Humidity control method and device, electronic equipment, storage medium and product

Abstract

The invention discloses a humidity control method and device, electronic equipment, a storage medium and a product, and relates to the technical field of control. The humidity control method comprises the following steps: acquiring the current operation humidity and working operation parameters of a fuel cell stack; determining an abnormal threshold value of the fuel cell stack according to the working operation parameters; determining the abnormal state of the fuel cell stack according to the current operation humidity, the working operation parameters and the abnormal threshold; and determining a humidity control rule according to the abnormal state, and controlling the working state of the target equipment according to the humidity control rule so as to control the operation humidity of the fuel cell stack. According to the embodiment of the invention, the abnormal state of the fuel cell stack is determined through the current operation humidity, the working operation parameters and the abnormal threshold, the accuracy of determining the abnormal state is improved, and the risk of misjudgment is reduced; meanwhile, the corresponding humidity control rule is determined through the abnormal state, so that the timeliness of operation humidity adjustment is improved, and the operation stability of the fuel cell stack is improved.

Description

Technical Field

[0001] The present invention relates to the field of control technology, and in particular to a humidity control method, device, electronic equipment, storage medium and product. Background Art

[0002] Proton exchange membrane fuel cells are devices that convert chemical energy into electrical energy. They mainly include fuel cell stacks, fuel supply systems, air supply systems, water and heat management, and electronic control units.

[0003] Proton exchange membrane fuel cells require humidified high-purity hydrogen to be introduced into the anode, and humidified air or oxygen to be introduced into the cathode. High-purity hydrogen generates hydrogen ions and electrons under the action of the anode catalyst layer. The hydrogen ions generated at the anode will reach the cathode through the proton exchange membrane in the form of hydronium ions. Oxygen combines with hydronium ions under the action of the cathode catalyst to generate water and release heat. Electrons flow from the anode to the cathode from the external circuit to generate current. However, the proton exchange membrane requires a certain humidity to ensure efficient conduction of protons. When the humidity is low, the proton exchange membrane will become dry and the proton conductivity will decrease, resulting in an increase in the internal resistance of the battery and a decrease in the output voltage and power. Excessive humidity may cause water flooding of the membrane electrode assembly, hinder gas diffusion, and also reduce battery performance and low operating stability. Therefore, how to accurately and timely control the operating humidity of the fuel cell stack has become a problem that needs to be solved urgently. Summary of the invention

[0004] The present invention provides a humidity control method, device, electronic device, storage medium and product to solve the problem in the prior art that the operating humidity of a fuel cell stack cannot be accurately and timely controlled.

[0005] According to one aspect of the present invention, a humidity control method is provided, wherein the method comprises:

[0006] Obtain the current operating humidity and working parameters of the fuel cell stack;

[0007] Determining an abnormal threshold of the fuel cell stack according to the operating parameters;

[0008] Determining an abnormal state of the fuel cell stack according to the current operating humidity, the working operating parameter and the abnormal threshold;

[0009] A humidity control rule is determined according to the abnormal state, and the working state of the target device is controlled according to the humidity control rule to control the operating humidity of the fuel cell stack.

[0010] According to another aspect of the present invention, there is provided a humidity control device, wherein the device comprises:

[0011] A data acquisition module, used to obtain the current operating humidity and working parameters of the fuel cell stack;

[0012] A threshold determination module, used to determine an abnormal threshold of the fuel cell stack according to the operating parameters;

[0013] A state determination module, used to determine the abnormal state of the fuel cell stack according to the current operating humidity, the working operating parameters and the abnormal threshold;

[0014] The humidity control module is used to determine a humidity control rule according to the abnormal state, and control the working state of the target device according to the humidity control rule to control the operating humidity of the fuel cell stack.

[0015] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0016] at least one processor; and

[0017] a memory communicatively connected to the at least one processor; wherein,

[0018] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the humidity control method described in any embodiment of the present invention.

[0019] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the humidity control method described in any embodiment of the present invention when executed.

[0020] According to another aspect of the present invention, an embodiment of the present invention further provides a computer program product, the computer program product includes a computer program, and when the computer program is executed by a processor, the humidity control method of any embodiment of the present invention is implemented.

[0021] The technical solution of the embodiment of the present invention obtains the current operating humidity and working parameters of the fuel cell stack, determines the abnormal threshold of the fuel cell stack according to the working parameters, determines the abnormal state of the fuel cell stack according to the current operating humidity, working parameters and the abnormal threshold, improves the accuracy of abnormal state determination, reduces the risk of misjudgment, determines humidity control rules according to the abnormal state, and controls the working state of the target device according to the humidity control rules to control the operating humidity of the fuel cell stack, determines the corresponding humidity control rules according to the abnormal state, improves the timeliness of operating humidity adjustment, and enhances the stability of fuel cell stack operation.

[0022] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a flow chart of a humidity control method provided according to Embodiment 1 of the present invention;

[0025] Figure 2 is a flow chart of a humidity control method provided according to Embodiment 2 of the present invention;

[0026] Figure 3 is a structural schematic diagram of a humidity control system provided according to Embodiment 3 of the present invention;

[0027] Figure 4 is a structural schematic diagram of a humidity control device provided according to Embodiment 4 of the present invention;

[0028] Figure 5 It is a structural schematic diagram of an electronic device for implementing the humidity control method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] Embodiment 1

[0032] Figure 1 This is a flow chart of a humidity control method provided according to the first embodiment of the present invention. This embodiment is applicable to the case of controlling the operating humidity of a fuel cell stack for a vehicle. The method can be executed by a humidity control device, which can be implemented in the form of hardware and / or software, and can be configured in an electronic device. Figure 1 As shown, the method includes:

[0033] S110, obtaining the current operating humidity and working parameters of the fuel cell stack.

[0034] Among them, the fuel cell stack refers to a power generation device composed of a single chip of a proton exchange membrane fuel cell stack. Generally speaking, the fuel cell stack is composed of a plurality of single cells stacked in series, and the electrochemical reactions of the plurality of single cells are superimposed to generate electricity together. The current operating humidity can be understood as the relative humidity of the internal environment of the fuel cell stack during operation at the current moment. In practical applications, the humidity of the fuel cell stack out of the stack can be collected as the current operating humidity. The operating parameters can be understood as the parameters generated by the fuel cell stack during operation or changed due to the operation of the fuel cell stack. Exemplarily, the operating parameters may include but are not limited to the stack output current, the coolant temperature out of the stack, and the single cell voltage.

[0035] In an embodiment, the stack humidity can be obtained by a pre-set stack humidity sensor, and the stack humidity is collected as the current operating humidity. In the actual operation process, the stack humidity sensor can be installed at the cathode outlet of the fuel cell stack. Then obtain parameter information such as the stack output current, the stack coolant temperature, and the single cell voltage, and use the stack output current, the stack coolant temperature, and the single cell voltage as the working operation parameters. In the actual operation process, a single cell voltage monitoring controller (Cell Voltage Monitor Controller, CVM), a voltage sensor, a water temperature sensor, a temperature sensor, and a current sensor and other devices can be pre-set, and the single cell voltage is collected by the single cell voltage monitoring controller or the voltage sensor, and the stack coolant temperature is collected by the water temperature sensor or the temperature sensor, and the stack output current is collected by the current sensor, and the single cell voltage, the stack coolant temperature, and the stack output current collected by each sensor are obtained, and the single cell voltage, the stack coolant temperature, and the stack output current are used as the working operation parameters.

