An aluminum air fuel cell system

Abstract

The application discloses an aluminum air fuel cell system and relates to the technical field of fuel cells, which comprises a radiator, a cooling pump, a cooling fan, an electrolyte tank, a washing liquid tank, a main pump, a plurality of parallel battery reactor branches and a heat exchanger connected with one end of each battery reactor branch, each heat exchanger is connected with the radiator, and the other end of each battery reactor branch is connected with the main pump; one end of the cooling pump is connected with the radiator, and the other end of the cooling pump is connected with each heat exchanger; the main pump is used for injecting electrolyte in the electrolyte tank or washing liquid in the washing liquid tank into each battery reactor branch; and the cooling fan is used for dissipating heat for the radiator. The application can reduce the failure rate of the aluminum air fuel cell.

Description

Technical Field

[0001] This application relates to the field of fuel cell technology, and in particular to an aluminum-air fuel cell system. Background Technology

[0002] An aluminum-air fuel cell is a high-energy chemical power source that uses an aluminum alloy as the negative electrode, an air electrode as the positive electrode, and a neutral or alkaline aqueous solution as the electrolyte. During operation, the battery outputs electrical energy by consuming the aluminum alloy negative electrode and oxygen from the air.

[0003] Currently, aluminum-air fuel cells suffer from problems such as high heat generation and high failure rate. Summary of the Invention

[0004] The purpose of this application is to provide an aluminum-air fuel cell system that can reduce the failure rate of aluminum-air fuel cells.

[0005] To achieve the above objectives, this application provides the following solution: This application provides an aluminum-air fuel cell system, comprising: a radiator, a cooling pump, a cooling fan, an electrolyte tank, a washing liquid tank, a main pump, multiple parallel fuel cell reactor branches, and heat exchangers connected to one end of each of the fuel cell reactor branches. Each heat exchanger is connected to the radiator, and the other end of each fuel cell reactor branch is connected to the main pump. One end of the cooling pump is connected to the radiator, and the other end of the cooling pump is connected to each of the heat exchangers. The main pump is used to inject the electrolyte in the electrolyte tank or the cleaning solution in the washing solution tank into each battery reactor branch. The cooling fan is used to dissipate heat from the radiator.

[0006] Optionally, the electrolyte tank is equipped with an electrolyte tank level gauge, a heating rod, and an electrolyte temperature sensor. The standby state of the aluminum-air fuel cell system meets the following conditions: the liquid level value of the electrolyte tank level gauge is higher than the set working liquid level, and the main pump and the cooling pump report no faults. When the aluminum-air fuel cell system is in standby mode, if the temperature collected by the electrolyte temperature sensor is lower than the first set temperature, the heating rod is controlled to start working; if the temperature collected by the electrolyte temperature sensor is higher than the second set temperature, the heating rod is controlled to stop working.

[0007] Optionally, the aluminum-air fuel cell system further includes temperature sensors disposed at the outlet of each of the heat exchangers, each of the temperature sensors being used to collect the temperature at the outlet of the corresponding heat exchanger.

[0008] Optionally, the aluminum-air fuel cell system further includes a controller and a battery management system, wherein the battery management system, each of the temperature sensors, the main pump, and the cooling pump are all connected to the controller; The battery management system is used to collect relevant data of each battery reactor in the battery reactor branch in real time, including voltage. When the aluminum-air fuel cell system is in operation: The controller is used to control the aluminum-air fuel cell system to perform load discharge when the minimum voltage of each battery reactor in each of the battery reactor branches is greater than the voltage threshold. The controller is also configured to, under normal conditions of the electrolyte temperature sensor, control the cooling pump to start running if the temperature collected by the electrolyte temperature sensor is higher than a third set temperature; and control the cooling fan to start running if the temperature collected by the electrolyte temperature sensor is higher than a fourth set temperature. The controller is also configured to, under the condition of electrolyte temperature sensor failure, control the cooling pump to start running if the highest temperature value among the temperature sensors is higher than a third set temperature; and control the cooling fan to start running if the highest temperature value among the temperature sensors is higher than a fourth set temperature. The controller is also configured to stop the cooling pump and the cooling fan when the electrolyte temperature sensor and the highest temperature value among the temperature sensors are lower than the fifth set temperature.

