Electric vehicle charging compatibility test system

Abstract

The invention discloses an electric vehicle charging compatibility test system, and the system comprises a main control module which is used for generating and executing a test strategy, and carrying out the compatibility evaluation of a charging system according to a monitored preset signal of the charging system of an electric vehicle during charging; the test case injection module is used for injecting a preset compatibility test case into the charging system according to the test strategy so as to simulate the actual charging process of the charging system; and the parameter acquisition module is used for monitoring and acquiring a preset signal of the charging system in real time in the charging process, and feeding back the preset signal to the main control module for analysis and processing in real time so as to carry out compatibility evaluation on the charging system. The European-standard electric vehicle charging system can fully identify possible problems of the European-standard electric vehicle charging system, simulates and reproduces the existing problems, is high in expansibility, high in efficiency and rich in verification dimension, and improves the European-standard electric vehicle charging compatibility.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle charging compatibility testing, and particularly to an electric vehicle charging compatibility testing system. Background Art

[0002] During the charging process of European standard electric vehicles, more than 35% of the charging failure cases are due to compatibility defects. Different manufacturers have different implementations of technical details, resulting in frequent charging problems. Existing technologies can only test according to some existing standard requirements and cannot cover more compatibility dimensions. At the same time, directly verifying the compatibility of actual charging piles is costly.

[0003] For example, in the protocol consistency testing of existing technologies, it mainly verifies the reliability of communication messages through a simulator according to protocol standards such as the already published DIN 70121 and ISO 15118. Its disadvantage is that the verification items are single and can only verify some compatibility problems at the communication protocol level.

[0004] Another example is the actual charging pile compatibility testing in existing technologies. It mainly verifies the charging compatibility situation after connecting an actual charging pile to an electric vehicle. If a charging compatibility problem occurs, it must be reliably reproduced, otherwise it cannot be re-verified or additional data collection support can be obtained. Its disadvantages are that a large number of charging pile samples are required, the verification cost is high, and the verification dimension is single, and it can only rely on probabilistic problem events.

[0005] The targeting is low and it cannot meet the market's need for rapid verification. Therefore, it is very necessary to develop a European standard electric vehicle charging compatibility testing system. Summary of the Invention

[0006] The purpose of the present invention is to provide an electric vehicle charging compatibility testing system, especially suitable for realizing the system verification of European standard electric vehicle charging compatibility, aiming at the limitation in the testing of charging compatibility during the testing process of European standard electric vehicles, where the testing is limited to the simple charging verification of standards and actual charging piles and cannot comprehensively and accurately realize verification during the development stage.

[0007] The present invention is implemented as follows:

[0008] An electric vehicle charging compatibility testing system includes:

[0009] A main control module, configured to generate and execute a test strategy, and perform a compatibility assessment on the charging system according to preset signals of the electric vehicle charging system during charging monitored.

[0010] A test case injection module, configured to inject preset compatibility test cases into the charging system according to the test strategy to simulate the actual charging process of the charging system.

[0011] A parameter acquisition module is used for real-time monitoring and acquisition of preset signals during the charging process of the charging system, and real-time feedback to the main control module for analysis and processing to evaluate the compatibility of the charging system.

[0012] Preferably, the parameter acquisition module includes a sensor and a data acquisition and processing unit. The sensor is used to acquire the preset signals, and the data acquisition and processing unit is used to collect and process the preset charging signals acquired by the sensor, including filtering, amplifying, and A / D converting the collected signals to form digital signals and real-time feedback to the main control module for analysis and processing.

[0013] Preferably, the preset signals include the control pilot circuit CP signal, PP signal, voltage signal, current signal, and power signal of the charging system.

[0014] Preferably, the test case injection module injects the compatibility test cases into the charging system through software simulation and / or hardware interfaces. The hardware interfaces include test equipment.

[0015] Preferably, the software simulation method is achieved by modifying the charging control program of the charging system or the charging input control parameters of the simulation model, including modifying the data filling of the charging input control parameters, modifying the data sending period and interval, modifying the data sending order and whether to send of different functional modules of the charging system.

