CN113303506B

CN113303506B - Tobacco stem and electronic cigarette

Info

Publication number: CN113303506B
Application number: CN202110548338.0A
Authority: CN
Inventors: 宋利军; 肖春兰
Original assignee: Xi'an Wenxian Semiconductor Technology Co ltd
Current assignee: Xi'an Wenxian Semiconductor Technology Co ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2024-01-12
Anticipated expiration: 2041-05-19
Also published as: CN113303506A

Abstract

The invention provides a cigarette rod, which comprises a battery and a battery protection circuit, wherein the battery protection circuit detects and senses that a cigarette cartridge is connected with the cigarette rod in a shipping mode and controls the cigarette rod to exit from the shipping mode, the battery protection circuit comprises a voltage acquisition end, and the battery protection circuit acquires voltage change of the voltage acquisition end before and after the cigarette cartridge is connected with the cigarette rod to control the cigarette rod to exit from shipping. In particular, various realization circuit structures of the battery protection circuit are further disclosed. An electronic cigarette is also provided. According to the method, the device and the system, according to the connection state of the tobacco rods and the tobacco cartridges, the ship mode is automatically detected to be exited, energy consumption is saved, the use habit of a user is not changed, and the experience of the user is improved. Meanwhile, the method has the advantages of low cost and intensification.

Description

Tobacco stem and electronic cigarette

Technical Field

The application relates to the technical field of electronic cigarettes, in particular to a tobacco rod and an electronic cigarette.

Background

An electronic cigarette is an electronic product imitating a cigarette, and comprises a tobacco rod and a cigarette bullet, which are usually separated, and the tobacco rod and the cigarette bullet are assembled together for smoking after being purchased by a consumer. The atomizer, the control circuit, the battery and the like are usually arranged in the tobacco stem, the atomizer comprises a tobacco pipe for storing tobacco tar and a heating wire for heating the tobacco tar pipe to generate smoke, and the smoke quantity is regulated by controlling the power of the heating wire.

The existing electronic cigarette can not be automatically switched among a working state, a standby state and a dormant state, so that the electronic cigarette has high power consumption, and the service time and the service life of a battery are influenced.

Therefore, it is desirable that the stem of the electronic cigarette is capable of automatically performing an operation state transition according to the connection condition with the cartridge, so that the stem automatically enters a low power consumption shipping mode after the stem and the cartridge are separated, and the stem automatically exits the shipping mode after the stem and the cartridge are connected.

Disclosure of Invention

The technical problem to be solved by the embodiment of the application is to provide a tobacco stem and an electronic cigarette. The problem that after the tobacco stems are connected with the tobacco cartridges in the prior art, the tobacco stems cannot automatically exit from a shipping mode is solved, and meanwhile, the intensive improvement problems of reducing component changes as much as possible and reducing implementation cost as much as possible are also considered on the basis of a control circuit of the existing tobacco stems in a limited space. And through inserting the cigarette bullet, the cigarette pole is automatic to withdraw from shipping mode, pulls out the cigarette bullet, and the cigarette pole is automatic to get into shipping mode, does not change user's use habit, promotes user's experience.

To solve the above technical problem, a first aspect of the embodiments of the present application provides a tobacco stem, where the tobacco stem includes a battery and a battery protection circuit, and in a shipping mode, the battery protection circuit detects that a cartridge is sensed to be connected with the tobacco stem, and controls the tobacco stem to exit from the shipping mode, where the shipping mode is a low-power consumption mode.

Preferably, the battery protection circuit comprises a voltage acquisition end, and the battery protection circuit acquires voltage change of the voltage acquisition end before and after the connection of the cartridge and the tobacco stem so as to control the exiting of shipping.

Preferably, the battery protection circuit comprises a power supply pin electrically connected with the positive electrode of the battery, a power supply grounding pin electrically connected with the negative electrode of the battery, and a system grounding pin, wherein the voltage acquisition end is correspondingly the system grounding pin; the cigarette rod comprises a thimble anode and a thimble cathode which are electrically connected with the cigarette bullet, the system grounding pin is electrically connected with the thimble cathode, and a divider resistor is connected in series between the power supply grounding pin and the thimble anode; the smoke rod is disconnected between the system grounding pin and the power supply grounding pin in a shipping mode; the cigarette bullet is connected with the tobacco stem, battery protection circuit detects and perceives the system ground pin voltage variation, control the tobacco stem withdraws from shipping mode.

Preferably, the cartridge is connected with the tobacco stem, the internal detection circuit of the battery protection circuit detects that the voltage of the system ground pin is lower than a preset threshold value and outputs a second state signal, and the battery protection circuit controls the tobacco stem to exit from the shipping mode according to the second state signal.

Preferably, the battery protection circuit comprises one end of a first switch unit electrically connected with a system grounding pin, the other end of the first switch unit is electrically connected with a first internal resistor and then connected with the power supply pin of the power supply, and the system grounding pin is also electrically connected with an internal detection circuit; the smoke rod is in a shipping mode, the system grounding pin is disconnected from the power supply grounding pin, the first switch unit is connected, and the internal detection circuit detects the voltage of the system grounding pin and outputs a first state signal; the cigarette bullet is connected with the cigarette stem, a cigarette bullet internal resistance and a voltage dividing resistor are connected in series between the system grounding pin and the power supply grounding pin, and the voltage of the power supply pin is the battery voltage V1, so that the system grounding pin is provided with a detection voltage Vc=V1 (Rf+Rd) to be less than the detection voltage Vc=V1

(Rf+Rd+Rn1), wherein the detection voltage Vc, the battery voltage V1, the voltage dividing resistor Rf, the internal resistance Rd of the cigarette cartridge and the first internal resistor Rn1 are adopted, the internal detection circuit detects the voltage of the system grounding pin and outputs a second state signal, and the battery protection circuit controls the cigarette rod to exit from the shipping mode.

Preferably, the internal detection circuit is a NOT gate, the voltage of the system ground pin is approximately equal to the battery voltage in the shipping mode of the tobacco stem, and the NOT gate outputs a first state signal as a logic low level signal; and the smoke cartridge is connected with the smoke rod, the detection voltage of the system grounding pin is smaller than the battery voltage, and the NOT gate outputs a second state signal which is a logic high level signal.

Preferably, the battery protection circuit comprises a power supply pin electrically connected with the positive electrode of the battery, a power supply grounding pin electrically connected with the negative electrode of the battery, and a system grounding pin; the cigarette rod comprises a thimble anode and a thimble cathode which are used for being electrically connected with a cigarette bullet, the system grounding pin is electrically connected with the thimble cathode, a first NMOS tube is connected in series between the power supply grounding pin and the thimble anode, the drain electrode of the first NMOS tube corresponds to a communicating electrode electrically connected with the thimble anode, the source electrode of the first NMOS tube corresponds to a communicating electrode electrically connected with the power supply grounding pin, and the grid electrode of the first NMOS tube corresponds to a control electrode electrically connected with the system grounding pin; the smoke rod is disconnected between the system grounding pin and the power supply grounding pin in a shipping mode; the cigarette bullet is connected with the tobacco stem, battery protection circuit detects and perceives the system ground pin voltage variation, control the tobacco stem withdraws from shipping mode.

Preferably, the battery protection circuit comprises one end of a first switch electrically connected with a system grounding pin, the other end of the first switch is electrically connected with a first internal resistor and then connected with the power supply pin of the power supply, and the system grounding pin is also electrically connected with an internal detection circuit; the smoke rod is disconnected between the system grounding pin and the power supply grounding pin in a shipping mode, the first switch is conducted, and the internal detection circuit detects the voltage of the system grounding pin and outputs a first state signal; the cigarette bullet is connected with the cigarette stem, the cigarette bullet internal resistance is connected between the drain electrode and the grid electrode of the first NMOS tube, so that discharge is carried out between the system grounding pin and the power supply grounding pin (GND) through the cigarette bullet internal resistance and the first NMOS tube, the voltage Vc of the system grounding pin is reduced along with the discharge of the first NMOS tube, and the internal detection circuit detects that the voltage of the system grounding pin is lower than a threshold value and outputs a second state signal; and the battery protection circuit controls the tobacco stems to exit from the shipping mode according to the second state signal.

Preferably, the battery protection circuit comprises a power supply pin electrically connected with the positive electrode of the battery, a power supply grounding pin electrically connected with the negative electrode of the battery, and a system grounding pin, wherein the voltage acquisition end is correspondingly the system grounding pin; the tobacco stem comprises a thimble anode and a thimble cathode which are used for being electrically connected with a tobacco cartridge, a system grounding pin is electrically connected with the thimble cathode, two NMOS tubes which are connected in series are connected between a power supply grounding pin and the thimble anode, wherein a source electrode of a first NMOS tube is electrically connected with a source electrode of a second NMOS tube, a communicating electrode which is electrically connected with the thimble anode corresponds to a drain electrode of the first NMOS tube, a communicating electrode which is electrically connected with the power supply grounding pin corresponds to a drain electrode of the second NMOS tube, and a control electrode which is electrically connected with the system grounding pin corresponds to a common electrical connection position of a grid electrode of the first NMOS tube and a grid electrode of the second NMOS tube; the smoke rod is disconnected between the system grounding pin and the power supply grounding pin in a shipping mode; the cigarette bullet is connected with the tobacco stem, battery protection circuit detects and perceives the system ground pin voltage variation, control the tobacco stem withdraws from shipping mode.

Preferably, the battery protection circuit comprises one end of a first switch electrically connected with a system grounding pin, the other end of the first switch is electrically connected with a first internal resistor and then connected with the power supply pin of the power supply, and the system grounding pin is also electrically connected with an internal detection circuit; the smoke rod is disconnected between the system grounding pin and the power supply grounding pin in a shipping mode, the first switch is conducted, and the internal detection circuit detects the voltage of the system grounding pin and outputs a first state signal; the cigarette bullet is connected with the cigarette stem, the cigarette bullet internal resistance is connected between the drain electrode and the grid electrode of the first NMOS tube, so that discharge is carried out between the system grounding pin and the power supply grounding pin (GND) through the cigarette bullet internal resistance, the first NMOS tube and the second NMOS tube, the voltage Vc of the system grounding pin is reduced along with the discharge of the first NMOS tube and the second NMOS tube, and the internal detection circuit detects that the voltage of the system grounding pin is lower than a threshold value and outputs a second state signal; and the battery protection circuit controls the tobacco stems to exit from the shipping mode according to the second state signal.

