Method and system for judging pollution of membrane electrode of fuel cell and electronic device

Abstract

The invention discloses a method and a system for judging membrane electrode pollution of a fuel cell and an electronic device. The method for judging the pollution of the membrane electrode of the fuel cell comprises the following steps: S1, when the operation of the fuel cell meets a preset condition, acquiring the monolithic voltage of the fuel cell; and S2, judging whether the membrane electrode is polluted or not based on the obtained monolithic voltage of the fuel cell, wherein the preset condition comprises that after the fuel cell continuously operates for not less than a first duration threshold when the single-chip voltage is not greater than the first voltage threshold, the idle current is reached when the single-chip voltage is not greater than a second duration threshold. According to the method and system for judging the pollution of the membrane electrode of the fuel cell and the electronic device provided by the invention, the influence of a Pt oxide layer and other polarization on the performance of the fuel cell is eliminated, and the strong correlation between the measured fuel performance and the pollution degree of the membrane electrode is ensured, so that the pollution judgment accuracy is improved, and an accurate diagnosis basis is provided for a pollution reversible recovery strategy.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular, to a method, a system, and an electronic device for judging the pollution of a fuel cell membrane electrode. Background Art

[0002] Fuel cell technology is a new energy technology that converts hydrogen chemical energy into electrical energy and has important application prospects. The stack is the core component of the fuel cell system and is the place where hydrogen reacts with oxygen to release electrical energy and generate by-product water. The stack is composed of a plurality of cell units stacked together, and each cell unit includes a membrane electrode composed of a proton exchange membrane and catalyst layers and gas diffusion layers located on both sides of the membrane. Due to the complex environment in which the fuel cell system operates, the pollution of the membrane electrode is inevitable, especially when the fuel cell system often operates in a heavily polluted air environment. The pollution of the membrane electrode directly affects the power generation efficiency and service life of the fuel cell system. Therefore, it is very necessary to judge the pollution situation of the membrane electrode in a timely and accurate manner.

[0003] During the operation of the fuel cell system, the pollution situation of the fuel cell membrane electrode can be judged by monitoring the performance parameters of the fuel cell. For example, the Chinese patent application with the publication number CN116799261A discloses a method for judging the pollution of the stack membrane electrode, which mainly judges whether there is pollution through the voltage difference. However, the factors affecting the voltage difference of the fuel cell are diverse. Especially, the superimposed effect of the formation of the Pt oxide layer under high potential conditions on the activation polarization makes the misjudgment rate of the pollution judgment in the prior art as high as 58%. And the prior art cannot distinguish whether the decrease in the performance of the fuel cell is caused by pollution or by the superimposed effect of the formation of the Pt oxide layer on the activation polarization.

[0004] Based on this, it is necessary to propose a technical solution to overcome the deficiencies of the prior art. Summary of the Invention

[0005] In order to overcome the defects of the prior art, the present invention proposes a method, a system, and an electronic device for judging the pollution of a fuel cell membrane electrode, excluding the influence of the Pt oxide layer and other polarizations, thereby improving the accuracy of pollution judgment and providing an accurate diagnosis basis for the pollution reversible recovery strategy.

[0006] The present invention is realized through the following technical solutions: A method for judging the pollution of a fuel cell membrane electrode, the judging method comprising: S1. When the fuel cell operates under preset conditions, obtain the single-cell voltage of the fuel cell; and, S2. Judge whether the membrane electrode is polluted based on the obtained single-cell voltage of the fuel cell; Among them, the preset conditions include: after the fuel cell operates continuously with a single-cell voltage not greater than the first voltage threshold for no less than the first duration threshold, it reaches the idle current within no more than the second duration threshold.

[0007] As a further improved technical solution, in step S1, the obtaining of the single-cell voltage of the fuel cell includes: obtaining the average single-cell voltage within a preset period when the fuel cell is in the idle current state; wherein, the preset period does not exceed 3 min.

[0008] As a further improved technical solution, the preset period is 1 - 2 min after the fuel cell reaches the idle current. Among them, the obtaining of the average single-cell voltage within the preset period when the fuel cell is in the idle current state includes: Obtaining multiple actual single-cell voltage values and calculating their weighted average; or, Obtaining multiple impedance-free voltages U_IRfree and calculating their weighted average, where U_IRfree = U + R * I, U is the actual single-cell voltage, I is the idle current, and R is the high-frequency impedance.

