Fuel cell cathode gas supply system and leak detection method, electronic device

Abstract

The application discloses a fuel cell cathode gas supply system and a leakage detection method and an electronic device. The fuel cell cathode gas supply system comprises an air filter, a flow meter, an air compressor, an intercooler, a stack, a U-shaped communicating vessel, a cooling liquid injection valve, a liquid level sensor and a back pressure valve. The air filter, the flow meter, the air compressor and the intercooler are sequentially connected to the cathode inlet of the stack. The cathode outlet of the stack is sequentially connected to the U-shaped communicating vessel and the back pressure valve, and the U-shaped communicating vessel is used for leakage detection of the fuel cell cathode gas supply system. The U-shaped communicating vessel is connected to the liquid level sensor, and the liquid level sensor is used for continuously collecting a plurality of real-time liquid level values in the U-shaped communicating vessel. One end of the cooling liquid injection valve is connected to the U-shaped communicating vessel, and the other end of the cooling liquid injection valve is connected to a cooling liquid circuit of the fuel cell or a water kettle. The cooling liquid injection valve is used for controlling the injection of cooling liquid into the U-shaped communicating vessel. The application is simple in detection operation and can detect the leakage of the fuel cell cathode gas supply system.

Description

Technical Field

[0001] This invention relates to the field of fuel cell testing technology, and in particular to a fuel cell cathode gas supply system and a leakage detection method and electronic equipment. Background Technology

[0002] For fuel cell systems, whether it is due to loosening of pipe joints caused by vibration or poor sealing of valve bodies due to long-term wear, leakage problems in the cathode gas supply system can occur. This may lead to loss of control over cathode gas supply pressure and flow during system operation, or air infiltration after system shutdown, forming a hydrogen-air interface that corrodes the stack. Both of these can cause a decline in fuel cell performance or even serious failures, affecting the use of the entire system. Therefore, ensuring that the fuel cell cathode does not leak is particularly important for ensuring the safety and efficiency of the fuel cell system.

[0003] For fuel cell systems with only one back pressure valve at the cathode tailpipe, the back pressure valve needs to constantly change its opening to regulate air pressure and flow, and also needs to shut off after shutdown. If the sealing performance deteriorates due to long-term wear, it will lead to cathode air leakage.

[0004] Existing gas leak detection methods mostly focus on hydrogen leak detection on the anode side, with less emphasis on air leak detection on the cathode side. Furthermore, most leak detection methods require shutdown and the use of specialized equipment for airtightness testing, or complex control of system components after shutdown, to identify cathode leaks. It is impossible to detect leaks while the system is running and starting up. Summary of the Invention

[0005] This invention provides a fuel cell cathode gas supply system and a leak detection method and electronic device. It does not require special shutdown for complex component control, the detection operation is simple, and it can realize cathode leak detection without complex calculations, resulting in low fault diagnosis complexity.

[0006] According to one aspect of the present invention, a fuel cell cathode gas supply system is provided, comprising: an air filter, a flow meter, an air compressor, an intercooler, a fuel cell stack, a U-shaped connector, a coolant injection valve, a liquid level sensor, and a back pressure valve;

[0007] The air filter, the flow meter, the air compressor, and the intercooler are connected in sequence and then connected to the cathode inlet of the fuel cell stack.

[0008] The cathode outlet of the fuel cell stack is sequentially connected to the U-shaped connector and the back pressure valve. The U-shaped connector is used for leak detection of the fuel cell cathode gas supply system.

[0009] The U-shaped communicating vessel is connected to the liquid level sensor, which is used to continuously collect multiple real-time liquid level values ​​within the U-shaped communicating vessel.

[0010] One end of the coolant injection valve is connected to the U-shaped connector, and the other end of the coolant injection valve is connected to the coolant circuit of the fuel cell or a water tank. The coolant injection valve is used to control the injection of coolant into the U-shaped connector.

[0011] Optionally, the fuel cell cathode gas supply system also includes a temperature sensor connected between the intercooler and the cathode inlet of the fuel cell stack.

[0012] Optionally, the fuel cell cathode gas supply system further includes an air inlet pressure sensor and an air outlet pressure sensor, wherein the air inlet pressure sensor is connected between the intercooler and the temperature sensor, and the air outlet pressure sensor is connected to the back pressure valve.

