Control method and system for timed wake-up safety detection of fuel cell system and vehicle
Through the dual wake-up mechanism and the cloud platform forced wake-up mechanism, the safety hazards and high energy consumption problems caused by the failure of the RTC module of fuel cell vehicles are solved, and the timeliness and energy saving of safety detection of fuel cell vehicles are achieved, which is suitable for the popularization of fuel cell vehicles.
Patent Information
- Application Number
- CN202510865480.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-26
- Publication Date
- 2025-09-16
AI Technical Summary
The existing fuel cell vehicle timed wake-up technology has the risk of RTC module failure, which makes it impossible to perform hydrogen leakage detection and stack health management in a timely manner, resulting in safety hazards. The real-time monitoring method also leads to high energy consumption and high costs.
A dual wake-up trigger mechanism is adopted, through scheduled wake-up and cloud platform forced wake-up mechanism, combined with real-time acquisition of key task wake-up intervals to ensure the timeliness and energy saving of safety detection, including hydrogen leak detection, purge and conductivity adjustment. The cloud platform is used to wake up the vehicle controller and fuel cell system controller, providing a backup wake-up path.
It realizes timely detection of the safety status of the fuel cell system in an energy-saving state, reduces the risk of RTC module failure, ensures the safety and reliability of the vehicle, avoids the addition of additional hardware equipment, and is suitable for the large-scale popularization of fuel cell vehicles.
Smart Images
Figure CN120657173A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the field of fuel cells, and in particular relates to a control method, system and vehicle for timed wake-up safety detection of a fuel cell system. Background Art
[0002] Fuel cells, as clean and efficient energy conversion devices, are expected to be widely used in the automotive sector in the future. Fuel cell vehicles achieve zero-emission environmental protection by converting chemical energy (hydrogen and oxygen) into electricity to drive electric motors. However, fuel cell vehicles still face numerous technical challenges in safety status monitoring, particularly in hydrogen leak detection and stack health management in low-temperature environments.
[0003] Traditional vehicle status monitoring methods rely primarily on real-time monitoring systems, which continuously collect key parameters such as fuel cell stack voltage, temperature, hydrogen flow, and air flow to analyze the vehicle's operating status in real time. However, this real-time monitoring approach presents the following challenges: First, during extended periods of low-power operation (such as parking or standby), continuous data collection and analysis results in high energy consumption, shortening the vehicle's range. Second, real-time monitoring systems require complex hardware (such as high-frequency sampling sensors and high-performance processors), increasing vehicle manufacturing costs.
[0004] To monitor vehicle status while minimizing power consumption, timed wake-up technology is increasingly being applied to vehicle safety status monitoring. The core concept of timed wake-up technology is to periodically activate the vehicle status monitoring module based on a preset wake-up cycle (i.e., wake-up time), thereby enabling periodic monitoring of the fuel cell vehicle's operating status. Compared to traditional real-time monitoring methods, timed wake-up technology offers significant advantages in terms of energy efficiency and cost-effectiveness. However, current control methods for timed wake-up safety monitoring of vehicle status in fuel cell vehicles are immature, lack consideration for handling failures of the timed wake-up function itself, and thus fail to ensure full functionality. Current controller timed wake-up is typically implemented using an RTC module. RTC modules are susceptible to manufacturing processes, extreme temperatures, humidity, vibration, and power supply stability, posing a risk of failure. Failure rates are expected to increase significantly with mass production. If the RTC module fails, the fuel cell system will be unable to wake up on schedule, preventing timely hydrogen leak detection, purging, or conductivity adjustment. This poses a significant risk of hydrogen leaks and stack damage due to icing. Summary of the Invention
[0005] The purpose of the present invention is to provide a control method, system and vehicle for timed wake-up safety detection of a fuel cell system, so as to regularly wake up the vehicle to perform fuel cell system safety detection and ensure the effectiveness of the vehicle's function of monitoring its own safety status.
