Simulation test method, device and platform for water channel of electric drive system and storage medium

Abstract

The invention discloses a simulation test method, device and platform for an electric drive system water channel and a storage medium, and the method comprises the steps: applying at least two simulation test stresses to a to-be-tested electric drive system water channel, the simulation test stresses comprising active pressure excitation, real vehicle vibration simulation and temperature cycle stress; acquiring multi-dimensional detection data of the to-be-tested water channel of the electric drive system under the at least two simulation test stresses; and according to the multi-dimensional detection data, the simulation performance test of the water channel of the electric drive system is realized. Therefore, the real stress condition of the vehicle under the complex working condition is simulated by adopting a multi-stress cooperative application mechanism, so that the test period is greatly shortened, meanwhile, the state of the water channel of the electric system is monitored in real time through multi-dimensional detection data, and the real-time state of the water channel of the electric system is efficiently and accurately evaluated, so that the test efficiency is improved. And comprehensive evaluation of the reliability of the water channel of the electric drive system is realized.

Description

Technical Field

[0001] This invention relates to the field of electric drive system waterway simulation testing technology, and in particular to a simulation testing method for electric drive system waterways, a computer-readable storage medium, a simulation testing device for electric drive system waterways, and a simulation testing platform for electric drive system waterways. Background Technology

[0002] In the field of new energy vehicles, the reliability of the cooling channels of the electric drive system is crucial for the stable operation of the vehicle. Currently, testing technologies for the reliability of electric drive system cooling channels are mainly divided into two categories: laboratory bench testing and whole vehicle testing, but both have significant shortcomings.

[0003] On the one hand, in laboratory bench testing, the commonly used method is to conduct static pressure or pulse pressure tests on the cooling system assembly. This method can only assess the cooling system's ability to withstand pressure in a relatively simple and stable environment. On the other hand, traditional road testing mainly relies on long-term road driving, waiting for the fault to occur naturally. Moreover, this method is extremely inefficient and makes it difficult to conduct precise monitoring and accelerated aging tests on the internal condition of the cooling system. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, the first objective of this invention is to propose a simulation testing method for the water channels of an electric drive system. This method can simulate the real stress conditions of a vehicle under complex operating conditions by employing a multi-stress collaborative application mechanism, thereby greatly shortening the testing cycle. Simultaneously, by monitoring the real-time status of the electric drive system water channels from multi-dimensional detection data, it can efficiently and accurately assess the real-time status of the electric drive system water channels, thus achieving a comprehensive evaluation of the reliability of the electric drive system water channels.

[0005] A second objective of this invention is to provide a computer-readable storage medium.

[0006] The third objective of this invention is to provide a simulation testing device for an electric drive system waterway.

[0007] The fourth objective of this invention is to provide a simulation test platform for an electric drive system waterway.

[0008] To achieve the above objectives, the simulation testing method for the water channel of an electric drive system proposed in the first aspect of the present invention includes: applying at least two simulation test stresses to the water channel of the electric drive system under test, wherein the simulation test stresses include active pressure excitation, actual vehicle vibration simulation, and temperature cycling stress; acquiring multi-dimensional detection data of the water channel of the electric drive system under test under the at least two simulation test stresses; and performing simulation performance testing of the water channel of the electric drive system based on the multi-dimensional detection data.

[0009] According to an embodiment of the present invention, a simulation testing method for the water channel of an electric drive system applies at least two types of simulated test stresses to the water channel of the electric drive system under test. These simulated test stresses include active pressure excitation, real vehicle vibration simulation, and temperature cycling stress. Then, multi-dimensional detection data of the water channel under test is obtained under at least two types of simulated test stresses. Based on the multi-dimensional detection data, the simulation performance of the water channel is tested. Therefore, by employing a multi-stress collaborative application mechanism, the actual stress conditions of a vehicle under complex operating conditions are simulated, greatly shortening the testing cycle. Simultaneously, by monitoring the state of the electric drive system water channel in real time from multi-dimensional detection data, the real-time state of the electric drive system water channel is efficiently and accurately evaluated, thereby achieving a comprehensive assessment of the reliability of the electric drive system water channel.

