Method and apparatus for testing durability of humidifier in fuel cell system for vehicle

Abstract

The application discloses a kind of durability test method and device of humidifier in vehicle fuel cell system, and the method comprises: obtaining the first test result by testing humidifier;Determine the durability road spectrum of humidifier, and control humidifier to run according to durability road spectrum until reach preset time, wherein, durability road spectrum includes lifting and lowering load condition, steady state condition and purge condition;The second test result is obtained by testing humidifier;According to the durability of humidifier is determined according to first test result and second test result.The durability of humidifier is tested based on the durability road spectrum of humidifier, the actual operation condition of humidifier can be more truly reflected, so that the service life of humidifier can be more accurately evaluated.

Description

Technical Field

[0001] This invention relates to the field of fuel cell testing technology, and in particular to a method and apparatus for testing the durability of a humidifier in a vehicle fuel cell system. Background Technology

[0002] A fuel cell system is a power generation system centered around a fuel cell stack. Various subsystems supply fuel and oxidant to the stack for reaction, producing electricity and pure water. Coolant circulation maintains the stack temperature. Vehicles powered by fuel cell systems offer advantages over traditional internal combustion engine vehicles or pure electric vehicles, including zero pollution, high efficiency, short refueling time, and long driving range, making them promising for future applications.

[0003] As a key component in a fuel cell system, the lifespan of the humidifier directly affects the operation of the fuel cell system. Therefore, durability tests are required to evaluate the lifespan of the humidifier.

[0004] In related technologies, the peak operating conditions of the fuel cell system are usually used as the input conditions of the humidifier for continuous durability testing. However, this method uses the peak operating conditions of the fuel cell system as the input conditions of the humidifier, which cannot truly reflect the actual operating conditions of the humidifier, and thus it is difficult to accurately assess the service life of the humidifier. Summary of the Invention

[0005] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the first objective of this invention is to propose a durability testing method for humidifiers in automotive fuel cell systems. This method performs durability testing on the humidifier based on a durability road spectrum, which can more realistically reflect the actual operating conditions of the humidifier, thereby enabling a more accurate assessment of the humidifier's lifespan.

[0006] A second objective of this invention is to provide a computer-readable storage medium.

[0007] The third objective of this invention is to provide a test bench for a humidifier.

[0008] The fourth objective of this invention is to provide a durability testing device for a humidifier in a vehicle fuel cell system.

[0009] To achieve the above objectives, a first aspect of the present invention provides a durability testing method for a humidifier in a vehicle fuel cell system. The method includes: testing the humidifier to obtain a first test result; determining the durability profile of the humidifier and controlling the humidifier to operate according to the durability profile until a preset time is reached, wherein the durability profile includes load increase / decrease conditions, steady-state conditions, and purging conditions; testing the humidifier to obtain a second test result; and determining the durability of the humidifier based on the first test result and the second test result.

[0010] According to the durability testing method for a humidifier in a vehicle fuel cell system of the present invention, an initial test is first performed on the humidifier to obtain a first test result. Then, based on a determined humidifier durability profile, the humidifier is controlled to operate under lifting and lowering load conditions, steady-state conditions, and purging conditions. After the operating time reaches a preset time, the humidifier is tested again to obtain a second test result. The durability of the humidifier is determined based on the first and second test results. Therefore, by conducting durability testing on the humidifier based on its durability profile, the actual operating conditions of the humidifier can be more realistically reflected, thereby allowing for a more accurate assessment of the humidifier's service life.

[0011] According to one embodiment of the present invention, determining the durability profile of a humidifier includes: determining the operating condition type based on the vehicle operating conditions, the fuel cell system operating conditions, and the characteristics of the humidifier, wherein the operating condition type includes load increase / decrease operating conditions, steady-state operating conditions, and purging operating conditions; and determining the operating parameters for each operating condition based on the vehicle operating conditions and the fuel cell system operating conditions, wherein the operating parameters include operating time and operating condition point.

[0012] According to an embodiment of the present invention, the operating conditions include first to fourth operating conditions, the lifting and lowering conditions include first to fourth operating conditions, the steady-state conditions include first to fourth operating conditions, and the purging conditions include fourth operating conditions, wherein the current density corresponding to the first to fourth operating conditions gradually increases, and the current density corresponding to the fourth operating condition is less than or equal to the peak current density.

