CN212022359U - Charging gun with metering function - Google Patents
Charging gun with metering function Download PDFInfo
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- CN212022359U CN212022359U CN202020295811.XU CN202020295811U CN212022359U CN 212022359 U CN212022359 U CN 212022359U CN 202020295811 U CN202020295811 U CN 202020295811U CN 212022359 U CN212022359 U CN 212022359U
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- 238000005516 engineering process Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 17
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
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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
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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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- 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
- Y02T90/12—Electric charging stations
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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
- 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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- 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
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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Abstract
The utility model provides a rifle charges with measurement function, belongs to and fills electric pile measurement technical field, concretely relates to rifle charges with measurement function. The problem of current direct current charge when charging for electric automobile, the distance overlength between gauge meter and the rifle head that charges causes the electric energy consumption of measurement big, influences final electric energy measurement result is solved. The utility model discloses a charging gun with metering function, which comprises a gun body, a display screen and an electric energy metering device; the electric energy metering device comprises a current sensor, an operational amplifier circuit, a precision resistor voltage division circuit, a voltage and current signal conditioning circuit, an electric energy metering unit and a communication circuit; the electric energy metering unit calculates an electric energy signal by using the acquired voltage signal and current signal; and the electric energy signal obtained by calculation is sent to a display screen through a communication circuit. The utility model is suitable for an use as the rifle that charges.
Description
Technical Field
The utility model belongs to the technical field of fill electric pile measurement, concretely relates to rifle that charges that has measurement function.
Background
The electric automobile fills electric pile is the most basic electric power facility that charges of electric automobile. According to the national metrological verification regulation, maintenance work needs to be carried out on the whole pile regularly, and once the pile body is opened, the metrological performance of the whole pile needs to be verified again. Meanwhile, the whole pile detection generally needs to install a lead seal on the pile body, and the pile body is not allowed to be opened, but the pile body needs to be periodically maintained, so that certain contradiction exists between the whole pile detection and the maintenance.
If install electric energy metering device in the rifle that charges, both convenient examination, convenient charging pile periodic maintenance work again, and the antedisplacement of measurement point can reflect the actual electric energy that charges more accurately, avoids including cable and pile body relevant loss calculation, has maintained consumer's rights and interests, but the position of metering device and rifle that charges needs to pass through a very long section cable conductor at present, because the cable loss, causes the electric energy consumption of measurement big, influences final measurement result.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a solve current direct current and charge when charging for electric automobile, the distance overlength between gauge table meter and the rifle head that charges causes the electric energy consumption of measurement big, influences the problem of final electric energy measurement result, provides a novel rifle that charges with measurement function.
The utility model discloses a charging gun with measurement function, including charging gun body 1, the cable 3 has run through in the charging gun body 1, the charging pile is connected to one end of cable 3, the other end supplies power for electric automobile load through the charging head;
the electric energy meter also comprises a display screen 2 and an electric energy metering device 4;
the display screen 2 is embedded and fixed on the shell of the charging gun body 1;
the electric energy metering device 4 comprises a current sensor 401, an operational amplifier circuit 402, a precision resistance voltage division circuit 403, a voltage and current signal conditioning circuit 404, an electric energy metering unit 405 and a communication circuit 406;
the current sensor 401 is configured to collect a current signal on the cable 3 and output the collected current signal to a current signal input end of the operational amplifier circuit 402;
