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

Abstract

The application provides a fuel cell vehicle energy control method, device, storage medium and vehicle. The control method comprises the following steps: obtaining a vehicle demand power, a battery peak output power and a fuel cell output power according to a current battery SOC range calibration; obtaining a vehicle demand fuel power value according to the obtained vehicle demand power and the battery peak output power; performing gradient loading of the fuel cell output power when the vehicle demand fuel power is greater than the fuel cell output power; and controlling the fuel cell to output according to the loaded fuel cell output power. The fuel cell vehicle energy control method can reduce the variable load demand borne by the battery, improve the power response capability of the fuel cell, and improve the overall quality of the fuel cell vehicle.

Description

Fuel cell vehicle energy control methods, devices and storage media and vehicles Technical Field

[0001] This invention relates to the field of energy management technology for fuel cell vehicles, and particularly to an energy control method for fuel cell vehicles. The invention also relates to an energy control method for fuel cell vehicles, a computer-readable storage medium, and a hydrogen fuel cell vehicle equipped with the aforementioned energy control device. Background Technology

[0002] With the continuous development of automotive technology, new energy vehicles are receiving increasing attention from major automakers. Among them, hydrogen fuel cell vehicles have a very broad prospect due to their fast and convenient hydrogen refueling process and the fact that they have truly achieved the goal of "zero emissions." In hydrogen fuel cell vehicles, their operating economy is closely related to energy management strategies. Furthermore, since the power output of the fuel cell cannot fully cover the power requirements of the entire vehicle, existing fuel cell vehicles typically adopt a fuel cell-battery hybrid power system structure. By adding a battery, both the fuel cell and the battery provide the necessary power to the vehicle simultaneously, satisfying the vehicle's power requirements, the energy consumption of fuel cell startup, and the recovery of braking energy, thereby improving the overall vehicle economy.

[0003] Currently, to avoid frequent load changes in fuel cell power, most existing energy management strategies for fuel cell vehicles calibrate fuel cell power values ​​based on battery SOC (State of Charge, reflecting the battery's remaining capacity, numerically defined as the ratio of remaining capacity to battery capacity, usually expressed as a percentage) ranges. The lower the battery SOC, the higher the fuel cell power output. With the battery acting as a frequently changing energy source, the fuel cell outputs a constant power within the set SOC range, reducing the vehicle's demands on fuel cell power and transient performance, and allowing the fuel cell system to operate in a more temperate environment.

[0004] However, existing fuel cell vehicles also have the following shortcomings in energy management:

[0005] When the vehicle demands high power, the battery provides the power response. However, since it takes time for the battery's state of charge (SOC) to decrease to the next range, the fuel cell can only output a constant power during this process. This can result in a situation where the battery has reached its peak discharge power, but the fuel cell has not yet reached its rated or maximum power output. In this case, the maximum achievable output power of the vehicle will be reduced, and the overall vehicle performance will be significantly decreased, resulting in limited vehicle power and insufficient power response.

[0006] In the current management system, the battery is primarily responsible for bearing the load changes of fuel cell vehicles, and these changes are frequent and significant, placing a heavy burden on the battery and reducing its lifespan. Furthermore, when the vehicle has high power demands, the battery's response to high power output, even peak discharge, can easily cause the battery temperature to rise too quickly, leading to overheating. In addition, the vehicle cannot manage energy based on the power efficiency characteristics of the fuel cell system, and cannot appropriately adjust the load on the fuel cell. This results in low fuel cell power response capability and poor flexibility, impacting the vehicle's overall performance. Summary of the Invention

[0007] In view of this, the present invention aims to propose an energy control method for fuel cell vehicles, which can reduce the variable load demand borne by the battery and improve the power response capability of the fuel cell.

[0008] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0009] A method for energy control of a fuel cell vehicle, the method comprising:

[0010] Obtain the required power of the vehicle, the peak output power of the battery, and the output power of the fuel cell calibrated according to the current battery SOC range;

[0011] Based on the obtained vehicle power demand and battery peak output power, the vehicle power demand is calculated.

[0012] When the required fuel cell power of the vehicle is greater than the output power of the fuel cell, the output power of the fuel cell is applied.

