Daylight electric automobile charging and discharging test method, device, system and medium

Abstract

The application provides a daily standard electric vehicle charging and discharging test method, device, system and medium, and relates to the technical field of electric vehicles. The daily standard electric vehicle charging and discharging test method comprises the following steps: firstly, a board card device respectively obtains charging and discharging parameters from a to-be-tested electric vehicle and a power module, and obtains state parameters of the to-be-tested electric vehicle; and then, a test script corresponding to a charging protocol of the to-be-tested electric vehicle is adopted to control the power module to perform charging and discharging test on the to-be-tested electric vehicle according to the state parameters and the charging and discharging parameters. Thus, the charging and discharging test of the electric vehicle realized by the test device and the board card device is separated from the power module, and in use, the test device or the board card device can be configured and expanded, so that the test on the to-be-tested electric vehicle of various charging protocols can be realized.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle technology, and more specifically, to a charging and discharging test method, apparatus, system, and medium for Japanese standard electric vehicles. Background Technology

[0002] With the development of new energy technologies, electric vehicles are becoming increasingly popular due to their low energy consumption, convenience, and flexibility, with electric cars being particularly favored. As electric vehicle technology improves, the requirements for charging and discharging tests are also becoming more stringent.

[0003] Because electric vehicles use a wide variety of charging protocols, current electric vehicle testing systems for charging and discharging can only test electric vehicles using a single type of charging protocol, which is a significant limitation. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by providing a charging and discharging test method, apparatus, system, and medium for Japanese standard electric vehicles, so as to enable charging and discharging tests for electric vehicles with various charging protocols.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:

[0006] In a first aspect, embodiments of this application provide a charging and discharging test method for a Japanese standard electric vehicle, applied to a test device in an electric vehicle test system. The electric vehicle test system further includes: a power module and a circuit board; the power module is connected to the electric vehicle under test; the test device is connected to the electric vehicle under test, and the circuit board is connected to both the test device and the power module; the test device is also connected to the power module; the method includes:

[0007] The control board device obtains charging and discharging parameters from the electric vehicle under test and the power module, respectively.

[0008] Obtain the state parameters of the electric vehicle under test;

[0009] Using a test script based on the charging protocol of the electric vehicle under test, the power module is controlled to perform charging and discharging tests on the electric vehicle under test according to the status parameters and the charging and discharging parameters.

[0010] Optionally, the board device includes: a first feedback board; before controlling the board device to obtain charging and discharging parameters from the power module, the method further includes:

[0011] Control the power module to perform testing;

[0012] After the power module test is completed, control the power module to output an electrical signal according to the pre-charge and discharge voltage;

[0013] The first feedback board controls the connection of the first communication path between the test equipment and the electric vehicle under test.

[0014] Receive the indication information transmitted by the electric vehicle under test through the second communication channel that the vehicle contactor has been closed.

[0015] Optionally, before controlling the power module to perform a charge / discharge test on the electric vehicle under test, the method further includes:

[0016] The status of the vehicle contactor is obtained through the second communication channel;

[0017] The control of the power module for testing includes:

[0018] If the vehicle contactor is in the open state, control the power module to perform a test.

[0019] Optionally, the board device further includes: a second feedback board; before obtaining the status of the vehicle contactor through the second communication path, the method further includes:

[0020] The second feedback board controls the connection of the third communication path between the test equipment and the electric vehicle under test, and obtains the vehicle initialization message sent by the electric vehicle under test through the second communication path. The vehicle initialization message includes energy storage parameters.

[0021] Compatibility testing is performed on the energy storage unit and the power module in the electric vehicle under test based on the energy storage parameters.

[0022] If the compatibility test passes and the charging / discharging permission indication information sent by the electric vehicle under test is received through the second communication channel, the electronic lock between the power module and the electric vehicle under test is closed.

[0023] Optionally, the board device further includes: a first adjustment board, and the method further includes:

[0024] The first adjustment board is controlled to adjust the transmission parameters on the first communication path.

[0025] Optionally, the board device further includes: a second adjustment board, and the method further includes:

[0026] The second adjustment board is controlled to adjust the transmission parameters on the third communication path.

[0027] Optionally, the board device further includes: a data acquisition board, and the method further includes:

[0028] The electrical signal of at least one voltage acquisition point in the test system of the electric vehicle under test is acquired through the acquisition board.

[0029] Secondly, embodiments of this application also provide a charging and discharging testing device for electric vehicles, comprising:

[0030] The acquisition module is used to control the board device to acquire charging and discharging parameters from the electric vehicle under test and the power module, respectively;

[0031] The acquisition module is used to acquire the state parameters of the electric vehicle under test;

[0032] The test module is used to control the power module to perform charge and discharge tests on the electric vehicle under test according to the status parameters and the charge and discharge parameters.

[0033] Thirdly, embodiments of this application also provide a Japanese standard electric vehicle testing system, including: a testing device, a power module, and a circuit board device; the power module is connected to the electric vehicle to be tested; the testing device is connected to the electric vehicle to be tested, and the circuit board device is connected to the testing device and the power module; the testing device is also connected to the power module.

