Charging detection circuit and electronic atomization device

Abstract

The utility model provides a charging detection circuit and an electronic atomization device, and belongs to the technical field of electronics. The charging detection circuit comprises a boost module, a micro-control unit, a sampling resistor and a sampling unit. The first end of the boosting module is used for inputting first voltage provided by a first power supply unit in a first device, the second end of the boosting module outputs a branch of second voltage to be connected with the sampling resistor in series, the sampling unit is provided with a first sampling end and a second sampling end which are connected with the two ends of the sampling resistor respectively, and the output end of the sampling unit is connected with the micro-control unit. According to the invention, the effects of reducing the cost of charging detection and improving the reliability and stability of charging detection can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronics, in particular to a charging detection circuit and an electronic atomization device. BACKGROUND

[0002] With the rapid development of electronic technology, some electronic atomization devices capable of dispersing stored liquid into small droplets have also been widely popularized. These electronic atomization devices generally include an atomization cartridge for storing atomization liquid and a host for atomization control.

[0003] In the related art, generally, due to the large capacity of the battery in the host, when the atomization cartridge is connected to the host, the battery in the atomization cartridge can be charged by the host. In order to prevent overcharging of the battery in the atomization cartridge, a corresponding detection circuit needs to be provided in the atomization cartridge to detect whether the battery in the atomization cartridge is fully charged.

[0004] However, this scheme has the problems of high cost and poor stability. Utility model content

[0005] The purpose of the present application is to provide a charging detection circuit and an electronic atomization device, which can reduce the cost of charging detection and improve the reliability and stability of charging detection.

[0006] Embodiments of the present application are implemented as follows:

[0007] In a first aspect, the present application provides a charging detection circuit applied to a first device of an electronic atomization device, wherein the first device comprises a first power supply unit, and the charging detection circuit comprises a boost module, a micro control unit, a sampling resistor and a sampling unit.

[0008] A first end of the boost module is configured to input a first voltage provided by the first power supply unit, the boost module boosts the first voltage to a second voltage, and a second end of the boost module outputs the second voltage to a second power supply unit of a second device outside.

[0009] A branch outputting the second voltage of the second end of the boost module is connected in series with the sampling resistor, and the sampling unit has a first sampling end and a second sampling end connected to two ends of the sampling resistor respectively to collect a sampling voltage at the two ends of the sampling resistor.

[0010] An output end of the sampling unit is connected to the micro control unit, and the micro control unit determines a charging current of the second power supply unit of the connected second device based on the sampling voltage and a resistance value of the sampling resistor.

[0011] The second device is used for atomization under the control of the first device or under the action of a detection signal of a sensor in the second device.

[0012] In the application, the second end of the boost module is connected with the first end of the sampling resistor and the first sampling end of the sampling unit respectively.

[0013] The second end of the sampling resistor is used for connecting a second power supply unit of an external second device.

[0014] In the application, the boost module comprises an inductor and a boost unit.

[0015] The first end of the inductor is connected with the power supply end of the boost unit, the second end of the inductor is connected with the control end of the boost unit, and the first end of the inductor is used for inputting the first voltage.

[0016] The enable end of the boost unit is connected with the first end of the micro control unit, and the output end of the boost unit is connected with the first end of the sampling resistor.

[0017] The boost unit and the inductor are used for boosting the first voltage to the second voltage and outputting the second voltage to the sampling resistor.

[0018] In the application, the charging detection circuit further comprises a feedback unit.

[0019] The first end of the feedback unit is connected with the output end of the boost unit and the first end of the sampling resistor respectively, and the second end of the feedback unit is connected with the feedback end of the boost unit.

[0020] The feedback unit is used for collecting the second voltage and outputting the collected voltage to the boost unit, and the boost unit is used for adjusting the second voltage based on the collected voltage.

[0021] In the application, the feedback unit comprises a first resistor and a second resistor.

[0022] The first end of the first resistor is connected with the output end of the boost unit and the first end of the sampling resistor respectively, and the second end of the first resistor is connected with the first end of the second resistor and the feedback end of the boost unit respectively.

[0023] The second end of the second resistor is grounded.

[0024] In the application, the sampling unit comprises a first collection branch and a second collection branch.

[0025] The first end of the first acquisition branch is connected with the first end of the sampling resistor, and the second end of the first acquisition branch is connected with the first acquisition end of the micro control unit.

[0026] The first end of the second acquisition branch is connected with the second end of the sampling resistor, and the second end of the second acquisition branch is connected with the second acquisition end of the micro control unit.

[0027] In the present application, the first acquisition branch comprises a third resistor and a fourth resistor.

[0028] The first end of the third resistor is connected with the first end of the sampling resistor, and the second end of the third resistor is connected with the first end of the fourth resistor and the first acquisition end of the micro control unit respectively.

[0029] The second end of the fourth resistor is grounded.

[0030] In the present application, the second acquisition branch comprises a fifth resistor and a sixth resistor.

