Method and device for controlling humidity of cathode inlet of electric pile and computer equipment

Abstract

The invention discloses a stack cathode inlet humidity control method and device and computer equipment. The method comprises the following steps: acquiring the environment temperature and the environment humidity of the environment where the fuel cell system is located; determining a target environment type of the environment where the fuel cell system is located based on the environment temperature and the environment humidity; according to a preset corresponding relation between the environment type and a cooling liquid inlet temperature range, selecting a target temperature range of a cooling liquid inlet of an electric pile in the fuel cell system corresponding to the target environment type; and the cathode inlet humidity of the galvanic pile is controlled by adjusting the cooling liquid inlet temperature of the galvanic pile based on the target temperature range. The technical problem that the pile is too dry or too wet easily when the environment changes drastically is solved.

Description

Technical Field

[0001] This invention relates to the field of fuel cell systems, and more specifically, to a method, apparatus, and computer device for controlling humidity at the cathode inlet of a fuel cell stack. Background Technology

[0002] A fuel cell system is a power generation device that consumes hydrogen and air to produce electricity, heat, and water. It typically consists of a fuel cell stack module, a hydrogen module, an air module, a cooling module, a DC-DC (Direct Current-to-Direct Current Converter) module, and an electronic control module. The air module provides the fuel cell stack module with air of appropriate humidity to prevent the stack from becoming too dry or too wet, which could affect its performance and durability.

[0003] Currently, the air module of a fuel cell system includes an air humidifier, which humidifies dry air before supplying it to the fuel cell stack module. The humidity of the air input to the cathode inlet of the fuel cell stack module needs to be controlled within a certain range. However, the air humidifier is merely a passive component and cannot actively respond to changes in the external environment. When the ambient temperature and humidity change drastically, the humidity of the air supplied to the fuel cell stack module by the air humidifier will also change drastically, ultimately leading to the fuel cell becoming either too dry or too wet.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] This invention provides a method, apparatus, and computer device for controlling the humidity at the cathode inlet of a fuel cell stack, in order to at least solve the technical problem that the fuel cell stack is prone to becoming too dry or too wet when the environment changes drastically.

[0006] According to one aspect of the present invention, a method for controlling the humidity at the cathode inlet of a fuel cell stack is provided, comprising: acquiring the ambient temperature and ambient humidity of the environment in which the fuel cell system is located; determining a target environment type of the environment in which the fuel cell system is located based on the ambient temperature and ambient humidity; selecting a target temperature range for the coolant inlet of the fuel cell stack in the fuel cell system corresponding to the target environment type according to a preset correspondence between the environment type and the coolant inlet temperature range; and controlling the humidity at the cathode inlet of the fuel cell stack by adjusting the coolant inlet temperature of the fuel cell stack based on the target temperature range.

[0007] Optionally, the cathode inlet humidity of the fuel cell stack can be controlled by adjusting the coolant inlet temperature of the fuel cell stack based on a target temperature range, including: adjusting the coolant inlet temperature of the fuel cell stack based on the negative correlation between the coolant inlet temperature and the cathode inlet humidity of the fuel cell stack until the cathode inlet humidity is within a preset humidity range.

[0008] Optionally, the formula for the negative correlation between the coolant inlet temperature and the cathode inlet humidity of the fuel cell stack is as follows:

[0009]

[0010] Among them, relative humidity 阴极入口 The cathode inlet humidity and saturated vapor pressure of the fuel cell stack. 空气露点温度 The saturated vapor pressure is the air dew point temperature at the cathode inlet of the fuel cell stack. 冷却液入口温度 This is the saturated vapor pressure corresponding to the coolant inlet temperature of the fuel cell stack, while the air dew point temperature remains constant.

[0011] Optionally, before selecting the target temperature range of the coolant inlet of the fuel cell stack corresponding to the target environment type based on the preset correspondence between the environment type and the coolant inlet temperature range, the process includes: simulating multiple environments corresponding to the environment type; adjusting the coolant inlet temperature of the fuel cell stack and measuring the cathode inlet humidity of the fuel cell stack under each of the multiple environments until the cathode inlet humidity is within a preset humidity range, recording the coolant inlet temperature of the fuel cell stack, and determining the coolant inlet temperature range corresponding to each of the multiple environments; and determining the preset correspondence between the environment type and the coolant inlet temperature range based on the coolant inlet temperature range corresponding to each of the multiple environments.

[0012] Optionally, based on ambient temperature and ambient humidity, the target environment type of the environment in which the fuel cell system is located is determined, including: based on ambient temperature and ambient humidity and multiple preset ambient temperature ranges and multiple ambient humidity ranges, determining the target ambient temperature range and target ambient humidity range of the environment in which the fuel cell system is located; and based on the target ambient temperature range and target ambient humidity range, determining the target environment type of the environment in which the fuel cell system is located.

