Parameter testing method and device of hybrid power system

Abstract

The embodiment of the invention provides a parameter test method and device for a hybrid power system, and the method comprises the steps: obtaining test parameters of a to-be-tested vehicle when the to-be-tested vehicle is in different working modes, determining an efficiency parameter corresponding to the to-be-tested vehicle according to the test parameters, and determining the efficiency parameter of the to-be-tested vehicle according to the efficiency parameter. The efficiency parameters at least comprise the comprehensive efficiency of the hybrid power system, the efficiency of a real vehicle motor body, the efficiency of a real vehicle generator body and the transmission efficiency of the hybrid power transmission, and the efficiency test method and device can carry out efficiency test on the dual-motor hybrid power system, test key efficiency parameters such as the comprehensive efficiency of the hybrid power system, the efficiency of the real vehicle motor body and the transmission efficiency of the hybrid power transmission. The test can be completed through one-time test, the test speed is high, and data results are accurate; the rack equipment is simple in arrangement form, convenient to switch, convenient to operate and use and high in equipment universality, and other types of products such as transmissions, speed reducers and drive axles can be tested.

Description

Technical Field

[0001] The present application relates to the field of testing technology, and in particular to a method and device for testing parameters of a hybrid system. Background Art

[0002] Today, electrification is the development trend of passenger cars, and major OEMs have invested a lot of resources in the development of new energy models. Hybrid vehicles are transitional products from traditional fuel vehicles to pure electric vehicles. Due to the fact that power battery technology has yet to be broken through, hybrid vehicles will inevitably coexist with traditional fuel vehicles and pure electric vehicles for a long time. Fuel saving rate is an important performance parameter of hybrid vehicles, and the efficiency of the hybrid system as the powertrain of the vehicle is an important factor affecting the fuel saving rate and an important indicator for product development. However, the existing technology can only detect the efficiency under a single working mode, and cannot make a comprehensive judgment on the efficiency of multiple different working modes. Therefore, how to improve the accuracy of the efficiency evaluation of the vehicle hybrid system is an urgent problem to be solved. Summary of the invention

[0003] Some embodiments of the present application aim to provide a parameter testing method and device for a hybrid system. Through the technical solutions of the embodiments of the present application, the test parameters of the vehicle to be tested are obtained when the vehicle to be tested is in different working modes, wherein the test parameters include at least: battery simulator voltage and current, actual vehicle drive motor voltage and current, actual vehicle generator voltage and current, actual vehicle drive motor torque speed, actual vehicle generator torque speed, drive dynamometer torque speed, first load dynamometer torque speed and second load dynamometer torque speed; according to the test parameters, efficiency parameters corresponding to the vehicle to be tested are determined, and the efficiency parameters include at least the comprehensive efficiency of the hybrid system, the actual vehicle motor body efficiency, the actual vehicle generator body efficiency and the hybrid transmission efficiency. The embodiments of the present application can carry out efficiency tests on dual-motor hybrid systems, test key efficiency parameters such as the comprehensive efficiency of the hybrid system, the actual vehicle motor body efficiency, and the hybrid transmission efficiency, and can be completed in one test, with fast test speed and accurate data results; the bench equipment has a simple layout, is easy to switch, and is easy to operate and use. It can also carry out tests on other types of products such as transmissions, reducers, and drive axles, and the equipment has strong versatility.

[0004] In a first aspect, some embodiments of the present application provide a parameter testing method for a hybrid system, which is applied to a test terminal, wherein the test terminal is connected to a vehicle to be tested, and the vehicle to be tested includes at least a dual-motor hybrid system, and the method includes:

[0005] When the vehicle to be tested is in different working modes, the test parameters of the vehicle to be tested are obtained, wherein the test parameters include at least: battery simulator voltage and current, actual vehicle drive motor voltage and current, actual vehicle generator voltage and current, actual vehicle drive motor torque speed, actual vehicle generator torque speed, drive dynamometer torque speed, first load dynamometer torque speed and second load dynamometer torque speed;

[0006] According to the test parameters, efficiency parameters corresponding to the vehicle to be tested are determined, and the efficiency parameters at least include the comprehensive efficiency of the hybrid system, the efficiency of the actual vehicle motor body, the efficiency of the actual vehicle generator body and the transmission efficiency of the hybrid transmission.

[0007] Some embodiments of the present application can carry out efficiency tests on dual-motor hybrid systems, test key efficiency parameters such as the comprehensive efficiency of the hybrid system, the efficiency of the actual vehicle motor, and the transmission efficiency of the hybrid transmission, and can be completed in one test, with fast test speed and accurate data results; the bench equipment has a simple layout, is easy to switch, and is easy to operate and use. It can also carry out tests on other types of products such as transmissions, reducers, drive axles, etc., and the equipment has strong versatility.

[0008] Optionally, the working modes include at least electric drive mode, parallel mode, direct drive mode, kinetic energy recovery mode and parking power generation mode.

[0009] Some embodiments of the present application can adapt to various operating modes of the hybrid system in the WLTC condition.

[0010] Optionally, determining the hybrid system comprehensive efficiency corresponding to the vehicle to be tested according to the test parameters includes:

[0011] Obtaining a first output work, wherein the first output work includes at least a load dynamometer mechanical work in electric drive mode, a load dynamometer mechanical work in parallel mode, a load dynamometer mechanical work in direct drive mode, a battery simulator electric work in kinetic energy recovery mode, and a battery simulator electric work in parking power generation mode;

[0012] Obtaining a first input work, wherein the first input work includes at least a battery simulator electric work in electric drive mode, a battery simulator electric work in parallel mode, a drive dynamometer mechanical work in parallel mode, a drive dynamometer mechanical work in direct drive mode, a load dynamometer mechanical work in kinetic energy recovery mode, and a drive dynamometer mechanical work in parking power generation mode;

[0013] The comprehensive efficiency of the hybrid system is determined according to the first input work and the first output work.

[0014] Some embodiments of the present application obtain output work, that is, the sum of the mechanical work of the load dynamometer in different working modes and the electrical work of the battery simulator in different working modes, and simultaneously obtain input work, that is, the sum of the mechanical work of the load dynamometer in different working modes and the electrical work of the battery simulator in different working modes, and then determine the comprehensive efficiency of the hybrid system based on the first input work and the first output work.

[0015] Optionally, the mechanical work of the driving dynamometer is calculated based on the driving dynamometer torque and the driving dynamometer speed;

[0016] The load dynamometer mechanical work at least includes a first load dynamometer mechanical work and a second load dynamometer mechanical work, wherein the first load dynamometer mechanical work is calculated based on the first load dynamometer torque and the first load dynamometer speed; the second load dynamometer mechanical work is calculated based on the second load dynamometer torque and the second load dynamometer speed;

[0017] The battery simulator electrical work is calculated based on the battery simulator voltage and the battery simulator current.

