Hydrogen injection system control method and device of fuel cell and nonvolatile storage medium

Abstract

The invention discloses a hydrogen injection system control method and device of a fuel cell and a nonvolatile storage medium. The method comprises the following steps: judging whether a hydrogen injection valve in a hydrogen injection system in the fuel cell is in an open state or not; under the condition that a hydrogen injection valve in the hydrogen injection system is in an open state, judging whether a tail exhaust valve in the fuel cell is opened or not; under the condition that the exhaust valve is opened, the start time and the duration corresponding to the adjustment operation are obtained; based on the starting time and the duration, the opening degree of a hydrogen spraying valve in the hydrogen spraying system is adjusted, and the hydrogen pressure change rate in the hydrogen spraying system is detected; and under the condition that the hydrogen pressure change rate meets the preset threshold value, the target opening degree corresponding to a hydrogen injection valve in the hydrogen injection system is determined. The technical problem that at present, only the hydrogen flow lost when the tail exhaust valve is opened is considered, and then the opening degree of the hydrogen spraying system is not accurately adjusted is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to a control method and device for a hydrogen injection system of a fuel cell and a non-volatile storage medium. Background Art

[0002] In a hydrogen fuel cell system, the hydrogen injection control strategy is crucial to the effect of the hydrogen side pressure when the tail valve is opened. The tail valve is mainly used to discharge unreacted hydrogen and other gases that may be generated in the fuel cell stack to maintain the gas balance of the system. The hydrogen injection control strategy determines the flow and pressure of hydrogen entering the fuel cell stack, which has a direct impact on the performance and stability of the fuel cell. The opening of the tail valve will cause unreacted hydrogen to be discharged from the fuel cell stack, thereby reducing the pressure on the hydrogen side.

[0003] At present, it is obviously inaccurate to determine the hydrogen flow rate lost when the tail exhaust valve is opened only based on the tail exhaust valve action delay. It is impossible to adjust the hydrogen feedforward compensation amount in real time according to the difference between the hydrogen pressure and the target pressure, which ultimately leads to poor hydrogen pressure control accuracy.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiments of the present invention provide a method, device and non-volatile storage medium for controlling a hydrogen injection system of a fuel cell, so as to at least solve the technical problem that the opening of the hydrogen injection system is not accurately adjusted by only considering the hydrogen flow rate lost when the tail exhaust valve is opened.

[0006] According to one aspect of an embodiment of the present invention, a method for controlling a hydrogen injection system of a fuel cell is provided, comprising: determining whether a hydrogen injection valve in a hydrogen injection system in a fuel cell is in an open state; when the hydrogen injection valve in the hydrogen injection system is in an open state, determining whether a tail exhaust valve in the fuel cell is open; when the tail exhaust valve is open, obtaining a start time and a duration corresponding to an adjustment operation; based on the start time and the duration, adjusting the opening of the hydrogen injection valve in the hydrogen injection system, and detecting a hydrogen pressure change rate in the hydrogen injection system; when the hydrogen pressure change rate meets a preset threshold, determining a target opening corresponding to the hydrogen injection valve in the hydrogen injection system.

[0007] Optionally, based on the start time and the duration, the opening of the hydrogen injection valve in the hydrogen injection system is adjusted, and the hydrogen pressure change rate in the hydrogen injection system is detected, including: starting from the start time, obtaining an initial adjustment value corresponding to the opening of the hydrogen injection valve in the hydrogen injection system; based on the initial adjustment value, determining the initial opening of the hydrogen injection valve and detecting the hydrogen pressure change rate in the hydrogen injection system; based on the hydrogen pressure change rate, adjusting the initial adjustment value, and detecting the hydrogen pressure change rate in the adjusted hydrogen injection system; repeating the above steps until the hydrogen pressure change rate meets the preset threshold, and determining the target adjustment value.

[0008] Optionally, obtaining an initial adjustment value corresponding to the opening of a hydrogen injection valve in the hydrogen injection system includes: randomly generating an initial adjustment value; or obtaining a target adjustment value obtained in a previous adjustment operation of the hydrogen injection system or the hydrogen injection valve in an open state as the initial adjustment value.

[0009] Optionally, based on the start time and the duration, the opening of the hydrogen injection valve in the hydrogen injection system is adjusted, and the hydrogen pressure change rate in the hydrogen injection system is detected, including: based on the start time, starting to set an initial adjustment value and an initial adjustment change rate for the opening of the hydrogen injection valve in the hydrogen injection system; based on the initial adjustment value and the initial adjustment change rate, determining the initial opening of the hydrogen injection valve and detecting the hydrogen pressure change rate in the hydrogen injection system; based on the hydrogen pressure change rate, adjusting the initial adjustment value and the initial adjustment change rate, and detecting the hydrogen pressure change rate in the hydrogen injection system after the adjustment; repeating the above steps until the hydrogen pressure change rate meets the preset threshold, and determining the target adjustment value and the target adjustment change rate.

[0010] Optionally, the duration is adjusted according to the hydrogen pressure change rate; when the hydrogen pressure change rate meets a preset threshold, the target duration is determined.

[0011] Optionally, determining whether the tail exhaust valve in the fuel cell is open also includes: when the tail exhaust valve is closed, obtaining the current hydrogen pressure in the hydrogen injection system; based on a preset target hydrogen pressure and the current hydrogen pressure, adjusting the opening of the hydrogen injection valve in the hydrogen injection system to obtain the target opening corresponding to the hydrogen injection valve in the hydrogen injection system.

[0012] According to another aspect of an embodiment of the present invention, a control device for a hydrogen injection system of a fuel cell is also provided, including: a first judgment module, used to judge whether a hydrogen injection valve in a hydrogen injection system in the fuel cell is in an open state; a second judgment module, used to judge whether a tail exhaust valve in the fuel cell is open when the hydrogen injection valve in the hydrogen injection system is in an open state; an acquisition module, used to obtain a start time and a duration corresponding to an adjustment operation when the tail exhaust valve is open; an adjustment module, used to adjust the opening of the hydrogen injection valve in the hydrogen injection system based on the start time and the duration, and detect the hydrogen pressure change rate in the hydrogen injection system; a determination module, used to determine a target opening corresponding to the hydrogen injection valve in the hydrogen injection system when the hydrogen pressure change rate meets a preset threshold.

[0013] According to another aspect of an embodiment of the present invention, a non-volatile storage medium is provided, the non-volatile storage medium including a stored program, wherein when the program is running, the device where the non-volatile storage medium is located is controlled to execute any one of the above-mentioned methods for controlling the hydrogen injection system of a fuel cell.

