CN210929648U - Electronic cigarette with automatic closed-loop control output power supply chip - Google Patents

Abstract

The utility model discloses an electronic cigarette with an automatic closed-loop control output power supply chip, which comprises an atomizer and a battery component which are connected with each other, wherein the atomizer comprises a heating element for heating and atomizing cigarette liquid, the battery component comprises a battery and a circuit control panel, a control circuit is arranged on the circuit control panel, the control circuit comprises a microcontroller, a power supply chip which is respectively and electrically connected with the microcontroller and can automatically control the output in a closed-loop manner, a microcontroller power supply unit and a starting switch, the control circuit is also provided with a reference resistor connected with the heating element, the power supply chip is electrically connected with the battery, the reference resistor and the heating element, the power supply chip carries out automatic closed-loop control through detecting the resistance value of the reference resistor and the feedback of output voltage under the command of the microcontroller so as to output adjustable accurate voltage to supply to the heating element, and can realize the high-, a constant power output is achieved so that the heating element produces a stable amount of smoke.

Description

Electronic cigarette with automatic closed-loop control output power supply chip

Technical Field

The utility model relates to an electron cigarette technical field, more specifically the utility model relates to an electron cigarette with automatic closed-loop control output power chip.

Background

The existing atomization electronic cigarette generally atomizes the cigarette liquid through the heating of the atomizer to generate smoke for smokers to use, and because the cigarette liquid of the electronic cigarette does not contain cigarette tar, the harm of the cigarette tar to the bodies of people is avoided, so that the electronic cigarette gradually replaces cigarettes to be widely used.

The power of the existing electronic cigarette is from an internal battery, when the electronic cigarette is just started to be used, the output voltage of the battery is too high, the smoke amount is too large during smoking, the electric quantity of the battery is gradually reduced from high to bottom along with the increase of the service time of the electronic cigarette, the output voltage of the battery is also continuously reduced, and the smoke amount is greatly reduced due to too low later-stage voltage. Meanwhile, the resistance value of the heating resistor of the electronic cigarette atomized liquid may change along with the change of the atomization temperature, so that the working power of the heating resistor also changes continuously, and the amount of the emitted smoke is also very unstable in different stages of battery power consumption and different heating temperatures when a user smokes. Therefore, a circuit capable of performing voltage step-up and step-down control is needed to achieve stable output of the power voltage, and meanwhile, the output voltage needs to be adjusted in real time according to the resistance value change of the heating resistor, so that the output power is stable to keep constant smoke amount.

The existing electronic cigarette generally adopts PWM pulse width modulation to output voltage to a heating element, the amplitude and the frequency of the output voltage are changed by adjusting a duty ratio, but when the battery voltage is lower than the required output voltage, the required output voltage cannot be achieved. The full-bridge boost-buck circuit applied to other fields has a complex structure and a large volume, is not beneficial to being installed and used in a tight space of an electronic cigarette, does not have a circuit for accurately controlling output voltage and outputting stable power, and has unstable performance and high manufacturing cost.

The existing electronic cigarette has no power chip which can manage and output the power supply, particularly has no power chip which can increase or decrease the voltage of the power supply, output stable and adjustable voltage and output constant power, and the existing electronic cigarette chip only has a current path for controlling a heating wire through a switching tube or only has constant-voltage output control but cannot adjust the voltage output to realize the constant power, so the actual requirements cannot be met.

Disclosure of Invention

An object of the utility model is to provide an electron cigarette with automatic closed-loop control output power supply chip for overcoming the not enough of above-mentioned technique, this electron cigarette with automatic closed-loop control output power supply chip realizes exporting accurate stable adjustable voltage and the stable power of output through automatic closed-loop control.

The technical scheme of the utility model is realized like this, an electron cigarette with automatic closed-loop control output power chip, including interconnect's atomizer and battery pack, the atomizer includes the heating element who is used for heating and atomizing cigarette liquid, battery pack includes battery and circuit control panel, be equipped with control circuit on the circuit control panel, control circuit includes microcontroller and the power chip, the microcontroller power supply unit and the starting switch that can automatic closed-loop control output that are connected with microcontroller electricity respectively, control circuit still is equipped with the reference resistance who is connected with heating element, power chip is connected with battery, reference resistance and heating element electricity, power chip carries out automatic closed-loop control through the feedback signal who detects heating element's resistance, output voltage under microcontroller's command for output adjustable accurate voltage supplies heating element, so that the heating element generates a stable amount of smoke.