[0016] Preferably, the test equipment includes processing that supports the control pilot circuit CP, PP, and PE hard wires, including adjusting the amplitude and / or on-off of the CP signal, and / or adjusting the resistance value and / or on-off of the PP signal, and / or adjusting the on-off at different positions of the PE.

[0017] Preferably, the compatibility test cases are designed according to different dimensions of charging compatibility, including one or several of charging performance test, reliability test, boundary value test, adaptability test, and fault injection test.

[0018] Preferably, the charging performance test is used to evaluate the charging speed and efficiency of electric vehicles under different charging conditions; by setting test conditions of different charging voltages, currents, and powers for charging, and then real-time collecting charging data including charging time, charging amount, and charging efficiency to form real-time charging parameter curves of the vehicle in different modes. Based on the real-time charging parameter curves, the main control module analyzes and compares historical data to evaluate the charging performance.

[0019] Preferably, the reliability test is used to verify the stability and reliability of the charging system during long-term use; by setting loop test cases or simulating actual use scenarios through software, recording the fault conditions that occur in the charging system, conducting failure rate statistics, and analyzing the reliability of electric vehicle charging, including setting the number of charging cycles for repeated charging or setting the duration of a single charge to simulate the use scenario of a long single charge.

[0020] Preferably, the boundary value test is used to test the response of the charging system under boundary conditions, including whether the charging protection mechanism is triggered and whether the charging system is stable; by the method of controlling variables, a boundary value is selected and set for a preset parameter alone, and the charging response of the electric vehicle is observed; the preset parameters include the maximum and minimum values of the message intervals in each stage of the SLAC phase, the maximum and minimum values of the message intervals in each stage of the Service Payment Selection, the maximum and minimum values of the message intervals in each stage of the Contract Authentication, the maximum and minimum values of the message intervals in each stage of the ChargeParameter phase, the maximum and minimum values of the message intervals in the CableCheck phase, the maximum and minimum values of the message intervals in the Precharge phase, and the maximum and minimum values of the message intervals in the CurrentDemand phase.

[0021] Preferably, the adaptability test is used to verify the compatibility between the electric vehicle and different charging piles, simulate different charging pile data, monitor the charging performance of the vehicle under different simulated charging pile data, and verify whether the charging protocols between the electric vehicle and the charging piles are consistent and the compatibility between the electric vehicle and different charging piles.

[0022] The charging pile data includes the message filling information sent by the charging pile, the sending interval between messages, and the total sending duration of the messages.

[0023] Preferably, the fault injection test is used to simulate various possible fault conditions in the charging system, evaluate the fault recovery ability and fault tolerance of the charging system, including whether it can automatically detect and repair faults and whether it can switch to the standby mode; among them, fault injection techniques including modifying the control software, damaging the hardware connection, or introducing external interference are used for fault injection, and the faults include:

[0024] Timing fault: By modifying the data sending order of different functional modules of the charging system and adjusting the factor of whether to send under different charging stages through a software program, a fault at the timing level is set, and the response of the vehicle is observed.

[0025] Hardware fault: By adjusting the CP amplitude and on / off, different resistances and on / off of the PP, and the on / off of the PE at different charging stages, various scenarios are simulated to trigger hardware faults, and the response of the vehicle is observed.

[0026] External interference: Through the hardware system, increase the resistance of the transmission line, adjust the signal attenuation value, set communication interference at each charging stage, and observe the vehicle's response.

[0027] Simulate abnormal charging pile: Through software linkage with the hardware system, control the actual output of the simulated charging pile, set abnormal output states of the charging pile, including setting the output voltage value lower than the vehicle-requested voltage and the pre-charge voltage equal to 0V to simulate an abnormal charging pile, and observe the vehicle's response.