[0014] According to another aspect of an embodiment of the present invention, a computer device is provided. The computer device includes a processor, and the processor is used to run a program. When the program is run, any one of the above-mentioned methods for controlling a hydrogen injection system of a fuel cell is executed.

[0015] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, any one of the above-mentioned methods for controlling a hydrogen injection system of a fuel cell is implemented.

[0016] In an embodiment of the present invention, a control method for a hydrogen injection system of a fuel cell is adopted, by judging whether a hydrogen injection valve in a hydrogen injection system of the fuel cell is in an open state; when the hydrogen injection valve in the hydrogen injection system is in an open state, judging whether a tail valve in the fuel cell is open; when the tail valve is open, obtaining a start time and a duration corresponding to an adjustment operation; based on the start time and the duration, adjusting the opening of the hydrogen injection valve in the hydrogen injection system, and detecting the hydrogen pressure change rate in the hydrogen injection system; when the hydrogen pressure change rate meets a preset threshold, determining a target opening corresponding to the hydrogen injection valve in the hydrogen injection system, thereby achieving the purpose of adjusting the opening of the hydrogen injection valve while taking into account the hydrogen pressure change rate, thereby achieving a technical effect of improving the accuracy of adjusting the opening of the hydrogen injection valve of the hydrogen injection system, thereby solving the technical problem that the current opening of the hydrogen injection system is not accurately adjusted by only considering the hydrogen flow rate lost when the tail valve is opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A hardware structure block diagram of a computer terminal for implementing a method for controlling a hydrogen injection system of a fuel cell is shown;

[0019] Figure 2 is a flow chart of a method for controlling a hydrogen injection system of a fuel cell provided in accordance with an embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of hydrogen injection duty cycle intercept compensation of a hydrogen injection system control method for a fuel cell provided in an optional embodiment of the present invention;

[0021] Figure 4 It is a flow chart of a hydrogen injection control method with hydrogen injection duty cycle intercept compensation of a hydrogen injection system control method for a fuel cell provided in an optional embodiment of the present invention;

[0022] Figure 5 is a schematic diagram of the slope and intercept compensation of the hydrogen injection duty cycle of the hydrogen injection system control method of the fuel cell provided in an optional embodiment of the present invention;

[0023] Figure 6 It is a flow chart of a hydrogen injection control method for hydrogen injection duty cycle slope and intercept compensation of a hydrogen injection system control method for a fuel cell provided in an optional embodiment of the present invention;

[0024] Figure 7 It is a structural block diagram of a hydrogen injection system control device for a fuel cell provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] According to an embodiment of the present invention, a method embodiment of a method for controlling a hydrogen injection system of a fuel cell is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0028] The method embodiment provided in the first embodiment of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Figure 1 The hardware structure block diagram of a computer terminal for implementing a method for controlling a hydrogen injection system of a fuel cell is shown. Figure 1 As shown, the computer terminal 10 may include one or more (102a, 102b, ..., 102n are used to illustrate) processors (the processor may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 104 for storing data. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the BUS bus), a network interface, a power supply and / or a camera. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0029] It should be noted that the one or more processors and / or other data processing circuits described above may generally be referred to herein as "data processing circuits". The data processing circuits may be embodied in whole or in part as software, hardware, firmware, or any other combination thereof. In addition, the data processing circuit may be a single independent processing module, or may be incorporated in whole or in part into any of the other components in the computer terminal 10. As described in the embodiments of the present application, the data processing circuit acts as a processor control (e.g., selection of a variable resistor terminal path connected to an interface).

[0030] The memory 104 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the hydrogen injection system control method of the fuel cell in the embodiment of the present invention. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory 104, that is, the hydrogen injection system control method of the fuel cell of the above-mentioned application program is realized. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor, and these remote memories may be connected to the computer terminal 10 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0031] The display may be, for example, a touch screen liquid crystal display (LCD) that enables a user to interact with a user interface of the computer terminal 10 .

[0032] Figure 2 FIG. 1 is a flow chart of a method for controlling a hydrogen injection system of a fuel cell according to an embodiment of the present invention. Figure 2 As shown, the method comprises the following steps:

[0033] Step S202, determining whether the hydrogen injection valve in the hydrogen injection system of the fuel cell is in an open state.

[0034] In this step, the hydrogen injection system in the fuel cell is a key subsystem in the fuel cell vehicle or fuel cell power generation system. It is responsible for accurately controlling the supply of hydrogen to meet the reaction requirements of the fuel cell stack and ensure the safe and efficient operation of the system. The main function of the hydrogen injection system is to measure and adjust the flow of hydrogen to ensure that hydrogen enters the fuel cell stack at an appropriate rate and pressure. First determine whether the hydrogen injection valve is in the open state, because the valve opening needs to be adjusted only when the hydrogen injection valve is open.

[0035] Step S204, when the hydrogen injection valve in the hydrogen injection system is in an open state, determining whether the tail exhaust valve in the fuel cell is open.

[0036] In this step, when the hydrogen injection valve is in the open state, it is necessary to determine whether the tail valve in the fuel cell is open. The tail valve is responsible for discharging unreacted hydrogen and other byproducts in the fuel cell system to maintain the gas balance inside the fuel cell. However, the switching and adjustment of the tail valve can directly affect the hydrogen side pressure of the fuel cell stack. Therefore, different methods can be used to control the hydrogen injection system in the open and closed states of the tail valve to maintain the hydrogen pressure within a reasonable range.

[0037] Step S206, when the tail exhaust valve is open, obtaining the start time and duration of the adjustment operation.

[0038] In this step, when the tail valve is open, the start time and duration corresponding to the adjustment operation are obtained. The adjustment operation here refers to the compensation for the opening of the hydrogen injection valve in the hydrogen injection system. Because the hydrogen pressure in the hydrogen injection system will be affected when the tail valve is opened, the hydrogen injection valve needs to be compensated so that the hydrogen pressure can be maintained within a reasonable range. The state signal of the tail valve can be monitored, and once the instruction to open the tail valve is detected, the feedforward compensation algorithm is immediately started. Although the compensation start time can be predicted based on the preset model, the actual working conditions may change. Therefore, the start time may need to be fine-tuned according to the real-time monitored hydrogen pressure drop rate to ensure that the adjustment operation is started at the most appropriate time. The duration of the tail valve opening directly affects the degree of hydrogen pressure drop and the time required for recovery. The duration of the interference can be evaluated based on the operating state of the tail valve (such as the degree of opening, frequency and duration) and the current system working conditions. According to the calculated compensation requirements, the feedforward compensation algorithm determines an initial duration. This algorithm takes into account the time constant of hydrogen pressure recovery, the opening adjustment range and rate of the hydrogen injection valve, and the system's tolerance to pressure changes. After the adjustment operation begins, the control system will continuously monitor the recovery of the hydrogen side pressure. If the monitored pressure recovery rate does not meet expectations, the duration needs to be dynamically corrected to ensure that the hydrogen pressure is stable near the target value.

