Vehicle safety control method, system and vehicle

Abstract

The present invention relates to the field of fuel cell technology, and more particularly to a vehicle safety control method, system, and vehicle. When an abnormality occurs in first insulation state information and / or second insulation state information, a first user operation instruction is obtained. When the first operation instruction indicates that the fault is to be resolved, a conduction control valve between the fuel cell cooling system and the power battery cooling system is controlled to open, and the abnormality in the second insulation state information is detected to determine whether the abnormality has been resolved. In this application, the insulation fault of the power battery is resolved through the interaction of coolant between the fuel cell and the power battery, restoring the power battery to a normal state, and realizing interactive conductivity control between the fuel cell and the power battery. This achieves the purpose of preventing faults in advance, delaying faults, and reducing equipment damage, thereby improving the safety and reliability of the vehicle.

Description

Technical Field

[0001] The present invention relates to the field of fuel cell technology, and in particular to a vehicle safety control method, system, and vehicle. Background Art

[0002] Hybrid systems combining fuel cells and lithium-ion batteries are widely used in fuel cell vehicles. However, controlling the coolant conductivity of both batteries is crucial. Excessive coolant conductivity can lead to serious safety issues, such as short circuits and electric shock. However, current research focuses primarily on controlling coolant conductivity and handling insulation failures in individual batteries, while neglecting the handling of insulation failures in hybrid mode. This results in a lack of effective prevention when insulation failures occur in hybrid mode, potentially leading to safety concerns. Therefore, ensuring safe vehicle control in the event of insulation failures in hybrid mode is a pressing issue. Summary of the Invention

[0003] Based on this, it is necessary to provide a vehicle safety control method, system and vehicle to address the above technical issues, so as to solve the safety problems caused by insulation failure in hybrid mode.

[0004] A first aspect of an embodiment of the present application provides a vehicle safety control method, including:

[0005] collecting first insulation state information of the fuel cell cooling system and second insulation state information of the power battery cooling system in real time, and obtaining a first operation instruction from a user when an abnormality occurs in the first insulation state information and / or the second insulation state information;

[0006] When the first operation instruction indicates that a fault has been cleared, controlling the opening of a conduction control valve between the fuel cell cooling system and the power battery cooling system to detect whether the abnormality in the second insulation state information has been cleared;

[0007] If it is detected that the abnormality of the second insulation state information has not been resolved, the vehicle is controlled to restrict travel; if it is detected that the abnormality of the second insulation state information has been resolved, the vehicle is controlled to travel according to the second insulation state information collected in real time.

[0008] A second aspect of an embodiment of the present application provides a vehicle insulation failure safety control system, characterized in that it includes: a fuel cell cooling system, a power battery cooling system, a conduction valve and a controller, the fuel cell cooling system and the power battery cooling system are connected through the conduction valve, the controller connects the fuel cell cooling system, the power battery cooling system and the conduction valve, and the controller is used to execute the vehicle safety control method described in any one of the first aspects.

[0009] A third aspect of an embodiment of the present application provides a vehicle, comprising a vehicle safety control system.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] Real-time collection of first insulation status information of the fuel cell cooling system and second insulation status information of the power battery cooling system. When an abnormality occurs in the first insulation status information and / or the second insulation status information, a first user operation instruction is obtained. When the first operation instruction indicates fault clearance, the conduction control valve between the fuel cell cooling system and the power battery cooling system is controlled to open, and the abnormality in the second insulation status information is detected to be cleared. If it is detected that the abnormality in the second insulation status information has not been cleared, the vehicle is controlled to restrict travel. If it is detected that the abnormality in the second insulation status information has been cleared, the vehicle is controlled to travel according to the real-time collected second insulation status information. In this application, the insulation fault of the power battery is cleared and the power battery is restored to a normal state through the interaction of coolant between the fuel cell and the power battery, thereby achieving interactive conductivity control between the fuel cell and the power battery, achieving the purpose of preventing faults in advance, delaying faults, and reducing equipment damage, thereby improving the safety and reliability of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0013] Figure 1 This is a flow chart of a vehicle safety control method provided in the first embodiment of the present invention;