[0036] S120, determining an abnormal threshold of the fuel cell stack according to the operating parameters.

[0037] The abnormal threshold can be understood as a critical value for judging the abnormal state of the fuel cell stack. Generally speaking, the abnormality of the fuel cell stack is mainly affected by humidity and voltage, and the abnormal threshold can include a humidity abnormal threshold and a voltage abnormal threshold.

[0038] In an embodiment, the abnormal threshold can be confirmed by looking up a table. A preset humidity mapping table and a preset voltage mapping table can be pre-set, and the abnormal threshold of the fuel cell stack can be determined according to the working parameters, the preset humidity mapping table and the preset voltage mapping table. The humidity abnormal threshold can be determined by the preset humidity mapping table, and the voltage abnormal threshold can be determined by the preset voltage mapping table. In the actual operation process, in the preset humidity mapping table, the humidity abnormal threshold can be related to the stack output current and the stack coolant temperature, and the corresponding humidity threshold can be found in the preset humidity mapping table according to the stack output current and the stack coolant temperature in the working parameters as the humidity abnormal threshold. Among them, the humidity threshold can include a maximum humidity threshold and a minimum humidity threshold. In general, the voltage abnormality is related to the single cell voltage, and the voltage abnormality threshold can include a single cell voltage difference threshold and an average single cell voltage threshold. In the preset voltage mapping table, the voltage abnormality threshold can be related to the stack output current, and the single cell voltage difference threshold and the average single cell voltage threshold can be found in the voltage abnormality threshold by the stack output current as the voltage abnormality threshold.

[0039] S130, determining the abnormal state of the fuel cell stack according to the current operating humidity, working parameters and abnormal thresholds.

[0040] The abnormal state may be understood as an abnormality in the operation of the fuel cell stack. In one embodiment, the abnormal state may include an over-humid state of the fuel cell stack, an over-dry state of the fuel cell stack, and a non-abnormal state.

[0041] In an embodiment, the abnormality of the stack voltage and the humidity of the stack can be judged first, and then the abnormal state of the fuel cell stack can be determined according to the abnormality of the stack voltage and the humidity of the stack. In practical applications, the maximum value and the minimum value of the single cell voltage in the working operation parameters can be determined, and the difference between the maximum value and the minimum value can be used as the voltage difference, and the average value of each single cell voltage can be used as the voltage average value. The stack voltage of the fuel cell stack is determined by the voltage difference, the voltage average value, the single cell voltage difference threshold in the abnormal threshold, and the average single cell voltage threshold in the abnormal threshold. The stack humidity of the fuel cell stack is determined by the current operating humidity, the maximum humidity threshold in the abnormal threshold, and the minimum humidity threshold in the abnormal threshold. In the actual operation process, it can be determined that the voltage difference is less than the single cell voltage difference threshold, and the voltage average is greater than the average single cell voltage threshold. The stack voltage of the fuel cell stack is normal, otherwise it is judged that the stack voltage is abnormal. And when the current operating humidity is greater than the maximum humidity threshold, it is determined that the fuel cell stack is over-humid; when the current operating humidity is less than the minimum humidity threshold in the abnormal threshold, it is determined that the fuel cell stack is over-dry, otherwise it is determined that the fuel cell stack is normal in humidity. Generally speaking, there may be a hysteresis in the state change of the fuel cell stack, and a preset extension time can be set. When judging the abnormality of the stack voltage and the humidity of the stack, it is determined whether the preset extension time is abnormal. If not, it is judged to be normal. After judging the abnormality of the stack voltage and the humidity of the stack, when the humidity of the stack is over-humidity and the stack voltage is abnormal, it is determined that the abnormal state of the fuel cell stack is the stack over-humidity state; when the humidity of the stack is over-dry and the stack voltage is abnormal, it is determined that the abnormal state of the fuel cell stack is the stack over-dry state; when the humidity of the stack is normal, or the stack voltage is normal, it is determined that the abnormal state of the fuel cell stack is no abnormal state.

[0042] S140, determining a humidity control rule according to the abnormal state, and controlling the working state of the target device according to the humidity control rule to control the operating humidity of the fuel cell stack.

[0043] Among them, the humidity control rule can be pre-set and used to adjust the operating humidity of the fuel cell stack. In the actual operation process, the humidity control rule and the abnormal state can be one-to-one corresponding, and the corresponding humidity control rule can be determined according to the abnormal state. The target device can be understood as a device that controls the operating humidity of the fuel cell stack. For example, the target device can include but is not limited to a thermostat, a radiator fan, a humidifier bypass valve, an air compressor, and an air pressure regulating valve. Among them, the thermostat is used to control the amount of coolant entering the radiator; the radiator is used to dissipate the heat of the coolant to reduce the temperature of the coolant and adjust the humidity abnormality threshold; the air compressor is used to provide dry air for the humidifier; the air pressure regulating valve is used to adjust the air pressure of the fuel cell stack to control the amount of humid air output by the fuel cell stack; the humidifier bypass valve is used to adjust the amount of humid air output by the fuel cell stack entering the humidifier, so that the humidifier mixes the humid air output by the fuel cell stack with the dry air provided by the air compressor to adjust the humidity of the gas input to the fuel cell stack.

[0044] In an embodiment, when it is determined that the abnormal state of the fuel cell stack is an over-dry state of the stack, the operating humidity of the fuel cell stack can be increased. For example, the humidity control rule can be to increase the opening of the thermostat of a preset first ratio, increase the fan speed of the radiator of a preset first size, reduce the opening of the humidifier bypass valve of a preset second ratio, reduce the speed of the air compressor of a preset second size, and reduce the opening of the air pressure regulating valve of a preset third ratio. When it is determined that the abnormal state of the fuel cell stack is an over-humid state of the stack, the operating humidity of the fuel cell stack can be reduced. For example, the humidity control rule can be to reduce the opening of the thermostat of a preset first ratio, increase the fan speed of the radiator of a preset first size, increase the opening of the humidifier bypass valve of a preset second ratio, increase the speed of the air compressor of a preset second size, and increase the rated opening of the air pressure regulating valve of a preset third ratio. When it is determined that the abnormal state of the fuel cell stack is not abnormal, there may be a deviation between the current operating humidity and the preset humidity. The difference between the current operating humidity and the preset humidity can be determined as a humidity deviation value, and the humidity deviation value is input into the preset deviation determination controller to determine the humidifier bypass valve opening threshold, and the humidifier bypass valve opening threshold is adjusted to adjust the amount of humid air output by the fuel cell stack entering the humidifier, and adjust the operating humidity of the fuel cell stack. After the humidity control rule is determined, the working state of the target device can be controlled according to the humidity control rule to control the operating humidity of the fuel cell stack.

[0045] The embodiments of the present invention obtain the current operating humidity and working parameters of the fuel cell stack, determine the abnormal threshold of the fuel cell stack according to the working parameters, determine the abnormal state of the fuel cell stack according to the current operating humidity, working parameters and the abnormal threshold, improve the accuracy of abnormal state determination, reduce the risk of misjudgment, determine the humidity control rule according to the abnormal state, and control the working state of the target device according to the humidity control rule to control the operating humidity of the fuel cell stack, determine the corresponding humidity control rule according to the abnormal state, improve the timeliness of operating humidity adjustment, and enhance the stability of fuel cell stack operation.