[0009] As a further improved technical solution, the first voltage threshold ranges from 0.68 - 0.7 V, the first duration threshold ranges from 1 - 2 min, and the second duration threshold ranges from 5 - 15 s.

[0010] As a further improved technical solution, the preset conditions further include: the outlet water temperature of the fuel cell stack is a preset temperature value.

[0011] As a further improved technical solution, the preset temperature value is 50 - 70 °C.

[0012] As a further improved technical solution, the method includes: repeating step S1 multiple times to obtain multiple single-cell voltage data, and performing an extreme value removal moving average process on the multiple single-cell voltage data.

[0013] The present invention is also implemented through the following technical solution: a judgment system for fuel cell membrane electrode contamination, which is used to monitor the performance parameters of the fuel cell during the operation of the fuel cell. The judgment system includes: A condition recognition module for monitoring whether the fuel cell meets the preset conditions during operation; among them, the preset conditions include: after the fuel cell operates continuously with a single-cell voltage not greater than the first voltage threshold for no less than the first duration threshold, it reaches the idle current within no more than the second duration threshold; A performance point extraction module for obtaining the single-cell voltage of the fuel cell when the preset conditions are met; and A comparison and judgment module for judging whether the membrane electrode is contaminated based on the obtained single-cell voltage of the fuel cell.

[0014] As a further improved technical solution, the judgment system further includes: A performance point discarding module, configured to discard the obtained single-cell voltage of the fuel cell when the operation of the fuel cell meets the discarding condition; the discarding condition includes: the current of the fuel cell rises and exits the idle current state within a preset time period; wherein, the preset time period does not exceed 3 minutes; A data processing module, configured to perform an extreme value removal sliding average process on multiple single-cell voltage data obtained by triggering a preset condition multiple times.

[0015] The present invention is also implemented through the following technical solution: An electronic device, which includes a memory, a processor, and program code stored on the memory and executable on the processor. When the processor executes the program code, the judgment method for fuel cell membrane electrode contamination as described above is implemented.

[0016] The judgment method for fuel cell membrane electrode contamination provided by the present invention realizes that, by setting a preset condition - after the fuel cell continuously operates with a single-cell voltage not greater than a first voltage threshold for not less than a first duration threshold, it reaches the idle current within no more than a second duration threshold, the fuel cell operates under a precondition of low potential to remove the Pt oxide layer and eliminate the influence of the Pt oxide layer on performance; then it quickly enters the idle point state to perform performance detection at the idle point and perform performance trend diagnosis at the idle point, which can reduce the misjudgment of performance caused by factors such as flooding. At the same time, the idle point is the lowest operating current point of the fuel cell, which better reflects the activation polarization of the catalyst, and the polarization loss in this part has a strong correlation with the membrane electrode contamination. The solution of the present invention excludes the influence of the Pt oxide layer and other polarizations, improves the accuracy of membrane electrode contamination judgment, and can provide an accurate diagnostic basis for the reversible recovery strategy of membrane electrode contamination. Description of the Drawings

[0017] Figure 1 is a flowchart of an embodiment of the judgment method for fuel cell membrane electrode contamination of the present invention.

[0018] Figure 2 is a system module diagram of an embodiment of the judgment system for fuel cell membrane electrode contamination of the present invention. Detailed Embodiments

[0019] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0020] The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] The present invention provides a method for judging the contamination of a fuel cell membrane electrode. Through the optimization of the performance identification algorithm, under the precondition of the fuel cell operating at a low potential to remove the Pt oxide layer and then quickly entering the operating condition of the idle point, performance detection and diagnosis are carried out, excluding the influence of the Pt oxide layer and other polarizations, and improving the accuracy of judging the contamination of the membrane electrode.

[0022] Specifically, the method for judging the contamination of the fuel cell membrane electrode includes: S1. When the fuel cell operation meets the preset conditions, obtain the single-cell voltage of the fuel cell; and, S2. Judge whether the membrane electrode is contaminated based on the obtained single-cell voltage of the fuel cell; Wherein, the preset conditions include: the fuel cell continuously operates with a single-cell voltage not greater than the first voltage threshold for not less than the first duration threshold and reaches the idle current within not more than the second duration threshold.

