A durability test method for a dual-motor hybrid power system

Abstract

The present application relates to the technical field of testing of machine components, and particularly to a durability testing method for a dual-motor hybrid power system. The method includes controlling the operating parameters of the hybrid power system to obtain multiple application modes of the hybrid power system and the corresponding operating conditions of the application modes; performing corresponding system adjustment modes between two adjacent application modes to eliminate test errors; and repeatedly executing the above steps until the number of repetitions reaches a preset threshold. The present application improves the reliability of the comprehensive evaluation result of the durability test of the hybrid power system, shortens the test cycle of the whole vehicle, improves the development efficiency of the whole vehicle, and reduces the development cost.

Description

Technical Field

[0001] This application relates to the technical field of testing machine components, and particularly to a durability testing method for a dual-motor hybrid power system. Background Art

[0002] A hybrid electric vehicle (HEV) is one of the transportation tools that replace traditional vehicles to solve emission problems. The hybrid power system of a hybrid electric vehicle is the core component of the HEV, and its reliability directly affects the reliability of the entire vehicle. Therefore, the detection of the durability performance of the hybrid power system is crucial in the manufacture of hybrid electric vehicles.

[0003] Automobile manufacturers are more concerned about the comprehensive durability performance of the hybrid power system when installed on the entire vehicle. The existing testing methods for hybrid power system test benches represent the comprehensive durability performance of the series-parallel HEV hybrid power system by separately testing the performance of each component inside the hybrid power system. They cannot accurately reflect and evaluate the comprehensive durability performance of the hybrid power system after the integration of the entire vehicle system. The reliability of the comprehensive evaluation results is low, and there are problems such as long road test cycles, low efficiency, and high costs. Summary of the Invention

[0004] Aiming at the defects of the existing technology in the testing of series-parallel HEV hybrid power systems, the present invention proposes a durability testing method for a dual-motor hybrid power system, which conducts durability assessment on the integrated hybrid power system on a test bench to shorten the entire vehicle test cycle, improve development efficiency, and reduce development costs.

[0005] In a first aspect, this application provides a durability testing method for a dual-motor hybrid power system, including controlling the operating parameters of the hybrid power system to obtain multiple application modes of the hybrid power system and the operating conditions corresponding to the application modes;

[0006] Performing a corresponding system adjustment mode between two adjacent application modes to eliminate test errors;

[0007] Repeatedly execute the above steps until the number of repetitions reaches a preset threshold.

[0008] Further, the operating parameters of the hybrid power system include the torque, speed, and operating time of the components inside the hybrid power system;

[0009] The components inside the hybrid power system include an engine, a drive motor, and a generator;

[0010] The application modes include pure electric mode, parked power generation mode, parallel mode, engine drive mode, energy recovery mode, and reverse mode.

[0011] Furthermore, the pure electric mode includes controlling the engine to shut down and obtaining the operating conditions of the drive motor under alternating high and low torques, including

[0012] Controlling the torque of the drive motor to 180 N·m, controlling the speed of the drive motor to 3000 rpm, and controlling the operating time of the drive motor to 50 s to obtain the operating conditions of the drive motor under high torque;

[0013] Controlling the torque of the drive motor to 75 N·m, the speed to 3000 rpm, and the operating time to 450 s to obtain the operating conditions of the drive motor under low torque.

[0014] Furthermore, the parking power generation mode includes obtaining the operating conditions of the generator and the engine under high torque and rated torque, including

[0015] Controlling the torque of the generator to 79 N·m, controlling the speed of the generator to 6000 rpm, and controlling the operating time of the generator to 50 s; controlling the torque of the engine to 196 N·m, controlling the speed of the engine to 2420 rpm, and controlling the operating time of the engine to 50 s to obtain the operating conditions of the generator and the engine under high torque;

[0016] Controlling the torque of the generator to 35 N·m, controlling the speed of the generator to 6000 rpm, and controlling the operating time of the generator to 500 s; controlling the torque of the engine to 86 N·m, controlling the speed of the engine to 2420 rpm, and controlling the operating time of the engine to 500 s to obtain the operating conditions of the generator and the engine under rated torque operation.

