A fuel cell stack performance design method, system, electronic device and medium

Abstract

The present application relates to a kind of fuel cell stack performance design method, system, electronic equipment and medium, method includes the following steps: receiving the polarization curve parameter of fuel cell stack by visual interface, the voltage of single cell corresponding to each current density is calculated;Fuel cell stack operating current density is received by visual interface, the voltage of single cell corresponding to the operating current density is obtained;Fuel cell stack operating current / operating voltage, S2 obtained operating current density and the voltage of single cell corresponding to the operating current density are received by visual interface, the number of single cell and activation area are calculated, whether the number of single cell and activation area meet design requirement and design target are verified, after verifying, the specific size parameter of the fuel cell can be quickly determined according to the number of single cell and activation area.Compared with prior art, the present application can efficiently design fuel cell, has strong engineering practical value, and is suitable for all fuel cells.

Description

Technical Field

[0001] The present invention relates to the field of fuel cell technology, and in particular to a fuel cell stack performance design method, system, electronic equipment and medium. Background Art

[0002] Over the past few decades, fossil fuels, primarily coal and oil, have been used extensively as the primary energy source for the industrial sector, leading to numerous negative consequences, including air pollution and energy consumption issues. Therefore, hydrogen energy, as a highly efficient, energy-efficient, low-pollution, and low-emission energy source, has become a growing trend. Hydrogen fuel cells are energy conversion devices that use hydrogen as an energy source.

[0003] Proton exchange membrane fuel cells (PEMFCs) are the most common type of fuel cell, boasting high conversion efficiency. They generate electricity and water through an electrochemical reaction between hydrogen and oxygen in the air, making them an ideal energy source for the future. Due to the limited voltage of a single fuel cell, multiple fuel cell units are typically connected in series to form a fuel cell stack to meet practical power and voltage requirements.

[0004] Currently, the design of fuel cell stacks in fuel cell vehicle engines mainly relies on manual calculations, which is a complex and time-consuming process. Traditional engine engineers are unfamiliar with the emerging technology of fuel cells and need a lot of time to learn on their own, derive fuel cell electrochemical performance formulas, and build mapping relationships between various parameters to ultimately achieve reasonable design parameters and design indicators. Currently, there is still a lack of design methods and internal mechanisms for the electrochemical performance of fuel cell stacks. Most models are designed for the electrochemical performance of a single or local fuel cell, or are calculated offline, which takes a long time and does not meet the practical and fast requirements of engineering, increasing a lot of manpower and time costs. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a fuel cell stack performance design method, system, electronic equipment and medium. This method can efficiently design fuel cell performance indicators and is applicable to all similar fuel cells of different sizes.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] According to a first aspect of the present invention, the present invention provides a fuel cell stack performance design method, comprising the following steps:

[0008] S1: Receive the polarization curve parameters of the fuel cell stack through the visual interface and calculate the single cell voltage corresponding to each current density;

[0009] S2: receiving the operating current density of the fuel cell stack through a visual interface, and obtaining the single cell voltage corresponding to the operating current density;

[0010] S3: Receive the working current / working voltage of the fuel cell stack, the working current density obtained in S2, and the single cell voltage corresponding to the working current density through the visual interface, calculate the number of single cells and the activation area, and verify whether the number of single cells and the activation area meet the design requirements. After verification, determine the size parameters of the fuel cell based on the number of single cells and the activation area.

[0011] Preferably, the polarization curve parameters include hydrogen pressure, air pressure and operating temperature.

[0012] Preferably, in S3, the process of verifying whether the number of cells and the activation area meet the design requirements is specifically as follows:

[0013] The number of cells and activation area calculated by S3 are received through the visual interface, and the fuel cell power value at each current density is calculated in combination with the polarization curve parameters received in S1;

[0014] Combined with the operating current density received in S2, the fuel cell power under the operating current density, the maximum power of the fuel cell, and the current density value corresponding to the maximum power of the fuel cell are obtained;

[0015] Determine whether the fuel cell power corresponding to the working current density meets the design requirements. If so, directly determine the size parameters of the fuel cell based on the number of cells and the activation area. Otherwise, input the design power through the visual interface, calculate the new number of cells and activation area, and then determine the size parameters of the fuel cell based on the new number of cells and activation area.

[0016] Preferably, after calculating the fuel cell power at each current density, a power curve is generated to describe the relationship between each current density and the fuel cell power.

[0017] Preferably, in S1, after calculating the cell voltage corresponding to each current density, a polarization characteristic curve is generated to describe the corresponding relationship between each current density and the cell voltage.

