Fuel cell stack pressure drop calculation method, device and equipment and storage medium
By obtaining pressure drop and flow rate curves through single-phase and multi-phase tests of fuel cell stacks, the problems of complex calculations and high costs in existing technologies are solved, and efficient and accurate pressure drop calculations are achieved.
Patent Information
- Application Number
- CN202510974032.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-15
- Publication Date
- 2025-11-07
AI Technical Summary
Existing technologies for calculating fuel cell stack voltage drop are complex, involve large grids, are time-consuming, and costly, failing to meet product development needs and requiring repeated experimental verification and correction.
By obtaining a target stack composed of a preset number of fuel cells, single-phase and multi-phase tests are conducted to obtain single-phase and multi-phase pressure drop versus flow rate curves. Combined with fitting formulas, pressure drop versus flow rate curves for any number of individual cells are generated.
It greatly reduces product development cycle and cost, improves calculation accuracy and efficiency, and provides more accurate fuel cell stack voltage drop calculation results.
Smart Images
Figure CN120914294A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of battery application, and in particular to a fuel cell stack pressure drop calculation method, device, equipment and storage medium. BACKGROUND
[0002] Proton exchange membrane fuel cell (PEMFC) is considered as one of the most promising new energy sources in the 21st century due to its green and efficient characteristics.
[0003] PEMFC single cell is mainly composed of bipolar plates and membrane electrodes, and a fuel cell stack is formed by stacking each single cell. The fuel cell stack, together with the gas supply system, thermal management system, water management system, power electronic system, control system, safety system and auxiliary system, forms a fuel cell system. Each part plays a key role to ensure the efficient, stable and safe operation of the system.
[0004] The stack is the core of the fuel cell system, responsible for converting chemical energy into electrical energy. The gas supply system provides the gas required for the reaction (usually hydrogen and oxygen or air), including a hydrogen supply system (including a hydrogen storage tank, a pressure reducing valve and a flow controller) and an air supply system (including an air compressor, a filter and a humidity regulator). The thermal management system maintains the stack operating within a suitable temperature range to prevent overheating or overcooling, and is composed of a cooling liquid circulation system (including a pump, a radiator and cooling liquid) and temperature sensors and controllers (monitoring and adjusting system temperature). The normal operation of the stack mainly includes hydrogen pressure drop, air pressure drop and cooling liquid pressure drop. The pressure drop of the stack with different numbers of stacks is different, and the pressure drop affects the operation of the components connected to the stack (air compressor, water pump, etc.). The operation of each component accessory consumes energy and affects the output of the stack.
[0005] The existing scheme is to roughly calculate the single-phase (gas phase) pressure drop of the stack (not including generated water) by numerical simulation method. However, if the multi-phase (gas-liquid, etc.) stack pressure drop numerical simulation is performed, the calculation equation is complex, the grid quantity is too large, the time consumption is long, the calculation cost is too high, and the final result needs to be repeatedly verified and corrected through experiments, which is low in efficiency and cannot meet the needs of product development. SUMMARY
[0006] The main purpose of the present application is to provide a fuel cell stack pressure drop calculation method, device, equipment and storage medium, aiming at solving the technical problems that the existing technology calculates the stack pressure drop by numerical simulation method, the calculation equation is complex, the grid quantity is too large, the time is long, the calculation cost is too high, and the final result needs to be repeatedly verified and corrected through experiments, the efficiency is low, and the product development demand cannot be met.
[0007] In a first aspect, the present application provides a fuel cell stack pressure drop calculation method, comprising the following steps: Obtain a target stack composed of a preset number of fuel cells, perform a single-phase test of pure gas supply and coolant supply on the target stack, and obtain a single-phase curve corresponding to single-phase pressure drop and flow rate; Perform power generation test on the target stack under different working conditions to obtain a multi-phase curve corresponding to multi-phase pressure drop and flow rate; According to the single-phase curve and the multi-phase curve, a single-cell flow curve of pressure drop and flow rate of any number of single cells is generated.
[0008] Optionally, the step of obtaining a target stack composed of a preset number of fuel cells, performing a single-phase test of pure gas supply and coolant supply on the target stack, and obtaining a single-phase curve corresponding to single-phase pressure drop and flow rate comprises: A target stack composed of a preset number of fuel cell stacks is obtained, and the target stack is simultaneously connected to the hydrogen cavity, air cavity and coolant cavity of the fuel cell test bench; Obtain hydrogen data, air data, coolant data and pressure drop data of different flow rates, and generate a single-phase curve corresponding to single-phase pressure drop and flow rate according to the hydrogen data, air data, coolant data and pressure drop data.
[0009] Optionally, the step of obtaining hydrogen data, air data, coolant data and pressure drop data of different flow rates, and generating a single-phase curve corresponding to single-phase pressure drop and flow rate according to the hydrogen data, air data, coolant data and pressure drop data comprises: Collect hydrogen data, air data, coolant data and pressure drop data of different flow rates through the fuel cell test bench; According to the hydrogen data, air data, coolant data and pressure drop data, fit each flow rate and pressure drop to obtain a single-phase curve corresponding to single-phase pressure drop and flow rate of each cavity.
[0010] Optionally, the step of fitting each flow rate and pressure drop according to the hydrogen data, air data, coolant data and pressure drop data to obtain a single-phase curve corresponding to single-phase pressure drop and flow rate of each cavity comprises: According to the hydrogen data, the air data, the coolant data and the pressure drop data, each flow rate and pressure drop is fitted, and a single-phase curve corresponding to the single-phase pressure drop and flow rate of each cavity is obtained by the following formula:
[0011] wherein, is the single-phase pressure drop, is the flow rate, and is a constant, related to the viscosity of the current fluid and the size of the flow channel, related to the density of the current fluid and the size of the flow channel; correspondingly,
[0012]
[0013]
[0014] wherein, is the hydrogen cavity pressure drop, is the hydrogen flow rate, and is a constant, related to the viscosity of the hydrogen and the size of the flow channel, related to the density of the hydrogen and the size of the flow channel, is the air cavity pressure drop, is the air flow rate, and is a constant, related to the viscosity of the air and the size of the flow channel, related to the density of the air and the size of the flow channel, is the coolant pressure drop, is the coolant flow rate, and is a constant, related to the viscosity of the coolant and the size of the flow channel, related to the density of the coolant and the size of the flow channel.
