Energy management method and system of fuel cell vehicle and vehicle

Abstract

The invention provides an energy management method and system of a fuel cell vehicle and the vehicle, and relates to the technical field of vehicles. The method comprises the following steps: acquiring vehicle operation analysis data of a fuel cell vehicle; the driving power of the driving motor is calculated according to the bus voltage of the driving motor, the bus current accelerator opening degree information and the vehicle slope information; calculating the energy consumption power of other energy consumption systems according to the bus voltage of the power battery and the energy consumption information of other energy consumption systems; according to the vehicle running mode, the driving power correction coefficient and other power correction coefficients, the driving power and the energy consumption power of the driving motor are subjected to weighted correction, and the target vehicle demand power is determined; according to the current charge state value of the power battery, the target vehicle demand power and the vehicle driving mode, the electric pile demand power of the fuel battery is determined; and controlling the fuel cell to output power according to the required power of the electric pile. Therefore, the vehicle runs more efficiently, and the running cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to an energy management method, system and vehicle for a fuel cell vehicle. Background Art

[0002] Fuel cell trucks are an important technology developed by the automotive industry to achieve energy conservation goals. Fuel cell trucks have two energy systems: power batteries and fuel cell systems. However, fuel cell systems have problems such as long response time, sensitivity to ambient temperature, and frequent and rapid load changes that seriously affect the life of fuel cells. Trucks have problems such as variable operating conditions and driver behavior. Therefore, the superposition of problems on both the fuel cell system and the truck results in low operating efficiency and high operating costs for fuel cell trucks, which also affects the life of the fuel cell. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies in the above-mentioned prior art and provide an energy management method, system and vehicle for a fuel cell vehicle to solve the problems of low operating efficiency of fuel cell trucks in the prior art.

[0004] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows: In a first aspect, an embodiment of the present application provides an energy management method for a fuel cell vehicle, which is applied to a control device of the fuel cell vehicle, and the method includes: Acquiring vehicle operation analysis data of the fuel cell vehicle, the vehicle operation analysis data including: a driving power correction coefficient and other power correction coefficients; Calculating the driving power of the driving motor according to the bus voltage and bus current of the driving motor on the fuel cell vehicle, the throttle opening information of the fuel cell vehicle, and the vehicle slope information of the fuel cell vehicle; Calculating the energy consumption power of the other energy consumption systems according to the bus voltage of the power battery on the fuel cell vehicle and the energy consumption information of the other energy consumption systems; According to the vehicle driving mode of the fuel cell vehicle, the driving power correction coefficient and the other power correction coefficient, weighted correction is performed on the driving power of the driving motor and the energy consumption power to determine the target vehicle demand power of the fuel cell vehicle; Determining the required power of the fuel cell stack on the fuel cell vehicle according to the current state of charge value of the power battery on the fuel cell vehicle, the required power of the target vehicle, and the vehicle driving mode; According to the power demand of the fuel cell stack, the fuel cell is controlled to output power.

[0005] Optionally, the calculating the driving power of the driving motor according to the bus voltage and bus current of the driving motor on the fuel cell vehicle, the throttle opening information of the fuel cell vehicle and the vehicle slope information of the fuel cell vehicle comprises: Calculating the actual power of the drive motor on the fuel cell vehicle according to the bus voltage and bus current of the drive motor; Calculating the corrected power of the drive motor according to the throttle opening information and the vehicle slope information; The driving power of the driving motor is calculated according to the actual power and the corrected power of the driving motor.

[0006] Optionally, the other energy-consuming systems include: an air-conditioning system, a steering system, a braking system and an on-board low-voltage system, and the energy consumption information of the other energy-consuming systems includes: an energy consumption current of the air-conditioning system, an energy consumption current of the steering system, an energy consumption current of the braking system and an energy consumption current of the on-board low-voltage system; the energy consumption power of the other energy-consuming systems is calculated according to the bus voltage of the power battery on the fuel cell vehicle and the energy consumption information of the other energy-consuming systems, including: The energy consumption power of the other energy consumption systems is calculated according to the bus voltage of the power battery, the energy consumption current of the air conditioning system, the energy consumption current of the steering system, the energy consumption current of the braking system and the energy consumption current of the on-board low-voltage system.

[0007] Optionally, determining the required power of the fuel cell stack on the fuel cell vehicle according to the current state of charge value of the power battery on the fuel cell vehicle, the required power of the target vehicle, and the vehicle driving mode includes: If the target vehicle's required power is greater than the fuel cell stack output power, determining the maximum output power of the fuel cell as the stack required power; If the target vehicle required power is less than or equal to the stack output power of the fuel cell, the most efficient output power of the fuel cell is determined as the stack required power.

[0008] Optionally, the vehicle operation analysis data further includes: a state of charge correction coefficient and a vehicle operation condition type; and the method further includes: Correcting the target state of charge value of the power battery according to the state of charge correction coefficient; According to the vehicle operating condition type, a target operating condition of the fuel cell vehicle is determined, and the target operating condition is used to indicate whether the fuel cell vehicle is in a heavy-load short-distance transportation condition.

[0009] Optionally, before controlling the fuel cell to output power according to the power demand of the fuel cell stack, the method further includes: The stack power requirement of the fuel cell at the current moment is filtered based on the historical stack power requirement of the fuel cell at multiple historical moments within a preset power speed change interval and the weighted values ​​corresponding to the multiple historical moments.

[0010] Optionally, the vehicle operation analysis data further includes: optimal energy recovery gear information; the method further includes: Calculating the required torque of the drive motor according to the current operating mode of the drive motor on the fuel cell vehicle, wherein the current operating mode is: starting mode, creeping mode, throttle driving mode, cruise control mode, brake energy recovery mode, or vehicle limp mode; Correcting the required torque according to the optimal energy recovery gear information; According to a preset weight parameter, a weighted calculation is performed on the corrected demand torque at the current moment and the historical demand torque at a preset historical moment to obtain a target torque of the drive motor; The drive motor is controlled according to the target torque.

