Environment treatment method and device for fuel cell for fixed-wing unmanned aerial vehicle

Abstract

The invention provides an environment treatment method and device of a fuel cell for a fixed-wing unmanned aerial vehicle, and relates to the technical field of fuel cells. The method comprises the following steps: determining the oxygen content and the hydrogen content in an operation environment of the closed fuel cell; in response to the fact that the oxygen content is smaller than a first threshold value and the hydrogen content is larger than or equal to a second threshold value, the rotating speed of the air inlet fan is adjusted to be the maximum rotating speed; acquiring temperature information and humidity information of the operating environment in response to the condition that the oxygen content in the operating environment is greater than or equal to a first threshold value after the rotating speed of the air inlet fan is adjusted; the rotating speed of the cooling fan and the exhaust interval of the exhaust valve are adjusted according to the temperature information and the humidity information. The operation environment of the fuel cell in the unmanned aerial vehicle can be monitored in time, and the rotating speed of the cooling fan and the exhaust interval of the exhaust valve are correspondingly controlled for different temperature and humidity environments, so that the temperature and humidity in the operation environment are more suitable for operation of the fuel cell, the performance of the unmanned aerial vehicle fuel cell is improved, and the service life of the unmanned aerial vehicle fuel cell is prolonged. And battery loss is reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of fuel cell technology, and in particular to an environmental treatment method and device for a fuel cell for a fixed-wing unmanned aerial vehicle. Background Art

[0002] When fixed-wing drones fly at high altitudes and high speeds, the air flow field on the surface of the casing is complex. The higher the drone is, the lower the air pressure and oxygen content. Once the drone's oxygen content decreases, the cathode reaction gas supply is insufficient, and the fuel cell is at risk of hypoxia. The hydrogen fuel cell is prone to "suffocation" and reverse polarity occurs, which will cause the proton exchange membrane to age faster, thereby endangering the service life of the hydrogen fuel cell. In addition, fuel cells are sensitive to environmental temperature and humidity. When the drone is performing a flight mission, as the power of the fuel cell stack increases, the heat generated by the stack increases, and more reaction water is generated. The temperature and humidity differences in the high-altitude operating environment may affect the performance of the fuel cell, thereby affecting the safety of the drone's operation. Summary of the invention

[0003] The present disclosure aims to solve one of the technical problems in the related art at least to some extent.

[0004] To this end, the first embodiment of the present disclosure proposes an environmental treatment method for a fuel cell for a fixed-wing UAV, wherein the fixed-wing UAV includes a closed fuel cell, a cooling fan, an exhaust valve, and an air intake fan; the method includes:

[0005] determining the oxygen content and the hydrogen content in the operating environment of the closed fuel cell;

[0006] In response to the oxygen content being less than a first threshold value and the hydrogen content being greater than or equal to a second threshold value, adjusting the speed of the air intake fan to a maximum speed;

[0007] In response to the oxygen content in the operating environment being greater than or equal to the first threshold after the speed of the air intake fan is adjusted, acquiring temperature information and humidity information of the operating environment;

[0008] The rotation speed of the cooling fan and the exhaust interval of the exhaust valve are adjusted according to the temperature information and the humidity information.

[0009] In some embodiments of the present disclosure, adjusting the rotational speed of the cooling fan and the exhaust interval of the exhaust valve according to the temperature information and the humidity information includes: obtaining a pre-established mapping relationship between the temperature information, the humidity information and the rotational speed of the cooling fan, and the exhaust interval of the exhaust valve; determining a target rotational speed of the cooling fan and a target exhaust interval of the exhaust valve according to the mapping relationship and the temperature information and the humidity information; adjusting the rotational speed of the cooling fan according to the target rotational speed, and adjusting the exhaust interval of the exhaust valve according to the target exhaust interval.

[0010] In some embodiments of the present disclosure, adjusting the rotation speed of the cooling fan and the exhaust interval of the exhaust valve according to the temperature information and the humidity information includes: performing PID control on the rotation speed of the cooling fan according to a first difference between the temperature information and a preset temperature threshold, and performing PID control on the exhaust interval of the exhaust valve according to a second difference between the humidity information and a preset humidity threshold.

