Power supply working circuit and electronic atomization terminal

Abstract

The present application discloses a power supply working circuit and an electronic atomization terminal, wherein the power supply working circuit includes a connecting unit, a line switch unit, a monitoring unit and a switch tube; the connecting unit can switchably connect the load and the charging interface; the connecting unit and the line switch unit are used to guide the monitoring unit to enter the charging mode or the power supply mode through a switch; when the connecting unit is connected to the load, the connecting unit, the line switch unit and the monitoring unit are connected to form a closed loop for supplying power to the load; the monitoring unit is used to turn on the switch tube after switching to the power supply mode; when the connecting unit is connected to the charging interface, the connecting unit, the line switch unit and the monitoring unit are connected to form a closed loop for charging the monitoring unit; the monitoring unit is used to turn on the switch tube after switching to the charging mode; the line switch unit is used to stop the working power supply from supplying power to the load and prevent the monitoring unit from automatically resuming power supply to the load by blowing a fuse when all switch branches are connected.

Description

Technical Field

[0001] The present application relates to the technical field of power supply operation, specifically to a power supply operation circuit and an electronic atomization terminal, specifically a power supply operation circuit and an electronic atomization terminal with an atomizer as a load. Background Art

[0002] In an electronic cigarette, the power source for supplying electricity to the electronic cigarette may be a lithium-ion battery, which is a secondary battery and a rechargeable battery. The load of the battery may include a resistance heater, which atomizes the aerosol source held by the core. The resistance heater is, for example, composed of a resistance heater (e.g., a heating wire) wound on the core, and atomizes the tobacco flavor components contained in at least one of the aerosol source and the flavor source by heating with electricity.

[0003] In the prior art, in a battery assembly circuit that electrically heats a resistive heating element, a power protection chip is provided that monitors changes in the operating current in the circuit in real time, including real-time monitoring of the charging current or the supply current, and continuously adjusts the real-time current in the circuit using automatic feedback adjustment in the same functional mode. The more functional modes are configured, the larger the control process of the feedback adjustment becomes. High requirements are placed on the resistance accuracy of some over-discharge voltage protection chips and overheating protection chips, and continuous feedback adjustment is still required when excessive current or excessive voltage occurs in the battery assembly circuit. The closed circuit path will increase the probability of power degradation or dry burning of the atomizer during continuous adjustment. Summary of the Invention

[0004] This application discloses a power supply working circuit and an electronic atomization terminal, and the disclosed technical solutions are as follows:

[0005] A power supply working circuit, comprising a connecting unit, a line switch unit, a monitoring unit and a switch tube; the connecting unit can switchably connect the load and the charging interface; the connecting unit is connected to the line switch unit, which is connected to the monitoring unit; the connecting unit and the line switch unit are used to guide the monitoring unit into a charging mode or a power supply mode through a switch; the control electrode of the switch tube is connected to the monitoring unit; when the connecting unit is connected to the load, the connecting unit, the line switch unit and the monitoring unit are connected to form a closed loop for supplying power to the load, so that the monitoring unit switches into the power supply mode; the monitoring unit is used to turn on the switch tube after switching into the power supply mode to adjust the power supply to the load; when the connecting unit is connected to the charging When the interface is connected, the connection unit, the line switch unit and the monitoring unit are connected to form a closed loop for charging the monitoring unit, so that the monitoring unit switches to the charging mode; the monitoring unit is used to turn on the switch tube after switching to the charging mode to adjust the charging amount of the working power supply provided in the monitoring unit; the line switch unit is used to connect a circuit that stops supplying power to the load and / or stops charging the working power supply provided in the monitoring unit through corresponding switch branches; the line switch unit is used to form an electrically disconnected circuit by blowing a fuse when all switch branches are connected, so that the working power supply provided in the monitoring unit stops supplying power to the load and prevents the monitoring unit from automatically resuming power supply to the load.

[0006] Furthermore, the circuit switch unit includes a fuse, a first resistor, a second resistor, a second switch, and a first switch; the first resistor forms a first switch branch, one end of the first switch branch is connected to one end of the fuse, the other end of the first switch branch is connected to the monitoring unit, and the other end of the fuse is connected to the connection unit; the second resistor and the second switch are connected in series to form a second switch branch, one end of the second switch branch is connected to the connection unit, and the other end of the second switch branch is connected to the monitoring unit; the first switch forms a third switch branch, one end of the third switch branch is connected to the connection unit, and the other end of the third switch branch is connected to the monitoring unit; under the premise that the fuse is not blown, when the first switch is closed and the second switch is opened, regardless of whether the connection unit is connected to the load or the charging port, the circuit switch unit, the connection unit, the switch tube, and the monitoring unit are all connected to a closed loop, or the circuit switch unit, the connection unit, the switch tube, and the monitoring unit are all connected to a closed loop; when the first switch is closed and the second switch is closed, all switch branches are connected and the fuse is blown.

[0007] Furthermore, the connection unit also includes a bidirectional switch, a diode and a first capacitor; the diode and the first capacitor are connected to form a parallel branch; one end of the parallel branch is connected to the output end of the bidirectional switch, and the other end of the parallel branch is respectively connected to the negative power supply end of the load and the negative power supply end of the charging interface, and the two input ends of the bidirectional switch are respectively connected to the positive power supply end of the load and the positive power supply end of the charging interface, but the load and the charging interface are not connected to the power supply working circuit at the same time, so that the connection unit can switch the load and the charging interface.

[0008] Furthermore, the monitoring unit includes a third resistor, a fourth resistor, a fifth resistor, a working power supply and an MCU; one end of the third resistor is connected to the end of the first switch branch that is not connected to the fuse; one end of the third resistor is also connected to the positive pole of the working power supply, the negative pole of the working power supply is grounded, the other end of the third resistor is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to the voltage sampling end of the MCU; the switching tube is a PMOS tube, and the gate of the PMOS tube is the control electrode of the switching tube; the duty cycle output end of the MCU is connected to the gate of the switching tube, the power supply end of the MCU is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to the source of the switching tube, and the drain of the switching tube is connected between the third resistor and the fourth resistor; or, the switching tube is a PIGBT tube, and the gate of the PIGBT tube is the control electrode of the switching tube; the duty cycle output end of the MCU is connected to the gate of the switching tube, the power supply end of the MCU is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to the emitter of the switching tube, and the collector of the switching tube is connected between the third resistor and the fourth resistor.

[0009] Furthermore, when the first switch is closed, the second switch is disconnected, the switch tube is disconnected and the connection unit selects to connect the load, the connection unit, the first switch branch, the third switch branch and the monitoring unit are connected to form a closed loop for powering the load, and the voltage sampling end of the MCU detects the first sampling voltage to switch into the power supply mode; in the power supply mode, the pulse signal output by the duty cycle output end of the MCU turns on or off the switch tube, and changes the power supply amount of the load by adjusting the output pulse signal; wherein the power supply mode is a mode in which the working power supply supplies power to the load; the first switch is closed, the second switch is disconnected, the switch tube is disconnected When the connection unit chooses to connect to the charging interface, the connection unit, the first switch branch, the third switch branch and the monitoring unit are connected to form a closed loop for charging the working power supply in the monitoring unit, and the voltage sampling end of the MCU detects the second sampling voltage to switch into the charging mode; in the charging mode, the pulse signal output by the duty cycle output end of the MCU turns on or off the switch tube, and changes the charging amount of the working power supply by adjusting the output pulse signal; wherein, the charging mode is a mode in which the power input by the charging interface charges the working power supply; wherein, the second sampling voltage is not equal to the first sampling voltage.

