Hydrogen-lithium coupled fuel cell power supply system control method and device and power supply system

Abstract

The invention relates to a hydrogen-lithium coupled fuel cell power supply system control method and device and a power supply system. The method comprises the following steps: acquiring the power output condition of the power supply system detected by a current system power output detection module, the pressure of a hydrogen storage container detected by an air pressure sensor and the voltage of a lithium battery detected by a lithium battery voltage detection module; under the condition that the pressure of the hydrogen storage container is smaller than or equal to the minimum pressure of the hydrogen storage container, a fuel cell system of the power supply system is determined to be closed, and a lithium battery of the power supply system is controlled to output current required power; under the condition that the pressure of the hydrogen storage container is greater than the minimum pressure of the hydrogen storage container, determining a control strategy of a power supply system according to the current required power output and the power output condition; and controlling the fuel cell system and the lithium battery of the power supply system to output the current required power. The problems that an existing hydrogen-lithium coupled fuel cell power supply system is low in hydrogen supply and power generation matching precision and slow in response are solved, and the endurance and safety of the unmanned aerial vehicle are improved.

Description

Technical Field

[0001] This application relates to the field of fuel cell control technology, and in particular to a control method, device and power supply system for a hydrogen-lithium coupled fuel cell power supply system. Background Technology

[0002] Taking drones as an example, the mainstream power systems for drones are lithium batteries and internal combustion engines: Lithium battery drones rely on electrochemical energy storage, which has a low energy density (usually ≤300Wh / kg), short flight time (mostly 30-60 minutes), poor low-temperature performance, and limited charge-discharge cycle life, making it difficult to meet the needs of long-endurance missions (such as surveying, inspection, and emergency communication). Although internal combustion engine drones have a longer flight time, they are noisy, have serious emissions pollution, and have high requirements for fuel (gasoline / diesel) storage and transportation safety, making them unsuitable for scenarios requiring environmental friendliness or low noise (such as urban operations and ecological monitoring).

[0003] Fuel cells, as a new type of power source, have advantages such as high energy density (hydrogen energy density can reach 33kWh / kg, and system-level energy density is usually 500Wh / kg-1500Wh / kg), zero emissions (only water is produced), low noise, and long endurance (supporting flight for several hours to tens of hours). They are considered an ideal power solution for long-endurance UAVs.

[0004] For fuel cell drones to become practical, key issues related to hydrogen management and system coordination control need to be addressed, which are also the underlying pain points that control systems need to tackle. I. The contradiction between safety and efficiency in hydrogen storage and supply systems Due to size and weight limitations, drones require hydrogen storage tanks to employ high-pressure gaseous hydrogen storage (e.g., 35MPa or 70MPa) or cryogenic liquid hydrogen storage. However, this presents several challenges: the hydrogen supply flow rate must match the real-time power demand of the fuel cell. Insufficient hydrogen supply leads to a sudden voltage drop and performance degradation in the fuel cell due to "fuel starvation." Excessive hydrogen supply results in the direct emission of unreacted hydrogen, wasting fuel and posing a safety hazard (hydrogen is highly flammable). Furthermore, the pressure in the hydrogen storage tank dynamically changes during the supply process (from full pressure to low pressure). Maintaining a stable hydrogen supply flow rate under pressure fluctuations is crucial for ensuring stable fuel cell output power.

[0005] II. The Dynamic Response Challenge of Fuel Cell Power Generation Drones exhibit complex flight attitudes (such as acceleration, climb, hovering, and dive), resulting in drastic fluctuations in power demand (e.g., lower power during hovering and a sudden increase in power during climb). However, fuel cells have a delayed power generation response (electrochemical reactions require time to reach a steady state). If the power generation status does not match the power demand, it can lead to insufficient drone power (e.g., insufficient power generation during climb) or energy waste (e.g., excessive power generation during hovering). Prolonged operation of fuel cells in a state of "under-supply" or "over-supply" hydrogen conditions accelerates the aging of the membrane electrode assembly (MEA) and shortens its lifespan.

[0006] Existing systems often employ simple "open-loop hydrogen supply" or "single-sensor feedback" (such as determining hydrogen supply solely based on fuel cell voltage). For instance, some systems maintain a fixed hydrogen supply flow rate according to preset flight phases (such as takeoff and cruise), failing to respond in real-time to changes in the instantaneous power demand of the drone, leading to a "mismatch" between hydrogen supply and power generation. The lack of comprehensive assessment of multiple parameters, such as hydrogen storage tank pressure, fuel cell temperature, and hydrogen purity, makes the system susceptible to shutdown or malfunction due to abnormalities in a single parameter (such as a sudden drop in hydrogen storage pressure).

[0007] Therefore, the current coordinated control accuracy for hydrogen supply and power generation in fuel cell control is low. Summary of the Invention

[0008] Therefore, it is necessary to provide a control method, device, and power supply system for a hydrogen-lithium coupled fuel cell power supply system that can improve the coordinated control accuracy of hydrogen supply and power generation in fuel cell control, in order to address the above-mentioned technical problems.

[0009] A control method for a hydrogen-lithium coupled fuel cell power supply system, the method comprising: The system acquires the power output of the power supply system detected by the current system power output detection module, the pressure of the hydrogen storage container detected by the gas pressure sensor, and the lithium battery voltage detected by the lithium battery voltage detection module. If the pressure in the hydrogen storage container is less than or equal to the minimum gas pressure in the hydrogen storage container, determine to shut down the fuel cell system of the power supply system and control the lithium battery of the power supply system to output the power currently required; When the pressure of the hydrogen storage container is greater than the minimum gas pressure of the hydrogen storage container, the control strategy of the power supply system is determined based on the current required power output and the power output situation. According to the control strategy of the power supply system, the fuel cell system and lithium battery of the power supply system are controlled to output the power currently required.

[0010] In one embodiment, when the pressure in the hydrogen storage container is greater than the minimum gas pressure of the hydrogen storage container, determining the control strategy of the power supply system based on the currently required power output and the power output situation includes: When the power output situation is that no power output is detected, the current required power output is zero, and the lithium battery charge is lower than the lithium battery charging charge, the control strategy of the power supply system is to control the output current of the fuel cell system to increase in a stepwise manner to the lithium battery charging power. When no power is detected and the required power is the start-up standby power, the control strategy of the power supply system is to control the output current of the fuel cell system to the start-up standby power. If the output power of the fuel cell system is insufficient for the start-up standby power, the lithium battery will make up the difference. When the power output is set to standby power and the current power requirement is standby power, the control strategy of the power supply system is to control the lithium battery output current to the standby power. When the power output is in standby mode and the current required power is for launch, the control strategy of the power supply system is to control the output current of the fuel cell system to rise in a stepwise manner to the rated power of the fuel cell, and to control the output power of the lithium battery to supplement the launch power. When the power output is for takeoff and the current power required is for cruise / hovering, the control strategy of the power supply system is as follows: control the fuel cell system to output cruise / hovering power, and if the output power of the fuel cell system is insufficient for cruise / hovering power, the lithium battery will make up the difference. When the power output is at the cruise / hover power level and the current required power is the acceleration power or the deceleration power level, the control strategy of the power supply system is to control the output current of the fuel cell system to rise in a stepwise manner to the rated power of the fuel cell, and to control the output power of the lithium battery to supplement the acceleration power or the deceleration power level.