[0023] When the above preset conditions are met, the Pt oxide layer of the fuel cell membrane electrode is removed and not regenerated again, excluding the influence of the Pt oxide layer on the performance of the membrane electrode, and performing performance trend diagnosis at the idle point, reducing the influence of factors such as flooding and other polarization superpositions on the performance of the membrane electrode, and improving the accuracy of judging the contamination of the membrane electrode.

[0024] The method for judging the contamination of the membrane electrode described in the present invention particularly relates to the cathode in the membrane electrode assembly. Under the conventional operating conditions of the fuel cell, especially when operating at a high load or high potential, the Pt catalyst surface of the cathode is prone to oxidation reaction with oxygen or water to form Pt oxides, such as PtO, PtO 2, or surface-adsorbed oxygen ions or hydroxide ions; while the Pt oxide layer and adsorbates will cover the active sites, hindering the oxygen reduction reaction (ORR), which is manifested as the performance degradation of the fuel cell. It is usually difficult to distinguish the performance degradation of the fuel cell caused by the Pt oxide layer and adsorbates from that caused by cathode contamination through performance, so the misjudgment rate of cathode contamination in existing solutions is relatively high. The present invention utilizes the reduction reaction mechanism when the fuel cell operates at a low potential to remove the Pt oxide layer. Specifically, when the cathode potential drops below the thermodynamic reduction potential of the Pt oxide, at this time, the Pt oxide undergoes an electrochemical reduction reaction, converting the Pt oxide into metallic Pt, restoring the active sites on its surface, and improving the ORR efficiency; at the same time, the cathode oxygen partial pressure or reaction rate decreases at a low potential, which can also inhibit the further oxidation of Pt.

[0025] In some embodiments, the first voltage threshold ranges from 0.68 V to 0.7 V to ensure that the electrochemical reduction reaction of the Pt oxide can proceed smoothly; the first duration threshold ranges from 1 min to 2 min to allow the electrochemical reduction reaction of the Pt oxide to continue for a sufficient duration to ensure that the Pt oxide layer is effectively removed; the second duration threshold ranges from 5 s to 15 s, that is, to ensure that after the Pt oxide layer is removed, it enters the idle point within a short time to avoid the re-generation of the Pt oxide. In a specific embodiment, the first voltage threshold is selected as 0.7 V, the first duration threshold is selected as 1 min, and the second duration threshold is selected as 10 s.

[0026] It should be noted that in a specific embodiment, the method for judging the contamination of the fuel cell membrane electrode proposed in the present application is implemented when the fuel cell system is in the normal daily operation mode. That is, the user (such as the driver of a vehicle equipped with a fuel cell system) normally uses the fuel cell system without deliberately meeting the above preset conditions. The judgment system monitors the operating state of the fuel cell system. When it detects that the fuel cell system meets the above preset conditions, the judgment system extracts data and makes a judgment to obtain a conclusion on whether the fuel cell is contaminated. Of course, in some periods or some times, it is possible that the above preset conditions do not occur when the user normally uses the fuel cell system. However, since the above judgment method is embedded in the fuel cell system, as long as the fuel cell system operates, the above judgment method is executed, which constitutes the daily monitoring of the fuel cell system and can always extract sufficient data for contamination judgment within a period of time.

[0027] In another specific embodiment, the method for judging the contamination of the fuel cell membrane electrode proposed in the present application can also be implemented in a preset contamination determination mode. The so-called preset contamination determination mode means that the operation of the fuel cell system is controlled by a preset program or a preset manual operation step to make the fuel cell system meet the above preset conditions.

[0028] Further, the preset conditions further include: the outlet water temperature of the fuel cell stack is a preset temperature value. In some embodiments, the preset temperature value is 50-70°C. By further including the limitation of the temperature value in the preset conditions, the present application avoids the influence of different temperatures on the performance of the membrane electrode and the influence of high temperature on the formation rate of the Pt oxide layer, further eliminates the performance difference of the fuel cell caused by temperature difference, so as to ensure a relatively single corresponding relationship between the fuel cell performance and the pollution degree, and improves the accuracy of membrane electrode pollution judgment.

