Hydrogen fuel cell intelligent control method, fuel cell, power supply system, and storage medium

Abstract

The application provides a hydrogen fuel cell intelligent control method, a fuel cell, a power supply system and a storage medium, and the hydrogen fuel cell intelligent control method comprises the following steps: when the fuel cell is started, the hydrogen supply device and the oxygen supply device are simultaneously started to operate for a first preset time length; after the hydrogen supply device and the oxygen supply device are simultaneously started to operate for the first preset time length, when the voltage of the power output end of the fuel cell is greater than a first preset voltage value, the fuel cell starts the load state. The hydrogen fuel cell intelligent control method can improve the voltage fluctuation of the fuel cell during starting, and the fuel cell is prone to an under-voltage state.

Description

Technical Field

[0001] This invention relates to the technical field of fuel cell control, specifically to a smart control method for a hydrogen fuel cell, a fuel cell using the smart control method, a power supply system using the fuel cell, and a computer-readable storage medium using the smart control method. Background Technology

[0002] The working principle of a proton exchange membrane fuel cell (PEMFC) is that hydrogen and oxygen undergo a redox reaction under the catalysis of a catalyst, resulting in charge transfer and heat release. However, not all hydrogen enters the fuel cell and participates in the reaction; a large amount remains unreacted. To improve hydrogen utilization, a hydrogen recirculation mode is generally used. This involves the unreacted hydrogen being recirculated through an external pipeline to the hydrogen inlet and then back into the fuel cell. This not only improves hydrogen utilization but also utilizes the water carried by the recirculating hydrogen to humidify it. Currently, the hydrogen used in fuel cells contains small amounts of impurities. During hydrogen recirculation, these impurities accumulate in the fuel cell system because they cannot participate in the reaction, leading to a decrease in hydrogen concentration. Furthermore, some impurities can affect catalyst activity. Additionally, water generated in the cathode reaction can seep into the anode and accumulate. After a period of operation, excess water can hinder the contact between hydrogen and the reaction medium. To address this issue, existing technologies typically use a hydrogen vent valve in the hydrogen recirculation loop to intermittently pulse the recirculated hydrogen, preventing the accumulation of impurities and excess water that could degrade fuel cell performance.

[0003] However, during fuel cell startup, voltage fluctuations are significant, easily leading to undervoltage. These voltage fluctuations are related to the pulses emitted by the exhaust valve. If timed pulse emissions are used immediately upon startup, it can cause frequent pressure fluctuations within the fuel cell system, impacting the proton exchange membrane inside the fuel cell and reducing its lifespan.

[0004] One existing approach involves pre-setting a current-pressure curve table, querying the corresponding hydrogen pressure value based on the required current under actual operating conditions, and controlling the opening and closing of the hydrogen emission device in real time. However, this method does not solve the problem of large voltage fluctuations and a tendency to fall into undervoltage during fuel cell startup.

[0005] Therefore, a more optimized hydrogen control method for fuel cells needs to be considered. Summary of the Invention

[0006] The primary objective of this invention is to provide a smart control method for hydrogen fuel cells that can improve the situation where large voltage fluctuations and undervoltage conditions occur during fuel cell startup.

[0007] The second objective of this invention is to provide a fuel cell that can improve the situation where large voltage fluctuations easily lead to undervoltage during fuel cell startup.

[0008] A third objective of this invention is to provide a power supply system that can improve the situation where large voltage fluctuations and undervoltage conditions are common during fuel cell startup.

[0009] A fourth objective of this invention is to provide a computer-readable storage medium that can improve the situation where voltage fluctuations are large and the fuel cell is prone to undervoltage during startup.

[0010] To achieve the aforementioned first objective, the intelligent control method for hydrogen fuel cells provided by the present invention includes: when the fuel cell is turned on, simultaneously activating the hydrogen supply device and the oxygen supply device for a first preset duration; after activating the hydrogen supply device and the oxygen supply device for the first preset duration, when the voltage at the power output terminal of the fuel cell is greater than a first preset voltage value, the fuel cell is put into a load-bearing state.

[0011] As can be seen from the above scheme, the intelligent control method for hydrogen fuel cells of the present invention first activates the hydrogen supply device and the oxygen supply device simultaneously for a first preset time when the fuel cell is started, to purge the residual gas inside the fuel cell stack and ensure that the fuel cell reacts fully. Only when the voltage at the power output terminal of the fuel cell exceeds a first preset voltage value is the fuel cell put into load mode, thus improving the undervoltage state and voltage fluctuations caused by voltage sag during the moment of load operation.

