A method, device, equipment and medium for calculating water storage capacity inside a fuel cell stack

Abstract

The present application provides a method, device, equipment and medium for calculating the internal water storage capacity of a fuel cell stack. The method comprises: obtaining the current water storage chamber volume and the current working current of a battery stack to be tested to obtain an equivalent drainage time, calculating the equivalent drainage time and the current water storage chamber volume to obtain the anode drainage capacity of the battery stack to be tested, obtaining the theoretical anode water production based on a preset initial permeability factor and the anode permeability relationship between the anode water production and the permeability factor, correcting the initial permeability factor based on the theoretical anode water production and the anode drainage to obtain the actual permeability factor, calculating the cathode water production according to the actual permeability factor and the cathode permeability relationship between the cathode water production and the permeability factor, and finally calculating the cathode water production and the anode drainage to obtain the internal water storage capacity of the battery stack to be tested; by calculating the anode drainage capacity and the permeability factor, accurately estimating the cathode water production and the anode drainage capacity of the fuel cell stack, thereby effectively calculating the internal water storage capacity of the battery stack.

Description

Technical Field

[0001] The present application relates to the field of fuel cell technology, and in particular to a method, device, equipment and medium for calculating the internal water storage capacity of a fuel cell stack. Background Art

[0002] With the growing global demand for clean energy, hydrogen fuel cell technology, with its zero-emission characteristic of only water, is becoming the core focus of new energy technology development. Based on its mature application in the aerospace field, this technology has rapidly expanded to the transportation field, especially the commercialization process of hydrogen fuel cell vehicles has significantly accelerated, showing a broad market prospect. However, in the actual operation of fuel cells, if the water produced by the electrochemical reaction is not properly managed, it will directly affect the battery performance and the service life of key materials.

[0003] In the prior art, in order to effectively control the water content inside the fuel cell and prevent material attenuation and performance degradation, it is crucial to accurately measure and control the water distribution. Usually, a water storage cavity and a water metering method thereof as proposed in 202011429729.2 are used. By optimizing the design of the water storage cavity structure and cooperating with the liquid level sensor, accurate measurement of the liquid storage volume characteristics and liquid level height on the anode side of the fuel cell can be achieved. However, this method uses the input of the liquid level sensor as the only quantity and is highly dependent on the liquid level sensor. If the liquid level sensor fails, the overall calculation results will not be available. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present application provides a method, device, equipment and medium for calculating the internal water storage capacity of a fuel cell stack to solve the above-mentioned technical problems.

[0005] A method for calculating the internal water storage capacity of a fuel cell stack, the method comprising: obtaining a current water storage chamber volume and a current working current of a battery stack to be detected; obtaining an equivalent drainage time of the battery stack to be detected based on the current working current and the current water storage chamber volume, and calculating the equivalent drainage time and the current water storage chamber volume to obtain the anode drainage capacity of the battery stack to be detected; respectively constructing an anode permeability relationship between anode water production and a permeability factor, and a cathode permeability relationship between cathode water production and a permeability factor; obtaining a theoretical anode water production based on a preset initial permeability factor and the anode permeability relationship, and correcting the initial permeability factor based on the theoretical anode water production and anode drainage to obtain a corrected actual permeability factor; calculating the cathode water production of the battery stack to be detected based on the actual permeability factor and the cathode permeability relationship; calculating the cathode water production and the anode drainage, and determining the calculated difference as the internal water storage capacity of the fuel cell stack of the battery stack to be detected.

[0006] In one embodiment of the present application, the equivalent drainage time of the battery stack to be detected is obtained based on the current working current and the current water storage chamber volume, including: obtaining the operating sampling time interval of the battery stack to be detected, and collecting the standard full-scale drainage time under different water storage chamber volumes and different working current states; constructing a full-scale drainage time information table based on the scheduled drainage time of each water storage chamber volume and each working current state; obtaining the target full-scale drainage time of the battery stack to be detected by querying in the full-scale drainage time information table based on the current working current and the current water storage chamber volume; calculating the operating sampling time interval to obtain the current enabling time of the battery stack to be detected, and calculating the ratio of the current potential energy time and the target full-scale drainage time to obtain the equivalent drainage time.

