Fuel cell life prediction method, device and equipment and storage medium

Abstract

The invention discloses a fuel cell life prediction method, device and equipment and a storage medium, and the method comprises the steps: carrying out the voltage test of a target fuel cell in a current test period under the condition that the actual usage amount of the target fuel cell in the current test period does not reach a preset usage range, determining a first voltage variation of the target fuel cell; based on the battery voltage corresponding to the starting moment of the current test period and the first voltage variation, determining the battery voltage corresponding to the starting moment of the next test period and determining the next test period as the current test period; repeatedly executing the operation until the actual usage amount reaches a preset usage range; executing the operation to determine a second voltage variation of the target fuel cell; and based on the actual usage amount and the battery voltage, determining a target corresponding relation between the actual usage amount of the target fuel cell and the battery voltage to predict the service life of the to-be-predicted fuel cell. According to the invention, the prediction efficiency and convenience of life prediction can be improved.

Description

Technical Field

[0001] The present application relates to the field of fuel cell technology, and in particular to a fuel cell life prediction method, device, equipment and storage medium. Background Art

[0002] A fuel cell is a chemical device that directly converts the chemical energy of a fuel into electrical energy. As one type of fuel cell, a proton exchange membrane fuel cell (PEMFC) uses a proton conductive polymer film as an electrolyte, carbon-supported platinum or platinum-cobalt as a catalyst, hydrogen gas at the anode and oxygen (usually replaced by air) at the cathode, and generates electricity through electrochemical reactions. Cars using proton exchange membrane fuel cells have the advantages of zero emissions, fast hydrogen refueling, and long driving range. However, with the small-scale application in the market in recent years, the life of fuel cells has become a key issue restricting the large-scale development of fuel cell products and has received more and more attention. More and more customers have taken longer life as one of the important indicators for the development or selection of fuel cell stack products.

[0003] In the prior art, the life prediction of fuel cells is mainly to obtain relevant data to establish a training data set to obtain a prediction model, and then predict the life of the fuel cell based on the prediction model. However, during the establishment of the prediction model, the training process is relatively long, and the training data is relatively large, which will affect the efficiency of life prediction. Summary of the invention

[0004] In order to solve the above problems, the present application discloses a fuel cell life prediction method, device, equipment and storage medium, by performing a voltage test on the target fuel cell in the current test cycle when the actual usage corresponding to the target fuel cell in the current test cycle does not reach the preset usage range, determining the first voltage change of the target fuel cell; based on the battery voltage corresponding to the start time of the current test cycle and the first voltage change, determining the battery voltage corresponding to the start time of the next test cycle and determining the next test cycle as the current test cycle; repeating the above operation until the actual usage reaches the preset usage range; performing the above operation to determine the second voltage change of the target fuel cell; based on the actual usage and the battery voltage, determining the target corresponding relationship between the actual usage of the target fuel cell and the battery voltage to predict the life of the fuel cell to be predicted. By obtaining the real data of the target fuel cell during use and performing real-time quantifiable testing according to the state of the stack, the target corresponding relationship between the actual usage of the target fuel cell and the battery voltage is obtained, and the life prediction is performed based on the target corresponding relationship, which can improve the prediction efficiency and convenience of life prediction.

[0005] In order to achieve the above-mentioned invention object, the present application provides a fuel cell life prediction method, the method comprising:

[0006] When the actual usage of the target fuel cell in the current test cycle does not reach the preset usage range, a voltage test is performed on the target fuel cell in the current test cycle to determine a first voltage change of the target fuel cell in the current test cycle;

[0007] Determining the battery voltage corresponding to the start time of the next test cycle based on the battery voltage corresponding to the start time of the current test cycle and the first voltage change;

[0008] Determine the next test cycle as the current test cycle;

[0009] Repeatedly perform: when the actual usage of the target fuel cell in the current test cycle does not reach the preset usage range, perform a voltage test on the fuel cell in the current test cycle to determine a first voltage change of the target fuel cell in the current test cycle; determine a battery voltage corresponding to the start time of the next test cycle based on the battery voltage corresponding to the start time of the current test cycle and the first voltage change; determine the next test cycle as the current test cycle; until the actual usage of the target fuel cell in the current test cycle reaches the preset usage range;

[0010] Performing a voltage test on the target fuel cell to determine a second voltage change amount of the target fuel cell in the current test cycle;

[0011] Based on the actual usage of the target fuel cell corresponding to each current test cycle and the battery voltage corresponding to the starting time of each current test cycle, a target corresponding relationship between the actual usage of the target fuel cell and the battery voltage is determined; the target corresponding relationship is used to predict the life of the fuel cell to be predicted.

[0012] In some embodiments, performing a voltage test on the target fuel cell in the current test cycle to determine a first voltage change amount of the target fuel cell in the current test cycle includes:

[0013] Dividing the current test cycle into a plurality of second test cycles on average;

[0014] Performing a voltage test on the target fuel cell in each of the second test cycles to determine a single voltage change amount of the target fuel cell in each of the second test cycles;

[0015] Based on the single voltage variation, a first voltage variation of the target fuel cell in the current test cycle is determined.

