Electrostatic test method, device, equipment and medium of hydrogen fuel cell system
By using electrostatic testing methods and devices, the static electricity accumulation in hydrogen fuel cell systems can be detected and protective measures can be taken, thus solving the hidden dangers of static electricity accumulation in hydrogen fuel cell systems and improving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING SINOHYTEC
- Filing Date
- 2023-11-17
- Publication Date
- 2026-06-26
AI Technical Summary
Existing technologies have failed to effectively detect and protect against static electricity buildup in hydrogen fuel cell systems, posing a safety hazard.
A method for electrostatic testing of a hydrogen fuel cell system is provided. The method measures the electrostatic voltage using an electrostatic tester and applies a set current density after the electrostatic voltage is deemed acceptable to determine whether there are any potential electrostatic hazards in the system. The method includes electrostatic testing and protective measures for pipelines and components, such as using composite conductive materials and antistatic sheaths.
This technology enables rapid location of static electricity accumulation in hydrogen fuel cell systems, reducing the risk of deflagration after hydrogen seal failure and improving system safety.
Smart Images
Figure CN117554711B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of fuel cell technology, and more specifically, to an electrostatic testing method, apparatus, equipment, and medium for a hydrogen fuel cell system. Background Technology
[0002] Using hydrogen fuel cells as a power source for automobiles enables efficient energy utilization and significantly reduces harmful emissions, making fuel cell vehicles a crucial future trend in automotive development. Hydrogen safety remains a significant risk factor for the industrial application of fuel cells. Due to the small size of hydrogen molecules, their wide flammability range, and low ignition energy, in addition to controlling the sealing performance of the hydrogen supply system, static electricity accumulation near hydrogen leak sites can pose safety hazards and lead to serious consequences. However, current technologies primarily focus on the sealing performance of the hydrogen supply system, neglecting research on the detection and protection against static electricity accumulation in hydrogen fuel cell systems. Summary of the Invention
[0003] In view of this, the purpose of this application is to provide a method, apparatus, equipment and medium for electrostatic testing of hydrogen fuel cell systems, which can quickly locate and detect the electrostatic accumulation of hydrogen fuel cell systems, and facilitate accurate electrostatic protection treatment.
[0004] Firstly, this application provides an electrostatic testing method for a hydrogen fuel cell system, the method comprising the following steps:
[0005] After connecting the hydrogen fuel cell system to be tested to the cooling system, hydrogen supply system and air system, it was placed in an environmental chamber for static placement.
[0006] An electrostatic voltage was measured in the electrostatic detection area of the hydrogen fuel cell system under test after it had been left to stand. The electrostatic detection area included the pipelines and components between the hydrogen inlet and the hydrogen exhaust of the hydrogen fuel cell system under test.
[0007] If the electrostatic voltage measurement result of the electrostatic detection area is qualified, a set current density is applied to the hydrogen fuel cell system under test;
[0008] An electrostatic voltage tester was used to measure the electrostatic detection area of the hydrogen fuel cell system under test after a set current density was applied, and to determine whether there was any electrostatic hazard in the hydrogen fuel cell system under test.
[0009] In one possible implementation, an electrostatic tester is used to measure the electrostatic voltage of the electrostatic detection area of the hydrogen fuel cell system to be tested after it has been left to stand, and a first maximum electrostatic voltage of the electrostatic detection area is obtained. If the first maximum electrostatic voltage does not exceed a set first electrostatic voltage threshold, the electrostatic voltage measurement result of the electrostatic detection area is deemed to be qualified.
[0010] In one possible implementation, applying a set current density to the hydrogen fuel cell system under test includes the following steps:
[0011] A current density application table is set up; the current density application table includes the application time and multiple different current density application values;
[0012] According to the current density application table, the corresponding current density application values are applied to the hydrogen fuel cell system under test in ascending order, and this continues until the application time is reached.
[0013] In one possible implementation, the step of using an electrostatic tester to measure the electrostatic voltage of the electrostatic detection area of the hydrogen fuel cell system under test after applying a set current density, and determining whether the hydrogen fuel cell system under test has any electrostatic hazards, includes the following steps:
[0014] After each application of the current density value to the hydrogen fuel cell system under test, an electrostatic tester is used to perform multiple electrostatic voltage measurements on all the pipelines and components included in the electrostatic detection area.
[0015] Calculate the average electrostatic voltage of each of the pipes and components, and select the maximum value from all the calculated average electrostatic voltages as the second highest electrostatic voltage of the electrostatic detection area;
[0016] If, after each application of the current density to the hydrogen fuel cell system under test, the measured second maximum electrostatic voltage does not exceed the set second electrostatic voltage threshold, it is determined that the hydrogen fuel cell system under test does not have any electrostatic hazards.
