Humidity control method and device for fuel cell engine, vehicle and storage medium

Abstract

The invention relates to the technical field of fuel cells, in particular to a humidity control method and device for a fuel cell engine, a vehicle and a storage medium, and the method comprises the steps: obtaining the current stack working power of a target fuel cell engine, obtaining a current working interval of a stack, and matching a target parameter set of the stack, and detecting whether the current actual humidity of the galvanic pile meets a preset environment monitoring condition according to the target parameter set, if so, determining a target humidity control mode of the galvanic pile based on the current environment humidity and the target parameter set, and controlling the target fuel cell engine to execute a corresponding humidity control action. According to the embodiment of the invention, the corresponding humidity evaluation parameters can be confirmed based on different powers of the fuel cell engine, and the humidity state of the stack is judged by combining the stack humidity and the environment humidity to confirm the humidity control mode to carry out corresponding drying treatment, so that accurate control of the humidity of the fuel cell is realized, and the drying efficiency is improved. And the running stability and safety of the fuel cell are ensured.

Description

Technical Field

[0001] The present application relates to the field of fuel cell technology, and in particular to a humidity control method, device, vehicle and storage medium for a fuel cell engine. Background Art

[0002] With the rapid growth of the new energy vehicle market, hydrogen fuel cell vehicles have gradually become one of the important development directions in the field of new energy vehicles in the future due to their advantages such as zero emissions, fast hydrogen refueling, and long driving range. Among them, the proton exchange membrane fuel cell (PEMFC) is a hydrogen fuel cell technology for vehicles. The anode air and cathode hydrogen generate electricity and produce water under the action of the catalyst in the membrane electrode, and the water production rate is different at different powers. In related technologies, when the proton exchange membrane fuel cell is in the high-power range, water flooding will occur, resulting in a decrease in reaction efficiency and affecting the reliability of the battery stack. The drainage can be carried out by adding an additional bypass line and bypass valve next to the humidifier.

[0003] However, in the related art, adding a bypass line and a bypass valve to the air system of the proton exchange membrane fuel cell may cause pipeline pressure fluctuations, increase the difficulty of humidity control, lead to expansion of the overall volume, increase costs, and fail to adjust the ambient humidity. It is difficult to deal with the phenomenon of fuel cell stack flooding caused by high ambient humidity, which affects the working efficiency of the fuel cell stack and reduces the accuracy of fuel cell humidity control, which needs to be solved urgently. Summary of the invention

[0004] The present application provides a humidity control method, device, vehicle and storage medium for a fuel cell engine to solve the problems in the related art that adding a bypass line and a bypass valve to the air system of a proton exchange membrane fuel cell may cause pipeline pressure fluctuations, increase the difficulty of humidity control, lead to expansion of the overall machine volume, increase costs, and cannot adjust the ambient humidity, making it difficult to deal with the flooding of the fuel cell stack caused by high ambient humidity, affecting the working efficiency of the fuel cell stack, and reducing the accuracy of the humidity control of the fuel cell.

[0005] The first aspect of the present application provides a humidity control method for a fuel cell engine, comprising the following steps: acquiring the current stack operating power of a target fuel cell engine, and obtaining the current operating range of the stack based on the current stack operating power; matching a target parameter set of the stack according to the current operating range, and detecting whether the current actual humidity of the stack meets preset environmental monitoring conditions according to the target parameter set; when the current actual humidity meets the preset environmental monitoring conditions, confirming a target humidity control mode of the stack based on the current ambient humidity of the target fuel cell engine and the target parameter set, generating at least one humidity control action based on the target humidity control mode, and controlling the target fuel cell engine to perform the at least one humidity control action until the stack exits the target humidity control mode.

[0006] Through the above technical scheme, the corresponding humidity evaluation parameters can be confirmed based on the different powers of the fuel cell engine, and the humidity state of the fuel cell stack can be determined in combination with the stack humidity and the ambient humidity, so as to confirm the humidity control mode and perform the corresponding drying treatment, thereby achieving precise control of the fuel cell humidity, ensuring the stability and safety of the fuel cell operation, and being more practical.

[0007] Optionally, in one embodiment of the present application, before detecting whether the current actual humidity of the battery stack meets the preset environmental monitoring conditions according to the target parameter set, it also includes: obtaining the current target humidity of the battery stack under the current current, and calculating the current water accumulation threshold based on the first humidity coefficient of the target parameter set and the current target humidity; when the current actual humidity is greater than or equal to the current water accumulation threshold, determining that the target humidity control mode is a completely dry mode.

[0008] Through the above technical solution, the current target humidity of the battery stack under the current current can be obtained, and the current water accumulation threshold can be calculated based on the first humidity coefficient of the target parameter set and the current target humidity. When the current actual humidity is greater than or equal to the current water accumulation threshold, the target humidity control mode is determined to be a completely dry mode, so that the battery stack can be switched to the completely dry mode in time when the humidity of the battery stack is too high, so as to prevent performance degradation or even damage caused by excessive moisture inside the battery stack.