the precision resistance voltage division circuit 403 is used for acquiring a voltage signal on the cable 3 and outputting the acquired voltage signal to a voltage signal input end of the voltage and current signal conditioning circuit 404;
the operational amplifier circuit 402 amplifies the current signal and outputs the amplified current signal to the current sampling signal input terminal of the voltage/current signal conditioning circuit 404;
the voltage and current signal conditioning circuit 404 respectively performs analog-to-digital conversion on the received voltage signal and current signal and outputs the voltage signal and current signal to the signal input end of the electric energy metering unit 405;
the electric energy metering unit 405 calculates an electric energy signal using the received voltage signal and current signal; and the electric energy signal obtained by calculation is sent to the display screen 2 through the communication circuit 406; the electric energy metering device 4 is realized by adopting a chip with the model number of STM32F030C8T 6;
the display screen 2 is used for displaying the received electric energy signal;
the voltage and current signal conditioning circuit (404) comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, an AD sampling chip U1, a diode D1, a diode D2, a voltage-stabilizing diode U3, an optical coupling isolator U2, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, an electrolytic capacitor EC1, an electrolytic capacitor EC2, a voltage-stabilizing module U4 and a coil T1;
the AD sampling chip U1 is realized by a current mode boost converter with the model number of M1542, the voltage stabilizing module U4 is a chip with the model number of 78L05, a pin No. 1 of the AD sampling chip U1 is connected with one end of a resistor R7 through a capacitor C5, and the other end of the resistor R7 is a voltage signal input end of the voltage and current signal conditioning circuit 404;
the No. 2 pin of the AD sampling chip U1 is grounded;
the No. 3 pin of the AD sampling chip U1 is connected with one end of a resistor R4, and the other end of the resistor R4 is connected with one signal input end of a connecting electric energy metering unit (405);
the No. 4 pin of the AD sampling chip U1 is grounded;
the No. 5 pin of the AD sampling chip U1 is connected with the anode of a diode D2, and the cathode of the diode D2 is grounded through a resistor R2;
the negative electrode of the diode D2 is connected with one end of the capacitor C2, the other end of the capacitor C2 is connected with the dotted end of the primary side of the coil T1, and the unlike end of the primary side of the coil T1 is connected with the positive electrode of the D2; the other end of the capacitor C2 is also connected with a +5V power supply;
the dotted terminal of the secondary side of the coil T1 is connected with the unlike terminal of the secondary side of the coil T1 after sequentially passing through the capacitor C3, the capacitor C1 and the resistor R1;
the synonym terminal of the secondary side of the coil T1 is also connected with the anode of a diode D1, and the cathode of a diode D1 is connected with a 12V power supply;
the cathode of the diode D1 is connected to the other signal input end of the electric energy metering unit 405;
the same end of the secondary side of the coil T1 is also connected with the negative electrode of an electrolytic capacitor EC1, and the positive electrode of the electrolytic capacitor EC1 is connected with a 12V power supply; the negative electrode of the electrolytic capacitor EC1 is grounded;
a No. 6 pin of the AD sampling chip U1 is connected with a collector of the optocoupler isolator U2, and an emitter of the optocoupler isolator U2 is grounded; the positive electrode of the optocoupler isolator U2 is connected with a 12V power supply through a resistor R3; the positive electrode of the optocoupler isolator U2 is connected with one end of a capacitor C4 after sequentially passing through a resistor R6 and a resistor R5, and the other end of the capacitor C4 is connected with the negative electrode of the optocoupler isolator U2; one end of the capacitor C4 is connected with the control end of the voltage-stabilizing diode U3, the negative electrode of the voltage-stabilizing diode U3 is connected with the negative electrode of the opto-isolator U2, and the positive electrode of the voltage-stabilizing diode U3 is grounded; the control end of the voltage-stabilizing diode U3 is also grounded through a resistor R8;
the No. 7 pin of the AD sampling chip U1 is grounded;
the No. 8 pin of the AD sampling chip U1 is used as the current sampling signal input end of the voltage and current signal conditioning circuit 404 through the outgoing line of the capacitor C6;
no. 1 pin of the voltage stabilizing module U4 is connected with a 12V power supply, No. 2 pin of the voltage stabilizing module U4 is grounded, No. 3 pin of the voltage stabilizing module U4 is connected with a 5V power supply, No. 2 pin of the voltage stabilizing module U4 is connected with the cathode of the electrolytic capacitor EC2, and the anode of the electrolytic capacitor EC2 is connected with No. 3 pin of the voltage stabilizing module U4.