[0039] Step S208, based on the start time and the duration, adjusting the opening of the hydrogen injection valve in the hydrogen injection system, and detecting the hydrogen pressure change rate in the hydrogen injection system.

[0040] In this step, based on the start time, the opening of the hydrogen injection valve in the hydrogen injection system can be adjusted while monitoring the change in hydrogen pressure. The pattern of change in the opening of the hydrogen injection valve over time can be determined (such as linear growth, step change, or more complex dynamic adjustment). Then, according to the opening change pattern, the adjustment of the hydrogen injection valve is started at the start time until the duration ends. In this process, the control algorithm needs to consider the actual response capability of the hydrogen injection valve and the system's tolerance to pressure fluctuations. A pressure sensor can be used to monitor the pressure on the hydrogen side in real time to obtain real-time data on pressure changes. Based on the real-time pressure data obtained, the hydrogen pressure change rate (i.e., the change in pressure per unit time) is calculated. The rate of change is compared with the preset target value. If the actual rate of change deviates from the target value, the opening of the hydrogen injection valve or the duration of the feedforward control can be corrected to make the hydrogen pressure change rate close to the target value.

[0041] Through the above steps, the fuel cell system can effectively respond to pressure fluctuations and improve overall operating efficiency and safety by precisely controlling the opening of the hydrogen injection valve when the tail exhaust valve is opened, and dynamically monitoring and adjusting the hydrogen pressure change rate.

[0042] Step S210, when the hydrogen pressure change rate meets the preset threshold, determining the target opening corresponding to the hydrogen injection valve in the hydrogen injection system.

[0043] In this step, a reasonable hydrogen pressure change rate threshold can be set in advance according to the performance, safety requirements and operating efficiency of the fuel cell. The setting of this threshold should not only consider ensuring that the system can respond quickly to pressure changes, but also avoid hydrogen waste or other potential problems caused by excessive adjustment. If the monitored change rate meets the preset threshold, that is, it is in a stable or controllable state, this indicates that the current hydrogen supply and tail exhaust management strategy is basically correct. The opening of the hydrogen injection valve at this time can be determined as the target opening.

[0044] Through the above steps, the purpose of adjusting the opening of the hydrogen injection valve while taking into account the change rate of the hydrogen pressure can be achieved, thereby achieving the technical effect of improving the accuracy of adjusting the opening of the hydrogen injection valve of the hydrogen injection system, thereby solving the current technical problem of only considering the hydrogen flow rate lost when the tail exhaust valve is opened to adjust the opening of the hydrogen injection system without accuracy.

[0045] As an optional embodiment, based on the start time and the duration, the opening of the hydrogen injection valve in the hydrogen injection system is adjusted, and the hydrogen pressure change rate in the hydrogen injection system is detected, including: starting from the start time, obtaining the initial adjustment value corresponding to the opening of the hydrogen injection valve in the hydrogen injection system; based on the initial adjustment value, determining the initial opening of the hydrogen injection valve and detecting the hydrogen pressure change rate in the hydrogen injection system; based on the hydrogen pressure change rate, adjusting the initial adjustment value, and detecting the hydrogen pressure change rate in the adjusted hydrogen injection system; repeating the above steps until the hydrogen pressure change rate meets the preset threshold, and determining the target adjustment value.

[0046] Optionally, the process of adjusting the opening of the hydrogen injection valve in the hydrogen injection system based on the start time and the duration, and detecting the rate of change of the hydrogen pressure in the hydrogen injection system can be regarded as a dynamic, iterative control strategy, the purpose of which is to ensure that the hydrogen pressure can be quickly and stably restored to the preset target value under specific operating conditions (such as the tail valve opening). The initial adjustment value of the hydrogen injection valve opening can be calculated based on the preset start time and duration, combined with historical data and system model. This adjustment value should be sufficient to compensate for the drop in hydrogen pressure caused by the opening of the tail valve. Based on the calculated initial adjustment value, the initial opening of the hydrogen injection valve is determined. The selection of the initial opening needs to take into account the current hydrogen pressure state of the system, the operating load of the fuel cell and the response characteristics of the hydrogen injection valve. Use a pressure sensor to monitor the pressure on the hydrogen side in real time and calculate the hydrogen pressure change rate. This change rate reflects the dynamic response of the hydrogen pressure after the hydrogen injection valve opening is adjusted. The detected hydrogen pressure change rate is compared with the preset threshold to evaluate the effect of the current adjustment value. The preset threshold is set within an acceptable range to ensure the stability and safety of the hydrogen pressure. If the hydrogen pressure change rate does not reach the preset threshold, the control system will adjust the opening of the hydrogen injection valve according to the current change rate and the deviation from the target value. This adjustment can be adjusted through the feedforward compensation algorithm. The hydrogen injection duty cycle intercept compensation is a control strategy adopted in the fuel cell system to deal with nonlinear or uncertain factors in the hydrogen injection control. During the operation of the fuel cell, hydrogen injection control is an important link to maintain the stability of the hydrogen side pressure and ensure the performance and safety of the fuel cell. The duty cycle refers to the ratio of the opening time of the hydrogen injection valve to the total time in a control cycle, which directly determines the flow rate of hydrogen. When the tail valve is opened, the system needs to quickly replenish hydrogen to avoid a sharp drop in the pressure on the hydrogen side. At this time, the hydrogen injection duty cycle intercept compensation is introduced. The core idea is to add a feedforward control component on the basis of PID control (full name: Proportional-Integral-Derivative Control) to respond to known disturbances in the system in advance or immediately (such as the opening of the tail valve). Figure 3is a schematic diagram of hydrogen injection duty cycle intercept compensation according to a method for controlling a hydrogen injection system of a fuel cell provided in an optional embodiment of the present invention, such as Figure 3 As shown in the figure, when it is expected that the tail valve will open, an initial duty cycle compensation value will be calculated based on the preset model or historical data. This compensation value can be regarded as a fixed increase in the duty cycle of the hydrogen injection valve opening, that is, the intercept compensation C. This compensation value is determined based on the prediction of the magnitude of the drop in hydrogen pressure caused by the opening of the tail valve. After the tail valve is opened, the size of the hydrogen injection duty cycle intercept compensation will be dynamically adjusted according to the actual change in hydrogen pressure. If the rate or magnitude of the hydrogen pressure drop exceeds expectations, the control system will increase the duty cycle intercept compensation value; otherwise, it will reduce the compensation value. This dynamic adjustment ensures that the hydrogen side pressure can quickly and smoothly return to the target value. Continuously monitor the hydrogen pressure changes to verify whether the effect of the duty cycle intercept compensation meets the requirements. If the hydrogen pressure change rate is stable within the preset threshold, it means that the compensation strategy is effective; if the change rate deviates from the target value, it is necessary to continue to adjust the duty cycle intercept compensation value.

