Fuel cell system fault processing method, device, equipment and medium

Abstract

The embodiment of the invention provides a fuel cell system fault processing method and device, equipment and a medium, and relates to the technical field of batteries. The method comprises the following steps: in response to received operation data of the fuel cell system, determining that at least one element in the fuel cell system is in an abnormal state; based on the operation data, determining and implementing an abnormal state control strategy corresponding to the fuel cell system, and if the abnormal state control strategy is emergency shutdown, determining a corresponding sudden stop recovery strategy based on the state of the fuel cell system after emergency shutdown; and based on the sudden stop recovery strategy, carrying out recovery processing on the fuel cell system in the sudden stop state. The method provided by the invention effectively solves the problem that the fuel cell system fault coping strategy in the related technology may affect the system performance and the service life.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a fuel cell system fault handling method, device, equipment and medium. Background Art

[0002] The application of fuel cells, particularly hydrogen fuel, in equipment power systems, such as fuel cell engines, has been widely researched. To ensure the safe operation of fuel cell systems, reliable fault handling strategies are required to ensure the safety of the fuel cell system in various situations.

[0003] In related technologies, the processing strategy of the fuel cell system usually only selects one processing measure based on the current state of the system, such as emergency shutdown, but there is no guarantee that the system can return to normal after the processing measure, which may affect the system performance and service life. Summary of the Invention

[0004] The present application provides a fuel cell system fault handling method, device, equipment and medium to solve the problem in the related art that the fuel cell system fault response strategy may affect the system performance and service life.

[0005] In a first aspect, the present application provides a fuel cell system fault handling method, the method comprising:

[0006] In response to the received operating data of the fuel cell system, determining that at least one element in the fuel cell system is in an abnormal state;

[0007] Determine and implement abnormal state control strategies for the fuel cell system based on operating data, including emergency shutdowns;

[0008] If the abnormal state control strategy is emergency shutdown, determine the corresponding emergency stop recovery strategy based on the fuel cell system state after the emergency shutdown;

[0009] Based on the emergency stop recovery strategy, the fuel cell system in the emergency stop state is restored.

[0010] In one embodiment of the present disclosure, in response to received operating data of the fuel cell system, determining that at least one element in the fuel cell system is in an abnormal state includes: in response to received operating data of the fuel cell system, if there is at least one operating data located in an abnormal numerical range of corresponding type data, determining that at least one element in the fuel cell system is in an abnormal state.

[0011] In one embodiment of the present disclosure, the abnormal numerical value interval includes a first abnormal numerical value interval having the smallest difference from the normal numerical value interval of the operating data, a second abnormal numerical value interval having an intermediate difference from the normal numerical value interval of the operating data, and a third abnormal numerical value interval having the largest difference from the normal numerical value interval of the operating data; based on the operating data, determining and implementing an abnormal state control strategy corresponding to the fuel cell system, including: if the operating data is in the first abnormal numerical value interval, determining that the abnormal state control strategy is to perform power limiting processing on the component in the abnormal state; if the operating data is in the second abnormal numerical value interval, determining that the abnormal state control strategy is to start a shutdown process for the component in the abnormal state; if the operating data is in the third abnormal numerical value interval, determining that the abnormal state control strategy is to perform emergency shutdown of the fuel cell system; based on the determined abnormal state control strategy, controlling and processing the corresponding component in the fuel cell system or the fuel cell system.

[0012] In one embodiment of the present disclosure, if the abnormal state control strategy is an emergency shutdown, a corresponding emergency stop recovery strategy is determined based on the state of the fuel cell system after the emergency shutdown, including: if the abnormal state control strategy is an emergency shutdown, recording the cumulative time after the fuel cell system performs the emergency shutdown; if the fuel cell system receives a restart instruction, recording the power supply time of the fuel cell system restarting and supplying power to the outside; determining the number of emergency stops of the fuel cell system when the cumulative time is greater than 0; and determining the emergency stop recovery strategy based on the number of emergency stops, the cumulative time and the power supply time.

[0013] In one embodiment of the present disclosure, an emergency stop recovery strategy is determined based on the number of emergency stops, the cumulative duration and the power supply duration, including: if the cumulative duration is greater than the first set duration and the power supply duration is zero, the emergency stop recovery strategy is determined to be purging the fuel cell system; if the power supply duration is greater than the second set duration, and the number of emergency stops is 0 during the power supply duration from 0 to the second set duration, the emergency stop recovery strategy is determined to be clearing the number of emergency stops and the cumulative duration; if the number of emergency stops is greater than the first set number during the power supply duration from 0 to the second set duration, the emergency stop recovery strategy is determined to switch the fuel cell system to sleep mode until the purging process is completed; and the fuel-electric system state is switched to normal standby state.

[0014] In one embodiment of the present disclosure, the purge process is implemented in the following manner: determining that the components in the fuel cell system have passed the low-voltage self-test, and controlling the DCDC converter and the main contactor to execute the pre-charge high-voltage instruction; introducing hydrogen into the fuel cell system for purge; introducing air into the fuel cell system, and continuing to purge for a third set time; stopping the introduction of air, and monitoring the single-chip voltage in the fuel cell system until the single-chip voltage is lower than the set voltage value; stopping the introduction of hydrogen, and disconnecting the DCDC converter from the main contactor.

