Shutdown purging method and device of fuel cell and electronic medium

Abstract

The invention provides a shutdown purging method and device of a fuel cell system and an electronic medium. An air compressor in the fuel cell system is an energy recovery type air compressor; the method comprises the following steps: when the fuel cell system enters a shutdown purging state, acquiring a real-time air compressor rotating speed of an air compressor; matching processing is conducted on the real-time air compressor rotating speed on the basis of preset purging data, and a target corresponding relation corresponding to the real-time air compressor rotating speed is obtained; the preset purging data represents a corresponding relation between different opening degrees of the regulating valve and the recovery power of the air compressor under different rotating speeds of the air compressor; adjusting valve opening processing is conducted on the real-time air compressor rotating speed according to the target corresponding relation, and the target adjusting valve opening is obtained; and the regulating valve is controlled according to the target regulating valve opening degree, so that the air compressor reaches the target recovery power in the shutdown purging process, the problem of high power consumption of the air compressor in the purging process of an existing fuel cell system is solved, and the system efficiency of the fuel cell system in the purging process is improved.

Description

Technical Field

[0001] This application relates to the field of fuel cell systems, specifically to a shutdown purging method, apparatus, and electronic medium for a fuel cell. Background Technology

[0002] When a fuel cell system is shut down, it is essential to promptly purge away any residual water produced during operation. This prevents irreversible damage to the stack due to excessive humidity or flooding during the next startup. Especially at low temperatures, residual water can freeze, hindering subsequent system restarts. Cathode purging takes approximately 25 seconds at room temperature, and this time is longer at lower temperatures to prevent freezing. Using conventional purging methods, an air compressor needs to continuously supply a certain flow of air to the purging stack. This continuous operation consumes a significant portion of the power, approximately 5kW, accounting for about 80% of the fuel cell purging system's output power. This power consumption by the air compressor results in a substantial proportion of the system's output power being low.

[0003] Therefore, there is an urgent need for a shutdown purging method for fuel cells to improve the output power efficiency of the air compressor during the purging process, thereby reducing the power consumption of the air compressor and improving the overall system efficiency of the fuel cell system's output power. Summary of the Invention

[0004] This application proposes a shutdown purging method, apparatus, and electronic medium for fuel cells to solve the problem of high power consumption of the air compressor during the purging process in existing fuel cell systems, thereby improving the system efficiency of the fuel cell system during the purging process.

[0005] On one hand, this application provides a shutdown purging method for a fuel cell system. The fuel cell system includes an air compressor connected to the air inlet of the fuel cell stack cathode and a turbine connected to the air outlet of the fuel cell stack cathode. A regulating valve is provided between the air outlet and the turbine. The air compressor is an energy recovery type air compressor. The method includes: When the fuel cell system enters the shutdown purging state, the real-time air compressor speed of the air compressor is obtained; The real-time air compressor speed is matched based on preset purging data to obtain the target correspondence with the real-time air compressor speed; the preset purging data represents the correspondence between different regulating valve openings and air compressor recovery power at different air compressor speeds; Based on the target correspondence, the real-time air compressor speed is adjusted to regulate the valve opening to obtain the target regulating valve opening. The regulating valve is controlled according to the target regulating valve opening, so that the air compressor achieves the target power recovery during the shutdown purging process.

[0006] Further, the method further comprises: obtaining a preset speed range of the air compressor and a preset opening range of the adjusting valve; performing parameter combination processing on the air compressor speed in the preset speed range and the adjusting valve opening in the preset opening range to obtain a first preset number of parameter combinations; the parameter combination is a combination of different air compressor speeds and corresponding adjusting valve openings; controlling the fuel cell combination to perform a first preset number of shutdown purges on the fuel cell according to the first preset number of parameter combinations, and determining the respective corresponding recovered power of the first preset number of parameter combinations during the shutdown purge process; performing construction processing on the respective corresponding recovered power of the first preset number of parameter combinations and the first preset number of parameter combinations to obtain the preset purge data.

[0007] Further, the parameter combination processing on the air compressor speed in the preset speed range and the adjusting valve opening in the preset opening range to obtain a first preset number of parameter combinations comprises: performing speed interval sampling on the preset speed range based on a preset interval speed to obtain a second preset number of air compressor speeds; performing opening interval sampling on the preset opening range based on a preset interval opening to obtain a third preset number of adjusting valve openings; performing combination processing on the second preset number of air compressor speeds and the third preset number of adjusting valve openings to obtain the first preset number of parameter combinations.

[0008] Further, the controlling the fuel cell combination to perform a first preset number of shutdown purges on the fuel cell according to the first preset number of parameter combinations, and determining the respective corresponding recovered power of the first preset number of parameter combinations during the shutdown purge process comprises: performing sorting processing on the first preset number of parameter combinations according to the size relationship of the second preset number of air compressor speeds and the size relationship of the third preset number of adjusting valve openings to obtain sorted parameter combinations; taking the first parameter combination in the sorted parameter combinations as a current parameter combination; controlling the fuel cell combination to perform a shutdown purge on the fuel cell according to the current parameter combination, and determining the current recovered power corresponding to the current parameter combination during the shutdown purge process; remove the current parameter combination from the ordered parameter combinations to obtain new ordered parameter combinations, and re-determine the parameter combination ranked first in the new ordered parameter combinations as the current parameter combination; Repeat the operation of controlling the fuel cell combination to shut down and purge the fuel cell according to the current parameter combination until the first preset number of shutdown and purging is completed.

[0009] Further, the operation of controlling the fuel cell combination to shut down and purge the fuel cell according to the current parameter combination and determining the current recovery power corresponding to the current parameter combination during shutdown and purge includes: controlling the fuel cell combination to shut down and purge the fuel cell according to the current parameter combination, and obtaining real-time temperature data and real-time flow data during shutdown and purge; processing the real-time temperature data and the real-time flow data to obtain the current recovery power.

[0010] Further, the operation of processing the recovery power corresponding to each of the first preset number of parameter combinations and the first preset number of parameter combinations to obtain the preset purge data includes: performing data set construction processing on the first preset number of parameter combinations and the recovery power corresponding to each of the first preset number of parameter combinations according to the same air compressor speed strategy to obtain a second preset number of data sets; performing fitting processing on the second preset number of data sets respectively to obtain a second preset number of relationship data between the adjustment valve opening degree and the air compressor recovery power; constructing the preset purge data based on the second preset number of relationship data.

[0011] Further, the operation of matching the real-time air compressor speed based on the preset purge data to obtain a target corresponding relationship corresponding to the real-time air compressor speed includes: matching the real-time air compressor speed based on the second preset number of air compressor speeds to determine the target speed interval corresponding to the real-time air compressor speed; obtaining all relationship data within the target speed interval from the preset purge data as the target corresponding relationship.

[0012] Further, an energy recovery motor is further arranged between the turbine and the air compressor; the method further includes: During shutdown and purge, the air discharged from the cathode of the stack is subjected to mechanical energy conversion processing based on the turbine to obtain recovered mechanical energy; The energy recovery motor converts the recovered mechanical energy to obtain the target recovered power, and drives the air compressor to operate based on the target recovered power.

