CN115776166B - Circuit and method for confirming connection of electric ship and charging gun and electric ship - Google Patents
Circuit and method for confirming connection of electric ship and charging gun and electric ship Download PDFInfo
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- CN115776166B CN115776166B CN202310105854.5A CN202310105854A CN115776166B CN 115776166 B CN115776166 B CN 115776166B CN 202310105854 A CN202310105854 A CN 202310105854A CN 115776166 B CN115776166 B CN 115776166B
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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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Abstract
The present disclosure provides a circuit, method and electric ship for connection confirmation of electric ship and charging gun, which relates to the technical field of ship charging, comprising: the voltage sampling sub-circuit is used for collecting the sampling voltage of the voltage sampling point after the CC2 resistor connected into the charging gun; the upper limit voltage determining sub-circuit and the lower limit voltage determining sub-circuit are used for outputting corresponding limit voltage according to the sampling voltage and the current access resistance value of the variable resistor of the corresponding determining sub-circuit; the logic sub-circuit is used for determining the limit voltage output by the sub-circuit according to the upper limit voltage and the lower limit voltage and outputting logic judgment voltage representing a logic judgment result through high and low levels; the isolation display sub-circuit is used for using the logic judgment voltage to drive the optocoupler in the isolation display sub-circuit so as to ensure that whether the electric ship is successfully connected with the charging gun or not can be confirmed through the lighting condition of the optocoupler. The accuracy of confirming whether the charging gun is successfully connected or not is improved, and the suitability of a circuit is improved.
Description
Technical Field
The disclosure relates to the technical field of electric ship charging, in particular to a circuit and a method for confirming connection of an electric ship and a charging gun and the electric ship.
Background
When the battery of the electric ship is charged, in order to achieve the purpose of quick charging and shortening the charging time, the electric ship is usually charged by adopting a national standard direct current charging pile. In the charging connection, the charging gun connection needs to be confirmed, and the confirmation is completed through the CC2 resistor.
Generally, the resistance of CC2 is mainly determined according to the characteristics of the CC2 resistance, and when the resistance of CC2 is within the allowable range, the success of the connection of the charging gun can be confirmed. In the existing detection of the resistance value of the CC2 resistor, in the related scene, the ground of the CC2 detection circuit is connected with the 24V power supply ground for the ship, voltage is added to the CC2 resistor during detection, then the ground wire on the charging gun is connected with the 24V power supply ground to form a loop, and the CC2 resistance value is converted into a corresponding voltage value through circuit conversion, so that the actual resistance value of the CC2 is obtained. The non-isolated common ground method is commonly referred to as a detection method, i.e., the voltage signal of the CC2 resistor is isolated first, and then the actual resistance of the CC2 is obtained by adopting the non-isolated common ground method.
The method is to detect the voltage value corresponding to the CC2 resistor, calculate the actual resistance value of the CC2 resistor, convert the voltage into the resistor by means of a program, and have complex calculation process and lower accuracy of the calculated result.
Disclosure of Invention
In order to solve the technical problems that the calculation process is complex and the accuracy of the calculated result is low through program calculation in related scenes, the disclosure provides a circuit and a method for confirming connection between an electric ship and a charging gun and the electric ship.
According to a first aspect of embodiments of the present disclosure, there is provided a circuit for connection confirmation of an electric ship and a charging gun, the circuit for connection confirmation of an electric ship and a charging gun comprising:
a voltage sampling sub-circuit, an upper limit voltage determination sub-circuit and a lower limit voltage determination sub-circuit connected to the voltage sampling sub-circuit, a logic sub-circuit connected to the upper limit voltage determination sub-circuit and the lower limit voltage determination sub-circuit, respectively, and an isolation display sub-circuit connected to the logic sub-circuit;
the voltage sampling sub-circuit is configured with a voltage sampling point and is used for collecting sampling voltage of the voltage sampling point after being connected into the CC2 resistor of the charging gun;
The upper limit voltage determination sub-circuit and the lower limit voltage determination sub-circuit are used for outputting corresponding limit voltage according to the sampling voltage and the corresponding current access resistance value of the variable resistor of the determination sub-circuit, wherein the current access resistance value of the variable resistor in the upper limit voltage determination sub-circuit is determined according to the maximum resistance value of the CC2 resistor of the charging gun, and the current access resistance value of the variable resistor in the lower limit voltage determination sub-circuit is determined according to the minimum resistance value of the CC2 resistor of the charging gun;
the logic sub-circuit is used for determining the limit voltage output by the sub-circuit according to the upper limit voltage and the lower limit voltage and outputting logic judgment voltage representing a logic judgment result through high and low levels;
the isolation display sub-circuit is used for using the logic judgment voltage to drive the optocoupler in the isolation display sub-circuit, so that a user can confirm whether the electric ship is successfully connected to the charging gun or not through the luminous condition of the optocoupler.
In one embodiment, the logic sub-circuit comprises a resistor R10, a resistor R17, a resistor R7, a triode Q2 and a triode Q3;
Wherein a first end of the resistor R10 is configured to be connected to an output end of the lower limit voltage determination sub-circuit, a second end of the resistor R10 is connected to a base of the transistor Q2, a collector of the transistor Q2 is connected to a first end of the resistor R7, and a second end of the resistor R7 is connected to the power supply VCC;
a first end of the resistor R17 is configured to be connected with an output end of the upper limit voltage determination sub-circuit, a second end of the resistor R17 is connected with a base electrode of the triode Q3, a collector electrode of the triode Q3 is connected with an emitter electrode of the triode Q2, and the emitter electrode of the triode Q3 is grounded;
the collector of the triode Q2 is configured as the output end of the logic sub-circuit;
the logic sub-circuit is used for taking the limit voltage output by the upper limit voltage determination sub-circuit as the forward voltage of the triode Q2 to determine whether the triode Q2 is conducted or not; the method comprises the steps of,
taking the limit voltage output by the lower limit voltage determination sub-circuit as the forward voltage of the triode Q3, and determining whether the triode Q3 is conducted or not;
and outputting logic judgment voltage representing a logic judgment result through high and low levels from the output end of the logic sub-circuit according to the conduction condition of the triode Q2 and the conduction condition of the triode Q3.
In one embodiment, the lower limit voltage determination sub-circuit includes a variable resistor R4, a fixed resistor R12, a fixed resistor R10, and a comparator U2;
the first end of the variable resistor R4 is connected with a power supply, the second end of the variable resistor R4 is connected with the non-inverting input end of the comparator U2, the second end of the variable resistor R4 is connected with the first end of the fixed resistor R12, and the second end of the resistor R12 is grounded;
an inverting input terminal of the comparator U2 is configured to be connected to the voltage sampling point, a positive power supply of the comparator U2 is connected to a power supply, a negative power supply of the comparator U2 is connected to a ground, an output terminal of the comparator U2 is connected to a first terminal of the resistor R10, and a second terminal of the resistor R10 is configured to be an output terminal of the lower limit voltage determination sub-circuit and is connected to a first input terminal of the logic sub-circuit;
the lower limit voltage determination sub-circuit is used for determining the lower limit voltage of the CC2 resistor of the charging gun according to the sampling voltage and the current access resistance value of the variable resistor R4.
