Output power determination method and apparatus, electronic device, medium and vehicle

Abstract

The present disclosure relates to an output power determination method and apparatus, an electronic device, a medium and a vehicle. The method comprises: acquiring a state-of-charge (SOC) value of a power battery of a vehicle; acquiring a travel speed of the vehicle and a first travel duration of continuous travel of the vehicle, the first travel duration being a duration during which the vehicle currently and continuously travels at a travel speed greater than a preset speed threshold; on the basis of the SOC value and the first travel duration, determining a candidate output power of a fuel cell of the vehicle; and using the minimum power among the candidate output power of the fuel cell, a maximum charging power of the power battery and a maximum output power of the fuel cell as a target output power of the fuel cell. The technical solution of the present disclosure can reduce the load change frequency of fuel cells, improve the working efficiency of the fuel cells, and increase the travel mileage of vehicles.

Description

Output power determination method, device, electronic device, medium, and vehicle Technical Field

[0001] The present invention relates to the field of fuel cell vehicles, and in particular to a method, device, electronic equipment, medium and vehicle for determining output power. Background Art

[0002] In related technologies, fuel cell energy control methods mainly adjust the output power of the fuel cell based on the vehicle's required power and SOC value (State Of Charge). However, in actual use, in addition to changes in required power and SOC value, vehicles also face different driving conditions (such as driving speed and driving time). Therefore, the use of the above method will cause the vehicle fuel cell to frequently change load, resulting in high hydrogen consumption of the fuel cell and shortening the service life of the fuel cell and power battery.

[0003] Summary of the Invention

[0004] The present disclosure aims to provide a method, device, electronic device, medium and vehicle for determining output power.

[0005] According to a first aspect of an embodiment of the present disclosure, a method for determining output power is provided, including:

[0006] Obtain the state of charge (SOC) value of the vehicle's power battery;

[0007] Obtaining a driving speed of the vehicle and a first driving duration of the vehicle, where the first driving duration is a duration during which the vehicle is currently driving at a speed greater than a preset speed threshold;

[0008] determining a candidate output power of a fuel cell of the vehicle according to the SOC value and the first driving duration;

[0009] The minimum power among the candidate output power of the fuel cell, the maximum charging power of the power battery and the maximum output power of the fuel cell is used as the target output power of the fuel cell.

[0010] Optionally, determining the candidate output power of the fuel cell of the vehicle according to the SOC value and the first driving duration includes:

[0011] When the SOC value is less than a first preset SOC value, obtaining a first average power of the vehicle demand power within a first preset historical time period, where the first preset historical time period is a time period between the current moment and a first specified historical moment;

[0012] determining a candidate output power of the fuel cell according to the first driving duration, the first average power, and a second driving duration, wherein the second driving duration is a duration during which the vehicle is currently driving at a speed less than or equal to a preset speed threshold; or

[0013] When the SOC value is greater than or equal to the first preset SOC value, a fourth preset output power is used as a candidate output power of the fuel cell.

[0014] Optionally, determining the candidate output power of the fuel cell according to the first driving duration, the first average power, and the second driving duration includes:

[0015] In the case where the SOC value is less than the first preset SOC value and greater than or equal to the second preset SOC value, the first preset SOC value is greater than the second preset SOC value,

[0016] If the first driving duration is greater than or equal to a first preset duration threshold and less than a second preset duration threshold, the first average power is used as a candidate output power of the fuel cell; or

[0017] If the first driving duration is greater than or equal to a second preset duration threshold, obtaining a second average power of the vehicle demand power within a second preset historical time period; calculating a difference between the first average power and the second average power, and determining a candidate output power of the fuel cell according to the difference; the second preset historical time period is a time period between a first designated historical moment and a second designated historical moment, and the second designated historical moment is earlier than the first designated historical moment; or,

[0018] If the second driving duration is greater than or equal to the third preset duration threshold, the minimum output power of the fuel cell is used as the candidate output power of the fuel cell; or

[0019] If the first driving duration is less than the first preset duration threshold, or the second driving duration is less than the third preset duration threshold, the first preset output power is used as the candidate output power of the fuel cell.

[0020] Optionally, determining the candidate output power of the fuel cell of the vehicle according to the difference includes:

[0021] In a case where the difference is less than a preset power difference threshold, taking the second average power as the candidate output power of the fuel cell; or

[0022] When the difference is greater than or equal to the preset power difference threshold, the first average power is used as the candidate output power of the fuel cell.

[0023] Optionally, determining the candidate output power of the fuel cell according to the first driving duration, the first average power, and the second driving duration further includes:

[0024] When the SOC value is less than the second preset SOC value and greater than or equal to a third preset SOC value, the second preset SOC value is greater than the third preset SOC value;

[0025] If the first driving duration is greater than or equal to the first preset duration threshold, determining a first compensation power according to the SOC value, compensating the first average power according to the first compensation power to obtain a first target power, and using the first target power as a candidate output power of the fuel cell; or

[0026] If the second driving duration is less than the third preset duration threshold, or the first driving duration is less than the first preset duration threshold, the second preset output power is used as the candidate output power of the fuel cell; or

[0027] If the second driving duration is greater than or equal to the third preset duration threshold, the third preset output power is used as the candidate output power of the fuel cell.

[0028] Optionally, determining the first compensation power according to the SOC value includes:

[0029] determining a target SOC range corresponding to the SOC value from a plurality of preset SOC ranges;

[0030] According to the target SOC range, the first compensation power is determined by a preset power compensation correspondence relationship, where the power compensation correspondence relationship includes a compensation power corresponding to each preset SOC value range.

[0031] Optionally, determining the candidate output power of the fuel cell according to the first driving duration, the first average power, and the second driving duration further includes:

[0032] When the SOC value is less than the third preset SOC value,

[0033] If the first driving duration is greater than or equal to a first preset duration threshold and less than a second preset duration threshold, determining a second compensation power according to the SOC value, compensating the first average power according to the second compensation power to obtain a second target power, and using the second target power as a candidate output power of the fuel cell; or

[0034] If the first driving duration is greater than or equal to a second preset duration threshold, determining a candidate output power of the fuel cell according to the first average power and the second average power; or

[0035] If the second driving duration is greater than or equal to a third preset duration threshold, the first average power is used as the candidate output power of the fuel cell; or

[0036] If the first driving duration is less than the first preset duration threshold, or the second driving duration is less than the third preset duration threshold, the fourth preset output power is used as the candidate output power of the fuel cell.

