Power determination method, device, electronic equipment and vehicle

Abstract

The present application relates to a power determination method, device, electronic device and vehicle, and relates to the field of fuel cell technology. At least it solves the technical problem in the related art that the accuracy of determining the output power of the fuel cell is low and the effect of managing the energy of the fuel cell is poor. It includes: obtaining the operating cost parameters of the vehicle and the performance attenuation parameters of the fuel cell, the operating cost parameters are used to indicate the energy consumption cost when the vehicle is running; based on the operating cost parameters, determining the relationship between the total cost consumed by the vehicle during operation and the variable parameters, the variable parameters include: the net output power of the fuel cell, the rate of change of the net output power and the output current of the fuel cell; based on the performance attenuation parameters, determining the value range of the variable parameters; based on the relationship between the total cost and the variable parameters and the value range of the variable parameters, determining the target net output power of the fuel cell. The present application can improve the accuracy of determining the output power of the fuel cell.

Description

Technical Field

[0001] The present application relates to the field of fuel cell technology, and in particular to a power determination method, device, electronic equipment, and vehicle. Background Art

[0002] With the rapid development and popularization of new energy vehicles, new energy vehicles have become an important means of transportation for achieving sustainable development in the transportation sector. Among them, fuel cells are the core components of new energy vehicles. Fuel cells have the advantages of zero emissions, high efficiency, and fast refueling (such as hydrogen) refueling speed, making them an important direction for the development of new energy vehicles. However, during the operation of the vehicle power system, the output current of the fuel cell depends on the output power of the fuel cell, and the requested value of the fuel cell output power (i.e., the requested power) depends on the power demand of the vehicle and the energy management strategy allocation method. Therefore, it is impossible to obtain the output voltage at each current point within the current operating range by controlling the output current of the fuel cell during operation, thereby obtaining an accurate polarization curve. Even if the function of scanning at set current points is implemented in the fuel cell controller (FCCU), there is a possibility that the output power of the fuel cell is not controlled by the vehicle control unit (VCU), and the power output of the fuel cell exceeds the limit during the polarization curve scanning, causing the power battery to overcharge. Therefore, the energy management effect of the fuel cell is poor.

[0003] In related technologies, the estimated health state SOH value can be substituted into the efficiency function of the fuel cell system based on the estimated health state SOH value, and the efficiency curve of the fuel cell system can be updated to accurately reflect the fuel cell performance degradation. In combination with the external power demand and the updated efficiency curve, hard constraints are set on the output of the fuel cell system and the lithium battery, and the output power scheme of the fuel cell system and the lithium battery is determined using an optimization algorithm. This technical solution only explains that the health state SOH value of the fuel cell can be considered when determining the output power scheme of the fuel cell system and the lithium battery, but does not specifically explain how to determine the output power scheme.

[0004] Another related technique obtains fuel cell output voltage signals and cell polarization curves at various time intervals and inputs them into an established fuel cell aging model. Based on this input data, the model predicts the remaining life of the fuel cell. This technical solution only discloses how to predict the remaining life of the fuel cell (the fuel cell's state of health (SOH) value), but does not determine the fuel cell's operating parameters to accurately manage energy. Summary of the Invention

[0005] The present application provides a power determination method, device, electronic device and vehicle. The purpose of the present application is to at least solve the technical problems in the related art of low accuracy in determining the output power of a fuel cell and poor effect in managing the energy of the fuel cell.

[0006] In order to achieve the above objectives, the technical solutions adopted in this application are as follows:

[0007] According to the first aspect provided by the present application, a power determination method is provided, the method comprising: obtaining an operating cost parameter of a vehicle and a performance attenuation parameter of a fuel cell, the operating cost parameter being used to indicate the energy consumption cost of the vehicle during operation, and the performance attenuation parameter being used to indicate the attenuation degree of the fuel cell; based on the operating cost parameter, determining the relationship between the total cost consumed during vehicle operation and variable parameters, the variable parameters comprising: the net output power of the fuel cell, the rate of change of the net output power, and the output current of the fuel cell; based on the performance attenuation parameter, determining a value range of the variable parameter; and based on the relationship between the total cost and the variable parameter and the value range of the variable parameter, determining the target net output power of the fuel cell.

[0008] According to the above technical means, the present application can determine the relationship between the total cost consumed by the vehicle during operation and the variable parameters based on the vehicle's operating cost parameters. Since the variable parameters include: the net output power of the fuel cell, the rate of change of the net output power and the output current of the fuel cell, changes in these parameters will cause the total cost consumed by the vehicle during operation to change. Furthermore, when the performance attenuation parameter of the fuel cell changes, it will cause the variable parameters to change. Therefore, it is necessary to determine the value range of the variable parameter based on the performance attenuation parameter of the fuel cell, and then, based on the value range of the variable parameter, according to the relationship between the total cost and the variable parameter, the target net output power of the fuel cell can be determined. Based on this solution, even when the performance attenuation parameter of the fuel cell changes and causes the variable parameter to change, the change of the variable parameter can be constrained by the value range of the variable parameter, and by using the relationship between the total cost and the variable parameter, the net output power of the fuel cell can be accurately determined, thereby improving the accuracy of determining the output power of the fuel cell and improving the effect of managing the energy of the fuel cell.

[0009] In one possible embodiment, the above-mentioned determination of the target net output power of the fuel cell based on the relationship between the total cost and the variable parameters and the value range of the variable parameters includes: based on the relationship between the total cost and the variable parameters, determining the net output power in the variable parameters corresponding to the minimum total cost as the target net output power.

[0010] According to the above technical means, the present application can determine the target net output power based on the relationship between the total cost and the variable parameters, specifically the net output power of the variable parameters corresponding to the minimum total cost. In this way, the optimal fuel cell output power can be determined by determining the net output power of the variable parameters corresponding to the minimum total cost.

[0011] In one possible embodiment, the operating cost parameters include the attenuation cost of the fuel cell and other costs, and the other costs include at least one of the following: the fuel consumption cost of the fuel cell, the electricity consumption cost, and the attenuation cost of the power battery; the above-mentioned acquisition of the vehicle's operating cost parameters includes: based on the vehicle's required power, determining the requested power allocated to the fuel cell and the requested power allocated to other power equipment, and the other power equipment includes at least a power battery; based on the requested power allocated to the fuel cell and the requested power allocated to other power equipment, determining the operating cost parameters.

[0012] Based on the above technical means, the present application can determine the requested power allocated to the fuel cell and the requested power allocated to other power devices based on the vehicle's required power. In this way, if a vehicle includes multiple power devices, the requested power of each power device can be reasonably allocated. Consequently, once the requested power of each power device is determined, the corresponding operating cost parameters can be accurately determined based on the requested power of each power device.

[0013] In a possible embodiment, the above-mentioned determination of the value range of the variable parameter based on the performance attenuation parameter includes: determining the value range of the variable parameter based on the performance attenuation parameter and preset constraints, and the preset constraints include: a preset power upper limit and a preset power lower limit corresponding to the net output power of the fuel cell, a preset change rate upper limit and a preset change rate lower limit corresponding to the net output power, and a preset maximum output current corresponding to the output current of the fuel cell.

[0014] Based on the above technical means, the present application can adjust predetermined constraints based on performance degradation parameters to determine the value range of the variable parameters corresponding to the fuel cell under the current performance degradation parameters. This can accurately determine the upper and lower power limits corresponding to the net output power of the fuel cell after degradation, the upper and lower change rates corresponding to the net output power, and the maximum output current corresponding to the output current of the fuel cell. Based on the performance degradation parameters, the value range of the variable parameters corresponding to different situations can be accurately determined, improving the accuracy of the value range of the variable parameters.

[0015] In a possible embodiment, the above-mentioned determination of the value range of the variable parameter based on the performance attenuation parameter and the preset constraint conditions includes: determining the product of the performance attenuation parameter and the preset power upper limit as the target power upper limit, and determining the product of the performance attenuation parameter and the preset power lower limit as the target power lower limit; determining the product of the performance attenuation parameter and the preset change rate upper limit as the target change rate upper limit, and determining the product of the performance attenuation parameter and the preset change rate lower limit as the target change rate lower limit; determining the product of the performance attenuation parameter and the preset maximum output current as the target maximum output current, and obtaining the value range of the variable parameter.

[0016] According to the above technical means, the present application can specifically determine the adjusted target power upper limit, target power lower limit, target change rate upper limit, target change rate lower limit, and target maximum output current based on the product of the performance degradation parameter and the preset power upper limit, preset power lower limit, preset change rate upper limit, preset change rate lower limit, and preset maximum output current, thereby obtaining the value range of the adjusted variable parameters. Therefore, based on the performance degradation parameter, the value range of the variable parameters corresponding to different situations can be accurately determined, thereby improving the accuracy of the value range of the variable parameters.

[0017] In one possible embodiment, the above-mentioned determination of the target net output power of the fuel cell based on the relationship between the total cost and the variable parameters and the value range of the variable parameters includes: determining the relationship between the quality of fuel consumed during vehicle operation and the variable parameters based on the relationship between the total cost and the variable parameters and the fuel price; determining the target net output power of the fuel cell based on the relationship between the fuel quality and the variable parameters and the value range of the variable parameters.

[0018] Based on the above technical means, the present application can further determine the relationship between the fuel quality consumed during vehicle operation and the variable parameter based on the relationship between the total cost and the variable parameter and the fuel price. Thus, based on the relationship between the fuel quality and the variable parameter and the range of the variable parameter, the target net output power of the fuel cell can be determined. This can further accurately determine the net output power of the fuel cell based on the relationship between the fuel quality and the variable parameter, improving the accuracy of determining the fuel cell's output power and enhancing the effectiveness of fuel cell energy management.

