CN112493548B

CN112493548B - Electronic cigarette, cartridge for electronic cigarette and key control chip

Info

Publication number: CN112493548B
Application number: CN202011445341.1A
Authority: CN
Inventors: 宋利军; 徐丹蓉
Original assignee: Xi'an Wenxian Semiconductor Technology Co ltd
Current assignee: Xi'an Wenxian Semiconductor Technology Co ltd
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2024-01-12
Anticipated expiration: 2040-12-11
Also published as: CN112493548A

Abstract

The invention discloses an electronic cigarette, a cartridge for the electronic cigarette and a key control chip. After the tobacco stem is correspondingly connected with the tobacco bullet, the main control module sends a signal to the control module to carry out key verification, the two-way switch is disconnected, the second switch control is controlled by the sending end of the main control module to send a signal to the control module through the positive driving electrode and the first electrode or the second electrode, and the control module carries out key verification after receiving the signal by the receiving end of the control module; after verification is effective, the control module sends a signal to the main control module for verification feedback, the second switching tube is connected, the bidirectional switch is controlled by the sending end of the control module, the signal is sent to the main control module through the first electrode or the second electrode and the positive driving electrode, and after the signal is received by the receiving end of the main control module, the main control module completes key verification. The invention prevents counterfeit and inferior cigarette bullet through key verification, has simple structure, is not limited by the polarity of the power supply of the cigarette rod, and is compatible with the existing electronic cigarette.

Description

Electronic cigarette, cartridge for electronic cigarette and key control chip

Technical Field

The invention relates to the technical field of electronic cigarettes, in particular to an electronic cigarette, a cartridge for the electronic cigarette and a key control chip.

Background

In the prior art, the electronic cigarette consists of a cigarette rod and a cigarette bullet, the cigarette rod and the cigarette bullet are combined for use, the cigarette rod can be used for a long time, the cigarette bullet is a disposable consumable, tobacco tar is arranged in the disposable consumable, and after the tobacco tar is consumed, the cigarette bullet can be discarded and is used in combination with the cigarette rod again.

The interface between tobacco stem and the cigarette bullet includes mechanical interface and electrical interface, and electrical interface is mainly two electrodes to the cigarette bullet power supply, and in the prior art, after tobacco stem and cigarette bullet combined, the two directly can carry out the power supply and connect and can cooperate the use. This provides a very realistic opportunity for various counterfeit cartridges, thereby greatly encroaching upon the market share of regular cartridges.

In order to realize the anti-counterfeiting of the cartridge, an information communication interface between the cartridge and the tobacco stem is required to be added in the electrical interface, and the electrical interface generally comprises a power supply connection end, a ground connection end, a signal connection end and the like. However, because the information communication interface is additionally arranged between the cigarette bullet and the cigarette stem, the interface further comprises a plurality of connecting ends, the electrical connection mode between the existing cigarette bullet and the cigarette stem is changed, the hardware cost of the interface is increased, the physical structures of the cigarette bullet and the cigarette stem are changed to be complex, the damage rate of the cigarette bullet and the cigarette stem is increased when the cigarette bullet and the cigarette stem are connected in a plugging mode, the universality is not strong, the existing electronic cigarette product cannot be compatible, and the satisfaction degree of the user consumption experience is reduced.

Disclosure of Invention

The invention mainly solves the technical problems of providing the electronic cigarette, the cigarette cartridge for the electronic cigarette and the key control chip, solving the problems that the cigarette cartridge and the cigarette stem of the electronic cigarette in the prior art are mutually and safely authenticated in a low-complexity and low-cost mode, the convenience and the safety of plugging electricity are realized, and the electronic cigarette is compatible with the structure of the existing electronic cigarette.

In order to solve the technical problems, the invention provides an electronic cigarette, which comprises a cigarette rod and a cigarette cartridge, wherein the cigarette rod comprises a battery, a positive driving electrode, a negative driving electrode and a main control module, a second switching tube is arranged between the positive electrode of the battery and the positive driving electrode, the second switching tube is connected or disconnected under the control of a transmitting end of the main control module, a receiving end of the main control module is electrically connected with the positive driving electrode, and a grounding end of the main control module is electrically connected with the negative driving electrode; the cigarette bullet comprises a first electrode, a second electrode and a control module, a two-way switch is arranged between the first electrode and the second electrode of the cigarette bullet, the control module comprises a first receiving end and a second receiving end which are respectively and electrically connected with the first electrode and the second electrode, and a transmitting end of the control module controls the two-way switch to be switched on or switched off; when the cigarette rod is correspondingly connected with the cigarette bullet for use, the positive driving electrode and the negative driving electrode of the cigarette rod are correspondingly connected with the first electrode and the second electrode of the cigarette bullet in an electric contact way respectively, or are correspondingly connected with the second electrode and the first electrode of the cigarette bullet in an electric contact way respectively; after the tobacco stem is correspondingly connected with the tobacco bullet, the two-way switch is disconnected, a transmitting end of the main control module transmits a verification signal, the verification signal controls the second switching tube to be connected or disconnected, the verification signal is transmitted to the control module through the positive driving electrode and the first electrode or the second electrode, and after the verification signal is received by a first receiving end or a second receiving end corresponding to the control module, the control module performs key verification; after verification is effective, the control module performs verification feedback to the main control module, the second switching tube is connected, the sending end of the control module sends a feedback signal, the feedback signal controls the two-way switch to be connected or disconnected, the feedback signal is transmitted to the main control module through the first electrode or the second electrode and the positive driving electrode, and after the feedback signal is received by the receiving end of the main control module, verification feedback is completed.

Preferably, the second switch tube in the tobacco stem is a PMOS tube or an NMOS tube.

Preferably, a second comparator is further arranged between the receiving end of the main control module in the tobacco rod and the positive driving electrode of the tobacco rod, the output end of the second comparator is electrically connected with the receiving end of the main control module, one input end of the second comparator inputs reference voltage, and the other input end of the second comparator is electrically connected with the positive driving electrode of the tobacco rod.

Preferably, the bidirectional switch comprises two electrically connected N-type MOS transistors or two electrically connected P-type MOS transistors.

Preferably, the bidirectional switch comprises a first control N-type MOS tube, a second control N-type MOS tube, a first comparator and an isolation N-type MOS tube, wherein a first input end of the first comparator is electrically connected with a first electrode, a second input end of the first comparator is electrically connected with a second electrode, an output end of the first comparator is divided into two paths, one path of output is directly and electrically connected with a grid electrode of the first control N-type MOS tube, the other path of output is electrically connected with a grid electrode of the second control N-type MOS tube after passing through a NOT gate, sources of the first control N-type MOS tube and the second control N-type MOS tube are electrically connected with a base electrode of the isolation N-type MOS tube, a drain electrode of the first control N-type MOS tube is electrically connected with a drain electrode of the isolation N-type MOS tube and is connected with a first electrode, a drain electrode of the second control N-type MOS tube is electrically connected with a source electrode of the isolation N-type MOS tube and is connected with a second electrode, and a transmitting end of the control module is electrically connected with a grid electrode of the isolation N-type MOS tube.

