Aerosol generating device and method

Abstract

An aerosol-generating device, the aerosol-generating device comprising: a modular energy system (100) comprising two or more removable energy units (200-1 to 200-4), in which the energy units (200-1 to 200-4) are connected to each other, each of the two or more removable energy units (200-1 to 200-4) is configured to be controlled to discharge according to a selected power transfer mode of a plurality of power transfer modes.

Description

Technical Field

[0001] This disclosure relates to a modular energy system for an aerosol generating apparatus. This disclosure also relates to a method for discharging two or more removable energy units in a modular energy system for an aerosol generating apparatus. This disclosure further relates to an aerosol generating apparatus. Background Technology

[0002] As the demand for aerosol generating devices increases, so does the need for improved energy systems. Furthermore, there is an increasing demand from users to operate these energy systems and to potentially replace them.

[0003] Current energy systems used for aerosol generation systems typically have as large a capacity as possible to minimize the frequency of charging cycles required by the user and to avoid requiring the user to switch between energy units. Power management strategies are either infrequent or overly simplistic and designed to be applicable only to a single energy unit.

[0004] One problem with traditional energy systems is that each energy cell undergoes a short charging cycle; for example, a quick charge before the user leaves the house. Often, when the battery system's maximum capacity exceeds the capacity needed for the next use, the waiting time for a full charge is inconvenient for the user. Therefore, different energy cells are typically kept in different states of charge.

[0005] A related challenge is providing an energy system and apparatus that meets growing safety requirements while providing convenient discharge for the user. The object of this invention is to overcome or avoid at least some of the problems mentioned above or to provide an alternative method. Summary of the Invention

[0006] According to this disclosure, an aerosol generating apparatus is provided, which includes a modular energy system; and a method for discharging two or more removable energy units in the modular energy system of the aerosol generating apparatus is provided.

[0007] According to one aspect, an aerosol generating apparatus is provided, comprising a modular energy system including two or more removable energy units. Each of the two or more removable energy units is configured to be controlled to discharge according to a selected power transmission mode among a plurality of power transmission modes.

[0008] Therefore, based on user habits, users can choose the type of removable energy unit configuration they desire for specific situations. For example, if a user doesn't need the power of an energy unit with 20+ rods, they can choose a smaller energy unit, resulting in a smaller overall system. This allows for smaller energy units in some cases, which may be more convenient for the user. Additional energy units can be stored externally and inserted when needed.

[0009] In other words, by providing removable energy units, energy units with little or no power can be removed from the system to reduce the system's weight and size. Furthermore, users can select the size or capacity of the energy unit to match the desired power level (i.e., the number of cycles the energy unit will allow).

[0010] Selectable power delivery modes allow the energy system to discharge according to the required output. For example, users can select the power delivery mode for ease of use, system lifespan, or optimal safety.

[0011] Modular energy systems allow users to easily reduce the overall size of the device and use it more responsibly to extend battery life and potentially reduce spending on new batteries.

[0012] More generally, intentionally discharging certain available energy cells results in improved convenience, longer battery life, and enhanced safety.

[0013] Each of two or more removable energy units may include a system controller configured to control the discharge of the respective removable energy unit.

[0014] The advantage of each energy unit including a controller is that each energy unit can be used as an independent unit. Furthermore, the energy units can be used as power banks to charge other devices or directly for use with other devices.

[0015] The aerosol generating device may further include a device controller configured to control the discharge of two or more removable energy units.

[0016] Advantageously, two or more removable energy units can be centrally controlled by an aerosol generating device.

[0017] The device controller can be configured to receive power status information from each of two or more removable energy units. Advantageously, each energy unit can indicate its power status to the user.

[0018] The aerosol generating device may include a heating unit, and each of two or more removable energy units may be configured to provide energy to the heating unit.

[0019] Advantageously, any one of the removable energy units can directly supply energy to the heating unit. Therefore, there is no need to provide a fixed energy unit that cannot be removed from the aerosol generating device.

[0020] The aerosol generating device may further include a heater energy unit, wherein the heater energy unit is integrated with the heating unit. Advantageously, one of two or more removable energy units can be configured to charge the heater energy unit, so that the heater energy unit can be recharged without being removed from the device.

[0021] The energy system may include one or more indicators configured to indicate the electrical status of two or more removable energy units.

[0022] Advantageously, the power level of the energy units can be notified to the user. Therefore, based on the power level of certain energy units, the user can choose not to attach them. Additionally, the user can determine the power level of the energy units without inserting them into the aerosol generating device.

[0023] Multiple power transmission modes may include a first power transmission mode in which removable energy units discharge based on the order in which they are last installed in the system.

[0024] Advantageously, the energy units can be discharged in the order most convenient for the user. That is, the power management strategy will ensure that the first energy unit from the bottom of the system (e.g., the energy unit most easily removed when the system is attached to a device) is fully discharged, so that the user can remove the energy unit when it is depleted. The user can then recharge the energy unit or store it elsewhere to achieve a smaller system and device configuration.

[0025] Multiple power transmission modes may include a second power transmission mode in which removable energy units are selected to discharge sequentially based on a calculated capacity decay factor for each of two or more removable energy units.

[0026] Advantageously, this power transmission mode is optimized for energy cell lifetime. That is, energy cells with a relatively high state of charge (i.e., in the range of 60% to 100%) and no significant aging will discharge first.

[0027] Furthermore, for example, the newest energy unit can be used in the preheating phase, while different energy units can be used in the maintenance phase. Therefore, the pressure on each of the energy units is minimized.

[0028] Multiple power delivery modes may include a third power delivery mode in which removable energy units are selected to discharge sequentially based on the current state of charge of each of two or more removable energy units. The order based on the current state of charge may be descending. The third power delivery mode may include selecting the removable energy unit with the highest state of charge for discharge until the removable energy unit is no longer the one with the highest state of charge.

[0029] Advantageously, the third power transfer mode allows each of the energy cells to discharge, resulting in an equal reduction in the state of charge of each energy cell, or a reduction to a certain threshold. Therefore, this mode provides improved system safety, for example, for use before flight.

[0030] Multiple power transmission modes may include a fourth power transmission mode in which the discharge sequence of two or more energy units is based on user input.

[0031] Advantageously, the user has complete control over the discharge sequence of the energy units. Therefore, the user can, for example, choose to discharge an energy unit that is about to run out of power and use the remaining charge before leaving the house. Thus, the energy unit can then be removed before leaving, providing a miniaturized energy system that the user can carry with them.

