A high and low temperature test chamber for hydrogen energy products
Patent Information
- Application Number
- CN202522497361.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-25
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-11-25
AI Technical Summary
[0003]本实用新型的目的是提供一种用于氢能源产品的高低温试验箱，用以解决现有的高低温试验箱无法直接用于氢能源产品的氢环境测试或测试效果不佳的问题
[0017]有益效果：本实用新型的用于氢能源产品的高低温试验箱可有效解决现有高低温试验箱在氢能源产品检测方面的安全隐患、精度缺陷与功能局限，实现了对氢能源产品从部件到系统的“安全、精准、合规”测试，既能支撑氢能产业规模化应用中的产品认证需求，也能为下一代氢能技术研发提供关键试验工具，具有显著的技术价值与产业应用价值。本申请的高低温试验箱的密封可靠性显著提升，泄漏率≤1×10-9 Pa·m³/s，可满足储氢瓶长期循环测试中“零泄漏”的严苛要求；防爆等级高可有效降低安全事故的发生概率。
Smart Images
Figure CN224878043U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of environmental testing equipment technology, and in particular relates to a high and low temperature test chamber for hydrogen energy products, which is suitable for performance testing of hydrogen energy-related components such as hydrogen fuel cells and hydrogen energy storage tanks under high and low temperature and humid heat environments. Background Technology
[0002] With the rapid development of hydrogen energy technology, products such as hydrogen fuel cells and hydrogen storage components need to undergo performance testing in high and low temperature alternating damp heat environments. However, traditional test chambers cannot meet the low energy consumption and environmental protection requirements of hydrogen energy scenarios, and lack dedicated safety protection structures for testing hydrogen energy components. This leads to problems such as the inability to monitor hydrogen leakage risks and energy waste during testing. Therefore, it is urgent to modify traditional high and low temperature alternating damp heat test chambers to meet the testing needs of hydrogen energy-related products. Utility Model Content
[0003] The purpose of this invention is to provide a high and low temperature test chamber for hydrogen energy products, in order to solve the problem that existing high and low temperature test chambers cannot be directly used for hydrogen environment testing of hydrogen energy products or the testing results are not good.
[0004] To achieve the above objectives, the technical solution of this utility model is as follows:
[0005] A high and low temperature test chamber for hydrogen energy products includes: a test chamber, a control unit, a detection unit disposed inside the test chamber, and an environmental parameter adjustment unit electrically connected to the inside of the test chamber;
[0006] The test chamber includes an outer shell, an explosion-proof layer, a thermal insulation layer, and an inner box arranged from the outside to the inside. The test chamber is equipped with a hydrogen supply port, an air inlet, and an air outlet. The inner box is equipped with hydrogen pipelines.
[0007] The detection unit includes a temperature sensor array, a humidity sensor array, a pressure sensor array, and a hydrogen concentration sensor array distributed on the inner box. The temperature sensor array, humidity sensor array, pressure sensor array, and hydrogen concentration sensor array are communicatively connected to the control unit.
[0008] The environmental parameter adjustment unit includes a hydrogen supply module and a temperature and humidity control module. The hydrogen supply module is connected to a hydrogen pipeline through a hydrogen supply port, and the temperature and humidity control module is connected to an air inlet and an air outlet.
[0009] The explosion-proof layer is a multi-layer welded stainless steel structure.
[0010] The inner box contains a test frame made of titanium alloy, and the surface of the test frame is coated with a graphene nano-coating for hydrogen embrittlement prevention.
[0011] The hydrogen pipeline interface uses a double compression fitting seal, and the surface of the hydrogen pipeline is wrapped with a PTFE insulation layer to prevent condensation from affecting the test accuracy at low temperatures.
[0012] The hydrogen supply module includes: a high-pressure hydrogen storage cylinder, a pressure reducing valve, a mass flow controller, a hydrogen filter, and a check valve. The pressure reducing valve and the mass flow controller are sequentially installed at the outlet of the high-pressure hydrogen storage cylinder, and the hydrogen filter and the check valve are installed at the supply port of the hydrogen supply module to prevent impurities from entering the test chamber and to prevent hydrogen backflow.
[0013] The high and low temperature test chamber also includes a control unit, which includes a PLC controller and a data acquisition card. The data acquisition card is connected to a temperature sensor array, a humidity sensor array, a pressure sensor array, and a hydrogen concentration sensor array. The PLC controller is communicatively connected to the hydrogen supply module and the temperature and humidity control module.
[0014] The hydrogen concentration sensor array includes several electrochemical hydrogen sensors, which are located at the top, middle, and bottom of the test chamber, as well as at the connection points of the hydrogen pipelines.
[0015] The humidity sensor array includes several hydrogen-compatible capacitive humidity sensors, which are located at the top, middle, and bottom of the test chamber.