Further, the power supply circuit 6 is further included, and the power supply circuit 6 is used for supplying power to the operational amplification circuit 402, the voltage and current signal conditioning circuit 404, the electric energy metering unit 405 and the communication circuit 406.
Further, the operational amplifier circuit 402, the precision resistor voltage divider circuit 403, the voltage/current signal conditioning circuit 404, the electric energy metering unit 405, the communication circuit 406, and the power circuit 6 are integrated into a circuit module by using PCB technology.
The utility model replaces the traditional combination metering mode of the electric energy meter and the shunt in the electric energy metering process of the direct current charging pile, and moves the metering unit forward to the charging gun to complete the design of the charging gun with the electric energy metering function; the voltage and current acquisition and measurement are completed simultaneously, the measurement precision is improved, a device integration mode is adopted, the metering device is small in size, higher in installation convenience and electrical safety performance are achieved, and the characteristics of simplicity, convenience and intuition in charging measurement are achieved.
Drawings
Fig. 1 is a schematic structural diagram of a charging gun with a metering function according to the present invention;
fig. 2 is an electrical schematic block diagram of a charging gun with a metering function according to the present invention;
fig. 3 is a circuit diagram of the voltage-current signal conditioning circuit 404.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely 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 of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
The first embodiment is as follows: the present embodiment is described below with reference to fig. 1 to 3, and the charging gun with a metering function according to the present embodiment includes a charging gun body 1, a cable 3 penetrates through the charging gun body 1, one end of the cable 3 is connected to a charging pile, and the other end supplies power to a load of an electric vehicle through a charging head;
the electric energy meter also comprises a display screen 2 and an electric energy metering device 4;
the display screen 2 is embedded and fixed on the shell of the charging gun body 1;
the electric energy metering device 4 comprises a current sensor 401, an operational amplifier circuit 402, a precision resistance voltage division circuit 403, a voltage and current signal conditioning circuit 404, an electric energy metering unit 405 and a communication circuit 406;
the current sensor 401 is configured to collect a current signal on the cable 3 and output the collected current signal to a current signal input end of the operational amplifier circuit 402;
the precision resistance voltage division circuit 403 is used for acquiring a voltage signal on the cable 3 and outputting the acquired voltage signal to a voltage signal input end of the voltage and current signal conditioning circuit 404;
the operational amplifier circuit 402 amplifies the current signal and outputs the amplified current signal to the current sampling signal input terminal of the voltage/current signal conditioning circuit 404;
the voltage and current signal conditioning circuit 404 respectively performs analog-to-digital conversion on the received voltage signal and current signal and outputs the voltage signal and current signal to the signal input end of the electric energy metering unit 405;
the electric energy metering unit 405 calculates an electric energy signal using the received voltage signal and current signal; and the electric energy signal obtained by calculation is sent to the display screen 2 through the communication circuit 406; the electric energy metering device 4 is realized by adopting a chip with the model number of STM32F030C8T 6;
the display screen 2 is used for displaying the received electric energy signal;
the electric energy metering device 4 comprises a current sensor 401, an operational amplifier circuit 402, a precision resistance voltage division circuit 403, a voltage and current signal conditioning circuit 404, an electric energy metering unit 405 and a communication circuit 406;
the current sensor 401 is configured to collect a current signal on the cable 3 and output the collected current signal to a current signal input end of the operational amplifier circuit 402;
the precision resistance voltage division circuit 403 is used for acquiring a voltage signal on the cable 3 and outputting the acquired voltage signal to a voltage signal input end of the voltage and current signal conditioning circuit 404;
the operational amplifier circuit 402 amplifies the current signal and outputs the amplified current signal to the current sampling signal input terminal of the voltage/current signal conditioning circuit 404;