[0011] In one embodiment, controlling the fuel cell system and lithium battery of the power supply system to output the currently required power according to the control strategy of the power supply system includes: The control strategy of the power supply system is as follows: when the output current of the fuel cell system is stepped up to the lithium battery charging power, the hydrogen solenoid valve and the fuel cell air cooling fan of the fuel cell system are opened, the output circuit of the fuel cell system is disconnected, the flow rate of the hydrogen solenoid valve is controlled to the fuel cell rated power hydrogen flow rate, and after the output current of the fuel cell system is stepped up to the lithium battery charging power, the flow rate of the hydrogen solenoid valve is controlled to drop to the fuel cell charging mode hydrogen flow rate.

[0012] In one embodiment, controlling the fuel cell system and lithium battery of the power supply system to output the currently required power according to the control strategy of the power supply system includes: The control strategy of the power supply system is as follows: control the output current of the fuel cell system to the start-up standby power. If the output power of the fuel cell system is insufficient for the start-up standby power, it is supplemented by the lithium battery. In this case, control the hydrogen solenoid valve and the fuel cell air-cooling fan of the fuel cell system to open. In the circuit path of the fuel cell system, control the flow rate of the hydrogen solenoid valve to the rated power hydrogen flow rate of the fuel cell. Control the output current of the fuel cell system to the start-up standby power. If the output power of the fuel cell system is insufficient for the start-up standby power, it is supplemented by the lithium battery. If the start-up standby power is greater than the current step increase of each level, control the output current of the fuel cell system to increase stepwise to the start-up standby power.

[0013] In one embodiment, controlling the fuel cell system and lithium battery of the power supply system to output the currently required power according to the control strategy of the power supply system includes: The control strategy of the power supply system is as follows: while controlling the output current of the fuel cell system to rise stepwise to the rated power of the fuel cell, and controlling the output power of the lithium battery to supplement the lift-off power, the hydrogen solenoid valve and the fuel cell air-cooling fan of the fuel cell system are kept open, the circuit of the fuel cell system is maintained, the flow rate of the hydrogen solenoid valve is controlled to the rated power hydrogen flow rate of the fuel cell, and the output current of the fuel cell system is controlled to rise stepwise to the rated power of the fuel cell. If the output power of the fuel cell system is insufficient to the rated power of the fuel cell, the lithium battery supplements the lift-off power. If the output power of the fuel cell system reaches the rated power of the fuel cell, the lithium battery supplements the lift-off power.

[0014] In one embodiment, controlling the fuel cell system and lithium battery of the power supply system to output the currently required power according to the control strategy of the power supply system includes: The control strategy of the power supply system is as follows: control the output of the fuel cell system to cruise / hover power. If the output power of the fuel cell system is insufficient for cruise / hover power, it is supplemented by the lithium battery. Keep the hydrogen solenoid valve and the fuel cell air-cooling fan of the fuel cell system open. Keep the circuit of the fuel cell system open. Control the flow rate of the hydrogen solenoid valve to the rated power hydrogen flow rate of the fuel cell. Control the output current of the fuel cell system to decrease to the cruise / hover power. If the output power of the fuel cell system is insufficient for cruise / hover power, it is supplemented by the lithium battery.

[0015] In one embodiment, controlling the fuel cell system and lithium battery of the power supply system to output the currently required power according to the control strategy of the power supply system includes: The control strategy of the power supply system is as follows: while controlling the output current of the fuel cell system to rise stepwise to the rated power of the fuel cell, and controlling the output power of the lithium battery to supplement the acceleration power or reduction power, the hydrogen solenoid valve and the fuel cell air-cooling fan of the fuel cell system are kept open, the circuit of the fuel cell system is maintained, the flow rate of the hydrogen solenoid valve is controlled to the rated power hydrogen flow rate of the fuel cell, and the output current of the fuel cell system is controlled to rise stepwise to the rated power of the fuel cell. If the output power of the fuel cell system is insufficient to the rated power of the fuel cell, the lithium battery supplements the acceleration power or reduction power. If the output power of the fuel cell system reaches the rated power of the fuel cell, the lithium battery supplements the acceleration power or reduction power.

[0016] A control device for a hydrogen-lithium coupled fuel cell power supply system, the device comprising: The detection data acquisition module is used to acquire the power output of the power supply system detected by the current system power output detection module, the pressure of the hydrogen storage container detected by the gas pressure sensor, and the lithium battery voltage detected by the lithium battery voltage detection module. The lithium battery control module is used to determine to shut down the fuel cell system of the power supply system when the pressure of the hydrogen storage container is less than or equal to the minimum gas pressure of the hydrogen storage container, and to control the lithium battery of the power supply system to output the power required at present. The control strategy analysis module is used to determine the control strategy of the power supply system based on the current required power output and the power output situation when the pressure of the hydrogen storage container is greater than the minimum gas pressure of the hydrogen storage container. The control module is used to control the fuel cell system and lithium battery of the power supply system to output the currently required power according to the control strategy of the power supply system.

[0017] A hydrogen-lithium coupled fuel cell power supply system, the system comprising: a system controller, a system power output detection module, a pressure sensor, a hydrogen storage container, a lithium battery, a lithium battery voltage detection module, and a fuel cell system; The system power output detection module detects the current power output of the power supply system, the gas pressure sensor detects the current pressure of the hydrogen storage container, and the lithium battery voltage detection module detects the current lithium battery voltage. When the pressure in the hydrogen storage container is less than or equal to the minimum gas pressure in the hydrogen storage container, the system controller determines to shut down the fuel cell system of the power supply system and controls the lithium battery of the power supply system to output the power required at the moment. When the pressure in the hydrogen storage container is greater than the minimum gas pressure in the hydrogen storage container, the system controller determines the control strategy of the power supply system based on the currently required power output and the power output status. The system controller controls the fuel cell system and lithium battery of the power supply system to output the required power according to the control strategy of the power supply system.

[0018] A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above-described control method for a hydrogen-lithium coupled fuel cell power supply system.

[0019] The aforementioned hydrogen-lithium coupled fuel cell power supply system control method, device, and power supply system acquire the power output of the power supply system detected by the current system power output detection module, the hydrogen storage container pressure detected by the pressure sensor, and the lithium battery voltage detected by the lithium battery voltage detection module. When the hydrogen storage container pressure is less than or equal to the minimum pressure of the hydrogen storage container, the fuel cell system of the power supply system is shut down, and the lithium battery of the power supply system is controlled to output the currently required power. When the hydrogen storage container pressure is greater than the minimum pressure of the hydrogen storage container, a control strategy for the power supply system is determined based on the currently required power output and the power output status. Based on the control strategy, the fuel cell system and lithium battery of the power supply system are controlled to output the currently required power. Through comprehensive judgment of multiple parameters, the problems of low matching accuracy and slow response of hydrogen supply and power generation in existing hydrogen-lithium coupled fuel cell power supply systems are solved, improving the endurance and safety of drones. Attached Figure Description

[0020] Figure 1 This is a flowchart illustrating a control method for a hydrogen-lithium coupled fuel cell power supply system in one embodiment.

