Electronic cigarette charging circuit and electronic cigarette

Abstract

The present invention relates to an electronic cigarette charging circuit and an electronic cigarette, comprising a charging input terminal, an anti-reverse connection module, an anti-overvoltage module, a charging management module and a power supply; the charging input terminal is used to connect to a charging power supply; the anti-overvoltage module is connected between the charging input terminal and the charging management module; the anti-reverse connection module is connected between the charging input terminal and the charging management module; the charging management module is also connected to the power supply; the anti-reverse connection module is used to disconnect the path between the charging input terminal and the charging management module when the polarity of the charging power supply and the charging input terminal is reversed; the anti-overvoltage module is used to disconnect the path between the charging input terminal and the charging management module when the voltage value output by the charging power supply is greater than a first set threshold. The electronic cigarette charging circuit and the electronic cigarette have the performance of anti-reverse connection and anti-overvoltage when charging, thereby improving the safety of electronic cigarette use.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic cigarettes, and in particular to an electronic cigarette charging circuit and an electronic cigarette. Background Art

[0002] Electronic cigarettes are electronic products that imitate cigarettes. They have the same appearance, smoke, taste and feel as cigarettes. They can not only satisfy people who have the habit of smoking, but also reduce the impact of harmful substances in cigarettes on smokers' bodies. Therefore, they are popular among smokers.

[0003] In order to improve the user experience of electronic cigarettes, the power rod type electronic cigarettes have been improved for the second generation. Instead of blindly pursuing large smoke and high power, they put the user's experience first. The improved products usually include electronic cigarette boxes (also known as electronic cigarette power banks) and cigarette rods (also known as heating rods). Among them, the cigarette rods can be used for users to smoke, and the electronic cigarette box can charge the cigarette rods, and has a strong endurance. The electronic cigarette box is small and exquisite, even smaller than the real cigarette box, so that users can carry it with them and take it out at any time, which is a very ideal experience. However, how to improve the safety of electronic cigarette use is still a problem that people are more concerned about. Summary of the invention

[0004] Based on this, it is necessary to provide an electronic cigarette charging circuit and an electronic cigarette to solve the problem of how to improve the safety of electronic cigarette use.

[0005] An electronic cigarette charging circuit, applied to an electronic cigarette, comprises a charging input terminal, an anti-reverse connection module, an anti-overvoltage module, a charging management module and a power supply; the charging input terminal is used to connect to a charging power supply; the anti-overvoltage module is connected between the charging input terminal and the charging management module; the anti-reverse connection module is connected between the charging input terminal and the charging management module; the charging management module is also connected to the power supply;

[0006] The reverse connection prevention module is used to disconnect the path between the charging input terminal and the charging management module when the polarity of the charging power supply and the charging input terminal is reversed; the overvoltage prevention module is used to disconnect the path between the charging input terminal and the charging management module when the voltage value output by the charging power supply is greater than a first set threshold.

[0007] In one embodiment, the output end of the overvoltage protection module is connected to the reverse connection protection module; the reverse connection protection module is also connected between the charging input end and the charging management module;

[0008] The overvoltage protection module is used to control the anti-reverse connection module to switch to a disconnected state when the voltage value output by the charging power supply is greater than a first set threshold value, so as to disconnect the path between the charging input terminal and the charging management module.

[0009] In one embodiment, the electronic cigarette charging circuit further includes a voltage detection module; the voltage detection module is respectively connected to the charging input terminal and the overvoltage protection module;

[0010] The voltage detection module is used to detect the voltage output by the charging power supply, and when the voltage value output by the charging power supply increases, the voltage value output by the voltage detection module also increases accordingly;

[0011] The overvoltage protection module is used to control the anti-reverse connection module to switch to a disconnected state when the voltage value output by the voltage detection module is greater than a second set threshold value, so as to disconnect the path between the charging input terminal and the charging management module.

[0012] In one embodiment, the voltage detection module includes a resistor R4 and a resistor R5; one end of the resistor R4 is connected to the positive electrode of the charging input terminal, and the other end of the resistor R4 is connected to the negative electrode of the charging input terminal through the resistor R5; the common end of the resistor R4 and the resistor R5 is also connected to the input end of the overvoltage protection module.

