CN113009245A - Fill portable detecting system of electric pile - Google Patents
Fill portable detecting system of electric pile Download PDFInfo
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- CN113009245A CN113009245A CN201911329577.6A CN201911329577A CN113009245A CN 113009245 A CN113009245 A CN 113009245A CN 201911329577 A CN201911329577 A CN 201911329577A CN 113009245 A CN113009245 A CN 113009245A
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Abstract
The invention relates to a mobile detection system for a charging pile, and belongs to the field of charging pile testing devices. The system comprises a three-phase voltage regulator, a charging simulation device, a charging interface circuit simulator, a parameter collector and an industrial personal computer, wherein the charging simulation device comprises a BMS simulator, an energy storage battery system and a direct current load; the industrial computer is used for judging the electric pile performance of being filled. The method adopts a three-phase voltage regulator to simulate the state of a power grid, and an industrial personal computer controls an energy storage battery system to discharge to a direct current load according to the requirement during testing, so that the terminal voltage of the energy storage battery system is adjusted, and the terminal voltage of the actual charging state of the battery of the electric automobile is simulated; utilize BMS simulator simulation electric automobile charging in-process BMS and fill the communication interaction between the electric pile, realize the communication function test to filling electric pile, improve the test accuracy who fills electric pile.
Description
Technical Field
The invention belongs to the field of charging pile testing devices, and particularly relates to a mobile detection system for a charging pile.
Background
The existing mobile detection system for charging piles needs to be provided with electric automobile charging simulation equipment in the detection system for realizing the test of the charging piles, and is used for simulating the charging process of the charging piles to the electric automobile charging equipment during the test. In the prior art, a direct current resistive load (i.e., a direct current load) or a direct current power supply is usually selected as electric vehicle charging simulation equipment, the resistance of an electric vehicle battery is directly simulated through the direct current resistive load, and voltages at two ends of the electric vehicle battery are directly simulated through the direct current power supply; however, when the electric vehicle is actually charged, the voltages at the two ends of the battery are not fixed, so the charging pile can be charged according to any detected voltage, but the existing charging pile mobile detection system can only realize a single-end voltage charging test of a simulation battery, and the charging simulation equipment is inconsistent with the actual state of the battery of the electric vehicle, so that the test result of the charging pile is inaccurate.
At present, although a movable charging pile detection vehicle is provided, so that the performance of a charging pile can be conveniently detected on site, the problem that electric energy output by the charging pile during detection cannot be utilized exists, and energy waste is caused; moreover, some charging stations are built in meteorological areas with severe environments, lines in the areas are prone to icing, pole towers collapse and line disconnection are caused, power supply of users is seriously affected, and huge loss is caused.
Disclosure of Invention
The invention aims to provide a mobile detection system for a charging pile, which is used for solving the problem that the test result of the charging pile in the prior art is inaccurate.
Based on the purpose, the technical scheme for inaccurate test result of the charging pile is as follows:
the detection system comprises:
the three-phase voltage regulator is used for connecting the alternating current input end of the charging pile to be tested and adjusting the alternating current power supply of the charging pile to be tested;
the charging simulation equipment comprises a BMS simulator, an energy storage battery system and a direct current load, wherein the energy storage battery system is used for discharging to the direct current load so as to adjust the terminal voltage of the energy storage battery system and realize the simulation of the actual charging state of the battery of the electric vehicle; the direct current load is used for simulating the internal resistance of the battery of the electric automobile; the BMS simulator is used for sending a communication signal to the tested charging pile;
the charging interface circuit simulator comprises a charging pile interface, a direct current output interface and a communication interface, wherein the charging pile interface is used for connecting a charging pile to be tested, the direct current output interface is used for connecting the energy storage battery system and a direct current load, and the communication interface is connected with the BMS simulator;
the parameter acquisition device is used for acquiring the output voltage and current of the three-phase voltage regulator and acquiring the charging voltage and current of the charging simulation equipment;
the industrial computer, the industrial computer is communication connection respectively three-phase voltage regulator, the interface circuit simulator that charges, BMS simulator and parameter acquisition device, the industrial computer is used for judging the performance of the electric pile that fills of being surveyed according to the data that parameter acquisition device sent.