[0016] The test chamber is equipped with an observation window, a test hole, and a pressure relief device. The connection between the observation window, the test hole, the pressure relief device, and the test chamber is statically sealed with a fluororubber sealing ring.
[0017] Beneficial Effects: This utility model's high and low temperature test chamber for hydrogen energy products effectively solves the safety hazards, accuracy deficiencies, and functional limitations of existing high and low temperature test chambers in hydrogen energy product testing. It achieves "safe, accurate, and compliant" testing of hydrogen energy products from components to systems, supporting product certification needs in large-scale hydrogen energy applications and providing a key testing tool for next-generation hydrogen energy technology research and development. It possesses significant technical and industrial application value. The sealing reliability of this high and low temperature test chamber is significantly improved, with a leakage rate ≤1×10⁻⁶. -9 Pa·m³ / s can meet the stringent requirement of "zero leakage" in long-term cyclic testing of hydrogen storage cylinders; the high explosion-proof rating can effectively reduce the probability of safety accidents. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the high and low temperature test chamber of this utility model;
[0019] Figure 2 This is a structural block diagram of the high and low temperature test chamber of this utility model.
[0020] In the diagram, 1-test chamber; 2-detection unit; 3-environmental parameter adjustment unit; 11-outer shell; 12-explosion-proof layer; 13-insulation layer; 14-inner chamber; 21-hydrogen concentration sensor array; 22-temperature sensor array; 23-humidity sensor array; 24-pressure sensor array; 31-hydrogen supply module; 32-temperature and humidity control module. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Example 1
[0023] refer to Figure 1 and Figure 2 As shown, a high and low temperature test chamber for hydrogen energy products includes: a test chamber 1, a control unit, a detection unit 2 disposed inside the test chamber 1, and an environmental parameter adjustment unit 3 electrically connected to the inside of the test chamber 1.
[0024] The test chamber 1 includes an outer shell 11, an explosion-proof layer 12, a heat insulation layer 13 and an inner box 14 arranged from the outside to the inside. The test chamber 1 is provided with a hydrogen supply port, an air inlet and an air outlet. The inner box 14 is provided with a hydrogen pipeline.
[0025] The detection unit 2 includes a temperature sensor array 22, a humidity sensor array 23, a pressure sensor array 24, and a hydrogen concentration sensor array 21 distributed on the inner box. The temperature sensor array, humidity sensor array, pressure sensor array, and hydrogen concentration sensor array are communicatively connected to the control unit.
[0026] The environmental parameter adjustment unit 3 includes a hydrogen supply module 31 and a temperature and humidity control module 32. The hydrogen supply module 31 is connected to a hydrogen pipeline through a hydrogen supply port, and the temperature and humidity control module 32 is connected to an air inlet and an air outlet.
[0027] The explosion-proof layer 12 adopts a multi-layer welded stainless steel structure, with the joints using a "V-groove + inert gas shielded welding" method, resulting in high welding strength and good explosion-proof performance. The test chamber 1 is equipped with an observation window, test holes, and a pressure relief device, and the connections are statically sealed with fluororubber sealing rings. The test holes allow the product to be tested to be connected to testing instruments for real-time data acquisition and processing, including polarization curve measurement, impedance spectroscopy measurement, and microstructure analysis.
[0028] The detection unit 2 includes: a temperature sensor array 22, a humidity sensor array 23, a pressure sensor array 24, and a hydrogen concentration sensor array 21, which are distributed on the inner box.
[0029] In this embodiment, the temperature sensor array 22 includes several temperature sensors distributed at the top, bottom and middle of the test chamber 1, and uses PT100 platinum resistance thermocouples with an accuracy of Class A.
[0030] The humidity sensor array 23 includes several hydrogen-compatible capacitive humidity sensors with a measurement range of 0-100%RH and a response time of ≤2s, distributed at the top, bottom and middle of the test chamber 1.
[0031] The pressure sensor array 24 includes several piezoelectric pressure sensors with a range of 0-105 MPa and an accuracy of ±0.1%FS, distributed at the top, bottom and middle of the test chamber 1.
[0032] The hydrogen concentration sensor array 21 includes several electrochemical hydrogen sensors with a range of 0-100%LEL and a response time of ≤1s. They are distributed at the top, middle, bottom, and connection points of the hydrogen pipeline in the test chamber 1.
[0033] The test chamber 1 houses a test rack made of titanium alloy. The rack's surface is coated with a 5μm thick graphene nano-coating for hydrogen embrittlement prevention, making it suitable for various test specimens, including 35MPa / 70MPa hydrogen storage cylinders and fuel cell stacks. The test rack is rigidly connected to an explosion-proof support at the bottom of the test chamber 1 via bolts. The explosion-proof support incorporates shock-absorbing springs to reduce the impact of temperature-induced shocks on the test specimens.
