CN105375572A - Intelligent detection device for electric automobile AC charging pile - Google Patents
Intelligent detection device for electric automobile AC charging pile Download PDFInfo
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- CN105375572A CN105375572A CN201510843817.XA CN201510843817A CN105375572A CN 105375572 A CN105375572 A CN 105375572A CN 201510843817 A CN201510843817 A CN 201510843817A CN 105375572 A CN105375572 A CN 105375572A
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- 238000001514 detection method Methods 0.000 title claims abstract description 32
- 239000013256 coordination polymer Substances 0.000 claims abstract description 56
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 23
- 238000012360 testing method Methods 0.000 claims description 65
- 238000007689 inspection Methods 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 9
- 230000013011 mating Effects 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 abstract description 6
- 238000004891 communication Methods 0.000 description 18
- 230000006870 function Effects 0.000 description 17
- 238000010586 diagram Methods 0.000 description 13
- 230000006872 improvement Effects 0.000 description 11
- 239000003381 stabilizer Substances 0.000 description 11
- 230000001012 protector Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- H02J7/022—
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
- B60L53/31—Charging columns specially adapted for electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
Abstract
The invention discloses an intelligent detection device for an electric automobile AC charging pile. The intelligent detection device comprises a CPU processing system, an LCD displayer, an auxiliary power supply circuit, a power switch circuit, a button circuit, an automobile terminal charging interface circuit, a CC detection circuit, a CP detection circuit, an indicating lamp circuit, a PWM detection circuit, a program control circuit and an electric meter circuit. The intelligent detection device has the following advantages that (1) detection of charging cable power is realized; (2) detection of PWM frequency, duty ratio and amplitude of the charging pile is realized, and the result is displayed and judged; (3) load power overload is controlled by PWM duty ratio, and an overcurrent protection function of the charging pile is inspected; (5) detection of voltage and current values in the charging process is realized; (6) an automobile abnormal phenomenon is simulated, and whether the charging pile can detect and process the automobile abnormal phenomenon is judged; and (7) the intelligent detection device has overvoltage protection, under-voltage protection, overcurrent protection, over-temperature protection and overcharge protection.
Description
Technical field
The present invention relates to a kind of checkout gear, particularly relate to a kind of intelligent detection device being exclusively used in electric vehicle alternating-current charging pile; Belong to electric automobile intelligent charge facility applied technical field.
Background technology
Electric vehicle alternating-current charging pile intelligent detection device fills checkout gear in of facility to electric automobile, this unit simulation popular interface function of electric automobile, detects interface and the charging sequential function of alternating-current charging pile; By communicating with alternating-current charging pile, the frequency of the pwm signal that charging pile sends can be detected, duty ratio, amplitude, the maximum output current ability simultaneously represented according to duty ratio is carried out control load case and is transshipped by charging current, detect charging pile and whether possess overload protection ability, this function is concerning very crucial charging pile;
At present charging pile checkout gear on the market extremely lacks, and function singleness, can only simulate car end and allow the function of filling, not have measuring ability, do not have arbitration functions, do not have most test function.
Summary of the invention
The present invention is in order to make up the deficiencies in the prior art, there is provided that a kind of structure is simple, each state of automatic imitation vehicle, the flow process of analog charge, detect the sequence problem in charging process, simultaneously can regulating load power, can analog charge process and analog charge exception procedure effectively, the inspection interface capability of alternating-current charging pile and the ability of major protective function;
For achieving the above object, the technical scheme that the present invention takes is:
An intelligent detection device for electric vehicle alternating-current charging pile, comprises CPU treatment system, LCD display, auxiliary power circuit, power switch circuit, key circuit, car end charging inlet circuit, CC testing circuit, CP testing circuit, indicator light circuit, PWM testing circuit, programme control circut, meter circuit; Wherein,
Described CPU treatment system, for having controlled charging flow, and relevant signals collecting and protection act; Can program control regulating load size, whether test out charging pile has overcurrent protection function etc.;
Described LCD display, for showing the signal message and test result that detect;
Described auxiliary power circuit, for realizing the conversion of+5V to+3.3V, provides operating voltage to CPU treatment system;
Whether described power switch circuit, press for sense switch, is communicated with different power supplys;
Whether described key circuit, press for sense switch;
Whether described car end charging inlet circuit, receive the output of electrical source of power, electrical source of power signal be converted to Transistor-Transistor Logic level signal and facilitate CPU to detect for inspection vehicle end;
Described CC testing circuit, for detecting CC signal;
Described CP testing circuit, for detecting CP signal;
Whether described indicator light circuit, pass through for pointing out test;
Described PWM testing circuit, detects the frequency of CP+, CP-and duty ratio for realization;
Described programme control circut, for automatically loading the load of certain current value, analog charge;
Described meter circuit, for detecting the electric current and voltage value that charging pile exports;