[0046] In one embodiment, after determining the humidity control rule according to the abnormal state and controlling the working state of the target device according to the humidity control rule, the method further includes:

[0047] Determine the current operating humidity and the working operating parameters after adjusting the working state of the target device as the adjusted operating humidity and the adjusted working operating parameters;

[0048] The abnormal state of the adjusted fuel cell stack is determined based on the adjusted operating humidity and the adjusted working operating parameters, and the working state of the target device is controlled according to the humidity control rule corresponding to the abnormal state of the adjusted fuel cell stack.

[0049] In an embodiment, after the working state of the target device is controlled according to the humidity control rule, the adjusted current operating humidity and the working operating parameters can be detected again as the adjusted operating humidity and the adjusted working operating parameters. The abnormal state of the fuel cell stack is determined again according to the adjusted operating humidity and the adjusted working operating parameters, and the corresponding humidity control rule is extracted according to the abnormal state to control the working state of the target device, so as to ensure the real-time monitoring of the operating humidity of the fuel cell stack and ensure that the fuel cell stack is at an appropriate operating humidity in real time.

[0050] Embodiment 2

[0051] Figure 2 1 is a flow chart of a humidity control method provided according to Embodiment 2 of the present invention. This embodiment is further optimized and expanded based on the above embodiment and can be combined with various optional technical solutions in the above embodiment. Figure 2 As shown, the method includes:

[0052] S201, collecting the stack outlet humidity obtained by a preset stack outlet humidity sensor as the current operating humidity of the fuel cell stack.

[0053] The stack humidity sensor is a device used to monitor the humidity of the fuel cell stack when it is out of the stack. In actual operation, the stack humidity sensor can be installed at the cathode outlet of the fuel cell stack to monitor the stack humidity of the fuel cell stack in real time.

[0054] In an embodiment, the out-of-stack humidity collected by the pre-set out-of-stack humidity sensor can be used to obtain the out-of-stack humidity collected by the out-of-stack humidity sensor as the current operating humidity of the fuel cell stack. In actual operation, the out-of-stack humidity collected by the out-of-stack humidity sensor can be obtained at preset time intervals; or the out-of-stack humidity sensor can actively report the collected out-of-stack humidity.

[0055] S202, collecting the stack output current, the coolant temperature out of the stack, and the cell voltage of each cell of the fuel cell stack, and using the stack output current, the coolant temperature out of the stack, and the cell voltage as operating parameters.

[0056] Among them, the stack output current refers to the current output by the fuel cell stack; the out-of-stack coolant temperature refers to the temperature of the coolant output for cooling after the fuel cell stack passes through the fuel cell stack during the reaction process; the single cell voltage of a single cell can be understood as the voltage value of each single cell in the fuel cell stack.

[0057] In an embodiment, the stack output current and the cell voltage of each cell can be collected through a pre-set CVM controller, the stack coolant temperature can be collected through a stack temperature sensor, and the stack output current, stack coolant temperature and cell voltage can be used as working parameters.

[0058] S203, extracting a preset humidity mapping table, and searching the preset humidity mapping table for a humidity threshold as a humidity abnormality threshold according to the stack output current and the stack coolant temperature in the working operation parameters.

[0059] The humidity abnormality threshold includes a maximum humidity threshold and a minimum humidity threshold.

[0060] Among them, the maximum humidity threshold can be understood as a critical value for judging whether the fuel cell stack is over-humidified; the minimum humidity threshold can be understood as a critical value for judging whether the fuel cell stack is over-dry. The preset humidity mapping table refers to a mapping table that stores the preset relationship between the stack output current, the stack coolant temperature and the humidity threshold. In one embodiment, the preset humidity mapping table can be a three-dimensional table, in which the stack output current is the X-axis, the stack coolant temperature is the Y-axis, and the humidity threshold is the Z-axis.

[0061] In an embodiment, a pre-set preset humidity mapping table can be extracted, and the maximum humidity threshold and the minimum humidity threshold corresponding to the stack output current and the stack coolant temperature can be determined by table lookup, and the maximum humidity threshold and the minimum humidity threshold can be used as the humidity abnormality threshold.

[0062] S204, extracting a preset voltage mapping table, and searching the preset voltage mapping table for a single cell voltage difference threshold and an average single cell voltage threshold as a voltage abnormality threshold according to the stack output current in the working operation parameters.

[0063] The preset voltage mapping table refers to a mapping table that stores the preset association between the battery stack output current and the cell voltage difference threshold and the average cell voltage threshold. In one embodiment, the preset humidity mapping table can be a two-dimensional table, in which the battery stack output current is the X-axis, and the cell voltage difference threshold and the average cell voltage threshold are the Y-axis.

[0064] In an embodiment, a pre-set preset voltage mapping table can be extracted, and the single cell voltage difference threshold and the average single cell voltage threshold corresponding to the stack output current can be determined by table lookup, and the single cell voltage difference threshold and the average single cell voltage threshold can be used as voltage abnormality thresholds.

[0065] S205. Use the humidity abnormality threshold and the voltage abnormality threshold as the abnormality threshold of the fuel cell stack.

[0066] In an embodiment, after the humidity abnormality threshold and the voltage abnormality threshold are determined, the humidity abnormality threshold and the voltage abnormality threshold may be used as abnormality thresholds of the fuel cell stack.

[0067] S206, determining the maximum value and the minimum value of the single cell voltage in the operating parameters, taking the difference between the maximum value and the minimum value as the voltage difference, and taking the average value of each single cell voltage as the voltage average value.

[0068] In an embodiment, the single cell voltage in the operating parameters can be extracted, the maximum value and the minimum value of the single cell voltage can be determined, the difference between the maximum value and the minimum value can be determined as the voltage difference, and the average value of each single cell voltage can be determined as the voltage average value.

[0069] S207, determining the stack voltage of the fuel cell stack according to the voltage difference, the voltage average, the single cell voltage difference threshold in the abnormal threshold, and the average single cell voltage threshold in the abnormal threshold.

[0070] In an embodiment, after the voltage difference, voltage average, single cell voltage difference threshold and average single cell voltage threshold are determined, the stack voltage condition of the fuel cell stack can be determined according to the voltage difference, voltage average, single cell voltage difference threshold and average single cell voltage threshold.

[0071] In one embodiment, the voltage condition of the fuel cell stack is determined according to the voltage difference, the voltage average, the single cell voltage difference threshold in the abnormal threshold, and the average single cell voltage threshold in the abnormal threshold, including:

[0072] When it is determined within the preset extended time that the voltage difference is greater than or equal to the single cell voltage difference threshold in the abnormal threshold, and the voltage average is less than or equal to the average single cell voltage threshold in the abnormal threshold, it is determined that the stack voltage of the fuel cell stack is abnormal;

[0073] When it is determined that the voltage difference is less than the single cell voltage difference threshold value within the preset extended time, and the voltage average value is greater than the average single cell voltage threshold value, it is determined that the stack voltage of the fuel cell stack is normal.

