Control method and device of fuel cell system and computer readable storage medium

Abstract

The invention provides a control method and device of a fuel cell system and a computer readable storage medium. The fuel cell system comprises a proton exchange membrane fuel cell, and the method comprises the following steps: obtaining target information, the target information comprising at least one of a cooling liquid level of the proton exchange membrane fuel cell and a cooling liquid temperature difference of an inlet and an outlet of the proton exchange membrane fuel cell; according to the target information, whether preset conditions are met or not is determined, and the preset conditions comprise at least one of the following conditions that the liquid level of cooling liquid is lower than a preset liquid level value and the cooling liquid temperature difference is larger than first preset temperature; under the condition that the preset condition is met, the actual output power of the proton exchange membrane fuel cell is at least controlled to be not larger than preset power, and the preset power is smaller than the rated output power of the proton exchange membrane fuel cell. The fuel cell system at least solves the problem that in the prior art, the internal temperature of a fuel cell system is high, so that a proton exchange membrane fuel cell is abnormal easily.

Description

Technical Field

[0001] The present application relates to the field of fuel cells, and more specifically, to a control method, device, computer-readable storage medium and vehicle for a fuel cell system. Background Art

[0002] Proton exchange membrane fuel cell is a fuel cell that uses the reaction of hydrogen and oxygen to generate electricity, water and heat energy at the same time. The proton exchange membrane is a key component in the proton exchange membrane fuel cell, which allows protons to be transferred from the negative electrode (hydrogen) to the positive electrode (oxygen) while preventing direct contact between hydrogen and oxygen. This membrane is usually made of polymer materials with good proton conductivity and chemical stability.

[0003] Due to its advantages of zero emission, high efficiency, long life, moderate size and operating temperature, proton exchange membrane fuel cells are widely used in automobiles, drones, mobile communication base stations and other fields, and have broad market prospects. The key parts of the membrane electrode of proton exchange membrane fuel cells are sensitive to temperature. Abnormal internal temperature can lead to low system efficiency and life reduction, or even mechanical damage or rupture of the proton exchange membrane. Therefore, fuel cell thermal management is particularly important. Summary of the invention

[0004] The main purpose of the present application is to provide a control method, device, computer-readable storage medium and vehicle for a fuel cell system, so as to at least solve the problem in the prior art that the high internal temperature of the fuel cell system easily causes abnormalities in the proton exchange membrane fuel cell.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a control method for a fuel cell system is provided, wherein the fuel cell system includes a proton exchange membrane fuel cell, and the method includes: acquiring target information, wherein the target information includes at least one of the following: the coolant level of the proton exchange membrane fuel cell, and the coolant temperature difference between the inlet and outlet of the proton exchange membrane fuel cell; determining whether a predetermined condition is met based on the target information, wherein the predetermined condition includes at least one of the following: the coolant level is lower than a predetermined level value, and the coolant temperature difference is greater than a first predetermined temperature; when the predetermined condition is met, at least controlling the actual output power of the proton exchange membrane fuel cell to be not greater than a predetermined power, and the predetermined power is less than the rated output power of the proton exchange membrane fuel cell.

[0006] Optionally, the fuel cell system also includes a circulation pump, which is connected to the inlet or outlet of the proton exchange membrane fuel cell, and is used to transport coolant to at least control the actual output power of the proton exchange membrane fuel cell to be not greater than a predetermined power, including: a first control step, controlling the actual output power to be not greater than a first power; an increase step, increasing the actual speed when the difference between the actual speed of the circulation pump and the predetermined speed is not greater than a first difference threshold; a second control step, controlling the actual output power to be not greater than a second power when the difference is greater than the first difference threshold, the predetermined power including the first power and the second power, the second power being less than the first power.

[0007] Optionally, before increasing the actual speed, the method also includes: determining the operating current of the circulation pump corresponding to the actual speed, and obtaining the theoretical speed corresponding to the operating current, a preset battery life coefficient of the proton exchange membrane fuel cell, and a preset temperature difference correction coefficient of the proton exchange membrane fuel cell; based on the theoretical speed, the battery life coefficient and the temperature difference correction coefficient, calculating the predetermined speed as the product of the theoretical speed, the battery life coefficient and the temperature difference correction coefficient.

[0008] Optionally, after controlling the actual output power to be not greater than the second power, the method further includes: determining whether the difference is greater than a second difference threshold, the second difference threshold being greater than the first difference threshold; when the difference is greater than the second difference threshold, controlling the fuel cell system to shut down; when the difference is not greater than the second difference threshold, executing the increasing step and / or the second controlling step.

[0009] Optionally, before at least controlling the actual output power of the proton exchange membrane fuel cell to be no greater than a predetermined power, the method further includes: determining whether the difference is greater than a third difference threshold, the third difference threshold being greater than the second difference threshold; and controlling the fuel cell system to shut down when the difference is greater than the third difference threshold.

[0010] Optionally, the fuel cell system also includes an expansion water tank, which is connected to the proton exchange membrane fuel cell, and obtains target information, including at least one of the following: obtaining the liquid level in the expansion water tank to obtain the coolant level; obtaining the inlet coolant temperature and the outlet coolant temperature of the proton exchange membrane fuel cell, and calculating the difference between the outlet coolant temperature and the inlet coolant temperature to obtain the coolant temperature difference.

[0011] Optionally, at least controlling the actual output power of the proton exchange membrane fuel cell to be not greater than a predetermined power includes: determining whether the actual output power is greater than the predetermined power; when the actual output power is greater than the predetermined power, adjusting the actual output power so that the adjusted actual output power is not greater than the predetermined power; and when the actual output power is not greater than the predetermined power, controlling the proton exchange membrane fuel cell to operate at the actual output power.

[0012] According to another aspect of the present application, a control device for a fuel cell system is provided, wherein the fuel cell system includes a proton exchange membrane fuel cell, and the device includes: an acquisition unit, used to acquire target information, wherein the target information includes at least one of the following: the coolant level of the proton exchange membrane fuel cell, and the coolant temperature difference between the inlet and outlet of the proton exchange membrane fuel cell; a first determination unit, used to determine whether a predetermined condition is met based on the target information, wherein the predetermined condition includes at least one of the following: the coolant level is lower than a predetermined level value, and the coolant temperature difference is greater than a first predetermined temperature; a first control unit, used to at least control the actual output power of the proton exchange membrane fuel cell to be not greater than a predetermined power when the predetermined condition is met, and the predetermined power is less than the rated output power of the proton exchange membrane fuel cell.

[0013] According to another aspect of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute any one of the methods described.

[0014] According to another aspect of the present application, a vehicle is provided, comprising: a fuel cell system, including a proton exchange membrane fuel cell; an electronic device, including one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include methods for executing any one of the described methods.