[0006] In a first aspect, the present invention provides a method for controlling a fuel cell system timed wake-up safety detection, comprising: Upon receiving a sleep request (i.e., a power-off instruction), the fuel cell system controller reads the wake-up time, the maximum wake-up time threshold, and the timed wake-up purge requirement flag, and sends them to the cloud platform. The system then enters the sleep state, and the cloud platform monitors the sleep duration.
[0007] When the sleep duration reaches the wake-up time and the fuel cell system controller is successfully awakened on time, the fuel cell system controller performs hydrogen leakage detection and high-voltage demand detection. If the vehicle leaks hydrogen or has a high-voltage demand, the vehicle controller is awakened and a hydrogen leakage prompt signal or a high-voltage request signal is sent to the vehicle controller.
[0008] When the sleep duration is greater than or equal to the maximum wake-up time threshold (indicating that the fuel cell system controller has not been successfully awakened until the maximum wake-up time threshold), the cloud platform wakes up the vehicle controller through a network wake-up message, and the vehicle controller then wakes up the fuel cell system controller. The fuel cell system controller performs hydrogen leakage detection and high-voltage demand detection. If the vehicle leaks hydrogen or has a high-voltage demand, a hydrogen leakage prompt signal or a high-voltage request signal is sent to the vehicle controller.
[0009] After receiving the hydrogen leakage warning signal, the vehicle controller sends it (i.e., the hydrogen leakage warning signal) to the cloud platform (to remotely inform the user of the vehicle hydrogen leakage through the user-bound APP or mobile phone text message, and repair it as soon as possible). After receiving the high-voltage request signal, the vehicle controller controls the high voltage of the vehicle, and the fuel cell system performs the corresponding safety functions.
[0010] Preferably, the wakeup time and maximum wakeup time threshold are determined as follows: when not in hibernation, the wakeup interval t1 for hydrogen leak detection, the wakeup interval t2 for purge detection, and the wakeup interval t3 for conductivity adjustment are obtained. The minimum of t1, t2, and t3 is used as the wakeup time, and the maximum of t1, t2, and t3 is used as the maximum wakeup time threshold. By obtaining the wakeup interval required by each of the three critical tasks (hydrogen leak detection, purge detection, and conductivity adjustment) in real time and selecting the minimum as the actual wakeup time, the system is ensured to wake up from hibernation only at the frequency required by the most urgent task (the one with the shortest interval), minimizing unnecessary wakeups and significantly reducing system power consumption when inactive. Furthermore, setting the maximum of the three required intervals as the maximum wakeup time threshold provides a key safety constraint for the system, clearly defining the maximum duration the system can remain in hibernation and establishing a safety mechanism to prevent critical task failures. The combination of the two not only saves energy to the maximum extent, but also strictly ensures the timely execution of all safety detection functions and maintains the reliability and safety of the system.
[0011] Preferably, the wake-up interval t2 for the purge detection requirement is obtained as follows: first, the temperature difference ΔT is calculated using the formula: ΔT=T1-T2; wherein T1 represents the ambient temperature currently collected by the ambient temperature sensor, and T2 represents the coolant temperature at the stack outlet currently collected by the coolant temperature sensor. Then, based on T1 and ΔT, a preset correspondence table of ambient temperature, temperature difference, and wake-up interval for the purge detection requirement is queried to obtain the wake-up interval t2 for the purge detection requirement. By calculating the ambient and coolant temperature difference (ΔT) in real time, combining it with the current ambient temperature (T1), and dynamically querying a preset calibration table, the wake-up interval t2 for the purge detection requirement is accurately determined, thus achieving temperature-adaptive wake-up interval calculation based on actual operating conditions, while taking into account both safety and energy efficiency.
[0012] The wake-up interval time t1 required for hydrogen leakage detection is a preset wake-up interval time that meets the requirements of hydrogen leakage detection regulations.
