Electronic cigarette charging box boost circuit and electronic cigarette charging device

Abstract

The electronic cigarette charging box voltage boosting circuit comprises a voltage boosting control module and a filter protection module. The voltage boosting control module is composed of a first electronic switch tube and a switch assembly. One end of the first electronic switch tube is connected with an external power input end, the control end of the first electronic switch tube is connected with a first end of the switch assembly, the control end of the switch assembly is connected with the external power input end, and the second end of the switch assembly is connected with the ground. One end of the filter protection module is connected with an external power output end and an output end of the voltage boosting control module, and the other end of the filter protection module is connected with an electronic cigarette rod charging end. The circuit uses the bypass conduction function of the first electronic switch tube to make the charging voltage input by the external power directly bypass from the power input end to the rod charging end, thereby reducing the voltage loss of the intermediate link. When the charger simultaneously charges the charging box and the rod, the problem that the voltage of the rod charging end is pulled down can be effectively solved, the charging efficiency of the electronic cigarette rod is improved, and the charging time is shortened.

Description

Technical Field

[0001] This disclosure relates to the technical field of electronic cigarette charging, and in particular to a boost circuit for an electronic cigarette charging case and an electronic cigarette charging device. Background Technology

[0002] In existing e-cigarette charging technologies, a charger is typically used to charge both the charging case and the e-cigarette device simultaneously. However, this charging method reveals a significant problem in practical applications. When the charger supplies power to both the charging case and the e-cigarette device at the same time, the voltage at the charging end of the e-cigarette device often becomes insufficient due to limitations in circuit design and power distribution.

[0003] From a circuit principle perspective, the charging case contains its own charging circuit and energy storage components. During simultaneous charging, some electrical energy is used to charge the charging case's battery and maintain its internal circuitry, resulting in a lower voltage distribution to the charging terminal of the e-cigarette. With the charging resistance of the e-cigarette remaining relatively constant, this voltage reduction directly leads to a decrease in charging current. In practical use, this lower charging current results in slower charging speeds, prolonging charging time and reducing the convenience of using e-cigarettes. Utility Model Content

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide an electronic cigarette charging box boost circuit and electronic cigarette charging device that improves the charging voltage at the charging end of the cigarette holder by introducing a bypass.

[0005] The purpose of this disclosure is achieved through the following technical solution:

[0006] A boost circuit for an electronic cigarette charging case includes a boost control module and a filter protection module. The boost control module includes a first electronic switch and a switch assembly. A first terminal of the first electronic switch is connected to an external power input terminal. A control terminal of the first electronic switch is connected to a first terminal of the switch assembly. A control terminal of the switch assembly is connected to an external power input terminal. A second terminal of the switch assembly is grounded.

[0007] The first end of the filtering protection module is connected to the output end of the external power supply and the second end of the first electronic switch tube, respectively, and the second end of the filtering protection module is used to connect to the charging end of the electronic cigarette rod.

[0008] In one embodiment, the first electronic switch is a P-channel MOS transistor.

[0009] In one embodiment, the boost control module further includes a first voltage divider resistor, a first end of which is connected to the external power input terminal, and a second end of which is connected to the control terminal of the switching assembly.

[0010] In one embodiment, the first voltage divider resistor is an adjustable resistor.

[0011] In one embodiment, the boost control module further includes a pull-up resistor, the first end of which is connected to the control terminal of the first electronic switch, and the second end of which is connected to the second terminal of the first electronic switch.

[0012] In one embodiment, the switching assembly includes a second electronic switch and a second voltage divider resistor. A first terminal of the second electronic switch is connected to a control terminal of the first electronic switch. The control terminal of the second electronic switch is used to connect to an external power input terminal. A second terminal of the second electronic switch is grounded. A first terminal of the second voltage divider resistor is connected to the control terminal of the second electronic switch. A second terminal of the second voltage divider resistor is grounded.

[0013] In one embodiment, the second electronic switch is an N-channel MOS transistor.

[0014] In one embodiment, the filtering protection module includes a filtering capacitor and an anti-static component. The first end of the filtering capacitor and the first end of the anti-static component are connected to the charging terminal of the electronic cigarette, and the second end of the filtering capacitor is grounded.

[0015] In one embodiment, the anti-static component includes at least one transient voltage suppression diode, one end of which is connected to the charging terminal of the electronic cigarette's motor, and the other end of which is grounded.

[0016] This application also provides an electronic cigarette charging device, including the electronic cigarette charging box boost circuit described in any of the above embodiments.

