Water distribution test method and device for fuel cell and computer equipment

Abstract

The invention discloses a water distribution testing method and device for a fuel cell and computer equipment. The method comprises the steps that a first pressure value, a second pressure value and a third pressure value in a flow channel of the fuel cell at the current moment are obtained, the first pressure value is a pressure value detected at a first preset detection point of the flow channel, the second pressure value is a pressure value detected at a second preset detection point of the flow channel, and the third pressure value is a pressure value detected at a third preset detection point of the flow channel; the third pressure value is a pressure value detected at a third preset detection point of the runner; based on the first pressure value, the second pressure value and the third pressure value, the front-section pressure drop, the rear-section pressure drop and the total pressure drop of the flow channel are determined; based on the front section pressure drop, the rear section pressure drop and the total pressure drop, the water distribution state corresponding to the current moment is determined, and the water distribution state represents whether water flooding occurs in the flow channel or not and the water flooding position. According to the invention, the technical problem that the current water behavior detection method for the fuel cell cannot monitor the water behavior in real time when the reaction occurs is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell testing, and more particularly, to a method, apparatus, and computer device for testing the water distribution in a fuel cell. Background Art

[0002] With the continuous progress of clean energy technologies, fuel cells, especially proton exchange membrane fuel cells (PEMFCs), have become a hot topic in environmental-friendly energy solutions due to their high efficiency and low emissions. The performance and reliability of PEMFCs are significantly affected by the internal water management. Excessive water can lead to flooding in the flow channels and gas diffusion layers (GDLs), hindering gas mass transfer and affecting the thermal management of the battery; insufficient water will reduce the proton conduction ability of the proton exchange membrane and increase the internal resistance of the battery. Therefore, accurately monitoring and controlling the water distribution in PEMFCs is the key to ensuring the efficient and stable operation of the battery.

[0003] Currently, various methods have been developed to monitor the water distribution in fuel cells. For example, a dryer is installed behind the exhaust port, and the water content in the exhaust gas is collected and analyzed to indirectly evaluate the water management status of the battery; neutron imaging technology is used to observe the water distribution in the flow field of PEMFCs in a specific test section, and neutron imaging studies of operating PEMFCs have been carried out under different flow field conditions to reveal the water state inside the battery under cross-flow and serpentine flow fields; a combination of a transparent channel and a real GDL is used to reconstruct the wall surface of the gas flow channel and observe the flow state of liquid water in the flow channel under non-reacting conditions; based on the measurement of the inlet pressure drop, the two-phase flow characteristics in the gas diffusion channels of PEMFCs are studied to formulate effective water management strategies; thermocouple temperature difference measurement technology is used to judge the water content in the flow channel.

[0004] Although the above methods can monitor the water status inside fuel cells to a certain extent, most of the research and patents focus on offline testing or pressure distribution at the overall structure level, lacking real-time online monitoring technology for the in-plane water distribution state during battery operation. In addition, these methods may have limitations in terms of cost, convenience, and efficiency, and are difficult to meet the monitoring requirements in large-scale production and application environments.

[0005] In response to the above problems, no effective solutions have been proposed yet. Summary of the Invention

[0006] Embodiments of the present invention provide a method, apparatus, and computer device for testing the water distribution in a fuel cell to at least solve the technical problem that the current methods for detecting the water behavior in a fuel cell cannot monitor the water behavior during the reaction in real time.

[0007] According to one aspect of an embodiment of the present invention, there is provided a method for testing water distribution in a fuel cell, including: obtaining a first pressure value, a second pressure value, and a third pressure value in a flow channel of the fuel cell at a current moment, where the first pressure value is the pressure value detected at a first preset detection point in the flow channel, the second pressure value is the pressure value detected at a second preset detection point in the flow channel, and the third pressure value is the pressure value detected at a third preset detection point in the flow channel; determining a front-stage pressure drop, a rear-stage pressure drop, and a total pressure drop of the flow channel based on the first pressure value, the second pressure value, and the third pressure value; and determining a water distribution state corresponding to the current moment based on the front-stage pressure drop, the rear-stage pressure drop, and the total pressure drop, where the water distribution state characterizes whether waterlogging occurs in the flow channel and the location of the waterlogging.

[0008] Optionally, the water distribution state includes: a standard state, waterlogging in the front distribution area, waterlogging in the front stage, waterlogging in the rear stage, and waterlogging in the rear distribution area, where the standard state characterizes that there is no waterlogging phenomenon in the flow channel; waterlogging in the front distribution area characterizes that the front distribution area of the flow channel is blocked and there is a waterlogging phenomenon; waterlogging in the front stage characterizes that the middle front part of the flow channel is blocked and there is a waterlogging phenomenon; waterlogging in the rear stage characterizes that the middle rear part of the flow channel is blocked and there is a waterlogging phenomenon; and waterlogging in the rear distribution area characterizes that the rear distribution area of the flow channel is blocked and there is a waterlogging phenomenon.

[0009] Optionally, determining the water distribution state corresponding to the current moment based on the front-stage pressure drop, the rear-stage pressure drop, and the total pressure drop includes: when the front-stage pressure drop and the rear-stage pressure drop are not lower than a first preset threshold and the total pressure drop is lower than the first preset threshold, determining that the water distribution state corresponding to the current moment is waterlogging in the front distribution area or waterlogging in the rear distribution area; and when the first pressure value corresponding to the current moment is less than the first pressure value corresponding to the standard state, determining that the water distribution state corresponding to the current moment is waterlogging in the front distribution area.

[0010] Optionally, when the third pressure value corresponding to the current moment is greater than the third pressure value corresponding to the standard state, determining that the water distribution state corresponding to the current moment is waterlogging in the rear distribution area.

[0011] Optionally, determining the water distribution state corresponding to the current moment based on the front-stage pressure drop, the rear-stage pressure drop, and the total pressure drop includes: when the front-stage pressure drop and the total pressure drop are not lower than a second preset threshold and the rear-stage pressure drop is lower than the second preset threshold, determining that the water distribution state corresponding to the current moment is waterlogging in the front stage.