[0015] In one embodiment of the present disclosure, the third set time period is determined based on the ambient temperature of the fuel cell system, and the third set time period is negatively correlated with the ambient temperature.

[0016] In a second aspect, an embodiment of the present disclosure provides a fuel cell system fault processing device, the fuel cell system fault processing device comprising:

[0017] an acquisition module, configured to determine, in response to received operating data of the fuel cell system, that at least one element in the fuel cell system is in an abnormal state;

[0018] An implementation module, configured to determine and implement an abnormal state control strategy corresponding to the fuel cell system based on the operating data, the abnormal state control strategy including emergency shutdown;

[0019] A recovery module, configured to determine a corresponding emergency stop recovery strategy based on the fuel cell system state after the emergency stop if the abnormal state control strategy is an emergency stop;

[0020] The processing module is used to perform recovery processing on the fuel cell system in an emergency stop state based on the emergency stop recovery strategy.

[0021] Optionally, the acquisition module is specifically configured to, in response to the received operating data of the fuel cell system, determine that at least one element in the fuel cell system is in an abnormal state if at least one operating data is located in an abnormal value interval of corresponding type of data.

[0022] Optionally, the implementation module is specifically used to, if the abnormal numerical interval includes a first abnormal numerical interval with the smallest difference from the normal numerical interval of the operating data, a second abnormal numerical interval with a middle difference from the normal numerical interval of the operating data, and a third abnormal numerical interval with the largest difference from the normal numerical interval of the operating data; if the operating data is in the first abnormal numerical interval, determine that the abnormal state control strategy is to perform power limitation processing on the component in the abnormal state; if the operating data is in the second abnormal numerical interval, determine that the abnormal state control strategy is to start the shutdown process for the component in the abnormal state; if the operating data is in the third abnormal numerical interval, determine that the abnormal state control strategy is to emergency shut down the fuel cell system; based on the determined abnormal state control strategy, control processing is performed on the corresponding component in the fuel cell system or the fuel cell system.

[0023] Optionally, the recovery module is specifically used to, if the abnormal state control strategy is emergency shutdown, record the cumulative time after the fuel cell system executes emergency shutdown; if the fuel cell system receives a restart instruction, record the power supply time of the fuel cell system restarting and supplying power to the outside; determine the number of emergency stops of the fuel cell system when the cumulative time is greater than 0; determine the emergency stop recovery strategy based on the number of emergency stops, cumulative time and power supply time.

[0024] Optionally, the recovery module is specifically used to, if the cumulative duration is greater than a first set duration and the power supply duration is zero, determine the emergency stop recovery strategy as purging the fuel cell system; if the power supply duration is greater than a second set duration, and the number of emergency stops is 0 during the power supply duration from 0 to the second set duration, determine the emergency stop recovery strategy as clearing the number of emergency stops and the cumulative duration; if the number of emergency stops is greater than the first set number during the power supply duration from 0 to the second set duration, determine the emergency stop recovery strategy as switching the fuel cell system to sleep mode until the purging process is completed; and switch the fuel cell system state to normal standby state.

[0025] Optionally, the processing module is specifically used to implement purge processing in the following manner: determine whether the components in the fuel cell system have passed the low-voltage self-test, and control the DCDC converter and the main contactor to execute the pre-charge high-voltage instruction; introduce hydrogen into the fuel cell system for purge; introduce air into the fuel cell system, and continue to purge for a third set time; stop introducing air, and monitor the single-chip voltage in the fuel cell system until the single-chip voltage is lower than the set voltage value; stop introducing hydrogen, and disconnect the DCDC converter from the main contactor.

[0026] Optionally, the processing module specifically includes: the third set time is determined based on the ambient temperature of the fuel cell system, and the third set time is negatively correlated with the ambient temperature.

[0027] In a third aspect, an embodiment of the present application provides a control device, including: a memory, a processor;

[0028] Memory stores computer-executable instructions;

[0029] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the method for handling a fuel cell system fault according to the first aspect of the present disclosure.

[0030] In a fourth aspect, an embodiment of the present disclosure further provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are executed by a processor, they are used to implement the fuel cell system fault handling method as described in the first aspect of the present disclosure.

[0031] In a fifth aspect, an embodiment of the present disclosure further provides a computer program product, which includes computer execution instructions. When the computer execution instructions are executed by a processor, they are used to implement the fuel cell system fault handling method as described in the first aspect of the present disclosure.

