Joint test platform of electric automobile

Abstract

The utility model discloses a joint test platform of an electric automobile. The joint test platform comprises a driving motor and a motor controller thereof; the driving motor serves as a tested object, and the motor controller controls power-on and power-off and driving control of the driving motor. The whole vehicle controller is connected with and controls the motor controller; the hardware-in-the-loop system is connected with the vehicle control unit; the hardware-in-the-loop system sends a required torque instruction corresponding to the opening degree of the acceleration and deceleration pedal to a vehicle control unit, the required torque corresponding to the opening degree of the acceleration and deceleration pedal is issued to a motor controller through the vehicle control unit, and the motor controller controls a driving motor to output the required torque; the dynamometer rack is provided with a dynamometer and a dynamometer control system which are connected with each other, the dynamometer is connected with the driving motor, and the dynamometer control system is connected with the hardware-in-the-loop system; when the driving motor outputs the required torque, the dynamometer simulates a real vehicle load to be driven by the driving motor to operate, and the dynamometer control system feeds back the actual output torque of the dynamometer to the hardware-in-the-loop system to complete acceleration and deceleration working condition testing.

Description

Technical Field

[0001] The present application relates to the technical field of whole vehicle testing, and in particular to a joint testing platform for electric vehicles. Background Art

[0002] In existing technology, dynamometers primarily test the general characteristics of drive motors. However, because they lack a vehicle controller and vehicle information input, it's difficult to simulate actual vehicle acceleration and deceleration testing. Consequently, the authenticity of the drive motor test results is limited, making them ineffective as a reference for evaluating the actual performance of the drive motor.

[0003] Therefore, the existing technology has the technical problems that the bench test function for the drive motor is relatively simple and the test results are inaccurate. It is very necessary to conduct a real and comprehensive test on the drive motor. Utility Model Content

[0004] In order to solve or partially solve the technical problems in the prior art that the bench test function for the drive motor is relatively simple and the test results are inaccurate, the utility model provides a joint test platform for electric vehicles. By combining hardware-in-the-loop testing for the vehicle controller and bench testing for the drive motor to perform joint testing, real and comprehensive test data can be obtained, which can shorten and optimize the vehicle development process and promote the development of bench testing for electric vehicles.

[0005] In order to solve the above technical problems, the first aspect of the present invention discloses a joint test platform for electric vehicles, which includes: a hardware-in-the-loop system, a dynamometer test bench, a vehicle controller, a motor controller, and a drive motor; wherein,

[0006] A drive motor and a motor controller thereof; wherein the drive motor is used as a test object, and the motor controller controls the power on and off and the drive control of the drive motor;

[0007] A vehicle controller, connected to and controlling the motor controller;

[0008] a hardware-in-the-loop system connected to the vehicle controller; wherein the hardware-in-the-loop system sends a required torque command corresponding to the acceleration / deceleration pedal opening to the vehicle controller, and sends the required torque corresponding to the acceleration / deceleration pedal opening to the motor controller via the vehicle controller, and the motor controller controls the drive motor to output the required torque;

[0009] A dynamometer stand is equipped with a dynamometer and a dynamometer control system connected to each other, wherein the dynamometer is connected to the drive motor, and the dynamometer control system is connected to the hardware-in-the-loop system; wherein, while the drive motor outputs the required torque, the dynamometer simulates a real vehicle load to be driven by the drive motor, and the dynamometer control system feeds back the actual output torque of the dynamometer to the hardware-in-the-loop system to complete the acceleration and deceleration working condition test.

[0010] Optionally, the system further comprises: a hydrogen fuel rack; a hydrogen fuel cell and a hydrogen fuel cell management system are mounted on the hydrogen fuel rack; wherein,

[0011] The hydrogen fuel cell is connected to the hydrogen fuel cell management system, and the hydrogen fuel cell management system is respectively connected to the motor controller and the vehicle controller; the hydrogen fuel cell management system is controlled by the vehicle controller and controls the hydrogen fuel cell to supply power to the drive motor.

[0012] Optionally, the system further includes: a hydrogen fuel monitoring system for monitoring data of the hydrogen fuel cell when the hydrogen fuel cell is powered or on standby.

[0013] Optionally, the system further includes: the hydrogen supply system is connected to the hydrogen fuel cell and provides fuel thereto.

[0014] Optionally, the hydrogen fuel cell is connected to the drive motor.

