Charging voltage detection method and aerosol generating device

Abstract

The invention discloses a charging voltage detection method and an aerosol generation device. The charging voltage detection method is used for detecting the voltage of a battery cell in an aerosol generation device, and comprises the following steps: in a constant-voltage charging process of the battery cell, controlling the charging current of the battery cell to be zero in at least one time period, and detecting the voltage of the battery cell in the time period when the charging current of the battery cell is zero, therefore, whether the electric core is fully charged is determined. By means of the mode, whether the battery cell is fully charged or not can be accurately detected, so that the charging quality is improved, and the suction cruising ability of the aerosol generating device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic atomization, and in particular to a charging voltage detection method and an aerosol generating device. Background Art

[0002] In an aerosol generating device, an aerosol-forming substrate is generally heated by a heating body to generate an inhalable aerosol. The aerosol-forming substrate can be a liquid substrate, such as tobacco oil; or a solid substrate, such as an aerosol generating product, i.e., a cigarette.

[0003] Among them, a rechargeable battery cell is arranged in the aerosol generating device, and the rechargeable battery cell needs to be detected when being charged. However, currently, whether the battery cell is fully charged often causes misjudgment, thereby affecting the charging quality and the suction endurance of the aerosol generating device. Summary of the invention

[0004] The present application aims to provide a charging voltage detection method and an aerosol generating device, which can more accurately detect whether the battery cell is fully charged, so as to improve the charging quality and increase the suction endurance of the aerosol generating device.

[0005] To achieve the above objectives, in a first aspect, the present application provides a charging voltage detection method for detecting the voltage of a battery cell in an aerosol generating device, the method comprising:

[0006] When the battery cell is in constant voltage charging, the charging current of the battery cell is controlled to be zero in at least one time period, and the voltage of the battery cell is detected during the time period when the charging current of the battery cell is zero to determine whether the battery cell is fully charged.

[0007] In an optional manner, when the battery cell is in constant voltage charging, controlling the charging current of the battery cell to be zero in at least one time period, and detecting the voltage of the battery cell in the time period when the charging current of the battery cell is zero, includes:

[0008] During the constant voltage charging of the battery cell, N cycles are set, wherein N is an integer ≥ 1, and each of the N cycles includes a charging duration for charging the battery cell and a detection duration for controlling the charging current of the battery cell to be zero;

[0009] The voltage of the battery cell is detected within each detection time period.

[0010] In an optional manner, the charging duration is greater than the detection duration.

[0011] In an optional manner, during the constant voltage charging of the battery cell, N cycles are set, including:

[0012] In a first time period during the process of the battery cell being charged at a constant voltage, J first cycles are set, where J is an integer and 1 ≤ J ≤ N. The start time of the first time period is the start time of the battery cell being charged at a constant voltage, and the duration of each of the J first cycles is greater than a first preset duration.

[0013] In an optional manner, during the process of the battery cell being charged at a constant voltage, setting N cycles further includes:

[0014] In a second time period during the process of the battery cell being charged at a constant voltage, K second cycles are set, where K is an integer and 2 ≤ J + K ≤ N. The start time of the second time period is the end time of the first time period, and the duration of the second cycle is less than the duration of the first cycle.

[0015] In an optional manner, during the process of the battery cell being charged at a constant voltage, setting N cycles further includes:

[0016] In the second time period, K first cycles and K third cycles are further set, and they are cyclically set in a group with one first cycle, one third cycle, and one second cycle, where 4 ≤ J + 3K ≤ N. The duration of the third cycle is less than the duration of the first cycle and greater than the duration of the second cycle.

[0017] In an optional manner, the detection duration in the first cycle > the detection duration in the third cycle > the detection duration in the second cycle.

[0018] In an optional manner, the method further includes:

[0019] Configuring the moment when the charging current of the battery cell is equal to a first preset current as the end time of the first time period, and / or, configuring the moment when the temperature of the circuit board including the charging chip for charging the battery cell is equal to a first preset temperature as the end time of the first time period.

[0020] In an optional manner, detecting the voltage of the battery cell within each detection duration includes:

[0021] Detecting the voltage of the battery cell at the middle moment of each detection duration.

