Purging control method, device and equipment of fuel cell, medium and product

Abstract

The invention discloses a purging control method, device and equipment of a fuel cell, a medium and a product. The method comprises the following steps: acquiring shutdown operation parameters of a fuel cell engine system in a cold shutdown process; determining an electrochemical alternating current impedance expected value according to target operation parameters in the shutdown operation parameters, wherein the target operation parameters at least comprise electric pile operation time, pile-out air humidity, environment temperature and pile-out cooling liquid temperature; and determining a purging control parameter of target equipment in the fuel cell engine system based on the shutdown operation parameter and the electrochemical alternating current impedance expected value. According to the technical scheme, multiple factors such as the electric pile running time, the pile outlet air humidity, the environment temperature and the pile outlet cooling liquid temperature are considered in the process of determining the electrochemical alternating-current impedance expected value, the accuracy of the determined electrochemical alternating-current impedance expected value is high, and then the effect of conducting purging control based on the electrochemical alternating-current impedance expected value is improved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of fuel cell technology, and in particular to a fuel cell purge control method, device, equipment, medium and product. Background Art

[0002] After a fuel cell engine is cold shut down, if there is a high amount of residual water inside the stack, there may be a risk of freezing the stack, which will affect the performance and safety of the next startup. Therefore, under the condition of cold shutdown of the fuel cell, effective purge control is required to control the water content inside the stack.

[0003] In the prior art, the electrochemical AC impedance required for the next start of a fuel cell engine after shutdown and purging can be determined by the ambient temperature, and the purging can be controlled based on the electrochemical AC impedance required for the next start. This method only considers the effect of the ambient temperature on the electrochemical AC impedance in the fuel cell stack, and the determined electrochemical AC impedance required for the next start is not accurate enough, resulting in an unsatisfactory effect of the purge control of the fuel cell. Summary of the invention

[0004] The present invention provides a fuel cell purge control method, device, equipment, medium and product, which can improve the purge control effect of the fuel cell.

[0005] In a first aspect, an embodiment of the present invention provides a fuel cell purge control method, comprising:

[0006] Obtaining shutdown operation parameters of the fuel cell engine system during cold shutdown;

[0007] Determine an expected value of electrochemical AC impedance according to a target operating parameter in the shutdown operating parameter, wherein the target operating parameter includes at least a stack operating time, an outlet air humidity, an ambient temperature, and an outlet coolant temperature;

[0008] Based on the shutdown operation parameter and the expected electrochemical AC impedance value, a purge control parameter of a target device in the fuel cell engine system is determined.

[0009] In a second aspect, an embodiment of the present invention provides a purge control device for a fuel cell, comprising:

[0010] An acquisition module, used to acquire shutdown operation parameters of the fuel cell engine system during a cold shutdown process;

[0011] An impedance determination module, used to determine an expected value of electrochemical AC impedance according to target operating parameters in the shutdown operating parameters, wherein the target operating parameters at least include stack operation time, stack air humidity, ambient temperature, and stack coolant temperature;

[0012] The purge control module is used to determine the purge control parameters of the target device in the fuel cell engine system based on the shutdown operation parameters and the expected value of the electrochemical AC impedance.

[0013] In a third aspect, an embodiment of the present invention provides an electronic device, including:

[0014] at least one processor; and

[0015] a memory communicatively connected to the at least one processor; wherein,

[0016] 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 method according to the first aspect.

[0017] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method described in the first aspect when executed.

[0018] In a fifth aspect, an embodiment of the present invention provides a computer program product, wherein the computer program product comprises a computer program, and when the computer program is executed by a processor, the method as described in the first aspect is implemented.

[0019] The embodiment of the present invention provides a fuel cell purge control method, device, equipment, medium and product, the method comprising: obtaining the shutdown operation parameters of the fuel cell engine system during the cold shutdown process; determining the expected value of electrochemical AC impedance according to the target operation parameters in the shutdown operation parameters, the target operation parameters at least including the operation time of the stack, the air humidity out of the stack, the ambient temperature and the coolant temperature out of the stack; based on the shutdown operation parameters and the expected value of electrochemical AC impedance, determining the purge control parameters of the target device in the fuel cell engine system. The above technical scheme takes into account multiple factors such as the operation time of the stack, the air humidity out of the stack, the ambient temperature and the coolant temperature out of the stack in the process of determining the expected value of electrochemical AC impedance, and the accuracy of the determined expected value of electrochemical AC impedance is high, thereby improving the effect of purge control based on the expected value of electrochemical AC impedance.

