CN114152821A - Charging pile simulator and working method thereof - Google Patents
Charging pile simulator and working method thereof Download PDFInfo
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- CN114152821A CN114152821A CN202111261293.5A CN202111261293A CN114152821A CN 114152821 A CN114152821 A CN 114152821A CN 202111261293 A CN202111261293 A CN 202111261293A CN 114152821 A CN114152821 A CN 114152821A
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Abstract
The invention discloses a charging pile simulator, which at least comprises: simulating a system; the power supply is electrically connected with the simulation system to provide a charging power source of the simulation system; the program-controlled load is electrically connected with the simulation system to consume the discharge electric energy of the simulation system; the transmission power line is electrically connected with the simulation system and the external charging equipment; wherein, analog system includes: the first contactor is electrically connected to the power supply to control the charging simulation process of the simulation system; the second contactor is electrically connected to the program-controlled load so as to control the discharge simulation process of the simulation system, and the second contactor is connected in parallel with the first contactor; the variable resistor is electrically connected to the transmission power line to output a resistance signal of the working loop. The invention realizes the simulation of different transmission power lines and reduces the working hours and labor cost for testing.
Description
Technical Field
The invention belongs to the field of energy, and particularly relates to a charging pile simulator and a working method thereof.
Background
The charging pile can be fixed on the ground or on the wall, is installed in public buildings (public buildings, markets, public parking lots and the like) and residential area parking lots or charging stations, and can charge various types of electric vehicles according to different voltage levels. The charging performance of the new energy vehicle needs to be detected in the testing stage of the new energy vehicle, and the detection is favorable for guaranteeing the use reliability of the new energy vehicle. Therefore, the application of the charging pile in the charging and discharging test of the new energy vehicle is explored and improved.
Disclosure of Invention
The invention aims to provide a charging pile simulator and a working method thereof, so that the charging and discharging performance test of a new energy vehicle is realized, the reliability and the flexibility of the test are improved, and the service life of related equipment is prolonged.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention provides a charging pile simulator, which is characterized by at least comprising:
simulating a system;
the power supply is electrically connected with the simulation system to provide a charging power source for the simulation system;
the program-controlled load is electrically connected with the simulation system to consume the discharge electric energy of the simulation system; and
the transmission power line is electrically connected with the simulation system and the external charging equipment;
wherein the simulation system comprises:
the first contactor is electrically connected to the power supply to control the charging simulation process of the simulation system;
the second contactor is electrically connected to the program-controlled load so as to control the discharge simulation process of the simulation system, and the second contactor is connected in parallel with the first contactor;
and the variable resistor is electrically connected to the transmission power line so as to output a resistance value signal of the working loop.
The simulation system is electrically connected with a master control system so as to regulate and control the simulation system to switch between a charging test loop and a discharging test loop.
The power supply is an alternating current power supply.
The program-controlled load is a programmable alternating current load and is connected to the simulation system through an RS485 serial port.
The variable resistor is a programmable multi-channel resistor card.
The external charging equipment is a vehicle-mounted charger which is in communication connection with the master control system.
The master control system is in communication connection with the simulation system through Ethernet.
The charging pile simulator comprises an industrial personal computer, wherein the industrial personal computer is electrically connected with the power supply through an RS232 serial port, is electrically connected with the program-controlled load through an RS485 serial port, and is connected with the variable resistor through an LAN interface.
A working method of a charging pile simulator is characterized by comprising the following working steps:
acquiring a control signal, regulating the closing of a first contactor and a second contactor by a simulation system according to the control signal, and replacing a working loop;
according to the control signal, the analog system adjusts the resistance value of the variable resistor to generate a resistance signal;
and according to the resistance signal, the external charging equipment adjusts the charging and discharging current of the high-voltage battery pack to complete the charging and discharging simulation test.
The discharge test step of the simulation system comprises the following steps:
in the working loop, the vehicle-mounted charger receives a three-phase alternating-current high voltage from the power supply;
the vehicle-mounted charger converts three-phase alternating-current high voltage into direct-current high voltage and charges the battery pack according to the converted direct-current high voltage; and
and in the working loop, the battery pack supplies power to the program-controlled load to perform a discharge test.