[0022] In a second aspect, the present application provides an aerosol generating device, including:

[0023] A battery cell for supplying power;

[0024] A charging chip and a controller, wherein the charging chip is electrically connected to the controller and the battery cell respectively, and the charging chip is used to charge the battery cell when receiving an enable signal output by the controller, and stop charging the battery cell when not receiving the enable signal;

[0025] The controller is electrically connected to the battery cell, and the controller includes: at least one processor and a memory communicatively connected to the at least one processor, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method as described above.

[0026] The beneficial effect of the present application is that the charging voltage detection method provided by the present application is used to detect the voltage of the battery cell in the aerosol generating device. The charging voltage detection method can reduce the probability of misjudgment by controlling the charging current of the battery cell to be zero in at least one time period when the battery cell is in constant voltage charging, and detecting the voltage of the battery cell during the time period when the charging current of the battery cell is zero, thereby more accurately detecting whether the battery cell is fully charged, thereby improving the charging quality and improving the suction endurance of the aerosol generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0028] Figure 1 A schematic diagram of the structure of an aerosol generating device provided in Example 1 of the present application;

[0029] Figure 2 A schematic diagram of the structure of an aerosol generating device provided in Example 2 of the present application;

[0030] Figure 3 A schematic diagram of the structure of a circuit in an aerosol generating device provided in Example 1 of the present application;

[0031] Figure 4 A flowchart of a charging voltage detection method provided in Embodiment 1 of the present application;

[0032] Figure 5 The first embodiment of the present application provides Figure 4 A schematic diagram of an implementation of step 401 shown in FIG.

[0033] Figure 6 A schematic diagram of N cycles provided in Example 1 of the present application;

[0034] Figure 7For the first embodiment of the present application Figure 5 A schematic diagram of an embodiment of step 501 shown in

[0035] Figure 8 A schematic diagram of the first cycle and the second cycle provided by the first embodiment of the present application;

[0036] Figure 9 A schematic diagram of the first cycle, the second cycle and the third cycle provided by the first embodiment of the present application. Detailed implementation manners

[0037] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0038] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of an aerosol generating device provided by an embodiment of the present application. As Figure 1 shown, the aerosol generating device 100 includes a receiving cavity having an opening 10, and an aerosol generating substrate 20, such as a cigarette, is removably received in the receiving cavity through the opening 10.

[0039] Among them, the aerosol generating substrate 20 can be a tobacco-containing material that releases volatile compounds from the substrate when heated; or it can also be a non-tobacco material that is suitable for electric heating and smoking after heating. The aerosol generating substrate 20 can also be a solid substrate, which can include one or more of powder, granule, fragment, strip, or sheet of vanilla leaf, tobacco leaf, homogenized tobacco, expanded tobacco, etc.; or the solid substrate can contain additional tobacco or non-tobacco volatile flavor compounds to be released when the substrate is heated.

[0040] The aerosol generating device 100 further includes a susceptor 30, which is prepared from a soft magnetic alloy material with a Curie temperature not lower than 350 °C; the preparation material of the susceptor 30 is, for example, stainless steel, iron-nickel alloy, iron-aluminum alloy, etc.; in use, the susceptor 30 can be penetrated by a changing magnetic field and generate heat to heat the aerosol generating substrate 20 to generate aerosol. Among them, the susceptor 30 includes an elongated rod-shaped portion and a conical portion. When the cigarette is received in the receiving cavity, the conical portion of the susceptor 30 can be inserted into the aerosol generating substrate 20 for heating, so that part of the active substances in the aerosol generating substrate 20 are heated and volatilized to generate aerosol.