[0047] Through the above steps, the control system can accurately adjust the opening of the hydrogen injection valve under dynamic conditions, such as when the tail valve is open, to maintain the hydrogen pressure within the optimal range. This strategy not only improves the operating efficiency of the fuel cell system, but also ensures the safety and reliability of the system. Importantly, this process needs to be continuously optimized to adapt to different operating environments and changes in system status to ensure accurate control of hydrogen supply.

[0048] Figure 4 : is a flow chart of a hydrogen injection control method with hydrogen injection duty ratio intercept compensation according to a hydrogen injection system control method for a fuel cell provided in an optional embodiment of the present invention, such as Figure 4 As shown, including:

[0049] S401, determining whether the hydrogen injection is in operation;

[0050] S402, when hydrogen injection is turned on, the hydrogen injection pressure is PID-adjusted according to the hydrogen target pressure;

[0051] S403, determining whether the tail exhaust valve is open, if not, maintaining the hydrogen injection pressure PID adjustment;

[0052] S404, when the tail exhaust valve is opened, the start time and duration of the initial feedforward compensation are given, and the hydrogen injection duty cycle intercept C compensation when the initial tail exhaust is opened is given;

[0053] S405, preliminarily giving the start time and duration correction of the feedforward compensation, and giving the compensation correction of the hydrogen injection duty cycle intercept C when the tail exhaust is turned on;

[0054] S406, calculating the hydrogen pressure drop change rate, determining whether the change rate meets the requirement, if not, continuing to correct the start time and duration of the feedforward compensation, and continuing to correct the hydrogen injection duty cycle intercept C compensation when the tail exhaust is turned on;

[0055] S407, when the hydrogen pressure drop change rate meets the requirement, the start time and duration of the feedforward compensation are output, and the hydrogen injection duty cycle intercept C compensation when the tail exhaust is turned on is output;

[0056] S408, determining whether the tail exhaust valve is closed, and if it is not closed, continuing to output the start time and duration of the feedforward compensation, and continuing to output the hydrogen injection duty cycle intercept C compensation when the tail exhaust is opened;

[0057] S409, when the tail exhaust valve is closed, the hydrogen pressure PID regulation is restored;

[0058] S410: When the hydrogen injection is turned off, the cycle ends.

[0059] As an optional embodiment, obtaining an initial adjustment value corresponding to the opening of a hydrogen injection valve in a hydrogen injection system includes: randomly generating an initial adjustment value; or obtaining a target adjustment value obtained in a previous adjustment operation of the hydrogen injection system or the hydrogen injection valve in an open state as the initial adjustment value.

[0060] Optionally, obtaining the initial adjustment value corresponding to the opening of the hydrogen injection valve in the hydrogen injection system is a key step to ensure that the hydrogen supply can quickly adapt to changes in system demand. This process can be carried out through one of the following two strategies:

[0061] 1. Randomly generate initial adjustment values:

[0062] When the system is started or the operating conditions change significantly, due to the lack of sufficient historical data or information about the current state of the system, the initial adjustment value can be determined by random generation. This strategy is usually based on a preliminary understanding of the system behavior or a preset range, and the generated adjustment value must ensure that the hydrogen supply is within a safe and feasible range. For example, if the feedforward compensation is to respond to the drop in hydrogen pressure when the tail valve is opened, the randomly generated hydrogen injection opening adjustment value should take into account the impact of the hydrogen replenishment on the system stability, and avoid overly aggressive adjustments that may result in hydrogen waste or increase the system burden.

[0063] 2. Obtain the target adjustment value obtained in the previous adjustment operation when the hydrogen injection system or hydrogen injection valve is in the open state as the initial adjustment value:

[0064] When the system has accumulated enough historical data, it can use the successful control strategy in the previous operation as the starting point for the current operation. Specifically, the system can record the target adjustment value of the hydrogen injection duty cycle when the hydrogen injection valve was opened last time, as well as the impact of this adjustment value on the rate of change of hydrogen pressure. The next time a similar situation is encountered, the control system will use the previous target adjustment value as the initial adjustment value, which can significantly reduce the response time of the control strategy because the initial adjustment value is based on successful control experience under actual working conditions. This method relies on the system's data recording capabilities and the learning and use of historical data. By analyzing and memorizing historical control operations, the system can gradually optimize its control strategy and improve the accuracy and efficiency of hydrogen pressure control.

[0065] As an optional embodiment, based on the start time and the duration, the opening of the hydrogen injection valve in the hydrogen injection system is adjusted, and the hydrogen pressure change rate in the hydrogen injection system is detected, including: based on the start time, starting to set an initial adjustment value and an initial adjustment change rate for the opening of the hydrogen injection valve in the hydrogen injection system; based on the initial adjustment value and the initial adjustment change rate, determining the initial opening of the hydrogen injection valve and detecting the hydrogen pressure change rate in the hydrogen injection system; based on the hydrogen pressure change rate, adjusting the initial adjustment value and the initial adjustment change rate, and detecting the hydrogen pressure change rate in the hydrogen injection system after the adjustment; repeating the above steps until the hydrogen pressure change rate meets the preset threshold, and determining the target adjustment value and the target adjustment change rate.

