Single-chip voltage control method and device of fuel cell system, storage medium and electronic equipment

Abstract

The invention discloses a monolithic voltage control method and device for a fuel cell system, a storage medium and electronic equipment. The method comprises the following steps: continuously acquiring the lowest monolithic voltage of the cell system in an operation state; whether the lowest single-chip voltage in the current state is smaller than a first early warning threshold value or not is judged, and if yes, the battery system executes a corresponding first intervention action; whether the lowest single-chip voltage in the current state is smaller than a second danger threshold value or not is judged, and if yes, the battery system executes a responded second intervention action; and judging whether the lowest single-chip voltage in the current state is greater than a third recovery threshold value or not again after the preset time, if so, performing a recovery action, and if not, continuing to execute a second intervention action. On the premise of ensuring the safety of a galvanic pile and preventing permanent damage of a single chip, the power output capacity of the system is maintained to the maximum extent, the independence of control logic in each operation cycle is ensured through a shutdown reset mechanism, and finally the comprehensive improvement of the reliability, the service life and the economical efficiency of the fuel cell engine is realized.

Description

Technical Field

[0001] This invention belongs to the technical field of fuel cells, specifically relating to a method, device, storage medium, and electronic equipment for single-cell voltage control of a fuel cell system. Background Technology

[0002] As a highly efficient and clean energy conversion device, fuel cells have broad application prospects in new energy vehicles, distributed power generation, and other fields. The fuel cell stack, the core component of a fuel cell engine, consists of dozens or even hundreds of individual cells connected in series, and its performance and lifespan directly determine the reliability of the entire engine. During operation, due to uneven gas distribution, improper hydrothermal management, catalyst degradation, and other factors, individual cells may experience a significant drop in voltage compared to the average voltage. If not addressed promptly, this can lead to further degradation of the affected cell, and even cause a decline in the performance of the entire stack, severely impacting the reliability and lifespan of the fuel cell engine.

[0003] Existing control strategies for single-cell low voltage are mostly simple protections triggered by a single threshold, such as patents CN201859204U, CN1746695A, and CN105044440A. These strategies fail to effectively protect the fuel cell stack while maintaining dynamic responsiveness. If these issues are not addressed, single-cell low voltage will continue to deteriorate, leading to serious consequences such as localized reverse polarity in the stack, accelerated catalyst corrosion, and irreversible damage to the membrane electrode assembly (MEA). Ultimately, this significantly shortens the lifespan of the fuel cell engine, increases user maintenance costs, and hinders the large-scale application of fuel cell technology. Summary of the Invention

[0004] The purpose of this invention is to provide a method, device, storage medium, and electronic device for single-cell voltage control of a fuel cell system, in order to solve the problems in the prior art.

[0005] Therefore, the present invention provides a method for single-chip voltage control of a fuel cell system, comprising: S1 continuously collects the lowest single-cell voltage of the battery system during operation; S2, determine whether the lowest single-cell voltage in the current state is less than the first warning threshold. If it is less than the threshold, the battery system performs the corresponding first intervention action. S3, based on the fact that the battery system has performed the first intervention action, determine whether the lowest single cell voltage in the current state is less than the second danger threshold. If it is less than the threshold, the battery system performs the corresponding second intervention action. S4. Based on the fact that the battery system has already performed the second intervention action, after a preset time, it is determined again whether the lowest single cell voltage in the current state is greater than the third recovery threshold. If it is greater, a recovery action is performed; if it is less, the second intervention action is continued.

[0006] In some embodiments, the first intervention action is to limit the current loading rate to a first rate to avoid a drop in the single-chip voltage caused by a rapid increase in current. The second intervention action is to reduce the current to a preset safety value; The recovery action involves applying current to the battery system according to a preset loading strategy.

[0007] In some embodiments, if a shutdown command is received at any time during the monitoring, judgment, or control process, a shutdown operation is performed and all intervention actions are reset. Steps S1-S4 will be executed again upon the next power-on.