[0018] Preferably, by receiving the working current density and polarization curve parameters, mathematical models of the Nernst voltage, activation loss, ohmic loss and concentration loss and the working current density and polarization curve parameters are established respectively, and the Nernst voltage, activation loss, ohmic loss and concentration loss under the working current density and polarization curve parameters are calculated.

[0019] According to a second aspect of the present invention, the present invention provides a fuel cell stack performance design system, comprising:

[0020] The first visualization interface is used to receive the polarization curve parameters, operating current density, and calculated number of cells and activation area of ​​the fuel cell stack;

[0021] The second visualization interface is used to receive the operating current / operating voltage, operating current density, design power, and the calculated single cell voltage corresponding to the operating current density; and to display the calculation results of the number of single cells and the activation area.

[0022] Processor: used to execute the fuel cell stack performance design method according to any one of claims 1 to 5.

[0023] Preferably, a button for switching to a second visual interface is provided in the first visual interface.

[0024] According to the third aspect provided by the present invention, the present invention provides an electronic device comprising: one or more processors; a memory; and one or more programs stored in the memory, wherein the one or more programs include instructions for executing any of the fuel cell stack performance design methods described above.

[0025] According to the fourth aspect provided by the present invention, the present invention provides a computer-readable storage medium, including one or more programs for execution by one or more processors of an electronic device, and the one or more programs include instructions for executing any of the fuel cell stack performance design methods described above.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention provides a fuel cell stack performance design method, which receives multiple parameters of the fuel cell through a visual interface, gradually calculates the number of single cells and the activation area, and then designs the specific parameters of the fuel cell based on the number of single cells and the activation area. This method is applicable to all fuel cells and can quickly obtain the design parameters of the fuel cell.

[0028] 2. The present invention provides a fuel cell stack performance design method, which obtains the power curve of the battery by inputting the calculated number of single cells and activation area into the visualization interface again. According to the power curve, it can be intuitively judged whether the number of single cells and activation area need to be optimized. The calculation can be iterated repeatedly and efficiently, thereby increasing the accuracy and convenience of fuel cell design.

[0029] 3. The present invention provides a fuel cell stack performance design method. By inputting the design power into a visual interface, the number of single cells and the activation area can be recalculated to obtain the number of single cells and the activation area that meet the power requirements, and then the fuel cell can be macro-designed. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic flow chart of a fuel cell stack performance design method provided in this embodiment.

[0031] Figure 2 A schematic diagram of a first visual interface of a fuel cell stack performance design system provided in this embodiment;

[0032] Figure 3 for Figure 1 A schematic diagram of a polarization characteristic curve in the illustrated embodiment;

[0033] Figure 4 for Figure 1 An interface display diagram of the parameters calculated in the embodiment shown;

[0034] Figure 5 A schematic diagram of a second visual interface of a fuel cell stack performance design system provided in this embodiment;

[0035] Figure 6 for Figure 1 A schematic diagram of a power curve in the illustrated embodiment;

[0036] Figure 7 for Figure 1 An interface diagram showing the current density and the calculated power in the illustrated embodiment; DETAILED DESCRIPTION

[0037] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0038] According to a first aspect of the present invention, the present invention provides a fuel cell stack performance design method, comprising the following steps:

[0039] S1: Receive polarization curve parameters of the fuel cell stack through a visual interface, and calculate each current density and the single cell voltage corresponding to each current density;

[0040] By generating a polarization curve characteristic curve, the corresponding relationship between each current density and the single cell voltage is described.

[0041] As an optional embodiment, at 0.01A / cm 2 As interval, 1.4A / cm 2 For the limiting current density, draw the polarization characteristic curve.

[0042] The purpose of generating the polarization characteristic curve is to predict the performance of the established fuel cell at different current densities based on the actual input; and to select input parameters that better meet the design requirements based on the fuel cell performance under different inputs.

[0043] S2: receiving the operating current density of the fuel cell stack through a visual interface, and calculating the single cell voltage corresponding to the operating current density based on the polarization characteristic curve;

[0044] S3: Receive the working current / working voltage of the fuel cell stack, the working current density obtained in S2, and the single cell voltage corresponding to the working current density through the visual interface, calculate the number of single cells and the activation area, and verify whether the number of single cells and the activation area meet the design requirements. After verification, determine the macroscopic size of the fuel cell based on the number of single cells and the activation area.

[0045] As an optional implementation manner, the polarization curve parameters include hydrogen pressure, air pressure and operating temperature.