the voltage and current signal conditioning circuit 404 respectively performs analog-to-digital conversion on the received voltage signal and current signal and outputs the voltage signal and current signal to the signal input end of the electric energy metering unit 405;
the electric energy metering unit 405 calculates an electric energy signal using the received voltage signal and current signal; and the electric energy signal obtained by calculation is sent to the display screen 2 through the communication circuit 406; the electric energy metering device 4 is realized by adopting a chip with the model number of STM32F030C8T 6;
the display screen 2 is used for displaying the received electric energy signal;
the voltage and current signal conditioning circuit (404) comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, an AD sampling chip U1, a diode D1, a diode D2, a voltage-stabilizing diode U3, an optical coupling isolator U2, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, an electrolytic capacitor EC1, an electrolytic capacitor EC2, a voltage-stabilizing module U4 and a coil T1;
the AD sampling chip U1 is realized by a current mode boost converter with the model number of M1542, the voltage stabilizing module U4 is a chip with the model number of 78L05, a pin No. 1 of the AD sampling chip U1 is connected with one end of a resistor R7 through a capacitor C5, and the other end of the resistor R7 is a voltage signal input end of the voltage and current signal conditioning circuit 404;
the No. 2 pin of the AD sampling chip U1 is grounded;
the No. 3 pin of the AD sampling chip U1 is connected with one end of a resistor R4, and the other end of the resistor R4 is connected with one signal input end of a connecting electric energy metering unit (405);
the No. 4 pin of the AD sampling chip U1 is grounded;
the No. 5 pin of the AD sampling chip U1 is connected with the anode of a diode D2, and the cathode of the diode D2 is grounded through a resistor R2;
the negative electrode of the diode D2 is connected with one end of the capacitor C2, the other end of the capacitor C2 is connected with the dotted end of the primary side of the coil T1, and the unlike end of the primary side of the coil T1 is connected with the positive electrode of the D2; the other end of the capacitor C2 is also connected with a +5V power supply;
the dotted terminal of the secondary side of the coil T1 is connected with the unlike terminal of the secondary side of the coil T1 after sequentially passing through the capacitor C3, the capacitor C1 and the resistor R1;
the synonym terminal of the secondary side of the coil T1 is also connected with the anode of a diode D1, and the cathode of a diode D1 is connected with a 12V power supply;
the cathode of the diode D1 is connected to the other signal input end of the electric energy metering unit 405;
the same end of the secondary side of the coil T1 is also connected with the negative electrode of an electrolytic capacitor EC1, and the positive electrode of the electrolytic capacitor EC1 is connected with a 12V power supply; the negative electrode of the electrolytic capacitor EC1 is grounded;
a No. 6 pin of the AD sampling chip U1 is connected with a collector of the optocoupler isolator U2, and an emitter of the optocoupler isolator U2 is grounded; the positive electrode of the optocoupler isolator U2 is connected with a 12V power supply through a resistor R3; the positive electrode of the optocoupler isolator U2 is connected with one end of a capacitor C4 after sequentially passing through a resistor R6 and a resistor R5, and the other end of the capacitor C4 is connected with the negative electrode of the optocoupler isolator U2; one end of the capacitor C4 is connected with the control end of the voltage-stabilizing diode U3, the negative electrode of the voltage-stabilizing diode U3 is connected with the negative electrode of the opto-isolator U2, and the positive electrode of the voltage-stabilizing diode U3 is grounded; the control end of the voltage-stabilizing diode U3 is also grounded through a resistor R8;
the No. 7 pin of the AD sampling chip U1 is grounded;
the No. 8 pin of the AD sampling chip U1 is used as the current sampling signal input end of the voltage and current signal conditioning circuit 404 through the outgoing line of the capacitor C6;
no. 1 pin of the voltage stabilizing module U4 is connected with a 12V power supply, No. 2 pin of the voltage stabilizing module U4 is grounded, No. 3 pin of the voltage stabilizing module U4 is connected with a 5V power supply, No. 2 pin of the voltage stabilizing module U4 is connected with the cathode of the electrolytic capacitor EC2, and the anode of the electrolytic capacitor EC2 is connected with No. 3 pin of the voltage stabilizing module U4.