[0013] Optionally, the environmental types include low-temperature drying, low-temperature humidification, normal-temperature drying, normal-temperature humidification, high-temperature drying, and high-temperature humidification. Among them, low-temperature drying is the environmental type corresponding to the first ambient temperature range and the first ambient humidity range, low-temperature humidification is the environmental type corresponding to the first ambient temperature range and the second ambient humidity range, normal-temperature drying is the environmental type corresponding to the second ambient temperature range and the first ambient humidity range, normal-temperature humidification is the environmental type corresponding to the second ambient temperature range and the second ambient humidity range, high-temperature drying is the environmental type corresponding to the third ambient temperature range and the first ambient humidity range, and high-temperature humidification is the environmental type corresponding to the third ambient temperature range and the second ambient humidity range.

[0014] Optionally, adjusting the coolant inlet temperature of the fuel cell stack based on a target temperature range includes: determining target parameters for a temperature control module in the fuel cell system based on the target temperature range, wherein the temperature control module characterizes a module that can adjust the coolant inlet temperature of the fuel cell stack; and adjusting the coolant inlet temperature of the fuel cell stack by adjusting the parameters of the temperature control module to the target parameters.

[0015] According to another aspect of the present invention, a fuel cell stack cathode inlet humidity control device is also provided, comprising: an acquisition module for acquiring the ambient temperature and ambient humidity of the environment in which the fuel cell system is located; a determination module for determining a target environment type of the environment in which the fuel cell system is located based on the ambient temperature and ambient humidity; a selection module for selecting a target temperature range of the coolant inlet of the fuel cell stack in the fuel cell system corresponding to the target environment type according to a preset correspondence between the environment type and the coolant inlet temperature range; and a control module for controlling the cathode inlet humidity of the fuel cell stack by adjusting the coolant inlet temperature of the fuel cell stack based on the target temperature range.

[0016] According to another aspect of the present invention, a computer device is also provided, the computer device including a processor for running a program, wherein the program executes any of the above-described methods for controlling the humidity at the cathode inlet of the fuel cell stack.

[0017] According to another aspect of the present invention, a computer program product is also provided, including a computer program that, when executed by a processor, implements any of the above-described methods for controlling the humidity at the cathode inlet of a fuel cell stack.

[0018] In this embodiment of the invention, a method for controlling the humidity at the cathode inlet of the fuel cell stack is adopted. This involves acquiring the ambient temperature and humidity of the environment in which the fuel cell system is located; determining the target environment type based on the ambient temperature and humidity; selecting the target temperature range for the coolant inlet of the fuel cell stack corresponding to the target environment type according to a preset correspondence between the environment type and the coolant inlet temperature range; and controlling the humidity at the cathode inlet of the fuel cell stack by adjusting the coolant inlet temperature based on the target temperature range. This achieves the goal of controlling the humidity at the cathode inlet of the fuel cell stack by adjusting the coolant inlet temperature according to the ambient temperature and humidity, thereby improving the stability and operating efficiency of the fuel cell under different environmental conditions and extending its service life. Furthermore, it solves the technical problem that the fuel cell stack is prone to becoming too dry or too wet when the environment changes drastically. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0020] Figure 1 A hardware block diagram of a computer terminal for implementing a method for controlling the humidity at the cathode inlet of an electric fuel cell stack is shown.

[0021] Figure 2 This is a schematic flowchart of a method for controlling the humidity at the cathode inlet of a fuel cell stack according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the air module of the fuel cell system in the fuel cell stack cathode inlet humidity control method provided by an optional embodiment of the present invention;

[0023] Figure 4 This is a structural block diagram of a fuel cell cathode inlet humidity control device provided according to an embodiment of the present invention. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] According to an embodiment of the present invention, a method for controlling the humidity at the cathode inlet of a fuel cell stack is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0027] The method embodiment provided in Embodiment 1 of this application can be executed on a mobile terminal, computer terminal, or similar computing device. Figure 1A hardware block diagram of a computer terminal for implementing a method for controlling the humidity at the cathode inlet of a fuel cell stack is shown. Figure 1 As shown, the computer terminal 10 may include one or more processors (shown as 102a, 102b, ..., 102n in the figure) (the processor may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of a BUS bus), a network interface, a power supply, and / or a camera. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the aforementioned electronic device. For example, computer terminal 10 may also include... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0028] It should be noted that the aforementioned one or more processors and / or other data processing circuits are generally referred to herein as "data processing circuits". These data processing circuits may be implemented wholly or partially as software, hardware, firmware, or any other combination thereof. Furthermore, the data processing circuits may be a single, independent processing module, or may be wholly or partially integrated into any other element in the computer terminal 10. As involved in the embodiments of this application, the data processing circuits serve as processor control (e.g., selection of a variable resistor termination path connected to an interface).

[0029] The memory 104 can be used to store software programs and modules for application software, such as the program instructions / data storage device corresponding to the fuel cell cathode inlet humidity control method in this embodiment of the invention. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory 104, thereby implementing the aforementioned fuel cell cathode inlet humidity control method. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor, and these remote memories can be connected to the computer terminal 10 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0030] The display may be, for example, a touchscreen liquid crystal display (LCD) that allows the user to interact with the user interface of the computer terminal 10.

[0031] Figure 2This is a schematic flowchart of a method for controlling the humidity at the cathode inlet of a fuel cell stack according to an embodiment of the present invention, as shown below. Figure 2 As shown, the method includes the following steps:

[0032] Step S201: Obtain the ambient temperature and humidity of the environment where the fuel cell system is located.