[0034] The testing equipment is used to perform the steps of the charging and discharging test method for Japanese electric vehicles as described in any of the first aspects.

[0035] Fourthly, embodiments of this application also provide a computer-readable storage medium storing a computer program, which, when executed by a processor, performs the steps of the charging and discharging test method for Japanese electric vehicles as described in any of the first aspects.

[0036] The beneficial effects of this application are as follows: This application provides a charging and discharging test method for Japanese standard electric vehicles. First, the control board device obtains charging and discharging parameters from the electric vehicle under test and the power module, and obtains the status parameters of the electric vehicle under test. Then, using a test script corresponding to the charging protocol of the electric vehicle under test, the power module is controlled to perform charging and discharging tests on the electric vehicle under test based on the status parameters and charging and discharging parameters. Therefore, this application achieves electric vehicle charging and discharging testing through testing equipment and board devices, which are separated from the power module. In use, by configuring and expanding the testing equipment or board devices, testing of electric vehicles under test with various charging protocols can be realized. In other words, the electric vehicle testing system provided by this application has strong openness. Users can also develop test scripts to test vehicles based on the resource interfaces provided by the system. The system supports secondary development by users and is compatible with different models of power supplies and loads. It supports users to edit test case logic, expands the testing scope, and improves the practicality of this application.

[0037] In addition, by visualizing the data acquired by the testing equipment, various status information can be displayed in real time in a graphical manner. For example, information of each channel can be recorded using time sequence diagrams, logs, waveform recorders, etc., which enables the tracking of the entire charging and discharging test process. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of an electric vehicle testing system provided in one embodiment of this application;

[0040] Figure 2 A flowchart illustrating a charging and discharging test method for a Japanese standard electric vehicle, as provided in one embodiment of this application;

[0041] Figure 3 A schematic diagram of another Japanese standard electric vehicle testing system provided in an embodiment of this application;

[0042] Figure 4 A flowchart of a charging and discharging test method for a Japanese standard electric vehicle provided in another embodiment of this application;

[0043] Figure 5 A flowchart of a charging and discharging test method for a Japanese standard electric vehicle is provided as another embodiment of this application;

[0044] Figure 6A flowchart of a charging and discharging test method for a Japanese standard electric vehicle is provided as another embodiment of this application;

[0045] Figure 7 This is a schematic diagram of a charging and discharging test device for a Japanese electric vehicle provided in an embodiment of this application. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0047] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one feature. In the description of this invention, "a plurality of" means at least two, such as two or three, unless otherwise expressly specified. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0048] With the development of new energy technologies, electric vehicles are becoming increasingly popular due to their low energy consumption, convenience, and flexibility, with electric cars being particularly favored. As electric vehicle technology improves, the requirements for charging and discharging tests are also becoming more stringent.

[0049] As electric vehicles continue to develop, their charging standards and protocols are also constantly being updated. Therefore, current electric vehicle testing systems for charging and discharging are limited by a single charging protocol or standard, leading to the following problems:

[0050] First, the DC charging protocol conversion circuit board has insufficient system openness in the program that has the relevant parameters fixed, and it cannot truly simulate the Japanese standard charging process.

[0051] Second, the charging protocol conversion module only solves the charging compatibility problem between charging piles and vehicles with inconsistent protocols, but does not realize the true Japanese standard charging sequence.

[0052] Third, it cannot meet the vehicle-custom timing test requirements of electric vehicles using other charging protocols, and cannot satisfy users' needs for test case writing and testing functions;

[0053] Fourth, the test data is not comprehensive enough, making it impossible to trace and analyze the test data, and abnormal testing methods are missing;

[0054] Fifth, the system has poor scalability, cannot integrate testing instruments, cannot be expanded to other charging protocols and charging power, and does not support high-power full-load charge and discharge testing.

[0055] For example, current electric vehicle testing systems perform charge and discharge tests on electric vehicles using a single charging protocol. If the test subject is an electric vehicle using a different charging protocol, the system cannot simulate the charging timing, message interaction, and output capabilities during the charging process under that protocol. Furthermore, it lacks interfaces for developing test cases, and the system's functionality cannot be expanded. This significantly limits the comprehensiveness and systematic nature of charge and discharge testing for electric vehicles using other charging protocols. For instance, when testing cases where the output current exceeds the available output current during charging, if the process messages and response rates are not displayed, the tester cannot intuitively determine the vehicle's protection strategies and performance during the increase in output current.

[0056] For example, current charging and discharging tests for electric vehicles are mostly limited to using adapters, with little variation in their implementation. Electric vehicle testing is a comprehensive, systematic, and complex process; charging and discharging tests conducted in this way do not allow users to quickly complete case tests and data analysis.

[0057] To address the existing problems, this application provides various possible implementation methods for conducting charge and discharge tests on electric vehicles. These are explained below with reference to the accompanying drawings and several examples.

