A hydrogen fuel cell engine

Abstract

This application discloses a hydrogen fuel cell engine, including a fuel cell stack fixed to the upper surface of a support frame. The support frame is located at the lower end of the fuel cell stack, and a first end plate and a second end plate are located at the front and rear ends of the stack, respectively. A manifold assembly is arranged on the first end plate, and an air compressor controller is arranged on the second end plate. A DC-DC converter is arranged at the upper end of the fuel cell stack, and a hydrogen circulation pump controller and a fuel cell controller are arranged at the right end of the stack. An air compressor, an intercooler, a humidifier, an exhaust manifold, a cooling water inlet four-way integrated block, a water pump, an electronic thermostat, and a PTC heater are arranged on the lower surface of the support frame. A hydrogen circulation pump, a vapor-water separator, and a deionizer are arranged sequentially at the corners of the front and upper ends, the lower end, and the right end of the fuel cell stack. The hydrogen fuel cell engine provided in this application achieves a high overall system volumetric power density and improved vehicle compatibility through a reasonable structural design.

Description

Technical Field

[0001] This application relates to the field of engine technology, and in particular to a hydrogen fuel cell engine. Background Technology

[0002] Fuel cells are an advanced clean energy technology that directly converts chemical energy into electrical energy. Fuel cell power generation is the fourth type of power generation technology after hydropower, thermal power, and nuclear power. Since automobiles are mobile transportation vehicles, automotive fuel cells are required to have high energy density and the rapid start-up and power response capabilities necessary for vehicles. However, current hydrogen fuel cell engines suffer from a lack of reasonable layout design for components such as the air supply system, hydrogen supply system, and cooling system, resulting in a large overall size, affecting volumetric power density, and poor flexibility in matching different vehicle models. Summary of the Invention

[0003] In view of this, this application provides a hydrogen fuel cell engine that achieves a high overall volumetric power density and improved vehicle compatibility through a reasonable structural design.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A hydrogen fuel cell engine includes a fuel cell stack fixed to the upper surface of a support frame, the support frame being located at the lower end of the fuel cell stack, and a first end plate and a second end plate of the fuel cell stack being located at the front end and rear end of the fuel cell stack, respectively.

[0006] A manifold assembly is arranged on the side of the first end plate away from the second end plate. The manifold assembly includes an air inlet manifold, an air outlet manifold, a hydrogen inlet manifold, a hydrogen outlet manifold, a cooling water inlet manifold, and a cooling water outlet manifold.

[0007] An air compressor controller is arranged on the side of the second end plate away from the first end plate;

[0008] Hydrogen circulation pumps are arranged at the corners of the front and upper ends of the fuel cell stack, and a DC-DC converter is arranged at the upper end of the fuel cell stack near the second end plate.

[0009] A steam-water separator is arranged at the corners of the front and lower ends of the fuel cell stack. An air compressor, an intercooler, a humidifier, a tailpipe integrated pipe, a cooling water inlet four-way integrated block, a water pump, an electronic thermostat, and a PTC heater are arranged on the lower surface of the support frame.

[0010] Deionizers are arranged at the front end and right corner of the fuel cell stack, and a hydrogen circulation pump controller and a fuel cell controller are arranged at the right end of the fuel cell stack.

[0011] Optionally, the hydrogen fuel cell engine described above includes a main cooling water system and an auxiliary cooling water system. The main cooling water system includes a main cooling water inlet, a cooling water inlet four-way integrated block, a water pump, an electronic thermostat, a PTC heater, an intercooler, a deionizer, and a main cooling water outlet.

[0012] The main cooling water inlet is connected to the first interface of the cooling water inlet four-way integrated block, and the second interface of the cooling water inlet four-way integrated block is connected to the cooling water inlet gas distribution manifold through a silicone tube.

[0013] The cooling water outlet manifold is connected to the water pump via a silicone tube. The water pump is connected to the first end of the electronic thermostat via a silicone tube. The main cooling water outlet is connected to the second end of the electronic thermostat. The third end of the electronic thermostat is connected to the PTC heater via a silicone tube. The PTC heater is connected to the third interface of the cooling water inlet four-way integrated block via a silicone tube. The fourth interface of the cooling water inlet four-way integrated block is connected to the intercooler via a silicone tube. The intercooler is connected to the deionizer via a silicone tube. The deionizer is connected to the silicone tube between the cooling water outlet manifold and the water pump via a silicone tube.

