Method, device, vehicle and storage medium for controlling a proton exchange membrane fuel cell

Abstract

The application relates to the technical field of vehicles and discloses a control method and device for a proton exchange membrane fuel cell, a vehicle and a storage medium, the method comprising the following steps: after determining that humidification is enabled, the SOC of a power battery is acquired, and the humidification mode is evaluated according to the SOC; when it is determined that a high-power humidification mode needs to be executed, the average power of the fuel cell in a previous set time period is acquired; when the SOC of the power battery is less than a set electric quantity and the average power is not less than a first set power, the humidification power of the battery is determined as a first execution power, the first execution power is used to determine a first expected temperature, the first expected temperature is corrected based on the heat dissipation parameter of a radiator to obtain a first execution temperature, the battery is operated at the first execution power, and the cooling liquid enters the battery at the first execution temperature, so that the condensate water in the stack of the proton exchange membrane fuel cell can be significantly improved, automatic humidification is realized, and the working condition of the current vehicle can be matched.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a control method, apparatus, vehicle, and storage medium for a proton exchange membrane fuel cell. Background Technology

[0002] Proton exchange membrane fuel cells (PEMFCs) are increasingly being used in automobiles due to their advantages such as zero emissions, high efficiency, long lifespan, and suitable size and operating temperature, showing promising market prospects. One of the core components of a PEMFC is the proton exchange membrane (PEM). Since the PEM requires suitable humidity levels to efficiently and stably transport hydrogen protons, adjusting and controlling the internal humidity of the fuel cell stack is a crucial measure to ensure the high efficiency and long lifespan of the PEMFC.

[0003] In existing technologies, there are two main methods for humidifying fuel cell stacks: one is external humidification, which mainly involves installing a humidifier on the cathode side to humidify the air at the anode inlet of the fuel cell stack. The most common humidifier uses the humid gas discharged from the fuel cell as a humidity source to humidify the air from the compressor before it enters the stack. The other is self-humidification, which increases the humidity of the hydrogen at the anode inlet of the fuel cell stack through anode recirculation, thereby achieving self-humidification. However, in some special operating scenarios and conditions, when the vehicle's power demand is low and the fuel cell operates at low power for extended periods, the water production inside the fuel cell stack is small, and both self-humidification and external humidification capabilities are relatively low. This can easily lead to the fuel cell stack being in a low-humidity state, which adversely affects the efficiency and durability of the fuel cell system. Summary of the Invention

[0004] The purpose of this invention is to provide a control method, device, vehicle, and storage medium for proton exchange membrane fuel cells, in order to solve the problem in the prior art that when fuel cells operate at low power for a long time, the fuel cell stack is easily kept in a low humidity state, which has an adverse effect on the efficiency and durability of the fuel cell system.

[0005] In a first aspect, the present invention provides a control method for a proton exchange membrane fuel cell, the control method comprising:

[0006] S100: Determines humidification enable;

[0007] S110: Obtain the SOC of the power battery;

[0008] S120: Under the premise that there is no fault report in the vehicle, evaluate the humidification mode based on the SOC of the power battery. The humidification mode includes a high-power humidification mode and an idle humidification mode. The humidification power of the proton exchange membrane fuel cell in the high-power humidification mode is greater than the humidification power of the proton exchange membrane fuel cell in the idle humidification mode.

[0009] If it is determined that a high-power humidification mode needs to be executed, then execute S130;

[0010] S130: Obtain the average power of the proton exchange membrane fuel cell over a previously set time period;

[0011] S140: Determine whether the SOC of the power battery is less than a set charge and whether the average power is not less than a first set power;

[0012] If so, then execute S150;

[0013] S150: Determine the humidification power of the proton exchange membrane fuel cell as the first execution power;

[0014] S160: Determine the first expected temperature based on the first execution power;

[0015] S170: Obtain the heat dissipation parameters of the radiator, including the power of the radiator and the ambient temperature;

[0016] S180: Based on the heat dissipation parameters, the first expected temperature is corrected to obtain the first execution temperature;

[0017] S190: Perform a first high-power humidification operation, including: the proton exchange membrane fuel cell operating at the first execution power, and controlling the coolant to enter the proton exchange membrane fuel cell at the first execution temperature.

[0018] As a preferred technical solution for proton exchange membrane fuel cells, in S140, if the SOC of the power battery is not less than a set charge, or the average power is less than a first set power, then S200 is executed.

[0019] S200: Determine the humidification power of the proton exchange membrane fuel cell as the second execution power, where the second execution power is less than the first execution power;

[0020] S210: Determine the second expected temperature based on the second execution power;

[0021] S220: Obtain the heat dissipation parameters of the radiator, including the power of the radiator and the ambient temperature;

[0022] S230: Based on the heat dissipation parameters, the second predicted temperature is corrected to obtain the second execution temperature;

[0023] S240: Perform a second high-power humidification operation, including: the proton exchange membrane fuel cell operating at the second power, and controlling the coolant to enter the proton exchange membrane fuel cell at the second temperature.

[0024] As a preferred technical solution for proton exchange membrane fuel cells, if it is determined that the idling humidification mode is to be executed in S120, then S250 is executed.

