Vehicle testing device, system, method, vehicle and vehicle test bench

Abstract

The present disclosure relates to a vehicle testing device, a system, a method, a vehicle and a vehicle test bench. A vehicle testing device is used to test a charging function of a vehicle, the vehicle testing device comprising: a first test circuit connected to a power supply interface of a charging device and a charging interface of a vehicle, respectively, the power supply interface charges the charging interface via the first test circuit, and the first test circuit is configured to: in response to a test instruction for testing the charging function of the vehicle, change the connection state of the first test circuit to change the charging state of the power supply interface charging the charging interface.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle testing, and in particular to testing of a vehicle charging function. Background Art

[0002] In today's world, vehicles have become an indispensable means of transportation for people's work and life. With the shortage of oil resources and the development of technology, vehicles that are driven in whole or in part by electric energy are becoming more and more common.

[0003] During the manufacturing process of this type of vehicle, the charging function of the vehicle needs to be tested to ensure that the vehicle can be charged normally and effectively after leaving the factory.

[0004] Usually, the tester manually builds and configures the test environment to test the vehicle's charging function. For example, according to the test requirements, the charging device (such as a charging gun) is manually connected to the vehicle's charging socket, and the charging current is measured to test whether the vehicle can be charged normally. Summary of the invention

[0005] The inventors of the present disclosure recognize that the test efficiency is low due to the need to manually build a test environment to connect various test equipment to the vehicle (for example, connecting the charging equipment to the vehicle's charging socket, connecting the vehicle to a fault injection device, a data reading device, etc.). In particular, when multiple charging functions need to be tested, the test environment needs to be manually rebuilt or configured multiple times, and the test efficiency is further reduced. In addition, each time the test environment is built, it is necessary to frequently plug and unplug equipment such as charging guns, which may cause the wiring harness to loosen, thereby reducing the reliability of the test. In addition, in the case of high-voltage testing, etc., there is a risk of electric shock to the tester because the tester is required to manually operate the high-voltage equipment. In addition, by having the tester read the test current, voltage, etc. to determine whether the charging function is normal, there may also be a problem of inaccurate judgment of the test results due to reading errors by the tester.

[0006] The present disclosure aims to solve at least one problem existing in the prior art.

[0007] According to one aspect of the present disclosure, a vehicle testing device is provided for testing a charging function of a vehicle, the vehicle testing device comprising: a first test circuit, connected to a power supply interface of a charging device and a charging interface of a vehicle, respectively, the power supply interface charges the charging interface via the first test circuit, the first test circuit being configured to: in response to a test instruction for testing the charging function of the vehicle, change a connection state of the first test circuit to change a charging state of the power supply interface charging the charging interface.

[0008] According to another aspect of the present disclosure, a vehicle testing system is provided, comprising a vehicle testing device according to the present disclosure; a test control device, the test control device comprising: a vehicle control module, configured to generate a vehicle control signal for controlling the operation of a vehicle according to a test case for testing a charging function of a vehicle, so that the vehicle is in a test state capable of performing a test corresponding to the test case; and a vehicle testing device control module, configured to generate the test instruction for testing the charging function of the vehicle according to the test case, so that the vehicle testing device performs the test corresponding to the test case on the vehicle in the test state; and a test result acquisition device, configured to acquire the test result for the test case from the vehicle.

[0009] According to another aspect of the present disclosure, a vehicle testing method is provided, which uses a vehicle testing device according to the present disclosure to test a charging function of a vehicle, and the vehicle testing method includes: generating a vehicle control signal for controlling the operation of the vehicle according to a test case for testing the charging function of the vehicle, so that the vehicle is in a test state capable of performing a test corresponding to the test case; generating the test instruction for testing the charging function of the vehicle according to the test case, so that the vehicle testing device performs the test corresponding to the test case on the vehicle in the test state; and obtaining a test result for the test case from the vehicle.

[0010] According to yet another aspect of the present disclosure, a vehicle tested using the vehicle testing method according to the present disclosure is provided.

[0011] According to another aspect of the present disclosure, a vehicle test bench is provided, comprising: a bracket for supporting the vehicle test system according to the present disclosure; and a power control box for converting power from an external power supply to respectively power the vehicle test device and the test control device.

[0012] According to the present disclosure, the charging function of a vehicle can be tested efficiently, accurately and safely. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present disclosure will now be described in the following detailed description with reference to the accompanying drawings, wherein the same reference numerals throughout the drawings represent the same or similar components. It is to be understood that the drawings are not necessarily drawn to scale and that the drawings are only used to illustrate exemplary embodiments of the present disclosure and should not be considered as limiting the scope of the present disclosure. Among them:

[0014] Figure 1 An exemplary configuration block diagram of a vehicle test system according to an embodiment of the present disclosure is shown;

[0015] Figure 2An exemplary configuration block diagram of a vehicle test device according to an embodiment of the present disclosure is shown;

[0016] Figures 3 to 6 An exemplary circuit diagram of a first test circuit of a vehicle test device according to an embodiment of the present disclosure is shown;

[0017] Figure 7 and Figure 8 The test flow of an exemplary test case according to an embodiment of the present disclosure is shown;

[0018] Fig. 9 An exemplary flow chart showing a vehicle testing method according to an embodiment of the present disclosure; and

[0019] Fig.10 A schematic diagram of a vehicle test bench according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0020] Various exemplary embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. However, it should be understood that the description of various exemplary embodiments is merely illustrative and does not serve as any limitation to the technology of the present disclosure. Unless otherwise specifically stated, the relative arrangement, expressions and numerical values ​​of components and steps in the exemplary embodiments do not limit the scope of the present disclosure.

[0021] Figure 1 FIG. 1 is a block diagram showing an exemplary configuration of a vehicle test system 1000 according to an embodiment of the present disclosure.

[0022] like Figure 1 As shown, the vehicle testing system 1000 may include a vehicle testing device 1010 , a test control device 1040 , and a test result obtaining device 1070 .

[0023] In some embodiments, the vehicle test device 1010 can be connected to the power supply interface of the charging device 1020 and the charging interface of the vehicle 1030. The power supply interface of the charging device 1020 is connected to the charging interface of the vehicle 1030 via the vehicle test device 1010, so that the charging function of the vehicle 1030 is tested by the vehicle test device 1010. Figures 2 to 6 A vehicle test device according to the present disclosure is described in detail.

[0024] In some embodiments, the vehicle 1030 may be a vehicle that is at least partially powered by electricity, such as an electric vehicle or a hybrid vehicle. In addition, the vehicle 1030 may be configured as a sedan, a sports car, a truck, a bus, a commercial vehicle, a crossover vehicle, a recreational vehicle, etc. It should be understood that the technology of the present disclosure may be used in any of the above vehicles, and is not limited to a particular type.

