Special test system for fuel cell engine environment simulation

Abstract

The invention discloses a special test system for fuel cell engine environment simulation. The special test system comprises an environment bin and a test bench, the interior of the environment bin is divided into a normal-temperature area and a low-temperature area which are separated by a sealing plate; a control system, a fresh air system, a circulating heat exchange system, a high-altitude simulation system, a humidification system, a hydrogen detection system and a test system which are independent from one another are arranged outside the environment bin; the test system comprises a hydrogen supply system, a cooling system, an electronic load system, a tail exhaust system, a control system and other systems. According to the test system designed by the invention, parameters such as starting performance, steady-state working performance, safety, environmental adaptability and the like of the fuel cell engine can be conveniently tested, and various working performances of the fuel cell engine under vehicle conditions can be completely simulated in the test system; and the method has good practical application value and popularization significance.

Description

Technical Field

[0001] The invention relates to the technical field of fuel cell engine test systems, and in particular to a special test system for simulating fuel cell engine environment, which is mainly used for testing the performance of fuel cell engines in plateau, high and low temperature environments. Background Art

[0002] As the emissions from traditional internal combustion engine vehicles are increasingly causing air pollution and mineral energy is becoming increasingly scarce, countries around the world and major automobile companies have made the development of new energy a strategic goal. Everyone hopes that an environmentally friendly, energy-saving and efficient energy source can replace the current mineral energy source to achieve zero emissions from automobiles. Among them, fuel cells are one of the new clean energy sources that the world is currently paying attention to.

[0003] The testing technology of fuel cell engines is aimed at the development of fuel cell system platforms and complete vehicles. It carries out tests on basic system performance, durability performance evaluation, core component performance (fuel cell stack, controller, air compressor, etc.), temperature and humidity environmental adaptability, high altitude adaptability, and complete vehicle system testing and debugging related to fuel cell system components; examines the temperature and humidity adaptability and high altitude adaptability, electrical performance (start-up, rated / peak power, dynamic response characteristics, steady-state characteristics, emergency shutdown function, efficiency performance, etc.) and reliability (structural strength, durability characteristics, etc.) of fuel cell systems under various environments and working conditions, and forms relevant testing capabilities and testing methods to provide technical support for the optimization of power systems and complete vehicles. Fuel cell engines mainly include: fuel cell stacks, hydrogen supply systems, air supply systems, cooling water systems, electric power measurement systems, alarm systems, and controllers.

[0004] However, in recent years, countries have increasingly stringent environmental protection requirements, especially for the exhaust emissions of the automotive industry. Countries are paying more and more attention to finding a new efficient, clean, and environmentally friendly new energy technology. Fuel cell technology has been widely mentioned, and its technical application is also developing rapidly. Fuel cells are mainly a device that directly converts electrical energy through the chemical reaction of hydrogen and oxygen. They have broad application prospects in the fields of automobiles, aviation, navigation, and ships. Fuel cells produce water, and do not have pollutants such as nitrogen oxides, particulate matter, and carbon dioxide emitted by traditional fuel engine exhaust. They do not pollute the atmosphere and are an efficient and clean energy source.

[0005] Since the performance, reliability, safety, and environmental adaptability of fuel cell engines need to be tested, a test bench or test system is needed to test the various performance and reliability of fuel cell engines, including performance tests that include environmental adaptability tests at different altitudes.

[0006] The ordinary test system in the existing technology cannot be directly applied to the testing of fuel cell engines. Due to different working conditions and test requirements, there is an urgent need for a fuel cell engine plateau test system and the formulation of corresponding test methods, which is of great significance to improving the plateau adaptability of fuel cell engines. Summary of the invention

[0007] Based on this, it is necessary to provide a fuel cell engine environmental simulation test system to address the problem that the current existing test system cannot be applied to the testing work of fuel cell engines. The system can be used for various environmental test development and testing of fuel cell engine products to meet the needs of fuel cell vehicles working in different environmental cities.

[0008] The technical solution adopted by the present invention is as follows:

[0009] A fuel cell engine environment simulation test system, including an environment chamber and a test bench;

[0010] The interior of the environmental chamber is divided into a normal temperature zone and a low temperature zone, separated by a sealing plate;

[0011] The exterior of the environmental chamber includes independent control systems, fresh air systems, circulating heat exchange systems, high altitude simulation systems, humidification systems, hydrogen detection systems and test systems.

[0012] The test system includes hydrogen supply system, cooling system, electronic load system, tail exhaust system, control system and other systems.