[0074] Among them, the preset extension time refers to the pre-set detection time. Generally speaking, there may be a lag in the state change of the fuel cell stack. The preset extension time can be set. When judging the abnormal voltage of the stack and the humidity of the stack, it is determined whether the preset extension time is abnormal. If not, it is judged to be normal.

[0075] In an embodiment, when it is determined within a preset extended time that the voltage difference is greater than or equal to the cell voltage difference threshold in the abnormal threshold, and the voltage average value is less than or equal to the average cell voltage threshold in the abnormal threshold, it can be determined that the stack voltage of the fuel cell stack is abnormal, that is, at this time, the voltage difference is large, and the voltage average value is small. When it is determined within a preset extended time that the voltage difference is less than the cell voltage difference threshold, and the voltage average value is greater than the average cell voltage threshold, it can be determined that the stack voltage of the fuel cell stack is normal.

[0076] S208. Determine the humidity of the fuel cell stack according to the current operating humidity, the maximum humidity threshold in the abnormal thresholds, and the minimum humidity threshold in the abnormal thresholds.

[0077] In one embodiment, the humidity of the fuel cell stack is determined according to the current operating humidity, the maximum humidity threshold in the abnormal threshold, and the minimum humidity threshold in the abnormal threshold, including:

[0078] When it is determined that the current operating humidity is greater than the maximum humidity threshold in the abnormal threshold within the preset extended time, determining that the fuel cell stack is overhumidified;

[0079] When it is determined that the current operating humidity is less than the minimum humidity threshold in the abnormal threshold within the preset extended time, it is determined that the fuel cell stack is too dry;

[0080] When it is determined that the current operating humidity is greater than the minimum humidity threshold and less than the maximum humidity threshold within a preset extended time, it is determined that the stack humidity of the fuel cell stack is normal.

[0081] In an embodiment, after determining the current operating humidity, the maximum humidity threshold among the abnormal thresholds, and the minimum humidity threshold among the abnormal thresholds, the size relationship between the current operating humidity, the maximum humidity threshold, and the minimum humidity threshold can be compared. When it is determined that the current operating humidity is greater than the maximum humidity threshold among the abnormal thresholds within a preset extended time, it is determined that the fuel cell stack is overhumid; when it is determined that the current operating humidity is less than the minimum humidity threshold among the abnormal thresholds within a preset extended time, it is determined that the fuel cell stack is too dry; when it is determined that the current operating humidity is greater than the minimum humidity threshold and less than the maximum humidity threshold within the preset extended time, it is determined that the stack humidity of the fuel cell stack is normal.

[0082] S209. Determine the abnormal state of the fuel cell stack according to the voltage and humidity conditions of the fuel cell stack.

[0083] In an embodiment, after determining the voltage and humidity of the fuel cell stack, the abnormal state of the fuel cell stack can be determined according to the voltage and humidity of the fuel cell stack. Exemplarily, the abnormal state can include an over-humidity state, an over-dry state, and a non-abnormal state.

[0084] In one embodiment, determining the abnormal state of the fuel cell stack according to the voltage and humidity of the fuel cell stack includes:

[0085] When it is determined that the humidity condition of the fuel cell stack is that the fuel cell stack is over-humidified and the voltage of the fuel cell stack is abnormal, it is determined that the abnormal state of the fuel cell stack is an over-humidified state of the fuel cell stack;

[0086] When it is determined that the humidity condition of the fuel cell stack is that the fuel cell stack is too dry, and the fuel cell stack voltage is abnormal, it is determined that the abnormal state of the fuel cell stack is an over-dry state of the fuel cell stack;

[0087] When it is determined that the humidity of the fuel cell stack is normal, or when the voltage of the fuel cell stack is normal, it is determined that the abnormal state of the fuel cell stack is not abnormal.

[0088] In an embodiment, the stack voltage condition and the stack humidity condition may be determined in sequence. When the stack humidity condition is that the stack is over-humid and the stack voltage is abnormal, the abnormal state of the fuel cell stack is determined to be an over-humid state; when the stack humidity condition is that the stack is too dry and the stack voltage is abnormal, the abnormal state of the fuel cell stack is determined to be an over-dry state; when the stack humidity condition is that the stack humidity is normal or the stack voltage is normal, the abnormal state of the fuel cell stack is determined to be a normal state.

[0089] S210. When it is determined that the abnormal state of the fuel cell stack is an over-dry state of the stack, the humidity control rule is determined to increase the opening of the thermostat by a preset first proportion, increase the fan speed of the radiator by a preset first size, reduce the opening of the humidifier bypass valve by a preset second proportion, reduce the speed of the air compressor by a preset second size, and reduce the opening of the air pressure regulating valve by a preset third proportion.

[0090] In one embodiment, a thermostat is used to control the amount of coolant out of the stack entering the radiator; the radiator is used to dissipate the heat of the coolant out of the stack to reduce the temperature of the coolant out of the stack and adjust the humidity abnormality threshold; the air compressor is used to provide dry air to the humidifier; the air pressure regulating valve is used to adjust the air pressure of the fuel cell stack to control the amount of humid air output by the fuel cell stack; the humidifier bypass valve is used to adjust the amount of humid air output by the fuel cell stack entering the humidifier, so that the humidifier mixes the humid air output by the fuel cell stack with the dry air provided by the air compressor to adjust the humidity of the gas input to the fuel cell stack.

[0091] The preset first ratio can be understood as the preset proportional value of the thermostat opening. For example, the preset first ratio can include but is not limited to 1%, 3% or 5%, etc.; the preset first size can be understood as the preset size of the fan speed of the radiator. For example, the preset first size can include but is not limited to 10 rpm, 50 rpm or 100 rpm, etc.; the preset second ratio can be understood as the preset proportional value of the opening of the humidifier bypass valve. For example, the preset first ratio can include but is not limited to 1%, 3% or 5%, etc.; the preset first size can be understood as the preset size of the speed of the air compressor. For example, the preset second size can include but is not limited to 10 rpm, 50 rpm or 100 rpm, etc.; the preset third ratio can be understood as the preset proportional value of the opening of the air pressure regulating valve. For example, the preset third ratio can include but is not limited to 1%, 3% or 5%, etc. When the thermostat opening increases, the amount of coolant entering the radiator decreases; when the radiator fan speed increases, the heat dissipation rate of the coolant entering the stack increases; when the humidifier bypass valve opening increases, the amount of humid air output by the fuel cell stack entering the humidifier increases, and the humidity of the mixed air generated by the humidifier mixing the humid air output by the fuel cell stack with the dry air provided by the air compressor increases; when the speed of the air compressor increases, the amount of dry air provided to the humidifier can be increased; when the opening of the air pressure regulating valve increases, it can be used to increase the air pressure of the fuel cell stack and increase the amount of humid air output by the fuel cell stack.

[0092] In an embodiment, when the abnormal state of the fuel cell stack is an over-dry state of the stack, the humidity control rule can be determined to increase the opening of the thermostat by a preset first ratio, increase the fan speed of the radiator by a preset first size, reduce the opening of the humidifier bypass valve by a preset second ratio, reduce the speed of the air compressor by a preset second size, and reduce the opening of the air pressure regulating valve by a preset third ratio. The preset first ratio, the preset first size, the preset second ratio, the preset second size, and the preset third ratio can be preset according to user needs.