[0011] Optionally, the calculating the required torque of the drive motor according to the current operation mode of the drive motor on the fuel cell vehicle includes: If the current operation mode is the start-up mode, a high-voltage self-test is performed on the power battery and the fuel cell, and when the fuel cell vehicle is in a stationary state, the required torque is determined to be a preset minimum torque; If the current operation mode is the creep mode, the required torque is calculated according to the sum of the initial torque and the feedback torque of the drive motor, the initial torque being the torque for the vehicle to creep at a preset creep target speed when the vehicle is unloaded, and the feedback torque being the real-time feedback torque calculated from the difference between the current vehicle speed and the creep target speed; If the current operation mode is the throttle drive mode, the required torque is calculated according to the preset maximum torque of the drive motor of the fuel cell vehicle in the current loading mode and the throttle opening information, and the current loading mode is: no-load mode, half-load mode or full-load mode; If the current operating mode is a cruise control mode, the required torque is calculated according to a deviation between a current vehicle speed of the fuel cell vehicle and a preset cruise speed; If the current operation mode is the braking energy recovery mode, the required torque is obtained by looking up a table according to the current vehicle speed and brake opening information of the fuel cell vehicle, or the required torque is obtained by looking up a table according to the current vehicle speed and a preset energy recovery gear of the fuel cell vehicle; If the current operating mode is the vehicle limp home mode, the required torque is calculated based on the current vehicle speed of the fuel cell vehicle, a preset maximum vehicle speed, a preset maximum torque of the drive motor, and a real-time rotation speed.

[0012] In a second aspect, an embodiment of the present application provides an energy management system for a fuel cell vehicle, the energy management system comprising: a control device, a power battery, a fuel cell, a drive motor control system, a gearbox control system, and other energy consumption systems; The control device is respectively connected to the power battery, the fuel cell, the drive motor control system, the gearbox control system, and the other energy-consuming systems, and the control device is used to execute any energy management method described in the first aspect above.

[0013] In a third aspect, an embodiment of the present application provides a fuel cell vehicle, comprising: a vehicle body, and the energy management system described in the second aspect above, which is arranged on the vehicle body.

[0014] Compared with the prior art, this application has the following beneficial effects: The present application provides an energy management method, system and vehicle for a fuel cell vehicle. The method obtains vehicle operation analysis data of a fuel cell vehicle, and the vehicle operation analysis data includes: a driving power correction coefficient and other power correction coefficients; the driving power of the driving motor is calculated according to the bus voltage and bus current of the driving motor on the fuel cell vehicle, the throttle opening information of the fuel cell vehicle and the vehicle slope information of the fuel cell vehicle; the energy consumption power of other energy consumption systems is calculated according to the bus voltage of the power battery on the fuel cell vehicle and the energy consumption information of other energy consumption systems; the driving power and energy consumption power of the driving motor are weightedly corrected according to the vehicle driving mode of the fuel cell vehicle, the driving power correction coefficient and other power correction coefficients, and the target vehicle demand power of the fuel cell vehicle is determined; the stack demand power of the fuel cell on the fuel cell vehicle is determined according to the current state of charge value of the power battery on the fuel cell vehicle, the target vehicle demand power and the vehicle driving mode; the fuel cell is controlled to output power according to the stack demand power. Thus, while ensuring the vehicle driving power demand, the fuel cell power generation and the output power of the driving motor are reasonably controlled, so that the vehicle operation is more efficient, the operating cost is reduced, and the life of the fuel cell is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic diagram of the structure of an energy management system for a fuel cell vehicle provided in an embodiment of the present application; Figure 2 A schematic diagram of a flow chart of an energy management method for a fuel cell vehicle provided in the present application; Figure 3 A schematic flow chart of a method for calculating the driving power of a driving motor is also provided in an embodiment of the present application; Figure 4 A flowchart of a method for determining the power requirement of a fuel cell stack is also provided in an embodiment of the present application; Figure 5 A schematic flow chart of another energy management method for a fuel cell vehicle provided in an embodiment of the present application; Figure 6 A schematic flow chart of another energy management method for a fuel cell vehicle provided in an embodiment of the present application; Figure 7 A schematic flow chart of a method for calculating a required torque of a driving motor is also provided in an embodiment of the present application; Figure 8 A schematic diagram of an energy management device for a fuel cell vehicle provided in an embodiment of the present application; Fig. 9 A schematic diagram of a control device provided in an embodiment of the present application.

[0017] Icons: 1-control device, 2-power battery, 3-fuel cell, 4-drive motor control system, 5-gearbox control system, 6-other energy consumption systems, 801-acquisition module, 802-first calculation module, 803-second calculation module, 804-first determination module, 805-second determination module, 806-control module, 901-processor, 902-storage medium. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0021] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0022] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0023] The energy management system used in the energy management method for a fuel cell vehicle provided in the present application is introduced below through specific examples. Figure 1 This is a schematic diagram of the structure of an energy management system for a fuel cell vehicle provided in an embodiment of the present application. Figure 1 As shown, the energy management system includes: a control device 1, a power battery 2, a fuel cell 3, a drive motor control system 4, a gearbox control system 5, and other energy consumption systems 6.

[0024] The control device 1 is respectively connected to the power battery 2, the fuel cell 3, the drive motor control system 4, the gearbox control system 5, and other energy-consuming systems 6, and the control device is used to execute any energy management method provided in this application.

[0025] The control device 1 is a central controller or a vehicle controller of the vehicle, or other controllers with control functions. The control device 1 is also connected to the data analysis platform for communication to obtain vehicle data issued by the data analysis platform, and the data analysis platform can be an intelligent network platform.

[0026] The power battery 2 includes a power battery management system and a power battery, which respectively manage the vehicle power battery and provide energy supply for the vehicle.

[0027] The fuel cell 3 may be a hydrogen fuel cell or other fuel cells, such as a methane fuel cell, etc. If the fuel cell 3 is a hydrogen fuel cell, it includes a hydrogen fuel cell controller, a hydrogen bottle controller, a hydrogen fuel cell and a hydrogen bottle, which respectively control the hydrogen fuel cell and the hydrogen bottle and provide energy supply for the vehicle.

[0028] The drive motor control system 4 controls the drive motor, and the drive motor provides driving force to drive the vehicle.

[0029] The control system 5 of the gearbox controls the gearbox, and the gearbox increases torque and reduces speed of the driving force from the motor.

[0030] Other energy-consuming systems 6 include vehicle cab air conditioning, vehicle steering assist system, brake assist system, and vehicle lighting system, which respectively perform cab environment adjustment, vehicle steering and braking assistance, and vehicle driving assistance, etc.