[0013] The fuel cell is controlled to output power according to the fuel cell output power after loading;

[0014] The loading of the fuel cell output power includes:

[0015] The output power of the fuel cell is increased by PxkW according to a preset power gradient AkW / s;

[0016] Determine whether the output power of the fuel cell after increasing PxkW is not less than the current fuel-electric power required by the vehicle as calculated in real time.

[0017] If the output power of the fuel cell after increasing by PxkW is less than the current vehicle's required fuel power, the process of increasing the fuel cell output power by PxkW at least once according to the preset power gradient AkW / s is repeated until the output power of the fuel cell after the power increase is not less than the current vehicle's required fuel power obtained in real time.

[0018] Furthermore, the control method also includes:

[0019] When the required fuel cell power of the vehicle is less than the output power of the fuel cell, the output power of the fuel cell is reduced, and the fuel cell is controlled to output according to the reduced output power of the fuel cell.

[0020] The reduction of the fuel cell output power includes:

[0021] The output power of the fuel cell is reduced by PxkW according to a preset power gradient of BkW / s;

[0022] Determine whether the output power of the fuel cell after reducing PxkW is not greater than the current fuel-electric power demand of the vehicle obtained in real time;

[0023] If the fuel cell output power after reducing PxkW is greater than the current vehicle's required fuel-electric power and the fuel cell output power calibrated according to the current battery SOC range, the process of reducing the fuel cell output power by PxkW at least once according to the preset power gradient BkW / s is repeated until the fuel cell output power after power reduction is not greater than the current vehicle's required fuel-electric power obtained in real time and is not greater than the fuel cell output power calibrated according to the current battery SOC range.

[0024] Furthermore, the control method also includes:

[0025] After the fuel cell output power is loaded or unloaded, the fuel cell is controlled to continuously output a first preset time threshold according to the fuel cell output power after loading or unloading.

[0026] Furthermore, the control method also includes:

[0027] Within a first preset time threshold during which the fuel cell continuously outputs its power according to the loading or unloading conditions, it is determined whether the vehicle's required fuel-electric power value is greater than the first preset power threshold within a second preset time threshold.

[0028] When the required fuel cell power for the entire vehicle is greater than the first preset power threshold for a continuous second preset time threshold, the fuel cell output power is applied after the first preset time threshold has been continuously output; and / or,

[0029] Within a first preset time threshold during which the fuel cell continuously outputs its power after loading or unloading, it is determined whether the rate of decrease in battery SOC is greater than the first preset threshold.

[0030] When the rate of decrease of the battery's state of charge (SOC) exceeds a first preset threshold, the fuel cell output power is applied after a first preset time threshold is continuously output.

[0031] Furthermore, the control method also includes:

[0032] Within a first preset time threshold during which the fuel cell continuously outputs its power according to the fuel cell output power after loading or unloading, it is determined whether the fuel cell output power is greater than the current allowable charging power of the battery.

[0033] When the fuel cell output power exceeds the battery's current allowable charging power, the vehicle power is limited; and / or,

[0034] Within a first preset time threshold during which the fuel cell continuously outputs its power after loading or unloading, it is determined whether the battery SOC increase rate is greater than a second preset threshold.

[0035] When the rate of increase of the battery's state of charge (SOC) exceeds a second preset threshold, the output power of the fuel cell is reduced.

[0036] Furthermore, the control method also includes:

[0037] Obtain battery SOC, vehicle speed, throttle opening, and total vehicle power demand;

[0038] When the battery SOC is not less than a preset SOC threshold, the vehicle speed is not greater than a preset vehicle speed threshold, the throttle opening is not greater than a preset opening threshold, and the vehicle's required power is not greater than a second preset power threshold, the fuel cell is controlled not to start.

[0039] Compared with existing technologies, the fuel cell vehicle energy control method of the present invention has the following advantages:

[0040] The fuel cell vehicle energy control method of the present invention calculates the required fuel cell power value of the vehicle based on the vehicle's required power, the peak output power of the battery, and the output power of the fuel cell calibrated according to the current battery SOC range. When the required fuel cell power of the vehicle is greater than the output power of the fuel cell, a gradient loading of the fuel cell output power is performed to meet the vehicle's power requirements by adjusting the output power of the fuel cell.