[0017] Furthermore, the parallel mode includes

[0018] Controlling the torque of the engine to 196 N·m, controlling the speed of the engine to 3000 rpm, and controlling the operating time of the engine to 190 s;

[0019] Controlling the torque of the drive motor to 28 N·m, controlling the speed of the drive motor to 8464 rpm, and controlling the operating time of the drive motor to 190 s;

[0020] Controlling the torque of the generator to 0 N·m, controlling the speed of the generator to 7428 rpm, and controlling the operating time of the generator to 190 s.

[0021] Furthermore, the engine drive mode includes

[0022] Control the torque of the engine to 196 N.m, control the speed of the engine to 3000 rpm, and control the running time of the engine to 740 s;

[0023] Control the torque of the drive motor to 0 N.m, control the speed of the drive motor to 8464 rpm, and control the running time of the drive motor to 740 s;

[0024] Control the torque of the generator to 0 N.m, control the speed of the generator to 7428 rpm, and control the running time of the generator to 740 s.

[0025] Furthermore, the energy recovery mode includes

[0026] Control the torque of the engine to 0 N.m, control the speed of the engine to 800 rpm, and control the running time of the engine to 260 s;

[0027] Control the torque of the drive motor to -75 N.m, control the speed of the drive motor to 3000 rpm, and control the running time of the drive motor to 260 s;

[0028] Control the torque of the generator to 0 N.m, control the speed of the generator to 1980 rpm, and control the running time of the generator to 260 s;

[0029] Furthermore, the reverse mode includes

[0030] Control the engine to stop, control the torque of the drive motor to 135 N.m, control the speed of the drive motor to -2800 rpm, and control the running time of the engine and the drive motor to 25 s;

[0031] Control the torque of the generator to 0 N.m, the speed of the generator to 0 rpm, and the running time of the generator to 25 s.

[0032] In a second aspect, the present application provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the method steps described in any one of the first aspects are implemented.

[0033] In a third aspect, the present application provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the method steps described in any one of the first aspects are implemented.

[0034] Beneficial effects

[0035] This application first divides the durability performance test of a complex hybrid power system into multiple application modes, constructs different application modes by controlling the operating parameters of the hybrid power system, so as to obtain the corresponding operating conditions of the hybrid power system in different application modes; in order to improve the reliability of the test, this application executes the corresponding system adjustment mode between two adjacent application modes to eliminate test errors, thereby improving the reliability of the durability test results; finally, by repeatedly executing the above steps until the number of repetitions reaches a preset threshold, the durability performance test results of the hybrid power system are obtained. Compared with the traditional test method of obtaining the comprehensive durability performance of the system by separately testing the durability performance of the internal parts of the system, the overall evaluation results obtained by this application are more reliable. At the same time, since this application conducts durability assessment on the integrated hybrid power system on the test bench, it shortens the test cycle of the whole vehicle, improves the development efficiency of the whole vehicle, and reduces the development cost. Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions of the embodiments of this application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0037] Figure 1 It is a schematic flow chart of the method provided in Embodiment 1 of this application Figure 1 ;

[0038] Figure 2 It is a schematic diagram of the equipment structure of the test bench in Embodiment 1 of this application;

[0039] Figure 3 It is a schematic flow chart of the method provided in Embodiment 1 of this application Figure 2 ;

[0040] Figure 4 It is a schematic diagram of the electronic structure equipment in Embodiment 2 of this application. Detailed Embodiments

[0041] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the drawings in the embodiments of this application.

[0042] Embodiment 1

[0043] Combined with the attached Figure 1 , Embodiment 1 provides a durability test method for a dual-motor hybrid power system. The method mainly includes:

[0044] Control the operating parameters of the hybrid power system to obtain multiple application modes of the hybrid power system and the corresponding operating conditions of the application modes;

[0045] Execute the corresponding system adjustment mode between two adjacent application modes to eliminate test errors;

[0046] Loop and execute the above steps until the number of times of the loop reaches a preset threshold.

