WO2015013913A1 - Circuit de protection contre les surintensités et les surtensions et procédé pour cigarette électronique - Google Patents

Circuit de protection contre les surintensités et les surtensions et procédé pour cigarette électronique Download PDF

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Publication number
WO2015013913A1
WO2015013913A1 PCT/CN2013/080505 CN2013080505W WO2015013913A1 WO 2015013913 A1 WO2015013913 A1 WO 2015013913A1 CN 2013080505 W CN2013080505 W CN 2013080505W WO 2015013913 A1 WO2015013913 A1 WO 2015013913A1
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WIPO (PCT)
Prior art keywords
charging
switch unit
mos transistor
discharge
overcurrent
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PCT/CN2013/080505
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English (en)
Chinese (zh)
Inventor
向智勇
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吉瑞高新科技股份有限公司
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Priority to PCT/CN2013/080505 priority Critical patent/WO2015013913A1/fr
Publication of WO2015013913A1 publication Critical patent/WO2015013913A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/90—Arrangements or methods specially adapted for charging batteries thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection

Definitions

  • the invention relates to the field of electronic cigarettes, and in particular to an overcurrent and overvoltage protection circuit and method for charging and discharging of an electronic cigarette.
  • rechargeable electronic cigarette battery rods such as some electronic cigarettes controlled by a microcontroller
  • a built-in charge management circuit on the market do not have overvoltage charging protection and overcurrent charging protection during charging.
  • These rechargeable electronic cigarette battery rod products rely entirely on the battery charge management chip in the external charger to prevent overvoltage and overcurrent during charging.
  • Defect 1 the size of the charging current set by the external charger is different. If the large current is used to charge the small capacity battery, the life and performance of the battery will be affected;
  • Defect 2 if the external charger fails, or loses the function of current limiting or voltage limiting, it will have a serious impact on the battery inside the battery rod, which will cause the battery to leak, ignite or even explode;
  • Defect 3 if the user uses the wrong charger and charges the battery rod with a charger without built-in charge management function, it may cause serious battery fire and explosion.
  • an electronic cigarette battery rod without a built-in charge management function has a great safety hazard in abnormal charging and needs improvement.
  • the technical problem to be solved by the present invention is that the above-mentioned battery rod without the built-in charging management circuit of the prior art has a large safety hazard in abnormal charging, and provides an overcurrent and overvoltage protection for the electronic cigarette. Circuits and methods.
  • the technical solution adopted by the present invention to solve the technical problem is: constructing an overcurrent and overvoltage protection circuit for an electronic cigarette, comprising a battery and at least one interface, further comprising a control unit and a charging detection switch unit;
  • the control unit is respectively connected to the battery, the interface and the charging detection switch unit;
  • the charging detection switch unit is connected to one end of the battery, and the interface is respectively connected to the charging detection switch unit and the battery;
  • the charging detection switch unit is configured to detect a first working voltage generated by an actual current flowing through an internal resistance of the charging detecting switch unit in real time, and output the first working voltage to the control unit;
  • the control unit is configured to calculate an actual charging current according to the first working voltage and determine whether the actual charging current exceeds a preset charging current threshold, and output a first charging control signal to the charging detection switch unit;
  • the control unit is further configured to detect an input voltage of the interface in real time and determine whether the input voltage is overvoltage, and output a second charging control signal to the charging detection switch unit; the first charging control signal or the second
  • the charge control signal is for controlling the charge detection switch unit to be turned off or to maintain the charge detection switch unit in an on state.
  • overcurrent and overvoltage protection circuit for an electronic cigarette further comprising a discharge detecting switch unit;
  • the discharge detecting switch unit is respectively connected to the charge detecting switch unit and the interface;
  • the discharge detecting switch unit is configured to detect a second working voltage generated by an actual current flowing through an internal resistance of the discharge detecting switch unit in real time, and output the second working voltage to the control unit;
  • the control unit is further configured to calculate an actual discharge current according to the second working voltage and determine whether the actual discharge current exceeds a preset discharge current threshold, and output a discharge control signal to the discharge detection switch unit;
  • the signal is used to control the discharge detecting switch unit to open or to maintain the discharge detecting switch unit in an on state.