[0041] Therefore, the energy control method for fuel cell vehicles of the present invention can reduce the variable load requirements borne by the battery, and at the same time, it can improve the slow power response speed of the fuel cell by utilizing the gradient adjustment of the fuel cell output power, thereby enhancing the power response capability of the fuel cell. In this way, combined with the battery capability, the overall vehicle power performance can be improved, and the overall quality of the fuel cell vehicle can be enhanced.

[0042] Another object of the present invention is to provide an energy control device for a fuel cell vehicle, the control device comprising an acquisition module, a storage module, a calculation module and a control module;

[0043] The acquisition module is used to acquire the vehicle's required power, the battery's peak output power, and the current battery SOC range.

[0044] The storage module is used to store the fuel cell output power calibrated under different battery SOC ranges;

[0045] The calculation module is used to calculate the required fuel-electric power value of the vehicle based on the obtained vehicle power demand and the peak output power of the battery.

[0046] The control module is used to load the fuel cell output power when the vehicle's required fuel cell power is greater than the fuel cell output power, and control the fuel cell to output according to the loaded fuel cell output power; or, when the vehicle's required fuel cell power is less than the fuel cell output power, to reduce the fuel cell output power, and control the fuel cell to output according to the reduced fuel cell output power.

[0047] Furthermore, the control device also includes a timing module;

[0048] After the fuel cell output power is loaded or unloaded, the control module is also used to control the fuel cell to continuously output a first preset time threshold according to the fuel cell output power after loading or unloading.

[0049] In addition, the present invention also proposes a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the energy control method for fuel cell vehicles as described above.

[0050] In addition, the present invention also proposes a fuel cell vehicle, wherein the fuel cell vehicle is equipped with the fuel cell vehicle energy control device as described above.

[0051] The fuel cell vehicle energy control device, computer-readable storage medium, and fuel cell vehicle described in this invention have the same beneficial effects as the aforementioned fuel cell vehicle energy control method compared to the prior art, and will not be repeated here. Attached Figure Description

[0052] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0053] Figure 1 is a flowchart of the loading process of the fuel cell vehicle energy control method according to an embodiment of the present invention;

[0054] Figure 2 is a flowchart of the fuel cell vehicle energy control method during load reduction according to an embodiment of the present invention;

[0055] Figure 3 is a schematic diagram of the structure of the fuel cell vehicle energy control device according to an embodiment of the present invention;

[0056] Explanation of reference numerals in the attached figures:

[0057] 10. Control module; 20. Acquisition module; 30. Storage module; 40. Calculation module; 50. Timing module. Detailed Implementation

[0058] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0059] In the description of this invention, it should be noted that the use of terms such as "upper," "lower," "inner," and "outer," indicating orientation or positional relationship, is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the use of terms such as "first" and "second" is also for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] Furthermore, in the description of this invention, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0061] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0062] Example 1

[0063] This embodiment relates to an energy control method for fuel cell vehicles, which is applied to fuel cell vehicles using a fuel cell-battery hybrid power system. In this type of fuel cell vehicle, by adding a battery, the vehicle can be powered by both the fuel cell and the battery simultaneously, thereby satisfying the vehicle's power requirements.

[0064] Based on the diagram in Figure 1, the overall design of the fuel cell vehicle energy control method in this embodiment includes the following steps:

[0065] Step s01: Obtain the required power of the vehicle, the peak output power of the battery, and the output power of the fuel cell calibrated according to the current SOC range of the battery.

[0066] Specifically, both the vehicle's required power and the battery's peak output power can be obtained from the battery management system (EMS). For the fuel cell output power calibrated based on the battery's state of charge (SOC) range, generally, in fuel cell vehicles, the common power point of the fuel cell system is evaluated primarily based on the vehicle's operating conditions, using the vehicle's typical speed and battery output capacity. This calibrates the fuel cell output power for different battery SOC ranges, which is then used for basic control of the fuel cell system's operation.

[0067] Furthermore, the rated output power of the fuel cell should generally decrease gradually as the battery's State of Charge (SOC) increases, as shown in Table 1 below: P1 > P2 > P3 > P4 > P5 > P6. It should also be noted that when the battery SOC exceeds a certain range, the fuel cell system should be shut down or its output controlled to zero to avoid overcharging. In addition, to achieve better control, the number of battery SOC segments should be minimized to avoid frequent changes in fuel cell output power, effectively reducing the load requirements of the fuel cell system and extending the fuel cell's lifespan.