[0008] In some embodiments, in step S2, if the lowest single-chip voltage is greater than the first warning threshold, control is performed according to a preset current loading rate. In step S3, if the lowest single-chip voltage is greater than the second danger threshold, the current operation is maintained in the current state. In step S4, if the lowest single-chip voltage is less than the third recovery threshold, the second intervention action continues.

[0009] In some embodiments, the first warning threshold is greater than the third recovery threshold, and the third recovery threshold is greater than the second danger threshold.

[0010] In some embodiments, the first warning threshold is 450mV-550mV, the second danger threshold is 220mV-280mV, and the third recovery threshold is 280mV-350mV.

[0011] In some embodiments, the first rate is 10A / s-30A / s, the preset safety value is 30A-80A, and the preset time is 0.5min-2min.

[0012] On the other hand, a single-chip voltage control device for a fuel cell system is also provided for executing a control method, including: The data acquisition module is used to continuously collect the lowest single-cell voltage of the battery system during operation; The first-level early warning module is used to determine whether the lowest single-cell voltage in the current state is less than the first early warning threshold. If it is less, the battery system performs the corresponding first intervention action. The secondary early warning module, based on the battery system having already performed the first intervention action, is used to determine whether the lowest single cell voltage in the current state is less than the second danger threshold. If it is less, the battery system performs the corresponding second intervention action. The recovery module, based on the fact that the battery system has already performed the second intervention action, is used to determine again after a preset time whether the lowest single cell voltage in the current state is greater than the third recovery threshold. If it is greater, the recovery action is performed; if it is less, the second intervention action is continued.

[0013] On the other hand, a computer-readable storage medium is also provided, which stores a computer program for running a single-cell voltage control method for a fuel cell system, wherein the computer program causes a computer to execute the single-cell voltage control method for the fuel cell system. An electronic device, characterized in that it comprises: On the other hand, an electronic device is also provided, comprising: One or more processors; memory; and One or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs including methods for performing single-chip voltage control of a fuel cell system.

[0014] Beneficial effects: This invention uses a three-tiered voltage threshold system (warning, danger, and recovery) to assess the lowest single-cell voltage in a stepped manner and dynamically adjust the current loading rate and operating current accordingly. Upon triggering current reduction protection, a verification method based on preset delay and recovery thresholds is introduced to determine whether loading can be resumed. This ensures stack safety and prevents permanent damage to individual cells while maximizing system power output. Furthermore, a shutdown reset mechanism ensures the independence of control logic for each operating cycle, ultimately achieving a comprehensive improvement in the reliability, lifespan, and economy of the fuel cell engine. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 The flowchart illustrates the single-chip voltage control method for a fuel cell system provided by this invention.

[0017] Figure 2 This is a schematic diagram of a single-chip voltage control device for a fuel cell system provided by the present invention. Detailed Implementation

[0018] The invention will be more readily understood by referring to the following detailed description of preferred embodiments and included examples. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In case of conflict, the definitions in this specification shall prevail.

[0019] In some embodiments of the present invention, such as Figure 1 As shown, a single-cell voltage control method for a fuel cell system includes: S1 continuously collects the lowest single-cell voltage of the battery system during operation. The battery system refers to the fuel cell stack, which consists of hundreds of individual cells. The lowest single-cell voltage can be collected using, for example, a high-precision voltage acquisition chip at a frequency of at least 10Hz. This allows for real-time monitoring of the voltage of each individual cell in the stack, and the lowest voltage among the collected individual cell voltages is determined as the lowest single-cell voltage.

[0020] S2, determine whether the lowest single-cell voltage in the current state is less than the first warning threshold. If it is, the battery system executes a corresponding first intervention action. The first warning threshold is a preset voltage threshold value used to identify whether the battery stack has begun to deviate from its optimal operating range. For example, if the first warning threshold is set to 500mV, and the lowest single-cell voltage is less than 500mV, the battery system controls the execution of the first intervention action, which limits the current loading rate to a first rate to avoid a drop in single-cell voltage caused by a rapid increase in current. For example, the normal current loading rate can reach 100A / s when power is required, but when executing the first intervention action, it is limited to the first rate of 20A / s. This slows down the electrochemical reaction rate and the consumption rate of reactants, allowing time for hydrothermal reequilibrium and gas diffusion replenishment, preventing the problem of mild unevenness turning into a severe voltage drop due to a rapid increase in current.