[0013] In one embodiment, the reverse connection protection module includes a PMOS tube Q1; the drain of the PMOS tube Q1 is connected to the positive electrode of the charging input terminal, and the gate of the PMOS tube Q1 is connected to the output terminal of the overvoltage protection module; the source of the PMOS tube Q1 is connected to the positive electrode of the charging management module.

[0014] In one embodiment, the overvoltage protection module includes a controllable precision voltage stabilizing source VR1, a transistor Q2, a resistor R6, a resistor R7, a resistor R8, a resistor R9 and a capacitor C10; the reference electrode of the controllable precision voltage stabilizing source VR1 is connected to the output end of the voltage detection module, the cathode of the controllable precision voltage stabilizing source VR1 is connected to the positive electrode of the charging input end through the resistor R6, and the anode of the controllable precision voltage stabilizing source VR1 is connected to the negative electrode of the charging input end; the base of the transistor Q2 is connected to the resistor R9 through the resistor R 6 and the common end between the controllable precision voltage regulator VR1; the collector of the transistor Q2 is connected to the anti-reverse connection module through the resistor R8; the emitter of the transistor Q2 is connected to the negative electrode of the charging input terminal; one end of the resistor R7 is connected to the positive electrode of the charging input terminal, and the other end of the resistor R7 is connected to the resistor R8 and the common end of the anti-reverse connection module; one end of the capacitor C10 is connected to the negative electrode of the charging input terminal, and the other end of the capacitor C10 is connected to the resistor R8 and the common end of the transistor Q2.

[0015] In one of the embodiments, the electronic cigarette charging circuit further includes a display module; the display module is used to indicate whether the circuit between the charging input terminal and the charging management module is connected.

[0016] In one embodiment, the display module includes an electrolytic capacitor CD2, a capacitor C3, an electrolytic capacitor CD3, a diode D1 and a resistor R10; the cathode of the diode D1 is connected to the cathode of the charging input terminal, and the anode of the diode D1 is connected to the anti-reverse connection module through the resistor R10; the anode of the electrolytic capacitor CD2, one end of the capacitor C3, and the anode of the electrolytic capacitor CD3 are respectively connected to the anti-reverse connection module; the cathode of the electrolytic capacitor CD2, the other end of the capacitor C3, and the cathode of the electrolytic capacitor CD3 are respectively connected to the cathode of the charging input terminal.

[0017] An electronic cigarette comprises the electronic cigarette charging circuit.

[0018] The above-mentioned electronic cigarette charging circuit and electronic cigarette have the following beneficial effects: the anti-reverse connection module disconnects the path between the charging input terminal and the charging management module when the polarity of the charging power supply is reversed, and the anti-overvoltage module disconnects the path between the charging input terminal and the charging management module when the voltage value output by the charging power supply is greater than the first set threshold value. Therefore, the electronic cigarette charging circuit has the performance of anti-reverse connection and anti-overvoltage during charging, thereby improving the safety of electronic cigarette use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A block diagram of an electronic cigarette charging circuit provided in one embodiment;

[0021] Figure 2 for Figure 1 A block diagram of one of the embodiments of the electronic cigarette charging circuit of the illustrated embodiment;

[0022] Figure 3 for Figure 2 A circuit diagram of one embodiment of an electronic cigarette charging circuit of the illustrated embodiment. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the invention belongs. The terms used herein in the specification of the invention are only for the purpose of describing specific embodiments and are not intended to limit the invention. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0025] One embodiment provides an electronic cigarette charging circuit, which is applied to an electronic cigarette and is used to protect the charging process of the electronic cigarette. If the electronic cigarette includes an electronic cigarette case and a cigarette rod, the electronic cigarette charging circuit can be arranged in the cigarette rod to protect the cigarette rod during the process of inserting the cigarette rod into the electronic cigarette case for charging; or, the electronic cigarette charging circuit can also be arranged in the electronic cigarette case to protect the electronic cigarette case during the process of charging the electronic cigarette case.