[0066] Optionally, based on the start time, an initial adjustment value and an initial adjustment change rate are set for the opening of the hydrogen injection valve in the hydrogen injection system, and the adjustment strategy is optimized through an iterative process so that the hydrogen pressure change rate meets the preset threshold. According to the initial adjustment value and the initial adjustment change rate, the control system determines the initial opening of the hydrogen injection valve and starts to perform the adjustment operation. Subsequently, the pressure on the hydrogen side is monitored in real time by a pressure sensor, and the hydrogen pressure change rate is calculated, which is a key indicator for evaluating the effect of the control system. The pressure change rate directly reflects the balance between hydrogen supply and demand after the hydrogen injection valve opening is adjusted. According to the real-time detected hydrogen pressure change rate, the control system will decide whether it is necessary to adjust the opening of the hydrogen injection valve, as well as the amplitude and rate of adjustment. This adjustment can be quickly stabilized near the target value through a feedforward compensation algorithm. After the adjustment, the system needs to detect the hydrogen pressure change rate again to evaluate the control effect. Hydrogen injection duty cycle slope K and intercept C compensation is a strategy used in fuel cell hydrogen injection control to improve the accuracy and response speed of hydrogen supply, especially in the case of rapid system changes, such as the opening of the tail exhaust valve. This strategy combines the feedback regulation of PID control with the immediate response of feedforward control to compensate for expected changes in hydrogen pressure by dynamically adjusting the duty cycle of the hydrogen injection valve.

[0067] In hydrogen injection control, the duty cycle refers to the ratio of the opening and closing of the hydrogen injection valve within a certain period of time, which directly affects the flow rate of hydrogen. When the operating conditions of the fuel cell system change, such as the opening of the tail valve causing an instantaneous drop in hydrogen pressure, a feedforward compensation method of slope K and intercept C can be introduced. Intercept C compensation means that in hydrogen supply control, when it is expected that the system demand will change (such as the opening of the tail valve), the duty cycle of the hydrogen injection valve is immediately increased by a fixed amount C to respond to the demand change immediately and compensate for the loss of hydrogen flow. This increase C is calculated in advance or determined by experiment based on the characteristics of the system, and is intended to quickly replenish hydrogen and avoid a significant drop in hydrogen pressure. Slope K compensation provides a compensation amount that increases linearly with time in the control of the duty cycle changing with time, that is, the duty cycle of the hydrogen injection valve will not only increase by a fixed amount C immediately, but will also continue to increase at the rate of slope K over time. The setting of slope K takes into account the changing trend of hydrogen demand over time, which can more accurately match demand and reduce the fluctuation of hydrogen pressure. The selection of K value should be based on the understanding of system response characteristics and considerations of safety and efficiency. Figure 5 is a schematic diagram of the slope and intercept compensation of the hydrogen injection duty cycle of the hydrogen injection system control method of the fuel cell provided according to an optional embodiment of the present invention, such as Figure 5 As shown in the figure, by combining the feedforward compensation of slope K and intercept C, the control system can provide instant and dynamic hydrogen flow compensation, effectively cope with rapid changes in the fuel cell system, and improve the accuracy and stability of hydrogen pressure control. Specifically, when the tail valve is opened, the control system will immediately apply intercept C compensation, and then dynamically adjust the slope K according to the actual change of hydrogen pressure to more accurately control the opening of the hydrogen injection valve, ensuring that the hydrogen supply can quickly stabilize near the target value.

[0068] Figure 6 : is a flow chart of a hydrogen injection control method for hydrogen injection duty cycle slope and intercept compensation of a hydrogen injection system control method for a fuel cell according to an optional embodiment of the present invention, such as Figure 6 As shown, including:

[0069] S601, determining whether the hydrogen injection is in operation;

[0070] S602, when hydrogen injection is turned on, PID adjustment is performed on the hydrogen injection pressure according to the hydrogen target pressure;

[0071] S603, determining whether the tail exhaust valve is open, if not, maintaining the hydrogen injection pressure PID adjustment;

[0072] S604, when the tail exhaust valve is opened, the start time and duration of the initial feedforward compensation are given, and the slope K and intercept C compensation of the hydrogen injection duty cycle when the initial tail exhaust is opened are given;

[0073] S605. Preliminarily give the start time and duration correction of feedforward compensation, and give the hydrogen injection duty cycle slope K and intercept C compensation correction when the tail exhaust is turned on; S606. Calculate the hydrogen pressure drop change rate, and determine whether the change rate meets the requirements. If it does not meet the requirements, continue to correct the start time and duration of feedforward compensation, and continue to correct the hydrogen injection duty cycle slope K and intercept C compensation when the tail exhaust is turned on;

[0074] S607. When the hydrogen pressure drop change rate meets the requirement, the start time and duration of the feedforward compensation are output, and the hydrogen injection duty cycle slope K and intercept C compensation when the tail exhaust is turned on are output;

[0075] S608, determining whether the tail exhaust valve is closed, and if it is not closed, continuing to output the start time and duration of the feedforward compensation, and continuing to output the hydrogen injection duty cycle slope K and intercept C compensation when the tail exhaust is opened;

[0076] S609, when the tail exhaust valve is closed, the hydrogen pressure PID regulation is restored;

[0077] S610: When the hydrogen injection is turned off, the cycle ends.

[0078] As an optional embodiment, the duration is adjusted according to the hydrogen pressure change rate; when the hydrogen pressure change rate meets a preset threshold, the target duration is determined.

[0079] Optionally, the process of correcting the duration of the adjustment is a key link for the fuel cell hydrogen injection control system to optimize the hydrogen supply to adapt to rapid changes in the system (such as the opening of the tail valve). This process monitors the changes in hydrogen pressure in real time and dynamically adjusts the feedforward compensation parameters based on the changes to improve the accuracy and response speed of hydrogen pressure control. The pressure on the hydrogen side can be monitored in real time and the rate of change of hydrogen pressure can be calculated. The rate of change of hydrogen pressure reflects the instantaneous matching degree between hydrogen supply and demand and is the basis for adjusting the feedforward compensation parameters. Based on the current feedforward compensation start time and duration, evaluate whether the hydrogen pressure change meets the preset target range. If the hydrogen pressure change rate exceeds the preset threshold, it indicates that the current compensation strategy fails to effectively respond to demand changes. If the hydrogen pressure drops too quickly, the system may need to advance the start time of the feedforward compensation to inject additional hydrogen earlier and reduce the magnitude of the pressure drop. Conversely, if the hydrogen pressure drop is less than expected, the start time can be appropriately postponed to avoid excessive compensation of hydrogen. The duration correction is based on continuous monitoring of the hydrogen pressure change rate. If the hydrogen pressure is still not stable near the target value after compensation, the duration may need to be extended to increase the amount of hydrogen compensation. On the contrary, if the hydrogen pressure stabilizes quickly, the duration can be shortened, hydrogen can be saved and efficiency can be improved. After adjusting the start time and duration of the feedforward compensation, the system needs to monitor the changes in hydrogen pressure again to evaluate whether the revised compensation strategy is effective, that is, whether the hydrogen pressure change rate is close to or stable within the preset threshold. If the hydrogen pressure change rate still does not reach the target range, the above adjustment process will be repeated until the hydrogen pressure change rate stabilizes within the preset threshold. The start time and duration of the feedforward compensation at this time are the optimized target values. Once the effective start time and duration are determined, the system should record this set of parameters as a reference value for feedforward compensation under similar working conditions in the future. Through continuous recording and learning, the system can gradually optimize its control strategy and improve the accuracy and efficiency of hydrogen pressure control.