[0020] 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

[0021] 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.

[0022] Figure 1 is a flow chart of a fuel cell purge control method provided according to Embodiment 1 of the present invention;

[0023] Figure 2 is a flow chart of a fuel cell purge control method provided according to Embodiment 2 of the present invention;

[0024] Figure 3 is a structural schematic diagram of a purge control device for a fuel cell provided according to Embodiment 3 of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of an electronic device implementing an embodiment of the present invention. DETAILED DESCRIPTION

[0026] 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.

[0027] It should be noted that the terms "first", "second", etc. in the present invention 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.

[0028] Embodiment 1

[0029] Figure 1This is a flow chart of a fuel cell purge control method provided according to Embodiment 1 of the present invention. This embodiment is applicable to the case of implementing purge control of a fuel cell engine system during cold shutdown. The method can be executed by a fuel cell purge control device, which can be implemented in the form of software and / or hardware and integrated in an electronic device. Further, the electronic device includes but is not limited to: computers, laptops, etc.

[0030] like Figure 1 As shown, the method includes:

[0031] S110, obtaining shutdown operation parameters of the fuel cell engine system during the cold shutdown process.

[0032] A fuel cell engine system can be understood as a system that converts chemical energy into electrical energy. Fuel cell engine systems are usually used in vehicle power systems and generate electrical energy through the chemical reaction of hydrogen and oxygen, with water and heat as byproducts.

[0033] In the embodiment of the present invention, the fuel cell engine system may include but is not limited to the following equipment: a fuel cell controller, a fuel cell stack, an air compressor, a water pump, a fan, a thermostat, a drain valve, a high-frequency impedance acquisition device, an air humidity sensor out of the stack, a coolant temperature sensor in the stack, a coolant temperature sensor out of the stack, and an ambient temperature sensor. Among them, the high-frequency impedance acquisition device can acquire the electrochemical AC impedance of the stack, in Ω.

[0034] The cold shutdown process of the fuel cell engine system can be understood as the process of the fuel cell engine system transitioning from a working state to a stationary state in a low temperature environment, wherein the low temperature environment can be understood as a temperature lower than a set temperature threshold.

[0035] The shutdown operating parameters may be a series of parameters monitored and recorded by the fuel cell engine system during the cold shutdown process, such as parameters collected by equipment in the fuel cell engine system, and parameters related to the operating time of the fuel cell engine system, which are not limited here.

[0036] In this step, the electronic device can communicate with the fuel cell engine system, and obtain shutdown operation parameters from the fuel cell engine system in real time during the cold shutdown of the fuel cell engine system. The communication method between the electronic device and the fuel cell engine system is not limited.

[0037] S120, determining an expected value of electrochemical AC impedance according to target operating parameters in the shutdown operating parameters, wherein the target operating parameters at least include stack operating time, stack outlet air humidity, ambient temperature, and stack outlet coolant temperature.

[0038] The target operating parameter may be a parameter in the shutdown operating parameter used to determine the expected value of electrochemical AC impedance. The expected value of electrochemical AC impedance may be the value of electrochemical AC impedance that is expected to correspond to the next cold start of the fuel cell engine system.

[0039] The target operating parameters include at least the stack operating time, the air humidity out of the stack, the ambient temperature and the coolant temperature out of the stack. Among them, the stack operating time can be the cumulative operating time of the fuel cell stack from start to stop; the air humidity out of the stack can be the humidity of the air discharged from the stack, which can be collected by the air humidity sensor out of the stack; the ambient temperature can be the temperature of the environment corresponding to the fuel cell engine system, which can be collected by the ambient temperature sensor; the coolant temperature out of the stack can be the temperature of the coolant flowing out of the stack, which can be collected by the coolant temperature sensor out of the stack.