[0010] In addition, the simulation test method for the waterway of the electric drive system according to the above embodiments of the present invention may also have the following additional technical features: According to one embodiment of the present invention, the multi-dimensional detection data includes: pressure detection data, flow detection data, tracer gas detection data, and temperature detection data.

[0011] According to one embodiment of the present invention, applying at least two simulated test stresses to the water channel of the electric drive system under test includes: connecting a hydraulic pulse generation system in parallel to the water channel of the electric drive system via a quick-connect interface, and adjusting the pulse parameters according to the PWM signal to superimpose the active pressure excitation on the original pressure of the water channel of the electric drive system; controlling the vehicle containing the water channel of the electric drive system under test to run at a preset speed in a real vehicle vibration simulation device to achieve the real vehicle vibration simulation, wherein the real vehicle vibration simulation device includes a tortuous road simulation section, a resonant slab road simulation section, and a cobblestone road simulation section; and controlling the vehicle containing the water channel of the electric drive system under test to perform a rapid acceleration / deceleration operation to generate the temperature cycle stress in the water channel of the electric drive system.

[0012] According to one embodiment of the present invention, the step of performing a simulation performance test on the water channel of the electric drive system based on the multi-dimensional detection data includes: performing a sealing test on the water channel of the electric drive system in the simulation performance test based on the pressure detection data and the tracer gas detection data.

[0013] According to one embodiment of the present invention, the step of performing a simulation performance test on the water channel of the electric drive system based on the multi-dimensional detection data includes: performing a coolant flow test on the water channel of the electric drive system in the simulation performance test based on the flow detection data.

[0014] According to one embodiment of the present invention, the step of performing a simulation performance test on the water channel of the electric drive system based on the multi-dimensional detection data includes: performing a cooling performance attenuation test on the water channel of the electric drive system based on the temperature detection data.

[0015] According to one embodiment of the present invention, the method further includes: storing the multi-dimensional detection data at a preset sampling frequency, and generating a dynamic curve of the test process based on the multi-dimensional detection data.

[0016] To achieve the above objectives, a computer-readable storage medium is provided in the second aspect of the present invention, which stores a simulation test program for an electric drive system waterway. When the simulation test program for the electric drive system waterway is executed by a processor, it implements the simulation test method for the electric drive system waterway of the present invention described above.

[0017] According to embodiments of the present invention, a computer-readable storage medium can execute a simulation test program for an electric drive system waterway stored thereon. By employing a multi-stress collaborative application mechanism, it can simulate the actual stress conditions of a vehicle under complex working conditions, thereby greatly shortening the test cycle. At the same time, by monitoring the electric drive system waterway status in real time from multi-dimensional detection data, it can efficiently and accurately evaluate the real-time status of the electric drive system waterway, thereby achieving a comprehensive evaluation of the reliability of the electric drive system waterway.

[0018] To achieve the above objectives, the simulation testing device for the water channel of an electric drive system proposed in the third aspect embodiment of the present invention includes: a simulation module for applying at least two simulation test stresses to the water channel of the electric drive system under test, wherein the simulation test stresses include active pressure excitation, actual vehicle vibration simulation, and temperature cycling stress; an acquisition module for acquiring multi-dimensional detection data of the water channel of the electric drive system under test under the at least two simulation test stresses; and a testing module for performing simulation performance testing of the water channel of the electric drive system based on the multi-dimensional detection data.

[0019] The simulation testing device for the electric drive system water channel according to an embodiment of the present invention applies at least two simulated test stresses to the electric drive system water channel under test through a simulation module. These simulated test stresses include active pressure excitation, real vehicle vibration simulation, and temperature cycling stress. Then, an acquisition module acquires multi-dimensional detection data of the electric drive system water channel under test under at least two simulated test stresses. Finally, a testing module performs simulation performance testing of the electric drive system water channel based on the multi-dimensional detection data. Therefore, by employing a multi-stress collaborative application mechanism, the device simulates the real-world stress conditions of a vehicle under complex operating conditions, significantly shortening the testing cycle. Simultaneously, by monitoring the electric drive system water channel status in real time from multi-dimensional detection data, the device efficiently and accurately assesses the real-time status of the electric drive system water channel, thereby achieving a comprehensive evaluation of the reliability of the electric drive system water channel.

