Fuel cell vehicle energy recovery control method, device, equipment and storage medium

Abstract

The present invention discloses a fuel cell vehicle energy recovery control method, device, equipment and storage medium, which relates to the field of new energy vehicle technology and can solve the problem of high vehicle energy consumption caused by insufficient energy recovery capacity of fuel cell commercial vehicles in the prior art. The specific technical solution is: obtaining the available power and target power for energy recovery; judging whether the available power is greater than the target power; if not, performing energy recovery according to the target power; if so, calculating the average power difference accumulated for a preset number of times, outputting the actual available power according to the average power difference, and recovering energy according to the actual available power. In the case where the available power is greater than the target power, the present invention limits the output power of the fuel cell by accumulating the average value of the power difference for a preset number of times. This method can accurately match the energy recovery power demand in actual operating conditions, effectively reduce the output power of the fuel cell engine, improve the energy recovery efficiency of the vehicle, and reduce the frequency of engine power switching.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicle technology, and in particular to a fuel cell vehicle energy recovery control method, device, equipment and storage medium. Background Art

[0002] In recent years, with the global energy transition and the growing need for environmental protection, the new energy vehicle industry has experienced rapid growth. Among the various new energy vehicle technology options, fuel cell vehicles, with their significant advantages such as zero emissions and high efficiency, have become a key direction for the future sustainable development of the automotive industry and have garnered widespread attention from the industry.

[0003] However, fuel cell vehicles still face technical challenges in energy recovery. When the target power for vehicle braking energy recovery exceeds the system's allowable range, existing technologies typically adopt a strategy of reducing energy recovery power to prevent overcharging of the power battery and accelerated aging of the fuel cell engine due to frequent load changes. While this strategy ensures system safety, it also introduces new problems: on the one hand, the fuel cell engine needs to maintain a relatively stable power point (usually lasting minutes), and frequent power fluctuations can significantly affect its service life; on the other hand, the small-capacity power battery configuration commonly used in the commercial vehicle field further limits the room for improvement in energy recovery efficiency. These technical bottlenecks make it difficult to fully realize the vehicle's energy recovery efficiency, ultimately affecting the economic and environmental performance of the entire vehicle. Summary of the Invention

[0004] The fuel cell vehicle energy recovery control method, device, equipment, and storage medium provided by the embodiments of the present invention can solve the problem of insufficient energy recovery capacity of fuel cell commercial vehicles in the prior art, resulting in high vehicle energy consumption. The technical solution is as follows:

[0005] According to a first aspect of an embodiment of the present invention, a fuel cell vehicle energy recovery control method is provided, the method comprising:

[0006] Obtaining the available power and target power of energy recovery;

[0007] Determining whether the available power is greater than the target power;

[0008] If not, performing energy recovery according to the target power;

[0009] If so, calculate the average power difference accumulated for a preset number of times, where the power difference is the difference between the target power and the available power; output the actual available power according to the average power difference, and perform energy recovery according to the actual available power.

[0010] The fuel cell vehicle energy recovery control method provided by an embodiment of the present invention first obtains the available power and target power for energy recovery; then determines whether the available power is greater than the target power; if the available power is less than or equal to the target power, energy recovery is performed according to the target power; or, if the available power is greater than the target power, the average power difference accumulated over a preset number of times is calculated, where the power difference is the difference between the target power and the available power; the actual available power is output based on the average power difference, and energy recovery is performed based on the actual available power. When the available power is greater than the target power, the present invention limits the output power of the fuel cell by accumulating the average power difference over a preset number of times. This method can accurately match the energy recovery power requirements under actual operating conditions, effectively reducing the output power of the fuel cell engine, while improving the vehicle's energy recovery efficiency and reducing the frequency of engine power switching. This improvement not only helps extend the service life of the fuel cell engine, but also better meets the vehicle's driving power requirements, ensuring that the vehicle's dynamic performance is fully guaranteed. Furthermore, by optimizing power management, this method can significantly improve the operating efficiency of the fuel cell engine, reduce the vehicle's operating energy consumption, and thus reduce operating costs, while further optimizing the vehicle's overall energy consumption. More importantly, it can effectively avoid power battery overcharging and fuel cell engine overvoltage failure caused by high-power energy recovery, thereby enhancing the reliability and safety of the system.