[0009] Optionally, in one embodiment of the present application, detecting whether the current actual humidity of the fuel cell stack meets the preset environmental monitoring conditions according to the target parameter set includes: when the current actual humidity is less than the current water accumulation threshold, calculating the current safety threshold based on the second humidity coefficient of the target parameter set and the current target humidity, wherein the second humidity coefficient is less than the first humidity coefficient; judging whether the current actual humidity is greater than or equal to the current safety threshold; if the current actual humidity is greater than or equal to the current safety threshold, determining that the current actual humidity meets the preset environmental monitoring conditions, otherwise, determining that the target humidity control mode is the stop drying mode.

[0010] Through the above technical solution, when the current actual humidity is lower than the current water accumulation threshold, the current safety threshold can be calculated based on the second humidity coefficient of the target parameter set and the current target humidity. If the current actual humidity is greater than or equal to the current safety threshold, it is determined that the current actual humidity meets the preset environmental monitoring conditions. Otherwise, the target humidity control mode is determined to be the stop drying mode to ensure that the drying measures are stopped in time, thereby reducing cost consumption and more accurately controlling the humidity of the fuel cell stack.

[0011] Optionally, in one embodiment of the present application, the target humidity control mode of the fuel cell stack is confirmed based on the current ambient humidity of the target fuel cell engine and the target parameter set, including: obtaining a first ambient humidity threshold of the target parameter set, and determining whether the current ambient humidity is greater than or equal to the first ambient humidity threshold; if the current ambient humidity is greater than or equal to the first ambient humidity threshold, determining that the target humidity control mode is a completely dry mode, otherwise, confirming the target humidity control mode based on a second ambient humidity threshold of the target parameter set.

[0012] Through the above technical solution, the first ambient humidity threshold of the target parameter set can be obtained. If the current ambient humidity is greater than or equal to the first ambient humidity threshold, the target humidity control mode is determined to be the completely dry mode. Otherwise, the target humidity control mode is confirmed based on the second ambient humidity threshold of the target parameter set. By setting different ambient humidity thresholds, hierarchical management of humidity control is achieved, which improves the flexibility and accuracy of humidity control.

[0013] Optionally, in one embodiment of the present application, the target humidity control mode is confirmed based on the second ambient humidity threshold of the target parameter set, including: determining whether the current ambient humidity is greater than or equal to the second ambient humidity threshold, wherein the second ambient humidity threshold is less than the first ambient humidity threshold; if the current ambient humidity is greater than or equal to the second ambient humidity threshold, then determining that the target humidity control mode is a partial drying mode, otherwise, determining that the target humidity control mode is a stop drying mode.

[0014] Through the above technical solution, when the current ambient humidity is greater than or equal to the second ambient humidity threshold, the target humidity control mode can be determined to be the partial drying mode; otherwise, the target humidity control mode can be determined to be the stop drying mode, thereby automatically adjusting the humidity control strategy according to different ambient humidity conditions and being able to adapt to different working environments.

[0015] A second aspect of the present application provides a humidity control device for a fuel cell engine, including: an acquisition module, used to acquire the current stack operating power of a target fuel cell engine, and obtain the current operating range of the stack based on the current stack operating power; a detection module, used to match a target parameter set of the stack according to the current operating range, and detect whether the current actual humidity of the stack meets preset environmental monitoring conditions according to the target parameter set; a control module, used to confirm a target humidity control mode of the stack based on the current ambient humidity of the target fuel cell engine and the target parameter set when the current actual humidity meets the preset environmental monitoring conditions, generate at least one humidity control action based on the target humidity control mode, and control the target fuel cell engine to perform the at least one humidity control action until the stack exits the target humidity control mode.

[0016] Optionally, in one embodiment of the present application, the device also includes: a calculation module, used to obtain the current target humidity of the battery stack under the current current before detecting whether the current actual humidity of the battery stack meets the preset environmental monitoring conditions according to the target parameter set, and calculate the current water accumulation threshold based on the first humidity coefficient of the target parameter set and the current target humidity; a judgment module, used to judge that the target humidity control mode is a completely dry mode when the current actual humidity is greater than or equal to the current water accumulation threshold.

[0017] Optionally, in one embodiment of the present application, the detection module includes: a calculation unit, used to calculate the current safety threshold based on the second humidity coefficient of the target parameter set and the current target humidity when the current actual humidity is less than the current water accumulation threshold, wherein the second humidity coefficient is less than the first humidity coefficient; a first judgment unit, used to judge whether the current actual humidity is greater than or equal to the current safety threshold; the first judgment unit is used to judge that the current actual humidity meets the preset environmental monitoring condition when the current actual humidity is greater than or equal to the current safety threshold, otherwise, judge that the target humidity control mode is the stop drying mode.

[0018] Optionally, in one embodiment of the present application, the control module includes: a second judgment unit, used to obtain a first ambient humidity threshold of the target parameter set, and determine whether the current ambient humidity is greater than or equal to the first ambient humidity threshold; a second judgment unit, used to determine that the target humidity control mode is a completely dry mode when the current ambient humidity is greater than or equal to the first ambient humidity threshold, otherwise, confirming the target humidity control mode based on the second ambient humidity threshold of the target parameter set.