[0015] By applying the technical solution of the present application, when the coolant level of the proton exchange membrane fuel cell is low and / or the temperature difference between the inlet and outlet of the coolant is large, the actual output power of the proton exchange membrane fuel cell is limited to make it enter the power limiting mode, thereby avoiding the problem of high heat generation due to high power operation of the proton exchange membrane fuel cell, which causes the internal temperature of the fuel cell system to be high. This solves the impact of the high internal temperature of the fuel cell system on the proton exchange membrane fuel cell, which can not only avoid the fuel cell system from abnormalities or even damage due to high temperature, but also ensure that the fuel cell system outputs a certain power to meet the power supply demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 A hardware structure block diagram of a mobile terminal for executing a control method for a fuel cell system provided in an embodiment of the present application is shown;

[0018] Figure 2 A schematic structural diagram of a fuel cell system provided according to an embodiment of the present application is shown;

[0019] Figure 3 A schematic flow chart of a control method for a fuel cell system provided according to an embodiment of the present application is shown;

[0020] Figure 4 A schematic flow chart of another fuel cell system control method provided according to an embodiment of the present application is shown;

[0021] Figure 5 A schematic flow chart of another fuel cell system control method provided according to an embodiment of the present application is shown;

[0022] Figure 6 A structural block diagram of a control device for a fuel cell system provided according to an embodiment of the present application is shown.

[0023] The drawings include the following reference numerals:

[0024] 102. Processor; 104. Memory; 106. Transmission device; 108. Input and output device; 10. Proton exchange membrane fuel cell; 11. Circulation pump; 12. Expansion water tank; 13. Valve structure; 14. Filter; 15. Radiator / fan. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

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

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising 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] As introduced in the background technology, the high internal temperature of the fuel cell system in the prior art can easily cause abnormalities in the proton exchange membrane fuel cell. To solve the above technical problems, the embodiments of the present application provide a control method, device, computer-readable storage medium and vehicle for a fuel cell system.

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] The method embodiments provided in the embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 FIG. 1 is a hardware structure block diagram of a mobile terminal of a control method for a fuel cell system according to an embodiment of the present invention. Figure 1 As shown, the mobile terminal may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input / output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is for illustration only and does not limit the structure of the mobile terminal. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations shown.

[0031] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the control method of the fuel cell system in the embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, the method described is implemented. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories may be connected to the mobile terminal via a network. Examples of the network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof. The transmission device 106 is used to receive or send data via a network. The specific example of the network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0032] In this embodiment, a control method for a fuel cell system running on a mobile terminal, a computer terminal or a similar computing device is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0033] Figure 2 A schematic diagram of the structure of a fuel cell system is shown as an example. Figure 2 As shown, the fuel cell system includes a proton exchange membrane fuel cell 10, Figure 3 FIG. 1 is a flow chart of a control method for a fuel cell system according to an embodiment of the present application. Figure 3 As shown, the method comprises the following steps:

[0034] Step S201, acquiring target information, wherein the target information includes at least one of the following: a coolant level of the proton exchange membrane fuel cell, and a coolant temperature difference between an inlet and an outlet of the proton exchange membrane fuel cell;

[0035] Specifically, the target information may include the coolant level but not the coolant temperature difference, may include the coolant temperature difference but not the coolant level, or may include both the coolant level and the coolant temperature difference. When the coolant level is low or the coolant temperature difference is large, it indicates that the cooling capacity of the fuel system is reduced and the internal temperature of the fuel cell system is high.

[0036] Step S202, determining whether a predetermined condition is met according to the target information, wherein the predetermined condition includes at least one of the following: the coolant level is lower than a predetermined level value, and the coolant temperature difference is greater than a first predetermined temperature;

[0037] Specifically, when the target information includes the coolant level, the predetermined condition determined includes that the coolant level is lower than a predetermined level value; when the target information includes the coolant temperature difference, the predetermined condition determined includes that the coolant temperature difference is greater than a first predetermined temperature. The predetermined level value and the first predetermined temperature may be set based on empirical values ​​or obtained through multiple experimental verifications, and the present application does not limit their specific values.

[0038] Step S203, when the predetermined condition is met, at least controlling the actual output power of the proton exchange membrane fuel cell to be no greater than a predetermined power, wherein the predetermined power is less than the rated output power of the proton exchange membrane fuel cell.

[0039] Specifically, the predetermined power is a power value preset according to the rated output power. By controlling the actual output power not to be greater than the predetermined power, the proton exchange membrane fuel cell operates in a power-limited mode.

[0040] Through the embodiment, firstly, target information including the coolant level of the proton exchange membrane fuel cell and / or the coolant temperature difference between the inlet and outlet is obtained; then, according to the target information, it is determined whether the coolant level is lower than the predetermined level value and / or whether the coolant temperature difference is greater than the first predetermined temperature; finally, when the coolant level is lower than the predetermined level value and / or the coolant temperature difference is greater than the first predetermined temperature, at least the actual output power of the proton exchange membrane fuel cell is controlled not to be greater than the predetermined power, and the predetermined power is less than the rated output power of the proton exchange membrane fuel cell. In the present application, when the coolant level of the proton exchange membrane fuel cell is low and / or the coolant temperature difference between the inlet and outlet is large, the actual output power of the proton exchange membrane fuel cell is limited to enter the power limiting mode, so as to avoid the problem that the proton exchange membrane fuel cell generates a large amount of heat when running at high power, causing the internal temperature of the fuel cell system to be high, and solve the influence of the high internal temperature of the fuel cell system on the proton exchange membrane fuel cell, which can not only avoid the abnormality or even damage of the fuel cell system due to high temperature, but also ensure that the fuel cell system outputs a certain power to meet the power supply demand.

[0041] Specifically, when the coolant level is lower than the predetermined level value, a low level alarm signal will be triggered, and whether the coolant level is lower than the predetermined level value can be determined based on whether the low level alarm signal is received.

[0042] In one alternative, Figure 2 As shown, the fuel cell system further includes a circulation pump 11, which is connected to the inlet or outlet of the proton exchange membrane fuel cell 10, and is used to transport the coolant. Figure 4 As shown, step S203, at least controlling the actual output power of the proton exchange membrane fuel cell to be not greater than a predetermined power, specifically includes the following steps:

[0043] Step S2031: a first control step, controlling the actual output power to be no greater than a first power;

[0044] Step S2032: increasing step, when the difference between the actual speed of the circulating pump and the predetermined speed is not greater than a first difference threshold, increasing the actual speed;

[0045] Specifically, the predetermined speed is determined according to the theoretical speed of the circulation pump, the life state of the proton exchange membrane fuel cell and the coolant temperature difference between the inlet and outlet. The first difference threshold is set according to the amount of bubbles in the coolant. When the difference between the actual speed and the predetermined speed is not greater than the first difference threshold, it indicates that the amount of bubbles in the coolant is small.

[0046] Step S2033: a second control step, in the case where the difference is greater than the first difference threshold, controlling the actual output power to be not greater than a second power, the predetermined power including the first power and the second power, the second power being less than the first power.

[0047] Specifically, when the difference is greater than the first difference threshold, it indicates that there are more bubbles in the coolant, and the more bubbles there are, the greater the impact on the cooling effect of the coolant.

[0048] In the embodiment, in order to further reduce the internal temperature of the fuel cell system, while limiting the actual output power of the proton exchange membrane fuel cell, the coolant flow in the fuel cell system is increased by increasing the speed of the circulation pump, thereby further reducing the internal temperature of the fuel cell system and further avoiding the influence of high temperature on the proton exchange membrane fuel cell. In addition, the present application monitors the difference between the actual speed of the circulation pump and the predetermined speed. When the difference is large, it indicates that there are more bubbles in the coolant and the cooling capacity of the coolant is poor. At this time, the actual output power of the proton exchange membrane fuel cell is further limited, which can further avoid the problem of high heat generation caused by high power operation of the proton exchange membrane fuel cell, resulting in a high temperature inside the fuel cell system.