[0016] In some embodiments, determining the first voltage change amount of the target fuel cell in the current test cycle based on the single voltage change amount includes:

[0017] Determine an average voltage change amount of the single voltage changes respectively corresponding to the plurality of second test cycles;

[0018] The average voltage variation is determined as a first voltage variation of the target fuel cell in the current test cycle.

[0019] In some embodiments, performing a voltage test on the target fuel cell in each of the second test cycles to determine a single voltage change of the target fuel cell in each of the second test cycles includes:

[0020] Acquire a first current density corresponding to the target fuel cell at the start time of each second test cycle and a first stable voltage value corresponding to the first current density;

[0021] At the start time of each second test cycle, the first current density is adjusted to the second current density, and a voltage change curve and a voltage change straight line of the target fuel cell are obtained; the voltage change curve is generated based on the voltage change process of the target fuel cell from the first stable voltage value to the second stable voltage value corresponding to the second current density; the voltage change straight line is determined based on the connection between the first voltage point and the second voltage point; the first voltage point is the point corresponding to the first straight line corresponding to the first stable voltage value at the start time of the second test cycle; the second voltage point is the point corresponding to the second straight line corresponding to the second stable voltage value at the start time of changing to the second stable voltage value;

[0022] The area of ​​a closed region formed by the voltage variation curve and the voltage variation straight line is determined as a single voltage variation of the target fuel cell in each of the second test cycles.

[0023] In some embodiments, determining the target corresponding relationship between the actual usage of the target fuel cell and the battery voltage based on the actual usage of the target fuel cell corresponding to each current test cycle and the battery voltage corresponding to the start time of each current test cycle includes:

[0024] Performing linear fitting on the actual usage of the target fuel cell corresponding to each current test cycle and the battery voltage corresponding to the start time of each current test cycle to obtain a linear fitting result;

[0025] The linear fitting result is determined as a target corresponding relationship between the actual usage amount of the target fuel cell and the battery voltage.

[0026] In some embodiments, the method further comprises:

[0027] Acquiring the residual voltage of the fuel cell to be predicted;

[0028] Based on the target corresponding relationship and the remaining voltage, the remaining usage amount of the fuel cell to be predicted corresponding to the remaining voltage is determined.

[0029] In some embodiments, when the actual usage of the target fuel cell in the current test cycle does not reach the preset usage range, before performing a voltage test on the target fuel cell in the current test cycle and determining a first voltage change of the target fuel cell in the current test cycle, the method further includes:

[0030] activating the target fuel cell;

[0031] Performing polarization processing on the activated target fuel cell to obtain a polarization result;

[0032] When the polarization result indicates that the target fuel cell is in a polarized state, a polarization elimination operation is performed on the target fuel cell.

[0033] The present application also provides a fuel cell life prediction device, the fuel cell life prediction device comprising:

[0034] A first voltage testing module, configured to perform a voltage test on the target fuel cell in the current test cycle to determine a first voltage change of the target fuel cell in the current test cycle if the actual usage of the target fuel cell in the current test cycle does not reach a preset usage range;

[0035] A battery voltage determination module, used to determine the battery voltage corresponding to the start time of the next test cycle based on the battery voltage corresponding to the start time of the current test cycle and the first voltage change;

[0036] A current test cycle determination module, used to determine the next test cycle as the current test cycle;

[0037] A repeated execution module, for repeatedly executing: if the actual usage of the target fuel cell in the current test cycle does not reach the preset usage range, performing a voltage test on the fuel cell in the current test cycle to determine a first voltage change of the target fuel cell in the current test cycle; determining a battery voltage corresponding to the start time of the next test cycle based on the battery voltage corresponding to the start time of the current test cycle and the first voltage change; determining the next test cycle as the current test cycle; until the actual usage of the target fuel cell in the current test cycle reaches the preset usage range;

[0038] A second voltage testing module, used to perform a voltage test on the target fuel cell to determine a second voltage change amount of the target fuel cell in the current test cycle;

[0039] A target correspondence determination module is used to determine a target correspondence between the actual usage of the target fuel cell and the battery voltage based on the actual usage of the target fuel cell corresponding to each current test cycle and the battery voltage corresponding to the start time of each current test cycle; the target correspondence is used to predict the life of the fuel cell to be predicted.

[0040] The present application also provides an electronic device, which includes a processor and a memory, wherein the memory stores at least one instruction or at least one program, and the at least one instruction or at least one program is loaded by the processor and executes the above-mentioned fuel cell life prediction method.

[0041] The present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, the above-mentioned fuel cell life prediction method is implemented.