[0007] In one embodiment of the present application, the initial permeability factor is corrected based on the anode theoretical water production and the anode water discharge, including: calculating the difference between the anode theoretical water production and the anode water discharge; iteratively adjusting the initial permeability factor based on a preset algorithm until an updated permeability factor with the smallest difference is found; recalculating the anode theoretical water production based on the updated permeability factor to obtain an updated theoretical water production, and performing a new round of comparison and optimization based on the updated theoretical water production and the anode water discharge to achieve a cyclic correction of the permeability factor; verifying whether the corrected permeability factor reduces the difference between the anode theoretical water production and the anode water discharge, and calculating the current difference corresponding to the current permeability factor when the verification passes; if the current difference is less than the preset difference, terminating the cyclic correction, and determining the current permeability factor as the corrected actual permeability factor.

[0008] In one embodiment of the present application, an anode permeability relationship between anode water production and a permeability factor, and a cathode permeability relationship between cathode water production and a permeability factor are respectively constructed, including: obtaining the current density and the stack area of ​​the battery stack to be tested, and obtaining a theoretical constant of the battery stack to be tested based on the current density, the stack area and the Faraday constant; determining the product of the theoretical constant and the permeability factor as the anode water production, and determining the sum of the anode water production of the theoretical constant as the cathode water production.

[0009] In one embodiment of the present application, a cathode permeability relationship between cathode water production and permeability factor is constructed, and its expression is as follows:

[0010]

[0011] in, Indicates the cathode water production under different working current conditions, Represents the stack area, represents the current density, is the Faraday constant, represents the permeability coefficient.

[0012] In one embodiment of the present application, an anode permeability relationship between anode water production and permeability factor is constructed, and its expression is as follows:

[0013]

[0014] in, Indicates the anode water production under different working current conditions, Represents the stack area, represents the current density, is the Faraday constant, represents the permeability coefficient.

[0015] In one embodiment of the present application, the method for calculating the internal water storage capacity of a fuel cell stack also includes: real-time monitoring of the enable status of the solenoid valve; when the solenoid valve is in the enable status, starting to accumulate the operating sampling time interval of the controller to obtain the cumulative time of the enable phase of the solenoid valve; recording the number of enable phases and the corresponding cumulative time to obtain the average enable time of the solenoid valve; obtaining the average equivalent time based on the average enable time and the target full-scale drainage time, and calculating the average anode drainage volume of the battery stack to be tested based on the average equivalent drainage time.

[0016] The present application provides a device for calculating the internal water storage capacity of a fuel cell stack, the device comprising: a data acquisition module, used to obtain the current water storage chamber volume and the current working current of the battery stack to be detected; an anode water discharge calculation module, used to obtain the equivalent water discharge time of the battery stack to be detected based on the current working current and the current water storage chamber volume, and calculate the equivalent water discharge time and the current water storage chamber volume to obtain the anode water discharge capacity of the battery stack to be detected; a permeability factor determination module, used to respectively construct an anode permeability relationship between anode water production and permeability factor, and a cathode permeability relationship between cathode water production and permeability factor; obtain the anode theoretical water production based on a preset initial permeability factor and the anode permeability relationship, and correct the initial permeability factor based on the anode theoretical water production and the anode water discharge to obtain a corrected actual permeability factor; a cathode water production calculation module, used to calculate the cathode water production of the battery stack to be detected based on the actual permeability factor and the cathode permeability relationship; an internal water storage calculation module, used to calculate the cathode water production and the anode water discharge, and determine the calculated difference as the internal water storage capacity of the fuel cell stack of the battery stack to be detected.

[0017] The present application provides an electronic device, including a processor, a memory and a communication bus; the communication bus is used to connect the processor and the memory; the processor is used to execute a computer program stored in the memory to implement the method for calculating the internal water storage capacity of a fuel cell stack as described above.

[0018] The present application provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program is used to enable a computer to execute the method for calculating the internal water storage amount of a fuel cell stack as described above.

[0019] Beneficial effects of the present application: The method for calculating the internal water storage capacity of the fuel cell stack in the present application obtains the equivalent drainage time by obtaining the current water storage chamber volume and the current working current of the battery stack to be tested, calculates the equivalent drainage time and the current water storage chamber volume to obtain the anode drainage capacity of the battery stack to be tested, obtains the theoretical anode water production based on the preset initial permeability factor and the anode permeability relationship between the anode water production and the permeability factor, corrects the initial permeability factor based on the theoretical anode water production and the anode drainage capacity to obtain the actual permeability factor, calculates the cathode water production based on the actual permeability factor and the cathode permeability relationship between the cathode water production and the permeability factor, and finally calculates the cathode water production and the anode drainage capacity to obtain the internal water storage capacity of the battery stack to be tested. Different from the traditional method that needs to rely on external equipment such as hydraulic sensors to obtain the water volume information inside the fuel cell stack, which not only increases the complexity and cost of the system, but also may introduce additional errors; the present application accurately estimates the cathode water production and anode drainage of the fuel cell stack by calculating the anode drainage capacity and the permeability factor, without relying on the relevant parameters of the hydraulic sensor, thereby effectively reducing the complexity and cost of the system.