[0047] Combined with the attached Figure 2 , in Embodiment 1, a durability performance test is carried out on a hybrid power system bench, and the hybrid power system bench includes

[0048] A hybrid power assembly module, including a motor, a gearbox and an engine connected by a mechanical structure, and a motor and a power battery connected by a high-voltage wire; used to receive and run the corresponding application mode according to a test instruction;

[0049] The engine is connected with an EMS engine management system, which is used to control the engine test parameters and obtain the engine test result data;

[0050] The gearbox is connected with a transmission controller TCU, which is used to control the gearbox test parameters and obtain the test result data of the gearbox; the gearbox is a dual-machine integrated gearbox;

[0051] The power battery is connected with a BMS battery management system, which is used to control the power battery test parameters and obtain the test result data of the power battery;

[0052] The motor includes a generator and a drive motor, and the generator and the drive motor are connected with an MCU motor controller, which is used to control the generator and the drive motor test parameters and obtain the test results of the generator and the drive motor;

[0053] The engine, the gearbox, the power battery and the motor are respectively connected to a cooling system, which is used to control the temperature of the hybrid power module within a safe operating range;

[0054] A VCU / bench control module, which is connected to the hybrid power assembly module through a local area network CAN, and is used to transmit and monitor the test instructions of the hybrid power assembly module;

[0055] A control platform, the VCU / bench control module is sequentially connected to the gearbox through the control platform and a dynamometer, and is used to monitor test data and send control instructions to the VCU / bench control module;

[0056] The operating parameters of the hybrid power system include the torque and speed of the engine, the drive motor and the generator;

[0057] The application modes include a pure electric mode, a parking power generation mode, a parallel mode, an engine drive mode, an energy recovery mode, and a reverse mode.

[0058] Combined with the attached Figure 3 , the specific implementation is as follows:

[0059] S1. Obtain the operating conditions in pure electric mode.

[0060] The pure electric mode includes a torque alternating working mode, that is, a mode in which the drive motor alternately works at high load and low load torques.

[0061] Obtain the operating conditions of the drive motor under torque alternation at high load and low load when the engine is not working, specifically including:

[0062] S101. The control platform issues a control instruction, and the hybrid power system enters the pure electric mode.

[0063] S102. Control the engine to stop.

[0064] S103. Control the torque of the drive motor to be 180 N·m, the speed to be 3000 rpm, and the running time to be 50 s.

[0065] S104. Control the torque of the drive motor to be 75 N·m, the speed to be 3000 rpm, and the running time to be 450 s.

[0066] S105. Repeat steps S103 and S104 twice.

[0067] The control platform issues a control instruction to the VCU / bench control module through the local area network. The VCU / bench control module issues a control instruction to enter the pure electric mode to the EMS engine management system and the MCU motor controller through the local area network. The EMS engine management system controls the connected engine to stop. The MCU motor controller controls the connected drive motor to run at a torque of 180 N·m and a speed of 3000 rpm for 50 s; then run at a torque of 75 N·m and a speed of 3000 rpm for 450 s; the above torque alternation runs 2 times for a total of 1000 s to obtain the operating conditions of the hybrid power system when the engine is not working and the drive motor alternately works at high load and low load torques.

[0068] S2. Execute system adjustment mode 1.

[0069] Eliminate the test error caused by entering the parking power generation mode from the pure electric mode, specifically including:

[0070] S201. The control platform issues a control instruction, and the hybrid power system enters the shutdown mode.

[0071] S202. Control the torque and speed of the drive motor to be 0.

[0072] The control platform sends control commands to the VCU / bench control module via the local area network. The VCU / bench control module sends control commands to enter the pure electric mode to the EMS engine management system and the MCU motor controller via the local area network. The EMS engine management system controls the engine connected to it to shut down; the MCU motor controller controls the drive motor connected to it so that both the torque and speed are 0;

[0073] S3. Obtain the operating conditions in the parked power generation mode,

[0074] The parked power generation mode includes the series mode. In the parked power generation mode, the vehicle is in a stationary state;

[0075] Obtain the operating conditions of the generator and the engine when operating at high torque and rated torque respectively. Specifically,

[0076] S301. The control platform issues a control command, and the hybrid system enters the parked power generation mode 1;

