Control method and device for power system of vehicle and vehicle

Abstract

The invention provides a control method and device for a power system of a vehicle and the vehicle. The power system comprises a motor, a power cell and a fuel cell. The power battery is electrically connected with the motor. The fuel cell is electrically connected with the power cell and the motor. The control method comprises the steps that when the vehicle is braked, the target generated power of the fuel cell is determined according to the remaining electric quantity of the power cell; according to the allowable charging power of the power battery, the target power generation power and the actual power generation power of the fuel cell at the braking starting moment of the vehicle, the required recovery power of the motor in the vehicle braking process is determined; controlling the motor output torque according to the required recovery power; and controlling the output power of the fuel cell according to the target generation power and the actual generation power. When the vehicle is braked, the fuel cell can be kept running continuously, power generation power is not switched frequently, the service life of the fuel cell is prolonged, braking recovery power is utilized as much as possible, and the energy utilization rate of the vehicle is increased.

Description

Technical Field

[0001] The present application relates to the technical field of control of a power system of a vehicle, and in particular to a control method and device for a power system of a vehicle and a vehicle. Background Art

[0002] A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. Its basic principle is the reverse reaction of water electrolysis, supplying hydrogen and oxygen to the anode and cathode of the battery respectively. After hydrogen diffuses outward through the anode and reacts with the electrolyte, it releases electrons and reaches the cathode through an external load. With its advantages of high efficiency, zero emissions, and low noise, hydrogen fuel cells have become an important development trend in my country's energy structure transformation, energy conservation and emission reduction, and automobile industry upgrading, and will become an important solution for the sustainable development of my country's cities and economy.

[0003] For passenger vehicles with a dual energy system based on high-voltage power batteries and hydrogen fuel cells, how to utilize braking energy recovery during braking without frequently switching the power generation power of the fuel cell has become an urgent problem to be solved. Summary of the invention

[0004] The present application provides a control method and device for a power system of a vehicle and a vehicle, which can extend the life of a fuel cell and improve the energy utilization rate of the vehicle.

[0005] The present application provides a control method for a power system of a vehicle, wherein the power system includes a motor, a power battery and a fuel cell, wherein the power battery is electrically connected to the motor, and the fuel cell is electrically connected to the power battery and the motor;

[0006] The control method comprises:

[0007] When the vehicle is braked, determining the target power generation power of the fuel cell according to the remaining power of the power battery;

[0008] Determining the required recovery power of the motor during the braking process of the vehicle according to the allowed charging power of the power battery, the target power generation, and the actual power generation of the fuel cell at the start of braking of the vehicle;

[0009] Recover power according to the demand and control the output torque of the motor;

[0010] The output power of the fuel cell is controlled based on the target power generation and the actual power generation.

[0011] Optionally, the vehicle includes a brake pedal and a hydraulic brake system, and before determining the target power generation power of the fuel cell, the control method includes:

[0012] Determine the required braking torque of the vehicle according to the opening degree of the brake pedal at the start moment of braking;

[0013] After controlling the torque output by the motor, the control method includes:

[0014] Control the torque output by the hydraulic braking system according to the torque output by the motor and the required braking torque.

[0015] Optionally, the power generation power of the fuel cell includes a power level interval, and the power level interval includes at least two levels of intervals; the minimum power of the previous level interval is greater than or equal to the maximum power of the next level interval;

[0016] The determining of the required recovery power of the motor during the braking process of the vehicle according to the allowable charging power of the power battery, the target power generation power, and the actual power generation power of the fuel cell at the start moment of braking of the vehicle includes:

[0017] If the target power generation power and the actual power generation power are in the same power level interval, determine the difference between the allowable charging power and the actual power generation power as the required recovery power;

[0018] The controlling of the power output of the fuel cell according to the target power generation power and the actual power generation power includes:

[0019] Control the fuel cell to continue to output the actual power generation power.

[0020] Optionally, the power generation power of the fuel cell includes a power level interval, and the power level interval includes at least two levels of intervals; the minimum power of the previous level interval is greater than or equal to the maximum power of the next level interval;

[0021] The determining of the required recovery power of the motor during the braking process of the vehicle according to the allowable charging power of the power battery, the target power generation power, and the actual power generation power of the fuel cell at the start moment of braking of the vehicle includes:

[0022] If the target power generation power is greater than the actual power generation power, determine the difference between the allowable charging power and the actual power generation power as the required recovery power;

[0023] The controlling of the power output of the fuel cell according to the target power generation power and the actual power generation power includes:

[0024] Control the fuel cell to continue to output the actual power generation power;

[0025] After the vehicle completes braking, control the fuel cell to output the target power generation power.