[0019] Optionally, in one embodiment of the present application, the second determination unit is specifically used to: determine whether the current ambient humidity is greater than or equal to the second ambient humidity threshold, wherein the second ambient humidity threshold is less than the first ambient humidity threshold; when the current ambient humidity is greater than or equal to the second ambient humidity threshold, determine that the target humidity control mode is a partial drying mode, otherwise, determine that the target humidity control mode is a stop drying mode.

[0020] A third aspect of the present application provides a vehicle, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the humidity control method for the fuel cell engine as described in the above embodiment.

[0021] A fourth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, which, when executed by a processor, implements the above-mentioned humidity control method for a fuel cell engine.

[0022] A fifth aspect of the present application provides a computer program, which, when executed, implements the above-mentioned humidity control method for a fuel cell engine.

[0023] The embodiment of the present application confirms the corresponding humidity evaluation parameters based on the different powers of the fuel cell engine, and determines the humidity state of the stack in combination with the stack humidity and the ambient humidity, so as to confirm the humidity control mode and perform the corresponding drying treatment, thereby realizing the precise control of the humidity of the fuel cell, ensuring the stability and safety of the fuel cell operation, and being more practical. Thus, the problem in the related art that adding a bypass line and a bypass valve to the air system of the proton exchange membrane fuel cell may cause pipeline pressure fluctuations, increase the difficulty of humidity control, lead to the expansion of the whole machine volume, increase the cost, and cannot adjust the ambient humidity, making it difficult to deal with the flooding of the stack due to high ambient humidity, affecting the working efficiency of the stack, and reducing the accuracy of the humidity control of the fuel cell.

[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0026] Figure 1 A flow chart of a humidity control method for a fuel cell engine provided according to an embodiment of the present application;

[0027] Figure 2 A schematic structural diagram of a humidity management system for a fuel cell engine according to an embodiment of the present application;

[0028] Figure 3 This is a schematic structural diagram of an air filter with an integrated drying layer according to an embodiment of the present application;

[0029] Figure 4 A humidity control logic diagram of a fuel cell engine according to an embodiment of the present application;

[0030] Figure 5 is a structural schematic diagram of a humidity control device for a fuel cell engine according to an embodiment of the present application;

[0031] Figure 6 It is a schematic diagram of the structure of a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0032] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0033] The humidity control method, device, vehicle and storage medium of the fuel cell engine of the embodiment of the present application are described below with reference to the accompanying drawings. In view of the related technologies mentioned in the above background technology, adding a bypass line and a bypass valve to the air system of the proton exchange membrane fuel cell may cause pipeline pressure fluctuations, increase the difficulty of humidity control, and lead to the expansion of the whole machine volume, increase the cost, and cannot adjust the ambient humidity, and it is difficult to deal with the problem of water flooding of the stack due to high ambient humidity, which affects the working efficiency of the stack and reduces the accuracy of the humidity control of the fuel cell. The present application provides a humidity control method for a fuel cell engine, in which the corresponding humidity evaluation parameters are confirmed based on the different powers of the fuel cell engine, and the humidity state of the stack is determined in combination with the stack humidity and the ambient humidity, so as to confirm the humidity control mode and perform the corresponding drying treatment, thereby realizing the precise control of the humidity of the fuel cell, ensuring the stability and safety of the operation of the fuel cell, and being more practical. This solves the problem in the related art that adding a bypass line and a bypass valve to the air system of the proton exchange membrane fuel cell may cause pipeline pressure fluctuations, increase the difficulty of humidity control, lead to expansion of the overall machine size, increase costs, and make it impossible to adjust the ambient humidity, making it difficult to deal with flooding of the fuel cell stack due to high ambient humidity, affecting the working efficiency of the fuel cell stack and reducing the accuracy of humidity control of the fuel cell.

[0034] Specifically, Figure 1 A schematic flow chart of a humidity control method for a fuel cell engine provided in an embodiment of the present application.

[0035] like Figure 1 As shown, the humidity control method of the fuel cell engine includes the following steps:

[0036] In step S101, the current stack operating power of the target fuel cell engine is acquired, and the current operating range of the stack is obtained based on the current stack operating power.

[0037] It can be understood that in the embodiments of the present application, the target fuel cell engine may be a proton exchange membrane fuel cell, and the current operating range of the stack, such as a low power zone, a medium power zone, and a high power zone, can be confirmed by setting one or more stack operating power thresholds and judging the numerical range of the current stack operating power.

[0038] In step S102, a target parameter set of the fuel cell stack is matched according to the current working range, and whether the current actual humidity of the fuel cell stack meets the preset environmental monitoring conditions is detected according to the target parameter set.

[0039] It should be noted that the preset environmental monitoring conditions can be set by those skilled in the art according to actual conditions and are not specifically limited here.

