CN115776166A - Circuit and method for confirming connection between electric ship and charging gun and electric ship - Google Patents
Circuit and method for confirming connection between electric ship and charging gun and electric ship Download PDFInfo
- Publication number
- CN115776166A CN115776166A CN202310105854.5A CN202310105854A CN115776166A CN 115776166 A CN115776166 A CN 115776166A CN 202310105854 A CN202310105854 A CN 202310105854A CN 115776166 A CN115776166 A CN 115776166A
- Authority
- CN
- China
- Prior art keywords
- circuit
- sub
- resistor
- voltage
- charging gun
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model provides a circuit, method and electric ship that are used for electric ship and rifle that charges to be connected and confirm that relate to boats and ships technical field that charges, include: the voltage sampling sub-circuit is used for collecting sampling voltage of a voltage sampling point after the CC2 resistor of the charging gun is connected; 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 a logic judgment voltage representing a logic judgment result through a high level and a low level; 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 as to confirm whether the electric ship is successfully connected to the charging gun or not through the light emitting condition of the optical coupler. The accuracy of confirming whether the charging gun is successfully connected or not is improved, and the adaptability of the circuit is improved.
Description
Technical Field
The disclosure relates to the technical field of electric ship charging, and in particular relates to a circuit and a method for confirming connection between an electric ship and a charging gun, and the electric ship.
Background
When the battery of the electric ship is charged, in order to realize the purposes of quick charging and shortening the charging time, the electric ship is charged by a national standard direct current charging pile. When charging is connected, the charging gun connection needs to be confirmed, and the confirmation action is completed through the CC2 resistor.
Usually, according to the characteristic of the resistance of the CC2, the resistance value of the CC2 is mainly judged, and when the resistance value of the CC2 is within an allowable range, the successful connection of the charging gun can be confirmed. In the existing detection of the resistance value of the CC2 resistor, in a relevant scene, the ground of a CC2 detection circuit is connected with a marine 24V power ground, voltage is added to the CC2 resistor during detection, then the CC2 resistor is connected with the 24V power ground through a ground wire on a charging gun 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. Namely, the non-isolation common-ground method is a common detection method, that is, the voltage signal of the CC2 resistor is isolated first, and then the actual resistance value of the CC2 is obtained by adopting the non-isolation common-ground method.
In the methods, the voltage value corresponding to the CC2 resistor is detected, and when the actual resistance value of the CC2 resistor is calculated, the voltage needs to be converted into the resistor by means of a program, so that the calculation process is complex, and the accuracy of the result obtained by calculation is low.
Disclosure of Invention
In order to solve the technical problems that in related scenes, the calculation process is complex through program calculation, and the accuracy of the calculated result is low, the present disclosure provides a circuit and a method for confirming the connection between an electric ship and a charging gun, and the electric ship.
According to a first aspect of the embodiments of the present disclosure, there is provided a circuit for confirming connection of an electric ship and a charging gun, the circuit for confirming connection of an electric ship and a charging gun comprising:
the voltage sampling sub-circuit, the upper limit voltage determining sub-circuit and the lower limit voltage determining sub-circuit which are connected with the voltage sampling sub-circuit, the logic sub-circuit which is respectively connected with the upper limit voltage determining sub-circuit and the lower limit voltage determining sub-circuit, and the isolation display sub-circuit which is connected with 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 the voltage sampling sub-circuit is connected to a CC2 resistor of a 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, 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 is used for determining the limit voltage output by the sub-circuit according to the upper limit voltage and the limit voltage output by the lower limit voltage, and outputting a 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 light emitting condition of the optical coupler.
In one embodiment, the logic sub-circuit comprises a resistor R10, a resistor R17, a resistor R7, a transistor Q2 and a transistor Q3;
a first end of the resistor R10 is configured to be connected to an output end of the lower limit voltage determining 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 a power source VCC;
a first end of the resistor R17 is configured to be connected to an output end of the upper limit voltage determining sub-circuit, a second end of the resistor R17 is connected to a base of the transistor Q3, a collector of the transistor Q3 is connected to an emitter of the transistor Q2, and the emitter of the transistor 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 determining whether the triode Q2 is conducted or not by taking the limit voltage output by the upper limit voltage determining sub-circuit as the forward voltage of the triode Q2; and (c) a second step of,
the limit voltage output by the lower limit voltage determining sub-circuit is used as the forward voltage of the triode Q3, and whether the triode Q3 is conducted or not is determined;
and according to the conduction condition of the triode Q2 and the conduction condition of the triode Q3, outputting a logic judgment voltage representing a logic judgment result through high and low levels from the output end of the logic sub-circuit.