[0015] Optionally, the system further includes a power battery and a power battery management system; the power battery management system is connected to the motor controller and the vehicle controller respectively; wherein,

[0016] The power battery management system is controlled by the vehicle controller and controls the power battery to supply power to the drive motor.

[0017] Optionally, the power battery is connected to the drive motor.

[0018] Optionally, the dynamometer stand is further equipped with a frequency converter; wherein the hardware-in-the-loop system controls the frequency converter through the dynamometer control system to supply high voltage power to the dynamometer.

[0019] Optionally, the hardware-in-the-loop system includes: a hardware-in-the-loop test cabinet and a host computer that are communicatively connected; wherein,

[0020] The hardware-in-the-loop test cabinet simulates the actual vehicle operating environment;

[0021] The host computer simulates the driver's operation, generates a required torque instruction corresponding to the acceleration and deceleration pedal opening, and transmits it to the vehicle controller via the hardware-in-the-loop test cabinet.

[0022] Optionally, the dynamometer and the drive motor are mechanically connected.

[0023] Through one or more technical solutions of the present invention, the present invention has the following beneficial effects or advantages:

[0024] The utility model provides a joint test platform for electric vehicles. By combining hardware-in-the-loop testing of the vehicle controller and bench testing of the drive motor to perform joint testing, real and comprehensive test data can be obtained, which can shorten and optimize the vehicle development process and promote the development of electric vehicle bench testing.

[0025] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0027] Figure 1 A structural schematic diagram of a combined test platform for electric vehicles according to an embodiment of the present utility model is shown.

[0028] Explanation of the accompanying drawings: hardware-in-the-loop system 10, dynamometer test bench 20, hydrogen fuel test bench 30, hardware-in-the-loop test cabinet 101, host computer 102, dynamometer control system 201, data acquisition system 2011, dynamometer 202, inverter 203, hydrogen fuel cell 301, hydrogen fuel cell management system 302, hydrogen fuel monitoring system 303, hydrogen supply system 304, drive motor 401, motor controller 402, vehicle controller 50, power battery 601, power battery management system 602. DETAILED DESCRIPTION

[0029] The following describes exemplary embodiments of the present invention in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0030] First, as Figure 1 As shown, an embodiment of the present invention provides a combined test platform for electric vehicles. Specifically, the combined test platform includes: a hardware-in-the-loop system 10, a dynamometer test bench 20, a hydrogen fuel test bench 30, and four electric systems.

[0031] The hardware-in-the-loop system 10 comprises a hardware-in-the-loop test cabinet 101 and a host computer 102 in communicative communication. The hardware-in-the-loop test cabinet 101 simulates the actual vehicle operating environment. The host computer 102 is equipped with a host computer monitoring system 102, which simulates driver operation, generates a required torque command corresponding to the acceleration and deceleration pedal opening, and transmits it to the vehicle controller via the hardware-in-the-loop test cabinet 101. The hardware-in-the-loop system 10 is primarily designed to be tested in conjunction with a dynamometer 20 and simulate the actual vehicle operating environment, providing reliable operating condition data, operating condition commands, and other information for the dynamometer 20 test. This overcomes the dynamometer's lack of vehicle controller and vehicle information input, making it difficult to simulate actual vehicle acceleration and deceleration testing.

[0032] The dynamometer stand 20 is equipped with a dynamometer control system 201, a dynamometer 202, a frequency converter 203, a drive motor 401, and a motor controller 402. The dynamometer control system 201 (including the data acquisition system 2011) is connected to the dynamometer 202 and the hardware-in-the-loop system 10. It is responsible for powering on and off the dynamometer 202, driving control, and collecting parameters such as the drive torque, speed, and temperature of the drive motor 401, as well as the torque, speed, temperature, and hydrogen supply concentration of the fuel cell. The dynamometer 202 is connected to the drive motor 401. Specifically, the dynamometer 202 and the drive motor 401 are mechanically connected, applying a simulated vehicle load to the powertrain under test. The dynamometer control system 201 is also connected to the dynamometer 202 via the frequency converter 203. The hardware-in-the-loop system 10 controls the frequency converter 203 through the dynamometer control system 201 to apply high voltage power to the dynamometer 202. The drive motor 401 is connected to the motor controller 402.

[0033] The four electrical systems mainly include: hydrogen fuel cell system, power battery system, motor drive system and vehicle controller 50.

