Control method for fuel cell system, fuel cell system, and storage medium
By optimizing the start-up sequence and output power range based on the performance status and power demand of individual fuel cell cells, the problems of high risk and short lifespan of fuel cell systems are solved, thereby achieving improved safety and extended lifespan of fuel cell systems.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGDONG QINGNENG NEW ENERGY TECH CO LTD
- Filing Date
- 2022-12-20
- Publication Date
- 2026-06-23
AI Technical Summary
Existing fuel cell systems have problems such as high risk and short service life during power supply. Conventional methods result in excessively long cumulative operating time of fuel cell cells or some cells being too dry or too wet.
The startup sequence is determined based on the required power and the performance status of the fuel cell cells. Cells with abnormal performance status are activated and restored by controlling the output power range, thereby optimizing the number of fuel cell cells to be started and the running time.
This reduces the number of fuel cell units that need to be started and their operating time, extends the lifespan of the units, avoids risks during the power supply process, and improves the safety and reliability of the system.
Smart Images
Figure CN116247249B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of fuel cell system technology, and is characterized by a control method for a fuel cell system, a fuel cell system, and a medium. Background Technology
[0002] A fuel cell system consists of multiple fuel cell cells. When powering a device through a fuel cell system, the conventional method is to control all fuel cell cells in the system to start up, and then evenly distribute the output power of each fuel cell cell according to the power demand of the device. This method will result in an excessively long cumulative operating time of the fuel cell cells, shortening the lifespan of each fuel cell cell. Another method is to randomly control the start-up of some fuel cell cells. However, this method may cause some fuel cell cells to be too dry or too wet, which may lead to risks in the fuel cell system during power supply. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to overcome the defects of high risk and short service life of fuel cell systems in the prior art, and to provide a control method, fuel cell system and medium for a fuel cell system.
[0004] The present invention solves the above-mentioned technical problems through the following technical solution:
[0005] According to a first aspect of the present invention, a control method for a fuel cell system is provided, the fuel cell system comprising at least two fuel cell cells, the control method comprising:
[0006] Obtain the required power;
[0007] The start-up sequence of the fuel cell cells is determined based on the required power and the performance status of each fuel cell cell in its previous operation.
[0008] The fuel cell units are started sequentially according to the start-up order, and the output power of the fuel cell units is controlled according to the performance status until the sum of the output power of all started fuel cell units reaches the required power.
[0009] Preferably, the step of determining the start-up sequence of the fuel cell cells based on the required power and the performance status of the fuel cell cells during their previous operation includes:
[0010] If the required power is less than the preset power, the starting sequence of the fuel cell cells is determined as follows: first start the fuel cell cells with abnormal performance, and then start the fuel cell cells with normal performance.
[0011] Among them, fuel cell cells with abnormal performance status and fuel cell cells with normal performance status are classified according to the performance status of the fuel cell cells in the last operation.
[0012] Preferably, the performance status includes battery humidity, and the control method of the fuel cell system further includes:
[0013] Fuel cell cells with a humidity level below the lower limit threshold are classified as fuel cell cells with abnormal performance, specifically those that are excessively dry.
[0014] Fuel cell cells with a humidity level greater than the upper limit threshold are classified as fuel cell cells with abnormal performance, specifically as overly humid fuel cell cells.
[0015] Fuel cell units whose battery humidity is not less than the lower humidity threshold and not greater than the upper humidity threshold are classified as fuel cell units with normal performance.
[0016] Preferably, the step of controlling the output power of the fuel cell unit based on the performance state specifically includes:
[0017] Control the overly dry fuel cell cells to output at the lower limit threshold of the first power range;
[0018] Control the excessively wet fuel cell cell to output at the upper threshold of the second power range;
[0019] The fuel cell cells in normal operating condition are controlled to output the corresponding reference output power.
[0020] Wherein, the lower limit threshold of the second power range is not less than the upper limit threshold of the first power range, and the reference output power is calculated based on the required power, the current output power of the fuel cell cell with abnormal performance, and the maximum output power of the fuel cell cell with normal performance.
[0021] Preferably, the control method for the fuel cell system further includes:
[0022] Increase the output power of the over-dry fuel cell cell until the output power of the over-dry fuel cell cell reaches the upper limit threshold of the first power range, and then decrease the output power of the over-dry fuel cell cell until the output power of the over-dry fuel cell cell reaches the lower limit threshold of the first power range.
