Distributed electric drive EOL test system and test method

Abstract

The invention belongs to the technical field of electric drive EOL testing, and particularly relates to a distributed electric drive EOL testing system and method, and the system comprises a first upper computer which is in communication connection with a to-be-tested electric drive assembly; an output shaft of the dynamometer is in transmission connection with an output shaft of the electric drive assembly through a torque meter, and the dynamometer and the torque meter are in communication connection with the first upper computer; the first upper computer is used for synchronously sending corresponding instructions to the electric drive assembly and the dynamometer according to a preset test working condition so as to control the electric drive assembly and the dynamometer to accurately and cooperatively operate, and storing rotating speeds and torques collected by the dynamometer and the torquemeter in real time; the second upper computer is in communication connection with the first upper computer and the three-party test equipment; the second upper computer is used for responding to an electric drive EOL test instruction triggered by a user and informing the first upper computer, so that the first upper computer controls the dynamometer and the electric drive assembly to start testing; and the second upper computer is also used for controlling the three-party test equipment to assist in completing the test.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric drive EOL testing, and in particular relates to a distributed electric drive EOL testing system and testing method. Background Art

[0002] The electric drive EOL (End-of-Line) test is a comprehensive test conducted on the electric drive system of new energy vehicles before leaving the factory. By checking whether the various performance indicators of the electric drive system, such as power, torque, and speed, meet the design requirements, it is ensured that it can provide sufficient power support during vehicle operation and can operate stably under different operating conditions, preventing products with quality problems from entering the market, thereby improving the overall quality and reliability of the product.

[0003] However, current electric drive EOL test equipment uses a single operating system and single host software, or a PLC (programmable logic controller) + single host software approach to implement the entire test. This makes it difficult to ensure high-speed coordinated control of the host software over the dynamometer and electric drive assembly, which in turn affects the accuracy and reliability of the test. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a dual operating system and dual host software method to implement electric drive EOL testing. The two host software run in two sets of operating systems, making them independent of each other. In addition, one host software is only responsible for processing the high-speed coordination between the dynamometer and the electric drive assembly, and the other host software is responsible for processing the entire set of test logic, which can ensure that the entire set of tests runs in real time.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a distributed electric drive EOL test system, comprising: a first host computer, communicatively connected to an electric drive assembly to be tested to simulate a real vehicle environment; a dynamometer, wherein an output shaft is drivingly connected to the output shaft of the electric drive assembly via a torque meter, and the dynamometer and the torque meter are communicatively connected to the first host computer respectively; the first host computer is configured to synchronously send corresponding instructions to the electric drive assembly and the dynamometer according to a preset test condition, so as to control the electric drive assembly and the dynamometer to operate accurately and in coordination, and to store in real time the speed and torque collected by the dynamometer and the torque meter in real time; a second host computer, communicatively connected to the first host computer and three-party test equipment; the second host computer is configured to respond to user-triggered instructions regarding electric drive EOL testing, and notify the first host computer, so that the first host computer controls the dynamometer and the electric drive assembly to start testing; The second host computer is also used to control third-party testing equipment to assist in completing the test.

[0006] According to a specific embodiment of the present invention, two groups of dynamometers and torque meters are included, wherein the output shaft of one group of dynamometers is transmission-connected to the left-half output shaft of the electric drive assembly through the torque meter, and the output shaft of the other group of dynamometers is transmission-connected to the right-half output shaft of the electric drive assembly through the torque meter.

[0007] According to a specific embodiment of the present invention, the three-party testing equipment includes: a power analyzer, a vibration and noise testing equipment, and an oil cooling testing equipment.

[0008] According to a specific embodiment of the present invention, during the EOL test of the electric drive assembly, the first host computer is further configured to perform closed-loop control of the electric drive assembly based on test data fed back in real time by the dynamometer and the torque meter.

[0009] A testing method based on a distributed electric drive EOL test system is applied to a first host computer in the distributed electric drive EOL test system, comprising: obtaining an instruction regarding an electric drive EOL test transmitted by a second host computer in the distributed electric drive EOL test system; responding to a test execution item arranged by the second host computer based on the instruction, and controlling the electric drive assembly to be tested and a dynamometer to accurately coordinate operation according to preset test conditions to perform corresponding tests.

