Concentrated pressure supply type hydrogen fuel cell power generation system

Abstract

The utility model provides a concentrated pressure supply type hydrogen fuel cell power generation system. The system comprises a power generation unit, a gas path concentrated pressure supply unit and a water path concentrated pressure supply unit, the power generation unit comprises a plurality of electric pile modules for power generation; the air path centralized pressure supply unit comprises an air compressor arranged on an air supply main pipeline, the air compressor is connected with a plurality of air supply branches through the air supply main pipeline, and an air path switch valve, a humidifier, an air path back pressure valve and an air tail discharge pipe are sequentially arranged on each air supply branch; the waterway centralized pressure supply unit comprises an expansion kettle, a waterway circulating pump and a water collecting tank which are arranged on a water supply main pipeline, the waterway circulating pump is connected with a plurality of water supply branches through the water supply main pipeline, and a waterway switch valve, a three-way valve, a PTC heater and a waterway back pressure valve are sequentially arranged on each water supply branch. Concentrated pressure supply of the air path and the water path in the hydrogen fuel cell power generation system can be achieved, and the equipment cost and the long-term operation cost are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen fuel power generation, and in particular to a centralized pressure-supply hydrogen fuel cell power generation system. Background Art

[0002] In the field of hydrogen fuel power generation technology, for small-power or unit cabinet hydrogen fuel cell power generation systems, air compressors and water circulation pumps are installed in the unit cabinets, which are very flexible to control and have good independence. However, for large-power hydrogen fuel power generation devices with MW-level multi-unit cabinets connected in parallel, separately installing air compressors and water circulation pumps in each unit cabinet will lead to increased equipment costs and power generation costs, and the air compressors and water circulation pumps will also occupy the space of the unit cabinet, increasing the volume of the unit cabinet. Therefore, for MW-level hydrogen fuel power generation devices, the use of centralized air supply and centralized circulating water supply can provide convenient conditions for resource conservation and utilization. The centralized pressure supply system can effectively increase the proportion of high-efficiency operating time of the air compressor or water circulation pump, which is conducive to reducing auxiliary consumption, improving system efficiency, and reducing equipment costs and long-term operating costs. Utility Model Content

[0003] In view of this, the main purpose of this application is to provide a centralized pressure supply type hydrogen fuel cell power generation system, which can realize the centralized pressure supply of the air circuit and water circuit in the hydrogen fuel cell power generation system, and reduce equipment costs and long-term operating costs.

[0004] To achieve the above objectives, the present application provides a centralized pressure supply type hydrogen fuel cell power generation system, comprising a power generation unit, a gas centralized pressure supply unit and a water centralized pressure supply unit;

[0005] The power generation unit includes a plurality of stack modules for generating electricity;

[0006] The centralized air pressure supply unit includes an air compressor arranged on the main air supply pipeline, which is used to control the air intake volume on the main air supply pipeline. The air compressor is connected to a plurality of air supply branches through the main air supply pipeline, and each air supply branch supplies air to a fuel cell module respectively. The air supply branches are sequentially provided with an air circuit switch valve, a humidifier, an air circuit back pressure valve and an air tail exhaust pipe. When the air supply branch is working, the air circuit switch valve is opened to allow the air in the main air supply pipeline to enter the humidifier through the air supply branch for humidification and preheating, and then be transported to the fuel cell module for reaction and power generation. The air output by the fuel cell module enters the humidifier through the air circuit back pressure valve for humidification treatment, and is then discharged through the air tail exhaust pipe. The air circuit back pressure valve is also used to adjust the outlet air pressure of the fuel cell module.

[0007] The water centralized pressure supply unit includes an expansion kettle, a water circulation pump and a water collecting tank arranged on the water supply main pipeline, which is used to centrally supply water to each stack module through the water supply main pipeline. The water circulation pump is connected to several water supply branches through the water supply main pipeline. Each water supply branch supplies water to a stack module respectively. The water supply branch is sequentially provided with a water switch valve, a three-way valve, a PTC heater and a water back pressure valve. When the water supply branch is working, the water switch valve is opened to allow the water in the water supply main pipeline to enter the stack through the water supply branch. module, the water output by the stack module enters the water collecting tank of the water supply main pipeline through the water back pressure valve for circulation; the water back pressure valve is also used to adjust the outlet water pressure of the stack module; the three-way valve is respectively connected to the water supply branch at the water inlet end and the water supply branch at the water outlet end of the stack module, and the water temperature on the water supply branch is controlled by adjusting the switching angle of the three-way valve. The PTC heater is arranged between the three-way valve and the water supply branch at the water inlet end of the stack module, and is used to heat the water on the water supply branch.