In one embodiment, the lower limit voltage determining sub-circuit comprises a variable resistor R4, a fixed resistor R12, a fixed resistor R10 and a comparator U2;
a first end of the variable resistor R4 is connected to a power supply, a second end of the variable resistor R4 is connected to a positive input end of the comparator U2, a second end of the variable resistor R4 is connected to a first end of the fixed resistor R12, and a 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 end of the comparator U2 is connected with a power supply, the negative power end of the comparator U2 is grounded, the output end of the comparator U2 is connected with the first end of the resistor R10, and the second end of the resistor R10 is configured as the output end of the lower limit voltage determining sub-circuit and is connected with the first input end of the logic sub-circuit;
and the lower limit voltage determining 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 determining 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, the output end of the comparator U1 is the output end of the upper limit voltage determining sub-circuit, and the output end of the comparator U1 is connected with the second input end of the logic sub-circuit;
the upper limit voltage determining 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 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;
wherein, a first end of the magnetic bead L3 is configured to be connected to a first end of a CC2 resistor of the charging gun, a second end of the magnetic bead L3 is connected to a first end of the resistor R8, a second end of the resistor R8 is connected to a first end of the resistor R9, a second end of the resistor R9 is connected to a first end of the resistor R3, a second end of the resistor R3 is connected to a power supply, a first end of the capacitor C6 is connected to a second end of the resistor R8 and a first end of the resistor R9, a second end of the capacitor C6 is grounded, the voltage sampling point is configured between the resistor R9 and the resistor R3, a first end of the capacitor C7 is connected to a connecting line between the second end of the resistor R9 and the voltage sampling point, and a second end of the capacitor C7 is grounded;
a first end of the magnetic bead L4 is configured to be connected with a second end of the CC2 resistor of the charging gun, and a second end of the magnetic bead L4 is grounded;
and a magnetic bead L3, a resistor R8, a resistor R9, a capacitor C6 and a capacitor C7 in the voltage sampling sub-circuit form a filtering loop, and the magnetic bead L4 is used for inhibiting interference from entering the voltage sampling sub-circuit from a grounding end.
In one embodiment, the isolated display sub-circuit comprises a resistor R11, a capacitor C8, an optical coupler U3, a resistor R6 and a resistor R5;
wherein a first end of the resistor R11 is configured as an input end of the isolated display sub-circuit and connected with an output end of the logic sub-circuit, a 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 a first end of the resistor R6, and a second end of the resistor R6 is connected with a power supply;
a collector of a transistor of the optical coupler U3 is connected with a first end of the resistor R5, and is used as an output end of the isolation display sub-circuit after being connected, the isolation display sub-circuit is used for outputting a level signal representing whether the charging gun is successfully connected, a second end of the resistor R5 is connected with a power supply, and an emitter of the transistor of the optical coupler U3 is grounded;
a first end of the capacitor C8 is connected to a connection line between a second end of the resistor R11 and a cathode of the diode of the optocoupler U3, and a second end of the capacitor C8 is grounded;
under the condition that the charging gun is successfully accessed, 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 outputs a low level signal representing the successful access of the charging gun;
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 confirming connection of the electric ship and the charging gun comprises:
the isolation power supply sub-circuit is connected with the voltage sampling sub-circuit, the upper limit voltage determining sub-circuit, the lower limit voltage determining sub-circuit, the logic sub-circuit and the isolation display sub-circuit;
the isolation power supply sub-circuit is used for performing double filtering of input voltage stabilizing filtering and output voltage filtering on the voltage provided by the power supply, and providing the filtered output voltage serving 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, wherein the input end filter sub-circuit and the output end filter sub-circuit 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 isolated power supply 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 isolated power supply module;
the output end filter sub-circuit comprises a magnetic bead L1, a capacitor C2, a capacitor C3, a resistor R1 and a diode D1, wherein a first end of the magnetic bead L1 is connected with an output end + v0 of the isolation power supply module, a second end of the magnetic bead L1 is respectively connected with a first end of the capacitor C2, a first end of the capacitor C3, a first end of the resistor R1 and a cathode of the diode D1 and is connected with a power supply end of each sub-circuit as an output end of the isolation power supply sub-circuit after being connected, and a second end of the capacitor C2, a second end of the capacitor C3, a second end of the resistor R1 and an anode of the diode D1 are all connected with an output end 0v of the isolation power supply sub-circuit and are grounded after being connected with the output end 0v of the isolation power supply sub-circuit;
the input end filter sub-circuit is used for performing voltage stabilization and filtering on the input voltage through a loop formed by the magnetic bead L2 and the capacitor C1;
the output end filter sub-circuit is used for smoothing 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 confirming connection of the electric ship and the charging gun comprises: a conversion sub-circuit connected with the isolated 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 to a battery management system of the electric ship according to the level of the level signal output by the isolation display sub-circuit.
In one embodiment, the converting 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 of the triode Q1, the base of the triode Q1 is connected with the output end of the isolation display sub-circuit, 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 the high-level signal representing the success of the electric ship accessing the charging gun is provided for the battery management system of the electric ship;
and under the condition that the output end of the isolation display sub-circuit outputs a low-level signal, the triode Q1 is cut off, and a low-level signal representing that the electric ship is not successfully accessed to the charging gun is provided for a battery management system of the electric ship.
According to a second aspect of the embodiments of the present disclosure, there is provided a method for confirming connection of a motorized ship and a charging gun, the method being applied to the circuit for confirming connection of a motorized ship and a charging gun according to any one of the first aspect;
the method comprises the following steps:
the voltage sampling sub-circuit collects sampling voltage of a voltage sampling point after the CC2 resistor connected to the charging gun is accessed;
the upper limit voltage determining sub-circuit and the lower limit voltage determining sub-circuit output corresponding limit voltage 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;
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 through high and low levels;
the isolation display sub-circuit uses the logic judgment voltage to drive an optical coupler in the isolation display sub-circuit, so that whether the electric ship is successfully connected to the charging gun or not can be confirmed through the light-emitting condition of the optical coupler.