[0040] In this step, the expected value of electrochemical AC impedance can be determined based on the operation time of the battery stack, the air humidity out of the stack, the ambient temperature and the coolant temperature out of the stack. In the first case, if the operation time of the battery stack is longer, the purge time should be appropriately extended, which corresponds to a larger AC impedance; but if the air humidity out of the stack is low at this time, it is necessary to ensure that the purge time is shortened to avoid damage to the proton exchange membrane due to too little water in the battery stack, which corresponds to a smaller AC impedance. In the second case, it is necessary to consider the effect of the ambient temperature on the freezing of liquid water in the battery stack after the shutdown, that is, the lower the ambient temperature, the longer the purge time should be, which corresponds to a larger AC impedance; at the same time, if the coolant temperature out of the stack is high, the gaseous water content in the battery stack is large, and the premature shutdown will cause the liquid water in the battery stack to accumulate and then freeze, so the purge time should be extended, which corresponds to a larger AC impedance. Combining the above two situations, the final expected value of electrochemical AC impedance can be determined.

[0041] In one embodiment, determining the expected value of electrochemical AC impedance according to the target operating parameter in the shutdown operating parameter includes:

[0042] Determine a first candidate electrochemical alternating current impedance based on the operation time of the battery stack and the air humidity out of the stack;

[0043] Determining a second candidate electrochemical alternating current impedance based on the stack operation time, the ambient temperature and the stack exit coolant temperature;

[0044] An expected electrochemical alternating current impedance value is determined based on the first candidate electrochemical alternating current impedance and the second candidate electrochemical alternating current impedance.

[0045] The first candidate electrochemical impedance IMP1 can be determined by the following formula:

[0046] IMP1 = 7.3 × 10 -2+2.76×10 -3 ×Hout+1.26×10 -4 ×Trun

[0047] Among them, Trun is the operation time of the stack, in seconds; Hout is the air humidity out of the stack, in %.

[0048] The second candidate electrochemical impedance IMP2 can be determined by the following formula:

[0049] IMP2=0.26-8.98×10 -3 ×TMenv+1.74×10 -3 ×Trun-2.85×10 -5 ×TMenv 2

[0050] -1.38×10 -6 ×TMwout×TMenv+7.46×10 -7 ×TMwout 2

[0051] Wherein, TMenv is the ambient temperature in °C; TMwout is the coolant temperature out of the reactor in °C.

[0052] In one embodiment, determining the expected value of electrochemical AC impedance based on the first candidate electrochemical AC impedance and the second candidate electrochemical AC impedance includes: determining the maximum value of the first candidate electrochemical AC impedance and the second candidate electrochemical AC impedance as the expected value of electrochemical AC impedance. That is, the maximum value of the first candidate electrochemical AC impedance IMP1 and the second candidate electrochemical AC impedance IMP2 can be determined as the expected value of electrochemical AC impedance by an algorithm for determining the maximum value.

[0053] S130: Determine a purge control parameter of a target device in the fuel cell engine system based on the shutdown operation parameter and the expected electrochemical AC impedance value.

[0054] The target device may be a device involved in purge control in a fuel cell engine system, and the purge control parameter may be a parameter corresponding to the target device when performing purge control.

[0055] Exemplarily, the target device is an air compressor, and the corresponding purge control parameter is the air compressor speed, in revolutions per minute; the target device is a drain valve, and the corresponding purge control parameter is the drain valve closing time, that is, from the current moment, run the drain valve closing time, such as after running for 20 seconds, open the drain valve; the target device is a fan, and the corresponding purge control parameter is the fan opening, in %; the target device is a thermostat, and the corresponding purge control parameter is the thermostat opening, in %; the target device is a water pump, and the corresponding purge control parameter is the water pump speed, in revolutions per minute.

[0056] In this step, closed-loop control can be performed based on the impedance deviation between the expected electrochemical AC impedance value and the measured electrochemical AC impedance value included in the shutdown operation parameters, so that the measured electrochemical AC impedance value is continuously close to the expected electrochemical AC impedance value, and the purge control parameters of each target device in the fuel cell engine system are obtained. The measured electrochemical AC impedance value can be the electrochemical AC impedance actually collected by the high-frequency impedance collection device.

[0057] The embodiment of the present invention provides a fuel cell purge control method, device, equipment, medium and product, the method comprising: obtaining the shutdown operation parameters of the fuel cell engine system during the cold shutdown process; determining the expected value of electrochemical AC impedance according to the target operation parameters in the shutdown operation parameters, the target operation parameters at least including the operation time of the stack, the air humidity out of the stack, the ambient temperature and the coolant temperature out of the stack; based on the shutdown operation parameters and the expected value of electrochemical AC impedance, determining the purge control parameters of the target device in the fuel cell engine system. The above technical scheme takes into account multiple factors such as the operation time of the stack, the air humidity out of the stack, the ambient temperature and the coolant temperature out of the stack in the process of determining the expected value of electrochemical AC impedance, and the accuracy of the determined expected value of electrochemical AC impedance is high, thereby improving the effect of purge control based on the expected value of electrochemical AC impedance.