[0019] In a possible embodiment, the above method also includes: determining at least one set of operating data corresponding to each of multiple preset power values ​​from multiple sets of operating data of the fuel cell, each set of operating data including: the net output power of the fuel cell, the stack current and the stack voltage; for any one of the multiple preset power values, based on the coordinate points of at least one set of operating data corresponding to any preset power value in the preset coordinate system, determining the center coordinate point corresponding to any preset power value in the preset coordinate system; connecting the center coordinate points corresponding to each of the multiple preset power values ​​in the preset coordinate system in sequence to obtain a target performance curve, so as to represent the current performance information of the fuel cell through the target performance curve; determining the performance attenuation parameter of the fuel cell based on the current performance information, the first performance information and the second performance information, the first performance information being the performance information when the fuel cell is not attenuated, and the second performance information being the performance information when the attenuation degree of the fuel cell is the preset attenuation degree.

[0020] According to the above technical means, the present application can determine at least one set of operating data corresponding to each preset power value from multiple sets of operating data based on a plurality of preset power values. Then, based on the coordinate points of at least one set of operating data corresponding to each preset power value in the preset coordinate system, determine the center coordinate point corresponding to each preset power value in the preset coordinate system. In this way, based on the connection line of the center coordinate points corresponding to each preset power value in the preset coordinate system among the multiple preset power values, the target performance curve corresponding to the fuel cell can be determined. Since the fuel cell has different performance information when it produces different degrees of attenuation, and the performance information of the fuel cell can be accurately determined based on the operating data of the fuel cell. Therefore, based on the current performance information of the fuel cell represented by the target performance curve, combined with the first performance information when the fuel cell is not attenuated, and the second performance information when the attenuation degree of the fuel cell is the preset attenuation degree, the current attenuation degree of the fuel cell can be determined to accurately evaluate the performance attenuation parameters of the fuel cell.

[0021] In one possible embodiment, the above-mentioned determination of the performance attenuation parameters of the fuel cell based on the current performance information, the first performance information, and the second performance information includes: determining the area of ​​a first closed area formed by the target performance curve and the first performance curve, and the area of ​​a second closed area formed by the first performance curve and the second performance curve, the first performance curve representing the first performance information, and the second performance curve representing the second performance information; determining the performance attenuation parameters of the fuel cell based on the area of ​​the first closed area and the area of ​​the second closed area.

[0022] According to the above-mentioned technical means, the present application can determine the corresponding performance curve of the fuel cell when it produces different degrees of attenuation, specifically based on the area of ​​the closed area formed between the corresponding performance curves, to intuitively and accurately determine the performance attenuation parameters of the fuel cell, thereby improving the accuracy of determining the performance attenuation parameters of the fuel cell through specific coordinate information.

[0023] In a possible embodiment, the above-mentioned determination of at least one group of operating data corresponding to each preset power value in multiple preset power values ​​from multiple groups of operating data of the fuel cell includes: determining, for any one of the multiple preset power values, a power interval corresponding to any preset power value; and determining at least one group of operating data in the multiple groups of operating data whose net output power is in the power interval corresponding to any preset power value as at least one group of operating data corresponding to any preset power value.

[0024] Based on the above technical means, the present application can first determine the power range corresponding to each preset power value. Then, based on the power range within which the net output power included in each set of operating data falls, at least one set of operating data corresponding to each preset power value can be determined. In this way, the at least one set of operating data corresponding to each preset power value can be accurately determined, thereby improving the accuracy of the subsequent determination of the target performance curve corresponding to the fuel cell.

[0025] According to the second aspect provided by the present application, a power determination device is provided, which includes: an acquisition module and a processing module; the acquisition module is used to obtain the vehicle's operating cost parameters and the fuel cell's performance attenuation parameters, the operating cost parameters are used to indicate the energy consumption cost of the vehicle during operation, and the performance attenuation parameters are used to indicate the attenuation degree of the fuel cell; the processing module is used to determine the relationship between the total cost consumed during vehicle operation and the variable parameters based on the operating cost parameters, the variable parameters including: the net output power of the fuel cell, the rate of change of the net output power and the output current of the fuel cell; the processing module is also used to determine the value range of the variable parameters based on the performance attenuation parameters; the processing module is also used to determine the target net output power of the fuel cell based on the relationship between the total cost and the variable parameters and the value range of the variable parameters.

[0026] In a possible implementation manner, the processing module is specifically configured to determine, based on a relationship between the total cost and the variable parameters, a net output power in the variable parameters corresponding to the minimum total cost as the target net output power.

[0027] In one possible embodiment, the operating cost parameters include the attenuation cost and other costs of the fuel cell, and the other costs include at least one of the following: the fuel consumption cost of the fuel cell, the electricity consumption cost, and the attenuation cost of the power battery; the processing module is specifically used to determine the requested power allocated to the fuel cell and the requested power allocated to other power equipment based on the vehicle's required power, and the other power equipment includes at least a power battery; the processing module is specifically used to determine the operating cost parameters based on the requested power allocated to the fuel cell and the requested power allocated to other power equipment.

[0028] In one possible embodiment, the processing module is specifically used to determine the value range of the variable parameter based on the performance attenuation parameter and preset constraints, and the preset constraints include: a preset power upper limit and a preset power lower limit corresponding to the net output power of the fuel cell, a preset change rate upper limit and a preset change rate lower limit corresponding to the net output power, and a preset maximum output current corresponding to the output current of the fuel cell.

[0029] In one possible embodiment, the processing module is specifically used to determine the product of the performance attenuation parameter and the preset power upper limit as the target power upper limit, and to determine the product of the performance attenuation parameter and the preset power lower limit as the target power lower limit; the processing module is specifically used to determine the product of the performance attenuation parameter and the preset change rate upper limit as the target change rate upper limit, and to determine the product of the performance attenuation parameter and the preset change rate lower limit as the target change rate lower limit; the processing module is specifically used to determine the product of the performance attenuation parameter and the preset maximum output current as the target maximum output current, thereby obtaining the value range of the variable parameter.

[0030] In one possible embodiment, the processing module is specifically used to determine the relationship between the quality of fuel consumed during vehicle operation and the variable parameters based on the relationship between the total cost and the variable parameters and the fuel price; the processing module is specifically used to determine the target net output power of the fuel cell based on the relationship between the fuel quality and the variable parameters and the value range of the variable parameters.

[0031] In one possible embodiment, the processing module is also used to determine at least one set of operating data corresponding to each of multiple preset power values ​​from multiple sets of operating data of the fuel cell, and each set of operating data includes: the net output power of the fuel cell, the stack current and the stack voltage; the processing module is also used to determine, for any one of the multiple preset power values, the center coordinate point corresponding to any preset power value in the preset coordinate system based on the coordinate point of at least one set of operating data corresponding to any preset power value in the preset coordinate system; the processing module is also used to connect the center coordinate points corresponding to each of the multiple preset power values ​​in the preset coordinate system in sequence to obtain a target performance curve, so as to represent the current performance information of the fuel cell through the target performance curve; the processing module is also used to determine the performance attenuation parameter of the fuel cell based on the current performance information, the first performance information and the second performance information, the first performance information being the performance information when the fuel cell is not attenuated, and the second performance information being the performance information when the attenuation degree of the fuel cell is the preset attenuation degree.

[0032] In one possible embodiment, the processing module is specifically used to determine the area of ​​a first closed area formed by the target performance curve and the first performance curve, and the area of ​​a second closed area formed by the first performance curve and the second performance curve, the first performance curve represents first performance information, and the second performance curve represents second performance information; the processing module is specifically used to determine the performance attenuation parameter of the fuel cell based on the area of ​​the first closed area and the area of ​​the second closed area.

[0033] In one possible embodiment, the processing module is specifically used to determine, for any one of a plurality of preset power values, a power interval corresponding to any preset power value; the processing module is specifically used to determine, among a plurality of sets of operating data, at least one set of operating data whose net output power is within the power interval corresponding to any preset power value as at least one set of operating data corresponding to any preset power value.

[0034] According to the third aspect provided by the present application, an electronic device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute instructions to implement the method of the above-mentioned first aspect and any possible implementation method thereof.

[0035] According to the fourth aspect provided by the present application, a computer-readable storage medium is provided. When the instructions in the computer-readable storage medium are executed by the processor of an electronic device, the electronic device executes the method of the above-mentioned first aspect and any possible implementation method thereof.

[0036] According to the fifth aspect provided by the present application, a computer program product is provided, which includes computer instructions. When the computer instructions are executed on an electronic device, the electronic device executes the method of the above-mentioned first aspect and any possible implementation method thereof.

[0037] According to a sixth aspect provided by the present application, a vehicle is provided, the vehicle including the power determination device as in the second aspect, and the vehicle is used to implement the method of the above-mentioned first aspect and any possible implementation manner thereof.

[0038] Therefore, the above technical features of this application have the following beneficial effects:

[0039] (1) The present application can determine the relationship between the total cost consumed by the vehicle during operation and the variable parameters based on the vehicle's operating cost parameters. Since the variable parameters include: the net output power of the fuel cell, the rate of change of the net output power and the output current of the fuel cell, changes in these parameters will cause the total cost consumed by the vehicle during operation to change. Furthermore, when the performance attenuation parameters of the fuel cell change, the variable parameters will also change. Therefore, it is necessary to determine the value range of the variable parameters based on the performance attenuation parameters of the fuel cell, and then, based on the value range of the variable parameters, the target net output power of the fuel cell can be determined according to the relationship between the total cost and the variable parameters. Based on this solution, even when the performance attenuation parameters of the fuel cell change and the variable parameters change, the change of the variable parameters can be constrained by the value range of the variable parameters, and by using the relationship between the total cost and the variable parameters, the net output power of the fuel cell can be accurately determined, thereby improving the accuracy of determining the output power of the fuel cell and improving the effect of managing the energy of the fuel cell.