[0040] It can be understood that in the embodiments of the present application, when the preset environmental monitoring conditions are met, the current actual humidity of the fuel cell stack can be used to obtain the current ambient humidity for further humidity status judgment, and the target parameter set can be a pre-calibrated parameter set for determining the humidity status based on the different humidity control requirements of the high and low operating ranges of the stack.

[0041] Furthermore, if the current working range of the battery stack is the high-power range, the battery produces more water under high-power conditions and is more prone to flooding. Therefore, a more stringent humidity control strategy is required, thereby confirming the target parameter set for the high-power range; if the current working range of the battery stack is the low-power range, the battery produces less water under low-power conditions and the probability of flooding is low. Therefore, the humidity control strategy can be relatively loose, thereby confirming the target parameter set for the low-power range.

[0042] Optionally, in one embodiment of the present application, before detecting whether the current actual humidity of the battery stack meets the preset environmental monitoring conditions according to the target parameter set, it also includes: obtaining the current target humidity of the battery stack under the current current, and calculating the current water accumulation threshold based on the first humidity coefficient of the target parameter set and the current target humidity; when the current actual humidity is greater than or equal to the current water accumulation threshold, determining that the target humidity control mode is a completely dry mode.

[0043] During the actual implementation process, the current target humidity may be the ideal humidity value that can ensure the optimal performance of the fuel cell stack under the current operating current. The current water accumulation threshold can be calculated by multiplying the first humidity coefficient and the current target humidity. The current actual humidity is greater than or equal to the current water accumulation threshold, which may indicate that there may be excessive moisture accumulation inside the stack and drying measures are needed. At this time, the target humidity control mode is determined to be a completely dry mode, and the moisture in the air is dried and filtered to the greatest extent.

[0044] The embodiment of the present application can obtain the current target humidity of the battery stack under the current current, calculate the current water accumulation threshold based on the first humidity coefficient of the target parameter set and the current target humidity, and determine that the target humidity control mode is the complete dry mode when the current actual humidity is greater than or equal to the current water accumulation threshold, so as to switch to the complete dry mode in time when the humidity of the battery stack is too high, so as to prevent performance degradation or even damage caused by excessive moisture inside the battery stack.

[0045] Optionally, in one embodiment of the present application, whether the current actual humidity of the fuel cell stack meets the preset environmental monitoring conditions is detected according to the target parameter set, including: when the current actual humidity is less than the current water accumulation threshold, calculating the current safety threshold based on the second humidity coefficient of the target parameter set and the current target humidity, wherein the second humidity coefficient is less than the first humidity coefficient; judging whether the current actual humidity is greater than or equal to the current safety threshold; if the current actual humidity is greater than or equal to the current safety threshold, determining that the current actual humidity meets the preset environmental monitoring conditions, otherwise, determining that the target humidity control mode is the stop drying mode.

[0046] During the actual execution process, the current safety threshold can be calculated by multiplying the second humidity coefficient and the current target humidity, and is used to determine whether the actual humidity is within the safe working range. If the current actual humidity is less than the current safety threshold, the target humidity control mode is determined to be the stop drying mode, and the drying measures for the moisture in the air are stopped. If the current actual humidity is greater than or equal to the current safety threshold, the battery humidity control is further performed based on the current ambient humidity data.

[0047] In the embodiment of the present application, when the current actual humidity is less than the current water accumulation threshold, the current safety threshold can be calculated based on the second humidity coefficient of the target parameter set and the current target humidity. If the current actual humidity is greater than or equal to the current safety threshold, it is determined that the current actual humidity meets the preset environmental monitoring conditions. Otherwise, the target humidity control mode is determined to be the stop drying mode to ensure that the drying measures are stopped in time, thereby reducing cost consumption and more accurately controlling the humidity of the fuel cell stack.

[0048] In step S103, when the current actual humidity meets the preset environmental monitoring conditions, the target humidity control mode of the fuel cell stack is confirmed based on the current ambient humidity and the target parameter set of the target fuel cell engine, at least one humidity control action is generated based on the target humidity control mode, and the target fuel cell engine is controlled to perform at least one humidity control action until the fuel cell stack exits the target humidity control mode.

[0049] It is understood that in the embodiment of the present application, the target humidity control mode may be a drying process for different degrees of moisture in the air, for example, the position where the air enters the drying layer may be controlled by different valves of the air supply system; the humidity control action may be a specific operation taken to achieve the target humidity control mode, such as adjusting the valve switch, changing the cooling water flow rate, adjusting the stack temperature, etc. The target fuel cell engine is controlled to execute the generated humidity control action to adjust the stack humidity, and the stack humidity is re-detected after a preset time interval, and the humidity control mode is exited when the actual humidity is stable within the range of the desired humidity control mode.

[0050] Optionally, in one embodiment of the present application, the target humidity control mode of the fuel cell stack is confirmed based on the current ambient humidity and the target parameter set of the target fuel cell engine, including: obtaining a first ambient humidity threshold of the target parameter set, and determining whether the current ambient humidity is greater than or equal to the first ambient humidity threshold; if the current ambient humidity is greater than or equal to the first ambient humidity threshold, determining that the target humidity control mode is a completely dry mode, otherwise, confirming the target humidity control mode based on the second ambient humidity threshold of the target parameter set.

