Fuel cell engine cold start method and device, vehicle and medium

Abstract

The invention discloses a fuel cell engine cold start method and device, a vehicle and a medium, and relates to the technical field of fuel cells. The method comprises the following steps: when detecting that a fuel cell engine of a target vehicle needs cold start according to the environment temperature of the environment where the target vehicle is located, obtaining the lowest monolithic voltage of a fuel cell stack; controlling the output current of the fuel cell engine according to the lowest monolithic voltage and a first preset voltage; and controlling the cathode flow of the fuel cell stack according to the lowest monolithic voltage, the average monolithic voltage of the fuel cell stack, the first preset voltage, the second preset voltage and the third preset voltage, wherein the first preset voltage is smaller than the third preset voltage, and the third preset voltage is smaller than the second preset voltage. By means of the technical scheme, it can be guaranteed that cold start of the fuel cell engine is completed smoothly.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to a fuel cell engine cold start method, device, vehicle and medium. Background Art

[0002] Hydrogen fuel cell engines use the reaction between hydrogen and oxygen to directly convert chemical energy into electrical energy. Due to their high energy conversion efficiency and zero pollution, the cold start performance of fuel cells is key to their commercialization and large-scale promotion.

[0003] Most currently available technologies use multi-level control of the cathode stoichiometry ratio using voltage and minimum monolithic voltage. Furthermore, once the fuel cell engine reaches a stable state, the state remains unchanged, making it impossible to control the fuel cell engine in real time based on the varying fuel cell temperatures. Therefore, an efficient cold-start method for fuel cell engines is urgently needed. Summary of the Invention

[0004] The present invention provides a fuel cell engine cold start method, device, vehicle and medium to avoid the occurrence of fuel cell reverse polarity and ensure smooth completion of the fuel cell engine cold start.

[0005] According to one aspect of the present invention, a fuel cell engine cold start method is provided, the method comprising:

[0006] When it is detected that the fuel cell engine of the target vehicle needs to be cold started according to the ambient temperature of the environment in which the target vehicle is located, obtaining the minimum single-chip voltage of the fuel cell stack;

[0007] controlling an output current of the fuel cell engine according to the minimum single-chip voltage and a first preset voltage;

[0008] The cathode flow of the fuel cell stack is controlled based on the minimum single-chip voltage, the average single-chip voltage of the fuel cell stack, the first preset voltage, the second preset voltage and the third preset voltage; wherein the first preset voltage is less than the third preset voltage, and the third preset voltage is less than the second preset voltage.

[0009] According to another aspect of the present invention, a fuel cell engine cold start device is provided, the device comprising:

[0010] A minimum single-chip voltage acquisition module is used to obtain the minimum single-chip voltage of the fuel cell stack when it is detected that the fuel cell engine of the target vehicle needs to be cold-started based on the ambient temperature of the environment in which the target vehicle is located;

[0011] an output current control module, configured to control the output current of the fuel cell engine according to the minimum single-chip voltage and a first preset voltage;

[0012] A cathode flow control module is used to control the cathode flow of the fuel cell stack based on the minimum single-chip voltage, the average single-chip voltage of the fuel cell stack, the first preset voltage, the second preset voltage and the third preset voltage; wherein the first preset voltage is less than the third preset voltage, and the third preset voltage is less than the second preset voltage.

[0013] According to another aspect of the present invention, there is provided a vehicle, comprising:

[0014] at least one processor; and

[0015] a memory communicatively connected to the at least one processor; wherein,

[0016] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the fuel cell engine cold start method according to any embodiment of the present invention.

[0017] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions for enabling a processor to implement the fuel cell engine cold start method according to any embodiment of the present invention when executed.

[0018] According to another aspect of the present invention, a computer program product is provided. The computer program product includes a computer program. When the computer program is executed by a processor, the computer program implements the cold start method for a fuel cell engine according to any embodiment of the present invention.

