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

Abstract

The invention discloses a fuel cell vehicle energy recovery control method, device and equipment and a storage medium, relates to the technical field of new energy vehicles, and can solve the problem of high vehicle energy consumption caused by insufficient energy recovery capability of a fuel cell commercial vehicle in the prior art. According to the specific technical scheme, available power and target power of energy recovery are obtained; judging whether the available power is greater than target power; if not, energy recovery is carried out according to the target power; if yes, the average power difference of the preset number of accumulated times is calculated, actual available power is output according to the average power difference, and energy is recycled according to the actual available power. Under the condition that the available power is greater than the target power, the output power of the fuel cell is limited by accumulating the average value of the power differences of the preset times. According to the method, the energy recovery power requirement in the actual operation working condition can be accurately matched, the output power of the fuel cell engine is effectively reduced, the energy recovery efficiency of the vehicle is improved, and the power switching frequency of the engine is reduced.

Description

Technical Field

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

[0002] In recent years, with the global energy structure transformation and the increasingly urgent need for environmental protection, the new energy vehicle industry has entered a period of rapid development. Among the many new energy vehicle technology routes, fuel cell vehicles have become an important direction for the sustainable development of the future automotive industry with their significant advantages such as zero emissions and high efficiency, and have received widespread attention from the industry.

[0003] However, fuel cell vehicles still face technical challenges in energy recovery. When the target power of vehicle braking energy recovery exceeds the system's allowable range, in order to prevent overcharging of the power battery and avoid accelerated aging of the fuel cell engine due to frequent load changes, the existing technology usually adopts a strategy of reducing the energy recovery power. Although this strategy ensures system safety, it also brings new problems: on the one hand, the fuel cell engine needs to maintain operation at a relatively stable power point (usually for minutes), and frequent power fluctuations will 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 utilize the vehicle's energy recovery efficiency, which ultimately affects the economy and environmental protection of the entire vehicle operation. 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 high vehicle energy consumption caused by insufficient energy recovery capacity of fuel cell commercial vehicles in the prior art. 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] Obtain 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 the embodiment of the present invention first obtains the available power and target power of energy recovery; then determines whether the available power is greater than the target power; when the available power is less than or equal to the target power, energy recovery is performed according to the target power; or, when the available power is greater than the target power, the average power difference accumulated for a preset number of times is calculated, and 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. 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 the actual operating conditions, thereby effectively reducing the output power of the fuel cell engine, while improving the energy recovery efficiency of the vehicle, 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 meet the power demand of the vehicle drive, ensuring that the power performance of the vehicle is fully guaranteed. In addition, by optimizing power management, the method can significantly improve the operating efficiency of the fuel cell engine, reduce the operating energy consumption of the vehicle, thereby reducing operating costs, and further optimize the overall energy consumption level of the vehicle. More importantly, it can effectively avoid overcharging of power batteries and overvoltage failure of fuel cell engines 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, and the first formula 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 energy flow of the system.

[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, can realize accurate control of the motor power, and provides 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] Acquire the 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 by a third formula, and the third formula includes:

[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 limiting power through the average power difference, and can realize the dynamic adjustment of the available power of the battery system. When the average power difference is large, it means that there is a large difference between the power output of the battery system and the demand. At this time, the limiting power can be appropriately reduced to reduce the power output of the battery system and avoid overcharging or over-discharging of the battery; when the average power difference is small, it means that the difference between the power output of the battery system and the demand is small. At this time, the limiting power can be appropriately increased to increase the power output of the battery system to meet the driving needs of the vehicle.

[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 can ensure that the battery system operates within a safe range by limiting the actual available power of the power output. The power limitation takes into account the safe operating range of the battery system. By outputting the actual available power according to the limited power, the battery system can be prevented from operating beyond its safe operating range, thereby protecting the safety and life of the battery system.

[0031] As a further solution of the present invention: the step of calculating 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 of times, an average power difference is calculated for the recorded power differences.