[0032] In one example, two or more energy units are configured to be controlled by a device controller or system controller to charge each unit sequentially to a partial state of charge.

[0033] Two or more energy units can be arranged in a modular energy system for use in an aerosol generating device. The system may include two or more energy units.

[0034] By providing a modular energy system in which two or more energy units are configured to be charged sequentially to a partial state of charge, the charging speed and efficiency of the energy units are improved.

[0035] Compared to charging each energy unit simultaneously, charging each unit sequentially allows a higher state of charge (SOC) to be achieved in a given time for each individual unit. By doing so, the user can have an energy unit with a high SOC and other units that are not being charged at all during a short charging time. Therefore, the aerosol generator or the user can ignore these uncharged energy units and not install them in the modular energy system. This provides a more consistent experience for the user, as they can use only one energy unit during an inhalation cycle. Furthermore, this results in a more sustainable modular energy system, as energy units are only replaced when truly needed.

[0036] Each system controller can be configured to determine the state of charge of each of the energy units by measuring the charging current transmitted to each corresponding energy unit.

[0037] By using the charging current as a measurement characteristic, the point at which fast charging stops can be determined, and the system can switch to charging energy cells with lower state of charge.

[0038] Each system controller can be configured to stop charging each corresponding energy unit based on the measured charging current reaching a first predetermined charging current threshold.

[0039] The advantage of stopping charging an energy unit based on a predetermined charging current threshold is that if the charging of the first energy unit slows down or its efficiency decreases, the system can switch to charging another energy unit with a lower energy state.

[0040] The system controller can be configured to charge the energy units in parallel as each of the energy units is charged to a partial charge state.

[0041] Charging the energy cells in parallel while each cell is already partially charged avoids the long charging time associated with charging each cell individually. Furthermore, recharging all cells together from the start could require the user to carry all cells together to have sufficient power. In contrast, charging the energy cells in parallel while each cell is already partially charged provides a good solution between these two extremes.

[0042] During parallel charging, the system controller can be configured to periodically measure the charging current delivered to each of the respective energy units. The term "periodic" implies a time delay between each measurement. In some examples, the time delay between measurements can be the same. In other examples, there can be different time delays between measurements.

[0043] During parallel charging, the system controller can be configured to stop charging the energy unit based on the measured charging current reaching a second predetermined charging current threshold.

[0044] This feature allows the controller to determine when each of the energy units reaches the desired state of charge (such as full charge), so that power can be transferred from the energy unit to the energy unit that is still charging.

[0045] The system controller can be configured to monitor the current of each of the respective energy units; integrate each current over time to determine the health status of each of the respective energy units; and, based on the determined health status of each of the respective energy units, provide an indication of a decline in the health status of one of the energy units.

[0046] Advantageously, the health of the energy cells can be monitored based on the corresponding current measurement of each individual energy cell. Therefore, each energy cell can be continuously monitored and diagnosed during charging to recommend replacement if necessary.

[0047] According to one aspect, a method for charging two or more energy units in a modular energy system for an aerosol generating device is provided, the method comprising:

[0048] Each of the energy units is charged to a partially charged state in turn.

[0049] By providing a method in which two or more energy units are configured to be charged sequentially to a partial state of charge, the charging speed and efficiency of the energy units are improved.

[0050] Compared to charging each energy unit simultaneously, charging each unit sequentially allows for a higher state of charge (SOC) for each individual energy unit. By doing so, users can obtain energy units with a high SOC and other energy units that are not charged at all within a short charging time. Therefore, aerosol generators or users can ignore these uncharged energy units and not install them in the modular energy system.

[0051] According to another aspect, a method for discharging two or more removable energy units in a modular energy system for an aerosol generating device is provided, the method comprising: selecting one or more of the removable energy units for discharging according to a selected power transmission mode among a plurality of power transmission modes.

[0052] Therefore, based on user habits, users can choose the type of energy unit configuration they desire for a specific situation. For example, if a user does not need the power of an energy unit with 20+ rods, they can choose a smaller energy unit, thus providing a smaller overall system. In this way, smaller energy units can be provided in some cases, which may be more convenient for the user. Additional energy units can be stored externally and inserted when needed.

[0053] In other words, by providing a method with removable energy units, energy units with little or no power can be removed from the system to reduce the system's weight and size. Furthermore, users can select the size or capacity of the energy unit to match the desired power level (i.e., the number of cycles the energy unit will be allowed to operate).

[0054] Selectable power delivery modes allow the energy system to discharge according to the required output. For example, users can select the power delivery mode for ease of use, system lifespan, or optimal safety.

[0055] This approach allows users to easily miniaturize the system and use it more responsibly, extending battery life and potentially reducing spending on new batteries.

[0056] According to another aspect, an aerosol generating device is provided, comprising: a modular energy system including two or more removable energy units. Each of the two or more removable energy units is configured to be controlled to discharge according to a selected power transmission mode among a plurality of power transmission modes.

[0057] Therefore, based on user habits, users can choose the type of energy unit configuration they desire for a specific situation. For example, if a user does not need the power of an energy unit with 20+ rods, they can choose a smaller energy unit, resulting in a smaller overall device. In some cases, this smaller energy unit may be more convenient for the user. Additional energy units can be stored externally and inserted when needed.

[0058] In other words, by providing an aerosol generating device with a removable energy unit, the energy unit with little or no power can be removed from the device to reduce the weight and size of the system. Furthermore, users can select the size or capacity of the energy unit to match the desired power level (i.e., the number of cycles the energy unit will allow).

[0059] Selectable power delivery modes allow the energy unit to discharge according to the required output. For example, users can select the power delivery mode for ease of use, device lifespan, or optimal safety.

[0060] This disclosure allows users to easily miniaturize the device and use it more responsibly to extend battery life and potentially reduce spending on new batteries.

[0061] Other advantages, objects, and features of the present invention will be described below by way of example only with reference to the accompanying drawings. In the drawings, similar parts in different embodiments may be represented by the same reference numerals. Attached Figure Description

[0062] Examples of this disclosure will now be described with reference to the accompanying drawings.

