Charging base, electronic cigarette and charging method

Abstract

The present invention discloses a charging base, comprising: a charging circuit and first and second electrodes connected thereto, the first and second electrodes being configured to output a charging voltage to a charged device; the charging circuit being configured to receive an input voltage, convert the input voltage to generate a charging voltage when the first and second electrodes are in a first state, and adjust the first and second electrodes to the first state when the first and second electrodes are in a second state, and then convert the input voltage to generate a charging voltage. When the charged device is charged via the charging circuit, the charging circuit converts the electrode polarity of the first and second electrodes to match that of the charged device, so that the first and second electrodes convert the input voltage to generate a charging voltage. Normal charging of the charged device can be achieved without re-rotating the charged device or the charging base, or changing the position of the electrodes.

Description

Technical Field

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

[0002] An electronic cigarette is a non-combustion alternative to tobacco products, comprising an electronic cigarette body and a charging base. In the prior art, both the battery inside the electronic cigarette body and the charging base have fixed positive and negative electrodes. When charging through the charging base, the positive and negative electrodes of the electronic cigarette battery are often reversed with the positive and negative electrodes of the charging base. At this time, charging cannot be performed, and the electronic cigarette or the charging base needs to be rotated again to change the position of the electrodes so that the polarity of the electrodes of the two are consistent, thereby achieving normal charging of the electronic cigarette body. This reduces the user experience and brings inconvenience to the charging process. Summary of the Invention

[0003] Based on this, it is necessary to propose a charging base to address the above problems.

[0004] The present invention provides a charging base, comprising:

[0005] A first electrode and a second electrode are used to output a charging voltage to the charged device; the first electrode and the second electrode have at least a first state and a second state; and

[0006] A charging circuit is connected to the first electrode and the second electrode, and is used to receive an input voltage and, when the first electrode and the second electrode are in the first state, convert the input voltage to generate the charging voltage; and when the first electrode and the second electrode are in the second state, adjust the first electrode and the second electrode to the first state and then convert the input voltage to generate the charging voltage.

[0007] In one embodiment, the first state is: the first electrode is negative and the second electrode is positive;

[0008] The second state is: the first electrode is a positive electrode, the voltage of the first electrode to ground is less than the input voltage, and the second electrode is a negative electrode.

[0009] In one embodiment, the charging circuit includes:

[0010] A voltage divider circuit is configured to receive the input voltage, divide the input voltage, and output a divided voltage; and

[0011] The level output circuit is connected to the voltage divider circuit and is used to make the first electrode and the second electrode a positive electrode and a negative electrode respectively based on the divided voltage.

[0012] In one embodiment, the charging circuit further includes:

[0013] The surge protection circuit is connected to the voltage divider circuit and the level output circuit, and is used to absorb surges and spikes generated when the level output circuit is momentarily short-circuited.

[0014] In one embodiment, the voltage divider circuit includes: a first resistor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor;

[0015] A first end of the first resistor is connected to the external power supply, and a second end of the first resistor is connected to the first ends of the second resistor and the third resistor;

[0016] The second end of the second resistor is connected to the level output circuit and the first end of the fifth resistor;

[0017] The second end of the third resistor is connected to the level output circuit and the first end of the fourth resistor;

[0018] The second end of the fourth resistor and the second end of the fifth resistor are both grounded.

[0019] In one embodiment, the level output circuit includes: a first MOS transistor, a second MOS transistor, a third MOS transistor and a fourth MOS transistor;

[0020] The gate of the first MOS transistor is connected to the voltage divider circuit and the drain of the second MOS transistor, the source of the first MOS transistor is connected to the external power supply, and the drain of the first MOS transistor is connected to the drain of the third MOS transistor;

[0021] The gate of the second MOS transistor is connected to the voltage divider circuit and the drain of the first MOS transistor, the source of the second MOS transistor is connected to the external power supply, and the drain of the second MOS transistor is connected to the drain of the fourth MOS transistor;

[0022] The gate of the third MOS transistor is connected to the second electrode, the source of the third MOS transistor is grounded, and the drain of the third MOS transistor is connected to the first electrode;

[0023] The gate of the fourth MOS transistor is connected to the first electrode, the source of the fourth MOS transistor is grounded, and the drain of the fourth MOS transistor is connected to the second electrode.

