Air compression system, control method, fuel cell vehicle, and storage medium

Abstract

The application discloses an air compression system, a control method, a fuel cell vehicle and a storage medium, and relates to the technical field of fuel cell vehicles but is not limited thereto. When a fuel cell air compressor fails, a control device controls a second passage to be turned on, so that the brake air compressor can output air to the stack through the second passage, so that the stack can continue to operate, thereby reducing the probability that the fuel cell vehicle is stranded because the stack cannot operate. When the brake air compressor fails, the control device controls a first passage to be turned on, so that the fuel cell air compressor can output air to the brake through the first passage, so that the brake continues to operate, thereby reducing the probability that the fuel cell vehicle is stranded because the brake cannot operate. Therefore, the air compression system of the embodiment of the application can reduce the probability that the fuel cell vehicle is stranded when one of the fuel cell air compressor and the brake air compressor fails and cannot operate normally.

Description

Technical Field

[0001] This application relates to, but is not limited to, the field of fuel cell vehicle technology, and particularly to an air compression system, control method, fuel cell vehicle, and storage medium. Background Technology

[0002] A fuel cell vehicle is a car powered by electricity generated by an onboard fuel cell unit. The fuel used in the onboard fuel cell unit is high-purity hydrogen or reformed hydrogen-containing fuel gas. The difference in power between a fuel cell vehicle and a conventional electric vehicle lies in the fact that the fuel cell vehicle's electricity comes from the onboard fuel cell unit, while conventional electric vehicles use batteries that are charged from the power grid.

[0003] In related technologies, fuel cell vehicles typically have two air compression systems. The first system uses a fuel cell air compressor to provide low-pressure air for the chemical reaction in the fuel cell stack. The second system uses a brake air compressor to provide high-pressure air for the vehicle's braking system. These two systems operate independently. When the fuel cell air compressor fails, the first system cannot provide low-pressure air, preventing the fuel cell stack from performing its chemical reaction. If the remaining charge in the fuel cell system is insufficient to drive the vehicle to a repair shop, it will break down. Similarly, if the brake air compressor fails, the second system relies solely on the air supply from the air reservoir for braking. If the air supply from the reservoir is insufficient to drive the vehicle to a repair shop, it will also break down.

[0004] Therefore, when either the fuel cell air compressor or the brake air compressor fails and cannot operate normally, the fuel cell vehicle is highly likely to break down and be unable to drive to a repair shop. It will need to be towed to the repair shop, resulting in higher repair costs when either the fuel cell air compressor or the brake air compressor fails. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an air compression system, a control method, a fuel cell vehicle, and a storage medium that can reduce the probability of breakdowns.

[0006] A first aspect of this application provides an air compression system, comprising:

[0007] A first air compression subsystem includes a fuel cell air compressor and a fuel cell stack. The first air compressor is connected to the fuel cell stack and is used to provide low-pressure air to the fuel cell stack.

[0008] The second air compression subsystem includes a brake air compressor and a brake, wherein the brake air compressor is connected to the brake and is used to supply high-pressure air to the brake.

[0009] The first passage has an input end connected to the fuel cell air compressor and an output end connected to the brake. The first passage is also equipped with a pressurization device for increasing the air pressure in the first passage.

[0010] The second passage has an input end connected to the brake air compressor and an output end connected to the fuel cell stack. The second passage is equipped with a pressure reducing device for reducing the air pressure in the second passage.

[0011] A control device is configured to control the first passage to be open when the fuel cell air compressor fails, so that the fuel cell air compressor outputs air to the brake through the first passage; the control device is also configured to control the second passage to be open when the brake air compressor fails, so that the brake air compressor outputs air to the fuel cell stack through the second passage.

