CN111315612B - Sleep circuit of vehicle-mounted charger - Google Patents

Sleep circuit of vehicle-mounted charger Download PDF

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Publication number
CN111315612B
CN111315612B CN201980004978.6A CN201980004978A CN111315612B CN 111315612 B CN111315612 B CN 111315612B CN 201980004978 A CN201980004978 A CN 201980004978A CN 111315612 B CN111315612 B CN 111315612B
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transistor
circuit
vehicle
resistor
mos transistor
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CN201980004978.6A
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CN111315612A (en
Inventor
胡定高
赵德琦
吴壬华
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Shenzhen Shinry Technologies Co Ltd
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Shenzhen Shinry Technologies Co Ltd
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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

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

Abstract

The application discloses on-vehicle machine dormancy circuit that charges is applied to on-vehicle machine control system that charges, including first filter circuit, second filter circuit, signal input circuit, resistance detection circuit and intermediate circuit, wherein: first filter circuit and intermediate circuit are connected, intermediate circuit and second filter circuit are connected, intermediate circuit includes first electrically conductive branch road, the electrically conductive branch road of second, the electrically conductive branch road of third, the electrically conductive branch road of fourth, first port, the second port, third port and signal access port, the second port ground connection, signal input circuit one end is passed through signal access port and intermediate circuit and is connected, signal input circuit's the other end ground connection, resistance detection circuit's one end is passed through signal access port and signal input circuit and is connected, first port is connected to resistance detection circuit's the other end. According to the method and the device, the vehicle control device in the input control guide circuit of the vehicle-mounted charger is integrated into the control system of the vehicle-mounted charger, so that the overall cost is reduced, and the reliability is high.

Description

Sleep circuit of vehicle-mounted charger
Technical Field
The application relates to the technical field of vehicle-mounted chargers, in particular to a sleep circuit of a vehicle-mounted charger.
Background
With the popularization of electric vehicles, more and more vehicle factories require that a vehicle control device in a vehicle-mounted charger input control guide circuit is integrated into the vehicle-mounted charger. How to meet the requirement and simultaneously meet the requirements of the whole vehicle on the static current of the vehicle-mounted charger control circuit without gun insertion and the static current of the gun insertion dormancy is a problem which is always relatively troublesome.
Disclosure of Invention
The embodiment of the application provides a sleep circuit of a vehicle-mounted charger, a vehicle control device in an input control guide circuit of the vehicle-mounted charger is integrated into the vehicle-mounted charger, the overall cost is reduced, and the reliability is high.
In a first aspect, an embodiment of the present application provides a vehicle-mounted charger sleep circuit, which is applied to a vehicle-mounted 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 with the intermediate circuit, the intermediate circuit is connected with the second filter circuit, the intermediate circuit comprises a first conductive branch, a second conductive branch, a third conductive branch, a fourth conductive branch, a first port, a second port, a third port and a signal access port, the first port is connected with the positive electrode of the vehicle-mounted low-voltage storage battery through a first fuse and a first diode which is reversely connected, the second port is grounded, the third port is connected with a control circuit in a charger, one end of the signal input circuit is connected with 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 with the signal input circuit through the signal access port, and the other end of the resistance detection circuit is connected with the first port;
the first filter circuit and the second filter circuit are used for filtering and stabilizing voltage, the signal input circuit is used for introducing CC signals, the CC signals are charging connection confirmation signals, and the resistance detection circuit is used for detecting the resistance of the CC signals to the ground of a vehicle body;
the intermediate circuit is used for controlling the connection and disconnection of the vehicle-mounted low-voltage storage battery and the vehicle-mounted charger control system, when the intermediate circuit is in a conducting state, the vehicle-mounted low-voltage storage battery is in conducting connection with the vehicle-mounted charger control system, and the vehicle-mounted low-voltage storage battery supplies power to the vehicle-mounted charger control system; when the intermediate circuit is in a disconnected state, the vehicle-mounted low-voltage storage battery is disconnected with the vehicle-mounted charger control system, and the vehicle-mounted low-voltage storage battery stops supplying power to the vehicle-mounted charger control system.
In one embodiment, the first filter circuit comprises a first capacitor and a second capacitor, two ends of the first capacitor and the second capacitor which are connected in parallel are respectively connected with the third port and the ground, and the third port is connected with the drain of the first MOS transistor; the second filter circuit comprises a fourth capacitor, a fifth capacitor and a first transient suppression diode, and two ends of the fourth capacitor, the fifth capacitor and the first transient suppression diode which are connected in parallel are respectively connected with the first port and the ground.
