A fuel cell and its power control method and storage medium

Abstract

The present invention discloses a fuel cell, a power control method, and a storage medium thereof. The method comprises: obtaining a vehicle's requested power and the actual output power of the fuel cell, wherein the fuel cell is installed in the vehicle; determining a power adjustment coefficient for the fuel cell when the difference between the vehicle's requested power and the actual output power of the fuel cell is greater than or equal to a preset threshold and the fuel cell meets preset conditions; and calculating a set output power for the fuel cell based on the vehicle's requested power, the actual output power of the fuel cell, and the power adjustment coefficient. The solution provided by the present invention enables adaptive power control of the fuel cell to meet the vehicle's requirements, ensuring the fuel cell vehicle's power performance and effectively extending the durability and service life of the fuel cell.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of fuel cell vehicles, and in particular to a fuel cell and a power control method and storage medium thereof. Background Art

[0002] With the decline in fossil fuel consumption and rising environmental awareness, new energy vehicles have experienced rapid development. However, due to issues such as insufficient range and difficulty in charging, the development of pure electric vehicles has encountered technical bottlenecks. Fuel cell vehicles, which combine the advantages of long range with zero pollution and emissions, have gradually become a research hotspot.

[0003] The development of fuel cell vehicles is primarily constrained by the lifespan and cost of fuel cells. The fuel cell lifespan performance curve shows that after a period of use, fuel cell performance declines with increasing usage time, resulting in the fuel cell's actual output power being less than the vehicle's requested power at that current density point (also known as the power density point). This means that the fuel cell's actual output power cannot meet vehicle demand. Typically, this performance degradation is irreversible. In addition to optimizing energy management to slow the degradation process before fuel cell performance degrades, it is also necessary to implement necessary energy management solutions to compensate for the degraded performance after fuel cell performance has already begun to degrade, in order to meet vehicle demand.

[0004] Existing performance compensation solutions often rely on the vehicle's onboard power battery pack. However, using the power battery pack as a supplemental power source results in the fuel cell's control software functionality being split, making it impossible for the vehicle to fully understand the fuel cell's operating status. Adding fuel cell control logic to the vehicle creates redundancy and complicates tracing issues later. Summary of the Invention

[0005] The present invention provides a fuel cell and its power control method and storage medium, which can realize adaptive power control of the fuel cell to meet the needs of the vehicle, ensure the power performance of the fuel cell vehicle, and effectively extend the durability and service life of the fuel cell.

[0006] In a first aspect, an embodiment of the present invention provides a fuel cell power control method, comprising:

[0007] obtaining a vehicle requested power and an actual output power of a fuel cell, wherein the fuel cell is mounted in the vehicle;

[0008] determining a power adjustment coefficient of the fuel cell when a difference between the vehicle's requested power and the actual output power of the fuel cell is greater than or equal to a preset threshold and the fuel cell meets a preset condition;

[0009] The set output power of the fuel cell is calculated based on the vehicle's requested power, the actual output power of the fuel cell, and the power adjustment coefficient of the fuel cell.

[0010] Optionally, after obtaining the vehicle's requested power and the actual output power of the fuel cell, the following steps are also included:

[0011] determining whether a difference between the vehicle's requested power and the actual output power of the fuel cell is greater than or equal to a preset threshold;

[0012] If the difference between the vehicle's requested power and the fuel cell's actual output power is less than a preset threshold, the fuel cell's set output power remains unchanged;

[0013] If the difference between the vehicle's requested power and the fuel cell's actual output power is greater than or equal to a preset threshold, determining whether the fuel cell meets a preset condition;

[0014] If the fuel cell does not meet the preset conditions, the set output power of the fuel cell remains unchanged.

[0015] Optionally, the preset condition is that the health level of the fuel cell is greater than or equal to a preset level;

[0016] Accordingly, before determining whether the fuel cell meets the preset conditions, the following steps are also included:

[0017] Determine the health level of the fuel cell.

[0018] Optionally, the preset condition is that the current output power of the fuel cell is greater than or equal to a preset output power.