An electronic cigarette comprising a tobacco rod according to any preceding claim.

The implementation of the embodiment of the application has the following beneficial effects: the cigarette stem internal circuit under the prior art condition is only slightly changed, and the cigarette stem internal circuit comprises a voltage acquisition end and a corresponding acquisition circuit, so that the automatic shipment control can be realized after the cigarette cartridge is inserted into the cigarette stem, the hardware circuit is slightly changed, and the cigarette stem internal circuit can be realized in a limited space and has low cost. The battery protection circuit of the cigarette rod enters the shipping mode through the cigarette cartridge being pulled out of the cigarette rod, the electric quantity of the battery can be greatly saved, in addition, in the shipping mode, at least part of units of the battery protection circuit are stopped to supply power, so that the battery only needs to supply power to a few circuit units such as an internal detection circuit INV1 of the battery protection circuit, the electric quantity consumption of the battery is further reduced, the electric current consumption of the cigarette rod can be reduced to a few nA/h, the electric quantity retention time of the battery can be prolonged, even if the capacity of the battery is smaller, the electric quantity of the battery can be kept for half a year to a year in the shipping mode, after a user takes an electronic cigarette, the battery protection circuit can be withdrawn from the shipping mode through the insertion of the cigarette cartridge, the electronic cigarette can be normally used, the experience of the user is improved, and the quality problem of the electronic cigarette can be prevented from being mistakenly used by the user. By inserting the cigarette bullet, the cigarette stem exits from the shipping mode, the use habit of the user is not changed, and the user experience is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic circuit diagram of an electronic device according to an embodiment of the present application;

FIG. 2 is a schematic diagram of the system circuit and connections of FIG. 1;

FIG. 3 is a schematic diagram of the internal circuitry of the battery protection circuit of FIG. 1;

fig. 4 is a waveform diagram of the signal received by the shipping control pin CTL and the signal output by the first timing unit;

fig. 5 is a circuit schematic diagram of an electronic device according to a first embodiment and a fifth embodiment of the present application;

fig. 6 is a circuit schematic diagram of an electronic device of a first embodiment and a sixth embodiment of the present application;

fig. 7 is a circuit schematic diagram of an electronic device according to a second embodiment and a fourth embodiment of the present application;

fig. 8 is a circuit schematic diagram of an electronic device of a second embodiment and a fifth embodiment of the present application;

fig. 9 is a circuit schematic diagram of an electronic device according to a second embodiment of the present application;

Fig. 10 is a circuit schematic diagram of an electronic device according to a fifth embodiment of the present application;

fig. 11 is a circuit schematic of an electronic device according to a sixth embodiment of the present application;

fig. 12 is a circuit schematic of an electronic device according to a third embodiment of the present application;

fig. 13 is a circuit schematic diagram of an electronic device according to a third embodiment of the present application;

fig. 14 is a circuit schematic diagram of an electronic device according to a seventh embodiment of the present application;

FIG. 15 is a schematic circuit diagram of a first timing unit of the present application;

fig. 16 is a circuit schematic of the electronic device of fig. 1 in combination with fig. 2.

Description of the figure:

the battery protection circuit 100, the system circuit 200, the battery 300, the power supply pin VDD, the power ground pin GND, the system ground pin VM, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the first capacitor C1, the second capacitor C2, the first internal resistor Rn1, the second external resistor Rn2, the first switch unit K1, the second switch unit K2, the first external switch unit M1, the second external switch unit M2, the internal detection circuit INV1, the first status signal S1, the second status signal S2, the first NMOS transistor N1, the second NMOS transistor N2, the cartridge internal resistor Rd, the first input/output pin I/O-1, the second input/output pin I/O-2, the third input/output pin I/O-3, the C-capacitor, the R-resistor, the charge management IC 400, the battery voltage V1, the low level signal 0, the high level signal 1.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The terms "comprising" and "having" and any variations thereof, as used in the specification, claims and drawings, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or means is not limited to the list of steps or means but may include other steps or means not listed or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used for distinguishing between different objects and not for describing a particular sequential order.

The embodiment of the application provides an electronic device, for example, an electronic cigarette. Referring to fig. 1, a tobacco rod of the electronic cigarette includes a battery protection circuit 100, a system circuit 200, a battery 300, a thimble anode and a thimble cathode, the battery protection circuit 100 includes a power supply pin VDD electrically connected with the anode of the battery 300, a power ground pin GND electrically connected with the cathode of the battery 300, and a system ground pin VM electrically connected with the thimble cathode of the tobacco rod, and a voltage dividing resistor Rf may be further connected between the power ground pin GND and the thimble anode in series. The system circuit 200 comprises a first power pin P electrically connected with the positive electrode of the battery 300, a first ground pin G electrically connected with a system ground pin VM, and a first input/output pin I/O-1 electrically connected with the positive electrode of the ejector pin of the smoke rod, and a second input/output pin I/O-2 electrically connected with the battery protection circuit 100; the battery protection circuit 100 plays a role of protecting the battery 300, for example, when the battery 300 is overcharged or overdischarged; since how the battery protection circuit 100 protects the battery 300 from overcharge and overdischarge is a common technical means in the art, the description thereof is omitted herein. In this embodiment, the number of the batteries 300 may be one or more, and when the batteries are plural, the batteries may be connected in parallel or in series-parallel; the battery 300 is preferably a lithium battery, the capacity of the battery 300 is 900mAH-2000mAH, preferably, the capacity of the battery 300 is 1000mAH-1200mAH, and the volume and the capacity of the battery 300 are suitable at this time, so that the battery 300 can be conveniently arranged in a tobacco rod of an electronic cigarette. However, since the capacity of the battery 300 is small, how to maintain the electric power of the battery 300 for a long time becomes an important subject. In this embodiment, the battery protection circuit 100 is a technology commonly used in the field of integrated circuits, and is intended to combine a plurality of integrated circuits with specific functions on a chip to form a system or product, which includes a completed hardware system and embedded software carried thereby. The battery protection circuit 100 has significant advantages in various aspects such as performance, cost, power consumption, reliability, life cycle and range of use; in the present embodiment, part of the circuits integrated inside the battery protection circuit 100, such as resistors and capacitors, may also be externally connected to the system circuit 200. In this embodiment, a first resistor R1 and a first capacitor C1 are further disposed between the battery 300 and the battery protection circuit 100, and the first resistor R1 and the first capacitor C1 are configured for voltage stabilizing filtering. The capacitor C may not be provided between the battery 300 and the battery protection circuit 100. In addition, in other embodiments of the present application, other circuits or electronic components may be provided between the battery 300 and the battery protection circuit 100.

In this embodiment, referring to fig. 2, the positive electrode of the ejector pin is further electrically connected to the first end of the first external switch unit M1, the second end of the first external switch unit M1 is electrically connected to the second external resistor Rn2 and then connected to the power supply pin VDD, the control end of the first external switch unit M1 is electrically connected to the third input/output pin I/O-3 of the system circuit 200, the system circuit 200 controls the on and off of the first external switch unit M1 through the third input/output pin, and the first external switch unit M1 is a MOS tube, for example, an NMOS tube or a PMOS tube.

When the cartridge is connected to the tobacco rod, the internal resistance Rd of the cartridge is connected between the positive electrode of the ejector pin and the negative electrode of the ejector pin, the system circuit 200 controls the first external switch unit M1 to be conducted, and the system circuit 200 detects that the input voltage of the I/O-1 end of the first input/output pin is as follows:v1 represents the voltage value of the positive electrode of the battery. The resistance value of the internal resistance Rd of the cartridge is usually very small and is obviously smaller than that of the second external resistance Rn2, so that the detected input voltage is obviously smaller than the voltage value V1 of the positive electrode of the battery and is close to the vicinity of zero voltage.

When the cartridge is separated from the cigarette rod, the system circuit 200 detects that the input voltage of the first input/output pin I/O-1 is close to the battery anode voltage V1, the system circuit 200 detects that the cartridge is pulled out of the cigarette rod according to the change of the input voltage of the first input/output pin I/O-1 end, after waiting for a preset time T, the system circuit 200 inputs a signal for entering shipping to the battery protection circuit 100 through the second input/output pin I/O-2, and the battery protection circuit 100 controls the cigarette rod to enter the shipping mode after receiving the shipping signal sent by the system circuit 200.

And after the system circuit detects the voltage change of the first input and output pins, the system circuit inputs a shipping signal to the battery protection circuit through the second input and output pins, and the battery protection circuit controls the tobacco rod to enter a shipping mode. Other circuit implementations are also possible, and the first external switch unit M1 and the second external resistor Rn2 may be provided in the system circuit.

In this embodiment, referring to fig. 3, the battery protection circuit 100 includes a first switch unit K1, an internal detection circuit INV1 and a second switch unit K2, a system ground pin VM of the battery protection circuit 100 is electrically connected to a first end of the first switch unit K1, a second end of the first switch unit K1 is electrically connected to the first internal resistance Rn1 and then is connected to the power supply pin VDD, the system ground pin VM is also electrically connected to the first ends of the internal detection circuit INV1 and the second switch unit K2, and a second end of the second switch unit K2 is electrically connected to the power supply pin GND of the battery protection circuit 100;

when the smoke rod is in the shipping mode, the second switch unit K2 is disconnected, the system grounding pin VM is disconnected with the power supply grounding pin GND, so that the voltage of the system grounding pin VM is pulled up to be close to the battery voltage by the first internal resistance Rn1, the voltage of the system grounding pin VM is detected to be close to the changed battery voltage by the internal detection circuit INV1, the first state signal S1 is output by the output end SS1 of the internal detection circuit INV1, and the first state signal S1 is a logic low level signal 0.

When the cartridge is connected with the tobacco stem, the internal resistance Rd of the cartridge and the voltage dividing resistor Rf are connected in series between the system ground pin VM and the power ground pin GND to form a loop, and the voltage of the power supply pin VDD is close to the battery voltage V1, so that the detected voltage of the system ground pin VM is:in general, the resistance value of the internal resistance Rd of the cartridge is very small and is significantly smaller than the resistance value of the first internal resistance Rn1, and the resistance values of the first internal resistance Rn1 and the voltage dividing resistor Rf may be set, for example, the resistance values of the two are close, or the voltage dividing resistor Rf is smaller than the first internal resistance Rn, so that the detected input voltage is significantly smaller than the battery voltage V1, including a voltage value smaller than V1/2, or smaller. Thus, the internal detection circuit INV1 detects that the voltage variation of the system ground pin VM is lower than the preset voltage threshold of the internal detection circuit INV1, triggering the internal detection circuitThe state of the circuit INV1 is inverted to output a second state signal S2, the second state signal S2 is a logic high level signal 1, and the battery protection circuit 100 controls the tobacco stem to exit the shipping mode according to the second state signal S2.