In one embodiment, the first conducting branch includes the first MOS transistor, a fourth MOS transistor, a first resistor, a second zener diode, and a fourth zener diode, two ends of the first resistor are respectively connected to the gate of the first MOS transistor and the source of the first MOS transistor, the source of the first MOS transistor is connected to the first port, the fourth zener diode is connected to the first resistor in parallel, two ends of the second resistor are respectively connected to the gate of the first MOS transistor and the drain of the fourth MOS transistor, a cathode of the second zener diode is connected to the gate of the fourth MOS transistor, and an anode of the second zener diode is grounded.
In one embodiment, the second conducting branch includes a third MOS transistor, a first zener diode, a fourth resistor, and a fifth resistor, two ends of the fifth resistor are respectively connected to the first port and 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, the anode of the first zener diode is connected to the signal access port, and two ends of the fourth resistor are respectively connected to the gate of the third MOS transistor and the ground.
In an embodiment, the third conducting branch includes a second MOS transistor, a sixth resistor, and a fifth zener diode, two ends of the sixth resistor are respectively connected to the first port and the drain of the second MOS transistor, a cathode of the fifth zener diode is connected to the drain of the second MOS transistor, an anode of the fifth zener diode is grounded, a gate of the second MOS transistor is connected to the gate of the third MOS transistor, and a source of the second MOS transistor is grounded.
In one embodiment, the fourth conducting branch includes a fifth MOS transistor, a first transistor, a seventh resistor, an eighth resistor, a NetB point, and a sleep control circuit, two ends of the eighth resistor are respectively connected to 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, the collector of the first transistor is connected to the NetB point, two ends of the seventh resistor 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 fifth 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.
In one embodiment, the signal input circuit includes a third resistor, a third zener diode, a third capacitor, and a CC signal interface, two ends of the third resistor are respectively connected to the CC signal interface and the signal access port, a negative electrode of the third zener diode is connected to the signal access port, an anode of the third zener diode is grounded, and the third capacitor is connected in parallel to the third zener diode.
In one embodiment, 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, a third transistor, a fourth transistor, a sixth capacitor, a seventh capacitor, an eighth capacitor, and a sleep signal interface, wherein:
both ends of the ninth resistor are connected to the NetB point and the base of the second transistor, both ends of the tenth resistor are connected to the NetB point and the emitter of the second transistor, both ends of the eleventh resistor are 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 second 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, both ends of the seventh capacitor and the fourteenth resistor connected in parallel are connected to the base of the third transistor and the ground, the emitter of the third transistor is connected to the base of the fourth transistor, both ends of the sixth capacitor and the thirteenth resistor connected in parallel are connected to the base of the fourth transistor and the ground, a collector of the fourth transistor is connected with a drain of the third MOS transistor, an emitter of the fourth transistor is grounded, and two ends of the eighth capacitor and the fifteenth resistor, which are connected in parallel, are respectively connected with the sleep signal interface and the ground.
In one embodiment, the first MOS transistor is an N-channel MOS transistor, the second MOS transistor, the third MOS transistor, the fourth MOS transistor and the fifth MOS transistor are P-channel MOS transistors, the first transistor and the second transistor are PNP transistors, and the third transistor and the fourth transistor are NPN transistors.
In a second aspect, an embodiment of the present application provides a switching power supply, which includes the sleep circuit of the vehicle-mounted charger disclosed in the first aspect of the embodiment of the present application.