[0037] Optionally, determining the candidate output power of the fuel cell according to the first average power and the second average power includes:

[0038] In a case where the first average power is less than or equal to the second average power, taking the second average power as the candidate output power of the fuel cell; or

[0039] When the first average power is greater than the second average power, the first average power is used as a candidate output power of the fuel cell.

[0040] According to a second aspect of an embodiment of the present disclosure, there is provided a device for determining output power, including:

[0041] A first acquisition module is used to obtain the state of charge (SOC) value of the vehicle's power battery;

[0042] a second acquisition module, configured to acquire a driving speed of the vehicle and a first driving duration of the vehicle, wherein the first driving duration is a duration during which the vehicle is currently driving at a speed greater than a preset speed threshold;

[0043] a first determining module, configured to determine a candidate output power of a fuel cell of the vehicle according to the SOC value and the first driving duration;

[0044] The second determining module is configured to use the minimum power among the candidate output power of the fuel cell, the maximum charging power of the power battery, and the maximum output power of the fuel cell as the target output power of the fuel cell.

[0045] Optionally, the first determining module includes:

[0046] a first acquisition submodule, configured to acquire, when the SOC value is less than a first preset SOC value, a first average power of the vehicle demand power within a first preset historical time period, the first preset historical time period being a time period between a current moment and a first specified historical moment;

[0047] a first determining submodule, configured to determine a candidate output power of the fuel cell according to the first driving duration, the first average power, and a second driving duration, wherein the second driving duration is a duration during which the vehicle is currently driving at a speed less than or equal to a preset speed threshold; or

[0048] The second determining submodule is configured to use a fourth preset output power as a candidate output power of the fuel cell when the SOC value is greater than or equal to the first preset SOC value.

[0049] Optionally, the first determining submodule is configured to determine that, when the SOC value is less than the first preset SOC value and greater than or equal to a second preset SOC value, the first preset SOC value is greater than the second preset SOC value;

[0050] If the first driving duration is greater than or equal to a first preset duration threshold and less than a second preset duration threshold, the first average power is used as a candidate output power of the fuel cell; or

[0051] If the first driving duration is greater than or equal to a second preset duration threshold, obtaining a second average power of the vehicle demand power within a second preset historical time period; calculating a difference between the first average power and the second average power, and determining a candidate output power of the fuel cell according to the difference; the second preset historical time period is a time period between a first designated historical moment and a second designated historical moment, and the second designated historical moment is earlier than the first designated historical moment; or,

[0052] If the second driving duration is greater than or equal to the third preset duration threshold, the minimum output power of the fuel cell is used as the candidate output power of the fuel cell; or

[0053] If the first driving duration is less than the first preset duration threshold, or the second driving duration is less than the third preset duration threshold, the first preset output power is used as the candidate output power of the fuel cell.

[0054] Optionally, the first determining submodule is configured to use the second average power as the candidate output power of the fuel cell when the difference is less than a preset power difference threshold; or

[0055] When the difference is greater than or equal to the preset power difference threshold, the first average power is used as the candidate output power of the fuel cell.

[0056] Optionally, the first determining submodule is configured to determine that, when the SOC value is less than the second preset SOC value and greater than or equal to a third preset SOC value, the second preset SOC value is greater than the third preset SOC value;

[0057] If the first driving duration is greater than or equal to the first preset duration threshold, determining a first compensation power according to the SOC value, compensating the first average power according to the first compensation power to obtain a first target power, and using the first target power as a candidate output power of the fuel cell; or

[0058] If the second driving duration is less than the third preset duration threshold, or the first driving duration is less than the first preset duration threshold, the second preset output power is used as the candidate output power of the fuel cell; or

[0059] If the second driving duration is greater than or equal to the third preset duration threshold, the third preset output power is used as the candidate output power of the fuel cell.

[0060] Optionally, the first determining submodule is configured to determine a target SOC range corresponding to the SOC value from a plurality of preset SOC ranges;

[0061] According to the target SOC range, the first compensation power is determined by a preset power compensation correspondence relationship, where the power compensation correspondence relationship includes a compensation power corresponding to each preset SOC value range.

[0062] Optionally, the first determining submodule is configured to, when the SOC value is less than a third preset SOC value,

[0063] If the first driving duration is greater than or equal to a first preset duration threshold and less than a second preset duration threshold, determining a second compensation power according to the SOC value, compensating the first average power according to the second compensation power to obtain a second target power, and using the second target power as a candidate output power of the fuel cell; or

[0064] If the first driving duration is greater than or equal to a second preset duration threshold, determining a candidate output power of the fuel cell according to the first average power and the second average power; or

[0065] If the second driving duration is greater than or equal to a third preset duration threshold, the first average power is used as the candidate output power of the fuel cell; or

[0066] If the first driving duration is less than the first preset duration threshold, or the second driving duration is less than the third preset duration threshold, the fourth preset output power is used as the candidate output power of the fuel cell.

[0067] Optionally, the first determining submodule is configured to use the second average power as the candidate output power of the fuel cell when the first average power is less than or equal to the second average power; or

[0068] When the first average power is greater than the second average power, the first average power is used as a candidate output power of the fuel cell.

[0069] According to a third aspect of an embodiment of the present disclosure, there is provided an electronic device, including:

[0070] a memory having a computer program stored thereon;

[0071] A processor is used to execute the computer program in the memory to implement the steps of the method for determining the output power provided in the first aspect of the embodiment of the present disclosure.

[0072] According to a fourth aspect of an embodiment of the present disclosure, a storage medium is provided, on which computer program instructions are stored. When the program instructions are executed by a processor, the steps of the method for determining the output power provided in the first aspect of the embodiment of the present disclosure are implemented.