[0049] Those skilled in the art can flexibly set specific values ​​of the first power and the second power according to actual conditions. For example, the first power is 60% of the rated output power, and the second power is 30% of the rated output power.

[0050] In order to further ensure that a relatively accurate predetermined speed can be obtained, thereby further realizing precise control of the circulation pump, in some further exemplary embodiments of the present application, before increasing the actual speed, the method further includes: determining the operating current of the circulation pump corresponding to the actual speed, and obtaining the theoretical speed corresponding to the operating current, the preset battery life coefficient of the proton exchange membrane fuel cell, and the preset temperature difference correction coefficient of the proton exchange membrane fuel cell; according to the theoretical speed, the battery life coefficient, and the temperature difference correction coefficient, the predetermined speed is calculated as the product of the theoretical speed, the battery life coefficient, and the temperature difference correction coefficient. In this embodiment, considering the life status of the stack of different proton exchange membrane fuel cells and the temperature difference caused by factors such as the environment and vehicle speed, the battery life coefficient and the temperature difference correction coefficient are used to correct the theoretical speed, and the obtained predetermined speed has strong versatility.

[0051] Specifically, the temperature difference correction coefficient is determined according to the coolant temperature difference between the inlet and outlet of different proton exchange membrane fuel cells.

[0052] In the embodiment, the battery life coefficient takes into account the different life states of the proton exchange membrane fuel cell stacks, which have different efficiencies under the same operating current (generally, the stacks with long operating time have low efficiency and high heat generation due to performance degradation), which in turn leads to a high corresponding water pump speed. Setting the temperature difference correction coefficient T is applicable to the operation of the whole vehicle. The coolant temperature difference at the inlet and outlet of the proton exchange membrane fuel cell may be difficult to control very accurately due to factors such as the environment and vehicle speed. When the control accuracy is poor within a certain period of time, the actual speed of the circulating pump will deviate from the theoretical value to a certain extent. Generally, the water pump speed is lower when the temperature difference is larger.

[0053] Optionally, after controlling the actual output power not to be greater than the second power, the method further includes: determining whether the difference is greater than a second difference threshold, the second difference threshold being greater than the first difference threshold; when the difference is greater than the second difference threshold, controlling the fuel cell system to shut down; when the difference is not greater than the second difference threshold, executing the increasing step and / or the second controlling step. In this embodiment, when the difference is greater than the second difference threshold, it indicates that there are many bubbles in the coolant, at which time the cooling effect of the coolant is poor, the heat dissipation capacity of the fuel cell system is poor, and the risk of damage to the proton exchange membrane is high. At this time, the fuel cell system is controlled to shut down to further reduce the probability of damage to the proton exchange membrane fuel cell. When the difference is not greater than the second difference threshold, it indicates that the current state of the fuel cell system is controllable, and the internal temperature of the fuel cell system is controlled by executing the increasing step and / or the second controlling step to further limit the temperature rise of the fuel cell system.

[0054] Specifically, when the difference is not greater than the second difference threshold and greater than the first difference threshold, the second control step is performed, and when the difference is not greater than the first difference threshold, the increasing step is performed.

[0055] In other embodiments of the present application, before at least controlling the actual output power of the proton exchange membrane fuel cell to be not greater than the predetermined power, the method further includes: determining whether the difference is greater than a third difference threshold, the third difference threshold being greater than the second difference threshold; and when the difference is greater than the third difference threshold, controlling the fuel cell system to shut down. When the difference between the actual speed of the circulating pump and the predetermined speed increases further, it indicates that the system may store a fault. At this time, regardless of whether the coolant level is lower than the predetermined level value, the fuel cell system is directly protected by shutting down.

[0056] In actual application, in some extreme cases, the level sensor for detecting the coolant level may be damaged. At this time, if the coolant level is low again, a maximum limit of the circulation pump deviation (i.e., the third difference threshold) is set. When triggered, a fault is reported and the machine is shut down.

[0057] In addition, the method further includes: when the coolant temperature difference is greater than a second predetermined temperature, controlling the fuel cell system to shut down, the second predetermined temperature being greater than the first predetermined temperature. On this basis, when the predetermined condition is met, at least controlling the actual output power of the proton exchange membrane fuel cell to be not greater than a predetermined power includes: when the coolant level is lower than a predetermined level value, and / or, when the coolant temperature difference is greater than the first predetermined temperature and not greater than the second predetermined temperature, at least controlling the actual output power to be not greater than the predetermined power.

[0058] In order to obtain the coolant level and the coolant temperature difference more simply and quickly, optionally, as Figure 2 As shown, the fuel cell system also includes an expansion water tank 12, which is connected to the proton exchange membrane fuel cell 10 to obtain target information, including at least one of the following: obtaining the liquid level in the expansion water tank to obtain the coolant level; obtaining the inlet coolant temperature and the outlet coolant temperature of the proton exchange membrane fuel cell, and calculating the difference between the outlet coolant temperature and the inlet coolant temperature to obtain the coolant temperature difference.

[0059] like Figure 2 As shown, the fuel cell system also includes a valve structure 13 (specifically, a three-way valve), a filter 14 and a radiator / fan 15. The expansion water tank 12 is also connected to the radiator / fan 15 and the circulation pump 11 respectively; in addition to being connected to the proton exchange membrane fuel cell 10, the circulation pump 11 is also connected to the valve structure 13 and the radiator / fan 15 respectively. The inlet of the proton exchange membrane fuel cell 10 is connected to the filter 14 through the valve structure 13, and the other end of the filter 14 is connected to the radiator / fan 15.

[0060] According to some optional schemes of the present application, at least controlling the actual output power of the proton exchange membrane fuel cell to be not greater than the predetermined power includes: determining whether the actual output power is greater than the predetermined power; when the actual output power is greater than the predetermined power, adjusting the actual output power so that the adjusted actual output power is not greater than the predetermined power; when the actual output power is not greater than the predetermined power, controlling the proton exchange membrane fuel cell to operate at the actual output power. That is to say, when the actual output power is greater than the predetermined power, the actual output power is reduced. By reducing the power, the heat generation of the fuel cell system can be further limited. When the actual output power is not greater than the predetermined power, it means that the actual heat generation of the fuel cell is not large. At this time, its power can be adjusted without adjusting it, so that the fuel cell system can output the required amount of electricity.

[0061] In the actual application process, in order to ensure that the pressure of the cooling path of the fuel cell does not exceed the standard and the hydrogen that leaks abnormally into the coolant can be discharged in time, the pressure cap of the expansion water tank in the fuel cell system is generally set to 30kPa or directly connected to the atmosphere, which causes the coolant to evaporate or steam to be discharged, resulting in a drop in the coolant level; in addition, abnormal leakage at the pipeline seal also occurs from time to time, causing the coolant level to drop. When the coolant level in the expansion water tank is low to a certain level, gas is easily introduced into the water replenishment port, which in turn causes the system's cooling capacity to decrease, and if the gas accumulates in a certain area inside the fuel cell system's stack, this area is very likely to have high temperatures. Through the scheme of the present application, the problem of excessively high local temperatures inside the fuel cell system due to abnormal coolant, causing damage to the proton exchange membrane, can be better solved.

[0062] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the implementation process of the control method of the fuel cell system of the present application will be described in detail below in combination with specific embodiments.