[0014] The auxiliary cooling water system includes an auxiliary cooling water inlet and an auxiliary cooling water outlet. The auxiliary cooling water inlet is divided into two branches and connected to the water inlet of the DC-DC converter and the water inlet of the air compressor respectively through silicone tubes. The water outlet of the air compressor is connected to the water inlet of the air compressor controller through silicone tubes. The auxiliary cooling water outlet is divided into two branches and connected to the water outlet of the DC-DC converter and the water outlet of the air compressor controller respectively through silicone tubes.

[0015] Optionally, in the above-mentioned hydrogen fuel cell engine, a three-way valve, a first temperature sensor, and a first pressure sensor are installed on the air inlet manifold.

[0016] A second temperature sensor and a second pressure sensor are installed on the air outlet manifold.

[0017] The hydrogen inlet manifold is equipped with a proportional valve, a safety valve, and a third pressure sensor.

[0018] A third temperature sensor and a fourth pressure sensor are installed on the cooling water inlet manifold.

[0019] A fourth temperature sensor is installed on the cooling water outlet manifold.

[0020] Optionally, in the above-mentioned hydrogen fuel cell engine, the hydrogen inlet is connected to the hydrogen inlet manifold, and the safety valve is connected to the exhaust manifold via a silicone tube.

[0021] The steam-water separator is fixed to the hydrogen outlet manifold by bolts. The steam-water separator is connected to the hydrogen circulation pump through a silicone tube. The hydrogen circulation pump is connected to the hydrogen inlet manifold through a silicone tube. The steam-water separator is connected to the tailpipe integrated pipe through a silicone tube.

[0022] Optionally, in the above-mentioned hydrogen fuel cell engine, the stack is provided with a purge inlet and a purge outlet. The air inlet is connected to the air compressor through a silicone tube. The air compressor is connected to the air inlet of the intercooler through a silicone tube. The air outlet of the intercooler is divided into two paths and connected to the purge inlet and the dry air inlet of the humidifier through silicone tubes respectively. The dry air outlet of the humidifier is connected to the air inlet manifold of the stack through a silicone tube.

[0023] The air outlet manifold is connected to the humidified air inlet of the humidifier via a silicone tube, the humidified air outlet of the humidifier is connected to the throttle valve via a silicone tube, and the throttle valve is connected to the exhaust manifold via a flange connecting block.

[0024] The purge outlet is connected to the tailpipe integrated pipe via a silicone tube, and the solenoid valve exhaust port of the air inlet manifold is connected to the tailpipe integrated pipe via a silicone tube.

[0025] As can be seen from the above technical solution, in the hydrogen fuel cell engine provided in this application, the fuel cell stack is fixed to the upper surface of a support frame, which is located at the lower end of the fuel cell stack. The first end plate and the second end plate of the fuel cell stack are located at the front and rear ends of the fuel cell stack, respectively. The first end plate is equipped with a manifold assembly, and the second end plate is equipped with an air compressor controller. A DC-DC converter is arranged at the upper end of the fuel cell stack, and a hydrogen circulation pump controller and a fuel cell controller are arranged at the right end of the fuel cell stack. An air compressor, an intercooler, a humidifier, a tailpipe integrated pipe, a cooling water inlet four-way integrated block, a water pump, an electronic thermostat, and a PTC heater are arranged on the lower surface of the support frame. A hydrogen circulation pump, a gas-water separator, and a deionizer are arranged sequentially at the corners of the front and upper ends, the lower end, and the right end of the fuel cell stack. Through the above structural design, the air system, hydrogen system and cooling system can be integrated in a regular manner, avoiding the scattered layout of components, saving the length of connecting pipes and reducing the clutter of connecting pipes. Ultimately, the overall system volume is smaller and a higher volumetric power density is achieved. Moreover, since the hydrogen fuel cell engine of this application is smaller in size compared with systems of the same power, its vehicle compatibility is higher. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 This is a first-view isometric view (front end, lower end, and left end) of the hydrogen fuel cell engine provided in the embodiments of this application;

[0028] Figure 2 This is a second-view isometric view (rear end, lower end, and right end) of the hydrogen fuel cell engine provided in the embodiments of this application;

[0029] Figure 3 This is a bottom view (lower end) of the hydrogen fuel cell engine provided in the embodiments of this application.