[0051] In the actual execution process, the current ambient humidity can be the humidity value in the environment where the fuel cell engine is currently located, which can be monitored by a humidity sensor. When the current ambient humidity is greater than or equal to the first ambient humidity threshold, it means that the stack needs to take corresponding measures to reduce the humidity in the stack. At this time, the target humidity control mode is determined to be a complete dry mode, and the moisture in the air is dried and filtered to the greatest extent. When the current ambient humidity is less than the first ambient humidity threshold, it is necessary to further confirm the target humidity control mode based on the second ambient humidity threshold of the target parameter set.

[0052] The embodiment of the present application can obtain the first ambient humidity threshold of the target parameter set. If the current ambient humidity is greater than or equal to the first ambient humidity threshold, the target humidity control mode is determined to be the completely dry mode. Otherwise, the target humidity control mode is confirmed based on the second ambient humidity threshold of the target parameter set. By setting different ambient humidity thresholds, hierarchical management of humidity control is achieved, thereby improving the flexibility and accuracy of humidity control.

[0053] Optionally, in one embodiment of the present application, the target humidity control mode is confirmed based on the second ambient humidity threshold of the target parameter set, including: determining whether the current ambient humidity is greater than or equal to the second ambient humidity threshold, wherein the second ambient humidity threshold is less than the first ambient humidity threshold; if the current ambient humidity is greater than or equal to the second ambient humidity threshold, then determining that the target humidity control mode is a partial drying mode, otherwise, determining that the target humidity control mode is a stop drying mode.

[0054] During the actual implementation process, the partial drying mode may be a drying measure taken when the ambient humidity is greater than or equal to the second ambient humidity threshold and less than the first ambient humidity threshold, and its drying intensity is lower than the drying intensity of the complete drying mode; if the current ambient humidity is less than the second ambient humidity threshold, the target humidity control mode is determined to be the stop drying mode, and the drying measures for the air moisture are stopped.

[0055] The embodiment of the present application can determine that the target humidity control mode is a partial drying mode when the current ambient humidity is greater than or equal to a second ambient humidity threshold value, otherwise, determine that the target humidity control mode is a stop drying mode, thereby automatically adjusting the humidity control strategy according to different ambient humidity conditions and being able to adapt to different working environments.

[0056] The working content of the embodiment of the present application is described in detail below with a specific embodiment. Figure 2 As shown, it is a structural schematic diagram of the humidity management system of a fuel cell engine according to an embodiment of the present application. The humidity management system of the fuel cell engine includes an air supply subsystem and a thermal management subsystem. The air supply subsystem includes an air filter, a flow meter, an air compressor, an intercooler, a humidifier, a flow valve 1, a flow valve 2, a flow valve 3, an electronic throttle, a hydrogen dilution device, and a humidity sensor; the thermal management subsystem includes a water pump, a radiator, and a three-way valve.

[0057] Among them, the air filter is used to filter physical and chemical impurities in the air, and can selectively filter moisture in the air. The flow meter is used to measure the air flow. The air compressor is used to pressurize the air. The intercooler is used to cool the pressurized high-temperature air. The humidifier humidifies the air entering the pile. Flow valve 1, flow valve 2, and flow valve 3 are used to control the opening and closing of air outlets 1, 2, and 3 of the air filter. When flow valve 1 is opened, the air leaves the air filter from air outlet 1 without passing through the drying layer; when flow valve 2 is opened, the air leaves the air filter from air outlet 2 and passes through all drying layers; when flow valve 3 is opened, the air leaves the air filter from air outlet 3 and passes through some drying layers. The humidity of the pile is controlled by opening and closing flow valves 1, 2, and 3.

[0058] The temperature sensor in the thermal management subsystem is used to measure the temperature of the stack coolant inlet, and the radiator is used to dissipate heat to the stack and intercooler. The water pump keeps the coolant running, and the three-way valve regulates the coolant flow through the intercooler and the stack.

[0059] Specifically, Figure 3 As shown, it is a schematic diagram of the structure of an air filter with an integrated drying layer of an embodiment of the present application. On the basis of realizing physical filtration and chemical filtration, a water-absorbent substance is added to the filter element to remove moisture from the air entering the air filter. It has a high degree of integration and does not increase additional volume, thereby realizing humidity control of the fuel cell engine conveniently and efficiently.

[0060] Further, Figure 4 This is a schematic diagram of the humidity control logic of a fuel cell engine according to an embodiment of the present application. First, the current stack operating power P is obtained. 电 、Current I 电 , target humidity H at current 电, and the actual humidity H0 of the current battery stack, and then judge P 电 ≥P0, if yes, the stack is working in the high-power area, where more water is produced and flooding is more likely to occur. Humidity control is more stringent, and it is necessary to determine the current humidity of the stack and the target humidity. P0 is the judgment threshold for the stack to work in the high-power area.

