WO2020215233A1 - Circuit de veille de chargeur embarqué - Google Patents

Circuit de veille de chargeur embarqué Download PDF

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Publication number
WO2020215233A1
WO2020215233A1 PCT/CN2019/084025 CN2019084025W WO2020215233A1 WO 2020215233 A1 WO2020215233 A1 WO 2020215233A1 CN 2019084025 W CN2019084025 W CN 2019084025W WO 2020215233 A1 WO2020215233 A1 WO 2020215233A1
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WIPO (PCT)
Prior art keywords
transistor
circuit
resistor
port
sleep
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PCT/CN2019/084025
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English (en)
Chinese (zh)
Inventor
胡定高
赵德琦
吴壬华
Original Assignee
深圳欣锐科技股份有限公司
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Application filed by 深圳欣锐科技股份有限公司 filed Critical 深圳欣锐科技股份有限公司
Priority to CN201980004978.6A priority Critical patent/CN111315612B/zh
Priority to PCT/CN2019/084025 priority patent/WO2020215233A1/fr
Publication of WO2020215233A1 publication Critical patent/WO2020215233A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Definitions

  • This application relates to the technical field of on-board chargers, and in particular to a sleep circuit for on-board chargers.
  • the embodiment of the present application provides a sleep circuit for a vehicle charger, which integrates the vehicle control device in the vehicle charger input control and guidance circuit into the vehicle charger, which reduces the overall cost and has strong reliability.
  • the embodiments of the present application provide a car charger sleep circuit, which is applied to a car charger control system, and includes a first filter circuit, a second filter circuit, a signal input circuit, a resistance detection circuit, and an intermediate circuit, wherein:
  • the first filter circuit is connected to the intermediate circuit, the intermediate circuit is connected to the second filter circuit, and the intermediate circuit includes a first conductive branch, a second conductive branch, a third conductive branch, and a second conductive branch.
  • the first port is connected to the positive pole of the vehicle low-voltage battery through a first fuse and a reversed first diode.
  • the two ports are grounded, the third port is connected to the internal control circuit of the charger, one end of the signal input circuit is connected to the intermediate circuit through the signal access port, the other end of the signal input circuit is grounded, and the resistance detection One end of the circuit is connected to the signal input circuit through the signal access port, and the other end of the resistance detection circuit is connected to the first port;
  • the first filter circuit and the second filter circuit are used to filter and stabilize the voltage
  • the signal input circuit is used to introduce a CC signal
  • the CC signal is a charging connection confirmation signal
  • the resistance detection circuit is used to detect the The resistance of CC signal to vehicle body ground;
  • the intermediate circuit is used to control the connection and disconnection of the on-board low-voltage battery and the on-board charger control system.
  • the intermediate circuit When the intermediate circuit is in a conducting state, the on-board low-voltage battery and the on-board charger control system In a conductive connection, the on-board low-voltage battery supplies power to the on-board charger control system; when the intermediate circuit is in a disconnected state, the on-board low-voltage battery is disconnected from the on-board charger control system, and the on-board The low-voltage battery stops supplying power to the on-board charger control system.
  • the first filter circuit includes a first capacitor and a second capacitor.
  • the first capacitor and the second capacitor are connected in parallel and connected to the third port and ground at both ends of the parallel connection.
  • the third port is connected to the drain of the first MOS transistor;
  • the second filter circuit includes a fourth capacitor, a fifth capacitor, and a first transient suppression diode, the fourth capacitor, the fifth capacitor, and the The first transient suppression diode is connected in parallel and the two ends of the parallel connection are respectively connected to the first port and the ground.
  • the first conductive branch includes the first MOS tube, a fourth MOS tube, a first resistor, a second resistor, a second Zener diode, and a fourth Zener diode.
  • the two ends of the resistor are respectively connected to the gate of the first MOS tube and the source of the first MOS tube, the source of the first MOS tube is connected to the first port, and the fourth regulator A diode is connected in parallel with the first resistor, both ends of the second resistor are respectively connected to the gate of the first MOS tube and the drain of the fourth MOS tube, and the cathode of the second Zener diode is connected to The gate of the fourth MOS tube is connected, and the anode of the second Zener diode is grounded.
