Membrane electrode hot-pressing process optimization and Nafion dosage regulation and control system and method

Abstract

The invention discloses a membrane electrode hot-pressing process optimization and Nafion dosage regulation and control system and method, and relates to the technical field of hydrogen fuel cell core component preparation. The method comprises the following steps: firstly, through a process parameter optimization algorithm and a Nafion dosage calculation model, outputting an optimal hot-pressing parameter and Nafion dosage scheme based on catalyst characteristics, and establishing association mapping; then relevant hardware assemblies are integrated to achieve hot pressing, regional coating and hot pressing-packaging synchronous forming, and finally membrane electrode data are collected through three types of monitoring assemblies and fed back to an intelligent software regulation and control module to trigger parameter self-adaptive adjustment. According to the scheme, the defects of poor interface contact, low mass transfer efficiency, frequent flooding and short service life in a traditional process are overcome, precise adaptation with a high-activity ultra-low platinum loading catalyst is realized, the proton conduction efficiency and the gas diffusivity of a membrane electrode are improved, the service life of the membrane electrode is prolonged, and the comprehensive cost of a fuel cell stack is reduced.

Description

Technical Field

[0001] This invention relates to the field of hydrogen fuel cell core component preparation technology, specifically to the optimization of membrane electrode hot pressing process and Nafion dosage control system and method. Background Technology

[0002] The membrane electrode assembly (MEA) is the core of a hydrogen fuel cell, and its performance directly determines the stack efficiency, lifespan, and cost. Existing processes have significant drawbacks: fixed thermo-pressure parameters, lack of a precise control model for Nafion dosage, inability to adapt to the stack's "water-gas-electricity-heat" coordinated management requirements, and a lack of real-time feedback and adaptive adjustment capabilities. Therefore, targeted optimization solutions are urgently needed.

[0003] Existing technology, such as the invention patent application with publication number CN120033256B, discloses a method and system for preparing a hydrogen fuel cell based on multi-stage feedback control. The method includes: uniformly coating a catalyst slurry onto the surface of a proton exchange membrane using an electromagnetic field-assisted coating process to form cathode and anode catalyst layers; real-time monitoring of the interfacial contact resistance distribution of the membrane electrode assembly during hot pressing, and dynamically adjusting short-term coating parameters of the electromagnetic field-assisted coating process based on the resistance data; online acquisition of electrochemical impedance spectroscopy data during the electrochemical activation stage, and back-optimization of long-term process baseline values ​​for the catalyst slurry in the electromagnetic field-assisted coating process and the hot pressing process using a transfer learning algorithm; the system used to implement the above method includes: an electromagnetic field-assisted coating module, a hot pressing-resistance monitoring module, and an electrochemical activation-transfer learning optimization module. This invention effectively solves the problems of uneven catalyst coating and solidification of process parameters during membrane electrode preparation through a multi-stage feedback control mechanism.

[0004] As can be seen from the above solutions, the traditional hot pressing process has problems such as fixed parameters that cannot be adapted to the nanoscale structural characteristics of highly active ultra-low platinum loading catalysts, lack of precise models for Nafion dosage control, and disconnect between hot pressing and encapsulation processes. These problems lead to poor contact at the three reaction interfaces, high mass transfer resistance, discontinuous proton conduction, easy occurrence of water flooding, poor interface sealing, and limited service life. Furthermore, the existing process cannot be adapted to the coordinated management of the "water-gas-electricity-heat" of the fuel cell stack and lacks real-time feedback and adaptive adjustment capabilities. Summary of the Invention

[0005] To address the aforementioned technical shortcomings, the present invention aims to provide a system and method for optimizing the hot pressing process of membrane electrodes and controlling the amount of Nafion used.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: In the first aspect, the present invention provides a membrane electrode hot pressing process optimization and Nafion dosage control system, including the following modules: Intelligent software control module: used to dynamically output the optimal hot pressing parameters and Nafion dosage scheme based on catalyst crystal structure data and active site density characteristic data through process parameter optimization algorithm and Nafion dosage calculation model, and establish the correlation mapping between material properties, process parameters and performance output.