In the embodiment of the application, the sleep circuit of the vehicle-mounted charger is applied to a control system of the vehicle-mounted charger, and comprises 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 with the intermediate circuit, the intermediate circuit is connected with the second filter circuit, the intermediate circuit comprises a first conductive branch circuit, a second conductive branch circuit, a third conductive branch circuit, a fourth conductive branch circuit, a first port, a second port, a third port and a signal access port, the first port is connected with the positive pole of the vehicle-mounted low-voltage storage battery through a first fuse and a first diode which is reversely connected, the second port is grounded, the third port is connected with an internal control circuit of the charger, one end of the signal input circuit is connected with the intermediate circuit through the signal access port, and the other end of the signal input circuit is grounded, one end of the resistance detection circuit is connected with the signal input circuit through the signal access port, and the other end of the resistance detection circuit is connected with the first port; the first filter circuit and the second filter circuit are used for filtering and stabilizing voltage, the signal input circuit is used for introducing CC signals, the CC signals are charging connection confirmation signals, and the resistance detection circuit is used for detecting the resistance of the CC signals to the ground of a vehicle body; the intermediate circuit is used for controlling the connection and disconnection of the vehicle-mounted low-voltage storage battery and the vehicle-mounted charger control system, when the intermediate circuit is in a conducting state, the vehicle-mounted low-voltage storage battery is in conducting connection with the vehicle-mounted charger control system, and the vehicle-mounted low-voltage storage battery supplies power to the vehicle-mounted charger control system; when the intermediate circuit is in a disconnected state, the vehicle-mounted low-voltage storage battery is disconnected with the vehicle-mounted charger control system, and the vehicle-mounted low-voltage storage battery stops supplying power to the vehicle-mounted charger control system. Therefore, compared with the common vehicle control device which inputs the vehicle-mounted charger into the control guide circuit through the single chip microcomputer and is integrated into the vehicle-mounted charger, the vehicle-mounted charger meets the requirement in a logic circuit mode, not only is the overall cost reduced, but also the reliability is high.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a sleep circuit of a vehicle-mounted charger according to an embodiment of the present application;
fig. 2A is a schematic diagram illustrating the conduction of each device when a charging gun is not inserted into the sleep circuit of the vehicle-mounted charger shown in fig. 1;
FIG. 2B is a diagram illustrating the conduction of the devices when the charging gun is inserted into the sleep circuit of the vehicle-mounted charger shown in FIG. 1;
fig. 2C is a diagram of the conduction condition of each device when the vehicle-mounted charger control system is in a low power consumption sleep state after the charging of the sleep circuit of the vehicle-mounted charger shown in fig. 1 is completed and the charging gun is not pulled out.
Detailed Description
In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort shall fall within the protection scope of the present application.
The following are detailed below.
The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein may be combined with other embodiments.
Hereinafter, some terms in the present application are explained to facilitate understanding by those skilled in the art.
Generally, commercial power is transmitted to a main transformer of the vehicle-mounted charger through circuits such as a charging pile and a rectifying filter, and then transmitted to a power battery pack through circuits such as a rectifying filter, and then transmitted to a vehicle-mounted low-voltage storage battery through circuits such as a DC/DC conversion circuit and a rectifying filter, and a vehicle control device controls the vehicle-mounted low-voltage storage battery to supply power to a vehicle-mounted charger control system. In order to meet the requirement of the electric automobile industry on integration of internal devices of an electric automobile, more and more vehicle factories require that a vehicle control device in a vehicle-mounted charger input control guide circuit is integrated into the vehicle-mounted charger, the requirement is generally realized by a single chip microcomputer in the industry at present, and because the single chip microcomputer has the problems of poor control reliability and high cost, the embodiment of the application provides a vehicle-mounted charger sleeping circuit applied to a vehicle-mounted charger control system, the requirement is realized in a logic circuit mode, and the vehicle-mounted charger sleeping circuit comprises 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 with the intermediate circuit, the intermediate circuit is connected with the second filter circuit, the intermediate circuit comprises a first conductive branch circuit, a second conductive branch circuit, a third conductive branch circuit, a fourth conductive branch circuit, a first port, a second port, a third port and a signal access port, the first port is connected with the anode of the vehicle-mounted low-voltage storage battery through a first fuse and a first diode which is reversely connected, the second port is grounded, the third port is connected with an internal control circuit of a charger, one end of the signal input circuit is connected with 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 with the signal input circuit through the signal access port, and the other end of the resistance detection circuit is connected with the first port;
the first filter circuit and the second filter circuit are used for filtering and stabilizing voltage, the signal input circuit is used for introducing a CC signal, the CC signal is a charging connection confirmation signal, and the resistance detection circuit is used for detecting the resistance of the CC signal to the ground of the vehicle body;
the intermediate circuit is used for controlling the connection and disconnection of the vehicle-mounted low-voltage storage battery and the vehicle-mounted charger control system, when the intermediate circuit is in a conducting state, the vehicle-mounted low-voltage storage battery is in conducting connection with the vehicle-mounted charger control system, and the vehicle-mounted low-voltage storage battery supplies power to the vehicle-mounted charger control system; when the intermediate circuit is in a disconnected state, the vehicle-mounted low-voltage storage battery is disconnected with the vehicle-mounted charger control system, and the vehicle-mounted low-voltage storage battery stops supplying power to the vehicle-mounted charger control system. Therefore, compared with the common vehicle control device which inputs the vehicle-mounted charger into the control guide circuit through the single chip microcomputer and is integrated into the vehicle-mounted charger, the vehicle-mounted charger has the advantages that the requirement is met through the logic circuit, the overall cost is reduced, and the reliability is high.
Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a sleep circuit 100 of a vehicle-mounted charger according to an embodiment of the present disclosure, which is applied to a control system of the vehicle-mounted charger, and includes a first filter circuit 110, a second filter circuit 120, a signal input circuit 130, a resistance detection circuit 140, and an intermediate circuit 150, where:
the first filter circuit 110 is connected with the intermediate circuit 150, the intermediate circuit 150 is connected with the second filter circuit 120, the intermediate circuit 150 includes a first conductive branch 151, a second conductive branch 152, a third conductive branch 153, a fourth conductive branch 154, a first port DYD, a second port GND, a third port LVS and a signal access port CC1, the first port DYD is connected with the positive electrode of the vehicle-mounted low-voltage storage battery through a first fuse F1 and a first diode D1 connected in reverse, the second port GND is grounded, the third port LVS is connected with an internal control circuit of the charger, one end of the signal input circuit 130 is connected with the intermediate circuit 150 through the signal access port CC1, the other end of the signal input circuit 130 is grounded, one end of the resistance detection circuit 140 is connected with the signal input circuit 130 through the signal access port CC1, the other end of the resistance detection circuit 140 is connected to the first port DYD.
The first filter circuit 110 and the second filter circuit 120 are configured to filter and stabilize voltage, the signal input circuit 130 is configured to introduce a CC signal, the CC signal is a charging connection confirmation signal, the resistance detection circuit 140 is configured to detect a resistance of the CC signal to a vehicle body ground, the intermediate circuit 150 is configured to control connection and disconnection between the vehicle-mounted low-voltage battery and the vehicle-mounted charger control system, when the intermediate circuit 150 is in a conducting state, the vehicle-mounted low-voltage battery is in conducting connection with the vehicle-mounted charger control system, and the vehicle-mounted low-voltage battery supplies power to the vehicle-mounted charger control system; when the intermediate circuit 150 is in a disconnected state, the vehicle-mounted low-voltage storage battery is disconnected from the vehicle-mounted charger control system, and the vehicle-mounted low-voltage storage battery stops supplying power to the vehicle-mounted charger control system.
The positive electrode of the vehicle-mounted low-voltage storage battery is 12V, the first fuse F1 is used for limiting the peak value of current, the protection circuit runs safely, and when a short circuit occurs inside the circuit, the external power supply is influenced, and the first diode D1 is used for limiting the direction of the current and preventing the positive electrode of the vehicle-mounted low-voltage storage battery from being reversely connected with GND.
In one possible example, the first filter circuit 110 includes a first capacitor C1 and a second capacitor C2, two ends of the first capacitor C1 and the second capacitor C2 which are connected in parallel are respectively connected to the third port LVS and the ground, and 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, and two ends of 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 transient spike voltage at the input terminal.
In one possible example, the first conducting 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, two 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, the source of the first MOS transistor Q1 is connected to the first port DYD, the fourth zener diode ZD4 is connected in parallel to the first resistor R1, two ends of the second resistor R2 are respectively connected to the gate of the first MOS transistor Q1 and the drain of the fourth MOS transistor, the cathode 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.
In one possible example, the second conducting branch 152 includes a third MOS transistor Q3, a first zener diode ZD1, a fourth resistor R4, and a fifth resistor R5, two ends of the fifth resistor R5 are respectively connected to the first port DYD and the drain of the third MOS transistor Q3, the source of the third MOS transistor Q3 is grounded, the cathode of the first zener diode ZD1 is connected to 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 two ends of the fourth resistor R4 are respectively connected to the gate of the third MOS transistor Q3 and the second port GND.
In one possible example, the third conducting branch 153 includes a second MOS transistor Q2, a sixth resistor R6, and a fifth zener diode ZD5, two ends of the sixth resistor R6 are respectively connected to the first port DYD and the drain of the second MOS transistor Q2, a cathode of the fifth zener diode ZD5 is connected to the drain of the second MOS transistor Q2, an anode of the fifth zener diode ZD5 is connected to the second port GND, a gate of the second MOS transistor Q2 is connected to the gate of the third MOS transistor Q3, and a source of the second MOS transistor Q2 is connected to the second port GND.