[0063] Figure 1 A schematic diagram of a modular energy system is shown;

[0064] Figure 2 A schematic diagram illustrating an example of a modular energy system is shown;

[0065] Figure 3 A schematic diagram of an aerosol generating device is shown;

[0066] Figure 4 A schematic diagram of an example aerosol generating device is shown;

[0067] Figure 5 A schematic diagram of an example aerosol generating device is shown;

[0068] Figure 6 A flowchart representing the first power transmission mode is shown;

[0069] Figure 7 A flowchart illustrating the additional steps of the first power transmission mode is shown;

[0070] Figure 8 A flowchart illustrating the second power transmission mode is shown;

[0071] Figure 9 A flowchart illustrating the additional steps of the second power transmission mode is shown;

[0072] Figure 10 A flowchart illustrating the additional steps of the second power transmission mode is shown;

[0073] Figure 11 A flowchart representing the third power transmission mode is shown;

[0074] Figure 12 A flowchart illustrating a discharge method for two or more removable energy units in a modular energy system for an aerosol generation device is shown; and

[0075] Figure 13An illustration shows a charging method as described in the prior art;

[0076] Figure 14 A diagram illustrating a charging method for a modular energy system is shown; and

[0077] Figure 15 A flowchart is shown of a charging method for two or more energy units in a modular energy system for an aerosol generating device. Detailed Implementation

[0078] As used herein, the terms "aerosol precursor material," "vapor precursor material," or "vaporizable material" can refer to a puffable material that may, for example, include nicotine or tobacco and a vaporizing agent. Aerosol precursor materials are configured to release an aerosol upon heating. Tobacco can take various material forms, such as shredded tobacco, particulate tobacco, tobacco leaves, and / or reconstituted tobacco. Nicotine can be in the form of nicotine salts. Suitable aerosol precursor materials include: polyols, such as sorbitol, glycerol, and diols (such as propylene glycol or triethylene glycol); non-polyols (such as monohydric alcohols), acids (such as lactic acid), glycerol derivatives, and esters (such as triacetyl, triethylene glycol diacetate, triethyl citrate, glycerol, or vegetable glycerol). In some examples, the aerosol precursor material is essentially a liquid containing or comprising one or more solid particles (such as tobacco particles extracted from tobacco material or suspended in a solution or gel).

[0079] Aerosol generating devices are configured to aerosolize aerosol precursor materials without combustion, so as to facilitate the delivery of aerosols to users. Furthermore, and as is common in the art, the terms "vapor" and "aerosol," as well as related terms such as "vaporization," "evaporation," and "aerosolization," are generally used interchangeably.

[0080] As used herein, the term "aerosol generation device" is synonymous with "aerosol generating device" or "device" and may include an apparatus configured to heat an aerosol precursor material and deliver the aerosol to a user. The device may be portable. That is, the aerosol generating device may be configured to be handheld. "Portable" may mean that the device is used when held by a user. The device may be adapted to generate a variable amount of aerosol that can be controlled by user input.

[0081] As used herein, the term "aerosol" can include a suspension of a vaporizable material such as: solid particles; droplets; or gas. The suspension may be in a gas (including air). Aerosol as used herein can generally refer to / include vapor. Aerosols may include one or more components of a vaporizable material.

[0082] Figure 1 A schematic diagram of a modular energy system 100 is shown. The modular energy system 100 is used in an aerosol generating device 400 (such as...). Figure 4 and Figure 5 As shown in the diagram. The modular energy system 100 includes two or more removable energy units 200. For example, Figure 1 and Figure 2 The modular energy system 100 shown includes a first removable energy unit 200-1 and a second removable energy unit 200-2. Figure 3 An example of a modular energy system 100 is shown, which includes a first removable energy unit 200-1, a second removable energy unit 200-2, a third removable energy unit 200-3, and a fourth removable energy unit 200-4, but other numbers of energy units are conceivable. Figure 3 and Figure 1 and Figure 2 The only difference between the examples shown is the number of removable energy units. All descriptions of various aspects of these figures are interchangeable.

[0083] The removable energy units 200-1 to 200-4 can be battery cells, such as pouch cells. The removable energy units 200-1 to 200-4 can be connected to or attached to each other. That is, the removable energy units 200-1 to 200-4 can be connected to form a modular energy system 100.

[0084] The charging capacity of each of the removable energy units 200-1 to 200-4 can be different. For example, the charging capacity of energy unit 200-1 can be equivalent to consuming 5 "rods" (i.e., 5 aerosol generation cycles, or equivalent to consuming 5 consumables), 10 "rods", 15 "rods", 20 "rods", or 25 "rods", etc. The modular energy system 100 can include multiple energy units 200-1 to 200-4 with different charging capacities. Users can combine different energy units 200-1 to 200-4 to assemble the modular energy system 100 according to their needs. Furthermore, each of the removable energy units 200-1 to 200-4 can be charged individually or together with other removable energy units 200-1 to 200-4. That is, the capacity of the first removable energy unit 200-1 can be different from that of the second energy unit 200-2. In other examples, the charging capacity of the first removable energy unit 200-1 and the second removable energy unit 200-2 may be the same.

[0085] The connection between the removable energy units 200-1 to 200-4 can be one or more of the following: snap-fit, press-fit, magnetic connection, clamping, threaded connection, and friction fit within the housing. Other suitable connections are conceivable.

[0086] In use, the removable energy units 200-1 to 200-4 can be used as a power source to supply power to the aerosol generating device 400. For example, the removable energy units 200-1 to 200-4 can supply power to the heating unit 410 of the aerosol generating device 400 (this is in... Figure 4 and Figure 5 (As can be seen in the image). In other words, the modular energy system 100 can be used as a power source to supply power to the aerosol generating device 400. In other examples, where the aerosol generating consumable itself includes one or more electrical conductors, one or more of the removable energy units 200-1 to 200-4 can directly supply power to the aerosol generating consumable.

[0087] In some examples, one or more of two or more removable energy units 200-1 to 200-4 or a heater energy unit (not shown) may be integrated with the heating unit 410 of the aerosol generating device 400. That is, the heating unit 410 may include an integrated heating energy unit.

[0088] For example, heating unit 410 may include an integrated heating energy unit as part of a heating unit assembly. The integrated heating energy unit may be mechanically integrated. The integrated heating energy unit may be connected to heating unit 410 via magnetic connection, fixing (e.g., threaded connection, clamping), or other suitable connection methods. The electrical connection between the integrated heating energy unit and heating unit 410 may be provided mechanically or as a separate connection method. The integrated heating energy unit may be configured to be spaced a predetermined distance from heating unit 410 to avoid overheating and ensure safe operation.

