Control method and control device for output power of fuel cell and vehicle

Abstract

The invention provides a control method and device for output power of a fuel cell and a vehicle, belongs to the technical field of automobiles, and aims at reducing the temperature rise speed of a power battery. The control method comprises the steps that in response to the situation that the temperature of the power battery is larger than a preset temperature, multiple first historical working powers of a driving motor before the current moment are obtained, and the first output power of the fuel cell at the current moment; determining a predicted working power required by the driving motor at a next moment after the current moment based on the plurality of first historical working powers; determining the offset of the predicted working power relative to the first output power; determining a second output power of the fuel cell at the next moment based on the offset to reduce a difference between the second output power and the predicted operating power; and when the next moment arrives, the fuel cell is controlled to output according to second output power, and the second output power is used for being output to the driving motor or distributed to the driving motor and the power cell.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and particularly relates to a method and device for controlling the output power of a fuel cell and a vehicle. Background Art

[0002] Currently, for hybrid electric vehicles, a power battery and a fuel cell are usually matched to provide power for the vehicle. Among them, the fuel cell can also charge the power battery.

[0003] However, in the related art, the power output by the fuel cell is relatively fixed, and the power battery cannot always be in a suitable working state, resulting in a situation where it discharges or charges at a relatively large power for a long time, causing the temperature rise rate of the power battery to become faster, leading to a relatively high temperature of the power battery, and even seriously affecting the driving of the whole vehicle in severe cases. Summary of the Invention

[0004] In view of this, the present invention aims to provide a method and device for controlling the output power of a fuel cell and a vehicle to reduce the temperature rise rate of the power battery.

[0005] To achieve the above object, the technical solution of the present invention is realized as follows:

[0006] A method for controlling the output power of a fuel cell, which is applied to a vehicle. The vehicle includes a power battery, a fuel cell, and a drive motor. The control method includes:

[0007] In response to the temperature of the power battery being greater than a preset temperature, obtain a plurality of first historical working powers of the drive motor before the current moment, and the first output power of the fuel cell at the current moment;

[0008] Based on the plurality of first historical working powers, determine the predicted working power required by the drive motor at the next moment after the current moment; and determine the offset of the predicted working power relative to the first output power;

[0009] Based on the offset, determine the second output power of the fuel cell at the next moment to reduce the difference between the second output power and the predicted working power;

[0010] When the next moment arrives, control the fuel cell to output according to the second output power, where the second output power is used to output to the drive motor or is allocated to the drive motor and the power battery.

[0011] Further, the step of determining the predicted working power required by the drive motor at the next moment after the current moment based on the plurality of first historical working powers includes:

[0012] Perform a preset operation on multiple of the first historical working powers to obtain the predicted working power; or,

[0013] Input multiple of the first historical working powers into a target neural network model, and use the working power output by the target neural network model as the predicted working power;

[0014] Wherein, the target neural network model is obtained by training a preset network with multiple actual working power samples of the drive motor as training samples.

[0015] Further, determining the second output power of the fuel cell at the next moment based on the offset includes:

[0016] Determine the offset value and offset direction corresponding to the offset, wherein the offset direction indicates whether the predicted working power is greater than the first output power;

[0017] Based on the offset value and the offset direction, determine the power adjustment value for the first output power;

[0018] Adjust the first output power according to the power adjustment value to obtain the second output power.

[0019] Further, characterized in that the power adjustment value includes a power increase value, and determining the adjusted power value for the first output power based on the offset value and the offset direction includes:

[0020] In the case where the offset direction indicates that the predicted working power is greater than the first output power and the offset value is greater than a first preset value, determine the power increase value based on the offset value;

[0021] Adjusting the first output power according to the power adjustment value to obtain the second output power includes;

[0022] Increase the first output power according to the power increase value to obtain the second output power.

[0023] Further, the power adjustment value includes a power decrease value, and determining the adjusted power value for the first output power based on the offset value and the offset direction includes:

[0024] In the case where the offset direction indicates that the predicted working power is less than the first output power and the offset value is greater than a second preset value, determine the power decrease value based on the offset value;

[0025] Adjust the first output power according to the power adjustment value to obtain the second output power, including;

[0026] Reduce the first output power according to the power reduction value to obtain the second output power.

[0027] Further, before obtaining a plurality of first historical operating powers of the drive motor before the current moment in response to the temperature of the power battery being greater than a preset temperature, the control method further includes:

[0028] In response to the SOC value of the power battery being lower than a preset SOC threshold, control the fuel cell to output power to the drive motor and / or control the fuel cell to output power to the power battery;

[0029] After controlling the fuel cell to output power according to the second output power, the control method further includes:

[0030] When controlling the fuel cell to output power to the drive motor, if the second output power is higher than the first output power, reduce the power output from the power battery to the drive motor;

[0031] When controlling the fuel cell to output power to the drive motor and the power battery, if the second output power is lower than the first output power, reduce the power output from the fuel cell to the power battery.

[0032] Compared with the prior art, the control method for the output power of a fuel cell according to the present invention has the following advantages:

[0033] Thus, according to the present invention, when the temperature of the power battery is greater than the preset temperature, a plurality of first historical operating powers of the drive motor before the current moment and the first output power of the fuel cell at the current moment are obtained. Thereby, the predicted operating power required by the drive motor at the next moment after the current moment can be determined according to the plurality of first historical operating powers, and the offset of the predicted operating power relative to the first output power can be determined. Through the offset, it can be determined whether the predicted operating power is greater than or less than the first output power, and the second output power of the fuel cell at the next moment can be determined, so as to reduce the difference between the second output power and the predicted operating power.

[0034] Among them, since the second output power is used to output to the drive motor or is distributed to the drive motor and the power battery; and since the second output power of the fuel cell at the next moment is determined based on the offset between the predicted working power and the first output power of the fuel cell at the current moment, the offset between the determined second output power and the predicted working power is reduced compared to the offset between the predicted working power and the first output power. That is to say, the second output power of the fuel cell is matched with the predicted working power, that is, the second output power of the fuel cell can just meet the predicted working power of the drive battery. In this case, the power output of the power battery to the drive battery can be reduced, or the power output of the fuel cell to the power battery can be reduced, thereby reducing the discharge power or charging power of the power battery, and further reducing the temperature rise rate of the power battery, ensuring that the temperature of the power battery will not be too high to affect charging and discharging.

[0035] Another object of the present invention is to provide a control device to reduce the temperature rise rate of the power battery.

