Electric vehicle charging test method, charging test system and equipment

Abstract

The invention provides an electric vehicle charging test method, a charging test system and equipment, and relates to the technical field of electric vehicles. The method comprises the following steps: sending a first waveform parameter to a bidirectional AC source of the charging test system, so that the bidirectional AC source outputs a first abnormal waveform according to the first waveform parameter, and carrying out charging test on a to-be-tested vehicle by adopting the first abnormal waveform; acquiring a charging test parameter of the to-be-tested vehicle based on the first abnormal waveform acquired by a sampling module of the charging test system; according to the charging test parameter, the first waveform parameter is adjusted to be a second waveform parameter, and the second waveform parameter is sent to the bidirectional AC source, so that the bidirectional AC source outputs a second abnormal waveform according to the second waveform parameter, and the second abnormal waveform is adopted to perform charging test on the to-be-tested vehicle. According to the invention, the abnormal fluctuation condition of the power grid in the charging process can be simulated, and the charging safety of the electric vehicle is ensured.

Description

Technical Field

[0001] This application relates to the technical field of electric vehicles, and more specifically, to an electric vehicle charging test method, a charging test system, and a device. Background Art

[0002] With the rapid development of the electric vehicle industry, the construction and development of electric vehicle charging facilities have also been increasingly emphasized.

[0003] Target electric vehicles mainly rely on AC charging piles to provide AC power as a power supply device for electric vehicles with on-board chargers through a conduction method. However, during the actual charging process, abnormal fluctuations in the power grid may cause the electric vehicle to be unable to charge normally and result in damage to the electric vehicle.

[0004] Although many tests are carried out before the AC charging pile and the electric vehicle are put on the market, the lack of real simulation detection of abnormal power grid fluctuations leads to the inability to optimize the AC charging pile and the electric vehicle in the face of abnormal power grid fluctuations, reducing the safety during the actual charging process. Summary of the Invention

[0005] The purpose of this application is to provide an electric vehicle charging test method, a charging test system, and a device for simulating abnormal power grid fluctuations during the charging process and ensuring the safety of electric vehicle charging, in view of the deficiencies in the above-mentioned prior art.

[0006] To achieve the above purpose, the technical solutions adopted in the embodiments of this application are as follows:

[0007] In a first aspect, an embodiment of this application provides an electric vehicle charging test method, which is applied to the main control unit of a charging test system. The method includes:

[0008] Sending first waveform parameters to the bidirectional AC source of the charging test system, so that the bidirectional AC source outputs a first abnormal waveform according to the first waveform parameters, and using the first abnormal waveform to perform a charging test on the vehicle to be tested;

[0009] Obtaining the charging test parameters of the vehicle to be tested based on the first abnormal waveform collected by the sampling module of the charging test system;

[0010] Adjusting the first waveform parameters to second waveform parameters according to the charging test parameters, and sending the second waveform parameters to the bidirectional AC source, so that the bidirectional AC source outputs a second abnormal waveform according to the second waveform parameters, and using the second abnormal waveform to perform a charging test on the vehicle to be tested.

[0011] Optionally, before sending the first waveform parameter to the bidirectional AC source of the charging test system, the method further includes:

[0012] Select the first waveform parameter from a plurality of pre-set test waveform parameters according to the test case number input by the user.

[0013] Optionally, adjusting the first waveform parameter to a second waveform parameter according to the charging test parameter includes:

[0014] If the charging test parameter indicates that the charging state of the vehicle under test charging based on the first abnormal waveform is normal, determine, according to the level of the plurality of test waveform parameters and the level of the first waveform parameter, that the waveform parameter with a level greater than the first waveform parameter is the second waveform parameter;

[0015] If the charging test parameter indicates that the charging state of the vehicle under test charging based on the first abnormal waveform is abnormal, determine, according to the level of the plurality of test waveform parameters and the level of the first waveform parameter, that the waveform parameter with a level less than the first waveform parameter is the second waveform parameter.

[0016] Optionally, adjusting the first waveform parameter to a second waveform parameter according to the charging test parameter includes:

[0017] If the charging test parameter indicates that the charging state of the vehicle under test charging based on the first abnormal waveform is normal, increase the first waveform parameter by a preset value to obtain the second waveform parameter;

[0018] If the charging test parameter indicates that the charging state of the vehicle under test charging based on the first abnormal waveform is abnormal, decrease the first waveform parameter by the preset value to obtain the second waveform parameter.

[0019] Optionally, sending the first waveform parameter to the bidirectional AC source of the charging test system includes:

[0020] If the physical connection between the charging test system and the vehicle under test is completed, send the first waveform parameter to the bidirectional AC source of the charging test system to perform a pre-charging test on the vehicle under test.