[0013] According to another aspect of the present invention, a method for detecting leakage in a fuel cell cathode gas supply system is provided. The fuel cell cathode gas supply system includes: an air filter, a flow meter, an air compressor, and an intercooler connected in sequence to the cathode inlet of the fuel cell stack; a U-shaped connector and a back pressure valve connected in sequence to the cathode outlet of the fuel cell stack; and a coolant injection valve and a liquid level sensor connected to the U-shaped connector.

[0014] The method for detecting leakage in the fuel cell cathode gas supply system includes:

[0015] The liquid level sensor continuously collects multiple real-time liquid level values ​​within the U-shaped communicating vessel.

[0016] The system detects whether there is a leak in the fuel cell cathode gas supply system based on the multiple real-time liquid level values ​​and the preset target value, and determines the location of the leak point. The location of the leak point includes: both sides of the U-shaped connector, between the U-shaped connector and the back pressure valve, and between the U-shaped connector and the cathode outlet of the fuel cell stack.

[0017] Optionally, the step of detecting whether there is a leak in the fuel cell cathode gas supply system and determining the location of the leak point based on the plurality of real-time liquid level values ​​and preset target values ​​includes:

[0018] When the real-time liquid level value is always equal to the preset target value, it is determined that there is currently no leakage in the fuel cell cathode gas supply system.

[0019] Optionally, the step of detecting whether there is a leak in the fuel cell cathode gas supply system and determining the location of the leak point based on the plurality of real-time liquid level values ​​and preset target values ​​includes:

[0020] When the multiple real-time liquid level values ​​are not always equal to the preset target value, and the final real-time liquid level value is equal to the preset target value, it is determined that there are leakage points on both sides of the current U-shaped connector.

[0021] Optionally, the step of detecting whether there is a leak in the fuel cell cathode gas supply system and determining the location of the leak point based on the plurality of real-time liquid level values ​​and preset target values ​​includes:

[0022] When the multiple real-time liquid level values ​​are not always equal to the preset target value, and the final real-time liquid level value is less than the preset target value, it is determined that there is a leakage point between the current U-shaped connector and the back pressure valve.

[0023] Optionally, the step of detecting whether there is a leak in the fuel cell cathode gas supply system and determining the location of the leak point based on the plurality of real-time liquid level values ​​and preset target values ​​includes:

[0024] When the multiple real-time liquid level values ​​are not always equal to the preset target value, and the final real-time liquid level value is greater than the preset target value, it is determined that there is a leakage point between the current U-shaped connector and the cathode outlet of the fuel cell stack.

[0025] According to another aspect of the present invention, an electronic device is also provided, the electronic device comprising:

[0026] One or more processors;

[0027] Memory, used to store one or more programs;

[0028] When the one or more programs are executed by the one or more processors, the one or more processors implement the method for detecting leakage in the fuel cell cathode gas supply system as described in the embodiments of the present invention.

[0029] According to another aspect of the present invention, a computer-readable storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements the method for detecting leakage in a fuel cell cathode gas supply system as described in the embodiments of the present invention.

[0030] The technical solution of this invention introduces a U-shaped connector structure into the fuel cell cathode gas supply system. After the fuel cell system is shut down, a coolant injection valve controls the injection of coolant into the U-shaped connector, achieving a sealing effect on the cathode pipeline and effectively preventing leakage caused by poor sealing of the back pressure valve. Simultaneously, a liquid level sensor monitors the liquid level changes within the U-shaped connector in real time, allowing for the detection of cathode leaks and preliminary identification of the leak range. The control operation is simple, requiring no dedicated shutdown for complex component control. The detection method is simple, requiring no complex calculations to detect cathode leaks, resulting in low fault diagnosis complexity. This solves the problem that existing detection systems require shutdown and the use of specialized equipment for airtightness testing, or complex control of system components after shutdown, to identify cathode leaks, making it impossible to detect leaks simultaneously with system startup.

[0031] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of a fuel cell cathode gas supply system according to an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the structure of another fuel cell cathode gas supply system provided according to an embodiment of the present invention;

[0035] Figure 3 This is a flowchart of a leak detection method for a fuel cell cathode gas supply system according to an embodiment of the present invention;

[0036] Figure 4 This is a flowchart of a leak detection process for a fuel cell cathode gas supply system according to an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of an electronic device provided according to an embodiment of the present invention. Detailed Implementation

