Multi-stack fixed hydrogen fuel power generation system in test stage

Abstract

The utility model discloses a multi-stack fixed hydrogen fuel power generation system in a test stage. The multi-stack fixed hydrogen fuel power generation system comprises a plurality of unit stacks which are arranged in parallel, the air supply main pipeline is connected with a plurality of air supply branch pipelines, the plurality of air supply branch pipelines are respectively connected to the air inlet ends of the plurality of unit electric piles, the air outlet ends of the plurality of unit electric piles are respectively connected with a plurality of air circulation branch pipelines, and the plurality of air circulation branch pipelines are connected to the air circulation main pipeline; a manifold is arranged on the air supply branch pipeline, and a pressure sensor is mounted on the manifold; the hydrogen supply main pipeline is connected with a plurality of hydrogen supply branch pipelines, the plurality of hydrogen supply branch pipelines are respectively connected to the hydrogen inlet ends of the plurality of unit electric piles, and the hydrogen outlet ends of the plurality of unit electric piles are respectively connected with a plurality of hydrogen circulation branch pipelines; and the controller is electrically connected with the pressure sensor. According to the invention, the pressure of the main pipeline can be regulated and controlled by intuitively observing the air inlet pressure of each unit electric pile, so that the purpose of improving the power generation efficiency is achieved.

Description

Technical Field

[0001] The present application relates to the field of electric power technology, and in particular to a multi-stack fixed hydrogen fuel power generation system in a testing phase. Background Art

[0002] With increasingly stringent controls on carbon emissions and strong support for hydrogen power generation, fixed hydrogen fuel power generation systems are favored by enterprises, universities, science and technology parks, etc. for their high efficiency, environmental friendliness, and renewable energy. Among them, efficiency is the most important concern for customers.

[0003] A hydrogen fuel cell stack generates electricity through a chemical reaction between hydrogen and air in a certain ratio. The pressure and flow of hydrogen and air entering the stack directly affect the system's power generation efficiency. High-power hydrogen fuel cell stacks usually use a multi-stack stacking method, and the hydrogen and air supply method is a total and branch form, that is, hydrogen and air are supplied through their respective main pipes and branch pipes. Currently, the test only refers to the pressure and flow on the main pipe, and then subjectively believes that the pressure and flow of the gas entering each stack are equal. However, in reality, the pressure and flow on each branch pipe are not equal to the pressure and flow on the main pipe, but the tester cannot observe it intuitively, and using the same pressure and flow data for the hydrogen fuel cell stack will lead to the risk of improper use of the stack and low conversion efficiency. Utility Model Content

[0004] In view of this, the main purpose of this application is to provide a multi-stack fixed hydrogen fuel power generation system in the testing phase, so as to achieve the purpose of regulating the pressure of the main pipeline by intuitively observing the intake pressure of each unit stack, thereby improving the power generation efficiency.

[0005] The present application provides a multi-stack fixed hydrogen fuel power generation system in a testing phase, which comprises:

[0006] A hydrogen fuel cell stack comprising a plurality of unit stacks arranged in parallel;

[0007] The main air supply pipeline is connected to a plurality of air supply branch pipelines, which are respectively connected to the air inlet ends of the plurality of unit fuel cell stacks. The air outlet ends of the plurality of unit fuel cell stacks are respectively connected to a plurality of air circulation branch pipelines, which are connected to the main air circulation pipeline. A manifold is provided on the air supply branch pipeline, and a pressure sensor is installed on the manifold. An air compressor and a back pressure valve are provided on the main air supply pipeline.

[0008] The hydrogen supply main pipeline is connected to a plurality of hydrogen supply branch pipelines, which are respectively connected to the hydrogen inlet ends of the plurality of unit fuel cells. The hydrogen outlet ends of the plurality of unit fuel cells are respectively connected to a plurality of hydrogen circulation branch pipelines, which are connected to the hydrogen circulation main pipeline. An ejector valve group is provided on the hydrogen supply main pipeline.