[0021] Optionally, sending the first waveform parameter to the bidirectional AC source of the charging test system includes:

[0022] If the physical connection between the charging test system and the vehicle under test is completed, send the fundamental wave parameter to the bidirectional AC source so that the bidirectional AC source outputs the voltage fundamental wave to the vehicle under test, and the vehicle under test enters the charging state based on the voltage fundamental wave;

[0023] Send the first waveform parameter to the bidirectional AC source of the charging test system to perform a charging-in test on the vehicle to be tested.

[0024] Optionally, after performing the pre-charging test on the vehicle to be tested, the method further includes:

[0025] Send a test shutdown instruction to the bidirectional AC source so that the bidirectional AC source outputs a fundamental voltage wave to the vehicle to be tested for a charging recovery test.

[0026] Optionally, sending the first waveform parameter to the bidirectional AC source of the charging test system includes:

[0027] Send the first waveform parameter and the test duration to the bidirectional AC source so that the bidirectional AC source controls to superimpose the test waveform corresponding to the first waveform parameter on the fundamental voltage wave within the test duration.

[0028] Optionally, the method further includes:

[0029] Obtain a preset test step file, where the preset test step file includes multiple test steps, each test step includes a test feature and test parameters corresponding to the test feature, the multiple test steps include an abnormal test step, the abnormal test step includes a grid feature and abnormal grid parameters corresponding to the grid feature, and the abnormal grid parameters are grid parameters when vehicle charging is abnormal collected in advance;

[0030] Generate a test script according to the test step file;

[0031] Execute the test script to perform an abnormal charging test on the vehicle to be tested.

[0032] In a second aspect, an embodiment of the present application further provides a charging test system, and the charging test system includes: a main control unit, a bidirectional AC source, a power circuit module, and a collection module;

[0033] The main control unit is respectively connected to the bidirectional AC source, the power circuit module, and the collection module;

[0034] The bidirectional AC source is further connected to the power circuit module, the power circuit module is used to be connected to the vehicle to be tested, and the main control unit executes the electric vehicle charging test method according to any one of claims 1 to 8 to perform a charging test on the vehicle to be tested.

[0035] Optionally, the charging test system further includes: a guiding circuit module;

[0036] The main control unit is connected to the guiding circuit module and is used to control the guiding circuit module to send a pulse signal to the vehicle to be tested.

[0037] In a third aspect, an embodiment of the present application further provides a charging test device, which is used to execute the electric vehicle charging test method according to any one of the first aspects, and perform a charging test on the vehicle to be tested.

[0038] The beneficial effects of the present application are:

[0039] The electric vehicle charging test method, charging test system and device provided by the present application perform a charging test on the vehicle to be tested through the abnormal waveform output by the bidirectional AC source according to the waveform parameters, and adjust the waveform parameters according to the charging test parameters, so as to realize an automatic charging test on the vehicle to be tested, determine the adaptability of the vehicle to be tested to the abnormal waveform parameters, optimize the battery management system of the vehicle to be tested based on the test results, improve the adaptability of the vehicle to be tested to grid anomalies, avoid failures caused by grid anomalies during the actual charging process of the vehicle, and ensure safety during the actual charging process of the vehicle. Description of the Drawings

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0041] Figure 1 It is the architecture diagram of the charging test system provided by the embodiment of the present application;

[0042] Figure 2 It is the flow chart of the electric vehicle charging test method provided by the embodiment of the present application Figure 1 ;

[0043] Figure 3 It is the flow chart of the electric vehicle charging test method provided by the embodiment of the present application Figure 2 ;

[0044] Figure 4 It is the flow block diagram of the abnormal waveform test before charging provided by the embodiment of the present application;

[0045] Figure 5 It is the flow block diagram of the abnormal waveform test during charging provided by the embodiment of the present application;

[0046] Figure 6 It is the flow chart of the electric vehicle charging test method provided by the embodiment of the present application Figure 3 ;

[0047] Figure 7 Schematic diagram of the charging test device provided by the embodiment of the present application. Detailed implementation manners

[0048] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application.

[0049] Therefore, the detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0050] In addition, the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order different from those illustrated or described here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these process, method, product or device.

[0051] It should be noted that, without conflict, the features in the embodiments of the present application can be combined with each other.

[0052] To facilitate the understanding of the electric vehicle charging test method of the present application, the charging test system applied to the electric vehicle charging test method will be introduced first.

[0053] In a possible implementation manner, Figure 1 is the architecture diagram of the charging test system provided by the embodiment of the present application. As Figure 1 shown, the charging test system may include: a main control unit 10, a bidirectional AC power source 20, a power circuit module 30, and a collection module 40.

