A marine hydrogen fuel cell power generation system and control method

Abstract

The present invention provides a marine hydrogen fuel cell power generation system and control method. The system includes a hydrogen subsystem and an integrated system. The integrated system includes a fuel cell stack module, an air subsystem, a thermal management subsystem, and an electrical control subsystem. The hydrogen subsystem provides hydrogen to the fuel cell stack module through a double-walled pipe and recycles the residual hydrogen discharged from the fuel cell stack module. The present invention adopts a system architecture with dual humidification of air and hydrogen, adopts a highly secure and reliable connection form for hydrogen-related systems or components, and combines it with dynamic monitoring of hydrogen emission concentration detection to improve the safety of the power generation system. At the same time, the system is matched with air filters suitable for various environments, and a special operating space design is carried out for regularly maintained components, thereby improving the reliability and maintainability of the electrical system.

Description

Technical Field

[0001] The present invention relates to the field of fuel cell technology, and more particularly to a marine hydrogen fuel cell power generation system and a control method. Background Art

[0002] Currently, ships primarily rely on marine diesel engines for power. These engines face numerous challenges, including low fuel-to-energy conversion efficiency, high vibration and noise levels, high levels of pollutant emissions, and significant exposure to fluctuations in fossil fuel prices. These challenges also exacerbate the depletion of oil resources and the deterioration of the ecological environment. Therefore, research into clean, efficient, and sustainable new energy propulsion technologies has become a key development direction for green ships. Marine electric propulsion technology is a key area of ​​current green ship development and is attracting widespread attention in both military and civilian applications.

[0003] Fuel cells have the advantages of high energy density, high energy conversion efficiency, low noise, high system power, environmental friendliness, outdoor use and low-temperature start-up. They are suitable for distributed power generation systems, composite energy systems, and key application areas such as automotive power. Fuel cell systems designed based on ship specifications have good adaptability to ship scenarios and can also be said to be suitable for development as ship energy supply systems.

[0004] A hydrogen fuel cell (PEMFC) power generation system generally consists of a fuel cell stack module, a hydrogen subsystem, an air subsystem, a hydrothermal management subsystem, and a control subsystem. The fuel cell stack is the core of the system, responsible for converting chemical energy into electrical energy. The hydrogen subsystem is responsible for providing the hydrogen required for normal operation of the fuel cell stack. The air subsystem provides the air required for normal fuel cell operation. The hydrothermal management subsystem ensures the temperature and humidity of the air and hydrogen required by the fuel cell stack, ensuring the stack operates at normal temperature and humidity. The control system uses signals detected by sensors and a specific control strategy to ensure normal system operation and the execution of specified actions on demand.

[0005] At present, hydrogen fuel cell power generation systems are often used in marine applications in the form of independent cabins or packaged as a whole. Each hydrogen-related component requires a separate explosion-proof design, which leads to complex system connection pipelines and difficulty in designing the physical connection components between pipelines. As a result, the existing hydrogen fuel cell power generation system is too heavy, which limits its application in the marine field. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, this application provides a marine hydrogen fuel cell power generation system. The present invention not only can perform real-time data detection on the system, but also can specifically design the operating space of the hydrogen fuel cell power generation system to meet the practical needs of marine applications.

[0007] The technical means adopted in the present invention are as follows:

[0008] A marine hydrogen fuel cell power generation system includes a hydrogen subsystem and an integrated system, wherein the integrated system includes a fuel cell stack module, an air subsystem, a thermal management subsystem, and an electrical control subsystem;

[0009] The hydrogen subsystem provides hydrogen to the fuel cell stack module through a double-walled pipe and recycles the residual hydrogen discharged from the fuel cell stack module;

[0010] The hydrogen subsystem is arranged at a position higher than the integrated system.

[0011] Furthermore, the hydrogen subsystem includes a hydrogen supply valve group, a hydrogen circulation pump, an exhaust solenoid valve, a hydrogen concentration sensor, a hydrogen high-pressure pressure sensor, and a hydrogen low-pressure pressure sensor;

[0012] The hydrogen supply valve group is arranged on the hydrogen input pipeline of the hydrogen subsystem to deliver hydrogen to the hydrogen inlet of the fuel cell stack module. The hydrogen circulation pump is arranged on the recovery pipeline of the hydrogen subsystem to collect the hydrogen discharged from the fuel cell stack module.