[0015] Optionally, the target stack is subjected to power generation tests under different working conditions to obtain a multiphase curve corresponding to the multiphase pressure drop and flow rate, including: The pressure drops of the target stack under different current densities and different flow rates of hydrogen, air and coolant are recorded by a fuel cell test bench, after fitting each data, a multiphase curve corresponding to the multiphase pressure drop and flow rate is obtained by the following formula:
[0016] wherein, is the pressure drop of the multiphase, is the flow rate, and is a constant, related to the viscosity of the current fluid and the size of the flow channel, related to the density of the current fluid and the size of the flow channel; correspondingly,
[0017]
[0018]
[0019] wherein, is the pressure drop of the hydrogen gas, is the flow rate of the hydrogen gas, and is a constant, related to the viscosity of the hydrogen gas and the size of the flow channel, related to the density of the hydrogen gas and the size of the flow channel, is the pressure drop of the air, is the flow rate of the air, and is a constant, related to the viscosity of the air and the size of the flow channel, related to the density of the air and the size of the flow channel, is the pressure drop of the coolant, is the flow rate of the coolant, and is a constant, related to the viscosity of the coolant and the size of the flow channel, related to the density of the coolant and the size of the flow channel.
[0020] Optionally, the generating the single-cell flow rate curve of the pressure drop and the flow rate of the single cell with any number of pieces according to the single-phase graph and the multiphase graph comprises: correcting the single-phase graph by the pressure drop of the multiphase graph to obtain the single-cell flow rate curve of the pressure drop and the flow rate of the single cell with any number of pieces.
[0021] Optionally, the correcting the single-phase graph by the pressure drop of the multiphase graph to obtain the single-cell flow rate curve of the pressure drop and the flow rate of the single cell with any number of pieces comprises: correcting the single-phase graph by the pressure drop of the multiphase graph to obtain the single-cell flow rate curve of the pressure drop and the flow rate of the single cell with any number of pieces by the following formula:
[0022]
[0023]
[0024]
[0025]
[0026] wherein, is an arbitrary gas pressure drop of a N-cell stack, is a flow rate, and is a constant, related to the viscosity of the current fluid and the size of the flow channel, related to the density of the current fluid and the size of the flow channel, is a coefficient of the required flow rate at different densities, is the number of stacks, is the number of cells in a stack, is the pressure drop generated by water produced by a single cell and discharged, is the coolant pressure drop of an arbitrary N-cell stack, is the coolant pressure drop of a single-phase graph, is the coolant pressure drop of a multi-phase graph, is an estimate of the pressure drop formed by water produced by an electrochemical reaction and discharged, is a single-phase pressure drop, is a multi-phase pressure drop, is a pressure drop reduced by reaction gas consumed by an electrochemical reaction.
[0027] In a second aspect, to achieve the above object, the present application further provides a fuel cell stack pressure drop calculation device, comprising: a single-phase test module for obtaining a target stack composed of a preset number of fuel cells, performing a single-phase test of simply supplying gas and coolant to the target stack, and obtaining a single-phase graph corresponding to a single-phase pressure drop and a flow rate; a multi-phase test module for performing a power generation test on the target stack under different working conditions, and obtaining a multi-phase graph corresponding to a multi-phase pressure drop and a flow rate; a single cell pressure drop calculation module for generating a single cell flow rate curve of a pressure drop and a flow rate of an arbitrary number of single cells according to the single-phase graph and the multi-phase graph.
[0028] In a third aspect, to achieve the above object, the present application provides a fuel cell stack pressure drop calculation device, which comprises a memory, a processor, and a fuel cell stack pressure drop calculation program stored in the memory and executable on the processor, and the fuel cell stack pressure drop calculation program is configured to implement the steps of the fuel cell stack pressure drop calculation method as described above.
[0029] In a fourth aspect, to achieve the above object, the present application provides a storage medium, which stores a fuel cell stack pressure drop calculation program, and the fuel cell stack pressure drop calculation program, when executed by a processor, implements the steps of the fuel cell stack pressure drop calculation method as described above.
[0030] The fuel cell stack pressure drop calculation method provided by the present application can obtain a single-phase curve corresponding to single-phase pressure drop and flow rate by performing a single-phase test on a target stack composed of a preset number of fuel cells, and can obtain a multi-phase curve corresponding to multi-phase pressure drop and flow rate by performing a power generation test on the target stack under different working conditions. The single-cell flow rate curve of pressure drop and flow rate of any number of single cells can be generated according to the single-phase curve and the multi-phase curve. The method can greatly reduce the development time and effectively reduce the product development cycle and cost, and can provide real and effective impetus for project development. The method is efficient in calculation, and the result of calculating the pressure drop of any number of stacks based on short stack test data is more accurate than the result of numerical simulation, thereby improving the accuracy and efficiency of fuel cell stack pressure drop calculation. BRIEF DESCRIPTION OF DRAWINGS
[0031] Figure 1 The device structure schematic diagram of the hardware running environment involved in the embodiment of the present application; Figure 2 The flowchart of the first embodiment of the fuel cell stack pressure drop calculation method of the present application; Figure 3 The flowchart of the second embodiment of the fuel cell stack pressure drop calculation method of the present application; Figure 4 The functional module diagram of the first embodiment of the fuel cell stack pressure drop calculation device of the present application.
[0032] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION
[0033] It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.
[0034] The solution of the embodiment of the present application is mainly: a target stack composed of a preset number of fuel cells is acquired, a single-phase test of simply supplying gas and coolant to the target stack is performed, a single-phase curve corresponding to single-phase pressure drop and flow is obtained, power generation tests of the target stack under different working conditions are performed, a multi-phase curve corresponding to multi-phase pressure drop and flow is obtained, a single-cell flow curve of pressure drop and flow of a single cell of any number of pieces is generated according to the single-phase curve and the multi-phase curve, the method can greatly reduce the development time required without the need for numerical simulation and the consumption of a large amount of resources, greatly reduces the development cycle and cost of products, provides a real and effective boost for project development, is efficient in calculation, and the result of the method of calculating the pressure drop of a stack of any number of pieces based on short stack test data is more accurate than the result of numerical simulation, the accuracy of the calculation of the pressure drop of a fuel cell stack is improved, the speed and efficiency of the calculation of the pressure drop of a fuel cell stack are improved, and the technical problem that the calculation equation is complex, the grid quantity is too large, the time is long, the calculation cost is too high, and the final result needs to be repeatedly verified and corrected through experiments in the prior art method of calculating the pressure drop of a stack through numerical simulation is solved, the efficiency is low, and the demand of product development cannot be met.
[0035] Reference Figure 1 , Figure 1 The device structure diagram of the hardware running environment involved in the embodiment of the present application is shown.