The large voltage signal input by the cable is stepped down step by step through the circuit for multiple voltage division to obtain a small signal, and finally the voltage of the small signal is input into the metering chip for analog-to-digital conversion.
The current sensor 401 described in this embodiment adopts a high-precision current sensor, and at the same time adopts a precision resistance voltage-dividing circuit 403, so that the design of high-precision large-voltage and large-current collection and integration of electric energy metering and charging functions of the charging gun is realized.
Further, the power supply circuit 6 is further included, and the power supply circuit 6 is used for supplying power to the operational amplification circuit 402, the voltage and current signal conditioning circuit 404, the electric energy metering unit 405 and the communication circuit 406.
Further, the operational amplifier circuit 402, the precision resistor voltage divider circuit 403, the voltage/current signal conditioning circuit 404, the electric energy metering unit 405, the communication circuit 406, and the power circuit 6 are integrated into a circuit module by using PCB technology.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (4)
1. A charging gun with a metering function comprises a charging gun body (1), wherein a cable (3) penetrates through the charging gun body (1), one end of the cable (3) is connected with a charging pile, and the other end of the cable supplies power to an electric automobile load through a charging head;
the electric energy meter is characterized by also comprising a display screen (2) and an electric energy metering device (4);
the display screen (2) is embedded and fixed on the shell of the charging gun body (1);
the electric energy metering device (4) comprises a current sensor (401), an operational amplifier circuit (402), a precision resistance voltage division circuit (403), a voltage and current signal conditioning circuit (404), an electric energy metering unit (405) and a communication circuit (406);
the current sensor (401) is used for collecting current signals on the cable (3) and outputting the collected current signals to a current signal input end of the operational amplification circuit (402);
the precise resistance voltage division circuit (403) is used for collecting a voltage signal on the cable (3) and outputting the collected voltage signal to a voltage signal input end of the voltage and current signal conditioning circuit (404);
the operational amplification circuit (402) amplifies the current signal and outputs the amplified current signal to the current sampling signal input end of the voltage and current signal conditioning circuit (404);
the voltage and current signal conditioning circuit (404) respectively performs analog-to-digital conversion on the received voltage signal and current signal and outputs the voltage signal and current signal to a signal input end of the electric energy metering unit (405);
the electric energy metering unit (405) calculates an electric energy signal by using the received voltage signal and current signal; the electric energy signal obtained by calculation is sent to the display screen (2) through the communication circuit (406);
the display screen (2) is used for displaying the received electric energy signal;
the voltage and current signal conditioning circuit (404) comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, an AD sampling chip U1, a diode D1, a diode D2, a voltage-stabilizing diode U3, an optical coupling isolator U2, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, an electrolytic capacitor EC1, an electrolytic capacitor EC2, a voltage-stabilizing module U4 and a coil T1;
the AD sampling chip U1 is realized by a current mode boost converter with the model number of M1542, the voltage stabilizing module U4 is a chip with the model number of 78L05, a pin No. 1 of the AD sampling chip U1 is connected with one end of a resistor R7 through a capacitor C5, and the other end of the resistor R7 is a voltage signal input end of a voltage and current signal conditioning circuit (404);
the No. 2 pin of the AD sampling chip U1 is grounded;
the No. 3 pin of the AD sampling chip U1 is connected with one end of a resistor R4, and the other end of the resistor R4 is connected with one signal input end of a connecting electric energy metering unit (405);
the No. 4 pin of the AD sampling chip U1 is grounded;
the No. 5 pin of the AD sampling chip U1 is connected with the anode of a diode D2, and the cathode of the diode D2 is grounded through a resistor R2;