[0058] Embodiment 2

[0059] Figure 2 This is a flow chart of a fuel cell purge control method provided according to Example 2 of the present invention. This embodiment is based on the above-mentioned Example 1, with the target parameters being an air compressor, a drain valve, a fan, a thermostat, and a water pump as the basis, and further refines the purge control parameters of the target equipment in the fuel cell engine system based on the shutdown operating parameters and the expected value of the electrochemical AC impedance.

[0060] like Figure 2 As shown, the method includes:

[0061] S201. Obtain shutdown operation parameters of a fuel cell engine system during a cold shutdown process.

[0062] S202. Determine an expected value of electrochemical alternating current impedance according to a target operating parameter in the shutdown operating parameter.

[0063] After S202, the following five situations are implemented:

[0064] Case 1: The purge control parameters of the air compressor, that is, the determination of the air compressor speed, correspond to the following S203-S206.

[0065] S203, obtaining a compressor speed feedforward value by looking up a table based on the expected electrochemical AC impedance value.

[0066] Among them, the air compressor speed feedforward value can be a pre-set air compressor speed that should be used to achieve the expected value of electrochemical AC impedance. In practical applications, the first mapping relationship table can be set in advance according to actual needs. The first mapping relationship table can indicate the correspondence between the expected value of electrochemical AC impedance and the air compressor speed feedforward value, that is, each expected value of electrochemical AC impedance in the first mapping relationship table has a unique corresponding air compressor speed feedforward value. Table 1 is an exemplary description of the first mapping relationship table. As shown in Table 1, based on any expected value of electrochemical AC impedance, the corresponding air compressor speed feedforward value can be determined by looking up the table.

[0067] Table 1 First mapping relationship table

[0068]

[0069] S204, determining an impedance deviation between the expected electrochemical alternating current impedance value and the actual electrochemical alternating current impedance value included in the shutdown operation parameters.

[0070] The impedance deviation is the deviation between the expected value of electrochemical AC impedance and the measured value of electrochemical AC impedance.

[0071] S205: Using the impedance deviation as an input of an air compressor speed controller to determine a first output result of the air compressor speed controller.

[0072] In the embodiment of the present invention, the parameters of the fuel cell engine system can be adjusted by a proportional-integral controller (PI controller) to achieve the expected value of the electrochemical AC impedance. The air compressor speed controller is a PI controller for adjusting the speed of the air compressor.

[0073] The impedance deviation is used as the input of the air compressor speed controller to obtain the output corresponding to the proportional part and the output corresponding to the integral part of the air compressor speed controller, and the combination of the two is the first output result of the air compressor speed controller. Among them, the proportional coefficient of the proportional part is a positive value, and the integral coefficient of the integral part is a positive value.

[0074] S206: Determine the air compressor speed of the air compressor based on the sum of the air compressor speed feedforward value and the first output result.

[0075] In this step, the sum of the air compressor speed feedforward value and the first output result is used as the air compressor speed of the air compressor.

[0076] Case 2: The purge control parameters of the drain valve, that is, the determination of the drain valve closing time, correspond to the following S207-S210.

[0077] S207, obtaining a drain valve closing time feedforward value by looking up a table based on the expected value of the electrochemical AC impedance.

[0078] Among them, the drain valve closing time feedforward value can be a pre-set drain valve closing time that should be used to achieve the expected value of electrochemical AC impedance. The drain valve closing time is from the current moment. The drain valve closing time runs for 20 seconds and then the drain valve is opened.

[0079] In practical applications, the second mapping relationship table can be set in advance according to actual needs. The second mapping relationship table can indicate the correspondence between the expected electrochemical AC impedance value and the drain valve closing time feedforward value, that is, each electrochemical AC impedance expected value in the second mapping relationship table has a unique corresponding drain valve closing time feedforward value. Table 2 is an exemplary description of the second mapping relationship table. As shown in Table 2, based on any of the expected electrochemical AC impedance values, the corresponding drain valve closing time feedforward value can be determined by looking up the table.