[0011] As a further solution of the present invention: the available power is calculated by a first formula, which includes:

[0012]

[0013] in, is the available power; Allowable charging power for the battery; Output power for battery engine

[0014] The method of the present invention realizes the coordinated calculation of charging and discharging power through the above operations, thereby ensuring the integrity of the system energy flow.

[0015] As a further solution of the present invention: the target power is calculated by a second formula, and the second formula includes:

[0016]

[0017] in, is the target power; is the target torque; is the motor speed.

[0018] The method of the present invention calculates the target power through the above formula, comprehensively considers the target torque and motor speed, and can achieve precise control of the motor power, providing efficient and reliable technical support for energy recovery and motor control.

[0019] As a further solution of the present invention: outputting the actual available power according to the average power difference includes:

[0020] Obtaining a limited power according to the average power difference;

[0021] The actual available power is output according to the limited power.

[0022] The method of the present invention obtains the limited power according to the average power difference and outputs the actual available power according to the limited power, thereby realizing dynamic adjustment and optimization of the available power of the battery system, improving the energy utilization efficiency of the battery system, and protecting the safety and life of the battery system.

[0023] As a further solution of the present invention: the limiting power is obtained according to the average power difference and calculated using a third formula, the third formula including:

[0024]

[0025] in, To limit power; Output power for the battery engine; is the average power difference.

[0026] The method of the present invention obtains the limit power by using the average power difference, which can achieve dynamic adjustment of the battery system's available power. When the average power difference is large, it indicates that there is a large difference between the battery system's power output and demand. In this case, the limit power can be appropriately lowered to reduce the battery system's power output and avoid overcharging or over-discharging the battery. When the average power difference is small, it indicates that the difference between the battery system's power output and demand is small. In this case, the limit power can be appropriately increased to increase the battery system's power output and meet the vehicle's driving needs.

[0027] As a further solution of the present invention: the actual available power output according to the limited power is calculated by a fourth formula, and the fourth formula includes:

[0028]

[0029] in, is the actual available power; is the available power; To limit power.

[0030] The method of the present invention ensures that the battery system operates within a safe range by limiting the actual available power output. Power limitation takes into account the safe operating range of the battery system. By outputting the actual available power based on the limited power, the battery system is prevented from operating outside its safe operating range, thereby protecting the safety and life of the battery system.

[0031] As a further solution of the present invention: the calculating of the average power difference accumulated for a preset number of times includes:

[0032] When the available power is greater than the target power, the current power difference of the vehicle is recorded, and when the accumulated number of times reaches a preset number, the average power difference of the recorded power differences is calculated.

[0033] The method of the present invention achieves dynamic adjustment of power output by repeatedly recording and calculating the average power difference when the available power exceeds the target power. This not only accurately reflects the actual deviation of the system power, but also effectively avoids misjudgments caused by single power fluctuations. Through multiple sampling and averaging, the present invention can more accurately determine the actual available power, significantly improving the stability and reliability of the system.

[0034] According to a second aspect of an embodiment of the present invention, a fuel cell vehicle energy recovery control device is provided, comprising:

[0035] An acquisition module, used to obtain available power and target power for energy recovery;

[0036] A judging module, configured to judge whether the available power is greater than the target power;

[0037] a processing module for performing energy recovery according to the target power when the result of the judgment module is no; or, when the result of the judgment module is yes, calculating an average power difference accumulated for a preset number of times, where the power difference is the difference between the target power and the available power; outputting actual available power according to the average power difference, and performing energy recovery according to the actual available power.