[0032] The fuel cell system fault handling method, device, equipment and medium provided by the embodiments of the present disclosure implement the corresponding abnormal state control strategy when the fuel cell system is in an abnormal state, especially after an emergency shutdown, and determine the emergency stop recovery strategy based on the system state, thereby effectively solving the impact of multiple emergency shutdowns on system performance and life in the prior art. By refining the fault classification and response strategy, it is ensured that the system is promptly restored after an emergency shutdown, and the damage caused to the fuel cell equipment by frequent shutdowns and recovery is reduced. At the same time, the recovery strategy is dynamically adjusted according to the state of the fuel cell system after the emergency shutdown, thereby improving the safety and reliability of the system and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0034] Figure 1 A diagram illustrating an application scenario of the fuel cell system fault handling method, apparatus, device, and medium provided in an embodiment of the present disclosure;

[0035] Figure 2 A flowchart of a fuel cell system fault handling method provided by one embodiment of the present disclosure;

[0036] Figure 3 A flowchart of a fuel cell system fault processing method provided by another embodiment of the present disclosure;

[0037] Figure 4 A schematic structural diagram of a fuel cell system fault handling device provided in yet another embodiment of the present disclosure;

[0038] Figure 5 A schematic structural diagram of a control device provided in yet another embodiment of the present disclosure.

[0039] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0040] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0041] As a clean energy technology, hydrogen fuel cells have been extensively researched for their application in equipment power systems, particularly in fuel cell engines. To ensure the safety and reliability of fuel cell systems, developing effective fault handling strategies is crucial. These strategies must not only guarantee system safety under various operating conditions but also respond quickly to faults to prevent further damage. Efficient fault diagnosis and handling methods can improve overall system performance, extend service life, and reduce maintenance costs, making them a key area of ​​research in fuel cell technology.

[0042] However, existing fuel cell system fault handling methods typically only select a single action based on the current system state, such as an emergency shutdown. While this approach can prevent further damage in the short term, it fails to ensure that the system returns to normal operation after treatment, potentially leading to a decrease in system performance and service life. The lack of effective classification of fault severity and targeted recovery strategies has prevented the system from recovering to a safe and stable state in a timely manner after multiple emergency shutdowns. Therefore, there is an urgent need for a fault handling method that can implement an effective recovery strategy after an emergency shutdown to address these existing problems.

[0043] The fuel cell system fault handling method, apparatus, equipment, and medium provided in this application monitor the operating data of the fuel cell system in real time to identify and determine that at least one component in the system is in an abnormal state. Based on the severity of the fault, a corresponding abnormal state control strategy is implemented. After an emergency shutdown, an emergency stop recovery strategy is formulated and executed based on the current state of the system to ensure that the system can be effectively recovered. This effectively solves the problem of system performance degradation and shortened life caused by multiple emergency stops in the prior art, improves the safety and reliability of the fuel cell system, and extends its service life.

[0044] Figure 1 Schematic diagram of the application scenario of the fuel cell system fault handling method, device, equipment and medium provided in this application, such as Figure 1 As shown, in the fuel cell system fault processing, the control unit 100 controls the fuel cell system to take corresponding methods to process the fault according to the fault of the fuel cell system 110, thereby ensuring the safety and availability of the fuel cell system.

[0045] It should be noted that Figure 1 The scenario shown includes only one or a specific number of control units and fuel cell systems for illustration, but the present disclosure is not limited to this. That is, the number of control units and fuel cell systems can be arbitrary.

[0046] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0047] Figure 2 This is a flow chart of the fuel cell system fault handling method provided in the embodiment of the present application. Figure 2 , the main process of fuel cell system troubleshooting is explained:

[0048] S201 : In response to received operating data of a fuel cell system, determine that at least one element in the fuel cell system is in an abnormal state.

[0049] Specifically, the executing body of the embodiment of the present disclosure is a control module or control unit that can control the operation of the fuel cell system. It can be a built-in control chip in the fuel cell system, or it can be a control module of the vehicle or engineering equipment where the fuel cell system is located. For the convenience of explanation, it will be collectively referred to as a control unit in the following.

[0050] During the operation of the fuel cell system, it will monitor the operating status of the system in real time through a series of sensors and data acquisition components.

[0051] These sensors may include temperature sensors, pressure sensors, voltage sensors, etc. Through these sensors, the control unit can monitor in real time whether the fuel cell system has an abnormal state that deviates from the normal operating range.

[0052] For example, if a sensor detects that the temperature of a battery cell is too high or that the voltage fluctuates abnormally, the control unit will flag it as a potential fault.

[0053] By timely detecting and responding to abnormal situations, the downtime of the control unit can be effectively reduced and the overall operating efficiency can be improved.

[0054] S202 : Determine and implement an abnormal state control strategy corresponding to the fuel cell control unit based on the operating data.

[0055] Among them, the abnormal state control strategy includes emergency shutdown.

[0056] Specifically, after identifying an abnormal state, the control unit needs to determine the nature and severity of the abnormality based on the specific distribution of the operating data, and thus select an appropriate control strategy.

[0057] First, the control unit will classify the degree of abnormality in the operating data, determining whether it is a minor abnormality or a major fault. For minor abnormalities, the control unit may only need to adjust certain parameters or perform simple corrections to restore normal operation.

[0058] However, for serious abnormalities, especially those that may threaten the safety of the control unit, the control unit will choose to implement an emergency shutdown strategy.