[0012] The air compression system according to the embodiments of this application has at least the following beneficial effects: The air compression system of the embodiments of this application includes a first air compression subsystem, a second air compression subsystem, a first passage, a second passage, and a control device. The first air compression subsystem includes a fuel cell air compressor and a fuel cell stack. The first air compressor is connected to the fuel cell stack and is used to provide low-pressure air to the fuel cell stack. The second air compression subsystem includes a brake air compressor and a brake. The brake air compressor is connected to the brake and is used to provide high-pressure air to the brake. The input end of the first passage is connected to the fuel cell air compressor, and the output end of the first passage is connected to the brake. The first passage is provided with a pressurization device, which is used to increase the air pressure in the first passage. The input end of the second passage is connected to the brake air compressor, and the output end of the second passage is connected to the fuel cell stack. The second passage is provided with a pressure reduction device, which is used to reduce the air pressure in the second passage. When the fuel cell air compressor fails, the control device activates the second passage. Since the input of the second passage is connected to the brake air compressor and the output is connected to the fuel cell stack, the brake air compressor can supply air to the fuel cell stack through the second passage. Furthermore, the pressure reduction device lowers the air pressure in the second passage, allowing the fuel cell stack to continue operating, thereby reducing the probability of the fuel cell vehicle breaking down due to the stack's inoperability. When the brake air compressor fails, the control device activates the first passage. Since the input of the first passage is connected to the fuel cell air compressor and the output is connected to the brake, the fuel cell air compressor can supply air to the brake through the first passage. Furthermore, the pressure boosting device increases the air pressure in the first passage, allowing the brake to continue operating, thereby reducing the probability of the fuel cell vehicle breaking down due to the brake's inoperability. Therefore, the air compression system of this application embodiment can reduce the probability of a fuel cell vehicle breaking down when either the fuel cell air compressor or the brake air compressor fails and cannot operate normally.

[0013] According to some embodiments of this application, the first passage is further provided with a first shut-off valve, which is connected between the boosting device and the input end of the first passage; the second passage is provided with a second shut-off valve, which is connected between the pressure reducing device and the input end of the second passage.

[0014] The control device is electrically connected to the first shut-off valve and the second shut-off valve respectively. The control device is used to control the first shut-off valve to open or close the first passage, and the control device is also used to control the second shut-off valve to open or close the second passage.

[0015] According to some embodiments of this application, the second passage is further provided with a proportional valve, the pressure reducing device is connected between the second shut-off valve and the proportional valve, and the proportional valve is connected to the output end of the second passage.

[0016] According to some embodiments of this application, the second air compression subsystem further includes a dryer, an air reservoir, a distribution valve, and a brake. The dryer is connected to the brake air compressor, and the output end of the second passage is connected between the dryer and the brake air compressor. The distribution valve is connected to the dryer through the air reservoir, and the brake is connected to the distribution valve.

[0017] According to some embodiments of this application, the first air compression subsystem further includes an intercooler and a humidifier. The intercooler is connected to the fuel cell stack via the humidifier. The intercooler is also connected to the fuel cell air compressor and the output terminal of the second passage, respectively.

[0018] Secondly, embodiments of this application provide a control method for an air compression system. The air compression system includes a first air compression subsystem, a second air compression subsystem, a first passage, and a second passage. The first air compression subsystem includes a fuel cell air compressor and a fuel cell stack, with the first air compressor connected to the fuel cell stack. The second air compression subsystem includes a brake air compressor and a brake, with the brake air compressor connected to the brake. The input end of the first passage is connected to the fuel cell air compressor, and the output end of the first passage is connected to the brake. The first passage is equipped with a pressure boosting device. The input end of the second passage is connected to the brake air compressor, and the output end of the second passage is connected to the fuel cell stack. The second passage is equipped with a pressure reducing device.

[0019] The method includes:

[0020] When the brake air compressor fails, the first passage is controlled to be opened so that the fuel cell air compressor outputs air to the brake through the first passage;

[0021] When the fuel cell air compressor fails, the second passage is controlled to be turned on so that the brake air compressor outputs air to the fuel cell stack through the second passage.

[0022] According to some embodiments of this application, the first passage is provided with a first shut-off valve, which is connected between the booster device and the input end of the first passage. The second air compression subsystem further includes an air storage tank, the brake air compressor is connected to the brake through the air storage tank, and the output end of the first passage is connected between the brake air compressor and the air storage tank.