[0024] In one embodiment, the surge protection circuit includes: a first diode and a second diode;

[0025] The anode of the first diode is grounded, and the cathode of the first diode is connected to the drain of the first MOS transistor;

[0026] An anode of the second diode is grounded, and a cathode of the second diode is connected to a drain of the second MOS transistor.

[0027] An electronic cigarette, comprising: the charging base as described above and an electronic cigarette body;

[0028] The electronic cigarette body includes: a third state between the first electrode and the second electrode;

[0029] a clamping circuit, configured to clamp the voltage between the first electrode and the second electrode when the first electrode and the second electrode are in the third state, so as to switch the first electrode and the second electrode from the third state to the second state;

[0030] A power supply circuit is connected to the first electrode, the second electrode and a battery located in the electronic cigarette body, and is used to charge the battery using the charging voltage.

[0031] In one embodiment, the third state is: the first electrode is a positive electrode, the voltage of the first electrode to ground is the input voltage, and the second electrode is a negative electrode.

[0032] In one embodiment, the clamping circuit includes a third diode;

[0033] The anode of the third diode is connected to the negative electrode of the power supply circuit, and the cathode of the third diode is connected to the positive electrode of the power supply circuit.

[0034] In one embodiment, the power supply circuit includes: an overvoltage protection chip, a fifth MOS transistor and a sixth MOS transistor;

[0035] The input end of the overvoltage protection chip is connected to the voltage output by the charging circuit and serves as the positive electrode of the power supply circuit. The output end of the overvoltage protection chip is connected to the gate of the fifth MOS transistor.

[0036] The source of the fifth MOS transistor is grounded, and the drain of the fifth MOS transistor is connected to the gate of the sixth MOS transistor; the drain of the sixth MOS transistor is connected to the output end of the overvoltage protection chip, and the source of the sixth MOS transistor is connected to the battery.

[0037] A charging method, comprising:

[0038] When the voltage polarity between the first electrode and the second electrode of the charging base is consistent with the voltage polarity of the battery of the charged device, the first electrode and the second electrode of the charging base output a charging voltage to the charged device;

[0039] When the voltage polarity between the first electrode and the second electrode of the charging base is inconsistent with the voltage polarity of the battery, the clamping circuit of the charged device reduces the voltage between the first electrode and the second electrode, and then the charging circuit of the charging base converts the voltages of the first electrode and the second electrode to adjust the voltage polarity between the first electrode and the second electrode of the charging base to be consistent with the voltage polarity between the positive electrode and the negative electrode of the charged device, and then the first electrode and the second electrode of the charging base output the charging voltage to the charged device.

[0040] In one embodiment, after the voltage polarity between the first electrode and the second electrode of the charging base is consistent with the voltage polarity of the battery of the charged device, the charging method further includes:

[0041] collecting a node voltage of the charged device and comparing it with a preset voltage; if the node voltage is greater than the preset voltage, lighting an indicator light on the charged device to indicate that the charged device is being charged by the charging base;

[0042] If the node voltage is lower than the preset voltage, the indicator light is turned off to prompt the charged device that it is not charging.

[0043] The implementation of the present invention will have the following beneficial effects:

[0044] When a charged device is charged via the charging circuit of the charging base, if the polarity of the first and second electrodes connected to the charging circuit is inconsistent with that of the charged device, the charging circuit can convert the polarity of the first and second electrodes to match the polarity of the charged device, so that the first and second electrodes convert the input voltage to generate the charging voltage required by the charged device. This allows the charged device to be properly charged without rotating the charged device or the charging base, or changing the position of the electrodes. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0046] in:

[0047] Figure 1 is a block diagram of a charging base in one embodiment;

[0048] Figure 2 A circuit diagram of a charging base in one embodiment;

[0049] Figure 3 is a block diagram of an electronic cigarette in one embodiment;

[0050] Figure 4 FIG. 1 is a circuit diagram of an electronic cigarette body in one embodiment. FIG. DETAILED DESCRIPTION

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0052] The present invention provides a charging base, wherein the charged device is an electronic cigarette or other electronic product field, the electronic cigarette comprises an electronic cigarette body and a charging base for charging the electronic cigarette body, and the charging base is connected to an external power supply to realize charging of the electronic cigarette body; in the prior art, the battery inside the electronic cigarette body and the charging base both have their fixed positive and negative electrodes, and when charging through the charging base, there is often a situation where the positive and negative electrodes of the electronic cigarette battery are reversely connected to the positive and negative electrodes of the charging base, and the charging operation cannot be performed at this time. It is necessary to readjust the electrode direction of the electronic cigarette or the charging base to make the electrodes of the two consistent, thereby realizing normal charging of the electronic cigarette body, which will reduce the user experience and bring inconvenience to the charging process.