[0041] The aerosol generating device 100 further includes an induction coil 40. The induction coil 40 is a common solenoid coil for generating a changing magnetic field; in use, conductive pins are provided on the induction coil 40 and connected to a circuit 60 through the conductive pins, thereby guiding a changing current to be supplied to the induction coil 40. In an implementation, the material of the induction coil 40 is preferably a good conductor material with a relatively low resistivity and a temperature resistance higher than 500 °C, such as silver, copper, aluminum, nickel, etc., to improve the quality factor Q value of the LC oscillator formed after coupling to the circuit 60. Also, the lead material of the conductive pins of the induction coil 40 is preferably a high electrical conductivity metal material with a temperature resistance higher than 400 °C, such as nickel, silver, etc. The induction coil 40 has approximately 6 to 15 turns and a length of approximately 8 to 15 mm. After assembly, the induction coil 40 surrounds or encircles the receiving cavity. The cross-section of the wire material of the induction coil 40 is in a rectangular shape; specifically, in the cross-section of the wire material of the induction coil 40, the dimension in the axial direction is greater than the dimension in the radial direction; thereby making the wire material of the induction coil 40 in a flat shape.

[0042] The aerosol generating device 100 further includes a battery cell 50. The battery cell 50 is a rechargeable DC battery cell that can output a DC current. In some embodiments, the DC supply voltage provided by the battery cell 50 is in the range of about 2.5 V to about 9.0 V, and the amperage of the DC current that the battery cell 50 can provide is in the range of about 2.5 A to about 20 A.

[0043] The aerosol generating device 100 further includes a circuit 60. The circuit 60 is electrically connected to the rechargeable battery cell 50 appropriately and is used to convert the DC current output by the battery cell 50 into an alternating current with a suitable frequency and then supply it to the induction coil 40, so that the induction coil 40 generates a changing magnetic field. In some embodiments, the frequency of the alternating current supplied by the circuit 60 to the induction coil is between 80 KHz and 400 KHz; more specifically, the frequency can be in the range of about 200 KHz to 300 KHz.

[0044] It should be noted that, as Figure 1 shown, the hardware structure of the aerosol generating device 100 is only an example, and moreover, the aerosol generating device 100 may have more or fewer components than those shown in the figure, two or more components may be combined, or different component configurations may be provided. The various components shown in the figure may be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and / or application specific integrated circuits.

[0045] For example, Figure 2 exemplarily shows an aerosol generating device 100 adopting another heating method. As Figure 2As shown, the electronic atomization device 100 includes a heating element 70. Among them, the heating element 70 is used to heat the aerosol-forming substrate 20 to generate aerosol. The aerosol-forming substrate 20 can be stored in the heating chamber 80 so that the aerosol-forming substrate 20 can be heated in the heating chamber 80. For example, the heating chamber 80 can be arranged close to the heating element 70, so that the thermal energy from the heating element 70 heats the aerosol-forming substrate 20 therein circumferentially to volatilize the aerosol without burning the aerosol-forming substrate 20.

[0046] In addition, in some embodiments, the aerosol generating device 100 generates aerosol by heating and atomizing a liquid aerosol-forming substrate. Specifically, the aerosol generating device 100 includes a liquid storage chamber for storing the liquid aerosol-forming substrate, and a liquid guiding element for conducting the liquid aerosol-forming substrate. The heating element is combined with the liquid guiding element. The liquid guiding element is used to absorb the aerosol-forming substrate and conduct the aerosol-forming substrate to the heating element. The heating element heats the aerosol-forming substrate to atomize it at high temperature to form aerosol, and transmits it to the air outlet of the aerosol generating device 100 through the internal air flow channel. The user can inhale the aerosol at this air outlet. Please refer to Figure 3 , Figure 3 shows a schematic structural diagram of the circuit 60 in the aerosol generating device 100. As Figure 3 shown, the circuit 60 includes a controller 61 and a charging chip 62.

[0047] Among them, the charging chip 62 is electrically connected to the controller 61 and the battery cell 50 respectively. The charging chip 62 is an electronic component for managing and controlling the charging current and voltage. The charging chip 62 is used to charge the battery cell 50 when receiving the enable signal output by the controller 61, and stop charging the battery cell 50 when not receiving the enable signal.

[0048] The stage of the charging chip 62 charging the battery cell 50 usually includes a constant current charging stage and a constant voltage charging stage. In the constant current charging stage, the charging current remains constant, the charged amount increases rapidly, and the voltage of the battery cell 50 rises. When the voltage of the battery cell 50 is charged to a preset voltage value, it enters the constant voltage charging stage. In the constant voltage charging stage, the charging voltage remains constant, the charged amount continues to increase, the voltage of the battery cell 50 rises slowly, and the charging current decreases. It can be seen that in the constant current charging stage, it can be determined that the voltage of the battery cell 50 is not fully charged, so there is no need to adopt the charging voltage detection method provided by the embodiments of the present application. In other words, the charging voltage detection method provided by the embodiments of the present application is applicable to the constant voltage charging stage to accurately determine whether the battery cell 50 is fully charged.