[0013] According to one embodiment of the present invention, testing the humidifier to obtain a first test result includes: testing the humidifier at a first to a fourth operating point to obtain the first test result; testing the humidifier to obtain a second test result includes: testing the humidifier at a first to a fourth operating point to obtain the second test result.

[0014] According to one embodiment of the present invention, testing a humidifier includes: performing internal leakage testing, external leakage testing, and performance testing on the humidifier.

[0015] According to one embodiment of the present invention, the method further includes: obtaining the number of durability tests of the humidifier; when it is determined that the number of durability tests has not reached the preset number, controlling the humidifier to run according to the durability roadmap again until the preset time is reached, and testing the humidifier to obtain a second test result, repeating the process until it is determined that the number of durability tests has reached the preset number, and determining the durability of the humidifier based on each second test result and the first test result.

[0016] According to one embodiment of the present invention, determining the durability of a humidifier based on a first test result and a second test result includes: obtaining the performance degradation amount of the humidifier based on the first test result and the second test result; and determining the durability of the humidifier based on the performance degradation amount.

[0017] To achieve the above objectives, a second aspect of the present invention provides a computer-readable storage medium storing a durability test program for a humidifier in a vehicle fuel cell system. When executed by a processor, the durability test program for the humidifier implements the durability test method for the humidifier as described in the first aspect embodiment.

[0018] According to the computer-readable storage medium of the present invention, the durability test method for the humidifier described above, based on the durability roadmap of the humidifier, can more realistically reflect the actual operating conditions of the humidifier, thereby more accurately assessing the service life of the humidifier.

[0019] To achieve the above objectives, a third aspect of the present invention provides a test bench for a humidifier, comprising: a memory, a processor, and a durability test program for a humidifier in a vehicle fuel cell system stored in the memory and executable on the processor. When the processor executes the program, it implements the durability test method for the humidifier as described in the first aspect embodiment.

[0020] According to the humidifier test bench of the present invention, the humidifier durability test is conducted based on the durability roadmap of the humidifier using the above-described durability test method. This can more realistically reflect the actual operating conditions of the humidifier, thereby enabling a more accurate assessment of the humidifier's service life.

[0021] To achieve the above objectives, a fourth aspect of the present invention provides a durability testing device for a humidifier in a vehicle fuel cell system. The device includes: a testing module for testing the humidifier to obtain a first test result; a control module for determining the durability profile of the humidifier and controlling the humidifier to operate according to the durability profile until a preset time is reached, wherein the durability profile includes load increase / decrease conditions, steady-state conditions, and purging conditions; the testing module is also used to test the humidifier to obtain a second test result; and an analysis module for determining the durability of the humidifier based on the first and second test results.

[0022] According to an embodiment of the present invention, a durability testing device for a humidifier in a vehicle fuel cell system obtains a first test result by testing the humidifier through a testing module, and determines the durability profile of the humidifier through a control module to control the humidifier to operate under lifting and lowering load conditions, steady-state conditions, and purging conditions. After the operating time reaches a preset time, the humidifier is tested again through the testing module to obtain a second test result. The durability of the humidifier is determined by an analysis module based on the first and second test results. Therefore, by conducting durability testing on the humidifier based on its durability profile, the actual operating conditions of the humidifier can be more realistically reflected, thereby allowing for a more accurate assessment of the humidifier's service life.

[0023] 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

[0024] Figure 1 A flowchart illustrating a durability testing method for a humidifier in a vehicle fuel cell system according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a humidifier test bench according to an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the durability profile of a humidifier according to an embodiment of the present invention;

[0027] Figure 4 A flowchart of a durability testing method for a humidifier in a vehicle fuel cell system according to another embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of a durability testing device for a humidifier in a vehicle fuel cell system according to an embodiment of the present invention.

[0029] Figure 6 This is a schematic block diagram of a test bench for a humidifier according to an embodiment of the present invention. Detailed Implementation

[0030] 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.

[0031] The following description, with reference to the accompanying drawings, outlines a method, apparatus, computer-readable storage medium, and test bench for testing the durability of a humidifier in a vehicle fuel cell system, as proposed in embodiments of the present invention.

