Diagnostic method and device for vehicle fuel cell, automobile and storage medium

Abstract

The present application relates to the technical field of vehicles, and discloses a diagnosis method and device for a vehicle fuel cell, an automobile and a storage medium. The method comprises the following steps: when it is detected that a starting procedure is started, air is controlled to be introduced into the cathode of a fuel cell stack, hydrogen is controlled to be introduced into the anode, and an open circuit voltage is set; if it is detected that the voltage value of a first stack cell piece meets a first preset voltage detection condition within a first preset state maintaining duration, position information is acquired, and a stack internal leakage risk prompt is generated according to the position information; a shutdown procedure is executed to control the engine to shut down, and starting is prohibited; and the stability and performance of the open circuit voltage of each cell piece are observed during the starting process, so that the diagnosis of the internal leakage fault is realized, and the engine is automatically shut down when it is determined that the internal leakage fault occurs, the determination of the stack internal leakage risk can be realized under the actual application condition of the fuel cell, the timeliness of the diagnosis of the stack internal leakage can be improved, and the timely disposal of the stack internal leakage can be realized.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more particularly to a diagnostic method, device, vehicle, and storage medium for a vehicle fuel cell. Background Technology

[0002] Fuel cell vehicles, with their advantages of fast refueling, long range, and low-temperature resistance, have become a solution to the problem of zero emissions in the future, along with pure electric vehicles, and have received widespread attention from major countries and companies in recent years.

[0003] As the core assembly of fuel cell vehicles, the fuel cell stack is the site where electrochemical reactions occur. Its working principle is as follows: Hydrogen enters the anode and reaches the surface of the anode catalyst through diffusion. Under the action of the anode catalyst, it decomposes into positively charged protons and negatively charged electrons. The protons are carried by water and pass through the proton exchange membrane to reach the cathode, while the electrons flow to the cathode through the load along the external circuit. At the same time, oxygen reaches the surface of the cathode catalyst through diffusion. Under the action of the cathode catalyst, electrons, protons and oxygen undergo an oxygen reduction reaction to generate water and energy.

[0004] At the current stage, lifespan is the main bottleneck restricting the development of the fuel cell industry. While there is considerable research on fuel cell stack performance degradation and prediction, in practical use, failures such as internal leakage sometimes occur before the performance degradation assessment is completed. When internal leakage occurs, hydrogen and oxygen gases cross-contaminate within the stack, posing safety hazards such as combustion and explosion. Therefore, to avoid these safety risks, the stack status should be assessed online, and operation should be stopped promptly upon detection of anomalies.

[0005] Current fuel cell diagnostic methods typically involve introducing inert gas into the anode of the fuel cell and maintaining pressure in a sealed environment. The rate of pressure decrease in a single chamber is then observed to determine whether internal leakage failure has occurred and its severity. However, existing technologies are only suitable for offline testing and cannot be measured in actual vehicle applications, resulting in poor timeliness of diagnosis. Summary of the Invention

[0006] This invention provides a diagnostic method, device, vehicle, and storage medium for vehicle fuel cells. It can determine the risk of internal leakage in the fuel cell stack in actual vehicle applications, improve the timeliness of internal leakage diagnosis, and enable timely handling of internal leakage.

[0007] According to one aspect of the present invention, a diagnostic method for a vehicle fuel cell is provided, comprising:

[0008] When the start-up procedure is detected to begin execution, air is introduced into the cathode of the fuel cell stack, hydrogen is introduced into the anode of the fuel cell stack, and the open-circuit voltage is set.

[0009] If the voltage value of the first battery cell meets the first preset voltage detection condition within the first preset state holding time, the position information of the first battery cell is obtained, and a battery cell internal leakage risk warning is generated based on the position information of the first battery cell.

[0010] Execute the shutdown procedure to control the engine to stop and set a no-start rule.

[0011] According to another aspect of the present invention, a diagnostic device for a vehicle fuel cell is provided, comprising:

[0012] The open-circuit voltage setting module is used to control the flow of air to the cathode of the fuel cell stack and hydrogen to the anode of the fuel cell stack when the start-up procedure is detected to be executed, and to set the open-circuit voltage.