[0049] The controller 61 can be a microcontroller unit (MCU) or a digital signal processing (DSP) controller, etc.

[0050] The control processing unit 61 includes at least one processor 611 and a memory 612. Among them, the memory 612 can be built into the control processing unit 61 or external to the control processing unit 61. The memory 612 can also be a remotely set memory, which is connected to the control processing unit 61 through a network.

[0051] As a non-volatile computer-readable storage medium, the memory 612 can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. The memory 612 can include a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created according to the use of the terminal, etc. In addition, the memory 612 can include high-speed random access memory and can also include non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some embodiments, the memory 612 optionally includes a memory remotely set relative to the processor 611, and these remote memories can be connected to the terminal through a network. Examples of the above network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0052] By running or executing the software programs and / or modules stored in the memory 612 and calling the data stored in the memory 612, the processor 611 executes various functions of the terminal and processes data, thereby performing overall monitoring of the terminal. For example, the charging voltage detection method described in any embodiment of the present application is implemented.

[0053] The processor 611 can be one or more. Figure 1 Taking one processor 611 as an example. The processor 611 and the memory 612 can be connected through a bus or other means. The processor 611 can include a central processing unit (CPU), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a controller, a field programmable gate array (FPGA) device, etc. The processor 611 can also be implemented as a combination of computing devices. For example, a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration.

[0054] Please refer to Figure 4 , Figure 4Flow chart of the charging voltage detection method provided in the embodiment of the present application. The charging voltage detection method is used to detect the voltage of the battery cell in the aerosol generating device. In some embodiments, the aerosol generating device can be Figure 1 or Figure 2 The structure shown in the figure can be found in Figure 1 or Figure 2 The detailed description is not repeated here.

[0055] like Figure 4 As shown, the charging voltage detection method includes the following method steps:

[0056] Step 401: When the battery cell is in constant voltage charging, the charging current of the battery cell is controlled to be zero in at least one time period, and the voltage of the battery cell is detected during the time period when the charging current of the battery cell is zero to determine whether the battery cell is fully charged.

[0057] Specifically, by detecting the voltage of the battery cell during the period when the charging current of the battery cell is zero, the influence of the charging voltage output by the charging chip on the battery cell voltage during the constant voltage stage can be avoided, and the risk of misjudgment can be reduced. Therefore, it is possible to more accurately detect whether the battery cell is fully charged, thereby improving the charging quality and the suction endurance of the aerosol generating device.

[0058] In one embodiment, if Figure 5 As shown, in step 401, when the battery cell is in constant voltage charging, the charging current of the battery cell is controlled to be zero in at least one time period, and the voltage of the battery cell is detected in the time period when the charging current of the battery cell is zero. The specific implementation process includes the following steps:

[0059] Step 501: When the battery cell is in constant voltage charging, N cycles are set, where N is an integer ≥ 1, and each of the N cycles includes a charging time for charging the battery cell and a detection time for controlling the charging current of the battery cell to be zero.

[0060] Step 502: Detect the voltage of the battery cell within each detection time period.

[0061] The total duration of the N cycles may be the entire constant voltage charging time, or may be a portion of the constant voltage charging time.

[0062] by Figure 6 Take this as an example to illustrate. Figure 6As shown, the N cycles include the first cycle T11, the second cycle T12... the Nth cycle T1N. Among them, the first cycle T11 includes a charging duration T111 and a detection duration T112; the second cycle T12 includes a charging duration T121 and a detection duration T122... the Nth cycle T1N includes a charging duration T1N1 and a detection duration T1N2. During each charging duration, the charging voltage is a constant voltage (i.e., the voltage for constant voltage charging); during each detection duration, both the charging voltage and the charging current are zero.

