Drainage Control Method, Device, Equipment and Medium for Hydrogen Fuel Cell

Abstract

The present invention discloses a drainage control method for a hydrogen fuel cell, comprising: obtaining the real-time current of the hydrogen fuel cell, and obtaining a real-time current integral value based on the real-time current; determining whether a drain and hydrogen discharge solenoid valve meets the opening condition based on the real-time current integral value; when the drain and hydrogen discharge solenoid valve meets the opening condition, determining the drainage time based on the real-time current and a pre-constructed association relation list or graph of current-drainage time; controlling the drain and hydrogen discharge solenoid valve according to the drainage time to complete the drainage control of the hydrogen fuel cell. The present invention can achieve the calibration of the correction factor in the corrected equivalent current integral and the determination of the integral threshold under multiple working conditions, and realize the coordinated control of anode drainage and hydrogen discharge of the fuel cell; at the same time, by automatically determining the opening time and the closing time, the water production effect of the fuel cell can be quantitatively evaluated, so as to achieve efficient and accurate drainage and hydrogen discharge management.

Description

Technical Field

[0001] The present invention relates to the field of fuel cells, and particularly to a drainage control method, device, equipment and medium for a hydrogen fuel cell. Background Art

[0002] A hydrogen fuel cell system includes a cathode air supply system and an anode hydrogen supply system. The emissions of a hydrogen fuel cell vehicle are water, achieving complete zero carbon emissions. To ensure the performance output of a hydrogen fuel cell, it is necessary to drain the water inside the fuel cell stack at an appropriate time to avoid flooding.

[0003] It should be noted that during the operation of the fuel cell stack, in addition to the liquid water being generated at the cathode of the hydrogen fuel cell, due to the electroosmotic drag phenomenon and permeation, a part of the liquid water at the cathode will permeate to the anode; in actual processes, the generation of liquid water at the anode has a more sensitive impact on the performance of the fuel cell stack. Therefore, in order to control the process of hydrogen discharge and water drainage of a hydrogen fuel cell vehicle, a water-gas separation device and a solenoid valve are usually arranged in the anode supply system. By only controlling the reasonable opening and closing time of the solenoid valve, the discharge of liquid water can be ensured, the concentration of anode hydrogen can be stabilized, and the stable performance output of the hydrogen fuel cell system can be guaranteed. For example, CN112928310A and CN113193214 both disclose how to control the drainage by opening and closing the drainage valve. However, the existing drainage controls all have the problem of low accuracy. Summary of the Invention

[0004] In view of the above-mentioned disadvantages of the prior art, the present invention provides a drainage control method, device, equipment and medium for a hydrogen fuel cell to solve the above technical problems.

[0005] A drainage control method for a hydrogen fuel cell provided by the present invention includes:

[0006] Obtaining the real-time current of the hydrogen fuel cell and obtaining a real-time current integral value based on the real-time current;

[0007] Judging whether a drainage and hydrogen discharge solenoid valve meets the opening condition based on the real-time current integral value;

[0008] When the drainage and hydrogen discharge solenoid valve meets the opening condition, determining a drainage time based on the real-time current and a pre-constructed association relationship list or graph of current-drainage time, where the association relationship list or graph is used to represent the corresponding relationship between current and drainage time;

[0009] Controlling the drainage and hydrogen discharge solenoid valve according to the drainage time to complete the drainage control of the hydrogen fuel cell.

[0010] In an embodiment of the present invention, the opening condition of the drain and hydrogen discharge solenoid valve includes: the real-time current integral value is greater than the integral threshold value.

[0011] In an embodiment of the present invention, the real-time current integral value is expressed as:

[0012]

[0013] Wherein, W Ik is a correction factor, I k is the current, t 1 is the start integration time, t 2 is the end integration time.

[0014] In an embodiment of the present invention, the method for determining the integral threshold value includes:

[0015] Obtain the first time interval during which the drain and hydrogen discharge solenoid valve changes from the first closed state to the first open state under different currents I ;

[0016] Calculate the product of different currents I and the corresponding first time interval ; ;

[0017] Transform the product to obtain , wherein, W Ik is the correction factor corresponding to different currents, and M is the common factor of all , representing the integral threshold value.