[0017] In one possible implementation, the following steps are included before performing electrostatic testing on the hydrogen fuel cell system under test:
[0018] Electrostatic tests were performed on all the pipes and components included in the electrostatic detection area of the hydrogen fuel cell system under test to determine that all the pipes and components were qualified.
[0019] In one possible implementation, performing electrostatic testing on all pipes and components within the electrostatic detection area of the hydrogen fuel cell system under test to determine that all pipes and components are qualified includes the following steps:
[0020] After connecting the pipeline and components to be tested to the hydrogen source, place them in the environmental chamber for settling.
[0021] An electrostatic voltage tester is used to measure the electrostatic voltage of the pipeline and components under test after they have been left to stand, and the first electrostatic voltage of the pipeline and components under test is obtained. Based on the set third electrostatic voltage threshold, the electrostatic voltage measurement result of the pipeline and components under test is judged to be qualified.
[0022] For the test pipeline and components whose electrostatic voltage measurement results are qualified, hydrogen gas source is introduced into them according to the set flow rate.
[0023] An electrostatic voltage tester is used to measure the electrostatic voltage of the pipeline and components to be tested through the hydrogen gas source, and a second electrostatic voltage of the pipeline and components to be tested is obtained; and the qualification of the pipeline and components to be tested is determined according to the set fourth electrostatic voltage threshold.
[0024] In one possible implementation, before performing electrostatic tests on all the pipes and components included in the electrostatic detection area of the hydrogen fuel cell system under test to determine that all the pipes and components are qualified, the following step is further included:
[0025] The non-metallic pipes in the pipelines and components are made of composite conductive materials, and the non-metallic pipe fittings in the pipelines and components are replaced with metal pipe fittings.
[0026] The non-metallic pipes in the pipelines and components are wrapped with anti-static protective sleeves.
[0027] Secondly, this application provides an electrostatic testing device for a hydrogen fuel cell system, the device comprising:
[0028] The initial setup module is used to connect the hydrogen fuel cell system to be tested with the cooling system, hydrogen supply system and air system, and then place it in the environmental chamber for settling.
[0029] The measurement module is used to measure the electrostatic voltage of the electrostatic detection area of the hydrogen fuel cell system under test after it has been left to stand. The electrostatic detection area includes the pipeline and components between the hydrogen inlet and the hydrogen exhaust of the hydrogen fuel cell system under test.
[0030] An application module is used to apply a set current density to the hydrogen fuel cell system under test if the electrostatic voltage measurement result of the electrostatic detection area is qualified.
[0031] The judgment module is used to measure the electrostatic voltage of the electrostatic detection area of the hydrogen fuel cell system under test after applying a set current density using an electrostatic tester, and to determine whether there is any electrostatic hazard in the hydrogen fuel cell system under test.
[0032] Thirdly, this application provides an electronic device comprising: a processor, a memory, and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor communicates with the memory via the bus, and when the machine-readable instructions are executed by the processor, the steps of the electrostatic testing method for the hydrogen fuel cell system as described in the first aspect are performed.
[0033] Fourthly, this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, performs the steps of the electrostatic testing method for a hydrogen fuel cell system as described in the first aspect.
[0034] This embodiment provides a method, apparatus, equipment, and medium for electrostatic testing of a hydrogen fuel cell system. After connecting the hydrogen fuel cell system to be tested to a cooling system, a hydrogen supply system, and an air system, it is placed in an environmental chamber for settling. An electrostatic voltage measurement instrument is used to measure the electrostatic voltage of the electrostatic detection area of the settling hydrogen fuel cell system. The electrostatic detection area includes the pipelines and components from the hydrogen inlet to the hydrogen exhaust of the hydrogen fuel cell system. If the electrostatic voltage measurement result of the electrostatic detection area is qualified, a set current density is applied to the hydrogen fuel cell system. The electrostatic voltage is then measured again in the electrostatic detection area of the hydrogen fuel cell system after the set current density is applied, and the presence of electrostatic hazards in the hydrogen fuel cell system is determined. This achieves electrostatic testing of the hydrogen fuel cell system, reduces the risk of deflagration after hydrogen seal failure, and improves the safety of the hydrogen fuel cell system. Attached Figure Description
[0035] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0036] Figure 1 This is a flowchart of the electrostatic testing method for the hydrogen fuel cell system described in one embodiment of this application;
[0037] Figure 2 This is a schematic diagram of the electrostatic detection area according to an embodiment of this application;
[0038] Figure 3 This is a flowchart illustrating the application of a predetermined current density to the hydrogen fuel cell system under test in one embodiment of this application.