[0019] Optionally, determine the fuel cell health level, including:

[0020] Obtaining a volt-ampere curve, an output voltage, and an output current of the fuel cell, wherein the volt-ampere curve includes a reference curve and M attenuation curves, where M is an integer greater than or equal to 2;

[0021] Let X = 1, and determine whether the output voltage is between the first voltage and the second voltage, where X represents the number of the attenuation curve, the first voltage is the voltage corresponding to the output current on the Xth attenuation curve, and the second voltage is the voltage corresponding to the output current on the X+1th attenuation curve;

[0022] If the judgment result is yes, the health level of the fuel cell is determined to be X;

[0023] If the determination result is no, then set X=X+1, and return to the step of determining whether the output voltage is between the first voltage and the second voltage until X=M.

[0024] Optionally, determine the fuel cell health level, including:

[0025] Obtaining a volt-ampere curve, an output voltage, and an output current of the fuel cell, wherein the volt-ampere curve includes a reference curve and M attenuation curves, where M is an integer greater than or equal to 2;

[0026] Obtaining an Nth attenuation curve from the M attenuation curves, wherein a difference between the output voltage and a third voltage is the smallest, the third voltage being a voltage corresponding to the output current on the Nth attenuation curve, 1≤N≤M, and N is an integer;

[0027] The health level of the fuel cell is determined to be N.

[0028] Optionally, the distances between the first attenuation curve to the Mth attenuation curve and the reference curve gradually decrease.

[0029] Optionally, the set output power of the fuel cell

[0030] Among them, PWR Base is the actual output power of the fuel cell, PWR Req Request power for the vehicle, PWR Diff Request power PWR for the vehicle Req And the actual output power PWR of the fuel cell Base The difference, Coeff PID is the power adjustment coefficient of the fuel cell.

[0031] In a second aspect, an embodiment of the present invention further provides a fuel cell, comprising: a processor; the processor is configured to implement the method of any of the above embodiments when executing a computer program.

[0032] In a third aspect, an embodiment of the present invention further provides a computer-readable storage medium storing a computer program, which implements the method of any of the above embodiments when executed by a processor.

[0033] The present invention provides a fuel cell and its power control method and storage medium. When the difference between the vehicle's requested power and the fuel cell's actual output power is greater than or equal to a preset threshold and the fuel cell meets preset conditions, the fuel cell's power adjustment coefficient is determined, and the set output power of the fuel cell is calculated based on the vehicle's requested power, the fuel cell's actual output power, and the fuel cell's power adjustment coefficient. In this way, by changing the set output power of the fuel cell, the fuel cell's actual output power is made consistent with the vehicle's requested power, thereby achieving adaptive power control of the fuel cell and ensuring that the vehicle's performance is not affected. Compared with existing methods, there is no need for a power battery pack as a supplementary power source, which avoids the splitting of the fuel cell's control software function and does not increase the volume of the power battery pack. The power of the fuel cell vehicle is guaranteed, and the durability and service life of the fuel cell can be effectively extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a flow chart of a fuel cell power control method provided by an embodiment of the present invention;

[0035] Figure 2 is a flow chart of another fuel cell power control method provided by an embodiment of the present invention;

[0036] Figure 3 is a flow chart of a method for determining the health level of a fuel cell provided by an embodiment of the present invention;

[0037] Figure 4 is a schematic diagram of a volt-ampere curve of a fuel cell provided by an embodiment of the present invention;

[0038] Figure 5 is a flow chart of another method for determining the health level of a fuel cell provided by an embodiment of the present invention;

[0039] Figure 6 1 is a schematic structural diagram of a power control device for a fuel cell provided by an embodiment of the present invention;

[0040] Figure 7 It is a structural schematic diagram of a fuel cell provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0042] It should be noted that the following various embodiments of the present invention can be performed individually, and the various embodiments can also be performed in combination with each other, and the embodiments of the present invention do not impose specific restrictions on this. The "and / or" mentioned in the embodiments of the present invention refers to any and all combinations of one or more related listed items. In the embodiments of the present invention, "first", "second", etc. are used to describe various components, but these components should not be limited by these terms. These terms are only used to distinguish one component from another. In addition, unless the context clearly indicates otherwise, the singular forms "one", "a", and "the ()" are also intended to include plural forms. The following various embodiments of the present invention can be performed individually, and the various embodiments can also be performed in combination with each other, and the embodiments of the present invention do not impose specific restrictions on this.