[0036] To achieve the above object, the technical solution of the present invention is realized as follows:

[0037] A control device for the output power of a fuel cell, which is applied to a vehicle. The vehicle includes a power battery, a fuel cell, and a drive motor. The control device includes:

[0038] An acquisition unit, configured to, in response to the temperature of the power battery being greater than a preset temperature, acquire a plurality of first historical working powers of the drive motor before the current moment, and the first output power of the fuel cell at the current moment;

[0039] A first determination unit, configured to determine the predicted working power required by the drive motor at the next moment after the current moment based on the plurality of first historical working powers; and determine the offset of the predicted working power relative to the first output power;

[0040] A second determination unit, configured to determine the second output power of the fuel cell at the next moment based on the offset to reduce the difference between the second output power and the predicted working power;

[0041] A control unit, configured to control the fuel cell to output according to the second output power when the next moment arrives, where the second output power is used to output to the drive motor or is distributed to the drive motor and the power battery.

[0042] The advantages of the control device compared with the prior art are the same as those of the above control method, and will not be elaborated here.

[0043] Another object of the present invention is to provide an electronic device to reduce the temperature rise rate of the power battery.

[0044] To achieve the above object, the technical solution of the present invention is realized as follows:

[0045] An electronic device includes a memory, a processor, and a computer program stored on the memory and executable on the processor. The processor is configured to execute a control method for the output power of a fuel cell as described above.

[0046] The electronic device has the same advantages as the above control method over the prior art, which will not be elaborated here.

[0047] Another object of the present invention is to provide a vehicle to reduce the temperature rise rate of the power battery.

[0048] To achieve the above object, the technical solution of the present invention is realized as follows:

[0049] A vehicle includes a control module configured to implement a control method for the output power of a fuel cell as described above.

[0050] The vehicle has the same advantages as the above control method over the prior art, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0052] Figure 1 It is a schematic layout diagram of a fuel cell, a power battery, and a drive motor on a high-voltage bus;

[0053] Figure 2 It is a step flow chart of a control method for the output power of a fuel cell according to an embodiment of the present invention;

[0054] Figure 3 It is a schematic control flow diagram for the output power of a fuel cell according to an embodiment of the present invention;

[0055] Figure 4 It is a module diagram of a control device for the output power of a fuel cell according to an embodiment of the present invention.

[0056] REFERENCE SIGNS:

[0057] 101, acquisition unit; 102, first determination unit; 103, second determination unit; 104, control unit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0058] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0059] The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0060] In the related art, the general power matching of hybrid vehicles mainly includes components such as fuel cells, power batteries, drive motors, and gearboxes. Among them, the energy generated by the drive motor is used to drive the vehicle to travel.

[0061] When performing power matching, referring to Figure 1 , Figure 1 shows a schematic layout diagram of a fuel cell, a power battery, and a drive motor on a high-voltage bus. As Figure 1 shown, the power battery outputs the positive and negative poles of the high-voltage bus, and the drive motor and the fuel cell are simultaneously connected to the high-voltage bus. In this way, the VCU (Vehicle Control Unit) can request the fuel cell to output a certain power according to the SOC range of the power battery, and supply it to the power battery or the drive motor. This results in the following two situations when the drive motor drives the vehicle: 1) The output power of the fuel cell ≤ the working power required by the drive motor. At this time, the energy flow of the whole vehicle is that the fuel cell and the power battery simultaneously supply energy to the drive motor, that is, the fuel cell and the power battery simultaneously output power to the drive motor; 2) The output power of the fuel cell > the working power required by the drive motor. At this time, the energy flow of the whole vehicle is that part of the energy generated by the fuel cell is supplied to the drive motor to drive the vehicle, and part of it flows to the power battery for storage, that is, the fuel cell outputs power to the drive motor and the power battery.

[0062] Among them, since the power of the fuel cell cannot be switched frequently and can only work at several fixed powers. Therefore, when the VCU requests the fuel cell to output power, usually when the SOC of the power battery is relatively high, a relatively small power is requested from the fuel cell; when the SOC of the power battery is relatively low, a relatively large power is requested from the fuel cell.

[0063] Among them, when the fuel cell outputs a relatively small power, in order to meet the power required by the vehicle, the power battery will output a relatively large power. However, since the power battery is relatively small, when the power battery outputs a relatively large power, the temperature rise rate of the power battery will be relatively fast. When the temperature of the power battery rises to a certain temperature, the output power of the power battery will be limited, and in severe cases, it will be unable to charge and discharge, resulting in the vehicle being unable to travel.

[0064] When the fuel cell outputs a large amount of power, since the energy consumption of the whole vehicle is not considered, there is a situation where the required power of the whole vehicle is small, that is, the working power required by the drive motor is small. In this case, part of the energy generated by the fuel cell flows into the drive motor, and the remaining flows into the power battery to charge the power battery, resulting in secondary conversion of energy and reducing the energy conversion efficiency of the vehicle.

[0065] In view of this, an embodiment of the present invention provides a method for controlling the output power of a fuel cell, which is applied to a vehicle. The vehicle includes a power battery, a fuel cell, and a drive motor. This control method can specifically refer to Figure 2 , Figure 2 which shows the step flowchart of a method for controlling the output power of a fuel cell according to an embodiment of the present invention. As Figure 2 shown, this control method includes the following steps:

[0066] Step S101, in response to the temperature of the power battery being greater than a preset temperature, obtain a plurality of first historical working powers of the drive motor before the current moment, and the first output power of the fuel cell at the current moment.

[0067] In actual situations, most power batteries are lithium batteries. The operating temperature of lithium batteries is -20°C to 60°C. However, when the temperature is relatively high, such as greater than 40°C, the performance of lithium batteries will decline, especially the charge and discharge capabilities, thus affecting the power output of lithium batteries.

[0068] Therefore, in order to prevent the temperature of the power battery from being too high, which may ultimately lead to the inability to charge and discharge and thus affect the driving of the vehicle, an embodiment of the present invention monitors the temperature of the power battery in real time through the VCU. When its temperature is greater than the preset temperature, the output power of the fuel cell is adjusted so that the fuel cell outputs according to the adjusted output power, thereby reducing the charging power or discharging power of the power battery, reducing the temperature rise rate of the power battery, and thus preventing the temperature of the power battery from being too high. Among them, since the charging power of the power battery is reduced, it means that the energy flowing from the fuel cell into the power battery is reduced, and the secondary conversion of the generated energy is reduced, which helps to improve the energy conversion efficiency of the vehicle.

[0069] Among them, the preset temperature can be determined according to the type of power battery actually used. For example, if the power battery used is a lithium battery, the preset temperature can be 40°C.

