Adaptive Compensation Control Method and Related Equipment for Low-Temperature Start-up Pressure of Hydrogen Fuel Cells

Abstract

This invention discloses an adaptive compensation control method and related equipment for low-temperature start-up pressure of hydrogen fuel cells, relating to the field of fuel cell technology. The method includes: determining a calibration control quantity based on a preset MAP table when the ambient temperature is below a minimum temperature threshold and the dynamic deviation rate of the fuel cell current is less than or equal to the maximum allowable slope; determining a compensation control quantity when the valve body temperature stabilization time is less than a set time threshold; and calculating a gradual limiting current to control the proportional valve opening when the ambient temperature is below the minimum temperature threshold and the dynamic deviation rate of the fuel cell current is greater than the maximum allowable slope. Differentiated compensation logic is designed for the three different stages of the low-temperature start-up process to dynamically correct the output of the proportional valve control quantity, stabilize the hydrogen pressure during low-temperature start-up, solve the overshoot and delay bottlenecks of traditional control methods, significantly reduce pressure fluctuations, reduce overshoot, and improve the output stability of the fuel cell.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, and in particular to an adaptive compensation control method and related equipment for low-temperature start-up pressure of hydrogen fuel cells. Background Technology

[0002] Hydrogen fuel cells have significant advantages in terms of environmental friendliness and low-temperature adaptability (e.g., normal start-up at -30°C). However, fuel cell vehicles often experience mechanical damage to the internal membrane electrode assembly due to a sudden increase in hydrogen supply pressure during cold-region testing.

[0003] like Figure 1 As shown, in low-temperature environments (below -30°C), the fuel cell system is in the low-temperature start-up phase. The resistance of the hydrogen supply proportional valve coil decreases, causing the valve opening to exceed the calibrated range under the same control inputs (such as pulse width modulation (PWM) and voltage). This leads to uncontrolled hydrogen flow, which in turn causes failure of the membrane electrode assembly (MEA) and seals in the fuel cell stack. This is because excessive proportional valve opening during low-temperature start-up increases the inlet pressure, causing hydrogen pressure surges, or "overshoots." Even with PID control of these surges, pressure overshoot and delay still exist, increasing the risk of stack damage.

[0004] One study proposed using the average value of hydrogen pressure monitored by multiple pressure sensors as the compensation adjustment increment, which means first monitoring the pressure deviation through pressure sensors and then compensating. However, this method has a certain lag.

[0005] Other studies have proposed correcting the feedforward opening of the proportional valve based on coolant temperature. However, this is mainly based on the flow deviation caused by the density change of hydrogen at different temperatures and pressures, and the temperature is controlled using coolant temperature as a reference. The hydrogen supply proportional valve belongs to the hydrogen system and is in direct contact with the atmospheric environment. After contact, it will cool down rapidly. The temperature of the fuel cell cooling system is different from that of the hydrogen system in some scenarios. For example, when the vehicle is in a cold storage or other variable temperature scenario, the coolant cooling rate is usually slower than that of the hydrogen system because this is internal cooling of the battery. Therefore, it cannot solve the electromagnetic force deviation of the electromagnetic coil in the proportional valve body caused by the low ambient temperature. At the same time, the cooling rate and characteristics of the coolant are also different from those of the hydrogen supply proportional valve. That is, when the coolant temperature is different from the proportional valve body temperature, the electromagnetic force control deviation of the electromagnetic coil during low-temperature start-up cannot be accurately identified and compensated. Summary of the Invention

[0006] To address the aforementioned issues, this invention proposes an adaptive compensation control method and related equipment for low-temperature start-up pressure of hydrogen fuel cells. Differentiated compensation logic is designed for the three different stages of the low-temperature start-up process to dynamically correct the output of the proportional valve control quantity, stabilize the hydrogen pressure during low-temperature start-up, overcome the overshoot and delay bottlenecks of traditional control methods, significantly reduce pressure fluctuations, decrease overshoot, and improve the output stability of the fuel cell.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides an adaptive compensation control method for cryogenic start-up pressure of a hydrogen fuel cell, comprising:

[0009] The dynamic deviation rate of fuel cell current is determined based on the real-time hydrogen pressure and the target hydrogen pressure. When the ambient temperature is less than the minimum temperature threshold and the dynamic deviation rate of fuel cell current is less than or equal to the maximum allowable slope, the calibration control quantity is determined based on the fuel cell demand current and the preset MAP table.