[0038] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0039] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0040] Figure 1 This is a schematic diagram of a fuel cell cathode gas supply system according to an embodiment of the present invention. (Refer to...) Figure 1 This invention provides a fuel cell cathode gas supply system, which includes: an air filter 1, a flow meter 2, an air compressor 3, an intercooler 4, a fuel cell stack 5, a U-shaped connector 6, a coolant injection valve 7, a liquid level sensor 8, and a back pressure valve 9. The air filter 1, flow meter 2, air compressor 3, and intercooler 4 are connected in sequence and then connected to the cathode inlet of the fuel cell stack 5. The cathode outlet of the fuel cell stack 5 is connected in sequence to the U-shaped connector 6 and the back pressure valve 9. The U-shaped connector 6 is used for leak detection of the fuel cell cathode gas supply system. The U-shaped connector 6 is connected to the liquid level sensor 8, which is used to continuously collect multiple real-time liquid level values ​​within the U-shaped connector 6. One end of the coolant injection valve 7 is connected to the U-shaped connector 6, and the other end of the coolant injection valve 7 is connected to the coolant circuit of the fuel cell or a water tank. The coolant injection valve 7 is used to control the injection of coolant into the U-shaped connector 6.

[0041] Specifically, after the fuel cell cathode gas supply system completes normal operation and the cathode and anode purging processes, the coolant injection valve 7 is opened, allowing coolant to flow into the U-shaped connector 6. The level sensor 8 continuously monitors the level of the U-shaped connector 6 and controls the coolant injection rate until the level l reaches the preset target value l0. At this point, the coolant injection valve 7 is closed, and the level l = l0. The U-shaped connector 6, now filled with coolant, acts as a liquid seal at the tail end of the cathode gas supply system, preventing air infiltration into the cathode due to sealing issues with the back pressure valve 9, which could affect the performance and durability of the fuel cell stack 5.

[0042] Within a set time period, the changes in multiple real-time liquid level values ​​collected by the liquid level sensor 8 are continuously monitored to further detect whether there is a leak in the fuel cell cathode gas supply system and to preliminarily determine the location of the leak point.

[0043] When the liquid level always satisfies l = l0, it is determined that there is no leakage in the current fuel cell cathode gas supply system;

[0044] When the liquid level changes and does not always satisfy l=l0, and the final liquid level l=l0, it is determined that there are leakage points on both sides of the U-shaped connector 6 in the current fuel cell cathode gas supply system.

[0045] When the liquid level changes and does not always satisfy l = l0, and the final liquid level l < l0, it is determined that there is a leak point on the side of the U-shaped connector 6 to the back pressure valve 9 of the current fuel cell cathode gas supply system.

[0046] When the liquid level changes and does not always satisfy l = l0, and the final liquid level l > l0, it is determined that there is a leak point on the U-shaped connector 6 to the stack 5 side of the current fuel cell cathode gas supply system.

[0047] The technical solution of this invention introduces a U-shaped connector structure into the fuel cell cathode gas supply system. After the fuel cell system is shut down, a coolant injection valve controls the injection of coolant into the U-shaped connector, achieving a sealing effect on the cathode pipeline and effectively preventing leakage caused by poor sealing of the back pressure valve. Simultaneously, a liquid level sensor monitors the liquid level changes within the U-shaped connector in real time, allowing for the detection of cathode leaks and preliminary identification of the leak range. The control operation is simple, requiring no dedicated shutdown for complex component control. The detection method is simple, requiring no complex calculations to detect cathode leaks, resulting in low fault diagnosis complexity. This solves the problem that existing detection systems require shutdown and the use of specialized equipment for airtightness testing, or complex control of system components after shutdown, to identify cathode leaks, making it impossible to detect leaks simultaneously with system startup.

[0048] Figure 2This is a schematic diagram of another fuel cell cathode gas supply system provided according to an embodiment of the present invention, with reference to... Figure 2 Optionally, the fuel cell cathode gas supply system also includes a temperature sensor 20, which is connected between the intercooler 4 and the cathode inlet of the stack 5.

[0049] Continue to refer to Figure 2 Optionally, the fuel cell cathode gas supply system also includes an air inlet pressure sensor 21 and an air outlet pressure sensor 22. The air inlet pressure sensor 21 is connected between the intercooler 4 and the temperature sensor 20, and the air outlet pressure sensor 22 is connected to the back pressure valve 9.

[0050] This invention also provides a method for detecting leaks in a fuel cell cathode gas supply system. The fuel cell cathode gas supply system includes: an air filter, a flow meter, an air compressor, and an intercooler connected in sequence to the cathode inlet of the fuel cell stack; a U-shaped connector and a back pressure valve connected in sequence to the cathode outlet of the fuel cell stack; and a coolant injection valve and a liquid level sensor connected to the U-shaped connector.