[0036] As Figure 1 shown, the device can include a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to realize the connection and communication between the components. The user interface 1003 can include a display screen (Display) and an input unit such as a keyboard (Keyboard). The optional user interface 1003 can also include a standard wired interface and a wireless interface. The network interface 1004 can optionally include a standard wired interface and a wireless interface (such as a Wi-Fi interface). The memory 1005 can be a high-speed RAM memory or a stable memory (Non-Volatile Memory), such as a magnetic disk memory. The memory 1005 can also be an independent storage device from the aforementioned processor 1001.
[0037] Those skilled in the art can understand that Figure 1 the device structure shown in the foregoing embodiments does not constitute a limitation on the device, and can include more or fewer components than shown, or combine certain components, or different component arrangements.
[0038] As Figure 1As shown, the memory 1005 as a storage medium can include an operating device, a network communication module, a user interface module, and a fuel cell stack pressure drop calculation program.
[0039] The device of the present application calls the fuel cell stack pressure drop calculation program stored in the memory 1005 by the processor 1001, and performs the following operations: Obtain a target stack composed of a preset number of fuel cells, perform a single-phase test of simply supplying gas and coolant to the target stack, and obtain a single-phase curve corresponding to the single-phase pressure drop and flow rate; Perform power generation tests on the target stack under different working conditions to obtain a multi-phase curve corresponding to the multi-phase pressure drop and flow rate; Generate a single-cell flow rate curve of the pressure drop and flow rate of any number of single cells according to the single-phase curve and the multi-phase curve.
[0040] The device of the present application calls the fuel cell stack pressure drop calculation program stored in the memory 1005 by the processor 1001, and performs the following operations: Obtain a target stack composed of a preset number of fuel cell stacks, and simultaneously connect the target stack to the hydrogen cavity, air cavity and coolant cavity of the fuel cell test bench; Obtain hydrogen data, air data, coolant data and pressure drop data of different flow rates, and generate a single-phase curve corresponding to the single-phase pressure drop and flow rate according to the hydrogen data, the air data, the coolant data and the pressure drop data.
[0041] The device of the present application calls the fuel cell stack pressure drop calculation program stored in the memory 1005 by the processor 1001, and performs the following operations: Collect hydrogen data, air data, coolant data and pressure drop data of different flow rates through the fuel cell test bench; According to the hydrogen data, the air data, the coolant data and the pressure drop data, fit each flow rate and pressure drop, and obtain a single-phase curve corresponding to the single-phase pressure drop and flow rate of each cavity.
[0042] The device of the present application calls the fuel cell stack pressure drop calculation program stored in the memory 1005 by the processor 1001, and performs the following operations: According to the hydrogen data, the air data, the coolant data and the pressure drop data, fit each flow rate and pressure drop, and obtain a single-phase curve corresponding to the single-phase pressure drop and flow rate of each cavity by the following formula:
[0043] Wherein, is the single-phase pressure drop, is the flow rate, and is a constant, related to the viscosity and flow channel size of the current fluid, related to the density and flow channel size of the current fluid; correspondingly,
[0044]
[0045]
[0046] wherein, is the pressure drop of the hydrogen cavity, is the hydrogen flow rate, and is a constant, related to the viscosity and flow channel size of the hydrogen, related to the density and flow channel size of the hydrogen, is the pressure drop of the air cavity, is the air flow rate, and is a constant, related to the viscosity and flow channel size of the air, related to the density and flow channel size of the air, is the pressure drop of the coolant, is the coolant flow rate, and is a constant, related to the viscosity and flow channel size of the coolant, related to the density and flow channel size of the coolant.
[0047] The device of the present application further performs the following operations by calling the fuel cell stack pressure drop calculation program stored in the memory 1005 through the processor 1001: The pressure drops of the target stack under different current densities and different flow rates of hydrogen, air and coolant are recorded by the fuel cell test bench, and after fitting each data, the multiphase pressure drop corresponding to the flow rate is obtained by the following formula:
[0048] wherein, is the multiphase pressure drop, is the flow rate, and is a constant, related to the viscosity and flow channel size of the current fluid, related to the density and flow channel size of the current fluid; correspondingly,
[0049]
[0050]
[0051] wherein, is the hydrogen gas cavity pressure drop, is the hydrogen gas flow rate, and is a constant, is related to the viscosity of the hydrogen gas and the flow channel size, is related to the density of the hydrogen gas and the flow channel size, is the air cavity pressure drop, is the air flow rate, and is a constant, is related to the viscosity of the air and the flow channel size, is related to the density of the air and the flow channel size, is the coolant pressure drop, is the coolant flow rate, and is a constant, is related to the viscosity of the coolant and the flow channel size, is related to the density of the coolant and the flow channel size.
[0052] The device of the present application further performs the following operations by the processor 1001 invoking the fuel cell stack pressure drop calculation program stored in the memory 1005: The single-phase curve is corrected for pressure drop by the multi-phase curve to obtain a single cell flow rate curve of pressure drop versus flow rate for a single cell of any number of pieces.
[0053] The device of the present application further performs the following operations by the processor 1001 invoking the fuel cell stack pressure drop calculation program stored in the memory 1005: The single-phase curve is corrected for pressure drop by the multi-phase curve to obtain a single cell flow rate curve of pressure drop versus flow rate for a single cell of any number of pieces by the following equation:
[0054]
[0055]
[0056]
[0057]
[0058] wherein, is the gas pressure drop for a stack of any number of pieces, is the flow rate, and is a constant, related to the viscosity of the current fluid and the size of the flow channel, related to the density of the current fluid and the size of the flow channel, is the coefficient of the required flow rate at different densities, is the number of stacks, is the number of single cells in the stack, is the pressure drop generated by the single cell producing water and discharging the generated water, is the coolant pressure drop of the arbitrary N-piece stack, is the coolant pressure drop of the single-phase graph, is the coolant pressure drop of the multi-phase graph, is the pressure drop estimate formed by the water produced by the electrochemical reaction and discharged, is the single-phase pressure drop, is the multi-phase pressure drop, is the pressure drop reduced by the reaction gas consumed by the electrochemical reaction.
[0059] The embodiment obtains a target stack composed of a preset number of fuel cells, performs a single-phase test of simply supplying gas and coolant to the target stack, and obtains a single-phase graph corresponding to the single-phase pressure drop and the flow rate. The target stack is subjected to power generation test under different working conditions to obtain a multi-phase graph corresponding to the multi-phase pressure drop and the flow rate. The single-cell flow rate curve of the pressure drop and the flow rate of the single cell with an arbitrary number of pieces is generated according to the single-phase graph and the multi-phase graph. The method does not need to consume a large amount of resources and time for numerical simulation, greatly reduces the development time required, effectively reduces the product development cycle and cost, provides real and effective promotion for project development, is efficient in calculation, and the result of the method of calculating the pressure drop of the stack with an arbitrary number of pieces based on the short stack test data is more accurate than the result of numerical simulation, which improves the accuracy of fuel cell stack pressure drop calculation and improves the speed and efficiency of fuel cell stack pressure drop calculation.