[0010] Furthermore, the load is configured to atomize the aerosol source by heating or oscillating after being powered on, wherein the load and the aerosol source are both installed in the same electronic atomization terminal; under the premise that the connection unit is connected to the load, when the voltage sampling end of the MCU detects a first sampling voltage, the MCU identifies the load connected to the connection unit, and confirms that it has entered the power supply mode, and then repeatedly turns on and off the switch tube according to the timing cycle until the preset puff time has passed and the MCU turns off the switch tube; wherein the timing cycle is equal to the pulse width of the pulse signal output by the duty cycle output end of the MCU; wherein the preset puff time is used to indicate the time taken for the load to perform atomization, and is determined by the time of performing the inhalation action using the electronic atomization terminal.

[0011] Furthermore, after the preset puff time has elapsed since the voltage sampling end of the MCU detected the first sampling voltage, the duty cycle output end of the MCU turns off the switch tube, and the MCU is configured not to recognize the load and confirm that the load cannot continue to atomize the aerosol source. The working power supply stops supplying power to the load, but the MCU remains in a power supply mode so that the working power supply can resume supplying power to the load after the aerosol source is replaced. Wherein, when the connection unit is not connected to the load and the connection unit is not connected to the charging port, the voltage sampling end of the MCU detects a third sampling voltage, the first sampling voltage is not equal to the third sampling voltage, and the first sampling voltage is not equal to the second sampling voltage.

[0012] Furthermore, under the premise that the connection unit is connected to the charging interface, when the voltage sampling end of the MCU detects the second sampling voltage, the MCU identifies the charging interface connected to the connection unit, confirms the entry into the charging mode, and then keeps the switch on for a preset charging time. The preset charging time is set by a timer built into the MCU.

[0013] Furthermore, the monitoring unit also includes a voltage detection chip, a sixth resistor and a second capacitor; one end of the sixth resistor is connected to the positive electrode of the working power supply and the input end of the voltage detection chip at the same time, the other end of the sixth resistor is connected to one end of the second capacitor, the other end of the second capacitor is grounded, and the ground end of the voltage detection chip is grounded; the output end of the voltage detection chip is connected to the source end of the switching tube or the emitter of the switching tube; wherein, the voltage detection chip detects the output voltage of the working power supply through its input end and the sixth resistor, and the voltage detection chip stores the detected output voltage in the MCU through its output end and the fifth resistor.

[0014] Furthermore, when the third switch branch is disconnected, the monitoring unit cannot supply power to the load, and external power cannot charge the monitoring unit through the charging interface; when the third switch branch is connected and the first switch branch is disconnected, the fuse is not blown, and the monitoring unit supplies power to the load in the power supply mode, or charges the monitoring unit through the charging interface in the charging mode; when the third switch branch is connected and the first switch branch is connected, the fuse blows to irreversibly stop supplying power to the load, and promptly avoid damage to other components or chips when both the second switch and the first switch are closed; wherein, the current passing through the fuse when the third switch branch is connected and the first switch branch is connected is greater than the current passing through the fuse when the third switch branch is connected and the first switch branch is disconnected.

[0015] An electronic atomization terminal includes the power supply working circuit; the electronic atomization terminal also includes a load and a charging interface, wherein the load is used to continue to atomize the aerosol source under the power provided by the power supply working circuit, and the charging interface is used to charge the power supply working circuit using external power.

[0016] The technical effect of this application is that, compared with ordinary battery assemblies with power protection circuits, the power supply working circuit disclosed in this application utilizes the same connection unit to switchably connect the load and the charging interface. It is possible to selectively connect the load and the charging interface to the connection unit based on the physical connection of the load and the charging interface, and use a switch circuit module to achieve switchable connection of the load and the charging interface to the power supply working circuit. The load and the charging interface can be configured to be fixedly welded to the power supply working circuit, reducing the need for a dedicated power supply interface for the load RL; the charging interface is not reused as the power supply interface for the load RL, but the charging interface can be connected to various types of charging power sources; unless the relevant fixed welding points are released, the load RL and the charging interface are both non-detachably mounted on the printed circuit board where the power supply working circuit is located, saving the replacement and assembly operations of the load RL compared to the related detachable installation schemes in the prior art.

[0017] The circuit switch unit supports manual operation of closing and opening the corresponding switch branches. It can power the load or charge the working power supply when the third switch branch is closed. It can also electrically disconnect the circuit by blowing a fuse when all switch branches are connected, causing the working power supply within the monitoring unit to stop supplying power to the load. This is not affected by the duty cycle signal and the output voltage of the working power supply output by the MCU in real time. That is, when the fuse is blown, the entire circuit enters an irreversible disconnected state and cannot automatically return to a closed state. Compared with the continuous feedback power regulation method, it can prevent the monitoring unit from automatically resuming power supply to the load, achieving irreversible cessation of power supply to the load, and promptly avoid damage to other electronic components or chips when both the second and first switches are closed. This reduces the complexity and potential instability of continuously adjusting the over-discharge voltage protection chip or overheating protection chip in different operating modes, thereby reducing the probability of power supply degradation or dry burning of the atomizer, and facilitating the recharging of the atomizer device electrically connected to the power supply working circuit for reuse.

[0018] When the fuse blows, the circuit-switch unit enters an irreversible disconnected state. Temporarily changing the open / close state of the corresponding switch does not automatically restore it to a closed state. Therefore, the resistance in the second switch branch is independent of the resistance in the other switch branches and can be greater or less than the resistance of the first resistor. As long as the current flowing through the fuse when the second switch branch is closed exceeds the current flowing through the fuse in power supply mode (which can be recorded as the rated operating current), this is sufficient. Therefore, in each switch branch, there is no need to precisely calculate the resistance values ​​of the discrete resistors in some branches to meet the overcurrent and overvoltage requirements of the charging process.

[0019] The power supply mode and charging mode controlled by the monitoring unit are the result of combining the resistor's voltage divider value to wake the MCU into the corresponding operating mode and turn on the switch. Furthermore, the voltage detection chip can be used to further optimize switching between the two operating modes based on the output voltage detection results of the operating power supply, thereby improving the detection accuracy of the output voltage of the operating power supply. The conditions for turning on the switch in the charging mode and the power supply mode are different. If the opening and closing of the first, second, and third switch branches cannot distinguish the operating mode, the switch can be easily prevented from malfunctioning, reducing unnecessary energy consumption caused by unintentional switching on.