[0013] The first location information acquisition module is used to acquire the location information of the first battery cell if the voltage value of the first battery cell meets the first preset voltage detection condition within the first preset state holding time, and generate a battery cell internal leakage risk warning based on the location information of the first battery cell.

[0014] The shutdown control module is used to execute shutdown procedures to control the engine to stop and to set a shutdown prohibition.

[0015] According to another aspect of the present invention, a fuel cell vehicle is provided, comprising:

[0016] At least one processor, and

[0017] A memory communicatively connected to the at least one processor; wherein,

[0018] The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform the diagnostic method for a vehicle fuel cell according to any embodiment of the present invention.

[0019] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the diagnostic method for a vehicle fuel cell according to any embodiment of the present invention.

[0020] The technical solution of this invention involves controlling the introduction of air into the cathode and hydrogen into the anode of the fuel cell stack when the start-up procedure is detected, and setting an open-circuit voltage. Then, within a first preset state holding period, if the voltage value of the first stack cell meets the first preset voltage detection condition, the position information of the first stack cell is acquired, and a stack internal leakage risk warning is generated based on the position information of the first stack cell. Finally, a shutdown procedure is executed to control the engine to stop and set a start-prohibition setting. By observing the stability and performance of the open-circuit voltage of each cell during the start-up process, the internal leakage fault can be diagnosed, and the engine can be automatically shut down when an internal leakage fault is determined. This allows for the determination of stack internal leakage risk in actual fuel cell vehicle applications, improving the timeliness of stack internal leakage diagnosis and enabling timely handling of stack internal leakage.

[0021] 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

[0022] 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.

[0023] Figure 1 This is a flowchart of a diagnostic method for a vehicle fuel cell according to Embodiment 1 of the present invention;

[0024] Figure 2 This is a flowchart of a diagnostic method for a vehicle fuel cell according to Embodiment 2 of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of a diagnostic device for a vehicle fuel cell according to Embodiment 3 of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of a fuel cell vehicle that implements the diagnostic method for vehicle fuel cells according to embodiments of the present invention. Detailed Implementation

[0027] 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.

[0028] It should be noted that the terms "first," "second," "target," etc., used 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 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.

[0029] Example 1

[0030] Figure 1 This is a flowchart illustrating a diagnostic method for a vehicle fuel cell according to Embodiment 1 of the present invention. This embodiment is applicable to situations where fuel cell stack internal leakage faults are diagnosed and addressed online in actual vehicle applications. This method can be executed by a vehicle fuel cell diagnostic device, which can be implemented in hardware and / or software. Typically, this vehicle fuel cell diagnostic device can be configured in a fuel cell vehicle. Figure 1 As shown, the method includes:

[0031] S110. When the start-up procedure is detected to be starting, control the supply of air to the cathode of the fuel cell stack and the supply of hydrogen to the anode of the fuel cell stack, and set the open circuit voltage.

[0032] The start-up procedure can be a pre-set program code in the fuel cell vehicle to control the engine start-up. In this embodiment, when the fuel cell engine is detected to be executing the start-up procedure, it indicates that the vehicle has started. At this time, the fuel cell controller can control the introduction of air and hydrogen into the cathode and anode of the fuel cell stack, respectively, and establish an open-circuit voltage. The value of the open-circuit voltage can be preset.

[0033] S120. If the voltage value of the first battery cell meets the first preset voltage detection condition within the first preset state holding time, the position information of the first battery cell is obtained, and a battery cell internal leakage risk warning is generated based on the position information of the first battery cell.

[0034] The preset state holding duration can be a pre-defined timeframe for maintaining the current vehicle state, for example, 10 seconds. During this preset state holding duration, no mode state adjustments are performed. The fuel cell stack can consist of multiple battery cells.

[0035] In this embodiment, after setting the open-circuit voltage, the current vehicle state can be maintained for a certain period of time. During this period, the inspection voltage of each cell in the battery stack can be continuously monitored. Once the voltage value of a certain cell meets the preset voltage detection conditions, it can be determined that there is a risk of internal leakage in the battery stack, and the location information of that cell can be recorded. It is understood that multiple cells may have internal leakage problems at the same time.