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0022] In one embodiment, such as Figure 1 As shown, a control method for a hydrogen-lithium coupled fuel cell power supply system is provided, including the following steps: Step S220: Obtain the power output of the power supply system detected by the current system power output detection module, the pressure of the hydrogen storage container detected by the gas pressure sensor, and the lithium battery voltage detected by the lithium battery voltage detection module.

[0023] Step S240: When the pressure in the hydrogen storage container is less than or equal to the minimum gas pressure in the hydrogen storage container, determine to shut down the fuel cell system of the power supply system and control the lithium battery of the power supply system to output the power required at present.

[0024] Step S260: When the pressure of the hydrogen storage container is greater than the minimum gas pressure of the hydrogen storage container, determine the control strategy of the power supply system based on the current required power output and the power output situation.

[0025] Step S280: According to the control strategy of the power supply system, control the fuel cell system and lithium battery of the power supply system to output the power required at present.

[0026] The fuel cell system includes a hydrogen storage container, a hydrogen solenoid valve, a fuel cell air-cooling fan, a fuel cell power (current) output control module, a fuel cell air-cooling fan control module, and a fuel cell stack.

[0027] The aforementioned hydrogen-lithium coupled fuel cell power supply system control method, device, and power supply system acquire the power output of the power supply system detected by the current system power output detection module, the hydrogen storage container pressure detected by the pressure sensor, and the lithium battery voltage detected by the lithium battery voltage detection module. When the hydrogen storage container pressure is less than or equal to the minimum pressure of the hydrogen storage container, the fuel cell system of the power supply system is shut down, and the lithium battery of the power supply system is controlled to output the currently required power. When the hydrogen storage container pressure is greater than the minimum pressure of the hydrogen storage container, a control strategy for the power supply system is determined based on the currently required power output and the current power output. Based on the control strategy, the fuel cell system and lithium battery of the power supply system are controlled to output the currently required power. Through comprehensive judgment of multiple parameters, the problems of low matching accuracy and slow response between hydrogen supply and power generation in existing hydrogen-lithium coupled fuel cell power supply systems are solved, improving the endurance and safety of drones.

[0028] In one embodiment, when the pressure in the hydrogen storage container is greater than the minimum gas pressure in the hydrogen storage container, a control strategy for the power supply system is determined based on the current required power output and the power output situation, including: When the power output situation is that no power output is detected, the current required power output is zero, and the lithium battery charge is lower than the lithium battery charging charge, the control strategy of the power supply system is to control the output current of the fuel cell system to increase in a stepwise manner to the lithium battery charging power. When no power is detected and the required power is the start-up standby power, the power supply system control strategy is as follows: control the fuel cell system output current to the start-up standby power; if the fuel cell system output power is insufficient for the start-up standby power, the lithium battery will make up the difference. When the power output is set to start-up standby power and the current power requirement is standby power, the power supply system's control strategy is to control the lithium battery's output current to the standby power. When the power output is at standby power and the current power required is the lift-off power, the power supply system control strategy is to control the fuel cell system output current to rise in stages to the fuel cell rated power, and control the lithium battery output power to supplement the lift-off power. When the power output is for takeoff and the current power requirement is for cruise / hovering, the power supply system control strategy is as follows: control the fuel cell system to output cruise / hovering power, and if the fuel cell system output power is insufficient for cruise / hovering power, the lithium battery will make up the difference. When the power output is at cruise / hover power and the current required power is acceleration power or deceleration power, the power supply system control strategy is to control the fuel cell system output current to rise in a stepwise manner to the fuel cell rated power, and control the lithium battery output power to supplement the acceleration power or deceleration power.

[0029] In one embodiment, according to the control strategy of the power supply system, the fuel cell system and lithium battery of the power supply system are controlled to output the currently required power, including: The control strategy of the power supply system is as follows: when the output current of the fuel cell system is stepped up to the charging power of the lithium battery, the hydrogen solenoid valve and the fuel cell air-cooling fan of the fuel cell system are opened, the output circuit of the fuel cell system is disconnected, the flow rate of the hydrogen solenoid valve is controlled to the rated power hydrogen flow rate of the fuel cell, and after the output current of the fuel cell system is stepped up to the charging power of the lithium battery, the flow rate of the hydrogen solenoid valve is controlled to drop to the hydrogen flow rate of the fuel cell charging mode.

[0030] It should be understood that the fuel cell system generates electricity by supplying hydrogen to the fuel cell stack through a hydrogen storage container. The fuel cell air-cooled fan is used for heat dissipation during power generation.

[0031] In one embodiment, according to the control strategy of the power supply system, the fuel cell system and lithium battery of the power supply system are controlled to output the currently required power, including: The control strategy for the power supply system is as follows: control the output current of the fuel cell system to the start-up standby power. If the output power of the fuel cell system is insufficient to meet the start-up standby power, the lithium battery will supplement the power. In this case, control the hydrogen solenoid valve and the fuel cell air-cooling fan of the fuel cell system to open. Open the circuit of the fuel cell system. Control the flow rate of the hydrogen solenoid valve to the rated power hydrogen flow rate of the fuel cell. Control the output current of the fuel cell system to meet the start-up standby power. If the output power of the fuel cell system is insufficient to meet the start-up standby power, the lithium battery will supplement the power. If the start-up standby power is greater than the current step increase for each level, control the output current of the fuel cell system to increase stepwise to meet the start-up standby power.

[0032] In one embodiment, according to the control strategy of the power supply system, the fuel cell system and lithium battery of the power supply system are controlled to output the currently required power, including: The control strategy for the power supply system is as follows: while controlling the output current of the fuel cell system to rise in stages to the rated power of the fuel cell, and controlling the output power of the lithium battery to supplement the lift-off power, the hydrogen solenoid valve and the fuel cell air-cooling fan of the fuel cell system are kept open, the circuit of the fuel cell system is maintained, the flow rate of the hydrogen solenoid valve is controlled to the rated power hydrogen flow rate of the fuel cell, and the output current of the fuel cell system is controlled to rise in stages to the rated power of the fuel cell. If the output power of the fuel cell system is insufficient to the rated power of the fuel cell, the lithium battery will supplement the lift-off power. If the output power of the fuel cell system reaches the rated power of the fuel cell, the lithium battery will supplement the lift-off power.