[0034] The test chamber 1 is equipped with hydrogen pipelines. The pipeline interfaces are sealed with double compression fittings. The pipeline surface is wrapped with a 10mm thick polytetrafluoroethylene insulation layer to prevent condensation from affecting the test accuracy at low temperatures.
[0035] The environmental parameter adjustment unit 3 includes a hydrogen supply module 31 and a temperature and humidity control module 32. The temperature and humidity control module 32 includes a two-stage compression cascade refrigeration unit, a finned evaporator, and an ultrasonic humidifier (humidity control range 10%-98%RH, accuracy ±2%RH). The hydrogen supply module 31 includes a high-pressure hydrogen storage cylinder, a pressure reducing valve, a mass flow controller, a hydrogen filter, and a check valve. The outlet of the high-pressure hydrogen storage cylinder is equipped with a pressure reducing valve and a mass flow controller in sequence. The supply port of the hydrogen supply module 31 is equipped with a hydrogen filter and a check valve in sequence to prevent impurities from entering the test chamber and to prevent hydrogen backflow.
[0036] Control Unit: PLC controller, data acquisition card, and alarm module. The data acquisition card synchronously collects data from temperature sensors, hydrogen concentration sensors, humidity sensors, and pressure sensors within the test chamber, with a sampling frequency of 10Hz. The PLC controller communicates with the hydrogen supply module 31 and the temperature and humidity control module 32 to control the operating status of each device based on the data from each sensor, ensuring that the environmental parameters within the test chamber remain consistent with preset values. The PLC controller can achieve coordinated control of the three parameters of "temperature-humidity-pressure." For example, during low-temperature cycling tests of the fuel cell stack, the PLC first controls the refrigeration unit to lower the temperature inside test chamber 1 to -40℃ and stabilize it for 30 minutes. Then, it raises the hydrogen pressure entering the stack to 150kPa through the hydrogen pressure reducing valve. After the pressure stabilizes, the cycling test begins. If the temperature fluctuation exceeds ±1℃ during the test, the PLC automatically adjusts the power of the refrigeration unit and compensates for the deviation in hydrogen pressure caused by temperature changes (the compensation coefficient is calculated based on the ideal gas law), ensuring a pressure control accuracy of ±0.2MPa. The alarm module is connected to the PLC controller. When any hydrogen concentration sensor detects that the hydrogen concentration reaches 1.0%VOL (gas volume percentage) (the preset first-level alarm threshold), the PLC controller controls the alarm module to issue an audible and visual alarm (alarm sound pressure level ≥85dB, alarm light flashing red), and at the same time automatically starts the cabin exhaust system (exhaust volume 1000m³ / h, explosion-proof fan); if the concentration rises to 4.0%VOL (second-level alarm threshold), the PLC controller immediately controls the valve of the hydrogen supply module to close, shuts down the temperature and humidity control module, activates the emergency pressure relief device (pressure relief rate 0.5m³ / s), and sends an alarm signal to the remote monitoring center.
[0037] Example 2
[0038] This utility model's high and low temperature test chamber can be applied to verify the environmental adaptability of battery components such as fuel cell stacks and membrane electrode assemblies, including: damp heat cycle durability testing (simulating the operating conditions of fuel cells in different climate zones, conducting alternating damp heat cycles within the range of -30℃ to 85℃ (e.g., freezing at -40℃ for 6 hours → operating at 85℃ / 95%RH for 4 hours), assessing the performance degradation rate of the fuel cell stack), and weathering resistance testing (for core materials such as proton exchange membranes and bipolar plate coatings, conducting accelerated aging tests under high temperature and high humidity (e.g., 135℃ / 95%RH). Through the integrated microstructure analysis interface, the surface roughness change and coating adhesion degradation of materials after 1000 cycles can be detected offline, providing data support for the selection of new endplate materials such as PPS).
[0039] This utility model's high and low temperature test chamber can be applied to the reliability verification of hydrogen fuel cell vehicle components, including: hydrogen safety simulation testing (according to GB / T 24549-2020 standard, a scaled-down vehicle cabin model is built inside the test chamber to simulate the hydrogen leakage and diffusion process under conditions such as -40℃ cold start and 50℃ high humidity. The concentration field distribution is tracked using a laser gas analyzer (positioning accuracy ±5cm), and the response effectiveness of the emergency shut-off device is verified by combining CFD fluid dynamics modeling (trigger delay <200ms required)); and hydrogen refueling system compatibility testing (temperature alternating shock tests are conducted on components such as the hydrogen refueling port and pressure sensor: while rapidly switching from -40℃ to 85℃ (temperature change rate ≥5℃ / min), the temperature field change is simulated at a hydrogen charging rate of 60g / s to verify the sealing performance of the material under the action of thermal cycling and high-pressure hydrogen coupling).
