Manifold flow equalization method and device for stack type fuel cell

Abstract

The present invention discloses a method and device for equalizing the fluid flow of a manifold of a stack type electric stack, and relates to the technical field of electric stacks. The present invention first opens the first port of the manifold and opens each second port in turn. During the flow of the fluid in the manifold, the fluid flow of the second port in the open state is obtained, and the detection of the fluid flow of the second port is realized; according to the multiple fluid flow rates of the multiple second ports, the flow unevenness of each second port is determined. If at least one flow unevenness is higher than a preset threshold, it means that the fluid flow of the manifold is uneven, and the manifold is optimized until each flow unevenness is lower than the preset threshold. In this way, the manifold can be optimized when the fluid flow of the manifold is uneven, and the fluid flow of the manifold can be made uniform, which is conducive to ensuring that the performance of each single stack is similar.

Description

Technical Field

[0001] The present invention relates to the technical field of battery stacks, and in particular to a method and device for equalizing the flow of manifolds of a stacked battery stack. Background Art

[0002] The development of the battery stack is limited by the area of ​​the bipolar plates and the size of the air, hydrogen, and coolant inlets of the bipolar plates. The power of a single stack of bipolar plates has an upper limit. At present, stacking multiple single stacks to form a whole stack can multiply the power of the battery stack. However, the manifold flow of the stacked battery stack is uneven, which will lead to differences in the performance of each single stack. Summary of the invention

[0003] The present invention solves the technical problem of how to make the manifold flow of a spliced-type fuel cell stack uniform by providing a method and a device for equalizing the manifold flow of a spliced-type fuel cell stack.

[0004] On the one hand, the embodiments of the present invention provide the following technical solutions:

[0005] A method for equalizing fluid flow in a manifold of a stack type fuel cell, wherein the manifold has a first port and a plurality of second ports connected to the first port, and the method comprises:

[0006] Open the first port and open each of the second ports in turn, with only one of the second ports being opened at a time and the other second ports being closed;

[0007] During the process of fluid flowing in the manifold, obtaining the fluid flow rate of the second port in an open state;

[0008] Determining flow non-uniformity of each second port according to a plurality of the fluid flow rates of the plurality of second ports;

[0009] If at least one of the flow non-uniformities is higher than a preset threshold, the manifold is optimized until each of the flow non-uniformities is lower than the preset threshold.

[0010] Preferably, the manifold is any one of an air manifold inlet pipe, an air manifold outlet pipe, a hydrogen manifold inlet pipe, a hydrogen manifold outlet pipe, a coolant manifold inlet pipe and a coolant manifold outlet pipe.

[0011] Preferably, determining the flow non-uniformity of each second port according to the plurality of fluid flow rates of the plurality of second ports comprises:

[0012] Obtaining an average flow rate of a plurality of fluid flows and a flow rate difference between each fluid flow rate and the average flow rate;

[0013] A ratio of the flow difference corresponding to the second port to the average flow is determined as the flow non-uniformity of the second port.

[0014] Preferably, the fluid inlet of each single stack in the assembled fuel cell stack is located at the same position on the single stack, and the fluid outlet is located at the same position on the single stack.

[0015] Preferably, in the process of the fluid flowing in the manifold, obtaining the fluid flow rate of the second port in an open state comprises:

[0016] During the process of the fluid flowing in the manifold, the total pressure drop of the fluid between the first port and the second port in the open state is maintained at a preset pressure drop;

[0017] The fluid flow rate of the second port in an open state is obtained.

[0018] On the other hand, the embodiment of the present invention also provides the following technical solution:

[0019] A manifold fluid flow equalization device for a stack type fuel cell stack, the manifold having a first port and a plurality of second ports connected to the first port, the device comprising:

[0020] a manifold inlet and outlet control module, used to open the first port and open each of the second ports in turn, with only one of the second ports being open at the same time and the other second ports being closed;

[0021] A fluid flow acquisition module, used for acquiring the fluid flow of the second port in an open state during the process of the fluid flowing in the manifold;

[0022] a non-uniformity determination module, configured to determine a flow non-uniformity of each second port according to a plurality of the fluid flow rates of the plurality of second ports;

[0023] A manifold optimization module is used to optimize the manifold if at least one of the flow non-uniformities is higher than a preset threshold, until each of the flow non-uniformities is lower than the preset threshold.