[0032] Figure 1 This is a flowchart illustrating a durability testing method for a humidifier in a vehicle fuel cell system according to an embodiment of the present invention. Figure 1 As shown, the durability testing method for the humidifier in this vehicle fuel cell system includes the following steps:

[0033] Step S101: Test the humidifier to obtain the first test result.

[0034] It should be noted that when conducting durability tests on humidifiers, you can first follow the... Figure 2 The humidifier test bench shown includes a humidifier system, a dry air system, a temperature control system a, and a temperature control system b. In some embodiments, the humidifier system is used for the preparation, filtration, and delivery of humidifiers, and has the function of regulating humidifier pressure and flow rate. In some embodiments, the dry air system is used for the preparation, filtration, and delivery of dry air, and has the function of regulating dry air pressure and flow rate. In some embodiments, temperature control system a can use electric heating / heat dissipation or water bath heating / heat dissipation to control the temperature of the input humidifier, thereby achieving the function of regulating humidifier temperature. In some embodiments, temperature control system b can also use electric heating / heat dissipation or water bath heating / heat dissipation to control the temperature of the input dry air, thereby achieving the function of regulating dry air temperature.

[0035] Specifically, after the humidifier test bench was set up, an initial test was conducted on the humidifier to obtain the first test results. These results include, but are not limited to, the humidifier's internal leakage value, external leakage value, dry-side pressure drop, wet-side pressure drop, dew point approach temperature, and moisture transfer efficiency. It is understood that this humidifier was not used after leaving the factory; this test is its first test since leaving the factory. The first test result serves as the baseline value for the humidifier's testing. In other words, a brand-new humidifier is used as an experimental sample to obtain its initial test results.

[0036] In some embodiments, testing the humidifier to obtain a first test result includes: testing the humidifier at first to fourth operating points respectively to obtain the first test result, wherein the current density corresponding to the first to fourth operating points gradually increases, and the current density corresponding to the fourth operating point is less than or equal to the peak current density. Optionally, testing the humidifier includes: performing internal leakage testing, external leakage testing, and performance testing on the humidifier.

[0037] Specifically, when testing the humidifier, internal leakage tests, external leakage tests, and performance tests were conducted sequentially at the first, second, third, and fourth operating points. It should be noted that the selection criteria for the first to fourth operating points are described below and will not be explained in detail here. For ease of testing, the current density corresponding to each operating point was used as an adjustment parameter. During the selection of operating points, the current density corresponding to the first to fourth operating points gradually increased, and the current density corresponding to the fourth operating point was less than or equal to the peak current density.

[0038] For example, the current density corresponding to the first to fourth operating points is set to 0.1 A / cm². 2 0.5A / cm 2 1.0A / cm 2 and 1.6A / cm 2 Furthermore, the current density corresponding to the fourth operating point is 1.6 A / cm². 2 As the peak current density corresponding to the peak operation of the humidifier, the humidifier is controlled at 0.1 A / cm². 2 0.5A / cm 2 1.0A / cm 2 and 1.6A / cm 2 The humidifier was operated at a specific current density, and during operation, internal leakage tests, external leakage tests, and performance tests were performed sequentially to obtain the humidifier's operating current density at 0.1 A / cm². 2 0.5A / cm 2 1.0A / cm 2 and 1.6A / cm 2 The test results at each current density were used as the first test result to measure the internal leakage value, external leakage value, dry-side pressure drop, wet-side pressure drop, dew point approach temperature, and moisture transfer efficiency of the humidifier.

[0039] Step S102: Determine the durability profile of the humidifier and control the humidifier to operate according to the durability profile until the preset time is reached. The durability profile includes lifting load condition, steady state condition and purging condition.

[0040] Specifically, after obtaining the first test result, the humidifier is controlled to operate in a cycle according to the determined durability spectrum, that is, the humidifier is controlled to operate in a cycle according to the lifting load condition, steady state condition and purging condition until the humidifier operates in a cycle for a preset time.