[0023] Reduce the output power of the overly wet fuel cell cell until the output power of the overly wet fuel cell cell reaches the lower threshold of the second power range, and then increase the output power of the overly wet fuel cell cell until the output power of the overly wet fuel cell cell reaches the upper threshold of the second power range.
[0024] Adjust the output power of the fuel cell cells in normal performance condition so that the sum of the output power of all activated fuel cell cells equals the required power.
[0025] Repeat the above steps until the performance of the abnormal fuel cell cell returns to the preset performance requirements.
[0026] Preferably, the control method for the fuel cell system further includes:
[0027] When the performance of a fuel cell cell with abnormal performance returns to the preset performance requirements, the fuel cell cell that has returned to the preset performance requirements is classified as a fuel cell cell with normal performance.
[0028] Preferably, the control method for the fuel cell system further includes:
[0029] If the required power is not less than the preset power, the fuel cell cells are started sequentially from shortest to longest cumulative operating time until the sum of the maximum output power of all started fuel cell cells reaches the required power.
[0030] Preferably, the step of sequentially starting the fuel cell cells according to their cumulative operating time from shortest to longest specifically includes:
[0031] If the cumulative operating time of the fuel cell cells is the same, the fuel cell cells are started sequentially according to the historical number of switching on and off of the fuel cell cells, from least to most.
[0032] If the number of historical switching cycles of the fuel cell cells is the same, then the fuel cell cells are started sequentially from low to high according to their historical failure rates.
[0033] According to a second aspect of the present invention, a fuel cell system is provided, including a memory, a processor, and a computer program stored in the memory and for running on the processor, wherein the processor executes the computer program to implement a control method for the fuel cell system of the present invention.
[0034] According to a third aspect of the present invention, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the control method of the fuel cell system of the present invention.
[0035] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.
[0036] The positive and progressive effects of this invention are as follows:
[0037] Based on the required power and the performance status of the fuel cell unit during its previous operation, the invention starts the fuel cell units. While ensuring the total activated power meets the required power, it can reactivate and restore fuel cell units with abnormal performance, and achieves the required power with the fewest possible units, thus reducing the number of fuel cell units that need to be started. This invention, on the one hand, can promptly restore the performance of fuel cell units with abnormal performance, avoiding risks during fuel cell system power supply; on the other hand, it meets the required power with the fewest possible units, reducing the number of fuel cell units that need to be started, thereby reducing the operating time of the fuel cell units and extending their service life. Attached Figure Description
[0038] Figure 1 This is a schematic flowchart of the control method for the fuel cell system according to Embodiment 1 of the present invention.
[0039] Figure 2 This is a flowchart illustrating the control method of the fuel cell system according to Embodiment 2 of the present invention.
[0040] Figure 3 This is a flowchart illustrating the control method of the fuel cell system according to Embodiment 3 of the present invention.
[0041] Figure 4 This is a schematic diagram of the fuel cell system of Embodiment 4 of the present invention. Detailed Implementation
[0042] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.
[0043] Example 1
[0044] This embodiment provides a control method for a fuel cell system, which includes at least two fuel cell units. As an optional implementation, the fuel cell system is equipped with a master controller, which controls the multiple fuel cell units as a whole.
[0045] See Figure 1 The control method for this fuel cell system includes the following steps:
[0046] S1. Obtain the required power.
[0047] In this embodiment, the power demand is initiated based on the load demand. As an optional implementation, the user can set the power demand according to the load demand, and then the main controller receives the power demand sent by the user. As another optional implementation, the main controller can also detect the connected load in real time and calculate the power demand based on the load demand.
[0048] S2. Determine the start-up sequence of fuel cell cells based on the required power and the performance status of each fuel cell cell in its previous operation.
[0049] In this embodiment, when the required power is less than the preset power, the startup sequence of the fuel cell units is determined as follows: first, start the fuel cell units with abnormal performance conditions, and then start the fuel cell units with normal performance conditions. The distinction between fuel cell units with abnormal performance conditions and those with normal performance conditions is based on the performance condition of the fuel cell unit during its previous operation.