[0039] Figure 4This is a flowchart illustrating the process of determining whether the hydrogen fuel cell system under test has a potential electrostatic precipitator risk, as described in one embodiment of this application.
[0040] Figure 5 This is a flowchart illustrating electrostatic testing of all pipelines and components included in the electrostatic detection area of the hydrogen fuel cell system under test, according to one embodiment of this application.
[0041] Figure 6 This is a schematic diagram of wrapping a non-metallic pipeline with an antistatic sheath in one embodiment of this application;
[0042] Figure 7 This is a structural block diagram of the electrostatic testing device for the hydrogen fuel cell system under test described in one embodiment of this application;
[0043] Figure 8 This is a structural block diagram of an electronic device described in one embodiment of this application. Detailed Implementation
[0044] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the accompanying drawings in this application are for illustrative and descriptive purposes only and are not intended to limit the scope of protection of this application. Furthermore, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of this application. It should be understood that the operations in the flowcharts may not be implemented in sequence, and steps without logical contextual relationships may be reversed or implemented simultaneously. In addition, those skilled in the art, guided by the content of this application, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts.
[0045] Furthermore, the described embodiments are only a portion of the embodiments of this application, and not all of them. The components of the embodiments of this application described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0046] It should be noted that the term "comprising" will be used in the embodiments of this application to indicate the presence of the features declared thereafter, but does not exclude the addition of other features.
[0047] In view of the technical problems raised in the background art, this application provides a method, apparatus, equipment and medium for electrostatic testing of hydrogen fuel cell systems, which can quickly locate and detect the electrostatic accumulation of hydrogen fuel cell systems, and facilitate accurate electrostatic protection treatment.
[0048] See the instruction manual appendix Figure 1 In one embodiment, the present application provides an electrostatic testing method for a hydrogen fuel cell system, the method comprising the following steps:
[0049] S1. After connecting the hydrogen fuel cell system to be tested to the cooling system, hydrogen supply system and air system, place it in the environmental chamber for static placement.
[0050] S2. Use an electrostatic tester to measure the electrostatic voltage of the electrostatic detection area of the hydrogen fuel cell system to be tested after it has been left to stand. The electrostatic detection area includes the pipeline and components between the hydrogen inlet and the hydrogen exhaust of the hydrogen fuel cell system to be tested.
[0051] S3. If the electrostatic voltage measurement result of the electrostatic detection area is qualified, apply the set current density to the hydrogen fuel cell system under test.
[0052] S4. Use an electrostatic tester to measure the electrostatic voltage of the electrostatic detection area of the hydrogen fuel cell system under test after applying a set current density, and determine whether there is any electrostatic hazard in the hydrogen fuel cell system under test.
[0053] In step S1, the reason for connecting the hydrogen fuel cell system under test to the cooling system, hydrogen supply system, and air system is to better simulate the actual operating state of the hydrogen fuel cell system under test and to make the measured electrostatic voltage more accurate. The reason for placing it in the environmental chamber for settling is to combine with step S2 to measure whether the initial electrostatic voltage of the hydrogen fuel cell system under test is qualified.
[0054] In one embodiment, the hydrogen fuel cell system to be tested, which is connected to the cooling system, hydrogen supply system and air system, can be placed in an environmental chamber. Then, the ambient temperature of the environmental chamber is set to -25°C, the relative humidity is set to 15%RH%, and the ambient wind speed is set to less than 1m / s. After standing for 12 hours, the electrostatic voltage of the electrostatic detection area of the hydrogen fuel cell system to be tested is measured using an electrostatic tester.
[0055] It should be noted that in other embodiments, the environmental chamber parameters and settling time can be set according to actual needs, and this application does not limit or fix them.
[0056] The electrostatic detection area can be found in the appendix of the instruction manual. Figure 2, including the pipelines and components between the hydrogen inlet and the hydrogen tail discharge in the to-be-tested hydrogen fuel cell system. For example, components such as hydrogen inlet pipes, hydrogen heat exchangers, solenoid valves, ejectors, safety valves, stack PACKs, water separation devices, exhaust valves, drain valves, etc., as well as the pipelines and cavities connecting these components. Specifically, in step S2, when using an electrostatic tester to measure the electrostatic voltage of the electrostatic detection area of the to-be-tested hydrogen fuel cell system after standing still, key detection is carried out at component connection points, flow path diameter changes, and bending positions. Data needs to be recorded after stabilizing for 2 seconds at each position, and 3 - 5 groups of data are tested. Calculate the average value as the electrostatic voltage of each pipeline and component, and find the highest value from the electrostatic voltages of all pipelines and components as the first highest electrostatic voltage of the electrostatic detection area. If the first highest electrostatic voltage does not exceed the set first electrostatic voltage threshold, it is determined that the electrostatic voltage measurement result of the electrostatic detection area is qualified.