[0042] By implementing the embodiments of the present application, the following beneficial effects can be achieved:

[0043] The embodiment of the present application determines the first voltage change of the target fuel cell by performing a voltage test on the target fuel cell in the current test cycle when the actual usage corresponding to the target fuel cell in the current test cycle does not reach the preset usage range; based on the battery voltage corresponding to the start time of the current test cycle and the first voltage change, determine the battery voltage corresponding to the start time of the next test cycle and determine the next test cycle as the current test cycle; repeat the above operation until the actual usage reaches the preset usage range; perform the above operation to determine the second voltage change of the target fuel cell; based on the actual usage and the battery voltage, determine the target corresponding relationship between the actual usage of the target fuel cell and the battery voltage to predict the life of the fuel cell to be predicted. By obtaining the real data of the target fuel cell during use and performing real-time quantifiable tests according to the state of the stack, the target corresponding relationship between the actual usage of the target fuel cell and the battery voltage is obtained to predict the life. By obtaining the real data of the target fuel cell in different test cycles, the corresponding relationship between the actual usage of the battery and the battery voltage is obtained, so as to predict the life of the fuel cell to be predicted, which can improve the prediction efficiency and convenience of life prediction. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the fuel cell life prediction method, device, equipment and storage medium described in the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0045] Figure 1 It is a flow chart of a fuel cell life prediction method provided in an embodiment of the present application;

[0046] Figure 2 is a flow chart of a method for determining a first voltage variation of a target fuel cell provided in an embodiment of the present application;

[0047] Figure 3 It is a flow chart of a method for determining a single voltage change amount of a target fuel cell provided in an embodiment of the present application;

[0048] Figure 4 is a schematic diagram of a method for determining a single voltage change of a target fuel cell provided in an embodiment of the present application;

[0049] Figure 5 is a flow chart of a method for determining a state of a target fuel cell to be tested provided in an embodiment of the present application;

[0050] Figure 6It is a structural schematic diagram of a fuel cell life prediction device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the information used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0053] In the prior art, the life prediction of fuel cells is mainly to obtain relevant data to establish a training data set to obtain a prediction model, and then predict the life of the fuel cell based on the prediction model. However, during the establishment of the prediction model, the training process is relatively long, and the training data is relatively large, which will affect the efficiency of life prediction.

[0054] See also Figure 1 , which shows a flow chart of a fuel cell life prediction method provided in an embodiment of the present application. This specification provides the method operation steps described in the embodiment or flow chart. The order of steps listed in the embodiment is only one way of executing the steps among many, and does not represent the only execution order. The fuel cell life prediction method can be executed in the order of the method shown in the embodiment or the accompanying drawings. Specifically, Figure 1 As shown, the method may include the following steps:

[0055] S101: When the actual usage of the target fuel cell in the current test cycle does not reach the preset usage range, perform a voltage test on the target fuel cell in the current test cycle to determine a first voltage change of the target fuel cell in the current test cycle;

[0056] In this embodiment, the target fuel cell may be a proton exchange membrane fuel cell, and the duration of the current test cycle is a preset duration. For example, the duration of the current test cycle may be 5 minutes or 10 minutes. The actual usage of the target fuel cell corresponding to the current test cycle may be acquired through the sensor in the stack test bench; the preset usage range is preset in advance and is used to compare with the actual usage to determine subsequent operations. For example, the preset usage range may be [90%, 100%]. The specific execution process of this embodiment may be: firstly connect the target fuel cell to the stack test bench, and then acquire the actual usage of the target fuel cell in the current test cycle through the sensor in the stack test bench; compare the actual usage with the preset usage range, and when the actual usage of the target fuel cell corresponding to the current test cycle does not reach the preset usage range, perform a voltage test on the target fuel cell in the current test cycle to determine the first voltage change of the target fuel cell in the current test cycle.

[0057] In some exemplary embodiments, see Figure 2 , which is a flow chart of a method for determining a first voltage variation of a target fuel cell provided in an embodiment of the present application. Figure 2 As shown, the voltage test is performed on the target fuel cell in the current test cycle, and determining the first voltage change amount of the target fuel cell in the current test cycle includes:

[0058] S201: Divide the current test cycle into a plurality of second test cycles on an even basis;

[0059] Specifically, the number of the second test cycles is determined in advance according to the actual situation. For example, when the test duration of the current test cycle is 5 minutes, and the number of second test cycles is set to 10, the test duration of each second test cycle is 30 seconds; when the test duration of the current test cycle is 5 minutes, and the number of second test cycles is set to 5, the test duration of each second test cycle is 1 minute. It should be noted that the specific number of second test cycles is not limited here.

[0060] S203: performing a voltage test on the target fuel cell in each of the second test cycles to determine a single voltage change of the target fuel cell in each of the second test cycles;

[0061] Specifically, a voltage test is performed on the target fuel cell in each second test cycle to obtain a single voltage change amount corresponding to each second test cycle of the target fuel cell.

[0062] S205: Determine a first voltage change amount of the target fuel cell in the current test cycle based on the single voltage change amount.