[0043] After a period of use, the performance of a fuel cell will decline as the usage time increases, resulting in the actual output power of the fuel cell being less than the vehicle's requested power at that current density point. Therefore, necessary energy management solutions need to be adopted to compensate for the attenuated performance to meet vehicle needs.

[0044] In addition to fuel cells, existing vehicles also carry a small power battery pack. The power battery pack serves as both a starting power source for the fuel cell and a power source for the vehicle. In some harsh operating conditions, when the fuel cell's actual output power cannot meet the vehicle's requirements, the vehicle controller will request power from the power battery pack to meet the requested power. However, this solution uses the power battery pack as a supplemental power source, integrating its control algorithm within the vehicle controller. This splits the fuel cell control software functionality, preventing the vehicle controller from fully understanding the fuel cell's operating status. Adding fuel cell control logic to the vehicle controller introduces redundancy and complicates troubleshooting. Furthermore, using the power battery pack as a supplemental power source requires consideration of its output power and battery capacity. When fuel cell performance degrades, the load on the power battery pack increases, requiring it to have a higher output power and capacity. This inevitably increases the size of the power battery pack, impacting the vehicle's layout and weight.

[0045] To this end, the present invention provides a fuel cell and its power control method and storage medium. When the difference between the vehicle's requested power and the fuel cell's actual output power is greater than or equal to a preset threshold and the fuel cell meets preset conditions, the fuel cell's power adjustment coefficient is determined, and the set output power of the fuel cell is calculated based on the vehicle's requested power, the fuel cell's actual output power, and the fuel cell's power adjustment coefficient. In this way, by changing the set output power of the fuel cell, the fuel cell's actual output power is made consistent with the vehicle's requested power, thereby achieving adaptive power control of the fuel cell and ensuring that the vehicle's performance is not affected. Compared with existing methods, there is no need for a power battery pack as a supplementary power source, which avoids the splitting of the fuel cell's control software functions and does not increase the volume of the power battery pack. This ensures the power of fuel cell vehicles and can effectively extend the durability and service life of fuel cells.

[0046] Figure 1 The flowchart of a power control method for a fuel cell provided by an embodiment of the present invention is shown. The method is applicable to fuel cells (e.g., fuel cell systems installed in smart cars, new energy smart cars, etc.), such as Figure 1 As shown, the method includes the following steps.

[0047] S110 : Obtaining a vehicle's requested power and an actual output power of a fuel cell, wherein the fuel cell is installed in the vehicle.

[0048] It is understandable that, without considering the degradation of fuel cell performance (also known as the ideal situation), the set output power of the fuel cell is consistent with the actual output power of the fuel cell. However, as the performance of the fuel cell decreases, the actual output power of the fuel cell will usually be less than the set output power of the fuel cell. In other words, when the vehicle is operating normally, the vehicle calculates the vehicle request power in real time based on the current operating conditions. The fuel cell uses the vehicle request power as the set output power of the fuel cell, and its actual output power will not be able to meet the vehicle's needs. In this case, it is necessary to adopt the necessary energy management solution to compensate for the degraded performance to meet the vehicle's needs.

[0049] S120 : When the difference between the vehicle requested power and the actual output power of the fuel cell is greater than or equal to a preset threshold and the fuel cell meets a preset condition, determine a power adjustment coefficient of the fuel cell.

[0050] When the difference between the vehicle's requested power and the fuel cell's actual output power is greater than or equal to a preset threshold, it indicates that the fuel cell's performance needs to be compensated. At the same time, the fuel cell must meet preset conditions to ensure fuel cell safety during subsequent performance compensation.

