Battery monitoring for aerosol generators

Abstract

An aerosol generating device (100) is provided, including an indicator (104) and a controller (102) connectable to a battery (106) and a heater (108). The heater is configurable to aerosolize units of aerosol-generating material in an aerosolization session, and the battery is configurable to provide power to the heater for one or more aerosolization sessions. The controller is configured to measure a charge level of the battery, determine whether the measured charge level is sufficient for only a predetermined number N of aerosolization sessions by the heater, and indicate when the measured charge level is sufficient for only N aerosolization sessions by the heater using the indicator in a first manner.

Description

[Technical field]

[0001] The present invention relates to aerosol generating devices, and more particularly to battery monitoring for aerosol generating devices. [Background technology]

[0002] Aerosol generating devices, such as e-cigarettes and other aerosol inhalers or vaporizers, are increasingly popular consumer products.

[0003] Heating devices for vaporization or aerosolization are known in the art. Such devices typically include a heater arranged to heat a vaporizable or aerosolizable product. In operation, the vaporizable or aerosolizable product is heated by the heater, vaporizing or aerosolizing the product's ingredients for inhalation by the consumer. In some examples, the product may include tobacco leaves and may resemble a traditional cigarette, while in other examples, the product may be a liquid or liquid contents within a capsule. Summary of the Invention [Problem to be solved by the invention]

[0004] In such devices, accurate battery monitoring is necessary.It is therefore an object of the present invention to address such a problem. [Means for solving the problem]

[0005] According to a first aspect, there is provided an aerosol generating device including an indicator and a controller connectable to a battery and a heater, wherein the heater is configurable to aerosolize units of aerosol-generating material in an aerosolization session, the battery is configurable to supply power to the heater for one or more aerosolization sessions, and the controller is configured to measure a charge level of the battery and determine whether the measured charge level is sufficient for only a predetermined number N of aerosolization sessions by the heater, and configured to use the indicator in a first manner to indicate when the measured charge level is sufficient for only N aerosolization sessions by the heater.

[0006] In this way, a warning can be provided to a user of the aerosol generating device when there is enough battery power remaining for only N aerosolization sessions, allowing the user to anticipate the need to charge the battery before it runs out, thereby eliminating the risk of running out of power while using the device.

[0007] Preferably, an aerosolization session includes a heating regime performed by a heater to aerosolize one aerosol-generating material consumable. Preferably, the aerosol-generating material is tobacco leaf. Preferably, the unit of aerosol-generating material includes one tobacco rod (similar to a conventional cigarette). Alternatively, the aerosol-generating material may be a liquid that forms a vapor, and the unit of aerosol-generating material may include a capsule of the liquid that forms a vapor. Preferably, the aerosolization includes heating the aerosol-generating material without combustion to generate the aerosol or vapor. Preferably, the indicator is at least one of a visual indicator, an audio indicator, or a tactile indicator. The indicator may include one indicator operable in one or more ways, or multiple indicators operable in one or more ways. Preferably, the predetermined number N of aerosolization sessions is one (N=1), representing a battery with enough power remaining for only one aerosolization session. In another example, N=2, representing a battery with enough power remaining for only two aerosolization sessions. In another example, N may be equal to the total number of units of aerosol-generating material (or tobacco rods) in the packet, e.g., N = 20. However, one of ordinary skill in the art will readily appreciate that N may be any other suitable positive integer number.

[0008] Preferably, when determining whether the measured charge level is sufficient for only N aerosolization sessions by the heater, the controller is further configured to compare the measured charge level with a first predetermined charge level and a second predetermined charge level, the first predetermined charge level corresponding to a battery whose charge level is insufficient for N+1 aerosolization sessions and the second predetermined charge level corresponding to a battery whose charge level is sufficient for N aerosolization sessions, and is configured to determine that the measured charge level is sufficient for only N aerosolization sessions when the measured charge level is less than the first predetermined charge level and greater than or equal to the second predetermined charge level.

[0009] In this manner, the controller can determine when and only when there is enough power remaining in the battery to fully aerosolize the N aerosol-generating material consumables.

[0010] Preferably, the controller is configured to measure the charge level of the battery before each aerosolization session, and / or configured to measure the charge level of the battery after each aerosolization session, and / or configured to measure the charge level of the battery when the heater is switched off.

[0011] Measuring the charge level and determining and indicating before each aerosolization session when the measured charge level is sufficient for only a predetermined number N of aerosolization sessions is advantageous because it allows the user to be aware before the aerosolization session that the battery charge remains for only N sessions. This is particularly advantageous when the predetermined number N is 1, because the user is informed before the aerosolization session that this is the last aerosolization session for which the battery charge will be sufficient.

[0012] Measuring the charge level and determining and indicating after each aerosolization session when the measured charge level is sufficient for only a predetermined number N of aerosolization sessions is advantageous because after an aerosolization session is terminated, the user will be alerted if the battery level is sufficient for only N more sessions. This is particularly advantageous when the predetermined number N is 1, as the user will be informed that the next aerosolization session is the last aerosolization session for which the battery has sufficient charge.

[0013] Measuring the charge level after switching off the heater allows a more accurate measurement of the battery charge level since there is no heating load applied.

[0014] Preferably, the aerosol generating device further includes a closable opening through which the aerosol generating material is received, and the controller is configured to measure the charge level of the battery when it determines that the closable opening has moved to the closed position, and / or is configured to measure the charge level of the battery when it determines that the closable opening has moved to the open position.

[0015] In this manner, the charge level measurement may be triggered by a user action at the end of an aerosolization session (determining that the closeable opening has moved to a closed position) or at the beginning of an aerosolization session (determining that the closeable opening has moved to an open position), such that triggering allows the indication in the first manner to be displayed at either the end or beginning of an aerosolization session as appropriate.