[0063] Specifically, after the single voltage variation corresponding to each second test cycle is determined, the average voltage variation of multiple single voltage variations is calculated to obtain the first voltage variation corresponding to the entire current test cycle.

[0064] By evenly dividing the current test cycle into multiple second test cycles, and performing a voltage test on the target fuel cell in each second test cycle, the single voltage change corresponding to each second test cycle is obtained, and the first voltage change is obtained by calculating the average of multiple single voltage changes. This can eliminate the problem of inaccurate voltage testing caused by extreme factors such as voltage jumps, thereby reducing voltage testing errors and further improving the accuracy of determining the first voltage change.

[0065] In some exemplary embodiments, determining the first voltage variation of the target fuel cell in the current test cycle based on the single voltage variation includes:

[0066] Determine an average voltage change amount of the single voltage changes respectively corresponding to the plurality of second test cycles;

[0067] The average voltage variation is determined as a first voltage variation of the target fuel cell in the current test cycle.

[0068] In the above exemplary embodiment, specifically, the first voltage change amount = the sum of the single voltage changes corresponding to each second test cycle / the number of second test cycles, that is, the average voltage change amount of multiple single voltage changes is calculated to obtain the first voltage change amount corresponding to the entire current test cycle. For example, when the number of second test cycles is 5, the voltage changes corresponding to each second test cycle are 10.27, 10.35, 10.38, 10.54, and 10.62, respectively, then the first voltage change amount = average voltage change amount = (10.27 + 10.35 + 10.38 + 10.54 + 10.62) / 5 = 10.43.

[0069] By averaging multiple single voltage changes to obtain an average voltage change, and determining the average voltage change as the first voltage change, the problem of inaccurate voltage testing caused by extreme factors such as voltage jumps can be eliminated, thereby reducing voltage testing errors and further improving the accuracy of determining the first voltage change.

[0070] In some exemplary embodiments, see Figure 3 , which is a flow chart of a method for determining a single voltage variation of a target fuel cell. Figure 3 As shown, the voltage test is performed on the target fuel cell in each of the second test cycles, and determining a single voltage change amount of the target fuel cell in each of the second test cycles includes:

[0071] S301: Acquire a first current density corresponding to the target fuel cell at the start time of each second test cycle and a first stable voltage value corresponding to the first current density;

[0072] Specifically, see Figure 4 , which is a schematic diagram of a method for determining a single voltage change of a target fuel cell. Figure 4 As shown, the voltage value changes with the change of the current density. Point a represents the first stable voltage value corresponding to the start time of the second test cycle, and the first stable voltage value is determined according to the first current density of the target fuel cell in a stable state.

[0073] S303: At the start time of each second test cycle, the first current density is adjusted to a second current density, and a voltage change curve and a voltage change straight line of the target fuel cell are obtained;

[0074] In the above exemplary embodiment, the voltage change curve is generated based on the voltage change process of the target fuel cell from the first stable voltage value to the second stable voltage value corresponding to the second current density; the voltage change straight line is determined based on the connection between the first voltage point and the second voltage point; the first voltage point is the point corresponding to the first straight line corresponding to the first stable voltage value at the start time of the second test cycle; the second voltage point is the point corresponding to the second straight line corresponding to the second stable voltage value at the start time of changing to the second stable voltage value;

[0075] Specifically, the first straight line corresponding to the first stable voltage value corresponds to the point at the start time of the second test cycle, that is, Figure 4 At point a in the figure, the first current density is adjusted to the second current density, the voltage changes continuously, and then stabilizes at the second stable voltage value. The second straight line corresponding to the second stable voltage value becomes the point corresponding to the starting moment of the second stable voltage value, that is, Figure 4 The voltage change process is determined as the voltage change curve, that is, Figure 4 Curve ① in the figure, connect point a and point b to get the voltage change straight line, that is Figure 4 The curve in ②.

[0076] S305: Determine the area of ​​a closed region formed by the voltage variation curve and the voltage variation straight line as a single voltage variation of the target fuel cell in each of the second test cycles.

[0077] Specifically, the closed area formed by the voltage change curve, i.e., curve ①, and the voltage change straight line, i.e., curve ②, is determined as the single voltage change of the target fuel cell in each second test cycle, i.e., the shaded area is the single voltage change.

[0078] By adjusting the current density of the target fuel cell in each second test cycle, recording the voltage change process based on the adjusted current density, and finally determining the area of ​​the closed region formed by the voltage change curve and the voltage change straight line as the single voltage change of the target fuel cell in the second test cycle, the authenticity of the data processing can be guaranteed, and at the same time, the accuracy of obtaining the single voltage change can be improved, thereby further ensuring the accuracy of the subsequent life prediction method.

[0079] Another method for determining the single voltage change is to directly determine it according to the voltage attenuation between the first stable voltage value and the second stable voltage value. For example, when the first stable voltage value is 0.7V and the second stable voltage value is 0.68V, the voltage attenuation is (0.7-0.68) / 0.7=2.86%.