[0013] The hydrogen high-pressure sensor and the hydrogen low-pressure sensor are respectively arranged on the hydrogen input pipeline and the recovery pipeline, and the output end of each sensor is respectively connected to the collection end of the controller.

[0014] The hydrogen concentration sensor is used to detect the hydrogen concentration inside the hydrogen subsystem.

[0015] Furthermore, the air subsystem includes an air filter, an air compressor, an intercooler, a humidifier, an air pressure regulating valve and a bypass valve;

[0016] The output end of the intercooler is connected to the ventilation duct inlet of the fuel cell stack module on one hand, and is connected to the humidifier on the other hand, and the humidifier is connected in parallel with a bypass valve;

[0017] The air filter comprises a desalting mist module and a chemical filtration air filter. The desalting mist module has a filtration efficiency of not less than 90% for salt nuclei with a particle size of 1-10 microns.

[0018] Furthermore, the air subsystem also delivers air to the ventilation duct inlet of the fuel cell stack module for primary ventilation, and the ventilation duct outlet of the fuel cell stack module delivers air to the ventilation duct inlet of the hydrogen subsystem for secondary ventilation.

[0019] Furthermore, the first input end of the humidifier is connected to the output end of the intercooler, the first output end is connected to the air intake regulating pipeline of the fuel cell stack module, the second input end is connected to the air outlet regulating pipeline of the fuel cell stack module; and the second output end is connected to the atmosphere through an exhaust pipeline;

[0020] Air pressure regulating valves are provided on both the air inlet regulating pipeline and the air outlet regulating pipeline of the fuel cell stack module.

[0021] Furthermore, the electrical control subsystem includes: a controller, an air temperature and pressure sensor, a coolant temperature and pressure sensor, a low-voltage wiring harness, a high-voltage wiring harness, a hydrogen concentration sensor, a coolant conductivity meter, an insulation tester, and an all-in-one DCDC;

[0022] The output ends of the air temperature and pressure sensor, coolant temperature and pressure sensor, hydrogen concentration sensor, coolant conductivity meter, and insulation tester are all connected to the input end of the controller;

[0023] The hydrogen concentration sensor includes at least a stack module hydrogen concentration sensor, an air exhaust hydrogen concentration sensor, and a hydrogen concentration sensor connected to the main water tank. Furthermore, the system includes a TBOX unit, which is connected to the electrical control subsystem and wirelessly communicates via a GPRS module, enabling remote communication and data storage.

[0024] Furthermore, the integrated system further comprises a system cover, on which an observation window, a maintenance hole group, an exhaust fan and a wall plug-in group are provided.

[0025] Furthermore, the thermal management subsystem includes a water pump, a thermostat, a PTC heater, a deionizer, a filter, and a main water tank with liquid level detection;

[0026] The maintenance hole group is arranged on the system cover at positions corresponding to the deionizer and the filter.

[0027] The present invention also provides a method for controlling a marine hydrogen fuel cell power generation system, which is characterized by comprising the following steps:

[0028] The electrical control subsystem monitors the operating status of the marine hydrogen fuel cell power generation system and initiates an emergency shutdown when at least one safety indicator is detected to be abnormal. The safety indicators include hydrogen concentration, system insulation value, air / hydrogen pressure, and communication indicators.

[0029] When at least one stability indicator is detected to be abnormal, the electrical control subsystem is used to reduce load and shut down. The stability indicators include the water outlet temperature of the fuel cell stack module, the consistency deviation of the single cell voltage of the fuel cell stack module, and the output current of the fuel cell stack.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] This invention utilizes a dual-humidification system architecture for air and hydrogen, implemented through a separate design of the hydrogen subsystem and an integrated system. Highly secure and reliable connections are employed for hydrogen-related systems and components, combined with dynamic monitoring of hydrogen emission concentrations to enhance the safety of the electrical system. Furthermore, the system incorporates air filters suitable for various environments and features a dedicated access space for regularly maintained components, enhancing the reliability and maintainability of the electrical system.

[0032] Based on the above reasons, the present invention can be widely promoted in the field of fuel cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0034] Figure 1 This is a structural block diagram of a marine hydrogen fuel cell power generation system according to the present invention.

[0035] Figure 2 This is a physical connection diagram of the fuel cell stack module and the hydrogen subsystem of the present invention.

[0036] Figure 3 Schematic diagram of the air subsystem structure of the present invention.