[0013] The wake-up interval time t3 of the conductivity adjustment requirement is a preset wake-up interval time that meets the conductivity adjustment enterprise standard requirement.
[0014] Preferably, the timed wake-up purge requirement flag is determined by: When the system is not in sleep mode, if the water content of the proton exchange membrane is greater than a preset water content threshold, it is determined that there is a timed wake-up purge requirement, and a timed wake-up purge requirement flag is set.
[0015] When the system is not in sleep mode, if the water content of the proton exchange membrane is less than or equal to a preset water content threshold, it is determined that there is no timed wake-up purge requirement, and the timed wake-up purge requirement flag is reset.
[0016] Preferably, hydrogen leak detection is performed by using hydrogen sensors to detect hydrogen concentrations outside the fuel cell stack, outside the hydrogen bottle, in the passenger compartment, and in the front cabin to determine if the vehicle is leaking hydrogen. If at least one of the hydrogen concentrations detected by the hydrogen sensor, namely, the hydrogen concentration outside the fuel cell stack, the hydrogen concentration outside the hydrogen bottle, the hydrogen concentration in the passenger compartment, or the hydrogen concentration in the front cabin, is greater than a preset concentration threshold, the vehicle is deemed to be leaking hydrogen; otherwise, the vehicle is deemed not to be leaking hydrogen. By monitoring hydrogen concentrations in real time at multiple locations (fuel cell stack, hydrogen bottle, passenger compartment, and front cabin), a hydrogen leak is determined if any location exceeds the threshold, enabling rapid diagnosis of hydrogen leakage risks across the entire vehicle.
[0017] Preferably, the upper high-voltage demand detection includes a purge upper high-voltage demand detection and a conductivity adjustment upper high-voltage demand detection.
[0018] The method for detecting the need for high-voltage purge is to determine whether a high-voltage purge is required based on the current stack outlet coolant temperature and the timed wake-up purge requirement flag. If the current stack outlet coolant temperature is less than the preset temperature threshold and the timed wake-up purge requirement flag is set, a high-voltage purge requirement is determined to exist; otherwise, no high-voltage purge requirement is determined. This dual-condition collaborative determination (stack outlet coolant temperature and timed wake-up purge requirement flag) accurately determines whether a high-voltage purge is required, ensuring necessary maintenance in low-temperature environments.
[0019] The method for detecting the need for high-voltage conductivity adjustment is to determine whether a high-voltage conductivity adjustment is required based on the time of the last conductivity adjustment and the current time. If the difference between the current time and the time of the last conductivity adjustment is greater than or equal to a preset first time threshold, a high-voltage conductivity adjustment requirement is determined to exist; otherwise, a high-voltage conductivity adjustment requirement is determined not to exist. By calculating the conductivity adjustment interval and comparing it with the preset first time threshold, a high-voltage conductivity adjustment operation is triggered as needed, avoiding unnecessary high-voltage adjustments and optimizing energy consumption.
[0020] Preferably, the presence of at least one of a purge high-voltage demand and a conductivity adjustment high-voltage demand indicates an upper high-voltage demand. If the upper high-voltage demand is a purge high-voltage demand (corresponding to a purge high-voltage request signal), the corresponding safety function executed by the fuel cell system is stack purge. If the upper high-voltage demand is a conductivity adjustment high-voltage demand (corresponding to a conductivity adjustment high-voltage request signal), the corresponding safety function executed by the fuel cell system is conductivity adjustment. If the upper high-voltage demand is both a purge high-voltage demand and a conductivity adjustment high-voltage demand, the corresponding safety functions executed by the fuel cell system are stack purge and conductivity adjustment.
[0021] Preferably, the cloud platform compares the timestamp of the last message sent by the fuel cell system controller with the current time. If the difference between the current time and the timestamp is greater than or equal to the maximum wake-up time threshold, it is determined that the sleep duration is greater than or equal to the maximum wake-up time threshold, and the fuel cell system's scheduled wake-up function fails.