[0023] When the brake air compressor fails, controlling the first passage to be open so that the fuel cell air compressor outputs air to the brake through the first passage includes:

[0024] In the event of a malfunction in the brake air compressor, the current air pressure in the air reservoir is detected;

[0025] When the current air pressure is less than a preset air pressure threshold, the first shut-off valve is opened.

[0026] According to some embodiments of this application, the second passage is provided with a second shut-off valve and a proportional valve, the second shut-off valve being connected between the pressure reducing device and the input end of the second passage, and the proportional valve being connected between the pressure reducing device and the second passage;

[0027] When the fuel cell air compressor fails, controlling the second path to be open so that the brake air compressor outputs air to the fuel cell stack through the second path includes:

[0028] When the fuel cell air compressor fails, the status of the fuel cell stack is detected;

[0029] When the fuel cell stack is detected to be in operation, the air flow requirement of the fuel cell stack is obtained, the second shut-off valve is controlled to open, and the proportional valve is adjusted according to the control air flow requirement.

[0030] Thirdly, embodiments of this application provide a fuel cell vehicle, including an air compression system as described in any of the first aspects.

[0031] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions for causing a computer to perform a control method for an air compression system as described in any of the second aspects.

[0032] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0033] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0034] Figure 1 This is a schematic diagram of the structure of an air compression system according to some embodiments of this application;

[0035] Figure 2 This is a schematic flowchart illustrating the control method of an air compression system according to some embodiments of this application;

[0036] Figure 3 This is a schematic flowchart illustrating the control method of an air compression system according to some embodiments of this application;

[0037] Figure 4 This is a flowchart illustrating the control method of an air compression system according to some embodiments of this application.

[0038] Figure label:

[0039] Fuel cell air compressor 100; intercooler 110; humidifier 120; temperature sensor 130; pressure sensor 140; fuel cell stack 150;

[0040] Brake air compressor 200; dryer 210; drain valve 220; air tank 230; door 240; airbag 250; distribution valve 260; brake 270;

[0041] First passage 300; First shut-off valve 310; Pressure booster valve 320;

[0042] Second passage 400; Second shut-off valve 410; Pressure reducing valve 420; Proportional valve 430;

[0043] Control device 500. Detailed Implementation

[0044] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0045] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0047] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0048] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] In related technologies, fuel cell vehicles typically have two air compression systems. The first system uses a fuel cell air compressor to provide low-pressure air for the chemical reaction in the fuel cell stack. The second system uses a brake air compressor to provide high-pressure air for the vehicle's braking system. These two systems operate independently. When the fuel cell air compressor fails, the first system cannot provide low-pressure air, preventing the fuel cell stack from performing its chemical reaction and thus preventing the fuel cell from generating electricity. The vehicle then relies solely on its battery for power, but the battery's charge is usually low. If the remaining charge is insufficient to reach a repair shop, the vehicle will break down. Similarly, when the brake air compressor fails, it cannot supply air to the brakes. The second system then relies on the air from the storage tank for braking. If the storage tank's air supply is insufficient to reach a repair shop, the vehicle will also break down.

[0050] Therefore, when the fuel cell air compressor or brake air compressor malfunctions and cannot operate normally, the fuel cell vehicle is likely to break down and be unable to drive to a repair shop. It will need to be towed to the repair shop by a tow truck service, which results in higher repair costs when either the fuel cell air compressor or the brake air compressor fails.

[0051] Based on this, embodiments of this application provide an air compression system, a control method, a fuel cell vehicle, and a storage medium, which can reduce the probability of a fuel cell vehicle breaking down when the fuel cell air compressor or brake air compressor fails and cannot operate normally.