[0036] The preset voltage detection conditions can be pre-defined conditions used to determine whether the battery cell has an abnormal voltage. For example, these could be a voltage value less than a preset voltage threshold, an abnormal voltage drop, or a voltage drop rate greater than a preset drop rate threshold. In this embodiment, if the detected voltage value meets the preset voltage detection conditions, it can be determined that the battery cell has an internal leakage problem; if the detected voltage value does not meet the preset voltage detection conditions, it can be determined that the battery cell is normal.

[0037] Specifically, after determining that a current solar cell has an internal leakage risk, the location information of the current solar cell can be obtained based on its identifier and a preset correspondence between solar cell identifiers and location information. After obtaining the location information of each solar cell with an internal leakage risk, a stack internal leakage risk warning can be generated based on a preset information template and the location information. This warning can then be displayed to the user, using methods such as text or audio.

[0038] Optionally, detecting that the voltage value of the first battery cell in the stack meets the first preset voltage detection condition may include:

[0039] If a drop in the voltage of the first battery cell is detected, or if the voltage of the first battery cell is detected to be less than or equal to a first preset voltage threshold, then it is determined that the voltage of the first battery cell meets the first preset voltage detection condition.

[0040] In a specific example, the first preset voltage detection condition could be a voltage drop in the battery cell stack (ΔVn≤0), or a voltage value less than or equal to a first preset voltage threshold (Vn≤a). Typically, the first preset voltage threshold could be 0.9 volts.

[0041] S130, Execute the shutdown procedure to control the engine to stop and set a no-start rule.

[0042] Specifically, when an internal leakage risk is detected in the fuel cell stack, the engine can be controlled to execute a preset shutdown procedure to stop the engine and set the vehicle to be prevented from starting, pending return to the factory for inspection and repair.

[0043] The technical solution of this invention involves controlling the introduction of air into the cathode and hydrogen into the anode of the fuel cell stack when the start-up procedure is detected, and setting an open-circuit voltage. Then, within a first preset state holding period, if the voltage value of the first stack cell meets the first preset voltage detection condition, the position information of the first stack cell is acquired, and a stack internal leakage risk warning is generated based on the position information of the first stack cell. Finally, a shutdown procedure is executed to control the engine to stop and set a start-prohibition setting. By observing the stability and performance of the open-circuit voltage of each cell during the start-up process, the internal leakage fault can be diagnosed, and the engine can be automatically shut down when an internal leakage fault is determined. This allows for the determination of stack internal leakage risk in actual fuel cell vehicle applications, improving the timeliness of stack internal leakage diagnosis and enabling timely handling of stack internal leakage.

[0044] In an optional implementation of this embodiment, after setting the open-circuit voltage, the following may also be included:

[0045] If, within the duration of the first preset state, the voltage values ​​of each battery cell in the stack do not meet the first preset voltage detection condition, a power load-pull procedure is executed to control the start-up of the fuel cell vehicle.

[0046] In this embodiment, if the inspection voltage value of each battery cell does not meet the first preset voltage detection condition within the preset state holding time, it indicates that there is no risk of internal leakage in the stack. At this time, the preset power load program can be executed normally to increase the output power of the fuel cell and thus control the start-up of the fuel cell vehicle.

[0047] Example 2

[0048] Figure 2 This is a flowchart of a diagnostic method for a vehicle fuel cell provided in Embodiment 2 of the present invention. This embodiment is a further refinement of the above technical solution, and the technical solution in this embodiment can be combined with one or more of the above implementation methods. Figure 2 As shown, the method includes:

[0049] S210. When the shutdown procedure is detected to be starting, control to stop the air supply to the cathode of the fuel cell stack and maintain the hydrogen supply to the anode of the fuel cell stack.

[0050] In this embodiment, the risk of internal leakage of the fuel cell stack can also be diagnosed during the shutdown process; specifically, when the engine is detected to start executing the preset shutdown procedure, the input of air to the cathode of the fuel cell stack can be stopped, while the input of hydrogen to the anode of the fuel cell stack can be maintained.

[0051] S220. If the voltage value of the second battery cell meets the second preset voltage detection condition within the second preset state holding time, the position information of the second battery cell is obtained, and a battery cell internal leakage risk warning is generated based on the position information of the second battery cell, and startup is prohibited.