[0012] Optionally, determining the water distribution state corresponding to the current moment based on the front-stage pressure drop, the rear-stage pressure drop, and the total pressure drop includes: when the rear-stage pressure drop and the total pressure drop are not lower than a third preset threshold and the front-stage pressure drop is not lower than the third preset threshold, determining that the water distribution state corresponding to the current moment is waterlogging in the rear stage.

[0013] Optionally, based on the first pressure value, the second pressure value, and the third pressure value, determine the pressure drop of the front section, the pressure drop of the rear section, and the total pressure drop of the flow channel, including: calculating the difference between the first pressure value and the second pressure value as the pressure drop of the front section; calculating the difference between the second pressure value and the third pressure value as the pressure drop of the rear section; calculating the difference between the first pressure value and the third pressure value as the total pressure drop.

[0014] According to another aspect of the embodiments of the present invention, there is also provided a water distribution testing device for a fuel cell, including: an acquisition module for acquiring the first pressure value, the second pressure value, and the third pressure value in the flow channel of the fuel cell at the current moment, where the first pressure value is the pressure value detected at the first preset detection point of the flow channel, the second pressure value is the pressure value detected at the second preset detection point of the flow channel, and the third pressure value is the pressure value detected at the third preset detection point of the flow channel; a first determination module for determining the pressure drop of the front section, the pressure drop of the rear section, and the total pressure drop of the flow channel based on the first pressure value, the second pressure value, and the third pressure value; a second determination module for determining the water distribution state corresponding to the current moment based on the pressure drop of the front section, the pressure drop of the rear section, and the total pressure drop, where the water distribution state characterizes whether flooding occurs in the flow channel and the location of the flooding.

[0015] According to yet another aspect of the embodiments of the present invention, there is also provided a non - volatile storage medium, the non - volatile storage medium including a stored program, where when the program runs, it controls the device where the non - volatile storage medium is located to execute any one of the above - mentioned water distribution testing methods for a fuel cell.

[0016] According to still another aspect of the embodiments of the present invention, there is also provided a computer device, the computer device including a processor, the processor being used to run a program, where when the program runs, it executes any one of the above - mentioned water distribution testing methods for a fuel cell.

[0017] According to still another aspect of the embodiments of the present invention, there is also provided a computer program product, including a computer program, where when the computer program is executed by a processor, it implements any one of the above - mentioned water distribution testing methods for a fuel cell.

[0018] In an embodiment of the present invention, a water distribution test method for a fuel cell is adopted. By obtaining the first pressure value, the second pressure value, and the third pressure value in the flow channel of the fuel cell at the current moment, where the first pressure value is the pressure value detected at the first preset detection point in the flow channel, the second pressure value is the pressure value detected at the second preset detection point in the flow channel, and the third pressure value is the pressure value detected at the third preset detection point in the flow channel; based on the first pressure value, the second pressure value, and the third pressure value, the pressure drop in the front section, the pressure drop in the rear section, and the total pressure drop of the flow channel are determined; based on the pressure drop in the front section, the pressure drop in the rear section, and the total pressure drop, the water distribution state corresponding to the current moment is determined, where the water distribution state characterizes whether water flooding occurs in the flow channel and the location of the water flooding, achieving the purpose of real-time detecting the water distribution state in the flow channel, thereby realizing the technical effect of improving the real-time performance and accuracy of fuel cell water distribution detection, and further solving the technical problem that the current water behavior detection method for fuel cells cannot monitor the water behavior during the reaction in real time. Description of the Drawings

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0020] Figure 1 The hardware structure block diagram of a computer terminal for implementing a water distribution test method for a fuel cell is shown;

[0021] Figure 2 It is a schematic flowchart of a water distribution test method for a fuel cell provided according to an embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of the position of a detection point provided according to an optional embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of the detection points and the water flooding positions in the flow channel under different conditions provided according to an optional embodiment of the present invention;

[0024] Figure 5 It is a schematic flowchart for judging the water distribution state provided according to an optional embodiment of the present invention;

[0025] Figure 6 It is a schematic diagram of a fuel cell in-plane water content detection system based on the pressure drop method provided according to an optional embodiment of the present invention;

[0026] Figure 7 It is a schematic diagram of punching and hole guiding for a plate provided according to an optional embodiment of the present invention;

[0027] Figure 8It is a structural block diagram of a water distribution test device for a fuel cell according to an embodiment of the present invention. Detailed implementation manners

[0028] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0030] According to an embodiment of the present invention, an embodiment of a water distribution test method for a fuel cell is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that here.

[0031] The method embodiment provided in the first embodiment of the present application can be executed on a mobile terminal, a computer terminal or a similar computing device. Figure 1 A hardware structural block diagram of a computer terminal for implementing a water distribution test method for a fuel cell is shown. As Figure 1 shown, the computer terminal 10 may include one or more (shown as 102a, 102b,..., 102n in the figure) processors (the processor may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA), and a memory 104 for storing data. In addition, it may further include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which can be included as one of the ports of the BUS bus), a network interface, a power supply and / or a camera. Those of ordinary skill in the art can understand, Figure 1The structure shown is only schematic and does not limit the structure of the above-mentioned electronic device. For example, the computer terminal 10 may further include more or fewer components than those shown in Figure 1 or have a different configuration from that shown in Figure 1 .

[0032] It should be noted that the above one or more processors and / or other data processing circuits can generally be referred to as "data processing circuits" herein. The data processing circuit can be embodied in software, hardware, firmware or any combination thereof, in whole or in part. In addition, the data processing circuit can be a single independent processing module, or be incorporated in whole or in part into any one of the other elements in the computer terminal 10. As involved in the embodiments of the present application, the data processing circuit is a kind of processor control (such as the selection of a variable resistance terminal path connected to an interface).

[0033] The memory 104 can be used to store software programs and modules of application software, such as the program instructions / data storage devices corresponding to the water distribution test method for fuel cells in the embodiments of the present invention. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory 104, that is, realizes the water distribution test method for fuel cells of the above application program. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memories. In some instances, the memory 104 may further include a memory remotely provided with respect to the processor, and these remote memories can be connected to the computer terminal 10 through a network. Examples of the above network include but are not limited to the Internet, enterprise intranet, local area network, mobile communication network and their combinations.

[0034] The display can be, for example, a touch-screen liquid crystal display (LCD), which enables the user to interact with the user interface of the computer terminal 10.