Further improvement, is provided with CPU processor U1 in described CPU treatment system; 37 pin of described CPU processor U1 are connected with a resistance R108; 55 pin of described CPU processor U1 are connected with described auxiliary power circuit; 15 ~ 18 pin of described CPU processor U1 are connected with described power switch circuit, key circuit respectively; 29 pin of described CPU processor U1 are connected with described car end charging inlet circuit; 65 pin of described CPU processor U1 are connected with described CC testing circuit; 47 pin of described CPU processor U1,48 pin, 51 pin are connected with described meter circuit; 25 ~ 26 pin of described CPU processor U1 are connected with described programme control circut; 23 ~ 24 pin, 67 pin of described CPU processor U1 are connected with described PWM testing circuit; 33 ~ 34 pin, 63 ~ 64 pin of described CPU processor U1 are connected with described indicator light circuit; 56 pin of described CPU processor U1 are connected with described CP testing circuit; 78 ~ 88 pin of described CPU processor U1 are connected with described LCD display;
Further improvement, auxiliary power circuit described in described auxiliary power circuit comprises four filter circuits, is respectively the first filter circuit, the second filter circuit, the 3rd filter circuit, the 4th filter circuit; Voltage-stabiliser tube U3, display circuit and Wiring port J10; ; By coordinating of this voltage-stabiliser tube U3 and the first filter circuit, the second filter circuit, the 3rd filter circuit, the 4th filter circuit, display circuit and Wiring port J10 ,+3.3V voltage is become to export+5V the voltage transformation of input;
Further improvement, is provided with four switches in described power switch circuit, be respectively switch S 1, switch S 2, switch S 3, switch S 4; Under the control of CPU processor U1, by the break-make of these four switch S 1, S2, S3, S4, realize the inspection of whether UNICOM's power supply; Described power switch circuit is identical with the circuit structure of described key circuit;
Further improvement, described car end charging inlet circuit comprises rectifier D501, optical coupler U501, resistance R502/R503, electric capacity C501; Under the control of CPU processor U1, realize car end by the acting in conjunction of rectifier D501, optical coupler U501 and surrounding resistance R502/R503, electric capacity C501 and whether receive the inspection that electrical source of power exports; Meanwhile, electrical source of power signal being converted to Transistor-Transistor Logic level signal facilitates CPU to detect;
Further improvement, described CC testing circuit comprises amplifier U1A, resistance R15/R16/R19/R20/R22/R23, electric capacity C19/C20/C22/C23; Under the control of CPU processor U1, by amplifier U1A and the resistance R15/R16/R19/R20/R22/R23 of surrounding, the common mating reaction of electric capacity C19/C20/C22/C23, realize the inspection of CC signal;
Further improvement, described programme control circut comprises communication chip U6, electric capacity C33/C34/C36/C37/C31/C32/C29/C30; , Wiring port J5; Under the control of CPU processor U1, by the connection of communication chip U6 and Wiring port J5, and under the mating reaction of surrounding load capacitance C33/C34/C36/C37/C31/C32/C29/C30, realize the communication of RS232, make programme control circut can simulate the different charge powers of car end;
Further improvement, described meter circuit comprises ammeter chip U8, resistance R41/R42/R44; Under the control of CPU processor U1, under the mating reaction by load resistance R41/R42/R44 around ammeter chip U8, realize exactly for metering and billing provides data, operate ammeter alternately by serial line interface and ancillary equipment ammeter;
Further improvement, described indicator light circuit comprises resistance R205/R206/R207/R208, light-emitting diode D202/D203/D204/D205; Under the control of CPU processor U1, realized the state of indicating equipment and charging by light-emitting diode D202/D203/D204/D205;
Further improvement, described LCD display comprises resistance R50/R51, adjustable resistance RX1, electric capacity C50, inductance B1/B2/B3/B6/B7/B8/B9/B10/B11/B12/B13, display CN2, triode Q2; Under the control of CPU processor U1, shown and charging voltage in charging pile reciprocal process by display CN2, electric current, CC state, the frequency of CP, duty ratio, amplitude, and test result;
Further improvement, described CP testing circuit comprises transistor D15/D16, inductance B4, resistance R2, control switch SW1; Under the control of CPU processor U1, by transistor D15/D16, the mating reaction of inductance B4, resistance R2, control switch SW1 realizes the detection of CP signal, exports CP+ signal, CP-signal;
Further improvement, described PWM testing circuit comprises CP+ signal deteching circuit, CP-signal deteching circuit; Described CP+ signal deteching circuit comprises amplifier U3A, resistance R404/R405/R401, electric capacity C109/C209; Described CP-signal deteching circuit comprises amplifier U4A/U401A, resistance R410/R41/R407/R408; By realizing the detection of frequency to CP+, CP-and duty ratio to the detection of CP+ signal, CP-signal;
Compared with prior art, adopt such scheme, the invention has the beneficial effects as follows: the present invention has the following advantages: (1), by CC, the power of charge cable can be detected; (2) frequency of the PWM of charging pile can be detected by CP, duty ratio, amplitude, and give display and result of determination; (3), the duty ratio of stake end PWM detected, control load power overloads, the overcurrent protection function of inspection charging pile; (4), change the relevant resistance value of CP, to CP value, test charging pile judges whether interval value meets GB, and provide result; (5) the electric current and voltage value in charging process can be tested, for reference; (6), can simulated automotive anomaly, judge whether charging pile can detect and process; (7), defencive function is complete: overvoltage protection, under-voltage protection, overcurrent protection, overheat protector, over-charge protective; Particularly charging inlet place possesses overheat protector, can eliminate safe hidden trouble; (8), system automatically and manual test function.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present invention;
Fig. 2 is CPU treatment system Part I circuit theory diagrams in the present invention;
