A fuel cell life prediction method, device, equipment and storage medium

Abstract

The application discloses a fuel cell life prediction method, device, equipment and storage medium. The method comprises the following steps: in the case that the actual use amount of a target fuel cell in a current test period does not reach a preset use range, voltage testing is performed on the target fuel cell in the current test period, and a first voltage change amount of the target fuel cell is determined; based on the battery voltage corresponding to the starting time of the current test period and the first voltage change amount, the battery voltage corresponding to the starting time of the next test period is determined, and the next test period is determined as the current test period; the above operation is repeatedly performed until the actual use amount reaches the preset use range; the second voltage change amount of the target fuel cell is determined by performing the above operation; and the target corresponding relationship between the actual use amount and the battery voltage of the target fuel cell is determined based on the actual use amount and the battery voltage, so that the life of a fuel cell to be predicted is predicted. The application can improve the prediction efficiency and convenience of life prediction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel cells, and particularly relates to a fuel cell life prediction method, device, equipment and storage medium. BACKGROUND

[0002] A fuel cell is a chemical device that directly converts chemical energy of fuel into electrical energy, and a proton exchange membrane fuel cell (PEMFC) is one of the fuel cells, which uses a proton conductive polymer film as an electrolyte, uses carbon-supported platinum or platinum-cobalt as a catalyst, and uses hydrogen gas at the anode and oxygen gas (usually replaced by air) at the cathode to generate electricity. A car using a proton exchange membrane fuel cell has the advantages of zero emission, fast hydrogen refueling, long driving range, etc. However, with small batch applications in the market in recent years, fuel cell life, as a key problem restricting the large-scale development of fuel cell products, has been widely concerned, and more and more customers have made higher life one of the important indicators for fuel cell stack product development or selection.

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

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

[0005] In order to achieve the above-mentioned object, the application provides a fuel cell life prediction method, which comprises the following steps:

[0006] In the case that the actual usage amount of the target fuel cell corresponding to the current test period does not reach the preset usage range, performing voltage test on the target fuel cell in the current test period to determine the first voltage variation amount of the target fuel cell in the current test period;

[0007] Determining the battery voltage corresponding to the starting time of the next test period based on the battery voltage corresponding to the starting time of the current test period and the first voltage variation amount;

[0008] Determining the next test period as the current test period;

[0009] Repeating the following steps: in the case that the actual usage amount of the target fuel cell corresponding to the current test period does not reach the preset usage range, performing voltage test on the target fuel cell in the current test period to determine the first voltage variation amount of the target fuel cell in the current test period; determining the battery voltage corresponding to the starting time of the next test period based on the battery voltage corresponding to the starting time of the current test period and the first voltage variation amount; determining the next test period as the current test period; until the actual usage amount of the target fuel cell corresponding to the current test period reaches the preset usage range;

[0010] Performing voltage test on the target fuel cell to determine the second voltage variation amount of the target fuel cell in the current test period;

[0011] Determining the target corresponding relationship between the actual usage amount and the battery voltage of the target fuel cell based on the actual usage amount of the target fuel cell corresponding to each current test period and the battery voltage corresponding to the starting time of each current test period; the target corresponding relationship is used for life prediction of a fuel cell to be predicted.

[0012] In some embodiments, the step of performing voltage test on the target fuel cell in the current test period to determine the first voltage variation amount of the target fuel cell in the current test period comprises the following steps:

[0013] Dividing the current test period into a plurality of second test periods averagely;

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

[0015] determine a first voltage change amount of the target fuel cell in the current test period based on the single-time voltage change amount.

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

[0017] determining an average voltage change amount of the single-time voltage change amounts corresponding to the plurality of second test periods respectively;

[0018] determining the average voltage change amount as the first voltage change amount of the target fuel cell in the current test period.

[0019] In some embodiments, the performing voltage test on the target fuel cell in each of the second test periods to determine the single-time voltage change amount of the target fuel cell in each of the second test periods comprises:

[0020] obtaining a first current density corresponding to a starting moment of each of the second test periods and a first stable voltage value corresponding to the first current density;

[0021] adjusting the first current density to a second current density at the starting moment of each of the second test periods, obtaining a voltage change curve and a voltage change straight line of the target fuel cell; the voltage change curve is generated based on a voltage change process of the target fuel cell from the first stable voltage value to a second stable voltage value corresponding to the second current density; the voltage change straight line is determined based on a line connecting a first voltage point and a second voltage point; the first voltage point is a point of a first straight line corresponding to the first stable voltage value at the starting moment of the second test period; the second voltage point is a point of a second straight line corresponding to the second stable voltage value at a starting moment of changing to the second stable voltage value;

[0022] determining an area of a closed region formed by the voltage change curve and the voltage change straight line as the single-time voltage change amount of the target fuel cell in each of the second test periods.