[0022] Preferably, after the fuel cell system controller successfully wakes up on time, if the vehicle does not leak hydrogen and has no high-voltage demand, it waits for a preset second time threshold and determines that the timed wake-up safety check has been completed and prepares to sleep.
[0023] Preferably, after receiving the hydrogen leakage prompt signal and sending it to the cloud platform, the vehicle controller requests all controllers to sleep (i.e., sends a sleep request to all controllers).
[0024] Preferably, after the vehicle controller wakes up, if the vehicle does not leak hydrogen and has no high-voltage demand, all controllers are requested to sleep after waiting for a preset third time threshold.
[0025] Preferably, after the fuel cell system has completed executing the corresponding safety function, if there is no need to maintain high pressure, the entire vehicle is controlled to lower high pressure after waiting for a preset third time threshold, and all controllers are requested to sleep.
[0026] In the second aspect, the present invention provides a control system for timed wake-up safety detection of a fuel cell system, which includes a fuel cell system controller, a vehicle controller and a cloud platform. The fuel cell system controller, the vehicle controller and the cloud platform are configured to execute the above-mentioned control method for timed wake-up safety detection of the fuel cell system.
[0027] In a third aspect, the present invention provides a vehicle comprising the above-mentioned fuel cell system timed wake-up safety detection control system.
[0028] The present invention has the following effects: (1) A dual wake-up trigger mechanism was established: scheduled wake-up (conventional path) ensures timely response to high-frequency critical tasks (such as hydrogen leakage) while taking energy saving into consideration; cloud platform forced wake-up (backup path) prevents the long-term dormancy caused by RTC module failure from missing critical long-period tasks (such as conductivity regulation).
[0029] (2) The safety status of the fuel cell system is detected by timed wake-up, and hydrogen leakage is reported, the stack is purged, and the conductivity is adjusted. At the same time, when the timed wake-up function fails, a backup is provided for waking up the vehicle controller using the cloud platform and then waking up the fuel cell system controller. This ensures the timeliness, effectiveness and reliability of the vehicle's function of monitoring its own safety status, and does not require the addition of additional hardware equipment. It is highly feasible and is very necessary for the large-scale popularization of fuel cell vehicles. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 This is a flow chart of a control method for timed wake-up safety detection of a fuel cell system in an embodiment of the present invention.
[0031] Figure 2 This is a flow chart of a method for determining a wake-up time and a maximum wake-up time threshold in an embodiment of the present invention.
[0032] Figure 3 Flowchart for obtaining the wake-up interval time t2 required for purge detection in an embodiment of the present invention. DETAILED DESCRIPTION
[0033] In order to enable a more detailed understanding of the features and technical contents of the embodiments of the present invention, the implementation of the embodiments of the present invention is described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference only and are not intended to limit the embodiments of the present invention.
[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. The terms used herein are for the purpose of describing embodiments of the present invention only and are not intended to limit the present invention.
[0035] In the following description, reference is made to “some embodiments”, which describes a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.
[0036] like Figure 1 As shown, the control method for timed wake-up safety detection of a fuel cell system in an embodiment of the present invention includes the following steps: S1. Determine whether a sleep request (i.e., a power-off instruction) is received. If yes, execute S3; otherwise, execute S2.
[0037] S2. Determine the wake-up time, the maximum wake-up time threshold, and the timed wake-up purge requirement flag, and then return to execute S1.
[0038] In some embodiments, the method for determining the wake-up time and the maximum wake-up time threshold (see Figure 2 )for: First, when the system is not in sleep mode, the wake-up interval t1 for hydrogen leakage detection, the wake-up interval t2 for purge detection, and the wake-up interval t3 for conductivity adjustment are obtained.
[0039] Then, the minimum value among t1, t2, and t3 is used as the wake-up time, and the maximum value among t1, t2, and t3 is used as the maximum wake-up time threshold. The fuel cell system controller stores the latest wake-up time and the maximum wake-up time threshold.
