Test method of test bench and test bench

Abstract

The invention relates to the technical field of testing, and discloses a testing method of a testing rack and the testing rack, and the testing method is applied to the testing rack and comprises the steps that when the testing rack is in a preset working state, a water pump is controlled to work at different preset powers; obtaining the current noise and the current heat dissipation flow of the test bench and the current energy consumption of the test bench when the water pump works at different preset powers; wherein the current heat dissipation flow is the flow of the cooling liquid flowing through the radiator; target power is determined from preset power according to the current noise, the current heat dissipation flow and the current energy consumption, so that the current noise and the current heat dissipation flow corresponding to the target power meet the target noise and the target heat dissipation flow respectively, and the corresponding current energy consumption is the lowest. Therefore, the target power for balancing noise, heat dissipation flow and energy consumption can be tested when the test bench is in the preset working state, and then theoretical data support is provided for performance optimization in the actual application process of the thermal management system.

Description

Technical Field

[0001] This application relates to the field of testing technology, specifically to a testing method and a testing bench. Background Technology

[0002] Range-extended electric vehicles (REEVs) or plug-in hybrid electric vehicles have two power systems. Compared to pure electric vehicles and traditional gasoline vehicles, their thermal management system components and cooling pipes are significantly more complex. With limited engine compartment volume, the space between components is significantly reduced. Especially in recent years, vehicle designs have continuously compressed engine compartment volume to further increase passenger compartment space, making the already compact engine compartment increasingly cramped, and making it difficult to place test equipment within it.

[0003] To accurately test certain indicators of a vehicle's thermal management system, it is necessary to build an additional test bench for the thermal management system to simulate and test it during the data design phase, thereby optimizing the thermal management system. However, the testing process on the test bench does not involve testing related parameters such as balancing system noise and heat dissipation flow, resulting in a lack of relevant theoretical data for optimizing the application of the thermal management system. Summary of the Invention

[0004] In view of the above problems, this application provides a test method and a test bench, which can test the target power of the test bench in a preset working state, balancing noise, heat dissipation flow and energy consumption, thereby providing theoretical data support for performance optimization in the actual application of thermal management systems.

[0005] The first aspect of this application provides a testing method for a test bench. The testing method is applied to the test bench, which is used to simulate the thermal management system of a vehicle. The method includes: when the test bench is in a preset working state, controlling a water pump to operate at different preset powers; acquiring the current noise and current heat dissipation flow rate of the test bench, as well as the current energy consumption of the test bench when the water pump operates at different preset powers; wherein, the current heat dissipation flow rate is the flow rate of coolant flowing through the radiator; determining a target power from the preset powers based on the current noise, current heat dissipation flow rate, and current energy consumption, such that the current noise and current heat dissipation flow rate corresponding to the target power respectively meet the target noise and target heat dissipation flow rate, and the corresponding current energy consumption is minimized.

[0006] In some specific embodiments, the step of determining the target power from the preset power based on the current noise, the current heat dissipation flow rate, and the current energy consumption includes: determining a first target power range from the preset power based on the current noise and the target noise, and determining a second target power range from the preset power based on the current heat dissipation flow rate and the target heat dissipation flow rate; taking the intersection of the first target power range and the second target power range as the target power range, and taking the power with the lowest current energy consumption in the target power range as the target power.

[0007] In some specific embodiments, the step of obtaining the current noise of the test bench when the water pump operates at different preset power includes: obtaining a first current noise of the water pump and a second current noise of the pipeline of the test bench when the water pump operates at different preset power; the step of determining a first target power range from the preset power based on the current noise and the target noise includes: determining the first target power range from the preset power based on the first target noise and the second target noise corresponding to the first current noise and the second current noise, respectively; wherein the target noise includes the first target noise and the second target noise.

[0008] In some specific embodiments, the method further includes: obtaining the current vibration level of the water pump when the water pump operates at different preset power; determining a target power from the preset power based on the current noise, current heat dissipation flow rate and current energy consumption, so that the current noise and current heat dissipation flow rate corresponding to the target power meet the target noise and target heat dissipation flow rate respectively, and the corresponding current energy consumption is minimized, including: determining the target power from the preset power based on the current vibration level, current noise, current heat dissipation flow rate and current energy consumption, so that the current vibration level, current noise and current heat dissipation flow rate corresponding to the target power meet the target vibration level, target noise and target heat dissipation flow rate respectively, and the corresponding current energy consumption is minimized.