[0033] In one embodiment, according to the control strategy of the power supply system, the fuel cell system and lithium battery of the power supply system are controlled to output the currently required power, including: The control strategy for the power supply system is as follows: control the output of the fuel cell system for cruise / hover power. If the output power of the fuel cell system is insufficient for cruise / hover power, it will be supplemented by the lithium battery. Keep the hydrogen solenoid valve and the fuel cell air-cooling fan of the fuel cell system open, maintain the circuit of the fuel cell system, control the flow rate of the hydrogen solenoid valve to the rated hydrogen flow rate of the fuel cell, and control the output current of the fuel cell system to decrease to the cruise / hover power. If the output power of the fuel cell system is insufficient for cruise / hover power, it will be supplemented by the lithium battery.

[0034] In one embodiment, according to the control strategy of the power supply system, the fuel cell system and lithium battery of the power supply system are controlled to output the currently required power, including: The control strategy for the power supply system is as follows: while controlling the output current of the fuel cell system to rise stepwise to the rated power of the fuel cell, and controlling the output power of the lithium battery to supplement the acceleration power or reduction power, the hydrogen solenoid valve and the fuel cell air-cooling fan of the fuel cell system are kept open, the circuit of the fuel cell system is maintained, the flow rate of the hydrogen solenoid valve is controlled to the rated power hydrogen flow rate of the fuel cell, and the output current of the fuel cell system is controlled to rise stepwise to the rated power of the fuel cell. If the output power of the fuel cell system is insufficient to the rated power of the fuel cell, the lithium battery supplements the acceleration power or reduction power. If the output power of the fuel cell system reaches the rated power of the fuel cell, the lithium battery supplements the acceleration power or reduction power.

[0035] The aforementioned control method for a hydrogen-lithium coupled fuel cell power supply system employs a priority principle: the hydrogen storage container pressure has the highest priority; when it falls below or equals the minimum pressure in the storage container, the fuel cell system is forcibly shut down, and only the lithium battery operates. A collaborative control mechanism links the hydrogen flow rate to the power demand of the fuel cell system (the hydrogen flow rate corresponds to the rated power of the fuel cell, and the hydrogen flow rate in the fuel cell charging mode corresponds to the charging power of the lithium battery). The fuel cell system's output current increases in a stepped manner (avoiding sudden power surges), and the lithium battery dynamically compensates for instantaneous power gaps (solving the response delay problem of the fuel cell system). A state switching logic automatically switches between "charging mode," "standby mode," and "power output mode" based on the connection status of the electronic load (such as drones, automobiles, and other devices using a hydrogen-lithium coupled fuel cell power supply system), changes in power demand, hydrogen storage capacity, and lithium battery voltage, achieving coordinated utilization of hydrogen and lithium energy. This control logic, through multi-parameter comprehensive judgment and stepped adjustment, solves the problems of low accuracy and slow response in matching hydrogen supply and power generation in existing systems, improving the range and safety of electronic loads.

[0036] In one embodiment, taking a drone using a lithium-hydrogen coupled fuel cell power supply system as an example, the specific control method for the lithium-hydrogen coupled fuel cell power supply system is as follows: (i) The hydrogen-lithium coupled fuel cell power supply system is not connected to an electronic load (i.e., the drone is not started or disconnected). The initial state of the system is as follows: the lithium battery powers the system controller, system power output detection module, air pressure sensor, etc., and all components in the power supply system are started but have no power output.

[0037] The hydrogen storage container pressure is the highest priority. If the hydrogen storage container pressure is less than the minimum hydrogen storage container pressure P1: the hydrogen solenoid valve is closed, the fuel cell air cooling fan is closed, the fuel cell system output circuit is disconnected, the hydrogen storage container pressure is continuously monitored and a message "insufficient hydrogen storage" is displayed. If the hydrogen storage container pressure is greater than the minimum hydrogen storage container pressure P1: the system is maintained, the pressure is continuously monitored and a message "sufficient hydrogen storage" is displayed.

[0038] Lithium battery voltage determination: If the lithium battery voltage > lithium battery charging capacity (voltage) V1 (no charging required): the hydrogen solenoid valve and fuel cell air-cooling fan are closed, the fuel cell system output circuit is disconnected, and the lithium battery voltage is continuously monitored; if the lithium battery voltage < V1 (charging required): enter the charging preparation state (hydrogen solenoid valve is open, the flow rate is the fuel cell rated power hydrogen flow rate; the fuel cell air-cooling fan is started; the fuel cell system output circuit is disconnected), maintain the fuel cell stack start-up preparation time T1, and then the circuit is open. The fuel cell stack output current increases in 10% current steps of the fuel cell rated power A7 (one step every 20 seconds) to the lithium battery charging power (current) A2, while the hydrogen supply flow rate is reduced to the fuel cell charging mode hydrogen flow rate Q2; then, when the lithium battery voltage reaches the lithium battery charging stop capacity (voltage) V2, the solenoid valve and fan are closed, and the output circuit is disconnected.

[0039] (ii) Connect the electronic load (when the drone is in standby or ready to start) System startup status: The power required by the drone is the startup standby power. The fuel cell system does not enter charging mode and switches to standby preparation state.

[0040] Core control logic: Hydrogen storage container pressure < P1: Same as the unconnected load state, shut down all fuel cell system related components (hydrogen solenoid valve, output circuit, fuel cell air-cooling fan controller and fuel cell air-cooling fan, etc.), continuously monitor hydrogen storage container pressure and prompt "insufficient hydrogen storage".

[0041] When the hydrogen storage container pressure is greater than P1: the hydrogen solenoid valve opens (flow rate Q1), the fuel cell air-cooling fan starts, the output circuit is disconnected, and the system remains in standby mode. If the lithium battery is turned off, all components requiring lithium battery power are shut down. The lithium battery powers the system controller, pressure sensor, system power (current) output detection module, and lithium battery (charge) voltage detection module.

[0042] (iii) Connecting electronic load midway (suddenly connecting to the drone while it is not connected) The original state is "Lithium battery does not need to be charged" (Lithium battery voltage > V1). The power required by the drone is the startup standby power. This means that after connecting the drone, it directly changes from "open circuit state" to standby preparation state (hydrogen solenoid valve and fuel cell air cooling fan are turned on, and the output circuit is disconnected).

[0043] The original state is "Lithium battery is charging" (Lithium battery voltage < V1), and the power required by the drone is the startup standby power (current) A3. After the drone is connected, it immediately exits the charging mode and switches to the standby preparation state (the hydrogen solenoid valve and fuel cell air cooling fan remain open, and the output circuit is disconnected), and the hydrogen supply flow is restored to Q1.

[0044] (iv) The flight phase of the drone (from takeoff to landing) Initial stage of takeoff and liftoff Triggering condition: The drone's required power is the standby power (current) A1, indicating that the drone is about to take off.

[0045] Hydrogen storage container pressure determination: As before, when the hydrogen storage container pressure is <P1, the fuel cell system shuts down and only the lithium battery provides power.

[0046] Power output control: During the initial stage of launch (i.e., the fuel cell stack start-up preparation time T1), the lithium battery provides all the power, the fuel cell circuit is open, and it enters the power output mode from the standby preparation state.