[0057] Normally, since the to-be-tested hydrogen fuel cell system has been placed in the environmental chamber for 12 hours, the electrostatic voltages measured for each pipeline and component are generally zero or negligible. Therefore, the value of the set first highest electrostatic voltage is also relatively low. However, if the electrostatic voltage of a certain pipeline and component measured exceeds this first highest electrostatic voltage, it is determined that the electrostatic voltage measurement result of the electrostatic detection area of the to-be-tested hydrogen fuel cell system is unqualified. The reason may be that the standing time is too short and it needs to be re-stationed; or the pipelines and components used do not meet the standards and need to be replaced.
[0058] When the electrostatic voltage measurement result of the obtained electrostatic detection area is qualified, step S3 is executed. Specifically, refer to the attached Figure 3 of the specification, and apply a set current density to the to-be-tested hydrogen fuel cell system, including the following steps:
[0059] S301. Set a current density application table; the current density application table includes application time and multiple different current density application values;
[0060] S302. Apply the corresponding current density application values to the to-be-tested hydrogen fuel cell system sequentially from small to large according to the current density application table, and continue until the application time.
[0061] Specifically, in step S301, the current density application table can be seen in Table 1. In this embodiment, 6 different current density application values are selected, which are 800 mA / cm 2 、1150 mA / cm 2 、1500 mA / cm 2 、1750 mA / cm 2 、2000 mA / cm2 2200mA / cm 2 The application time is set to 1 minute. In step S302, a current density application device can be used to apply the corresponding current density application value to the hydrogen fuel cell system under test that has qualified initial electrostatic voltage according to the current density application table, and maintain it for 1 minute.
[0062]
[0063] Table 1
[0064] Participation instructions attached Figure 4 In step S4, the electrostatic voltage of the electrostatic detection area of the hydrogen fuel cell system under test is measured using an electrostatic tester after a set current density is applied, and the presence of potential electrostatic hazards in the hydrogen fuel cell system under test is determined. This includes the following steps:
[0065] S401. After each application of the current density value to the hydrogen fuel cell system under test, an electrostatic tester is used to perform multiple electrostatic voltage measurements on all the pipelines and components included in the electrostatic detection area.
[0066] S402. Calculate the average electrostatic voltage of each of the pipes and components, and select the maximum value from all the calculated average electrostatic voltages as the second highest electrostatic voltage of the electrostatic detection area.
[0067] S403. If the measured second highest electrostatic voltage does not exceed the set second electrostatic voltage threshold after each application of the current density value to the hydrogen fuel cell system under test, it is determined that the hydrogen fuel cell system under test does not have any electrostatic hazards.
[0068] Specifically, in steps S401-S403, after applying current density values to the hydrogen fuel cell system under test with an initial qualified electrostatic voltage according to Table 1 and maintaining them for a certain period of time, an electrostatic voltage tester is used to perform multiple electrostatic voltage measurements on all the pipes and components included in the electrostatic detection area. Particular attention is paid to component connection points, flow channel diameter changes, and bending positions. Data is recorded after stabilizing at each position for 2 seconds. 3-5 sets of data are tested, and the average value is calculated to obtain the average electrostatic voltage of each pipe and component. The highest value among all the average electrostatic voltages of the pipes and components is then identified as the second highest electrostatic voltage of the electrostatic detection area. If the second highest electrostatic voltage obtained each time does not exceed the set second electrostatic voltage threshold, it is determined that the hydrogen fuel cell system under test has no electrostatic hazards. If the second highest electrostatic voltage obtained in any instance exceeds the set second electrostatic voltage threshold, it is determined that the hydrogen fuel cell system under test has electrostatic hazards, and the corresponding pipes and components are promptly addressed. In one embodiment, the second electrostatic voltage threshold can be set to 0.8KV.
[0069] In this application, in order to avoid the potential problem of static electricity in the hydrogen fuel cell system under test, all the pipelines and components included in the static electricity detection area can be pre-tested to ensure that all the pipelines and components are qualified.
[0070] See the instruction manual appendix Figure 5 The electrostatic testing of all pipes and components within the electrostatic detection area of the hydrogen fuel cell system under test to determine that all pipes and components are qualified includes the following steps:
[0071] P1. After connecting the pipeline and components to be tested to the hydrogen source, place them in the environmental chamber for settling.
[0072] P2. Use an electrostatic tester to measure the electrostatic voltage of the pipeline and components under test after they have been left to stand, obtain the first electrostatic voltage of the pipeline and components under test, and determine whether the electrostatic voltage measurement result of the pipeline and components under test is qualified according to the set third electrostatic voltage threshold.