[0010] According to a specific embodiment of the present invention, based on the instructions, responding to the test items arranged by the second host computer, and controlling the electric drive assembly to be tested and the dynamometer to operate precisely in coordination according to the preset test conditions to perform the corresponding test steps include: for each test, transmitting the stored test data to the second host computer after the test is completed.

[0011] According to a specific embodiment of the present invention, based on the instruction, responding to the test items arranged by the second host computer, and controlling the electric drive assembly to be tested and the dynamometer to operate precisely in coordination according to the preset test conditions to perform the corresponding test steps also includes: when any test fails, notifying the second host computer to stop the electric drive EOL test.

[0012] A testing method based on a distributed electric drive EOL test system is applied to a second host computer in the distributed electric drive EOL test system, comprising: responding to an electric drive EOL test triggered by a user and generating instructions to transmit to a first host computer in the distributed electric drive EOL test system; sequentially notifying the first host computer to execute corresponding test items according to a preset test logic sequence of the electric drive EOL test, and controlling three-party test equipment to assist in completing the test; and after the electric drive EOL test is completed, generating and uploading a corresponding test report based on stored test data.

[0013] According to a specific embodiment of the present invention, the test logic sequence preset for the electric drive EOL test includes a wake-up test, a self-learning test, an efficiency test, a vibration and noise test, and an oil pump test, and the first host computer is notified in sequence to execute the corresponding test items according to the test logic sequence preset for the electric drive EOL test, and the three-party test equipment is controlled to assist in completing the test, including: notifying the first host computer in sequence to execute the corresponding test items according to the test logic sequence of the wake-up test, the self-learning test, the efficiency test, and the vibration and noise test, and controlling the three-party test equipment to assist in completing the test; after the vibration and noise test is completed, controlling the three-party test equipment to perform the oil pump test.

[0014] According to a specific embodiment of the present invention, the method further includes: stopping the electric drive EOL test when any test fails, and generating and uploading a corresponding test report based on the stored test data.

[0015] The present invention provides an electric drive EOL test system controlled by a dual operating system and dual host computer software. One host computer software is only responsible for processing the high-speed coordination between the dynamometer and the electric drive assembly, while the other host computer software is responsible for processing the entire set of test logic, thus ensuring the real-time operation of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a specific embodiment of a distributed electric drive EOL test system provided by the present invention; Figure 2 This is a structural schematic diagram of another specific embodiment of a distributed electric drive EOL test system provided by the present invention; Figure 3 This is a flow chart of a specific embodiment of a test method based on a distributed electric drive EOL test system provided by the present invention; Figure 4 This is a flow chart of another specific embodiment of a test method based on a distributed electric drive EOL test system provided by the present invention; Figure 5 This is a flow chart of another specific embodiment of a testing method based on a distributed electric drive EOL testing system provided by the present invention. DETAILED DESCRIPTION

[0017] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0019] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless they conflict.

[0020] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring the embodiments of the present invention.

[0021] See Figure 1 、 2 The distributed electric drive EOL testing system shown includes a first host computer 10 and a second host computer 20, which are host computer software corresponding to two operating systems, and are used to cooperate with each other to complete the EOL testing of the electric drive assembly. It should be noted that the two operating systems mentioned in this embodiment refer to the operating systems installed on two different computer devices, and the host computer software is configured based on the corresponding operating systems to provide an operator with a user interface to enable monitoring, control, and configuration of matters related to the electric drive EOL testing, thereby forming the above-mentioned first host computer 10 and second host computer 20.

[0022] Specifically, the first host computer 10 needs to be connected to the electric drive assembly to be tested. In order to simulate the actual vehicle environment, the first host computer 10 and the electric drive assembly can use the CAN bus for handshake communication. It can be understood that the CAN bus supports high-speed, real-time data transmission, and its communication rate can reach 125Kbps to 1Mbps, which can meet the strict real-time requirements between the electric drive assembly and the vehicle terminal in new energy vehicles. Therefore, the CAN bus is currently mostly used to achieve communication connection, but this is not used to limit the communication method between the first host computer 10 and the electric drive assembly. For example, other high-speed, real-time data transmission protocols can also be used. Without excessive restrictions, modifications and embellishments made to the embodiments of the present invention by those skilled in the art without departing from the spirit of the present invention still fall within the scope of the invention application of the present invention.