[0018] Some embodiments of the present application calculate mechanical work based on the acquired torque and rotational speed, and calculate the electrical work of the battery simulator by acquiring the battery simulator voltage and the battery simulator current, so that data can be collected conveniently.

[0019] Optionally, determining the actual vehicle motor body efficiency corresponding to the vehicle to be tested according to the test parameters includes:

[0020] Obtaining a second output work, wherein the second output work at least includes the mechanical work of the actual vehicle drive motor in the electric drive mode, the mechanical work of the actual vehicle drive motor in the parallel mode, and the electric work of the actual vehicle drive motor in the kinetic energy recovery mode;

[0021] Acquire a second input work, wherein the second input work at least includes the electric work of the actual vehicle drive motor in the electric drive mode, the electric work of the actual vehicle drive motor in the parallel mode, and the mechanical work of the actual vehicle drive motor in the kinetic energy recovery mode;

[0022] The actual vehicle motor body efficiency is determined according to the second input work and the second output work.

[0023] Some embodiments of the present application calculate the actual vehicle motor body efficiency by obtaining the mechanical work of the actual vehicle drive motor in electric drive mode, the mechanical work of the actual vehicle drive motor in parallel mode, the electric work of the actual vehicle drive motor in kinetic energy recovery mode, and the electric work of the actual vehicle drive motor in electric drive mode, the electric work of the actual vehicle drive motor in parallel mode, and the mechanical work of the actual vehicle drive motor in kinetic energy recovery mode.

[0024] Optionally, the mechanical work of the actual vehicle drive motor is calculated based on the actual vehicle drive motor torque and the actual vehicle drive motor speed;

[0025] The electric work of the actual vehicle driving motor is calculated based on the actual vehicle driving motor voltage and the actual vehicle driving motor current.

[0026] Some embodiments of the present application calculate the mechanical work of the actual vehicle drive motor based on the actual vehicle drive motor torque and the actual vehicle drive motor speed, and calculate the electrical work of the actual vehicle drive motor based on the actual vehicle drive motor voltage and the actual vehicle drive motor current, so that data can be collected conveniently.

[0027] Optionally, determining the actual vehicle generator body efficiency corresponding to the vehicle to be tested according to the test parameters includes:

[0028] Acquire a third output work, wherein the third output work at least includes the actual vehicle generator electric work in the parking power generation mode;

[0029] Acquire a third input work, wherein the third input work at least includes the mechanical work of the actual vehicle generator in the parking power generation mode;

[0030] The actual vehicle generator body efficiency corresponding to the vehicle to be tested is determined according to the third output work and the third input work.

[0031] Some embodiments of the present application calculate the actual vehicle generator body efficiency by obtaining the actual vehicle generator electric work in the parking power generation mode and the actual vehicle generator mechanical work in the parking power generation mode.

[0032] Optionally, the actual vehicle generator mechanical work is calculated based on the actual vehicle generator torque and actual vehicle generator speed;

[0033] The actual vehicle generator electric work is calculated based on the actual vehicle generator voltage and the actual vehicle generator current.

[0034] Some embodiments of the present application calculate the mechanical work of the actual vehicle generator based on the actual vehicle generator torque and the actual vehicle generator speed, and calculate the electrical work of the actual vehicle generator based on the actual vehicle generator voltage and the actual vehicle generator current, thereby facilitating data collection.

[0035] Optionally, determining the transmission efficiency of a hybrid transmission corresponding to the vehicle to be tested according to the test parameters includes:

[0036] Obtaining a fourth output work, wherein the fourth output work at least includes a load dynamometer mechanical work in electric drive mode, a load dynamometer mechanical work in parallel mode, a load dynamometer mechanical work in direct drive mode, a real vehicle drive motor mechanical work in kinetic energy recovery mode, and a real vehicle generator mechanical work in parking power generation mode;

[0037] Obtaining a fourth input work, wherein the fourth input work at least includes the mechanical work of the actual vehicle drive motor in the electric drive mode, the mechanical work of the actual vehicle drive motor in the parallel mode, the mechanical work of the drive dynamometer in the parallel mode, the mechanical work of the drive dynamometer in the direct drive mode, the mechanical work of the load dynamometer in the kinetic energy recovery mode, and the mechanical work of the drive dynamometer in the parking power generation mode;

[0038] A transmission efficiency of a hybrid transmission corresponding to the vehicle to be tested is determined according to the fourth output work and the fourth input work.

[0039] Some embodiments of the present application obtain the fourth output work, i.e., the sum of the mechanical work of the load dynamometer in electric drive mode, the mechanical work of the load dynamometer in parallel mode, the mechanical work of the load dynamometer in direct drive mode, the mechanical work of the actual vehicle drive motor in kinetic energy recovery mode, and the mechanical work of the actual vehicle generator in parking power generation mode, and the input work, i.e., the mechanical work of the actual vehicle drive motor in electric drive mode, the mechanical work of the actual vehicle drive motor in parallel mode, the mechanical work of the drive dynamometer in parallel mode, the mechanical work of the drive dynamometer in direct drive mode, the mechanical work of the load dynamometer in kinetic energy recovery mode, and the mechanical work of the drive dynamometer in parking power generation mode, and then determine the transmission efficiency of the hybrid transmission corresponding to the vehicle to be tested according to the fourth output work and the fourth input work.

[0040] Optionally, determining the transmission efficiency of the hybrid transmission corresponding to the vehicle to be tested according to the fourth output work and the fourth input work includes:

[0041] calculating a ratio of the fourth output work to the fourth input work;

[0042] The ratio is determined as the transmission efficiency of the hybrid transmission corresponding to the vehicle to be tested.

[0043] Some embodiments of the present application calculate the ratio of the fourth output work to the fourth input work to obtain the transmission efficiency of the hybrid transmission corresponding to the vehicle to be tested.

[0044] Optionally, the fourth output work is the sum of the mechanical work of the load dynamometer in electric drive mode, the mechanical work of the load dynamometer in parallel mode, the mechanical work of the load dynamometer in direct drive mode, the mechanical work of the actual vehicle drive motor in kinetic energy recovery mode, and the mechanical work of the actual vehicle generator in parking power generation mode.

[0045] Some embodiments of the present application calculate the sum of the mechanical work under different working modes to obtain the output work. In this way, various parameters can be obtained in advance through a test, and the test speed is fast and the data results are accurate.