[0007] High-precision hardware execution module: This module integrates high-precision hot pressing control components, Nafion metering and coating components, and integrated packaging components. Based on the optimal hot pressing parameters and Nafion dosage scheme output by the intelligent software control module, it enables the execution of gradient heating and segmented pressure holding hot pressing processes, precise regional coating of Nafion, and simultaneous hot pressing and packaging.

[0008] Real-time monitoring and feedback module: This module integrates interface impedance monitoring components, mass transfer efficiency detection components, and flooding status sensing components. It collects real-time data on membrane electrode interface contact status, proton conduction efficiency, and flooding risk, and feeds this data back to the intelligent software control module to trigger adaptive parameter adjustment.

[0009] In a second aspect, the present invention provides a method for optimizing the hot pressing process of membrane electrode and controlling the amount of Nafion, comprising the following steps: S1, by using a process parameter optimization algorithm and a Nafion amount calculation model, based on catalyst crystal structure data and active site density characteristic data, dynamically outputting the optimal hot pressing parameters and Nafion amount scheme, and establishing a correlation mapping between material properties, process parameters and performance output.

[0010] S2 integrates a high-precision hot-pressing control component, a Nafion metering and coating component, and an integrated packaging component. According to the optimal hot-pressing parameters and Nafion dosage scheme output by the intelligent software control module, it realizes the execution of the hot-pressing process with gradient heating and segmented pressure holding, precise coating of Nafion in different areas, and simultaneous hot-pressing and packaging.

[0011] S3 integrates an interface impedance monitoring component, a mass transfer efficiency detection component, and a flooding status sensing component. It collects real-time data on the membrane electrode interface contact status, proton conduction efficiency, and flooding risk, and feeds this data back to the intelligent software control module to trigger adaptive parameter adjustment.

[0012] The beneficial effects of this invention are as follows: 1. This invention provides a system and method for optimizing the membrane electrode hot-pressing process and controlling the Nafion dosage. First, through a process parameter optimization algorithm and a Nafion dosage calculation model, the optimal hot-pressing parameters and Nafion dosage scheme are output based on catalyst characteristics, and a correlation mapping is established. Then, relevant hardware components are integrated to achieve simultaneous hot-pressing, regional coating, and hot-pressing-encapsulation molding. Finally, membrane electrode data is collected through three types of monitoring components and fed back to the intelligent software control module to trigger adaptive parameter adjustment. This solution solves the shortcomings of traditional processes, such as poor interface contact, low mass transfer efficiency, frequent flooding, and short lifespan. It achieves precise adaptation with highly active ultra-low platinum loading catalysts, improves the proton conduction efficiency, gas diffusion capacity, and lifespan of the membrane electrode, and reduces the overall cost of fuel cell stacks.

[0013] 2. This invention, through the synergistic optimization of hot pressing process and Nafion dosage, reduces the interfacial impedance of the three reactions of the membrane electrode by ≥40%, increases the proton conduction efficiency by ≥35%, and reduces the gas diffusion resistance by ≥30%, effectively solving the problem of poor interfacial contact in traditional processes.

[0014] 3. The Nafion dosage calculation model and regional coating method based on catalyst characteristics balance the requirements of proton conduction and gas diffusion, reducing the flooding rate by ≥50%.

[0015] 4. The integrated packaging and real-time monitoring feedback design significantly extend the service life of the membrane electrode and adapt to the performance advantages of highly active ultra-low platinum loading catalysts, helping to maintain a high level of hydrogen utilization in the fuel cell stack.

[0016] 5. Process parameters can be dynamically adjusted through software models to adapt to ultra-low platinum loading catalysts of different specifications, demonstrating good versatility and potential for large-scale production. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the system structure connection of the present invention.

[0019] Figure 2 This is a schematic diagram of the implementation steps of the method of the present invention. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] See Figure 1 As shown, the membrane electrode hot pressing process optimization and Nafion dosage control system includes the following modules: Intelligent software control module: It is used to dynamically output the optimal hot pressing parameters and Nafion dosage scheme based on catalyst crystal structure data and active site density characteristic data through process parameter optimization algorithm and Nafion dosage calculation model, and establish the correlation mapping between material properties, process parameters and performance output.