[0012] In a further embodiment, after the fuel cell is put into a loaded state, the embodiment further includes: when the hydrogen supply device and the oxygen supply device are simultaneously turned on and run for a second preset time, controlling the hydrogen exhaust valve to perform pulsed emission at a preset frequency.

[0013] Therefore, it is evident that after the fuel cell is put into load operation, continuing to operate the hydrogen and oxygen supply devices for a second preset time before controlling the hydrogen exhaust valve to pulse and discharge at a preset frequency can significantly improve the voltage sag and voltage fluctuations during the instantaneous load operation, ensuring stable operation. Simultaneously, controlling the hydrogen exhaust valve to pulse and discharge at a preset frequency rationally controls the entry and exit of hydrogen in the fuel cell system, improving fuel cell efficiency.

[0014] A further proposed solution includes, before starting the fuel cell, confirming that the conditions for starting the fuel cell are met before starting the fuel cell.

[0015] Therefore, before starting a fuel cell, it is necessary to confirm that the conditions for starting the fuel cell are met before starting the fuel cell to ensure the safety of the fuel cell operation.

[0016] In a further proposed solution, when the conditions for starting the fuel cell are met, the steps for starting the fuel cell include: confirming that the power supply system connected to the fuel cell has passed its self-test and that the power supply voltage of the power supply system does not meet the load operating voltage.

[0017] Therefore, before starting the fuel cell, if the power supply system connected to the fuel cell is confirmed to have passed the self-test, the power supply system connected to the fuel cell is considered safe. If the power supply voltage of the power supply system does not meet the load operating voltage, it means that the fuel cell needs to be started to supply power.

[0018] In a further proposed solution, after the step of starting the fuel cell under load, the solution also includes: shutting down the fuel cell when it is confirmed that the conditions for shutting down the fuel cell are met.

[0019] Therefore, once the fuel cell is in the load-bearing state, the shutdown conditions of the fuel cell can be monitored, and the fuel cell can be shut down when the conditions for shutting down are met.

[0020] In a further proposal, the conditions for shutting down the fuel cell are confirmed to be met when the power supply system to which the fuel cell is connected does not require power from the fuel cell.

[0021] Therefore, if the power supply system connected to the fuel cell is confirmed to not require power from the fuel cell, the fuel cell can be shut down.

[0022] In a further proposed solution, after the step of starting the fuel cell under load, the solution also includes: when it is confirmed that the conditions for fault protection are met, a preset fault protection mechanism is entered.

[0023] Therefore, in order to ensure the safe operation of fuel cells, it is necessary to set fault protection conditions. When the conditions for fault protection are met, the preset fault protection mechanism is activated.

[0024] In a further scheme, the conditions for confirming that fault protection is required include: when the voltage at the power output terminal drops to a second preset voltage and remains there for a third preset duration, the conditions for confirming that fault protection is required are met; or when the voltage at the power output terminal is lower than the third preset voltage, the conditions for confirming that fault protection is required are met; wherein, the third preset voltage is lower than the second preset voltage.

[0025] Therefore, if the voltage at the power output terminal drops to the second preset voltage and remains there for a third preset time, or if the voltage at the power output terminal is lower than the third preset voltage, it indicates that the voltage at the power output terminal is too low, and there may be a fault inside the fuel cell stack. Therefore, fault protection is required.

[0026] In a further embodiment, before the step of the voltage at the power output terminal dropping to the second preset voltage and remaining there for a third preset duration, the embodiment further includes: when the voltage at the power output terminal drops to the second preset voltage, controlling the hydrogen exhaust valve to remain open for a fourth preset duration, and then performing pulsed emission at a preset frequency.

[0027] Therefore, it can be seen that the water generated by the external cathode reaction will penetrate into the anode and accumulate. After a period of operation, the excess water will hinder the contact between hydrogen and the reaction medium, leading to failure. When the voltage at the power output terminal drops to the second preset voltage, the first consideration is that the low voltage at the power output terminal is caused by water flooding of the fuel cell. The normally open vent valve can alleviate the water flooding and increase the voltage on the stack side. See if the water flooding can be alleviated and the voltage at the power output terminal can be restored.