[0024] Preferably, the manifold is any one of an air manifold inlet pipe, an air manifold outlet pipe, a hydrogen manifold inlet pipe, a hydrogen manifold outlet pipe, a coolant manifold inlet pipe and a coolant manifold outlet pipe.

[0025] Preferably, the non-uniformity determination module is further used for:

[0026] Obtaining an average flow rate of a plurality of fluid flows and a flow rate difference between each fluid flow rate and the average flow rate;

[0027] A ratio of the flow difference corresponding to the second port to the average flow is determined as the flow non-uniformity of the second port.

[0028] On the other hand, the embodiment of the present invention also provides the following technical solution:

[0029] An electronic device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a manifold fluid flow equalization method of any of the above-mentioned spliced ​​fuel cell stacks is implemented.

[0030] On the other hand, the embodiment of the present invention also provides the following technical solution:

[0031] A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements any of the above-mentioned manifold fluid flow equalization methods for a spliced ​​fuel cell stack.

[0032] One or more technical solutions provided by the present invention have at least the following technical effects or advantages:

[0033] The present invention first opens the first port of the manifold and opens each second port in turn. During the flow of the fluid in the manifold, the fluid flow of the second port in the open state is obtained, thereby realizing the detection of the fluid flow of the second port; based on the multiple fluid flow rates of the multiple second ports, the flow unevenness of each second port is determined. If at least one flow unevenness is higher than a preset threshold, it means that the fluid flow of the manifold is uneven. Then, the manifold is optimized until each flow unevenness is lower than the preset threshold. In this way, the manifold can be optimized when the fluid flow of the manifold is uneven, so that the fluid flow of the manifold can be made uniform, which is beneficial to ensure that the performance of each single stack is similar. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0035] Figure 1 It is a schematic diagram of the structure of a spliced ​​stack in an embodiment of the present invention;

[0036] Figure 2 Schematic diagram of the structure of the coolant manifold inlet pipe in an embodiment of the present invention;

[0037] Figure 3 Schematic diagram of the structure of the coolant manifold outlet pipe in an embodiment of the present invention;

[0038] Figure 4 It is a flow chart of a method for equalizing the manifold flow of a stack-type fuel cell stack according to an embodiment of the present invention;

[0039] Figure 5 Schematic diagram of the structure of the bipolar plate in an embodiment of the present invention;

[0040] Figure 6 It is a schematic diagram of the structure of the manifold flow equalization device of the spliced ​​fuel cell stack in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The embodiment of the present invention solves the technical problem of how to make the manifold flow of a spliced-type fuel cell stack uniform by providing a method and a device for equalizing the manifold flow of a spliced-type fuel cell stack.

[0042] In order to better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0043] First of all, the term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0044] The manifold of this embodiment has a first port and a plurality of second ports connected to the first port. The manifold of this embodiment can be any one of an air manifold inlet, an air manifold outlet, a hydrogen manifold inlet, a hydrogen manifold outlet, a coolant manifold inlet, and a coolant manifold outlet. When the manifold is an inlet, the first port is a fluid inlet and the second port is a fluid outlet. When the manifold is an outlet, the first port is a fluid outlet and the second port is a fluid outlet. The air manifold inlet and the hydrogen manifold inlet can be connected to Figure 2 The structure is the same as that of the air manifold outlet and the hydrogen manifold outlet. Figure 3 The structure is the same.

[0045] like Figure 4 As shown, the method for equalizing the manifold fluid flow of the stack type fuel cell stack of this embodiment includes:

[0046] Step S1, opening the first port and opening each second port in turn, only one second port is opened at the same time and the other second ports are closed;

[0047] Step S2, during the process of the fluid flowing in the manifold, obtaining the fluid flow rate of the second port in the open state;

[0048] Step S3, determining the flow non-uniformity of each second port according to the multiple fluid flow rates of the multiple second ports;

[0049] Step S4: If at least one flow non-uniformity is higher than a preset threshold, the manifold is optimized until each flow non-uniformity is lower than the preset threshold.