[0031] In the above Figure 1 On the basis of the corresponding embodiments, the present application further provides a fuel cell vehicle. The fuel cell vehicle comprises: a vehicle body, and an energy management system provided by the present application and arranged on the vehicle body.

[0032] The energy management method for a fuel cell vehicle provided in the present application is explained below through a specific example. Figure 2 The present application provides a schematic flow chart of a fuel cell vehicle energy management method, the method is performed by a fuel cell vehicle control device, and the control device has a computing and processing function. Figure 2 As shown, the method includes: S101. Obtain vehicle operation analysis data of a fuel cell vehicle.

[0033] Among them, vehicle operation analysis data includes: driving power correction coefficient and other power correction coefficient.

[0034] The drive power correction coefficient is used to correct the drive power. According to the distribution of the drive motor operating point in the motor efficiency MAP, the drive motor system MAP of the vehicle selection is divided into three areas: low efficiency area AL, general area AM, and high efficiency area AH.

[0035] The specific calculation and analysis method is shown in the following formula (1): (1) in, is the driving power correction coefficient, T(i) is the driving torque during the operation of the driving motor, n(i) is the actual speed during the operation of the driving motor, is the DC bus voltage of the drive motor, is the DC bus current driving the motor, is the weight of the inefficient area AL, is the weight of AM in the general area, is the weight of AH in the high-efficiency zone.

[0036] Other power correction factors are used to correct other powers.

[0037] The calculation and analysis method of other power correction factors is shown in the following formula (2): (2) in, is other power correction factor, and are the bus voltage and bus current in battery discharge mode, and are the power generation voltage and current of the fuel cell, and They are the bus voltage and bus current when the drive motor consumes power, For other powers.

[0038] For example, in order to calculate accurately, the operation data of the vehicle operation for at least 1000 km is selected for the above calculation.

[0039] S102, calculating the driving power of the driving motor according to the bus voltage and bus current of the driving motor on the fuel cell vehicle, the throttle opening information of the fuel cell vehicle, and the vehicle slope information of the fuel cell vehicle.

[0040] The bus voltage and bus current can directly represent the driving power of the driving motor. The driving power can be corrected by the throttle opening information and the vehicle slope information of the fuel cell vehicle to obtain a more accurate driving power.

[0041] S103, calculating the energy consumption power of other energy consumption systems according to the bus voltage of the power battery on the fuel cell vehicle and the energy consumption information of other energy consumption systems.

[0042] Other energy consumption systems refer to other energy consumption systems on the vehicle except the drive motor. The driving power of the drive motor and the energy consumption power of other energy consumption systems can together represent the total energy consumption power of the vehicle.

[0043] S104, performing weighted correction on the driving power and energy consumption power of the driving motor according to the vehicle driving mode, driving power correction coefficient and other power correction coefficients of the fuel cell vehicle, and determining the target vehicle required power of the fuel cell vehicle.

[0044] The target vehicle required power is calculated as shown in the following formula (3): (3) Among them, the target vehicle required power is , the driving power is , the energy consumption is The vehicle driving mode is , where the drive mode is , the vehicle electric braking mode is , the vehicle parking waiting mode is The vehicle driving mode can be determined based on information such as vehicle speed and gear position.

[0045] The driving power and energy consumption power are fully considered, and the driving power correction factor and other power correction factors are used for modification, so that the calculation of the required power of the target vehicle is more accurate.

[0046] Furthermore, before S104, the vehicle driving mode is determined according to the vehicle speed information, gear information and brake opening information of the fuel cell vehicle, wherein the vehicle driving mode is a driving mode, an electric braking mode or a parking waiting mode.

[0047] S105 . Determine the required power of the fuel cell stack on the fuel cell vehicle according to the current state of charge value of the power battery on the fuel cell vehicle, the required power of the target vehicle, and the vehicle driving mode.

[0048] In order to ensure that the functional systems inside the vehicle operate in the most efficient way, in addition to the fuel cell on the vehicle, it is also necessary to consider the power battery on the vehicle so that the fuel cell and the power battery can be combined with each other to determine the required power of the fuel cell stack on the vehicle.

[0049] S106. Control the fuel cell to output power according to the power required by the fuel cell stack.

[0050] The power output of the fuel cell is controlled by the power required by the stack. Thus, while ensuring the power demand of the vehicle, the power generation power of the fuel cell and the output power of the drive motor are reasonably controlled, making the vehicle operation more efficient and reducing the operating cost.

[0051] In summary, in this embodiment, the vehicle operation analysis data of the fuel cell vehicle is obtained, and the vehicle operation analysis data includes: driving power correction coefficient, other power correction coefficient; according to the bus voltage and bus current of the driving motor on the fuel cell vehicle, the throttle opening information of the fuel cell vehicle and the vehicle slope information of the fuel cell vehicle, the driving power of the driving motor is calculated; according to the bus voltage of the power battery on the fuel cell vehicle and the energy consumption information of other energy-consuming systems, the energy consumption power of other energy-consuming systems is calculated; according to the vehicle driving mode of the fuel cell vehicle, the driving power correction coefficient and other power correction coefficients, the driving power and energy consumption power of the driving motor are weighted and corrected to determine the target vehicle demand power of the fuel cell vehicle; according to the current state of charge value of the power battery on the fuel cell vehicle, the target vehicle demand power, and the vehicle driving mode, the stack demand power of the fuel cell on the fuel cell vehicle is determined; according to the stack demand power, the fuel cell is controlled to output power. Thus, while ensuring the vehicle driving power demand, the fuel cell power generation and the output power of the driving motor are reasonably controlled, so that the vehicle operation is more efficient, the operation cost is reduced, and the life of the fuel cell is extended.

[0052] In the above Figure 2 On the basis of the corresponding embodiments, the embodiments of the present application further provide a method for calculating the driving power of a driving motor. Figure 3 The present invention also provides a flow chart of a method for calculating the driving power of a driving motor. Figure 3 As shown, in S102, the driving power of the driving motor is calculated according to the bus voltage and bus current of the driving motor on the fuel cell vehicle, the throttle opening information of the fuel cell vehicle, and the vehicle slope information of the fuel cell vehicle, including: S201. Calculate the actual power of the drive motor on the fuel cell vehicle according to the bus voltage and bus current of the drive motor.