[0089] The heating energy unit can be configured to be controlled as part of the modular energy system 100. That is, the heating energy unit can be used as one of two or more energy units 200-1 to 200-4. Two or more energy units 200-1 to 200-4 can be used to recharge the integrated heating energy unit. The removable energy unit that is closest to the heating unit 410 during use among the two or more removable energy units 200-1 to 200-4 can be designated as the heater energy unit.

[0090] Each of two or more removable energy units 200-1 to 200-4 can be configured to supply electrical energy to the aerosol generating device 400 with a voltage ranging from 1 V to 8 V. Preferably, each of the two or more removable energy units 200-1 to 200-4 can be configured to supply electrical energy to the aerosol generating device 400 with a voltage ranging from 3 V to 4.2 V. Most preferably, each of the two or more removable energy units 200-1 to 200-4 can be configured to supply electrical energy to the aerosol generating device 400 with a voltage of 3.7 V. Such a voltage source is particularly advantageous for modern aerosol generating devices, considering rechargeability, high energy density, and large capacity. The removable energy units 200-1 to 200-4 can be lithium-ion energy units.

[0091] Two or more removable energy units 200-1 to 200-4 are configured to be controlled to discharge according to a selected power transmission mode among a variety of power transmission modes. That is, the removable energy units 200-1 to 200-4 can discharge in a customized or preset manner. The power transmission modes will be described in more detail below.

[0092] In some examples, a single controller 220 (system controller) controls each of two or more removable energy units 200-1 to 200-4 (e.g. Figure 2 (As shown in the diagram). In some examples, controller 220 may include multiple system controllers 220-1 to 220-4 (e.g., Figure 3 and Figure 5 (As shown in the diagram). In some examples, system controllers 220-1 to 220-4 can each be independent controllers (e.g., Figure 1 and Figure 4 (As shown in the diagram). Controller 220 or controllers 200-1 to 200-4 may be a charger IC, part of a charger IC, and / or include a charger IC. Controller 220 or controllers 220-1 to 220-4 may be operable to initiate charging of another removable energy unit among two or more removable energy units 200-1 to 200-4 by discharging one of the removable energy units 200-1 to 200-4.

[0093] For example, each of two or more removable energy units 200-1 to 200-4 may include controllers 220-1 to 220-4 (i.e., system controllers) configured to control the respective energy unit. That is, controller 220-1 can control removable energy unit 200-1, controller 220-2 can control removable energy unit 200-2, and so on. System controllers 220-1 to 220-4 may be controller 220.

[0094] Controllers 220-1 to 220-4 (or controller 220) can be configured to be controlled by device controller 420 of aerosol generating device 400 (e.g., Figure 4 and Figure 5 (As shown in the diagram). The device controller 420 can be a single device controller 420 or multiple device controllers, each configured to control a corresponding system controller 220-1 to 220-4 or a corresponding removable energy unit 200-1 to 200-4. System controllers 220-1 to 220-4 can be configured to act as one or more slave devices, while device controller 420 can be configured to act as a master device, which is configured to control one or more slave devices.

[0095] Alternatively, the device controller 420 of the aerosol generating device 100 can directly control each of two or more removable energy units 200-1 to 200-4. That is, the modular energy system 100 may not include a controller.

[0096] In some embodiments (such as) Figure 3 and Figure 5 As shown in the diagram, the modular energy system 100 may include three or more removable energy units 200-1 to 200-4. For example, Figures 3 to 5The modular energy system 100 shown has four removable energy units 200-1 to 200-4. Aside from the presence of more removable energy units, these examples are operationally similar to... Figure 2 The modular energy system shown is the same.

[0097] Each of the removable energy units 200-1 to 200-4 is removable from the modular energy system 100. For example, the removable energy units 200-1 to 200-4 can be removed for charging, replacement, storage, or disposal. Users can carry additional removable energy units 200-1 to 200-4 to insert into the modular energy system 100 when needed.

[0098] The modular energy system 100 may include a power inlet (not shown) for connection to a power source. The power inlet may be present on each of the two or more removable energy units 200-1 to 200-4. When the modular energy system 100 is inserted into the aerosol generating device 400, the power inlet of the modular energy system 100 (or the two or more removable energy units 200-1 to 200-4) is accessible to a user. Alternatively or additionally, the aerosol generating device 400 may include a power inlet (not shown) for connection to a power source, and this power inlet is configured to supply power to the two or more removable energy units 200-1 to 200-4 of the modular energy system 100 for charging.

[0099] Modular energy system 100 may include combinations of two or more removable energy units 200-1 to 200-2, such as Figure 1 As shown in the diagram. In some examples, the modular energy system 100 may include a housing or body 250 (such as...). Figure 2 (As shown) to accommodate components constituting the modular energy system 100. For example, housing 250 may accommodate two or more removable energy units 200-1 to 200-4 and (if present) system controller 220 and / or multiple system controllers 220-1 to 220-4.

[0100] Controller 220 or controllers 220-1 to 220-4 can be configured to receive power status information from each of the plurality of removable energy units 200-1 to 200-4. Controller 220 or controllers 220-1 to 220-4 can be configured to determine the power status of each of the removable energy units 200-1 to 200-4.

[0101] Each of two or more removable energy units 200-1 to 200-2 may include a corresponding indicator 260-1 to 260-2 (e.g. Figure 1(As shown in the diagram). For example, when there are four removable energy units 200-1 to 200-4, there can be four corresponding indicators 260-1 to 260-4. Alternatively or additionally, the indicators 260 can be disposed on the body 250 of the modular energy system 100 (as shown in the diagram). Figures 2 to 4 (As shown in the diagram). When the modular energy system is inserted into the aerosol generating device 400, indicator 260 or indicators 260-1 to 260-2 may be visible to the user. Alternatively, indication may be facilitated by indicator 460 of the aerosol generating device 400 (e.g., Figure 5 (As shown in the diagram). The indicator 460 can be controlled by the controller 220 or controllers 220-1 to 220-4 of the modular energy system 100, and / or can be controlled by the device controller 420 of the aerosol generating device 400.