[0020] To achieve the above objectives, the simulation test platform for the electric drive system waterway proposed in the fourth aspect embodiment of the present invention includes the simulation test device for the electric drive system waterway as described in the above embodiment of the present invention.

[0021] According to the embodiment of the present invention, the simulation test platform for the electric drive system waterway, using the aforementioned simulation test device for the electric drive system waterway, can simulate the real stress conditions of the vehicle under complex working conditions by adopting a multi-stress collaborative application mechanism, thereby greatly shortening the test cycle. At the same time, by monitoring the electric system waterway status in real time from multi-dimensional detection data, the real-time status of the electric drive system waterway can be evaluated efficiently and accurately, thereby achieving a comprehensive evaluation of the reliability of the electric drive system waterway.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] Figure 1 This is a flowchart illustrating a simulation test method for an electric drive system waterway according to an embodiment of the present invention. Figure 2 This is a schematic diagram illustrating the principle of a simulation test method for an electric drive system waterway according to an embodiment of the present invention; Figure 3 This is a block diagram of a simulation test device for an electric drive system waterway according to an embodiment of the present invention; Figure 4 This is a block diagram of a simulation test platform for an electric drive system waterway according to an embodiment of the present invention. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] The following description, with reference to the accompanying drawings, describes a simulation testing method, a computer-readable storage medium, a simulation testing device, and a simulation testing platform for an electric drive system waterway according to embodiments of the present invention.

[0026] Figure 1 This is a flowchart illustrating a simulation test method for an electric drive system waterway according to an embodiment of the present invention.

[0027] Specifically, in some embodiments of the present invention, such as Figure 1 As shown, the simulation test method for the waterway of the electric drive system includes: S101, apply at least two types of simulated test stresses to the water channel of the electric drive system under test. The simulated test stresses include active pressure excitation, actual vehicle vibration simulation and temperature cycling stress.

[0028] It should be understood that, since existing technologies can only simulate one type of stress, such as pressure, temperature, or vibration, they cannot reproduce the complex working conditions of "vibration," "pressure pulse," and "temperature cycle" coupled in a real vehicle. This makes it difficult to expose a large number of potential faults (such as joint loosening caused by vibration and aging of seals under the combined effects of temperature and pressure). Therefore, in this embodiment of the present invention, at least two simulated test stresses are applied to the water channel of the electric drive system under test (e.g., simultaneously applying active pressure excitation and real vehicle vibration simulation, simultaneously applying active pressure excitation and temperature cycle stress, simultaneously applying active pressure excitation, real vehicle vibration simulation, and temperature cycle stress, etc.) to accurately reproduce the comprehensive load of the vehicle under test in the real use environment.

[0029] S102, acquire multi-dimensional test data of the waterway of the electric drive system under test under at least two simulated test stresses.

[0030] It should be understood that, since existing technologies only focus on "sealing reliability" and ignore the cooling efficiency reduction caused by scaling and air blockage during long-term use of the water channel (the main cause of overheating failure in electric drive systems), this embodiment of the present invention uses multi-dimensional detection data of the water channel of the electric drive system under test under at least two simulated test stresses in real time to help to simultaneously evaluate the dynamic changes in cooling performance and achieve integrated testing of sealing reliability and cooling efficiency.

[0031] Optionally, in some embodiments of the present invention, the multi-dimensional detection data includes: pressure detection data, flow detection data, tracer gas detection data, and temperature detection data.

[0032] Specifically, in this embodiment of the invention, based on such Figure 2 The sensor layout shown in Table 1 below enables the acquisition of multi-dimensional detection data: Table 1

[0033] S103, based on multi-dimensional detection data, enables simulation performance testing of the waterway of the electric drive system.