[0073] P3. For the test pipeline and components whose electrostatic voltage measurement results are qualified, hydrogen gas source is introduced into them according to the set flow rate.
[0074] P4. Use an electrostatic tester to measure the electrostatic voltage of the pipeline and components to be tested that are supplied with the hydrogen gas source, and obtain the second electrostatic voltage of the pipeline and components to be tested; and determine whether the pipeline and components to be tested are qualified according to the set fourth electrostatic voltage threshold.
[0075] Among them, steps P1 - P2 are for measuring whether the initial static voltage of the pipeline and components to be tested is qualified. Specifically, in step P1, the pipeline and components to be tested are selected one by one from all the pipelines and components, and the pipeline and components to be tested are connected to the hydrogen gas source. In an embodiment, one end of the pipeline and components to be tested is connected to the hydrogen gas source through a rubber hose or flange, and the other end is led out through a rubber hose, or the assembly relationship of the hydrogen fuel cell system to be tested is restored as much as possible, so that the pipeline and components to be tested are in the middle position of the test tooling and placed in the environmental chamber for 12 hours. Among them, the hydrogen gas source needs to meet the flow requirement of 2000 L / min. In step P2, when using an electrostatic tester to measure the static voltage of the pipeline and components to be tested after standing, the connection points of the components, the flow path diameter change, and the bending positions are key detection points. Data is recorded after each position is stable for 2 seconds, and 3 - 5 groups of data are tested. The average value is calculated to obtain the first static voltage of the pipeline and components to be tested. If the first static voltage obtained each time does not exceed the set third static voltage threshold, it is determined that the static voltage measurement result of the pipeline and components to be tested is qualified. Similarly, since the pipeline and components to be tested have been placed in the environmental chamber for 12 hours, the first static voltage measured is generally zero or very small, so the value of the set third highest static voltage is also relatively low.
[0076] In step P3, a hydrogen flow meter can be set to gradually introduce hydrogen with corresponding flow rates into the pipeline and components to be tested in ascending order according to the hydrogen flow meter and maintain it for 1 min. Among them, the hydrogen flow meter can be referred to Table 2, and 6 different hydrogen flow rates are selected, which are 600 L / min, 800 L / min, 1200 L / min, 1400 L / min, 1600 L / min, and 1800 L / min respectively. In step S4, when using an electrostatic tester to measure the static voltage of the pipeline and components to be tested into which the hydrogen gas source is introduced, the connection points of the components, the flow path diameter change, and the bending positions are key detection points. Data is recorded after each position is stable for 2 seconds, and 3 - 5 groups of data are tested. The average value is calculated to obtain the second static voltage of the pipeline and components to be tested. If the second static voltage obtained each time does not exceed the set fourth static voltage threshold, it is determined that the pipeline and components to be tested are qualified. In an embodiment, the fourth static voltage threshold can be set to 0.8 KV.
[0077] Serial Number 1 2 3 4 5 6 Flow rate (L / min) 600 800 1200 1400 1600 1800
[0078] Table 2
[0079] For the unqualified pipelines and components to be tested, especially the non - metal pipelines and non - metal pipe fittings that are prone to generating static electricity, the following measures can be taken to avoid them:
[0080] (1) Non-metallic pipelines use composite conductive materials, such as adding carbon nanotubes to silicone rubber to adjust the volume resistivity of the material so that it becomes an electrostatic conductor or electrostatic subconductor.
[0081] (2) In locations with high local electrostatic voltage, metal pipes can be used instead of non-metal pipes under permissible working conditions to reduce electrostatic voltage. The principle is that metal pipes have lower resistivity and are less prone to generating static electricity.
[0082] (3) For non-metallic pipelines or cavities along the route, where there are areas with relatively high electrostatic voltage, an anti-static sheath can be wrapped around the outer surface to prevent discharge. See the instruction manual appendix. Figure 6 The hose body 1 is typically made of materials with good insulation properties, such as silicone rubber or EPDM rubber. However, it is prone to surface static electricity when subjected to high-speed gas friction against the hose wall. The outer layer 2 is made of a material that does not easily generate static electricity, serving to isolate the surface static electricity. Based on different principles, there are two main methods. One method uses conductive materials such as metal wire, and then grounds the outer layer with a grounding wire, thus forming an electrostatic shield. The other method uses a material that does not generate static electricity to isolate the static-emitting surface and prevent discharge.