[0018] In an embodiment of the present invention, the condition for the drain and hydrogen discharge solenoid valve to be in the first closed state is that the average single-chip voltage and the lowest single-cell voltage are maintained within the first set range; the condition for the drain and hydrogen discharge solenoid valve to change from the first closed state to the first open state is that the decrease amplitude of the lowest single-cell voltage is within the second set range.

[0019] In an embodiment of the present invention, the method for constructing a current-drainage time correlation list or graph includes:

[0020] Obtain the drainage time of the drain and hydrogen discharge solenoid valve under different currents, and the drainage time is the second time interval during which the drain and hydrogen discharge solenoid valve changes from the second open state to the second closed state;

[0021] Based on different currents, establish a current-drainage time correlation list or graph with the drainage time corresponding to the different currents.

[0022] In one embodiment of the present invention, the condition for the drain and hydrogen discharge solenoid valve to change from the second open state to the second closed state is that the hydrogen concentration exceeds a set concentration value within a set time period.

[0023] In one embodiment of the present invention, determining the drainage time based on the real-time current and a pre-constructed association list or graph of current-drainage time includes:

[0024] According to the real-time current, look up the drainage time corresponding to the real-time current in the association list or graph.

[0025] A drainage control device for a hydrogen fuel cell provided by the present invention, the device includes:

[0026] A data acquisition module, configured to acquire the real-time current of the hydrogen fuel cell and obtain a real-time current integral value based on the real-time current;

[0027] A judgment module, configured to judge whether the drain and hydrogen discharge solenoid valve meets the opening condition based on the real-time current integral value;

[0028] A drainage time determination module, configured to determine the drainage time based on the real-time current and a pre-constructed association list or graph of current-drainage time when the drain and hydrogen discharge solenoid valve meets the opening condition; wherein, the association list or graph is used to represent the corresponding relationship between the current and the drainage time;

[0029] A drain and hydrogen discharge solenoid valve control module, configured to control the drain and hydrogen discharge solenoid valve according to the drainage time to complete the drainage control of the hydrogen fuel cell.

[0030] An electronic device provided by the present invention, the electronic device includes:

[0031] One or more processors;

[0032] A storage device, configured to store one or more programs, when the one or more programs are executed by the one or more processors, enabling the electronic device to implement the steps of the above-mentioned drainage control method for the hydrogen fuel cell.

[0033] A computer-readable storage medium provided by the present invention, on which a computer program is stored, when the computer program is executed by a processor of the computer, enabling the computer to execute the steps of the above-mentioned drainage control method for the hydrogen fuel cell.

[0034] A hydrogen fuel cell vehicle provided by the present invention, includes:

[0035] A hydrogen fuel cell, when the hydrogen fuel cell is draining, executing the steps of the above-mentioned drainage control method for the hydrogen fuel cell.

[0036] Advantages of the present invention: A drainage control method, device, equipment and medium for a hydrogen fuel cell in the present invention. The method includes: obtaining the real-time current of the hydrogen fuel cell and obtaining the real-time current integral value based on the real-time current; determining whether the drainage and hydrogen discharge solenoid valve meets the opening condition based on the real-time current integral value; when the drainage and hydrogen discharge solenoid valve meets the opening condition, determining the drainage time based on the real-time current and a pre-constructed association list or graph of current-drainage time, where the association list or graph is used to represent the corresponding relationship between the current and the drainage time; controlling the drainage and hydrogen discharge solenoid valve according to the drainage time to complete the drainage control of the hydrogen fuel cell. The present invention can realize the calibration of the correction factor in the corrected equivalent current integral and the determination of the integral threshold under multiple working conditions, and realize the coordinated control of the anode drainage and hydrogen discharge of the fuel cell; at the same time, by automatically determining the opening time and closing time, the water production effect of the fuel cell can be quantitatively evaluated, so as to realize efficient drainage and hydrogen discharge. Moreover, by determining the drainage time through the real-time current integral value and the pre-constructed association relationship of current-drainage time, the fixed-frequency drainage process can be converted into a variable-frequency drainage process, realizing high-precision drainage management, reducing power consumption while improving the utilization rate of hydrogen, thereby improving the economy.