[0031] The first end of the fifth resistor is connected with the second end of the sampling resistor, and the second end of the fifth resistor is connected with the first end of the sixth resistor and the second acquisition end of the micro control unit respectively.

[0032] The second end of the sixth resistor is grounded.

[0033] The second aspect of the embodiment of the present application provides an electronic atomization device, the electronic atomization device comprises a first device and a second device, the first device is detachably connected with the second device, and the first device at least comprises any of the charging detection circuits in the first aspect.

[0034] The first device is further provided with a first power supply unit and an airflow sensor, and the first power supply unit is electrically connected with the airflow sensor.

[0035] The second device is provided with a second power supply unit and an atomization core, and the second power supply unit is electrically connected with the atomization core.

[0036] The first power supply unit and the second power supply unit are selectively electrically connected via the charging detection circuit, and the atomization core is powered by the first power supply unit and the second power supply unit in response to the detection of the airflow sensor.

[0037] The third aspect of the embodiment of the present application provides an electronic atomization device, the electronic atomization device comprises a first device and a second device, the first device is detachably connected with the second device, and the first device at least comprises any of the charging detection circuits in the first aspect, and the first device is provided with a first power supply unit.

[0038] The second device is provided with a second power supply unit, an atomization core and an airflow sensor, and the second power supply unit is electrically connected with the atomization core and the airflow sensor;

[0039] The first power supply unit and the second power supply unit are selectively electrically connected via the charging detection circuit, and the atomization core is powered by the second power supply unit in response to the detection of the airflow sensor.

[0040] The beneficial effects of the embodiments of the present application include:

[0041] The charging detection circuit provided by the embodiments of the present application is arranged in the first device of the electronic atomization device, and specifically, the first end of the boost module is used to input the first voltage provided by the first power supply unit in the first device, the second end of the boost module outputs a branch of the second voltage in series with the sampling resistor, the sampling unit has a first sampling end and a second sampling end, which are respectively connected to the two ends of the sampling resistor, and the output end of the sampling unit is connected to the micro control unit.

[0042] The boost module boosts the first voltage to the second voltage, and the second end of the boost module outputs the second voltage to the second power supply unit (for example, a battery) of the second device outside, so as to achieve the purpose of charging the second power supply unit in the second device.

[0043] Moreover, the sampling unit can collect the sampling voltage at the two ends of the sampling resistor during the charging of the second device by the first device, output the collected voltage to the micro control unit, and then determine the charging current of the second power supply unit of the second device based on the sampling voltage and the resistance value of the sampling resistor, so as to estimate the approximate power of the second power supply unit in the second device and / or accurately judge whether the second power supply unit of the second device is fully charged. In this way, effective charging detection assistance can be provided.

[0044] Moreover, the charging detection circuit provided by the embodiments of the present application is arranged in the first device of the electronic atomization device, and the first device has a larger volume and space compared with the second device, which facilitates the arrangement of the charging detection circuit. Moreover, when the charging detection circuit detects whether the second power supply unit in the second device is fully charged or the power data, it does not need to be sent to the first device by the second device, that is, a communication interface does not need to be additionally arranged between the first device and the second device.

[0045] In this way, the cost of charging detection can be reduced, and the reliability and stability of charging detection can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as limiting the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0047] Figure 1 The structural schematic diagram of the first charging detection circuit provided by the embodiments of the present application;

[0048] Figure 2 The structural schematic diagram of the second charging detection circuit provided by the embodiments of the present application;

[0049] Figure 3 The structural schematic diagram of the third charging detection circuit provided by the embodiments of the present application;

[0050] Figure 4 The structural schematic diagram of the fourth charging detection circuit provided by the embodiments of the present application;

[0051] Figure 5 The structural schematic diagram of the fifth charging detection circuit provided by the embodiments of the present application;

[0052] Figure 6 The structural schematic diagram of the sixth charging detection circuit provided by the embodiments of the present application;

[0053] Figure 7 The structural schematic diagram of an electronic atomization device provided by the embodiments of the present application. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0055] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the present application.

[0056] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0057] In the description of the present application, it should be noted that the terms "first", "second", "third" and the like are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0058] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] In the related art, generally, due to the large capacity of the battery in the host, when the atomizing bullet is connected with the host, the battery in the atomizing bullet can be charged by the host. In order to prevent the battery in the atomizing bullet from overcharging, a corresponding voltage or current detection circuit needs to be set in the atomizing bullet to detect the battery voltage and other data of the atomizing bullet, and the detected data is sent to the host for processing.

[0060] However, due to the small size and internal space of the atomizing bullet, it is difficult and costly to set a detection circuit in the atomizing bullet. Moreover, in the case of setting a detection circuit in the atomizing bullet to detect whether the battery is fully charged, the atomizing bullet needs to send the detection data to the host, so it is necessary to increase a communication interface in the atomizing bullet and the host respectively for real-time transmission of the battery voltage and other data detected by the atomizing bullet to the host. It can be seen that this not only increases the cost, but also may cause the host to fail to correctly identify or receive the corresponding data due to the communication interface failure.