According to a third aspect of the embodiments of the present disclosure, there is provided an electric boat including the circuit for confirming connection of the electric boat with a charging gun according to any one of the first aspects.
The following beneficial effects can be at least achieved through the technical scheme:
collecting sampling voltage of a voltage sampling point behind a CC2 resistor of an 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 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 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 through high and low levels; the isolation display sub-circuit uses the logic judgment voltage to drive an optical coupler in the isolation display sub-circuit, so that whether the electric ship is successfully connected to the charging gun or not can be confirmed through the light emitting condition of the optical coupler. The upper limit voltage determining sub-circuit and the lower limit voltage determining sub-circuit provide limit voltages, logic judgment voltages are 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 is improved according to the light emitting condition of the optical coupler, the variable resistor in the upper limit voltage determining sub-circuit and the lower limit voltage determining sub-circuit can be adjusted according to the resistance value of the CC2 resistor configured in the charging gun, connection of any charging gun can be determined, and circuit adaptability is improved.
Drawings
Fig. 1 is a circuit diagram of a circuit for confirmation of connection of an electric ship to a charging gun according to one embodiment.
Fig. 2 is a flowchart of a method for confirming connection of an electric ship and a charging gun according to an embodiment.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, embodiments accompanying the present disclosure are described in detail below. 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 different forms than those described herein, and those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present disclosure, and therefore the present disclosure is not limited to the specific embodiments disclosed below.
The disclosed embodiment provides a circuit for confirming connection of an electric ship and a charging gun, and referring to fig. 1, the circuit for confirming connection 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;
the voltage sampling sub-circuit 101 is configured with a voltage sampling point, and the voltage sampling sub-circuit 101 is used for collecting sampling voltage of the voltage sampling point after the voltage sampling sub-circuit is connected to a CC2 resistor of a 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 current access resistance value of a variable resistor of the corresponding determining sub-circuit, where the current access resistance value of the variable resistor in the upper limit voltage determining sub-circuit 103 is determined according to a maximum resistance value of a CC2 resistor of the charging gun, and the current access 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 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 through a light emitting condition of the optical coupler.
The circuit collects the sampling voltage of the voltage sampling point behind the CC2 resistor of the accessed charging gun through the voltage sampling sub-circuit; the upper limit voltage determining sub-circuit and the lower limit voltage determining sub-circuit output 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 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 through high and low levels; the isolation display sub-circuit uses the logic judgment voltage to drive an optical coupler in the isolation display sub-circuit, so that whether the electric ship is successfully connected to the charging gun or not can be confirmed through the light emitting condition of the optical coupler. The upper limit voltage determining sub-circuit and the lower limit voltage determining sub-circuit provide limit voltages, logic judgment voltages are 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 is improved according to the light emitting condition of the optical coupler, the variable resistor in the upper limit voltage determining sub-circuit and the lower limit voltage determining sub-circuit can be adjusted according to the resistance value of the CC2 resistor configured in the charging gun, connection of any charging gun can be determined, and circuit adaptability 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;
a first end of the resistor R10 is configured to be connected to the output end of the lower limit voltage determining sub-circuit 102, a second end of the resistor R10 is connected to the 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 a power supply VCC;
a first end of the resistor R17 is configured to be connected to an output end of the upper limit voltage determining sub-circuit 103, a second end of the resistor R17 is connected to a base of the transistor Q3, a collector of the transistor Q3 is connected to an emitter of the transistor Q2, and an emitter of the transistor 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 use the limit voltage output by the upper limit voltage determining sub-circuit 103 as a forward voltage of the transistor Q2, and determine whether the transistor Q2 is turned on; and (c) a second step of,
the limit voltage output by the lower limit voltage determining sub-circuit 102 is used as the forward voltage of the triode Q3 to determine whether the triode Q3 is conducted;
and according to the conduction condition of the triode Q2 and the conduction condition of the triode Q3, outputting a logic judgment voltage representing a logic judgment result through high and low levels from the output end of the logic sub-circuit 104.
In the embodiment of the present disclosure, R10 and R17 in the logic sub-circuit 104 function as current-limiting protection triodes, Q2 and Q3 are PNP triodes to form an or gate logic circuit, R7 functions as a current-limiting protection power supply, and V5 is a logic judgment output result. When the upper and lower limit determining subcircuit outputs the result to the logic judgment circuit, the logic judgment rule is as follows:
(1) when the resistance of CC2 is in the range of 0.8K omega to RCC2 to 1.2K omega, V3=0V, Q2 is conducted, V4=0V, Q3 is conducted, VCC, R7, Q2, Q3, GND form a loop, and the output voltage V5=0V (low level);
(2) when RCC2 < 0.8K Ω, V3=1v, q2 is not on, V4=0v, and q3 is on, VCC, R7, Q2, Q3, and GND cannot form a loop, and the output voltage V5=5V (high level);
(3) when RCC2 > 1.2K Ω, V3=0v, q2 is on, V4=5v, and q3 is not on, VCC, R7, Q2, Q3, and GND cannot form a loop, and the output voltage V5=5V (high level).