[0011] In some embodiments of the present disclosure, adjusting the rotation speed of the cooling fan and the exhaust interval of the exhaust valve according to the temperature information and the humidity information includes: in response to the temperature information being greater than the maximum temperature value in the normal temperature interval, and the humidity information being greater than or equal to the maximum humidity value in the normal humidity interval, increasing the rotation speed of the cooling fan according to the rotation speed adjustment step, and reducing the exhaust interval of the exhaust valve according to the interval adjustment step, until the temperature information is in the normal temperature interval, and the humidity information is in the normal humidity interval; or, in response to the temperature information being greater than the maximum temperature value in the normal temperature interval, and the humidity information being less than the minimum humidity value in the normal humidity interval, increasing the rotation speed of the cooling fan according to the rotation speed adjustment step, and increasing the exhaust interval of the exhaust valve according to the interval adjustment step, until the temperature information is in the normal temperature interval. the normal temperature interval, and the humidity information is in the normal humidity interval; or, in response to the temperature information being less than the minimum temperature value in the normal temperature interval, and the humidity information being greater than the maximum humidity value in the normal humidity interval, the speed of the cooling fan is reduced according to the speed adjustment step, and the exhaust interval of the exhaust valve is reduced according to the interval adjustment step, until the temperature information is in the normal temperature interval, and the humidity information is in the normal humidity interval; or, in response to the temperature information being less than the minimum temperature value in the normal temperature interval, and the humidity information being less than the minimum humidity value in the normal humidity interval, the speed of the cooling fan is reduced according to the speed adjustment step, and the exhaust interval of the exhaust valve is increased according to the interval adjustment step, until the temperature information is in the normal temperature interval, and the humidity information is in the normal humidity interval.

[0012] In some embodiments of the present disclosure, the method also includes: in response to the oxygen content in the operating environment being less than the first threshold value, and / or the hydrogen content being less than the second threshold value after adjusting the rotational speed of the air intake fan, generating UAV temperature and humidity alarm information, sending the UAV temperature and humidity alarm information to the terminal, and controlling the UAV to stop operating.

[0013] In some embodiments of the present disclosure, the fixed-wing UAV also includes: a lithium battery; the method also includes: in response to the oxygen content in the operating environment being less than the first threshold value, and / or the hydrogen content being less than the second threshold value after adjusting the rotation speed of the air intake fan, generating and sending UAV temperature and humidity alarm information to the terminal, and controlling the fuel cell to stop powering the fixed-wing UAV, and controlling the lithium battery to power the fixed-wing UAV.

[0014] The second aspect of the present disclosure provides an environmental treatment device for a fuel cell for a fixed-wing UAV, characterized in that the fixed-wing UAV includes a closed fuel cell, a cooling fan, an exhaust valve, and an air intake fan; the device includes:

[0015] A determination module, used to determine the oxygen content and hydrogen content in the operating environment of the closed fuel cell;

[0016] a first regulating module, configured to adjust the speed of the air intake fan to a maximum speed in response to the oxygen content being less than a first threshold and the hydrogen content being greater than or equal to a second threshold;

[0017] an acquisition module, configured to acquire temperature information and humidity information of the operating environment in response to the oxygen content in the operating environment being greater than or equal to the first threshold after the rotation speed of the air inlet fan is adjusted;

[0018] The second regulating module is used to regulate the rotation speed of the cooling fan and the exhaust interval of the exhaust valve according to the temperature information and the humidity information.

[0019] The third aspect of the present disclosure provides a fixed-wing UAV, characterized in that it includes: a closed fuel cell, a cooling fan, an exhaust valve, an air intake fan and a fuel cell controller;

[0020] The fuel cell controller is used to implement the method described in the first aspect above.

[0021] In some embodiments of the present disclosure, the fixed-wing UAV further includes: an air inlet cover; the air inlet cover is arranged outside the fixed-wing UAV, and a vent is left between the air inlet cover and the fuselage of the fixed-wing UAV.

[0022] In some embodiments of the present disclosure, the fixed-wing UAV further includes: a lithium battery.

[0023] The environmental treatment method for a fuel cell for a fixed-wing UAV provided by the present disclosure can timely monitor the oxygen content, hydrogen content, temperature and humidity of the fuel cell operating environment in the UAV. When the oxygen content is too low, the oxygen content is maintained within a normal range by controlling the speed of the air intake fan to support the normal operation of the fuel cell. For different temperature and humidity environments, the speed of the cooling fan and the exhaust interval of the exhaust valve are controlled accordingly, so that the temperature and humidity in the operating environment are more suitable for the operation of the fuel cell, thereby improving the performance and life of the UAV fuel cell and reducing battery loss.