[0040] (2) Based on the relationship between the total cost and the variable parameters, the present application can determine the net output power of the variable parameters corresponding to the minimum total cost as the target net output power. In this way, by determining the net output power of the variable parameters corresponding to the minimum total cost, the optimal fuel cell output power can be determined.

[0041] (3) The present application can determine the requested power allocated to the fuel cell and the requested power allocated to other power devices based on the vehicle's required power. Thus, if the vehicle includes multiple power devices, the requested power of each power device can be reasonably allocated. Thus, when the requested power of each power device is determined, the corresponding operating cost parameters can be accurately determined based on the requested power of each power device.

[0042] (4) The present application can adjust the pre-determined preset constraints based on the performance attenuation parameters, thereby determining the value range of the variable parameters corresponding to the fuel cell under the current performance attenuation parameters. This can accurately determine the upper and lower power limits corresponding to the net output power of the fuel cell after attenuation, the upper and lower change rates corresponding to the net output power, and the maximum output current corresponding to the output current of the fuel cell. Therefore, based on the performance attenuation parameters, the value range of the variable parameters corresponding to different situations can be accurately determined, thereby improving the accuracy of the value range of the variable parameters.

[0043] (5) The present application can specifically determine the adjusted target power upper limit, target power lower limit, target change rate upper limit, target change rate lower limit, and target maximum output current based on the product of the performance degradation parameter and the preset power upper limit, preset power lower limit, preset change rate upper limit, preset change rate lower limit, and preset maximum output current, thereby obtaining the value range of the adjusted variable parameter. Therefore, based on the performance degradation parameter, the value range of the variable parameter corresponding to different situations can be accurately determined, thereby improving the accuracy of the value range of the variable parameter.

[0044] (6) The present application can further determine the relationship between the fuel quality consumed during vehicle operation and the variable parameter based on the relationship between the total cost and the variable parameter and the fuel price. Thus, based on the relationship between the fuel quality and the variable parameter and the value range of the variable parameter, the target net output power of the fuel cell can be determined. In this way, based on the relationship between the fuel quality and the variable parameter, the net output power of the fuel cell can be accurately determined, thereby improving the accuracy of determining the output power of the fuel cell and enhancing the effectiveness of managing the energy of the fuel cell.

[0045] (7) The present application can determine at least one set of operating data corresponding to each preset power value from multiple sets of operating data based on a plurality of preset power values. Then, based on the coordinate points of at least one set of operating data corresponding to each preset power value in the preset coordinate system, determine the center coordinate point corresponding to each preset power value in the preset coordinate system. In this way, based on the connection line of the center coordinate points corresponding to each preset power value in the preset coordinate system among the multiple preset power values, the target performance curve corresponding to the fuel cell can be determined. Since the fuel cell has different performance information when it produces different degrees of attenuation, and the performance information of the fuel cell can be accurately determined based on the operating data of the fuel cell. Therefore, based on the current performance information of the fuel cell represented by the target performance curve, combined with the first performance information when the fuel cell is not attenuated, and the second performance information when the attenuation degree of the fuel cell is the preset attenuation degree, the current attenuation degree of the fuel cell can be determined to accurately evaluate the performance attenuation parameters of the fuel cell.

[0046] (8) The present application can determine the performance attenuation parameters of the fuel cell intuitively and accurately based on the area of ​​the closed region formed between the corresponding performance curves when the fuel cell produces different degrees of attenuation, thereby improving the accuracy of determining the performance attenuation parameters of the fuel cell through specific coordinate information.

[0047] (9) The present application can first determine the power range corresponding to each preset power value, and then, based on the power range within which the net output power included in each set of operating data in the multiple sets of operating data lies, determine at least one set of operating data corresponding to each preset power value. In this way, the at least one set of operating data corresponding to each preset power value can be accurately determined, thereby improving the accuracy of the subsequent determination of the target performance curve corresponding to the fuel cell.

[0048] It should be noted that the technical effects brought about by any implementation method in the second to sixth aspects can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here.

[0049] 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

[0050] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0051] Figure 1 is a current-voltage characteristic diagram according to an exemplary embodiment;

[0052] Figure 2 is an IV curve diagram corresponding to a fuel cell according to an exemplary embodiment;

[0053] Figure 3 is another current-voltage characteristic diagram according to an exemplary embodiment;

[0054] Figure 4 is a structural diagram of a power determination system according to an exemplary embodiment;

[0055] Figure 5 is a flow chart showing a method for determining power according to an exemplary embodiment;

[0056] Figure 6 is a flow chart showing another method for determining power according to an exemplary embodiment;

[0057] Figure 7is a flow chart showing another method for determining power according to an exemplary embodiment;

[0058] Figure 8 is a time series data diagram after filtering according to an exemplary embodiment;

[0059] Figure 9 is a schematic diagram of a coordinate point cluster according to an exemplary embodiment;

[0060] Figure 10 is a schematic diagram of a target performance curve corresponding to a fuel cell according to an exemplary embodiment;

[0061] Figure 11 is a schematic diagram of a target performance curve corresponding to another fuel cell according to an exemplary embodiment;

[0062] Figure 12 is a flow chart showing another method for determining power according to an exemplary embodiment;

[0063] Figure 13 is a block diagram showing a power determination device according to an exemplary embodiment;

[0064] Figure 14 It is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0065] In order to enable ordinary people in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0066] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0067] With the rapid development of new energy vehicles, fuel cells have the advantages of zero emissions, high efficiency and fast refueling (such as hydrogen) and are an important direction for the development of new energy vehicles. The actual output voltage of the fuel cell decreases as the output current increases, showing the following Figure 1The current-voltage characteristic diagram shown is the IV curve (or polarization curve), and the IV curve is usually used to describe the output performance of the fuel cell. However, as the working time of the fuel cell increases, its IV curve is not static. The fuel cell will experience various operating conditions during operation, resulting in irreversible attenuation of the catalyst, catalyst carbon support, diffusion layer, proton exchange membrane, etc., resulting in different degrees of reduction in the corresponding voltage at each current point. The IV curve is the most direct representation of the output performance of the fuel cell, so the decline of the IV curve can intuitively show the degree of performance attenuation of the fuel cell (that is, the health status of the fuel cell).

[0068] A fuel cell, also known as a fuel cell engine, is the primary power source in fuel cell vehicles (FCVs), playing a crucial role in converting the chemical energy in fuel (e.g., hydrogen) into electrical energy. The fuel cell engine primarily consists of multiple subsystems, including the fuel cell stack, air supply subsystem, water and heat management subsystem, hydrogen supply subsystem, and a fuel cell-specific DC-to-DC converter (DCDC). Components include: a hydrogen storage tank, a pressure reducing valve, a proportional valve, an ejector, a hydrogen-water separator, a purge valve, an air pressure sensor, a humidifier, an intercooler, an air compressor, an intake air mass flow sensor, an air filter, a bypass throttle, a bypass mass flow sensor, and a backpressure throttle. The fuel cell-specific DCDC is also connected to the vehicle control unit (VCU), a DC-to-AC converter (DCAC), the power battery, a one-way DCCDC, and the vehicle's heating network PTC. The DCAC is also connected to the drive motor.

[0069] During operation, the fuel cell adjusts the DC-DC input current (equivalent to the fuel cell stack current) to control the fuel cell's operating power. The air system, hydrothermal management subsystem, and hydrogen supply subsystem determine and maintain corresponding operating conditions such as flow, pressure, and water temperature based on the fuel cell's operating power. During actual vehicle operation, the VCU determines and sends a power request (i.e., the requested power corresponding to the fuel cell) to the fuel cell controller (FCCU). The FCCU adjusts the DC-DC input current to achieve precise control of the fuel cell's net output power. This process is called closed-loop engine power control.

[0070] For example, as shown in Formula 1, the actual output voltage of the fuel cell can be expressed as the voltage upper limit provided by thermodynamics (i.e., the reversible voltage) minus various voltage losses:

[0071] V out =E r -ηact -η ohm -η conc Formula 1

[0072] Among them, V out is the actual output voltage of the fuel cell, E r represents the voltage upper limit provided by thermodynamics, i.e., the reversible voltage, η act is the activation loss, η ohm is the ohmic loss, η conc is the mass transfer loss. Activation loss η act As the reaction rate increases, according to Ohm's law, the ohmic loss η ohm As the output current increases, it increases approximately linearly, while the mass transfer loss η conc It is very significant under high current. Therefore, the actual output voltage of the fuel cell decreases as the output current increases, showing as follows Figure 1 The current-voltage characteristics diagram shown.

[0073] However, as the fuel cell's operating time increases, its IV curve is not static. During operation, the fuel cell may experience a series of operating conditions such as dynamic load changes, material starvation, dry-wet alternation, membrane dry-water flooding, etc., which may cause irreversible attenuation of the catalyst, catalyst carbon carrier, diffusion layer, proton exchange membrane, etc., resulting in different degrees of voltage drop at each current point, which is manifested as a drop in the IV curve. Figure 2 As shown in the figure, the IV curves of the fuel cell after different operating times (i.e., 0h, 100h, 200h, 280h, and 370h) show the relationship between the cell voltage and current at different operating times. Since the IV curve is the most direct indicator of the output performance of the fuel cell, the decline of the IV curve can intuitively indicate the degree of fuel cell performance degradation, that is, the health status of the fuel cell.