[0073] According to the fifth aspect of the embodiment of the present disclosure, a vehicle is provided, comprising: a power battery, a fuel cell, and an output power determination device according to the second aspect of the embodiment of the present disclosure, wherein the power battery and the fuel cell are respectively connected to the output power determination device.

[0074] The above technical solution obtains the state of charge (SOC) value of the vehicle's power battery; takes the vehicle's driving speed and a first driving duration, where the first driving duration is the duration during which the vehicle is currently driving at a speed greater than a preset speed threshold; determines a candidate output power of the vehicle's fuel cell based on the SOC value, the driving speed, and the first driving duration; and uses the minimum of the candidate output power of the fuel cell, the maximum charging power of the power battery, and the maximum output power of the fuel cell as the target output power of the fuel cell. In this way, the candidate output power of the fuel cell can be determined based on the vehicle's SOC value, the vehicle's driving speed, and the first driving duration, and the target output power of the fuel cell can be determined by comprehensively considering the maximum charging power of the power battery and the maximum output power of the fuel cell. This improves the operating adaptability and efficiency of the fuel cell power control, thereby reducing the load variation frequency and the number of starts and stops of the fuel cell while meeting the vehicle's power requirements.

[0075] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0077] FIG1 is a flow chart of a method for determining output power provided by an exemplary embodiment of the present disclosure.

[0078] FIG2 is a flow chart of a method for determining battery output power provided by an exemplary embodiment of the present disclosure.

[0079] FIG3 is a flow chart of another method for determining battery output power provided by an exemplary embodiment of the present disclosure.

[0080] FIG4 is a flow chart of another method for determining battery output power provided by an exemplary embodiment of the present disclosure.

[0081] FIG5 is a flow chart of another method for determining battery output power provided by an exemplary embodiment of the present disclosure.

[0082] FIG6 is a block diagram of a device for determining output power according to an exemplary embodiment of the present disclosure.

[0083] FIG7 is a block diagram of a first determination module provided according to the embodiment shown in FIG6 .

[0084] FIG8 is a block diagram of an electronic device according to an exemplary embodiment of the present disclosure.

[0085] FIG9 is a block diagram of a vehicle according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0086] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0087] In the scenario disclosed herein, the fuel cell energy of the vehicle can be controlled by adjusting the output power of the fuel cell. On the one hand, the stability of the vehicle's fuel cell system can be improved and the vehicle's cruising range can be increased. On the other hand, the vehicle's hydrogen consumption can be reduced and the service life of the fuel cell can be extended. In related technologies, the output power of the fuel cell can be adjusted based on the vehicle's required power. For example, when the vehicle's SOC is within a preset SOC range, the average power of the vehicle in the current time period is used as the output power of the fuel cell. However, this method will frequently adjust the output power of the fuel cell, affecting the service life of the fuel cell.

[0088] To address the above-mentioned issues, the present disclosure provides a method, device, electronic device, medium, and vehicle for determining output power. The method can obtain the SOC value of a vehicle's power battery, the vehicle's driving speed, and the vehicle's continuous driving duration, and determine the candidate output power of the vehicle's fuel cell based on the SOC value, the driving speed, and the driving duration. Furthermore, the target output power of the fuel cell is determined based on the candidate output power of the fuel cell, the maximum charging power of the power battery, and the maximum output power of the fuel cell. In this way, the output power of the fuel cell can be adapted to various operating conditions of the vehicle, ensuring the operating efficiency of the fuel cell and minimizing the load change frequency and start-stop times of the fuel cell while meeting the power requirements of the entire vehicle.

[0089] The present disclosure is described below with reference to specific embodiments.

[0090] FIG1 is a flow chart of a method for determining output power provided by an exemplary embodiment of the present disclosure. As shown in FIG1 , the method includes steps S101 to S104 .

[0091] In step S101 , the SOC value of the vehicle's power battery is obtained.

[0092] Among them, the power battery is used to supplement the power consumed by the entire vehicle under high-load and high-power operation conditions, and to recover the remaining power of the fuel cell when the vehicle's power demand is low or the vehicle is performing braking energy recovery.

[0093] In step S102, the driving speed of the vehicle and a first driving duration of the vehicle are obtained.

[0094] The first driving duration is the duration during which the vehicle is currently driving at a speed greater than a preset speed threshold. For example, the duration during which the vehicle is continuously driving may be the duration during which the vehicle is continuously driving at a speed greater than 3 km / h.

[0095] In step S103 , a candidate output power of the fuel cell of the vehicle is determined according to the SOC value and the first driving duration.

[0096] In step S104 , the minimum power among the candidate output power of the fuel cell, the maximum charging power of the power battery, and the maximum output power of the fuel cell is used as the target output power of the fuel cell.

[0097] By adopting the above scheme, the output power of the fuel cell is controlled by different SOC values ​​and vehicle driving conditions, which improves the adaptability of the vehicle fuel cell power output to working conditions and increases the cruising range of the entire vehicle.

[0098] In some embodiments, the above step S103 may include the following steps:

[0099] In step S1031 , when the SOC value is less than a first preset SOC value, a first average power of the vehicle demand power within a first preset historical time period is obtained.

[0100] Among them, the first preset historical time period is the time period between the current moment and the first designated historical moment. For example, if the moment corresponding to 15 minutes back from the current moment is taken as the first designated historical moment, then the historical time period is the moment corresponding to the current moment to 15 minutes before the current moment, and the first average power is the average value of the vehicle demand power within the 15 minutes.

[0101] In step S1032 , a candidate output power of the fuel cell is determined according to the first driving duration, the first average power, and the second driving duration.

[0102] The second driving duration is the duration during which the vehicle is currently driving at a speed less than or equal to a preset speed threshold.

[0103] In step S1033, when the SOC value is greater than or equal to the first preset SOC value, the fourth preset output power is used as the candidate output power of the fuel cell.

[0104] Taking into account that when the SOC value is greater than or equal to the first preset SOC value, the vehicle's battery level is relatively high, it is not necessary to consider adjusting the output power of the fuel cell in the short term, and a fixed preset output power can be directly used as the candidate output power of the fuel cell. This can ensure that the fuel cell will not change load frequently, thereby increasing the battery's service life.