[0009] The coolant supply main pipeline is connected to a plurality of coolant supply branch pipelines, which are respectively connected to the coolant inlet ends of the plurality of unit fuel cell stacks, and the coolant outlet ends of the plurality of unit fuel cell stacks are respectively connected to a plurality of coolant circulation branch pipelines, which are connected to the coolant recovery main pipeline. Temperature sensors and pressure sensors are provided on the air supply main pipeline, the hydrogen supply main pipeline and the coolant supply main pipeline;

[0010] The controller is electrically connected to the pressure sensor, the air compressor, the back pressure valve, the ejector valve group and the temperature sensor respectively.

[0011] As described above, a manifold is set in each branch pipe of the main air supply pipe, and a pressure sensor is installed on the manifold. The controller is electrically connected to each pressure sensor, so that the air pressure entering each unit stack can be visually detected. According to the cross-sectional area of ​​the branch pipe of the main air supply pipe, the controller can calculate the air flow entering each unit stack. This is because when the pipe and medium are fixed, the gas flow changes with the change of gas pressure, so only the pressure needs to be adjusted here. The controller sets the hydrogen path to follow the air path according to the program, and then the controller visually displays the pressure on each branch pipe. The controller controls the air pressure entering each unit stack by adjusting the air compressor and back pressure valve on the main air supply pipe. Through the program setting of the hydrogen path following the air path, by adjusting the ejector valve group, the gas pressure entering each unit stack is finally adjusted, and the gas flow entering each unit stack also changes accordingly.

[0012] Optionally, a plurality of unit battery stacks are vertically arranged in sequence in a box body, and a plurality of partitions are provided in the box body, each partition separating two adjacent unit battery stacks in a vertical direction.

[0013] As shown above, multiple unit battery stacks arranged in parallel can reduce the space occupied; by vertically arranging multiple unit battery stacks in the box, the three-dimensional space is fully utilized, the structure is more compact, maintenance and inspection are convenient, and the space utilization efficiency is improved, which is especially suitable for application scenarios with limited space.

[0014] Optionally, along the flow direction of hydrogen, at a position before the branch pipe of the hydrogen supply main pipeline, a hydrogen filter, a hydrogen heat exchanger, an ejector valve group, a temperature sensor and a pressure sensor are sequentially provided, and the hydrogen circulation main pipeline is connected to the ejector valve group.

[0015] As shown above, the hydrogen filter can keep the hydrogen clean, the hydrogen heat exchanger can adjust the temperature of the hydrogen before it enters the unit stack to ensure that it is in the best working condition; the ejector valve group can adjust the hydrogen supply according to actual needs, and the temperature sensor and pressure sensor detect and feedback the system status, which helps to automatically adjust the ejector valve group; by connecting the hydrogen circulation main pipeline to the ejector valve group, the effective reuse of incompletely reacted hydrogen is promoted and hydrogen loss is reduced.

[0016] Optionally, along the direction of air flow, at a position before the branch pipe of the air supply main pipe, an air filter, a flow meter, an air compressor, an intercooler, a humidifier, a throttle, a back pressure valve, a temperature sensor and a pressure sensor are provided in sequence, and the air circulation main pipe is connected to the air compressor, which is used for energy recovery.

[0017] As shown above, the air filter is located at the air inlet, which can effectively block pollutants such as dust and particulate matter in the air. The air flow on the air supply main pipeline is detected by the flow meter. The air compressor compresses the air to the required pressure, and the intercooler quickly reduces the air temperature after compression to reduce the impact of the heat generated by compression on the system efficiency. The humidifier ensures that the air reaches the ideal humidity level before entering the unit battery stack and optimizes the electrochemical reaction conditions. The throttle adjusts the inlet and outlet airflow of the humidifier to ensure that the humidity of the air is appropriate; the air compressor and back pressure valve can adjust the air pressure in the pipeline. By connecting the air circulation main pipeline to the air compressor, the recovery and recompression of underutilized air are promoted.