[0034] It is understood that, in this embodiment of the present invention, based on the multi-dimensional detection data shown in Table 1 above, simulation performance tests, including but not limited to sealing tests, coolant flow tests, and cooling performance degradation tests, can be performed on the water channels of the electric drive system. This enables a comprehensive assessment of the reliability of the electric drive system's water channels.

[0035] Furthermore, in some embodiments of the present invention, at least two simulated test stresses are applied to the water channel of the electric drive system under test, including: The hydraulic pulse generation system is connected in parallel to the water channel of the electric drive system via a quick-connect interface, and the pulse parameters are adjusted according to the PWM signal to superimpose active pressure excitation on the original pressure of the water channel of the electric drive system.

[0036] It is understood that, in this embodiment of the invention, active pressure excitation is applied to the water channel of the electric drive system under test in the following manner: like Figure 2 As shown, by connecting the hydraulic pulse generation system (including a high-pressure pump, pulse controller, and flow regulating valve) in parallel to the electric drive system water channel (the vehicle's original cooling circulation pipeline, such as the main circuit between the water pump outlet and the motor inlet) via a quick-connect interface, the hydraulic pulse generation system receives the PWM (Pulse Width Modulation) signal from the control system and adjusts the pulse parameters (amplitude range 0.5-3 bar, frequency 0.1-5 Hz, waveform selectable sine wave / square wave) according to the test requirements. This allows for the superposition of active pressure excitation on the original pressure base (usually 0.8-1.2 bar) of the electric drive system water channel, thereby simulating pressure shocks under extreme conditions (such as the sudden increase in water pump speed during rapid acceleration, the instantaneous pressure generated by coolant expansion during low-temperature start-up, etc.).

[0037] It should be noted that in the above embodiments of the present invention, the hydraulic pulse generation system adopts a parallel connection design, which can maintain the basic structure of the original vehicle cooling circuit without changing it, and the pulse parameters can be dynamically adjusted in real time to adapt to the cooling system characteristics of different vehicle types (A-class cars, SUVs, commercial vehicles).

[0038] The vehicle containing the waterway of the electric drive system under test is controlled to run at a preset speed in a real vehicle vibration simulation device to achieve real vehicle vibration simulation. The real vehicle vibration simulation device includes a tortuous road simulation section, a resonant plate road simulation section, and a cobblestone road simulation section.

[0039] It is understood that, in this embodiment of the present invention, actual vehicle vibration simulation is applied to the water channel of the electric drive system under test in the following manner: The vehicle, which includes the water channel of the electric drive system under test, is controlled to run at a preset speed (20-40km / h) in a real vehicle vibration simulation device. Through the contact between the tires and the real vehicle vibration simulation device, mechanical vibration is transmitted to the electric drive system and cooling water channel, thereby realizing "vibration loading under real installation conditions".

[0040] The vehicle vibration simulation device employs a multi-segment combination structure with a total length of 50-100m. The simulated tortuous road segment consists of staggered concrete protrusions, 5-8cm high and 10-15cm apart, generating lateral tortuous vibrations when a vehicle travels, simulating tortuous road conditions. The simulated resonant plate road segment features adjustable frequency steel vibrating plates (resonance frequency 10-20Hz), which generate periodic vibrations via a motor, precisely mimicking the resonance risk of the electric drive system. The simulated cobblestone road segment incorporates randomly distributed natural stones with a diameter of 8-12cm, generating irregular high-frequency vibrations to simulate cobblestone road conditions.

[0041] The vehicle containing the water channel of the electric drive system under test is controlled to perform rapid acceleration / deceleration operations, so as to generate temperature cycling stress in the water channel of the electric drive system.

[0042] It is understood that, in this embodiment of the invention, temperature cycling stress is applied to the water channel of the electric drive system under test in the following manner: By controlling a vehicle containing the waterway of the electric drive system under test to perform rapid acceleration / deceleration operations, the power of the electric drive system is rapidly switched between 0-100% to generate temperature cycle stress of -40℃ to 120℃, thereby accelerating the exposure of material compatibility issues.