The judgment result of the resistance of the CC2 can be obtained through an OR gate logic judgment circuit, 0V voltage is output when the resistance accords with the range, 5V voltage is output when the resistance does not accord with the range, namely when the resistance of the CC2 accords with the requirement that RCC2 is more 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;
a first end of the variable resistor R4 is connected to a power supply, a second end of the variable resistor R4 is connected to a positive input end of the comparator U2, a second end of the variable resistor R4 is connected to a first end of the fixed resistor R12, and a second end of the resistor R12 is grounded;
an inverting input end of the comparator U2 is configured to be connected with the voltage sampling point, a positive power end of the comparator U2 is connected with a power supply, a negative power end of the comparator U2 is grounded, an output end of the comparator U2 is connected with a first end of the resistor R10, and a second end of the resistor R10 is configured as an output end of the lower limit voltage determining sub-circuit 102 and is connected with a first input end 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 the current access resistance value of the variable resistor R4.
Referring to fig. 1, the lower limit voltage determining sub-circuit 102 is also shown to include a capacitor C5.
In the embodiment of the present disclosure, the R12 resistor is a resistor specifically set for the lower limit resistance parameter of the CC2 resistor, and is matched with the R4 at the upper end to divide the voltage of the 5V power supply, so as to determine whether the CC2 resistor exceeds the lower limit of the specified range. Wherein, R4=12K Ω, R13=1K Ω, U2 is TLV2333IDR, C5=100nF.
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 the lower limit reference voltage. Inputting a sampling voltage VCC2 to the No. 2 pin of the negative input end of an operational amplifier U2, and outputting V3=0V (low level) by the operational amplifier U2 when VCC2 is more than or equal to 2.6V (namely RCC2 is more than or equal to 0.8K omega) by utilizing the characteristic of a specific comparator of the operational amplifier; when VCC2 < 2.6V (i.e., RCC2 < 0.8K Ω), the op-amp U2 output V3=5V (high).
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 with the voltage sampling point, the output terminal of the comparator U1 is the output terminal of the upper limit voltage determination sub-circuit 103, and is connected with the second input terminal of the logic sub-circuit 104;
the upper limit voltage determining subcircuit 103 is configured to determine an 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.
The resistor specifically set in the upper limit voltage determination subcircuit 103, in which R15 is an upper limit resistance parameter of the CC2 resistor, is matched with the upper end R14, and divides the 5V power supply, so as to determine whether the CC2 resistor exceeds the upper limit of the specified 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 as the upper limit reference voltage. Inputting a sampling voltage VCC2 to the 5 th pin of the positive input end of an operational amplifier U2.2, and by using the characteristic of a comparator of the operational amplifier, when VCC2 is less than or equal to 2.8V (namely RCC2 is less than or equal to 1.2K omega), outputting V4=0V (low level) by the operational amplifier U1; when VCC2 > 2.8V (i.e., RCC2 > 1.2K Ω), the operational amplifier 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;
wherein a first end of the magnetic bead L3 is configured to be connected to a first end of a CC2 resistor of the charging gun, a second end of the magnetic bead L3 is connected to a first end of the resistor R8, a second end of the resistor R8 is connected to a first end of the resistor R9, a second end of the resistor R9 is connected to a first end of the resistor R3, a second end of the resistor R3 is connected to a power supply, a first end of the capacitor C6 is connected to a second end of the resistor R8 and a first end of the resistor R9, a second end of the capacitor C6 is grounded, the voltage sampling point is configured between the resistor R9 and the resistor R3, a 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 a second end of the capacitor C7 is grounded;
a first end of the magnetic bead L4 is configured to be connected with a second end of the CC2 resistor of the charging gun, and a second end of the magnetic bead L4 is grounded;
magnetic bead L3, resistance R8, resistance R9, electric capacity C6 and electric capacity C7 constitute the filtering circuit among the voltage sampling sub-circuit 101, magnetic bead L4 is used for suppressing the interference and gets into from the ground terminal voltage sampling sub-circuit 101.
In the embodiment of the present disclosure, the resistors RCC2, R8, R9, and R3, the magnetic beads L3 and L4, and the capacitors C6 and C7 constitute a CC2 resistor sampling circuit. The RCC2 is a CC2 resistor inside the charging gun end, the nominal resistance is 1K omega, the allowable error is +/-20%, and the allowable range is 0.8K-1.2K omega. L3, R8, C6, R9 and C7 form an input end two-stage RC filter circuit, and a CC2 resistor negative terminal L4 plays a role of restraining interference from entering a next-stage circuit from the negative terminal. Since the resistances of the magnetic beads L3 and L4 are O Ω, a voltage divider circuit is formed by RCC2, R8, R9, and R3, where R8= R9=680 Ω, C6= = C7=2.2uf, and R3=2k Ω, and the voltage is calculated as follows;
VCC2=5V when RCC2 of the charging gun is not accessed;
when the RCC2 of the charging gun is switched in,
VCC2=[(RCC2+R8+R9)/(RCC2+R8+R9+R3)]*5=(RCC2+1.36KΩ)*5V/(RCC2+3.36KΩ)；
if RCC2=0.8K Ω,
VCC2=(0.8KΩ+1.36KΩ)*5V/(0.8KΩ+3.36KΩ)=2.6V；
if RCC2=1.2K Ω,
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 resistance CC2 can be obtained.