[0013] In another aspect, the embodiment of the present application also provides a shutdown purging device of a fuel cell system, the fuel cell system comprising an air compressor in communication with an air inlet of a cathode of an electric pile, and a turbine in communication with an air outlet of the cathode of the electric pile, an adjusting valve being arranged between the air outlet and the turbine, the air compressor being an energy recovery type air compressor; the device comprising: An acquisition module is configured to acquire a real-time air compressor rotating speed of the air compressor when the fuel cell system enters a shutdown purging state; A matching module is configured to match the real-time air compressor rotating speed based on preset purging data to obtain a target corresponding relationship corresponding to the real-time air compressor rotating speed, the preset purging data representing corresponding relationship data of different adjusting valve opening degrees and air compressor recovered powers under different air compressor rotating speeds; A processing module is configured to perform adjusting valve opening degree processing on the real-time air compressor rotating speed according to the target corresponding relationship to obtain a target adjusting valve opening degree; A control module is configured to control the adjusting valve according to the target adjusting valve opening degree to adjust an air parameter passing through the turbine, so that the air compressor reaches a target recovered power in a shutdown purging process.

[0014] Further, the device further comprises: A first acquisition unit is configured to acquire a preset rotating speed range of the air compressor and a preset opening degree range of the adjusting valve; A parameter combination unit is configured to perform parameter combination processing on air compressor rotating speeds in the preset rotating speed range and adjusting valve opening degrees in the preset opening degree range to obtain a first preset number of parameter combinations, the parameter combination being a combination of different air compressor rotating speeds and corresponding adjusting valve opening degrees; A control unit is configured to control the fuel cell combination to perform a first preset number of times of shutdown purging on the fuel cell according to the first preset number of parameter combinations, respectively, and determine a recovered power corresponding to each of the first preset number of parameter combinations in a shutdown purging process; A construction unit is configured to perform construction processing on the recovered power corresponding to each of the first preset number of parameter combinations and the first preset number of parameter combinations to obtain the preset purging data.

[0015] Further, the parameter combination unit comprises: a first sampling unit configured to sample the preset speed range at preset interval speeds to obtain a second preset number of air compressor speeds; a second sampling unit configured to sample the preset opening range at preset interval openings to obtain a third preset number of regulating valve openings; a combination unit configured to combine the second preset number of air compressor speeds and the third preset number of regulating valve openings to obtain the first preset number of parameter combinations.

[0016] Further, the control unit comprises: a sorting unit configured to sort the first preset number of parameter combinations according to the size relationship of the second preset number of air compressor speeds and the size relationship of the third preset number of regulating valve openings to obtain sorted parameter combinations; a determination unit configured to determine a parameter combination at the top of the sorted parameter combinations as a current parameter combination; a purging unit configured to control the fuel cell combination to shut down and purge the fuel cell according to the current parameter combination and determine a current recovered power corresponding to the current parameter combination during the shutdown and purging process; a re-sorting unit configured to remove the current parameter combination from the sorted parameter combinations to obtain new sorted parameter combinations, and determine a parameter combination at the top of the new sorted parameter combinations as a new current parameter combination; a repeating unit configured to repeat the operation of controlling the fuel cell combination to shut down and purge the fuel cell according to the current parameter combination until the operation of determining a parameter combination at the top of the new sorted parameter combinations as a new current parameter combination is completed for a first preset number of times.

[0017] Further, the purging unit comprises: a second acquisition unit configured to control the fuel cell combination to shut down and purge the fuel cell according to the current parameter combination, and acquire real-time temperature data and real-time flow data during the shutdown and purging process; a recovered power determination unit configured to process the real-time temperature data and the real-time flow data to obtain the current recovered power.

[0018] Further, the construction unit comprises: a data set construction unit configured to perform data set construction processing on the first preset number of parameter combinations and the first preset number of recovered powers corresponding to the first preset number of parameter combinations according to the same air compressor speed strategy to obtain a second preset number of data sets; The fitting unit is configured to perform fitting processing on the second preset number of data sets respectively to obtain second preset number of relationship data of the adjusting valve opening and the recovered power of the air compressor; The preset purging data construction unit is configured to construct the preset purging data based on the second preset number of relationship data.

[0019] Further, the matching module comprises: The matching unit is configured to perform matching processing on the real-time air compressor speed based on the second preset number of air compressor speeds to determine a target speed interval corresponding to the real-time air compressor speed; and obtain all relationship data in the target speed interval from the preset purging data as the target corresponding relationship.

[0020] Further, an energy recovery motor is arranged between the turbine and the air compressor; and the device further comprises: The recovery module is configured to perform mechanical energy conversion processing on the air discharged from the cathode of the stack based on the turbine during the shutdown purging process to obtain recovered mechanical energy. The conversion module is configured to perform conversion processing on the recovered mechanical energy based on the energy recovery motor to obtain the target recovered power, and drive the air compressor to operate based on the target recovered power.

[0021] In another aspect, the embodiments of the present application also provide an electronic device, which comprises a processor and a memory. The memory stores at least one instruction or at least one program. The at least one instruction or at least one program is loaded and executed by the processor to implement the shutdown purging method of the fuel cell system as described above.

[0022] In another aspect, the embodiments of the present application also provide a computer readable storage medium, which stores at least one instruction or at least one program. The at least one instruction or at least one program is loaded and executed by the processor to implement the shutdown purging method of the fuel cell system as described above.

[0023] In another aspect, the embodiments of the present application also provide a computer program product, which is executed by the processor to implement the shutdown purging method of the fuel cell system as described above.

[0024] The embodiment of the application provides a kind of fuel cell system's shutdown purging method, device and electronic medium, fuel cell system includes the air compressor being communicated with the gas inlet of cathode of electric pile, the turbine being communicated with the gas outlet of cathode of electric pile, adjusting valve is arranged between gas outlet and turbine, and air compressor is energy recovery type air compressor;The method comprises: when fuel cell system enters shutdown purging state, the real-time air compressor speed of air compressor is acquired;Real-time air compressor speed is matched based on preset purging data, and the target corresponding relationship corresponding to real-time air compressor speed is acquired;Preset purging data represents the corresponding relationship of different adjusting valve opening degree and air compressor recovery power under different air compressor speed;According to target corresponding relationship, adjusting valve opening degree is handled to real-time air compressor speed, and target adjusting valve opening degree is obtained;According to target adjusting valve opening degree, adjusting valve is controlled, so that air compressor reaches target recovery power in shutdown purging process.The method adjusts the opening degree of adjusting valve according to real-time air compressor speed, changes the pressure, flow, temperature of air flowing through energy recovery turbine to adjust the recovery power of energy recovery air compressor, reduces the power consumption of air compressor, and improves the system efficiency of fuel cell system operation output power. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, and the advantages thereof, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0026] Figure 1 It is a structure schematic diagram of a fuel cell system provided by the embodiment of the present application.

[0027] Figure 2 It is a flowchart of a shutdown purging method of a fuel cell system provided by the embodiment of the present application.