[0052] Reference Figure 1 , Figure 1This is a schematic diagram of the structure of an air compression system according to an embodiment of this application. The air compression system of this embodiment includes a first air compression subsystem, a second air compression subsystem, a first passage 300, a second passage 400, and a control device 500. The first air compression subsystem includes a fuel cell air compressor 100 and a fuel cell stack 150. The first air compressor is connected to the fuel cell stack 150, and the fuel cell air compressor 100 is used to provide low-pressure air to the fuel cell stack 150. The second air compression subsystem includes a brake air compressor 200 and a brake 270. The brake air compressor 200 and the brake 270 are connected to each other. The brake air compressor 200 is connected to the brake 270. The input end of the first passage 300 is connected to the fuel cell air compressor 100, and the output end of the first passage 300 is connected to the brake 270. The first passage 300 is equipped with a pressurizing device to increase the air pressure in the first passage 300. The input end of the second passage 400 is connected to the brake air compressor 200, and the output end of the second passage 400 is connected to the fuel cell stack 150. The second passage 400 is equipped with a pressure reducing device to reduce the air pressure in the second passage 400. When the fuel cell air compressor 100 fails, the control device 500 activates the second passage 400. Since the input of the second passage 400 is connected to the brake air compressor 200 and the output of the second passage 400 is connected to the fuel cell stack 150, the brake air compressor 200 can output air to the fuel cell stack 150 through the second passage 400. Furthermore, the pressure of the air in the second passage 400 can be reduced by the pressure reducing device, so that the fuel cell stack 150 can continue to operate, thereby reducing the probability of the fuel cell vehicle breaking down due to the fuel cell stack 150 failing to operate. When the brake air compressor 200 malfunctions, the control device 500 activates the first passage 300. Since the input of the first passage 300 is connected to the fuel cell air compressor 100 and the output of the first passage 300 is connected to the brake 270, the fuel cell air compressor 100 can output air to the brake 270 through the first passage 300. Furthermore, the pressurization device increases the air pressure in the first passage 300, allowing the brake 270 to continue operating, thereby reducing the probability of the fuel cell vehicle breaking down due to the brake 270's inability to operate. Therefore, the air compression system of this embodiment can reduce the probability of a fuel cell vehicle breaking down when either the fuel cell air compressor 100 or the brake air compressor 200 malfunctions and cannot operate normally, thereby reducing maintenance costs.

[0053] It should be noted that when both the brake air compressor 200 and the fuel cell air compressor 100 are operating normally, the control device 500 cuts off the first passage 300; the control device 500 also cuts off the second passage 400.

[0054] It should be noted that the air compression system of this application embodiment can be applied to fuel cell vehicles.

[0055] Understandably, referring to Figure 1 The first passage 300 is also provided with a first shut-off valve 310, which is connected between the booster device and the input end of the first passage 300. The second passage 400 is provided with a second shut-off valve 410, which is connected between the pressure reducing device and the input end of the second passage 400. The control device 500 is electrically connected to the first shut-off valve 310 and the second shut-off valve 410 respectively. The control device 500 is used to control the first shut-off valve 310 to open or close the first passage 300. The control device 500 is also used to control the second shut-off valve 410 to open or close the second passage 400.

[0056] Understandably, the second passage 400 is also equipped with a proportional valve 430. The pressure reducing device is connected between the second shut-off valve 410 and the proportional valve 430. The proportional valve 430 is connected to the output end of the second passage 400 and is electrically connected to the control device 500. The control device 500 can adjust the air flow rate of the second passage 400 through the proportional valve 430.

[0057] For example, refer to Figure 1 The pressurization device is a pressurization valve 320, which is connected between the first shut-off valve 310 and the output end of the first passage 300. Low-pressure air output from the fuel cell air compressor 100 enters the first passage 300 through its input end, flows sequentially through the first shut-off valve 310 and the pressurization valve 320, and the pressurized air flows into the brake 270 through the output end of the first passage 300 after the pressurization valve 320 increases its pressure. It should be noted that in some embodiments, the input end of the first shut-off valve 310 is the same as the input end of the first passage 300, and the output end of the pressurization valve 320 is the same as the output end of the first passage 300.