[0009] Optionally, the aluminum-air fuel cell system further includes a cloud platform, which is connected to the battery management platform, and the relevant data includes: current, power, running time, output power, remaining capacity, and discharge curve.

[0010] Optionally, the aluminum-air fuel cell system shall be shut down normally when the parallel battery reactor branch reaches the discharge capacity or the discharge duration. If the aluminum-air fuel cell system experiences a main pump failure, an electrolyte tank temperature higher than the sixth set temperature, a maximum voltage of each battery reactor in each battery reactor branch lower than the first set voltage, a maximum voltage of each battery reactor in each battery reactor branch higher than the second set voltage, leakage in a battery reactor branch, or a hydrogen concentration exceeding a preset hydrogen concentration during operation, a fault shutdown will be initiated.

[0011] Optionally, the aluminum-air fuel cell system further includes a leak detector installed in each of the battery reactor branches; the leak detector is used to detect whether a leak has occurred in the battery reactor on the corresponding battery reactor branch.

[0012] Optionally, the aluminum-air fuel cell system further includes a hydrogen concentration sensor, which is used to detect the hydrogen concentration in the space where each fuel cell reactor branch is located.

[0013] Optionally, the aluminum-air fuel cell system further includes an inlet three-way valve and a return three-way valve; The first inlet of the liquid inlet three-way valve is connected to the electrolyte tank, the second inlet of the liquid inlet three-way valve is connected to the washing liquid tank, and the outlet of the liquid inlet three-way valve is connected to the main pump; The inlet of the return liquid three-way valve is connected to the outlet of each of the heat exchangers, the first outlet of the return liquid three-way valve is connected to the electrolyte tank, and the second outlet of the return liquid three-way valve is connected to the washing liquid tank.

[0014] Optionally, the aluminum-air fuel cell system enters a cleaning mode after a first set time period of normal shutdown; The cleaning mode involves adjusting the inlet three-way valve and the return three-way valve to the washing liquid tank side, starting the main pump, running for a second set time period, and then stopping. After the main pump stops, wait for a third set time period before adjusting the inlet three-way valve and the return three-way valve to the electrolyte tank side.

[0015] According to the specific embodiments provided in this application, the following technical effects are disclosed: This application provides an aluminum-air fuel cell system that uses a radiator, cooling pump, and cooling fan for systematic heat dissipation to improve heat dissipation efficiency. An electrolyte tank provides centralized electrolyte supply to each fuel cell reactor branch, improving electrolyte supply efficiency. In addition, a washing tank cleans the entire system to reduce the impact of electrolyte residue on secondary discharge. In summary, this application reduces the failure rate by improving heat dissipation efficiency, improving electrolyte supply efficiency, and timely washing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an aluminum-air fuel cell system provided in one embodiment of this application.

[0018] Reference numerals: P1-Main pump, P2-Cooling pump, F1-Inlet three-way valve, F2-Return three-way valve, FS1-First oxygen supply fan unit, FS2-Second oxygen supply fan unit, FS3-Third oxygen supply fan unit, FS4-Top cooling fan, FS5-Cooling fan, H-Heating rod, L1-Electrolyte tank level gauge, L2-Washing solution tank level gauge, HC-Hydrogen concentration sensor, Y-Pipeline pressure sensor, T1-First temperature sensor, T2-Second temperature sensor, T3-Third temperature sensor, T4-Electrolyte temperature sensor, T5-Ambient temperature sensor, LY1-First leak detector, LY2-Second leak detector, LY3-Third leak detector. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] This application provides an aluminum-air fuel cell system, such as Figure 1 As shown, the aluminum-air fuel cell system includes: a radiator, a cooling pump P2, a cooling fan FS5, an electrolyte tank, a washing liquid tank, a main pump P1, multiple parallel fuel cell reactor branches, and heat exchangers connected to one end of each of the fuel cell reactor branches. Each heat exchanger is connected to the radiator, and the other end of each fuel cell reactor branch is connected to the main pump P1. One end of the cooling pump P2 is connected to the radiator, and the other end of the cooling pump P2 is connected to each of the heat exchangers.

[0022] The main pump P1 is used to inject the electrolyte in the electrolyte tank or the cleaning solution in the washing solution tank into each battery reactor branch.