Preferably, the cartridge further comprises an internal power source electrically connected to the first electrode and the second electrode for supplying power to the control module.

The invention also provides a cigarette bullet for the electronic cigarette, which comprises a first electrode, a second electrode and a control module, wherein a bidirectional switch is further arranged between the first electrode and the second electrode of the cigarette bullet, the control module comprises a first receiving end and a second receiving end which are respectively and electrically connected with the first electrode and the second electrode, and a transmitting end of the control module controls the bidirectional switch to be switched on or switched off; when the control module receives a verification signal from the exterior of the cartridge to perform key verification, the two-way switch is turned off, the first electrode or the second electrode receives the verification signal from the exterior of the cartridge, and after the verification signal is received by the first receiving end or the second receiving end corresponding to the control module, the control module performs key verification; after verification is effective, the transmitting end of the control module transmits a feedback signal, the feedback signal controls the on or off of the two-way switch, and the feedback signal is transmitted to the outside of the cartridge through the first electrode or the second electrode.

The invention also provides a key control chip, which comprises a control module, a two-way switch, a first pin and a second pin, wherein the two-way switch comprises two access ends and a controlled end, the two access ends are respectively and electrically connected with the first pin and the second pin, the controlled end is electrically connected with a transmitting end of the control module, and the control module comprises a first receiving end and a second receiving end which are respectively and electrically connected with the first pin and the second pin; when the control chip receives the verification signal, the bidirectional switch is disconnected, the first pin or the second pin receives the signal from the outside and then inputs the signal to the control module through the first receiving end or the second receiving end, after the key control chip performs key verification, the sending end of the control module sends out a feedback signal, the feedback signal controls the bidirectional switch to be connected or disconnected, and then the feedback signal is sent out through the first pin or the second pin.

Preferably, the bidirectional switch comprises a first control N-type MOS tube, a second control N-type MOS tube, a first comparator and an isolation N-type MOS tube, wherein a first input end of the first comparator is electrically connected with a first pin, a second input end of the first comparator is electrically connected with the first pin, an output end of the first comparator is divided into two paths, one path of output is directly and electrically connected with a grid electrode of the first control N-type MOS tube, the other path of output is electrically connected with a grid electrode of the second control N-type MOS tube after passing through a NOT gate, sources of the first control N-type MOS tube and the second control N-type MOS tube are electrically connected with a base electrode of the isolation N-type MOS tube, a drain electrode of the first control N-type MOS tube is electrically connected with a drain electrode of the isolation N-type MOS tube and is connected with the first pin, a drain electrode of the second control N-type MOS tube is electrically connected with a source electrode of the isolation N-type MOS tube and is connected with the second pin, and a transmitting end of the control module is electrically connected with the grid electrode of the isolation N-type MOS tube.

Preferably, the control module further comprises an internal power supply electrically connected with the first pin and the second pin for supplying power to the control module.

The invention has the technical effects that: the invention discloses an electronic cigarette, a cartridge for the electronic cigarette and a key control chip. After the tobacco stem is correspondingly connected with the tobacco bullet, the main control module sends a signal to the control module to carry out key verification, the two-way switch is disconnected, the second switch control is controlled by the sending end of the main control module to send a signal to the control module through the positive driving electrode and the first electrode or the second electrode, and the control module carries out key verification after receiving the signal by the receiving end of the control module; after verification is effective, the control module sends a signal to the main control module for verification feedback, the second switching tube is connected, the bidirectional switch is controlled by the sending end of the control module, the signal is sent to the main control module through the first electrode or the second electrode and the positive driving electrode, and after the signal is received by the receiving end of the main control module, the main control module completes key verification. The counterfeit and inferior cigarette bullet is prevented through key verification, the realization structure is simple, the limitation of the polarity of a power supply of a cigarette rod is avoided, and the electronic cigarette is compatible with the existing electronic cigarette.

Drawings

FIG. 1 is a schematic diagram of the composition of an embodiment of an electronic cigarette according to the present invention;

fig. 2 is a schematic composition diagram of another embodiment of an electronic cigarette according to the present invention;

fig. 3 is a schematic diagram of the principle of operation of the tobacco rod and cartridge in the electronic cigarette according to the present invention;

FIG. 4 is a schematic diagram of the internal power supply composition in one embodiment of a cartridge in an electronic cigarette according to the present invention;

FIG. 5 is a schematic diagram of another internal power source composition in an embodiment of a cartridge in an electronic cigarette according to the present invention;

fig. 6 is a schematic diagram of the composition of another embodiment of an electronic cigarette according to the present invention;

FIG. 7 is an enlarged circuit diagram of the bi-directional switch of the embodiment of FIG. 6;

fig. 8 is a schematic diagram of another bi-directional switch assembly in an embodiment of a cartridge in an electronic cigarette according to the present invention;

fig. 9 is a schematic diagram of the composition of another embodiment of a cartridge in an electronic cigarette according to the invention;

fig. 10 is a schematic composition diagram of another embodiment of a cartridge in an electronic cigarette according to the present invention;

FIG. 11 is a schematic diagram illustrating the composition of an embodiment of a key control chip according to the present invention;

fig. 12 is a schematic diagram showing the constitution of another embodiment of a key control chip according to the present invention.

Detailed Description

In order that the invention may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, the electronic cigarette includes a cigarette rod and a cigarette cartridge, the cigarette rod includes a battery BAT, a positive driving electrode OUT, a negative driving electrode GND and a main control module ZK, a second switch tube K2 is disposed between the positive electrode of the battery BAT and the positive driving electrode OUT, the on or off of the second switch tube K2 is controlled by a transmitting end ZKU of the main control module ZK, the transmitting end ZKU is used for transmitting a signal to the outside of the cigarette rod, a receiving end ZKI of the main control module ZK is electrically connected with the positive driving electrode OUT, a receiving end ZKI is used for receiving a signal from the outside of the cigarette rod, a grounding end ZKD is electrically connected with the negative driving electrode GND, a power end ZKC of the main control module ZK is electrically connected with the positive electrode of the battery BAT, and the negative electrode of the battery BAT is electrically connected with the negative driving electrode GND.

The cigarette bullet includes atomizer WHQ, first electrode YD1, second electrode YD2 and control module MK, and first electrode YD1 and second electrode YD2 of cigarette bullet are connected to two power supply end electricity of atomizer WHQ, still are provided with bi-directional switch K1 between first electrode YD1 and the second electrode YD2 of cigarette bullet, control module includes first receiving end MIKA and second receiving end MIKB, is connected with first electrode YD1 and second electrode YD2 electricity respectively, the transmitting end MKU of control module MK controls bi-directional switch K1 to switch on or off, and this transmitting end MKU is used for to the outside transmission signal of cigarette bullet.