[0037] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings here are incorporated into the specification and constitute a part of this specification, showing the embodiments consistent with this application, and are used together with the specification to explain the principles of this application. Obviously, the accompanying drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0039] Figure 1 Schematic diagram of a hydrogen fuel cell system shown in an exemplary embodiment of this application;

[0040] Figure 2 Flowchart of the drainage control method of the hydrogen fuel cell shown in an exemplary embodiment of this application;

[0041] Figure 3 Schematic diagram of current integral derivation in a steady state shown in an exemplary embodiment of this application;

[0042] Figure 4 Schematic diagram of current integral derivation during dynamic change shown in an exemplary embodiment of this application;

[0043] Figure 5Flowchart of a method for determining an integration threshold shown in an exemplary embodiment of the present application;

[0044] Figure 6 Flowchart of a method for constructing a correlation table or graph of current - drainage time shown in an exemplary embodiment of the present application;

[0045] Figure 7 Flowchart of a drainage control device for a hydrogen fuel cell shown in an exemplary embodiment of the present application;

[0046] Figure 8 Shows a schematic structural diagram of a computer system of an electronic device suitable for implementing the embodiments of the present application. Detailed implementation manners

[0047] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for explaining the present invention and not for limiting the protection scope of the present invention.

[0048] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0049] In the following description, a large number of details are explored to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.

[0050] Figure 1 Is a schematic diagram of a hydrogen fuel cell system shown in an exemplary embodiment of the present application. Please refer to Figure 1, the implementation system includes: a hydrogen inlet solenoid valve 1, a drain and hydrogen discharge solenoid valve 2, a gas-water separator 3, a hydrogen supply and return assembly 4, a hydrogen fuel cell reactor 5, a single-cell voltage monitor 6, an FCCU controller (fuel electronic controller) 7, and a hydrogen concentration sensor 8; the hydrogen fuel cell reactor 5 has a first anode inlet, a first anode outlet, a second cathode outlet, and a second cathode inlet; the gas-water separator 3 includes a first hydrogen inlet, a first drain outlet, and a second hydrogen discharge outlet; the FCCU controller 7 includes multiple signal channels; the hydrogen supply and return assembly 4 has a first hydrogen inlet, a second return tail gas inlet, and a first hydrogen outlet; the single-cell voltage monitor 6 includes multiple channels for collecting the average voltage, the lowest single-cell voltage, the highest single-cell voltage, current, and other parameters of each single cell of the hydrogen fuel cell stack; the hydrogen inlet solenoid valve 1 is connected to the first hydrogen inlet of the hydrogen supply and return assembly 4, and the first anode outlet of the hydrogen fuel cell reactor 5 is connected to the first hydrogen inlet of the gas-water separator 3, so as to form a passage between the hydrogen fuel cell reactor 5 and the gas-water separator 3; the second hydrogen discharge outlet of the gas-water separator 3 is connected to the second return tail gas inlet of the hydrogen supply and return assembly 4, so as to form a passage between the gas-water separator 3 and the hydrogen supply and return assembly 4 to realize the supply of recycled hydrogen; the hydrogen concentration sensor 8 can collect the hydrogen concentration after the drain and hydrogen discharge solenoid valve 2 is opened and can communicate with the FCCU controller 7.

[0051] When drain control is required, the real-time current of the fuel cell is collected by the single-cell voltage monitor, and then the FCCU controller obtains the real-time current of the hydrogen fuel cell and obtains a real-time current integral value based on the real-time current; it is determined whether the drain and hydrogen discharge solenoid valve meets the opening condition based on the real-time current integral value; when the drain and hydrogen discharge solenoid valve meets the opening condition, the drain time is determined based on the real-time current and a pre-constructed association list or graph of current-drain time; wherein, the association list or graph is used to represent the corresponding relationship between current and drain time; the drain and hydrogen discharge solenoid valve is controlled according to the drain time to complete the drain control of the hydrogen fuel cell.

[0052] Embodiments of the present application respectively propose a drain control method for a hydrogen fuel cell, a drain control device for a hydrogen fuel cell, an electronic device, and a computer-readable storage medium. These embodiments will be described in detail below.

[0053] Please refer to Figure 2 , Figure 2 is a flowchart of a drain control method for a hydrogen fuel cell shown in an exemplary embodiment of the present application. This method can be applied to Figure 1The described implementation environment, and is specifically executed by the FCCU controller in this implementation environment. It should be understood that this method can also be applied to other exemplary implementation environments and be specifically executed by devices in other implementation environments. This embodiment does not limit the implementation environment applicable to this method.