[0010] When the valve body temperature stabilization time is less than the set time threshold, the compensation control quantity is determined according to the relationship between the ambient temperature and the proportional valve resistance. The sum of the calibration control quantity and the compensation control quantity is the proportional valve control quantity used to control the opening of the proportional valve. Otherwise, the calibration control quantity is used as the proportional valve control quantity.

[0011] When the ambient temperature is below the minimum temperature threshold and the dynamic deviation rate of the fuel cell current is greater than the maximum allowable slope, the slope limit of the fuel cell current is set in segments according to the dynamic deviation rate of the fuel cell current. Combined with the adjustment amount of the fuel cell current, the gradual limit current is calculated to control the opening degree of the proportional valve.

[0012] As an alternative implementation method, the process of determining the compensation control quantity based on the relationship between ambient temperature and proportional valve resistance includes:

[0013] When the ambient temperature T is less than the minimum temperature threshold Calculate the current resistance value. for: ;

[0014] Determine the compensation control amount for: ;

[0015] in, For calibration temperature The rated resistor value below; This is based on the temperature coefficient of resistance of the coil material; This is for calibration control.

[0016] As an optional implementation, the adaptive compensation control method for low-temperature start-up pressure of the hydrogen fuel cell further includes: when the ambient temperature T is less than the minimum temperature threshold... At that time, based on the ambient temperature T and the minimum temperature threshold The difference determines the compensation control quantity. , ,in, This is the initial scaling factor. This is the deviation coefficient.

[0017] As an alternative implementation, when the ambient temperature is not lower than the minimum temperature threshold, the compensation control quantity is 0.

[0018] As an alternative implementation, the gradual limiting current is: ;in, Let be the gradually decreasing limiting current at time t; For fuel cell current adjustment, the fuel cell demand current and the fuel cell real-time current are given. The difference; The slope of the fuel cell current change; It is the hyperbolic tangent function; It is a saturation function.

[0019] As an alternative implementation, the process of setting the fuel cell current slope limit in segments based on the fuel cell current dynamic deviation rate includes: based on the target hydrogen pressure. With real-time hydrogen pressure Determine the dynamic deviation rate of fuel cell current This is how it is divided into segments. include:

[0020] .

[0021] In a second aspect, the present invention provides a hydrogen fuel cell cryogenic start-up pressure adaptive compensation control system, comprising:

[0022] The calibration module is configured to determine the dynamic deviation rate of the fuel cell current based on the acquired real-time hydrogen pressure and the target hydrogen pressure. When the acquired ambient temperature is less than the minimum temperature threshold and the dynamic deviation rate of the fuel cell current is less than or equal to the maximum allowable slope, the calibration control quantity is determined based on the fuel cell demand current and the preset MAP table.

[0023] The first control module is configured to determine the compensation control quantity based on the relationship between the ambient temperature and the proportional valve resistance when the valve body temperature stabilization time is less than the set time threshold. The sum of the calibration control quantity and the compensation control quantity is used as the proportional valve control quantity to control the opening of the proportional valve. Otherwise, the calibration control quantity is used as the proportional valve control quantity.

[0024] The second control module is configured to set the fuel cell current slope limit in segments according to the fuel cell current dynamic deviation rate when the ambient temperature is lower than the minimum temperature threshold and the fuel cell current dynamic deviation rate is greater than the maximum allowable slope. Combined with the fuel cell current adjustment amount, it calculates the gradual limit current to control the opening degree of the proportional valve.

[0025] Thirdly, the present invention provides an electronic device including a memory and a processor, and computer instructions stored in the memory and running on the processor, wherein the computer instructions, when executed by the processor, perform the method described in the first aspect.

[0026] Fourthly, the present invention provides a computer-readable storage medium for storing computer instructions, which, when executed by a processor, perform the method described in the first aspect.