[0058] First, the electric vehicle testing system of this application will be described. Figure 1 This is a schematic diagram of an electric vehicle testing system provided in one embodiment of this application, as shown below. Figure 1 As shown, the electric vehicle testing system includes: testing equipment, a power module, and a circuit board; the power module is connected to the electric vehicle under test; the testing equipment is connected to the electric vehicle under test, and the circuit board is connected to both the testing equipment and the power module; the testing equipment is also connected to the power module.

[0059] The electric vehicle to be tested can be an electric vehicle that complies with charging protocols such as Japanese standard electric vehicle, Chinese standard electric vehicle, and European standard electric vehicle. This application does not limit the specific type of electric vehicle to be tested.

[0060] The power module is the power supply terminal of the electric vehicle under test. For example, it can be a programmable bidirectional DC power source, etc. This application does not limit it.

[0061] Taking a programmable bidirectional DC power supply module as an example, the positive and negative power terminals of the programmable bidirectional DC power supply are its positive and negative DC connection terminals. The AC connection of the programmable bidirectional DC power supply can be electrically connected to the AC connection terminals of a preset AC power source, such as the mains power supply or other AC power sources. Figure 1 The A / B / C / N / PE terminals can be used to represent the three-phase five-wire terminals of a preset AC power supply. Programmable bidirectional DC sources have a positive power terminal. Figure 1 The "+" sign and the negative power terminal (in the text) Figure 1 The "-" in the figure. The electric vehicle under test also has a positive power terminal, also known as a positive DC terminal, such as the one marked with a "-". Figure 1 DC+ and the negative power terminal are also called the negative DC connection terminal, such as Figure 1 The DC-, programmable bidirectional DC power supply and the electric vehicle under test have a ground terminal (PE). The test module is connected to the electric vehicle under test through a communication interface (S+ / S-).

[0062] In this application, the power module can be used, for example, as a power module simulating a DC charging and discharging system, such as the power module of a charging pile, and it adopts an integrated structure of power source and load. The power module can simulate both an AC-DC conversion module when charging an electric vehicle and a regenerative electronic load when discharging an electric vehicle.

[0063] The testing equipment can control the modules or equipment in the electric vehicle testing system to execute relevant instructions according to the relevant requirements of charging testing, such as power-on, power-off, charging / discharging switching, voltage regulation, current regulation and other actions of the power module.

[0064] The board is electrically connected to the power module to measure the output voltage or current of the power module. At the same time, the board is also connected to the test equipment, which can send control commands to the board to control its operation.

[0065] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can be a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0066] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0067] In the above Figure 1 Based on the electric vehicle testing system shown, Figure 2 This application provides a flowchart of a charging and discharging test method for a Japanese standard electric vehicle, according to an embodiment of the present application. This method can be implemented by test equipment in an electric vehicle test system that operates the aforementioned charging and discharging test method for Japanese standard electric vehicles. The test equipment in this electric vehicle test system can be, for example, a terminal device or a server. Figure 2 As shown, the method includes:

[0068] Step 201: The control board obtains charging and discharging parameters from the electric vehicle under test and the power module, respectively.

[0069] When the test equipment starts charging and discharging tests on the electric vehicle under test, the control board obtains charging and discharging parameters from the electric vehicle under test and the power module, so that the electric vehicle test system can start testing the electric vehicle under test according to the user-specified or pre-set charging and discharging test script.

[0070] In one possible implementation, the test equipment can obtain charging and discharging parameters such as the charging standard of the electric vehicle under test (e.g., battery capacity, maximum charging voltage, minimum charging voltage, rated charging voltage, rated charging power, etc.) and the current remaining battery power of the electric vehicle under test from the electric vehicle under test; the board device can obtain charging and discharging parameters such as power supply status (e.g., supply voltage, current, etc.) from the power module. The above is only an illustrative example. In actual implementation, the test equipment may also obtain other types of parameter information, which this application does not limit.

[0071] In one possible implementation, Figure 3 This is a schematic diagram of another electric vehicle testing system provided in an embodiment of this application; as shown. Figure 3 As shown, the test equipment and the electric vehicle under test are connected via six communication paths: S1, VCP, CPD, S+, S-, and S2. S1 and S2 are signal lines; S+ and S- are communication buses (e.g., CAN bus) to enable data transmission between the test equipment and the electric vehicle under test; VCP is the communication path used by the electric vehicle under test to send charging permission information to the test equipment; and CPD is the indicator path for the connection status between the test equipment and the electric vehicle under test. Generally, when the test equipment and the electric vehicle under test are connected, the voltage at the CPD sampling point is between 1.3V and 2.8V.

[0072] In one specific implementation, the test equipment, through a communication connection with the board device, can obtain charging and discharging parameters such as power supply status (e.g., supply voltage, current, waveform, temperature, etc.) from the power module. The above is merely an illustrative example; in actual implementations, the board device may also obtain other types of charging and discharging parameters, which this application does not limit.

[0073] Step 202: Obtain the state parameters of the electric vehicle to be tested.