As described above, the charging pile simulator capable of performing both the charging test and the discharging test is provided, and the two high-voltage contactors are integrated inside the charging pile simulator and communicated with the master control system, so that the charging and discharging of the vehicle-mounted charger are flexibly switched, and the working time and cost for the test are saved. According to the invention, the simulation of different transmission power lines is realized by changing the variable resistance parameters through the charging pile simulator, the frequent plugging and replacement of the transmission power lines can be avoided, the aging of a high-voltage connector and the reduction of the insulation characteristic are avoided, and the service life of the high-voltage connector is prolonged. According to the invention, through the integration of the program-controlled load and the master control system, the flexible adjustment and simulation of the discharge test process of the vehicle-mounted charger are realized, the workload of the discharge test is reduced, and the working hours and the labor cost for the test are reduced.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a functional structure diagram of the charging pile simulator according to the present invention.
Fig. 2 is a block diagram of a charging pile simulator.
Fig. 3 is a connection structure diagram of the main control system.
Fig. 4 is a diagram of a hardware connection structure in the charging pile simulator.
FIG. 5 is a schematic diagram of an interface of an industrial personal computer.
Fig. 6 is a schematic interface diagram of the PCIe board and the programmable relay.
Fig. 7 is a schematic interface diagram of a first relay and a second relay.
Fig. 8 is a schematic view of an interface of a first contactor and a second contactor.
Fig. 9 is a wiring diagram of the electric energy meter.
Fig. 10 is a flowchart illustrating the operation of the charging pile simulator according to the present invention.
Description of reference numerals: the system comprises a charging pile simulator 10, an industrial personal computer 101, a PCIe board card 102, a conditioning board card 103, a programmable relay 104, a first relay 105, a second relay 106, an electric energy meter 107, a power supply 20, a programmable load 30, a simulation system 40, a contact group 401, a first contactor 4011, a second contactor 4012, a variable resistor 402, a transmission power line 50, a main control system 60, a vehicle-mounted charger 70 and a power domain controller 80.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
When the charging pile simulator is used for charging and discharging tests of new energy vehicles, a tested piece can be connected with different devices. For example, when a charging test is performed, the tested piece can be connected to a charging gun and an alternating current charging pile simulator, and when a discharging test is performed, the tested piece is connected to a discharging gun and an alternating current load. In the use process of the charging pile simulator, in order to cater for different discharging scenes, such as vehicle-to-vehicle discharging and vehicle-to-household appliance discharging, the tested piece needs to be connected with different discharging guns, the capacity of receiving electric quantity of the load is adjusted, and discharging testing is carried out. Moreover, the invention can realize the test of the tested piece on the basis of not replacing the discharging gun and the charging gun, and can prolong the service life of the high-voltage connection plug-in and the transmission power line on the simulator.
Referring to fig. 1 and 2, the present invention provides a charging pile simulator 10, which includes a power source 20, a programmable load 30, a simulation system 40, and a transmission power line 50, wherein the simulation system 40 includes a contact set 401 and a variable resistor 402. The simulation system 40 is electrically connected to the power source 20 and the programmable load 30, and is configured to simulate a working state of the circuit, and the transmission power line 50 is electrically connected to the simulation system 40 and the external charging device. The power supply 20, the programmable load 30, the simulation system 40, the transmission power line 50 and the external charging device together form a working loop, in the working loop, the contact group 401 is used for switching the working state of the working loop, specifically the charging state or the discharging state, and the variable resistor 402 simulates different discharging states by changing the resistance value of the working loop, so as to prompt the external charging device to adjust the charging and discharging current of the battery pack. In the working loop, the charging pile simulator 10 can realize the charging test simulation and the discharging test simulation of the external charging equipment in various application occasions. The external charging device is, for example, an on-vehicle charger 70. The transmission power line 50 is, for example, a charging gun power line and a discharging gun power line.