[0068] In practical implementation, the SOC range of different batteries, i.e., the corresponding fuel cell output power, can be calibrated as shown in Table 1 below. Moreover, P1-P6 in Table 1 can be set according to the specific fuel cell system, battery system, and vehicle control requirements. At the same time, as mentioned above, the setting should satisfy P1 > P2 > P3 > P4 > P5 > P6. When the battery SOC exceeds a certain range (e.g., 90%), the fuel cell power output should be stopped.

[0069] Table 1. Fuel cell output power under different battery SOC ranges

[0070]

[0071]

[0072] The calibration data in Table 1 or similar is preset in the memory of the vehicle battery management system. By calling the preset data in the memory, the fuel cell output power corresponding to the current battery SOC range can be obtained, which is the required fuel cell output power calibrated according to the current battery SOC range.

[0073] Step s02: Calculate the required fuel-electric power value of the vehicle based on the obtained vehicle power demand and battery peak output power.

[0074] Specifically, since the power required by the vehicle is provided by both the battery and the fuel cell as power sources, the power required by the fuel cell can be obtained by subtracting the power required by the vehicle from the current peak output power of the battery. This is the power that the fuel cell should output to meet the power required by the vehicle, taking into account the working conditions of the battery.

[0075] Step s031: When the required fuel cell power of the vehicle is greater than the output power of the fuel cell, the fuel cell output power is applied.

[0076] Specifically, if the power demanded by the vehicle is greater than the output power of the fuel cell, it means that the current output power of the fuel cell cannot meet the power demand of the vehicle. In this case, it is necessary to increase the power output of the fuel cell by loading its output power to meet the power demand of the vehicle.

[0077] Step s041: Control the fuel cell to output power according to the fuel cell output power after loading.

[0078] At this point, after the output power of the fuel cell increases, it can meet the power requirements of the entire vehicle, so the fuel cell can output according to the loaded output power value.

[0079] Based on the overall introduction of the control method of this embodiment above, the loading of the fuel cell output power in step s031 specifically includes the following steps.

[0080] Step s311: Increase the fuel cell output power by PxkW according to the preset power gradient AkW / s;

[0081] Step s312: Determine whether the output power of the fuel cell after increasing PxkW is not less than the current fuel cell power required by the vehicle as calculated in real time;

[0082] Step s313: When the fuel cell output power after increasing PxkW is less than the current vehicle's required fuel-electric power, repeat the process of increasing the fuel cell output power by PxkW at least once according to the preset power gradient AkW / s until the fuel cell output power after the power increase is not less than the current vehicle's required fuel-electric power obtained in real time.

[0083] At this point, the aforementioned preset power gradient AkW / s can be, for example, 5kW / s, and the increase in fuel cell output power PxkW can be, for example, 10kW / cycle. Furthermore, it should be noted that in step s312 above, the "real-time calculated current vehicle fuel cell power demand" refers to the current vehicle fuel cell power demand calculated based on the real-time acquisition of the vehicle's power demand, the battery's peak output power, and the fuel cell output power calibration value corresponding to the current battery SOC range.

[0084] In this way, by comparing the output power of the fuel cell after loading with the current fuel-electric power required by the vehicle, it is possible to determine whether the increase in the output power of the fuel cell is appropriate, and to stop loading the output power of the fuel cell when it is appropriate.

[0085] Moreover, given that the power response rate of fuel cells is relatively slow and cannot provide instantaneous power response like batteries, this embodiment can utilize the gradient loading process described above to adjust the output power of the fuel cell in a timely manner, thereby improving the slow power response speed of fuel cells and enhancing their power response capability.

[0086] Based on the above description of the fuel cell output power loading, and as shown in Figure 1 and in conjunction with Figure 2, as a preferred embodiment, the control method of this embodiment further includes the following steps.

[0087] Step s32: When the required fuel cell power of the vehicle is less than the output power of the fuel cell, reduce the output power of the fuel cell.

[0088] Step s42: Control the fuel cell to output power according to the reduced fuel cell output power.

[0089] At this point, this step involves reducing the fuel cell output power when it exceeds demand, thereby reducing fuel cell energy consumption through load reduction.

