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WO2014190513A1 - Circuit de charge et procédé pour empêcher une inversion d'alimentation électrique de charge - Google Patents

Circuit de charge et procédé pour empêcher une inversion d'alimentation électrique de charge Download PDF

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Publication number
WO2014190513A1
WO2014190513A1 PCT/CN2013/076435 CN2013076435W WO2014190513A1 WO 2014190513 A1 WO2014190513 A1 WO 2014190513A1 CN 2013076435 W CN2013076435 W CN 2013076435W WO 2014190513 A1 WO2014190513 A1 WO 2014190513A1
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WO
WIPO (PCT)
Prior art keywords
charging
resistor
unit
rechargeable battery
reverse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2013/076435
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English (en)
Chinese (zh)
Inventor
向智勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kimree Hi-Tech Inc
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Kimree Hi-Tech Inc
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Filing date
Publication date
Application filed by Kimree Hi-Tech Inc filed Critical Kimree Hi-Tech Inc
Priority to PCT/CN2013/076435 priority Critical patent/WO2014190513A1/fr
Publication of WO2014190513A1 publication Critical patent/WO2014190513A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/18—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to reversal of direct current
    • 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
    • H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits

Definitions

  • the present invention relates to the field of electronic cigarettes, and more particularly to a charging circuit and method for preventing reverse charging of a charging power source.
  • an electronic cigarette case that can be used for multiple charging and an electronic cigarette case that can charge the electronic cigarette stored therein no circuit for preventing the reverse connection of the charging power source is provided. If the circuit for preventing the reverse connection of the charging power source is not provided, there is a certain risk when the adapter is used to supply power to the electronic cigarette or the electronic cigarette case. Because there are no uniform standards for adapters on the market today, some adapter cores are positive and some are negative. If the head adapter is a negative adapter to charge the electronic cigarette or the electronic cigarette case, it is likely to damage the charging circuit, cause short circuit, battery damage, explosion or even fire.
  • the technical problem to be solved by the present invention is that the charging circuit of the above-mentioned electronic cigarette and the electronic cigarette case of the prior art has no defect of preventing the power reverse connection function, and provides a charging circuit and method capable of preventing the charging power source from being reversely connected.
  • a charging that prevents reverse charging of the charging power source The circuit is used for an electronic cigarette or an electronic cigarette case, comprising: a DC input end, an anti-reverse connection unit electrically connected to the DC input end, a charging management unit electrically connected to the anti-reverse connection unit, and charging management Unit electrically connected Rechargeable Battery;
  • the DC input terminal is configured to receive a DC input from a charging power source
  • the anti-reverse unit is configured to prevent the DC input terminal from providing reverse DC power to the rechargeable battery.
  • the anti-reverse unit When the DC power provided by the DC input terminal is reverse DC power, the anti-reverse unit is turned off, and the rechargeable battery is The power supply path is disconnected; when the DC power provided by the DC input terminal is forward direct current, the anti-reverse connection unit is turned on, and the DC input terminal is turned on.
  • the input direct current is input to the charging management unit through the anti-reverse connection unit;
  • the charging management unit is configured to perform voltage and current detection when the anti-reverse connection unit is turned on, and control whether the charging voltage of the rechargeable battery and the charging path are turned on or off according to the detection result.
  • the anti-reverse connection unit comprises: a first MOS transistor, wherein a positive pole and a source of the first MOS transistor are connected to the The charging management unit and the gate are connected to the negative pole of the DC input terminal and the negative pole of the rechargeable battery.
  • the charging management unit includes: a voltage stabilizing adjusting unit, a control unit, and a detecting unit, wherein the voltage stabilizing adjusting unit is respectively connected to the control unit, the anti-reverse unit, and the rechargeable battery, and the control unit is connected to the detecting unit, The detecting unit is connected to the rechargeable battery and the voltage regulating unit;
  • the detecting unit performs voltage and current detection when the anti-reverse unit is turned on; the control unit controls the voltage regulator adjusting unit to be turned on or off to turn on or off the rechargeable battery according to the detection result. a charging path, and controlling the voltage regulator adjusting unit to adjust a charging voltage of the rechargeable battery according to the detection result.