[0102] Indicators 260, 260-1 to 260-2, and 460 can be configured to indicate the power status of two or more removable energy units 200-1 to 200-4. Indicators 260, 260-1 to 260-2, and 460 can be configured to indicate one or more of the two or more removable energy units 200-1 to 200-4 that require replacement or recharging. That is, each of indicators 260-1 to 260-2 can indicate the power status of each corresponding removable energy unit 200-1 to 200-2. Indicators 260 or 460 can indicate the total combined power of two or more removable energy units 200-1 to 200-4. Indicators 260 or 460 can indicate the power status of each energy unit 200-1 to 200-4. Indicators 260, 260-1 to 260-2, and 460 can be configured to indicate the currently used power delivery mode. Indicators 260, 260-1 to 260-2, and 460 can be configured to receive input to allow a user to select the power delivery mode to use. Indicators 260, 260-1 to 260-2, and 460 can be configured to receive input from a user to select the removable energy units 200-1 to 200-4 to be discharged. The power delivery mode and / or the energy units 200-1 to 200-4 to be discharged can be selected remotely; for example, the user can make this selection using a remote device.

[0103] Indicators 260, 260-1 to 260-2, and 460 may be lights, such as LEDs, configured to switch between states. For example, indicators 260, 260-1 to 260-2, and 460 may be configured to switch between an on and off state. Indicators 260, 260-1 to 260-2, and 460 may be configured to switch between colors. Indicators 260, 260-1 to 260-2, and 460 may be any visual, auditory, or haptic feedback function.

[0104] Multiple power transmission modes may include a first power transmission mode in which energy units 200-1 to 200-4 are discharged in the order they were last installed in the system. This first power transmission mode may be referred to as a convenience mode. Further, optional details of the first power transmission mode are described below.

[0105] Figure 6 A flowchart 600 of the first power transmission mode is shown. In step 602, system 100 (or controllers 220, 220-1 to 220-4) can determine how many energy units 200-1 to 200-4 are available. In step 604, if no energy units 200-1 to 200-4 are available, or if the only available energy units 200-1 to 200-4 do not provide energy for the entire cycle (i.e., consume a single consumable), indicators 260, 260-1 to 260-2, 460 can indicate that system 100 is in a completely empty state.

[0106] In step 606, if at least one energy unit 200-1 to 200-4 is available and the at least one energy unit has a certain amount of energy for at least one cycle, then indicators 260, 260-1 to 260-2, 460 can indicate that device 400 is in a ready state.

[0107] In step 608, if more than one energy unit 200-1 to 200-4 is available and each energy unit has sufficient energy for at least one cycle, then system 100 (or controllers 220, 220-1 to 220-4) can detect which energy unit 200-1 to 200-4 was most recently installed. For example, it can detect which energy unit is located at the bottom of the system (i.e., the energy unit 200-1 to 200-4 that is most easily accessible to the user or was most recently installed). This detection can be performed by detecting which energy unit 200-1 to 200-4 was last connected to system 100, or it can be performed physically by checking the voltage pins of the unit. In some examples, system 100 (or controllers 220, 220-1 to 220-4) includes a memory for recording the installation order of the energy units.

[0108] In step 610, system 100 can discharge the most recently installed energy units 200-1 to 200-4.

[0109] Figure 7 Additional steps of flowchart 600 are shown. Step 612 may include detecting newly inserted (e.g., added, connected, and / or joined) energy units 200-1 to 200-4 into system 100. In step 614, the user can initiate recharging of higher (i.e., earlier installed) energy units 200-1 to 200-4 with the most recently inserted energy unit 200-1 to 200-4. That is, the user can input a command to indicators 260, 260-1 to 260-2, 460 to initiate charging of one of two or more energy units 200-1 to 200-4 by the most recently installed energy unit 200-1 to 200-4.

[0110] Multiple power delivery modes may include a second power delivery mode in which energy cells 200-1 to 200-4 are selected to discharge sequentially based on a calculated capacity decay coefficient for each of two or more energy cells 200-1 to 200-4. This second power delivery mode may be referred to as a battery life mode. Further details regarding the optional second power delivery mode are described below.

[0111] Figure 8 A flowchart 800 of the second power transmission mode is shown. In step 802, system 100 (or controllers 220, 220-1 to 220-4) can determine how many energy units 200-1 to 200-4 are available. In step 804, if no energy units 200-1 to 200-4 are available, or if the only available energy units 200-1 to 200-4 do not provide energy for the entire cycle (i.e., consume a single consumable), indicators 260, 260-1 to 260-2, 460 can indicate that system 100 is in a completely empty state.

[0112] In step 806, if at least one energy unit 200-1 to 200-4 is available and the at least one energy unit has a certain amount of energy for at least one cycle, then indicators 260, 260-1 to 260-2, 460 can indicate that device 400 is in a ready state.

[0113] In step 808, system 100 (or controllers 220, 220-1 to 220-4) is configured to follow a certain algorithm to determine which energy units 200-1 to 200-4 should be discharged. For example, the energy units 200-1 to 200-4 can be selected for discharge based on the state of charge and / or temperature of each energy unit 200-1 to 200-4. Figure 9This method can be seen in [the text].

[0114] In step 810, system 100 (or controllers 220, 220-1 to 220-4) may check the state of charge and / or ambient temperature of each energy unit 200-1 to 200-4. In step 812, system 100 (or controllers 220, 220-1 to 220-4) may estimate the change in the state of charge of each energy unit 200-1 to 200-4 after a cycle (e.g., after a consumable is consumed). The change in state of charge will vary depending on the initial state of charge and lifetime of each energy unit 200-1 to 200-4.

[0115] In step 814, system 100 (or controllers 220, 220-1 to 220-4) can check which energy unit 200-1 to 200-4 has the highest expected energy capacity decay coefficient. This energy unit 200-1 to 200-4 can then be selected for discharge. That is, the second power delivery mode can select energy units 200-1 to 200-4 that are optimal in terms of lifespan and discharge rate under normal use. This can be referred to as a simplified implementation of the second power delivery mode.

[0116] Figure 10 A flowchart 800 with additional optional steps is shown, which are used to calculate the energy cells 200-1 to 200-4 to be selected for discharge. For example, after step 808, flowchart 800 can be divided into a first path and a second path. The first path can be referred to as the calendar aging line. The second path can be referred to as the cycle life line.

[0117] Following the first path, the steps can be the same as steps 810 to 814 of a simplified implementation of the second power transmission mode (e.g.) Figure 9 The steps are largely the same as shown in the diagram. That is, step 820 can be the same as step 810, step 822 can be the same as step 812, and step 824 can be the same as step 814.