[0034] The hydrogen fuel cell system is assembled on the hydrogen fuel rack 30 , and includes: a hydrogen fuel cell 301 , a hydrogen fuel cell management system 302 , a hydrogen fuel monitoring system 303 and a hydrogen supply system 304 , and is mainly used to provide electrical energy for the drive motor 401 .

[0035] Among them, the hydrogen fuel cell 301 is connected to the drive motor 401 to provide it with electrical energy. The hydrogen fuel cell 301 is connected to the hydrogen fuel cell management system 302, and the hydrogen fuel cell management system 302 is respectively connected to the motor controller 402 and the vehicle controller 50; the hydrogen fuel cell management system 302 is controlled by the vehicle controller 50, and is responsible for the hydrogen supply control of the fuel cell, controlling the hydrogen fuel cell 301 to supply power to the drive motor 401 and its power generation power control, temperature control and fault detection. In addition, it can also exchange signals with the motor controller 402. The hydrogen supply system 304 is connected to the hydrogen fuel cell 301 and provides it with fuel. In addition, the hydrogen fuel cell 301 can also be connected to the hydrogen fuel cell management system 302 as a measured object. When the hydrogen fuel cell 301 is powered or on standby, its data is monitored through the hydrogen fuel monitoring system 303.

[0036] The power battery system includes a power battery 601 and a power battery management system 602. The power battery 601 is connected to the drive motor 401 to provide power. The power battery management system 602 is connected to the motor controller 402 and the vehicle controller 50. The power battery management system 602 is controlled by the vehicle controller 50 and is responsible for controlling the power supply from the power battery 601 to the drive motor 401 in pure electric mode and the absorption of feedback power in fuel cell mode.

[0037] The motor drive system includes a drive motor 401 and a motor controller 402. The drive motor 401 is used as the object to be measured; the motor controller 402 is responsible for powering on and off the drive motor 401 and for drive control.

[0038] Since the dynamometer 202 lacks the vehicle controller 50 and vehicle information input, it is difficult to simulate acceleration, deceleration and other working condition tests on the actual vehicle. For this reason, the utility model combines the hardware-in-the-loop system 10 with the dynamometer bench 20 for joint testing to simulate the actual vehicle operating environment. Typical working conditions (including starting, acceleration, coasting, braking, cruise control, and cycle conditions) are selected for experiments, thereby forming a relatively complex joint test platform composed of a real dynamometer bench, a vehicle controller, a real drive motor hardware-in-the-loop system (and a real hydrogen fuel cell platform), which greatly expands the function of the experimental platform test, is conducive to further shortening and optimizing the vehicle development process, and promotes the development of electric vehicle bench testing.

[0039] Please refer to the specific test architecture below. It is worth noting that the acceleration and deceleration conditions are used as examples here, but this does not constitute a limitation.

[0040] A driving motor 401 and a motor controller 402 thereof; wherein the driving motor 401 is used as a measured object, and the motor controller 402 controls the power on and off and driving control of the driving motor 401 .

[0041] The vehicle controller 50 is loaded with the vehicle control software and is connected to and controls the motor controller 402. The vehicle controller 50 can also be tested as a test object.

[0042] The hardware-in-the-loop system 10 is connected to the vehicle controller 50 ; the hardware-in-the-loop system 10 integrates a driver model, a vehicle model, etc., and provides a real vehicle operating environment for testing.

[0043] The dynamometer stand 20 is equipped with a dynamometer 202 and a dynamometer control system 201 connected to each other. The dynamometer 202 is connected to the drive motor 401, and the dynamometer control system 201 is connected to the hardware-in-the-loop system 10.

[0044] During the test, the hardware-in-the-loop system 10 sends the required torque instruction corresponding to the acceleration and deceleration pedal opening to the vehicle controller 50, and the required torque corresponding to the acceleration and deceleration pedal opening is sent to the motor controller 402 via the vehicle controller 50. The motor controller 402 controls the drive motor 401 to output the required torque. While the drive motor 401 outputs the required torque, the dynamometer 202 simulates the actual vehicle load to be driven by the drive motor 401, and the dynamometer control system 201 feeds back the actual output torque of the dynamometer 202 to the hardware-in-the-loop system 10 to complete the acceleration and deceleration working condition test.

[0045] The above is a test of the deceleration and acceleration conditions. In actual applications, the vehicle starting, acceleration, coasting, climbing, braking, cruise control, circulation and other conditions can also be simulated to conduct a real and comprehensive test of the vehicle controller 50 and the motor.