[0030] The diagram is marked as follows:

[0031] 1. Air inlet manifold; 2. Air outlet manifold; 3. Hydrogen inlet manifold; 4. Hydrogen outlet manifold; 5. Cooling water inlet manifold; 6. Cooling water outlet manifold; 7. Air inlet; 8. Air outlet; 9. Hydrogen inlet; 10. Main cooling water inlet; 11. Main cooling water outlet; 12. Auxiliary cooling water inlet; 13. Auxiliary cooling water outlet; 14. Air compressor; 15. Intercooler; 16. 17. Humidifier; 18. Throttle valve; 19. Exhaust pipe; 20. Proportional valve; 21. Safety valve; 22. Gas-water separator; 23. Hydrogen circulation pump; 24. Cooling water inlet four-way integrated block; 25. Water pump; 26. Electronic thermostat; 27. PTC heater; 28. Deionizer; 29. ​​Air compressor controller; 30. DC-DC converter; 31. Hydrogen circulation pump controller; 32. Fuel cell controller. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] See Figures 1-3This application provides a hydrogen fuel cell engine, including a fuel cell stack fixed to the upper surface of a support frame. This support frame is connected to the vehicle body during vehicle assembly and primarily provides stable support for the fuel cell stack. The fuel cell stack lies horizontally on the support frame, i.e., the support frame is located at the lower end of the fuel cell stack. The first end plate and the second end plate of the fuel cell stack are located at the front and rear ends of the fuel cell stack, respectively. A manifold assembly is arranged on the outer side of the first end plate, i.e., the side of the first end plate away from the second end plate. This manifold assembly includes an air inlet manifold 1, an air outlet manifold 2, a hydrogen inlet manifold 3, a hydrogen outlet manifold 4, a cooling water inlet manifold 5, and a cooling water outlet manifold 6. An air compressor controller 28 is arranged on the outer side of the second end plate, i.e., the side of the second end plate away from the first end plate. A hydrogen circulation pump 22 is arranged at the corners of the front and upper ends of the fuel cell stack, and a DC-DC converter 29 is arranged at the upper end of the fuel cell stack near the second end plate. A gas-water separator 21 is arranged at the front and lower corners of the fuel cell stack. An air compressor 14, an intercooler 15, a humidifier 16, a tailpipe integrated pipe 18, a cooling water inlet four-way integrated block 23, a water pump 24, an electronic thermostat 25, and a PTC heater 26 are arranged on the lower surface of the support frame. A deionizer 27 is arranged at the front and right corners of the fuel cell stack. A hydrogen circulation pump controller 30 and a fuel cell controller 31 are arranged at the right end of the fuel cell stack. The fuel cell stack is where the chemical energy of hydrogen and oxygen is converted into electrical energy. The air compressor 14, intercooler 15, humidifier 16, exhaust manifold 18 (with an air outlet 8 at the end), air inlet manifold 1, and air outlet manifold 2 belong to the air system, primarily used to supply air to the fuel cell stack. The hydrogen circulation pump 22, steam-water separator 21, hydrogen inlet manifold 3, and hydrogen outlet manifold 4 belong to the hydrogen system, primarily used to supply hydrogen to the fuel cell stack. The water pump 24, electronic thermostat 25, PTC heater 26, deionizer 27, cooling water inlet manifold 5, and cooling water outlet manifold 6 belong to the cooling system, primarily used to dissipate heat from the fuel cell stack and other auxiliary components. Air inlet manifold 1 is connected to the air inlet on the first end plate, air outlet manifold 2 is connected to the air outlet on the first end plate, hydrogen inlet manifold 3 is connected to the hydrogen inlet on the first end plate, hydrogen outlet manifold 4 is connected to the hydrogen outlet on the first end plate, cooling water inlet manifold 5 is connected to the cooling water inlet on the first end plate, and cooling water outlet manifold 6 is connected to the cooling water outlet on the first end plate.Therefore, the hydrogen fuel cell engine of this application places the fuel cell stack at the center of the system, the main components of the hydrogen system at the front end, the main components of the air and cooling systems at the bottom, the control components of the hydrogen system and the fuel cell controller 31 at the right end, and the control components of the air system at the rear end. Electrical components such as the DC-DC converter 29 are placed at the top. This structural design allows for the orderly integration of the air, hydrogen, and cooling systems, avoiding scattered component placement, saving connection pipe length, and reducing the clutter of connection pipes. Ultimately, this results in a smaller overall system size and a higher volumetric power density. Moreover, because the hydrogen fuel cell engine of this application is smaller than systems of the same power, its vehicle compatibility is higher. It should be noted that the front and rear ends of the fuel cell stack mentioned above refer to the position of the end plate of the fuel cell stack. During vehicle assembly, the front end of the fuel cell stack can be aligned with or deviate from the forward direction of the vehicle body, i.e., the direction of travel during driving, and can be flexibly set as needed.