[0020] When the signal applied by the MCU to the control electrode of the switching tube is a pulse signal with an adjustable duty cycle or an adjustable pulse frequency, it can be repeatedly turned on and off in the power supply mode to limit the power supplied from the working power supply to the load. It can also be based on the remaining power of the working power supply and charge the working power supply by periodically turning on the switching tube to suppress the degradation of the working power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a power supply operating circuit disclosed in an embodiment. DETAILED DESCRIPTION

[0022] The specific embodiments of the present invention are further described below with reference to the accompanying drawings. In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] As an embodiment, a power supply working circuit is disclosed, specifically a power supply working circuit with an atomizer as a load, see Figure 1 It can be seen that the power working circuit includes a connection unit, a line switch unit, a monitoring unit and a switch tube; the connection unit can switchably connect the load RL and the charging interface, that is, the load RL and the charging interface can be selectively connected to the same connection unit; the load RL and the charging interface can exist outside the power working circuit at the same time, and the same connection unit cannot connect the load RL and the charging interface at the same time, wherein the load RL is used to atomize the aerosol source or heating fragrance source in the electronic atomization terminal where the power working circuit is located, and the external charging power supply can charge the working power supply inside the power working circuit through the charging interface, and the load RL and the charging interface can be set to be fixedly welded to the power working circuit, reducing the configuration of a dedicated power supply interface for the load RL; the charging interface is not reused as the power supply interface of the load RL, but the charging interface can be connected to various types of charging power supplies; unless the relevant fixed welding points are released, the load RL and the charging interface are both non-detachably installed in the printed circuit board where the power working circuit is located, which saves the replacement and assembly operations of the load RL compared to the relevant detachable installation scheme in the prior art.

[0024] In some embodiments, the load RL is not limited to a resistive heating element; any element capable of atomizing the aerosol source or heating the fragrance source may be used. The load RL may also be a heating element such as a heater or an oscillating element. Examples of heating elements used in the load RL include a heating resistor, a ceramic heater, and an induction heater. Furthermore, in this embodiment, the load RL is positioned near the liquid reservoir that stores the aerosol source; alternatively, the load RL may be positioned near the fragrance assembly that houses the fragrance source. Furthermore, the number of loads RL is not limited to one; they may also be positioned near the liquid reservoir and the fragrance assembly.

[0025] In this embodiment, the connection unit is connected to the circuit breaker unit, which is in turn connected to the monitoring unit. These connections refer to electrical connections. The connection unit and circuit breaker unit are used to direct the monitoring unit into charging mode or power supply mode via switches. The closed loop formed by the connection unit and circuit breaker unit via the switches includes a load RL, the connection unit, a closed loop formed by the circuit breaker unit and the monitoring unit, or a closed loop formed by the charging interface (which may be connected to an external charger or power supply), the connection unit, the circuit breaker unit, and the monitoring unit. The closed loop formed by the load RL, the connection unit, the circuit breaker unit, and the monitoring unit is conductive in power supply mode; the closed loop formed by the charging interface (which may be connected to an external charger or power supply), the connection unit, the circuit breaker unit, and the monitoring unit is conductive in charging mode. The control electrode of the switch is connected to the monitoring unit to receive control from the pulse signal output by the monitoring unit. Furthermore, the other electrodes of the switch are also connected to the monitoring unit to form a power supply path or a charging path within the monitoring unit. The connection unit, the circuit breaker unit, and the load RL are connected to form a closed loop.

[0026] In some embodiments, the switch tube can be a PMOS tube (P-type field-effect transistor) or PIGBT tube (P-type insulated gate bipolar transistor) power device, both of which are provided with a gate. The impedance of the switch tube is large when it is turned off and the resistance is small when it is turned on. Controlling the on-off between the drain and the source, or controlling the on-off between the collector and the emitter, requires connecting or disconnecting the control electrode. Among them, the PIGBT tube is a device composed of a MOS tube and a bipolar transistor. Its input electrode is a MOS tube and its output electrode is a PNP transistor. It combines the advantages of these two devices. It has the advantages of low driving power and fast switching speed of MOSFET devices, and the advantages of low saturation voltage and large capacity of bipolar devices. Its frequency characteristics are between MOSFET and power transistors. It can invert DC voltage into frequency-adjustable AC power and operate normally within a frequency range of tens of kHz.

[0027] When the connection unit is connected to the load RL, the connection unit, the line switch unit and the monitoring unit are connected to form a closed loop for supplying power to the load, that is, the load RL, the connection unit, the line switch unit and the monitoring unit are connected to form a connectable closed loop, so that the monitoring unit switches into the power supply mode, wherein the power supply mode is that the working power supply provided in the monitoring unit supplies power to the load RL; therefore, the monitoring unit is used to turn on the switch tube after switching into the power supply mode to adjust the power supply to the load, and the duty cycle can be used to adjust the power supply to the load, and the power supply to the load is derived from the amount of electricity output by the working power supply provided in the monitoring unit to the load RL; after turning on the switch tube in the power supply mode, the load RL, the connection unit, the line switch unit, the switch tube and the monitoring unit are connected to form a connectable closed loop, and under the premise that the corresponding switches in the connection unit and the line switch unit are closed and the switch tube is turned on, they are connected to form an electrically connected closed loop.

[0028] When the connection unit is connected to the charging interface, the connection unit, the circuit switch unit and the monitoring unit are connected to form a closed loop for charging the monitoring unit, that is, the charging interface, the connection unit, the circuit switch unit and the monitoring unit are connected to form a closed loop that can be connected, so that the monitoring unit switches to the charging mode, wherein the charging interface is externally connected to a charger or a charging power supply. After the charging interface is connected to the connection unit, it supports converting the external power into a constant level signal to meet the charging requirements of the power supply working circuit. The charging mode is that the external charging power supply charges the working power supply provided in the monitoring unit through the charging interface. The monitoring unit is used to turn on the switch tube after switching into the charging mode to adjust the charge amount of the working power supply provided in the monitoring unit. The charge amount of the working power supply can be adjusted by a timed turn-on method. The charge amount of the working power supply is derived from the power provided by an external charging power supply. The working power supply can be composed of a battery. After the switch tube is turned on in the charging mode, the charging interface, the connection unit, the line switch unit, the switch tube and the monitoring unit are connected to form a closed loop that can be connected. Under the premise that the corresponding switches in the connection unit and the line switch unit are closed and the switch tube is turned on, the external charging power supply is connected to form an electrically connected closed loop.

[0029] The circuit switch unit is used to connect, through corresponding switch branches, a circuit that stops supplying power to the load and / or a circuit that stops charging the working power supply provided in the monitoring unit; a plurality of switch branches are provided inside the circuit switch unit, and each switch branch is not necessarily connected to a switch or resistor; specifically, when one switch branch of the circuit switch unit is not connected, the circuit that stops supplying power to the load and the charging of the working power supply provided in the monitoring unit are also stopped; when the switch branch is connected, if the connection unit is connected to the charging interface, the circuit is connected to stop supplying power to the load but supports charging of the working power supply provided in the monitoring unit; if the connection unit is connected to the load, the circuit is connected to stop charging of the working power supply provided in the monitoring unit but supports supplying power to the load. The circuit switch unit is used to form an electrically disconnected circuit by blowing a fuse when all switch branches are connected, so that the working power supply within the monitoring unit stops supplying power to the load and prevents the monitoring unit from automatically resuming power supply to the load. The circuit switch unit also includes a fuse, which can be connected to the common terminal of all switch branches. Once the fuse is blown by a large current, the circuit switch unit becomes disconnected. Moreover, compared with a switch that can be manually changed to a closed state, the blowing of the fuse causes an irreversible electrical disconnection state, preventing the monitoring unit from automatically resuming power supply to the load unless a new fuse is replaced. As a result, the working power supply in the monitoring unit stops supplying power to the load and is not affected by the duty cycle signal and the output voltage of the working power supply output by the MCU in real time. At the same time, the working power supply cannot be charged through the charging interface. That is, when the fuse is blown, it means that the entire power supply working circuit enters an irreversible disconnected state, and temporarily changing the open and closed state of the corresponding switch cannot restore it to the closed state. Compared with the method of continuous feedback regulation of power, it can prevent the monitoring unit from automatically restoring to the electrically connected state. When all switch branches are connected, damage to other electronic components or chips is timely avoided. The complexity and potential instability of continuous adjustment of the over-discharge voltage protection chip or the overheating protection chip in different working modes are reduced, thereby reducing the probability of power supply degradation or dry burning of the atomizer; it is convenient to recharge the atomization device electrically connected to the power supply working circuit for reuse.