[0016] Preferably, upon determining that the closable opening has been moved to the closed position, the controller is further configured to switch off the heater before determining the charge level of the battery.

[0017] Preferably, upon determining that the closable opening has moved to the open position, the controller is further configured to initiate a standby mode during which the charge level of the battery is measured, and, in response to determining that the charge level of the battery is sufficient for at least one complete aerosolization session by the heater, to switch on the heater and terminate the standby mode.

[0018] In this way, a measurement of the charge level can be made specifically before the heater is switched on, which can improve the accuracy of the measurement.

[0019] Preferably, the controller is further configured to determine whether the measured charge level is sufficient for at least one complete aerosolization session by the heater, and configured to automatically switch on the heater in response to determining that the battery charge level is sufficient for at least one complete aerosolization session by the heater, or configured to switch on the heater in response to detecting an activation command when the battery charge level is sufficient for at least one complete aerosolization session by the heater.

[0020] In this way, the heater is switched on only when there is enough power for a complete aerosolization session, thereby preventing the aerosol generating device from only partially aerosolizing a unit of aerosol-generating material because the battery runs out of charge before the aerosolization session is completed.

[0021] Preferably, the indicator comprises at least one light emitting source included in the aerosol generating device.

[0022] In this way, the indication can be visually conveyed to the user of the device.

[0023] Preferably, the controller is further configured to determine whether the measured charge level of the battery is lower than the level required for one complete aerosolization session with the heater, and in response to a determination that the charge level of the battery is lower than the level required for one complete aerosolization session, use the indicator in a second manner to indicate that the measured charge level is insufficient for one complete aerosolization session with the heater.

[0024] In this way, the user is notified when there is insufficient power for a complete aerosolization session, thereby preventing the user from being midway through an aerosolization session only to have a unit of aerosol-generating material partially aerosolized because the battery ran out of charge before the aerosolization session was completed, thereby avoiding the potential waste of a unit of aerosol-generating material due to it only being partially aerosolized.

[0025] Preferably, the second method of using the indicator is different to the first method of using the indicator. Preferably, the first method involves illuminating the light source with a first flash frequency or pattern and the second method involves illuminating the light source with a second, different flash frequency or pattern. Alternatively, the first method involves illuminating the light source with a first color and the second method involves illuminating the light source with a second, different color. The light source used in the first method may be the same light source as the light source used in the second method or may be a different light source.

[0026] Preferably, the controller is further configured to determine that the measured charge level is lower than the level required for one complete aerosolization session by the heater in response to performing one aerosolization session after determining that the measured charge level is sufficient for only one complete aerosolization session by the heater.

[0027] In this way, it can be automatically determined that the charge level is insufficient for a heater aerosolization session.

[0028] Preferably, when measuring the charge level, the controller is configured to measure a voltage of the battery, and to compare the measured battery voltage with a predetermined battery voltage having a corresponding predetermined battery charge level, and to determine the measured battery charge level based on a comparison between the measured battery voltage and the predetermined battery voltage and the corresponding predetermined battery charge level.

[0029] In this manner, the charge level of the battery can be measured using a measurement of the battery voltage, thereby providing accuracy in the measured battery charge level.

[0030] Preferably, the predetermined battery voltage and the corresponding predetermined battery charge level are stored in a memory accessible to the controller.

[0031] Preferably, the controller is further configured to determine the available number of aerosolization sessions that can be sufficiently powered by the battery based on the measured charge level, and to use the indicator in a third manner to display an indication of the available number of aerosolization sessions that can be sufficiently powered by the battery.

[0032] In this way, the user of the aerosol generating device can be informed about the remaining number of aerosolization sessions available, allowing the user to plan for an aerosolization session before charging the battery, rather than being abruptly informed that the charge level is too low for an aerosolization session, thereby improving the user experience.

[0033] Preferably, displaying an indication of the available number of aerosolization sessions that can be sufficiently powered by the heater includes illuminating a number of light sources corresponding to the available number of aerosolization sessions.

[0034] According to a second aspect, there is provided an aerosol generation device system comprising an aerosol generation device according to the first aspect, further comprising a battery and a heater.

[0035] According to a third aspect, there is provided a method of operating an aerosol generating device including an indicator and a controller connectable to a battery and a heater, the heater being configurable to aerosolize units of aerosol-generating material in an aerosolization session and the battery being configurable to supply power to the heater for one or more aerosolization sessions, the method comprising: measuring, by the controller, a charge level of the battery; determining, by the controller, whether the measured charge level is sufficient for only a predetermined number N of aerosolization sessions by the heater; and using the indicator in a first manner to indicate when the measured charge level is sufficient for only N aerosolization sessions by the heater.

[0036] Preferably, the third aspect includes the preferred features of the first aspect.

[0037] According to a fourth aspect, there is provided a non-transitory computer-readable medium storing instructions that, when executed by one or more processors, cause the one or more processors to control an aerosol generating device, the aerosol generating device including an indicator and a controller connectable to a battery and a heater, the heater being configurable to aerosolize units of aerosol-generating material in an aerosolization session, the battery being configurable to provide power to the heater for one or more aerosolization sessions, and the instructions cause the one or more processors to measure, by the controller, a charge level of the battery, determine, by the controller, whether the measured charge level is sufficient for only a predetermined number N of aerosolization sessions by the heater, and use the indicator in a first manner to indicate when the measured charge level is sufficient for only N aerosolization sessions by the heater.

[0038] Preferably, the fourth aspect includes the preferred features of the first aspect.