[0040] In some embodiments, the wake-up interval t1 for hydrogen leakage detection is a preset wake-up interval that meets the regulatory requirements for hydrogen leakage detection, and the wake-up interval t3 for conductivity adjustment is a preset wake-up interval that meets the enterprise standard requirements for conductivity adjustment.
[0041] In some embodiments, the wake-up interval t2 of the purge detection requirement is determined by the following method (see Figure 3 )get: First, calculate the temperature difference ΔT using the formula: ΔT = T1 - T2. T1 represents the current ambient temperature measured by the ambient temperature sensor, and T2 represents the current stack outlet coolant temperature measured by the coolant temperature sensor.
[0042] Then, based on T1 and ΔT, the preset correspondence table of ambient temperature, temperature difference, and wake-up interval for purge detection is queried to obtain the wake-up interval t2 for purge detection. As an example, the preset correspondence table of ambient temperature, temperature difference, and wake-up interval for purge detection is determined through preliminary calibration.
[0043] In some embodiments, the timed wake-up purge requirement flag is determined by: When not in sleep mode: If the PEM water content is greater than the preset water content threshold, a timed wake-up purge request is determined, and the timed wake-up purge request flag is set (i.e., to 1). If the PEM water content is less than or equal to the preset water content threshold, a timed wake-up purge request is determined to be non-necessary, and the timed wake-up purge request flag is reset (i.e., to 0). The fuel cell system controller stores the most recent timed wake-up purge request flag. For example, the PEM water content is estimated using stack impedance.
[0044] S3. The fuel cell system controller reads the wake-up time, the maximum wake-up time threshold, and the timed wake-up purge requirement flag, and sends them to the cloud platform. Then, the system enters the sleep state. The cloud platform monitors the sleep duration and then executes S4.
[0045] S4. Determine whether the sleep duration reaches the wake-up time. If yes, execute S5; otherwise, continue to execute S4.
[0046] S5. Determine whether the fuel cell system controller is successfully awakened on time. If so, execute S6; otherwise, execute S10.
[0047] As an example, when the RTC wake-up voltage is detected to be at a high level, it indicates that the fuel cell system controller has been successfully awakened on time.
[0048] S6. Perform hydrogen leakage detection and high-voltage requirement detection, and then execute S7.
[0049] In some embodiments, the method for hydrogen leakage detection is: using a hydrogen sensor to detect the hydrogen concentration outside the fuel cell stack, outside the hydrogen bottle, passenger compartment, and front compartment to determine whether the vehicle is leaking hydrogen.
[0050] In some embodiments, the upper high-voltage requirement detection includes a purge upper high-voltage requirement detection and a conductivity regulation upper high-voltage requirement detection.
[0051] The method for detecting the high voltage demand for purge is to determine whether there is a high voltage demand for purge based on the current coolant temperature at the stack outlet and the timed wake-up purge demand flag.
[0052] The method for detecting the high voltage demand for conductivity adjustment is to determine whether there is a high voltage demand for conductivity adjustment based on the time of the last conductivity adjustment and the current time.
[0053] S7. The fuel cell system controller determines whether the vehicle is leaking hydrogen or has a high-voltage requirement. If so, execute S9; otherwise, execute S8.
[0054] In some embodiments, if at least one of the hydrogen concentrations detected by the hydrogen sensor, namely, the hydrogen concentration outside the fuel cell stack, the hydrogen concentration outside the hydrogen bottle, the hydrogen concentration in the passenger compartment, and the hydrogen concentration in the front compartment, is greater than a preset concentration threshold, the vehicle is determined to be leaking hydrogen; otherwise, the vehicle is determined to be not leaking hydrogen.