[0059] Emergency stop is a protective measure designed to immediately stop the operation of the control unit to prevent further deterioration of the fault.

[0060] In this way, the control unit can take the best response measures in different fault scenarios, thereby quickly curbing the impact of the fault, protecting the overall safety of the fuel cell system, and avoiding greater losses caused by the spread of the fault.

[0061] S203: If the abnormal state control strategy is emergency shutdown, determine a corresponding emergency stop recovery strategy based on the fuel cell system state after the emergency shutdown.

[0062] Specifically, after an emergency shutdown, the control unit needs to perform a detailed assessment of the current status in order to develop an appropriate recovery strategy.

[0063] Specific status assessments may include the physical state within the fuel cell system, environmental conditions, and the specific nature of the fault.

[0064] For example, the control unit can check the status of individual components, especially those critical parts that may be affected during an outage, and evaluate environmental conditions such as temperature and humidity, combined with an analysis of the specific nature of the fault to determine whether special recovery measures are needed.

[0065] This comprehensive assessment enables the control unit to develop an effective recovery strategy, ensuring that no new issues are introduced during the recovery process.

[0066] For example, if an outage results in water accumulation inside the fuel cell system, the recovery strategy may include draining and drying operations.

[0067] This can provide a guarantee for the safe recovery of the fuel cell system, ensuring that the fuel cell system can resume normal operation in the shortest time possible while avoiding secondary failures caused by improper recovery.

[0068] S204: Based on the emergency stop recovery strategy, perform recovery processing on the fuel cell control unit in the emergency stop state.

[0069] Specifically, after determining the emergency stop recovery strategy, the control unit will control the fuel cell system to enter the actual recovery operation phase.

[0070] The goal of this phase is to restore the control unit to normal working condition through a series of orderly operations.

[0071] In addition to the operations in the emergency stop recovery strategy (such as purge operation), the control unit may also need to control the fuel cell system to perform functional tests on various components to ensure that they can work normally after recovery, such as electrical tests, mechanical tests, etc., to verify the overall performance of the control unit.

[0072] By implementing these recovery measures, the control unit can avoid long-term damage caused by an emergency stop and ensure continued stable and efficient operation after recovery. This extends the service life of the fuel cell system, reduces downtime caused by faults, and improves the overall reliability and efficiency of the fuel cell system.

[0073] The fuel cell system fault handling method provided in the embodiment of the present application implements the corresponding abnormal state control strategy when the fuel cell system is in an abnormal state, especially after an emergency shutdown, and determines the emergency stop recovery strategy based on the system state, thereby effectively solving the impact of multiple emergency shutdowns on system performance and life in the prior art. By refining the fault classification and response strategy, it ensures that the system is promptly restored after an emergency shutdown, and the damage caused to the fuel cell equipment by frequent shutdowns and recovery is reduced. At the same time, the recovery strategy is dynamically adjusted according to the state of the fuel cell system after the emergency shutdown, thereby improving the safety and reliability of the system and extending its service life.

[0074] Figure 3 Another embodiment of the present disclosure provides a method for handling a fuel cell system fault. Figure 2 Based on the embodiment shown, the following Figure 3 , the implementation process of the fuel cell system fault handling method is described in detail, which specifically includes the following steps:

[0075] S301 : In response to received operating data of a fuel cell system, if at least one operating data is located in an abnormal value interval of corresponding type of data, determine that at least one component in the fuel cell system is in an abnormal state.

[0076] Specifically, in this step, the fuel cell system continuously monitors the system's operating status through sensors and data acquisition equipment. The control unit compares the acquired operating data with a pre-set normal value range to identify any abnormalities.

[0077] In the embodiment of the present disclosure, the abnormal numerical value interval is subdivided into three levels: a first abnormal numerical value interval having the smallest difference from the normal numerical value interval of the operating data, a second abnormal numerical value interval having an intermediate difference from the normal numerical value interval of the operating data, and a third abnormal numerical value interval having the largest difference from the normal numerical value interval of the operating data.

[0078] The first abnormal value interval represents a slight deviation from the normal value, the second abnormal value interval represents a moderate deviation, and the third abnormal value interval indicates a severe deviation.

[0079] This classification allows the control unit to more accurately determine the severity of the fault and take appropriate measures. This enables a refined fault detection mechanism, allowing the control unit to take more precise response measures under different fault severities, thereby improving the effectiveness and overall reliability of fault handling.

[0080] S302: If the operating data is in a first abnormal value interval, determine that the abnormal state control strategy is to perform power limitation processing on the component in the abnormal state.

[0081] Specifically, when the control unit detects that the operating data of a component is in the first abnormal value interval, this indicates that the state of the component is only slightly deviated from the normal range. In this case, the control unit can choose to implement power limitation processing as a control strategy.

[0082] This strategy reduces the component's power output, alleviating its load and mitigating the risk of further deterioration. Power limiting is achieved by adjusting control parameters to ensure the component operates within a safe range. For example, if the voltage of a single battery cell deviates from its normal operating range of around 800V to around 600V, its power can be reduced by half to see if it can return to normal operation.