  • control unit includes a microprocessor, and the model of the microprocessor is SN8P2711B.
  • the charge detecting switch unit includes a first MOS transistor
  • the interface includes a positive terminal and a negative terminal, and the positive terminal is connected to a positive electrode of the battery;
  • a drain of the first MOS transistor is respectively connected to a negative pole of the battery and a pin 7 of the microprocessor; a gate of the first MOS transistor is connected to a pin 8 of the microprocessor a source of the first MOS transistor is grounded, and a source of the first MOS transistor is further connected to the negative terminal
  • a voltage difference between a drain of the first MOS transistor and a source of the first MOS transistor is the first operating voltage
  • the pin 7 of the microprocessor receives the first working voltage, and the microprocessor calculates the actual charging current according to the first working voltage, if the actual charging current exceeds the Presetting the charging current threshold, the pin 8 of the microprocessor outputs the first charging control signal of the low level to the gate of the first MOS transistor, thereby controlling the first MOS transistor to be turned off.
  • the charge detecting switch unit further includes a first resistor connected to a gate of the first MOS transistor and the Between the positive poles of the battery;
  • the first resistor is configured to bias the first MOS transistor in a normal state.
  • the discharge detecting switch unit includes a second MOS transistor
  • a source of the second MOS transistor is grounded, a gate of the second MOS transistor is connected to a pin 5 of the microprocessor; and a drain of the second MOS transistor is respectively connected to the microprocessor Pin 9 and the negative terminal;
  • a voltage difference between a drain of the second MOS transistor and a source of the second MOS transistor is the second operating voltage
  • the microprocessor determines that the battery is in a charging state
  • the microprocessor determines that the battery is in a discharging state at this time, and calculates the actual discharging current according to the second working voltage, if The actual discharge current exceeds the preset discharge current threshold, and the fifth pin of the microprocessor outputs the second charge control signal of the low level to the gate of the second MOS tube, thereby controlling the The second MOS transistor is disconnected.
  • the discharge detecting switch unit further includes a second resistor connected to a gate of the second MOS transistor and the Between the sources of the second MOS tube;
  • the second resistor is for biasing the second MOS transistor under normal conditions.
  • the overcurrent and overvoltage protection circuit further includes a Schottky diode and a filter capacitor.
  • An anode of the Schottky diode is connected to the positive terminal, a cathode of the Schottky diode is connected to a pin 1 of the microprocessor, and one end of the filter capacitor is connected to the microprocessor Pin No. 1, the other end of the filter capacitor is grounded;
  • the input pin is sensed in real time by pin 1 of the microprocessor, which is used to provide a stable supply voltage to the microprocessor during normal operation.
  • the protection circuit further includes an alarm circuit
  • the alarm circuit is connected between the battery and the control unit, and the alarm circuit is configured to perform an alarm when the battery is in an overcurrent and overvoltage condition.
  • the alarm circuit includes a light emitting diode, and a cathode of the light emitting diode is connected to a pin 4 of the microprocessor, The anode of the light emitting diode is connected to the positive terminal of the battery.
  • the invention also provides an overcurrent and overvoltage protection method for an electronic cigarette, the method comprising the following steps:
  • the charging detection switch unit detects in real time the first working voltage generated by the actual current flowing through the internal resistance of the charging detection switch unit;
  • the control unit calculates an actual charging current according to the first working voltage, and determines whether the actual charging current exceeds a preset charging current threshold, and further outputs a first charging control signal to the charging detection switch unit. Meanwhile, the control The unit also detects the input voltage of the interface in real time and determines whether the input voltage is overvoltage, and then outputs a second charging control signal to the charging detection switch unit;
  • the first charging control signal or the second charging control signal controls the charging detecting switch unit to be turned off or the charging detecting switch unit to be kept in an on state.