[0053] The specific calculation method of the actual power of the drive motor is shown in the following formula (4): (4) in, is the actual torque bus voltage of the driving motor, is the actual torque bus current of the driving motor. bus When it is greater than 0, the drive motor is in energy consumption mode; when I bus When it is greater than 0, the drive motor is in energy recovery mode.

[0054] S202: Calculate the corrected power of the drive motor according to the throttle opening information and the vehicle slope information.

[0055] The specific calculation method of the corrected power of the drive motor is shown in the following formula (5): (5) in, is the throttle opening information, θ is the vehicle slope information, is the throttle weight, is the slope weight.

[0056] S203: Calculate the driving power of the driving motor according to the actual power and the corrected power of the driving motor.

[0057] The driving power is calculated based on the actual power of the motor and the corrected power according to the working conditions. The specific calculation method of the driving power of the driving motor is shown in the following formula (3): (6) in, is the driving power of the driving motor.

[0058] In summary, in this embodiment, the actual power of the drive motor is calculated based on the bus voltage and bus current of the drive motor on the fuel cell vehicle; the corrected power of the drive motor is calculated based on the throttle opening information and the vehicle slope information; and the drive power of the drive motor is calculated based on the actual power and the corrected power of the drive motor. Thus, the drive power is accurately calculated by comprehensively considering the actual power and the corrected power.

[0059] In the above Figure 2 On the basis of the corresponding embodiments, in another embodiment of the present application, other energy-consuming systems include: air-conditioning system, steering system, braking system and vehicle-mounted low-voltage system, and the energy consumption information of other energy-consuming systems includes: energy consumption current of the air-conditioning system, energy consumption current of the steering system, energy consumption current of the braking system and energy consumption current of the vehicle-mounted low-voltage system.

[0060] In S103, the energy consumption power of other energy consumption systems is calculated according to the bus voltage of the power battery on the fuel cell vehicle and the energy consumption information of other energy consumption systems, including: The energy consumption power of other energy-consuming systems is calculated based on the bus voltage of the power battery, the energy consumption current of the air-conditioning system, the energy consumption current of the steering system, the energy consumption current of the braking system and the energy consumption current of the on-board low-voltage system.

[0061] The energy supply of the compressor, heater PTC, steering system and brake system of the vehicle's cab air conditioning system comes directly from the vehicle's high-voltage system. The bus voltage of the vehicle's power battery is set to U bat , set the air conditioner working mode to , when the air conditioner is in cooling mode When the energy consumption current is I AC When the air conditioner is in heating mode When the energy consumption current is , the energy consumption current of the steering system is , the braking system consumes current ; The vehicle thermal management system and other vehicle accessory systems are on-board low-voltage systems. The energy consumption current of the on-board low-voltage system is .

[0062] The specific calculation method of energy consumption is shown in the following formula (7): (7) in, is the energy consumption of other energy consuming systems.

[0063] In summary, in this embodiment, other energy-consuming systems include: air conditioning system, steering system, braking system and vehicle-mounted low-voltage system, and the energy consumption information of other energy-consuming systems includes: energy consumption current of air conditioning system, energy consumption current of steering system, energy consumption current of braking system and energy consumption current of vehicle-mounted low-voltage system; the energy consumption power of other energy-consuming systems is calculated according to the bus voltage of the power battery, energy consumption current of air conditioning system, energy consumption current of steering system, energy consumption current of braking system and energy consumption current of vehicle-mounted low-voltage system. Thus, the energy consumption power of other energy-consuming systems can be accurately calculated.

[0064] In the above Figure 2 On the basis of the corresponding embodiments, the embodiments of the present application also provide a method for determining the power required by a fuel cell stack. Figure 4 The present application also provides a flow chart of a method for determining the power requirement of a fuel cell stack. Figure 4 As shown, in S105, the required power of the fuel cell stack on the fuel cell vehicle is determined according to the current state of charge value of the power battery on the fuel cell vehicle, the required power of the target vehicle, and the vehicle driving mode, including: S301. If the target vehicle's required power is greater than the fuel cell stack output power, determine the maximum output power of the fuel cell as the stack required power.

[0065] If the target vehicle's required power is greater than the stack output power, it means that the target vehicle needs both the fuel cell and the power battery to provide energy, and the power battery is in a discharged state. Therefore, the maximum output power of the fuel cell is determined as the stack required power to increase the stack output power and meet the vehicle's energy needs.

[0066] S302: If the target vehicle's required power is less than or equal to the fuel cell stack output power, determine the most efficient output power of the fuel cell as the stack required power.

[0067] If the target vehicle's required power is less than or equal to the stack output power, it means that the target vehicle only needs the fuel cell to provide energy at the same time, and the power battery is in a charging state. Therefore, the most efficient output power of the fuel cell is determined as the stack's required power. There is no need for the fuel cell to supply energy at the maximum output power, and the most efficient output power is used as the stack's required power to ensure efficient operation of the fuel cell.

[0068] Among them, the preset state of charge upper limit value and the preset state of charge lower limit value are preset values.

[0069] The above steps S301 and S302 are only for illustration and there is no strict sequence.

[0070] In summary, in this embodiment, if the target vehicle power requirement is greater than the fuel cell stack output power, the maximum output power of the fuel cell is determined as the stack power requirement; if the target vehicle power requirement is less than or equal to the fuel cell stack output power, the most efficient output power of the fuel cell is determined as the stack power requirement. Thus, the efficient operation of the fuel cell is ensured while meeting the vehicle energy requirements.

[0071] In the above Figure 2 Based on the corresponding embodiments, the embodiments of the present application also provide another energy management method for a fuel cell vehicle. Figure 5 This is a flow chart of another energy management method for a fuel cell vehicle provided in an embodiment of the present application. The vehicle operation analysis data also includes: state of charge correction coefficient, vehicle operation condition type; Figure 5 As shown, the method also includes: S401 . Correct a target state of charge value of a power battery according to a state of charge correction coefficient.

[0072] The calculation method of the state of charge correction coefficient is shown in the following formula (8): (8) in, is the state of charge correction factor, is the influence coefficient of the vehicle’s total mileage on the correction factor, is the total mileage of the vehicle, is the influence coefficient of the total vehicle operation time on the correction coefficient, is the total operating time, is the influence coefficient of battery health on the correction factor, Is the battery health factor.