[0033] The method of the present invention realizes dynamic adjustment of power output by repeatedly recording and calculating the average power difference when the available power is greater than the target power. It can not only accurately reflect the actual deviation of the system power, but also effectively avoid misjudgment caused by a single power fluctuation. Through multiple sampling and averaging processing, the present invention can more accurately determine the actual available power, thereby 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 acquire available power and target power of energy recovery;

[0036] A judging module, used for judging whether the available power is greater than the target power;

[0037] A processing module is used to, when the result of the judgment module is no, perform energy recovery according to the target power; or, when the result of the judgment module is yes, calculate the average power difference accumulated for a preset number of times, wherein 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.

[0038] The fuel cell vehicle energy recovery control device provided by the 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 of energy recovery; the judgment module judges whether the available power is greater than the target power; the processing module performs 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, calculates the average power difference accumulated for a preset number of times, the power difference being the difference between the target power and the available power; outputs the actual available power according to the average power difference, and performs energy recovery 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. The present invention can accurately match the energy recovery power demand in the actual operating conditions, thereby effectively reducing the output power of the fuel cell engine, while improving the energy recovery efficiency of the vehicle, 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 meet the power demand of the vehicle drive, ensuring that the power performance of the vehicle is fully guaranteed. In addition, by optimizing power management, the present invention can significantly improve the operating efficiency of the fuel cell engine, reduce the operating energy consumption of the vehicle, thereby reducing the operating cost, and further optimize the overall energy consumption level of the vehicle. More importantly, it can effectively avoid overcharging of power batteries and overvoltage failure of fuel cell engines 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 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 at least one computer instruction is stored in the storage medium, and the instruction 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 both 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 is a flow chart of a fuel cell vehicle energy recovery control method provided by an embodiment of the present invention;

[0044] Figure 2 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 a fuel cell system efficiency curve 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 in an embodiment of the present invention. DETAILED DESCRIPTION

[0047] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the 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 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, obtaining available power and target power of energy recovery;

[0050] In this embodiment, Figure 2 As shown, the vehicle controller VCU first obtains the current vehicle status to ensure that all vehicle sensors are in normal working condition and have no faults. Subsequently, the VCU receives status and parameter feedback from components such as the drive motor, power battery, gearbox, fuel cell engine, and hydrogen system, and confirms that each system is working properly, while ensuring that the vehicle's high-voltage power-up is completed. On this basis, the VCU further determines whether the fuel cell engine meets the start-up conditions, including: the vehicle is powered on at high voltage and the power and battery systems are fault-free; the fuel cell engine and hydrogen system are fault-free and the status feedback is normal; the power battery is not fully charged (that is, the remaining power is less than 90%); the power battery has charge / discharge capabilities. When the above conditions are met at the same time, the fuel cell engine will start working. After the fuel cell engine starts and runs stably, the VCU immediately enters the energy recovery stage to obtain the available power and target power of 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 for the battery engine.

[0054] In this embodiment, Reflects the energy receiving capacity of the battery in the current state, which is a negative value; Characterizes the energy supply capacity of the system, which is a positive value. Specifically, when the fuel cell engine is not started, the available power of the vehicle is the charging 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 energy flow of the system.

[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 a 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, can realize accurate control of the motor power, and provides 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 available power of the battery 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 according to the average power difference, and perform energy recovery according to 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, the 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 by 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 limiting power through the average power difference, and can realize the dynamic adjustment of the available power of the battery system. When the average power difference is large, it means that there is a large difference between the power output of the battery system and the demand. At this time, the limiting power can be appropriately reduced to reduce the power output of the battery system and avoid overcharging or over-discharging of the battery; when the average power difference is small, it means that the difference between the power output of the battery system and the demand is small. At this time, the limiting power can be appropriately increased to increase the power output of the battery system to meet the driving needs of the vehicle.

[0076] In one embodiment, the actual available power is calculated according to the limited power output by 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 can ensure that the battery system operates within a safe range by limiting the actual available power of the power output. The power limitation takes into account the safe operating range of the battery system. By outputting the actual available power according to the limited power, the battery system can be prevented from operating beyond 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, and when the accumulated 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 it will not be recorded. , then the power difference at this time is recorded as ; Same processing method, the next time the vehicle enters energy recovery and meets Record power difference ; The third time enters energy recovery and meets Record power difference The average power difference for:

[0084]

[0085] The method of the present invention realizes dynamic adjustment of power output by repeatedly recording and calculating the average power difference when the available power is greater than the target power. It can not only accurately reflect the actual deviation of the system power, but also effectively avoid misjudgment caused by a single power fluctuation. Through multiple sampling and averaging processing, the present invention can more accurately determine the actual available power, thereby significantly improving the stability and reliability of the system.