[0050] As an optional implementation, the fuel cell system presets certain performance state index ranges. When the performance state of a single fuel cell exceeds or falls below these index ranges, it indicates that the performance state of the single fuel cell has become abnormal. For example, performance state includes battery humidity; both excessive dryness and excessive humidity will affect performance state. Of course, the performance state in this embodiment is not limited to battery humidity.
[0051] As an optional implementation method, fuel cell cells with battery humidity below the lower humidity threshold are classified as fuel cell cells with abnormal performance and are excessively dry; fuel cell cells with battery humidity above the upper humidity threshold are classified as fuel cell cells with abnormally poor performance and are excessively wet; and fuel cell cells with battery humidity not less than the lower humidity threshold and not greater than the upper humidity threshold are classified as fuel cell cells with normal performance.
[0052] In this embodiment, the performance status of a fuel cell unit may be due to unfavorable operating conditions from the previous run. For example, the fuel cell system may have been operating at high power continuously, resulting in excessively high operating temperatures and causing the fuel cell unit to become too dry. Since different fuel cell cells accumulate varying amounts of moisture, some fuel cell units may become excessively dry. Therefore, this embodiment, upon receiving the required power, obtains the performance status of the fuel cell unit from its previous run to classify the fuel cell units into those with abnormal performance and those with normal performance.
[0053] As an optional implementation, the performance status of the fuel cell unit before each shutdown can be obtained and classified according to the performance status. Then, the fuel cell unit can be marked, and when the fuel cell unit is started next time, it can be started directly according to the mark.
[0054] S3. Start the fuel cell cells in sequence according to the startup order, and control the output power of the fuel cell cells according to their performance status until the sum of the output power of all started fuel cell cells reaches the required power.
[0055] As an optional implementation, fuel cell cells with different performance states correspond to different output powers. For example, an overly dry fuel cell cell can operate under low-power conditions, i.e., outputting lower power, to facilitate the accumulation of moisture inside the fuel cell cell, which is beneficial for activation. Conversely, an overly wet fuel cell cell can operate under high-power conditions, i.e., outputting higher power, to raise the internal temperature, thereby promoting moisture evaporation and activation. In practical applications, an output power below 50% of the rated power is typically considered low power.
[0056] As an optional implementation, when sequentially starting the fuel cell cells, excessively dry fuel cell cells are controlled to output power at the lower limit of a first power range; excessively wet fuel cell cells are controlled to output power at the upper limit of a second power range. The lower limit of the second power range is not less than the upper limit of the first power range.
[0057] The reference output power is calculated based on the required power, the current output power of a fuel cell cell with abnormal performance, and the maximum output power of a fuel cell cell with normal performance.
[0058] Specifically, the first power range characterizes the output power range corresponding to an excessively dry fuel cell cell, and the second power range characterizes the output power range corresponding to an excessively wet fuel cell cell. Of course, the output power of a fuel cell cell is not limited to considering only dryness and wetness; it also includes other factors affecting performance status and the effect of activation and recovery.
[0059] As an optional approach, it was found through prior experimental testing that excessively dry fuel cell cells exhibit better activation and recovery effects when operating within a power range of 30% to 50% of rated power, while excessively wet fuel cell cells operate within a power range of 50% to 90% of rated power. Therefore, a first power range of 30% to 50% of rated power and a second power range of 50% to 90% of rated power can be set. Of course, this embodiment is not limited to the above power ranges and can be adjusted according to actual conditions.
[0060] As an optional implementation, after controlling the output power of the fuel cell cells with abnormal performance, if there are still fuel cell cells with normal performance, then the normal fuel cell cells are further controlled to output at a corresponding reference output power. The reference output power is calculated based on the required power, the current output power of the abnormal fuel cell cells, and the maximum output power of the normal fuel cell cells. In this embodiment, the maximum output power is used to characterize the rated power of the fuel cell cell.
[0061] For example, suppose a fuel cell system has 10 fuel cell cells, each with a rated power of 100W and a received power demand of 240W. One fuel cell cell is overly wet, one is overly dry, and the remaining 8 fuel cell cells are in normal working condition. During startup, four fuel cell cells are turned on sequentially. At the same time, the output power of the overly dry fuel cell is adjusted to 30W, the output power of the overly wet fuel cell is adjusted to 90W, and the output power of the two normally working fuel cell cells is (240-30-90)*100 / (100+100)=60W respectively.