[0063] Subsequently, assuming that the moment t0 is the start moment of the constant voltage charging stage, the voltage of the battery cell can be detected within each detection duration thereafter, that is, the voltage of the battery cell is detected within the detection duration T112, the detection duration T122... the detection duration T1N2, avoiding the influence of the output voltage of the charging chip 62 during constant voltage charging, and thus the actual voltage magnitude of the battery cell can be detected more accurately.

[0064] In some embodiments, the voltage of the battery cell is detected at the middle moment of each detection duration, and the voltage of the battery cell can be detected more accurately. Secondly, in other embodiments, the voltage of the battery cell can also be detected within the range (this range is less than the detection duration) where the middle moment of each detection duration is located, and it also has a high degree of accuracy.

[0065] In addition, by setting N cycles, it is possible to determine whether there is a misjudged abnormal situation by comparing the voltages of the battery cells detected in each cycle, and the wrong data can be excluded when misjudgment occurs, thereby improving the accuracy of the detected data.

[0066] It can be understood that in the embodiments of the present application, the charging durations and detection durations in different cycles can be the same or different, and can be specifically set according to the actual application situation, and the embodiments of the present application do not make specific limitations on this. For example, the charging duration T111 and the charging duration T121 can be the same or different, and the detection duration T112 and the detection duration T122 can be the same or different.

[0067] In some embodiments, the charging duration in each cycle is set to be greater than the detection duration. Thereby, it is possible to avoid the detection duration being too long and resulting in too short a charging duration, and further reducing the charging efficiency. In other words, it is possible to more accurately detect the voltage of the battery cell on the basis of maintaining a high charging efficiency.

[0068] In one embodiment, as Figure 7 shown, the specific implementation process of setting N cycles during the process of the battery cell being in constant voltage charging in step 501 includes the following steps:

[0069] Step 701: In the first time period of the process of constant voltage charging of the battery cell, set J first cycles, where J is an integer and 1 ≤ J ≤ N. The start time of the first time period is the start time of the constant voltage charging of the battery cell, and the duration of each of the J first cycles is greater than the first preset duration. The N cycles include the J first cycles.

[0070] Among them, the first preset duration can be set according to the actual application situation, and the embodiments of the present application do not make specific limitations on this.

[0071] Specifically, when just entering the constant voltage charging stage, in the early stage of constant voltage charging, only need to set the duration of each first cycle to be greater than the first preset duration, so that the voltage detection of a battery cell can be carried out only at intervals of a relatively long time. Thus, while being able to accurately detect the voltage of the battery cell, the duration when the current is zero can be reduced to maintain a high charging efficiency.

[0072] In some embodiments, after step 701 is executed, the specific implementation process of setting N cycles in step 501 during the process of constant voltage charging of the battery cell further includes the following steps: In the second time period of the process of constant voltage charging of the battery cell, set K second cycles, where K is an integer and 2 ≤ J + K ≤ N. The start time of the second time period is the end time of the first time period, and the duration of the second cycle is less than the duration of the first cycle. The N cycles include the K second cycles.

[0073] Specifically, after the first time period ends, since constant voltage charging has been carried out for a period of time, it can be considered that the battery cell may be close to being fully charged, and correspondingly, it can be considered that the later stage of the constant voltage charging stage has been entered. In this case, by using the second cycle with a shorter duration than the first cycle, the frequency of the detection duration can be increased, thereby increasing the frequency of voltage detection of the battery cell, which is beneficial to improving the accuracy of detection to accurately detect whether the battery cell is fully charged.

[0074] Please refer to Figure 8 , Figure 8 which exemplarily shows a way of the first cycle and the second cycle. Among them, the abscissa is time, the ordinate is voltage, the curve L11 is the J first cycles, and the curve L12 is the K second cycles. The J first cycles include the first first cycle T21, the second first cycle T22... the Jth first cycle T2J. The K second cycles include the first second cycle T31, the second second cycle T32... the Kth second cycle T3K.