[0090] Similar to the gradient description of fuel cell output power mentioned above, the reduction of fuel cell output power in step s32 of this embodiment also specifically includes the following steps.

[0091] Step s321: Reduce the fuel cell output power by PxkW according to the preset power gradient BkW / s;

[0092] Step s322: Determine whether the fuel cell output power after reducing PxkW is not greater than the current fuel cell power demand of the vehicle obtained by real-time calculation;

[0093] Step s323: When the fuel cell output power after reducing PxkW is greater than the current vehicle's required fuel-electric power and the fuel cell output power calibrated according to the current battery SOC range, repeat the process of reducing the fuel cell output power by PxkW at least once according to the preset power gradient BkW / s until the fuel cell output power after power reduction is not greater than the current vehicle's required fuel-electric power obtained in real time and not greater than the fuel cell output power calibrated according to the current battery SOC range.

[0094] Specifically, the aforementioned preset power gradient BkW / s can, for example, be 5kW / s, and the aforementioned reduction in fuel cell output power PxkW can, for example, still be 10kW / cycle. Furthermore, the "current vehicle fuel cell power demand obtained through real-time calculation" mentioned in step s312 can also be found in the above description.

[0095] Furthermore, by comparing the reduced fuel cell output power with the current required fuel cell power of the vehicle, it is possible to determine whether the reduction in fuel cell output power is appropriate, and to stop the reduction in fuel cell output power once it is appropriate. Simultaneously, through the above-described gradient reduction process, this embodiment can also utilize the gradient adjustment of fuel cell output power to complete the reduction in a timely manner, thereby improving the slow power response speed of the fuel cell and enhancing its power response capability.

[0096] In this embodiment, as a preferred implementation, the control method further includes controlling the fuel cell to continuously output a first preset time threshold according to the fuel cell output power after the fuel cell output power is loaded or unloaded.

[0097] At this point, once the fuel cell output power has been adjusted (loaded or unloaded), maintaining the fuel cell output power continuously for a first preset time threshold allows sufficient time for the fuel cell to meet gas response and water redistribution requirements, thus improving the fuel cell's voltage response performance. Simultaneously, it avoids voltage fluctuations caused by air starvation during loading and mitigates the accelerated catalyst degradation within the fuel cell stack caused by potential scanning due to frequent load adjustments during operation.

[0098] Once the required interval is met, the fuel cell output power can be adjusted again to respond to the power load changes based on the vehicle's power demand. Specifically, in practice, the first preset time threshold could be, for example, 10 minutes; however, this first preset time threshold can also be set according to the performance of different fuel cells.

[0099] As a preferred embodiment, the control method of this embodiment further includes determining whether the vehicle's required fuel-electric power value is greater than the first preset power threshold within a continuous second preset time threshold during a first preset time threshold period when the fuel cell continuously outputs its power according to the fuel cell output power after loading or unloading. Moreover, if the vehicle's required fuel-electric power value is greater than the first preset power threshold within the continuous second preset time threshold period, the fuel cell output power is loaded after the first preset time threshold period of continuous output.

[0100] At this time, the second preset time threshold and the first preset power threshold can be set according to the type of fuel cell and the overall vehicle control design, etc., and the second preset time threshold should be less than the first preset time threshold, and the first preset power threshold should be greater than the actual output power of the current fuel cell.

[0101] Furthermore, when it is necessary to load the fuel cell output power, the specific loading method can still refer to the aforementioned loading steps. It should also be noted that if, within a continuous first preset time threshold, the duration for which the vehicle's required fuel cell power value is greater than the first preset power threshold is not greater than the second preset time threshold, then after the continuous first preset power threshold, the fuel cell output power will not be recorded, and the current power output will continue.

[0102] In addition to the above-mentioned method of loading fuel cell output power after continuously outputting the first preset time threshold when the vehicle's required fuel cell power value is greater than the first preset power threshold for a continuous second preset time threshold, as a preferred embodiment, the control method of this embodiment also includes determining whether the battery SOC reduction rate is greater than the first preset threshold within the first preset time threshold during which the fuel cell output power is continuously output according to the loaded or unloaded fuel cell output power, and if the battery SOC reduction rate is greater than the first preset threshold, loading fuel cell output power after continuously outputting the first preset time threshold.