[0054] The main control unit 10 is respectively connected to the bidirectional AC power source 20, the power circuit module 30, and the acquisition module 40; the bidirectional AC power source 20 is also connected to the power circuit module 30, and the power circuit module 30 is used to connect to the vehicle to be tested. The main control unit 10 executes the electric vehicle charging test method to perform a charging test on the vehicle to be tested.

[0055] In this embodiment, the bidirectional AC power source 20 can transmit alternating current from the power grid to the vehicle to be tested and provide energy for the vehicle to be tested during the AC charging process of the vehicle to be tested. In addition, the bidirectional AC power source 20 can also transmit the AC power source of the vehicle to be tested back to the power grid in reverse for energy recovery.

[0056] Among them, by setting the bidirectional AC power source in the charging pile or charging device, it can participate in the regulation of the power grid and help maintain the stability and reliability of the power grid.

[0057] The main control unit 10 interacts with the bidirectional AC power source 20 through instructions, and is used to send test instructions to the bidirectional AC power source 20, so that the bidirectional AC power source 20 outputs corresponding test parameters according to the test instructions.

[0058] The main control unit 10 also interacts with the power circuit module 30 through instructions, and is used to control the on / off of the AC contactor in the power circuit module 30. When it is necessary to send test electrical parameters to the vehicle to be tested, the AC contactor in the power circuit module 30 is controlled to conduct, and when the test needs to be ended, the AC contactor in the power circuit module 30 is controlled to disconnect.

[0059] The main control unit 10 is also connected to the acquisition module 40. The acquisition module 40 is used to collect the electrical parameters during the charging process and return the collected electrical parameters to the main control unit 10, so that the main control unit 10 can analyze the test situation according to the electrical parameters.

[0060] In some embodiments, as Figure 1 shown, the charging test system may further include: a charging interface. The power circuit module 30 is connected to the charging interface through a charging cable, and the vehicle to be tested is connected to the charging test system through the charging interface.

[0061] The acquisition module 40 is arranged on the charging cable between the power module 30 and the charging interface, and collects the electrical parameters output by the charging cable during the charging process.

[0062] In some embodiments, as Figure 1 shown, the charging test system may further include: a guiding circuit module 50; the main control unit 10 is connected to the guiding circuit module 50 and is used to control the guiding circuit module to send a pulse signal to the vehicle to be tested.

[0063] In this embodiment, after the charging test system is electrically connected to the vehicle to be tested, it is necessary to determine whether the connection is successful. The main control unit 10 sends a detection instruction to the guiding circuit module 50, and the guiding circuit module 50 sends a PWM waveform to the vehicle to be tested to detect whether the charging test system is successfully connected to the vehicle to be tested.

[0064] In an alternative embodiment, the charging test system provided in the embodiments of the present application is an integrated DC charging pile. The charging interface is used to connect the charging gun, and the charging gun is hung on the host of the charging test system through the gun holder on the charging test system body.

[0065] In an alternative embodiment, the charging test system provided in the embodiments of the present application is a split-type DC charging pile. The charging test system further includes a plurality of charging terminals. The charging interface is used to connect the charging terminals. The charging terminals are separately arranged from the charging test system body. The charging terminals are configured with single charging guns or dual charging guns for outputting power to the vehicle to be tested.

[0066] Based on the above charging test system, a specific implementation manner of an electric vehicle charging test method applied to the main control unit of the charging test system will be described.

[0067] In a possible implementation manner, Figure 2 is a schematic flow chart of an electric vehicle charging test method provided in the embodiments of the present application Figure 1 , as Figure 2 shown, the method may include:

[0068] S101. Send first waveform parameters to the bidirectional AC source of the charging test system, so that the bidirectional AC source outputs a first abnormal waveform according to the first waveform parameters, and use the first abnormal waveform to perform a charging test on the vehicle to be tested.

[0069] In this embodiment, after the charging test system is physically connected to the vehicle to be tested successfully, the main control unit sends a charging test instruction to the bidirectional AC source. The charging test instruction includes first waveform parameters. The first waveform parameters include waveform period, waveform frequency, waveform amplitude, waveform duty cycle, etc. For different types of waveforms, the parameter types included in the waveform parameters are different, and this embodiment does not limit this.

[0070] In some embodiments, if the first waveform parameters are harmonic order and harmonic amplitude content, the bidirectional AC source superimposes a harmonic waveform corresponding to the harmonic order and harmonic amplitude content on the fundamental wave and outputs a first abnormal waveform.

[0071] For example, the amplitude content of the harmonic can be 2.87%, 3.54%, 18.75%, etc. The bidirectional AC source can increase the amplitude of the fundamental wave by 2.87%, 3.54%, 18.75%, etc. and output a first abnormal waveform.

[0072] In some other embodiments, if the first waveform parameter is a special waveform parameter, the bidirectional AC source outputs a first abnormal waveform according to the special waveform parameter, and the first abnormal waveform is a special waveform.