[0061] Therefore, the related art solution has the problems of high cost and poor stability.

[0062] Therefore, the present application provides a charging detection circuit, which sets a boost module, a microcontroller unit (MCU), a sampling resistor and a sampling unit in the charging detection circuit, and the first end of the boost module is used to input a first voltage provided by a first power supply unit in a first device, the second end of the boost module outputs a branch of a second voltage in series with the sampling resistor, the sampling unit has a first sampling end and a second sampling end, which are connected to both ends of the sampling resistor respectively, and the output end of the sampling unit is connected to the microcontroller unit. In this way, the effect of reducing the cost of charging detection, improving the reliability and stability of charging detection can be achieved.

[0063] The embodiment of the present application takes the charging detection circuit of the first device applied in the electronic atomization device as an example for illustration. But it does not mean that the embodiment of the present application can only be applied in the electronic atomization device or the charging detection of the first device.

[0064] In the embodiment of the present application, the first device can refer to the host in the electronic atomization device. The electronic atomization device can also include a second device, which can refer to the atomization cartridge in the electronic atomization device.

[0065] Specifically, the first device and the second device are respectively provided with a battery. Moreover, the battery in the first device can charge the battery in the second device, and the first device can also have any possible function of storing atomization data, atomization control, etc.

[0066] Among them, the battery in the first device can be used as the first power supply unit in the first device, and the battery in the second device can be used as the second power supply unit in the second device. Moreover, the first power supply unit and the second power supply unit can also include any possible charging circuit or charging switch in addition to the battery to realize the corresponding function of power supply control.

[0067] In addition, the first device and the second device can also respectively include other any possible elements, which are not limited in the embodiment of the present application.

[0068] The charging detection circuit provided by the embodiment of the present application will be explained and described in detail below.

[0069] Figure 1 The structure diagram of a charging detection circuit provided by the present application. Referring to Figure 1 The embodiment of the present application provides a charging detection circuit, which is applied to a first device 100, and the first device 100 can be the host in the above-mentioned electronic atomization device.

[0070] The charging detection circuit includes a boost module 101, an MCU 102, a sampling resistor Rs and a sampling unit 103.

[0071] The first end of the boost module 101 is used to input the first voltage provided by the first power supply unit in the first device 100, the enable end of the boost module 101 is connected with the first end of the MCU 102, and the second end of the boost module 101 is respectively connected with the first end of the sampling resistor Rs and the first sampling end of the sampling unit 103.

[0072] The second end of the sampling resistor Rs is respectively used to connect the external second device 200 and the second sampling end of the sampling unit 103. The output ends of the sampling unit 103 are respectively connected with the collection ends of the MCU 102.

[0073] In this embodiment, the first voltage ( Figure 1 The first voltage (B+) shown can be provided by a first power supply unit (not shown) in the first device 100. For example, the first voltage can be output by a battery in the first device 100. In this case, the first terminal of the boost module 101 can be connected to the positive terminal of the battery in the first power supply unit. The first voltage can also be output by a charging circuit or charging switch in the first power supply unit. In this case, the first terminal of the boost module 101 can be connected to the output terminal of the charging circuit or charging switch in the first power supply unit, and the input terminal of the charging circuit or charging switch can be connected to the positive terminal of the battery in the first power supply unit.

[0074] Furthermore, the first voltage can be any possible voltage level, such as 3.3V or other voltage levels. This application does not limit this.

[0075] The boost module 101 is used to boost the first voltage and output the second voltage to the sampling resistor Rs.

[0076] In this embodiment, the boost module 101 can boost the first voltage from 3.3V to 5V, or any other possible voltage level. This application embodiment does not limit this.

[0077] Specifically, the second end of the sampling resistor Rs is connected through... Figure 1 The P+ terminal is connected to the positive terminal of the battery in the second device 200.

[0078] In this embodiment, the sampling resistor Rs can be any high-precision resistor, and the resistance value of the sampling resistor Rs can be relatively small. For example, a resistor with a resistance value between 0.01 and 1 Ω can be selected as the sampling resistor Rs. In this way, the voltage drop caused by the sampling resistor Rs can be minimized, thereby reducing the impact of the sampling resistor Rs on the voltage output from the first device 100 to the second device 200.

[0079] Furthermore, the first and second ends of the sampling resistor Rs can be connected to other units or components via pads, which is not limited in this embodiment.

[0080] The sampling unit 103 is used to collect the sampling voltage across the sampling resistor Rs.

[0081] In this embodiment, the sampling unit 103 can be any device capable of acquiring voltage. For example, the sampling unit 103 may include any possible components such as a resistor for voltage division or an operational amplifier. This application embodiment does not limit this.

[0082] The sampling voltage refers to the voltage difference between the first and second terminals of the sampling resistor Rs.

[0083] The MCU 102 is configured to determine a charging current of a second power supply unit (not shown in the figure) of the second device 200 based on the sampling voltage and the resistance value of the sampling resistor Rs.