[0022] In one specific embodiment, the intelligent software control module performs the following process: collecting catalyst crystal structure data and related characteristic data of active site density; based on the related characteristic data, performing calculations using process parameter optimization algorithms to generate suitable hot pressing parameters; and simultaneously, combining the related characteristic data, outputting regional Nafion dosage schemes through a Nafion dosage calculation model.

[0023] By establishing a correlation mapping between material properties, generated hot-pressing parameters and Nafion dosage scheme and membrane electrode performance output, the hot-pressing parameters and Nafion dosage scheme are simultaneously output to a high-precision hardware execution module.

[0024] It should be noted that characteristic data refers to the core quantitative data of the catalyst after collection and preprocessing, including the collected characteristic data of catalyst crystal surface structure and active site density.

[0025] Catalyst crystal structure data collection: Crystal orientation and diffraction data of high-quality single-crystal catalysts were collected using single-crystal X-ray diffraction technology.

[0026] Collect relevant characteristic data on the density of active sites: obtain information such as the electronic structure and geometry of active sites through X-ray photoelectron spectroscopy and cyclic voltammetry.

[0027] Process parameter optimization algorithm: Input parameters: catalyst crystal structure data, active site density characteristics data, membrane electrode interlayer fusion target and material tolerance constraint index.

[0028] Preset calculation logic: Characteristic-demand correlation mapping: Crystal plane compatibility score ≥8 points corresponds to a reaction temperature range widening of ±5℃, high active site density corresponds to a holding time correction coefficient of 1.2; Staged parameter derivation: Heating rate = (120℃-25℃) × crystal plane compatibility correction coefficient / 90s, holding pressure = 3MPa × 0.7 × lattice constant correction coefficient; Verification correction: Interface contact area ratio <85% corresponds to a 5% increase in holding pressure.

[0029] Output parameter set: A complete hot-press parameter set including stage timing, temperature control logic, and pressure maintenance rules.

[0030] Adapted hot-pressing parameters: These are hot-pressing process parameters that are precisely matched to the characteristics of the current catalyst, generated by process parameter optimization algorithms, rather than fixed parameters. They include stage timing, temperature control logic, and pressure maintenance rules.

[0031] Nafion dosage calculation model: Input parameters include catalyst crystal plane compatibility score, active site density, catalyst layer partitioning parameters, medium active region and edge region; Requirements constraints: continuous proton conduction, no shielding of active sites, and suppression of flooding; Calculation logic: First, based on the basic weight of high-activity region: medium-activity region: edge region = 6:3:1, combined with the crystal plane compatibility score correction, the usage ratio of each region is derived; then, the usage of each region is calculated by using the usage = ratio × total usage baseline value, and at the same time, it is verified whether the above constraints are met. Adaptation and Output: Integrates process conditions such as coating rate and uniformity deviation ±5%, and outputs regional Nafion dosage schemes including upper and lower limits, optimal values, and coating operation parameters for each zone.

[0032] Regional Nafion Dosage Plan: A precise control plan output by the Nafion dosage calculation model.

[0033] Association mapping: refers to the three-dimensional correspondence between material properties, process parameters, and membrane electrode performance output. It is constructed by pre-set mapping rules to obtain which hot pressing parameters and Nafion dosage scheme correspond to specific catalyst properties.

[0034] Preferably, the specific process of generating suitable hot-pressing parameters is as follows: extract catalyst crystal surface structure data and active site density characteristic data, combine process parameter optimization algorithms and fusion requirements of catalyst layer, proton exchange membrane and gas diffusion layer, establish the correspondence between characteristic data and core parameters of each stage of hot pressing through preset calculation logic; and then analyze the influence of hot-pressing parameters on interface fusion index under different characteristic data.

[0035] Based on the analysis results, the hot pressing process is divided into heating, holding and cooling stages. The core control parameters of each stage are determined, forming a complete hot pressing parameter set that includes stage timing, temperature control logic and pressure maintenance rules. The correspondence between hot pressing parameters and catalyst characteristics and interface fusion requirements is determined, and suitable hot pressing parameters are generated.