[0055] In some embodiments, if the current stack outlet coolant temperature is lower than a preset temperature threshold, and the timed wake-up purge requirement flag is in a set state (i.e., the timed wake-up purge requirement flag is 1), it is determined that there is a high-voltage purge requirement; otherwise, it is determined that there is no high-voltage purge requirement.
[0056] In some embodiments, if the difference between the current time and the time of the last conductivity adjustment is greater than or equal to a preset first time threshold, it is determined that there is a conductivity adjustment high voltage requirement; otherwise, it is determined that there is no conductivity adjustment high voltage requirement.
[0057] The presence of at least one of a purge upper high pressure demand and a conductivity adjustment upper high pressure demand indicates that there is an upper high pressure demand.
[0058] S8: After waiting for a preset second time threshold, it is determined that the scheduled wake-up safety detection has been completed, and the system is ready to sleep, and then ends.
[0059] S9: Wake up the vehicle controller, and then execute S15.
[0060] As an example, the fuel cell system controller sends a CAN message to the vehicle controller, and wakes up the vehicle controller through a specific wake-up frame.
[0061] S10, determining whether the sleep duration is greater than or equal to the maximum wake-up time threshold; if so (indicating that the fuel cell system controller has not been successfully awakened by the maximum wake-up time threshold), executing S11; otherwise, returning to executing S5.
[0062] In some embodiments, the cloud platform compares the timestamp of the last message sent by the fuel cell system controller with the current time. If the difference between the current time and the timestamp is greater than or equal to the maximum wake-up time threshold, it is determined that the sleep duration is greater than or equal to the maximum wake-up time threshold, and the fuel cell system's scheduled wake-up function is invalid.
[0063] S11. The cloud platform wakes up the vehicle controller through a network wake-up message, and then executes S12.
[0064] S12: The vehicle controller wakes up the fuel cell system controller, and then executes S13.
[0065] S13: The fuel cell system controller performs hydrogen leakage detection and high-voltage demand detection, and then executes S14.
[0066] S14. The fuel cell system controller determines whether the vehicle is leaking hydrogen or has a high-voltage requirement. If so, execute S15; otherwise, execute S20.
[0067] S15: Send a hydrogen leakage warning signal or a high voltage request signal to the vehicle controller, and then execute S16.
[0068] As an example, the upper high voltage request signal is a purge upper high voltage request signal, or a conductivity adjustment upper high voltage request signal, or a purge upper high voltage request signal and a conductivity adjustment upper high voltage request signal.
[0069] S16: The vehicle controller determines whether a hydrogen leakage warning signal is received. If so, execute S17; otherwise, execute S18.
[0070] S17: Send a hydrogen leakage warning signal to the cloud platform, and then execute S20. The cloud platform remotely informs the user of the vehicle hydrogen leakage through the user-bound APP and mobile phone text message, and repairs are required as soon as possible.
[0071] S18. The vehicle controller determines whether a purge high-voltage request signal and / or a conductivity adjustment high-voltage request signal is received. If so, execute S19; otherwise, execute S20.
[0072] S19: Control the high voltage on the entire vehicle (powered by the power battery), and the fuel cell system completes the stack purge and / or conductivity adjustment, and then executes S21.
[0073] After receiving the high-voltage purge request signal, the vehicle applies high voltage, and the fuel cell system performs stack purge and completes. After receiving the high-voltage conductivity adjustment request signal, the vehicle applies high voltage, and the fuel cell system performs conductivity adjustment and completes. After receiving the high-voltage purge request signal and the high-voltage conductivity adjustment request signal, the vehicle applies high voltage, and the fuel cell system performs stack purge and conductivity adjustment and completes.
[0074] S20: After waiting for a preset third time threshold, request all controllers to sleep, and then end.
[0075] S21. The vehicle controller determines whether there is a need to maintain high voltage. If yes, it returns to execute S16; otherwise, it executes S22.
[0076] S22: After waiting for a preset third time threshold, control the entire vehicle to lower the high voltage, request all controllers to sleep, and then end.