Preferably, the power chip comprises a built-in MCU module, a full-bridge buck-boost module, an output voltage feedback circuit module, an internal power supply module, an operational amplifier unit module and a plurality of signal terminals, the full-bridge buck-boost module comprises four N-channel MOS transistors and four PWM driving logic circuits, the built-in MCU module is connected with and controls the four PWM driving logic circuits, the four PWM driving logic circuits are respectively connected with and control the four N-channel MOS transistors, wherein the first PWM driving logic circuit is further connected with a BOOT1 signal terminal and a SW1 signal terminal, the fourth PWM driving logic circuit is further connected with a BOOT2 signal terminal and a SW2 signal terminal, the first N-channel MOS transistor is electrically connected with the second N-channel MOS transistor, the fourth N-channel MOS transistor is electrically connected with the third N-channel MOS transistor, the first N-channel MOS transistor is further connected with an external input voltage terminal, i.e., the signal terminal, and the fourth N-channel MOS transistor is further connected with a VOUT signal terminal, the VOUT signal end is used for outputting voltage to a heating element of the electronic cigarette, the second PWM driving logic circuit, the second N-channel MOS tube, the third N-channel MOS tube and the third PWM driving logic circuit are respectively provided with a port to be connected with a PGND (pulse-generated noise network) grounding end, the output voltage feedback circuit module feeds the output voltage of the VOUT signal end back to the built-in MCU module, the internal power supply module boosts the input voltage of the VIN signal end and supplies power to the four PWM driving logic circuits, the operational amplifier unit module is used for detecting the resistance value of the heating element, differential analog signals are generated through operational amplification and are transmitted to the built-in MCU module, the built-in MCU module generates resistance value signals through operation and transmits the resistance value signals to the microcontroller, and the built-in MCU module performs high-precision operation according to setting signals of the microcontroller and feedback signals of the output voltage feedback circuit module and automatically controls the full-bridge voltage boost-boost module so as to output adjustable precise electric And (6) pressing.

Preferably, the power chip further includes a VDD power supply signal terminal, a GND ground signal terminal, a SDA data communication signal terminal, an SCL communication clock signal terminal, and an EN enable signal terminal connected to the built-in MCU module, the SDA data communication signal terminal is used for interactive data communication between the microcontroller and the built-in MCU module, a setting signal of the microcontroller includes a setting value signal of an output voltage, which is transmitted to the built-in MCU module through the SDA data communication signal terminal and the SCL communication clock signal terminal, the EN enable signal terminal is used for inputting an activation signal to activate the built-in MCU module, and the built-in MCU module is in a sleep state before being activated so that an output voltage value of the VOUT signal terminal is zero.

Preferably, the set value signal of the output voltage is generated by the microcontroller according to the resistance value signal.

Preferably, the built-in MCU module includes a PID controller, and the PID controller can perform proportional, integral and differential control on the full-bridge buck-boost module to output an adjustable accurate voltage.

Preferably, the MCU module includes an AD/a conversion unit, the AD/a conversion unit can convert an analog signal into a digital signal to realize high-precision control, and the number of the AD/a conversion unit is 12 or more.

Preferably, the power supply chip further comprises an IN + signal end and an IN-signal end which are connected with the operational amplifier unit module, the IN + signal end is used for being connected with a VOUT signal end, the IN-signal end is used for being connected with one end of the heating element, and a resistor is further connected between the IN + signal end and the IN-signal end IN series.

Preferably, an inductor is further connected in series between the SW1 signal terminal and the SW2 signal terminal, a first capacitor is connected in series between the SW1 signal terminal and the BOOT1 signal terminal, and a second capacitor is connected in series between the SW2 signal terminal and the BOOT2 signal terminal.

Preferably, the input voltage range of the VIN signal end is 2.5V to 12V, and the output voltage range of the VOUT signal end is 0V to 18V.

Preferably, the power chip further comprises an internal circuit protection module, wherein the internal circuit protection module is electrically connected with the built-in MCU module and is used for overvoltage, undervoltage, overcurrent and overtemperature protection of the internal circuit of the chip.