[0050] The method of this embodiment can be implemented on a 3D-modeled patchwork stack model, or on an actual patchwork stack. This embodiment is implemented on a patchwork stack model, and a CFD method can be used.

[0051] for Figure 2 In the coolant manifold inlet shown in step S1, the inlet is opened and outlets 1, 2, and 3 are opened in turn; when outlet 1 is opened, outlets 2 and 3 are closed; when outlet 2 is opened, outlets 1 and 3 are closed; when outlet 3 is opened, outlets 1 and 2 are closed. Figure 3 The coolant manifold outlet pipe shown opens the outlet and opens inlet 1, inlet 2, and inlet 3 in turn; when inlet 1 is opened, inlet 2 and inlet 3 are closed; when inlet 2 is opened, inlet 1 and inlet 3 are closed; when inlet 3 is opened, inlet 1 and inlet 2 are closed.

[0052] In step S2, the fluid flow rate of each second port in the open state can be calculated by an existing CFD method. When the manifold is an air manifold inlet, an air manifold outlet, a hydrogen manifold inlet, a hydrogen manifold outlet, a coolant manifold inlet or a coolant manifold outlet, the corresponding fluids are air, air, hydrogen, hydrogen, coolant, and coolant, respectively.

[0053] In step S3, the flow unevenness of each second port represents the difference between the flow of this second port and the average flow. The larger the difference, the greater the flow unevenness. It can be understood that when the flow unevenness of each second port is very small, the flow of the manifold can be considered to be uniform. Step S3 can first obtain the average flow of multiple fluid flows, and then obtain the difference between the fluid flow of each second port and the average flow. This difference can be directly reflected by the flow difference, or by the ratio of the flow difference to the average flow. This embodiment is preferably reflected by the ratio of the flow difference to the average flow, that is, step S3 includes: obtaining the average flow of multiple fluid flows and the flow difference between each fluid flow and the average flow; determining the ratio of the flow difference corresponding to the second port to the average flow is the flow unevenness of the second port.

[0054] In step S4, the preset threshold value may be 5%, or slightly greater than or less than 5%. If the flow non-uniformity corresponding to at least one second port is higher than the preset threshold value, it indicates that the fluid flow of the manifold is non-uniform, and the manifold needs to be optimized. After optimization, the flow non-uniformity is calculated again through steps S1-S3, and the next cycle is performed. Optimizing the manifold may be changing the structure of the manifold, such as Figure 2and Figure 3 In the embodiment, the pipelines where the multiple second ports are located are arranged in parallel, and the pipeline where the first port is located is a straight pipe and is perpendicular to the pipelines where the multiple second ports are located; for the manifold inlet pipe or the manifold outlet pipe, especially the inlet pipe, if the fluid flow rate of a certain second port is greater than the average flow rate, the connection between the pipeline where the second port is located and the pipeline where the first port is located can be moved in a direction away from the first port, so that the distance between the connection between the pipeline where the second port is located and the pipeline where the first port is located and the first port becomes larger, thereby reducing the fluid flow rate of this second port; if the fluid flow rate of a certain second port is less than the average flow rate, the connection between the pipeline where the second port is located and the pipeline where the first port is located can be moved in a direction close to the first port, so that the distance between the connection between the pipeline where the second port is located and the pipeline where the first port is located and the first port becomes smaller, thereby increasing the fluid flow rate of this second port; in this way, the fluid flow rate of each second port can be close to each other, so as to reduce the flow unevenness corresponding to each second port.