[0063] This embodiment relates to a specific control method of a fuel cell system, such as Figure 5 As shown, the following steps are included:

[0064] Step S1: Determine whether there is a low liquid level alarm, or whether the temperature difference of the coolant at the inlet and outlet of the battery (Tout-Tin) is greater than the first predetermined temperature △T1 and not greater than the second predetermined temperature △T2, if yes, execute step S2;

[0065] Step S2: Control the fuel cell system to enter the first power-limiting mode, and the maximum output power that the system can achieve = 60% PE (PE is the rated output power);

[0066] Step S3: Determine whether the difference between the circulating pump speed under the current current and the predetermined speed (=theoretical speed under the current current*battery life coefficient*temperature difference correction coefficient) is greater than the first difference threshold Rmax2, if yes, execute step S4, otherwise return to step S2;

[0067] Step S4: Control the fuel cell system to enter the second power limiting mode, and the maximum output power that the system can achieve = 30% PE;

[0068] Step S5: Determine whether the difference between the circulating pump speed under the current current and the predetermined speed is greater than the second difference threshold Rmax3, if yes, execute step S8, otherwise return to step S4;

[0069] Step S6: Determine whether the temperature difference of the coolant at the inlet and outlet of the battery is greater than the second predetermined temperature ΔT2, if yes, execute step S8;

[0070] Step S7: Determine whether the difference between the rotation speed of the circulation pump under the current current and the predetermined rotation speed is greater than the third difference threshold Rmax1, if yes, execute step S8, wherein Rmax1>Rmax3>Rmax2;

[0071] Step S8: Determine that the fuel cell system is faulty and shut down the system.

[0072] The control method of the present application can enter a power-limited operation mode when the coolant level is abnormal to prevent abnormal damage to the battery stack, while outputting a certain power to ensure certain driving needs; when the coolant continues to crack abnormally, the system is shut down to protect it.

[0073] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0074] The embodiment of the present application also provides a control device for a fuel cell system. It should be noted that the control device for the fuel cell system of the embodiment of the present application can be used to execute the control method for the fuel cell system provided in the embodiment of the present application. The device is used to implement the embodiments and preferred embodiments, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware for a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived.

[0075] The following is an introduction to the control device of the fuel cell system provided in the embodiments of the present application.

[0076] Figure 2A schematic diagram of the structure of a fuel cell system is shown as an example. Figure 2 As shown, the fuel cell system includes a proton exchange membrane fuel cell 10, Figure 6 Schematic diagram of a control device for a fuel cell system according to an embodiment of the present application. Figure 6 As shown, the device comprises:

[0077] An acquisition unit 20 is used to acquire target information, wherein the target information includes at least one of the following: a coolant level of the proton exchange membrane fuel cell, and a coolant temperature difference between an inlet and an outlet of the proton exchange membrane fuel cell;

[0078] Specifically, the target information may include the coolant level but not the coolant temperature difference, may include the coolant temperature difference but not the coolant level, or may include both the coolant level and the coolant temperature difference. When the coolant level is low or the coolant temperature difference is large, it indicates that the cooling capacity of the fuel system is reduced and the internal temperature of the fuel cell system is high.

[0079] A first determination unit 21 is used to determine whether a predetermined condition is met according to the target information, wherein the predetermined condition includes at least one of the following: the coolant level is lower than a predetermined level value, and the coolant temperature difference is greater than a first predetermined temperature;

[0080] Specifically, when the target information includes the coolant level, the predetermined condition determined includes that the coolant level is lower than a predetermined level value; when the target information includes the coolant temperature difference, the predetermined condition determined includes that the coolant temperature difference is greater than a first predetermined temperature. The predetermined level value and the first predetermined temperature may be set based on empirical values ​​or obtained through multiple experimental verifications, and the present application does not limit their specific values.

[0081] The first control unit 22 is used to at least control the actual output power of the proton exchange membrane fuel cell to be no greater than a predetermined power when the predetermined condition is met, and the predetermined power is less than the rated output power of the proton exchange membrane fuel cell.

[0082] Specifically, the predetermined power is a power value preset according to the rated output power. By controlling the actual output power not to be greater than the predetermined power, the proton exchange membrane fuel cell operates in a power-limited mode.

[0083] Through the embodiment, the acquisition unit acquires target information including the coolant level of the proton exchange membrane fuel cell and / or the coolant temperature difference between the inlet and outlet; the first determination unit determines whether the coolant level is lower than the predetermined level value and / or whether the coolant temperature difference is greater than the first predetermined temperature according to the target information; the first control unit at least controls the actual output power of the proton exchange membrane fuel cell to be not greater than the predetermined power when the coolant level is lower than the predetermined level value and / or the coolant temperature difference is greater than the first predetermined temperature, and the predetermined power is less than the rated output power of the proton exchange membrane fuel cell. In the present application, when the coolant level of the proton exchange membrane fuel cell is low and / or the coolant temperature difference between the inlet and outlet is large, the actual output power of the proton exchange membrane fuel cell is limited to enter the power limiting mode, so as to avoid the problem that the proton exchange membrane fuel cell generates a large amount of heat when running at high power, causing the internal temperature of the fuel cell system to be high, and solves the influence of the high internal temperature of the fuel cell system on the proton exchange membrane fuel cell, which can not only avoid the abnormality or even damage of the fuel cell system due to high temperature, but also ensure that the fuel cell system outputs a certain power to meet the power supply demand.

[0084] Specifically, when the coolant level is lower than the predetermined level value, a low level alarm signal will be triggered, and whether the coolant level is lower than the predetermined level value can be determined based on whether the low level alarm signal is received.

[0085] In one alternative, Figure 2 As shown, the fuel cell system further includes a circulation pump 11, which is connected to the inlet or outlet of the proton exchange membrane fuel cell 10, and is used to transport coolant. The first control unit specifically includes:

[0086] A first control module, used in a first control step, to control the actual output power to be not greater than a first power;

[0087] an increasing module, used for the increasing step, in which, when the difference between the actual rotating speed of the circulating pump and the predetermined rotating speed is not greater than a first difference threshold, the actual rotating speed is increased;

[0088] Specifically, the predetermined speed is determined according to the theoretical speed of the circulation pump, the life state of the proton exchange membrane fuel cell and the coolant temperature difference between the inlet and outlet. The first difference threshold is set according to the amount of bubbles in the coolant. When the difference between the actual speed and the predetermined speed is not greater than the first difference threshold, it indicates that the amount of bubbles in the coolant is small.

[0089] The second control module is used for the second control step. When the difference is greater than the first difference threshold, the actual output power is controlled to be not greater than a second power. The predetermined power includes the first power and the second power, and the second power is less than the first power.

[0090] Specifically, when the difference is greater than the first difference threshold, it indicates that there are more bubbles in the coolant, and the more bubbles there are, the greater the impact on the cooling effect of the coolant.

[0091] In the embodiment, in order to further reduce the internal temperature of the fuel cell system, while limiting the actual output power of the proton exchange membrane fuel cell, the coolant flow in the fuel cell system is increased by increasing the speed of the circulation pump, thereby further reducing the internal temperature of the fuel cell system and further avoiding the influence of high temperature on the proton exchange membrane fuel cell. In addition, the present application monitors the difference between the actual speed of the circulation pump and the predetermined speed. When the difference is large, it indicates that there are more bubbles in the coolant and the cooling capacity of the coolant is poor. At this time, the actual output power of the proton exchange membrane fuel cell is further limited, which can further avoid the problem of high heat generation caused by high power operation of the proton exchange membrane fuel cell, resulting in a high temperature inside the fuel cell system.