[0041] In some embodiments, determining the durability profile of the humidifier includes: determining the operating condition type based on the vehicle operating conditions, the fuel cell system operating conditions, and the characteristics of the humidifier, wherein the operating condition type includes load increase / decrease operating conditions, steady-state operating conditions, and purging operating conditions; and determining the operating parameters for each operating condition based on the vehicle operating conditions and the fuel cell system operating conditions, wherein the operating parameters include operating time and operating condition points. Optionally, the operating condition points include first to fourth operating condition points, the load increase / decrease operating conditions include first to fourth operating condition points, the steady-state operating conditions include first to fourth operating condition points, and the purging operating conditions include a fourth operating condition point.

[0042] Specifically, the operating conditions of the whole vehicle mainly include start-stop conditions and load conditions, while the operating conditions of the fuel cell system mainly include idling conditions, rated conditions, and peak conditions. The characteristics of the humidifier are that the humidification membrane in the humidifier is either in a dry state or a wet state. When determining the type of operating condition in the durability road spectrum, a comprehensive judgment is made based on the operating conditions of the whole vehicle, the operating conditions of the fuel cell system, and the characteristics of the humidifier.

[0043] For example, when the vehicle is in a start-stop state or the fuel cell system suddenly needs to supply power to a large load, the load power of the fuel cell stack changes significantly. Corresponding lifting and lowering load conditions are set to simulate situations with large changes in load power. When the vehicle and fuel cell system are running smoothly, the load power of the fuel cell stack changes less. Corresponding steady-state conditions are set to simulate a stable operating state. When the vehicle or fuel cell stops running, the moisture in the humidification membrane in the humidifier will gradually be lost and become dry. In order to simulate the switching between the dry and wet states of the humidification membrane, a purging condition is added to the durability spectrum to control the humidification membrane to become dry again during the purging condition and to prepare for the next cycle of the humidifier.

[0044] After determining the operating condition types in the durability roadmap, it is necessary to determine the operating condition points for each condition. To facilitate the development of the durability roadmap, four operating condition points are set, namely the first operating condition point, the second operating condition point, the third operating condition point, and the fourth operating condition point. Specifically, the operating condition point of the humidifier is determined based on the stack current density point corresponding to the operating power during the operation of the vehicle and the fuel cell system. In the process of selecting the operating condition points, four current density points with a large span are selected in ascending order as the operating condition points for this durability roadmap. That is to say, the first to fourth operating condition points are all related to current density, and the current density corresponding to the first to fourth operating condition points increases sequentially. It should be noted that the current density corresponding to the fourth operating condition point is less than or equal to the peak current density, that is, the fourth operating condition point must meet the requirement of being less than or equal to the peak current density.

[0045] During the durability roadmap development process, it is also necessary to determine the operating time for each operating condition. Among them, the operating time for the load increase / decrease operating condition is determined based on the load increase / decrease power rate required by the vehicle or customer (e.g., 10kW / s for load increase; 20kW / s for load decrease). This can be understood as the time required to reach the power point required by the vehicle or customer based on the current load increase / decrease power rate. The operating time for the steady-state operating condition is the time it takes for the humidity of the humidification membrane in the humidifier to reach saturation when the vehicle and fuel cell system are running stably. The operating time for the purging operating condition is the time it takes for the humidification membrane to become dry after the vehicle or fuel cell has stopped running and the humidifier has been purged.

[0046] The lifting load condition includes the first to fourth operating points, meaning that the humidifier runs at each of the first to fourth operating points for a period of time during the lifting load condition's operating time. The steady-state condition also includes the first to fourth operating points, meaning that the humidifier runs at each of the first to fourth operating points for a period of time during the steady-state condition's operating time. The purging condition includes the fourth operating point, meaning that the humidifier runs at the fourth operating point for a period of time during the purging condition's operating time. The humidifier cycles through the operating points (operating time) corresponding to the lifting load condition, the steady-state condition, and the purging condition until the humidifier's cycle time reaches the preset time.