[0043] Specifically, in some embodiments of the present invention, by simultaneously applying active pressure excitation, real-vehicle vibration simulation, and temperature cycling stress to the vehicle under test, a coupled reinforcement effect is achieved: the micro-displacement of the joint caused by vibration is superimposed with the pressure pulse, amplifying the leakage risk by more than 10 times. At the same time, temperature cycling exacerbates the thermal expansion and contraction of the seals, further accelerating failure. As a result, the testing cycle is shortened from "several months" of traditional road testing to "3-7 days," achieving an accelerated effect of "simulating several years of use in a few days."

[0044] Furthermore, in some embodiments of the present invention, the simulation performance test of the electric drive system waterway is realized based on multi-dimensional detection data, including: performing a sealing test on the electric drive system waterway in the simulation performance test based on pressure detection data and tracer gas detection data.

[0045] It is understood that in this embodiment of the present invention, the pressure status of the electric drive system's water channel is monitored in real time using pressure detection data. When a sudden drop in pressure occurs in the electric drive system's water channel, the leak point is accurately identified and located by combining tracer gas detection data, and a leak alarm is triggered. This achieves the sealing test in the simulation performance testing of the electric drive system's water channel.

[0046] The leak detection process, specifically the injection stage, involves mixing helium and coolant at a volume ratio of 1:1000, and then... Figure 2The tracer gas control valve shown is injected into the cooling system and left to stand for 30 minutes to ensure uniform distribution; Detection process: The gas around the electric drive system is collected in real time by the detection probe, the helium concentration is analyzed by the mass spectrometer, and when the helium concentration is greater than the preset concentration threshold, the leak point coordinates are located by the detection probe (error ≤ 5cm).

[0047] It should be noted that, in the above embodiments of the present invention, the leakage detection time can be advanced from the time the coolant seeps out to the initial stage of the leakage, so as to achieve very early and accurate detection and location of the leakage, avoid the leakage from expanding and causing serious damage to the electric drive system, and the leakage point can be accurately located without disassembling the electric drive system, which greatly improves maintenance efficiency.

[0048] Furthermore, in some embodiments of the present invention, the simulation performance test of the electric drive system water channel is realized based on multi-dimensional detection data, including: coolant flow test in the simulation performance test of the electric drive system water channel based on flow detection data.

[0049] It is understood that in this embodiment of the present invention, the coolant circulation volume is monitored in real time using flow detection data, and a blockage alarm is triggered when scale buildup in the water channels causes a reduction in pipe diameter by a preset percentage threshold (e.g., 10%), resulting in a decrease in flow in the electric drive system's water channels. This enables coolant flow testing in the simulation performance testing of the electric drive system's water channels.

[0050] Furthermore, in some embodiments of the present invention, the simulation performance test of the water channel of the electric drive system is realized based on multi-dimensional detection data, including: testing the degree of cooling performance degradation in the simulation performance test of the water channel of the electric drive system based on temperature detection data.

[0051] It is understood that in this embodiment of the present invention, the temperature difference between the inlet and outlet water and the heat exchange efficiency (heat exchange efficiency = (outlet water temperature - inlet water temperature) * flow rate * specific heat capacity of coolant / power of electric drive system) are calculated using temperature detection data to quantify the degree of cooling performance degradation. This enables the testing of the degree of cooling performance degradation in the simulation performance test of the electric drive system's water channels.

[0052] Specifically, in some embodiments of the present invention, by simultaneously acquiring sealing test indicators (pressure detection data, tracer gas detection data), coolant flow test indicators (flow rate detection data), and cooling performance degradation test indicators (temperature detection data), the overall reliability of the electric drive system water channel is comprehensively evaluated based on multi-dimensional detection data. Thus, not only can sealing reliability data be obtained, but cooling performance degradation can also be quantified through changes in flow rate and temperature, allowing for the early detection of hidden problems such as air blockage and scaling, thereby achieving a comprehensive evaluation of the overall reliability of the electric drive system water channel.