[0030] Based on the above embodiment, the circuit switch unit includes a fuse L1, a first resistor R1, a second resistor R2, a second switch S2, and the first switch S1. The first resistor R1 forms a first switch branch, one end of which is connected to one end of the fuse L1, and the other end of which is connected to the monitoring unit. In some embodiments, the first resistor R1 can also be connected in series with other resistors to form the first switch branch to meet the current demand for powering the load or the charging current demand for the working power supply. The other end of the fuse L1 is connected to the connection unit. The second resistor R2 and the second switch S2 are connected in series to form a second switch branch, one end of which is connected to the connection unit, and the other end of which is connected to the monitoring unit. The second switch branch can constitute an abnormal circuit and serve as an overcurrent warning. After the second switch S2 is closed, the second resistor R2 is connected in parallel with the first resistor R1 to increase the current passing through the fuse L1. If the current passing through the fuse L1 is greater than the current flowing through the fuse L1 when the second switch S2 is disconnected, then in the power supply mode (the electrical state in which the connection unit is connected to the load RL), after the second switch S2 is closed and the first switch S1 is closed, the total current of the first switch branch and the second switch branch is sufficient to melt the fuse L1. The resistance value of the second resistor R2 can be greater than the resistance value of the first resistor R1, or the resistance value of the second resistor R2 can be less than the resistance value of the first resistor R1. There is no restriction on the resistance value of the second resistor R2.

[0031] In this embodiment, the first switch S1 forms a third switch branch, one end of which is connected to the connection unit, and the other end of which is connected to the monitoring unit. The third switch branch and the first switch branch can be connected to the two ends of a sampling resistor (or voltage divider resistor) within the monitoring unit, respectively. In some embodiments, the first switch S1 can also be connected in series with another resistor to form a third switch branch to meet the current demand for powering the load or the charging current demand of the working power supply. If the fuse L1 is not blown, when the first switch S1 is closed and the second switch S2 is open, regardless of whether the connection unit is connected to the load RL or the charging port, the line switch unit, the connection unit, and the monitoring unit form a closed loop. This closed loop includes the third switch branch and the first switch branch, and may also include a switch tube. When the first switch S1 and the second switch S2 are closed, all switch branches are connected, and the fuse L1 is blown.

[0032] In this embodiment, when the third switch branch is disconnected (i.e., the third switch branch is not connected), when the first switch S1 is disconnected, neither the circuit that supplies power to the load nor the working power supply provided in the monitoring unit can be charged, that is, the monitoring unit cannot supply power to the load, and external power cannot charge the monitoring unit through the charging interface.

[0033] When the third switch branch is turned on (the first switch S1 is closed) but the second switch branch is turned off (the second switch S2 is turned off), if the connection unit is connected to the charging interface, a circuit is formed that stops supplying power to the load but supports charging the working power supply provided in the monitoring unit. If the connection unit is connected to the load, a circuit is formed that stops charging the working power supply provided in the monitoring unit but supports supplying power to the load. At this time, if the fuse L1 is not blown, the monitoring unit supplies power to the load in the power supply mode, or charges the monitoring unit through the charging interface in the charging mode.

[0034] When both the third and second switch branches are connected, and both the first and second switches S1 and S2 are closed, fuse L1 blows, irreversibly ceasing power supply to the load and ceasing charging of the monitoring unit's internal working power supply. This causes the circuit breaker unit to irreversibly disconnect, allowing the user to promptly address abnormal power conditions such as overcurrent or overvoltage, and preventing damage to other components or chips while both the second and first switches are closed. The current flowing through fuse L1 when the third and first switch branches are closed is greater than the current flowing through fuse L1 when the third and first switch branches are closed. Compared to the prior art method of regulating abnormal power conditions through closed-loop feedback, this embodiment avoids excessive power accumulation, thereby reducing the complexity and potential instability of continuously adjusting the over-discharge voltage protection chip or over-temperature protection chip across different operating modes, thereby reducing the probability of power supply degradation or atomizer dry burning.

[0035] In summary, when a fuse blows, the circuit-switch unit enters an irreversible disconnected state. Temporarily changing the open / close state of the corresponding switch does not automatically restore it to the closed state. Therefore, the resistance in the second switch branch is independent of the resistances in the other switch branches and can be greater or less than the first resistance, as long as the current flowing through the fuse when the second switch branch is closed exceeds the current flowing through the fuse in power supply mode (which can be recorded as the rated operating current). Therefore, in each switch branch, there is no need to accurately calculate the resistance values ​​of the discrete electronic components in some branches to meet the overcurrent and overvoltage requirements of the charging process.

[0036] As an example, Figure 1As shown, the connection unit also includes a bidirectional switch S3, a diode D1 and a first capacitor C1; the diode D1 and the first capacitor C1 are connected to form a parallel branch; one end of the parallel branch is connected to the output end of the bidirectional switch S3, and the other end of the parallel branch is respectively connected to the negative power supply end of the load RL and the negative power supply end of the charging interface, and the two input ends of the bidirectional switch S3 are respectively connected to the positive power supply end of the load RL and the positive power supply end of the charging interface, but the load RL and the charging interface are not connected to the power supply working circuit at the same time, so that the connection unit can switchably connect the load RL and the charging interface; the positive power supply end of the load RL, the load RL can be a heater or a vibration device with positive and negative power supply ends, and the charging interface includes but is not limited to a USB interface and a TYPE-C interface. In this embodiment, the parallel branch formed by diode D1 and first capacitor C1 serves as an electrical isolation design between the load RL and the charging interface switchably connected to the connection unit and the line switch unit. First capacitor C1 is a discharge path for accumulated charge. Diode D1 serves as a protection element. Because self-excited vibration (chattering) is prone to occur when an electrical load such as a sprayer is connected to the connection unit, diode D1 is a voltage regulator diode to prevent voltage spikes from damaging the line switch unit, the switch tube, or components and chips within the monitoring unit.