[0047] Furthermore, as a specific example, such as Figure 3 As shown, assume the current density corresponding to the first to fourth operating conditions is 0.1 A / cm² respectively. 2 0.5A / cm 2 1.0A / cm 2 and 1.6A / cm 2 The humidifier operates under varying load conditions according to a current density of 0.1 A / cm². 2 Rise to 0.5A / cm 2 Current density from 0.5 A / cm 2 It dropped to 0.1 A / cm 2 Current density from 0.1 A / cm 2 Rise to 1.0 A / cm 2 Current density from 1.0 A / cm 2 It dropped to 0.1 A / cm 2 Current density from 0.1 A / cm 2 Rising to 1.6A / cm 2 After running for a total of 75 seconds, the humidifier transitions to steady-state operation. During steady-state operation, the humidifier operates at a rate of 0.1 A / cm². 2 After the current density stabilized for 900 seconds, it was switched to a current density of 0.5 A / cm. 2The current density was kept stable, and after 600s it switched to a current density of 1.0 A / cm. 2 The current density is stable during operation, and after 450s, it switches to a current density of 1.6A / cm. 2 The current density is stable during operation, and after 300 seconds, it switches to purging mode. During purging mode, the humidifier operates at 1.6 A / cm². 2 The humidifier operates at the specified current density for 150 seconds. This process is repeated until the preset operating time is reached.

[0048] Therefore, dividing the durability spectrum into lifting load conditions, steady-state conditions, and purging conditions, and determining the operating time and operating point of each condition, can more realistically reflect the actual operating conditions of the humidifier and help improve the accuracy of humidifier lifespan assessment.

[0049] Step S103: Test the humidifier to obtain the second test result.

[0050] Specifically, after the humidifier has operated according to the durability roadmap for a preset period, it is tested again to obtain a second test result. This second test result includes, but is not limited to, the humidifier's internal leakage value, external leakage value, dry-side pressure drop, wet-side pressure drop, dew point approach temperature, and moisture transfer efficiency. It is understood that the second test result differs from the first test result; the second test result represents the humidifier after operating according to the durability roadmap. Therefore, testing the humidifier after operating according to the durability roadmap ensures that the test results are closer to the actual test results after the humidifier is in operation.

[0051] In some embodiments, testing the humidifier to obtain a second test result includes testing the humidifier at first to fourth operating points respectively to obtain the second test result. Optionally, testing the humidifier may also include performing internal leakage testing, external leakage testing, and performance testing on the humidifier.

[0052] Specifically, when testing the humidifier after endurance road test, the first, second, third, and fourth operating points were selected to conduct internal leakage tests, external leakage tests, and performance tests on the humidifier sequentially. For example, the current density corresponding to the first to fourth operating points was set to 0.1 A / cm². 2 0.5A / cm 2 1.0A / cm 2 and 1.6A / cm 2 Furthermore, the current density corresponding to the fourth operating point is 1.6 A / cm². 2 As the peak current density corresponding to the peak operation of the humidifier, the humidifier is controlled at 0.1 A / cm² after endurance circuit testing.2 0.5A / cm 2 1.0A / cm 2 and 1.6A / cm 2 The humidifier was operated at a specific current density, and during operation, internal leakage tests, external leakage tests, and performance tests were sequentially performed on the humidifier after the durability test to obtain the humidifier's current density at 0.1 A / cm². 2 0.5A / cm 2 1.0A / cm 2 and 1.6A / cm 2 The test results at each current density were used as the second test results, including the internal leakage value of the humidifier, the external leakage value of the humidifier, the dry-side pressure drop, the wet-side pressure drop, the dew point approach temperature, and the moisture transfer efficiency.

[0053] Step S104: Determine the durability of the humidifier based on the first test results and the second test results.

[0054] Specifically, the durability of the humidifier is determined by comparing the internal leakage value, external leakage value, dry-side pressure drop, wet-side pressure drop, dew point approach temperature, and moisture transfer efficiency of the humidifier at the same operating conditions in the first and second test results.

[0055] In some embodiments, determining the durability of a humidifier based on a first test result and a second test result includes: obtaining the performance degradation amount of the humidifier based on the first test result and the second test result; and determining the durability of the humidifier based on the performance degradation amount.