[0021] If the lowest single-cell voltage is greater than the first warning threshold, the system will be controlled according to the preset current loading rate, meaning the battery system will operate at the normal loading rate.

[0022] S3, based on the battery system having already performed the first intervention action, determines whether the lowest single-cell voltage in the current state is less than the second danger threshold. If it is less, the battery system performs a corresponding second intervention action. Specifically, the second danger threshold is a safety critical threshold used to determine whether a single battery cell faces a serious risk, such as reverse polarity. The second intervention action is a safety-ensuring response action; in this embodiment, it is to actively reduce the operating current.

[0023] The second intervention action is to reduce the current to a preset safe value. For example, the second danger threshold is set to 250mV. While current-limiting loading has already been implemented, the lowest single-cell voltage is continuously monitored. If the lowest single-cell voltage drops below 250mV, it indicates that the single-cell may have serious problems such as local blockage or microchannel flooding, and is approaching the electrochemical danger window of reverse polarity (anode potential higher than cathode potential). In this case, the stack's output operating current is immediately reduced to a preset safe value, such as 50A. This significantly reduces the current density through the problematic single-cell, directly reducing its electrochemical stress and fundamentally preventing reverse polarity. This prevents irreversible physical damage such as catalyst corrosion and proton membrane perforation, keeping the fault localized.

[0024] If the lowest single-cell voltage exceeds the second danger threshold, the current operating current will be maintained. For example, if the lowest single-cell voltage exceeds 250mV, the fuel cell system will maintain the current operating current.

[0025] S4, based on the second intervention action already performed by the battery system, after a preset time, it is determined again whether the lowest single-cell voltage in the current state is greater than the third recovery threshold. If it is greater, a recovery action is performed; if it is less, the second intervention action continues. The preset time is a period that provides a buffer period for the battery stack to recover its performance, while the third recovery threshold is the criterion for determining whether the performance of a single cell has been recoverably improved. The recovery action attempts to gradually restore the system's output capability.

[0026] The recovery action involves applying current to the battery system according to a preset loading strategy. For example, after the operating current drops to 50A and runs for one minute, the lowest cell voltage is monitored again. If it is greater than a third recovery threshold, such as 300mV, the performance of the low-voltage cell is considered to have partially recovered, and the system can attempt to restore power output using a conservative loading strategy. For example, the current can be gradually increased at a rate of 10A / s. If the lowest cell voltage is less than the third recovery threshold, a second intervention action is performed. For example, if the lowest cell voltage is ≤300mV, it indicates that the recovery is not ideal, and the system continues to maintain a low current of 50A to avoid secondary damage, and the judgment is repeated in subsequent cycles.

[0027] Understandably, after operating at reduced current for a period of time, the local environment of the problematic chip may improve due to the low-load operation. At this point, by combining the third recovery threshold for judgment, if the voltage recovers significantly, it indicates that the damage is temporary and reversible, and the system can cautiously restore output to maximize power availability; if the voltage does not recover, it indicates that there may be irreversible damage or a fundamental fault, and the system should maintain low-current safe operation and report fault codes to avoid blindly loading under damaged conditions, which could lead to catastrophic consequences.

[0028] In one embodiment, if a shutdown command is received at any time during the monitoring, judgment, or control process, a shutdown operation is performed and all intervention actions are reset. Steps S1-S4 will be executed again upon the next power-on.

[0029] This step is independent of the aforementioned hierarchical control method. As a parallel and high-priority method, regardless of which stage in steps S1 to S4, and regardless of whether the system is currently in normal, warning, or protection mode, as soon as a shutdown command is received from the user or the upper-level system, it immediately executes the sequential safe shutdown of the engine, including reducing the load and shutting down auxiliary systems; and At the software logic level, all status flags, temporary variables, and timers related to the current execution cycle within the control strategy will be cleared or reset. Specifically, this includes: Clear the first intervention action activation flag to disable the current loading rate limiting function.