[0008] From the above, the present application provides a centralized pressure-supply hydrogen fuel cell power generation system, which performs centralized gas supply through an air compressor and a gas supply main pipeline, and supplies gas to the stack modules through the gas supply branches connected to each stack module respectively. It also performs centralized water supply through an expansion kettle, a water circulation pump and a water supply main pipeline, and supplies water to the stack modules through the water supply branches connected to each stack module respectively, wherein each gas supply branch and water supply branch can be individually controlled by a switch valve to realize the independent operation of each gas supply branch and water supply branch. Through this application, it is possible to realize the centralized pressure supply of the air and water circuits in the hydrogen fuel cell power generation system, reducing equipment costs and long-term operating costs.

[0009] Optionally, the air circuit centralized pressure supply unit further includes an air accumulator arranged on the main air supply pipeline at the air outlet end of the air compressor, for smoothing air pressure fluctuations on the main air supply pipeline.

[0010] As shown above, the air accumulator is connected to the main air supply pipeline at the outlet end of the air compressor, which can smooth out air pressure fluctuations and stabilize the air pressure of the main air supply pipeline.

[0011] Optionally, the air circuit centralized pressure supply unit further includes an air filter arranged at the air inlet end of the air compressor, for filtering the air before entering the air compressor.

[0012] As shown above, the air filter and the air compressor are connected through a large diameter pipe. The air filter can filter out small floating particles or impurities in the air to achieve physical filtration function or chemical filtration function.

[0013] Optionally, the water channel centralized pressure supply unit further includes a water channel accumulator arranged on the water supply main pipeline at the outlet end of the water channel circulation pump, for smoothing water pressure fluctuations on the water supply main pipeline.

[0014] As shown above, the water accumulator is connected to the water supply main pipeline at the outlet end of the water circulation pump, which can smooth out the water pressure fluctuation and stabilize the water pressure of the water supply main pipeline.

[0015] Optionally, the water channel centralized pressure supply unit further includes a water channel radiator connected to the water collecting tank, for dissipating the heat of the water in the water collecting tank when the water temperature in the water collecting tank exceeds a threshold value.

[0016] As shown above, the return water of the battery stack module eventually flows back to the water collecting tank. When the water temperature in the water collecting tank is higher than the threshold, the water radiator can be started to cool the cooling water; when the water temperature in the water collecting tank is lower than the threshold, the operation of the water radiator can be stopped to ensure that the cooling water always has cooling capacity and provide sufficient heat dissipation capacity for the stable operation of each battery stack module.

[0017] Optionally, the air supply branch also includes an air inlet pressure regulating valve and an air inlet pressure sensor arranged at the air inlet end of the fuel cell module. The air inlet pressure regulating valve is used to adjust the inlet air pressure of the fuel cell module, and the air inlet pressure sensor is used to monitor the inlet air pressure of the fuel cell module.

[0018] Optionally, the air supply branch further includes an air inlet temperature sensor and an air outlet temperature sensor provided at both ends of the fuel cell stack module, for monitoring the air inlet temperature and air outlet temperature of the fuel cell stack module.

[0019] As described above, the air pressure and temperature on the air supply branches at both ends of the fuel cell module can be monitored in real time through the real-time pressure sensor and temperature sensor in the gas supply branch. At the same time, the air inlet pressure regulating valve at the air inlet end of the fuel cell module can be used to adjust the inlet pressure of the fuel cell module to ensure that the inlet pressure is within a reasonable range.

[0020] Optionally, the water supply branch further includes an inlet water pressure sensor and an outlet water pressure sensor provided at both ends of the stack module, for monitoring the inlet water pressure and outlet water pressure of the stack module.

[0021] Optionally, the water supply branch further includes an inlet water temperature sensor and an outlet water temperature sensor provided at both ends of the stack module, for monitoring the inlet water temperature and outlet water temperature of the stack module.

[0022] From the above, the water pressure and temperature of the water supply branches at both ends of the stack module can be monitored in real time by using real-time pressure sensors and temperature sensors in the water supply branches.