[0103] Similarly, the aforementioned first preset threshold can also be set according to the type of fuel cell and the vehicle control design requirements. When it is necessary to load the fuel cell output power, the specific loading method can still refer to the aforementioned loading steps, or other preset fuel cell power loading methods can also be used. Moreover, by loading the fuel cell output power, the impact of the rapid decline in battery SOC on the vehicle's power demand can be offset, so as to meet the vehicle's power requirements when the battery SOC decreases.

[0104] As a preferred embodiment, the control method of this example further includes determining whether the fuel cell output power is greater than the current allowable charging power of the battery within a first preset time threshold during which the fuel cell continuously outputs its power after loading or unloading. Furthermore, when the fuel cell output power exceeds the current allowable charging power of the battery, the overall vehicle power is limited.

[0105] At this point, if the fuel cell's output power exceeds the battery's current allowable charging power, it can easily damage the battery. Therefore, by limiting the overall vehicle power and actively controlling the vehicle's power performance requirements, the fuel cell's output power can be reduced to avoid exceeding the battery's current allowable charging power. Of course, the specific limit on the overall vehicle power, i.e., the vehicle's power performance requirements, can be set based on the fuel cell system, battery system, and vehicle control design requirements.

[0106] As a preferred embodiment, the control method of this embodiment further includes determining whether the battery SOC increase rate is greater than a second preset threshold within a first preset time threshold during which the fuel cell continuously outputs power after loading or unloading. Furthermore, when the battery SOC increase rate is greater than the second preset threshold, the fuel cell output power is reduced.

[0107] At this point, the aforementioned second preset threshold can also be set according to the type of fuel cell and the vehicle control design requirements. When it is necessary to reduce the output power of the fuel cell, the specific reduction method can still refer to the aforementioned loading steps, or other preset fuel cell power loading methods can also be used. Moreover, by reducing the output power of the fuel cell, it is possible to avoid the battery's SOC from increasing too quickly and causing adverse effects on the battery, thereby protecting the battery.

[0108] Furthermore, as a preferred embodiment, the control method of this embodiment further includes acquiring the battery SOC, vehicle speed, throttle opening degree, and vehicle power demand, and controlling the fuel cell not to start when the battery SOC is not less than a preset SOC threshold, the vehicle speed is not greater than a preset vehicle speed threshold, the throttle opening degree is not greater than a preset opening threshold, and the vehicle power demand is not greater than a second preset power threshold.

[0109] At this time, the aforementioned preset SOC threshold can be, for example, 50%, the aforementioned preset vehicle speed threshold can be, for example, 20 km / h, the aforementioned preset opening threshold can be, for example, 30%, and the aforementioned second preset power threshold can be set according to the type of fuel cell and battery, as well as the overall vehicle control design requirements.

[0110] When the fuel cell is not started, the vehicle is powered by the battery and operates in pure electric mode. Moreover, this embodiment controls the fuel cell to not start when the battery SOC, vehicle speed, throttle opening, and vehicle power demand all meet preset requirements. This reduces unnecessary fuel cell start-stop cycles, thereby reducing the number of start-stop cycles during vehicle operation and extending the fuel cell's lifespan.

[0111] The fuel cell vehicle energy control method of this embodiment can calculate the required fuel cell power value of the vehicle based on the vehicle's required power, the peak output power of the battery, and the output power of the fuel cell calibrated according to the current battery SOC range. When the required fuel cell power of the vehicle is greater than the output power of the fuel cell, a gradient loading of the fuel cell output power is performed to meet the vehicle's power requirements by adjusting the output power of the fuel cell.

[0112] Therefore, the fuel cell vehicle energy control method of this embodiment can reduce the variable load demand borne by the battery, and at the same time, it can improve the slow power response speed of the fuel cell by using the gradient adjustment of the fuel cell output power, thereby improving the power response capability of the fuel cell. It can be combined with the battery capacity to improve the overall vehicle power performance and the overall quality of the fuel cell vehicle, thus having great practicality.

[0113] Example 2

[0114] This embodiment relates to an energy control device for a fuel cell vehicle. As shown in Figure 3, the control device includes an acquisition module 20, a storage module 30, a calculation module 40, and a control module 10.

