Fuel cell on-line reversible attenuation performance recovery method, device, equipment and medium

Abstract

The invention relates to the technical field of fuel cells, in particular to a fuel cell online reversible attenuation performance recovery method, device, equipment and medium, and the method comprises the following steps: obtaining attenuated rated power and reference rated power; calculating a rated power attenuation amplitude according to the attenuated rated power and the reference rated power, and determining a current attenuation grade according to the rated power attenuation amplitude; and determining a target recovery strategy according to the current attenuation level, and performing performance recovery processing on the fuel cell according to the target recovery strategy. Therefore, by dynamically evaluating the attenuation amplitude of the rated power of the fuel cell, dividing the attenuation level and matching the adaptive recovery strategy, the problems of low recovery efficiency and the like caused by poor applicability of hardware disassembly and assembly and a single strategy in related technologies are solved, and the recovery efficiency of the fuel cell is improved.

Description

Technical Field

[0001] This application relates to the field of fuel cell technology, and in particular to a method, apparatus, equipment and medium for online reversible degradation performance recovery of fuel cells. Background Technology

[0002] In the actual operation of fuel cell engines, deviations from operating conditions can lead to faults such as membrane dryness and flooding, disrupting the stack's water balance and causing performance degradation. Long-term accumulation of these issues can result in material damage. Dynamic load increases and decreases, as well as voltage fluctuations during start-up and shutdown, accelerate catalyst agglomeration, dissolution, and carbon support corrosion. Impurities such as CO, nitrides, and sulfides in hydrogen and oxygen, along with sulfide contaminants from aging rubber tubing, can poison the catalyst upon entering the stack, occupying reactive sites and affecting reaction rates. Corrosion of metal tubing and electrode plates introduces Fe2+, promoting proton exchange membrane degradation and leading to irreversible degradation. Therefore, it is necessary to develop corresponding recovery strategies for reversible degradation to improve engine reliability and lifespan.

[0003] In related technologies, most performance recovery is achieved through simple physical or electrochemical means. Method (1) proposes four different recovery strategies based on the battery output power attenuation ratio: clean air purging and battery open circuit method, cyclic voltammetry (CV) scanning method, voltage pulse method, and platinum-carbon catalyst recycling method. Method (2) proposes that if the power attenuation is greater than the threshold, the voltage is circulated within the range of 0.2-0.7V by decreasing and increasing the reaction gas pressure to remove the oxide film on the cathode catalyst surface to complete the performance recovery. Method (3) proposes that if the power attenuation exceeds the threshold, an emergency shutdown is performed and the hydrogen input is interrupted while oxygen is continuously supplied to promote oxygen permeation to the anode to oxidize CO and thus restore the performance attenuation caused by CO poisoning.

[0004] However, the recycling and reuse of the platinum-carbon catalyst in method (1) requires disassembling and reassembling system components, which has a significant impact on system stability; the voltage cycling method in method (2) requires frequent pressure changes, and long-term use may cause stress fatigue of the proton exchange membrane, affecting the lifespan of the proton exchange membrane; the oxygen permeation method in method (3) is only for the performance degradation caused by CO poisoning, and is not very applicable to other possible degradation sources, which urgently needs to be addressed. Summary of the Invention

[0005] This application provides a method, apparatus, equipment, and medium for online reversible degradation performance recovery of fuel cells, which solves the problems of low recovery efficiency caused by hardware disassembly and assembly and poor applicability of single strategies in related technologies, thereby improving the recovery efficiency of fuel cells.

[0006] The first aspect of this application provides a method for restoring the online reversible degradation performance of a fuel cell, including the following steps:

[0007] Obtain the attenuated rated power and the reference rated power;

[0008] The rated power attenuation range is calculated based on the attenuated rated power and the reference rated power, and the current attenuation level is determined based on the rated power attenuation range.

[0009] A target recovery strategy is determined based on the current attenuation level, and the fuel cell is subjected to performance recovery processing according to the target recovery strategy.

[0010] Optionally, determining the current attenuation level based on the rated power attenuation magnitude includes:

[0011] If the rated power attenuation range is within the first range, then the current attenuation level is the first level;

[0012] If the rated power attenuation range is within the second range, then the current attenuation level is the second level, wherein the lower limit of the second range is greater than the upper limit of the first range.