[0074] It should be noted that the status parameters acquired by the testing equipment refer to parameters that indicate the internal status of the vehicle under test, such as the parameter information of in-vehicle sensors and electrical parameter information.

[0075] In one specific implementation, refer to Figure 3 The test equipment can obtain the status parameters of the electric vehicle under test (such as the opening and closing status of the in-vehicle contactor, charging status, etc.) from the electric vehicle under test in the form of messages through the S+ and S- communication buses.

[0076] Step 203: Using the test script of the charging protocol corresponding to the electric vehicle under test, control the power module to perform charging and discharging tests on the electric vehicle under test according to the status parameters and charging and discharging parameters.

[0077] When the testing equipment begins charging and discharging tests on the electric vehicle under test, different charging protocols often correspond to different charging sequences, message exchanges, input / output methods, etc. Therefore, to obtain more accurate test results, a test script for the charging protocol corresponding to the electric vehicle under test is required. In this application, the test script can be developed and extended by the staff according to actual testing needs; this application does not impose any limitations on this.

[0078] In one possible implementation, the test equipment is pre-integrated with test units corresponding to multiple charging protocols. Different test units can be used to run test scripts for different charging protocols. When executing step 202, the test unit corresponding to the charging protocol can be determined according to the charging protocol adopted by the electric vehicle under test to run the test script for testing.

[0079] Based on the obtained status parameters and charging / discharging parameters, the power supply module is controlled to perform charging and discharging tests on the electric vehicle under test, thereby testing whether the electric vehicle under test functions normally during charging and discharging.

[0080] In one specific implementation, after completing step 203, the test module can control the electrical connection between the voltage discharge module and the positive and negative power terminals of the power module through the board device, thereby discharging the residual voltage between the positive and negative power terminals of the power module.

[0081] In one possible implementation example, the voltage bleed-out module includes a bleed-out contactor and a bleed-out resistor connected in series. During the charge-discharge test of the electric vehicle under test, the board controls the bleed-out contactor to open, at which point the bleed-out resistor is not connected between the positive and negative power terminals of the power module. After the charge-discharge test of the electric vehicle under test is completed, the board controls the bleed-out contactor to open, electrically connecting the bleed-out resistor to the positive and negative power terminals of the power module, thereby bleed-out the residual voltage through the bleed-out resistor. The residual voltage bleed-out module is connected between the positive and negative power terminals of the power module, bleed-out the residual voltage value generated during the charge-discharge test of the electric vehicle under test to a safe voltage value through the bleed-out resistor. The safe voltage value refers to a voltage value that will not cause system damage or personal injury.

[0082] In another specific implementation, after the residual voltage is discharged using the voltage discharge module, the electronic lock between the power module and the electric vehicle under test can be disconnected, thereby separating the power module from the electric vehicle under test (e.g., removing the power module's nozzle). At this point, after the electric vehicle under test is disconnected from the power module, it can still send a message H109.5.2=0 to the test equipment to indicate that its connection with the power module has been interrupted.

[0083] Thus, the charging and discharging tests of the electric vehicle under test were completed.

[0084] This application provides a charging and discharging test method for Japanese standard electric vehicles. First, a control board device acquires charging and discharging parameters from the electric vehicle under test and the power module, and also acquires the status parameters of the electric vehicle under test. Then, using a test script corresponding to the charging protocol of the electric vehicle under test, the power module is controlled to perform charging and discharging tests on the electric vehicle under test based on the status parameters and the charging and discharging parameters. Therefore, this application achieves electric vehicle charging and discharging testing through testing equipment and board devices, separated from the power module. In use, by configuring and expanding the testing equipment or board devices, testing of electric vehicles under test with various charging protocols can be achieved. In other words, the electric vehicle testing system provided by this application has strong openness; users can also develop test scripts to test vehicles based on the resource interfaces provided by the system. The system supports secondary development by users and is compatible with different models of power supplies and loads. It supports users editing test case logic, expanding the testing scope and improving the practicality of this application.

[0085] In addition, by visualizing the data acquired by the testing equipment, various status information can be displayed in real time in a graphical manner. For example, information of each channel can be recorded using time sequence diagrams, logs, waveform recorders, etc., which enables the tracking of the entire charging and discharging test process.

[0086] Optionally, in the above Figure 2Based on this, the board device includes: a first feedback board; this application also provides a possible implementation of a charging and discharging test method for Japanese standard electric vehicles. Figure 4 A flowchart of a charging and discharging test method for a Japanese standard electric vehicle is provided as another embodiment of this application; as shown Figure 4 As shown, before the control board device obtains charging and discharging parameters from the power module, the method includes:

[0087] Step 401: Test the power supply module.

[0088] Before the electric vehicle under test is officially powered on for charging and discharging testing, the power module can be tested to improve the safety of the test. The test of the power module may include insulation testing, voltage stability testing, etc., which are not limited in this application.