[0009] In some specific embodiments, before the step of controlling the water pump to operate at different preset power when the test bench is in a preset working state, the method includes: when the test bench is in a preset working state, acquiring the flow rate of each pipeline of the test bench; if the flow rate of any pipeline is outside the target flow rate range, adjusting the resistance parameter of the resistance element in the pipeline of the test bench to make the flow rate within the target flow rate range, and acquiring the resistance parameter of each resistance element.

[0010] In some specific embodiments, if the flow rate of any pipeline is outside the target flow rate range, the resistance parameters of the resistance elements in the test bench pipeline are adjusted to bring the pipeline flow rate within the target flow rate range. After obtaining the resistance parameters of each resistance element, the process includes: adding coolant to the test bench and obtaining the bubble positions of the bubbles formed in the pipeline during the adding process; adjusting the pipeline layout based on the bubble positions to eliminate the bubbles, thereby determining the target pipeline layout.

[0011] In some specific embodiments, the method further includes: when the test bench is in a preset working state, adjusting the resistance parameter of the resistance element of the test bench, and obtaining the flow rate and total resistance value of the pipeline of the test bench; establishing the correspondence between the resistance change, flow rate change and total resistance value during the adjustment process of the test bench, and adjusting the resistance parameter of the resistance element according to the correspondence so that the flow rate of each pipeline meets the target flow rate and the total resistance value is minimized.

[0012] In some specific embodiments, the method further includes: when the test bench is in a preset working state, adjusting the heating parameters of the heating element of the test bench, and obtaining the coolant temperature difference between the inlet and outlet of the radiator of the test bench and the coolant temperature at the inlet of the heating element; based on the coolant temperature difference and the coolant temperature, adjusting the flow rate of the water pump of the test bench and the heat dissipation parameters of the radiator, so that the coolant temperature difference and the coolant temperature meet the target coolant temperature difference and the target coolant temperature respectively.

[0013] In some specific embodiments, the method further includes: when the test bench is in a preset working state, controlling the coolant of the test bench to be at different preset coolant temperatures; obtaining the current flow rate of each pipeline of the test bench at the preset coolant temperature, and establishing the correspondence between the preset working state, coolant temperature and current flow rate.

[0014] A second aspect of this application provides a test bench, which includes piping, components, and a controller. The piping and components are used to simulate the thermal management system of a vehicle, and the controller is used to control the components to implement the test method of the test bench as described above.

[0015] The beneficial technical effects of this application are at least as follows: Based on the test bench and test method provided in this application, the test method is applied to the test bench, which is used to simulate the thermal management system of a vehicle. The method includes: when the test bench is in a preset working state, controlling the water pump to operate at different preset powers; acquiring the current noise and current heat dissipation flow rate of the test bench, as well as the current energy consumption of the test bench when the water pump operates at different preset powers; wherein, the current heat dissipation flow rate is the coolant flow rate through the radiator; determining the target power from the preset power based on the current noise, current heat dissipation flow rate, and current energy consumption, so that the current noise and current heat dissipation flow rate corresponding to the target power respectively meet the target noise and target heat dissipation flow rate, and the corresponding current energy consumption is minimized. Therefore, it is possible to test the target power that balances noise, heat dissipation flow rate, and energy consumption when the test bench is in a preset working state, thereby providing theoretical data support for performance optimization in the actual application of the thermal management system.

[0016] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description

[0017] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the structure of one embodiment of the test bench provided in this application; Figure 2 This is a schematic flowchart of an embodiment of the testing method for the test bench provided in this application; Figure 3 This is a schematic flowchart of another embodiment of the testing method for the test bench provided in this application; Figure 4 This is a schematic flowchart of another embodiment of the testing method for the test bench provided in this application; Figure 5 This is a schematic flowchart of another embodiment of the testing method for the test bench provided in this application; Figure 6 This is a schematic flowchart of another embodiment of the testing method for the test bench provided in this application; Figure 7 This is a schematic flowchart of another embodiment of the testing method for the test bench provided in this application; Figure 8 This is a schematic flowchart of another embodiment of the testing method for the test bench provided in this application; Figure 9 This is a schematic flowchart of another embodiment of the testing method for the test bench provided in this application; Figure 10 This is a flowchart illustrating another embodiment of the testing method for the test bench provided in this application. Detailed Implementation

[0018] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited to the embodiments set forth herein. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.