[0055] As can be seen from the above, this embodiment first opens the first port of the manifold and opens each second port in turn. During the flow of the fluid in the manifold, the fluid flow of the second port in the open state is obtained, thereby realizing the detection of the fluid flow of the second port; according to the multiple fluid flow rates of the multiple second ports, the flow unevenness of each second port is determined. If at least one flow unevenness is higher than a preset threshold, it means that the fluid flow of the manifold is uneven. Then, the manifold is optimized until each flow unevenness is lower than the preset threshold. In this way, the manifold can be optimized when the fluid flow of the manifold is uneven, so that the fluid flow of the manifold can be made uniform, which is conducive to ensuring that the performance of each single stack is similar.

[0056] It can be understood that, in this embodiment, the air manifold inlet, air manifold outlet, hydrogen manifold inlet, hydrogen manifold outlet, coolant manifold inlet and coolant manifold outlet can be optimized through steps S1-S4, so that the air flow, hydrogen flow and coolant flow of each single stack are uniform, so that the performance of each single stack is closest.

[0057] The homogenization method mentioned above can make the fluid flow rate of the manifold uniform, but the fluid not only flows in the manifold, but also in the single stack. In order to ensure the uniformity of the fluid flow rate of each single stack, this embodiment preferably has the same position of the fluid inlet and the same position of the fluid outlet on each single stack in the assembled stack. Figure 5As shown, for the coolant, it can flow into the single stack from the left side of the bipolar plate and flow out of the single stack from the right side of the bipolar plate, or it can flow into the single stack from the right side of the bipolar plate and flow out of the single stack from the left side of the bipolar plate, but it is necessary to ensure that the coolant inlet of each single stack is on the left side of the single stack and the coolant outlet is on the right side of the single stack, or the coolant inlet of each single stack is on the right side of the single stack and the coolant outlet is on the left side of the single stack, so that the fluid flow path of each single stack is the same, which can make the fluid flow of each single stack uniform, thereby further making the performance of each single stack close.

[0058] Since this embodiment chooses to optimize the spliced ​​stack model in the simulation, it is necessary to ensure that the simulation conditions are as close to the actual conditions as possible, so that the fluid flow rate detected during the simulation is closer to the actual flow rate, so that the uniformity of the manifold fluid flow rate can be judged more accurately. To this end, the preferred step S2 of this embodiment includes: during the flow of the fluid in the manifold, the total pressure drop of the fluid between the first port and the second port in the open state is maintained at a preset pressure drop; and the fluid flow rate of the second port in the open state is obtained. Among them, the preset pressure drop is the total pressure drop of the fluid between the first port and the second port when the stack is actually working. In this way, the fluid flow rate detected during the simulation can be closer to the actual flow rate, so that the uniformity of the manifold fluid flow rate can be judged more accurately.

[0059] In this embodiment, the cooling liquid manifold inlet pipe and the cooling liquid manifold outlet pipe are used as examples for simulation experiments. The total pressure drop of the fluid between the first port and the second port in the open state is fixed to 50 kPa. The cooling liquid uses incompressible 80°C water. The simulation data obtained are: the cooling liquid flow rates of the three second ports of the cooling liquid manifold inlet pipe are 2.63 kg / s, 2.61 kg / s, and 2.81 kg / s respectively. The average flow rate of the three second ports is (2.63+2.61+2.81) / 3=2.68 kg / s. The flow unevenness of the three second ports is The coolant flow rates of the three second ports of the coolant manifold outlet are 2.4kg / s, 2.46kg / s and 2.61kg / s respectively, and the average flow rate of the three second ports is (2.4+2.46+2.61) / 3=2.49kg / s. The flow unevenness of the three second ports is 3.57%, 1.04% and 4.66% respectively, all lower than 5%, indicating that the coolant flow rate of the coolant manifold outlet is uniform.

[0060] like Figure 6 As shown, this embodiment also provides a manifold fluid flow equalization device for a stack type fuel cell stack, comprising:

[0061] A manifold inlet and outlet control module, used to open the first port and open each second port in turn, with only one second port open at a time and the other second ports closed;

[0062] A fluid flow acquisition module, used for acquiring the fluid flow of the second port in an open state during the flow of the fluid in the manifold;

[0063] a non-uniformity determination module, for determining the flow non-uniformity of each second port according to a plurality of fluid flow rates of the plurality of second ports;

[0064] A manifold optimization module is used to optimize the manifold if at least one flow non-uniformity is higher than a preset threshold until each flow non-uniformity is lower than the preset threshold.