[0029] Continuing back to the process of the judgment method below, after the operation of the fuel cell meets the above preset conditions, the single-cell voltage of the fuel cell is obtained. In step S1, the obtaining of the single-cell voltage of the fuel cell includes: obtaining the average single-cell voltage within a preset period when the fuel cell is in the idle current state; wherein, the preset period does not exceed 3 minutes. When the fuel cell is in the idle current state, that is, when the fuel cell enters the idle point, it is the state where the fuel cell system operates at the lowest power point. A long operation time of the fuel cell in the idle current state will also cause the Pt oxide layer to form again. Therefore, the extraction of the performance point should be completed within a short time after entering the idle current state. In some embodiments, the preset period is 1-2 minutes after the fuel cell reaches the idle current, and the data of the fuel cell in the idle current state exceeding the preset period is not used for statistical analysis. Such a setting enables the fuel cell system to enter a stable idle current state, and the Pt oxide layer does not regenerate due to the increase in the idle time, so as to ensure that the performance data of the fuel cell is obtained in the idle state without an oxide layer, and this data can more intuitively indicate the pollution condition of the membrane electrode.

[0030] In some embodiments, obtaining the average single-cell voltage within a preset period when the fuel cell is in the idle current state may specifically include two methods: one is to obtain multiple actual single-cell voltage values and calculate their weighted average; for example, if the preset period is 1 minute and the voltage is collected every 1 second, then 60 single-cell voltage data will be collected, and the average voltage is the weighted average of these 60 numbers; the other is to obtain multiple impedance-free voltages U_IRfree and calculate their weighted average, where U_IRfree = U + R*I, U is the actual single-cell voltage, I is the idle current, and R is the high-frequency impedance; for example, if the preset period is 1 minute and it is collected once every 1 second, then 60 single-cell impedance-free voltage data will be collected, and the average impedance-free voltage is the weighted average of these 60 data. That is, to characterize the single-cell performance of the fuel cell stack, the actual voltage value or the impedance-free voltage U_IRfree can be used. Whether the actual voltage value or the impedance-free voltage U_IRfree is used, it should be understood as the single-cell voltage described in the present application.

[0031] When the fuel cell system enters the performance point extraction stage after meeting the preset conditions, if the current of the fuel cell rises and exits the idle current state within the preset time period, the data extracted this time is not used as the data for statistical analysis. Under the normal operating state of the fuel cell system, it may occur that the operation of the fuel cell system meets the preset conditions, but it may exit the idle current state in a very short time, such as the current rising. In this case, the fuel cell system is not stable in the idle current state, and the statistical data has a high abnormality and distortion rate, so it should be excluded.

[0032] Furthermore, the method includes repeating step S1 multiple times to obtain multiple single-cell voltage data, and performing an extreme value removal moving average process on the multiple single-cell voltage data. When each preset condition is met, the single-cell voltage value is obtained multiple times, and then the average is taken as the single-point value of the performance extracted this time, that is, when each preset condition is met, a single-point value can be obtained; when multiple preset conditions are met, multiple single-point values can be obtained. Perform an extreme value removal moving average process on the obtained multiple single-point values to eliminate abnormal points and ensure the accuracy of the data.

[0033] The following exemplarily illustrates the specific process of the extreme value removal moving average process. Assuming that the moving average is based on 5 points, the fuel cell performance points picked up based on the above preset conditions are the following time series: t_(n)=0.81, t_(n-1)=0.82, t_(n-3)=0.825, t_(n-4)=0.805, t_(n-5)=0.812; where t_(n) is the performance point picked up at the current moment, t_(n-1) is the performance pick-up point obtained when the previous preset condition was met, and so on; the 5-point extreme value removal moving average process based on the performance of this sequence is to first remove the maximum value t_(n-3)=0.825 and the minimum value t_(n-4)=0.805, and then add the remaining performance points and take the average.

[0034] As can be seen from the above description, the present invention effectively avoids misjudgment of performance caused by Pt oxidation by introducing the precondition of Pt oxide layer removal, and by limiting the time interval for performance statistics at the idle point, it avoids the reformation of the Pt oxide layer due to long-term operation, and further eliminates abnormal points through the extreme value removal moving average to ensure the accuracy of the data.