Referring to fig. 1 and fig. 2, in an embodiment of the invention, the contact set 401 includes a first contact 4011 and a second contact 4012, wherein the first contact 4011 is electrically connected to the power source 20 to control a charging simulation process of the simulation system 40. The second contactor 4012 is electrically connected to the programmable load 30 to control a discharging simulation process of the simulation system 40. The contact group 401 is used for realizing switching of a working circuit, when a charging test is needed, the charging circuit is called, namely, the first contactor 4011 is closed, the second contactor 4012 is opened, and the power supply 20 participates in working at the moment to realize the charging test of the external charging equipment. Otherwise, when the discharging test is to be performed, the discharging loop is called, that is, the first contactor 4011 is opened and the second contactor 4012 is closed, and at this time, the programmable load 30 participates in the work, so that the discharging test of the external charging device is realized. These two contactors switch, just can realize filling the charge and discharge process change of electric pile simulator 10 to in single electric pile simulator that fills, just can realize charging and integration of discharging, do not need special change equipment.
Referring to fig. 1 to 3, in an embodiment of the present invention, the charging pile simulator 10 is electrically connected to a main control system 60 for controlling a charging test process and a discharging test process of the simulation system 40. The master control system 60 is electrically connected to a power domain controller 80. The master control system 60 and the power domain controller 80, the master control system 60 and the charging pile simulator 10 may be connected by a low voltage communication harness. And, the vehicle-mounted charger 70 and the main control system 60 are in communication connection through a low-voltage communication harness. The vehicle-mounted charger 70 is electrically connected with a high-voltage junction box, and the high-voltage junction box is electrically connected with a vehicle-mounted charging bag. The charging and discharging tests of the vehicle-mounted charger 70 can be controlled by the power domain controller 80 or the main control system 60. When the power domain controller 80 controls the charging and discharging test of the charging pile simulator 10, the master control system 60 switches the communication line to the power domain controller 80 to be connected with the vehicle-mounted charger 70, so that when the charging and discharging test of the vehicle-mounted charger 70 is performed, the power domain controller 80 is used for controlling the charging and discharging process. When the main control system 60 is used to control the vehicle-mounted charger 70, the main control system 60 switches the communication line to connect the main control system 60 and the vehicle-mounted charger 70, so that the main control system 60 simulates the function of the power domain controller 80 to execute the charging and discharging test of the vehicle-mounted charger 70.
Referring to fig. 1-3, the charging and discharging tests of the vehicle-mounted charger 70 include a local charging and discharging test and a remote charging and discharging test. And the local charging and discharging tests comprise a local discharging test and a local charging test, and the remote charging and discharging tests comprise a remote discharging test and a remote charging test. In the local discharge test, the main control system 60 is provided with vehicle-end discharge parameters, and the power domain controller 80 is informed of the change of the parameters to perform the discharge test on the vehicle-mounted charger 70. Before the discharge test is started, resistance parameters of the variable resistor 402 are set in the alternating current pile simulator 10, and correspond to different discharge capacities of the vehicle-mounted charger 70, wherein the resistance parameters include 2700 Ω -10A, 2000 Ω -16A, 1000 Ω -32A, 470 Ω -63A, for example. After the discharge test is started, according to the vehicle end discharge parameter and the resistance parameter, a configuration file of the discharge test is loaded in the charging pile simulator 10, and the charging pile simulator 10 selects a discharge flow and starts. After the charging pile simulator 10 starts a local discharge test process, the second contactor 4012 is automatically closed, the first contactor 4011 is disconnected, the power of the program-controlled load 30 is controlled and changed, and a discharge test is performed on the vehicle-mounted charger 70. In the discharging test process, because the vehicle-mounted charger 70 is in communication connection with the main control system 60, the main control system 60 monitors the parameters and the state of the whole discharging process in real time. Within the load range of the programmable load 30, the discharge capacity of the onboard charging pack is regulated by the onboard charger 70.
Please refer to fig. 1-3. Before the local charging test of the vehicle-mounted charger 70 is started, the main control system 60 configures corresponding vehicle-end charging parameters. Resistance parameters of the variable resistor 402 are configured in the charging pile simulator 10, and include, for example, 1500 Ω -10A, 680 Ω -16A, 220 Ω -32A, and 100 Ω -63A. According to the vehicle end charging parameters and the resistance parameters, the charging pile simulator 10 loads configuration files of local charging tests, and the charging pile simulator 10 selects a charging process and starts the tests. After the charging pile simulator 10 starts a local charging test process, the second contactor 4012 is automatically disconnected, the first contactor 4011 is closed, and the charging test of the vehicle-mounted charger 70 is started. During the charging test process, the main control system 60 monitors the parameters and status of the entire charging process in real time. The variable resistor 402 and the transmission power line 50 form an output assembly, and the output assembly selects a corresponding resistance parameter by the vehicle-mounted charging 70 by changing the resistance parameter, so as to limit different charging currents of the charging pile simulator 10, and further limit the charging capability of the vehicle-mounted charger 70. In the remote test of the vehicle-mounted charger 70, the main control system 60 configures vehicle-side discharge parameters and vehicle-side charge parameters, the parameter configuration of the variable resistor 402 is still completed in the local operation of the charging pile simulator 10, and the charge and discharge test process is performed at the control end of the main control system 60 of the charging pile simulator 10.