[0035] Figure 2 is a schematic flowchart of a method for testing the water distribution of a fuel cell according to an embodiment of the present invention. As shown in Figure 2 , the method includes the following steps:

[0036] Step S201, obtain the first pressure value, the second pressure value and the third pressure value in the flow channel of the fuel cell at the current moment, where the first pressure value is the pressure value detected at the first preset detection point of the flow channel, the second pressure value is the pressure value detected at the second preset detection point of the flow channel, and the third pressure value is the pressure value detected at the third preset detection point of the flow channel.

[0037] In this step, the real-time detection of the water distribution in the internal flow channels of the fuel cell can be achieved by accurately measuring the pressure at specific detection points within the flow channels. Specifically, for each flow channel, three key detection points can be set, respectively labeled as the first, second, and third preset detection points, in order to comprehensively understand the pressure variation within the flow channel and thereby infer the water distribution state. Figure 3 is a schematic diagram of the positions of the detection points provided according to an alternative embodiment of the present invention, as Figure 3 shown. The anode and cathode plates are specially designed to drill holes in the flow channels of the plates for pressure introduction and connect them to an external pressure sensor to detect the pressure data at the detection points within the flow channels.

[0038] The first preset detection point is located near the entrance of the flow channel. The first pressure value at this detection point reflects the pressure level of the gas when it enters the flow channel and can be regarded as an indication of the initial pressure of the flow channel. By monitoring the first pressure value, it is possible to understand whether the gas supply system is operating normally and whether the gas enters the flow channel smoothly. The second preset detection point can be set in the middle part of the flow channel. The second pressure value reflects the pressure state in the middle section of the flow channel and is an important parameter for evaluating the water distribution within the flow channel. When waterlogging occurs inside the flow channel, especially local waterlogging, the change in the second pressure value will be significantly different, which can help locate the specific area of waterlogging. The third preset detection point is located near the exit of the flow channel, which is usually the area where the reaction gas and moisture leave the flow channel. The third pressure value represents the pressure level at the exit of the flow channel and reflects the overall reaction effect and exhaust condition of the flow channel.

[0039] Step S202: Based on the first pressure value, the second pressure value, and the third pressure value, determine the pressure drop in the front section, the pressure drop in the rear section, and the total pressure drop of the flow channel.

[0040] In this step, the pressure drop in the front section refers to the pressure change between the entrance (the first preset detection point) and the middle detection point (the second preset detection point) of the flow channel. The pressure drop in the rear section refers to the pressure change between the middle detection point (the second preset detection point) and the exit (the third preset detection point) of the flow channel. The total pressure drop is the pressure change throughout the entire process from the entrance to the exit of the flow channel, which comprehensively reflects the overall flow characteristics and water distribution state of the flow channel. As an alternative embodiment, Figure 4 is a schematic diagram of the detection points within the flow channel and the positions of waterlogging in different situations provided according to an alternative embodiment of the present invention, as Figure 4As shown, the pressure drop in the front section can be the difference between the first pressure value in the first column and the second pressure value in the second column. The pressure drop in the rear section can be the difference between the second pressure value in the second column and the third pressure value in the third column. The total pressure drop can be the difference between the first pressure value in the first column and the third pressure value in the third column. During the operation of the fuel cell, the pressure data at different positions in the flow channel can be continuously obtained for pressure drop analysis, so as to realize the real-time monitoring of the water distribution state in the flow channel and provide key information for the efficient and stable operation and maintenance of the fuel cell.

[0041] Step S203: Based on the pressure drop in the front section, the pressure drop in the rear section, and the total pressure drop, determine the water distribution state corresponding to the current moment, where the water distribution state characterizes whether there is flooding in the flow channel and the location of the flooding.

[0042] In this step, the pressure drop in the flow channel, including the pressure drop in the front section, the pressure drop in the rear section, and the total pressure drop, is the key index for judging whether there is flooding in the flow channel and the specific location of the flooding. Specifically, the expression of the judgment principle is as follows:

[0043] P in -P out =(P in -P 01 )+(P 01 -P 02 )+(P 02 -P 03 )+(P 03 -P out )

[0044] =(P in -P 11 )+(P 11 -P 12 )↓+(P 12 -P 13 )↓+(P 13 -P out )

[0045] =(P in -P 21 )+(P 21 -P 22 )↑+(P 22 -P 23 )↓+(P 23 -P out )

[0046] =(P in -P 31 )+(P 31 -P 32 )↓+(P 32 -P 33 )↑+(P 33-P out )

[0047] =(P in -P 41 )+(P 41 -P 42 )↓+(P 42 -P 43 )↓+(P 43 -P out )

[0048] wherein, P 01 , P 11 , P 21 , P 31 , and P 41 correspond to the pressures at the inlet measuring points (first preset detection points) of the flow channels in the reaction zones of the standard state, flooding in the front distribution area, flooding in the front section, flooding in the rear section, and flooding in the rear distribution area, respectively; P 02 , P 12 , P 22 , P 32 , and P 42 correspond to the pressures at the middle measuring points (second preset detection points) of the flow channels in the reaction zones of the standard state, flooding in the front distribution area, flooding in the front section, flooding in the rear section, and flooding in the rear distribution area, respectively; P 03 , P 13 , P 23 , P 33 , and P 43 correspond to the pressures at the outlet measuring points (third preset detection points) of the flow channels in the reaction zones of the standard state, flooding in the front distribution area, flooding in the front section, flooding in the rear section, and flooding in the rear distribution area, respectively; P in is the inlet pressure of the bipolar plate, and P out is the outlet pressure of the bipolar plate.

[0049] During the operation of the fuel cell, the one-to-one correspondence between the gas flow rate and the gas pressure drop in a section of the flow channel can be monitored at a certain temperature and pressure. By monitoring the pressure drop after a certain amount of gas passes through the flow channel, the actual gas flow rate value of each flow channel can be deduced, and the gas flow rate distribution consistency between the flow channels on the bipolar plate can be evaluated when the reaction occurs. At the same time, the pressure drop of each flow channel can also reflect the water distribution state of the flow channel. When a certain flow channel is blocked by water, due to the decrease in the flow rate, the pressure drop will decrease sharply.