[0018] Optionally, a coolant filter, a three-way valve, a water pump, a temperature sensor and a pressure sensor are sequentially provided on the coolant supply main pipeline, and the coolant recovery main pipeline is connected to the three-way valve.

[0019] As shown above, the coolant filter can effectively remove impurities and sediments in the coolant; the three-way valve flexibly adjusts the coolant flow direction and flow rate according to system requirements to maintain efficient heat dissipation; the water pump provides the necessary power support for heat dissipation; the configuration of temperature sensors and pressure sensors enables the system to monitor the temperature and pressure status of the coolant.

[0020] Optionally, lifting rings are provided around the top of the box body for lifting the box body.

[0021] As shown above, the setting of the lifting ring allows the box to be easily lifted by a crane or other lifting equipment. Whether it is initial installation, position adjustment or movement during regular maintenance, it can significantly improve the convenience and safety of operation and reduce manpower requirements.

[0022] Optionally, a refill port is provided on the coolant supply main pipeline, and the position of the refill port is set between the three-way valve and the water pump.

[0023] As described above, the coolant can be quickly replenished through the provided refill port to avoid system overheating due to insufficient coolant, protect the fuel cell stack and other high-temperature components from damage, and ensure the continuous and stable operation of the system.

[0024] Optionally, the pressure sensor is sealed to the manifold by a ferrule.

[0025] As described above, through the elastic deformation of the ferrule, a tight mechanical interlock and seal is formed between the manifold and the pressure sensor, effectively preventing gas leakage and maintaining a good sealing effect even in high pressure or vibration environments.

[0026] Optionally, the branch pipes corresponding to the air supply main pipe, the hydrogen supply main pipe and the coolant supply main pipe are all arranged on one side of the interior of the box.

[0027] From the above, by arranging the various branch pipes in an orderly manner on one side of the box, technicians can quickly locate the area that needs attention without having to search for scattered pipes around the box, which greatly saves maintenance time and improves work efficiency.

[0028] Optionally, the branch pipes corresponding to the air supply main pipe, the hydrogen supply main pipe and the coolant supply main pipe are of the same size.

[0029] From the above, since the sizes of the branch pipes are the same, the controller can calculate the flow rate on each branch pipe based on the air pressure of each branch pipe on the main air supply pipe.

[0030] In summary, the multi-stack fixed hydrogen fuel power generation system in the test phase provided by the present application is a high-power hydrogen fuel cell stack composed of multiple unit stacks arranged in parallel, which reduces the floor space. A manifold is set in each branch pipe of the air supply main pipeline, and a pressure sensor is installed on the manifold. The controller is electrically connected to each pressure sensor, and the air pressure entering each unit stack can be visually detected. According to the cross-sectional area of ​​the branch pipe of the air supply main pipeline, the controller can calculate the air flow entering each unit stack. This is because when the pipeline and the medium are fixed, the gas flow changes with the change of the gas pressure, so only the pressure needs to be adjusted here. The controller sets the hydrogen path to follow the air path according to the program, and then the controller intuitively displays the pressure on each branch pipe, and the controller controls the air pressure entering each unit stack by adjusting the air compressor and back pressure valve on the air supply main pipeline. Through the program setting of the hydrogen path following the air path, by adjusting the ejector valve group, the gas pressure entering each unit stack is finally adjusted, and the gas flow entering each unit stack also changes accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The following further illustrates the various technical features of the present application and the relationships between them with reference to the accompanying drawings. The accompanying drawings are exemplary, and some technical features are not shown in actual proportion. In addition, some drawings may omit technical features that are commonly used in the technical field to which the present application belongs and are not essential for understanding and implementing the present application, or additional technical features that are not essential for understanding and implementing the present application may be shown. In other words, the combination of the various technical features shown in the accompanying drawings is not intended to limit the present application. In addition, throughout the present application, the same figure numbers refer to the same content. The specific description of the drawings is as follows:

[0032] Figure 1 This is a structural diagram of a multi-stack fixed hydrogen fuel power generation system in the testing phase of this application;

[0033] Figure 2 This is a branch pipeline diagram of a multi-stack stationary hydrogen fuel power generation system in the test phase of this application;

[0034] Figure 3 This is a partial three-dimensional structural diagram of a multi-stack fixed hydrogen fuel power generation system in the testing phase of this application.

