Fuel cell system exhaust control method and related device

Abstract

The invention discloses an exhaust control method for a fuel cell system and related equipment, relates to the field of fuel cells, and mainly aims to solve the problem that bubbles are easy to appear after cooling liquid is injected into the fuel cell system. The method comprises the following steps: detecting cooling liquid data when the cooling liquid of the fuel cell system is replaced; under the condition that the cooling liquid data meet preset conditions, basic exhaust operation is executed, and the preset conditions are used for representing that the filling amount of the cooling liquid reaches the standard; under the condition that the basic exhaust operation is completed, fluctuation data of the fuel cell system are detected, and the fluctuation data of the fuel cell system are used for controlling start and stop of the exhaust operation. The method is used for the exhaust control process of the fuel cell system.

Description

Technical Field

[0001] The present invention relates to the field of fuel cells, and in particular to a fuel cell system exhaust control method and related equipment. Background Art

[0002] A hydrogen fuel cell is a device that converts the chemical energy of hydrogen into electrical energy. The only product is water, which generates heat. The voltage of a single fuel cell is only about 1V. In order to meet the power demand of high-voltage equipment, hundreds of fuel cells need to be stacked into a fuel cell stack. In the stack, small flow channels are designed between the single cells so that the coolant can flow through and take away the generated heat. In the fuel cell system, a thermal management subsystem needs to be designed to maintain the optimal operating temperature of the stack and the optimal pressure of the coolant entering the stack. The thermal management subsystem is generally composed of pipelines, water pumps, water tanks, deionizers, and radiators. The water tank is located at the highest position to form pressure in the cooling circuit and replenish coolant in the circuit. After each replacement of the coolant, bubbles are easily formed in the pipelines and small circuits in the stack. If the bubbles are not discharged, the local temperature will be too high and the pressure of the coolant entering the stack will fluctuate, which is extremely unfavorable to the fuel cell. Summary of the invention

[0003] In view of the above problems, the present invention provides a fuel cell system exhaust control method and related equipment, the main purpose of which is to solve the problem of bubbles easily appearing after the fuel cell system is filled with coolant.

[0004] In order to solve at least one of the above technical problems, in a first aspect, the present invention provides a fuel cell system exhaust control method, the method comprising:

[0005] Detecting coolant data when the coolant of the fuel cell system is replaced;

[0006] When the coolant data meets a preset condition, a basic exhaust operation is performed, wherein the preset condition is used to indicate that the coolant filling amount meets the standard;

[0007] When the basic exhaust operation is completed, detecting fluctuation data of the fuel cell system,

[0008] The fluctuation data of the fuel cell system is used to control the start and stop of the exhaust operation.

[0009] Optionally, the above method further includes:

[0010] In a state where the water injection switch is turned on, the exhaust switch is closed, the air subsystem is stopped, the hydrogen subsystem is stopped, and the fuel cell system is stopped, it is determined that the fuel cell system is replacing the coolant.

[0011] Optionally, the coolant data includes a coolant inlet pressure value, and when the coolant data meets a preset condition, performing a basic exhaust operation includes:

[0012] Detect the coolant inlet pressure value based on the temperature and pressure sensor;

[0013] Determining a coolant filling state and a coolant filling amount based on the coolant inlet pressure value;

[0014] When the coolant filling state and the coolant filling amount meet preset conditions, a basic exhaust operation is performed.

[0015] Optionally, when the coolant data meets a preset condition, performing a basic exhaust operation includes:

[0016] When the coolant data meets the preset conditions, determining that the temperature control valve is at a first opening and the water pump is at a first speed;

[0017] The temperature control valve and the water pump are controlled based on the first opening degree and the first speed to perform the basic exhaust operation.

[0018] Optionally, when the basic exhaust operation is completed, detecting fluctuation data of the fuel cell system includes:

[0019] detecting the execution time of the basic exhaust operation;

[0020] When the execution time of the basic exhaust operation meets the first preset time, the basic exhaust operation is completed;

[0021] When the basic exhaust operation is completed, controlling the temperature control valve to decrease from the first opening to a second opening, and then gradually increase from the second opening to a third opening;

[0022] The temperature control valve is controlled to maintain the first speed at each gradient opening for a second preset time.