[0033] In this step, the fuel cell system can be a fuel cell system in a vehicle or a fuel cell system used in stationary power generation. A fuel cell system is a power generation device that consumes hydrogen and air to produce electricity, heat, and water. It generally consists of a fuel cell stack module, a hydrogen module, an air module, a cooling module, a DC / DC (power conversion) module, and an electronic control module. The air module includes an air filter, whose main function is to filter impurities in the air to protect the fuel cell from contamination. The air filter can integrate various sensors to monitor and control the air quality and its flow characteristics, such as pressure sensors, temperature sensors, flow sensors, and humidity sensors. These sensors can calculate accurate dry air quality to meet the cathode metering ratio requirements of the fuel cell stack module. In this embodiment of the invention, the data collected by the temperature and humidity sensors of the air filter can be used as ambient temperature and humidity, thereby adjusting the coolant inlet temperature of the fuel cell stack module to control the cathode inlet humidity.

[0034] Step S202: Based on ambient temperature and ambient humidity, determine the target environment type of the environment in which the fuel cell system is located.

[0035] In this step, based on the needs of practical applications, the environment in which the fuel cell system operates can be classified into different environmental types according to different temperatures and humidity levels. For example, based on different humidity levels, it can be classified as humid or dry, and based on different temperatures, it can be classified as high temperature, low temperature, or normal temperature. Therefore, the corresponding environmental type can be determined based on the different ambient temperatures and humidity levels.

[0036] Step S203: Based on the preset correspondence between environmental type and coolant inlet temperature range, select the target temperature range of the coolant inlet of the fuel cell stack in the fuel cell system corresponding to the target environmental type.

[0037] In this step, in practical applications, installing a humidity sensor at the cathode inlet of a fuel cell stack would be risky due to the high temperatures during stack operation, potentially damaging the sensor and increasing operating costs. Therefore, humidity sensors are not installed in practical applications. To control the cathode inlet humidity in real time based on environmental changes, pre-experimentation can be conducted to determine the coolant inlet temperature range that maintains the cathode inlet humidity within a suitable range under different environmental conditions. This is essentially a pre-defined correspondence between environmental type and coolant inlet temperature range. Based on this pre-defined correspondence, a target coolant inlet temperature range corresponding to the target environmental type can be selected.

[0038] Step S204: Control the cathode inlet humidity of the fuel cell stack by adjusting the coolant inlet temperature of the fuel cell stack based on the target temperature range.

[0039] In this step, when the coolant enters the fuel cell stack and comes into contact with the air at the cathode inlet, the coolant exchanges heat with water vapor in the air. When the coolant inlet temperature is low, the coolant absorbs heat more easily at the heat exchangers inside the fuel cell stack, lowering the internal temperature. At this time, the relative humidity of water vapor inside the fuel cell stack is relatively high, leading to an increase in cathode inlet humidity. Conversely, when the coolant inlet temperature is high, the coolant's ability to absorb heat at the heat exchangers inside the fuel cell stack is weakened, causing the internal temperature to rise. At this time, the relative humidity of water vapor inside the fuel cell stack is relatively low, leading to a decrease in cathode inlet humidity. Therefore, the cathode inlet humidity of the fuel cell stack can be controlled by adjusting the coolant inlet temperature.

[0040] Through the above steps, the goal of controlling the humidity at the cathode inlet of the fuel cell stack is achieved by adjusting the coolant inlet temperature according to the ambient temperature and humidity. This improves the stability and operating efficiency of the fuel cell under different environmental conditions, extends its service life, and solves the technical problem that the fuel cell stack is prone to becoming too dry or too wet when the environment changes drastically.

[0041] As an optional embodiment, the cathode inlet humidity of the fuel cell is controlled by adjusting the coolant inlet temperature of the fuel cell based on a target temperature range, including: adjusting the coolant inlet temperature of the fuel cell based on the negative correlation between the coolant inlet temperature and the cathode inlet humidity of the fuel cell until the cathode inlet humidity is within a preset humidity range.

[0042] Optionally, there is a negative correlation between the coolant inlet temperature and the cathode inlet humidity of the fuel cell stack. Specifically, under normal circumstances, the relative humidity of air is obtained by looking up the saturated vapor pressure from tables based on the air's dew point temperature and air temperature. Different air dew point temperatures and air temperatures have corresponding saturated vapor pressures, which can be obtained from saturated vapor pressure lookup tables for specific air dew point temperature ranges and air temperature ranges. The ratio of these two values ​​is then calculated to obtain the relative humidity, which indicates the cathode inlet humidity of the fuel cell stack. For example, if the saturated vapor pressure corresponding to the dew point temperature is 20 kPa and the saturated vapor pressure corresponding to the gas temperature is 30 kPa, the ratio yields a relative humidity of 66%. However, in fuel cell applications, considering that the specific heat capacity of air is much smaller than that of the bipolar plates and coolant, the air temperature at the cathode inlet cannot reflect the air temperature inside the fuel cell stack. Therefore, using the coolant inlet temperature instead of the air temperature inside the fuel cell stack is more accurate. Therefore, the relative humidity of the air at the cathode inlet is calculated based on the ratio of the dew point temperature of the air at the cathode inlet and the coolant inlet temperature. By adjusting the coolant inlet temperature of the fuel cell stack, the humidity at the cathode inlet can be brought within the preset humidity range.