In one embodiment, referring to fig. 1, the isolated display sub-circuit 105 includes a resistor R11, a capacitor C8, an optocoupler U3, a resistor R6, and a resistor R5;
wherein a first terminal of the resistor R11 is configured as an input terminal of the isolated display sub-circuit 105, and is connected to an output terminal of the logic sub-circuit 104, a second terminal 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 terminal of the resistor R6, and a second terminal of the resistor R6 is connected to a power supply;
a collector of the transistor of the optocoupler U3 is connected with a first end of the resistor R5, and is used as an output end of the isolation display sub-circuit 105 after connection, so as to output a level signal representing whether the charging gun is successfully connected, a second end of the resistor R5 is connected with a power supply, and an emitter of the transistor of the optocoupler U3 is grounded;
a first end of the capacitor C8 is connected to a connection line between a second end of the resistor R11 and a cathode of the diode of the optocoupler U3, and a second end of the capacitor C8 is grounded;
under the condition that the charging gun is successfully accessed, 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 successful access of the charging gun;
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 105 outputs a high-level signal representing that the charging gun is not successfully connected.
When V5=0V, a diode at the input end of the optical coupler works to emit light, transistors or MOS (metal oxide semiconductor) transistors at 3 and 4 pins of the driving output end are conducted, and the output end V6=0V (low level) of the isolation optical coupler is isolated; when V5=5V, the diode at the input end of the optical coupler does not work, the light emission is stopped, the transistor or the MOS transistor at the output end is conducted and not conducted, and the voltage V6=5V (high level) at the output end. The input signal is transmitted to the next stage, and meanwhile, the isolation from the signal is also realized physically, so that an interference source is prevented from being transmitted to the next stage circuit. Namely, when the resistance of the CC2 meets the requirement that RCC2 is less than or equal to 0.8K omega and less than or equal to 1.2K omega, the output voltage of the V6 is 0V (low level).
In one embodiment, the circuit for confirming connection of the electric ship and the charging gun comprises:
an isolated power supply sub-circuit, which is connected to the voltage sampling sub-circuit 101, the upper limit voltage determining sub-circuit 103, the lower limit voltage determining sub-circuit 102, the logic sub-circuit 104, and the isolated display sub-circuit 105;
the isolation power supply sub-circuit is used for performing double filtering of input voltage stabilization filtering and output voltage stabilization filtering on the voltage provided by the power supply, and providing the filtered output voltage serving as working power to each sub-circuit.
In one embodiment, the isolation power supply sub-circuit comprises an isolation power supply module U1, an input end filter sub-circuit and an output end filter sub-circuit, which are both connected with the isolation power supply module U1;
the input end filtering sub-circuit comprises a magnetic bead L2 and a capacitor C1, a first end of the magnetic bead L2 is configured as a power supply input end of the isolated power supply sub-circuit and 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 and a GND pin of an isolated power supply module are grounded together, and a second end of the magnetic bead L2 is connected with a VIN end of the isolated power supply module;
the output end filter sub-circuit comprises a magnetic bead L1, a capacitor C2, a capacitor C3, a resistor R1 and a diode D1, wherein a first end of the magnetic bead L1 is connected with an output end + v0 of the isolation power supply module, a second end of the magnetic bead L1 is respectively connected with a first end of the capacitor C2, a first end of the capacitor C3, a first end of the resistor R1 and a cathode of the diode D1 and is connected with a power supply end of each sub-circuit as an output end of the isolation power supply sub-circuit after being connected, and a second end of the capacitor C2, a second end of the capacitor C3, a second end of the resistor R1 and an anode of the diode D1 are all connected with an output end 0v of the isolation power supply sub-circuit and are grounded after being connected with the output end 0v of the isolation power supply sub-circuit;
the input end filter sub-circuit is used for performing voltage stabilization and filtering on the input voltage through a loop formed by the magnetic bead L2 and the capacitor C1;
the output end filter sub-circuit is used for smoothing 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, the capacitor C4 is 1nF, and a first terminal of the capacitor C4 is connected to a connection line between the capacitor C1 and the GND pin of the isolated power supply module.
U1 is 5V isolation power module, and VCC is output power, and VCC is used for providing working power for being used for the circuit that electric ship and the rifle that charges are connected and are confirmed. In the circuit, the magnetic bead L2 and the capacitor C1 form an input end LC filter circuit, and the input voltage stabilization effect is achieved. The output end L1, the output end C2 and the output end C3 form an LC filtering output circuit which plays a role in smoothing the output voltage, the output end R1 is a preset load of the output end and stabilizes the output effect of the U1 isolation power supply, and finally the D1 voltage regulator tube further filters the output voltage to enable the output voltage to be more stable.