[0075] As Figure 8As shown, at time t0, the constant-voltage charging process starts, entering the first time period. At this time, J first cycles with a longer duration are set to maintain a high charging efficiency. Until time t10, the first time period ends and the second time period begins. After that, K second cycles with a shorter duration are set to increase the frequency of voltage detection, thereby improving the accuracy of voltage detection. Among them, the K second cycles can be set starting from time t10, or at any time after time t10. The embodiments of the present application do not make specific limitations on this. In this embodiment, taking the K second cycles as an example of being set at a time after time t10.

[0076] In one embodiment, after step 701 is executed, the specific implementation process of setting N cycles in step 501 during the constant-voltage charging process of the battery cell further includes the following steps: In the second time period, K first cycles and K third cycles are also set, and they are cyclically set in a group of one first cycle, one third cycle, and one second cycle, where 4 ≤ J + 3K ≤ N, and the duration of the third cycle is less than the duration of the first cycle and greater than the duration of the second cycle.

[0077] Among them, the N cycles include K first cycles, K second cycles, and K third cycles.

[0078] In this embodiment, cycles of three durations are set for sequential detection at the same time, which can achieve both charging efficiency and detection accuracy in the second time period.

[0079] Please refer to Figure 9 , Figure 9 , which exemplarily shows a way of the first cycle, the second cycle, and the third cycle. Among them, the abscissa is time and the ordinate is voltage. Curve L11 is the J first cycles; curve L12 is the K second cycles; curve L13 is the K first cycles; curve L14 is the K third cycles; curve L15 is the cycles set in the second time period. The J first cycles include the first first cycle T21, the second first cycle T22... the Jth first cycle T2J. The K second cycles include the first second cycle T31, the second second cycle T32... the Kth second cycle T3K. The K first cycles include the (J + 1)th second cycle T51, the (J + 2)th second cycle T52... the Kth second cycle T5K. The K third cycles include the first third cycle T41, the second third cycle T42... the Kth third cycle T4K.

[0080] Among them, as shown in curve L12, curve L13, and curve L14, the duration of the first cycle > the duration of the third cycle > the duration of the second cycle.

[0081] Specifically, as shown by curves L11 and L15, at time t0, the constant-voltage charging process starts and the first time period begins. At this time, J first cycles with a relatively long duration are set to maintain a high charging efficiency. Until time t10, the first time period ends and the second time period begins. Then, a cycle is set by taking one first cycle, one third cycle, and one second cycle as a group. Among them, the (J + 1)-th first cycle T51, the first third cycle T41, and the first second cycle T31 form the first group; the (J + 2)-th first cycle T52, the second third cycle T42, and the second second cycle T32 form the second group... the K-th first cycle T5K, the K-th third cycle T4K, and the K-th second cycle T3K form the K-th group. It is set in the way of the first group, the second group... the K-th group until it is determined that the battery cell is fully charged, which not only maintains a high charging efficiency but also has a high detection accuracy.

[0082] Further, in an embodiment, the detection duration in the first cycle > the detection duration in the third cycle > the detection duration in the second cycle, that is, the detection duration T512 in the first first cycle T51 > the detection duration T412 in the first third cycle T41 > the detection duration T312 in the first second cycle T31... the detection duration T5K2 in the K-th first cycle T5K > the detection duration T4K2 in the K-th third cycle T4K > the detection duration T3K2 in the K-th second cycle T3K.

[0083] In this embodiment, by setting the detection duration to decrease as the cycle length decreases, it can correspondingly ensure that each cycle has a relatively sufficient charging duration. The embodiment of the present application also provides a way to divide the first time period and the second time period. Specifically, the charging voltage detection method further includes the following steps: configuring the moment when the charging current of the battery cell is equal to the first preset current as the end moment of the first time period, and / or, configuring the moment when the temperature of the circuit board including the charging chip for charging the battery cell is equal to the first preset temperature as the end moment of the first time period.

[0084] Specifically, during the constant-voltage charging process, as the voltage of the battery cell gradually increases, the charging current of the battery cell gradually decreases. When the charging current decreases to be equal to the first preset current, it can be determined that the charging enters the later stage, and at this time, it is determined that the first time period ends and the second time period begins. The first preset current can be set according to the actual application situation, and the embodiment of the present application does not make specific limitations on this.