In one possible example, the fourth conducting 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, two ends of the eighth resistor 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 further connected to the first port DYD, the collector of the first transistor T1 is connected to the NetB point, 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, the gate of the fifth MOS transistor Q5 is connected to the drain of the second MOS transistor Q2, the source of the fifth 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 is grounded.
In one possible example, the signal input circuit 130 includes a third resistor R3, a third zener diode ZD3, a third capacitor C3, and a CC signal interface, two ends of the third resistor R3 are respectively connected to the CC signal interface and the signal access port CC1, a cathode of the third zener diode ZD3 is connected to the signal access port CC1, an anode of the third zener diode ZD3 is grounded, and the third capacitor C3 is connected in parallel to the third zener diode ZD 3.
In the above embodiment, the breakdown voltage of the first zener diode ZD1 is 3.3V for limiting the minimum gate voltage required for the third MOS transistor Q3 to turn on, and the breakdown voltages of the second to fifth zener diodes (ZD2 to ZD5) are 15V for clamping to prevent overvoltage.
In one possible example, 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, a fifteenth resistor R15, a second transistor T2, a third transistor T3, a fourth transistor T4, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, and a SLEEP signal interface SLEEP, wherein:
two ends of the ninth resistor R9 are connected to the NetB point and the base of the second transistor T2, two ends of the tenth resistor R10 are connected to the NetB point and the emitter of the second transistor T2, two ends of the eleventh resistor R11 are connected to the base and the emitter of the second transistor T2, the base of the second transistor T2 is connected to the collector of the third transistor T3, 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 via the twelfth resistor R12, two ends of the seventh capacitor C7 and the fourteenth resistor R14 which are connected in parallel are connected to each other are connected to the base of the third transistor T3 and ground, the emitter of the third transistor T3 is connected to the base of the fourth transistor T4, and two ends of the sixth capacitor C6 and the thirteenth resistor R13 which are connected in parallel are connected to the fourth transistor T13 and to each other ends of the fourth transistor T4 The base of the transistor T4 is connected to ground, the collector of the fourth transistor T4 is connected to the drain of the third MOS transistor Q3, the emitter of the fourth transistor T4 is grounded, and the SLEEP signal interface SLEEP and ground are connected to the two parallel ends of the eighth capacitor C8 and the fifteenth resistor R15, respectively.
In one possible example, the first MOS transistor Q1 is an N-channel MOS transistor, the second MOS transistor Q2, the third MOS transistor Q3, the fourth MOS transistor Q4 and the fifth MOS transistor Q5 are P-channel MOS transistors, the first transistor T1 and the second transistor T2 are PNP transistors, and the third transistor T3 and the fourth transistor T4 are NPN transistors.
Wherein, 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 U1, an emitter of the sixth transistor T6 is connected to the first port DYD through the sixteenth resistor R16, a collector of the sixth transistor T6 is connected to an anode of the voltage reference source U1, a base of the sixth transistor T6 is connected to a base of the fifth transistor T5, an emitter of the fifth transistor T5 is connected to the first port DYD through the seventeenth resistor R17, a collector of the fifth transistor 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 an emitter of the sixth transistor T6, and a base of the seventh transistor T7 is connected to a base of the fifth transistor T5, the base electrode of the seventh transistor T7 is connected to the anode of the voltage reference source U1, the emitter electrode of the seventh transistor T7 is connected to the reference voltage output end of the voltage reference source U1, the reference voltage output end 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 connected to the signal access port CC 1.
The voltage of the reference voltage output end of the voltage reference source U1 is constantly 2.5V, and the resistance detection circuit 140A constant current source equivalent to 0.454mA, namely, the current at the signal access port CC1 is constant to 0.454mA, and the resistance R of the CC signal to the ground of the vehicle body can be obtained by detecting the voltage Ucc1 at the signal access port CC1AThe method specifically comprises the following steps:
Figure BDA0002443515900000101
the control circuit in the charger detects the resistance R of the CC signal to the ground of the vehicle bodyATo determine whether the vehicle plug and the vehicle receptacle are completely connected and to determine the current rated capacity of the charging connection device (cable).
Please refer to fig. 2A, fig. 2B, and fig. 2C, which are schematic diagrams illustrating the conduction status of each device when the sleep circuit of the vehicle charger shown in fig. 1 is in different states.