[0053] Figure 1 A block diagram of a charging base in one embodiment is shown in FIG. Figure 1 The charging base includes: a first electrode RELAY_A, a second electrode RELAY_B and a charging circuit 100; the first electrode RELAY_A and the second electrode RELAY_B are used to output a charging voltage to the charged device; the first electrode RELAY_A and the second electrode RELAY_B have at least a first state and a second state; and

[0054] The charging circuit 100 is connected to the first electrode RELAY_A and the second electrode RELAY_B, and is connected to an external power supply to receive the input voltage. When the first electrode RELAY_A and the second electrode RELAY_B are in the first state, the input voltage is converted to generate the charging voltage. When the first electrode RELAY_A and the second electrode RELAY_B are in the second state, the first electrode RELAY_A and the second electrode RELAY_B are adjusted to the first state, and then the input voltage is converted to generate the charging voltage.

[0055] In one embodiment, the first state is: the first electrode RELAY_A is negative, and the second electrode RELAY_B is positive; the second state is: the first electrode RELAY_A is positive, and the voltage of the first electrode RELAY_A to ground is less than the input voltage, and the second electrode RELAY_B is negative.

[0056] Specifically, taking the input voltage of 4.2V after the charging circuit 100 is connected to an external power supply as an example, when the first electrode RELAY_A is the negative electrode and the second electrode RELAY_B is the positive electrode; at the same time, when the charged device needs to be charged, its negative electrode is connected to the first electrode RELAY_A, and its positive electrode is connected to the second electrode RELAY_B. At this time, the positive and negative electrodes of the charged device are normally connected to the positive and negative electrodes of the charging base. Then, the charging circuit 100 converts the input voltage into the charging voltage required by the charging device to charge it.

[0057] When the first electrode RELAY_A is the positive electrode, the second electrode RELAY_B is the negative electrode, and the voltage of the first electrode RELAY_A to ground is much lower than the input voltage of 4.2V; at the same time, when the charged device needs to be charged, its negative electrode is connected to the first electrode RELAY_A, and its positive electrode is connected to the second electrode RELAY_B. At this time, the positive and negative electrodes of the charged device are reversed with the positive and negative electrodes of the charging base. The charging circuit 100 can pull down the voltage of the first electrode RELAY_A to 0V and pull up the voltage of the second electrode RELAY_B to 4.2V to achieve the above-mentioned conversion of the positive and negative electrodes of the charging base. When the charged device is charging, the polarities of the first electrode RELAY_A and the second electrode RELAY_B of the charging base correspond to the polarities of the charging device, so that the charging device is charged normally.

[0058] In one embodiment, the charging circuit 100 includes: a voltage divider circuit, a level output circuit, and a surge protection circuit; the voltage divider circuit is configured to receive an input voltage, divide the input voltage, and output the divided voltage. The level output circuit is connected to the voltage divider circuit and configured to set the first electrode RELAY_A and the second electrode RELAY_B to positive and negative poles, respectively, based on the divided voltage. The surge protection circuit is connected to the voltage divider circuit and the level output circuit and configured to absorb surges and spikes generated when the level output circuit is momentarily short-circuited.

[0059] Specifically, such as Figure 2 As shown, the voltage divider circuit includes: a first resistor F1, a second resistor R1, a third resistor R2, a fourth resistor R8 and a fifth resistor R9; the first end of the first resistor F1 is connected to the external power supply, and the second end of the first resistor F1 is connected to the second resistor R1 and the first end of the third resistor R2; the second end of the second resistor R1 is connected to the level output circuit and the first end of the fifth resistor R9; the second end of the third resistor R2 is connected to the level output circuit and the first end of the fourth resistor R8; the second end of the fourth resistor R8 and the second end of the fifth resistor R9 are both grounded.