[0084] The MCU 102 is configured to control the start and stop of the boost module 101. Specifically, the MCU 102 pulls the enable end of the boost module 101 high to start the boost module 101, and the boost module 101 works. The MCU 102 pulls the enable end of the boost module 101 low to stop the boost module 101, and the boost module 101 stops working.

[0085] The MCU 102 can have the functions of detection, identification, calculation, processing, control, etc.

[0086] In this embodiment, the charging current is the current output by the first device 100 to the second power supply unit or the battery in the second device 200. The present embodiment is not limited in this regard.

[0087] Specifically, the MCU 102 can specifically determine the charging current based on Ohm's law, for example, the charging current is denoted as I, the sampling voltage is denoted as U, and the resistance value of the sampling resistor Rs is denoted as R, then I = U / R. In this way, the charging current can be obtained simply and quickly.

[0088] It can be understood that, generally, during the battery charging process, the charging current gradually decreases as the battery charge increases. For example, in the case of a fully charged battery, the charging current will decrease to 0A. Therefore, when the MCU 102 determines that the charging current is 0A, it can be determined that the first device 100 has completed charging the battery in the second device 200, and then the MCU 102 can turn off the charging circuit and / or the charging switch in the first device 100, so that the first power supply unit stops supplying power, thereby improving the safety of the first device 100 charging.

[0089] In addition, when the first device 100 charges the battery in the second device 200, the size of the charging current is related to not only the battery charge in the second device 200, but also the parameters of the battery in the second device 200. For example, if the rated voltage of the battery is 3.3V, the charging current may be 0.5A when the battery charge is 80%; if the rated voltage of the battery is 2.5V, the charging current may be 0.4A when the battery charge is 80%.

[0090] Then, the MCU 102 can further estimate the battery charge in the second device 200 in combination with the parameters of the battery in the second device 200 (including but not limited to charging performance data) and the size of the charging current. The present embodiment is not limited in this regard.

[0091] Specifically, the first device 100 can specifically charge the battery in the second device 200 in the case that the first device 100 and the second device 200 are connected or merged, and the embodiments of the present application do not limit this.

[0092] In the embodiment, the second device 200 can realize the atomization function by any possible way, such as by heating and pressurizing the atomized liquid, or by generating ultrasonic waves to realize atomization, and the embodiments of the present application do not limit this.

[0093] Among them, the second device 200 is used for atomization under the control of the first device 100, or atomization under the action of the detection signal of the sensor in the second device 200.

[0094] For example, if the second device 200 is only provided with the second power supply unit (i.e. the battery) and the corresponding atomization core, and is not provided with a sensor (such as an air flow sensor) for detecting whether atomization is needed, then the second device 200 can be used for atomization under the control of the first device 100. In this case, the first device 100 needs to be provided with a corresponding sensor, so that the MCU 102 or other processing unit in the first device 100 determines whether atomization is needed at present according to the detection signal output by the sensor, and outputs a corresponding control signal to the second power supply unit and / or the atomization core in the second device to control the second device 200 to atomize when it is determined that atomization is needed.

[0095] Or, if the second device 200 is only provided with the second power supply unit (i.e. the battery), the atomization core and the sensor for detecting whether atomization is needed, then the second device 200 can atomize under the action of the detection signal of the sensor in the second device 200. In this case, the sensor in the second device 200 can output a corresponding detection signal according to the detection condition, and the processing unit in the second device 200 determines whether atomization is needed at present according to the detection signal output by the sensor, and outputs a corresponding control signal to the second power supply unit and / or the atomization core in the second device 200 to control the second device 200 to atomize when it is determined that atomization is needed.

[0096] It is worth noting that in order to better explain the charging detection circuit provided by the embodiments of the present application, the working principle of the charging detection circuit will be briefly introduced below taking the first voltage as 3.3V and the second voltage as 5V as an example:

[0097] In the case that the battery in the second device 200 is not fully charged and the first device 100 charges the second device 200, the first voltage of 3.3V is boosted to a second voltage of 5V by the boost module 101, and the second voltage (5V voltage) is output to the sampling resistor Rs, and then output to the battery in the second device 200 through the sampling resistor Rs. At the same time, the sampling unit 103 collects the sampling voltage across the sampling resistor Rs and outputs it to the MCU 102, at this time, the charging current calculated by the MCU 102 based on Ohm's law is not 0. The MCU 102 can determine that the battery in the second device 200 is not fully charged.

[0098] As the battery in the second device 200 gradually increases in power, the voltage at the P+ end also gradually increases, causing the sampling voltage across the sampling resistor Rs to gradually decrease. During this process, since the resistance of the sampling resistor Rs does not change, the charging current calculated by the MCU 102 gradually decreases.

[0099] In the case that the battery in the second device 200 is fully charged (power is 100%), the sampling voltage across the sampling resistor Rs is almost 0V, so the charging current calculated by the MCU 102 is also 0A. At this time, the MCU 102 can determine that the battery in the second device 200 is fully charged, so that the MCU 102 closes the charging circuit and / or the charging switch in the first device 100, so that the first device 100 stops charging the battery in the second device 200, to improve the safety of charging.