[0023] In some embodiments, the determining the target corresponding relationship between the actual usage amount and the battery voltage of the target fuel cell based on the actual usage amount corresponding to each current test period and the battery voltage corresponding to a starting moment of each current test period comprises:

[0024] performing linear fitting on the actual usage amount corresponding to each current test period and the battery voltage corresponding to a starting moment of each current test period to obtain a linear fitting result;

[0025] determining the linear fitting result as a target correspondence between an actual usage amount and a cell voltage of the target fuel cell.

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

[0027] obtaining a remaining voltage of the fuel cell to be predicted;

[0028] determining, based on the target correspondence and the remaining voltage, a remaining usage amount of the fuel cell to be predicted corresponding to the remaining voltage.

[0029] In some embodiments, before the determining the first voltage variation amount of the target fuel cell in the current test period, the method further comprises:

[0030] activating the target fuel cell;

[0031] performing polarization treatment on the activated target fuel cell to obtain a polarization result;

[0032] performing polarization elimination operation on the target fuel cell in a case where the polarization result represents that the target fuel cell has a polarization state.

[0033] The application also provides a fuel cell life prediction device, which comprises:

[0034] a first voltage test module, configured to perform voltage test on a target fuel cell in a current test period in a case where an actual usage amount of the target fuel cell corresponding to the current test period does not reach a preset usage range, and determine a first voltage variation amount of the target fuel cell in the current test period;

[0035] a cell voltage determination module, configured to determine a cell voltage corresponding to a next test period start time based on a cell voltage corresponding to a current test period start time and the first voltage variation amount;

[0036] a current test period determination module, configured to determine the next test period as the current test period;

[0037] The repeating execution module is configured to repeatedly perform the following: in a case where the target fuel cell does not reach a preset use range in an actual use amount corresponding to a current test period, performing a voltage test on the fuel cell in the current test period to determine a first voltage change amount of the target fuel cell in the current test period; determining a battery voltage corresponding to a start time of a next test period based on a battery voltage corresponding to a start time of the current test period and the first voltage change amount; determining the next test period as the current test period; and repeating the above until the target fuel cell reaches the preset use range in the actual use amount corresponding to the current test period.

[0038] The second voltage test module is configured 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 period.

[0039] The target corresponding relationship determination module is configured to determine a target corresponding relationship between the actual use amount and the battery voltage of the target fuel cell based on the actual use amount of the target fuel cell corresponding to each current test period and the battery voltage corresponding to a start time of each current test period, and the target corresponding relationship is used for life prediction of a fuel cell to be predicted.

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

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

[0042] The present application has the following beneficial effects:

[0043] The embodiment of the present application determines the first voltage change amount of the target fuel cell by performing voltage testing on the target fuel cell in the current test period when the actual usage amount of the target fuel cell corresponding to the current test period does not reach the preset usage range; determines the battery voltage corresponding to the start time of the next test period based on the battery voltage corresponding to the start time of the current test period and the first voltage change amount, and determines the next test period as the current test period; repeats the above operations until the actual usage amount reaches the preset usage range; determines the second voltage change amount of the target fuel cell by performing the above operations; and determines the target corresponding relationship between the actual usage amount and the battery voltage of the target fuel cell based on the actual usage amount 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 amount and the battery voltage of the target fuel cell is obtained to predict the life. By obtaining the real data of the target fuel cell in different test periods, the corresponding relationship between the actual usage amount and the battery voltage of the battery 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 DRAWINGS

[0044] In order to more clearly illustrate the fuel cell life prediction method, device, equipment and storage medium provided by the present application, the drawings required in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative labor.