[0077] S302. The engine shuts down to generate power;

[0078] S303. Control the generator torque to be 79 N.m, the speed to be 6000 rpm, and the running time to be 50 s; control the engine torque to be 196 N.m, the speed to be 2420 rpm, and the running time to be 50 s; obtain the operating conditions of the generator and the engine when operating at high torque;

[0079] S304. The control platform issues a control command, and the hybrid system enters the parked power generation mode 2;

[0080] S305. Control the generator torque to be 35 N.m, the speed to be 6000 rpm, and the running time to be 500 s; control the engine torque to be 86 N.m, the speed to be 2420 rpm, and the running time to be 500 s; obtain the operating conditions of the generator and the engine when operating at rated torque;

[0081] S4. Execute system adjustment mode 2,

[0082] Make the control drive motor and the generator run at high speed to eliminate the test error caused by entering the parallel mode from the parked power generation mode. Specifically,

[0083] S401. The control platform issues a control command, and the hybrid system enters system adjustment mode 2;

[0084] S402. Control the engine torque to be 196 N.m, the speed to be 3000 rpm; control the drive motor torque to be 28 N.m, the speed to be 8464 rpm; control the generator torque to be 0 N.m, the speed to be 7428 rpm;

[0085] S5. Obtain the operating conditions in the parallel mode,

[0086] Obtain the operating conditions during medium and high vehicle speeds in parallel mode, specifically including

[0087] S501. The control platform issues a control instruction, and the hybrid power system enters the parallel mode;

[0088] S502. Control the engine torque to 196 N·m and the speed to 3000 rpm, and control the running time of the engine to 190 s; control the driving motor torque to 28 N·m and the speed to 8464 rpm, and control the running time of the driving motor to 190 s; control the generator torque to 0 N·m and the speed to 7428 rpm, and the running time to 190 s;

[0089] S6. Execute system adjustment mode 3

[0090] Reduce the driving motor torque to 0 to eliminate the test error caused by entering the engine driving mode from the parallel mode, specifically including:

[0091] S601. The control platform issues a control instruction, and the hybrid power system enters system adjustment mode 3;

[0092] S602. Control the engine torque to 196 N·m and the speed to 3000 rpm; control the driving motor torque to 0 N·m and the speed to 8464 rpm; control the generator torque to 0 N·m and the speed to 7428 rpm; the running time is 190 s;

[0093] S7. Obtain the operating conditions in the engine driving mode

[0094] Obtain the operating conditions when the torques of the driving motor and the generator are both 0 in the engine driving mode, specifically including

[0095] S701. The control platform issues a control instruction, and the hybrid power system enters the engine driving mode;

[0096] S702. Control the engine torque to 196 N·m and the speed to 3000 rpm, and control the running time of the engine to 740 s; control the driving motor torque to 0 N·m and the speed to 8464 rpm, and control the running time of the driving motor to 740 s; control the generator torque to 0 N·m and the speed to 7428 rpm, and the running time to 740 s;

[0097] S8. Execute system adjustment mode 4

[0098] Reduce the torques of the engine, the driving motor, and the generator to 0 to eliminate the test error caused by entering the energy recovery mode from the engine driving mode, specifically including

[0099] S801, the control platform issues a control instruction, and the hybrid system enters system adjustment mode 4;

[0100] S802, control the engine torque to 0 N.m and the speed to 800 rpm; control the drive motor torque to 0 N.m and the speed to 3000 rpm; control the generator torque to 0 N.m and the speed to 1980 rpm;

[0101] S9, obtain the operating conditions in the energy recovery mode,

[0102] Obtain the operating conditions when the engine is idling in the energy recovery mode, specifically including,

[0103] S901, the control platform issues a control instruction, and the hybrid system enters the energy recovery mode;

[0104] S902, control the engine torque to 0 N.m and the speed to 800 rpm, and control the running time of the engine to 260 s; control the drive motor torque to -75 N.m and the speed to 3000 rpm, and control the running time of the drive motor to 260 s; control the generator torque to 0 N.m and the speed to 1980 rpm, and the running time to 260 s;