[0073] The initial value of the target state of charge (SOC) of the power battery is set according to the power battery installed in the vehicle. IniIt is usually set to 60%. This value ensures that the power battery has good charging and discharging capabilities. The start-stop boundary of the battery stack is set according to the charge state correction factor of the power battery target SOC. After correction, the target SOC of the power battery is changed to SOC Target , after confirming the target SOC data update, the SOC Target Save after power off, and use the saved SOC as the next target SOC when power on next time. Target The calculation formula is shown in formula (9): (9) S402. Determine a target operating condition of the fuel cell vehicle according to the vehicle operating condition type, where the target operating condition is used to indicate whether the fuel cell vehicle is in a heavy-load short-distance transport condition.

[0074] The vehicle operating condition type θ takes values ​​of 1, 2, 3, and 4. The operating condition is mainly confirmed by feature identification and comparison based on the vehicle's operating time, operating location, load, vehicle empty and full load status, slope, average waiting time when empty, and average waiting time when full. Common operating conditions for commercial vehicles are long-distance trunk line transportation conditions, heavy-load short-distance transportation conditions, southwestern mountainous conditions, and comprehensive conditions. The vehicle's operating time, operating location, load, vehicle empty and full load status, slope, average waiting time when empty, and average waiting time when full are calculated during a complete power-on and power-off process, and compared with the characteristics of each operating condition to confirm the vehicle's current operating condition. In this embodiment, when θ=1, it indicates that the operating condition is a long-distance transport condition, which is characterized by transportation on highways; when θ=2, it indicates that the operating condition is a heavy-load short-distance transport condition, and its main feature is a variety of road conditions, including highways and national highways; when θ=3, it indicates that the operating condition is a southwestern mountainous condition, and its main feature is abnormal road loads, including various steep slopes and long slopes; when θ=4, it indicates that the operating condition is a comprehensive condition, and its main feature is a variety of road conditions, including highways and national highways.

[0075] When the operating condition is a heavy-load short-distance transport condition, that is, θ=2, when the vehicle stops, the power generation demand of the fuel cell stack is set according to the most efficient power range of the stack.

[0076] For example, the most efficient power range of the fuel cell stack is set in advance based on the fuel cell and vehicle information.

[0077] In summary, in this embodiment, the vehicle operation analysis data also includes: state of charge correction coefficient, vehicle operation condition type; according to the state of charge correction coefficient, the target state of charge value of the power battery is corrected; according to the vehicle operation condition type, the target operation condition of the fuel cell vehicle is determined, and the target operation condition is used to indicate whether the fuel cell vehicle is in a heavy-load short-distance transportation condition. Thus, the energy management of the vehicle is more accurate.

[0078] For example, the control device needs to reconfirm the calculated state of charge correction factor, vehicle operating condition type, driving power correction factor and other power correction factors. If the above parameters are all within the preset reasonable range, the above parameters are adopted. If the above parameters are not within the preset reasonable range, the vehicle operating condition type is set to 4, and the state of charge correction factor, driving power correction factor and other power correction factors are all set to 1.

[0079] In the above Figure 2 On the basis of the corresponding embodiment, in another embodiment of the present application, before controlling the fuel cell to output power according to the power required by the fuel cell stack in S106, the method further includes: The stack power requirement of the fuel cell at the current moment is filtered according to the historical stack power requirement of the fuel cell at multiple historical moments within a preset power speed change interval and the weighted values ​​corresponding to the multiple historical moments.

[0080] The output power of the stack is filtered according to the variable load characteristics of the stack and the output capacity of the stack. Considering that frequent fluctuations will greatly reduce the life of the fuel cell system, a weighted mean filtering algorithm is designed to filter the required power. T is the preset power speed change interval, the load change rate is set to N kW / s, and the setting is the power requirement of the battery stack after filtering. is the weight of the required power of the battery stack calculated at time (ti), is the power requirement of the battery stack at time (ti). Therefore, the power requirement of the battery stack at time t after weighted mean filtering is as shown in the following formula (10): (10) In summary, in this embodiment, according to the historical stack power requirements of the fuel cell at multiple historical moments within the preset power speed change interval and the weighted values ​​corresponding to the multiple historical moments, the stack power requirements of the fuel cell at the current moment are filtered. Thus, through filtering, the accurate stack power requirements are obtained.

[0081] In the above Figure 2 On the basis of the corresponding embodiments, the embodiments of the present application also provide another energy management method for a fuel cell vehicle. Figure 6This is a flow chart of another energy management method for a fuel cell vehicle provided in an embodiment of the present application. Figure 6 As shown, the vehicle operation analysis data also includes: optimal energy recovery gear information, and the method also includes: S501 . Calculate the required torque of the drive motor according to the current operation mode of the drive motor on the fuel cell vehicle.

[0082] Among them, the current operating mode is: starting mode, creeping mode, throttle drive mode, cruise control mode, brake energy recovery mode, or vehicle limp mode.

[0083] Different operating modes correspond to different required torques of the drive motor.

[0084] S502: Correct the required torque according to the optimal energy recovery gear information.

[0085] When the energy recovery gear is automatic, the vehicle energy recovery torque is calculated based on the analyzed current gear information and the required torque is corrected.

[0086] For example, under normal circumstances, depending on the vehicle model, there are 6 energy recovery gears (0-5), and the larger the gear value, the stronger the energy recovery. In addition, one of the gears (such as 0) will be set as the energy recovery automatic gear. When the energy recovery is in the automatic gear, the preset torque value of the energy recovery torque of 1-5 gears will be automatically matched to 0 gear according to the vehicle operating conditions (mainly the slope and the length of the ramp), so as to correct the required torque and avoid novice drivers adjusting the energy recovery gear back and forth.

[0087] S503 . Perform a weighted calculation on the corrected demand torque at the current moment and the historical demand torque at the preset historical moment according to the preset weight parameter to obtain the target torque of the drive motor.

[0088] Through weighted calculation, the required torque of the drive motor is filtered to ensure smooth torque without sudden changes, thereby ensuring the smoothness of the vehicle when running in different driving modes.