[0023] Secondly, the test system is also equipped with a dynamometer 30 and a torque meter 40. The dynamometer 30 can be used to simulate the load conditions of the electric drive assembly under different test conditions and detect its rotational speed in real time, while the torque meter 40 can detect the output torque of the electric drive assembly in real time. Accordingly, the output shaft of the dynamometer 30 needs to be connected to the output shaft of the electric drive assembly through the torque meter 40. The specific mechanical connection method is not excessively limited and falls within the scope of protection of this application. Modifications and modifications made by those skilled in the art to the embodiments of the present invention without departing from the spirit of the present invention will still fall within the scope of the invention application of the present invention.

[0024] It can be understood here that in actual applications, the electric drive assembly needs to output different power and torque according to factors such as vehicle speed and road conditions. The high-speed collaboration between the dynamometer and the electric drive assembly can accurately simulate the load state of the electric drive assembly under conditions such as acceleration, climbing, and high-speed cruising. For example, when simulating a vehicle climbing at high speed, the dynamometer can respond quickly and apply the corresponding load, so that the electric drive assembly outputs enough torque to overcome the resistance, thereby accurately detecting the performance indicators of the electric drive assembly under these conditions. In addition, the working conditions of the vehicle are dynamically changing. The high-speed collaboration between the dynamometer and the electric drive assembly can capture these instantaneous changes, adjust the load and output in real time, simulate the working state of the electric drive assembly during frequent acceleration, deceleration, sudden braking and other operations, and test the dynamic response capability of the electric drive assembly. Therefore, during the electric drive EOL test, through the high-speed collaboration between the dynamometer and the electric drive assembly, the electric drive assembly can be pushed to its design limit state, such as high speed, high torque, high power output, etc., to detect the reliability and stability of the electric drive assembly under extreme conditions, discover possible problems such as overheating, overload, vibration, noise, etc. in the electric drive assembly in advance, and evaluate the safety margin of the electric drive assembly.

[0025] At the same time, for the EOL test of the electric drive assembly, closed-loop control between the dynamometer 30 and the electric drive assembly is the core technology, and the real-time requirements for the test data are higher. This requires the first host computer 20 to be able to store the speed and torque collected by the dynamometer 30 and the torque meter 40 in real time, and further adjust the electric drive assembly according to the real-time test data to achieve feedback control.

[0026] In this embodiment, the electric drive assembly is communicatively connected to the first host computer 10. To ensure real-time data transmission, the corresponding dynamometer 30 and torque meter 40 need to communicate directly with the first host computer 10 to provide real-time test data, enabling the first host computer 10 to implement closed-loop control based on the data. Data transmission between the dynamometer 30 and torque meter 40 and the first host computer 10 can utilize Ethernet handshake communication, without further limitation.

[0027] In addition, in order to ensure high-speed collaboration between the first host computer 10 and the electric drive assembly, there are certain requirements for the performance of the first host computer 10, which is required to have good real-time performance and high communication transmission efficiency. For example, the Linux operating system or the Beckhoff operating system can be used, and there is no limitation to this. The modifications and embellishments made to the embodiments of the present invention by those skilled in the art without departing from the spirit of the present invention still fall within the scope of the invention patent application of the present invention.

[0028] In a specific embodiment, since the electric drive assembly generally includes two output shafts, namely a left-half output shaft and a right-half output shaft, two sets of dynamometers 30 and torque meters 40 need to be symmetrically arranged, and the two sets of dynamometers 30 and torque meters 40 are respectively connected to the left-half output shaft and the right-half output shaft of the electric drive assembly. However, it is understood that this does not limit the number of dynamometers 30 and torque meters 40. Specifically, they can be arranged according to the output shafts of the electric drive assembly to apply a load to the electric drive assembly, simulate actual load conditions, and detect the speed and torque of the electric drive assembly in real time. There is no limitation on this. Modifications and modifications made by those skilled in the art to the embodiments of the present invention without departing from the spirit of the present invention still fall within the scope of the invention application of the present invention.

[0029] Furthermore, the second host computer 20 needs to establish a communication connection with the first host computer 10, which can also use Ethernet for handshake communication, and then the first host computer 10 and the second host computer 20 cooperate with each other to complete the EOL test of the electric drive assembly.