[0017] Compared with the prior art, this disclosure has at least the following advantages:

[0018] The aforementioned boost circuit for the electronic cigarette charging case, through the bypass conduction effect formed by the first electronic switch, allows the charging voltage input from the external power supply to be directly bypassed from the power input terminal to the charging terminal of the e-cigarette, reducing voltage loss in intermediate stages. This effectively solves the problem of voltage drop at the charging terminal of the e-cigarette when the charger is simultaneously charging the charging case and the e-cigarette, improving the charging efficiency of the e-cigarette and shortening the charging time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a circuit diagram of a boost circuit for an electronic cigarette charging case according to one embodiment. Detailed Implementation

[0021] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0023] Unless otherwise defined, 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 disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0025] like Figure 1 As shown, an embodiment of the electronic cigarette charging case boost circuit 10 of this disclosure includes a boost control module 100 and a filter protection module 200. The boost control module 100 includes a first electronic switch Q1 and a switch assembly. The first end of the first electronic switch Q1 is used to connect to the external power input terminal Vin. The control terminal of the first electronic switch Q1 is connected to the first end of the switch assembly. The control terminal of the switch assembly is used to connect to the external power input terminal Vin. The second end of the switch assembly is grounded.

[0026] The first end of the filter protection module 200 is connected to the output terminal VOUT of the external power supply and the second end of the first electronic switch Q1, respectively. The second end of the filter protection module 200 is used to connect to the charging terminal O+ of the electronic cigarette.

[0027] In this embodiment, when the electronic cigarette charging case is connected to the external power input terminal Vin for charging, since the control terminal of the switching assembly is connected to the external power input terminal Vin, the external power input voltage is applied to the control terminal of the switching assembly, making the voltage at the control terminal of the switching assembly greater than its conduction threshold voltage, and the switching assembly is in a conducting state. Because the control terminal of the first electronic switch Q1 is connected to the first terminal of the switching assembly, and the second terminal of the switching assembly is grounded, when the switching assembly is turned on, the voltage at the control terminal of the first electronic switch Q1 will form a loop through the switching assembly and the ground terminal, allowing the control terminal of the first electronic switch Q1 to obtain a level signal, and the first electronic switch Q1 is turned on. At this time, the input voltage Vin is output to the output terminal VOUT and the first terminal of the filter protection module 200 through the first electronic switch Q1. Next, the filtering and protection module 200 filters the voltage and outputs it to the charging terminal O+ of the e-cigarette. This bypasses the voltage drop circuit that may exist inside the e-cigarette charging box and ensures that the charging terminal O+ of the e-cigarette receives sufficient voltage first.

[0028] The aforementioned boost circuit 10 for the electronic cigarette charging case, through the bypass conduction effect formed by the first electronic switch Q1, allows the charging voltage input from the external power supply to be directly bypassed from the power input terminal to the charging terminal of the e-cigarette, reducing voltage loss in intermediate stages. This effectively solves the problem of voltage drop at the charging terminal of the e-cigarette when the charger is simultaneously charging the charging case and the e-cigarette, improving the charging efficiency of the e-cigarette and shortening the charging time.

[0029] like Figure 1As shown, in one embodiment, the first electronic switch Q1 is a P-channel MOSFET. In this embodiment, the first terminal of the first electronic switch Q1 is the source of the P-channel MOSFET, the second terminal of the first electronic switch Q1 is the drain of the P-channel MOSFET, and the control terminal of the first electronic switch Q1 is the gate of the P-channel MOSFET. When an external power supply input voltage Vin is applied, since the source of the first electronic switch Q1 and the control terminal of the switching assembly are respectively connected to the input terminal Vin of the external power supply, the switching assembly is turned on. At the same time, the gate of the first electronic switch Q1 is connected to the ground terminal. At this time, a negative voltage difference is formed between the gate and the source, which satisfies the conduction condition of the P-channel MOSFET, allowing the first electronic switch Q1 to quickly enter the conduction state. This allows the input voltage of the external power supply to be directly bypassed and output to the charging terminal O+ of the electronic cigarette through the first electronic switch Q1, thereby making the charging voltage of the electronic cigarette closer to the input voltage Vin and reducing voltage loss. On the other hand, the reverse cutoff characteristic of the P-channel MOSFET can effectively block reverse current. When the external power supply is disconnected, the difference between the gate voltage and the source voltage of the first electronic switch Q1 disappears, and the first electronic switch Q1 is quickly turned off, preventing the current of the battery inside the cigarette holder or charging box from being discharged in reverse to the external power supply through Q1, thus playing a role in reverse charging protection. There is no need to add an additional reverse diode, thereby saving circuit space and reducing production costs.