Preferably, the control circuit further comprises an energy calculating unit connected with the microcontroller, an energy and atomization amount converting unit and an airflow sensor for detecting airflow, wherein the energy calculating unit comprises a power calculating unit and a timer for operating and timing the airflow sensor, and the energy and atomization amount converting unit converts the energy calculated by the energy calculating unit into the amount of smoke or the amount of consumed smoke liquid.

Preferably, an alarm unit for prompting a user to pay attention is arranged in the control circuit, a limit value of the smoke amount or the smoke liquid consumption dose is preset in the microcontroller, and when the smoke amount or the smoke liquid consumption dose calculated by the energy and atomization amount conversion unit exceeds the limit value, the microcontroller controls the power supply chip to stop outputting the voltage or controls the alarm unit to send an alarm signal, or controls the power supply chip to stop outputting the voltage and simultaneously controls the alarm unit to send the alarm signal.

Preferably, the timer timing mode comprises timing of each suction port and accumulated timing of pumping for a certain time, the limit values comprise a limit value of each suction port and a limit value of pumping for a certain time, and when the smoke volume or the smoke liquid consumption dose calculated by the energy and atomization volume conversion unit exceeds the limit value of each suction port or the limit value of pumping for a certain time, the microcontroller controls the power supply chip to stop outputting the voltage or controls the alarm unit to send an alarm signal, or controls the power supply chip to stop outputting the voltage and simultaneously controls the alarm unit to send an alarm signal.

Preferably, the alarm unit comprises an acoustic alarm, an LED light alarm or a vibration alarm.

Preferably, the control circuit further comprises a battery detection unit, a battery charging unit and a battery protection unit, wherein the battery detection unit, the battery charging unit and the battery protection unit are electrically connected with the battery respectively.

Preferably, the control circuit further comprises a display unit arranged on the outer surface of the electronic cigarette, and the display unit is used for displaying relevant parameter information and alarm information of the electronic cigarette.

The utility model has the advantages that, this electronic cigarette with automatic closed-loop control output power chip, its power chip embeds built-in MCU module and output voltage feedback circuit module that have high accuracy AD, and built-in MCU module inside still is equipped with the PID controller, can carry out buck-boost regulation and realize the PID high accuracy automatic control of output voltage to full-bridge buck-boost module, it puts the unit to put to have high accuracy fortune simultaneously, can realize the accurate detection of heating element resistance, according to the resistance of heating element, built-in MCU module can realize the adjustable voltage output of different numerical values, in order to guarantee to realize invariable power output, thereby realize the stability of atomization volume in the electronic cigarette smoking process; the chip is internally provided with an internal circuit protection module, so that automatic overvoltage, undervoltage, overcurrent, short circuit, overtemperature and other protections can be realized; by arranging the EN start signal end, when the EN start signal end does not have an activation signal, the chip is in a dormant state so as to save energy and realize low power consumption; the chip also has an EMI automatic anti-interference adjusting function; in addition, the chip has high integration level, few external components, high working efficiency, small heat productivity and small volume, and is very easy to mount in the electronic cigarette with narrow volume space; furthermore, the utility model discloses an electronic cigarette, because its power chip can stable output stable voltage or constant power, the event can calculate the energy of generating heat according to the accumulative total time of smoking, and there is the one-to-one relation according to the dose that the energy of generating heat and the atomizing volume of electronic cigarette or tobacco juice consumed again, the event can calculate the atomizing volume or the tobacco juice dose of deriving in certain smoking time to carry out supervisory control to the atomizing volume or the dose of user's smoking.

Drawings

Fig. 1 is a cross-sectional view of an electronic cigarette according to an embodiment of the present invention;

fig. 2 is a structural diagram of a control circuit of an electronic cigarette according to an embodiment of the present invention;

fig. 3 is a diagram of an internal circuit structure of a power chip of an electronic cigarette according to an embodiment of the present invention;

fig. 4 is a circuit connection diagram of the power supply chip IN + and IN-signal terminals of the electronic cigarette according to the embodiment of the present invention;

fig. 5 is a circuit connection diagram of the power chip SW1 and the signal terminal SW2 of the electronic cigarette according to the embodiment of the present invention;

fig. 6 is a circuit connection diagram of the power chip SW1 and the BOOT1 signal terminal of the electronic cigarette according to the embodiment of the present invention;

fig. 7 is a circuit connection diagram of the power chip SW2 and the BOOT2 signal terminal of the electronic cigarette according to the embodiment of the present invention;

fig. 8 is a diagram of an internal circuit structure of a power chip of an electronic cigarette according to another embodiment of the present invention;

fig. 9 is a structural diagram of a control circuit of an electronic cigarette according to another embodiment of the present invention;

fig. 10 is a structural diagram of a control circuit of an electronic cigarette according to another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The electronic cigarette is not limited to be used for sucking electronic cigarette smoke liquid, but also can be used for sucking liquid substances with medicinal ingredients to generate aerosol of electronic cigarette smoke or liquid medicine.