[0089] Torque filtering uses a low-pass filtering algorithm, set It is the torque request sent to the drive motor by the vehicle central controller after filtering. The current motor torque requirement calculated by the vehicle central controller based on driving requirements. is the weight of the motor torque requirement calculated at that time, is the motor torque requirement last calculated by the vehicle central controller, is the weight of the motor torque demand calculated last time, The last motor torque demand calculated by the vehicle central controller, is the weight of the motor torque demand calculated last time, so the weighted calculation method of the target torque is shown in the following formula (11): (11) S504: Control the drive motor according to the target torque.

[0090] In summary, in this embodiment, the vehicle operation analysis data also includes: optimal energy recovery gear information; according to the current operation mode of the drive motor on the fuel cell vehicle, the required torque of the drive motor is calculated, and the current operation mode is: starting mode, creeping mode, throttle drive mode, cruise control mode, brake energy recovery mode, or vehicle limp mode; according to the optimal energy recovery gear information, the required torque is corrected; according to the preset weight parameter, the corrected current moment required torque and the historical required torque at the preset historical moment are weighted to obtain the target torque of the drive motor; according to the target torque, the drive motor is controlled. Thus, the drive motor is controlled by the corrected and filtered torque.

[0091] In the above Figure 6 On the basis of the corresponding embodiments, the embodiments of the present application also provide a method for calculating the required torque of a driving motor. Figure 7 The present application also provides a flowchart of a method for calculating the required torque of a drive motor. Figure 7 As shown, in S501, according to the current operation mode of the drive motor on the fuel cell vehicle, the required torque of the drive motor is calculated, including: S601: If the current operation mode is the start-up mode, a high-voltage self-check is performed on the power battery and the fuel cell, and when the fuel cell vehicle is in a stationary state, the required torque is determined to be a preset minimum torque.

[0092] For example, the preset minimum torque is 0.

[0093] S602: If the current operation mode is the creep mode, the required torque is calculated according to the sum of the initial torque and the feedback torque of the drive motor.

[0094] The initial torque is the torque when the vehicle is unloaded and creeping at a preset creep target speed, and the feedback torque is the real-time feedback torque calculated by the difference between the current vehicle speed and the creep target speed.

[0095] The product of the difference between the current vehicle speed and the creep target speed and the torque difference corresponding to each speed unit is the real-time feedback torque.

[0096] For example, the preset creep target vehicle speed is 5 km / h. The corresponding relationship between vehicle speed and torque, and the torque difference corresponding to each speed unit, are all preset values.

[0097] S603: If the current operation mode is the throttle driving mode, the required torque is calculated according to the preset maximum torque of the driving motor of the fuel cell vehicle in the current loading mode and the throttle opening information.

[0098] The current loading mode is: no-load mode, half-load mode or full-load mode.

[0099] The required torque is calculated as shown in the following formula (12): (12) in, is the required torque, is the throttle opening information, It is the preset maximum torque of the drive motor in the current loading mode.

[0100] S604: If the current operation mode is the cruise control mode, the required torque is calculated according to the deviation between the current vehicle speed of the fuel cell vehicle and the preset cruise speed.

[0101] According to the deviation between the current speed of the fuel cell vehicle and the preset cruising speed, the required torque is calculated through PI regulation.

[0102] S605. If the current operation mode is the braking energy recovery mode, the required torque is obtained by looking up a table according to the current vehicle speed and brake opening information of the fuel cell vehicle, or the required torque is obtained by looking up a table according to the current vehicle speed and the preset energy recovery gear of the fuel cell vehicle.

[0103] When the driver has a brake pedal request, the required torque is obtained by looking up the table according to the current speed and brake opening information of the fuel cell vehicle. When the driver has no brake pedal or accelerator pedal request, the required torque is obtained by looking up the table according to the current speed and preset energy recovery gear of the fuel cell vehicle.

[0104] S606: If the current operation mode is the vehicle limp home mode, the required torque is calculated according to the current vehicle speed of the fuel cell vehicle, the preset maximum vehicle speed, the preset maximum torque of the drive motor and the real-time rotation speed.

[0105] For example, the preset maximum vehicle speed is 20 km / h, and the motor demand power is limited to 50% of the motor peak power.

[0106] In limp home mode: if the vehicle speed exceeds 20 km / h, the motor demand torque is reset to 0; if the vehicle speed does not exceed 20 km / h and the demand torque does not exceed , the motor torque demand is calculated according to the method of S601-S605; if the vehicle speed does not exceed 20km / h but the required torque exceeds , then the maximum limit of the motor required torque is shown in the following formula (4-12).

[0107] (13) set up To preset the maximum torque, is the maximum power of the driving motor (in kW), and n is the real-time speed.

[0108] In summary, in this embodiment, if the current operating mode is the start-up mode, a high-voltage self-check is performed on the power battery and the fuel cell, and when the fuel cell vehicle is in a stationary state, the required torque is determined to be the preset minimum torque; if the current operating mode is the creeping mode, the required torque is calculated based on the sum of the initial torque and the feedback torque of the drive motor, the initial torque is the torque for creeping at a preset creeping target speed when the vehicle is unloaded, and the feedback torque is the real-time feedback torque calculated from the difference between the current vehicle speed and the creeping target speed; if the current operating mode is the throttle drive mode, the preset maximum torque of the drive motor of the fuel cell vehicle in the current loading mode, and the throttle opening information, are used to calculate the required torque. Required torque, the current loading mode is: no-load mode, half-load mode or full-load mode; if the current operating mode is the cruise mode, the required torque is calculated based on the deviation between the current speed of the fuel cell vehicle and the preset cruise speed; if the current operating mode is the brake energy recovery mode, the required torque is obtained by looking up the table according to the current speed and brake opening information of the fuel cell vehicle, or the required torque is obtained by looking up the table according to the current speed of the fuel cell vehicle and the preset energy recovery gear; if the current operating mode is the vehicle limp mode, the required torque is calculated based on the current speed of the fuel cell vehicle, the preset maximum speed, the preset maximum torque of the drive motor and the real-time speed. In this way, the torque under different operating modes can be accurately determined to achieve more accurate vehicle energy management.

[0109] The following is a description of the energy management device, equipment and storage medium for a fuel cell vehicle provided by the present application. The specific implementation process and technical effects are described above and will not be repeated below.