In one embodiment, the upper limit voltage determination sub-circuit includes a variable resistor R14, a fixed resistor R15, and a comparator U1;
The first end of the variable resistor R1 is connected with a power supply, the second end of the variable resistor R1 is connected with the inverting input end of the comparator U1, the second end of the variable resistor R1 is connected with the first end of the fixed resistor R15, and the second end of the fixed resistor R15 is grounded;
the non-inverting input end of the comparator U1 is configured to be connected with the voltage sampling point, and the output end of the comparator U1 is the output end of the upper limit voltage determination sub-circuit and is connected with the second input end of the logic sub-circuit;
the upper limit voltage determination sub-circuit is used for determining the upper limit voltage of the CC2 resistor of the charging gun according to the sampling voltage and the current access resistance value of the variable resistor R14.
In one embodiment, the voltage sampling sub-circuit comprises a magnetic bead L3, a magnetic bead L4, a resistor R8, a resistor R9, a resistor R3, a capacitor C6 and a capacitor C7;
the first end of the magnetic bead L3 is configured to be connected to the first end of the CC2 resistor of the charging gun, the second end of the magnetic bead L3 is connected to the first end of the resistor R8, the second end of the resistor R8 is connected to the first end of the resistor R9, the second end of the resistor R9 is connected to the first end of the resistor R3, the second end of the resistor R3 is connected to a power supply, the first end of the capacitor C6 is connected to a connection line between the second end of the resistor R8 and the first end of the resistor R9, the second end of the capacitor C6 is grounded, the voltage sampling point is configured between the resistor R9 and the resistor R3, the first end of the capacitor C7 is connected to a connection line between the second end of the resistor R9 and the voltage sampling point, and the second end of the capacitor C7 is grounded;
The first end of the magnetic bead L4 is configured to be connected with the second end of the CC2 resistor of the charging gun, and the second end of the magnetic bead L4 is grounded;
the magnetic bead L3, the resistor R8, the resistor R9, the capacitor C6 and the capacitor C7 in the voltage sampling sub-circuit form a filter loop, and the magnetic bead L4 is used for inhibiting interference from entering the voltage sampling sub-circuit from the grounding end.
In one embodiment, the isolation display subcircuit includes a resistor R11, a capacitor C8, an optocoupler U3, a resistor R6, and a resistor R5;
wherein, the first end of the resistor R11 is configured as an input end of the isolation display sub-circuit and is connected with an output end of the logic sub-circuit, the second end of the resistor R11 is connected with a cathode of a diode of the optocoupler U3, an anode of the diode of the optocoupler U3 is connected with the first end of the resistor R6, and the second end of the resistor R6 is connected with a power supply;
the collector of the transistor of the optocoupler U3 is connected with the first end of the resistor R5 and is used as the output end of the isolation display subcircuit after being connected, and the output end is used for outputting a level signal representing whether the charging gun is successfully connected or not, the second end of the resistor R5 is connected with a power supply, and the emitter of the transistor of the optocoupler U3 is grounded;
The first end of the capacitor C8 is connected to a connecting line between the second end of the resistor R11 and the cathode of the diode of the optical coupler U3, and the second end of the capacitor C8 is grounded;
under the condition that the charging gun is successfully connected, the optical coupler U3 emits light, a transistor of the optical coupler U3 is conducted, and an output end of the isolation display sub-circuit outputs a low-level signal representing the success of the charging gun connection;
and under the condition that the charging gun is not successfully connected, the optical coupler U3 does not emit light, a transistor of the optical coupler U3 is cut off, and the output end of the isolation display sub-circuit outputs a high-level signal representing that the charging gun is not successfully connected.
In one embodiment, the circuit for connection confirmation of the electric ship and the charging gun comprises:
an isolated power supply sub-circuit connected to the voltage sampling sub-circuit, the upper voltage determination sub-circuit, the lower voltage determination sub-circuit, the logic sub-circuit, and the isolated display sub-circuit;
the isolated power supply sub-circuit is used for performing double filtering of input voltage stabilizing filtering and output voltage flat wave filtering on the voltage provided by the power supply, and providing the filtered output voltage as working power to each sub-circuit.
In one embodiment, the isolated power supply sub-circuit comprises an isolated power supply module, an input end filter sub-circuit and an output end filter sub-circuit which are both connected with the isolated power supply module;
the input end filtering sub-circuit comprises a magnetic bead L2 and a capacitor C1, wherein a first end of the magnetic bead L2 is configured as a power input end of the isolation power sub-circuit and is used for being connected with a power supply, a second end of the magnetic bead L2 is connected with a first end of the capacitor C1, a second end of the capacitor is grounded, and a second end of the magnetic bead L2 is connected with a VIN end of the isolation power supply module;
the output terminal filtering sub-circuit comprises magnetic beads L1, a capacitor C2, a capacitor C3, a resistor R1 and a diode D1, wherein the first end of the magnetic beads L1 is connected with the output terminal +v0 of the isolation power supply module, the second end of the magnetic beads L1 is respectively connected with the first end of the capacitor C2, the first end of the capacitor C3, the first end of the resistor R1 and the cathode of the diode D1, and is used as the output terminal of the isolation power supply sub-circuit to be connected with the power supply terminals of the sub-circuits after being connected, and the second end of the capacitor C2, the second end of the capacitor C3, the second end of the resistor R1 and the anode of the diode D1 are all connected with the output terminal 0v of the isolation power supply sub-circuit and are grounded after being connected with the output terminal 0v of the isolation power supply sub-circuit;
The input end filtering sub-circuit is used for performing voltage stabilization filtering on the input voltage through a loop formed by the magnetic beads L2 and the capacitor C1;
the output end filtering sub-circuit is used for carrying out flat wave filtering on the output voltage through a loop formed by the magnetic bead L1, the capacitor C2 and the capacitor C3.
In one embodiment, the circuit for connection confirmation of the electric ship and the charging gun comprises: the conversion sub-circuit is connected with the isolation display sub-circuit;
the conversion sub-circuit is used for providing a level signal representing whether the electric ship is successfully connected with the charging gun or not for the battery management system of the electric ship according to the level signal output by the isolation display sub-circuit.
In one embodiment, the conversion sub-circuit comprises a resistor R2 and a triode Q1;
the first end of the resistor R2 is connected with a power supply, the second end of the resistor R2 is connected with the collector electrode of the triode Q1, the base electrode of the triode Q1 is connected with the output end of the isolation display subcircuit, and the triode Q1 is grounded;
under the condition that the output end of the isolation display sub-circuit outputs a high-level signal, the triode Q1 is conducted, and a high-level signal representing success of the electric ship to access the charging gun is provided for a battery management system of the electric ship;
And under the condition that the output end of the isolation display subcircuit outputs a low-level signal, the triode Q1 is cut off, and a low-level signal representing that the electric ship is unsuccessful to access the charging gun is provided for a battery management system of the electric ship.