The second switching tube and the bidirectional switch are mainly realized by using the MOS tube as a main body, and mainly utilize the switching characteristic and the conduction characteristic of the MOS tube, wherein the second switching tube and the bidirectional switch comprise various realization modes of the MOS tube.

It should be further noted that, the first electrode and the second electrode are not distinguished by positive and negative polarities of the electrodes, that is, the first electrode may be connected to a positive voltage or may be grounded, and the second electrode may also be connected to a positive voltage or may be grounded, so that when the first electrode is connected to a positive voltage, the second electrode is grounded, or the second electrode is connected to a positive voltage, the first electrode is grounded correspondingly. Therefore, when the cartridge is connected with the cartridge, although the positive driving electrode and the negative driving electrode of the cartridge are two electrodes for distinguishing the positive electrode from the negative electrode, the first electrode and the second electrode in the cartridge do not need to be distinguished from each other, so that the problem of opposite electrode connection is not worried about when the two electrodes are connected, that is, the positive driving electrode and the negative driving electrode of the cartridge can be correspondingly connected with the first electrode and the second electrode of the cartridge, or the positive driving electrode and the negative driving electrode of the cartridge can be correspondingly connected with the second electrode and the first electrode of the cartridge. Therefore, the safety, reliability and convenience in use of the connection of the cigarette rod and the cigarette bullet can be ensured, and the damage to the cigarette bullet and the electronic cigarette caused by the wrong electrode connection can be avoided.

Further, when the cigarette rod is correspondingly connected with the cigarette cartridge, the positive driving electrode OUT and the negative driving electrode GND of the cigarette rod are correspondingly connected with the first electrode YD1 and the second electrode YD2 of the cigarette cartridge in an electric contact mode respectively, or correspondingly connected with the second electrode YD2 and the first electrode YD1 of the cigarette cartridge in an electric contact mode respectively.

After the tobacco rod is correspondingly connected with the tobacco bomb, the bidirectional switch K1 is disconnected, a transmitting end ZKU of the main control module ZK transmits a verification signal, the verification signal controls the second switching tube K2 to be conducted or disconnected, the verification signal is transmitted to the control module MK through the positive driving electrode OUT and the first electrode YD1 or the second electrode YD2, and after being received by a first receiving end MIKA or a second receiving end MIKB corresponding to the control module MK, the control module MK performs key verification; after verification is effective, the control module MK performs verification feedback to the master control module ZK, the second switching tube K2 is turned on, the transmitting end MKU of the control module MK sends a feedback signal, the feedback signal controls the two-way switch K1 to be turned on or off, the feedback signal is transmitted to the master control module ZK through the first electrode YD1 or the second electrode YD2 and the positive driving electrode OUT, and after the feedback signal is received by the receiving end ZKI of the master control module ZK, verification feedback is completed.

As can be seen from the embodiment shown in fig. 1, the key information interaction is realized by using the original power supply interfaces of the cigarette rod and the cigarette cartridge, and the bidirectional switch and the second switch tube are switches realized based on the MOS tube, and the switch tube has a smaller resistance value when being turned on, so that the bidirectional switch is connected in parallel to two ends of the atomizer WHQ, when the key information interaction is performed, the voltage generated by the battery power supply at the two ends of the atomizer is mainly used for driving the bidirectional switch, the current also mainly flows through the bidirectional switch, the atomizer itself does not generate large power consumption or generate atomization effect, because the current flowing through the atomizer is very small and short, and the voltage is mainly used for key verification in a very short time. If the verification is effective, the bidirectional switch is in a normally-open state, so that the power supply and heating of the atomizer are not affected. If the verification key is invalid, the second switch tube is in a normally open state, so that the battery cannot supply power to the cartridge. In addition, the two-way switch is arranged at two ends of the atomizer in a parallel connection mode, so that the connection mode of the atomizer is not required to be changed, and the two ends of the original atomizer can be connected with the circuits in parallel, and the circuit in the invention can be additionally arranged on the existing cartridge structure.

Preferably, in combination with fig. 2, the second switch tube K2 in the tobacco rod is a P-type MOS tube, a gate electrode of the P-type MOS tube is electrically connected to the transmitting end ZKU of the main control module ZK, a source electrode of the P-type MOS tube is electrically connected to the positive electrode of the battery BAT, and a drain electrode of the P-type MOS tube is electrically connected to the positive driving electrode OUT of the tobacco rod. When the transmitting terminal ZKU outputs a high voltage, the P-type MOS transistor is turned off between the gate and the source, so that the P-type MOS transistor is turned off between the drain and the source, and when the transmitting terminal ZKU outputs a low voltage, the P-type MOS transistor is turned on between the gate and the source, so that the P-type MOS transistor is turned on between the drain and the source. Therefore, it can be seen that when the transmitting end ZKU of the master control module ZK generates high voltage, the drain electrode and the source electrode of the P-type MOS transistor are disconnected, and the first electrode YD1 is electrically connected with the positive driving electrode OUT, and the other end of the atomizer is grounded, so that the voltage of the first electrode YD1 is 0, and the receiving end MKI input to the control module MK is 0 voltage, which can represent a signal of "0" or "1"; when the transmitting terminal ZKU of the main control module ZK generates low voltage, the drain electrode and the source electrode of the P-type MOS transistor are connected, and based on the electrical connection between the first electrode YD1 and the positive driving electrode OUT, the voltage of the first electrode YD1 approaches to the battery voltage, that is, a high voltage, so that the MKIA input to the first receiving terminal of the control module is the high voltage and can represent a signal "1" or "0", thereby transmitting the verification signal to the first receiving terminal MKIA of the control module MK.

Preferably, the second switch tube K2 in the tobacco rod may also be an N-type MOS tube, the gate of the N-type MOS tube is electrically connected to the transmitting end ZKU of the main control module ZK, the source of the N-type MOS tube is electrically connected to the positive electrode of the battery BAT, and the drain of the N-type MOS tube is electrically connected to the positive driving electrode OUT of the tobacco rod. When the transmitting terminal ZKU outputs a low voltage, the gate and the source of the N-type MOS transistor are turned off, so that the drain and the source of the N-type MOS transistor are also turned off, and when the transmitting terminal ZKU outputs a high voltage, the voltage is higher than the battery voltage, the gate and the source of the N-type MOS transistor are turned on, so that the drain and the source of the N-type MOS transistor are also turned on.