[0100] In the embodiment of the present application, by arranging the charging detection circuit including the boost module 101, the MCU 102, the sampling resistor Rs and the sampling unit 103 in the first device 100 of the electronic atomization device, specifically, the branch outputting the second voltage at the second end of the boost module 101 is connected in series with the sampling resistor Rs, the sampling unit 103 has a first sampling end and a second sampling end, which are connected to the two ends of the sampling resistor Rs respectively, and the output end of the sampling unit 103 is connected to the micro control unit 102.

[0101] The boost module 101 boosts the first voltage to the second voltage, and the second end of the boost module 101 outputs the second voltage to the second power supply unit (such as a battery) of the second device 200 outside, to achieve the purpose of charging the second power supply unit in the second device 200.

[0102] And, the sampling unit 103 can collect the sampling voltage across the sampling resistor Rs during the first device 100 charging the second device 200, and output the collected voltage to the MCU 102, and then the MCU 102 determines the charging current of the second power supply unit of the second device 200 based on the sampling voltage and the resistance of the sampling resistor Rs, and further can estimate the approximate power of the second power supply unit in the second device 200, and / or accurately judge whether the second power supply unit of the second device 200 is fully charged. In this way, effective charging detection assistance can be provided.

[0103] Moreover, the charging detection circuit provided in the embodiment of the present application is arranged in the first device 100 of the electronic atomization device, and the first device 100 has a larger volume and space compared with the second device 200, which facilitates the arrangement of the charging detection circuit. Moreover, when the charging detection circuit detects the data such as whether the second power supply unit in the second device 200 is fully charged or the power, it is not necessary to send the data to the first device 100 by the second device 200, that is, it is not necessary to additionally arrange a communication interface between the first device 100 and the second device 200.

[0104] In this way, the effect of reducing the cost of charging detection and improving the reliability and stability of charging detection can be achieved.

[0105] In a possible implementation manner, referring to Figure 2 The boost module 101 comprises an inductor and a boost unit.

[0106] The first end of the inductor L is connected with the power supply end (VIN) of the boost unit U0, the second end of the inductor L is connected with the control end (SW) of the boost unit U0, and the first end of the inductor L is used for inputting the first voltage.

[0107] The enable end (EN) of the boost unit U0 is connected with the first end of the MCU 102, the output end (VOUT) of the boost unit U0 is connected with the first end of the sampling resistor Rs, and the ground end (GND) of the boost unit U0 is grounded.

[0108] The boost unit U0 and the inductor L are used for boosting the first voltage and outputting the second voltage to the sampling resistor Rs.

[0109] In the embodiment, the inductor L can be used as an energy storage device to stabilize the voltage output by the boost unit U0.

[0110] In the embodiment, the boost unit U0 can be any possible boost IC.

[0111] The MCU 102 is configured to control the start and stop of the boost unit U0. Specifically, the MCU 102 pulls the enable end of the boost unit U0 high to start the boost unit U0, and the boost unit U0 works. The MCU 102 pulls the enable end of the boost unit U0 low to stop the boost unit U0, and the boost unit U0 stops working.

[0112] In a possible manner, the boost module 101 or the first device 100 can further include a diode and an output capacitor for energy storage and discharge in cooperation with the inductor L. The embodiments of the present application do not limit the same.

[0113] It is worth noting that the inductor L has the function of energy storage. When the input first voltage passes through the inductor L, the inductor L generates a magnetic field, which stores energy. When the first voltage changes, the magnetic field in the inductor L also changes, thereby generating an induced electromotive force, so that the voltage output by the boost unit U0 is increased. In addition, the inductor L can also have the functions of regulating current and filtering, thereby ensuring the stability of the voltage output by the boost unit U0.

[0114] In this way, the inductor L and the boost unit U0 can achieve the purpose of boosting the first voltage.

[0115] In a possible implementation manner, referring to Figure 2 The charging detection circuit further includes a feedback unit 104.

[0116] The first end of the feedback unit 104 is connected to the output end of the boost unit U0 and the first end of the sampling resistor Rs respectively, and the second end of the feedback unit 104 is connected to the feedback end (FB) of the boost unit U0.

[0117] The feedback unit 104 is configured to collect the second voltage and output the collected voltage to the boost unit U0.

[0118] Specifically, the feedback unit 104 can collect the second voltage in any possible manner, such as through a voltage dividing resistor or an operational amplifier, and the embodiments of the present application do not limit the same.

[0119] In the embodiment, the boost unit U0 is configured to adjust the second voltage based on the collected voltage.

[0120] Specifically, the boost unit U0 can adjust the voltage level of the output voltage (i.e., the second voltage) based on the collected voltage, so that the adjusted electric energy is maintained at the voltage level required by the second device 200 or a preset voltage level (such as 5V) as much as possible.