[0093] S211. When it is determined that the abnormal state of the fuel cell stack is an over-humidity state of the stack, the humidity control rule is determined to reduce the opening of the thermostat by a preset first proportion, increase the fan speed of the radiator by a preset first size, increase the opening of the humidifier bypass valve by a preset second proportion, increase the speed of the air compressor by a preset second size, and increase the rated opening of the air pressure regulating valve by a preset third proportion.

[0094] In an embodiment, when it is determined that the abnormal state of the fuel cell stack is an over-humidification state of the stack, the corresponding humidity control rule can be extracted. The humidity control rule can be to reduce the opening of the thermostat by a preset first proportion, increase the fan speed of the radiator by a preset first size, increase the opening of the humidifier bypass valve by a preset second proportion, increase the speed of the air compressor by a preset second size, and increase the rated opening of the air pressure regulating valve by a preset third proportion.

[0095] S212. When it is determined that the abnormal state of the fuel cell stack is not abnormal, the difference between the current operating humidity and the preset humidity is determined as the humidity deviation value, and the humidity deviation value is input into the preset deviation determination controller to determine the humidifier bypass valve opening threshold, and the humidifier bypass valve opening is adjusted according to the humidifier bypass valve opening threshold.

[0096] The preset deviation determination controller is a controller that is preset to determine the humidifier bypass valve opening threshold according to the humidity deviation value. In actual operation, the preset deviation determination controller may be a proportional-integral controller (PI controller).

[0097] In the embodiment, when it is determined that the abnormal state of the fuel cell stack is a non-abnormal state, the difference between the current operating humidity and the preset humidity can be determined, and the difference is used as a humidity deviation value. The humidity deviation value is input into the preset deviation determination controller, and the humidifier bypass valve opening threshold is determined by closed-loop calculation, and the humidifier bypass valve opening is adjusted to the humidifier bypass valve opening. In other words, if the current operating humidity is greater than the preset humidity, the humidifier bypass valve opening can be increased; if the current operating humidity is less than the preset humidity, the humidifier bypass valve opening can be reduced.

[0098] S213. Control the working state of the target device according to the humidity control rule to control the operating humidity of the fuel cell stack.

[0099] In an embodiment of the present invention, an abnormal threshold of a fuel cell stack is determined by the stack output current of the fuel cell stack, the coolant temperature out of the stack and the cell voltage of each cell, and the stack voltage of the fuel cell stack is determined according to the voltage difference, the voltage average value, the cell voltage difference threshold in the abnormal threshold and the average cell voltage threshold in the abnormal threshold respectively; the stack humidity of the fuel cell stack is determined according to the current operating humidity, the maximum humidity threshold in the abnormal threshold and the minimum humidity threshold in the abnormal threshold, and the abnormal state of the fuel cell stack is determined to improve the accuracy of abnormal state determination, and the humidity control rule is determined according to different abnormal states, and the working state of the target device is controlled according to the humidity control rule to control the operating humidity of the fuel cell stack, thereby achieving reasonable control of the operating humidity of the fuel cell stack and improving the user experience.

[0100] Embodiment 3

[0101] Figure 3 1 is a schematic diagram of a humidity control system according to Embodiment 3 of the present invention. The humidity control system is a system for executing fuel cell operation and controlling the operating humidity of a fuel cell stack. Figure 3 As shown, the humidity control system includes: a fuel cell stack 1, a hydrogen injector 2, a water-hydrogen separator 3, a water storage tank air compressor 4, an air compressor 5, a humidifier 6, a water pump 7, a thermostat 8, a radiator 9, a hydrogen line drain valve 10, an air inlet shut-off valve 11, an air pressure regulating valve 12, a humidifier bypass valve 13, an outlet humidity sensor 14, an outlet water temperature sensor 15 and a CVM controller 16.

[0102] The inlet of the humidifier 6 is connected to the outlet of the air compressor 5 and the outlet of the air pressure regulating valve 12 respectively; the outlet of the humidifier 6 is connected to the inlet of the air inlet stop valve 11; the outlet of the air inlet stop valve 11 is connected to the cathode inlet of the fuel cell stack 1; the cathode outlet of the fuel cell stack 1 is connected to the inlet of the air pressure regulating valve 12; the out-of-stack humidity sensor 14 is connected to the cathode inlet of the fuel cell stack 1 and the inlet of the air pressure regulating valve 12 respectively; the out-of-stack water temperature sensor 15 is connected to the inlet of the thermostat 8 and the fuel cell stack 1 respectively. The anode outlet of the fuel cell stack 1 is connected; the anode outlet of the fuel cell stack 1 is also connected to the inlet of the radiator 9 and the inlet of the thermostat 8; the outlet of the thermostat 8 is connected to the inlet of the water pump 7; the outlet of the water pump 7 is connected to the inlet of the cathode of the fuel cell stack 1; the inlet of the hydrogen injector 2 is connected to the anode outlet of the fuel cell stack 1; the water-hydrogen separator 3 is respectively connected to the anode inlet of the fuel cell stack 1, the outlet of the hydrogen injector 2 and the inlet of the water storage tank 4; the hydrogen path drain valve 10 is connected to the outlet of the water storage tank 4.

[0103] The fuel cell stack 1 is a power generation device composed of a single chip of a proton exchange membrane fuel cell; the hydrogen injector 2 provides the stack with hydrogen of the required pressure and flow rate; the water-hydrogen separator 3 separates the hydrogen and liquid water in the anode gas out of the stack; the water storage tank 4 stores the anode liquid water separated from the water-hydrogen separator 3; the air compressor 5 provides the stack with air of a certain pressure and flow rate; the humidifier 6 mixes the wet air out of the stack with the dry air from the air compressor 5 to humidify the dry air; the water pump 7 is a power device for the water circuit, providing power for the water circulation; the thermostat 8 is an electrically controlled three-way valve, which adjusts the amount of water entering the radiator and starts the water temperature control function. Use; the radiator 9 is a combination of a fan and a water pipe, which dissipates the heat for the coolant out of the stack; the hydrogen circuit drain valve 10 is controlled to discharge the liquid water flowing into the water storage tank on the anode side at different opening cycles and opening times; the air inlet shut-off valve 11 controls the moment when air enters the stack; the air pressure regulating valve 12 adjusts the cathode air pressure; the humidifier bypass valve 13 adjusts the humid air entering the humidifier and adjusts the humidity of the air entering the stack; the outflow humidity sensor 14 collects the outflow air humidity value; the outflow water temperature sensor 15 collects the outflow coolant temperature value; the CVM controller is used to collect the voltage of the single cell of the fuel cell stack and can output the maximum, minimum and average single cell voltage.

[0104] In one embodiment, the method of adjusting the humidity of the air entering the stack by using a humidifier 10 is slow in adjusting the humidity of the entire stack, and cannot quickly restore the stack to normal operation, which can easily cause the stack to oscillate. Therefore, a slow adjustment method is used to speed up the adjustment method to achieve rapid and stable control of the humidity of the stack.