Fig. 2A is a diagram illustrating the conducting state of each device in the sleep circuit of the vehicle-mounted charger when the charging gun is not plugged. When the charging gun is not plugged, the CC signal is disconnected to the ground of the vehicle body, the Ucc1 is about 9V and is greater than the breakdown voltage of the first voltage-stabilizing diode ZD1, the third MOS transistor Q3 and the second MOS transistor Q2 are turned on, the drain electrode of the third MOS transistor Q3 is connected to the NetA point, then the NetA point is pulled to the low level, the fourth MOS transistor Q4 is turned off, the drain electrode of the fourth MOS transistor Q4 and the gate electrode of the first MOS transistor Q1 are at the high level, the first MOS transistor Q1 is turned off, and the vehicle-mounted low-voltage battery does not supply power to the vehicle-mounted charger control system because the first MOS transistor Q1 and the fourth MOS transistor Q4 are turned off. The drain of the second MOS transistor Q2 is connected to the gate of the fifth MOS transistor Q5, so that the drain of the second MOS transistor Q2 and the gate of the fifth MOS transistor Q5 are both pulled to a low level, the fifth MOS transistor Q5 is turned off, the drain of the fifth MOS transistor Q5 is a high level, the base of the first transistor T1 is also a high level, the first transistor T1 is turned off, the collector of the first transistor T1 is a low level, that is, the NetB point is a low level, in the entire vehicle charger sleep circuit, only the second conducting branch and the third conducting branch are turned on, the current flowing through the fifth resistor R5 in the second conducting branch is 24uA, the current flowing through the fourth resistor R4 is 40uA, the current flowing through the sixth resistor R6 in the third conducting branch is 24uA, and the static current flowing through the second conducting branch and the third conducting branch is 88uA, the requirement that the static current of the non-inserted gun is less than 200uA, which is required by the whole vehicle, is met.
Fig. 2B is a diagram illustrating the conduction status of each device in the sleep circuit of the vehicle-mounted charger when the charging gun is plugged. When a charging gun is plugged, the CC signal is connected with the ground of a vehicle body through a resistor of 100/220/680/1500/3300 omega, Ucc1 is less than 3.3V, the first zener diode ZD1 is cut off, the third MOS transistor Q3 and the second MOS transistor Q2 are cut off, the NetA point is high level, the fourth MOS transistor Q4 is conducted, the drain electrode of the fourth MOS transistor Q4 and the grid electrode of the first MOS transistor Q1 are pulled to low level, the first MOS transistor Q1 is conducted, and the first MOS transistor Q1 and the fourth MOS transistor Q4 are conducted, so the vehicle-mounted low-voltage storage battery supplies power to the vehicle-mounted charging machine control system, and a vehicle-mounted charger is awakened to enter a standby state. Since the drain of the second MOS transistor Q2 is connected to the gate of the fifth MOS transistor Q5, the drain of the second MOS transistor Q2 and the gate of the fifth MOS transistor Q5 are both at a high level, 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 collector of the first transistor T1 is at a high level, that is, the NetB point is at a high level. The second conducting branch and the third conducting branch are cut off, the first conducting branch and the fourth conducting branch are conducted, in addition, an internal control circuit of the charger is also in a working state, and the current power consumption of a vehicle-mounted charger control system is about 100 mA.
Fig. 2C is a diagram illustrating the conduction of each device when the vehicle-mounted charger control system enters a low-power-consumption sleep state after the charging is completed and the charging gun is not pulled out. When the charging gun is not pulled out after the charging is finished, the CC signal still passes through the resistor R between the resistance and the ground of the vehicle bodyAThe vehicle-mounted low-voltage storage battery is connected with a vehicle body, the vehicle-mounted low-voltage storage battery does not need to continuously supply power to a control circuit in a charger, and in order to reduce the power consumption of the vehicle-mounted low-voltage storage battery, a control system of the vehicle-mounted charger needs to enter a low-power-consumption dormant stateThe specific implementation mode is as follows: providing a high-level pulse signal with a duration of 20ms at the SLEEP signal interface SLEEP, wherein the second transistor T2 and the third transistor T3 and the peripheral resistor-capacitor 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, the second transistor T2 is turned on, the collector of the second transistor T2 and the base of the third transistor T3 are at a high level, after that, the high-level pulse signal is removed, the second transistor T2 and the third transistor T3 are still turned on, the fourth transistor T4 is turned on, the NetA point is pulled to a low level, the fifth resistor R5 is grounded via the fourth transistor T4, the fourth MOS transistor Q4 is turned on to an off state, the first transistor Q1 is turned on to an off state, the first conductive branch is turned off, and the vehicle-mounted low-voltage battery stops supplying power to the vehicle-mounted charger control system, and the vehicle-mounted charger enters an ultra-low power consumption dormant state. The first conducting branch, the second conducting branch with the third conducting branch is ended, the fourth conducting branch is conducted, the power consumption of the vehicle-mounted charger control system is controlled by the fourth conducting branch, the fifth resistor R5, the dormancy control circuit and the resistor detection circuit are generated, the current power consumption of the vehicle-mounted charger control system is about 1.67mA, and the requirement that the dormant quiescent current of the gun inserting required by the whole vehicle is smaller than 3mA is met.