[0105] In some embodiments, the above step S1032 may include the following three situations:

[0106] Case 1: In the case where the SOC value is less than the first preset SOC value and greater than or equal to the second preset SOC value, the first preset SOC value is greater than the second preset SOC value.

[0107] Specifically, the following four possible implementation methods can be included:

[0108] In a first possible implementation manner, when the first driving duration is greater than or equal to a first preset duration threshold and less than a second preset duration threshold, the first average power is used as the candidate output power of the fuel cell.

[0109] Among them, the first driving duration is the duration during which the vehicle is currently traveling at a speed greater than a preset speed threshold, that is, when the current driving speed of the vehicle is greater than the preset speed threshold, the current moment is taken as the end moment, and the duration corresponding to the time period during which the vehicle is continuously traveling at a speed greater than the preset speed threshold is taken as the first driving duration.

[0110] For example, the preset speed threshold can be 3km / h, the first preset time threshold can be 15 minutes, the second preset time threshold can be 15 minutes or 30 minutes, and the second preset time threshold and the first preset time threshold can be the same or different; the duration of continuous driving of the vehicle when the vehicle's driving speed is greater than 3km / h can be used as the first driving duration. For example, when the vehicle continuously drives at a speed of 4-10km / h for 40 minutes, the first driving duration can be 40 minutes.

[0111] In this method, the SOC value is less than the first preset SOC value and greater than or equal to the second preset SOC value, indicating that the vehicle's power battery power is relatively high. At this time, using the average required power of the vehicle in the previous time period as the candidate output power of the fuel cell can reduce the power consumption of the power battery while meeting the vehicle's required power.

[0112] In a second possible implementation, when the first driving duration is greater than or equal to a second preset duration threshold, the second average power of the vehicle's required power within the second preset historical time period can be first obtained; then the difference between the first average power and the second average power is calculated, and the candidate output power of the fuel cell is determined based on the difference.

[0113] Among them, the second preset historical time period is the time period between the first specified historical moment and the second specified historical moment, the second specified historical moment is earlier than the first specified historical moment, and the first specified historical moment is determined by the current moment and the first preset duration threshold, and the second specified historical moment is determined based on the current moment, the first preset duration and the second preset duration threshold.

[0114] For example, determining the candidate output power of the fuel cell of the vehicle according to the difference may include the following implementation:

[0115] In the case where the difference is less than a preset power difference threshold, the second average power is used as the candidate output power of the fuel cell; or

[0116] When the difference is greater than or equal to the preset power difference threshold, the first average power is used as the candidate output power of the fuel cell.

[0117] Here, if the difference is less than the preset power difference threshold, it indicates that the vehicle's power demand has not changed much. At this time, the average power demand of the vehicle in the previous time period is used as the candidate output power of the fuel cell, which can avoid frequent load changes of the fuel cell. If the difference is greater than or equal to the preset power difference threshold, it indicates that the vehicle's power demand has changed greatly. In order to meet the vehicle's power demand and reduce the consumption of the power battery, the average power demand of the vehicle's current short operating time is used as the candidate output power of the fuel cell.

[0118] In a third possible implementation, when the second driving duration is less than or equal to the third preset duration threshold, the minimum output power of the fuel cell is used as the candidate output power of the fuel cell.

[0119] Here, the second driving duration is less than or equal to the third preset duration threshold, indicating that the vehicle is currently in a stopped state, or is about to stop. In this case, the vehicle's required power is relatively small. At this time, when the vehicle's power battery power is relatively high, the minimum output power of the fuel cell is used as the candidate output power of the fuel cell, which can reduce the hydrogen consumption of the fuel cell.

[0120] In a fourth possible implementation, when the first driving duration is less than the first preset duration threshold, or when the second driving duration is less than the third preset duration threshold, the first preset output power can be used as the candidate output power of the fuel cell.

[0121] In this case, since the first driving duration is less than the first preset duration threshold, it indicates that the vehicle has just started normal driving from a parked state. In this case, the preset first preset output power can be used as the candidate output power of the fuel cell.

[0122] For example, the last output power used in the previous driving process stored in the vehicle's processor can be used as the candidate output power of the fuel cell. Considering that when the vehicle just starts driving, the power level is approximately the same as the power level in the previous driving process, this can avoid frequent load changes of the fuel cell while meeting the vehicle's required power.

[0123] In another case, since the second driving duration is less than the third preset duration threshold, it indicates that the vehicle has just stopped after normal driving. In this case, the preset first preset output power can be used as the candidate output power of the fuel cell.

[0124] Case 2: For the case where the SOC value is less than the second preset SOC value and greater than or equal to the third preset SOC value, in this case, the second preset SOC value is greater than the third preset SOC value.

[0125] Specifically, there are three possible implementation methods:

[0126] In a first possible implementation, if the first driving duration is greater than or equal to the first preset duration threshold, the first compensation power can be first determined based on the SOC value, and the first average power can be compensated based on the first compensation power to obtain the first target power, and then the first target power can be used as the candidate output power of the fuel cell.

[0127] For example, the above-mentioned determination of the first compensation power according to the SOC value may include the following implementation manner: determining a target SOC range corresponding to the SOC value from a plurality of preset SOC ranges; and determining the first compensation power according to the target SOC range by using a preset power compensation correspondence relationship;

[0128] The power compensation correspondence includes the compensation power corresponding to each preset SOC value range.

[0129] In this method, the SOC value is less than the second preset SOC value and greater than or equal to the third preset SOC value, indicating that the vehicle's power battery is low. The average required power of the vehicle in the previous time period plus the compensation power is used as the candidate output power of the fuel cell. The lower the power battery power, the greater the power compensation power, and the higher the power battery power, the smaller the compensation power, which can reduce the power consumption of the power battery.

[0130] In a second possible implementation, if the second driving duration is less than the third preset duration threshold, or the first driving duration is less than the first preset duration threshold, the second preset output power is used as the candidate output power of the fuel cell.