[0025] S250: Determine the humidification power of the proton exchange membrane fuel cell as the third execution power;

[0026] S260: Determine the third expected temperature based on the third execution power;

[0027] S270: Obtain the heat dissipation parameters of the radiator, including the power of the radiator and the ambient temperature;

[0028] S280: Based on the heat dissipation parameters, the third predicted temperature is corrected to obtain the third execution temperature;

[0029] S290: Performing an idle humidification operation, including: the proton exchange membrane fuel cell operating at the third execution power, and controlling the coolant to enter the proton exchange membrane fuel cell at the third execution temperature.

[0030] As a preferred technical solution for proton exchange membrane fuel cells, the control method for the proton exchange membrane fuel cell further includes the following steps following S190, S240, and S290:

[0031] S300: Accumulate the first duration of executing the first high-power humidification operation, accumulate the second duration of executing the second high-power humidification operation, and accumulate the third duration of executing the idle humidification operation;

[0032] S310: Determine a first correction coefficient based on the first execution power, determine a second correction coefficient based on the second execution power, and determine a third correction coefficient based on the third execution power;

[0033] S320: Calculate the total humidification time;

[0034] Total humidification time = First correction factor * First duration + Second correction factor * Second duration + Third correction factor * Third duration;

[0035] S330: Determine whether the total humidification time exceeds the set time;

[0036] If not, then execute S340;

[0037] S340: Determine whether a shutdown command has been received;

[0038] If not, repeat S110.

[0039] As a preferred technical solution for proton exchange membrane fuel cells, in S330, if the total humidification time exceeds the set time, and in S340, a shutdown command is obtained;

[0040] Then stop humidification to enable power.

[0041] As a preferred technical solution for proton exchange membrane fuel cells, the SOC evaluation humidification mode based on the power battery includes:

[0042] When the SOC of the power battery is between the set upper limit and the set boundary, the idle humidification mode is determined to be executed.

[0043] When the SOC of the power battery is less than the set boundary charge, the high-power humidification mode is determined to be executed.

[0044] The upper limit power is greater than the set boundary power, and the set boundary power is greater than the set power.

[0045] As a preferred technical solution for proton exchange membrane fuel cells, the humidification enabling technology includes:

[0046] To obtain the internal humidity of a proton exchange membrane fuel cell;

[0047] Determine whether the internal humidity is lower than the set humidity;

[0048] If so, determine whether the SOC of the power battery is less than the set enable capacity;

[0049] If yes, then humidification is enabled; otherwise, the power battery is consumed until the SOC of the power battery is less than the set enable power.

[0050] In a second aspect, the present invention provides a control device for a proton exchange membrane fuel cell, the control device comprising:

[0051] Enable determination module, used to determine humidification enable;

[0052] The SOC acquisition module is used to acquire the SOC of the power battery.

[0053] The humidification mode determination module is used to evaluate the humidification mode based on the SOC of the power battery under the premise that there is no fault error in the vehicle. The humidification mode includes a high-power humidification mode and an idle humidification mode. The humidification power of the proton exchange membrane fuel cell in the high-power humidification mode is greater than the humidification power of the proton exchange membrane fuel cell in the idle humidification mode.

[0054] The average power acquisition module is used to acquire the average power of the proton exchange membrane fuel cell over a previously set time period when it is determined that a high-power humidification mode needs to be executed.

[0055] The judgment module is used to determine whether the SOC of the power battery is less than a set charge and whether the average power is not less than a first set power.

[0056] The first execution power determination module is used to determine the humidification power of the proton exchange membrane fuel cell as the first execution power when the SOC of the power battery is less than the set charge and the average power is not less than the first set power.

[0057] The first predicted temperature determination module is used to determine the first predicted temperature based on the first execution power;

[0058] A heat dissipation parameter acquisition module is used to acquire the heat dissipation parameters of the radiator, including the power of the radiator and the ambient temperature.

[0059] The first execution temperature determination module is used to correct the first expected temperature based on the heat dissipation parameters and obtain the first execution temperature;

[0060] An execution module is used to perform a first high-power humidification operation, including: the proton exchange membrane fuel cell operating at the first execution power, and controlling the coolant to enter the proton exchange membrane fuel cell at the first execution temperature.

[0061] Thirdly, the present invention also provides a vehicle, including a power battery and a proton exchange membrane fuel cell, the vehicle further comprising:

[0062] Vehicle controller;

[0063] A temperature sensor is used to detect the ambient temperature and send the detected ambient temperature to the vehicle controller;

[0064] Memory, used to store one or more programs;

[0065] When the one or more programs are executed by the vehicle controller, the vehicle controller controls the vehicle to implement the proton exchange membrane fuel cell control method as described in any of the above schemes.

[0066] Fourthly, the present invention also provides a storage medium storing a computer program thereon, which, when executed by a vehicle controller, enables the vehicle to implement the control method of a proton exchange membrane fuel cell as described in any of the above embodiments.