[0035] Description of Reference Numerals

[0036] 1-unit fuel cell stack, 201-air filter, 202-flow meter, 203-air compressor, 204-intercooler, 205-humidifier, 206-throttle, 207-back pressure valve, 301-hydrogen filter, 302-hydrogen heat exchanger, 303-ejector valve group, 401-coolant filter, 402-three-way valve, 403-water pump, 5-temperature sensor, 6-pressure sensor, 7-manifold, 8-ferrule.

[0037] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present application are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present application can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present application.

[0039] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0040] It should be noted that, in the description herein, the terms "middle", "front", "back", "top", "bottom", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0041] The following describes in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems using specific embodiments. The specific embodiments described below can be combined with each other to form new embodiments. The same or similar ideas or processes described in one embodiment may not be repeated in other embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0042] The present application provides a multi-stack fixed hydrogen fuel power generation system in a testing phase, which comprises:

[0043] A hydrogen fuel cell stack comprising a plurality of unit stacks arranged in parallel;

[0044] The main air supply pipeline is connected to a plurality of air supply branch pipelines, which are respectively connected to the air inlet ends of the plurality of unit fuel cell stacks. The air outlet ends of the plurality of unit fuel cell stacks are respectively connected to a plurality of air circulation branch pipelines, which are connected to the main air circulation pipeline. A manifold is provided on the air supply branch pipeline, and a pressure sensor is installed on the manifold. An air compressor and a back pressure valve are provided on the main air supply pipeline.

[0045] The hydrogen supply main pipeline is connected to a plurality of hydrogen supply branch pipelines, which are respectively connected to the hydrogen inlet ends of the plurality of unit fuel cells. The hydrogen outlet ends of the plurality of unit fuel cells are respectively connected to a plurality of hydrogen circulation branch pipelines, which are connected to the hydrogen circulation main pipeline. An ejector valve group is provided on the hydrogen supply main pipeline.

[0046] The coolant supply main pipeline is connected to a plurality of coolant supply branch pipelines, which are respectively connected to the coolant inlet ends of the plurality of unit fuel cell stacks, and the coolant outlet ends of the plurality of unit fuel cell stacks are respectively connected to a plurality of coolant circulation branch pipelines, which are connected to the coolant recovery main pipeline. Temperature sensors and pressure sensors are provided on the air supply main pipeline, the hydrogen supply main pipeline and the coolant supply main pipeline;

[0047] The controller is electrically connected to the pressure sensor, the air compressor, the back pressure valve, the ejector valve group and the temperature sensor respectively.

[0048] Specifically, a manifold is provided on each branch pipe of the main air supply pipe, and a pressure sensor is installed on the manifold. The controller is electrically connected to each pressure sensor, and the air pressure entering each unit cell stack can be visually detected. Based on the cross-sectional area of ​​the branch pipe of the main air supply pipe, the controller can calculate the air flow rate entering each unit cell stack. This is because when the pipe and the medium are fixed, the gas flow rate changes with the change of the gas pressure, so only the pressure needs to be adjusted here. The controller sets the hydrogen path to follow the air path according to the program, and then the controller visually displays the pressure on each branch pipe. The controller controls the air pressure entering each unit cell stack by adjusting the air compressor and back pressure valve on the main air supply pipe. Through the program setting of the hydrogen path following the air path, by adjusting the ejector valve group, the gas pressure entering each unit cell stack is finally adjusted, and the gas flow rate entering each unit cell stack also changes accordingly.