[0013] Optionally, the current attenuation level is the first level, and the step of determining a target recovery strategy based on the current attenuation level and performing performance recovery processing on the fuel cell according to the target recovery strategy includes:

[0014] Based on a preset low-temperature humidification recovery strategy, the fuel cell undergoes performance recovery processing, wherein the preset low-temperature humidification recovery strategy is as follows:

[0015] Based on a preset first hydrogen supply strategy, hydrogen is supplied to the anode of the fuel cell stack;

[0016] Based on a preset first establishment voltage strategy, oxygen is supplied to the cathode of the fuel cell stack;

[0017] Based on the current density points within a preset range, the fuel cell is subjected to a load-bearing process, and it is determined whether the current load-bearing time has reached the preset time.

[0018] When the current load duration reaches the preset duration, based on the preset inlet temperature range and preset temperature difference, the coolant inlet temperature of the fuel cell stack is reduced, and the load of the fuel cell stack is reduced to the preset idle point. Then, based on the preset load strategy, the fuel cell is loaded to the rated power point.

[0019] Optionally, the current attenuation level is the second level, and the step of determining a target recovery strategy based on the current attenuation level and performing performance recovery processing on the fuel cell according to the target recovery strategy includes:

[0020] Based on the preset low-temperature humidification recovery strategy and / or the preset online potential cycling recovery strategy, the fuel cell undergoes performance recovery processing, wherein the preset online potential cycling recovery strategy is as follows:

[0021] Based on a preset second hydrogen supply strategy, hydrogen is supplied to the anode of the fuel cell stack;

[0022] Based on a preset second establishment voltage strategy, oxygen is provided to the cathode of the fuel cell stack;

[0023] Based on a preset oxygen-consuming discharge strategy, the fuel cell is subjected to multiple oxygen-consuming discharges to reduce the catalyst with a preset low voltage or to reduce the catalyst with a preset hydrogen pump effect, and the current open-circuit voltage is obtained.

[0024] If the current open-circuit voltage is less than the preset voltage, a preset air immersion strategy is executed.

[0025] Optionally, after performing performance recovery processing on the fuel cell according to the target recovery strategy, the method further includes:

[0026] Calculate the attenuation magnitude after recovery;

[0027] If the attenuation after recovery is less than a preset threshold, then the target recovery strategy is terminated.

[0028] Optionally, the rated power attenuation range is:

[0029]

[0030] Where dPe is the rated power attenuation range, Pe is the rated power after attenuation, and Pe ref The reference rated power is [value].

[0031] A second aspect of this application provides an online reversible degradation performance recovery device for fuel cells, comprising:

[0032] The acquisition module is used to acquire the attenuated rated power and the reference rated power;

[0033] The determination module is used to calculate the rated power attenuation range based on the attenuated rated power and the reference rated power, and to determine the current attenuation level based on the rated power attenuation range.

[0034] The recovery module is used to determine a target recovery strategy based on the current attenuation level, and to perform performance recovery processing on the fuel cell according to the target recovery strategy.

[0035] Optionally, the determining module is specifically used for:

[0036] If the rated power attenuation range is within the first range, then the current attenuation level is the first level;

[0037] If the rated power attenuation range is within the second range, then the current attenuation level is the second level, wherein the lower limit of the second range is greater than the upper limit of the first range.

[0038] Optionally, the current attenuation level is the first level, and the recovery module is specifically used for:

[0039] Based on a preset low-temperature humidification recovery strategy, the fuel cell undergoes performance recovery processing, wherein the preset low-temperature humidification recovery strategy is as follows:

[0040] Based on a preset first hydrogen supply strategy, hydrogen is supplied to the anode of the fuel cell stack;

[0041] Based on a preset first establishment voltage strategy, oxygen is supplied to the cathode of the fuel cell stack;

[0042] Based on the current density points within a preset range, the fuel cell is subjected to a load-bearing process, and it is determined whether the current load-bearing time has reached the preset time.

[0043] When the current load duration reaches the preset duration, based on the preset inlet temperature range and preset temperature difference, the coolant inlet temperature of the fuel cell stack is reduced, and the load of the fuel cell stack is reduced to the preset idle point. Then, based on the preset load strategy, the fuel cell is loaded to the rated power point.

[0044] Optionally, the current attenuation level is the second level, and the recovery module is specifically used for:

[0045] Based on the preset low-temperature humidification recovery strategy and / or the preset online potential cycling recovery strategy, the fuel cell undergoes performance recovery processing, wherein the preset online potential cycling recovery strategy is as follows:

[0046] Based on a preset second hydrogen supply strategy, hydrogen is supplied to the anode of the fuel cell stack;

[0047] Based on a preset second establishment voltage strategy, oxygen is provided to the cathode of the fuel cell stack;

[0048] Based on a preset oxygen-consuming discharge strategy, the fuel cell is subjected to multiple oxygen-consuming discharges to reduce the catalyst with a preset low voltage or to reduce the catalyst with a preset hydrogen pump effect, and the current open-circuit voltage is obtained.