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

[0046] Figure 2 is a flow diagram of a target fuel cell first voltage change amount determination method provided by an embodiment of the present application;

[0047] Figure 3 is a flow diagram of a target fuel cell single voltage change amount determination method provided by an embodiment of the present application;

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

[0049] Figure 5 is a flow diagram of a target fuel cell to be tested state determination method provided by an embodiment of the present application;

[0050] Figure 6This is a schematic diagram of the structure of a fuel cell life prediction device provided in an embodiment of this application. Detailed Implementation

[0051] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0052] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such information can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or server that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0053] In existing technologies, fuel cell lifespan prediction mainly involves acquiring relevant data to build a training dataset, thereby obtaining a prediction model, and then using this model to predict the fuel cell's lifespan. However, the training process for building this prediction model is lengthy and requires a large amount of training data, which affects the efficiency of lifespan prediction.

[0054] Please see Figure 1 The diagram illustrates a flowchart of a fuel cell life prediction method provided in this application. This specification provides the operational steps of the method described in the embodiments or flowchart. The order of steps listed in the embodiments is merely one possible execution order among many steps and does not represent the only possible execution order. The fuel cell life prediction method can be executed according to the order shown in the embodiments or drawings. Specifically, as shown... Figure 1 As shown, the method may include the following steps:

[0055] S101: If 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 the first voltage change of the target fuel cell in the current test cycle.

[0056] In this embodiment, the target fuel cell can be a proton exchange membrane fuel cell, and the length of the current test period is a preset length, for example, the current test period can be 5 minutes, or 10 minutes. The actual usage of the target fuel cell in the current test period can be obtained by collecting the sensor in the test bench; the preset usage range is preset in advance, which is used to compare with the actual usage to determine the subsequent operation. For example, the preset usage range can be [90%, 100%]. The specific execution process of this embodiment can be: first, connect the target fuel cell with the test bench, and then collect the actual usage of the target fuel cell in the current test period through the sensor in the test bench; compare the actual usage with the preset usage range, and if the actual usage of the target fuel cell in the current test period does not reach the preset usage range, perform voltage test on the target fuel cell in the current test period, so as to determine the first voltage change of the target fuel cell in the current test period.

[0057] In some example embodiments, referring to Figure 2 , which is a flowchart of a target fuel cell first voltage change determination method provided by an embodiment of the application. As shown in Figure 2 , the voltage test on the target fuel cell in the current test period to determine the first voltage change of the target fuel cell in the current test period includes:

[0058] S201: divide the current test period into a plurality of second test periods averagely;

[0059] Specifically, the number of second test periods is determined in advance according to actual conditions. For example, in the case of a test duration of 5 minutes for the current test period, and the number of second test periods is set to 10, then the test duration of each second test period is 30 seconds; in the case of a test duration of 5 minutes for the current test period, and the number of second test periods is set to 5, then the test duration of each second test period is 1 minute. It should be noted that the specific number of second test periods is not limited here.

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

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

[0062] S205: determining a first voltage variation of the target fuel cell in the current test period based on the single voltage variation.

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

[0064] By dividing the current test period into multiple second test periods, and performing voltage testing on the target fuel cell in each second test period to obtain the single voltage variation corresponding to each second test period, and calculating the average of the multiple single voltage variations to obtain the first voltage variation, the problem of inaccurate voltage testing caused by voltage jump and other extreme factors can be excluded, thereby reducing the voltage testing error and further improving the accuracy of the determination of the first voltage variation.

[0065] In some example embodiments, the determination of the first voltage variation of the target fuel cell in the current test period based on the single voltage variation comprises:

[0066] determining the average voltage variation of the single voltage variation corresponding to each second test period;

[0067] determining the average voltage variation as the first voltage variation of the target fuel cell in the current test period.

[0068] In the above example embodiments, specifically, the first voltage variation = the sum of the single voltage variation corresponding to each second test period / the number of second test periods, i.e., the average voltage variation of the multiple single voltage variations is calculated to obtain the first voltage variation corresponding to the entire current test period. For example, in the case where the number of second test periods is 5, the voltage variation corresponding to each second test period is 10.27, 10.35, 10.38, 10.54, and 10.62, respectively, then the first voltage variation = the average voltage variation = (10.27+10.35+10.38+10.54+10.62) / 5 = 10.43.

[0069] By averaging the multiple single voltage variations to obtain the average voltage variation, and determining the average voltage variation as the first voltage variation, the problem of inaccurate voltage testing caused by voltage jump and other extreme factors can be excluded, thereby reducing the voltage testing error and further improving the accuracy of the determination of the first voltage variation.

