A fuel cell system gas supply parameter dynamic intelligent adjustment method and adjustment system

Abstract

The application discloses a kind of fuel cell system gas supply parameter dynamic intelligent adjustment method and adjustment system, belong to fuel cell system control technical field.This method is in the process of rated power operation Real-time acquisition stack voltage, current, power and cathode or anode discharge data, with original current-voltage power curve comparison judgment performance attenuation;When detecting attenuation, first increase cathode measurement ratio 10%~50% try to repair, if power recovery then compare external power consumption to select optimal cathode measurement ratio;If cathode adjustment is invalid, then increase anode measurement ratio 10%~50% try to repair, if power recovery then select optimal anode measurement ratio;If cathode and anode adjustment are all invalid, then reduce power operation and issue maintenance alarm.The application can repair reversible performance attenuation on line by adjusting cathode and anode measurement ratio, ensure power output stability and realize system net output power optimal, effectively prolong the service life of stack.

Description

Technical Field

[0001] This invention relates to the field of fuel cell system control technology, specifically to a method, system, fuel cell system, and storage medium for dynamically and intelligently adjusting the cathode and anode gas supply metering ratio during rated power operation of a fuel cell system to repair reversible performance degradation online, ensure stable power output, and optimize the system's net output power. Background Technology

[0002] A proton exchange membrane fuel cell (PEMFC) is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. It has advantages such as high energy conversion efficiency, zero emissions, and low noise, and is widely used in transportation, stationary power generation, portable power sources and other fields.

[0003] During actual operation, the performance of a fuel cell stack gradually declines with increasing operating time. The main causes of this performance degradation include: dissolution and aggregation of the platinum catalyst, degradation of the proton exchange membrane, corrosion of the carbon support, decreased hydrophobicity of the gas diffusion layer, and flooding or membrane drying within the stack. Among these, localized oxygen / hydrogen deficiency due to insufficient reactant gas stoichiometry, and flooding or membrane drying caused by water management imbalances, are common and reversible degradation factors that cause voltage drops and unstable power output during rated power operation.

[0004] In existing technologies, the cathode and anode metering ratios of fuel cell systems are typically set to fixed values ​​based on rated operating conditions during the system design phase, or adjusted only through open-loop mapping based on the load current. This control method has the following drawbacks: First, a fixed metering ratio cannot adapt to changes in actual gas demand as the stack performance degrades over time. When the stack requires more reactant gas due to catalyst aging and increased mass transfer resistance, a fixed metering ratio can lead to insufficient gas supply, further exacerbating performance degradation. Second, when the stack experiences reversible degradation such as mild flooding or membrane drying, existing technologies cannot actively adjust the metering ratio for online repair. The purging process is often set at a fixed frequency and time, failing to proactively intervene based on the actual internal state of the stack, and affecting system availability and output stability. Third, existing technologies lack a comprehensive balance between adjusted external power consumption (such as air compressor power consumption and hydrogen circulation pump power consumption) and power recovery benefits, potentially leading to an excessive increase in the metering ratio to restore power, resulting in a decrease in the system's net output power.

[0005] Therefore, there is an urgent need for a control method and system that can monitor the performance status of the fuel cell stack in real time during the rated power operation of the fuel cell system, and repair reversible performance degradation online by dynamically and intelligently adjusting the cathode and anode metering ratio, while ensuring the optimal net output power of the system. Summary of the Invention

[0006] The main technical problem solved by this invention is how to dynamically adjust the cathode to anode metering ratio based on the actual performance degradation state of the fuel cell stack during the rated power operation of the fuel cell system, so as to restore performance, ensure stable power output, and at the same time take into account the net output efficiency of the system and extend the life of the fuel cell stack.