[0019] The technical solution of the embodiment of the present invention is to obtain the minimum single-chip voltage of the fuel cell stack when it is detected that the fuel cell engine of the target vehicle needs to be cold-started based on the ambient temperature of the target vehicle's environment; control the output current of the fuel cell engine based on the minimum single-chip voltage and a first preset voltage; and control the cathode flow of the fuel cell stack based on the minimum single-chip voltage, the average single-chip voltage of the fuel cell stack, the first preset voltage, the second preset voltage, and the third preset voltage; wherein the first preset voltage is less than the third preset voltage, and the third preset voltage is less than the second preset voltage. The above technical solution can avoid the occurrence of fuel cell reverse polarity by real-time control of the fuel cell engine current and cathode flow, while maximizing heat generation, which is beneficial to protecting the fuel cell engine and ensuring the smooth completion of the fuel cell engine cold start.

[0020] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a flow chart of a cold start method for a fuel cell engine provided according to an embodiment of the present invention;

[0023] Figure 2 This is a flow chart of a cold start method for a fuel cell engine provided according to an embodiment of the present invention;

[0024] Figure 3 2 is a schematic structural diagram of a cold starting device for a fuel cell engine according to an embodiment of the present invention;

[0025] Figure 4 It is a structural schematic diagram of an electronic device for implementing the cold starting method of a fuel cell engine according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] In addition, it should be noted that the collection, storage, use, processing, transmission, provision and disclosure of fuel cell engine-related data involved in the technical solution of the present invention are in compliance with the provisions of relevant laws and regulations and do not violate public order and good morals.

[0029] Figure 1 This is a flow chart of a fuel cell engine cold start method according to an embodiment of the present invention. This embodiment is applicable to cold starting fuel cell engines, particularly those in commercial vehicles. This method can be performed by a fuel cell engine cold start device, which can be implemented in hardware and / or software. The device can be configured in an electronic device that performs fuel cell engine cold start functions, such as a controller in a commercial vehicle.

[0030] like Figure 1 As shown, the method includes:

[0031] S110 : When it is detected that the fuel cell engine of the target vehicle needs to be cold-started based on the ambient temperature of the environment in which the target vehicle is located, obtaining the lowest single-chip voltage of the fuel cell stack.

[0032] In this embodiment, the target vehicle refers to a vehicle that needs to be cold started, preferably a commercial vehicle.

[0033] Specifically, if the ambient temperature of the target vehicle's environment is detected to be lower than a preset temperature value, the target vehicle's fuel cell engine is determined to require a cold start. The preset temperature value can be adaptively adjusted, for example, to 0°C. If the ambient temperature is higher than the preset temperature value, the target vehicle is controlled to start normally.

[0034] It should be noted that the fuel cell engine cold start judgment condition can be set as a limit condition according to demand. When the limit condition is met, it is determined that the fuel cell engine needs to be cold started. This embodiment is only an example.

[0035] S120 : Control the output current of the fuel cell engine according to the lowest single-chip voltage and the first preset voltage.

[0036] The first preset voltage is the minimum operating voltage of the fuel cell. The so-called minimum single-cell voltage refers to the voltage corresponding to the cell with the lowest voltage among the cells in the fuel cell stack.

[0037] An optional method for controlling the output current of a fuel cell engine based on a minimum single-chip voltage and a first preset voltage includes: determining a voltage difference between the minimum single-chip voltage and the first preset voltage to obtain a voltage error; processing the voltage error through a PID controller to obtain a target current of the fuel cell engine; and controlling the output current of the fuel cell engine based on the target current.

[0038] The target voltage is the current corresponding to the fuel cell at the first preset voltage.

[0039] Specifically, the lowest single-chip voltage of the fuel cell is detected and obtained, the voltage difference between the first preset voltage and the lowest single-chip voltage is calculated, and the voltage difference is input into the PID controller for processing to obtain the target current of the fuel cell engine, and the output current of the fuel cell engine is controlled to reach the target current as much as possible. The calculation formula of the PID controller is as follows:

[0040]

[0041] Where, Output is the target current of PID; e(t) represents the voltage difference; K p is the proportionality coefficient, K i is the integration coefficient, K d is the integration coefficient.