[0115] The acquisition module 20 is used to acquire the vehicle's required power, the battery's peak output power, and the current battery SOC range. The storage module 30 is used to store the fuel cell output power calibrated under different battery SOC ranges. The calculation module 40 is used to calculate the vehicle's required fuel cell power value based on the acquired vehicle required power and battery peak output power.

[0116] The aforementioned control module 10 is used to load the fuel cell output power when the vehicle's required fuel cell power is greater than the fuel cell output power, and control the fuel cell to output according to the loaded fuel cell output power; or, when the vehicle's required fuel cell power is less than the fuel cell output power, to unload the fuel cell output power, and control the fuel cell to output according to the unloaded fuel cell output power.

[0117] Furthermore, still referring to Figure 3, the control device in this embodiment also includes a timing module 50, and after the fuel cell output power is loaded or unloaded, the control module 10 is also used to control the fuel cell to continuously output a first preset time threshold according to the fuel cell output power after loading or unloading.

[0118] Specifically, in the control device of this embodiment, all the above-mentioned modules can be conventional module products used in the existing power battery management field. As a preferred embodiment, the above-mentioned modules can also be integrated into the battery management system of the hydrogen fuel cell. Moreover, in this embodiment, the control steps executed by the control module 10 based on the relevant signals from the acquisition module 20, storage module 30, calculation module 40, and timing module 50 are specifically described in the relevant description in Embodiment 1, and will not be repeated here.

[0119] The fuel cell vehicle energy control device in this embodiment can calculate the required fuel cell power of the vehicle based on the vehicle's required power, the peak output power of the battery, and the output power of the fuel cell calibrated according to the current battery SOC range. When the required fuel cell power of the vehicle is greater than the output power of the fuel cell, the device performs gradient loading of the fuel cell output power to meet the vehicle's power requirements by adjusting the fuel cell output power.

[0120] Therefore, the fuel cell vehicle energy control device of this embodiment can reduce the variable load requirements borne by the battery, and at the same time, it can improve the slow power response speed of the fuel cell by using the gradient adjustment of the fuel cell output power, thereby improving the power response capability of the fuel cell. It can be combined with the battery capacity to improve the overall vehicle power performance and the overall quality of the fuel cell vehicle, thus having great practicality.

[0121] Example 3

[0122] This embodiment relates to a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, can implement the fuel cell vehicle energy control method in Embodiment 1.

[0123] The computer-readable storage medium of this embodiment is generally exemplified by a memory. Furthermore, this computer-readable storage medium includes permanent and non-permanent, removable and non-removable media, and information storage can be achieved by any method or technology.

[0124] The aforementioned information may be computer-readable instructions, data structures, program modules, or other data. Examples of computer-readable storage media 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, CD-ROM, digital versatile optical disc (DVD), or other optical storage, magnetic tape, magnetic magnetic disk storage, or other magnetic storage devices, or any other non-transfer medium that can be used to store information that can be accessed by a computing device.

[0125] In addition, this embodiment also relates to a fuel cell vehicle, which is equipped with the fuel cell vehicle energy control device of Embodiment 2.

[0126] The fuel cell vehicle of this embodiment, by setting the fuel cell vehicle energy control device in Embodiment 2, can reduce the variable load demand borne by the battery, and at the same time, it can improve the slow power response speed of the fuel cell by using the gradient adjustment of the fuel cell output power, thereby improving the power response capability of the fuel cell. It can be combined with the battery capacity to improve the overall vehicle power performance and improve the overall quality of the fuel cell vehicle, thus having good practicality.