[0074] However, during vehicle powertrain operation, the fuel cell's operating current depends on its output power, which in turn depends on the vehicle's required power and the energy management strategy. Therefore, it's impossible to directly control the fuel cell's operating current on the vehicle to obtain the steady-state voltage at each current point within the entire operating range, thereby generating the fuel cell's corresponding IV curve under different conditions. Even if the FCCU were to implement a function that periodically scans at set current points, there would still be the following drawbacks: the fuel cell's output power is not controlled by the vehicle's VCU, and during the IV curve scan, the fuel cell's output power has nowhere to be absorbed, potentially causing overcharging of the power battery; and the user can sense that the fuel cell is scanning the IV curve through their senses, which is detrimental to the user's seamless experience.

[0075] Furthermore, during actual vehicle operation, the health of the fuel cell (i.e., performance degradation parameters) is a continuously changing process. Current research on fuel cell vehicle energy management ignores these real-time health changes, assuming the fuel cell's IV polarization curve remains unchanged. Fuel cell lifespan degradation, an indicator for evaluating energy management, is not reflected in the IV polarization curve, and is simply considered a cost factor. However, during actual vehicle operation, the fuel cell's IV polarization curve will decline. If the energy management strategy continues to be based on the original IV polarization curve, the power allocated to the fuel cell by the VCU will remain unchanged. However, due to the decline in the IV polarization curve, the output power will increase, further exacerbating the load variation and causing the fuel cell's lifespan to decline rapidly.

[0076] And, as Figure 3 As shown in the figure, as the fuel cell operating time increases, the IV polarization curve decreases. When the VCU allocates a higher demand power to the fuel cell, the current of the IV polarization curve after the decrease will reach the mass transfer loss zone faster than the initial state. In the actual use of the fuel cell, it is necessary to avoid working in this area. This is because in the mass transfer loss zone, as the current increases, the concentration of the reactants on the electrode surface decreases, resulting in a slow reaction rate. The voltage of the fuel cell will drop rapidly, and energy loss will increase. The overall energy conversion efficiency is low, the performance is unstable, and the power output fluctuates. Under high current conditions, the thermal management and heat dissipation requirements increase, which will affect the economy, reliability, and service life of the fuel cell.

[0077] In the embodiment of the present application, during the vehicle driving process, the fuel cell engine system power, output current and output voltage historical data are calculated by the calculation module to fit the average IV polarization curve of the fuel cell within a certain time window, thereby obtaining a real-time updated health status quantitative index SOH fc (i.e. performance attenuation parameter). Based on SOH fc Dynamically adjust the upper and lower limits of fuel cell output power, the output power change rate limit value, and the maximum output current limit value to avoid forced rapid load changes after performance degradation, and delay further life degradation caused by the obstruction of material transfer and slow electrochemical reactions due to the degradation of material physical properties; avoid the fuel cell from operating in the high current mass transfer loss area, and keep the fuel cell operating in the high-efficiency current range at all times.

[0078] The power determination method provided in the embodiment of the present application can be applied to a power determination system. Figure 4 FIG. 1 shows a schematic diagram of the structure of a power determination system. Figure 4 As shown, the power determination system 40 includes a controller 41 and a fuel cell 42. The controller 41 may be a fuel cell controller or a vehicle controller.

[0079] The controller 41 can obtain the operating cost parameter of the vehicle and the performance degradation parameter of the fuel cell 42 . The operating cost parameter is used to indicate the energy consumption cost when the vehicle is running, and the performance degradation parameter is used to indicate the degradation degree of the fuel cell 42 .

[0080] The controller 41 can also determine the relationship between the total cost consumed during vehicle operation and variable parameters based on the operating cost parameters, including: the net output power of the fuel cell 42, the rate of change of the net output power, and the output current of the fuel cell 42.

[0081] The controller 41 may also determine a value range of the variable parameter based on the performance degradation parameter.

[0082] The controller 41 may also determine the target net output power of the fuel cell 42 based on the relationship between the total cost and the variable parameter and the value range of the variable parameter.

[0083] In some embodiments, the controller 41 may specifically determine the net output power among the variable parameters corresponding to the minimum total cost as the target net output power based on the relationship between the total cost and the variable parameters.

[0084] In some embodiments, the operating cost parameters include the attenuation cost of the fuel cell and other costs, and the other costs include at least one of the following: the fuel consumption cost of the fuel cell, the electricity consumption cost, and the attenuation cost of the power battery; the controller 41 can specifically determine the requested power allocated to the fuel cell 42 and the requested power allocated to other power equipment based on the vehicle's required power, and the other power equipment includes at least a power battery; the operating cost parameters are determined based on the requested power allocated to the fuel cell 42 and the requested power allocated to other power equipment.

[0085] In some embodiments, the controller 41 can specifically determine the value range of the variable parameter based on the performance attenuation parameter and preset constraints. The preset constraints include: a preset power upper limit and a preset power lower limit corresponding to the net output power of the fuel cell 42, a preset change rate upper limit and a preset change rate lower limit corresponding to the net output power, and a preset maximum output current corresponding to the output current of the fuel cell 42.

[0086] In some embodiments, the controller 41 can specifically determine the product of the performance attenuation parameter and the preset power upper limit as the target power upper limit, and determine the product of the performance attenuation parameter and the preset power lower limit as the target power lower limit; determine the product of the performance attenuation parameter and the preset change rate upper limit as the target change rate upper limit, and determine the product of the performance attenuation parameter and the preset change rate lower limit as the target change rate lower limit; determine the product of the performance attenuation parameter and the preset maximum output current as the target maximum output current, and obtain the value range of the variable parameter.

[0087] In some embodiments, the controller 41 can specifically determine the relationship between the fuel quality consumed during vehicle operation and the variable parameters based on the relationship between the total cost and the variable parameters and the fuel price; and determine the target net output power of the fuel cell 42 based on the relationship between the fuel quality and the variable parameters and the value range of the variable parameters.

[0088] In some embodiments, the controller 41 can also determine at least one set of operating data corresponding to each of multiple preset power values ​​from multiple sets of operating data of the fuel cell 42, each set of operating data including: the net output power, stack current and stack voltage of the fuel cell 42; for any one of the multiple preset power values, based on the coordinate point of at least one set of operating data corresponding to any preset power value in the preset coordinate system, determine the center coordinate point corresponding to any preset power value in the preset coordinate system; connect the center coordinate points corresponding to each of the multiple preset power values ​​in the preset coordinate system in sequence to obtain a target performance curve, so as to represent the current performance information of the fuel cell 42 through the target performance curve; based on the current performance information, the first performance information and the second performance information, determine the performance attenuation parameter of the fuel cell 42, the first performance information being the performance information when the fuel cell 42 is not attenuated, and the second performance information being the performance information when the attenuation degree of the fuel cell 42 is the preset attenuation degree.

[0089] In some embodiments, the controller 41 can specifically determine the area of ​​a first closed area formed by the target performance curve and the first performance curve, and the area of ​​a second closed area formed by the first performance curve and the second performance curve, the first performance curve represents first performance information, and the second performance curve represents second performance information; based on the area of ​​the first closed area and the area of ​​the second closed area, the performance attenuation parameters of the fuel cell 42 are determined.

[0090] In some embodiments, the controller 41 can specifically determine the power interval corresponding to any preset power value among multiple preset power values; and determine at least one group of operating data in multiple groups of operating data whose net output power is in the power interval corresponding to any preset power value as at least one group of operating data corresponding to any preset power value.

[0091] It should be noted that the implementation of the embodiments of the present application requires the preparation of the following hardware and software conditions: a fuel cell engine with complete control capabilities, with system control implemented by the fuel cell engine system controller FCCU; a VCU vehicle controller that controls energy management; a vehicle-side data transmission repeater or relay device with database data transmission and communication capabilities; a data operation service module with data reception, transmission, storage and calculation capabilities; configuration of the CAN communication protocol between DCDC and FCCU to ensure that DCDC can receive the DCDC input end current request value signal sent by FCCU, and at the same time, FCCU can receive the DCDC output end current and voltage actual value signals sent by DCDC; completion of the configuration of the data transmission communication protocol of DCDC, FCCU, VCU, data transmission repeater or relay device, data operation service module, and terminal equipment to ensure normal data flow transmission.

[0092] For ease of understanding, the power determination method provided in this application is described in detail below with reference to the accompanying drawings.

[0093] Figure 5 FIG. 1 is a flow chart showing a method for determining power according to an exemplary embodiment. Figure 5 As shown, the method includes the following S501-S504:

[0094] S501: Obtain vehicle operation cost parameters and fuel cell performance degradation parameters.

[0095] The operating cost parameter is used to indicate the energy consumption cost of the vehicle during operation, and the performance attenuation parameter is used to indicate the attenuation degree of the fuel cell.

[0096] Optionally, the vehicle's operating cost parameters and the fuel cell's performance degradation parameters can be obtained from the fuel cell controller or the vehicle controller.

[0097] Specifically, the fuel cell performance degradation parameter can be used to update the fuel cell health state value SOH fc (i.e. performance attenuation parameter), then the health status value SOH fc The data is uploaded to the vehicle controller along the data chain. After receiving the various data uploaded by the fuel cell and power battery, the vehicle controller substitutes them into the fuel cell vehicle energy management model.