[0037] Figure 4 This is a schematic diagram of the thermal management subsystem structure of the present invention.

[0038] Figure 5 Schematic diagram of the hydrogen subsystem structure of the present invention.

[0039] In the figure, 1. Fuel cell stack module; 1.1. Sealed box; 1.2. Fuel cell stack; 1.3. Inspection unit; 1.4. Purge unit; 1.5. Low-voltage unit; 1.6. High-voltage output unit;

[0040] 2. Air subsystem; 2.1. Air filter; 2.1.1. Desalting module; 2.1.2. Chemical air filter; 2.2. Air compressor; 2.3. Intercooler; 2.4. Humidifier; 2.5. Air pressure regulating valve; 2.6. Bypass valve;

[0041] 3. Thermal management subsystem; 3.1. Water pump; 3.2. Thermostat; 3.3. PTC heater; 3.4. Deionizer; 3.5. Filter; 3.6. Main water tank with liquid level detection;

[0042] 4. Hydrogen subsystem; 4.1. Hydrogen supply valve group; 4.2. Hydrogen circulation pump; 4.3. Gas-liquid separator; 4.4. Exhaust solenoid valve; 4.5. Check valve; 4.6. Hydrogen concentration sensor; 4.7. Hydrogen high-pressure sensor; 4.8. Hydrogen low-pressure sensor;

[0043] 5. Electrical control subsystem; 5.1. Controller; 5.2. Air temperature and pressure sensor; 5.3. Coolant temperature and pressure sensor; 5.4. Low-voltage wiring harness; 5.5. High-voltage wiring harness; 5.6. Hydrogen concentration sensor; 5.7. Coolant conductivity meter; 5.8. Insulation tester; 5.9. All-in-one DC-DC converter;

[0044] 6. TBOX unit;

[0045] 7. System cover; 7.1. Observation window; 7.2. Maintenance hole assembly; 7.3. Exhaust fan; 7.4. Wall plug assembly; DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0047] like Figure 1-5As shown, the present invention provides a marine hydrogen fuel cell power generation system, comprising: a hydrogen subsystem and an integrated system. The integrated system mainly includes a fuel cell stack module, an air subsystem, a thermal management subsystem and an electrical control subsystem. When the power generation system is working, the hydrogen subsystem provides hydrogen to the fuel cell stack module through a double-walled pipe, and recovers the residual hydrogen discharged from the fuel cell stack module. The hydrogen subsystem 4 is arranged at a position higher than the integrated system. The hydrogen subsystem 4 is relatively independent, and the other components of the marine hydrogen fuel cell power generation system are an integrated body. All components within the hydrogen subsystem are hydrogen-related components, and making them an independent design has the following advantages: ① For overall ventilation, it is no longer necessary to prepare explosion-proof treatment for each component of the hydrogen fuel cell power generation system, reducing the difficulty of component design, especially for pipeline connections. ② The air used for ventilation of the fuel cell module can be connected in series with the overall ventilation, which improves the design difficulty of the ventilation pipeline and is beneficial to the weight reduction and physical connection of the system. ③ The hydrogen subsystem needs to have a large hydrogen return flow and the ability to reduce the introduction of liquid water into the stack inlet. Through the overall independent design, it is placed above the fuel cell stack module, which is the best configuration and can solve the above problems.

[0048] The fuel cell stack module 1 includes a sealed housing 1.1, which houses a fuel cell stack 1.2, an inspection unit 1.3, a purge unit 1.4, a low-voltage unit 1.5, and a high-voltage output unit 1.6. The inspection unit is capable of detecting fuel cell cell voltages with an accuracy of ±5mV, a communication frequency of 10ms, and an inspection cycle of 100ms. The purge unit integrates the fuel cell stack module 1 and ventilation-related piping components. This unified connection ensures effective purge control within the stack module to prevent the accumulation of liquid droplets or hydrogen-containing gases.

[0049] like Figure 3 As shown, the air subsystem 2 includes an air filter 2.1, an air compressor 2.2, an intercooler 2.3, a humidifier 2.4, an air pressure regulating valve 2.5, and a bypass valve 2.6. The output end of the intercooler is connected to the ventilation duct inlet of the fuel cell stack module on one hand, and to the humidifier on the other hand, and the humidifier is connected in parallel with a bypass valve. The first input end of the humidifier is connected to the output end of the intercooler, the first output end is connected to the air intake regulating pipeline of the fuel cell stack module, the second input end is connected to the air outlet regulating pipeline of the fuel cell stack module, and the second output end is connected to the atmosphere through the exhaust pipeline. Preferably, an air pressure regulating valve is provided on both the air intake regulating pipeline and the air outlet regulating pipeline of the fuel cell stack module. In a preferred embodiment of the present invention, the air subsystem delivers air to the ventilation duct inlet of the fuel cell stack module for primary ventilation, and the ventilation duct outlet of the fuel cell stack module delivers air to the ventilation duct inlet of the hydrogen subsystem for secondary ventilation.