Preferably, the bidirectional switch K1 includes two electrically connected N-type MOS transistors, the two electrically connected N-type MOS transistors have the same characteristics, the drains of the two electrically connected N-type MOS transistors are also commonly connected together, the gates of the two electrically connected N-type MOS transistors are also electrically connected to the transmitting end of the control module, the source of one N-type MOS transistor is electrically connected to the first electrode of the cartridge, and the source of the other N-type MOS transistor is electrically connected to the second electrode of the cartridge. Or the sources of the two N-type MOS tubes are electrically connected with each other, the grid electrodes are also commonly connected together and are electrically connected with the sending end of the control module, the drain electrode of one N-type MOS tube is electrically connected with the first electrode of the cartridge, and the drain electrode of the other N-type MOS tube is electrically connected with the second electrode of the cartridge.

Specifically, based on the circuit in fig. 2, when the first electrode YD1 is connected to the positive driving electrode OUT and the second electrode YD2 is connected to the negative driving electrode GND, the source and the drain of the two N-type MOS transistors are both turned on when the transmitting end of the control module transmits a high voltage signal, so that the bidirectional switch K1 is connected to the first electrode and the second electrode to be turned on, and meanwhile, a certain on-resistance is also provided between the two electrodes. When the transmitting end of the control module transmits a low-voltage signal, the source electrode and the drain electrode of the two N-type MOS tubes are cut off, and then the bidirectional switch K1 is connected between the first electrode and the second electrode and is disconnected. The transmission signal is output from the first electrode YD1 to the positive driving electrode OUT. Similarly, when the first electrode YD1 is connected to the negative driving electrode GND and the second electrode YD2 is connected to the positive driving electrode OUT, the two electrically connected N-type MOS transistors have symmetry, and when the high voltage signal and the low voltage signal are also transmitted from the transmitting end of the control module, the transmission signal is output from the second electrode YD2 to the positive driving electrode OUT, as in the above-described working principle.

Preferably, the bidirectional switch K1 may also include two electrically connected P-type MOS transistors, the drains of the two electrically connected P-type MOS transistors are also commonly connected together, and the gates are electrically connected with the transmitting end of the control module, where the source of one P-type MOS transistor is electrically connected to the first electrode of the cartridge, and the source of the other P-type MOS transistor is electrically connected to the second electrode of the cartridge. The working principle of the MOS transistor is similar to that of two electrically connected N-type MOS transistors, and the description is omitted here.

Preferably, an amplifier RX is provided between the first electrode YD1 of the cartridge and the first receiving end MKIA of the control module MK, and an amplifier RX is also provided between the second electrode YD2 of the cartridge and the second receiving end MKIB of the control module MK. Therefore, when the first electrode YD1 is connected to the positive driving electrode OUT, the sending signal from the master control module ZK is amplified by the amplifier RX connected to the first receiving end MKIA and then transmitted to the control module MK for key verification; when the second electrode YD2 is connected to the positive driving electrode OUT, the sending signal from the master control module ZK is amplified by the amplifier RX connected to the second receiving end MKIB and then transmitted to the control module MK for key verification. By arranging the amplifiers on the two receiving channels, the accuracy of the received signals is improved, and key verification can be better carried out.

Preferably, a second comparator is further arranged between the receiving end of the main control module ZK in the tobacco rod and the positive driving electrode OUT of the tobacco rod, the output end of the second comparator is electrically connected with the receiving end ZKI of the main control module ZK, one input end of the second comparator inputs a reference voltage, for example, the reference voltage is lower than the battery voltage VDD, and the other input end of the second comparator is electrically connected with the positive driving electrode OUT of the tobacco rod. The second comparator is provided to identify the signal sent by the sender MKU of the control module MK in the cartridge, so as to effectively distinguish the voltage signals representing 0 and 1. This is because, when the control module MK in the cartridge sends a signal, the second switching tube is turned on, and when the bidirectional switch is controlled by the signal sent by the sending end MKU, and when the bidirectional switch is controlled to be turned off, the voltage of the positive driving electrode OUT of the cigarette rod approaches the battery voltage, that is, is equal to the battery voltage minus the conduction voltage between the source and the drain of the second switching tube, and the conduction voltage is small, so that the voltage of the positive driving electrode OUT approaches the battery voltage at this time; when the bidirectional switch is controlled to be turned on, the voltage of the positive driving electrode OUT of the smoke rod is the voltage division of the battery voltage at the on-resistance of the bidirectional switch, namely the second switch tube and the bidirectional switch are equivalent to be connected in series, and further, the on-resistance of the two MOS tubes connected in series of the bidirectional switch is generally equal to or close to the on-resistance of the second switch tube, so that the voltage of the positive driving electrode OUT is close to one half of the battery voltage at the moment. The reference voltage is therefore preferably set between the battery voltage and one half of the battery voltage, whereby the two voltages can be distinguished significantly.

With reference to fig. 3, fig. 3 is a schematic diagram of a tobacco rod and a cartridge in an electronic cigarette. When the control module MK performs key verification, the control module MK sends a signal to the master control module ZK to perform verification feedback, the P-type MOS transistor of the second switching transistor is turned on, the bidirectional switch is controlled by the sending end MKU of the control module MK, and the signal is sent to the master control module ZK through the first electrode YD1 or the second electrode YD2 and the positive driving electrode OUT. The voltage of the first electrode or the second electrode of the cartridge is close to the voltage VDD of the battery BAT before the bidirectional switch is not turned on, and after the bidirectional switch is turned on, the on-resistance of the two MOS transistors constituting the bidirectional switch is far smaller than the nebulizer resistor R1 and is approximately about 1/10 of the nebulizer resistor R1, and the on-resistance of the bidirectional switch is close to the on-resistance of the P-type MOS transistor, so that after the bidirectional switch is turned on, the voltage of the first electrode or the second electrode of the cartridge (i.e., the voltage input to the second comparator through the positive driving electrode OUT of the cigarette rod) is close to half the voltage VDD of the battery BAT, i.e., VDD/2. It can be seen that, depending on the ratio of the on-resistance of the bidirectional switch to the on-resistance of the P-type MOS transistor, the on-resistance of the bidirectional switch and the on-resistance of the P-type MOS transistor are generally smaller and are approximately equal.

Therefore, when the reference voltage is selected, the reference voltage is smaller than the battery voltage VDD minus the voltage difference of the on voltage between the source and the drain of the P-type MOS transistor as the second switching transistor, which is close to VDD due to the smaller on voltage. Meanwhile, the voltage value of the battery is larger than the voltage value at the connection position of the drain electrode of the P-type MOS tube and the bidirectional switch after the battery voltage passes through the conduction resistance between the source electrode and the drain electrode of the P-type MOS tube and the series connection of the conduction resistance between the source electrode and the drain electrode of the MOS tube in the bidirectional switch, and the voltage value is preferably VDD/2. In the invention, the battery voltage VDD is 4V, the reference voltage is VDD-1 V=3V, thus obviously 4V is more than 3V and 2V is less than 3V, and the signal with high and low voltage can be effectively identified to enter the receiving end of the main control module through the second comparator.