[0026] Optionally, the power generation power of the fuel cell includes a power level range, and the power level range includes at least two levels of ranges; the minimum power of the previous level range is greater than or equal to the maximum power of the next level range;

[0027] Determining the required recovery power of the motor during the vehicle braking process according to the allowable charging power of the power battery, the target power generation power, and the actual power generation power of the fuel cell at the start time of the vehicle braking includes:

[0028] If the target power generation power is less than the actual power generation power, determining the difference between the allowable charging power and the target power generation power as the required recovery power;

[0029] Controlling the output power of the fuel cell according to the target power generation power and the actual power generation power includes:

[0030] Controlling the fuel cell to output the target power generation power.

[0031] Optionally, controlling the output torque of the motor according to the required recovery power includes:

[0032] Determining the actual recovery power of the motor according to the available recovery power of the motor and the required recovery power;

[0033] Controlling the output torque of the motor according to the actual recovery power.

[0034] Optionally, the vehicle includes a high-voltage power-consuming component, which is electrically connected to the power battery. Before determining the actual recovery power of the motor, the control method includes:

[0035] Determining the sum of the allowable charging power and the required power of the high-voltage power-consuming component as the allowable recovery power of the power system;

[0036] Determining the smaller value between the allowable recovery power and the maximum recovery power of the motor as the available recovery power of the motor.

[0037] The present application provides a computer-readable storage medium, on which a program is stored. When the program is executed by a processor, the control method of the power system of the vehicle described in any one of the above is implemented.

[0038] The present application provides a control device for the power system of a vehicle, including one or more processors for implementing the control method of the power system of the vehicle described in any one of the above.

[0039] The present application further provides a vehicle, including:

[0040] A power system, including an electric motor, a power battery, and a fuel cell, wherein the power battery is electrically connected to the electric motor, and the fuel cell is electrically connected to the power battery and the electric motor; and

[0041] The control device as described above, wherein the control device is electrically connected to the power system.

[0042] In some embodiments, when the vehicle brakes, the target power generation power of the fuel cell is determined according to the remaining power of the power battery; according to the allowable charging power of the power battery, the target power generation power, and the actual power generation power of the fuel cell at the start moment of the vehicle braking, the required recovery power of the electric motor during the vehicle braking process is determined; according to the required recovery power, the electric motor output torque is controlled; according to the target power generation power and the actual power generation power, the fuel cell output power is controlled; when performing braking energy recovery, the allowable charging power of the power battery, the target power generation power, and the actual power generation power of the fuel cell are considered, so that the braking energy recovery will not cause overcharging of the power battery, and the fuel cell can continue to operate, without frequently switching the power generation power, extending the service life of the fuel cell, and making full use of the braking recovery power as much as possible to improve the vehicle energy utilization rate.

[0043] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings herein are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application.

[0045] Figure 1 The structural block diagram of an embodiment of the vehicle of this application is shown.

[0046] Figure 2 The flowchart of an embodiment of the control method of the power system of the vehicle of this application is shown.

[0047] Figure 3 The partial flowchart of another embodiment of the control method of the power system of the vehicle of this application is shown.

[0048] Figure 4 The structural block diagram of the control device of the power system of the vehicle provided by the embodiment of this application is shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0049] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0050] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit the present application. Unless otherwise defined, the technical terms or scientific terms used in this application should have the ordinary meaning as understood by those of ordinary skill in the art to which this application pertains. The terms "first", "second", and similar terms used in the specification and claims of this application do not denote any order, quantity, or importance, but are only used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a limitation of quantity, but rather indicate the presence of at least one. "Plurality" or "several" means two or more. Unless otherwise indicated, terms such as "front", "rear", "lower", and / or "upper" are for convenience of description only and are not limited to one position or a spatial orientation. The terms "include" or "comprise" and similar terms mean that the elements or items appearing before "include" or "comprise" cover the elements or items listed after "include" or "comprise" and their equivalents, and do not exclude other elements or items. The terms "connected" or "coupled" and similar terms are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.