According to a second aspect of embodiments of the present disclosure, there is provided a method for connection confirmation of an electric ship and a charging gun, the method being applied to the circuit for connection confirmation of an electric ship and a charging gun of any one of the first aspects;
the method comprises the following steps:
the voltage sampling sub-circuit collects the sampling voltage of the voltage sampling point after being connected into the CC2 resistor of the charging gun;
the upper limit voltage determining sub-circuit and the lower limit voltage determining sub-circuit output corresponding limit voltages according to the sampling voltage and the current access resistance value of the variable resistor of the corresponding determining sub-circuit, wherein the current access resistance value of the variable resistor in the upper limit voltage determining sub-circuit is determined according to the maximum resistance value of the CC2 resistor of the charging gun, and the current access resistance value of the variable resistor in the lower limit voltage determining sub-circuit is determined according to the minimum resistance value of the CC2 resistor of the charging gun;
the logic sub-circuit determines the limit voltage output by the sub-circuit according to the upper limit voltage and the lower limit voltage, and outputs logic judgment voltage representing a logic judgment result through high and low levels;
And the logic judgment voltage is used by the isolation display sub-circuit for driving the optocoupler in the isolation display sub-circuit, so that whether the electric ship is successfully connected into the charging gun can be confirmed through the lighting condition of the optocoupler.
According to a third aspect of embodiments of the present disclosure, there is provided an electric ship comprising the circuit for electric ship to charge gun connection validation of any one of the first aspects.
Through the technical scheme, at least the following beneficial effects can be achieved:
collecting the sampling voltage of a voltage sampling point after the CC2 resistor of the accessed charging gun through a voltage sampling sub-circuit; the upper limit voltage determining sub-circuit and the lower limit voltage determining sub-circuit output corresponding limit voltages according to the sampling voltage and the current access resistance value of the variable resistor of the corresponding determining sub-circuit; the logic sub-circuit determines the limit voltage output by the sub-circuit according to the upper limit voltage and the lower limit voltage, and outputs logic judgment voltage representing a logic judgment result through high and low levels; the logic judgment voltage is used by the isolation display sub-circuit to drive the optocoupler in the isolation display sub-circuit, so that whether the electric ship is connected with the charging gun successfully can be confirmed through the lighting condition of the optocoupler. The upper limit voltage determination sub-circuit and the lower limit voltage determination sub-circuit are used for determining the limiting voltage, the logic judgment voltage is determined based on the logic sub-circuit, whether the charging gun is successfully connected is further determined, the circuit is simple, complex program calculation is not needed, accuracy of determining whether the charging gun is successfully connected is improved, convenience of determining whether the charging gun is connected by a user according to the light emitting condition of the optical coupler is improved, the variable resistor in the upper limit voltage determination sub-circuit and the lower limit voltage determination sub-circuit is further improved, the connection resistance value can be adjusted according to the resistance value of the configuration CC2 resistor in the charging gun, accordingly, connection of any charging gun can be determined, and suitability of the circuit is improved.
Drawings
Fig. 1 is a circuit diagram of a circuit for connection confirmation of an electric ship and a charging gun according to one embodiment.
Fig. 2 is a flow chart of a method for connection confirmation of an electric ship to a charging gun according to one embodiment.
Detailed Description
In order that the above-recited objects, features and advantages of the present disclosure will become more readily apparent, a more particular description of the disclosure will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. The present disclosure may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the disclosure, and therefore the disclosure is not to be limited to the specific embodiments disclosed below.
The embodiment of the disclosure provides a circuit for connection confirmation of an electric ship and a charging gun, referring to fig. 1, the circuit for connection confirmation of an electric ship and a charging gun comprises:
a voltage sampling sub-circuit 101, an upper limit voltage determination sub-circuit 103 and a lower limit voltage determination sub-circuit 102 connected to the voltage sampling sub-circuit 101, a logic sub-circuit 104 connected to the upper limit voltage determination sub-circuit 103 and the lower limit voltage determination sub-circuit 102, respectively, and an isolation display sub-circuit 105 connected to the logic sub-circuit 104;
A voltage sampling point is configured in the voltage sampling sub-circuit 101, and the voltage sampling sub-circuit 101 is used for collecting a sampling voltage of the voltage sampling point after the CC2 resistor is connected to the charging gun;
the upper limit voltage determining sub-circuit 103 and the lower limit voltage determining sub-circuit 102 are configured to output a corresponding limit voltage according to the sampling voltage and a corresponding current resistance value of the variable resistor of the determining sub-circuit, where the current resistance value of the variable resistor in the upper limit voltage determining sub-circuit 103 is determined according to a maximum resistance value of the CC2 resistor of the charging gun, and the current resistance value of the variable resistor in the lower limit voltage determining sub-circuit 102 is determined according to a minimum resistance value of the CC2 resistor of the charging gun;
the logic sub-circuit 104 is configured to output a logic determination voltage representing a logic determination result by a high-low level according to the limit voltage output by the upper limit voltage determination sub-circuit 103 and the limit voltage output by the lower limit voltage determination sub-circuit 102;
the isolation display sub-circuit 105 is configured to use the logic determination voltage to drive the optocoupler in the isolation display sub-circuit, so that a user can confirm whether the electric ship is successfully connected to the charging gun through the lighting condition of the optocoupler.
The circuit collects the sampling voltage of the voltage sampling point after the CC2 resistor of the charging gun is connected through the voltage sampling sub-circuit; the upper limit voltage determining sub-circuit and the lower limit voltage determining sub-circuit output corresponding limit voltages according to the sampling voltage and the current access resistance value of the variable resistor of the corresponding determining sub-circuit; the logic sub-circuit determines the limit voltage output by the sub-circuit according to the upper limit voltage and the lower limit voltage, and outputs logic judgment voltage representing a logic judgment result through high and low levels; the logic judgment voltage is used by the isolation display sub-circuit to drive the optocoupler in the isolation display sub-circuit, so that whether the electric ship is connected with the charging gun successfully can be confirmed through the lighting condition of the optocoupler. The upper limit voltage determination sub-circuit and the lower limit voltage determination sub-circuit are used for determining the limiting voltage, the logic judgment voltage is determined based on the logic sub-circuit, whether the charging gun is successfully connected is further determined, the circuit is simple, complex program calculation is not needed, accuracy of determining whether the charging gun is successfully connected is improved, convenience of determining whether the charging gun is connected by a user according to the light emitting condition of the optical coupler is improved, the variable resistor in the upper limit voltage determination sub-circuit and the lower limit voltage determination sub-circuit is further improved, the connection resistance value can be adjusted according to the resistance value of the configuration CC2 resistor in the charging gun, accordingly, connection of any charging gun can be determined, and suitability of the circuit is improved.