[0070] Among them, in order to ensure that the output power of the fuel cell after adjustment can reduce the charging power or discharging power of the power battery, the embodiments of the present invention first obtain a plurality of first historical working powers of the drive motor before the current moment, and the first output power of the fuel cell at the current moment. That is, after determining that the temperature of the power battery is greater than the preset temperature, first obtain a plurality of first historical working powers of the drive motor and the first output power of the fuel cell.

[0071] Among them, for the acquisition of the plurality of first historical working powers, the VCU can monitor the working power of the drive motor in real time and store the monitored working power in a preset database. After that, when the VCU monitors that the temperature of the power battery is greater than the preset temperature, it can obtain a plurality of working powers of the drive motor before the current moment from the preset database, that is, a plurality of first historical working powers.

[0072] Among them, for the first output power of the fuel cell at the current moment, it can also be obtained by the VCU. Specifically, after the VCU requests to control the fuel cell to output power at a certain power each time, the VCU can record the power output by the fuel cell and record it in another database. In this way, when the VCU monitors that the temperature of the power battery is greater than the preset temperature, it can find the most recent record from this database and obtain the power output by the fuel cell in this record. This power is the first output power of the fuel cell at the current moment.

[0073] Step S102, based on the plurality of first historical working powers, determine the predicted working power required by the drive motor at the next moment after the current moment; and determine the offset of the predicted working power relative to the first output power.

[0074] The plurality of first historical working powers can reflect the driving data of the vehicle in history, and this driving data can characterize the power demand of the vehicle during a past period of time. Thus, based on this, the power demand of the vehicle during a future period of time can be predicted. Therefore, after obtaining a plurality of first historical working powers of the drive motor before the current moment, the working power required by the drive motor at the next moment after the current moment can be predicted according to these first historical working powers. The predicted working power obtained by prediction is the predicted working power required by the drive motor at the next moment, and this predicted working power characterizes the power demand of the vehicle at the next moment.

[0075] Among them, the method for predicting the predicted working power required by the drive motor at the next moment can be, after obtaining a plurality of first historical working powers, obtaining the average value, median value or mode value, etc. of the plurality of first historical working powers, and determining the obtained average value, median value or mode value, etc. as the predicted working power.

[0076] In one example, the minimum or maximum value among multiple first historical working powers can also be determined as the predicted working power.

[0077] In another example, a large number of actual working powers of the drive motor can also be collected, and these actual working powers are used as training samples to be trained in a pre-trained neural network to obtain a neural network model. Thus, multiple first historical working powers can be input into the obtained neural network model. Then, the working power output by the neural network model is the predicted working power.

[0078] After determining the predicted working power, the offset of the predicted working power relative to the first output power can be further determined. Herein, the offset can refer to the difference between the predicted working power and the first output power, and this difference can reflect whether the predicted working power is greater than the first output power and the magnitude of the difference between the two.

[0079] Thus, in one example, the offset of the predicted working power relative to the first output power can be determined through the following steps:

[0080] Compare the predicted working power with the first output power. Specifically, a difference operation can be performed on the predicted working power and the first output power. For example, after determining the predicted working power, the first output power can be subtracted from the predicted working power, and the obtained value can be determined as the offset of the predicted working power relative to the first output power. Herein, if the obtained value is positive, it indicates that the predicted working power is greater than the first output power; if the obtained value is negative, it indicates that the predicted working power is less than the first output power. The absolute value of the obtained value can represent the magnitude of the difference between the predicted working power and the first output power.

[0081] Herein, the next moment can be the moment closest to the current moment after the current moment. For example, the time difference between the next moment and the current moment does not exceed 1S.

[0082] Step S103: Based on the offset, determine the second output power of the fuel cell at the next moment to reduce the difference between the second output power and the predicted working power.

[0083] Herein, the second output power is used to be output to the drive motor or distributed to the drive motor and the power battery.

[0084] As can be seen from the analysis in step S103 above, after determining the offset, it is possible to determine whether the predicted operating power is greater than the first output power. When the predicted operating power is greater than the first output power, if at the next moment the fuel cell still outputs at the first output power, then the power battery and the fuel cell need to output power to the drive motor together, resulting in an increase in the discharge power of the power battery at the next moment. This causes the temperature rise rate of the power battery to accelerate, and further leads to the temperature of the power battery being too high to perform charging and discharging.

[0085] Therefore, in order to avoid the occurrence of the above situation (the temperature of the power battery is too high to perform charging and discharging), the discharge power of the power battery can be reduced at the next moment, or even the power battery can be made not to discharge. Then, the second output power of the fuel cell at the next moment can be made larger than the first output power. In this way, the difference between the second output power and the predicted operating power will be reduced. Correspondingly, at the next moment, the power battery can reduce the power output to the drive motor, that is, reduce its discharge power, thereby reducing the temperature rise rate of the power battery.

[0086] When the predicted operating power is less than the first output power, if at the next moment the fuel cell still outputs at the first output power, then in addition to outputting power to the drive motor, the fuel cell will also output power to the power battery, that is, charge the power battery. This causes the charging power of the power battery to increase at the next moment, resulting in an acceleration of the temperature rise rate of the power battery, and further leading to the temperature of the power battery being too high to perform charging and discharging.

[0087] Therefore, in order to avoid the occurrence of the above situation (the temperature of the power battery is too high to perform charging and discharging), the charging power of the power battery can be reduced at the next moment, or even the power battery can be made not to charge. Then, the second output power of the fuel cell at the next moment can be made smaller than the first output power. In this way, the difference between the second output power and the predicted operating power will be reduced. Correspondingly, at the next moment, on the premise of meeting the operating power required by the drive motor, the power output by the fuel cell to the power battery can be reduced, that is, the charging power of the power battery can be reduced, thereby reducing the temperature rise rate of the power battery.

[0088] Therefore, after determining the offset, the first output power of the fuel cell at the current moment can be adjusted. For example, the first output power can be increased or decreased to obtain the second output power of the fuel cell at the next moment, so as to reduce the difference between the second output power and the predicted operating power, and further reduce the charging power or discharge power of the power battery at the next moment.

[0089] In addition, through the offset, it can be known that the predicted operating power is greater than the first output power, or the predicted operating power is less than the first output power. There may also be a situation where the difference between the predicted operating power and the first output power is zero, that is, the predicted operating power is the same as the first output power. In this case, the first output power of the fuel cell at the current moment may not be adjusted. That is to say, at the next moment, the fuel cell can continue to output according to the first output power. That is, the second output power can be the first output power. In this way, at the next moment, neither does the power battery need to output power to the drive motor, nor does the fuel cell have extra power to output to the power battery, thereby stopping the charge and discharge of the power battery, greatly reducing its temperature rise rate, and helping to reduce the temperature of the power battery.