[0062] In this embodiment, the rated power of the fuel cell cells may also be different. For example, assuming that the rated power of the two fuel cell cells in normal performance are 60W and 100W respectively, the output power of these two fuel cell cells in normal performance can be controlled to be (240-30-90)*100 / (100+60)=75W and (240-30-90)*60 / (100+60)=45W respectively, thereby ensuring that the started fuel cell cells operate evenly within a favorable power range. This is because fuel cell cells that operate at rated power for a long time have a high degradation rate, which affects their service life. On the other hand, if the output power of the fuel cell cells is too low, too many fuel cell cells will be turned on, putting unnecessary fuel cell cells under load and accelerating the aging of the fuel cell cells. Therefore, this embodiment intelligently allocates the output power of the fuel cell cells.
[0063] In practical applications, after receiving the required power, the main controller comprehensively considers the required power, the performance status of the fuel cell cells, and the rated power, and pre-calculates which fuel cell cells should be turned on and the output power of each fuel cell cell. In this way, it starts and intelligently controls the output power of the fuel cell cells, rather than starting the fuel cell cells one by one.
[0064] For example, if the output power of a fuel cell unit is 30W, 90W, 75W, and 45W respectively, and the fuel cell units with output power of 30W and 90W are in abnormal performance, and the required power becomes 200W, then the main controller will calculate the optimal combination to control the output power of the overly dry fuel cell unit to 30W, the output power of the overly wet fuel cell unit to 90W, and the output power of a normally performing fuel cell unit to 80W. This will shut down the fuel cell unit with an output power of 45W and simultaneously adjust the fuel cell unit with an output power of 75W to operate at 80W, instead of controlling the output power of the two fuel cell units to 30W and 50W respectively.
[0065] As an optional implementation, the main controller also records the operating time of each fuel cell unit. When there are multiple fuel cell units that can be shut down, for example, when the output power of the fuel cell units is 30W, 90W, 60W and 60W respectively, the fuel cell units with an output power of 30W and 90W are fuel cell units with abnormal performance. Assuming that the required power becomes 200W, the cumulative operating time of the two fuel cell units with an output power of 60W will be obtained, and the fuel cell unit with the longer cumulative operating time will be shut down first.
[0066] Similarly, when the sum of the output power of the activated fuel cell cells cannot meet the required power, the fuel cell cells can continue to be activated, and the output power of each fuel cell cell can be intelligently controlled in the manner described above.
[0067] This embodiment has the following beneficial effects:
[0068] This embodiment starts the fuel cell units based on the required power and their performance status during the previous operation. While ensuring the total activated power meets the required power, it can reactivate and restore fuel cell units with abnormal performance. Furthermore, it meets the required power with the minimum number of units, reducing the number of fuel cell units that need to be started. This embodiment, on the one hand, can promptly restore the performance of fuel cell units with abnormal performance, avoiding risks during power supply; on the other hand, it meets the required power with the minimum number of units, reducing the number of fuel cell units needed to be started, thereby reducing the operating time of the fuel cell units and extending their service life.
[0069] Example 2
[0070] This embodiment provides a control method for a fuel cell system, which is a further optimization of Embodiment 1. Figure 2 When the abnormal performance of a fuel cell cell during startup includes both an overly dry and an overly wet fuel cell cell, step S3 specifically includes simultaneously executing steps S4 and S5, and then executing step S6. Specifically:
[0071] S4. Increase the output power of the over-dry fuel cell cell until the output power of the over-dry fuel cell cell reaches the upper limit threshold of the first power range, and then decrease the output power of the over-dry fuel cell cell until the output power of the over-dry fuel cell cell reaches the lower limit threshold of the first power range.
[0072] S5. Reduce the output power of the overly wet fuel cell cell until the output power of the overly wet fuel cell cell reaches the lower threshold of the second power range, and then increase the output power of the overly wet fuel cell cell until the output power of the overly wet fuel cell cell reaches the upper threshold of the second power range.
[0073] S6. Adjust the output power of the fuel cell cells in normal performance condition so that the sum of the output power of all activated fuel cell cells equals the required power.
[0074] It should be noted that when the fuel cell cells with abnormal performance at startup include only overly dry fuel cell cells, step S3 specifically includes executing step S4 and then step S6; when the fuel cell cells with abnormal performance at startup include only overly wet fuel cell cells, step S3 specifically includes executing step S5 and then step S6.