[0052] The second preset state holding duration can be a preset duration for maintaining the current state. During this preset state holding duration, no mode state transition is performed. Typically, the second preset state holding duration can be 60 seconds.

[0053] In this embodiment, during the second preset state holding period, the inspection voltage of each cell in the fuel cell stack is continuously monitored. If the inspection voltage value of a certain cell meets the preset voltage detection conditions, it can be determined that the detected cell has an internal leakage problem, and the fuel cell stack is judged to have an internal leakage risk. At this time, the location information of the detected cell can be obtained according to the identifier of the detected cell and the preset correspondence between the cell identifier and the location information. Then, the location information of the detected cell can be filled into a preset information template to generate a fuel cell stack internal leakage risk warning. Finally, after determining that the fuel cell stack has an internal leakage risk, the vehicle can be set to prevent starting, so as to prevent the fuel cell vehicle from starting again and wait for return to the factory for inspection and maintenance.

[0054] The detection that the voltage value of the second battery cell meets the second preset voltage detection condition may include:

[0055] If the voltage drop rate of the second battery cell is detected to be greater than or equal to a preset rate threshold, or the voltage of the second battery cell is less than or equal to a second preset voltage threshold, then the voltage of the second battery cell is determined to meet the second preset voltage detection condition.

[0056] In a specific example, the second preset voltage detection condition can be that the voltage drop rate is greater than or equal to a preset rate threshold (ΔVn / Δt≥b), or the voltage value is less than or equal to the second preset voltage threshold (Vn≤c). Typically, the preset rate threshold can be 15 millivolts per second, and the second preset voltage threshold can be 0.2 volts.

[0057] The technical solution of this invention, when the shutdown procedure is detected to be starting, controls the air supply to the cathode of the fuel cell stack to stop while maintaining the hydrogen supply to the anode. Then, within a second preset state holding period, if the voltage value of the second stack cell meets the second preset voltage detection condition, the position information of the second stack cell is obtained, and a stack internal leakage risk warning is generated based on the position information of the second stack cell, and startup is prohibited. By observing the rate of decrease and performance of the venting voltage of each cell during the shutdown process, the internal leakage fault can be diagnosed, and the next startup is prohibited when an internal leakage fault is determined. This allows for the determination of stack internal leakage risk in actual fuel cell vehicle applications, further improving the timeliness of stack internal leakage diagnosis and enabling timely handling of stack internal leakage.

[0058] In an optional embodiment of this example, after maintaining the hydrogen supply to the anode of the fuel cell stack, the following may also be included:

[0059] If, within the duration of the second preset state, the voltage values ​​of each battery cell in the stack do not meet the second preset voltage detection condition, the shutdown procedure will continue to be executed to control the engine to shut down.

[0060] In this embodiment, if the venting voltage value of each battery cell does not meet the preset voltage detection condition within the preset state holding time, it can be determined that there is no risk of internal leakage in the battery stack. At this time, the preset shutdown procedure can continue to be executed to control the normal shutdown of the engine, without having to set a prohibition on starting.

[0061] The technical solution of this embodiment determines whether there is a risk of internal leakage in the battery stack by checking the inspection voltage of each battery cell during the start-up or shutdown process. This can achieve online detection of internal leakage problems in the battery stack without adding new components or increasing hardware costs.

[0062] Example 3

[0063] Figure 3 This is a schematic diagram of a diagnostic device for a vehicle fuel cell provided in Embodiment 3 of the present invention. Figure 3 As shown, the device includes: an open-circuit voltage setting module 310, a first position information acquisition module 320, and a shutdown control module 330; wherein,

[0064] The open-circuit voltage setting module 310 is used to control the introduction of air into the cathode of the fuel cell stack and the introduction of hydrogen into the anode of the fuel cell stack when the start-up procedure is detected to be executed, and to set the open-circuit voltage.

[0065] The first location information acquisition module 320 is used to acquire the location information of the first battery cell if the voltage value of the first battery cell meets the first preset voltage detection condition within the first preset state holding time, and generate a battery cell internal leakage risk warning based on the location information of the first battery cell.

[0066] The shutdown control module 330 is used to execute a shutdown procedure to control the engine to shut down and to set a shutdown prohibition.