[0023] Optionally, the water supply branch further includes a deionizer disposed between the water inlet and outlet of the stack module, for deionizing the supply water under the action of the pressure difference between the inlet and outlet water pressures.

[0024] As described above, the deionizer realizes the deionization function under the pressure difference between the inlet and outlet water pressures, ensuring that the conductivity of the circulating water circuit of the hydrogen fuel cell stack meets the requirements.

[0025] These and other aspects of the present application will become more apparent from the following description of the embodiment(s). BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A module diagram of a gas circuit centralized pressure supply unit provided in an embodiment of the present application;

[0027] Figure 2 This is a module diagram of a water channel centralized pressure supply unit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of this application clearer, this application will be further described in detail below with reference to the accompanying drawings.

[0029] The embodiment of the present application provides a centralized pressure supply type hydrogen fuel cell power generation system, which can realize the centralized pressure supply of the air circuit and water circuit in the hydrogen fuel cell power generation system, reducing equipment costs and long-term operating costs. The centralized pressure supply type hydrogen fuel cell power generation system provided by the present application includes a power generation unit, an air circuit centralized pressure supply unit and a water circuit centralized pressure supply unit; the power generation unit includes a plurality of stack modules for power generation; the air circuit centralized pressure supply unit includes an air compressor arranged on the main gas supply pipeline, which is used to control the air intake volume on the main gas supply pipeline, and the air compressor is connected to a plurality of gas supply branches through the main gas supply pipeline, and each gas supply branch supplies gas to a stack module respectively, and gas circuit switching valves are arranged in sequence on the gas supply branches. , humidifier, air circuit back pressure valve and air tail exhaust pipe. When the air supply branch is working, the air circuit switch valve is opened to allow the air in the main air supply pipeline to enter the humidifier through the air supply branch for humidification and preheating, and then be transported to the fuel cell module for reaction and power generation. The air output by the fuel cell module enters the humidifier through the air circuit back pressure valve for humidification and is then discharged through the air tail exhaust pipe. The air circuit back pressure valve is also used to adjust the outlet air pressure of the fuel cell module; the water circuit centralized pressure supply unit includes a unit arranged at The expansion kettle, water circulation pump and water collecting tank on the main water supply pipeline are used to centrally supply water to each stack module through the main water supply pipeline. The water circulation pump is connected to several water supply branches through the main water supply pipeline. Each water supply branch supplies water to a stack module respectively. The water supply branch is sequentially provided with a water switch valve, a three-way valve, a PTC heater and a water back pressure valve. When the water supply branch is working, the water switch valve is opened to allow the water in the main water supply pipeline to enter the stack module through the water supply branch. The water output by the block enters the water collecting tank of the water supply main pipeline through the water back pressure valve for circulation; the water back pressure valve is also used to adjust the water pressure of the stack module; the three-way valve is respectively connected to the water supply branch at the water inlet end and the water supply branch at the water outlet end of the stack module, and the water temperature on the water supply branch is controlled by adjusting the switching angle of the three-way valve. The PTC heater is arranged between the three-way valve and the water supply branch at the water inlet end of the stack module, and is used to heat the water on the water supply branch.

[0030] Refer to the following Figure 1-Figure 2 As shown, the air circuit centralized pressure supply unit and the water circuit centralized pressure supply unit in the embodiment of the present application are described in detail.

[0031] like Figure 1As shown, an air circuit centralized pressure supply unit provided in an embodiment of the present application includes an air filter 1, an air compressor 2 and an air accumulator 3 arranged on a main air supply pipeline. The main air supply pipeline is respectively connected to multiple air supply branches, and each air supply branch is provided with an air circuit switch valve 4, an air tail exhaust pipe 5, a humidifier 6, an air inlet pressure regulating valve 7, an air inlet pressure sensor 8, an air inlet temperature sensor 9, a fuel cell module 10, an air outlet pressure sensor 11, an air outlet temperature sensor 12 and an air circuit back pressure valve 13.