Examples

As shown in fig. 1, the utility model discloses an electron cigarette with automatic closed-loop control output power chip, atomizer 1 including interconnect, battery pack 2, atomizer 1 is including the heating element 11 that is used for heating and atomizing tobacco juice, battery pack 2 includes battery 21, circuit control panel 22, be equipped with control circuit (not shown in the figure) on the circuit control panel 22, control circuit includes microcontroller 221, and the power chip 222 that can automatic closed-loop control output of being connected respectively with microcontroller 221, microcontroller power supply unit and starting switch (not shown in the figure), microcontroller power supply unit is used for carrying out the vary voltage power supply for microcontroller, starting switch includes automatic miaow head switch or manual key switch, the starting switch opens the back, the electron cigarette gets into the state of standby in order to prepare for the smoking.

As shown in fig. 2, the control circuit includes a microcontroller MCU, and a power chip for automatic closed-loop control output respectively electrically connected with the microcontroller MCU, the control circuit is further provided with a reference resistor connected with the heating element, the power chip is connected with a battery, the reference resistor and the heating element electrically, the power chip detects the resistance of the heating element by detecting the reference resistor under the command of the microcontroller MCU, and the feedback signal of the output voltage performs automatic closed-loop control to output an adjustable accurate voltage to supply to the heating element, so that the heating element generates a stable smoke amount.

As shown in fig. 3, the utility model discloses power chip with automatic closed-loop control output of electron cigarette, including built-in MCU module, full-bridge buck-boost module, output voltage feedback circuit module, inside power module, fortune put unit module and a plurality of signal end, the signal end is also exactly the pin of chip, and built-in MCU module is also exactly the microcontroller operation module of the inside setting of chip. The full-bridge buck-boost module comprises four N-channel MOS tubes (N MOS tube 1, N MOS tube 2, N MOS tube 3, N MOS tube 4) and four PWM driving logic circuits (PWM driving logic circuit 1, PWM driving logic circuit 2, PWM driving logic circuit 3, PWM driving logic circuit 4), the built-in MCU module is respectively connected with and controls the four PWM driving logic circuits through four circuits of DRIVER1, DRIVER2, DRIVER3 and DRIVER4, the four PWM driving logic circuits are respectively connected with and control the four N-channel MOS tubes, wherein the first PWM driving logic circuit (PWM driving logic circuit 1) is also connected with a BOOT1 signal end and a SW1 signal end, the fourth PWM driving logic circuit (PWM driving logic circuit 4) is also connected with a BOOT2 signal end and a SW2 signal end, the first N-channel MOS tube (N MOS tube 1) is electrically connected with the second N-channel MOS tube (N MOS tube 2), and the fourth N MOS tube (N MOS tube 4) is electrically connected with a third N-channel MOS tube (N MOS tube 3), the first N-channel MOS tube (N MOS tube 1) is also connected with an external input voltage end, namely a VIN signal end, the fourth N-channel MOS tube (N MOS tube 4) is also connected with an external output voltage end, namely a VOUT signal end, the VOUT signal end is used for outputting voltage to a heating element of the electronic cigarette, the heating element is a heating resistor with resistance value, a second PWM driving logic circuit (PWM driving logic circuit 2), a second N-channel MOS tube, a third N-channel MOS tube and a third PWM driving logic circuit (PWM driving logic circuit 3) are respectively provided with a port connected with a PGND grounding end, an output voltage feedback circuit module feeds the output voltage of the VOUT signal end back to the built-in MCU module, an internal power supply module supplies power to the four PWM driving logic circuits through AVCC signal ends after boosting the input voltage of the VIN signal end, and the operational amplifier unit module is used for detecting the resistance value of the heating element, the differential analog signal is generated through the operational amplifier and transmitted to the built-in MCU module, the built-in MCU module generates a resistance signal through operation and transmits the resistance signal to the microcontroller, the built-in MCU module carries out high-precision operation according to the setting signal of the microcontroller, the feedback signal of the output voltage feedback circuit module automatically controls the full-bridge voltage boosting and reducing module so as to output adjustable accurate and stable voltage through a VOUT signal end, and the output voltage can be automatically adjusted according to the setting signal of the microcontroller and can be adjusted to the linear voltage of different numerical values.