The beneficial effects of the above technical scheme are:
according to the mobile detection system for the charging pile, the working state of a power grid is simulated by adopting a three-phase voltage regulator, and the working state is used as alternating current input of the charging pile; the method comprises the following steps that a direct-current load and an energy storage battery system are adopted, and a BMS simulator is combined to form electric automobile charging simulation equipment, and an industrial personal computer is used for controlling the energy storage battery system to discharge to the direct-current load and adjusting the terminal voltage of the energy storage battery system according to the requirement during testing and is used for simulating the terminal voltage of the actual charging state of the electric automobile battery; meanwhile, the BMS simulator is used for simulating communication interaction between the BMS and the charging pile in the charging process of the electric automobile, so that the communication function of the charging pile is tested, and the testing accuracy of the charging pile is improved.
Furthermore, the detection system further comprises a photovoltaic cell panel and a rectifying device, wherein the photovoltaic cell panel is used for being laid on the roof of the vehicle where the detection system is located, the output end of the photovoltaic cell panel is connected with the alternating current side of the rectifying device, and the direct current side of the rectifying device is charged and connected with the energy storage battery system.
Because fill portable detecting system of electric pile and realize the removal function through cooperating with the vehicle, constitute and detect the car, this kind of detection car is owing to expose for a long time in the open air, and usable photovoltaic system turns into the electric energy with solar energy to store in energy storage battery system, solved the on-the-spot test demand of the electric pile that fills who lacks the test equipment power.
Further, the detection system further comprises:
the ice melting device comprises a positive cable, a negative cable, a positive wiring clamp and a negative wiring clamp, wherein the positive cable is connected with the positive wiring clamp, and the input end of the positive cable is connected with the positive output end of the energy storage battery system; the negative cable is connected with the negative binding clip, and the input end of the negative cable is connected with the negative output end of the energy storage battery system; and the positive electrode jointing clamp and the negative electrode jointing clamp are used for connecting an ice-coated circuit.
According to the invention, the ice melting device is powered by the electric energy collected by the energy storage battery system during the charging pile test, so that the problem that normal photovoltaic power supply cannot be carried out due to snow cover under the ice and snow weather condition is solved, and meanwhile, the ice melting function is provided for the ice coating line of the outdoor power distribution network, and the economic effect is good.
Specifically, the parameter acquisition device includes:
the power analyzer is connected with the three-phase voltage regulator through a current detection module and a voltage detection module; the power factor calculation device is used for obtaining the output voltage and current of the three-phase voltage regulator, calculating power and power factors and sending the calculation result to the industrial personal computer. Preferably, the current detection module is an ammeter, and the voltage detection module is a voltmeter.
And the oscilloscope is connected with the direct current output interface and the communication interface of the charging interface circuit simulator in a collecting manner and is used for collecting the charging voltage and current output through the direct current output interface.
In order to fully utilize the electric energy in the energy storage battery system, further, the detection system further comprises:
the power distribution cabinet is connected with the energy storage battery system sequentially through the inverter and the converter and used for providing an alternating current power supply for a three-phase voltage regulator, a parameter acquisition device and an industrial personal computer of the detection system.
Furthermore, an on-off switch is arranged on a connecting line between the energy storage battery system and the converter, and the function switching of the energy storage battery system is realized by controlling the on-off switch, namely the on-off switch is turned on when the actual charging state of the battery of the electric automobile is required to be simulated; and when the energy storage battery system is required to supply power, the on-off switch is closed.
Furthermore, the inverter is a bidirectional inverter, the converter is a bidirectional converter, and the industrial personal computer is used for controlling the bidirectional inverter and the bidirectional converter, so that the power distribution cabinet charges the energy storage battery system to adjust the terminal voltage of the energy storage battery system, and the simulation of the actual charging state of the electric vehicle battery is realized.