[0085] The magnitude of the charging current is positively correlated with the temperature of the circuit board including the charging chip for charging the battery cell (i.e., the circuit board includes a charging chip, and the charging chip is used to charge the battery cell). That is, the higher the charging current, the higher the temperature of the circuit board; conversely, the lower the charging current, the lower the temperature of the circuit board. It can be seen that when the temperature of the circuit board decreases to equal the first preset temperature, it can also be determined that the charging enters the later stage, and at this time, it is determined that the first time period ends and the second time period begins. Among them, the first preset temperature can be set according to the actual application situation, and the embodiments of the present application do not make specific limitations in this regard.

[0086] Of course, in other embodiments, other methods can also be used to divide the first time period and the second time period, and the embodiments of the present application do not make specific limitations in this regard. For example, a method combining the charging current and the temperature can be used. Another example is to preset the duration of the first time period.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; under the idea of the present application, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other changes in different aspects of the present application as described above. For the sake of brevity, they are not provided in detail; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A charging voltage detection method, characterized in that, For detecting the voltage of a battery cell in an aerosol generating device, the method includes: During the constant voltage charging of the battery cell, controlling the charging current of the battery cell to zero for at least one time period, and detecting the voltage of the battery cell during the time period when the charging current of the battery cell is zero, so as to determine whether the battery cell is fully charged.

2. The charging voltage detection method according to claim 1, wherein During the constant voltage charging of the battery cell, controlling the charging current of the battery cell to zero for at least one time period, and detecting the voltage of the battery cell during the time period when the charging current of the battery cell is zero, includes: During the constant voltage charging of the battery cell, setting N cycles, where N is an integer greater than or equal to 1, and each of the N cycles includes a charging duration for charging the battery cell and a detection duration for controlling the charging current of the battery cell to zero; Detecting the voltage of the battery cell during each of the detection durations.

3. The charging voltage detection method according to claim 2, wherein The charging duration is greater than the detection duration.

4. The charging voltage detection method according to claim 2 or 3, characterized in that During the constant voltage charging of the battery cell, setting N cycles, includes: During the first time period of the constant voltage charging process of the battery cell, setting J first cycles, where J is an integer and 1≤J≤N, the start time of the first time period is the start time of the constant voltage charging of the battery cell, and the duration of each of the J first cycles is greater than a first preset duration.

5. The charging voltage detection method according to claim 4, wherein During the constant voltage charging of the battery cell, setting N cycles, further includes: During the second time period of the constant voltage charging process of the battery cell, setting K second cycles, where K is an integer and 2≤J + K≤N, the start time of the second time period is the end time of the first time period, and the duration of the second cycle is less than the duration of the first cycle.

6. The charging voltage detection method according to claim 5, wherein During the constant voltage charging of the battery cell, setting N cycles, further includes: During the second time period, further setting K of the first cycles and K third cycles, and cyclically setting them in a group of one first cycle, one third cycle and one second cycle, where 4≤J + 3K≤N, the duration of the third cycle is less than the duration of the first cycle and greater than the duration of the second cycle.

7. The charging voltage detection method according to claim 6, wherein The detection duration in the first cycle > the detection duration in the third cycle > the detection duration in the second cycle.

8. The charging voltage detection method according to claim 5, characterized in that The method further includes: Configuring the moment when the charging current of the battery cell is equal to a first preset current as the end moment of the first time period, and / or, configuring the moment when the temperature of the circuit board including the charging chip for charging the battery cell is equal to a first preset temperature as the end moment of the first time period.

9. The charging voltage detection method according to claim 2 or 3, characterized in that, During each of the detection durations, detecting the voltage of the battery cell, includes: Detecting the voltage of the battery cell at the middle moment of each of the detection durations.

10. An aerosol generating device, characterized in that, Includes: A battery cell for supplying power; A charging chip and a controller, the charging chip is electrically connected to the controller and the battery cell respectively, the charging chip is used to charge the battery cell when receiving the enable signal output by the controller, and stop charging the battery cell when not receiving the enable signal; The controller is electrically connected to the battery cell. The controller includes: at least one processor and a memory communicatively connected to the at least one processor. The memory stores instructions executable by the at least one processor. The instructions are executed by the at least one processor so that the at least one processor can execute the method according to any one of claims 1-9.

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