[0050] like Figure 4 As shown, the thermal management subsystem 3 includes a water pump 3.1, a thermostat 3.2, a PTC heater 3.3, a deionizer 3.4, a filter 3.5, and a main water tank 3.6 with liquid level detection;

[0051] like Figure 5 As shown, the hydrogen subsystem 4 includes a hydrogen supply valve group 4.1, a hydrogen circulation pump 4.2, a gas-liquid separator 4.3, an exhaust solenoid valve 4.4, a one-way valve 4.5, a hydrogen concentration sensor 4.6, a hydrogen high-pressure pressure sensor 4.7, and a hydrogen low-pressure pressure sensor 4.8. The hydrogen supply valve group is arranged on the hydrogen input pipeline of the hydrogen subsystem to transport hydrogen to the hydrogen inlet of the fuel cell stack module. The hydrogen circulation pump is arranged on the recovery pipeline of the hydrogen subsystem to collect the hydrogen discharged from the fuel cell stack module. The hydrogen concentration sensor, hydrogen high-pressure pressure sensor, and hydrogen low-pressure pressure sensor are respectively arranged on the hydrogen input pipeline and recovery pipeline, and the output end of each sensor is connected to the collection end of the controller. Specifically, the components of the hydrogen subsystem 4, such as the hydrogen supply valve assembly 4.1, hydrogen circulation pump 4.2, exhaust solenoid valve 4.4, hydrogen concentration detector 4.6, hydrogen high-pressure pressure sensor 4.7, and hydrogen low-pressure pressure sensor 4.8, are all explosion-proof devices that meet hydrogen-related requirements. The piping connections used in the hydrogen subsystem 4 are preferably stainless steel ferrule connections or welding, but silicone tube connections can also be used. Regardless of the connection method, the sealed box 4.9 containing the hydrogen subsystem 4 must be ventilated. In a preferred embodiment of the present invention, the ventilation air for the sealed box 4.9 and the ventilation air used by the double-walled pipe 4.10 can be from the same source.

[0052] The electrical control subsystem 5 includes a controller 5.1, an air temperature and pressure sensor 5.2, a coolant temperature and pressure sensor 5.3, a low-voltage wiring harness 5.4, a high-voltage wiring harness 5.5, a hydrogen concentration sensor 5.6, a coolant conductivity meter 5.7, an insulation tester 5.8, and an all-in-one DC / DC converter 5.9. These components are distributed throughout the hydrogen fuel cell power generation system, interconnected by low-voltage wiring harnesses 5.4 and high-voltage wiring harnesses 5.5. As the core processing unit, the controller processes all feedback information and issues control commands, enabling the system to operate smoothly and recording fault information. It also maintains smooth communication with the TBOX unit.

[0053] TBOX unit 6 performs wireless communication via GPRS module, performing remote communication connection and data storage;

[0054] The system cover 7 has the ability to prevent foreign objects from entering, and is provided with an observation window 7.1, a maintenance hole group 7.2, an exhaust fan 7.3, and a wall plug group 7.4.

[0055] As a preferred embodiment of the present invention, the fuel cell stack module 1 is located at the core of the entire system. It is connected and fixed to the air subsystem 2, thermal management subsystem 3, electrical control subsystem 5, TBOX unit 6, system cover 7, etc. through frame or bracket parts. The fresh hydrogen and exhaust hydrogen mixture required by the fuel cell stack module 1 are provided and received by the hydrogen subsystem 4. The fresh air and exhaust air required by the fuel cell stack module 1 are provided and received by the air subsystem 2; the coolant required by the fuel cell stack module 1 is provided by the thermal management subsystem 3.