[0054] Please refer to Figure 2 , Figure 2 which is a flowchart of a drainage control method for a hydrogen fuel cell according to an exemplary embodiment of the present application. The drainage control method for the hydrogen fuel cell at least includes steps S210 to S240, which are introduced in detail as follows:

[0055] Step S210: Obtain the real-time current of the hydrogen fuel cell, and obtain a real-time current integral value based on the real-time current;

[0056] Step S220: Determine whether the drain and hydrogen exhaust solenoid valve meets the opening condition based on the real-time current integral value;

[0057] Step S230: When the drain and hydrogen exhaust solenoid valve meets the opening condition, determine the drainage time based on the real-time current and a pre-constructed correlation list or graph of current-drainage time; wherein, the correlation list or graph is used to represent the corresponding relationship between current and drainage time;

[0058] Step S240: Control the drain and hydrogen exhaust solenoid valve according to the drainage time to complete the drainage control of the hydrogen fuel cell.

[0059] Through the present invention, it is possible to achieve the calibration of the correction factor in the corrected equivalent current integration and the determination of the integration threshold under multiple working conditions, and to achieve the coordinated control of anode drainage and hydrogen exhaust of a fuel cell vehicle. At the same time, by automatically determining the opening time and closing time, the water production effect of the fuel cell can be quantitatively evaluated, so as to achieve efficient drainage and hydrogen exhaust. Moreover, by determining the drainage time based on the real-time current integral value and the pre-constructed correlation between current and drainage time, the fixed-frequency drainage process can be transformed into a variable-frequency drainage process, reducing power consumption while improving the utilization rate of hydrogen, thereby enhancing the economy.

[0060] The following will elaborate on each step of the drainage control method for the hydrogen fuel cell in the above embodiment.

[0061] In step S210, obtain the real-time current of the hydrogen fuel cell, and obtain a real-time current integral value based on the real-time current;

[0062] To control the stack in a hydrogen fuel cell, parameters such as the average voltage of each single cell, the lowest single-cell voltage, the highest single-cell voltage, and the current of the fuel cell stack are collected through a single-chip voltage inspection device; the FCCU controller can record various parameters collected by the single-chip voltage inspection device and calculate the real-time current integral value based on the current.

[0063] Step S220, determine whether the drain and hydrogen discharge solenoid valve meets the opening condition based on the real-time current integral value;

[0064] Specifically, the opening condition of the drain and hydrogen discharge solenoid valve includes: the real-time current integral value is greater than the integral threshold.

[0065] That is to say, if the real-time current integral value is greater than the integral threshold, the drain and hydrogen discharge solenoid valve meets the opening condition, and the FCCU controller will control the drain and hydrogen discharge solenoid valve to open to achieve the drainage control of the fuel cell.

[0066] The original current integration method is shown in formula (1):

[0067] (1)

[0068] By transforming formula (1) and setting a correction factor, we can get formula (2) as follows:

[0069] (2)

[0070] Among them, W Ik is the correction factor, I k is the current, t 1 represents the start integration time, which is the opening time after the hydrogen inlet solenoid valve enables hydrogen discharge, t 2 represents the end integration time. It can be understood that under different current conditions, there will be different integral thresholds M for each current. When the real-time integral value reaches the integral threshold, drainage should be started. The determination of the real-time integral value EQV k is determined in combination with the system performance. However, if there are multiple working conditions, there will be multiple EQV k values. How to determine the integral threshold is a difficult point.

[0071] Core idea: In this method, the main purpose is to deduce and prove that formula (1) is equivalent to formula (2), that is, after the correction factor in formula (2) is proposed, formula (1) and formula (2) have the same effect, and the integral threshold can be determined for both static and dynamic working conditions.

[0072] Refer to Figure 3, for the steady-state condition, according to the operating conditions of the fuel cell stack or the power demand of the vehicle, there are n selectable conditions, where n represents a finite number of current conditions. For example, the current is represented by I k , where .

[0073] According to the Newton-Leibniz formula, transform formula (1):

[0074]

[0075] where C is a constant.