[0127] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for energy control of a fuel cell vehicle, characterized in that, The control method includes: acquiring the vehicle's required power, the battery's peak output power, and the fuel cell output power calibrated according to the current battery SOC range; calculating the vehicle's required fuel cell power value based on the acquired vehicle's required power and the battery's peak output power; when the vehicle's required fuel cell power is greater than the fuel cell output power, loading the fuel cell output power and controlling the fuel cell to output according to the loaded fuel cell output power; when the vehicle's required fuel cell power is less than the fuel cell output power, unloading the fuel cell output power and controlling the fuel cell to output according to the unloaded fuel cell output power; after loading or unloading the fuel cell output power, controlling the fuel cell to continuously output according to the loaded or unloaded fuel cell output power for a first preset time threshold; wherein, loading the fuel cell output power includes: increasing the fuel cell output power by Px kW according to a preset power gradient A kW / s; determining whether the fuel cell output power after increasing Px kW is not less than the current vehicle's required fuel cell power calculated in real time; when the fuel cell output power after increasing Px kW is less than the current vehicle's required fuel cell power, repeating the loading according to the preset power gradient A... The fuel cell output power is increased by Px kW at least once until the increased fuel cell output power is not less than the current vehicle power demand calculated in real time. The control method further includes: within a first preset time threshold during which the fuel cell continuously outputs its power according to the loaded or unloaded state, determining whether the vehicle power demand value is greater than a first preset power threshold within a second preset time threshold; if the vehicle power demand value is greater than the first preset power threshold within the second preset time threshold, loading the fuel cell output power after continuously outputting the first preset time threshold; and / or, within a first preset time threshold during which the fuel cell continuously outputs its power according to the loaded or unloaded state, determining whether the battery SOC reduction rate is greater than a first preset threshold; if the battery SOC reduction rate is greater than the first preset threshold, loading the fuel cell output power after continuously outputting the first preset time threshold.

2. The energy control method for fuel cell vehicles according to claim 1, characterized in that: The reduction of fuel cell output power includes: reducing the fuel cell output power by Px kW according to a preset power gradient B kW / s; determining whether the fuel cell output power after the reduction of Px kW is not greater than the current vehicle power demand obtained in real time; if the fuel cell output power after the reduction of Px kW is greater than the current vehicle power demand and greater than the fuel cell output power calibrated according to the current battery SOC range, repeating the reduction of fuel cell output power by Px kW according to the preset power gradient B kW / s at least once, until the fuel cell output power after the power reduction is not greater than the current vehicle power demand obtained in real time and not greater than the fuel cell output power calibrated according to the current battery SOC range.

3. The energy control method for fuel cell vehicles according to claim 2, characterized in that, The control method further includes: within a first preset time threshold during which the fuel cell continuously outputs its power according to the fuel cell output power after loading or unloading, determining whether the fuel cell output power is greater than the current allowable charging power of the battery; when the fuel cell output power is greater than the current allowable charging power of the battery, limiting the vehicle power; and / or, within the first preset time threshold during which the fuel cell continuously outputs its power according to the fuel cell output power after loading or unloading, determining whether the battery SOC increase rate is greater than a second preset threshold; when the battery SOC increase rate is greater than the second preset threshold, performing a load reduction of the fuel cell output power.

4. The energy control method for a fuel cell vehicle according to any one of claims 1 to 3, characterized in that, The control method further includes: acquiring the battery SOC, vehicle speed, throttle opening degree, and vehicle power demand; and controlling the fuel cell not to start when the battery SOC is not less than a preset SOC threshold, the vehicle speed is not greater than a preset vehicle speed threshold, the throttle opening degree is not greater than a preset opening threshold, and the vehicle power demand degree is not greater than a second preset power threshold.

5. An energy control device for a fuel cell vehicle, characterized in that: The control device is used to implement the fuel cell vehicle energy control method according to claim 1, and the control device includes an acquisition module (20), a storage module (30), a calculation module (40), a control module (10), and a timing module (50); the acquisition module (20) is used to acquire the vehicle's required power, the battery's peak output power, and the current battery SOC range; the storage module (30) is used to store the fuel cell output power calibrated under different battery SOC ranges; the calculation module (40) is used to calculate the vehicle's required fuel cell power value based on the acquired vehicle's required power and the battery's peak output power; the control module (10)... (10) is used to load the output power of the fuel cell when the demand for fuel cell power of the whole vehicle is greater than the output power of the fuel cell, and control the fuel cell to output according to the fuel cell output power after loading, or to unload the output power of the fuel cell when the demand for fuel cell power of the whole vehicle is less than the output power of the fuel cell, and control the fuel cell to output according to the fuel cell output power after unloading; after the fuel cell output power is loaded or unloaded, the control module (10) is also used to control the fuel cell to continuously output a first preset time threshold according to the fuel cell output power after loading or unloading.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, it implements the fuel cell vehicle energy control method according to any one of claims 1 to 4.

7. A fuel cell vehicle, characterized in that: The fuel cell vehicle is equipped with the fuel cell vehicle energy control device as described in claim 5.

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