[0049] In a specific embodiment of the present application, the air supply main pipeline and the hydrogen supply main pipeline have the same size, and the air supply branch pipeline and the hydrogen supply branch pipeline have the same size. Based on the pressure data of the pressure sensor on the consistent air supply branch pipeline and the cross-sectional area of ​​the air supply branch pipeline, under standard conditions, the air flow rate is estimated using the theory of gas dynamics (such as the Bernoulli equation), and the air flow rate on each air supply branch pipeline can be obtained based on the cross-sectional area and air flow rate of the air supply branch pipeline. The controller can obtain the pressure data of the pressure sensor on the air supply main pipeline, the flow data of the flow meter, and the pressure data and flow data of the pressure sensor on each air supply branch pipeline, and determine the ratio of the gas pressure and flow of the hydrogen supply main pipeline and each hydrogen supply branch pipeline by analyzing the ratio between the pressure and flow on the air supply main pipeline and each air supply branch pipeline.

[0050] Optionally, the pressure sensor is sealed to the manifold by a ferrule.

[0051] Specifically, through the elastic deformation of the ferrule, a tight mechanical interlock and seal is formed between the manifold and the pressure sensor, effectively preventing gas leakage and maintaining a good sealing effect even in high pressure or vibration environments.

[0052] Optionally, the branch pipes corresponding to the air supply main pipe, the hydrogen supply main pipe and the coolant supply main pipe are of the same size.

[0053] Specifically, since the sizes of the branch pipes are the same, the controller can calculate the flow rate on each branch pipe according to the air pressure of each branch pipe on the main air supply pipe.

[0054] Optionally, along the flow direction of hydrogen, at a position before the branch pipe of the hydrogen supply main pipeline, a hydrogen filter, a hydrogen heat exchanger, an ejector valve group, a temperature sensor and a pressure sensor are sequentially provided, and the hydrogen circulation main pipeline is connected to the ejector valve group.

[0055] Specifically, the hydrogen filter can keep the hydrogen clean, the hydrogen heat exchanger can adjust the temperature of the hydrogen before it enters the unit fuel cell stack to ensure that it is in the best working condition; the ejector valve group can adjust the hydrogen supply according to actual needs, and the temperature sensor and pressure sensor detect and feedback the system status, which helps to automatically adjust the ejector valve group; by connecting the hydrogen circulation main pipeline to the ejector valve group, the effective reuse of incompletely reacted hydrogen is promoted and hydrogen loss is reduced.

[0056] Optionally, along the direction of air flow, at a position before the branch pipe of the air supply main pipe, an air filter, a flow meter, an air compressor, an intercooler, a humidifier, a throttle, a back pressure valve, a temperature sensor and a pressure sensor are provided in sequence, and the air circulation main pipe is connected to the air compressor, which is used for energy recovery.

[0057] Specifically, the air filter is located at the air inlet and can effectively block pollutants such as dust and particulate matter in the air. The air flow on the air supply main pipeline is detected by a flow meter. The air compressor compresses the air to the required pressure, and the intercooler quickly lowers the air temperature after compression to reduce the impact of the heat generated by compression on the system efficiency. The humidifier ensures that the air reaches the ideal humidity level before entering the unit battery stack and optimizes the electrochemical reaction conditions. The throttle adjusts the inlet and outlet airflow of the humidifier to ensure that the humidity of the air is appropriate; the air compressor and back pressure valve can adjust the air pressure in the pipeline. By connecting the air circulation main pipeline to the air compressor, the recovery and recompression of underutilized air are promoted.

[0058] Optionally, a coolant filter, a three-way valve, a water pump, a temperature sensor and a pressure sensor are sequentially provided on the coolant supply main pipeline, and the coolant recovery main pipeline is connected to the three-way valve.