[0058] For example, refer to Figure 1 The pressure reducing valve 420 is connected between the second shut-off valve 410 and the proportional valve 430. When the fuel cell air compressor 100 fails, the control device 500 controls the second shut-off valve 410 to open the second passage 400. The air output from the brake air compressor 200 flows into the second circuit through the input terminal of the second circuit, and then flows sequentially through the second shut-off valve 410, the pressure reducing valve 420, and the proportional valve 430, before flowing into the fuel cell stack 150 through the output terminal of the second passage 400. The proportional valve 430 is used to regulate the air flow rate out of the output terminal of the second passage 400. It should be noted that in some embodiments, the input terminal of the second shut-off valve 410 is the input terminal of the second passage 400, and the output terminal of the proportional valve 430 is the output terminal of the second passage 400.

[0059] Understandably, the second air compression subsystem also includes a dryer 210, an air reservoir 230, a distribution valve 260, and a brake 270. The dryer 210 is connected to the brake air compressor 200, and the output end of the second passage 400 is connected between the dryer 210 and the brake air compressor 200. The distribution valve 260 is connected to the dryer 210 through the air reservoir 230, and the brake 270 is connected to the distribution valve 260. (Refer to...) Figure 1 Whether the air is output from the brake air compressor 200 or from the output of the second passage 400, it needs to be fed into the dryer 210 and then stored in the air reservoir 230. The dryer 210 dries the air, and the dried air is stored in the air reservoir 230. The distribution valve 260 and the brake 270 are used to operate according to the air in the air reservoir 230.

[0060] It is worth noting that in some embodiments, when the brake air compressor 200 fails, the air pressure in the air reservoir 230 is detected. When the air pressure in the air reservoir 230 is less than a preset threshold, the control device 500 controls the second passage 400 to be turned on so that the air output by the second passage 400 is stored in the air reservoir 230. When the air pressure in the air reservoir 230 is greater than or equal to the preset threshold, the second passage 400 is turned off.

[0061] It is worth noting that the second air compression subsystem also includes a drain valve 220, a door 240, and an airbag 250. The drain valve 220 is connected to the air reservoir 230, and the door 240 and the airbag 250 are both connected to the distribution valve 260. The air is dehumidified, dried, and filtered through the dryer 210 and the drain valve 220, and then stored in the air reservoir 230. The distribution valve 260 can distribute the air in the air reservoir 230 to the airbag 250 and the door 240.

[0062] Understandably, the first air compression subsystem also includes an intercooler 110 and a humidifier 120. The intercooler 110 is connected to the fuel cell stack 150 via the humidifier 120. The intercooler 110 is also connected to the output terminals of the fuel cell air compressor 100 and the second passage 400. (Refer to...) Figure 1 The air output from the fuel cell air compressor 100 and the air output from the first passage 300 flow sequentially into the intercooler 110 and the humidifier 120. The intercooler 110 and the humidifier 120 cool the air and increase the humidity, respectively, to ensure the normal and sufficient chemical reaction of the fuel cell stack 150.

[0063] It is worth noting that in some embodiments, a temperature sensor 130 and a pressure sensor 140 are also provided between the humidifier 120 and the fuel cell stack 150. The temperature sensor 130 is used to detect the temperature of the air flowing into the fuel cell stack 150, and the pressure sensor 140 is used to detect the pressure of the air flowing into the fuel cell stack 150.

[0064] Secondly, embodiments of this application provide a control method for an air compression system. The air compression system includes a first air compression subsystem, a second air compression subsystem, a first passage 300, and a second passage 400. The first air compression subsystem includes a fuel cell air compressor 100 and a fuel cell stack 150, with the first air compressor connected to the fuel cell stack 150. The second air compression subsystem includes a brake air compressor 200 and a brake 270, with the brake air compressor 200 connected to the brake 270. The input end of the first passage 300 is connected to the fuel cell air compressor 100, and the output end of the first passage 300 is connected to the brake 270. The first passage 300 is equipped with a booster device. The input end of the second passage 400 is connected to the brake air compressor 200, and the output end of the second passage 400 is connected to the fuel cell stack 150. The second passage 400 is equipped with a depressurization device.