[0046] In order to further illustrate and explain the implementation principle of the joint testing platform of the present utility model, the following is a detailed introduction starting from the construction of the platform.

[0047] according to Figure 1 As shown in the system functional block diagram, a joint test bench is built. After the bench is built and inspected, the following inspections are carried out first:

[0048] Check whether the joint test bench connections and bolts are normal, and check whether the cooling water system of the drive motor 401 is normal.

[0049] Check the temperature of the drive motor 401 and whether the water inlet of the drive motor 401 of the water temperature constant temperature system is normal. According to the specific situation, open the water inlet and outlet switches of the constant temperature system to ensure that the water inlet and outlet switches are open during use.

[0050] Check whether the fuel cell hydrogen supply channel and water supply system are normal.

[0051] After ensuring that the dynamometer bench 20 is running stably, open the host computer 102 test software, check whether the motor parameters are normal on the test interface, control the control system in automatic mode, and data monitoring and acquisition will automatically collect data from the drive motor 401, after confirming that the host computer 102 experimental control software is normal.

[0052] Open the fuel cell host computer 102 software and check whether various parameters such as battery insulation, hydrogen leakage, air pressure, and water temperature are normal. Perform nitrogen and air purges on the fuel cell to ensure that the fuel cell is in standby mode. In automatic mode, the battery host computer 102 will automatically record various data such as power output, temperature control curves, and fault alarms.

[0053] The hardware-in-the-loop system 10 controls the frequency converter 203 to supply high voltage power to the dynamometer 202 through the dynamometer control system 201 , and controls the high voltage power to the drive motor 401 .

[0054] In the fuel cell mode, the hydrogen fuel cell management system 302 completes internal purge, controls the opening of the hydrogen supply channel, and completes the power supply of the drive motor 401 by controlling the hydrogen supply ratio after receiving the fuel cell power supply demand.

[0055] In the standby mode of the hydrogen fuel cell 301, the hardware-in-the-loop system 10 transmits the current required power to the vehicle controller 50. The vehicle controller 50 calculates the overall energy ratio of the hydrogen fuel cell 301 and the power battery 601, controls the optimal working range of the fuel cell, and sends the final required power to the hydrogen fuel cell management system 302. The hydrogen fuel cell management system 302 controls the opening and closing status of the valves of the hydrogen supply system 304 and the hydrogen supply concentration, so that the fuel cell operates under power control.

[0056] Furthermore, upon receiving a power request from the vehicle controller 50, the fuel cell controller activates the hydrogen supply channel and gradually increases the battery output power to the required power. During this process, power compensation and feedback are absorbed by the power battery 601. The drive motor 401 operates normally and is tested under typical operating conditions. The fuel cell host computer 102 records and analyzes the battery operating parameters. This completes the integrated commissioning and testing of the hydrogen fuel cell system, drive motor 401, and vehicle controller 50.

[0057] During the test, taking acceleration and deceleration conditions as an example, driver operations are simulated on the host computer 102 monitoring system. Operational instructions are transmitted to the vehicle controller 50 via the hardware-in-the-loop system 10. After receiving the high-voltage power-on instruction, the vehicle controller 50 controls the motor controller 402 to complete the high-voltage power-on of the drive motor 401. Furthermore, after obtaining the required torque instruction corresponding to the acceleration and deceleration pedal opening, the required torque is fed back to the hardware-in-the-loop system 10. The hardware-in-the-loop system 10 calculates the dynamometer motor speed by combining the actual operating conditions such as acceleration and deceleration. Finally, the hardware-in-the-loop system 10 controls the dynamometer motor speed through the dynamometer control system 201, ensuring that the dynamometer 202 operates at the required speed.

[0058] Once dynamometer 202 is operating normally, hardware-in-the-loop system 10 transmits the required torque command corresponding to the acceleration / deceleration pedal opening to drive motor 401 via vehicle controller 50, causing drive motor 401 to operate under torque control. Simultaneously, data acquisition system 2011 of dynamometer control system 201 collects data from drive motor 401 and transmits the collected data to hardware-in-the-loop system 10 and vehicle controller 50. Dynamometer 202 simulates the actual vehicle load to achieve closed-loop control of vehicle driving, thereby completing the operating condition test. Of course, once operation stabilizes, hardware-in-the-loop system 10 reads the actual powertrain torque fed back by dynamometer control system 201 (data acquisition system 2011) and analyzes the consistency between the actual powertrain output torque and the current accelerator pedal opening (required torque) curve.