[0067] The beneficial effects of this invention are as follows:

[0068] This invention provides a control method, apparatus, vehicle, and storage medium for a proton exchange membrane fuel cell. The control method involves, upon determining that humidification is enabled, acquiring the state of charge (SOC) of the power battery. Assuming no vehicle malfunctions, the method evaluates the humidification mode based on the SOC. When it is determined that a high-power humidification mode needs to be executed, the method acquires the average power of the proton exchange membrane fuel cell over a previously set time period. When the SOC of the power battery is less than a set charge level, and the average power is not less than a first set power level, the method determines the humidification power of the proton exchange membrane fuel cell as a first execution power. Based on the first execution power, a first expected temperature is determined. The method acquires the heat dissipation parameters of the radiator, corrects the first expected temperature based on the heat dissipation parameters to obtain the first execution temperature, and executes a first high-power humidification operation. This includes: the proton exchange membrane fuel cell operating at the first execution power, and controlling the coolant to enter the proton exchange membrane fuel cell at the first execution temperature. This significantly increases the amount of condensate in the fuel cell stack, achieving automatic humidification, and also matching the current operating conditions of the vehicle. Attached Figure Description

[0069] Figure 1 The flowchart below illustrates the control method for a proton exchange membrane fuel cell in this embodiment of the invention. Figure 1 ;

[0070] Figure 2 The flowchart below illustrates the control method for a proton exchange membrane fuel cell in this embodiment of the invention. Figure 2 ;

[0071] Figure 3 The flowchart below illustrates the control method for a proton exchange membrane fuel cell in this embodiment of the invention. Figure 3 ;

[0072] Figure 4 This is a schematic diagram of the control device for a proton exchange membrane fuel cell in an embodiment of the present invention;

[0073] Figure 5 This is a schematic diagram of the vehicle structure in an embodiment of the present invention.

[0074] In the picture:

[0075] 110. Enable determination module; 120. SOC acquisition module; 130. Humidification mode determination module; 140. Average power acquisition module; 150. Judgment module; 160. First execution power determination module; 170. First expected temperature determination module; 180. Heat dissipation parameter acquisition module; 190. First execution temperature determination module; 200. Execution module;

[0076] 10. Power battery; 20. Proton exchange membrane fuel cell; 30. Vehicle controller; 40. Temperature sensor; 50. Memory. Detailed Implementation

[0077] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0078] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0079] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0080] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0081] Example 1

[0082] In existing technologies, there are two main methods for humidifying fuel cell stacks: one is external humidification, which mainly involves installing a humidifier on the cathode side to humidify the air at the anode inlet of the fuel cell stack. The most common humidifier uses the humid gas discharged from the fuel cell as a humidity source to humidify the air from the compressor before it enters the stack. The other is self-humidification, which increases the humidity of the hydrogen at the anode inlet of the fuel cell stack through anode recirculation, thereby achieving self-humidification. However, in some special operating scenarios and conditions, when the vehicle's power demand is low and the fuel cell operates at low power for extended periods, the water production inside the fuel cell stack is small, and both self-humidification and external humidification capabilities are relatively low. This can easily lead to the fuel cell stack being in a low-humidity state, which adversely affects the efficiency and durability of the fuel cell system.

[0083] To address this issue, this embodiment provides a control method for a proton exchange membrane fuel cell. This control method can be executed by a control device for the proton exchange membrane fuel cell, which can be implemented through software and / or hardware and integrated into the vehicle.

[0084] Specifically, such as Figure 1 As shown, the control method for a proton exchange membrane fuel cell provided in this embodiment includes the following steps.

[0085] S100: Determine humidification enable.

[0086] Specifically, determining the humidification enable includes the following steps:

[0087] S1001: Obtain the internal humidity of the proton exchange membrane fuel cell.

[0088] S1002: Determine if the internal humidity is lower than the set humidity.

[0089] If yes, then execute S1003; otherwise, end.

[0090] S1003: Obtain the battery's SOC (State of Charge, also known as remaining charge) and determine whether the SOC of the power battery is less than the set enable charge.

[0091] If yes, then enable humidification; otherwise, execute S1004.

[0092] S1004: Consume the power of the power battery and repeat S1003.

[0093] In the humidification process, a proton exchange membrane fuel cell (PEMFC) generates water vapor to achieve automatic humidification. The electricity generated by the PEMFC during humidification needs to be stored in the battery. Therefore, the battery's state of charge (SOC) must be lower than the set activation charge before humidification. The set activation charge can be adjusted as needed; specifically, it should ensure that when the battery's SOC is lower than the set activation charge, the battery has sufficient capacity to accommodate the electricity generated by the PEMFC throughout the humidification process.

[0094] In other embodiments, humidification enablement can also be determined by interacting with vehicle control.

[0095] S110: Obtain the SOC of the power battery.

[0096] The SOC of the power battery can be obtained by interacting with the controller of the power battery.

[0097] S120: Humidification mode based on SOC assessment of the power battery, provided that there are no fault reports in the vehicle.

[0098] If it is determined that a high-power humidification mode needs to be executed, then execute S130; if it is determined that an idle humidification mode needs to be executed, then execute S250.

[0099] These include vehicle malfunction reports, such as errors caused by the proton exchange membrane fuel cell, abnormal oil pressure, or abnormal air pressure. Humidification modes include a high-power humidification mode and an idle humidification mode. The humidification power of the proton exchange membrane fuel cell in the high-power humidification mode is greater than that in the idle humidification mode.

[0100] Specifically, the humidification mode based on the SOC of the power battery includes: when the SOC of the power battery is between the set upper limit and the set boundary, the idle humidification mode is executed; when the SOC of the power battery is less than the set boundary, the high-power humidification mode is executed. The upper limit is greater than the set boundary, and the set boundary is greater than the set charge mentioned below. The relationship between the set enable charge and the upper limit can be that the set enable charge is equal to or less than the set upper limit. The lower the SOC of the power battery, the more charge it can store, and the better it can match high-power humidification.

[0101] S130: Obtain the average power of the proton exchange membrane fuel cell over a previously set time period.