As shown in fig. 3, the utility model discloses power chip with automatic closed-loop control output of electron cigarette still includes VDD power supply signal end, GND ground signal end, SDA data communication signal end, SCL communication clock signal end and the EN that is connected with built-in MCU module and begins the ability signal end. The system comprises a VDD power supply signal end, an SDA data communication signal end, an EN start-energy signal end and a VOUT signal end, wherein the VDD power supply signal end is used for supplying power to a built-in MCU module, the SDA data communication signal end is used for data communication between the MCU and the built-in MCU module, the EN start-energy signal end is used for inputting an activation signal so as to activate the built-in MCU module, and the built-in MCU module is in. The set value signal of the output voltage is generated by the microcontroller according to the resistance value signal and the preset power value.

As shown in fig. 3, the MCU module includes a PID controller, and the PID controller can perform proportional, integral and differential control on the full-bridge buck-boost module to output a precise and stable voltage.

The built-in MCU module comprises an AD conversion unit, the AD conversion unit can convert an analog signal into a digital signal to realize high-precision control, and the number of the AD conversion unit is more than 12.

As shown IN fig. 3 and 4, the utility model discloses electron cigarette with automatic closed-loop control output power chip still includes IN + signal end and IN-signal end of being connected with the unit module is put to fortune, and IN + signal end is used for being connected with VOUT signal end, and IN-signal end is used for being connected with heating element Load one end, still concatenates a reference resistance R1 between IN + signal end and the IN-signal end. The operational amplifier unit module has a high-precision operational amplifier function, and can realize the accurate detection of the resistance value of the heating element.

As shown in fig. 5, fig. 6 and fig. 7, the power chip of the electronic cigarette of the present invention further has an inductor L1 connected in series between the SW1 signal terminal and the SW2 signal terminal, the inductor L1 is used for storing the released energy, and the circuit of the full-bridge buck-boost module is matched to boost and reduce the voltage. The first capacitor C1 is connected between the SW1 signal terminal and the BOOT1 signal terminal in series, the second capacitor C2 is connected between the SW2 signal terminal and the BOOT2 signal terminal in series, and the capacitors C1 and C2 are used for EMI electromagnetic filtering and preventing electromagnetic interference. Therefore, the chip can simply realize the EMI automatic anti-interference adjusting function.

As shown in fig. 2 and 3, the utility model discloses power chip with automatic closed-loop control output of electron cigarette, its main theory of operation is, does not need this chip during operation, and EN begins can the signal end not have the input activation signal, and built-in MCU module is out of work, and VOUT signal end does not have the output this moment, and this chip is in the dormancy state so that energy-conservation realizes the low-power consumption. When the chip needs to work, the microcontroller MCU inputs an activation signal through the EN start signal end, the built-in MCU module starts to work, the SDA signal end carries out bidirectional data signal transmission, the built-in MCU module receives a new set value of the microcontroller MCU to the output voltage, the PID controller carries out time sequence control on the four PWM driving logic circuits, the four PWM driving logic circuits respectively control the four N-channel MOS tubes, the input voltage of the VIN signal end is regulated into the output voltage, the output voltage feeds back the signal to the built-in MCU module through the output voltage feedback module, after the PID controller carries out regulation of proportional integral differential, the accurate and stable output voltage is output to the heating element of the electronic cigarette through the VOUT signal end, and the heating element of the electronic cigarette works under the stable and adjustable voltage.

The function of accurate, stable voltage of above-mentioned chip exports can be applied to the output constant voltage, also can be according to heating element's resistance change adjustment voltage output to guarantee heating element's constant power and use.