[0083] As can be seen, the electrostatic testing method for a hydrogen fuel cell system provided in this application simulates the usage scenario of the hydrogen fuel cell system and, after applying a set current density, measures the electrostatic voltage of all pipelines and components included in the electrostatic detection area. The highest value is used to determine whether there is a potential electrostatic hazard in the hydrogen fuel cell system under test, so as to facilitate accurate electrostatic protection treatment.
[0084] Based on the same inventive concept, this application also provides an electrostatic testing device for a hydrogen fuel cell system. Since the principle of the device in this application is similar to the electrostatic testing method for a hydrogen fuel cell system described above in this application, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be described again.
[0085] As per the instruction manual Figure 7 As shown, this application also provides an electrostatic testing device for a hydrogen fuel cell system, the device comprising:
[0086] The initial placement module 701 is used to connect the hydrogen fuel cell system to be tested with the cooling system, hydrogen supply system and air system, and then place it in the environmental chamber for settling.
[0087] The measurement module 702 is used to measure the electrostatic voltage of the electrostatic detection area of the hydrogen fuel cell system under test after it has been left to stand. The electrostatic detection area includes the pipeline and components between the hydrogen inlet and the hydrogen exhaust of the hydrogen fuel cell system under test.
[0088] The application module 703 is used to apply a set current density to the hydrogen fuel cell system under test if the electrostatic voltage measurement result of the electrostatic detection area is qualified.
[0089] The judgment module 704 is used to measure the electrostatic voltage of the electrostatic detection area of the hydrogen fuel cell system under test after applying a set current density using an electrostatic tester, and to determine whether there is any electrostatic hazard in the hydrogen fuel cell system under test.
[0090] In some embodiments, the measurement module 702 uses an electrostatic tester to measure the electrostatic voltage of the electrostatic detection area of the hydrogen fuel cell system to be tested after it has been left to stand, and obtains the first maximum electrostatic voltage of the electrostatic detection area. If the first maximum electrostatic voltage does not exceed the set first electrostatic voltage threshold, the electrostatic voltage measurement result of the electrostatic detection area is judged to be qualified.
[0091] In some embodiments, the application module 703 applies a set current density to the hydrogen fuel cell system under test, including:
[0092] Strain-pressure discrete point plots were drawn based on the measured compression changes of the target packaged battery cell under different pressures.
[0093] A current density application table is set up; the current density application table includes the application time and multiple different current density application values;
[0094] According to the current density application table, the corresponding current density application values are applied to the hydrogen fuel cell system under test in ascending order, and this continues until the application time is reached.
[0095] In some embodiments, the judgment module 704 uses an electrostatic tester to measure the electrostatic voltage of the electrostatic detection area of the hydrogen fuel cell system under test after a set current density is applied, and determines whether the hydrogen fuel cell system under test has any electrostatic hazards, including:
[0096] After each application of the current density value to the hydrogen fuel cell system under test, an electrostatic tester is used to perform multiple electrostatic voltage measurements on all the pipelines and components included in the electrostatic detection area.
[0097] Calculate the average electrostatic voltage of each of the pipes and components, and select the maximum value from all the calculated average electrostatic voltages as the second highest electrostatic voltage of the electrostatic detection area;
[0098] If, after each application of the current density to the hydrogen fuel cell system under test, the measured second maximum electrostatic voltage does not exceed the set second electrostatic voltage threshold, it is determined that the hydrogen fuel cell system under test does not have any electrostatic hazards.
[0099] In some embodiments, the apparatus further includes:
[0100] The determination module is used to perform electrostatic tests on all the pipelines and components included in the electrostatic detection area of the hydrogen fuel cell system under test before performing electrostatic tests on the hydrogen fuel cell system under test, so as to determine that all the pipelines and components are qualified.
[0101] In some embodiments, the determining module performs electrostatic tests on all the pipes and components included in the electrostatic detection area of the hydrogen fuel cell system under test, including:
[0102] After connecting the pipeline and components to be tested to the hydrogen source, place them in the environmental chamber for settling.
[0103] An electrostatic voltage tester is used to measure the electrostatic voltage of the pipeline and components under test after they have been left to stand, and the third highest electrostatic voltage of the pipeline and components under test is obtained; if the third highest electrostatic voltage does not exceed the set third electrostatic voltage threshold, the electrostatic voltage measurement result of the pipeline and components under test is judged to be qualified.
[0104] For the test pipeline and components whose electrostatic voltage measurement results are qualified, hydrogen gas source is introduced into them according to the set flow rate.
[0105] An electrostatic voltage tester is used to measure the electrostatic voltage of the pipeline and components to be tested that are supplied with the hydrogen gas source, and the fourth highest electrostatic voltage of the pipeline and components to be tested is obtained; if the fourth highest electrostatic voltage does not exceed the set fourth electrostatic voltage threshold, the pipeline and components to be tested are judged to be qualified.