[0042] It can be understood that among the parameters of the PID controller, the proportional control K p Control the fuel cell current value load or load reduction rate, K p If it is larger, the fuel cell current value changes faster, but it is easy to overcharge; integral control K i Used to eliminate errors and stabilize the lowest single-chip voltage at the first preset voltage; differential control K d The error change is predicted to prevent the current from changing too much, and is suitable for reducing the rate of change of the fuel cell current value when the lowest single-chip voltage is close to the first preset voltage.

[0043] In addition, it should be noted that in a low-temperature environment, when the fuel cell outputs a large current, the fuel cell stack voltage will be lower. At this time, the fuel cell stack will have a greater self-heating power, which is beneficial to increase the coolant temperature and accelerate cold start. Therefore, when the monolithic voltage consistency is good, the fuel cell engine voltage will approach the first preset voltage, thereby increasing the fuel cell engine current, reducing the fuel cell engine voltage, increasing the heat generation of the fuel cell stack, and accelerating the cold start of the fuel cell engine. When some monolithic voltages are low and the state is poor, the lower voltage will increase the heat generation of these monolithic voltages, which is beneficial to their performance improvement and can avoid reverse polarity.

[0044] S130 , controlling the cathode flow of the fuel cell stack according to the lowest single-chip voltage, the average single-chip voltage of the fuel cell stack, the first preset voltage, the second preset voltage, and the third preset voltage.

[0045] The first preset voltage is smaller than the third preset voltage, and the third preset voltage is smaller than the second preset voltage; the second preset voltage and the third preset voltage can be adaptively adjusted.

[0046] Specifically, based on the cathode flow determination model, the minimum single-chip voltage, the average single-chip voltage of the fuel cell stack, the first preset voltage, the second preset voltage and the third preset voltage can be input into the cathode flow determination model to obtain the target cathode flow, and the cathode flow of the fuel cell stack can be controlled based on the target cathode flow, for example, the cathode flow of the fuel cell stack is controlled to be the target cathode flow.

[0047] Furthermore, after controlling the cathode flow of the fuel cell stack based on the minimum single-chip voltage, the average single-chip voltage of the fuel cell stack, the first preset voltage, the second preset voltage, and the third preset voltage, the method further includes: determining whether to exit the cold start based on the real-time temperature of the coolant at the fuel cell stack inlet. Specifically, if the real-time temperature of the coolant at the fuel cell stack inlet is detected to be greater than a second temperature threshold, then the cold start is determined to be exited. The second temperature threshold can be set by those skilled in the art based on actual conditions, for example, 0°C.

[0048] The technical solution of the embodiment of the present invention is to obtain the minimum single-chip voltage of the fuel cell stack when it is detected that the fuel cell engine of the target vehicle needs to be cold-started based on the ambient temperature of the target vehicle's environment; control the output current of the fuel cell engine based on the minimum single-chip voltage and a first preset voltage; and control the cathode flow of the fuel cell stack based on the minimum single-chip voltage, the average single-chip voltage of the fuel cell stack, the first preset voltage, the second preset voltage, and the third preset voltage; wherein the first preset voltage is less than the third preset voltage, and the third preset voltage is less than the second preset voltage. The above technical solution can avoid the occurrence of fuel cell reverse polarity by real-time control of the fuel cell engine current and cathode flow, while maximizing heat generation, which is beneficial to protecting the fuel cell engine and ensuring the smooth completion of the fuel cell engine cold start.