[0025] In some embodiments, the charging interface of the vehicle 1030 may include a charging socket provided on the vehicle. In some embodiments, the charging interface may be an AC charging interface suitable for AC charging. In other embodiments, the charging interface may also be a DC charging interface suitable for DC charging. In addition, the vehicle 1030 may also have both a DC charging interface and an AC charging interface, or may realize AC charging and DC charging through one charging interface.

[0026] In some embodiments, the power supply interface of the charging device 1020 can provide power from a charging facility (not shown) such as a charging pile or a charging station. In some embodiments, the power supply interface of the charging device 1020 may include a charging plug. The charging plug may include an AC charging plug and / or a DC charging plug. For example, the charging plug may be an AC charging plug attached to the vehicle for providing AC power to the vehicle. The charging plug may also be a DC charging plug configured in a public charging facility (such as a charging pile) for providing DC power to the vehicle.

[0027] like Figure 1 As shown, the vehicle test system 1000 may further include a test control device 1040 for controlling the test of the charging function. The test control device 1040 may include a vehicle test device control module 1050 for controlling the vehicle test device 1010 and a vehicle control module 1060 for controlling the vehicle 1030 .

[0028] In some embodiments, the vehicle control module 1060 can be configured to generate a vehicle control signal for controlling the operation of the vehicle based on a test case for testing the charging function of the vehicle 1030, so that the vehicle is in a test state capable of performing a test corresponding to the test case.

[0029] In some embodiments, the vehicle test device control module 1050 may be configured to generate a test instruction for testing the charging function of the vehicle 1030 according to a test case, so that the vehicle test device 1010 performs a test corresponding to the test case on the vehicle 1030 in the test state.

[0030] like Figure 1 As shown, the vehicle testing system 1000 may further include a test result obtaining device 1070 configured to obtain a test result for a test case from the vehicle 1030 .

[0031] The vehicle test system 1000 disclosed in the present invention provides a test platform that integrates a vehicle test device 1010, a test control device 1040, and a test result acquisition device 1070. The vehicle test device 1010 is controlled by the test control device 1040 for testing. There is no need for the tester to manually configure the test environment, and the charging function corresponding to the test case can be automatically tested, thereby improving the test efficiency. In addition, the test results are obtained by the test result acquisition device 1070 without the need for the tester to manually read the test results, thereby avoiding the possible risk of high-voltage electric shock during manual reading and the problem of inaccurate test results caused by manual reading errors. Therefore, the charging function of the vehicle can be tested efficiently, accurately, and safely.

[0032] In the present disclosure, a test case may be, for example, a test case for verifying the effectiveness of one or more charging functions of the vehicle 1030 by specifying a series of operations of the vehicle 1030 and the vehicle testing device 1010. Figure 7 and Figure 8 The test flow of an exemplary test case according to an embodiment of the present disclosure is described in detail.

[0033] In some embodiments, the test case can be, for example, a software program code developed in a software environment, and the control of the vehicle 1030 and the vehicle test device 1010 is achieved by connecting the software environment with the corresponding hardware equipment. In some embodiments, the ECU-Test software environment can be used to develop test cases. The ECU-Test software includes an automated testing method that can implement test cases with different functions. In addition, the ECU-Test software can provide a variety of interfaces for expanding and integrating one or more test software and / or test hardware. It should be understood that the ECU-Test software described above is only an example, and those skilled in the art can use other software environments or software tools to develop test cases according to actual needs.

[0034] In some embodiments, the vehicle control module 1060, the vehicle test device control module 1050, and the test result acquisition device 1070 may be software or hardware integrated with the software environment of the test case. For example, the vehicle control module 1060, the vehicle test device control module 1050, and the test result acquisition module 1070 may be integrated with the ECU-Test software to perform corresponding operations under the control of the test case.

[0035] In some embodiments, the vehicle control module 1060 can generate a signal for controlling the on-board diagnostic system (OBD) of the vehicle 1030 as a vehicle control signal. In some embodiments, the vehicle control module 1060 can be implemented by calling the EDIABAS software tool. The software tool can be integrated in the ECU-Test software environment to generate a signal for controlling the OBD of the vehicle 1030 according to the test case. The EDIABAS software tool can be connected to the OBD interface of the vehicle 1030 through, for example, Ethernet, so as to send a vehicle control signal to the OBD of the vehicle 1030. In some embodiments, the vehicle control signal can, for example, control vehicle unlocking, vehicle locking, setting to normal mode, setting to diagnostic mode, performing PWF (parking / active / driving) control, SST (start button) control, and other functions related to testing of the charging function of the vehicle.

[0036] In some embodiments, the vehicle test device control module 1050 can generate a vehicle controller area network (Controller Area Network, CAN) signal as a test instruction for testing the charging function of the vehicle 1030. In some embodiments, the vehicle test device control module 1050 can be implemented by a CAN open environment (CANoe) integrated with ECU-Test and a corresponding hardware CAN Vector. Specifically, according to the test case, the CAN Vector is controlled by CANoe to generate a corresponding CAN signal, which is provided to the vehicle test device 1010 to change the test state of the vehicle test device 1010. Accordingly, the charging state of the power supply interface of the charging device 1020 to charge the charging interface of the vehicle 1030 can be changed, thereby realizing the test of the charging function of the vehicle 1030.

[0037] In some embodiments, the vehicle test device 1010 may include a switch, which can be turned on or off under the control of the test instruction, thereby changing the test state of the vehicle test device 1010. For example, when the switch is turned on, the vehicle test device 1010 can be in a straight-through test state, so that the power supply interface of the charging device 1020 is directly connected to the charging interface of the vehicle 1030, thereby charging. In addition, when the switch is turned off, the vehicle test device 1010 can be in a disconnected test state, so that the connection between the power supply interface of the charging device 1020 and the charging interface of the vehicle 1030 is disconnected, thereby ending charging.

[0038] In some embodiments, relays can be used as switches in the vehicle test device 1010. Relay control devices (such as DEDITEC chips) are connected to these relays, and the relay control device generates corresponding control signals according to the test instructions to control the connection or disconnection of the relays. It should be understood that those skilled in the art can also use other components with switch functions to implement the switches in the vehicle test device 1010 according to actual needs.