[0083] This prevents minor faults from turning into more serious problems, extends component life, and maintains system stability without affecting overall system performance.

[0084] S303: If the operating data is in the second abnormal value interval, determine that the abnormal state control strategy is to start a shutdown process for the component in the abnormal state.

[0085] Specifically, if a component's operating data is detected within the second abnormal value range, this indicates that the component's status has deviated moderately from the normal range, potentially posing a threat to system safety. In this case, the system initiates the component's corresponding normal shutdown process to protect it and its associated components. For example, in the aforementioned example, if the voltage of a single battery cell drops below 300V, it must be shut down to avoid a safety incident.

[0086] The shutdown process involves gradually reducing the load on the component until it stops operating completely.

[0087] This can avoid impacts on other system components, prevent further damage to the system caused by moderate faults, and ensure the safety and stability of the system in the event of a fault.

[0088] S304: If the operating data is in the third abnormal value interval, determine that the abnormal state control strategy is to shut down the fuel cell system urgently.

[0089] Specifically, when it is detected that the operating data of a component is in the third abnormal value interval, this indicates that the status of the component seriously deviates from the normal range, which may cause a major failure of the system. For example, in the above example, if the voltage of a single battery drops below 100V, it means that there may be a serious problem.

[0090] In this case, an emergency shutdown strategy needs to be implemented immediately to prevent the fault from spreading further.

[0091] Different from the previous two measures, the third abnormal value range may have an impact on the entire system. Therefore, it is not limited to the processing strategy of a single component, but a holistic processing strategy for the entire system.

[0092] Emergency shutdown is a rapid response measure that immediately stops system operation to protect core components from damage. This can quickly contain the impact of a failure in extreme cases, ensure system safety, and prepare for subsequent recovery.

[0093] S305 : Based on the determined abnormal state control strategy, control processing is performed on the corresponding element in the fuel cell system or the fuel cell system.

[0094] Specifically, after determining the corresponding abnormal state control strategy, the control unit controls the fuel cell system to perform specific control operations.

[0095] S306: If the abnormal state control strategy is emergency shutdown, record the cumulative time after the fuel cell system executes emergency shutdown.

[0096] Specifically, after the emergency shutdown is implemented, the system begins to record the cumulative duration of the shutdown.

[0097] The cumulative duration record is used to help the control unit evaluate the impact of the emergency shutdown on the system and provide data support for subsequent recovery operations.

[0098] By monitoring the accumulated time, we can better judge the changes in the status of the fuel cell system after shutdown and adjust the recovery strategy when necessary.

[0099] S307: If the fuel cell system receives a restart instruction, the duration of the fuel cell system restarting and supplying power to the outside is recorded.

[0100] Specifically, after an emergency shutdown, the fuel cell system may receive an instruction from the user or other system to restart the system (such as a maintenance personnel instructing a restart after performing an inspection, or attempting to restart without finding a specific abnormal cause). At this time, the control unit will start recording the power supply time when it receives the restart instruction and restores power supply.

[0101] This allows the system to evaluate the operating status after recovery and provide data support for subsequent performance analysis.

[0102] The record of power supply duration can help the control unit identify potential problems during the recovery process and make adjustments when necessary to ensure that all components of the system can operate normally during the recovery process and avoid secondary failures caused by improper recovery.

[0103] S308: Determine the number of emergency shutdowns performed when the cumulative duration of the fuel cell system is greater than 0.

[0104] Specifically, after recording the cumulative downtime, the control unit evaluates the frequency of downtime, or the number of emergency stops. This determines the frequency of the fault, identifies its severity, and adjusts the recovery strategy if necessary. By monitoring the number of emergency stops, the system ensures that appropriate measures are taken during the recovery process to prevent the fault from recurring.

[0105] S309: Determine an emergency stop recovery strategy based on the number of emergency stops, the accumulated duration, and the power supply duration.

[0106] Specifically, after analyzing the number of emergency stops, the cumulative duration, and the power supply duration, the control unit can determine the corresponding emergency stop recovery strategy to ensure that the best measures are taken during the recovery process.

[0107] The specific emergency stop recovery strategy may include various measures, such as purge processing, sleep mode switching, etc. This part is further explained below.

[0108] Furthermore, the determination of the emergency stop recovery strategy specifically includes the following steps:

[0109] Step A1: If the accumulated time is greater than the first set time and the power supply time is zero, determine that the emergency stop recovery strategy is to purge the fuel cell system.

[0110] Specifically, in this case, it means that the system continues to be unable to start, which is usually due to internal water accumulation that may occur due to long-term shutdown. At this time, through the purge process, by introducing gas to remove residual moisture inside the system, it can ensure the dryness and cleanliness of the system, effectively prevent long-term damage to the system by moisture, and ensure that the system can operate normally after recovery.

[0111] The first design duration can be half an hour, one hour, or any other time, and there is no restriction here.

[0112] Step A2: If the power supply duration is greater than the second set duration, and the number of emergency stops is 0 during the power supply duration from 0 to the second set duration, the emergency stop recovery strategy is determined to clear the number of emergency stops and the accumulated duration.