Drawings
FIG. 1 is a schematic view of a portable detection system for a charging pile according to the present invention;
FIG. 2-1 is a schematic diagram of the charging connection between the utility power and the charging pile and the electric vehicle according to the present invention;
2-2 are specific charging connections of the charging pile of the present invention with an electric vehicle;
FIG. 3 is a flow chart of the operation of the charging pile test of the present invention;
FIG. 4 is a test item diagram of a charging post interoperability test task of the present invention;
fig. 5 is a schematic diagram of a test item of protocol consistency of a charging pile according to the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The mobile detection system for the charging pile comprises a three-phase voltage regulator, a charging simulation device, a charging interface circuit simulator, a parameter acquisition device and an industrial personal computer, wherein the three-phase voltage regulator is used for connecting an alternating current input end of the charging pile to be detected and adjusting an alternating current power supply of the charging pile to be detected.
The charging simulation equipment comprises a BMS simulator, an energy storage battery system and a direct current load, wherein the energy storage battery system is used for discharging to the direct current load so as to adjust the terminal voltage of the energy storage battery system and realize the simulation of the actual charging state of the battery of the electric vehicle; the direct current load is used for simulating the internal resistance of the battery of the electric automobile; the BMS simulator is used for sending communication signals to the tested charging pile.
In fig. 1, the charging interface circuit simulator includes a charging pile interface (socket), a direct current output interface (DC +, DC-) and a communication interface (S +, S-), wherein the charging pile interface (socket) is used for connecting a charging pile to be tested, the direct current output interface (DC +, DC-) is used for connecting the energy storage battery system and a direct current load, and the communication interface (S +, S-) is connected with the BMS simulator.
In fig. 1, the parameter collecting device includes a power analyzer and an oscilloscope, the power analyzer is connected to the three-phase voltage regulator through an ammeter and a voltmeter, and is used for collecting A, B, C three-phase voltage and current output by the three-phase voltage regulator, calculating power and power factor, and sending the calculation result to the industrial personal computer. In fig. 1, the oscilloscope collects and connects the direct current output interface (DC +, DC-) and the communication interface (S +, S-) of the charging interface circuit simulator, and is used for collecting the charging voltage and current output through the direct current output interface and the voltage output by the communication interface.
In the figure 1, an industrial personal computer is respectively in communication connection with the three-phase voltage regulator, the charging interface circuit simulator, the BMS simulator, the power analyzer and the oscilloscope, and is used for testing control and analyzing a test result, and the performance of the charging pile to be tested is judged according to data sent by the power analyzer and the oscilloscope.
In this embodiment, the mobile detection system for the charging pile further comprises a power distribution cabinet, as shown in fig. 1, the power distribution cabinet is connected with the energy storage battery system sequentially through a bidirectional inverter and a bidirectional converter, and the power distribution cabinet is used for providing an alternating current power supply for a three-phase voltage regulator, a parameter acquisition device and an industrial personal computer of the detection system; meanwhile, the industrial personal computer controls the bidirectional inverter and the bidirectional converter, and the power distribution cabinet can charge the energy storage battery system to adjust the terminal voltage of the energy storage battery system, so that the simulation of the actual charging state of the electric vehicle battery is realized.
An on-off switch (namely a switch 1) is arranged on a connecting line of the energy storage battery system and the converter, and the function switching of the energy storage battery system is realized by controlling the on-off switch, namely the on-off switch is turned on when the actual charging state of the battery of the electric automobile is required to be simulated; and when the energy storage battery system is required to supply power, the on-off switch is closed.
The mobile detection system for the charging pile in fig. 1 further comprises a photovoltaic system and an ice melting device, wherein the photovoltaic system comprises a photovoltaic cell panel and a rectifying device, the photovoltaic cell panel is used for being laid on the roof of a vehicle where the detection system is located, the output end of the photovoltaic cell panel is connected with the alternating current side of the rectifying device, and the direct current side of the rectifying device is charged and connected with the energy storage battery system.