[0035] Please refer to Figure 1 as shown, which is an exemplary embodiment of the method for judging the contamination of the fuel cell membrane electrode of the present invention, and it includes: Initial stage s0: The fuel cell operates normally without performing performance trend diagnosis; The first stage s1: The process of removing the Pt oxide layer, that is, before entering the idle point, it is judged whether the fuel cell has been continuously operating under the condition that the single-cell voltage is <0.7V for more than 1 minute and then enters s2 to remove the oxide layer on the Pt surface; The second stage s2: After completing s1, enter this state and wait; The third stage s3: The idle state without oxide layer, that is, when the precondition is met, the fuel cell enters the idle point, and it is judged whether the idle current is reached within 10 seconds; if not, it returns to the initial stage s0; The fourth stage s4: The stable point performance statistics stage. In the stable state, the average single-cell voltage of the fuel cell is calculated for 1 - 2 minutes. When the time exceeds 2 minutes, it returns to the initial stage s0; or, within 2 minutes, if the fuel cell current rises and exits the idle state, it also returns to the initial stage s0, and no performance point is extracted this time; The fifth stage s5: Repeat the above four stages to obtain multiple performance point data, and perform extreme value removal and moving average filtering on the obtained data; Subsequent stage: Performance judgment and subsequent operations, that is, according to the filtered performance data, it is judged whether there is serious pollution on the cathode of the fuel cell; and further, if the performance is lower than the threshold, a performance recovery operation is triggered.

[0036] Please refer to Figure 2 As shown, the present invention also provides a judgment system for fuel cell membrane electrode pollution, which is used to monitor the performance parameters of the fuel cell during the operation of the fuel cell. The judgment system includes: A condition identification module for monitoring whether the fuel cell meets a preset condition during operation; wherein, the preset condition includes: the fuel cell continuously operates at a single-cell voltage not greater than a first voltage threshold for not less than a first duration threshold and reaches the idle current within not more than a second duration threshold; A performance point extraction module for obtaining the single-cell voltage of the fuel cell when the preset condition is met; and A comparison and judgment module for judging whether the membrane electrode is polluted based on the obtained single-cell voltage of the fuel cell.

[0037] Further, the judgment system further includes: A performance point discarding module for discarding the obtained single-cell voltage of the fuel cell when the operation of the fuel cell meets the discarding condition; the discarding condition includes: the current of the fuel cell rises and exits the idle current state within a preset period; wherein, the preset period does not exceed 3 minutes; A data processing module for performing extreme value removal and moving average processing on multiple single-cell voltage data obtained by triggering the preset condition multiple times.

[0038] The fuel cell membrane electrode contamination judgment system provided by the present invention can execute the judgment method as described above. The functions and roles of each module can be understood by referring to the description of the judgment method above, and will not be elaborated here.

[0039] The present invention also provides an electronic device, which includes a memory, a processor, and program code stored on the memory and executable on the processor. When the processor executes the program code, the fuel cell membrane electrode contamination judgment method as described above is implemented.

[0040] From the description of the specific embodiments above, it can be seen that the fuel cell membrane electrode contamination judgment method, system, and electronic device provided by the present invention have significant improvements and advantages compared with the traditional technology, mainly reflected in the following aspects: 1. The influence of the Pt oxide layer on the performance trend improves the accuracy of cathode contamination diagnosis. The traditional method does not fully consider the influence of the Pt oxide layer on the performance trend, which easily leads to misjudgment of low performance. The present invention effectively avoids misjudgment of performance caused by Pt oxidation by introducing Pt oxide layer removal as a precondition. For example, by requiring the precondition of the idle point to be in a low potential (<0.7V) and running for more than 1 minute, the Pt surface oxide layer can be effectively removed, thereby more accurately identifying the activation performance of the fuel cell stack.

[0041] 2. Optimize the selection of performance trend statistical sampling points. The present invention only selects the time period within 1 - 3 minutes after entering the idle point as the performance trend statistical sampling point, avoiding the interference of the Pt surface oxide layer on the performance at high potential and low current density. This optimized selection method not only improves the diagnostic efficiency but also ensures the accuracy of performance trend statistics, further improving the diagnostic accuracy.

[0042] 3. Avoid the influence of water temperature change on performance. The present invention also considers the influence of water temperature on the performance of the idle point, and requires that the selected performance points need to meet the same temperature range for statistics, thereby ensuring the reliability of the diagnostic results.