As shown IN fig. 3, the operational amplifier unit can detect the resistance R of the heating element of the electronic cigarette through the IN + signal terminal and the IN-signal terminal, process and convert the detected resistance R signal and transmit the signal to the MCU module, and then transmit the signal to the MCU. When the electronic cigarette heating element works, the cigarette liquid is atomized into smoke, energy conversion is needed, so the smoke quantity depends on the power of the electronic cigarette heating element, and the larger the power is, the larger the power isThe greater the amount of smoke and vice versa. When the heating element of the electronic cigarette works at high temperature, the resistance value R may change, because the power P of the heating element is equal to U²and/R, when the resistance value R changes, if the voltage U of the resistance value R keeps unchanged, the power of the resistance value R changes, the power of the resistance value R needs to be kept unchanged in order to ensure that the smoke quantity of the heating element of the electronic cigarette keeps stable, and the output voltage U needs to be regulated so as to keep the power unchanged. Under the principle, the microcontroller MCU calculates a new voltage set value U according to the resistance value R detected in real time, and inputs the new voltage set value U to the built-in MCU module through the SDA signal end, the built-in MCU module adjusts the full-bridge buck-boost module through the PID controller, a new output voltage U is output at the VOUT signal end, and the power P is maintained unchanged so as to maintain the stability of the smoke amount.

As shown in FIG. 3, the preferred input voltage range of VIN signal terminal of the electronic cigarette power supply chip of the present invention is 2.5V-12V, the preferred output voltage range of VOUT signal terminal is 0V-18V, and the preferred output current is 0A-8A.

As shown in fig. 8, in another embodiment of the present invention, the power chip further includes an internal circuit protection module, which is electrically connected to the MCU module, for protecting the internal circuit of the chip from overvoltage, undervoltage, overcurrent, short circuit, and over-temperature, thereby preventing the chip from being damaged.

The utility model discloses the inside components and parts volume of power chip of electron cigarette is very little, the integrated level is very high, makes outside components and parts also significantly reduce, and work efficiency can improve simultaneously, and calorific capacity is little, and the chip volume is very little, installs very easily inside the narrow and small electron cigarette in volume space.

As shown in fig. 9, the control circuit further includes an energy calculating unit connected to the microcontroller MCU, an energy and atomization amount converting unit, and an airflow sensor (not shown) for detecting airflow, when a user smokes, airflow is generated in the electronic cigarette, and the time when the airflow sensor detects the airflow is the time when the user smokes. The energy calculating unit comprises a power calculating unit and a timer for timing the operation of the airflow sensor, and the power calculating unit can calculate the output voltage value according to the voltage chipU and resistance R of the heating element to calculate power P of the heating element as U²The energy calculation unit can calculate the electric energy or the heating energy consumed by the heating element when the heating element generates heat according to the product of the power P and the smoking time, and the heating energy and the atomizing amount of the electronic cigarette or the dose consumed by the tobacco juice have a one-to-one correspondence relationship (in practice, the correspondence relationship can be calculated through modeling), so that the atomizing amount or the dose consumed by the tobacco juice within a certain smoking time can be calculated when the output power is constant, namely the energy and atomizing amount conversion unit can convert the energy calculated by the energy calculation unit into the dose consumed by the tobacco juice or the aerosol.

The energy calculation unit, the power calculation unit, the timer and the energy and atomization amount conversion unit can be arranged in the microcontroller.

As shown in fig. 3 and 9, an alarm unit for prompting a user to pay attention is arranged in the control circuit, a limit value of the amount of smoke or the amount of smoke consumed is preset in the microcontroller, and when the amount of smoke or the amount of smoke consumed calculated by the energy and atomization amount conversion unit exceeds the limit value, the microcontroller MCU controls the power chip to stop outputting voltage or controls the alarm unit to send an alarm signal, or controls the power chip to stop outputting voltage and simultaneously controls the alarm unit to send an alarm signal. The alarm unit comprises a sound alarm, an LED light alarm or a vibration alarm.

The microcontroller MCU controls the power supply chip to stop outputting the voltage and can control the power supply chip to stop outputting the voltage through the EN energy starting signal end of the power supply chip, and the microcontroller MCU cancels the output of an activation signal to the EN energy starting signal end of the power supply chip, so that the power supply chip can stop outputting the voltage of the VOUT signal end or control the alarm unit to send an alarm signal, or controls the power supply chip to stop outputting the voltage and simultaneously control the alarm unit to send the alarm signal.

The timing mode of the timer comprises timing of each suction port and accumulated timing of certain suction time, the limit values comprise a limit value of each suction port and a limit value of certain suction time, and when the smoke volume or the consumed dose of the smoke liquid calculated by the energy and atomization volume conversion unit exceeds the limit value of each suction port or the limit value of certain suction time, the microcontroller MCU controls the power chip to stop outputting the voltage.