[0030] In addition, the test system is also configured with some other third-party test equipment to assist in completing the electric drive EOL test, such as power analyzers, vibration and noise test equipment, oil cooling test equipment, etc., and these test equipment can be connected to the second host computer 20 for communication and operation controlled by the second host computer 20, such as using Ethernet for handshake communication. It can also be understood that the configured third-party test equipment may also need to be connected to the electric drive assembly, such as the power analyzer needs to be electrically connected to the electric drive assembly to detect the input current and voltage of the electric drive assembly in order to calculate the electric power, or the oil cooling test equipment needs to be mechanically fixedly connected to the oil pump of the electric drive assembly, etc. This will not be described in detail. Specifically, the corresponding third-party test equipment can be configured according to the test content of the actual electric drive EOL test, and the normal connection between the three-party test equipment and the electric drive assembly is ensured to enable testing.

[0031] It should be noted that in the electric drive EOL test, there is no high requirement for the real-time performance of the test data collected by the above-mentioned third-party test equipment, and the corresponding operation can be directly controlled by the second host computer 20. However, it can be understood that if it is necessary to operate in coordination with the electric drive assembly at high speed, and there are certain requirements for data transmission efficiency and / or data real-time performance, it can also be directly connected to the first host computer 10 for communication.

[0032] Based on the architecture of the above-mentioned test system, the second host computer 20 can respond to the user-triggered instruction regarding the electric drive EOL test, and notify the first host computer 10 to start the test according to the preset test logic, or organize the test logic by itself. After receiving the corresponding notification from the second host computer 20, the first host computer 10 can synchronously send corresponding instructions to the electric drive assembly and the dynamometer 30 according to the preset test conditions to control the electric drive assembly and the dynamometer to operate precisely in coordination to perform the EOL test of the electric drive assembly. At the same time, the first host computer 10 can store the speed and torque collected by the dynamometer 30 and the torque meter 40 in real time, and perform closed-loop control of the electric drive assembly. The second host computer 20 will also control the three-party test equipment to assist in completing the test.

[0033] As can be seen, one host computer is solely responsible for handling the high-speed coordination between the dynamometer and the electric drive assembly, while the other host computer handles the test logic for the entire electric drive EOL test, thereby ensuring the accuracy of the electric drive EOL test. Furthermore, the two host computer software runs within two operating systems, corresponding to the first host computer 10 and the second host computer 20, making them mutually independent. A failure in one will not affect the normal operation of the other. This allows the equipment to be safely reset regardless of its condition, further ensuring the reliability of the electric drive EOL test.

[0034] Compared with the testing method of a single operating system and a single host computer software, this application has a greater advantage in the real-time performance of the testing process, and compared with the testing method of a PLC and a single host computer software, it has a greater advantage in the controllability of the logical closed loop.

[0035] For details, please refer to Figure 3 、 4 As shown in , 5 , a corresponding test method based on the above-mentioned distributed electric drive EOL test system is also provided.

[0036] Among them, for the first host computer, the following method can be used: Step S110 , obtaining an instruction on the electric drive EOL test transmitted by a second host computer in the distributed electric drive EOL test system.

[0037] Step S120 , based on the instruction, respond to the test items arranged by the second host computer, and control the electric drive assembly to be tested and the dynamometer to accurately coordinate and operate according to the preset test conditions to perform the corresponding test.

[0038] For the second host computer, you can follow the following method: Step S210 , responding to the electric drive EOL test triggered by the user, and generating an instruction to transmit to the first host computer in the distributed electric drive EOL test system.

[0039] Step S220 , notifying the first host computer to execute corresponding test items in sequence according to the preset test logic sequence of the electric drive EOL test, and controlling the three-party test equipment to assist in completing the test.

[0040] Step S230: After the electric drive EOL test is completed, a corresponding test report is generated and uploaded based on the stored test data.

[0041] First, the electric drive assembly to be tested needs to be connected to the test system, including communication connections, mechanical connections, electrical connections, etc. After the distributed electric drive EOL test system described above is connected, the electric drive EOL test can be started accordingly. In addition, since the second host computer is responsible for arranging the test logic, after the operator triggers the electric drive EOL test through the second host computer, the second host computer can respond to the operator-triggered electric drive EOL test and generate corresponding instructions to transmit to the first host computer, notifying the first host computer to start the EOL test.