[0075] In this embodiment, steps S4 to S6 are repeated until the performance of the fuel cell cell with abnormal performance is restored to the preset performance requirements, and then other subsequent controls are performed.
[0076] As an optional implementation, when the performance of a fuel cell cell with abnormal performance returns to a preset performance requirement, the fuel cell cell that has returned to the preset performance requirement is classified as a fuel cell cell with normal performance. The preset performance requirement includes a range of performance indicators. The main controller will continuously monitor the performance of the activated fuel cell cells. When the performance of a fuel cell cell is within the specified range, it indicates that the fuel cell cell's performance has returned to the preset performance requirement. For example, if the performance status includes battery humidity, the controller will continuously monitor whether the battery humidity has returned to within the lower and upper humidity thresholds.
[0077] In this implementation, when the performance of a fuel cell cell with abnormal performance returns to the preset performance requirements, it is determined whether the normally functioning fuel cell cell can be shut down. For example, during operation with fuel cell cells outputting 30W, 90W, and 80W respectively, the fuel cell cells with outputs of 30W and 90W are abnormal. Assuming the rated power of each fuel cell cell is 100W, when these two abnormal fuel cell cells return to the preset performance requirements, one of the normally functioning fuel cell cells can be shut down, leaving only two fuel cell cells running and controlling their output power to 100W respectively. Alternatively, assuming the 90W fuel cell cell returns to the preset performance requirements, while the 30W fuel cell cell does not, shutting down one fuel cell cell would leave the remaining running fuel cell cells with a total output of only 130W to 150W, insufficient to meet the 200W power requirement. Therefore, the fuel cell cell cannot be shut down; instead, the output power of the two fuel cell cells other than the 30W cell is controlled to 85W respectively.
[0078] As an optional implementation method, when the fuel cell system meets the conditions for shutting down a fuel cell cell in normal performance, the fuel cell cell will be shut down after a certain period of time is determined after the conditions are met, so as to avoid frequent start-up and shutdown of the fuel cell cell.
[0079] This embodiment has the following beneficial effects:
[0080] By controlling the abnormal performance of fuel cell cells and adjusting them several times to the lower limit threshold of the corresponding power range and then to the upper limit threshold of the corresponding power range, it is more conducive to the activation and recovery of fuel cell cells, thereby improving the activation efficiency.
[0081] Example 3
[0082] This embodiment provides a control method for a fuel cell system. When the power demand is high, the control method does not consider activating and restoring fuel cell cells with abnormal performance, but prioritizes meeting the principle of ensuring that the total power output reaches the demand.
[0083] See Figure 3 After obtaining the required power, step S11 is executed first, specifically:
[0084] S11. Determine whether the required power is less than the preset power. If yes, proceed to step S2 and then step S3; otherwise, proceed to step S12.
[0085] When reactivating and restoring fuel cell cells with abnormal performance, a power margin is needed to allow these cells to undergo activation operations, such as adjusting their power levels up or down within their respective power ranges. As an optional implementation, a preset power can be calculated based on the total rated power of the fuel cell system and the performance status of the individual fuel cell cells. For example, assuming the fuel cell system has 10 fuel cell cells, each with a rated power of 100W, one cell is overly wet, one is overly dry, and the remaining eight cells are in normal performance. The overly dry cell has an adjustable power level of 30% to 50% of its rated power, and the overly wet cell has an adjustable power level of 50% to 90% of its rated power. To ensure that the abnormally performing fuel cell cell has a power margin for activation, the sum of the output power of all fuel cell cells when turned on is calculated. The maximum value can be 30 + 50 + 100 * 8 = 880W, which is the preset power. When the required power is less than 880W, step S2 is executed; when the required power is greater than 880W, step S12 is executed.
[0086] As an alternative implementation, a preset power can also be customized. For example, when the cumulative operating time of different fuel cell cells differs greatly, a smaller preset power can be set to balance the cumulative operating time of the fuel cell cells. The process of starting and stopping the fuel cell cells in rotation can be performed several times by controlling the number of fuel cell cells started. When the cumulative operating time of the fuel cell cells is as uniform as possible, a larger preset power can be set to prioritize the activation and recovery of fuel cell cells with abnormal performance.