[0049] If the current open-circuit voltage is less than the preset voltage, a preset air immersion strategy is executed.

[0050] Optionally, after performing performance recovery processing on the fuel cell according to the target recovery strategy, the recovery module is further configured to:

[0051] Calculate the attenuation magnitude after recovery;

[0052] If the attenuation after recovery is less than a preset threshold, then the target recovery strategy is terminated.

[0053] Optionally, the rated power attenuation range is:

[0054]

[0055] Where dPe is the rated power attenuation range, Pe is the rated power after attenuation, and Pe ref The reference rated power is [value].

[0056] A third aspect of this application provides an electronic device, including: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being configured to perform the online reversible degradation performance recovery method for fuel cells as described in the above embodiments.

[0057] A fourth aspect of this application provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the online reversible degradation performance recovery method for fuel cells as described in the above embodiments.

[0058] A fifth aspect of this application provides a computer program product storing a computer program that, when executed by a processor, implements the online reversible degradation performance recovery method for fuel cells as described in the above embodiments.

[0059] Therefore, this application embodiment obtains the degraded rated power and the reference rated power, calculates the rated power degrade magnitude based on the degraded rated power and the reference rated power, and determines the current degrade level based on the rated power degrade magnitude; it then determines the target recovery strategy based on the current degrade level and performs performance recovery processing on the fuel cell according to the target recovery strategy. Thus, by dynamically evaluating the rated power degrade magnitude of the fuel cell, classifying degrade levels, and matching adaptive recovery strategies, the low recovery efficiency caused by hardware disassembly and assembly and poor applicability of a single strategy in related technologies is solved, thereby improving the recovery efficiency of the fuel cell.

[0060] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0061] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0062] Figure 1 This is a flowchart of a method for restoring the online reversible degradation performance of a fuel cell according to an embodiment of this application;

[0063] Figure 2 This is a schematic diagram illustrating the recovery principle of a preset low-temperature humidification strategy in a fuel cell online reversible degradation performance recovery method according to an embodiment of this application.

[0064] Figure 3 This is a schematic diagram illustrating the recovery verification results of a preset low-temperature humidification strategy for a fuel cell online reversible degradation performance recovery method according to an embodiment of this application.

[0065] Figure 4 This is a schematic diagram illustrating the recovery principle of a preset online potential cycle recovery strategy in a fuel cell online reversible degradation performance recovery method according to an embodiment of this application;

[0066] Figure 5 This is a schematic diagram illustrating the recovery verification results of a preset online potential cycle recovery strategy for a fuel cell online reversible degradation performance recovery method according to an embodiment of this application;

[0067] Figure 6 This is a flowchart illustrating the recovery strategy judgment logic of a fuel cell online reversible degradation performance recovery method according to an embodiment of this application;

[0068] Figure 7 This is a flowchart illustrating the working steps of a method for restoring the online reversible degradation performance of a fuel cell according to an embodiment of this application.

[0069] Figure 8 This is a schematic diagram of an online reversible degradation performance recovery device for fuel cells according to an embodiment of this application;

[0070] Figure 9 This is a schematic diagram of the structure of an electronic device provided according to an embodiment of this application. Detailed Implementation

[0071] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0072] The following describes a method, apparatus, device, and medium for online reversible degradation performance recovery of fuel cells according to embodiments of this application, with reference to the accompanying drawings. Addressing the low recovery efficiency issues in related technologies mentioned in the background section due to hardware disassembly and assembly and poor applicability of single strategies, this application provides an online reversible degradation performance recovery method for fuel cells. In this method, embodiments of this application obtain the rated power after degradation and the reference rated power, calculate the rated power degradation amplitude based on the rated power after degradation and the reference rated power, and determine the current degradation level based on the rated power degradation amplitude; determine the target recovery strategy based on the current degradation level, and perform performance recovery processing on the fuel cell according to the target recovery strategy. Therefore, by dynamically evaluating the rated power degradation amplitude of the fuel cell, classifying degradation levels, and matching adaptive recovery strategies, the low recovery efficiency issues caused by hardware disassembly and assembly and poor applicability of single strategies in related technologies are solved, thereby improving the recovery efficiency of fuel cells.

[0073] Specifically, Figure 1 This is a schematic flowchart illustrating an online reversible degradation performance recovery method for a fuel cell provided in an embodiment of this application.

[0074] like Figure 1 As shown, the method for restoring the online reversible degradation performance of a fuel cell includes the following steps:

[0075] In step S101, the attenuated rated power and the reference rated power are obtained.