[0034] To better dissipate heat from the hydrogen fuel cell engine, in this embodiment, the cooling system includes a main cooling water system and a secondary cooling water system. The main cooling water system is used to dissipate heat from and heat the fuel cell stack, regulating its temperature. It includes a main cooling water inlet 10, a cooling water inlet four-way integrated block 23, a water pump 24, an electronic thermostat 25, a PTC heater 26, an intercooler 15, a deionizer 27, and a main cooling water outlet 11. The main cooling water inlet 10 is connected to the first interface of the cooling water inlet four-way integrated block 23. The second interface of the cooling water inlet four-way integrated block 23 is connected to the cooling water inlet manifold 5 via a silicone tube. The cooling water outlet manifold... Manifold 6 is connected to water pump 24 via silicone tubing. Water pump 24 is connected to the first end of electronic thermostat 25 via silicone tubing. Main cooling water outlet 11 is connected to the second end of electronic thermostat 25. The third end of electronic thermostat 25 is connected to PTC heater 26 via silicone tubing. PTC heater 26 is connected to the third interface of cooling water inlet four-way integrated block 23 via silicone tubing. The fourth interface of cooling water inlet four-way integrated block 23 is connected to intercooler 15 via silicone tubing. Intercooler 15 is connected to deionizer 27 via silicone tubing. Deionizer 27 is connected to the silicone tubing between cooling water outlet manifold 6 and water pump 24 via silicone tubing. Main cooling water inlet 10 and main cooling water outlet 11 are used to connect to other pipelines. PTC heater 26 can heat up the cooling system during low-temperature cold start. Water pump 24 is the "heart" of the hydrogen fuel cell thermal management system. It does work on the system coolant, driving the coolant to circulate in the cooling system pipeline, thereby achieving the functions of cooling the fuel cell stack and heating up during cold start. The electronic thermostat 25 controls the switching between the small and large circulation loops of the cooling system. The small circulation loop refers to the coolant from the water pump 24 flowing through the electronic thermostat 25 and the PTC heater 26 to the cooling water inlet four-way integrated block 23. The large circulation loop refers to the coolant from the water pump 24 flowing through the electronic thermostat 25 and the main cooling water outlet 11 to other components outside the hydrogen fuel cell engine's stack subsystem that require heat dissipation. The deionizer 27 reduces the conductivity of the coolant by absorbing anions and cations in the thermal management system piping, allowing the thermal management system to maintain a high level of insulation. The intercooler 15 is where the coolant and air exchange heat, cooling the high-temperature, high-pressure air from the air compressor 14 to ensure the air inlet temperature of the fuel cell stack remains within a suitable temperature range.

[0035] The auxiliary cooling water system is used to dissipate heat from the air compressor 14, air compressor controller 28, and DC-DC converter 29. It includes an auxiliary cooling water inlet 12 and an auxiliary cooling water outlet 13. The auxiliary cooling water inlet 12 is split into two branches, connected via silicone tubing to the inlet of the DC-DC converter 29 and the inlet of the air compressor 14, respectively. The outlet of the air compressor 14 is connected via silicone tubing to the inlet of the air compressor controller 28. The auxiliary cooling water outlet 13 is also split into two branches, connected via silicone tubing to the outlet of the DC-DC converter 29 and the outlet of the air compressor controller 28, respectively. The air compressor 14 pressurizes the air, providing sufficient pressure and flow rate of air to the fuel cell based on the output power of the fuel cell stack, thus meeting the fuel cell's oxygen requirements.

[0036] The fuel cell controller 31 is the "brain" of the hydrogen fuel cell engine, primarily responsible for online monitoring, real-time control, and fault diagnosis of the fuel cell system to ensure stable and reliable operation. The functions of the fuel cell controller 31 include gas path management, water and heat management, electrical management, communication functions, and fault diagnosis. To better enable the fuel cell controller 31 to function, in this embodiment, a three-way valve, a first temperature sensor, and a first pressure sensor are installed on the air inlet manifold 1; a second temperature sensor and a second pressure sensor are installed on the air outlet manifold 2; a proportional valve 19, a safety valve 20, and a third pressure sensor are installed on the hydrogen inlet manifold 3; a third temperature sensor and a fourth pressure sensor are installed on the cooling water inlet manifold 5; and a fourth temperature sensor is installed on the cooling water outlet manifold 6. All these temperature sensors, pressure sensors, proportional valve 19, and safety valve 20 are electrically connected to the fuel cell controller 31.