[0013] As a further improvement of the above technical solution:

[0014] In one embodiment, the temperature of the normal temperature zone is different from that of the low temperature zone. During the normal temperature test, the pressure of the normal temperature zone is lower than the pressure of the low temperature zone.

[0015] In one embodiment, the outermost periphery of the environmental chamber is made of steel structure, and insulation panels are installed around the inner periphery of the steel structure.

[0016] In one of the embodiments, a pressure relief port is provided on the upper portion of the steel structure.

[0017] In one embodiment, the steel structure can withstand pressure at an altitude of 5000m.

[0018] In one of the embodiments, an explosion-proof pressure relief surface is provided on the top of the environmental chamber, and an explosion-proof observation window is provided on the bottom of the environmental chamber.

[0019] In one of the embodiments, a hydrogen concentration detector is also installed in the environmental chamber, and the hydrogen concentration detector communicates with the test system.

[0020] In one embodiment, the high altitude simulation system is implemented by using a negative pressure fan to extract the air in the environmental chamber. A hydrogen detector is installed on the negative pressure system. The hydrogen detector and the test system will alarm once the limit is exceeded. At the same time, the hydrogen detection system will be combined to shut down or alarm.

[0021] In one of the embodiments, the gas source provided by the hydrogen supply system is pure hydrogen of more than 99.99%. During the operation of the engine, the hydrogen at 35MPa of the hydrogen station is reduced to the pressure required by the engine through a pressure reducing valve. An emergency shut-off valve is added at the entrance of the hydrogen pipeline. Once the laboratory detects a hydrogen leak, the hydrogen alarm device will send a signal to the emergency shut-off valve to cut off the gas source to prevent the risk of explosion.

[0022] In one of the embodiments, the heat generated during the development of the fuel cell engine is taken away by a cooling system, which includes a fuel cell cooling system and a DCDC cooling system. The fuel cell cooling system is connected to the fuel cell engine, and the DCDC cooling system is connected to the fuel cell engine air compressor DCDC system. The generated heat is taken away by cooling water to ensure that the engine operates within a normal temperature range.

[0023] The beneficial effects of the present invention are as follows:

[0024] The test system designed by the present invention can conveniently test the starting performance, steady-state working performance, safety, environmental adaptability and other parameters of the fuel cell engine. The test system can fully simulate various working performances of the fuel cell engine under vehicle conditions, which has great practical application value and promotion significance.

[0025] The environmental chamber designed by the present invention is safer, and the external steel structure of the environmental chamber is installed with an explosion vent, which can ensure that the steel structure is not damaged when a danger occurs, reduce costs, and greatly improve the reliability and safety of the test.

[0026] The interior of the environmental chamber designed by the present invention is divided into two parts. The normal temperature area where the equipment is placed adopts a positive pressure design to ensure that the equipment can be used in non-explosion-proof conditions, thereby improving efficiency and reducing costs. At the same time, for greater safety, an air flow switch is installed on the air inlet duct and connected to the bench test system. Once the fresh air system fails, the signal is fed back to the system.

[0027] The hydrogen supply system and other system functions provided by the present invention are more complete, and can complete tasks such as environmental adaptability development that cannot be completed by the prior art. They are more practical and more comprehensive, and can adapt to all engine development tasks. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic diagram of the structure of the environmental chamber of the present invention.

[0029] FIG. 2 is a schematic diagram of the structure of the experimental test system of the present invention.

[0030] FIG3 is a schematic diagram of the external structure of the environmental chamber of the present invention.

[0031] FIG. 4 is a schematic diagram of the structure of the explosion vent of the present invention (closed state).

[0032] FIG. 5 is a schematic diagram of the structure of the explosion vent of the present invention (open state). DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0039] See also Figure 1 , Figure 1 The specific structural schematic diagram of the environmental chamber in one embodiment of the present invention is shown. The fuel cell engine environmental simulation test system of this embodiment includes two major parts: the environmental chamber and the test bench;

[0040] In order to simulate the test environment more realistically, the environment chamber is divided into a normal temperature zone and a low temperature zone, separated by a sealing plate in the middle;

[0041] In order to simulate the test environment more realistically, the exterior of the environmental chamber includes independent control systems, fresh air systems, circulating heat exchange systems, high altitude simulation systems, humidification systems, hydrogen detection systems and test systems.

[0042] In order to simulate the test environment more realistically, the test system includes a hydrogen supply system, a cooling system, an electronic load system, a tail exhaust system, a control system and other systems.

[0043] More specifically, the temperature of the normal temperature zone is different from that of the low temperature zone. During the normal temperature test, the pressure of the normal temperature zone is lower than that of the low temperature zone.