[0043] 4. Lay the foundation for triggering the reversible recovery strategy. By accurately identifying cathode contamination, the present invention can provide strong support for the diagnosis of fuel cells when cathode contamination occurs. Accurate diagnostic results help to timely detect cathode contamination problems, thereby providing an accurate basis for triggering subsequent reversible recovery strategies. For example, when cathode contamination is diagnosed, corresponding recovery measures can be taken according to the degree and type of contamination, such as adjusting the operating conditions, performing chemical cleaning, etc., thereby extending the service life of the fuel cell and improving its operating efficiency.

[0044] The present invention is illustrated by several specific embodiments. Those skilled in the art should understand that various transformations and equivalent substitutions can be made to the present invention without departing from the scope of the present invention. Additionally, various modifications can be made to the present invention for a specific situation or circumstance without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed, but should include all embodiments falling within the scope of the claims of the present invention.

Claims

1. A method for determining the contamination of a fuel cell membrane electrode, characterized in that: The determination method comprises: S1. When the operation of the fuel cell meets a preset condition, obtaining a single-chip voltage of the fuel cell; and, S2, judging whether the membrane electrode is contaminated based on the obtained single-chip voltage of the fuel cell; The preset conditions include: after the fuel cell continuously operates for not less than a first time threshold with a single-chip voltage not greater than a first voltage threshold, the fuel cell reaches an idle current within a time threshold not exceeding a second time threshold.

2. The method for determining fuel cell membrane electrode contamination according to claim 1, characterized in that: In step S1, the obtaining of the single-chip voltage of the fuel cell includes: obtaining the average single-chip voltage of the fuel cell in a preset period of time when the fuel cell is in an idle current state; wherein the preset period of time does not exceed 3 minutes.

3. The method for determining fuel cell membrane electrode contamination according to claim 2, characterized in that: The preset period is 1-2 minutes after the fuel cell reaches the idle current, wherein obtaining the average single-chip voltage of the fuel cell in the preset period when the fuel cell is in the idle current state includes: Obtain multiple actual voltage values ​​of single chips and calculate their weighted average value; or, Obtain multiple impedance-free voltages U_IRfree and calculate their weighted average value, where U_IRfree=U+R*I, U is the actual voltage of the single chip, I is the idle current, and R is the high-frequency impedance.

4. The method for determining fuel cell membrane electrode contamination according to claim 2, characterized in that: The first voltage threshold is set at 0.68-0.7V, the first time threshold is set at 1-2min, and the second time threshold is set at 5-15s.

5. The method for determining fuel cell membrane electrode contamination according to any one of claims 1 to 4, characterized in that: The preset condition also includes: the outlet water temperature of the fuel cell stack is a preset temperature value.

6. The method for determining fuel cell membrane electrode contamination according to claim 5, characterized in that: The preset temperature value is 50-70°C.

7. The method for determining fuel cell membrane electrode contamination according to claim 5, characterized in that: The method comprises: repeating step S1 for multiple times to obtain a plurality of single-chip voltage data, and performing a de-extreme value sliding average process on the plurality of single-chip voltage data.

8. A fuel cell membrane electrode contamination judgment system, used to monitor the performance parameters of the fuel cell during the operation of the fuel cell, characterized in that: The judgment system comprises: A condition identification module is used to monitor whether the fuel cell meets a preset condition during operation; wherein the preset condition includes: after the fuel cell continuously operates with a single-chip voltage not greater than a first voltage threshold for not less than a first time threshold, it reaches an idle current within a time threshold not exceeding a second time threshold; a performance point extraction module, for obtaining a single-chip voltage of the fuel cell when the preset condition is satisfied; and The comparison and judgment module is used to judge whether the membrane electrode is contaminated based on the obtained single-chip voltage of the fuel cell.

9. The fuel cell membrane electrode contamination judgment system according to claim 8, characterized in that: The judgment system also includes: A performance point abandonment module, used to abandon the obtained single-chip voltage of the fuel cell when the operation of the fuel cell meets the abandonment condition; the abandonment condition includes: the current of the fuel cell rises and leaves the idle current state within a preset period of time; wherein the preset period of time does not exceed 3 minutes; The data processing module is used to perform extreme value sliding average processing on multiple single-chip voltage data obtained by triggering preset conditions multiple times.

10. An electronic device comprising a memory, a processor, and a program code stored in the memory and executable on the processor, wherein: When the processor executes the program code, the method for determining the contamination of the fuel cell membrane electrode as claimed in any one of claims 1 to 7 is implemented.

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