[0076] When k = 1:

[0077]

[0078] When k = 2:

[0079]

[0080] When k = n:

[0081]

[0082] Under the steady-state condition, transform formulas (3), (5), and (7) to obtain

[0083]

[0084] When operating at current I = k,

[0085] That is, when EQV k EQV1 = M . C 1 or EQV2 = M . C 2 or EQV n = M . Cn

[0086] Transforming EQV k can obtain

[0087]

[0088] In equations (9), (10), and (11), n = k

[0089] Therefore, It is proven

[0090] Refer to Figure 4, for the dynamic variable load condition, after discretizing and differentiating according to the Newton-Leibniz formula, formula (2) is transformed as follows:

[0091]

[0092] When combined working condition 1 is k = 1, 2:

[0093]

[0094] When combined working condition 2 is k = 3, 4, 5:

[0095]

[0096] When combined working condition n is k = 1,..., n:

[0097]

[0098] Derivation and proof

[0099] (15)

[0100] (16)

[0101] Adding formula (15) and (16) gives

[0102] (17)

[0103] Therefore, (18)

[0104] Assume that the system current changes from I1 to I K When K = 1.2... N and the following formula (18) is satisfied, the drain and hydrogen discharge solenoid valve should actuate, i.e., open the drain and hydrogen discharge solenoid valve.

[0105] Please refer to Figure 5 , Figure 5 which is a flowchart of the method for determining the integration threshold shown in an exemplary embodiment of the present application. In Figure 5 , the method for determining the integration threshold includes:

[0106] Step S510, obtain the first time interval during which the drain and hydrogen discharge solenoid valve changes from the first closed state to the first open state at different currents I ;

[0107] Step S520, calculate the product of different currents I and the corresponding first time interval ; ;

[0108] Step S530, perform an operation on the product Perform a transformation to obtain , where W Ik are correction factors corresponding to different currents, and M is the greatest common divisor of all , representing the integration threshold.

[0109] Specifically, after the hydrogen fuel cell system (hereinafter referred to as the system) is normally warmed up and started at room temperature, keep the system power output stable or the current output stable. When the output is stable, send a closing command to the drain and hydrogen discharge solenoid valve through the FCCU controller to close the drain and hydrogen discharge solenoid valve. It can be understood that after the drain and hydrogen discharge solenoid valve is closed, it is in the first closed state, and the condition for the drain and hydrogen discharge solenoid valve to be in the first closed state (the drain and hydrogen discharge solenoid valve is closed) is that the average voltage of a single cell and the lowest cell voltage are kept within a first set range, that is, the average and lowest cell voltages displayed by the single cell voltage monitor are stable and there is no obvious decrease.

[0110] After the drain and hydrogen discharge solenoid valve is closed, the stack of the hydrogen fuel cell will accumulate water at the anode due to electroosmotic drag and permeation, resulting in a decrease in stack performance. When the lowest cell voltage measured by the single cell voltage monitor decreases significantly (that is, the decrease amplitude of the lowest cell voltage is within a second set range), send an opening command to the drain and hydrogen discharge solenoid valve through the FCCU controller to change the drain and hydrogen discharge solenoid valve from the first closed state to the first open state, so as to restore the stack performance until the lowest cell voltage measured by the single cell voltage monitor is stable.

[0111] It can be understood that the decrease amplitude of the lowest cell voltage can be 0.02 mv. Of course, those skilled in the art can select the decrease amplitude of the lowest cell voltage according to actual needs, and will not elaborate here.

[0112] Set different steady-state powers or currents, repeat the above steps (that is, the cycle steps of changing the drain and hydrogen discharge solenoid valve from the first closed state to the first open state, and then from the first open state to the first closed state), and save the process data.

[0113] Process the data saved under different powers or different currents. Subtract the time point of the first closed state from the time point of the first open state to obtain the first time interval ∆T, and then calculate the product of the current and the first time interval ; then for all , perform a transformation to obtain , where the greatest common divisor M is extracted, and C_K is the correction factor under different currents.

[0114] It should be noted that the method for determining the integration threshold further includes: setting an amplification factor for amplifying the common factor; using the common factor amplified by the amplification factor as the integration threshold. Specifically, M can be amplified by different multiples according to the actual product, such as 0.01, 0.1, ……, 1, 10, etc.