In this embodiment, as shown in fig. 1, the battery protection circuit 100 may further include a shipping control pin CTL. The shipping control pin CTL is for electrical connection with the second input/output I/O-2 of the system circuit 200, and the battery protection circuit 100 receives a first signal into the shipping mode through the shipping control pin CTL. In the present embodiment, the number of shipping control pins CTL is one. However, the present application is not limited thereto, and in other embodiments of the present application, the number of shipping control pins CTL may be plural. The battery protection circuit 100 further includes an overcharge voltage protection unit, an overdischarge voltage protection unit, a discharge overcurrent protection unit, a reference voltage generation unit, a frequency generation unit, and a wake-up unit, and after entering the shipping mode, the battery 300 stops supplying power to the battery protection circuit 100 except the wake-up unit or the internal detection unit INV 1. The wake-up unit is a charging detection unit, and when the charging detection unit detects a charging signal, the tobacco stem also exits from the shipping mode.

In this embodiment, the first signal is a digital code signal, which is pre-agreed when the battery protection circuit 100 and the system circuit 200 are designed, and when the shipping control pin CTL receives the code signal, the battery protection circuit 100 generates the shipping control signal to enter the shipping mode. For example, the first signal includes two periods of time: the first period is a high level signal, the second period is a predetermined number of pulse signals, where the high level signal is used to trigger the corresponding element of the battery protection circuit 100 to activate, for example, tell the corresponding element of the battery protection circuit 100 to prepare for counting or counting, then count or count (for example, different pulse durations) the received pulse signals by the corresponding element of the battery protection circuit 100, when the number of pulses meets the preset requirement, the battery protection circuit 100 generates a shipping control signal, and when the number of pulses does not meet the preset requirement, the corresponding element of the battery protection circuit 100 returns to the state where the activation is not started. Since the first signal is a coded signal of the protocol of the battery protection circuit 100 and the system circuit 200, the specific form of the first signal is not limited, and any complex code or simple code may be used, so long as the first signal is a coded signal of the battery protection circuit 100 and the system circuit 200, which is well-agreed in advance, the battery protection circuit 100 can recognize the first signal.

In this embodiment, the overcharge protection unit is used to protect the battery 300 when the battery voltage is detected to be too high during the charging process of the battery 300, for example, stop charging the battery 300, etc., so as to prevent the battery 300 from being damaged or causing a safety problem.

In this embodiment, the over-discharge voltage protection unit is configured to protect the battery 300 when the battery 300 is detected to have an excessively low battery voltage during the discharging process, for example, to control the battery 300 to perform only a minimum discharging process, and generally stop the power supply to the system circuit inside the tobacco stem and stop the power supply to the circuit of the battery protection circuit 100 except the charging detection unit, so as to prevent the battery 300 from being permanently damaged due to the excessive discharging process.

In this embodiment, the discharge overcurrent protection unit is configured to protect the battery 300 when an excessive discharge current is detected during the discharging process of the battery 300, for example, the battery 300 stops discharging, so as to prevent the battery 300 from being permanently damaged or causing a safety problem due to the excessive discharge current.

In the present embodiment, the reference voltage generating unit is used to generate the reference voltage required by the battery protection circuit 100, and the frequency generating unit is used to generate different frequencies. In this embodiment, the overcharge voltage protection unit, the overdischarge voltage protection unit, the discharge overcurrent protection unit, the reference voltage generation unit, and the frequency generation unit are conventional circuits in the art, and will not be described herein.

In this embodiment, the wake-up unit is a charging detection unit, and is configured to detect whether the tobacco stem is connected to the power supply through the charger to charge the battery 300, and when the tobacco stem is connected to the power supply through the charger, the charging detection unit detects a charging signal to charge the battery 300. In this embodiment, if the battery 300 is protected by the overdischarge voltage protection unit, and the charging detection unit detects the charging signal at this time, the overdischarge voltage protection of the battery 300 is exited, that is, the system circuit inside the tobacco stem is normally powered again and the battery protection circuit 100 is normally powered.

In this embodiment, the wake-up unit is continuously powered by the battery 300 during the shipping mode, and the wake-up unit may be used to cause the battery protection circuit 100 to exit the shipping mode, which is one embodiment of causing the tobacco stem to exit the shipping mode. Since the wake-up unit is a charge detection circuit, which is an inherent circuit of the battery protection circuit 100, the design can save cost. In this embodiment, when the tobacco rod is charged, the charging detection circuit detects the charging signal, and the battery protection circuit 100 automatically exits the shipping mode, and the battery 300 can be used after the cartridge is inserted into the tobacco rod and started up because the electric quantity of the battery can be maintained for a long time. In addition, in other embodiments of the present application, the wake-up unit may not be a charging detection circuit, but may be another hardware circuit specifically used to make the battery protection circuit 100 exit from the shipping mode, and those skilled in the art may perform circuit design according to specific requirements.

In this embodiment, when the electronic cigarette needs long-distance transportation or long-time storage, the battery protection circuit 100 of the cigarette rod can enter the shipping mode, and can save the electric quantity of the battery 300 in a large amount, and in the shipping mode, most of the battery protection circuit 100 is stopped to supply power, so that the battery 300 only needs to supply power to a few circuit units such as the internal detection circuit INV1 of the battery protection circuit 100, the electric quantity consumption of the battery 300 is further reduced, the current consumption of the cigarette rod can be reduced, the current consumption can be reduced to several nA/h, the electric quantity retention time of the battery 300 can be prolonged, even if the capacity of the battery 300 is smaller, the electric quantity of the battery 300 can be kept for half a year to a year in the shipping mode, and after the user takes the electronic cigarette, the user only needs to insert the cigarette cartridge, the battery protection circuit 100 can exit the shipping mode, and the electronic cigarette can be normally used, because the battery also keeps more stored electric quantity and does not need to be charged, and the user experience is prevented from being mistakenly used as the electronic cigarette.

There are several ways of extracting the cartridge from the stem into the shipping mode, each of which is described below. Of course, the manner of implementing the smoke bar into the shipping mode is not limited to the following, and in other embodiments of the present application, those skilled in the art may also provide other conventional circuits to implement the smoke bar into the shipping mode.

First embodiment

In an embodiment of the present application, please refer to fig. 1, fig. 2, fig. 5, fig. 6, fig. 10, and fig. 11. When the system circuit 200 detects that the cartridge removal time is greater than or equal to the predetermined time T, the tobacco rod enters the shipping mode. Specifically, as shown in fig. 1 and fig. 2, the positive electrode and the negative electrode of the thimble of the cigarette rod are used for being electrically connected with the cigarette cartridge, the system grounding pin VM is electrically connected with the negative electrode of the thimble, the system circuit 200 comprises a first power pin P electrically connected with the positive electrode of the battery 300, a first grounding pin G electrically connected with the system grounding pin VM, and a first input/output pin I/O-1 electrically connected with the positive electrode of the thimble of the cigarette rod, and a second input/output pin I/O-2 electrically connected with the shipping pin CTL of the battery protection circuit 100; the positive pole of the thimble is also electrically connected with the first end of the first external switch unit M1, the second end of the first external switch unit M1 is electrically connected with the second external resistor Rn2 and then is connected with the power supply pin VDD, the control end of the first external switch unit M1 is electrically connected with the third input/output pin I/O-3 of the system circuit 200, the system circuit 200 controls the on and off of the first external switch unit M1 through the third input/output pin, and the first external switch unit is a MOS tube, such as an NMOS tube or a PMOS tube. The voltage dividing resistor Rf or the switching tubes can be connected in series between the power ground pin GND and the positive electrode of the thimble, the number of the switching tubes can be one or more, the switching tubes are MOS tubes, such as NMOS tubes or PMOS tubes, and the NMOS tubes are taken as an example in the embodiment; as shown in fig. 5 or fig. 6, when an NMOS tube is connected in series between the power ground pin GND and the positive electrode of the ejector pin, the drain electrode of the first NMOS tube N1 is electrically connected to the positive electrode of the ejector pin, the source electrode of the first NMOS tube N1 is electrically connected to the power ground pin GND, and the gate electrode of the first NMOS tube N1 is electrically connected to the system ground pin VM; when two NMOS tubes are connected in series between the power ground pin GND and the positive pole of the ejector pin, a first NMOS tube N1 and a second NMOS tube N2 are connected, the source electrode of the first NMOS tube N1 is electrically connected with the source electrode of the second NMOS tube N2, the drain electrode of the first NMOS tube N1 is electrically connected with the positive pole of the ejector pin, the drain electrode of the second NMOS tube N2 is electrically connected with the power ground pin GND, and the joint of the grid electrode of the first NMOS tube N1 and the grid electrode of the second NMOS tube N2 is electrically connected with the system ground pin VM. In this embodiment, the switching transistors may be integrated into the battery protection circuit 100, and the number of the switching transistors may be one or more, and the switching transistors may be MOS transistors, for example, NMOS transistors or PMOS transistors, which are taken as an example in this embodiment; as shown in fig. 10, when one NMOS transistor is integrated into the battery protection circuit 100, a first NMOS transistor N1 is electrically connected between the power ground pin GND and the detection pin AT, the drain electrode of the first NMOS transistor N1 is electrically connected to the detection pin AT, the source electrode is electrically connected to the power ground pin GND, and the gate electrode is electrically connected to the system ground pin VM after passing through the fourth resistor R4; as shown in fig. 11, when two NMOS transistors are integrated into the battery protection circuit 100, two NMOS transistors are connected in series between the power ground pin GND and the detection pin AT, wherein the source of the first NMOS transistor N1 is electrically connected to the source of the second NMOS transistor N2, the drain of the first NMOS transistor N1 is electrically connected to the detection pin AT, the drain of the second NMOS transistor N2 is electrically connected to the power ground pin GND, and the joint between the gate of the first NMOS transistor N1 and the gate of the second NMOS transistor N2 is electrically connected to the system ground pin VM after passing through the fourth resistor R4. The power supply pin VDD and the power ground pin GND of the battery protection circuit 100 are electrically connected with the positive electrode and the negative electrode of the battery 300 respectively, and a first resistor R1 and a first capacitor C1 are further arranged between the battery 300 and the battery protection circuit 100, and the first resistor R1 and the first capacitor C1 are arranged for filtering. In addition, a capacitor may not be provided between the battery 300 and the battery protection circuit 100, or other circuits or electronic components may be provided between the battery 300 and the battery protection circuit 100.