[0043] As an optional embodiment, the formula for the negative correlation between the coolant inlet temperature and the cathode inlet humidity of the fuel cell stack is as follows:

[0044]

[0045] Among them, relative humidity 阴极入口 The cathode inlet humidity and saturated vapor pressure of the fuel cell stack. 空气露点温度 The saturated vapor pressure is the air dew point temperature at the cathode inlet of the fuel cell stack. 冷却液入口温度 This is the saturated vapor pressure corresponding to the coolant inlet temperature of the fuel cell stack, while the air dew point temperature remains constant.

[0046] Optionally, air dew point temperature refers to the temperature at which air must be cooled to a certain temperature under a specific atmospheric pressure so that water vapor in the air reaches saturation and begins to condense into dew. Air dew point temperature is an important indicator for measuring air humidity. Since the temperature, humidity, and pressure inside the fuel cell stack are relatively stable during operation, the air dew point temperature at the cathode inlet can be considered constant. Therefore, based on the relationship between the relative humidity at the cathode inlet, the saturated vapor pressure corresponding to the air dew point temperature, and the saturated vapor pressure corresponding to the coolant inlet temperature, when the air dew point temperature remains constant, the saturated vapor pressure corresponding to the air dew point temperature also remains constant, meaning the numerator in the formula remains unchanged. Therefore, the relative humidity at the cathode inlet and the saturated vapor pressure corresponding to the coolant inlet temperature are negatively correlated, while the saturated vapor pressure and the coolant inlet temperature are positively correlated. Thus, the relative humidity at the cathode inlet and the coolant inlet temperature are also negatively correlated.

[0047] As an optional embodiment, before selecting the target temperature range of the coolant inlet of the fuel cell stack corresponding to the target environment type based on the preset correspondence between the environment type and the coolant inlet temperature range, the method includes: simulating multiple environments corresponding to the environment type; adjusting the coolant inlet temperature of the fuel cell stack and measuring the cathode inlet humidity of the fuel cell stack under each of the multiple environments until the cathode inlet humidity is within a preset humidity range, recording the coolant inlet temperature of the fuel cell stack, and determining the coolant inlet temperature range corresponding to each of the multiple environments; and determining the preset correspondence between the environment type and the coolant inlet temperature range based on the coolant inlet temperature range corresponding to each of the multiple environments.

[0048] Optionally, in practical applications, there is no humidity sensor at the cathode inlet of the fuel cell module. However, the humidity of the air input to the cathode inlet of the fuel cell module needs to be controlled within a certain range. Therefore, a humidity sensor can be temporarily added at the cathode inlet of the fuel cell module in a laboratory setting to measure the humidity at the cathode inlet. Figure 3 This is a schematic diagram of the structure of the air module of the fuel cell system in the fuel cell stack cathode inlet humidity control method provided by an optional embodiment of the present invention, as shown below. Figure 3 As shown, the fuel cell system may include an air filter module, an air compressor, an intercooler, a humidifier, a front shut-off valve, a stack module, and a rear shut-off valve. Figure 3 In this context, P, T, and RH represent pressure sensor, temperature sensor, and humidity sensor, respectively. The newly added humidity sensor should be placed as close as possible to the fuel cell stack and can be installed on the busbar on the cathode side of the fuel cell stack. Pressure and temperature sensors can also be installed at the cathode inlet of the fuel cell stack. Air enters from the air inlet, passes through the air filter, air compressor, intercooler, and humidifier in sequence, and then flows into the fuel cell stack module through the front shut-off valve.

[0049] During the laboratory simulation, the environmental parameters of the laboratory can be modified first to simulate environmental types such as low temperature dryness, low temperature humidity, normal temperature dryness, normal temperature humidity, high temperature dryness, and high temperature humidity. Then, under the corresponding environment of each environmental type, the coolant inlet temperature of the fuel cell module is adjusted so that the cathode inlet humidity of the fuel cell module is within a suitable range, thus obtaining the coolant inlet temperature corresponding to different environmental types.

[0050] The range of humidity at the cathode inlet of the fuel cell stack module is determined based on actual requirements. Specifically, because the fuel cell stack generates water during operation, the relative humidity at the cathode outlet is usually saturated and often accompanied by liquid water. Therefore, only the humidity control at the cathode inlet needs to be considered. If the coolant inlet temperature of the fuel cell stack remains constant, the relative humidity at the cathode inlet can range from 20% to 100% when the ambient temperature and humidity change drastically. However, considering durability and reliability, the required relative humidity range at the cathode inlet should be between 40% and 60%. Below this range, there is a risk of the fuel cell stack being too dry; above this range, there is a risk of the fuel cell stack being too wet. In this case, by adjusting the coolant inlet temperature, the relative humidity at the cathode inlet of the fuel cell stack can be controlled to meet the fuel cell stack's requirements.

[0051] As an optional embodiment, the target environment type of the fuel cell system is determined based on ambient temperature and ambient humidity, including: determining the target ambient temperature range and target ambient humidity range of the fuel cell system based on ambient temperature and ambient humidity and multiple preset ambient temperature ranges and multiple ambient humidity ranges; and determining the target environment type of the fuel cell system based on the target ambient temperature range and target ambient humidity range.