[0059] Specifically, the coolant filter can effectively remove impurities and sediment in the coolant; the three-way valve flexibly adjusts the coolant flow direction and flow rate according to system requirements, and can maintain efficient heat dissipation; the water pump provides the necessary power support for heat dissipation; the configuration of temperature sensors and pressure sensors enables the system to monitor the temperature and pressure status of the coolant.

[0060] Optionally, a refill port is provided on the coolant supply main pipeline, and the position of the refill port is set between the three-way valve and the water pump.

[0061] Specifically, the coolant can be quickly replenished through the provided refill port to avoid system overheating due to insufficient coolant, protect the fuel cell stack and other high-temperature components from damage, and ensure the continuous and stable operation of the system.

[0062] Figure 1 This is a structural diagram of a specific embodiment of the multi-stack fixed hydrogen fuel power generation system in the test phase of this application. Figure 1As shown, taking the arrangement of three unit fuel cells 1 in parallel as an example, air passes through the air filter 201, flow meter 202, air compressor 203, intercooler 204, humidifier 205, throttle 206, back pressure valve 207, temperature sensor 5 and pressure sensor 6 from the air supply main pipeline in sequence, and enters the three air supply branch pipelines, wherein the three air supply branch pipelines are respectively provided with pressure sensors 6, and enter the three unit fuel cells 1 through the three air supply branch pipelines respectively. The unreacted air passes through the air circulation branch pipeline and the air circulation main pipeline in sequence and enters the air compressor 203, and then is recycled; hydrogen passes through the hydrogen filter 301, hydrogen heat exchanger 302, ejector valve group 303, temperature sensor 5 and pressure sensor 6 from the hydrogen supply main pipeline in sequence. The temperature sensor 5 and the pressure sensor 6 enter the three hydrogen supply branch pipes, and then enter the three unit fuel cells 1 respectively. The unreacted hydrogen passes through the hydrogen circulation branch pipe and the hydrogen circulation main pipe in turn into the ejector valve group 303, and then is recycled; the coolant passes through the filter 401, the three-way valve 402, the water pump 403, the temperature sensor 5 and the pressure sensor 6 from the coolant supply main pipe in turn, enters the three coolant supply branch pipes, and then enters the three unit fuel cells 1 respectively. The coolant after heat exchange flows out through the coolant recovery branch pipe and the coolant recovery main pipe in turn. The coolant recovery main pipe is connected to the three-way valve 402 near the outlet end, which can adjust the temperature of the coolant supplied in the coolant supply main pipe.

[0063] Figure 2 This is a branch pipeline diagram of a multi-stack fixed hydrogen fuel power generation system in the test phase of this application. Figure 2 As shown, air supply branch pipes are provided at preset intervals on the air supply main pipe, and a manifold 7 is provided on each air supply branch pipe near the air supply main pipe. A pressure sensor 6 is installed on the manifold 7 through a ferrule 8, wherein the diameter of the manifold 7 is 10.5 mm, and its diameter can also be changed according to different sensors.

[0064] Optionally, a plurality of unit battery stacks are vertically arranged in sequence in a box body, and a plurality of partitions are provided in the box body, each partition separating two adjacent unit battery stacks in a vertical direction.

[0065] Specifically, multiple unit battery stacks arranged in parallel can reduce the space occupied; by vertically arranging multiple unit battery stacks in the box, the three-dimensional space is fully utilized, the structure is more compact, maintenance and inspection are convenient, and the space utilization efficiency is improved, which is especially suitable for application scenarios with limited space.

[0066] Optionally, lifting rings are provided around the top of the box body for lifting the box body.

[0067] Specifically, the setting of the lifting ring allows the box to be easily lifted by a crane or other lifting equipment. Whether it is initial installation, position adjustment or movement during regular maintenance, it can significantly improve the convenience and safety of operation and reduce manpower requirements.

[0068] Optionally, the branch pipes corresponding to the air supply main pipe, the hydrogen supply main pipe and the coolant supply main pipe are all arranged on one side of the interior of the box.