[0060] Based on the above hardware structure, the fuel cell stack pressure drop calculation method embodiment of the application is proposed.
[0061] Referring to Figure 2 , Figure 2 is the flowchart of the first embodiment of the fuel cell stack pressure drop calculation method of the application.
[0062] In the first embodiment, the fuel cell stack pressure drop calculation method comprises the following steps: Step S10, a target stack composed of a preset number of fuel cells is obtained, a single-phase test of simply supplying gas and coolant to the target stack is performed, and a single-phase graph corresponding to the single-phase pressure drop and the flow rate is obtained.
[0063] It should be noted that a corresponding stack can be formed by a preset number of fuel cells as a target stack, and then the target stack is subjected to a single-phase test of simple gas supply and cooling liquid supply, so as to obtain a single-phase curve corresponding to the single-phase pressure drop and flow.
[0064] In a specific implementation, a short stack can be formed by a graphite or metal etched plate bipolar plate and a membrane electrode in a product development process, and a single-phase test of simple gas supply and cooling liquid supply is performed on the short stack to obtain a curve of single-phase pressure drop and flow.
[0065] Step S20, performing power generation test on the target stack under different working conditions to obtain a multi-phase curve corresponding to the multi-phase pressure drop and flow.
[0066] It should be understood that the power generation test on the target stack under different working conditions can obtain a multi-phase curve corresponding to the multi-phase pressure drop and flow, that is, the data can be obtained by performing the experiment of power generation under different working conditions of the short stack, and the curve of multi-phase (mixed) pressure drop and flow can be obtained.
[0067] Step S30, generating a single cell flow curve of pressure drop and flow of any number of single cells according to the single-phase curve and the multi-phase curve.
[0068] It can be understood that the single cell flow curve of pressure drop and flow of any number of single cells can be generated according to the single-phase curve and the multi-phase curve.
[0069] In a specific implementation, the single cell flow curve is obtained by the above two curves, specifically: the curve of pressure drop and flow after the multi-phase pressure drop is subtracted from the single-phase pressure drop and the pressure drop generated by the related unspent gas and the pressure drop generated by excluding water, the single-phase pressure drop and flow curve is corrected to obtain the single cell pressure drop and flow curve, and finally the above results or the pressure drop and flow curve of any number of single cells are combined; the obtained pressure drop and the components connected with the stack are matched and designed, so that a high-efficiency fuel cell system can be designed, the development time required is greatly reduced, the product development cycle and cost are effectively reduced, and the project development is effectively promoted.
[0070] The embodiment obtains a target stack composed of a preset number of fuel cells, performs a single-phase test of simply supplying gas and coolant to the target stack, and obtains a single-phase curve corresponding to single-phase pressure drop and flow rate; performs power generation test of the target stack under different working conditions, and obtains a multi-phase curve corresponding to multi-phase pressure drop and flow rate; and generates a single-cell flow rate curve of pressure drop and flow rate of any number of single cells according to the single-phase curve and the multi-phase curve. The method can greatly reduce the development time required, effectively reduce the product development cycle and cost, provide real and effective impetus for project development, and is efficient in calculation. The result of the method of calculating the pressure drop of any number of stacks based on short stack test data is more accurate than the result of numerical simulation, improves the accuracy of fuel cell stack pressure drop calculation, and improves the speed and efficiency of fuel cell stack pressure drop calculation.
[0071] Further, Figure 3 The flowchart of the second embodiment of the fuel cell stack pressure drop calculation method of the application is shown in Figure 3 The second embodiment of the fuel cell stack pressure drop calculation method of the application is proposed based on the first embodiment. In the embodiment, the step S10 specifically includes the following steps: Step S11, obtaining a target stack composed of a preset number of fuel cell stacks, and simultaneously connecting the target stack to a hydrogen cavity, an air cavity and a coolant cavity of a fuel cell test bench.
[0072] It should be noted that after determining the target stack composed of a preset number of fuel cell stacks, the target stack can be simultaneously connected to the hydrogen cavity, the air cavity and the coolant cavity of the fuel cell test bench. Step S12, obtaining hydrogen data, air data, coolant data and pressure drop data of different flow rates, and generating a single-phase curve corresponding to single-phase pressure drop and flow rate according to the hydrogen data, the air data, the coolant data and the pressure drop data.
[0073] It can be understood that after obtaining the hydrogen data, the air data, the coolant data and the pressure drop data of different flow rates, a single-phase curve corresponding to single-phase pressure drop and flow rate can be generated according to the hydrogen data, the air data, the coolant data and the pressure drop data.
[0074] Further, the step S12 specifically includes the following steps: Collecting hydrogen data, air data, coolant data and pressure drop data of different flow rates by the fuel cell test bench; Fitting each flow rate and pressure drop according to the hydrogen data, the air data, the coolant data and the pressure drop data, and obtaining a single-phase curve corresponding to single-phase pressure drop and flow rate of each cavity.
[0075] It can be understood that, after collecting hydrogen data, air data, coolant data and pressure drop data of different flow rates by the fuel cell test bench, single-phase pressure drop and flow rate curves of each cavity can be obtained by fitting each flow rate and pressure drop.
[0076] Further, the step of fitting each flow rate and pressure drop according to the hydrogen data, the air data, the coolant data and the pressure drop data to obtain a single-phase curve corresponding to the single-phase pressure drop and flow rate of each cavity specifically comprises the following steps: fitting each flow rate and pressure drop according to the hydrogen data, the air data, the coolant data and the pressure drop data, and obtaining a single-phase curve corresponding to the single-phase pressure drop and flow rate of each cavity by the following formula:
[0077] wherein, is the single-phase pressure drop, is the flow rate, and is a constant, is related to the viscosity and flow channel size of the current fluid, is related to the density and flow channel size of the current fluid; Correspondingly,
[0078]
[0079]
[0080] wherein, is the hydrogen cavity pressure drop, is the hydrogen flow rate, and is a constant, is related to the viscosity and flow channel size of the hydrogen, is related to the density and flow channel size of the hydrogen, is the air cavity pressure drop, is the air flow rate, and is a constant, is related to the viscosity and flow channel size of the air, is related to the density and flow channel size of the air, is the coolant pressure drop, is the coolant flow rate, and is a constant, is related to the viscosity and flow channel size of the coolant, is related to the density and flow channel size of the coolant.