[0061] When the battery stack works in the high power range, when H0≥M1×H 电 There is a lot of water inside the stack, and it is determined that there is water flooding. At this time, open flow valve 2, close flow valves 1 and 3, and the air entering the stack passes through all the drying layers. Continue to work for T seconds and continue to obtain the current stack working power P 电 、Current I 电 , target humidity H at current 电 , and the current actual humidity H0 of the fuel cell stack, to achieve real-time control of the humidity of the fuel cell stack.

[0062] If H0<M1×H 电 , and H0≥M2×H 电 At this time, the risk of flooding of the fuel cell stack is high, and additional monitoring of the ambient humidity is required. The humidity sensor obtains the ambient humidity H1. If H1≥A1, flow valve 2 is opened, flow valves 1 and 3 are closed, and the high-humidity air entering the stack is dried through all drying layers (complete drying mode); if H1<A1 and H1≥A2, flow valve 3 is opened, flow valves 1 and 2 are closed, and the high-humidity air entering the stack is dried through part of the drying layers (partial drying mode); if H1<A2, flow valve 1 is opened, flow valves 2 and 3 are closed, and the air entering the stack does not pass through the drying layer for drying (stop drying mode); if H0<M2×H 电 , it is determined that there is no risk of flooding in the current stack, flow valve 1 is opened, flow valves 2 and 3 are closed, and the air entering the stack does not pass through the drying layer. At this time, the first humidity coefficient is M1, the second humidity coefficient is M2, the first environmental humidity threshold is A1, the second environmental humidity threshold is A2, M1>M2, A1>A2.

[0063] If P electric < P0, the stack is working in a low power range. The low power area produces less water and is not prone to flooding. The humidity control is relatively loose. Determine the current humidity of the stack and the target humidity. When H0 ≥ N1 × H 电 There is a lot of water inside the stack, and it is determined that there is water flooding. At this time, open flow valve 2, close flow valves 1 and 3, and the air entering the stack passes through all the drying layers. Continue to work for T seconds and continue to obtain the current stack working power P 电 、Current I 电 , target humidity H at current 电 , and the current actual humidity H0 of the fuel cell stack, to achieve real-time control of the humidity of the fuel cell stack.

[0064] If H0<N1×H 电, and H0≥N2×H 电 At this time, the risk of flooding of the fuel cell stack is high, and additional monitoring of the ambient humidity is required. The humidity sensor obtains the ambient humidity H1. If H1≥B1, flow valve 2 is opened, flow valves 1 and 3 are closed, and the high-humidity air entering the stack is dried through all the drying layers; if H1<B1 and H1≥B2, then flow valve 3 is opened, flow valves 1 and 2 are closed, and the high-humidity air entering the stack is dried through some drying layers; if H1<B2, flow valve 1 is opened, flow valves 2 and 3 are closed, and the air entering the stack is not dried through the drying layer; if H0<N2×H 电 , it is determined that there is no risk of flooding in the current fuel cell stack, flow valve 1 is opened, flow valves 2 and 3 are closed, and the air entering the stack does not pass through the drying layer. At this time, the first humidity coefficient is N1, the second humidity coefficient is N2, the first environmental humidity threshold is B1, the second environmental humidity threshold is B2, N1>N2, B1>B2.

[0065] Among them, according to the rules of common battery stacks, N1>N2; B1>B2; M1≤N1, M2≤N2, A1≤B1, A2≤B2, different values ​​can be set for different battery stacks, and the size can also be adjusted according to different battery stacks. By real-time monitoring of the current battery stack humidity and the target battery stack humidity, combined with the environmental humidity factor, the amount of air entering the air filter drying layer is continuously adjusted to achieve accurate and effective control of the fuel cell humidity, reduce the dehumidification valve and dehumidification pipeline, increase the integration of the whole machine, and reduce the cost of the whole machine.

[0066] According to the humidity control method of the fuel cell engine proposed in the embodiment of the present application, the corresponding humidity evaluation parameters can be confirmed based on the different powers of the fuel cell engine, and the humidity state of the stack can be determined in combination with the stack humidity and the ambient humidity, so as to confirm the humidity control mode and perform the corresponding drying treatment, thereby realizing the precise control of the humidity of the fuel cell, ensuring the stability and safety of the operation of the fuel cell, and being more practical. Thus, the problem in the related art that adding a bypass line and a bypass valve to the air system of the proton exchange membrane fuel cell may cause pipeline pressure fluctuations, increase the difficulty of humidity control, lead to the expansion of the whole machine volume, increase the cost, and cannot adjust the ambient humidity, making it difficult to deal with the flooding of the stack due to high ambient humidity, affecting the working efficiency of the stack, and reducing the accuracy of the humidity control of the fuel cell.

[0067] Next, the humidity control device for a fuel cell engine according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0068] Figure 5 It is a schematic structural diagram of a humidity control device for a fuel cell engine according to an embodiment of the present application.

[0069] like Figure 5As shown, the humidity control device 10 of the fuel cell engine includes: an acquisition module 100 , a detection module 200 and a control module 300 .

[0070] The acquisition module 100 is used to acquire the current stack operating power of the target fuel cell engine, and obtain the current operating range of the stack based on the current stack operating power.