[0070] In some example embodiments, please refer to Figure 3 which is a flowchart of a method for determining the single voltage variation of a target fuel cell. Specifically, as shown inFigure 3 As shown, the voltage test on the target fuel cell in each of the second test periods determines the single voltage variation amount of the target fuel cell in each of the second test periods, which comprises:

[0071] S301: Obtain the first current density corresponding to the starting moment of each of the second test periods of the target fuel cell and the first stable voltage value corresponding to the first current density;

[0072] Specifically, refer to Figure 4 , which is a schematic diagram of the principle of the single voltage variation amount determination method of the target fuel cell. As shown in Figure 4 , the voltage value changes with the change of the current density. Among them, point a represents the first stable voltage value corresponding to the starting moment of the second test period, which is determined according to the first current density of the target fuel cell in the stable state.

[0073] S303: At the starting moment of each of the second test periods, adjust the first current density to the second current density, and obtain the voltage change curve and the voltage change straight line of the target fuel cell;

[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 line between the first voltage point and the second voltage point; the first voltage point is the point of the first straight line corresponding to the first stable voltage value at the starting moment of the second test period; the second voltage point is the point of the second straight line corresponding to the second stable voltage value at the starting moment of changing to the second stable voltage value;

[0075] Specifically, the point of the first straight line corresponding to the first stable voltage value at the starting moment of the second test period is point a in Figure 4 , the first current density is adjusted to the second current density, the voltage is constantly changing, and then stabilizes at the second stable voltage value, and the point of the second straight line corresponding to the second stable voltage value at the starting moment of changing to the second stable voltage value is point b in Figure 4 . The voltage change process is determined as the voltage change curve, that is, curve ① in Figure 4 , and the voltage change straight line is obtained by connecting points a and b, that is, curve ② in Figure 4 .

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

[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 amount of the target fuel cell in each second test period, i.e., the area of the shaded part is the single voltage change amount.

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

[0079] Another method for determining the single voltage change amount can also be to directly determine the voltage attenuation degree 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 degree is (0.7-0.68) / 0.7=2.86%.

[0080] In some example embodiments, please refer to Figure 5 which shows a flowchart of a method for determining the state of a target fuel cell to be tested. Specifically, as shown in Figure 5 before the method of determining the first voltage change amount of the target fuel cell in the current test period under the condition that the actual usage amount of the target fuel cell in the current test period does not reach the preset usage range, the method further comprises:

[0081] S501: activating the target fuel cell;

[0082] Specifically, the method of activating the target fuel cell can 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 treatment on the activated target fuel cell to obtain a polarization result;

[0084] Specifically, after performing the activation process on the target fuel cell to activate the target fuel cell, the polarization treatment is performed on the target fuel cell to obtain a polarization result; the polarization result is used to judge whether the target fuel cell has a polarization state.

[0085] S505: performing polarization elimination operation on the target fuel cell in the case that the polarization result represents that the target fuel cell has a polarization state.

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

[0087] By activating the target fuel cell and performing a depolarization operation on the target fuel cell when the target fuel cell exists in a polarization state before the voltage test on the target fuel cell is performed again, other factors before the test work are excluded, the preparation work is done, the target fuel cell is ensured to be in a normal state for testing, and the accuracy of the subsequent life prediction method is further ensured.

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

[0089] In this embodiment, specifically, the battery voltage corresponding to the start time of the current test period and the first voltage change amount obtained after the voltage test are obtained, and the battery voltage corresponding to the start time of the next test period is determined. That is, the battery voltage corresponding to the start time of the next test period can be understood as the battery voltage corresponding to the start time of the current test period changing by the first voltage change amount, which is the battery voltage corresponding to the end time of the current test period. Or it can be understood that the battery voltage corresponding to the start time of the next test period is the battery voltage corresponding to the end time of the previous adjacent test period. It should be noted that the test time interval between two test periods can be fixed or adjustable, and is determined according to the actual situation, which is not limited here.

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

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

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

[0093] In this embodiment, specifically, in the case where the actual usage amount of the target fuel cell corresponding to the current test period does not reach the preset usage range, the voltage test operation is repeatedly performed on the target fuel cell to obtain a plurality of first voltage variation amounts until the actual usage amount of the target fuel cell corresponding to the current test period reaches the preset usage range.