[0038] An energy recovery control device for a fuel cell vehicle provided by an embodiment of the present invention includes an acquisition module, a judgment module, and a processing module. The acquisition module acquires the available power and target power for energy recovery; the judgment module determines whether the available power is greater than the target power; and if the judgment module determines a negative result, the processing module performs energy recovery based on the target power. Alternatively, if the judgment module determines a positive result, the processing module calculates the average power difference accumulated over a preset number of times, where the power difference is the difference between the target power and the available power; outputs the actual available power based on the average power difference, and performs energy recovery based on the actual available power. When the available power is greater than the target power, the present invention limits the output power of the fuel cell by accumulating the average power difference over a preset number of times. This invention can accurately match the energy recovery power requirements under actual operating conditions, thereby effectively reducing the output power of the fuel cell engine, improving the vehicle's energy recovery efficiency, and reducing the frequency of engine power switching. This improvement not only helps extend the service life of the fuel cell engine, but also better meets the vehicle's driving power requirements, ensuring that the vehicle's dynamic performance is fully guaranteed. Furthermore, by optimizing power management, the present invention can significantly improve the operating efficiency of the fuel cell engine, reduce the vehicle's operating energy consumption, and thus reduce operating costs, while further optimizing the vehicle's overall energy consumption. More importantly, it can effectively avoid power battery overcharging and fuel cell engine overvoltage failure caused by high-power energy recovery, thereby enhancing the reliability and safety of the system.

[0039] According to a third aspect of an embodiment of the present invention, a fuel cell vehicle energy recovery control device is provided, the fuel cell vehicle energy recovery control device comprising a processor and a memory, the memory storing at least one computer instruction, the instruction being loaded and executed by the processor to implement the steps performed in any one of the above-mentioned fuel cell vehicle energy recovery control methods.

[0040] According to a fourth aspect of an embodiment of the present invention, a computer-readable storage medium is provided, wherein the storage medium stores at least one computer instruction, which is loaded and executed by a processor to implement the steps performed in any of the above-mentioned fuel cell vehicle energy recovery control methods.

[0041] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0043] Figure 1 This is a flow chart of a fuel cell vehicle energy recovery control method provided by an embodiment of the present invention;

[0044] Figure 2 This is a flow chart of operations in the fuel cell vehicle energy recovery control method provided by an embodiment of the present invention;

[0045] Figure 3 is an efficiency curve of a fuel cell system provided by an embodiment of the present invention;

[0046] Figure 4 It is a structural diagram of the energy recovery control device for a fuel cell vehicle provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0047] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present invention.

[0048] The fuel cell vehicle energy recovery control method provided by the embodiment of the present invention is as follows: Figure 1 As shown, the fuel cell vehicle energy recovery control method includes the following steps:

[0049] Step 101: Obtain available power and target power for energy recovery;

[0050] In this embodiment, Figure 2 As shown, the vehicle control unit (VCU) first obtains the current vehicle status and ensures that all vehicle sensors are in normal working order and free of faults. The VCU then receives status and parameter feedback from components such as the drive motor, power battery, transmission, fuel cell engine, and hydrogen system, confirming that each system is functioning properly and ensuring that the vehicle's high-voltage power supply is complete. Based on this, the VCU further determines whether the fuel cell engine meets startup conditions, including: the vehicle's high-voltage power supply is on and the power and battery systems are fault-free; the fuel cell engine and hydrogen system are fault-free and providing normal status feedback; the power battery is partially charged (i.e., less than 90% remaining charge); and the power battery is capable of charging and discharging. When all of these conditions are met, the fuel cell engine begins operation. Once the fuel cell engine is started and operating stably, the VCU enters the energy recovery phase, obtaining the available power and target power for energy recovery.

[0051] In one embodiment, the available power is calculated by the following formula:

[0052]

[0053] in, is the available power; Allowable charging power for the battery; Output power to the battery engine.

[0054] In this embodiment, Reflects the energy receiving capacity of the battery in the current state, which is a negative value; This value represents the energy supply capacity of the system and is a positive value. Specifically, when the fuel cell engine is not started, the vehicle's available power is the power allowed by the power battery.