[0042] In this regard, Figure 5As shown, after the second host computer responds to the electric drive EOL test command triggered by the operator, it starts to arrange the test logic, prepares to perform relevant tests, and simultaneously notifies the first host computer. It can be understood here that the test logic sequence can be pre-set and stored in the second host computer, or it can be arranged by the second host computer according to the actual situation of the electric drive assembly, or it can be temporarily input by the operator, and there is no restriction on this. In this embodiment, the specific test logic sequence can be referred to Figure 3 shown.

[0043] Therefore, the second host computer will notify the first host computer to perform a wake-up test on the electric drive assembly first to start the electric drive assembly and verify whether it can start and operate normally. In addition, since the electric drive assembly and the dynamometer are directly controlled by the first host computer, high-speed coordination between the electric drive assembly and the dynamometer can be achieved. Figure 4 As shown, the first host computer responds to the test item assigned by the second host computer and controls the electric drive assembly and dynamometer to start synchronous operation according to the test conditions preset for the test item, completing the corresponding test. Because the first test item is a wake-up test, the first host computer controls the dynamometer and electric drive assembly to operate in coordination according to the test conditions preset for the wake-up test.

[0044] After the wake-up test is completed, since the relevant test data during the test, that is, the speed and torque collected by the dynamometer and torque meter are directly transmitted to the first host computer, the corresponding first host computer also needs to transfer the stored test data to the second host computer for aggregation so that the data set can be analyzed and processed. At the same time, the first host computer will also notify the second host computer that the test is complete and the next test can be carried out. It can be understood here that if the wake-up test fails, it means that there is a problem with the electric drive assembly and it needs to be repaired. The corresponding first host computer will notify the second host computer of the test failure, and the second host computer will stop the electric drive EOL test and issue an alarm to remind the operator. At the same time, a corresponding test report is generated based on the relevant data during the test for the operator to query.

[0045] It should be added that the transmission of test data from the first host computer to the second host computer is not limited to after the test is completed. The real-time collected test data can also be transmitted to the second host computer during the test, so that the second host computer can analyze the status and performance of the electric drive assembly in real time based on the test data.

[0046] Furthermore, after the wake-up test is completed, the second host computer notifies the first host computer to begin a self-learning test. The first host computer responds to the test items scheduled by the second host computer and controls the coordinated operation of the electric drive assembly and the dynamometer according to the test conditions preset by the self-learning test. It should be noted that the self-learning test of the electric drive assembly is a testing method in which the electric drive assembly automatically acquires and adapts to operating parameters, characteristics, and status information through its own operation and data processing. The electric drive assembly includes multiple components such as the motor, controller, and reducer. The self-learning test enables these components to adapt to each other, find the optimal operating point, and achieve overall performance optimization. For example, through self-learning, the motor and controller can accurately match torque output and control strategies, improving power transmission efficiency. Furthermore, the self-learning test allows the electric drive assembly to automatically adjust parameters to adapt to different operating conditions based on actual operating conditions. Therefore, before officially testing other performance of the electric drive assembly, pre-testing through the wake-up test and self-learning test can fully detect the potential capabilities and potential problems of the electric drive assembly, so as to better prepare for the subsequent efficiency test and vibration and noise test.

[0047] Specifically, the relevant content of the self-learning test includes: operating the electric drive assembly under unloaded working conditions to enable it to initialize and self-learn basic parameters, such as measuring and recording the motor's no-load speed, back electromotive force and other parameters to provide basic data for subsequent loaded operation; applying different degrees of load to the electric drive assembly to simulate various working conditions in actual vehicle driving, so that it can self-learn under load. By collecting data such as current, voltage, torque, and speed under different loads, the control parameters and strategies are further optimized; during the operation of the electric drive assembly, external conditions such as ambient temperature and humidity are continuously changed so that it automatically adapts to these changes and performs self-learning. In this way, the electric drive assembly can maintain stable performance under various environmental conditions. Accordingly, this requires the first host computer to control the high-speed coordinated operation between the electric drive assembly and the dynamometer to ensure the accuracy and reliability of the test.