[0050] The pressure drop in the front section refers to the pressure drop from the first preset detection point to the second preset detection point, which reflects the pressure loss caused by friction, reaction, and water management mechanisms when the gas flows in the front part of the flow channel. If waterlogging occurs in the front section of the flow channel, that is, the area near the inlet of the flow channel is blocked by liquid water, this will cause the gas flow to be blocked, and the pressure drop in the front section will increase abnormally. The pressure drop in the rear section refers to the pressure drop from the second preset detection point to the third preset detection point, which reflects the pressure loss when the gas flows in the rear part of the flow channel. If waterlogging occurs in the rear section of the flow channel (the area near the outlet of the flow channel), the gas flow in the rear section will be greatly hindered, resulting in an increase in the pressure drop in the rear section. The total pressure drop is the pressure drop along the entire length of the flow channel from the inlet to the outlet, which reflects the comprehensive flow resistance and reaction efficiency in the flow channel. If waterlogging occurs in the front flow distribution area or the rear flow distribution area of the flow channel, that is, the area near the inlet or outlet of the flow channel is blocked by liquid water, the total pressure drop will be close to 0.

[0051] Through the above steps, the purpose of real-time detecting the water distribution state in the flow channel is achieved, thus realizing the technical effect of improving the real-time performance and accuracy of fuel cell water distribution detection, and further solving the technical problem that the current water behavior detection method for fuel cells cannot monitor the water behavior during the reaction in real time.

[0052] As an optional embodiment, the water distribution state includes: standard state, waterlogging in the front flow distribution area, waterlogging in the front section, waterlogging in the rear section, and waterlogging in the rear flow distribution area. Among them, the standard state indicates that there is no waterlogging in the flow channel; waterlogging in the front flow distribution area indicates that the front flow distribution area of the flow channel is blocked and there is waterlogging; waterlogging in the front section indicates that the middle and front parts of the flow channel are blocked and there is waterlogging; waterlogging in the rear section indicates that the middle and rear parts of the flow channel are blocked and there is waterlogging; waterlogging in the rear flow distribution area indicates that the rear flow distribution area of the flow channel is blocked and there is waterlogging.

[0053] Optionally, by monitoring and analyzing the pressure distribution in the internal flow channel of the fuel cell, five different water distribution states can be defined, and these five states respectively correspond to the normal and abnormal conditions of water distribution in different areas during the operation of the fuel cell.

[0054] Specifically, in the standard state, liquid water in the flow channel is generated and excluded, and the pressure drops in the front section and rear section of the reaction area show a slightly fluctuating state. In addition, after the fuel cell starts to operate, due to the generation of liquid water in the system, the overall resistance increases, and the pressure drop in the standard state is higher than that before operation. At the same time, it also means that the phenomenon of only an increase in pressure drop is not sufficient to judge whether waterlogging has occurred in the flow channel.

[0055] When waterlogging occurs in the front flow distribution area, liquid water accumulates in the area near the inlet of the flow channel. When a liquid column forms and blocks the flow channel, the gas flow rate will decrease significantly, resulting in the total pressure drop in the reaction area of the flow channel being almost zero. The gas cannot enter the flow channel smoothly at the inlet, and subsequent reactions and flows cannot proceed naturally, so the total pressure drop is absent in the pressure distribution.

[0056] Front - end waterlogging means that liquid water accumulates and blocks in the middle - front part of the flow channel, affecting the normal flow of gas. In this state, the pressure drop in the front part of the flow channel will increase abnormally because the gas encounters water blockage and needs to overcome additional resistance to pass through. At the same time, the pressure drop in the rear part will drop to zero or close to zero because the gas has been severely blocked in the waterlogged front part and it is difficult to continue flowing forward.

[0057] Rear - end waterlogging refers to the accumulation and formation of blockage of liquid water in the middle - rear part of the flow channel, affecting the gas flow and the normal operation of the battery. In this state, the pressure drop in the front part of the flow channel will suddenly drop to zero or close to zero, indicating that the gas has encountered an obstacle in the waterlogged front part and cannot pass through to the rear part normally. However, the pressure drop in the rear part will increase significantly because the water accumulated in the rear part forms a closed space, blocking the gas discharge and resulting in pressure accumulation in the rear part.

[0058] Waterlogging in the rear distribution area means that waterlogging occurs in the area near the outlet of the flow channel, resulting in restricted gas discharge at the end of the flow channel. When this state occurs, the total pressure drop in the reaction area of the flow channel will disappear or be close to zero because the gas cannot be discharged smoothly at the outlet, forming a closed high - pressure environment.

[0059] As an optional embodiment, based on the front - end pressure drop, rear - end pressure drop, and total pressure drop, determine the water distribution state corresponding to the current moment, including: when the front - end pressure drop and rear - end pressure drop are not lower than the first preset threshold and the total pressure drop is lower than the first preset threshold, determine that the water distribution state corresponding to the current moment is front - end waterlogging in the distribution area or waterlogging in the rear distribution area; when the first pressure value corresponding to the current moment is less than the first pressure value corresponding to the standard state, determine that the water distribution state corresponding to the current moment is front - end waterlogging in the distribution area.

[0060] Optionally, Figure 5 is a flowchart for judging the water distribution state provided according to an optional embodiment of the present invention. As Figure 5 shown, first, judge whether there is a pressure drop lower than the first preset threshold. The first preset threshold can be 0 or a pressure value close to 0. When liquid water forms a liquid column in the front distribution area of the flow channel and blocks the flow channel, the flow rate decreases, the total pressure drop in the reaction area of the flow channel is 0, and the first pressure value is less than the first pressure value corresponding to the standard state. The specific judgment basis is as follows:

[0061] P in >P 11 =P 12 =P 13 =P out

[0062] (P 11 -P 13 )=0

[0063] P 11 <P 01

[0064] As an alternative embodiment, when the third pressure value corresponding to the current moment is greater than the third pressure value corresponding to the standard state, determine that the water distribution state corresponding to the current moment is flooding in the post-distribution area.