[0023] Optionally, when the basic exhaust operation is completed, detecting fluctuation data of the fuel cell system includes:

[0024] Under each gradient opening condition, detecting the absolute value of the pressure fluctuation value of the coolant entering and exiting the stack;

[0025] When the absolute value of the inlet and outlet pressure fluctuation value does not satisfy the requirement of being less than a given value for a third preset time, determining a target speed of the water pump based on the inlet and outlet pressure fluctuation value of the coolant;

[0026] The water pump is controlled based on the target rotation speed to continue the exhaust operation.

[0027] Optionally, the above method further includes:

[0028] When the absolute values ​​of the pressure fluctuations in and out of the stack are less than a given value for a third preset time under all gradient openings, it is determined that the exhaust operation is completed;

[0029] When the exhaust operation is completed, detecting the coolant inlet pressure value;

[0030] When the coolant inlet pressure value is less than the base value, a coolant shortage fault is determined.

[0031] In a second aspect, an embodiment of the present invention further provides a fuel cell system exhaust control device, comprising:

[0032] A first detection unit, used to detect coolant data when the coolant of the fuel cell system is replaced;

[0033] An exhaust unit, used for performing a basic exhaust operation when the coolant data meets a preset condition, wherein the preset condition is used to indicate that the coolant filling amount meets the standard;

[0034] The second detection unit is used to detect the fluctuation data of the fuel cell system when the basic exhaust operation is completed, wherein the fluctuation data of the fuel cell system is used to control the start and stop of the exhaust operation.

[0035] In order to achieve the above object, according to the third aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes a stored program, wherein when the above program is executed by a processor, the steps of the above fuel cell system exhaust control method are implemented.

[0036] In order to achieve the above-mentioned purpose, according to the fourth aspect of the present invention, there is provided an electronic device, comprising at least one processor and at least one memory connected to the processor; wherein the above-mentioned processor is used to call the program instructions in the above-mentioned memory to execute the steps of the above-mentioned fuel cell system exhaust control method.

[0037] Through the above technical scheme, the fuel cell system exhaust control method and related equipment provided by the present invention, for the problem of bubbles that are prone to appear after the fuel cell system is filled with coolant, the present invention detects the coolant data when the fuel cell system replaces the coolant; when the coolant data meets the preset conditions, performs the basic exhaust operation, wherein the preset conditions are used to characterize that the coolant filling amount meets the standard; when the basic exhaust operation is completed, detects the fluctuation data of the fuel cell system, wherein the fluctuation data of the fuel cell system is used to control the start and stop of the exhaust operation. The above scheme can automatically discharge bubbles in the pipeline, so that the coolant fills the entire cooling circuit, and automatically judge whether the exhaust is completed, and automatically judge whether the coolant filling amount meets the requirements before and after the exhaust, which can effectively avoid professionals from performing complex exhaust operations and relying on experience to judge whether the exhaust is completed, greatly reducing the workload.

[0038] Correspondingly, the fuel cell system exhaust control device, equipment and computer-readable storage medium provided in the embodiments of the present invention also have the above-mentioned technical effects.

[0039] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0041] Figure 1 A schematic flow chart of a fuel cell system exhaust control method provided by an embodiment of the present invention is shown;

[0042] Figure 2 A schematic diagram of a thermal management architecture of a fuel cell system provided by an embodiment of the present invention is shown;

[0043] Figure 3 A schematic diagram of the overall exhaust process of a fuel cell system provided by an embodiment of the present invention is shown;

[0044] Figure 4 A schematic block diagram showing the composition of a fuel cell system exhaust control device provided by an embodiment of the present invention is shown;

[0045] Figure 5A schematic block diagram of the composition of an exhaust control electronic device for a fuel cell system provided by an embodiment of the present invention is shown;

[0046] Among them, there are exhaust switch 1; signal line 2; fuel cell controller 3; other equipment that needs cooling 4; fuel cell stack 5; water pipe 6; temperature control valve 7; electric heater 8; radiator 9; water pump 10; temperature and pressure sensor 11; water tank exhaust port 12; water tank water inlet 13; water tank 14; exhaust pipe 15. DETAILED DESCRIPTION

[0047] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0048] In order to solve the problem that bubbles are easily generated after the fuel cell system is filled with coolant, an embodiment of the present invention provides a fuel cell system exhaust control method, such as Figure 1 As shown, the method includes:

[0049] S101, detecting coolant data when the coolant of the fuel cell system is replaced;

[0050] Specifically, the coolant data is used to feedback the coolant status of the fuel cell system.