[0039] In some embodiments, the test result acquisition device 1070 can acquire the diagnostic data of the vehicle as the test result. The diagnostic data of the vehicle may include at least one of the vehicle's check control message (CCM) and the diagnostic trouble code (DTC). CCM can be acquired from the vehicle's OBD by the test result acquisition device 1070 through the EDIABAS software tool, for example. DTC can be acquired from the vehicle by the test result acquisition device 1070 through CANoe and the corresponding CAN Vector. In some embodiments, the test result acquisition device 1070 can acquire other vehicle CAN signals as test results. For example, the test result acquisition device 1070 can acquire vehicle CAN signals (such as FA CAN, AE CAN, CCU CAN, DC CAN, etc.) related to the test through CANoe and the corresponding CAN Vector. For some vehicle CAN signals, they can also be acquired by the test result acquisition device 1070 through the INCA test tool. In addition, the test result may also include both the diagnostic data of the vehicle and the vehicle CAN signal.

[0040] In some embodiments, the vehicle test system 1000 may further include a test analysis device configured to compare the test result with the expected test result of the test case to generate a test report indicating whether the test is passed. In some embodiments, the test analysis device may analyze the diagnostic data and / or vehicle CAN signal acquired by the test result acquisition device 1070 and compare it with the expected test result of the test case to determine whether the test is passed.

[0041] The vehicle test system 1000 disclosed in the present invention may include a test analysis device as described above, so that the test results can be automatically analyzed, and there is no need for the tester to read the test results (for example, observe the changes in the CAN signal, read the charging current value, read the detection voltage value, etc.) to determine whether the test is passed, and the test result reading error caused by manual reading can be avoided. In some cases, the error in the test result may be fleeting (for example, an abnormal value appears in the vehicle CAN signal), and manual reading may be difficult to find or ignore such errors. According to the vehicle test system 1000 disclosed in the present invention, since the test report is automatically generated according to the test results, the accuracy of the test can be improved. In addition, in the case of high-voltage testing, for example, there may be a risk of electric shock when the test results are manually read by the tester. According to the vehicle test system disclosed in the present invention, since the test report is automatically generated, there is no need for the tester to contact the high-voltage equipment, which can improve the safety of the test.

[0042] In some embodiments, the test report may include the status of each vehicle CAN signal related to the test. In addition, the test report may specify whether each test step in the test case has passed, thereby locating the specific test failure step, so as to make targeted modifications to the vehicle's charging function and improve test efficiency. In addition, the test report may also summarize the test results of multiple test cases and provide the test success rate of projects including multiple test cases, thereby providing testers with richer information.

[0043] In some embodiments, the vehicle testing system 1000 may further include a display device for displaying a test report. Thus, the test report may be displayed in real time during the test process so that the tester can observe the test report in real time and obtain the test results. In addition, after one or more tests are completed, a summary test report may be generated and displayed on the display device.

[0044] It should be understood that the various devices / modules included in the vehicle test system 1000 described above are only logical modules divided according to the specific functions they implement, and are not used to limit the specific implementation method. In actual implementation, the above-mentioned various devices / modules can be implemented as independent physical entities, or can also be implemented by a single entity (for example, a processor (CPU or DSP, etc.), an integrated circuit, etc.).

[0045] Next, refer to Figure 2 A block diagram illustrating an exemplary configuration of a vehicle test device 2000 according to the present disclosure is described.

[0046] like Figure 2As described above, the vehicle testing device 2000 may include a first testing circuit 2010. The first testing circuit 2010 may be connected to a power supply interface of a charging device and a charging interface of a vehicle respectively. The power supply interface is connected to the charging interface via the first testing circuit 2010.

[0047] In some embodiments, the first test circuit 2010 may be configured to, in response to a test instruction for testing a charging function of the vehicle, change a connection state of the first test circuit 2010 to change a charging state of the power supply interface to charge the charging interface.

[0048] In some embodiments, the vehicle testing device 2000 may correspond to, for example, the reference Figure 1 The vehicle test device 1010 is described as operating in response to a test instruction from the vehicle test device control module 1050. It should be understood that the vehicle test device 2000 may also operate in response to other test instructions.

[0049] According to the vehicle testing device 2000 disclosed in the present invention, the connection state of the test circuit is changed in response to a test instruction for testing the charging function of the vehicle, thereby changing the charging state of the power supply interface charging the charging interface, and different charging function tests can be performed without manually rebuilding or configuring the test environment, which can improve the test efficiency. In addition, the first test circuit 2010 is always connected to the power supply interface of the charging device and the charging interface of the vehicle, and the charging state is changed by changing the state of the first test circuit 2010. Therefore, there is no need to frequently plug and unplug the power supply interface and the charging interface during the test, which can avoid loosening of the wiring harness and improve the reliability of the test. In addition, since there is no need for manual operation by the tester, the risk of electric shock to the tester in the case of high-voltage operation can be avoided, which improves the safety of the test.

[0050] The following will refer to Figures 3 to 6 hereinafter is an exemplary circuit diagram of a first test circuit of a vehicle test device according to the present disclosure.

[0051] It should be understood that Figures 3 to 6 In the exemplary circuit diagram shown, for the sake of simplicity, only the elements and connections necessary for illustrating the embodiments according to the present disclosure are shown, and not all elements and connections are shown. Figures 3 to 6 The elements shown in the figure are exemplary rather than limiting and can be replaced as needed. Figures 3 to 6 One or more components in the exemplary circuit diagrams shown may be replaced with other components having similar functions.

[0052] In some embodiments, the first test circuit may include a switch, and a connection point of the power supply interface of the charging device is connected to a corresponding connection point of the charging interface of the vehicle via the switch. The first test circuit may turn the switch on or off in response to a test instruction, thereby changing the charging state of the power supply interface charging the charging interface. Figure 3 The first test circuit 3000 including the above switch is exemplarily shown.

[0053] It should be understood that, by way of example, Figure 3 The circuit diagram of the first test circuit 3000 connected to the AC charging interface and the AC power supply interface is illustrated, but the circuit of the first test circuit connected to the DC charging interface and the DC power supply interface can also be designed similarly.

[0054] like Figure 3 As shown, the first test circuit 3000 can be connected to the charging interface 3010 of the vehicle and the power supply interface 3020 of the charging device respectively. The power supply interface 3020 of the charging device may include multiple connection points, Figure 3 The three-phase voltage connection points L1, L2, L3, the neutral connection point N, the ground connection point PE, the connection confirmation point CC (Connection Confirm) and the control guide point CP (Control Piliar) are illustrated. In addition, the charging interface 3010 of the vehicle may include a plurality of connection points L1, L2, L3, N, PE, CC and CP corresponding to the power supply interface 4020 of the charging device.