[0037] Specifically, the bidirectional switch S3 can switchably connect the load RL and the charging port. Therefore, the bidirectional switch S3 can be a single-pole double-throw switch or an air pressure sensor. Similarly, both the second switch S2 and the first switch S1 can be mechanical push-button switches. The bidirectional switch S3 supports manual pressing or automatic sensing of airflow changes to detect whether a puff has occurred. When the puffer begins to smoke, the bidirectional switch S3 is switched to connect the load RL, the first switch S1 is set to a closed state, and the second switch S2 is set to an open state, triggering the monitoring unit to supply power to the load RL via the circuit switch unit and the connection unit, thereby atomizing the aerosol source on the surface of the load RL. On the other hand, when the puffer stops smoking, the bidirectional switch S3 is switched to connect the charging port, the first switch S1 is set to a closed state, and the second switch S2 is set to an open state, triggering an external charging power supply to charge the power supply circuit through the charging port, and the load RL stops atomizing.

[0038] As an example, Figure 1As shown, the monitoring unit includes a third resistor R3, a fourth resistor R4, a fifth resistor R5, a working power supply, and an MCU (microcontroller, such as a single-chip microcomputer). One end of the third resistor R3 is connected to the end of the first switch branch that is not connected to the fuse L1, specifically, one end of the third resistor R3 is connected to one end of the first resistor R1. One end of the third resistor R3 is also connected to the positive electrode of the working power supply, and the negative electrode of the working power supply is grounded. The other end of the third resistor R3 is connected to one end of the fourth resistor R4, and the other end of the fourth resistor R4 is connected to the voltage sampling terminal of the MCU. Thus, the resistor voltage divider network formed by the third resistor R3 and the fourth resistor R4 divides the output voltage of the working power supply and provides voltage division information to the voltage sampling terminal of the MCU. This voltage division information can be used to feedback the charging amount of the working power supply in charging mode, or to feedback the supply amount of the working power supply in power supply mode. The working power supply supplies power to the MCU and the load RL. The working power supply can be a rechargeable battery such as a lithium-ion secondary battery. In this embodiment, the switching transistor can be a PMOS (P-type field-effect transistor) or PIGBT (P-type insulated gate bipolar transistor) power device, both of which have a gate. The switching transistor is a PMOS transistor, and the gate of the PMOS transistor serves as the control electrode of the switching transistor. The duty cycle output terminal of the MCU is connected to the gate of the switching transistor, the power supply terminal of the MCU is connected to one end of the fifth resistor R5, the other end of the fifth resistor R5 is connected to the source of the switching transistor, and the drain of the switching transistor is connected between the third resistor R3 and the fourth resistor R4. Alternatively, the switching transistor is a PIGBT transistor, and the gate of the PIGBT serves as the control electrode of the switching transistor. The duty cycle output terminal of the MCU is connected to the gate of the switching transistor, the power supply terminal of the MCU is connected to one end of the fifth resistor R5, the other end of the fifth resistor R5 is connected to the emitter of the switching transistor, and the collector of the switching transistor is connected between the third resistor R3 and the fourth resistor R4. The power supply end of the MCU receives the voltage output by the working power supply or the voltage detection result output by other detection chips through the fifth resistor R5, which can generally be a high level (greater than or equal to 3V); the pulse signal output by the duty cycle output end of the MCU is used to control the conduction and shutdown of the switching tube; in some embodiments, the control electrode of the switching tube can also be connected to one end of the fifth resistor R5. When the duty cycle output end of the MCU does not output a pulse signal, the gate of the switching tube is pulled up to a high level through the fifth resistor R5 to inhibit the switching tube from being turned on.

[0039] Based on the above embodiment, when the first switch S1 is closed, the second switch S2 is disconnected, the switch tube is disconnected and the connection unit chooses to connect the load RL, the connection unit, the first switch branch, the third switch branch and the monitoring unit are connected to form a closed loop for powering the load, and the voltage sampling end of the MCU detects the first sampling voltage to switch into the power supply mode; in the power supply mode, the pulse signal output by the duty cycle output end of the MCU turns on or off the switch tube. If the low-level signal of the pulse signal is applied to the control electrode and turns on the switch tube, the MCU can change the power supply to the load by adjusting the output pulse signal. The adjustment method is that the timer or PWM modulation generator inside the MCU adjusts the pulse width of the output pulse signal, wherein the power supply mode is a mode in which the working power supply supplies power to the load.

[0040] When the first switch S1 is closed, the second switch S2 is open, the switch tube is disconnected, and the connection unit selects to connect to the charging interface, the connection unit, the first switch branch, the third switch branch, and the monitoring unit are connected to form a closed loop for charging the working power supply in the monitoring unit. The voltage sampling terminal of the MCU detects the second sampled voltage to switch into charging mode. The charging interface may be provided with a voltage regulator for regulating the power supply voltage input to the charging interface to an AC voltage with a stable frequency or a constant DC voltage. In charging mode, a pulse signal output by the duty cycle output terminal of the MCU turns on or off the switch tube. If a high-level signal of the pulse signal is applied to the control electrode and turns on the switch tube, a low-impedance path is provided for the working power supply. The MCU can then change the charge amount of the working power supply by adjusting the output pulse signal. The adjustment method is that a timer or PWM modulation generator inside the MCU adjusts the pulse width of the output pulse signal. The charging mode is a mode in which the power input from the charging interface charges the working power supply. Therefore, the MCU changes the charging amount of the working power supply by adjusting the pulse width of the output pulse signal in the charging mode, and changes the discharging amount of the working power supply by adjusting the pulse width of the output pulse signal in the power supply mode.

[0041] It should be noted that the second sampling voltage is not equal to the first sampling voltage; wherein, once the first sampling voltage is detected, the MCU is triggered to identify that the load RL is connected to the connection unit; once the second sampling voltage is detected, the MCU is triggered to identify that the charging port is connected to the connection unit. Preferably, the resistance value of the load RL is less than the resistance value of the third resistor R3. When the switch tube is turned on, the discharge current of the working power supply preferentially flows to the load RL with lower resistance in the closed circuit formed by the load RL, the connection unit, the line open switch unit, and the third resistor R3, and then flows to the fourth resistor R4. The voltage collected by the voltage sampling terminal of the MCU is the first sampling voltage.

[0042] Compared to conventional battery assemblies with power protection circuits, the power supply operating circuit disclosed in the aforementioned embodiment utilizes the same connection unit to switchably connect the load and charging interface. This allows the load and charging interface to be selectively connected to the connection unit based on the physical connection between the load and charging interface. Using a switch circuit module, the load and charging interface can be switchably connected to the power supply operating circuit. The circuit switch unit supports manual operation of the corresponding switch branches, enabling power supply to the load or charging of the working power supply when the third switch branch is closed. It can also electrically disconnect the circuit by blowing a fuse when all switch branches are connected, causing the working power supply within the monitoring unit to stop supplying power to the load. This is unaffected by the duty cycle signal and working power supply output voltage output by the MCU in real time. Specifically, when the fuse is blown, the circuit switch unit enters an irreversible disconnect state, temporarily changing the open / close state of the corresponding switch and preventing it from returning to the closed state. Compared to a continuous feedback power regulation method, this prevents the monitoring unit from automatically resuming power supply to the load, achieving irreversible cessation of power supply to the load, and promptly preventing damage to other electronic components or chips when both the second and first switches are closed. This reduces the complexity and potential instability of continuously adjusting the over-discharge voltage protection chip or over-temperature protection chip in different operating modes, thereby reducing the probability of power supply degradation or dry burning of the atomizer.