[0131] Optionally, if the first driving duration is less than the first preset duration threshold, the second preset output power is used as the candidate output power of the fuel cell.

[0132] For example, the last output power used in the previous driving process stored in the vehicle's processor can be used as the candidate output power of the fuel cell. Considering that when the vehicle just starts driving, the power level is approximately the same as the power level in the previous driving process, this can avoid frequent load changes of the fuel cell while meeting the vehicle's required power.

[0133] In a third possible implementation, if the second driving duration is greater than or equal to the third preset duration threshold, the third preset output power is used as the candidate output power of the fuel cell.

[0134] Optionally, if the second driving duration is greater than or equal to the third preset duration threshold, the product of the rated output power of the fuel cell and the preset ratio may be used as the candidate output power of the fuel cell.

[0135] The preset ratio may be set as the ratio of the output power of the fuel cell when the efficiency is high to the rated power of the fuel cell.

[0136] Case 3: When the SOC value is less than the third preset SOC value, the following four possible implementations may be included:

[0137] In a first possible implementation, if the first driving duration is greater than or equal to a first preset duration threshold and less than a second preset duration threshold, the second compensation power can be first determined based on the SOC value, and the first average power can be compensated based on the second compensation power to obtain a second target power, and then the second target power can be used as a candidate output power of the fuel cell.

[0138] In this manner, the SOC value is less than the third preset SOC value, indicating that the vehicle's power battery is very low. The lower the power battery, the greater the power compensation power. The average power demand of the vehicle in the previous time period plus the compensation power can be used as the candidate output power of the fuel cell. The lower the power battery, the greater the power compensation power, and the higher the power battery, the smaller the compensation power, which can avoid power consumption of the power battery.

[0139] In this way, when the power battery of the vehicle is low, the power can be compensated, thereby avoiding excessive consumption of the power battery.

[0140] In a second possible implementation, if the first driving duration is greater than or equal to a second preset duration threshold, the candidate output power of the fuel cell is determined according to the first average power and the second average power.

[0141] For example, the above-mentioned determination of the candidate output power of the fuel cell according to the first average power and the second average power may include the following implementation:

[0142] When the first average power is less than or equal to the second average power, the second average power is used as the candidate output power of the fuel cell; or, when the first average power is greater than the second average power, the first average power is used as the candidate output power of the fuel cell.

[0143] By adopting the above technical solution, since the first driving time of the vehicle is greater than or equal to the second preset time threshold, it can be known that the vehicle may have performed power compensation within the second preset time threshold. At this time, the current candidate output power can be directly determined based on the first average power and the second average power, which can improve the efficiency of determining the candidate output power.

[0144] In a third possible implementation, if the second driving duration is greater than or equal to a third preset duration threshold, the first average power may be used as a candidate output power of the fuel cell.

[0145] In this step, since the second driving time of the vehicle is greater than or equal to the third preset time threshold, it can be known that the state of the vehicle may be a long-term stopped state. Therefore, the output power last used in the previous driving process stored in the vehicle's processor can be used as the candidate output power of the fuel cell. Considering that when the vehicle just starts driving, the power level is approximately the same as the power level in the previous driving process, this can avoid frequent load changes of the fuel cell while meeting the vehicle's required power.

[0146] In a fourth possible implementation, if the first driving duration is less than the first preset duration threshold, or the second driving duration is less than the third preset duration threshold, the fourth preset output power is used as the candidate output power of the fuel cell.

[0147] FIG2 is a flow chart of a method for determining battery output power provided by an exemplary embodiment of the present disclosure. As shown in FIG2 , the method includes steps S201 to S207 .

[0148] In step S201 , the state of charge (SOC) value of the vehicle's power battery is obtained.

[0149] In step S202, the driving speed of the vehicle and a first driving duration of the vehicle are obtained.

[0150] The first driving duration is the duration during which the vehicle is currently driving at a speed greater than a preset speed threshold.

[0151] In step S203 , it is determined whether the SOC value is less than a first preset SOC value.

[0152] If the SOC value is less than the first preset SOC value, executing steps S204, S205 and S207;

[0153] When the SOC value is greater than or equal to the first preset SOC value, steps S206 and S207 are executed.

[0154] In step S204 , a first average power of vehicle demand power within a first preset historical time period is obtained.

[0155] The first preset time period is the time period between the current moment and the first specified historical moment.

[0156] In step S205 , a candidate output power of the fuel cell is determined according to the first driving duration and the first average power.

[0157] In step S206 , the fifth preset output power is used as a candidate output power of the fuel cell.

[0158] In step S207 , the minimum power among the candidate output power of the fuel cell, the maximum charging power of the power battery, and the maximum output power of the fuel cell is used as the target output power of the fuel cell.

[0159] In some embodiments, step S205 may include the following three situations, which are described with reference to FIG. 3 to FIG. 5 , respectively.

[0160] Case 1, referring to FIG. 3 , in some embodiments, for a case where the SOC value is less than the first preset SOC value and greater than or equal to the second preset SOC value, the first preset SOC value is greater than the second preset SOC value, and the method may specifically include the following steps:

[0161] In step S301, the second driving duration is acquired, wherein the second driving duration is the duration during which the vehicle is currently driving at a speed less than or equal to a preset speed threshold.

[0162] In step S302, determining whether the first driving duration is less than the first preset duration threshold;

[0163] If the first driving duration is less than the first preset duration threshold, executing step S303;

[0164] When the first driving duration is greater than or equal to the first preset duration threshold, step S304 is executed.

[0165] In step S303, the first preset output power is used as a candidate output power of the fuel cell.

[0166] In step S304 , it is determined whether the first driving duration is less than a second preset duration threshold.

[0167] If the first driving duration is less than the second preset duration threshold, executing step S305;

[0168] When the first driving duration is greater than or equal to the second preset duration threshold, steps S306 to S309 are executed.

[0169] In step S305 , the first average power is used as a candidate output power of the fuel cell.