[0051] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "the", and "said" used in this application and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0052] The powertrain of the embodiment of the present application includes a motor, a power battery, and a fuel cell. The power battery is electrically connected to the motor. The fuel cell is electrically connected to the power battery and the motor. The control method includes: when the vehicle brakes, determining the target power generation power of the fuel cell according to the remaining power of the power battery; determining the required recovery power of the motor during the vehicle braking process according to the allowable charging power of the power battery, the target power generation power, and the actual power generation power of the fuel cell at the start moment of the vehicle braking; controlling the motor to output torque according to the required recovery power; and controlling the fuel cell to output power according to the target power generation power and the actual power generation power. The present application can keep the fuel cell running continuously when the vehicle brakes, without frequently switching the power generation power, extend the service life of the fuel cell, and make full use of the braking recovery power as much as possible to improve the energy utilization rate of the vehicle.

[0053] The present application provides a control method, a device, and a vehicle for the powertrain of a vehicle. The following will describe in detail the control method, the device, and the vehicle for the powertrain of the vehicle of the present application with reference to the accompanying drawings. Without conflict, the features in the following embodiments and implementation manners can be combined with each other.

[0054] Figure 1 Shown is a structural block diagram of an embodiment of a vehicle 10 of the present application.

[0055] The vehicle 10 of the embodiment of the present application includes, but is not limited to, sedans, SUVs, MPVs, off-road vehicles, pickup trucks, or other non-railborne vehicles driven by power. The vehicle 10 includes hybrid new energy vehicles and other vehicles that use in-vehicle power batteries as the main power source or one of the power sources.

[0056] As Figure 1 Shown, the vehicle 10 includes: a powertrain 11 and a control device 12. The powertrain 11 includes a motor 13, a power battery 14, and a fuel cell 15. The power battery 14 is electrically connected to the motor 13 and is used to supply power to the motor 13. The power battery 14 includes a lithium battery. The fuel cell 15 is electrically connected to the power battery 14 and the motor 13. When the fuel cell 15 is in the startup state, the fuel cell 15 can supply power to the power battery 14. The fuel cell 15 can also supply power to the motor 13. In some embodiments, the fuel cell 15 includes a hydrogen fuel cell.

[0057] The control device 12 is electrically connected to the powertrain 11. The control device 12 is used to control the operation of the powertrain 11. The control device 12 is used to execute the control method of the present application.

[0058] The vehicle 10 further includes a brake pedal and a hydraulic braking system. The brake pedal is communicatively connected to the control device 12. When the vehicle 10 brakes, the control device 12 collects the opening degree of the brake pedal. The hydraulic braking system is communicatively connected to the control device 12. The hydraulic braking system is used to provide hydraulic braking force to meet the braking requirements of the vehicle 10.

[0059] The vehicle 10 further includes high-voltage electrical components, which are electrically connected to the power battery 14. The high-voltage electrical components include, but are not limited to, a high-voltage power distribution box, an electric compressor, a DC-DC converter, an on-vehicle charger, and a PTC heater. The power battery 14 is used to supply power to the high-voltage electrical components.

[0060] The power generation power of the fuel cell 15 includes a power level range. The power level range includes at least two levels of ranges. The minimum power of the previous level range is greater than or equal to the maximum power of the next level range. Each power level range may include multiple power values or may include one power value. The power level range is the range where the fuel cell 15 operates at a high efficiency point. The power level range is pre-calibrated according to the efficiency characteristics of the fuel cell 15. Depending on the vehicle model, the power level range may be different.

[0061] Figure 2 The figure shows a flowchart of an embodiment of the control method 20 for the power system of the vehicle of the present application. The control device 12 is used to execute the control method 20 of the present application.

[0062] The control method 20 for the power system of the vehicle includes: steps 21 to 24.