[0081] It should be noted that the single-phase curve of each cavity corresponding to the single-phase pressure drop and flow rate can be calculated by the above formula.
[0082] In a specific implementation, the single cells of n fuel cells are assembled into a short stack, and are connected to a fuel cell test bench. Different mass flow rates of gas / liquid are introduced into the hydrogen cavity, air cavity, and cooling liquid cavity. In order to protect the membrane electrode, when only air is introduced, the hydrogen cavity is introduced into nitrogen gas with the same pressure. Similarly, when only hydrogen is introduced, the air cavity is introduced into nitrogen gas with the same pressure. The cooling liquid cavity can be simultaneously introduced into different flow rates of cooling liquid with the hydrogen / air cavity. The test bench collects the data of hydrogen, air, and cooling liquid with different flow rates and pressure drops (cavity inlet pressure-outlet pressure). The single-phase pressure drop and flow rate curve of each cavity is obtained by fitting each flow rate and pressure drop.
[0083] Correspondingly, the step S20 specifically includes the following steps: The pressure drop of the target stack under different current densities and different flow rates of hydrogen, air, and cooling liquid is recorded by the fuel cell test bench. After fitting each data, the multiphase curve corresponding to the multiphase pressure drop and flow rate is obtained by the following formula:
[0084] wherein, is the multiphase pressure drop, is the flow rate, and are constants, is related to the viscosity and flow channel size of the current fluid, is related to the density and flow channel size of the current fluid; Correspondingly,
[0085]
[0086]
[0087] wherein, is the hydrogen cavity pressure drop, is the hydrogen flow rate, and are constants, is related to the viscosity and flow channel size of the hydrogen, is related to the density and flow channel size of the hydrogen, is the air cavity pressure drop, is the air flow rate, and are constants, is related to the viscosity and flow channel size of the air, Related to air density and channel size, To cool the hydraulic pressure drop, This refers to the coolant flow rate. and It is a constant. It is related to the viscosity of the coolant and the size of the flow channel. It is related to the density of the coolant and the size of the flow channel.
[0088] It should be noted that fuel cell tests were conducted on a test bench using hydrogen, air, and coolant flow rates with the same calculated single-phase pressure drop at different current densities, and the corresponding pressure drop values were recorded. Because the fuel cell undergoes an electrochemical reaction, the gas is consumed, releasing electricity, generating water, and releasing heat. The reaction process is as follows: H2+ O2 → H2O + Heat The water generated in the reaction is discharged through the bipolar plate flow channel of the fuel cell, and the heat is carried away through the bipolar plate cooling chamber. By fitting the pressure drop and flow rate values obtained after the reaction, the pressure drop-flow rate curve after the electrochemical reaction of the fuel cell is obtained, that is, the multiphase curve diagram corresponding to the multiphase pressure drop and flow rate.
[0089] Accordingly, step S30 specifically includes the following steps: By correcting the voltage drop of the single-phase curve using the multiphase curve, a single-cell flow rate curve of voltage drop versus flow rate for any number of cells can be obtained.
[0090] It should be noted that, since the electrochemical reaction consumes and generates water, the water discharged from the bipolar plate channel will cause a pressure drop. Therefore, pressure drop correction is required. That is, the single-phase curve is corrected by the multiphase curve to obtain the single-cell flow curve of pressure drop and flow rate for any number of cells.
[0091] Furthermore, the step involves correcting the voltage drop of the single-phase curve using the multiphase curve to obtain a single-cell flow rate curve for any number of cells, specifically including the following steps: By correcting the voltage drop of the single-phase curve using the multiphase curve, the voltage drop versus flow rate curve of a single cell with any number of cells is obtained using the following formula:
[0092]
[0093]
[0094]
[0095]
[0096] wherein, is the gas pressure drop for an arbitrary number of N-patch stacks, is the flow rate, and is a constant, related to the viscosity of the current fluid and the size of the flow channel, related to the density of the current fluid and the size of the flow channel, is the coefficient of the required flow rate at different densities, is the number of stacks, is the number of patches in a stack, is the pressure drop generated by the water produced by a single cell and discharged, is the coolant pressure drop for an arbitrary N-patch stack, is the coolant pressure drop for a single-phase graph, is the coolant pressure drop for a multi-phase graph, is the estimated pressure drop formed by the water produced by the electrochemical reaction and discharged, is the single-phase pressure drop, is the multi-phase pressure drop, is the pressure drop reduced by the reaction gas consumed by the electrochemical reaction.
[0097] It should be noted that the water produced by the electrochemical reaction can be calculated by the reaction equation:
[0098] wherein, is the rate of water, is the flow rate of hydrogen, is the coefficient of the required flow rate of hydrogen at different densities, S is in mol / s, and the water rate generated by a single-patch cell is:
[0099] wherein, is the water rate generated by a single-patch cell, is the rate of water, is the total number of single-patch cells.
[0100] In a specific implementation, the pressure drop reduced by the reaction gas consumed by the electrochemical reaction is:
[0101] The proportion of is:
[0102] wherein, is the proportion of , is the single-phase pressure drop, the pressure drop due to the consumption of the reaction gas by the electrochemical reaction.
[0103] The pressure drop not consumed by the n-cell short stack is:
[0104] where, is the pressure drop not consumed by the n-cell short stack, is the single phase pressure drop, is the pressure drop due to the consumption of the reaction gas by the electrochemical reaction, is the flow rate, and is a constant, related to the viscosity of the current fluid and the size of the flow channel, related to the density of the current fluid and the size of the flow channel, is a coefficient of the required flow rate at different densities.
[0105] Correspondingly, the pressure drop not consumed by the single-cell short stack is:
[0106] where, is the pressure drop not consumed by the single-cell short stack, is the total number of single cells, is the flow rate, and is a constant, related to the viscosity of the current fluid and the size of the flow channel, related to the density of the current fluid and the size of the flow channel, is a coefficient of the required flow rate at different densities.
[0107] The pressure drop formed by the generation and discharge of water due to the electrochemical reaction can be estimated as:
[0108] The proportion is:
[0109] where, is the proportion of , is the estimate of the pressure drop formed by the generation and discharge of water due to the electrochemical reaction, is the multi-phase pressure drop.