[0080] In some exemplary embodiments, see Figure 5 , which is a flow chart of a method for determining the state of a target fuel cell to be tested. Figure 5 As shown, when the actual usage of the target fuel cell in the current test cycle does not reach the preset usage range, a voltage test is performed on the target fuel cell in the current test cycle, and before determining a first voltage change amount of the target fuel cell in the current test cycle, the method further includes:

[0081] S501: activating the target fuel cell;

[0082] Specifically, the method of activating the target fuel cell may be to perform an activation process on the target fuel cell so that the target fuel cell is in a state to be tested.

[0083] S503: performing polarization processing on the activated target fuel cell to obtain a polarization result;

[0084] Specifically, after the target fuel cell is activated by an activation treatment, the target fuel cell is polarized to obtain a polarization result; the polarization result is used to determine whether the target fuel cell is in a polarized state.

[0085] S505: When the polarization result indicates that the target fuel cell is in a polarized state, perform a polarization elimination operation on the target fuel cell.

[0086] Specifically, when the polarization result of the target fuel cell is that the target fuel cell is in a polarized state, a polarization elimination operation is performed on the target fuel cell, wherein the polarization elimination operation includes but is not limited to periodic discharge / charge, high-speed charging, temperature control, use of polarizer, appropriate selection of electrode materials and electrolytes, increase of negative pulses, small current repair methods, etc.

[0087] By activating the target fuel cell before performing a voltage test on the target fuel cell and depolarizing the target fuel cell when the target fuel cell is in a polarized state, the influence of other factors before the test is eliminated, preparations are made, and the target fuel cell is ensured to be in a normal state to be tested, thereby further ensuring the accuracy of the subsequent life prediction method.

[0088] S103: determining the battery voltage corresponding to the start time of the next test cycle based on the battery voltage corresponding to the start time of the current test cycle and the first voltage change;

[0089] In this embodiment, specifically, the battery voltage corresponding to the start time of the current test cycle and the first voltage change amount obtained after the voltage test are obtained to determine the battery voltage corresponding to the start time of the next test cycle; that is, the battery voltage corresponding to the start time of the next test cycle can be understood as the battery voltage corresponding to the start time of the current test cycle after the change of the first voltage change amount, and the battery voltage corresponding to the end time of the current test cycle. Or it can be understood that the battery voltage corresponding to the start time of the next test cycle is the battery voltage corresponding to the end time of the previous adjacent test cycle. It should be noted that the test time interval between two test cycles can be fixed or adjustable, depending on the actual situation, and is not specifically limited here.

[0090] S105: Determine the next test cycle as the current test cycle;

[0091] In this embodiment, specifically, the next test cycle is determined as the current test cycle, so that the subsequent voltage test method in the current test cycle is executed.

[0092] S107: Repeatedly execute: if the actual usage of the target fuel cell in the current test cycle does not reach the preset usage range, perform a voltage test on the fuel cell in the current test cycle to determine a first voltage change of the target fuel cell in the current test cycle; determine a battery voltage corresponding to the start time of the next test cycle based on the battery voltage corresponding to the start time of the current test cycle and the first voltage change; determine the next test cycle as the current test cycle; until the actual usage of the target fuel cell in the current test cycle reaches the preset usage range;

[0093] In this embodiment, specifically, when the actual usage of the target fuel cell corresponding to the current test cycle does not reach the preset usage range, the voltage test operation is repeatedly performed on the target fuel cell to obtain multiple first voltage changes until the actual usage of the target fuel cell corresponding to the current test cycle reaches the preset usage range.

[0094] S109: Performing a voltage test on the target fuel cell to determine a second voltage variation of the target fuel cell in the current test cycle.

[0095] In this embodiment, specifically, when the actual usage of the target fuel cell corresponding to the current test cycle reaches the preset usage range, the voltage test is performed on the target fuel cell again to determine the second voltage change of the target fuel cell in the current test cycle. The method for determining the second voltage change is consistent with the method for determining the first voltage change, and the method for determining the first voltage change has been described in detail in the previous embodiment, and will not be elaborated on again.

[0096] S111: Determine a target corresponding relationship between the actual usage of the target fuel cell and the battery voltage based on the actual usage of the target fuel cell in each current test cycle and the battery voltage corresponding to the start time of each current test cycle; the target corresponding relationship is used to predict the life of the fuel cell to be predicted.

[0097] In the present embodiment, specifically, the target fuel cell has a corresponding actual usage in each current test cycle and a battery voltage corresponding to the starting time of each current test cycle. Based on the actual usage and battery voltage of the period corresponding to each current test cycle, the correspondence between the actual usage and the battery voltage is obtained, and the life of the fuel cell to be predicted is predicted based on the corresponding relationship.