[0046] Preferably, in S3, the process of verifying whether the number of cells and the activation area meet the design requirements is specifically as follows:

[0047] The number of cells and the activation area calculated by S3 are received through a visual interface, and combined with the polarization curve parameters received in S1 to generate a power curve, i.e., a curve describing the fuel cell power at various current densities;

[0048] In combination with the operating current density received in S2 , the fuel cell power under the operating current density, the maximum power of the fuel cell, and the current density corresponding to the maximum power of the fuel cell are obtained.

[0049] Determine whether the fuel cell power corresponding to the working current density meets the design requirements. If so, directly determine the macroscopic size of the fuel cell based on the number of cells and the activation area. Otherwise, input the design power through the visual interface, calculate the new number of cells and activation area, and then determine the macroscopic size of the fuel cell based on the new number of cells and activation area.

[0050] Specifically, the number of cells can be used to preliminarily determine the thickness of the fuel cell, and the active area can be used to preliminarily determine the length and width of the fuel cell stack, both of which are essential components of fuel cell sizing. Similarly, the number of cells and active area can be used to further calculate the actual total power of the fuel cell, which can then be used as input parameters for the power curve in the first visualization interface.

[0051] As an optional embodiment, in S2, by receiving the operating current density and polarization curve parameters, the Nernst voltage, activation loss, ohmic loss, and concentration loss can also be calculated. For the fuel cell designed based on the number of cells and activation area, the values ​​of the Nernst voltage, activation loss, ohmic loss, and concentration loss of the fuel cell must also meet the design requirements of the fuel cell stack.

[0052] As an optional embodiment, corresponding parameters are calculated by establishing mathematical models between the various parameters. Specifically, a mathematical model of single-cell voltage based on Nernst voltage, activation polarization voltage loss, ohmic polarization voltage loss, and concentration polarization voltage loss is established, as well as a mathematical model of overall stack performance parameters based on the number of single cells, activation area, single-cell voltage, total stack power, and total stack voltage / current is established to achieve calculation of fuel cell performance.

[0053] As an optional implementation, when the calculated number of battery cells is a decimal, it is rounded to an integer.

[0054] According to a second aspect of the present invention, the present invention provides a fuel cell stack performance design system, comprising:

[0055] The first visualization interface is used to receive the polarization curve parameters, operating current density, and calculated number of cells and activation area of ​​the fuel cell stack;

[0056] The second visualization interface is used to receive the operating current / operating voltage, operating current density, design power, and the calculated single cell voltage corresponding to the operating current density; and to display the calculation results of the number of single cells and the activation area.

[0057] Processor: used to execute the fuel cell stack performance design method as described above.

[0058] As an optional implementation, a button for switching to the second visual interface is provided in the first visual interface.

[0059] Any combination of the above optional implementation modes can result in a more preferred implementation mode. The best implementation mode obtained by combining all the optional implementation modes is described in detail below.

[0060] In this embodiment, the first visualization interface is a battery stack performance design interface, and the second visualization interface is a battery overall performance parameter design interface.

[0061] Taking the design of a 500W low-power fuel cell stack as an example, the performance parameters required for the fuel cell stack include polarization curve parameters, operating current density, and operating voltage / operating current. Among them, the polarization curve parameters include hydrogen pressure: 3atm, air pressure: 1atm, and operating temperature: 60 degrees Celsius. Input the polarization curve parameters into Figure 2 In the polarization curve parameter input module of the stack performance design interface shown in the figure, click the polarization curve & power curve button to generate the following Figure 3 The polarization characteristic curve shown is the corresponding relationship between each current density and the single cell voltage.

[0062] exist Figure 2 Enter the working current density 1.1A / cm in the current density input box of the stack performance design interface shown in the figure. 2 According to the polarization characteristic curve, the single cell voltage corresponding to the working current density is 0.655V. Figure 4 shown.

[0063] Click the battery design interface button in the battery performance design interface to open the battery overall performance parameter design interface. Figure 5 As shown, the working current density is 1.1A / cm 2 And the single cell voltage 0.655V corresponding to the working current density is entered into the corresponding parameter input box; the working voltage 23.8V is entered into the total voltage input box, and the calculation is as follows Figure 4 The power curve parameters are calculated based on the results. The power curve parameters include the number of single cells (36.3359), the activation area (19.0985 cm2), and the activation area (19.0985 cm3). 2 After rounding, the number of cells is 36, and the activation area is not rounded, which is 19.0985 cm 2 .

[0064] The number of cells obtained above is 36 and the activation area is 19.0985 cm 2 , enter the power curve input parameter module in the fuel cell performance design interface, click the polarization curve & power curve button to generate the power curve of the fuel cell, refer to Figure 6 shown.