[0007] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: to provide a method for dynamic intelligent adjustment of gas supply parameters of a fuel cell system, applied to the process of a fuel cell system operating at rated power, comprising the following steps:

[0008] S1: Obtain the operating status data of the fuel cell system, wherein the operating status data includes at least electrical performance parameters;

[0009] S2: Based on the comparison between the operating status data and the preset benchmark, determine whether the fuel cell system has performance degradation;

[0010] S3: When performance degradation is detected, a tiered adjustment strategy is executed: First, the gas supply parameters of the cathode gas supply circuit are adjusted. If the electrical performance parameters recover to the expected range after adjustment, the current gas supply parameters are determined as operating parameters, and the adjustment ends. If the electrical performance parameters do not recover to the expected range after adjusting the cathode gas supply circuit, the gas supply parameters of the anode gas supply circuit are further adjusted.

[0011] S4: If the electrical performance parameters return to the expected range after adjusting the anode gas supply circuit, then the current gas supply parameters are determined as operating parameters, and the adjustment ends; if they still do not return to the expected range, then the protection strategy is executed.

[0012] The adjustment method establishes a tiered diagnosis and repair strategy: the first-level adjustment targets the most common causes of performance degradation, such as oxygen starvation or water flooding on the cathode side; the second-level adjustment addresses remaining issues that the first level cannot resolve, such as hydrogen deficiency or membrane dryness on the anode side. When both levels of adjustment are ineffective, the degradation is deemed irreversible and the system switches to protection mode. This tiered strategy allows the fuel cell stack to be corrected promptly when reversible degradation occurs, avoiding prolonged operation under conditions of insufficient gas or water management imbalance, thereby extending the stack's lifespan.

[0013] In a preferred embodiment of the present invention, the operating status data further includes drainage data, which is used to assist in determining the water management status inside the fuel cell stack. The drainage data includes at least one of cathode drainage data and anode drainage data.

[0014] In a preferred embodiment of the present invention, when the drainage volume data increases abnormally and is accompanied by a decrease in the electrical performance parameters, a flooding risk is identified, and the gas supply parameters of the cathode gas supply circuit are adjusted; when the drainage volume data decreases abnormally and is accompanied by a decrease in the electrical performance parameters, a membrane drying risk is identified, and the gas supply parameters of the anode gas supply circuit are adjusted. During flooding, the cathode side is adjusted first to enhance purging and drainage; during membrane drying, the anode side is adjusted first to enhance anode-side humidification.

[0015] In a preferred embodiment of the present invention, the gas supply parameter of the cathode gas supply circuit is the cathode metering ratio; the gas supply parameter of the anode gas supply circuit is the anode metering ratio.

[0016] In a preferred embodiment of the present invention, in order to balance the adjustment effect with system stability, the increase in the cathode metering ratio is 10% to 50%, and / or the increase in the anode metering ratio is 10% to 50%. The gas supply parameters are adjusted in a step-by-step manner: increasing in increments of 5% to 10%, maintaining operation for 10 to 120 seconds per step, until the electrical performance parameters recover or the cumulative increase reaches 50%.

[0017] In a preferred embodiment of the present invention, to avoid the problem of excessively increasing the metering ratio to restore power, leading to a surge in auxiliary power consumption and a decrease in system net efficiency, the optimal balance between performance recovery and system efficiency is achieved. Determining the current gas supply parameter as the operating parameter includes: acquiring the external power consumption corresponding to each candidate gas supply parameter after power recovery, wherein the external power consumption is the parasitic power consumption of at least one auxiliary machine among the air compressor, hydrogen circulation pump, and water pump; calculating the system net power corresponding to each candidate gas supply parameter, wherein the system net power is the fuel cell stack output power minus the external power consumption; and selecting the candidate gas supply parameter with the largest system net power as the operating parameter.

[0018] In a preferred embodiment of the present invention, the preset benchmark is a pre-stored original current-voltage-power curve. The determination of whether performance degradation exists includes: under the same current conditions, comparing the currently acquired voltage with the voltage at the corresponding current point in the original current-voltage-power curve, and calculating the voltage degradation; when the voltage degradation exceeds a first preset threshold, or the power degradation exceeds a second preset threshold, performance degradation is determined to exist. This judgment standard is intuitive and reliable; the original curve, as a benchmark, reflects the initial healthy state of the fuel cell stack, and the degree of deviation in voltage or power directly quantifies the degree of performance degradation.