[0051] S102, when the coolant data meets a preset condition, performing a basic exhaust operation, wherein the preset condition is used to indicate that the coolant filling amount meets the standard;

[0052] Further, when the coolant data indicates that the coolant filling amount meets the standard, a basic exhaust operation is performed, and the above-mentioned basic exhaust operation is used to perform an initial exhaust operation on the fuel cell system.

[0053] S103 . When the basic exhaust operation is completed, detecting fluctuation data of the fuel cell system, wherein the fluctuation data of the fuel cell system is used to control the start and stop of the exhaust operation.

[0054] By means of the above technical scheme, the present invention provides a fuel cell system exhaust control method, which detects the coolant data when the fuel cell system replaces the coolant; performs a basic exhaust operation when the coolant data meets the preset conditions, wherein the preset conditions are used to characterize that the coolant filling amount meets the standard; detects the fluctuation data of the fuel cell system when the basic exhaust operation is completed, wherein the fluctuation data of the fuel cell system is used to control the start and stop of the exhaust operation. The above scheme can automatically discharge bubbles in the pipeline, so that the coolant fills the entire cooling circuit, and automatically judge whether the exhaust is completed, and automatically judge whether the coolant filling amount meets the requirements before and after the exhaust, which can effectively avoid professionals from performing complex exhaust operations and relying on experience to judge whether the exhaust is completed, greatly reducing the workload.

[0055] Fuel cell system thermal management architecture Figure 2 As shown in the figure, the heat generated by the fuel cell system during operation needs to be taken away in time, and usually the coolant heat exchange method is adopted, which is mainly composed of temperature and pressure sensors, pipelines, temperature control valves, water pumps, heaters and radiators. The coolant flow rate and the inlet pressure can be controlled by controlling the speed of the water pump. The temperature control valve is equivalent to a controllable three-way valve, which controls the flow of coolant through the electric heater and the radiator. When the opening is 50%, the flow through the two ports is the same. At low temperatures, the coolant can be heated by starting the electric heater, and the heated coolant flows through the stack to assist the stack to quickly increase the temperature, so as to achieve low-temperature rapid start-up. The radiator is mainly composed of a fan and a heat dissipation core, and the fan speed is controlled to cool the coolant. However, after each replacement of the coolant, because the cooling circuit of the fuel cell system is complex and the cooling flow channel in the stack is slender, bubbles are easily formed, and the coolant cannot exchange heat at the bubble, resulting in excessive local temperature, which greatly reduces the battery life.

[0056] like Figure 3 As shown:

[0057] In one embodiment, the method further includes:

[0058] In a state where the water injection switch is turned on, the exhaust switch is closed, the air subsystem is stopped, the hydrogen subsystem is stopped, and the fuel cell system is stopped, it is determined that the fuel cell system is replacing the coolant.

[0059] Exemplarily, the system has low voltage electricity and the equipment performs self-check; when the water injection switch is pressed and the exhaust switch is confirmed to be closed, the air subsystem and hydrogen subsystem are prohibited from operating, and the fuel-electric system is prohibited from starting to avoid affecting the exhaust. When all the above conditions are met, it is determined that the fuel cell system is replacing the coolant, and the following basic exhaust operations are further performed.

[0060] In one embodiment, the coolant data includes a coolant inlet pressure value, and when the coolant data meets a preset condition, performing a basic exhaust operation includes:

[0061] Detect the coolant inlet pressure value based on the temperature and pressure sensor;

[0062] Determining a coolant filling state and a coolant filling amount based on the coolant inlet pressure value;

[0063] When the coolant filling state and the coolant filling amount meet preset conditions, a basic exhaust operation is performed.