[0098] In some embodiments, the operating cost parameter includes the attenuation cost of the fuel cell and other costs, and the other costs include at least one of the following: fuel consumption cost of the fuel cell, electricity consumption cost, and attenuation cost of the power battery.

[0099] In a power determination method provided in an embodiment of the present application, the "obtaining a vehicle operating cost parameter" may specifically include: determining a requested power allocated to the fuel cell and a requested power allocated to other power devices based on the vehicle's required power, and determining the operating cost parameter based on the requested power allocated to the fuel cell and the requested power allocated to the other power devices. The other power devices include at least a power battery.

[0100] It should be noted that the requested power of the fuel cell can be understood as the net output power of the fuel cell, and the requested power of other power devices can be understood as the net output power of other power devices.

[0101] Optionally, the vehicle controller can calculate the vehicle power requirement P according to the working conditions. veh , and then the vehicle required power P veh Distribute to fuel cells and other power equipment to determine the fuel cell's requested power P fc and the requested power P of other power equipment other .

[0102] It is understandable that the vehicle requires power P veh , fuel cell power requirement P fc and the requested power P of other power equipment other The relationship between is shown in Formula 2:

[0103] P veh =P fc +P other Formula 2

[0104] Specifically, when the vehicle includes a fuel cell and a power battery, the requested power P of other power equipment is other This is the power requested by the power battery. When the vehicle also includes other power equipment (such as an engine, etc.), the power requested by other power equipment P other In addition to the requested power of the power battery, it also includes the requested power of the engine.

[0105] In this way, when determining the requested power allocated to the fuel cell and the requested power allocated to other power equipment, based on the vehicle's operating parameters, the operating cost parameters of each vehicle component (such as the fuel consumption cost of the fuel cell, the electricity consumption cost, the attenuation cost of the power battery, etc.) can be obtained from the vehicle controller.

[0106] In an embodiment of the present application, the present application can determine the requested power allocated to the fuel cell and the requested power allocated to other power devices based on the vehicle's required power. In this way, if a vehicle includes multiple power devices, the requested power of each power device can be reasonably allocated. Thus, when the requested power of each power device is determined, the corresponding operating cost parameter can be accurately determined based on the requested power of each power device.

[0107] S502 : Based on the operating cost parameter, determine the relationship between the total cost consumed during vehicle operation and the variable parameter.

[0108] Among them, the variable parameters include: the net output power P of the fuel cell fc , the rate of change of net output power ΔP fc and the fuel cell output current I fc .

[0109] Optionally, since the operating cost parameter includes the attenuation cost of the fuel cell and other costs, and the other costs include at least one of the following: fuel consumption cost of the fuel cell, electricity consumption cost, and attenuation cost of the power battery, a cost function can be constructed based on the operating cost parameter to indicate the total cost J consumed by the vehicle during operation and the attenuation cost J of the fuel cell. fc and other costsJ other The relationship between ,the cost function is shown in Formula 3.

[0110] J=J fc +J other Formula 3

[0111] Furthermore, when other costs include fuel consumption cost of the fuel cell, electricity consumption cost, and attenuation cost of the power battery, the cost function can be shown as Formula 4 to indicate the total cost J consumed when the vehicle is running and the attenuation cost J of the fuel cell. fc , fuel cell fuel consumption costJ H2 , electricity consumption costJ ele , the attenuation cost of power batteriesJ bat The relationship between them.

[0112] J=J H2 +J ele +J fc +J bat Formula 4

[0113] S503: Determine a value range of the variable parameter based on the performance degradation parameter.

[0114] In some embodiments, "determining the value range of the variable parameter based on the performance attenuation parameter" can specifically include: determining the value range of the variable parameter based on the performance attenuation parameter and preset constraints, and the preset constraints include: a preset power upper limit and a preset power lower limit corresponding to the net output power of the fuel cell (i.e., the ideal output power of the fuel cell), a preset change rate upper limit and a preset change rate lower limit corresponding to the net output power (i.e., the maximum ideal power change rate limit value), and a preset maximum output current corresponding to the output current of the fuel cell (i.e., the maximum current in the ohmic loss zone).

[0115] The preset upper limit of the change rate and the preset lower limit of the change rate corresponding to the net output power are used to limit the change amount of the net output power of the fuel cell between two adjacent adjustments.

[0116] It should be noted that the preset constraints can be considered as the constraints corresponding to the optimal performance attenuation parameters of the fuel cell, that is, the constraints corresponding to the fuel cell without attenuation, that is, the health status value SOH of the fuel cell. fc The corresponding constraint condition when it is 100%.

[0117] Based on this, when the fuel cell's performance degradation parameter decreases (for example, to 90% or 80%, etc.), the corresponding constraints also need to be adjusted to more accurately determine the fuel cell's net output power. Therefore, based on the performance degradation parameter and the preset constraints, the value range of the variable parameter can be determined for the fuel cell at different performance degradation parameters.

[0118] In an embodiment of the present application, the present application can adjust predetermined preset constraints based on performance degradation parameters to determine the value range of the variable parameter corresponding to the fuel cell under the current performance degradation parameters. This can accurately determine the upper and lower power limits corresponding to the net output power of the fuel cell after degradation, the upper and lower change rate limits corresponding to the net output power, and the maximum output current corresponding to the output current of the fuel cell. Based on the performance degradation parameters, the value range of the variable parameter corresponding to different situations can be accurately determined, thereby improving the accuracy of the value range of the variable parameter.

[0119] In some embodiments, as Figure 6 As shown, in a power determination method provided in an embodiment of the present application, the above-mentioned "determining a value range of a variable parameter based on a performance degradation parameter and a preset constraint condition" may specifically include S601-S603:

[0120] S601: Determine a product of a performance degradation parameter and a preset upper power limit as a target upper power limit, and determine a product of a performance degradation parameter and a preset lower power limit as a target lower power limit.

[0121] S602: Determine the product of the performance degradation parameter and the preset upper limit of the change rate as the target upper limit of the change rate, and determine the product of the performance degradation parameter and the preset lower limit of the change rate as the target lower limit of the change rate.

[0122] S603: Determine the product of the performance degradation parameter and the preset maximum output current as the target maximum output current, and obtain a value range of the variable parameter.

[0123] Optionally, the preset constraint conditions include: a preset power upper limit P corresponding to the net output power of the fuel cell fc_max and the preset power lower limit P fc_min , the preset upper limit of the change rate ΔP corresponding to the net output power fc_max and preset lower limit of change rate -ΔP fc_max , the output current of the fuel cell corresponds to the preset maximum output current I fc_max .

[0124] For example, as shown in Formula 5, the value range of the variable parameter is determined based on the performance degradation parameter and the preset constraint condition. fc When the fuel cell's net output power P fc The corresponding target power upper limit, target power lower limit, and net output power change rate ΔP fc The corresponding target change rate upper limit and target change rate lower limit, the output current of the fuel cell I fc The corresponding upper limit of the target change rate.

[0125]

[0126] Among them, α, β, and γ are P fc_max , ΔP fc_max , I fc_max The corresponding adjustment factor.

[0127] In an embodiment of the present application, the present application can specifically determine the adjusted target power upper limit, target power lower limit, target change rate upper limit, target change rate lower limit, and target maximum output current based on the product of the performance degradation parameter and the preset power upper limit, preset power lower limit, preset change rate upper limit, preset change rate lower limit, and preset maximum output current, thereby obtaining the adjusted value ranges of the variable parameters. Therefore, based on the performance degradation parameter, the value ranges of the variable parameters corresponding to different situations can be accurately determined, thereby improving the accuracy of the value ranges of the variable parameters.

[0128] S504 : Determine the target net output power of the fuel cell based on the relationship between the total cost and the variable parameters and the value range of the variable parameters.

[0129] Optionally, based on the relationship between the total cost and the variable parameters and the value range of the variable parameters, an energy management strategy for the fuel cell can be formulated, with the optimization function (cost function) shown in Formula 3 (or Formula 4) used as the optimization target and the value range of the variable parameters shown in Formula 5 (adjusted constraints) used as the constraints of the cost function. The required power of the entire vehicle can be allocated to the fuel cell and other power equipment, thereby determining the net output power of the fuel cell and the net output power of other power equipment.

[0130] In some embodiments, in a power determination method provided by an embodiment of the present application, the above-mentioned step S504 may specifically include: based on the relationship between the total cost and the variable parameters, determining the net output power in the variable parameters corresponding to the minimum total cost as the target net output power.

[0131] It can be understood that when the optimization function (cost function) shown in Formula 3 (or Formula 4) is used as the optimization target and the value range of the variable parameter shown in Formula 5 (adjusted constraint condition) is used as the constraint condition of the cost function, it can be determined that when the total cost J consumed during vehicle operation takes the minimum value, the corresponding net output power P of the fuel cell is fc The value of is determined as the target net output power.

[0132] In an embodiment of the present application, based on the relationship between the total cost and the variable parameters, the net output power in the variable parameters corresponding to the minimum total cost can be determined as the target net output power. In this way, by determining the net output power in the variable parameters corresponding to the minimum total cost, the optimal fuel cell output power can be determined.