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

[0095] In this embodiment, specifically, in the case where the actual usage amount of the target fuel cell corresponding to the current test period reaches the preset usage range, the voltage test is performed again on the target fuel cell to determine a second voltage variation amount of the target fuel cell in the current test period. The determination method of the second voltage variation amount is consistent with the determination method of the first voltage variation amount, and the determination method of the first voltage variation amount has been described in detail in the previous embodiments, which will not be described in detail here.

[0096] S111: determining a target correspondence relationship between the actual usage amount and the battery voltage of the target fuel cell based on the actual usage amount of the target fuel cell corresponding to each current test period and the battery voltage corresponding to the start time of each current test period; the target correspondence relationship is used for life prediction of a fuel cell to be predicted.

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

[0098] In some example embodiments, the determination of the target correspondence relationship between the actual usage amount and the battery voltage of the target fuel cell based on the actual usage amount of the target fuel cell corresponding to each current test period and the battery voltage corresponding to the start time of each current test period includes:

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

[0100] determining the linear fitting result as the target correspondence relationship between the actual usage amount and the battery voltage of the target fuel cell.

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

[0102] By linear fitting the actual usage of the target fuel cell at each current test period and the battery voltage at the start time of each current test period, a target corresponding relationship between the actual usage and the battery voltage of the target fuel cell is constructed, and the life prediction of the fuel cell to be predicted can be realized only by 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 remaining voltage of the fuel cell to be predicted;

[0105] determining the remaining usage of the fuel cell to be predicted corresponding to the remaining voltage based on the target corresponding relationship and the remaining voltage.

[0106] In the above exemplary embodiments, specifically, when the life prediction of the fuel cell to be predicted is to be performed, the remaining voltage of the fuel cell to be predicted is acquired first, and the remaining voltage can be the battery voltage value corresponding to the fuel cell to be predicted at the current time, and then the battery voltage value is taken as the input of the linear fitting function F(x) to obtain the actual usage of the fuel cell to be predicted at the current time, 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 taken as the input of the linear fitting function F(x) to obtain the actual usage F(0.55) = 46.53% of the fuel cell to be predicted at the current time, and the remaining usage of the fuel cell to be predicted is 100%-46.53% = 53.47%.

[0107] By acquiring the remaining voltage of the fuel cell to be predicted and taking the remaining voltage value as the input of the target corresponding relationship, the actual usage of the fuel to be predicted is outputted, and the remaining usage of the fuel cell to be predicted is determined by the actual usage, and the life prediction of the fuel cell to be predicted can be realized only by the target corresponding relationship, thereby improving the prediction efficiency and convenience of life prediction.

[0108] The embodiments of the present application also provide a fuel cell life prediction device, please refer to Figure 6As shown in the structural schematic diagram of a fuel cell life prediction device provided by the embodiment of the application, specifically Figure 6 As shown in the structural schematic diagram of a fuel cell life prediction device provided by the embodiment of the application, specifically

[0109] The first voltage test module 601 is configured to perform voltage test on the target fuel cell in a current test period when the actual usage amount of the target fuel cell corresponding to the current test period does not reach the preset usage range, and determine a first voltage variation amount of the target fuel cell in the current test period.

[0110] The battery voltage determination module 603 is configured to determine a battery voltage corresponding to a start time of a next test period based on the battery voltage corresponding to the start time of the current test period and the first voltage variation amount.

[0111] The current test period determination module 605 is configured to determine the next test period as the current test period.

[0112] The repeated execution module 607 is configured to repeatedly perform the following operations: performing voltage test on the target fuel cell in a current test period when the actual usage amount of the target fuel cell corresponding to the current test period does not reach the preset usage range, and determining a first voltage variation amount of the target fuel cell in the current test period; determining a battery voltage corresponding to a start time of a next test period based on the battery voltage corresponding to the start time of the current test period and the first voltage variation amount; and determining the next test period as the current test period, until the actual usage amount of the target fuel cell corresponding to the current test period reaches the preset usage range.

[0113] The second voltage test module 609 is configured to perform voltage test on the target fuel cell, and determine a second voltage variation amount of the target fuel cell in the current test period.

[0114] The target corresponding relationship determination module 611 is configured to determine a target corresponding relationship between the actual usage amount and the battery voltage of the target fuel cell based on the actual usage amount of the target fuel cell corresponding to each current test period and the battery voltage corresponding to the start time of each current test period, and the target corresponding relationship is used for life prediction of a fuel cell to be predicted.