[0046] In a second aspect, some embodiments of the present application provide a parameter testing device for a hybrid system, which is applied to a test terminal, wherein the test terminal is connected to a vehicle to be tested, wherein the vehicle to be tested includes at least a dual-motor hybrid system, and the device includes:

[0047] An acquisition module is used to acquire test parameters of the vehicle to be tested when the vehicle to be tested is in different working modes, wherein the test parameters include at least: battery simulator voltage and current, actual vehicle drive motor voltage and current, actual vehicle generator voltage and current, actual vehicle drive motor torque speed, actual vehicle generator torque speed, drive dynamometer torque speed, first load dynamometer torque speed, and second load dynamometer torque speed;

[0048] The test module is used to determine the efficiency parameters corresponding to the vehicle to be tested according to the test parameters, and the efficiency parameters at least include the comprehensive efficiency of the hybrid system, the efficiency of the actual vehicle motor body, the efficiency of the actual vehicle generator body and the transmission efficiency of the hybrid transmission.

[0049] Some embodiments of the present application can carry out efficiency tests on dual-motor hybrid systems, test key efficiency parameters such as the comprehensive efficiency of the hybrid system, the efficiency of the actual vehicle motor, and the transmission efficiency of the hybrid transmission, and can be completed in one test, with fast test speed and accurate data results; the bench equipment has a simple layout, is easy to switch, and is easy to operate and use. It can also carry out tests on other types of products such as transmissions, reducers, drive axles, etc., and the equipment has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of some embodiments of the present application, the drawings required for use in some embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0051] Figure 1 A flow chart of a parameter testing method for a hybrid system provided in an embodiment of the present application;

[0052] Figure 2 A schematic flow chart of another hybrid system parameter testing method provided in an embodiment of the present application;

[0053] Figure 3 A schematic diagram of the structure of a parameter testing device for a hybrid system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0054] The technical solutions in some embodiments of the present application will be described below in conjunction with the drawings in some embodiments of the present application.

[0055] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0056] Today, electrification is the development trend of passenger cars, and major OEMs have invested a lot of resources in the development of new energy vehicle models. Hybrid vehicles are transitional products from traditional fuel vehicles to pure electric vehicles. Due to the fact that power battery technology needs to be broken through, hybrid vehicles will inevitably coexist with traditional fuel vehicles and pure electric vehicles for a long time. Fuel economy is an important performance parameter of hybrid vehicles, and the efficiency of the hybrid system as the powertrain part of the vehicle is an important factor affecting the fuel economy and an important indicator for product development. However, the existing technology can only detect the efficiency in a single working mode, and cannot make a comprehensive judgment on the efficiency of multiple different working modes. Therefore, how to improve the accuracy of the efficiency evaluation of the vehicle hybrid system is an urgent problem to be solved. In view of this, some embodiments of the present application provide a parameter testing method for a hybrid system, the method includes obtaining test parameters of a vehicle to be tested when the vehicle to be tested is in different working modes, wherein the test parameters include at least: battery simulator voltage and current, actual vehicle drive motor voltage and current, actual vehicle generator voltage and current, actual vehicle drive motor torque speed, actual vehicle generator torque speed, drive dynamometer torque speed, first load dynamometer torque speed and second load dynamometer torque speed; according to the test parameters, determine the efficiency parameters corresponding to the vehicle to be tested, the efficiency parameters at least include the comprehensive efficiency of the hybrid system, the efficiency of the actual vehicle motor body, the efficiency of the actual vehicle generator body and the transmission efficiency of the hybrid transmission. The embodiment of the present application can carry out efficiency tests on the dual-motor hybrid system to test key efficiency parameters such as the comprehensive efficiency of the hybrid system, the efficiency of the actual vehicle motor body, and the transmission efficiency of the hybrid transmission, and it can be completed in one test, with fast test speed and accurate data results; the bench equipment has a simple layout, is easy to switch, and is easy to operate and use. It can also be used to test other types of products such as transmissions, reducers, and drive axles, and the equipment has strong versatility.

[0057] like Figure 1 As shown, an embodiment of the present application provides a parameter testing method for a hybrid system, which is applied to a test terminal, the test terminal is connected to a vehicle to be tested, and the vehicle to be tested includes at least a dual-motor hybrid system. The method includes:

[0058] S101, when the vehicle to be tested is in different working modes, obtaining test parameters of the vehicle to be tested, wherein the test parameters include at least: battery simulator voltage and current, actual vehicle drive motor voltage and current, actual vehicle generator voltage and current, actual vehicle drive motor torque speed, actual vehicle generator torque speed, drive dynamometer torque speed, first load dynamometer torque speed, and second load dynamometer torque speed;

[0059] S102. Determine efficiency parameters corresponding to the vehicle to be tested according to the test parameters, where the efficiency parameters at least include the overall efficiency of the hybrid system, the efficiency of the actual vehicle motor, the efficiency of the actual vehicle generator, and the transmission efficiency of the hybrid transmission.

[0060] Specifically, Figure 2 As shown, an embodiment of the present application provides a test bench suitable for a variety of transverse dual-motor hybrid systems, including at least a drive dynamometer, a load dynamometer 1, a load dynamometer 2, a battery simulator, a torque and speed sensor, a voltage and current sensor, a data acquisition system, and a bench control system, i.e., a test terminal.

[0061] The driving dynamometer 1 simulates the actual vehicle engine and serves as the power source of the engine end of the tested hybrid system sample. The speed adjustment range is large and the torque adjustment range is small.

[0062] Load dynamometers 1 and 2 simulate the wheel end load of the actual vehicle, provide resistance at the output end of the hybrid system sample under test, and have a smaller speed adjustment range and a larger torque adjustment range;

[0063] The battery simulator simulates the real vehicle power battery and supplies power to the inverter of the hybrid system sample under test;

[0064] The torque speed sensor is used to measure the mechanical power of the actual vehicle motor and the bench dynamometer;

[0065] Voltage and current sensors are used to measure the electric power of the battery simulator and the actual vehicle motor.

[0066] The bench equipment is simple in composition. The three dynamometers can be moved and adjusted in height, which is very convenient for the installation of test samples, half shafts, high and low voltage wiring harnesses and other test pieces. Figure 2 As shown, the details are as follows:

[0067] The driving dynamometer is connected to the engine input terminal of the test system of the vehicle to be tested, the load dynamometers 1 and 2 are connected to the output terminal of the test system, and the battery simulator is connected to the high-voltage DC input terminal of the inverter of the test system.