[0102] During the operation of a proton exchange membrane fuel cell (PEMFC), the power at each point in time during operation can be stored, forming a time-power curve. This time-power curve does not include the time when the PEMFC is not operating. The average power is the power averaged over a set period of time preceding the current point in the time-power curve.

[0103] S140: Determine whether the SOC of the power battery is less than the set capacity and whether the average power is not less than the first set power.

[0104] If yes, then execute S150; otherwise, execute S200.

[0105] When the SOC of the power battery is less than the set charge, it indicates that the power battery has the maximum storage capacity. When the SOC of the power battery is not less than the set charge, the SOC of the power battery is between the set charge and the set boundary charge, indicating that the power battery has a large storage capacity. When the average power is not less than the first set power, it indicates that the current vehicle is working under a high load.

[0106] S150: Determine the humidification power of the proton exchange membrane fuel cell as the first execution power.

[0107] When the SOC of the power battery is less than the set charge and the average power is not less than the first set power, it indicates that the remaining chargeable space of the power battery is sufficient and the vehicle is working under a high load. Therefore, the first execution power matched is the maximum power of humidification.

[0108] S160: Determine the first expected temperature based on the first execution power.

[0109] Wherein, when the humidification power is the first execution power, the first expected temperature is the estimated theoretical temperature at which the coolant enters the proton exchange membrane fuel cell. Specifically, the vehicle controller pre-stores a first relationship chart between the first execution power and the first expected temperature, and the corresponding first expected temperature can be retrieved from the first relationship chart based on the first execution power. The first relationship chart can be obtained based on a large number of preliminary experiments.

[0110] S170: Obtain the heat dissipation parameters of the radiator, including the radiator's power and ambient temperature.

[0111] The radiator's power can be obtained from the specific radiator model used. The radiator's power and ambient temperature reflect its heat dissipation capacity under the current ambient temperature. The radiator's power can be obtained by interacting with the vehicle controller, and the ambient temperature can be detected by a temperature sensor.

[0112] S180: The first expected temperature is corrected based on the heat dissipation parameters to obtain the first execution temperature.

[0113] In this embodiment, when the humidification power is the first execution power, the first execution temperature is the time-controlled temperature at which the coolant enters the proton exchange membrane fuel cell. Specifically, in this embodiment, the vehicle controller pre-stores a map1 containing a first predicted temperature, radiator power, ambient temperature, and a first correction coefficient. The first correction coefficient can be retrieved from map1 based on the obtained first predicted temperature, radiator power, and ambient temperature. The first execution temperature is equal to the product of the first correction coefficient and the first predicted temperature. When the coolant enters the proton exchange membrane fuel cell stack at the first execution temperature, the temperature inside the stack can be effectively regulated, and more liquid water can condense inside the stack, increasing the water content and achieving optimal humidification. In this embodiment, map1 can be obtained based on extensive prior experiments.

[0114] In other embodiments, the heat dissipation capacity of the heat sink can be evaluated into multiple levels based on the heat dissipation parameters, and the corresponding execution temperature can be matched with different levels.

[0115] S190: Perform the first high-power humidification operation.

[0116] Performing the first high-power humidification operation includes: the proton exchange membrane fuel cell operating at a first execution power, and controlling the coolant to enter the proton exchange membrane fuel cell at a first execution temperature.

[0117] The control method for a proton exchange membrane fuel cell provided in this embodiment, after determining that humidification is enabled, obtains the state of charge (SOC) of the power battery. Under the premise that there is no vehicle fault error, the humidification mode is evaluated based on the SOC of the power battery. When it is determined that a high-power humidification mode needs to be executed, the average power of the proton exchange membrane fuel cell in the previous set time period is obtained. When the SOC of the power battery is less than the set charge and the average power is not less than the first set power, the humidification power of the proton exchange membrane fuel cell is determined as the first execution power. Based on the first execution power, a first expected temperature is determined, the heat dissipation parameters of the radiator are obtained, the first expected temperature is corrected based on the heat dissipation parameters to obtain the first execution temperature, and the first high-power humidification operation is executed. This includes: the proton exchange membrane fuel cell operates at the first execution power, and the coolant is controlled to enter the proton exchange membrane fuel cell at the first execution temperature. This can significantly increase the condensate in the stack of the proton exchange membrane fuel cell, realize automatic humidification, and also match the current operating conditions of the vehicle.

[0118] Alternatively, please continue to refer to Figure 1 The control method for exchange membrane fuel cells also includes the following steps:

[0119] In S140, if the SOC of the power battery is not less than the set charge, or the average power is less than the first set power, then S200 is executed.

[0120] S200: Determine the humidification power of the proton exchange membrane fuel cell as the second execution power.

[0121] The second execution power is less than the first execution power. When the SOC of the power battery is not less than the set charge or the average power is less than the first set power, it indicates that the remaining chargeable space of the power battery is relatively small, or the vehicle is currently operating under a large load. Therefore, the matched second execution power is also relatively smaller than the first execution power.

[0122] S210: Determine the second expected temperature based on the second execution power.

[0123] Wherein, when the humidification power is the second execution power, the second predicted temperature is the estimated theoretical temperature at which the coolant enters the proton exchange membrane fuel cell. Specifically, the vehicle controller pre-stores a second relationship chart between the second execution power and the second predicted temperature, and the corresponding second predicted temperature can be retrieved from the second relationship chart based on the second execution power. The second relationship chart can be obtained based on a large number of preliminary experiments.