[0170] In step S306, a second average power of the vehicle demand power within a second preset historical time period is obtained, wherein the second preset historical time period is a time period between a first designated historical moment and a second designated historical moment, and the second designated historical moment is earlier than the first designated historical moment.

[0171] In step S307 , the difference between the first average power and the second average power is calculated.

[0172] In step S308 , it is determined whether the difference is less than a preset power difference threshold.

[0173] If the difference is less than the preset power difference threshold, executing step S309;

[0174] If the difference is greater than or equal to the preset power difference threshold, executing step S310;

[0175] In step S309 , the second average power is used as a candidate output power of the fuel cell.

[0176] In step S310, the first average power is used as a candidate output power of the fuel cell.

[0177] In step S311 , it is determined whether the second driving duration is less than the third preset duration threshold.

[0178] The second driving duration is the duration during which the vehicle is currently driving at a speed less than or equal to a preset speed threshold.

[0179] If the second driving duration is greater than or equal to the third preset duration threshold, executing step S312;

[0180] If the second driving duration is less than the third preset duration threshold, executing step S303;

[0181] In step S312, the minimum output power of the fuel cell is used as the candidate output power of the fuel cell.

[0182] Case 2, referring to FIG. 4 , in some embodiments, for a case where the SOC value is less than the second preset SOC value and greater than or equal to the third preset SOC value, the following steps may be included:

[0183] In step S400, the second driving duration is obtained.

[0184] In step S401 , it is determined whether the first driving duration is less than a first preset duration threshold.

[0185] If the first driving duration is less than the first preset duration threshold, executing step S402;

[0186] When the first driving duration is greater than or equal to the first preset duration threshold, steps S403 to S406 are executed.

[0187] In step S402, the second preset output power is used as a candidate output power of the fuel cell.

[0188] In step S403 , a target SOC range corresponding to the SOC value is determined from a plurality of preset SOC ranges.

[0189] In step S404, the first compensation power is determined according to the target SOC range through a preset power compensation correspondence.

[0190] The power compensation correspondence includes the compensation power corresponding to each preset SOC value range.

[0191] In step S405 , the first average power is compensated according to the first compensation power to obtain a first target power.

[0192] In step S406 , the first target power is used as a candidate output power of the fuel cell.

[0193] In step S407 , it is determined whether the second driving duration is less than a third preset duration threshold.

[0194] If the second driving duration is greater than or equal to the third preset duration threshold, executing step S408;

[0195] If the second driving duration is less than the third preset duration threshold, executing step S402;

[0196] In step S408 , the product of the rated output power of the fuel cell and the preset ratio is used as the candidate output power of the fuel cell.

[0197] The preset ratio can be determined by:

[0198] The ratio of the output power of the fuel cell when the efficiency is the highest to the rated power of the fuel cell is used as the preset ratio.

[0199] Case 3, referring to FIG. 5 , in another embodiment, for a case where the SOC value is less than the third preset SOC value, the following steps may be included:

[0200] In step S500, the second driving duration is obtained.

[0201] In step S501 , it is determined whether the first driving duration is less than the first preset duration threshold.

[0202] If the first driving duration is less than the first preset duration threshold, executing step S502;

[0203] When the first driving duration is greater than or equal to the first preset duration threshold, step S503 is executed.

[0204] In step S502, the fourth preset output power is used as a candidate output power of the fuel cell.

[0205] In step S503 , it is determined whether the first driving duration is less than a second preset duration threshold.

[0206] If the first driving duration is greater than or equal to the second preset duration threshold, executing steps S504 to S506;

[0207] When the first driving duration is less than the second preset duration threshold, steps S507 to S509 are executed.

[0208] In step S504, it is determined whether the first average power is less than or equal to the second average power.

[0209] If the first average power is less than or equal to the second average power, executing step S505;

[0210] If the first average power is greater than the second average power, executing step S506;

[0211] In step S505 , the second average power is used as a candidate output power of the fuel cell.

[0212] In step S506, the first average power is used as a candidate output power of the fuel cell.

[0213] In step S507 , a second compensation power is determined according to the SOC value.

[0214] In step S508, the second compensation power is used to compensate the first average power to obtain a second target power.

[0215] In step S509 , the second target power is used as a candidate output power of the fuel cell.

[0216] In step S510 , it is determined whether the second driving duration is less than the third preset duration threshold.

[0217] If the second driving duration is less than the third preset duration threshold, executing step S502;

[0218] If the second driving duration is greater than or equal to the third preset duration threshold, executing step S511;

[0219] In step S511 , the first average power is used as a candidate output power of the fuel cell.

[0220] By adopting the above scheme, the output power of the fuel cell is controlled by different SOC values ​​and vehicle driving conditions, which improves the adaptability of the vehicle fuel cell power output to working conditions and increases the cruising range of the entire vehicle.

[0221] Fig. 6 is a block diagram of a device for determining output power according to an exemplary embodiment. Referring to Fig. 6 , the device 600 includes: a first acquisition module 601 , a second acquisition module 602 , a first determination module 603 , and a second determination module 604 .

[0222] The first acquisition module 601 is used to obtain the state of charge (SOC) value of the vehicle's power battery;

[0223] The second acquisition module 602 is configured to acquire a driving speed of the vehicle and a first driving duration of the vehicle, where the first driving duration is a duration during which the vehicle is currently driving at a speed greater than a preset speed threshold;

[0224] The first determining module 603 is configured to determine a candidate output power of a fuel cell of the vehicle according to the SOC value and the first driving duration;

[0225] The second determining module 604 is configured to use the minimum power among the candidate output power of the fuel cell, the maximum charging power of the power battery, and the maximum output power of the fuel cell as the target output power of the fuel cell.

[0226] FIG7 is a block diagram of a first determination module provided according to the embodiment shown in FIG6 . As shown in FIG7 , the first determination module 603 includes:

[0227] A first acquisition submodule 6031 is configured to acquire, when the SOC value is less than a first preset SOC value, a first average power of the vehicle demand power within a first preset historical time period, where the first preset historical time period is a time period between the current moment and a first specified historical moment;

[0228] The first determining submodule 6032 is configured to determine a candidate output power of the fuel cell based on the first driving duration, the first average power, and a second driving duration, wherein the second driving duration is a duration during which the vehicle is currently driving at a speed less than or equal to a preset speed threshold; or

[0229] The second determining submodule 6033 is configured to use the fourth preset output power as the candidate output power of the fuel cell when the SOC value is greater than or equal to the first preset SOC value.