[0071] The detection module 200 is used to match the target parameter set of the battery stack according to the current working range, and detect whether the current actual humidity of the battery stack meets the preset environmental monitoring conditions according to the target parameter set.

[0072] The control module 300 is used to confirm the target humidity control mode of the fuel cell stack based on the current ambient humidity and the target parameter set of the target fuel cell engine when the current actual humidity meets the preset environmental monitoring conditions, generate at least one humidity control action based on the target humidity control mode, and control the target fuel cell engine to perform at least one humidity control action until the fuel cell stack exits the target humidity control mode.

[0073] Optionally, in one embodiment of the present application, the device 10 further includes: a calculation module and a determination module.

[0074] Among them, the calculation module is used to obtain the current target humidity of the battery stack under the current current before detecting whether the current actual humidity of the battery stack meets the preset environmental monitoring conditions according to the target parameter set, and calculate the current water accumulation threshold based on the first humidity coefficient of the target parameter set and the current target humidity.

[0075] The determination module is used to determine that the target humidity control mode is a completely dry mode when the current actual humidity is greater than or equal to the current water accumulation threshold.

[0076] Optionally, in one embodiment of the present application, the detection module 200 includes: a calculation unit, a first judgment unit and a first determination unit.

[0077] Among them, the calculation unit is used to calculate the current safety threshold based on the second humidity coefficient of the target parameter set and the current target humidity when the current actual humidity is less than the current water accumulation threshold, wherein the second humidity coefficient is less than the first humidity coefficient.

[0078] The first judgment unit is used to judge whether the current actual humidity is greater than or equal to the current safety threshold.

[0079] The first determination unit is used to determine that the current actual humidity meets the preset environmental monitoring condition when the current actual humidity is greater than or equal to the current safety threshold, otherwise, determine that the target humidity control mode is the stop drying mode.

[0080] Optionally, in one embodiment of the present application, the control module 300 includes: a second judging unit and a second determining unit.

[0081] The second judgment unit is used to obtain a first environmental humidity threshold value of the target parameter set, and judge whether the current environmental humidity is greater than or equal to the first environmental humidity threshold value.

[0082] The second determination unit is used to determine that the target humidity control mode is the complete drying mode when the current ambient humidity is greater than or equal to the first ambient humidity threshold, otherwise, confirm the target humidity control mode based on the second ambient humidity threshold of the target parameter set.

[0083] Optionally, in one embodiment of the present application, the second determination unit is specifically used to: determine whether the current ambient humidity is greater than or equal to a second ambient humidity threshold, wherein the second ambient humidity threshold is less than the first ambient humidity threshold; when the current ambient humidity is greater than or equal to the second ambient humidity threshold, determine that the target humidity control mode is a partial drying mode, otherwise, determine that the target humidity control mode is a stop drying mode.

[0084] It should be noted that the above explanation of the embodiment of the humidity control method for a fuel cell engine is also applicable to the humidity control device for the fuel cell engine of this embodiment, and will not be repeated here.

[0085] According to the humidity control device of the fuel cell engine proposed in the embodiment of the present application, the corresponding humidity evaluation parameters are confirmed based on the different powers of the fuel cell engine, and the humidity state of the stack is determined in combination with the stack humidity and the ambient humidity, so as to confirm the humidity control mode and perform the corresponding drying treatment, thereby realizing the precise control of the humidity of the fuel cell, ensuring the stability and safety of the operation of the fuel cell, and being more practical. Thus, the problem in the related art that adding a bypass line and a bypass valve to the air system of the proton exchange membrane fuel cell may cause pipeline pressure fluctuations, increase the difficulty of humidity control, lead to the expansion of the whole machine volume, increase the cost, and cannot adjust the ambient humidity, making it difficult to deal with the flooding of the stack due to high ambient humidity, affecting the working efficiency of the stack, and reducing the accuracy of the humidity control of the fuel cell.

[0086] Figure 6 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle may include:

[0087] A memory 601 , a processor 602 , and a computer program stored in the memory 601 and executable on the processor 602 .

[0088] When the processor 602 executes the program, the humidity control method for the fuel cell engine provided in the above embodiment is implemented.

[0089] Furthermore, the vehicle also includes:

[0090] The communication interface 603 is used for communication between the memory 601 and the processor 602 .

[0091] The memory 601 is used to store computer programs that can be executed on the processor 602 .

[0092] The memory 601 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0093] If the memory 601, the processor 602 and the communication interface 603 are implemented independently, the communication interface 603, the memory 601 and the processor 602 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 6 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0094] Optionally, in a specific implementation, if the memory 601, the processor 602 and the communication interface 603 are integrated on a chip, the memory 601, the processor 602 and the communication interface 603 can communicate with each other through an internal interface.

[0095] The processor 602 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0096] This embodiment also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the humidity control method of the fuel cell engine as described above is implemented.

[0097] This embodiment also provides a computer program, which implements the above-mentioned humidity control method for a fuel cell engine when the computer program is executed.