[0092] Those skilled in the art can flexibly set specific values ​​of the first power and the second power according to actual conditions. For example, the first power is 60% of the rated output power, and the second power is 30% of the rated output power.

[0093] In order to further ensure that a relatively accurate predetermined speed can be obtained, thereby further realizing precise control of the circulation pump, in some further exemplary embodiments of the present application, the device further includes: a second determination unit, which is used to determine the operating current of the circulation pump corresponding to the actual speed before increasing the actual speed, and obtain the theoretical speed corresponding to the operating current, the preset battery life coefficient of the proton exchange membrane fuel cell, and the preset temperature difference correction coefficient of the proton exchange membrane fuel cell; a calculation unit, which is used to calculate the predetermined speed as the product of the theoretical speed, the battery life coefficient and the temperature difference correction coefficient according to the theoretical speed, the battery life coefficient and the temperature difference correction coefficient. In this embodiment, considering the life status of the stack of different proton exchange membrane fuel cells and the temperature difference caused by factors such as the environment and vehicle speed, the battery life coefficient and the temperature difference correction coefficient are used to correct the theoretical speed, and the obtained predetermined speed has strong versatility.

[0094] Specifically, the temperature difference correction coefficient is determined according to the coolant temperature difference between the inlet and outlet of different proton exchange membrane fuel cells.

[0095] In the embodiment, the battery life coefficient takes into account the different life states of the proton exchange membrane fuel cell stacks, which have different efficiencies under the same operating current (generally, the stacks with long operating time have low efficiency and high heat generation due to performance degradation), which in turn leads to a high corresponding water pump speed. Setting the temperature difference correction coefficient T is applicable to the operation of the whole vehicle. The coolant temperature difference at the inlet and outlet of the proton exchange membrane fuel cell may be difficult to control very accurately due to factors such as the environment and vehicle speed. When the control accuracy is poor within a certain period of time, the actual speed of the circulating pump will deviate from the theoretical value to a certain extent. Generally, the water pump speed is lower when the temperature difference is larger.

[0096] Optionally, the device further includes: a third determination unit, which is used to determine whether the difference is greater than a second difference threshold after controlling the actual output power to be not greater than the second power, and the second difference threshold is greater than the first difference threshold; a second control unit, which is used to control the fuel cell system to shut down when the difference is greater than the second difference threshold; and an execution unit, which is used to execute the increase step and / or the second control step when the difference is not greater than the second difference threshold. In this embodiment, when the difference is greater than the second difference threshold, it means that there are many bubbles in the coolant, and the cooling effect of the coolant is poor at this time, the heat dissipation capacity of the fuel cell system is poor, and the risk of damage to the proton exchange membrane is high. At this time, the fuel cell system is controlled to shut down to further reduce the probability of damage to the proton exchange membrane fuel cell. When the difference is not greater than the second difference threshold, it means that the current state of the fuel cell system is controllable, and the internal temperature of the fuel cell system is controlled by executing the increase step and / or the second control step to further limit the temperature rise of the fuel cell system.

[0097] Specifically, when the difference is not greater than the second difference threshold and greater than the first difference threshold, the second control step is performed, and when the difference is not greater than the first difference threshold, the increasing step is performed.

[0098] In other embodiments of the present application, the device further includes: a fourth determination unit, used to determine whether the difference is greater than a third difference threshold before at least controlling the actual output power of the proton exchange membrane fuel cell to be not greater than a predetermined power, and the third difference threshold is greater than the second difference threshold; a third control unit, used to control the fuel cell system to shut down when the difference is greater than the third difference threshold. When the difference between the actual speed of the circulating pump and the predetermined speed increases further, it indicates that the system may store a fault. At this time, regardless of whether the coolant level is lower than the predetermined level value, the fuel cell system is directly protected by shutting down.

[0099] In actual application, in some extreme cases, the level sensor for detecting the coolant level may be damaged. At this time, if the coolant level is low again, a maximum limit of the circulation pump deviation (i.e., the third difference threshold) is set. When triggered, a fault is reported and the machine is shut down.

[0100] In addition, the device further includes: a fourth control unit, which is used to control the fuel cell system to shut down when the coolant temperature difference is greater than a second predetermined temperature, and the second predetermined temperature is greater than the first predetermined temperature. On this basis, the first control unit includes: a third control module, which is used to at least control the actual output power to be not greater than the predetermined power when the coolant level is lower than a predetermined level value, and / or when the coolant temperature difference is greater than the first predetermined temperature and not greater than the second predetermined temperature.

[0101] In order to obtain the coolant level and the coolant temperature difference more simply and quickly, optionally, as Figure 2 As shown, the fuel cell system also includes an expansion water tank 12, which is connected to the proton exchange membrane fuel cell 10, and the acquisition unit includes at least one of the following: a first acquisition module, used to acquire the liquid level in the expansion water tank to obtain the coolant level; a second acquisition module, used to acquire the inlet coolant temperature and the outlet coolant temperature of the proton exchange membrane fuel cell, and calculate the difference between the outlet coolant temperature and the inlet coolant temperature to obtain the coolant temperature difference.

[0102] like Figure 2 As shown, the fuel cell system also includes a valve structure 13, a filter 14 and a radiator / fan 15. The expansion water tank 12 is also connected to the radiator / fan 15 and the circulation pump 11 respectively; in addition to being connected to the proton exchange membrane fuel cell 10, the circulation pump 11 is also connected to the valve structure 13 and the radiator / fan 15 respectively. The inlet of the proton exchange membrane fuel cell 10 is connected to the filter 14 through the valve structure 13, and the other end of the filter 14 is connected to the radiator / fan 15.

[0103] According to some optional schemes of the present application, the first control unit includes: a determination module for determining whether the actual output power is greater than the predetermined power; an adjustment module for adjusting the actual output power when the actual output power is greater than the predetermined power, so that the adjusted actual output power is not greater than the predetermined power; and a fourth control module for controlling the proton exchange membrane fuel cell to operate at the actual output power when the actual output power is not greater than the predetermined power. That is to say, when the actual output power is greater than the predetermined power, the actual output power is reduced. By reducing the power, the heat generation of the fuel cell system can be further limited. When the actual output power is not greater than the predetermined power, it means that the actual heat generation of the fuel cell is not large. At this time, its power can be adjusted without adjustment, so that the fuel cell system can output the required amount of electricity.

[0104] In the actual application process, in order to ensure that the pressure of the cooling path of the fuel cell does not exceed the standard and the hydrogen that leaks abnormally into the coolant can be discharged in time, the pressure cap of the expansion water tank in the fuel cell system is generally set to 30kPa or directly connected to the atmosphere, which causes the coolant to evaporate or steam to be discharged, resulting in a drop in the coolant level; in addition, abnormal leakage at the pipeline seal also occurs from time to time, causing the coolant level to drop. When the coolant level in the expansion water tank is low to a certain level, gas is easily introduced into the water replenishment port, which in turn causes the system's cooling capacity to decrease, and if the gas accumulates in a certain area inside the fuel cell system's stack, this area is very likely to have high temperatures. Through the scheme of the present application, the problem of excessively high local temperatures inside the fuel cell system due to abnormal coolant, causing damage to the proton exchange membrane, can be better solved.