Referring to fig. 1, in one embodiment of the present invention, the power source 20 is an ac power source. Compared with a direct-current power supply charging pile with fast charging, the charging effect realized by the alternating-current power supply can be called as slow charging, the charging pile simulator 10 integrates various hardware, is matched with a software environment of the charging pile simulator, and is matched with the vehicle-mounted charger 70, so that various functional tests of alternating-current charging and discharging under various standards, such as national standards, e.g., European standards, and e.g., American standards, can be executed.
Referring to fig. 4 to 9, in an embodiment of the present invention, the charging pile simulator 10 includes an industrial personal computer 101, a PCIe board 102, a conditioning board 103, a programmable relay 104, a first relay 105, a second relay 106, and an electric energy meter 107. The various hardware are matched to work, so that the local and remote charging and discharging test process of the vehicle-mounted charger 70 is realized, the vehicle-mounted charger can adapt to charging and discharging tests under various standards, the test range is wide, and the simulation test effect is good.
Please refer to fig. 4 and 5. The industrial personal computer 101 is electrically connected to the main control system 60 in an ethernet communication manner. And industrial computer 101 is last to be provided with a plurality of interfaces, a plurality of the interface includes for example RS232 serial ports, for example RS485 serial ports, for example USB interface, for example LAN interface. The industrial personal computer 101 is connected with the power supply 20 through an RS232 serial port, connected with the program control load 30 and the electric energy meter 107 through an RS485 serial port, connected with an oscilloscope and a low-voltage programmable power supply through a USB interface, and connected with the variable resistor 402 through an LAN interface. The industrial personal computer 101 is also provided with an interface connected to the PCIe card 102. In the charging and discharging test process, the charging pile simulator 10 completes data interaction with the master control system 60 through the industrial personal computer 101, vehicle-end charging and discharging parameter setting and configuration loading before starting and testing are achieved, and various components in the charging pile simulator 10 are moved through the industrial personal computer 60 to work.
Please refer to fig. 4 and 6. The PCIe board 102, wherein PCIe is fully called Peripheral Component Interconnect express, and belongs to high-speed serial point-to-point dual channel high-bandwidth transmission. The PCIe board 102 is, for example, an FGPA chip board, and the FGPA chip is called a Field Programmable Gate Array. The PCIe board 102 is electrically connected to the programmable relay 104 and the conditioning board 103, and the electrical connection may be signal connection. The PCIe board 102 outputs two signals, including a DO signal and an AO signal, where the DO signal is output to the programming relay 104, and the AO signal is output to the conditioning board 103, so as to respectively regulate and control the programming relay 104 and the conditioning board 103. The signal output by the PCIe board 102 is a PWM (pulse width modulation) waveform, and the DO signal is rated at, for example, 3.3V, which is, for example, PCIe-7841. The conditioning board 103 is, for example, MB07 in model, adjusts the PCIe board 102 to output a PWM waveform, and may also program the low-voltage programmable power supply. The programmable relay 104 is a relay box to which a switching power supply is connected, and has an output line of, for example, 10 lines, a starting voltage of, for example, 24V, and a DO control signal voltage of, for example, 3.3V.