[0110] Figure 8 A schematic diagram of an energy management device for a fuel cell vehicle provided in an embodiment of the present application is shown in FIG. Figure 8 As shown, the device comprises: The acquisition module 801 is used to acquire vehicle operation analysis data of a fuel cell vehicle, and the vehicle operation analysis data includes: a driving power correction coefficient and other power correction coefficients.

[0111] The first calculation module 802 is used to calculate the driving power of the driving motor according to the bus voltage and bus current of the driving motor on the fuel cell vehicle, the throttle opening information of the fuel cell vehicle and the vehicle slope information of the fuel cell vehicle.

[0112] The second calculation module 803 is used to calculate the energy consumption power of other energy consumption systems according to the bus voltage of the power battery on the fuel cell vehicle and the energy consumption information of other energy consumption systems.

[0113] The first determination module 804 is used to perform weighted correction on the driving power and energy consumption power of the driving motor according to the vehicle driving mode, driving power correction coefficient and other power correction coefficients of the fuel cell vehicle to determine the target vehicle demand power of the fuel cell vehicle.

[0114] The second determination module 805 is used to determine the required power of the fuel cell stack on the fuel cell vehicle according to the current state of charge value of the power battery on the fuel cell vehicle, the required power of the target vehicle, and the vehicle driving mode.

[0115] The control module 806 is used to control the fuel cell to output power according to the power required by the fuel cell stack.

[0116] Furthermore, the first calculation module 802 is specifically used to calculate the actual power of the drive motor based on the bus voltage and bus current of the drive motor on the fuel cell vehicle; calculate the corrected power of the drive motor based on the throttle opening information and the vehicle slope information; and calculate the drive power of the drive motor based on the actual power and corrected power of the drive motor.

[0117] Furthermore, the second calculation module 803 is specifically used for other energy-consuming systems including: air-conditioning system, steering system, braking system and vehicle-mounted low-voltage system. The energy consumption information of other energy-consuming systems includes: energy consumption current of the air-conditioning system, energy consumption current of the steering system, energy consumption current of the braking system and energy consumption current of the vehicle-mounted low-voltage system; the energy consumption power of other energy-consuming systems is calculated according to the bus voltage of the power battery, the energy consumption current of the air-conditioning system, the energy consumption current of the steering system, the energy consumption current of the braking system and the energy consumption current of the vehicle-mounted low-voltage system.

[0118] Furthermore, the second determination module 805 is specifically used to determine the maximum output power of the fuel cell as the required power of the stack if the power demanded by the target vehicle is greater than the stack output power of the fuel cell; if the power demanded by the target vehicle is less than or equal to the stack output power of the fuel cell, then determine the most efficient output power of the fuel cell as the stack required power.

[0119] Furthermore, the second determination module 805 is also used for vehicle operation analysis data including: state of charge correction coefficient, vehicle operating condition type; according to the state of charge correction coefficient, the target state of charge value of the power battery is corrected; according to the vehicle operating condition type, the target operating condition of the fuel cell vehicle is determined, and the target operating condition is used to indicate whether the fuel cell vehicle is in a heavy-load short-distance transportation condition.

[0120] Furthermore, the second determination module 805 is also used to filter the stack power requirement of the fuel cell at the current moment according to the historical stack power requirement of the fuel cell at multiple historical moments within the preset power speed change interval and the weighted values ​​corresponding to the multiple historical moments.

[0121] Furthermore, the control module 806 is also used for vehicle operation analysis data including: optimal energy recovery gear information; calculating the required torque of the drive motor according to the current operating mode of the drive motor on the fuel cell vehicle, the current operating mode being: starting mode, creep mode, throttle drive mode, cruise control mode, brake energy recovery mode, or vehicle limp mode; correcting the required torque according to the optimal energy recovery gear information; performing weighted calculations on the corrected required torque at the current moment and the historical required torque at the preset historical moment according to preset weight parameters to obtain the target torque of the drive motor; and controlling the drive motor according to the target torque.

[0122] Further, the control module 806 is specifically used to perform a high-voltage self-test on the power battery and the fuel cell if the current operating mode is the starting mode, and determine that the required torque is a preset minimum torque when the fuel cell vehicle is in a stationary state; if the current operating mode is the creeping mode, the required torque is calculated based on the sum of the initial torque and the feedback torque of the drive motor, the initial torque is the torque for the vehicle to creep at a preset creeping target speed when it is unloaded, and the feedback torque is the real-time feedback torque calculated from the difference between the current vehicle speed and the creeping target speed; if the current operating mode is the throttle drive mode, the required torque is calculated based on the preset maximum torque of the drive motor of the fuel cell vehicle in the current loading mode, and the throttle opening information, and the current loading mode is: no-load mode, half-load mode or full-load mode; if the current operating mode is the cruise control mode, the required torque is calculated based on the deviation between the current vehicle speed of the fuel cell vehicle and the preset cruising speed; if the current operating mode is the brake energy recovery mode, the required torque is obtained by looking up a table according to the current vehicle speed and brake opening information of the fuel cell vehicle, or the required torque is obtained by looking up a table according to the current vehicle speed and the preset energy recovery gear of the fuel cell vehicle. If the current operating mode is the vehicle limp home mode, the required torque is calculated based on the current vehicle speed of the fuel cell vehicle, the preset maximum vehicle speed, the preset maximum torque of the drive motor, and the real-time rotation speed.

[0123] Fig. 9 A schematic diagram of a control device provided in an embodiment of the present application, wherein the control device may be a device with computing and processing functions.

[0124] The control device includes: a processor 901 and a storage medium 902. The processor 901 and the storage medium 902 are connected via a bus.

[0125] The storage medium 902 is used to store programs, and the processor 901 calls the programs stored in the storage medium 902 to execute the above method embodiment. The specific implementation method and technical effect are similar and will not be repeated here.

[0126] Optionally, the present invention also provides a storage medium, including a program, which is used to execute the above-mentioned method embodiment when executed by a processor. In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0127] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0128] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0129] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to perform some steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (English: Read-Only Memory, abbreviated: ROM), random access memory (English: Random Access Memory, abbreviated: RAM), disk or optical disk and other media that can store program codes.