[0060] The level output circuit includes: a first MOS transistor Q1, a second MOS transistor Q2, a third MOS transistor Q5 and a fourth MOS transistor Q6; the first MOS transistor Q1 and the second MOS transistor Q2 are P-MOS transistors, and the third MOS transistor Q5 and the fourth MOS transistor Q6 are N-MOS transistors; the gate of the first MOS transistor Q1 is connected to the voltage divider circuit and the drain of the second MOS transistor Q2, the source of the first MOS transistor Q1 is connected to the external power supply, and the drain of the first MOS transistor Q1 is connected to the drain of the third MOS transistor Q5; the gate of the second MOS transistor Q2 is connected to the voltage divider circuit and the drain of the second MOS transistor Q2. The drain of the first MOS transistor Q1 is connected to the external power supply, the source of the second MOS transistor Q2 is connected to the external power supply, and the drain of the second MOS transistor Q2 is connected to the drain of the fourth MOS transistor Q6; the gate of the third MOS transistor Q5 is connected to the second electrode RELAY_B, the source of the third MOS transistor Q5 is grounded, and the drain of the third MOS transistor Q5 is connected to the first electrode RELAY_A; the gate of the fourth MOS transistor Q6 is connected to the first electrode RELAY_A, the source of the fourth MOS transistor Q6 is grounded, and the drain of the fourth MOS transistor Q6 is connected to the second electrode RELAY_B.

[0061] The surge protection circuit includes: a first diode D3 and a second diode D4; the anode of the first diode D3 is grounded, the cathode of the first diode D3 is connected to the drain of the first MOS transistor Q1, the anode of the second diode D4 is grounded, and the cathode of the second diode D4 is connected to the drain of the second MOS transistor Q2.

[0062] The present invention also provides an electronic cigarette, such as Figure 3 As shown, it includes: the charging base and the electronic cigarette body as described above; there is also a third state between the first electrode and the second electrode; the electronic cigarette body includes: a clamping circuit 200 and a power supply circuit 300; the clamping circuit 200 is used to clamp the voltage between the first electrode RELAY_A and the second electrode RELAY_B when the first electrode RELAY_A and the second electrode RELAY_B are in the third state, so that the first electrode RELAY_A and the second electrode RELAY_B are switched from the third state to the second state; the power supply circuit 300 is connected to the first electrode RELAY_A, the second electrode RELAY_B and the battery located in the electronic cigarette body, and is used to charge the battery using the charging voltage.

[0063] Based on the above description of the charging base, it can be seen that there is a first state and a second state between the first electrode RELAY_A and the second electrode RELAY_B, and there is also a third state, where the third state is: the first electrode RELAY_A is positive, and the voltage of the first electrode RELAY_A to the ground is the input voltage (4.2V), and the second electrode RELAY_B is negative. Figure 4 As shown, the clamping circuit 200 includes a third diode D2 ; an anode of the third diode D2 is connected to the cathode PGND of the power supply circuit 300 , and a cathode of the third diode D2 is connected to the anode VBAT_IN of the power supply circuit 300 .

[0064] In combination with the circuit structure of the aforementioned charging base, the first state, the second state, and the third state between the first electrode RELAY_A and the second electrode RELAY_B, and the case where the charged device in this embodiment is an electronic cigarette body, the polarity conversion principle of the first electrode RELAY_A and the second electrode RELAY_B is described in detail as follows:

[0065] After the charging base is connected to an external power source and the electronic cigarette body is not charged, refer to Figure 2The first MOS transistor Q1 and the second MOS transistor Q2 in the charging circuit 100 in the charging base may have deviations in their respective capacitances during the manufacturing process. For example, if the capacitance of the first MOS transistor Q1 is smaller than that of the second MOS transistor Q2, the first MOS transistor Q1 is smaller and is turned on first; the first electrode RELAY_A connected to the drain of the first MOS transistor Q1 is a positive electrode, and the voltage of the first electrode RELAY_A to the ground is the input voltage (4.2V). The second electrode RELAY_B connected to the drain of the second MOS transistor Q2 is a negative electrode, that is, the first electrode RELAY_A and the second electrode RELAY_B are connected. LAY_B is in the third state; at this time, if the negative electrode PGND of the electronic cigarette body is connected to the first electrode RELAY_A, and the positive electrode VBAT_IN of the electronic cigarette body is connected to the second electrode RELAY_B, then the clamping circuit 200 in the electronic cigarette body, that is, the third diode D2, is equivalent to being connected in series between the first electrode RELAY_A and the second electrode RELAY_B. Since the cut-off voltage of the third diode D2 is relatively small, the cut-off voltage of the third diode D2 in the present invention is 0.3V, then the voltage of the first electrode RELAY_A to ground is instantly pulled down from 4.2V to 0.3V, and ... Figure 2 It can be seen that the gate voltage of the second MOS transistor Q2 is the ground voltage (0.3V) of the first electrode RELAY_A at this time. Because the source voltage of the second MOS transistor Q2 is the input voltage (4.2V), and since the second MOS transistor Q2 is a P-MOS transistor, the gate voltage is lower than the source voltage. Therefore, the second MOS transistor Q2 is turned on. Therefore, the drain voltage of the second MOS transistor Q2 is the input voltage (4.2V). Since the gate of the first MOS transistor Q1 is connected to the drain of the second MOS transistor Q2, the gate voltage of the first MOS transistor Q1 is the input voltage (4.2V). Since the source voltage of the first MOS transistor Q1 is also the input voltage (4.2V), the first MOS transistor Q1 is turned off. Moreover, since the drain of the second MOS transistor Q2 is connected to the second electrode RELAY_B, the voltage of the second electrode RELAY_B is also the input voltage (4.2V), causing the second electrode RELAY_B to be converted from a negative electrode to a positive electrode.

[0066] At the same time, since the gate of the third MOS transistor Q5 is connected to the second electrode RELAY_B, the voltage of the gate of the third MOS transistor Q5 is the input voltage (4.2V). Since the source of the third MOS transistor Q5 is grounded and the third MOS transistor Q5 is an N-MOS transistor, its gate voltage is greater than the source voltage. Therefore, the third MOS transistor Q5 is turned on, the drain of the third MOS transistor Q5 is grounded, and the first electrode RELAY_A is also grounded, thereby achieving the process of converting the first electrode RELAY_A from a positive electrode to a negative electrode.

[0067] In the above process, the first electrode RELAY_A is converted from a positive electrode to a negative electrode, and the second electrode RELAY_B is converted from a negative electrode to a positive electrode. At this time, they are correspondingly connected to the positive and negative electrodes of the connected electronic cigarette body to achieve normal charging.

[0068] In one embodiment, Figure 4 As shown, the power supply circuit 300 includes: an overvoltage protection chip U1, a fifth MOS transistor Q3, a sixth MOS transistor Q4, a capacitor C1 and a transient suppression diode D1; the fifth MOS transistor Q3 is a P-MOS transistor, and the sixth MOS transistor Q4 is an N-MOS transistor; the input end of the overvoltage protection chip U1 is connected to the voltage output by the charging circuit 100, which is the positive electrode VBAT_IN of the power supply circuit 300, and the output end of the overvoltage protection chip U1 is connected to the gate of the fifth MOS transistor Q3; the gate of the fifth MOS transistor Q3 The source is grounded, the drain of the fifth MOS transistor Q3 is connected to the gate of the sixth MOS transistor Q4; the drain of the sixth MOS transistor Q4 is connected to the output end of the overvoltage protection chip U1, and the source of the sixth MOS transistor Q4 is connected to a battery; the capacitor C1 is connected between the gate of the sixth MOS transistor Q4 and ground; the anode of the transient suppression diode D1 is connected to the negative electrode PGND of the power supply circuit 300, and the cathode of the transient suppression diode D1 is connected to the positive electrode VBAT_IN of the power supply circuit 300.

[0069] Specifically, when the battery of the electronic cigarette body is normally charged through the charging base, since the gate of the sixth MOS transistor Q4 is connected to the positive electrode VBAT_IN of the power supply circuit 300 and the source of the sixth MOS transistor Q4 is grounded, the sixth MOS transistor Q4 is turned on, and the drain of the sixth MOS transistor Q4 is grounded, that is, the gate of the fifth MOS transistor Q3 is grounded. Since the source of the fifth MOS transistor Q3 is connected to the battery of the electronic cigarette body, the tertiary voltage of the fifth MOS transistor Q3 is less than the source voltage, and the source of the fifth MOS transistor Q3 is turned on, and the positive electrode VBAT_IN of the power supply circuit 300 is connected to the charging voltage of the charging circuit, and is transmitted to the input terminal VBAT1 of the battery through the fifth MOS transistor Q3 for charging.