[0080] Table 2 Second mapping relationship table

[0081]

[0082] S208, determining an impedance deviation between the expected electrochemical alternating current impedance value and the actual electrochemical alternating current impedance value included in the shutdown operation parameters.

[0083] The impedance deviation is the deviation between the expected value of electrochemical AC impedance and the measured value of electrochemical AC impedance.

[0084] S209: Using the impedance deviation as an input of a drain valve closing time controller to determine a second output result of the drain valve closing time controller.

[0085] The drain valve closing time controller is a PI controller used to adjust the closing time of the drain valve. The impedance deviation is used as the input of the drain valve closing time controller to obtain the output corresponding to the proportional part and the output corresponding to the integral part of the drain valve closing time controller. The combination of the two is the second output result of the drain valve closing time controller. Among them, the proportional coefficient of the proportional part is a negative value, and the integral coefficient of the integral part is a negative value.

[0086] S210. Determine the drain valve closing time of the drain valve based on the sum of the drain valve closing time feedforward value and the second output result.

[0087] In this step, the sum of the drain valve closing time feedforward value and the second output result is used as the drain valve closing time of the drain valve.

[0088] Case 3: The fan purge control parameter, that is, the determination of the fan opening, corresponds to the following S211.

[0089] S211. Obtain the fan opening of the fan by looking up a table based on the outlet coolant temperature included in the shutdown operation parameters.

[0090] Taking the cold shutdown time into consideration, the liquid water in the stack should be purged out quickly, and the cooling system in the fuel cell engine system should cooperate to quickly lower the temperature in the stack to achieve the transformation of gaseous water into liquid water.

[0091] Among them, the fan opening can be understood as the ability of the fan to inhale or exhaust air when running. In practical applications, the third mapping relationship table can be set in advance according to actual needs. The third mapping relationship table can indicate the corresponding relationship between the stack coolant temperature and the fan opening, that is, each stack coolant temperature in the third mapping relationship table has a unique corresponding fan opening. Table 3 is an exemplary description of the third mapping relationship table. As shown in Table 3, based on any of the stack coolant temperatures, the corresponding fan opening can be determined by looking up the table.

[0092] Table 3 The third mapping relationship table

[0093]

[0094] Case 4: The purge control parameter of the thermostat, that is, the determination of the thermostat opening, corresponds to the following S212.

[0095] S212: Obtain the thermostat opening of the thermostat by looking up a table based on the out-of-stack coolant temperature included in the shutdown operation parameters.

[0096] Among them, the size of the thermostat opening can determine the flow rate of the coolant from the engine to the radiator. In practical applications, the fourth mapping relationship table can be set in advance according to actual needs. The fourth mapping relationship table can indicate the corresponding relationship between the stack coolant temperature and the thermostat opening, that is, each stack coolant temperature in the fourth mapping relationship table has a unique corresponding thermostat opening. Table 4 is an exemplary description of the fourth mapping relationship table. As shown in Table 4, based on any of the stack coolant temperatures, the corresponding thermostat opening can be determined by looking up the table.

[0097] Table 4 Fourth mapping relationship table

[0098]

[0099] Case 5: The purge control parameter of the water pump, that is, the determination of the water pump speed, corresponds to the following S213.

[0100] S213: Determine a water pump speed of the water pump based on the coolant outlet temperature and the coolant inlet temperature included in the shutdown operation parameters.

[0101] The inlet coolant temperature may be the temperature of the coolant flowing into the stack, which may be acquired by an inlet coolant temperature sensor. In this step, the water pump speed may be determined based on the temperature difference between the outlet coolant temperature and the inlet coolant temperature.

[0102] In one embodiment, determining the water pump speed of the water pump based on the outgoing coolant temperature and the incoming coolant temperature included in the shutdown operation parameters includes:

[0103] Determining a temperature difference between the outgoing coolant temperature and the incoming coolant temperature;

[0104] The water pump speed of the water pump is obtained by looking up a table based on the temperature difference.

[0105] In practical applications, the fifth mapping relationship table can be set in advance according to actual needs. The fifth mapping relationship table can indicate the corresponding relationship between the temperature difference between the stack coolant temperature and the inlet coolant temperature and the water pump speed, that is, each temperature difference in the fifth mapping relationship table has a unique corresponding water pump speed. Table 5 is an exemplary description of the fifth mapping relationship table. As shown in Table 5, the corresponding water pump speed can be determined by looking up the table based on any temperature difference.