[0030] Clear the activation flag for the second intervention action and exit the low-current operation mode.

[0031] Reset the preset timer used for resuming timing to zero.

[0032] Reset the logic pointer of the control flow to the initial entry point.

[0033] After the reset is complete, the control system enters standby mode. When a power-on command is received again, the control strategy will completely ignore the historical state of the previous operation and start a completely new, independent hierarchical control cycle from step S1. Even if the fuel cell stack was in a severe low-voltage protection state (such as 50A current-limited operation) before the last shutdown, the voltage will be re-acquired and judged this time, without inheriting any previous limitations.

[0034] Understandably, at the beginning of each cycle, the control system initializes all its internal decision variables, ensuring the control algorithm operates in a defined and clean initial state. Its judgments are based entirely on the actual physical state of the current fuel cell stack, avoiding misjudgments, false protections, or false recoverys caused by residual software states from the previous run. This significantly improves the accuracy and reliability of the control.

[0035] In one embodiment provided by the present invention: Power-on detection specifically involves real-time monitoring of the lowest single-cell voltage of the fuel cell stack during operation after the fuel cell engine is powered on and running. The first level of voltage intervention involves the following steps: If the lowest single-cell voltage is <XmV, it indicates a slight risk of single-cell undervoltage in the fuel cell stack. In this case, the current loading rate is limited to qA / s to prevent a rapid increase in current from exacerbating the voltage drop in a single cell. If the lowest single-cell voltage is ≥XmV, the current loading rate is controlled according to the normal current loading rate to ensure power responsiveness. The normal current loading rate is pre-calibrated based on the fuel cell stack characteristics and power requirements.

[0036] The second level of voltage intervention involves continuing to monitor the lowest single-cell voltage of the fuel cell stack under control logic that limits the current loading rate to qA / s. If the lowest single-cell voltage is < YmV, it indicates an increased risk of low single-cell voltage, and the operating current is reduced to rA. If the lowest single-cell voltage is ≥ bmV, normal current operation is maintained, achieving a balance between protection and power.

[0037] The recovery loading control specifically involves allowing the fuel cell stack a certain recovery time when the operating current drops to rA. After running for n minutes, the lowest single-cell voltage is monitored again. If the lowest single-cell voltage is > ZmV, it indicates that the single-cell voltage has recovered to a level where loading can be attempted, and current loading is attempted according to the preset loading strategy. If the lowest single-cell voltage is ≤ ZmV, the rA operating state is maintained to avoid secondary damage caused by loading.

[0038] The shutdown reset specifically refers to the process where, during normal current loading rate control, normal current operation, or maintaining the current operation, if the user triggers a shutdown command, the engine will shut down and the strategy will be reset. When the engine is restarted after shutdown, the power-on detection steps will be restarted to ensure the independence of the control logic for each startup.

[0039] Among them, the first warning threshold X, the second danger threshold Y, and the third recovery threshold Z are single low thresholds of the engine, which are used to identify the health status of a single battery, and X > Z > Y.

[0040] The reasonable range for X is 450mV-550mV, for Y it is 220mV-280mV, and for Z it is 280mV-350mV. X serves as the first-level warning threshold. When the voltage of a single cell falls below this value, it indicates that the single cell has deviated from its normal operating range, and the current loading rate needs to be reduced to prevent further voltage drop.

[0041] Y is the second-level danger threshold. When the voltage is below this value, the single cell is close to the risk of reverse polarization, which will cause permanent damage to the single cell. This value is a safety critical value determined through a large number of failure experiments combined with the electrochemical performance of proton exchange membrane fuel cells.

[0042] Z is used as the recovery judgment threshold. When the voltage of a single battery rises above this value after running at low current for n minutes, it indicates that its performance can be recovered. This value is the experimental result that balances the performance recovery of the single battery and the system response rate.

[0043] The current loading rate is limited to the first rate q, which has a value range of 10A / s-30A / s.

