmitting controller is configured to boost the first voltage to obtain a second voltage of at least 30V; and the transmitting coil is configured to perform the wireless charging capability output at the second voltage of at least 30V. ### Claim 6 (depends on 1) A terminal, comprising: a wireless receiving coil, a wireless receiving controller and a step-down processor; wherein the wireless receiving coil is configured to receive a charging signal from an apparatus for wireless charging according to claim 1, and a charging voltage corresponding to the charging signal is higher than a preset voltage; the wireless receiving controller is configured to process the charging voltage received by the wireless receiving coil to obtain a third voltage of direct current; and the step-down processor is configured to step down the third voltage to obtain a fourth voltage within a charging range acceptable by the terminal, and charge a battery of the terminal by the fourth voltage. ### Claim 7 (depends on 6) The terminal according to claim 6, wherein the wireless receiving controller comprises a step-down circuit and/or a wireless receiving control chip. ### Claim 8 (depends on 6) The terminal according to claim 6, wherein step-down levels of the step-down processor respectively comprise 6:2, 4:2, and 2:2, wherein, in response to the third voltage corresponding to a high voltage range, the step-down processor is configured to step down the third voltage by a step-down level of 6:2; in response to the third voltage corresponding to a medium voltage range, the step-down processor is configured to step down the third voltage by a step-down level of 4:2; in response to the third voltage corresponding to a low voltage range, the step-down processor is configured to step down the third voltage by a step-down level of 2:2. ### Claim 9 (depends on 1) A charging method, applicable for a terminal and comprising: receiving a charging signal from an apparatus for wireless charging according to claim 1, wherein a charging voltage corresponding to the charging signal is higher than a preset voltage; processing the charging voltage received by a wireless receiving coil of the terminal to obtain a third voltage of direct current; and stepping down the third voltage to obtain a fourth voltage within a charging range acceptable by the terminal, and charging a battery of the terminal by the fourth voltage. ### Claim 10 (depends on 9) The method according to claim 9, comprising: communicating with the apparatus for wireless charging; and determining a charging voltage of the apparatus for wireless charging. ### Claim 11 (depends on 10) The method according to claim 10, comprising: determining a charging voltage of the apparatus for wireless charging when establishing a connection with the apparatus for wireless charging; and/or in a process of wireless charging, determining the charging voltage of the apparatus for wireless charging by communicating with the apparatus for wireless charging. ### Claim 12 (depends on 9) The method according to claim 9, comprising: when a charging abnormality occurs, processing the abnormality to generate a fifth voltage, and sending the fifth voltage to the apparatus for wireless charging. ### Claim 13 (depends on 12) The method according to claim 12, wherein processing the abnormality to generate the fifth voltage and sending the fifth voltage to the apparatus for wireless charging comprises: in response to the abnormality being a high temperature alarm, reducing the charging voltage to the fifth voltage, and sending the fifth voltage to the apparatus for wireless charging; and/or in response to the abnormality being a power failure, communicating with the apparatus for wireless charging to restart charging with a low level voltage. ### Claim 14 (depends on 9) The method according to claim 9, comprising: determining a step-down level according to the third voltage; and stepping down the third voltage according to the step-down level. ### Claim 15 (depends on 9) The method according to claim 9, wherein step-down levels respectively comprise 6:2, 4:2, and 2:2, and stepping down the third voltage comprises: in response to the third voltage corresponding to a high voltage range, stepping down the third voltage by a step-down level of 6:2; in response to the third voltage corresponding to a medium voltage range, stepping down the third voltage by a step-down level of 4:2; in response to the third voltage corresponding to a low voltage range, stepping down the third voltage by a step-down level of 2:2. ### Claim 16 (depends on 15) The method according to claim 15, wherein, the high voltage range is 30V, the middle voltage range is 20V, and the low voltage range is 10V. ### Claim 17 (depends on 10) The method according to claim 10, wherein communicating with the apparatus for wireless charging comprises: sending a target voltage to the apparatus for wireless charging, wherein the target voltage comprises a target voltage value or a target voltage level, and the target voltage is determined by the terminal according to a terminal status; or sending a terminal status of the terminal to the apparatus for wireless charging. ### Claim 18 (depends on 17) The method according to claim 17, wherein communicating with the apparatus for wireless charging comprises: sending a fan control instruction to the apparatus for wireless charging.