[0037] In one specific embodiment, the hydrogen inlet 9 is connected to the hydrogen inlet manifold 3, the safety valve 20 is connected to the tailpipe integrated pipe 18 via a silicone tube, and the vapor-liquid separator 21 is bolted to the hydrogen outlet manifold 4. The vapor-liquid separator 21 is also connected to the hydrogen circulation pump 22 via a silicone tube, which in turn is connected to the hydrogen inlet manifold 3. The vapor-liquid separator 21 is connected to the tailpipe integrated pipe 18 via a silicone tube. The vapor-liquid separator 21 is used to maintain reasonable water management within the system, ensuring that the water content within the proton exchange membrane of the fuel cell stack is within a reasonable range, and preventing liquid water within the fuel cell stack components from hindering the diffusion of reactant gases.

[0038] In one specific embodiment, the fuel cell stack is provided with a purge inlet and a purge outlet. Air inlet 7 is connected to air compressor 14 via a silicone tube. Air compressor 14 is connected to the air inlet of intercooler 15 via a silicone tube. The air outlet of intercooler 15 is split into two paths, connected to the purge inlet and the dry air inlet of humidifier 16 via silicone tubes respectively. The dry air outlet of humidifier 16 is connected to air inlet manifold 1 via a silicone tube. Air outlet manifold 2 is connected to the humidified air inlet of humidifier 16 via a silicone tube. The humidified air outlet of humidifier 16 is connected to throttle valve 17 via a silicone tube. Throttle valve 17 is connected to exhaust manifold 18 via a flange connecting block. The purge outlet is connected to exhaust manifold 18 via a silicone tube. The solenoid valve exhaust port of air inlet manifold 11 is connected to exhaust manifold 18 via a silicone tube. The humidifier 16 humidifies the dry air, keeping the proton exchange membrane inside the fuel cell stack well-hydrated, reducing the burden on hydrogen ion transport, and enhancing the output performance of the fuel cell. The throttle valve 17 is mainly used to control and regulate the air pressure.

[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hydrogen fuel cell engine characterized by, The stack is fixed to the upper surface of the support frame, the support frame is located at the lower end of the stack, and the first end plate and the second end plate of the stack are respectively located at the front end and the rear end of the stack; The side of the first end plate away from the second end plate is arranged with a manifold assembly, and the manifold assembly comprises an air inlet stack gas distribution manifold, an air outlet stack gas distribution manifold, a hydrogen inlet stack gas distribution manifold, a hydrogen outlet stack gas distribution manifold, a cooling water inlet stack gas distribution manifold and a cooling water outlet stack gas distribution manifold; The side of the second end plate away from the first end plate is arranged with an air compressor controller; The corner of the front end and the upper end of the stack is arranged with a hydrogen circulation pump, and the upper end of the stack is arranged with a DC-DC converter near the second end plate; The corner of the front end and the lower end of the stack is arranged with a steam-water separator, and the lower surface of the support frame is arranged with an air compressor, an intercooler, a humidifier, an exhaust integrated pipe, a cooling water inlet four-way integrated block, a water pump, an electronic thermostat and a PTC heater; The corner of the front end and the right end of the stack is arranged with a deionizer, and the right end of the stack is arranged with a hydrogen circulation pump controller and a fuel cell controller.