When the vehicle-mounted charger enters a low-power-consumption sleep state, if a charging gun is pulled off, the CC signal is disconnected to the ground of a vehicle body, Ucc1 is about 9V, the third MOS tube Q3 is conducted, the fourth MOS tube Q4 is cut, the first MOS tube Q1 is cut, the second MOS tube Q2 is conducted, the fifth MOS tube Q5 is cut off, the NetA point is at a low level, the NetB point is at a low level, the self-locking circuit formed by the second transistor T2, the third transistor T3 and peripheral resistor-capacitor is reset, and the awakening function of the charger is not influenced after the vehicle-mounted charger is plugged again.
The duration of the high-level pulse signal is longer than 10ms, and in order to ensure that the sleep circuit of the vehicle-mounted charger receives the high-level pulse signal, the selected time in the embodiment of the application is 20ms, which is not limited.
Therefore, in the three states, the power consumption of the control system of the vehicle-mounted charger is low, so that the service life of the vehicle-mounted low-voltage storage battery is prolonged, and the control system of the vehicle-mounted charger is simple in circuit, easy to implement and high in reliability.
In one possible example, the embodiment of the present application provides a switching power supply, where the switching power supply includes the sleep circuit of the vehicle-mounted charger provided in any one of the embodiments of the present application.
It should be noted that for the sake of simplicity, the foregoing embodiments are described as a series of acts, but it should be understood by those skilled in the art that the present application is not limited by the described order of acts, as some steps may be performed in other orders or simultaneously according to the present application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application with specific examples, and the above description of the embodiments is only provided to help understand the present application and its core ideas; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in view of the above, the content of the present specification should not be construed as a limitation to the present application.

Claims (10)

1. The utility model provides a vehicle-mounted charger dormancy circuit which characterized in that, is applied to vehicle-mounted charger control system, includes first filter circuit, second filter circuit, signal input circuit, resistance detection circuit and intermediate circuit, wherein:
the first filter circuit is connected with the intermediate circuit, the intermediate circuit is connected with the second filter circuit, the intermediate circuit comprises a first conductive branch circuit, a second conductive branch circuit, a third conductive branch circuit, a fourth conductive branch circuit, a first port, a second port, a third port and a signal access port, the first port is connected with the positive electrode of the vehicle-mounted low-voltage storage battery through a first fuse and a first diode which is reversely connected, the second port is grounded, the third port is connected with a control circuit in a charger, one end of the signal input circuit is connected with 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 with the signal input circuit through the signal access port, and the other end of the resistance detection circuit is connected with the first port;
the first filter circuit and the second filter circuit are used for filtering and stabilizing voltage, the signal input circuit is used for introducing CC signals, the CC signals are charging connection confirmation signals, and the resistance detection circuit is used for detecting the resistance of the CC signals to the ground of a vehicle body;
the intermediate circuit is used for controlling the connection and disconnection of the vehicle-mounted low-voltage storage battery and the vehicle-mounted charger control system, when the intermediate circuit is in a conducting state, the vehicle-mounted low-voltage storage battery is in conducting connection with the vehicle-mounted charger control system, and the vehicle-mounted low-voltage storage battery supplies power to the vehicle-mounted charger control system; when the intermediate circuit is in a disconnected state, the vehicle-mounted low-voltage storage battery is disconnected with the vehicle-mounted charger control system, and the vehicle-mounted low-voltage storage battery stops supplying power to the vehicle-mounted charger control system;
the rated voltage of the vehicle-mounted low-voltage storage battery is 12V.
2. The vehicle-mounted charger sleeping circuit according to claim 1, characterized in that the first filter circuit comprises a first capacitor and a second capacitor, wherein two ends of the first capacitor and the second capacitor which are connected in parallel are respectively connected with the third port and ground, and the third port is connected with a drain electrode of a first MOS (metal oxide semiconductor) transistor;
the second filter circuit comprises a fourth capacitor, a fifth capacitor and a first transient suppression diode, wherein the fourth capacitor, the fifth capacitor and the first transient suppression diode are connected in parallel, and two ends of the parallel connection are respectively connected with the first port and the ground.