Fig. 3 is CPU treatment system Part II circuit theory diagrams in the present invention;
Fig. 4 is the circuit theory diagrams of auxiliary power circuit in the present invention;
Fig. 5 is the circuit theory diagrams of power switch circuit in the present invention;
Fig. 6 is the circuit theory diagrams of car end charging inlet circuit in the present invention;
Fig. 7 is the circuit theory diagrams of CC testing circuit in the present invention;
Fig. 8 is the circuit theory diagrams of programme control circut in the present invention;
Fig. 9 is the circuit theory diagrams of meter circuit in the present invention;
Figure 10 is the circuit theory diagrams of indicator light circuit in the present invention;
Figure 11 is the circuit theory diagrams of LCD display in the present invention;
Figure 12 is the circuit theory diagrams of CP testing circuit in the present invention;
Figure 13 is the circuit theory diagrams of PWM testing circuit in the present invention;
Figure 14 is workflow diagram of the present invention;
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figure 1, an intelligent detection device for electric vehicle alternating-current charging pile, comprises CPU treatment system, LCD display, auxiliary power circuit, power switch circuit, key circuit, car end charging inlet circuit, CC testing circuit, CP testing circuit, indicator light circuit, PWM testing circuit, programme control circut, meter circuit; Wherein, described CPU treatment system, for having controlled charging flow, and relevant signals collecting and protection act; Can program control regulating load size, whether test out charging pile has overcurrent protection function etc.; Described LCD display, for showing the signal message and test result that detect; Described auxiliary power circuit, for realizing the conversion of+5V to+3.3V, provides operating voltage to CPU treatment system; Whether described power switch circuit, press for sense switch, is communicated with different power supplys; Whether described key circuit, press for sense switch; Whether described car end charging inlet circuit, receive the output of electrical source of power, electrical source of power signal be converted to Transistor-Transistor Logic level signal and facilitate CPU to detect for inspection vehicle end; Described CC testing circuit, for detecting CC signal; Described CP testing circuit, for detecting CP signal; Whether described indicator light circuit, pass through for pointing out test; Described PWM testing circuit, detects the frequency of CP+, CP-and duty ratio for realization; Described programme control circut, for automatically loading the load of certain current value, analog charge; Described meter circuit, for detecting the electric current and voltage value that charging pile exports;
As shown in Figure 2 and Figure 3, CPU processor U1 is provided with in described CPU treatment system; 37 pin of described CPU processor U1 are connected with a resistance R108; One pin of described resistance R108 is connected with 37 pin of described CPU processor U1, another pin ground connection;
55 pin of described CPU processor U1 are connected with described auxiliary power circuit; 15 ~ 18 pin of described CPU processor U1 are connected with described power switch circuit, key circuit respectively; 29 pin of described CPU processor U1 are connected with described car end charging inlet circuit; 65 pin of described CPU processor U1 are connected with described CC testing circuit; 47 pin of described CPU processor U1,48 pin, 51 pin are connected with described meter circuit; 25 ~ 26 pin of described CPU processor U1 are connected with described programme control circut; 23 ~ 24 pin, 67 pin of described CPU processor U1 are connected with described PWM testing circuit; 33 ~ 34 pin, 63 ~ 64 pin of described CPU processor U1 are connected with described indicator light circuit; 56 pin of described CPU processor U1 are connected with described CP testing circuit; 78 ~ 88 pin of described CPU processor U1 are connected with described LCD display;
Preferably, described CPU processor U1 adopts model to be the microprocessor of STM32F103VET6; The resistance of described resistance R108 is 10K Ω;
Described CPU processor U1 be integrated with automobile control guide PWM waveshape detector, can with the frequency of simulating vehicle to the PWM waveform of charging pile, duty ratio, amplitude;
For simulating the CC of car end in GB20234.2, CP function, controls whole equipment simultaneously and runs and simulated automotive charging process, automatically can detect the interface parameters of alternating-current charging pile, and control to guide index, charging flow is to mistake; Can program control regulating load size, whether test out charging pile has overcurrent protection function etc.;
As shown in Figure 4, described auxiliary power circuit comprises four filter circuits, is respectively the first filter circuit, the second filter circuit, the 3rd filter circuit, the 4th filter circuit; Voltage-stabiliser tube U3, display circuit and Wiring port J10;
Preferably, described voltage-stabiliser tube U3 adopts model to be the pressurizer of AZ1117D-3.3; It exports termination+5V voltage, and output exports+3.3V voltage; The output of described voltage-stabiliser tube U3 is connected with 55 pin of described CPU processor U1;
Preferably, 1 pin of described Wiring port J10 connects+5V voltage; 2 pin of described Wiring port J10 connect+12V voltage; 3 pin of described Wiring port J10 connect-12V voltage; The 4 pin ground connection of described Wiring port J10;
Preferably, described Wiring port J10 adopts specification to be the Wiring port of 3.96mm-4;
Described first filter circuit comprises electric capacity C52, C53, C57; In parallel with the positive pole of electric capacity C57 again after one pin of described electric capacity C52 is in parallel with a pin of electric capacity C53, finally access 3 pin of voltage-stabiliser tube U3; 3 pin of described voltage-stabiliser tube U3 are connected with 1 pin of described Wiring port J10; In parallel with the negative pole of electric capacity C57 again after another pin of described electric capacity C52 is in parallel with another pin of electric capacity C53, finally access 1 pin of voltage-stabiliser tube U3; The 1 pin ground connection of described voltage-stabiliser tube U3;