[0044] The operating current r is the safe operating current that takes into account both the protection of individual batteries and the power requirements of the system. The reasonable value range is 30A-80A.

[0045] The running time, or preset time n, is any time value based on the performance and recovery characteristics of a single battery. Shortening the time improves the system response efficiency, while extending the time ensures the recovery of single battery performance. A reasonable value range is approximately 0.5 min to 2 min.

[0046] like Figure 2 As shown, on the other hand, the present invention also provides a single-chip voltage control device for a fuel cell system, used to execute the above-described control method, specifically including: The data acquisition module is used to continuously collect the lowest single-cell voltage of the battery system during operation; The first-level early warning module is used to determine whether the lowest single-cell voltage in the current state is less than the first early warning threshold. If it is less, the battery system performs the corresponding first intervention action. The secondary early warning module, based on the battery system having already performed the first intervention action, is used to determine whether the lowest single cell voltage in the current state is less than the second danger threshold. If it is less, the battery system performs the corresponding second intervention action. The recovery module, based on the fact that the battery system has already performed the second intervention action, is used to determine again after a preset time whether the lowest single cell voltage in the current state is greater than the third recovery threshold. If it is greater, the recovery action is performed; if it is less, the second intervention action is continued.

[0047] On the other hand, the present invention also provides a computer-readable storage medium storing a method for operating a single-chip voltage control method for a fuel cell system, wherein a computer program causes a computer to perform the following steps: S1 continuously collects the lowest single-cell voltage of the battery system during operation; S2, determine whether the lowest single-cell voltage in the current state is less than the first warning threshold. If it is less than the threshold, the battery system performs the corresponding first intervention action. S3, based on the fact that the battery system has performed the first intervention action, determine whether the lowest single cell voltage in the current state is less than the second danger threshold. If it is less than the threshold, the battery system performs the corresponding second intervention action. S4. Based on the fact that the battery system has already performed the second intervention action, after a preset time, it is determined again whether the lowest single cell voltage in the current state is greater than the third recovery threshold. If it is greater, a recovery action is performed; if it is less, the second intervention action is continued.

[0048] The computer-readable storage medium can be a computer storage medium or a communication medium. A communication medium includes any medium that facilitates the transfer of a computer program from one location to another. A computer storage medium can be any available medium accessible to a general-purpose or special-purpose computer. For example, a computer-readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the computer-readable storage medium. Of course, the computer-readable storage medium can also be a component of the processor. The processor and the computer-readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the ASIC can reside in a user equipment. Of course, the processor and the computer-readable storage medium can also exist as discrete components in a communication device.

[0049] Specifically, the computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random-Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The storage medium can be any available medium accessible to general-purpose or special-purpose computers.

[0050] On the other hand, an electronic device is also provided, comprising: One or more processors; memory; and One or more programs, wherein the programs are stored in memory and configured to be executed by one or more processors, the programs including steps for performing the following: S1 continuously collects the lowest single-cell voltage of the battery system during operation; S2, determine whether the lowest single-cell voltage in the current state is less than the first warning threshold. If it is less than the threshold, the battery system performs the corresponding first intervention action. S3, based on the fact that the battery system has performed the first intervention action, determine whether the lowest single cell voltage in the current state is less than the second danger threshold. If it is less than the threshold, the battery system performs the corresponding second intervention action. S4. Based on the fact that the battery system has already performed the second intervention action, after a preset time, it is determined again whether the lowest single cell voltage in the current state is greater than the third recovery threshold. If it is greater, a recovery action is performed; if it is less, the second intervention action is continued.

[0051] Memory is used to store computer programs. This memory may include high-speed random access memory (RAM) and may also include non-volatile memory (Non-volatile memory). Volatile Memory (NVM), such as at least one disk storage device, can also be a USB flash drive, external hard drive, read-only memory, disk or optical disc, etc.

[0052] Specifically, the aforementioned memory is internal memory, which can be used to store executable program code that a computer can point to, including instructions. Internal memory may include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function, etc. The data storage area may store data created during the use of the electronic device, etc. Furthermore, internal memory 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, universal flash storage (UFS), etc. The processor executes various functional applications and data processing of the electronic device by running instructions stored in the internal memory and / or instructions stored in memory located within the processor.