The ice melting device comprises a positive cable, a negative cable, a positive binding clip and a negative binding clip, wherein the positive cable is connected with the positive binding clip, and the input end of the positive cable is connected with the positive output end of the energy storage battery system; in a similar way, the negative cable is connected with the negative binding clip, and the input end of the negative cable is connected with the negative output end of the energy storage battery system. When the ice on the line needs to be melted, the positive electrode jointing clamp and the negative electrode jointing clamp are used for connecting the ice-coated line, the two phases of wires of the ice-coated line are connected in series through the jointing clamps, then the energy storage battery system outputs current, direct current is applied to the ice-coated line, the ice-coated line is used as a load, and therefore the direct current short-circuit current is generated by adopting lower voltage to heat the wires so as to melt the ice on the line.
When the photovoltaic energy storage is influenced by ice coating of a photovoltaic cell panel in a photovoltaic system, the photovoltaic cell panel is used as a load in an ice melting mode, positive voltage is applied to the positive electrode and the negative electrode of the cell panel through positive and negative electrode jointing clamps, unidirectional conduction current can be generated due to a PN junction structure inside the module, energy generated inside the photovoltaic module is converted into heat energy due to the PN junction energy level difference and the existence of semiconductor area resistance when electrons pass through, so that the temperature of the module is increased, ice and snow covered on the cell panel are heated and melted, an ice melting effect is achieved, and the problem that the photovoltaic cell panel cannot generate electricity when covered by the ice and the snow in severe weather is solved. The test development can be still met under the condition that the field test power supply is difficult to access, and the test power supply is effectively guaranteed.
In this embodiment, the electric energy supply of the energy storage battery system includes three types: the first method is that a power distribution cabinet is externally connected with 220V commercial power to directly charge an energy storage battery system with electric energy; the second is the electric energy converted by the photovoltaic system; the third is the electric energy that fills electric pile output when the test, reaches the purpose that the energy saving reduces the emission. In addition, the electric energy of charging pile when the test can not be used for charging continuously under the condition that the energy storage battery is full of electricity, and can be consumed through the direct current load.
The detection system of the invention achieves the purpose of testing the charging device by simulating the actual charging process of the charging pile and the electric vehicle battery, the working schematic diagrams of the common charging pile and the electric vehicle are shown in figures 2-1 and 2-2, and the whole system comprises three parts: commercial power, direct current fill electric pile, electric automobile. The input of the direct current charging pile is connected with the commercial power, and the direct current charging gun head is connected with a direct current charging socket on the electric automobile, so that the commercial power is converted into direct current through the direct current charging pile and then charges the battery of the electric automobile. The vehicle interface (simulated by the charging interface circuit simulator in the embodiment) is connected with nine lines which respectively comprise DC +, DC-, PE, S +, S-, CC1, CC2, A + and A-. Wherein DC + and DC-are positive and negative poles of the direct current output voltage. A + and A-are the positive and negative poles of the low-voltage auxiliary power supply. The signal CC1 point is the check point of direct current charging pile, and signal monitoring point CC2 is the check point of electric automobile. The S + and S-lines are two signal lines of CAN _ H, CAN _ L of CAN communication. The PE line is a car body bottom line or a ground line of the direct current charging pile. The on-off of a direct current supply loop is controlled through contactors K1 and K2 inside the direct current charging pile. The direct current charging loop of the electric automobile can control the on-off of the loop by controlling the contactors K5 and K6. There is a normally closed switch S at the vehicle interface, which is on the charging pile plug. When the plug is inserted into the socket of the electric vehicle, the switch S is pressed. When the plug is fully connected into the socket, the switch S may be released.
Therefore, the research of the automatic testing system of the charging pile (i.e. the mobile testing system of the charging pile) of the embodiment is also based on the working principle between the charging pile and the electric vehicle, when the automatic testing system of the direct current charging pile is designed, the testing environment of the direct current charging pile is designed, and the testing environment can simulate various normal and fault states of the power supply and the working objects (the electric vehicle battery and the BMS) of the charging pile.
