CN210027071U - Vehicle-mounted charger sleep circuit and switching power supply - Google Patents

Vehicle-mounted charger sleep circuit and switching power supply Download PDF

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CN210027071U
CN210027071U CN201920570331.7U CN201920570331U CN210027071U CN 210027071 U CN210027071 U CN 210027071U CN 201920570331 U CN201920570331 U CN 201920570331U CN 210027071 U CN210027071 U CN 210027071U
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transistor
circuit
vehicle
resistor
mos transistor
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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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    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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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Abstract

The application discloses on-vehicle machine dormancy circuit and switching power supply 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 control system, 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

Vehicle-mounted charger sleep circuit and switching power supply
Technical Field
The utility model relates to a vehicle-mounted machine technical field that charges, concretely relates to vehicle-mounted machine dormancy circuit and switching power supply that charges.
Background
With the popularization of electric vehicles, more and more vehicle factories require that vehicle control devices in a vehicle-mounted charger input control guide circuit are 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.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a vehicle-mounted machine dormancy circuit and switching power supply charge, with on-vehicle machine input control guide circuit charge vehicle control device integrated to on-vehicle machine that charges in, reduced the overall cost, the good reliability.
In a first aspect, the embodiment of the utility model provides a vehicle-mounted machine dormancy circuit that charges is applied to vehicle-mounted machine control system that charges, including 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, 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 one 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 end 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 and 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.
The second aspect, the embodiment of the utility model provides a switching power supply, include the embodiment of the utility model provides a first aspect discloses a vehicle-mounted machine dormancy circuit that charges.
In the utility model, the vehicle-mounted charger dormancy circuit is applied to the vehicle-mounted charger control system, which 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, 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 anode of the vehicle-mounted low-voltage storage battery through a first fuse and a first diode connected in reverse, the second port is grounded, the third port is connected with the internal control circuit of the 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. It is thus clear that compare in general vehicle control device who will carry in the quick-witted input control guide circuit that charges through the singlechip and integrate to on-vehicle machine that charges, the embodiment of the utility model provides a mode through logic circuit has realized this demand, not only reduces overall cost, and the good reliability moreover.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the background of the present invention, the drawings related to the embodiments or the background of the present invention will be briefly described below.
Fig. 1 is a schematic structural diagram of a sleep circuit of a vehicle-mounted charger according to an embodiment of the present invention;
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 illustrating the conduction status 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 solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The terms "first," "second," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, system, 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 invention. 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 can be combined with other embodiments.
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. For satisfying the requirement that the electric automobile trade integrates to the inside device of electric automobile, more and more whole car factory requires to integrate the vehicle control device among the on-vehicle machine input control guide circuit that charges to on-vehicle machine that charges, generally realize this requirement through the singlechip in the trade at present, because the singlechip has control reliability poor, problem with high costs, the embodiment of the utility model provides a be applied to on-vehicle machine dormancy circuit that charges of on-vehicle machine control system, realized this requirement through logic circuit's mode, on-vehicle machine dormancy circuit includes first filter circuit, second filter circuit, signal input circuit, resistance detection circuitry 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 the 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.
The embodiments of the present invention 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 invention, 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, wherein:
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 used for filtering and stabilizing voltage, the signal input circuit 130 is used for introducing a CC signal, the CC signal is a charging connection confirmation signal, the resistance detection circuit 140 is used for detecting the resistance of the CC signal to a vehicle body ground, the intermediate circuit 150 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 150 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 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 vehicle-mounted low-voltage storage battery positive electrode is 12V, the first fuse F1 is used for limiting a current peak value, the protection circuit runs safely, the influence on external power supply is generated when a short circuit occurs inside the circuit, the first diode D1 is used for limiting the current direction, and the vehicle-mounted low-voltage storage battery positive electrode is prevented 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 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 the first port DYD and the second port GND are respectively connected to two ends of the fourth capacitor C4, the fifth capacitor C5 and the first transient suppression diode TVS which are connected in parallel and connected in parallel.
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 2 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, a source of the third MOS transistor Q3 is grounded, a cathode of the first zener diode ZD1 is connected to the gate of the third MOS transistor Q3, an 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 and preventing 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:
both ends of the ninth resistor R9 are connected to the NetB point and the base of the second transistor T2, both ends of the tenth resistor R10 are connected to the NetB point and the emitter of the second transistor T2, both 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 through the twelfth resistor R12, both ends of the seventh capacitor C7 and the fourteenth resistor R14 connected in parallel are connected to the base of the third transistor T3 and the ground, the emitter of the third transistor T3 is connected to the base of the fourth transistor T4, and both ends of the sixth capacitor C6 and the thirteenth resistor R13 connected in parallel are connected to the fourth transistor T13 and the fourth terminal connected in parallel A base of the transistor T4 and a ground, a collector of the fourth transistor T4 is connected to a drain of the third MOS transistor Q3, an emitter of the fourth transistor T4 is grounded, and two ends of the eighth capacitor C8 and the fifteenth resistor R15, which are connected in parallel, are respectively connected to the SLEEP signal interface SLEEP and the ground.
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 the 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 of the seventh transistor T7 is connected to the reference voltage output terminal of 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 connected to the signal access port CC 1.
The voltage of a reference voltage output end of the voltage reference source U1 is constantly 2.5V, the resistance detection circuit 140 is equivalent to a constant current source of 0.454mA, namely, the current at the signal access port CC1 is constantly 0.454mA, and the resistance R1 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 DEST_PATH_GDA0002278565900000101
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 fully 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 conduction status of each device in the sleep circuit of the vehicle-mounted charger when the charging gun is not plugged. When a 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 at a high level, the base of the first transistor T1 is also at a high level, the first transistor T1 is turned off, the collector of the first transistor T1 is at a low level, i.e., the NetB point is at 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 tube Q3 and the second MOS tube Q2 are cut off, the NetA point is at a high level, the fourth MOS tube Q4 is conducted, the drain electrode of the fourth MOS tube Q4 and the grid electrode of the first MOS tube Q1 are pulled to a low level, the first MOS tube Q1 is conducted, and the first MOS tube Q1 and the fourth MOS tube Q4 are conducted, so that the vehicle-mounted low-voltage storage battery supplies power to the vehicle-mounted charging machine control system, and the vehicle-mounted charging machine 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 schematic view of a chargerAnd after the electricity is completed and the charging gun is not pulled out, the on-state diagram of each device is obtained when the vehicle-mounted charging machine control system enters a low-power-consumption dormant state. 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 bodyABe connected with the automobile body ground, nevertheless on-vehicle low voltage battery need not continue to supply power for the internal control circuit of machine that charges this moment, in order to reduce the consumption of on-vehicle low voltage battery, need let on-vehicle charger control system get into low-power consumption dormancy state, and concrete implementation mode does: 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 Q4 is turned on to off, the first MOS Q1 is turned on to off, the first conductive branch is turned off, 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. First electrically conductive branch road, second electrically conductive branch road with third electrically conductive branch road ends, fourth electrically conductive branch road switches on, and on-vehicle charging machine control system power consumption by fourth electrically conductive branch road, fifth resistance R5, dormancy control circuit and resistance detection circuit produces, and on-vehicle charging machine control system current power consumption is about 1.67mA, satisfies the rifle of inserting dormancy quiescent current that whole car required and is less than 3 mA's requirement.
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, 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 time 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 is 20ms in the embodiment of the application, which is not limited.
Therefore, in the three states, the power consumption of the control system of the vehicle-mounted charger is lower, so that the service time of the vehicle-mounted low-voltage storage battery is prolonged, and the control system is simple in circuit, easy to implement and high in reliability.
In a possible example, an embodiment of the present invention 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 above embodiments.
It should be noted that, for the sake of simplicity, the aforementioned embodiments of the present invention are described as a series of combinations of actions, but it should be understood by those skilled in the art that the present invention is not limited by the described order of actions, because some steps can be performed in other orders or simultaneously according to the present invention. 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 by the invention.
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 several embodiments provided in the present disclosure, 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 invention 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 embodiments of the present invention have been described in detail, and the principles and embodiments of the present invention have been explained herein using specific embodiments, and the above description of the embodiments is only used to help understand the present invention and its core ideas; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there may be changes in the specific implementation and application scope, and in summary, the content of the present specification should not be understood as the limitation of the present invention.