[0049] Figure 2 This is a flow chart of a cold start method for a fuel cell engine according to an embodiment of the present invention. Based on the above embodiment, this embodiment further optimizes the "controlling the cathode flow of the fuel cell stack according to the minimum single-chip voltage, the average single-chip voltage of the fuel cell stack, the first preset voltage, the second preset voltage and the third preset voltage" and provides an optional implementation scheme. Figure 2 As shown, the method includes:

[0050] S210 : When it is detected that the fuel cell engine of the target vehicle needs to be cold-started based on the ambient temperature of the environment in which the target vehicle is located, obtaining the lowest single-chip voltage of the fuel cell stack.

[0051] It should be noted that after determining that the fuel cell engine needs a cold start, the cathode flow target value is obtained through the cathode flow preset chart, and the cathode flow of the fuel cell stack is controlled to reach the target value.

[0052] S220 : Control the output current of the fuel cell engine according to the lowest single-chip voltage and the first preset voltage.

[0053] Specifically, the voltage difference between the lowest single-chip voltage and a first preset voltage is determined to obtain a voltage error; the voltage error is processed using a PID controller to obtain a target current for the fuel cell engine; and the output current of the fuel cell engine is controlled based on the target current. Specifically, a determination is made as to whether the lowest single-chip voltage is greater than the first preset voltage. If so, the PID output is used to increase the output current to the target current; if not, the PID output is used to decrease the output current to the target current.

[0054] S230: Determine a first voltage range according to a first preset voltage and a first threshold.

[0055] Specifically, the first threshold value is subtracted from the first preset voltage to obtain the minimum value of the first voltage range, and the first threshold value is added to the first preset voltage to obtain the maximum value of the first voltage range. The first threshold value can be adaptively adjusted or adjusted by those skilled in the art according to actual conditions. For example, if the voltage is 300mV lower than the preset voltage and the first threshold value is 50mV, the first voltage range is (250, 350).

[0056] S240: Determine whether the duration during which the lowest single-chip voltage is within the first voltage range is greater than a first time threshold.

[0057] The first time threshold is adjusted adaptively or by those skilled in the art according to actual conditions, for example, 15s.

[0058] S250: If the duration is greater than the first time threshold, detect and obtain the average single-chip voltage, and control the cathode flow of the fuel cell stack according to the average single-chip voltage, the second preset voltage and the third preset voltage.

[0059] The average single-cell voltage refers to the average voltage of each cell in the fuel cell stack.

[0060] Specifically, if the duration is greater than a first time threshold, the cathode flow rate of the fuel cell stack can be dynamically controlled based on the relationship between the average single-cell voltage and the second and third preset voltages. If the duration is less than or equal to the first time threshold, the determination is continued as to whether the lowest single-cell voltage is greater than the first preset voltage.

[0061] An optional method is to control the cathode flow of the fuel cell stack by the average single-chip voltage, the second preset voltage and the third preset voltage, including: judging whether the average single-chip voltage is greater than the second preset voltage; if so, reducing the cathode flow; if not, judging whether the average single-chip voltage is less than the third preset voltage; if less than, querying the cathode flow preset chart according to the initial temperature and real-time temperature of the coolant at the inlet of the fuel cell stack, and controlling the cathode flow to increase; otherwise, controlling the cathode flow to remain unchanged.

[0062] Specifically, determine whether the average single-chip voltage is greater than the second preset voltage. If so, reduce the cathode flow rate, and continue to determine the real-time temperature of the coolant entering the stack to determine whether to exit the cold start; if not, determine whether the average single-chip voltage is less than the third preset voltage; if less than, query the cathode flow preset chart according to the initial temperature and real-time temperature of the coolant at the inlet of the fuel cell stack, control the cathode flow rate to increase, that is, query the cathode flow preset chart according to the initial temperature and real-time temperature of the coolant at the inlet of the fuel cell stack to obtain the corresponding target cathode flow rate, control the cathode flow rate to increase to the target cathode flow rate, and continue to determine the real-time temperature of the coolant entering the stack to determine whether to exit the cold start; if greater than or equal to, control the cathode flow rate unchanged, and continue to determine the real-time temperature of the coolant entering the stack to determine whether to exit the cold start.