Preferably, the cartridge further comprises an internal power source electrically connected to the first electrode and the second electrode for supplying power to the control module MK. With continued reference to fig. 4 in conjunction with fig. 2 and 3, this is a first implementation of the circuit of the internal power supply AD3, and includes a first diode AD31, a second diode AD32, a third diode AD33, a fourth diode AD34, and a power supply capacitor AD35, where the anode of the first diode AD31 is electrically connected to the first electrode YD1, and the cathode of the first diode AD31 is electrically connected to the cathode of the second diode AD32, where the connection is used as a positive voltage output terminal for supplying power to the control module inside the cartridge, and is electrically connected to the power supply terminal MKC of the control module MK, where the connection is further electrically connected to the power supply capacitor AD35 and then to ground, where the anode of the second diode AD32 is electrically connected to the second electrode YD2, where the anode of the third diode AD33 is grounded, and where the anode of the fourth diode AD34 is also electrically connected to ground, and where the cathode of the third diode AD33 is electrically connected to the anode of the first diode AD1, and where the cathode of the fourth diode AD34 is also electrically connected to the anode of the second electrode YD2. Preferably, the connection positions of the first electrode and the second electrode may be interchanged here, because of symmetry of the circuit composition.

It can be seen that when the first electrode is connected to a positive voltage and the corresponding second electrode is grounded, the first diode AD31 and the fourth diode AD34 are turned on, the second diode AD32 and the third diode AD33 are turned off, and the voltage of the internal power supply is the voltage input from the outside minus the PN on voltage of the first diode AD31 and the PN on voltage of the fourth diode AD34, and then the voltage drops are left. Similarly, when the first electrode is grounded and the second electrode is connected to a positive voltage, the second diode AD32 and the third diode AD33 are turned on, the first diode AD31 and the fourth diode AD34 are turned off, and the voltage of the internal power supply is a voltage drop value obtained by subtracting the PN on voltage of the second diode AD32 and the PN on voltage of the third diode AD33 from the externally inputted positive voltage.

Through this internal power source, when main control module sends the signal to control module, just can charge this internal power source through the pulse of send signal for power supply capacitor AD35 is charged the back and is supplied power to control module, consequently the inside total power supply that can not need of cigarette bullet, but utilizes communication signal to realize the sharing of power supply and information transmission. Therefore, the main control module can also send a group of pulse signals to the control module to charge the internal power supply, and then send the signals to carry out key verification.

Further, fig. 5 shows another embodiment of the internal power supply, that is, a polarity conversion circuit is disposed between the first electrode and the second electrode, through which the only output of the positive and negative polarities of the power supply can be achieved, that is, the positive and negative polarities of the output after passing through the polarity conversion circuit are determined and unique no matter how the first electrode and the second electrode are connected to the external voltage. Fig. 5 includes a first P-type MOS transistor P1, a second P-type MOS transistor P2, a first N-type MOS transistor N1, and a second N-type MOS transistor N2; the grid electrode of the first P type MOS tube P1 is electrically connected with the grid electrode of the first N type MOS tube N1 and used as a first grid electrode connecting point G1; the grid electrode of the second P type MOS tube P2 is electrically connected with the grid electrode of the second N type MOS tube N2 and used as a second grid electrode connecting point G2; the source electrode of the first P type MOS tube P1 is electrically connected with the drain electrode of the first N type MOS tube N1 and used as a first drain electrode connecting point D1; the source electrode of the second P type MOS tube P2 is electrically connected with the drain electrode of the second N type MOS tube N2 and used as a second drain electrode connecting point D2; the drain electrode of the first P-type MOS tube P1 is electrically connected with the drain electrode of the second P-type MOS tube P2 and is used as the positive electrode output end DC+ of the polarity conversion circuit; the source electrode of the first N-type MOS tube N1 is electrically connected with the source electrode of the second N-type MOS tube N2 and is used as a negative electrode output end DC-of the polarity conversion circuit; the first electrode YD1 is electrically connected to the first drain connection point D1 and the second gate connection point G2, and the second electrode YD2 is electrically connected to the second drain connection point D2 and the first gate connection point G1. Further, a charging capacitor is electrically connected to the positive output dc+ of the polarity conversion circuit and is electrically connected to the power supply terminal of the control module, and the other end of the capacitor is electrically connected to the negative output DC-of the polarity conversion circuit in common with the ground terminal of the control module.

As can be seen, when the first electrode YD1 inputs a positive voltage, the second electrode YD2 is grounded, and a negative voltage difference is formed between the gate and the source of the first P-type MOS transistor P1, so that the drain and the source of the first P-type MOS transistor P1 are turned on, and the positive voltage input through the first electrode YD1 reaches the positive output terminal dc+ of the polarity conversion circuit, and the drain and the source of the first N-type MOS transistor N1 are turned off; meanwhile, the drain electrode and the source electrode of the second P-type MOS tube P2 are cut off, the drain electrode and the source electrode of the second N-type MOS tube N2 are conducted, and the second electrode YD2 is grounded, so that the negative electrode output end DC-grounding of the polarity conversion circuit is achieved. When the first electrode YD1 is grounded and the second electrode YD2 inputs a positive voltage, a negative voltage difference is formed between the grid electrode and the source electrode of the second P-type MOS tube P2, so that the drain electrode and the source electrode of the second P-type MOS tube P2 are conducted, the positive voltage input through the second electrode YD2 reaches the positive output end DC+ of the polarity conversion circuit, and the drain electrode and the source electrode of the second N-type MOS tube N2 are cut off; meanwhile, the drain electrode and the source electrode of the first P-type MOS tube P1 are cut off, the drain electrode and the source electrode of the first N-type MOS tube N1 are conducted, and the negative electrode output end DC-grounding of the polarity conversion circuit is grounded through the first electrode YD 1.

The effect the same as that of the embodiment shown in fig. 4 is that the internal power supply shown in fig. 5 can also meet the advantage that the internal power supply can be charged by the pulse of the transmitted signal when the main control module transmits the signal to the control module, is not limited by the polarity of the access power supply, and has the advantages of convenient use and high safety.

Further, the key verification is mainly that the key is identified and checked between the main control module and the control module of the tobacco stem. Preferably, if the verification is valid, the bidirectional switch is in a normally-open state, so that the power supply heating of the atomizer is not influenced. If the verification key is invalid, the second switch tube is in a normally open state, so that the battery cannot supply power to the cartridge.

Preferably, for example, the master control module ZK of the tobacco rod reads the key stored in the master control module ZK from the control module MK, and if the key belongs to a normal and valid key, the master control module ZK recognizes that the cartridge is a qualified product. Otherwise, if the key cannot be read, or the read key is an expired key, a repeated key or an error key, the key belongs to an invalid key, the master control module ZK recognizes that the cartridge is a counterfeit cartridge, and correspondingly takes control actions, such as controlling to make the cartridge incapable of being powered up for use, incapable of carrying out power supply heating on the atomizer therein, and the like.