[0106] In some embodiments, the apparatus further includes:
[0107] The replacement module is used to replace the non-metallic pipes in the pipelines and components with composite conductive materials, and to replace the non-metallic pipe fittings in the pipelines and components with metal pipe fittings; and to wrap the non-metallic pipes in the pipelines and components with anti-static sleeves.
[0108] This application provides an electrostatic testing device for a hydrogen fuel cell system. After connecting the hydrogen fuel cell system to be tested with a cooling system, a hydrogen supply system, and an air system via a pre-setting module, it is placed in an environmental chamber for settling. A measurement module uses an electrostatic tester to measure the electrostatic voltage of the electrostatic detection area of the settling hydrogen fuel cell system. The electrostatic detection area includes the pipelines and components from the hydrogen inlet to the hydrogen exhaust of the hydrogen fuel cell system. If the electrostatic voltage measurement result of the electrostatic detection area is qualified, a setting current density is applied to the hydrogen fuel cell system via an application module. A judgment module uses an electrostatic tester to measure the electrostatic voltage of the electrostatic detection area of the hydrogen fuel cell system after the setting current density is applied and determines whether there is a potential electrostatic hazard in the hydrogen fuel cell system. This achieves electrostatic testing of the hydrogen fuel cell system, reduces the risk of deflagration after hydrogen seal failure, and improves the safety of the hydrogen fuel cell system.
[0109] Based on the same concept of the present invention, the specification is attached. Figure 8 As shown in the figure, an embodiment of this application provides the structure of an electronic device 800, which includes: at least one processor 801, at least one network interface 804 or other user interface 803, a memory 805, and at least one communication bus 802. The communication bus 802 is used to realize the connection and communication between these components. The electronic device 800 may optionally include a user interface 803, including a display (e.g., touch screen, LCD, CRT, holographic imaging, or projector, etc.), a keyboard, or a clicking device (e.g., mouse, trackball, touchpad, or touch screen, etc.).
[0110] Memory 805 may include read-only memory and random access memory, and provides instructions and data to processor 801. A portion of memory 805 may also include non-volatile random access memory (NVRAM).
[0111] In some implementations, memory 805 stores elements that can protect modules or data structures, or subsets thereof, or extended sets thereof:
[0112] The 8051 operating system contains various system programs used to implement various basic business functions and handle hardware-based tasks.
[0113] Application module 8052 contains various applications, such as desktop launcher, media player, and browser, to implement various application functions.
[0114] In this embodiment, by calling the program or instructions stored in the memory 805, the processor 801 executes the steps in a method for testing the static electricity of a hydrogen fuel cell system, which can quickly locate and detect the static electricity accumulation of the hydrogen fuel cell system, facilitating accurate static electricity protection.
[0115] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, performs steps such as those in an electrostatic testing method for a hydrogen fuel cell system.
[0116] Specifically, the storage medium can be a general-purpose storage medium, such as a portable disk or hard disk. When the computer program on the storage medium is run, it can execute the electrostatic testing method for the hydrogen fuel cell system described above.
[0117] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and there may be other division methods in actual implementation. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the coupling or direct coupling or communication connection shown or discussed may be through some communication interface; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.
[0118] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0119] In addition, the functional units in the embodiments provided in this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.
[0120] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.
[0121] Finally, it should be noted that the above embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application. All should be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.
Claims
1. A method for electrostatic testing of a hydrogen fuel cell system, characterized in that, The method includes the following steps: After connecting the hydrogen fuel cell system to be tested to the cooling system, hydrogen supply system and air system, it was placed in an environmental chamber for static placement. An electrostatic voltage was measured in the electrostatic detection area of the hydrogen fuel cell system under test after it had been left to stand. The electrostatic detection area included the pipelines and components between the hydrogen inlet and the hydrogen exhaust of the hydrogen fuel cell system under test. If the electrostatic voltage measurement result of the electrostatic detection area is qualified, a set current density is applied to the hydrogen fuel cell system under test; An electrostatic voltage tester was used to measure the electrostatic detection area of the hydrogen fuel cell system under test after a set current density was applied, and to determine whether there was any electrostatic hazard in the hydrogen fuel cell system under test.
2. The electrostatic testing method for a hydrogen fuel cell system according to claim 1, characterized in that, in, An electrostatic voltage tester is used to measure the electrostatic voltage of the electrostatic detection area of the hydrogen fuel cell system under test after it has been left to stand. The first maximum electrostatic voltage of the electrostatic detection area is obtained. If the first maximum electrostatic voltage does not exceed the set first electrostatic voltage threshold, the electrostatic voltage measurement result of the electrostatic detection area is deemed to be qualified.