[0064] Exemplarily, the FCCU collects the coolant inlet pressure value detected by the temperature and pressure sensor to determine whether to add coolant and whether the amount of coolant added meets the requirements.

[0065] It should be noted that the pressure value is not 0 after adding coolant. When the amount of coolant added meets the requirements, the static pressure value is generally 100kpa.

[0066] In one embodiment, when the coolant data meets a preset condition, performing a basic exhaust operation includes:

[0067] When the coolant data meets the preset conditions, determining that the temperature control valve is at a first opening and the water pump is at a first speed;

[0068] The temperature control valve and the water pump are controlled based on the first opening degree and the first speed to perform the basic exhaust operation.

[0069] Exemplarily, when the amount of coolant added meets the preset conditions, the temperature control valve is controlled to open at 50%. Under the above opening, the flow rates flowing through the electric heater and the radiator are the same, and the bubbles in the two branch pipes can be discharged quickly at the same time. At this time, the flow resistance of the pipe is small, and the bubbles in the battery stack can be quickly taken out. The water pump is controlled to be at a first speed, that is, a basic speed, to perform the basic exhaust operation;

[0070] It should be noted that the above-mentioned preset condition is that the coolant inlet pressure value is greater than 100kPa; the above-mentioned first speed is generally 2500-3000 revolutions per minute. If the speed is too small, the exhaust speed is too slow; if the speed is too fast, the water pressure is too high, which may easily damage the bipolar plates and other devices in the stack. Therefore, the basic speed is generally adjusted according to the maximum coolant inlet pressure.

[0071] In one embodiment, when the basic exhaust operation is completed, detecting the fluctuation data of the fuel cell system includes:

[0072] detecting the execution time of the basic exhaust operation;

[0073] When the execution time of the basic exhaust operation meets the first preset time, the basic exhaust operation is completed;

[0074] When the basic exhaust operation is completed, controlling the temperature control valve to decrease from the first opening to a second opening, and then gradually increase from the second opening to a third opening;

[0075] The temperature control valve is controlled to maintain the first speed at each gradient opening for a second preset time.

[0076] Exemplarily, at the above-mentioned first opening and the first speed, it is determined whether the exhaust time is greater than the first preset time T1. When it is greater than the first preset time, it is determined that the basic exhaust operation is completed, and the opening of the temperature control valve is controlled from 50% to 20%, and then changes gradually to 20%, 40%, 60%, and 80%. At each opening, the first speed is maintained for the second preset time T2 for exhaust, and then the next step is performed.

[0077] It should be noted that the first preset time is generally 5-10 minutes. For different systems, this time is generally observed during the test process, from the start of exhaust to the time when there is no continuous large number of bubbles discharged. If there is no continuous large number of bubbles discharged, continue to exhaust in this state. The second preset time is generally 1-2 minutes, with no special requirements, mainly to discharge bubbles generated by adjusting the opening of the temperature control valve.

[0078] In one embodiment, when the basic exhaust operation is completed, detecting the fluctuation data of the fuel cell system includes:

[0079] Under each gradient opening condition, detecting the absolute value of the pressure fluctuation value of the coolant entering and exiting the stack;

[0080] When the absolute value of the inlet and outlet pressure fluctuation value does not satisfy the requirement of being less than a given value for a third preset time, determining a target speed of the water pump based on the inlet and outlet pressure fluctuation value of the coolant;

[0081] The water pump is controlled based on the target rotation speed to continue the exhaust operation.

[0082] For example, at each gradient opening (20%, 40%, 50%, 60% and 80%), the absolute value of the coolant inlet and outlet pressure fluctuation value |ΔP is determined. in | and |ΔP out |Whether the pressure is continuously less than a given value within time T3 (this value is generally 1 bar. When the gas is exhausted, the pressure will not fluctuate. The purpose of setting 1 bar here is to avoid the error caused by the sensor itself);

[0083] It can be understood that the above-mentioned coolant inlet and outlet pressure fluctuation values ​​are collected by temperature and pressure sensors installed in the inlet and outlet pipelines of the fuel cell stack, and the absolute value of the coolant inlet and outlet pressure fluctuation value is the pressure value collected at that moment minus the average value of the pressure values ​​collected at the previous 5-10 moments, and then the absolute value is taken to determine it.