[0090] Step S104, when the next moment arrives, control the fuel cell to output according to the second output power.

[0091] After determining that the output power of the fuel cell at the next moment is the second output power, when the next moment arrives, the fuel cell can be controlled to output according to the second output power.

[0092] In this way, whether the predicted operating power is greater than the first output power, the predicted operating power is less than the first output power, or the operating power is consistent with the first output power, the difference between the second output power and the predicted operating power can be reduced, or even there is no difference. Furthermore, the charging power or discharging power of the power battery at the next moment can be reduced, effectively reducing the temperature rise rate of the power battery, so as to ensure that the temperature of the power battery will not be too high, enabling the power battery to charge and discharge normally and ensuring that the vehicle can drive normally.

[0093] Among them, when it is determined that the predicted operating power is less than the first output power, if at the next moment, the fuel cell still outputs according to the first output power, since the fuel cell will still output power to the power battery, that is to say, a part of the energy generated by the fuel cell will flow to the power battery. That is, the chemical energy generated by the fuel cell will be converted into electrical energy and stored in the power battery. Subsequently, the electrical energy of the power battery will be converted into the kinetic energy required by the drive motor, resulting in secondary conversion of energy and reducing the energy conversion efficiency of the vehicle.

[0094] Therefore, in the embodiment of the present invention, at the next moment, since the fuel cell is controlled to output according to the second output power, the difference between the second output power and the predicted operating power is reduced. That is, under the condition of meeting the operating power required by the drive motor, the power output by the fuel cell to the power battery is reduced, and thus the energy flowing from the fuel cell to the power battery is reduced, so that secondary conversion of energy can be reduced and the energy conversion efficiency of the vehicle can be improved.

[0095] Accordingly, when the temperature of the power battery in the embodiment of the present invention is greater than the preset temperature, by obtaining a plurality of first historical working powers of the drive motor before the current moment and the first output power of the fuel cell at the current moment, and determining the predicted working power required by the drive motor at the next moment after the current moment according to the obtained plurality of first historical working powers, and at the same time determining the offset of the predicted working power relative to the first output power, wherein the offset between the determined second output power and the predicted power is reduced compared to the offset between the predicted power and the first output power, so that the second output power of the fuel cell matches the predicted working power, that is, the second output power of the fuel cell can just meet the predicted working power of the drive battery. In this case, the power output of the power battery to the drive battery can be reduced, thereby reducing the discharge temperature of the power battery.

[0096] Exemplarily, assuming that the predicted working power is greater than the first output power and the fuel cell still outputs power according to the first output power at the next moment, then the power battery and the fuel cell need to output power to the drive motor together, resulting in an increase in the discharge power of the power battery, which causes the temperature of the power battery to continue to rise. By adopting the technical solution of the present invention, when the next moment arrives, the fuel cell is controlled to output power according to the second output power, and the difference between the second output power and the predicted working power is reduced. Therefore, at the next moment, the power output from the power battery to the drive motor can be reduced, that is, the discharge power of the power battery is reduced, thereby reducing the temperature rise rate of the power battery.

[0097] In addition, since the offset between the second output power and the predicted power is reduced compared to the offset between the predicted power and the first output power, and the second output power of the fuel cell may be output to both the power battery and the drive battery at the same time. In this case, when the second output power matches the predicted working power, the power output to the power battery in the second output power is relatively reduced, thereby reducing the charging power of the power battery, thus reducing the temperature rise rate of the power battery and avoiding secondary energy conversion.

[0098] Exemplarily, assume that the predicted operating power is less than the first output power, and at the next moment, the fuel cell still outputs power according to the first output power. Then, in addition to outputting power to the drive motor, the fuel cell will also output power to the power battery, that is, charge the power battery, resulting in secondary conversion of energy. At the same time, due to charging the power battery, the charging power of the power battery increases, which causes the temperature of the power battery to continue to rise. By adopting the technical solution of the present invention, when the next moment arrives, the fuel cell is controlled to output power according to the second output power. Since the difference between the second output power and the predicted operating power is reduced, therefore, at the next moment, the power output by the fuel cell to the power battery can be reduced, that is, the charging power of the power battery is reduced, thereby reducing the temperature rise rate of the power battery. In addition, since the power output by the fuel cell to the power battery is reduced, the energy flowing from the fuel cell to the power battery is also reduced, thereby reducing the secondary conversion of energy and helping to improve the energy conversion efficiency of the vehicle.

[0099] Thus, by adjusting the output power of the fuel cell, the present invention can not only reduce the temperature rise rate of the power battery, ensure that the temperature of the power battery is not too high, enable the power battery to be normally charged and discharged, but also improve the energy conversion efficiency of the vehicle.

[0100] In an alternative embodiment, determining the second output power of the fuel cell at the next moment based on the offset includes:

[0101] Determine the offset value and offset direction corresponding to the offset, where the offset direction indicates whether the predicted operating power is greater than the first output power;

[0102] Based on the offset value and the offset direction, determine the power adjustment value for the first output power;

[0103] Adjust the first output power according to the power adjustment value to obtain the second output power.

[0104] After determining the offset of the predicted operating power relative to the first output power, the offset value and offset direction corresponding to the offset can be determined, and the power adjustment value for the first output power can be determined according to the offset value and offset direction.

[0105] Wherein, since the offset can refer to the difference between the predicted operating power and the first output power, therefore, the offset value corresponding to the offset can be the difference between the predicted operating power and the first output power. Correspondingly, the offset direction can indicate whether the predicted operating power is greater than the first output power.

[0106] Therefore, after determining the offset of the predicted operating power relative to the first output power, and determining the offset value and offset direction corresponding to the offset, the difference between the predicted operating power and the first output power can be obtained, and it can be determined whether the predicted operating power is greater than the first output power.

[0107] In an embodiment of the present invention, in order to reduce the discharge power or charging power of the power battery, and thus reduce the temperature rise rate of the power battery, it is necessary to reduce the difference between the second output power and the predicted power of the fuel cell at the next moment. Or rather, it is necessary to reduce the difference between the second output power and the predicted operating power compared to the difference between the predicted operating power and the first output power.

[0108] To achieve the above object, a preset value can be set. Based on the first output power, the second output power is obtained by increasing or decreasing the preset value, and this preset value is the power adjustment value. Among them, the power adjustment value includes the direction and the numerical value of the adjustment to the first output power. The adjustment direction includes the adjustment direction that increases the first output power, or the adjustment direction that decreases the first output power.

[0109] Thus, by adjusting the first output power, the first output power can be increased or decreased, so that the difference between the obtained second output power and the predicted power is reduced, thereby reducing the discharge power or charging power of the power battery.