As shown in fig. 10, the control circuit further includes a battery detection unit, a battery charging unit, and a battery protection unit, wherein the battery detection unit, the battery charging unit, and the battery protection unit are electrically connected to the battery, respectively. The control circuit further comprises a display unit arranged on the outer surface of the electronic cigarette, and the display unit is used for displaying relevant parameter information and alarm information of the electronic cigarette.

The above description is only for the preferred embodiment of the present invention, and the above specific embodiments are not intended to limit the present invention. Within the scope of the technical idea of the present invention, various modifications and alterations can be made, and any person skilled in the art can make modifications, amendments or equivalent replacements according to the above description, all belonging to the protection scope of the present invention.

Claims (16)

1. The utility model provides an electron cigarette with automatic closed-loop control output power chip, its characterized in that, atomizer and battery pack including interconnect, the atomizer is including the heating element who is used for heating and atomizing cigarette liquid, battery pack includes battery and circuit control board, be equipped with control circuit on the circuit control board, control circuit includes microcontroller and the power chip, microcontroller power supply unit and the starting switch that can automatic closed-loop control output that are connected with microcontroller difference electricity, control circuit still is equipped with the reference resistance who is connected with heating element, power chip is connected with battery, reference resistance and heating element electricity, power chip carries out automatic closed-loop control through the feedback signal who detects heating element's resistance, output voltage under microcontroller's command for output adjustable accurate voltage supplies with heating element, so that the heating element generates a stable amount of smoke.

2. The electronic cigarette with the automatic closed-loop control output power chip of claim 1, wherein the power chip comprises a built-in MCU module, a full-bridge buck-boost module, an output voltage feedback circuit module, an internal power supply module, an operational amplifier unit module and a plurality of signal terminals, the full-bridge buck-boost module comprises four N-channel MOS transistors and four PWM driving logic circuits, the built-in MCU module is connected with and controls the four PWM driving logic circuits, the four PWM driving logic circuits are respectively connected with and control the four N-channel MOS transistors, wherein the first PWM driving logic circuit is further connected with a BOOT1 signal terminal and a SW1 signal terminal, the fourth PWM driving logic circuit is further connected with a BOOT2 signal terminal and a SW2 signal terminal, the first N-channel MOS transistor is electrically connected with the second N-channel MOS transistor, the fourth N-channel MOS transistor is electrically connected with the third N-channel MOS transistor, the first N-channel MOS transistor is further connected with an external input voltage VIN signal terminal, the fourth N-channel MOS tube is further connected with a VOUT signal end, the VOUT signal end is used for outputting voltage to a heating element of the electronic cigarette, the second PWM driving logic circuit, the second N-channel MOS tube, the third N-channel MOS tube and the third PWM driving logic circuit are respectively provided with a port to be connected with a PGND grounding end, the output voltage of the VOUT signal end is fed back to the built-in MCU module by the output voltage feedback circuit module, the input voltage of the VIN signal end is boosted by the internal power supply module and then supplied to the four PWM driving logic circuits, the operational amplification unit module is used for detecting the resistance value of the heating element, a differential analog signal is generated by operational amplification and transmitted to the built-in MCU module, the built-in MCU module generates a resistance value signal by operation and transmits the resistance value signal to the microcontroller, and the built-in MCU module performs high-precision operation and automatically controls the full-bridge voltage boosting and boosting module according to the setting signal of the microcontroller and the feedback signal So as to output adjustable accurate voltage through the signal terminal of VOUT.

3. The electronic cigarette with the automatic closed-loop control output power chip as claimed in claim 2, wherein the power chip further comprises a VDD power supply signal terminal, a GND ground signal terminal, a SDA data communication signal terminal, an SCL communication clock signal terminal and an EN enable signal terminal connected to the built-in MCU module, the SDA data communication signal terminal is used for interactive data communication between the microcontroller and the built-in MCU module, the setting signal of the microcontroller comprises a setting value signal of the output voltage transmitted to the built-in MCU module through the SDA data communication signal terminal and the SCL communication clock signal terminal, the EN enable signal terminal is used for inputting an activation signal to activate the built-in MCU module, and the built-in MCU module is in a sleep state before being activated so that the output voltage value of the VOUT signal terminal is zero.