[0086] The fuel cell vehicle energy recovery control method provided by the embodiment of the present invention first obtains the available power and target power of energy recovery; then determines whether the available power is greater than the target power; when the available power is less than or equal to the target power, energy recovery is performed according to the target power; or, when the available power is greater than the target power, the average power difference accumulated for a preset number of times is calculated, and 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. 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 the actual operating conditions, thereby effectively reducing the output power of the fuel cell engine, while improving the energy recovery efficiency of the vehicle, 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 meet the power demand of the vehicle drive, ensuring that the power performance of the vehicle is fully guaranteed. In addition, by optimizing power management, the method can significantly improve the operating efficiency of the fuel cell engine, reduce the operating energy consumption of the vehicle, thereby reducing operating costs, and further optimize the overall energy consumption level of the vehicle. More importantly, it can effectively avoid overcharging of power batteries and overvoltage failure of fuel cell engines 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 energy recovery control device for a fuel cell vehicle provided by the embodiment of the present invention is as follows: Figure 4 As shown, the device comprises:

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

[0090] A determination module 202 is used 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, the power difference being 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 the 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 of energy recovery; the judgment module 202 judges 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 result of the judgment module 202 is no; or, when the judgment result of the judgment module 202 is yes, calculates the average power difference accumulated for a preset number of times, the power difference being the difference between the target power and the available power; outputs the actual available power according to the average power difference, and performs energy recovery 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. The present invention can accurately match the energy recovery power demand in the actual operating conditions, thereby effectively reducing the output power of the fuel cell engine, while improving the energy recovery efficiency of the vehicle, 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 meet the power demand of the vehicle drive, ensuring that the power performance of the vehicle is fully guaranteed. In addition, by optimizing power management, the present invention can significantly improve the operating efficiency of the fuel cell engine, reduce the operating energy consumption of the vehicle, and thus reduce the operating cost, while further optimizing the overall energy consumption level of the vehicle. More importantly, it can effectively avoid the overcharging of the power battery and the overvoltage failure of the fuel cell engine caused by high-power energy recovery, thereby enhancing the reliability and safety of the system.

[0093] Based on the above Figure 1 Corresponding to the fuel cell vehicle energy recovery control method described in the embodiment, another embodiment of the present invention also 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 corresponding embodiment, the embodiment of the present invention further provides a computer-readable storage medium, for example, the non-temporary 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, and an optical data storage device. The storage medium stores at least one computer instruction for executing the above 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 disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present invention are indicated by the claims.

[0096] It should be understood that the present invention is not limited to the exact construction that has been 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: Obtain available power and target power of energy recovery; Determining whether the available power is greater than the target power; If not, performing energy recovery according to the target power; 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.

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

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

4. The fuel cell vehicle energy recovery control method according to claim 1, characterized in that: Outputting the actual available power according to the average power difference includes: Acquire the limited power according to the average power difference; The actual available power is output according to the limited power.

5. The fuel cell vehicle energy recovery control method according to claim 4, characterized in that: The limiting power is obtained according to the average power difference and calculated by a third formula, wherein the third formula includes: in, To limit power; Output power for the battery engine; is the average power difference.

6. The fuel cell vehicle energy recovery control method according to claim 4, 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; is the available power; To limit power.

7. The fuel cell vehicle energy recovery control method according to claim 1, characterized in that: The calculating of 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 accumulated number of times reaches a preset number of times, an average power difference is calculated for the recorded power differences.

8. A fuel cell vehicle energy recovery control device, characterized in that: include: An acquisition module, used to acquire available power and target power of energy recovery; A judging module, used for judging 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; Or, when the result of the judgment module is yes, the average power difference accumulated for a preset number of times is calculated, and 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.

9. 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 described in any one of claims 1 to 7.

10. 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 7.

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