[0047] After the initial takeoff phase, during the ascent phase, the power required by the drone is the electronic load (drone) takeoff / descent power (current) A4. The fuel cell stack output current increases in increments of 10% of the fuel cell rated power A7 (one increment every 20 seconds) to A7. If the power demand suddenly increases during this period (such as during climbing, the power required by the drone is the electronic load (drone) acceleration power (current): A6), the difference will be made up by the lithium battery.

[0048] Cruise / Hovering Phase If the fuel cell stack output has reached A7: the fuel cell stack directly provides the power required for A5, and the lithium battery is on standby.

[0049] If the fuel cell stack does not reach A7: continue to increase the current to A7 in stages, and the lithium battery will help make up for the power gap; if the drone performs acceleration, turning or other actions (power > electronic load (drone) cruise / hover power (current) A5), the lithium battery will immediately supplement the power.

[0050] Descent and Landing Phase The power required by the drone during descent is the electronic load (drone) takeoff / descent power (current) A4, and the control logic is the same as the takeoff stage (fuel cell step-up current to A7, lithium battery assistance).

[0051] After landing, the drone requires power A3, and the system returns to standby mode. If the hydrogen storage container pressure is less than P1 at this time, all power is provided by the lithium battery.

[0052] Among them, A1 < A3 < A5 < A7 < A4 < A6 < A2.

[0053] Among them, the system power (current) output detection module detects the power supply output of the power supply system to the outside.

[0054] The pressure sensor detects the gas pressure inside the hydrogen storage container. Minimum pressure P1 of the hydrogen storage container: If the internal pressure of the hydrogen storage container is lower than the minimum pressure of the container, it means that the hydrogen content inside the container is too low to allow for normal hydrogen supply, and hydrogen needs to be replenished.

[0055] Among them, the power of drone acceleration (ascent / descent) is greater than the power of cruise / hovering.

[0056] In one embodiment, the specific power supply control logic for the unconnected electronic load (drone) is as follows: Power system switch on: Electronic load (drone) not connected.

[0057] The lithium battery is activated, providing power to the system controller. The lithium battery also powers the lithium battery (charge) voltage detection module.

[0058] When the power system switch is turned on, the lithium battery powers the system power (current) output detection module, which then activates. If no power output is detected, the required power output is zero, meaning the electronic load (drone) is not connected or is turned off.

[0059] When the power system switch is turned on, the lithium battery powers the pressure sensor, which then activates. The pressure sensor detects the pressure in the hydrogen storage container. If the pressure is ① below the minimum pressure P1, the hydrogen solenoid valve (electronic flow meter) remains closed, the fuel cell air-cooling fan remains off, and the fuel cell circuit remains open. The system continuously monitors the hydrogen storage container pressure, maintaining the highest priority for fuel cell system control. A signal indicates the hydrogen storage container is below the minimum pressure. If the pressure sensor detects the pressure in the hydrogen storage container ② above the minimum pressure P1, the system maintains this state, continuously monitoring the hydrogen storage container pressure. A signal indicates the hydrogen storage container is above the minimum pressure.

[0060] The lithium battery (charge) voltage detection module detects that the lithium battery charge (voltage) is higher than the lithium battery charging charge (voltage) V1. The hydrogen solenoid valve (electronic flow meter) remains closed, the fuel cell air-cooling fan remains off, and the fuel cell circuit remains open. The lithium battery charge (voltage) is continuously monitored.

[0061] The lithium battery (charge) voltage detection module detects that the lithium battery charge (voltage) is lower than the lithium battery charging charge (voltage): V1. The fuel cell stack enters charging mode to charge the lithium battery. A fuel cell stack charging mode signal is displayed. The hydrogen solenoid valve (electronic flow meter) opens, the fuel cell air-cooling fan turns on, and the fuel cell stack output circuit is disconnected.

[0062] The lithium battery powers the fuel cell air-cooling fan and its control module, activating the air-cooling fan. The lithium battery also powers the hydrogen solenoid valve (electronic flow meter), activating it and controlling the flow rate to the fuel cell's rated power hydrogen flow rate Q1. With the fuel cell air-cooling fan and the hydrogen solenoid valve activated, the fuel cell stack's output circuit is disconnected, and the fuel cell stack enters the start-up preparation state.

[0063] The fuel cell stack enters the start-up preparation state. After a start-up preparation time T1, the fuel cell stack output circuit is activated, and the fuel cell stack enters charging mode. The fuel cell power (current) output control module controls the output current to increase in steps, with each step representing 10% of the fuel cell's rated power A7, spaced 20 seconds apart. That is, after the fuel cell stack start-up preparation time T1, the output current is controlled to be 10% of the fuel cell's rated power A7; after 20 seconds, the output current is controlled to be 20% of the fuel cell's rated power A7; after another 20 seconds, the output current is controlled to be 30% of the fuel cell's rated power A7, until the lithium battery charging power (current) A2. The hydrogen solenoid valve (electronic flow meter) controls the flow rate to decrease from the fuel cell's rated power hydrogen flow rate Q1 to the fuel cell charging mode hydrogen flow rate Q2.

[0064] After the fuel cell stack enters charging mode, the lithium battery (charge) voltage detection module detects the lithium battery charge (voltage). When the lithium battery charge (voltage) reaches the lithium battery charging stop charge (voltage) V2, the hydrogen solenoid valve (electronic flow meter) closes, the fuel cell air-cooling fan shuts off, and the fuel cell stack output circuit is disconnected.

[0065] When the power system switch is off, the fuel cell stack output circuit is open, the hydrogen solenoid valve (electronic flow meter) is closed, and the fuel cell air-cooling fan is off. During fuel cell stack charging, if the power system switch is off, the fuel cell stack output circuit is open, the hydrogen solenoid valve (electronic flow meter) is closed, and the fuel cell air-cooling fan is off.

[0066] In one embodiment, the specific power supply control logic for the connected electronic load (drone) is as follows: Power system switch on: Electronic load (drone) connected.

[0067] The power system switch is on, and the lithium battery powers the system controller. The lithium battery also powers the lithium battery (charge) voltage detection module.

[0068] When the power system switch is turned on, the lithium battery powers the system power (current) output detection module, which then starts. Upon detecting that the electronic load (drone) has started its standby power (current) A3 output, the power system switch is turned on after the electronic load (drone) is connected.

[0069] When the power system switch is turned on, the lithium battery powers the pressure sensor, and the pressure sensor is activated.

[0070] A pressure sensor detects the pressure in the hydrogen storage container. ① If the pressure is below the minimum pressure P1 of the hydrogen storage container, the hydrogen solenoid valve (electronic flow meter) remains closed, the fuel cell air-cooling fan remains off, and the fuel cell stack circuit remains open. Continuous monitoring of the hydrogen storage container pressure prioritizes control of the fuel cell system. A signal indicating that the hydrogen storage container is below the minimum pressure is displayed.