[0055] The first test circuit 3000 may include switches 3030 to 3036 connected between a connection point of the power supply interface 3020 and a corresponding connection point of the charging interface 3010. Each switch 3030 to 3036 may be turned on or off in response to a test instruction, thereby turning on or off the connection between the corresponding connection points of the power supply interface 3020 and the charging interface 3010.

[0056] In some embodiments, relays may be used as switches in the first test circuit 3000. Relay control devices (e.g., DEDITEC chips) are connected to these relays, and the relay control devices generate corresponding control signals according to the test instructions to control the connection or disconnection of the relays. It should be understood that those skilled in the art may also use other components with switch functions to implement the switches in the first test circuit 3000 according to actual needs.

[0057] in addition, Figure 3The first test circuit 3000 is illustrated as including switches 3030-3036 that respectively connect all connection points of the power supply interface 3020 to corresponding connection points of the charging interface 3010. It should be understood that the first test circuit 3000 may also only include one or more switches connected between one or more pairs of connection points of the power supply interface 3020 and the charging interface 3010, for controlling the on-off between the one or more pairs of connection points.

[0058] According to the general standards of the power supply interface of the charging device and the charging interface of the vehicle, among the multiple connection points of the power supply interface and the charging interface, the connection confirmation point can be used to control whether to start charging. That is, when the connection confirmation points of the power supply interface and the charging interface are connected to each other, charging starts; when the connection confirmation points of the power supply interface and the charging interface are disconnected, charging ends.

[0059] In the present disclosure, by connecting the connection confirmation point of the power supply interface 3020 to the connection confirmation point of the charging interface 3010 via the switch 3035, the connection and disconnection between the above-mentioned connection confirmation points can be controlled by controlling the on and off of the switch 3035, thereby controlling the start and end of charging.

[0060] In some embodiments, the first test circuit may include a switch connected between two connection points in the power supply interface of the charging device. The first test circuit may turn the switch on or off in response to a test instruction. As a result, the state between the two connection points in the power supply interface changes, thereby changing the charging state of the power supply interface charging the charging interface. Figure 4 The first test circuit 4000 including the above switch is exemplarily shown.

[0061] like Figure 4 As shown, the first test circuit 4000 is connected to the charging interface 4010 of the vehicle and the power supply interface 4020 of the charging device respectively. The switches 4030-4036 of the first test circuit 4000 correspond to Figure 3 The switches 3030-3036 in the first test circuit 3000. In addition, according to the test requirements, the first test circuit 4000 may not include the switches 4030-4036 or only include one or more of the switches 4030-4036.

[0062] In addition, the first test circuit 5000 may include a switch 4037 connected between two connection points in the power supply interface 4020. By connecting the switch 4037 in this way, any two connection points in the power supply interface 4020 can be led to both ends of the switch 4037 of the first test circuit 4000. Furthermore, by controlling the on and off of the switch 4037, the control of the on or off of any two connection points in the power supply interface 4020 can be achieved.

[0063] As an example, Figure 4 A circuit diagram showing a switch 4037 connected between two connection points at both ends of the switch 4021 of the power supply interface 4020 is shown. The switch 4021 is a mechanical locking device in the power supply interface 4020. According to the locking state of the mechanical locking device, it is possible to determine whether the power supply interface 4020 is fully connected to the charging interface 4010. For example, when the mechanical locking device is locked (on), the power supply interface 4020 is fully connected to the charging interface 4010; when the mechanical locking device is unlocked (disconnected), the power supply interface 4020 is not fully connected to the charging interface 4010. In addition, the resistor 4022 is a resistor connected in parallel with the mechanical locking device.

[0064] exist Figure 4 In the example, since the first test circuit 4000 includes the switch 4037, the switch 4037 can be used to control the connection or disconnection of the mechanical locking device in the power supply interface 4020. Therefore, during the test, there is no need to manually operate the mechanical locking device of the charging device, which can improve the test efficiency and increase the safety of the test.

[0065] In some embodiments, the first test circuit may include a plurality of current test circuits, the plurality of current test circuits are connected in parallel between a ground point and a connection confirmation point in the power supply interface, and each of the plurality of current test circuits includes a resistor with a different resistance value. The first test circuit may be configured to: in response to a test instruction, connect one of the plurality of current test circuits and disconnect the other current test circuits in the plurality of current test circuits to provide a charging current corresponding to the one current test circuit. Figure 5 The first test circuit 5000 including the above-mentioned multiple current test circuits is exemplarily shown.

[0066] like Figure 5 As shown, the first test circuit 5000 is connected to the charging interface 5010 of the vehicle and the power supply interface 5020 of the charging device respectively. The switches 5030 to 5036 of the first test circuit 5000 correspond to Figure 3 The switches 3030-3036 in the test circuit 3000 are as follows. In addition, according to the test requirements, the first test circuit 5000 may not include the switches 5030-5036 or only include one or more of the switches 5030-5036.

[0067] In addition, the first test circuit 5000 may include a plurality of current test circuits. Figure 5Two current test circuits are illustrated, namely a first current test circuit including a resistor 5039 and a switch 5037 and a second current test circuit including a resistor 5040 and a switch 5038. The two current test circuits are connected in parallel between the ground point PE and the connection confirmation point CC of the power supply interface 5020, and the resistor 5039 and the resistor 5049 have different resistance values.

[0068] The first test circuit 5000 can respond to the test instruction to turn on the first current test circuit (for example, turn on the switch 5037) and turn off the second current test circuit (for example, turn off the switch 5038), thereby providing a current corresponding to the first current test circuit.

[0069] By appropriately configuring the resistance values ​​of resistor 5039 and resistor 5040, a current test circuit capable of providing different charging current values ​​can be obtained. For example, it can be configured so that the first current test circuit provides a charging current of 8A and the second current test circuit provides a charging current of 16A.

[0070] It should be understood that Figure 5 In the figure, the situation where the resistor 5039 and the resistor 5040 are arranged in the first test circuit 5000 is shown. However, in actual implementation, the resistor 5039 and the resistor 5040 can also be arranged in the power supply interface 5020 according to the situation.

[0071] In addition, the number of current test circuits provided by the first test circuit 5000 is not limited to two, and more than two current test circuits may be provided, each test circuit providing a different charging current. For example, four current test circuits may be provided as needed, providing charging currents of 8A, 16A, 32A, and 64A, respectively. In addition, only one current test circuit may be provided as needed.

[0072] In some cases, the charging currents provided by different charging piles may be different. In this embodiment, in order to test whether the vehicle can be charged normally according to the charging current provided by each charging pile, multiple current test circuits are set to provide multiple different charging currents, so as to test whether the vehicle can be charged normally when various charging currents are provided. As a result, there is no need to use multiple power supply devices (providing different charging currents) to perform multiple tests, and only one power supply device can be used to implement the test of the charging function.