[0043] Specifically, the load RL is configured to atomize the aerosol source by heating or oscillating after power is applied, wherein the load RL and the aerosol source are both installed in the same electronic atomization terminal, and the power supply working circuit is also provided in the electronic atomization terminal. The load RL can be fixedly connected to the power supply working circuit, while the aerosol source is replaceable. When the connection unit connects to the load RL, when the voltage sampling terminal of the MCU detects a first sampling voltage, the MCU identifies the load RL connected by the connection unit and confirms that it has entered the power supply mode. It then repeatedly turns on and off the switch tube according to a timing cycle to periodically adjust the power supply to avoid excessive temperature of the switch tube, maintain the electrical performance of the switch tube stable, and not increase the probability of power degradation or dry burning of the atomizer; until a preset puff time has passed, the duty cycle output terminal of the MCU outputs a constant level signal (a high level signal, generally above 3V) to turn off the switch tube, at which point the power supply operation to the load RL ends. If the gate of the switching tube is directly connected to the source of the switching tube through a resistor, it can be pulled up to a high level to keep the switching tube in the off state when no pulse signal is applied to the gate of the switching tube. The timing period is equal to the pulse width of the pulse signal output from the MCU's duty cycle output terminal, which can be generated by a timer. The duty cycle related to the pulse width can be less than 100%. The pulse width of the low-level signal in the pulse signal is positively correlated with the on-time of the switching tube. Furthermore, instead of pulse width control, pulse frequency control can also be used to adjust the amount of power supplied from the working power supply to the load RL. Therefore, when the signal applied by the MCU to the control electrode of the switching tube is a pulse signal with an adjustable duty cycle or pulse frequency, the switching tube can be repeatedly turned on and off in the power supply mode, limiting the power supplied from the working power supply to the load. Power is only supplied to the load RL when a power-sinking action occurs. This saves power and slows down the degradation of the working power supply without replacing the load RL.

[0044] It should be noted that the preset puff time is used to indicate the time taken by the load to perform atomization, and is determined by the time taken to perform the puffing action using the electronic atomization terminal. If the electronic atomization terminal is used to perform the puffing action, the first switch S1 is closed, the second switch S2 is disconnected, the switch tube is disconnected, and the connection unit is connected to the load, then the power supply mode is entered at the time point when the puffing action is started, and the cumulative time taken by the voltage sampling end of the MCU from detecting the first sampling voltage to the duty cycle output end of the MCU outputting a constant level signal is configured as the preset puff time. The duration of the power supply mode can be the timing time of detecting the preset puff time from the time the voltage sampling end of the MCU detects the first sampling voltage. Alternatively, it is preferred that the switch tube is turned on for a short time so that the power required to atomize the aerosol source in the power supply mode is less than the power supply to the working power load RL.

[0045] In some embodiments, if the first switch S1 is an inhalation sensor, the time point at which power supply to the load ends (the end time point of the power supply mode) can also be the time point when the inhalation sensor detects the end of the user's inhalation. When the inhalation sensor detects the end of the user's inhalation through the change in airflow, the switch is disconnected, disconnecting the third switch branch and stopping power supply to the load RL. Furthermore, the working power supply can be charged by periodically turning on the switch tube based on the remaining power of the working power supply to prevent deterioration of the working power supply.

[0046] Preferably, after the preset puff time has elapsed since the voltage sampling end of the MCU detected the first sampled voltage, the duty cycle output end of the MCU turns off the switch tube. The MCU is configured not to recognize the load and confirm that the load cannot continue to atomize the aerosol source. The MCU then deauthenticates the load, and the working power supply stops supplying power to the load. At this time, the MCU can prompt a request to replace the aerosol source, but the MCU remains in power supply mode. Of course, the third switch branch is not disconnected, nor is the switch tube disconnected, so that the working power supply can resume supplying power to the load after the aerosol source is replaced. Therefore, in this preferred embodiment, the time for replacing the aerosol source or the interval between the user's puffs is set as the time interval for the MCU to deauthenticate the load. After the MCU times this time interval, the voltage sampling end of the MCU will redetect the first sampled voltage, and the duty cycle output end of the MCU will trigger the switch tube to turn back on.

[0047] In addition, when the connection unit is not connected to a load and the connection unit is not connected to a charging interface, the current discharged from the working power supply preferentially flows through the resistance branch with a low resistance value in the monitoring unit or the line switch unit, for example, through the third resistor R3 and / or the fourth resistor R4. The MCU detects the voltage drop in the fourth resistor at this time as a third sampling voltage that is different from the first sampling voltage and the second sampling voltage. That is, the voltage sampling terminal of the MCU detects the third sampling voltage, and the MCU does not recognize the load and the charging interface, and enters a non-powered state, without turning on the switch tube; wherein the first sampling voltage is not equal to the third sampling voltage, and the first sampling voltage is not equal to the second sampling voltage. This reduces unnecessary energy consumption caused by the switch tube being unintentionally turned on.

[0048] On the other hand, under the premise that the connection unit is connected to the charging interface, the charging interface transmits the power output by the charging power source to the monitoring unit. When the voltage sampling terminal of the MCU detects the second sampling voltage, the MCU identifies the charging interface connected to the connection unit, and may further identify the charging power source (such as a charging adapter or other charging device), and confirms that the charging mode has been entered. Specifically, when the charging interface is connected to the connection unit, a charging current is transmitted from the external charging power source through the charging interface. The externally transmitted charging current preferentially charges the working power source with a lower resistance value in the parallel circuit of the line switch unit and the monitoring unit. At this time, the voltage at the common end of the third resistor R3 and the fourth resistor R4 drops to nearly 0. Since the voltage drop in the fourth resistor R4 is almost maintained, the voltage sampling terminal of the MCU detects the second sampling voltage, and the second sampling voltage is less than the first sampling voltage.

[0049] In the charging mode, the switch tube is kept turned on for a preset charging time, which is set by a timer set in the MCU. During the preset charging time, the current keeps flowing from the charging interface to the working power supply, and the working power supply is charged and starts to be charged when the second sampling voltage is detected from the voltage sampling end of the MCU. After the preset charging time has passed since the second sampling voltage is detected from the voltage sampling end, the user will be prompted through the indicator circuit connected to the MCU. For example, the indicator circuit connected to the MCU has multiple branches formed by current limiting resistors and light-emitting diodes connected in series, and each branch can be connected to the corresponding indicator light control end of the MCU, which is not shown in the figure.

[0050] In this embodiment, the preset charging time is inversely correlated with the remaining power of the working power supply in the power supply mode switched last time; the more the MCU detects that the working power supply has remaining power in the power supply mode switched last time, the shorter the preset charging time is set; the less the MCU detects that the working power supply has remaining power in the power supply mode switched last time, the longer the preset charging time is set, up to the maximum charging time required to fully charge the working power supply.

[0051] Preferably, each time the preset charging time elapses, the device enters a waiting time, and after a waiting time, enters the next preset charging time or switches to the power supply mode; or each time the preset charging time elapses, the device switches to the power supply mode; wherein the waiting time may be the time for replacing the aerosol source disclosed in the aforementioned embodiment, the interval time of the user's puffing action, or the preset puffing time.