[0089] In one possible implementation, the power module can be controlled to perform insulation detection in the following way:

[0090] refer to Figure 3 The power module includes an insulation resistance switching circuit. The positive and negative power terminals of the power module can be electrically connected to the ground terminal of the power module through two insulation resistance switching circuits respectively. The test module is also connected to the insulation resistance switching circuit.

[0091] Specifically, the positive power terminal of the power module is electrically connected to the power module grounding wire (GND) through an insulation resistance switching circuit, and the negative power terminal of the power module is also electrically connected to the grounding terminal through an insulation resistance switching circuit.

[0092] For example, an insulation resistance switching circuit may include: N resistors connected in series, and N-1 switches, with each of the N-1 switches connected in parallel across the N-1 resistors, where N is an integer greater than or equal to 1. The resistance values ​​of the N resistors are all different.

[0093] In practical applications, the test module is connected to the switch in the insulation resistance switching circuit. By controlling the state of the switch, one or more switches can be controlled simultaneously to adjust the resistance value in the insulation resistance switching circuit.

[0094] By setting insulation resistance switching circuits between the positive and negative power terminals and the ground terminal respectively, the insulation fault, alarm and normal states between the positive power terminal and the ground terminal and the negative power terminal and the ground terminal of the power module can be simulated respectively, thereby realizing the testing of the power module.

[0095] Step 402: After the power module test is completed, control the power module to output an electrical signal according to the precharge voltage.

[0096] After the power module test is completed, if the power module is found to be normal, control the power module to output an electrical signal according to the precharge voltage.

[0097] It should be noted that the pre-charge voltage is lower than the formal charging voltage. By controlling the power module to output an electrical signal based on the pre-charge voltage, the electric vehicle under test is pre-charged, thereby improving the safety of charging.

[0098] In one specific implementation, when the control power module outputs an electrical signal based on the precharge voltage, it closes the contactor of the power switching circuit (i.e., Figure 3 (Two power switching circuits are turned on).

[0099] Step 403: The first communication path between the test equipment and the electric vehicle under test is established by controlling the first feedback board.

[0100] In one possible implementation, the test equipment controls the first communication path between the test equipment and the electric vehicle under test through a first feedback board in the control board device (the first feedback board can be, for example, a relay board, etc., which is not limited in this application, as long as it can realize the control and conduction of the first communication path). Figure 3 The first communication path can be Figure 3 (S2 pathway in the middle).

[0101] In one specific implementation, after the first communication path is established, the vehicle contactor inside the control unit of the electric vehicle under test closes. Then, the second communication path is established (see reference). Figure 3 The second communication path can be Figure 3 The S+ and S- paths in the system return indication information that the vehicle contactor has closed (for example, the feedback indication information can be H102.5.3 = 1).

[0102] Step 404: Receive the indication information that the vehicle contactor has been closed, transmitted by the electric vehicle under test through the second communication channel.

[0103] Therefore, the testing equipment can receive the indication information that the vehicle contactor has closed, transmitted through the second communication channel by the test electric vehicle.

[0104] Complete the pre-charge testing of the electric vehicle to be tested.

[0105] Optionally, in the above Figure 4 Based on this, this application also provides a possible implementation of the charging and discharging test method for Japanese standard electric vehicles. Figure 5 A flowchart of a charging and discharging test method for a Japanese standard electric vehicle is provided as another embodiment of this application; as shown Figure 5As shown, before the control power module performs a charge / discharge test on the electric vehicle under test, the method further includes:

[0106] Step 501: Obtain the status of the vehicle contactor through the second communication channel.

[0107] The control power module is tested, including:

[0108] Step 502: If the vehicle contactor is in the open state, the control power module is tested.

[0109] In one possible implementation, before the power module performs a charge / discharge test on the electric vehicle under test, it needs to determine the state of the vehicle contactor. If the vehicle contactor is in a stuck or closed state, the electromagnetic oscillation generated by the rapid voltage change on the side of the electric vehicle under test after the power module supplies power may affect the power module, which is not conducive to the safety and stability of the power module. Therefore, before conducting the charging test, it is necessary to determine the state of the vehicle contactor, that is, to obtain the state of the vehicle contactor through a second communication path. If the vehicle contactor is in an open state, the power module can be controlled to perform the test without any safety risks.

[0110] Optionally, in the above Figure 5 Based on this, this application also provides a possible implementation of the charging and discharging test method for Japanese standard electric vehicles. Figure 6 A flowchart of a charging and discharging test method for a Japanese standard electric vehicle is provided as another embodiment of this application; as shown Figure 6 As shown, the board device further includes: a second feedback board; before obtaining the status of the vehicle contactor through the second communication path, the method further includes:

[0111] Step 601: The third communication path between the test equipment and the electric vehicle under test is activated through the second feedback board, and the vehicle initialization message sent by the electric vehicle under test is obtained through the second communication path. The vehicle initialization message contains energy storage parameters.