[0032] Among them, the air filter 1 and the air compressor 2 are connected through a large-diameter pipeline. The air filter 1 can filter out fine floating sediments or impurities in the air to achieve physical filtering function or chemical filtering function. The air compressor 2 is driven by an electric motor or a prime mover. The air compressor 2 can control the speed by the speed regulating device to control the air intake volume; the air accumulator 3 is connected to the main air supply pipeline at the outlet end of the air compressor 2. The air accumulator 3 can smooth the air pressure fluctuation and play a role in stabilizing the pressure; the air output by the air machine 2 is smoothly processed by the air accumulator 3 and then enters each air supply branch. When the air supply branch is working, the air supply When the air path switch valve 4 on the branch line is opened, pressurized air can enter the dry side of the humidifier 6. After being humidified by the humidifier 6, the pressurized air flows into the air inlet pressure regulating valve 7. The air inlet pressure regulating valve 7 is connected to the rear end of the air inlet pressure sensor 8. The opening of the air inlet pressure regulating valve 7 can be adjusted according to the value of the air inlet pressure sensor 8 to control the air pressure of the inlet air. After entering the fuel cell stack module 10, the humidified air reacts with the reactants to generate electricity. The reacted air is then connected to the wet side of the humidifier 6 through the air path backpressure valve 13, which uses the air temperature and humidity to humidify and preheat the inlet air. The air outlet backpressure valve 13 can adjust its opening according to the value of the air outlet pressure sensor 11 to control the air outlet backpressure. The air inlet temperature sensor 9 and the air outlet temperature sensor 12 at both ends of the fuel cell stack module 10 monitor the air inlet and outlet temperatures. The humidifier 6 is also connected to the air tail pipe 5 for exhausting exhaust gas.

[0033] In some embodiments, the above-mentioned air compressor can be a large-sized air compressor, which can realize centralized air supply to multiple air supply branches, and the air compressor can be speed-regulated by a frequency conversion control device to avoid working at a high operating point for a long time, and keep the air pressure of the air supply pipeline within a reasonable range, thereby providing stable air for each stack module of the power generation unit.

[0034] like Figure 2As shown, an embodiment of the present application provides a water channel centralized pressure supply unit including an expansion kettle 100, a water channel circulation pump 115, a water channel accumulator 101, a water channel main channel pressure sensor 102, a water collecting tank 113 and a water channel radiator 114 arranged on the water supply main pipeline. The water supply main pipeline is connected to multiple water supply branches respectively, and each water supply branch is provided with a water channel switch valve 103, a water channel back pressure valve 104, a three-way valve 105, a PTC heater 106, a deionizer 107, an inlet water pressure sensor 108, an inlet water temperature sensor 109, an outlet water pressure sensor 110, an outlet water temperature sensor 111, and a fuel cell module 112.

[0035] Among them, the expansion kettle 100 is connected to the water inlet end of the water circulation pump 115 through a hose, which plays a role in replenishing water and preventing the water circulation pump 115 from being sucked empty; the water circulation pump 115 is used to realize water circulation and pressurization under the drive of an electric motor or a prime mover, and the water circulation pump 115 can control the speed increase and decrease through a speed regulating device to control the water intake and water pressure; the water accumulator 101 is connected to the water supply main pipeline at the outlet end of the water circulation pump 115. The water accumulator 101 can smooth the water pressure fluctuations in the water supply main pipeline and play a role in stabilizing the water pressure. A water supply main pipeline pressure sensor 102 is also installed on the water supply main pipeline at the rear end of the water accumulator 101. The control unit can send a control instruction to the speed regulating device according to the value of the water supply main pipeline pressure sensor 102 to adjust the speed of the water circulation pump 115 so that the water supply pressure is stable in a certain range. The water circuit switch valve 103 can open or close the water supply of the water supply branch to the fuel cell module 112, and can also adjust the opening degree to adjust the water pressure entering the stack. When the water supply branch is working, the water circuit switch valve 103 on the water supply branch is opened. At this time, the water supply of the water supply main pipeline enters the fuel cell module 112 through the water supply branch. The water pressure sensor 108 and the water temperature sensor 109 at the front end of the fuel cell module 112 can respectively monitor the water pressure and water temperature of the water supply branch. The water output after cooling the fuel cell module 112 can be transported to the water collecting tank 113 of the water supply main pipeline through the three-way valve 105 and the water circuit back pressure valve 104 through the water supply branch. The water pressure sensor 110 and the water temperature sensor 111 at the rear end of the fuel cell module 112 can respectively monitor the water pressure and water temperature of the water supply branch. The inlet water temperature sensor 109 and the outlet water temperature sensor 111 can also provide calculation data basis for adjusting the opening of the water channel switch valve 103 and the three-way valve 105.