[0106] Table 5 Fifth mapping relationship table

[0107] Temperature difference 0 2 4 6 10 15 20 Pump speed 0 2000 3000 5000 6000 8000 10000

[0108] It should be noted that the corresponding relationships recorded in the above-mentioned mapping relationship tables can be adaptively adjusted according to different working conditions and are not limited here.

[0109] The technical solution of the embodiment of the present invention performs closed-loop control based on the impedance deviation between the expected value of electrochemical AC impedance and the actual value of electrochemical AC impedance, so that the actual value of electrochemical AC impedance continuously approaches the expected value of electrochemical AC impedance. Different target devices have different ways of determining corresponding purge control parameters. The determined purge control parameters are highly accurate, thereby improving the effect of purge control.

[0110] The technical solution of the embodiment of the present invention is based on the actual operating parameters of the fuel cell engine system, and limits the real-time control of the controller by table lookup or algorithm calculation, thereby ensuring the stable and efficient operation of the system. This solution not only takes into account the purging of the air system and hydrogen system of the fuel cell engine system at the time of cold shutdown, but also the cooling system participates in the cooperation, thus achieving a fast, efficient and lossless completion of the cold shutdown process.

[0111] Embodiment 3

[0112] Figure 3 1 is a schematic diagram of the structure of a fuel cell purge control device according to Embodiment 3 of the present invention. This embodiment is applicable to the case of implementing purge control of a fuel cell engine system during a cold shutdown process. Figure 3 As shown, the specific structure of the device includes:

[0113] An acquisition module 31 is used to acquire shutdown operation parameters of the fuel cell engine system during a cold shutdown process;

[0114] An impedance determination module 32 is used to determine an expected value of electrochemical AC impedance according to target operating parameters in the shutdown operating parameters, wherein the target operating parameters at least include stack operation time, stack air humidity, ambient temperature, and stack coolant temperature;

[0115] The purge control module 33 is used to determine the purge control parameters of the target device in the fuel cell engine system based on the shutdown operation parameters and the expected value of the electrochemical AC impedance.

[0116] The purge control device of the fuel cell provided in this embodiment is used to obtain the shutdown operation parameters of the fuel cell engine system during the cold shutdown process through the acquisition module 31; the impedance determination module 32 is used to determine the expected value of electrochemical AC impedance according to the target operation parameters in the shutdown operation parameters, and the target operation parameters at least include the operation time of the stack, the air humidity of the stack, the ambient temperature and the coolant temperature of the stack; the purge control module 33 is used to determine the purge control parameters of the target device in the fuel cell engine system based on the shutdown operation parameters and the expected value of electrochemical AC impedance. The above technical scheme takes into account multiple factors such as the operation time of the stack, the air humidity of the stack, the ambient temperature and the coolant temperature of the stack in the process of determining the expected value of electrochemical AC impedance, and the accuracy of the determined expected value of electrochemical AC impedance is high, thereby improving the effect of purge control based on the expected value of electrochemical AC impedance.

[0117] Furthermore, the impedance determination module 32 includes:

[0118] A first determination module is used to determine a first candidate electrochemical AC impedance based on the operation time of the battery stack and the air humidity of the stack;

[0119] A second determination module is used to determine a second candidate electrochemical AC impedance based on the operation time of the battery stack, the ambient temperature and the temperature of the coolant out of the stack;

[0120] The third determination module is used to determine an expected electrochemical alternating current impedance value based on the first candidate electrochemical alternating current impedance and the second candidate electrochemical alternating current impedance.

[0121] Furthermore, the third determination module is specifically used to:

[0122] The maximum value of the first candidate electrochemical alternating current impedance and the second candidate electrochemical alternating current impedance is determined as the expected electrochemical alternating current impedance value.

[0123] Further, the target device includes an air compressor, the purge control parameter includes the air compressor speed, and the purge control module 33 is specifically used for:

[0124] Obtaining a compressor speed feedforward value by looking up a table based on the expected value of the electrochemical AC impedance;

[0125] Determining an impedance deviation between the expected electrochemical alternating current impedance value and the actual electrochemical alternating current impedance value included in the shutdown operation parameter;

[0126] Using the impedance deviation as an input of an air compressor speed controller to determine a first output result of the air compressor speed controller;

[0127] The air compressor speed of the air compressor is determined based on the sum of the air compressor speed feedforward value and the first output result.