[0039] Embodiments of the invention will now be described, by way of example only, with reference to the drawings in which: [Brief description of the drawings]

[0040] [Figure 1A] 1 is a schematic diagram of an aerosol generating device having a closable opening in a closed position and an open position, respectively. [Figure 1B] 1 is a schematic diagram of an aerosol generating device having a closable opening in a closed position and an open position, respectively. [Diagram 2] FIG. 1 is a block diagram of the components of an aerosol generating device. [Diagram 3] 1 is a flow diagram of a method of operating an aerosol generating device. [Figure 4] 4 is another flow diagram of a method of operating an aerosol generating device. [Diagram 5] 4 is another flow diagram of a method of operating an aerosol generating device. [Figure 6] 4 is another flow diagram of a method of operating an aerosol generating device. [Figure 7A] 1 is a schematic diagram of an aerosol generating device in a series of operating states. [Figure 7B] 1 is a schematic diagram of an aerosol generating device in a series of operating states. [Figure 7C] 1 is a schematic diagram of an aerosol generating device in a series of operating states. [Figure 7D] 1 is a schematic diagram of an aerosol generating device in a series of operating states. [Figure 7E] 1 is a schematic diagram of an aerosol generating device in a series of operating states. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0041] 1A and 1B are schematic illustrations of an aerosol generating device 100, also known as a vapor generating device or e-cigarette. The aerosol generating device 100 is arranged to receive a unit of aerosol-generating material. In the example of FIG. 1A and 1B, the unit of aerosol-generating material can be a tobacco rod. Although the following examples are directed to a unit in which the aerosol-generating material is a tobacco rod, those skilled in the art will understand that the present disclosure is also readily applicable to aerosol generating devices arranged to receive aerosol-generating material in the form of a vaporizable liquid, for example, a unit in which the aerosol-generating material is a capsule containing a vaporizable liquid. Within the context of the present disclosure, the terms vapor and aerosol can be used interchangeably.

[0042] The aerosol generating device 100 of Figures 1A and 1B includes a closable opening 114 to a cavity or heating chamber within an outer casing 110 of the aerosol generating device 100. A tobacco rod is insertable through the closable opening 114 such that a first portion of the tobacco rod is positioned within the cavity and a second portion of the tobacco rod extends outwardly from the cavity. A heater 108 is positioned within the cavity to engage the first portion of the tobacco rod. The heater 108 is positioned to heat, without burning, the tobacco rod to generate an aerosol. The second portion of the tobacco rod forms a mouthpiece through which a user of the device can inhale the generated aerosol.

[0043] The closable opening 114 is opened and closed by a movable lid 112. In the example of Figures 1A and 1B, the movable lid 112 is slidable between a closed position (Figure 1A) and an open position (Figure 1B). In other examples, the movable lid 112 can be any other type of movable lid 112, such as a hinged lid.

[0044] A controller 102 (described in more detail below) of the aerosol generation device 100 can determine that the closeable opening 114 has moved from a closed position (FIG. 1A) to an open position (FIG. 1B) as the slidable lid 112 moves between the two positions. The controller 102 can similarly determine that the closeable opening 114 has moved from an open position to a closed position. One or more sensors can be disposed on the casing 110 of the aerosol generation device 100. As the slidable lid 112 moves to the open position, the controller 102 can use the sensors to detect the change in position of the lid 112, and thus the movement.

[0045] One or more indicators 104, such as light emitting indicators (e.g., one or more light emitting diodes, LEDs), are disposed on the outer casing 110 of the aerosol generating device 100. The indicator 104 may be an LED bar including multiple LEDs. In other examples, the one or more indicators may be audio indicators capable of emitting an audio signal, or tactile indicators capable of providing a vibration signal to a user, or a combination of the aforementioned indicators.

[0046] FIG. 2 shows a block diagram of further components of the aerosol generating device 100 described with reference to FIGS. 1A and 1B.

[0047] As discussed above, the aerosol generating device 100 includes a heater 108 disposed within the cavity to aerosolize the tobacco rod or aerosol-generating material. In some examples, the heater 108 provides heat to the tobacco rod by thermal conduction. In other examples, the heater 108 may be positioned to provide power by induction to a heating element disposed within the tobacco rod.

[0048] The aerosol generating device 100 includes a battery 106. The battery 106 is used to power the aerosol generating device 100, including the heater 108 and the indicator 104.

[0049] The indicator 104 is used to provide operating status information to a user of the aerosol generating device 100. For example, the indicator 104 can display information regarding the state of charge of the battery 106, as described below. The indicator 104 can also display information regarding the use status of the device, for example whether the device is switched on, off, etc.

[0050] The operation of the aerosol generating device 100 is controlled by a controller 102. In some examples, the controller 102 is a microprocessor unit. The controller 102 includes a memory and a processor, the processor being arranged to execute instructions stored in the memory and provide operational control over the aerosol generating device 100, including controlling the flow of power from the battery 106 to the heater 108.

[0051] In operation, a user of the aerosol generating device 100 moves the slidable lid 112 from a closed position (FIG. 1A) to an open position (FIG. 1B) and inserts a tobacco rod into the cavity or heating chamber through the closable opening 114. The heater 108 is then activated. In some examples, the heater 108 is activated by the controller 102 detecting that a user has provided an input, such as by pressing a heating button built into the device. In other examples, the heater 108 can be activated by the controller 102 detecting the presence of a tobacco rod in the heating chamber, by detecting that the lid 112 has moved from the closed position to the open position or a third position that activates heating, or by detecting airflow when a user draws on the tobacco rod.

[0052] When the heater 108 is activated, power is directed to the heater 108 from the battery 106 by the controller 102. The battery 106 is capable of storing a sufficient charge to completely aerosolize one or more tobacco rods. The complete aerosolization of one tobacco rod may be considered one aerosolization session.

[0053] The heater 108 heats the tobacco rod while forming an aerosol. A user of the device can then draw on the end of the tobacco rod protruding from the device to inhale the generated aerosol.