Claims

1. A method for energy management of a fuel cell vehicle, characterized in that: The control device applied to the fuel cell vehicle, the method comprising: Acquiring vehicle operation analysis data of the fuel cell vehicle, the vehicle operation analysis data including: a driving power correction coefficient and other power correction coefficients; Calculating the driving power of the driving motor according to the bus voltage and bus current of the driving motor on the fuel cell vehicle, the throttle opening information of the fuel cell vehicle, and the vehicle slope information of the fuel cell vehicle; Calculating the energy consumption power of the other energy consumption systems according to the bus voltage of the power battery on the fuel cell vehicle and the energy consumption information of the other energy consumption systems; According to the vehicle driving mode of the fuel cell vehicle, the driving power correction coefficient and the other power correction coefficient, weighted correction is performed on the driving power of the driving motor and the energy consumption power to determine the target vehicle demand power of the fuel cell vehicle; Determining the required power of the fuel cell stack on the fuel cell vehicle according to the current state of charge value of the power battery on the fuel cell vehicle, the required power of the target vehicle, and the vehicle driving mode; According to the power demand of the fuel cell stack, the fuel cell is controlled to output power.

2. The method according to claim 1, characterized in that The step of calculating the driving power of the driving motor according to the bus voltage and bus current of the driving motor on the fuel cell vehicle, the throttle opening information of the fuel cell vehicle, and the vehicle slope information of the fuel cell vehicle comprises: Calculating the actual power of the drive motor on the fuel cell vehicle according to the bus voltage and bus current of the drive motor; Calculating the corrected power of the drive motor according to the throttle opening information and the vehicle slope information; The driving power of the driving motor is calculated according to the actual power and the corrected power of the driving motor.

3. The method according to claim 1, characterized in that The other energy-consuming systems include: an air-conditioning system, a steering system, a braking system and an on-board low-voltage system; the energy consumption information of the other energy-consuming systems includes: the energy consumption current of the air-conditioning system, the energy consumption current of the steering system, the energy consumption current of the braking system and the energy consumption current of the on-board low-voltage system; the energy consumption power of the other energy-consuming systems is calculated according to the bus voltage of the power battery on the fuel cell vehicle and the energy consumption information of the other energy-consuming systems, including: The energy consumption power of the other energy consumption systems is calculated according to the bus voltage of the power battery, the energy consumption current of the air conditioning system, the energy consumption current of the steering system, the energy consumption current of the braking system and the energy consumption current of the on-board low-voltage system.

4. The method according to claim 1, characterized in that: The step of determining the required power of the fuel cell stack on the fuel cell vehicle according to the current state of charge value of the power battery on the fuel cell vehicle, the required power of the target vehicle, and the vehicle driving mode includes: If the target vehicle's required power is greater than the fuel cell stack output power, determining the maximum output power of the fuel cell as the stack required power; If the target vehicle required power is less than or equal to the stack output power of the fuel cell, the most efficient output power of the fuel cell is determined as the stack required power.

5. The method according to claim 1, characterized in that The vehicle operation analysis data also includes: a state of charge correction coefficient and a vehicle operation condition type; the method also includes: Correcting the target state of charge value of the power battery according to the state of charge correction coefficient; According to the vehicle operating condition type, a target operating condition of the fuel cell vehicle is determined, and the target operating condition is used to indicate whether the fuel cell vehicle is in a heavy-load short-distance transport condition.

6. The method according to claim 1, characterized in that Before controlling the fuel cell to output power according to the power demand of the fuel cell stack, the method further includes: The stack power requirement of the fuel cell at the current moment is filtered based on the historical stack power requirement of the fuel cell at multiple historical moments within a preset power speed change interval and the weighted values ​​corresponding to the multiple historical moments.

7. The method according to claim 1, characterized in that The vehicle operation analysis data also includes: optimal energy recovery gear information; the method also includes: Calculating the required torque of the drive motor according to the current operating mode of the drive motor on the fuel cell vehicle, wherein the current operating mode is: starting mode, creeping mode, throttle driving mode, cruise control mode, brake energy recovery mode, or vehicle limp mode; Correcting the required torque according to the optimal energy recovery gear information; According to a preset weight parameter, a weighted calculation is performed on the corrected demand torque at the current moment and the historical demand torque at a preset historical moment to obtain a target torque of the drive motor; The drive motor is controlled according to the target torque.

8. The method according to claim 7, characterized in that The step of calculating the required torque of the drive motor according to the current operation mode of the drive motor on the fuel cell vehicle includes: If the current operation mode is the start-up mode, a high-voltage self-test is performed on the power battery and the fuel cell, and when the fuel cell vehicle is in a stationary state, the required torque is determined to be a preset minimum torque; If the current operation mode is the creep mode, the required torque is calculated according to the sum of the initial torque and the feedback torque of the drive motor, the initial torque being the torque for the vehicle to creep at a preset creep target speed when the vehicle is unloaded, and the feedback torque being the real-time feedback torque calculated from the difference between the current vehicle speed and the creep target speed; If the current operation mode is the throttle drive mode, the required torque is calculated according to the preset maximum torque of the drive motor of the fuel cell vehicle in the current loading mode and the throttle opening information, and the current loading mode is: no-load mode, half-load mode or full-load mode; If the current operating mode is a cruise control mode, the required torque is calculated according to a deviation between a current vehicle speed of the fuel cell vehicle and a preset cruise speed; If the current operation mode is the braking energy recovery mode, the required torque is obtained by looking up a table according to the current vehicle speed and brake opening information of the fuel cell vehicle, or the required torque is obtained by looking up a table according to the current vehicle speed and a preset energy recovery gear of the fuel cell vehicle; If the current operating mode is the vehicle limp home mode, the required torque is calculated based on the current vehicle speed of the fuel cell vehicle, a preset maximum vehicle speed, a preset maximum torque of the drive motor, and a real-time rotation speed.

9. An energy management system for a fuel cell vehicle, characterized in that: The energy management system includes: control equipment, power batteries, fuel cells, drive motor control systems, gearbox control systems, and other energy consumption systems; The control device is respectively connected to the power battery, the fuel cell, the drive motor control system, the gearbox control system, and the other energy-consuming systems, and the control device is used to execute the energy management method described in any one of claims 1 to 8 above.

10. A fuel cell vehicle, characterized in that: The fuel cell vehicle comprises: a vehicle body, and the energy management system according to claim 9 arranged on the vehicle body.

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