[0110] The pressure drop generated by the generation and discharge of water in a single cell is:
[0111] The pressure drop of the short stack (n pieces) single piece gas is:
[0112] Since the coolant does not participate in the reaction, there is no other pressure drop, and the pressure drop of the short stack (n pieces) single piece coolant is:
[0113] According to the pressure drop of the single cell, the gas pressure drop of any N piece stack is further calculated:
[0114] The coolant pressure drop of any N piece stack is:
[0115] It should be noted that, in order to meet the development of the stack product, the pressure drop and flow curve of each state of the stack need to be provided, and matched with the MAP graph (air compressor pressure-flow curve graph) of the accessory, and the product with high performance, low accessory energy consumption and high net output power of the stack is developed. In the early stage of design, short stacks composed of different bipolar plates and membrane electrode assemblies can be simultaneously prepared, and fuel cell stacks matching air compressors and other related accessories can be quickly designed, greatly shortening the product development cycle. Compared with numerical simulation calculation, the required software and hardware cost millions of dollars, consume a lot of computing resources, and may not necessarily calculate the result (large grid and very complex mathematical model), which saves a lot of cost and significantly reduces the development cost.
[0116] In the embodiment, by the above scheme, the target stack composed of a preset number of fuel cell stacks is obtained, the target stack is simultaneously connected to the hydrogen cavity, the air cavity and the coolant cavity of the fuel cell test bench, hydrogen data, air data, coolant data and pressure drop data of different flow rates are obtained, and a single-phase curve graph corresponding to single-phase pressure drop and flow rate is generated according to the hydrogen data, the air data, the coolant data and the pressure drop data. The single-phase curve graph corresponding to the single-phase pressure drop and the flow rate can be obtained, the accuracy of the fuel cell stack pressure drop calculation is improved, and the speed and efficiency of the fuel cell stack pressure drop calculation are improved.
[0117] Correspondingly, the application further provides a fuel cell stack pressure drop calculation device.
[0118] Reference Figure 4 , Figure 4 It is a functional module diagram of the first embodiment of the fuel cell stack pressure drop calculation device of the application.
[0119] The fuel cell stack pressure drop calculation device in the first embodiment of the application comprises: The single-phase test module 10 is used to obtain a target stack composed of a preset number of fuel cells, perform a single-phase test of pure gas supply and coolant supply on the target stack, and obtain a single-phase curve corresponding to single-phase pressure drop and flow rate.
[0120] The multi-phase test module 20 is used to perform power generation tests on the target stack under different working conditions, and obtain a multi-phase curve corresponding to multi-phase pressure drop and flow rate.
[0121] The single-cell pressure drop calculation module 30 is used to generate a single-cell flow rate curve of pressure drop and flow rate of a single cell with any number of pieces according to the single-phase curve and the multi-phase curve.
[0122] The single-phase test module 10 is also used to obtain a target stack composed of a preset number of fuel cell stacks, simultaneously connect the target stack to a hydrogen cavity, an air cavity and a coolant cavity of a fuel cell test bench, obtain hydrogen data, air data, coolant data and pressure drop data of different flow rates, and generate a single-phase curve corresponding to single-phase pressure drop and flow rate according to the hydrogen data, the air data, the coolant data and the pressure drop data.
[0123] The single-phase test module 10 is also used to collect hydrogen data, air data, coolant data and pressure drop data of different flow rates through the fuel cell test bench; and fit each flow rate and pressure drop according to the hydrogen data, the air data, the coolant data and the pressure drop data, to obtain a single-phase curve corresponding to single-phase pressure drop and flow rate of each cavity.
[0124] The single-phase test module 10 is also used to fit each flow rate and pressure drop according to the hydrogen data, the air data, the coolant data and the pressure drop data, and obtain a single-phase curve corresponding to single-phase pressure drop and flow rate of each cavity by the following formula:
[0125] wherein, is single-phase pressure drop, is flow rate, and is a constant, is related to the viscosity and flow channel size of the current fluid, is related to the density and flow channel size of the current fluid; Correspondingly,
[0126]
[0127]
[0128] wherein, is the hydrogen cavity pressure drop, is the hydrogen flow rate, and is a constant, is related to the viscosity of hydrogen and the flow channel size, is related to the density of hydrogen and the flow channel size, is the air cavity pressure drop, is the air flow rate, and is a constant, is related to the viscosity of air and the flow channel size, is related to the density of air and the flow channel size, is the coolant pressure drop, is the coolant flow rate, and is a constant, is related to the viscosity of coolant and the flow channel size, is related to the density of coolant and the flow channel size.
[0129] The multiphase test module 20 is further configured to record the pressure drops of the target stack under different current densities and different flow rates of hydrogen, air and coolant by the fuel cell test bench, and obtain a multiphase curve of the multiphase pressure drop corresponding to the flow rate by fitting each data according to the following formula:
[0130] wherein, is the multiphase pressure drop, is the flow rate, and is a constant, is related to the viscosity of the current fluid and the flow channel size, is related to the density of the current fluid and the flow channel size. Correspondingly,
[0131]
[0132]
[0133] wherein, is the hydrogen cavity pressure drop, is the hydrogen flow rate, and is a constant, is related to the viscosity of hydrogen and the flow channel size, is related to the density of hydrogen and the flow channel size, is the air cavity pressure drop, is constant for air flow, and is constant for air flow, is related to the viscosity of air and the size of the flow channel, is related to the density of air and the size of the flow channel, is the cooling hydraulic pressure drop, is the cooling fluid flow, and is constant for cooling fluid flow, is related to the viscosity of cooling fluid and the size of the flow channel, is related to the density of cooling fluid and the size of the flow channel.
[0134] The single cell pressure drop calculation module 30 is further configured to correct the single-phase graph by the multi-phase graph to obtain a single cell flow curve of the pressure drop and flow of the single cell with any number of pieces.
[0135] The single cell pressure drop calculation module 30 is further configured to correct the single-phase graph by the multi-phase graph to obtain a single cell flow curve of the pressure drop and flow of the single cell with any number of pieces by the following formula:
[0136]
[0137]
[0138]
[0139]
[0140] wherein, is the gas pressure drop of the stack with any number of pieces, is the flow, and is constant for the current fluid flow, is related to the viscosity of the current fluid and the size of the flow channel, is related to the density of the current fluid and the size of the flow channel, is the coefficient of the required flow at different densities, is the number of stacks, is the number of pieces of single cells in the stack, is the pressure drop generated by the single cell generating water and discharging, is the cooling fluid pressure drop of the stack with any number of pieces, is the cooling fluid pressure drop of the single-phase graph, is the cooling fluid pressure drop of the multi-phase graph, is the pressure drop estimation formed by the water generated by the electrochemical reaction and discharged, is the pressure drop estimation formed by the water generated by the electrochemical reaction and discharged, for single-phase pressure drop, for multi-phase pressure drop, for pressure drop reduced due to reaction gas consumed by electrochemical reaction.