[0069] Specifically, by arranging the various branch pipes in an orderly manner on one side of the box, technicians can quickly locate the area that needs attention without having to search for scattered pipes around the box, which greatly saves maintenance time and improves work efficiency.

[0070] Figure 3 The three-dimensional installation diagram of the multi-stack fixed hydrogen fuel power generation system in the testing phase is shown. Figure 3 As shown, multiple parallel-arranged unit stacks 1 are assembled on the right side of the box, and multiple main pipelines are vertically distributed on the left side of the box. Each main pipeline is sequentially provided with corresponding horizontal branch pipelines from top to bottom (such as Figure 3 At position B in the figure), they correspond to the inlet and outlet ends of multiple unit fuel cell stacks 1 respectively. A temperature sensor 5 and a pressure sensor 6 are provided on the other side of each main pipeline at position A. Each main pipeline is arranged in parallel front and back on the left side inside the box. In front of the box is the ejector valve group 303 on the hydrogen supply main pipeline. There are threaded holes around the top of the box, on which lifting ears can be installed for easy transportation.

[0071] exist Figure 3 In the embodiment shown, the air supply main pipeline is provided with a plurality of air supply branch pipelines from top to bottom, the air circulation main pipeline is provided with a plurality of air circulation branch pipelines from top to bottom, the hydrogen supply main pipeline is provided with a plurality of hydrogen supply branch pipelines from top to bottom, the hydrogen circulation main pipeline is provided with a plurality of hydrogen circulation branch pipelines from top to bottom, the coolant supply main pipeline is provided with a plurality of coolant supply branch pipelines from top to bottom, and the coolant recovery main pipeline is provided with a plurality of coolant recovery branch pipelines from top to bottom, and the orientation of each branch pipeline is the same and they are all arranged on the same side inside the box.

[0072] In summary, the multi-stack fixed hydrogen fuel power generation system provided by the present application in the test phase, multiple unit stacks arranged in parallel to form a high-power hydrogen fuel cell stack, which reduces the floor space; a manifold is set in each branch pipe of the air supply main pipeline, and a pressure sensor is installed on the manifold. The controller is electrically connected to each pressure sensor, and the air pressure entering each unit stack can be visually detected. According to the cross-sectional area of ​​the branch pipe of the air supply main pipeline, the controller can calculate the air flow entering each unit stack. This is because when the pipeline and the medium are fixed, the gas flow changes with the change of the gas pressure, so only the pressure needs to be adjusted here. The controller sets the hydrogen path to follow the air path according to the program, and then the controller intuitively displays the pressure on each branch pipeline, and the controller controls the air pressure entering each unit stack by adjusting the air compressor and back pressure valve on the air supply main pipeline. Through the program setting of the hydrogen path following the air path, by adjusting the ejector valve group, the gas pressure entering each unit stack is finally adjusted, and the gas flow entering each unit stack also changes accordingly.

[0073] Unless otherwise defined, all technical and scientific terms used in this application are the same as those commonly understood by those skilled in the art to which this application belongs. In the event of any inconsistency, the meaning described in the full text of this application or the meaning derived from the content recorded in the full text of this application shall prevail. In addition, the terms used in this description are only for the purpose of describing the embodiments of the present application and are not intended to limit this application.

[0074] 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 technical concept of the present application, all of which fall within the scope of protection of the present application.