  • control unit includes a microcontroller
  • the microcontroller includes a V DD terminal, a V SS terminal, a pulse signal output terminal, a first input terminal, and a second input terminal;
  • the voltage regulator adjustment unit includes: a first transistor, a second transistor, a first resistor, a second resistor, a third resistor, a first inductor, a first capacitor, and a freewheeling diode;
  • the detecting unit includes: a fourth resistor, a fifth resistor, and a sixth resistor;
  • the V DD terminal of the microcontroller is connected to the emitter of the first MOS transistor; the VSS terminal of the microcontroller is grounded; the base of the first transistor is connected to the pulse signal output end of the microcontroller through the first resistor, and the emitter is grounded,
  • the collector is connected to the base of the first transistor through a third resistor and connected to the emitter of the second transistor through the third resistor and the second resistor connected in series, and the emitter of the first MOS transistor is connected to the cathode of the first MOS transistor
  • one end of the fourth resistor is connected to one end of the first inductor and The positive pole of the rechargeable battery and the other end are connected to the fifth resistor and the first input end of the microcontrol
  • the charging circuit for preventing the reverse connection of the charging power source further includes: a reverse connection reminding circuit electrically connected to the DC input end, configured to output prompt information when the DC input terminal inputs the reverse direct current power.
  • the reverse connection reminding circuit comprises a light emitting diode, a current limiting resistor and a first diode;
  • the cathode of the LED is connected to the anode of the DC input terminal, and the anode is connected to the cathode of the first diode through a current limiting resistor, and the anode of the first diode is connected.
  • the negative pole of the DC input is connected to the anode of the DC input terminal.
  • the reverse connection reminding circuit further comprises a buzzer
  • One end of the buzzer is connected to one end of the current limiting resistor and the cathode of the first diode, and the other end is connected to the positive electrode of the DC input terminal and the light emitting diode Cathode.
  • the anti-reverse connection unit comprises: a second MOS transistor, wherein the second MOS transistor is an N-type MOS transistor;
  • drain of the second MOS transistor is connected to the cathode of the DC input terminal
  • the source is connected to the cathode of the rechargeable battery
  • the gate is connected to the anode of the DC input terminal
  • the charging management unit includes: a voltage stabilizing adjusting unit, a control unit, and a detecting unit, wherein the voltage stabilizing adjusting unit is respectively connected to the control unit, the anti-reverse unit, and the rechargeable battery, and the control unit is connected to the detecting unit, The detecting unit is connected to the rechargeable battery and the voltage regulating unit;
  • the detecting unit performs voltage and current detection when the anti-reverse unit is turned on; the control unit controls the voltage regulator adjusting unit to be turned on or off to turn on or off the rechargeable battery according to the detection result. a charging path, and controlling the voltage regulator adjusting unit to adjust a charging voltage of the rechargeable battery according to the detection result.
  • control unit includes a microcontroller
  • the microcontroller includes a V DD terminal, a V SS terminal, a pulse signal output terminal, a first input terminal, and a second input terminal;
  • the voltage regulator adjustment unit includes: a first transistor, a second transistor, a first resistor, a second resistor, a third resistor, a first inductor, a first capacitor, and a freewheeling diode;
  • the detecting unit includes: a fourth resistor, a fifth resistor, and a sixth resistor;
  • the V DD terminal of the microcontroller is connected to the gate of the second MOS transistor and the emitter of the second transistor; the V SS terminal of the microcontroller is grounded; the base of the first transistor is connected to the microcontroller through the first resistor a pulse signal output end, an emitter ground, a collector connected to the base of the first triode through a third resistor and connected to the emitter of the second triode and the MOS transistor Q2 through the third resistor and the second resistor connected in series
  • the emitter of the second transistor is connected to the gate of the second MOS transistor, the collector is connected to the cathode of the diode and connected to the anode of the rechargeable battery through the first inductor; the anode of the freewheeling diode is grounded; the first capacitor
  • the positive pole is connected to one end of the first inductor and the positive pole and the negative pole of the rechargeable battery are grounded; one end of the fourth resistor is connected to one end of the first inductor and the positive pole of the rechargeable battery
  • the circuit for preventing reverse charging of the charging power source further comprises: a reverse connection reminding circuit, configured to input when the DC input terminal is input When the DC power is reversed, the prompt message is output.