[0019] In a preferred embodiment of the present invention, the implementation of the protection strategy includes: reducing the target operating power of the fuel cell stack to a power limit of 60% to 90% of the rated power, and issuing a maintenance alarm. Specifically, the maintenance alarm is used to prompt the inspection of the stack membrane electrode state and the flooding state of the flow field. This protection strategy retains some output capacity while ensuring system safety, avoiding the safety risks caused by sudden shutdown.

[0020] In a preferred embodiment of the present invention, after determining the operating parameters and ending the current adjustment, the method further includes: S5: running with the operating parameters, updating the preset benchmark based on the operating data, and returning to step S1 for repeated execution. This closed-loop mechanism enables the preset benchmark to adaptively adjust along with the aging process of the fuel cell stack, realizing dynamic intelligent control throughout the entire life cycle and avoiding judgment bias caused by model fixation.

[0021] To address the aforementioned technical problems, this invention also provides a dynamic intelligent adjustment system for fuel cell system gas supply parameters, comprising: a data acquisition module, a degradation judgment module, a graded adjustment module, a recovery judgment module, a parameter determination module, and a protection module. The system module architecture corresponds one-to-one with the steps of the aforementioned method, solidifying the method logic into an executable hardware and software system. Specifically, the parameter determination module includes a net power calculation unit, used to acquire the external power consumption corresponding to each candidate gas supply parameter, calculate the system net power, and select the candidate gas supply parameter with the highest system net power as the operating parameter.

[0022] The present invention also provides a fuel cell system including a processor and a memory, and a computer-readable storage medium, both storing a computer program that, when executed by the processor, implements the method described in any of the above embodiments.

[0023] The beneficial effects of this invention are: This invention monitors the performance degradation of the fuel cell stack in real time during rated power operation, and by increasing the gas supply parameters of the cathode gas supply circuit and the anode gas supply circuit in stages, it can repair the performance degradation caused by reversible factors such as insufficient gas supply, mild flooding or membrane drying online, without the need for shutdown maintenance, which significantly improves the availability and operational continuity of the system.

[0024] This invention adopts a hierarchical adjustment strategy that first adjusts the cathode gas supply circuit and then adjusts the anode gas supply circuit. The adjustment logic is clear and avoids coupling interference and difficulty in fault location caused by adjusting multiple circuits at the same time.

[0025] When both adjustments fail to restore performance, this invention determines that the degradation is irreversible and actively implements a protection strategy, avoiding further damage caused by the stack being forced to operate at full power in a severely degraded state, thus improving the safety and reliability of the system. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments 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, wherein:

[0027] Figure 1 This is a flowchart illustrating the method for dynamic intelligent adjustment of gas supply parameters in a fuel cell system according to the present invention.

[0028] Figure 2 This is a schematic diagram of the dynamic adjustment system of the present invention. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this invention, it should be noted that the terms "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] In this invention, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] Example 1: This example provides a method for dynamically and intelligently adjusting the gas supply parameters of a fuel cell system. This method is applied during the operation of the fuel cell system at rated power and can be executed by either the fuel cell controller or the vehicle controller. See also... Figure 1 The method includes the following steps:

[0036] S1: Obtain the operating status data of the fuel cell system.

[0037] The operating status data includes at least electrical performance parameters, specifically the stack voltage, current, and power. The voltage can be obtained through a single-cell voltage monitoring module, the current through a total current sensor, and the power is the product of the voltage and current or the measured value from a power sensor.

[0038] In a preferred embodiment, the operating status data further includes drainage volume data to assist in determining the water management status inside the fuel cell stack. The drainage volume data includes at least one of cathode drainage volume data and anode drainage volume data.

[0039] In this embodiment, cathode drainage data is preferred, but anode drainage data or a combination of both can also be used. The cathode drainage data may include at least one of drainage volume, drainage frequency, and drain valve opening duration, used to characterize the generation and discharge status of liquid water at the cathode. The above data is collected continuously or periodically during steady-state operation at rated power according to a preset sampling period.