[0230] Optionally, the first determining submodule 6032 is configured to determine, when the SOC value is less than the first preset SOC value and greater than or equal to a second preset SOC value, that the first preset SOC value is greater than the second preset SOC value;

[0231] In the case where the first driving duration is greater than or equal to a first preset duration threshold and less than a second preset duration threshold, the first average power is used as a candidate output power of the fuel cell; or

[0232] When the first driving duration is greater than or equal to a second preset duration threshold, a second average power of the vehicle demand power within a second preset historical time period is obtained; a difference between the first average power and the second average power is calculated, and a candidate output power of the fuel cell is determined according to the difference; the second preset historical time period is a time period between a first designated historical moment and a second designated historical moment, and the second designated historical moment is earlier than the first designated historical moment; or,

[0233] If the second driving duration is less than or equal to a third preset duration threshold, the minimum output power of the fuel cell is used as the candidate output power of the fuel cell, and the second driving duration is the duration during which the vehicle is currently driving at a speed less than or equal to the preset speed threshold; or

[0234] When the first driving duration is less than the first preset duration threshold, or the second driving duration is less than the third preset duration threshold, the first preset output power is used as the candidate output power of the fuel cell.

[0235] Optionally, the first determination submodule 6032 is used to use the second average power as the candidate output power of the fuel cell when the difference is less than a preset power difference threshold; or to use the first average power as the candidate output power of the fuel cell when the difference is greater than or equal to the preset power difference threshold.

[0236] Optionally, the first determining submodule 6032 is further configured to, when the SOC value is less than the second preset SOC value and greater than or equal to a third preset SOC value, and the second preset SOC value is greater than the third preset SOC value, and if the first driving duration is greater than or equal to the first preset duration threshold, determine a first compensation power according to the SOC value, compensate the first average power according to the first compensation power to obtain a first target power, and use the first target power as a candidate output power of the fuel cell; or

[0237] If the second driving duration is less than the third preset duration threshold, or the first driving duration is less than the first preset duration threshold, the second preset output power is used as the candidate output power of the fuel cell; or

[0238] If the second driving duration is greater than or equal to the third preset duration threshold, the third preset output power is used as the candidate output power of the fuel cell.

[0239] Optionally, the first determining submodule 6032 is configured to determine a target SOC range corresponding to the SOC value from a plurality of preset SOC ranges;

[0240] According to the target SOC range, the first compensation power is determined by a preset power compensation correspondence relationship, where the power compensation correspondence relationship includes compensation powers corresponding to each preset SOC value range.

[0241] Optionally, the first determining submodule 6032 is configured to, when the SOC value is less than the third preset SOC value,

[0242] If the first driving duration is greater than or equal to a first preset duration threshold and less than a second preset duration threshold, determining a second compensation power according to the SOC value, compensating the first average power according to the second compensation power to obtain a second target power, and using the second target power as a candidate output power of the fuel cell; or

[0243] If the first driving duration is greater than or equal to a second preset duration threshold, determining a candidate output power of the fuel cell according to the first average power and the second average power; or

[0244] If the second driving duration is greater than or equal to a third preset duration threshold, the first average power is used as the candidate output power of the fuel cell; or

[0245] If the first driving duration is less than the first preset duration threshold, or the second driving duration is less than the third preset duration threshold, the fourth preset output power is used as the candidate output power of the fuel cell.

[0246] Optionally, the first determining submodule 6032 is configured to, when the first average power is less than or equal to the second average power, use the second average power as the candidate output power of the fuel cell; or

[0247] When the first average power is greater than the second average power, the first average power is used as the candidate output power of the fuel cell.

[0248] By adopting the above-mentioned device, the vehicle can adapt to different SOC ranges and driving conditions to determine the target output power of the fuel cell, thereby reducing the use of the fuel cell when the power battery power is very high, reducing the load frequency of the fuel cell while meeting the vehicle's power requirements when the power battery power is relatively high, reducing the use of the fuel cell and improving the working efficiency of the fuel cell when the power battery power is relatively low, and reducing the use of the power battery when the power battery power is very low, thereby improving the vehicle's cruising range and reducing the hydrogen consumption of the fuel cell.

[0249] FIG8 is a block diagram of an electronic device 800 according to an exemplary embodiment of the present disclosure. As shown in FIG8 , the electronic device 800 may include a processor 801 and a memory 802. The electronic device 800 may also include one or more of a multimedia component 803, an input / output (I / O) interface 804, and a communication component 805.

[0250] The processor 801 is used to control the overall operation of the electronic device 800 to complete all or part of the steps in the above-mentioned method for determining the output power. The memory 802 is used to store various types of data to support the operation of the electronic device 800. For example, this data may include instructions for any application or method operating on the electronic device 800, as well as application-related data, such as contact information, sent and received messages, pictures, audio, video, etc. The memory 802 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The multimedia component 803 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in the memory 802 or transmitted via the communication component 805. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 804 provides an interface between the processor 801 and other interface modules. The aforementioned other interface modules may be a keyboard, a mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 805 is used for wired or wireless communication between the electronic device 800 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more thereof, is not limited here. Therefore, the corresponding communication component 805 may include: a Wi-Fi module, a Bluetooth module, an NFC module, etc.

[0251] In an exemplary embodiment, the electronic device 800 can be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-mentioned method for determining the output power.

[0252] In another exemplary embodiment, a computer-readable storage medium including program instructions is further provided. When executed by a processor, the program instructions implement the steps of the above-described method for determining output power. For example, the computer-readable storage medium may be the aforementioned memory 802 including the program instructions. The program instructions may be executed by the processor 801 of the electronic device 800 to implement the above-described method for determining output power.