[0073] In some embodiments, the current of the current detection circuit can be acquired by a current detector (e.g., a current sensor) and provided to the test result acquisition device 1070 of the vehicle test system 1000. In addition, the test analysis device can compare the acquired current with the expected test result to determine whether the test is passed and generate a test report.

[0074] In some embodiments, the first test circuit may include a voltage test circuit connected in series between a ground point and a connection confirmation point in the power supply interface. The first test circuit may be configured to: in response to a test instruction, obtain a voltage between the ground point and the connection confirmation point in the power supply interface via the voltage test circuit. Figure 6 The first test circuit 6000 including the above-mentioned voltage test circuit is exemplarily shown.

[0075] It should be understood that, by way of example, Figure 6 The circuit diagram of the first test circuit 6000 connected to the DC charging interface and the DC power supply interface is illustrated, but the circuit of the first test circuit connected to the AC charging interface and the AC power supply interface can also be designed similarly.

[0076] like Figure 6 As shown, the first test circuit 6000 can be connected to the charging interface 6010 of the vehicle and the power supply interface 6020 of the charging device respectively. The power supply interface 6020 of the charging device may include multiple connection points, Figure 6 The DC power connection points DC+, DC-, grounding point PE, auxiliary power connection points A+, A-, charging communication connection points S+, S-, and connection confirmation points CC1, CC2 are illustrated. In addition, the vehicle charging interface 6010 includes connection points DC+, DC-, PE, A+, A-, S+, S-, CC1, and CC2 corresponding to the power supply interface 6020 of the charging device, respectively.

[0077] exist Figure 6 In the embodiment, the first test circuit 6000 includes switches 6030-6038, which are respectively connected between corresponding connection points of the power supply interface 6020 and the charging interface 6010. It should be understood that, according to the test requirements, the first test circuit 6000 may also only include one or more switches connected between one or more pairs of connection points of the power supply interface 6020 and the charging interface 6010, for controlling the on-off between the one or more pairs of connection points.

[0078] like Figure 6 As shown, the first test circuit 6000 may include a voltage test circuit, which includes a switch 6039 and a resistor 6040, which are connected in series between the connection confirmation point CC2 and the grounding point PE of the power supply interface 6020. In response to the test instruction, the switch 6039 can be turned on, so that the voltage between the connection confirmation point CC2 and the grounding point PE can be obtained.

[0079] It should be understood that Figure 6 In the figure, the resistor 6040 is shown to be disposed in the first test circuit 6000 , but in actual implementation, the resistor 6040 may also be disposed in the power supply interface 6020 according to circumstances.

[0080] Similarly, the first test circuit 6000 may include a voltage test circuit connected in series between the connection confirmation point CC1 and the ground point PE of the power supply interface 6020. Through the voltage test circuit, the voltage between the connection confirmation point CC1 and the ground point PE can be obtained in the first test circuit 6000.

[0081] During the vehicle charging process, the voltage between the connection confirmation point CC1 and the grounding point PE (also called the voltage of detection point 1) is used by the power supply interface to determine whether the power supply interface is fully connected to the charging interface, and the voltage between the connection confirmation point CC2 and the grounding point PE (also called the voltage of detection point 2) is used by the vehicle to determine whether the charging interface is fully connected to the power supply interface.

[0082] In this embodiment, the voltage at detection point 1 and / or the voltage at detection point 2 can be obtained in the first test circuit 6000 to determine whether the power supply interface and the charging interface are fully connected.

[0083] In some embodiments, the voltage at detection point 1 and the voltage at detection point 2 may be measured by a voltage detector (e.g., a voltage sensor) and provided to the test result acquisition device 1070 of the vehicle test system 1000. In addition, the test analysis device may compare the voltage at detection point 1 and the voltage at detection point 2 as the test results with the expected test results to determine whether the test is passed, and generate a test report.

[0084] In addition, the voltage test circuit in the first test circuit 6000 can also be used as a current test circuit. By measuring the current flowing through the resistor 6040 when the switch 6039 is turned on, the current flowing through the connection confirmation point CC2 can be obtained. In a similar way, the current flowing through the connection confirmation point CC1 can be obtained. These currents can also be used to test the corresponding charging function.

[0085] Combination of the above Figures 3 to 6 Exemplary circuit diagrams of first test circuits 3000-6000 of a vehicle test device according to the present disclosure are described. It should be understood that part or all of the first test circuits 3000-6000 can be combined into one first test circuit to test multiple charging functions of a vehicle using one vehicle test device.

[0086] In the present disclosure, according to the test instruction, the connection state of the first test circuit is changed, thereby changing the connection state between the power supply interface and the charging interface. Thus, for example, there is no need to frequently plug and unplug the charging gun and the charging socket of the vehicle, which can avoid the loosening of the wiring harness, thereby avoiding the influence of the loose wiring harness on the test reliability.

[0087] In some embodiments, the vehicle testing device according to the present disclosure may further include a second test circuit. The second test circuit may be connected in series between the electronic control unit (ECU) of the vehicle and the control unit of the vehicle related to charging. The second test circuit may be configured to: in response to a test instruction for testing the charging function of the vehicle, change the connection state of the second test circuit to change the connection state between the electronic control unit and the control unit related to charging.

[0088] In some embodiments, the control unit related to charging may include at least one of a charging control unit (Charge Control Unit, CCU), a high voltage battery control unit (High Voltage Battery, HVB), and an electronic traction motor rear axle control unit (Traction Electric Machine Electronics Rear Axle, TEE).

[0089] In some embodiments, the second test circuit may include a switch that is turned on or off in response to a test instruction to connect or disconnect a connection between a control unit (eg, CUU, HVB, or TEE) related to charging and the ECU.

[0090] In the normal high-voltage power-on mode of the vehicle, by disconnecting the power supply signal of the control unit related to charging (such as CUU, HVB or TEE) (that is, disconnecting the connection between the control unit related to charging and the ECU), the vehicle is tested for high-voltage emergency power-off. This can determine whether the vehicle has leakage and whether the vehicle's high-voltage system is in a safe state.

[0091] According to this embodiment, the high-voltage test of the vehicle can be performed by changing the connection state of the second test circuit without manual operation, which can avoid the risk of electric shock to the tester and improve the safety of the test.

[0092] Next, we will combine Figure 7 and Figure 8 The test flow of the exemplary test case shown describes the specific test process of the vehicle test system of the present disclosure.