When the cartridge is connected to the tobacco rod, the internal resistance Rd of the cartridge is connected between the positive electrode of the ejector pin and the negative electrode of the ejector pin, the system circuit 200 controls the first external switch unit M1 to be conducted, and the system circuit 200 detects that the input voltage of the I/O-1 end of the first input/output pin is as follows:v1 represents the voltage value of the positive electrode of the battery, and the system circuit 200 detects that the cartridge is connected to the stem according to the change of the input voltage at the I/O-1 end of the first input/output pin.

When the cartridge is separated from the stem, the system circuit 200 detects that the input voltage of the first input/output pin I/O-1 is close to the battery positive voltage V1, the system circuit 200 detects that the cartridge is pulled out from the stem according to the change of the input voltage of the first input/output pin I/O-1, and after waiting for the predetermined time T, the system circuit 200 inputs a first signal entering the shipping mode to the battery protection circuit 100 through the second input/output pin I/O-2, and specific forms of the first signal are various, for example, including a pulse signal or a continuous high level signal or a continuous low level signal or a combination of these signals, which is not limited herein; in this embodiment, taking a continuous high level signal as an example, the battery protection circuit 100 further includes a first timing unit and a resistor R, as shown in fig. 15, where the shipping control pin CTL defaults to a low level, in this embodiment, the shipping control pin CTL is grounded via the resistor R to achieve the low level, the first timing unit outputs a low level signal under a general condition, and the shipping control pin CTL is electrically connected to the first timing unit. As shown in fig. 4, when the shipping control pin CTL receives a high level signal, that is, when the signal received by the shipping control pin CTL is changed from a low level to a high level, the first timing unit triggers the timing with a rising edge, when the duration of the high level signal received by the first timing unit is greater than or equal to a first predetermined period T1, the output signal of the first timing unit is changed from a low level to a high level, the high level signal at this time is the shipping control signal, and the battery protection circuit 100 controls the tobacco stem to enter the shipping mode after receiving the shipping control signal sent by the system circuit 200. The first predetermined period T1 is preset by the battery protection circuit 100, and the first predetermined period T1 is, for example, a period of 10 seconds, 5 seconds, 3 seconds, 1 second, or the like, so that false triggering can be prevented. In the present embodiment, the first timing unit is integrated inside the battery protection circuit 100. In addition, in other embodiments of the present application, the first timing unit may also be provided separately from the battery protection circuit 100.

In this embodiment, in the stage of factory inspection and acceptance of the tobacco rod, the shipping mode is required to be entered, a second signal is sent to the system circuit 200 through the positive pole of the ejector pin of the tobacco rod, after the system circuit 200 receives the signal, a first signal for entering the shipping mode is input to the battery protection circuit 100 through the second input/output pin I/O-2, and the battery protection circuit 100 controls the tobacco rod to enter the shipping mode after receiving the shipping control signal sent by the system circuit 200. Specifically, the tester sends the second signal to the first input/output pin I/O-1 of the system circuit 200 through the positive pin of the cigarette rod, where the second signal is an encoded signal of the battery protection circuit 100 and the system circuit 200 protocol, so that the specific form of the second signal is not limited, and a complex encoding or a simple encoding can be used, for example, the specific form of the second signal can be a pulse signal or a continuous high level signal or a continuous low level signal or a combination of these signals. In this embodiment, taking a high-low level signal as an example, when the system circuit 200 receives the second signal through the first input/output pin I/O-1, the system circuit 200 inputs the first signal entering the shipping mode to the battery protection circuit 100 through the second input/output pin I/O-2, in this embodiment, the first signal takes a continuous high level signal as an example, when the shipping control pin CTL receives the first signal as the high level signal, that is, when the signal received by the shipping control pin CTL changes from the low level to the high level, the first timing unit triggers timing with a rising edge, when the duration of the high level signal received by the first timing unit is greater than or equal to a first predetermined time period T1, the first timing unit outputs the signal from the low level to the high level, and the high level signal at this time is the shipping control signal, after the battery protection circuit 100 receives the shipping control signal sent by the system circuit 200, the control lever enters the shipping mode. The first predetermined period T1 is preset by the battery protection circuit 100, and the first predetermined period T1 is, for example, a period of 10 seconds, 5 seconds, 3 seconds, 1 second, or the like, so that false triggering can be prevented.

Second embodiment

In another embodiment of the present application, referring to fig. 2, 7, 8 and 9, when the system circuit 200 detects that the cartridge removal time is greater than or equal to the predetermined time T, the tobacco rod enters the shipping mode. The smoke rod comprises a battery 300, a system circuit 200 and a battery protection circuit 100, wherein the system circuit 200 comprises a first power supply pin P electrically connected with the positive electrode of the battery 300, a first ground pin G electrically connected with a system ground pin VM, a first input/output pin I/O-1 electrically connected with the positive electrode of a thimble, a second input/output pin I/O-2 electrically connected with a first end of a second resistor R2, a second end of the second resistor R2 electrically connected with a first end of a second capacitor C2 and also electrically connected with a control end of a second external switch unit M2, a second end of the second capacitor C2 is connected with a system ground pin VM, a first end of the second external switch unit M2 is electrically connected with a first end of a third resistor R3, a second end of the second external switch unit M2 is electrically connected with the system ground pin VM, a second end of the third resistor R3 is connected with the first resistor R1, and simultaneously connected with a power supply pin and the first capacitor C1; the ejector pin anode and the ejector pin cathode of the cigarette rod are electrically connected with the cigarette cartridge, the system ground pin VM is electrically connected with the ejector pin cathode, a divider resistor Rf or switching tubes can be connected in series between the power ground pin GND and the ejector pin anode, the number of the switching tubes can be one or more, and the switching tubes are MOS tubes, such as NMOS tubes or PMOS tubes. In this embodiment, an NMOS transistor is taken as an example; as shown in fig. 8, when an NMOS transistor is connected in series between the power ground pin GND and the positive electrode of the thimble, the drain electrode of the first NMOS transistor N1 is electrically connected to the positive electrode of the thimble, the source electrode of the first NMOS transistor N1 is electrically connected to the power ground pin GND, and the gate electrode of the first NMOS transistor N1 is electrically connected to the system ground pin VM; as shown in fig. 9, when two NMOS transistors are connected in series between the power ground pin GND and the positive electrode of the ejector pin, the source of the first NMOS transistor N1 is electrically connected to the source of the second NMOS transistor N2, the drain of the first NMOS transistor N1 is electrically connected to the positive electrode of the ejector pin, the drain of the second NMOS transistor N2 is electrically connected to the power ground pin GND, and the joint between the gate of the first NMOS transistor N1 and the gate of the second NMOS transistor N2 is electrically connected to the system ground pin VM. The positive pole of the thimble is also electrically connected with the first end of the first external switch unit M1, the second end of the first external switch unit M1 is electrically connected with the second external resistor Rn2 and then is connected with the power supply pin VDD, the control end of the first external switch unit M1 is electrically connected with the third input/output pin I/O-3 of the system circuit 200, the system circuit 200 controls the on and off of the first external switch unit M1 through the third input/output pin, and the first external switch unit M1 is a MOS tube, such as an NMOS tube or a PMOS tube. The power supply pin VDD and the power ground pin GND of the battery protection circuit 100 are electrically connected to the battery 300, respectively, and a first resistor R1 and a first capacitor C1 are further disposed between the battery 300 and the battery protection circuit 100, and the first resistor R1 and the first capacitor C1 are disposed for filtering. In addition, a capacitor may not be provided between the battery 300 and the battery protection circuit 100, or other circuits or electronic components may be provided between the battery 300 and the battery protection circuit 100.

When the cartridge is connected to the tobacco rod, the internal resistance Rd of the cartridge is connected between the positive electrode of the ejector pin and the negative electrode of the ejector pin, the system circuit 200 controls the first external switch unit M1 to be conducted, and the system circuit 200 detects that the input voltage of the I/O-1 end of the first input/output pin is as follows:the battery voltage V1, usually the resistance value of the third resistor R3 is significantly smaller than the first resistor R1, so that the voltage after pull-down is also significantly lower than the battery voltage, which is beneficial to identifying such a significant change of the voltage before and after, and the system circuit 200 detects whether the cigarette rod is connected to the cartridge according to the change of the input voltage at the I/O-1 end of the first input/output pin.

When the cartridge is separated from the stem, the system circuit 200 detects that the input voltage of the first input/output pin I/O-1 is close to the battery positive voltage V1, the system circuit 200 detects that the cartridge is pulled out from the stem according to the change of the input voltage of the first input/output pin I/O-1, and after waiting for the predetermined time T, the system circuit 200 inputs a first signal entering the shipping mode to the battery protection circuit 100 through the second input/output pin I/O-2, and specific forms of the first signal are various, for example, including a pulse signal or a continuous high level signal or a continuous low level signal or a combination of these signals, which is not limited herein; in this embodiment, taking a continuous high level signal as an example, during the high level duration, the time that the high level passes through the second resistor R2 and the second capacitor C2 is longer than the over-discharge protection delay time, the second external switch unit M2 is controlled to be turned on, and the second external switch unit M2 may be a MOS transistor or a triode, at this time, the voltage of the power supply pin VDD is pulled down as follows: v1×r3/(r3+r1), where the battery voltage V1. When the voltage at the power supply pin VDD is smaller than the over-discharge protection voltage of the battery protection circuit 100 and reaches the over-discharge protection delay time, the battery protection circuit 100 controls the tobacco stem to enter the shipping mode.