  • the second conductive branch includes a third MOS tube, a first Zener diode, a fourth resistor, and a fifth resistor, and both ends of the fifth resistor are connected to the first port and the The drain of the third MOS transistor, the source of the third MOS transistor is grounded, the cathode of the first Zener diode is connected to the gate of the third MOS transistor, and the anode of the first Zener diode is It is connected to the signal access port, and both ends of the fourth resistor are respectively connected to the gate and ground of the third MOS transistor.
  • the third conductive branch includes a second MOS tube, a sixth resistor, and a fifth Zener diode, and two ends of the sixth resistor are respectively connected to the first port and the second MOS
  • the cathode of the fifth Zener diode is connected to the drain of the second MOS transistor, the anode of the fifth Zener diode is grounded, and the gate of the second MOS transistor is connected to the The gates of the three MOS transistors are connected, and the source of the second MOS transistor is grounded.
  • the fourth conductive branch includes a fifth MOS transistor, a first transistor, a seventh resistor, an eighth resistor, a NetB point and a sleep control circuit, and both ends of the eighth resistor are connected to the The emitter of the first transistor and the base of the first transistor, the emitter of the first transistor is connected to the first port, and the collector of the first transistor is connected to the NetB point.
  • the two ends of the seven resistors are respectively connected to the base of the first transistor and the drain of the fifth MOS transistor.
  • the gate of the fifth MOS transistor is connected to the drain of the second MOS transistor.
  • the source of the five MOS transistor is grounded, one end of the sleep control circuit is connected to the NetB point, and the other end of the sleep control circuit is grounded.
  • the signal input circuit includes a third resistor, a third Zener diode, a third capacitor, and a CC signal interface, and both ends of the third resistor are connected to the CC signal interface and the signal interface respectively.
  • the cathode of the third Zener diode is connected to the signal access port, the anode of the third Zener diode is grounded, and the third capacitor is connected in parallel with the third Zener diode.
  • the sleep control circuit includes a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a second transistor, and a Three transistors, fourth transistors, sixth capacitors, seventh capacitors, eighth capacitors and sleep signal interfaces, among which:
  • Both ends of the ninth resistor are respectively connected to the NetB point and the base of the second transistor, and both ends of the tenth resistor are respectively connected to the NetB point and the emitter of the second transistor.
  • the two ends of the eleventh resistor are respectively connected to the base of the second transistor and the emitter of the second transistor.
  • the base of the second transistor is connected to the collector of the third transistor.
  • the collector of the transistor is connected to the base of the third transistor, the base of the third transistor is connected to the sleep signal interface through the twelfth resistor, the seventh capacitor and the fourteenth resistor
  • the two ends of the parallel connection are respectively connected to the base and ground of the third transistor, the emitter of the third transistor is connected to the base of the fourth transistor, and the sixth capacitor is connected to the thirteenth transistor.
  • the two ends of the resistors connected in parallel and connected in parallel are respectively connected to the base and ground of the fourth transistor, the collector of the fourth transistor is connected to the drain of the third MOS transistor, and the emitter of the fourth transistor is grounded ,
  • the eighth capacitor and the fifteenth resistor are connected in parallel and connected to the sleep signal interface and the ground at both ends of the parallel connection.
  • the first MOS tube is an N-channel MOS tube
  • the second MOS tube, the third MOS tube, the fourth MOS tube, and the fifth MOS tube are P-channel tubes.
  • MOS tube, the first transistor and the second transistor are PNP transistors
  • the third transistor and the fourth transistor are NPN transistors.
  • an embodiment of the present application provides a switching power supply, including the sleep circuit of the vehicle charger disclosed in the first aspect of the embodiment of the present application.
  • the car charger sleep circuit is applied to the car charger control system, and includes a first filter circuit, a second filter circuit, a signal input circuit, a resistance detection circuit, and an intermediate circuit, wherein the first filter circuit Is connected to the intermediate circuit, the intermediate circuit is connected to the second filter circuit, and the intermediate circuit includes a first conductive branch, a second conductive branch, a third conductive branch, a fourth conductive branch, and a first conductive branch.