[0028] In a further proposed solution, the conditions for meeting the requirement for fault protection are confirmed as follows: if the temperature of the fuel cell stack is detected to be greater than the stack temperature protection threshold, the conditions for meeting the requirement for fault protection are confirmed.

[0029] Therefore, if the temperature of the fuel cell stack exceeds the stack temperature protection threshold, it indicates a risk of overheating and necessitates the activation of the fault protection mechanism.

[0030] In a further embodiment, the conditions for meeting the fault protection requirement are confirmed as follows: if the current at the power output terminal is detected to be greater than the first preset current value, the conditions for meeting the fault protection requirement are confirmed as met; or if the load current of the power supply system connected to the fuel cell is greater than the second preset current value, the conditions for meeting the fault protection requirement are confirmed as met.

[0031] Therefore, when the current at the power output terminal exceeds the first preset current value, it indicates that the output current at the power output terminal is overloaded, requiring the fault protection mechanism to be activated. Simultaneously, when the load current of the power supply system connected to the fuel cell exceeds the second preset current value, it is considered that a load abnormality has occurred, indicating overload operation, thus requiring the fault protection mechanism to be activated as well.

[0032] In a further proposed solution, the steps for entering the preset fault protection mechanism include: after shutting down the fuel cell for a fifth preset time, detecting the fuel cell startup conditions.

[0033] Therefore, when the preset fault protection mechanism is entered, after the fuel cell is shut down for the fifth preset time, the detection of the fuel cell start-up conditions is initiated so that the fuel cell can restart power supply.

[0034] To achieve the second objective of the present invention, the present invention provides a fuel cell including a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, it implements the steps of the above-described intelligent control method for hydrogen fuel cells.

[0035] To achieve the third objective of this invention, the power supply system provided by this invention includes a lithium battery power supply module, a photovoltaic power supply module, a fuel cell, and a load power supply terminal. The power output terminals of the lithium battery power supply module, the photovoltaic power supply module, and the fuel cell are all electrically connected to the load power supply terminal, and the fuel cell uses the aforementioned fuel cell.

[0036] To achieve the fourth objective of the present invention, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a controller, implements the steps of the above-described intelligent control method for hydrogen fuel cells. Attached Figure Description

[0037] Figure 1 This is a schematic block diagram of an embodiment of the power supply system of the present invention.

[0038] Figure 2 This is a flowchart of an embodiment of the intelligent control method for hydrogen fuel cells of the present invention.

[0039] Figure 3 This is a flowchart of the step of entering the preset fault protection mechanism in an embodiment of the intelligent control method for hydrogen fuel cells of the present invention.

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0041] Power supply system example:

[0042] See Figure 1In this embodiment, the power supply system includes a lithium battery power supply module 1, a photovoltaic power supply module 2, a fuel cell 3, and a load power supply terminal 4. The power output terminals of the lithium battery power supply module 1, photovoltaic power supply module 2, and fuel cell 3 are all electrically connected to the load power supply terminal 4 via a bus relay K2. The fuel cell 3 is also connected to the bus via a fuel cell-side relay K1. The lithium battery power supply module 1, photovoltaic power supply module 2, and fuel cell 3 can all supply power to the load power supply terminal 4. The power supply system can monitor and comprehensively analyze changes in parameters such as voltage, current, and stack temperature of the lithium battery power supply module 1, photovoltaic power supply module 2, fuel cell 3, and load power supply terminal 4, and control the power supply operations of these modules accordingly. The fuel cell 3 includes a hydrogen supply device and an oxygen supply device. The hydrogen supply device provides hydrogen to the fuel cell stack and is a cyclic hydrogen supply device. The oxygen supply device provides oxygen to the fuel cell stack. In this embodiment, the hydrogen supply device includes a hydrogen inlet pipe 31, a hydrogen outlet pipe 32, a hydrogen inlet valve 33, and a hydrogen outlet valve 34. The hydrogen inlet valve 33 is installed on the hydrogen inlet pipe 31, and the hydrogen outlet valve 34 is installed on the hydrogen outlet pipe 32. The hydrogen inlet pipe 31 and the hydrogen outlet pipe 32 are cyclically connected. The oxygen supply device includes an air inlet pipe 35, an air outlet pipe 36, and a blower 37. The blower 37 is used to blow air into the air inlet pipe 35 and also to dissipate heat from the fuel cell stack.