[0028] The test system of the present invention can fully identify possible problems in the charging system of European standard electric vehicles, and at the same time can simulate and reproduce existing problems. It has strong expandability, high efficiency, rich verification dimensions, can improve the charging compatibility test efficiency of European standard electric vehicles, solves the problem that the existing technology can only test through some existing standard requirements and cannot cover more compatibility dimensions, and the existing test is difficult to reproduce after problems occur with the actual charging pile and cannot achieve the verification effect. Description of the Drawings

[0029] Figure 1 is a schematic diagram of the principle of the electric vehicle charging compatibility test system according to an embodiment of the present invention;

[0030] Figure 2 is a schematic diagram of the principle of the electric vehicle charging compatibility test system according to an embodiment of the present invention;

[0031] Figure 3 is a schematic diagram of the principle of the parameter acquisition module according to an embodiment of the present invention Detailed Embodiment

[0032] The following further describes the present invention in detail with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] When the electric vehicle charging compatibility test system in the embodiment of the present application conducts an electric vehicle charging compatibility test, it is communicatively connected to the electric vehicle, as Figure 1 shown, injects multiple different test cases that meet the electric vehicle charging compatibility test into the battery system of the vehicle according to the test strategy or sequence, and real-time collects feedback signals of different preset charging processes during the test. Finally, it realizes the compatibility test of electric vehicle charging in multiple different dimensions, can simulate and reproduce existing problems, has strong expandability, high efficiency, rich verification dimensions, and can effectively improve the charging compatibility test efficiency of European standard electric vehicles.

[0034] See Figure 2As shown, in an exemplary embodiment of the present application, the electric vehicle charging compatibility test system includes a main control module, a parameter acquisition module, and a test case injection module. Among them, the main control module is responsible for global scheduling, test strategy analysis, and human-machine interaction. It is the core of the entire test system, responsible for coordinating the work between the various modules of the test system, formulating and executing test strategies according to test requirements. The parameter acquisition module is used to collect control pilot circuit CP, PP voltage signals, current signals, power information, voltage information, and monitor and collect. By obtaining the charging process parameters in real time, it provides data support for subsequent test analysis and evaluation. The information test case injection module is used to inject compatibility test cases. Specifically, according to test requirements and strategies, specific test cases are injected into the vehicle's charging system to perform perturbations to simulate various situations during the charging process of an actual electric vehicle.

[0035] In an embodiment of the present application, when performing a test, the main control module, the test case injection module, and the parameter acquisition module are connected according to a dynamic data link: main control module → test case injection module performs perturbations → parameter acquisition module feeds back real-time data. During the test process, the dynamic data link plays a crucial role. The main control module of the data link injects multiple test cases designed in different dimensions into the vehicle's charging system in sequence through the test case injection module to perform perturbations, and the parameter acquisition module will feed back real-time data to the main control module. This dynamic data interaction method enables the test system to adjust the test strategy in real time and more accurately evaluate the charging compatibility based on the real-time data.

[0036] In an embodiment of the present application, the electric vehicle charging compatibility test system can be communicatively connected to the vehicle's charging system through a device (such as a CANoe device) connected to the vehicle via a CAN bus to achieve the injection of the test cases.

[0037] In an embodiment of the present application, the main control module can be built based on a high-performance microprocessor or an embedded system, consisting of a main control chip and a cooperating software program to ensure sufficient computing power and real-time performance. The hardware platform is usually equipped with rich I / O interfaces for communicating with other modules. The software architecture of the main control module can adopt a modular design, and each module is responsible for a specific function, such as global scheduling, test strategy analysis, and human-machine interaction, etc. To enhance the scalability and maintainability of the system, an object-oriented design method can be used to implement it.

[0038] See Figure 3As shown, in the embodiments of the present application, the parameter acquisition module includes a sensor and a data acquisition and processing unit. The sensor is used to monitor and acquire information such as the voltage signal, current signal, power, and voltage of the control and guidance circuits CP and PP. Therefore, a suitable sensor needs to be selected, and the sensor should have characteristics such as high precision, fast response, and long-term stability. The data acquisition and processing unit can be implemented based on a data processing chip and a cooperating signal processing software, and is used to perform processing steps such as filtering, amplifying, and A / D conversion on the acquired data to convert it into a digital signal for analysis by the main control module. To improve the efficiency of data processing, parallel processing or hardware acceleration technology may be adopted.

[0039] In the embodiments of the present application, when injecting test cases, the test case injection module can be injected into the charging system by means of software simulation or hardware interface. Among them, the software simulation method can be to modify the control software or simulation model of the charging system; the hardware interface method can be implemented through a dedicated test interface or device.