[0073] Exemplarily, the special waveform may be: 90-degree startup wave, voltage square wave, voltage convex wave, voltage surge, voltage dip, voltage sag, spiky wave with ripple, stepped wave, pulse wave, triangular wave, distorted waveform, specific distorted waveform, Russian wave, Mexican wave, South American wave, etc.

[0074] Furthermore, the charging test instruction may further include: a waveform indication identifier, which is used to indicate that the way to output the first abnormal waveform is to superimpose harmonics on the fundamental wave or output an abnormal waveform according to the first waveform parameter.

[0075] S102. Obtain the charging test parameters of the vehicle under test based on the first abnormal waveform collected by the sampling module of the charging test system.

[0076] In this embodiment, the bidirectional AC source performs power output according to the first abnormal waveform through the power circuit module, conducts a charging test on the vehicle under test, and determines whether the vehicle under test can be charged based on the first abnormal waveform.

[0077] The acquisition module acquires the charging test parameters of the vehicle under test during charging based on the first abnormal waveform, and sends the charging test parameters to the main control unit. The charging test parameters may include output voltage, output current, and CP voltage between the charging test system and the connection line of the vehicle under test.

[0078] S103. Adjust the first waveform parameter to a second waveform parameter according to the charging test parameters, and send the second waveform parameter to the bidirectional AC source, so that the bidirectional AC source outputs a second abnormal waveform according to the second waveform parameter, and uses the second abnormal waveform to conduct a charging test on the vehicle under test.

[0079] In this embodiment, the main control unit determines whether the vehicle under test can be normally charged according to the charging test parameters. If the charging test parameters indicate that the vehicle under test can be normally charged, it is determined that the charging of the vehicle under test is not affected by the first waveform parameter. If the charging test parameters indicate that the vehicle under test cannot be normally charged, it is determined that the charging of the vehicle under test is affected by the first waveform parameter.

[0080] The master control unit adjusts the first waveform parameter to the second waveform parameter according to the charging state of the vehicle to be tested, and sends a charging test instruction regarding the second waveform parameter to the bidirectional AC source. The bidirectional AC source outputs a second abnormal waveform according to the second waveform parameter, and the power circuit module performs power output according to the second abnormal waveform to conduct a charging test on the vehicle to be tested, and determines whether the vehicle to be tested can be charged based on the second abnormal waveform.

[0081] In this way, the waveform parameter is continuously adjusted according to the charging test parameter in a loop, so as to conduct an automated test on the vehicle to be tested according to the continuously adjusted abnormal waveform, and determine the adaptability of the vehicle to be tested to the abnormal waveform parameter.

[0082] Based on the abnormal waveform parameter that the vehicle to be tested can adapt to, the bidirectional AC source and / or the battery management system of the vehicle to be tested is optimized to improve the adaptability of the vehicle to be tested to grid abnormalities and ensure safety during the actual charging process of the vehicle.

[0083] The electric vehicle charging test method provided in the above embodiment conducts a charging test on the vehicle to be tested through the abnormal waveform output by the bidirectional AC source according to the waveform parameter, and adjusts the waveform parameter according to the charging test parameter, so as to conduct an automated charging test on the vehicle to be tested, determine the adaptability of the vehicle to be tested to the abnormal waveform parameter, optimize the battery management system of the vehicle to be tested based on the test result, improve the adaptability of the vehicle to be tested to grid abnormalities, avoid failures caused by grid abnormalities during the actual charging process of the vehicle, and ensure safety during the actual charging process of the vehicle.

[0084] In a possible implementation manner, before sending the first waveform parameter to the bidirectional AC source of the charging test system in S101 above, the method may further include:

[0085] Select the first waveform parameter from a plurality of pre-set test waveform parameters according to the test case number input by the user.

[0086] In this embodiment, a plurality of test cases are pre-set in the master control unit, and each test case corresponds to a test waveform parameter. The master control unit provides an input interface for the user. The input interface can be a user interface. The user can input the test case number to the master control unit through the input interface, and the master control unit selects the first waveform parameter from a plurality of test waveform parameters according to the test case number.

[0087] In a possible implementation manner, the process of adjusting the first waveform parameter to the second waveform parameter according to the charging test parameter in S103 above may include:

[0088] If the charging test parameters indicate that the charging status of the vehicle to be tested for charging based on the first abnormal waveform is normal, determine the waveform parameter with a level greater than the first waveform parameter as the second waveform parameter according to the levels of multiple test waveform parameters and the level of the first waveform parameter; if the charging test parameters indicate that the charging status of the vehicle to be tested for charging based on the first abnormal waveform is abnormal, determine the waveform parameter with a level less than the first waveform parameter as the second waveform parameter according to the levels of multiple test waveform parameters and the first level of the first waveform parameter.