[0105] S10, execute system adjustment mode 5,

[0106] Control the engine, drive motor, and generator to stop working completely to eliminate the test error caused by entering the reverse mode from the energy recovery mode, specifically including,

[0107] S1001, the control platform issues a control instruction, and the hybrid system enters system adjustment mode 5;

[0108] S1002, control the engine torque to 0 N.m and the speed to 0 rpm; control the drive motor torque to 0 N.m and the speed to 0 rpm; control the generator torque to 0 N.m and the speed to 0 rpm;

[0109] S11, obtain the operating conditions in the reverse mode,

[0110] Obtain the operating conditions when both the engine and the generator are stopped in the reverse mode, specifically including:

[0111] S1101, the control platform issues a control instruction, and the hybrid system enters the reverse mode;

[0112] S1102, control the engine to stop; control the drive motor torque to 135 N.m and the speed to -2800 rpm; control the generator torque to 0 N.m and the speed to 0 rpm, and control the running time of the engine and the drive motor to 25 s; the running time is 25 s;

[0113] S12. Execute system adjustment mode 6,

[0114] Control the engine, drive motor, and generator to stop working completely, and eliminate the test error caused by entering the pure electric mode from the reverse mode. Specifically, it includes:

[0115] S1201. The control platform issues a control command, and the hybrid power system enters system adjustment mode 6;

[0116] S1202. Control the engine to stop; control the torque of the drive motor to be 0 N·m and the speed to be 0 rpm; control the torque of the generator to be 0 N·m and the speed to be 0 rpm; the running time is 235 s.

[0117] S13. Determine whether the number of cycles has reached the preset threshold of 900. If the judgment result is no, repeat steps S1 - S12 until the judgment result is yes, and end the detection process;

[0118] In this application, by selecting the working condition points for the vehicle project with a dual - motor hybrid power system, the durability test of the dual - motor hybrid power system is realized. In the durability test method, the dual - motor hybrid power system is tested according to the total cycle time of 750 h (3000 s for a single cycle and 900 total cycles), and the operating conditions in multiple application modes such as pure electric mode, parking power generation, parallel drive, series drive, and energy recovery are evaluated. The selected working conditions are closer to the actual user's usage conditions, and more truly reflect the reliability of the dual - motor hybrid power system;

[0119] To improve the reliability of the test, this application executes the corresponding system adjustment mode between adjacent application modes to eliminate test errors; finally, the durability performance test result of the hybrid power system is obtained by repeatedly executing the above steps until the number of cycles reaches the preset threshold;

[0120] Compared with the traditional test method of obtaining the comprehensive durability performance of the system by separately testing the durability performance of the internal parts of the system, this application conducts durability assessment on the integrated hybrid power system on the test bench, shortens the test cycle of the whole vehicle, improves the development efficiency of the whole vehicle, and reduces the development cost.

[0121] Embodiment 2

[0122] Based on the same inventive concept, Embodiment 2 of this application provides an electronic device, as shown in the attached Figure 4 figure, which includes a memory 304, a processor 302, and a computer program stored on the memory 304 and executable on the processor 302. When the processor 302 executes the program, it implements the steps of the above - mentioned durability test method for a dual - motor hybrid power system.

[0123] Among them, in Figure 4 , a bus architecture (represented by bus 300), the bus 300 may include any number of interconnected buses and bridges. The bus 300 links together various circuits including one or more processors represented by the processor 302 and a memory represented by the memory 304. The bus 300 may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art. Therefore, they will not be further described herein. The bus interface 306 provides an interface between the bus 300 and the receiver 301 and the transmitter 303. The receiver 301 and the transmitter 303 may be the same element, i.e., a transceiver, which provides a unit for communicating with various other devices on the transmission medium. The processor 302 is responsible for managing the bus 300 and general processing, while the memory 304 may be used to store data used by the processor 302 when performing operations.

[0124] Embodiment 3

[0125] Based on the same inventive concept, Embodiment 3 of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the above-mentioned durability test method for a dual-motor hybrid power system are implemented.