[0076] Among them, the rated power after degradation is the maximum power value that the fuel cell engine can actually stably output after its performance has degraded during operation; the reference rated power refers to the maximum power value that the fuel cell engine can stably output in its initial healthy state.

[0077] Specifically, the attenuated rated power and the reference rated power need to be obtained under the same test conditions (such as temperature, humidity, and gas pressure) to provide accurate input for subsequent calculations; the attenuated rated power will decrease as the operating time increases or the operating conditions deteriorate, reflecting the current performance status; the reference rated power serves as a benchmark for performance comparison, used to calculate the attenuation range and assess the gap between the current performance and the ideal state.

[0078] In step S102, the rated power attenuation range is calculated based on the attenuated rated power and the reference rated power, and the current attenuation level is determined based on the rated power attenuation range.

[0079] Optionally, in some embodiments, the rated power attenuation is:

[0080]

[0081] Where dPe is the rated power attenuation range, Pe is the rated power after attenuation, and Peref This is the reference rated power.

[0082] Specifically, based on the attenuated rated power (Pe) and the reference rated power (Pe) ref The percentage of the difference between the rated power and the base rated power is used to calculate the rated power attenuation range (dPe). The current attenuation level is determined based on the attenuation range. This grading mechanism provides a quantitative basis for the selection of subsequent targeted recovery strategies, ensuring that the recovery measures match the degree of attenuation. The attenuation level determination is completed automatically by the control algorithm without human intervention, supporting online performance evaluation and recovery decision-making of fuel cell systems.

[0083] Optionally, in some embodiments, determining the current attenuation level based on the rated power attenuation range includes: if the rated power attenuation range is in a first interval, then the current attenuation level is the first level; if the rated power attenuation range is in a second interval, then the current attenuation level is the second level, wherein the lower limit of the second interval is greater than the upper limit of the first interval.

[0084] The first interval and the second interval can be thresholds preset by the user, thresholds obtained through a limited number of experiments, or thresholds obtained through a limited number of computer simulations; no specific limitations are imposed here.

[0085] It is understood that this invention determines the current attenuation level by dividing the rated power attenuation range into intervals. When 2% ≤ dPe < 5% (first interval), it is determined to be a first-level attenuation (first level); when dPe ≥ 5% (second interval), it is determined to be a second-level attenuation (second level). This interval division method ensures that the starting value (5%) of the second interval is always higher than the maximum value (5%) of the first interval, thereby forming a clear and non-overlapping grading standard, which not only ensures the evaluation efficiency but also ensures the scientific nature of the strategy selection.

[0086] In step S103, a target recovery strategy is determined based on the current attenuation level, and the fuel cell is subjected to performance recovery processing according to the target recovery strategy.

[0087] Specifically, the target recovery strategy is determined based on the current attenuation level, and key parameters such as gas supply, temperature control, stack load, and valve timing are automatically adjusted. By establishing a quantitative correspondence between the attenuation level and the recovery strategy, fully automated closed-loop management from performance evaluation to recovery processing is achieved, which significantly improves the intelligence and reliability of fuel cell system maintenance.

[0088] Optionally, in some embodiments, the current attenuation level is the first level. A target recovery strategy is determined based on the current attenuation level, and the fuel cell is subjected to performance recovery processing according to the target recovery strategy. This includes: performing performance recovery processing on the fuel cell based on a preset low-temperature humidification recovery strategy, wherein the preset low-temperature humidification recovery strategy is: providing hydrogen to the anode of the fuel cell stack based on a preset first hydrogen supply strategy; providing oxygen to the cathode of the fuel cell stack based on a preset first voltage establishment strategy; performing load processing on the fuel cell based on a current density point within a preset range, and determining whether the current load processing time has reached a preset time; if the current load processing time has reached the preset time, reducing the coolant inlet temperature of the fuel cell stack based on a preset inlet temperature range and a preset temperature difference, and reducing the load of the fuel cell stack to a preset idle point, and then loading the fuel cell to the rated power point based on the preset load processing strategy.

[0089] The preset duration, preset inlet temperature range, and preset temperature difference can be thresholds set by the user, thresholds obtained through a limited number of experiments, or thresholds obtained through a limited number of computer simulations; no specific limitations are imposed here.