[0063] The cathode flow preset chart is obtained by conducting cold start tests on a fuel cell engine at different low temperatures.

[0064] It should be noted that the second preset voltage is set to prevent a large discrepancy between the minimum single-chip voltage and the average single-chip voltage. If the average single-chip voltage is greater than the second preset voltage, the cathode flow rate needs to be reduced to reduce the average single-chip voltage to prevent a large discrepancy between the single-chip voltages and damage to the fuel cell engine. The third preset voltage is used to detect the consistency of the fuel cell single-chip voltages. If the average single-chip voltage is less than the third preset voltage, it indicates that the single-chip voltage consistency is good. The cathode flow rate preset chart can be consulted to increase the cathode flow rate, thereby increasing the fuel cell engine current and accelerating startup. For example, the second preset voltage is 450mV and the third preset voltage is 350mV. These settings can be adjusted based on actual conditions.

[0065] The technical solution provided by the embodiment of the present invention determines a first voltage range based on a first preset voltage and a first threshold; determines whether the duration of the lowest single-chip voltage being in the first voltage range is greater than a first time threshold; if the duration is greater than the first time threshold, detects and obtains the average single-chip voltage, and controls the cathode flow of the fuel cell stack based on the average single-chip voltage, the second preset voltage, and the third preset voltage. The above technical solution controls the fuel cell engine current value through the lowest single-chip voltage, and controls the cathode flow based on the average single-chip voltage, the second preset voltage, and the third preset voltage; by controlling the fuel cell engine current and cathode flow in real time, the occurrence of fuel cell reverse polarity can be avoided; at the same time, maximizing heat generation is beneficial to protecting the fuel cell engine and ensuring a smooth cold start of the fuel cell engine.

[0066] Figure 3 This is a schematic diagram of the structure of a fuel cell engine cold start device provided according to an embodiment of the present invention. This embodiment is applicable to the situation of how to cold start a fuel cell engine, and is particularly applicable to the situation of cold starting a fuel cell engine in a commercial vehicle. The device can be implemented in the form of hardware and / or software, and can be configured in an electronic device that carries the fuel cell engine cold start function, such as a controller in a commercial vehicle. Figure 3 As shown, the device includes:

[0067] The minimum single-chip voltage acquisition module 310 is used to acquire the minimum single-chip voltage of the fuel cell stack when it is detected that the fuel cell engine of the target vehicle needs to be cold-started according to the ambient temperature of the environment in which the target vehicle is located;

[0068] an output current control module 320 for controlling the output current of the fuel cell engine according to the minimum single-chip voltage and the first preset voltage;

[0069] The cathode flow control module 330 is used to control the cathode flow of the fuel cell stack based on the minimum single-chip voltage, the average single-chip voltage of the fuel cell stack, the first preset voltage, the second preset voltage and the third preset voltage; wherein the first preset voltage is less than the third preset voltage, and the third preset voltage is less than the second preset voltage.

[0070] The technical solution of the embodiment of the present invention is to obtain the minimum single-chip voltage of the fuel cell stack when it is detected that the fuel cell engine of the target vehicle needs to be cold-started based on the ambient temperature of the target vehicle's environment; control the output current of the fuel cell engine based on the minimum single-chip voltage and a first preset voltage; and control the cathode flow of the fuel cell stack based on the minimum single-chip voltage, the average single-chip voltage of the fuel cell stack, the first preset voltage, the second preset voltage, and the third preset voltage; wherein the first preset voltage is less than the third preset voltage, and the third preset voltage is less than the second preset voltage. The above technical solution can avoid the occurrence of fuel cell reverse polarity by real-time control of the fuel cell engine current and cathode flow, while maximizing heat generation, which is beneficial to protecting the fuel cell engine and ensuring the smooth completion of the fuel cell engine cold start.