[0126] The algorithms and displays provided herein are not inherently related to any particular computer, virtual system, or other device. Various general-purpose systems may also be used in conjunction with the teachings based herein. The structure required to construct such a system is obvious from the above description. In addition, the present invention is not directed to any particular programming language. It should be understood that the content of the present invention described herein can be implemented using various programming languages, and the description of the specific language above is for disclosing the best mode of the present invention.

[0127] In the specification provided herein, a large number of specific details are set forth. However, it can be understood that the embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0128] Similarly, it should be understood that, for the purpose of streamlining the present disclosure and facilitating the understanding of one or more of the various inventive aspects, in the foregoing description of the exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, the disclosed method should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, the inventive aspects lie in less than all the features of the single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate embodiment of the present invention.

[0129] Those skilled in the art will appreciate that the modules in the devices in the embodiments can be adaptively changed and disposed in one or more devices different from the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and in addition, they can be divided into multiple sub-modules or sub-units or sub-components. Except that at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all the features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all the processes or units of any method or device so disclosed. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) can be replaced by an alternative feature that provides the same, equivalent, or similar purpose.

[0130] In addition, those skilled in the art will be able to understand that although some of the embodiments herein include certain features included in other embodiments but not others, the combination of the features of different embodiments means that it is within the scope of the present invention and forms different embodiments. For example, in the following claims, any one of the claimed embodiments can be used in any combination.

[0131] Each component embodiment of the present invention can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art should understand that a microprocessor or a digital instruction processor (DSP) can be used in practice to implement some or all of the functions of some or all of the components of the thermal simulation device of the aluminum substrate and the electronic device according to the embodiments of the present invention. The present invention can also be implemented as a device or apparatus program (e.g., a computer program and a computer program product) for executing part or all of the methods described herein. Such a program implementing the present invention can be stored on a computer-readable medium, or can be in the form of one or more instructions. Such instructions can be downloaded from an Internet website, or provided on carrier instructions, or provided in any other form.

[0132] The above are only embodiments of the present application. Specific structures and characteristics and other common knowledge in the art are not described in detail herein. Those of ordinary skill in the art know all the common technical knowledge in the technical field to which the invention belongs before the filing date or the priority date, can know all the prior arts in this field, and have the ability to use conventional experimental means before this date. Those of ordinary skill in the art can, under the inspiration given in the present application, combine their own abilities to complete and implement this solution. Some typical well-known structures or well-known methods should not be an obstacle for those of ordinary skill in the art to implement the present application. It should be noted that for those skilled in the art, without departing from the structure of the present application, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present application, and these will not affect the implementation effect of the present application and the practicability of the patent. The protection scope required by the present application should be subject to the content of its claims, and the specific implementation manners and other records in the specification can be used to interpret the content of the claims.

Claims

1. A durability test method for a dual-motor hybrid power system, characterized in that, including Step S1: Control the operating parameters of the hybrid power system to obtain multiple application modes of the hybrid power system and the operating conditions corresponding to the application modes. The application modes include pure electric mode, parking power generation mode, parallel mode, engine drive mode, energy recovery mode, and reverse mode. The pure electric mode includes controlling the engine to stop and driving the motor to rotate forward with positive torque. The parking power generation mode includes controlling the driving motor to stop and driving the generator to generate electricity by the engine. The parallel mode includes controlling the engine and the driving motor to rotate forward with positive torque and the generator to rotate forward with zero torque. The engine drive mode includes controlling the engine to rotate forward with positive torque and the generator and the driving motor to rotate with zero torque. The energy recovery mode includes controlling the engine and the generator to rotate with zero torque and the driving motor to rotate backward with negative torque. The reverse mode includes controlling the engine and the generator to stop and the driving motor to rotate backward with positive torque; Step S2: Execute the corresponding system adjustment mode between two adjacent application modes to eliminate test errors. When the two adjacent application modes are from the pure electric mode to the parking power generation mode, the system adjustment mode includes controlling the driving motor to stop. When the two adjacent application modes are from the parking power generation mode to the parallel mode or from the parallel mode to the engine drive mode, the system adjustment mode includes controlling the engine, the generator, and the driving motor to switch the speed and torque to the speed and torque of the next application mode. When the two adjacent application modes are from the engine drive mode to the energy recovery mode, the system adjustment mode includes switching the speed and torque of the engine and the generator to the speed and torque of the next application mode and switching the speed of the driving motor to the speed of the next application mode. When the two adjacent application modes are from the energy recovery mode to the reverse mode or from the reverse mode to the pure electric mode, the system adjustment mode includes controlling the engine, the generator, and the driving motor to stop; Step S3: Loop and execute the above Steps S1 to S2 until the number of loops reaches a preset threshold.