[0067] Optionally, the diagnostic device for the vehicle fuel cell further includes:

[0068] The supply control module is used to control the shutdown of the air supply to the cathode of the fuel cell stack and maintain the hydrogen supply to the anode of the fuel cell stack when the shutdown procedure is detected to be starting to execute.

[0069] The second location information acquisition module is used to acquire the location information of the second battery cell if the voltage value of the second battery cell meets the second preset voltage detection condition within the second preset state holding time, generate a battery cell internal leakage risk warning based on the location information of the second battery cell, and set to prohibit startup.

[0070] The technical solution of this invention involves controlling the introduction of air into the cathode and hydrogen into the anode of the fuel cell stack when the start-up procedure is detected, and setting an open-circuit voltage. Then, within a first preset state holding period, if the voltage value of the first stack cell meets the first preset voltage detection condition, the position information of the first stack cell is acquired, and a stack internal leakage risk warning is generated based on the position information of the first stack cell. Finally, a shutdown procedure is executed to control the engine to stop and set a start-prohibition setting. By observing the stability and performance of the open-circuit voltage of each cell during the start-up process, the internal leakage fault can be diagnosed, and the engine can be automatically shut down when an internal leakage fault is determined. This allows for the determination of stack internal leakage risk in actual fuel cell vehicle applications, improving the timeliness of stack internal leakage diagnosis and enabling timely handling of stack internal leakage.

[0071] Optionally, the first location information acquisition module 320 is specifically used to determine that the voltage value of the first battery cell meets the first preset voltage detection condition if a decrease in the voltage value of the first battery cell is detected, or if the voltage value of the first battery cell is detected to be less than or equal to a first preset voltage threshold.

[0072] Optionally, the diagnostic device for the vehicle fuel cell further includes:

[0073] The start control module is used to execute a power load program to control the start of the fuel cell vehicle if the voltage value of each battery cell in the stack does not meet the first preset voltage detection condition within the first preset state holding time.

[0074] Optionally, the second location information acquisition module is specifically used to determine that the voltage value of the second battery cell meets the second preset voltage detection condition if the voltage drop rate of the second battery cell is detected to be greater than or equal to a preset rate threshold, or the voltage value of the second battery cell is less than or equal to a second preset voltage threshold.

[0075] Optionally, the diagnostic device for the vehicle fuel cell further includes:

[0076] The shutdown procedure continuation module is used to continue executing the shutdown procedure to control the engine to shut down if, within the second preset state holding time, the voltage value of each battery cell in the stack does not meet the second preset voltage detection condition.

[0077] The vehicle fuel cell diagnostic device provided in this embodiment of the invention can execute the vehicle fuel cell diagnostic method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of executing the method.

[0078] Example 4

[0079] Figure 4 A schematic diagram of the structure of a fuel cell vehicle 40 that can be used to implement an embodiment of the present invention is shown. Figure 4 As shown, the fuel cell vehicle 40 includes at least one processor 41 and a memory, such as a read-only memory (ROM) 42 and a random access memory (RAM) 43, communicatively connected to the at least one processor 41. The memory stores computer programs executable by the at least one processor. The processor 41 can perform various appropriate actions and processes based on the computer program stored in the ROM 42 or loaded from storage unit 48 into the RAM 43. The RAM 43 can also store various programs and data required for the operation of the fuel cell vehicle 40. The processor 41, ROM 42, and RAM 43 are interconnected via a bus 44. An input / output (I / O) interface 45 is also connected to the bus 44.

[0080] Multiple components in the fuel cell vehicle 40 are connected to the I / O interface 45, including: an input unit 46; an output unit 47, such as various types of displays, speakers, etc.; a storage unit 48, such as a disk, optical disk, etc.; and a communication unit 49, such as a network card, modem, wireless transceiver, etc. The communication unit 49 allows the fuel cell vehicle 40 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0081] Processor 41 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 41 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 41 performs the various methods and processes described above, such as diagnostic methods for vehicle fuel cells.