[0019] If the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, if the word "and / or" appears throughout the text, it means including three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0020] The first aspect of this application provides a test method for a test bench, the test method being applied to the test bench, the test bench being used to simulate the thermal management system of a vehicle. Figure 1 This is a schematic diagram of the structure of an embodiment of the test bench 10 provided in this application.

[0021] Combination Figure 1 The test bench 10 can simulate part of the structure of a vehicle's thermal management system. In this embodiment, the test bench 10 can simulate the thermal management system of a vehicle's electric drive system. The test bench 10 includes a main pipe 11 and three branch pipes, namely, a first branch pipe 12, a second branch pipe 13, and a third branch pipe 14. The pipes in the main pipe and branch pipes can be formed by 3D printing. The relevant components in the pipes can be actual components used in the thermal management system, or other relevant components that can simulate actual components used in the thermal management system; no specific limitations are imposed.

[0022] Specifically, the branch pipes of the test bench 10 can be equipped with heating elements, resistance elements, etc., to simulate the relevant pipes actually used in the thermal management system. The main pipes can be equipped with water pumps, radiators, etc., which can be actual components used in the thermal management system. Temperature sensors, flow sensors, and pressure sensors can be installed in the pipes of the thermal management system to obtain the temperature parameters, flow parameters, and pressure parameters of the coolant in the pipes, respectively. The temperature parameter is used to obtain the temperature of the coolant, and the flow parameters are used to obtain the flow rate of the coolant.

[0023] Figure 2 This is a schematic flowchart of an embodiment of the testing method for the test bench provided in this application. (In conjunction with...) Figure 2 The testing method for the test bench includes the following steps: S101: When the test bench is in the preset working state, control the water pump to work at different preset power.

[0024] The system includes preset operating states, which can be any operating state that needs to be tested. Therefore, there can be multiple preset operating states to comprehensively test the test bench. When the test bench is in a preset operating state, some or all of the components of the test bench can be in a specific operating state, such as heaters, radiators, and water pumps.

[0025] During testing, if the test bench is not in its preset operating state, its components can be controlled to operate in specific states, thus bringing the test bench into the preset operating state. Once in the preset operating state, the water pump can be directly controlled to operate at different preset power levels. Multiple preset power levels can be set according to actual needs, and a larger number of preset power levels can be used to obtain more sets of test data in subsequent steps, achieving a more comprehensive testing effect.

[0026] S102: Obtain the current noise and current heat dissipation flow rate of the test bench when the water pump is operating at different preset power, as well as the current energy consumption of the test bench; wherein, the current heat dissipation flow rate is the flow rate of coolant flowing through the radiator.

[0027] It should be understood that test benches typically generate different levels of noise when the water pump operates at different power levels. This noise reflects the noise generated during the operation of the vehicle's thermal management system and affects the overall NVH (Noise, Vibration, and Harshness) performance of the vehicle. The current heat dissipation flow rate, which is the flow rate of coolant through the radiator, is a crucial measure of the thermal management system's heat dissipation capacity, and thus also a crucial measure of the test bench's heat dissipation capacity. Generally, a higher current heat dissipation flow rate indicates better coolant cooling by the radiator and better heat dissipation capacity of the test bench. The current energy consumption of the test bench, i.e., the energy consumption of the test bench when it is in its current preset operating state and the water pump is operating at a preset power, can be the total energy consumption of all components in the test bench, or it can be represented solely by the energy consumption of the water pump.

[0028] Therefore, in this step, the corresponding relationships between the preset power, current noise, current heat dissipation flow rate, and current energy consumption of the water pump under preset operating conditions can be obtained. Furthermore, since there are multiple preset power values ​​for the water pump, multiple sets of such preset relationships can be obtained.

[0029] S103: Determine the target power from the preset power based on the current noise, current heat dissipation flow rate and current energy consumption, so that the current noise and current heat dissipation flow rate corresponding to the target power meet the target noise and target heat dissipation flow rate respectively, and the corresponding current energy consumption is minimized.