  • the step S1 further includes:
  • the discharge detecting switch unit detects in real time a second working voltage generated by an actual current flowing through an internal resistance of the discharge detecting switch unit;
  • step S1 is followed by the following judging steps:
  • step S2 If the first working voltage is positive and the second working voltage is negative, the control unit determines that the battery is in the charging state, and continues to perform step S2; if the first working voltage is negative, the second working voltage is positive, and the control unit receives the second Working voltage, to determine that the battery is in a discharged state, go to step S2':
  • control unit calculates an actual discharge current according to the second operating voltage and determines whether the actual discharge current exceeds a preset discharge current threshold, thereby outputting a discharge control signal to the discharge detection switch unit;
  • the discharge control signal controls the discharge detecting switch unit to be turned off or the discharge detecting switch unit to be kept in an on state.
  • the overcurrent and overvoltage protection circuit and method for electronic cigarette according to the present invention have the following beneficial effects: the charging detection switch unit can detect the actual charging current in the charging state in real time and transmit it to the control unit, and can also be judged in the control unit. When the actual charging current is over-current, the connection between the battery and the external circuit is disconnected under the control of the control unit to realize over-current protection during charging, and the control unit can directly monitor the input voltage of the interface, and over-voltage at the input voltage. When the same control charge detection switch unit is turned off.
  • the present invention also includes a discharge detecting switch unit capable of protecting a discharge current from being excessive during discharge.
  • the protection circuit and method of the present invention eliminates the safety hazard of the battery rod without the built-in charge management circuit in abnormal charging.
  • the current sampling of the present invention does not require an additional sampling resistor, but directly utilizes the relatively small internal resistance of the MOS transistor to directly feed the voltage of the drain and source of the MOS transistor to the microprocessor in the control unit.
  • the microprocessor obtains the current flowing through the circuit according to the voltage drop and the conduction internal resistance of the MOS tube, and then controls whether to disconnect the battery and the charger or the atomizer according to the comparison result of the current and the corresponding preset threshold. Electrical connection.
  • the microprocessor can only detect the positive voltage drop on the charge detection switch unit during the charging process, and the microprocessor can only detect during the discharge process.
  • the discharge detects a positive voltage drop across the switching unit, thus enabling automatic determination of charge and discharge, making the overall circuit structure simpler.
  • FIG. 1 is a schematic structural view of an overcurrent and overvoltage protection circuit for an electronic cigarette according to the present invention
  • FIG. 2 is a circuit schematic diagram of a first embodiment of an overcurrent and overvoltage protection circuit for an electronic cigarette according to the present invention
  • FIG. 3 is a flow chart of the overcurrent and overvoltage protection method for the electronic cigarette of the present invention.
  • the present invention designs an overcurrent for the electronic cigarette for the battery rod without the built-in charging management circuit.
  • a voltage protection circuit which can prevent the charging voltage of the battery rod from being excessively large and the charging current from being excessive when the battery rod is in a charging state, and further, the protection circuit can prevent the battery rod when the battery rod is in a discharging state The discharge current is too large.
  • FIG. 1 is a schematic structural view of an overcurrent and overvoltage protection circuit for an electronic cigarette according to the present invention
  • the electronic cigarette includes a battery and at least one interface, the overcurrent and overvoltage protection circuit includes a control unit 200 and a charge detection switch unit 66;
  • the control unit 200 is respectively connected to the battery, the interface and the charge detecting switch unit 66; the charging detecting switch unit 66 is connected to one end of the battery, and the interface is respectively connected to the charging detecting switch unit 66 and The battery;
  • the battery is used for discharging when the interface is connected to the atomizer, providing a supply voltage of all components in the circuit and charging when the interface is connected to the charger. At this time, the external power supply supplies power to other components in the circuit. Voltage;
  • the charging detection switch unit 66 is configured to detect the first working voltage generated by the actual current flowing through the internal resistance of the charging detecting switch unit 66, and output the first working voltage to the control unit 200;
  • the control unit 200 is configured to calculate an actual charging current according to the first operating voltage and determine whether the actual charging current exceeds a preset charging current threshold, thereby outputting a first charging control signal to the charging detection switch unit 66;
  • the control unit 200 is further configured to detect an input voltage of the interface in real time and determine whether the input voltage is overvoltage, and thereby output a second charging control signal to the charging detection switch unit 66; the first charging control signal or Control of the second charge control signal
  • the charge detection switch unit 66 is turned off or the charge detection switch unit 66 is kept in an on state.