[0030] like Figure 1 As shown, in one embodiment, the boost control module 100 further includes a first voltage divider resistor R1. The first end of the first voltage divider resistor R1 is connected to the external power input terminal Vin, and the second end of the first voltage divider resistor R1 is connected to the control terminal of the switching assembly. In this embodiment, when the voltage at the external power input terminal Vin fluctuates or a higher voltage power supply is connected, R1 can reduce the actual voltage applied to the control terminal of the switching assembly through its voltage divider function, preventing damage caused by the voltage at the control terminal of the switching assembly exceeding its withstand voltage limit due to excessively high input voltage. Furthermore, the first voltage divider resistor R1 can also limit the loop current through its own resistance value, preventing the surge current generated at the moment of power connection from flowing into the control terminal of the switching assembly and damaging the components inside the switching assembly. This ensures that the current flowing into the control terminal of the switching assembly is always within a safe range, thereby reducing the circuit failure rate.

[0031] like Figure 1As shown, in one embodiment, the first voltage divider resistor R1 is an adjustable resistor. In this embodiment, when the external power supply voltage is high, by increasing the resistance value of the adjustable resistor R1, the actual voltage applied to the control terminal of the switching component will decrease accordingly based on the voltage divider principle. This prevents the voltage at the control terminal of the switching component from exceeding its withstand voltage limit due to excessively high input voltage, effectively protecting the switching component. Conversely, when the external power supply voltage is low, the resistance value of the adjustable resistor R1 is decreased so that the voltage applied to the control terminal of the switching component meets its conduction threshold requirement, ensuring normal conduction of the switching component. This, in turn, ensures that the entire boost circuit can operate stably, providing a suitable charging voltage for the electronic cigarette device.

[0032] like Figure 1 As shown, in one embodiment, the boost control module 100 further includes a pull-up resistor R3. The first end of the pull-up resistor R3 is connected to the control terminal of the first electronic switch Q1, and the second end of the pull-up resistor R3 is connected to the second terminal of the first electronic switch Q1. In this embodiment, when the electronic cigarette charging case is not connected to an external power source or is in standby mode, the control terminal of the first electronic switch Q1 may be in a floating state. The floating control terminal is easily affected by external interference signals, causing the first electronic switch Q1 to be falsely triggered and turned on, resulting in unnecessary power loss and potentially affecting the normal operation of the electronic cigarette charging case and the device. The presence of the pull-up resistor R3 can pull the control terminal level to a certain value, preventing the control terminal from being in a floating state, effectively preventing the false triggering of the first electronic switch Q1, and improving the circuit's anti-interference capability.

[0033] like Figure 1As shown, in one embodiment, the switching assembly includes a second electronic switch Q2 and a second voltage divider resistor R2. The first end of the second electronic switch Q2 is connected to the control end of the first electronic switch Q1. The control end of the second electronic switch Q2 is used to connect to the external power input terminal Vin. The second end of the second electronic switch Q2 is grounded. The first end of the second voltage divider resistor R2 is connected to the control end of the second electronic switch Q2. The second end of the second voltage divider resistor R2 is grounded. In this embodiment, when the external power input terminal Vin is connected to a voltage, the voltage is divided by the second voltage divider resistor R2 and applied to the control terminal of the second electronic switch Q2. If the voltage is greater than the conduction threshold of the second electronic switch Q2, the second electronic switch Q2 will quickly conduct, forming a path between the second electronic switch Q2 and the ground terminal, thereby pulling the control terminal of the first electronic switch Q1 to a low level to meet the conduction condition of the first electronic switch Q1P-channel MOSFET, ensuring that the input voltage Vin can be bypassed and output to the charging terminal O+ of the cigarette rod through the first electronic switch Q1. When the input voltage Vin is disconnected, the voltage at the control terminal of the second electronic switch Q2 drops below the threshold, the second electronic switch Q2 is turned off, and the first electronic switch Q1 is also turned off, thereby achieving reliable shutdown of the bypass path.

[0034] Furthermore, the second voltage divider resistor R2 and the input impedance of the control terminal of the second electronic switch Q2 form a voltage divider circuit. When Vin fluctuates or is connected to an excessively high voltage, it can reduce the actual voltage applied to the control terminal of the second electronic switch Q2, preventing the second electronic switch Q2 from being damaged due to overvoltage, thereby improving the voltage withstand capability of the switching assembly. On the other hand, the second voltage divider resistor R2 can limit the current flowing into the control terminal of the second electronic switch Q2, preventing the surge current at the moment of power supply connection from directly impacting the control electrode of Q2, playing a current limiting protection role, and further improving the turn-off reliability of the circuit.