[0014] Figure 2 This is a flow chart of a vehicle safety control method provided by the second embodiment of the present invention;

[0015] Figure 3 This is a flow chart of a vehicle safety control method provided in a third embodiment of the present invention;

[0016] Figure 4 This is a flow chart of a vehicle safety control method provided by a fourth embodiment of the present invention;

[0017] Figure 5 This is a flow chart of a vehicle safety control method provided in a fifth embodiment of the present invention;

[0018] Figure 6 1 is a flow chart of a vehicle safety control method provided in a sixth embodiment of the present invention;

[0019] Figure 7 This is a flow chart of a vehicle safety control method provided by Embodiment 7 of the present invention;

[0020] Figure 8 This is a schematic structural diagram of a vehicle safety control system provided by a ninth embodiment of the present invention;

[0021] Figure 9 It is a schematic diagram of a vehicle provided in the tenth embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0024] It will also be understood that the term "and / or" used in the present description and appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0025] As used in the present specification and the appended claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0026] In addition, in the description of the present specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0027] References to "one embodiment" or "some embodiments" in the present specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present invention. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0028] It should be understood that the order of execution of the steps in the following embodiments does not necessarily mean the order in which they are executed. The order in which each process is executed should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0029] In order to illustrate the technical solution of the present invention, specific embodiments are provided below.

[0030] See also Figure 1 , is a flow chart of a vehicle safety control method provided by the first embodiment of the present invention, such as Figure 1 As shown, the vehicle safety control method may include the following steps.

[0031] S101: collecting first insulation state information of a fuel cell cooling system and second insulation state information of a power battery cooling system in real time, and obtaining a first operation instruction from a user when an abnormality occurs in the first insulation state information and / or the second insulation state information.

[0032] In step S101, first insulation status information of the fuel cell cooling system and second insulation status information of the power battery cooling system in the vehicle are collected in real time, wherein the first insulation status information includes the insulation resistance of the fuel cell of the fuel cell cooling system, and the second insulation status information includes the insulation resistance of the power battery. Based on the first insulation status information and the second insulation status information, when an abnormality occurs in the first insulation status information and / or the second insulation status information, a first operation instruction of the user is obtained, wherein the first operation instruction is an operation instruction indicating whether to clear the power battery insulation fault.

[0033] In this embodiment, first insulation status information of the fuel cell cooling system and second insulation status information of the power battery cooling system in the vehicle are collected in real time to determine whether there is an abnormality in the first insulation status information and the second insulation status information, that is, whether there is an abnormality in the insulation resistance values ​​in the fuel cell cooling system and the power battery cooling system.

[0034] It should be noted that when the first insulation status information of the fuel cell cooling system and the second insulation status information of the power battery cooling system in the vehicle are collected in real time, the collection is performed by receiving the first insulation status information and the second insulation status information sent by the fuel cell cooling system and the power battery cooling system.

[0035] It should be noted that the abnormality in the first insulation status information may be that the insulation resistance of the fuel cell cooling system is less than a certain threshold, and the abnormality in the second insulation status information may be that the insulation resistance of the power battery cooling system is less than a certain threshold.

[0036] When an abnormality occurs in the first insulation state information and / or the second insulation state information, a first operation instruction of the user is obtained, wherein the first operation instruction is an operation instruction indicating whether to remove the power battery insulation fault.

[0037] S102: When the first operation instruction indicates to remove the fault, control the opening of the conduction control valve between the fuel cell cooling system and the power battery cooling system to detect whether the abnormality in the second insulation state information is removed.

[0038] In step S102, the first operating instruction is to indicate fault removal, that is, to control the vehicle to remove the power battery insulation fault. When the first operating instruction is to indicate fault removal, the conduction control valve between the fuel cell cooling system and the power battery cooling system is controlled to open, so that the coolant in the fuel cell cooling system flows to the power battery cooling system, thereby increasing the insulation resistance of the coolant in the power battery cooling system and achieving the purpose of removing the insulation fault.