[0077] In addition, during the entire functional process of the timed wake-up safety detection, if the user unlocks the vehicle at any time, the functional process will be terminated and the user will enter the normal process of using the vehicle. When the user powers off, the process will be restarted from S1.
[0078] In addition, an embodiment of the present invention also provides a control system for timed wake-up safety detection of a fuel cell system, which includes a fuel cell system controller, a vehicle controller and a cloud platform. The fuel cell system controller, the vehicle controller and the cloud platform are configured to execute the above-mentioned control method for timed wake-up safety detection of the fuel cell system.
[0079] In addition, an embodiment of the present invention further provides a vehicle, which includes the above-mentioned fuel cell system timed wake-up safety detection control system.
[0080] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the scope of protection of the present invention.
Claims
1. A control method for timed wake-up safety detection of a fuel cell system, characterized in that: include: Upon receiving a sleep request, the fuel cell system controller reads the wake-up time, maximum wake-up time threshold, and timed wake-up purge requirement flag, and sends them to the cloud platform. The system then enters the sleep state, and the cloud platform monitors the sleep duration. When the sleep duration reaches the wake-up time and the fuel cell system controller is successfully awakened on time, hydrogen leakage detection and high-voltage demand detection are performed. If the vehicle is leaking hydrogen or there is a high-voltage demand, the vehicle controller is awakened and a hydrogen leakage prompt signal or a high-voltage request signal is sent to the vehicle controller; When the sleep duration is greater than or equal to the maximum wake-up time threshold, the cloud platform wakes up the vehicle controller through a network wake-up message, and the vehicle controller then wakes up the fuel cell system controller. The fuel cell system controller performs hydrogen leakage detection and high-voltage demand detection. If the vehicle leaks hydrogen or has a high-voltage demand, it sends a hydrogen leakage prompt signal or a high-voltage request signal to the vehicle controller; After receiving the hydrogen leakage warning signal, the vehicle controller sends it to the cloud platform. After receiving the high-voltage request signal, the vehicle controller controls the high voltage of the vehicle, and the fuel cell system performs the corresponding safety functions.
2. The control method for timed wake-up safety detection of a fuel cell system according to claim 1, characterized in that: The wake-up time and the maximum wake-up time threshold are determined as follows: When not in sleep mode, obtain the wake-up interval t1 for hydrogen leakage detection requirement, the wake-up interval t2 for purge detection requirement, and the wake-up interval t3 for conductivity adjustment requirement, take the minimum value among t1, t2, and t3 as the wake-up time, and take the maximum value among t1, t2, and t3 as the maximum wake-up time threshold.
3. The control method for timed wake-up safety detection of a fuel cell system according to claim 2, characterized in that: The wake-up interval time t2 of the purge detection requirement is obtained as follows: First, calculate the temperature difference △T using the formula: △T=T1-T2; where T1 represents the current ambient temperature collected by the ambient temperature sensor, and T2 represents the current stack outlet coolant temperature collected by the coolant temperature sensor; Then, according to T1 and ΔT, the corresponding relationship table of the preset ambient temperature, temperature difference and the wake-up interval time of the purge detection requirement is searched to obtain the wake-up interval time t2 of the purge detection requirement; The wake-up interval time t1 required for hydrogen leakage detection is a preset wake-up interval time that meets the requirements of hydrogen leakage detection regulations; The wake-up interval time t3 of the conductivity adjustment requirement is a preset wake-up interval time that meets the conductivity adjustment enterprise standard requirement.
4. The control method for timed wake-up safety detection of a fuel cell system according to claim 1, characterized in that: The timed wake-up purge requirement flag is determined by: When not in sleep mode, if the water content of the proton exchange membrane is greater than a preset water content threshold, it is determined that there is a timed wake-up purge requirement, and the timed wake-up purge requirement flag is set; When the system is not in sleep mode, if the water content of the proton exchange membrane is less than or equal to a preset water content threshold, it is determined that there is no timed wake-up purge requirement, and the timed wake-up purge requirement flag is reset.