  • a reverse connection reminding circuit configured to input when the DC input terminal is input When the DC power is reversed, the prompt message is output.
  • the reverse connection reminding circuit comprises a light emitting diode, a current limiting resistor and a first diode;
  • the cathode of the LED is connected to the anode of the DC input terminal, and the anode is connected to the cathode of the first diode through a current limiting resistor, and the anode of the first diode is connected.
  • the negative pole of the DC input is connected to the anode of the DC input terminal.
  • the reverse connection reminding circuit further comprises a buzzer
  • One end of the buzzer is connected to one end of the current limiting resistor and the cathode of the first diode, and the other end is connected to the positive electrode of the DC input terminal and the light emitting diode Cathode.
  • the method further includes:
  • the prompt information is output; the prompt information includes an audible prompt and/or a illuminating prompt.
  • the charging circuit and method for preventing reverse charging of the charging power source of the present invention have the following beneficial effects: effectively preventing the risk of the electronic cigarette or the electronic cigarette box from being reversely connected due to the charging power source, and having the advantages of low pressure drop and low power consumption.
  • FIG. 1 is a structural diagram of a charging circuit capable of preventing reverse charging of a charging power supply according to a first embodiment of the present invention
  • Figure 2 is a circuit diagram of a charging circuit capable of preventing reverse charging of a charging power supply according to a first embodiment of the present invention
  • FIG. 3 is a structural diagram of a charging circuit capable of preventing reverse charging of a charging power source according to a second embodiment of the present invention
  • FIG. 4 is a circuit diagram of a charging circuit capable of preventing reverse charging of a charging power supply according to a second embodiment of the present invention
  • Figure 5 is a circuit diagram of a charging circuit capable of preventing reverse charging of a charging power supply according to a third embodiment of the present invention.
  • FIG. 6 is a circuit diagram of a charging circuit capable of preventing reverse charging of a charging power supply according to a fourth embodiment of the present invention.
  • Fig. 7 is a flow chart showing a method of preventing reverse charging of a charging power source according to an embodiment of the present invention.
  • the charging circuit and method for preventing reverse charging of the charging power source can be used to prevent the charging power supply of the electronic cigarette or the electronic cigarette case from being reversely connected.
  • the MOS tube for anti-reverse connection by using the MOS tube for anti-reverse connection, the damage of the electronic cigarette or the electronic cigarette case due to the reverse connection of the charging power source can be effectively prevented, and the low pressure drop and low power consumption can be satisfied.
  • FIG. 1 shows a first embodiment of the present invention.
  • the charging circuit for preventing reverse charging of the charging power supply includes: a DC input terminal 101, and an anti-reverse connection unit 102 electrically connected to the DC input terminal 101.
  • a charging management unit 103 electrically connected to the anti-reverse unit 102, and a rechargeable battery 104 electrically connected to the charging management unit 103;
  • the DC input terminal 101 is configured to receive a DC input from a charging power source.
  • the charging power source can be a power adapter or the like.
  • the anti-reverse unit 102 is configured to prevent the DC input terminal 101 from providing reverse DC power to the rechargeable battery 104 when the DC input terminal When the DC power provided by the 101 is the reverse direct current, the anti-reverse unit 102 is turned off, and the power supply path of the rechargeable battery 104 is disconnected; when the direct current supplied from the DC input terminal 101 is the forward direct current, the anti-reverse connection unit 102 ON, DC input 101 The input DC power is input to the charge management unit 103 via the anti-reverse unit 102.
  • the charging management unit 103 is configured to be the anti-reverse unit 102 When turned on, voltage and current detection are performed, and based on the detection result, the charging path of the rechargeable battery 104 is controlled to be turned on or off.
  • the charging management unit 103 includes: a voltage regulation adjusting unit 201, a control unit 202, and a detecting unit 203.
  • the voltage regulation unit 201 is connected to the control unit 202, the anti-reverse unit 102, and the rechargeable battery 104, and the control unit 202 is connected to the detection unit 203.
  • the 203 is connected to the rechargeable battery 104 and the regulation regulator unit 201.
  • the anti-reverse unit 102 is turned on, the detecting unit 203 performs voltage and current detection; the control unit 202 According to the detection result, the regulation voltage regulation unit 201 is turned on or off to turn on or off the charging path of the rechargeable battery 104, and the voltage regulation adjusting unit 201 is controlled to charge the battery 104 according to the detection result.