[0043] Example of intelligent control method for hydrogen fuel cells:

[0044] The intelligent control method for hydrogen fuel cells of the present invention is an application program used in the fuel cells of the aforementioned power supply system to control the fuel cells.

[0045] like Figure 2As shown, the intelligent control method for hydrogen fuel cells of the present invention, when in operation, first executes step S1 to confirm that the fuel cell start-up conditions are met before starting the fuel cell. Before starting the fuel cell, it is necessary to confirm that the fuel cell start-up conditions are met. In this embodiment, the steps for confirming that the fuel cell start-up conditions are met include: confirming that the power supply system connected to the fuel cell has passed self-test and that the power supply voltage of the power supply system does not meet the load operating voltage. To ensure system safety, the power supply system needs to pass self-test before power can be supplied. When the power supply system starts running, firstly, the bus-side relay K2 is closed to start the system under load, and then the entire system performs a self-test, checking whether there are any abnormalities in parameters such as voltage, current, and stack temperature on the fuel cell side, photovoltaic side, lithium battery side, and load side, and whether sensor communication is normal. If any abnormality is found, the self-test fails and power supply is not started; if there are no abnormalities, the self-test is passed, and power supply operation can be performed. During power supply operation, the priority among the lithium battery power supply module, photovoltaic power supply module, and fuel cell is as follows: the photovoltaic power supply module provides continuous online power, followed by the lithium battery power supply module, and finally the fuel cell. That is, the next power supply module is activated only when the power supply of the current level cannot meet the system's power demand. This activation of the next power supply level can be confirmed by detecting voltage and current. In this embodiment, after a successful self-test, if the bus voltage is detected to be less than or equal to 23.5V for three consecutive seconds, it is considered that the power supply of the lithium battery power supply module and the photovoltaic power supply module cannot meet the system's power demand. In this case, the fuel cell needs to be activated to provide power.

[0046] When the fuel cell is powered on, step S2 is executed, simultaneously activating the hydrogen supply device and the oxygen supply device for a first preset duration. This first preset duration is pre-set based on experimental data; preferably, it is 15 seconds. To ensure a complete fuel cell reaction, the hydrogen supply device and the oxygen supply device are activated simultaneously for the first preset duration to purge any residual gas inside the fuel cell stack. In this embodiment, when the hydrogen supply device and the oxygen supply device are activated, the hydrogen inlet valve, the hydrogen exhaust valve, and the blower are also activated.

[0047] After the hydrogen and oxygen supply devices are simultaneously activated and operated for a first preset time, step S3 is executed to determine whether the voltage at the power output terminal of the fuel cell is greater than a first preset voltage value. The first preset voltage value is preset based on experimental data; in this embodiment, it is 21V. To mitigate undervoltage and voltage fluctuations caused by voltage dips during fuel cell operation under load, the voltage at the power output terminal of the fuel cell must be greater than the first preset voltage value.

[0048] If the voltage at the power output terminal of the fuel cell does not meet the requirement of being greater than the first preset voltage value, then step S3 continues to be executed for continuous detection. When the voltage at the power output terminal of the fuel cell is greater than the first preset voltage value, step S4 is executed, and the fuel cell is put into load mode. The fuel cell is put into load mode only when the voltage at the power output terminal of the fuel cell is greater than the first preset voltage value, ensuring voltage stability during the moment the fuel cell is under load. In this embodiment, when the fuel cell is put into load mode, the circuit between the fuel cell and the load power supply terminal 4 is connected by controlling the fuel cell-side relay K1.

[0049] After the fuel cell is put into load mode, step S5 is executed to determine whether the simultaneous operation of the hydrogen supply device and the oxygen supply device has reached the second preset duration. The second preset duration is preset based on experimental data; in this embodiment, the second preset duration is 30 seconds, and it includes the first preset duration. Since the simultaneous operation of the hydrogen supply device and the oxygen supply device purifies the internal structure of the fuel cell stack, it can significantly improve the voltage sag and voltage fluctuations during the moment the fuel cell is put into load mode, ensuring stable operation. Therefore, the simultaneous operation of the hydrogen supply device and the oxygen supply device continues for a period of time after the fuel cell is put into load mode.