2. The durability test method for a dual-motor hybrid power system according to claim 1, wherein the operating parameters of the hybrid power system include the torque, speed, and operating time of the components within the hybrid power system; the components within the hybrid power system include an engine, a driving motor, and a generator.

3. The endurance test method for a dual-motor hybrid power system according to claim 2, characterized in that The pure electric mode includes controlling the engine to stop and obtaining the operating conditions of the driving motor under alternating high torque and low torque, including controlling the torque of the driving motor to be 180 N·m, controlling the speed of the driving motor to be 3000 rpm, and controlling the operating time of the driving motor to be 50 s to obtain the operating conditions of the driving motor under high torque; controlling the torque of the driving motor to be 75 N·m, the speed to be 3000 rpm, and the operating time to be 450 s to obtain the operating conditions of the driving motor under low torque.

4. A durability test method for a dual-motor hybrid power system according to claim 2, characterized in that, The parking power generation mode includes obtaining the operating conditions of the generator and the engine under high torque and rated torque, including Control the torque of the generator to 79 N.m, control the speed of the generator to 6000 rpm, and control the operating time of the generator to 50 s; control the torque of the engine to 196 N.m, control the speed of the engine to 2420 rpm, and control the operating time of the engine to 50 s to obtain the operating conditions of the generator and the engine at high torque. Control the torque of the generator to 35 N.m, control the speed of the generator to 6000 rpm, and control the operating time of the generator to 500 s; control the torque of the engine to 86 N.m, control the speed of the engine to 2420 rpm, and control the operating time of the engine to 500 s to obtain the operating conditions of the generator and the engine under rated torque operation.

5. A durability test method for a dual-motor hybrid power system according to claim 2, characterized in that The parallel mode includes Control the torque of the engine to 196 N.m, control the speed of the engine to 3000 rpm, and control the operating time of the engine to 190 s; Control the torque of the drive motor to 28 N.m, control the speed of the drive motor to 8464 rpm, and control the operating time of the drive motor to 190 s; Control the torque of the generator to 0 N.m, control the speed of the generator to 7428 rpm, and control the operating time of the generator to 190 s.

6. The durability test method for a dual-motor hybrid power system according to claim 2, characterized in that The engine drive mode includes Control the torque of the engine to 196 N.m, control the speed of the engine to 3000 rpm, and control the operating time of the engine to 740 s; Control the torque of the drive motor to 0 N.m, control the speed of the drive motor to 8464 rpm, and control the operating time of the drive motor to 740 s; Control the torque of the generator to 0 N.m, control the speed of the generator to 7428 rpm, and control the operating time of the generator to 740 s.

7. The durability test method for a dual-motor hybrid power system according to claim 2, characterized in that The energy recovery mode includes Control the torque of the engine to 0 N.m, control the speed of the engine to 800 rpm, and control the operating time of the engine to 260 s; Control the torque of the drive motor to -75 N.m, control the speed of the drive motor to 3000 rpm, and control the operating time of the drive motor to 260 s; Control the torque of the generator to 0 N.m, control the speed of the generator to 1980 rpm, and control the operating time of the generator to 260 s.

8. A durability test method for a dual-motor hybrid power system according to claim 2, characterized in that The reverse mode includes Control the engine to stop, control the torque of the drive motor to 135 N.m, control the speed of the drive motor to -2800 rpm, and control the operating time of the engine and the drive motor to 25 s; Control the torque of the generator to 0 N.m, the speed of the generator to 0 rpm, and the operating time of the generator to 25 s.

9. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the method steps described in any one of claims 1-8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method steps described in any one of claims 1-8.

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