[0036] It should be noted that the core parameters of each stage of hot pressing refer to the key control parameters of each of the three stages of hot pressing: heating, holding, and cooling. For example, the heating rate and target temperature range that control the temperature of the hot pressing environment during the heating stage; the holding pressure value and holding time that maintain interlayer fusion during the holding stage; and the cooling rate and cooling endpoint temperature that ensure structural stability during the cooling stage. These are quantitative parameters that can be precisely controlled by the equipment.

[0037] Stage Sequence: The time allocation rules for each stage of hot pressing, such as 30% for the heating stage, 50% for the pressure holding stage, and 20% for the cooling stage, need to be designed in conjunction with the thermal stability of the catalyst and the fusion requirements to ensure that the effects of each stage are fully achieved.

[0038] Temperature control logic: The control rules for temperature changes during hot pressing are specifically based on the material's tolerance and interlayer fusion requirements, and set the heating rate, preset reaction temperature range, temperature stability standard during the holding stage, and quantitative control rules for the cooling rate and cooling endpoint temperature in stages.

[0039] Pressure maintenance rules: Pressure control standards during the pressure holding phase, namely, setting a pressure holding pressure value that is suitable for interlayer fusion and material tolerance, and limiting pressure fluctuation deviations to maintain pressure stability.

[0040] Preferably, the specific process of the output regional Nafion dosage scheme is as follows: extract catalyst crystal surface structure data and active site density characteristic data, combine the preset regional division rules of the catalyst layer to complete the partitioning and obtain the parameters of each region, input the parameters of each region into the Nafion dosage calculation model, and analyze the differences in reaction requirements of different regions.

[0041] Based on the analysis results, the Nafion usage allocation ratio for each region is determined by preset calculation logic, thus obtaining the usage correspondence between the reactive region and the edge region.

[0042] By integrating the dosage parameters of each region with the coating process adaptation conditions, a complete regional Nafion dosage scheme is formed and output to the Nafion metering coating component of the high-precision hardware execution module.

[0043] It should be noted that the preset region division rules for the catalyst layer are as follows: The preset standardization rules for catalyst layer partitioning are specifically based on the quantitative thresholds of four dimensions: active site density gradient, gas diffusion path characteristics, interface contact state, and crystal plane structure adaptability.

[0044] Active reaction region: The region in the catalyst layer with a high density of active sites and intense electrochemical reactions.

[0045] Edge region: The region in the catalyst layer with a low density of active sites, a long gas diffusion path, or a weak interfacial contact.

[0046] Preferably, the specific process of establishing the correlation mapping between material properties, generated hot-pressing parameters and Nafion dosage scheme and membrane electrode performance output is as follows: extract catalyst crystal surface structure data and active site density material property data, take catalyst crystal surface structure data and active site density material property data as input dimensions, take generated hot-pressing parameters and Nafion dosage scheme as process dimensions, and take performance-related data of membrane electrode interface contact state, proton conduction efficiency and flooding risk as output dimensions.

[0047] By pre-setting mapping rules, a three-dimensional correlation model is constructed to obtain the correspondence between material properties and process parameters, as well as the correspondence between process parameters and performance output.

[0048] Data from each dimension is stored in a structured manner according to a preset format to form a callable association mapping library.

[0049] It should be noted that the membrane electrode interface contact state is a core performance quantitative indicator for evaluating the interlayer fusion effect of the membrane electrode, referring to data such as the contact area ratio and adhesion tightness score of the catalytic layer, proton exchange membrane and gas diffusion layer.

[0050] Proton conduction efficiency: A quantitative performance indicator reflecting the proton transport capability of a membrane electrode.

[0051] Performance-related data on flooding risk: Quantitative data for assessing the risk of water accumulation inside the membrane electrode.

[0052] Preset format: The system predefines the data structure storage standard, which specifically defines the unified storage format requirements for data field types, arrangement logic, encoding rules and verification specifications.

[0053] High-precision hardware execution module: This module integrates high-precision hot pressing control components, Nafion metering and coating components, and integrated packaging components. Based on the optimal hot pressing parameters and Nafion dosage scheme output by the intelligent software control module, it enables the execution of gradient heating and segmented pressure holding hot pressing processes, precise regional coating of Nafion, and simultaneous hot pressing and packaging.