[0051] In one embodiment, the preset condition is that the health level of the fuel cell is greater than or equal to a preset level; or, the preset condition is that the current output power of the fuel cell is greater than or equal to a preset output power. For example, assuming the preset condition is that the health level of the fuel cell is greater than or equal to a preset level, the fuel cell health level is divided into 5 levels, and the preset level is level 2; for another example, assuming the preset condition is that the current output power of the fuel cell is greater than or equal to a preset output power, the preset output power is half of the initial maximum output power of the fuel cell.

[0052] The preset threshold value may be dynamically determined based on the actual operating conditions of the vehicle, or a fixed value may be selected based on the experience of vehicle engineers and stored in the fuel cell. This embodiment of the present invention does not impose any specific limitation on this.

[0053] In step S120 , the power adjustment coefficient of the fuel cell may be obtained by processing a proportional-integral-derivative controller (also known as a PID controller) of the fuel cell.

[0054] S130 , calculating the set output power of the fuel cell according to the vehicle's requested power, the actual output power of the fuel cell, and the power adjustment coefficient of the fuel cell.

[0055] Specifically, the set output power of the fuel cell

[0056] Among them, PWR Base is the actual output power of the fuel cell, PWR Req Request power for the vehicle, PWR Diff Request power PWR for the vehicle Req And the actual output power PWR of the fuel cell Base The difference, Coeff PID is the power adjustment coefficient of the fuel cell.

[0057] In this way, by changing the set output power of the fuel cell, the actual output power of the fuel cell can be made consistent with the vehicle's requested power, thereby achieving adaptive power control of the fuel cell and ensuring that the performance of the vehicle is not affected.

[0058] Exemplarily, the power control method of the fuel cell provided by the embodiment of the present invention is described by taking the preset condition that the health level of the fuel cell is greater than or equal to the preset level as an example. Figure 2 FIG. 1 is a flow chart showing another fuel cell power control method provided by an embodiment of the present invention, as shown in FIG. Figure 2 As shown, the method includes the following steps.

[0059] S210 : Obtaining a vehicle's requested power and an actual output power of a fuel cell, wherein the fuel cell is installed in the vehicle.

[0060] S220: Determine whether the difference between the vehicle's requested power and the actual output power of the fuel cell is greater than or equal to a preset threshold.

[0061] The preset threshold value may be dynamically determined based on the actual operating conditions of the vehicle, or a fixed value may be selected based on the experience of vehicle engineers and stored in the fuel cell. This embodiment of the present invention does not impose any specific limitation on this.

[0062] S230: If the judgment result of step S202 is no, the set output power of the fuel cell is kept unchanged.

[0063] If the result of step S202 is negative, it means that the performance of the current fuel cell has not decreased or has decreased slightly, and the actual output power of the fuel cell can basically meet the vehicle demand. In this case, the set output power of the fuel cell can be kept unchanged.

[0064] S240: If the judgment result of step S202 is yes, determine the health level of the fuel cell.

[0065] If the result of step S202 is yes, it means that the performance of the current fuel cell has deteriorated significantly and the actual output power of the fuel cell can no longer meet the vehicle's needs. In this case, it is necessary to determine whether the fuel cell is suitable for performance compensation.

[0066] Specifically, in step S240, “determining the health level of the fuel cell” may be implemented in any one of the following two possible ways, but is not limited to:

[0067] In one possible implementation, Figure 3 FIG2 shows a flow chart of a method for determining the health level of a fuel cell provided by an embodiment of the present invention. Figure 3 As shown, a possible implementation includes steps 1a-1d.

[0068] Step 1a: Obtain a volt-ampere curve, an output voltage, and an output current of the fuel cell, wherein the volt-ampere curve includes a reference curve and M attenuation curves, where M is an integer greater than or equal to 2.

[0069] The volt-ampere curve of the fuel cell can be read from the electrically erasable programmable read-only memory (EEPROM) of the fuel cell controller (FCU).

[0070] Figure 4 FIG1 shows a schematic diagram of a volt-ampere curve of a fuel cell provided by an embodiment of the present invention. Figure 4 As shown in the figure, the abscissa of the fuel cell's volt-ampere curve is the battery output current, and the ordinate is the battery output voltage. The volt-ampere curve includes a baseline curve and M attenuation curves. The distance between the first attenuation curve to the Mth attenuation curve and the baseline curve gradually decreases. That is, the first attenuation curve is farthest from the baseline curve, and the Mth attenuation curve is closest to the baseline curve.