[0048] Similarly, after the test is completed, the first host computer needs to transfer the stored test data to the second host computer for aggregation and notify the second host computer that the test is complete and the next test can be carried out. If the test fails, the second host computer stops the electric drive EOL test based on the notification from the first host computer.

[0049] After the self-learning test is complete, the next step is to conduct an efficiency test, which tests the electric drive assembly's input electrical power and output mechanical power, thereby testing the power conversion efficiency of the electric drive assembly. Accordingly, it is necessary to simulate a variety of different test conditions, making the electric drive assembly operate at different static speeds and torques to test the corresponding conversion efficiency. This also requires the dynamometer and electric drive assembly to operate in coordination at high speed. That is, by controlling the dynamometer to simulate a load condition at a preset static speed, and synchronously controlling the electric drive assembly to output a preset static torque, and finally calculating the real-time output mechanical power of the electric drive assembly by collecting the actual speed and torque values in real time.

[0050] It is understandable that the above operations all need to be performed by the first host computer to achieve closed-loop control of the electric drive assembly. Therefore, the second host computer notifies the first host computer to start the efficiency test, and the first host computer can control the dynamometer and the electric drive assembly to run synchronously according to the preset test conditions or the test conditions temporarily input by the operator, so as to detect the speed and torque during the test in real time. The real-time acquisition of electric power does not require the high-speed synchronous operation of the dynamometer and the electric drive assembly to be realized. It only requires the power analyzer to be connected to the power supply end of the electric drive assembly through the current sensor and the voltage sensor, and can be directly controlled by the second host computer. After the test starts, the second host computer controls the power analyzer to assist in completing the test, and can analyze the conversion efficiency of the electric drive assembly in real time based on the test data transmitted by the first host computer and the test data collected by the power analyzer.

[0051] Furthermore, for the vibration and noise test, similar to the efficiency test described above, the second host computer notifies the first host computer to start the efficiency test, and the first host computer can control the dynamometer and the electric drive assembly to run synchronously according to the preset test conditions or the test conditions temporarily input by the operator, so as to make the electric drive assembly run according to the preset speed and torque. Secondly, the detection of vibration and noise does not require the high-speed synchronous operation of the dynamometer and the electric drive assembly. The corresponding vibration and noise test equipment can be directly controlled by the second host computer. After the test starts, the second host computer controls the vibration and noise test equipment to assist in completing the test, and can analyze the noise capability of the electric drive assembly based on the test data collected in real time by the vibration and noise test equipment.

[0052] It should be noted here that the vibration and noise test requires the first host computer to control the electric drive assembly to operate at different dynamic speeds and torques. That is, the dynamometer and electric drive assembly are controlled to work in coordination with real-time changing speed and torque values. This control consumes a lot of memory on the host computer. If this part of the control capability is integrated into the second host computer, it will seriously affect the complete electric drive EOL test.

[0053] Finally, the oil pump test can be directly completed by the second host computer controlling the oil cooling test equipment, and this will not be described in detail. Furthermore, there are no restrictions on the electric drive EOL test and its specific test content. Test content can be added, deleted, or adjusted to meet actual needs. Any modifications and improvements made by those skilled in the art to the embodiments of the present invention without departing from the spirit of the present invention will still fall within the scope of the present invention.

[0054] Based on the above test content and the test data during the corresponding test process, the second host computer can generate a detailed test report and feed it back to the operator, so that the operator can check whether the status and performance of the electric drive assembly meet the standards.

[0055] As can be seen from the above content, the coordinated operation between the dynamometer and the electric drive assembly is achieved by the control of the first host computer. This part of the control has extremely high real-time requirements and consumes a lot of system program memory. Separating this part of the control can greatly improve the operating environment of the second host computer. The second host computer is only responsible for arranging the test logic and controlling the three-party test equipment to assist in completing the test, as well as preserving the process data of the entire test. These controls require high program priority and complex logic, but do not have high real-time requirements. Therefore, the dual operating system combined with dual host computers can effectively improve the accuracy and reliability of electric drive EOL testing.

[0056] In summary, the present invention provides an electric drive EOL test system controlled by a dual operating system and dual host computer software. One host computer software is only responsible for handling the high-speed coordination between the dynamometer and the electric drive assembly, while the other host computer software is responsible for processing the entire set of test logic, which can ensure the real-time operation of the test.