[0030] Through the above steps, we can obtain the correspondence between multiple preset power, current noise, current heat dissipation flow, and current energy consumption.

[0031] When the test bench is in its preset operating state, there are certain requirements for its noise level and current airflow. Specifically, the noise level of the test bench must not be too high, and the current heat dissipation airflow must not be too low. The preset operating state of the test bench can be configured with target noise and target heat dissipation airflow, meaning there is a corresponding relationship between the preset operating state and these target noise and target heat dissipation airflow.

[0032] The target power is determined from preset power values ​​based on current noise, current heat dissipation flow, and current energy consumption. Alternatively, a preset power value can be selected as the target power from multiple preset power values ​​based on these factors. The target power is defined by the current noise and current heat dissipation flow satisfying the target noise and target heat dissipation flow requirements, respectively; that is, the current noise is less than the target noise, and the current heat dissipation flow is greater than the target heat dissipation flow. There may be multiple target powers where the current noise and current heat dissipation flow satisfy the target noise and target heat dissipation flow requirements. In this case, the target power with the lowest current energy consumption is selected as the final target power.

[0033] Based on the above, we can first select the correspondence between the current noise and the current heat dissipation flow rate that meets the target noise and the target heat dissipation flow rate, according to the multiple correspondences between the preset power, the current noise, the current heat dissipation flow rate and the current energy consumption. Then, we can retain the correspondence with the lowest current energy consumption and use the preset power in the last retained correspondence as the target power.

[0034] Once the target power is obtained, a correspondence between the preset operating state of the test bench and the target power can be established. During the actual operation of the vehicle's thermal management system, if the thermal management system is in the preset operating state, the water pump can be directly controlled to operate at the target power, thereby achieving a better noise experience, meeting the system's heat dissipation requirements, and resulting in lower system energy consumption, thus optimizing the overall thermal management system.

[0035] In summary, the testing method based on the test bench provided in the above embodiments can test the target power of the test bench in a preset working state, balancing noise, heat dissipation flow and energy consumption, thereby providing theoretical data support for performance optimization in the actual application of the thermal management system.

[0036] Figure 3 This is a schematic flowchart of another embodiment of the testing method for the test bench provided in this application.

[0037] Combination Figure 3 In some specific embodiments, the step of determining the target power from the preset power based on the current noise, current heat dissipation flow, and current energy consumption, i.e., the above-mentioned step S103, includes: S201: Based on the current noise and the target noise, determine the first target power range from the preset power, and based on the current heat dissipation flow and the target heat dissipation flow, determine the second target power range from the preset power.

[0038] It should be understood that among the correspondences between multiple sets of preset power, current noise, current heat dissipation flow, and current energy consumption, the preset power in the correspondence between the current noise and the target noise constitutes the first target power range, and the preset power in the correspondence between the current heat dissipation flow and the target heat dissipation flow constitutes the second target power range.

[0039] S202: Take the intersection of the first target power range and the second target power range as the target power range, and take the power with the lowest current energy consumption in the target power range as the target power.

[0040] It should be understood that the intersection of the first target power range and the second target power range constitutes the power range that can satisfy the target noise and target heat dissipation flow rate. At this point, the power with the lowest current energy consumption within the target power range is the power that satisfies all conditions, and is therefore taken as the target power.

[0041] Figure 4 This is a flowchart illustrating another embodiment of the testing method for the test bench provided in this application.

[0042] Combination Figure 4 In some specific embodiments, the step of obtaining the current noise of the test bench when the water pump operates at different preset power includes: S301: Obtain the first current noise of the water pump and the second current noise of the pipeline on the test bench when the water pump is operating at different preset power.

[0043] This step refines the current noise level. The current noise of the test bench includes the current noise of the water pump and the current noise of the pipeline, which are respectively designated as the first current noise and the second current noise. The second current noise of the pipeline can include the noise generated by the water flowing through the pipeline section, as well as the noise generated by the components in the pipeline.

[0044] The step of determining the first target power range from the preset power based on the current noise and the target noise includes: S302: Determine the first target power range from the preset power based on the first target noise and the second target noise corresponding to the first current noise and the second current noise, respectively; wherein, the target noise includes the first target noise and the second target noise.