[0039] In this embodiment, the fuel cell cooling system and the power battery cooling system are connected via a conduction valve. When the first operating instruction indicates to clear the fault, the conduction control valve between the fuel cell cooling system and the power battery cooling system is controlled to open, so that the coolant of the fuel cell cooling system flows to the power battery cooling system. The coolant of the fuel cell cooling system dilutes the coolant in the power battery cooling system, reducing the conductivity of the coolant in the power battery cooling system, thereby achieving the purpose of clearing the insulation fault.

[0040] After controlling and opening the conduction control valve between the fuel cell cooling system and the power battery cooling system, a detection is made as to whether the abnormality in the second insulation state information has been resolved. Specifically, when detecting whether the abnormality in the second insulation state information has been resolved, an insulation resistance value in the second insulation state information may be detected. For example, if the insulation resistance value in the second insulation state information is greater than a certain threshold, the abnormality in the second insulation state information is considered to have been resolved. Otherwise, the abnormality in the second insulation state information is considered to have not been resolved.

[0041] S103: If it is detected that the abnormality of the second insulation state information has not been resolved, the vehicle is controlled to restrict travel; if it is detected that the abnormality of the second insulation state information has been resolved, the vehicle is controlled to travel according to the second insulation state information collected in real time.

[0042] In step S103, if it is detected that the abnormality in the second insulation state information has not been resolved, that is, the insulation resistance value in the second insulation state information does not meet the requirement, that is, the insulation resistance value in the second insulation state information is less than a certain threshold, the vehicle is controlled to restrict travel while the abnormality in the second insulation state information has not been resolved. If it is detected that the abnormality in the second insulation state information has been resolved, that is, the insulation resistance value in the second insulation state information has also met the requirement, after the abnormality is resolved, the vehicle is controlled to travel based on the first insulation state information and the second insulation state information collected in real time.

[0043] In this embodiment, if it is detected that the abnormality of the second insulation status information has not been resolved, the vehicle is controlled to limit its driving, that is, the vehicle's operating speed and power are limited, and the vehicle's speed and power are limited to a certain range, so that the vehicle can be in a safe state when driving according to the corresponding speed and power.

[0044] If it is detected that the abnormality in the second insulation status information is resolved, the second insulation status information of the power battery cooling system is collected in real time, and the vehicle driving is controlled according to the second insulation status information collected in real time, that is, different control strategies are used to control the vehicle driving according to whether the first insulation status information and the second insulation status information collected in real time are abnormal.

[0045] See also Figure 2 , is a flow chart of a vehicle safety control method provided by the second embodiment of the present invention, such as Figure 2 As shown, after collecting the first insulation state information of the fuel cell cooling system and the second insulation state information of the power battery cooling system in real time, the method further includes:

[0046] S201: When the abnormality in the first insulation state information is a fuel cell insulation fault and the abnormality in the second insulation state information is a power battery insulation fault warning, determining, based on the first insulation state information, a difference between a first insulation resistance value of a fuel cell in a fuel cell cooling system and a preset first threshold value;

[0047] S202: When the first insulation resistance value is greater than a preset first threshold value, controlling to open a conduction control valve between the fuel cell cooling system and the power battery cooling system, and detecting whether the abnormality in the second insulation state information is resolved;

[0048] S203: If it is detected that the abnormality of the second insulation state information has not been resolved, the vehicle is controlled to restrict travel; if it is detected that the abnormality of the second insulation state information has been resolved, the vehicle is controlled to travel according to the second insulation state information collected in real time.

[0049] In this embodiment, after collecting the first insulation status information of the fuel cell cooling system and the second insulation status information of the power battery cooling system in real time, it is determined whether there is any abnormality in the first insulation status information and the second insulation status information based on the corresponding first insulation status information and second insulation status information. When making the judgment, the judgment is made based on the insulation resistance value of the fuel cell in the first insulation status information and the insulation resistance value of the power battery in the second insulation status information.