[0089] In this embodiment, levels are set for multiple test waveform parameters. Among them, if multiple test waveform parameters correspond to multiple frequencies and multiple amplitude contents of harmonics, the higher the frequency and amplitude content, the higher the level of the test waveform parameter; if multiple test waveform parameters are parameters of multiple special waveforms, the levels of multiple test waveform parameters can be defined manually.

[0090] If the charging test parameters indicate that the vehicle to be tested can be charged normally, determine that the charging of the vehicle to be tested is not affected by the first waveform parameter. In order to determine the upper limit of the abnormal waveform parameter that the vehicle to be tested can withstand, determine the second waveform parameter with a level greater than the first waveform parameter according to the level of the first waveform parameter.

[0091] If the charging test parameters indicate that the vehicle to be tested cannot be charged normally, determine that the charging of the vehicle to be tested is affected by the first waveform parameter. In order to determine the lower limit of the abnormal waveform parameter that the vehicle to be tested can withstand, determine the second waveform parameter with a level less than the first waveform parameter according to the level of the first waveform parameter.

[0092] In another possible implementation manner, the process of adjusting the first waveform parameter to the second waveform parameter according to the charging test parameters in S103 may include:

[0093] If the charging test parameters indicate that the charging status of the vehicle to be tested for charging based on the first abnormal waveform is normal, increase the first waveform parameter by a preset value to obtain the second waveform parameter; if the charging test parameters indicate that the charging status of the vehicle to be tested for charging based on the first abnormal waveform is abnormal, decrease the first waveform parameter by a preset value to obtain the second waveform parameter.

[0094] In this embodiment, the waveform parameter is the frequency and amplitude content of the harmonic. If the charging test parameters indicate that the vehicle to be tested can be charged normally, determine that the charging of the vehicle to be tested is not affected by the first waveform parameter. In order to determine the upper limit of the abnormal waveform parameter that the vehicle to be tested can withstand, a preset frequency and a preset amplitude content can be increased on the basis of the frequency and amplitude content of the first waveform parameter to obtain the second waveform parameter.

[0095] If the charging test parameters indicate that the vehicle to be tested cannot be charged normally, it is determined that the charging of the vehicle to be tested is affected by the first waveform parameter. To determine the lower limit of the abnormal waveform parameter that the vehicle to be tested can withstand, the preset number of times and the preset amplitude content can be reduced based on the number of times and the amplitude content of the first waveform parameter to obtain the second waveform parameter.

[0096] The electric vehicle charging test process provided by the above embodiments can determine the upper and lower limits of the abnormal waveform parameters that the vehicle to be tested can withstand by adjusting the waveform parameters, so as to better optimize the bidirectional AC source and / or the battery management system of the vehicle to be tested, improve the adaptability of the bidirectional AC source and the vehicle to be tested to grid anomalies, avoid faults caused by grid anomalies during the actual charging process of the vehicle, and ensure safety during the actual charging process of the vehicle.

[0097] In a possible implementation manner, the process of sending the first waveform parameter to the bidirectional AC source of the charging test system in S101 may include:

[0098] If the physical connection between the charging test system and the vehicle to be tested is completed, the first waveform parameter is sent to the bidirectional AC source of the charging test system to perform a pre-charging test on the vehicle to be tested.

[0099] In this embodiment, in order to test whether the vehicle can be charged normally based on the abnormal grid situation when the grid is in an abnormal state before the vehicle starts charging, when it is determined that the charging test system is successfully connected to the device to be tested and is in the charging ready state, the main control unit directly sends a charging test instruction corresponding to the first waveform parameter to the bidirectional AC source, so that the bidirectional AC source outputs the first abnormal waveform based on the first waveform parameter, and determines whether the vehicle to be tested can be charged normally based on the first abnormal waveform before formal charging. Then, the first waveform parameter is adjusted according to the charging test parameters for further testing.

[0100] In some embodiments, after the pre-charging test on the vehicle to be tested, the method may further include:

[0101] Send a test shutdown instruction to the bidirectional AC source so that the bidirectional AC source outputs the fundamental voltage wave to the vehicle to be tested for a charging recovery test.

[0102] In this embodiment, after the charging test on the vehicle to be tested according to the abnormal waveform, in order to determine whether the vehicle to be tested is damaged under the influence of the abnormal waveform, that is, whether the vehicle to be tested can be charged normally after the abnormal waveform ends, the bidirectional AC source needs to send a normal waveform to the vehicle to be tested.

[0103] Specifically, the main control unit sends a test shutdown instruction to the bidirectional AC source. The bidirectional AC source outputs a fundamental voltage based on the test shutdown instruction. The power circuit module performs power output based on the fundamental voltage to conduct a charging recovery test on the vehicle to be tested and determine whether the vehicle to be tested can be charged normally.