[0141] The steps implemented by each functional module of the fuel cell stack pressure drop calculation device can refer to the steps of each embodiment of the fuel cell stack pressure drop calculation method, which will not be described here.
[0142] In addition, an embodiment of the present application also provides a storage medium, wherein the storage medium stores a fuel cell stack pressure drop calculation program, and the fuel cell stack pressure drop calculation program is executed by a processor to implement the following operations: acquire a target stack composed of a preset number of fuel cells, perform a single-phase test on the target stack by simply supplying gas and coolant, and obtain a single-phase curve corresponding to single-phase pressure drop and flow rate; perform a power generation test on the target stack under different working conditions, and obtain a multi-phase curve corresponding to multi-phase pressure drop and flow rate; generate a single-cell flow rate curve of pressure drop and flow rate of any number of single cells according to the single-phase curve and the multi-phase curve.
[0143] Further, the fuel cell stack pressure drop calculation program is executed by the processor to further implement the following operations: acquire a target stack composed of a preset number of fuel cell stacks, and simultaneously connect the target stack to a hydrogen cavity, an air cavity and a coolant cavity of a fuel cell test bench; acquire hydrogen data, air data, coolant data and pressure drop data of different flow rates, and generate a single-phase curve corresponding to single-phase pressure drop and flow rate according to the hydrogen data, the air data, the coolant data and the pressure drop data.
[0144] Further, the fuel cell stack pressure drop calculation program is executed by the processor to further implement the following operations: acquire hydrogen data, air data, coolant data and pressure drop data of different flow rates through the fuel cell test bench; fit flow rate and pressure drop according to the hydrogen data, the air data, the coolant data and the pressure drop data, and obtain a single-phase curve corresponding to single-phase pressure drop and flow rate of each cavity.
[0145] Further, the fuel cell stack pressure drop calculation program is executed by the processor to further implement the following operations: fit flow rate and pressure drop according to the hydrogen data, the air data, the coolant data and the pressure drop data, and obtain a single-phase curve corresponding to single-phase pressure drop and flow rate of each cavity by the following formula:
[0146] wherein, is the single-phase pressure drop, is the flow rate, and is a constant, is related to the viscosity of the current fluid and the flow channel size, is related to the density of the current fluid and the flow channel size; correspondingly,
[0147]
[0148]
[0149] wherein, is the hydrogen gas cavity pressure drop, is the hydrogen gas flow rate, and is a constant, is related to the viscosity of the hydrogen gas and the flow channel size, is related to the density of the hydrogen gas and the flow channel size, is the air cavity pressure drop, is the air flow rate, and is a constant, is related to the viscosity of the air and the flow channel size, is related to the density of the air and the flow channel size, is the coolant pressure drop, is the coolant flow rate, and is a constant, is related to the viscosity of the coolant and the flow channel size, is related to the density of the coolant and the flow channel size.
[0150] Further, the fuel cell stack pressure drop calculation program, when executed by the processor, further implements the following operations: The pressure drops of the target stack under different current densities and different flow rates of hydrogen gas, air and coolant are recorded by the fuel cell test bench, and after fitting each data, the multi-phase pressure drop corresponding to the flow rate is obtained by the following formula:
[0151] wherein, is the multi-phase pressure drop, is the flow rate, and is a constant, is related to the viscosity of the current fluid and the flow channel size, is related to the density of the current fluid and the flow channel size; Accordingly,
[0152]
[0153]
[0154] wherein, is the hydrogen gas cavity pressure drop, is the hydrogen gas flow rate, and is a constant, is related to the viscosity of the hydrogen gas and the flow channel size, is related to the density of the hydrogen gas and the flow channel size, is the air cavity pressure drop, is the air flow rate, and is a constant, is related to the viscosity of the air and the flow channel size, is related to the density of the air and the flow channel size, is the coolant pressure drop, is the coolant flow rate, and is a constant, is related to the viscosity of the coolant and the flow channel size, is related to the density of the coolant and the flow channel size.
[0155] Further, the fuel cell stack pressure drop calculation program, when executed by the processor, further implements the following operations: The single-phase graph is pressure-drop corrected by the multi-phase graph to obtain a single-cell flow rate curve of the pressure drop and flow rate of a single cell of any number of pieces.
[0156] Further, the fuel cell stack pressure drop calculation program, when executed by the processor, further implements the following operations: The single-phase graph is pressure-drop corrected by the multi-phase graph to obtain a single-cell flow rate curve of the pressure drop and flow rate of a single cell of any number of pieces by the following formula:
[0157]
[0158]
[0159]
[0160]
[0161] wherein, is any Gas pressure drop of the cell stack, is the flow rate, and is a constant, related to the viscosity of the current fluid and the size of the flow channel, related to the density of the current fluid and the size of the flow channel, is a coefficient of the required flow rate at different densities, is the number of stacks, is the number of cells in the stack, is the pressure drop generated by the water produced by a single cell and discharged, is the coolant pressure drop of an arbitrary N-stack, is the coolant pressure drop of a single-phase graph, is the coolant pressure drop of a multi-phase graph, is the estimated pressure drop formed by the water produced by the electrochemical reaction and discharged, is the single-phase pressure drop, is the multi-phase pressure drop, is the pressure drop reduced by the reaction gas consumed by the electrochemical reaction.
[0162] Those skilled in the art can understand that all or part of the steps in the above-mentioned implementation method can be completed by instructing the relevant hardware through a program stored in a storage medium, including a plurality of instructions for causing a device (which can be a single-chip microcomputer, a chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application; and the aforementioned storage medium is a computer-readable storage medium, including: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.
[0163] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or other elements inherent to such a process, method, article or apparatus. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or apparatus including the element.
[0164] The above-mentioned serial numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.
[0165] The above merely describes the preferred embodiments of the present application, and is not intended to limit the patent scope of the present application, and any equivalent structure or equivalent process conversion, or direct or indirect application in other related technical fields, which are made by using the content of the present application specification and drawings, are also included in the patent protection scope of the present application.
Claims
1. A method of calculating a pressure drop of a fuel cell stack, characterized by, The fuel cell stack pressure drop calculation method comprises: Obtaining a target stack composed of a preset number of fuel cells, performing a single-phase test on the target stack by simply supplying gas and coolant, and obtaining a single-phase curve corresponding to single-phase pressure drop and flow rate; Performing power generation tests on the target stack under different working conditions to obtain a multi-phase curve corresponding to multi-phase pressure drop and flow rate; Generating a single-cell flow curve of pressure drop and flow rate of any number of single cells according to the single-phase curve and the multi-phase curve.