[0036] The two ports of the three-way valve 105 are respectively connected to the water outlet of the fuel cell module 112 and the water back-pressure valve 104, and the third port is connected to the water supply branch of the water inlet of the fuel cell module 112 through the PTC heater 106. The three-way valve 105 can be used to adjust the water temperature entering the fuel cell module 112. At the beginning of startup, the water temperature is low, and the three-way valve 105 is in a small circulation state, which can heat up quickly. At this time, the PTC heater 106 can also be started to accelerate the heating of the coolant; when the temperature rises to the specified value, the three-way valve 105 switches to a large circulation, or adjusts the angle in real time to achieve the purpose of stable control of the water temperature entering the stack.

[0037] In some embodiments, the deionizer 107 is arranged between the water inlet and outlet of the fuel cell module 112, and is used to deionize the water supply under the pressure difference between the inlet and outlet water pressures to ensure that the conductivity of the circulating water circuit of the hydrogen fuel cell stack meets the requirements.

[0038] In some embodiments, the return water from the water outlet of the battery stack module 112 eventually flows back to the water collecting tank 113. When the water temperature in the water collecting tank 113 is higher than the threshold, the water radiator 114 can be started to cool the cooling water; when the water temperature in the water collecting tank 113 is lower than the threshold, the operation of the water radiator 114 can be stopped to ensure that the cooling water always has cooling capacity and provide sufficient heat dissipation capacity for the stable operation of each battery stack module 112.

[0039] In some embodiments, the above-mentioned water circulation pump can be a large-sized water circulation pump, which can realize centralized water supply to multiple water supply branches, and the water circulation pump can be regulated by a frequency conversion control device to avoid working at a high operating point for a long time, and keep the water pressure of the water supply pipeline within a reasonable range, thereby providing stable water supply to each stack module of the power generation unit.

[0040] In summary, the embodiment of the present application provides a centralized pressure-supply hydrogen fuel cell power generation system, which performs centralized gas supply through an air compressor and a gas supply main pipeline, and supplies gas to the stack modules through the gas supply branches connected to each stack module respectively, and also performs centralized water supply through an expansion kettle, a water circulation pump and a water supply main pipeline, and supplies water to the stack modules through the water supply branches connected to each stack module respectively, wherein each gas supply branch and water supply branch can be individually controlled by a switch valve to achieve independent operation of each gas supply branch and water supply branch. Through the embodiment of the present application, there is no need to separately configure an air compressor and a water pump for each power generation unit cabinet, but instead a large-scale air compressor and a water circulation pump are selected to achieve centralized gas supply and centralized water supply for the hydrogen fuel cell power generation system, improve equipment utilization and reduce the operating time of the equipment in the low-efficiency section, thereby reducing the auxiliary consumption of the entire hydrogen fuel cell power generation system, improving overall efficiency, and reducing equipment costs and long-term operating costs.

[0041] It should be noted that the embodiments described in this application are only a part of the embodiments of this application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the above detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the application for protection, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0042] The words "first, second, third" and other similar terms in the specification and claims are only used to distinguish similar objects and do not represent a specific ordering of the objects. It is understandable that the specific order or sequence can be interchanged where permitted so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0043] In the above description, the numbers representing the steps involved do not necessarily mean that the steps must be executed. Intermediate steps may also be included or replaced by other steps. If permitted, the order of the previous and next steps may be interchanged or executed simultaneously.

[0044] The term "comprising" as used in the specification and claims should not be construed as limiting to what is listed thereafter; it does not exclude other elements or steps. Thus, it should be interpreted as specifying the presence of the features, integers, steps, or components mentioned, but not excluding the presence or addition of one or more other features, integers, steps, or components, or groups thereof. Thus, the expression "a device comprising means A and B" should not be limited to a device consisting solely of components A and B.

[0045] The term "one embodiment" or "an embodiment" mentioned in this specification means that the specific features, structures, or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present application. Therefore, the phrases "in one embodiment" or "in an embodiment" appearing in various places in this specification do not necessarily refer to the same embodiment, but may refer to the same embodiment. In addition, in the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other. The technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0046] Note that the above are only preferred embodiments of the present application and the technical principles employed. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the scope of protection of the present application, all of which fall within the scope of protection of the present application.