[0027] Fifthly, the present invention provides a computer program product, including a computer program that, when executed by a processor, implements the method described in the first aspect.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] This invention addresses the pressure surge problem caused by the deviation of the proportional valve resistance characteristics during the low-temperature start-up of hydrogen fuel cells. It proposes an adaptive compensation control method and related equipment for low-temperature start-up pressure in hydrogen fuel cells. For different stages of the low-temperature start-up process, a multi-modal adaptive compensation control method is designed based on three different stages: When the ambient temperature is below the minimum temperature threshold, the dynamic deviation rate of the fuel cell current is less than or equal to the maximum allowable slope, and the valve body temperature stabilization time is less than a set time threshold, firstly, a calibration control quantity is determined according to a preset MAP table, and then a compensation control quantity is determined according to the relationship between the ambient temperature and the proportional valve resistance to suppress pressure overshoot within a stable range; if the valve body temperature stabilization time is not less than the set time threshold, it is in the temperature equilibrium stage, and the calibration control quantity is used as the proportional valve control quantity to achieve high-precision steady-state control; finally, in the rapid load change stage, the current slope limit is dynamically set through the current dynamic deviation rate to ensure safe gradual current change and avoid surge risks. By designing differentiated compensation logic, the output of the proportional valve control quantity is dynamically corrected to stabilize the hydrogen pressure during low-temperature startup, achieving precise control of hydrogen pressure in low-temperature environments and overcoming the overshoot and delay bottlenecks of traditional PID control. This significantly reduces pressure fluctuations, decreases overshoot, improves the reliability of the fuel cell stack membrane electrode assembly and seals, solves the technical challenge of start-up pressure runaway in fuel cell systems at temperatures below -30°C, and enhances the output stability of the fuel cell.

[0030] Advantages of additional aspects of the invention 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 the invention. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0032] Figure 1 Schematic diagram of hydrogen supply and control for the proportional valve of a fuel cell system;

[0033] Figure 2 This is a flowchart of the adaptive compensation control method for low-temperature start-up pressure of hydrogen fuel cells provided in Embodiment 1 of the present invention;

[0034] Figure 3 This is a schematic diagram of the adaptive compensation control method for low-temperature start-up pressure of hydrogen fuel cells provided in Embodiment 1 of the present invention.

[0035] Figure 4 This is a schematic diagram of the structure of the hydrogen fuel cell low-temperature start-up pressure adaptive compensation control system provided in Embodiment 2 of the present invention. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0038] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. Furthermore, it should be understood that the terms “comprising” and “including”, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0039] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0040] Example 1

[0041] like Figure 2 The diagram shown is a flowchart of an adaptive compensation control method for cryogenic start-up pressure of a hydrogen fuel cell provided in this embodiment. The method may include the following steps:

[0042] The dynamic deviation rate of fuel cell current is determined based on the real-time hydrogen pressure and the target hydrogen pressure. When the ambient temperature is less than the minimum temperature threshold and the dynamic deviation rate of fuel cell current is less than or equal to the maximum allowable slope, the calibration control quantity is determined based on the fuel cell demand current and the preset MAP table.

[0043] When the valve body temperature stabilization time is less than the set time threshold, the compensation control quantity is determined according to the relationship between the ambient temperature and the proportional valve resistance. The sum of the calibration control quantity and the compensation control quantity is the proportional valve control quantity used to control the opening of the proportional valve. Otherwise, the calibration control quantity is used as the proportional valve control quantity.

[0044] When the ambient temperature is below the minimum temperature threshold and the dynamic deviation rate of the fuel cell current is greater than the maximum allowable slope, the slope limit of the fuel cell current is set in segments according to the dynamic deviation rate of the fuel cell current. Combined with the adjustment amount of the fuel cell current, the gradual limit current is calculated to control the opening degree of the proportional valve.