[0028] Figure 3 It is a flowchart of an energy recovery method of an air compressor provided by the embodiment of the present application.

[0029] Figure 4 It is a flowchart of a construction method of preset purging data provided by the embodiment of the present application.

[0030] Figure 5 It is a flowchart of a determination method of parameter combination provided by the embodiment of the present application.

[0031] Figure 6 It is a flowchart of an acquisition process of preset purging data provided by the embodiment of the present application.

[0032] Figure 7 is a flowchart of a combination method of preset purging data provided by an embodiment of the present application.

[0033] Figure 8 is a flowchart of a determination method of a target corresponding relationship provided by an embodiment of the present application.

[0034] Figure 9 is a structural diagram of a shutdown purging device of a fuel cell system provided by an embodiment of the present application.

[0035] Figure 10 is a hardware structure block diagram of a server of a shutdown purging method of a fuel cell system provided by an embodiment of the present application. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present application.

[0037] It should be noted that the terms "first", "second", and the like in the specification and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. Therefore, the features with "first", "second" can explicitly or implicitly include one or more features. In the description of the embodiments, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or server including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0038] Please refer to Figure 1 , Figure 1is a structural schematic diagram of a fuel cell system provided by an embodiment of the present application. The fuel cell system comprises a stack, a intercooler, an air compressor, an air filter, a humidifier, a regulating valve, a turbine, a pressure sensor and a flow sensor. Specifically, air enters the cathode of the stack from the air inlet of the cathode of the stack in sequence through the air filter, the air compressor and the intercooler, that is, air is supplied to the cathode of the stack for purging the fuel cell, and the purged air passes through the air outlet of the cathode of the stack in sequence through the regulating valve and the turbine, and is then discharged from the tail discharge outlet of the turbine.

[0039] The first temperature sensor and the flow sensor are arranged on the air pipeline between the humidifier and the regulating valve, and are used for monitoring the temperature and flow of the air entering the regulating valve, respectively. The second temperature sensor is arranged on the tail discharge pipeline of the turbine, and is used for monitoring the temperature of the tail discharge air.

[0040] In order to reduce the proportion of the power consumption of the air compressor in the entire purging process of the fuel cell system, the air compressor is arranged as an energy recovery type air compressor in the embodiment of the present application. The energy recovery type air compressor can recover the waste heat or excess energy generated during the operation of the air compressor, and convert it into usable heat energy or electric energy.

[0041] Need to say, Figure 1 The structure is only schematic, and the shutdown purging method of the fuel cell system provided by the embodiment of the present application is also applicable to fuel cell systems of other structures.

[0042] The following describes a shutdown purging method of a fuel cell system provided by an embodiment of the present application, Figure 2 is a flowchart of the shutdown purging method of the fuel cell system provided by the embodiment of the present application. The present specification provides the method operation steps as described in the embodiment or the flowchart, but more or fewer operation steps can be included based on conventional or non-creative labor. The order of the steps listed in the embodiment is only one of the many execution orders, and does not represent the only execution order. In actual system or fourth server product execution, the method order shown in the embodiment or the drawing can be executed in sequence or in parallel (for example, in a parallel processor or multi-thread processing environment). Specifically, as shown in Figure 2 The method can comprise: S10: When the fuel cell system enters a shutdown purging state, the real-time air compressor speed of the air compressor is obtained.

[0043] In the embodiment of the present application, when the fuel cell system stops running and shuts down, the residual water generated during operation needs to be purged. Therefore, after the fuel cell system stops running, it immediately enters a shutdown purging state, at which time air enters the air compressor from the air filter, and the air compressor starts to run, and the real-time air compressor speed of the air compressor is obtained.

[0044] S30: Perform matching processing on the real-time air compressor speed based on preset purge data to obtain a target corresponding relationship corresponding to the real-time air compressor speed; the preset purge data represents a corresponding relationship between different adjustment valve opening degrees and air compressor recovery power at different air compressor speeds.

[0045] In the embodiments of the present application, the preset purge data includes a corresponding relationship between different adjustment valve opening degrees and air compressor recovery power at different air compressor speeds, and the preset purge data is pre-stored in the fuel cell system. When the fuel cell system is in the shutdown purge state, the real-time data of the fuel cell system is directly processed to match the optimal adjustment valve opening degree. Therefore, when the fuel cell system is in the shutdown purge state, the real-time air compressor speed is matched based on the preset purge data to obtain a target corresponding relationship corresponding to the real-time air compressor speed. The target corresponding relationship is a corresponding relationship between different adjustment valve opening degrees and air compressor recovery power at the real-time air compressor speed.

[0046] The air compressor recovery power refers to the power of converting the excess heat generated during the operation of the air compressor into usable heat energy or electric energy.

[0047] The air compressor recovery power = air compressor power corresponding to the initial adjustment valve opening degree - air compressor power corresponding to the target adjustment valve opening degree.

[0048] S50: Perform adjustment valve opening degree processing on the real-time air compressor speed according to the target corresponding relationship to obtain a target adjustment valve opening degree.

[0049] S70: Control the adjustment valve according to the target adjustment valve opening degree to make the air compressor reach a target recovery power during the shutdown purge process.

[0050] In the embodiments of the present application, the target adjustment valve opening degree refers to the adjustment valve opening degree corresponding to the target recovery power at the real-time air compressor speed. The target recovery power refers to the maximum recovery power that the air compressor can reach at the real-time speed. Therefore, the adjustment valve opening degree corresponding to the maximum air compressor recovery power can be obtained according to the target corresponding relationship as the target adjustment valve opening degree. Then, the fuel cell system controls the opening degree of the adjustment valve to be adjusted to the target adjustment valve opening degree, thereby adjusting the air parameters through the turbine to make the air compressor reach the target recovery power during the shutdown purge process.

[0051] Optionally, the above-mentioned air parameters include air flow, air temperature and air pressure.

[0052] Optionally, the target adjustment valve opening degree is any value between 80% and 30%.

[0053] The embodiment of the present application adjusts the opening of the adjusting valve according to the real-time air compressor rotating speed, changes the pressure, flow and temperature of the air flowing through the energy recovery turbine, adjusts the recovery power of the energy recovery air compressor, reduces the power consumption of the air compressor, and improves the system efficiency of the fuel cell system operation output power.

[0054] As an optional implementation, as shown in Figure 1 The turbine and the air compressor are further provided with an energy recovery motor; the embodiment of the present application further provides an energy recovery method of an air compressor, as shown in Figure 3 The method further includes: S001: In the shutdown purging process, the air discharged from the cathode of the fuel cell stack is subjected to mechanical energy conversion processing based on the turbine, to obtain recovered mechanical energy; S003: The recovered mechanical energy is subjected to conversion processing based on the energy recovery motor, to obtain the target recovery power, and the air compressor is driven to operate based on the target recovery power.