[0124] S220: Obtain the heat dissipation parameters of the radiator, including the radiator's power and ambient temperature.

[0125] S230: The second expected temperature is corrected based on the heat dissipation parameters to obtain the second execution temperature.

[0126] In this embodiment, when the humidification power is the second execution power, the second execution temperature is the time-controlled temperature at which the coolant enters the proton exchange membrane fuel cell. Specifically, in this embodiment, the vehicle controller pre-stores a map2 containing the second predicted temperature, radiator power, ambient temperature, and second correction coefficient. The second correction coefficient can be retrieved from map2 based on the obtained second predicted temperature, radiator power, and ambient temperature. The second execution temperature is equal to the product of the second correction coefficient and the second predicted temperature. When the coolant enters the proton exchange membrane fuel cell stack at the second execution temperature, the temperature inside the stack can be effectively regulated. In this embodiment, map2 can be obtained based on extensive prior experiments.

[0127] S240: Perform the second highest power humidification operation.

[0128] The second high-power humidification operation includes: the proton exchange membrane fuel cell operating at a second power, and controlling the coolant to enter the proton exchange membrane fuel cell at a second temperature.

[0129] When the proton exchange membrane fuel cell operates at the second operating power and the coolant enters the fuel cell at the second operating temperature, the amount of condensate in the stack can be significantly increased, achieving automatic humidification. This also allows for adaptation to the current operating conditions of the vehicle.

[0130] Alternatively, please refer to Figure 2 The control method for a proton exchange membrane fuel cell further includes the following steps:

[0131] If it is determined in S120 that the idle humidification mode will be executed, then S250 will be executed.

[0132] S250: Determine the humidification power of the proton exchange membrane fuel cell as the third execution power.

[0133] Since the vehicle's various parameters are usually at their minimum values ​​at idle, the third execution power can be directly determined. However, in high-power humidification mode, the vehicle can still operate normally, requiring a higher execution power. Therefore, the third execution power is a constant value, and it is less than the second execution power.

[0134] S260: Determine the third expected temperature based on the third execution power.

[0135] In this context, when the humidification power is the third execution power, the third predicted temperature is the estimated theoretical temperature at which the coolant enters the proton exchange membrane fuel cell. Specifically, the vehicle controller pre-stores a third relationship chart between the third execution power and the third predicted temperature, allowing the corresponding third predicted temperature to be retrieved from the chart based on the third execution power. This third relationship chart can be obtained based on extensive preliminary testing.

[0136] S270: Obtain the heat dissipation parameters of the radiator, including the radiator's power and ambient temperature.

[0137] S280: The third predicted temperature is corrected based on the heat dissipation parameters to obtain the third execution temperature.

[0138] In this embodiment, when the humidification power is the third execution power, the third execution temperature is the time-controlled temperature at which the coolant enters the proton exchange membrane fuel cell. Specifically, in this embodiment, the vehicle controller pre-stores a map3 containing the third predicted temperature, radiator power, ambient temperature, and a third correction coefficient. The corresponding third correction coefficient can be retrieved from map3 based on the obtained third predicted temperature, radiator power, and ambient temperature. The third execution temperature is equal to the product of the third correction coefficient and the third predicted temperature. When the coolant enters the proton exchange membrane fuel cell stack at the third execution temperature, the temperature inside the stack can be effectively regulated, and more liquid water can condense inside the stack, increasing the water content and achieving optimal humidification. In this embodiment, map3 can be obtained based on extensive prior experiments.

[0139] S290: Perform idle humidification operation.

[0140] The idling humidification operation includes: the proton exchange membrane fuel cell operating at a third operating power, and controlling the coolant to enter the proton exchange membrane fuel cell at a third operating temperature.

[0141] When the proton exchange membrane fuel cell operates at the third operating power and the coolant is controlled to enter the proton exchange membrane fuel cell at the third operating temperature, the condensate in the stack can be significantly increased, achieving automatic humidification, and can also be matched to the current operating conditions of the vehicle.

[0142] Alternatively, please refer to Figure 3 The control method for a proton exchange membrane fuel cell also includes the following steps following S190, S240, and S290.

[0143] S300: The first duration of the first high-power humidification operation, the second duration of the second high-power humidification operation, and the third duration of the idle humidification operation.

[0144] S310: Determine a first correction coefficient based on a first execution power, determine a second correction coefficient based on a second execution power, and determine a third correction coefficient based on a third execution power.

[0145] Please refer to Table 1. The vehicle controller has a pre-stored chart of the corresponding execution power and correction coefficient. The corresponding correction coefficient can be queried from the chart by the execution power.

[0146] Table 1: Correspondence between Execution Power and Correction Factor

[0147]

[0148]

[0149] S320: Calculate the total humidification time.

[0150] Total humidification time = First correction factor * First duration + Second correction factor * Second duration + Third correction factor * Third duration.

[0151] It should be noted that as the power output increases, the amount of liquid water generated within the proton exchange membrane fuel cell stack will also increase, and the automatic humidification capability will also increase. Therefore, by adjusting the humidification time at the corresponding power output using different coefficients, it is easier to evaluate the overall completion of humidification.

[0152] S330: Determine whether the total humidification time exceeds the set time.

[0153] If not, execute S340; if yes, stop humidification enable.