[0113] Specifically, in this case, it means that the system has been started normally and restored to normal working state, which means that the identified fault has been effectively resolved, so the number of emergency stops and the accumulated duration are reset, and the emergency stop recovery state is ended.

[0114] The second set duration can be one hour, two hours or any other time, and there is no restriction here.

[0115] Step A3: If the number of emergency stops is greater than the first set number during the power supply time from 0 to the second set time, the emergency stop recovery strategy is determined to switch the fuel cell system to a sleep mode until the purge process is completed.

[0116] Specifically, in this case, it indicates that the faults are recognized to occur frequently, and therefore the entire system needs to enter a sleep mode to prevent further damage.

[0117] Hibernation mode reduces the possibility of failure by lowering the system's activity level. The system cannot be started until it is confirmed that the system has been purged, preventing damage caused by frequent failures and ensuring that the system can operate safely during the recovery process.

[0118] Step A4: Switch the fuel-electric system to a normal standby state.

[0119] Specifically, after completing all necessary recovery operations, the system will switch to a normal standby state and prepare to resume normal operation, thereby ensuring that the system can immediately respond to external commands and resume normal working state after recovery.

[0120] S310: Based on the emergency stop recovery strategy, the fuel cell system in the emergency stop state is restored.

[0121] Specifically, after the emergency stop recovery strategy is formulated, the system enters the actual recovery operation phase. The goal of this phase is to restore the system to normal working state through a series of orderly operations.

[0122] As mentioned in the above embodiment, the control unit may control the fuel cell system to perform a purge process, and its action actually includes action steps, which will be further explained below.

[0123] In some embodiments, the purge process is achieved by the following steps:

[0124] Step B1: Determine whether the components in the fuel cell system have passed the low-voltage self-test, and control the DCDC converter and the main contactor to execute the pre-charge high-voltage instruction.

[0125] Specifically, before the purge process begins, the control unit controls the fuel cell system to first perform a low-voltage self-test to ensure that all components are in an operational state. The self-test checks the basic functions of each component to ensure that no unexpected failures occur during the purge process.

[0126] Next, the system controls the DCDC converter and the main contactor to execute the pre-charge high-voltage instruction to prepare for the subsequent purge operation, ensuring the safety and effectiveness of the system during the purge process.

[0127] In addition, the control unit will also obtain high and low voltage electricity and hydrogen gas sources from the external side of the fuel cell system (such as the vehicle system or engineering equipment system) for purging.

[0128] Step B2: introducing hydrogen into the fuel cell system for purging.

[0129] Specifically, after the self-test is complete, the system opens the valves that control hydrogen inlet to the reactor, allowing hydrogen to enter the reactor for a preliminary purge. The introduction of hydrogen helps remove residual moisture and other impurities within the system, ensuring a clean and dry system, preventing long-term damage from moisture and ensuring normal operation after recovery.

[0130] Step B3: introducing air into the fuel cell system and continuing the purge for a third set time period.

[0131] The third set time duration is determined based on the ambient temperature of the fuel cell system, and the third set time duration is negatively correlated with the ambient temperature.

[0132] Specifically, after the hydrogen purge, the control unit controls the opening of the air-related on / off valve, thereby introducing air for further purge. The introduction of air helps to completely remove residues inside the system and ensure the cleanliness of the system.

[0133] The purge time is dynamically adjusted according to the ambient temperature. The lower the ambient temperature, the longer the purge time, to ensure the purge effect under different conditions.

[0134] Step B4: stop introducing air and monitor the single-chip voltage in the fuel cell system until the single-chip voltage is lower than the set voltage value.

[0135] Specifically, after the air purge is complete, the control unit closes the corresponding air on / off valve, stopping the introduction of air and beginning to monitor the single-chip voltage. By monitoring the voltage, the control unit can determine the effectiveness of the purge and ensure that the system is in a safe state.

[0136] The principle here is that when a mixture of air and hydrogen exists in the fuel cell system, the voltage of the single-cell battery (i.e., the single-cell voltage) will be at a higher value. When the air is removed and only hydrogen is left, the voltage of the single-cell battery will drop to a normal value. Therefore, through voltage monitoring, the safety and stability of the system can be ensured, and failures caused by improper purge can be avoided (when air is present, the mixture of air and hydrogen will affect the safety of the fuel cell system).

[0137] Step B5: Stop the introduction of hydrogen and disconnect the DCDC converter from the main contactor.

[0138] Specifically, after the air is completely cleared, the control unit will close the corresponding switch valve, stop the introduction of hydrogen, and disconnect the DCDC converter from the main contactor, thereby completing the purge process.

[0139] At this point, the system is ready to resume normal operation and receive instructions for external power supply.

[0140] The fuel cell system fault handling method provided in the embodiments of the present disclosure classifies faults into different severity levels by refining the abnormal numerical value intervals and implementing corresponding control strategies for each situation, such as power limiting, shutdown procedures, and emergency shutdowns. By recording and analyzing the number of emergency stops, the cumulative duration, and the power supply duration, the system can formulate dynamic emergency stop recovery strategies, including purge processing and sleep mode switching. This effectively improves the accuracy of fault handling and the efficiency of system recovery, ensuring the safety, reliability, and service life of the fuel cell system.