[0054] After aerosolization of the tobacco rod, the user can remove the finished tobacco rod from the device and close the closable opening 114 by moving the lid 112 to the closed position (FIG. 1A). In some examples, the controller 102 can determine to switch off the heater 108 by stopping the power flow from the battery 106 to the heater 108. When the controller 102 detects that the user is no longer pressing the heat button, it can determine to switch off the heater 108 accordingly. In other examples, the controller 102 can determine to switch off the heater 108 when it detects that the movable lid 112 has moved from the open position to the closed position.

[0055] During operation of the aerosol generating device 100, the controller 102 is configured to determine the charge level of the battery 106 and to send an alert to a user of the aerosol generating device 100 when the remaining charge level of the battery 106 is sufficient for only a predetermined number of aerosolization sessions. For example, the controller 102 can determine when the remaining battery charge level is sufficient for only one more aerosolization session. In this way, the user can be alerted to the fact that after aerosolizing the next tobacco rod, the battery 106 will need to be charged for a subsequent aerosolization session. This avoids the risk that a user who wants to perform an aerosolization session with a subsequent tobacco rod is unable to do so because there is not enough power remaining in the device.

[0056] This process is explained in more detail with reference to the flow chart provided in FIG.

[0057] In step S301, the controller 102 measures the charge level of the battery 106.

[0058] In step S302, the controller 102 determines whether the measured charge level is sufficient for only a predetermined number N of aerosolization sessions by the heater 108.

[0059] In step S303, the controller 102 indicates when the measured charge level is sufficient for only N aerosolization sessions by the heater 108 using the indicator 104 in a first manner.

[0060] More specifically, in step S301, to measure the charge level of the battery 106, the controller 102 measures an electrical parameter of the battery indicative of the charge level. In one example, when measuring the charge level of the battery 106, the controller 102 is configured to measure the voltage of the battery 106. The measured battery voltage is then compared to a predetermined battery voltage corresponding to a predetermined battery charge level.

[0061] As the state of charge (i.e., charge level) of the battery 106 decreases, for example due to an ongoing aerosolization session, the voltage measured across the battery 106 also decreases. Thus, a relationship may be established between the charge level as a percentage of the maximum charge level and the battery voltage. In other examples, other methods for determining the state of charge of the battery 106 may be used instead of voltage measurements.

[0062] Table 1 shows an exemplary look-up table for a battery 106 configured to power a heater 108 for 20 aerosolization sessions (i.e., a battery configured to power a heater 108 to aerosolize 20 tobacco rods). The table illustrates an exemplary relationship between measured battery voltage, corresponding battery charge level, and the corresponding number of remaining aerosolization sessions that can be powered at that battery charge level.

[0063] [Table 1]

[0064] In the example of a battery 106 having the capacity to aerosolize 20 tobacco rods, a look-up table can be constructed by measuring the battery voltage before and after aerosolizing a tobacco rod until all 20 tobacco rods have been aerosolized. This can be repeated for multiple batteries, and the average battery voltage can be determined for each remaining number of tobacco rod aerosolization sessions.

[0065] More specifically, in step S302, in an example in which the controller 102 is configured to determine and indicate when the charge of the battery 106 is sufficient for only one more aerosolization session (N=1), the controller 102 compares the measured battery voltage to a first predetermined battery voltage and a second predetermined battery voltage that define the two ends of a battery voltage range. The first predetermined battery voltage is the battery voltage corresponding to two aerosolization sessions remaining (3470 mV), and the second predetermined battery voltage is the battery voltage corresponding to one aerosolization session remaining (3420 mV).

[0066] When the measured battery voltage is less than the minimum battery voltage for two remaining aerosolization sessions (3470 mV in the example of Table 1) but is greater than or equal to the minimum charge level for one aerosolization session (3420 mV in the example of Table 1), the controller 102 determines that the remaining charge level is sufficient for only one aerosolization session. That is, if the controller 102 determines that the measured battery voltage satisfies 3420 mV≦[measured battery voltage]<3470 mV, the controller 102 determines that the measured charge level (as the measured battery voltage) is sufficient for only one aerosolization session by the heater 108. In response to determining that the measured charge level is sufficient for only one aerosolization session (S302), the controller 102 uses the indicator 104 in a first manner to indicate that the measured charge level is sufficient for only one more aerosolization session (S303).

[0067] More generally, in step S302, the controller 102 can determine whether the measured charge level (e.g., determined by measuring the battery voltage as described above) is sufficient for only N additional aerosolization sessions, where N is an integer number of remaining aerosolization sessions that the battery 106 can power. The controller 102 compares the measured charge level to a first predetermined charge level and a second predetermined charge level, where the first predetermined charge level corresponds to a battery 106 whose charge level is insufficient for N+1 aerosolization sessions and the second predetermined charge level corresponds to a battery 106 whose charge level is sufficient for N aerosolization sessions. In other words, the first predetermined charge level corresponds to a battery 106 having a minimum charge level required for N+1 aerosolization sessions and the second predetermined charge level corresponds to a battery 106 having a minimum charge level required for N aerosolization sessions. The controller 102 then determines that the measured charge level is sufficient for only N aerosolization sessions when the measured charge level is less than the first predetermined charge level and greater than or equal to the second predetermined charge level.

[0068] That is, the controller 102 can determine whether the measured charge level is sufficient for only N aerosolization sessions by the heater 108 when the measured charge level satisfies the following equation: [second predetermined charge level for N aerosolization sessions]≦[measured charge level of the battery]<[first predetermined charge level for N+1 aerosolization sessions].

[0069] In this manner, the controller 102 can determine when only enough power remains in the battery 106 to fully aerosolize N aerosol-generating material units / consumables (e.g., N tobacco rods). In one example, the predetermined charge level is stored in a memory accessible to the controller 102.