[0075] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structural transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A multi-stack fixed hydrogen fuel power generation system in the testing phase, characterized in that: include: A hydrogen fuel cell stack comprising a plurality of unit stacks arranged in parallel; The main air supply pipeline is connected to a plurality of air supply branch pipelines, and the plurality of air supply branch pipelines are respectively connected to the air inlet ends of the plurality of unit fuel cell stacks, and the air outlet ends of the plurality of unit fuel cell stacks are respectively connected to a plurality of air circulation branch pipelines, and the plurality of air circulation branch pipelines are connected to the main air circulation pipeline, wherein a manifold is provided on the air supply branch pipeline, a pressure sensor is installed on the manifold, and an air compressor and a back pressure valve are provided on the main air supply pipeline; The hydrogen supply main pipeline is connected to a plurality of hydrogen supply branch pipelines, and the plurality of hydrogen supply branch pipelines are respectively connected to the hydrogen inlet ends of the plurality of unit fuel cell stacks. The hydrogen outlet ends of the plurality of unit fuel cell stacks are respectively connected to a plurality of hydrogen circulation branch pipelines, and the plurality of hydrogen circulation branch pipelines are connected to the hydrogen circulation main pipeline. An ejector valve group is provided on the hydrogen supply main pipeline; The coolant supply main pipeline is connected to a plurality of coolant supply branch pipelines, and the plurality of coolant supply branch pipelines are respectively connected to the coolant inlet ends of the plurality of unit fuel cell stacks, and the coolant outlet ends of the plurality of unit fuel cell stacks are respectively connected to a plurality of coolant circulation branch pipelines, and the plurality of coolant circulation branch pipelines are connected to the coolant recovery main pipeline, wherein the air supply main pipeline, the hydrogen supply main pipeline and the coolant supply main pipeline are all provided with temperature sensors and pressure sensors; A controller is electrically connected to the pressure sensor, the air compressor, the back pressure valve, the ejector valve group and the temperature sensor respectively.

2. The multi-stack fixed hydrogen fuel power generation system in the test phase according to claim 1 is characterized in that: The plurality of unit battery stacks are vertically arranged in sequence in a box body, and the box body is provided with a plurality of partitions, each of which separates two adjacent unit battery stacks in a vertical direction.

3. The multi-stack fixed hydrogen fuel power generation system in the test phase according to claim 1 is characterized in that: Along the flow direction of hydrogen, at a position before the branch pipe of the hydrogen supply main pipeline, a hydrogen filter, a hydrogen heat exchanger, the ejector valve group, the temperature sensor and the pressure sensor are sequentially provided, and the hydrogen circulation main pipeline is connected to the ejector valve group.

4. The multi-stack fixed hydrogen fuel power generation system in the test phase according to claim 1 is characterized in that: Along the air flow direction, at a position before the branch pipe of the main air supply pipe, an air filter, a flow meter, the air compressor, an intercooler, a humidifier, a throttle, the back pressure valve, the temperature sensor and the pressure sensor are sequentially provided. The air circulation pipeline is connected to the air compressor, and the air compressor is used for energy recovery.

5. The multi-stack fixed hydrogen fuel power generation system in the test phase according to claim 1 is characterized in that: The coolant supply main pipeline is sequentially provided with a coolant filter, a three-way valve, a water pump, the temperature sensor and the pressure sensor, and the coolant recovery main pipeline is connected to the three-way valve.

6. The multi-stack fixed hydrogen fuel power generation system in the test phase according to claim 2, characterized in that: Lifting rings are provided around the top of the box body for lifting the box body.

7. The multi-stack fixed hydrogen fuel power generation system in the test phase according to claim 5, characterized in that: A refill port is provided on the coolant supply main pipeline, and the position of the refill port is set between the three-way valve and the water pump.

8. The multi-stack fixed hydrogen fuel power generation system in the test phase according to claim 1, characterized in that: The pressure sensor and the manifold are sealed by a ferrule.

9. The multi-stack fixed hydrogen fuel power generation system in the test phase according to claim 2, characterized in that: The branch pipes corresponding to the main air supply pipe, the main hydrogen supply pipe and the main coolant supply pipe are all arranged on one side of the interior of the box.

10. The multi-stack fixed hydrogen fuel power generation system in the test phase according to claim 1, characterized in that: The branch pipes corresponding to the main air supply pipe, the main hydrogen supply pipe, and the main coolant supply pipe are of the same size.

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