[0024] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present disclosure will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0026] Figure 1 A schematic flow chart of an environmental treatment method for a fuel cell for a fixed-wing UAV provided in an embodiment of the present disclosure;

[0027] Figure 2 A schematic diagram of a fixed-wing UAV provided by an embodiment of the present disclosure;

[0028] Figure 3 A schematic diagram of an environmental treatment device for a fuel cell used in a fixed-wing UAV provided by an embodiment of the present disclosure;

[0029] Figure 4 A schematic diagram of a fuel cell controller provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] Embodiments of the present disclosure are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0031] Specifically, the environmental treatment method and device for a fuel cell for a fixed-wing UAV according to an embodiment of the present disclosure will be described below with reference to the accompanying drawings.

[0032] Figure 1 A schematic flow chart of an environmental treatment method for a fuel cell for a fixed-wing UAV provided in an embodiment of the present disclosure. Figure 2 Schematic diagram of a fixed-wing UAV provided by an embodiment of the present disclosure. Figure 2As shown, the fixed-wing UAV includes: a closed fuel cell 1, a cooling fan 2, an exhaust valve 3, and an air intake fan 4.

[0033] Among them, the closed fuel cell 1 is a closed hydrogen fuel cell stack, which can separate the heat dissipation channel and the intake channel, the fan provides heat dissipation, and the air intake fan provides reaction oxygen.

[0034] The cooling fan 2 is used to provide the closed fuel cell 1 with the required air volume for cooling the battery.

[0035] The exhaust valve 3 is used to exhaust the unreacted hydrogen and the water vapor generated by the reaction.

[0036] The air intake fan 4 is used to provide air intake volume and pressure in the drone.

[0037] In addition, the fixed-wing UAV in this embodiment may also include a hydrogen cylinder 5, a pressure reducing valve 6 and a hydrogen inlet valve 7. The hydrogen cylinder 5 is used to provide reaction hydrogen for the closed fuel cell 1. The hydrogen cylinder may contain 35 MPa hydrogen (this value is only exemplary), which is about 70 kPa after passing through the pressure reducing valve 6. The hydrogen inlet valve 7 is used to control the on and off of hydrogen inlet.

[0038] based on Figure 2 The fixed-wing UAV shown in the embodiment, the environmental treatment method for the fuel cell of the fixed-wing UAV proposed in the embodiment of the present disclosure is as follows Figure 1 As shown, the following steps may be included:

[0039] Step 101 : determining the oxygen content and hydrogen content in the operating environment of the closed fuel cell.

[0040] It should be noted that the closed fuel cell is arranged inside the drone, and the operating environment of the closed fuel cell is the operating environment of the closed fuel cell inside the drone. In some embodiments of the present disclosure, the oxygen content and hydrogen content in the operating environment of the closed fuel cell can be obtained by a hydrogen concentration detector and an oxygen concentration detector arranged inside the drone.

[0041] Step 102, in response to the oxygen content being less than a first threshold value and the hydrogen content being greater than or equal to a second threshold value, adjusting the speed of the air intake fan to a maximum speed.

[0042] When the oxygen content is less than the first threshold and the hydrogen content is greater than or equal to the second threshold, it means that the oxygen content in the current operating environment of the fuel cell is too low and the hydrogen content is normal. The speed of the air intake fan can be adjusted to the maximum speed and the oxygen content can continue to be monitored in real time.

[0043] Step 103 , in response to the oxygen content in the operating environment being greater than or equal to a first threshold after the rotation speed of the air inlet fan is adjusted, temperature information and humidity information of the operating environment are acquired.

[0044] When the speed of the air intake fan is adjusted to the maximum speed, the oxygen content in the fuel cell operating environment is greater than or equal to the first threshold, and the temperature information and humidity information of the operating environment are further determined to determine whether the current fuel cell operating environment is safe.

[0045] Optionally, in some embodiments of the present disclosure, after the speed of the air intake fan is adjusted to the maximum speed, it is also possible to determine whether the oxygen content meets the safety operation requirements through the power of the fuel cell. In one embodiment, after the speed of the air intake fan is adjusted to the maximum speed, the power change of the fuel cell within a preset time period can be monitored. If the power difference within the preset time period is greater than the preset difference, it means that the oxygen content cannot maintain the normal operation of the fuel cell. If the power difference within the preset time period is less than or equal to the preset difference, it means that the oxygen content after adjusting the speed of the air intake fan can maintain the normal operation of the fuel cell.

[0046] In some embodiments of the present disclosure, when the speed of the air intake fan is adjusted to the maximum speed, the oxygen content in the operating environment is less than a first threshold value, and / or the hydrogen content is less than a second threshold value, a UAV temperature and humidity alarm message is generated, the UAV temperature and humidity alarm message is sent to the terminal, and the UAV is controlled to stop running.