[0055] The method of the present invention realizes the coordinated calculation of charging and discharging power through the above operations, thereby ensuring the integrity of the system energy flow.

[0056] In one embodiment, the target power is calculated by the following formula:

[0057]

[0058] in, is the target power; is the target torque; is the motor speed.

[0059] Specifically, energy recovery adopts the vehicle speed-torque curve setting method, that is, the target torque changes with the change of vehicle speed, and finally the target power is calculated by the target torque and the actual speed of the motor, where the target torque is <0.

[0060] The method of the present invention calculates the target power through the above formula, comprehensively considers the target torque and motor speed, and can achieve precise control of the motor power, providing efficient and reliable technical support for energy recovery and motor control.

[0061] Step 102: Determine whether the available power is greater than the target power;

[0062] In actual use, the target power is compared with the vehicle's available power to determine whether the vehicle's current available power can meet the vehicle's target power requirement. If so, the target power ≥ available power; if not, the target power < available power.

[0063] Step 103: When the available power is less than or equal to the target power, energy recovery is performed according to the target power;

[0064] In this embodiment, when the available power is less than or equal to the target power, it means that the battery available power meets the target power requirement of the vehicle, and the target power of energy recovery is then executed.

[0065] Step 104: When the available power is greater than the target power, calculate the average power difference accumulated for a preset number of times, where the power difference is the difference between the target power and the available power; output the actual available power based on the average power difference, and perform energy recovery based on the actual available power.

[0066] In one embodiment, outputting actual available power according to the average power difference includes:

[0067] Obtaining the limited power according to the average power difference;

[0068] The actual available power is output according to the limited power.

[0069] In actual use, the average power difference is the average value of the power differences of a preset number of times. Specifically, three power difference average calculations can be used to meet the control requirement that the fuel cell engine cannot adjust the output power at any time, avoid the lack of adaptability of a single calculation to the working conditions, and affect the vehicle's dynamics. In this embodiment, using three times can also avoid too many calculations, increase the power difference calculation time, and affect the energy recovery rate.

[0070] The method of the present invention obtains the limited power according to the average power difference and outputs the actual available power according to the limited power, thereby realizing dynamic adjustment and optimization of the available power of the battery system, improving the energy utilization efficiency of the battery system, and protecting the safety and life of the battery system.

[0071] In one embodiment, the limit power is obtained according to the average power difference and is calculated using the following formula:

[0072]

[0073] in, To limit power; Output power for the battery engine; is the average power difference.

[0074] In this embodiment, the power is limited In actual use, such as Figure 3 As shown in the fuel cell engine efficiency curve, reducing the fuel cell engine power can improve the fuel cell engine operating efficiency and further improve the vehicle energy consumption level.

[0075] The method of the present invention obtains the limit power by using the average power difference, which can achieve dynamic adjustment of the battery system's available power. When the average power difference is large, it indicates that there is a large difference between the battery system's power output and demand. In this case, the limit power can be appropriately lowered to reduce the battery system's power output and avoid overcharging or over-discharging the battery. When the average power difference is small, it indicates that the difference between the battery system's power output and demand is small. In this case, the limit power can be appropriately increased to increase the battery system's power output and meet the vehicle's driving needs.

[0076] In one embodiment, the actual available power is calculated according to the limited power output using the following formula:

[0077]

[0078] in, is the actual available power; is the available power; To limit power.

[0079] Specifically, , indicating that after limiting the fuel cell engine power, the vehicle's available power increases.

[0080] The method of the present invention ensures that the battery system operates within a safe range by limiting the actual available power output. Power limitation takes into account the safe operating range of the battery system. By outputting the actual available power based on the limited power, the battery system is prevented from operating outside its safe operating range, thereby protecting the safety and life of the battery system.

[0081] In one embodiment, calculating the average power difference accumulated for a preset number of times includes:

[0082] When the available power is greater than the target power, the current power difference of the vehicle is recorded. When the cumulative number of times reaches a preset number, the average power difference is calculated for the recorded power differences.