[0154] When the total humidification time exceeds the set time, humidification is considered to be enabled. At this point, humidification can be disabled and the normal control mode of the exchange membrane fuel cell can be entered.

[0155] S340: Determine whether a shutdown command has been received;

[0156] If not, repeat S110; if yes, stop humidification.

[0157] If the total humidification time does not exceed the set time and no shutdown command is received, S110 is executed again to continue enabling humidification. If a shutdown command is received, it may be due to driver intervention or other vehicle shutdown conditions. In this case, the shutdown command is executed first, and humidification is deactivated.

[0158] Through steps S300 to S340, the three different humidification operations can be measured by a unified standard. Then, by judging whether the total humidification time exceeds the set time, it is determined whether the humidification enable has met the time requirement. When the time is insufficient and no shutdown command is obtained, step S110 is repeated to realize the control cycle. In this way, the three humidification operations can be switched according to the change of the SOC of the power battery.

[0159] Example 2

[0160] Embodiment 2 of the present invention provides a control device for the proton exchange membrane fuel cell, which can execute the control method for the proton exchange membrane fuel cell described in the above embodiments.

[0161] Specifically, please refer to Figure 4The control device for the proton exchange membrane fuel cell includes an enable determination module 110, a state of charge (SOC) acquisition module 120, a humidification mode determination module 130, an average power acquisition module 140, a judgment module 150, a first execution power determination module 160, a first expected temperature determination module 170, a heat dissipation parameter acquisition module 180, a first execution temperature determination module 190, and an execution module 200.

[0162] The system includes: an enable determination module 110 for determining humidification enable; a SOC acquisition module 120 for acquiring the SOC of the power battery; a humidification mode determination module 130 for evaluating the humidification mode based on the SOC of the power battery, assuming no vehicle malfunctions; an average power acquisition module 140 for acquiring the average power of the proton exchange membrane fuel cell over a previously set time period when a high-power humidification mode is required; a judgment module 150 for determining whether the SOC of the power battery is less than a set charge and whether the average power is not less than a first set power; and a first execution power determination module 160 for determining whether the SOC of the power battery is less than a set charge and whether the average power is not less than a first set power. When the set power is not less than the first set power, the humidification power of the proton exchange membrane fuel cell is determined as the first execution power; the first expected temperature determination module 170 is used to determine the first expected temperature based on the first execution power; the heat dissipation parameter acquisition module 180 is used to acquire the heat dissipation parameters of the radiator; the first execution temperature determination module 190 is used to correct the first expected temperature based on the heat dissipation parameters and obtain the first execution temperature; the execution module 200 is used to perform the first high-power humidification operation, specifically, the proton exchange membrane fuel cell operates at the first execution power, and the coolant is controlled to enter the proton exchange membrane fuel cell at the first execution temperature.

[0163] The control device for the proton exchange membrane fuel cell provided in this embodiment determines humidification enable through an enable determination module 110; acquires the SOC of the power battery through a SOC acquisition module 120; evaluates the humidification mode based on the SOC of the power battery through a humidification mode determination module 130, assuming no vehicle malfunctions; when it is determined that a high-power humidification mode needs to be executed, acquires the average power of the proton exchange membrane fuel cell over a previously set time period through an average power acquisition module 140; determines through a judgment module 150 whether the SOC of the power battery is less than a set charge and whether the average power is not less than a first set power; when the SOC of the power battery is less than the set charge and the average power is not less than the first set power, a first execution power determination is performed. Module 160 determines the humidification power of the proton exchange membrane fuel cell as the first execution power; module 170 determines the first expected temperature based on the first execution power; module 180 obtains the heat dissipation parameters of the radiator; module 190 corrects the first expected temperature based on the heat dissipation parameters and obtains the first execution temperature; and module 200 executes the first high-power humidification operation. Specifically, the proton exchange membrane fuel cell operates at the first execution power, and the coolant is controlled to enter the proton exchange membrane fuel cell at the first execution temperature, which can significantly increase the amount of condensate in the stack of the proton exchange membrane fuel cell, realize automatic humidification, and match the current operating conditions of the vehicle.

[0164] Optionally, the control device for the proton exchange membrane fuel cell also includes:

[0165] The second execution power determination module is used to determine the humidification power of the proton exchange membrane fuel cell as the second execution power when the SOC of the power battery is not less than the set charge or the average power is less than the first set power. The second execution power is less than the first execution power.

[0166] The second predicted temperature determination module is used to determine the second predicted temperature based on the second execution power.

[0167] The second execution temperature determination module is used to correct the second expected temperature based on the heat dissipation parameters and obtain the second execution temperature.

[0168] The second high-power humidification operation execution module is used to perform the second high-power humidification operation, including: the proton exchange membrane fuel cell operates at a second execution power, and controls the coolant to enter the proton exchange membrane fuel cell at a second execution temperature.

[0169] Optionally, the control device for the proton exchange membrane fuel cell also includes:

[0170] The third execution power determination module is used to determine the humidification power of the proton exchange membrane fuel cell as the third execution power when it is determined that the idle humidification mode needs to be executed.

[0171] The third predicted temperature determination module is used to determine the third predicted temperature based on the third execution power.

[0172] The third execution temperature determination module is used to correct the third expected temperature based on the heat dissipation parameters and obtain the third execution temperature.

[0173] The idling humidification operation execution module is used to perform idling humidification operation, including: the proton exchange membrane fuel cell operates at a third execution power, and the coolant is controlled to enter the proton exchange membrane fuel cell at a third execution temperature.