[0020] In addition, the present application can accurately calculate the anode water discharge by obtaining the current water storage chamber volume and current working current of the battery stack to be tested, combined with the concept of equivalent drainage time; at the same time, the theoretical anode water production is accurately estimated through the preset initial permeability factor and the anode permeability relationship between the anode water production and the permeability factor. Further, the initial permeability factor is corrected based on the theoretical anode water production and the anode drainage to obtain the actual permeability factor, and the cathode water production is calculated accordingly. This series of steps ensures the accuracy and reliability of the calculation results.

[0021] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0023] Figure 1is a schematic diagram of an implementation environment of a method for calculating the internal water storage amount of a fuel cell stack according to an exemplary embodiment of the present application;

[0024] Figure 2 is a flow chart of a method for calculating the internal water storage capacity of a fuel cell stack according to an exemplary embodiment of the present application;

[0025] Figure 3 is a schematic diagram of solenoid valve enabling triggering shown in an exemplary embodiment of the present application;

[0026] Figure 4 is a flow chart of calculating the average anode enabling time shown in an exemplary embodiment of the present application;

[0027] Figure 5 is a block diagram of a device for calculating the internal water storage amount of a fuel cell stack shown in an exemplary embodiment of the present application;

[0028] Figure 6 is a schematic diagram of the hardware structure of a fuel cell system shown in an exemplary embodiment of the present application;

[0029] Figure 7 A schematic diagram of the structure of a computer system suitable for implementing an electronic device of an embodiment of the present application is shown.

[0030] Reference numerals:

[0031] 1- fuel cell stack; 2- anode outlet pipe; 3- anode inlet pipe; 4- steam-water separator; 5- solenoid valve; 6- FCCU controller unit. DETAILED DESCRIPTION

[0032] The following will describe the implementation methods of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, not for limiting the scope of protection of the present application.

[0033] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present application. However, it is obvious to those skilled in the art that the embodiments of the present application 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 application difficult to understand.

[0034] Figure 1It is a schematic diagram of the implementation environment of a method for calculating the internal water storage amount of a fuel cell stack shown in an exemplary embodiment of the present application.

[0035] like Figure 1 As shown, the implementation environment of the method for calculating the internal water storage capacity of a fuel cell stack includes a data acquisition device 101 and a computer device 102, wherein the data acquisition device 101 is used to collect physical parameters of the fuel cell to be tested, such as the current water storage chamber volume and the current working current, and send the collected battery physical parameters to the computer device 102, and the data acquisition device can be any device or equipment that can be used for battery physical information collection, such as a multimeter, a sensor, etc., and the present application does not impose any restrictions on this; the computer device 102 is used to calculate the drainage state of the fuel cell based on the battery physical parameters collected by the data acquisition device 101, so as to obtain the anode drainage and the anode theoretical water production, thereby correcting the permeability coefficient, and calculating the cathode water production based on the corrected permeability coefficient, and finally obtaining the internal water storage capacity of the fuel cell based on the cathode water production and the anode drainage. Among them, the computer device 102 can be at least one of a desktop graphics processing unit (GPU) computer, a GPU computing cluster, a neural network computer, etc., or an intelligent processor integrated in the current vehicle, and the present application does not impose any restrictions on this.

[0036] Figure 2 It is a flow chart of a method for calculating the internal water storage amount of a fuel cell stack shown in an exemplary embodiment of the present application.

[0037] like Figure 2 As shown, in an exemplary embodiment, the method for calculating the internal water storage amount of a fuel cell stack includes at least steps S210 to S260, which are described in detail as follows:

[0038] Step S210, obtaining the current water storage chamber volume and current operating current of the battery stack to be tested.

[0039] In one embodiment of the present application, the volume of the water storage chamber is calculated based on the collective shape of the water storage chamber; and a current sensor is used, which is directly connected to the output end of the battery stack to measure and record the operating current in real time.