[0110] Among them, if the offset value corresponding to the offset is zero, it means that the first output power of the fuel cell at the current moment is the same as the predicted operating power. Then, at the next moment, the fuel cell can continue to output according to the first output power. That is to say, the power adjustment value for the first output power can be zero. In this way, at the next moment, neither does the power battery need to output power to the drive motor, nor does the fuel cell have extra power to output to the power battery, thus stopping the charge and discharge of the power battery, greatly reducing its temperature rise rate, and helping to reduce the temperature of the power battery.

[0111] In an optional embodiment, the power adjustment value includes a power increase value. Determining the adjusted power value for the first output power based on the offset value and the offset direction includes:

[0112] In the case where the offset direction indicates that the predicted operating power is greater than the first output power, and the offset value is greater than a first preset value, the power increase value is determined based on the offset value;

[0113] Adjusting the first output power according to the power adjustment value to obtain the second output power includes;

[0114] Increase the first output power according to the power increase value to obtain the second output power.

[0115] When the offset direction corresponding to the offset indicates that the predicted working power is greater than the first output power, it means that at the next moment, if the fuel cell still outputs power according to the first output power, the power battery and the fuel cell need to output power to the drive motor together. Among them, if the offset value corresponding to the offset is large, it means that the power battery will output a large amount of power to the drive motor, that is, the discharge power of the power battery is large. In this way, the temperature rise speed of the power battery is accelerated, and there is a risk that the power battery cannot be charged and discharged due to too high temperature.

[0116] Based on this, in the embodiment of the present invention, when the offset direction indicates that the predicted working power is greater than the first output power and the offset value is greater than the first preset value, the first output power is adjusted to obtain the second output power. Among them, the first preset value can be set according to the actual capacity of the power battery. For a power battery with a larger capacity, the corresponding first preset value is also larger; on the contrary, for a power battery with a smaller capacity, the corresponding first preset value is also smaller.

[0117] Among them, in order to reduce the discharge power of the power battery, the embodiment of the present invention adjusts the first output power according to the power increase value and increases the first output power to the second output power. Among them, the power increase value indicates that when adjusting the first output power, the first output power is adjusted in the increasing direction. In this way, after the adjustment, the difference between the obtained second output power and the predicted working power can be reduced, thereby reducing the discharge power of the power battery and thus reducing the temperature rise speed of the power battery.

[0118] Among them, the power increase value for increasing the first output power can be determined by the offset value, and the power increase value is not greater than the offset value.

[0119] In this way, after the adjustment, the second output power will not be greater than the predicted working power. Thus, while reducing the power output from the power battery to the drive motor, it is also possible to avoid the fuel cell generating excess energy flowing to the power battery and charging the power battery. Therefore, the secondary conversion of energy can be avoided and the energy conversion efficiency of the vehicle can be improved.

[0120] Therefore, in one example, the power increase value can be determined as the offset value. In this way, after adjustment, the second output power is equal to the predicted operating power. That is to say, at the next moment, the second output power output by the fuel cell can exactly meet the predicted operating power required by the drive motor, and the power battery does not need to output power to the drive motor, greatly reducing the discharge power of the power battery and effectively reducing the temperature rise rate of the power battery. At the same time, since the second output power exactly meets the predicted operating power required by the drive motor, the fuel cell does not output power to the power battery, avoiding the secondary conversion of energy.

[0121] Among them, the first output power can be increased by the VCU. That is to say, when the VCU monitors that the temperature of the power battery is greater than the preset temperature, and determines the predicted operating power required by the drive motor at the next moment, and determines the offset of the predicted operating power relative to the first output power, the power increase value can be determined by the offset value, and then the first output power is increased according to the power increase value to obtain the second output power. And when the next moment arrives, the fuel cell is controlled to output according to the second output power.

[0122] In an alternative embodiment, the power adjustment value includes a power reduction value. Determining the adjustment power value of the first output power based on the offset value and the offset direction includes:

[0123] In the case where the offset direction indicates that the predicted operating power is less than the first output power and the offset value is greater than the second preset value, the power reduction value is determined based on the offset value;

[0124] Adjusting the first output power according to the power adjustment value to obtain the second output power includes:

[0125] Reducing the first output power according to the power reduction value to obtain the second output power.

[0126] When the offset direction corresponding to the offset indicates that the predicted operating power is less than the first output power, it means that at the next moment, if the fuel cell still outputs according to the first output power, the fuel cell will not only output power to the drive motor but also output power to the power battery. Among them, if the offset value corresponding to the offset is large, it means that the fuel cell will output a large amount of power to the power battery. In this way, not only does it increase the secondary conversion of energy, but also increases the charging power of the power battery, accelerating the temperature rise rate of the power battery and increasing the risk that the power battery cannot be charged or discharged due to excessive temperature.

[0127] Based on this, in the embodiment of the present invention, when the predicted working power represented by the offset direction is less than the first output power and the offset value is greater than the second preset value, the first output power is adjusted to obtain the second output power. Among them, the second preset value can be set according to the actual capacity of the power battery. For a power battery with a larger capacity, the corresponding second preset value is also larger; on the contrary, for a power battery with a smaller capacity, the corresponding second preset value is also smaller.

[0128] Among them, in order to reduce the power output from the fuel cell to the power battery, the embodiment of the present invention adjusts according to the power reduction value of the first output power and reduces the first output power to the second output power. Among them, the power reduction value represents that when adjusting the first output power, the first output power is adjusted in the decreasing direction. In this way, after the adjustment, the difference between the obtained second output power and the predicted working power can be reduced, thereby reducing the charging power of the power battery, reducing the secondary conversion of energy, and reducing the temperature rise rate of the power battery.

[0129] Among them, the power reduction value for reducing the first output power can be determined by the offset value, and the power reduction value is not greater than the offset value.

[0130] In this way, after the adjustment, the second output power will not be less than the predicted working power. That is to say, when the next moment arrives, the situation where the power battery outputs power to the drive motor will not occur, avoiding excessive adjustment of the first output power, increasing the discharge power of the power battery, and thus accelerating the temperature rise rate of the power battery.

[0131] Therefore, in one example, the power reduction value can be determined as the offset value. In this way, after the adjustment, the second output power is equal to the predicted working power. That is to say, at the next moment, the second output power output by the fuel cell can exactly meet the predicted working power required by the drive motor, and the fuel cell will not output power to the power battery, avoiding the secondary conversion of energy. At the same time, since the second output power exactly meets the predicted working power required by the drive motor, there is no need for the power battery to output power to the drive motor. In this way, the discharge of the power battery is stopped, greatly reducing the temperature rise rate of the power battery.