[0083] In this embodiment, the vehicle enters energy recovery and calculates the current power difference .like , then no record is made. If , then the power difference at this time is recorded as ; Same processing method, the vehicle enters energy recovery next time and meets Time recording power difference ; Enter energy recovery for the third time and meet Time recording power difference The average power difference for:

[0084]

[0085] The method of the present invention achieves dynamic adjustment of power output by repeatedly recording and calculating the average power difference when the available power exceeds the target power. This not only accurately reflects the actual deviation of the system power, but also effectively avoids misjudgments caused by single power fluctuations. Through multiple sampling and averaging, the present invention can more accurately determine the actual available power, significantly improving the stability and reliability of the system.

[0086] The fuel cell vehicle energy recovery control method provided by an embodiment of the present invention first obtains the available power and target power for energy recovery; then determines whether the available power is greater than the target power; if the available power is less than or equal to the target power, energy recovery is performed according to the target power; or, if the available power is greater than the target power, the average power difference accumulated over a preset number of times is calculated, where the power difference is the difference between the target power and the available power; the actual available power is output based on the average power difference, and energy recovery is performed based on the actual available power. When the available power is greater than the target power, the present invention limits the output power of the fuel cell by accumulating the average power difference over a preset number of times. This method can accurately match the energy recovery power requirements under actual operating conditions, effectively reducing the output power of the fuel cell engine, while improving the vehicle's energy recovery efficiency and reducing the frequency of engine power switching. This improvement not only helps extend the service life of the fuel cell engine, but also better meets the vehicle's driving power requirements, ensuring that the vehicle's dynamic performance is fully guaranteed. Furthermore, by optimizing power management, this method can significantly improve the operating efficiency of the fuel cell engine, reduce the vehicle's operating energy consumption, and thus reduce operating costs, while further optimizing the vehicle's overall energy consumption. More importantly, it can effectively avoid power battery overcharging and fuel cell engine overvoltage failure caused by high-power energy recovery, thereby enhancing the reliability and safety of the system.

[0087] Based on the above Figure 1 The fuel cell vehicle energy recovery control method described in the corresponding embodiment is as follows: an embodiment of the device of the present invention, which can be used to execute the embodiment of the method of the present invention.

[0088] The fuel cell vehicle energy recovery control device provided by the embodiment of the present invention is as follows: Figure 4 As shown, the device includes:

[0089] An acquisition module 201 is used to acquire available power and target power for energy recovery;

[0090] A determination module 202 is configured to determine whether the available power is greater than the target power;

[0091] The processing module 203 is used to perform energy recovery according to the target power when the judgment result of the judgment module 202 is no; or when the judgment result of the judgment module 202 is yes, calculate the average power difference accumulated for a preset number of times, where the power difference is the difference between the target power and the available power; output the actual available power according to the average power difference, and perform energy recovery according to the actual available power.

[0092] The fuel cell vehicle energy recovery control device provided by an embodiment of the present invention includes an acquisition module 201, a judgment module 202, and a processing module 203; the acquisition module 201 acquires the available power and target power for energy recovery; the judgment module 202 determines whether the available power is greater than the target power; the processing module 203 performs energy recovery according to the target power when the judgment module 202 determines that the result is negative; or, when the judgment module 202 determines that the result is positive, calculates the average power difference accumulated over a preset number of times, where the power difference is the difference between the target power and the available power; outputs the actual available power based on the average power difference, and performs energy recovery based on the actual available power. When the available power is greater than the target power, the present invention limits the output power of the fuel cell by accumulating the average value of the power difference over a preset number of times. The present invention can accurately match the energy recovery power requirements in actual operating conditions, thereby effectively reducing the output power of the fuel cell engine, while improving the vehicle's energy recovery efficiency and reducing the frequency of engine power switching. This improvement not only helps to extend the service life of the fuel cell engine, but also better meets the power requirements of the vehicle drive, ensuring that the vehicle's power performance is fully guaranteed. Furthermore, by optimizing power management, this invention significantly improves the fuel cell engine's operating efficiency, reduces the vehicle's operating energy consumption, and thus reduces operating costs, while further optimizing the vehicle's overall energy consumption. More importantly, it effectively prevents power battery overcharging and fuel cell engine overvoltage failures caused by high-power energy recovery, thereby enhancing system reliability and safety.