[0080] The entire correction process is a closed-loop control mechanism that dynamically adjusts the feedforward compensation parameters through real-time feedback of hydrogen pressure changes to achieve rapid response to changes in fuel cell system demand.

[0081] As an optional embodiment, determining whether the tail exhaust valve in the fuel cell is open also includes: when the tail exhaust valve is closed, obtaining the current hydrogen pressure in the hydrogen injection system; based on a preset target hydrogen pressure and the current hydrogen pressure, adjusting the opening of the hydrogen injection valve in the hydrogen injection system to obtain the target opening corresponding to the hydrogen injection valve in the hydrogen injection system.

[0082] Optionally, when the tail valve is closed, the current hydrogen pressure in the fuel cell system can be obtained. This measurement is performed by a pressure sensor installed on the hydrogen side to ensure that accurate hydrogen pressure data is obtained in real time, providing a basis for the subsequent adjustment of the hydrogen injection valve opening. The current hydrogen pressure can be compared with the preset target hydrogen pressure to evaluate whether the hydrogen supply meets the requirements of fuel cell operation. The target hydrogen pressure is determined based on the optimal operating state and efficiency of the fuel cell and should be adjusted regularly according to the system operating conditions. When there is a deviation between the current hydrogen pressure and the target hydrogen pressure, the system will adjust the opening of the hydrogen injection valve through the PID control algorithm based on this deviation. The purpose of this adjustment is to reduce the fluctuation of the hydrogen pressure and make it quickly stabilize near the target value to ensure the stable operation and optimal performance of the fuel cell. After adjustment, the system will determine a new hydrogen injection valve opening that should enable the hydrogen pressure to reach or maintain the target pressure level. The target opening needs to be optimized based on the real-time hydrogen pressure changes, the operating state of the fuel cell and external environmental factors to ensure an accurate match between hydrogen supply and demand.

[0083] During the entire process, the monitoring of the tail valve status provides the fuel cell system with real-time operating information, while the real-time measurement of hydrogen pressure provides accurate data support for the adjustment of the hydrogen injection valve opening. Combined with the PID control algorithm, the system can dynamically adjust the hydrogen injection valve opening to ensure that when the tail valve is closed, the hydrogen side pressure can be accurately controlled within the target range, thereby improving the operating efficiency and stability of the fuel cell.

[0084] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0085] Through the description of the above implementation, those skilled in the art can clearly understand that the control method of the hydrogen injection system of the fuel cell according to the above embodiment can be implemented by means of software plus the necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0086] According to an embodiment of the present invention, there is also provided a fuel cell hydrogen injection system control device for implementing the above fuel cell hydrogen injection system control method. Figure 7 FIG. 1 is a structural block diagram of a hydrogen injection system control device for a fuel cell according to an embodiment of the present invention. Figure 7 As shown, the control device for the hydrogen injection system of the fuel cell includes: a first judgment module 702, a second judgment module 704, an acquisition module 706, an adjustment module 708 and a determination module 710. The control device for the hydrogen injection system of the fuel cell is described below.

[0087] The first judgment module 702 is used to judge whether the hydrogen injection valve in the hydrogen injection system of the fuel cell is in an open state.

[0088] The second judgment module 704 is connected to the first judgment module 702 and is used to judge whether the tail exhaust valve in the fuel cell is open when the hydrogen injection valve in the hydrogen injection system is in an open state.

[0089] The acquisition module 706 is connected to the second judgment module 704 and is used to acquire the start time and duration of the adjustment operation when the tail exhaust valve is opened.

[0090] The adjustment module 708 is connected to the acquisition module 706 and is used to adjust the opening of the hydrogen injection valve in the hydrogen injection system based on the start time and the duration, and detect the hydrogen pressure change rate in the hydrogen injection system.

[0091] The determination module 710 is connected to the adjustment module 708 and is used to determine the target opening corresponding to the hydrogen injection valve in the hydrogen injection system when the hydrogen pressure change rate meets the preset threshold.

[0092] It should be noted that the first judgment module 702, the second judgment module 704, the acquisition module 706, the adjustment module 708 and the determination module 710 correspond to steps S202 to S210 in the embodiment, and the examples and application scenarios implemented by the multiple modules and the corresponding steps are the same, but are not limited to the contents disclosed in the above embodiment. It should be noted that the above modules, as part of the device, can be run in the computer terminal 10 provided in the embodiment.

[0093] An embodiment of the present invention may provide a computer device. Optionally, in this embodiment, the computer device may be located in at least one network device among multiple network devices of a computer network. The computer device includes a memory and a processor.

[0094] Among them, the memory can be used to store software programs and modules, such as the program instructions / modules corresponding to the hydrogen injection system control method and device of the fuel cell in the embodiment of the present invention. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory, that is, realizing the above-mentioned hydrogen injection system control method of the fuel cell. The memory may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory may further include a memory remotely arranged relative to the processor, and these remote memories can be connected to the computer terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0095] The processor can call the information and application programs stored in the memory through the transmission device to perform the following steps: determine whether the hydrogen injection valve in the hydrogen injection system of the fuel cell is in an open state; when the hydrogen injection valve in the hydrogen injection system is in an open state, determine whether the tail exhaust valve in the fuel cell is open; when the tail exhaust valve is open, obtain the start time and duration corresponding to the adjustment operation; based on the start time and duration, adjust the opening of the hydrogen injection valve in the hydrogen injection system, and detect the hydrogen pressure change rate in the hydrogen injection system; when the hydrogen pressure change rate meets the preset threshold, determine the target opening corresponding to the hydrogen injection valve in the hydrogen injection system.