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

[0116] The second test period determination module is configured to divide the current test period into a plurality of second test periods.

[0117] The single voltage change amount first determination module is configured to determine a single voltage change amount of the target fuel cell in each of the second test periods by performing a voltage test on the target fuel cell in each of the second test periods.

[0118] The first voltage change amount first determination module is configured to determine a first voltage change amount of the target fuel cell in the current test period based on the single voltage change amount.

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

[0120] The average voltage change amount determination module is configured to determine an average voltage change amount of the single voltage change amounts corresponding to the plurality of second test periods.

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

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

[0123] The voltage and current data acquisition module is configured to acquire a first current density corresponding to a starting moment of each of the second test periods and a first stable voltage value corresponding to the first current density.

[0124] The voltage change graph acquisition module is configured to adjust the first current density to a second current density at the starting moment of each of the second test periods, 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 a voltage change process of the target fuel cell from the first stable voltage value to a 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 of a first straight line corresponding to the first stable voltage value at the starting moment of the second test period; the second voltage point is a point of a second straight line corresponding to the second stable voltage value at a starting moment of changing to the second stable voltage value.

[0125] The single voltage change amount second determination module is configured to determine an area of a closed region formed by the voltage change curve and the voltage change straight line as the single voltage change amount of the target fuel cell in each of the second test periods.

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

[0127] a linear fitting result determination module, configured to perform linear fitting on the actual usage of the target fuel cell in each current test period and the battery voltage at the start time of each current test period to obtain a linear fitting result;

[0128] a target corresponding relationship determination sub-module, configured to determine the linear fitting result as a target corresponding relationship between the actual usage and the battery voltage of the target fuel cell.

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

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

[0131] a residual usage determination module, configured to determine, based on the target corresponding relationship and the residual voltage, a residual usage of the fuel cell to be predicted corresponding to the residual voltage.

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

[0133] an activation module, configured to activate the target fuel cell;

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

[0135] a polarization elimination module, configured to perform polarization elimination operation on the target fuel cell in a case where the polarization result indicates that the target fuel cell has a polarization state.

[0136] As to the device in the above embodiments, the specific manners in which various modules perform operations have been described in detail in the embodiments of the method, and thus will not be described in detail here.

[0137] Embodiments of the present application further provide a fuel cell life prediction electronic device, which comprises a processor and a memory, the memory storing at least one instruction or at least one program, the at least one instruction or the at least one program being loaded and executed by the processor to implement the fuel cell life prediction method according to the above method embodiments.

[0138] Embodiments of the present application further provide a computer readable storage medium storing computer executable instructions, the computer executable instructions being executed by a processor to implement the fuel cell life prediction method according to the embodiments of the present application.

[0139] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant 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, the processes of the above-mentioned embodiments of each method can be included. Any reference to memory, storage, databases, or other media in each embodiment provided by the present application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synch link) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus 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 recited 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 implemented in the specific order shown or in a continuous sequence to achieve the desired results. In some embodiments, multi-task processing and parallel processing are possible or can be advantageous.

[0141] Each embodiment in the present application is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other. Each embodiment focuses on the difference from other embodiments. In particular, for electronic device, 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 part of the method embodiment.

[0142] The electronic device, computer readable storage medium and method provided by the embodiments of the present application are corresponding, and therefore the electronic device, computer readable storage medium also has similar beneficial technical effects as the corresponding method. Since the beneficial technical effects of the method have been described in detail above, the beneficial technical effects of the corresponding electronic device, computer readable storage medium will not be described here.

[0143] The above merely provides an example of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application should be included in the scope of claims of the present application.