[0040] It should be noted that when the drainage volume data increases abnormally and is accompanied by a decrease in the electrical performance parameters, it is determined to be a risk of flooding, and the cathode-side air supply parameters are adjusted first to enhance purging and drainage; when the drainage volume data decreases abnormally and is accompanied by a decrease in the electrical performance parameters, it is determined to be a risk of membrane drying, and the anode-side air supply parameters are adjusted first to enhance anode-side humidification. This auxiliary criterion can more accurately distinguish between the two types of reversible degradation, namely flooding and membrane drying, and guide the selection of subsequent adjustment directions.

[0041] S2: Based on the comparison between the running status data and the preset benchmark, determine whether there is performance degradation.

[0042] The preset benchmark is a pre-stored original current-voltage-power curve (benchmark model S21). This curve is a current-voltage and power correspondence curve recorded when the fuel cell stack is calibrated at rated power under initial healthy conditions. It serves as a performance comparison benchmark and can be stored in the controller's memory and updated as needed during subsequent operation.

[0043] The judgment method is as follows: Under the same current conditions, the currently collected voltage is compared with the voltage at the corresponding current point in the original current-voltage-power curve, and the voltage attenuation is calculated; when the voltage attenuation exceeds the first preset threshold, for example, the voltage drops by 5% to 10% at the same current point, or the power attenuation under the rated current exceeds the second preset threshold, it is determined that there is performance degradation.

[0044] Optionally, the discharge volume data can also be used for comprehensive judgment: when the cathode discharge volume data exceeds the preset discharge benchmark value, it indicates that the accumulation of liquid water in the cathode is intensified. When this is corroborated by voltage decay, it is determined that there is performance decay, so as to reduce the probability of false judgment.

[0045] If it is determined that there is no performance degradation, the current metering ratio is maintained and the system continues to operate. The process then returns to step S1 to re-collect operating status data and monitors the system cyclically.

[0046] S3: When performance degradation is detected, a tiered adjustment strategy is executed.

[0047] In this embodiment, the gas supply parameter of the cathode gas supply circuit is the cathode metering ratio; the gas supply parameter of the anode gas supply circuit is the anode metering ratio. That is, the cathode metering ratio is increased first to attempt repair, and if this is ineffective, the anode metering ratio is increased.

[0048] S31: Prioritize increasing the cathode metering ratio, i.e., increasing the air supply, to enhance the cathode's oxygen supply and ability to purge liquid water, thus repairing performance degradation caused by cathode flooding or oxygen starvation. The cathode metering ratio can be increased by 10% to 50%; a lower limit of 10% ensures that a single adjustment has an observable repair effect, while an upper limit of 50% avoids sudden increases in air supply that could cause compressor surge, fuel cell film drying, and excessive parasitic power consumption.

[0049] The adjustment adopts a step-by-step adjustment method: the ratio is increased in steps of 5% to 10%, and each step is maintained for 10 to 120 seconds to determine whether the electrical performance parameters have recovered to the expected range after increasing the cathode metering ratio.

[0050] S32: Determine if the power has been restored.

[0051] The recovery judgment criterion is as follows: when the absolute value of the difference between the actual output power and the rated power of the fuel cell system is within a preset power deviation range, for example, the deviation is less than or equal to 2% to 5%, and / or the deviation between the current voltage and the voltage corresponding to the original current-voltage power curve recovers to within a third preset threshold, the power is determined to be recovered. If recovered, proceed to step S33; otherwise, it is determined that the power has not been recovered, and proceed to step S4.

[0052] S33: Compare external power consumption and select the optimal metering ratio.

[0053] The specific method is as follows: After power recovery, obtain the external power consumption corresponding to each candidate gas supply parameter, where the external power consumption is the parasitic power consumption of at least one auxiliary machine among the air compressor, hydrogen circulation pump, and water pump; calculate the system net power corresponding to each candidate gas supply parameter, where the system net power is the stack output power minus the external power consumption; select the candidate gas supply parameter with the largest system net power as the operating parameter. Then proceed to step S34.