[0023] The cooling fan FS5 is used to dissipate heat from the radiator.

[0024] This application utilizes a radiator, cooling pump P2, and cooling fan FS5 for systematic heat dissipation, thereby improving heat dissipation efficiency. An electrolyte tank provides centralized electrolyte supply to each battery reactor branch, improving supply efficiency. Furthermore, a washing tank cleans the entire system, reducing the impact of residual electrolyte on secondary discharge. In summary, this application reduces the failure rate by improving heat dissipation efficiency, increasing electrolyte supply efficiency, and providing timely washing.

[0025] In an exemplary embodiment, the multiple parallel battery reactor branches specifically refer to three parallel battery reactor branches. Each battery reactor branch includes three battery reactors (piles) connected in series. Pipe 1, pile 2, and pile 3 are connected in series to form a first battery reactor branch; pile 4, pile 5, and pile 6 are connected in series to form a second battery reactor branch; and pile 7, pile 8, and pile 9 are connected in series to form a third battery reactor branch. Figure 1 As shown. Figure 1 The names, symbols, and functions of the components are shown in Table 1.

[0026] Table 1 Information on each device

[0027] The radiator is spatially isolated from each heat exchanger. For example, the cooling pump P2, electrolyte tank, washing tank, main pump P1, multiple parallel battery reactor branches and heat exchangers are located indoors, while the radiator is located outdoors. After spatial isolation, the radiator draws in ambient cold air, improving heat exchange efficiency.

[0028] The interior also includes a top-mounted cooling fan FS4. Each battery reactor branch is equipped with an oxygen supply fan unit, with the first, second, and third battery reactor branches respectively equipped with a first oxygen supply fan unit FS1, a second oxygen supply fan unit FS2, and a third oxygen supply fan unit FS3.

[0029] In one exemplary embodiment, the electrolyte tank is equipped with an electrolyte tank level gauge L1, a heating rod H, and an electrolyte temperature sensor T4. The electrolyte tank level gauge L1 is used to detect the electrolyte tank level.

[0030] The washing solution tank is equipped with a washing solution tank level gauge L2, which is used to detect the liquid level in the washing solution tank.

[0031] In an exemplary embodiment, the aluminum-air fuel cell system further includes a leak detector disposed in each of the battery reactor branches; the leak detector is used to detect whether a leak has occurred in the battery reactor on the corresponding battery reactor branch.

[0032] The leak detectors include a first leak detector LY1 installed on the first battery reactor branch, a second leak detector LY2 installed on the second battery reactor branch, and a second leak detector LY3 installed on the third battery reactor branch. A specific application scenario involves placing each battery reactor branch into a separate container, with each container equipped with a leak detector.

[0033] In one exemplary embodiment, the aluminum-air fuel cell system further includes a hydrogen concentration sensor HC, which is used to detect the hydrogen concentration in the space where each fuel cell reactor branch is located.

[0034] In one exemplary embodiment, the aluminum-air fuel cell system further includes an inlet three-way valve F1 and a return three-way valve F2. Both the inlet three-way valve F1 and the return three-way valve F2 are electrically operated three-way valves.

[0035] The first inlet of the liquid inlet three-way valve F1 is connected to the electrolyte tank, the second inlet of the liquid inlet three-way valve F1 is connected to the washing liquid tank, and the outlet of the liquid inlet three-way valve F1 is connected to the main pump P1.

[0036] The inlet of the return liquid three-way valve F2 is connected to the outlet of each of the heat exchangers, the first outlet of the return liquid three-way valve F2 is connected to the electrolyte tank, and the second outlet of the return liquid three-way valve F2 is connected to the washing liquid tank.

[0037] In one exemplary embodiment, the aluminum-air fuel cell system further includes temperature sensors disposed at the outlets of each of the heat exchangers, each temperature sensor being used to collect the temperature at the outlet of the corresponding heat exchanger.

[0038] In an exemplary embodiment, the aluminum-air fuel cell system further includes a controller and a battery management system, wherein the battery management system, each of the temperature sensors, the main pump P1, and the cooling pump P2 are all connected to the controller.

[0039] The battery management system is used to collect relevant data of each battery reactor in the battery reactor branch in real time, including voltage.