[0053] Furthermore, in some embodiments of the present invention, the method further includes: storing multi-dimensional detection data at a preset sampling frequency, and generating a dynamic curve of the test process based on the multi-dimensional detection data.

[0054] It is understood that in this embodiment of the present invention, multi-dimensional detection data (pressure, flow rate, and temperature data, etc.) are stored at a preset sampling frequency (e.g., 100Hz), and dynamic curves of the test process are generated based on the multi-dimensional detection data, so that testers can more intuitively understand the test results of the electric drive system waterway.

[0055] Specifically, the simulation testing method for the waterway of the electric drive system based on the embodiments of the present invention has the following advantages compared with the simulation testing methods of the prior art: 1) All tests were conducted in the actual vehicle condition, and the installation method of the cooling water channel (bolt tightening torque, pipe routing, etc.) was completely consistent with the original vehicle to avoid errors caused by bench installation.

[0056] 2) The hydraulic pulse generation system is connected in parallel to the original vehicle circuit without changing the flow characteristics of the coolant (such as flow rate, turbulence state, etc.).

[0057] 3) The vibration stress is applied through the actual vehicle vibration simulation device to realize the real transmission path of the tire-suspension-body, which is consistent with the vibration response during actual driving.

[0058] As a result, the test results are more than 90% consistent with the actual vehicle usage, which is much higher than bench testing (consistency of about 60%). This provides more reliable data for product improvement and can also reveal problems that cannot be exposed in bench testing (such as pipe fatigue fracture caused by body resonance).

[0059] It should be noted that in some embodiments of the present invention, such as Figure 2 As shown, the control system can also interact with the cloud platform to upload multi-dimensional detection data to the cloud platform for subsequent test reconstruction and test analysis.

[0060] In summary, the simulation testing method for the electric drive system water channel according to embodiments of the present invention applies at least two types of simulated test stresses to the water channel of the electric drive system under test. These simulated test stresses include active pressure excitation, real vehicle vibration simulation, and temperature cycling stress. Furthermore, multi-dimensional detection data of the water channel under test is obtained under at least two types of simulated test stresses. Based on this multi-dimensional detection data, the simulation performance of the electric drive system water channel is tested. Therefore, by employing a multi-stress collaborative application mechanism, the actual stress conditions of the vehicle under complex operating conditions are simulated, greatly shortening the testing cycle. Simultaneously, by monitoring the state of the electric drive system water channel in real time from multi-dimensional detection data, the real-time state of the electric drive system water channel is efficiently and accurately evaluated, thereby achieving a comprehensive assessment of the reliability of the electric drive system water channel.

[0061] Based on the simulation test method for the electric drive system waterway of the foregoing embodiments of the present invention, the present invention also proposes a computer-readable storage medium storing a simulation test program for the electric drive system waterway thereon. When the simulation test program for the electric drive system waterway is executed by a processor, it implements the simulation test method for the electric drive system waterway of the foregoing embodiments of the present invention.

[0062] It should be understood that the specific implementation of the computer-readable storage medium in the embodiments of the present invention can be found in the specific implementation of the simulation test method of the electric drive system waterway in the foregoing embodiments of the present invention. To reduce redundancy, it will not be described again here.

[0063] In summary, the computer-readable storage medium according to embodiments of the present invention, by executing the simulation test program of the electric drive system water channel stored thereon, can simulate the real stress conditions of the vehicle under complex working conditions by adopting a multi-stress collaborative application mechanism, thereby greatly shortening the test cycle. At the same time, by monitoring the electric system water channel status in real time from multi-dimensional detection data, the real-time status of the electric drive system water channel can be evaluated efficiently and accurately, thereby achieving a comprehensive evaluation of the reliability of the electric drive system water channel.

[0064] Figure 3 This is a block diagram of a simulation test device for an electric drive system waterway according to an embodiment of the present invention.

[0065] Specifically, in some embodiments of the present invention, such as Figure 3 As shown, the simulation test device 100 for the electric drive system waterway includes: a simulation module 10, an acquisition module 20, and a test module 30.