[0063] Step 21, when the vehicle 10 brakes, determine the target power generation power of the fuel cell 15 according to the remaining power of the power battery 14. In some embodiments, the vehicle 10 includes a battery management system electrically connected to the power battery 14. The remaining power of the power battery 14 can be sent to the control device 12 by the battery management system. In some embodiments, step 21 includes: when the vehicle 10 brakes, determine the target power generation power of the fuel cell 15 according to the one-to-one mapping relationship between the interval where the remaining power of the power battery 14 is located and the power level interval where the target power generation power of the fuel cell 15 is located. The remaining power of the power battery 14 includes several power intervals, and the power level interval where the target power generation power of the fuel cell 15 is located includes several power level intervals. The power interval and the power level interval are in a one-to-one mapping relationship and are pre-stored in the control device 12. For example, the power level interval where the target power generation power of the fuel cell 15 is located includes a first power level interval and a second power level interval, and the powers included in the first power level interval and the second power level interval do not overlap. The remaining power of the power battery 14 being 20% - 40% is the first power interval, and the remaining power being 50% - 70% is the second power interval. The first power interval corresponds to the first power level interval, and the second power interval corresponds to the second power level interval. The control device 12 determines the power interval where the remaining power is located according to the remaining power of the power battery 14 sent by the battery management system, and then obtains the corresponding power level interval, so as to determine the target power generation power of the fuel cell 15. The target power generation power of the fuel cell 15 can be pre-calibrated and varies with different conditions such as the vehicle model, the ambient temperature of the vehicle, and the altitude. In this way, the target power generation power of the fuel cell 15 is more adaptable to the working conditions of the vehicle 10.

[0064] Step 22, according to the allowable charging power of the power battery 14, the target power generation power, and the actual power generation power of the fuel cell 15 at the start moment of braking of the vehicle 10, determine the required recovery power of the motor 13 during the braking process of the vehicle 10. The allowable charging power of the power battery 14 can be detected by the battery management system. The actual power generation power of the fuel cell 15 at the start moment of braking of the vehicle 10 can be directly detected by the control device 12. When determining the required recovery power of the motor 13 during the braking process of the vehicle 10, consider the allowable charging power of the power battery 14, the target power generation power, and the actual power generation power of the fuel cell 15 at the start moment of braking of the vehicle 10, so as to ensure that the power battery 14 will not be overcharged and the power generation power of the fuel cell 15 will not be frequently switched during the braking energy recovery process.

[0065] Step 23, control the motor 13 to output torque according to the required recovery power.

[0066] In some embodiments, step 23 includes: determining the actual recovery power of the motor 13 according to the available recovery power and the required recovery power of the motor 13; controlling the output torque of the motor 13 according to the actual recovery power.

[0067] Before determining the actual recovery power of the motor 13, the control method 20 includes: determining the sum of the allowable charging power and the required power of the high-voltage electrical components as the allowable recovery power of the power system; determining the smaller value between the allowable recovery power and the maximum recovery power of the motor 13 as the available recovery power of the motor 13.

[0068] The maximum recovery power of the motor 13 is the upper limit of the recovery power that the motor 13 can provide. The available recovery power of the motor 13 is the upper limit of the recovery power that can be provided during the braking process. The sum of the allowable charging power of the power battery 14 and the required power of the high-voltage electrical components is the allowable recovery power of the power system. The available recovery power is the smaller value between the allowable recovery power and the maximum recovery power of the motor 13, so that the available recovery power will not exceed the required power of the power battery 14 and the high-voltage electrical components, will not overcharge the power battery 14, and will not exceed the recovery power capacity of the motor 13. The actual recovery power of the motor 13 is the actual recovery power provided by the motor 13 during the braking process. The actual recovery power is the smaller value between the available recovery power and the required recovery power. The control device 12 calculates the required braking torque of the motor 13 according to the actual recovery power and controls the motor 13 to output the corresponding torque.

[0069] Step 24, controlling the output power of the fuel cell 15 according to the target power generation and the actual power generation. During the braking process, the fuel cell 15 will not be turned off, and its output power generation is determined according to its target power generation and the actual power generation, avoiding frequent start-stop and frequent power change of the fuel cell 15.

[0070] When performing braking energy recovery, the allowable charging power of the power battery 14, the target power generation and the actual power generation of the fuel cell 15 are considered, so that the braking energy recovery will not cause overcharging of the power battery 14, and the fuel cell 15 can continue to operate, without frequent switching of the power generation power, extending the life of the fuel cell 15, and making the best use of the braking recovery power as much as possible to improve the energy utilization rate of the vehicle 10.

[0071] Figure 3 The partial flowchart of another embodiment of the control method 20 of the power system of the vehicle according to the present application is shown.

[0072] The control method 20 includes: step 25 to step 33.

[0073] Step 25, determining whether the target power generation and the actual power generation are in the same power level interval.

[0074] After determining the target power generation of the fuel cell 15 in step 21, step 25 is executed.

[0075] Step 26: If the target power generation and the actual power generation are in the same power level range, determine the difference between the allowable charging power and the actual power generation as the required recovery power.