[0133] In an embodiment of the present application, the present application can determine the relationship between the total cost consumed during vehicle operation and the variable parameters based on the vehicle's operating cost parameters. Since the variable parameters include: the net output power of the fuel cell, the rate of change of the net output power, and the output current of the fuel cell, changes in these parameters will cause the total cost consumed during vehicle operation to change. Furthermore, when the performance degradation parameters of the fuel cell change, it will also cause the variable parameters to change. Therefore, it is necessary to determine the value range of the variable parameters based on the performance degradation parameters of the fuel cell, and then, based on the value range of the variable parameters, the target net output power of the fuel cell can be determined according to the relationship between the total cost and the variable parameters. Based on this solution, even if the performance degradation parameters of the fuel cell change, which causes the variable parameters to change, the change of the variable parameters can be constrained by the value range of the variable parameters. Moreover, by using the relationship between the total cost and the variable parameters, the net output power of the fuel cell can be accurately determined, thereby improving the accuracy of determining the output power of the fuel cell and improving the effectiveness of fuel cell energy management.

[0134] In some embodiments, as Figure 7 As shown, in a power determination method provided in an embodiment of the present application, the above step S504 may specifically include S701-S702:

[0135] S701 : Based on the relationship between the total cost and the variable parameter and the fuel price, determine the relationship between the fuel mass consumed during vehicle operation and the variable parameter.

[0136] Optionally, it can be based on variable parameters (or total cost) and fuel price price H2 The ratio between them determines the relationship between the fuel mass consumed by the vehicle during operation and the variable parameters.

[0137] Thus, based on the above formula 4 and combined with the fuel price, the relationship between the fuel mass consumed during vehicle operation and the variable parameter can be obtained as shown in formula 6.

[0138]

[0139] in, represents the fuel consumption of the fuel cell within the time t, Indicates the fuel consumption of the power battery within the time t, min m H2 Indicates minimum fuel consumption.

[0140] Specifically, the fuel consumption of the power battery is m bat , fuel cell attenuation costJ fc , the attenuation cost of power batteriesJ bat The specific and appropriate method is shown in Formula 7.

[0141]

[0142] Among them, LHV H2 is the calorific value of the fuel, A h The accumulated ampere-hour of the power battery, A h (20%) is the cumulative ampere-hour when the battery capacity decays to 20%, P bat is the net output power of the power battery, P fc is the net output power of the fuel cell, price H2 is the price of fuel, yuan / kg, price fc is the price of fuel cell, RMB / kw, price bat is the price of power battery, RMB / kWh.

[0143] S702 : Determine the target net output power of the fuel cell based on the relationship between the fuel quality and the variable parameter and the value range of the variable parameter.

[0144] Optionally, based on the relationship between fuel quality and variable parameters and the value range of the variable parameters, the optimization function (cost function) shown in Formula 6 (Formula 7) is used as the optimization target, and the value range of the variable parameters shown in Formula 5 (adjusted constraints) is used as the constraint of the cost function. The required power of the entire vehicle can be allocated to the fuel cell and other power equipment, thereby determining the net output power of the fuel cell and the net output power of other power equipment.

[0145] In an embodiment of the present application, the present application can further determine the relationship between the fuel quality consumed during vehicle operation and the variable parameter based on the relationship between the total cost and the variable parameter and the fuel price. Thus, based on the relationship between the fuel quality and the variable parameter and the range of values ​​of the variable parameter, the target net output power of the fuel cell can be determined. This can further accurately determine the net output power of the fuel cell based on the relationship between the fuel quality and the variable parameter, thereby improving the accuracy of determining the output power of the fuel cell and enhancing the effectiveness of fuel cell energy management.

[0146] In some embodiments, a power determination method provided in an embodiment of the present application may further include S801-S804:

[0147] S801 : Determine at least one set of operating data corresponding to each of a plurality of preset power values ​​from a plurality of sets of operating data of a fuel cell.

[0148] Among them, each set of operating data includes: the net output power of the fuel cell, the stack current and the stack voltage.

[0149] Specifically, when the vehicle is driving normally and the fuel cell is operating normally, the vehicle can transmit the fuel cell operating data to the cloud server in real time. After receiving the fuel cell operating data, the cloud server can calculate the performance curve of the fuel cell in a certain period of time, and estimate the current attenuation degree of the fuel cell based on the obtained performance curve, that is, the performance attenuation parameter (i.e., the health state value SOH). fc ).

[0150] Optionally, after the system is started, the cloud server can detect in real time whether a calculation enable signal (i.e., an instruction to determine the target performance parameters of the fuel cell) is received. If a calculation enable signal is received, multiple sets of operating data (i.e., net output power P) of the fuel cell in the target time period (e.g., [t0-b, t0]) are obtained. fc , stack current I in , stack voltage U in ).

[0151] In some embodiments, in a power determination method provided in an embodiment of the present application, the above-mentioned step S801 may specifically include: determining, for any one of a plurality of preset power values, a power interval corresponding to any preset power value; and determining at least one group of operating data in a plurality of groups of operating data whose net output power is in a power interval corresponding to any preset power value as at least one group of operating data corresponding to any preset power value.

[0152] In the embodiment of the present application, multiple preset power values ​​P=[p1, p2, p3, ..., p n ], and determine p from multiple sets of running data in turn j Corresponding to at least one set of operating data, j=1, 2, 3, ..., n.

[0153] Optionally, the net output power P included in each set of operating data can be fc The value of p j ±1%p j Net output power P within the range fc At least one set of corresponding operating data is recorded in time sequence, and the corresponding stack current I in , stack voltage U in , and obtain the time series data diagram of the parameters based on time changes. And according to the time series data diagram of the parameters based on time changes, the horizontal axis is the stack current I in , the left vertical axis is the stack voltage U in , the vertical axis on the right is the net output power P fc , we can get the coordinate point diagram. According to the coordinate point diagram, we can see that as the stack current increases, the stack voltage shows a nonlinear downward trend, and the net output power shows a nonlinear upward trend.

[0154] In an embodiment of the present application, the present application can first determine the power range corresponding to each preset power value. Then, based on the power range within which the net output power included in each set of operating data falls, at least one set of operating data corresponding to each preset power value can be determined. In this way, the at least one set of operating data corresponding to each preset power value can be accurately determined, thereby improving the accuracy of the subsequent determination of the target performance curve corresponding to the fuel cell.

[0155] S802. For any one of the plurality of preset power values, based on coordinate points of at least one set of operating data corresponding to the any one of the preset power values ​​in the preset coordinate system, determine a center coordinate point corresponding to the any one of the preset power values ​​in the preset coordinate system.

[0156] Optionally, a coordinate point cluster of at least one set of operating data corresponding to each preset power value can be determined in a preset coordinate system, thereby determining a central coordinate point c corresponding to each preset power value based on the coordinate point cluster of at least one set of operating data corresponding to each preset power value. j In this way, the center coordinate point corresponding to each of the multiple preset power values ​​can be determined respectively.

[0157] S803 , sequentially connecting the central coordinate points corresponding to each of the plurality of preset power values ​​in the preset coordinate system to obtain a target performance curve, so as to represent current performance information of the fuel cell through the target performance curve.

[0158] Optionally, the central coordinate point corresponding to each preset power value in the preset coordinate system may be fitted to obtain a target performance curve corresponding to the fuel cell in the time period [t0-b, t0].

[0159] Specifically, based on the horizontal coordinate (i.e., current value) of the center coordinate point corresponding to each preset power value in the preset coordinate system, the center coordinate points corresponding to each preset power value in the preset coordinate system can be connected in sequence in order from small to large values ​​of the horizontal coordinate to obtain the target performance curve corresponding to the fuel cell.

[0160] Furthermore, based on the net output power P fc , stack current I in , stack voltage U in The net output power P is calculated by combining the preset power values ​​P = [p1, p2, p3, p4, p5, p6]. fc , stack current I in , stack voltage U in Filter, the filtered values ​​are in p j ±1%p j The net output power within the interval is recorded, and the corresponding stack current and stack voltage are recorded in time sequence, such as Figure 8 As shown, the net output power P after screening is obtained fc , stack current I in , stack voltage U in Then based on Figure 8 The time series data diagram after screening is shown, with the horizontal axis representing the stack current I in , the left vertical axis is the stack voltage U in , the vertical axis on the right is the net output power P fc , we can get the filtered coordinate point map. According to the filtered coordinate point map, we can determine that as the stack current value increases, the stack voltage and net output power present multiple coordinate point clusters in the coordinate system.

[0161] For example, Figure 9 As shown, a schematic diagram of a coordinate point cluster is shown, which takes the 55kW equal power coordinate point cluster in the range of 540A-620A as an example. The 55kW equal power coordinate point cluster in the range of 540A-620A is focused and amplified, and then the geometric center (i.e., the center coordinate point) of the coordinate point cluster is solved, and the current value and voltage value corresponding to the geometric center of the coordinate point cluster are used as the average stack current and average stack voltage when the fuel cell operates at 55kW equal power. In this way, based on this method, the geometric center of the coordinate point cluster corresponding to each preset power value can be determined. Further, as Figure 10 As shown, the target performance curve corresponding to the fuel cell is obtained by performing nonlinear fitting on the geometric centers corresponding to different preset power values.

[0162] Further, if Figure 11 As shown in the target performance curve diagram corresponding to the fuel cell, the preset coordinate system includes the target performance curve, the first performance curve (i.e., BoL), and the second performance curve (i.e., EoL). The area of ​​the first closed area formed by the target performance curve and the first performance curve can be calculated. and the area S of the second closed region formed by the first performance curve and the second performance curve BoL～EoL The target performance parameter SOH of the fuel cell is calculated by the following formula 5 fc .

[0163] S804: Determine a performance degradation parameter of the fuel cell based on the current performance information, the first performance information, and the second performance information.

[0164] The first performance information is the performance information when the fuel cell is not attenuated, and the second performance information is the performance information when the attenuation degree of the fuel cell is a preset attenuation degree.