[0121] Exemplarily, the voltage boosting unit U0 can compare the collected voltage with a preset voltage, and when the collected voltage is greater than the preset voltage, the voltage boosting unit U0 can reduce the voltage level of the output voltage thereof; when the collected voltage is less than the preset voltage, the voltage boosting unit U0 can increase the voltage level of the output voltage thereof; and when the collected voltage is equal to the preset voltage, the voltage boosting unit U0 can maintain the voltage level of the output voltage thereof.

[0122] The preset voltage can be a voltage level required by the second device 200 or a preset voltage level.

[0123] For example, on the basis of the above, continuing to refer to Figure 2 , the feedback unit 104 comprises a first resistor R1 and a second resistor R2. Figure 3 The first end of the first resistor R1 is connected with the output end (VOUT) of the voltage boosting unit U0 and the first end of the sampling resistor Rs respectively, and the second end of the first resistor R1 is connected with the first end of the second resistor R2 and the feedback end (FB) of the voltage boosting unit U0 respectively.

[0124] The second end of the second resistor R2 is grounded.

[0125] In the embodiment, the first resistor R1 and the second resistor R2 can be resistors for voltage division, and the specific resistance value can be selected according to actual needs.

[0126] That is, the collected voltage is obtained by dividing the second voltage by the first resistor R1 and the second resistor R2.

[0127] In this way, the feedback adjustment of the voltage boosting module 101 and the voltage boosting unit U0 can be realized, so as to improve the stability of the second voltage output by the voltage boosting module 101 and the voltage boosting unit U0.

[0128] In a possible implementation manner, referring to

[0129] The sampling unit 103 comprises a first sampling branch 1031 and a second sampling branch 1032. Figure 4 The first end of the first sampling branch 1031 is connected with the first end of the sampling resistor Rs, and the second end of the first sampling branch 1031 is connected with the first sampling end of the MCU 102.

[0130] The first end of the second sampling branch 1032 is connected with the second end of the sampling resistor Rs, and the second end of the second sampling branch 1032 is connected with the second sampling end of the MCU 102.

[0131] The first end of the second sampling branch 1032 is connected with the second end of the sampling resistor Rs, and the second end of the second sampling branch 1032 is connected with the second sampling end of the MCU 102.

[0132] The first acquisition branch 1031 is configured to acquire the voltage at the first end of the sampling resistor Rs and send the voltage at the first end of the sampling resistor Rs to the MCU 102.

[0133] The second acquisition branch 1032 is configured to acquire the voltage at the second end of the sampling resistor Rs and send the voltage at the second end of the sampling resistor Rs to the MCU 102.

[0134] In this embodiment, after receiving the voltage sent by the first acquisition branch 1031 and the voltage sent by the second acquisition branch 1032 respectively, the MCU 102 can take the difference between the voltage sent by the first acquisition branch 1031 and the voltage sent by the second acquisition branch 1032 as the sampling voltage.

[0135] In a possible implementation, referring to Figure 5 , the first acquisition branch 1031 includes a third resistor R3 and a fourth resistor R4.

[0136] The first end of the third resistor R3 is connected with the first end of the sampling resistor Rs, and the second end of the third resistor R3 is connected with the first end of the fourth resistor R4 and the first acquisition end of the MCU 102 respectively.

[0137] The second end of the fourth resistor R4 is grounded.

[0138] In this embodiment, the third resistor R3 and the fourth resistor R4 can be resistors for voltage division, and the specific resistance value can be selected according to actual needs.

[0139] That is, the first acquisition branch 1031 acquires the voltage at the first end of the sampling resistor Rs obtained by voltage division of the first resistor R1 and the second resistor R2.

[0140] Continuing to refer to Figure 5 , the second acquisition branch 1032 includes a fifth resistor R5 and a sixth resistor R6.

[0141] The first end of the fifth resistor R5 is connected with the second end of the sampling resistor Rs, and the second end of the fifth resistor R5 is connected with the first end of the sixth resistor R6 and the second acquisition end of the MCU 102 respectively.

[0142] The second end of the sixth resistor R6 is grounded.

[0143] In this embodiment, the fifth resistor R5 and the sixth resistor R6 can be resistors for voltage division, and the specific resistance value can be selected according to actual needs.

[0144] That is, the second acquisition branch 1032 acquires the voltage at the second end of the sampling resistor Rs obtained by voltage division of the fifth resistor R5 and the sixth resistor R6.

[0145] Generally, the resistance of the fifth resistor R5 can be equal to the resistance of the third resistor R3, and the resistance of the sixth resistor R6 can be equal to the resistance of the fourth resistor R4. In this way, the difference between the first sampling branch 1031 and the second sampling branch 1032 can be eliminated, so as to minimize the error of the sampling voltage.

[0146] In this way, the sampling voltage can be accurately obtained, so that the MCU 102 can accurately determine the charging current and / or the state of charge of the battery in the second device 200 based on the sampling resistor.

[0147] In one possible implementation, referring to Figure 6 The charging detection circuit further includes a first capacitor C1 and a second capacitor C2.