It can also be seen that, in order to realize the key authentication, after the first electrode or the second electrode of the cartridge is connected with the positive driving electrode OUT of the tobacco rod, a signal transmission channel is further established between the control module MK and the master control module ZK, that is, an electrical connection channel formed by connecting the first electrode or the second electrode of the cartridge with the positive driving electrode of the tobacco rod has the function of the signal transmission channel required by the key information interaction.

The electrical connection channel formed by connecting the first electrode or the second electrode of the cartridge and the positive drive electrode OUT of the stem can also be used as a connection channel for the internal power supply of the cartridge, so that the connection interface between the cartridge and the stem is reused here in order to save the electrical connection interface.

The multiplexing belongs to time division multiplexing, namely different functions are realized by using the same interface in different time periods, specifically, when the cigarette rod and the cigarette cartridge are connected, firstly, signal transmission is carried out to carry out key verification, and an internal power supply is charged briefly to supply power for a control module MK. After verification is effective, the interface is used for power supply connection, and continuous charging is carried out on an internal power supply. If the verification is invalid, power cannot be supplied through the interface. Therefore, the interface channel can be used for a signal transmission connection interface of key information and a power supply connection interface, so that the number of interfaces can be saved, the electrical connection mode of the cigarette shell and the cigarette rod is not required to be changed, the purpose of safety and anti-counterfeiting can be achieved only by replacing the circuit in the cigarette rod and the cigarette shell, the cost is reduced, and the existing electronic cigarette product is compatible.

Based on the embodiment of fig. 2, in combination with the embodiment of fig. 6, the difference is that fig. 6 adopts another implementation of a bidirectional switch, and fig. 7 is an enlarged circuit diagram of the bidirectional switch. In fig. 6 and 7, the bidirectional switch includes a first control N-type MOS transistor AD11, a second control N-type MOS transistor AD12, a first comparator AD13, and an isolation N-type MOS transistor AD14, wherein a first input end of the first comparator AD13 is electrically connected to a first electrode YD1, a second input end of the comparator is electrically connected to a second electrode YD2, an output end of the first comparator AD13 is divided into two paths, one path of output is directly electrically connected to a gate of the first control N-type MOS transistor AD11, the other path of output is electrically connected to a gate of the second control N-type MOS transistor AD12 after passing through a gate, sources of the two paths of output are electrically connected to each other, and are electrically connected to a base electrode of the isolation N-type MOS transistor AD14, a drain electrode of the first control N-type MOS transistor AD11 is electrically connected to a drain electrode of the isolation N-type MOS transistor AD14 and to a first electrode, a drain electrode of the second control N-type MOS transistor AD12 is electrically connected to a source of the isolation N-type MOS transistor AD14 and to a second electrode, and a transmitting end of the control module is electrically connected to the gate of the isolation N-type MOS transistor.

Based on the circuits in fig. 6 and fig. 7, when the first electrode YD1 is connected to a positive voltage and the second electrode YD2 is grounded, the first comparator AD13 outputs a low level, and then the gate corresponding to the first control N-type MOS transistor AD11 is at a low level, the first control N-type MOS transistor AD11 is turned off, and the gate of the second control N-type MOS transistor AD12 is at a high level due to the output of the comparator passing through the not gate, and the source and the drain of the second control N-type MOS transistor AD12 are turned on. When the transmitting end of the control module outputs a high-voltage signal, the base electrode and the drain electrode of the isolation N-type MOS tube AD14 are fully conducted, so that the conduction between the source electrode and the drain electrode of the isolation N-type MOS tube AD14 is realized, namely, the conduction between the first electrode YD1 and the second electrode YD2 is realized through the bidirectional switch. When the transmitting end of the control module outputs a low-voltage signal, the base electrode and the drain electrode of the isolation N-type MOS tube AD14 are cut off, so that the disconnection between the source electrode and the drain electrode of the isolation N-type MOS tube AD14 is realized, namely the disconnection between the first electrode YD1 and the second electrode YD2 is realized through the bidirectional switch.

When the first electrode YD1 is grounded and the second electrode YD2 is connected to a positive voltage, the first comparator AD13 outputs a high level, and then the source and the drain of the first control N-type MOS transistor AD11 are turned on corresponding to the high level of the gate of the first control N-type MOS transistor AD11, and the gate of the second control N-type MOS transistor AD12 is low level and the source and the drain of the second control N-type MOS transistor AD12 are turned off due to the output of the comparator passing through the not gate. When the transmitting end of the control module outputs a high-voltage signal, the base electrode and the source electrode of the isolation N-type MOS tube AD14 are fully conducted, so that the conduction between the source electrode and the drain electrode of the isolation N-type MOS tube AD14 is realized, namely, the conduction between the first electrode YD1 and the second electrode YD2 is realized through the bidirectional switch. When the transmitting end of the control module outputs a low-voltage signal, the base electrode and the source electrode of the isolation N-type MOS tube AD14 are cut off, so that the disconnection between the source electrode and the drain electrode of the isolation N-type MOS tube AD14 is realized, namely the disconnection between the first electrode YD1 and the second electrode YD2 is realized through the bidirectional switch.

In fig. 6, the principle of the control module for bidirectional information transmission by using the bidirectional switch is the same as that of the embodiment shown in fig. 3, and will not be described again here.

Further preferably, the isolation N-type MOS transistor in the bidirectional switch in fig. 6 and fig. 7 may also be an isolation P-type MOS transistor, the first control N-type MOS transistor and the second control N-type MOS transistor are also P-type MOS transistors, other components and circuit structures of the isolation circuit are unchanged, in addition, the boost circuit unit needs to be replaced by the negative-pressure circuit unit correspondingly, and when the isolation P-type MOS transistor is conducted and controlled at this time, a negative-voltage control signal output by the state latch unit needs to be verified, and specific circuit components are shown with reference to fig. 8 and are not repeated herein.

Preferably, in combination with fig. 9, based on the same inventive concept, the cartridge includes an atomizer WHQ, a first electrode YD1, a second electrode YD2, and a control module MK, two power supply terminals of the atomizer WHQ are electrically connected to the first electrode YD1 and the second electrode YD2 of the cartridge, a bidirectional switch K1 is further disposed between the first electrode YD1 and the second electrode YD2 of the cartridge, the control module includes a first receiving terminal MIKA and a second receiving terminal MIKB, and are electrically connected to the first electrode YD1 and the second electrode YD2, respectively, and a transmitting terminal MKU of the control module MK controls the bidirectional switch K1 to be turned on or off, and the transmitting terminal MKU is used for transmitting signals to the exterior of the cartridge.