4. The electronic cigarette with the automatic closed-loop control output power supply chip of claim 3, wherein the set value signal of the output voltage is generated by a microcontroller through operation according to the resistance value signal.

5. The electronic cigarette with the automatic closed-loop control output power supply chip as claimed in claim 2, wherein the built-in MCU module comprises a PID controller, and the PID controller can realize proportional, integral and differential control of the full-bridge buck-boost module to output adjustable precise voltage.

6. The electronic cigarette with the automatic closed-loop control output power supply chip according to claim 2, wherein the built-in MCU module comprises an AD conversion unit, the AD conversion unit can convert an analog signal into a digital signal for realizing high-precision control, and the number of the AD conversion unit is more than 12.

7. The electronic cigarette with the automatic closed-loop control output power chip as claimed IN claim 2, wherein the power chip further comprises an IN + signal terminal and an IN-signal terminal connected with the operational amplifier unit module, the IN + signal terminal is used for being connected with a VOUT signal terminal, the IN-signal terminal is used for being connected with one end of the heating element, and a resistor is further connected IN series between the IN + signal terminal and the IN-signal terminal.

8. The electronic cigarette with an automatic closed-loop control output power chip as claimed in claim 2, wherein an inductor is further connected in series between the SW1 signal terminal and the SW2 signal terminal, a first capacitor is connected in series between the SW1 signal terminal and the BOOT1 signal terminal, and a second capacitor is connected in series between the SW2 signal terminal and the BOOT2 signal terminal.

9. The electronic cigarette with the automatic closed-loop control output power supply chip as claimed in claim 2, wherein the input voltage range of the VIN signal terminal is 2.5V-12V, and the output voltage range of the VOUT signal terminal is 0V-18V.

10. The electronic cigarette with the automatic closed-loop control output power chip of claim 2, wherein the power chip further comprises an internal circuit protection module, and the internal circuit protection module is electrically connected with the built-in MCU module and used for overvoltage, undervoltage, overcurrent and overtemperature protection of the internal circuit of the chip.

11. The electronic cigarette with the automatic closed-loop control output power supply chip according to any one of claims 1 to 10, wherein the control circuit further comprises an energy calculation unit connected with the microcontroller, an energy and atomization amount conversion unit, and an air flow sensor for detecting air flow, the energy calculation unit comprises a power calculation unit and a timer for timing the air flow sensor, and the energy and atomization amount conversion unit converts the energy calculated by the energy calculation unit into the amount of smoke or the amount of consumed smoke liquid.

12. The electronic cigarette with the automatic closed-loop control output power supply chip according to claim 11, wherein an alarm unit for prompting a user to pay attention is provided in the control circuit, a limit value of a smoke amount or a smoke liquid consumption dose is preset in the microcontroller, and when the smoke amount or the smoke liquid consumption dose calculated by the energy and atomization amount conversion unit exceeds the limit value, the microcontroller controls the power supply chip to stop outputting voltage or controls the alarm unit to send an alarm signal, or controls the power supply chip to stop outputting voltage and also controls the alarm unit to send an alarm signal.

13. The electronic cigarette with the automatic closed-loop control output power supply chip as claimed in claim 12, wherein the timer timing manner comprises timing of each puff and accumulated timing of a certain suction time, the limit values comprise a limit value of each puff and a limit value of a certain suction time, and when the amount of smoke or the amount of consumed smoke liquid calculated by the energy and atomization amount conversion unit exceeds the limit value of each puff or the limit value of the certain suction time, the microcontroller controls the power supply chip to stop outputting the voltage or controls the alarm unit to send an alarm signal, or controls the power supply chip to stop outputting the voltage and simultaneously controls the alarm unit to send an alarm signal.

14. The electronic cigarette with the automatic closed-loop control output power supply chip according to claim 12, wherein the alarm unit comprises an audible alarm, an LED light alarm or a vibration alarm.

15. The electronic cigarette with the automatic closed-loop control output power supply chip according to claim 1, wherein the control circuit further comprises a battery detection unit, a battery charging unit and a battery protection unit, and the battery detection unit, the battery charging unit and the battery protection unit are respectively electrically connected with the battery.

16. The electronic cigarette with the automatic closed-loop control output power supply chip according to claim 1, wherein the control circuit further comprises a display unit arranged on the outer surface of the electronic cigarette, and the display unit is used for displaying relevant parameter information and alarm information of the electronic cigarette.

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