[0066] The simulation module 10 is used to apply at least two types of simulated test stresses to the water channel of the electric drive system under test. The simulated test stresses include active pressure excitation, actual vehicle vibration simulation and temperature cycle stress. The acquisition module 20 is used to acquire multi-dimensional detection data of the water channel of the electric drive system under test under at least two types of simulated test stresses. The test module 30 is used to perform simulated performance testing of the water channel of the electric drive system based on the multi-dimensional detection data.

[0067] Furthermore, in some embodiments of the present invention, the multi-dimensional detection data includes: pressure detection data, flow rate detection data, tracer gas detection data, and temperature detection data.

[0068] Furthermore, in some embodiments of the present invention, the simulation module 10 is also used to: connect the hydraulic pulse generation system in parallel to the electric drive system water channel via a quick-connect interface, and adjust the pulse parameters according to the PWM signal to superimpose active pressure excitation on the original pressure of the electric drive system water channel; control the vehicle containing the electric drive system water channel to be tested to run at a preset speed in the real vehicle vibration simulation device to achieve real vehicle vibration simulation, wherein the real vehicle vibration simulation device includes a tortuous road simulation section, a resonant plate road simulation section, and a cobblestone road simulation section; and control the vehicle containing the electric drive system water channel to be tested to perform rapid acceleration / deceleration operations to generate temperature cyclic stress in the electric drive system water channel.

[0069] Furthermore, in some embodiments of the present invention, the test module 30 is also used to perform a sealing test on the waterway of the electric drive system in a simulation performance test based on pressure detection data and tracer gas detection data.

[0070] Furthermore, in some embodiments of the present invention, the test module 30 is also used to perform a coolant flow test in a simulation performance test of the electric drive system waterway based on flow detection data.

[0071] Furthermore, in some embodiments of the present invention, the test module 30 is also used to test the degree of cooling performance degradation in the simulation performance test of the electric drive system water channel based on temperature detection data.

[0072] Furthermore, in some embodiments of the present invention, the test module 30 is also used to store multi-dimensional detection data at a preset sampling frequency and generate a dynamic curve of the test process based on the multi-dimensional detection data.

[0073] It should be understood that the specific implementation of the simulation test device 100 for the electric drive system waterway in this embodiment of the invention corresponds one-to-one with the specific implementation of the simulation test method for the electric drive system waterway in the aforementioned embodiment of the invention. To reduce redundancy, it will not be described again here.

[0074] In summary, the simulation testing device for the electric drive system water channel according to embodiments of the present invention applies at least two simulated test stresses to the electric drive system water channel under test through a simulation module. These simulated test stresses include active pressure excitation, real vehicle vibration simulation, and temperature cycling stress. Furthermore, an acquisition module acquires multi-dimensional detection data of the electric drive system water channel under test under at least two simulated test stresses. Finally, a testing module performs simulation performance testing of the electric drive system water channel based on the multi-dimensional detection data. Therefore, by employing a multi-stress collaborative application mechanism, the device simulates the actual stress conditions of a vehicle under complex operating conditions, significantly shortening the testing cycle. Simultaneously, by monitoring the electric drive system water channel status in real time from multi-dimensional detection data, the device efficiently and accurately assesses the real-time status of the electric drive system water channel, thereby achieving a comprehensive evaluation of the reliability of the electric drive system water channel.

[0075] Figure 4 This is a block diagram of a simulation test platform for an electric drive system waterway according to an embodiment of the present invention.

[0076] Specifically, in some embodiments of the present invention, such as Figure 4 As shown, the simulation test platform 1000 for electric drive system waterways includes the simulation test device 100 for electric drive system waterways described in the above embodiment of the present invention.

[0077] It should be understood that the specific implementation of the simulation test platform 1000 for the electric drive system waterway in the embodiments of the present invention can refer to the specific implementation of the simulation test method for the electric drive system waterway in the foregoing embodiments of the present invention. To reduce redundancy, it will not be described again here.