  • the charging voltage is adjusted.
  • Fig. 2 is a circuit diagram showing a charging circuit for preventing reverse charging of a charging power supply according to a first embodiment of the present invention.
  • the charging circuit capable of preventing the charging power source from being reversely connected includes the DC input terminal 101, the anti-reverse connection unit 102, the charging management unit 103, and the charging battery 104.
  • the anti-reverse unit 102 includes: a MOS transistor Q1, and the M OS transistor Q1 is a P-type MOS transistor.
  • a MOS transistor of the type AO3401 can be selected as the Q1.
  • the control unit 202 in the charging management unit 103 includes a microcontroller U1 including a V DD terminal 1 , a V SS terminal 2 , a pulse signal output terminal 3 , a first input terminal 4 and a second input terminal 5 ;
  • the adjusting unit 201 includes: a triode PQ1, a triode PQ2, a resistor R1, a resistor R2, a resistor R3, an inductor L1, a capacitor C1, and a freewheeling diode D1.
  • the detecting unit 203 includes a resistor R4, a resistor R5, and a resistor R6.
  • the drain of the MOS transistor Q1 is connected to the anode of the DC input terminal 101, the source is connected to the charge management unit 103, the gate is connected to the cathode of the DC input terminal 101, and the cathode of the rechargeable battery 104.
  • the V DD terminal 1 of the microcontroller U1 is connected to the source of the MOS transistor Q1 and the emitter of the transistor PQ2; the V SS terminal 2 of the microcontroller is grounded; the base of the transistor PQ1 is connected to the pulse signal output of the microcontroller U1 through the resistor R1.
  • Terminal 3 emitter grounded, collector connected to the base of transistor PQ1 through resistor R3 and connected to the emitter of transistor PQ2 and the source of MOS transistor Q1 through series resistor R3 and resistor R2; the emitter of transistor PQ2 is connected to MOS transistor Q1
  • the source and the collector are connected to the cathode of the flow diode D1 and connected to the anode of the rechargeable battery 104 through the inductor L1; the anode of the freewheeling diode D1 is grounded; the anode of the capacitor C1 is connected to one end of the inductor L1 and the anode and cathode of the rechargeable battery 104 are grounded;
  • One end of the resistor R4 is connected to one end of the inductor L1 and the positive pole of the rechargeable battery 104, the other end is connected to the resistor R5 and the first input end of the microcontroller U1; one end of the resistor R5 is connected to the resistor R4 and the first input terminal 4 of the
  • the charging management unit 103 further includes: a light emitting diode D2, and a first output end of the microcontroller U1. Connect to the anode of LED D2 and the cathode of LED D2 to ground.
  • the DS of the MOS transistor Q1 The terminal drain and source need to be reversed to prevent reverse connection.
  • the DC input 101 is connected to an external charging source, for example, to an adapter.
  • MOS transistor Q1 When the external charging power source is normally connected, current flows from the drain of the MOS transistor Q1 through the parasitic diode to the source. Make MOS tube Q1 A voltage difference is generated between the gate and the source, and the MOS transistor Q1 is turned on to charge the rechargeable battery 104. Because, when MOS transistor Q1 is turned on, MOS transistor Q1 It is equivalent to a resistor with a small resistance value, and the power consumption on the loaded MOS transistor Q1 is small. Therefore, the power consumption of the charging circuit capable of preventing the charging power supply from being reversed in the embodiment of the present invention is small, and no serious heat generation phenomenon occurs.
  • MOS transistor Q1 When the external charging power supply is reversed, MOS transistor Q1 is not turned on, MOS transistor Q1 No current flows between the drain and the source, and the charging path of the rechargeable battery 104 is turned off.
  • the charge management circuit 103 perform voltage and current detection.
  • the microcontroller U1 in the charge management circuit 103 needs to be a microcontroller with AD conversion and pulse output, for example, the model STC15F2K16S2 can be selected. MCU or MCU model SN8P2711B. If the microcontroller of the model SN8P2711B is selected as the microcontroller U1, the microcontroller U1 in the first embodiment of the present invention
  • the first input 4 can be its 3rd pin
  • the second input 5 can be its 9th pin
  • the first output 6 can be its 5th pin
  • the pulse signal output 3 can be its 4th. Pin.