[0065] Reference Figure 2 The method includes the following steps:

[0066] In step S210, when the brake air compressor 200 fails, the first passage 300 is controlled to be turned on so that the fuel cell air compressor 100 outputs air to the brake 270 through the first passage 300.

[0067] In step S220, when the fuel cell air compressor 100 fails, the second passage 400 is controlled to be turned on so that the brake air compressor 200 outputs air to the fuel cell stack 150 through the second passage 400.

[0068] It should be noted that the air compression system of the second aspect can be the air compression system as described in the embodiment of the first aspect. (Refer to...) Figure 1 The air compression system of this application embodiment also includes a control device 500, which is electrically connected to the first passage 300 and the second passage 400 respectively. The control method of this application embodiment can be applied to... Figure 1 The control device 500 shown.

[0069] The control method of the air compression system in this application embodiment, when the brake air compressor 200 fails, the control device 500 opens the first passage 300, allowing the fuel cell air compressor 100 to output air to the brake 270 through the first passage 300. Furthermore, the pressure of the air in the first passage 300 is increased by the booster device, allowing the brake 270 to continue operating, thereby reducing the probability of the fuel cell vehicle breaking down due to the brake 270's inability to operate. When it is determined that the fuel cell air compressor 100 has failed, the control device 500 opens the first passage 300, allowing the brake air compressor 200 to output air to the fuel cell stack 150 through the second passage 400. Furthermore, the pressure of the air in the second passage 400 is reduced by the pressure reducer, allowing the fuel cell stack 150 to continue operating, thereby reducing the probability of the fuel cell vehicle breaking down due to the fuel cell stack 150's inability to operate. Therefore, the air compression system of this application embodiment can reduce the probability of a fuel cell vehicle breaking down when either the fuel cell air compressor 100 or the brake air compressor 200 fails and cannot operate normally, thereby reducing maintenance costs.

[0070] It should be noted that when both the brake air compressor 200 and the fuel cell air compressor 100 are operating normally, the control device 500 cuts off the first passage 300 and the second passage 400. When both the brake air compressor 200 and the fuel cell air compressor 100 malfunction, the control device 500 cuts off the first passage 300 and the second passage 400.

[0071] It should be noted that the control device 500 is electrically connected to both the brake air compressor 200 and the fuel cell air compressor 100. When the control device 500 receives a first fault message from the brake air compressor 200, it can determine that the brake air compressor 200 is faulty; when the control device 500 receives a second fault message from the fuel cell air compressor 100, it can determine that the fuel cell air compressor 100 is faulty. It should also be noted that both the first and second fault messages are CAN messages. When the brake air compressor 200 fails, it sends the first fault message to the control device 500; when the fuel cell air compressor 100 fails, it sends the second fault message to the control device 500.

[0072] It is understood that the first passage 300 is provided with a first shut-off valve 310, which is connected between the booster device and the input end of the first passage 300. The second air compression subsystem also includes an air storage tank 230. The brake air compressor 200 is connected to the brake 270 through the air storage tank 230. The output end of the first passage 300 is connected between the brake air compressor 200 and the air storage tank 230.

[0073] Reference Figure 3 Step S210 may include, but is not limited to, the following steps:

[0074] Step S310: When the brake air compressor 200 malfunctions, the current air pressure of the air reservoir 230 is detected;

[0075] Step S320: When the current air pressure is less than the preset air pressure threshold, the first shut-off valve 310 is opened.