When the control module MK receives a verification signal from outside the cartridge to perform key verification, the bidirectional switch K1 is turned off, the first electrode YD1 or the second electrode YD2 receives the verification signal from outside the cartridge, and after receiving the verification signal by the first receiving end MIKA or the second receiving end MIKB corresponding to the control module MK, the control module MK performs key verification; after verification is valid, the transmitting end of the control module MK transmits a feedback signal, and the feedback signal controls the on or off of the two-way switch K1 and transmits the feedback signal to the outside of the cartridge through the first electrode YD1 or the second electrode YD 2.

Preferably, referring to fig. 10, the bidirectional switch K1 includes two N-type MOS transistors electrically connected, the drains of the two N-type MOS transistors are electrically connected to each other, the gates of the two N-type MOS transistors are also commonly connected to each other and electrically connected to the transmitting end of the control module, the source of one N-type MOS transistor is electrically connected to the first electrode of the cartridge, and the source of the other N-type MOS transistor is electrically connected to the second electrode of the cartridge.

Preferably, the bidirectional switch may also be the embodiment shown in fig. 6 and fig. 7, or the embodiment shown in fig. 8, which will not be described herein.

Preferably, the cartridge further comprises an internal power source electrically connected to the first electrode YD1 and the second electrode YD2 for supplying power to the control module MK. The composition of the internal power supply is shown in the embodiment of fig. 4, and will not be described herein.

Further, in connection with fig. 11, the foregoing is based on the same concept and is incorporated. The invention also provides a key control chip X, which comprises a control module MK, a bidirectional switch K1, a first pin IO1 and a second pin IO2, wherein the bidirectional switch K1 comprises two access ends (Kb and Kc) and a controlled end Ka, the two access ends (Kb and Kc) are respectively and electrically connected with the first pin IO1 and the second pin IO2, the controlled end Ka is electrically connected with a transmitting end MKU of the control module MK, and the control module MK comprises a first receiving end MKIA and a second receiving end MKIB which are respectively and electrically connected with the first pin IO1 and the second pin IO2.

When the control chip X receives the verification signal, the bidirectional switch K1 is turned off, after the first pin IO1 or the second pin IO2 receives the signal from the outside, the signal is input to the control module MK through the first receiving end MKIA or the second receiving end MKIB, after the key control chip X performs key verification, the transmitting end MKU of the control module MK sends a feedback signal, and the feedback signal controls the bidirectional switch K1 to be turned on or off, so that the feedback signal is sent outwards through the first pin IO1 or the second pin IO2.

The bidirectional switch K1 includes two electrically connected N-type MOS transistors, the drains of the two electrically connected N-type MOS transistors are electrically connected to each other, and the gates of the two electrically connected N-type MOS transistors are also electrically connected together and electrically connected to the transmitting end MKU of the control module MK, where a source electrode of one N-type MOS transistor is electrically connected to the first pin IO1, and a source electrode of the other N-type MOS transistor is electrically connected to the second pin IO2.

Further, based on fig. 11, fig. 12 is another embodiment of the key control chip of the present invention, which is different from the embodiment of fig. 11 in that the bidirectional switch is the embodiment of fig. 6 and 7, so that the bidirectional switch includes a first control N-type MOS tube, a second control N-type MOS tube, a first comparator and an isolation N-type MOS tube, the first input end of the first comparator is electrically connected to the first pin, the second input end of the comparator is electrically connected to the first pin, the output end of the first comparator is divided into two paths, one path of output is directly electrically connected to the gate of the first control N-type MOS tube, the other path of output is electrically connected to the gate of the second control N-type MOS tube after passing through the non-gate, the sources of the two paths of output are electrically connected to each other, and are electrically connected to the base of the isolation N-type MOS tube, the drain of the first control N-type MOS tube is electrically connected to the drain of the isolation N-type MOS tube and to the first pin, the drain of the second control N-type MOS tube is electrically connected to the source of the isolation N-type MOS tube and to the second pin, and the output of the second control N-type MOS tube is electrically connected to the gate of the isolation N-type MOS tube.

Preferably, the control module MK further comprises an internal power supply electrically connected with the first pin IO1 and the second pin IO2 and used for supplying power to the control module MK. The composition of the internal power supply is shown in the embodiment of fig. 4 or fig. 5, and will not be described herein.

The key control chip X integrates the control module MK, the two-way switch K1 and the internal power supply into one chip, so that the electronic cigarette is used as a whole, can be applied to a cigarette bullet of the electronic cigarette, meets the positive and negative limitation of power polarity access to a cigarette rod, can be applied to other scenes needing key verification, and improves the application range of the chip.

Through the mode, the invention discloses the electronic cigarette, the cartridge for the electronic cigarette and the key control chip. After the tobacco stem is correspondingly connected with the tobacco bullet, the main control module sends a signal to the control module to carry out key verification, the two-way switch is disconnected, the second switch control is controlled by the sending end of the main control module to send a signal to the control module through the positive driving electrode and the first electrode or the second electrode, and the control module carries out key verification after receiving the signal by the receiving end of the control module; after verification is effective, the control module sends a signal to the main control module for verification feedback, the second switching tube is connected, the bidirectional switch is controlled by the sending end of the control module, the signal is sent to the main control module through the first electrode or the second electrode and the positive driving electrode, and after the signal is received by the receiving end of the main control module, the main control module completes key verification. The counterfeit and inferior cigarette bullet is prevented through key verification, the realization structure is simple, the limitation of the polarity of a power supply of a cigarette rod is avoided, and the electronic cigarette is compatible with the existing electronic cigarette.

The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the present invention and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present invention.

Claims

1. The electronic cigarette comprises a cigarette rod and a cigarette bullet, and is characterized in that the cigarette rod comprises a battery, a positive driving electrode, a negative driving electrode and a main control module, a second switching tube is arranged between the positive electrode of the battery and the positive driving electrode, the second switching tube is connected or disconnected under the control of a transmitting end of the main control module, a receiving end of the main control module is electrically connected with the positive driving electrode, and a grounding end of the main control module is electrically connected with the negative driving electrode;

the cigarette bullet comprises an atomizer, a first electrode, a second electrode and a control module, wherein two power supply ends of the atomizer are correspondingly and electrically connected with the first electrode and the second electrode, a bidirectional switch is further arranged between the first electrode and the second electrode of the cigarette bullet, the bidirectional switch tube is connected with the atomizer in parallel, the control module comprises a first receiving end and a second receiving end which are respectively and electrically connected with the first electrode and the second electrode, and a transmitting end of the control module controls the bidirectional switch to be switched on or off;

When the cigarette rod is correspondingly connected with the cigarette bullet for use, the positive driving electrode and the negative driving electrode of the cigarette rod are correspondingly connected with the first electrode and the second electrode of the cigarette bullet in an electric contact way respectively, or are correspondingly connected with the second electrode and the first electrode of the cigarette bullet in an electric contact way respectively;

after the tobacco stem is correspondingly connected with the tobacco bullet, the two-way switch is disconnected, a transmitting end of the main control module transmits a verification signal, the verification signal controls the second switching tube to be connected or disconnected, the verification signal is transmitted to the control module through the positive driving electrode and the first electrode or the second electrode, and after the verification signal is received by a first receiving end or a second receiving end corresponding to the control module, the control module performs key verification; after verification is effective, the control module performs verification feedback to the main control module, the second switching tube is connected, the transmitting end of the control module transmits a feedback signal, the feedback signal controls the two-way switch to be connected or disconnected, the feedback signal is transmitted to the main control module through the first electrode or the second electrode and the positive driving electrode, and after the feedback signal is received by the receiving end of the main control module, verification feedback is completed; after verification is effective and verification feedback is completed, the bidirectional switch is always turned off, and after verification is invalid, the second switch tube is always turned off.