[0112] In one possible implementation, the test equipment controls the third communication path between the test equipment and the electric vehicle under test via a second feedback board in the control board device (the second feedback board can be, for example, a relay board, etc., which is not limited in this application, as long as it can realize the control and conduction of the first communication path; this second feedback board and the first feedback board can be the same board or different boards, which is not limited in this application). Figure 3 The third communication path can be Figure 3 (S1 pathway in the middle).

[0113] After the second communication path is established, communication is established through the second communication path (reference). Figure 3The second communication path can be Figure 3 The system uses the S+ and S- channels to obtain the vehicle initialization message sent by the electric vehicle under test. The initialization message includes the energy storage parameters of the electric vehicle under test (such as battery capacity, maximum charging voltage, minimum charging voltage, rated charging voltage, rated charging power, etc.).

[0114] Step 602: Perform compatibility testing on the energy storage unit and power module in the electric vehicle under test according to the energy storage parameters;

[0115] Based on the obtained energy storage parameters, the testing equipment performs compatibility testing on the energy storage unit and power module in the electric vehicle under test, according to the energy storage parameters and relevant information of the power module (the relevant information of the power module can be the power supply attribute information of the power module, such as the maximum power supply voltage, the minimum power supply voltage, etc.), in order to determine whether the power module can charge the electric vehicle under test.

[0116] In one specific implementation, if it is determined that the power module can charge the electric vehicle under test, the compatibility test passes.

[0117] Step 603: If the compatibility test passes and the charging / discharging permission indication information sent by the electric vehicle under test is received through the second communication channel, the electronic lock between the control power module and the electric vehicle under test is closed.

[0118] In one specific implementation, if the testing equipment determines that the compatibility test passes, it feeds back the result to the electric vehicle under test via a second communication path. After receiving the feedback message, the electric vehicle under test performs a compatibility test on the power module. If the electric vehicle under test detects that the power module meets the requirements, it returns a VCP=1 message (on) to the testing equipment. Figure 3 The VCP communication channel and / or the second communication channel feeds back charging and discharging permission indication information to the test equipment, indicating to the test equipment that the power module of the electric vehicle under test is allowed to supply power.

[0119] Subsequently, in order to ensure that there are no potential safety hazards during the power supply process of the power module, the electronic lock between the power module and the electric vehicle under test is closed, so that the power module and the electric vehicle under test cannot be separated when the electronic lock is not opened.

[0120] Optionally, in the above Figure 4 Based on this, this application also provides a possible implementation of a charging and discharging test method for Japanese standard electric vehicles. The circuit board device further includes: a first adjustment board, and the method further includes:

[0121] The first adjustment board is used to adjust the transmission parameters on the first communication path.

[0122] It should be noted that the adjustment board can adjust the resistance value of the adjustable resistor in the electric vehicle test system of this application, such as the bleeder resistor used above.

[0123] In one possible implementation, an adjustable resistor is provided on the first communication path between the test equipment and the electric vehicle under test. The resistance value of this adjustable resistor can be adjusted by a first adjustment board, thereby adjusting the transmission parameters on the first communication path.

[0124] Optionally, in the above Figure 6 Based on this, this application also provides a possible implementation of a charging and discharging test method for Japanese standard electric vehicles. The circuit board device further includes: a second adjustment board, and the method further includes:

[0125] The second control board adjusts the transmission parameters on the third communication path.

[0126] Similar to the above principle, in one possible implementation, an adjustable resistor is provided on the third communication path between the test equipment and the electric vehicle under test. The resistance value of this adjustable resistor can be adjusted by a second adjustment board, thereby adjusting the transmission parameters on the second communication path.

[0127] Optionally, in the above Figure 2 Based on this, this application also provides a possible implementation of a charging and discharging test method for Japanese standard electric vehicles. The circuit board device further includes: a data acquisition board, and the method further includes:

[0128] The electrical signal of at least one voltage acquisition point in the test system of the electric vehicle under test is acquired by the acquisition board.

[0129] The board device can be expanded with acquisition boards (or acquisition units, such as...) Figure 3 The system includes high-voltage acquisition units, low-voltage acquisition units, temperature acquisition units, waveform acquisition units, power acquisition units, etc. (users can expand these according to actual needs) to acquire electrical signals from at least one voltage acquisition point in the test system of the electric vehicle under test.

[0130] Users can set voltage acquisition points according to their analysis and testing needs; this application does not impose any restrictions on this.

[0131] It should be noted that the electric vehicle testing system of this application can be extended to test electric vehicles with multiple charging protocols (such as the charging protocol of Japanese standard electric vehicles, the charging protocol of Chinese standard electric vehicles, and the charging protocol of ChaoJi standard electric vehicles).

[0132] In one specific implementation, a user-defined programming tool can be used as an open script editing platform. By importing system variables, system hardware components (such as power supplies, switching devices, sampling modules, control guidance modules, and resistor-capacitor modules) can be configured and controlled through interfaces. Users can add, delete, and edit custom test cases according to their needs. This allows for the simulation of different Japanese standard charging piles on the market, testing vehicle compatibility, reproducing abnormal test conditions in automakers, and conducting comprehensive system functional testing of the vehicle.