[0045] In this embodiment, a multimodal adaptive compensation control method is designed for different stages of the low-temperature start-up process. Specifically, when the ambient temperature is below the minimum temperature threshold, the dynamic deviation rate of the fuel cell current is less than or equal to the maximum allowable slope, and the valve body temperature stabilization time is less than the set time threshold, the calibration control quantity is first determined according to the preset MAP table, and then the compensation control quantity is determined according to the relationship between the ambient temperature and the proportional valve resistance to suppress pressure overshoot within the stable range. If the valve body temperature stabilization time is not less than the set time threshold, it is in the temperature equilibrium stage, and the calibration control quantity is used as the proportional valve control quantity to achieve high-precision steady-state control. Finally, in the rapid load change stage, the current slope limit is dynamically set through the current dynamic deviation rate to ensure the safety of the current gradual change and avoid the risk of impact. By designing differentiated compensation logic, the output of the proportional valve control quantity is dynamically corrected to stabilize the hydrogen pressure during low-temperature start-up, achieving precise control of hydrogen pressure in low-temperature environments and breaking through the overshoot and delay bottlenecks of traditional PID control. It significantly reduces pressure fluctuations, decreases overshoot, improves the reliability of the fuel cell stack membrane electrode and seals, solves the technical problem of start-up pressure runaway in fuel cell systems in low-temperature environments below -30°C, and improves the output stability of fuel cells.

[0046] The following is combined with Figure 2 and Figure 3 This embodiment provides a detailed description of an adaptive compensation control method for cryogenic start-up pressure of a hydrogen fuel cell, specifically including:

[0047] S1: Obtain the required current for the fuel cell Ambient temperature T and real-time hydrogen pressure, and based on the target hydrogen pressure and real-time hydrogen pressure Determine the dynamic deviation rate of fuel cell current.

[0048] S2: Compare the ambient temperature T with the set minimum temperature threshold. And compare the dynamic deviation rate of fuel cell current with the set maximum allowable slope. .

[0049] Among them, the dynamic deviation rate of fuel cell current in the controller is the dynamic boundary value of fuel cell current (similar to a safety warning value) corresponding to the dynamic change of battery power. Verify and calibrate the controller in the laboratory and record the results; the rate of current change during low-temperature start-up must not exceed [a certain value]. If the temperature exceeds the normal range, there will be a significant change in battery current and hydrogen pressure, which will be uncontrollable. Therefore, a defense control module is designed in the third stage to prevent the driver from violently stepping on the accelerator immediately after starting the engine in an extremely low temperature environment.

[0050] S3: Design a multi-temperature-domain calibration MAP module; when the ambient temperature T is less than the minimum temperature threshold. Furthermore, the dynamic deviation rate of the fuel cell current is less than or equal to the maximum allowable slope. At that time, the multi-temperature domain calibration MAP control method was adopted to determine the calibration control quantity. ;

[0051] Alternatively, when the ambient temperature T is greater than or equal to the minimum temperature threshold At that time, the multi-temperature domain calibration MAP control method was adopted to determine the calibration control quantity. .

[0052] The multi-temperature-domain calibration MAP control method includes:

[0053] (1) Simulate different ambient temperature gradients (such as -40℃ to 45℃) and hydrogen pressure conditions in a constant temperature chamber or environmental chamber to ensure that the proportional valve is in the target working environment.

[0054] (2) Using a flow meter and valve position sensor, the valve opening is adjusted according to the preset ambient temperature gradient, and the hydrogen flow rate is simulated when the hydrogen pressure at the inlet and outlet of the proportional valve is different. The hydrogen pressure, hydrogen flow rate, fuel cell output current, etc. under each valve opening are collected. Dynamic response characteristics, such as delay and overshoot, can also be collected.

[0055] (3) Using multinomial regression or neural network algorithms, a mapping table (MAP) of current-hydrogen pressure-valve opening-hydrogen flow-ambient temperature is established and embedded into the signal computer boundary limit data module of the control program application layer (such as maximum flow slope, opening dead zone, etc.). The calibration control quantity of the proportional valve is directly derived according to the fuel cell demand current.

[0056] S4: Obtain the valve body temperature of the proportional valve, determine the valve body temperature stabilization time, and compare the valve body temperature stabilization time with the set time threshold. .

[0057] S5: If the valve body temperature stabilization time is less than the time threshold Then, the first stage, i.e., the initial stage of low temperature and when the proportional valve resistance is in a deviated state, is adopted, and the compensation control quantity is calculated. .