  • the third port is connected to the internal control circuit of the charger, one end of the signal input circuit is connected to the intermediate circuit through the signal access port, the other end of the signal input circuit is grounded, and one end of the resistance detection circuit passes through the
  • the signal access port is connected to the signal input circuit, and the other end of the resistance detection circuit is connected to the first port; the first filter circuit and the second filter circuit are used for filtering and stabilizing, and the signal input
  • the circuit is used to introduce a CC signal, the CC signal is a charging connection confirmation signal, the resistance detection circuit is used to detect the resistance of the CC signal to the vehicle body ground; the intermediate circuit is used to control the vehicle low-voltage battery and the The on-board charger control system is connected and disconnected.
  • the intermediate circuit When the intermediate circuit is in a conducting state, the on-board low-voltage battery is in conduction connection with the on-board charger control system, and the on-board low-voltage battery is connected to the on-board charger.
  • the control system supplies power; when the intermediate circuit is in a disconnected state, the vehicle-mounted low-voltage battery is disconnected from the vehicle-mounted charger control system, and the vehicle-mounted low-voltage battery stops supplying power to the vehicle-mounted charger control system.
  • FIG. 1 is a schematic structural diagram of a sleep circuit of a vehicle charger provided by an embodiment of the present application
  • FIG. 2A is a schematic diagram of the conduction of various components of the sleep circuit of the on-board charger shown in FIG. 1 when the charging gun is not inserted;
  • FIG. 2B is a diagram showing the conduction of various components when the charging gun is inserted in the sleep circuit of the on-board charger shown in FIG. 1;
  • Figure 2C is a diagram showing the conduction of the various components of the on-board charger control system in a low-power sleep state when the on-board charger control system is in a low-power sleep state after charging is completed and the charging gun is not pulled out.
  • the commercial power is transmitted to the main transformer of the vehicle charger through the charging pile, rectification and filtering circuits, and then transmitted to the power battery pack through the rectification and filtering circuits, and then transmitted to the vehicle low-voltage through the DC/DC conversion circuit and rectification and filtering circuits.
  • the battery, the vehicle control device controls the on-board low-voltage battery to supply power to the on-board charger control system.
  • more and more OEMs require that the vehicle control device in the vehicle charger input control and guidance circuit be integrated into the vehicle charger. At present, the industry generally adopts The single-chip microcomputer realizes this requirement.
  • the charger sleep circuit includes a first filter circuit, a second filter circuit, a signal input circuit, a resistance detection circuit and an intermediate circuit, among which:
  • the first filter circuit is connected to the intermediate circuit, and the intermediate circuit is connected to the second filter circuit.
  • the intermediate circuit includes a first conductive branch, a second conductive branch, a third conductive branch, a fourth conductive branch, a first port, and a second conductive branch.
  • the second port, the third port and the signal access port, the first port is connected to the positive pole of the vehicle low-voltage battery through the first fuse and the reversed first diode, the second port is grounded, and the third port is connected to the internal control circuit of the charger.
  • One end of the signal input circuit is connected to the intermediate circuit through the signal access port, the other end of the signal input circuit is grounded, one end of the resistance detection circuit is connected to the signal input circuit through the signal access port, and the other end of the resistance detection circuit is connected to the first port;
  • the first filter circuit and the second filter circuit are used for filtering and stabilizing, the signal input circuit is used to introduce the CC signal, the CC signal is the charging connection confirmation signal, and the resistance detection circuit is used to detect the resistance of the CC signal to the vehicle body ground;
  • the intermediate circuit is used to control the connection and disconnection of the on-board low-voltage battery and the on-board charger control system.
  • the intermediate circuit When the intermediate circuit is in the conducting state, the on-board low-voltage battery is connected to the on-board charger control system, and the on-board low-voltage battery is controlled by the on-board charger.
  • System power supply when the intermediate circuit is in a disconnected state, the on-board low-voltage battery is disconnected from the on-board charger control system, and the on-board low-voltage battery stops supplying power to the on-board charger control system.
  • the embodiment of the application achieves this requirement through a logic circuit, which not only reduces the overall cost, but also Strong reliability.
  • FIG. 1 is a schematic structural diagram of a vehicle charger sleep circuit 100 provided by an embodiment of the present application, which is applied to a vehicle charger control system and includes a first filter circuit 110, a second filter circuit 120, and a signal input circuit 130.
  • Resistance detection circuit 140 and intermediate circuit 150 where:
  • the first filter circuit 110 is connected to the intermediate circuit 150, and the intermediate circuit 150 is connected to the second filter circuit 120.