[0045] Given that the current noise includes a first current noise and a second current noise, the target noise will include a first target noise and a second target noise. Then, based on the first target noise and the second target noise corresponding to the first current noise and the second current noise respectively, a first target power range is determined from the preset power. That is, a power range satisfying the first target noise is determined based on the first current noise, and a power range satisfying the second target noise is determined based on the second current noise. The intersection of the two power ranges is taken as the first target power range.

[0046] Figure 5 This is a flowchart illustrating another embodiment of the testing method for the test bench provided in this application.

[0047] Combination Figure 5 In some specific embodiments, this method further includes: S401: Obtain the current vibration level of the water pump when it operates at different preset power levels.

[0048] In this embodiment, the vibration of the water pump is further considered. Therefore, the current vibration level of the water pump is obtained when the water pump is operating at different preset power. This step can be performed together with the step of obtaining the water pump noise.

[0049] The step S103, which involves determining a target power from a preset power based on the current noise, current heat dissipation flow, and current energy consumption, such that the current noise and current heat dissipation flow corresponding to the target power meet the target noise and target heat dissipation flow requirements respectively, and the corresponding current energy consumption is minimized, includes: S402: Determine the target power from the preset power based on the current vibration level, current noise, current heat dissipation flow rate and current energy consumption, so that the current vibration level, current noise and current heat dissipation flow rate corresponding to the target power meet the target vibration level, target noise and target heat dissipation flow rate respectively, and the corresponding current energy consumption is the lowest.

[0050] When determining the target power, the vibration factor of the water pump is taken into account. Therefore, the target power is determined from the preset power based on the current vibration level, current noise, current heat dissipation flow rate, and current energy consumption. The specific determination method can be referred to the relevant method in the above embodiment. At this time, the target vibration level also has a corresponding relationship with the preset working state. The current vibration level meets the target vibration level, that is, the current vibration level is less than the target vibration level.

[0051] Figure 6 This is a flowchart illustrating another embodiment of the testing method for the test bench provided in this application.

[0052] Combination Figure 6 In some specific embodiments, before the step of controlling the water pump to operate at different preset power when the test bench is in a preset working state, i.e. before the above-mentioned step S101, the following is included: S501: When the test bench is in the preset working state, obtain the pipeline flow rate of each pipeline of the test bench.

[0053] Based on the above, the flow rate of the test bench's pipelines, that is, the flow rate of the main pipeline and each branch pipeline of the test bench, can be obtained in real time through flow sensors and pressure sensors.

[0054] S502: If the flow rate of any pipeline is outside the target flow rate range, adjust the resistance parameters of the resistance elements in the test bench pipeline to make the pipeline flow rate within the target flow rate range, and obtain the resistance parameters of each resistance element.

[0055] It should be understood that there is a preset correspondence between the preset operating state of the test bench and the target flow range, and different pipelines can correspond to different target flow ranges. The resistance parameters of the resistance elements in the test bench affect the ease with which the coolant passes through them. By adjusting the resistance parameters of the resistance elements in the test bench pipelines, the resistance value of the resistance elements can be adjusted, thereby regulating the flow rate of the branch in which they are located.

[0056] In some applications, adjusting the resistance parameter of a resistance element in a certain pipeline may cause changes in the flow rate in multiple pipelines. In such cases, it may be necessary to adjust the resistance parameters of resistance elements in multiple pipelines to ultimately ensure that the flow rate in each pipeline falls within its respective target flow rate range, and to obtain the resistance parameters of each resistance element. The resistance parameters of these resistance elements can then be applied during the subsequent actual setup of the thermal management system.

[0057] Figure 7 This is a flowchart illustrating another embodiment of the testing method for the test bench provided in this application.

[0058] Combination Figure 7 In some specific embodiments, if the flow rate of any pipeline is outside the target flow rate range, the resistance parameter of the resistance element in the test bench pipeline is adjusted to bring the pipeline flow rate within the target flow rate range. After obtaining the resistance parameter of each resistance element, i.e., after step S502 above, the following steps are included: S601: Add coolant to the test bench and obtain the location of air bubbles formed in the pipeline during the filling process.