[0053] A processor is used to execute a computer program stored in memory to implement the vehicle system operation protection method in the above embodiments. The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0054] Optionally, the memory can be either standalone or integrated with the processor. The processor may include one or more processing units, such as: an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural network processor. Network processing units (NPUs), etc. Different processing units can be independent devices or integrated into one or more processors. The controller can generate operation control signals based on the instruction opcode and timing signals to control instruction fetching and execution.

[0055] When memory is a device independent of the processor, electronic devices may also include a bus. This bus is used to connect the memory and the processor. This bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 single-chip voltage control in a fuel cell system, characterized in that, include: S1 continuously collects the lowest single-cell voltage of the battery system during operation; S2, determine whether the lowest single-cell voltage in the current state is less than the first warning threshold. If it is less than the threshold, the battery system performs the corresponding first intervention action. S3, based on the fact that the battery system has performed the first intervention action, determine whether the lowest single cell voltage in the current state is less than the second danger threshold. If it is less than the threshold, the battery system performs the corresponding second intervention action. S4. Based on the fact that the battery system has already performed the second intervention action, after a preset time, it is determined again whether the lowest single cell voltage in the current state is greater than the third recovery threshold. If it is greater, a recovery action is performed; if it is less, the second intervention action is continued.

2. The control method according to claim 1, characterized in that, The first intervention action is to limit the current loading rate to a first rate in order to avoid a drop in single-chip voltage caused by a rapid increase in current. The second intervention action is to reduce the current to a preset safety value; The recovery action involves applying current to the battery system according to a preset loading strategy.

3. The control method according to claim 1, characterized in that, If a shutdown command is received at any point during the monitoring, judgment, or control process, the shutdown operation is executed and all intervention actions are reset. Steps S1-S4 will be executed again upon the next power-on.

4. The control method according to claim 1, characterized in that, In step S2, if the lowest single-chip voltage is greater than the first warning threshold, then control is performed according to the preset current loading rate. In step S3, if the lowest single-chip voltage is greater than the second danger threshold, the current operation is maintained in the current state. In step S4, if the lowest single-chip voltage is less than the third recovery threshold, the second intervention action continues.

5. The control method according to claim 1, characterized in that, The first warning threshold is greater than the third recovery threshold, and the third recovery threshold is greater than the second danger threshold.

6. The control method according to claim 1, characterized in that, The first warning threshold is 450mV-550mV, the second danger threshold is 220mV-280mV, and the third recovery threshold is 280mV-350mV.

7. The control method according to claim 2, characterized in that, The first rate is 10A / s-30A / s, the preset safety value is 30A-80A, and the preset time is 0.5min-2min.

8. A single-chip voltage control device for a fuel cell system, characterized in that, For performing the control method according to any one of claims 1-7, comprising: The data acquisition module is used to continuously collect the lowest single-cell voltage of the battery system during operation; The first-level early warning module is used to determine whether the lowest single-cell voltage in the current state is less than the first early warning threshold. If it is less, the battery system performs the corresponding first intervention action. The secondary early warning module, based on the battery system having already performed the first intervention action, is used to determine whether the lowest single cell voltage in the current state is less than the second danger threshold. If it is less, the battery system performs the corresponding second intervention action. The recovery module, based on the fact that the battery system has already performed the second intervention action, is used to determine again after a preset time whether the lowest single cell voltage in the current state is greater than the third recovery threshold. If it is greater, the recovery action is performed; if it is less, the second intervention action is continued.

9. A computer-readable storage medium, characterized in that, It stores a computer program for running a single-cell voltage control method for a fuel cell system, wherein the computer program causes a computer to execute the single-cell voltage control method for a fuel cell system as described in any one of claims 1-7.

10. An electronic device, characterized in that, include: One or more processors; Memory; as well as One or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs including methods for performing the single-cell voltage control method for a fuel cell system as described in any one of claims 1-7.

Images