[0084] The third preset time is an empirical value, generally 5-10 seconds. The given value is generally 1 bar. When the gas is exhausted, the pressure will not fluctuate. Therefore, this application is set to 1 bar to avoid the error caused by the sensor itself.

[0085] Furthermore, when the absolute value of the inlet and outlet pressure fluctuation value does not satisfy the condition that it is less than a given value for a third preset time, the target speed of the water pump is calculated according to the coolant inlet and outlet pressures and their fluctuation values ​​based on the following formula:

[0086] n=n now +k·(|ΔP in |+|ΔP out |) / 2

[0087] Specifically, now is the current speed. When the coolant inlet or outlet pressure reaches the maximum value allowed by the system, k=0, and the target speed n is maintained and no longer increased. If not, k=50, and the water pump speed is increased according to the calculation result. The FCCU controls the water pump speed to the target speed to promote exhaust.

[0088] In one embodiment, the method further includes:

[0089] When the absolute values ​​of the pressure fluctuations in and out of the stack are less than a given value for a third preset time under all gradient openings, it is determined that the exhaust operation is completed;

[0090] When the exhaust operation is completed, detecting the coolant inlet pressure value;

[0091] When the coolant inlet pressure value is less than the base value, a coolant shortage fault is determined.

[0092] Furthermore, if the absolute values ​​of the pressure fluctuations of the inlet and outlet coolant are both less than a given value under all gradient openings, it is determined that the exhaust is completed.

[0093] It should be noted that exhaust is completed at all openings of the temperature control valve. After the water pump is controlled to stop working, if the coolant inlet pressure is greater than the basic value, the exhaust is completed. Otherwise, considering that the pipeline cavity is filled with coolant after exhaust and the coolant level is reduced, a coolant shortage fault is reported.

[0094] Furthermore, as a response to the above Figure 1In order to realize the method shown in the figure, the embodiment of the present invention also provides a fuel cell system exhaust control device for Figure 1 The device embodiment corresponds to the aforementioned method embodiment. For ease of reading, this device embodiment will not repeat the details of the aforementioned method embodiment one by one, but it should be clear that the device in this embodiment can correspond to all the contents of the aforementioned method embodiment. Figure 4 As shown, the device includes: a first detection unit 21, an exhaust unit 22 and a second detection unit 23, wherein

[0095] A first detection unit 21, used to detect coolant data when the coolant of the fuel cell system is replaced;

[0096] The exhaust unit 22 is used to perform a basic exhaust operation when the coolant data meets a preset condition, wherein the preset condition is used to indicate that the coolant filling amount meets the standard;

[0097] The second detection unit 23 is used to detect the fluctuation data of the fuel cell system when the basic exhaust operation is completed, wherein the fluctuation data of the fuel cell system is used to control the start and stop of the exhaust operation.

[0098] The processor includes a kernel, and the kernel retrieves the corresponding program unit from the memory. One or more kernels can be set, and a fuel cell system exhaust control method is implemented by adjusting kernel parameters, which can solve the problem of bubbles easily appearing after the fuel cell system is filled with coolant.

[0099] An embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored program, and when the program is executed by a processor, the fuel cell system exhaust control method is implemented.

[0100] An embodiment of the present invention provides a processor, which is used to run a program, wherein the fuel cell system exhaust control method is executed when the program is running.

[0101] An embodiment of the present invention provides an electronic device, the electronic device comprising at least one processor and at least one memory connected to the processor; wherein the processor is used to call program instructions in the memory to execute the above-mentioned fuel cell system exhaust control method

[0102] An embodiment of the present invention provides an electronic device 30, such as Figure 5As shown, the electronic device includes at least one processor 301, and at least one memory 302 and a bus 303 connected to the processor; wherein the processor 301 and the memory 302 communicate with each other through the bus 303; the processor 301 is used to call the program instructions in the memory to execute the above-mentioned fuel cell system exhaust control method.

[0103] The intelligent electronic devices in this article can be PCs, PADs, mobile phones, etc.

[0104] The present application also provides a computer program product, which, when executed on a process management electronic device, is suitable for executing a program that initializes the steps of the above-mentioned fuel cell system exhaust control method.