  • the protection circuit further includes a discharge detection switch unit 88;
  • the discharge detecting switch unit 88 is connected to the charging detecting switch unit 66 and the interface, respectively;
  • the discharge detecting switch unit 88 is configured to detect the second working voltage generated by the actual current flowing through the internal resistance of the discharging detecting switch unit 88, and output the second working voltage to the control unit 200;
  • the control unit 200 is further configured to calculate an actual discharge current according to the second operating voltage and determine whether the actual discharge current exceeds a preset discharge current threshold, and further output a discharge control signal to the discharge detecting switch unit 88;
  • the discharge control signal controls the discharge detecting switch unit 88 to open or maintain the discharge detecting switch unit 88 in an on state.
  • the protection circuit may further include an alarm circuit.
  • the alarm circuit is connected between the battery and the control unit 200 for alarming when the battery is in an overcurrent and overvoltage condition, and may include a flashing light. And whistle alarm.
  • FIG. 2 is a circuit schematic diagram of a first embodiment of an overcurrent and overvoltage protection circuit for an electronic cigarette according to the present invention.
  • the battery rod includes a battery and an interface, and the interface includes a positive terminal Vbat+ and a negative terminal Vbat-, a positive terminal Vbat+ and a negative terminal Vbat- are provided with a resistor R2, and a positive terminal Vbat+ is directly electrically connected to the positive pole of the battery, and the positive output of the battery The voltage is used as the supply voltage VDD of the entire circuit.
  • the above control unit 200 includes a microprocessor U1, and the model number of the microprocessor U1 is SN8P2711B.
  • the pin 10 of the microprocessor U1 serves as the ground reference signal of the whole circuit.
  • the pin 1 of the microprocessor U1 is connected to the cathode of the Schottky diode D2, and the pin 1 of the microprocessor U1 also passes through a filter capacitor. C1 is grounded, the anode of the Schottky diode D2 is connected to the positive pole of the battery, and the supply voltage VDD is received.
  • the pin 2 of the microprocessor U1 is connected to the smoking sensor, and the pin 3 of the microprocessor U1 is electrically connected to the micro Pin 9 of processor U1.
  • the input pin is detected in real time by pin 1 of the microprocessor U1, and the Schottky diode D2 is used to provide a stable supply voltage to the microprocessor U1 during normal operation.
  • the pin 7 of the U1 pin of the microprocessor U1 is used to detect the charging current
  • the pin 9 is used to detect the discharge current
  • the pin 8 is used to output the first charging control signal or the second charging control signal
  • 5 The pin is used to output the above discharge control signal.
  • the charge detecting switch unit 66 includes a first MOS transistor Q1, and the discharge detecting switch unit 88 includes a second MOS transistor Q2.
  • the first MOS transistor Q1 is of an N type
  • the model number is AO3400
  • the second MOS transistor Q2 is an N type.
  • the model number is AO3400.
  • the MOS transistor of the present invention is not limited to the N-type MOS transistor, and the P-type can also be used. When the P-type MOS transistor is used, the connection relationship can be changed according to the embodiment.
  • a drain of the first MOS transistor Q1 is respectively connected to a negative pole of the battery and a pin 7 of the microprocessor U1; a gate of the first MOS transistor Q1 is connected to the microprocessor U1 Pin 8, the gate of the first MOS transistor Q1 is also connected to the positive terminal of the battery through a resistor R4; the source of the first MOS transistor Q1 is connected to the source of the second MOS transistor Q2; the second MOS The source of the second MOS transistor Q2 is also electrically connected to the gate of the second MOS transistor Q2 via a resistor R3, and the gate of the second MOS transistor Q2 is connected to the a pin 5 of the microprocessor U1; a drain of the second MOS transistor Q2 is connected to a pin 9 of the microprocessor U1, and a drain of the second MOS transistor Q2 is also electrically connected to a negative Extreme Vbat-.
  • Resistors R4 and R3 are used to bias the first MOS transistor Q1 under normal conditions.
  • the normal state refers to the removal of the state of charge and discharge. Connecting the resistor R4 to the positive terminal of the battery can control the first MOS transistor Q1 to be in an on state.