[0058] The first stage employs a dynamic temperature compensation control algorithm, which, based on the relationship between the resistance and temperature of the proportional valve, corrects the control quantity of the proportional valve to suppress the overshoot of the hydrogen pressure within the set stable range.

[0059] Specifically, it includes:

[0060] (1) Obtain the ambient temperature T and the calibration control quantity .

[0061] (2) Based on the temperature coefficient of resistance of coil material Calculate the current resistance value ,in, For calibration temperature The initial or rated resistance value.

[0062] (3) Compensation control quantity ;

[0063] When the ambient temperature T is less than the minimum temperature threshold At that time, compensation control quantity for: ;

[0064] Alternatively, based on the ambient temperature T and the minimum temperature threshold Calculate the difference to compensate the control quantity ,Right now: ,in, This is the initial scaling factor. This is the deviation coefficient.

[0065] Among them, when the ambient temperature T is not less than the minimum temperature threshold At that time, compensation control quantity It is 0.

[0066] Therefore, the proportional valve control quantity is determined based on the sum of the calibrated control quantity and the compensation control quantity, and the proportional valve control quantity is corrected or compensated. Then, the proportional valve opening is driven by the proportional valve control quantity to control the hydrogen entering the fuel cell stack.

[0067] S6: If the valve body temperature stabilization time is greater than or equal to the time threshold. Then, the second-stage (i.e., temperature equilibrium stage) control method is adopted; in the second stage, the proportional valve generates heat during operation, and when the valve body temperature stabilizes, the time threshold is reached. When the proportional valve reaches a stable state, a multi-temperature-domain calibration (MAP) control method is employed. The calibrated control quantity obtained from this method is used as the proportional valve control quantity to achieve high-precision steady-state control. .

[0068] S7: When the ambient temperature T is less than the minimum temperature threshold Furthermore, the dynamic deviation rate of the fuel cell current is greater than the maximum allowable slope. At this point, the vehicle enters the third stage, namely the rapid load change stage. At this time, the vehicle faces a rapid load-bearing command requirement when starting at low temperatures, and the risk of overshoot is relatively high. This is equivalent to activating a defense control mechanism to limit large current changes, such as limiting the situation where the vehicle driver accelerates violently.

[0069] Therefore, the method in this embodiment adds a defense control module, which dynamically sets the limit on the slope of the fuel cell current by the dynamic deviation rate of the fuel cell current, ensuring the safety of the current gradual change, and further defending and controlling the dynamic loading rate to avoid the risk of impact.

[0070] Specifically, it includes:

[0071] (1) Obtain the real-time current of the fuel cell and the real-time hydrogen pressure at the fuel cell inlet. ;

[0072] (2) Based on the current demand of the fuel cell and fuel cell real-time current Calculate the fuel cell current adjustment amount ;

[0073] (3) Based on the target hydrogen pressure With real-time hydrogen pressure Fuel cell current dynamic deviation rate Determine the maximum permissible slope ;

[0074] Typically, the more drastic the load changes, the greater the deviation. Therefore, the dynamic deviation rate of the fuel cell current is used to formulate segmented standards. That is, setting the slope limit of the fuel cell current change in segments:

[0075] .

[0076] (4) Using the ramp function, calculate the gradual limiting current. This allows for gradual current changes and limits the current to control the valve opening.

[0077] ;

[0078] in, ; These are variable coefficients; This refers to the real-time current of the fuel cell. It is the hyperbolic tangent function; This is a saturation function used to limit the output within a calibrated safe range.

[0079] This embodiment proposes a multimodal adaptive compensation control method based on three different stages of the low-temperature start-up process. By designing differentiated compensation logic, the hydrogen pressure during low-temperature start-up is stabilized.

[0080] Example 2

[0081] Figure 4 This is a schematic diagram of a hydrogen fuel cell cryogenic start-up pressure adaptive compensation control system provided in an embodiment of this application. It can be implemented by software, hardware, or a combination of both. The system may include: a calibration module, a first control module, and a second control module.

[0082] The calibration module is configured to determine the dynamic deviation rate of the fuel cell current based on the acquired real-time hydrogen pressure and the target hydrogen pressure. When the acquired ambient temperature is less than the minimum temperature threshold and the dynamic deviation rate of the fuel cell current is less than or equal to the maximum allowable slope, the calibration control quantity is determined based on the fuel cell demand current and the preset MAP table.