[0026] Please refer to Figure 1, the electronic cigarette charging circuit includes a charging input terminal 100, an anti-reverse connection module 200, an anti-overvoltage module 300, a charging management module 400 and a power supply (not shown in the figure). Among them, the charging input terminal 100 is used to connect to the charging power supply. Specifically, if the electronic cigarette charging circuit is applied to an electronic cigarette box, the charging power supply is an external DC power supply; if the electronic cigarette charging circuit is applied to a cigarette rod, the charging power supply is the power supply in the electronic cigarette box. The anti-overvoltage module 300 is connected between the charging input terminal 100 and the charging management module 400. The anti-reverse connection module 200 is connected between the charging input terminal 100 and the charging management module 400. The charging management module 400 is also connected to the power supply.

[0027] The power source is, for example, a lithium battery. The charging management module 400 manages the charging process of the power source. Assuming that the power source is a lithium battery, the charging management module 400 can control the power source charging process to sequentially go through three stages: trickle charging, constant current charging, and constant voltage charging, to ensure that the lithium battery can complete the charging process safely and quickly.

[0028] The anti-reverse connection module 200 is used to disconnect the path between the charging input terminal 100 and the charging management module 400 when the polarity of the charging power supply and the charging input terminal 100 is reversed. The reverse polarity of the charging power supply and the charging input terminal 100 means that the positive pole of the charging power supply is connected to the negative pole of the charging input terminal 100, and the negative pole of the charging power supply is connected to the positive pole of the charging input terminal 100. When the anti-reverse connection module 200 disconnects the path between the charging input terminal 100 and the charging management module 400, the entire electronic cigarette charging circuit stops running, thereby avoiding faults caused by reverse polarity connection.

[0029] The anti-overvoltage module 300 is used to disconnect the path between the charging input terminal 100 and the charging management module 400 when the voltage value output by the charging power supply is greater than the first set threshold value. Among them, the voltage value output by the charging power supply is greater than the first set threshold value, which is equivalent to overvoltage charging. When the anti-overvoltage module 300 disconnects the path between the charging input terminal 100 and the charging management module 400, the entire electronic cigarette charging circuit stops running, thereby avoiding failures caused by overvoltage. In summary, the above-mentioned electronic cigarette charging circuit provided in this embodiment is provided with an anti-reverse connection module 200 and an anti-overvoltage module 300, so that the electronic cigarette has the performance of anti-reverse connection and anti-overvoltage when charging, thereby improving the safety of electronic cigarette use.

[0030] In one embodiment, please continue to refer to 1, the output end of the overvoltage protection module 300 is connected to the anti-reverse connection module 200. The anti-reverse connection module 200 is also connected between the charging input terminal 100 and the charging management module 400. Specifically, the anti-reverse connection module 200 can be connected between the positive pole of the charging input terminal 100 and the positive pole of the charging management module 400.

[0031] The overvoltage protection module 300 is used to control the anti-reverse connection module 200 to switch to the disconnected state when the voltage value output by the charging power source is greater than the first set threshold value, so as to disconnect the path between the charging input terminal 100 and the charging management module 400. Therefore, when overvoltage charging occurs, the overvoltage protection module 300 can control the anti-reverse connection module 200 to disconnect the path between the charging input terminal 100 and the charging management module 400.

[0032] Therefore, in this embodiment, the anti-reverse connection module 200 not only plays the role of disconnecting the electronic cigarette charging circuit in preventing overvoltage, but also has an anti-reverse connection function, thereby further improving the safety of the electronic cigarette.

[0033] In one of the embodiments, please refer to Figure 1 The electronic cigarette charging circuit further includes a voltage detection module 500. The voltage detection module 500 is connected to the charging input terminal 100 and the overvoltage protection module 300 respectively.

[0034] The voltage detection module 500 is used to detect the voltage output by the charging power supply, and when the voltage value output by the charging power supply increases, the voltage value output by the voltage detection module 500 also increases accordingly. Therefore, when the voltage value output by the charging power supply is large, the voltage value output by the voltage detection module 500 is also large, that is, the voltage detection module 500 can reflect the magnitude of the output voltage of the charging power supply.