[0093] Figure 7 The test flow of an exemplary test case 7000 according to the present disclosure is shown. The test case 7000 is used to test whether the vehicle can be charged normally when the charging gun of the charging device is connected to the charging socket of the vehicle.

[0094] like Figure 7As shown, in step S7010, the vehicle is unlocked. In step S7020, the charging door of the vehicle is opened. Steps S7010 and S7020 are to put the vehicle in a test state capable of performing the test corresponding to test case 7000. Steps S7010 and S7020 may be performed under the control of vehicle control module 1060.

[0095] In some embodiments, the vehicle control module 1060 may generate a vehicle control signal according to step S7010 and step S7020 to control the operation of the vehicle so that the vehicle is unlocked and the charging door of the vehicle is opened. In some embodiments, the vehicle control module 1060 may provide the vehicle control signal for unlocking the vehicle and opening the charging door to the OBD of the vehicle through the EDIABAS software, thereby unlocking the vehicle and opening the door.

[0096] After step S7020, the vehicle is in a test state capable of performing a test corresponding to test case 7000. In this test state, a charging gun of a charging device can be connected to a charging port in a charging door of the vehicle to test whether the vehicle can be charged normally.

[0097] Next, in step S7030 , the charging gun is connected to the charging socket of the vehicle to test whether the charging function is normal. The operation of connecting the charging gun in step S7030 may be performed under the control of the vehicle test device control module 1050 .

[0098] In some embodiments, the vehicle test device control module 1050 may generate a test instruction for testing the charging function of the vehicle (in the case of test case 7000, whether the vehicle can be charged normally when the charging gun is connected to the charging socket) according to step S7030. Specifically, the test instruction is an instruction for the vehicle test device to connect the charging gun of the charging device to the charging socket of the vehicle. The vehicle test device may respond to the test instruction by changing the connection state of the first test circuit (for example, Figure 3 The switches 3030 to 3036 of the first test circuit 3000 are set to the on state), so that the charging gun is directly connected to the charging socket of the vehicle, which is equivalent to connecting the charging gun to the charging socket.

[0099] In some embodiments, the vehicle test device control module 1050 can generate corresponding CAN signals through CANoe and CAN Vector, and provide them to the vehicle test device, so that the charging state of the charging gun on the charging socket is changed to a state corresponding to the test case.

[0100] Next, in step S7040, it is determined whether the charging current is above a predetermined threshold value to determine whether the charging function is normal. The test result acquisition device 1070 can obtain the test result for the test case 7000, that is, the magnitude of the charging current, from the vehicle according to step S7040. The magnitude of the charging current can be obtained, for example, by a current detector. The test analysis device can compare the test result with the expected test result of the test case 7000 (that is, the predetermined threshold value) according to step S7040. When the charging current is above the predetermined threshold value, it is determined that the vehicle is charging normally and the test passes; when the charging current is less than the predetermined threshold value, it is determined that the vehicle is not charging normally and the test fails. In addition, Figure 7 The case where the predetermined threshold is 0.1A is illustrated in the figure, but it can also be set to other values ​​according to actual conditions.

[0101] In some embodiments, the test result acquisition device 1070 may not acquire the charging current, but acquire the CAN signal corresponding to the charging current through CANoe and CAN Vector. The test analysis device compares the acquired CAN signal with the expected CAN signal to determine whether the charging is normal.

[0102] Next, in step S7050, charging is stopped. In some embodiments, the vehicle test device control module 1050 generates a test instruction according to step S7050 to change the connection state of the first test circuit of the vehicle test device so that the charging gun of the charging device is disconnected from the charging socket of the vehicle to end charging. In some embodiments, the vehicle test device control module 1050 can generate corresponding CAN signals through CANoe and CAN Vector and provide them to the first test circuit of the vehicle test device to set the vehicle test device to a disconnected state (for example, disconnected). Figure 3 The switch 3035 of the first test circuit 3000 in the vehicle is turned on to disconnect the charging gun from the charging socket of the vehicle.

[0103] Through the test case 7000, it is possible to automatically test whether the vehicle can be charged normally. It should be understood that those skilled in the art can design other test cases according to actual needs to test other charging functions of the vehicle.

[0104] In some cases, it is necessary to inject faults into the vehicle to test whether corresponding processing can be performed when a vehicle fault occurs. Figure 8 The test flow of an exemplary fault injection test case 8000 according to the present disclosure is shown. Test case 8000 is used to test whether the vehicle can display fault information when the connection confirmation point CC is disconnected (i.e., a fault is injected into the vehicle) under normal charging; and whether the fault information on the vehicle can disappear when the connection confirmation point CC is restored.

[0105] Figure 8 Steps S8010 to S8030 in Figure 7 These correspond to steps S7010 to S7030 in the flowchart and will not be described in detail here.

[0106] Next, in step S8040, it is determined whether the charging current is above a predetermined threshold ( Figure 8 The predetermined threshold is 0.1A, and no fault information is displayed on the vehicle. The test result acquisition device 1070 can obtain the test result for the test case 8000 from the vehicle according to step S8040. The test result can include the magnitude of the charging current and the fault information. The magnitude of the charging current can be, for example, based on the Figure 7 In addition, the fault information (such as the check control information CCM) can be obtained from the vehicle's OBD by the test result acquisition device 1070 through the EDIABAS software tool. The test analysis device can compare the acquired charging current with the expected charging current (i.e., the predetermined threshold value), and compare the acquired fault information with the expected fault information (no fault information in step S8040), thereby making a judgment in step S8040.

[0107] If it is determined in step S8040 that the charging current is above the predetermined threshold and no fault information is displayed on the vehicle (step S8040 is "yes"), it indicates that the vehicle is in a normal charging state, and the process proceeds to step S8050. In addition, if it is determined in step S8040 that the charging current is less than the predetermined threshold or fault information is displayed on the vehicle (step S8040 is "no"), it indicates that the vehicle charging state is abnormal, and the process proceeds to step S8090 to generate a test report.

[0108] Next, in step S8050 , fault injection is performed, that is, disconnecting the connection confirmation point CC between the power supply interface and the charging interface. This step can be performed under the control of the vehicle test device control module 1050 .

[0109] In some embodiments, the vehicle test device control module 1050 may generate a test instruction for disconnecting the connection confirmation point CC according to step S8050. The vehicle test device may respond to the test instruction, for example, disconnect Figure 3 The switch 3035 of the first test circuit 3000 in FIG.