[0051] Figure 3 This is a flowchart of a leak detection method for a fuel cell cathode gas supply system according to an embodiment of the present invention, with reference to... Figure 3 Methods for detecting leaks in the cathode gas supply system of a fuel cell include:

[0052] S110: Continuously collect multiple real-time liquid level values ​​within the U-shaped communicating vessel using a liquid level sensor.

[0053] S120. Detect whether there is a leak in the fuel cell cathode gas supply system based on multiple real-time liquid level values ​​and preset target values, and determine the location of the leak point. The location of the leak point includes: both sides of the U-shaped connector, between the U-shaped connector and the back pressure valve, and between the U-shaped connector and the cathode outlet of the fuel cell stack.

[0054] Optionally, detecting whether there is a leak in the fuel cell cathode gas supply system and determining the location of the leak point based on multiple real-time liquid level values ​​and preset target values ​​includes:

[0055] When the real-time liquid level value is always equal to the preset target value, it is determined that there is currently no leakage in the fuel cell cathode gas supply system.

[0056] Optionally, detecting whether there is a leak in the fuel cell cathode gas supply system and determining the location of the leak point based on multiple real-time liquid level values ​​and preset target values ​​includes:

[0057] When multiple real-time liquid level values ​​are not always equal to the preset target value, and the final real-time liquid level value is equal to the preset target value, it is determined that there are leakage points on both sides of the current U-shaped connector.

[0058] Optionally, detecting whether there is a leak in the fuel cell cathode gas supply system and determining the location of the leak point based on multiple real-time liquid level values ​​and preset target values ​​includes:

[0059] When multiple real-time liquid level values ​​are not always equal to the preset target value, and the final real-time liquid level value is less than the preset target value, it is determined that there is a leakage point between the current U-shaped connector and the back pressure valve.

[0060] Optionally, detecting whether there is a leak in the fuel cell cathode gas supply system and determining the location of the leak point based on multiple real-time liquid level values ​​and preset target values ​​includes:

[0061] When multiple real-time liquid level values ​​are not always equal to the preset target value, and the final real-time liquid level value is greater than the preset target value, it is determined that there is a leakage point between the current U-shaped connector and the cathode outlet of the fuel cell stack.

[0062] Figure 4 This is a flowchart of a leak detection process for a fuel cell cathode gas supply system according to an embodiment of the present invention, for reference. Figure 4 Specifically, in combination Figure 2 After the fuel cell cathode gas supply system completes normal operation and the cathode and anode purging processes, the coolant injection valve 7 is opened, allowing coolant to flow into the U-shaped connector 6. The level sensor 8 continuously monitors the level in the U-shaped connector 6 and controls the coolant injection rate until the level l reaches the preset target value l0. At this point, the coolant injection valve 7 is closed, and the level l = l0. The U-shaped connector 6, now filled with coolant, acts as a liquid seal at the tail end of the cathode gas supply system, preventing air infiltration into the cathode due to back pressure valve 9 sealing issues, which could affect the performance and durability of the fuel cell stack 5.

[0063] Within a set time period, the changes in multiple real-time liquid level values ​​collected by the liquid level sensor 8 are continuously monitored to further detect whether there is a leak in the fuel cell cathode gas supply system and to preliminarily determine the location of the leak point.

[0064] When the liquid level always satisfies l = l0, it is determined that there is no leakage in the current fuel cell cathode gas supply system;

[0065] When the liquid level changes and does not always satisfy l=l0, and the final liquid level l=l0, it is determined that there are leakage points on both sides of the U-shaped connector 6 in the current fuel cell cathode gas supply system.

[0066] When the liquid level changes and does not always satisfy l = l0, and the final liquid level l < l0, it is determined that there is a leak point on the side of the U-shaped connector 6 to the back pressure valve 9 of the current fuel cell cathode gas supply system.

[0067] When the liquid level changes and does not always satisfy l = l0, and the final liquid level l > l0, it is determined that there is a leak point on the U-shaped connector 6 to the stack 5 side of the current fuel cell cathode gas supply system.

[0068] Since the fuel cell cathode gas supply system is used to perform the leakage detection method of the fuel cell cathode gas supply system provided in any embodiment of the present invention, the leakage detection method of the fuel cell cathode gas supply system has the same beneficial effects as the fuel cell cathode gas supply system, and will not be described again here.

[0069] Figure 5 A schematic diagram of an electronic device 10 that can be used to implement embodiments of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0070] like Figure 5 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0071] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0072] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as a leak detection method for a fuel cell cathode gas supply system.