[0071] The pressure sensor detects the pressure in the hydrogen storage container. ② If the pressure is higher than the minimum pressure P1 of the hydrogen storage container, the pressure in the hydrogen storage container will be continuously monitored. A signal will be given indicating that the hydrogen storage container is above the minimum pressure.

[0072] The power required by the electronic load (drone) is detected to be the startup standby power (current) A3. The fuel cell stack does not enter charging mode, but enters standby mode. The hydrogen solenoid valve (electronic flow meter) is open, the fuel cell air-cooling fan is turned on, and the fuel cell stack circuit remains open.

[0073] The lithium battery powers the fuel cell air-cooling fan and its control module, activating the air-cooling fan. The lithium battery also powers the hydrogen solenoid valve (electronic flow meter), activating it and controlling the flow rate to the fuel cell's rated power hydrogen flow rate Q1. With the fuel cell air-cooling fan and flow meter activated, the fuel cell stack enters standby mode. During standby, if the lithium battery is shut down, the fuel cell stack circuit is open, the hydrogen solenoid valve (electronic flow meter) closes, and the fuel cell air-cooling fan shuts down.

[0074] In one embodiment, the specific control logic for connecting an electronic load (drone) after the power system switch is turned on without the electronic load (drone) being connected is as follows: Power system switch on state: Electronic load (drone) not connected, lithium battery on, lithium battery powers system controller. Lithium battery powers lithium battery (charge) voltage detection module.

[0075] When the power system switch is turned on, the lithium battery powers the system power (current) output detection module, which then activates. If no power output is detected, it means the electronic load (drone) is not connected or is turned off.

[0076] The lithium battery powers the pressure sensor, which then activates and detects the pressure in the hydrogen storage container. If the pressure is below the minimum pressure P1, the hydrogen solenoid valve (electronic flow meter) closes, the fuel cell air-cooling fan shuts off, and the fuel cell output circuit is disconnected. This state is maintained, continuously monitoring the hydrogen storage container pressure and controlling the fuel cell system with the highest priority. A signal indicates the hydrogen storage container is below the minimum pressure. If the pressure is above the minimum pressure P1, the pressure sensor continues to monitor the hydrogen storage container pressure. A signal indicates the hydrogen storage container is above the minimum pressure.

[0077] The lithium battery (charge) voltage detection module detects that the lithium battery charge (voltage) is lower than the lithium battery charging charge (voltage) V1. The fuel cell stack then enters charging mode to charge the lithium battery. A fuel cell charging mode signal is displayed. The hydrogen solenoid valve (electronic flow meter) opens, the fuel cell air-cooling fan turns on, and the fuel cell stack output circuit is disconnected.

[0078] The lithium battery powers the fuel cell air-cooling fan and its control module, activating the air-cooling fan. The air-cooling fan control module is part of the fuel cell stack system and requires only power; no additional control is needed. The lithium battery also powers the hydrogen solenoid valve (electronic flow meter), activating it and controlling the flow rate at the fuel cell's rated power hydrogen flow rate Q1.

[0079] The fuel cell air-cooling fan starts, the hydrogen solenoid valve (electronic flow meter) starts, the fuel cell output circuit is disconnected, and the fuel cell stack enters the start-up preparation state.

[0080] The fuel cell stack enters the start-up preparation state. After a start-up preparation time T1, the fuel cell circuit is activated, and the fuel cell enters charging mode. The fuel cell power (current) output control module controls the output current to increase in steps, with each step representing 10% of the fuel cell's rated power A7, spaced 20 seconds apart. That is, after the fuel cell stack start-up preparation time T1, the output current is controlled to be 10% of the fuel cell's rated power A7; after 20 seconds, the output current is controlled to be 20% of the fuel cell's rated power A7; after another 20 seconds, the output current is controlled to be 30% of the fuel cell's rated power A7, until the lithium battery charging power (current): A2. The hydrogen solenoid valve (electronic flow meter) controls the flow rate to decrease from the fuel cell's rated power hydrogen flow rate Q1 to the fuel cell charging mode hydrogen flow rate Q2.

[0081] After the fuel cell stack enters charging mode, the lithium battery (charge) voltage detection module detects the lithium battery charge (voltage). When the lithium battery charge (voltage) reaches the charging stop level V2, the hydrogen solenoid valve (electronic flow meter) closes, the fuel cell air-cooling fan shuts off, and the fuel cell output circuit is disconnected.

[0082] Mid-flight connection of electronic payload (drone): The power required for testing is the electronic load (drone) startup standby power (current) A3. The fuel cell stack exits charging mode and enters standby mode. The hydrogen solenoid valve (electronic flow meter) remains open, the fuel cell air-cooling fan remains on, and the fuel cell stack output circuit is disconnected.

[0083] The lithium battery powers the fuel cell air-cooling fan and its control module, starting the fuel cell air-cooling fan. The fuel cell air-cooling fan control module is part of the fuel cell stack system and only requires power; no additional control is needed.

[0084] The lithium battery powers the hydrogen solenoid valve (electronic flow meter), which is activated. The flow control is set to the hydrogen flow rate Q1 at the fuel cell's rated power. The fuel cell air-cooling fan is activated, the hydrogen solenoid valve (electronic flow meter) is activated, and the fuel cell stack enters standby preparation state.

[0085] During fuel cell standby mode, if the lithium battery is off, the fuel cell circuit remains open, the hydrogen solenoid valve (electronic flow meter) is closed, and the fuel cell air-cooling fan is off.

[0086] In one embodiment, the specific control logic for the drone's ascent start-up state is as follows: During the initial ascent of the drone, the drone is in standby mode, and the required power is the drone standby power (current) A1. The fuel cell stack is in standby preparation mode.

[0087] The lithium battery powers the system controller, pressure sensor, system power (current) output detection module, lithium battery (charge) voltage detection module, and power output (current) control module.

[0088] The power required for a drone to take off is greater than the drone's standby power (current) A1.

[0089] The pressure sensor detects the pressure in the hydrogen storage container. ① If the pressure is below the minimum pressure P1 of the hydrogen storage container, the hydrogen solenoid valve (electronic flow meter) closes, the fuel cell air-cooling fan shuts off, and the fuel cell output circuit is disconnected. This state is maintained, continuously monitoring the hydrogen storage container pressure and controlling the fuel cell system with the highest priority. A signal indicating the hydrogen storage container is below the minimum pressure is displayed. ② If the pressure sensor detects the pressure in the hydrogen storage container, ② if the pressure is above the minimum pressure P1, the pressure sensor continues to monitor the hydrogen storage container pressure. A signal indicating the hydrogen storage container is above the minimum pressure is displayed.