[0054] In one specific embodiment, the high-precision hardware execution module performs the following process: it starts the hot-pressing program through the integrated high-precision hot-pressing control component, executes gradient heating and segmented pressure holding operations according to preset logic, and completes the interface bonding of the catalyst layer, proton exchange membrane and gas diffusion layer.

[0055] Simultaneously, the Nafion metering coating component receives the regional dosage scheme output by the intelligent software control module, first identifying the reactive and edge regions of the catalyst layer.

[0056] Based on the identification results, and according to the preset regional dosage allocation logic, corresponding doses of Nafion coating are applied to the reactive areas and the edge areas respectively.

[0057] When the hot pressing process reaches the pressure holding stage, the integrated packaging component is activated, and the membrane electrode is simultaneously encapsulated and formed, realizing the coordinated linkage between the hot pressing and packaging processes.

[0058] It should be noted that the preset logic refers to the standardized control rules of the hot pressing process, specifically the rate gradient of the gradient heating, the matching of the pressure or duration of the segmented pressure holding, and the coordinated control logic of temperature and pressure.

[0059] Gradient heating: The core operation method in the hot pressing heating stage, which refers to gradually increasing the temperature of the hot pressing environment according to a preset rate gradient.

[0060] Segmented pressure holding: The core operation method of the hot pressing and pressure holding stage refers to maintaining a stable state at a fixed pressure value and a preset time within a preset reaction temperature range.

[0061] The preset regional dosage allocation logic is as follows: the standardized execution rules for regional coating are based on catalyst characteristics and catalyst layer partitioning parameters, combined with the requirements of continuous proton conduction, non-shielding of active sites and suppression of water flooding, to obtain the coating execution rules of dosage ratio, upper and lower limits and priority ranking of each region.

[0062] Preferably, the specific process of performing gradient heating and segmented pressure holding operations according to preset logic is as follows: extract the hot-pressing parameters output by the intelligent software control module, start the heating program first, and gradually increase the hot-pressing environment temperature according to the staged temperature increase logic until the preset reaction temperature range is reached.

[0063] After the temperature stabilizes, the pressure holding stage begins, maintaining the current pressure and temperature for a preset duration to ensure the catalytic layer, proton exchange membrane, and gas diffusion layer fully fuse together.

[0064] After the pressure holding stage is completed, the temperature is gradually reduced according to the preset cooling logic until the hot pressing process is completed.

[0065] It should be noted that the phased temperature increase logic is the core control rule of the heating phase, which refers to increasing the temperature in stages according to a preset rate gradient.

[0066] Preset reaction temperature range: The optimal temperature range determined by the intelligent software control module based on the compatibility of catalyst crystal faces and the thermal stability of active sites.

[0067] Preset duration: The duration of the pressure holding phase is determined by the intelligent software control module in combination with the catalyst active site density and the three-layer membrane fusion requirements.

[0068] Preset cooling logic: The core control rules of the cooling stage are to adapt to the requirements of material thermal stress release and interlayer structural stability, and gradually reduce the temperature of the hot pressing environment according to the preset rate gradient to obtain the control rules of the cooling endpoint temperature and the insulation requirements of key nodes.

[0069] Real-time monitoring and feedback module: This module integrates interface impedance monitoring components, mass transfer efficiency detection components, and flooding status sensing components. It collects real-time data on membrane electrode interface contact status, proton conduction efficiency, and flooding risk, and feeds this data back to the intelligent software control module to trigger adaptive parameter adjustment.

[0070] In one specific embodiment, the real-time monitoring feedback module performs the following process: simultaneously collecting membrane electrode interface contact state, proton conduction efficiency, and flooding risk feedback data through an integrated interface impedance monitoring component, mass transfer efficiency detection component, and flooding state sensing component.

[0071] After real-time processing of the collected data, it is fed back to the intelligent software control module according to the preset transmission logic. The intelligent software control module then triggers adaptive adjustment of hot-pressing parameters or Nafion dosage based on the feedback data.

[0072] It should be noted that the preset transmission logic refers to the set of standardized rules for transmission from the real-time monitoring feedback module to the intelligent software control module. Specifically, it is a unified transmission rule that specifies the transmission sequence, data encapsulation format, integrity verification mechanism, and transmission delay threshold.