[0165] It should be noted that the fuel cell has not decayed, which can be understood as the fuel cell being a brand new battery with an attenuation degree of 0 (i.e., a battery just manufactured, the health status can be expressed as 100). The fuel cell's attenuation degree is the preset attenuation degree, which can be understood as the fuel cell having been used to the maximum extent and needs to be scrapped. The preset attenuation degree can be 50%, i.e., the performance of the fuel cell has decayed by 50% (i.e., the health status can be expressed as 50), or the preset attenuation degree can be 40%, i.e., the performance of the fuel cell has decayed by 40% (i.e., the health status can be expressed as 60).

[0166] In an embodiment of the present application, the present application can determine at least one set of operating data corresponding to each preset power value from multiple sets of operating data based on a plurality of preset power values. Then, based on the coordinate points of the at least one set of operating data corresponding to each preset power value in the preset coordinate system, determine the center coordinate point corresponding to each preset power value in the preset coordinate system. In this way, based on the connection line of the center coordinate points corresponding to each preset power value in the preset coordinate system in the multiple preset power values, the target performance curve corresponding to the fuel cell can be determined. Since the fuel cell has different performance information when it produces different degrees of attenuation, and the performance information of the fuel cell can be accurately determined based on the operating data of the fuel cell. Therefore, based on the current performance information of the fuel cell represented by the target performance curve, combined with the first performance information when the fuel cell is not attenuated, and the second performance information when the attenuation degree of the fuel cell is the preset attenuation degree, the current attenuation degree of the fuel cell can be determined to accurately evaluate the performance attenuation parameters of the fuel cell.

[0167] In some embodiments, in a power determination method provided in an embodiment of the present application, step S804 may specifically include S901-S902:

[0168] S901: Determine the area of ​​a first closed region formed by the target performance curve and the first performance curve, and the area of ​​a second closed region formed by the first performance curve and the second performance curve.

[0169] The first performance curve represents first performance information, and the second performance curve represents second performance information.

[0170] S902 : Determine a performance attenuation parameter of the fuel cell based on the area of ​​the first enclosed region and the area of ​​the second enclosed region.

[0171] Optionally, the current performance degradation parameter of the fuel cell may be determined based on the area of ​​the first enclosed region and the area of ​​the second enclosed region.

[0172] Optionally, the preset coordinate system also includes a performance curve corresponding to when the fuel cell's performance degradation parameter is the highest (which may be referred to as an initial BoL curve), and a performance curve corresponding to when the fuel cell's performance degradation parameter is the lowest (i.e., a second preset parameter) (which may be referred to as an end-of-life curve).

[0173] It should be noted that when the fuel cell performance parameter is the highest, it can be understood that the fuel cell has not been used since it was produced (i.e., the fuel cell's operating time is 0 hours); when the fuel cell performance parameter is the lowest, it can be understood that the fuel cell's performance has degraded to a certain percentage (e.g., 60%) after it was produced and not used. For example, when the fuel cell performance parameter is the highest, the corresponding first preset parameter is 100%, and when the fuel cell performance parameter is the lowest, the corresponding second preset parameter is 60%.

[0174] In this way, the area of ​​the first closed region formed by the target performance curve and the first performance curve can be calculated and the area S of the second closed region formed by the first performance curve and the second performance curve BoL～EoL The target performance parameter SOH of the fuel cell is calculated by formula 8 fc .

[0175]

[0176] In an embodiment of the present application, the present application can determine the corresponding performance curves of the fuel cell when it produces different degrees of attenuation, specifically based on the area of ​​the closed area formed between the corresponding performance curves, to intuitively and accurately determine the performance attenuation parameters of the fuel cell, thereby improving the accuracy of determining the performance attenuation parameters of the fuel cell through specific coordinate information.

[0177] For example, Figure 12 As shown, after determining the performance attenuation parameters of the fuel cell, the value range of the net output power of the fuel cell (i.e., the upper and lower power limits), the value range of the preset change rate corresponding to the net output power (i.e., the upper and lower limits of the change rate), and the output current limit value of the fuel cell (i.e., the maximum output current) can be adjusted based on the performance attenuation parameters and preset constraints. Further, based on the adjusted constraints, the established cost function is optimized so that the fuel cell can reasonably respond to the required power of the vehicle according to its own health status, and the required power of the vehicle is allocated to the fuel cell and other energy sources (power equipment). Specifically, the vehicle controller calculates the required power P of the vehicle according to the working conditions. veh The designed cost function is used as the optimization target, and the range of the net output power of the fuel cell, the range of the preset change rate corresponding to the net output power, and the limit value of the output current of the fuel cell are used as constraints. The energy management strategy is used to set the vehicle demand power P veh Distribute to the fuel cell and other energy sources to determine the net output power P of the fuel cell fc , and sent to the fuel cell controller.

[0178] This application can better characterize the macroscopic decay of fuel cell voltage across the entire current range and more reasonably quantify the health status of the fuel cell. It also updates the fuel cell's performance decay parameters in real time, dynamically adjusting the upper and lower output power limits, output power change rate limit, and maximum output current limit. This prevents forced rapid load changes after performance decay, delays further life decay caused by material transfer obstruction and electrochemical reaction slowdown due to the degradation of material physical properties, and keeps the fuel cell operating within a high-efficiency current range. Furthermore, based on the fuel cell's real-time health status, the maximum output current limit on the fuel cell side of the fuel cell hybrid system can be dynamically adjusted to prevent the fuel cell from operating in a high-current mass transfer loss zone, keeping the fuel cell operating within a high-efficiency current range.

[0179] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the method. In order to realize the above functions, the power determination device or electronic device includes a hardware structure and / or software module corresponding to the execution of each function. It should be easy for those skilled in the art to realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0180] In the embodiment of the present application, the power determination device or electronic device can be divided into functional modules according to the above method. For example, the power determination device or electronic device can include various functional modules corresponding to the functional divisions, or two or more functions can be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation.

[0181] Figure 13 FIG. 1 is a block diagram of a power determination device according to an exemplary embodiment. Figure 13 The power determination device 1300 includes: an acquisition module 1301 and a processing module 1302.

[0182] The acquisition module 1301 is used to obtain the vehicle's operating cost parameters and the fuel cell's performance attenuation parameters, the operating cost parameters are used to indicate the energy consumption cost of the vehicle during operation, and the performance attenuation parameters are used to indicate the attenuation degree of the fuel cell; the processing module 1302 is used to determine the relationship between the total cost consumed during vehicle operation and the variable parameters based on the operating cost parameters, the variable parameters including: the net output power of the fuel cell, the rate of change of the net output power and the output current of the fuel cell; the processing module 1302 is also used to determine the value range of the variable parameters based on the performance attenuation parameters; the processing module 1302 is also used to determine the target net output power of the fuel cell based on the relationship between the total cost and the variable parameters and the value range of the variable parameters.

[0183] In a possible implementation, the processing module 1302 is specifically configured to determine, based on the relationship between the total cost and the variable parameters, the net output power in the variable parameters corresponding to the minimum total cost as the target net output power.

[0184] In one possible embodiment, the operating cost parameters include the attenuation cost of the fuel cell and other costs, and the other costs include at least one of the following: the fuel consumption cost of the fuel cell, the electricity consumption cost, and the attenuation cost of the power battery; the processing module 1302 is specifically used to determine the requested power allocated to the fuel cell and the requested power allocated to other power equipment based on the required power of the vehicle, and the other power equipment includes at least a power battery; the processing module 1302 is specifically used to determine the operating cost parameters based on the requested power allocated to the fuel cell and the requested power allocated to other power equipment.

[0185] In one possible embodiment, the processing module 1302 is specifically used to determine the value range of the variable parameter based on the performance attenuation parameter and preset constraints, and the preset constraints include: a preset power upper limit and a preset power lower limit corresponding to the net output power of the fuel cell, a preset change rate upper limit and a preset change rate lower limit corresponding to the net output power, and a preset maximum output current corresponding to the output current of the fuel cell.

[0186] In one possible embodiment, the processing module 1302 is specifically used to determine the product of the performance attenuation parameter and the preset power upper limit as the target power upper limit, and to determine the product of the performance attenuation parameter and the preset power lower limit as the target power lower limit; the processing module 1302 is specifically used to determine the product of the performance attenuation parameter and the preset change rate upper limit as the target change rate upper limit, and to determine the product of the performance attenuation parameter and the preset change rate lower limit as the target change rate lower limit; the processing module 1302 is specifically used to determine the product of the performance attenuation parameter and the preset maximum output current as the target maximum output current, and to obtain the value range of the variable parameter.

[0187] In one possible embodiment, the processing module 1302 is specifically used to determine the relationship between the quality of fuel consumed during vehicle operation and the variable parameters based on the relationship between the total cost and the variable parameters and the fuel price; the processing module 1302 is specifically used to determine the target net output power of the fuel cell based on the relationship between the fuel quality and the variable parameters and the value range of the variable parameters.

[0188] In one possible embodiment, the processing module 1302 is also used to determine at least one set of operating data corresponding to each of multiple preset power values ​​from multiple sets of operating data of the fuel cell, each set of operating data including: the net output power of the fuel cell, the stack current and the stack voltage; the processing module 1302 is also used to determine, for any one of the multiple preset power values, the center coordinate point corresponding to any preset power value in the preset coordinate system based on the coordinate point of at least one set of operating data corresponding to any preset power value in the preset coordinate system; the processing module 1302 is also used to connect the center coordinate points corresponding to each of the multiple preset power values ​​in the preset coordinate system in sequence to obtain a target performance curve, so as to represent the current performance information of the fuel cell through the target performance curve; the processing module 1302 is also used to determine the performance attenuation parameter of the fuel cell based on the current performance information, the first performance information and the second performance information, the first performance information being the performance information when the fuel cell is not attenuated, and the second performance information being the performance information when the attenuation degree of the fuel cell is the preset attenuation degree.