[0052] Optionally, depending on the needs of the actual application, the ambient temperature can be divided into multiple temperature ranges. Based on the relative temperatures within these three ranges, they can be defined as a low-temperature range, a normal-temperature range, and a high-temperature range, respectively. Similarly, the ambient humidity can be divided into multiple humidity ranges. Based on the relative humidity levels within two humidity ranges, these ranges can be defined as a dry range and a humid range, respectively. Based on these pre-set ambient temperature and humidity ranges, the target temperature and humidity ranges corresponding to the environment in which the fuel cell system operates can be determined, thereby identifying the corresponding environmental type.

[0053] As an optional embodiment, the environmental types include low-temperature drying, low-temperature humidification, room-temperature drying, room-temperature humidification, high-temperature drying, and high-temperature humidification. Specifically, low-temperature drying corresponds to the environmental type corresponding to the first ambient temperature range and the first ambient humidity range, low-temperature humidification corresponds to the environmental type corresponding to the first ambient temperature range and the second ambient humidity range, room-temperature drying corresponds to the environmental type corresponding to the second ambient temperature range and the first ambient humidity range, room-temperature humidification corresponds to the environmental type corresponding to the second ambient temperature range and the second ambient humidity range, high-temperature drying corresponds to the environmental type corresponding to the third ambient temperature range and the first ambient humidity range, and high-temperature humidification corresponds to the environmental type corresponding to the third ambient temperature range and the second ambient humidity range.

[0054] Optionally, the temperature and humidity values ​​differ across multiple ambient temperature and humidity ranges. For example, the maximum value in the first temperature range is less than the minimum value in the second temperature range, and the maximum value in the second temperature range is less than the minimum value in the third temperature range. Therefore, based on the temperature relationships within the three temperature ranges, the three ranges can be defined sequentially as a low-temperature range, a normal-temperature range, and a high-temperature range. Similarly, the maximum value in the first humidity range is less than the minimum value in the second humidity range. Therefore, based on the humidity relationships within the two humidity ranges, the two humidity ranges can be defined sequentially as a dry range and a humid range.

[0055] In practical applications, such as vehicle operation or stationary power generation, where ambient temperature and humidity are not controlled, various environmental types can arise. Depending on the application requirements, the aforementioned low-temperature, normal-temperature, and high-temperature ranges can be combined with dry and humid ranges to obtain six different environmental types: low-temperature dry, low-temperature humid, normal-temperature dry, normal-temperature humid, high-temperature dry, and high-temperature humid. These different environmental types reflect variations in ambient temperature and humidity. Therefore, the fuel cell system only needs to determine the corresponding environmental type based on the temperature and humidity sensor parameters of the air filter in the air module, thus appropriately adjusting the coolant inlet temperature of the fuel cell stack module to meet the humidity control requirements of the cathode inlet of the fuel cell stack module.

[0056] As an optional embodiment, adjusting the coolant inlet temperature of the fuel cell stack based on a target temperature range includes: determining target parameters for a temperature control module in the fuel cell system based on the target temperature range, wherein the temperature control module characterizes a module that can adjust the coolant inlet temperature of the fuel cell stack; and adjusting the coolant inlet temperature of the fuel cell stack by adjusting the parameters of the temperature control module to the target parameters.

[0057] Alternatively, in a fuel cell system, the coolant inlet temperature can be adjusted in several ways. For example, the heat exchange rate between the coolant and the surrounding environment can be changed by adjusting the speed of the cooling fan, thereby affecting the coolant temperature; the coolant temperature can also be changed by adjusting the power of the heater; or a flow control valve can be used to regulate the coolant flow rate, thereby affecting its temperature. Therefore, the parameters of the temperature control module can include the speed of the cooling fan, the power of the heater, and the opening degree of the flow control valve.

[0058] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0059] Through the above description of the embodiments, those skilled in the art can clearly understand that the fuel cell cathode inlet humidity control method according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0060] According to embodiments of the present invention, a fuel cell cathode inlet humidity control device for implementing the above-described fuel cell cathode inlet humidity control method is also provided. Figure 4 This is a structural block diagram of a fuel cell cathode inlet humidity control device provided according to an embodiment of the present invention, as shown below. Figure 4 As shown, the fuel cell cathode inlet humidity control device includes: an acquisition module 41, a determination module 42, a selection module 43, and a control module 44. The fuel cell cathode inlet humidity control device will be described below.

[0061] The acquisition module 41 is used to acquire the ambient temperature and humidity of the environment in which the fuel cell system is located.

[0062] The determination module 42, connected to the acquisition module 41, is used to determine the target environment type of the fuel cell system based on ambient temperature and ambient humidity.

[0063] Select module 43, connected to determine module 42, is used to select the target temperature range of the coolant inlet of the fuel cell stack in the fuel cell system corresponding to the target environment type, based on the preset correspondence between the environment type and the coolant inlet temperature range.

[0064] The control module 44, connected to the selection module 43, is used to control the cathode inlet humidity of the fuel cell stack by adjusting the coolant inlet temperature of the fuel cell stack based on a target temperature range.