[0090] Understandably, when the current degradation level is Level 1, the fuel cell performance is restored based on a preset low-temperature humidification recovery strategy; the restoration principle and verification results of the preset low-temperature humidification recovery strategy are as follows: Figure 2 and Figure 3 As shown, Figure 2 This is a schematic diagram illustrating the recovery principle of a preset low-temperature humidification strategy in an embodiment of the fuel cell online reversible degradation performance recovery method according to this application. Figure 3 This diagram illustrates the recovery verification results of a preset low-temperature humidification strategy for a fuel cell online reversible degradation performance recovery method according to an embodiment of this application. Based on a preset first hydrogen supply strategy, hydrogen is supplied to the anode, hydrogen circulation is initiated, and the hydrogen discharge valve is opened to increase the hydrogen concentration. Based on a preset first voltage establishment strategy, oxygen is supplied to the cathode of the fuel cell stack. Air is supplied to establish voltage. Rapid load is applied to prevent prolonged Open Circuit Voltage (OCV), and three electrical density points within the range of 0.2-3 A / cm² are selected for load application. The selected electrical density points are run for a certain period of time at 0.2-3 A / cm², the coolant inlet temperature is set to 10-60°C, and the temperature difference is set to 5-10°C. The coolant temperature is reduced to increase the water concentration inside the fuel cell stack to remove contaminants. The load is reduced to the idle point, and then rapidly applied to the rated power point to verify the recovery effect.

[0091] It should be noted that, in this application embodiment, the reversible performance degradation caused by SO2, H2S, and NOx poisoning of the Pt catalyst is addressed by generating a large amount of condensate under low-temperature conditions, which accelerates the desorption reaction rate of pollutants and promotes the discharge of pollutants. In addition, low-temperature humidification can also quickly replenish water to solve the membrane drying problem caused by long-term storage of the fuel cell stack.

[0092] Optionally, in some embodiments, the current attenuation level is the second level. A target recovery strategy is determined based on the current attenuation level, and the fuel cell is subjected to performance recovery processing according to the target recovery strategy. This includes: performing performance recovery processing on the fuel cell based on a preset low-temperature humidification recovery strategy and / or a preset online potential cycling recovery strategy. The preset online potential cycling recovery strategy is as follows: providing hydrogen to the anode of the fuel cell stack based on a preset second hydrogen supply strategy; providing oxygen to the cathode of the fuel cell stack based on a preset second voltage establishment strategy; performing multiple oxygen-consuming discharges on the fuel cell based on a preset oxygen-consuming discharge strategy to reduce the catalyst with a preset low voltage or reduce the catalyst with a preset hydrogen pump effect, and obtaining the current open-circuit voltage; and executing a preset air immersion strategy when the current open-circuit voltage is less than the preset voltage.

[0093] Understandably, when the current degradation level is Level 2, the fuel cell performance is restored based on a preset low-temperature humidification recovery strategy and / or a preset online potential cycling recovery strategy. The principle and verification results of the online potential cycling recovery are as follows: Figure 4 and Figure 5 As shown, Figure 4 This is a schematic diagram illustrating the recovery principle of a preset online potential cycle recovery strategy in a fuel cell online reversible degradation performance recovery method according to an embodiment of this application. Figure 5 This diagram illustrates the recovery verification results of a preset online potential cycling recovery strategy for a fuel cell online reversible degradation performance recovery method according to an embodiment of this application. Based on a preset second hydrogen supply strategy, hydrogen is supplied, hydrogen cycling is initiated, and the hydrogen discharge valve is opened to increase the hydrogen concentration. Based on a preset second voltage establishment strategy, oxygen is supplied to the cathode of the fuel cell stack. Air is supplied at a low metering ratio to establish voltage. The hydrogen proportioning valve and hydrogen discharge valve are closed, the bleed resistor is activated, and the oxygen-consuming discharge process begins. Multiple oxygen-consuming discharges are performed by repeatedly opening and closing the air inlet and outlet shut-off valves to create a low-voltage / hydrogen pump effect to reduce the catalyst, while gradually consuming hydrogen. When the open-circuit voltage is <200mV, it indicates that the hydrogen is exhausted, and the air immersion process begins. The hydrogen cycling is closed, the hydrogen discharge valve is opened, and the air inlet and outlet shut-off valves are opened and maintained for a certain period to ensure that air fully enters the CO adsorbed by the anodic oxidation.

[0094] It should be noted that the preset online potential cycling recovery strategy combines an oxygen-consuming discharge / air immersion recovery strategy. Oxygen-consuming discharge generates a hydrogen pump effect by controlling the air shortage, transferring protons to the cathode to generate hydrogen that reduces platinum oxide. Simultaneously, the low potential generated under the shortage condition promotes the reduction reaction, restoring the activity of the cathode catalyst. The air immersion system controls the air inlet and outlet shut-off valves and the hydrogen venting valve to ensure sufficient air enters the anode, oxidizing CO to remove contaminants and restoring the anode catalyst activity. The preset online potential cycling recovery strategy can simultaneously restore the activity of both the cathode and anode catalysts, and the strategy meets the online usage requirements of the entire vehicle throughout the process, avoiding the risks associated with disassembling and reassembling equipment.