In one embodiment, since the output voltage of the isolated display sub-circuit is 0V, and external interference is relatively easily received, which causes misjudgment, it is necessary to perform a level transition from low level to high level, and therefore the circuit for confirming the connection between the electric ship and the charging gun includes: a conversion sub-circuit connected to the isolated 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 a battery management system of the electric ship according to the level signal output by the isolation display sub-circuit 105.
In one embodiment, the converting 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 of the triode Q1, the base of the triode Q1 is connected with the output end of the isolation display sub-circuit 105, and the triode Q1 is grounded;
under the condition 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 the success of the electric ship accessing the charging gun to a battery management system of the electric ship;
in the case that the output end of the isolation display sub-circuit 105 outputs a low level signal, the triode Q1 is turned off, and a low level signal representing that the electric ship is not successfully connected to the charging gun is provided to the battery management system of the electric ship.
When V6=0V, the triode Q1 is not conducted, the output voltage which is used for representing that the electric ship is not successfully connected with the charging gun is 5V (high level) and is provided for the battery management system of the electric ship, and when V6=5V, the triode Q1 is conducted, the output voltage which is used for representing that the electric ship is not successfully connected with the charging gun is 0V (low level) and is provided for the battery management system of the electric ship.
And finally, reading the output voltage by the MCU of the battery management system, wherein the output voltage is only distinguished by 5V (high level) and 0V (low level), so that a special ADC pin is not needed, only a general GPIO port is used, and meanwhile, the signal is only judged in high and low in program, and the result of the CC2 resistor can be obtained without performing more conversion steps. When the MCU reads a high level, the resistance CC2 is judged to be switched in, namely the charging gun is switched in place. If the MCU reads a low level, the resistance is judged to be no CC2 resistance, namely the charging gun is not connected or the connection is unreliable.
The embodiment of the present disclosure further provides a method for confirming connection between an electric ship and a charging gun, where the method is applied to the circuit for confirming connection between an electric ship and a charging gun in any one of the foregoing embodiments;
referring to fig. 2, the method includes:
in step S21, the voltage sampling sub-circuit collects a sampling voltage of a voltage sampling point after the CC2 resistor connected to the charging gun is accessed;
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, where 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 a limit voltage output by the sub-circuit according to the upper limit voltage and a limit voltage output by the lower limit voltage, and outputs a logic determination voltage representing a logic determination result by a high level and a low level;
in step S24, the isolation display sub-circuit uses the logic determination voltage to drive an optical coupler in the isolation display sub-circuit, so as to confirm whether the electric ship is successfully connected to the charging gun through the light emitting condition of the optical coupler.
The embodiment of the present disclosure further provides an electric ship, which includes the circuit for confirming connection between the electric ship and the charging gun in any one of the foregoing embodiments.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-described embodiments are merely illustrative of several embodiments of the present disclosure, which are described in more detail and detailed, but are not to be construed as limiting the scope of the disclosure. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the disclosure, and these changes and modifications are all within the scope of the disclosure. Therefore, the protection scope of the present disclosure should be subject to the appended claims.
Claims (12)
1. A circuit for confirming that an electric ship is connected with a charging gun is characterized by comprising the following components:
the voltage sampling sub-circuit, the upper limit voltage determining sub-circuit and the lower limit voltage determining sub-circuit which are connected with the voltage sampling sub-circuit, the logic sub-circuit which is respectively connected with the upper limit voltage determining sub-circuit and the lower limit voltage determining sub-circuit, and the isolation display sub-circuit which is connected with 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 the voltage sampling sub-circuit is connected to a CC2 resistor of a 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, 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 is used for determining the limit voltage output by the sub-circuit according to the upper limit voltage and the limit voltage output by the lower limit voltage, and outputting a logic judgment voltage representing a logic judgment result through a high level and a low level;
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 with the charging gun or not through the light-emitting condition of the optical coupler.
2. The circuit for confirmation of connection of an electric ship to a charging gun according to claim 1, wherein the logic sub-circuit comprises a resistor R10, a resistor R17, a resistor R7, a transistor Q2 and a transistor Q3;
a first end of the resistor R10 is configured to be connected to an output end of the lower limit voltage determining 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 a power supply VCC;
a first end of the resistor R17 is configured to be connected to an output end of the upper limit voltage determining sub-circuit, a second end of the resistor R17 is connected to a base of the transistor Q3, a collector of the transistor Q3 is connected to an emitter of the transistor Q2, and the emitter of the transistor Q3 is grounded;
the collector of the triode Q2 is configured as the output end of the logic subcircuit;
the logic sub-circuit is used for determining whether the triode Q2 is conducted or not by taking the limit voltage output by the upper limit voltage determining sub-circuit as the forward voltage of the triode Q2; and the number of the first and second groups,
the limit voltage output by the lower limit voltage determining sub-circuit is used as the forward voltage of the triode Q3, and whether the triode Q3 is conducted or not is determined;
and according to the conduction condition of the triode Q2 and the conduction condition of the triode Q3, outputting a logic judgment voltage representing a logic judgment result through high and low levels from the output end of the logic sub-circuit.