[0065] It should be noted that the acquisition module 41, determination module 42, selection module 43, and control module 44 mentioned above correspond to steps S201 to S204 in the embodiments. Multiple modules and their corresponding steps implement the same instances and application scenarios, but are not limited to the content disclosed in the above embodiments. It should also be noted that the above modules, as part of the device, can run on the computer terminal 10 provided in the embodiments.

[0066] Embodiments of the present invention may provide a computer device. Optionally, in this embodiment, the computer device may be located in at least one of a plurality of network devices in a computer network. The computer device includes a memory and a processor.

[0067] The memory can be used to store software programs and modules, such as the program instructions / modules corresponding to the fuel cell cathode inlet humidity control method and apparatus in this embodiment of the invention. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory, thereby realizing the aforementioned fuel cell cathode inlet humidity control method. The memory may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory may further include memory remotely located relative to the processor, and these remote memories can be connected to a computer terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0068] The processor can access the information and application programs stored in the memory via the transmission device to perform the following steps: acquire the ambient temperature and humidity of the environment in which the fuel cell system is located; determine the target environment type of the environment in which the fuel cell system is located based on the ambient temperature and humidity; select the target temperature range of the coolant inlet of the fuel cell stack corresponding to the target environment type according to the preset correspondence between the environment type and the coolant inlet temperature range; and control the cathode inlet humidity of the fuel cell stack by adjusting the coolant inlet temperature of the fuel cell stack based on the target temperature range.

[0069] Optionally, the processor may also execute program code that performs the following steps: controlling the cathode inlet humidity of the fuel cell by adjusting the coolant inlet temperature of the fuel cell based on a target temperature range, including: adjusting the coolant inlet temperature of the fuel cell based on the negative correlation between the coolant inlet temperature and the cathode inlet humidity of the fuel cell until the cathode inlet humidity is within a preset humidity range.

[0070] Optionally, the processor may also execute program code for the following steps: The formula for the negative correlation between the coolant inlet temperature and the cathode inlet humidity of the fuel cell stack is as follows:

[0071]

[0072] Among them, relative humidity 阴极入口 The cathode inlet humidity and saturated vapor pressure of the fuel cell stack. 空气露点温度 The saturated vapor pressure is the air dew point temperature at the cathode inlet of the fuel cell stack. 冷却液入口温度 This is the saturated vapor pressure corresponding to the coolant inlet temperature of the fuel cell stack, while the air dew point temperature remains constant.

[0073] Optionally, the processor may also execute program code with the following steps: before selecting the target temperature range of the coolant inlet of the fuel cell stack corresponding to the target environment type based on the preset correspondence between the environment type and the coolant inlet temperature range, the following steps are included: simulating multiple environments corresponding to the environment type; adjusting the coolant inlet temperature of the fuel cell stack and measuring the cathode inlet humidity of the fuel cell stack under each of the multiple environments until the cathode inlet humidity is within a preset humidity range, recording the coolant inlet temperature of the fuel cell stack, and determining the coolant inlet temperature range corresponding to each of the multiple environments; and determining the preset correspondence between the environment type and the coolant inlet temperature range based on the coolant inlet temperature range corresponding to each of the multiple environments.

[0074] Optionally, the processor may also execute program code that performs the following steps: determining the target environment type of the fuel cell system based on ambient temperature and ambient humidity, including: determining the target ambient temperature range and target ambient humidity range of the fuel cell system based on ambient temperature and ambient humidity and multiple preset ambient temperature ranges and multiple ambient humidity ranges; and determining the target environment type of the fuel cell system based on the target ambient temperature range and target ambient humidity range.

[0075] Optionally, the processor may also execute program code for the following steps: the environment type includes low-temperature drying, low-temperature humidity, room-temperature drying, room-temperature humidity, high-temperature drying, and high-temperature humidity, wherein low-temperature drying is the environment type corresponding to the first ambient temperature range and the first ambient humidity range, low-temperature humidity is the environment type corresponding to the first ambient temperature range and the second ambient humidity range, room-temperature drying is the environment type corresponding to the second ambient temperature range and the first ambient humidity range, room-temperature humidity is the environment type corresponding to the second ambient temperature range and the second ambient humidity range, high-temperature drying is the environment type corresponding to the third ambient temperature range and the first ambient humidity range, and high-temperature humidity is the environment type corresponding to the third ambient temperature range and the second ambient humidity range.

[0076] Optionally, the processor may also execute program code for the following steps: adjusting the coolant inlet temperature of the fuel cell stack based on a target temperature range, including: determining the target parameters of the temperature control module in the fuel cell system based on the target temperature range, wherein the temperature control module represents a module that can adjust the coolant inlet temperature of the fuel cell stack; adjusting the coolant inlet temperature of the fuel cell stack by adjusting the parameters of the temperature control module to the target parameters.