2. The electronic cigarette of claim 1, wherein the second switch tube in the cigarette rod is a PMOS tube or an NMOS tube.

3. The electronic cigarette according to claim 2, wherein a second comparator is further arranged between the receiving end of the main control module in the cigarette rod and the positive driving electrode of the cigarette rod, the output end of the second comparator is electrically connected with the receiving end of the main control module, one input end of the second comparator inputs a reference voltage, and the other input end of the second comparator is electrically connected with the positive driving electrode of the cigarette rod.

4. The electronic cigarette of claim 3, wherein the bi-directional switch comprises two electrically connected N-type MOS tubes or two electrically connected P-type MOS tubes.

5. The electronic cigarette according to claim 3, wherein the bidirectional switch comprises a first control N-type MOS tube, a second control N-type MOS tube, a first comparator and an isolation N-type MOS tube, a first input end of the first comparator is electrically connected with a first electrode, a second input end of the comparator is electrically connected with a second electrode, an output end of the first comparator is divided into two paths, one path of output is directly electrically connected with a grid electrode of the first control N-type MOS tube, the other path of output is electrically connected with a grid electrode of the second control N-type MOS tube after passing through a NOT gate, sources of the two paths of output are electrically connected with each other and are electrically connected with a base electrode of the isolation N-type MOS tube, a drain electrode of the first control N-type MOS tube is electrically connected with a drain electrode of the isolation N-type MOS tube and is connected with the first electrode, a drain electrode of the second control N-type MOS tube is electrically connected with a source electrode of the isolation N-type MOS tube and is connected with a second electrode, and a transmitting end of the control module is electrically connected with the grid electrode of the isolation N-type MOS tube.

6. The electronic cigarette of any one of claims 1 to 5, further comprising an internal power source in electrical communication with the first electrode and the second electrode for powering the control module.

7. A cartridge for the electronic cigarette according to any one of claims 1 to 6, wherein the cartridge comprises an atomizer, a first electrode, a second electrode and a control module, two power supply ends of the atomizer are correspondingly and electrically connected with the first electrode and the second electrode, a bidirectional switch is further arranged between the first electrode and the second electrode of the cartridge, the bidirectional switch tube is connected with the atomizer in parallel, the control module comprises a first receiving end and a second receiving end which are respectively and electrically connected with the first electrode and the second electrode, and a transmitting end of the control module controls the bidirectional switch to be switched on or off;

when the control module receives a verification signal from the exterior of the cartridge to perform key verification, the two-way switch is turned off, the first electrode or the second electrode receives the verification signal from the exterior of the cartridge, and after the verification signal is received by the first receiving end or the second receiving end corresponding to the control module, the control module performs key verification; after verification is effective, the transmitting end of the control module transmits a feedback signal, the feedback signal controls the on or off of the two-way switch, and the feedback signal is transmitted to the outside of the cartridge through the first electrode or the second electrode.

8. The cartridge of claim 7, wherein the bi-directional switch in the cartridge comprises two electrically connected N-type MOS transistors or two electrically connected P-type MOS transistors.

9. The cartridge of claim 7, wherein the bidirectional switch comprises a first control N-type MOS tube, a second control N-type MOS tube, a first comparator and an isolation N-type MOS tube, wherein a first input end of the first comparator is electrically connected with a first electrode, a second input end of the comparator is electrically connected with a second electrode, an output end of the first comparator is divided into two paths, one path of output is directly electrically connected with a grid electrode of the first control N-type MOS tube, the other path of output is electrically connected with a grid electrode of the second control N-type MOS tube after passing through a NOT gate, sources of the two paths of output are electrically connected with each other and are electrically connected with a base electrode of the isolation N-type MOS tube, a drain electrode of the first control N-type MOS tube is electrically connected with a drain electrode of the isolation N-type MOS tube and is connected with the first electrode, a drain electrode of the second control N-type MOS tube is electrically connected with a source electrode of the isolation N-type MOS tube and is connected with a second electrode, and a transmitting end of the control module is electrically connected with the grid electrode of the isolation N-type MOS tube.

10. The cartridge of any one of claims 7 to 9, further comprising an internal power source electrically connected to the first electrode and the second electrode for powering the control module.

11. The key control chip is characterized by comprising a control module, a bidirectional switch, a first pin and a second pin, wherein the bidirectional switch comprises two access ends and a controlled end, the two access ends are respectively and electrically connected with the first pin and the second pin, the controlled end is electrically connected with a transmitting end of the control module, and the control module comprises a first receiving end and a second receiving end which are respectively and electrically connected with the first pin and the second pin;

when the control chip receives the verification signal, the bidirectional switch is disconnected, the first pin or the second pin receives the signal from the outside and then inputs the signal to the control module through the first receiving end or the second receiving end, after the key control chip performs key verification, the sending end of the control module sends out a feedback signal, the feedback signal controls the bidirectional switch to be connected or disconnected, and then the feedback signal is sent out through the first pin or the second pin.

12. The key control chip of claim 11, wherein the bi-directional switch comprises two electrically connected N-type MOS transistors or two electrically connected P-type MOS transistors.

13. The key control chip of claim 11, wherein the bidirectional switch comprises a first control N-type MOS tube, a second control N-type MOS tube, a first comparator and an isolation N-type MOS tube, wherein a first input end of the first comparator is electrically connected with the first pin, a second input end of the comparator is electrically connected with the first pin, an output end of the first comparator is divided into two paths, one path of output is directly electrically connected with a grid electrode of the first control N-type MOS tube, the other path of output is electrically connected with a grid electrode of the second control N-type MOS tube after passing through the NOT gate, sources of the two paths of output are electrically connected with each other and are electrically connected with a base electrode of the isolation N-type MOS tube, a drain electrode of the first control N-type MOS tube is electrically connected with a drain electrode of the isolation N-type MOS tube and is connected with the first pin, a drain electrode of the second control N-type MOS tube is electrically connected with a source electrode of the isolation N-type MOS tube and is connected with the second pin, and a transmitting end of the control module is electrically connected with the grid electrode of the isolation N-type MOS tube.

14. The key control chip of any one of claims 11 to 13, further comprising an internal power supply electrically connected to the first pin and the second pin for supplying power to the control module.