[0035] The overvoltage protection module 300 is used to control the anti-reverse connection module 200 to switch to the disconnected state when the voltage value output by the voltage detection module 500 is greater than the second set threshold value, so as to disconnect the path between the charging input terminal 100 and the charging management module 400. Among them, since the voltage detection module 500 can reflect the voltage output by the charging power supply, when the voltage output by the charging power supply is large and greater than the first set threshold value, the voltage value output by the voltage detection module 500 is greater than the second set threshold value, and the overvoltage protection module 300 can disconnect the electronic cigarette charging circuit through the anti-reverse connection module 200.

[0036] Specifically, please refer to Figure 3 The voltage detection module 500 includes a resistor R4 and a resistor R5. One end of the resistor R4 is connected to the positive electrode of the charging input terminal 100, and the other end of the resistor R4 is connected to the negative electrode of the charging input terminal 100 through the resistor R5. The common end of the resistor R4 and the resistor R5 is also connected to the input end of the overvoltage protection module 300.

[0037] In this embodiment, in the above-mentioned voltage detection module 500, when an overvoltage occurs in the charging power supply, the voltage at the common end of the resistor R4 and the resistor R5 (i.e., the voltage of the resistor R5) is relatively large, and the overvoltage protection module 300 disconnects the path between the charging input terminal 100 and the charging management module 400 through the reverse connection protection module 200.

[0038] Anti-overvoltage module 300 Anti-reverse connection module 200 Anti-overvoltage module 300 Anti-overvoltage module Anti-reverse connection module 200 Anti-reverse connection module 200 Anti-reverse connection module 200 Anti-overvoltage module 300 Second set threshold Anti-reverse connection module 200 Anti-overvoltage module 300 Anti-reverse connection module 200 Anti-reverse connection module 200 Anti-reverse connection module 200 For details, please continue to refer to Figure 3 The reverse connection prevention module 200 includes a PMOS tube Q1. The drain of the PMOS tube Q1 is connected to the positive electrode of the charging input terminal 100, and the gate of the PMOS tube Q1 is connected to the output terminal of the overvoltage prevention module 300. The source of the PMOS tube Q1 is connected to the positive electrode of the charging management module 400.

[0039] For details, please continue to refer to Figure 3 , the overvoltage protection module 300 includes a controllable precision voltage regulator VR1, a transistor Q2, a resistor R6, a resistor R7, a resistor R8, a resistor R9 and a capacitor C10. Among them, the reference electrode of the controllable precision voltage regulator VR1 is connected to the output end of the voltage detection module 500. Specifically, the reference electrode of the controllable precision voltage regulator VR1 is connected to the common end of the resistor R4 and the resistor R5 in the voltage detection module 500. The cathode of the controllable precision voltage regulator VR1 is connected to the positive electrode of the charging input terminal 100 through the resistor R6, and the anode of the controllable precision voltage regulator VR1 is connected to the negative electrode of the charging input terminal 100. The base of the transistor Q2 is connected to the common end between the resistor R6 and the controllable precision voltage regulator VR1 through the resistor R9. The collector of the transistor Q2 is connected to the anti-reverse connection module 200 through the resistor R8. Specifically, the collector of the transistor Q2 is connected to the gate of the above-mentioned PMOS tube Q1 through the resistor R8. The emitter of transistor Q2 is connected to the negative electrode of charging input terminal 100. One end of resistor R7 is connected to the positive electrode of charging input terminal 100, and the other end of resistor R7 is connected to the common end of resistor R8 and anti-reverse connection module 200. One end of capacitor C10 is connected to the negative electrode of charging input terminal 100, and the other end of capacitor C10 is connected to the common end of resistor R8 and transistor Q2.

[0040] In one of the embodiments, please refer to Figure 2 , Figure 3, the above-mentioned electronic cigarette charging circuit also includes a display module 600. The display module 600 is used to indicate whether the circuit between the charging input terminal 100 and the charging management module 400 is connected. For example: when the circuit between the charging input terminal 100 and the charging management module 400 is connected (that is, neither overvoltage nor reverse polarity of the charging power supply and the charging input terminal 100 occurs), the display module 600 emits light; when the circuit between the charging input terminal 100 and the charging management module 400 is disconnected (that is, overvoltage occurs or reverse polarity of the charging power supply and the charging input terminal 100 occurs), the display module 600 does not emit light.