  • the single-chip microcomputer of the model SN8P2711B has two pulse output terminals and six input and/or output terminals
  • the first output terminal 6 the pulse signal output terminal 3 can also be other pins of the microcontroller model SN8P2711B.
  • the microcontroller U1 controls the pulse signal output terminal 3 to output a high level.
  • NPN type transistor PQ1 conduction, PNP type transistor PQ2 is turned on, and the DC power at the DC input terminal 101 charges the rechargeable battery 104.
  • the microcontroller U1 controls the pulse signal output terminal 3 to output a low level.
  • NPN type transistor PQ1 cut-off, PNP type transistor When PQ2 is turned off, the charging battery 104 is turned off to protect it.
  • the microcontroller U1 controls the first output terminal 6 to output a high level, so that the light emitting diode D2 Illuminate to remind the user.
  • the light emitting diode D2 can also be configured to emit light to inform the user when the rechargeable battery 104 is fully charged.
  • the microcontroller U1 passes the adjustment pulse signal output terminal 3 based on the detected actual charging voltage and charging current.
  • the duty ratio of the output pulse signal controls the conduction state of the transistor PQ2 to effect adjustment of the charging voltage so that the charging voltage of the rechargeable battery 104 is within a certain range.
  • the charging circuit capable of preventing the charging power supply from being reversely connected includes a DC input terminal 101, an anti-reverse connection unit 102 electrically connected to the DC input terminal 101, and an anti-reverse connection unit 102.
  • the reverse connection reminder circuit 10 5 is used to output a prompt message to remind the user when the DC input terminal 101 inputs the reverse direct current.
  • the prompt information output includes an audible prompt and/or a illuminating prompt.
  • FIG. 4 there is shown a circuit diagram of a charging circuit for preventing reverse charging of a charging power source according to a second embodiment of the present invention.
  • the components of the anti-reverse connection unit 102 and the charging management circuit 103 and the connection relationship are the same as those of the first embodiment, and will not be described here.
  • the reverse connection reminder circuit 105 includes a light emitting diode D 3 , a current limiting resistor R 7 , and a diode. D4, buzzer H1.
  • the cathode of the LED D 3 is connected to the anode of the DC input terminal 101, and the anode is passed through a current limiting resistor R 7 Connected to the cathode of diode D4, the anode of diode D4 is connected to the negative terminal of DC input terminal 101.
  • One end of the buzzer H1 is connected to one end of the current limiting resistor R 7 and the cathode of the diode D4. The other end is connected to the anode of the DC input terminal 101 and the cathode of the LED D3.
  • the diode D4 when the external charging power source is normally connected, the diode D4 is not turned on, the light emitting diode D3 and the buzzer H1 does not work.
  • diode D4 turns on, and LED D3 and buzzer H1 work to output a message.
  • the charging circuit for preventing the charging power supply from being reversely connected includes: a DC input terminal 101, an anti-reverse connection unit 102 electrically connected to the DC input terminal 101, and an anti-reverse connection unit 102 electrically connected.
  • the charging management unit 103 is a rechargeable battery 104 electrically connected to the charging management unit 103.
  • the anti-reverse unit 102 includes: a MOS transistor Q2.
  • MOS tube Q2 It is an N-type MOS transistor.
  • the N-type MOS transistor of model AO3402 can be selected as Q2.
  • the drain of the MOS transistor Q2 is connected to the cathode of the DC input terminal 101, and the source is connected to the rechargeable battery.
  • the negative electrode and the gate are connected to the positive electrode of the DC input terminal 101 and the charging management unit 103.
  • the control unit 202 in the charging management unit 103 includes a microcontroller U1, and the microcontroller U1 includes a V DD terminal 1 , a V SS terminal 2 , a pulse signal output terminal 3 , The first input terminal 4 and the second input terminal 5;
  • the voltage regulation unit 201 includes: a transistor PQ1, a transistor PQ2, a resistor R1, a resistor R2, a resistor R3, an inductor L1, a capacitor C1, and a freewheeling diode D1.
  • the detecting unit 203 includes: Resistor R4, resistor R5, and resistor R6.