[0077] This invention provides a method for controlling the humidity at the cathode inlet of a fuel cell stack. The method involves acquiring the ambient temperature and humidity of the environment in which the fuel cell system operates; determining the target environment type based on these parameters; selecting a target temperature range for the coolant inlet of the fuel cell stack corresponding to the target environment type, based on a preset correspondence between the environment type and the coolant inlet temperature range; and controlling the humidity at the cathode inlet of the fuel cell stack by adjusting the coolant inlet temperature based on the target temperature range. This achieves the goal of controlling the humidity at the cathode inlet of the fuel cell stack by adjusting the coolant inlet temperature according to the ambient temperature and humidity, thereby improving the stability and operating efficiency of the fuel cell under different environmental conditions, extending its service life, and solving the technical problem of the fuel cell stack becoming too dry or too wet when the environment changes drastically.

[0078] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing the hardware related to the terminal device. The program can be stored in a non-volatile storage medium, which may include: flash drive, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, etc.

[0079] Embodiments of the present invention also provide a non-volatile storage medium. Optionally, in this embodiment, the aforementioned non-volatile storage medium can be used to store the program code executed by the fuel cell cathode inlet humidity control method provided in the above embodiments.

[0080] Optionally, in this embodiment, the non-volatile storage medium may be located in any computer terminal in a group of computer terminals in a computer network, or in any mobile terminal in a group of mobile terminals.

[0081] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: obtaining the ambient temperature and humidity of the environment in which the fuel cell system is located; determining the target environment type of the environment in which the fuel cell system is located based on the ambient temperature and humidity; selecting the target temperature range of the coolant inlet of the fuel cell stack corresponding to the target environment type according to a preset correspondence between the environment type and the coolant inlet temperature range; and controlling the cathode inlet humidity of the fuel cell stack by adjusting the coolant inlet temperature of the fuel cell stack based on the target temperature range.

[0082] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: controlling the cathode inlet humidity of the fuel cell by adjusting the coolant inlet temperature of the fuel cell based on a target temperature range, including: adjusting the coolant inlet temperature of the fuel cell based on the negative correlation between the coolant inlet temperature and the cathode inlet humidity of the fuel cell until the cathode inlet humidity is within a preset humidity range.

[0083] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps:

[0084] The formula for the negative correlation between the coolant inlet temperature and the cathode inlet humidity of the fuel cell stack is as follows:

[0085]

[0086] Among them, relative humidity 阴极入口 The cathode inlet humidity and saturated vapor pressure of the fuel cell stack. 空气露点温度 The saturated vapor pressure is the air dew point temperature at the cathode inlet of the fuel cell stack. 冷却液入口温度 This is the saturated vapor pressure corresponding to the coolant inlet temperature of the fuel cell stack, while the air dew point temperature remains constant.

[0087] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: before selecting the target temperature range of the coolant inlet of the fuel cell stack corresponding to the target environment type according to the preset correspondence between the environment type and the coolant inlet temperature range, the steps include: simulating multiple environments corresponding to the environment type; adjusting the coolant inlet temperature of the fuel cell stack and measuring the cathode inlet humidity of the fuel cell stack under each of the multiple environments, until the cathode inlet humidity is within a preset humidity range, recording the coolant inlet temperature of the fuel cell stack, and determining the coolant inlet temperature range corresponding to each of the multiple environments; and determining the preset correspondence between the environment type and the coolant inlet temperature range based on the coolant inlet temperature range corresponding to each of the multiple environments.

[0088] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: determining the target environment type of the environment in which the fuel cell system is located based on ambient temperature and ambient humidity, including: determining the target ambient temperature range and target ambient humidity range of the environment in which the fuel cell system is located based on ambient temperature and ambient humidity and multiple preset ambient temperature ranges and multiple ambient humidity ranges; and determining the target environment type of the environment in which the fuel cell system is located based on the target ambient temperature range and target ambient humidity range.

[0089] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: the environment type includes low-temperature drying, low-temperature humidification, room-temperature drying, room-temperature humidification, high-temperature drying, and high-temperature humidification, wherein low-temperature drying is the environment type corresponding to the first ambient temperature range and the first ambient humidity range, low-temperature humidification is the environment type corresponding to the first ambient temperature range and the second ambient humidity range, room-temperature drying is the environment type corresponding to the second ambient temperature range and the first ambient humidity range, room-temperature humidification is the environment type corresponding to the second ambient temperature range and the second ambient humidity range, high-temperature drying is the environment type corresponding to the third ambient temperature range and the first ambient humidity range, and high-temperature humidification is the environment type corresponding to the third ambient temperature range and the second ambient humidity range.

[0090] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: adjusting the coolant inlet temperature of the fuel cell stack based on a target temperature range, including: determining target parameters of a temperature control module in the fuel cell system based on the target temperature range, wherein the temperature control module characterizes a module that can adjust the coolant inlet temperature of the fuel cell stack; adjusting the coolant inlet temperature of the fuel cell stack by adjusting the parameters of the temperature control module to the target parameters.

[0091] Embodiments of the present invention also provide a computer program product, including a computer program. Optionally, in this embodiment, when the computer program is executed by a processor, it can: acquire the ambient temperature and ambient humidity of the environment in which the fuel cell system is located; determine the target environment type of the environment in which the fuel cell system is located based on the ambient temperature and ambient humidity; select the target temperature range of the coolant inlet of the fuel cell stack corresponding to the target environment type according to a preset correspondence between the environment type and the coolant inlet temperature range; and control the cathode inlet humidity of the fuel cell stack by adjusting the coolant inlet temperature of the fuel cell stack based on the target temperature range.