[0068] Import the actual vehicle road spectrum of the WLTC operating condition into the test bench control system, set the test bench control parameters, and make the tested hybrid system operate according to the WLTC operating condition.

[0069] The battery simulator voltage and current, actual vehicle drive motor voltage and current, actual vehicle generator voltage and current, actual vehicle drive motor torque speed, actual vehicle generator torque speed, drive dynamometer torque speed, load dynamometer 1 torque speed, and drive dynamometer 2 torque speed are collected throughout the entire process. After data calculation and processing, the comprehensive efficiency of the hybrid system, the actual vehicle motor body efficiency, and the hybrid transmission transmission efficiency can be obtained.

[0070] The specific testing process is:

[0071] The first step is to install the hybrid system sample on the test bench, pay attention to adjusting the length and angle of mechanical parts such as flanges and half shafts to appropriate values, and arrange the high-voltage and low-voltage harnesses reasonably;

[0072] The second step is to start the test bench equipment for debugging. During the process, pay attention to adverse factors such as vibration and abnormal noise. If there is any abnormality, stop the test bench equipment immediately, find out the cause and solve it to ensure the safety of the test;

[0073] The third step is to conduct formal tests, and pay real-time attention to the status of the tested samples and bench equipment during the process;

[0074] The fourth step is to process and calculate the original data to obtain the test results, and the test ends.

[0075] The embodiment of the present application proposes a method and device for testing the comprehensive efficiency of a dual-motor hybrid system based on the WLTC working condition. It can carry out efficiency tests on the dual-motor hybrid system, test key efficiency parameters such as the comprehensive efficiency of the hybrid system, the efficiency of the actual vehicle motor body, and the transmission efficiency of the hybrid transmission, and it can be completed in one test, with fast test speed and accurate data results; the bench equipment layout is simple, easy to switch, easy to operate and use, and can also test other types of products such as transmissions, reducers, and drive axles, and the equipment has strong versatility. The embodiment of the present application can test the WLTC comprehensive efficiency of the hybrid system, the actual vehicle motor efficiency, and the transmission efficiency of the transmission in one test, saving test time; the test process operation and data calculation and processing methods are simple and highly feasible; the bench equipment layout can be flexibly switched, and transmission products such as reducers and transmissions can also be tested, covering a variety of product verification capabilities.

[0076] Some embodiments of the present application can carry out efficiency tests on dual-motor hybrid systems, test key efficiency parameters such as the comprehensive efficiency of the hybrid system, the efficiency of the actual vehicle motor, and the transmission efficiency of the hybrid transmission, and can be completed in one test, with fast test speed and accurate data results; the bench equipment has a simple layout, is easy to switch, and is easy to operate and use. It can also carry out tests on other types of products such as transmissions, reducers, drive axles, etc., and the equipment has strong versatility.

[0077] Another embodiment of the present application further supplements the parameter testing method of the hybrid system provided in the above embodiment.

[0078] Optionally, the working modes include at least electric drive mode, parallel mode, direct drive mode, kinetic energy recovery mode and parking power generation mode.

[0079] Specifically, in the WLTC condition, the hybrid system has several working modes:

[0080] Electric drive mode: The vehicle is driven by the vehicle's drive motor, but the vehicle's generator and engine do not work;

[0081] Parallel mode: The real vehicle drive motor and engine jointly drive the vehicle forward, and the real vehicle generator does not work;

[0082] Direct drive mode: The engine drives the vehicle forward, and the actual vehicle drive motor and engine do not work;

[0083] Kinetic energy recovery mode: The wheel end drives the vehicle's drive motor to generate electricity and charge the vehicle's power battery;

[0084] Parking power generation mode: When the vehicle is parked, the engine drives the vehicle generator to generate electricity and charge the vehicle's power battery.

[0085] Some embodiments of the present application can adapt to various operating modes of the hybrid system in the WLTC condition.

[0086] Optionally, determining the overall efficiency of the hybrid system corresponding to the vehicle to be tested according to the test parameters includes:

[0087] Obtaining a first output work, wherein the first output work includes at least a load dynamometer mechanical work in electric drive mode, a load dynamometer mechanical work in parallel mode, a load dynamometer mechanical work in direct drive mode, a battery simulator electric work in kinetic energy recovery mode, and a battery simulator electric work in parking power generation mode;

[0088] Obtaining a first input work, wherein the first input work includes at least a battery simulator electric work in electric drive mode, a battery simulator electric work in parallel mode, a drive dynamometer mechanical work in parallel mode, a drive dynamometer mechanical work in direct drive mode, a load dynamometer mechanical work in kinetic energy recovery mode, and a drive dynamometer mechanical work in parking power generation mode;

[0089] The comprehensive efficiency of the hybrid system is determined according to the first input work and the first output work.

[0090] Specifically, the total output work, i.e., the first output work = load dynamometer mechanical work (electric drive mode) + load dynamometer mechanical work (parallel mode) + load dynamometer mechanical work (direct drive mode) + battery simulator electric work (kinetic energy recovery mode) + battery simulator electric work (parking power generation mode);

[0091] Total input work, i.e., first input work = battery simulator electric work (electric drive mode) + battery simulator electric work (parallel mode) + drive dynamometer mechanical work (parallel mode) + drive dynamometer mechanical work (direct drive mode) + load dynamometer mechanical work (kinetic energy recovery mode) + drive dynamometer mechanical work (parking power generation mode);

[0092] Hybrid system overall efficiency

[0093] Some embodiments of the present application obtain output work, that is, the sum of the mechanical work of the load dynamometer in different working modes and the electrical work of the battery simulator in different working modes, and simultaneously obtain input work, that is, the sum of the mechanical work of the load dynamometer in different working modes and the electrical work of the battery simulator in different working modes, and then determine the comprehensive efficiency of the hybrid system based on the first input work and the first output work.

[0094] Optionally, the mechanical work of the driving dynamometer is calculated based on the driving dynamometer torque and the driving dynamometer speed;

[0095] The load dynamometer mechanical work includes at least a first load dynamometer mechanical work and a second load dynamometer mechanical work, wherein the first load dynamometer mechanical work is calculated based on the first load dynamometer torque and the first load dynamometer speed; and the second load dynamometer mechanical work is calculated based on the second load dynamometer torque and the second load dynamometer speed.