[0104] In some embodiments, after performing a pre-charging test based on the first waveform parameter and a charging recovery test based on the fundamental voltage, if the vehicle to be tested can resume normal charging based on the fundamental voltage under the influence of the first waveform parameter, the first waveform parameter is adjusted to the second waveform parameter, and the pre-charging test is continued.

[0105] The electric vehicle charging test method provided in the above embodiments can perform a pre-charging test on the vehicle to be tested when the vehicle to be tested is in a charging ready state, so as to test whether the vehicle can be charged normally when the power grid is abnormal before starting charging, and optimize the charging of the vehicle based on the test results to ensure the safety of the charging system during the actual charging process of the vehicle.

[0106] In a possible implementation manner, Figure 3 is a flowchart of the electric vehicle charging test method provided in the embodiments of the present application Figure 2 , as Figure 3 shown, the process of sending the first waveform parameter to the bidirectional AC source of the charging test system in S101 above may include:

[0107] S201. If the physical connection between the charging test system and the vehicle to be tested is completed, send the fundamental parameter to the bidirectional AC source so that the bidirectional AC source outputs a fundamental voltage to the vehicle to be tested, and the vehicle to be tested enters the charging state based on the fundamental voltage.

[0108] S202. Send the first waveform parameter to the bidirectional AC source of the charging test system to perform a mid-charging test on the vehicle to be tested.

[0109] In this embodiment, in order to test the charging state of the vehicle when the power grid is abnormal during normal charging, in this solution, when it is determined that the charging test system is successfully connected to the device to be tested and is in the charging ready state, the main control unit sends a charging test instruction corresponding to the fundamental parameter to the bidirectional AC source. The bidirectional AC source outputs a fundamental voltage based on the fundamental parameter, so as to output the power corresponding to the fundamental voltage to the vehicle to be tested through the power circuit module, so that the vehicle to be tested enters the charging state.

[0110] After the vehicle to be tested enters the charging state, the main control unit sends a charging test instruction corresponding to the first waveform parameter to the bidirectional AC source, so that the bidirectional AC source outputs a first abnormal waveform based on the first waveform parameter, and determines whether the vehicle to be tested can be normally charged based on the first abnormal waveform before formal charging. Then, the first waveform parameter is adjusted according to the charging test parameters for further testing.

[0111] For the electric vehicle charging test method provided in the above embodiment, when the vehicle to be tested is in the charging ready state, the fundamental wave parameters are first sent to the bidirectional AC source to control the vehicle to be tested to enter the charging state, and the first waveform parameter is sent to the bidirectional AC source during the charging process of the vehicle to be tested for in-charging test, so as to test whether the vehicle can be normally charged when the power grid is abnormal during the charging process, so as to optimize the charging of the vehicle based on the test results and ensure the safety of the charging system during the actual charging process of the vehicle.

[0112] In a possible implementation manner, the process of sending the first waveform parameter to the bidirectional AC source of the charging test system in S101 may include:

[0113] Send the first waveform parameter and the test duration to the bidirectional AC source, so that the bidirectional AC source outputs a first abnormal waveform according to the first waveform parameter within the test duration.

[0114] In this embodiment, the charging test instruction sent by the main control unit to the bidirectional AC source includes the first waveform parameter and the test duration. The test duration is used to indicate the maintenance duration for the bidirectional AC source to generate the first abnormal waveform according to the first waveform parameter. After the bidirectional AC source outputs the first abnormal waveform for the test duration, the bidirectional AC source stops outputting the first abnormal waveform according to the first waveform parameter.

[0115] Furthermore, after the bidirectional AC source stops outputting the first abnormal waveform according to the first waveform parameter, it outputs a voltage fundamental wave to the vehicle to be tested for a charging recovery test.

[0116] Exemplarily, Figure 4 is a flowchart of the abnormal waveform test before charging provided by the embodiment of the present application. As Figure 4 shown, after the physical connection between the charging test system and the vehicle to be tested is completed, a PWM signal is sent to the vehicle to be tested through the guiding circuit module to detect whether the physical connection is normal. If the physical connection is normal, it is determined that the vehicle to be tested is in the charging ready state.

[0117] The main control unit controls the bidirectional AC source to be turned on and sets the bidirectional AC source to the single trigger mode. The single trigger mode is used to indicate that the abnormal waveform generated according to the waveform parameter in the charging test instruction appears only once.

[0118] After that, the main control unit sends a charging test command to the bidirectional AC source. The bidirectional AC source outputs an abnormal waveform for a first preset duration according to the charging test command, determines whether the vehicle to be tested can be charged normally, adjusts the waveform parameters according to the charging test parameters, and resends the charging test command.