Preferably, the capacitance of described electric capacity C52 is 100nF; The capacitance of described electric capacity C53 is 1000pF; The capacitance of described electric capacity C57 is 220uF, and voltage is 16V;
Described second filter circuit comprises electric capacity C54, C55, C56, C58; One pin of the described electric capacity C54 respectively pin of described C55, the positive pole of electric capacity C56, the positive pole parallel connection of electric capacity C58 accesses 2 pin of voltage-stabiliser tube U3 afterwards; 2 pin of described voltage-stabiliser tube U3 export 3.3V voltage;
Preferably, the capacitance of described electric capacity C54 is 100nF; The capacitance of described electric capacity C55 is 1000pF; The capacitance of described electric capacity C56 is 220uF, and voltage is 16V; The capacitance of described electric capacity C58 is 4700uF, and voltage is 6.3V;
Described 3rd filter circuit comprises electric capacity C63, C60, C65; In parallel with the negative pole of electric capacity C65 again after one pin of described electric capacity C63 is in parallel with a pin of electric capacity C60, finally access 3 pin of Wiring port J10; In parallel with the positive pole of electric capacity C65 again after another pin of described electric capacity C63 is in parallel with another pin of electric capacity C60, last ground connection;
Preferably, the capacitance of described electric capacity C63 is 100nF; The capacitance of described electric capacity C60 is 1000pF; The capacitance of described electric capacity C65 is 330uF, and voltage is 25V;
Described 4th filter circuit comprises electric capacity C61, C62, C64; In parallel with the positive pole of electric capacity C64 again after one pin of described electric capacity C61 is in parallel with a pin of electric capacity C62, finally access 2 pin of Wiring port J10; In parallel with the negative pole of electric capacity C64 again after another pin of described electric capacity C61 is in parallel with another pin of electric capacity C62, last ground connection;
Preferably, the capacitance of described electric capacity C61 is 100nF; The capacitance of described electric capacity C62 is 1000pF; The capacitance of described electric capacity C64 is 330uF, and voltage is 25V;
Described display circuit comprises diode D11, resistance R68; The negative pole of described diode D11 is connected with 1 pin of Wiring port J10; The positive pole of described diode D11 is connected with a pin of described resistance R68, another pin ground connection of described resistance R68;
Preferably, described diode D11 is light-emitting diode;
Preferably, the resistance of described resistance R68 is 510 Ω;
+ 5V electricity, for realizing the conversion of power supply, is converted to 3.3V by described auxiliary power circuit, provides required power supply to CPU treatment system and other components and parts;
As shown in Figure 5, described power switch circuit comprises switch S 1/S2/S3/S4, resistance R201/R202/R203/R204, electric capacity C201/C202/C203/C204;
The input of described switch S 1 is connected with 15 pin of described CPU processor U1; The input of described switch S 2 is connected with 16 pin of described CPU processor U1; The input of described switch S 3 is connected with 17 pin of described CPU processor U1; The input of described switch S 4 is connected with 18 pin of described CPU processor U1;
The one pin access 3.3V voltage of described resistance R201; After another pin of described resistance R201 is in parallel with a pin of described electric capacity C201, then be connected with the input of described switch S 1; Another pin ground connection of described electric capacity C201;
The one pin access 3.3V voltage of described resistance R202; After another pin of described resistance R202 is in parallel with a pin of described electric capacity C202, then be connected with the input of described switch S 2; Another pin ground connection of described electric capacity C202;
The one pin access 3.3V voltage of described resistance R203; After another pin of described resistance R203 is in parallel with a pin of described electric capacity C203, then be connected with the input of described switch S 3; Another pin ground connection of described electric capacity C203;
The one pin access 3.3V voltage of described resistance R204; After another pin of described resistance R204 is in parallel with a pin of described electric capacity C204, then be connected with the input of described switch S 4; Another pin ground connection of described electric capacity C204;
Preferably, the capacitance of described electric capacity C201/C202/C203/C204 is 1000pF;
Preferably, the resistance of described resistance R201/R202/R203/R204 is 10K Ω;
Whether described power switch circuit, press for sense switch, the power supply that UNICOM is different;
Further, the circuit structure of described key circuit is identical with the circuit structure of described power switch circuit, so be not repeated;
Described key circuit can realize manually simulating car end CC and CP different conditions; Whether press for sense switch;
As shown in Figure 6, described car end charging inlet circuit comprises rectifier D501, optical coupler U501, resistance R502/R503, electric capacity C501; 4 pin of described rectifier D501 connect high level; 2 pin of described rectifier D501 connect low level; 3 pin of described rectifier D501 are connected with 1 pin of described optical coupler U501, a pin of electric capacity C501 respectively; 1 pin of described optical coupler U501 is connected with a pin of described resistance R502; After another pin of described resistance R502 is in parallel with another pin of described electric capacity C501, then be connected with 1 pin of described rectifier D501; 4 pin of described optical coupler U501 are connected with a pin of described resistance R503,29 pin of described CPU processor U1 respectively; Another pin access+5V voltage of described resistance R503; The 3 pin ground connection of described optical coupler U501;
Preferably, described electric capacity C501 is electrochemical capacitor, and its capacitance is 40uF;
Preferably, the resistance of described resistance R502/R503 is 1K Ω;
Preferably, described rectifier D501 adopts model to be the rectifier of MB4S;
Whether described car end charging inlet circuit, receive the output of electrical source of power, electrical source of power signal be converted to Transistor-Transistor Logic level signal and facilitate CPU to detect for inspection vehicle end;