[0059] After adjusting the resistance parameters of the components in the test bench piping, the test bench is then filled with coolant, and the location of the air bubbles formed in the piping during the filling process is obtained.

[0060] In some applications, the tubing of the test bench can be transparent, and fluorescent agents can be added to the coolant to record the filling process using a photosensitive camera. This allows the location of bubbles formed due to poor coolant flow during the filling process to be determined. For example, if a certain point in the tubing is too high, causing poor coolant flow and thus forming bubbles, this can be identified using a photosensitive camera.

[0061] S602: Adjust the pipeline layout based on bubble position to eliminate bubbles, thereby determining the target pipeline layout.

[0062] When air bubbles appear in the piping, coolant flow can be impeded. This step involves adjusting the piping layout to eliminate the air bubbles, primarily by changing the position of the piping. For example, adjusting the height of the piping can help eliminate air bubbles.

[0063] After adjusting the pipe positions to eliminate air bubbles, the final pipe layout is obtained; this layout is the target layout. In the practical application of vehicle thermal management systems, the pipe arrangement can be based on the target layout.

[0064] Figure 8 This is a flowchart illustrating another embodiment of the testing method for the test bench provided in this application.

[0065] Combination Figure 8 In some specific embodiments, this method further includes: S701: When the test bench is in the preset working state, adjust the resistance parameter of the resistance element of the test bench, and obtain the flow rate and total resistance value of the test bench pipeline.

[0066] In conjunction with the above embodiments, which involve adjusting the flow rate of the pipeline to the target flow rate range, this embodiment further adjusts the resistance parameters of the resistance elements, with the goal of determining a better resistance parameter setting method for each resistance element, thereby minimizing the total resistance value of the system.

[0067] It should be understood that during the adjustment of the resistance value of the resistance element, the flow rate of each pipeline will generally change, and the total resistance of all pipelines will also change. Therefore, after adjusting the resistance parameter of the resistance element, the flow rate value of each pipeline on the test bench and the total resistance value of all pipelines will be obtained. At this point, the correspondence between the resistance parameter, flow rate value, and total resistance value can be obtained.

[0068] S702: Establish the correspondence between the resistance change, flow rate change, and total resistance value during the test bench adjustment process, and adjust the resistance parameters of the resistance element according to the correspondence to ensure that the flow rate of each pipeline meets the target flow rate and the total resistance value is minimized.

[0069] Based on the parameter values ​​obtained during the above debugging process and the established correspondence, it is possible to obtain the correspondence between the change in resistance of a specific resistance element and the change in flow rate of each pipeline, and the total resistance value of all pipelines. For example, if there are two resistance elements, namely the first resistance element and the second resistance element, during the adjustment of the first resistance element, there is a correspondence between the change in resistance, the change in flow rate, and the change in total resistance, and the same applies to the second resistance element.

[0070] Once the corresponding relationship is obtained, the optimal adjustment method can be determined, thereby ensuring that the flow rate of each pipeline meets the target flow rate and the total resistance value is minimized after adjustment. For example, if the corresponding relationship shows that adjusting the first element results in a small change in the flow rate of each pipeline and a significant reduction in the total resistance value of the pipeline, then the resistance parameter of the first resistance element can be adjusted as a key focus.

[0071] The resistance parameters of each resistance element that are finally determined can be correlated with the preset working state, thereby providing data support when setting the resistance parameters of the vehicle thermal management system.

[0072] Figure 9 This is a flowchart illustrating another embodiment of the testing method for the test bench provided in this application.

[0073] Combination Figure 9 In some specific embodiments, the method further includes: S801: When the test bench is in the preset working state, adjust the heating parameters of the test bench heating element, and obtain the coolant temperature difference between the inlet and outlet of the test bench radiator and the coolant temperature at the inlet of the heating element.

[0074] It should be understood that in the preset operating state here, apart from the heating parameters of the heating element and the power of the water pump, all other parameters can be fixed. Adjusting the heating parameters of the heating element specifically means adjusting its heating power. Adjusting the heating parameters generally changes the temperature difference between the coolant at the radiator's inlet and outlet, and the temperature of the coolant at the inlet of each heating element in the pipeline may also change.

[0075] S802: Based on the coolant temperature difference and coolant temperature, adjust the flow rate of the test bench water pump and the heat dissipation parameters of the radiator so that the coolant temperature difference and coolant temperature meet the target coolant temperature difference and target coolant temperature respectively.