5. The control method for timed wake-up safety detection of a fuel cell system according to claim 1, characterized in that: The hydrogen leakage detection method is as follows: the hydrogen concentration outside the fuel cell stack, outside the hydrogen bottle, passenger compartment, and front cabin is detected by the hydrogen sensor to determine whether the vehicle is leaking hydrogen; if at least one of the hydrogen concentrations detected by the hydrogen sensor is greater than a preset concentration threshold, the vehicle is determined to be leaking hydrogen; otherwise, the vehicle is determined to be not leaking hydrogen; The upper high-voltage demand detection includes the upper high-voltage demand detection for purge and the upper high-voltage demand detection for conductivity adjustment; The method for detecting the need for high voltage purge is as follows: judging whether there is a need for high voltage purge based on the current coolant temperature at the stack outlet and the timed wake-up purge requirement flag; if the current coolant temperature at the stack outlet is lower than the preset temperature threshold and the timed wake-up purge requirement flag is set, it is determined that there is a need for high voltage purge; otherwise, it is determined that there is no need for high voltage purge; The method for detecting the need for high voltage for conductivity adjustment is as follows: determining whether there is a need for high voltage for conductivity adjustment based on the time of the last conductivity adjustment and the current time; if the difference between the current time and the time of the last conductivity adjustment is greater than or equal to a preset first time threshold, it is determined that there is a need for high voltage for conductivity adjustment; otherwise, it is determined that there is no need for high voltage for conductivity adjustment.
6. The control method for timed wake-up safety detection of a fuel cell system according to claim 5, characterized in that: The presence of at least one of a purge upper high pressure demand and a conductivity adjustment upper high pressure demand indicates that there is an upper high pressure demand; If the upper high-voltage requirement is a purge upper high-voltage requirement, the corresponding safety function performed by the fuel cell system is stack purge; If the upper high-voltage requirement is a conductivity regulation upper high-voltage requirement, the corresponding safety function performed by the fuel cell system is conductivity regulation; If the upper high-voltage requirement is a purge upper high-voltage requirement and a conductivity adjustment upper high-voltage requirement, the corresponding safety functions performed by the fuel cell system are stack purge and conductivity adjustment.
7. The control method for timed wake-up safety detection of a fuel cell system according to any one of claims 1 to 6, characterized in that: The cloud platform compares the timestamp of the last message sent by the fuel cell system controller with the current time. If the difference between the current time and the timestamp is greater than or equal to the maximum wake-up time threshold, it is determined that the sleep duration is greater than or equal to the maximum wake-up time threshold, and the fuel cell system's scheduled wake-up function is invalid.
8. The control method for timed wake-up safety detection of a fuel cell system according to any one of claims 1 to 6, characterized in that: After the fuel cell system controller successfully wakes up on time, if the vehicle does not leak hydrogen and does not require high voltage, it will wait for a preset second time threshold and determine that the safety check for this timed wake-up is complete, and prepare to sleep; After receiving the hydrogen leakage warning signal and sending it to the cloud platform, the vehicle controller requests all controllers to sleep; After the vehicle controller wakes up, if the vehicle does not leak hydrogen and does not require high voltage, it will wait for a preset third time threshold and then request all controllers to sleep; After the fuel cell system has completed the corresponding safety function, if there is no need to maintain high pressure, the system will wait for a preset third time threshold, control the entire vehicle to reduce high pressure, and request all controllers to sleep.
9. A fuel cell system timed wake-up safety detection control system, comprising a fuel cell system controller, a vehicle controller, and a cloud platform, characterized in that: The fuel cell system controller, vehicle controller and cloud platform are configured to execute the control method according to any one of claims 1 to 8.
10. A vehicle, characterized in that: A control system comprising the fuel cell system timed wake-up safety detection as claimed in claim 9.