[0076] In steps S310 and S320, when the brake air compressor 200 malfunctions, the current air pressure in the air reservoir 230 is detected. If the current air pressure is lower than a preset air pressure threshold, it indicates that the air in the air reservoir 230 is insufficient to support the normal operation of the brake 270. In this case, the first shut-off valve 310 is opened, opening the first passage 300. This allows the fuel cell air compressor 100 to output air to the brake 270 through the first passage 300. Furthermore, the pressure of the air in the first passage 300 is increased by the pressurization device, ensuring that the air output from the first passage 300 meets the requirements of the brake 270, allowing the brake 270 to continue operating. This reduces the probability of the fuel cell vehicle breaking down due to the brake 270's inability to operate. It should be noted that the preset air pressure threshold can be between 0.6 MPa and 0.8 MPa, for example, 0.6 MPa, 0.7 MPa, or 0.8 MPa. Those skilled in the art can set the preset air pressure value according to actual needs.

[0077] It is worth noting that in some embodiments, after opening the first shut-off valve 310 in step S320, if the current air pressure of the air reservoir 230 is detected to be greater than or equal to a preset air pressure threshold, indicating that the air in the air reservoir 230 is sufficient to support the normal operation of the brake 270, the first shut-off valve 310 is closed.

[0078] It is understood that the second passage 400 is provided with a second shut-off valve 410 and a proportional valve 430. The second shut-off valve 410 is connected between the pressure reducing device and the input end of the second passage, and the proportional valve 430 is connected between the pressure reducing device and the second passage 400.

[0079] Reference Figure 4 Step S220 may include, but is not limited to, the following steps:

[0080] Step S410: When the fuel cell air compressor 100 fails, check the status of the fuel cell stack 150;

[0081] In step S420, when it is detected that the fuel cell stack 150 is in working state, the air flow requirement of the fuel cell stack 150 is obtained, the second shut-off valve 410 is opened, and the proportional valve 430 is adjusted according to the control air flow requirement.

[0082] In steps S410 and S420, when the fuel cell air compressor 100 malfunctions, the status of the fuel cell stack 150 is detected. If the fuel cell stack 150 is detected as operating, it indicates that the fuel cell vehicle's power is insufficient and the fuel cell stack 150 needs to generate electricity. The airflow requirement of the fuel cell stack 150 is then obtained, the second shut-off valve 410 is opened, and the proportional valve 430 is controlled according to the airflow requirement. This allows the brake air compressor 200 to output air to the fuel cell stack 150 through the second passage 400. Furthermore, the pressure reduction device lowers the air pressure in the second passage 400 to ensure that the air output from the second passage 400 meets the requirements of the fuel cell stack 150, allowing it to continue operating and reducing the probability of the fuel cell vehicle breaking down due to the fuel cell stack 150's inability to operate. If the fuel cell stack 150 is detected as not operating, it indicates that the fuel cell stack 150 does not need to generate electricity, and therefore, it is not necessary to control the opening of the second shut-off valve 410.

[0083] Thirdly, embodiments of this application provide a fuel cell vehicle, including an air compression system as described in any of the first aspects.

[0084] It should be noted that since the fuel cell vehicle includes the air compression system of any of the first aspects, the corresponding content of the air compression system in the embodiments mentioned in the first aspect is also applicable to the fuel cell vehicle in the embodiments mentioned in the third aspect, and has the same implementation principle and technical effect. To avoid redundancy, it will not be described in detail here.

[0085] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions for causing a computer to perform a control method for an air compression system as described in any of the second aspects.