[0115] Step S230, when the drain and hydrogen discharge solenoid valve meets the opening condition, determine the drainage time based on the real-time current and a pre-constructed correlation list or graph of current-drainage time; wherein, the correlation list or graph is used to represent the corresponding relationship between current and drainage time;

[0116] In one embodiment, determining the drainage time based on the real-time current and a pre-constructed correlation list or graph of current-drainage time includes: finding the drainage time corresponding to the real-time current in the correlation list or graph according to the real-time current.

[0117] That is to say, after obtaining the real-time current, find the drainage time corresponding to the real-time current in the correlation list or graph. Specifically, the correlation list or graph includes: current A, current B, current C, and the corresponding drainage times of current A, current B, and current C are drainage time A, drainage time B, and drainage time C respectively. When the obtained real-time current is A, the drainage time can be determined as A by querying in the correlation list or graph.

[0118] Please refer to Figure 6 , Figure 6 which is a flowchart of the method for constructing a correlation table or graph of current-drainage time shown in an exemplary embodiment of the present application. In Figure 6 it, the method for constructing a correlation table or graph of current-drainage time includes:

[0119] Step S610, obtain the drainage time of the drain and hydrogen discharge solenoid valve under different currents, where the drainage time is the second time interval for the drain and hydrogen discharge solenoid valve to change from the second open state to the second closed state;

[0120] Step S620, based on different currents, establish a correlation table or graph of current-drainage time with the corresponding drainage times of different currents.

[0121] Specifically, at a certain current, the drain and hydrogen discharge solenoid valve is opened. When the drain and hydrogen discharge solenoid valve is opened, the real-time value of the hydrogen concentration at this time is recorded. It should be noted that the state when the drain and hydrogen discharge solenoid valve is opened is defined as the second open state. After the drain and hydrogen discharge solenoid valve is opened, if within a set time period, the hydrogen concentration exceeds the set concentration value, the drain and hydrogen discharge solenoid valve is closed. It should be noted that the state when the drain and hydrogen discharge solenoid valve is closed is defined as the second closed state. That is to say, the condition for the drain and hydrogen discharge solenoid valve to change from the second open state to the second closed state is that within the set time period, the hydrogen concentration exceeds the set concentration value.

[0122] In this embodiment, the set time period is 3 seconds and the set concentration value is 4%. That is to say, when the drain and hydrogen discharge solenoid valve is opened, if the hydrogen concentration exceeds 4% within 3 seconds, the drain and hydrogen discharge solenoid valve should be closed. At this time, the time period for the drain and hydrogen discharge solenoid valve to change from the second open state to the second closed state is the drainage time. It should be noted that the hydrogen concentration exceeding 4% within 3 seconds is based on the emission regulations. This method not only meets the economy but also meets the emission characteristics.

[0123] Under different currents, repeat the foregoing steps, that is, cyclically open and close the drain and hydrogen discharge solenoid valve, and record the drainage time of the drain and hydrogen discharge solenoid valve under each current, so as to form the correlation between current and drainage time.

[0124] Step S240, control the drain and hydrogen discharge solenoid valve according to the drainage time to complete the drainage control of the hydrogen fuel cell.

[0125] When the real-time current integral value meets the opening condition of the drain and hydrogen discharge solenoid valve, open the drain and hydrogen discharge solenoid valve, keep the drain and hydrogen discharge solenoid valve in the open state according to the drainage time. When the time for the drain and hydrogen discharge solenoid valve to be in the open state reaches the drainage time, close the drain and hydrogen discharge solenoid valve to complete the drainage control of the fuel cell.

[0126] The present invention can realize the calibration of the correction factor in the corrected equivalent current integral and the determination of the integral threshold under multiple working conditions, and realize the coordinated control of the anode drainage and hydrogen discharge of the fuel cell vehicle; at the same time, by automatically determining the opening time and determining the closing time, the water production effect of the fuel cell can be quantitatively evaluated, so as to realize efficient drainage and hydrogen discharge. Moreover, by determining the drainage time through the real-time current integral value and the pre-constructed correlation between current and drainage time, the fixed-frequency drainage process can be converted into a variable-frequency drainage process, reducing power consumption while improving the utilization rate of hydrogen, thereby improving the economy.

[0127] It should be understood that the sequence numbers of the steps in the above embodiments do not imply the order of execution. The execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

[0128] Figure 7 is a block diagram of a drainage control device for a hydrogen fuel cell shown in an exemplary embodiment of the present application. This device can be applied to Figure 1 the shown implementation environment and is specifically configured in the FCCU controller. This device can also be applicable to other exemplary implementation environments and is specifically configured in other devices. The embodiments do not limit the implementation environment applicable to this device.