[0098] In some exemplary embodiments, determining the target corresponding relationship between the actual usage of the target fuel cell and the battery voltage based on the actual usage of the target fuel cell corresponding to each current test cycle and the battery voltage corresponding to the start time of each current test cycle includes:

[0099] Performing linear fitting on the actual usage of the target fuel cell corresponding to each current test cycle and the battery voltage corresponding to the start time of each current test cycle to obtain a linear fitting result;

[0100] The linear fitting result is determined as a target corresponding relationship between the actual usage amount of the target fuel cell and the battery voltage.

[0101] In the above exemplary embodiment, specifically, the linear fitting method can generate a corresponding curve graph of actual usage and battery voltage through the actual usage and battery voltage of the target fuel cell corresponding to each current test cycle, and determine the linear fitting function F(x) based on the corresponding curve graph, and the linear fitting result is the linear fitting function F(x). Wherein, x represents the battery voltage corresponding to the target fuel cell at the start time of each current test cycle, and F(x) represents the actual usage of the target fuel cell corresponding to each current test cycle.

[0102] By performing linear fitting on the actual usage of the target fuel cell corresponding to each current test cycle and the battery voltage corresponding to the starting time of each current test cycle, a target corresponding relationship between the actual usage of the target fuel cell and the battery voltage is constructed. The life prediction of the fuel cell to be predicted can be achieved simply through the target corresponding relationship, thereby improving the efficiency and convenience of life prediction.

[0103] In some exemplary embodiments, the method further comprises:

[0104] Acquiring the residual voltage of the fuel cell to be predicted;

[0105] Based on the target corresponding relationship and the remaining voltage, the remaining usage amount of the fuel cell to be predicted corresponding to the remaining voltage is determined.

[0106] In the above exemplary embodiment, specifically, when the life of the fuel cell to be predicted is to be predicted, the residual voltage of the fuel cell to be predicted is first obtained, and the residual voltage can be the battery voltage value corresponding to the fuel cell to be predicted at the current moment, and then the battery voltage value is used as the input of the linear fitting function F(x) to obtain the actual usage corresponding to the fuel cell to be predicted at the current moment, thereby obtaining the remaining usage of the fuel cell to be predicted. For example, when the battery voltage value is 0.55V, 0.55V is used as the input of the linear fitting function F(x), and the actual usage corresponding to the fuel cell to be predicted at the current moment F(0.55)=46.53% is obtained, and the remaining usage of the fuel cell to be predicted is 100%-46.53%=53.47%.

[0107] By obtaining the residual voltage of the fuel cell to be predicted and taking the residual voltage value as the input of the target corresponding relationship, the actual usage of the fuel to be predicted is output, and the remaining usage of the fuel cell to be predicted is determined based on the actual usage. The life prediction of the fuel cell to be predicted can be achieved only through the target corresponding relationship, which improves the prediction efficiency and convenience of life prediction.

[0108] The present application also provides a fuel cell life prediction device. Figure 6, which is a schematic diagram of the structure of a fuel cell life prediction device provided in an embodiment of the present application, specifically as follows Figure 6 As shown, the fuel cell life prediction device comprises:

[0109] A first voltage test module 601 is used to perform a voltage test on the target fuel cell in the current test cycle to determine a first voltage change amount of the target fuel cell in the current test cycle when the actual usage amount of the target fuel cell in the current test cycle does not reach a preset usage range;

[0110] A battery voltage determination module 603, configured to determine the battery voltage corresponding to the start time of the next test cycle based on the battery voltage corresponding to the start time of the current test cycle and the first voltage variation;

[0111] A current test cycle determination module 605, configured to determine the next test cycle as the current test cycle;

[0112] The repeat execution module 607 is used to repeatedly execute: if the actual usage of the target fuel cell in the current test cycle does not reach the preset usage range, perform a voltage test on the fuel cell in the current test cycle to determine a first voltage change of the target fuel cell in the current test cycle; determine a battery voltage corresponding to the start time of the next test cycle based on the battery voltage corresponding to the start time of the current test cycle and the first voltage change; determine the next test cycle as the current test cycle; until the actual usage of the target fuel cell in the current test cycle reaches the preset usage range;

[0113] A second voltage test module 609, configured to perform a voltage test on the target fuel cell to determine a second voltage variation of the target fuel cell in the current test cycle;

[0114] The target correspondence determination module 611 is used to determine the target correspondence between the actual usage of the target fuel cell and the battery voltage based on the actual usage of the target fuel cell corresponding to each current test cycle and the battery voltage corresponding to the starting time of each current test cycle; the target correspondence is used to predict the life of the fuel cell to be predicted.

[0115] In an optional embodiment, the fuel cell life prediction device further includes:

[0116] A second test cycle determination module, used for evenly dividing the current test cycle into a plurality of second test cycles;

[0117] a first single voltage variation determination module, configured to perform a voltage test on the target fuel cell in each of the second test cycles, and determine a single voltage variation of the target fuel cell in each of the second test cycles;

[0118] The first voltage variation first determination module is configured to determine a first voltage variation of the target fuel cell within the current test cycle based on the single voltage variation.