  • the intermediate circuit 150 includes a first conductive branch 151, a second conductive branch 152, The third conductive branch 153, the fourth conductive branch 154, the first port DYD, the second port GND, the third port LVS and the signal access port CC1, the first port DYD is connected to the reverse connection through the first fuse F1
  • the first diode D1 is connected to the positive pole of the vehicle low-voltage battery, the second port GND is grounded, the third port LVS is connected to the internal control circuit of the charger, and one end of the signal input circuit 130 is connected to the signal access port CC1 and
  • the intermediate circuit 150 is connected, the other end of the signal input circuit 130 is grounded, one end of the resistance detection circuit 140 is connected to the signal input circuit 130 through the signal access port CC1, and the resistance detection circuit 140 The other end is connected to the first port DYD.
  • the first filter circuit 110 and the second filter circuit 120 are used for filtering and stabilizing, the signal input circuit 130 is used for introducing a CC signal, the CC signal is a charging connection confirmation signal, and the resistance detection circuit 140 is used for To detect the resistance of the CC signal to the vehicle body ground, the intermediate circuit 150 is used to control the connection and disconnection of the on-board low-voltage battery and the on-board charger control system.
  • the on-board low-voltage battery is connected to the on-board charger control system, and the on-board low-voltage battery supplies power to the on-board charger control system; when the intermediate circuit 150 is in a disconnected state, the on-board low-voltage battery Disconnected from the vehicle-mounted charger control system, and the vehicle-mounted low-voltage battery stops supplying power to the vehicle-mounted charger control system.
  • the positive pole of the vehicle low-voltage battery is 12V
  • the first fuse F1 is used to limit the current peak, protect the safe operation of the circuit, and prevent the internal short circuit from affecting the external power supply.
  • the first diode D1 is used In the current limiting direction, the positive pole of the vehicle low-voltage battery is prevented from being connected to the GND reversely.
  • the first filter circuit 110 includes a first capacitor C1 and a second capacitor C2.
  • the first capacitor C1 and the second capacitor C2 are connected in parallel, and the two ends of the parallel connection are respectively connected to the first capacitor C1 and the second capacitor C2.
  • the third port LVS is connected to the drain of the first MOS transistor.
  • the second filter circuit 120 includes a fourth capacitor C4, a fifth capacitor C5 and a first transient suppression diode TVS.
  • the fourth capacitor C4, the fifth capacitor C5, and the first transient suppression diode TVS are connected in parallel and connected in parallel to the first port DYD and the second port GND, respectively.
  • the first transient suppression diode TVS is used for stabilizing voltage and preventing instantaneous spike voltage at the input terminal.
  • the first conductive branch 151 includes a first MOS transistor Q1, a fourth MOS transistor Q4, a first resistor R1, a second resistor R2, a second Zener diode ZD2, and a fourth Zener diode ZD4, both ends of the first resistor R1 are respectively connected to the gate of the first MOS transistor Q1 and the source of the first MOS transistor Q1, and the source of the first MOS transistor Q1 is connected to the first MOS transistor Q1.
  • One port DYD is connected, the fourth zener diode ZD4 is connected in parallel with the first resistor R1, and both ends of the second resistor R2 are respectively connected to the gate of the first MOS transistor Q1 and the fourth MOS transistor
  • the drain of the second zener diode ZD2 is connected to the gate of the fourth MOS transistor Q4, and the anode of the second zener diode ZD2 is grounded.
  • the second conductive branch 152 includes a third MOS transistor Q3, a first Zener diode ZD1, a fourth resistor R4, and a fifth resistor R5, and two ends of the fifth resistor R5 are respectively connected
  • the first port DYD and the drain of the third MOS transistor Q3, the source of the third MOS transistor Q3 are grounded, the cathode of the first Zener diode ZD1 and the gate of the third MOS transistor Q3
  • the anode of the first Zener diode ZD1 is connected to the signal access port CC1, and both ends of the fourth resistor R4 are respectively connected to the gate of the third MOS transistor Q3 and the second port GND.