[0083] The first control module is configured to determine the compensation control quantity based on the relationship between the ambient temperature and the proportional valve resistance when the valve body temperature stabilization time is less than the set time threshold. The sum of the calibration control quantity and the compensation control quantity is used as the proportional valve control quantity to control the opening of the proportional valve. Otherwise, the calibration control quantity is used as the proportional valve control quantity.

[0084] The second control module is configured to set the fuel cell current slope limit in segments according to the fuel cell current dynamic deviation rate when the ambient temperature is lower than the minimum temperature threshold and the fuel cell current dynamic deviation rate is greater than the maximum allowable slope. Combined with the fuel cell current adjustment amount, it calculates the gradual limit current to control the opening degree of the proportional valve.

[0085] It should be noted that the above modules correspond to the steps described in Embodiment 1, and the examples and application scenarios implemented by the above modules and the corresponding steps are the same, but are not limited to the content disclosed in Embodiment 1. It should also be noted that the above modules, as part of the system, can be executed in a computer system such as a set of computer-executable instructions.

[0086] In further embodiments, the following is also provided:

[0087] An electronic device includes a memory and a processor, as well as computer instructions stored in the memory and running on the processor, wherein the computer instructions, when executed by the processor, perform the method described in Embodiment 1. For brevity, further details are omitted here.

[0088] It should be understood that in this embodiment, the processor can be a central processing unit (CPU), or it can be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor, etc.

[0089] Memory may include read-only memory and random access memory, and provides instructions and data to the processor. A portion of memory may also include non-volatile random access memory. For example, memory may also store information about the device type.

[0090] A computer-readable storage medium for storing computer instructions, which, when executed by a processor, perform the method described in Embodiment 1.

[0091] The method in Example 1 can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor. The software modules can reside in readily available storage media in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, a detailed description is not provided here.

[0092] A computer program product includes a computer program that, when executed by a processor, implements the method described in Embodiment 1.

[0093] The present invention also provides at least one computer program product tangibly stored on a non-transitory computer-readable storage medium. The computer program product includes computer-executable instructions, such as instructions included in program modules, which execute in a device on a target real or virtual processor to perform the processes / methods described above. Typically, program modules include routines, programs, libraries, objects, classes, components, data structures, etc., that perform specific tasks or implement specific abstract data types. In various embodiments, the functionality of program modules can be combined or divided among program modules as needed. The machine-executable instructions for the program modules can execute within a local or distributed device. In a distributed device, the program modules can reside in both local and remote storage media.

[0094] The computer program code used to implement the methods of the present invention may be written in one or more programming languages. This computer program code may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the computer or other programmable data processing device, the program code causes the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may be executed entirely on a computer, partially on a computer, as a stand-alone software package, partially on a computer and partially on a remote computer, or entirely on a remote computer or server.

[0095] In the context of this invention, computer program code or related data may be carried by any suitable carrier to enable a device, apparatus, or processor to perform the various processes and operations described above. Examples of carriers include signals, computer-readable media, and the like. Examples of signals may include electrical, optical, radio, sound, or other forms of propagation signals, such as carrier waves, infrared signals, etc.