[0132] Among them, the first output power can be reduced by the VCU. That is to say, when the VCU monitors that the temperature of the power battery is greater than the preset temperature, and determines the predicted working power required by the drive motor at the next moment and the offset of the predicted working power relative to the first output power, the power reduction value can be determined by the offset value, and then the first output power is reduced according to the power reduction value to obtain the second output power. And when the next moment arrives, control the fuel cell to output according to the second output power.

[0133] In an alternative embodiment, before obtaining a plurality of first historical operating powers of the drive motor before the current moment in response to the temperature of the power battery being greater than a preset temperature, the control method further includes:

[0134] In response to the SOC value of the power battery being lower than a preset SOC threshold, controlling the fuel cell to output power to the drive motor and / or controlling the fuel cell to output power to the power battery;

[0135] After controlling the fuel cell to output power according to the second output power, the method further includes:

[0136] When controlling the fuel cell to output power to the drive motor, if the second output power is higher than the first output power, reducing the power output from the power battery to the drive motor;

[0137] When controlling the fuel cell to output power to the drive motor and the power battery, if the second output power is lower than the first output power, reducing the power output from the fuel cell to the power battery.

[0138] When the SOC value of the power battery is lower than the preset SOC threshold, it indicates that the SOC of the power battery is relatively low. At this time, if the power battery is controlled to output a large amount of power to the drive motor, the temperature rise rate of the power battery will increase; if the fuel cell is controlled to output a large amount of power to the power battery, it will not only increase the secondary conversion of energy, but also increase the charging power of the power battery, thereby accelerating the temperature rise rate of the power battery. Among them, the preset SOC threshold can be set according to the actual capacity of the power battery.

[0139] Therefore, after determining that the SOC value of the power battery is lower than the preset SOC threshold, the fuel cell can be controlled to output power to the drive motor and / or the fuel cell can be controlled to output power to the power battery.

[0140] Among them, the SOC value of the power battery can be obtained through the VCU. The VCU monitors the SOC of the power battery in real time. After the VCU monitors that the SOC value of the power battery is lower than the preset SOC threshold, it controls the fuel cell to output power to the drive motor and / or controls the fuel cell to output power to the power battery.

[0141] In this way, after determining the second output power of the fuel cell at the next moment, when the VCU controls the fuel cell to output power to the drive motor, if the second output power is higher than the first output power, it indicates that the power output from the fuel cell to the drive motor increases. Then, the power output from the power battery to the drive motor can be reduced. If the second output power is not only higher than the first output power but also exactly meets the working power required by the drive motor, the power output from the power battery to the drive motor can be reduced to zero, thereby reducing the discharge power of the power battery and further decreasing the temperature rise rate of the power battery.

[0142] When the VCU controls the fuel cell to output power to the drive motor and the power battery, if the second output power is lower than the first output power, it indicates that the power output from the fuel cell decreases. To meet the working power required by the drive motor, the power output from the fuel cell to the power battery can be reduced, thereby reducing the charging power of the power battery. In this way, not only can the temperature rise rate of the power battery be reduced, but also the secondary conversion of energy can be decreased.

[0143] In addition to the above two cases, the VCU can also control the fuel cell to output power to the power battery. In this case, it indicates that the power output from the fuel cell is greater than the working power required by the drive motor. After meeting the working power required by the drive motor, the fuel cell outputs power to the power battery to charge the power battery, increasing the charging power of the power battery, that is, increasing the temperature rise rate of the power battery, and there will be a risk of excessive temperature of the power battery. Therefore, to avoid the above risk, the power output from the fuel cell to the power battery can be reduced, thereby reducing the charging power of the power battery and thus decreasing the temperature rise rate of the power battery. At the same time, since the power output from the fuel cell to the power battery is reduced, the secondary conversion of energy can also be decreased, thereby improving the energy conversion efficiency of the vehicle.

[0144] In an optional implementation manner, determining the predicted working power required by the drive motor at the next moment after the current moment based on the multiple first historical working powers includes:

[0145] Performing a preset operation on the multiple first historical working powers to obtain the predicted working power; or,

[0146] Inputting the multiple first historical working powers into a target neural network model, and using the working power output by the target neural network model as the predicted working power;

[0147] Wherein, the target neural network model is obtained by training a preset network with multiple actual working power samples of the drive motor as training samples.

[0148] In one example, for obtaining the predicted working power, it can be obtained by performing a preset operation on multiple first historical working powers. Among them, the preset operation performed can be calculating the average value of multiple first historical working powers, or taking the median of multiple first historical working powers, etc. The embodiments of the present invention do not make specific limitations here.

[0149] In another example, for obtaining the predicted working power, it can also be achieved by inputting multiple first historical working powers into a target neural network model, and taking the working power output by the target neural network model as the predicted working power; among them, the target neural network model is trained by using multiple actual working power samples of the drive motor as training samples for a preset network.

[0150] Among them, the preset network is a saved network that has been trained on a large dataset (usually a large-scale image classification task) before. In the embodiments of the present invention, the large dataset refers to the dataset of the working power of the drive motor.

[0151] Therefore, after obtaining multiple actual working powers of the drive motor, multiple actual working powers can be used as training samples to train the preset network to obtain the target neural network model.

[0152] Among them, the steps of obtaining multiple first historical working powers include:

[0153] Obtaining multiple second historical working powers of the drive motor during a preset driving mileage of the vehicle before the current moment;

[0154] Obtaining multiple third historical working powers of the drive motor during a preset time period of the vehicle before the current moment;

[0155] Determining multiple first historical working powers based on multiple second historical working powers and / or multiple third historical working powers.

[0156] Among them, in order to ensure that a relatively accurate predicted working power can be obtained through the obtained first historical working powers, and at the same time avoid complex calculation processes or training processes, the embodiments of the present invention obtain multiple second historical working powers of the drive motor during a preset driving mileage of the vehicle before the current moment, where the preset driving mileage can be 10 kilometers; and, obtain multiple third historical working powers of the drive motor during a preset time period of the vehicle before the current moment, where the preset time period can be 10 minutes.

[0157] In this way, after obtaining multiple second historical working powers and multiple third historical working powers, multiple first historical working powers can be determined according to multiple second historical working powers and / or multiple third historical working powers.

[0158] Exemplarily, multiple second historical operating powers can be determined as multiple first historical operating powers; multiple third historical operating powers can also be determined as multiple first historical operating powers; or, when multiple second historical operating powers and multiple third historical operating powers are obtained, the number of the obtained second historical operating powers and the number of the third historical operating powers are compared, and the one with the smaller number is selected as the first historical operating power. This can make the determined multiple first historical operating powers closer to the operating power required by the drive motor at the next moment, thereby further ensuring the accuracy of the obtained predicted operating power.