[0065] Optionally, as Figure 5 shown, when liquid water forms a liquid column in the post-distribution area of the flow channel to block the flow channel, the flow rate decreases, the total pressure drop in the reaction area is 0, and the third pressure value is greater than the third pressure value corresponding to the standard state. The specific judgment basis is as follows:

[0066] P in =P 41 =P 42 =P 43 >P out

[0067] (P 41 -P 43 )=0

[0068] P 43 >P 03

[0069] As an alternative embodiment, based on the pressure drop in the front section, the pressure drop in the rear section, and the total pressure drop, determine the water distribution state corresponding to the current moment, including: when the pressure drop in the front section and the total pressure drop are not lower than the second preset threshold, and the pressure drop in the rear section is lower than the second preset threshold, determine that the water distribution state corresponding to the current moment is flooding in the front section.

[0070] Optionally, as Figure 5 shown, the second preset threshold can also be 0 or a pressure value close to 0. In the state of flooding in the front section, liquid water blocks the front part of the flow channel, the pressure drop in the front section increases, and the pressure drop in the rear section drops to 0. The specific judgment basis is as follows:

[0071] P in =P 21 >P 22 =P 23 =P out

[0072] (P 21 -P 22 )>(P 01 -P 02 )

[0073] (P 22 -P 23 )=0

[0074] As an alternative embodiment, based on the pressure drop in the front section, the pressure drop in the rear section, and the total pressure drop, determine the water distribution state corresponding to the current moment, including: when the pressure drop in the rear section and the total pressure drop are not lower than the third preset threshold, and the pressure drop in the front section is not lower than the third preset threshold, determine that the water distribution state corresponding to the current moment is flooding in the rear section.

[0075] Optionally, as Figure 5 shown, the third preset threshold can also be 0 or a pressure value close to 0. In the case of flooding in the rear section, the liquid water blocks the middle and rear parts of the flow channel, the pressure drop in the front section drops to 0, and the pressure drop in the rear section increases. The specific judgment basis is as follows:

[0076] P in = P 31 = P 32 > P 33 = P out

[0077] (P 31 - P 32 ) = 0

[0078] (P 32 - P 33 ) > (P 02 - P 03 )

[0079] As an alternative embodiment, based on the first pressure value, the second pressure value, and the third pressure value, determine the pressure drop in the front section, the pressure drop in the rear section, and the total pressure drop of the flow channel, including: calculate the difference between the first pressure value and the second pressure value as the pressure drop in the front section; calculate the difference between the second pressure value and the third pressure value as the pressure drop in the rear section; calculate the difference between the first pressure value and the third pressure value as the total pressure drop.

[0080] Optionally, the pressure drop in the front section refers to the pressure drop between the inlet of the flow channel and the middle measurement point, which quantifies the resistance encountered by the gas when flowing in the front section of the flow channel. This pressure drop can be obtained by calculating the difference between the first pressure value (inlet pressure) and the second pressure value (pressure inside the flow channel at the middle measurement point). The pressure drop in the rear section measures the pressure drop from the middle measurement point of the flow channel to the outlet, which reveals the flow condition in the rear section of the flow channel. Calculating the pressure drop in the rear section requires the difference between the second pressure value (pressure inside the flow channel at the middle measurement point) and the third pressure value (outlet pressure). The total pressure drop is the pressure drop along the entire length of the flow channel from the inlet to the outlet, which comprehensively reflects the total resistance of the gas flow in the flow channel. The total pressure drop is obtained by calculating the difference between the first pressure value (inlet pressure) and the third pressure value (outlet pressure).

[0081] As an alternative embodiment, a water content detection system for implementing the above method is also provided.

[0082] Figure 6It is a schematic diagram of a system for detecting in-plane water content of a fuel cell based on the pressure drop method according to an alternative embodiment of the present invention. As Figure 6 shown, the first part of the system is used to supply hydrogen, air, and cooling water to the fuel cell, including key modules such as an electronic load system, a stack temperature control system, a gas supply system, and a data acquisition system. Specifically, the electronic load system is used to regulate the battery output to simulate the power demand in actual applications and evaluate the performance of the fuel cell under different loads. The stack temperature control system is used to control the fuel cell stack temperature by controlling the temperature and flow rate of the circulating water, and is composed of components such as a heat exchanger, a cooling system, a heating tank, and temperature, pressure, and flow sensors. The gas supply system is used to provide hydrogen and oxygen required for the fuel cell reaction, and includes components such as a humidification tank, a pressure control valve, a heater, and temperature, pressure, and flow sensors. The data acquisition system is used to record key data such as voltage, current, humidity, flow rate, pressure, and temperature.

[0083] The second part is a pressure test system for the fuel cell plate flow channels. This system is used to detect the pressure and pressure difference in the plate flow channels. Specifically, 12 pressure sensors are used to monitor the pressure at 12 measurement points at the inlets of 4 flow channels in the anode plane. The flow channels can be the 1st / 20th / 40th / 60th flow channels, and the user can modify the dimensions according to the flow channels to be measured and the fuel cell stack by themselves; the data acquisition system is used to collect the flow channel pressure data; the fuel cell is composed of an end plate, an insulating plate, a current collector plate, a cathode and anode plate, and a membrane electrode. Among them, the cathode and anode plates are specially designed. Figure 7 It is a schematic diagram of punching and guiding holes in a plate according to an alternative embodiment of the present invention. As Figure 7 shown, punch and guide the pressure in the plate flow channels and connect them to an external pressure sensor to detect the pressure data at the inlet and outlet of the flow channels.

[0084] In addition, for testing the pressure drop and ensuring airtightness, it is necessary to ensure that all pipelines have good airtightness when testing the pressure drop. When introducing gas, the gas is introduced into the plate from the side and sealed with a threaded joint. The sealing of the pressure guiding hole is mainly through an O-ring, and the end plate is connected to the pressure guiding pipe through a joint, and then the pressure guiding pipe is connected to the pressure sensor. A single-cell fixture is used to introduce a certain flow rate of gas, and the flow rate is adjusted by the gas flow controller at the front end, while the pressure is controlled by the back pressure valve at the back end of the battery.