3. The vehicle-mounted charger sleep circuit according to claim 2, wherein the first conducting branch comprises the first MOS transistor, a fourth MOS transistor, a first resistor, a second zener diode, and a fourth zener diode, two ends of the first resistor are respectively connected to the gate of the first MOS transistor and the source of the first MOS transistor, the source of the first MOS transistor is connected to the first port, the fourth zener diode is connected in parallel to the first resistor, two ends of the second resistor are respectively connected to the gate of the first MOS transistor and the drain of the fourth MOS transistor, the cathode of the second zener diode is connected to the gate of the fourth MOS transistor, and the anode of the second zener diode is grounded.
4. The vehicle-mounted charger sleep circuit according to claim 3, wherein the second conducting branch comprises a third MOS tube, a first voltage regulator diode, a fourth resistor and a fifth resistor, two ends of the fifth resistor are respectively connected to the first port and a drain of the third MOS tube, a source of the third MOS tube is grounded, a cathode of the first voltage regulator diode is connected to a gate of the third MOS tube, an anode of the first voltage regulator diode is connected to the signal access port, and two ends of the fourth resistor are respectively connected to the gate of the third MOS tube and ground.
5. The vehicle-mounted charger sleep circuit according to claim 4, wherein the third conducting branch comprises a second MOS transistor, a sixth resistor and a fifth zener diode, two ends of the sixth resistor are respectively connected to the first port and the drain of the second MOS transistor, a cathode of the fifth zener diode is connected to the drain of the second MOS transistor, an anode of the fifth zener diode is grounded, a gate of the second MOS transistor is connected to the gate of the third MOS transistor, and a source of the second MOS transistor is grounded.
6. The vehicle-mounted charger sleep circuit according to claim 5, wherein the fourth conducting branch comprises a fifth MOS transistor, a first transistor, a seventh resistor, an eighth resistor, a NetB point and a sleep control circuit, two ends of the eighth resistor are respectively connected to an emitter of the first transistor and a base of the first transistor, the emitter of the first transistor is connected to the first port, a collector of the first transistor is connected to the NetB point, two ends of the seventh resistor are respectively connected to the base of the first transistor and a drain of the fifth MOS transistor, a gate of the fifth MOS transistor is connected to the drain of the second MOS transistor, a source of the fifth 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.
7. The vehicle-mounted charger sleeping circuit according to claim 1, characterized in that the signal input circuit comprises a third resistor, a third zener diode, a third capacitor and a CC signal interface, two ends of the third resistor are respectively connected to the CC signal interface and the signal access port, a cathode of the third zener diode is connected to the signal access port, an anode of the third zener diode is grounded, and the third capacitor is connected in parallel to the third zener diode.
8. The sleep circuit of the vehicle-mounted charger according to claim 6, wherein the sleep control circuit comprises a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a second transistor, a third transistor, a fourth transistor, a sixth capacitor, a seventh capacitor, an eighth capacitor, and a sleep signal interface, wherein:
both ends of the ninth resistor are connected to the NetB point and the base of the second transistor, both ends of the tenth resistor are connected to the NetB point and the emitter of the second transistor, both ends of the eleventh resistor are 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 second 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, both ends of the seventh capacitor and the fourteenth resistor connected in parallel are connected to the base of the third transistor and the ground, the emitter of the third transistor is connected to the base of the fourth transistor, both ends of the sixth capacitor and the thirteenth resistor connected in parallel are connected to the base of the fourth transistor and the ground, a collector of the fourth transistor is connected with a drain of the third MOS transistor, an emitter of the fourth transistor is grounded, and two ends of the eighth capacitor and the fifteenth resistor, which are connected in parallel and in parallel, are respectively connected with the sleep signal interface and the ground.
9. The vehicle-mounted charger sleep circuit of claim 8, wherein the first MOS transistor is an N-channel MOS transistor, the second MOS transistor, the third MOS transistor, the fourth MOS transistor, and the fifth MOS transistor are P-channel MOS transistors, the first transistor and the second transistor are PNP transistors, and the third transistor and the fourth transistor are NPN transistors.
10. A switching power supply, characterized in that it comprises a sleep circuit of a charger on board according to any one of claims 1 to 9.
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