[0070] In some examples, the controller 102 of the aerosol generating device 100 can be pre-programmed to determine and indicate when the measured charge level is sufficient for only a certain number of aerosolization sessions remaining (e.g., one aerosolization session remaining). That is, the device can be pre-configured to determine and indicate to the user when sufficient charge is available for only a certain number of aerosolization sessions (e.g., one). In this case, the first pre-defined charge level and the second pre-defined charge level can be specially stored in the memory.

[0071] In some examples, such as those detailed above, the predetermined number N of aerosolization sessions may be one (N=1), representing a battery with enough power remaining for only one aerosolization session. In another example, N=2, representing a battery with enough power remaining for only two aerosolization sessions. In another example, N may be equal to the total number of units of aerosol-generating material (or tobacco rods) in the packet, e.g., N=20. However, one of ordinary skill in the art will readily appreciate that N may be any other suitable positive integer number.

[0072] In another example, a user of the aerosol generating device 100 can define a predetermined number N of aerosolization sessions to be determined and displayed. For example, the user may want to be displayed when there is enough charge remaining for only two aerosolization sessions. In such an example, the user can input the predetermined number N of aerosolization sessions through an interface with the device (e.g., an interface built into the aerosol generating device 100, or a wired interface such as a USB connection, or a wireless interface such as a Bluetooth connection between the aerosol generating device 100 and an external device such as a smartphone). The controller 102 can then determine a first predetermined charge level for N+1 sessions and a second predetermined charge level for N sessions from a lookup table (such as Table 1) stored in a memory accessible to the controller 102.

[0073] For illustrative purposes, Table 2 shows an alternative exemplary look-up table for a battery 106 configured to power the heater 108 for ten aerosolization sessions (i.e., a battery configured to power the heater 108 to aerosolize ten tobacco rods).

[0074] [Table 2]

[0075] More specifically, in step S303, using the indicator 104 to display in a first manner may include illuminating one or more light sources, such as light emitting diodes (LEDs), at a first flash frequency or in a first pattern. Alternatively or additionally, using the indicator to display in a first manner may include illuminating one or more light sources in a first color. In another example, using the indicator to display in a first manner may include emitting a first audio signal using an audio generator, such as a speaker. In a further example, using the indicator to display in a first manner may include vibrating the device in a first haptic feedback pattern using a vibration module. Using the indicator 104 to display in a first manner may include any combination of the aforementioned displays with any combination of the aforementioned indicators.

[0076] The controller 102 can be configured to automatically display using the indicator 104 in a first manner in response to a determination that the measured charge level is sufficient for only a predetermined number N of aerosolization sessions.

[0077] In some examples, after step S303 or in combination with step S303 having occurred / occurring, the controller may, in response, automatically switch on the heater and begin the aerosolization session upon detecting a heater trigger, such as a heating button being pressed.

[0078] The process described with reference to Figure 3 may be performed by the controller 102 before an aerosolization session begins. That is, once the controller 102 determines that an aerosolization session is being initiated, the controller 102 first measures the charge level of the battery 106, as described with respect to S301. The controller 102 then determines whether the measured charge level is sufficient for a predetermined number N of aerosolization sessions (S302), and if so, indicates this using an indicator (S303) before directing power from the battery 106 to the heater 108 to enable the heater 108 to aerosolize the tobacco rod.

[0079] In a particular example, upon detecting that the closable opening 114 has moved from a closed position (FIG. 1A) to an open position (FIG. 1B), for example by detecting that the slidable lid 112 has moved between the two positions, the controller 102 can perform the process described with reference to FIG. 3. This can be an indication of the beginning of an aerosolization session. Alternatively, upon detecting that a heating button has been pressed by a user of the aerosol generating device 100, the controller 102 can perform the process described with reference to FIG. 3.

[0080] Upon determining that the closable opening is moving to the open position, e.g., when the controller determines that the movable lid has moved to the open position, the controller can initiate a standby mode during which the battery charge level is measured. The controller can switch on the heater and terminate the standby mode in response to determining that the battery charge level is sufficient for at least one complete aerosolization session. The controller can automatically switch on the heater in response to determining that the battery charge level is sufficient for at least one complete aerosolization session. Alternatively, the controller can switch on the heater upon detecting that a heater trigger, such as a heating button, has been pressed in combination with determining that the battery charge level is sufficient for at least one complete aerosolization session.

[0081] Measuring the charge level and determining and indicating before each aerosolization session when the measured charge level is sufficient for only a predetermined number N of aerosolization sessions is advantageous because it allows the user to be aware before the aerosolization session that the battery charge only lasts for N sessions. This is particularly advantageous when the predetermined number N is 1, because the user is informed before the aerosolization session that this is the last aerosolization session for which the charge of the battery 106 will be sufficient.

[0082] In another example, the process described with reference to Figure 3 may occur after the controller 102 determines that the aerosolization session is complete. More specifically, upon detecting that the closable opening 114 has moved from the open position (Figure 1B) to the closed position (Figure 1A), the controller 102 may perform the process described with reference to Figure 3. This may be an indication that the aerosolization session is complete. Alternatively, upon detecting that the heating button has been released by the user of the aerosol generating device 100, the controller 102 may perform the process described with reference to Figure 3.

[0083] Measuring the charge level and determining and indicating after each aerosolization session when the measured charge level is sufficient for only a predetermined number N of aerosolization sessions is advantageous because after an aerosolization session is terminated, the user will be alerted if the battery charge level is sufficient for only N more sessions. This is particularly advantageous when the predetermined number N is 1, as the user will be informed that the next aerosolization session is the last aerosolization session for which the charge of the battery 106 is sufficient.

[0084] 3 may occur after the controller 102 switches off the heater 108. In particular, the controller 102 may be configured to switch off the heater 108 prior to determining the charge level of the battery 106 in response to determining that the closable opening 114 has moved to the closed position.