[0047] In some embodiments of the present disclosure, the fixed-wing UAV may also include a lithium battery. When the speed of the air intake fan is adjusted to the maximum speed, the oxygen content in the operating environment is less than the first threshold value, and / or the hydrogen content is less than the second threshold value, a UAV temperature and humidity alarm message is generated and sent to the terminal, and the fuel cell is controlled to stop supplying power to the fixed-wing UAV, and the lithium battery is controlled to supply power to the fixed-wing UAV.

[0048] Step 104: adjusting the speed of the cooling fan and the exhaust interval of the exhaust valve according to the temperature information and the humidity information.

[0049] In one possible implementation, a mapping relationship between pre-established temperature information, humidity information, the speed of the cooling fan, and the exhaust interval of the exhaust valve can be obtained. The mapping relationship can be obtained in advance through historical drone data, or it can be obtained after multiple tests. Based on the mapping relationship, the target speed of the cooling fan and the target exhaust interval of the exhaust valve corresponding to the temperature information and humidity information can be determined (or it can also be the adjustment change of the speed of the cooling fan and the adjustment change of the exhaust interval of the exhaust valve). According to the mapping relationship and the temperature information and humidity information, the target speed of the cooling fan and the target exhaust interval of the exhaust valve are determined. The speed of the cooling fan is adjusted according to the target speed, and the exhaust interval of the exhaust valve is adjusted according to the target exhaust interval, so as to achieve the effect of adjusting the temperature and humidity of the fuel cell operating environment.

[0050] In another possible implementation, the speed of the cooling fan can be PID controlled according to the first difference between the temperature information and the preset temperature threshold, and the exhaust interval of the exhaust valve can be PID controlled according to the second difference between the humidity information and the preset humidity threshold. By PID controlling the speed of the cooling fan and the exhaust interval of the exhaust valve, the temperature and humidity in the operating environment are made close to the preset temperature threshold and the preset humidity threshold, respectively, so that the temperature and humidity in the operating environment are more suitable for the operation of the fuel cell, which can improve the performance of the fuel cell.

[0051] In another possible implementation, a corresponding adjustment strategy can be determined based on the temperature information and the humidity information, and the speed of the cooling fan and the exhaust interval of the exhaust valve can be controlled based on the adjustment strategy. When the temperature information is greater than the maximum temperature value in the normal temperature range, and the humidity information is greater than or equal to the maximum humidity value in the normal humidity range, it is determined that the operating environment is in a high temperature and high humidity state, and the speed of the cooling fan is increased according to the speed adjustment step, and the exhaust interval of the exhaust valve is reduced according to the interval adjustment step, until the temperature information is in the normal temperature range, and the humidity information is in the normal humidity range; or,

[0052] When the temperature information is greater than the maximum temperature value in the normal temperature range, and the humidity information is less than the minimum humidity value in the normal humidity range, it is determined that the operating environment is in a high temperature and low humidity state, and the speed of the cooling fan is increased according to the speed adjustment step, and the exhaust interval of the exhaust valve is increased according to the interval adjustment step until the temperature information is in the normal temperature range and the humidity information is in the normal humidity range; or,

[0053] When the temperature information is less than the minimum temperature value in the normal temperature range, and the humidity information is greater than the maximum humidity value in the normal humidity range, it is determined that the operating environment is in a low temperature and high humidity state, and the speed of the cooling fan is reduced according to the speed adjustment step, and the exhaust interval of the exhaust valve is reduced according to the interval adjustment step until the temperature information is in the normal temperature range and the humidity information is in the normal humidity range; or,

[0054] When the temperature information is lower than the minimum temperature value in the normal temperature range, and the humidity information is lower than the minimum humidity value in the normal humidity range, it is determined that the operating environment is in a low temperature and low humidity state. The speed of the cooling fan is reduced according to the speed adjustment step, and the exhaust interval of the exhaust valve is increased according to the interval adjustment step until the temperature information is in the normal temperature range and the humidity information is in the normal humidity range.

[0055] Optionally, the environmental treatment method for a fuel cell for a fixed-wing UAV described in this embodiment may be implemented after the UAV is powered on and the fuel cell is started.

[0056] By implementing the disclosed embodiments, the oxygen content, hydrogen content, temperature and humidity of the fuel cell operating environment in the drone can be monitored in a timely manner. When the oxygen content is too low, the oxygen content is maintained within a normal range by controlling the speed of the air intake fan to support the normal operation of the fuel cell. For different temperature and humidity environments, the speed of the cooling fan and the exhaust interval of the exhaust valve are controlled accordingly, so that the temperature and humidity in the operating environment are more suitable for the operation of the fuel cell, thereby improving the performance and life of the drone fuel cell and reducing battery loss.