[0110] Next, in step S8060, it is determined whether the charging current is less than a predetermined threshold and whether fault information is displayed on the vehicle. Step S8060 may be performed similarly to step S8040. Specifically, the test result acquisition device 1070 may acquire the test result for the test case 8000 from the vehicle according to step S8060. The test result may include the magnitude of the charging current and the fault information. The magnitude of the charging current may be determined according to the value of the vehicle. Figure 7 In addition, the fault information (such as check control information CCM) can be obtained from the OBD of the vehicle by the test result acquisition device 1070 through the EDIABAS software tool. The test analysis device can compare the size of the acquired charging current with the size of the expected charging current (i.e., the predetermined threshold), and compare the acquired fault information with the expected fault information (fault information code CCM802 in step S8060), so as to make a judgment in step S8060. Fault information code CCM802 indicates that the charging gun is not fully inserted and the charging gun is not locked.

[0111] If it is determined in step S8060 that the charging current is less than the predetermined threshold and fault information (i.e., CCM802) is displayed on the vehicle (step S8060 is "yes"), it indicates that the vehicle can perform processing corresponding to the fault (i.e., disconnecting CC), and the process proceeds to step S8070. In addition, if it is determined in step S8060 that the charging current is above the predetermined threshold or fault information is not displayed on the vehicle (step S8060 is "no"), it indicates that there is an abnormality in the fault processing of the vehicle, and the process proceeds to step S8090 to generate a test report.

[0112] Next, in step S8070 , the connection confirmation point CC between the power supply interface and the charging interface is restored. This step may be performed under the control of the vehicle test device control module 1050 .

[0113] In some embodiments, the vehicle test device control module 1050 may generate a test instruction for restoring the connection of the connection confirmation point CC according to step S8070. The vehicle test device may respond to the test instruction, for example, Figure 3 The switch 3035 of the first test circuit 3000 is turned on.

[0114] Next, in step S8080, it is determined whether the charging current is above a predetermined threshold and the fault information on the vehicle disappears. Step S8080 can be performed similarly to step S8040, for example. In the case where it is determined in step S8080 that the charging current is above a predetermined threshold and the fault information on the vehicle disappears (step S8080 is "yes"), it indicates that the vehicle can perform corresponding processing after the fault is eliminated (i.e., CC is restored), and the process proceeds to step S8090 to generate a test report. In addition, in the case where it is determined in step S8080 that the charging current is less than a predetermined threshold or the fault information on the vehicle does not disappear (step S8080 is "no"), it indicates that there is an abnormality in the fault processing of the vehicle, and the process proceeds to step S8090 to generate a test report.

[0115] Through the test case 8000, it is possible to automatically test whether the corresponding processing can be performed when a vehicle fails. It should be understood that those skilled in the art can design other fault injection test cases according to actual needs to test other charging functions of the vehicle.

[0116] In addition, the above reference Figure 7 and Figure 8 Exemplary test cases 7000 and 8000 are described, which are related to tests performed by a first test circuit of a vehicle test device. It should be understood that those skilled in the art can design test cases related to a second test circuit of a vehicle test device according to test requirements.

[0117] Next, refer to Fig. 9 An exemplary flow chart of a vehicle testing method 9000 according to an embodiment of the present disclosure is described. The vehicle testing method 9000 may be used, for example, to Figure 1 The vehicle test system shown.

[0118] like Fig. 9 As shown, in step S9010, based on a test case for testing the charging function of the vehicle, a vehicle control signal for controlling the operation of the vehicle is generated, so that the vehicle is in a test state capable of performing a test corresponding to the test case. In step S9020, based on the test case, a test instruction for testing the charging function of the vehicle is generated, so that the vehicle testing device performs a test corresponding to the test case on the vehicle in the test state. In step S9030, the test result for the test case is obtained from the vehicle. The above steps S9010 to S9030 can be respectively referred to above. Figure 1 The vehicle control module 1060, the vehicle test device control module 1050 and the test result acquisition device 1070 of the vehicle test system 1000 described above are executed.

[0119] In some embodiments, the vehicle testing method 9000 according to the present disclosure may further include: comparing the test result with the expected test result of the test case to generate a test report indicating whether the test is passed. This step may be performed by the test analysis device described above, for example.

[0120] The vehicle testing method provided in the embodiment of the present disclosure and the vehicle testing system described above belong to the same inventive concept and can be executed by the vehicle testing system provided in any embodiment of the present disclosure. For technical details not fully described in this embodiment, please refer to the vehicle testing system provided in the embodiment of the present disclosure, and will not be repeated here.

[0121] In some embodiments, a vehicle testing method according to an embodiment of the present disclosure may be used to test a vehicle to verify the effectiveness of the charging function of the vehicle.

[0122] Fig.10 A schematic diagram of a vehicle test bench 10000 according to an embodiment of the present disclosure is shown.

[0123] like Fig.10 As shown, the vehicle test bench 10000 may include a bracket 10010 for supporting the vehicle test system according to the embodiment of the present disclosure. According to the test requirements, each module of the vehicle test system may be respectively arranged on a plurality of brackets of the vehicle test bench 10000 .

[0124] In addition, the vehicle test bench 10000 may include a power control box 10020 for converting power from an external power source to respectively power a vehicle test device and a test control device of the vehicle test system. In some embodiments, the power control box 10020 may be connected to a 380V external AC power source to convert the AC power to provide a 12V DC voltage to the vehicle test device and a 220V AC voltage to the test control device.

[0125] In some embodiments, the vehicle test bench 10000 may further include an emergency stop button 10030 for powering off the vehicle test system in an emergency.

[0126] In addition, the vehicle test bench 10000 may further include a wire duct 10040 located on both sides of the vehicle test bench 10000 for accommodating wiring of the vehicle test device and the test control device.

[0127] By installing the vehicle test system of the present disclosure on the vehicle test bench 10000 , the vehicle test system of the present disclosure can be conveniently tested.

[0128] The terms used herein are only for describing specific exemplary embodiments and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular forms of "one" and "the" used herein are intended to include plural forms as well. It should also be understood that when the word "including" is used in this article, it indicates the existence of the indicated features, wholes, steps, operations, units and / or components, but does not exclude the existence or increase of one or more other features, wholes, steps, operations, units and / or components and / or their combinations. In addition, in the description of the present disclosure, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or order. In addition, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is two or more.

[0129] References to "embodiments" or similar expressions in this specification refer to specific features, structures, or characteristics described in conjunction with the embodiment as being included in at least one specific embodiment of the present disclosure. Therefore, the appearance of "in an embodiment of the present disclosure" and similar expressions in this specification does not necessarily refer to the same embodiment.