  • the resistor R3 is connected to the ground signal to control the second MOS transistor Q2 to be in an off state.
  • the sampling of the voltage during the charging process is directly obtained through the AD pin of the microprocessor U1, that is, the above-mentioned pin No. 1.
  • the sampling of the current during charging or discharging is performed by taking advantage of the fact that the conduction internal resistance is constant and the resistance is small when the MOS tube is turned on, and the voltage drop on the MOS tube is directly sampled. It is worth noting that since the overcurrent determination criteria of charging and discharging are different, it is necessary to judge whether the battery is in a charging or discharging state, and the present invention passes the first MOS transistor Q1 that controls charging and the second MOS transistor Q2 that controls discharging.
  • the source is grounded, and the drain of the first MOS transistor Q1 is electrically connected to the microprocessor U1, and the voltage difference between the drain and the source of the first MOS transistor Q1 can be sampled, that is, the voltage drop of the internal resistance is turned on.
  • the voltage drop is positive during charging and negative during discharging.
  • the microprocessor U1 can only receive a positive voltage drop signal and cannot receive a negative voltage drop signal, so that it can be conveniently determined which state the battery is in, according to
  • the magnitude of the charging current flowing through the first MOS transistor Q1 can be calculated by sampling the voltage drop and the conduction internal resistance of the first MOS transistor Q1.
  • the voltage difference between the drain and the source of the second MOS transistor Q2 can be sampled, that is, within the conduction.
  • the voltage drop of the resistor the voltage drop is negative during charging, and is positive at the time of discharge. According to the sampled voltage drop and the conduction internal resistance of the second MOS transistor Q2, the discharge flowing through the second MOS transistor Q2 can be calculated. Current size.
  • a voltage difference between a drain of the first MOS transistor Q1 and a source of the first MOS transistor Q1 is the first operating voltage;
  • a drain of the second MOS transistor Q2 and the second MOS transistor The voltage difference between the sources of Q2 is the second operating voltage;
  • the pin 7 of the microprocessor U1 When charging, the first working voltage is positive, the pin 7 of the microprocessor U1 receives the first working voltage, the second working voltage is negative, and the number 9 of the microprocessor U1 The pin cannot receive the second operating voltage, the microprocessor U1 determines that the battery is in a charging state, and calculates the actual charging current according to the first operating voltage, if the actual charging current exceeds the Presetting the charging current threshold, the pin 8 of the microprocessor U1 outputs the first charging control signal of the low level to the gate of the first MOS transistor Q1, thereby controlling the first MOS transistor Q1 disconnect;
  • the pin 7 of the microprocessor U1 cannot receive the first working voltage
  • the second working voltage is positive
  • the microprocessor U1 is 9
  • the number pin receives the second operating voltage
  • the microprocessor U1 determines that the battery is in a discharged state, and calculates the actual discharging current according to the second operating voltage, if the actual discharging current exceeds the Presetting the discharge current threshold, the pin 5 of the microprocessor U1 outputs the second charging control signal of the low level to the gate of the second MOS transistor Q2, thereby controlling the second MOS transistor Q2 disconnect.
  • the charging current threshold of the present invention is determined to be 500 mA, and the discharging current during discharge is generally large, being 1 to 2 A, and the discharge current threshold is determined as 3 to 5A, preferred 3A in the present invention.
  • an alarm circuit is further included, specifically including a light-emitting diode D1.
  • the cathode of the light-emitting diode D1 is connected to the No. 4 pin of the microprocessor U1 through a resistor R1, and the anode of the LED D1 is connected. To the positive electrode of the battery.
  • the invention also discloses an overcurrent and overvoltage protection method for an electronic cigarette, as shown in FIG. 3, which is a flow chart of the overcurrent and overvoltage protection method for the electronic cigarette of the present invention.