  • the third conductive branch 153 includes a second MOS transistor Q2, a sixth resistor R6, and a fifth Zener diode ZD5, and two ends of the sixth resistor R6 are respectively connected to the first port DYD and the drain of the second MOS transistor Q2, the cathode of the fifth Zener diode ZD5 is connected to the drain of the second MOS transistor Q2, and the anode of the fifth Zener diode ZD5 is connected to the first Two port GND, the gate of the second MOS transistor Q2 is connected to the gate of the third MOS transistor Q3, and the source of the second MOS transistor Q2 is connected to the second port GND.
  • the fourth conductive branch 154 includes a fifth MOS transistor Q5, a first transistor T1, a seventh resistor R7, an eighth resistor R8, a NetB point, and a sleep control circuit 155.
  • the eighth resistor Both ends of R8 are respectively connected to the emitter of the first transistor T1 and the base of the first transistor T1.
  • the emitter of the first transistor T1 is also connected to the first port DYD.
  • the first transistor The collector of T1 is connected to the NetB point, the two ends of the seventh resistor R7 are respectively connected to the base of the first transistor T1 and the drain of the fifth MOS transistor Q5, and the fifth MOS transistor Q5
  • the gate is connected to the drain of the second MOS transistor Q2, the source of the fifth MOS transistor Q5 is grounded, the sleep control circuit 155 is connected to the NetB point, and the other end of the sleep control circuit 155 Ground.
  • the signal input circuit 130 includes a third resistor R3, a third Zener diode ZD3, a third capacitor C3, and a CC signal interface, and both ends of the third resistor R3 are respectively connected to the CC signal Interface and the signal access port CC1, the cathode of the third Zener diode ZD3 is connected to the signal access port CC1, the anode of the third Zener diode ZD3 is grounded, and the third capacitor C3 is connected to the The third Zener diode ZD3 is connected in parallel.
  • the breakdown voltage of the first Zener diode ZD1 is 3.3V, which is used to limit the lowest value of the gate voltage required for the third MOS transistor Q3 to turn on.
  • the second to fifth The breakdown voltage of the Zener diode (ZD2 ⁇ ZD5) is 15V, which is used for clamping and preventing overvoltage.
  • the sleep control circuit 155 includes a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, and a tenth resistor R11.
  • Both ends of the ninth resistor R9 are respectively connected to the NetB point and the base of the second transistor T2, and both ends of the tenth resistor R10 are respectively connected to the NetB point and the emission of the second transistor T2
  • the two ends of the eleventh resistor R11 are respectively connected to the base and emitter of the second transistor T2, the base of the second transistor T2 is connected to the collector of the third transistor T3, and the The collector of the second transistor T2 is connected to the base of the third transistor T3, the base of the third transistor T3 is connected to the sleep signal interface SLEEP through the twelfth resistor R12, and the seventh capacitor C7 and the fourteenth resistor R14 are connected in parallel and the two ends of the parallel connection are respectively connected to the base and ground of the third transistor T3, and the emitter of the third transistor T3 is connected to the base of the fourth transistor T4 ,
  • the sixth capacitor C6 and the thirteenth resistor R13 are connected in parallel and the two ends of the parallel connection are respectively connected to the base and ground of the fourth
  • the first MOS tube Q1 is an N-channel MOS tube
  • the MOS transistor Q5 is a P-channel MOS transistor
  • the first transistor T1 and the second transistor T2 are PNP transistors
  • the third transistor T3 and the fourth transistor T4 are NPN transistors.
  • the resistance detection circuit 140 includes a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a fifth transistor T5, a sixth transistor T6, a seventh transistor T7, a ninth capacitor C9, and a voltage reference source.
  • the emitter of the sixth transistor T6 is connected to the first port DYD through the sixteenth resistor R16, the collector of the sixth transistor T6 is connected to the anode of the voltage reference source U1, the The base of the sixth transistor T6 is connected to the base of the fifth transistor T5, the emitter of the fifth transistor T5 is connected to the first port DYD through the seventeenth resistor R17, and the fifth transistor The collector of T5 is floating, one end of the ninth capacitor C9 is connected to the first port, the other end of the ninth capacitor C9 is connected to the emitter of the sixth transistor T6, and the seventh transistor T7 The emitter is connected to the base of the fifth transistor T5, the base of the seventh transistor T7 is connected to the anode of the voltage reference source U1, and the emitter of the seventh transistor T7 is connected to the voltage reference source U1.