[0076] It should be understood that, under this preset operating state, target coolant temperature difference and target coolant temperature can be set accordingly. After obtaining the coolant temperature difference at the radiator inlet and outlet and the coolant temperature at the heating element inlet, if either the coolant temperature difference or the coolant temperature does not meet the corresponding target coolant temperature difference and target coolant temperature, the flow rate of the test bench water pump and the radiator's heat dissipation parameters are adjusted. This yields the coolant temperature difference and the coolant temperature when they respectively meet the target coolant temperature difference and target coolant temperature, and establishes a correspondence with the preset operating state for application in the vehicle thermal management system. The radiator's heat dissipation parameters can be the radiator's own operating parameters or environmental parameters, such as intake air temperature.

[0077] Figure 10 This is a flowchart illustrating another embodiment of the testing method for the test bench provided in this application.

[0078] Combination Figure 10 In some specific embodiments, the method further includes: S901: When the test bench is in a preset working state, control the coolant of the test bench to be at different preset coolant temperatures.

[0079] It should be understood that the coolant on the test bench generally has different viscosities when it is at different preset coolant temperatures, and this viscosity will affect the flow of coolant in the pipeline.

[0080] S902: Obtain the current flow rate of each pipeline on the test bench at the preset coolant temperature, and establish the correspondence between the preset working state, coolant temperature and current flow rate.

[0081] The preset operating conditions include the water pump power. Even if the water pump power is the same, differences in coolant viscosity due to temperature can result in different coolant flow rates in the pipelines. Therefore, a correspondence can be established between the operating conditions, coolant temperature, and current flow rate. In the actual application of the vehicle thermal management system, based on the operating conditions, coolant temperature, and the correspondence determined in this step, the current flow rate of each pipeline can be determined, thereby enabling further control of the thermal management system.

[0082] A second aspect of this application provides a test bench, which includes piping, components, and a controller. The piping and components are used to simulate a vehicle's thermal management system, and the controller is used to control the components to implement the testing method of the test bench as described in any of the above embodiments. The arrangement of the piping and components of the test bench can be found in the arrangement of the test bench 10 in the above embodiments.

[0083] In summary, based on the test bench and test method provided in this application, the test method is applied to the test bench, which is used to simulate the thermal management system of a vehicle. The method includes: controlling the water pump to operate at different preset power levels when the test bench is in a preset working state; acquiring the current noise and current heat dissipation flow rate of the test bench, as well as the current energy consumption of the test bench when the water pump operates at different preset power levels; wherein, the current heat dissipation flow rate is the coolant flow rate through the radiator; determining a target power from the preset power levels based on the current noise, current heat dissipation flow rate, and current energy consumption, so that the current noise and current heat dissipation flow rate corresponding to the target power respectively meet the target noise and target heat dissipation flow rate, and the corresponding current energy consumption is minimized. Therefore, it is possible to test the target power that balances noise, heat dissipation flow rate, and energy consumption when the test bench is in a preset working state, thereby providing theoretical data support for performance optimization in the actual application of the thermal management system.

[0084] The above description is merely a preferred exemplary embodiment of this application and is not intended to limit the implementation of this application. Those skilled in the art can easily make corresponding modifications or alterations based on the main concept and spirit of this application. Therefore, the scope of protection of this application should be determined by the scope of protection claimed in the claims.

Claims

1. A testing method for a test bench, characterized in that, The test method is applied to a test bench, which is used to simulate the thermal management system of a vehicle, and the method includes: When the test bench is in a preset working state, the water pump is controlled to work at different preset power. The test bench is equipped with the current noise and current heat dissipation flow rate of the water pump when it operates at different preset power levels, as well as the current energy consumption of the test bench; wherein, the current heat dissipation flow rate is the flow rate of coolant flowing through the radiator. The target power is determined from the preset power based on the current noise, the current heat dissipation flow rate, and the current energy consumption, so that the current noise and current heat dissipation flow rate corresponding to the target power meet the target noise and target heat dissipation flow rate respectively, and the corresponding current energy consumption is minimized.