Claims

1. A method of predicting the lifetime of a fuel cell, characterized by, The method comprises the following steps: In the case that the actual usage of the target fuel cell corresponding to the current test period does not reach the preset usage range, the current test period is evenly divided into a plurality of second test periods; Obtain the first current density of the target fuel cell at the start time of each second test period and the first stable voltage value corresponding to the first current density; At the start time of each second test period, the first current density is adjusted to a second current density, and the voltage change curve and the voltage change straight line of the target fuel cell are obtained; The area of the closed region formed by the voltage change curve and the voltage change straight line is determined as the single voltage change amount of the target fuel cell in each second test period; Based on the single voltage change amount, the first voltage change amount of the target fuel cell in the current test period is determined; Based on the battery voltage corresponding to the start time of the current test period and the first voltage change amount, the battery voltage corresponding to the start time of the next test period is determined; The next test period is determined as the current test period; Repeat the steps of: in the case that the actual usage of the target fuel cell corresponding to the current test period does not reach the preset usage range, the current test period is evenly divided into a plurality of second test periods to the step of determining the next test period as the current test period; Until the actual usage of the target fuel cell corresponding to the current test period reaches the preset usage range; Perform voltage test on the target fuel cell to determine the second voltage change amount of the target fuel cell in the current test period; Based on the actual usage of the target fuel cell corresponding to each current test period and the battery voltage corresponding to the start time of each current test period, a target correspondence relationship between the actual usage and the battery voltage of the target fuel cell is determined; the target correspondence relationship is used for life prediction of a fuel cell to be predicted.

2. The method of claim 1, wherein, The method comprises the following steps: Determine the average voltage change amount of the single voltage change amount corresponding to the plurality of second test periods respectively; The average voltage change amount is determined as the first voltage change amount of the target fuel cell in the current test period.

3. The method of claim 1, wherein, 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 line between the first voltage point and the second voltage point; the first voltage point is the point of the first straight line corresponding to the first stable voltage value at the start time of the second test period; the second voltage point is the point of the second straight line corresponding to the second stable voltage value at the start time of changing to the second stable voltage value.

4. The method of claim 1, wherein, The step of determining 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 in each current test cycle and the battery voltage at the start of each current test cycle includes: The actual usage of the target fuel cell in each current test cycle and the battery voltage at the start of each current test cycle are linearly fitted to obtain the linear fitting result. The linear fitting result is determined as the target correspondence between the actual usage of the target fuel cell and the battery voltage.

5. The method of claim 1, wherein, The method includes: Obtain the remaining voltage of the fuel cell to be predicted; Based on the target correspondence and the remaining voltage, the remaining usage of the fuel cell to be predicted corresponding to the remaining voltage is determined.

6. The method of claim 1, wherein, Before determining the first voltage change of the target fuel cell within the current test cycle, when the actual usage of the target fuel cell in the current test cycle does not reach the preset usage range, the method further includes: Activate the target fuel cell; The activated target fuel cell is subjected to polarization treatment to obtain polarization results; If 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.

7. A fuel cell life prediction device characterized by comprising: The fuel cell lifetime prediction device includes: The second test cycle determination module is used to divide the current test cycle into multiple second test cycles if the actual usage of the target fuel cell in the current test cycle does not reach the preset usage range. The voltage and current data acquisition module is used to acquire the first current density and the first stable voltage value corresponding to the first current density at the beginning of each second test cycle of the target fuel cell; The voltage change graph acquisition module is used to adjust the first current density to the second current density at the beginning of each second test cycle, and acquire the voltage change curve and voltage change line of the target fuel cell. The second module for determining the single voltage change is used to determine 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 each second test cycle. The first voltage change determination module is used to determine the first voltage change of the target fuel cell in the current test cycle based on the single voltage change. The battery voltage determination module is used to determine the battery voltage at the start time of the next test cycle based on the battery voltage at the start time of the current test cycle and the first voltage change. The current test cycle determination module is used to determine the next test cycle as the current test cycle; The repeating execution module is configured to repeatedly execute the steps of: dividing the current test period into a plurality of second test periods if the actual usage amount of the target fuel cell corresponding to the current test period does not reach the preset usage range, to the step of determining the next test period as the current test period, until the actual usage amount of the target fuel cell corresponding to the current test period reaches the preset usage range. The second voltage test module is configured to perform a voltage test on the target fuel cell to determine a second voltage variation amount of the target fuel cell in the current test period. The target corresponding relationship determination module is configured to determine a target corresponding relationship between the actual usage amount and the battery voltage of the target fuel cell based on the actual usage amount of the target fuel cell corresponding to each current test period and the battery voltage corresponding to the start time of each current test period, and the target corresponding relationship is used for life prediction of a fuel cell to be predicted.

8. An electronic device, comprising: The electronic device comprises a processor and a memory, and the memory stores at least one instruction or at least one program, and the at least one instruction or the at least one program is loaded and executed by the processor to implement the fuel cell life prediction method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer executable instructions, and the computer executable instructions are executed by the processor to implement the fuel cell life prediction method according to any one of claims 1 to 6.

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