  • the method includes the following steps:
  • the charging detection switch unit (66) detects in real time the first working voltage generated by the actual current flowing through the internal resistance of the charging detection switch unit (66);
  • the control unit (200) calculates an actual charging current according to the first working voltage and determines whether the actual charging current exceeds a preset charging current threshold, and further outputs a first charging control signal to the charging detection switch unit ( 66); at the same time, the control unit (200) also detects the input voltage of the interface in real time and determines whether the input voltage is overvoltage, and then outputs a second charging control signal to the charging detection switch unit (66);
  • the first charging control signal or the second charging control signal controls the charging detection switch unit (66) to open or keep the charging detection switch unit (66) in an on state.
  • the method is as follows:
  • the step S1 further includes:
  • the discharge detecting switch unit (88) detects in real time the second working voltage generated by the actual current flowing through the internal resistance of the discharge detecting switch unit (88);
  • step S1 is followed by the following judging steps:
  • step S2 If the first working voltage is positive and the second working voltage is negative, the control unit (200) determines that the battery is in the charging state, and continues to perform step S2; if the first working voltage is negative, the second working voltage is positive, the control unit (200) Receiving the second working voltage, determining that the battery is in a discharging state, and proceeding to step S2':
  • control unit (200) calculates an actual discharge current according to the second operating voltage and determines whether the actual discharge current exceeds a preset discharge current threshold, and further outputs a discharge control signal to the discharge detection switch unit (88). );
  • the discharge control signal controls the discharge detecting switch unit (88) to open or maintain the discharge detecting switch unit (88) in an on state.

Abstract

Circuit de protection contre les surintensités et les surtensions et procédé pour une cigarette électronique. Ledit circuit de protection contre les surintensités et les surtensions comprend une batterie, un port, une unité de commande (200) et une unité de commutation de détection de charge (66). L'unité de commande (200) est utilisée pour calculer un courant de charge réel selon une première tension de travail générée lorsqu'un courant réel traverse une résistance interne de l'unité de commutation de détection de charge (66) et détectée par l'unité de commutation de détection de charge (66), et l'unité de commande (200) est en outre utilisée pour détecter une tension d'entrée d'un port en temps réel, et si la tension d'entrée est la surtension ou que le courant de charge réel dépasse un seuil de courant de charge prédéfini, l'unité de commande (200) commande à l'unité de commutation de détection de charge (66) une instruction de déconnexion. Ledit circuit de protection contre les surintensités et les surtensions et ledit procédé permettent de protéger une cigarette électronique lors de la survenue d'une surintensité et d'une surtension pendant la charge, et élimine le risque de charge anormale d'un pôle de batterie n'ayant pas de circuit intégré de gestion de charge.
PCT/CN2013/080505 2013-07-31 2013-07-31 Circuit de protection contre les surintensités et les surtensions et procédé pour cigarette électronique WO2015013913A1 (fr)

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CN114376268A (zh) * 2021-12-30 2022-04-22 西安稳先半导体科技有限责任公司 一种烟杆及电子烟
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CN107124024B (zh) * 2017-06-21 2023-08-25 歌尔科技有限公司 一种虚拟现实设备的电池管理电路
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CN109619681A (zh) * 2018-11-14 2019-04-16 深圳市合元科技有限公司 一种电池健康监测方法、装置及电子烟
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CN109672255A (zh) * 2019-02-25 2019-04-23 威胜信息技术股份有限公司 后备电容充放电电路、充放电方法及其故障指示器
CN111938193A (zh) * 2019-05-15 2020-11-17 湖南中烟工业有限责任公司 烟具电路、烟具及其控制方法
CN110250573B (zh) * 2019-05-21 2024-02-23 杭州拓尔微电子有限公司 一种新型的电子烟控制系统
CN110250573A (zh) * 2019-05-21 2019-09-20 西安拓尔微电子有限责任公司 一种新型的电子烟控制系统
CN111452941A (zh) * 2020-05-14 2020-07-28 浙江九段智能科技有限公司 一种自主水下航行器的电源管理系统
CN111452941B (zh) * 2020-05-14 2024-05-17 浙江九段智能科技有限公司 一种自主水下航行器的电源管理系统
CN113303508A (zh) * 2021-05-19 2021-08-27 西安稳先半导体科技有限责任公司 一种烟杆、电子烟
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CN113303504B (zh) * 2021-05-19 2023-08-22 西安稳先半导体科技有限责任公司 一种烟杆、电子烟
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