[0118] Now following the second path, step 830 includes determining the maximum state of charge (i.e., maximum charge capacity) after each of energy cells 200-1 to 200-4 has been fully charged. The maximum charge capacity is then compared to a threshold charge capacity (i.e., a percentage of the initial maximum charge capacity). For example, the threshold could be 30% of the normal (i.e., initial) capacity.

[0119] In step 832, the ambient temperature is measured, and the state of charge after one cycle (i.e., after consuming one consumable) is determined. Based on this, the depth of discharge after the assumed cycle is calculated.

[0120] In step 834, for each energy cell 200-1 to 200-4, the expected capacity decay factor is estimated using the information from steps 830 and 832.

[0121] In step 840, for each energy unit 200-1 to 200-4, the expected attenuation coefficients calculated from steps 824 and 834 are combined. Energy units 200-1 to 200-4 with the smaller combined attenuation factor are selected for discharge. This can be referred to as a more complex implementation of the second power transmission mode.

[0122] Multiple power transmission modes may include a third power transmission mode in which energy units 200-1 to 200-4 are selected to discharge sequentially based on the current state of charge of each of two or more energy units 200-1 to 200-4. That is, energy units 200-1 to 200-4 may be selected for discharge in descending order based on their current state of charge. The third power transmission mode may include selecting energy units 200-1 to 200-4 with the highest state of charge for discharge until said energy units 200-1 to 200-4 are no longer the energy units with the highest state of charge. Then, different energy units 200-1 to 200-4 may be selected for discharge. Figure 11 A flowchart 1100 of the third power transmission mode is shown, and it is described in more detail below. The third power transmission mode may be referred to as the security mode. Furthermore, optional details of the third power transmission mode are described below.

[0123] Figure 11 A flowchart 1100 of the third power transmission mode is shown. In step 1102, system 100 (or controllers 220, 220-1 to 220-4) can determine how many energy units 200-1 to 200-4 are available. In step 1104, if no energy units 200-1 to 200-4 are available, or if the only available energy units 200-1 to 200-4 do not provide energy for the entire cycle (i.e., consume a single consumable), indicators 260, 260-1 to 260-2, 460 can indicate that system 100 is in a completely empty state.

[0124] In step 1106, if at least one energy unit 200-1 to 200-4 is available and the at least one energy unit has a certain amount of energy for at least one cycle, then indicators 260, 260-1 to 260-2, 460 can indicate that the device 400 is in a ready state.

[0125] In step 1108, for each energy unit 200-1 to 200-4, the state of charge difference is calculated. The state of charge difference can be the actual state of charge minus a threshold state of charge. For example, the threshold state of charge can be 30% of the total state of charge. That is, the state of charge difference is the difference between the current state of charge and the threshold state of charge. Then, the state of charge difference can be used to calculate the number of available cycles for each energy unit 200-1 to 200-4.

[0126] In step 1110, energy cells 200-1 to 200-4 with the highest number of available cycles are selected for discharge. These steps are then repeated after each cycle to determine new energy cells 200-1 to 200-4 with the highest number of available cycles. This can be the same energy cells 200-1 to 200-4 or different energy cells 200-1 to 200-4.

[0127] Multiple power delivery modes may include a fourth power delivery mode in which energy units 200-1 to 200-4 are selected for discharge based on user input. That is, system 100 (or controllers 220, 220-1 to 220-4) is operable to allow the user to select the discharge sequence of two or more energy units 200-1 to 200-4. This selection can be made using indicators 260, 260-1 to 260-2, and 460. This fourth power delivery mode may be referred to as manual mode.

[0128] As briefly described above, Figure 4 and Figure 5 A cross-sectional view of an example of an aerosol generating device 400 with a modular energy system 100 inserted is shown.

[0129] The aerosol generating device 400 includes a modular energy system 100 comprising two or more removable energy units 200-1 to 200-4 (as described above). The two or more removable energy units 200-1 to 200-4 are configured to be controlled to discharge according to a selected power transmission mode among a variety of power transmission modes. The two or more energy units 200-1 to 200-4 can also be configured to be controlled to sequentially charge each to a partial state of charge.

[0130] The aerosol generating apparatus 400 may be adapted to receive consumable articles (not shown) therein. For example, the aerosol generating apparatus 400 may include a chamber 430 in which the consumable articles are received.

[0131] The aerosol generating device 400 may include a body 440. The body 440 may be configured to house components of the aerosol generating device 400. For example, the body 400 may house a modular energy system 100.

[0132] The aerosol generating device 400 may include a heating unit 410 configured to provide heat to aerosol precursor material within a consumable article during use to generate an aerosol. Alternatively, the aerosol generating device 400 may include a plurality of heating units 410. The heating unit 410 is configured to receive power from at least one of two or more removable energy units 200-1 to 200-4 of the modular energy system 100. In some embodiments, the heating unit 410 is configured to receive power from each of the two or more removable energy units 200-1 to 200-4.

[0133] The heating unit 410 can be positioned to come into thermal contact with the aerosol precursor material of the consumable product during use to heat it. The heating unit 410 can be a coil, induction coil and sensor arrangement, ceramic heater, resistance heater, flat resistance heater, mesh heater, MEMS heater, thin film heater, etc., configured to heat the aerosol precursor material of the consumable product.

[0134] The aerosol generating device 300 may include a cover 450. The cover 450 may be configured to enclose components of the aerosol generating device 400. In particular, the cover 450 may be configured to cover the chamber 430.

[0135] As described above, the aerosol generating device 400 may include a device controller 420. The device controller 420 may be configured to control each of two or more removable energy units 200-1 to 200-4.

[0136] Indicator 460 (e.g.) Figure 5 The indicator 460 (shown in the diagram) can be integrated with or located on the body 440 of the aerosol generating device 400. The indicator 460 can be located on an internal component of the aerosol generating device 400 and is visible to the user through an opening or transparent section in the body 440. As described above, the indicator can be a component of a modular battery system. The indicator 460 can be integrated with... Figure 4 The examples shown are used together, but for the sake of brevity, they are not included in the accompanying drawings.

[0137] Figure 12 An example flowchart of a discharge method 1200 for two or more removable energy units 200-1 to 200-4 in a modular energy system 100 for an aerosol generating device 400 is shown. Method 1200 includes step 1210: selecting one or more of the energy units 200-1 to 200-4 for discharge according to a selected power transmission mode among a variety of power transmission modes.