In one embodiment, referring to fig. 1, the logic sub-circuit 104 includes a resistor R10, a resistor R17, a resistor R7, a transistor Q2, and a transistor Q3;
wherein a first terminal of the resistor R10 is configured to be connected to an output terminal of the lower limit voltage determination sub-circuit 102, a second terminal of the resistor R10 is connected to a base of the transistor Q2, a collector of the transistor Q2 is connected to a first terminal of the resistor R7, and a second terminal of the resistor R7 is connected to the power supply VCC;
a first end of the resistor R17 is configured to be connected to an output end of the upper limit voltage determination sub-circuit 103, a second end of the resistor R17 is connected to a base of the triode Q3, a collector of the triode Q3 is connected to an emitter of the triode Q2, and an emitter of the triode Q3 is grounded;
the collector of the transistor Q2 is configured as the output of the logic sub-circuit 104;
the logic sub-circuit 104 is configured to determine whether the transistor Q2 is turned on by using the limit voltage output by the upper limit voltage determination sub-circuit 103 as the forward voltage of the transistor Q2; the method comprises the steps of,
determining whether the triode Q3 is conducted by taking the limit voltage output by the lower limit voltage determination sub-circuit 102 as the forward voltage of the triode Q3;
According to the conduction condition of the transistor Q2 and the conduction condition of the transistor Q3, a logic judgment voltage representing a logic judgment result by a high-low level is output from the output end of the logic sub-circuit 104.
In the embodiment of the disclosure, R10 and R17 in the logic sub-circuit 104 play a role of current-limiting protection triode, Q2 and Q3 are PNP triode, and form an or gate logic circuit, R7 plays a role of current-limiting protection power supply, and V5 is a logic judgment output result. When the upper and lower limit determination sub-circuits output the result to the logic judgment circuit, the logic judgment rule is:
(1) when the resistance of CC2 is within the range of 0.8K omega-RCC 2-1.2K omega, when V3 = 0V, Q2 is conducted, V4 = 0V, Q3 is conducted, VCC, R7, Q2, Q3 and GND form a loop, and the output voltage V5 = 0V (low level);
(2) when RCC2 is less than 0.8kΩ, v3=1v, q2 is not turned on, v4=0v, q3 is turned on, VCC, R7, Q2, Q3, GND cannot form a loop, and the output voltage v5=5v (high level);
(3) when RCC2 > 1.2kΩ, v3=0v, q2 is conductive, v4=5v, and q3 is nonconductive, VCC, R7, Q2, Q3, GND cannot form a loop, and the output voltage v5=5v (high level).
The judging result of the CC2 resistor can be obtained through an OR gate logic judging circuit, when the range is met, 0V voltage is output, when the range is not met, 5V voltage is output, namely when the CC2 resistor meets the requirement that RCC2 is less than or equal to 0.8K omega and less than or equal to 1.2K omega, the V5 output voltage is 0V (low level).
In one embodiment, referring to fig. 1, the lower limit voltage determining sub-circuit 102 includes a variable resistor R4, a fixed resistor R12, a fixed resistor R10, and a comparator U2;
the first end of the variable resistor R4 is connected with a power supply, the second end of the variable resistor R4 is connected with the non-inverting input end of the comparator U2, the second end of the variable resistor R4 is connected with the first end of the fixed resistor R12, and the second end of the resistor R12 is grounded;
an inverting input of the comparator U2 is configured to be connected to the voltage sampling point, a positive power supply of the comparator U2 is connected to a power supply, a negative power supply of the comparator U2 is connected to a ground, an output of the comparator U2 is connected to a first end of the resistor R10, and a second end of the resistor R10 is configured to be an output of the lower limit voltage determination sub-circuit 102 and is connected to a first input of the logic sub-circuit 104;
the lower limit voltage determining sub-circuit 102 is configured to determine a lower limit voltage of the CC2 resistor of the charging gun according to the sampling voltage and a current access resistance value of the variable resistor R4.
Referring to fig. 1, the lower limit voltage determination sub-circuit 102 also includes a capacitor C5.
In the embodiment of the disclosure, the R12 resistor is a resistor specifically set for the lower limit resistance parameter of the CC2 resistor, is matched with the R4 at the upper end, and is used for dividing the voltage of the 5V power supply to determine whether the CC2 resistor exceeds the lower limit of the specified range. Wherein r4=1kΩ, r13=1kΩ, U2 is TLV2333IDR, c5=100 nF.
The lower limit voltage is calculated as:
V1=[(R12+R13)/(R12+R13+R4)]*5=[(12K+1K)/(12K+1K+12K)]*5=2.6V。
the lower limit setting voltage V1 is input to the 3 rd pin of the positive input end of the operational amplifier U2 as a lower limit reference voltage. The sampling voltage VCC2 is input to the 2 nd pin of the negative input end of the operational amplifier U2, and when VCC2 is more than or equal to 2.6V (namely RCC2 is more than or equal to 0.8KΩ), the operational amplifier U2 outputs V3=0V (low level) by utilizing the characteristic of a comparator of the operational amplifier; when VCC2 < 2.6V (i.e., RCC2 < 0.8kΩ), the op-amp U2 outputs v3=5v (high level).
In one embodiment, referring to fig. 1, the upper limit voltage determining sub-circuit 103 includes a variable resistor R14, a fixed resistor R15, and a comparator U1;
the first end of the variable resistor R1 is connected with a power supply, the second end of the variable resistor R1 is connected with the inverting input end of the comparator U1, the second end of the variable resistor R1 is connected with the first end of the fixed resistor R15, and the second end of the fixed resistor R15 is grounded;
The non-inverting input terminal of the comparator U1 is configured to be connected to the voltage sampling point, and the output terminal of the comparator U1 is the output terminal of the upper limit voltage determination sub-circuit 103 and is connected to the second input terminal of the logic sub-circuit 104;
the upper limit voltage determining sub-circuit 103 is configured to determine an upper limit voltage of the CC2 resistor of the charging gun according to the sampling voltage and a current access resistance value of the variable resistor R14.
The upper limit voltage determination sub-circuit 103 has a resistor, which is specifically set so that R15 is an upper limit resistance parameter of the CC2 resistor, and is matched with R14 at the upper end, and divides the 5V power supply to determine whether the CC2 resistor exceeds the upper limit of the predetermined range.
The upper limit set voltage is calculated as:
V2=[(R15+R16)/(R14+R15+R6)]*VCC=[(12K+3.24K)/(12K+3.24K+12K)]*5V=2.8V。
the upper limit setting voltage V2 is input to the 6 th pin of the negative input end of the operational amplifier and is used as an upper limit reference voltage. The sampling voltage VCC2 is input to the 5 th pin of the positive input end of the operational amplifier U2.2, and when VCC2 is less than or equal to 2.8V (namely RCC2 is less than or equal to 1.2KΩ), the operational amplifier U1 outputs V4=0V (low level) by utilizing the characteristic comparator characteristic of the operational amplifier; when VCC2 > 2.8V (i.e., RCC2 > 1.2kΩ), the op-amp U1 outputs a voltage v4=5v (high level).