[0070] The overvoltage protection chip U1 can prevent the power supply circuit 300 from being damaged when the external voltage is too high; the transient suppression diode D1 can absorb the surge spike generated by the power supply circuit 300 when it is charged by the charging circuit, thereby improving product reliability; the capacitor C1 prevents interference from being contained in the voltage in the charging circuit, thereby preventing the interference from causing the sixth MOS transistor Q4 to be mis-conducted, and then causing the fifth MOS transistor Q3 to be mis-conducted, resulting in a high voltage at the node CE used to indicate whether the indicator light is on or off (the indicator light is set on the electronic cigarette body to indicate whether the electronic cigarette body is charged), causing the indicator light to be constantly on, resulting in the electronic cigarette body being mistakenly indicated as being in the charging state.

[0071] A charging method, comprising:

[0072] When the voltage polarity between the first electrode RELAY_A and the second electrode RELAY_B of the charging base is consistent with the voltage polarity of the battery of the charged device, the first electrode RELAY_A and the second electrode RELAY_B of the charging base output a charging voltage to the charged device; the charged device here is the electronic cigarette.

[0073] When the voltage polarity between the first electrode RELAY_A and the second electrode RELAY_B of the charging base is inconsistent with the voltage polarity of the battery, the clamping circuit 200 of the charged device reduces the voltage between the first electrode RELAY_A and the second electrode RELAY_B. Then, the charging circuit 100 of the charging base converts the voltages of the first electrode RELAY_A and the second electrode RELAY_B to adjust the voltage polarity between the first electrode RELAY_A and the second electrode RELAY_B of the charging base to be consistent with the voltage polarity between the positive and negative electrodes of the charged device. Then, the first electrode RELAY_A and the second electrode RELAY_B of the charging base output the charging voltage to the charged device.

[0074] In another embodiment, after the voltage levels output by the first electrode RELAY_A and the second electrode RELAY_B of the charging base are consistent with the positive and negative electrodes of the charged device, the charging method further includes:

[0075] The node voltage of the device being charged is collected by the single-chip microcomputer, and the voltage of the battery of the electronic cigarette body is collected by the single-chip microcomputer through AD sampling. In this embodiment, the device being charged is the electronic cigarette body, and the node voltage is the voltage of the node CE in the power supply circuit of the electronic cigarette body. The voltage of the node CE is compared with a preset voltage, and the preset voltage is 0.7 times the battery voltage. That is, when the voltage of the node CE is greater than 0.7 times the battery voltage, the single-chip microcomputer controls the indicator light to light up to indicate that the electronic cigarette body is charging;

[0076] If the voltage of the node CE is less than 0.7 times the battery voltage, the indicator light is turned off to prompt the charged device that it is not charging.

[0077] The above disclosure is merely a preferred embodiment of the present invention and certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. An electronic cigarette, characterized in that: include: Charging base and electronic cigarette body; The charging base includes: A first electrode and a second electrode are used to output a charging voltage to the electronic cigarette body; the first electrode and the second electrode have at least a first state and a second state; and a charging circuit connected to the first electrode and the second electrode, configured to receive an input voltage and, when the first electrode and the second electrode are in the first state, convert the input voltage to generate the charging voltage; and, when the first electrode and the second electrode are in the second state, adjust the first electrode and the second electrode to the first state, and then convert the input voltage to generate the charging voltage; There is also a third state between the first electrode and the second electrode; The electronic cigarette body includes: a clamping circuit, configured to clamp the voltage between the first electrode and the second electrode when the first electrode and the second electrode are in the third state, so as to switch the first electrode and the second electrode from the third state to the second state; a power supply circuit connected to the first electrode, the second electrode, and a battery located in the electronic cigarette body, and configured to charge the battery using the charging voltage; The first state is: the first electrode is a negative electrode, and the second electrode is a positive electrode; The second state is: the first electrode is positive, the voltage of the first electrode to ground is less than the input voltage, and the second electrode is negative; The third state is: the first electrode is a positive electrode, the voltage of the first electrode to ground is the input voltage, and the second electrode is a negative electrode; The charging circuit includes: A voltage divider circuit is configured to receive the input voltage, divide the input voltage, and output a divided voltage; and The level output circuit is connected to the voltage divider circuit and is used to make the first electrode and the second electrode a positive electrode and a negative electrode respectively based on the divided voltage.