In this embodiment, the program-controlled three-phase voltage regulator is used for simulating the working state of the power grid and is the input of the test system; the direct-current charging interface circuit simulator is used for simulating a BMS battery management system of the electric automobile; the direct current load is used for simulating the resistance of the electric automobile, can be exchanged with the energy storage battery system and is the output of the test system; the waveform parameter acquisition instrument is used for acquiring voltage and current waveform signals; the industrial personal computer main control system can set a test flow according to test items, communicate with the program-controlled three-phase voltage regulator, the direct-current load (energy storage battery) and the waveform parameter acquisition instrument, set the use parameters of the three-phase voltage regulator, collect test data and generate a test report according to the test data. The energy flow direction is: commercial power → program-controlled three-phase voltage regulator → direct current charging pile under test → direct current charging interface circuit simulator → direct current load (energy storage battery system).
The detection steps are as follows:
(1) first phase-power-up phase
Firstly, connecting the input A/B/C/N of a direct current charging pile to be tested to the access of a program-controlled three-phase alternating current power supply, and connecting an output charging gun of the direct current charging pile to a charging socket of a direct current charging interface simulator; the direct current load is connected to a DC + and DC-terminal and an energy storage battery system of the direct current charging interface circuit simulator through a switch 2, and is connected with a bidirectional converter DC/DC and an inverter through a switch 1, wherein the switch 2 is a bidirectional switch and can be connected with the direct current load, the DC + and DC-and an energy storage battery, or can be simultaneously connected with the DC + and DC-and the direct current load and the energy storage battery system, and the switch 1 is a unidirectional switch.
And then, the power distribution cabinet is opened to electrify a power supply (a three-phase programmable power supply) of the charging pile, the power supplies of testing equipment such as a power analyzer and an oscilloscope are sequentially opened in the second step, and the power supplies of a direct current load and an energy storage battery are opened in the third step.
(2) Second stage-self-test stage
After the test software on the industrial personal computer is opened, the first step of software execution is to self-check whether all the devices are connected or not and realize the self-check through monitoring the communication messages. If the self-checking finds that the equipment is not connected, the information of the wrong connection of the equipment is printed out, and the equipment problem needs to be manually checked according to the wrong information.
(3) Third phase-equipment parameter configuration phase
The method mainly comprises the steps of setting parameters of a power analyzer, setting parameters of a three-phase programmable power supply, initializing and setting a direct-current load and an energy storage battery, and initializing and setting communication of a BMS simulator.
(4) Fourth phase-executing test items
Selecting test items, wherein three items can be selected, including an electrical performance test, an interoperability test and a protocol consistency test, and initializing test states required by the test items according to the selected items, such as configuring equipment parameters of a direct current load, an energy storage battery system, a program-controlled three-phase voltage regulator, a BMS simulator and the like; controlling a power analyzer and an oscilloscope to read the electrical signal quantity; and processing the acquired data, judging whether the test item of the charging pile is qualified, and displaying specific data and a processing result of the test item.
According to the test items, the industrial personal computer main control system sends control commands to the program-controlled three-phase voltage regulator, the energy storage battery system and the direct-current charging interface circuit simulator, controls the program-controlled three-phase voltage regulator to regulate voltage, controls the energy storage battery system to regulate voltage, controls the charging interface circuit simulator to regulate charging state, and after receiving signal feedback of the program-controlled three-phase voltage regulator, the energy storage battery system and the charging interface circuit simulator, the parameter acquisition instrument starts to record current, voltage and communication data. After the main control system processes and calculates voltage and current data, parameters such as voltage, current, power factor, ripple factor, harmonic content and the like are drawn on the industrial personal computer in real time, data such as charging efficiency, voltage stabilization precision, current stabilization precision and the like of the charging pile are calculated, a test result is formed, and the whole test operation flow is shown in fig. 3.
In the test process, the specific work flow of the charging pile is as follows: fill electric pile and energy storage battery system and pass through the rifle line and link to each other, master control system control direct current interface circuit simulator that charges carries out message interactive work with filling electric pile, when filling electric pile in the stage of shaking hands of charging, the industrial computer control energy storage battery system adjusts the voltage value for the voltage that fills electric pile required to reach, in order to satisfy the charging voltage requirement of filling electric pile to the charging object, when filling electric pile output voltage and reaching this value, the industrial computer control direct current interface circuit simulator that charges carries out message interaction with filling electric pile, the order is filled electric pile and is got into the charging stage, it begins to charge for energy storage battery to fill electric pile this moment, get up.