[0055] In the embodiment of the present application, as shown in Figure 1 The fuel cell system further includes an energy recovery motor, which is arranged between the turbine and the air compressor; the energy recovery motor is used to transfer part of the kinetic energy in the turbine to the air compressor, to realize energy recovery of the air compressor. Specifically, the air compressor is responsible for compressing air and sending it into the cathode of the fuel cell stack in the fuel cell system, the air in the cathode of the fuel cell stack is discharged through the turbine exhaust system, and the turbine functions include conversion of the kinetic energy and pressure energy of the discharged air into mechanical energy, i.e. to obtain recovered mechanical energy, because the air flowing through the turbine will push the turbine blades to rotate due to the change of its pressure and speed, thereby generating mechanical work. Then the energy recovery motor is used to convert the mechanical energy generated by the turbine into electrical energy, i.e. to convert the recovered mechanical energy into the target recovery power, and then transmit it to the motor of the air compressor through the circuit, to provide power for the air compressor. This power recovery and reuse mode can reduce the power consumption ratio of the air compressor in the entire fuel cell system, and improve the system efficiency in the shutdown purging process.

[0056] As an optional implementation, as shown in Figure 4 The embodiment of the present application further provides a method for constructing preset purging data, which includes the following steps: S201: Obtain the preset rotating speed range of the air compressor and the preset opening range of the adjusting valve.

[0057] In the embodiments of the present application, the preset speed range refers to the speed running range of the air compressor in the actual shutdown purging process, which can be the preset speed range of the air compressor and also included in the preset speed range; the preset opening range refers to the opening range of the regulating valve in the actual shutdown purging process, which can be the preset opening range of the regulating valve and also included in the preset opening range.

[0058] Optionally, the preset speed range can be 100 rpm-80000 rpm, and in actual application, the preset speed range is determined according to different air compressors.

[0059] Optionally, the preset opening range is 0-100%, and preferably, the preset opening range is 10%-80%.

[0060] S203: parameter combination processing is performed on the air compressor speed in the preset speed range and the opening of the regulating valve in the preset opening range to obtain a first preset number of parameter combinations; the parameter combination is a combination of different air compressor speeds and corresponding regulating valve openings.

[0061] In the embodiments of the present application, a plurality of air compressor speeds and a plurality of regulating valve openings are selected from the preset speed range for parameter combination, and the specific combination method is that any selected air compressor speed is combined with all selected regulating valve openings, thereby obtaining a first preset number of parameter combinations.

[0062] Optionally, the selection of the plurality of air compressor speeds and the plurality of regulating valve openings can be equal-interval sampling or non-equal-interval sampling.

[0063] Optionally, the number of selected air compressor speeds is generally greater than or equal to 5, and the number of selected regulating valve openings is generally greater than or equal to 5.

[0064] As an optional implementation, the embodiments of the present application provide a method for determining a parameter combination, as shown in Figure 5 The method comprises: S2031: interval sampling of the preset speed range is performed based on a preset interval speed to obtain a second preset number of air compressor speeds.

[0065] In the embodiments of the present application, when equal-interval sampling is adopted, interval sampling of the preset speed range is performed based on a preset interval speed to obtain a second preset number of air compressor speeds.

[0066] The preset interval rotation speed is determined according to the preset rotation speed range, and the principle is that the difference between the maximum value and the minimum value in the preset rotation speed range can be divided by the preset interval rotation speed, so that the second preset number of air compressor rotation speeds obtained at equal intervals can be ensured. For example, the preset rotation speed range can be selected as 30000 rpm-50000 rpm, and the preset interval rotation speed can be selected as 5000 rpm, 1000 rpm, 2000 rpm, etc. In order to improve the accuracy of the preset relationship data obtained finally, the smaller the preset interval rotation speed is, the better.

[0067] S2033: The preset opening range is sampled at a preset opening interval to obtain a third preset number of regulating valve openings.

[0068] In the embodiment of the application, when equal-interval sampling is used, the preset opening range is sampled at a preset opening interval to obtain a third preset number of regulating valve openings.

[0069] The preset opening interval is determined according to the preset opening range, and the principle is that the difference between the maximum value and the minimum value in the preset opening range can be divided by the preset opening interval. For example, when the preset opening range is selected as 30%-80%, the preset opening interval can be selected as any value in 2%, 5%, 10%, and when 10% is selected, the third preset number of regulating valve openings includes 80%, 70%, 60%, 50%, 40%, and 30%.

[0070] S2035: The second preset number of air compressor rotation speeds and the third preset number of regulating valve openings are combined to obtain the first preset number of parameter combinations.

[0071] In the embodiment of the application, Cartesian product is used for parameter combination. Specifically, Cartesian product is used to describe all possible ordered pair combinations in two sets. For example, assuming that the second preset number of air compressor rotation speeds is represented by set A, and the third preset number of regulating valve openings is represented by set B, set A includes elements a1, a2, …, a n , and set B includes elements b1, b2, …, b m , then the Cartesian product AxB of set A and set B is a new set, which contains all possible ordered pairs (a i , b j ), where a i is an element in set A, and b j is an element in set B. The mathematical representation is as follows: .

[0072] The above embodiment introduces that first preset number of parameter combinations are obtained by equally spaced sampling on the preset speed range and the preset opening range, and the parameter combinations are combined by using Cartesian product, the first preset number of parameter combinations are used for parameter test, and preset purging data can be established. It should be noted that non-equally spaced sampling can also be adopted, for example, the following method can be adopted: 1. Obtain the running frequency of each speed in the preset speed range, where the running frequency is obtained according to the running data in the historical shutdown purging process.

[0073] 2. Prioritize the speeds according to the running frequency of each speed, and then non-equally spaced sampling is performed according to the priority.

[0074] Specifically, first, the priority rule is determined: the higher the running frequency, the higher the priority, and the two end values of the preset speed range are fixed sampling points. Secondly, the priority is calculated according to the above rule and sorted according to the priority corresponding to each speed. Then the total sampling number is determined, in order to make the sampling points cover the entire preset speed range, the sampling number in the first 50%-100% points in the priority sorting is defined as: total sampling number x (70%-80%), and the remaining sampling is performed in other points, so that the second preset number of air compressor speeds are obtained.

[0075] The sampling of the regulating valve opening can also be performed according to the above method.

[0076] S205: According to the first preset number of parameter combinations, control the fuel cell combination to perform first preset number of shutdown purging on the fuel cell, and determine the recovery power corresponding to each of the first preset number of parameter combinations in the shutdown purging process.

[0077] In the embodiment of the application, the fuel cell system is controlled to perform shutdown purging on the fuel cell according to the first preset number of parameter combinations, and the recovery power of the air compressor in each purging process is recorded. Specifically, the recovery power can be calculated according to the ratio of the power output by the energy recovery motor and the output power of the air compressor.

[0078] S207: The recovery power corresponding to each of the first preset number of parameter combinations is constructed with the first preset number of parameter combinations to obtain the preset purging data.

[0079] In the embodiment of the application, the data set is performed according to the first preset number of parameter combinations and the recovery power corresponding to each of the first preset number of parameter combinations, so that the recovery power corresponding to each of the different regulating valve openings under different speeds, i.e., the preset purging data, can be obtained.