[0050] If the simultaneous operation of the hydrogen and oxygen supply devices does not reach the second preset duration, step S5 continues for continuous monitoring. Once the simultaneous operation of the hydrogen and oxygen supply devices reaches the second preset duration, step S6 is executed, controlling the hydrogen exhaust valve to pulse-emit at a preset frequency. The preset frequency is pre-set based on experimental data; in this embodiment, the preset frequency is the operation of the hydrogen exhaust valve cyclically opening for 1 second and then closing for 5 seconds. To effectively control the entry and exit of hydrogen in the fuel cell system and improve fuel cell efficiency, the hydrogen exhaust valve needs to be controlled to pulse-emit at the preset frequency after the simultaneous operation of the hydrogen and oxygen supply devices reaches the second preset duration.

[0051] After controlling the hydrogen exhaust valve to pulse and emit hydrogen at a preset frequency, step S7 is executed to determine whether the conditions for shutting down the fuel cell are met. To avoid prolonged operation of the fuel cell and ensure its lifespan, the fuel cell needs to be shut down when the conditions for shutdown are met. In this embodiment, confirming that the conditions for shutting down the fuel cell are met includes: confirming that the power supply system connected to the fuel cell does not require power from the fuel cell. When the power supply module of the lithium battery and / or the photovoltaic power supply module in the power supply system can meet the load power requirements, it is confirmed that the power supply system connected to the fuel cell does not require power from the fuel cell. For example, if the current at the load power supply terminal is detected to be less than 2A (i.e., the system is running without heavy load), and the current of the photovoltaic power supply module is detected to be greater than 1.5A for 30 seconds (indicating good lighting conditions), and the bus voltage is greater than 23.8V (the lithium battery charge is sufficient), it is confirmed that the power supply system connected to the fuel cell does not require power from the fuel cell, and the fuel cell can be shut down.

[0052] If the conditions for shutting down the fuel cell are not met, proceed to step S6 to control the hydrogen input. If the conditions for shutting down the fuel cell are met, proceed to step S8 to shut down the fuel cell. When shutting down the fuel cell, disconnect the fuel cell-side relay K1 and control the hydrogen and oxygen supply devices to stop operating.

[0053] In addition, see Figure 3 After executing step S4, where the fuel cell is in load-bearing mode, step S21 is also executed to determine whether the conditions for fault protection are met. To ensure the safe operation of the fuel cell, fault protection conditions need to be set, which can be configured according to actual needs.

[0054] In this embodiment, the conditions for confirming the need for fault protection include: when the voltage at the power output terminal drops to a second preset voltage and remains there for a third preset duration, the conditions for fault protection are confirmed to be met; or when the voltage at the power output terminal is lower than the third preset voltage, the conditions for fault protection are confirmed to be met; wherein, the third preset voltage is less than the second preset voltage. The second preset voltage, the third preset voltage, and the third preset duration are preset based on experimental data. In this embodiment, the second preset voltage is 12V, the third preset voltage is 10V, and the third preset duration is 10 seconds. When the voltage at the power output terminal drops to the second preset voltage and remains there for the third preset duration, or when the voltage at the power output terminal is lower than the third preset voltage, it indicates that the voltage at the power output terminal is too low, and a fault may have occurred inside the fuel cell stack, thus requiring fault protection.

[0055] In this embodiment, before the step of the voltage at the power output terminal dropping to the second preset voltage and remaining there for the third preset duration, the method further includes: when the voltage at the power output terminal drops to the second preset voltage, controlling the hydrogen exhaust valve to remain open for the fourth preset duration, and then performing pulsed emission at a preset frequency. The fourth preset duration is preset based on experimental data; in this embodiment, the fourth preset duration is 3 seconds. Since water generated by the external cathode reaction can permeate into the anode and accumulate, excess water after a period of operation can hinder the contact between hydrogen and the reaction medium, leading to a malfunction. When the voltage at the power output terminal drops to the second preset voltage, firstly, it is considered that the low voltage at the power output terminal is due to flooding of the fuel cell. Opening the exhaust valve can alleviate the flooding and increase the voltage on the stack side. It is then checked whether the flooding can be alleviated and the voltage at the power output terminal can recover. If it cannot recover, then protection measures are activated.