[0035] like Figure 1As shown, in one embodiment, the second electronic switch Q2 is an N-channel MOSFET. In this embodiment, the first terminal of the second electronic switch Q2 is the drain of the N-channel MOSFET, the second terminal of the second electronic switch Q2 is the source of the N-channel MOSFET, and the control terminal of the second electronic switch Q2 is the gate of the N-channel MOSFET. The conduction condition of the N-channel MOSFET is that the gate voltage is higher than the source voltage. Since the source of the second electronic switch Q2 is connected to the ground terminal, when the external power supply input terminal Vin is connected to the ground, Vin is divided by the second voltage divider resistor R2, forming a stable gate voltage Vg at the gate of the second electronic switch Q2. When Vg is higher than the conduction threshold Vth of the second electronic switch Q2, a low-impedance path is quickly formed between the drain and source of Q2, i.e., the conduction state. At this time, since the gate of the first electronic switch Q1 is connected to the drain of the second electronic switch Q2, and the gate of the first electronic switch Q1 is directly grounded through the drain-source path of the second electronic switch Q2, the gate voltage of the first electronic switch Q1 is pulled down to close to 0V. Since the first electronic switch Q1 is a P-channel MOSFET and its gate voltage is close to 0V, and its source is connected to the external power input terminal Vin, a negative voltage difference is formed between the source and the gate. The absolute value of this voltage difference is greater than the conduction threshold of the first electronic switch Q1, thereby ensuring that the first electronic switch Q1 can be turned on quickly. This allows the input voltage Vin to bypass to the filter protection module 200 through the first electronic switch Q1, providing a charging voltage close to Vin to the charging terminal O+ of the cigarette rod, further reducing the voltage loss of the bypass path.

[0036] like Figure 1 As shown, in one embodiment, the filter protection module 200 includes a filter capacitor C1 and an anti-static component. The first terminal of the filter capacitor C1 and the first terminal of the anti-static component are connected to the charging terminal O+ of the electronic cigarette, and the second terminal of the filter capacitor C1 is grounded. In this embodiment, the filter capacitor C1 utilizes its DC-blocking and AC-passing characteristics to effectively filter out high-frequency ripple and noise mixed in the voltage transmitted to the charging terminal O+ of the electronic cigarette via the bypass of the first electronic switch Q1. Specifically, when the input voltage Vin is output to the filter protection module 200 through Q1, the input voltage may carry pulse interference at the moment of power connection or high-frequency harmonics generated by circuit switching. These interferences can cause unstable charging voltage of the electronic cigarette, affecting charging efficiency and even damaging the charging management chip inside the electronic cigarette. The filter capacitor C1, by storing and releasing charge, can smooth voltage fluctuations, maintain a stable DC characteristic of the voltage output to O+, and ensure that the electronic cigarette obtains a stable charging voltage, thereby improving the stability and safety of the charging process.

[0037] On the other hand, the anti-static component and the filter capacitor C1 are connected together at O+, which can specifically resist damage to the circuit caused by external electrostatic interference. During daily use of e-cigarettes, static electricity can be generated by inserting and removing the device from the charging case, and by human contact. If static electricity directly enters the circuit through the charging terminal O+, it may damage semiconductor devices such as the first electronic switch Q1 and the second electronic switch Q2, or sensitive components inside the device, leading to circuit failure. Under normal operating conditions, the anti-static component exhibits high resistance and does not affect the charging voltage transmission. When an electrostatic pulse occurs, its impedance rapidly decreases, discharging the static charge through the grounding terminal, clamping the voltage at the charging terminal O+ within a safe range, and preventing electrostatic energy from impacting the core components of the circuit.

[0038] like Figure 1 As shown, in one embodiment, the anti-static component includes at least one transient voltage suppression diode D1. One end of the transient voltage suppression diode D1 is connected to the charging terminal O+ of the e-cigarette, and the other end is grounded. In this embodiment, when external static electricity exists, such as static electricity from friction when inserting or removing the e-cigarette, static electricity generated by human contact, or when a transient overvoltage enters through the charging terminal O+, the transient voltage suppression diode D1 can switch from a high-resistance state to a low-resistance state in a very short time, clamping the voltage of the transient voltage suppression diode D1 below its breakdown voltage. Simultaneously, the transient voltage suppression diode D1 can discharge a large amount of transient current through the ground terminal, quickly dissipating the energy of static electricity or overvoltage, preventing excessively high voltage from being conducted to the first electronic switch Q1, the second electronic switch Q2, and the internal chip of the e-cigarette, thereby improving the stability of the boost circuit of the e-cigarette charging case.