[0078] In summary, the simulation test platform for the electric drive system waterway according to the embodiments of the present invention, using the aforementioned simulation test device for the electric drive system waterway, can simulate the real stress conditions of a vehicle under complex working conditions by adopting a multi-stress collaborative application mechanism, thereby greatly shortening the test cycle. At the same time, by monitoring the electric drive system waterway status in real time from multi-dimensional detection data, the real-time status of the electric drive system waterway can be evaluated efficiently and accurately, thereby achieving a comprehensive evaluation of the reliability of the electric drive system waterway.

[0079] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0080] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0081] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0083] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0084] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0085] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0086] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A simulation test method for a waterway in an electrically driven system, characterized in that, The method includes: At least two types of simulated test stresses are applied to the water channel of the electric drive system under test, including active pressure excitation, real vehicle vibration simulation and temperature cycling stress. Acquire multi-dimensional detection data of the waterway of the electric drive system under test under at least two simulated test stresses; Based on the multi-dimensional detection data, the simulation performance test of the waterway of the electric drive system is realized.

2. The simulation test method for the waterway of the electric drive system according to claim 1, characterized in that, The multi-dimensional detection data includes: pressure detection data, flow detection data, tracer gas detection data, and temperature detection data.

3. The simulation test method for the waterway of the electric drive system according to claim 2, characterized in that, The waterway of the electric drive system under test is subjected to at least two types of simulated test stresses, including: The hydraulic pulse generation system is connected in parallel to the water channel of the electric drive system via a quick-connect interface, and the pulse parameters are adjusted according to the PWM signal to superimpose the active pressure excitation on the original pressure of the water channel of the electric drive system. The vehicle containing the waterway of the electric drive system under test is controlled to run at a preset speed in a real vehicle vibration simulation device to achieve the real vehicle vibration simulation. The real vehicle vibration simulation device includes a tortuous road simulation section, a resonant slab road simulation section, and a cobblestone road simulation section. The vehicle containing the water channel of the electric drive system under test is controlled to perform a rapid acceleration / deceleration operation to generate the temperature cycle stress in the water channel of the electric drive system.

4. The simulation test method for the waterway of the electric drive system according to claim 2, characterized in that, The step of performing simulation performance testing on the waterway of the electric drive system based on the multi-dimensional detection data includes: Based on the pressure detection data and the tracer gas detection data, the waterway of the electric drive system is subjected to a sealing test in the simulation performance test.

5. The simulation test method for the waterway of the electric drive system according to claim 2, characterized in that, The step of performing simulation performance testing on the waterway of the electric drive system based on the multi-dimensional detection data includes: Based on the flow detection data, the coolant flow test is performed on the water channel of the electric drive system as part of the simulation performance test.

6. The simulation test method for the waterway of the electric drive system according to claim 2, characterized in that, The step of performing simulation performance testing on the waterway of the electric drive system based on the multi-dimensional detection data includes: Based on the temperature detection data, the cooling performance degradation degree of the electric drive system water channel is tested in the simulation performance test.

7. The simulation test method for the waterway of the electric drive system according to claim 2, characterized in that, The method further includes: The multi-dimensional detection data is stored at a preset sampling frequency, and a dynamic curve of the testing process is generated based on the multi-dimensional detection data.

8. A computer-readable storage medium, characterized in that, It stores a simulation test program for an electric drive system waterway, which, when executed by a processor, implements the simulation test method for an electric drive system waterway as described in any one of claims 1-7.

9. A simulation testing device for an electrically driven waterway system, characterized in that, The device includes: The simulation module is used to apply at least two types of simulated test stresses to the water channel of the electric drive system under test, including active pressure excitation, real vehicle vibration simulation and temperature cycling stress. The acquisition module is used to acquire multi-dimensional detection data of the water channel of the electric drive system under test under at least two simulated test stresses; The testing module is used to perform simulation performance testing on the waterway of the electric drive system based on the multi-dimensional detection data.

10. A simulation test platform for an electrically driven waterway system, characterized in that, The platform includes a simulation testing device for an electric drive system waterway as described in claim 9.

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