[0056] In this embodiment, confirming that the condition requiring fault protection is met further includes: if the temperature of the fuel cell stack is detected to be greater than the stack temperature protection threshold, then the condition requiring fault protection is confirmed. The stack temperature protection threshold is preset based on experimental data; in this embodiment, the stack temperature protection threshold is 75°C. If the temperature of the fuel cell stack exceeds the stack temperature protection threshold, it indicates a risk of overheating, necessitating the activation of the fault protection mechanism.

[0057] In this embodiment, the conditions for confirming the need for fault protection further include: if the current at the power output terminal is detected to be greater than a first preset current value, the conditions for fault protection are confirmed to be met; or if the load current of the power supply system connected to the fuel cell is greater than a second preset current value, the conditions for fault protection are confirmed to be met. The first and second preset current values ​​are preset based on experimental data. In this embodiment, the first preset current value is 10A, and the second preset current value is 20A. When the current at the power output terminal is greater than the first preset current value, it indicates that the output current at the power output terminal is overloaded, requiring the fault protection mechanism to be activated. Simultaneously, when the load current of the power supply system connected to the fuel cell is greater than the second preset current value, it is considered that an abnormal load has occurred, indicating overload operation, and therefore, the fault protection mechanism needs to be activated.

[0058] After confirming that the conditions for fault protection are met, step S22 is executed to enter the preset fault protection mechanism. In this embodiment, the steps for entering the preset fault protection mechanism include: after shutting down the fuel cell for a fifth preset time, detecting the fuel cell start-up conditions. The fifth preset time is preset based on experimental data; in this embodiment, the fifth preset time is 20 seconds. After entering the preset fault protection mechanism, to confirm whether the fuel cell can restart power supply after being shut down, the detection of fuel cell start-up conditions is performed after the fifth preset time, so that the fuel cell can restart power supply.

[0059] As described above, the intelligent control method for hydrogen fuel cells of the present invention, upon startup of the fuel cell, simultaneously activates the hydrogen supply device and the oxygen supply device for a first preset time to purge residual gases inside the fuel cell stack, ensuring a complete fuel cell reaction. Only when the voltage at the fuel cell's power output terminal exceeds a first preset voltage value is the fuel cell put into load mode, mitigating the undervoltage state and voltage fluctuations caused by voltage sag during load operation. Simultaneously, after the fuel cell is put into load mode, the hydrogen supply device and the oxygen supply device continue to operate for a second preset time before the hydrogen exhaust valve is controlled to pulse-emit at a preset frequency. This significantly improves the voltage sag and voltage fluctuations during load operation, ensuring stable operation. Furthermore, controlling the hydrogen exhaust valve to pulse-emit at a preset frequency rationally controls the entry and exit of hydrogen in the fuel cell system, improving fuel cell efficiency.

[0060] Fuel cell example:

[0061] The fuel cell in this embodiment includes a controller, which executes the steps in the above-described embodiment of the intelligent control method for hydrogen fuel cells when executing a computer program.

[0062] For example, a computer program can be divided into one or more modules, one or more of which are stored in memory and executed by a controller to perform the present invention. One or more modules can be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of the computer program in a fuel cell.

[0063] Fuel cells may include, but are not limited to, controllers and memory. Those skilled in the art will understand that fuel cells may include more or fewer components, or combinations of certain components, or different components; for example, fuel cells may also include input / output devices, network access devices, buses, etc.

[0064] For example, the controller can be a Central Processing Unit (CPU), or other general-purpose controllers, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose controller can be a microcontroller or any conventional controller. The controller is the control center of the fuel cell, connecting all parts of the fuel cell through various interfaces and wiring.

[0065] The memory can be used to store computer programs and / or modules. The controller implements various functions of the fuel cell by running or executing the computer programs and / or modules stored in the memory, and by calling the data stored in the memory. For example, the memory may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (e.g., sound receiving function, sound-to-text function, etc.); the data storage area may store data created based on the use of the mobile phone (e.g., audio data, text data, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, RAM, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0066] Examples of computer-readable storage media:

[0067] If the fuel cell integrated module of the above embodiments is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above embodiments of the intelligent control method for hydrogen fuel cells can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a controller, it can implement the steps of the above embodiments of the intelligent control method for hydrogen fuel cells. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The storage medium can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content contained in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0068] It should be noted that the above are only preferred embodiments of the present invention, but the design concept of the invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept also fall within the protection scope of the present invention.