[0159] In one example, the above method for controlling the output power of the fuel cell can also be applied to the range extender. That is, in a range-extended vehicle, the output power of the range extender can be adjusted to reduce the charging power or discharging power of the power battery, thereby reducing the temperature rise rate of the power battery and further avoiding the situation where the power battery cannot be charged or discharged due to excessive temperature. At the same time, when reducing the charging power of the power battery, the secondary conversion of energy is reduced to improve the energy conversion efficiency of the vehicle.

[0160] Next, with reference to Figure 3 , a specific example is combined to illustrate the embodiments of the present invention:

[0161] The power battery adopted by a certain vehicle is a lithium battery. At a certain moment, the VCU monitors that the SOC of the power battery is low and requests the fuel cell to generate electricity at a certain power to supply the power battery or the drive motor. After the VCU requests the fuel cell to generate electricity, as Figure 3 shown, the VCU monitors the temperature of the power battery in real time. At another moment, the VCU monitors that the temperature of the power battery is greater than 40°C. At this time, in response to the temperature of the power battery being greater than 40°C, the VCU obtains multiple second historical operating powers of the drive motor during the vehicle's 10-kilometer drive before the current moment, and obtains the first output power of the fuel cell at the current moment.

[0162] Next, the VCU calculates the average value of the multiple second historical operating powers, determines the calculated result as the predicted operating power required by the drive motor at the next moment after the current moment, and determines the offset of the predicted operating power relative to the first output power.

[0163] After determining the offset, if the offset direction corresponding to the offset indicates that the predicted working power is greater than the first output power, and the offset value corresponding to the offset is greater than the first preset value, the power increase value is determined as the offset value, and the VCU increases the first output power according to the power increase value, so that the obtained second output power is the same as the predicted working power, and the difference between the second output power and the predicted working power is reduced to zero. In this way, when the next moment arrives, the second output power output by the fuel cell can exactly meet the predicted working power required by the drive motor, and the power battery does not need to output power to the drive motor, greatly reducing the discharge power of the power battery and effectively reducing the temperature rise rate of the power battery. At the same time, since the second output power exactly meets the predicted working power required by the drive motor, the fuel cell does not output power to the power battery, avoiding the secondary conversion of energy.

[0164] If the offset direction corresponding to the offset indicates that the predicted working power is less than the first output power, and the offset value corresponding to the offset is greater than the second preset value, the power reduction value is determined as the offset value, and the VCU reduces the first output power according to the power reduction value, so that the obtained second output power is the same as the predicted working power, and the difference between the second output power and the predicted working power is reduced to zero. In this way, when the next moment arrives, the second output power output by the fuel cell can exactly meet the predicted working power required by the drive motor, and the fuel cell does not output power to the power battery, avoiding the secondary conversion of energy. At the same time, since the second output power exactly meets the predicted working power required by the drive motor, there is no need for the power battery to output power to the drive motor, so the discharge of the power battery is stopped, greatly reducing the temperature rise rate of the power battery.

[0165] Based on the same inventive concept, an embodiment of the present invention further provides a control device for the output power of a fuel cell, which is applied to a vehicle. The vehicle includes a power battery, a fuel cell, and a drive motor. The control device may specifically refer to Figure 4 , Figure 4 shows a block diagram of a control device for the output power of a fuel cell according to an embodiment of the present invention. As Figure 4 shown, the control device includes:

[0166] An acquisition unit 101, configured to obtain a plurality of first historical working powers of the drive motor before the current moment and the first output power of the fuel cell at the current moment in response to the temperature of the power battery being greater than a preset temperature;

[0167] A first determination unit 102, configured to determine the predicted working power required by the drive motor at the next moment after the current moment based on the plurality of first historical working powers; and determine the offset of the predicted working power relative to the first output power;

[0168] A second determination unit 103, configured to determine a second output power of the fuel cell at the next moment based on the offset, so as to reduce a difference between the second output power and the predicted operating power;

[0169] A control unit 104, configured to control the fuel cell to output according to the second output power when the next moment arrives, where the second output power is used to be output to the drive motor or allocated to the drive motor and the power battery.

[0170] In an alternative embodiment, the first determination unit 102 further includes:

[0171] A first predicted operating power determination unit, configured to perform a preset operation on a plurality of the first historical operating powers to obtain the predicted operating power; or,

[0172] A second predicted operating power determination unit, configured to input a plurality of the first historical operating powers into a target neural network model, and use the operating power output by the target neural network model as the predicted operating power;

[0173] Wherein, the target neural network model is obtained by training a preset network with a plurality of actual operating power samples of the drive motor as training samples.

[0174] In an alternative embodiment, the second determination unit 103 further includes:

[0175] An offset determination unit, configured to determine an offset value and an offset direction corresponding to the offset, where the offset direction indicates whether the predicted operating power is greater than the first output power;

[0176] A power adjustment value determination unit, configured to determine a power adjustment value for the first output power based on the offset value and the offset direction;

[0177] An adjustment unit, configured to adjust the first output power according to the power adjustment value to obtain the second output power.

[0178] In an alternative embodiment, the power adjustment value includes a power increase value, and the power adjustment value determination unit further includes:

[0179] A power increase value determination unit, configured to determine the power increase value based on the offset value when the offset direction indicates that the predicted operating power is greater than the first output power and the offset value is greater than a first preset value;

[0180] The adjustment unit further includes;

[0181] The first power boosting unit is configured to boost the first output power according to the power increment value to obtain the second output power.

[0182] In an alternative embodiment, the power adjustment value includes a power reduction value, and the power adjustment value determination unit further includes:

[0183] The power reduction value determination unit is configured to determine the power reduction value based on the offset value when the offset direction indicates that the predicted working power is less than the first output power and the offset value is greater than a second preset value;

[0184] The adjustment unit further includes;

[0185] The first power reduction unit is configured to reduce the first output power according to the power reduction value to obtain the second output power.

[0186] In an alternative embodiment, the control device further includes:

[0187] The power output unit is configured to control the fuel cell to output power to the drive motor and / or control the fuel cell to output power to the power battery in response to the SOC value of the power battery being lower than a preset SOC threshold, and the power output unit operates before the acquisition unit 101;

[0188] The second power reduction unit is configured to reduce the power output from the power battery to the drive motor if the second output power is higher than the first output power when controlling the fuel cell to output power to the drive motor, and the second power reduction unit operates after the control unit 104;

[0189] The second power boosting unit is configured to reduce the power output from the fuel cell to the power battery if the second output power is lower than the first output power when controlling the fuel cell to output power to the drive motor and the power battery, and the second power boosting unit operates after the control unit 104.