[0040] In the embodiments of the present application, the test case injection module is based on the chroma test system in software simulation, and has the normal charging timing function of European standard charging. At the same time, for each function to be implemented in the test system, the input data can be adjusted, and the input data can be filled and modified, the data sending period and interval can be modified, the sending order of each function module and whether to send can be modified, so as to support subsequent test conditions.

[0041] In the embodiments of the present application, the hardware interface supports the processing work of CP, PP, and PE hard wires in hardware, including adjusting the amplitude and on / off of the CP signal, the resistance value and on / off of the PP signal, and the on / off of different positions of PE; at the same time, it can be linked with the software system, and these function settings can be adjusted through the software interaction interface to support subsequent test conditions.

[0042] In the embodiments of the present application, considering that problems of European standard charging compatibility are likely to occur in multiple dimensions, test cases should be designed according to different dimensions of charging compatibility. At the same time, test cases should have characteristics such as representativeness, repeatability, and measurability. Exemplarily, the injected compatibility test cases include charging performance test, reliability test, boundary value test, adaptability test, and fault injection test, which can achieve tests in five dimensions.

[0043] In the embodiments of the present application, based on the establishment of an association matrix of protocol state - electrical parameters - electrical performance, the test case injection module can synchronously simulate charging anomalies caused by hardware reasons such as the control and guidance circuit of the charging system and protocol message reasons. At the same time, it can also adjust the various parameter conditions of the charging system in real time through the test case injection module to achieve dynamic adjustment and control of the test process.

[0044] In the embodiments of the present application, the charging performance test is used to evaluate the charging speed and efficiency of an electric vehicle under different charging conditions. During the test, test conditions such as different charging voltages, currents, and powers can be set. For example, through the test system, charging piles with different power levels, different voltage levels, and different current levels are set in the parameter stage to implement the normal charging function. During the test process, the parameter acquisition module collects charging data in real time, including charging time, charging amount, charging efficiency, etc., to form real-time charging parameter curves of the vehicle in different modes; the main control module analyzes and compares the feedback historical data to evaluate the charging performance.

[0045] In the embodiments of the present application, the reliability test is used to verify the stability and reliability of the charging system during long-term use, and can be achieved through long-term continuous operation tests.

[0046] In the embodiments of the present application, the test system has the function of setting the charging cycle Loop, and at the same time, the one-time charging duration of the charging stage can be set. Exemplarily, during the test, it can be achieved by setting loop test cases or simulating actual usage scenarios through the software of the test system. For example, set the number of charging cycles to 100 times to simulate the charging stability of the vehicle under 100 repeated charges; or set the charging duration to 100 minutes in the charging stage to simulate the reliability of the vehicle charging under a long-term single charge of the charging system.

[0047] In the test process of the reliability test in the embodiments of the present application, record the fault conditions that occur in the charging system, and conduct failure rate statistics and analysis, which helps to discover potential defects and improvement directions of the system.

[0048] In the embodiments of the present application, the boundary value test is used to test the performance of the charging system under extreme boundary conditions, such as the performance under boundary conditions such as the highest / lowest voltage and current. During the boundary value test, observe and record the response of the charging system, including whether the protection mechanism is triggered and whether the system is stable. Through the boundary value test, it helps to evaluate the robustness of the charging system under extreme conditions.

[0049] The boundary conditions can be precisely controlled through the test case injection module, and precise control can be achieved by selecting the maximum and minimum values of different simulated parameters for charging control. Exemplarily, the parameters include: in the SLAC stage, the maximum and minimum values of the intervals between each message (such as CM_SLAC_PARM.REQ and CM_SLAC_PARM.CNF, from the first frame CM_START_ATTEN_CHAR.IND to CM_ATTEN_CHAR.IND), the maximum and minimum values of the intervals between each message in each stage of Service Payment Selection, the maximum and minimum values of the intervals between each message in Contract Authentication, the maximum and minimum values of the intervals between each message in the ChargeParameter stage, the maximum and minimum values of the intervals between each message in the Cable Check stage, the maximum and minimum values of the intervals between each message in the Precharge stage, and the maximum and minimum values of the intervals between each message in the Current Demand stage. By the method of controlling variables, a single boundary value is selected from the above parameters for fault setting. For example, the message interval in the SLAC stage sent by the charging system is set to the maximum value to observe the vehicle response.