[0073] Preferably, the specific process of triggering the adaptive adjustment operation of hot-pressing parameters or Nafion dosage based on feedback data is as follows: extract the membrane electrode interface contact state, proton conduction efficiency, and flooding risk feedback data transmitted by the real-time monitoring feedback module, compare the feedback data with preset performance standard thresholds, and determine that the hot-pressing parameter adaptability is insufficient when the membrane electrode interface contact state is less than the preset interface contact threshold and the proton conduction efficiency and flooding risk data are within the normal range; determine that the Nafion dosage allocation is deviated when the proton conduction efficiency is less than the preset proton conduction efficiency threshold, the flooding risk feedback data is greater than the preset flooding risk feedback threshold, and the membrane electrode interface contact state is normal.

[0074] The system calls upon the established mapping library of material properties, process parameters, dosage schemes, and performance outputs, and combines it with the inherent characteristics of the catalyst to generate targeted adjustment parameters through process parameter optimization algorithms or Nafion dosage calculation models.

[0075] The adjusted hot-pressing parameters or Nafion dosage scheme are output to the high-precision hardware execution module in real time to update the process execution instructions, complete the adaptive adjustment, and ensure that the membrane electrode performance is maintained within the preset range.

[0076] It should be noted that the preset performance standard thresholds are the performance standards for judgment set in advance by the system, including the preset interface contact threshold, the preset proton conduction efficiency threshold, and the preset flooding risk feedback threshold.

[0077] The preset interface contact threshold is a critical value used to determine whether the interface contact is qualified. It is set by professionals according to the control requirements, and no specific numerical limit is set here.

[0078] The preset proton conduction efficiency threshold is a critical value used to determine whether the proton conduction efficiency is up to standard. It is set by professionals according to the control requirements, and no specific numerical limit is imposed here.

[0079] The preset flood risk feedback threshold is a critical value used to determine whether the flood risk feedback is qualified. It is set by professionals according to the control needs, and no specific numerical limit is set here.

[0080] Preset range: refers to the control target that ensures core performance indicators such as interface impedance and mass transfer efficiency remain stable within the preset quantitative threshold range by dynamically adjusting hot pressing process parameters and matching the precise dosage of Nafion in different regions.

[0081] The database stores catalyst crystal structure data, active site density and material property data, hot pressing parameters, parameters of each region, membrane electrode interface contact state, proton conduction efficiency and flooding risk feedback data. It also stores preset interface contact thresholds, preset proton conduction efficiency thresholds and preset flooding risk feedback thresholds.

[0082] See Figure 2 As shown, the method for optimizing the hot pressing process of membrane electrode and controlling the amount of Nafion includes the following steps: S1. Based on the catalyst crystal structure data and active site density characteristics data, the optimal hot pressing parameters and Nafion dosage scheme are dynamically output through the process parameter optimization algorithm and Nafion dosage calculation model, and the correlation mapping between material properties, process parameters and performance output is established.

[0083] S2 integrates a high-precision hot-pressing control component, a Nafion metering and coating component, and an integrated packaging component. According to the optimal hot-pressing parameters and Nafion dosage scheme output by the intelligent software control module, it realizes the execution of the hot-pressing process with gradient heating and segmented pressure holding, precise coating of Nafion in different areas, and simultaneous hot-pressing and packaging.

[0084] S3 integrates an interface impedance monitoring component, a mass transfer efficiency detection component, and a flooding status sensing component. It collects real-time data on the membrane electrode interface contact status, proton conduction efficiency, and flooding risk, and feeds this data back to the intelligent software control module to trigger adaptive parameter adjustment.

[0085] The examples described in this invention are not limited to the specific embodiments listed above. The examples are merely illustrative to facilitate understanding of the invention and do not constitute a limitation on the scope of protection of this invention. Any modifications, equivalent substitutions, etc., made within the spirit and principles of this invention should be included within the scope of protection.

[0086] The above description is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined in this specification, they should all fall within the protection scope of the present invention.