Please refer to fig. 4-9. The first relay 105 and the second relay 106 are driven by means of the switched-mode power supply, which is rated for a 24V supply, for example. In the case of power failure, both the first relay 105 and the second relay 106 are in a normally closed state, and in the case of power on, the first relay 105 and the second relay 106 are switched from the normally closed state to another line, outputting current to the transmission power line 50. The L1 line, L2 line, L3 line, N line in fig. 4 and 8 are power lines in the charging gun, and the CC line and CP line in fig. 9 are low-voltage wire harnesses in the charging gun, which are connected to the first relay 105 and the second relay 106, respectively. The charging simulator 10 detects a resistance signal at one end of the CC line, the variable resistor 402 outputs the resistance signal to the CC line end, and the vehicle-mounted charger 70 reads the resistance signal at the CC end, adjusts the charging and discharging capacity of the high-voltage battery pack, and limits the charging and discharging current in the charging and discharging test. The starting voltage of the CP line signal output by the second relay 106 is, for example, 12V, and after the CP line signal output by the second relay 106 is switched to a PWM signal, the signal switching and signal output processes are completed by the programmable relay 103.
Please refer to fig. 6 and 8. In an embodiment of the present invention, the programmable load 30 is electrically connected to the industrial personal computer 101 through an RS485 serial port. The first contactor 4011 and the second contactor 4012 are electrically connected to the programmable relay 104.
Referring to fig. 1 and 2, in an embodiment of the present invention, the programmable load 30 is a programmable ac load, has a programming interface and a driver, and is integrated into a test system as a load device to adjust its load power according to a load control signal sent by the charging pile simulator 10, and the main function of the programmable load 30 is to convert ac power generated by discharging the high-voltage battery pack into heat energy in a discharging process of a working circuit.
Referring to fig. 1, the programmable ac load used by the programmable load 30 also meets some basic requirements of the vehicle charging test system, and the basic working index of the programmable ac load is: the nominal voltage can reach 230V/50HZ for example, the access range of single-phase voltage is AC 0-255V for example, the three-phase voltage meets the access requirement of 0-440V for example, the maximum power of a single-phase complete machine can reach 8kW for example, the minimum step is 0.01kW for example, and the maximum on-load power of a three-phase load is 25kW for example. The programmable load 30 is a programmable load, and can meet the test requirements of a 16A, 32A alternating current charging pile, for example, per se, and two machines can meet the test requirements of a 63A charging pile, for example, so that the programmable load can be used as single-phase and three-phase charging pile on-load test equipment, the use parameters of the programmable load 30 are further specified in the test, the parameters which can be reached by the programmable load 30 in the test are obtained, the maximum power of the single-phase complete machine is 8.3kW, the voltage measurement precision is 0.2% Fs, the current measurement precision is 0.5% Fs, and the current regulation step is 0.1A, wherein the test environment temperature is-10 ℃ to +55 ℃, forced air cooling can be adopted, for example, and the display mode can be an LCD display screen. The programmable load 30 allows for remote automatic loading during testing, three-phase voltage and current supply, and three-phase power and frequency regulation. The protection of the programmable load 30 during the test includes, for example, high-temperature protection, low-air-volume protection, overvoltage protection, overcurrent protection, and short-circuit protection.
Referring to fig. 1, in the vehicle-mounted charging and discharging test, according to the parameter that the programmable load as the programmable ac load can reach, the simulator of the present invention employs the programmable load 30, specifically, the programmable ac load, and is applied to the test of the vehicle-mounted charger 70, which is not only convenient to apply, but also enables the discharging test to adjust the circuit parameter more flexibly, and improves the information content of the test data. When being applied to in the test of charging and discharging, programme-controlled load 30 can also possess for example the constant current loading mode, can also satisfy current regulation pace minimum can be for example 0.1A, can realize alternating-current charging stake overload, overcurrent, can realize the requirement such as on-load deciliter circuit test. Therefore, the programmable ac load has a great application prospect in the ac charging pile simulator 10.