[0174] Optionally, the control device for the proton exchange membrane fuel cell also includes:

[0175] The duration accumulation module is used to accumulate the first duration of executing the first high-power humidification operation, the second duration of executing the second high-power humidification operation, and the third duration of executing the idle humidification operation.

[0176] The coefficient determination module is used to determine a first correction coefficient based on a first execution power, a second correction coefficient based on a second execution power, and a third correction coefficient based on a third execution power.

[0177] The total time calculation module is used to calculate the total humidification time. The total humidification time = first correction factor * first duration + second correction factor * second duration + third correction factor * third duration.

[0178] The timeout detection module is used to determine whether the total humidification time exceeds the set time.

[0179] The shutdown judgment module is used to determine whether a shutdown command has been received when the total humidification time has not exceeded the set time.

[0180] The enable / exit module is used to exit humidification when the total humidification time exceeds the set time or when a shutdown command is received.

[0181] The SOC acquisition module 120 is also used to acquire the SOC of the power battery when no power-off command is received.

[0182] This configuration allows for the accumulation of the first duration of the first high-power humidification operation, the second duration of the second high-power humidification operation, and the third duration of the idle humidification operation via a duration accumulation module. A coefficient determination module then determines a first correction coefficient based on the first execution power, a second correction coefficient based on the second execution power, and a third correction coefficient based on the third execution power. The total humidification time is then calculated as: Total Humidification Time = First Correction Coefficient * First Duration + Second Correction Coefficient * Second Duration + Third Correction Coefficient * Third Duration. This ensures that the three different humidification operations are measured using a unified standard. A timeout judgment module checks if the total humidification time exceeds the set time to determine if the humidification enable has met the time requirement. Furthermore, if the time is insufficient and the shutdown judgment module has not received a shutdown command, the SOC acquisition module repeatedly retrieves the SOC of the power battery. Thus, switching between the three humidification operations can be performed based on changes in the SOC of the power battery.

[0183] Example 3

[0184] like Figure 5 As shown, this embodiment three provides a vehicle including a power battery 10, a proton exchange membrane fuel cell 20, a vehicle controller 30, a temperature sensor 40, and a memory 50. The power battery 10, proton exchange membrane fuel cell 20, vehicle controller 30, temperature sensor 40, and memory 50 can be connected via a bus or other means. Figure 5 Taking a bus connection as an example, temperature sensor 40 is used to detect the ambient temperature and send the detected ambient temperature to the vehicle controller 30.

[0185] The memory 50, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the control method of the proton exchange membrane fuel cell in the embodiments of the present invention. The vehicle controller 30 executes various vehicle functions and data processing by running the software programs, instructions, and modules stored in the memory 50, thereby realizing the control method of the proton exchange membrane fuel cell in the above embodiments.

[0186] The memory 50 primarily includes a program storage area and a data storage area. The program storage area stores the operating system and at least one application program required for a given function; the data storage area stores data created based on terminal usage. Furthermore, the memory 50 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory, or other non-volatile solid-state storage device. In some instances, the memory 50 may further include memory remotely configured relative to the vehicle controller 30, which can be connected to the vehicle via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0187] The vehicle provided in Embodiment 3 of the present invention and the control method of the proton exchange membrane fuel cell provided in the above embodiments belong to the same inventive concept. Technical details not described in detail in this embodiment can be found in the above embodiments. Furthermore, this embodiment has the same beneficial effects as the control method of the proton exchange membrane fuel cell.

[0188] Example 4

[0189] Embodiment 4 of the present invention also provides a storage medium storing a computer program thereon, which, when executed by a vehicle controller, enables the vehicle to implement the control method of the proton exchange membrane fuel cell as described in the above embodiments of the present invention.

[0190] Of course, the computer-executable instructions provided in the embodiments of the present invention are not limited to the operations in the control method of the proton exchange membrane fuel cell as described above, but can also execute related operations in the control method of the proton exchange membrane fuel cell provided in the embodiments of the present invention, and have corresponding functions and beneficial effects.

[0191] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented using software and necessary general-purpose hardware, and of course, it can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a robot, personal computer, server, or network device, etc.) to execute the control method for the proton exchange membrane fuel cell described in the various embodiments of the present invention.

[0192] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A control method for a proton exchange membrane fuel cell, characterized in that, include: S100: Determines humidification enable; S110: Obtain the SOC of the power battery; S120: Under the premise that there is no fault report in the vehicle, evaluate the humidification mode based on the SOC of the power battery. The humidification mode includes a high-power humidification mode and an idle humidification mode. The humidification power of the proton exchange membrane fuel cell in the high-power humidification mode is greater than the humidification power of the proton exchange membrane fuel cell in the idle humidification mode. If it is determined that a high-power humidification mode needs to be executed, then execute S130; S130: Obtain the average power of the proton exchange membrane fuel cell over a previously set time period; S140: Determine whether the SOC of the power battery is less than a set charge and whether the average power is not less than a first set power; If so, then execute S150; S150: Determine the humidification power of the proton exchange membrane fuel cell as the first execution power; S160: Determine the first expected temperature based on the first execution power; S170: Obtain the heat dissipation parameters of the radiator, including the power of the radiator and the ambient temperature; S180: Based on the heat dissipation parameters, the first expected temperature is corrected to obtain the first execution temperature; S190: Perform a first high-power humidification operation, including: the proton exchange membrane fuel cell operates at the first execution power, and controls the coolant to enter the proton exchange membrane fuel cell at the first execution temperature; The humidification modes for SOC evaluation based on the aforementioned power battery include: When the SOC of the power battery is between the set upper limit and the set boundary, the idle humidification mode is determined to be executed. When the SOC of the power battery is less than the set boundary charge, the high-power humidification mode is determined to be executed. The upper limit power consumption is greater than the set boundary power consumption, and the set boundary power consumption is greater than the set power consumption. Determining the humidification enablement includes: To obtain the internal humidity of a proton exchange membrane fuel cell; Determine whether the internal humidity is lower than the set humidity; If so, determine whether the SOC of the power battery is less than the set enable capacity; If yes, then humidification is enabled; otherwise, the power battery is consumed until the SOC of the power battery is less than the set enable power.