(5) Fifth phase-data saving phase
When all the test items are executed, the next work is to save data and export a test report. In this embodiment, according to the national standard requirements, the dc charging pile test items include an electrical performance test, an interoperability test, and a protocol conformance test. The electrical performance test items and the pass standards are shown in table 1.
TABLE 1
In the charging pile interoperability test task, specific test items are shown in fig. 4, and the part of the test task needs to test charging lines of the charging pile and the electric vehicle in the operation process of the charging pile, such as simulation of different resistance values of a resistor R4 in a control guidance loop. The test item for interoperability requires the voltage value measurement of four states at the detection point CC1, and particularly requires the measurement of the output voltage and current waveform of the dc charging post at the detection point CC1 in the charging connection control timing test.
Several specific tests for the determination of the charging pile are given below:
1) the charging phase was tested as follows:
the industrial personal computer sends a message through CAN communication of the charging interface circuit simulator so as to report voltage requirements and current requirements, measures output voltage through the charging interface circuit simulator and sends the message to report information such as charging voltage and current measurement values of the battery energy storage system; if the industrial personal computer monitors that the message of the direct current charging pile reports voltage, current output value and accumulated charging time and is in a charging permission state, the test result is normal.
2) The end-of-charge phase test was as follows:
the industrial personal computer sets the voltage value of the BMS simulator through communication of the charging interface circuit simulator, simulates the charging completion state of the electric automobile, sends a message to the energy storage battery system to terminate charging, stops charging of the direct current charging pile, sends the message to terminate charging, and then the test result is normal.
3) The test of the abnormal charging process of the direct current charging pile is as follows:
the industrial personal computer controls the charging interface circuit simulator 10s to periodically send voltage of the energy storage battery system and temperature messages of the energy storage battery system, communication faults of the energy storage battery system are simulated, and if the direct current charging pile stops charging, the test is normal.
In the consistency test of the communication protocol of the charging pile, the communication function of the charging pile needs to be tested. The protocol consistency test items are shown in fig. 5, and in this part of the test, the main key point is the test of fault simulation BMS messages, and whether the charging pile can make a correct response to an abnormal message or a fault sent by the BMS is detected.
To sum up, the portable detecting system of electric pile that fills of this embodiment to direct current fills electric pile as the measurand, provides the automatic test system who fills electric pile, and the corresponding test task is accomplished in the charging environment of electric pile to the simulation, consequently, fills the function that electric pile portable detecting system needs to possess as follows:
(1) from the input of the charging post, the testing system (i.e., the detection system) has an adjustable ac power source. The input condition of the charging pile is simulated, wherein the charging pile comprises three voltages, namely rated voltage, overvoltage and low voltage. The method mainly provides a standard alternating current power supply, can change different voltages and frequencies, performs programming output on abnormal conditions of the power grid, comprises factors such as phase difference, harmonic waves, voltage difference, voltage sudden rise and voltage sudden fall and the like, and evaluates the adaptability of a charging pile to an unstable power grid and the stable output capability of signals. The program-controlled three-phase voltage regulator in the detection system plays a role in accurately simulating the change of the voltage and the frequency of a power grid, ensuring that the charging device works normally in a test state, and realizing that the voltage can be continuously adjusted at 85-115% of the rated voltage of the charging device.
(2) From the output of charging pile, need simulate an electric automobile equipment that charges, consider from the theory of operation between charging pile and the electric automobile, realize through the analog equipment that charges in this embodiment, adopt direct current load and energy storage battery system, and combine BMS simulator, constitute electric automobile charging analog equipment, the industrial computer discharges to direct current load through control energy storage battery system as required during the test, adjust the terminal voltage of energy storage battery system, be used for simulating the terminal voltage of electric automobile battery actual charge state. Utilize BMS simulator simulation electric automobile charging in-process BMS and fill the communication interaction between the electric pile, realize the communication function test to filling electric pile, improve the test accuracy who fills electric pile.