[0040] It should be noted that the method for collecting the volume and current of the water storage chamber proposed in the above embodiment is only one of many data collection methods, and the present application does not impose any restrictions on the method for obtaining the volume and current.

[0041] Step S220, obtaining the equivalent drainage time of the battery stack to be tested based on the current working current and the current water storage chamber volume, and calculating the equivalent drainage time and the current water storage chamber volume to obtain the anode drainage volume of the battery stack to be tested.

[0042] In one embodiment of the present application, the equivalent drainage time of the battery stack to be tested is obtained based on the current working current and the current water storage chamber volume, including: obtaining the operating sampling time interval of the battery stack to be tested, and collecting the standard full-scale drainage time under different water storage chamber volumes and different working current states; constructing a full-scale drainage time information table based on the scheduled drainage time of each water storage chamber volume and each working current state; querying the full-scale drainage time information table based on the current working current and the current water storage chamber volume to obtain the target full-scale drainage time of the battery stack to be tested; calculating the operating sampling time interval to obtain the current enabling time of the battery stack to be tested, and calculating the ratio of the current potential energy time and the target full-scale drainage time to obtain the equivalent drainage time.

[0043] In one embodiment of the present application, first ensure that the battery stack is in normal working condition and all sensors are correctly installed and calibrated; set the operation sampling time interval, and start the data acquisition system to collect the current working current and water storage chamber volume of the battery stack in real time through the current sensor and the liquid level sensor. Then, according to the current working current and the water storage chamber volume, query the full-range drainage time information table to obtain the target full-range drainage time, and calculate the current enabling time (i.e., the actual operating time) within the operation sampling time interval, and calculate the ratio of the current enabling time to the target full-range drainage time to obtain the equivalent drainage time.

[0044] Figure 3 It is a schematic diagram of solenoid valve enabling triggering shown in an exemplary embodiment of the present application.

[0045] like Figure 3 As shown, the enabling state of the solenoid valve includes two states, 1 and 0, and the sampling interval time has no direct relationship with the state retention time. Therefore, in a specific embodiment of the present application, in order to calculate the equivalent drainage time, it is first determined whether the current enabling state of the solenoid valve is 1; if the current enabling state of the solenoid valve is 1, that is, ES==1, then the cumulative time of the enabling stage is calculated, otherwise the enabling stage time is not calculated. The calculation formula for the enabling cumulative time is as follows:

[0046] Formula (1)

[0047] in, Indicates the cumulative time in the current enabling stage. Indicates the controller's running sampling time interval.

[0048] In addition, based on the physical structural characteristics of the steam-water separator of the fuel cell stack to be tested, the time required for full-scale water discharge under different anode outlet conditions was obtained through experiments, and a full-scale water discharge time information table was generated based on the test data, and its expression is as follows:

[0049] Formula (2)

[0050] in, It indicates the full discharge time of the water-steam separator under full water condition at the anode outlet under different powers; Represents a function mapping relationship that can be interpolated and looked up in a table; Indicates the volume of the water storage chamber inside the steam-water separator, that is, the volume of the water storage chamber of the battery stack to be tested; Indicates the operating current of the battery stack to be tested.

[0051] Secondly, the equivalent drainage time of the battery stack to be tested is calculated based on the above-obtained cumulative enabling time and full-range drainage time, as follows:

[0052] Formula (3)

[0053] in, represents the equivalent drainage time, Indicates the cumulative time in the current enabling stage. Indicates the full drainage time.

[0054] Finally, the equivalent drainage time and the current water storage chamber volume are calculated to obtain the anode drainage volume of the battery stack to be tested. The calculation formula of the anode drainage volume is as follows:

[0055] Formula (4)

[0056] in, represents the anode water discharge, represents the equivalent drainage time, Indicates the volume of the water storage chamber.

[0057] Step S230, constructing an anode permeability relationship between anode water production and permeability factor, and a cathode permeability relationship between cathode water production and permeability factor.

[0058] In one embodiment of the present application, an anode permeability relationship between anode water production and a permeability factor, and a cathode permeability relationship between cathode water production and a permeability factor are respectively constructed, including: obtaining the current density and stack area of ​​the battery stack to be tested, and obtaining a theoretical constant of the battery stack to be tested based on the current density, the stack area and the Faraday constant; determining the product of the theoretical constant and the permeability factor as the anode water production, and determining the sum of the anode water production of the theoretical constants as the cathode water production.