[0076] Step 27: Control the fuel cell 15 to continue to output the actual power generation.

[0077] If the target power generation and the actual power generation are in the same power level range, the power generation of the fuel cell 15 does not need to be switched. Determine the required recovery power as the difference between the allowable charging power and the actual power generation. In this way, the power generation of the fuel cell 15 does not need to be changed, and the actual recovery power provided by the motor 13 will not exceed the difference between the allowable charging power and the actual power generation. Before step 27, step 23 is executed. The fuel cell 15 and the motor 13 jointly charge the power battery 14, and the power battery 14 will not be overcharged. At the same time, the recovery power provided by the motor 13 can be utilized, improving the energy utilization rate of the vehicle 10.

[0078] Step 28: If the target power generation and the actual power generation are not in the same power level range, determine the magnitude relationship between the target power generation and the actual power generation.

[0079] Step 29: If the target power generation is greater than the actual power generation, determine the difference between the allowable charging power and the actual power generation as the required recovery power.

[0080] Step 30: Control the fuel cell 15 to continue to output the actual power generation.

[0081] Step 31: After the vehicle 10 completes braking, control the fuel cell 15 to output the target power generation.

[0082] If the target power generation is greater than the actual power generation, it means that the fuel cell 15 needs to switch to the next higher power level range of the power level range where the actual power generation is located. It also means that the remaining power of the power battery 14 is relatively low at this time, and the power battery 14 requires a greater charging power. Therefore, the required recovery power can be appropriately increased, and the difference between the allowable charging power and the actual power generation is determined as the required recovery power. Before step 30, step 23 is executed. The vehicle 10 first performs braking energy recovery. At this time, the fuel cell 15 still outputs the actual power generation, so that the power battery 14 will not be overcharged. After the vehicle 10 completes braking energy recovery, then control the fuel cell 15 to output the target power generation. In this way, the recovery power of the motor 13 can be utilized as much as possible, improving the energy utilization rate of the vehicle 10.

[0083] Step 32, if the target power generation is less than the actual power generation, determine the difference between the allowable charging power and the target power generation as the required recovery power.

[0084] Step 33, control the fuel cell to output the target power generation.

[0085] If the target power generation is less than the actual power generation, it indicates that the fuel cell 15 needs to switch to the next power level interval of the power level interval where the actual power generation is located. It also indicates that the remaining power of the power battery 14 is relatively high at this time, and the power battery 14 requires a smaller charging power. Determine the difference between the allowable charging power and the target power generation as the required recovery power, which can ensure that the power battery 14 is not overcharged during the braking energy recovery process. Before step 33, execute step 23. Control the fuel cell 15 to output the target power generation to meet the requirements of the power battery 14.

[0086] In some embodiments, before step 21, the control method 20 includes: determining the required braking torque of the vehicle 10 according to the opening of the brake pedal at the start of braking.

[0087] After step 23, the control method includes: controlling the hydraulic braking system to output torque according to the torque output by the motor 13 and the required braking torque.

[0088] The difference between the required braking torque and the torque output by the motor 13 is used as the torque output by the hydraulic braking system. In this way, the hydraulic braking system can provide the required braking torque that the motor 13 cannot meet, ensuring the braking force of the vehicle 10.

[0089] Figure 4 The figure shows a structural block diagram of the control device 12 for the power system of the vehicle provided by the embodiment of the present application.

[0090] As Figure 4 shown, the control device 12 includes one or more processors 41 for implementing the control method 20 for the power system of the vehicle as described above.

[0091] In some embodiments, the control device 12 for the power system of the vehicle may include a computer-readable storage medium 42. The computer-readable storage medium 42 may store a program that can be called by the processor 41, and may include a non-volatile storage medium. In some embodiments, the control device 12 for the power system of the vehicle may include a memory 43 and an interface 44. In some embodiments, the control device 12 for the power system of the vehicle may also include other hardware according to actual applications.

[0092] The computer-readable storage medium 42 of the embodiment of the present application stores a program thereon. When the program is executed by the processor 41, it is used to implement the control method 20 for the power system of the vehicle as described above.

[0093] The present application may take the form of a computer program product implemented on one or more computer-readable storage media 42 that contain program code (including but not limited to disk memory, CD-ROM, optical memory, etc.). The computer-readable storage media 42 include both permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of the computer-readable storage media 42 include but are not limited to: phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette tapes, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible by a computing device.