[0119] In an optional embodiment, the fuel cell life prediction device further includes:

[0120] An average voltage variation determination module, used to determine an average voltage variation of single voltage variations respectively corresponding to the plurality of second test cycles;

[0121] The first voltage variation second determination module is configured to determine the average voltage variation as the first voltage variation of the target fuel cell in the current test cycle.

[0122] In an optional embodiment, the fuel cell life prediction device further includes:

[0123] A voltage and current data acquisition module, used to acquire a first current density corresponding to the target fuel cell at the start time of each second test cycle and a first stable voltage value corresponding to the first current density;

[0124] A voltage change graph acquisition module is used to adjust the first current density to a second current density at the start time of each second test cycle, and acquire a voltage change curve and a voltage change straight line of the target fuel cell; the voltage change curve is generated based on the voltage change process of the target fuel cell from the first stable voltage value to the second stable voltage value corresponding to the second current density; the voltage change straight line is determined based on a line between a first voltage point and a second voltage point; the first voltage point is a point corresponding to the first straight line corresponding to the first stable voltage value at the start time of the second test cycle; the second voltage point is a point corresponding to the second straight line corresponding to the second stable voltage value at the start time of changing to the second stable voltage value;

[0125] The second single voltage variation determination module is used to determine the area of ​​a closed region formed by the voltage variation curve and the voltage variation straight line as the single voltage variation of the target fuel cell in each of the second test cycles.

[0126] In an optional embodiment, the fuel cell life prediction device further includes:

[0127] A linear fitting result determination module, used to perform linear fitting on the actual usage of the target fuel cell corresponding to each current test cycle and the battery voltage corresponding to the start time of each current test cycle to obtain a linear fitting result;

[0128] The target corresponding relationship determination submodule is used to determine the linear fitting result as the target corresponding relationship between the actual usage of the target fuel cell and the battery voltage.

[0129] In an optional embodiment, the fuel cell life prediction device further includes:

[0130] A residual voltage acquisition module, used to acquire the residual voltage of the fuel cell to be predicted;

[0131] The remaining usage amount determination module is used to determine the remaining usage amount of the fuel cell to be predicted corresponding to the remaining voltage based on the target corresponding relationship and the remaining voltage.

[0132] In an optional embodiment, the fuel cell life prediction device further includes:

[0133] an activation module, used for activating the target fuel cell;

[0134] A polarization result determination module, used to perform polarization processing on the activated target fuel cell to obtain a polarization result;

[0135] The polarization elimination module is used to perform a polarization elimination operation on the target fuel cell when the polarization result indicates that the target fuel cell is in a polarized state.

[0136] Regarding the device 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.

[0137] An embodiment of the present application also provides a fuel cell life prediction electronic device, which includes a processor and a memory, wherein the memory stores at least one instruction or at least one program, and the at least one instruction or the at least one program is loaded by the processor and executes the fuel cell life prediction method as described in the above method embodiment.

[0138] The embodiment of the present application also provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are executed by a processor, the fuel cell life prediction method described in the embodiment of the present application is implemented.

[0139] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing related hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct RAMbus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0140] The above describes specific embodiments of the present specification, and other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily have to be performed in the specific order or sequential order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0141] Each embodiment in this application is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the electronic device and computer-readable storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0142] The electronic device, computer-readable storage medium and method provided in the embodiments of the present application correspond to each other. Therefore, the electronic device and computer-readable storage medium also have similar beneficial technical effects as the corresponding methods. Since the beneficial technical effects of the methods have been described in detail above, the beneficial technical effects of the corresponding electronic device and computer-readable storage medium will not be repeated here.

[0143] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A fuel cell life prediction method, characterized in that: include: When the actual usage of the target fuel cell in the current test cycle does not reach the preset usage range, a voltage test is performed on the target fuel cell in the current test cycle to determine a first voltage change of the target fuel cell in the current test cycle; Determining the battery voltage corresponding to the start time of the next test cycle based on the battery voltage corresponding to the start time of the current test cycle and the first voltage change; Determine the next test cycle as the current test cycle; Repeating: when the actual usage of the target fuel cell in the current test cycle does not reach the preset usage range, performing a voltage test on the fuel cell in the current test cycle to determine a first voltage change of the target fuel cell in the current test cycle; Determining the battery voltage corresponding to the start time of the next test cycle based on the battery voltage corresponding to the start time of the current test cycle and the first voltage change; Determine the next test cycle as the current test cycle; until the actual usage of the target fuel cell corresponding to the current test cycle reaches the preset usage range; Performing a voltage test on the target fuel cell to determine a second voltage change amount of the target fuel cell in the current test cycle; Based on the actual usage of the target fuel cell corresponding to each current test cycle and the battery voltage corresponding to the starting time of each current test cycle, a target corresponding relationship between the actual usage of the target fuel cell and the battery voltage is determined; the target corresponding relationship is used to predict the life of the fuel cell to be predicted.