[0093] Based on the above Figure 1 In accordance with the fuel cell vehicle energy recovery control method described in the embodiment, another embodiment of the present invention further provides a fuel cell vehicle energy recovery control device, the fuel cell vehicle energy recovery control device includes a processor and a memory, the memory stores at least one computer instruction, the instruction is loaded and executed by the processor to implement the above Figure 1 The fuel cell vehicle energy recovery control method described in the corresponding embodiment.

[0094] Based on the above Figure 1 In accordance with the fuel cell vehicle energy recovery control method described in the embodiment, the present invention also provides a computer-readable storage medium. For example, the non-transitory computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, or an optical data storage device. The storage medium stores at least one computer instruction for executing the above-mentioned Figure 1 The energy recovery control method for a fuel cell vehicle described in the corresponding embodiment will not be described in detail here.

[0095] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the claims.

[0096] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A fuel cell vehicle energy recovery control method, characterized in that: The method comprises: Obtaining available power and target power of energy recovery, where both the available power and the target power are negative values; Determining whether the available power is greater than the target power; If not, performing energy recovery according to the target power; If yes, calculating an average power difference accumulated for a preset number of times, where the power difference is the difference between the target power and the available power; outputting actual available power according to the average power difference, and performing energy recovery according to the actual available power; The step of calculating the average power difference accumulated for a preset number of times includes: When the available power is greater than the target power, the current power difference of the vehicle is recorded, and when the cumulative number of times reaches a preset number, an average power difference is calculated for the recorded power differences; Outputting the actual available power according to the average power difference includes: Obtaining a limited power according to the average power difference; The actual available power is output according to the limited power.

2. The fuel cell vehicle energy recovery control method according to claim 1, characterized in that: The available power is calculated using a first formula, which includes: in, is the available power, which is a negative value; Allowable charging power for the battery, a negative value; is the battery engine output power, which is a positive value.

3. The fuel cell vehicle energy recovery control method according to claim 1, characterized in that: The target power is calculated using a second formula, which includes: in, is the target power, which is a negative value; is the target torque, which is a negative value; is the motor speed.

4. The fuel cell vehicle energy recovery control method according to claim 1, characterized in that: The limiting power is obtained according to the average power difference and is calculated using a third formula, wherein the third formula includes: in, To limit the power, it is a positive value; is the battery engine output power, which is a positive value; is the average power difference, which is a negative value.

5. The fuel cell vehicle energy recovery control method according to claim 1, characterized in that: The actual available power output according to the limited power is calculated by a fourth formula, and the fourth formula includes: in, is the actual available power, which is a negative value; is the available power, which is a negative value; To limit the power, it is a positive value.

6. A fuel cell vehicle energy recovery control device, characterized in that: include: An acquisition module, used to obtain available power and target power for energy recovery; A judging module, configured to judge whether the available power is greater than the target power; a processing module, configured to perform energy recovery according to the target power when the result of the judgment module is no; Alternatively, when the result of the judgment module is yes, the average power difference accumulated for a preset number of times is calculated, where the power difference is the difference between the target power and the available power; the actual available power is output according to the average power difference, and energy recovery is performed according to the actual available power.

7. A fuel cell vehicle energy recovery control device, characterized in that: The fuel cell vehicle energy recovery control device includes a processor and a memory, wherein the memory stores at least one computer instruction, and the instruction is loaded and executed by the processor to implement the steps performed in the fuel cell vehicle energy recovery control method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that The storage medium stores at least one computer instruction, which is loaded and executed by the processor to implement the steps performed in the fuel cell vehicle energy recovery control method according to any one of claims 1 to 5.

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