[0057] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A distributed electric drive EOL test system, characterized in that: include: The first host computer is connected to the electric drive assembly to be tested to simulate the actual vehicle environment; A dynamometer, the output shaft of which is drivingly connected to the output shaft of the electric drive assembly through a torque meter, and the dynamometer and the torque meter are respectively communicatively connected to the first host computer; The first host computer is used to synchronously send corresponding instructions to the electric drive assembly and the dynamometer according to a preset test condition to control the electric drive assembly and the dynamometer to operate accurately and collaboratively, and to store the speed and torque collected by the dynamometer and the torque meter in real time; A second host computer is communicatively connected to the first host computer and the three-party test equipment; The second host computer is used to respond to a user-triggered instruction regarding an electric drive EOL test and notify the first host computer so that the first host computer controls the dynamometer and the electric drive assembly to start the test; The second host computer is also used to control third-party testing equipment to assist in completing the test.

2. The distributed electric drive EOL test system according to claim 1, characterized in that: It includes two sets of dynamometers and torque meters, wherein the output shaft of one set of dynamometers is connected to the left half output shaft of the electric drive assembly through the torque meter, and the output shaft of the other set of dynamometers is connected to the right half output shaft of the electric drive assembly through the torque meter.

3. The distributed electric drive EOL test system according to claim 1, characterized in that: The third-party testing equipment includes: power analyzer, vibration and noise testing equipment, and oil cooling testing equipment.

4. The distributed electric drive EOL test system according to claim 1, characterized in that: During the EOL test of the electric drive assembly, the first host computer is further used to perform closed-loop control on the electric drive assembly based on the test data fed back in real time by the dynamometer and the torque meter.

5. A test method based on a distributed electric drive EOL test system, characterized in that: The first host computer used in the distributed electric drive EOL test system includes: Obtaining an instruction regarding an electric drive EOL test transmitted by a second host computer in the distributed electric drive EOL test system; Based on the instruction, respond to the test items arranged by the second host computer, and control the electric drive assembly to be tested and the dynamometer to operate accurately and collaboratively according to the preset test conditions to perform the corresponding test.

6. The test method based on the distributed electric drive EOL test system according to claim 5, characterized in that: The steps of responding to the test items arranged by the second host computer based on the instruction and controlling the electric drive assembly to be tested and the dynamometer to accurately coordinate and operate according to the preset test conditions to perform the corresponding test include: For each test, the stored test data is transmitted to the second host computer after the test is completed.

7. The test method based on the distributed electric drive EOL test system according to claim 6, characterized in that: Based on the instruction, responding to the test items arranged by the second host computer, and controlling the electric drive assembly to be tested and the dynamometer to accurately coordinate and operate according to the preset test conditions to perform the corresponding test also includes the following steps: When any test fails, the second host computer is notified.

8. A test method based on a distributed electric drive EOL test system, characterized in that: The second host computer used in the distributed electric drive EOL test system includes: Responding to the electric drive EOL test triggered by the user and generating an instruction to be transmitted to the first host computer in the distributed electric drive EOL test system; Notify the first host computer to execute the corresponding test items in sequence according to the test logic sequence preset for the electric drive EOL test, and control the third-party test equipment to assist in completing the test; After the electric drive EOL test is completed, the corresponding test report is generated and uploaded based on the stored test data.

9. The test method based on the distributed electric drive EOL test system according to claim 8, characterized in that: The preset test logic sequence of the electric drive EOL test includes a wake-up test, a self-learning test, an efficiency test, a vibration and noise test, and an oil pump test. The first host computer is notified to execute the corresponding test items in sequence according to the preset test logic sequence of the electric drive EOL test, and the three-party test equipment is controlled to assist in completing the test, including: Notify the first host computer to execute the corresponding test items in the test logic order of wake-up test, self-learning test, efficiency test, and vibration and noise test, and control the three-party test equipment to assist in completing the test; After the vibration and noise test is completed, control the third-party testing equipment to perform the oil pump test.

10. The test method based on the distributed electric drive EOL test system according to claim 8, characterized in that: Also includes: When any test fails, the electric drive EOL test is stopped, and the corresponding test report is generated and uploaded based on the stored test data.

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