In one embodiment, referring to fig. 1, the voltage sampling sub-circuit 101 includes a magnetic bead L3, a magnetic bead L4, a resistor R8, a resistor R9, a resistor R3, a capacitor C6, and a capacitor C7;
The first end of the magnetic bead L3 is configured to be connected to the first end of the CC2 resistor of the charging gun, the second end of the magnetic bead L3 is connected to the first end of the resistor R8, the second end of the resistor R8 is connected to the first end of the resistor R9, the second end of the resistor R9 is connected to the first end of the resistor R3, the second end of the resistor R3 is connected to a power supply, the first end of the capacitor C6 is connected to a connection line between the second end of the resistor R8 and the first end of the resistor R9, the second end of the capacitor C6 is grounded, the voltage sampling point is configured between the resistor R9 and the resistor R3, the first end of the capacitor C7 is connected to a connection line between the second end of the resistor R9 and the voltage sampling point, and the second end of the capacitor C7 is grounded;
the first end of the magnetic bead L4 is configured to be connected with the second end of the CC2 resistor of the charging gun, and the second end of the magnetic bead L4 is grounded;
the magnetic bead L3, the resistor R8, the resistor R9, the capacitor C6 and the capacitor C7 in the voltage sampling sub-circuit 101 form a filter loop, and the magnetic bead L4 is used for inhibiting interference from entering the voltage sampling sub-circuit 101 from a grounding end.
In the embodiment of the disclosure, resistors RCC2, R8, R9, R3, magnetic beads L3, L4, and capacitors C6, C7 form a CC2 resistor sampling circuit. The RCC2 is the internal CC2 resistor of the charging gun end, the nominal resistance is 1KΩ, the allowable error is +/-20%, and the allowable range is 0.8K-1.2 KΩ. L3, R8, C6, R9 and C7 form an input end two-stage RC filter circuit, and the negative end L4 of the CC2 resistor plays a role in inhibiting interference from entering a next-stage circuit from the negative end. Since the resistances of the magnetic beads L3 and L4 are oΩ, a voltage dividing circuit is formed by RCC2, R8, R9, R3, where r8=r9=680 Ω, c6= =c7=2.2uf, r3=2kΩ, and the voltage is calculated as follows;
When RCC2 of the charging gun is not connected, VCC2 = 5V;
when the RCC2 of the charging gun is accessed,
VCC2=[(RCC2+R8+R9)/(RCC2+R8+R9+R3)]*5=(RCC2+1.36KΩ)*5V/(RCC2+3.36KΩ)；
if rcc2=0.8kΩ,
VCC2=(0.8KΩ+1.36KΩ)*5V/(0.8KΩ+3.36KΩ)=2.6V；
if rcc2=1.2 kΩ,
VCC2=(1.2KΩ+1.36KΩ)*5V/(1.2KΩ+3.36KΩ)=2.8V。
the upper limit voltage 2.8V and the lower limit voltage 2.6V of the CC2 resistor can be obtained.
In one embodiment, referring to fig. 1, the isolation display subcircuit 105 includes a resistor R11, a capacitor C8, an optocoupler U3, a resistor R6, and a resistor R5;
wherein a first end of the resistor R11 is configured as an input end of the isolation display sub-circuit 105, and is connected to an output end of the logic sub-circuit 104, a second end of the resistor R11 is connected to a cathode of a diode of the optocoupler U3, an anode of the diode of the optocoupler U3 is connected to a first end of the resistor R6, and a second end of the resistor R6 is connected to a power supply;
the collector of the transistor of the optocoupler U3 is connected to the first end of the resistor R5, and is used as the output end of the isolation display sub-circuit 105 after being connected, for outputting a level signal indicating whether the charging gun is successfully connected, the second end of the resistor R5 is connected to a power supply, and the emitter of the transistor of the optocoupler U3 is grounded;
the first end of the capacitor C8 is connected to a connecting line between the second end of the resistor R11 and the cathode of the diode of the optical coupler U3, and the second end of the capacitor C8 is grounded;
Under the condition that the charging gun is successfully connected, the optical coupler U3 emits light, a transistor of the optical coupler U3 is conducted, and the output end of the isolation display sub-circuit 105 outputs a low-level signal representing the success of the charging gun connection;
in the case that the charging gun is not successfully connected, the optocoupler U3 does not emit light, and the transistor of the optocoupler U3 is turned off, and the output end of the isolation display sub-circuit 105 outputs a high-level signal indicating that the charging gun is not successfully connected.
The logic sub-circuit outputs voltage V5 as an input driving signal enough for the isolation tube, when V5 = 0V, the diode at the input end of the optocoupler works to emit light, the transistors or MOS tubes at the 3 and 4 pins of the driving output end are conducted, and the V6 = 0V (low level) of the output end of the optocoupler is isolated; when v5=5v, the optocoupler input diode does not work, stops emitting light, the output transistor or MOS transistor is turned on and not turned on, and the output voltage v6=5v (high level). The input signal is transmitted to the next stage, and meanwhile, signal isolation is also achieved physically, so that an interference source is prevented from being transmitted to the next stage circuit. Namely, when the CC2 resistance meets the requirement that RCC2 is smaller than or equal to 0.8KΩ and smaller than or equal to 1.2K Ω, the V6 output voltage is 0V (low level).
In one embodiment, the circuit for connection confirmation of the electric ship and the charging gun comprises:
an isolated power supply sub-circuit connected to the voltage sampling sub-circuit 101, the upper limit voltage determination sub-circuit 103, the lower limit voltage determination sub-circuit 102, the logic sub-circuit 104, and the isolated display sub-circuit 105;
the isolated power supply sub-circuit is used for performing double filtering of input voltage stabilizing filtering and output voltage flat wave filtering on the voltage provided by the power supply, and providing the filtered output voltage as working power to each sub-circuit.
In one embodiment, the isolated power supply sub-circuit comprises an isolated power supply module U1, and an input end filtering sub-circuit and an output end filtering sub-circuit which are both connected with the isolated power supply module U1;
the input end filtering sub-circuit comprises a magnetic bead L2 and a capacitor C1, wherein a first end of the magnetic bead L2 is configured as a power input end of the isolation power sub-circuit and is used for being connected with a power supply, a second end of the magnetic bead L2 is connected with the first end of the capacitor C1, the second end of the capacitor is commonly grounded with a GND pin of the isolation power module, and a second end of the magnetic bead L2 is connected with a VIN end of the isolation power module;
The output terminal filtering sub-circuit comprises magnetic beads L1, a capacitor C2, a capacitor C3, a resistor R1 and a diode D1, wherein the first end of the magnetic beads L1 is connected with the output terminal +v0 of the isolation power supply module, the second end of the magnetic beads L1 is respectively connected with the first end of the capacitor C2, the first end of the capacitor C3, the first end of the resistor R1 and the cathode of the diode D1, and is used as the output terminal of the isolation power supply sub-circuit to be connected with the power supply terminals of the sub-circuits after being connected, and the second end of the capacitor C2, the second end of the capacitor C3, the second end of the resistor R1 and the anode of the diode D1 are all connected with the output terminal 0v of the isolation power supply sub-circuit and are grounded after being connected with the output terminal 0v of the isolation power supply sub-circuit;
the input end filtering sub-circuit is used for performing voltage stabilization filtering on the input voltage through a loop formed by the magnetic beads L2 and the capacitor C1;
the output end filtering sub-circuit is used for carrying out flat wave filtering on the output voltage through a loop formed by the magnetic bead L1, the capacitor C2 and the capacitor C3.