[0071] The baseline curve represents the relationship between the current and voltage of the fuel cell under ideal conditions; the Mth attenuation curve represents the relationship between the current and voltage of the fuel cell when the health level of the fuel cell is level M; ...; the first attenuation curve represents the relationship between the current and voltage of the fuel cell when the health level of the fuel cell is level 1.

[0072] The output voltage and the output current are respectively the real-time voltage and the real-time current of the fuel cell at the current moment.

[0073] Step 1b: Let X = 1, and determine whether the output voltage is between the first voltage and the second voltage, where X represents the serial number of the attenuation curve, the first voltage is the voltage corresponding to the output current on the Xth attenuation curve, and the second voltage is the voltage corresponding to the output current on the X+1th attenuation curve.

[0074] Step 1c: If the judgment result is yes, determine the health level of the fuel cell to be X.

[0075] Step 1d: If the judgment result is no, set X=X+1, and return to the step of determining whether the output voltage is between the first voltage and the second voltage until X=M.

[0076] When determining the health level of a fuel cell, the output current is used as a comparison benchmark. Two adjacent attenuation curves are found based on the output voltage, satisfying the following relationship: first voltage ≤ output voltage < second voltage. The first voltage is the voltage corresponding to the output current on the Xth attenuation curve, and the second voltage is the voltage corresponding to the output current on the X+1th attenuation curve. This determines the health level of the fuel cell to be X.

[0077] The order of searching for attenuation curves is from low to high, that is, starting with the attenuation curve with the most serious performance degradation. This is helpful for judging the health status of the fuel cell more quickly when its performance is poor, so as to make corresponding adjustments more quickly.

[0078] In another possible implementation, Figure 5 FIG2 shows a flow chart of another method for determining the health level of a fuel cell provided by an embodiment of the present invention. Figure 5 As shown, another possible implementation includes steps 2a-2c.

[0079] Step 2a: Obtain the volt-ampere curve, output voltage, and output current of the fuel cell, wherein the volt-ampere curve includes a reference curve and M attenuation curves, where M is an integer greater than or equal to 2.

[0080] The volt-ampere curve of the fuel cell can be read from the EEPROM of the fuel cell controller (FCU). Figure 4 For the sake of brevity, the description is not repeated here.

[0081] The output voltage and the output current are respectively the real-time voltage and the real-time current of the fuel cell at the current moment.

[0082] Step 2b: Obtain an Nth attenuation curve from the M attenuation curves, wherein the difference between the output voltage and the third voltage is the smallest, the third voltage is the voltage corresponding to the output current on the Nth attenuation curve, 1≤N≤M, and N is an integer.

[0083] Step 2c: Determine the health level of the fuel cell as N.

[0084] When determining the health level of a fuel cell, the output current is used as a comparison benchmark. Based on the output voltage, a decay curve is found that satisfies the following relationship: |third voltage - output voltage|min. The health level of the fuel cell is the index of the decay curve to which the output voltage is closest.

[0085] Specifically, the voltage corresponding to the output current on each attenuation curve can be first obtained; then the difference between the output voltage and the voltage corresponding to the output current on each attenuation curve is calculated; finally, the attenuation curve with the smallest difference is selected, which is the Nth attenuation curve.

[0086] Similarly, the order of searching for attenuation curves is from low to high, that is, starting with the attenuation curve with the most serious performance degradation. This is conducive to faster judgment of the health status of the fuel cell when its performance is poor, so as to make corresponding adjustments more quickly.

[0087] S250: Determine whether the health level of the fuel cell is greater than or equal to a preset level.

[0088] The preset level can be set according to actual needs. For example, if the fuel cell health level is divided into 5 levels, the preset level is level 2.

[0089] S260: If the judgment result of step S205 is no, the set output power of the fuel cell is kept unchanged.

[0090] If the result of step S205 is negative, this indicates that although the fuel cell's performance has significantly degraded and its actual output power can no longer meet the vehicle's requirements, performance compensation is not appropriate. In this case, to ensure fuel cell safety, the set output power of the fuel cell remains unchanged.