[0105] Among them, the slow adjustment method (i.e., applied when the abnormal state of the fuel cell stack is in the non-abnormal state) uses the humidity deviation value between the preset humidity of the stack and the current operating humidity to calculate the humidifier bypass valve opening in a closed loop using a PI controller (proportional-integral algorithm), and the humidifier bypass valve opening obtained by this closed loop calculation is the set value. When the air humidity out of the stack (current operating humidity) is less than the set value, the humidifier bypass valve is driven to close, increase the humidified air flow entering the humidifier, and increase the air humidity entering the stack. When the air humidity out of the stack (current operating humidity) is greater than the set value, the humidifier bypass valve is driven to open, reduce the humidified air flow entering the humidifier, and reduce the air humidity entering the stack.

[0106] Among them, the fast adjustment method (that is, applied when the abnormal state of the fuel cell stack is that the stack is too dry or too wet) comprehensively considers the current real-time air humidity of the stack (current operating humidity) and the voltage value of the single cell to determine that the humidity of the stack is abnormal and needs to be drained quickly.

[0107] In actual operation, it is assumed that the current operating humidity is Wact, the maximum threshold of the air humidity setting value out of the stack (maximum humidity threshold) is Wsetmax, and the minimum threshold of the air humidity setting value out of the stack (minimum humidity threshold) is Wsetmin. Among them, the maximum humidity threshold and the minimum humidity threshold are both obtained by looking up the table. Among them, the preset humidity mapping table is a three-dimensional table, the X-axis is the output current of the stack, the Y-axis is the coolant temperature out of the stack, and the Z-axis is the maximum humidity threshold and the minimum humidity threshold. When Wact≥Wsetmax and the delay time ΔT is met, the stack is judged to be over-humid, and the stack over-humidity abnormal state quantity STwup=1 is calibrated, otherwise STwup=0. When Wact<Wsetmin and the delay time ΔT is met, the stack is judged to be too dry, and the stack over-dryness abnormal state quantity STwdown=1 is calibrated, otherwise STwdown=0.

[0108] Assume that the maximum single-cell voltage (the maximum value of the single-cell voltage) of the battery stack collected by the CVM controller is Vcmax, the minimum single-cell voltage (the minimum value of the single-cell voltage) is Vcmin, and the average single-cell voltage is Vcave. Let the battery stack single-cell voltage difference threshold be Vcdifset, and the average single-cell voltage threshold be Vcaveset. The above thresholds are all obtained by looking up the table. The X-axis of the preset voltage mapping two-dimensional table is the battery stack output current, and the Y-axis is the corresponding threshold. The table lookup with the battery stack output current can better match the requirements for different thresholds under different battery stack working conditions. When it is determined that (Vcmax-Vcmin) ≥ Vcdifset and Vcave ≤ Vcaveset and the delay time ΔT is met, the battery stack voltage is judged to be abnormal, and the abnormal state quantity of the battery stack voltage is calibrated STvab=1, otherwise STvab=0.

[0109] If STwdown=1 and STvab=1, it is judged that the stack is in an over-dry state. At this time, the humidity control rule is to lower the set temperature of the coolant out of the stack, and the control target is the thermostat opening and the radiator fan speed, reduce the excess air coefficient of the air supply, and then reduce the set value of the air flow into the stack. The control target is the air compressor speed and the air control valve opening; reduce the humidifier bypass valve set opening. Specifically, the control signal is to increase the thermostat opening, increase the radiator fan speed; reduce the humidifier bypass valve set opening; reduce the air compressor speed, and reduce the air control valve opening. Exemplarily, the above control signals are all calibrable variables, which can be calibrated quantities or charts.

[0110] If STwup=1 and STvab=1, it is judged that the stack is in an over-humidified state. At this time, the humidity control rule is to increase the set temperature of the coolant out of the stack, the control target is the thermostat opening and the radiator fan speed, and increase the set opening of the humidifier bypass valve; increase the excess air coefficient of the air supply, and then increase the set value of the air flow into the stack. The control target is the air compressor speed and the air control valve opening; reduce the opening cycle of the hydrogen exhaust valve, increase the opening time of the hydrogen drain valve, and strengthen the anode drainage. The specific control signal is to reduce the thermostat opening, reduce the radiator fan speed; increase the set opening of the humidifier bypass valve; increase the air compressor speed, increase the opening of the air control valve; reduce the opening cycle of the hydrogen exhaust valve, increase the opening time of the hydrogen drain valve, and strengthen the anode drainage.

[0111] The present invention controls the stack air flow rate by table lookup or algorithm calculation based on the actual operating status parameters of the current fuel cell system, and then controls the stack humidity, ensuring stable and efficient operation of the system. At the same time, the fuel cell membrane dryness and flooding conditions are judged through real-time operating parameters, involving many parameters and considering more comprehensive scenarios, thereby reducing the risk of misjudgment and improving system operation stability.

[0112] Embodiment 4

[0113] Figure 4 is a structural schematic diagram of a humidity control device provided according to a fourth embodiment of the present invention. Figure 4 As shown, the device includes: a data acquisition module 41, a threshold determination module 42, a state determination module 43 and a humidity control module 44.

[0114] The data acquisition module 41 is used to obtain the current operating humidity and operating parameters of the fuel cell stack;

[0115] A threshold determination module 42, used to determine an abnormal threshold of a fuel cell stack according to operating parameters;

[0116] A state determination module 43, used to determine the abnormal state of the fuel cell stack according to the current operating humidity, working parameters and abnormal thresholds;

[0117] The humidity control module 44 is used to determine a humidity control rule according to the abnormal state, and control the working state of the target device according to the humidity control rule to control the operating humidity of the fuel cell stack.

[0118] The technical solution of the embodiment of the present invention is to obtain the current operating humidity and working parameters of the fuel cell stack through the data acquisition module, the threshold determination module determines the abnormal threshold of the fuel cell stack according to the working parameters, and the state determination module determines the abnormal state of the fuel cell stack according to the current operating humidity, working parameters and abnormal threshold, so as to improve the accuracy of abnormal state determination and reduce the risk of misjudgment, determine the humidity control rule according to the abnormal state through the humidity control module, and control the working state of the target device according to the humidity control rule to control the operating humidity of the fuel cell stack, determine the corresponding humidity control rule according to the abnormal state, improve the timeliness of operating humidity adjustment, and enhance the stability of fuel cell stack operation.

[0119] In one embodiment, the data acquisition module includes:

[0120] A humidity determination unit, used to collect the stack outlet humidity obtained by a preset stack outlet humidity sensor as the current operating humidity of the fuel cell stack;

[0121] The parameter determination unit is used to collect the stack output current, the stack coolant temperature and the single cell voltage of each single cell of the fuel cell stack, and use the stack output current, the stack coolant temperature and the single cell voltage as working operation parameters.

[0122] In one embodiment, the threshold determination module includes:

[0123] A humidity threshold determination unit is used to extract a preset humidity mapping table, and search the preset humidity mapping table for a humidity threshold as a humidity abnormality threshold according to the stack output current and the stack coolant temperature in the working operation parameters; wherein the humidity abnormality threshold includes a maximum humidity threshold and a minimum humidity threshold;

[0124] A voltage threshold determination unit is used to extract a preset voltage mapping table, and search the preset voltage mapping table for a single cell voltage difference threshold and an average single cell voltage threshold as a voltage abnormality threshold according to the stack output current in the working operation parameters;

[0125] The abnormal threshold determination unit is used to use the humidity abnormal threshold and the voltage abnormal threshold as the abnormal threshold of the fuel cell stack.