(3) The method comprises the steps of selecting a proper instrument to test the input voltage, the output current, the voltage at the detection point CC1 and the waveform thereof, and monitoring the communication between the charging pile and the BMS.
(4) Automatic test software on the industrial personal computer can detect three test tasks (electrical characteristic test, interoperability test and protocol consistency test) of the direct current charging pile and derive a test report.
It should be noted that, in the actual working process, according to the voltage demand or the current demand, the energy storage battery or the resistance load is regulated and controlled so that the charging pile has the value of the actual output required voltage or the actual output required current. When the charging mode of the energy storage battery is a CV constant voltage state, the energy storage battery needs to be set to a CC constant current mode; when the working mode of the charging pile is CC constant current, the charging pile needs to be set to be CV constant voltage mode. If the output voltage of the CV constant voltage working mode of the charging pile is 500V, the output current is 10A. When the energy storage battery independently simulates the internal resistance of the battery, the mode needs to be set to be the CC mode, and the current is set to be 10A. In actual operation, the resistive load is generally set to a constant power mode. When only the resistance load is used, the constant power CP mode can be set, and the charging process of the charging pile cannot be completely simulated. The initial voltage value of battery can be simulated to the energy storage battery when the system starts, and the initial voltage value that fills electric pile can detect the battery in the parameter configuration stage judges whether its and communication message battery voltage error range is less than or equal to 5%, only can get into the charging stage under the condition of satisfying the condition.
In terms of hardware implementation, in the detection system of the present invention:
the solar panel in the photovoltaic system adopts a single crystal photovoltaic power generation solar panel, and the power is 100W, and the size is 1 square meter; the power of the flexible single crystal battery panel is 400W, an energy storage battery system (namely a lithium battery pack) is charged through a DC/DC photovoltaic converter, and the lithium battery pack realizes power supply of relevant equipment in a parameter acquisition instrument, an industrial personal computer, illumination and other systems through the converter, an inverter and a power distribution cabinet.
The energy storage battery system is composed of 3 24-section 80AH lithium battery modules, the storage capacity of the battery pack is 18kWh, and the battery pack is matched with the DC/DC of the bidirectional converter to realize battery simulation and realize power supply of the whole test system by matching with the inverter.
The oscilloscope is a high-precision waveform data acquisition module, is internally provided with waveform acquisition equipment, is provided with a high-voltage differential probe and a current probe, has the bandwidth of 100MHz and 200MHz, the sampling rate of 1GS/s and the recording length of 1M point, and can acquire voltage and current waveform signals.
The industrial personal computer carries out automatic test data processing on each detection item of the charging device through parameter setting, generates a report, is visual in operation interface and simple to operate, and adopts a high-speed hard disk for storage.
The portable detecting system of charging pile in this embodiment has ice-melt device and photovoltaic system through the integration, has constituted the detecting system of the charging pile detection car of ice-melt light storage integration, divide into two kinds of power supply mode: an energy storage battery system configured in a vehicle is inverted into alternating current 220V commercial power to be supplied to equipment in the vehicle for use; the utility model provides an for external 220V commercial power, the power passes through on-vehicle cable drum switching, inputs in the car, supplies air conditioner or load cooling fan to use, and two kinds of power supply modes can use respectively or simultaneously, satisfy some field test demands that lack the test equipment power.
The mobile detection system for the charging pile has the advantages of high equipment integration level, wiring fixed in a vehicle trunk, avoidance of repeated wiring of each test and the like, and is accurate in test data, high in test speed, high in test backtracking degree, small in workload of testers, direct in issuing of test reports and greatly improved in detection efficiency.