[0080] The embodiment of the present application controls the fuel cell combination to perform first preset number of times of purging according to the constructed parameter combinations, thereby constructing preset purging data according to the parameter combinations and respective corresponding recovery powers, so that the fuel cell system can adjust the opening degree of the adjusting valve according to the real-time air compressor rotating speed, changes the pressure, flow and temperature of the air flowing through the energy recovery turbine to adjust the recovery power of the energy recovery air compressor, reduces the power consumption of the air compressor, and improves the system efficiency of the fuel cell system operation output power.

[0081] As an optional implementation manner, as shown in Figure 6 In the step S205, the first preset number of times of shutdown purging of the fuel cell are performed according to the first preset number of parameter combinations, and the respective corresponding recovery powers of the first preset number of parameter combinations in the shutdown purging process are determined, which includes: S2051: performing sorting processing on the first preset number of parameter combinations according to the size relationship of the second preset number of air compressor rotating speeds and the size relationship of the third preset number of adjusting valve opening degrees, to obtain sorted parameter combinations; S2053: taking the parameter combination at the first position in the sorted parameter combinations as a current parameter combination; S2055: controlling the fuel cell combination to perform shutdown purging on the fuel cell according to the current parameter combination, and determining a current recovery power corresponding to the current parameter combination in the shutdown purging process; S2057: removing the current parameter combination from the sorted parameter combinations to obtain new sorted parameter combinations, and re-determining the parameter combination at the first position in the new sorted parameter combinations as the current parameter combination; S2059: repeating the operation of controlling the fuel cell combination to perform shutdown purging on the fuel cell according to the current parameter combination until the parameter combination at the first position in the new sorted parameter combinations is re-determined as the current parameter combination, until the first preset number of times of shutdown purging is completed.

[0082] In the step S2051, first, the parameter combinations are sorted according to the size relationship of the second preset number of air compressor rotating speeds and the size relationship of the third preset number of adjusting valve opening degrees, and the specific sorting method is: first, the first preset number of parameter combinations are sorted according to the second preset number of air compressor rotating speeds from small to large, and when the air compressor rotating speeds are the same, the third preset number of adjusting valve opening degrees are sorted from large to small, thereby obtaining the sorted parameter combinations.

[0083] Optionally, in step S2051, the first preset number of parameter combinations can also be sorted according to the second preset number of air compressor speeds from large to small, and when the air compressor speed is the same, sorted according to the third preset number of adjustment valve openings from large to small, thereby obtaining the sorted parameter combinations.

[0084] In steps S2053-S2055, the parameter combination at the first position in the sorted parameter combinations is first taken as the current parameter combination, the fuel cell system is controlled to perform a shutdown purge on the fuel cell according to the current parameter combination, and the current recovery power corresponding to the current parameter combination is recorded.

[0085] In step S2057, the current parameter combination is removed from the sorted parameter combinations after each shutdown purge is completed, a new sorted parameter combination is obtained, and the parameter combination at the first position in the new sorted parameter combinations is taken as the current parameter combination again.

[0086] In step S2059, steps S2055-S2057 are repeated until all parameter combinations in the first preset number of parameter combinations are executed, and the first preset number of shutdown purges are completed.

[0087] In an optional embodiment, in step S2059, the above-mentioned repeating of the operation of controlling the fuel cell system to perform a shutdown purge on the fuel cell according to the current parameter combination until the parameter combination at the first position in the new sorted parameter combinations is determined as the current parameter combination again until the first preset number of shutdown purges are completed includes: When the air compressor is in a surge condition, the parameter combinations with the same air compressor speed as the current parameter combination in the new sorted parameter combinations and the current parameter combination are both taken as unsuitable parameter combinations, the unsuitable parameter combinations are removed from the new sorted parameter combinations, and the new sorted parameter combinations after the removal of the unsuitable parameter combinations are determined as the new sorted parameter combinations again.

[0088] It should be noted that some of the first preset number of parameter combinations may not be suitable for the fuel cell system to perform shutdown purging, and therefore, in step S2059, when the air compressor speed in the parameter combination is unchanged, the regulating valve opening degree is reduced according to the preset opening degree interval and shutdown purging is performed, and when air compressor surge occurs, the regulating valve opening degree is stopped from being continuously reduced, and at different air compressor speeds, the regulating valve opening degree corresponding to the occurrence of air compressor surge is also different. Because the sorting of the parameter combinations provided in the embodiments of the present application is based on the principle that the regulating valve opening degree is from large to small at the same air compressor speed, when surge occurs at any regulating valve opening degree, the corresponding surge regulating valve opening degree and the parameter combination in which the regulating valve opening degree is smaller than the surge regulating valve opening degree at the same speed are directly taken as the unsuitable parameter combination, and the parameter combination does not need to be executed subsequently.

[0089] The above-mentioned air compressor surge refers to an unstable working condition that occurs when the flow rate is reduced to a certain extent during operation. At this time, the airflow oscillates violently inside the compressor, causing the machine to produce strong vibration and noise, and the pressure and flow rate also fluctuate greatly.

[0090] In the embodiments of the present application, the fuel cell is shutdown purged in the order of gradually reducing the regulating valve opening degree at the same speed, so that the air compressor recovery power corresponding to each parameter combination is obtained, laying a data foundation for establishing a preset purging model, and the shutdown purging is performed in the order of gradually reducing the regulating valve opening degree, so that the unsuitable parameter combination can be removed when air compressor surge occurs, reducing the test amount and ensuring the safe operation of the air compressor.

[0091] As an optional implementation, the embodiments of the present application also provide a method for determining a current recovery power, which comprises: controlling the fuel cell to perform shutdown purging according to the current parameter combination, and obtaining real-time temperature data and real-time flow rate data during shutdown purging; processing the real-time temperature data and the real-time flow rate data to obtain the current recovery power.

[0092] In the embodiments of the present application, as shown in Figure 1 The fuel cell is provided with a first temperature sensor, a flow rate sensor and a second temperature sensor. The real-time temperature data includes real-time first temperature obtained from the first temperature sensor, real-time flow rate obtained from the flow rate sensor and real-time second temperature obtained from the second sensor. The process of determining the current recovery power according to the real-time temperature data and the real-time flow rate data can be realized by the following two methods: Method one: assuming that the initial adjustment valve opening is Q1% when entering the purge state, and the target adjustment valve opening is Q2% after adjustment, then the air compressor recovery power P 回 can be determined by the air compressor power consumption at two openings: P 回 = air compressor power consumption P1 when the adjustment valve opening is Q1% - air compressor power consumption P2 when the throttle valve opening is Q2%.

[0093] This formula shows that by adjusting the opening of the adjustment valve, the power consumption of the air compressor can be reduced, and this reduced power is the recovered energy. In other words, by optimizing the opening of the adjustment valve, the compressed air generated by the air compressor can be more efficiently utilized, thereby reducing energy waste.

[0094] Specifically, the power consumption of the air compressor is calculated by the following formula: ; In the formula, represents the mass flow rate of air (kg / s), which is obtained from the flow sensor; T2 is the second real-time temperature, representing the temperature after passing through the turbine (K); P1 is the pressure before passing through the turbine (Pa), P2 is the pressure after passing through the turbine (Pa), η is the isentropic efficiency of the turbine, which is a fixed value determined according to the turbine; R is the ideal gas constant.