[0057] Figure 3 This is a schematic diagram of an environmental treatment device for a fuel cell for a fixed-wing UAV provided in an embodiment of the present disclosure. The fixed-wing UAV can refer to the aforementioned Figure 2 The embodiments shown are not described in detail here. Figure 3 As shown, the environment treatment device for the fuel cell of the fixed-wing UAV includes: a determination module 301 , a first adjustment module 302 , an acquisition module 303 and a second adjustment module 304 .

[0058] The determination module 301 is used to determine the oxygen content and hydrogen content in the operating environment of the closed fuel cell.

[0059] The first regulating module 302 is configured to adjust the speed of the air intake fan to a maximum speed in response to the oxygen content being less than a first threshold and the hydrogen content being greater than or equal to a second threshold.

[0060] The acquisition module 303 is used to acquire temperature information and humidity information of the operating environment in response to the oxygen content in the operating environment being greater than or equal to the first threshold after the rotation speed of the air inlet fan is adjusted.

[0061] The second adjustment module 304 is used to adjust the rotation speed of the cooling fan and the exhaust interval of the exhaust valve according to the temperature information and the humidity information.

[0062] In some embodiments of the present disclosure, the second adjustment module 304 is specifically used to: obtain a pre-established mapping relationship between temperature information, humidity information and the rotation speed of the cooling fan, and the exhaust interval of the exhaust valve; determine the target rotation speed of the cooling fan and the target exhaust interval of the exhaust valve according to the mapping relationship and the temperature information and humidity information; adjust the rotation speed of the cooling fan according to the target rotation speed, and adjust the exhaust interval of the exhaust valve according to the target exhaust interval.

[0063] In some embodiments of the present disclosure, the second adjustment module 304 is specifically used to: perform PID control on the speed of the cooling fan according to the first difference between the temperature information and the preset temperature threshold, and perform PID control on the exhaust interval of the exhaust valve according to the second difference between the humidity information and the preset humidity threshold.

[0064] In some embodiments of the present disclosure, the second adjustment module 304 is specifically used to: in response to the temperature information being greater than the maximum temperature value in the normal temperature interval and the humidity information being greater than or equal to the maximum humidity value in the normal humidity interval, increase the speed of the cooling fan according to the speed adjustment step, and reduce the exhaust interval of the exhaust valve according to the interval adjustment step until the temperature information is in the normal temperature interval and the humidity information is in the normal humidity interval; or, in response to the temperature information being greater than the maximum temperature value in the normal temperature interval and the humidity information being less than the minimum humidity value in the normal humidity interval, increase the speed of the cooling fan according to the speed adjustment step, and increase the exhaust interval of the exhaust valve according to the interval adjustment step until the temperature information is in the normal temperature interval, The humidity information is in the normal humidity range; or, in response to the temperature information being less than the minimum temperature value in the normal temperature range and the humidity information being greater than the maximum humidity value in the normal humidity range, the speed of the cooling fan is reduced according to the speed adjustment step, and the exhaust interval of the exhaust valve is reduced according to the interval adjustment step, until the temperature information is in the normal temperature range and the humidity information is in the normal humidity range; or, in response to the temperature information being less than the minimum temperature value in the normal temperature range and the humidity information being less than the minimum humidity value in the normal humidity range, the speed of the cooling fan is reduced according to the speed adjustment step, and the exhaust interval of the exhaust valve is increased according to the interval adjustment step, until the temperature information is in the normal temperature range and the humidity information is in the normal humidity range.

[0065] In some embodiments of the present disclosure, Figure 3 Based on the shown embodiment, the environmental treatment device of the fuel cell for the fixed-wing UAV may also include an alarm module for generating UAV temperature and humidity alarm information when the oxygen content in the operating environment is less than a first threshold value and / or the hydrogen content is less than a second threshold value after adjusting the speed of the air intake fan, and sending the UAV temperature and humidity alarm information to the terminal, as well as controlling the UAV to stop running.

[0066] In some embodiments of the present disclosure, Figure 3 On the basis of the shown embodiment, the environmental treatment device of the fuel cell for the fixed-wing UAV may also include a control module, which is used to generate and send UAV temperature and humidity alarm information to the terminal after adjusting the speed of the air intake fan when the oxygen content in the operating environment is less than a first threshold value and / or the hydrogen content is less than a second threshold value, and control the fuel cell to stop powering the fixed-wing UAV and control the lithium battery to power the fixed-wing UAV.