[0128] Further, the target device includes a drain valve, the purge control parameter includes a drain valve closing time, and the purge control module 33 is specifically used for:

[0129] Obtaining a drain valve closing time feedforward value by looking up a table based on the expected value of the electrochemical AC impedance;

[0130] Determining an impedance deviation between the expected electrochemical alternating current impedance value and the actual electrochemical alternating current impedance value included in the shutdown operation parameter;

[0131] Using the impedance deviation as an input of a drain valve closing time controller to determine a second output result of the drain valve closing time controller;

[0132] The drain valve closing time of the drain valve is determined based on the sum of the drain valve closing time feedforward value and the second output result.

[0133] Further, the target device includes a fan, the purge control parameter includes a fan opening, and the purge control module 33 is specifically used for:

[0134] The fan opening of the fan is obtained by looking up a table based on the outlet coolant temperature included in the shutdown operation parameters.

[0135] Further, the target device includes a thermostat, the purge control parameter includes a thermostat opening, and the purge control module 33 is specifically used for:

[0136] The thermostat opening of the thermostat is obtained by looking up a table based on the outlet coolant temperature included in the shutdown operation parameters.

[0137] Further, the target device includes a water pump, the purge control parameter includes a water pump speed, and the purge control module 33 is specifically used for:

[0138] The water pump speed of the water pump is determined based on the outgoing coolant temperature and the incoming coolant temperature included in the shutdown operation parameters.

[0139] Furthermore, the purge control module 33 is specifically used for:

[0140] Determining a temperature difference between the outgoing coolant temperature and the incoming coolant temperature;

[0141] The water pump speed of the water pump is obtained by looking up a table based on the temperature difference.

[0142] The fuel cell purge control device provided in the embodiment of the present invention can execute the fuel cell purge control method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0143] Embodiment 4

[0144] Figure 4 Schematic diagram of an electronic device implementing an embodiment of the present invention. The electronic device is intended to represent various forms of digital computers, such as desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. 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 claimed herein.

[0145] like Figure 4As 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.

[0146] 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.

[0147] The processor 11 may be a variety of general and / or special 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 special 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 executes the various methods and processes described above, such as a purge control method for a fuel cell.

[0148] In some embodiments, the purge control method of the fuel cell 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 purge control method of the fuel cell described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute the purge control method of the fuel cell in any other appropriate manner (e.g., by means of firmware).

[0149] 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.

[0150] 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.

[0151] 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.

[0152] To provide interaction with a user, the systems and techniques described herein can 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 can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and the input from the user can be received in any form.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] 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 fuel cell purge control method, characterized in that: include: Obtaining shutdown operation parameters of the fuel cell engine system during cold shutdown; Determine an expected value of electrochemical AC impedance according to a target operating parameter in the shutdown operating parameter, wherein the target operating parameter includes at least a stack operating time, an outlet air humidity, an ambient temperature, and an outlet coolant temperature; Based on the shutdown operation parameter and the expected electrochemical AC impedance value, a purge control parameter of a target device in the fuel cell engine system is determined.

2. The method according to claim 1, characterized in that Determining an expected value of electrochemical AC impedance according to a target operating parameter in the shutdown operating parameter includes: Determine a first candidate electrochemical alternating current impedance based on the operation time of the battery stack and the air humidity out of the stack; Determining a second candidate electrochemical alternating current impedance based on the stack operation time, the ambient temperature and the stack exit coolant temperature; An expected electrochemical alternating current impedance value is determined based on the first candidate electrochemical alternating current impedance and the second candidate electrochemical alternating current impedance.

3. The method according to claim 2, characterized in that Determining an expected electrochemical alternating current impedance value based on the first candidate electrochemical alternating current impedance and the second candidate electrochemical alternating current impedance includes: The maximum value of the first candidate electrochemical alternating current impedance and the second candidate electrochemical alternating current impedance is determined as the expected electrochemical alternating current impedance value.

