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WO2025201963A1 - Circuit de commande pour dispositif de génération d'aérosol, ensemble carte de circuit imprimé et système de génération d'aérosol - Google Patents

Circuit de commande pour dispositif de génération d'aérosol, ensemble carte de circuit imprimé et système de génération d'aérosol

Info

Publication number
WO2025201963A1
WO2025201963A1 PCT/EP2025/057354 EP2025057354W WO2025201963A1 WO 2025201963 A1 WO2025201963 A1 WO 2025201963A1 EP 2025057354 W EP2025057354 W EP 2025057354W WO 2025201963 A1 WO2025201963 A1 WO 2025201963A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal
semiconductor switch
control
aerosol generating
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2025/057354
Other languages
English (en)
Inventor
Bernhard Groiss
Jorge PENA
Hua Tan
Xiaowei Ye
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JT International SA
Original Assignee
JT International SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JT International SA filed Critical JT International SA
Publication of WO2025201963A1 publication Critical patent/WO2025201963A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/46—Shape or structure of electric heating means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • H05B6/108—Induction heating apparatus, other than furnaces, for specific applications using a susceptor for heating a fluid
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/50—Control or monitoring

Definitions

  • the present disclosure relates generally to a control circuit for an aerosol generating device, and in particular a device that is adapted to heat aerosol generating material to generate an aerosol for inhalation by a user.
  • the aerosol generating device may comprise an energy storage device and a heater for heating the aerosol generating material.
  • the heater may be part of a separate aerosol generating article where the aerosol generating device is adapted to receive the aerosol generating article in use.
  • the aerosol generating material may also be part of the aerosol generating article.
  • the control circuit may be used to control the supply of power from the energy storage device to the heater. Consequently, the heating of the aerosol generating material may be controlled.
  • the present disclosure also relates generally to a printed circuit board assembly, and in particular a printed circuit board assembly that has a printed circuit board and electronic components that are mounted to the circuit board.
  • the electronic components may implement the control circuit.
  • the present disclosure also relates generally to an aerosol generating system.
  • the aerosol generating system may include an aerosol generating device that includes the control circuit, and optionally an aerosol generating article.
  • the present disclosure is particularly applicable to a portable (hand-held) aerosol generating device.
  • a commonly available reduced-risk or modified-risk device is the heated material aerosol generating device, or so-called heat-not-bum device.
  • Devices of this type generate an aerosol or vapour by heating an aerosol generating material to a temperature typically in the range 150°C to 300°C. This temperature range is quite low compared to an ordinary cigarette. Heating the aerosol generating material to a temperature within this range, without burning or combusting the aerosol generating material, generates a vapour which typically cools and condenses to form an aerosol for inhalation by a user of the device.
  • the aerosol generating material may be a solid or liquid.
  • the aerosol generating article may include a solid or semi-solid substrate of plant derived material, such as tobacco, or it may include a wick and a heater to produce vapour from aerosol generating liquid stored in a capsule or tank.
  • plant derived material such as tobacco
  • An aerosol generating article (sometimes called a pod or cartridge) may be received in the aerosol generating device and may include a liquid store, a liquid transfer element (e.g., a wick) and a heater.
  • Electrical contacts may provide an electrical connection between the heater and an energy storage device of the aerosol generating device.
  • the energy storage device may be a rechargeable battery that may be charged from an external power source by a charging assembly of the aerosol generating device.
  • the supply of power from the energy storage device to the heater may be controlled by a control circuit.
  • the control circuit will typically include only one semiconductor switch (e.g., a single metal-oxide-semi conductor field-effect transistor (MOSFET)) electrically connected between the energy storage device and the heater. Power is supplied to the heater when the semiconductor switch is switched on (i.e., in an on- state).
  • the semiconductor switch may be switched on and off by a microcontroller unit (MCU) of the control circuit so as to control or regulate the supply of power to the heater.
  • MCU microcontroller unit
  • the gate terminal of the second semiconductor switch When the third semiconductor switch is in the on-state, the gate terminal of the second semiconductor switch is electrically connected to ground - i.e., it receives a low level signal at its gate terminal and the second semiconductor switch is also in the on-state if it is a P-channel MOSFET, for example.
  • the gate terminal of the second semiconductor switch When the third semiconductor switch is in the off-state, the gate terminal of the second semiconductor switch is electrically isolated from ground and is electrically connected to its source terminal by the capacitor.
  • the second semiconductor switch therefore receives a high level signal at its gate terminal and the second semiconductor switch is in the off-state if it is a P-channel MOSFET, for example.
  • the MCU may therefore switch the second semiconductor switch on and off (i.e., between on- and off-states) by switching the second control signal that is applied to the control terminal of the third semiconductor switch between high and low voltage levels.
