# US 12,213,532 B2 · Electronic vapor provision system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,213,532 B2 - Document ID: US12213532B2 - Status: Granted - Kind: B2 - Application number: 18/329,693 - Filed: 2023-06-06 - Published: 2023-10-05 - Granted: 2025-02-04 - Earliest claimed: 2015-08-25 - Assignees: Nicoventures Trading Limited - Applicants: Nicoventures Trading Limited - Inventors: Kenny Otiaba - Web page: https://patentgrep.com/patent/US12213532B2 ## CPC - A24F 40/50: Control or monitoring - A24F 40/90: Arrangements or methods specially adapted for charging batteries thereof - H01M 4/5825: {Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines} - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 10/42: Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells (H01M10/60 takes precedence) - H01M 10/44: Methods for charging or discharging (circuits for charging H02J7/00) - H02J 7/345: {using capacitors as storage or buffering devices} - A24F 40/10: Devices using liquid inhalable precursors - A61M 11/042: {electrical} - A61M 15/06: Inhaling appliances shaped like cigars, cigarettes or pipes - H01M 2004/028: {Positive electrodes} - H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop - 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) - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A control unit for an electronic vapor provision system includes a battery for providing electrical power to a heater which is used to produce vapor. The battery is a lithium iron phosphate battery. The battery provides an output voltage which remains at an approximately constant voltage level as the battery is discharged. ## Claims ### Claim 1 A control unit for an electronic vapor provision system, the control unit comprising: a battery for providing electrical power to a heater and wherein an output voltage of the battery when 80% discharged by successive puffs of the electronic vapor provision system is no more than 0.25V below the output voltage of the battery when fully charged. ### Claim 2 (depends on 1) The control unit of claim 1, wherein the battery is a lithium iron phosphate battery having a lithium ferrophosphate cathode. ### Claim 3 (depends on 1) The control unit of claim 1, wherein the battery has a rated capacity in a range of 250-600 mA hours to support at least 100 puffs of the electronic vapor provision system, each puff drawing a current of at least 2.5 A from the battery. ### Claim 4 (depends on 1) The control unit of claim 1, wherein the control unit further includes a sensor to detect a user inhalation, and a controller configured to initiate provision of electrical power from the battery to the heater in response to the sensor detecting the user inhalation. ### Claim 5 (depends on 4) The control unit of claim 4, wherein in response to the sensor detecting the user inhalation, the controller is configured to provide a first phase of electrical power and then a second phase of electrical power from the battery to the heater, wherein the first phase of electrical power has a higher level of electrical current than the second phase of electrical power. ### Claim 6 (depends on 5) The control unit of claim 5, wherein the first phase of electrical power has a current level of equal to or greater than 3 amps. ### Claim 7 (depends on 6) The control unit of claim 6, wherein the first phase of electrical power has a current level of equal to or greater than 5 amps. ### Claim 8 (depends on 1) The control unit of claim 1, wherein the output voltage of the battery when half discharged is no more than 0.1V below the output voltage of the battery when fully charged. ### Claim 9 (depends on 8) The control unit of claim 8, wherein the output voltage of the battery when half discharged is no more than 0.05V below the output voltage of the battery when fully charged. ### Claim 10 (depends on 1) The control unit of claim 1, wherein the output voltage of the battery when half discharged is no more than 3% below the output voltage of the battery when fully charged. ### Claim 11 (depends on 8) The control unit of claim 8, wherein the output voltage of the battery when half discharged is no more than 1.5% below the output voltage of the battery when fully charged. ### Claim 12 (depends on 1) The control unit of claim 1, wherein the output voltage of the battery when 80% discharged is no more than 0.16V below the output voltage of the battery when fully charged. ### Claim 13 (depends on 1) The control unit of claim 1, wherein the output voltage of the battery when 80% discharged is no more than 6% below the output voltage of the battery when fully charged. ### Claim 14 (depends on 1) The control unit of claim 1, wherein the output voltage of the battery is measured under load when providing electrical power to the heater to produce vapor. ### Claim 15 (depends on 14) The control unit of claim 14, wherein the output voltage of the battery is in a range of 2.6V-3V measured under load. ### Claim 16 (depends on 15) The control unit of claim 15, wherein the output voltage of the battery is approximately 2.8V measured under load. ### Claim 17 (depends on 1) The control unit of claim 1, wherein the output voltage of the battery is in a range of 3V-3.4V for an open circuit. ### Claim 18 (depends on 17) The control unit of claim 17, wherein the output voltage is approximately 3.2V for an open circuit. ### Claim 19 (depends on 1) The control unit of claim 1, wherein electrical power is supplied from the battery to the heater without compensation for variation in output voltage of the battery over a discharge cycle. ### Claim 20 (depends on 1) An electronic vapor provision system comprising the control unit of claim 1 and the heater. ### Claim 21 (depends on 20) The electronic vapor provision system of claim 20, wherein the heater is located in a cartomizer that is connected to the control unit. ### Claim 22 (depends on 20) The electronic vapor provision system of claim 20, wherein the heater and the control unit are integrated into a single device.