[0141] Figure 4 This is a schematic diagram of the structure of a fuel cell system fault handling device provided by one embodiment of the present disclosure. Figure 4 As shown, the fuel cell system fault processing device 400 includes:

[0142] an acquisition module 410 for determining, in response to received operating data of the fuel cell system, that at least one element in the fuel cell system is in an abnormal state;

[0143] An implementation module 420 is configured to determine and implement an abnormal state control strategy corresponding to the fuel cell system based on the operating data, wherein the abnormal state control strategy includes an emergency shutdown;

[0144] A recovery module 430 is configured to determine a corresponding emergency stop recovery strategy based on the fuel cell system state after the emergency stop if the abnormal state control strategy is an emergency stop;

[0145] The processing module 440 is configured to perform recovery processing on the fuel cell system in an emergency stop state based on an emergency stop recovery strategy.

[0146] Optionally, the acquisition module 410 is specifically configured to, in response to the received operating data of the fuel cell system, determine that at least one element in the fuel cell system is in an abnormal state if at least one operating data is located in an abnormal value interval of corresponding type of data.

[0147] Optionally, the implementation module 420 is specifically used to, if the abnormal numerical value interval includes a first abnormal numerical value interval with the smallest difference from the normal numerical value interval of the operating data, a second abnormal numerical value interval with a middle difference from the normal numerical value interval of the operating data, and a third abnormal numerical value interval with the largest difference from the normal numerical value interval of the operating data; if the operating data is in the first abnormal numerical value interval, determine that the abnormal state control strategy is to perform power limitation processing on the component in the abnormal state; if the operating data is in the second abnormal numerical value interval, determine that the abnormal state control strategy is to start the shutdown process for the component in the abnormal state; if the operating data is in the third abnormal numerical value interval, determine that the abnormal state control strategy is to emergency shut down the fuel cell system; based on the determined abnormal state control strategy, control processing is performed on the corresponding component in the fuel cell system or the fuel cell system.

[0148] Optionally, the recovery module 430 is specifically used to, if the abnormal state control strategy is emergency shutdown, record the cumulative time after the fuel cell system executes emergency shutdown; if the fuel cell system receives a restart instruction, record the power supply time of the fuel cell system restarting and supplying power to the outside; determine the number of emergency stops of the fuel cell system when the cumulative time is greater than 0; determine the emergency stop recovery strategy based on the number of emergency stops, cumulative time and power supply time.

[0149] Optionally, the recovery module 430 is specifically used to, if the cumulative duration is greater than the first set duration and the power supply duration is zero, determine the emergency stop recovery strategy as purging the fuel cell system; if the power supply duration is greater than the second set duration, and the number of emergency stops is 0 during the power supply duration from 0 to the second set duration, determine the emergency stop recovery strategy as clearing the number of emergency stops and the cumulative duration; if the number of emergency stops is greater than the first set number during the power supply duration from 0 to the second set duration, determine the emergency stop recovery strategy as switching the fuel cell system to sleep mode until the purging process is completed; and switch the fuel cell system state to normal standby state.

[0150] Optionally, the processing module 440 is specifically used to implement purge processing in the following manner: determine whether the components in the fuel cell system have passed the low-voltage self-test, and control the DCDC converter and the main contactor to execute the pre-charge high-voltage instruction; introduce hydrogen into the fuel cell system for purge; introduce air into the fuel cell system, and continue to purge for a third set time; stop introducing air, and monitor the single-chip voltage in the fuel cell system until the single-chip voltage is lower than the set voltage value; stop introducing hydrogen, and disconnect the DCDC converter from the main contactor.

[0151] Optionally, the processing module 440 specifically includes: determining the third set time based on the ambient temperature of the fuel cell system, and the third set time is negatively correlated with the ambient temperature.

[0152] In this embodiment, the fuel cell system fault handling device solves the problem in related technologies that fuel cell system fault response strategies may affect system performance and service life through the combination of various modules.

[0153] Figure 5 A schematic diagram of the structure of a control device provided in one embodiment of the present disclosure is shown in FIG. Figure 5 As shown, the control device 500 includes: a memory 510 and a processor 520.

[0154] The memory 510 stores a computer program that can be executed by at least one processor 520. The computer program is executed by at least one processor 520 to enable the control device to implement the battery SOC estimation method provided in any of the above embodiments.

[0155] The memory 510 and the processor 520 may be connected via a bus 530 .

[0156] The relevant instructions can be understood by referring to the relevant descriptions and effects corresponding to the method embodiments, which will not be repeated here.

[0157] An embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon. The computer program is executed by a processor to implement the fuel cell system fault handling method provided in any of the above embodiments.

[0158] The computer-readable storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, or the like.

[0159] One embodiment of the present disclosure provides a computer program product, which includes computer-executable instructions. When the computer-executable instructions are executed by a processor, they are used to implement the fuel cell system fault processing method provided in any of the above embodiments.