the negative electrode of the diode D2 is connected with one end of the capacitor C2, the other end of the capacitor C2 is connected with the dotted end of the primary side of the coil T1, and the unlike end of the primary side of the coil T1 is connected with the positive electrode of the D2; the other end of the capacitor C2 is also connected with a +5V power supply;
the dotted terminal of the secondary side of the coil T1 is connected with the unlike terminal of the secondary side of the coil T1 after sequentially passing through the capacitor C3, the capacitor C1 and the resistor R1;
the synonym terminal of the secondary side of the coil T1 is also connected with the anode of a diode D1, and the cathode of a diode D1 is connected with a 12V power supply;
the cathode of the diode D1 is connected with the other signal input end of the electric energy metering unit (405);
the same end of the secondary side of the coil T1 is also connected with the negative electrode of an electrolytic capacitor EC1, and the positive electrode of the electrolytic capacitor EC1 is connected with a 12V power supply; the negative electrode of the electrolytic capacitor EC1 is grounded;
a No. 6 pin of the AD sampling chip U1 is connected with a collector of the optocoupler isolator U2, and an emitter of the optocoupler isolator U2 is grounded; the positive electrode of the optocoupler isolator U2 is connected with a 12V power supply through a resistor R3; the positive electrode of the optocoupler isolator U2 is connected with one end of a capacitor C4 after sequentially passing through a resistor R6 and a resistor R5, and the other end of the capacitor C4 is connected with the negative electrode of the optocoupler isolator U2; one end of the capacitor C4 is connected with the control end of the voltage-stabilizing diode U3, the negative electrode of the voltage-stabilizing diode U3 is connected with the negative electrode of the opto-isolator U2, and the positive electrode of the voltage-stabilizing diode U3 is grounded; the control end of the voltage-stabilizing diode U3 is also grounded through a resistor R8;
the No. 7 pin of the AD sampling chip U1 is grounded;
the No. 8 pin of the AD sampling chip U1 is used as the current sampling signal input end of the voltage and current signal conditioning circuit (404) through the outgoing line of the capacitor C6;
no. 1 pin of the voltage stabilizing module U4 is connected with a 12V power supply, No. 2 pin of the voltage stabilizing module U4 is grounded, No. 3 pin of the voltage stabilizing module U4 is connected with a 5V power supply, No. 2 pin of the voltage stabilizing module U4 is connected with the cathode of the electrolytic capacitor EC2, and the anode of the electrolytic capacitor EC2 is connected with No. 3 pin of the voltage stabilizing module U4.
2. The charging gun with the metering function according to claim 1, characterized by further comprising a power supply circuit (6), wherein the power supply circuit (6) is used for supplying power to the operational amplification circuit (402), the voltage and current signal conditioning circuit (404), the electric energy metering unit (405) and the communication circuit (406).
3. The charging gun with the metering function according to claim 1 or 2, characterized in that the operational amplifier circuit (402), the precision resistor voltage divider circuit (403), the voltage and current signal conditioning circuit (404), the electric energy metering unit (405), the communication circuit (406) and the power supply circuit (6) are integrated into one circuit module by adopting PCB technology.
4. Charging gun with metering function according to claim 1 or 2, characterized in that the electric energy metering device (4) is implemented by a chip of type STM32F030C8T 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020295811.XU CN212022359U (en) | 2020-03-11 | 2020-03-11 | Charging gun with metering function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020295811.XU CN212022359U (en) | 2020-03-11 | 2020-03-11 | Charging gun with metering function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110171319A (en) * | 2019-06-03 | 2019-08-27 | 国网四川省电力公司电力科学研究院 | A kind of three-phase standard AC charging pile that can be used for tracing to the source |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110171319A (en) * | 2019-06-03 | 2019-08-27 | 国网四川省电力公司电力科学研究院 | A kind of three-phase standard AC charging pile that can be used for tracing to the source |
| CN110171319B (en) * | 2019-06-03 | 2024-02-13 | 国网四川省电力公司电力科学研究院 | Three-phase standard alternating-current charging pile capable of being used for tracing |
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