[0105] The control device of the fuel cell system includes a processor and a memory, and the acquisition unit, the first determination unit, the first control unit, etc. are all stored in the memory as program units, and the processor executes the program units stored in the memory to implement corresponding functions. The modules are all located in the same processor; or, the modules are located in different processors in any combination.

[0106] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be provided, and the problem of the proton exchange membrane fuel cell abnormality caused by the high internal temperature of the fuel cell system in the prior art can be solved by adjusting the kernel parameters.

[0107] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0108] An embodiment of the present application also provides a vehicle, comprising: a fuel cell system, including a proton exchange membrane fuel cell; an electronic device, including one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include methods for executing any one of the described methods.

[0109] Through the embodiments, the electronic equipment in the vehicle adopts any one of the described methods to control the fuel cell system. When the coolant level of the proton exchange membrane fuel cell is low and / or the temperature difference of the coolant at the inlet and outlet is large, the method limits the actual output power of the proton exchange membrane fuel cell to make it enter the power limiting mode, thereby avoiding the problem of high heat generation due to high power operation of the proton exchange membrane fuel cell, which causes the internal temperature of the fuel cell system to be high. The influence of the high internal temperature of the fuel cell system on the proton exchange membrane fuel cell is solved, which can not only avoid the fuel cell system from being abnormal or even damaged due to high temperature, but also ensure that the fuel cell system outputs a certain power to meet the power supply demand, thereby ensuring a high service life of the fuel cell system.

[0110] An embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the control method of the fuel cell system.

[0111] Specifically, the control method of the fuel cell system includes:

[0112] Step S201, acquiring target information, wherein the target information includes at least one of the following: a coolant level of the proton exchange membrane fuel cell, and a coolant temperature difference between an inlet and an outlet of the proton exchange membrane fuel cell;

[0113] Specifically, the target information may include the coolant level but not the coolant temperature difference, may include the coolant temperature difference but not the coolant level, or may include both the coolant level and the coolant temperature difference. When the coolant level is low or the coolant temperature difference is large, it indicates that the cooling capacity of the fuel system is reduced and the internal temperature of the fuel cell system is high.

[0114] Step S202, determining whether a predetermined condition is met according to the target information, wherein the predetermined condition includes at least one of the following: the coolant level is lower than a predetermined level value, and the coolant temperature difference is greater than a first predetermined temperature;

[0115] Specifically, when the target information includes the coolant level, the predetermined condition determined includes that the coolant level is lower than a predetermined level value; when the target information includes the coolant temperature difference, the predetermined condition determined includes that the coolant temperature difference is greater than a first predetermined temperature. The predetermined level value and the first predetermined temperature may be set based on empirical values ​​or obtained through multiple experimental verifications, and the present application does not limit their specific values.

[0116] Step S203, when the predetermined condition is met, at least controlling the actual output power of the proton exchange membrane fuel cell to be no greater than a predetermined power, wherein the predetermined power is less than the rated output power of the proton exchange membrane fuel cell.

[0117] Specifically, the predetermined power is a power value preset according to the rated output power. By controlling the actual output power not to be greater than the predetermined power, the proton exchange membrane fuel cell operates in a power-limited mode.

[0118] Optionally, the fuel cell system also includes a circulation pump, which is connected to the inlet or outlet of the proton exchange membrane fuel cell, and is used to transport coolant to at least control the actual output power of the proton exchange membrane fuel cell to be not greater than a predetermined power, including: a first control step, controlling the actual output power to be not greater than a first power; an increase step, increasing the actual speed when the difference between the actual speed of the circulation pump and the predetermined speed is not greater than a first difference threshold; a second control step, controlling the actual output power to be not greater than a second power when the difference is greater than the first difference threshold, the predetermined power including the first power and the second power, the second power being less than the first power.

[0119] Optionally, before increasing the actual speed, the method also includes: determining the operating current of the circulation pump corresponding to the actual speed, and obtaining the theoretical speed corresponding to the operating current, a preset battery life coefficient of the proton exchange membrane fuel cell, and a preset temperature difference correction coefficient of the proton exchange membrane fuel cell; based on the theoretical speed, the battery life coefficient and the temperature difference correction coefficient, calculating the predetermined speed as the product of the theoretical speed, the battery life coefficient and the temperature difference correction coefficient.

[0120] Optionally, after controlling the actual output power to be not greater than the second power, the method further includes: determining whether the difference is greater than a second difference threshold, the second difference threshold being greater than the first difference threshold; when the difference is greater than the second difference threshold, controlling the fuel cell system to shut down; when the difference is not greater than the second difference threshold, executing the increasing step and / or the second controlling step.

[0121] Optionally, before at least controlling the actual output power of the proton exchange membrane fuel cell to be no greater than a predetermined power, the method further includes: determining whether the difference is greater than a third difference threshold, the third difference threshold being greater than the second difference threshold; and controlling the fuel cell system to shut down when the difference is greater than the third difference threshold.

[0122] Optionally, the fuel cell system also includes an expansion water tank, which is connected to the proton exchange membrane fuel cell, and obtains target information, including at least one of the following: obtaining the liquid level in the expansion water tank to obtain the coolant level; obtaining the inlet coolant temperature and the outlet coolant temperature of the proton exchange membrane fuel cell, and calculating the difference between the outlet coolant temperature and the inlet coolant temperature to obtain the coolant temperature difference.

[0123] Optionally, at least controlling the actual output power of the proton exchange membrane fuel cell to be not greater than a predetermined power includes: determining whether the actual output power is greater than the predetermined power; when the actual output power is greater than the predetermined power, adjusting the actual output power so that the adjusted actual output power is not greater than the predetermined power; and when the actual output power is not greater than the predetermined power, controlling the proton exchange membrane fuel cell to operate at the actual output power.

[0124] An embodiment of the present invention provides a processor, which is used to run a program, wherein the control method of the fuel cell system is executed when the program is run.

[0125] Specifically, the control method of the fuel cell system includes:

[0126] Step S201, acquiring target information, wherein the target information includes at least one of the following: a coolant level of the proton exchange membrane fuel cell, and a coolant temperature difference between an inlet and an outlet of the proton exchange membrane fuel cell;

[0127] Specifically, the target information may include the coolant level but not the coolant temperature difference, may include the coolant temperature difference but not the coolant level, or may include both the coolant level and the coolant temperature difference. When the coolant level is low or the coolant temperature difference is large, it indicates that the cooling capacity of the fuel system is reduced and the internal temperature of the fuel cell system is high.

[0128] Step S202, determining whether a predetermined condition is met according to the target information, wherein the predetermined condition includes at least one of the following: the coolant level is lower than a predetermined level value, and the coolant temperature difference is greater than a first predetermined temperature;

[0129] Specifically, when the target information includes the coolant level, the predetermined condition determined includes that the coolant level is lower than a predetermined level value; when the target information includes the coolant temperature difference, the predetermined condition determined includes that the coolant temperature difference is greater than a first predetermined temperature. The predetermined level value and the first predetermined temperature may be set based on empirical values ​​or obtained through multiple experimental verifications, and the present application does not limit their specific values.

[0130] Step S203, when the predetermined condition is met, at least controlling the actual output power of the proton exchange membrane fuel cell to be no greater than a predetermined power, wherein the predetermined power is less than the rated output power of the proton exchange membrane fuel cell.