[0119] After the waveform parameters reach the preset parameter lower limit or the preset parameter upper limit, a test shutdown command is sent to the bidirectional AC source, and the bidirectional AC source outputs a voltage fundamental wave for a second preset duration to determine whether the vehicle to be tested can be charged normally.

[0120] Exemplarily, Figure 5 is a flowchart of the abnormal waveform test during charging provided by an embodiment of the present application. As Figure 5 shown, after the physical connection between the charging test system and the vehicle to be tested is completed, a PWM signal is sent to the vehicle to be tested through the guiding circuit module to detect whether the physical connection is normal. When the physical connection is normal, it is determined that the vehicle to be tested is in the charging ready state.

[0121] The main control unit controls the bidirectional AC source to turn on. The bidirectional AC source outputs a voltage fundamental wave according to the fundamental wave parameters, and the vehicle to be tested enters the charging state.

[0122] After the voltage fundamental wave lasts for a second preset duration, the main control unit sets the bidirectional AC source to a single trigger mode or a multiple trigger mode. The multiple trigger mode is used to indicate that the abnormal waveform generated according to the waveform parameters in the charging test command appears multiple times during the charging process.

[0123] After that, the main control unit sends a charging test command to the bidirectional AC source. The bidirectional AC source outputs an abnormal waveform for a first preset duration according to the charging test command, determines whether the vehicle to be tested can be charged normally, adjusts the waveform parameters according to the charging test parameters, and resends the charging test command.

[0124] After the waveform parameters reach the preset parameter lower limit or the preset parameter upper limit, the test process ends.

[0125] In a possible implementation manner, Figure 6 is a flowchart of the electric vehicle charging test method provided by an embodiment of the present application Figure 3 , as Figure 6 shown, the method may further include:

[0126] S301. Obtain a preset test step file. The preset test step file includes multiple test steps. Each test step includes a test feature and test parameters corresponding to the test feature. The multiple test steps include an abnormal test step. The abnormal test step includes a grid feature and abnormal grid parameters corresponding to the grid feature. The abnormal grid parameters are grid parameters when the vehicle charging is abnormal collected in advance.

[0127] In this embodiment, the charging process of the vehicle includes multiple charging stages. For example, the physical connection stage, the PWM wave generation stage, the ready stage, the charging stage, the shutdown stage, etc. Each stage includes multiple execution steps.

[0128] Abnormal grid parameters refer to the grid parameters when abnormal conditions occur during the vehicle charging process. Since the abnormality is not reproducible, it is difficult to analyze the cause of the abnormality. In order to replay the abnormal situation and collect the abnormal grid parameters when the vehicle is abnormal, an abnormal test step is inserted after any normal test step.

[0129] Exemplarily, the grid characteristics in the abnormal test step can be the grid voltage and the grid waveform, and the abnormal grid parameters can be the abnormal voltage value of the grid voltage, and the grid waveform parameters can be the abnormal waveform parameters of the grid waveform.

[0130] Furthermore, the preset test step file can be encapsulated into a charging model, and each charging model corresponds to a test case.

[0131] S302. Generate a test script according to the test step file.

[0132] In this embodiment, the charging model corresponding to the test step file is loaded into the script editing software, and the charging model is checked for errors. The legality and repeatability are determined from aspects such as the total number of rows, the total number of columns, the configuration content, the charging service, and the step control of the model file. If there are errors, the error location and content are prompted. If there are no errors, the information in the charging model is read, and the information in the charging model is converted into a test script that the software can recognize.

[0133] S302. Execute the test script to perform an abnormal charging test on the vehicle to be tested.

[0134] In this embodiment, the main control unit executes the test script, controls the charging process based on the test steps in the test script, and outputs the voltage and current values corresponding to the test parameters to the vehicle to be tested according to the test parameters corresponding to the test characteristics in the test steps. Each test step is controlled to execute one by one until all the steps are completed, so as to perform an abnormal charging test on the vehicle to be tested.

[0135] In some embodiments, the cause of the abnormal grid parameters can be analyzed according to parameters such as the output voltage, output current, CP voltage, charging current, charging voltage, and charging power of the charging test system.

[0136] In some embodiments, the test step includes a test duration. During the execution of the test step, a timer is started, and the control unit controls the power circuit module to output the power value corresponding to the test parameter according to the test duration.

[0137] The electric vehicle charging test method provided by the above embodiments performs an abnormal charging test on the vehicle to be tested according to abnormal grid parameters, realizes the playback of abnormal data generated during abnormal charging of the vehicle, and can analyze the abnormal cause through the abnormal charging test.