[0098] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0099] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0100] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0101] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways as necessary and then storing it in a computer memory.

[0102] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0103] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0104] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0105] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for controlling humidity of a fuel cell engine, It is characterized in that The following steps are involved: Acquire the current stack operating power of the target fuel cell engine, and obtain the current operating range of the stack based on the current stack operating power; Matching a target parameter set of the fuel cell stack according to the current working range, and detecting whether the current actual humidity of the fuel cell stack meets a preset environmental monitoring condition according to the target parameter set; When the current actual humidity meets the preset environmental monitoring conditions, the target humidity control mode of the fuel cell stack is confirmed based on the current ambient humidity of the target fuel cell engine and the target parameter set, at least one humidity control action is generated based on the target humidity control mode, and the target fuel cell engine is controlled to perform the at least one humidity control action until the fuel cell stack exits the target humidity control mode.

2. The method according to claim 1, It is characterized in that Before detecting whether the current actual humidity of the fuel cell stack meets the preset environmental monitoring condition according to the target parameter set, the method further includes: Acquire a current target humidity of the battery stack at a current current, and calculate a current water accumulation threshold based on a first humidity coefficient of the target parameter set and the current target humidity; When the current actual humidity is greater than or equal to the current water accumulation threshold, it is determined that the target humidity control mode is a complete dry mode.

3. The method according to claim 2, It is characterized in that The detecting, according to the target parameter set, whether the current actual humidity of the fuel cell stack meets a preset environmental monitoring condition includes: When the current actual humidity is less than the current water accumulation threshold, calculating a current safety threshold based on a second humidity coefficient of the target parameter set and the current target humidity, wherein the second humidity coefficient is less than the first humidity coefficient; Determining whether the current actual humidity is greater than or equal to the current safety threshold; If the current actual humidity is greater than or equal to the current safety threshold, it is determined that the current actual humidity meets the preset environmental monitoring condition; otherwise, it is determined that the target humidity control mode is the stop drying mode.

4. The method according to claim 1, It is characterized in that The step of confirming the target humidity control mode of the fuel cell stack based on the current ambient humidity of the target fuel cell engine and the target parameter set includes: Obtaining a first ambient humidity threshold of the target parameter set, and determining whether the current ambient humidity is greater than or equal to the first ambient humidity threshold; If the current ambient humidity is greater than or equal to the first ambient humidity threshold, the target humidity control mode is determined to be the complete dry mode; otherwise, the target humidity control mode is confirmed based on the second ambient humidity threshold of the target parameter set.

5. The method according to claim 4, It is characterized in that The step of confirming the target humidity control mode based on the second environmental humidity threshold of the target parameter set includes: Determining whether the current ambient humidity is greater than or equal to the second ambient humidity threshold, wherein the second ambient humidity threshold is less than the first ambient humidity threshold; If the current ambient humidity is greater than or equal to the second ambient humidity threshold, the target humidity control mode is determined to be a partial drying mode; otherwise, the target humidity control mode is determined to be a stop drying mode.

6. A humidity control device for a fuel cell engine, It is characterized in that include: An acquisition module, used to acquire the current stack operating power of the target fuel cell engine, and obtain the current operating range of the stack based on the current stack operating power; A detection module, used to match a target parameter set of the battery stack according to the current working range, and detect whether the current actual humidity of the battery stack meets a preset environmental monitoring condition according to the target parameter set; A control module is used to confirm the target humidity control mode of the fuel cell stack based on the current ambient humidity of the target fuel cell engine and the target parameter set when the current actual humidity meets the preset environmental monitoring conditions, generate at least one humidity control action based on the target humidity control mode, and control the target fuel cell engine to perform the at least one humidity control action until the fuel cell stack exits the target humidity control mode.

7. The device according to claim 6, It is characterized in that Also includes: a calculation module, configured to obtain a current target humidity of the battery stack at a current current before detecting whether the current actual humidity of the battery stack meets a preset environmental monitoring condition according to the target parameter set, and calculate a current water accumulation threshold value based on a first humidity coefficient of the target parameter set and the current target humidity; The determination module is used to determine that the target humidity control mode is a completely dry mode when the current actual humidity is greater than or equal to the current water accumulation threshold.

8. The device according to claim 7, It is characterized in that The detection module comprises: a calculation unit, configured to calculate a current safety threshold based on a second humidity coefficient of the target parameter set and the current target humidity when the current actual humidity is less than the current water accumulation threshold, wherein the second humidity coefficient is less than the first humidity coefficient; A judging unit, used to judge whether the current actual humidity is greater than or equal to the current safety threshold; A determination unit is used to determine that the current actual humidity meets the preset environmental monitoring condition when the current actual humidity is greater than or equal to the current safety threshold; otherwise, determine that the target humidity control mode is a stop drying mode.

9. A vehicle, It is characterized in that include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the humidity control method for a fuel cell engine as claimed in any one of claims 1 to 5.

10. A computer-readable storage medium having a computer program stored thereon, It is characterized in that The program is executed by a processor to implement the humidity control method for a fuel cell engine as described in any one of claims 1 to 5.

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