[0059] In one embodiment of the present application, the anode water production and the cathode water production are set as follows:

[0060] Formula (5)

[0061] in, Indicates the anode water production under different working current conditions, Represents the stack area, represents the current density, is the Faraday constant, represents the permeability coefficient.

[0062] Formula (6)

[0063] in, Indicates the cathode water production under different working current conditions, Represents the stack area, represents the current density, is the Faraday constant, represents the permeability coefficient.

[0064] Step S240, obtaining the anode theoretical water production based on the preset initial permeability factor and the anode permeability relationship, and correcting the initial permeability factor based on the anode theoretical water production and the anode water discharge to obtain a corrected actual permeability factor.

[0065] In one embodiment of the present application, the initial permeability factor is corrected based on the anode theoretical water production and the anode water discharge, including: calculating the difference between the anode theoretical water production and the anode water discharge; iteratively adjusting the initial permeability factor based on a preset algorithm until an updated permeability factor with the smallest difference is found; recalculating the anode theoretical water production based on the updated permeability factor to obtain an updated theoretical water production, and performing a new round of comparison and optimization based on the updated theoretical water production and the anode water discharge to achieve a cyclic correction of the permeability factor; verifying whether the corrected permeability factor reduces the difference between the anode theoretical water production and the anode water discharge, and calculating the current difference corresponding to the current permeability factor when the verification passes; if the current difference is less than the preset difference, terminating the cyclic correction, and determining the current permeability factor as the corrected actual permeability factor.

[0066] In one embodiment of the present application, in order to correct the permeability factor. First, the actual drainage data of the anode is obtained by a flow sensor or a similar measuring device, and the theoretical water production of the anode, that is, the theoretical drainage, is calculated according to Faraday's law and the preset permeability coefficient. Then, the actual drainage is compared with the theoretical drainage, the difference or ratio between the two is calculated, and a suitable optimization algorithm, such as the golden section method, the gradient descent method or other search algorithm, is selected to adjust the permeability coefficient to minimize the difference between the actual drainage and the theoretical drainage; thereby adjusting the permeability coefficient using the optimization algorithm, usually involving an iterative process, in which the value of the permeability coefficient is gradually adjusted until the permeability coefficient value that minimizes the difference between the actual drainage and the theoretical drainage is found. Finally, the adjusted permeability coefficient is applied to the system and the theoretical drainage is recalculated; the actual drainage data is collected again and compared with the new theoretical drainage; if necessary, the above optimization process is repeated to achieve a continuous cycle correction of the permeability factor.

[0067] In a specific embodiment of the present application, the initial permeability coefficient is optimized using the golden section method, which is as follows:

[0068] Formula (7)

[0069] in, represents the optimization function, Indicates the actual anode water discharge, Indicates the theoretical water production of the anode.

[0070] It should be noted that the actual anode water discharge can be calculated based on the above formula (4), while the theoretical anode water production can be expressed based on the above formula (5).

[0071] Step S250, calculating the cathode water production of the battery stack to be tested according to the actual permeability factor and the cathode permeability relationship.

[0072] In one embodiment of the present application, after the corrected actual permeability factor is calculated according to the above embodiment, the value of the actual permeability factor is substituted into the above formula (6), and the cathode water production of the battery stack to be tested can be calculated.

[0073] Step S260, calculating the cathode water production and the anode water discharge, and determining the calculated difference as the internal water storage capacity of the fuel cell stack of the battery stack to be tested.

[0074] In one embodiment of the present application, after the cathode water production is calculated based on the above formula (6) and the anode water discharge is calculated based on the above formula (4), the difference between the cathode water production and the anode water discharge is further calculated to be the internal water storage capacity of the battery stack to be tested, and the calculation method is as follows:

[0075] Formula (8)

[0076] in, Indicates the internal water storage capacity of the battery stack to be tested. Indicates the cathode water production of the battery stack to be tested, Indicates the anode water discharge amount of the battery stack to be tested.

[0077] In one embodiment of the present application, the method for calculating the internal water storage capacity of a fuel cell stack also includes: real-time monitoring of the enable status of the solenoid valve; when the solenoid valve is in the enable status, starting to accumulate the operating sampling time intervals of the controller to obtain the cumulative time of the enable phase of the solenoid valve; recording the number of enable phases and the corresponding cumulative time to obtain the average enable time of the solenoid valve; obtaining the average equivalent time based on the average enable time and the target full-scale drainage time, so as to calculate the average drainage volume of the anode of the battery stack to be tested based on the average equivalent drainage time.