[0054] S34: End this adjustment and proceed to step S5.

[0055] S4: When increasing the cathode metering ratio alone cannot restore the power, further increase the anode metering ratio, i.e., increase the hydrogen supply, to repair the performance degradation caused by hydrogen deficiency at the anode, water blockage on the hydrogen side, or nitrogen accumulation.

[0056] S41: The anode metering ratio is also increased by 10% to 50%, using a step-by-step adjustment method with a step size of 5% to 10% per step and a maintenance time of 10 to 120 seconds per step, until the electrical performance parameters are restored or the cumulative increase reaches 50%.

[0057] S42: Determine whether the power has been restored. The determination criteria are the same as in step S32. If restored, proceed to step S43; if not restored, proceed to step S45.

[0058] S43: Compare external power consumption and select the optimal metering ratio.

[0059] Among the candidate combinations after the joint adjustment of the cathode and anode metering ratios, the optimal metering ratio combination is selected with the goal of maximizing the net power of the system, and this combination is used as the operating parameter. Then, the process proceeds to step S44.

[0060] S44: End this adjustment and proceed to step S5.

[0061] S45: Implement protection policies.

[0062] If adjusting the gas supply parameters at both the cathode and anode stages fails to restore power, the fuel cell stack is deemed to have experienced irreversible performance degradation (such as membrane electrode degradation, severe flooding of the flow field, or other hardware-level deterioration). In this case, a protection strategy is implemented: the target operating power of the fuel cell stack is reduced to 60% to 90% of its rated power, and a maintenance alarm is issued to check the condition of the membrane electrode assembly and the flooding status of the flow field, enabling timely maintenance and preventing further damage to the stack. Then, the process proceeds to step S5.

[0063] S5: Update the preset baseline and execute repeatedly.

[0064] After determining the operating parameters and ending the current adjustment, the system continues to operate at the optimal metering ratio and updates the preset benchmark based on the operating data (including updating the original current-voltage-power curve and the current metering ratio and drainage volume). The system then returns to step S1 and repeats the process to achieve dynamic intelligent adjustment throughout the entire life cycle.

[0065] The optimal metering ratio is selected as follows: within the metering ratio adjustment range for power recovery, each metering ratio level is traversed at intervals of 5% to 10%, the net output power of the system at each level is recorded, and the metering ratio corresponding to the maximum net output power is selected as the optimal metering ratio. This step ensures that, under the premise of performance recovery, the system operates in the state with the highest net output efficiency.

[0066] Example 2:

[0067] This embodiment provides a dynamic adjustment system for the gas supply parameters of a fuel cell system, such as... Figure 2 As shown, the method for performing Embodiment 1 includes:

[0068] The data acquisition module 101 is used to acquire the operating status data of the fuel cell system, the operating status data including at least electrical performance parameters; in a preferred embodiment, the operating status data also includes water displacement data, the water displacement data including at least one of cathode water displacement data and anode water displacement data;

[0069] The attenuation judgment module 201 is used to determine whether performance degradation exists based on a comparison between the operating status data and a preset benchmark. Specifically, under the same current conditions, the currently collected voltage is compared with the voltage at the corresponding current point in the pre-stored original current-voltage-power curve to calculate the voltage attenuation. When the voltage attenuation exceeds a first preset threshold, or the power attenuation under rated current exceeds a second preset threshold, performance degradation is determined to exist. Optionally, the attenuation judgment module may also combine drainage volume data for a comprehensive judgment.

[0070] The graded adjustment module 301 is used to execute a graded adjustment strategy when performance degradation is detected. The graded adjustment module is configured to: first adjust the cathode metering ratio of the cathode gas supply circuit; if the electrical performance parameters do not recover to the expected range after adjustment, then further adjust the anode metering ratio of the anode gas supply circuit. The adjustment range is 10% to 50%, using a step-by-step adjustment method: increasing in increments of 5% to 10%, maintaining each step for 10 to 120 seconds, until the electrical performance parameters recover or the cumulative increase reaches 50%.