[0041] For details, please continue to refer to Figure 3 , the display module 600 includes an electrolytic capacitor CD2, a capacitor C3, an electrolytic capacitor CD3, a diode D1 and a resistor R10. The cathode of the diode D1 is connected to the cathode of the charging input terminal 100. The anode of the diode D1 is connected to the anti-reverse connection module 200 through the resistor R10. Specifically, the anode of the diode D1 is connected to the source of the PMOS tube Q1 in the anti-reverse connection module 200 through the resistor R10. The anode of the electrolytic capacitor CD2, one end of the capacitor C3, and the anode of the electrolytic capacitor CD3 are respectively connected to the anti-reverse connection module 200. Specifically, the anode of the electrolytic capacitor CD2, one end of the capacitor C3, and the anode of the electrolytic capacitor CD3 are respectively connected to the source of the PMOS tube Q1 in the anti-reverse connection module 200. The cathode of the electrolytic capacitor CD2, the other end of the capacitor C3, and the cathode of the electrolytic capacitor CD3 are respectively connected to the cathode of the charging input terminal 100.

[0042] Next, Figure 3 Taking the circuit diagram shown as an example, one of the working principles of the electronic cigarette charging circuit provided in this embodiment is described:

[0043] When the voltage output by the charging power supply is large and greater than the first set threshold, the voltage at the common end of the resistor R4 and the resistor R5 is greater than the second set threshold. At this time, the controllable precision voltage regulator VR1 is turned on and the transistor Q2 is turned off, so that the gate of the PMOS tube Q1 is at a high level, so the PMOS tube Q1 is turned off, thereby disconnecting the path between the charging input terminal 100 and the charging management module 400. At this time, the charging power supply cannot supply power to the charging management module 400 and the power supply through the electronic cigarette charging circuit, thereby playing an overvoltage protection function.

[0044] When the voltage output by the charging power supply is less than the first set threshold, the voltage at the common end of the resistor R4 and the resistor R5 is less than the second set threshold. At this time, the controllable precision voltage regulator VR1 is disconnected, and the transistor Q2 is turned on, so that the gate of the PMOS tube Q1 is at a low level. Therefore, the PMOS tube Q1 is turned on, and the circuit between the charging input terminal 100 and the charging management module 400 is connected. At this time, the charging power supply can supply power to the charging management module 400 and the power supply through the electronic cigarette charging circuit.

[0045] When the polarity of the charging power supply and the charging input terminal 100 is reversed, the controllable precision voltage regulator VR1 is turned on, thereby making the gate voltage of the PMOS tube Q1 high through the resistors R9 and R8. At this time, the PMOS tube Q1 is turned off, and the path between the charging input terminal 100 and the charging management module 400 can be disconnected, thereby playing an anti-reverse connection function.