[0087] In this embodiment, steps S2 and S3 are described identically to the corresponding steps in Embodiment 1. Alternatively, if step S3 further includes executing steps S4, S5, and S6, then steps S4, S5, and S6 are described identically to the corresponding steps in Embodiment 2.
[0088] S12. Start the fuel cell cells sequentially from shortest to longest cumulative operating time, until the sum of the maximum output power of all started fuel cell cells reaches the required power.
[0089] As an optional implementation, if the cumulative operating time of the fuel cell cells is the same, the fuel cell cells are started sequentially from the lowest to the highest number of historical on / off cycles. If the historical on / off cycles of the fuel cell cells are the same, the fuel cell cells are started sequentially from the lowest to the highest historical failure rate.
[0090] In this embodiment, when shutting down a fuel cell unit, the units are shut down in descending order of their cumulative operating time. Alternatively, if the cumulative operating time of the fuel cell units is the same, they are shut down in descending order of their historical on / off count. If the historical on / off count is the same, they are shut down in descending order of their historical failure rate.
[0091] As an optional implementation, after starting the fuel cell unit, to ensure that the started fuel cell units operate evenly within a favorable power range, the output power of the started fuel cell units is intelligently controlled according to the control of fuel cell units in normal performance status. The specific process is the same as the corresponding description in Example 1. For example, assuming the power demand is 240W, and three fuel cell units are started, with each fuel cell unit having a rated power of 100W, the output power of the three fuel cell units can be controlled to be 80W each, instead of one fuel cell unit having an output power of 40W and the other two fuel cell units having an output power of 100W.
[0092] This embodiment has the following beneficial effects:
[0093] By balancing the operating time of individual fuel cell cells and ensuring that each fuel cell cell operates within a favorable power range as much as possible, the lifespan of the fuel cell system is effectively increased.
[0094] Example 4
[0095] This embodiment provides a fuel cell system. Figure 4 This is a schematic diagram of a fuel cell system provided for an embodiment. The fuel cell system includes a memory, a processor, and a computer program stored in the memory and executed on the processor. When the processor executes the program, it implements the control method of the fuel cell system in Embodiment 1, Embodiment 2, or Embodiment 3 described above. Figure 4 The fuel cell system 20 shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of the present invention.
[0096] like Figure 4 As shown, the fuel cell system 20 can be represented as a general-purpose computing device, such as a server device. The components of the fuel cell system 20 may include, but are not limited to: at least one processor 21, at least one memory 22, and a bus 23 connecting different system components (including the memory 22 and the processor 21).
[0097] Bus 23 includes a data bus, an address bus, and a control bus.
[0098] The memory 22 may include volatile memory, such as random access memory (RAM) 221 and / or cache memory 222, and may further include read-only memory (ROM) 223.
[0099] The memory 22 may also include a program / utility 225 having a set (at least one) of program modules 224, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.
[0100] The processor 21 executes various functional applications and data processing by running computer programs stored in the memory 22, such as the control method of the fuel cell system in Embodiment 1, Embodiment 2 or Embodiment 3 above.
[0101] The fuel cell system 20 can also communicate with one or more external devices 24 (e.g., keyboard, pointing device, etc.). This communication can be performed via input / output (I / O) interface 25. Furthermore, the model generation device 20 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 26. Figure 4 As shown, network adapter 26 communicates with other modules of the model-generated device 20 via bus 23. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with the model-generated device 20, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems.
[0102] It should be noted that although several units / modules or sub-units / modules of the fuel cell system are mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of the invention, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided and embodied by multiple units / modules.
[0103] Example 6
[0104] This embodiment provides a computer-readable storage medium storing a computer program thereon. When the program is executed by a processor, it implements the steps in the control method of the fuel cell system in Embodiment 1, Embodiment 2, or Embodiment 3 described above.
[0105] The readable storage medium may be more specifically adopted, including but not limited to: portable disk, hard disk, random access memory, read-only memory, erasable programmable read-only memory, optical storage device, magnetic storage device, or any suitable combination thereof.
[0106] In a possible implementation, the present invention can also be implemented as a program product, which includes program code. When the program product is run on a terminal device, the program code is used to cause the terminal device to perform the steps in the control method for the fuel cell system described in Embodiment 1, Embodiment 2 or Embodiment 3 above.
[0107] The program code for executing the present invention can be written in any combination of one or more programming languages. The program code can be executed entirely on the user device, partially on the user device, as a standalone software package, partially on the user device and partially on a remote device, or entirely on a remote device.