[0138] Method 1200 may include step 1220: receiving input from a user to select a power delivery mode from a variety of power delivery modes. The method may include step 1230: displaying the charge status of the currently discharging energy unit and / or the charge status of the currently discharging energy unit on indicators 260, 260-1 to 260-2, 460.

[0139] Figure 13 The diagram illustrates an example of a conventional charging system. This system demonstrates the widely adopted constant current, constant voltage charging method. Other existing methods, such as pulse charging, face similar limitations to those described herein. The graph shows the charging current 500 and the energy cell voltage 510 (also referred to as the cell voltage). The x-axis of the graph represents time, while the y-axis represents the increasing charging current 500 and energy cell voltage 510.

[0140] like Figure 13 As shown in the graph, under constant current charging 502, the charging current 500 is constant at 500-1, while the cell voltage 510 increases at 510-1. During the later stages of charging the energy cell (i.e., when the energy cell's state of charge is above 70%), constant voltage charging 504 can be used. During constant voltage charging 504, the cell voltage 510 is constant at 510-2, while the charging current 500 decreases at 500-2.

[0141] The energy unit is in a fully charged state (520) after being fully charged.

[0142] Figure 13 The existing method shown does not allow the use of available charging power—even if it is available in the later stages of charging. That is to say, the charging speed is significantly reduced. If multiple energy cells are charged simultaneously, the same constant current divided by the number of cells also reduces the overall charging speed.

[0143] Two or more energy units 200-1 to 200-4 can be configured to be controlled by controller 220 to charge each of them sequentially to a partial state of charge. That is, controller 220 can be configured to charge the first energy unit 200-1 to a partial state of charge, then charge the second energy unit 200-2 to a partial state of charge, and so on. Figure 14 The details of this arrangement can be seen in the image, and will be described below.

[0144] The sequential charging of two or more energy units 200-1 to 200-4 to a partial charge state can be described as the first charging stage 702, 704 (e.g. Figure 14(As shown in the diagram). A partial state of charge can refer to a state of charge between 50% and 90%, preferably between 60% and 80%, and more preferably between 65% and 75% (e.g., 70%). By sequentially charging two or more energy units 200-1 to 200-4 to a partial state of charge, each of the energy units 200-1 to 200-4 can be partially charged in the fastest and / or most efficient manner.

[0145] Controller 220 or controllers 220-1 to 220-4 can be configured to charge two or more energy units 220-1 to 220-4 in parallel while each of the energy units 220-1 to 220-4 is charged to a partial state of charge. The two or more energy units 220-1 to 220-4 can be charged in parallel, for example, until these energy units are at full charge (100% charge). Charging two or more energy units 200-1 to 200-4 in parallel to a full state of charge can be described as a second charging stage 706.

[0146] That is to say, in the first charging stages 702 and 704, energy units 200-1 to 200-4 can be charged sequentially, while in the second charging stage 706, energy units 200-1 to 200-4 can be charged in parallel.

[0147] In one example, controller 220 or controllers 220-1 to 220-4 can be configured to determine the state of charge of each of the energy units 200-1 to 200-4 by measuring the charging current transmitted to each of the respective energy units 200-1 to 200-4. Controller 220 or controllers 220-1 to 220-4 can be configured to reach a first predetermined charging current threshold 720, 730 based on the measured charging current of each of the respective energy units 200-1 to 200-4. Figure 14 (As shown in the diagram) and charging of the energy unit is stopped. The first predetermined charging current thresholds 720 and 730 are charging currents that indicate that the energy units 200-1 to 200-4 are in a partially charged state. For example, the first predetermined charging current thresholds 720 and 730 can be represented by a current level between 1% and 20% of the maximum current of the energy unit.

[0148] During parallel charging of energy units 200-1 to 200-4 (i.e., the second charging phase 706), controller 220 or controllers 220-1 to 220-4 can be configured to periodically measure the charging current transmitted to each of the energy units 220-1 to 220-4. During parallel charging, controller 220 or controllers 220-1 to 220-4 can be configured to stop charging energy units 200-1 to 200-4 based on the measured charging current reaching a second predetermined charging current threshold 740, 750. The second predetermined charging current threshold 740, 750 is the charging current indicating that energy units 200-1 to 200-4 are in a fully charged state.

[0149] like Figure 14 As shown, at 706, the current and voltage can undergo an initial polarization process (e.g., charging the double-layer capacity present in the battery). That is, the voltage can initially increase.

[0150] Figure 14 The diagram illustrates the charging system of the present invention. The graph shows the charging current 700 and the energy unit voltage 710. The x-axis of the graph represents time, while the y-axis represents the increasing charging current 700 and energy unit voltage 710.

[0151] During the first stages 702 and 704, the first energy unit 200-1 is charged. When the charging current 700 of the first energy unit reaches a first predetermined charging current threshold 720, power supply to the first energy unit 200-1 is stopped. Then, the second energy unit 200-2 is charged until the charging current 700 of the second energy unit 200-2 reaches the first predetermined charging current threshold 720. This process continues for any subsequent energy unit.

[0152] When the charging current 700 of each of energy units 200-1 to 200-4 reaches a first predetermined charging current threshold 720, the system switches to the second stage 706. During the second stage 706, energy units 200-1 to 200-4 are charged in parallel. During the second stage 706, controller 220, controllers 220-1 to 220-4, and / or controller 420 can periodically check the charging current of each of energy units 200-1 to 200-4. If it is determined that the charging current of any one of energy units 200-1 to 200-4 has reached a second predetermined charging current threshold 730 or 740, power supply to that unit can be stopped, thereby increasing the charging speed of any remaining energy units.

[0153] Controller 220 or controllers 220-1 to 220-4 can be configured to monitor the current of each of energy units 200-1 to 200-4. Controller 220 or controllers 220-1 to 220-4 can be configured to integrate the current over time to determine the health status of each of the corresponding energy units 200-1 to 200-4. That is, the integrated current value can indicate the health status of each of the energy units 200-1 to 200-4. The health status indication of each of the energy units 200-1 to 200-4 can be determined by the percentage change in the integrated current value. For example, if the integrated current value does not decrease or decreases to a value of at most 20%, this can indicate that the energy units 200-1 to 200-4 are in a healthy state. If the integrated current value decreases by more than 20%, this can indicate that the energy units 200-1 to 200-4 are in an unhealthy state. This characteristic can be monitored when the energy units 200-1 to 200-4 are charged sequentially or in parallel.