[0044] In order to simulate the test environment more realistically, the outermost perimeter of the environmental chamber is made of steel structure, and insulation panels are installed around the inner perimeter of the steel structure.

[0045] In order to simulate the test environment more realistically, a pressure relief port is provided on the upper part of the steel structure.

[0046] In order to simulate the test environment more realistically, the steel structure can withstand pressure at an altitude of 5000m.

[0047] In order to simulate the test environment more realistically, an explosion-proof pressure relief surface is set on the top of the environmental chamber, and an explosion-proof observation window is set on the bottom of the environmental chamber.

[0048] In order to simulate the test environment more realistically, a hydrogen concentration detector is also installed in the environmental chamber, and the hydrogen concentration detector communicates with the test system.

[0049] In order to simulate the test environment more realistically, the high altitude simulation system uses a negative pressure fan to extract the air in the environmental chamber. A hydrogen detector is installed on the negative pressure system. The hydrogen detector and the test system will alarm once the limit is exceeded. At the same time, the hydrogen detection system will be used to shut down or alarm.

[0050] In order to simulate the test environment more realistically, the gas source provided by the hydrogen supply system is more than 99.99% pure hydrogen. During the operation of the engine, the hydrogen is reduced from 35MPa at the hydrogen station to the pressure required by the engine through a pressure reducing valve. An emergency shut-off valve is added at the entrance of the hydrogen pipeline. Once the laboratory detects a hydrogen leak, the hydrogen alarm device will send a signal to the emergency shut-off valve to cut off the gas source to prevent the risk of explosion.

[0051] In order to simulate the test environment more realistically, the heat generated during the development of the fuel cell engine is taken away by the cooling system. The cooling system includes a fuel cell cooling system and a DCDC cooling system. The fuel cell cooling system is connected to the fuel cell engine, and the DCDC cooling system is connected to the fuel cell engine air compressor DCDC system. The generated heat is taken away by cooling water to ensure that the engine operates within a normal temperature range.

[0052] The specific structure and functions of the fuel cell engine environment simulation test system described in this embodiment are as follows:

[0053] It mainly consists of two parts: environmental chamber and test bench.

[0054] The environmental chamber contains a normal temperature zone and a low temperature zone, which are separated by a sealing plate. The temperatures of the two zones are different, but the pressure is the same during high-altitude tests. During normal temperature tests, the air supply of the fresh air system makes the pressure of the normal temperature zone about 50Pa lower than that of the low temperature zone. The purpose of this is to consider setting the normal temperature zone as a positive pressure room. The equipment placed in this area does not need to be explosion-proof equipment. Even if hydrogen leaks, the pressure in this area is high and the hydrogen will not reach the normal temperature zone.

[0055] The outermost perimeter of the environmental chamber is a steel structure, which is designed to withstand the pressure of 5000m above sea level. Insulation panels are installed around the steel structure to meet the temperature of -40~60 degrees Celsius. A pressure relief port is installed on the upper part of the steel shell. In order to withstand the pressure and temperature requirements, the steel shell structure is designed as a sealed hinged structure. It is usually closed. Once an explosion occurs, the pressure generated can open the pressure relief port to prevent the pressure from impacting the steel shell and causing damage to the steel shell. Once the steel shell is damaged, the entire environmental chamber cannot be repaired.

[0056] The exterior of the environmental chamber includes the control system, fresh air system, circulating heat exchange system, high altitude simulation system, humidification system, hydrogen detection system and test system of the environmental chamber.

[0057] Among them, the control system mainly controls the temperature, pressure, humidity of each device and the communication between various systems.

[0058] Among them, the fresh air system ensures that fresh air is delivered into the environmental chamber to meet the testing requirements of the fuel cell engine.

[0059] Among them, the circulating heat exchange system abandons the form of electric heating and adopts the form of coolant heating. The purpose of this is to be safer. In the form of electric heating, once hydrogen leaks, it is very easy to explode. At the same time, considering safety, the number of circulating air changes is increased and maintained at 12 times / h at all times, generally 6-8 times / h.

[0060] Among them, the high-altitude simulation system is realized by using a negative pressure fan to extract the air in the environmental chamber. A hydrogen detector is installed on the negative pressure system. The hydrogen detector and the test system will alarm once the limit is exceeded. At the same time, the hydrogen detection system will be combined to shut down or alarm.

[0061] Among them, the humidification system uses steam humidification to achieve the humidity requirements required for engine testing.

[0062] A hydrogen concentration detector is also installed in the environmental chamber, and the hydrogen concentration detector communicates with the test system.

[0063] The test system consists of a hydrogen supply system, a cooling system, an electronic load system, a tail exhaust system, a control system and other systems.