In one embodiment, the isolated power supply sub-circuit includes a capacitor C4, where the capacitor C4 is 1nF, and a first end of the capacitor C4 is connected to a connection line between the capacitor C1 and a GND pin of the isolated power supply module.
U1 is 5V isolation power module, VCC is the output power, and VCC is used for providing the operating power for the circuit that is used for electric ship and rifle connection to confirm. The magnetic bead L2 and the capacitor C1 in the circuit form an input end LC filter circuit, so that the effect of stabilizing input voltage is achieved. The output end L1, the C2 and the C3 form an LC filter output circuit, a smoothing effect is achieved on output voltage, R1 is a preset load of the output end, the output effect of the U1 isolated power supply is stabilized, and finally the D1 voltage stabilizing tube further filters the output voltage, so that the output voltage is more stable.
In one embodiment, since the output voltage of the isolation display sub-circuit is 0V, it is relatively easy to receive external interference and cause misjudgment, and therefore, it is necessary to perform a level conversion from a low level to a high level, and therefore, the circuit for confirming connection between the electric ship and the charging gun comprises: a conversion sub-circuit connected to the isolation display sub-circuit 105;
the conversion sub-circuit is used for providing a level signal representing whether the electric ship is successfully connected with the charging gun or not to the battery management system of the electric ship according to the level signal output by the isolation display sub-circuit 105.
In one embodiment, the conversion sub-circuit comprises a resistor R2 and a triode Q1;
the first end of the resistor R2 is connected with a power supply, the second end of the resistor R2 is connected with the collector electrode of the triode Q1, the base electrode of the triode Q1 is connected with the output end of the isolation display subcircuit 105, and the triode Q1 is grounded;
wherein, in the case that the output end of the isolation display sub-circuit 105 outputs a high level signal, the triode Q1 is turned on to provide a high level signal representing success of the electric ship accessing the charging gun for the battery management system of the electric ship;
in the case where the output of the isolation display subcircuit 105 outputs a low level signal, the transistor Q1 is turned off, providing a low level signal to the battery management system of the electric ship that characterizes the failure of the electric ship to access the charging gun.
When v6=0v, transistor Q1 is non-conductive, providing an output voltage to the battery management system of the electric ship that characterizes the electric ship's unsuccessful access to the charging gun as 5V (high level), and when v6=5v, transistor Q1 is conductive, providing an output voltage to the battery management system of the electric ship that characterizes the electric ship's unsuccessful access to the charging gun as 0V (low level).
Finally, the MCU of the battery management system reads the output voltage, and the output voltage is only 5V (high level) and 0V (low level) to be distinguished, so that a special ADC pin is not needed, only a general purpose GPIO port is needed, and meanwhile, the result of CC2 resistance can be obtained by only judging the signal in the process without more conversion steps. When the MCU reads the high level, the CC2 resistor is judged to be connected in place, namely the charging gun is connected in place. If the MCU reads the low level, judging that the CC2 resistor is not available, namely the charging gun is not connected or is connected unreliably.
The embodiment of the present disclosure also provides a method for connection confirmation of an electric ship and a charging gun, which is applied to the circuit for connection confirmation of an electric ship and a charging gun according to any one of the foregoing embodiments;
referring to fig. 2, the method includes:
in step S21, the voltage sampling sub-circuit collects the sampling voltage of the voltage sampling point after the CC2 resistor connected to the charging gun;
in step S22, the upper limit voltage determining sub-circuit and the lower limit voltage determining sub-circuit output corresponding limit voltages according to the sampling voltage and the corresponding current access resistance value of the variable resistor of the determining sub-circuit, wherein the current access resistance value of the variable resistor in the upper limit voltage determining sub-circuit is determined according to the maximum resistance value of the CC2 resistor of the charging gun, and the current access resistance value of the variable resistor in the lower limit voltage determining sub-circuit is determined according to the minimum resistance value of the CC2 resistor of the charging gun;
In step S23, the logic sub-circuit determines the limit voltage output by the sub-circuit according to the upper limit voltage and the lower limit voltage, and outputs a logic judgment voltage representing a logic judgment result by a high-low level;
in step S24, the isolation display sub-circuit uses the logic determination voltage to drive the optocoupler in the isolation display sub-circuit, so that whether the electric ship is successfully connected to the charging gun can be confirmed by the lighting condition of the optocoupler.
Embodiments of the present disclosure also provide an electric vessel comprising a circuit for connection confirmation of an electric vessel with a charging gun as in any of the previous embodiments.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples represent only a few embodiments of the present disclosure, which are described in more detail and detail, but are not to be construed as limiting the scope of the disclosure. It should be noted that variations and modifications can be made by those skilled in the art without departing from the spirit of the disclosure, which are within the scope of the disclosure. Accordingly, the scope of protection of the present disclosure should be determined by the following claims.
Claims (11)
1. A circuit for connection verification of an electric ship and a charging gun, the circuit for connection verification of an electric ship and a charging gun comprising:
a voltage sampling sub-circuit, an upper limit voltage determination sub-circuit and a lower limit voltage determination sub-circuit connected to the voltage sampling sub-circuit, a logic sub-circuit connected to the upper limit voltage determination sub-circuit and the lower limit voltage determination sub-circuit, respectively, and an isolation display sub-circuit connected to the logic sub-circuit;
the voltage sampling sub-circuit is configured with a voltage sampling point and is used for collecting sampling voltage of the voltage sampling point after being connected into the CC2 resistor of the charging gun;
the upper limit voltage determination sub-circuit and the lower limit voltage determination sub-circuit are used for outputting corresponding limit voltage according to the sampling voltage and the corresponding current access resistance value of the variable resistor of the determination sub-circuit, wherein the current access resistance value of the variable resistor in the upper limit voltage determination sub-circuit is determined according to the maximum resistance value of the CC2 resistor of the charging gun, and the current access resistance value of the variable resistor in the lower limit voltage determination sub-circuit is determined according to the minimum resistance value of the CC2 resistor of the charging gun;
The logic sub-circuit is used for determining the limit voltage output by the sub-circuit according to the upper limit voltage and the lower limit voltage and outputting logic judgment voltage representing a logic judgment result through high and low levels;
the isolation display sub-circuit is used for using the logic judgment voltage to drive an optical coupler in the isolation display sub-circuit so that a user can confirm whether the electric ship is successfully connected to the charging gun or not through the luminous condition of the optical coupler;
the logic sub-circuit comprises a resistor R10, a resistor R17, a resistor R7, a triode Q2 and a triode Q3;
wherein a first end of the resistor R10 is configured to be connected with an output end of the lower limit voltage determination sub-circuit, a second end of the resistor R10 is connected with a base electrode of the triode Q2, an emitter electrode of the triode Q2 is connected with a first end of the resistor R7, and a second end of the resistor R7 is connected with a power supply VCC;
a first end of the resistor R17 is configured to be connected with an output end of the upper limit voltage determination sub-circuit, a second end of the resistor R17 is connected with a base electrode of the triode Q3, an emitter electrode of the triode Q3 is connected with a collector electrode of the triode Q2, and the collector electrode of the triode Q3 is grounded;
The emitter of the triode Q2 is configured as the output end of the logic sub-circuit;
the logic sub-circuit is used for taking the limit voltage output by the lower limit voltage determination sub-circuit as the forward voltage of the triode Q2 to determine whether the triode Q2 is conducted or not; the method comprises the steps of,
taking the limit voltage output by the upper limit voltage determination sub-circuit as the forward voltage of the triode Q3, and determining whether the triode Q3 is conducted or not;
and outputting logic judgment voltage representing a logic judgment result through high and low levels from the output end of the logic sub-circuit according to the conduction condition of the triode Q2 and the conduction condition of the triode Q3.