Claims

1. A method for intelligent control of a hydrogen fuel cell, characterized in that: include: When the fuel cell is turned on, the hydrogen supply device and the oxygen supply device are simultaneously turned on and run for a first preset time to purge the gas remaining inside the fuel cell stack. When the hydrogen supply device and the oxygen supply device are turned on, the hydrogen inlet valve and the hydrogen exhaust valve are turned on to work. After the hydrogen supply device and the oxygen supply device are started and operated for the first preset time, when the voltage at the power output terminal of the fuel cell is greater than the first preset voltage value, the fuel cell starts to operate under load. When the hydrogen supply device and oxygen supply device are turned on and run for a second preset time, the hydrogen exhaust valve is controlled to perform pulsed emission at a preset frequency, wherein the second preset time includes the first preset time. After the fuel cell is put into the load state, when the voltage at the power output terminal drops to the second preset voltage, the hydrogen exhaust valve is controlled to be open for a fourth preset time, and then pulsed emission is performed at the preset frequency.

2. The intelligent control method for hydrogen fuel cells according to claim 1, characterized in that: Before the fuel cell is powered on, the following also applies: The fuel cell is started when the conditions for starting up the fuel cell are met.

3. The intelligent control method for hydrogen fuel cells according to claim 2, characterized in that: When the fuel cell start-up conditions are confirmed to be met, the fuel cell start-up steps include: It was confirmed that the power supply system connected to the fuel cell passed the self-test and that the power supply voltage of the power supply system did not meet the load operating voltage.

4. The intelligent control method for hydrogen fuel cells according to any one of claims 1 to 3, characterized in that: After the step of activating the fuel cell under load, the following is also included: When it is confirmed that the conditions for shutting down the fuel cell are met, the fuel cell is shut down.

5. The intelligent control method for hydrogen fuel cells according to claim 4, characterized in that: Confirm that the conditions for shutting down the fuel cell are met include: If it is confirmed that the power supply system connected to the fuel cell does not require power from the fuel cell, then the condition for shutting down the fuel cell is met.

6. The intelligent control method for hydrogen fuel cells according to any one of claims 1 to 3, characterized in that: After the step of activating the fuel cell under load, the following is also included: When the conditions for fault protection are confirmed to be met, the preset fault protection mechanism is activated.

7. The intelligent control method for hydrogen fuel cells according to claim 6, characterized in that: The conditions for confirming the need for fault protection include: When the voltage at the power output terminal drops to the second preset voltage and remains there for a third preset duration, it is confirmed that the conditions for fault protection are met; or When the voltage at the power output terminal is lower than the third preset voltage, it is confirmed that the conditions for fault protection are met. The third preset voltage is less than the second preset voltage.

8. The intelligent control method for hydrogen fuel cells according to claim 6, characterized in that: The conditions for confirming the need for fault protection include: If the temperature of the fuel cell stack is detected to be higher than the stack temperature protection threshold, it is confirmed that the conditions for fault protection are met.

9. The intelligent control method for hydrogen fuel cells according to claim 6, characterized in that: The conditions for confirming the need for fault protection include: If the current detected at the power output terminal is greater than the first preset current value, it is confirmed that the conditions for fault protection are met; or When the load current of the power supply system to which the fuel cell is connected is greater than the second preset current value, it is confirmed that the conditions for fault protection are met.

10. The intelligent control method for hydrogen fuel cells according to claim 6, characterized in that: The steps to activate the preset fault protection mechanism include: After the fuel cell is shut down for the fifth preset time, the fuel cell start-up conditions are detected.

11. A fuel cell, comprising a processor and a memory, characterized in that: The memory stores a computer program, which, when executed by the processor, implements the steps of the intelligent control method for hydrogen fuel cells as described in any one of claims 1 to 10.

12. A power supply system, comprising a lithium battery power supply module, a photovoltaic power supply module, a fuel cell, and a load power supply terminal, wherein the power output terminals of the lithium battery power supply module, the photovoltaic power supply module, and the fuel cell are all electrically connected to the load power supply terminal, characterized in that: The fuel cell described herein is the fuel cell of claim 11.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the controller, it implements the steps of the intelligent control method for hydrogen fuel cells as described in any one of claims 1 to 10.

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