[0040] In an exemplary embodiment, the standby state of the aluminum-air fuel cell system satisfies the following conditions: the liquid level value of the electrolyte tank level gauge L1 is higher than the set working liquid level, and the main pump P1 and the cooling pump P2 report no faults.

[0041] The working liquid level is set to the average of the electrolyte tank level and the washing liquid tank level (the midpoint between the electrolyte tank level gauge L1 and the washing liquid tank level gauge L2).

[0042] In standby mode, the inlet three-way valve F1 and the return three-way valve F2 are located on the electrolyte tank pipeline side, and the relevant sensors detect no abnormalities.

[0043] "On the side of the electrolyte tank pipeline" means that the first inlet of the liquid inlet three-way valve F1 is open and the first outlet is closed; the first outlet of the liquid return three-way valve F2 is open and the second outlet is closed.

[0044] The inlet three-way valve F1 and the return three-way valve F2 are located on the electrolyte tank pipeline side so that liquid can be supplied at any time.

[0045] Once the standby state is met, the relevant actuators do not operate, and the battery management system operates normally.

[0046] When the aluminum-air fuel cell system is in standby mode, if the temperature collected by the electrolyte temperature sensor T4 is lower than the first set temperature, the heating rod H is controlled to start working; if the temperature collected by the electrolyte temperature sensor T4 is higher than the second set temperature, the heating rod H is controlled to stop working.

[0047] The first set temperature is 15℃, and the second set temperature is 20℃.

[0048] In one exemplary embodiment, if the battery management system has no other faults in the standby state, then the battery management system is satisfied.

[0049] The aluminum-air fuel cell system in this application also includes an ambient temperature sensor T5, used to collect ambient temperature data. Excessively high ambient temperatures can cause the battery's operating temperature to rise too high, potentially leading to system malfunction. When the ambient temperature exceeds a certain threshold, the system can reduce power output or stop operating based on the exceeded value.

[0050] The specific steps for starting an aluminum-air fuel cell system are as follows: (1) Confirm that the inlet three-way valve F1 and the return three-way valve F2 are turned to the electrolyte tank side; (2) Start the first oxygen supply fan unit FS1, the second oxygen supply fan unit FS2 and the third oxygen supply fan unit FS3; (3) Start the main pump P1.

[0051] After completing the above steps, the aluminum-air fuel cell system will start working.

[0052] After the aluminum-air fuel cell system is started, the system enters the operating state, monitoring the temperature, stack voltage, and pipeline pressure at various points.

[0053] When the aluminum-air fuel cell system is running, the controller has the following four functions.

[0054] 1) The controller is used to close the output contactor and control the aluminum-air fuel cell system to discharge under load when the minimum voltage of each battery reactor in each battery reactor branch is greater than the voltage threshold.

[0055] The voltage threshold is 36V DC.

[0056] 2) The controller is also used to control the cooling pump P2 to start running when the temperature collected by the electrolyte temperature sensor T4 is higher than the third set temperature under normal conditions; and to control the cooling fan FS5 to start running when the temperature collected by the electrolyte temperature sensor T4 is higher than the fourth set temperature.

[0057] The third set temperature is 60℃, and the fourth set temperature is 63℃.

[0058] 3) The controller is also used to control the cooling pump P2 to start running when the highest temperature value among the temperature sensors is higher than the third set temperature under the condition of failure of the electrolyte temperature sensor T4; and to control the cooling fan FS5 to start running when the highest temperature value among the temperature sensors is higher than the fourth set temperature.

[0059] 4) The controller is also used to control the cooling pump P2 and the cooling fan FS5 to stop operating when the electrolyte temperature sensor T4 and the highest temperature value of each of the temperature sensors are lower than the fifth set temperature.

[0060] The fifth setting temperature is 58℃.

[0061] In one exemplary embodiment, the aluminum-air fuel cell system further includes a cloud platform connected to the battery management platform, and the relevant data includes: current, power, running time, output power, remaining capacity (electricity), and discharge curve.

[0062] The battery management system synchronously records voltage, current, power, operating time, output power, remaining capacity, and discharge curve, and synchronizes them to the cloud platform in real time for remote monitoring. In one exemplary embodiment, the aluminum-air fuel cell system shuts down normally when the parallel battery reactor branch reaches its discharge capacity or discharge duration.