As shown in Figure 7, described CC testing circuit comprises amplifier U1A; Resistance R15/R16/R19/R20/R22/R23, electric capacity C19/C20/C22/C23;
The one pin access+12V voltage of described resistance R15; Another pin access CC1 signal of described resistance R15; Another pin of described resistance R15 is in parallel with a pin of described resistance R20; Another pin of described resistance R20 is connected with 3 pin of described amplifier U1A respectively with after a pin parallel connection of the pin of described resistance R22, electric capacity C23; Ground connection after another pin of described resistance R22 is in parallel with another pin of described electric capacity C23; The one pin access+12V voltage of described resistance R16; Another pin of described resistance R16 is connected with a pin of 2 pin of described amplifier U1A, described resistance R23, a pin of described electric capacity C22 respectively; Ground connection after another pin of described resistance R23 is in parallel with another pin of described electric capacity C22;
The 8 pin access+12V voltages of described amplifier U1A; The 4 pin ground connection of described amplifier U1A; 1 pin of described amplifier U1A is connected with a pin of described resistance R19,65 pin of described CPU processor U1 respectively; Another pin access 3.3V voltage of described resistance R19;
One pin of described electric capacity C19 8 pin that afterwards access amplifier U1A in parallel with a pin of electric capacity C20; Ground connection after another pin of described electric capacity C19 is in parallel with another pin of electric capacity C20;
Preferably, described amplifier U1A adopts model to be the amplifier of LM2903D;
Preferably, the resistance of described resistance R15 is 12K Ω; The resistance of described resistance R20 is 300K Ω; The resistance of described resistance R22 is 100K Ω; The resistance of described resistance R16 is 47K Ω; The resistance of described resistance R23 is 10K Ω; The resistance of described resistance R19 is 3.3K Ω;
Preferably, the capacitance of described electric capacity C23 is 1000pF; The capacitance of described electric capacity C19, C22 is 100nF; The capacitance of described electric capacity C20 is 10uF, and voltage is 25V;
Described CC testing circuit, for detecting CC signal;
As shown in Figure 8, described programme control circut comprises communication chip U6, electric capacity C33/C34/C36/C37/C31/C32/C29/C30; , Wiring port J5;
1 pin of described communication chip U6 is connected with a pin of described electric capacity C34; Another pin of described electric capacity C34 is connected with 3 pin of described communication chip U6; 4 pin of described communication chip U6 are connected with a pin of described electric capacity C37; Another pin of described electric capacity C37 is connected with 35 pin of described communication chip U6; 11 pin of described communication chip U6 are connected with 25 pin of described CPU processor U1; 12 pin of described communication chip U6 are connected with 26 pin of CPU processor U1; 2 pin of described communication chip U6 are connected with a pin of described electric capacity C33; Ground connection after another pin of described electric capacity C33 is in parallel with a pin of electric capacity C36; Another pin of described electric capacity C36 is connected with 6 pin of described communication chip U6; The 16 pin access 3.3V voltages of described communication chip U6; The 15 pin ground connection of described communication chip U6; 14 pin of described communication chip U6 are connected with 2 pin of described Wiring port J5; 13 pin of described communication chip U6 are connected with 3 pin of described Wiring port J5;
+ 5V voltage is accessed after one pin of described electric capacity C31 is in parallel with a pin of electric capacity C32; Ground connection after another pin of described electric capacity C31 is in parallel with another pin of electric capacity C32; 3.3V voltage is accessed after one pin of described electric capacity C29 is in parallel with a pin of electric capacity C30; Ground connection after another pin of described electric capacity C29 is in parallel with another pin of electric capacity C30;
Preferably, described communication chip U6 adopts model to be the card reader of ADM3202ARU-REEL;
Preferably, Wiring port J5 adopts specification to be the Wiring port of 2.5mm-8;
Preferably, the capacitance of electric capacity C33/C34/C36/C37/C29/C32 is 100nF;
Preferably, the capacitance of electric capacity C30 is 10uF, and voltage is 10V; The capacitance of electric capacity C31 is 220uF, and voltage is 16V;
Described programme control circut can simulate the different charge powers of car end; Serial line interface and the program control load of ancillary equipment operate program control load alternately;
As shown in Figure 9, described meter circuit comprises ammeter chip U8, resistance R41/R42/R44;
1 pin of described ammeter chip U8 is connected with 48 pin of described CPU processor U1; 2 pin, 3 pin of described ammeter chip U8 are connected with 51 pin of described CPU processor U1; 4 pin of described ammeter chip U8 are connected with 47 pin of described CPU processor U1; 1 pin of described ammeter chip U8 is also connected with a pin of described resistance R42; Another pin access 3.3V voltage of described resistance R42; The 8 pin access 3.3V voltages of described ammeter chip U8; 7 pin of described ammeter chip U8 export METER1_485B signal; 6 pin of described ammeter chip U8 export METER1_485A signal; 6 pin of described ammeter chip U8,7 pin realize RS485 communication; 7 pin of described ammeter chip U8 are also connected with a pin of resistance R41, a pin of resistance R44 respectively; Another pin of described resistance R41 is connected with 6 pin of described ammeter chip U8; Another pin of described resistance R44 is connected with 5 pin of described ammeter chip U8; The 5 pin ground connection of described ammeter chip U8;
Preferably, described ammeter chip U8 employing model is the ammeter chip of SN65HVD72D;
Preferably, the resistance of described resistance R42, R44 is 4.7K Ω;
Preferably, the resistance of described resistance R41 is 120K Ω;
Described meter circuit exactly for metering and billing provides data, can operate ammeter by serial line interface and ancillary equipment ammeter alternately;