[0126] In one embodiment, the state determination module includes:

[0127] A voltage value determination unit, used to determine the maximum value and the minimum value of the single cell voltage in the working operation parameter, taking the difference between the maximum value and the minimum value as the voltage difference, and taking the average value of each single cell voltage as the voltage average value;

[0128] A voltage condition determination unit, used to determine the voltage condition of the fuel cell stack according to the voltage difference, the voltage average, the single cell voltage difference threshold in the abnormal threshold, and the average single cell voltage threshold in the abnormal threshold;

[0129] A humidity condition determination unit, used to determine the humidity condition of the fuel cell stack according to the current operating humidity, the maximum humidity threshold value in the abnormal threshold value, and the minimum humidity threshold value in the abnormal threshold value;

[0130] The abnormal state determination unit is used to determine the abnormal state of the fuel cell stack according to the voltage condition and humidity condition of the fuel cell stack.

[0131] In one embodiment, the voltage condition determination unit is specifically configured to:

[0132] When it is determined within the preset extended time that the voltage difference is greater than or equal to the single cell voltage difference threshold in the abnormal threshold, and the voltage average is less than or equal to the average single cell voltage threshold in the abnormal threshold, it is determined that the stack voltage of the fuel cell stack is abnormal;

[0133] When it is determined that the voltage difference is less than the single cell voltage difference threshold value within the preset extended time, and the voltage average value is greater than the average single cell voltage threshold value, it is determined that the stack voltage of the fuel cell stack is normal.

[0134] In one embodiment, the humidity condition determination unit is specifically configured to:

[0135] When it is determined that the current operating humidity is greater than the maximum humidity threshold in the abnormal threshold within the preset extended time, determining that the fuel cell stack is overhumidified;

[0136] When it is determined that the current operating humidity is less than the minimum humidity threshold in the abnormal threshold within the preset extended time, it is determined that the fuel cell stack is too dry;

[0137] When it is determined that the current operating humidity is greater than the minimum humidity threshold and less than the maximum humidity threshold within a preset extended time, it is determined that the stack humidity of the fuel cell stack is normal.

[0138] In one embodiment, the abnormal state determination unit is specifically configured to:

[0139] When it is determined that the humidity condition of the fuel cell stack is that the fuel cell stack is over-humidified and the voltage of the fuel cell stack is abnormal, it is determined that the abnormal state of the fuel cell stack is an over-humidified state of the fuel cell stack;

[0140] When it is determined that the humidity condition of the fuel cell stack is that the fuel cell stack is too dry, and the fuel cell stack voltage is abnormal, it is determined that the abnormal state of the fuel cell stack is an over-dry state of the fuel cell stack;

[0141] When it is determined that the humidity of the fuel cell stack is normal, or when the voltage of the fuel cell stack is normal, it is determined that the abnormal state of the fuel cell stack is not abnormal.

[0142] In one embodiment, the humidity control module comprises:

[0143] A first control unit is used to, when it is determined that the abnormal state of the fuel cell stack is an over-dry state, determine the humidity control rule to increase the opening of the thermostat by a preset first ratio, increase the fan speed of the radiator by a preset first size, reduce the opening of the humidifier bypass valve by a preset second ratio, reduce the speed of the air compressor by a preset second size, and reduce the opening of the air pressure regulating valve by a preset third ratio;

[0144] a second control unit, for, when determining that the abnormal state of the fuel cell stack is an over-humidified state of the stack, determining a humidity control rule to reduce the opening of the thermostat by a preset first ratio, increase the fan speed of the radiator by a preset first magnitude, increase the opening of the humidifier bypass valve by a preset second ratio, increase the speed of the air compressor by a preset second magnitude, and increase the rated opening of the air pressure regulating valve by a preset third ratio;

[0145] The third control unit is used to determine the difference between the current operating humidity and the preset humidity as the humidity deviation value when it is determined that the abnormal state of the fuel cell stack is not abnormal, input the humidity deviation value into the preset deviation determination controller to determine the humidifier bypass valve opening threshold, and adjust the humidifier bypass valve opening according to the humidifier bypass valve opening threshold.

[0146] In one embodiment, a thermostat is used to control the amount of out-of-stack coolant entering the radiator;

[0147] The radiator is used to dissipate the heat of the coolant discharged from the reactor to reduce the temperature of the coolant discharged from the reactor and adjust the humidity abnormality threshold;

[0148] The air compressor is used to provide dry air to the humidifier;

[0149] The air pressure regulating valve is used to adjust the air pressure of the fuel cell stack to control the amount of humid air output by the fuel cell stack;

[0150] The humidifier bypass valve is used to adjust the amount of humid air output by the fuel cell stack entering the humidifier, so that the humidifier mixes the humid air output by the fuel cell stack with the dry air provided by the air compressor to adjust the humidity of the gas input to the fuel cell stack.

[0151] In one embodiment, the humidity control device further comprises:

[0152] An operating parameter determination module, used to determine the current operating humidity and the working operating parameters after adjusting the working state of the target device as the adjusted operating humidity and the adjusted working operating parameters;

[0153] The state adjustment module is used to determine the abnormal state of the adjusted fuel cell stack based on the adjusted operating humidity and the adjusted working operating parameters, and control the working state of the target device according to the humidity control rule corresponding to the abnormal state of the adjusted fuel cell stack.

[0154] The humidity control device provided in the embodiment of the present invention can execute the humidity control method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0155] Embodiment 5

[0156] Figure 5 Schematic diagram of the structure of an electronic device for implementing the humidity control method of an embodiment of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0157] like Figure 5 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0158] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0159] The processor 11 may be a variety of general and / or dedicated processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as a humidity control method.

[0160] In some embodiments, the humidity control method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the humidity control method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the humidity control method in any other appropriate manner (e.g., by means of firmware).

[0161] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0162] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0163] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0164] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0165] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0166] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0167] In one embodiment, the embodiment of the present invention further includes a computer program product, the computer program product includes a computer program, and the computer program implements the humidity control method of any embodiment of the present invention when executed by a processor.

[0168] In the process of implementation, the computer program product can be written in one or more programming languages ​​or a combination thereof to perform the computer program code of the present invention, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

[0169] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0170] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A humidity control method, It is characterized in that include: Obtain the current operating humidity and working parameters of the fuel cell stack; Determining an abnormal threshold of the fuel cell stack according to the operating parameters; Determining an abnormal state of the fuel cell stack according to the current operating humidity, the working operating parameter and the abnormal threshold; A humidity control rule is determined according to the abnormal state, and the working state of the target device is controlled according to the humidity control rule to control the operating humidity of the fuel cell stack.

2. The method according to claim 1, It is characterized in that The obtaining of the current operating humidity and operating parameters of the fuel cell stack includes: Collecting the stack outlet humidity obtained by a preset stack outlet humidity sensor as the current operating humidity of the fuel cell stack; The stack output current, the stack coolant temperature and the cell voltage of each cell of the fuel cell stack are collected, and the stack output current, the stack coolant temperature and the cell voltage are used as working parameters.