In this embodiment, the second signal is sent to the system circuit 200 through the positive pole of the ejector pin of the tobacco rod, the system circuit 200 receives the signal and then inputs the first signal for entering the shipping mode to the battery protection circuit 100 through the second input/output pin I/O-2, and the battery protection circuit 100 controls the tobacco rod to enter the shipping mode after receiving the shipping control signal sent by the system circuit 200. Specifically, the tester sends a second signal to the first input/output pin I/O-1 of the system circuit 200 through the positive electrode of the ejector pin of the smoke rod, where the second signal is an encoded signal of the battery protection circuit 100 and the system circuit 200, so that the specific form of the second signal is not limited, and a complex encoding or a simple encoding can be used, for example, the specific form of the second signal can be a pulse signal or a continuous high level signal or a continuous low level signal or a combination of these signals. In this embodiment, taking a high-low level signal as an example, when the system circuit 200 receives the second signal through the first input/output pin I/O-1, the system circuit 200 inputs the first signal entering the shipping mode to the battery protection circuit 100 through the second input/output pin I/O-2, in this embodiment, taking a continuous high level signal as an example, during the duration of the high level, after the high level passes through the second resistor R2 and the second capacitor C2, the second external switch unit M2 is controlled to be turned on, and the third switch may be a MOS transistor or a triode, at this time, the voltage at the power supply pin VDD is: v1×r3/(r3+r1), where the battery voltage V1. When the voltage at the power supply pin VDD is smaller than the over-discharge protection voltage of the battery protection circuit 100 and reaches the over-discharge protection delay time, the battery protection circuit 100 controls the tobacco stem to enter the shipping mode.

Third embodiment

In another embodiment of the present application, referring to fig. 12 and 13, when the battery protection circuit 100 detects that the cartridge removal time is greater than or equal to the predetermined time T, the tobacco rod enters the shipping mode. Specifically, the ejector pin anode and the ejector pin cathode of the cigarette rod are used for being electrically connected with the cigarette cartridge, the system grounding pin VM is electrically connected with the ejector pin cathode, the battery protection circuit 100 comprises a power supply pin VDD electrically connected with the anode of the battery 300, a power supply grounding pin GND electrically connected with the cathode of the battery 300, and a system grounding pin VM and a detection pin AT, and the detection pin AT is electrically connected with the anode of the ejector pin; inside the battery protection circuit 100, a third switch unit M3 is connected in series between the detection pin AT and the power supply pin VDD, a control end of the third switch unit M3 is electrically connected with a sleep detection circuit, the sleep detection circuit intermittently controls on and off of the third switch unit M3, a switch tube may be further connected in series between the power ground pin GND and the positive pole of the ejector pin, and the number of switch tubes may be one or more, and the switch tubes are MOS tubes, for example, NMOS tubes or PMOS tubes. In this embodiment, an NMOS transistor is taken as an example;

as shown in fig. 12, the drain electrode of the first NMOS transistor N1 is electrically connected to the detection pin AT, the source electrode is electrically connected to the power ground pin GND, and the gate electrode is electrically connected to the system ground pin VM after passing through the fourth resistor R4;

As shown in fig. 13, when two NMOS transistors are integrated into the battery protection circuit 100, two NMOS transistors are connected in series between the power ground pin GND and the detection pin AT, wherein the source of the first NMOS transistor N1 is electrically connected with the source of the second NMOS transistor N2, the drain of the first NMOS transistor N1 is electrically connected with the detection pin AT, the drain of the second NMOS transistor N2 is electrically connected with the power ground pin GND, and the joint between the gate of the first NMOS transistor N1 and the gate of the second NMOS transistor N2 is electrically connected with the system ground pin VM after passing through the fourth resistor R4.

The power supply pin VDD and the power ground pin GND of the battery protection circuit 100 are electrically connected to the battery 300, respectively, and a first resistor R1 and a first capacitor C1 are further disposed between the battery 300 and the battery protection circuit 100, and the first resistor R1 and the first capacitor C1 are disposed for filtering. In addition, a capacitor may not be provided between the battery 300 and the battery protection circuit 100, or other circuits or electronic components may be provided between the battery 300 and the battery protection circuit 100.

When the cartridge is removed from the stem, the sleep detection circuit controls the third switch unit M3 to be turned on AT a fixed frequency, the voltage of the detection pin AT is pulled up to be the battery voltage V1, that is, the voltage of the thimble+ is the battery voltage V1, so as to determine that the cartridge has been removed from the stem, after waiting for the predetermined time T (the time T may be arbitrarily set according to the system, for example, 100ms-10S, or may be set for an arbitrary time above 10S), the sleep detection circuit controls the battery protection circuit 100 to enter the shipping mode, and the second switch unit K2 between the system ground pin VM and the power ground pin GND is disconnected.

The following modes of changing the state signal of the internal detection circuit INV1 of the battery protection circuit 100 to exit the shipping mode by changing the voltage signal received by the system ground pin (VM) of the battery protection circuit 100 for realizing the cigarette stick are described in the following embodiments respectively. Of course, the manner of changing the state signal of the internal detection circuit INV1 of the battery protection circuit 100 to exit from the shipment by changing the voltage signal received by the system ground pin (VM) of the battery protection circuit 100 for realizing the cigarette rod is not limited to the following, and in other embodiments of the present application, a person skilled in the art may further set other conventional circuits to change the voltage signal received by the system ground pin (VM) of the battery protection circuit 100 for realizing the cigarette rod, so that the state signal of the internal detection circuit INV1 of the battery protection circuit 100 is changed to exit from the shipment.

Fourth embodiment

In one embodiment of the present application, in which the stem exits the shipping mode by inserting a cartridge, please refer to fig. 1, 3, 7 and 16. Specifically, the thimble anode and the thimble cathode of the cigarette rod are used for being electrically connected with the cigarette bullet, the system grounding pin VM is electrically connected with the thimble cathode, and the voltage dividing resistor Rf is connected in series between the power supply grounding pin GND and the thimble anode; the power supply pin VDD and the power ground pin GND of the battery protection circuit 100 are electrically connected to the battery 300, respectively, and a first resistor R1 and a first capacitor C1 are further disposed between the battery 300 and the battery protection circuit 100, and the first resistor R1 and the first capacitor C1 are configured for voltage stabilizing filtering. In addition, a capacitor may not be provided between the battery 300 and the battery protection circuit 100, or other circuits or electronic components may be provided between the battery 300 and the battery protection circuit 100. As shown in fig. 2, the positive electrode of the ejector pin is further electrically connected to a first end of the first external switch unit M1, a second end of the first external switch unit M1 is electrically connected to the second external resistor Rn2 and then connected to the power supply pin VDD, a control end of the first external switch unit M1 is electrically connected to the third input/output pin I/O-3 of the system circuit 200, the system circuit 200 controls on and off of the first external switch unit M1 through the third input/output pin, and the first external switch unit M1 is a MOS tube, for example, an NMOS tube or a PMOS tube.

As shown in fig. 3, the battery protection circuit 100 includes a first switch unit K1, an internal detection circuit INV1 and a second switch unit K2, a system ground pin VM of the battery protection circuit 100 is electrically connected to a first end of the first switch unit K1, a second end of the first switch unit K1 is electrically connected to a first internal resistance Rn1 and then is connected to a power supply pin VDD, the system ground pin VM is also electrically connected to the first ends of the internal detection circuit INV1 and the second switch unit K2, and a second end of the second switch unit K2 is electrically connected to a power supply ground pin GND of the battery protection circuit 100; the internal circuit detection circuit may be a not gate, a schmitt trigger, or any form of detection circuit, but the application is not limited thereto, and a person skilled in the art may perform circuit design according to specific requirements, and the internal detection circuit of the present embodiment uses a not gate as an example.

When the tobacco rod is in the shipping mode, the second switch unit K2 between the system ground pin VM and the power ground pin GND is disconnected, that is, the system ground pin VM and the power ground pin GND are disconnected, so that the first internal resistance Rn1 pulls up the voltage of the system ground pin VM to be close to the battery voltage V1, the internal detection circuit INV1 detects the voltage change of the system ground pin VM and outputs the first state signal S1, for example, the internal detection circuit INV1 outputs the first state signal S1 as 0, that is, the not gate outputs the first state signal as a logic low level signal.

When the cartridge is connected to the stem, the internal resistance Rd and the voltage dividing resistor Rf of the cartridge are connected in series between the system ground pin VM and the power ground pin GND to form a loop, and the voltage at the power supply pin VDD is the battery voltage V1, so that the detected voltage vc=v1 (rf+rd)/(rf+rd+rn1) at the system ground pin VM, the resistance value of the internal resistance Rd of the cartridge is usually very small and is significantly smaller than the resistance value of the first internal resistance Rn1, and the resistance values of the first internal resistance Rn1 and the voltage dividing resistor Rf may be set, for example, the resistance values of the first internal resistance Rn1 and the voltage dividing resistor Rf are close to each other, or the voltage dividing resistor Rf is smaller than the first internal resistance Rn, so that the detected input voltage is significantly smaller than the battery voltage V1, including a voltage value smaller than V1/2, or smaller. When the internal detection circuit INV1 detects that the voltage of the system ground pin VM is lower than the preset threshold of the internal detection circuit INV1, for example, the preset threshold is smaller than V1/2, the state of the internal detection circuit INV1 is triggered to turn over and the second state signal S2 is output, the preset threshold is a threshold where the state signal of the internal detection circuit INV1 changes, for example, the internal detection circuit INV1 outputs the second state signal S2 as 1, i.e., the not gate outputs the second state signal as a logic high level signal, the battery protection circuit 100 receives the state of the output of the internal detection circuit INV1 from the first state 0 to the second state signal 1, and controls the tobacco rod to exit from the shipping mode.

In this embodiment, the part of the circuit integrated inside the battery protection circuit 100 may be external, referring to fig. 7, the second input/output pin I/O-2 is electrically connected to the first end of the second resistor R2, the second end of the second resistor R2 is electrically connected to the first end of the second capacitor C2, and is also electrically connected to the control end of the second external switch unit M2, the second end of the second capacitor C2 is connected to the ground pin VM of the second external switch unit M2 is electrically connected to the first end of the third resistor R3, the second end of the second external switch unit M2 is electrically connected to the ground pin VM of the third resistor R3 is connected to the first resistor R1, and is also connected to the power supply pin VDD and the first capacitor C1; the ejector pin anode and the ejector pin cathode of the tobacco rod are used for being electrically connected with the tobacco cartridge, the system grounding pin VM is electrically connected with the ejector pin cathode, and a divider resistor Rf is connected in series between the power supply grounding pin GND and the ejector pin anode;

when the tobacco rod is in the shipping mode, the second switch unit K2 between the system ground pin VM and the power ground pin GND is disconnected, that is, the system ground pin VM and the power ground pin GND are disconnected, so that the first internal resistance Rn1 pulls up the voltage of the system ground pin VM to be close to the battery voltage, the internal detection circuit INV1 detects that the voltage of the system ground pin VM changes to the battery voltage and outputs the first state signal S1, for example, the internal detection circuit INV1 outputs the first state signal S1 as 0; the internal circuit detection circuit may be a NOT gate, a Schmitt trigger or any type of detection circuit, but the application is not limited thereto, and a person skilled in the art may perform circuit design according to specific requirements.