  • the first semiconductor switch will be in the on-state when the MCU outputs a low level signal from the first control terminal of the MCU (i.e., when the first control signal has a low voltage level) and will be in the off-state when the MCU outputs a high level signal from the first control terminal of the MCU (i.e., when the first control signal has a high voltage level).
  • the second semiconductor switch will be in the off-state when the MCU outputs a low level signal from the second control terminal of the MCU (i.e., when the second control signal has a low voltage level) and in the on-state when the MCU outputs a high level signal from the second control terminal of the MCU (i.e., when the second control signal has a high voltage level).
  • the third semiconductor switch is also in the on-state and the gate terminal of the second semiconductor switch is electrically connected to ground through the third semiconductor switch.
  • the first semiconductor switch will be in the on-state and the second semiconductor switch will be in the off-state.
  • the fault with the MCU causes a high level signal to be output on both the first and second control terminals, it means that the first semiconductor switch will be in the off-state and the second semiconductor switch will be in the on-state.
  • the heater terminal will be electrically isolated from the energy storage device terminal. This may be contrasted with a known control circuit that has a single semiconductor switch electrically connected between the energy storage device terminal and the heater terminal, and where there is a risk that the semiconductor switch remains in the on-state if there is a fault with the MCU.
  • the second switch circuit may comprise a filter capacitor and a filter resistor.
  • the second switch circuit may comprise a second switch resistor.
  • the second switch resistor and the filter capacitor may be electrically connected in series between the control terminal of the third semiconductor switch and the second control terminal of the MCU.
  • the filter resistor may be electrically connected to a junction between the filter capacitor and the control terminal of the third semiconductor switch.
  • the filter resistor may also be electrically connected to ground.
  • the filter capacitor and the filter resistor may form a high-pass filter to cut off low frequency noise which may cause unexpected switching of the third semiconductor switch.
  • other types of filter circuit e.g., low-pass or band-pass filters
  • the first and second semiconductor switches may be switched on when it is necessary to supply power from the energy storage device to the heater to start to heat the aerosol generating material - e.g., at the start of a pre-heating phase.
  • the first and second semiconductor switches may be switched off at the end of a heating phase during which the aerosol generating material is heated to generate an aerosol for inhalation by a user of the aerosol generating device (e.g., at the end of a vaping session).
  • the solid or semi-solid aerosol generating material may be heated by a heater that is provided as part of the aerosol generating article or the aerosol generating device - e.g., arranged adjacent to a heating space or chamber of the aerosol generating device that is adapted to receive the aerosol generating article in use.
  • the aerosol generating material may comprise an aerosol-former. Examples of aerosol-formers include polyhydric alcohols and mixtures thereof such as glycerine or propylene glycol.
  • the aerosol generating material may comprise an aerosolformer content of between approximately 5% and approximately 50% on a dry weight basis.
  • the aerosol generating material may comprise an aerosol -form er content of between approximately 10% and approximately 22% on a dry weight basis, and possibly approximately 15% on a dry weight basis.
  • control circuit includes a microcontroller unit (MCU) 20.
  • MCU microcontroller unit
  • the control circuit includes a first semiconductor switch QI and a second semiconductor switch Q2.
  • the first and second semiconductor switches QI and Q2 are P-channel MOSFETs.
  • a drain terminal of the first semiconductor switch QI is electrically connected to a positive heater terminal H+.
  • a negative heater terminal H- is electrically connected to ground (e.g., the ground plane of the PCBA 8).
  • the heater 14 is electrically connected to the positive and negative heater terminals H+ and H-.
  • the heater 14 may be of any suitable type, e.g., a resistive heater, an induction heater, or a combination thereof. The heater 14 will operate as a heating element by consuming power from the battery 10.
  • a gate terminal of the second semiconductor switch Q2 is electrically connected to the second control terminal 24 of the MCU 20 by a second switch circuit 28.
  • the second switch circuit 28 includes a third semiconductor switch Q3, a filter capacitor Cl, a filter resistor R2, and a second switch resistor R3.
  • the third semiconductor switch Q3 is a N-channel MOSFET, but it may also be a NPN bipolar transistor, for example.
  • the source terminal of the third semiconductor switch Q3 is electrically connected to ground.
  • the drain terminal of the third semiconductor switch Q3 is electrically connected to the gate terminal of the second semiconductor switch Q2.
  • the filter capacitor Cl and the second switch resistor R3 are electrically connected in series between the gate terminal of the third semiconductor switch Q3 and the second control terminal 24 of the MCU.
  • the filter resistor R2 is electrically connected between ground and the junction of the filter capacitor Cl and the gate terminal of the third semiconductor switch Q3.
  • the source terminal of the second semiconductor switch Q2 is electrically connected to the gate terminal of the second semiconductor switch Q2 by a capacitor C2 and a resistor R5.
  • the capacitor C2 and the resistor R5 are electrically connected in parallel.
  • the resistor R5 may isolate the source and gate terminals of the second semiconductor switch Q2 if a stable voltage is applied to its gate terminal and may also prevent an indefinite state of the gate terminal of the second semiconductor switch Q2 if a stable is not applied to the gate terminal.