[0065] At a current density of 1.1 A / cm 2 In the case of , the corresponding power is 495.3745W, and the current density corresponding to the highest power is 1.08A / cm 2 , the corresponding maximum power is 495.9565W, detailed description as follows Figure 7 shown.

[0066] When the maximum power of 495.9565W meets the design requirements, the macroscopic dimensions of the fuel cell are designed according to the values ​​of the number of single cells and the activation area. If the maximum power of 495.9565W does not meet the design requirements, the design power is entered in the design power input box in the battery overall performance parameter design interface, and the background code is called to calculate the values ​​of the number of single cells and the activation area again to obtain new values ​​of the number of single cells and the activation area, and the macroscopic dimensions of the fuel cell are designed according to the new values.

[0067] According to the third aspect of the present invention, the present invention provides an electronic device comprising: one or more processors; a memory; and one or more programs stored in the memory, wherein the one or more programs include instructions for executing any of the fuel cell stack performance design methods described above.

[0068] According to a fourth aspect of the present invention, the present invention provides a computer-readable storage medium comprising one or more programs for execution by one or more processors of an electronic device, wherein the one or more programs comprise instructions for executing any of the fuel cell stack performance design methods described above.

[0069] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the 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 enabling 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 method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0070] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A fuel cell stack performance design method, characterized in that: The steps include: S1: Receive the polarization curve parameters of the fuel cell stack through the visual interface and calculate the single cell voltage corresponding to each current density; S2: receiving the operating current density of the fuel cell stack through a visual interface, and obtaining the single cell voltage corresponding to the operating current density; S3: Receive the operating current / operating voltage of the fuel cell stack, the operating current density obtained in S2, and the single cell voltage corresponding to the operating current density through a visual interface, calculate the number of single cells and the activation area, verify whether the number of single cells and the activation area meet the design requirements, and after verification, determine the size parameters of the fuel cell based on the number of single cells and the activation area; The polarization curve parameters include hydrogen pressure, air pressure and operating temperature; In S3, the process of verifying whether the number of cells and the activation area meet the design requirements is as follows: The number of cells and activation area calculated by S3 are received through the visual interface, and the fuel cell power value at each current density is calculated in combination with the polarization curve parameters received in S1; Combined with the operating current density received in S2, the fuel cell power under the operating current density, the maximum power of the fuel cell, and the current density value corresponding to the maximum power of the fuel cell are obtained; Determine whether the fuel cell power corresponding to the working current density meets the design requirements. If so, directly determine the size parameters of the fuel cell based on the number of cells and the activation area. Otherwise, input the design power through the visual interface, calculate the new number of cells and activation area, and then determine the size parameters of the fuel cell based on the new number of cells and activation area.

2. A fuel cell stack performance design method according to claim 1, characterized in that: After calculating the fuel cell power at each current density, a power curve is generated to describe the relationship between each current density and the fuel cell power.

3. A fuel cell stack performance design method according to claim 1, characterized in that: In S1 , after calculating the cell voltage corresponding to each current density, a polarization characteristic curve is generated to describe the corresponding relationship between each current density and the cell voltage.

4. A fuel cell stack performance design method according to claim 1, characterized in that: By receiving the working current density and polarization curve parameters, mathematical models of the Nernst voltage, activation loss, ohmic loss and concentration loss with the working current density and polarization curve parameters are established respectively, and the Nernst voltage, activation loss, ohmic loss and concentration loss under the working current density and polarization curve parameters are calculated.

5. A fuel cell stack performance design system, characterized in that: include: The first visualization interface is used to receive the polarization curve parameters, operating current density, and calculated number of cells and activation area of ​​the fuel cell stack; Second visual interface: used to receive the operating current / operating voltage, operating current density, design power, and the calculated single cell voltage corresponding to the operating current density; and display the calculation results of the number of single cells and the activated area; Processor: used to execute the fuel cell stack performance design method according to any one of claims 1 to 3.

6. A fuel cell stack performance design system according to claim 5, characterized in that: The first visual interface is provided with a button for switching to the second visual interface.

7. An electronic device, characterized in that: include: one or more processors; Memory; and one or more programs stored in a memory, wherein the one or more programs include instructions for executing the fuel cell stack performance design method according to any one of claims 1-3.

8. A computer-readable storage medium, characterized in that The method comprises one or more programs for execution by one or more processors of an electronic device, wherein the one or more programs include instructions for executing the fuel cell stack performance design method according to any one of claims 1 to 3.

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