[0056] Specifically, the performance degradation of the humidifier is obtained based on the results of the first and second tests. For example, the humidifier is set to operate at 0.1 A / cm². 2 The internal leakage value, external leakage value, dry-side voltage drop, wet-side voltage drop, dew point proximity temperature, and moisture transfer efficiency of the humidifier were obtained at the current density, and compared with those of the humidifier after endurance road test at 0.1 A / cm². 2 The internal leakage value, external leakage value, dry-side voltage drop, wet-side voltage drop, dew point approach temperature, and moisture transfer efficiency of the humidifier are compared under current density. The performance degradation of the internal leakage value, external leakage value, dry-side voltage drop, wet-side voltage drop, dew point approach temperature, and moisture transfer efficiency of the humidifier before and after the durability test is obtained. Optionally, according to the durability judgment criteria, the weight of each performance degradation value is assigned, and the performance degradation value of the humidifier can be determined by weighted summation. The durability of the humidifier is determined based on the performance degradation value. The larger the performance degradation value, the worse the durability. The smaller the performance degradation value, the better the durability.

[0057] According to the durability testing method for a humidifier in a vehicle fuel cell system of the present invention, an initial test is first performed on the humidifier to obtain a first test result. Then, based on a determined humidifier durability profile, the humidifier is controlled to operate under lifting and lowering load conditions, steady-state conditions, and purging conditions. After the operating time reaches a preset time, the humidifier is tested again to obtain a second test result. The durability of the humidifier is determined based on the first and second test results. Therefore, by conducting durability testing on the humidifier based on its durability profile, the actual operating conditions of the humidifier can be more realistically reflected, thereby allowing for a more accurate assessment of the humidifier's service life.

[0058] In some embodiments, such as Figure 4 As shown, the durability test method for the humidifier in the above-mentioned vehicle fuel cell system also includes:

[0059] Step S201: Obtain the number of durability tests conducted on the humidifier.

[0060] Specifically, when the humidifier is controlled to run according to the durability spectrum, if the running time reaches the preset time, it is considered that one durability test has been completed. The number of durability tests is determined based on the number of times the humidifier's running time reaches the preset time.

[0061] Step S202: If the number of durability tests has not reached the preset number, control the humidifier to run according to the durability roadmap again until the preset time is reached, and test the humidifier to obtain the second test result. Repeat the process until the number of durability tests has reached the preset number. Determine the durability of the humidifier based on each second test result and the first test result.

[0062] Specifically, the number of durability tests is compared with the preset number. If the number of durability tests is less than the preset number, the humidifier continues to operate according to the durability spectrum. When the operating time reaches the preset time, the humidifier is tested to obtain a second test result. The durability of the humidifier is determined based on the current second test result and the first test result. At the same time, the number of durability tests is updated (the number of durability tests is incremented by one). The number of durability tests is compared with the preset number. If the number of durability tests is less than the preset number, the above steps are repeated. If the number of durability tests is greater than or equal to the preset number, the humidifier is stopped.

[0063] Further, as a specific example, the preset number of durability tests for the humidifier is set to 10, and the preset time is set to 500 hours. Assuming the current number of durability tests is 0, the number of durability tests is less than the preset number, and the humidifier is controlled to operate according to the durability roadmap. When the humidifier has been operating according to the durability roadmap for 500 hours, the humidifier is tested to obtain a second test result. The durability of the humidifier is determined based on the current second test result and the first test result. At the same time, the current number of durability tests is updated to 1, indicating that the number of durability tests is less than the preset number, and the humidifier continues to operate according to the durability roadmap. When the operating time reaches the preset time, the humidifier is tested again to obtain a second test result. The durability of the humidifier is determined based on the current second test result and the first test result. At the same time, the current number of durability tests is updated to 2, and so on. When the number of durability tests is updated to 10, the number of durability tests is greater than or equal to the preset number, and the humidifier is controlled to stop operating.

[0064] This allows for multiple durability tests of the humidifier, reducing testing errors and improving the accuracy of humidifier lifespan assessment.

[0065] In summary, the durability testing method for a humidifier in a vehicle fuel cell system according to embodiments of the present invention first performs an initial test on the humidifier to obtain a first test result. Then, based on a determined humidifier durability profile, the humidifier is controlled to operate under load increase / decrease conditions, steady-state conditions, and purging conditions. After the operating time reaches a preset time, the humidifier is tested again to obtain a second test result. The durability of the humidifier is determined based on the first and second test results. Therefore, by conducting durability testing on the humidifier based on its durability profile, the actual operating conditions of the humidifier can be more realistically reflected, thereby allowing for a more accurate assessment of the humidifier's service life.