  • the MCU 20 When power is not being supplied to the heater 14 (e.g., before the start of a pre-heating phase), the MCU 20 outputs a high level signal from the first control terminal 22 to the gate terminal of the first semiconductor switch QI so that it is switched off (i.e., in the off-state).
  • the MCU 20 outputs a low level signal from the second control terminal 24 to the gate terminal of the third semiconductor switch Q3 so that it is switched off (i.e., in the off-state).
  • the second semiconductor switch Q2 is also switched off (i.e., in the off-state).
  • an electrical potential of the first control terminal 22 may be indefinite.
  • the MCU 20 When power is to be supplied from the battery 10 to the heater 14, i.e., from the positive battery terminal B+ to the positive heater terminal H+, the MCU 20 outputs a high level signal from the second control terminal 24 to the gate terminal of the third semiconductor switch Q3 so that it is switched on (i.e., switched to the on-state).
  • the gate terminal of the second semiconductor switch Q2 is electrically connected to ground through the third semiconductor switch Q3 and is also switched on (i.e., switched to the on-state).
  • a stable voltage is then supplied to the source terminal of the first semiconductor switch QI through the second semiconductor switch Q2. This stable voltage allows the first semiconductor switch QI to be reliably switched on.
  • the second semiconductor switch Q2 may be maintained in the on-state and the MCU 20 may repeatedly switch the first semiconductor switch QI on and off (i.e., between the on- and off-states) to regulate the power supplied from the battery 10 to the heater 14. This may be used to regulate or control the heating of the aerosol generating material (not shown), e.g., during a heating phase of the aerosol generating system 1.
  • the MCU 20 will continue to output a high level signal from the second control terminal 24 to the gate terminal of the third semiconductor switch Q3.
  • the first semiconductor switch QI is repeatedly switched on and off (i.e., between the on- and off-states) by repeatedly switching the voltage level of the first control signal between high and low voltage levels. The switching between the high and low voltage levels may be controlled using pulse width modulation or pulse frequency modulation, for example.
  • the MCU 20 When power no longer needs to be supplied from the battery 10 to the heater 14, i.e., from the positive battery terminal B+ to the positive heater terminal H+, the MCU 20 outputs a high level signal from the first control terminal 22 to the gate terminal of the first semiconductor switch QI so that it is switched off (i.e., switched to the off-state).
  • the positive heater terminal H+ is now electrically isolated from the positive battery terminal B+ by the first semiconductor switch QI. A stable voltage is still supplied to the source terminal of the second semiconductor switch Q2 and this allows the second semiconductor switch Q2 to be reliably switched off.
  • the MCU 20 outputs a low level signal from the second control terminal 24 to the gate terminal of the third semiconductor switch Q3 so that it is switched off (i.e., switched to the off-state).
  • the gate terminal of the second semiconductor switch Q2 is no longer electrically connected to ground through the third semiconductor switch Q3 and is also switched off (i.e., to the off-state).
  • switching delays because of the differences in the first and second switch circuits 26, 28 means that the MCU 20 may start to output the high level signal from the first control terminal 22 and the low level signal from the second control terminal 24 at the same time. Such a delay may be beneficial because it prevents simultaneous switching of the first and second semiconductor switches QI and Q2. Such simultaneous switching may result in unexpected behaviour due to switching noise.
  • the capacitor C2 may also contribute to the switching delay because some time is needed to discharge the electrical charge that is stored in the capacitor C2.
  • the first and second semiconductors switches QI and Q2 are electrically connected in series between the positive battery terminal B+ and the positive heater terminal H+.
  • a positive control mechanism is employed.
  • a fourth semiconductor switch (not shown) may additionally be provided between the negative heater terminal H- and ground. Adding a fourth semiconductor switch between the negative heater terminal H- and ground may provide a further improvement in the safety of the aerosol generating device 2.
  • the fourth semiconductor switch may be switched on any off by the MCU 20.
  • each wire may extend through the body of the printed circuit board 30 from the bottom surface 30b to the top surface 30a where it is soldered to a respective solder point.
  • This provides a convenient and simplified implementation of the PCBA 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Un circuit de commande pour un dispositif de génération d'aérosol est décrit. Le circuit de commande comprend une borne de dispositif de stockage d'énergie (B+) et une borne de dispositif de chauffage (H+ ; H-). Des premier et second commutateurs à semi-conducteur (Q1, Q2) sont connectés électriquement en série entre la borne de dispositif de stockage d'énergie (B+) et la borne de dispositif de chauffage (H+) ou entre la borne de dispositif de chauffage (H-) et la masse. Une unité microcontrôleur (20) du circuit de commande comporte une première borne de commande (22) et une seconde borne de commande (24). La première borne de commande (22) de l'unité microcontrôleur (20) est électriquement connectée à une borne de commande du premier commutateur à semi-conducteur (Q1) par un premier circuit de commutation (26). La seconde borne de commande (24) de l'unité microcontrôleur (20) est électriquement connectée à une borne de commande du second commutateur à semi-conducteur (Q2) par un second circuit de commutation (28).
PCT/EP2025/057354 2024-03-25 2025-03-18 Circuit de commande pour dispositif de génération d'aérosol, ensemble carte de circuit imprimé et système de génération d'aérosol Pending WO2025201963A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP24165874 2024-03-25
EP24165874.9 2024-03-25