[0082] In some embodiments, the diagnostic method for a vehicle fuel cell may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 48. In some embodiments, part or all of the computer program may be loaded into and / or installed on the fuel cell vehicle 40 via ROM 42 and / or communication unit 49. When the computer program is loaded into RAM 43 and executed by processor 41, one or more steps of the diagnostic method for a vehicle fuel cell described above may be performed. Alternatively, in other embodiments, processor 41 may be configured to perform the diagnostic method for a vehicle fuel cell by any other suitable means (e.g., by means of firmware).

[0083] 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.

[0084] 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.

[0085] 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.

[0086] To provide interaction with the user, the systems and technologies described herein can be implemented in a fuel cell vehicle having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor for displaying information to the user. 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).

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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 diagnostic method for a vehicle fuel cell, characterized in that, include: When the start-up procedure is detected to begin execution, air is introduced into the cathode of the fuel cell stack, hydrogen is introduced into the anode of the fuel cell stack, and the open-circuit voltage is set. If the voltage value of the first battery cell meets the first preset voltage detection condition within the first preset state holding time, the position information of the first battery cell is obtained, and a battery cell internal leakage risk warning is generated based on the position information of the first battery cell. Execute the shutdown procedure to control the engine to stop and set a no-start rule.

2. The method according to claim 1, characterized in that, The voltage value of the first battery cell in the stack is detected to meet the first preset voltage detection condition, including: If a drop in the voltage of the first battery cell is detected, or if the voltage of the first battery cell is detected to be less than or equal to a first preset voltage threshold, then it is determined that the voltage of the first battery cell meets the first preset voltage detection condition.

3. The method according to claim 1, characterized in that, After setting the open-circuit voltage, the following is also included: If, within the duration of the first preset state, the voltage values ​​of each battery cell in the stack do not meet the first preset voltage detection condition, a power load-pull procedure is executed to control the start-up of the fuel cell vehicle.

4. The method according to claim 1, characterized in that, Also includes: When the shutdown procedure is detected to be starting, the air supply to the cathode of the fuel cell stack is stopped, while the hydrogen supply to the anode of the fuel cell stack is maintained. If, within the duration of the second preset state, the voltage value of the second battery cell meets the second preset voltage detection condition, the location information of the second battery cell is obtained, and a battery cell internal leakage risk warning is generated based on the location information of the second battery cell, and startup is prohibited.

5. The method according to claim 4, characterized in that, The voltage value of the second battery cell stack is detected to meet the second preset voltage detection condition, including: If the voltage drop rate of the second battery cell is detected to be greater than or equal to a preset rate threshold, or the voltage of the second battery cell is less than or equal to a second preset voltage threshold, then the voltage of the second battery cell is determined to meet the second preset voltage detection condition.

6. The method according to claim 4, characterized in that, After maintaining the hydrogen supply to the anode of the fuel cell stack, the following is also included: If, within the duration of the second preset state, the voltage values ​​of each battery cell in the stack do not meet the second preset voltage detection condition, the shutdown procedure will continue to be executed to control the engine to shut down.

7. A diagnostic device for a vehicle fuel cell, characterized in that, include: The open-circuit voltage setting module is used to control the flow of air to the cathode of the fuel cell stack and hydrogen to the anode of the fuel cell stack when the start-up procedure is detected to be executed, and to set the open-circuit voltage. The first location information acquisition module is used to acquire the location information of the first battery cell if the voltage value of the first battery cell meets the first preset voltage detection condition within the first preset state holding time, and generate a battery cell internal leakage risk warning based on the location information of the first battery cell. The shutdown control module is used to execute shutdown procedures to control the engine to stop and to set a shutdown prohibition.

8. The apparatus according to claim 7, characterized in that, Also includes: The supply control module is used to control the shutdown of the air supply to the cathode of the fuel cell stack and maintain the hydrogen supply to the anode of the fuel cell stack when the shutdown procedure is detected to be starting to execute. The second location information acquisition module is used to acquire the location information of the second battery cell if the voltage value of the second battery cell meets the second preset voltage detection condition within the second preset state holding time, generate a battery cell internal leakage risk warning based on the location information of the second battery cell, and set to prohibit startup.

9. A fuel cell vehicle, characterized in that, include: At least one processor, and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, which enables the at least one processor to perform the diagnostic method for the vehicle fuel cell according to any one of claims 1-6.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the diagnostic method for a vehicle fuel cell according to any one of claims 1-6.

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