[0129] As Figure 7 shown, the present application provides a drainage control device for a hydrogen fuel cell. The device includes:

[0130] A data acquisition module 710, configured to acquire the real-time current of the hydrogen fuel cell and obtain a real-time current integral value based on the real-time current;

[0131] A judgment module 720, configured to judge whether a drainage and hydrogen discharge solenoid valve meets the opening condition based on the real-time current integral value;

[0132] A drainage time determination module 730, configured to determine the drainage time based on the real-time current and a pre-constructed association relationship list or graph of current - drainage time when the drainage and hydrogen discharge solenoid valve meets the opening condition; wherein, the association relationship list or graph is used to represent the corresponding relationship between current and drainage time;

[0133] A drainage and hydrogen discharge solenoid valve control module 740, configured to control the drainage and hydrogen discharge solenoid valve according to the drainage time to complete the drainage control of the hydrogen fuel cell.

[0134] It should be noted that the drainage control device for a hydrogen fuel cell provided in the above embodiments and the drainage control method for a hydrogen fuel cell provided in the above embodiments belong to the same concept. The specific manners in which each module and unit perform operations have been described in detail in the method embodiments and will not be elaborated here. In practical applications, the drainage control device for a hydrogen fuel cell provided in the above embodiments can, according to needs, allocate the above functions to different functional modules, that is, divide the internal structure of the device into different functional modules to complete all or part of the functions described above. This is not limited here either.

[0135] Embodiments of the present application further provide an electronic device, including: one or more processors; a storage device for storing one or more programs, which, when executed by the one or more processors, cause the electronic device to implement the drainage control method of the hydrogen fuel cell provided in each of the above embodiments.

[0136] Figure 8 The structural schematic diagram of a computer system of an electronic device suitable for implementing the embodiments of the present application is shown. It should be noted that Figure 8 The computer system of the electronic device shown is only an example and should not impose any limitation on the functions and usage scope of the embodiments of the present application.

[0137] As Figure 8 shown, the computer system includes a central processing unit (CPU), which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) or the program loaded from the storage part into the random access memory (RAM), such as executing the method described in the above embodiments. In the RAM, various programs and data required for system operation are also stored. The CPU, ROM, and RAM are connected to each other via a bus. The input / output (I / O) interface is also connected to the bus.

[0138] The following components are connected to the I / O interface: an input part including a keyboard, a mouse, etc.; an output part including a cathode ray tube (CRT), a liquid crystal display (LCD), etc. and a speaker, etc.; a storage part including a hard disk, etc.; and a communication part including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication part performs communication processing via a network such as the Internet. The drive is also connected to the I / O interface as required. A removable medium, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive as required, so that the computer program read from it can be installed into the storage part as required.

[0139] Particularly, according to the embodiments of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments of the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes instructions for executing the process Figure 2A computer program of the method shown. In such an embodiment, the computer program can be downloaded and installed from a network through a communication section and / or installed from a removable medium. When the computer program is executed by a central processing unit (CPU), various functions defined in the system of the present application are executed.

[0140] It should be noted that the computer-readable medium shown in the embodiments of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the two. A computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable signal medium can include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable computer program. Such a propagated data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium can be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0141] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present application. Among them, each box in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the above-mentioned module, program segment, or part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the boxes may occur in a different order than that marked in the accompanying drawings. For example, two consecutively represented boxes may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, as well as the combination of boxes in the block diagram or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0142] The units involved in the embodiments described in the present application can be implemented in software or in hardware, and the described units can also be set in the processor. Among them, the names of these units do not constitute a limitation to the unit itself in some cases.

[0143] Another aspect of the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by the processor of the computer, the computer is caused to execute the drainage control method of the hydrogen fuel cell as described above. The computer-readable storage medium can be included in the electronic device described in the above embodiments, or can exist alone without being assembled into the electronic device.

[0144] Another aspect of the present application also provides a computer program product or a computer program. The computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the drainage control method of the hydrogen fuel cell provided in the above various embodiments.