2. The hydrogen fuel cell engine of claim 1, wherein, The stack is fixed to the upper surface of the support frame, the support frame is located at the lower end of the stack, and the first end plate and the second end plate of the stack are respectively located at the front end and the rear end of the stack; The side of the first end plate away from the second end plate is arranged with a manifold assembly, and the manifold assembly comprises an air inlet stack gas distribution manifold, an air outlet stack gas distribution manifold, a hydrogen inlet stack gas distribution manifold, a hydrogen outlet stack gas distribution manifold, a cooling water inlet stack gas distribution manifold and a cooling water outlet stack gas distribution manifold; The side of the second end plate away from the first end plate is arranged with an air compressor controller; The corner of the front end and the upper end of the stack is arranged with a hydrogen circulation pump, and the upper end of the stack is arranged with a DC-DC converter near the second end plate; 3. The hydrogen fuel cell engine of claim 2, wherein, The corner of the front end and the lower end of the stack is arranged with a steam-water separator, and the lower surface of the support frame is arranged with an air compressor, an intercooler, a humidifier, an exhaust integrated pipe, a cooling water inlet four-way integrated block, a water pump, an electronic thermostat and a PTC heater; The corner of the front end and the right end of the stack is arranged with a deionizer, and the right end of the stack is arranged with a hydrogen circulation pump controller and a fuel cell controller. The stack is fixed to the upper surface of the support frame, the support frame is located at the lower end of the stack, and the first end plate and the second end plate of the stack are respectively located at the front end and the rear end of the stack; The side of the first end plate away from the second end plate is arranged with a manifold assembly, and the manifold assembly comprises an air inlet stack gas distribution manifold, an air outlet stack gas distribution manifold, a hydrogen inlet stack gas distribution manifold, a hydrogen outlet stack gas distribution manifold, a cooling water inlet stack gas distribution manifold and a cooling water outlet stack gas distribution manifold; The side of the second end plate away from the first end plate is arranged with an air compressor controller; The corner of the front end and the upper end of the stack is arranged with a hydrogen circulation pump, and the upper end of the stack is arranged with a DC-DC converter near the second end plate; The corner of the front end and the lower end of the stack is arranged with a steam-water separator, and the lower surface of the support frame is arranged with an air compressor, an intercooler, a humidifier, an exhaust integrated pipe, a cooling water inlet four-way integrated block, a water pump, an electronic thermostat and a PTC heater; The corner of the front end and the right end of the stack is arranged with a deionizer, and the right end of the stack is arranged with a hydrogen circulation pump controller and a fuel cell controller. The stack is fixed to the upper surface of the support frame, the support frame is located at the lower end of the stack, and the first end plate and the second end plate of the stack are respectively located at the front end and the rear end of the stack; The side of the first end plate away from the second end plate is arranged with a manifold assembly, and the manifold assembly comprises an air inlet stack gas distribution manifold, an air outlet stack gas distribution manifold, a hydrogen inlet stack gas distribution manifold, a hydrogen outlet stack gas distribution manifold, a cooling water inlet stack gas distribution manifold and a cooling water outlet stack gas distribution manifold; The side of the second end plate away from the first end plate is arranged with an air compressor controller; The corner of the front end and the upper end of the stack is arranged with a hydrogen circulation pump, and the upper end of the stack is arranged with a DC-DC converter near the second end plate; The corner of the front end and the lower end of the stack is arranged with a steam-water separator, and the lower surface of the support frame is arranged with an air compressor, an intercooler, a humidifier, an exhaust integrated pipe, a cooling water inlet four-way integrated block, a water pump, an electronic thermostat and a PTC heater; The corner of the front end and the right end of the stack is arranged with a deionizer, and the right end of the stack is arranged with a hydrogen circulation pump controller and a fuel cell controller. The cooling water inlet manifold is provided with a third temperature sensor and a fourth pressure sensor; The cooling water outlet manifold is provided with a fourth temperature sensor.

4. The hydrogen fuel cell engine of claim 3, wherein, The hydrogen inlet is connected to the hydrogen inlet manifold, and the safety valve is connected to the tail exhaust integrated pipe through a silica gel pipe; The steam-water separator is fixed to the hydrogen outlet manifold by bolts, and is connected to the hydrogen circulating pump, the hydrogen inlet manifold and the tail exhaust integrated pipe through silica gel pipes.

5. The hydrogen fuel cell engine of claim 4, wherein, The air inlet is connected to the air compressor through a silica gel pipe, the air compressor is connected to the air inlet of the intercooler through a silica gel pipe, the air outlet of the intercooler is divided into two paths and is connected to the purge inlet and the dry air inlet of the humidifier through silica gel pipes, and the dry air outlet of the humidifier is connected to the air inlet manifold through a silica gel pipe. The air outlet manifold is connected to the wet air inlet of the humidifier through a silica gel pipe, the wet air outlet of the humidifier is connected to the throttle valve through a silica gel pipe, the throttle valve is connected to the tail exhaust integrated pipe through a flange connection block, and the purge outlet is connected to the tail exhaust integrated pipe through a silica gel pipe. The air inlet manifold is provided with an electromagnetic valve exhaust port connected to the tail exhaust integrated pipe through a silica gel pipe.

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