[0096] The battery simulator electric work is calculated based on the battery simulator voltage and battery simulator current. T3-drive dynamometer torque, n3-drive dynamometer speed, drive dynamometer mechanical work

[0097]

[0098] T4-load dynamometer 1 torque, n4-load dynamometer 1 speed, load dynamometer 1 mechanical work

[0099]

[0100] T5-load dynamometer 2 torque, n5-load dynamometer 2 speed, load dynamometer 2 mechanical work

[0101]

[0102] Load dynamometer mechanical work = W4 + W5;

[0103] U3-battery simulator voltage, I 3-battery simulator current, battery simulator power

[0104]

[0105] Some embodiments of the present application calculate mechanical work based on the acquired torque and rotational speed, and calculate the electrical work of the battery simulator by acquiring the battery simulator voltage and the battery simulator current, so that data can be collected conveniently.

[0106] Optionally, determining the actual vehicle motor body efficiency corresponding to the vehicle to be tested according to the test parameters includes:

[0107] Obtaining a second output work, wherein the second output work at least includes the mechanical work of the actual vehicle drive motor in the electric drive mode, the mechanical work of the actual vehicle drive motor in the parallel mode, and the electric work of the actual vehicle drive motor in the kinetic energy recovery mode;

[0108] Acquire a second input work, wherein the second input work includes at least the electric work of the actual vehicle drive motor in the electric drive mode, the electric work of the actual vehicle drive motor in the parallel mode, and the mechanical work of the actual vehicle drive motor in the kinetic energy recovery mode;

[0109] The actual vehicle motor efficiency is determined based on the second input work and the second output work.

[0110] Specifically,

[0111] The total output work, i.e., the second output work = the mechanical work of the actual vehicle drive motor (electric drive mode) + the mechanical work of the actual vehicle drive motor (parallel mode) + the electric work of the actual vehicle drive motor (kinetic energy recovery mode);

[0112] Total input work, i.e., the second input work = electric work of the actual vehicle drive motor (electric drive mode) + electric work of the actual vehicle drive motor (parallel mode) + mechanical work of the actual vehicle drive motor (kinetic energy recovery mode);

[0113] Actual vehicle drive motor efficiency

[0114] Some embodiments of the present application calculate the actual vehicle motor body efficiency by obtaining the mechanical work of the actual vehicle drive motor in electric drive mode, the mechanical work of the actual vehicle drive motor in parallel mode, the electric work of the actual vehicle drive motor in kinetic energy recovery mode, and the electric work of the actual vehicle drive motor in electric drive mode, the electric work of the actual vehicle drive motor in parallel mode, and the mechanical work of the actual vehicle drive motor in kinetic energy recovery mode.

[0115] Optionally, the mechanical work of the actual vehicle drive motor is calculated based on the actual vehicle drive motor torque and the actual vehicle drive motor speed;

[0116] The electric work of the actual vehicle drive motor is calculated based on the actual vehicle drive motor voltage and actual vehicle drive motor current.

[0117] T1-actual vehicle drive motor torque, n1-actual vehicle drive motor speed, actual vehicle drive motor mechanical work

[0118]

[0119] U1-actual vehicle drive motor voltage, I1-actual vehicle drive motor current, actual vehicle drive motor electric power

[0120]

[0121] Some embodiments of the present application calculate the mechanical work of the actual vehicle drive motor based on the actual vehicle drive motor torque and the actual vehicle drive motor speed, and calculate the electrical work of the actual vehicle drive motor based on the actual vehicle drive motor voltage and the actual vehicle drive motor current, so that data can be collected conveniently.

[0122] Optionally, determining the actual vehicle generator body efficiency corresponding to the vehicle to be tested according to the test parameters includes:

[0123] Acquire a third output work, wherein the third output work at least includes the actual vehicle generator electric work in the parking power generation mode;

[0124] Acquiring a third input work, wherein the third input work at least includes the mechanical work of the actual vehicle generator in the parking power generation mode;

[0125] The actual vehicle generator body efficiency corresponding to the vehicle to be tested is determined according to the third output work and the third input work.

[0126] Specifically,

[0127] Total output work, i.e., the third output work = actual vehicle generator work (parking power generation mode);

[0128] Total input work, i.e. the third input work = actual vehicle generator mechanical work (parking power generation mode);

[0129] Actual vehicle generator efficiency

[0130] Some embodiments of the present application calculate the actual vehicle generator body efficiency by obtaining the actual vehicle generator electric work in the parking power generation mode and the actual vehicle generator mechanical work in the parking power generation mode.

[0131] Optionally, the mechanical work of the actual vehicle generator is calculated based on the actual vehicle generator torque and the actual vehicle generator speed;

[0132] The electric work of the actual vehicle generator is calculated based on the actual vehicle generator voltage and actual vehicle generator current.

[0133] Specifically, T2-actual vehicle generator torque, n2-actual vehicle generator speed, actual vehicle generator mechanical

[0134]

[0135] U2-actual vehicle generator voltage, I2-actual vehicle generator current, actual vehicle generator electric power

[0136]

[0137] Some embodiments of the present application calculate the mechanical work of the actual vehicle generator based on the actual vehicle generator torque and the actual vehicle generator speed, and calculate the electrical work of the actual vehicle generator based on the actual vehicle generator voltage and the actual vehicle generator current, thereby facilitating data collection.

[0138] Optionally, determining the transmission efficiency of a hybrid transmission corresponding to the vehicle to be tested according to the test parameters includes:

[0139] Obtaining a fourth output work, wherein the fourth output work at least includes a load dynamometer mechanical work in electric drive mode, a load dynamometer mechanical work in parallel mode, a load dynamometer mechanical work in direct drive mode, a real vehicle drive motor mechanical work in kinetic energy recovery mode, and a real vehicle generator mechanical work in parking power generation mode;

[0140] Obtaining a fourth input work, wherein the fourth input work includes at least the mechanical work of the actual vehicle drive motor in the electric drive mode, the mechanical work of the actual vehicle drive motor in the parallel mode, the mechanical work of the drive dynamometer in the parallel mode, the mechanical work of the drive dynamometer in the direct drive mode, the mechanical work of the load dynamometer in the kinetic energy recovery mode, and the mechanical work of the drive dynamometer in the parking power generation mode;

[0141] The transmission efficiency of the hybrid transmission corresponding to the vehicle to be tested is determined according to the fourth output work and the fourth input work.