  • the V DD terminal 1 of the microcontroller U1 is connected to the gate of the MOS transistor Q2 and the emitter of the transistor PQ2; the V SS terminal 2 of the microcontroller is grounded; the base of the transistor PQ1 is connected to the pulse of the microcontroller U1 through the resistor R1.
  • the signal output terminal 3 the emitter is grounded, and the collector is connected to the base of the transistor PQ1 through the resistor R3 and connected to the emitter of the transistor PQ2 and the gate of the MOS transistor Q2 through the series resistor R3 and the resistor R2; the emitter of the transistor PQ2 is connected to the MOS
  • the gate and collector of the tube Q2 are connected to the cathode of the diode D1 and connected to the anode of the rechargeable battery 104 through the inductor L1; the anode of the freewheeling diode D1 is grounded; the anode of the capacitor C1 is connected to one end of the inductor L1 and the anode and cathode of the rechargeable battery 104.
  • one end of the resistor R4 is connected to one end of the inductor L1 and the positive pole of the rechargeable battery 104, the other end is connected to the resistor R5 and the first input end 4 of the microcontroller U1; one end of the resistor R5 is connected to the resistor R4 and the first of the microcontroller U1 The input terminal 4 and the other end are grounded; one end of the resistor R6 is connected to the second input end 5 of the microcontroller U1 and the negative pole of the rechargeable battery 104, and the other end is grounded.
  • the charging management unit 103 further includes: a light emitting diode D2, and a first output end of the microcontroller U1. Connect to the anode of LED D2 and the cathode of LED D2 to ground.
  • the current flows from the MOS transistor Q2.
  • the drain flows through the parasitic diode to the source.
  • a voltage difference is generated between the gate and the source of the MOS transistor Q2, and the MOS transistor Q2 is turned on to charge the rechargeable battery 104.
  • MOS transistor Q2 is equivalent to a resistor with a small resistance value, and MOS transistor Q2 is loaded.
  • the power consumption is small. Therefore, compared with the prior art, the diode is used for anti-reverse connection, and the charging circuit capable of preventing the charging power supply from being reversely connected in the embodiment of the present invention has low power consumption and does not cause serious heat generation.
  • MOS transistor Q2 When the external charging power supply is reversed, MOS transistor Q2 is not turned on, MOS transistor Q2 No current flows between the drain and the source, and the charging path of the rechargeable battery 104 is turned off.
  • the charge management circuit 103 perform voltage and current detection.
  • the microcontroller U1 in the charge management circuit 103 needs to be a microcontroller with AD conversion and pulse output, for example, the model STC15F2K16S2 can be selected. MCU or MCU model SN8P2711B. If the microcontroller of the model SN8P2711B is selected as the microcontroller U1, the microcontroller U1 in the first embodiment of the present invention
  • the first input 4 can be its 3rd pin
  • the second input 5 can be its 9th pin
  • the first output 4 can be its 5th pin
  • the pulse signal output 3 can be its 4th. Pin.
  • the single-chip microcomputer of the model SN8P2711B has two pulse output terminals and six input and/or output terminals
  • the first output terminal 6 the pulse signal output terminal 3 can also be other pins of the microcontroller model SN8P2711B.
  • the microcontroller U1 controls the pulse signal output terminal 3 to output a high level.
  • NPN type transistor PQ1 conduction, PNP type transistor PQ2 is turned on, and the DC power at the DC input terminal 101 charges the rechargeable battery 104.
  • the microcontroller U1 controls the pulse signal output terminal 3 to output a low level. NPN type transistor PQ1 cut-off, PNP type transistor When PQ2 is turned off, the charging battery 104 is turned off to protect it. At this time, the microcontroller U1 controls the first output terminal 3 to output a high level, so that the light emitting diode D2 Illuminate to remind the user. In addition, the light emitting diode D2 can also be configured to emit light to inform the user when the rechargeable battery 104 is fully charged.
  • the microcontroller U1 passes the adjustment pulse signal output terminal 3 based on the detected actual charging voltage and charging current.
  • the duty ratio of the output pulse signal controls the conduction state of the transistor PQ2 to effect adjustment of the charging voltage so that the charging voltage of the rechargeable battery 104 is within a certain range. .