[0096] Optionally, the processor may also execute the program code of the following steps: based on the start time and the duration, adjusting the opening of the hydrogen injection valve in the hydrogen injection system, and detecting the hydrogen pressure change rate in the hydrogen injection system, including: starting from the start time, obtaining an initial adjustment value corresponding to the opening of the hydrogen injection valve in the hydrogen injection system; based on the initial adjustment value, determining the initial opening of the hydrogen injection valve and detecting the hydrogen pressure change rate in the hydrogen injection system; based on the hydrogen pressure change rate, adjusting the initial adjustment value, and detecting the hydrogen pressure change rate in the adjusted hydrogen injection system; repeating the above steps until the hydrogen pressure change rate meets the preset threshold, and determining the target adjustment value.

[0097] Optionally, the processor may also execute program code of the following steps: obtaining an initial adjustment value corresponding to the opening of a hydrogen injection valve in the hydrogen injection system, including: randomly generating an initial adjustment value; or obtaining a target adjustment value obtained in a previous adjustment operation of the hydrogen injection system or the hydrogen injection valve in an open state as the initial adjustment value.

[0098] Optionally, the processor may also execute program code for the following steps: adjusting the opening of the hydrogen injection valve in the hydrogen injection system based on the start time and the duration, and detecting the hydrogen pressure change rate in the hydrogen injection system, including: starting to set an initial adjustment value and an initial adjustment change rate for the opening of the hydrogen injection valve in the hydrogen injection system based on the start time; determining the initial opening of the hydrogen injection valve and detecting the hydrogen pressure change rate in the hydrogen injection system based on the initial adjustment value and the initial adjustment change rate; adjusting the initial adjustment value and the initial adjustment change rate based on the hydrogen pressure change rate, and detecting the hydrogen pressure change rate in the adjusted hydrogen injection system; repeating the above steps until the hydrogen pressure change rate meets the preset threshold, and determining the target adjustment value and the target adjustment change rate.

[0099] Optionally, the processor may also execute program codes of the following steps: adjusting the duration according to the hydrogen pressure change rate; and determining the target duration when the hydrogen pressure change rate meets a preset threshold.

[0100] Optionally, the processor may also execute the program code of the following steps: determining whether the tail exhaust valve in the fuel cell is open, and also including: obtaining the current hydrogen pressure in the hydrogen injection system when the tail exhaust valve is closed; adjusting the opening of the hydrogen injection valve in the hydrogen injection system based on a preset target hydrogen pressure and the current hydrogen pressure, to obtain the target opening corresponding to the hydrogen injection valve in the hydrogen injection system.

[0101] By adopting the embodiment of the present invention, a method for controlling a hydrogen injection system of a fuel cell is provided, by judging whether a hydrogen injection valve in a hydrogen injection system of the fuel cell is in an open state; when the hydrogen injection valve in the hydrogen injection system is in an open state, judging whether a tail valve in the fuel cell is open; when the tail valve is open, obtaining a start time and a duration corresponding to an adjustment operation; based on the start time and the duration, adjusting the opening of the hydrogen injection valve in the hydrogen injection system, and detecting the hydrogen pressure change rate in the hydrogen injection system; when the hydrogen pressure change rate meets a preset threshold, determining a target opening corresponding to the hydrogen injection valve in the hydrogen injection system, thereby achieving the purpose of adjusting the opening of the hydrogen injection valve while taking into account the hydrogen pressure change rate, thereby achieving a technical effect of improving the accuracy of adjusting the opening of the hydrogen injection valve of the hydrogen injection system, thereby solving the technical problem that the current opening of the hydrogen injection system is not accurately adjusted by only considering the hydrogen flow rate lost when the tail valve is opened.

[0102] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing the hardware related to the terminal device through a program, and the program can be stored in a non-volatile storage medium, and the storage medium may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0103] The embodiment of the present invention further provides a non-volatile storage medium. Optionally, in this embodiment, the non-volatile storage medium can be used to store the program code executed by the control method of the hydrogen injection system of the fuel cell provided by the above embodiment.

[0104] Optionally, in this embodiment, the non-volatile storage medium may be located in any computer terminal in a computer terminal group in a computer network, or in any mobile terminal in a mobile terminal group.

[0105] Optionally, in this embodiment, the non-volatile storage medium is configured to store program codes for executing the following steps: determining whether a hydrogen injection valve in a hydrogen injection system in a fuel cell is in an open state; when the hydrogen injection valve in the hydrogen injection system is in an open state, determining whether a tail exhaust valve in the fuel cell is open; when the tail exhaust valve is open, obtaining a start time and a duration corresponding to the adjustment operation; based on the start time and the duration, adjusting the opening of the hydrogen injection valve in the hydrogen injection system, and detecting the hydrogen pressure change rate in the hydrogen injection system; when the hydrogen pressure change rate meets a preset threshold, determining a target opening corresponding to the hydrogen injection valve in the hydrogen injection system.

[0106] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for executing the following steps: based on the start time and the duration, adjusting the opening of the hydrogen injection valve in the hydrogen injection system, and detecting the hydrogen pressure change rate in the hydrogen injection system, including: starting from the start time, obtaining an initial adjustment value corresponding to the opening of the hydrogen injection valve in the hydrogen injection system; based on the initial adjustment value, determining the initial opening of the hydrogen injection valve and detecting the hydrogen pressure change rate in the hydrogen injection system; based on the hydrogen pressure change rate, adjusting the initial adjustment value, and detecting the hydrogen pressure change rate in the adjusted hydrogen injection system; repeating the above steps until the hydrogen pressure change rate meets the preset threshold, and determining the target adjustment value.

[0107] Optionally, in this embodiment, the non-volatile storage medium is configured to store program codes for executing the following steps: obtaining an initial adjustment value corresponding to the opening of a hydrogen injection valve in a hydrogen injection system, including: randomly generating an initial adjustment value; or obtaining a target adjustment value obtained in a previous adjustment operation of the hydrogen injection system or the hydrogen injection valve in an open state as the initial adjustment value.

[0108] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for executing the following steps: based on the start time and the duration, adjusting the opening of the hydrogen injection valve in the hydrogen injection system, and detecting the hydrogen pressure change rate in the hydrogen injection system, including: based on the start time, starting to set an initial adjustment value and an initial adjustment change rate for the opening of the hydrogen injection valve in the hydrogen injection system; based on the initial adjustment value and the initial adjustment change rate, determining the initial opening of the hydrogen injection valve and detecting the hydrogen pressure change rate in the hydrogen injection system; based on the hydrogen pressure change rate, adjusting the initial adjustment value and the initial adjustment change rate, and detecting the hydrogen pressure change rate in the adjusted hydrogen injection system; repeating the above steps until the hydrogen pressure change rate meets the preset threshold, and determining the target adjustment value and the target adjustment change rate.