[0131] Specifically, the predetermined power is a power value preset according to the rated output power. By controlling the actual output power not to be greater than the predetermined power, the proton exchange membrane fuel cell operates in a power-limited mode.

[0132] Optionally, the fuel cell system also includes a circulation pump, which is connected to the inlet or outlet of the proton exchange membrane fuel cell, and is used to transport coolant to at least control the actual output power of the proton exchange membrane fuel cell to be not greater than a predetermined power, including: a first control step, controlling the actual output power to be not greater than a first power; an increase step, increasing the actual speed when the difference between the actual speed of the circulation pump and the predetermined speed is not greater than a first difference threshold; a second control step, controlling the actual output power to be not greater than a second power when the difference is greater than the first difference threshold, the predetermined power including the first power and the second power, the second power being less than the first power.

[0133] Optionally, before increasing the actual speed, the method also includes: determining the operating current of the circulation pump corresponding to the actual speed, and obtaining the theoretical speed corresponding to the operating current, a preset battery life coefficient of the proton exchange membrane fuel cell, and a preset temperature difference correction coefficient of the proton exchange membrane fuel cell; based on the theoretical speed, the battery life coefficient and the temperature difference correction coefficient, calculating the predetermined speed as the product of the theoretical speed, the battery life coefficient and the temperature difference correction coefficient.

[0134] Optionally, after controlling the actual output power to be not greater than the second power, the method further includes: determining whether the difference is greater than a second difference threshold, the second difference threshold being greater than the first difference threshold; when the difference is greater than the second difference threshold, controlling the fuel cell system to shut down; when the difference is not greater than the second difference threshold, executing the increasing step and / or the second controlling step.

[0135] Optionally, before at least controlling the actual output power of the proton exchange membrane fuel cell to be no greater than a predetermined power, the method further includes: determining whether the difference is greater than a third difference threshold, the third difference threshold being greater than the second difference threshold; and controlling the fuel cell system to shut down when the difference is greater than the third difference threshold.

[0136] Optionally, the fuel cell system also includes an expansion water tank, which is connected to the proton exchange membrane fuel cell, and obtains target information, including at least one of the following: obtaining the liquid level in the expansion water tank to obtain the coolant level; obtaining the inlet coolant temperature and the outlet coolant temperature of the proton exchange membrane fuel cell, and calculating the difference between the outlet coolant temperature and the inlet coolant temperature to obtain the coolant temperature difference.

[0137] Optionally, at least controlling the actual output power of the proton exchange membrane fuel cell to be not greater than a predetermined power includes: determining whether the actual output power is greater than the predetermined power; when the actual output power is greater than the predetermined power, adjusting the actual output power so that the adjusted actual output power is not greater than the predetermined power; and when the actual output power is not greater than the predetermined power, controlling the proton exchange membrane fuel cell to operate at the actual output power.

[0138] An embodiment of the present invention provides a device, the device including a processor, a memory, and a program stored in the memory and executable on the processor, and when the processor executes the program, at least the following steps are implemented:

[0139] Step S201, acquiring target information, wherein the target information includes at least one of the following: a coolant level of the proton exchange membrane fuel cell, and a coolant temperature difference between an inlet and an outlet of the proton exchange membrane fuel cell;

[0140] Step S202, determining whether a predetermined condition is met according to the target information, wherein the predetermined condition includes at least one of the following: the coolant level is lower than a predetermined level value, and the coolant temperature difference is greater than a first predetermined temperature;

[0141] Step S203, when the predetermined condition is met, at least controlling the actual output power of the proton exchange membrane fuel cell to be no greater than a predetermined power, wherein the predetermined power is less than the rated output power of the proton exchange membrane fuel cell.

[0142] The devices in this article can be servers, PCs, PADs, mobile phones, etc.

[0143] Optionally, the fuel cell system also includes a circulation pump, which is connected to the inlet or outlet of the proton exchange membrane fuel cell, and is used to transport coolant to at least control the actual output power of the proton exchange membrane fuel cell to be not greater than a predetermined power, including: a first control step, controlling the actual output power to be not greater than a first power; an increase step, increasing the actual speed when the difference between the actual speed of the circulation pump and the predetermined speed is not greater than a first difference threshold; a second control step, controlling the actual output power to be not greater than a second power when the difference is greater than the first difference threshold, the predetermined power including the first power and the second power, the second power being less than the first power.

[0144] Optionally, before increasing the actual speed, the method also includes: determining the operating current of the circulation pump corresponding to the actual speed, and obtaining the theoretical speed corresponding to the operating current, a preset battery life coefficient of the proton exchange membrane fuel cell, and a preset temperature difference correction coefficient of the proton exchange membrane fuel cell; based on the theoretical speed, the battery life coefficient and the temperature difference correction coefficient, calculating the predetermined speed as the product of the theoretical speed, the battery life coefficient and the temperature difference correction coefficient.

[0145] Optionally, after controlling the actual output power to be not greater than the second power, the method further includes: determining whether the difference is greater than a second difference threshold, the second difference threshold being greater than the first difference threshold; when the difference is greater than the second difference threshold, controlling the fuel cell system to shut down; when the difference is not greater than the second difference threshold, executing the increasing step and / or the second controlling step.

[0146] Optionally, before at least controlling the actual output power of the proton exchange membrane fuel cell to be no greater than a predetermined power, the method further includes: determining whether the difference is greater than a third difference threshold, the third difference threshold being greater than the second difference threshold; and controlling the fuel cell system to shut down when the difference is greater than the third difference threshold.

[0147] Optionally, the fuel cell system also includes an expansion water tank, which is connected to the proton exchange membrane fuel cell, and obtains target information, including at least one of the following: obtaining the liquid level in the expansion water tank to obtain the coolant level; obtaining the inlet coolant temperature and the outlet coolant temperature of the proton exchange membrane fuel cell, and calculating the difference between the outlet coolant temperature and the inlet coolant temperature to obtain the coolant temperature difference.

[0148] Optionally, at least controlling the actual output power of the proton exchange membrane fuel cell to be not greater than a predetermined power includes: determining whether the actual output power is greater than the predetermined power; when the actual output power is greater than the predetermined power, adjusting the actual output power so that the adjusted actual output power is not greater than the predetermined power; and when the actual output power is not greater than the predetermined power, controlling the proton exchange membrane fuel cell to operate at the actual output power.

[0149] The present application also provides a computer program product, including computer instructions, which, when executed by a processor, implement at least the following method steps:

[0150] Step S201, acquiring target information, wherein the target information includes at least one of the following: a coolant level of the proton exchange membrane fuel cell, and a coolant temperature difference between an inlet and an outlet of the proton exchange membrane fuel cell;

[0151] Step S202, determining whether a predetermined condition is met according to the target information, wherein the predetermined condition includes at least one of the following: the coolant level is lower than a predetermined level value, and the coolant temperature difference is greater than a first predetermined temperature;

[0152] Step S203, when the predetermined condition is met, at least controlling the actual output power of the proton exchange membrane fuel cell to be no greater than a predetermined power, wherein the predetermined power is less than the rated output power of the proton exchange membrane fuel cell.