[0052] In some embodiments, the MCU records the voltage signal collected by its voltage sampling terminal. For example, in charging mode, the MCU records the number of times the second sampled voltage repeatedly appears within the preset charging time, and in power supply mode, the MCU records the number of times the first sampled voltage repeatedly appears within a specified time. Preferably, in charging mode, if it is detected that the second sampled voltage collected by the voltage sampling terminal repeatedly appears within the preset charging time for a number of times other than the specified number of detections, the MCU recognizes that the connection unit is not connected to the charging interface, which may be to confirm that the charging power supply is disconnected and the authentication of the charging interface is deactivated, and then the MCU sets the switch tube to off.

[0053] Therefore, for the power supply mode and charging mode dominated by the monitoring unit, the conditions for turning on the switch tube are different. When the closing of the first switch branch, the second switch branch, and the third switch branch cannot distinguish the working mode, the voltage sampling end of the MCU turns on the switch tube when detecting the second sampling voltage and turns on for a period of time in the charging mode before turning it off, or the voltage sampling end of the MCU periodically turns on the switch tube when detecting the first sampling voltage and maintains it for a limited time, thereby suppressing malfunction of the switch tube, especially in the case of self-excited vibration (chattering) occurring on the voltage divider resistor when the load is connected to the connection unit, thereby suppressing the MCU from detecting that the charging interface is connected to the connection unit; thereby reducing unnecessary energy consumption caused by unintentional turning on of the switch tube.

[0054] As an embodiment, the monitoring unit further includes a voltage detection chip, a sixth resistor R6, and a second capacitor C2; one end of the sixth resistor R6 is connected to the positive electrode of the working power supply and the input end VCC of the voltage detection chip at the same time, the other end of the sixth resistor R6 is connected to one end of the second capacitor C2, the other end of the second capacitor C2 is grounded, and the ground end GND of the voltage detection chip is grounded; the output end VCOUT of the voltage detection chip is connected to the source end of the switch tube or the emitter of the switch tube, and the output end VCOUT of the voltage detection chip is connected to the power end of the MCU through the fifth resistor R5, so that the MCU obtains the output voltage or remaining power information of the working power supply in real time. Wherein, the voltage detection chip detects the output voltage of the working power supply through its input end VCC and the sixth resistor R6, and the voltage detection chip stores the detected output voltage in the MCU through its output end VCOUT and the fifth resistor R5. When the MCU detects that the output voltage of the working power supply is lower than the preset remaining power threshold, the MCU is not in the power supply mode, and can disconnect the switch tube, or disconnect the first switch S1, or trigger the connection unit to switch to the charging interface to enter the charging mode, triggering the working power supply to not supply power to the load. Therefore, the power supply mode and charging mode dominated by the monitoring unit are the result of combining the voltage divider value of the resistor to wake up the MCU to enter the corresponding working mode and the conduction of the switch tube; the voltage detection chip can also be used to further optimize the switching of the two working modes based on the detection results of the output voltage of the working power supply, thereby improving the detection accuracy of the output voltage of the working power supply.

[0055] In some embodiments, the voltage detection chip includes a current detection circuit and a voltage detection circuit, both of which can be composed of known electrical modules with corresponding functions. Alternatively, the chip can detect whether the voltage difference between the input terminal VCC and the ground terminal GND is higher than a predetermined threshold. If so, it indicates that the working power supply has discharged excessively. The chip can then disconnect the switch, disconnect the first switch S1, or trigger the connection unit to switch to the charging port to enter charging mode, thereby triggering the working power supply to stop supplying power to the load. If not, it indicates that there has been no discharge excessively.

[0056] In some embodiments, inside the voltage detection chip, since overcurrent detection needs to ensure the temperature coefficient, an independent bandgap reference voltage generation circuit and a voltage comparator are required, and there is a large input offset voltage, which greatly reduces the detection accuracy. Therefore, when the current passing through the fuse is too large, the fuse can be blown, and the voltage detection chip no longer continues to perform voltage and current detection, and the MCU does not need to follow the power information of the working power supply fed back by the voltage detection chip.

[0057] Based on the aforementioned embodiment, an electronic atomization terminal is further disclosed, comprising the power supply circuit; the electronic atomization terminal further comprising a load RL and a charging interface, wherein the load RL is configured to continue atomizing the aerosol source under the power provided by the power supply circuit, and the charging interface is configured to charge the power supply circuit using external power. The charging interface is not reused as a power supply interface for the load, and the aerosol source is replaceable, but the load is fixedly connected to the electronic atomization terminal.

[0058] In the electronic atomization terminal, the charging interface can be connected to various types of charging power supplies, and the voltage stabilizing circuit inside the interface converts the connected various types of charging power supplies into a pulse signal with a constant level. The load RL can also be a resistance heating body. The resistance heating body atomizes the aerosol source held by the core. The resistance heating body is composed of, for example, a resistance heating body (for example, a heating wire) wound on the core. The load RL can also be an oscillating element for controlling the vibration of the aerosol source on its surface by ultrasonic means to perform atomization operations.

[0059] In the electronic atomization terminal, the load RL is positioned near a liquid reservoir storing an aerosol source. Alternatively, the load RL can be positioned near a fragrance assembly housing a fragrance source. Furthermore, the number of loads RL is not limited to one; they can also be positioned near the liquid reservoir and the fragrance assembly.

[0060] While the present invention has been described through the above embodiments, the discussion and drawings forming part of this disclosure should not be construed as limiting the present invention. Various alternative embodiments, examples, and application techniques will be readily apparent to those skilled in the art from this disclosure. For example, the structures described in the above embodiments may be combined and / or replaced with each other as much as possible.

[0061] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

Claims

1. A power supply working circuit, characterized in that: The power supply working circuit includes a connection unit, a line switch unit, a monitoring unit and a switch tube; The connection unit can switchably connect the load and the charging interface; the load and the charging interface are both non-detachably mounted on the printed circuit board where the power supply working circuit is located; The connection unit is connected to the line switch unit, and the line switch unit is connected to the monitoring unit; the connection unit and the line switch unit are used to guide the monitoring unit to enter the charging mode or the power supply mode through the switch; the control electrode of the switch tube is connected to the monitoring unit; When the connection unit is connected to the load, the connection unit, the line switch unit and the monitoring unit are connected to form a closed loop for supplying power to the load, so that the monitoring unit switches into the power supply mode; the monitoring unit is used to turn on the switch tube after switching into the power supply mode to adjust the power supply amount of the load; When the connection unit is connected to the charging interface, the connection unit, the circuit switch unit, and the monitoring unit are connected to form a closed loop for charging the monitoring unit, so that the monitoring unit switches into a charging mode; the monitoring unit is configured to turn on the switch tube after switching into the charging mode to adjust the charge level of the working power supply provided in the monitoring unit; A circuit switch unit, configured to connect, through corresponding switch branches, a circuit for stopping supplying power to the load and / or a circuit for stopping charging the working power supply provided in the monitoring unit; A circuit switch unit, configured to electrically disconnect the circuit by blowing a fuse when all switch branches are connected, so that the working power supply provided in the monitoring unit stops supplying power to the load and prevents the monitoring unit from automatically resuming power supply to the load; The circuit breaker unit includes a fuse, a first resistor, a second resistor, a second switch, and a first switch; The first resistor forms a first switch branch, one end of the first switch branch is connected to one end of the fuse, the other end of the first switch branch is connected to the monitoring unit, and the other end of the fuse is connected to the connection unit; The second resistor and the second switch are connected in series to form a second switch branch, one end of the second switch branch is connected to the connection unit, and the other end of the second switch branch is connected to the monitoring unit; The first switch forms a third switch branch, one end of the third switch branch is connected to the connection unit, and the other end of the third switch branch is connected to the monitoring unit; Under the premise that the fuse is not blown, when the first switch is closed and the second switch is open, no matter whether the connection unit is connected to the load or the charging port, the circuit breaker unit, the connection unit, and the monitoring unit are all connected to form a closed loop, or the circuit breaker unit, the connection unit, the switch tube, and the monitoring unit are all connected to form a closed loop; When the first switch is closed and the second switch is closed, all switch branches are connected and the fuse is blown.