3. The method according to claim 1, It is characterized in that The determining the abnormal threshold of the fuel cell stack according to the operating parameters includes: Extracting a preset humidity mapping table, and searching for a humidity threshold in the preset humidity mapping table as a humidity abnormality threshold according to the stack output current and the stack coolant temperature in the working operation parameters; wherein the humidity abnormality threshold includes a maximum humidity threshold and a minimum humidity threshold; Extracting a preset voltage mapping table, and searching the preset voltage mapping table for a single cell voltage difference threshold and an average single cell voltage threshold as a voltage abnormality threshold according to the stack output current in the working operation parameters; The humidity abnormality threshold and the voltage abnormality threshold are used as abnormality thresholds of the fuel cell stack.

4. The method according to claim 1, It is characterized in that The determining the abnormal state of the fuel cell stack according to the current operating humidity, the working operating parameter and the abnormal threshold value includes: Determine a maximum value and a minimum value of the single cell voltage in the operating parameters, take the difference between the maximum value and the minimum value as the voltage difference, and take the average value of each of the single cell voltages as the voltage average value; Determine the stack voltage of the fuel cell stack according to the voltage difference, the voltage average, the single cell voltage difference threshold in the abnormal threshold, and the average single cell voltage threshold in the abnormal threshold; Determine the humidity of the fuel cell stack according to the current operating humidity, the maximum humidity threshold in the abnormal thresholds, and the minimum humidity threshold in the abnormal thresholds; The abnormal state of the fuel cell stack is determined according to the voltage condition of the fuel cell stack and the humidity condition of the fuel cell stack.

5. The method according to claim 4, It is characterized in that The method of determining the voltage condition of the fuel cell stack according to the voltage difference, the voltage average, the single cell voltage difference threshold in the abnormal threshold, and the average single cell voltage threshold in the abnormal threshold includes: When it is determined within the preset extended time that the voltage difference is greater than or equal to the single cell voltage difference threshold in the abnormal threshold, and the voltage average value is less than or equal to the average single cell voltage threshold in the abnormal threshold, it is determined that the stack voltage of the fuel cell stack is abnormal; When it is determined that the voltage difference is less than the single cell voltage difference threshold value within the preset extended time, and the voltage average value is greater than the average single cell voltage threshold value, it is determined that the stack voltage of the fuel cell stack is normal.

6. The method according to claim 4, It is characterized in that The determining of the humidity of the fuel cell stack according to the current operating humidity, the maximum humidity threshold in the abnormal thresholds, and the minimum humidity threshold in the abnormal thresholds includes: When it is determined that the current operating humidity is greater than a maximum humidity threshold in the abnormal threshold within a preset extended time, determining that the fuel cell stack is overhumidified; When it is determined that the current operating humidity is less than a minimum humidity threshold in the abnormal threshold within the preset extended time, determining that the fuel cell stack is too dry; When it is determined that the current operating humidity is greater than the minimum humidity threshold and less than the maximum humidity threshold within the preset extended time, it is determined that the stack humidity of the fuel cell stack is normal.

7. The method according to claim 4, It is characterized in that The determining the abnormal state of the fuel cell stack according to the voltage condition of the fuel cell stack and the humidity condition of the fuel cell stack includes: When it is determined that the humidity condition of the fuel cell stack is that the fuel cell stack is over-humidified, and the fuel cell stack voltage is abnormal, determining that the abnormal state of the fuel cell stack is an over-humidified state of the fuel cell stack; When it is determined that the humidity condition of the fuel cell stack is that the fuel cell stack is too dry, and the fuel cell stack voltage is abnormal, determining that the abnormal state of the fuel cell stack is an over-dry state of the fuel cell stack; When it is determined that the humidity condition of the fuel cell stack is normal, or when it is determined that the voltage of the fuel cell stack is normal, it is determined that the abnormal state of the fuel cell stack is not abnormal.

8. The method according to claim 1, It is characterized in that The step of determining a humidity control rule according to the abnormal state comprises: When it is determined that the abnormal state of the fuel cell stack is an over-dry state, the humidity control rule is determined to increase the opening of the thermostat by a preset first ratio, increase the fan speed of the radiator by a preset first size, reduce the opening of the humidifier bypass valve by a preset second ratio, reduce the speed of the air compressor by a preset second size, and reduce the opening of the air pressure regulating valve by a preset third ratio; When it is determined that the abnormal state of the fuel cell stack is an over-humidified state of the stack, the humidity control rule is determined to reduce the opening of the thermostat by the preset first ratio, increase the fan speed of the radiator by the preset first size, increase the opening of the humidifier bypass valve by the preset second ratio, increase the speed of the air compressor by the preset second size, and increase the rated opening of the air pressure regulating valve by the preset third ratio; When it is determined that the abnormal state of the fuel cell stack is not abnormal, the difference between the current operating humidity and the preset humidity is determined as the humidity deviation value, and the humidity deviation value is input into the preset deviation determination controller to determine the humidifier bypass valve opening threshold, and the humidifier bypass valve opening is adjusted according to the humidifier bypass valve opening threshold.

9. The method according to claim 8, It is characterized in that The thermostat is used to control the amount of the out-of-combination coolant entering the radiator; The radiator is used to dissipate the heat of the coolant discharged from the stack, so as to reduce the temperature of the coolant discharged from the stack and adjust the humidity abnormality threshold; The air compressor is used to provide dry air for the humidifier; The air pressure regulating valve is used to adjust the air pressure of the fuel cell stack to control the amount of humid air output by the fuel cell stack; The humidifier bypass valve is used to adjust the amount of humid air output by the fuel cell stack entering the humidifier, so that the humidifier mixes the humid air output by the fuel cell stack with the dry air provided by the air compressor to adjust the humidity of the gas input to the fuel cell stack.

10. The method according to claim 1, It is characterized in that After determining the humidity control rule according to the abnormal state and controlling the working state of the target device according to the humidity control rule, the method further includes: Determining the current operating humidity and the working operating parameters after adjusting the working state of the target device as the adjusted operating humidity and the adjusted working operating parameters; The abnormal state of the adjusted fuel cell stack is determined based on the adjusted operating humidity and the adjusted working operating parameters, and the working state of the target device is controlled according to the humidity control rule corresponding to the abnormal state of the adjusted fuel cell stack.

11. A humidity control device, It is characterized in that include: A data acquisition module, used to obtain the current operating humidity and working parameters of the fuel cell stack; A threshold determination module, used to determine an abnormal threshold of the fuel cell stack according to the operating parameters; A state determination module, used to determine the abnormal state of the fuel cell stack according to the current operating humidity, the working operating parameters and the abnormal threshold; The humidity control module is used to determine a humidity control rule according to the abnormal state, and control the working state of the target device according to the humidity control rule to control the operating humidity of the fuel cell stack.

12. The device according to claim 11, It is characterized in that The data acquisition module comprises: A humidity determination unit, used to collect the stack outlet humidity obtained by a preset stack outlet humidity sensor as the current operating humidity of the fuel cell stack; The parameter determination unit is used to collect the stack output current, the stack coolant temperature and the cell voltage of each cell of the fuel cell stack, and use the stack output current, the stack coolant temperature and the cell voltage as working parameters.

13. An electronic device, It is characterized in that The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform the humidity control method according to any one of claims 1 to 10.

14. A computer-readable storage medium, It is characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the humidity control method according to any one of claims 1 to 10 when executed.

15. A computer program product, It is characterized in that The computer program product comprises a computer program, which, when executed by a processor, implements the humidity control method according to any one of claims 1 to 10.

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