[0142] Specifically, the total output work, i.e., the fourth output work = load dynamometer mechanical work (electric drive mode) + load dynamometer mechanical work (parallel mode) + load dynamometer mechanical work (direct drive mode) + actual vehicle drive motor mechanical work (kinetic energy recovery mode) + actual vehicle generator mechanical work (parking power generation mode);

[0143] Total input work, i.e., the fourth input work = mechanical work of the actual vehicle drive motor (electric drive mode) + mechanical work of the actual vehicle drive motor (parallel mode) + mechanical work of the drive dynamometer (parallel mode) + mechanical work of the drive dynamometer (direct drive mode) + mechanical work of the load dynamometer (kinetic energy recovery mode) + mechanical work of the drive dynamometer (parking power generation mode);

[0144] Hybrid transmission efficiency

[0145] Some embodiments of the present application obtain the fourth output work, i.e., the sum of the mechanical work of the load dynamometer in electric drive mode, the mechanical work of the load dynamometer in parallel mode, the mechanical work of the load dynamometer in direct drive mode, the mechanical work of the actual vehicle drive motor in kinetic energy recovery mode, and the mechanical work of the actual vehicle generator in parking power generation mode, and the input work, i.e., the mechanical work of the actual vehicle drive motor in electric drive mode, the mechanical work of the actual vehicle drive motor in parallel mode, the mechanical work of the drive dynamometer in parallel mode, the mechanical work of the drive dynamometer in direct drive mode, the mechanical work of the load dynamometer in kinetic energy recovery mode, and the mechanical work of the drive dynamometer in parking power generation mode, and then determine the transmission efficiency of the hybrid transmission corresponding to the vehicle to be tested according to the fourth output work and the fourth input work.

[0146] Optionally, determining the transmission efficiency of a hybrid transmission corresponding to the vehicle to be tested according to the fourth output work and the fourth input work includes:

[0147] calculating a ratio of a fourth output work to a fourth input work;

[0148] The ratio is determined as the transmission efficiency of the hybrid transmission corresponding to the vehicle to be tested.

[0149] Some embodiments of the present application calculate the ratio of the fourth output work to the fourth input work to obtain the transmission efficiency of the hybrid transmission corresponding to the vehicle to be tested.

[0150] Optionally, the fourth output work is the sum of the mechanical work of the load dynamometer in electric drive mode, the mechanical work of the load dynamometer in parallel mode, the mechanical work of the load dynamometer in direct drive mode, the mechanical work of the actual vehicle drive motor in kinetic energy recovery mode, and the mechanical work of the actual vehicle generator in parking power generation mode.

[0151] Some embodiments of the present application calculate the sum of the mechanical work under different working modes to obtain the output work. In this way, various parameters can be obtained in advance through a test, and the test speed is fast and the data results are accurate.

[0152] It should be noted that each implementable method in this embodiment may be implemented separately, or may be implemented in combination in any combination without conflict, and this application is not limited thereto.

[0153] Another embodiment of the present application provides a parameter testing device for a hybrid system, which is used to execute the parameter testing method for the hybrid system provided in the above embodiment.

[0154] like Figure 3 , which is a schematic diagram of the structure of a parameter test device for a hybrid system provided in an embodiment of the present application. The parameter test device for a hybrid system is applied to a test terminal, which is connected to a vehicle to be tested, and the vehicle to be tested includes at least a dual-motor hybrid system, including an acquisition module 301 and a test module 302, wherein:

[0155] The acquisition module 301 is used to acquire the test parameters of the vehicle to be tested when the vehicle to be tested is in different working modes, wherein the test parameters include at least: battery simulator voltage and current, actual vehicle drive motor voltage and current, actual vehicle generator voltage and current, actual vehicle drive motor torque speed, actual vehicle generator torque speed, drive dynamometer torque speed, first load dynamometer torque speed and second load dynamometer torque speed;

[0156] The test module 302 is used to determine the efficiency parameters corresponding to the vehicle to be tested according to the test parameters, and the efficiency parameters at least include the comprehensive efficiency of the hybrid system, the efficiency of the actual vehicle motor body, the efficiency of the actual vehicle generator body and the transmission efficiency of the hybrid transmission.

[0157] Regarding the device in this embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0158] Some embodiments of the present application can carry out efficiency tests on dual-motor hybrid systems, test key efficiency parameters such as the comprehensive efficiency of the hybrid system, the efficiency of the actual vehicle motor, and the transmission efficiency of the hybrid transmission, and can be completed in one test, with fast test speed and accurate data results; the bench equipment has a simple layout, is easy to switch, and is easy to operate and use. It can also carry out tests on other types of products such as transmissions, reducers, drive axles, etc., and the equipment has strong versatility.

[0159] Another embodiment of the present application further supplements the parameter testing device of the hybrid system provided in the above embodiment.

[0160] Optionally, the working modes include at least electric drive mode, parallel mode, direct drive mode, kinetic energy recovery mode and parking power generation mode.

[0161] Some embodiments of the present application can adapt to various operating modes of the hybrid system in the WLTC condition.

[0162] Optionally, the testing module 302 is used to:

[0163] Obtaining a first output work, wherein the first output work includes at least a load dynamometer mechanical work in electric drive mode, a load dynamometer mechanical work in parallel mode, a load dynamometer mechanical work in direct drive mode, a battery simulator electric work in kinetic energy recovery mode, and a battery simulator electric work in parking power generation mode;

[0164] Obtaining a first input work, wherein the first input work includes at least a battery simulator electric work in electric drive mode, a battery simulator electric work in parallel mode, a drive dynamometer mechanical work in parallel mode, a drive dynamometer mechanical work in direct drive mode, a load dynamometer mechanical work in kinetic energy recovery mode, and a drive dynamometer mechanical work in parking power generation mode;

[0165] The comprehensive efficiency of the hybrid system is determined according to the first input work and the first output work.

[0166] Some embodiments of the present application obtain output work, that is, the sum of the mechanical work of the load dynamometer in different working modes and the electrical work of the battery simulator in different working modes, and simultaneously obtain input work, that is, the sum of the mechanical work of the load dynamometer in different working modes and the electrical work of the battery simulator in different working modes, and then determine the comprehensive efficiency of the hybrid system based on the first input work and the first output work.

[0167] Optionally, the mechanical work of the driving dynamometer is calculated based on the driving dynamometer torque and the driving dynamometer speed;

[0168] The load dynamometer mechanical work includes at least a first load dynamometer mechanical work and a second load dynamometer mechanical work, wherein the first load dynamometer mechanical work is calculated based on the first load dynamometer torque and the first load dynamometer speed; and the second load dynamometer mechanical work is calculated based on the second load dynamometer torque and the second load dynamometer speed.

[0169] The battery simulator electrical work is calculated based on the battery simulator voltage and the battery simulator current.

[0170] Some embodiments of the present application calculate mechanical work based on the acquired torque and rotational speed, and calculate the electrical work of the battery simulator by acquiring the battery simulator voltage and the battery simulator current, so that data can be collected conveniently.