[0064] Among them, the hydrogen supply system adds an emergency shut-off valve at the entrance of the hydrogen pipeline. Once the laboratory detects a hydrogen leak, the hydrogen alarm device will feed back a signal to the emergency shut-off valve to cut off the gas source to prevent the risk of explosion. At the same time, the present invention adds a refrigeration function like the air supply system, which can provide hydrogen in a low-temperature environment to meet the development work of the engine in a low-temperature hydrogen environment. At the same time, this system has a nitrogen purge function, which can purge the hydrogen in the pipeline to the tail exhaust system to prevent residual hydrogen in the system, ensure safety, and meet the use requirements.

[0065] Specifically: the gas source provided by the hydrogen supply system is pure hydrogen of more than 99.99%. During the operation of the engine, the hydrogen is reduced to the pressure required by the engine through the pressure reducing valve from the 35MPa hydrogen in the hydrogen station. The hydrogen supply system provided by the present invention adds an emergency shut-off valve at the entrance of the hydrogen pipeline. Once the laboratory detects a hydrogen leak, the hydrogen alarm device will send a signal feedback to the emergency shut-off valve to cut off the gas source to prevent the risk of explosion. At the same time, the present invention adds a refrigeration function like the air supply system, which can provide hydrogen in a low-temperature environment to meet the development work of the engine in a low-temperature hydrogen environment. At the same time, the system has a nitrogen purge function, which can purge the hydrogen in the pipeline to the tail exhaust system to prevent residual hydrogen in the system and ensure safety.

[0066] The cooling system mainly includes a high-level water tank, a heat exchanger, a water pump, a proportional control valve and various valves and sensors. The temperature of the engine inlet sensor controls the heat exchange rate and the opening of the proportional control valve, thereby ensuring that the engine temperature is within the working range. The system has a simple structure and is easy to operate.

[0067] The heat generated during the development of the fuel cell engine is generally taken away by the cooling system. The cooling system generally includes a fuel cell cooling system and a DCDC cooling system. The fuel cell cooling system is connected to the fuel cell engine, and the DCDC cooling system is generally connected to the fuel cell engine air compressor DCDC system. The purpose is to take away the heat generated by it through cooling water to ensure that the engine works within a normal temperature range. The cooling system of the present invention mainly includes a high-level water tank, a heat exchanger, a water pump, a proportional control valve and various valves and sensors. The system controls the heat exchange and the opening of the proportional control valve through the engine inlet sensor temperature, thereby ensuring that the engine temperature is within the working range. The system structure is simple and easy to operate.

[0068] The tail exhaust system is mainly composed of a condenser, a fan and a hydrogen sensor. The condenser condenses and discharges water vapor in the engine exhaust. The hydrogen sensor mainly detects whether the hydrogen concentration in the exhaust reaches the lower explosion limit of hydrogen, preventing a large amount of hydrogen from being discharged and causing an explosion hazard. The electronic load system can provide the engine with the required starting power and absorb the power generated by the engine at work.

[0069] Specifically: The tail exhaust system of the present invention is mainly composed of a condenser, a fan and a hydrogen sensor. The condenser condenses and discharges the water vapor in the engine exhaust. The hydrogen sensor mainly detects whether the hydrogen concentration in the exhaust reaches the lower explosion limit of hydrogen. Exhausting a large amount of hydrogen will cause explosion danger. The system has a simple structure. By monitoring the hydrogen concentration, on the one hand, it can monitor the electrochemical reaction efficiency of the engine, and on the other hand, it can ensure that the engine works in a safe environment. When the hydrogen concentration reaches the set alarm value, the test bench will alarm, the hydrogen source emergency shut-off valve will work to cut off the hydrogen, and other systems will stop working to ensure safety.

[0070] Among them, the control system includes a host computer, a control cabinet, and a data acquisition module, which can collect the parameters and signals of each sensor and the functional operation of the system.

[0071] The electronic load system can provide the required starting power for the engine and absorb the power generated by the engine at the same time.

[0072] The control system includes a host computer, a control cabinet, and a data acquisition module, which can collect the parameters and signals of each sensor and the functional operation of the system.

[0073] Other systems described in the present invention include high and low voltage power supplies, power analyzers and ion devices. The high and low voltage power supplies provide power supply for the engine system and accessories; the power analyzer mainly measures the power distribution of the engine to the accessories, providing a better control strategy for engine development, and part of the effective power generated by the engine is used to output to the vehicle drive system.