Claims

1. A system and method for membrane electrode hot-press process optimization and Nafion dosage control, characterized in that, Comprise the following modules: Intelligent software control module: for through the process parameter optimization algorithm and Nafion dosage calculation model, based on catalyst crystal surface structure data and active site density characteristic data, dynamic output optimal hot pressing parameter and Nafion dosage scheme, establish the correlation mapping of material characteristics, process parameters and performance output; High-precision hardware execution module: for integrating high-precision hot pressing control components and Nafion metering coating components and integrated packaging components, according to the optimal hot pressing parameter and Nafion dosage scheme output by the intelligent software control module, realize the hot pressing process execution of gradient heating and segmented pressure holding, regional precise Nafion coating and hot pressing-packaging simultaneous forming; Real-time monitoring feedback module: for integrating interface impedance monitoring components, mass transfer efficiency detection components and water flooding state sensing components, real-time acquisition of membrane electrode interface contact state, proton conduction efficiency and water flooding risk data, feedback to the intelligent software control module to trigger parameter adaptive adjustment.

2. The MEHPO system and method of claim 1, wherein, The specific process of the intelligent software control module is: Collect catalyst crystal surface structure data and active site density related characteristic data;Based on the related characteristic data, the process parameter optimization algorithm is used for operation, and the adaptive hot pressing parameter is generated;At the same time, combined with the related characteristic data, the Nafion dosage calculation model is used to output the regional Nafion dosage scheme; Through the correlation mapping of material characteristics, generated hot pressing parameters and Nafion dosage scheme and membrane electrode performance output, the hot pressing parameters and Nafion dosage scheme are output to the high-precision hardware execution module at the same time.

3. The MEHPO system and method of claim 2, wherein, The specific process of generating adaptive hot pressing parameters is: Extract catalyst crystal surface structure data and active site density characteristic data, combine process parameter optimization algorithm and catalyst layer, proton exchange membrane and gas diffusion layer fusion requirements, establish the correspondence between characteristic data and hot pressing core parameters in each stage through preset operation logic, and then analyze the influence of hot pressing parameters on interface fusion index under different characteristic data; Based on the analysis results, the hot pressing process is divided into heating, pressure holding and cooling stages, and the core control parameters of each stage are determined respectively to form a complete set of hot pressing parameters containing stage timing, temperature control logic and pressure maintenance rules, determine the correspondence between hot pressing parameters and catalyst characteristics and interface fusion requirements, and generate adaptive hot pressing parameters.

4. The MEHPO system and method of claim 2, wherein, The specific process of outputting regional Nafion dosage scheme is: Extract catalyst crystal surface structure data and active site density characteristic data, combine catalyst layer preset regional division rules to complete partition and get regional parameters, input regional parameters into Nafion dosage calculation model, analyze the reaction demand difference of different regions; Based on the analysis results, the Nafion dosage allocation ratio of each region is determined through the preset operation logic to obtain the dosage correspondence relationship between the reaction active region and the edge region; Integrate each regional dosage parameter and coating process adaptation condition to form a complete regional Nafion dosage scheme, and output to the Nafion metering coating component of the high-precision hardware execution module.

5. The MEHPTO and Nafion dosage control system and method of claim 2, wherein, The specific process of the correlation mapping of the material properties, the generated hot-pressing parameters and the Nafion dosage scheme and the performance output of the membrane electrode is as follows: Extract the catalyst crystal structure data and the active site density material property data, take the catalyst crystal structure data and the active site density material property data as the input dimensions, take the generated hot-pressing parameters and the Nafion dosage scheme as the process dimensions, and take the performance-related data of the membrane electrode interface contact state, the proton conduction efficiency and the water flooding risk as the output dimensions; Through a preset mapping rule, a three-dimensional correlation model is constructed to obtain the corresponding relationship between the material properties and the process parameters and the corresponding logic of the process parameters and the performance output; The dimensional data is structured and stored in a preset format to form a callable correlation mapping library.