[0171] Optionally, the testing module 302 is used to:

[0172] Obtaining a second output work, wherein the second output work at least includes the mechanical work of the actual vehicle drive motor in the electric drive mode, the mechanical work of the actual vehicle drive motor in the parallel mode, and the electric work of the actual vehicle drive motor in the kinetic energy recovery mode;

[0173] Acquire a second input work, wherein the second input work includes at least the electric work of the actual vehicle drive motor in the electric drive mode, the electric work of the actual vehicle drive motor in the parallel mode, and the mechanical work of the actual vehicle drive motor in the kinetic energy recovery mode;

[0174] The actual vehicle motor efficiency is determined based on the second input work and the second output work.

[0175] Some embodiments of the present application calculate the actual vehicle motor body efficiency by obtaining the mechanical work of the actual vehicle drive motor in electric drive mode, the mechanical work of the actual vehicle drive motor in parallel mode, the electric work of the actual vehicle drive motor in kinetic energy recovery mode, and the electric work of the actual vehicle drive motor in electric drive mode, the electric work of the actual vehicle drive motor in parallel mode, and the mechanical work of the actual vehicle drive motor in kinetic energy recovery mode.

[0176] Optionally, the mechanical work of the actual vehicle drive motor is calculated based on the actual vehicle drive motor torque and the actual vehicle drive motor speed;

[0177] The electric work of the actual vehicle drive motor is calculated based on the actual vehicle drive motor voltage and actual vehicle drive motor current.

[0178] Some embodiments of the present application calculate the mechanical work of the actual vehicle drive motor based on the actual vehicle drive motor torque and the actual vehicle drive motor speed, and calculate the electrical work of the actual vehicle drive motor based on the actual vehicle drive motor voltage and the actual vehicle drive motor current, so that data can be collected conveniently.

[0179] Optionally, the testing module 302 is used to:

[0180] Acquire a third output work, wherein the third output work at least includes the actual vehicle generator electric work in the parking power generation mode;

[0181] Acquiring a third input work, wherein the third input work at least includes the mechanical work of the actual vehicle generator in the parking power generation mode;

[0182] The actual vehicle generator body efficiency corresponding to the vehicle to be tested is determined according to the third output work and the third input work.

[0183] Some embodiments of the present application calculate the actual vehicle generator body efficiency by obtaining the actual vehicle generator electric work in the parking power generation mode and the actual vehicle generator mechanical work in the parking power generation mode.

[0184] Optionally, the mechanical work of the actual vehicle generator is calculated based on the actual vehicle generator torque and the actual vehicle generator speed;

[0185] The electric work of the actual vehicle generator is calculated based on the actual vehicle generator voltage and actual vehicle generator current.

[0186] Some embodiments of the present application calculate the mechanical work of the actual vehicle generator based on the actual vehicle generator torque and the actual vehicle generator speed, and calculate the electrical work of the actual vehicle generator based on the actual vehicle generator voltage and the actual vehicle generator current, thereby facilitating data collection.

[0187] Optionally, the testing module 302 is used to:

[0188] Obtaining a fourth output work, wherein the fourth output work at least includes a load dynamometer mechanical work in electric drive mode, a load dynamometer mechanical work in parallel mode, a load dynamometer mechanical work in direct drive mode, a real vehicle drive motor mechanical work in kinetic energy recovery mode, and a real vehicle generator mechanical work in parking power generation mode;

[0189] Obtaining a fourth input work, wherein the fourth input work includes at least the mechanical work of the actual vehicle drive motor in the electric drive mode, the mechanical work of the actual vehicle drive motor in the parallel mode, the mechanical work of the drive dynamometer in the parallel mode, the mechanical work of the drive dynamometer in the direct drive mode, the mechanical work of the load dynamometer in the kinetic energy recovery mode, and the mechanical work of the drive dynamometer in the parking power generation mode;

[0190] The transmission efficiency of the hybrid transmission corresponding to the vehicle to be tested is determined according to the fourth output work and the fourth input work.

[0191] Some embodiments of the present application obtain the fourth output work, i.e., the sum of the mechanical work of the load dynamometer in electric drive mode, the mechanical work of the load dynamometer in parallel mode, the mechanical work of the load dynamometer in direct drive mode, the mechanical work of the actual vehicle drive motor in kinetic energy recovery mode, and the mechanical work of the actual vehicle generator in parking power generation mode, and the input work, i.e., the mechanical work of the actual vehicle drive motor in electric drive mode, the mechanical work of the actual vehicle drive motor in parallel mode, the mechanical work of the drive dynamometer in parallel mode, the mechanical work of the drive dynamometer in direct drive mode, the mechanical work of the load dynamometer in kinetic energy recovery mode, and the mechanical work of the drive dynamometer in parking power generation mode, and then determine the transmission efficiency of the hybrid transmission corresponding to the vehicle to be tested according to the fourth output work and the fourth input work.

[0192] Optionally, the testing module 302 is used to:

[0193] calculating a ratio of a fourth output work to a fourth input work;

[0194] The ratio is determined as the transmission efficiency of the hybrid transmission corresponding to the vehicle to be tested.

[0195] Some embodiments of the present application calculate the ratio of the fourth output work to the fourth input work to obtain the transmission efficiency of the hybrid transmission corresponding to the vehicle to be tested.

[0196] Optionally, the fourth output work is the sum of the mechanical work of the load dynamometer in electric drive mode, the mechanical work of the load dynamometer in parallel mode, the mechanical work of the load dynamometer in direct drive mode, the mechanical work of the actual vehicle drive motor in kinetic energy recovery mode, and the mechanical work of the actual vehicle generator in parking power generation mode.

[0197] Some embodiments of the present application calculate the sum of the mechanical work under different working modes to obtain the output work. In this way, various parameters can be obtained in advance through a test, and the test speed is fast and the data results are accurate.

[0198] Regarding the device in this embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0199] It should be noted that each implementable method in this embodiment may be implemented separately, or may be implemented in combination in any combination without conflict, and this application is not limited thereto.

[0200] The above are only embodiments of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0201] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0202] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A parameter testing method for a hybrid system, characterized in that: Applied to a test terminal, the test terminal is connected to a vehicle to be tested, the vehicle to be tested at least includes a dual-motor hybrid system, and the method includes: When the vehicle to be tested is in different working modes, the test parameters of the vehicle to be tested are obtained, wherein the test parameters include at least: battery simulator voltage and current, actual vehicle drive motor voltage and current, actual vehicle generator voltage and current, actual vehicle drive motor torque speed, actual vehicle generator torque speed, drive dynamometer torque speed, first load dynamometer torque speed and second load dynamometer torque speed; According to the test parameters, efficiency parameters corresponding to the vehicle to be tested are determined, and the efficiency parameters at least include the comprehensive efficiency of the hybrid system, the efficiency of the actual vehicle motor body, the efficiency of the actual vehicle generator body and the transmission efficiency of the hybrid transmission.