4. The method according to claim 1, characterized in that: The target device includes an air compressor, the purge control parameter includes an air compressor speed, and based on the shutdown operation parameter and the expected electrochemical AC impedance value, determining the purge control parameter of the target device in the fuel cell engine system includes: Obtaining a compressor speed feedforward value by looking up a table based on the expected value of the electrochemical AC impedance; Determining an impedance deviation between the expected electrochemical alternating current impedance value and the actual electrochemical alternating current impedance value included in the shutdown operation parameter; Using the impedance deviation as an input of an air compressor speed controller to determine a first output result of the air compressor speed controller; The air compressor speed of the air compressor is determined based on the sum of the air compressor speed feedforward value and the first output result.

5. The method according to claim 1, characterized in that: The target device includes a drain valve, the purge control parameter includes a drain valve closing time, and based on the shutdown operation parameter and the expected electrochemical AC impedance value, determining the purge control parameter of the target device in the fuel cell engine system includes: Obtaining a drain valve closing time feedforward value by looking up a table based on the expected value of the electrochemical AC impedance; Determining an impedance deviation between the expected electrochemical alternating current impedance value and the actual electrochemical alternating current impedance value included in the shutdown operation parameter; Using the impedance deviation as an input of a drain valve closing time controller to determine a second output result of the drain valve closing time controller; The drain valve closing time of the drain valve is determined based on the sum of the drain valve closing time feedforward value and the second output result.

6. The method according to claim 1, characterized in that The target device includes a fan, the purge control parameter includes a fan opening, and based on the shutdown operation parameter and the expected value of the electrochemical AC impedance, the purge control parameter of the target device in the fuel cell engine system is determined, including: The fan opening of the fan is obtained by looking up a table based on the outlet coolant temperature included in the shutdown operation parameters.

7. The method according to claim 1, characterized in that The target device includes a thermostat, the purge control parameter includes a thermostat opening, and based on the shutdown operation parameter and the expected electrochemical AC impedance value, determining the purge control parameter of the target device in the fuel cell engine system includes: The thermostat opening of the thermostat is obtained by looking up a table based on the outlet coolant temperature included in the shutdown operation parameters.

8. The method according to claim 1, characterized in that The target device includes a water pump, the purge control parameter includes a water pump speed, and based on the shutdown operation parameter and the expected electrochemical AC impedance value, determining the purge control parameter of the target device in the fuel cell engine system includes: The water pump speed of the water pump is determined based on the outgoing coolant temperature and the incoming coolant temperature included in the shutdown operation parameters.

9. The method according to claim 8, characterized in that Determining the water pump speed of the water pump based on the outgoing coolant temperature and the incoming coolant temperature included in the shutdown operation parameters includes: Determining a temperature difference between the outgoing coolant temperature and the incoming coolant temperature; The water pump speed of the water pump is obtained by looking up a table based on the temperature difference.

10. A purge control device for a fuel cell, characterized in that: include: An acquisition module, used to acquire shutdown operation parameters of the fuel cell engine system during a cold shutdown process; An impedance determination module, used to determine an expected value of electrochemical AC impedance according to target operating parameters in the shutdown operating parameters, wherein the target operating parameters at least include stack operation time, stack air humidity, ambient temperature, and stack coolant temperature; The purge control module is used to determine the purge control parameters of the target device in the fuel cell engine system based on the shutdown operation parameters and the expected value of the electrochemical AC impedance.

11. The device according to claim 10, characterized in that The impedance determination module comprises: A first determination module is used to determine a first candidate electrochemical AC impedance based on the operation time of the battery stack and the air humidity of the stack; A second determination module is used to determine a second candidate electrochemical AC impedance based on the operation time of the battery stack, the ambient temperature and the temperature of the coolant out of the stack; The third determination module is used to determine an expected electrochemical alternating current impedance value based on the first candidate electrochemical alternating current impedance and the second candidate electrochemical alternating current impedance.

12. The device according to claim 11, characterized in that The third determination module is specifically used to: The maximum value of the first candidate electrochemical alternating current impedance and the second candidate electrochemical alternating current impedance is determined as the expected electrochemical alternating current impedance value.

13. An electronic device, characterized in that: include: at least one processor; as well as 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 method according to any one of claims 1 to 9.

14. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method according to any one of claims 1 to 9 when executed.

15. A computer program product, characterized in that The computer program product comprises a computer program, which, when executed by a processor, implements the method according to any one of claims 1 to 9.

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