[0092] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0093] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0094] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0095] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0096] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0097] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a non-volatile storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0098] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for controlling the humidity at the cathode inlet of a fuel cell stack, characterized in that, include: Obtain the ambient temperature and humidity of the environment in which the fuel cell system is located; Based on the ambient temperature and the ambient humidity, the target environment type of the environment in which the fuel cell system is located is determined; Based on the preset correspondence between environmental type and coolant inlet temperature range, select the target temperature range of coolant inlet of the fuel cell stack in the fuel cell system corresponding to the target environmental type; The cathode inlet humidity of the fuel cell is controlled by adjusting the coolant inlet temperature of the fuel cell based on the target temperature range.

2. The method according to claim 1, characterized in that, The method of controlling the cathode inlet humidity of the fuel cell stack by adjusting the coolant inlet temperature based on the target temperature range includes: Based on the negative correlation between the coolant inlet temperature and the cathode inlet humidity of the fuel cell stack, the coolant inlet temperature of the fuel cell stack is adjusted until the cathode inlet humidity is within a preset humidity range.

3. The method according to claim 2, characterized in that, The formula for the negative correlation between the coolant inlet temperature and the cathode inlet humidity of the fuel cell stack is as follows: Among them, relative humidity 阴极入口 The cathode inlet humidity and saturated vapor pressure of the fuel cell stack are given by the following parameters: 空气露点温度 The saturated vapor pressure is the air dew point temperature corresponding to the cathode inlet of the fuel cell stack. 冷却液入口温度 The saturated vapor pressure is the temperature at which the coolant enters the fuel cell stack, while the air dew point temperature remains constant.

4. The method according to claim 1, characterized in that, Before selecting the target temperature range of the coolant inlet of the fuel cell stack in the fuel cell system corresponding to the target environment type based on the preset correspondence between the environment type and the coolant inlet temperature range, the process includes: Simulate multiple environments corresponding to the aforementioned environment type; In each of the multiple environments, the coolant inlet temperature of the fuel cell stack is adjusted and the cathode inlet humidity of the fuel cell stack is measured until the cathode inlet humidity is within a preset humidity range. The coolant inlet temperature of the fuel cell stack is then recorded to determine the coolant inlet temperature range corresponding to each of the multiple environments. Based on the coolant inlet temperature range corresponding to each of the multiple environments, a preset correspondence between the environment type and the coolant inlet temperature range is determined.

5. The method according to claim 1, characterized in that, The determination of the target environment type of the fuel cell system based on the ambient temperature and the ambient humidity includes: Based on the ambient temperature and humidity and multiple preset ambient temperature and humidity ranges, the target ambient temperature range and target ambient humidity range of the environment in which the fuel cell system is located are determined. Based on the target range of ambient temperature and the target range of ambient humidity, the target environment type of the environment in which the fuel cell system is located is determined.

6. The method according to claim 1, characterized in that, The environmental types include low-temperature drying, low-temperature humidity, room-temperature drying, room-temperature humidity, high-temperature drying, and high-temperature humidity. Specifically, low-temperature drying corresponds to the environmental type between a first ambient temperature range and a first ambient humidity range; low-temperature humidity corresponds to the environmental type between the first ambient temperature range and a second ambient humidity range; room-temperature drying corresponds to the environmental type between the second ambient temperature range and the first ambient humidity range; room-temperature humidity corresponds to the environmental type between the second ambient temperature range and the second ambient humidity range; high-temperature drying corresponds to the environmental type between the third ambient temperature range and the first ambient humidity range; and high-temperature humidity corresponds to the environmental type between the third ambient temperature range and the second ambient humidity range.

7. The method according to any one of claims 1 to 6, characterized in that, Adjusting the coolant inlet temperature of the fuel cell stack based on the target temperature range includes: Based on the target temperature range, the target parameters of the temperature control module in the fuel cell system are determined, wherein the temperature control module characterizes a module that can adjust the coolant inlet temperature of the fuel cell stack. The coolant inlet temperature of the fuel cell stack is adjusted by adjusting the parameters of the temperature control module to the target parameters.

8. A humidity control device for the cathode inlet of a fuel cell stack, characterized in that, include: The acquisition module is used to acquire the ambient temperature and humidity of the environment in which the fuel cell system is located. The determination module is used to determine the target environment type of the environment in which the fuel cell system is located based on the ambient temperature and the ambient humidity; The selection module is used to select the target temperature range of the coolant inlet of the fuel cell stack in the fuel cell system corresponding to the target environment type, based on a preset correspondence between the environment type and the coolant inlet temperature range. A control module is used to control the cathode inlet humidity of the fuel cell stack by adjusting the coolant inlet temperature of the fuel cell stack based on the target temperature range.

9. A computer device, characterized in that, include: Memory and processor The memory stores computer programs; The processor is configured to execute a computer program stored in the memory, wherein when the computer program is executed, the processor performs the cathode inlet humidity control method of any one of claims 1 to 7.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the cathode inlet humidity control method of any one of claims 1 to 7.

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