[0095] Among them, the pressure ratio is determined according to the ideal gas state equation and the relationship of isentropic process. For isentropic process, there is the following relationship between pressure ratio and temperature ratio: ; γ is the specific heat ratio of air, and for air, γ≈1.4.

[0096] Method two: since the energy recovery of the air compressor is completed by the turbine, and the turbine delivers the recovered power to the air compressor through the energy recovery motor, the recovered power can be calculated by the following formula: ; In the embodiments of the present application, by obtaining the flow parameter and the temperature parameter, the air compressor power at different adjustment valve openings and the corresponding recovered power can be calculated, so as to determine the target adjustment valve opening to maximize the air compressor recovery power and reduce the power consumption ratio of the air compressor in the entire fuel cell system.

[0097] As an optional implementation, as shown in Figure 7 , in the above step S207, the first preset number of parameter combinations are constructed and processed to obtain the preset purge data, including: S2071: Constructing a second preset number of data sets according to the first preset number of parameter combinations and the recovery power corresponding to each of the first preset number of parameter combinations, according to the same air compressor speed strategy. S2073: Respectively fitting the second preset number of data sets to obtain a second preset number of relationship data between the adjusting valve opening and the air compressor recovery power. S2075: Constructing the preset purge data based on the second preset number of relationship data.

[0098] In the above step S2071, the parameter combinations with the same air compressor speed and the corresponding recovery power are respectively constructed into data sets, and each data set represents the recovery power corresponding to different adjusting valve openings at a specific air compressor speed.

[0099] In the above step S2073, each data set is fitted separately, and the fitting method can use the least squares method. When the adjusting valve opening and the recovery power are linearly related, the specific fitting process can include: (1) Mark the data set at a specific speed as data points (A1, B1), (A2, B2), …, (A n , B n ), A represents the adjusting valve opening, and B represents the recovery power.

[0100] (2) Calculate the average of A and B to obtain and .

[0101] (3) Solve the coefficients. Here, because the air compressor speed is fixed, the only variable is the adjusting valve opening A. Because the variable is the recovery power B, the fitting will obtain a linear function f(A)=aA+b, where a and b are undetermined coefficients.

[0102] The undetermined coefficients a and b are solved by the following formula: ; ; Finally, f(A)=aA+b is obtained.

[0103] The above method is fitted for a second preset number of times to obtain a second preset number of relationship data.

[0104] In the above step S2075, the relationship data at each air compressor speed is stored in the control system of the fuel cell system as the preset purge data.

[0105] It should be noted that the above method is a fitting process assuming that the adjustment valve opening degree and the recovery power are in a linear relationship. If the two are in a nonlinear relationship, a least squares nonlinear fitting is used. Specifically, the existing fitting method in the prior art can be used, and details are not repeated here.

[0106] In the embodiments of the present application, by fitting the data of different adjustment valve opening degrees and corresponding air compressor recovery powers under the same speed, the relationship data of adjustment valve opening degree and air compressor speed under different speeds is obtained, and a preset purge model is constructed for subsequent optimization of the adjustment valve opening degree in the purge process of the fuel cell system. The recovery power of the air compressor can be maximized, and the power consumption ratio of the air compressor in the fuel cell system can be reduced.

[0107] As an optional implementation, as shown in Figure 8 In the step S50, the real-time air compressor speed is matched based on the preset purge data to obtain a target corresponding relationship corresponding to the real-time air compressor speed, which includes: S501: The real-time air compressor speed is matched based on the second preset number of air compressor speeds to determine a target speed interval corresponding to the real-time air compressor speed; S503: All relationship data in the target speed interval are obtained from the preset purge data as the target corresponding relationship.

[0108] In the embodiments of the present application, in the shutdown purge process, the target speed interval in which the real-time purge speed is located is first determined in the preset purge model. For example, the preset purge model includes relationship data of air compressor speeds at 30000 rpm, 33000 rpm, 35000 rpm, etc. The real-time air compressor speed is 32300 rpm, and the target speed interval is determined as 30000 rpm-33000 rpm.

[0109] Then, the relationship data corresponding to 30000 rpm and the relationship data corresponding to 33000 rpm are obtained as the target corresponding relationship for analyzing the adjustment valve opening degree under the real-time speed to maximize the corresponding target recovery power.

[0110] Optionally, in the case where the target corresponding relationship includes all relationship data in the target speed interval, the method for obtaining the target adjustment valve opening degree in the step S50 uses an interpolation method, specifically, a linear interpolation method: Suppose the target corresponding relationship includes: (1) when the air compressor speed is C1, the adjusting valve opening A and the air compressor recovery power B satisfy f1(B) = a1A + b1; (2) when the air compressor speed is C2, the adjusting valve opening A and the air compressor recovery power B satisfy f2(B) = a2A + b2. It should be noted that a1, a2, b1 and b2 are known here.

[0111] When the real-time air compressor speed is C3, and C1≤C3≤C2, for the linear relationship between the real-time air compressor recovery power B and the adjusting valve opening A at the real-time air compressor speed C3, it is obtained that when the air compressor speed is C3, the adjusting valve opening A and the air compressor recovery power B satisfy f3(B) = a3A + b3, and a3 and b3 are unknown.

[0112] Therefore, a3 and b3 can be solved by using the following formula: ; ; Then the following is obtained: ; According to the above relationship, the value of the adjusting valve opening AA when the air compressor recovery power B is maximum can be determined as the target adjusting valve opening.

[0113] In the embodiment of the application, the relationship data corresponding to the real-time air compressor speed is obtained by the interpolation method, and then the target adjusting valve opening corresponding to the target recovery power at the real-time air compressor speed is obtained, so that the adjusting valve opening can be controlled according to the target adjusting valve opening to reduce the power consumption ratio of the air compressor.

[0114] On the other hand, as shown in Figure 9 , the embodiment of the application also provides a shutdown purging device of a fuel cell system, the fuel cell system including an air compressor in communication with a gas inlet of a cathode of an electric pile, and a turbine in communication with a gas outlet of the cathode of the electric pile, an adjusting valve being arranged between the gas outlet and the turbine, and the air compressor being an energy recovery type air compressor; the device including: The acquisition module 301 is configured to acquire a real-time air compressor speed of the air compressor when the fuel cell system enters a shutdown purging state. The matching module 303 is configured to perform matching processing on the real-time air compressor speed based on preset purging data to obtain a target corresponding relationship corresponding to the real-time air compressor speed; the preset purging data representing corresponding relationship data of different adjusting valve openings and air compressor recovery powers under different air compressor speeds. The processing module 305 is configured to perform adjusting valve opening processing on the real-time air compressor speed according to the target corresponding relationship to obtain a target adjusting valve opening. The control module 307 is configured to control the regulating valve according to the target regulating valve opening degree, so as to adjust the air parameter passing through the turbine, and to make the air compressor reach the target recovered power in the shutdown purging process.