As shown in Figure 10, described indicator light circuit comprises resistance R205/R206/R207/R208, light-emitting diode D202/D203/D204/D205;
The negative pole of described light-emitting diode D202 is connected with 33 pin of described CPU processor U1; The positive pole of described light-emitting diode D202 is connected with a pin of described resistance R205; Another pin ground connection of described resistance R205;
The negative pole of described light-emitting diode D203 is connected with 34 pin of described CPU processor U1; The positive pole of described light-emitting diode D203 is connected with a pin of described resistance R206; Another pin ground connection of described resistance R206;
The negative pole of described light-emitting diode D204 is connected with 63 pin of described CPU processor U1; The positive pole of described light-emitting diode D204 is connected with a pin of described resistance R207; Another pin ground connection of described resistance R207;
The negative pole of described light-emitting diode D205 is connected with 64 pin of described CPU processor U1; The positive pole of described light-emitting diode D205 is connected with a pin of described resistance R208; Another pin ground connection of described resistance R208;
Preferably, the resistance of described resistance R205/R206/R207/R208 is 470 Ω;
Described indicator light is used to indicate the state of equipment and charging;
As shown in figure 11, described LCD display comprises resistance R50/R51, adjustable resistance RX1, electric capacity C50, inductance B1/B2/B3/B6/B7/B8/B9/B10/B11/B12/B13, display CN2, triode Q2;
1 pin of described adjustable resistance RX1 is connected with 15 pin of described display CN2,17 pin; 15 pin, 17 pin of described display CN2 all access+5V voltage; The 2 pin ground connection of described adjustable resistance RX1; 3 pin of described adjustable resistance RX1 are connected with 3 pin of described display CN2; The 1 pin ground connection of described display CN2, and be connected with a pin of described electric capacity C50; The 2 pin access+5V voltages of described display CN2, and be connected with another pin of described electric capacity C50;
One pin of described inductance B1 is connected with 78 pin of described CPU processor U1; Another pin of described inductance B1 is connected with 4 pin of described display CN2;
One pin of described inductance B2 is connected with 79 pin of described CPU processor U1; Another pin of described inductance B2 is connected with 5 pin of described display CN2;
One pin of described inductance B3 is connected with 80 pin of described CPU processor U1; Another pin of described inductance B3 is connected with 6 pin of described display CN2;
One pin of described inductance B13 is connected with 81 pin of described CPU processor U1; Another pin of described inductance B13 is connected with 7 pin of described display CN2;
One pin of described inductance B12 is connected with 82 pin of described CPU processor U1; Another pin of described inductance B12 is connected with 8 pin of described display CN2;
One pin of described inductance B11 is connected with 83 pin of described CPU processor U1; Another pin of described inductance B11 is connected with 9 pin of described display CN2;
One pin of described inductance B10 is connected with 84 pin of described CPU processor U1; Another pin of described inductance B10 is connected with 10 pin of described display CN2;
One pin of described inductance B9 is connected with 85 pin of described CPU processor U1; Another pin of described inductance B9 is connected with 11 pin of described display CN2;
One pin of described inductance B8 is connected with 86 pin of described CPU processor U1; Another pin of described inductance B8 is connected with 12 pin of described display CN2;
One pin of described inductance B7 is connected with 87 pin of described CPU processor U1; Another pin of described inductance B7 is connected with 13 pin of described display CN2;
One pin of described inductance B6 is connected with 88 pin of described CPU processor U1; Another pin of described inductance B6 is connected with 14 pin of described display CN2;
One pin of described resistance R50 is connected with 6 pin of described display CN2; Another pin of described resistance R50 is connected with the base stage of described triode Q2; The emitter of described triode Q2 is connected with 19 pin of described display CN2, a pin of described resistance R51 respectively; The 20 pin ground connection of described display CN2; Another pin ground connection of described resistance R51;
Preferably, the resistance of described resistance R50 is 1K Ω; The resistance of described resistance R51 is 100 Ω;
Preferably, the resistance of described adjustable resistance RX1 is 10K Ω;
Preferably, the capacitance of described electric capacity C50 is 0.1pF;
Preferably, the resistance of described inductance B1/B2/B3/B6/B7/B8/B9/B10/B11/B12/B13 is 470 Ω;
Preferably, described triode Q2 is NPN type triode;
Preferably, described display CN2 adopts model to be the display of WSM12864-2ZK;
Described LCD display is used for display and charging voltage in charging pile reciprocal process, electric current, CC state, the frequency of CP, duty ratio, amplitude, and test result;
As shown in figure 12, described CP testing circuit comprises transistor D15/D16, inductance B4, resistance R2, control switch SW1;
One pin of described inductance B4 is connected with 56 pin of described CPU processor U1; Another pin of described inductance B4 respectively with 1 pin, 2 pin of described transistor D15,3 pin of described transistor D16 are connected; 3 pin of described transistor D15 are connected with a pin of described resistance R2,2 pin of control switch SW1 respectively; 2 pin of described control switch SW1 export CP+ signal; Another pin of described resistance R2 is connected with 1 pin of described control switch SW1; 1 pin, 2 pin of described transistor D16 export CP-signal; 3 pin of described control switch SW1,4 pin ground connection;
Preferably, described transistor D15/D16 all adopts model to be the transistor of BAG70LTIG;
Preferably, the resistance of described resistance R2 is 1.3K Ω;
Preferably, the resistance of described inductance B4 is 470 Ω;
Described CP testing circuit, for detecting CP signal, exports CP+ signal, CP-signal;
As shown in figure 13, described PWM testing circuit comprises CP+ signal deteching circuit, CP-signal deteching circuit;