[0073] In some embodiments, the leak detection method for the fuel cell cathode gas supply system can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the leak detection method for the fuel cell cathode gas supply system described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform the leak detection method for the fuel cell cathode gas supply system by any other suitable means (e.g., by means of firmware).

[0074] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0075] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0076] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0077] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0078] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0079] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0080] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0081] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A fuel cell cathode gas supply system, characterized in that, include: Air filters, flow meters, air compressors, intercoolers, fuel cells, U-shaped connectors, coolant injection valves, level sensors, and back pressure valves; The air filter, the flow meter, the air compressor, and the intercooler are connected in sequence and then connected to the cathode inlet of the fuel cell stack. The cathode outlet of the fuel cell stack is sequentially connected to the U-shaped connector and the back pressure valve. The U-shaped connector is used for leak detection of the fuel cell cathode gas supply system. The U-shaped communicating vessel is connected to the liquid level sensor, which is used to continuously collect multiple real-time liquid level values ​​within the U-shaped communicating vessel. One end of the coolant injection valve is connected to the U-shaped connector, and the other end of the coolant injection valve is connected to the coolant circuit of the fuel cell or a water tank. The coolant injection valve is used to control the injection of coolant into the U-shaped connector.

2. The fuel cell cathode gas supply system according to claim 1, characterized in that, It also includes a temperature sensor connected between the intercooler and the cathode inlet of the fuel cell stack.

3. The system according to claim 2, characterized in that, It also includes an air inlet pressure sensor and an air outlet pressure sensor, wherein the air inlet pressure sensor is connected between the intercooler and the temperature sensor, and the air outlet pressure sensor is connected to the back pressure valve.

4. A method for detecting leaks in a fuel cell cathode gas supply system, characterized in that, The fuel cell cathode gas supply system includes: an air filter, a flow meter, an air compressor, and an intercooler connected in sequence to the cathode inlet of the fuel cell stack; a U-shaped connector and a back pressure valve connected in sequence to the cathode outlet of the fuel cell stack; and a coolant injection valve and a liquid level sensor connected to the U-shaped connector. The method for detecting leakage in the fuel cell cathode gas supply system includes: The liquid level sensor continuously collects multiple real-time liquid level values ​​within the U-shaped communicating vessel. The system detects whether there is a leak in the fuel cell cathode gas supply system based on the multiple real-time liquid level values ​​and the preset target value, and determines the location of the leak point. The location of the leak point includes: both sides of the U-shaped connector, between the U-shaped connector and the back pressure valve, and between the U-shaped connector and the cathode outlet of the fuel cell stack.

5. The leakage detection method according to claim 4, characterized in that, The step of detecting whether there is a leak in the fuel cell cathode gas supply system and determining the location of the leak point based on the multiple real-time liquid level values ​​and preset target values ​​includes: When the real-time liquid level value is always equal to the preset target value, it is determined that there is currently no leakage in the fuel cell cathode gas supply system.

6. The leakage detection method according to claim 4, characterized in that, The step of detecting whether there is a leak in the fuel cell cathode gas supply system and determining the location of the leak point based on the multiple real-time liquid level values ​​and preset target values ​​includes: When the multiple real-time liquid level values ​​are not always equal to the preset target value, and the final real-time liquid level value is equal to the preset target value, it is determined that there are leakage points on both sides of the current U-shaped connector.

7. The leakage detection method according to claim 4, characterized in that, The step of detecting whether there is a leak in the fuel cell cathode gas supply system and determining the location of the leak point based on the multiple real-time liquid level values ​​and preset target values ​​includes: When the multiple real-time liquid level values ​​are not always equal to the preset target value, and the final real-time liquid level value is less than the preset target value, it is determined that there is a leakage point between the current U-shaped connector and the back pressure valve.

8. The leakage detection method according to claim 4, characterized in that, The step of detecting whether there is a leak in the fuel cell cathode gas supply system and determining the location of the leak point based on the multiple real-time liquid level values ​​and preset target values ​​includes: When the multiple real-time liquid level values ​​are not always equal to the preset target value, and the final real-time liquid level value is greater than the preset target value, it is determined that there is a leakage point between the current U-shaped connector and the cathode outlet of the fuel cell stack.

9. An electronic device, characterized in that, include: One or more processors; Memory, used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method for detecting leakage in the fuel cell cathode gas supply system as described in any one of claims 4-8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the method for detecting leakage in the fuel cell cathode gas supply system as described in any one of claims 4-8.

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