[0095] Optionally, in some embodiments, after the fuel cell is subjected to performance recovery processing according to the target recovery strategy, the method further includes: calculating the post-recovery attenuation magnitude; if the post-recovery attenuation magnitude is less than a preset threshold, then determining to end the target recovery strategy.

[0096] The preset threshold can be a threshold set by the user, a threshold obtained through a limited number of experiments, or a threshold obtained through a limited number of computer simulations; no specific limitation is made here.

[0097] Understandably, after completing the target recovery strategy, the system will calculate the rated power reduction after recovery in real time and compare it with a preset threshold (such as 2%) to determine whether the reduction after recovery is less than 2%. If the reduction after recovery is less than the preset threshold, it indicates that the performance has met the requirements, and the system will automatically terminate the target recovery strategy to ensure the accuracy and efficiency of the recovery process, avoid unnecessary energy consumption or over-processing, and ensure that the fuel cell performance is restored to the target level.

[0098] Therefore, this application's embodiments calculate the attenuation range based on the attenuated rated power and the baseline rated power, determine the attenuation level based on the attenuation range, accurately identify the engine attenuation state, and provide precise input for the recovery strategy, improving the effectiveness of the strategy response; it determines the performance recovery strategy to be used specifically according to different performance attenuation levels, covering reversible attenuation caused by various problems, improving the accuracy and comprehensiveness of the recovery strategy; it calculates the attenuation range after recovery based on the restored rated power and the baseline rated power, judges whether the performance meets the requirements, dynamically adjusts the recovery strategy, and realizes the self-repair capability of the performance recovery strategy; this invention can be used online at the vehicle end throughout the entire process, and all recovery strategies can be completed online through only the control program, avoiding the risk of hardware disassembly and assembly, and improving the feasibility and convenience of the recovery strategy in online application of the vehicle.

[0099] To facilitate those skilled in the art to further understand the fuel cell online reversible degradation performance recovery method of the embodiments of this application, the following is combined with Figure 6 and Figure 7 The embodiments shown will be described in detail.

[0100] Specifically, such as Figure 6 As shown, Figure 6 The present invention provides a flowchart of the recovery strategy judgment logic of an online reversible degradation performance recovery method for fuel cells according to an embodiment of the present application, which includes the following steps: starting the performance recovery process, calculating the degradation rate based on the baseline rated power and the current rated power after degradation; then comparing the degradation level and selecting the corresponding recovery strategy to execute; recalculating dPe after recovery, and ending the process if dPe < 2%; otherwise, repeatedly executing the recovery strategy until the target is met.

[0101] Furthermore, such as Figure 7 As shown, Figure 7 This document presents a flowchart illustrating the recovery strategy steps of an online reversible degradation performance recovery method for a fuel cell, according to one embodiment of this application. The steps include: First, obtaining the current Pe and dPe, calculating the degradation magnitude dPe; if dPe ≥ 2%, proceeding to the graded recovery process; otherwise, ending the process (no recovery required). Then, if the degradation magnitude is at the first level (2% ≤ dPe < 5%), executing a preset low-temperature humidification recovery strategy; if the degradation magnitude is at the second level (dPe ≥ 5%), executing a preset low-temperature humidification recovery strategy and / or a preset online potential cycling recovery strategy; real-time monitoring of the recovered dPe; if it meets the standard (dPe < 2%), terminating the recovery strategy; otherwise, adjusting the strategy parameters or upgrading the strategy level.

[0102] Therefore, this invention addresses the problems of current recovery strategies affecting system stability, component lifespan, and limited applicability to various degradation sources. By constructing a dynamic degradation level evaluation mechanism and an adaptive recovery strategy matching method, it achieves precise control of the recovery strategy for reversible degradation caused by various issues such as gas impurities, condition deviations, and long-term operation. Furthermore, this strategy can be completed online during vehicle operation, improving the effectiveness and convenience of fuel cell performance recovery.

[0103] According to the fuel cell online reversible degradation performance recovery method proposed in this application, the method obtains the rated power after degradation and the reference rated power, calculates the rated power degradation range based on the rated power after degradation and the reference rated power, and determines the current degradation level based on the rated power degradation range; determines the target recovery strategy based on the current degradation level, and performs performance recovery processing on the fuel cell according to the target recovery strategy. Therefore, by dynamically evaluating the rated power degradation range of the fuel cell, classifying degradation levels, and matching adaptive recovery strategies, the method solves the problems of low recovery efficiency caused by hardware disassembly and assembly and poor applicability of single strategies in related technologies, thus improving the recovery efficiency of fuel cells.