[0138] Based on the electric vehicle charging test method and the charging test system provided by the above embodiments, the embodiments of the present application further provide a charging test device. Figure 7 The following is a schematic diagram of the charging test device provided by the embodiments of the present application. As Figure 7 shown, the charging test device is connected to the vehicle to be tested, and the charging test device executes the electric vehicle charging test method to perform a charging test on the vehicle to be tested.

[0139] Among them, the charging test device can be, for example, a computer device for executing the electric vehicle charging test method.

[0140] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An electric vehicle charging test method, characterized in that, The main control unit applied to the charging test system, the method includes: Sending first waveform parameters to the bidirectional AC source of the charging test system, so that the bidirectional AC source outputs a first abnormal waveform according to the first waveform parameters, and using the first abnormal waveform to perform a charging test on the vehicle to be tested; Obtaining the charging test parameters of the vehicle to be tested based on the first abnormal waveform collected by the sampling module of the charging test system; According to the charging test parameters, adjusting the first waveform parameters to second waveform parameters, and sending the second waveform parameters to the bidirectional AC source, so that the bidirectional AC source outputs a second abnormal waveform according to the second waveform parameters, and using the second abnormal waveform to perform a charging test on the vehicle to be tested.

2. The method according to claim 1, characterized in that, Before sending the first waveform parameters to the bidirectional AC source of the charging test system, the method further includes: Selecting the first waveform parameters from a plurality of pre-set test waveform parameters according to the test case number input by the user.

3. The method according to claim 2, characterized in that The adjusting the first waveform parameters to second waveform parameters according to the charging test parameters includes: If the charging test parameters indicate that the charging state of the vehicle to be tested based on the first abnormal waveform is normal, determining, according to the levels of the plurality of test waveform parameters and the level of the first waveform parameters, that the waveform parameter with a level higher than that of the first waveform parameter is the second waveform parameter; If the charging test parameters indicate that the charging state of the vehicle to be tested based on the first abnormal waveform is abnormal, determining, according to the levels of the plurality of test waveform parameters and the level of the first waveform parameters, that the waveform parameter with a level lower than that of the first waveform parameter is the second waveform parameter.

4. The method according to claim 1, wherein The adjusting the first waveform parameters to second waveform parameters according to the charging test parameters includes: If the charging test parameters indicate that the charging state of the vehicle to be tested based on the first abnormal waveform is normal, increasing the first waveform parameters by a preset value to obtain the second waveform parameters; If the charging test parameters indicate that the charging state of the vehicle to be tested based on the first abnormal waveform is abnormal, decreasing the first waveform parameters by the preset value to obtain the second waveform parameters.

5. The method according to claim 1, characterized in that, The sending the first waveform parameters to the bidirectional AC source of the charging test system includes: If the physical connection between the charging test system and the vehicle to be tested is completed, sending the first waveform parameters to the bidirectional AC source of the charging test system to perform a pre-charging test on the vehicle to be tested.

6. The method according to claim 1, wherein The sending the first waveform parameters to the bidirectional AC source of the charging test system includes: If the physical connection between the charging test system and the vehicle to be tested is completed, sending fundamental wave parameters to the bidirectional AC source, so that the bidirectional AC source outputs a voltage fundamental wave to the vehicle to be tested, and the vehicle to be tested enters a charging state based on the voltage fundamental wave; Sending the first waveform parameters to the bidirectional AC source of the charging test system to perform a mid-charging test on the vehicle to be tested.

7. The method according to claim 5, wherein After performing the pre - charge test on the vehicle to be tested, the method further includes: Sending a test shutdown instruction to the bidirectional AC source so that the bidirectional AC source outputs a voltage fundamental wave to the vehicle to be tested for a charge recovery test on the vehicle to be tested.

8. The method according to claim 1, wherein The method further includes: Obtaining a preset test step file, where the preset test step file includes multiple test steps, each test step contains a test feature and test parameters corresponding to the test feature, the multiple test steps include an abnormal test step, the abnormal test step contains a grid feature and abnormal grid parameters corresponding to the grid feature, and the abnormal grid parameters are grid parameters collected in advance when vehicle charging is abnormal; Generating a test script according to the test step file; Executing the test script to perform an abnormal charging test on the vehicle to be tested.

9. A charging test system, characterized in that, The charging test system includes: a main control unit, a bidirectional AC source, a power circuit module, and a collection module; The main control unit is respectively connected to the bidirectional AC source, the power circuit module, and the collection module; The bidirectional AC source is further connected to the power circuit module, the power circuit module is used to be connected to the vehicle to be tested, and the main control unit executes the electric vehicle charging test method according to any one of claims 1 to 8 to perform a charging test on the vehicle to be tested.

10. A charging test device, characterized in that, The charging test device is used to execute the electric vehicle charging test method according to any one of claims 1 to 8 to perform a charging test on the vehicle to be tested.

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