[0067] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0068] In addition, the disclosed embodiment also proposes a fixed-wing UAV, including: a closed fuel cell, a cooling fan, an exhaust valve, an air intake fan and a fuel cell controller. The structure of the fixed-wing UAV can be referred to Figure 2 The embodiments are not described in detail here.

[0069] The fuel cell controller is used to implement the environmental treatment method for a fuel cell for a fixed-wing UAV provided in any of the aforementioned embodiments. Figure 4 Schematic diagram of a fuel cell controller provided by an embodiment of the present disclosure. Figure 4 As shown, the fuel cell controller may include: a power module, a microcontroller module, a signal input module, a signal output module, a storage module and a communication module. The power module is composed of a diode module 7, a power conversion circuit 8, and a power output circuit 9; the microcontroller module is composed of an ARM Cortex-M microcontroller and a peripheral circuit 1; the digital input module is composed of a digital input 2 and an analog input module 3; the signal output module is composed of a digital output module 4 and a PWM output module 5; the storage module 6 is composed of a storage chip and a peripheral circuit; the communication module is composed of a CAN communication module 10 and a wireless communication module 11.

[0070] The diode module 7 in the power module is used to prevent the output current of the fuel cell 20 (i.e., the closed fuel cell in the present disclosure) from flowing back to the lithium battery 21, and the output current of the lithium battery from flowing back to the fuel cell. The diode is a Schottky diode with a reverse withstand voltage of 100V, a current resistance of 20A, a forward voltage drop of 0.85V@10A, and an operating temperature of 150°C. The lithium battery provides a backup power supply. When the hydrogen fuel cell is running, the controller and the UAV electric adjustment motor automatically switch to the full power supply mode of the fuel cell, so that the power supply can be used immediately and the energy utilization rate is improved. The power conversion circuit 8 and the power output circuit 9 realize the conversion of the wide voltage 18-75V into the DC3.3V, DC5V, and DC24V required by the system to supply power to each module. It is composed of a 24V power chip and a filter circuit, a 5V power chip and a filter circuit, and a 3.3V power chip and a filter circuit. The 18-75V voltage is first converted to 24V using the input-output isolated power supply URF48, which has a power of 200W and a conversion efficiency of up to 91%, improving the safety of the power supply. It is then converted from 24V to 5V, and 5V to 3.3V, to power the ARM Cortex-M microcontroller chips and the cooling fan.

[0071] The microcontroller module 1 includes an ARM Cortex-M microcontroller chip and a peripheral circuit 1. The main control chip ARM Cortex-M adopts the STM32F407 series single-chip microcomputer, and the peripheral circuit mainly includes a power supply circuit, a filter circuit, a crystal oscillator circuit, and a reset circuit.

[0072] The signal input module includes a digital quantity input module 2, which is composed of a photoelectric coupling input circuit and a filtering circuit, to realize the isolated collection of the digital quantity signal module 22, to collect the switch control signal, and the main control chip to realize the start-up, operation and stop logic of the fuel cell. Collect the cooling fan PWM signal, and monitor the cooling fan speed and whether it is blocked, disconnected, etc. in real time; the signal input module also includes an analog quantity input module 3. It is composed of a voltage conditioning circuit, an operational amplifier follower circuit, an AD conversion circuit and a filtering circuit, and the AD acquisition chip uses AD7091. Realize the collection of sensor signals 23, and monitor the status of the fuel cell based on the collected information such as the stack temperature, battery temperature, stack voltage, and stack current.

[0073] The signal output module includes a digital output module 4, which is composed of a MOS tube chip FDS8949 and a filter circuit, with a drain-source voltage (Vdss) of 40V, a continuous drain current (Id) of 6A, and an on-resistance of 29mΩ, realizing the output of digital quantities and used to drive the electromagnetic valve. The PWM output module 5 is composed of a field effect tube AO3400A and a filter circuit, with a drain-source voltage (Vdss) of 30V, a continuous drain current (Id) of 5.7A, and an on-resistance of 26.5mΩ. The PWM wave amplitude can be selected through a jumper cap, and 3.3V, 5V, and 24V can be selected to realize the control signal PWM wave output, which is used to drive a cooling fan with multiple control signals.

[0074] The storage module 6 is composed of a FLASH chip circuit and an EEPROM chip circuit, and realizes the storage of battery stack operating parameters such as voltage, current, temperature, pressure, etc., as well as battery stack setting parameters, such as the set operating temperature, alarm threshold, PID algorithm parameters, etc.