[0104] Next, referring to the accompanying drawings, a fuel cell online reversible degradation performance recovery device according to an embodiment of this application is described.

[0105] Figure 8 This is a block diagram of an online reversible degradation performance recovery device for fuel cells according to an embodiment of this application.

[0106] like Figure 8 As shown, the fuel cell online reversible degradation performance recovery device 10 includes: an acquisition module 100, a determination module 200, and a recovery module 300.

[0107] Among them, the acquisition module 100 is used to acquire the attenuated rated power and the reference rated power;

[0108] The determination module 200 is used to calculate the rated power attenuation range based on the attenuated rated power and the reference rated power, and to determine the current attenuation level based on the rated power attenuation range.

[0109] The recovery module 300 is used to determine the target recovery strategy based on the current attenuation level and to perform performance recovery processing on the fuel cell according to the target recovery strategy.

[0110] Optionally, the determining module 200 is specifically used to: if the rated power attenuation range is in the first range, then the current attenuation level is the first level; if the rated power attenuation range is in the second range, then the current attenuation level is the second level, wherein the lower limit of the second range is greater than the upper limit of the first range.

[0111] Optionally, the current attenuation level is the first level. The recovery module 300 is specifically used to: perform performance recovery processing on the fuel cell based on a preset low-temperature humidification recovery strategy. The preset low-temperature humidification recovery strategy is as follows: based on a preset first hydrogen supply strategy, hydrogen is supplied to the anode of the fuel cell stack; based on a preset first voltage establishment strategy, oxygen is supplied to the cathode of the fuel cell stack; based on a current density point within a preset range, the fuel cell is subjected to load processing, and it is determined whether the current load processing time has reached the preset time; if the current load processing time has reached the preset time, based on a preset inlet temperature range and a preset temperature difference, the coolant inlet temperature of the fuel cell stack is reduced, and the load of the fuel cell stack is reduced to a preset idle point. Then, the fuel cell is loaded to the rated power point based on the preset load processing strategy.

[0112] Optionally, the current attenuation level is the second level. The recovery module 300 is specifically used to: perform performance recovery processing on the fuel cell based on a preset low-temperature humidification recovery strategy and / or a preset online potential cycling recovery strategy. The preset online potential cycling recovery strategy is as follows: based on a preset second hydrogen supply strategy, hydrogen is supplied to the anode of the fuel cell stack; based on a preset second voltage establishment strategy, oxygen is supplied to the cathode of the fuel cell stack; based on a preset oxygen-consuming discharge strategy, the fuel cell is subjected to multiple oxygen-consuming discharges to reduce the catalyst at a preset low voltage or to reduce the catalyst at a preset hydrogen pump effect, and the current open-circuit voltage is obtained; if the current open-circuit voltage is less than the preset voltage, a preset air immersion strategy is executed.

[0113] Optionally, after the fuel cell is subjected to performance recovery processing according to the target recovery strategy, the recovery module 300 is further configured to: calculate the post-recovery attenuation magnitude; if the post-recovery attenuation magnitude is less than a preset threshold, then determine to end the target recovery strategy.

[0114] Optionally, the rated power attenuation is:

[0115]

[0116] Where dPe is the rated power attenuation range, Pe is the rated power after attenuation, and Pe ref This is the reference rated power.

[0117] It should be noted that the foregoing explanation of the embodiment of the online reversible degradation performance recovery method for fuel cells also applies to the online reversible degradation performance recovery device for fuel cells in this embodiment, and will not be repeated here.

[0118] According to the fuel cell online reversible degradation performance recovery device proposed in this application embodiment, the rated power after degradation and the reference rated power are obtained, and the rated power degradation range is calculated based on the rated power after degradation and the reference rated power. The current degradation level is determined based on the rated power degradation range. A target recovery strategy is determined based on the current degradation level, and the fuel cell performance is restored according to the target recovery strategy. Therefore, by dynamically evaluating the rated power degradation range of the fuel cell, classifying degradation levels, and matching adaptive recovery strategies, the low recovery efficiency caused by hardware disassembly and assembly and poor applicability of a single strategy in related technologies is solved, thus improving the recovery efficiency of the fuel cell.

[0119] Figure 9 A schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device may include:

[0120] The memory 901, the processor 902, and the computer program stored on the memory 901 and capable of running on the processor 902.

[0121] When the processor 902 executes the program, it implements the online reversible degradation performance recovery method for fuel cells provided in the above embodiments.

[0122] Furthermore, electronic devices also include:

[0123] Communication interface 903 is used for communication between memory 901 and processor 902.