[0050] In the embodiment of the present application, the adaptability test is used to verify the compatibility between the electric vehicle and charging piles of different brands and models. For example, during the adaptability test, the charging protocol verification for verifying whether the charging protocols between the electric vehicle and the charging pile are consistent includes protocol verifications in aspects such as signal interaction and power distribution of the control pilot loop.

[0051] In the prior art, in order to verify the compatibility between the electric vehicle and charging piles of different brands and models, multiple charging piles need to be used for testing. In the embodiment of the present application, by collecting the communication statistical data of charging piles covering mainstream brands and models in the market, including various message filling information sent by the charging pile, the sending interval between messages, the total sending duration of messages, etc., and then filling this information into the corresponding part of the charging timing of the test system, and then from the perspective of charging characteristics, by simulating the data of the corresponding model of the charging pile through the system, observing and analyzing the charging performance of the vehicle through the charging pile simulated by the test system, the compatibility between the vehicle and charging piles of different brands and models is verified.

[0052] In the embodiment of the present application, the fault injection test is used to simulate various possible fault situations in the charging system and evaluate the fault recovery ability and fault tolerance of the charging system.

[0053] In order to simulate various possible fault situations in the charging system, a fault injection technique is adopted for fault injection, such as realizing fault injection by modifying the control software, destroying the hardware connection, or introducing external interference, etc. Exemplarily, the following faults are set in the embodiment of the present application:

[0054] (1) Timing fault: By modifying the data transmission sequence of each module of the charging system and adjusting the factors of whether to send in different charging stages through software, set the faults at the timing level and observe the vehicle's response.

[0055] (2) Hardware fault: By adjusting the CP amplitude and on / off, different resistances and on / off of PP, and PE on / off during different charging stages, simulate triggering hardware faults in various scenarios and observe the vehicle's response.

[0056] (3) External interference: Through the hardware system, such as increasing the transmission line resistance and adjusting the signal attenuation value, set communication interference at each stage of charging and observe the vehicle's response.

[0057] (4) Simulate abnormal charging pile: Through software linkage with the hardware system, control the actual output of the simulated charging pile, set abnormal states of the charging pile output, such as the output voltage value is lower than the vehicle-requested voltage, the pre-charge voltage is equal to 0V, simulate abnormal charging pile and observe the vehicle's response.

[0058] Among them, the evaluation of the fault recovery ability and fault tolerance of the said evaluation system is to observe and record the fault recovery ability and fault tolerance of the vehicle's charging system during the fault injection test, including whether the vehicle's main power system can automatically detect and repair faults, whether it can switch to the standby mode, etc.

[0059] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms.

[0060] Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

[0061] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Electric vehicle charging compatibility test system, characterized in that Comprising: A main control module, configured to generate and execute a test strategy, and perform a compatibility assessment on the charging system according to preset signals monitored during charging of the electric vehicle charging system; A test case injection module, configured to inject preset compatibility test cases into the charging system according to the test strategy to simulate the actual charging process of the charging system; A parameter acquisition module, configured to perform real-time monitoring and acquisition of preset signals during the charging process of the charging system, and feedback them in real time to the main control module for analysis and processing to perform a compatibility assessment on the charging system.

2. The electric vehicle charging compatibility test system according to claim 1, wherein The parameter acquisition module includes a sensor and a data acquisition and processing unit. The sensor is configured to acquire the preset signals, and the data acquisition and processing unit is configured to collect and process the preset charging signals acquired by the sensor, including filtering, amplifying, and A / D converting the collected signals to form digital signals and feedback them in real time to the main control module for analysis and processing.

3. The electric vehicle charging compatibility test system according to claim 1, wherein The preset signals include control pilot circuit CP signals, PP signals, voltage signals, current signals, and power signals of the charging system.

4. The electric vehicle charging compatibility test system according to claim 1, wherein, The test case injection module injects the compatibility test cases into the charging system by means of software simulation and / or a hardware interface. The hardware interface includes test equipment.