[0071] The recovery judgment module 401 is used to determine whether the electrical performance parameters have recovered to the expected range. Specifically, when the absolute value of the difference between the actual output power and the rated power of the fuel cell system is within a preset power deviation range, and / or the deviation between the current voltage and the voltage corresponding to the original current-voltage-power curve recovers to within a third preset threshold, the power is determined to have recovered; otherwise, the power is determined not to have recovered.

[0072] The parameter determination module 501 is used to determine the operating parameters when the electrical performance parameters recover to the expected range. Specifically, the parameter determination module includes a net power calculation unit 502, which is used to: obtain the external power consumption corresponding to each candidate gas supply parameter, wherein the external power consumption is the parasitic power consumption of at least one auxiliary machine among the air compressor, hydrogen circulation pump, and water pump; calculate the system net power corresponding to each candidate gas supply parameter, wherein the system net power is the stack output power minus the external power consumption; and select the candidate gas supply parameter with the largest system net power as the operating parameter.

[0073] The protection module 601 is used to execute protection strategies when the electrical performance parameters have not recovered, including reducing the target operating power of the fuel cell stack to 60% to 90% of the rated power for power-limited operation and issuing a maintenance alarm.

[0074] The closed-loop update module 701 (as a preferred function) is used to run the system with the operating parameters after the operating parameters are determined, and to update the preset benchmark based on the operating data (including updating the original current-voltage-power curve, the current metering ratio and the drainage volume), triggering the data acquisition module to re-acquire the operating status data, thereby realizing dynamic intelligent adjustment throughout the entire life cycle.

[0075] The connection relationships and signal flow between the above modules are as follows: the output terminal of the data acquisition module 101 is connected to the input terminal of the attenuation judgment module 201; the output terminal of the attenuation judgment module 201 is connected to the control terminal of the graded adjustment module 301; the output terminal of the graded adjustment module 301 is connected to the input terminal of the recovery judgment module 401; one output terminal of the recovery judgment module 401 is connected to the input terminal of the parameter determination module 501, and the other output terminal of the recovery judgment module 401 is connected to the control terminal of the protection module 601; the output terminal of the parameter determination module 501 is connected to the input terminal of the closed-loop update module 701; the output terminal of the closed-loop update module 701 is fed back to the data acquisition module 101, forming a closed-loop control loop.

[0076] It should be noted that the system in this embodiment can be integrated into a fuel cell controller or a vehicle controller, and each module can be implemented through hardware circuits, software programs, or a combination thereof. When implemented through software, each module corresponds to a program module or functional unit executed by a processor.

[0077] Example 3: This example provides a fuel cell system, including a processor and a memory. The memory stores a computer program, and the processor executes the computer program to implement the method described in Example 1.

[0078] This embodiment also provides a vehicle incorporating the fuel cell system. The vehicle may be a fuel cell vehicle, a fuel cell forklift, or other fuel cell power equipment.

[0079] This embodiment also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method described in Embodiment 1.

[0080] The computer-readable storage medium may be a magnetic storage device (such as a hard disk or floppy disk), an optical storage device (such as an optical disc), a semiconductor storage device (such as a USB flash drive or SD card), or any other available medium.

[0081] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for dynamically and intelligently adjusting the gas supply parameters of a fuel cell system, characterized in that, The method includes: S1: When the fuel cell system is running at rated power, acquire the operating status data of the fuel cell system, the operating status data including at least electrical performance parameters; S2: Based on the comparison between the operating status data and the preset benchmark, determine whether the fuel cell system has performance degradation; S3: When performance degradation is detected, a tiered adjustment strategy is executed: First, adjust the gas supply parameters of the cathode gas supply circuit. If the electrical performance parameters return to the expected range after adjustment, then determine the current gas supply parameters as the operating parameters and end this adjustment. If the electrical performance parameters do not return to the expected range after adjusting the cathode gas supply circuit, then further adjust the gas supply parameters of the anode gas supply circuit; S4: If the electrical performance parameters return to the expected range after adjusting the anode gas supply circuit, then the current gas supply parameters are determined as operating parameters, and the adjustment ends; if they still do not return to the expected range, then the protection strategy is executed.