[0066] Figure 5 This is a schematic diagram of a durability testing device for a humidifier in a vehicle fuel cell system according to an embodiment of the present invention. Figure 5 As shown, the durability testing device 100 for the humidifier in the vehicle fuel cell system includes: a testing module 110, a control module 120, and an analysis module 130.

[0067] The testing module 110 is used to test the humidifier to obtain a first test result and to test the humidifier to obtain a second test result; the control module 120 is used to determine the durability spectrum of the humidifier and control the humidifier to operate according to the durability spectrum until a preset time is reached, wherein the durability spectrum includes lifting load conditions, steady-state conditions and purging conditions; the analysis module 130 is used to determine the durability of the humidifier based on the first test result and the second test result.

[0068] In some embodiments, the control module 120 is specifically used to: determine the operating condition type based on the vehicle operating condition, the fuel cell system operating condition, and the characteristics of the humidifier, wherein the operating condition type includes load increase / decrease condition, steady-state condition, and purging condition; and determine the operating parameters of each operating condition based on the vehicle operating condition and the fuel cell system operating condition, wherein the operating parameters include operating time and operating condition point.

[0069] In some embodiments, the operating condition points include the first to fourth operating conditions, the lifting load condition includes the first to fourth operating conditions, the steady state condition includes the first to fourth operating conditions, and the purging condition includes the fourth operating condition point. The current density corresponding to the first to fourth operating conditions gradually increases, and the current density corresponding to the fourth operating condition point is less than or equal to the peak current density.

[0070] In some embodiments, the test module 110 is specifically used to: test the humidifier at the first to fourth operating conditions respectively to obtain a first test result; and test the humidifier at the first to fourth operating conditions respectively to obtain a second test result.

[0071] In some embodiments, the test module 110 is specifically used to perform internal leakage testing, external leakage testing, and performance testing on the humidifier.

[0072] In some embodiments, the durability testing device for the humidifier in the above-described vehicle fuel cell system further includes an acquisition module (not shown in the figure), which is specifically used to: acquire the number of durability tests of the humidifier; the control module 120 is specifically used to: when it is determined that the number of durability tests has not reached the preset number, control the humidifier to run according to the durability roadmap again until the preset time is reached, repeat the execution until it is determined that the number of durability tests has reached the preset number; the testing module 110 is specifically used to: test the humidifier for each repeated durability test to obtain a second test result; the analysis module 130 is also specifically used to: determine the durability of the humidifier based on each second test result and the first test result.

[0073] In some embodiments, the analysis module 130 is specifically used to: obtain the performance degradation amount of the humidifier based on the first test result and the second test result; and determine the durability of the humidifier based on the performance degradation amount.

[0074] It should be noted that the description of the durability testing device for the humidifier in the vehicle fuel cell system in this application is the same as the description of the durability testing method for the humidifier in the vehicle fuel cell system in this application, and will not be repeated here.

[0075] According to an embodiment of the present invention, a durability testing device for a humidifier in a vehicle fuel cell system obtains a first test result by testing the humidifier through a testing module, and determines the durability profile of the humidifier through a control module to control the humidifier to operate under lifting and lowering load conditions, steady-state conditions, and purging conditions. After the operating time reaches a preset time, the humidifier is tested again through the testing module to obtain a second test result. The durability of the humidifier is determined by an analysis module based on the first and second test results. Therefore, by conducting durability testing on the humidifier based on its durability profile, the actual operating conditions of the humidifier can be more realistically reflected, thereby allowing for a more accurate assessment of the humidifier's service life.

[0076] Figure 6 This is a schematic block diagram of a test bench for a humidifier according to an embodiment of the present invention. Figure 6 As shown, the test bench 200 for the humidifier includes a memory 210 and a processor 220. The durability test program for the humidifier in the vehicle fuel cell system is stored in the memory 210 and can be run on the processor 220. When the processor 220 executes the program, it implements the aforementioned durability test method for the humidifier in the vehicle fuel cell system.