[0091] S270: If the judgment result of step S205 is yes, determine the power adjustment coefficient of the fuel cell.

[0092] If the result of step S205 is yes, it means that the current fuel cell performance has deteriorated significantly and the actual output power of the fuel cell can no longer meet the vehicle's needs. At the same time, the fuel cell is suitable for performance compensation. In this case, the fuel cell's PID controller is used to obtain the fuel cell power adjustment coefficient.

[0093] S280 : Calculate the set output power of the fuel cell according to the vehicle's requested power, the actual output power of the fuel cell, and the power adjustment coefficient of the fuel cell.

[0094] Specifically, the set output power of the fuel cell

[0095] Among them, PWR Base is the actual output power of the fuel cell, PWR Req Request power for the vehicle, PWR Diff Request power PWR for the vehicle Req And the actual output power PWR of the fuel cell Base The difference, Coeff PID is the power adjustment coefficient of the fuel cell.

[0096] By changing the fuel cell's set output power, the actual fuel cell output power can be aligned with the vehicle's requested power, achieving adaptive fuel cell power control and ensuring unimpeded vehicle performance. Furthermore, adaptive fuel cell power control is tied to the fuel cell's health, adding reliable lower-limit protection and providing an interface for subsequent control algorithm development, facilitating the expansion of control logic.

[0097] An embodiment of the present invention provides a fuel cell power control method, comprising: obtaining a vehicle's requested power and the actual output power of a fuel cell, wherein the fuel cell is installed in a vehicle; determining a power adjustment coefficient for the fuel cell when the difference between the vehicle's requested power and the actual output power of the fuel cell is greater than or equal to a preset threshold and the fuel cell meets preset conditions; and calculating a set output power for the fuel cell based on the vehicle's requested power, the actual output power of the fuel cell, and the power adjustment coefficient. The method determines the power adjustment coefficient for the fuel cell when the difference between the vehicle's requested power and the actual output power of the fuel cell is greater than or equal to the preset threshold and the fuel cell meets preset conditions, and calculates the set output power for the fuel cell based on the vehicle's requested power, the actual output power of the fuel cell, and the power adjustment coefficient. In this manner, by adjusting the set output power of the fuel cell, the actual output power of the fuel cell is aligned with the vehicle's requested power, thereby achieving adaptive power control of the fuel cell and ensuring that vehicle performance is not affected. Compared to existing methods, this method eliminates the need for a power battery pack as a supplemental power source, avoids splitting the fuel cell's control software functions, and does not increase the size of the power battery pack. This method ensures the power performance of the fuel cell vehicle and effectively extends the durability and service life of the fuel cell.

[0098] Figure 6 FIG1 shows a schematic diagram of the structure of a power control device for a fuel cell provided by an embodiment of the present invention. Figure 6 As shown, the device can be integrated into a fuel cell, and includes: an acquisition module 10 , a processing module 11 and a compensation module 12 .

[0099] an acquisition module 10 for acquiring a vehicle requested power and an actual output power of a fuel cell, wherein the fuel cell is mounted in the vehicle;

[0100] a processing module 11 for determining a power adjustment coefficient of the fuel cell when the difference between the vehicle's requested power and the actual output power of the fuel cell is greater than or equal to a preset threshold and the fuel cell meets a preset condition;

[0101] The compensation module 12 is configured to calculate the set output power of the fuel cell according to the vehicle's requested power, the actual output power of the fuel cell, and the power adjustment coefficient of the fuel cell.

[0102] The power control device of the fuel cell provided in this embodiment is for implementing the power control method of the fuel cell in the above embodiment. The implementation principle and technical effects of the power control device of the fuel cell provided in this embodiment are similar to those in the above embodiment and will not be repeated here.

[0103] Optionally, the processing module 11 is also used to determine whether the difference between the vehicle's requested power and the actual output power of the fuel cell is greater than or equal to a preset threshold; if the difference between the vehicle's requested power and the actual output power of the fuel cell is less than the preset threshold, the set output power of the fuel cell is maintained unchanged; if the difference between the vehicle's requested power and the actual output power of the fuel cell is greater than or equal to the preset threshold, it is determined whether the fuel cell meets the preset conditions; if the fuel cell does not meet the preset conditions, the set output power of the fuel cell is maintained unchanged.