  • the charging circuit capable of preventing the charging power supply from being reversely connected includes a DC input terminal 101, an anti-reverse connection unit 102 electrically connected to the DC input terminal 101, and a charging management circuit electrically connected to the anti-reverse connection unit 102. 103.
  • a rechargeable battery 104 electrically connected to the charging management circuit 103, and a reverse connection reminding circuit 10 5 electrically connected to the DC input terminal 101.
  • Reverse reminder circuit 10 5 It is used to output a prompt message to remind the user when the DC input terminal 101 inputs reverse DC power.
  • the prompt information output includes an audible prompt and/or a illuminating prompt.
  • the anti-reverse unit 102 and the charge management circuit 103 The composition and the connection relationship are the same as those of the third embodiment, and will not be described here.
  • the reverse connection reminder circuit 105 includes a light emitting diode D 3 , a current limiting resistor R 7 , a diode D4 , Buzzer H1.
  • the cathode of the light-emitting diode D 3 is connected to the anode of the DC input terminal 101, and the anode is passed through a current limiting resistor R 7 to connect the diode D4.
  • the cathode of the diode D4 is connected to the negative pole of the DC input terminal 101.
  • One end of the buzzer H1 is connected to one end of the current limiting resistor R 7 and the cathode of the diode D4, and the other end is connected to the DC input terminal.
  • the anode of 101 and the cathode of LED D 3 is connected to the anode of the cathode of LED D 3 .
  • the diode D4 when the external charging power source is normally connected, the diode D4 is not turned on, the light emitting diode D3 and the buzzer H1 does not work.
  • diode D4 turns on, and LED D3 and buzzer H1 work to output a message.
  • the reverse connection reminding circuit 10 5 by adding the reverse connection reminding circuit 10 5 , it is possible to pass the light emitting diode when the external charging power source is reversed. D2 and speaker B 2 remind the user that the user can find the reverse connection of the charging power.
  • the reverse connection reminder circuit 10 5 may also include only the light emitting diode D 3 and the current limiting resistor. R 7 and diode D4.
  • the user is reminded by the light-emitting diode D 2 , which also enables the user to find the reverse connection of the charging power source in time.
  • FIG. 7 A flow chart of a method for preventing reverse charging of a charging power source according to an embodiment of the present invention is shown.
  • the method for preventing reverse charging of the charging power source according to the embodiment of the present invention is for preventing reverse charging of the charging power source of the electronic cigarette or the electronic cigarette case.
  • the electronic cigarette comprises a rechargeable battery
  • the electronic cigarette case comprises a rechargeable battery.
  • the method for preventing reverse charging of a charging power supply according to an embodiment of the invention includes the following steps:
  • step S4 if the detection result is: voltage and / Or if the current value exceeds a preset value, the charging path of the rechargeable battery is turned off to protect the charging circuit.
  • the method for preventing reverse charging of a charging power supply further includes: When the direct current is a reverse input, the prompt information is output; the prompt information includes an audible prompt and/or a illuminating prompt.
  • the charging circuit and method for preventing reverse charging of the charging power source can effectively prevent the risk of the electronic cigarette or the electronic cigarette box being reversed due to the charging power supply, and adopting the MOS tube to prevent the charging power source from being reversely connected, having a small voltage drop and low power consumption.
  • the microcontroller U1 is selected to have AD conversion and PWM The output of the microcontroller chip is fine.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention concerne un circuit de charge et un procédé pour empêcher une inversion d'une alimentation électrique de charge, utilisée pour une cigarette électronique ou pour une cartouche de cigarette électronique, le circuit de charge comprenant : une extrémité d'entrée de courant continu (101), une unité de prévention contre une inversion (102) connectée électriquement à l'extrémité d'entrée de courant continu (101), une unité de gestion de charge (103) connectée électriquement à l'unité de prévention contre une inversion (102), et une batterie rechargeable (104) connectée électriquement à l'unité de gestion de charge (103). La présente invention permet d'empêcher efficacement le risque provoqué par une inversion d'alimentation électrique de charge d'une cigarette électronique ou d'une cartouche de cigarette électronique, et présente les avantages d'une faible retombée et d'une faible consommation électrique.
PCT/CN2013/076435 2013-05-29 2013-05-29 Circuit de charge et procédé pour empêcher une inversion d'alimentation électrique de charge Ceased WO2014190513A1 (fr)

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