3. The electrostatic testing method for a hydrogen fuel cell system according to claim 2, characterized in that, Applying a set current density to the hydrogen fuel cell system under test includes the following steps: A current density application table is set up; the current density application table includes the application time and multiple different current density application values; According to the current density application table, the corresponding current density application values are applied to the hydrogen fuel cell system under test in ascending order, and this continues until the application time is reached.
4. The electrostatic testing method for a hydrogen fuel cell system according to claim 3, characterized in that, The process of measuring the electrostatic voltage of the electrostatic detection area of the hydrogen fuel cell system under test using an electrostatic tester after applying a set current density, and determining whether the hydrogen fuel cell system under test has any potential electrostatic hazards, includes the following steps: After each application of the current density value to the hydrogen fuel cell system under test, an electrostatic tester is used to perform multiple electrostatic voltage measurements on all the pipelines and components included in the electrostatic detection area. Calculate the average electrostatic voltage of each of the pipes and components, and select the maximum value from all the calculated average electrostatic voltages as the second highest electrostatic voltage of the electrostatic detection area; If, after each application of the current density to the hydrogen fuel cell system under test, the measured second maximum electrostatic voltage does not exceed the set second electrostatic voltage threshold, it is determined that the hydrogen fuel cell system under test does not have any electrostatic hazards.
5. The electrostatic testing method for a hydrogen fuel cell system according to claim 4, characterized in that, Before performing electrostatic testing on the hydrogen fuel cell system under test, the following steps are also included: Electrostatic tests were performed on all the pipes and components included in the electrostatic detection area of the hydrogen fuel cell system under test to determine that all the pipes and components were qualified.
6. The electrostatic testing method for a hydrogen fuel cell system according to claim 5, characterized in that, The electrostatic testing of all pipes and components within the electrostatic detection area of the hydrogen fuel cell system under test to determine that all pipes and components are qualified includes the following steps: After connecting the pipeline and components to be tested to the hydrogen source, place them in the environmental chamber for settling. An electrostatic voltage tester is used to measure the electrostatic voltage of the pipeline and components under test after they have been left to stand, and the first electrostatic voltage of the pipeline and components under test is obtained. Based on the set third electrostatic voltage threshold, the electrostatic voltage measurement result of the pipeline and components under test is judged to be qualified. For the test pipeline and components whose electrostatic voltage measurement results are qualified, hydrogen gas source is introduced into them according to the set flow rate. An electrostatic voltage tester is used to measure the electrostatic voltage of the pipeline and components to be tested through the hydrogen gas source, and a second electrostatic voltage of the pipeline and components to be tested is obtained; and the qualification of the pipeline and components to be tested is determined according to the set fourth electrostatic voltage threshold.
7. The electrostatic testing method for a hydrogen fuel cell system according to claim 6, characterized in that, Before performing electrostatic tests on all pipes and components included in the electrostatic detection area of the hydrogen fuel cell system under test to determine that all pipes and components are qualified, the following steps are also included: The non-metallic pipes in the pipelines and components are made of composite conductive materials, and the non-metallic pipe fittings in the pipelines and components are replaced with metal pipe fittings. The non-metallic pipes in the pipelines and components are wrapped with anti-static protective sleeves.
8. An electrostatic testing device for a hydrogen fuel cell system, characterized in that, The device includes: The initial setup module is used to connect the hydrogen fuel cell system to be tested with the cooling system, hydrogen supply system and air system, and then place it in the environmental chamber for settling. The measurement module is used to measure the electrostatic voltage of the electrostatic detection area of the hydrogen fuel cell system under test after it has been left to stand. The electrostatic detection area includes the pipeline and components between the hydrogen inlet and the hydrogen exhaust of the hydrogen fuel cell system under test. An application module is used to apply a set current density to the hydrogen fuel cell system under test if the electrostatic voltage measurement result of the electrostatic detection area is qualified. The judgment module is used to measure the electrostatic voltage of the electrostatic detection area of the hydrogen fuel cell system under test after applying a set current density using an electrostatic tester, and to determine whether there is any electrostatic hazard in the hydrogen fuel cell system under test.
9. An electronic device, characterized in that, include: The device includes a processor, a memory, and a bus. The memory stores machine-readable instructions executable by the processor. When the electronic device is running, the processor communicates with the memory via the bus. When the machine-readable instructions are executed by the processor, the steps of the electrostatic testing method for the hydrogen fuel cell system as described in any one of claims 1 to 7 are performed.
10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, performs the steps of the electrostatic testing method for the hydrogen fuel cell system as described in any one of claims 1-7.