Referring to fig. 1 and 3, in an embodiment of the present invention, one end of the variable resistor 402 is connected to the industrial personal computer 101 through a LAN interface, and receives a working signal transmitted by the industrial personal computer 101. The other end of the variable resistor 402 is connected to the first relay 105 through a low-voltage communication wire harness, and the resistance signal is transmitted to the transmission power line 50 through the first relay 105 and then sent to the vehicle-mounted charger 70. The variable resistor 402 is located in two processes of charging and discharging, and different resistance parameters are configured for the variable resistor 402 according to the charging end parameter and the discharging end parameter set by the main control system 60 in the charging and discharging processes of the local test and the remote test. According to the resistance parameter, in the charging test process, the vehicle-mounted charger 70 can grasp the current output capability of the charging pile simulator 10. In the discharge test process, according to the resistance parameter, the vehicle-mounted charger 70 matches the resistance parameter to regulate and control the discharge capacity of the high-voltage battery pack. In the working circuit, such a variable resistor 402, for example a programmable multi-channel resistor card of the type NGI8064A, is a programmable resistor supporting a resolution of at most, for example 6 channels, for example 8 bits. The flexible design architecture allows the board to support resolutions of, for example, 12 bits, such as 16 bits, or such as 24 bits, and larger resistance values for different applications, is well suited for simulating resistive sensors and for system test simulation, allows a user to verify system response during design phase or production test, and can achieve resistance ranges of 0-255 Ω and support, for example, 6 channels in testing using a programmed multi-channel resistive card at, for example, 8 bits of resolution. At a resolution of 12 bits, for example, a resistance in the range of 0-4k Ω can be achieved and support, for example, 4 channels. At a resolution of 16 bits, for example, a resistance in the range of 0-65k Ω can be achieved and support, for example, 3 channels. At a resolution of 24 bits, for example, a resistance in the range of 0-65M Ω can be achieved and support, for example, 2 channels. The variable resistor 402 is applied in a test, and has a very wide test range and high selectivity.
Referring to fig. 3, because the charging pile simulator 10 simulates various discharging objects in a discharging test, different transmission power lines 50 need to be replaced according to different discharging objects, and the transmission power lines 50 do not need to be replaced when the variable resistor 402 is connected, the transmission power lines 50 are simulated and replaced directly through the variable resistor 402, so as to realize the test when the vehicle charges different objects, so that the aging degree of the transmission power lines 50 is very low, the service life of the plug socket is longer, the time for the test can be saved, and the test workload can be reduced.
Referring to fig. 1 and 9, in an embodiment of the invention, the electric energy meter 107 is an ac electric energy meter, and is used for detecting power consumed in the L1 line, the L2 line, the L3 line, and the N line in the charging and discharging test process. Through the further communication connection between the vehicle-mounted charger 70 and the main control system 60, the main control system 60 can hold the current test requirement of the vehicle-mounted charger 70, and the vehicle-mounted charger 70 can be conveniently applied to practical occasions, for example, the vehicle-mounted charger 70 is used for being connected to a European standard alternating current charging and discharging test system. According to the test process of the vehicle-mounted charger 70, the charging pile simulator 10 gives corresponding resistance parameters to simulate different charging and discharging conditions, the vehicle-mounted charger 70 regulates the discharging capacity of the high-voltage battery pack according to the discharging conditions of different devices, and the industrial personal computer 101 regulates the program-controlled load 30 to adapt to the discharging of the high-voltage battery pack and consume alternating current electric energy sent by the program-controlled load.
Referring to fig. 1 and 10, the present invention further provides a working method of a charging pile simulator, including the following steps:
s1, equipment wiring: the external charging equipment is connected with the transmission power line 50, and the external charging equipment such as a vehicle-mounted charger 70 is connected into a working loop of the charging pile simulator 10.
S2, signal communication: according to the test progress, the main control system 60 sends different working signals including a charging test signal and a discharging test signal to the charging pile simulator 10.
S3, test preparation: according to the working signal, the charging pile simulator 10 adjusts the resistance value of the variable resistor 402 to output different resistance signals.
S4, testing process: according to the resistance signal, external charging equipment adjusts the high-voltage battery pack so as to adapt to the charging and discharging current of the charging pile simulator 10.
Referring to fig. 10, in an embodiment of the present invention, after switching the working circuit of the charging pile simulator 10 to the discharging circuit, the testing process of the charging pile simulator 10 includes the following steps:
s41, confirming test contents: and confirming whether the current test content is a discharging test or a charging test according to the working signal of the main control system 40. According to the test content, feedback signals of the first contactor 4011 and the second contactor 4012 are detected, and whether the charging pile simulator 10 is in a corresponding state is determined. The power consumption of the external charging device or the power supply 20 caused by the non-timely adjustment of the loop during the discharging test or the charging test is avoided.
S42, adjusting the resistance value of the variable resistor: after the loop is switched, the resistance value of the variable resistor 402 is adjusted to a desired value according to the resistance adjusting signal provided by the main control system 60.