[0085] As an alternative embodiment, a method for detecting the consistency of fuel cell flow distribution is also provided, which specifically may include the following steps:

[0086] S1: First, assemble a single-section graphite fixture, including an end plate assembly, an O-ring seal, a membrane electrode assembly, and anode and cathode graphite plates. The thickness of the graphite plate in this embodiment is 20 mm. A total of 12 pressure tapping holes are provided in the middle and tail of the flow channel head, and the diameter of the pressure tapping holes is 1 mm. To ensure good airtightness between the pressure tapping holes and the battery without external leakage, an O-ring seal groove is opened between the graphite plate and the end plate, and an O-ring is placed. The graphite plate, the membrane electrode assembly, and the end plate are assembled with bolts.

[0087] S2: In this embodiment, pressure is tapped through a 3-mm pressure tapping tube. There is no specific requirement for the tube diameter, but a thinner pressure tapping tube can improve the response speed and sensitivity of the pressure, improve the experimental accuracy, and the pressure tapping tubes are separately connected to a differential pressure gauge.

[0088] S3: Before introducing gas into the online single cell, first calibrate the sensor, and then start the online test of gas introduction into the single cell.

[0089] S4: Judge the in-plane water distribution state by measuring the change in pressure drop at the measuring points.

[0090] The above steps provide a method for observing the in-plane water distribution during the operation of a fuel cell, which is mainly used to evaluate the consistency of the flow rate distribution and the water distribution state between the flow channels of the bipolar plates, and is used for formulating the water management strategy of the stack and optimizing the bipolar plate design. This method has significant advantages such as non-invasiveness, convenience, accuracy, real-time monitoring, and low cost, and is of great significance for improving the performance and durability of the fuel cell stack and for the water and heat management of the fuel cell.

[0091] It should be noted that for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0092] Through the description of the above embodiments, those skilled in the art can clearly understand that the method for testing the water distribution for a fuel cell according to the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc), and includes several instructions for causing a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0093] According to an embodiment of the present invention, there is also provided an apparatus for implementing the above method. Figure 8 FIG. Figure 8 is a structural block diagram of a water distribution test apparatus for a fuel cell according to an embodiment of the present invention. As Figure 8 shown, the apparatus includes: an acquisition module 81, a first determination module 82, and a second determination module 83. The apparatus will be described below.

[0094] The acquisition module 81 is configured to acquire a first pressure value, a second pressure value, and a third pressure value in a flow channel of a fuel cell at a current moment, where the first pressure value is a pressure value detected at a first preset detection point in the flow channel, the second pressure value is a pressure value detected at a second preset detection point in the flow channel, and the third pressure value is a pressure value detected at a third preset detection point in the flow channel.

[0095] The first determination module 82, connected to the acquisition module 81, is configured to determine a front-stage pressure drop, a rear-stage pressure drop, and a total pressure drop of the flow channel based on the first pressure value, the second pressure value, and the third pressure value.

[0096] The second determination module 83, connected to the first determination module 82, is configured to determine a water distribution state corresponding to the current moment based on the front-stage pressure drop, the rear-stage pressure drop, and the total pressure drop, where the water distribution state characterizes whether waterlogging occurs in the flow channel and the location of the waterlogging.

[0097] It should be noted here that the above acquisition module 81, first determination module 82, and second determination module 83 correspond to steps S201 to S203 in the embodiment. The instances and application scenarios implemented by the multiple modules and the corresponding steps are the same, but are not limited to the content disclosed in the above embodiment. It should be noted that the above modules, as part of the apparatus, can run in the computer terminal 10 provided in the embodiment.

[0098] An embodiment of the present invention can provide a computer device. Optionally, in this embodiment, the above computer device can be located in at least one network device among multiple network devices of a computer network. The computer device includes a memory and a processor.

[0099] Among them, the memory can be used to store software programs and modules, such as the program instructions / modules corresponding to the water distribution test method and device for fuel cells in the embodiments of the present invention. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory, that is, to implement the above-mentioned water distribution test method for fuel cells. The memory may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memories. In some instances, the memory may further include a memory remotely disposed relative to the processor, and these remote memories can be connected to the computer terminal through a network. Examples of the above network include but are not limited to the Internet, enterprise intranet, local area network, mobile communication network, and their combinations.

[0100] The processor can call the information and application programs stored in the memory through the transmission device to execute the following steps: obtain the first pressure value, the second pressure value, and the third pressure value in the flow channel of the fuel cell at the current moment, where the first pressure value is the pressure value detected at the first preset detection point in the flow channel, the second pressure value is the pressure value detected at the second preset detection point in the flow channel, and the third pressure value is the pressure value detected at the third preset detection point in the flow channel; determine the front-section pressure drop, the rear-section pressure drop, and the total pressure drop of the flow channel based on the first pressure value, the second pressure value, and the third pressure value; determine the water distribution state corresponding to the current moment based on the front-section pressure drop, the rear-section pressure drop, and the total pressure drop, where the water distribution state characterizes whether waterlogging occurs in the flow channel and the location of the waterlogging.

[0101] Optionally, the above processor can also execute the program code of the following steps: The water distribution state includes: standard state, waterlogging in the front distribution area, waterlogging in the front section, waterlogging in the rear section, and waterlogging in the rear distribution area, where the standard state characterizes that there is no waterlogging phenomenon in the flow channel; waterlogging in the front distribution area characterizes that the front distribution area of the flow channel is blocked and there is a waterlogging phenomenon; waterlogging in the front section characterizes that the middle front part of the flow channel is blocked and there is a waterlogging phenomenon; waterlogging in the rear section characterizes that the middle rear part of the flow channel is blocked and there is a waterlogging phenomenon; waterlogging in the rear distribution area characterizes that the rear distribution area of the flow channel is blocked and there is a waterlogging phenomenon.

[0102] Optionally, the above processor can also execute the program code of the following steps: Determine the water distribution state corresponding to the current moment based on the front-section pressure drop, the rear-section pressure drop, and the total pressure drop, including: when the front-section pressure drop and the rear-section pressure drop are not lower than the first preset threshold and the total pressure drop is lower than the first preset threshold, determine that the water distribution state corresponding to the current moment is waterlogging in the front distribution area or waterlogging in the rear distribution area; when the first pressure value corresponding to the current moment is less than the first pressure value corresponding to the standard state, determine that the water distribution state corresponding to the current moment is waterlogging in the front distribution area.