[0071] Optionally, the output current control module 320 is configured to:

[0072] Determine the voltage difference between the lowest single-chip voltage and a first preset voltage to obtain a voltage error; wherein the first preset voltage is the lowest operating voltage of the fuel cell;

[0073] The voltage error is processed by the PID controller to obtain the target current of the fuel cell engine;

[0074] The output current of the fuel cell engine is controlled according to the target current.

[0075] Optionally, the cathode flow control module 330 is used to:

[0076] Determining a first voltage range according to a first preset voltage and a first threshold;

[0077] Determining whether a duration during which the lowest single-chip voltage is within the first voltage range is greater than a first time threshold;

[0078] If the duration is greater than the first time threshold, the average single-chip voltage is detected and obtained, and the cathode flow of the fuel cell stack is controlled by the average single-chip voltage, the second preset voltage and the third preset voltage.

[0079] Optionally, the cathode flow control module 330 is specifically configured to:

[0080] Determining whether the average single-chip voltage is greater than a second preset voltage;

[0081] If so, reduce the cathode flow rate;

[0082] If not, determining whether the average single-chip voltage is less than a third preset voltage;

[0083] If it is less than, the cathode flow preset chart is queried according to the initial temperature and real-time temperature of the coolant at the fuel cell stack inlet, and the cathode flow is controlled to increase; otherwise, the cathode flow is controlled to remain unchanged.

[0084] Optionally, the cathode flow preset chart is obtained by performing cold start tests on a fuel cell engine at different low temperatures.

[0085] Optionally, the device further includes a cold start exit module, configured to:

[0086] After controlling the cathode flow of the fuel cell stack based on the minimum single-chip voltage, the average single-chip voltage of the fuel cell stack, the first preset voltage, the second preset voltage and the third preset voltage, it is determined whether to exit the cold start based on the real-time temperature of the coolant at the fuel cell stack inlet.

[0087] Optionally, the target vehicle is a commercial vehicle.

[0088] The fuel cell engine cold starting device provided in the embodiment of the present invention can execute the fuel cell engine cold starting method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0089] According to an embodiment of the present invention, the present invention further provides an electronic device, a readable storage medium and a computer program product.

[0090] Figure 4 It is a structural schematic diagram of an electronic device for implementing the cold starting method of a fuel cell engine according to an embodiment of the present invention. Figure 4 A schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment 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 processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0091] like Figure 4As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., which is communicatively connected to the at least one processor 11. The memory stores a computer program that can be executed by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. Various programs and data required for the operation of the electronic device 10 can also be stored in the RAM 13. The processor 11, ROM 12, and RAM 13 are connected to each other via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0092] Multiple components in the electronic device 10 are connected to the I / O interface 15, including an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a magnetic disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0093] The processor 11 can be any general-purpose and / or specialized processing component with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the fuel cell engine cold start method.

[0094] In some embodiments, the fuel cell engine cold start method can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the fuel cell engine cold start method described above can be performed. Alternatively, in other embodiments, the processor 11 can be configured to execute the fuel cell engine cold start method in any other appropriate manner (for example, by means of firmware).

[0095] Various embodiments of the systems and techniques described 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), system-on-chip systems (SOCs), programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that are executable and / or interpreted on a programmable system that includes at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0096] Computer programs for implementing 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 the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0097] In the context of the present invention, computer-readable storage media can be tangible media that can contain or store a computer program for use with an instruction execution system, device or equipment or used in combination with an instruction execution system, device or equipment. Computer-readable storage media can include but are not limited to electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, computer-readable storage media can be machine-readable signal media. More specific examples of machine-readable storage media can include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0098] 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 can provide input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, the 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 acoustic input, voice input, or tactile input).

[0099] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0100] A computing system may include clients and servers. The clients and servers are typically remote from each other and typically interact via a communication network. This client-server relationship arises through computer programs running on the respective computers, creating a client-server relationship. The server may be a cloud server, also known as a cloud computing server or cloud host. This server is a hosting product within the cloud computing service ecosystem that addresses the management difficulties and limited scalability of traditional physical hosting and VPS services.