[0085] Measuring the charge level after switching off the heater 108 allows a more accurate measurement of the charge level of the battery 106 since there is no heating load applied.

[0086] The above examples of when the process described with reference to Figure 3 occurs for an aerosolization session can be used in combination with each other. For example, the charge level of the battery 106 can be measured (S301) and determined (S302) and indicated (S303) both before and after the aerosolization session.

[0087] FIG. 4 shows a flow diagram of further steps performed by the controller 102 following the measurement of the battery charge level in step S301.

[0088] In step S402, following measuring the charge level of the battery 106 in step S301, the controller 102 determines whether the measured charge level is sufficient for at least one complete aerosolization by the heater 108.

[0089] In step S403, the controller 102 switches on the heater 108. Step S403 may occur automatically in response to determining that the charge level of the battery 106 is sufficient for at least one complete aerosolization session by the heater 108. Alternatively, step S403 may occur in response to detecting an activation command when the charge level of the battery 106 is sufficient for at least one complete aerosolization session by the heater 108. In some examples, the activation command may include the controller 102 detecting a heating button being pressed by a user, detecting the lid 112 moving from a closed position to an open position or to a third position that initiates heating, or detecting the presence of a tobacco rod in the heating chamber by detecting airflow when a user draws on the tobacco rod.

[0090] In this manner, the heater 108 is switched on only when there is sufficient power for a complete aerosolization session, thereby preventing the aerosol generating device 100 from only partially aerosolizing the tobacco rod because the battery 106 runs out of charge before the aerosolization session is completed.

[0091] FIG. 5 shows a flow diagram of further steps performed by the controller 102 following the measurement of the battery charge level in step S301.

[0092] In step S502, following measuring the charge level of the battery 106 in step S301, the controller 102 determines whether the measured charge level of the battery 106 is lower than the level required for one complete aerosolization session by the heater 108.

[0093] In step S503, in response to determining that the charge level of the battery 106 is lower than the level required for one complete aerosolization session, the controller 102 uses the indicator 104 in a second manner to indicate that the measured charge level is insufficient for an aerosolization session by the heater 108.

[0094] Displaying using the indicator 104 in a second manner can include illuminating one or more light sources, such as LEDs, at a second flash frequency or in a second pattern. The second flash frequency or second pattern can be different from the first flash frequency or first pattern associated with the first manner of using the indicator 104. Alternatively or additionally, displaying using the second manner can include illuminating one or more light sources in a second color that is different from the first color associated with the first manner. In another example, displaying using the indicator in a second manner can include emitting a second audio signal using an audio generator, such as a speaker, that is different from the first audio signal associated with the first manner. In a further example, displaying using the indicator in a second manner can include vibrating the device using a vibration module in a second haptic feedback pattern that is different from the first haptic feedback pattern associated with the first manner. Displaying using the indicator 104 in the second manner can include any combination of the above-mentioned displays on any combination of the above-mentioned indicators.

[0095] In this manner, the user is notified when there is insufficient power for a complete aerosolization session, thereby preventing the user from being midway through an aerosolization session only to have the tobacco rod only partially aerosolized because the battery 106 runs out of charge before the aerosolization session is complete, thereby avoiding the potential waste of the tobacco rod due to it only being partially aerosolized.

[0096] An indication in the second manner may occur after the heater is switched off, e.g., when the moveable lid is closed and the controller determines to switch off the heater, or when the moveable lid is moved to an open position and the device enters a standby mode, e.g., an indication in the second manner may occur.

[0097] After the heater is switched off following the last aerosolization session with remaining battery power, the aerosolization mode cannot be reactivated. For example, the heater is fixed in the off mode, regardless of whether the movable lid or the heater button is acted upon. The device can only be reactivated after the battery is charged to a level at least equal to a minimum threshold that is equal to or greater than the level that triggers an indication that there is enough battery remaining for only one aerosolization session. The aerosol generating device may still operate in standby mode for a battery charge check (e.g., as a low-level check).

[0098] In some examples, in response to performing one aerosolization session after determining that the measured charge level is sufficient for only one complete aerosolization session by the heater 108, the controller 102 is configured to determine that the measured charge level is lower than the level required for one complete aerosolization session by the heater 108. That is, if the controller 102 determines that the measured charge level after this next aerosolization session is performed is sufficient for only one complete aerosolization session, the controller 102 may determine that the current charge level is lower than the level required for further aerosolization sessions, which the controller 102 may then automatically indicate using the indicator 104 in a second manner (S503).

[0099] FIG. 6 shows a flow diagram of further steps performed by the controller 102 following the measurement of the battery charge level in step S301.

[0100] In step S602, following measuring the charge level of the battery 106 in step S301, the controller 102 is configured to determine the available number of aerosolization sessions that can be sufficiently powered by the battery 106 based on the measured charge level.

[0101] In step S603, the controller 102 uses the indicator 104 in a third manner to display an indication of the available number of aerosolization sessions that can be fully powered by the battery 106. The controller 102 can switch on the heater after displaying in the third manner or in combination with this indication.

[0102] Steps S602 and S603 may occur before steps S302 and S303, for example, when the number of aerosolization sessions available to the battery is greater than or equal to N.

[0103] More specifically, in step S602, the controller 102 can determine the available number of aerosolization sessions that can be sufficiently powered by comparing the measured charge level of the battery 106 (e.g., by measuring the battery voltage as described above) to a look-up table that contains the battery charge level and the corresponding number of remaining aerosolization sessions that can be powered at that battery charge level, such as the example tables presented as Tables 1 and 2. The look-up table can be stored in a memory accessible to the controller 102.

[0104] In some examples, the indication of the available number of aerosolization sessions that can be fully powered by the battery 106 can be presented on the screen of the display device as a number of remaining tobacco rods that can be aerosolized. In other examples, the indication of the available number of aerosolization sessions that can be fully powered by the battery 106 can be presented as a percentage of the total battery capacity.