2. The power supply operating circuit according to claim 1, characterized in that: The connection unit also includes a bidirectional switch, a diode and a first capacitor; the diode and the first capacitor are connected to form a parallel branch; one end of the parallel branch is connected to the output end of the bidirectional switch, and the other end of the parallel branch is respectively connected to the negative power supply end of the load and the negative power supply end of the charging interface; the two input ends of the bidirectional switch are respectively connected to the positive power supply end of the load and the positive power supply end of the charging interface, but the load and the charging interface are not connected to the power supply working circuit at the same time, so that the connection unit can switchably connect the load and the charging interface.

3. The power supply operating circuit according to claim 1, characterized in that: The monitoring unit includes a third resistor, a fourth resistor, a fifth resistor, a working power supply and an MCU; One end of the third resistor is connected to the end of the first switch branch that is not connected to the fuse; One end of the third resistor is also connected to the positive electrode of the working power supply, the negative electrode of the working power supply is grounded, the other end of the third resistor is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to the voltage sampling terminal of the MCU; The switching tube is a PMOS tube, and the gate of the PMOS tube is the control electrode of the switching tube; the duty cycle output end of the MCU is connected to the gate of the switching tube, the power supply end of the MCU is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to the source of the switching tube, and the drain of the switching tube is connected between the third resistor and the fourth resistor; or, the switching tube is a PIGBT tube, and the gate of the PIGBT tube is the control electrode of the switching tube; the duty cycle output end of the MCU is connected to the gate of the switching tube, the power supply end of the MCU is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to the emitter of the switching tube, and the collector of the switching tube is connected between the third resistor and the fourth resistor.

4. The power supply operating circuit according to claim 3, characterized in that: When the first switch is closed, the second switch is open, the switch tube is disconnected, and the connection unit selects to connect to the load, the connection unit, the first switch branch, the third switch branch, and the monitoring unit are connected to form a closed loop for powering the load, and the voltage sampling terminal of the MCU detects the first sampled voltage to switch into the power supply mode; in the power supply mode, the pulse signal output by the duty cycle output terminal of the MCU turns on or off the switch tube, and the power supply amount of the load is changed by adjusting the output pulse signal; wherein the power supply mode is a mode in which the working power supply supplies power to the load; When the first switch is closed, the second switch is open, the switch tube is disconnected, and the connection unit selects to connect to the charging interface, the connection unit, the first switch branch, the third switch branch, and the monitoring unit are connected to form a closed loop for charging the working power supply in the monitoring unit. The voltage sampling terminal of the MCU detects the second sampled voltage to switch into the charging mode. In the charging mode, the pulse signal output by the duty cycle output terminal of the MCU turns on or off the switch tube, and the charge amount of the working power supply is changed by adjusting the output pulse signal. The charging mode is a mode in which the power input from the charging interface charges the working power supply. The second sampling voltage is not equal to the first sampling voltage.

5. The power supply operating circuit according to claim 4, characterized in that: The load is configured to atomize the aerosol source by heating or oscillating after being powered on, wherein the load and the aerosol source are both installed in the same electronic atomization terminal; Under the premise that the connection unit is connected to the load, when the voltage sampling terminal of the MCU detects the first sampling voltage, the MCU identifies the load connected to the connection unit and confirms that the power supply mode has been entered, and then repeatedly turns on and off the switch tube according to the timing cycle until a preset puffing time has passed and the MCU turns off the switch tube; wherein the timing cycle is equal to the pulse width of the pulse signal output by the duty cycle output terminal of the MCU; The preset puff time is used to indicate the time taken for the load to perform atomization, and is determined by the time taken to perform an inhalation action using the electronic atomization terminal.

6. The power supply operating circuit according to claim 5, characterized in that: After the preset puff time has elapsed since the voltage sampling terminal of the MCU detected the first sampled voltage, the duty cycle output terminal of the MCU turns off the switch tube. The MCU is configured to not recognize the load and confirm that the load is unable to continue atomizing the aerosol source. The working power supply stops supplying power to the load, but the MCU remains in a power supply mode so that the working power supply can resume supplying power to the load after the aerosol source is replaced. Among them, when the connection unit is not connected to the load and the connection unit is not connected to the charging interface, the voltage sampling end of the MCU detects the third sampling voltage, the first sampling voltage is not equal to the third sampling voltage, and the first sampling voltage is not equal to the second sampling voltage.

7. The power supply operating circuit according to claim 5, characterized in that: On the premise that the connection unit is connected to the charging interface, when the voltage sampling end of the MCU detects the second sampling voltage, the MCU identifies the charging interface connected to the connection unit, confirms entering the charging mode, and then keeps the switch on for a preset charging time. The preset charging time is set by a timer built into the MCU.

8. The power supply operating circuit according to claim 3, characterized in that: The monitoring unit further includes a voltage detection chip, a sixth resistor and a second capacitor; One end of the sixth resistor is connected to the positive electrode of the working power supply and the input end of the voltage detection chip at the same time, the other end of the sixth resistor is connected to one end of the second capacitor, the other end of the second capacitor is grounded, and the ground end of the voltage detection chip is grounded; the output end of the voltage detection chip is connected to the source end of the switching tube or the emitter of the switching tube; The voltage detection chip detects the output voltage of the working power supply through its input terminal and the sixth resistor, and the voltage detection chip stores the detected output voltage in the MCU through its output terminal and the fifth resistor.

9. The power supply operating circuit according to claim 1, characterized in that: When the third switch branch is disconnected, the monitoring unit cannot supply power to the load, and external power cannot charge the monitoring unit through the charging interface; When the third switch branch is turned on and the first switch branch is turned off, the fuse is not blown, and the monitoring unit supplies power to the load in the power supply mode, or charges the monitoring unit through the charging interface in the charging mode; When the third switch branch is turned on and the first switch branch is turned on, the fuse blows to irreversibly stop supplying power to the load, and in a state where both the second switch and the first switch are closed, damage to other components or chips is avoided in a timely manner; The current passing through the fuse when the third switch branch is turned on and the first switch branch is turned on is greater than the current passing through the fuse when the third switch branch is turned on and the first switch branch is turned off.

10. An electronic atomization terminal, characterized in that: The electronic atomization terminal includes the power supply working circuit described in any one of claims 1 to 9; the electronic atomization terminal also includes a load and a charging interface, wherein the load is used to continue to atomize the aerosol source under the power provided by the power supply working circuit, and the charging interface is used to charge the power supply working circuit using external power.

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