3. The circuit for confirmation of connection of an electric boat with a charging gun according to claim 1, wherein the lower limit voltage determining sub-circuit includes a variable resistor R4, a fixed resistor R12, a fixed resistor R10, and a comparator U2;
a first end of the variable resistor R4 is connected to a power supply, a second end of the variable resistor R4 is connected to a positive input end of the comparator U2, a second end of the variable resistor R4 is connected to a first end of the fixed resistor R12, and a 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 end of the comparator U2 is connected with a power supply, the negative power end of the comparator U2 is grounded, the output end of the comparator U2 is connected with the first end of the resistor R10, and the second end of the resistor R10 is configured as the output end of the lower limit voltage determining sub-circuit and is connected with the first input end of the logic sub-circuit;
and the lower limit voltage determining 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.
4. The circuit for confirmation of connection of an electric boat with a charging gun according to claim 1, wherein the upper limit voltage determining 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, the output end of the comparator U1 is the output end of the upper limit voltage determining sub-circuit, and the output end of the comparator U1 is connected with the second input end of the logic sub-circuit;
the upper limit voltage determining 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.
5. The circuit for confirming connection of a motorized watercraft with 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;
wherein a first end of the magnetic bead L3 is configured to be connected to a first end of a CC2 resistor of the charging gun, a second end of the magnetic bead L3 is connected to a first end of the resistor R8, a second end of the resistor R8 is connected to a first end of the resistor R9, a second end of the resistor R9 is connected to a first end of the resistor R3, a second end of the resistor R3 is connected to a power supply, a first end of the capacitor C6 is connected to a second end of the resistor R8 and a first end of the resistor R9, a second end of the capacitor C6 is grounded, the voltage sampling point is configured between the resistor R9 and the resistor R3, a 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 a second end of the capacitor C7 is grounded;
a first end of the magnetic bead L4 is configured to be connected with a second end of the CC2 resistor of the charging gun, and a second end of the magnetic bead L4 is grounded;
and a magnetic bead L3, a resistor R8, a resistor R9, a capacitor C6 and a capacitor C7 in the voltage sampling sub-circuit form a filtering loop, and the magnetic bead L4 is used for inhibiting interference from entering the voltage sampling sub-circuit from a grounding end.
6. The circuit for confirmation of connection of a motorized watercraft with 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 a first end of the resistor R11 is configured as an input end of the isolated display sub-circuit and connected with an output end of the logic sub-circuit, a 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 a first end of the resistor R6, and a second end of the resistor R6 is connected with a power supply;
a collector of a transistor of the optical coupler U3 is connected with a first end of the resistor R5, and is used as an output end of the isolation display sub-circuit after being connected, so as to output a level signal for representing whether a charging gun is successfully connected, a second end of the resistor R5 is connected with a power supply, and an emitter of the transistor of the optical coupler U3 is grounded;
a first end of the capacitor C8 is connected to a connection line between a second end of the resistor R11 and a cathode of the diode of the optocoupler U3, and a second end of the capacitor C8 is grounded;
under the condition that the charging gun is successfully accessed, 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 outputs a low level signal representing the successful access of the charging gun;
and under the condition that the charging gun is not successfully connected, the optical coupler U3 does not emit light, the 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.
7. The circuit for confirmation of connection of a motorized watercraft to a charging gun according to any one of claims 1 to 6, wherein the circuit for confirmation of connection of a motorized watercraft to a charging gun comprises:
the isolation power supply sub-circuit is connected with the voltage sampling sub-circuit, the upper limit voltage determining sub-circuit, the lower limit voltage determining sub-circuit, the logic sub-circuit and the isolation display sub-circuit;
the isolation power supply sub-circuit is used for performing double filtering of input voltage stabilizing filtering and output voltage filtering on the voltage provided by the power supply, and providing the filtered output voltage serving as working power to each sub-circuit.
8. The circuit for confirming connection of a motorized watercraft with a charging gun of claim 7, wherein the isolated power supply sub-circuit comprises an isolated power supply module, an input side filter sub-circuit and an output side 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 isolated power supply 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 isolated power supply module;
the output end filter sub-circuit comprises a magnetic bead L1, a capacitor C2, a capacitor C3, a resistor R1 and a diode D1, wherein a first end of the magnetic bead L1 is connected with an output end + v0 of the isolation power supply module, a second end of the magnetic bead L1 is respectively connected with a first end of the capacitor C2, a first end of the capacitor C3, a first end of the resistor R1 and a cathode of the diode D1, and is connected with a power supply end of each sub-circuit as an output end of the isolation power supply sub-circuit after being connected, and a second end of the capacitor C2, a second end of the capacitor C3, a second end of the resistor R1 and an anode of the diode D1 are all connected with an output end 0v of the isolation power supply sub-circuit and are grounded after being connected with the output end 0v of the isolation power supply sub-circuit;
the input end filter sub-circuit is used for performing voltage stabilization filtering on the input voltage through a loop formed by the magnetic bead L2 and the capacitor C1;
the output end filter sub-circuit is used for smoothing the output voltage through a loop formed by the magnetic bead L1, the capacitor C2 and the capacitor C3.
9. The circuit for confirmation of connection of a motorized watercraft to a charging gun according to any one of claims 1 to 6, wherein the circuit for confirmation of connection of a motorized watercraft to a charging gun comprises: a conversion sub-circuit connected with the isolated 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 to a battery management system of the electric ship according to the level of the level signal output by the isolation display sub-circuit.