[0133] In addition, the test equipment loads and runs the script file execution environment, controls the charging process, performs system fault detection, and conducts case tests by running scripts. During the test, the software can automatically display test process data, and after the test, it can display all test results and automatically generate a test report containing test data, waveforms, tables, and other content.

[0134] Therefore, the charging and discharging test method for Japanese standard electric vehicles in this application has strong system expandability. For example, its power module and test equipment can reserve national standard AC / DC charging and discharging expansion functions and Chaoji charging function interfaces. The entire electric vehicle test system adopts a modular design. Each module can interact with the system through system variables and can realize the expansion of system functions and peripheral functions through standard communication interfaces.

[0135] High safety: The electric vehicle testing system features safety protection, safety isolation, residual power discharge function, safety grounding, surge protection, and leakage protection. The system not only follows the principle of high and low voltage separation in electrical design, but also provides a complete protection mechanism in software to ensure the safety of test personnel, testing equipment, and vehicles; at the same time, it takes into account comprehensive and thorough testing, and fault detection is configurable.

[0136] Based on safety, it can effectively solve the problems of low system development, incomplete testing, incomplete data, and low safety in the charging test process of existing electric vehicles.

[0137] The following describes the charging and discharging test apparatus, electric vehicle test system, and storage medium used to implement the electric vehicle provided in this application. The specific implementation process and technical effects are described above and will not be repeated below.

[0138] This application provides a possible implementation example of a charging and discharging test device for electric vehicles, which can perform the charging and discharging test method for Japanese electric vehicles provided in the above embodiments. Figure 7 This is a schematic diagram of a charging and discharging testing device for an electric vehicle provided in one embodiment of this application. Figure 7As shown, the electric vehicle charging and discharging test device 100 includes: an acquisition module 71, used to control the board device to acquire charging and discharging parameters from the electric vehicle under test and the power module respectively;

[0139] The acquisition module 71 is also used to acquire the state parameters of the electric vehicle under test;

[0140] Test module 73 is used to control the power supply module to perform charge and discharge tests on the electric vehicle under test based on status parameters and charge and discharge parameters.

[0141] Optionally, test module 73 is used to control the power module for testing;

[0142] The output module is used to control the power module to output an electrical signal according to the pre-charge and discharge voltage after the power module test is completed;

[0143] The conduction module is used to control the conduction of the first communication path between the test equipment and the electric vehicle under test through the first feedback board.

[0144] The receiving module is used to receive the indication information that the vehicle contactor has been closed, transmitted by the electric vehicle under test through the second communication channel.

[0145] Optionally, a status acquisition module is used to acquire the status of the vehicle contactor through a second communication channel;

[0146] The control power module is tested, including:

[0147] Test module 73 is used to control the power supply module to perform tests if the vehicle contactor is in the open state.

[0148] Optionally, a conduction module is used to control the conduction of the third communication path between the test equipment and the electric vehicle under test through the second feedback board, and to obtain the vehicle initialization message sent by the electric vehicle under test through the second communication path. The vehicle initialization message contains energy storage parameters.

[0149] The compatibility testing module is used to perform compatibility testing on the energy storage units and power modules in the electric vehicle under test based on the energy storage parameters.

[0150] The electronic lock control module is used to close the electronic lock between the power supply module and the electric vehicle under test if the compatibility test passes and the charging / discharging permission indication information sent by the electric vehicle under test is received through the second communication channel.

[0151] Optionally, a parameter control module is provided to control the first adjustment board to adjust the transmission parameters on the first communication path.

[0152] Optionally, a parameter control module is provided to control the second adjustment board to adjust the transmission parameters on the third communication path.

[0153] Optionally, a data acquisition module is used to acquire electrical signals from at least one voltage acquisition point in the test system of the electric vehicle under test via a data acquisition board.

[0154] The above-described device is used to execute the method provided in the foregoing embodiments, and its implementation principle and technical effect are similar, so they will not be described again here.

[0155] These modules can be one or more integrated circuits configured to implement the above methods, such as one or more Application Specific Integrated Circuits (ASICs), one or more digital signal processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs). Alternatively, when a module is implemented using processing element scheduler code, the processing element can be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. Furthermore, these modules can be integrated together as a system-on-a-chip (SOC).

[0156] This application provides a possible implementation example of a computer-readable storage medium capable of executing the charging and discharging test method for Japanese electric vehicles provided in the above embodiments. The storage medium stores a computer program, which, when run by a processor, executes the steps of the charging and discharging test method for Japanese electric vehicles.