[0154] Based on the determined health status of each of the corresponding energy units 200-1 to 200-4, controller 220 or controllers 220-1 to 220-4 can control the modular energy system 100 (via an indicator) to provide an indication that energy units 200-1 to 200-4 need to be replaced.

[0155] Indicators 260, 260-1 to 260-2, 460 can be configured to indicate that one or more of two or more energy units 200-1 to 200-4 are in a healthy or unhealthy state. Indicators 260, 260-1 to 260-2, 460 can be further configured to indicate that one or more of two or more energy units 200-1 to 200-4 are in an intermediate state.

[0156] Figure 15 An example flowchart of a charging method 900 for two or more energy units 200-1 to 200-4 in a modular energy system 100 for an aerosol generating device 400 is shown, the method including step 810: sequentially charging each of the energy units 200-1 to 200-4 to a partially charged state.

[0157] Method 900 may include a second step 920: measuring the charging current transmitted to each of the energy units 200-1 to 200-4 to determine the state of charge of each of the energy units. Method 900 may include a third step 930: stopping charging the energy unit when the measured charging current of one of two or more energy units 200-1 to 200-4 reaches a first predetermined charging current threshold 720, 730. The first predetermined charging current threshold 720, 730 may indicate a partial state of charge. Method 900 may include a fourth step 940: charging the energy units 200-1 to 200-4 in parallel while each of them is charged to a partial state of charge until each of the energy units is in a fully charged state.

[0158] Method 900 may include the additional steps of: periodically measuring the charging current delivered to each of the respective energy units 200-1 to 200-4 during parallel charging; and stopping charging the energy units based on the measured charging current reaching a second predetermined charging current threshold 740, 750. The second predetermined charging current threshold 740, 750 may indicate a state of full charge.

[0159] Although preferred embodiments have been shown and described, those skilled in the art will understand that various changes and modifications can be made without departing from the scope of the invention as defined in the appended claims and as described above.

Claims

1. An aerosol generating device, the aerosol generating device comprising: A modular energy system (100) comprising two or more removable energy units (200-1 to 200-4). Each of the two or more removable energy units (200-1 to 200-4) is configured to be controlled to discharge according to a selected power transmission mode among a variety of power transmission modes.

2. The aerosol generating device according to claim 1, wherein, Each of the two or more removable energy units (200-1 to 200-4) includes a system controller (220-1 to 220-4) configured to control the discharge of the respective removable energy unit (200-1 to 200-4).

3. The aerosol generating apparatus according to claim 2, further comprising an apparatus controller (220) configured to control the discharge of the two or more removable energy units (200-1 to 200-4).

4. The aerosol generating apparatus according to claim 3, wherein, The device controller (220) is configured to receive power status information from each of the two or more removable energy units (200-1 to 200-4).

5. The aerosol generating apparatus according to any one of the preceding claims, comprising a heating unit, wherein, Each of the two or more removable energy units (200-1 to 200-4) is configured to provide energy to the heating unit.

6. The aerosol generating apparatus according to claim 5, further comprising a heater energy unit, wherein, The heater energy unit is integrated with the heating unit.

7. The aerosol generating apparatus according to any one of the preceding claims, wherein, The energy system (100) includes one or more indicators (260, 260-1 to 260-4) configured to indicate the electrical status of the two or more removable energy units (200-1 to 200-4).

8. The aerosol generating apparatus according to any one of the preceding claims, wherein, These multiple power transmission modes include a first power transmission mode in which the removable energy units (200-1 to 200-4) discharge sequentially based on their installation in the system (100).

9. The aerosol generating apparatus according to any one of the preceding claims, wherein, These multiple power transmission modes include a second power transmission mode in which the removable energy units (200-1 to 200-4) are selected to discharge sequentially based on a calculated capacity decay coefficient for each of the two or more removable energy units (200-1 to 200-4).

10. The aerosol generating apparatus according to any one of the preceding claims, wherein, These multiple power transmission modes include a third power transmission mode in which the removable energy units (200-1 to 200-4) are selected to discharge sequentially based on the current state of charge of each of the two or more removable energy units (200-1 to 200-4).

11. The aerosol generating apparatus according to claim 10, wherein, The order based on the current battery status is descending.

12. The aerosol generating apparatus according to claim 11, wherein, The third power transmission mode includes selecting the removable energy unit (200-1 to 200-4) with the highest charge state for discharge until the removable energy unit (200-1 to 200-4) is no longer the removable energy unit (200-1 to 200-4) with the highest charge state.

13. The aerosol generating apparatus according to any one of the preceding claims, wherein, These multiple power transmission modes include a fourth power transmission mode in which the discharge sequence of two or more removable energy units (200-1 to 200-4) is based on user input.

14. The aerosol generating apparatus according to any one of claims 2 to 3, wherein, The two or more energy units (200-1 to 200-4) are configured to be controlled by the device controller (220) or these system controllers to charge each of them sequentially to a partial charge state.

15. The aerosol generating apparatus according to claim 14, wherein, Each of these system controllers (220-1 to 220-4) is configured to determine the state of charge of each of these energy units (200-1 to 200-4) by measuring the charging current (700) transmitted to each of the respective energy units (200-1 to 200-4).

16. The aerosol generating apparatus according to any one of claims 14 to 15, wherein, Each of these system controllers (220-1 to 220-4) is configured to stop charging each corresponding energy unit (200-1 to 200-4) based on the measured charging current (700) reaching a first predetermined charging current threshold (720, 730).

17. The aerosol generating apparatus according to any one of claims 14 to 16, wherein, These system controllers (220-1 to 220-4) are configured to charge the energy units (200-1 to 200-4) in parallel when each of them is charged to a partial charge state.

18. The aerosol generating apparatus according to claim 17, wherein, During parallel charging, these system controllers (220-1 to 220-4) are configured to periodically measure the charging current (700) transmitted to each of the respective energy units (200-1 to 200-4).

19. The aerosol generating apparatus according to claim 18, wherein, During parallel charging, these system controllers (220, 220-1 to 220-4) are configured to stop charging the energy units (200-1 to 200-4) based on the measured charging current (700) reaching a second predetermined charging current threshold (740, 750).

20. A method for discharging two or more removable energy units (200-1 to 200-4) in a modular energy system (100) of an aerosol generating device, the method comprising: Based on the selected power transmission mode among a variety of power transmission modes, one or more of these removable energy units (200-1 to 200-4) are selected for discharge.

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