When the cartridge is connected with the stem, the internal resistance Rd and the voltage dividing resistor Rf of the cartridge are connected in series between the system ground pin VM and the power ground pin GND to form a loop, and the voltage at the power supply pin VDD is the battery voltage V1, so that the detected voltage vc=v1 (rf+rd)/(rf+rd+rn1) is present at the system ground pin VM, when the internal detection circuit INV1 detects that the voltage at the system ground pin VM is lower than the preset threshold of the internal detection circuit INV1, the state of the internal detection circuit INV1 is triggered to turn over and output the second state signal S2, the preset threshold is the threshold of the state signal of the internal detection circuit INV1, for example, the internal detection circuit INV1 outputs the second state signal S2 as 1, and the battery protection circuit 100 receives that the output state of the internal detection circuit INV1 turns over from the first state signal 0 to the second state signal 1, so as to control the stem to exit the shipping mode.

Fifth embodiment

Referring to fig. 5, 3 and 8, when the cartridge is inserted into the stem, the internal detection circuit INV1 of the battery protection circuit 100 detects that the voltage of the system ground pin VM is changed and outputs the second state signal S2, and the battery protection circuit 100 controls the stem to exit from the shipping mode according to the second state signal S2. Specifically, the ejector pin anode and the ejector pin cathode of the tobacco rod are used for being electrically connected with the tobacco cartridge, the system grounding pin VM is electrically connected with the ejector pin cathode, and a switching tube is connected in series between the power supply grounding pin GND and the ejector pin anode; the switch tube is a MOS tube, for example, a first NMOS tube N1, the drain electrode of the first NMOS tube N1 is electrically connected with the positive electrode of the thimble, the source electrode of the first NMOS tube N1 is electrically connected with the power ground pin GND, and the grid electrode of the first NMOS tube N1 is electrically connected with the system ground pin VM; the power supply pin VDD and the power ground pin GND of the battery protection circuit 100 are electrically connected to the battery 300, respectively, and a first resistor R1 and a first capacitor C1 are further disposed between the battery 300 and the battery protection circuit 100, and the first resistor R1 and the first capacitor C1 are disposed for filtering. In addition, a capacitor may not be provided between the battery 300 and the battery protection circuit 100, or other circuits or electronic components may be provided between the battery 300 and the battery protection circuit 100. The battery protection circuit 100 internally comprises a first switch unit K1, an internal detection circuit INV1 and a second switch unit K2, wherein a system grounding pin VM of the battery protection circuit 100 is electrically connected with a first end of the first switch unit K1, a second end of the first switch unit K1 is electrically connected with a first internal resistance Rn1 and then is connected with a power supply pin VDD, the system grounding pin VM is also electrically connected with an input end of the internal detection circuit INV1 and a first end of the second switch unit K2, and a second end of the second switch unit K2 is electrically connected with a power supply grounding pin GND of the battery protection circuit 100;

When the tobacco rod is in the shipping mode, the second switch unit K2 between the system ground pin VM and the power ground pin GND is disconnected, that is, the system ground pin VM and the power ground pin GND are disconnected, so that the first internal resistance Rn1 pulls up the voltage of the system ground pin VM to be close to the battery voltage V1, the internal detection circuit INV1 detects the voltage change of the system ground pin VM and outputs the first state signal S1, for example, the internal detection circuit INV1 outputs the first state signal S1 as 0, that is, the not gate outputs the first state signal as a logic low level signal. The internal circuit detection circuit may be a NOT gate, a Schmitt trigger or any type of detection circuit, but the application is not limited thereto, and a person skilled in the art may perform circuit design according to specific requirements.

When the cartridge is connected with the tobacco stem, the cartridge internal resistance Rd is connected between the drain electrode and the gate electrode of the first NMOS tube N1, a loop is formed between the system ground pin VM and the power supply ground pin GND, the discharge is performed through the cartridge internal resistance Rd and the first NMOS tube N1, the voltage Vc of the system ground pin VM decreases along with the discharge of the first NMOS tube N1, when the internal detection circuit INV1 detects that the voltage of the system ground pin VM is lower than the threshold voltage of the cut-off state of the NMOS tube, the voltage is the detection threshold value of the internal detection circuit INV1, and thus the state inversion of the internal detection circuit INV1 is triggered to output the second state signal S2, for example, the internal detection circuit INV1 outputs the second state signal S2 as 1, that is, the non-gate outputs the second state signal as a logic high level signal. The battery protection circuit 100 receives a high level signal that the output state of the internal detection circuit INV1 is inverted from the low level signal of the first state signal to the second state signal, and controls the tobacco rod to exit the shipping mode.

In this embodiment, referring to fig. 10, a switching tube connected in series between the power ground pin GND and the positive electrode of the ejector pin may be integrated into the battery protection circuit 100, where the switching tube is a MOS tube, for example, a first NMOS tube N1, and in the battery protection circuit 100, the first NMOS tube N1 is electrically connected between the power ground pin GND and the detection pin AT, the drain electrode of the first NMOS tube N1 is electrically connected to the detection pin AT, the source electrode is electrically connected to the power ground pin GND, and the gate electrode is electrically connected to the system ground pin VM after passing through the fourth resistor;

when the tobacco rod is in the shipping mode, the second switch unit K2 between the system ground pin VM and the power ground pin GND is disconnected, that is, the system ground pin VM and the power ground pin GND are disconnected, so that the first internal resistance Rn1 pulls up the voltage of the system ground pin VM to be close to the battery voltage V1, the internal detection circuit INV1 detects the voltage of the system ground pin VM and outputs the first state signal S1, for example, the internal detection circuit INV1 outputs the first state signal S1 as 0, that is, the not gate outputs the first state signal as a logic low level signal.

When the cartridge is connected with the tobacco stem, the cartridge internal resistance Rd is connected between the detection pin AT and the system grounding pin VM, a loop is formed between the system grounding pin VM and the power supply grounding pin GND, the discharge is performed through the cartridge internal resistance Rd and the first NMOS tube N1, the voltage of the system grounding pin VM decreases along with the discharge of the first NMOS tube N1, when the internal detection circuit INV1 detects that the voltage of the system grounding pin VM is lower than the threshold voltage of the cut-off NMOS tube, the voltage is the detection threshold value of the internal detection circuit INV1, and thus the state inversion of the internal detection circuit INV1 is triggered to output a second state signal S2, for example, the internal detection circuit INV1 outputs the second state signal S2 as 1, i.e. the non-gate outputs the second state signal as a logic high level signal. The battery protection circuit 100 receives the low level signal of the first state signal and the high level signal of the second state signal from the output state of the internal detection circuit INV1, and controls the tobacco rod to exit the shipping mode.

In this embodiment, the part of the circuit integrated inside the battery protection circuit 100 may be externally arranged, referring to fig. 8, the cigarette stick further includes a system circuit 200, the battery protection circuit 100 includes a power supply pin VDD electrically connected to the positive electrode of the battery 300, a power ground pin GND electrically connected to the negative electrode of the battery 300, and a system ground pin VM electrically connected to the negative electrode of the thimble of the cigarette stick. The system circuit 200 comprises a first power pin P electrically connected with the positive electrode of the battery 300, a first ground pin G electrically connected with a system ground pin VM, a first input/output pin I/O-1 electrically connected with the positive electrode of the thimble, and a second input/output pin I/O-2 electrically connected with the first end of a second resistor R2; the second end of the second resistor R2 is electrically connected with the first end of the second capacitor C2, and is also electrically connected with the control end of the second external switch unit M2, the second end of the second capacitor C2 is connected with the system grounding pin VM, the first end of the second external switch unit M2 is electrically connected with the first end of the third resistor R3, the second end of the second external switch unit M2 is electrically connected with the system grounding pin VM, the second end of the third resistor R3 is connected with the first resistor R1, and is also connected with the power supply pin VDD and the first capacitor C1; the ejector pin anode and the ejector pin cathode of the tobacco rod are used for being electrically connected with the tobacco cartridge, the system grounding pin VM is electrically connected with the ejector pin cathode, and a switching tube is connected in series between the power supply grounding pin GND and the ejector pin anode; the switch tube is a MOS tube, for example, a first NMOS tube N1, the drain electrode of the first NMOS tube N1 is electrically connected with the positive electrode of the thimble, the source electrode of the first NMOS tube N1 is electrically connected with the power ground pin GND, and the grid electrode of the first NMOS tube N1 is electrically connected with the system ground pin VM; the power supply pin VDD and the power ground pin GND of the battery protection circuit 100 are electrically connected to the battery 300, respectively, and a first resistor R1 and a first capacitor C1 are further disposed between the battery 300 and the battery protection circuit 100, and the first resistor R1 and the first capacitor C1 are disposed for filtering. In addition, a capacitor may not be provided between the battery 300 and the battery protection circuit 100, or other circuits or electronic components may be provided between the battery 300 and the battery protection circuit 100. The battery protection circuit 100 internally comprises a first switch unit K1, an internal detection circuit INV1 and a second switch unit K2, wherein a system grounding pin VM of the battery protection circuit 100 is electrically connected with a first end of the first switch unit K1, a second end of the first switch unit K1 is electrically connected with a first internal resistance Rn1 and then is connected with a power supply pin VDD, the system grounding pin VM is also electrically connected with the first ends of the internal detection circuit INV1 and the second switch unit K2, and a second end of the second switch unit K2 is electrically connected with a power supply grounding pin GND of the battery protection circuit 100;

When the tobacco rod is in the shipping mode, the second switch unit K2 between the system ground pin VM and the power ground pin GND is disconnected, that is, the system ground pin VM and the power ground pin GND are disconnected, so that the first internal resistance Rn1 pulls up the voltage of the system ground pin VM to be close to the battery voltage V1, the internal detection circuit INV1 detects that the voltage of the system ground pin VM changes to the battery voltage V1 and outputs the first state signal S1, for example, the internal detection circuit INV1 outputs the first state signal S1 as 0, that is, the not gate outputs the first state signal as a logic low level signal; the internal circuit detection circuit may be a NOT gate, a Schmitt trigger or any type of detection circuit, but the application is not limited thereto, and a person skilled in the art may perform circuit design according to specific requirements.