[0124] The memory 901 is used to store computer programs that can run on the processor 902.

[0125] The memory 901 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0126] If the memory 901, processor 902, and communication interface 903 are implemented independently, then the communication interface 903, memory 901, and processor 902 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 9 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0127] Optionally, in a specific implementation, if the memory 901, processor 902, and communication interface 903 are integrated on a single chip, then the memory 901, processor 902, and communication interface 903 can communicate with each other through an internal interface.

[0128] The processor 902 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0129] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the above-described method for restoring the online reversible degradation performance of a fuel cell.

[0130] This application also provides a computer program product, which stores a computer program that, when executed by a processor, implements the above-described method for restoring the online reversible degradation performance of a fuel cell.

[0131] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0132] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0133] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0134] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0135] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

Claims

1. A method for restoring the online reversible degradation performance of a fuel cell, characterized in that, Includes the following steps: Obtain the attenuated rated power and the reference rated power; The rated power attenuation range is calculated based on the attenuated rated power and the reference rated power, and the current attenuation level is determined based on the rated power attenuation range. A target recovery strategy is determined based on the current attenuation level, and the fuel cell is subjected to performance recovery processing according to the target recovery strategy.

2. The method according to claim 1, characterized in that, Determining the current attenuation level based on the rated power attenuation range includes: If the rated power attenuation range is within the first range, then the current attenuation level is the first level; If the rated power attenuation range is within the second range, then the current attenuation level is the second level, wherein the lower limit of the second range is greater than the upper limit of the first range.

3. The method according to claim 2, characterized in that, The current attenuation level is the first level. The step of determining a target recovery strategy based on the current attenuation level and performing performance recovery processing on the fuel cell according to the target recovery strategy includes: Based on a preset low-temperature humidification recovery strategy, the fuel cell undergoes performance recovery processing, wherein the preset low-temperature humidification recovery strategy is as follows: Based on a preset first hydrogen supply strategy, hydrogen is supplied to the anode of the fuel cell stack; Based on a preset first establishment voltage strategy, oxygen is supplied to the cathode of the fuel cell stack; Based on the current density points within a preset range, the fuel cell is subjected to a load-bearing process, and it is determined whether the current load-bearing time has reached the preset time. When the current load duration reaches the preset duration, based on the preset inlet temperature range and preset temperature difference, the coolant inlet temperature of the fuel cell stack is reduced, and the load of the fuel cell stack is reduced to the preset idle point. Then, based on the preset load strategy, the fuel cell is loaded to the rated power point.

4. The method according to claim 3, characterized in that, The current attenuation level is the second level. The step of determining a target recovery strategy based on the current attenuation level and performing performance recovery processing on the fuel cell according to the target recovery strategy includes: Based on the preset low-temperature humidification recovery strategy and / or the preset online potential cycling recovery strategy, the fuel cell undergoes performance recovery processing, wherein the preset online potential cycling recovery strategy is as follows: Based on a preset second hydrogen supply strategy, hydrogen is supplied to the anode of the fuel cell stack; Based on a preset second establishment voltage strategy, oxygen is provided to the cathode of the fuel cell stack; Based on a preset oxygen-consuming discharge strategy, the fuel cell is subjected to multiple oxygen-consuming discharges to reduce the catalyst with a preset low voltage or to reduce the catalyst with a preset hydrogen pump effect, and the current open-circuit voltage is obtained. If the current open-circuit voltage is less than the preset voltage, a preset air immersion strategy is executed.

5. The method according to claim 1, characterized in that, After performing performance recovery processing on the fuel cell according to the target recovery strategy, the process further includes: Calculate the attenuation magnitude after recovery; If the attenuation after recovery is less than a preset threshold, then the target recovery strategy is terminated.

6. The method according to any one of claims 1-5, characterized in that, The rated power attenuation range is: Where dPe is the rated power attenuation range, Pe is the rated power after attenuation, and Pe ref The reference rated power is [value].

7. A device for online reversible degradation performance recovery of a fuel cell, characterized in that, include: The acquisition module is used to acquire the attenuated rated power and the reference rated power; The determination module is used to calculate the rated power attenuation range based on the attenuated rated power and the reference rated power, and to determine the current attenuation level based on the rated power attenuation range. The recovery module is used to determine a target recovery strategy based on the current attenuation level, and to perform performance recovery processing on the fuel cell according to the target recovery strategy.

8. An electronic device, characterized in that, include: The method includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the online reversible degradation performance recovery method for fuel cells as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the online reversible degradation performance recovery method for fuel cells as described in any one of claims 1-6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the method for restoring the online reversible degradation performance of fuel cells as described in any one of claims 1-6.

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