Publications (1)

Publication Number Publication Date
WO2025201963A1 true WO2025201963A1 (fr) 2025-10-02

Family

ID=90468802

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2025/057354 Pending WO2025201963A1 (fr) 2024-03-25 2025-03-18 Circuit de commande pour dispositif de génération d'aérosol, ensemble carte de circuit imprimé et système de génération d'aérosol

Country Status (1)

Country Link
WO (1) WO2025201963A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2100525A1 (fr) * 2008-03-14 2009-09-16 Philip Morris Products S.A. Système de génération d'aérosol à chauffage électrique et procédé
EP3692828A1 (fr) * 2017-10-18 2020-08-12 Japan Tobacco Inc. Dispositif de formation de substance d'inhalation, procédé de commande de dispositif de formation de substance d'inhalation et programme
EP3711520A1 (fr) * 2019-03-22 2020-09-23 Nerudia Limited Système de substitution du tabac

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2100525A1 (fr) * 2008-03-14 2009-09-16 Philip Morris Products S.A. Système de génération d'aérosol à chauffage électrique et procédé
EP3692828A1 (fr) * 2017-10-18 2020-08-12 Japan Tobacco Inc. Dispositif de formation de substance d'inhalation, procédé de commande de dispositif de formation de substance d'inhalation et programme
EP3711520A1 (fr) * 2019-03-22 2020-09-23 Nerudia Limited Système de substitution du tabac

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