[0096] Those skilled in the art will recognize that the units and algorithm steps described in conjunction with the embodiments herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0097] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A method for adaptive compensation control of cryogenic start-up pressure in a hydrogen fuel cell, characterized in that, include: The dynamic deviation rate of fuel cell current is determined based on the real-time hydrogen pressure and the target hydrogen pressure. When the ambient temperature is less than the minimum temperature threshold and the dynamic deviation rate of fuel cell current is less than or equal to the maximum allowable slope, the calibration control quantity is determined based on the fuel cell demand current and the preset MAP table. When the valve body temperature stabilization time is less than the set time threshold, the compensation control quantity is determined according to the relationship between the ambient temperature and the proportional valve resistance. The sum of the calibration control quantity and the compensation control quantity is the proportional valve control quantity used to control the opening of the proportional valve. Otherwise, the calibration control quantity is used as the proportional valve control quantity. When the ambient temperature is below the minimum temperature threshold and the dynamic deviation rate of the fuel cell current is greater than the maximum allowable slope, the slope limit of the fuel cell current is set in segments according to the dynamic deviation rate of the fuel cell current. Combined with the adjustment amount of the fuel cell current, the gradual limit current is calculated to control the opening degree of the proportional valve. The process of determining the compensation control quantity based on the relationship between ambient temperature and proportional valve resistance includes: When the ambient temperature T is less than the minimum temperature threshold Calculate the current resistance value. for: ; Determine the compensation control amount for: ; in, For calibration temperature The rated resistor value below; This is based on the temperature coefficient of resistance of the coil material; For calibration control quantity; Alternatively, when the ambient temperature T is less than the minimum temperature threshold. At that time, based on the ambient temperature T and the minimum temperature threshold The difference determines the compensation control quantity. , ,in, This is the initial scaling factor. This is the deviation coefficient.

2. The adaptive compensation control method for cryogenic start-up pressure of a hydrogen fuel cell as described in claim 1, characterized in that, When the ambient temperature is not lower than the minimum temperature threshold, the compensation control quantity is 0.

3. The adaptive compensation control method for cryogenic start-up pressure of a hydrogen fuel cell as described in claim 1, characterized in that, The gradual limiting current is: ;in, Let be the gradually decreasing limiting current at time t; For fuel cell current adjustment, the fuel cell demand current and the fuel cell real-time current are given. The difference; The slope of the fuel cell current change; It is the hyperbolic tangent function; It is a saturation function.

4. The adaptive compensation control method for cryogenic start-up pressure of a hydrogen fuel cell as described in claim 3, characterized in that, The process of setting the fuel cell current slope limit in segments based on the fuel cell current dynamic deviation rate includes: based on the target hydrogen pressure. With real-time hydrogen pressure Determine the dynamic deviation rate of fuel cell current This is how it is divided into segments. include: 。 5. A hydrogen fuel cell cryogenic start-up pressure adaptive compensation control system, characterized in that, include: The calibration module is configured to determine the dynamic deviation rate of the fuel cell current based on the acquired real-time hydrogen pressure and the target hydrogen pressure. When the acquired ambient temperature is less than the minimum temperature threshold and the dynamic deviation rate of the fuel cell current is less than or equal to the maximum allowable slope, the calibration control quantity is determined based on the fuel cell demand current and the preset MAP table. The first control module is configured to determine the compensation control quantity based on the relationship between the ambient temperature and the proportional valve resistance when the valve body temperature stabilization time is less than the set time threshold. The sum of the calibration control quantity and the compensation control quantity is used as the proportional valve control quantity to control the opening of the proportional valve. Otherwise, the calibration control quantity is used as the proportional valve control quantity. The second control module is configured to set the fuel cell current slope limit in segments according to the fuel cell current dynamic deviation rate when the ambient temperature is lower than the minimum temperature threshold and the fuel cell current dynamic deviation rate is greater than the maximum allowable slope. Combined with the fuel cell current adjustment amount, the gradual limit current is calculated to control the opening degree of the proportional valve. The process of determining the compensation control quantity based on the relationship between ambient temperature and proportional valve resistance includes: When the ambient temperature T is less than the minimum temperature threshold Calculate the current resistance value. for: ; Determine the compensation control amount for: ; in, For calibration temperature The rated resistor value below; This is based on the temperature coefficient of resistance of the coil material; For calibration control quantity; Alternatively, when the ambient temperature T is less than the minimum temperature threshold. At that time, based on the ambient temperature T and the minimum temperature threshold The difference determines the compensation control quantity. , ,in, This is the initial scaling factor. This is the deviation coefficient.

6. An electronic device, characterized in that, It includes a memory and a processor, as well as computer instructions stored in the memory and running on the processor, which, when executed by the processor, perform the method according to any one of claims 1-4.

7. A computer-readable storage medium, characterized in that, Used to store computer instructions, which, when executed by a processor, perform the method described in any one of claims 1-4.

8. A computer program product, characterized in that, Includes a computer program, which, when executed by a processor, implements the method described in any one of claims 1-4.

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