[0078] Figure 4 is a flowchart of calculating the average anode enabling time shown in an exemplary embodiment of the present application.

[0079] like Figure 4 As shown, first determine the current enabling state, and calculate the enabling time in each enabling state of 1, as well as the total number of enabling states of 1, so as to further obtain the corresponding average enabling time based on the statistically obtained enabling time and number.

[0080] In a specific implementation of this application, Figure 4 As shown, the method for calculating the internal water storage capacity of a fuel cell stack proposed in this application calculates the average internal water storage capacity of the fuel cell stack over a period of time by counting the average enabling time of the fuel cell stack over a period of time. The specific calculation steps are as follows:

[0081] First, count the number of fuel cell stacks in the enabling stage, as follows:

[0082] Formula (9)

[0083] in, represents the number of enabled stages and, Indicates the enabling phase.

[0084] Then, based on the sum of the number of enabling stages calculated by formula 9, the average enabling time is further calculated as follows:

[0085] Formula (10)

[0086] in, Indicates the average enabling time of the battery valve before enabling stage, represents the number of enabled stages and, Indicates the enabling phase.

[0087] Finally, the average enabling time obtained above is substituted for the current enabling time and substituted into formula (3) to obtain the drainage equivalent time. The average water storage capacity is never calculated based on the new drainage equivalent time. Since the other calculation steps are the same as the aforementioned method for calculating the current internal water storage capacity, they will not be repeated here.

[0088] Figure 5 is a block diagram of a device for calculating the internal water storage capacity of a fuel cell stack shown in an exemplary embodiment of the present application. The device can be applied to Figure 1 The device may also be applicable to other exemplary implementation environments and specifically configured in other devices, and this embodiment does not limit the implementation environment to which the device is applicable.

[0089] As shown in FIG5 , the exemplary fuel cell stack internal water storage amount calculation device includes:

[0090] Among them, the data acquisition module 510 is used to obtain the current water storage chamber volume and the current working current of the battery stack to be tested; the anode drainage calculation module 520 is used to obtain the equivalent drainage time of the battery stack to be tested based on the current working current and the current water storage chamber volume, and calculate the equivalent drainage time and the current water storage chamber volume to obtain the anode drainage of the battery stack to be tested; the permeability factor determination module 530 is used to respectively construct the anode permeability relationship between the anode water production and the permeability factor, and the cathode permeability relationship between the cathode water production and the permeability factor; based on the preset initial permeability factor and the anode permeability relationship, the anode theoretical water production is obtained, and the initial permeability factor is corrected based on the anode theoretical water production and the anode drainage to obtain the corrected actual permeability factor; the cathode water production calculation module 540 is used to calculate the cathode water production of the battery stack to be tested according to the actual permeability factor and the cathode penetration relationship; the internal water storage calculation module 550 is used to calculate the cathode water production and the anode drainage, and determine the calculated difference as the internal water storage of the fuel cell stack of the battery stack to be tested.

[0091] It should be noted that the fuel cell stack internal water storage capacity calculation device provided in the above embodiment and the fuel cell stack internal water storage capacity calculation method provided in the above embodiment belong to the same concept, wherein the specific manner in which each module and unit performs the operation has been described in detail in the method embodiment, and will not be repeated here. In practical applications, the fuel cell stack internal water storage capacity calculation device provided in the above embodiment can allocate the above functions to different functional modules as needed, that is, divide the internal structure of the device into different functional modules to complete all or part of the functions described above, and this is not limited here.

[0092] Figure 6 It is a schematic diagram of the hardware structure of a fuel cell system shown in an exemplary embodiment of the present application.