[0153] Optionally, the fuel cell system also includes a circulation pump, which is connected to the inlet or outlet of the proton exchange membrane fuel cell, and is used to transport coolant to at least control the actual output power of the proton exchange membrane fuel cell to be not greater than a predetermined power, including: a first control step, controlling the actual output power to be not greater than a first power; an increase step, increasing the actual speed when the difference between the actual speed of the circulation pump and the predetermined speed is not greater than a first difference threshold; a second control step, controlling the actual output power to be not greater than a second power when the difference is greater than the first difference threshold, the predetermined power including the first power and the second power, the second power being less than the first power.

[0154] Optionally, before increasing the actual speed, the method also includes: determining the operating current of the circulation pump corresponding to the actual speed, and obtaining the theoretical speed corresponding to the operating current, a preset battery life coefficient of the proton exchange membrane fuel cell, and a preset temperature difference correction coefficient of the proton exchange membrane fuel cell; based on the theoretical speed, the battery life coefficient and the temperature difference correction coefficient, calculating the predetermined speed as the product of the theoretical speed, the battery life coefficient and the temperature difference correction coefficient.

[0155] Optionally, after controlling the actual output power to be not greater than the second power, the method further includes: determining whether the difference is greater than a second difference threshold, the second difference threshold being greater than the first difference threshold; when the difference is greater than the second difference threshold, controlling the fuel cell system to shut down; when the difference is not greater than the second difference threshold, executing the increasing step and / or the second controlling step.

[0156] Optionally, before at least controlling the actual output power of the proton exchange membrane fuel cell to be no greater than a predetermined power, the method further includes: determining whether the difference is greater than a third difference threshold, the third difference threshold being greater than the second difference threshold; and controlling the fuel cell system to shut down when the difference is greater than the third difference threshold.

[0157] Optionally, the fuel cell system also includes an expansion water tank, which is connected to the proton exchange membrane fuel cell, and obtains target information, including at least one of the following: obtaining the liquid level in the expansion water tank to obtain the coolant level; obtaining the inlet coolant temperature and the outlet coolant temperature of the proton exchange membrane fuel cell, and calculating the difference between the outlet coolant temperature and the inlet coolant temperature to obtain the coolant temperature difference.

[0158] Optionally, at least controlling the actual output power of the proton exchange membrane fuel cell to be not greater than a predetermined power includes: determining whether the actual output power is greater than the predetermined power; when the actual output power is greater than the predetermined power, adjusting the actual output power so that the adjusted actual output power is not greater than the predetermined power; and when the actual output power is not greater than the predetermined power, controlling the proton exchange membrane fuel cell to operate at the actual output power.

[0159] Obviously, those skilled in the art should understand that the modules or steps of the present invention described above can be implemented by a general-purpose computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order than herein, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0160] 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.

[0161] 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 processor, 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.

[0162] 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 including 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.

[0163] 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.

[0164] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0165] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0166] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0167] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0168] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A control method for a fuel cell system, characterized in that: The fuel cell system includes a proton exchange membrane fuel cell, and the method includes: Acquiring target information, the target information comprising at least one of the following: a coolant level of the proton exchange membrane fuel cell, a coolant temperature difference between an inlet and an outlet of the proton exchange membrane fuel cell; Determining whether a predetermined condition is met according to the target information, the predetermined condition comprising at least one of the following: the coolant level is lower than a predetermined level value, the coolant temperature difference is greater than a first predetermined temperature; When the predetermined condition is met, at least the actual output power of the proton exchange membrane fuel cell is controlled to be no greater than a predetermined power, and the predetermined power is less than the rated output power of the proton exchange membrane fuel cell.

2. The method according to claim 1, characterized in that The fuel cell system further includes a circulation pump, which is connected to an inlet or an outlet of the proton exchange membrane fuel cell, and is used to transport a coolant, and at least controls the actual output power of the proton exchange membrane fuel cell to be not greater than a predetermined power, including: A first control step, controlling the actual output power to be not greater than a first power; an increasing step, in which, when the difference between the actual rotation speed of the circulating pump and the predetermined rotation speed is not greater than a first difference threshold, the actual rotation speed is increased; The second control step is to control the actual output power not to be greater than a second power when the difference is greater than the first difference threshold, the predetermined power includes the first power and the second power, and the second power is less than the first power.

3. The method according to claim 2, characterized in that Before increasing the actual rotation speed, the method further includes: Determine the operating current of the circulation pump corresponding to the actual speed, and obtain the theoretical speed corresponding to the operating current, the preset battery life coefficient of the proton exchange membrane fuel cell, and the preset temperature difference correction coefficient of the proton exchange membrane fuel cell; According to the theoretical rotation speed, the battery life coefficient and the temperature difference correction coefficient, the predetermined rotation speed is calculated as the product of the theoretical rotation speed, the battery life coefficient and the temperature difference correction coefficient.

4. The method according to claim 2, characterized in that: After controlling the actual output power to be not greater than the second power, the method further includes: determining whether the difference is greater than a second difference threshold, the second difference threshold being greater than the first difference threshold; When the difference is greater than the second difference threshold, controlling the fuel cell system to shut down; In a case where the difference is not greater than the second difference threshold, the increasing step and / or the second controlling step is performed.

5. The method according to claim 4, characterized in that Before at least controlling the actual output power of the proton exchange membrane fuel cell to be not greater than a predetermined power, the method further comprises: determining whether the difference is greater than a third difference threshold, the third difference threshold being greater than the second difference threshold; When the difference is greater than the third difference threshold, the fuel cell system is controlled to shut down.

6. The method according to any one of claims 1 to 5, characterized in that The fuel cell system further includes an expansion water tank, which is in communication with the proton exchange membrane fuel cell, and the target information is obtained, including at least one of the following: Acquiring the liquid level of the liquid in the expansion water tank to obtain the coolant level; The inlet coolant temperature and the outlet coolant temperature of the proton exchange membrane fuel cell are obtained, and the difference between the outlet coolant temperature and the inlet coolant temperature is calculated to obtain the coolant temperature difference.

7. The method according to any one of claims 1 to 5, characterized in that At least controlling the actual output power of the proton exchange membrane fuel cell to be no greater than a predetermined power comprises: Determining whether the actual output power is greater than the predetermined power; When the actual output power is greater than the predetermined power, adjusting the actual output power so that the adjusted actual output power is not greater than the predetermined power; When the actual output power is not greater than the predetermined power, the proton exchange membrane fuel cell is controlled to operate at the actual output power.

8. A control device for a fuel cell system, characterized in that: The fuel cell system comprises a proton exchange membrane fuel cell, and the device comprises: An acquisition unit, configured to acquire target information, wherein the target information includes at least one of the following: a coolant level of the proton exchange membrane fuel cell, and a coolant temperature difference between an inlet and an outlet of the proton exchange membrane fuel cell; A first determining unit, configured to determine whether a predetermined condition is satisfied according to the target information, wherein the predetermined condition includes at least one of the following: the coolant level is lower than a predetermined level value, and the coolant temperature difference is greater than a first predetermined temperature; The first control unit is used to at least control the actual output power of the proton exchange membrane fuel cell to be no greater than a predetermined power when the predetermined condition is met, and the predetermined power is less than the rated output power of the proton exchange membrane fuel cell.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the method according to any one of claims 1 to 7.

10. A vehicle, characterized in that: include: Fuel cell systems, including proton exchange membrane fuel cells; An electronic device, comprising one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include a method for executing any one of claims 1 to 7.

Images