Described CP+ signal deteching circuit comprises amplifier U3A, resistance R404/R405/R401, electric capacity C109/C209;
One pin of described resistance R404 connects the CP+ signal exported in CP testing circuit, and another pin of described resistance R404 is connected with 3 pin of described amplifier U3A with after a pin parallel connection of described resistance R405 again; Another pin ground connection of described resistance R405; 2 pin of described amplifier U3A are connected with 1 pin of described amplifier U3A; The 4 pin ground connection of described amplifier U3A; The 8 pin access+12V voltages of described amplifier U3A; One pin of described resistance R401 is connected with 1 pin of described amplifier U3A; 1 pin of described amplifier U3A is connected with 67 pin of described CPU processor U1; Another pin of described resistance R401 is connected with 24 pin of described CPU processor U1;
+ 12V voltage is accessed after one pin of described electric capacity C109 is in parallel with a pin of electric capacity C209; Ground connection after another pin of described electric capacity C109 is in parallel with another pin of electric capacity C209;
Preferably, described amplifier U3A adopts model to be the amplifier of AS358M-E1;
Preferably, the resistance of described resistance R404 is 70K Ω; The resistance of described resistance R405 is 50K Ω; The resistance of described resistance R401 is 1K Ω;
Preferably, the capacitance of electric capacity C109 is 100nF; The capacitance of described electric capacity C209 is 10uF, and voltage is 25V;
Described CP-signal deteching circuit comprises amplifier U4A/U401A, resistance R410/R41/R407/R408;
One pin of described resistance R410 connects the CP-signal exported in CP testing circuit, and another pin of described resistance R410 is connected with 2 pin of described amplifier U401A; 2 pin of described amplifier U401A are connected with a pin of described resistance R41; Another pin of described resistance R41 is connected with 1 pin of described amplifier U401A; 3 pin of described amplifier U401A, 4 pin ground connection; The 8 pin access+12V voltages of described amplifier U401A; One pin of described resistance R407 is connected with 1 pin of described amplifier U401A; Another pin of described resistance R407 is connected with 3 pin of described amplifier U4A with after a pin parallel connection of described resistance R408 again; Another pin ground connection of described resistance R408; 2 pin of described amplifier U4A are connected with 1 pin of described amplifier U4A; The 4 pin ground connection of described amplifier U4A; The 8 pin access+12V voltages of described amplifier U4A; 1 pin of described amplifier U4A is connected with 23 pin of described CPU processor U1;
Preferably, described amplifier U401A, U4A all adopt model to be the amplifier of AS358M-E1;
Preferably, the resistance of described resistance R410, R407, R41 is 70K Ω; The resistance of described resistance R408 is 50K Ω;
Described PWM testing circuit, for realizing the frequency of CP+, CP-and the detection of duty ratio;
As shown in figure 14, specific works flow process: charging pile and checkout gear (the present invention) are linked together by the charging chain wiring of GB, first this checkout gear detects the access of CC signal, judge that the maximum of cable bears electric current 1, then the dohandshake action of this checkout gear simulated automotive, guide charging pile until the output of CP signal, this checkout gear detects the duty when amplitude of charging pile CP signal, judge the maximum exportable electric current 2 of charging pile, and by the information displaying that detects on a display screen; According to the value of electric current 1 and electric current 2, judge minimum electric current 3, then control program control load and load, control its electric current and be slightly less than electric current; Also to detect in this process and need to complete within 3 seconds when the CP voltage time difference changed to by 9V required for the 6V moment to the large alternating current of load-receipt.It is more than normal processes;
Except normal flow also needs to test abnormal flow process; Particular content is as follows:
1), abnormal flow process 1: in the process charged normal, CP is switched to 9V by 6V by this checkout gear, and charging pile needs can stop rapidly exporting, and the time needed to be limited within 1 second;
2), abnormal flow process 2: connect, after stopping exporting, PC is become 6V from 9V by this checkout gear again, and charging pile can continue in time and fills, and it is qualified so repeatedly all to need for 3 times;
3), abnormal flow process 3: overcurrent protection is tested, in charging process, slow increase measuring current, when being increased to 1.1 times slightly larger than rated current, charging pile can stop exporting within 10 seconds, and remove PWM waveform, change+12V into and power, this checkout gear needs to detect this process; More than test and all pass through, charging pile interface testing can be judged to and pass through;
What the present invention will set forth might not realize according to flow process above, also can revise accordingly according to different customer demand customization;
The present invention has the following advantages: (1), by CC, can detect the power of charge cable; (2) frequency of the PWM of charging pile can be detected by CP, duty ratio, amplitude, and give display and result of determination; (3), the duty ratio of stake end PWM detected, control load power overloads, the overcurrent protection function of inspection charging pile; (4), change the relevant resistance value of CP, to CP value, test charging pile judges whether interval value meets GB, and provide result; (5) the electric current and voltage value in charging process can be tested, for reference; (6), can simulated automotive anomaly, judge whether charging pile can detect and process; (7), defencive function is complete: overvoltage protection, under-voltage protection, overcurrent protection, overheat protector, over-charge protective; Particularly charging inlet place possesses overheat protector, can eliminate safe hidden trouble; (8), system automatically and manual test function;
The present invention is not limited to above-mentioned concrete execution mode, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, done all conversion, all drop within protection scope of the present invention.