[0104] Optionally, the preset condition is that the health level of the fuel cell is greater than or equal to a preset level; or, the preset condition is that the current output power of the fuel cell is greater than or equal to a preset output power.

[0105] Optionally, if the preset condition is that the health level of the fuel cell is greater than or equal to a preset level, the processing module 11 is further configured to determine the health level of the fuel cell.

[0106] Optionally, the processing module 11 is specifically used to obtain the volt-ampere curve, output voltage and output current of the fuel cell, wherein the volt-ampere curve includes a reference curve and M attenuation curves, and M is an integer greater than or equal to 2; let X=1, and judge whether the output voltage is between the first voltage and the second voltage, wherein X represents the serial number of the attenuation curve, the first voltage is the voltage corresponding to the output current on the Xth attenuation curve, and the second voltage is the voltage corresponding to the output current on the X+1th attenuation curve; if the judgment result is yes, the health level of the fuel cell is determined to be X; if the judgment result is no, let X=X+1, and return to the step of judging whether the output voltage is between the first voltage and the second voltage, until X=M.

[0107] Optionally, the processing module 11 is specifically used to obtain the volt-ampere curve, output voltage and output current of the fuel cell, wherein the volt-ampere curve includes a baseline curve and M attenuation curves, M is an integer greater than or equal to 2; obtain the Nth attenuation curve from the M attenuation curves, wherein the difference between the output voltage and the third voltage is the smallest, the third voltage is the voltage corresponding to the output current on the Nth attenuation curve, 1≤N≤M, and N is an integer; determine that the health level of the fuel cell is N.

[0108] Optionally, the distances between the first attenuation curve to the Mth attenuation curve and the reference curve gradually decrease.

[0109] Optionally, the set output power of the fuel cell

[0110] Among them, PWR Base is the actual output power of the fuel cell, PWR Req Request power for the vehicle, PWR Diff Request power PWR for the vehicle Req And the actual output power PWR of the fuel cell Base The difference, Coeff PID is the power adjustment coefficient of the fuel cell.

[0111] Figure 7 FIG. 1 shows a schematic structural diagram of a fuel cell provided by an embodiment of the present invention. Figure 7 As shown, the fuel cell includes a processor 30, a memory 31 and a communication interface 32; the number of processors 30 in the fuel cell can be one or more. Figure 7 In the figure, a processor 30 is used as an example; the processor 30, memory 31, and communication interface 32 in the fuel cell can be connected by a bus or other means. Figure 7 The term "bus" refers to one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, and a processor or local bus using any of a variety of bus architectures.

[0112] The memory 31, as a computer-readable storage medium, can be configured to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the method in the embodiments of the present invention. The processor 30 executes the software programs, instructions, and modules stored in the memory 31 to execute at least one functional application and data processing of the fuel cell, thereby implementing the above-mentioned method.

[0113] The memory 31 may include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function; the data storage area may store data generated based on the use of the fuel cell, etc. Furthermore, the memory 31 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state memory device. In some instances, the memory 31 may include a memory remotely located relative to the processor 30, and such remote memory may be connected to the fuel cell via a network. Examples of such networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0114] The communication interface 32 can be configured to receive and send data.

[0115] An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the method provided by any embodiment of the present invention is implemented.

[0116] The computer storage medium of the embodiment of the present invention may adopt any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or component, or any combination thereof. Computer-readable storage media include (a non-exhaustive list): an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, device or device.

[0117] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, the data signal carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transfer a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0118] The program code embodied on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, radio frequency (RF), etc., or any suitable combination of the foregoing.

[0119] Computer program code for performing the operations of the present disclosure may be written in one or more programming languages, or a combination of multiple programming languages, including object-oriented programming languages ​​such as Java, Smalltalk, C++, Ruby, Go, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0120] It will be appreciated by those skilled in the art that the term user terminal covers any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser or a vehicle-mounted mobile station.