2. The circuit for connection confirmation of an electric ship and a charging gun according to claim 1, wherein the lower limit voltage determination sub-circuit includes a variable resistor R4, a fixed resistor R12, and a comparator U2;
the first end of the variable resistor R4 is connected with a power supply, the second end of the variable resistor R4 is connected with the non-inverting input end of the comparator U2, the second end of the variable resistor R4 is connected with the first end of the fixed resistor R12, and the second end of the resistor R12 is grounded;
the inverting input end of the comparator U2 is configured to be connected with the voltage sampling point, the positive power supply of the comparator U2 is connected with a power supply, the negative power supply of the comparator U2 is grounded, and the output end of the comparator U2 is connected with the first end of the resistor R10;
The lower limit voltage determination sub-circuit is used for determining the lower limit voltage of the CC2 resistor of the charging gun according to the sampling voltage and the current access resistance value of the variable resistor R4.
3. The circuit for connection confirmation of an electric ship and a charging gun according to claim 1, wherein the upper limit voltage determination sub-circuit includes a variable resistor R14, a fixed resistor R15, and a comparator U1;
the first end of the variable resistor R14 is connected with a power supply, the second end of the variable resistor R14 is connected with the inverting input end of the comparator U1, the second end of the variable resistor R14 is connected with the first end of the fixed resistor R15, and the second end of the fixed resistor R15 is grounded;
the non-inverting input end of the comparator U1 is configured to be connected with the voltage sampling point, and the output end of the comparator U1 is the output end of the upper limit voltage determination sub-circuit and is connected with the second input end of the logic sub-circuit;
the upper limit voltage determination sub-circuit is used for determining the upper limit voltage of the CC2 resistor of the charging gun according to the sampling voltage and the current access resistance value of the variable resistor R14.
4. The circuit for connection confirmation of an electric ship and a charging gun according to claim 1, wherein the voltage sampling sub-circuit comprises a magnetic bead L3, a magnetic bead L4, a resistor R8, a resistor R9, a resistor R3, a capacitor C6 and a capacitor C7;
The first end of the magnetic bead L3 is configured to be connected to the first end of the CC2 resistor of the charging gun, the second end of the magnetic bead L3 is connected to the first end of the resistor R8, the second end of the resistor R8 is connected to the first end of the resistor R9, the second end of the resistor R9 is connected to the first end of the resistor R3, the second end of the resistor R3 is connected to a power supply, the first end of the capacitor C6 is connected to a connection line between the second end of the resistor R8 and the first end of the resistor R9, the second end of the capacitor C6 is grounded, the voltage sampling point is configured between the resistor R9 and the resistor R3, the first end of the capacitor C7 is connected to a connection line between the second end of the resistor R9 and the voltage sampling point, and the second end of the capacitor C7 is grounded;
the first end of the magnetic bead L4 is configured to be connected with the second end of the CC2 resistor of the charging gun, and the second end of the magnetic bead L4 is grounded;
the magnetic bead L3, the resistor R8, the resistor R9, the capacitor C6 and the capacitor C7 in the voltage sampling sub-circuit form a filter loop, and the magnetic bead L4 is used for inhibiting interference from entering the voltage sampling sub-circuit from the grounding end.
5. The circuit for connection verification of an electric vessel and a charging gun according to claim 1, wherein the isolation display sub-circuit comprises a resistor R11, a capacitor C8, an optocoupler U3, a resistor R6 and a resistor R5;
Wherein, the first end of the resistor R11 is configured as an input end of the isolation display sub-circuit and is connected with an output end of the logic sub-circuit, the second end of the resistor R11 is connected with a cathode of a diode of the optocoupler U3, an anode of the diode of the optocoupler U3 is connected with the first end of the resistor R6, and the second end of the resistor R6 is connected with a power supply;
the collector of the transistor of the optocoupler U3 is connected with the first end of the resistor R5 and is used as the output end of the isolation display subcircuit after being connected, and the output end is used for outputting a level signal representing whether the charging gun is successfully connected or not, the second end of the resistor R5 is connected with a power supply, and the emitter of the transistor of the optocoupler U3 is grounded;
the first end of the capacitor C8 is connected to a connecting line between the second end of the resistor R11 and the cathode of the diode of the optical coupler U3, and the second end of the capacitor C8 is grounded;
under the condition that the charging gun is successfully connected, the optical coupler U3 emits light, a transistor of the optical coupler U3 is conducted, and an output end of the isolation display sub-circuit outputs a low-level signal representing the success of the charging gun connection;
and under the condition that the charging gun is not successfully connected, the optical coupler U3 does not emit light, a transistor of the optical coupler U3 is cut off, and the output end of the isolation display sub-circuit outputs a high-level signal representing that the charging gun is not successfully connected.
6. The circuit for connection confirmation of an electric ship and a charging gun according to any one of claims 1 to 5, characterized in that the circuit for connection confirmation of an electric ship and a charging gun comprises:
an isolated power supply sub-circuit connected to the voltage sampling sub-circuit, the upper voltage determination sub-circuit, the lower voltage determination sub-circuit, the logic sub-circuit, and the isolated display sub-circuit;
the isolated power supply sub-circuit is used for performing double filtering of input voltage stabilizing filtering and output voltage flat wave filtering on the voltage provided by the power supply, and providing the filtered output voltage as working power to each sub-circuit.