[0075] The communication module includes a CAN communication module 10, which is composed of a dual-channel CAN transceiver TJA1051 and peripheral circuits to achieve real-time communication with the module 24. The CAN device has a hydrogen concentration sensor for detecting the hydrogen concentration in the cabin to ensure the safety of the drone. The oxygen content sensor is used to detect the oxygen content of the air in the cabin to protect the safety of the hydrogen fuel cell. The temperature and humidity detector is used to collect the temperature information and humidity information of the fuel cell operating environment in the cabin. The RS232 wireless communication module 11 is composed of a dual-channel RS232 transceiver MAX3232 and a wireless transmission module to achieve remote communication with the host computer. It is used to interact with the fuel cell information, obtain the operating status and parameters of the fuel cell, send instructions to the fuel cell, control the operation of the fuel cell to stop and reset, etc. The main control chip executes the environmental treatment method for the fuel cell for the fixed-wing drone described in any of the above embodiments according to the collected environmental temperature information, humidity information, oxygen content and hydrogen content, drives the digital output circuit 4 and the PWM output circuit 5, respectively controls the exhaust valve, the cooling fan and the air intake fan, and realizes the environmental control of the fuel cell stack.

[0076] The fuel cell controller device is simple and easy to operate, has a reasonable layout, can effectively detect the operating state of the fuel cell, and improve the service life of the fuel cell.

[0077] Optionally, in some embodiments of the present disclosure, Figure 2 As shown, the fixed-wing UAV may further include an air inlet cover 8. The air inlet cover is arranged outside the fixed-wing UAV, and a vent hole is left between the air inlet cover and the fuselage of the fixed-wing UAV. By arranging the air inlet cover 8 outside the fuselage of the UAV, the air intake volume of the UAV can be increased when flying at high speed, the oxygen content can be increased, and the lack of oxygen, low pressure and the like can be avoided to a certain extent.

[0078] Optionally, in some embodiments of the present disclosure, the fixed-wing drone is Figure 2 The embodiment may further include a lithium battery (not shown in the figure). When the hydrogen content and the oxygen content are too low, the power supply of the fuel cell may be switched to the power supply of the lithium battery.

[0079] In another implementation, after the hydrogen fuel cell is running, the output of the fuel cell is used as the power source of the UAV, and the fuel cell is in full power mode. An ideal diode with low power consumption is used, and there is no need to write a control algorithm to give priority to the use of fuel cells for power supply. When the UAV starts and accelerates, it requires a large amount of power. Since the power density of the fuel cell is not as high as that of the lithium battery, the power of the fuel cell is insufficient at this time, and the voltage is lower than the voltage of the lithium battery. At this time, the lithium battery is automatically used for power supply. In the cruising stage of the UAV, the power demand is low, and the power of the fuel cell is sufficient. At this time, the fuel cell is used for power supply. Since the energy density of the fuel cell is higher than that of the lithium battery, the endurance time can be increased.

[0080] In order to implement the above embodiments, the present disclosure also proposes an electronic device, including: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method provided by the above embodiments.

[0081] In order to implement the above embodiments, the present disclosure further proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0082] In order to implement the above embodiments, the present disclosure also proposes a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0083] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0084] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0085] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present disclosure includes additional implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present disclosure belong.

[0086] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0087] It should be understood that the various parts of the present disclosure can be implemented in hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0088] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0089] In addition, each functional unit in each embodiment of the present disclosure may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0090] The storage medium mentioned above may be a read-only memory, a disk or an optical disk, etc. Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present disclosure. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present disclosure.

Claims

1. A method for treating the environment of a fuel cell for a fixed-wing unmanned aerial vehicle, characterized in that: The fixed-wing UAV includes a closed fuel cell, a cooling fan, an exhaust valve, and an air intake fan; and the method includes: determining the oxygen content and the hydrogen content in the operating environment of the closed fuel cell; In response to the oxygen content being less than a first threshold value and the hydrogen content being greater than or equal to a second threshold value, adjusting the speed of the air intake fan to a maximum speed; In response to the oxygen content in the operating environment being greater than or equal to the first threshold after the speed of the air intake fan is adjusted, acquiring temperature information and humidity information of the operating environment; The rotation speed of the cooling fan and the exhaust interval of the exhaust valve are adjusted according to the temperature information and the humidity information.