[0103] Optionally, the above-mentioned processor may further execute the program code of the following steps: when the third pressure value corresponding to the current moment is greater than the third pressure value corresponding to the standard state, determine that the water distribution state corresponding to the current moment is flooding in the post-allocation area.

[0104] Optionally, the above-mentioned processor may further execute the program code of the following steps: based on the front-section pressure drop, the rear-section pressure drop, and the total pressure drop, determine the water distribution state corresponding to the current moment, including: when the front-section pressure drop and the total pressure drop are not lower than the second preset threshold and the rear-section pressure drop is lower than the second preset threshold, determine that the water distribution state corresponding to the current moment is flooding in the front section.

[0105] Optionally, the above-mentioned processor may further execute the program code of the following steps: based on the front-section pressure drop, the rear-section pressure drop, and the total pressure drop, determine the water distribution state corresponding to the current moment, including: when the rear-section pressure drop and the total pressure drop are not lower than the third preset threshold and the front-section pressure drop is not lower than the third preset threshold, determine that the water distribution state corresponding to the current moment is flooding in the rear section.

[0106] Optionally, the above-mentioned processor may further execute the program code of the following steps: based on the first pressure value, the second pressure value, and the third pressure value, determine the front-section pressure drop, the rear-section pressure drop, and the total pressure drop of the flow channel, including: calculate the difference between the first pressure value and the second pressure value as the front-section pressure drop; calculate the difference between the second pressure value and the third pressure value as the rear-section pressure drop; calculate the difference between the first pressure value and the third pressure value as the total pressure drop.

[0107] By adopting the embodiment of the present invention, a water distribution test method for a fuel cell is provided. By obtaining the first pressure value, the second pressure value, and the third pressure value in the flow channel of the fuel cell at the current moment, where the first pressure value is the pressure value detected at the first preset detection point of the flow channel, the second pressure value is the pressure value detected at the second preset detection point of the flow channel, and the third pressure value is the pressure value detected at the third preset detection point of the flow channel; based on the first pressure value, the second pressure value, and the third pressure value, determine the front-section pressure drop, the rear-section pressure drop, and the total pressure drop of the flow channel; based on the front-section pressure drop, the rear-section pressure drop, and the total pressure drop, determine the water distribution state corresponding to the current moment, where the water distribution state characterizes whether flooding occurs in the flow channel and the location of the flooding, achieving the purpose of real-time detecting the water distribution state in the flow channel, thereby realizing the technical effect of improving the real-time performance and accuracy of fuel cell water distribution detection, and further solving the technical problem that the current water behavior detection method for fuel cells cannot monitor the water behavior during the reaction in real time.

[0108] Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by a program instructing the relevant hardware of the terminal device, and the program can be stored in a non-volatile storage medium, which can include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, an optical disk, etc.

[0109] An embodiment of the present invention also provides a non-volatile storage medium. Optionally, in this embodiment, the above non-volatile storage medium can be used to store the program code executed by the water distribution test method for fuel cells provided in the above embodiments.

[0110] Optionally, in this embodiment, the above non-volatile storage medium can be located in any one of the computer terminals in the computer terminal group in the computer network, or in any one of the mobile terminals in the mobile terminal group.

[0111] Optionally, in this embodiment, the non-volatile storage medium is set to store the program code for performing the following steps: obtaining the first pressure value, the second pressure value, and the third pressure value in the flow channel of the fuel cell at the current moment, where the first pressure value is the pressure value detected at the first preset detection point in the flow channel, the second pressure value is the pressure value detected at the second preset detection point in the flow channel, and the third pressure value is the pressure value detected at the third preset detection point in the flow channel; determining the front-section pressure drop, the rear-section pressure drop, and the total pressure drop of the flow channel based on the first pressure value, the second pressure value, and the third pressure value; determining the water distribution state corresponding to the current moment based on the front-section pressure drop, the rear-section pressure drop, and the total pressure drop, where the water distribution state characterizes whether waterlogging occurs in the flow channel and the location of the waterlogging.

[0112] Optionally, in this embodiment, the non-volatile storage medium is set to store the program code for performing the following steps: the water distribution state includes: the standard state, waterlogging in the front distribution area, waterlogging in the front section, waterlogging in the rear section, and waterlogging in the rear distribution area, where the standard state characterizes that there is no waterlogging phenomenon in the flow channel; waterlogging in the front distribution area characterizes that the front distribution area of the flow channel is blocked and there is a waterlogging phenomenon; waterlogging in the front section characterizes that the middle front part of the flow channel is blocked and there is a waterlogging phenomenon; waterlogging in the rear section characterizes that the middle rear part of the flow channel is blocked and there is a waterlogging phenomenon; waterlogging in the rear distribution area characterizes that the rear distribution area of the flow channel is blocked and there is a waterlogging phenomenon.

[0113] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: determining the water distribution state corresponding to the current moment based on the front-section pressure drop, the rear-section pressure drop, and the total pressure drop, including: when the front-section pressure drop and the rear-section pressure drop are not lower than a first preset threshold and the total pressure drop is lower than the first preset threshold, determining that the water distribution state corresponding to the current moment is flooding in the front distribution area or flooding in the rear distribution area; when the first pressure value corresponding to the current moment is less than the first pressure value corresponding to the standard state, determining that the water distribution state corresponding to the current moment is flooding in the front distribution area.

[0114] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: when the third pressure value corresponding to the current moment is greater than the third pressure value corresponding to the standard state, determining that the water distribution state corresponding to the current moment is flooding in the rear distribution area.

[0115] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: determining the water distribution state corresponding to the current moment based on the front-section pressure drop, the rear-section pressure drop, and the total pressure drop, including: when the front-section pressure drop and the total pressure drop are not lower than a second preset threshold and the rear-section pressure drop is lower than the second preset threshold, determining that the water distribution state corresponding to the current moment is flooding in the front section.

[0116] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: determining the water distribution state corresponding to the current moment based on the front-section pressure drop, the rear-section pressure drop, and the total pressure drop, including: when the rear-section pressure drop and the total pressure drop are not lower than a third preset threshold and the front-section pressure drop is not lower than the third preset threshold, determining that the water distribution state corresponding to the current moment is flooding in the rear section.