[0130] Those skilled in the art will appreciate that the present disclosure may be implemented in various forms, such as a complete hardware embodiment, a complete software embodiment (including firmware, resident software, microprogram code, etc.), or a combination of software and hardware, which will be referred to below as a "circuit," "module," or "system." In addition, the present disclosure may also be implemented in any tangible media form as a computer program product having a computer-usable program code stored thereon.

[0131] The relevant description of the present disclosure is described with reference to the flowchart and / or block diagram of the system, device, method and computer program product according to the specific embodiment of the present disclosure. It can be understood that each block in each flowchart and / or block diagram, and any combination of blocks in the flowchart and / or block diagram, can be implemented using computer program instructions. These computer program instructions can be executed by a machine composed of a processor of a general-purpose computer or a special computer or other programmable data processing device, and the instructions are processed by a computer or other programmable data processing device to implement the functions or operations described in the flowchart and / or block diagram.

[0132] The accompanying drawings show the flow charts and block diagrams of the architecture, functions and operations that can be implemented by the systems, devices, methods and computer program products according to various embodiments of the present disclosure. Therefore, each block in the flow chart or block diagram can represent a module, segment, or part of the program code, which includes one or more executable instructions to implement the specified logical function. It should also be noted that in some other embodiments, the functions described in the blocks may not be performed in the order shown in the figure. For example, two blocks connected to each other in the figure can actually be executed simultaneously, or in some cases according to the functions involved, they can also be executed in the opposite order of the icons. It should also be noted that each block diagram and / or flow chart block, as well as the combination of blocks in the block diagram and / or flow chart, can be implemented by a system based on special hardware, or by a combination of special hardware and computer instructions to perform specific functions or operations.

[0133] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements to market technologies, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A vehicle testing device for testing a charging function of a vehicle, the vehicle testing device comprising: a first test circuit, connected to a power supply interface of a charging device and a charging interface of a vehicle, respectively, wherein the power supply interface charges the charging interface via the first test circuit; The first test circuit is configured to: in response to a test instruction for testing a charging function of a vehicle, change a connection state of the first test circuit to change a charging state of the power supply interface charging the charging interface, The first test circuit includes a plurality of current test circuits, the plurality of current test circuits are connected in parallel between a ground point and a connection confirmation point in the power supply interface, and each of the plurality of current test circuits includes a switch and resistors with different resistance values. The first test circuit is configured to: in response to the test instruction, turn on the switch of one current test circuit among the multiple current test circuits so that the one current test circuit is turned on, and turn off the switches of other current test circuits among the multiple current test circuits so that the other current test circuits are turned off, thereby providing a charging current corresponding to the one current test circuit.

2. The vehicle testing device according to claim 1, wherein: The switch is connected between a connection point of the power supply interface and a corresponding connection point of the charging interface.

3. The vehicle testing device according to claim 2, wherein: The connection point includes a connection confirmation point, The switch is turned on or off in response to the test instruction to connect or disconnect the connection confirmation point of the power supply interface and the connection confirmation point of the charging interface.

4. The vehicle testing device according to claim 1, wherein: The switch is connected between two connection points in the power supply interface.

5. The vehicle testing device according to claim 4, wherein: The two connection points are the connection points at both ends of the mechanical locking device in the power supply interface, The switch is turned on or off in response to the test instruction to turn the mechanical locking device on or off.

6. The vehicle testing device according to claim 1, wherein: The first test circuit includes a voltage test circuit, and the voltage test circuit is connected in series between a ground point and a connection confirmation point in the power supply interface. The first test circuit is configured to obtain, in response to the test instruction, a voltage between a ground point and a connection confirmation point in the power supply interface via the voltage test circuit.

7. The vehicle testing device according to claim 1, further comprising: a second test circuit, the second test circuit being connected in series between the electronic control unit of the vehicle and a control unit of the vehicle related to charging, The second test circuit is configured to change a connection state of the second test circuit in response to a test instruction for testing a charging function of a vehicle, so as to change a connection state between an electronic control unit and a control unit related to charging.

8. The vehicle testing device according to claim 7, wherein: The control unit related to charging includes at least one of a charging control unit, a high-voltage battery control unit, and an electronic traction motor rear axle control unit.

9. A vehicle testing system comprising: The vehicle testing device according to any one of claims 1 to 8; A test control device, the test control device comprising: a vehicle control module configured to generate a vehicle control signal for controlling the operation of the vehicle according to a test case for testing a charging function of the vehicle, so that the vehicle is in a test state capable of performing a test corresponding to the test case; and a vehicle test device control module configured to generate the test instruction for testing the charging function of the vehicle according to the test case, so that the vehicle test device performs the test corresponding to the test case on the vehicle in the test state; and The test result acquisition device is configured to acquire the test result for the test case from the vehicle.

10. The vehicle testing system according to claim 9, wherein: The vehicle control module generates a signal for controlling an on-board diagnostic system of the vehicle as the vehicle control signal.

11. The vehicle testing system according to claim 9, wherein: The vehicle testing device control module generates a vehicle controller area network signal as the testing instruction.

12. The vehicle testing system according to claim 9, wherein: The test result acquisition device acquires at least one of the vehicle's diagnostic data and a vehicle controller area network signal as the test result.

13. The vehicle testing system according to claim 9, further comprising: The test analysis device is configured to compare the test result with the expected test result of the test case to generate a test report indicating whether the test is passed.

14. The vehicle testing system according to claim 13, further comprising: The display device is used to display the test report.

15. A vehicle testing method, using the vehicle testing device according to any one of claims 1 to 8 to test a charging function of a vehicle, the vehicle testing method comprising: generating a vehicle control signal for controlling the operation of the vehicle according to a test case for testing a charging function of the vehicle so that the vehicle is in a test state capable of performing a test corresponding to the test case; generating the test instruction for testing the charging function of the vehicle according to the test case, so that the vehicle testing device performs the test corresponding to the test case on the vehicle in the test state; as well as A test result for the test case is obtained from the vehicle.

16. The vehicle testing method according to claim 15, further comprising: The test result is compared with the expected test result of the test case to generate a test report indicating whether the test passes.

17. A vehicle tested using the vehicle testing method according to claim 15 or 16.

18. A vehicle test bench, comprising: A bracket for supporting a vehicle testing system according to any one of claims 9 to 14; as well as The power control box is used to transform the power from the external power supply to supply power to the vehicle test device and the test control device respectively.

19. The vehicle test bench according to claim 18, further comprising: An emergency stop button, used to cut off power to the vehicle test system in an emergency; as well as The wire ducts are located on both sides of the vehicle test bench and are used to accommodate the wiring of the vehicle test device and the test control device.

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