Claims

1. A centralized pressure supply hydrogen fuel cell power generation system, characterized in that: It includes power generation unit, gas centralized pressure supply unit and water centralized pressure supply unit; The power generation unit includes a plurality of stack modules for generating electricity; The centralized air pressure supply unit includes an air compressor arranged on the main air supply pipeline, which is used to control the air intake volume on the main air supply pipeline. The air compressor is connected to a plurality of air supply branches through the main air supply pipeline, and each air supply branch supplies air to a fuel cell module respectively. The air supply branches are sequentially provided with an air circuit switch valve, a humidifier, an air circuit back pressure valve and an air tail exhaust pipe. When the air supply branch is working, the air circuit switch valve is opened to allow the air in the main air supply pipeline to enter the humidifier through the air supply branch for humidification and preheating, and then be transported to the fuel cell module for reaction and power generation. The air output by the fuel cell module enters the humidifier through the air circuit back pressure valve for humidification treatment, and is then discharged through the air tail exhaust pipe. The air circuit back pressure valve is also used to adjust the outlet air pressure of the fuel cell module. The water centralized pressure supply unit includes an expansion kettle, a water circulation pump and a water collecting tank arranged on the water supply main pipeline, which is used to centrally supply water to each stack module through the water supply main pipeline. The water circulation pump is connected to several water supply branches through the water supply main pipeline. Each water supply branch supplies water to a stack module respectively. The water supply branch is sequentially provided with a water switch valve, a three-way valve, a PTC heater and a water back pressure valve. When the water supply branch is working, the water switch valve is opened to allow the water in the water supply main pipeline to enter the stack through the water supply branch. module, the water output by the stack module enters the water collecting tank of the water supply main pipeline through the water back pressure valve for circulation; the water back pressure valve is also used to adjust the outlet water pressure of the stack module; the three-way valve is respectively connected to the water supply branch at the water inlet end and the water supply branch at the water outlet end of the stack module, and the water temperature on the water supply branch is controlled by adjusting the switching angle of the three-way valve. The PTC heater is arranged between the three-way valve and the water supply branch at the water inlet end of the stack module, and is used to heat the water on the water supply branch.

2. The system according to claim 1, wherein: The air circuit centralized pressure supply unit also includes an air accumulator arranged on the main air supply pipeline at the air outlet end of the air compressor, which is used to smooth the air pressure fluctuations on the main air supply pipeline.

3. The system according to claim 1, wherein: The air circuit centralized pressure supply unit also includes an air filter arranged at the air inlet end of the air compressor, which is used to filter the air before entering the air compressor.

4. The system according to claim 1, wherein: The water channel centralized pressure supply unit further comprises a water channel accumulator arranged on the water supply main pipeline at the outlet end of the water channel circulation pump, for smoothing water pressure fluctuations on the water supply main pipeline.

5. The system according to claim 1, wherein: The water channel centralized pressure supply unit further comprises a water channel radiator connected to the water collecting tank, for dissipating heat from the water in the water collecting tank when the water temperature in the water collecting tank exceeds a threshold value.

6. The system according to claim 1, wherein: The air supply branch also includes an air inlet pressure regulating valve and an air inlet pressure sensor arranged at the air inlet end of the fuel cell module. The air inlet pressure regulating valve is used to adjust the inlet air pressure of the fuel cell module, and the air inlet pressure sensor is used to monitor the inlet air pressure of the fuel cell module.

7. The system according to claim 1, wherein: The air supply branch further includes an air inlet temperature sensor and an air outlet temperature sensor provided at both ends of the fuel cell module, for monitoring the air inlet temperature and air outlet temperature of the fuel cell module.

8. The system according to claim 1, wherein: The water supply branch further includes an inlet water pressure sensor and an outlet water pressure sensor provided at both ends of the stack module, for monitoring the inlet water pressure and outlet water pressure of the stack module.

9. The system according to claim 1, wherein: The water supply branch further includes an inlet water temperature sensor and an outlet water temperature sensor provided at both ends of the stack module, for monitoring the inlet water temperature and the outlet water temperature of the stack module.

10. The system according to claim 1, wherein: The water supply branch also includes a deionizer arranged between the water inlet and outlet of the stack module, which is used to deionize the water supply under the pressure difference between the inlet and outlet water pressures.

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