2. The method according to claim 1, characterized in that The performing a voltage test on the target fuel cell in the current test cycle to determine a first voltage change amount of the target fuel cell in the current test cycle comprises: Dividing the current test cycle into a plurality of second test cycles on average; Performing a voltage test on the target fuel cell in each of the second test cycles to determine a single voltage change amount of the target fuel cell in each of the second test cycles; Based on the single voltage variation, a first voltage variation of the target fuel cell in the current test cycle is determined.

3. The method according to claim 2, characterized in that The determining, based on the single voltage change, a first voltage change of the target fuel cell in the current test cycle comprises: Determine an average voltage change amount of the single voltage changes respectively corresponding to the plurality of second test cycles; The average voltage variation is determined as a first voltage variation of the target fuel cell in the current test cycle.

4. The method according to claim 2, characterized in that: The performing a voltage test on the target fuel cell in each of the second test cycles to determine a single voltage change amount of the target fuel cell in each of the second test cycles comprises: Acquire a first current density corresponding to the target fuel cell at the start time of each second test cycle and a first stable voltage value corresponding to the first current density; At the start time of each second test cycle, the first current density is adjusted to the second current density, and a voltage change curve and a voltage change straight line of the target fuel cell are obtained; the voltage change curve is generated based on the voltage change process of the target fuel cell from the first stable voltage value to the second stable voltage value corresponding to the second current density; the voltage change straight line is determined based on the connection between the first voltage point and the second voltage point; the first voltage point is the point corresponding to the first straight line corresponding to the first stable voltage value at the start time of the second test cycle; the second voltage point is the point corresponding to the second straight line corresponding to the second stable voltage value at the start time of becoming the second stable voltage value; The area of ​​a closed region formed by the voltage variation curve and the voltage variation straight line is determined as a single voltage variation of the target fuel cell in each of the second test cycles.

5. The method according to claim 1, characterized in that The determining of the target corresponding relationship between the actual usage of the target fuel cell and the battery voltage based on the actual usage of the target fuel cell corresponding to each current test cycle and the battery voltage corresponding to the start time of each current test cycle includes: Performing linear fitting on the actual usage of the target fuel cell corresponding to each current test cycle and the battery voltage corresponding to the start time of each current test cycle to obtain a linear fitting result; The linear fitting result is determined as a target corresponding relationship between the actual usage amount of the target fuel cell and the battery voltage.

6. The method according to claim 1, characterized in that The method comprises: Acquiring the residual voltage of the fuel cell to be predicted; Based on the target corresponding relationship and the remaining voltage, the remaining usage amount of the fuel cell to be predicted corresponding to the remaining voltage is determined.

7. The method according to claim 1, characterized in that When the actual usage of the target fuel cell in the current test cycle does not reach the preset usage range, before performing a voltage test on the target fuel cell in the current test cycle and determining a first voltage change of the target fuel cell in the current test cycle, the method further includes: activating the target fuel cell; Performing polarization processing on the activated target fuel cell to obtain a polarization result; When the polarization result indicates that the target fuel cell is in a polarized state, a polarization elimination operation is performed on the target fuel cell.

8. A fuel cell life prediction device, characterized in that: The fuel cell life prediction device comprises: A first voltage test module, configured to perform a voltage test on the target fuel cell in the current test cycle to determine a first voltage change amount of the target fuel cell in the current test cycle when the actual usage amount of the target fuel cell in the current test cycle does not reach a preset usage range; A battery voltage determination module, used to determine the battery voltage corresponding to the start time of the next test cycle based on the battery voltage corresponding to the start time of the current test cycle and the first voltage change; A current test cycle determination module, used to determine the next test cycle as the current test cycle; A repeated execution module, for repeatedly executing: if the actual usage of the target fuel cell in the current test cycle does not reach the preset usage range, performing a voltage test on the fuel cell in the current test cycle to determine a first voltage change of the target fuel cell in the current test cycle; determining a battery voltage corresponding to the start time of the next test cycle based on the battery voltage corresponding to the start time of the current test cycle and the first voltage change; determining the next test cycle as the current test cycle; until the actual usage of the target fuel cell in the current test cycle reaches the preset usage range; A second voltage testing module, used to perform a voltage test on the target fuel cell to determine a second voltage change amount of the target fuel cell in the current test cycle; A target correspondence determination module is used to determine a target correspondence between the actual usage of the target fuel cell and the battery voltage based on the actual usage of the target fuel cell corresponding to each current test cycle and the battery voltage corresponding to the start time of each current test cycle; the target correspondence is used to predict the life of the fuel cell to be predicted.

9. An electronic device, characterized in that: The electronic device includes a processor and a memory, wherein the memory stores at least one instruction or at least one program, and the at least one instruction or at least one program is loaded by the processor and executes the fuel cell life prediction method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, the fuel cell life prediction method according to any one of claims 1 to 7 is implemented.

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