[0148] The first plate of the first capacitor C1 is connected to the first end of the sampling resistor Rs, and the second plate of the first capacitor C1 is grounded.

[0149] The first plate of the second capacitor C2 is connected to the first end of the boost module 101, and the second plate of the second capacitor C2 is grounded.

[0150] In the embodiment, the capacitance of the first capacitor C1 and the second capacitor C2 can be selected according to actual needs, which is not limited in the embodiment.

[0151] In the embodiment, the first capacitor C1 and the second capacitor C2 can be used as filter capacitors, the first capacitor C1 can improve the stability of the second voltage, and the second capacitor C2 can improve the stability of the first voltage.

[0152] In this way, the stability of the charging detection circuit can be improved.

[0153] The following describes an electronic atomization device including the charging detection circuit provided in the application. For details of the implementation process and technical effects, refer to the above description, which will not be repeated here.

[0154] Figure 7 FIG. 1 is a structural schematic diagram of an electronic atomization device provided in an embodiment of the application. Referring to Figure 7 The electronic atomization device A includes a first device 100 and a second device 200, the first device 100 is detachably connected to the second device 200, and the first device 100 includes the charging detection circuit provided in any of the above embodiments.

[0155] In one possible embodiment, the first device 100 further includes a first power supply unit, the second device 200 includes a second power supply unit, an atomization core, and an airflow sensor, and the second power supply unit is electrically connected to the atomization core and the airflow sensor.

[0156] The first power supply unit and the second power supply unit are selectively electrically connected via the charging detection circuit.

[0157] The atomization core can be powered by the second power supply unit in response to the detection of the airflow sensor.

[0158] It can be understood that the atomization core can be any possible device such as a heating wire, a pressurizing device, etc. to atomize the atomized liquid by heating, pressurizing, etc. The airflow sensor can output a corresponding detection signal to the processing unit in the second device 200 when detecting a change in the gas flow rate, and the processing unit in the second device 200 controls the second power supply unit to supply power to the atomization core. It can be seen that in this case, the second device 200 can also be provided with a corresponding processing unit, which is not limited by the embodiments of the present application.

[0159] In this way, in the case that the second device 200 itself has a battery, an atomization core, a sensor and a processing unit, etc., the second device 200 can be atomized based on the detection of the gas sensor inside the second device 200 and controlled by the control unit inside the second device 200.

[0160] In the present embodiment, continuing to refer to Figure 7 The first device 100 can further include a shielding cover Z, which can be used to shield the influence of signals outside the first device 100 on the charging detection circuit.

[0161] Specifically, the first device 100 can further include a first battery, a charging circuit and / or a charging switch.

[0162] The first battery can refer to the battery in the first power supply in the first device 100 in the above embodiments, which is used to provide the first voltage.

[0163] The charging circuit and / or the charging switch can be connected between the positive electrode of the first battery and the first end of the boost module 101 in the charging detection circuit, for turning on or turning off the transmission path of the first battery outputting the first voltage to the boost module 101.

[0164] In the present embodiment, the second device 200 can include a second battery, an atomization device and a containing bin.

[0165] The second battery can refer to the battery in the second power supply in the second device 200 in the above embodiments, which is used to be charged under the action of the second voltage output by the first device 100 and to supply power to the atomization device or other elements in the second device 200.

[0166] The containing bin can be used to store atomized liquid.

[0167] It can be understood that the first device 100 and the second device 200 can further include a memory and other any possible components, respectively, so that the first device 100, the second device 200 and the electronic atomization device A realize corresponding functions. The embodiments of the present application do not limit this.

[0168] In another possible implementation, the first device 100 is further provided with a first power supply unit and an airflow sensor, the first power supply unit being electrically connected with the airflow sensor; the second device 200 is provided with a second power supply unit and an atomization core, the second power supply unit being electrically connected with the atomization core.

[0169] The first power supply unit and the second power supply unit are selectively electrically connected via the charging detection circuit.

[0170] The atomization core can be powered by the second power supply unit in response to the detection of the airflow sensor.

[0171] It can be understood that in the case that the second device 200 includes the second power supply unit and the atomization core but does not include the airflow sensor, the MCU 102 in the first device 100 can output a corresponding detection signal to the MCU 102 in the first device 100 when the airflow sensor in the first device 100 detects that the gas flow rate changes, and the MCU 102 controls the second power supply unit to power the atomization core.

[0172] In this way, the second device 200 can be controlled by the first device 100 to perform atomization in the case that the second device 200 itself only has a battery, an atomization core and the like but does not have a sensor and / or a processing unit.

[0173] As can be seen from the above, in the electronic atomization device provided in the embodiments, the second device 200 can realize the atomization function in the following two ways: one is that the airflow sensor in the first device 100 detects to determine whether atomization is needed, and the first device 100 controls the second power supply unit in the second device 200 to power the atomization core; the other is that the airflow sensor in the second device 200 detects to determine whether atomization is needed, and then the processing unit in the second device 200 controls the second power supply unit in the second device 200 to power the atomization core. The embodiments of the present application do not limit this.