[0101] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0102] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A fuel cell engine cold start method, characterized in that: include: When it is detected that the fuel cell engine of the target vehicle needs to be cold started according to the ambient temperature of the environment in which the target vehicle is located, obtaining the minimum single-chip voltage of the fuel cell stack; controlling an output current of the fuel cell engine according to the minimum single-chip voltage and a first preset voltage; The cathode flow of the fuel cell stack is controlled based on the minimum single-chip voltage, the average single-chip voltage of the fuel cell stack, the first preset voltage, the second preset voltage and the third preset voltage; wherein the first preset voltage is less than the third preset voltage, and the third preset voltage is less than the second preset voltage.

2. The method according to claim 1, characterized in that The step of controlling the output current of the fuel cell engine according to the minimum single-chip voltage and the first preset voltage includes: Determine a voltage difference between the minimum single-chip voltage and a first preset voltage to obtain a voltage error; wherein the first preset voltage is the minimum operating voltage of the fuel cell; Processing the voltage error by a PID controller to obtain a target current of the fuel cell engine; An output current of the fuel cell engine is controlled according to the target current.

3. The method according to claim 1, characterized in that The controlling the cathode flow of the fuel cell stack according to the minimum single-chip voltage, the average single-chip voltage of the fuel cell stack, the first preset voltage, the second preset voltage, and the third preset voltage includes: determining a first voltage range according to the first preset voltage and a first threshold; determining whether a duration during which the lowest single-chip voltage is within the first voltage range is greater than a first time threshold; If the duration is greater than the first time threshold, the average single-chip voltage is detected and obtained, and the cathode flow of the fuel cell stack is controlled according to the average single-chip voltage, the second preset voltage and the third preset voltage.

4. The method according to claim 3, wherein Controlling the cathode flow of the fuel cell stack by using the average single-chip voltage, the second preset voltage, and the third preset voltage includes: Determining whether the average single-chip voltage is greater than the second preset voltage; If so, reducing the cathode flow rate; If not, determining whether the average single-chip voltage is less than the third preset voltage; If it is less than, query the cathode flow preset chart according to the initial temperature and real-time temperature of the coolant at the fuel cell stack inlet, and control the cathode flow to increase; otherwise, control the cathode flow to remain unchanged.

5. The method according to claim 4, characterized in that The cathode flow preset chart is obtained by performing cold start tests on a fuel cell engine at different low temperatures.

6. The method according to claim 1, characterized in that After controlling the cathode flow of the fuel cell stack according to the minimum single-chip voltage, the average single-chip voltage of the fuel cell stack, the first preset voltage, the second preset voltage, and the third preset voltage, the method further includes: Determine whether to exit cold start based on the real-time temperature of the coolant at the fuel cell stack inlet.

7. The method according to any one of claims 1 to 6, characterized in that The target vehicle is a commercial vehicle.

8. A fuel cell engine cold start device, characterized in that: include: A minimum single-chip voltage acquisition module is used to obtain the minimum single-chip voltage of the fuel cell stack when it is detected that the fuel cell engine of the target vehicle needs to be cold-started based on the ambient temperature of the environment in which the target vehicle is located; an output current control module, configured to control the output current of the fuel cell engine according to the minimum single-chip voltage and a first preset voltage; A cathode flow control module is used to control the cathode flow of the fuel cell stack based on the minimum single-chip voltage, the average single-chip voltage of the fuel cell stack, the first preset voltage, the second preset voltage and the third preset voltage; wherein the first preset voltage is less than the third preset voltage, and the third preset voltage is less than the second preset voltage.

9. A vehicle, characterized in that: The vehicle comprises: 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. The computer program is executed by the at least one processor to enable the at least one processor to perform the fuel cell engine cold start method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the fuel cell engine cold start method according to any one of claims 1 to 7 when executed.

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