Claims (9)
1. an intelligent detection device for electric vehicle alternating-current charging pile, is characterized in that: comprise CPU treatment system, LCD display, auxiliary power circuit, power switch circuit, key circuit, car end charging inlet circuit, CC testing circuit, CP testing circuit, indicator light circuit, PWM testing circuit, programme control circut, meter circuit; Wherein, described CPU treatment system, for having controlled charging flow, and relevant signals collecting and protection act; Can program control regulating load size, whether test out charging pile has overcurrent protection function etc.; Described LCD display, for showing the signal message and test result that detect; Described auxiliary power circuit, for realizing the conversion of+5V to+3.3V, provides operating voltage to CPU treatment system; Whether described power switch circuit, press for sense switch, is communicated with different power supplys; Whether described key circuit, press for sense switch; Whether described car end charging inlet circuit, receive the output of electrical source of power, electrical source of power signal be converted to Transistor-Transistor Logic level signal and facilitate CPU to detect for inspection vehicle end; Described CC testing circuit, for detecting CC signal; Described CP testing circuit, for detecting CP signal; Whether described indicator light circuit, pass through for pointing out test; Described PWM testing circuit, detects the frequency of CP+, CP-and duty ratio for realization; Described programme control circut, for automatically loading the load of certain current value, analog charge; Described meter circuit, for detecting the electric current and voltage value that charging pile exports;
CPU processor U1 is provided with in described CPU treatment system; 37 pin of described CPU processor U1 are connected with a resistance R108; 55 pin of described CPU processor U1 are connected with described auxiliary power circuit; 15 ~ 18 pin of described CPU processor U1 are connected with described power switch circuit, key circuit respectively; 29 pin of described CPU processor U1 are connected with described car end charging inlet circuit; 65 pin of described CPU processor U1 are connected with described CC testing circuit; 47 pin of described CPU processor U1,48 pin, 51 pin are connected with described meter circuit; 25 ~ 26 pin of described CPU processor U1 are connected with described programme control circut; 23 ~ 24 pin, 67 pin of described CPU processor U1 are connected with described PWM testing circuit; 33 ~ 34 pin, 63 ~ 64 pin of described CPU processor U1 are connected with described indicator light circuit; 56 pin of described CPU processor U1 are connected with described CP testing circuit; 78 ~ 88 pin of described CPU processor U1 are connected with described LCD display.
2. the intelligent detection device of a kind of electric vehicle alternating-current charging pile according to claim 1, is characterized in that: be provided with four switches in described power switch circuit, is respectively switch S 1, switch S 2, switch S 3, switch S 4; Under the control of CPU processor U1, by the break-make of these four switch S 1, S2, S3, S4, realize the inspection of whether UNICOM's power supply; Described power switch circuit is identical with the circuit structure of described key circuit.
3. the intelligent detection device of a kind of electric vehicle alternating-current charging pile according to claim 1, is characterized in that: described car end charging inlet circuit comprises rectifier D501, optical coupler U501, resistance R502/R503, electric capacity C501; Under the control of CPU processor U1, realize car end by the acting in conjunction of rectifier D501, optical coupler U501 and surrounding resistance R502/R503, electric capacity C501 and whether receive the inspection that electrical source of power exports; Meanwhile, electrical source of power signal being converted to Transistor-Transistor Logic level signal facilitates CPU to detect.
4. the intelligent detection device of a kind of electric vehicle alternating-current charging pile according to claim 1, is characterized in that: described CC testing circuit comprises amplifier U1A, resistance R15/R16/R19/R20/R22/R23, electric capacity C19/C20/C22/C23; Under the control of CPU processor U1, by amplifier U1A and the resistance R15/R16/R19/R20/R22/R23 of surrounding, the common mating reaction of electric capacity C19/C20/C22/C23, realize the inspection of CC signal.
5. the intelligent detection device of a kind of electric vehicle alternating-current charging pile according to claim 1, is characterized in that: described meter circuit comprises ammeter chip U8, resistance R41/R42/R44; Under the control of CPU processor U1, under the mating reaction by load resistance R41/R42/R44 around ammeter chip U8, realize exactly for metering and billing provides data, operate ammeter alternately by serial line interface and ancillary equipment ammeter.
6. the intelligent detection device of a kind of electric vehicle alternating-current charging pile according to claim 1, is characterized in that: described indicator light circuit comprises resistance R205/R206/R207/R208, light-emitting diode D202/D203/D204/D205; Under the control of CPU processor U1, realized the state of indicating equipment and charging by light-emitting diode D202/D203/D204/D205.
7. the intelligent detection device of a kind of electric vehicle alternating-current charging pile according to claim 1, is characterized in that: described LCD display comprises resistance R50/R51, inductance B1/B2/B3/B6/B7/B8/B9/B10/B11/B12/B13, adjustable resistance RX1, electric capacity C50, display CN2, triode Q2; Under the control of CPU processor U1, shown and charging voltage in charging pile reciprocal process by display CN2, electric current, CC state, the frequency of CP, duty ratio, amplitude, and test result.
8. the intelligent detection device of a kind of electric vehicle alternating-current charging pile according to claim 1, is characterized in that: described CP testing circuit comprises transistor D15/D16, inductance B4, resistance R2, control switch SW1; Under the control of CPU processor U1, by transistor D15/D16, the mating reaction of inductance B4, resistance R2, control switch SW1 realizes the detection of CP signal.
9. the intelligent detection device of a kind of electric vehicle alternating-current charging pile according to claim 1, is characterized in that: described PWM testing circuit comprises CP+ signal deteching circuit, CP-signal deteching circuit;
Described CP+ signal deteching circuit comprises amplifier U3A, resistance R404/R405/R401, electric capacity C109/C209; Described CP-signal deteching circuit comprises amplifier U4A/U401A, resistance R410/R41/R407/R408; By realizing the detection of frequency to CP+, CP-and duty ratio to the detection of CP+ signal, CP-signal.
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| CN108445425A (en) * | 2018-03-06 | 2018-08-24 | 安徽卓越动力科技有限公司 | A kind of charging intelligent detection device |
| CN109975583A (en) * | 2019-03-28 | 2019-07-05 | 浙江华云清洁能源有限公司 | A kind of interface equipment for alternating-current charging pile test |
| CN111060737A (en) * | 2019-12-30 | 2020-04-24 | 重庆国翰能源发展有限公司 | Monitoring system of four-pile charging pile system |
| CN114019945A (en) * | 2021-11-08 | 2022-02-08 | 国网北京市电力公司 | Charging control unit testing device and method |
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| CN105375572B (en) | 2018-04-24 |
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