[0065] The manifold is any one of an air manifold inlet pipe, an air manifold outlet pipe, a hydrogen manifold inlet pipe, a hydrogen manifold outlet pipe, a coolant manifold inlet pipe and a coolant manifold outlet pipe.

[0066] Among them, the unevenness determination module is also used to: obtain the average flow of multiple fluid flows and the flow difference between each fluid flow and the average flow; determine the ratio of the flow difference corresponding to the second port to the average flow as the flow unevenness of the second port.

[0067] The manifold fluid flow equalization device of the spliced ​​fuel cell stack of the present embodiment first opens the first port of the manifold and opens each second port in turn. During the flow of the fluid in the manifold, the fluid flow of the second port in the open state is obtained, thereby realizing the detection of the fluid flow of the second port; based on the multiple fluid flow rates of the multiple second ports, the flow unevenness of each second port is determined. If at least one flow unevenness is higher than a preset threshold, indicating that the fluid flow of the manifold is uneven, the manifold is optimized until each flow unevenness is lower than the preset threshold. In this way, the manifold can be optimized when the fluid flow of the manifold is uneven, so that the fluid flow of the manifold can be made uniform, which is conducive to ensuring that the performance of each single stack is similar.

[0068] Furthermore, the fluid inlet of each single stack in the assembled fuel cell stack is at the same position on the single stack, and the fluid outlet is at the same position on the single stack. In this way, the fluid flow path of each single stack is the same, which can make the fluid flow of each single stack uniform, thereby further making the performance of each single stack close.

[0069] Furthermore, the fluid flow acquisition module is also used to: when the fluid flows in the manifold, keep the total pressure drop of the fluid between the first port and the second port in the open state at a preset pressure drop; and acquire the fluid flow of the second port in the open state. In this way, the fluid flow detected during simulation can be closer to the actual flow, so that the uniformity of the manifold fluid flow can be judged more accurately.

[0070] Based on the same inventive concept as the method for equalizing the manifold fluid flow of a spliced ​​fuel cell stack described above, this embodiment also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of any one of the methods for equalizing the manifold fluid flow of a spliced ​​fuel cell stack described above are implemented.

[0071] Among them, the bus architecture (represented by the bus), the bus can include any number of interconnected buses and bridges, and the bus links various circuits including one or more processors represented by the processor and memory represented by the memory. The bus can also link various other circuits such as peripherals, voltage regulators, and power management circuits together, which are all well known in the art and are therefore not further described herein. The bus interface provides an interface between the bus and the receiver and transmitter. The receiver and transmitter can be the same element, namely a transceiver, which provides a unit for communicating with various other devices on a transmission medium. The processor is responsible for managing the bus and general processing, while the memory can be used to store data used by the processor when performing operations.

[0072] Since the electronic device introduced in this embodiment is an electronic device used to implement the manifold fluid flow equalization method of the spliced ​​stack in the embodiment of the present invention, based on the manifold fluid flow equalization method of the spliced ​​stack introduced in the embodiment of the present invention, the technical personnel of this field can understand the specific implementation of the electronic device of this embodiment and its various variations, so how the electronic device implements the method in the embodiment of the present invention will not be described in detail here. As long as the technical personnel of this field implement the electronic device used by the manifold fluid flow equalization method of the spliced ​​stack in the embodiment of the present invention, it belongs to the scope of protection of the present invention.

[0073] Based on the same inventive concept as the above-mentioned manifold fluid flow equalization method for a spliced ​​fuel cell stack, the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements any of the above-mentioned manifold fluid flow equalization methods for a spliced ​​fuel cell stack.