[0086] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0087] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. An air compression system, characterized by, The air compression system comprises a first air compression subsystem, a second air compression subsystem, a first passage and a second passage, the first air compression subsystem comprises a fuel cell air compressor and a stack, the fuel cell air compressor is connected with the stack, and the fuel cell air compressor is used for providing low-pressure air to the stack; The second air compression subsystem comprises a brake air compressor and a brake, the brake air compressor is connected with the brake, and the brake air compressor is used for providing high-pressure air to the brake; The first passage is connected with the fuel cell air compressor at an input end, and is connected with the brake at an output end; the first passage is further provided with a pressure increasing device, and the pressure increasing device is used for increasing the pressure of air in the first passage; The second passage is connected with the brake air compressor at an input end, and is connected with the stack at an output end; the second passage is provided with a pressure reducing device, and the pressure reducing device is used for reducing the pressure of air in the second passage; The control device is used for controlling the first passage to be conducted when the fuel cell air compressor fails, so that the fuel cell air compressor outputs air to the brake through the first passage; and the control device is used for controlling the second passage to be conducted when the brake air compressor fails, so that the brake air compressor outputs air to the stack through the second passage. The first passage is further provided with a first shutoff valve connected between the pressure increasing device and the input end of the first passage; and the second passage is provided with a second shutoff valve connected between the pressure reducing device and the input end of the second passage; 2. The air compression system of claim 1, wherein, The control device is electrically connected with the first shutoff valve and the second shutoff valve respectively, and is used for controlling the first shutoff valve to conduct or cut off the first passage, and is used for controlling the second shutoff valve to conduct or cut off the second passage. The second passage is further provided with a proportional valve, the pressure reducing device is connected between the second shutoff valve and the proportional valve, and the proportional valve is connected with the output end of the second passage.

3. The air compression system of claim 2, wherein, The second air compression subsystem further comprises a dryer, an air cylinder, a distribution valve and a brake, the dryer is connected with the brake air compressor, the output end of the second passage is connected between the dryer and the brake air compressor, the distribution valve is connected with the dryer through the air cylinder, and the brake is connected with the distribution valve.

4. The air compression system of claim 1, wherein, The first air compression subsystem further comprises an intercooler and a humidifier, the intercooler is connected with the stack through the humidifier, and the intercooler is connected with the fuel cell air compressor and the output end of the second passage respectively.

5. The air compression system of claim 1, wherein, The air compression system comprises a first air compression subsystem, a second air compression subsystem, a first passage and a second passage, the first air compression subsystem comprises a fuel cell air compressor and a stack, the fuel cell air compressor is connected with the stack, and the fuel cell air compressor is used for providing low-pressure air to the stack; 6. A control method of an air compression system, characterized by, ​ The second air compression subsystem comprises a brake air compressor and a brake, the brake air compressor being connected with the brake; an input end of the first passage is connected with the fuel cell air compressor, an output end of the first passage is connected with the brake, and the first passage is provided with a pressure increasing device; an input end of the second passage is connected with the brake air compressor, and an output end of the second passage is connected with the stack, and the second passage is provided with a pressure reducing device; The method comprises: When the brake air compressor fails, the first passage is controlled to be conducted, so that the fuel cell air compressor outputs air to the brake through the first passage; When the fuel cell air compressor fails, the second passage is controlled to be conducted, so that the brake air compressor outputs air to the stack through the second passage.

7. The control method of an air compression system according to claim 6, wherein, The first passage is provided with a first shutoff valve, the first shutoff valve being connected between the pressure increasing device and the input end of the first passage, the second air compression subsystem further comprises an air cylinder, the brake air compressor being connected with the brake through the air cylinder, and the output end of the first passage being connected between the brake air compressor and the air cylinder; The control of the first passage to be conducted when the brake air compressor fails, so that the fuel cell air compressor outputs air to the brake through the first passage, comprises: When the brake air compressor fails, the current air pressure of the air cylinder is detected; When the current air pressure is less than a preset air pressure threshold, the first shutoff valve is opened.

8. The control method of an air compression system according to claim 6, wherein, The second passage is provided with a second shutoff valve and a proportional valve, the second shutoff valve being connected between the pressure reducing device and the input end of the second passage, and the proportional valve being connected between the pressure reducing device and the second passage; The control of the second passage to be conducted when the fuel cell air compressor fails, so that the brake air compressor outputs air to the stack through the second passage, comprises: When the fuel cell air compressor fails, the state of the stack is detected; When it is detected that the stack is in a working state, the air flow demand of the stack is acquired, the second shutoff valve is controlled to be opened, and the proportional valve is adjusted according to the air flow demand.

9. A fuel cell vehicle characterized by comprising: The air compression system comprises the air compression system according to any one of claims 1 to 5.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer executable instructions for causing a computer to execute the control method of the air compression system according to any one of claims 6 to 8.

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