[0093] like Figure 6 As shown, the hardware structure of the fuel cell system includes a fuel cell stack 1, an anode outlet pipe 2, an anode inlet pipe 3, a steam-water separator 4, a solenoid valve 5 and an FCCU controller unit 6. Among them, the fuel cell stack is the core component of the fuel cell system, which converts the chemical energy of hydrogen and oxygen into electrical energy through electrochemical reactions. The anode outlet pipe is used to export the gas (mainly containing incompletely reacted hydrogen and water vapor generated by the reaction) after the reaction on the anode side of the fuel cell stack. The anode inlet pipe is used to provide fresh hydrogen or recycled hydrogen to the anode side of the fuel cell stack. The steam-water separator is installed on the anode outlet pipe to separate the water vapor generated by the reaction from the hydrogen flow to prevent liquid water from entering the hydrogen circulation system and affecting the performance and life of the system. The working principle of the steam-water separator may include fluid diversion, baffles, centrifugal separation, filtration or condensation. Solenoid valve, in the fuel cell system, the solenoid valve may be used to control the supply, discharge or circulation process of hydrogen, as well as operations related to water management, such as controlling drainage. The FCCU (Fuel Cell Control Unit) controller unit, also known as the fuel cell controller, is the "brain" of the fuel cell system. It is responsible for receiving control instructions from the entire vehicle, coordinating the work of other controllers and actuators in the fuel cell system, monitoring the status of the fuel cell stack, adjusting the supply of hydrogen and air, and controlling the operation of the water management system to ensure that the fuel cell system can output electrical energy safely, reliably and efficiently.

[0094] An embodiment of the present application also provides an electronic device, comprising: one or more processors; a storage device for storing one or more programs, and when the one or more programs are executed by one or more processors, the electronic device implements the method for calculating the internal water storage capacity of a fuel cell stack provided in the above-mentioned embodiments.

[0095] Figure 7 The structure diagram of the computer system suitable for implementing the electronic device of the embodiment of the present application is shown. It should be noted that: Figure 7 The computer system 700 of the electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0096] like Figure 7As shown, the computer system 700 includes a central processing unit 701, which can perform various appropriate actions and processes according to the program stored in the read-only memory 702 or the program loaded from the storage part 708 into the random access memory 703, such as executing the method described in the above embodiment. Various programs and data required for system operation are also stored in the random access memory 703. The central processing unit 701, the read-only memory 702 and the random access memory 703 are connected to each other via a bus 704. The input / output interface 705 is also connected to the bus 704.

[0097] The following components are connected to the input / output interface 705: an input section 706 including a keyboard, a mouse, etc.; an output section 707 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker; a storage section 708 including a hard disk, etc.; and a communication section 709 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 709 performs communication processing via a network such as the Internet. A drive 710 is also connected to the input / output interface 705 as needed. A removable medium 711, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 710 as needed so that a computer program read therefrom is installed into the storage section 708 as needed.

[0098] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through the communication part 709, and / or installed from a removable medium 711. When the computer program is executed by the central processing unit 701, various functions defined in the system of the present application are executed.

[0099] It should be noted that the computer-readable medium shown in the embodiment of the present application may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with 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 disk 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 may include a data signal propagated in a baseband or as part of a carrier, which carries a computer-readable computer program. This propagated data signal may take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. A computer program contained on a computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0100] The flowchart and block diagram in the accompanying drawings illustrate the possible architecture, functions and operations of the system, method and computer program product according to various embodiments of the present application. Wherein, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0101] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. The names of these units do not constitute limitations on the units themselves in some cases.

[0102] Another aspect of the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor of a computer, the computer executes the method for calculating the internal water storage capacity of a fuel cell stack as described above. The computer-readable storage medium may be included in the electronic device described in the above embodiment, or may exist independently without being assembled into the electronic device.

[0103] Another aspect of the present application also provides a computer program product or a computer program, which includes a computer instruction stored in a computer-readable storage medium. A processor of a computer device reads the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the computer device executes the method for calculating the internal water storage capacity of a fuel cell stack provided in each of the above embodiments.