[0090] At the start of the power-up phase, the lithium battery provides full power output (i.e., the drone's standby power (current) A1). The fuel cell stack circuit is activated, and the fuel cell stack transitions from standby preparation to power output. After the fuel cell stack is in standby state for a startup preparation time T1, the fuel cell stack circuit is activated, and the fuel cell stack enters power output mode. The fuel cell power (current) output control module controls the output current to increase in steps, with each step representing 10% of the fuel cell's rated power A7, spaced 20 seconds apart. That is, after the fuel cell stack startup preparation time T1, the output current is controlled at 10% of the fuel cell's rated power A7; after 20 seconds, the output current is controlled at 20% of the fuel cell's rated power A7; after another 20 seconds, the output current is controlled at 30% of the fuel cell's rated power A7, until the fuel cell's rated power A7 is reached. During the step-up phase of the fuel cell stack's output current, the lithium battery supplements the fuel cell's power output, and when the power demand increases instantaneously, the lithium battery assists in providing power output.

[0091] After the drone's ascent and launch phase ends, the drone enters hovering / cruising mode. ① The fuel cell stack's output power has reached the fuel cell's rated power A7. The fuel cell stack provides the power output required for the drone's entire hovering / cruising power (current) A5.

[0092] After the drone's ascent start-up phase ends, the drone enters hovering / cruising mode. ② The fuel cell stack's output power does not reach the fuel cell's rated power A7. During the step-up phase of the fuel cell stack's output current, until the fuel cell's rated power A7 is reached, the lithium battery compensates for the insufficient fuel cell power output.

[0093] When the drone is hovering / cruising, ① the output power of the fuel cell stack has reached the fuel cell's rated power A7. When the drone is performing technical maneuvers such as acceleration, turning, or ascent, the lithium battery compensates for any power output deficiency.

[0094] When the drone is hovering / cruising, ② the output power of the fuel cell stack does not reach the rated power A7 of the fuel cell. During the step-up phase of the fuel cell stack output current until the rated power A7 of the fuel cell is reached, the lithium battery compensates for the insufficient power output when no one is performing technical actions such as acceleration, turning, or ascent.

[0095] As the drone transitions from hovering to descent, ① the output power of the fuel cell stack has reached the rated power A7 of the fuel cell, and the insufficient power output is supplemented by the lithium battery.

[0096] As the drone transitions from hovering to descent, ② the fuel cell stack's output power does not reach the fuel cell's rated power A7. During the step-up phase of the fuel cell's output current until it reaches the fuel cell's rated power A7, if the drone is not performing any technical maneuvers such as acceleration, turning, or ascent, the lithium battery compensates for the insufficient power output.

[0097] The drone's descent has ended, and the drone has landed. The drone's power output has dropped to the electronic load (drone) startup standby power (current) A3. The system power (current) output detection module detects the electronic load (drone) startup standby power (current) A3 power output.

[0098] The pressure sensor detects the pressure in the hydrogen storage container, and step ② is lower than the minimum pressure P1 of the hydrogen storage container. The pressure in the hydrogen storage container is continuously monitored. All power output is provided by the lithium battery.

[0099] It should be understood that, although Figure 1 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 1 At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0100] In one embodiment, a control device for a lithium-hydrogen coupled fuel cell power supply system includes: The detection data acquisition module is used to acquire the power output of the power supply system detected by the current system power output detection module, the pressure of the hydrogen storage container detected by the gas pressure sensor, and the lithium battery voltage detected by the lithium battery voltage detection module. The lithium battery control module is used to determine when to shut down the power supply system of the fuel cell system when the pressure of the hydrogen storage container is less than or equal to the minimum gas pressure of the hydrogen storage container, and to control the lithium battery of the power supply system to output the power required at present. The control strategy analysis module is used to determine the control strategy of the power supply system based on the current required power output and power output status when the pressure of the hydrogen storage container is greater than the minimum gas pressure of the hydrogen storage container. The control module is used to control the fuel cell system and lithium battery of the power supply system to output the required power according to the control strategy of the power supply system.

[0101] Specific limitations regarding the control device for the lithium-hydrogen coupled fuel cell power supply system can be found in the limitations of the control method for the lithium-hydrogen coupled fuel cell power supply system described above, and will not be repeated here. Each module in the control device of the aforementioned lithium-hydrogen coupled fuel cell power supply system can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0102] In one embodiment, a hydrogen-lithium coupled fuel cell power supply system includes: a system controller, a system power output detection module, a pressure sensor, a hydrogen storage container, a lithium battery, a lithium battery voltage detection module, and a fuel cell system. The system power output detection module detects the current power output of the power supply system, the gas pressure sensor detects the current pressure of the hydrogen storage container, and the lithium battery voltage detection module detects the current lithium battery voltage. When the pressure in the hydrogen storage container is less than or equal to the minimum gas pressure in the hydrogen storage container, the system controller determines to shut down the fuel cell system power supply system and controls the lithium battery power supply system to output the power required at the moment. When the pressure in the hydrogen storage container is greater than the minimum gas pressure in the hydrogen storage container, the system controller determines the control strategy of the power supply system based on the current required power output and the power output status. The system controller controls the fuel cell system and lithium battery of the power supply system to output the required power according to the control strategy of the power supply system.

[0103] Specific limitations regarding the hydrogen-lithium coupled fuel cell power supply system can be found in the limitations of the control method for the hydrogen-lithium coupled fuel cell power supply system mentioned above, and will not be repeated here. Each module in the aforementioned hydrogen-lithium coupled fuel cell power supply system can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in hardware or independently of the processor in a computer device, or stored in software in the memory of a computer device, so that the processor can call and execute the corresponding operations of each module.

[0104] In one embodiment, a computer-readable storage medium storing a computer program is characterized in that, when executed by a processor, the computer program implements the steps of the above-described control method for a hydrogen-lithium coupled fuel cell power supply system.

[0105] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0106] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A control method for a hydrogen-lithium coupled fuel cell power supply system, characterized in that, The method includes: The system acquires the power output of the power supply system detected by the current system power output detection module, the pressure of the hydrogen storage container detected by the gas pressure sensor, and the lithium battery voltage detected by the lithium battery voltage detection module. If the pressure in the hydrogen storage container is less than or equal to the minimum gas pressure in the hydrogen storage container, determine to shut down the fuel cell system of the power supply system and control the lithium battery of the power supply system to output the power currently required; When the pressure of the hydrogen storage container is greater than the minimum gas pressure of the hydrogen storage container, the control strategy of the power supply system is determined based on the current required power output and the power output situation. According to the control strategy of the power supply system, the fuel cell system and lithium battery of the power supply system are controlled to output the power currently required.