[0059] According to the above control principle, the hardware-in-the-loop system 10 and the vehicle controller 50 adjust typical operating conditions including starting, acceleration, coasting, climbing, braking, cruise control, and cyclic conditions, and analyze the consistency of the corresponding curves, thereby completing the joint debugging test of the drive motor 401 and the vehicle controller 50.

[0060] Through the joint test system of the hardware-in-the-loop system 10 and the dynamometer bench 20, typical working conditions including starting, acceleration, coasting, climbing, braking, cruise control, and cyclic working conditions were selected for experiments, forming a relatively complex joint test platform composed of a real dynamometer bench, a real hydrogen fuel cell platform, a vehicle controller and a real drive motor-in-the-loop system. This greatly expands the function of the experimental platform test, is conducive to further shortening and optimizing the vehicle development process, and promotes the development of electric vehicle bench testing.

[0061] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0062] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A joint test platform for electric vehicles, characterized in that: The joint test platform includes: hardware-in-the-loop system, dynamometer test bench, vehicle controller, motor controller, and drive motor; A drive motor and a motor controller thereof; wherein the drive motor is used as a test object, and the motor controller controls the power on and off and the drive control of the drive motor; A vehicle controller, connected to and controlling the motor controller; a hardware-in-the-loop system connected to the vehicle controller; wherein the hardware-in-the-loop system sends a required torque command corresponding to the acceleration / deceleration pedal opening to the vehicle controller, and sends the required torque corresponding to the acceleration / deceleration pedal opening to the motor controller via the vehicle controller, and the motor controller controls the drive motor to output the required torque; A dynamometer stand is equipped with a dynamometer and a dynamometer control system connected to each other, wherein the dynamometer is connected to the drive motor, and the dynamometer control system is connected to the hardware-in-the-loop system; wherein, while the drive motor outputs the required torque, the dynamometer simulates a real vehicle load to be driven by the drive motor, and the dynamometer control system feeds back the actual output torque of the dynamometer to the hardware-in-the-loop system to complete the acceleration and deceleration working condition test.

2. The joint testing platform according to claim 1, wherein: The system further comprises: a hydrogen fuel platform; a hydrogen fuel cell and a hydrogen fuel cell management system are mounted on the hydrogen fuel platform; wherein, The hydrogen fuel cell is connected to the hydrogen fuel cell management system, and the hydrogen fuel cell management system is respectively connected to the motor controller and the vehicle controller; the hydrogen fuel cell management system is controlled by the vehicle controller and controls the hydrogen fuel cell to supply power to the drive motor.

3. The joint testing platform according to claim 2, wherein: The system further comprises: a hydrogen fuel monitoring system for monitoring data of the hydrogen fuel cell when the hydrogen fuel cell is powered or in standby mode.

4. The joint testing platform according to claim 2, wherein: The system further comprises: a hydrogen supply system connected to the hydrogen fuel cell and providing fuel thereto.

5. The joint testing platform according to claim 2, wherein: The hydrogen fuel cell is connected to the drive motor.

6. The joint testing platform according to claim 1, wherein: The system also includes a power battery and a power battery management system; the power battery management system is connected to the motor controller and the vehicle controller respectively; wherein, The power battery management system is controlled by the vehicle controller and controls the power battery to supply power to the drive motor.

7. The joint testing platform according to claim 6, wherein: The power battery is connected to the drive motor.

8. The joint testing platform according to claim 1, wherein: The dynamometer bench is also equipped with a frequency converter; wherein the hardware-in-the-loop system controls the frequency converter through the dynamometer control system to supply high voltage power to the dynamometer.

9. The joint testing platform according to claim 1, wherein: The hardware-in-the-loop system includes: a hardware-in-the-loop test cabinet and a host computer that are communicatively connected; wherein, The hardware-in-the-loop test cabinet simulates the actual vehicle operating environment; The host computer simulates the driver's operation, generates a required torque instruction corresponding to the acceleration and deceleration pedal opening, and transmits it to the vehicle controller via the hardware-in-the-loop test cabinet.

10. The joint testing platform according to claim 1, wherein: The dynamometer is mechanically connected to the drive motor.

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