[0056] In the present invention, a marine hydrogen fuel cell power generation system is fully monitored and controlled by an electrical control subsystem 5. Specifically, the controller 5.1 has multi-channels, is compatible with multiple types of signals, and has the ability to perform multi-functional operations and control outputs. Preferably, there are no less than three hydrogen concentration sensors 5.6, which monitor the hydrogen concentration inside the stack module, the air tail exhaust, and the main water tank respectively. The coolant conductivity meter 5.7 is used to monitor the real-time conductivity of the coolant. The insulation tester 5.8 is used to monitor the real-time insulation value of a marine hydrogen fuel cell power generation system described in the present invention. When an abnormality is found and judged in the data monitored by the electrical control subsystem 5, a hierarchical disposal method is selected according to the control strategy, specifically load reduction shutdown or emergency shutdown, and also includes triggering a safety alarm.

[0057] In addition, the overall ventilation of the marine hydrogen fuel cell power generation system is provided by exhaust fan 7.3.

[0058] Preferably, ventilation for the fuel cell stack module 1 is provided by the air subsystem 2. Specifically, a portion of the exhaust air from the air compressor is introduced through appropriately sized pipes to ventilate the fuel cell stack module 1. This design reduces the need for an external independent air source, saving costs while also facilitating connection and reducing space requirements for piping design, making it a preferred option.

[0059] Preferably, ventilation for the hydrogen subsystem 4 and the double-walled pipe 4.10 can also be provided by the air subsystem 2, specifically connected to the ventilation outlet of the fuel cell stack module 1 or physically connected in parallel with the ventilation structure of the fuel cell stack module 1. This combined gas path saves costs while also facilitating connection and reducing space requirements for piping design, making it a preferred solution.

[0060] As a preferred embodiment of the present invention, the thermal management subsystem 3 is designed with a maintenance port group 7.2 located around the ionizer 3.4 and filter 3.5 in the system housing 7 for easy maintenance. These components can be removed by opening the maintenance ports. The main water tank 3.6 with liquid level detection can be refilled with coolant through the maintenance port group 7.2.

[0061] As a preferred embodiment of the present invention, air filter 2.1, when used in marine environments, consists of two components: a desalting module 2.1.1 and a chemical air filter 2.1.2. For general inland lake applications, only chemical air filter 2.1.2 is included. Desalting module 2.1.1 is capable of removing salt mist particles, achieving a filtration efficiency of at least 90% for salt nuclei with a size of 1-10 microns.

[0062] The component cooling capacity required by the marine hydrogen fuel cell power generation system of the present invention is provided by external equipment. Specifically, since the air compressor, air compressor controller, intercooler, and all-in-one DC / DC unit in the marine hydrogen fuel cell power generation system are all heat-generating components, cooling is required to ensure reliable performance. The connecting piping for these components is already established in the present invention. For installation and use, the system can be connected to a vessel-provided water pump and heat sink. This heat sink is typically a corrosion-resistant plate heat exchanger.

[0063] Further preferably, all physical interfaces of the marine hydrogen fuel cell power generation system in the present application are oriented in the same direction, so that they can be connected in series to form a power generation unit with higher power.

[0064] The present invention also discloses a method for controlling a marine hydrogen fuel cell power generation system, comprising the following steps:

[0065] S1. Monitor the operating status of the marine hydrogen fuel cell power generation system through the electrical control subsystem and initiate an emergency shutdown through the electrical control subsystem when at least one safety indicator is detected to be abnormal. The safety indicators include hydrogen concentration, system insulation value, air / hydrogen pressure, and communication indicators.

[0066] S2. When at least one stability indicator is detected to be abnormal, the electrical control subsystem is used to reduce load and shut down the system. The stability indicators include the water outlet temperature of the fuel cell stack module, the consistency deviation of the single cell voltage of the fuel cell stack module, and the output current of the fuel cell stack.