Moreover, the mobile detection system for the charging pile provides great convenience for operation and maintenance detection of the charging pile on a highway and in remote areas, can realize testing of the charging pile, can also supply energy to the ice melting device by using electric energy collected by the energy storage battery system during testing, solves the problem that normal photovoltaic power supply cannot be carried out due to snow cover under the condition of ice and snow weather, and provides an ice melting function for an ice coating line of an outdoor power distribution network, and has a good economic effect.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. For example: in this embodiment, the output voltage and the current of the three-phase voltage regulator are collected by using the ammeter and the voltmeter, and as other embodiments, other current detection modules and voltage detection modules can be used instead of the ammeter and the voltmeter, for example, the ammeter and the voltmeter are implemented by using a hall current sensor and a hall voltage sensor. Therefore, any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (8)
1. A fill portable detecting system of electric pile, its characterized in that, detecting system includes:
the three-phase voltage regulator is used for connecting the alternating current input end of the charging pile to be tested and adjusting the alternating current power supply of the charging pile to be tested;
the charging simulation equipment comprises a BMS simulator, an energy storage battery system and a direct current load, wherein the energy storage battery system is used for discharging to the direct current load so as to adjust the terminal voltage of the energy storage battery system and realize the simulation of the actual charging state of the battery of the electric vehicle; the direct current load is used for simulating the internal resistance of the battery of the electric automobile; the BMS simulator is used for sending a communication signal to the tested charging pile;
the charging interface circuit simulator comprises a charging pile interface, a direct current output interface and a communication interface, wherein the charging pile interface is used for connecting a charging pile to be tested, the direct current output interface is used for connecting the energy storage battery system and a direct current load, and the communication interface is connected with the BMS simulator;
the parameter acquisition device is used for acquiring the output voltage and current of the three-phase voltage regulator and the charging voltage and current output by the direct current output interface;
the industrial computer, the industrial computer is communication connection respectively three-phase voltage regulator, the interface circuit simulator that charges, BMS simulator and parameter acquisition device, the industrial computer is used for judging the performance of the electric pile that fills of being surveyed according to the data that parameter acquisition device sent.
2. The mobile detection system of charging pile according to claim 1, further comprising a photovoltaic cell panel and a rectifying device, wherein the photovoltaic cell panel is used for being laid on the roof of a vehicle where the detection system is located, the output end of the photovoltaic cell panel is connected with the alternating current side of the rectifying device, and the direct current side of the rectifying device is charged and connected with the energy storage battery system.
3. The mobile testing system of claim 1, wherein the testing system further comprises:
the ice melting device comprises a positive cable, a negative cable, a positive wiring clamp and a negative wiring clamp, wherein the positive cable is connected with the positive wiring clamp, and the input end of the positive cable is connected with the positive output end of the energy storage battery system; the negative cable is connected with the negative binding clip, and the input end of the negative cable is connected with the negative output end of the energy storage battery system; and the positive electrode jointing clamp and the negative electrode jointing clamp are used for connecting an ice-coated circuit.
4. The mobile detection system of charging pile according to any one of claims 1 to 3, wherein the parameter acquisition device comprises:
the power analyzer is connected with the three-phase voltage regulator through a current detection module and a voltage detection module;
and the oscilloscope is connected with the direct current output interface and the communication interface of the charging interface circuit simulator in an acquisition manner.
5. The mobile detection system of claim 4, wherein the current detection module is an ammeter and the voltage detection module is a voltmeter.
6. The mobile detection system of charging pile according to any one of claims 1-3, characterized in that the detection system further comprises:
the power distribution cabinet is connected with the energy storage battery system sequentially through the inverter and the converter and used for providing an alternating current power supply for a three-phase voltage regulator, a parameter acquisition device and an industrial personal computer of the detection system.
7. The mobile detection system of charging pile according to claim 6, wherein an on-off switch is arranged on a connection line between the energy storage battery system and the converter.
8. The system for detecting the charging pile movement type according to claim 6, wherein the inverter is a bidirectional inverter, the converter is a bidirectional converter, and the industrial personal computer is used for controlling the bidirectional inverter and the bidirectional converter to enable the power distribution cabinet to charge the energy storage battery system so as to adjust the terminal voltage of the energy storage battery system and simulate the actual charging state of the electric vehicle battery.
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