7. The circuit for connection verification of an electric vessel and a charging gun of claim 6, wherein the isolated power supply sub-circuit comprises an isolated power supply module, an input filter sub-circuit and an output filter sub-circuit both connected to the isolated power supply module;
the input end filtering sub-circuit comprises a magnetic bead L2 and a capacitor C1, wherein a first end of the magnetic bead L2 is configured as a power input end of the isolation power sub-circuit and is used for being connected with a power supply, a second end of the magnetic bead L2 is connected with a first end of the capacitor C1, a second end of the capacitor is grounded, and a second end of the magnetic bead L2 is connected with a VIN end of the isolation power supply module;
The output terminal filtering sub-circuit comprises magnetic beads L1, a capacitor C2, a capacitor C3, a resistor R1 and a diode D1, wherein the first end of the magnetic beads L1 is connected with the output terminal +v0 of the isolation power supply module, the second end of the magnetic beads L1 is respectively connected with the first end of the capacitor C2, the first end of the capacitor C3, the first end of the resistor R1 and the cathode of the diode D1, and is used as the output terminal of the isolation power supply sub-circuit to be connected with the power supply terminals of the sub-circuits after being connected, and the second end of the capacitor C2, the second end of the capacitor C3, the second end of the resistor R1 and the anode of the diode D1 are all connected with the output terminal 0v of the isolation power supply sub-circuit and are grounded after being connected with the output terminal 0v of the isolation power supply sub-circuit;
the input end filtering sub-circuit is used for performing voltage stabilization filtering on the input voltage through a loop formed by the magnetic beads L2 and the capacitor C1;
the output end filtering sub-circuit is used for carrying out flat wave filtering on the output voltage through a loop formed by the magnetic bead L1, the capacitor C2 and the capacitor C3.
8. The circuit for connection confirmation of an electric ship and a charging gun according to any one of claims 1 to 5, characterized in that the circuit for connection confirmation of an electric ship and a charging gun comprises: the conversion sub-circuit is connected with the isolation display sub-circuit;
The conversion sub-circuit is used for providing a level signal representing whether the electric ship is successfully connected with the charging gun or not for the battery management system of the electric ship according to the level signal output by the isolation display sub-circuit.
9. The circuit of claim 8, wherein the conversion sub-circuit comprises a resistor R2 and a transistor Q1;
the first end of the resistor R2 is connected with a power supply, the second end of the resistor R2 is connected with the collector electrode of the triode Q1, the base electrode of the triode Q1 is connected with the output end of the isolation display sub-circuit, and the collector electrode of the triode Q1 is grounded;
under the condition that the output end of the isolation display sub-circuit outputs a high-level signal, the triode Q1 is conducted, and a high-level signal representing success of the electric ship to access the charging gun is provided for a battery management system of the electric ship;
and under the condition that the output end of the isolation display subcircuit outputs a low-level signal, the triode Q1 is cut off, and a low-level signal representing that the electric ship is unsuccessful to access the charging gun is provided for a battery management system of the electric ship.
10. A method for connection confirmation of an electric ship and a charging gun, characterized in that the method is applied to the circuit for connection confirmation of an electric ship and a charging gun according to any one of claims 1 to 9;
The method comprises the following steps:
the voltage sampling sub-circuit collects the sampling voltage of the voltage sampling point after being connected into the CC2 resistor of the charging gun;
the upper limit voltage determining sub-circuit and the lower limit voltage determining sub-circuit output corresponding limit voltages according to the sampling voltage and the current access resistance value of the variable resistor of the corresponding determining sub-circuit, wherein the current access resistance value of the variable resistor in the upper limit voltage determining sub-circuit is determined according to the maximum resistance value of the CC2 resistor of the charging gun, and the current access resistance value of the variable resistor in the lower limit voltage determining sub-circuit is determined according to the minimum resistance value of the CC2 resistor of the charging gun;
the logic sub-circuit determines the limit voltage output by the sub-circuit according to the upper limit voltage and the lower limit voltage, and outputs logic judgment voltage representing a logic judgment result through high and low levels, and the logic sub-circuit comprises a resistor R10, a resistor R17, a resistor R7, a triode Q2 and a triode Q3; wherein a first end of the resistor R10 is configured to be connected with an output end of the lower limit voltage determination sub-circuit, a second end of the resistor R10 is connected with a base electrode of the triode Q2, an emitter electrode of the triode Q2 is connected with a first end of the resistor R7, and a second end of the resistor R7 is connected with a power supply VCC; a first end of the resistor R17 is configured to be connected with an output end of the upper limit voltage determination sub-circuit, a second end of the resistor R17 is connected with a base electrode of the triode Q3, an emitter electrode of the triode Q3 is connected with a collector electrode of the triode Q2, and the collector electrode of the triode Q3 is grounded; the emitter of the triode Q2 is configured as the output end of the logic sub-circuit;
The method for determining the limiting voltage output by the sub-circuit according to the upper limit voltage and the lower limit voltage, outputting the logic judgment voltage representing the logic judgment result through the high and low level, comprises the following steps: taking the limit voltage output by the lower limit voltage determination sub-circuit as the forward voltage of the triode Q2, and determining whether the triode Q2 is conducted or not; taking the limit voltage output by the upper limit voltage determination sub-circuit as the forward voltage of the triode Q3, and determining whether the triode Q3 is conducted or not; according to the conduction condition of the triode Q2 and the conduction condition of the triode Q3, outputting logic judgment voltage representing a logic judgment result through high and low levels from the output end of the logic sub-circuit;
and the logic judgment voltage is used by the isolation display sub-circuit for driving the optocoupler in the isolation display sub-circuit, so that whether the electric ship is successfully connected into the charging gun can be confirmed through the lighting condition of the optocoupler.
11. An electric vessel, characterized in that it comprises a circuit for connection confirmation of an electric vessel with a charging gun according to any one of claims 1-9.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115656873A (en) * | 2022-10-27 | 2023-01-31 | 成都肯保捷旭阳新能源电器有限公司 | PE grounding real-time detection circuit for alternating-current charging gun |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204405727U (en) * | 2014-12-26 | 2015-06-17 | 武汉泓承科技有限公司 | A kind ofly inputted/the circuit of under-voltage detection for electronic equipment |
| CN210924252U (en) * | 2019-12-09 | 2020-07-03 | 国网智能科技股份有限公司 | Electric automobile direct current rifle signal processing circuit that charges and affirmation system |
| CN110927430A (en) * | 2019-12-09 | 2020-03-27 | 国网智能科技股份有限公司 | System and method for detecting guide voltage of direct-current charging gun of electric vehicle |
| CN213780208U (en) * | 2020-11-10 | 2021-07-23 | 深圳市锐深科技有限公司 | Marine isolation national standard CC2 resistance detection circuit |
| CN112498138B (en) * | 2020-12-02 | 2024-12-31 | 力神（青岛）新能源有限公司 | A DC charging gun electronic lock driving circuit |
| CN112937337A (en) * | 2021-01-21 | 2021-06-11 | 华为技术有限公司 | Charging system and electric automobile |
| CN215772524U (en) * | 2021-09-14 | 2022-02-08 | 杭州晶志康电子科技有限公司 | Charger mains voltage abnormity protection circuit |
-
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115656873A (en) * | 2022-10-27 | 2023-01-31 | 成都肯保捷旭阳新能源电器有限公司 | PE grounding real-time detection circuit for alternating-current charging gun |
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| Publication number | Publication date |
|---|---|
| CN115776166A (en) | 2023-03-10 |
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