2. The control method for a proton exchange membrane fuel cell according to claim 1, characterized in that, In S140, if the SOC of the power battery is not less than a set charge, or the average power is less than a first set power, then S200 is executed. S200: Determine the humidification power of the proton exchange membrane fuel cell as the second execution power, where the second execution power is less than the first execution power; S210: Determine the second expected temperature based on the second execution power; S220: Obtain the heat dissipation parameters of the radiator, including the power of the radiator and the ambient temperature; S230: Based on the heat dissipation parameters, the second predicted temperature is corrected to obtain the second execution temperature; S240: Perform a second high-power humidification operation, including: the proton exchange membrane fuel cell operating at the second power, and controlling the coolant to enter the proton exchange membrane fuel cell at the second temperature.

3. The control method for a proton exchange membrane fuel cell according to claim 2, characterized in that, If it is determined in S120 that the idle speed humidification mode is to be executed, then S250 is executed. S250: Determine the humidification power of the proton exchange membrane fuel cell as the third execution power; S260: Determine the third expected temperature based on the third execution power; S270: Obtain the heat dissipation parameters of the radiator, including the power of the radiator and the ambient temperature; S280: Based on the heat dissipation parameters, the third predicted temperature is corrected to obtain the third execution temperature; S290: Performing an idle humidification operation, including: the proton exchange membrane fuel cell operating at the third execution power, and controlling the coolant to enter the proton exchange membrane fuel cell at the third execution temperature.

4. The control method for a proton exchange membrane fuel cell according to claim 3, characterized in that, The control method for the proton exchange membrane fuel cell further includes steps following S190, S240, and S290: S300: Accumulate the first duration of executing the first high-power humidification operation, accumulate the second duration of executing the second high-power humidification operation, and accumulate the third duration of executing the idle humidification operation; S310: Determine a first correction coefficient based on the first execution power, determine a second correction coefficient based on the second execution power, and determine a third correction coefficient based on the third execution power; S320: Calculate the total humidification time; Total humidification time = First correction factor * First duration + Second correction factor * Second duration + Third correction factor * Third duration; S330: Determine whether the total humidification time exceeds the set time; If not, then execute S340; S340: Determine whether a shutdown command has been received; If not, repeat S110.

5. The control method for a proton exchange membrane fuel cell according to claim 4, characterized in that, In S330, if the total humidification time exceeds the set time, and in S340, a shutdown command is obtained; Then stop humidification to enable power.

6. A control device for a proton exchange membrane fuel cell, characterized in that, include: Enable determination module, used to determine humidification enable; The SOC acquisition module is used to acquire the SOC of the power battery. The humidification mode determination module is used to evaluate the humidification mode based on the SOC of the power battery under the premise that there is no fault error in the vehicle. The humidification mode includes a high-power humidification mode and an idle humidification mode. The humidification power of the proton exchange membrane fuel cell in the high-power humidification mode is greater than the humidification power of the proton exchange membrane fuel cell in the idle humidification mode. The average power acquisition module is used to acquire the average power of the proton exchange membrane fuel cell over a previously set time period when it is determined that a high-power humidification mode needs to be executed. The judgment module is used to determine whether the SOC of the power battery is less than a set charge and whether the average power is not less than a first set power. The first execution power determination module is used to determine the humidification power of the proton exchange membrane fuel cell as the first execution power when the SOC of the power battery is less than the set charge and the average power is not less than the first set power. The first predicted temperature determination module is used to determine the first predicted temperature based on the first execution power; A heat dissipation parameter acquisition module is used to acquire the heat dissipation parameters of the radiator, including the power of the radiator and the ambient temperature. The first execution temperature determination module is used to correct the first expected temperature based on the heat dissipation parameters and obtain the first execution temperature; An execution module is used to perform a first high-power humidification operation, including: the proton exchange membrane fuel cell operating at the first execution power, and controlling the coolant to enter the proton exchange membrane fuel cell at the first execution temperature.

7. A vehicle comprising a power battery and a proton exchange membrane fuel cell, characterized in that, The vehicle also includes: Vehicle controller; A temperature sensor is used to detect the ambient temperature and send the detected ambient temperature to the vehicle controller; Memory, used to store one or more programs; When the one or more programs are executed by the vehicle controller, the vehicle controller controls the vehicle to implement the control method for a proton exchange membrane fuel cell as described in any one of claims 1-5.

8. A storage medium having a computer program stored thereon, characterized in that, When the program is executed by the vehicle controller, the vehicle implements the control method for the proton exchange membrane fuel cell as described in any one of claims 1-5.

Images