  • the reference voltage output terminal of the voltage reference source U1 is connected to the signal access port CC1 through the eighteenth resistor R18, and the cathode of the voltage reference source U1 is
  • the voltage of the reference voltage output terminal of the voltage reference source U1 is constant at 2.5V, and the resistance detection circuit 140 is equivalent to a constant current source of 0.454mA, that is, the current at the signal access port CC1 is constant at 0.454mA.
  • Internal charger control circuit CC signal by detecting the resistance R A of the vehicle body to the vehicle to determine whether the plug socket are fully connected with the vehicle, and determines the charging current connecting means (cables) of the rated capacity.
  • FIG. 2A, FIG. 2B, and FIG. 2C are schematic diagrams of the conduction of each device when the sleep circuit of the vehicle charger shown in FIG. 1 is in different states.
  • Figure 2A is a diagram showing the conduction of various components in the sleep circuit of the on-board charger when the charging gun is not inserted.
  • the CC signal is disconnected to the vehicle body ground
  • Ucc1 is about 9V, which is greater than the breakdown voltage of the first Zener diode ZD1
  • the third MOS tube Q3 and the second MOS tube Q2 Is turned on
  • the drain of the third MOS transistor Q3 is connected to the NetA point
  • the NetA point is pulled to a low level
  • the fourth MOS transistor Q4 is turned off
  • the drain of the fourth MOS transistor Q4 is connected to the point NetA.
  • the gate of the first MOS tube Q1 is at a high level, and the first MOS tube Q1 is turned off.
  • the drain of the second MOS transistor Q2 is connected to the gate of the fifth MOS transistor Q5, so the drain of the second MOS transistor Q2 and the gate of the fifth MOS transistor Q5 are both pulled low Level, the fifth MOS transistor Q5 is turned off, the drain of the fifth MOS transistor Q5 is at a high level, the base of the first transistor T1 is also at a high level, the first transistor T1 is turned off, and the The collector of the first transistor T1 is at a low level, that is, the NetB point is at a low level.
  • the second conductive branch and the third conductive branch are conductive.
  • the current flowing through the fifth resistor R5 in the second conductive branch is 24uA
  • the current flowing through the fourth resistor R4 is 40uA
  • the current flowing through the sixth resistor R6 in the third conductive branch The current is 24uA
  • the quiescent current flowing in the second conductive branch and the third conductive branch is 88uA in total, which meets the requirement that the quiescent current of the unplugged gun is less than 200uA.
  • Figure 2B is a diagram showing the conduction of various components in the sleep circuit of the vehicle charger when the charging gun is inserted.
  • the CC signal is connected to the body ground through a resistance of 100/220/680/1500/3300 ⁇ , Ucc1 ⁇ 3.3V, the first Zener diode ZD1 is cut off, and the third MOS tube Q3 and The second MOS transistor Q2 is turned off, the NetA point is at a high level, the fourth MOS transistor Q4 is turned on, the drain of the fourth MOS transistor Q4 and the gate of the first MOS transistor Q1 When pulled to a low level, the first MOS transistor Q1 is turned on.
  • the drain of the second MOS transistor Q2 is connected to the gate of the fifth MOS transistor Q5, so the drain of the second MOS transistor Q2 and the gate of the fifth MOS transistor Q5 are both high ,
  • the fifth MOS transistor Q5 is turned on, the drain of the fifth MOS transistor Q5 and the base of the first transistor T1 are both pulled to a low level, the first transistor T1 is turned on, and the The collector of the first transistor T1 is at a high level, that is, the NetB point is at a high level.
  • the second conductive branch and the third conductive branch are cut off, the first conductive branch and the fourth conductive branch are conductive, in addition, the internal control circuit of the charger is also in working state, and the on-board charger
  • the current consumption of the control system is about 100mA.
  • Figure 2C is a diagram showing the conduction of each device when the on-board charger control system enters a low-power sleep state when the charging gun is not pulled out after the charging is completed.
  • the signal CC When fully charged, charging gun when not pulled, the signal CC is still connected via the resistor R A and the vehicle body between the vehicle body, the vehicle but this time to the internal low-voltage battery charger does not need to continue to supply the control circuit, in order to reduce The power consumption of the vehicle low-voltage battery requires the vehicle charger control system to enter a low-power sleep state.