[0115] Further, the device further comprises: The first obtaining unit is configured to obtain a preset rotating speed range of the air compressor and a preset opening degree range of the regulating valve. The parameter combination unit is configured to perform parameter combination processing on the air compressor rotating speed in the preset rotating speed range and the regulating valve opening degree in the preset opening degree range, to obtain a first preset number of parameter combinations; the parameter combination is a combination of different air compressor rotating speeds and corresponding regulating valve opening degrees. The control unit is configured to control the fuel cell combination to perform a first preset number of times of shutdown purging on the fuel cell according to the first preset number of parameter combinations, respectively, and to determine the recovered power corresponding to each of the first preset number of parameter combinations in the shutdown purging process. The construction unit is configured to perform construction processing on the recovered power corresponding to each of the first preset number of parameter combinations and the first preset number of parameter combinations, to obtain the preset purging data.

[0116] Further, the parameter combination unit comprises: The first sampling unit is configured to perform rotating speed interval sampling on the preset rotating speed range based on preset interval rotating speeds, to obtain a second preset number of air compressor rotating speeds. The second sampling unit is configured to perform opening degree interval sampling on the preset opening degree range based on preset interval opening degrees, to obtain a third preset number of regulating valve opening degrees. The combination unit is configured to perform combination processing on the second preset number of air compressor rotating speeds and the third preset number of regulating valve opening degrees, to obtain the first preset number of parameter combinations.

[0117] Further, the control unit comprises: The sorting unit is configured to perform sorting processing on the first preset number of parameter combinations according to the size relationship of the second preset number of air compressor rotating speeds and the size relationship of the third preset number of regulating valve opening degrees, to obtain sorted parameter combinations. The determination unit is configured to take the parameter combination in the first place in the sorted parameter combinations as a current parameter combination. The purging unit is configured to control the fuel cell combination to perform shutdown purging on the fuel cell according to the current parameter combination, and to determine the current recovered power corresponding to the current parameter combination in the shutdown purging process. a reordering unit, configured to remove the current parameter combination from the ordered parameter combinations to obtain new ordered parameter combinations, and re-determine a parameter combination ranked first in the new ordered parameter combinations as the current parameter combination; a repeating unit, configured to repeat the operation of controlling the fuel cell combination to perform shutdown purging on the fuel cell according to the current parameter combination until a first preset number of shutdown purging operations are completed.

[0118] Further, the purging unit comprises: a second obtaining unit, configured to control the fuel cell combination to perform shutdown purging on the fuel cell according to the current parameter combination, and obtain real-time temperature data and real-time flow data during shutdown purging; a recovered power determining unit, configured to perform recovered power processing on the real-time temperature data and the real-time flow data to obtain the current recovered power.

[0119] Further, the constructing unit comprises: a data set constructing unit, configured to perform data set constructing processing on the first preset number of parameter combinations and the recovered power corresponding to each of the first preset number of parameter combinations according to a same air compressor speed strategy to obtain a second preset number of data sets; a fitting unit, configured to perform fitting processing on the second preset number of data sets respectively to obtain a second preset number of relationship data of the adjusting valve opening degree and the air compressor recovered power; a preset purging data constructing unit, configured to construct the preset purging data based on the second preset number of relationship data.

[0120] Further, the matching module comprises: a matching unit, configured to perform matching processing on the real-time air compressor speed based on the second preset number of air compressor speeds to determine a target speed interval corresponding to the real-time air compressor speed, and obtain all relationship data in the target speed interval from the preset purging data as the target corresponding relationship.

[0121] Further, an energy recovery motor is arranged between the turbine and the air compressor; and the device further comprises: a recovery module, configured to perform mechanical energy conversion processing on air discharged from the cathode of the stack based on the turbine during shutdown purging to obtain recovered mechanical energy; a conversion module, configured to perform conversion processing on the recovered mechanical energy based on the energy recovery motor to obtain the target recovered power, and drive the air compressor to operate based on the target recovered power.

[0122] It should be noted that the embodiment of the fuel cell system shutdown purging device provided in the present application is based on the same inventive concept as the above-mentioned embodiment of the fuel cell system shutdown purging method.

[0123] The present application also provides an electronic device for fuel cell system shutdown purging, which comprises a processor and a memory, and the memory stores at least one instruction or at least one program, and the at least one instruction or at least one program is loaded and executed by the processor to implement the fuel cell system shutdown purging method according to any one of the above-mentioned embodiments.

[0124] The present application also provides a computer readable storage medium, which can be arranged in a terminal to save at least one instruction or at least one program for implementing the fuel cell system shutdown purging method in the method embodiment, and the at least one instruction or at least one program is loaded and executed by the processor to implement the fuel cell system shutdown purging method according to the above-mentioned method embodiment.

[0125] Optionally, in the present application, the storage medium can be located in at least one of the plurality of network servers of the computer network. Optionally, in the present application, the storage medium can include, but is not limited to, a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0126] The memory of the present application can be used to store software programs and modules, and the processor can execute various function application programs and data processing by running the software programs and modules stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, application programs required by functions, etc.; the data storage area can store data created according to the use of the device, etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state memory device. Accordingly, the memory can also include a memory controller to provide access of the processor to the memory.

[0127] This application also provides a computer program product or computer program that includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the shutdown purging method for a fuel cell system provided in the above-described method embodiments.

[0128] The methods and embodiments provided in this application can be executed on a terminal, computer terminal, server, or similar computing device. Taking running on a server as an example, Figure 10 This is a hardware structure block diagram of a server for a shutdown purging method of a fuel cell system according to an exemplary embodiment. (e.g.) Figure 10 As shown, the server 400 can vary significantly due to different configurations or performance. It may include one or more Central Processing Units (CPUs) 410 (CPUs 410 may include, but are not limited to, microprocessors (MCUs) or programmable logic devices (FPGAs), a memory 430 for storing data, and one or more storage media 420 (e.g., one or more mass storage devices) for storing application programs 423 or data 422. The memory 430 and storage media 420 may be temporary or persistent storage. The program stored in the storage media 420 may include one or more modules, each module may include a series of instruction operations on the server. Furthermore, the CPU 410 may be configured to communicate with the storage media 420 and execute the series of instruction operations stored in the storage media 420 on the server 400. Server 400 may also include one or more power supplies 460, one or more wired or wireless network interfaces 450, one or more input / output interfaces 440, and / or one or more operating systems 421, such as Windows Server™, Mac OS X™, Unix™, Linux™, Free BSD™, etc.

[0129] The input / output interface 440 can be used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the communication provider of server 400. In one example, the input / output interface 440 includes a network interface controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the input / output interface 440 may be a radio frequency (RF) module used for wireless communication with the Internet.

[0130] Those skilled in the art can understand that Figure 10 The structure shown is merely schematic, and does not limit the structure of the electronic device described above. For example, the server 400 can further include more or fewer components than those shown, or have a different configuration from that shown. Figure 10 The structure shown is merely schematic, and does not limit the structure of the electronic device described above. For example, the server 400 can further include more or fewer components than those shown, or have a different configuration from that shown. Figure 10 The structure shown is merely schematic, and does not limit the structure of the electronic device described above. For example, the server 400 can further include more or fewer components than those shown, or have a different configuration from that shown.