[0108] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.
Claims
1. A control method for a fuel cell system, characterized in that, The fuel cell system includes at least two fuel cell units, and the control method of the fuel cell system includes: Obtain the required power; The start-up sequence of the fuel cell cells is determined based on the required power and the performance status of each fuel cell cell in its previous operation. The fuel cell units are started sequentially according to the start-up order, and the output power of the fuel cell units is controlled according to the performance status until the sum of the output power of all started fuel cell units reaches the required power. The step of determining the start-up sequence of the fuel cell cells based on the required power and the performance status of the fuel cell cells during their previous operation includes: If the required power is less than the preset power, the starting sequence of the fuel cell cells is determined as follows: first start the fuel cell cells with abnormal performance, and then start the fuel cell cells with normal performance. Among them, fuel cell cells with abnormal performance and fuel cell cells with normal performance are classified according to the battery humidity of the fuel cell cell during its last operation.
2. The control method for a fuel cell system according to claim 1, characterized in that, The control method for the fuel cell system further includes: Fuel cell cells with a humidity level below the lower limit threshold are classified as fuel cell cells with abnormal performance, specifically those that are excessively dry. Fuel cell cells with a humidity level greater than the upper limit threshold are classified as fuel cell cells with abnormal performance, specifically as overly humid fuel cell cells. Fuel cell units whose battery humidity is not less than the lower humidity threshold and not greater than the upper humidity threshold are classified as fuel cell units with normal performance.
3. The control method for a fuel cell system according to claim 2, characterized in that, The step of controlling the output power of a fuel cell unit based on the performance status specifically includes: Control the overly dry fuel cell cells to output at the lower limit threshold of the first power range; Control the excessively wet fuel cell cell to output at the upper threshold of the second power range; The fuel cell cells in normal operating condition are controlled to output the corresponding reference output power. Wherein, the lower limit threshold of the second power range is not less than the upper limit threshold of the first power range, and the reference output power is calculated based on the required power, the current output power of the fuel cell cell with abnormal performance, and the maximum output power of the fuel cell cell with normal performance.
4. The control method for a fuel cell system according to claim 3, characterized in that, The control method for the fuel cell system further includes: Increase the output power of the over-dry fuel cell cell until the output power of the over-dry fuel cell cell reaches the upper limit threshold of the first power range, and then decrease the output power of the over-dry fuel cell cell until the output power of the over-dry fuel cell cell reaches the lower limit threshold of the first power range. Reduce the output power of the overly wet fuel cell cell until the output power of the overly wet fuel cell cell reaches the lower threshold of the second power range, and then increase the output power of the overly wet fuel cell cell until the output power of the overly wet fuel cell cell reaches the upper threshold of the second power range. Adjust the output power of the fuel cell cells in normal performance condition so that the sum of the output power of all activated fuel cell cells equals the required power. Repeat the above steps until the performance of the abnormal fuel cell cell returns to the preset performance requirements.
5. The control method for a fuel cell system according to claim 4, characterized in that, The control method for the fuel cell system further includes: When the performance of a fuel cell cell with abnormal performance returns to the preset performance requirements, the fuel cell cell that has returned to the preset performance requirements is classified as a fuel cell cell with normal performance.
6. The control method for a fuel cell system according to claim 1, characterized in that, The control method for the fuel cell system further includes: If the required power is not less than the preset power, the fuel cell cells are started sequentially from shortest to longest cumulative operating time until the sum of the maximum output power of all started fuel cell cells reaches the required power.
7. The control method for a fuel cell system according to claim 6, characterized in that, The step of starting up the fuel cell units sequentially according to their cumulative operating time from shortest to longest specifically includes: If the cumulative operating time of the fuel cell cells is the same, the fuel cell cells are started sequentially according to the historical number of switching on and off of the fuel cell cells, from least to most. If the number of historical switching cycles of the fuel cell cells is the same, then the fuel cell cells are started sequentially from low to high according to their historical failure rates.
8. A fuel cell system, comprising a memory, a processor, and a computer program stored in the memory and for running on the processor, characterized in that, When the processor executes the computer program, it implements the control method for the fuel cell system as described in any one of claims 1-7.
9. 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 control method for the fuel cell system as described in any one of claims 1-7.