2. The method according to claim 1, characterized in that, When the pressure in the hydrogen storage container is greater than the minimum gas pressure of the hydrogen storage container, the control strategy of the power supply system is determined based on the currently required power output and the power output situation, including: When the power output situation is that no power output is detected, the current required power output is zero, and the lithium battery charge is lower than the lithium battery charging charge, the control strategy of the power supply system is to control the output current of the fuel cell system to increase in a stepwise manner to the lithium battery charging power. When no power is detected and the required power is the start-up standby power, the control strategy of the power supply system is to control the output current of the fuel cell system to the start-up standby power. If the output power of the fuel cell system is insufficient for the start-up standby power, the lithium battery will make up the difference. When the power output is set to standby power and the current power requirement is standby power, the control strategy of the power supply system is to control the lithium battery output current to the standby power. When the power output is in standby mode and the current required power is for launch, the control strategy of the power supply system is to control the output current of the fuel cell system to rise in a stepwise manner to the rated power of the fuel cell, and to control the output power of the lithium battery to supplement the launch power. When the power output is for takeoff and the current power required is for cruise / hovering, the control strategy of the power supply system is as follows: control the fuel cell system to output cruise / hovering power, and if the output power of the fuel cell system is insufficient for cruise / hovering power, the lithium battery will make up the difference. When the power output is at the cruise / hover power level and the current required power is the acceleration power or the deceleration power level, the control strategy of the power supply system is to control the output current of the fuel cell system to rise in a stepwise manner to the rated power of the fuel cell, and to control the output power of the lithium battery to supplement the acceleration power or the deceleration power level.

3. The method according to claim 2, characterized in that, The step of controlling the fuel cell system and lithium battery of the power supply system to output the currently required power according to the control strategy of the power supply system includes: The control strategy of the power supply system is as follows: when the output current of the fuel cell system is stepped up to the lithium battery charging power, the hydrogen solenoid valve and the fuel cell air cooling fan of the fuel cell system are opened, the output circuit of the fuel cell system is disconnected, the flow rate of the hydrogen solenoid valve is controlled to the fuel cell rated power hydrogen flow rate, and after the output current of the fuel cell system is stepped up to the lithium battery charging power, the flow rate of the hydrogen solenoid valve is controlled to drop to the fuel cell charging mode hydrogen flow rate.

4. The method according to claim 2, characterized in that, The step of controlling the fuel cell system and lithium battery of the power supply system to output the currently required power according to the control strategy of the power supply system includes: The control strategy of the power supply system is as follows: control the output current of the fuel cell system to the start-up standby power. If the output power of the fuel cell system is insufficient for the start-up standby power, it is supplemented by the lithium battery. In this case, control the hydrogen solenoid valve and the fuel cell air-cooling fan of the fuel cell system to open. In the circuit path of the fuel cell system, control the flow rate of the hydrogen solenoid valve to the rated power hydrogen flow rate of the fuel cell. Control the output current of the fuel cell system to the start-up standby power. If the output power of the fuel cell system is insufficient for the start-up standby power, it is supplemented by the lithium battery. If the start-up standby power is greater than the current step increase of each level, control the output current of the fuel cell system to increase stepwise to the start-up standby power.

5. The method according to claim 2, characterized in that, The step of controlling the fuel cell system and lithium battery of the power supply system to output the currently required power according to the control strategy of the power supply system includes: The control strategy of the power supply system is as follows: while controlling the output current of the fuel cell system to rise stepwise to the rated power of the fuel cell, and controlling the output power of the lithium battery to supplement the lift-off power, the hydrogen solenoid valve and the fuel cell air-cooling fan of the fuel cell system are kept open, the circuit of the fuel cell system is maintained, the flow rate of the hydrogen solenoid valve is controlled to the rated power hydrogen flow rate of the fuel cell, and the output current of the fuel cell system is controlled to rise stepwise to the rated power of the fuel cell. If the output power of the fuel cell system is insufficient to the rated power of the fuel cell, the lithium battery supplements the lift-off power. If the output power of the fuel cell system reaches the rated power of the fuel cell, the lithium battery supplements the lift-off power.

6. The method according to claim 2, characterized in that, The step of controlling the fuel cell system and lithium battery of the power supply system to output the currently required power according to the control strategy of the power supply system includes: The control strategy of the power supply system is as follows: control the output of the fuel cell system to cruise / hover power. If the output power of the fuel cell system is insufficient for cruise / hover power, it is supplemented by the lithium battery. Keep the hydrogen solenoid valve and the fuel cell air-cooling fan of the fuel cell system open. Keep the circuit of the fuel cell system open. Control the flow rate of the hydrogen solenoid valve to the rated power hydrogen flow rate of the fuel cell. Control the output current of the fuel cell system to decrease to the cruise / hover power. If the output power of the fuel cell system is insufficient for cruise / hover power, it is supplemented by the lithium battery.

7. The method according to claim 2, characterized in that, The step of controlling the fuel cell system and lithium battery of the power supply system to output the currently required power according to the control strategy of the power supply system includes: The control strategy of the power supply system is as follows: while controlling the output current of the fuel cell system to rise stepwise to the rated power of the fuel cell, and controlling the output power of the lithium battery to supplement the acceleration power or reduction power, the hydrogen solenoid valve and the fuel cell air-cooling fan of the fuel cell system are kept open, the circuit of the fuel cell system is maintained, the flow rate of the hydrogen solenoid valve is controlled to the rated power hydrogen flow rate of the fuel cell, and the output current of the fuel cell system is controlled to rise stepwise to the rated power of the fuel cell. If the output power of the fuel cell system is insufficient to the rated power of the fuel cell, the lithium battery supplements the acceleration power or reduction power. If the output power of the fuel cell system reaches the rated power of the fuel cell, the lithium battery supplements the acceleration power or reduction power.

8. A control device for a hydrogen-lithium coupled fuel cell power supply system, characterized in that, The device includes: The detection data acquisition module is used to acquire the power output of the power supply system detected by the current system power output detection module, the pressure of the hydrogen storage container detected by the gas pressure sensor, and the lithium battery voltage detected by the lithium battery voltage detection module. The lithium battery control module is used to determine to shut down the fuel cell system of the power supply system when the pressure of the hydrogen storage container is less than or equal to the minimum gas pressure of the hydrogen storage container, and to control the lithium battery of the power supply system to output the power required at present. The control strategy analysis module is used to determine the control strategy of the power supply system based on the current required power output and the power output situation when the pressure of the hydrogen storage container is greater than the minimum gas pressure of the hydrogen storage container. The control module is used to control the fuel cell system and lithium battery of the power supply system to output the currently required power according to the control strategy of the power supply system.

9. A hydrogen-lithium coupled fuel cell power supply system, characterized in that, The system includes: a system controller, a system power output detection module, a pressure sensor, a hydrogen storage container, a lithium battery, a lithium battery voltage detection module, and a fuel cell system. The system power output detection module detects the current power output of the power supply system, the gas pressure sensor detects the current pressure of the hydrogen storage container, and the lithium battery voltage detection module detects the current lithium battery voltage. When the pressure in the hydrogen storage container is less than or equal to the minimum gas pressure in the hydrogen storage container, the system controller determines to shut down the fuel cell system of the power supply system and controls the lithium battery of the power supply system to output the power required at the moment. When the pressure in the hydrogen storage container is greater than the minimum gas pressure in the hydrogen storage container, the system controller determines the control strategy of the power supply system based on the currently required power output and the power output status. The system controller controls the fuel cell system and lithium battery of the power supply system to output the required power according to the control strategy of the power supply system.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the control method for the hydrogen-lithium coupled fuel cell power supply system as described in any one of claims 1 to 7.

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