[0040] This utility model's high and low temperature test chamber can be applied to the performance evaluation of hydrogen energy infrastructure equipment. It conducts alternating high and low temperature tests ranging from -40℃ to 85℃ on key components such as hydrogen dispenser flow meters and valve assemblies, while simultaneously introducing a 90%RH high humidity environment to assess the insulation performance of electrical components. The test chamber must integrate explosion-proof video monitoring and emergency stop interlock devices to meet hydrogen-related requirements. It simulates the corrosive effects of trace impurities (such as CO and NH3) in hydrogen on hydrogen dispensing equipment under different humidity conditions (20%-90%RH), and optimizes equipment maintenance cycles through gravimetric analysis and corrosion product analysis.
[0041] In summary, the high and low temperature test chamber for hydrogen energy products of this invention effectively solves the safety hazards, accuracy deficiencies, and functional limitations of existing high and low temperature test chambers in the testing of hydrogen energy products. It achieves "safe, accurate, and compliant" testing of hydrogen energy products from components to systems, supporting product certification needs for large-scale applications in the hydrogen energy industry and providing a key testing tool for the research and development of next-generation hydrogen energy technologies. It possesses significant technical and industrial application value. The sealing reliability of the high and low temperature test chamber of this application is significantly improved, with a leakage rate ≤1×10⁻⁶. -9 Pa·m³ / s can meet the stringent requirement of "zero leakage" in long-term cyclic testing of hydrogen storage cylinders; the high explosion-proof rating can effectively reduce the probability of safety accidents.
[0042] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0044] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A high and low temperature test chamber for hydrogen energy products, characterized in that, include: The test chamber, control unit, detection unit installed inside the test chamber, and environmental parameter adjustment unit electrically connected to the inside of the test chamber; The test chamber includes an outer shell, an explosion-proof layer, a thermal insulation layer, and an inner box arranged from the outside to the inside. The test chamber is equipped with a hydrogen supply port, an air inlet, and an air outlet. The inner box is equipped with hydrogen pipelines. The detection unit includes a temperature sensor array, a humidity sensor array, a pressure sensor array, and a hydrogen concentration sensor array distributed on the inner box. The temperature sensor array, humidity sensor array, pressure sensor array, and hydrogen concentration sensor array are communicatively connected to the control unit. The environmental parameter adjustment unit includes a hydrogen supply module and a temperature and humidity control module. The hydrogen supply module is connected to a hydrogen pipeline through a hydrogen supply port, and the temperature and humidity control module is connected to an air inlet and an air outlet.
2. The high and low temperature test chamber for hydrogen energy products according to claim 1, characterized in that, The explosion-proof layer is a multi-layer welded stainless steel structure.
3. The high and low temperature test chamber for hydrogen energy products according to claim 1, characterized in that, The inner box contains a test frame made of titanium alloy, and the surface of the test frame is coated with a graphene nano-coating.
4. The high and low temperature test chamber for hydrogen energy products according to claim 1, characterized in that, The hydrogen pipeline interface uses a double compression fitting seal, and the surface of the hydrogen pipeline is wrapped with a PTFE insulation layer.
5. The high and low temperature test chamber for hydrogen energy products according to claim 1, characterized in that, The hydrogen supply module includes: a high-pressure hydrogen storage cylinder, a pressure reducing valve, a mass flow controller, a hydrogen filter, and a check valve. The pressure reducing valve and the mass flow controller are sequentially installed at the outlet of the high-pressure hydrogen storage cylinder, and the hydrogen filter and the check valve are installed at the supply port of the hydrogen supply module.
6. The high and low temperature test chamber for hydrogen energy products according to claim 1, characterized in that, The control unit includes a PLC controller and a data acquisition card. The data acquisition card is connected to a temperature sensor array, a humidity sensor array, a pressure sensor array, and a hydrogen concentration sensor array. The PLC controller is communicatively connected to the hydrogen supply module and the temperature and humidity control module.
7. The high and low temperature test chamber for hydrogen energy products according to claim 1, characterized in that, The hydrogen concentration sensor array includes several electrochemical hydrogen sensors, which are located at the top, middle, and bottom of the test chamber, as well as at the connection points of the hydrogen pipelines.
8. The high and low temperature test chamber for hydrogen energy products according to claim 1, characterized in that, The humidity sensor array includes several hydrogen-compatible capacitive humidity sensors, which are located at the top, middle, and bottom of the test chamber.
9. The high and low temperature test chamber for hydrogen energy products according to claim 1, characterized in that, The test chamber is equipped with an observation window, a test hole, and a pressure relief device. The connection between the observation window, the test hole, the pressure relief device, and the test chamber is statically sealed with a fluororubber sealing ring.