[0157] A computer program stored in a storage medium may include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0158] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0159] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0160] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0161] The integrated units implemented as software functional units described above can be stored in a computer-readable storage medium. These software functional units, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute partial steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0162] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for charging and discharging test of a daily standard electric vehicle, characterized in that, A testing device applied in an electric vehicle testing system, the electric vehicle testing system further comprising: a power module and a circuit board; the power module is connected to the electric vehicle under test; the testing device is connected to the electric vehicle under test, and the circuit board is connected to the testing device and the power module; the testing device is also connected to the power module; the method includes: The control board device obtains charging and discharging parameters from the electric vehicle under test and the power module respectively. The board device includes multiple functional boards, which include at least a first feedback board, a second feedback board, a first adjustment board, a second adjustment board, and a data acquisition board. Obtain the state parameters of the electric vehicle under test; The test script is run using a test unit corresponding to the charging protocol used by the electric vehicle under test. Based on the status parameters and the charging and discharging parameters, the power module is controlled to perform charging and discharging tests on the electric vehicle under test. The test equipment is pre-integrated with test units corresponding to multiple charging protocols. Different test units are used to run test scripts corresponding to different charging protocols. Before the method of controlling the board device to obtain charging and discharging parameters from the power module, the method further includes: Control the power module to perform testing; After the power module test is completed, control the power module to output an electrical signal according to the pre-charge and discharge voltage; The first feedback board controls the connection of the first communication path between the test equipment and the electric vehicle under test. Receive the indication information that the vehicle contactor has been closed, transmitted by the electric vehicle under test through the second communication channel; Before controlling the power module to perform a charge and discharge test on the electric vehicle under test, the method further includes: The status of the vehicle contactor is obtained through the second communication channel; Before obtaining the status of the vehicle contactor through the second communication path, the method further includes: The second feedback board controls the connection of the third communication path between the test equipment and the electric vehicle under test, and obtains the vehicle initialization message sent by the electric vehicle under test through the second communication path. The vehicle initialization message includes energy storage parameters. Compatibility testing is performed on the energy storage unit and the power module in the electric vehicle under test based on the energy storage parameters. If the compatibility test passes and the charging / discharging permission indication information sent by the electric vehicle under test is received through the second communication channel, the electronic lock between the power module and the electric vehicle under test is closed.

2. The method as described in claim 1, characterized in that, The control of the power module for testing includes: If the vehicle contactor is in the open state, control the power module to perform a test.

3. The method as described in claim 1, characterized in that, The method further includes: The first adjustment board is controlled to adjust the transmission parameters on the first communication path.

4. The method as described in claim 1, characterized in that, The method further includes: The second adjustment board is controlled to adjust the transmission parameters on the third communication path.

5. The method as described in claim 1, characterized in that, The method further includes: The electrical signal of at least one voltage acquisition point in the electric vehicle test system is acquired through the acquisition board.

6. A charging and discharging testing device for electric vehicles, characterized in that, include: The acquisition module and the control board device acquire charging and discharging parameters from the electric vehicle under test and the power module, respectively. The board device includes multiple functional boards, which include at least a first feedback board, a second feedback board, a first adjustment board, a second adjustment board, and an acquisition board. The acquisition module is also used to acquire the state parameters of the electric vehicle under test; The test module is used to run test scripts using test units corresponding to the charging protocol adopted by the electric vehicle under test. Based on the status parameters and the charging and discharging parameters, the power module is controlled to perform charging and discharging tests on the electric vehicle under test. The test equipment is pre-integrated with test units corresponding to multiple charging protocols. Different test units are used to run test scripts corresponding to different charging protocols. Before the control board device obtains charging and discharging parameters from the power module, the charging and discharging test device further includes: The test module is used to control the power module to perform tests; The output module is used to control the power module to output an electrical signal according to the pre-charge and discharge voltage after the power module has been tested. The conduction module is used to control the conduction of the first communication path between the test equipment and the electric vehicle under test through the first feedback board. The receiving module is used to receive the indication information that the vehicle contactor has been closed, transmitted by the electric vehicle under test through the second communication channel. Before the test module controls the power module to perform a charge and discharge test on the electric vehicle under test, the charge and discharge test device further includes: The status acquisition module is used to acquire the status of the vehicle contactor through the second communication path; Before the status acquisition module acquires the status of the vehicle contactor through the second communication path, the charge / discharge test device further includes: The conduction module is used to control the conduction of the third communication path between the test equipment and the electric vehicle under test through the second feedback board, and to obtain the vehicle initialization message sent by the electric vehicle under test through the second communication path. The vehicle initialization message includes energy storage parameters. A compatibility testing module is used to perform compatibility testing on the energy storage unit and the power module in the electric vehicle under test according to the energy storage parameters. The electronic lock control module is used to close the electronic lock between the power module and the electric vehicle under test if the compatibility test passes and the charging / discharging permission indication information sent by the electric vehicle under test is received through the second communication channel.

7. An electric vehicle testing system, characterized in that, include: Test equipment, power modules, and circuit boards; The power module is connected to the electric vehicle under test; the test equipment is connected to the electric vehicle under test, and the board device is connected to the test equipment and the power module; the test equipment is also connected to the power module. The testing equipment is used to perform the steps of the charging and discharging test method for Japanese electric vehicles as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, which, when executed by a processor, performs the steps of the charging and discharging test method for Japanese electric vehicles as described in any one of claims 1 to 5.

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