[0063] If the aluminum-air fuel cell system experiences a fault in the main pump P1, the temperature inside the electrolyte tank exceeds the sixth set temperature (high temperature protection), the maximum voltage of each battery reactor in each battery reactor branch is lower than the first set voltage (undervoltage protection), the maximum voltage of each battery reactor in each battery reactor branch exceeds the second set voltage (overvoltage protection), leakage occurs in the battery reactor branch (leakage protection), or the hydrogen concentration exceeds the preset hydrogen concentration, the system will be shut down and locked. After troubleshooting, the system will be powered on again to remove the lockout.

[0064] If the pipeline pressure sensor Y detects no pressure in the pipeline, then the main pump P1 is considered faulty.

[0065] The sixth setting temperature is 80℃, the first setting voltage is 21V, and the second setting voltage is 50V.

[0066] In one exemplary embodiment, the aluminum-air fuel cell system enters a cleaning mode after a first set time period following a normal shutdown.

[0067] The cleaning mode involves adjusting the inlet three-way valve F1 and the return three-way valve F2 to the washing liquid tank side, starting the main pump P1, running for a second set time period, and then stopping. After the main pump P1 stops, wait for a third set time period, and then adjust the inlet three-way valve F1 and the return three-way valve F2 to the electrolyte tank side to complete the cleaning.

[0068] The first and second time periods are both 30 minutes, and the third time period is 10 minutes.

[0069] This application offers the following advantages for centralized electrolyte supply via an electrolyte tank: 1. The electrolyte concentration / temperature is more uniform, resulting in more stable performance.

[0070] The unified electrolyte tank provides power to multiple branches, ensuring a consistent reaction environment for each individual cell and balanced voltage and power output.

[0071] This avoids localized polarization, overheating, and efficiency loss caused by concentration differences in individual branches, resulting in a more stable overall output.

[0072] 2. The system structure is simplified, and the cost and reliability are higher.

[0073] It reduces the number of independent pumps, valves, pipelines, and sensors, resulting in high integration and fewer leakage points.

[0074] Simpler maintenance: centralized liquid replenishment, centralized filtration, and centralized temperature control, suitable for high-power modules / power plants.

[0075] 3. More efficient heat dissipation and heat removal.

[0076] The aluminum-air reaction is significantly exothermic, and a centralized electrolyte tank can provide unified cooling / heat exchange, resulting in thermal management efficiency far exceeding that of individual heat dissipation.

[0077] It effectively inhibits electrolyte deterioration and accelerated aluminum anode corrosion caused by high temperature.

[0078] 4. Facilitates electrolyte circulation, regeneration, and reuse.

[0079] Centralized liquid supply allows for easy connection to filtration, sedimentation, impurity removal, and regeneration devices.

[0080] Reaction byproducts (aluminates, etc.) can be centrally processed, extending electrolyte life and reducing operating costs.

[0081] 5. Flexible power expansion: Power can be increased simply by increasing the number of battery branches and sharing a single liquid supply system; ideal for high-power, long-duration discharge scenarios: backup power, electric vehicles, ships, and energy storage power stations.

[0082] 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.

[0083] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An aluminum-air fuel cell system, characterized in that, The aluminum-air fuel cell system includes: a radiator, a cooling pump, a cooling fan, an electrolyte tank, a washing liquid tank, a main pump, multiple parallel fuel cell reactor branches, and heat exchangers connected to one end of each of the fuel cell reactor branches. Each heat exchanger is connected to the radiator, and the other end of each fuel cell reactor branch is connected to the main pump. One end of the cooling pump is connected to the radiator, and the other end of the cooling pump is connected to each of the heat exchangers. The main pump is used to inject the electrolyte in the electrolyte tank or the cleaning solution in the washing solution tank into each battery reactor branch. The cooling fan is used to dissipate heat from the radiator.

2. The aluminum-air fuel cell system according to claim 1, characterized in that, The electrolyte tank is equipped with an electrolyte tank level gauge, a heating rod, and an electrolyte temperature sensor. The standby state of the aluminum-air fuel cell system meets the following conditions: the liquid level value of the electrolyte tank level gauge is higher than the set working liquid level, and the main pump and the cooling pump report no faults. When the aluminum-air fuel cell system is in standby mode, if the temperature collected by the electrolyte temperature sensor is lower than the first set temperature, the heating rod is controlled to start working; if the temperature collected by the electrolyte temperature sensor is higher than the second set temperature, the heating rod is controlled to stop working.