[0046] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. An electronic cigarette charging circuit, applied to electronic cigarettes, characterized in that: It includes a charging input terminal, an anti-reverse connection module, an anti-overvoltage module, a charging management module and a power supply; the charging input terminal is used to connect to the charging power supply; the anti-overvoltage module is connected between the charging input terminal and the charging management module; the anti-reverse connection module is connected between the charging input terminal and the charging management module; the charging management module is also connected to the power supply; The anti-reverse connection module is used to disconnect the path between the charging input terminal and the charging management module when the polarity of the charging power supply and the charging input terminal is reversed; The overvoltage protection module is used to disconnect the path between the charging input terminal and the charging management module when the voltage value output by the charging power supply is greater than a first set threshold; The output end of the overvoltage protection module is connected to the reverse connection protection module; the reverse connection protection module is also connected between the charging input end and the charging management module; The overvoltage protection module is used to control the anti-reverse connection module to switch to a disconnected state when the voltage value output by the charging power source is greater than a first set threshold value, so as to disconnect the path between the charging input terminal and the charging management module; The electronic cigarette charging circuit also includes a voltage detection module; the voltage detection module is connected to the charging input terminal and the overvoltage protection module respectively; The reverse connection prevention module includes a PMOS tube Q1; the drain of the PMOS tube Q1 is connected to the positive electrode of the charging input terminal, the gate of the PMOS tube Q1 is connected to the output terminal of the overvoltage prevention module; the source of the PMOS tube Q1 is connected to the positive electrode of the charging management module; The overvoltage protection module includes a controllable precision voltage stabilizing source VR1, a transistor Q2, a resistor R6, a resistor R7, a resistor R8, a resistor R9 and a capacitor C10; the reference electrode of the controllable precision voltage stabilizing source VR1 is connected to the output end of the voltage detection module, the cathode of the controllable precision voltage stabilizing source VR1 is connected to the positive electrode of the charging input end through the resistor R6, and the anode of the controllable precision voltage stabilizing source VR1 is connected to the negative electrode of the charging input end; the base of the transistor Q2 is connected to the resistor R6 and the controllable precision voltage stabilizing source VR1 through the resistor R9. The common end between the control precision voltage regulator VR1; the collector of the transistor Q2 is connected to the anti-reverse connection module through the resistor R8; the emitter of the transistor Q2 is connected to the negative electrode of the charging input terminal; one end of the resistor R7 is connected to the positive electrode of the charging input terminal, and the other end of the resistor R7 is connected to the resistor R8 and the common end of the anti-reverse connection module; one end of the capacitor C10 is connected to the negative electrode of the charging input terminal, and the other end of the capacitor C10 is connected to the resistor R8 and the common end of the transistor Q2; When the polarity of the charging power source and the charging input terminal is reversed, the controllable precision voltage regulator VR1 is turned on, thereby making the gate voltage of the PMOS tube Q1 high through the resistor R9 and the resistor R8. At this time, the PMOS tube Q1 is turned off to disconnect the path between the charging input terminal and the charging management module; When the voltage value output by the charging power supply is greater than the first set threshold value, the controllable precision voltage regulator VR1 is turned on, and the transistor Q2 is turned off, so that the gate of the PMOS tube Q1 is at a high level. At this time, the PMOS tube Q1 is turned off to disconnect the path between the charging input terminal and the charging management module.

2. The electronic cigarette charging circuit according to claim 1, characterized in that: The voltage detection module is used to detect the voltage output by the charging power supply, and when the voltage value output by the charging power supply increases, the voltage value output by the voltage detection module also increases accordingly; The overvoltage protection module is used to control the anti-reverse connection module to switch to a disconnected state when the voltage value output by the voltage detection module is greater than a second set threshold value, so as to disconnect the path between the charging input terminal and the charging management module.

3. The electronic cigarette charging circuit according to claim 2, characterized in that: The voltage detection module includes a resistor R4 and a resistor R5; one end of the resistor R4 is connected to the positive electrode of the charging input terminal, and the other end of the resistor R4 is connected to the negative electrode of the charging input terminal through the resistor R5; the common end of the resistor R4 and the resistor R5 is also connected to the input end of the overvoltage protection module.

4. The electronic cigarette charging circuit according to any one of claims 1 to 3, characterized in that: The electronic cigarette charging circuit also includes a display module; the display module is used to prompt whether the circuit between the charging input terminal and the charging management module is connected.

5. The electronic cigarette charging circuit according to claim 4, characterized in that: The display module includes an electrolytic capacitor CD2, a capacitor C3, an electrolytic capacitor CD3, a diode D1 and a resistor R10; the cathode of the diode D1 is connected to the cathode of the charging input terminal, and the anode of the diode D1 is connected to the anti-reverse connection module through the resistor R10; the anode of the electrolytic capacitor CD2, one end of the capacitor C3, and the anode of the electrolytic capacitor CD3 are respectively connected to the anti-reverse connection module; the cathode of the electrolytic capacitor CD2, the other end of the capacitor C3, and the cathode of the electrolytic capacitor CD3 are respectively connected to the cathode of the charging input terminal.

6. An electronic cigarette, characterized in that: The electronic cigarette charging circuit comprises the electronic cigarette charging circuit as claimed in any one of claims 1 to 5.

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