[0074] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0075] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0076] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0077] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0078] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0079] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for equalizing the flow of manifold fluid in a stack type fuel cell, wherein the manifold has a first port and a plurality of second ports connected to the first port, characterized in that: The method comprises: Open the first port and open each of the second ports in turn, with only one of the second ports being opened at a time and the other second ports being closed; During the process of fluid flowing in the manifold, obtaining the fluid flow rate of the second port in an open state; Determining flow non-uniformity of each second port according to a plurality of the fluid flow rates of the plurality of second ports; Determining the flow non-uniformity of each second port according to the multiple fluid flow rates of the multiple second ports includes: obtaining an average flow rate of the multiple fluid flow rates and a flow rate difference between each fluid flow rate and the average flow rate; determining a ratio of the flow rate difference corresponding to the second port to the average flow rate as the flow non-uniformity of the second port; If at least one of the flow non-uniformities is higher than a preset threshold, optimizing the manifold until each of the flow non-uniformities is lower than the preset threshold; The optimization of the manifold includes: if the fluid flow rate of the second port is greater than the average flow rate, moving the connection between the pipeline where the second port is located and the pipeline where the first port is located in a direction away from the first port; if the fluid flow rate of the second port is less than the average flow rate, moving the connection between the pipeline where the second port is located and the pipeline where the first port is located in a direction close to the first port.

2. The method for equalizing the flow rate of manifold fluid in a stack type fuel cell according to claim 1, characterized in that: The manifold is any one of an air manifold inlet pipe, an air manifold outlet pipe, a hydrogen manifold inlet pipe, a hydrogen manifold outlet pipe, a coolant manifold inlet pipe and a coolant manifold outlet pipe.

3. The method for equalizing the flow rate of manifold fluid in a stack type fuel cell according to claim 1, characterized in that: The fluid inlet of each single stack in the assembled fuel cell stack is located at the same position on the single stack, and the fluid outlet is located at the same position on the single stack.

4. The method for equalizing the flow rate of manifold fluid in a stack type fuel cell according to claim 1, characterized in that: During the process of the fluid flowing in the manifold, obtaining the fluid flow rate of the second port in an open state comprises: During the process of the fluid flowing in the manifold, the total pressure drop of the fluid between the first port and the second port in the open state is maintained at a preset pressure drop; The fluid flow rate of the second port in an open state is obtained.

5. A manifold fluid flow equalization device for a stack type fuel cell stack, wherein the manifold has a first port and a plurality of second ports connected to the first port, characterized in that: The device comprises: a manifold inlet and outlet control module, used to open the first port and open each of the second ports in turn, with only one of the second ports being open at the same time and the other second ports being closed; A fluid flow acquisition module, used for acquiring the fluid flow of the second port in an open state during the process of the fluid flowing in the manifold; a non-uniformity determination module, configured to determine a flow non-uniformity of each second port according to a plurality of the fluid flow rates of the plurality of second ports; The unevenness determination module is further used to: obtain an average flow rate of a plurality of fluid flows and a flow rate difference between each fluid flow rate and the average flow rate; determine a ratio of the flow rate difference corresponding to the second port to the average flow rate as the flow unevenness of the second port; a manifold optimization module, configured to optimize the manifold if at least one of the flow non-uniformities is higher than a preset threshold, until each of the flow non-uniformities is lower than the preset threshold; The optimization of the manifold includes: if the fluid flow rate of the second port is greater than the average flow rate, moving the connection between the pipeline where the second port is located and the pipeline where the first port is located in a direction away from the first port; if the fluid flow rate of the second port is less than the average flow rate, moving the connection between the pipeline where the second port is located and the pipeline where the first port is located in a direction close to the first port.

6. The manifold fluid flow equalization device for a stack type fuel cell according to claim 5, characterized in that: The manifold is any one of an air manifold inlet pipe, an air manifold outlet pipe, a hydrogen manifold inlet pipe, a hydrogen manifold outlet pipe, a coolant manifold inlet pipe and a coolant manifold outlet pipe.

7. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method for equalizing the manifold fluid flow of a spliced ​​fuel cell stack as claimed in any one of claims 1 to 4 is implemented.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for equalizing the manifold fluid flow of a spliced ​​fuel cell stack as described in any one of claims 1 to 4 is implemented.

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