[0121] In general, various embodiments of the present invention may be implemented in hardware or dedicated circuits, software, logic, or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device, although the invention is not limited thereto.

[0122] Embodiments of the present invention may be implemented by executing computer program instructions by a data processor of a mobile device, for example, in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.

[0123] Any block diagram of a logic flow in the accompanying drawings of the present invention may represent program steps, or may represent interconnected logic circuits, modules and functions, or may represent a combination of program steps and logic circuits, modules and functions. A computer program may be stored on a memory. The memory may be of any type suitable for the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, read-only memory (ROM), random access memory (RAM), optical storage devices and systems (digital versatile discs (DVDs) or CDs), etc. Computer-readable media may include non-transitory storage media. A data processor may be of any type suitable for the local technical environment, such as, but not limited to, a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), and a processor based on a multi-core processor architecture.

[0124] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A fuel cell power control method, characterized in that: include: obtaining a vehicle requested power and an actual output power of a fuel cell, wherein the fuel cell is mounted in the vehicle; Determine the health level of the fuel cell; determining a power adjustment coefficient of the fuel cell when a difference between the vehicle requested power and the actual output power of the fuel cell is greater than or equal to a preset threshold and the fuel cell meets a preset condition, wherein the preset condition is that the health level of the fuel cell is greater than or equal to a preset level; The set output power of the fuel cell is calculated based on the vehicle request power, the actual output power of the fuel cell and the power adjustment coefficient of the fuel cell, wherein the set output power of the fuel cell is , is the actual output power of the fuel cell, requesting power for said vehicle, Request power for the vehicle and the actual output power of the fuel cell The difference, is the power adjustment coefficient of the fuel cell.

2. The fuel cell power control method according to claim 1, further comprising: after obtaining the vehicle requested power and the actual output power of the fuel cell; determining whether a difference between the vehicle requested power and the actual output power of the fuel cell is greater than or equal to a preset threshold; If the difference between the vehicle's requested power and the actual output power of the fuel cell is less than the preset threshold, maintaining the set output power of the fuel cell unchanged; If the difference between the vehicle requested power and the actual output power of the fuel cell is greater than or equal to the preset threshold, determining whether the fuel cell meets a preset condition; If the fuel cell does not meet the preset conditions, the set output power of the fuel cell is kept unchanged.

3. The fuel cell power control method according to claim 1, wherein: Determining the health level of the fuel cell includes: Obtaining a volt-ampere curve, an output voltage, and an output current of the fuel cell, wherein the volt-ampere curve includes a reference curve and M attenuation curves, where M is an integer greater than or equal to 2; Let X=1, determine whether the output voltage is between the first voltage and the second voltage, where X represents the sequence number of the attenuation curve, the first voltage is the voltage corresponding to the output current on the Xth attenuation curve, and the second voltage is the voltage corresponding to the output current on the X+1th attenuation curve; If the judgment result is yes, determining the health level of the fuel cell to be X; If the determination result is no, set X=X+1, and return to the step of determining whether the output voltage is between the first voltage and the second voltage until X=M.

4. The fuel cell power control method according to claim 1, wherein: Determining the health level of the fuel cell includes: Obtaining a volt-ampere curve, an output voltage, and an output current of the fuel cell, wherein the volt-ampere curve includes a reference curve and M attenuation curves, where M is an integer greater than or equal to 2; Obtaining an Nth attenuation curve from the M attenuation curves, wherein a difference between the output voltage and a third voltage is the smallest, the third voltage being a voltage corresponding to the output current on the Nth attenuation curve, 1≤N≤M, and N is an integer; The health level of the fuel cell is determined to be N.

5. The fuel cell power control method according to claim 3 or 4, characterized in that: The distances between the first attenuation curve to the Mth attenuation curve and the reference curve gradually decrease.

6. A fuel cell, characterized in that: include: A processor, wherein the processor is configured to implement the fuel cell power control method according to any one of claims 1 to 5 when executing a computer program.

7. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the power control method for a fuel cell according to any one of claims 1 to 5 is implemented.

Images