2. The method of claim 1, wherein, The method for obtaining a target stack composed of a preset number of fuel cells, performing a single-phase test on the target stack by simply supplying gas and coolant, and obtaining a single-phase curve corresponding to single-phase pressure drop and flow rate comprises: Obtaining a target stack composed of a preset number of fuel cell stacks, and simultaneously connecting the target stack to a hydrogen cavity, an air cavity, and a coolant cavity of a fuel cell test bench; Obtaining hydrogen data, air data, coolant data, and pressure drop data of different flow rates, and generating a single-phase curve corresponding to single-phase pressure drop and flow rate according to the hydrogen data, the air data, the coolant data, and the pressure drop data.
3. The method of claim 2, wherein the step of calculating the fuel cell stack voltage drop comprises the step of: calculating the fuel cell stack voltage drop based on the fuel cell stack voltage, the fuel cell stack current, and the fuel cell stack temperature. The method for obtaining hydrogen data, air data, coolant data, and pressure drop data of different flow rates, and generating a single-phase curve corresponding to single-phase pressure drop and flow rate according to the hydrogen data, the air data, the coolant data, and the pressure drop data comprises: Collecting hydrogen data, air data, coolant data, and pressure drop data of different flow rates through the fuel cell test bench; Fitting each flow rate and pressure drop according to the hydrogen data, the air data, the coolant data, and the pressure drop data to obtain a single-phase curve corresponding to single-phase pressure drop and flow rate of each cavity.
4. The fuel cell stack voltage drop calculation method as described in claim 3, characterized in that, The method for fitting each flow rate and pressure drop according to the hydrogen data, the air data, the coolant data, and the pressure drop data to obtain a single-phase curve corresponding to single-phase pressure drop and flow rate of each cavity comprises: Fitting each flow rate and pressure drop according to the hydrogen data, the air data, the coolant data, and the pressure drop data to obtain a single-phase curve corresponding to single-phase pressure drop and flow rate of each cavity by the following formula: wherein, is the single phase pressure drop, is the flow rate, and is a constant, is related to the viscosity of the current fluid and the flow passage size, is related to the density of the current fluid and the flow passage size; Correspondingly, wherein, is the hydrogen gas cavity pressure drop, is the hydrogen gas flow rate, and is a constant, is related to the viscosity of the hydrogen gas and the flow channel size, is related to the density of the hydrogen gas and the flow channel size, is the air cavity pressure drop, is the air flow rate, and is a constant, is related to the viscosity of the air and the flow channel size, is related to the density of the air and the flow channel size, is the coolant pressure drop, is the coolant flow rate, and is a constant, is related to the viscosity of the coolant and the flow channel size, is related to the density of the coolant and the flow channel size.
5. The method of claim 1, wherein, The method for performing power generation tests on the target stack under different working conditions to obtain a multi-phase curve corresponding to multi-phase pressure drop and flow rate comprises: Recording the pressure drop of the target stack under different current densities and different flow rates of hydrogen, air, and coolant through a fuel cell test bench, fitting each data, and obtaining a multi-phase curve corresponding to multi-phase pressure drop and flow rate by the following formula: wherein, is the polyphase pressure drop, is the flow rate, and is a constant, is related to the viscosity of the current fluid and the flow passage size, is related to the density of the current fluid and the flow passage size; Correspondingly, wherein, is the hydrogen gas cavity pressure drop, is the hydrogen gas flow rate, and is a constant, is related to the viscosity of the hydrogen gas and the flow passage size, is related to the density of the hydrogen gas and the flow passage size, is the air cavity pressure drop, is the air flow rate, and is a constant, is related to the viscosity of the air and the flow passage size, is related to the density of the air and the flow passage size, is the coolant pressure drop, is the coolant flow rate, and is a constant, is related to the viscosity of the coolant and the flow passage size, is related to the density of the coolant and the flow passage size.
6. The method of claim 1, wherein, The method for generating a single-cell flow curve of pressure drop and flow rate of any number of single cells according to the single-phase curve and the multi-phase curve comprises: Performing pressure drop correction on the single-phase curve through the multi-phase curve to obtain a single-cell flow curve of pressure drop and flow rate of any number of single cells.
7. The method of claim 6, wherein the step of calculating the fuel cell stack voltage drop comprises the step of: The method for performing pressure drop correction on the single-phase curve through the multi-phase curve to obtain a single-cell flow curve of pressure drop and flow rate of any number of single cells comprises: Performing pressure drop correction on the single-phase curve through the multi-phase curve to obtain a single-cell flow curve of pressure drop and flow rate of any number of single cells by the following formula: wherein, is an arbitrary gas pressure drop of a cell stack, is a flow rate, and is a constant, related to the viscosity of the current fluid and the flow channel size, related to the density of the current fluid and the flow channel size, is a coefficient of the required flow rate at different densities, is the number of stacks, is the number of cells in a stack, is the pressure drop generated by the water produced by a single cell and discharged, is the coolant pressure drop of an arbitrary N-stack, is the coolant pressure drop of a single-phase graph, is the coolant pressure drop of a multi-phase graph, is an estimate of the pressure drop formed by the water produced by the electrochemical reaction and discharged, is a single-phase pressure drop, is a multi-phase pressure drop, is a pressure drop reduced by the reaction gas consumed by the electrochemical reaction.
8. A fuel cell stack voltage drop calculation device characterized by comprising: The fuel cell stack pressure drop calculation device comprises: a single-phase test module for obtaining a target stack composed of a preset number of fuel cells, performing a single-phase test of pure gas supply and coolant supply on the target stack, and obtaining a single-phase curve corresponding to single-phase pressure drop and flow rate; a multi-phase test module for performing power generation tests on the target stack under different working conditions, and obtaining a multi-phase curve corresponding to multi-phase pressure drop and flow rate; a single-cell pressure drop calculation module for generating a single-cell flow rate curve of pressure drop and flow rate of a single cell with any number of pieces according to the single-phase curve and the multi-phase curve.
9. A fuel cell stack pressure drop calculation device characterized by comprising: The fuel cell stack pressure drop calculation device comprises a memory, a processor, and a fuel cell stack pressure drop calculation program stored on the memory and executable on the processor, and the fuel cell stack pressure drop calculation program is configured to implement the steps of the fuel cell stack pressure drop calculation method according to any one of claims 1 to 7.
10. A storage medium, characterized by The storage medium stores a fuel cell stack pressure drop calculation program, and the fuel cell stack pressure drop calculation program is executed by the processor to implement the steps of the fuel cell stack pressure drop calculation method according to any one of claims 1 to 7.