6. The MEHPTO and Nafion dosage control system and method of claim 1, wherein, The specific process of the high-precision hardware execution module is as follows: Start the hot-pressing program through the integrated high-precision hot-pressing control component, perform gradient temperature rising and segmented pressure maintaining operation according to the preset logic, and complete the interface bonding of the catalyst layer, the proton exchange membrane and the gas diffusion layer; At the same time, the Nafion metering coating component receives the sub-regional dosage scheme output by the intelligent software control module, first identifies the reaction active region and the edge region of the catalyst layer; Based on the identification result, the reaction active region and the edge region are respectively implemented with corresponding doses of Nafion coating according to the preset regional dosage distribution logic; When the hot-pressing process is executed to the pressure maintaining stage, the integrated packaging component is started, and the packaging and forming of the membrane electrode are completed, realizing the coordinated linkage of the hot-pressing and packaging processes.

7. The MEHPTO and Nafion dosage control system and method of claim 6, wherein, The specific process of performing gradient temperature rising and segmented pressure maintaining operation according to the preset logic is as follows: Extract the hot-pressing parameters output by the intelligent software control module, first start the temperature rising program, gradually increase the hot-pressing environment temperature according to the phased temperature increasing logic, and reach the preset reaction temperature interval; After the temperature is stable, enter the pressure maintaining stage, maintain the current pressure and temperature state for a preset time length, so that the catalyst layer, the proton exchange membrane and the gas diffusion layer are fully fused; After the pressure maintaining stage is completed, gradually reduce the temperature according to the preset temperature decreasing logic until the hot-pressing process is completed.

8. The MEHPTO and Nafion usage control system and method of claim 1, wherein, The specific process of the real-time monitoring feedback module is as follows: Through the integrated interface impedance monitoring component, the mass transfer efficiency detection component and the water flooding state sensing component, the membrane electrode interface contact state, the proton conduction efficiency and the water flooding risk feedback data are collected at the same time; After the collected data of various types are real-time arranged, they are fed back to the intelligent software control module according to the preset transmission logic, and the intelligent software control module triggers the adaptive adjustment operation of the hot-pressing parameters or the Nafion dosage based on the feedback data.

9. The MEHPO system and method of claim 8, wherein, The specific process of triggering the adaptive adjustment operation of the hot-pressing parameters or the Nafion dosage based on the feedback data is as follows: Extract the membrane electrode interface contact state, the proton conduction efficiency and the water flooding risk feedback data transmitted by the real-time monitoring feedback module, compare the feedback data with the preset performance standard threshold value, and when the membrane electrode interface contact state is less than the preset interface contact threshold value and the proton conduction efficiency and the water flooding risk data are in the normal interval, it is determined that the hot-pressing parameter adaptability is insufficient; When the proton conduction efficiency is less than the preset proton conduction efficiency threshold, the water flooding risk feedback data is greater than the preset water flooding risk feedback threshold, and the membrane electrode interface contact state is normal, it is determined that the Nafion dosage distribution deviation exists. The established correlation mapping library of material properties, process parameters, dosage scheme and performance output is called, combined with the inherent characteristics of the catalyst, and through process parameter optimization algorithm or Nafion dosage calculation model operation, targeted adjustment parameters are generated; The adjusted hot-pressing parameters or Nafion dosage scheme are output to the high-precision hardware execution module in real time, the process execution instructions are updated, the adaptive adjustment is completed, and the membrane electrode performance is maintained within the preset range.

10. A method for performing the membrane electrode hot-pressing process optimization and Nafion dosage regulation system according to any one of claims 1-9, characterized in that, It comprises the following steps: S1, through the process parameter optimization algorithm and the Nafion dosage calculation model, based on the catalyst crystal face structure data and the active site density characteristic data, the optimal hot-pressing parameters and the Nafion dosage scheme are dynamically output, and the correlation mapping of material properties, process parameters and performance output is established; S2, integrate high-precision hot-pressing control components and Nafion metering coating components and integrated packaging components, according to the optimal hot-pressing parameters and the Nafion dosage scheme output by the intelligent software regulation module, realize the hot-pressing process execution of gradient heating and segmented pressure maintaining, the precise coating of Nafion in different regions and the hot-pressing-packaging simultaneous forming; S3, integrate interface impedance monitoring components, mass transfer efficiency detection components and water flooding state sensing components, real-time collect membrane electrode interface contact state, proton conduction efficiency and water flooding risk data, feedback to the intelligent software regulation module to trigger parameter adaptive adjustment.

Images