5. The electric vehicle charging compatibility test system according to claim 4, wherein The software simulation method is implemented by modifying the charging control program of the charging system or the charging input control parameters of the simulation model, including modifying the data filling of the charging input control parameters, modifying the data sending period and interval, modifying the data sending sequence of different functional modules of the charging system, and whether to send.

6. The electric vehicle charging compatibility test system according to claim 4, wherein The test equipment includes processing for supporting control pilot circuit CP, PP, and PE hard wires, including adjusting the amplitude and / or on / off of the CP signal, and / or adjusting the resistance value and / or on / off of the PP signal, and / or adjusting the on / off at different positions of the PE.

7. The electric vehicle charging compatibility test system according to claim 1, characterized in that The compatibility test cases are designed according to different dimensions of charging compatibility, including one or several of charging performance tests, reliability tests, boundary value tests, adaptability tests, and fault injection tests.

8. The electric vehicle charging compatibility test system according to claim 7, wherein, The charging performance test is used to evaluate the charging speed and efficiency of the electric vehicle under different charging conditions; by setting test conditions of different charging voltages, currents, and powers for charging, and then collecting charging data including charging time, charging amount, and charging efficiency in real time to form real-time charging parameter curves of the vehicle in different modes. Based on the real-time charging parameter curves, the main control module analyzes and compares historical data to evaluate the charging performance. Preferably, the reliability test is used to verify the stability and reliability of the charging system during long-term use; by setting loop test cases through software or simulating actual use scenarios, recording the fault situations that occur in the charging system, performing failure rate statistics, and analyzing the reliability of electric vehicle charging, including setting the number of charging cycles for repeated charging, or setting the duration of a single charge to simulate the use scenario of a long-term single charge.

9. The electric vehicle charging compatibility test system according to claim 7, wherein, The boundary value test is used to test the response of the charging system under boundary conditions, including whether the charging protection mechanism is triggered and whether the charging system is stable. By using the method of controlling variables, a boundary value of a preset parameter is selected and set individually, and the charging response of the electric vehicle is observed. The preset parameters include the maximum and minimum values of the message intervals in each stage of the SLAC stage, the maximum and minimum values of the message intervals in each stage of the Service PaymentSelection, the maximum and minimum values of the message intervals in each stage of the Contract Authentication, the maximum and minimum values of the message intervals in each stage of the ChargeParameter stage, the maximum and minimum values of the message intervals in the CableCheck stage, the maximum and minimum values of the message intervals in the Precharge stage, and the maximum and minimum values of the message intervals in the CurrentDemand stage. Preferably, the adaptability test is used to verify the compatibility between the electric vehicle and different charging piles, simulate the data of different charging piles, monitor the charging performance of the vehicle under the simulated data of different charging piles, and verify whether the charging protocols between the electric vehicle and the charging piles are consistent and the compatibility between the electric vehicle and different charging piles. The charging pile data includes the message filling information sent by the charging pile, the sending interval between messages, and the total sending duration of the messages.

10. The electric vehicle charging compatibility test system according to claim 1, wherein The fault injection test is used to simulate various possible fault situations in the charging system, evaluate the fault recovery ability and fault tolerance of the charging system, including whether it can automatically detect and repair faults and whether it can switch to the standby mode. Among them, fault injection technology including modifying the control software, destroying the hardware connection, or introducing external interference is used for fault injection. The faults include: Timing fault: By modifying the data sending sequence of different functional modules of the charging system and adjusting the factor of whether to send in different charging stages through a software program, a fault at the timing level is set, and the response of the vehicle is observed. Hardware fault: By adjusting the CP amplitude and on / off, different resistances and on / off of the PP, and the on / off of the PE at different charging stages, various scenarios are simulated to trigger hardware faults, and the response of the vehicle is observed. External interference: Through the hardware system, the resistance of the transmission line is increased, the signal attenuation value is adjusted, and communication interference is set in each charging stage, and the response of the vehicle is observed. Simulating abnormal charging pile: Through the software-linking hardware system, the actual output of the simulated charging pile is controlled, and the abnormal output state of the charging pile is set, including setting the output voltage value lower than the vehicle-requested voltage and the pre-charge voltage equal to 0V to simulate an abnormal charging pile, and the response of the vehicle is observed.

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