[0105] In another example, the indicator 104 can include multiple light sources, such as LEDs, which can form an LED bar 104. Indicating in a third manner can include illuminating multiple LEDs, such as an LED bar, in proportion to the battery charge level and / or the available number of aerosolization sessions that can be fully powered by the battery 106.

[0106] In a particular implementation, the controller 102 measures the charge level of the battery 106 by measuring the battery voltage in step S301. This is translated into a battery charge level using a look-up table. If the indicator includes eight LEDs, then the number of LEDs to illuminate in step S603 (NUM_LEDS_ILLUMINATED) can be calculated from the measured charge level of the battery (BATTERY_CHARGE) as follows: NUM_LEDS_ILLUMINATED=(BATTERY_CHARGE*8) / 100

[0107] For example, if the charge level of the battery 106 is calculated to be 50%, five LEDs will be turned on.

[0108] More generally, the number of lit LEDs out of the total number of LEDs (NUM_LEDS_TOTAL) can be expressed as NUM_LEDS_ILLUMINATED=(BATTERY_CHARGE*NUM_LEDS_TOTAL) / 100).

[0109] If NUM_LEDS_ILLUMINATED is a non-integer number, it can be rounded to the nearest integer.

[0110] Thus, as the battery charge level decreases, fewer LEDs are illuminated to communicate this information to the user of the device. This is visually presented in Figures 7A-7E. Figure 7A corresponds to a fully charged battery 106, with the LED bars fully illuminated. Figure 7B corresponds to a battery 106 with a charge level of 75%. Figure 7C corresponds to a battery 106 with a charge level of 50%. Figure 7D corresponds to a battery 106 with a charge level of 25%.

[0111] When NUM_LEDS_ILLUMINATED falls below one, one LED may be illuminated as described below. In FIG. 7E, the LEDs in the LED bar (rather than illuminating no LEDs at all) flash at a certain frequency to indicate that there is only enough battery charge remaining for one more aerosolization session, i.e., the LED bar indicates in a first manner. When the charge level drops below this point, the LEDs begin to flash at a different frequency, e.g., more frequently, to indicate that there is not enough battery power remaining for any more aerosolization sessions, i.e., the LED bar indicates in a second manner.

[0112] In other examples, a display integrated into the device can provide a percentage charge level or a discrete number of aerosolization sessions that can be powered by the remaining battery charge level.

[0113] The LED bar 104 can further be used to indicate the heating stage for an aerosolization session. For example, when the heater 108 of the aerosol generating device 100 is heated to an operating (or target aerosolization) temperature, the controller 102 can sequentially light the LEDs of the LED bar 104 in proportion to the progress of the heating based on the heater temperature determined by the controller in comparison with the operating temperature. As the lighting progresses, the lighted LEDs can flash during the heating stage. It is also possible to provide a first haptic feedback (such as one vibration) by the vibration module to indicate that the heating process has started. A second haptic feedback (such as two short vibrations) can be provided to indicate that the heating is completed. When the device is ready for an aerosolization session, an indication haptic feedback (such as two short vibrations) can be provided with the LED bar fully lighted.

[0114] The LED bar 104 can also be used to indicate the progress of the aerosolization session by sequentially turning off the LEDs of the LED bar 104 as the session progresses. The controller 102 determines the progress of the session based on, for example, the elapsed time of a given aerosolization session period. A vibration module can be used to provide a single haptic feedback vibration near the end of the session, for example, when there are 20 seconds remaining. At the same time, the LED bar 104 can blink or flash near the end of the session. When the session is over, another haptic feedback vibration can be provided to indicate this to the user of the aerosol generating device 100.

[0115] In the aforementioned example, one haptic feedback vibration can be, for example, 1 second long, and two short haptic feedback vibrations can be, for example, a 0.5 second vibration followed by a 0.3 second pause followed by another 0.5 second vibration. The haptic feedback vibrations can be provided by a vibration module triggered by the controller 102.

[0116] One skilled in the art will appreciate that the indicator 104 used in the first, second and third methods may be the same indicator or may be different indicators. In some examples where there are multiple indicators, the first, second and third methods may use some of the multiple indicators. For example, when the indicator is multiple LEDs, one LED may flash at a different frequency or in a different pattern for the first and second methods, and multiple LEDs may be illuminated to indicate the charge level in the third method.

[0117] Those skilled in the art will appreciate that the processes described with reference to Figures 3, 4, 5 and / or 6 may be combined to form a single overall process based on measuring the charge level of the battery 106 and performing subsequent further actions.

[0118] The process steps described herein performed by the controller 102 may be stored on a non-transitory computer readable medium, or storage device, associated with the controller 102. Computer readable media may include non-volatile media and volatile media. Volatile media may include semiconductor memory and dynamic memory, among others. Non-volatile media may include optical disks and magnetic disks, among others.

[0119] It will be readily understood by those skilled in the art that the preceding embodiments in the above description are not limiting, and the features of each embodiment may be incorporated into other embodiments as appropriate.

Claims

1. 1. An aerosol generating device comprising: a display; and a controller connectable to a battery and a heater, the heater being configurable to aerosolize units of aerosol-generating material in an aerosolization session, the battery being configurable to provide power to the heater for one or more aerosolization sessions, and the controller being configured to: configured to measure a charge level of the battery; configured to determine whether the measured charge level is sufficient for only a predetermined number N of aerosolization sessions by the heater; and configured to use the indicator in a first manner to indicate when the measured charge level is sufficient for only N aerosolization sessions by the heater; When determining whether the measured charge level is sufficient for only N aerosolization sessions by the heater, the controller further: configured to compare the measured charge level with a first predetermined charge level and a second predetermined charge level, the first predetermined charge level corresponding to the battery having a charge level insufficient for N+1 aerosolization sessions, and the second predetermined charge level corresponding to the battery having a charge level sufficient for N aerosolization sessions; and An aerosol generating device configured to determine that the measured charge level is sufficient for only N aerosolization sessions when the measured charge level is less than the first predetermined charge level and greater than or equal to the second predetermined charge level.