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.
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, 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.
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 sleeping circuit according to claim 3, wherein the second conducting branch comprises a third MOS transistor, 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 the drain of the third MOS transistor, the source of the third MOS transistor is grounded, the cathode of the first voltage regulator diode is connected to the gate of the third MOS transistor, the 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 transistor 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 according to 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.
CN201920570331.7U 2019-04-24 2019-04-24 Vehicle-mounted charger sleep circuit and switching power supply Active CN210027071U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111315612A (en) * 2019-04-24 2020-06-19 深圳欣锐科技股份有限公司 Vehicle-mounted charger dormancy circuit
CN113147446A (en) * 2021-05-17 2021-07-23 阳光电源股份有限公司 Control device and method for vehicle-mounted charger
CN113271000A (en) * 2021-04-28 2021-08-17 精进电动科技股份有限公司 Awakening enabling circuit and motor controller
CN113970891A (en) * 2021-12-27 2022-01-25 深圳市恒讯通科技有限公司 Thing networking switch based on zero cross detection control

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111315612A (en) * 2019-04-24 2020-06-19 深圳欣锐科技股份有限公司 Vehicle-mounted charger dormancy circuit
CN113271000A (en) * 2021-04-28 2021-08-17 精进电动科技股份有限公司 Awakening enabling circuit and motor controller
CN113147446A (en) * 2021-05-17 2021-07-23 阳光电源股份有限公司 Control device and method for vehicle-mounted charger
CN113970891A (en) * 2021-12-27 2022-01-25 深圳市恒讯通科技有限公司 Thing networking switch based on zero cross detection control
CN113970891B (en) * 2021-12-27 2022-07-05 深圳市恒讯通科技有限公司 Thing networking switch based on zero cross detection control

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