[0105] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0106] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0107] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0108] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0109] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0110] The present application also provides a computer program product, which includes computer software instructions. When the computer software instructions are executed on a processing device, the processing device is caused to execute the following Figure 1 This corresponds to the flow of control of the memory in the embodiment.

[0111] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a server or a data center that includes one or more available media integration. The available medium can be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive (SSD)), etc.

[0112] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0113] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0114] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0115] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0116] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0117] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A fuel cell system exhaust control method, characterized in that: include: Detecting coolant data when the coolant of the fuel cell system is replaced; When the coolant data meets a preset condition, a basic exhaust operation is performed, wherein the preset condition is used to indicate that the coolant filling amount meets the standard; When the basic exhaust operation is completed, detecting fluctuation data of the fuel cell system, The fluctuation data of the fuel cell system is used to control the start and stop of the exhaust operation.

2. The method according to claim 1, characterized in that Also includes: In a state where the water injection switch is turned on, the exhaust switch is closed, the air subsystem is stopped, the hydrogen subsystem is stopped, and the fuel cell system is stopped, it is determined that the fuel cell system is replacing the coolant.

3. The method according to claim 1, characterized in that The coolant data includes a coolant inlet pressure value, and when the coolant data meets a preset condition, performing a basic exhaust operation includes: Detect the coolant inlet pressure value based on the temperature and pressure sensor; Determining a coolant filling state and a coolant filling amount based on the coolant inlet pressure value; When the coolant filling state and the coolant filling amount meet preset conditions, a basic exhaust operation is performed.

4. The method according to claim 1, characterized in that When the coolant data meets the preset conditions, performing the basic exhaust operation includes: When the coolant data meets the preset conditions, determining that the temperature control valve is at a first opening and the water pump is at a first speed; The temperature control valve and the water pump are controlled based on the first opening degree and the first speed to perform the basic exhaust operation.

5. The method according to claim 4, characterized in that When the basic exhaust operation is completed, detecting the fluctuation data of the fuel cell system includes: detecting the execution time of the basic exhaust operation; When the execution time of the basic exhaust operation meets the first preset time, the basic exhaust operation is completed; When the basic exhaust operation is completed, controlling the temperature control valve to decrease from the first opening to a second opening, and then gradually increase from the second opening to a third opening; The temperature control valve is controlled to maintain the first speed at each gradient opening for a second preset time.

6. The method according to claim 5, characterized in that When the basic exhaust operation is completed, detecting the fluctuation data of the fuel cell system includes: Under each gradient opening condition, detecting the absolute value of the pressure fluctuation value of the coolant entering and exiting the stack; When the absolute value of the inlet and outlet pressure fluctuation value does not satisfy the requirement of being less than a given value for a third preset time, determining a target speed of the water pump based on the inlet and outlet pressure fluctuation value of the coolant; The water pump is controlled based on the target rotation speed to continue the exhaust operation.

7. The method according to claim 6, characterized in that Also includes: When the absolute values ​​of the pressure fluctuations in and out of the stack are less than a given value for a third preset time under all gradient openings, it is determined that the exhaust operation is completed; When the exhaust operation is completed, detecting the coolant inlet pressure value; When the coolant inlet pressure value is less than the base value, a coolant shortage fault is determined.

8. A fuel cell system exhaust control device, characterized in that: Also includes: A first detection unit, used to detect coolant data when the coolant of the fuel cell system is replaced; An exhaust unit, used for performing a basic exhaust operation when the coolant data meets a preset condition, wherein the preset condition is used to indicate that the coolant filling amount meets the standard; a second detection unit, configured to detect fluctuation data of the fuel cell system when the basic exhaust operation is completed, The fluctuation data of the fuel cell system is used to control the start and stop of the exhaust operation.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed by a processor, the steps of the fuel cell system exhaust gas control method according to any one of claims 1 to 7 are implemented.

10. An electronic device, characterized in that: The electronic device includes at least one processor and at least one memory connected to the processor; wherein the processor is used to call program instructions in the memory to execute the steps of the fuel cell system exhaust control method as described in any one of claims 1 to claim 7.

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