  • the specific implementation method is: a high-level pulse signal with a duration of 20ms is provided at the sleep signal interface SLEEP, and the second transistor T2, the third transistor T3 and the peripheral resistors and capacitors constitute a self-locking circuit, the collector of the third transistor T3 and the base of the second transistor T2 are pulled to a low level, and the second transistor T2 is conductive.
  • the collector of the second transistor T2 and the base of the third transistor T3 are high, and then the high-level pulse signal is removed, and the second transistor T2 and the third transistor T3 still remain Is turned on, the fourth transistor T4 is turned on, the NetA point is pulled to a low level, the fifth resistor R5 is grounded through the fourth transistor T4, and the fourth MOS transistor Q4 changes from on to In the cut-off state, the first MOS tube Q1 changes from conducting to the cut-off state, the first conductive branch is cut off, the on-board low-voltage battery stops supplying power to the on-board charger control system, and the on-board charger enters an ultra-low-power sleep status.
  • the first conductive branch, the second conductive branch and the third conductive branch are cut off, the fourth conductive branch is turned on, and the power consumption of the on-board charger control system is determined by the fourth conductive branch ,
  • the fifth resistor R5, the sleep control circuit and the resistance detection circuit generate a current power consumption of about 1.67 mA for the on-board charger control system, which meets the requirement that the quiescent current of the plug-in gun is less than 3 mA.
  • the vehicle-mounted charger enters a low-power sleep state, such as unplugging the charging gun
  • the CC signal is disconnected from the vehicle body ground
  • Ucc1 is about 9V
  • the third MOS tube Q3 is turned on
  • the fourth MOS transistor Q4 is off
  • the first MOS transistor Q1 is off
  • the second MOS transistor Q2 is on
  • the fifth MOS transistor Q5 is off
  • the NetA point is low
  • the NetB point is low.
  • the duration of the high-level pulse signal may be greater than 10 ms.
  • the selected time in the embodiment of the application is 20 ms, which is not limited.
  • the power consumption of the on-board charger control system is low, thereby prolonging the use time of the on-board low-voltage battery, and the circuit is simple and easy to implement, and has strong reliability.
  • an embodiment of the present application provides a switching power supply, and the switching power supply includes the on-board charger sleep circuit provided in any of the above application embodiments.
  • the disclosed device can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the above-mentioned units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or integrated. To another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical or other forms.
  • the units described above as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

Abstract

La présente invention concerne un circuit de veille d'un chargeur embarqué, qui est appliqué à un système de commande de chargeur embarqué et qui comprend un premier circuit de filtrage, un second circuit de filtrage, un circuit d'entrée de signal, un circuit de détection de résistance et un circuit intermédiaire : le premier circuit de filtrage et le circuit intermédiaire sont connectés ; le circuit intermédiaire et le second circuit de filtrage sont connectés ; et le circuit intermédiaire comprend une première branche conductrice, une deuxième branche conductrice, une troisième branche conductrice, une quatrième branche conductrice, un premier port, un deuxième port, un troisième port et un port d'accès au signal. Le second port est mis à la terre, une extrémité du circuit d'entrée de signal est connectée au circuit intermédiaire au moyen du port d'accès au signal, l'autre extrémité du circuit d'entrée de signal est mise à la terre, une extrémité du circuit de détection de résistance est connectée au circuit d'entrée de signal au moyen du port d'accès au signal, et l'autre extrémité du circuit de détection de résistance est connectée au premier port. La présente invention intègre un dispositif de commande de véhicule dans un circuit de guidage et de commande d'entrée de chargeur embarqué dans un système de commande de chargeur embarqué, ce qui abaisse les coûts globaux et renforce la fiabilité.
PCT/CN2019/084025 2019-04-24 2019-04-24 Circuit de veille de chargeur embarqué WO2020215233A1 (fr)

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CN201980004978.6A CN111315612B (zh) 2019-04-24 2019-04-24 车载充电机休眠电路
PCT/CN2019/084025 WO2020215233A1 (fr) 2019-04-24 2019-04-24 Circuit de veille de chargeur embarqué

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CN113765192A (zh) * 2021-09-26 2021-12-07 安徽师范大学 一种蓄电池充电防反接电路
CN114123379A (zh) * 2021-10-18 2022-03-01 东风柳州汽车有限公司 电池包充电连接确认方法及装置
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