2. The testing method for the test bench according to claim 1, characterized in that, The step of determining the target power from the preset power based on the current noise, the current heat dissipation flow, and the current energy consumption includes: Based on the current noise and the target noise, a first target power range is determined from the preset power, and based on the current heat dissipation flow rate and the target heat dissipation flow rate, a second target power range is determined from the preset power. The intersection of the first target power range and the second target power range is taken as the target power range, and the power with the lowest current energy consumption in the target power range is taken as the target power.

3. The testing method for the test bench according to claim 2, characterized in that, The step of obtaining the current noise of the test bench when the water pump operates at different preset power levels includes: The first current noise of the water pump and the second current noise of the pipeline of the test bench are obtained when the water pump operates at different preset power levels. The step of determining a first target power range from the preset power based on the current noise and the target noise includes: Based on the first target noise and the second target noise corresponding to the first current noise and the second current noise respectively, a first target power range is determined from the preset power; wherein, the target noise includes the first target noise and the second target noise.

4. The testing method for the test bench according to claim 1, characterized in that, The method further includes: Obtain the current vibration level of the water pump when it operates at different preset power levels; The step of determining a target power from the preset power based on the current noise, the current heat dissipation flow, and the current energy consumption, such that the current noise and current heat dissipation flow corresponding to the target power respectively meet the target noise and target heat dissipation flow, and the corresponding current energy consumption is minimized, includes: The target power is determined from the preset power based on the current vibration level, the current noise, the current heat dissipation flow rate, and the current energy consumption, so that the current vibration level, the current noise, and the current heat dissipation flow rate corresponding to the target power meet the target vibration level, the target noise, and the target heat dissipation flow rate, respectively, and the corresponding current energy consumption is minimized.

5. The testing method for the test bench according to claim 1, characterized in that, Before the step of controlling the water pump to operate at different preset power when the test bench is in a preset working state, the following steps are included: When the test bench is in a preset working state, the flow rate of each pipeline of the test bench is obtained; If the flow rate of any of the pipelines is outside the target flow rate range, the resistance parameter of the resistance element in the test bench pipeline is adjusted so that the flow rate of the pipeline is within the target flow rate range, and the resistance parameter of each resistance element is obtained.

6. The testing method for the test bench according to claim 5, characterized in that, If the flow rate of any of the pipelines is outside the target flow rate range, the resistance parameter of the resistance element in the test bench pipeline is adjusted to bring the flow rate within the target flow rate range. Following the step of obtaining the resistance parameter of each resistance element, the process includes: Coolant was added to the test bench, and the positions of the air bubbles formed in the pipeline during the addition process were obtained. The pipeline layout is adjusted based on the location of the air bubbles to eliminate them, thereby determining the target pipeline layout.

7. The testing method for the test bench according to claim 1, characterized in that, The method further includes: When the test bench is in a preset working state, adjust the resistance parameter of the resistance element of the test bench, and obtain the flow rate and total resistance value of the pipeline of the test bench. Establish a correspondence between the resistance change, flow rate change, and total resistance value during the adjustment process of the test bench. Adjust the resistance parameters of the resistance element according to the correspondence to ensure that the flow rate of each pipeline meets the target flow rate and the total resistance value is minimized.

8. The testing method for the test bench according to claim 1, characterized in that, The method further includes: When the test bench is in a preset working state, the heating parameters of the heating element of the test bench are adjusted, and the temperature difference of the coolant at the inlet and outlet of the radiator of the test bench and the temperature of the coolant at the inlet of the heating element are obtained. Based on the coolant temperature difference and the coolant temperature, the flow rate of the test bench water pump and the heat dissipation parameters of the radiator are adjusted so that the coolant temperature difference and the coolant temperature meet the target coolant temperature difference and the target coolant temperature, respectively.

9. The testing method for the test bench according to claim 1, characterized in that, The method further includes: When the test bench is in a preset working state, the coolant of the test bench is controlled to be at different preset coolant temperatures; The current flow rate of each pipeline on the test bench at the preset coolant temperature is obtained, and the correspondence between the preset working state, the coolant temperature and the current flow rate is established.

10. A test bench, characterized in that, The test bench includes piping, components, and a controller. The piping and components are used to simulate the thermal management system of a vehicle. The controller is used to control the components to implement the test method of the test bench as described in any one of claims 1-9.

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