[0067] Specifically, when the marine hydrogen fuel cell power generation system detects items related to the safety of the hydrogen fuel cell power generation system and fuel cell stack modules through the electrical control subsystem, an emergency shutdown is triggered, such as excessive hydrogen concentration, low system insulation value, excessively high fuel cell stack module water outlet temperature, excessively high air / hydrogen pressure, low fuel cell stack module cell voltage, excessively high fuel cell stack module cell voltage consistency, or communication anomalies. When the hydrogen concentration exceeds the standard or the system insulation value is too low, a safety alarm is triggered. This alarm device is usually placed in the cab and is in the form of simultaneous audible and visual alarms. Under other conditions, the hydrogen fuel cell power generation system is allowed to be restarted a second time. When the marine hydrogen fuel cell power generation system detects items that affect the operational stability of the fuel cell system and fuel cell stack modules through the electrical control subsystem, a load reduction shutdown is triggered, such as when the fuel cell stack module water outlet temperature exceeds the alarm value, the fuel cell stack module cell voltage consistency deviation is large, or the fuel cell stack output current exceeds the limit.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A marine hydrogen fuel cell power generation system, characterized in that: It includes a hydrogen subsystem and an integrated system, wherein the integrated system includes a fuel cell stack module, an air subsystem, a thermal management subsystem and an electrical control subsystem; The hydrogen subsystem provides hydrogen to the fuel cell stack module through a double-walled pipe and recycles the residual hydrogen discharged from the fuel cell stack module; The hydrogen subsystem is arranged at a position higher than the integrated system; The hydrogen subsystem includes a hydrogen supply valve group, a hydrogen circulation pump, an exhaust solenoid valve, a hydrogen concentration sensor, a hydrogen high-pressure pressure sensor, and a hydrogen low-pressure pressure sensor; The hydrogen supply valve group is arranged on the hydrogen input pipeline of the hydrogen subsystem to deliver hydrogen to the hydrogen inlet of the fuel cell stack module. The hydrogen circulation pump is arranged on the recovery pipeline of the hydrogen subsystem to collect the hydrogen discharged from the fuel cell stack module. The hydrogen high-pressure sensor and the hydrogen low-pressure sensor are respectively arranged on the hydrogen input pipeline and the recovery pipeline, and the output end of each sensor is respectively connected to the collection end of the controller; The hydrogen concentration sensor is used to detect the hydrogen concentration inside the hydrogen subsystem; The air subsystem includes an air filter, an air compressor, an intercooler, a humidifier, an air pressure regulating valve and a bypass valve; The output end of the intercooler is connected to the ventilation duct inlet of the fuel cell stack module on one hand, and is connected to the humidifier on the other hand, and the humidifier is connected in parallel with a bypass valve; The air filter includes a desalting module and a chemical filtration air filter, and the desalting module has a filtration efficiency of not less than 90% for salt nuclei with a particle size of 1-10 microns; The air subsystem also delivers air to the ventilation duct inlet of the fuel cell stack module for primary ventilation, and the ventilation duct outlet of the fuel cell stack module delivers air to the ventilation duct inlet of the hydrogen subsystem for secondary ventilation.

2. A marine hydrogen fuel cell power generation system according to claim 1, characterized in that: The first input end of the humidifier is connected to the output end of the intercooler, the first output end is connected to the air intake regulating pipeline of the fuel cell stack module, and the second input end is connected to the air outlet regulating pipeline of the fuel cell stack module; the second output end is connected to the atmosphere through the exhaust pipeline; Air pressure regulating valves are provided on both the air inlet regulating pipeline and the air outlet regulating pipeline of the fuel cell stack module.

3. A marine hydrogen fuel cell power generation system according to claim 1, characterized in that: The electrical control subsystem includes: a controller, an air temperature and pressure sensor, a coolant temperature and pressure sensor, a low-voltage wiring harness, a high-voltage wiring harness, a hydrogen concentration sensor, a coolant conductivity meter, an insulation tester, and an all-in-one DCDC; The output ends of the air temperature and pressure sensor, coolant temperature and pressure sensor, hydrogen concentration sensor, coolant conductivity meter, and insulation tester are all connected to the input end of the controller; The hydrogen concentration sensor includes at least a stack module hydrogen concentration sensor, an air tail exhaust hydrogen concentration sensor, and a hydrogen concentration sensor connected to the main water tank.

4. A marine hydrogen fuel cell power generation system according to claim 1, characterized in that: The system also includes a TBOX unit, which is communicatively connected to the electrical control subsystem and performs wireless communication via a GPRS module to achieve remote communication connection and data storage.

5. A marine hydrogen fuel cell power generation system according to claim 1, characterized in that: The integrated system further comprises a system outer cover, on which an observation window, a maintenance hole group, an exhaust fan and a wall plug-in group are provided.

6. A marine hydrogen fuel cell power generation system according to claim 5, characterized in that: The thermal management subsystem includes a water pump, a thermostat, a PTC heater, a deionizer, a filter, and a main water tank with liquid level detection; The maintenance hole group is arranged on the system outer cover at positions corresponding to the deionizer and the filter.

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