10. The circuit of claim 9, wherein the converting 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 of the triode Q1, the base of the triode Q1 is connected with the output end of the isolation display sub-circuit, 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 the high-level signal representing the success of the electric ship accessing the charging gun is provided for the battery management system of the electric ship;
and under the condition that the output end of the isolation display sub-circuit outputs a low-level signal, the triode Q1 is cut off, and a low-level signal representing that the electric ship is not successfully connected with the charging gun is provided for a battery management system of the electric ship.
11. A method for confirming connection of a motorized ship and a charging gun, which is applied to the circuit for confirming connection of a motorized ship and a charging gun according to any one of claims 1 to 10;
the method comprises the following steps:
the voltage sampling sub-circuit collects sampling voltages of voltage sampling points after the CC2 resistor connected to the charging gun is accessed;
the upper limit voltage determining sub-circuit and the lower limit voltage determining sub-circuit output corresponding limit voltage 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;
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 through high and low levels;
the isolation display sub-circuit uses the logic judgment voltage to drive an optical coupler in the isolation display sub-circuit, so that whether the electric ship is successfully connected to the charging gun or not can be confirmed through the light-emitting condition of the optical coupler.
12. A motorized watercraft, characterized in that it comprises a circuit for confirmation of connection of the motorized watercraft to a charging gun according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310105854.5A CN115776166B (en) | 2023-02-13 | 2023-02-13 | Circuit and method for confirming connection of electric ship and charging gun and electric ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310105854.5A CN115776166B (en) | 2023-02-13 | 2023-02-13 | Circuit and method for confirming connection of electric ship and charging gun and electric ship |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115776166A true CN115776166A (en) | 2023-03-10 |
| CN115776166B CN115776166B (en) | 2023-05-09 |
Family
ID=85393667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310105854.5A Active CN115776166B (en) | 2023-02-13 | 2023-02-13 | Circuit and method for confirming connection of electric ship and charging gun and electric ship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115776166B (en) |
Citations (8)
| 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 |
| 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 |
| 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 |
| CN112498138A (en) * | 2020-12-02 | 2021-03-16 | 力神动力电池***有限公司 | Electronic lock driving circuit of direct-current charging gun |
| 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 |
| 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 |
| US20220209565A1 (en) * | 2021-01-21 | 2022-06-30 | Huawei Digital Power Technologies Co., Ltd. | Charging system and electric vehicle |
| 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 |
-
2023
- 2023-02-13 CN CN202310105854.5A patent/CN115776166B/en active Active
Patent Citations (8)
| 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 |
| 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 |
| 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 |
| 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 |
| CN112498138A (en) * | 2020-12-02 | 2021-03-16 | 力神动力电池***有限公司 | Electronic lock driving circuit of direct-current charging gun |
| US20220209565A1 (en) * | 2021-01-21 | 2022-06-30 | Huawei Digital Power Technologies Co., Ltd. | Charging system and electric vehicle |
| 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 |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 宋祥兵: "电动汽车应急充电***研究" * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115776166B (en) | 2023-05-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11848669B2 (en) | Wake-up circuit and wake-up method | |
| US20110241627A1 (en) | Battery charger for portable electronic equipment | |
| CN105871381B (en) | Industrial bus terminal realizing circuit capable of supplying power and decoding method thereof | |
| US20120293161A1 (en) | Alternating current voltage detection circuit | |
| JP2016189189A (en) | Memory device for storing operational data of electronic apparatus, and system for the same | |
| US9395395B2 (en) | Voltage detector, electronic device, and control method of voltage detector | |
| US20150156585A1 (en) | Method and device for automatically identifying microphone pin and ground pin of audio interface and electronic signature token | |
| US7265518B2 (en) | Method of automatically cutting off power in case of low battery voltage in mobile electronic unit | |
| CN110806879A (en) | Burning debugging circuit and burning debugger | |
| CN112965012A (en) | Power supply polarity reverse connection testing device, testing system and testing method | |
| CN106502368B (en) | OTG peripheral control method and system of mobile terminal | |
| CN115776166A (en) | Circuit and method for confirming connection between electric ship and charging gun and electric ship | |
| CN204903740U (en) | Power detecting circuit | |
| CN215009573U (en) | Power supply overvoltage protection circuit | |
| CN212447139U (en) | Window comparison circuit and automobile direct-current charging confirmation circuit | |
| CN203149024U (en) | Battery under-voltage alarm device | |
| JP2004274874A (en) | Charge control circuit | |
| US20120274308A1 (en) | Voltage detection circuit | |
| US20120007566A1 (en) | Charging circuit | |
| JP2007228051A (en) | Communication cable | |
| CN113866672B (en) | Abnormal state alarm circuit, device and method for charger | |
| CN114325040B (en) | Pulse voltage detection circuit | |
| CN114006462B (en) | Power-off protection circuit, electronic equipment and power-off protection method | |
| CN110031692A (en) | A kind of auxiliary mobile unit accurately identifies the method and circuit of ACC state | |
| CN111381524A (en) | Power supply control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |