# US 2021/0329974 A1 · Electrically heated aerosol-generating system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0329974 A1 - Document ID: US20210329974A1 - Status: Published application - Kind: A1 - Application number: 17/369,234 - Filed: 2021-07-07 - Published: 2021-10-28 - Earliest claimed: 2014-04-30 - Assignees: Philip Morris Products S.A. - Applicants: Philip Morris Products S.A. - Inventors: Raphael HOLZHERR - Web page: https://patentgrep.com/patent/US20210329974A1 ## CPC - A24F 40/53: Monitoring, e.g. fault detection - A24F 40/90: Arrangements or methods specially adapted for charging batteries thereof - H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries - H02J 7/445: {in response to measured battery parameters, e.g. voltage, current or temperature profile} - H05B 1/0244: {Heating of fluids (H05B1/0247 takes precedence)} - A24F 40/20: Devices using solid inhalable precursors - H02J 7/44: between battery management systems and power sources - H02J 7/975: {in response to temperature} - H05B 2203/021: Heaters specially adapted for heating liquids - Y02E 60/10: Energy storage using batteries - A24F: SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES (inhaling appliances for medical purposes, shaped like cigars, cigarettes or pipes A61M15/06) - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A controller is provided for an electrically heatable aerosol-generating device including a heating element and a rechargeable power supply to power the heating element, the controller being configured to control a supply of power from the rechargeable power supply to the heating element, and to prevent power being supplied to the heating element when a temperature reading is below a pre-determined lower temperature threshold. An electrically heatable aerosol-generating device including the heating element, the rechargeable power supply configured to power the heating element, a temperature sensor, and the controller is also provided. And, a method of controlling an electrically heatable aerosol-generating device, including the heating element and the rechargeable power supply configured to power the heating element, is also provided. ## Claims ### Claim 1 A controller for an electrically heatable aerosol-generating device comprising a heating element and a rechargeable power supply configured to power the heating element, wherein the controller is configured to control a supply of power from the rechargeable power supply to the heating element, and to prevent power being supplied to the heating element when a temperature reading is below a pre-determined lower temperature threshold. ### Claim 2 (depends on 1) The controller according to claim 1, wherein the controller is further configured to provide power to the heating element when the temperature reading is above the pre-determined lower temperature threshold. ### Claim 3 (depends on 1) The controller according to claim 1, further comprising an indicator configured to indicate to a user when power is being prevented from being supplied to the heating element. ### Claim 4 (depends on 1) The controller according to claim 1, wherein the controller is further configured to indicate to a user when power is being prevented from being supplied to the heating element by utilising at least one of: a light, a series of lights, or a display, a sound or a series of sounds, and a vibration or a series of vibrations. ### Claim 5 (depends on 1) The controller according to claim 1, wherein the controller is further configured to monitor temperature with a frequency of once per minute to and including 5 times per minute. ### Claim 6 (depends on 1) The controller according to claim 1, wherein the controller is further configured to prevent power being supplied to the heating element when the temperature reading is above a pre-determined higher temperature threshold. ### Claim 7 (depends on 6) The controller according to claim 6, wherein the controller is further configured to provide power to the heating element when the temperature reading is below the pre-determined higher temperature threshold, and/or the controller is further configured to indicate to a user when power is being prevented from being supplied to the heating element. ### Claim 8 (depends on 1) An electrically heatable aerosol-generating device comprising a heating element, a rechargeable power supply configured to power the heating element, a temperature sensor, and a controller according to claim 1. ### Claim 9 A method of controlling an electrically heatable aerosol-generating device comprising a heating element and a rechargeable power supply configured to power the heating element, the method comprising: providing power to a heating element from the rechargeable power supply; and preventing power being supplied to the heating element when a temperature reading is below a pre-determined lower temperature threshold. ### Claim 10 (depends on 9) The method according to claim 9, further comprising providing power to the heating element from the rechargeable power supply when the temperature reading is above the pre-determined lower temperature threshold, and/or indicating to a user when power is being prevented from being supplied to the heating element. ### Claim 11 (depends on 9) The method according to claim 9, further comprising indicating to a user when power is being prevented from being supplied to the heating element by utilising at least one of: a light, a series of lights, or a display, a sound or a series of sounds, and a vibration or a series of vibrations. ### Claim 12 (depends on 9) The method according to claim 9, further comprising preventing power being supplied to the heating element when the temperature reading is above a pre-determined higher temperature threshold. ### Claim 13 (depends on 12) The method according to claim 12, further comprising: providing power to the heating element when the temperature reading is below the pre-determined higher temperature threshold; and/or indicating to a user when power is being prevented from being supplied to the heating element. ### Claim 14 A controller for recharging a rechargeable power supply of an electrically heatable aerosol-generating system, wherein the controller is configured to: provide a charging current of less than about 0.1 C to the rechargeable power supply when a temperature reading is within a first pre-determined range, provide a charging current of greater than about 0.1 C to the rechargeable power supply when the temperature reading is within a second pre-determined range, and prevent charging of the rechargeable power supply when the temperature reading is above a pre-determined temperature. ### Claim 15 (depends on 14) The controller according to claim 14, further comprising an indicator configured to indicate to a user which charging current is being provided. ### Claim 16 (depends on 14) The controller according to claim 14, wherein the controller is further configured to indicate to a user which charging current is being provided by utilising at least one of: a light, a series of lights, or a display, a sound or a series of sounds, and a vibration or a series of vibrations. ### Claim 17 (depends on 14) The controller according to claim 14, wherein the controller is further configured to monitor temperature with a frequency of once per minute to and including 5 times per minute. ### Claim 18 (depends on 14) The controller according to claim 14, wherein the controller is further configured to: receive an input from a user requesting that the rechargeable power supply is fast charged, and provide a charging current of about 1 C to the rechargeable power supply when the temperature reading is within the second pre-determined range and when the controller receives an input from a user requesting that the rechargeable power supply is fast charged. ### Claim 19 A method for recharging a rechargeable power supply of an electrically heatable aerosol-generating system, wherein the method comprises: providing a charging current of less than about 0.1 C to the rechargeable power supply when a temperature reading is within a first pre-determined range; providing a charging current of greater than about 0.1 C to the rechargeable power supply when the temperature reading is within a second pre-determined range; and preventing charging of the rechargeable power supply when the temperature reading is above a pre-determined temperature. ### Claim 20 (depends on 19) The method according to claim 19, further comprising indicating to a user which charging current is being provided by utilising at least one of: a light, a series of lights, or a display, a sound or a series of sounds, and a vibration or a series of vibrations. ### Claim 21 (depends on 19) The method according to claim 19, further comprising monitoring temperature with a frequency of once per minute to and including 5 times per minute. ### Claim 22 (depends on 19) The method according to claim 19, further comprising: receiving an input from a user requesting that the rechargeable power supply is fast charged; and providing a charging current of about 1 C to the rechargeable power supply when the temperature reading is within the second pre-determined range and when the controller receives an input from a user requesting that the rechargeable power supply is fast charged.