[0039] This application also provides an electronic cigarette charging device, including the electronic cigarette charging case boost circuit 10 of any of the above embodiments. In this embodiment, when the electronic cigarette charging case is connected to the external power input terminal Vin for charging, since the control terminal of the switching component is connected to the external power input terminal Vin, the external power input voltage is applied to the control terminal of the switching component, making the control terminal voltage of the switching component greater than its conduction threshold voltage, and the switching component is in a conducting state. Since the control terminal of the first electronic switch Q1 is connected to the first terminal of the switching component, and the second terminal of the switching component is grounded, when the switching component is turned on, the control terminal voltage of the first electronic switch Q1 will form a loop through the switching component and the ground terminal, so that the control terminal of the first electronic switch Q1 obtains a level signal, and the first electronic switch Q1 is turned on. At this time, the input voltage Vin is output to the output terminal VOUT and the first terminal of the filter protection module 200 through the first electronic switch Q1. Next, the filtering and protection module 200 filters the voltage and outputs it to the charging terminal O+ of the e-cigarette. This bypasses the voltage drop circuit that may exist inside the e-cigarette charging box and ensures that the charging terminal O+ of the e-cigarette receives sufficient voltage first.

[0040] Compared with the prior art, this disclosure has at least the following advantages:

[0041] The aforementioned boost circuit 10 for the electronic cigarette charging case, through the bypass conduction effect formed by the first electronic switch Q1, allows the charging voltage input from the external power supply to be directly bypassed from the power input terminal to the charging terminal of the e-cigarette, reducing voltage loss in intermediate stages. This effectively solves the problem of voltage drop at the charging terminal of the e-cigarette when the charger is simultaneously charging the charging case and the e-cigarette, improving the charging efficiency of the e-cigarette and shortening the charging time.

[0042] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. An electronic cigarette charging case boost circuit, characterized in that, It includes a boost control module and a filter protection module. The boost control module includes a first electronic switch and a switch assembly. The first end of the first electronic switch is used to connect to an external power input terminal. The control terminal of the first electronic switch is connected to the first end of the switch assembly. The control terminal of the switch assembly is used to connect to the external power input terminal. The second end of the switch assembly is grounded. The first end of the filtering protection module is connected to the output end of the external power supply and the second end of the first electronic switch tube, respectively, and the second end of the filtering protection module is used to connect to the charging end of the electronic cigarette rod.

2. The boost circuit for the electronic cigarette charging case according to claim 1, characterized in that, The first electronic switch is a P-channel MOS transistor.

3. The boost circuit for the electronic cigarette charging case according to claim 1, characterized in that, The boost control module further includes a first voltage divider resistor, the first end of which is connected to the external power input terminal, and the second end of which is connected to the control terminal of the switching assembly.

4. The boost circuit for the electronic cigarette charging case according to claim 3, characterized in that, The first voltage divider resistor is an adjustable resistor.

5. The boost circuit for the electronic cigarette charging case according to claim 1, characterized in that, The boost control module also includes a pull-up resistor, the first end of which is connected to the control terminal of the first electronic switch, and the second end of which is connected to the second terminal of the first electronic switch.

6. The boost circuit for the electronic cigarette charging case according to claim 1, characterized in that, The switching assembly includes a second electronic switch and a second voltage divider resistor. The first end of the second electronic switch is connected to the control end of the first electronic switch. The control end of the second electronic switch is used to connect to an external power input. The second end of the second electronic switch is grounded. The first end of the second voltage divider resistor is connected to the control end of the second electronic switch. The second end of the second voltage divider resistor is grounded.

7. The boost circuit for an electronic cigarette charging case according to claim 6, characterized in that, The second electronic switch is an N-channel MOSFET.

8. The boost circuit for the electronic cigarette charging case according to claim 1, characterized in that, The filtering protection module includes a filtering capacitor and an anti-static component. The first end of the filtering capacitor and the first end of the anti-static component are connected to the charging terminal of the electronic cigarette. The second end of the filtering capacitor is grounded.

9. The boost circuit for an electronic cigarette charging case according to claim 8, characterized in that, The anti-static component includes at least one transient voltage suppression diode, one end of which is connected to the charging terminal of the electronic cigarette's motor, and the other end of which is grounded.

10. An electronic cigarette charging device, characterized in that, Includes the boost circuit for an electronic cigarette charging case as described in any one of claims 1 to 9.

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