2. The controller: configured to measure the charge level of the battery before each aerosolization session; and / or configured to measure the charge level of the battery after each aerosolization session; and / or 2. The aerosol generating device of claim 1, configured to measure the charge level of the battery when the heater is switched off.

3. The aerosol generating device further includes a closable opening through which the aerosol-generating material is received, and the controller further includes: configured to measure the charge level of the battery upon determining that the closable opening has been moved to a closed position; and / or 3. The aerosol generating device of claim 1 or 2, configured to measure the charge level of the battery upon determining that the closable opening has been moved to an open position.

4. 4. The aerosol generating device of claim 3, wherein the controller is further configured to switch off the heater before determining the charge level of the battery when the controller determines that the closable opening has moved to the closed position.

5. Upon determining that the closable opening has moved to the open position, the controller further: configured to initiate a standby mode during which the charge level of the battery is measured; and 5. The aerosol generating device of claim 3 or claim 4, configured to switch on the heater and exit the standby mode in response to a determination that the charge level of the battery is sufficient for at least one complete aerosolization session by the heater.

6. The controller further comprises: configured to determine whether the measured charge level is sufficient for at least one complete aerosolization session by the heater; and configured to automatically switch on the heater in response to determining that the charge level of the battery is sufficient for at least one complete aerosolization session by the heater; or An aerosol generating device as described in any one of claims 1 to 5, configured to switch on the heater in response to detection of an activation command when the charge level of the battery is sufficient for at least one complete aerosolization session by the heater.

7. 7. An aerosol generating device according to claim 1, wherein the indicator comprises at least one light emitting source included in the aerosol generating device.

8. The controller further comprises: configured to determine whether the measured charge level of the battery is lower than a level required for one complete aerosolization session by the heater; and An aerosol generating device as described in any one of claims 1 to 7, configured to use the indicator in a second manner to indicate that the measured charge level is insufficient for an aerosolization session using the heater in response to a determination that the charge level of the battery is lower than the level required for one complete aerosolization session.

9. The controller further comprises: An aerosol generating device as described in any one of claims 1 to 8, configured to determine that the measured charge level is lower than the level required for one complete aerosolization session by the heater in response to performing one aerosolization session after determining that the measured charge level is sufficient for only one complete aerosolization session by the heater.

10. When measuring the charge level, the controller: configured to measure the voltage of the battery; and configured to compare the measured battery voltage to a predetermined battery voltage having a corresponding predetermined battery charge level; and An aerosol generating device as described in any one of claims 1 to 9, configured to determine the measured battery charge level based on the comparison between the measured battery voltage and the predetermined battery voltage and corresponding predetermined battery charge level.

11. The controller further comprises: configured to determine an available number of aerosolization sessions that can be sufficiently powered by the battery based on the measured charge level; and An aerosol generating device as described in any one of claims 1 to 10, configured to use the indicator in a third manner to display an indication of the available number of aerosolization sessions that can be sufficiently powered by the battery.

12. An aerosol generating device system comprising the aerosol generating device according to any one of claims 1 to 11, and further comprising the battery and the heater.

13. 1. A method of operating an aerosol generating device including a display and a controller connectable to a battery and a heater, the heater being configurable to aerosolize units of aerosol-generating material in an aerosolization session, the battery being configurable to provide power to the heater for one or more aerosolization sessions, measuring, by the controller, a charge level of the battery; determining, by the controller, whether the measured charge level is sufficient for only a predetermined number N of aerosolization sessions by the heater; and using the indicator in a first manner to indicate when the measured charge level is sufficient for only N aerosolization sessions with the heater; When the method determines, by the controller, whether the measured charge level is sufficient for only N aerosolization sessions by the heater, the method further comprises: comparing the measured charge level to a first predetermined charge level and a second predetermined charge level, the first predetermined charge level corresponding to the battery having a charge level insufficient for N+1 aerosolization sessions and the second predetermined charge level corresponding to the battery having a charge level sufficient for N aerosolization sessions; and determining that the measured charge level is sufficient for only N aerosolization sessions when the measured charge level is less than the first predetermined charge level and is greater than or equal to the second predetermined charge level; The method includes:

14. 16. A non-transitory computer-readable medium storing instructions that, when executed by one or more processors, cause the one or more processors to control an aerosol generating device, the aerosol generating device including a display and a controller connectable to a battery and a heater, the heater configurable to aerosolize units of aerosol-generating material in an aerosolization session, the battery configurable to provide power to the heater for one or more aerosolization sessions, and the instructions causing the one or more processors to: causing the controller to measure a charge level of the battery; causing the controller to determine whether the measured charge level is sufficient for only a predetermined number N of aerosolization sessions by the heater; and using the indicator in a first manner to indicate when the measured charge level is sufficient for only N aerosolization sessions with the heater; When the instructions cause the one or more processors to determine, by the controller, whether the measured charge level is sufficient for only N aerosolization sessions by the heater, further comprising: comparing the measured charge level to a first predetermined charge level and a second predetermined charge level, the first predetermined charge level corresponding to the battery having a charge level insufficient for N+1 aerosolization sessions and the second predetermined charge level corresponding to the battery having a charge level sufficient for N aerosolization sessions; A non-transitory computer-readable medium for determining that the measured charge level is sufficient for only N aerosolization sessions when the measured charge level is less than the first predetermined charge level and greater than or equal to the second predetermined charge level.

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