[0074] The high altitude simulation system of this embodiment is realized by using a negative pressure fan to extract the air in the environmental chamber. A hydrogen detector is installed on the negative pressure system. The hydrogen detector and the experimental test system will alarm once the limit is exceeded. At the same time, the hydrogen detection system will be combined to shut down or alarm.

[0075] The gas source provided by the hydrogen supply system of this embodiment is pure hydrogen of more than 99.99%. During the operation of the engine, the hydrogen at 35MPa of the hydrogen station is reduced to the pressure required by the engine through a pressure reducing valve. An emergency shut-off valve is added at the entrance of the hydrogen pipeline. Once the laboratory detects a hydrogen leak, the hydrogen alarm device will send a signal to the emergency shut-off valve to cut off the gas source to prevent the risk of explosion.

[0076] The heat generated during the development of the fuel cell engine of this embodiment is taken away by the cooling system. The cooling system includes a fuel cell cooling system and a DCDC cooling system. The fuel cell cooling system is connected to the fuel cell engine, and the DCDC cooling system is connected to the fuel cell engine air compressor DCDC system. The generated heat is taken away by cooling water to ensure that the engine operates within a normal temperature range.

[0077] During the actual test, depending on the scenario, since each system is independent, simulation tests can be carried out one by one in various environments or occasions.

[0078] By utilizing the test system provided in this embodiment, in actual application, it is possible to very conveniently and perfectly test parameters such as the starting performance, steady-state operating performance, safety, and environmental adaptability of the fuel cell engine. The test system can fully simulate various operating performances of the fuel cell engine under vehicle conditions, and has great practical application value and promotion significance.

[0079] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A special test system for fuel cell engine environment simulation, characterized in that: It consists of two parts: environmental chamber and test bench; The interior of the environmental chamber is divided into a normal temperature zone and a low temperature zone, separated by a sealing plate; The exterior of the environmental chamber includes independent control systems, fresh air systems, circulating heat exchange systems, high altitude simulation systems, humidification systems, hydrogen detection systems and test systems. The test system includes hydrogen supply system, cooling system, electronic load system, tail exhaust system, control system and other systems.

2. A dedicated test system for fuel cell engine environment simulation according to claim 1, characterized in that: The temperatures in the normal temperature zone are different from those in the low temperature zone. During normal temperature testing, the pressure in the normal temperature zone is lower than that in the low temperature zone.

3. A dedicated test system for fuel cell engine environment simulation according to claim 1, characterized in that: The outermost perimeter of the environmental chamber is made of steel structure, and insulation panels are installed around the inside of the steel structure.

4. A dedicated test system for fuel cell engine environment simulation according to claim 3, characterized in that: A pressure relief port is provided on the upper part of the steel structure.

5. A dedicated test system for fuel cell engine environment simulation according to claim 4, characterized in that: The steel structure can withstand pressure at an altitude of 5000m.

6. A dedicated test system for fuel cell engine environment simulation according to claim 1, characterized in that: The environmental chamber is provided with an explosion-proof pressure relief surface on the top of the chamber, and an explosion-proof observation window is provided at the bottom of the environmental chamber.

7. A dedicated test system for fuel cell engine environment simulation according to claim 1, characterized in that: A hydrogen concentration detector is also installed in the environmental chamber, and the hydrogen concentration detector communicates with the test system.

8. A dedicated test system for fuel cell engine environment simulation according to claim 1, characterized in that: The high altitude simulation system is realized by using a negative pressure fan to extract the air in the environmental chamber. A hydrogen detector is installed on the negative pressure system. The hydrogen detector and the test system will alarm once the limit is exceeded. At the same time, the hydrogen detection system will be combined to shut down or alarm.

9. A dedicated test system for fuel cell engine environment simulation according to claim 1, characterized in that: The gas source provided by the hydrogen supply system is more than 99.99% pure hydrogen. During the operation of the engine, the hydrogen is reduced from 35MPa at the hydrogen station to the pressure required by the engine through a pressure reducing valve. An emergency shut-off valve is added at the entrance of the hydrogen pipeline. Once the laboratory detects a hydrogen leak, the hydrogen alarm device will send a signal to the emergency shut-off valve to cut off the gas source to prevent the risk of explosion.

10. A dedicated test system for fuel cell engine environment simulation according to claim 1, characterized in that: The heat generated during the development of the fuel cell engine is taken away by the cooling system. The cooling system includes a fuel cell cooling system and a DCDC cooling system. The fuel cell cooling system is connected to the fuel cell engine, and the DCDC cooling system is connected to the fuel cell engine air compressor DCDC system. The generated heat is taken away by cooling water to ensure that the engine operates within a normal temperature range.

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