[0190] In an alternative embodiment, the acquisition unit 101 further includes:

[0191] The first acquisition unit is configured to acquire a plurality of second historical working powers of the drive motor during a preset driving mileage of the vehicle before the current moment;

[0192] The second acquisition unit is configured to acquire a plurality of third historical working powers of the drive motor during a preset time period of the vehicle before the current moment;

[0193] The first historical working power determination unit is configured to determine a plurality of the first historical working powers based on the plurality of the second historical working powers and / or the plurality of the third historical working powers.

[0194] Based on the same inventive concept, an embodiment of the present invention further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. The processor is configured to execute a method for controlling the output power of a fuel cell as described above.

[0195] Based on the same inventive concept, an embodiment of the present invention further provides a vehicle, including a control module, where the control module is configured to implement a method for controlling the output power of a fuel cell as described above.

[0196] Those skilled in the art should understand that the embodiments of the present invention may be provided as a method, a device, or a computer program product. Therefore, the embodiments of the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0197] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal devices generate a device for implementing the functions specified in Figure 1 one or more flows and / or blocks Figure 1 one or more blocks.

[0198] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal devices to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the functions specified in Figure 1 one or more flows and / or blocks Figure 1 one or more blocks.

[0199] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device, so that a series of operation steps are executed on the computer or other programmable terminal device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable terminal device provide for implementing the process Figure 1 in one process or multiple processes and / or blocks Figure 1 steps for the functions specified in one block or multiple blocks.

[0200] Although the preferred embodiments of the embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

[0201] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the element.

[0202] The above has introduced in detail a method for controlling the output power of a fuel cell, a control device and a vehicle provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A method for controlling the output power of a fuel cell, characterized in that, applied to a vehicle, the vehicle includes a power battery, a fuel cell and a drive motor, and the control method includes: In response to the temperature of the power battery being greater than a preset temperature, obtain a plurality of first historical working powers of the drive motor before the current moment, and the first output power of the fuel cell at the current moment; Based on the plurality of first historical working powers, determine the predicted working power required by the drive motor at the next moment after the current moment; and determine the offset of the predicted working power relative to the first output power; Based on the offset, determine the second output power of the fuel cell at the next moment to reduce the difference between the second output power and the predicted working power; When the next moment arrives, control the fuel cell to output according to the second output power, where the second output power is used to output to the drive motor or distributed to the drive motor and the power battery.

2. The method for controlling the output power of a fuel cell according to claim 1, characterized in that, The determining the predicted working power required by the drive motor at the next moment after the current moment based on the plurality of first historical working powers includes: Performing a preset operation on the plurality of first historical working powers to obtain the predicted working power; or, Inputting the plurality of first historical working powers into a target neural network model, and taking the working power output by the target neural network model as the predicted working power; Wherein, the target neural network model is obtained by training a preset network with a plurality of actual working power samples of the drive motor as training samples.

3. The method for controlling the output power of a fuel cell according to claim 1, characterized in that, The determining the second output power of the fuel cell at the next moment based on the offset includes: Determine the offset value and offset direction corresponding to the offset, where the offset direction indicates whether the predicted working power is greater than the first output power; Based on the offset value and the offset direction, determine the power adjustment value for the first output power; Adjust the first output power according to the power adjustment value to obtain the second output power.

4. The method for controlling the output power of a fuel cell according to claim 3, characterized in that, The power adjustment value includes a power increase value, and the determining the adjustment power value for the first output power based on the offset value and the offset direction includes: In the case where the offset direction indicates that the predicted working power is greater than the first output power and the offset value is greater than a first preset value, determine the power increase value based on the offset value; Adjusting the first output power according to the power adjustment value to obtain the second output power includes; Increasing the first output power according to the power increase value to obtain the second output power.

5. The method for controlling the output power of a fuel cell according to claim 3, It is characterized in that the power adjustment value includes a power reduction value, and determining the adjustment power value of the first output power based on the offset value and the offset direction includes: when the offset direction indicates that the predicted operating power is less than the first output power and the offset value is greater than a second preset value, determining the power reduction value based on the offset value; adjusting the first output power according to the power adjustment value to obtain the second output power, including; reducing the first output power according to the power reduction value to obtain the second output power.

6. A method for controlling the output power of a fuel cell according to claim 1, It is characterized in that before obtaining the plurality of first historical operating powers of the drive motor before the current moment in response to the temperature of the power battery being greater than a preset temperature, the control method further includes: in response to the SOC value of the power battery being lower than a preset SOC threshold, controlling the fuel cell to output power to the drive motor, and / or controlling the fuel cell to output power to the power battery; after controlling the fuel cell to output power according to the second output power, the control method further includes: when controlling the fuel cell to output power to the drive motor, if the second output power is higher than the first output power, reducing the power output from the power battery to the drive motor; when controlling the fuel cell to output power to the drive motor and the power battery, if the second output power is lower than the first output power, reducing the power output from the fuel cell to the power battery.

7. A method for controlling the output power of a fuel cell according to any one of claims 1-6, It is characterized in that the step of obtaining the plurality of first historical operating powers includes: obtaining a plurality of second historical operating powers of the drive motor during a preset driving mileage of the vehicle before the current moment; obtaining a plurality of third historical operating powers of the drive motor during a preset time period of the vehicle before the current moment; determining the plurality of first historical operating powers based on the plurality of second historical operating powers and / or the plurality of third historical operating powers.

8. A control device for the output power of a fuel cell, It is characterized in that applied to a vehicle, the vehicle includes a power battery, a fuel cell and a drive motor, and the control device includes: an acquisition unit, configured to obtain a plurality of first historical operating powers of the drive motor before the current moment and the first output power of the fuel cell at the current moment in response to the temperature of the power battery being greater than a preset temperature; a first determination unit, configured to determine the predicted operating power required by the drive motor at the next moment after the current moment based on the plurality of first historical operating powers; and determine the offset of the predicted operating power relative to the first output power; A second determination unit, configured to determine a second output power of the fuel cell at the next moment based on the offset, so as to reduce a difference between the second output power and the predicted operating power; A control unit, configured to control the fuel cell to output according to the second output power when the next moment arrives, where the second output power is used to be output to the drive motor or distributed to the drive motor and the power battery.

9. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein, the processor is configured to execute and implement a method for controlling an output power of a fuel cell according to any one of claims 1-7.

10. A vehicle, wherein, the vehicle includes a control module, and the control module is configured to implement a method for controlling an output power of a fuel cell according to any one of claims 1-7.

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