When the cartridge is connected with the tobacco stem, the cartridge internal resistance Rd is connected between the drain electrode and the gate electrode of the first NMOS tube N1, a loop is formed between the system ground pin VM and the power supply ground pin GND, the discharge is performed through the cartridge internal resistance Rd and the first NMOS tube N1, the voltage Vc of the system ground pin VM decreases along with the discharge of the first NMOS tube N1, when the internal detection circuit INV1 detects that the voltage of the system ground pin VM is lower than the threshold voltage of the cut-off state of the NMOS tube, the voltage is the detection threshold value of the internal detection circuit INV1, and thus the state inversion of the internal detection circuit INV1 is triggered to output the second state signal S2, for example, the internal detection circuit INV1 outputs the second state signal S2 as 1, that is, the non-gate outputs the second state signal as a logic high level signal. The battery protection circuit 100 receives the signal that the output state of the internal detection circuit INV1 is inverted from the first state low level signal to the second state signal high level signal, and controls the tobacco rod to exit the shipping mode.

In this embodiment, a switching tube connected in series between the power ground pin GND and the positive electrode of the ejector pin may be integrated into the battery protection circuit 100, and the switching tube is a MOS tube, for example, the first NMOS tube N1, which is not described herein.

Sixth embodiment

Referring to fig. 6, 3 and 9, when the cartridge is inserted into the stem, the internal detection circuit INV1 of the battery protection circuit 100 detects that the voltage of the system ground pin VM is lower than the threshold voltage detected by the internal detection circuit INV1 and outputs the second state signal S2, and the battery protection circuit 100 controls the stem to exit from the shipping mode according to the second state signal S2. Specifically, the ejector pin anode and the ejector pin cathode of the tobacco rod are used for being electrically connected with the tobacco cartridge, the system grounding pin VM is electrically connected with the ejector pin cathode, and a switching tube is connected in series between the power supply grounding pin GND and the ejector pin anode; the switch tube comprises two MOS tubes connected in series, such as a first NMOS tube N1 and a second NMOS tube N2, wherein the source electrode of the first NMOS tube N1 is electrically connected with the source electrode of the second NMOS tube N2, the drain electrode of the first NMOS tube N1 is electrically connected with the positive electrode of the ejector pin, the drain electrode of the second NMOS tube N2 is electrically connected with the power supply grounding pin GND, and the joint of the grid electrode of the first NMOS tube N1 and the grid electrode of the second NMOS tube N2 is electrically connected with the system grounding pin VM; the power supply pin VDD and the power ground pin GND of the battery protection circuit 100 are electrically connected to the battery 300, respectively, and a first resistor R1 and a first capacitor C1 are further disposed between the battery 300 and the battery protection circuit 100, and the first resistor R1 and the first capacitor C1 are disposed for filtering. In addition, a capacitor may not be provided between the battery 300 and the battery protection circuit 100, or other circuits or electronic components may be provided between the battery 300 and the battery protection circuit 100. The battery protection circuit 100 internally comprises a first switch unit K1, an internal detection circuit INV1 and a second switch unit K2, wherein a system grounding pin VM of the battery protection circuit 100 is electrically connected with a first end of the first switch unit K1, a second end of the first switch unit K1 is electrically connected with a first internal resistance Rn1 and then is connected with a power supply pin VDD, the system grounding pin VM is also electrically connected with an input end of the internal detection circuit INV1 and a first end of the second switch unit K2, and a second end of the second switch unit K2 is electrically connected with a power supply grounding pin GND of the battery protection circuit 100;

When the tobacco rod is in the shipping mode, the second switch unit K2 between the system ground pin VM and the power ground pin GND is disconnected, that is, the system ground pin VM and the power ground pin GND are disconnected, so that the first internal resistance Rn1 pulls up the voltage of the system ground pin VM to be close to the battery voltage V1, the internal detection circuit INV1 detects the voltage change of the system ground pin VM and outputs the first state signal S1, for example, the internal detection circuit INV1 outputs the first state signal S1 as 0, that is, the not gate outputs the first state signal as a logic low level signal; the internal circuit detection circuit may be a NOT gate, a Schmitt trigger or any type of detection circuit, but the application is not limited thereto, and a person skilled in the art may perform circuit design according to specific requirements.

When the cartridge is connected with the tobacco stem, the cartridge internal resistance Rd is connected between the drain electrode and the gate electrode of the first NMOS tube N1, a loop is formed between the system ground pin VM and the power supply ground pin GND, the voltage of the system ground pin VM decreases along with the discharge of the first NMOS tube N1 and the second NMOS tube N2 through the cartridge internal resistance Rd, the first NMOS tube N1 and the second NMOS tube N2, and when the internal detection circuit INV1 detects that the voltage of the system ground pin VM is lower than the threshold voltage of the cut-off NMOS tube, the voltage is the detection threshold of the internal detection circuit INV1, so as to trigger the state of the internal detection circuit INV1 to turn over and output the second state signal S2, for example, the internal detection circuit INV1 outputs the second state signal S2 as 1, that is, the non-gate outputs the second state signal as a logic high level signal. The battery protection circuit 100 receives the output state of the internal detection circuit INV1, and turns over from the first state signal low level signal to the second state signal high level signal, so as to control the tobacco rod to exit from the shipping mode.

In this embodiment, referring to fig. 11, two light-switching tubes connected in series between the power supply ground pin GND and the positive electrode of the ejector pin may be integrated into the battery protection circuit 100, where the source of the first NMOS tube N1 is electrically connected to the source of the second NMOS tube N2, the drain of the first NMOS tube N1 is electrically connected to the detection pin AT, the drain of the second NMOS tube N2 is electrically connected to the power supply ground pin GND, and the joint between the gate of the first NMOS tube N1 and the gate of the second NMOS tube N2 is electrically connected to the system ground pin VM through the fourth resistor R4.

When the cartridge is connected with the tobacco stem, the cartridge internal resistance Rd is connected between the detection pin and the system grounding pin, a loop is formed between the system grounding pin VM and the power supply grounding pin GND, the voltage of the system grounding pin VM is reduced along with the discharge of the first NMOS tube N1 and the second NMOS tube N2 through the discharge of the cartridge internal resistance Rd, the first NMOS tube N1 and the second NMOS tube N2, and when the internal detection circuit INV1 detects that the voltage of the system grounding pin VM is lower than the cut-off threshold voltage of the NMOS tube, the voltage is the detection threshold of the internal detection circuit INV1, so that the state of the internal detection circuit INV1 is triggered to turn over to output the second state signal S2, for example, the internal detection circuit INV1 outputs the second state signal S2 as 1, i.e. the non-gate outputs the second state signal as a logic high level signal. The battery protection circuit 100 receives the signal that the output state of the internal detection circuit INV1 is inverted from the first state low level signal to the second state signal high level signal, and controls the tobacco rod to exit the shipping mode.

In this embodiment, the part of the circuit integrated inside the battery protection circuit 100 may be externally arranged, referring to fig. 9, the cigarette stick further includes a system circuit 200 and the battery protection circuit 100, the battery protection circuit 100 includes a power supply pin VDD electrically connected to the positive electrode of the battery 300, a power ground pin GND electrically connected to the negative electrode of the battery 300, and a system ground pin VM electrically connected to the negative electrode of the thimble of the cigarette stick. The system circuit 200 comprises a first power pin P electrically connected with the positive electrode of the battery 300, a first ground pin G electrically connected with a system ground pin VM, a first input/output pin I/O-1 electrically connected with the positive electrode of the thimble, and a second input/output pin I/O-2 electrically connected with the first end of a second resistor R2; the second end of the second resistor R2 is electrically connected with the first end of the second capacitor C2, and is also electrically connected with the control end of the second external switch unit M2, the second end of the second capacitor C2 is connected with the system grounding pin VM, the first end of the second external switch unit M2 is electrically connected with the first end of the third resistor R3, the second end of the second external switch unit M2 is electrically connected with the system grounding pin VM, the second end of the third resistor R3 is connected with the first resistor R1, and is also connected with the power supply pin VDD and the first capacitor C1; the ejector pin anode and the ejector pin cathode of the tobacco rod are used for being electrically connected with the tobacco cartridge, the system grounding pin VM is electrically connected with the ejector pin cathode, the power supply grounding pin GND is connected with two communication poles of a switch tube in series between the ejector pin anode and the system grounding pin GND, the switch tube comprises two MOS tubes which are connected in series, for example, a first NMOS tube N1 and a second NMOS tube N2, a source electrode of the first NMOS tube N1 is electrically connected with a source electrode of the second NMOS tube N2, a drain electrode of the first NMOS tube N1 is electrically connected with the ejector pin anode, a drain electrode of the second NMOS tube N2 is electrically connected with the power supply grounding pin GND, and a joint electric connection part of a grid electrode of the first NMOS tube N1 and a grid electrode of the second NMOS tube N2 is electrically connected with the system grounding pin VM; the power supply pin VDD and the power ground pin GND of the battery protection circuit 100 are electrically connected to the battery 300, respectively, and a first resistor R1 and a first capacitor C1 are further disposed between the battery 300 and the battery protection circuit 100, and the first resistor R1 and the first capacitor C1 are disposed for filtering. In addition, a capacitor may not be provided between the battery 300 and the battery protection circuit 100, or other circuits or electronic components may be provided between the battery 300 and the battery protection circuit 100. The battery protection circuit 100 internally comprises a first switch unit K1, an internal detection circuit INV1 and a second switch unit K2, a system grounding pin VM of the battery protection circuit 100 is electrically connected with a first end of the first switch unit K1, a second end of the first switch unit K1 is electrically connected with a first internal resistance Rn1 and then is connected with a power supply pin VDD, the system grounding pin VM is also electrically connected with the first ends of the internal detection circuit INV1 and the second switch unit K2, and a second end of the second switch unit K2 is electrically connected with a power supply grounding pin GND of the battery protection circuit 100;

In this embodiment, two switching tubes connected in series between the power ground pin GND and the positive electrode of the ejector pin may be integrated into the battery protection circuit 100, where the switching tubes are MOS tubes, for example, a first NMOS tube N1 and a second NMOS tube N2, which are not described herein again.