[0160] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing the relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When executed, the program can include the processes in the above-described method embodiments. The storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

[0161] In the above embodiments, the description of each embodiment has its own emphasis. For parts not described in detail in a particular embodiment, please refer to the relevant description of other embodiments. The technical features of the above embodiments can be combined in any way. To keep the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0162] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0163] It should be understood that the present application is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A method for handling a fuel cell system fault, characterized in that: The steps include: In response to the received operating data of the fuel cell system, determining that at least one element in the fuel cell system is in an abnormal state; Determining and implementing an abnormal state control strategy corresponding to the fuel cell system based on the operating data, the abnormal state control strategy including an emergency shutdown; If the abnormal state control strategy is an emergency shutdown, determining a corresponding emergency stop recovery strategy based on the fuel cell system state after the emergency shutdown; Based on the emergency stop recovery strategy, the fuel cell system in the emergency stop state is restored.

2. The method according to claim 1, characterized in that In response to received operating data of the fuel cell system, determining that at least one element in the fuel cell system is in an abnormal state includes: In response to the received operating data of the fuel cell system, if at least one operating data is located in an abnormal value interval of the corresponding type of data, it is determined that at least one element in the fuel cell system is in an abnormal state.

3. The method according to claim 2, characterized in that The abnormal value interval includes a first abnormal value interval with the smallest difference from the normal value interval of the operating data, a second abnormal value interval with an intermediate difference from the normal value interval of the operating data, and a third abnormal value interval with the largest difference from the normal value interval of the operating data; The determining and implementing the abnormal state control strategy corresponding to the fuel cell system based on the operating data includes: If the operating data is in a first abnormal value interval, determining that the abnormal state control strategy is to perform power limitation processing on the component in the abnormal state; If the operating data is in a second abnormal value interval, determining that the abnormal state control strategy is to initiate a shutdown process for the component in the abnormal state; If the operating data is within a third abnormal value interval, determining that the abnormal state control strategy is to urgently shut down the fuel cell system; Based on the determined abnormal state control strategy, control processing is performed on corresponding elements in the fuel cell system or the fuel cell system.

4. The method according to any one of claims 1 to 3, characterized in that If the abnormal state control strategy is an emergency shutdown, a corresponding emergency stop recovery strategy is determined based on the fuel cell system state after the emergency shutdown, including: If the abnormal state control strategy is emergency shutdown, record the cumulative time after the fuel cell system performs emergency shutdown; If the fuel cell system receives a restart instruction, recording the power supply duration of the fuel cell system restarting and supplying power to the outside; determining a number of emergency stops of the fuel cell system when the accumulated time is greater than 0; The emergency stop recovery strategy is determined based on the number of emergency stops, the accumulated duration, and the power supply duration.

5. The method according to claim 4, characterized in that The determining the emergency stop recovery strategy based on the number of emergency stops, the accumulated duration, and the power supply duration includes: If the accumulated time is greater than a first set time and the power supply time is zero, determining that the emergency stop recovery strategy is to purge the fuel cell system; If the power supply duration is greater than the second set duration, and the number of emergency stops is 0 during the process of the power supply duration changing from 0 to the second set duration, then the emergency stop recovery strategy is determined to be clearing the number of emergency stops and the accumulated duration; If the number of emergency stops is greater than the first set number during the process of the power supply duration from 0 to the second set duration, determining that the emergency stop recovery strategy is to switch the fuel cell system to a sleep mode until the purge process is completed; Switch the fuel-electric system to normal standby mode.

6. The method according to claim 5, characterized in that The purging process is achieved by: Determining that components in the fuel cell system pass a low-voltage self-test, and controlling a DC-DC converter and a main contactor to execute a pre-charge high-voltage instruction; Passing hydrogen into the fuel cell system for purging; Passing air into the fuel cell system and continuing to purge for a third set time period; Stopping the introduction of air and monitoring the single-chip voltage in the fuel cell system until the single-chip voltage is lower than a set voltage value; The hydrogen supply is stopped, and the connection between the DCDC converter and the main contactor is disconnected.

7. The method according to claim 6, characterized in that The third set time duration is determined based on the ambient temperature of the fuel cell system, and the third set time duration is negatively correlated with the ambient temperature.

8. A fuel cell system fault handling device, characterized in that: The fuel cell system fault processing device includes: an acquisition module, configured to determine, in response to received operating data of the fuel cell system, that at least one element in the fuel cell system is in an abnormal state; an implementation module, configured to determine and implement an abnormal state control strategy corresponding to the fuel cell system based on the operating data, the abnormal state control strategy including an emergency shutdown; A recovery module, configured to determine a corresponding emergency stop recovery strategy based on the fuel cell system state after the emergency stop if the abnormal state control strategy is an emergency stop; The processing module is used to perform recovery processing on the fuel cell system in an emergency stop state based on the emergency stop recovery strategy.

9. A control device, characterized in that: include: Memory, processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 7 when executed by a processor.

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