[0117] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: determining the front-section pressure drop, the rear-section pressure drop, and the total pressure drop of the flow channel based on the first pressure value, the second pressure value, and the third pressure value, including: calculating the difference between the first pressure value and the second pressure value as the front-section pressure drop; calculating the difference between the second pressure value and the third pressure value as the rear-section pressure drop; calculating the difference between the first pressure value and the third pressure value as the total pressure drop.

[0118] An embodiment of the present invention further provides a computer program product, including a computer program. Optionally, in this embodiment, when the computer program is executed by a processor, it can implement: obtaining a first pressure value, a second pressure value, and a third pressure value in the flow channel of a fuel cell at the current moment, where the first pressure value is the pressure value detected at a first preset detection point in the flow channel, the second pressure value is the pressure value detected at a second preset detection point in the flow channel, and the third pressure value is the pressure value detected at a third preset detection point in the flow channel; determining a front-segment pressure drop, a rear-segment pressure drop, and a total pressure drop of the flow channel based on the first pressure value, the second pressure value, and the third pressure value; and determining a water distribution state corresponding to the current moment based on the front-segment pressure drop, the rear-segment pressure drop, and the total pressure drop, where the water distribution state characterizes whether flooding occurs in the flow channel and the location of the flooding.

[0119] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0120] In the above embodiments of the present invention, the descriptions of the respective embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0121] In several embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of units or modules can be in an electrical or other form.

[0122] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0123] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0124] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a non-volatile storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs.

[0125] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A water distribution test method for a fuel cell, characterized in that: include: Acquire a first pressure value, a second pressure value, and a third pressure value in a flow channel of the fuel cell at a current moment, wherein the first pressure value is a pressure value detected at a first preset detection point of the flow channel, the second pressure value is a pressure value detected at a second preset detection point of the flow channel, and the third pressure value is a pressure value detected at a third preset detection point of the flow channel; Determine a front section pressure drop, a rear section pressure drop, and a total pressure drop of the flow channel based on the first pressure value, the second pressure value, and the third pressure value; Based on the front section pressure drop, the rear section pressure drop and the total pressure drop, the water distribution state corresponding to the current moment is determined, wherein the water distribution state represents whether flooding occurs in the flow channel and the location of the flooding.

2. The method according to claim 1, characterized in that The water distribution states include: standard state, flooding of the front distribution area, flooding of the front section, flooding of the rear section and flooding of the rear distribution area, wherein: The standard state indicates that there is no flooding in the flow channel; The flooding of the front flow distribution area indicates that the front flow distribution area of ​​the flow channel is blocked and flooding occurs; The front section flooding indicates that the middle and front part of the flow channel is blocked and flooding occurs; The rear section flooding indicates that the middle and rear part of the flow channel is blocked and flooding occurs; The flooding of the rear flow distribution area indicates that the rear flow distribution area of ​​the flow channel is blocked and flooding occurs.

3. The method according to claim 2, characterized in that The determining the water distribution state corresponding to the current moment based on the front section pressure drop, the rear section pressure drop and the total pressure drop includes: When the front section pressure drop and the rear section pressure drop are not lower than a first preset threshold value and the total pressure drop is lower than the first preset threshold value, determining that the water distribution state corresponding to the current moment is the front flow distribution area being flooded or the rear flow distribution area being flooded; When the first pressure value corresponding to the current moment is less than the first pressure value corresponding to the standard state, it is determined that the water distribution state corresponding to the current moment is flooding of the front flow distribution area.

4. The method according to claim 3, characterized in that: Also includes: When the third pressure value corresponding to the current moment is greater than the third pressure value corresponding to the standard state, it is determined that the water distribution state corresponding to the current moment is flooding of the rear distribution area.

5. The method according to claim 2, characterized in that: The determining the water distribution state corresponding to the current moment based on the front section pressure drop, the rear section pressure drop and the total pressure drop includes: When the front-end pressure drop and the total pressure drop are not lower than a second preset threshold value, and the rear-end pressure drop is lower than the second preset threshold value, it is determined that the water distribution state corresponding to the current moment is the front-end flooding.

6. The method according to claim 2, characterized in that The determining the water distribution state corresponding to the current moment based on the front section pressure drop, the rear section pressure drop and the total pressure drop includes: When the rear section pressure drop and the total pressure drop are not lower than a third preset threshold, and the front section pressure drop is not lower than the third preset threshold, it is determined that the water distribution state corresponding to the current moment is the rear section flooding.

7. The method according to any one of claims 1 to 6, characterized in that The determining, based on the first pressure value, the second pressure value, and the third pressure value, of the front section pressure drop, the rear section pressure drop, and the total pressure drop of the flow channel comprises: Calculating a difference between the first pressure value and the second pressure value as the front-stage pressure drop; Calculating a difference between the second pressure value and the third pressure value as the rear-stage pressure drop; A difference between the first pressure value and the third pressure value is calculated as the total pressure drop.

8. A water distribution test device for a fuel cell, characterized in that: include: an acquisition module, configured to acquire a first pressure value, a second pressure value, and a third pressure value in a flow channel of the fuel cell at a current moment, wherein the first pressure value is a pressure value detected at a first preset detection point of the flow channel, the second pressure value is a pressure value detected at a second preset detection point of the flow channel, and the third pressure value is a pressure value detected at a third preset detection point of the flow channel; A first determination module, configured to determine a front section pressure drop, a rear section pressure drop, and a total pressure drop of the flow channel based on the first pressure value, the second pressure value, and the third pressure value; The second determination module is used to determine the water distribution state corresponding to the current moment based on the front section pressure drop, the rear section pressure drop and the total pressure drop, wherein the water distribution state represents whether flooding occurs in the flow channel and the location of the flooding.

9. A non-volatile storage medium, characterized in that: The non-volatile storage medium includes a stored program, wherein when the program is executed, the device where the non-volatile storage medium is located is controlled to execute the water distribution test method for a fuel cell according to any one of claims 1 to 7.

10. A computer device, characterized in that: include: Memory and processor, The memory stores a computer program; The processor is used to execute the computer program stored in the memory, and when the computer program is run, the processor executes the water distribution test method for a fuel cell according to any one of claims 1 to 7.

11. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the water distribution testing method for a fuel cell according to any one of claims 1 to 7 is implemented.

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