[0077] According to the humidifier test bench of the present invention, the humidifier durability test is conducted based on the durability roadmap of the humidifier using the above-described durability test method. This can more realistically reflect the actual operating conditions of the humidifier, thereby enabling a more accurate assessment of the humidifier's service life.

[0078] In addition, embodiments of the present invention also provide a computer-readable storage medium storing a durability test program for a humidifier in a vehicle fuel cell system, which, when executed by a processor, implements the humidifier durability test method as described above.

[0079] According to the computer-readable storage medium of the present invention, the durability test method for the humidifier described above, based on the durability roadmap of the humidifier, can more realistically reflect the actual operating conditions of the humidifier, thereby more accurately assessing the service life of the humidifier.

[0080] 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 embodied 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 (a non-exhaustive list) of computer-readable media include: 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.

[0081] 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.

[0082] 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.

[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] 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 durability testing method for a humidifier in a vehicle fuel cell system, characterized in that, The method includes: The humidifier was tested to obtain the first test result; Determine the durability profile of the humidifier and control the humidifier to operate according to the durability profile until a preset time is reached, wherein the durability profile includes lifting load conditions, steady state conditions and purging conditions; The humidifier was tested to obtain a second test result; The durability of the humidifier is determined based on the first test results and the second test results.

2. The durability testing method for a humidifier according to claim 1, characterized in that, Determining the durability profile of the humidifier includes: The operating condition type is determined based on the vehicle operating condition, the fuel cell system operating condition, and the characteristics of the humidifier. The operating condition type includes the lifting load condition, the steady-state condition, and the purging condition. The operating parameters for each operating condition are determined based on the vehicle operating conditions and the fuel cell system operating conditions. The operating parameters include operating time and operating condition point.

3. The durability testing method for a humidifier according to claim 2, characterized in that, The operating conditions include the first to the fourth operating conditions, the lifting and lowering conditions include the first to the fourth operating conditions, the steady-state conditions include the first to the fourth operating conditions, and the purging conditions include the fourth operating condition. The current density corresponding to the first to the fourth operating conditions gradually increases, and the current density corresponding to the fourth operating condition is less than or equal to the peak current density.

4. The durability testing method for a humidifier according to claim 3, characterized in that, The test of the humidifier to obtain the first test result includes: The humidifier was tested at the first to fourth operating points to obtain the first test results; The second test result obtained by testing the humidifier includes: The humidifier was tested at the first to fourth operating points to obtain the second test results.

5. The durability testing method for a humidifier according to claim 4, characterized in that, The testing of the humidifier includes: internal leakage testing, external leakage testing, and performance testing.

6. The durability test method for a humidifier according to any one of claims 1-5, characterized in that, The method further includes: Obtain the number of durability tests conducted on the humidifier; If it is determined that the number of durability tests has not reached the preset number, the humidifier is controlled to run according to the durability roadmap again until the preset time is reached, and the humidifier is tested to obtain a second test result. This process is repeated until it is determined that the number of durability tests has reached the preset number. The durability of the humidifier is determined based on each second test result and the first test result.

7. The durability test method for a humidifier according to any one of claims 1-5, characterized in that, Determining the durability of the humidifier based on the first test result and the second test result includes: The performance degradation of the humidifier is obtained based on the first test result and the second test result. The durability of the humidifier is determined based on the amount of performance degradation.

8. A computer-readable storage medium, characterized in that, It stores a durability test program for a humidifier in a vehicle fuel cell system, which, when executed by a processor, implements the durability test method for a humidifier according to any one of claims 1-7.

9. A test stand for a humidifier, characterized in that, include: A memory, a processor, and a durability testing program for a humidifier in a vehicle fuel cell system, stored in the memory and executable on the processor, wherein when the processor executes the program, it implements a durability testing method for the humidifier according to any one of claims 1-7.

10. A durability testing device for a humidifier in a vehicle fuel cell system, characterized in that, The device includes: The testing module is used to test the humidifier and obtain a first test result; The control module is used to determine the durability spectrum of the humidifier and control the humidifier to operate according to the durability spectrum until a preset time is reached. The durability spectrum includes lifting load condition, steady state condition and purging condition. The testing module is also used to test the humidifier to obtain a second test result; An analysis module is used to determine the durability of the humidifier based on the first test result and the second test result.

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