2. The method according to claim 1, characterized in that The adjusting the rotation speed of the cooling fan and the exhaust interval of the exhaust valve according to the temperature information and the humidity information comprises: Acquire the pre-established mapping relationship between temperature information, humidity information, the rotation speed of the cooling fan, and the exhaust interval of the exhaust valve; Determining a target rotation speed of the cooling fan and a target exhaust interval of the exhaust valve according to the mapping relationship, the temperature information, and the humidity information; The rotation speed of the cooling fan is adjusted according to the target rotation speed, and the exhaust interval of the exhaust valve is adjusted according to the target exhaust interval.

3. The method according to claim 1, characterized in that The adjusting the rotation speed of the cooling fan and the exhaust interval of the exhaust valve according to the temperature information and the humidity information comprises: The rotation speed of the cooling fan is PID controlled according to a first difference between the temperature information and a preset temperature threshold, and the exhaust interval of the exhaust valve is PID controlled according to a second difference between the humidity information and a preset humidity threshold.

4. The method according to claim 1, characterized in that: The adjusting the rotation speed of the cooling fan and the exhaust interval of the exhaust valve according to the temperature information and the humidity information comprises: In response to the temperature information being greater than a maximum temperature value in a normal temperature interval, and the humidity information being greater than or equal to a maximum humidity value in a normal humidity interval, increasing the speed of the cooling fan according to a speed adjustment step, and reducing the exhaust interval of the exhaust valve according to an interval adjustment step, until the temperature information is in the normal temperature interval, and the humidity information is in the normal humidity interval; or, In response to the temperature information being greater than the maximum temperature value in the normal temperature interval, and the humidity information being less than the minimum humidity value in the normal humidity interval, the speed of the cooling fan is increased according to the speed adjustment step, and the exhaust interval of the exhaust valve is increased according to the interval adjustment step, until the temperature information is in the normal temperature interval, and the humidity information is in the normal humidity interval; or, In response to the temperature information being less than the minimum temperature value in the normal temperature interval and the humidity information being greater than the maximum humidity value in the normal humidity interval, the speed of the cooling fan is reduced according to the speed adjustment step, and the exhaust interval of the exhaust valve is reduced according to the interval adjustment step, until the temperature information is in the normal temperature interval and the humidity information is in the normal humidity interval; or, In response to the temperature information being less than the minimum temperature value in the normal temperature range and the humidity information being less than the minimum humidity value in the normal humidity range, the speed of the cooling fan is reduced according to the speed adjustment step, and the exhaust interval of the exhaust valve is increased according to the interval adjustment step until the temperature information is in the normal temperature range and the humidity information is in the normal humidity range.

5. The method according to claim 1, characterized in that The method further comprises: In response to the oxygen content in the operating environment being less than the first threshold value, and / or the hydrogen content being less than the second threshold value after adjusting the rotation speed of the air intake fan, a drone temperature and humidity alarm message is generated, the drone temperature and humidity alarm message is sent to the terminal, and the drone is controlled to stop running.

6. The method according to claim 1, characterized in that The fixed-wing UAV further comprises: a lithium battery; and the method further comprises: In response to the oxygen content in the operating environment being less than the first threshold value, and / or the hydrogen content being less than the second threshold value after adjusting the rotation speed of the air intake fan, a drone temperature and humidity alarm message is generated and sent to the terminal, and the fuel cell is controlled to stop supplying power to the fixed-wing drone, and the lithium battery is controlled to supply power to the fixed-wing drone.

7. An environmental treatment device for a fuel cell used in a fixed-wing UAV, characterized in that: The fixed-wing UAV includes a closed fuel cell, a cooling fan, an exhaust valve, and an air intake fan; the device includes: A determination module, used to determine the oxygen content and hydrogen content in the operating environment of the closed fuel cell; a first regulating module, configured to adjust the speed of the air intake fan to a maximum speed in response to the oxygen content being less than a first threshold and the hydrogen content being greater than or equal to a second threshold; an acquisition module, configured to acquire temperature information and humidity information of the operating environment in response to the oxygen content in the operating environment being greater than or equal to the first threshold after the rotation speed of the air inlet fan is adjusted; The second regulating module is used to regulate the rotation speed of the cooling fan and the exhaust interval of the exhaust valve according to the temperature information and the humidity information.

8. A fixed-wing UAV, characterized in that: include: Closed fuel cell, cooling fan, exhaust valve, air intake fan and fuel cell controller; The fuel cell controller is used to implement the method according to any one of claims 1-6.

9. The fixed-wing UAV according to claim 8, characterized in that: Also includes: Air intake hood; The air inlet cover is arranged outside the fixed-wing UAV, and a vent hole is left between the air inlet cover and the fuselage of the fixed-wing UAV.

10. The fixed-wing UAV according to claim 8, characterized in that: Also includes: Lithium battery.

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