Seventh embodiment

In another embodiment of the present application, referring to fig. 14, when the charger inserts the tobacco stem for charging, the internal detection circuit INV1 of the battery protection circuit 100 detects that the voltage of the system ground pin VM is changed and outputs the second state signal S2, and the battery protection circuit 100 controls the tobacco stem to exit from the shipping mode according to the second state signal S2. Specifically, the tobacco stem comprises a thimble anode and a thimble cathode, and is used for being electrically connected with the tobacco cartridge; the cigarette stem further comprises a system circuit 200, wherein the system circuit 200 comprises a first power pin P electrically connected with the positive electrode of the battery 300, a first ground pin G electrically connected with a system ground pin VM, and a first input/output pin I/O-1 electrically connected with the positive electrode of the thimble, and a second input/output pin I/O-2 electrically connected with a shipping control pin CTL of the battery protection circuit 100; the system grounding pin VM is electrically connected with the negative electrode of the thimble, the voltage dividing resistor Rf or the switching tube is connected in series between the power supply grounding pin GND and the positive electrode of the thimble, and the positive electrode and the negative electrode of the charging power supply port are electrically connected with the first power supply pin P and the system grounding pin; the power supply pin VDD and the power ground pin GND of the battery protection circuit 100 are electrically connected to the battery 300, respectively, and a first resistor R1 and a first capacitor C1 are further disposed between the battery 300 and the battery protection circuit 100, and the first resistor R1 and the first capacitor C1 are disposed for filtering. In addition, a capacitor may not be provided between the battery 300 and the battery protection circuit 100, or other circuits or electronic components may be provided between the battery 300 and the battery protection circuit 100. The battery protection circuit 100 internally comprises a first switch unit K1, an internal detection circuit INV1 and a second switch unit K2, wherein a system grounding pin VM of the battery protection circuit 100 is electrically connected with a first end of the first switch unit K1, a second end of the first switch unit K1 is electrically connected with a first internal resistance Rn1 and then is connected with a power supply pin VDD, the system grounding pin VM is also electrically connected with the first ends of the internal detection circuit INV1 and the second switch unit K2, and a second end of the second switch unit K2 is electrically connected with a power supply grounding pin GND of the battery protection circuit 100; the tobacco stem further includes a charge management IC for detecting the voltage of the battery 300 to ensure that the battery 300 is charged to a full charge voltage, which may be set according to the properties of the battery 300, for example, 4.2V.

When the charging power port is plugged into the charger for charging, the charging management IC400 outputs a current to charge the battery 300, and the charging voltage is not higher than the full charge voltage by 4.2V, according to kirchhoff' S law, the voltage vc=full charge voltage-battery voltage V1 of the system ground pin VM is equal to or lower than zero, and when the internal detection circuit INV1 detects that the voltage of the system ground pin VM is lower than the preset threshold of the internal detection circuit INV1, the state of the internal detection circuit INV1 is triggered to be inverted to output the second state signal S2, and the preset threshold is a threshold at which the state signal of the internal detection circuit INV1 is changed, for example, the internal detection circuit INV1 outputs the second state signal S2 as 1, i.e. the non-gate outputs the second state signal as a logic high level signal. The battery protection circuit 100 receives the signal that the output state of the internal detection circuit INV1 is inverted from the first state low level signal to the second state signal high level signal, and controls the tobacco rod to exit the shipping mode.

It should be understood that references herein to "a plurality" are to two or more. Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different manner from other embodiments, and identical and similar parts between the embodiments are referred to each other. For the device embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference is made to the description of the method embodiments for relevant points.

The foregoing disclosure is only illustrative of the preferred embodiments of the present application and is not intended to limit the scope of the claims herein, as the equivalent of the claims herein shall be construed to fall within the scope of the claims herein.

Claims

1. The cigarette stem comprises a battery and a battery protection circuit, and is characterized in that the battery protection circuit comprises a voltage acquisition end, and the battery protection circuit acquires voltage changes of the voltage acquisition end before and after a cigarette cartridge is connected with the cigarette stem so as to control the withdrawal from shipping;

the battery protection circuit comprises a power supply pin electrically connected with the positive electrode of the battery, a power supply grounding pin electrically connected with the negative electrode of the battery and a system grounding pin, and the voltage acquisition end is correspondingly the system grounding pin;

the cigarette rod comprises a thimble anode and a thimble cathode which are electrically connected with the cigarette bullet, the system grounding pin is electrically connected with the thimble cathode, and a divider resistor or an NMOS tube is connected in series between the power supply grounding pin and the thimble anode;

the battery protection circuit comprises one end of a first switch unit electrically connected with a system grounding pin, the other end of the first switch unit is electrically connected with a first internal resistor and then connected with the power supply pin of the power supply, and the system grounding pin is also electrically connected with an internal detection circuit;

in a shipping mode, the system grounding pin is disconnected from the power supply grounding pin, the first switch unit is connected, and the internal detection circuit detects the voltage of the system grounding pin and outputs a first state signal;

The cigarette bullet is connected with the tobacco stem, after the internal resistance of the cigarette bullet is connected in series between the system grounding pin and the power supply grounding pin, the system grounding pin and the voltage dividing resistor or the NMOS tube form a loop, the battery protection circuit detects that the cigarette bullet is connected with the tobacco stem, the tobacco stem is controlled to exit from a shipping mode, and the shipping mode is a low-power consumption mode.

2. The tobacco rod of claim 1, wherein the cartridge is coupled to the tobacco rod, the internal detection circuitry of the battery protection circuitry detects that the voltage of the system ground pin is below a preset threshold and outputs a second status signal, and the battery protection circuitry controls the tobacco rod to exit the shipping mode based on the second status signal.

3. The tobacco stem of claim 1, wherein a tobacco cartridge is connected to the tobacco stem, a tobacco cartridge internal resistance and a voltage dividing resistor are connected in series between the system ground pin and a power supply ground pin, the power supply ground pin voltage is a battery voltage, and thus a detection voltage vc=v1 (rf+rd)/(rf+rd+rn1) is present at the system ground pin, wherein the detection voltage Vc, the battery voltage V1, the voltage dividing resistor Rf, the tobacco cartridge internal resistance Rd, and the first internal resistor Rn1, the internal detection circuit detects the voltage of the system ground pin and outputs a second status signal, and the battery protection circuit controls the tobacco stem to exit from the shipping mode.

4. A smoke bar according to claim 3, wherein the internal detection circuit is a not gate, the voltage of the system ground pin is approximately equal to the battery voltage in the shipping mode of the smoke bar, the not gate outputting a first status signal as a logic low signal; and the smoke cartridge is connected with the smoke rod, the detection voltage of the system grounding pin is smaller than the battery voltage, and the NOT gate outputs a second state signal which is a logic high level signal.

5. The tobacco stem of claim 1, wherein the NMOS tube comprises a first NMOS tube, the drain of the first NMOS tube corresponds to the connected pole electrically connected to the positive pole of the pin, the source of the first NMOS tube corresponds to the connected pole electrically connected to the power ground pin, and the gate of the first NMOS tube corresponds to the control pole electrically connected to the system ground pin; the cigarette bullet is connected with the tobacco stem, battery protection circuit detects and perceives the system ground pin voltage variation, control the tobacco stem withdraws from shipping mode.

6. The tobacco rod of claim 5, wherein the cartridge is coupled to the tobacco rod, the internal detection circuitry of the battery protection circuitry detects that the voltage of the system ground pin is below a preset threshold and outputs a second status signal, and the battery protection circuitry controls the tobacco rod to exit the shipping mode based on the second status signal.

7. The tobacco rod of claim 5, wherein the tobacco rod comprises a tobacco rod,

the cigarette bullet is connected with the cigarette stem, the cigarette bullet internal resistance is connected between the drain electrode and the grid electrode of the first NMOS tube, so that discharge is carried out between the system grounding pin and the power supply grounding pin through the cigarette bullet internal resistance and the first NMOS tube, the voltage Vc of the system grounding pin is reduced along with the discharge of the first NMOS tube, and the internal detection circuit detects that the voltage of the system grounding pin is lower than a threshold value and outputs a second state signal; and the battery protection circuit controls the tobacco stems to exit from the shipping mode according to the second state signal.

8. The smoke bar of claim 7 wherein said internal detection circuit is a NOT gate, said smoke bar in shipping mode, said system ground pin voltage being approximately equal to battery voltage, said NOT gate outputting a first status signal as a logic low signal; and the smoke cartridge is connected with the smoke rod, the detection voltage of the system grounding pin is smaller than the battery voltage, and the NOT gate outputs a second state signal which is a logic high level signal.

9. The tobacco stem of claim 1, wherein the NMOS tubes comprise two NMOS tubes, wherein a source of a first NMOS tube is electrically connected to a source of a second NMOS tube, a drain of the first NMOS tube is corresponding to a communication electrode electrically connected to the positive electrode of the thimble, a drain of the second NMOS tube is corresponding to a communication electrode electrically connected to the power ground pin, and a control electrode electrically connected to the system ground pin is corresponding to a common electrical connection between a gate of the first NMOS tube and a gate of the second NMOS tube; the cigarette bullet is connected with the tobacco stem, battery protection circuit detects and perceives the system ground pin voltage variation, control the tobacco stem withdraws from shipping mode.

10. The wand of claim 9, wherein the cartridge is coupled to the wand, and wherein the internal detection circuitry of the battery protection circuitry detects that the voltage at the system ground pin is below a predetermined threshold to output a second status signal, and wherein the battery protection circuitry controls the wand to exit the shipping mode based on the second status signal.

11. The tobacco rod of claim 9 wherein the tobacco rod is a tobacco rod,

the cigarette bullet is connected with the cigarette stem, the cigarette bullet internal resistance is connected between the drain electrode and the grid electrode of the first NMOS tube, so that discharge is carried out between the system grounding pin and the power supply grounding pin through the cigarette bullet internal resistance, the first NMOS tube and the second NMOS tube, the voltage Vc of the system grounding pin is reduced along with the discharge of the first NMOS tube and the second NMOS tube, and the internal detection circuit detects that the voltage of the system grounding pin is lower than a threshold value and outputs a second state signal; and the battery protection circuit controls the tobacco stems to exit from the shipping mode according to the second state signal.

12. The smoke bar of claim 11 wherein said internal detection circuit is a NOT gate, said smoke bar in shipping mode, said system ground pin voltage being approximately equal to battery voltage, said NOT gate outputting a first status signal as a logic low signal; and the smoke cartridge is connected with the smoke rod, the detection voltage of the system grounding pin is smaller than the battery voltage, and the NOT gate outputs a second state signal which is a logic high level signal.

13. An electronic cigarette comprising a tobacco rod according to any one of claims 1 to 12.