[0094] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include known common knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the following claims.

[0095] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A control method for a power system of a vehicle, characterized in that, The power system includes a motor, a power battery, and a fuel cell. The power battery is electrically connected to the motor, and the fuel cell is electrically connected to the power battery and the motor; The control method includes: When the vehicle brakes, determine the target power generation power of the fuel cell according to the remaining power of the power battery; Determine the required recovery power of the motor during the vehicle braking process according to the allowable charging power of the power battery, the target power generation power, and the actual power generation power of the fuel cell at the start moment of the vehicle braking; Control the motor to output torque according to the required recovery power; Control the fuel cell to output power according to the target power generation power and the actual power generation power.

2. The control method according to claim 1, characterized in that The vehicle includes a brake pedal and a hydraulic braking system. Before determining the target power generation power of the fuel cell, the control method includes: Determine the required braking torque of the vehicle according to the opening of the brake pedal at the start moment of braking; After controlling the motor to output torque, the control method includes: Control the hydraulic braking system to output torque according to the torque output by the motor and the required braking torque.

3. The control method according to claim 1, wherein The power generation power of the fuel cell includes a power level interval, and the power level interval includes at least two levels of intervals; the minimum power of the previous level interval is greater than or equal to the maximum power of the next level interval; The determining the required recovery power of the motor during the vehicle braking process according to the allowable charging power of the power battery, the target power generation power, and the actual power generation power of the fuel cell at the start moment of the vehicle braking includes: If the target power generation power and the actual power generation power are in the same power level interval, determine the difference between the allowable charging power and the actual power generation power as the required recovery power; The controlling the fuel cell to output power according to the target power generation power and the actual power generation power includes: Control the fuel cell to continue to output the actual power generation power.

4. The control method according to claim 1, wherein The power generation power of the fuel cell includes a power level interval, and the power level interval includes at least two levels of intervals; the minimum power of the previous level interval is greater than or equal to the maximum power of the next level interval; The determining the required recovery power of the motor during the vehicle braking process according to the allowable charging power of the power battery, the target power generation power, and the actual power generation power of the fuel cell at the start moment of the vehicle braking includes: If the target power generation power is greater than the actual power generation power, determine the difference between the allowable charging power and the actual power generation power as the required recovery power; The controlling the fuel cell to output power according to the target power generation power and the actual power generation power includes: Control the fuel cell to continue to output the actual power generation power; After the vehicle completes braking, control the fuel cell to output the target power generation power.

5. The control method according to claim 1, wherein The power generation power of the fuel cell includes a power level range, and the power level range includes at least two levels of ranges; the minimum power of the previous level range is greater than or equal to the maximum power of the next level range. Determining the required recovery power of the motor during the vehicle braking process according to the allowable charging power of the power battery, the target power generation power, and the actual power generation power of the fuel cell at the start moment of the vehicle braking includes: If the target power generation power is less than the actual power generation power, determining the difference between the allowable charging power and the target power generation power as the required recovery power. Controlling the output power of the fuel cell according to the target power generation power and the actual power generation power includes: Controlling the fuel cell to output the target power generation power.

6. The control method according to claim 1, wherein Controlling the output torque of the motor according to the required recovery power includes: Determining the actual recovery power of the motor according to the available recovery power and the required recovery power of the motor. Controlling the output torque of the motor according to the actual recovery power.

7. The control method according to claim 6, characterized in that, The vehicle includes high-voltage electrical components electrically connected to the power battery. Before determining the actual recovery power of the motor, the control method includes: Determining the sum of the allowable charging power and the required power of the high-voltage electrical components as the allowable recovery power of the power system. Determining the smaller value between the allowable recovery power and the maximum recovery power of the motor as the available recovery power of the motor.

8. A computer-readable storage medium, characterized in that, Stored thereon is a program, which when executed by a processor, implements the control method of the power system of the vehicle according to any one of claims 1-7.

9. A control device for a power system of a vehicle, characterized in that, Including one or more processors for implementing the control method of the power system of the vehicle according to any one of claims 1-7.

10. A vehicle, characterized in that, Including: A power system including a motor, a power battery, and a fuel cell, where the power battery is electrically connected to the motor, and the fuel cell is electrically connected to the power battery and the motor. And The control device according to claim 9, where the control device is electrically connected to the power system.

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