[0174] The electronic atomization device A described above includes the charging detection circuit provided in the foregoing embodiments, that is, the electronic atomization device A and the charging detection circuit belong to the same design concept, and their implementation principles and technical effects are similar, which will not be repeated here.

[0175] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0176] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A charge detection circuit, characterized by, A first device applied to an electronic atomization device, the first device comprising a first power supply unit, the charging detection circuit comprising: a boost module, a micro control unit, a sampling resistor and a sampling unit; a first end of the boost module is used for inputting a first voltage provided by the first power supply unit, the boost module boosts the first voltage to a second voltage, and a second end of the boost module outputs the second voltage to a second power supply unit of a second device outside; a branch outputting the second voltage of the second end of the boost module is connected in series with the sampling resistor, the sampling unit has a first sampling end and a second sampling end, respectively connected to two ends of the sampling resistor, and collects a sampling voltage at the two ends of the sampling resistor; an output end of the sampling unit is connected to the micro control unit, and the micro control unit determines a charging current of the second power supply unit of the connected second device based on the sampling voltage and a resistance value of the sampling resistor; wherein the second device is used for atomization under the control of the first device or under the action of a detection signal of a sensor in the second device.

2. The charge detection circuit of claim 1, wherein, The second end of the boost module is connected with the first end of the sampling resistor and the first sampling end of the sampling unit respectively; the second end of the sampling resistor is used for connecting the second power supply unit of the second device outside.

3. The charge detection circuit of claim 2, wherein, The boost module comprises an inductor and a boost unit; a first end of the inductor is connected with a power supply end of the boost unit, a second end of the inductor is connected with a control end of the boost unit, and the first end of the inductor is used for inputting the first voltage; an enable end of the boost unit is connected with a first end of the micro control unit, and an output end of the boost unit is connected with a first end of the sampling resistor; wherein the boost unit and the inductor are used for boosting the first voltage to the second voltage and outputting the second voltage to the sampling resistor.

4. The charge detection circuit of claim 3, wherein, The charging detection circuit further comprises a feedback unit; a first end of the feedback unit is connected with the output end of the boost unit and the first end of the sampling resistor respectively, and a second end of the feedback unit is connected with a feedback end of the boost unit; wherein the feedback unit is used for collecting the second voltage and outputting the collected voltage to the boost unit; and the boost unit is used for adjusting the second voltage based on the collected voltage.

5. The charge detection circuit of claim 4, wherein, The feedback unit comprises a first resistor and a second resistor; a first end of the first resistor is connected with the output end of the boost unit and the first end of the sampling resistor respectively, and a second end of the first resistor is connected with a first end of the second resistor and the feedback end of the boost unit respectively; a second end of the second resistor is grounded.

6. The charge detection circuit of claim 1, wherein, The sampling unit comprises a first collection branch and a second collection branch; a first end of the first collection branch is connected with the first end of the sampling resistor, and a second end of the first collection branch is connected with a first collection end of the micro control unit; a first end of the second collection branch is connected with the second end of the sampling resistor, and a second end of the second collection branch is connected with a second collection end of the micro control unit.

7. The charge detection circuit of claim 6, wherein, The first acquisition branch comprises a third resistor and a fourth resistor; The first end of the third resistor is connected with the first end of the sampling resistor, and the second end of the third resistor is connected with the first end of the fourth resistor and the first acquisition end of the micro control unit respectively; The second end of the fourth resistor is grounded.

8. The charge detection circuit of claim 6, wherein, The second acquisition branch comprises a fifth resistor and a sixth resistor; The first end of the fifth resistor is connected with the second end of the sampling resistor, and the second end of the fifth resistor is connected with the first end of the sixth resistor and the second acquisition end of the micro control unit respectively; The second end of the sixth resistor is grounded.

9. An electronic atomizing device, characterized by, The electronic atomization device comprises a first device and a second device, the first device is detachably connected with the second device, and the first device at least comprises the charging detection circuit in any one of claims 1 to 8, and the first device further comprises a first power supply unit and an airflow sensor, and the first power supply unit is electrically connected with the airflow sensor; The second device comprises a second power supply unit and an atomization core, and the second power supply unit is electrically connected with the atomization core; The first power supply unit and the second power supply unit are selectively electrically connected via the charging detection circuit, and the atomization core is powered by the second power supply unit in response to the detection of the airflow sensor.

10. An electronic atomizing device, characterized by, The electronic atomization device comprises a first device and a second device, the first device is detachably connected with the second device, and the first device at least comprises the charging detection circuit in any one of claims 1 to 8, and the first device further comprises a first power supply unit and an airflow sensor, and the first power supply unit is electrically connected with the airflow sensor; The second device comprises a second power supply unit, an atomization core and an airflow sensor, and the second power supply unit is electrically connected with the atomization core and the airflow sensor; The first power supply unit and the second power supply unit are selectively electrically connected via the charging detection circuit, and the atomization core is powered by the second power supply unit in response to the detection of the airflow sensor.

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