[0104] The above embodiments are merely illustrative of the principles and effects of the present application, and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A method for calculating the internal water storage capacity of a fuel cell stack, characterized in that: The method comprises: Obtaining the current water storage chamber volume and current operating current of the battery stack to be tested; The equivalent drainage time of the battery stack to be detected is obtained based on the current working current and the current water storage chamber volume, including: obtaining the operation sampling time interval of the battery stack to be detected, and collecting the standard full-scale drainage time under different water storage chamber volumes and different working current states; constructing a full-scale drainage time information table based on the scheduled drainage time of each water storage chamber volume and each working current state; obtaining the target full-scale drainage time of the battery stack to be detected by querying the full-scale drainage time information table based on the current working current and the current water storage chamber volume; calculating the operation sampling time interval to obtain the current enabling time of the battery stack to be detected, and calculating the ratio of the current enabling time and the target full-scale drainage time to obtain the equivalent drainage time; Calculate the anode drainage volume of the battery stack to be tested according to the equivalent drainage time and the current water storage chamber volume; The anode permeability relationship between anode water production and permeability factor, and the cathode permeability relationship between cathode water production and permeability factor were constructed respectively. Among them, the cathode permeability relationship between cathode water production and permeability factor is expressed as follows: in, Indicates the cathode water production under different working current conditions, Represents the stack area, represents the current density, is the Faraday constant, represents the permeability factor; The anode permeability relationship between anode water production and permeability factor is expressed as follows: in, Indicates the anode water production under different working current conditions, Represents the stack area, represents the current density, is the Faraday constant, represents the permeability factor; Obtaining anode theoretical water production based on a preset initial permeability factor and the anode permeability relationship, and correcting the initial permeability factor based on the anode theoretical water production and anode water discharge to obtain a corrected actual permeability factor; Calculate the cathode water production of the battery stack to be tested according to the actual permeability factor and the cathode permeability relationship; The difference between the cathode water production and the anode water discharge is calculated, and the calculated difference is determined as the internal water storage capacity of the fuel cell stack of the battery stack to be tested.

2. The method for calculating the internal water storage capacity of a fuel cell stack according to claim 1, characterized in that: The initial permeability factor is corrected based on the anode theoretical water production and anode water discharge, including: Calculating the difference between the theoretical water production of the anode and the water discharge of the anode; Iteratively adjusting the initial permeability factor based on a preset algorithm until an updated permeability factor with the smallest difference value is found; Recalculating the anode theoretical water production based on the updated permeability factor to obtain an updated theoretical water production, and performing a new round of comparison and optimization based on the updated theoretical water production and the anode water discharge to achieve cyclic correction of the permeability factor; Verify whether the corrected permeability factor reduces the difference between the theoretical anode water production and the anode water discharge, and calculate the current difference value corresponding to the current permeability factor when the verification is passed; If the current difference value is less than the preset difference value, the cyclic correction is terminated, and the current permeability factor is determined as the corrected actual permeability factor.

3. The method for calculating the internal water storage capacity of a fuel cell stack according to any one of claims 1 to 2, characterized in that: The method further comprises: Real-time monitoring of the enabling status of the solenoid valve; When the solenoid valve is in the enabled state, the operation sampling time interval of the controller starts to be accumulated to obtain the accumulated time of the enabling stage of the solenoid valve; Record the number of enabling stages and the corresponding cumulative time to obtain the average enabling time of the solenoid valve; An average equivalent drainage time is obtained based on the average enabling time and the target full-range drainage time, so as to calculate an average anode drainage amount of the battery stack to be tested based on the average equivalent drainage time.

4. A device for calculating the internal water storage capacity of a fuel cell stack, characterized in that: The device is used to implement the method for calculating the internal water storage capacity of a fuel cell stack according to claim 1, and the device comprises: A data acquisition module is used to obtain the current water storage chamber volume and current operating current of the battery stack to be tested; an anode water discharge calculation module, used to obtain an equivalent water discharge time of the battery stack to be detected based on the current working current and the current water storage chamber volume, and to calculate the anode water discharge volume of the battery stack to be detected according to the equivalent water discharge time and the current water storage chamber volume; A permeability factor determination module is used to respectively construct an anode permeability relationship between anode water production and permeability factor, and a cathode permeability relationship between cathode water production and permeability factor; obtain anode theoretical water production based on a preset initial permeability factor and the anode permeability relationship, and correct the initial permeability factor based on the anode theoretical water production and anode water discharge to obtain a corrected actual permeability factor; A cathode water production calculation module, used to calculate the cathode water production of the battery stack to be tested according to the actual permeability factor and the cathode permeability relationship; The internal water storage capacity calculation module is used to calculate the difference between the cathode water production and the anode water discharge, and determine the calculated difference as the internal water storage capacity of the fuel cell stack of the battery stack to be tested.

5. An electronic device, characterized in that: It comprises a processor, a memory and a communication bus; the communication bus is used to connect the processor and the memory; the processor is used to execute a computer program stored in the memory to implement the method for calculating the internal water storage capacity of a fuel cell stack as described in any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and the computer program is used to enable a computer to execute the method for calculating the internal water storage amount of a fuel cell stack as described in any one of claims 1-3.

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