[0109] Optionally, in this embodiment, the non-volatile storage medium is configured to store program codes for executing the following steps: adjusting the duration according to the hydrogen pressure change rate; and determining the target duration when the hydrogen pressure change rate meets a preset threshold.

[0110] Optionally, in this embodiment, the non-volatile storage medium is configured to store program codes for executing the following steps: determining whether the tail exhaust valve in the fuel cell is open, and also including: when the tail exhaust valve is closed, obtaining the current hydrogen pressure in the hydrogen injection system; based on a preset target hydrogen pressure and the current hydrogen pressure, adjusting the opening of the hydrogen injection valve in the hydrogen injection system to obtain the target opening corresponding to the hydrogen injection valve in the hydrogen injection system.

[0111] An embodiment of the present invention also provides a computer program product, including a computer program. Optionally, in this embodiment, when the computer program is executed by a processor, it can achieve: judging whether a hydrogen injection valve in a hydrogen injection system in a fuel cell is in an open state; when the hydrogen injection valve in the hydrogen injection system is in an open state, judging whether a tail exhaust valve in the fuel cell is open; when the tail exhaust valve is open, obtaining a start time and a duration corresponding to an adjustment operation; based on the start time and the duration, adjusting the opening of the hydrogen injection valve in the hydrogen injection system, and detecting the hydrogen pressure change rate in the hydrogen injection system; when the hydrogen pressure change rate meets a preset threshold, determining a target opening corresponding to the hydrogen injection valve in the hydrogen injection system.

[0112] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0113] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0114] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0115] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0116] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0117] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a non-volatile storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0118] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for controlling a hydrogen injection system of a fuel cell, characterized in that: include: Determine whether the hydrogen injection valve in the hydrogen injection system of the fuel cell is in an open state; When the hydrogen injection valve in the hydrogen injection system is in an open state, determining whether the tail exhaust valve in the fuel cell is open; When the tail exhaust valve is open, obtaining the start time and duration of the adjustment operation; Based on the start time and the duration, adjusting the opening of the hydrogen injection valve in the hydrogen injection system, and detecting the rate of change of the hydrogen pressure in the hydrogen injection system; When the hydrogen pressure change rate meets a preset threshold, a target opening corresponding to a hydrogen injection valve in the hydrogen injection system is determined.

2. The method according to claim 1, characterized in that: The adjusting the opening of the hydrogen injection valve in the hydrogen injection system based on the start time and the duration, and detecting the hydrogen pressure change rate in the hydrogen injection system, includes: Starting from the start time, obtaining an initial adjustment value corresponding to the opening of the hydrogen injection valve in the hydrogen injection system; Based on the initial adjustment value, determining the initial opening of the hydrogen injection valve and detecting the rate of change of hydrogen pressure in the hydrogen injection system; Based on the hydrogen pressure change rate, adjusting the initial adjustment value, and detecting the adjusted hydrogen pressure change rate in the hydrogen injection system; The above steps are repeated until the hydrogen pressure change rate meets the preset threshold value, and the target adjustment value is determined.

3. The method according to claim 2, characterized in that The obtaining of the initial adjustment value corresponding to the opening of the hydrogen injection valve in the hydrogen injection system includes: Randomly generating the initial adjustment value; Or, a target adjustment value obtained in a previous adjustment operation when the hydrogen injection system or the hydrogen injection valve is in an open state is obtained as the initial adjustment value.

4. The method according to claim 1, characterized in that: The adjusting the opening of the hydrogen injection valve in the hydrogen injection system based on the start time and the duration, and detecting the hydrogen pressure change rate in the hydrogen injection system, includes: Based on the start time, start setting an initial adjustment value and an initial adjustment change rate for the opening of the hydrogen injection valve in the hydrogen injection system; Based on the initial adjustment value and the initial adjustment change rate, determining the initial opening of the hydrogen injection valve and detecting the hydrogen pressure change rate in the hydrogen injection system; Based on the hydrogen pressure change rate, adjusting the initial adjustment value and the initial adjustment change rate, and detecting the adjusted hydrogen pressure change rate in the hydrogen injection system; The above steps are repeated until the hydrogen pressure change rate meets the preset threshold, and the target adjustment value and the target adjustment change rate are determined.

5. The method according to claim 1, characterized in that Also includes: adjusting the duration according to the hydrogen pressure change rate; When the hydrogen pressure change rate meets a preset threshold, the target duration is determined.

6. The method according to any one of claims 1 to 5, characterized in that: The determining whether the tail exhaust valve in the fuel cell is open also includes: When the tail exhaust valve is closed, obtaining the current hydrogen pressure in the hydrogen injection system; Based on the preset target hydrogen pressure and the current hydrogen pressure, the opening of the hydrogen injection valve in the hydrogen injection system is adjusted to obtain the target opening corresponding to the hydrogen injection valve in the hydrogen injection system.

7. A control device for a hydrogen injection system of a fuel cell, characterized in that: include: A first judgment module is used to judge whether a hydrogen injection valve in a hydrogen injection system in a fuel cell is in an open state; A second judgment module, used to judge whether the tail exhaust valve in the fuel cell is open when the hydrogen injection valve in the hydrogen injection system is in an open state; An acquisition module, used for acquiring a start time and a duration corresponding to an adjustment operation when the tail exhaust valve is opened; an adjustment module, configured to adjust the opening of a hydrogen injection valve in the hydrogen injection system based on the start time and the duration, and detect a rate of change of hydrogen pressure in the hydrogen injection system; The determination module is used to determine the target opening corresponding to the hydrogen injection valve in the hydrogen injection system when the hydrogen pressure change rate meets the preset threshold.

8. A non-volatile storage medium, characterized in that: The non-volatile storage medium includes a stored program, wherein when the program is executed, the device where the non-volatile storage medium is located is controlled to execute the method for controlling the hydrogen injection system of a fuel cell according to any one of claims 1 to 6.

9. A computer device, characterized in that: include: Memory and processor, The memory stores a computer program; The processor is used to execute the computer program stored in the memory, and when the computer program is running, the processor executes the method for controlling the hydrogen injection system of the fuel cell according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method for controlling the hydrogen injection system of a fuel cell according to any one of claims 1 to 6 is implemented.

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