2. The parameter testing method of the hybrid system according to claim 1, characterized in that: The working modes include at least electric drive mode, parallel mode, direct drive mode, kinetic energy recovery mode and parking power generation mode.

3. The parameter testing method of the hybrid system according to claim 2, characterized in that: Determining the comprehensive efficiency of the hybrid system corresponding to the vehicle to be tested according to the test parameters includes: Obtaining a first output work, wherein the first output work includes at least a load dynamometer mechanical work in electric drive mode, a load dynamometer mechanical work in parallel mode, a load dynamometer mechanical work in direct drive mode, a battery simulator electric work in kinetic energy recovery mode, and a battery simulator electric work in parking power generation mode; Obtaining a first input work, wherein the first input work includes at least a battery simulator electric work in electric drive mode, a battery simulator electric work in parallel mode, a drive dynamometer mechanical work in parallel mode, a drive dynamometer mechanical work in direct drive mode, a load dynamometer mechanical work in kinetic energy recovery mode, and a drive dynamometer mechanical work in parking power generation mode; The comprehensive efficiency of the hybrid system is determined according to the first input work and the first output work.

4. The parameter testing method of the hybrid system according to claim 3, characterized in that: The mechanical work of the driving dynamometer is calculated based on the driving dynamometer torque and the driving dynamometer speed; The load dynamometer mechanical work at least includes a first load dynamometer mechanical work and a second load dynamometer mechanical work, wherein the first load dynamometer mechanical work is calculated based on the first load dynamometer torque and the first load dynamometer speed; the second load dynamometer mechanical work is calculated based on the second load dynamometer torque and the second load dynamometer speed; The battery simulator electrical work is calculated based on the battery simulator voltage and the battery simulator current.

5. The parameter testing method of the hybrid system according to claim 2, characterized in that: Determining the actual vehicle motor body efficiency corresponding to the vehicle to be tested according to the test parameters includes: Obtaining a second output work, wherein the second output work at least includes the mechanical work of the actual vehicle drive motor in the electric drive mode, the mechanical work of the actual vehicle drive motor in the parallel mode, and the electric work of the actual vehicle drive motor in the kinetic energy recovery mode; Acquire a second input work, wherein the second input work at least includes the electric work of the actual vehicle drive motor in the electric drive mode, the electric work of the actual vehicle drive motor in the parallel mode, and the mechanical work of the actual vehicle drive motor in the kinetic energy recovery mode; The actual vehicle motor body efficiency is determined according to the second input work and the second output work.

6. The parameter testing method of the hybrid system according to claim 5, characterized in that: The mechanical work of the actual vehicle drive motor is calculated based on the actual vehicle drive motor torque and the actual vehicle drive motor speed; The electric work of the actual vehicle driving motor is calculated based on the actual vehicle driving motor voltage and the actual vehicle driving motor current.

7. The parameter testing method of the hybrid system according to claim 2, characterized in that: Determining the actual vehicle generator body efficiency corresponding to the vehicle to be tested according to the test parameters includes: Acquire a third output work, wherein the third output work at least includes the actual vehicle generator electric work in the parking power generation mode; Acquire a third input work, wherein the third input work at least includes the mechanical work of the actual vehicle generator in the parking power generation mode; The actual vehicle generator body efficiency corresponding to the vehicle to be tested is determined according to the third output work and the third input work.

8. The parameter testing method of the hybrid system according to claim 7, characterized in that: The mechanical work of the actual vehicle generator is calculated based on the actual vehicle generator torque and the actual vehicle generator speed; The actual vehicle generator electric work is calculated based on the actual vehicle generator voltage and the actual vehicle generator current.

9. The parameter testing method of the hybrid system according to claim 2, characterized in that: Determining the transmission efficiency of the hybrid transmission corresponding to the vehicle to be tested according to the test parameters includes: Obtaining a fourth output work, wherein the fourth output work at least includes a load dynamometer mechanical work in electric drive mode, a load dynamometer mechanical work in parallel mode, a load dynamometer mechanical work in direct drive mode, a real vehicle drive motor mechanical work in kinetic energy recovery mode, and a real vehicle generator mechanical work in parking power generation mode; Obtaining a fourth input work, wherein the fourth input work at least includes the mechanical work of the actual vehicle drive motor in the electric drive mode, the mechanical work of the actual vehicle drive motor in the parallel mode, the mechanical work of the drive dynamometer in the parallel mode, the mechanical work of the drive dynamometer in the direct drive mode, the mechanical work of the load dynamometer in the kinetic energy recovery mode, and the mechanical work of the drive dynamometer in the parking power generation mode; A transmission efficiency of a hybrid transmission corresponding to the vehicle to be tested is determined according to the fourth output work and the fourth input work.

10. The parameter testing method of the hybrid system according to claim 9, characterized in that: The step of determining the transmission efficiency of the hybrid transmission corresponding to the vehicle to be tested according to the fourth output work and the fourth input work includes: calculating a ratio of the fourth output work to the fourth input work; The ratio is determined as the transmission efficiency of the hybrid transmission corresponding to the vehicle to be tested.

11. The parameter testing method of the hybrid system according to claim 10, characterized in that: The fourth output work is the sum of the mechanical work of the load dynamometer in electric drive mode, the mechanical work of the load dynamometer in parallel mode, the mechanical work of the load dynamometer in direct drive mode, the mechanical work of the actual vehicle drive motor in kinetic energy recovery mode, and the mechanical work of the actual vehicle generator in parking power generation mode.

12. A parameter testing device for a hybrid system, characterized in that: Applied to a test terminal, the test terminal is connected to a vehicle to be tested, the vehicle to be tested includes at least a dual-motor hybrid system, and the device includes: An acquisition module is used to acquire test parameters of the vehicle to be tested when the vehicle to be tested is in different working modes, wherein the test parameters include at least: battery simulator voltage and current, actual vehicle drive motor voltage and current, actual vehicle generator voltage and current, actual vehicle drive motor torque speed, actual vehicle generator torque speed, drive dynamometer torque speed, first load dynamometer torque speed, and second load dynamometer torque speed; The test module is used to determine the efficiency parameters corresponding to the vehicle to be tested according to the test parameters, and the efficiency parameters at least include the comprehensive efficiency of the hybrid system, the efficiency of the actual vehicle motor body, the efficiency of the actual vehicle generator body and the transmission efficiency of the hybrid transmission.

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