[0253] Figure 9 is a block diagram of a vehicle 900 provided according to an exemplary embodiment of the present disclosure, wherein the vehicle 900 includes a power battery 901, a fuel cell 902, and the output power determination device 600 of the above embodiment, wherein the power battery 901 and the fuel cell 902 are respectively connected to the output power determination device 600.

[0254] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0255] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0256] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A method for determining output power, characterized in that: The method comprises: Obtain the state of charge (SOC) value of the vehicle's power battery; Acquire the driving speed of the vehicle and a first driving duration of the vehicle, wherein the first driving duration is the duration of the vehicle's current continuous driving at a speed greater than a preset speed threshold; determining a candidate output power of a fuel cell of the vehicle according to the SOC value and the first driving duration; The minimum power among the candidate output power of the fuel cell, the maximum charging power of the power battery and the maximum output power of the fuel cell is used as the target output power of the fuel cell.

2. The method according to claim 1, characterized in that The determining, according to the SOC value and the first driving duration, a candidate output power of the fuel cell of the vehicle comprises: When the SOC value is less than a first preset SOC value, obtaining a first average power of the vehicle demand power within a first preset historical time period, wherein the first preset historical time period is a time period between the current moment and a first specified historical moment; determining a candidate output power of the fuel cell according to the first driving duration, the first average power, and a second driving duration, wherein the second driving duration is a duration during which the vehicle is currently driving at a speed less than or equal to a preset speed threshold; or When the SOC value is greater than or equal to the first preset SOC value, a fourth preset output power is used as a candidate output power of the fuel cell.

3. The method according to claim 2, characterized in that The determining the candidate output power of the fuel cell according to the first driving duration, the first average power, and the second driving duration includes: In the case where the SOC value is less than the first preset SOC value and greater than or equal to a second preset SOC value, the first preset SOC value is greater than the second preset SOC value, If the first driving duration is greater than or equal to a first preset duration threshold and less than a second preset duration threshold, the first average power is used as a candidate output power of the fuel cell; or, If the first driving duration is greater than or equal to a second preset duration threshold, a second average power of the vehicle demand power within a second preset historical time period is obtained; a difference between the first average power and the second average power is calculated, and a candidate output power of the fuel cell is determined according to the difference; the second preset historical time period is a time period between a first designated historical moment and a second designated historical moment, and the second designated historical moment is earlier than the first designated historical moment; or, If the second driving duration is greater than or equal to the third preset duration threshold, the minimum output power of the fuel cell is used as the candidate output power of the fuel cell; or, If the first driving duration is less than the first preset duration threshold, or the second driving duration is less than the third preset duration threshold, the first preset output power is used as the candidate output power of the fuel cell.

4. The method according to claim 3, characterized in that Determining the candidate output power of the fuel cell of the vehicle according to the difference comprises: When the difference is less than a preset power difference threshold, taking the second average power as the candidate output power of the fuel cell; or, When the difference is greater than or equal to the preset power difference threshold, the first average power is used as the candidate output power of the fuel cell.

5. The method according to claim 3, characterized in that: The determining the candidate output power of the fuel cell according to the first driving duration, the first average power, and the second driving duration further includes: When the SOC value is less than the second preset SOC value and greater than or equal to a third preset SOC value, the second preset SOC value is greater than the third preset SOC value; If the first driving duration is greater than or equal to the first preset duration threshold, a first compensation power is determined according to the SOC value, and the first average power is compensated according to the first compensation power to obtain a first target power, and the first target power is used as a candidate output power of the fuel cell; or, If the second driving duration is less than the third preset duration threshold, or the first driving duration is less than the first preset duration threshold, the second preset output power is used as the candidate output power of the fuel cell; or, If the second driving time is greater than or equal to the third preset time threshold, the third preset output power is used as the candidate output power of the fuel cell.

6. The method according to claim 5, characterized in that Determining the first compensation power according to the SOC value includes: Determining a target SOC range corresponding to the SOC value from a plurality of preset SOC ranges; According to the target SOC range, the first compensation power is determined by a preset power compensation correspondence relationship, and the power compensation correspondence relationship includes the compensation power corresponding to each preset SOC value range.

7. The method according to claim 3, characterized in that The step of determining the candidate output power of the fuel cell according to the first driving duration, the first average power, and the second driving duration further includes: When the SOC value is less than the third preset SOC value, If the first driving duration is greater than or equal to a first preset duration threshold and less than a second preset duration threshold, a second compensation power is determined according to the SOC value, and the first average power is compensated according to the second compensation power to obtain a second target power, and the second target power is used as a candidate output power of the fuel cell; or If the first driving duration is greater than or equal to a second preset duration threshold, determining the candidate output power of the fuel cell according to the first average power and the second average power; or, If the second driving duration is greater than or equal to a third preset duration threshold, the first average power is used as the candidate output power of the fuel cell; or, If the first driving duration is less than the first preset duration threshold, or the second driving duration is less than the third preset duration threshold, the fourth preset output power is used as the candidate output power of the fuel cell.

8. The method according to claim 7, characterized in that The determining the candidate output power of the fuel cell according to the first average power and the second average power comprises: When the first average power is less than or equal to the second average power, taking the second average power as the candidate output power of the fuel cell; or, When the first average power is greater than the second average power, the first average power is used as a candidate output power of the fuel cell.

9. A device for determining output power, characterized in that: The method comprises: A first acquisition module, used to acquire a state of charge (SOC) value of a power battery of a vehicle; A second acquisition module is used to acquire the driving speed of the vehicle and a first driving duration of the vehicle, wherein the first driving duration is the duration of the vehicle's current continuous driving at a speed greater than a preset speed threshold; A first determination module, configured to determine a candidate output power of a fuel cell of the vehicle according to the SOC value, the driving speed, and the first driving duration; The second determination module is used to determine the target output power of the fuel cell according to the candidate output power of the fuel cell, the maximum charging power of the power battery and the maximum output power of the fuel cell.

10. A vehicle, characterized in that: It comprises a power battery, a fuel cell and the output power determination device according to claim 9, wherein the power battery and the fuel cell are respectively connected to the output power determination device.

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