[0189] In one possible embodiment, the processing module 1302 is specifically used to determine the area of ​​a first closed area formed by the target performance curve and the first performance curve, and the area of ​​a second closed area formed by the first performance curve and the second performance curve, the first performance curve represents first performance information, and the second performance curve represents second performance information; the processing module 1302 is specifically used to determine the performance attenuation parameter of the fuel cell based on the area of ​​the first closed area and the area of ​​the second closed area.

[0190] In one possible embodiment, the processing module 1302 is specifically used to determine, for any one of a plurality of preset power values, a power interval corresponding to any one of the preset power values; the processing module 1302 is specifically used to determine, among a plurality of sets of operating data, at least one set of operating data whose net output power is within the power interval corresponding to any one of the preset power values ​​as at least one set of operating data corresponding to any one of the preset power values.

[0191] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0192] Figure 14FIG. 1 is a block diagram of an electronic device according to an exemplary embodiment. Figure 14 As shown, the electronic device 1400 includes but is not limited to: a processor 1401 and a memory 1402 .

[0193] The memory 1402 is configured to store executable instructions of the processor 1401. It is understood that the processor 1401 is configured to execute instructions to implement the power determination method in the above embodiment.

[0194] It should be noted that those skilled in the art can understand that Figure 14 The electronic device structure shown in the figure does not limit the electronic device, and the electronic device may include Figure 14 More or fewer components may be shown, or certain components may be combined, or the components may be arranged differently.

[0195] The processor 1401 is the control center of the electronic device. It uses various interfaces and lines to connect the various parts of the entire electronic device. By running or executing software programs and / or modules stored in the memory 1402 and calling data stored in the memory 1402, it performs various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. The processor 1401 may include one or more processing units. Optionally, the processor 1401 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly handles wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 1401.

[0196] Memory 1402 can be used to store software programs and various data. Memory 1402 may primarily include a program storage area and a data storage area. The program storage area may store an operating system and application programs required by at least one functional module (such as a processing module). Furthermore, memory 1402 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0197] In an exemplary embodiment, a computer-readable storage medium including instructions is further provided, such as a memory 1402 including instructions. The above instructions can be executed by the processor 1401 of the electronic device 1400 to implement the power determination method in the above embodiment.

[0198] In actual implementation, Figure 13 The functions of the acquisition module 1301 and the processing module 1302 can be represented by Figure 14The processor 1401 in the embodiment calls the computer program stored in the memory 1402. The specific execution process can be referred to the description of the power determination method in the above embodiment, which will not be repeated here.

[0199] Optionally, the computer-readable storage medium may be a non-temporary computer-readable storage medium, for example, the non-temporary computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0200] In an exemplary embodiment, the present application also provides a computer program product including one or more instructions, which can be executed by the processor 1401 of the electronic device 1400 to implement the power determination method in the above embodiment.

[0201] It should be noted that when the instructions in the above-mentioned computer-readable storage medium or one or more instructions in the computer program product are executed by the processor of the electronic device, the various processes of the above-mentioned power determination method embodiment are implemented, and the same technical effect as the above-mentioned power determination method can be achieved. To avoid repetition, they will not be repeated here.

[0202] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete the full classification or partial functions described above.

[0203] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0204] The units described as separate components may or may not be physically separate, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0205] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0206] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or the full classification part or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to execute the full classification part or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks or optical disks.

[0207] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A power determination method, characterized in that: The method comprises: Obtaining an operating cost parameter of the vehicle and a performance degradation parameter of the fuel cell, wherein the operating cost parameter is used to indicate the energy consumption cost of the vehicle during operation, and the performance degradation parameter is used to indicate the degradation degree of the fuel cell; determining, based on the operating cost parameter, a relationship between a total cost consumed during operation of the vehicle and variable parameters, the variable parameters comprising: a net output power of the fuel cell, a rate of change of the net output power, and an output current of the fuel cell; Determining a value range of the variable parameter based on the performance degradation parameter; The target net output power of the fuel cell is determined based on the relationship between the total cost and the variable parameter and the value range of the variable parameter.

2. The method according to claim 1, characterized in that Determining the target net output power of the fuel cell based on the relationship between the total cost and the variable parameter and the value range of the variable parameter includes: Based on the relationship between the total cost and the variable parameters, the net output power among the variable parameters corresponding to the minimum total cost is determined as the target net output power.

3. The method according to claim 1, characterized in that The operating cost parameters include the attenuation cost and other costs of the fuel cell, and the other costs include at least one of the following: the fuel consumption cost, the power consumption cost, and the attenuation cost of the power battery of the fuel cell; The obtaining of the vehicle's operating cost parameters includes: Determining, based on the required power of the vehicle, a requested power allocated to the fuel cell and a requested power allocated to other power devices, the other power devices including at least the power battery; The operating cost parameter is determined based on the requested power allocated to the fuel cell and the requested power allocated to the other power devices.

4. The method according to claim 1, wherein The determining, based on the performance degradation parameter, a value range of the variable parameter includes: Based on the performance attenuation parameter and preset constraints, the value range of the variable parameter is determined. The preset constraints include: a preset power upper limit and a preset power lower limit corresponding to the net output power of the fuel cell, a preset change rate upper limit and a preset change rate lower limit corresponding to the net output power, and a preset maximum output current corresponding to the output current of the fuel cell.

5. The method according to claim 4, characterized in that The determining of the value range of the variable parameter based on the performance degradation parameter and the preset constraint condition includes: Determining a target power upper limit as a product of the performance degradation parameter and the preset power upper limit, and determining a target power lower limit as a product of the performance degradation parameter and the preset power lower limit; Determining a target change rate upper limit as a product of the performance decay parameter and the preset change rate upper limit, and determining a target change rate lower limit as a product of the performance decay parameter and the preset change rate lower limit; The product of the performance degradation parameter and the preset maximum output current is determined as the target maximum output current, and the value range of the variable parameter is obtained.

6. The method according to any one of claims 1 to 5, characterized in that Determining the target net output power of the fuel cell based on the relationship between the total cost and the variable parameter and the value range of the variable parameter includes: determining a relationship between a mass of fuel consumed during operation of the vehicle and the variable parameter based on a relationship between the total cost and the variable parameter and a fuel price; The target net output power of the fuel cell is determined based on the relationship between the fuel quality and the variable parameter and the value range of the variable parameter.

7. The method according to any one of claims 1 to 5, characterized in that The method further comprises: Determining at least one set of operating data corresponding to each of a plurality of preset power values ​​from a plurality of sets of operating data of the fuel cell, each set of operating data comprising: a net output power, a stack current, and a stack voltage of the fuel cell; For any one of the plurality of preset power values, determining a center coordinate point corresponding to the any one of the preset power values ​​in the preset coordinate system based on a coordinate point of at least one set of operating data corresponding to the any one of the preset power values ​​in the preset coordinate system; sequentially connecting the central coordinate points corresponding to each of the plurality of preset power values ​​in the preset coordinate system to obtain a target performance curve, so as to represent current performance information of the fuel cell through the target performance curve; The performance attenuation parameter of the fuel cell is determined based on the current performance information, the first performance information, and the second performance information, wherein the first performance information is the performance information when the fuel cell has not attenuated, and the second performance information is the performance information when the attenuation degree of the fuel cell is a preset attenuation degree.

8. The method according to claim 7, characterized in that The determining the performance degradation parameter of the fuel cell based on the current performance information, the first performance information, and the second performance information includes: determining an area of ​​a first closed region formed by the target performance curve and a first performance curve, and an area of ​​a second closed region formed by the first performance curve and a second performance curve, the first performance curve representing the first performance information, and the second performance curve representing the second performance information; The performance degradation parameter of the fuel cell is determined based on the area of ​​the first enclosed region and the area of ​​the second enclosed region.

9. The method according to claim 7, characterized in that The step of determining at least one set of operating data corresponding to each of a plurality of preset power values ​​from the plurality of sets of operating data of the fuel cell comprises: For any one of the plurality of preset power values, determining a power interval corresponding to the any one of the preset power values; Among the multiple sets of operating data, at least one set of operating data whose net output power is within the power interval corresponding to any one of the preset power values ​​is determined as the at least one set of operating data corresponding to any one of the preset power values.

10. A power determination device, characterized in that: The power determination device includes: an acquisition module and a processing module; The acquisition module is used to acquire an operating cost parameter of the vehicle and a performance attenuation parameter of the fuel cell, wherein the operating cost parameter is used to indicate the energy consumption cost of the vehicle during operation, and the performance attenuation parameter is used to indicate the attenuation degree of the fuel cell; The processing module is configured to determine, based on the operating cost parameter, a relationship between a total cost consumed during operation of the vehicle and variable parameters, the variable parameters comprising: a net output power of the fuel cell, a rate of change of the net output power, and an output current of the fuel cell; The processing module is further configured to determine a value range of the variable parameter based on the performance degradation parameter; The processing module is further configured to determine the target net output power of the fuel cell based on the relationship between the total cost and the variable parameter and the value range of the variable parameter.

11. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the method according to any one of claims 1 to 9.

12. A vehicle, characterized in that: The vehicle comprises the power determination device according to claim 10 , and the vehicle is configured to implement the method according to any one of claims 1 to 9 .

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