2. The electronic cigarette according to claim 1, characterized in that The charging circuit further includes: The surge protection circuit is connected to the voltage divider circuit and the level output circuit, and is used to absorb surges and spikes generated when the level output circuit is momentarily short-circuited.

3. The electronic cigarette according to claim 1, characterized in that The voltage divider circuit includes: a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor; A first end of the first resistor is connected to an external power source, and a second end of the first resistor is connected to first ends of the second resistor and the third resistor; The second end of the second resistor is connected to the level output circuit and the first end of the fifth resistor; The second end of the third resistor is connected to the level output circuit and the first end of the fourth resistor; The second end of the fourth resistor and the second end of the fifth resistor are both grounded.

4. The electronic cigarette according to claim 2, characterized in that The level output circuit includes: a first MOS transistor, a second MOS transistor, a third MOS transistor and a fourth MOS transistor; The gate of the first MOS transistor is connected to the voltage divider circuit and the drain of the second MOS transistor, the source of the first MOS transistor is connected to an external power supply, and the drain of the first MOS transistor is connected to the drain of the third MOS transistor; The gate of the second MOS transistor is connected to the voltage divider circuit and the drain of the first MOS transistor, the source of the second MOS transistor is connected to the external power supply, and the drain of the second MOS transistor is connected to the drain of the fourth MOS transistor; The gate of the third MOS transistor is connected to the second electrode, the source of the third MOS transistor is grounded, and the drain of the third MOS transistor is connected to the first electrode; The gate of the fourth MOS transistor is connected to the first electrode, the source of the fourth MOS transistor is grounded, and the drain of the fourth MOS transistor is connected to the second electrode.

5. The electronic cigarette according to claim 4, characterized in that The surge protection circuit includes: a first diode and a second diode; The anode of the first diode is grounded, and the cathode of the first diode is connected to the drain of the first MOS transistor; An anode of the second diode is grounded, and a cathode of the second diode is connected to a drain of the second MOS transistor.

6. The electronic cigarette according to claim 1, characterized in that The clamping circuit includes a third diode; The anode of the third diode is connected to the negative electrode of the power supply circuit, and the cathode of the third diode is connected to the positive electrode of the power supply circuit.

7. The electronic cigarette according to claim 6, characterized in that The power supply circuit includes: an overvoltage protection chip, a fifth MOS transistor and a sixth MOS transistor; The input end of the overvoltage protection chip is connected to the voltage output by the charging circuit and serves as the positive electrode of the power supply circuit. The output end of the overvoltage protection chip is connected to the gate of the fifth MOS transistor. The source of the fifth MOS transistor is grounded, and the drain of the fifth MOS transistor is connected to the gate of the sixth MOS transistor; the drain of the sixth MOS transistor is connected to the output end of the overvoltage protection chip, and the source of the sixth MOS transistor is connected to the battery.

8. A charging method, characterized in that: Applied to the electronic cigarette according to any one of claims 1 to 7, the charging method comprises: When the voltage polarity between the first electrode and the second electrode of the charging base is consistent with the voltage polarity of the battery of the electronic cigarette body, the first electrode and the second electrode of the charging base output a charging voltage to the electronic cigarette body; When the voltage polarity between the first electrode and the second electrode of the charging base is inconsistent with the voltage polarity of the battery, the clamping circuit of the electronic cigarette body reduces the voltage between the first electrode and the second electrode, and then the charging circuit of the charging base converts the voltages of the first electrode and the second electrode to adjust the voltage polarity between the first electrode and the second electrode of the charging base to be consistent with the voltage polarity between the positive and negative electrodes of the electronic cigarette body, and then the first electrode and the second electrode of the charging base output the charging voltage to the electronic cigarette body.

9. The charging method according to claim 8, characterized in that: After the voltage polarity between the first electrode and the second electrode of the charging base is consistent with the voltage polarity of the battery of the electronic cigarette body, the charging method further includes: collecting a node voltage of the electronic cigarette body and comparing it with a preset voltage; if the node voltage is greater than the preset voltage, lighting an indicator light on the electronic cigarette body to indicate that the electronic cigarette body is being charged through the charging base; If the node voltage is lower than the preset voltage, the indicator light is turned off to indicate that the electronic cigarette body is not being charged.

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