[0145] Another aspect of the present application also provides a hydrogen fuel cell vehicle, including:

[0146] A hydrogen fuel cell, which, when draining water, executes the steps of the drainage control method of the hydrogen fuel cell as Figure 2 shown.

[0147] The above embodiments are only used to exemplarily illustrate the principles and effects of the present invention, rather than to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A drainage control method for a hydrogen fuel cell, characterized in that, including: Obtain the real-time current of the hydrogen fuel cell, and obtain the real-time current integral value based on the real-time current; Judge whether the drain and hydrogen discharge solenoid valve meets the opening condition based on the real-time current integral value; When the drain and hydrogen discharge solenoid valve meets the opening condition, determine the drainage time based on the real-time current and the pre-constructed association list or graph of current-drainage time; wherein, the association list or graph is used to represent the corresponding relationship between current and drainage time; Control the drain and hydrogen discharge solenoid valve according to the drainage time to complete the drainage control of the hydrogen fuel cell; The opening condition of the drain and hydrogen discharge solenoid valve includes: the real-time current integral value is greater than the integral threshold; The method for determining the integral threshold comprises: obtaining a first time interval at which the water and hydrogen discharge solenoid valve changes from a first closed state to a first open state under different currents I. ; Calculate different currents I and the corresponding first time intervals The product of ; for the product Transform and get ,in, W Ik is the correction factor corresponding to different currents, M is the The common factor of represents the integration threshold; The method for constructing the association list or graph of current-drainage time includes: obtaining the drainage time of the drain and hydrogen discharge solenoid valve under different currents, where the drainage time is the second time interval for the drain and hydrogen discharge solenoid valve to change from the second open state to the second closed state; establishing the association list or graph of current-drainage time based on different currents and the corresponding drainage times of different currents.

2. The drainage control method of the hydrogen fuel cell according to claim 1, wherein, The real-time current integral value is expressed as: Among them, W Ik is the correction factor, I k is the current, t 1 is the start integration time, t 2 is the end integration time.

3. The drainage control method of the hydrogen fuel cell according to claim 1, wherein The condition for the drain and hydrogen discharge solenoid valve to be in the first closed state is that the single-chip average voltage and the lowest single-cell voltage are maintained within the first set range; the condition for the drain and hydrogen discharge solenoid valve to change from the first closed state to the first open state is that the decrease amplitude of the lowest single-cell voltage is within the second set range.

4. The drainage control method of the hydrogen fuel cell according to claim 1, characterized in that, The condition for the drain and hydrogen discharge solenoid valve to change from the second open state to the second closed state is that the hydrogen concentration exceeds the set concentration value within the set time period.

5. The drainage control method of the hydrogen fuel cell according to claim 1, characterized in that Determining the drainage time based on the real-time current and the pre-constructed association list or graph of current-drainage time includes: Search for the drainage time corresponding to the real-time current in the association list or graph according to the real-time current.

6. A drainage control device for a hydrogen fuel cell using the control method according to any one of claims 1-5, characterized in that, The device includes: A data acquisition module, configured to obtain the real-time current of the hydrogen fuel cell and obtain the real-time current integral value based on the real-time current; A judgment module, configured to judge whether the drain and hydrogen discharge solenoid valve meets the opening condition based on the real-time current integral value; A drainage time determination module, configured to determine the drainage time based on the real-time current and the pre-constructed association list or graph of current-drainage time when the drain and hydrogen discharge solenoid valve meets the opening condition; wherein, the association list or graph is used to represent the corresponding relationship between current and drainage time; A drain and hydrogen discharge solenoid valve control module, configured to control the drain and hydrogen discharge solenoid valve according to the drainage time to complete the drainage control of the hydrogen fuel cell.

7. An electronic device, characterized in that, The electronic device includes: One or more processors; A storage device, configured to store one or more programs, and when the one or more programs are executed by the one or more processors, enable the electronic device to implement the steps of the drainage control method of the hydrogen fuel cell as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, A computer program is stored thereon, and when the computer program is executed by the processor of the computer, enable the computer to execute the steps of the drainage control method of the hydrogen fuel cell as described in any one of claims 1 to 5.

9. A hydrogen fuel cell vehicle, characterized in that, including: A hydrogen fuel cell, which, when draining water, performs the steps of the water drainage control method of the hydrogen fuel cell according to any one of claims 1 to 5.

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