3. The aluminum-air fuel cell system according to claim 1, characterized in that, The aluminum-air fuel cell system also includes temperature sensors installed at the outlet of each of the heat exchangers, and each temperature sensor is used to collect the temperature at the outlet of the corresponding heat exchanger.

4. The aluminum-air fuel cell system according to claim 3, characterized in that, The aluminum-air fuel cell system also includes a controller and a battery management system, wherein the battery management system, each of the temperature sensors, the main pump and the cooling pump are all connected to the controller; The battery management system is used to collect relevant data of each battery reactor in the battery reactor branch in real time, including voltage. When the aluminum-air fuel cell system is in operation: The controller is used to control the aluminum-air fuel cell system to perform load discharge when the minimum voltage of each battery reactor in each of the battery reactor branches is greater than the voltage threshold. The controller is also configured to, under normal conditions of the electrolyte temperature sensor, control the cooling pump to start running if the temperature collected by the electrolyte temperature sensor is higher than a third set temperature; and control the cooling fan to start running if the temperature collected by the electrolyte temperature sensor is higher than a fourth set temperature. The controller is also configured to, under the condition of electrolyte temperature sensor failure, control the cooling pump to start running if the highest temperature value among the temperature sensors is higher than a third set temperature; and control the cooling fan to start running if the highest temperature value among the temperature sensors is higher than a fourth set temperature. The controller is also configured to stop the cooling pump and the cooling fan when the electrolyte temperature sensor and the highest temperature value among the temperature sensors are lower than the fifth set temperature.

5. The aluminum-air fuel cell system according to claim 4, characterized in that, The aluminum-air fuel cell system also includes a cloud platform, which is connected to the battery management platform. The relevant data also includes: current, power, running time, output power, remaining capacity, and discharge curve.

6. The aluminum-air fuel cell system according to claim 1, characterized in that, When the parallel battery reactor branch reaches the discharge capacity or the discharge duration, the aluminum-air fuel cell system shuts down normally. If the aluminum-air fuel cell system experiences a main pump failure, an electrolyte tank temperature higher than the sixth set temperature, a maximum voltage of each battery reactor in each battery reactor branch lower than the first set voltage, a maximum voltage of each battery reactor in each battery reactor branch higher than the second set voltage, leakage in a battery reactor branch, or a hydrogen concentration exceeding a preset hydrogen concentration during operation, a fault shutdown will be initiated.

7. The aluminum-air fuel cell system according to claim 1, characterized in that, The aluminum-air fuel cell system also includes a leak detector installed in each of the battery reactor branches; the leak detector is used to detect whether a leak has occurred in the battery reactor on the corresponding battery reactor branch.

8. The aluminum-air fuel cell system according to claim 1, characterized in that, The aluminum-air fuel cell system also includes a hydrogen concentration sensor, which is used to detect the hydrogen concentration in the space where each fuel cell reactor branch is located.

9. The aluminum-air fuel cell system according to claim 1, characterized in that, The aluminum-air fuel cell system also includes an inlet three-way valve and a return three-way valve; The first inlet of the liquid inlet three-way valve is connected to the electrolyte tank, the second inlet of the liquid inlet three-way valve is connected to the washing liquid tank, and the outlet of the liquid inlet three-way valve is connected to the main pump; The inlet of the return liquid three-way valve is connected to the outlet of each of the heat exchangers, the first outlet of the return liquid three-way valve is connected to the electrolyte tank, and the second outlet of the return liquid three-way valve is connected to the washing liquid tank.

10. The aluminum-air fuel cell system according to claim 9, characterized in that, The aluminum-air fuel cell system enters cleaning mode after a normal shutdown for a first set period of time. The cleaning mode involves adjusting the inlet three-way valve and the return three-way valve to the washing liquid tank side, starting the main pump, running for a second set time period, and then stopping. After the main pump stops, wait for a third set time period before adjusting the inlet three-way valve and the return three-way valve to the electrolyte tank side.

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