[0131] It should be noted that the above-mentioned order of the embodiments of the present application is merely for description, and does not represent the advantages and disadvantages of the embodiments. The above-mentioned specific embodiments of the present application are described. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that in the embodiments and still achieve the desired result. In addition, the processes depicted in the drawings do not necessarily require the specific order or sequential order shown to achieve the desired result. In some embodiments, multi-task processing and parallel processing are possible or can be advantageous.

[0132] Each of the embodiments in the present specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments. In particular, for the device and server embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiments.

[0133] Those skilled in the art can understand that all or part of the steps of the above-mentioned embodiments can be completed by hardware, or by program instructing relevant hardware, and the program can be stored in a computer readable storage medium. The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk.

[0134] The above is only the preferred embodiment of the present application, and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A shutdown purging method for a fuel cell system, the fuel cell system comprising an air compressor connected to an air inlet of the fuel cell stack cathode and a turbine connected to an air outlet of the fuel cell stack cathode, wherein a regulating valve is provided between the air outlet and the turbine, characterized in that, The air compressor is an energy recovery type air compressor; the method includes: When the fuel cell system enters the shutdown purging state, the real-time air compressor speed of the air compressor is obtained; The real-time air compressor speed is matched based on preset purging data to obtain the target correspondence with the real-time air compressor speed; the preset purging data represents the correspondence between different regulating valve openings and air compressor recovery power at different air compressor speeds; Based on the target correspondence, the real-time air compressor speed is adjusted to regulate the valve opening to obtain the target regulating valve opening. The regulating valve is controlled according to the target regulating valve opening, so that the air compressor achieves the target power recovery during the shutdown purging process.

2. The method according to claim 1, characterized in that, The method further includes: Obtain the preset speed range of the air compressor and the preset opening range of the regulating valve; The air compressor speed within the preset speed range and the regulating valve opening within the preset opening range are combined to obtain a first preset number of parameter combinations; the parameter combinations are different combinations of the air compressor speed and the corresponding regulating valve opening. According to the first preset number of parameter combinations, the fuel cell combination is controlled to perform a first preset number of shutdown purging cycles on the fuel cell, and the recovery power corresponding to each of the first preset number of parameter combinations during the shutdown purging process is determined. The recovery power corresponding to each of the first preset number of parameter combinations is combined with the first preset number of parameter combinations to construct the preset purging data.

3. The method according to claim 2, characterized in that, The parameter combination processing of the air compressor speed within the preset speed range and the regulating valve opening within the preset opening range yields a first preset number of parameter combinations, including: Based on the preset interval speed, the preset speed range is sampled at intervals to obtain a second preset number of air compressor speeds; Based on the preset interval opening, the preset opening range is sampled at intervals to obtain a third preset number of regulating valve openings; The second preset number of air compressor speeds and the third preset number of regulating valve openings are combined to obtain the first preset number of parameter combinations.

4. The method according to claim 3, characterized in that, The step of controlling the fuel cell assembly to perform a first preset number of shutdown purging cycles on the fuel cell according to the first preset number of parameter combinations, and determining the recovery power corresponding to each of the first preset number of parameter combinations during the shutdown purging process, includes: Based on the relationship between the second preset number of air compressor speeds and the relationship between the third preset number of regulating valve openings, the first preset number of parameter combinations are sorted to obtain sorted parameter combinations. The parameter combination that ranks first in the sorted parameter combinations is taken as the current parameter combination. The fuel cell assembly is controlled to perform shutdown purging of the fuel cell according to the current parameter combination, and the current recovery power corresponding to the current parameter combination is determined during the shutdown purging process; Remove the current parameter combination from the sorted parameter combinations to obtain a new sorted parameter combination, and re-determine the parameter combination that is first in the sorted new parameter combination as the current parameter combination; Repeat the operation of controlling the fuel cell combination to shut down and purge the fuel cell according to the current parameter combination, until the first preset number of shutdown purgings are completed.

5. The method according to claim 4, characterized in that, The step of controlling the fuel cell assembly to perform shutdown purging of the fuel cell according to the current parameter combination, and determining the current recovery power corresponding to the current parameter combination during the shutdown purging process, includes: The fuel cell assembly is controlled to perform shutdown purging of the fuel cell according to the current parameter combination, and real-time temperature data and real-time flow data are acquired during the shutdown purging process. The real-time temperature data and the real-time flow data are processed to recover power, thereby obtaining the current recovered power.

6. The method according to claim 4, characterized in that, The step of constructing the preset purging data by combining the recovery power corresponding to each of the first preset number of parameter combinations with the first preset number of parameter combinations includes: For the first preset number of parameter combinations and the recovery power corresponding to each of the first preset number of parameter combinations, the dataset is constructed and processed according to the strategy of the same air compressor speed to obtain a second preset number of datasets; The second preset number of datasets are fitted to obtain the relationship data between the second preset number of regulating valve openings and the air compressor recovery power. Based on the second preset number of relational data, the preset purging data is constructed.

7. The method according to claim 6, characterized in that, The step of matching the real-time air compressor speed with preset purging data to obtain the target correspondence relationship corresponding to the real-time air compressor speed includes: The real-time air compressor speed is matched based on the second preset number of air compressor speeds to determine the target speed range corresponding to the real-time air compressor speed; all relational data within the target speed range are obtained from the preset purging data as the target correspondence.

8. The method according to claim 1, characterized in that, An energy recovery motor is also provided between the turbine and the air compressor; the method further includes: During the shutdown purging process, the turbine performs mechanical energy conversion on the air discharged from the cathode of the fuel cell stack to obtain recovered mechanical energy. The energy recovery motor converts the recovered mechanical energy to obtain the target recovered power, and drives the air compressor to operate based on the target recovered power.

9. A shutdown purging device for a fuel cell system, the fuel cell system comprising an air compressor connected to an air inlet of the fuel cell stack cathode, and a turbine connected to an air outlet of the fuel cell stack cathode, wherein a regulating valve is provided between the air outlet and the turbine, characterized in that, The air compressor is an energy recovery type air compressor; the device includes: The acquisition module is used to acquire the real-time air compressor speed of the air compressor when the fuel cell system enters the shutdown purging state; The matching module is used to perform matching processing on the real-time air compressor speed based on preset purging data to obtain the target correspondence relationship with the real-time air compressor speed; the preset purging data represents the correspondence data between different regulating valve openings and air compressor recovery power at different air compressor speeds; The processing module is used to process the real-time air compressor speed adjustment valve opening according to the target correspondence relationship to obtain the target adjustment valve opening. The control module is used to control the regulating valve according to the target regulating valve opening, so as to adjust the air parameters passing through the turbine, so that the air compressor achieves the target recovery power during the shutdown purging process.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one instruction or at least one program, which is loaded and executed by a processor to implement the shutdown purging method of the fuel cell system as described in any one of claims 1 to 8.

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