S43, recording test data: and adjusting the power of the programmable load 30 and recording the discharge test data of the external charging equipment.
Referring to fig. 10, the vehicle-mounted charger 70 receives the three-phase ac high voltage from the power supply 20, converts the three-phase ac high voltage into a dc high voltage, and finally charges the high-voltage battery pack according to the converted dc high voltage. In the discharging test process, the high-voltage battery pack supplies power to the program-controlled load 30 to perform the discharging test.
Referring to fig. 4, when the charging pile simulator 10 is in a testing state, according to the charging end parameter or the discharging end parameter of the main control system 60, the charging pile simulator 10 sends a resistance adjusting signal to the variable resistor 402, adjusts the resistance parameter of the variable resistor 402, generates a resistance signal according to the resistance parameter, transmits the resistance signal to the vehicle-mounted charger 70 through the transmission power line 50, and the vehicle-mounted charger 70 adjusts the high-voltage charging pack to realize the charging and discharging simulation test under different conditions.
In the description of the present specification, reference to the description of the terms "present embodiment," "example," "specific example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The embodiments of the invention disclosed above are intended merely to aid in the explanation of the invention. The examples are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A charging pile simulator, comprising at least:
simulating a system;
the power supply is electrically connected with the simulation system to provide a charging power source for the simulation system;
the program-controlled load is electrically connected with the simulation system to consume the discharge electric energy of the simulation system; and
the transmission power line is electrically connected with the simulation system and the external charging equipment;
wherein the simulation system comprises:
the first contactor is electrically connected to the power supply to control the charging simulation process of the simulation system;
the second contactor is electrically connected to the program-controlled load so as to control the discharge simulation process of the simulation system, and the second contactor is connected in parallel with the first contactor; and
and the variable resistor is electrically connected to the transmission power line so as to output a resistance value signal of the working loop.
2. The charging pile simulator of claim 1, wherein the simulation system is electrically connected with a master control system for controlling the simulation system to switch between the charging test loop and the discharging test loop.
3. A charging pile simulator according to claim 2, in which the power supply is an ac power supply.
4. The charging pile simulator of claim 1, wherein the programmable load is a programmable ac load and the programmable load is connected to the simulation system via an RS485 serial port.
5. The charging pile simulator of claim 1, wherein the variable resistor is a programmable multi-channel resistor card.
6. The charging pile simulator according to claim 1, wherein the external charging device is a vehicle-mounted charger which is in communication connection with the main control system.
7. The charging pile simulator of claim 6, wherein the master control system and the simulation system are in Ethernet communication connection.
8. The charging pile simulator of claim 1, which comprises an industrial personal computer, wherein the industrial personal computer is electrically connected with the power supply through an RS232 serial port, electrically connected with the programmable load through an RS485 serial port, and connected with the variable resistor through an LAN interface.
9. A working method of a charging pile simulator is characterized by comprising the following working steps:
acquiring a control signal, regulating the closing of a first contactor and a second contactor by a simulation system according to the control signal, and replacing a working loop;
according to the control signal, the analog system adjusts the resistance value of the variable resistor to generate a resistance signal; and
and according to the resistance signal, the external charging equipment adjusts the charging and discharging current of the high-voltage battery pack to complete the charging and discharging simulation test.
10. The method of claim 9, wherein the step of testing the simulation system for the discharge comprises:
in the working loop, the vehicle-mounted charger receives a three-phase alternating-current high voltage from the power supply;
the vehicle-mounted charger converts three-phase alternating-current high voltage into direct-current high voltage and charges the battery pack according to the converted direct-current high voltage; and
and in the working loop, the battery pack supplies power to the program-controlled load to perform a discharge test.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111261293.5A CN114152821A (en) | 2021-10-28 | 2021-10-28 | Charging pile simulator and working method thereof |
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| CN202111261293.5A CN114152821A (en) | 2021-10-28 | 2021-10-28 | Charging pile simulator and working method thereof |
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Cited By (1)
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| CN115078864A (en) * | 2022-05-31 | 2022-09-20 | 中国第一汽车股份有限公司 | Electric automobile high-voltage testing system, vehicle, testing method and storage medium |
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