2. The adjustment method according to claim 1, characterized in that, The operating status data also includes drainage data, which is used to help determine the water management status inside the fuel cell stack; the drainage data includes at least one of cathode drainage data and anode drainage data.

3. The adjustment method according to claim 2, characterized in that, When the drainage volume data increases abnormally and is accompanied by a decrease in the electrical performance parameters, it is determined to be a risk of flooding, and the gas supply parameters of the cathode gas supply circuit are adjusted; when the drainage volume data decreases abnormally and is accompanied by a decrease in the electrical performance parameters, it is determined to be a risk of membrane drying, and the gas supply parameters of the anode gas supply circuit are adjusted.

4. The adjustment method according to claim 3, characterized in that, The gas supply parameters of the cathode gas supply circuit are the cathode metering ratio; the gas supply parameters of the anode gas supply circuit are the anode metering ratio.

5. The adjustment method according to claim 4, characterized in that, The increase in the cathode metering ratio is 10% to 50%, and / or the increase in the anode metering ratio is 10% to 50%; the gas supply parameters are adjusted in a step-by-step manner: increasing in steps of 5% to 10%, maintaining operation for 10 to 120 seconds per step, until the electrical performance parameters are restored or the cumulative increase reaches 50%.

6. The adjustment method according to claim 1, characterized in that, The process of determining the current gas supply parameters as operating parameters includes: After power recovery, the external power consumption corresponding to each candidate gas supply parameter is obtained. The external power consumption is the parasitic power consumption of at least one auxiliary machine among the air compressor, hydrogen circulation pump and water pump. Calculate the system net power corresponding to each candidate gas supply parameter, where the system net power is the stack output power minus the external power consumption; The candidate gas supply parameter with the highest net power of the system is selected as the operating parameter.

7. The adjustment method according to claim 1, characterized in that, The preset benchmark is a pre-stored original current-voltage-power curve; The determination of whether performance degradation exists includes: under the same current conditions, comparing the currently acquired voltage with the voltage at the corresponding current point in the original current-voltage power curve, and calculating the voltage degradation amount; When the voltage attenuation exceeds a first preset threshold, or the power attenuation exceeds a second preset threshold, performance degradation is determined to exist.

8. The adjustment method according to claim 1, characterized in that, The protection strategy includes: reducing the target operating power of the fuel cell stack to 60% to 90% of the rated power for limited power operation, and issuing a maintenance alarm.

9. The adjustment method according to claim 1, characterized in that, After determining the operating parameters and ending the current adjustment, step S5 is also included: running with the operating parameters, updating the preset benchmark based on the operating data, and returning to step S1 for repeated execution.

10. A dynamic intelligent adjustment system for gas supply parameters of a fuel cell system, characterized in that, include: The data acquisition module is used to acquire the operating status data of the fuel cell system, and the operating status data includes at least electrical performance parameters; The attenuation judgment module is used to determine whether there is performance degradation based on the comparison between the running status data and a preset benchmark; The graded adjustment module is used to first adjust the gas supply parameters of the cathode gas supply circuit when performance degradation is determined to exist. If the electrical performance parameters do not recover to the expected range after adjustment, the gas supply parameters of the anode gas supply circuit are further adjusted. The recovery judgment module is used to determine whether the electrical performance parameters have recovered to the expected range; The parameter determination module is used to determine the operating parameters when the electrical performance parameters recover to the expected range; A protection module is used to execute a protection strategy when the electrical performance parameters fail to recover.

11. The system according to claim 10, characterized in that, The parameter determination module includes a net power calculation unit, which is used to obtain the external power consumption corresponding to each candidate gas supply parameter, calculate the system net power, and select the candidate gas supply parameter with the largest system net power as the operating parameter.

12. A fuel cell system, characterized in that, It includes a processor and a memory, the memory storing a computer program, and the processor executing the computer program to implement the method as described in any one of claims 1 to 9.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method as described in any one of claims 1 to 9.

Images