[0050] For example, if the insulation resistance of the fuel cell in the first insulation status information is less than a first preset resistance and greater than a second preset resistance, the fuel cell cooling system is considered to have a fuel cell insulation fault warning. If the insulation resistance of the power battery in the second insulation status information is less than a third preset resistance and greater than a fourth preset resistance, the power battery cooling system is considered to have a power battery insulation fault warning. If the insulation resistance of the fuel cell in the first insulation status information is not greater than the second preset resistance, the fuel cell cooling system is considered to have a fuel cell insulation fault. If the insulation resistance of the power battery in the second insulation status information is not greater than the fourth preset resistance, the power battery cooling system is considered to have a power battery insulation fault. The first preset resistance is greater than the second preset resistance, and the third preset resistance is greater than the fourth preset resistance.

[0051] It should be noted that, in this embodiment, early warnings for insulation faults include no insulation fault warning, fuel cell insulation fault warning, power battery insulation fault warning, and dual-battery insulation fault warning. If the insulation resistance of the fuel cell in the first insulation status information is not less than a first preset resistance value, and the insulation resistance of the power battery in the second insulation status information is not less than a third preset resistance value, then a no insulation fault warning is determined. If the insulation resistance of the fuel cell in the first insulation status information is less than the first preset resistance value and greater than the second preset resistance value, then a fuel cell insulation fault warning is determined. If the insulation resistance of the power battery in the second insulation status information is less than the third preset resistance value and greater than a fourth preset resistance value, then a power battery insulation fault warning is determined. If the insulation resistance of the fuel cell in the first insulation status information is less than the first preset resistance value and greater than the second preset resistance value, and the insulation resistance of the power battery in the second insulation status information is less than the third preset resistance value and greater than the fourth preset resistance value, then a dual-battery insulation fault warning is determined.

[0052] In the hybrid output mode, if there is no insulation fault warning, that is, the first insulation status information and the second insulation status information are normal, the vehicle is controlled to operate in the hybrid output mode, wherein the hybrid output mode is that the fuel cell and the power battery provide power to the vehicle at the same time.

[0053] In hybrid power output mode, if a fuel cell insulation failure warning occurs (i.e., the fuel cell insulation resistance value in the first insulation status information is less than a first preset resistance value and greater than a second preset resistance value), the display will display a selection of whether to switch to pure electric power output mode. Pure electric power output mode uses the power battery to power the vehicle, and the user selects this mode based on the actual scenario. If the user chooses not to switch to pure electric power output mode, the vehicle's travel is restricted, i.e., the vehicle's operating speed and power are limited to a certain range, ensuring that the vehicle is in a safe state when traveling at the corresponding speed and power.

[0054] The user chooses not to switch to the pure electric power output mode, that is, the vehicle still operates in the hybrid power output mode. If a fuel cell insulation failure occurs, that is, the insulation resistance of the fuel cell is not greater than the second preset resistance, the vehicle is controlled to switch to the pure electric power output mode, that is, the power battery is used to provide power for the vehicle.

[0055] In pure electric power output mode, if a power battery insulation fault warning occurs (i.e., the power battery insulation resistance is less than a third preset resistance value and greater than a fourth preset resistance value), the display will show a choice of whether to stop for repairs. The user can select this option based on the actual scenario. If stopping for repairs is required, the vehicle will be stopped and powered down. If not, the vehicle will be restricted, limiting its speed and power to within a certain range, ensuring that the vehicle is in a safe state while operating at the corresponding speed and power.

[0056] After the vehicle is restricted from driving, if the abnormality in the first insulation status information indicates a fuel cell insulation fault, and the abnormality in the second insulation status information indicates a power battery insulation fault warning, while the vehicle is driving in a pure electric power output mode, the difference between the first insulation resistance of the fuel cell in the fuel cell cooling system and a preset first threshold value is determined based on the first insulation status information, where the preset first threshold value is not greater than the second preset resistance value. When the first insulation resistance value is greater than the preset first threshold value, i.e., when the insulation resistance after the fuel cell insulation fault is greater than the preset first threshold value, the conductance control valve between the fuel cell cooling system and the power battery cooling system is controlled to open, allowing coolant from the fuel cell cooling system to flow to the power battery cooling system. The coolant from the fuel cell cooling system dilutes the coolant in the power battery cooling system, reducing the conductivity of the coolant in the power battery cooling system and thereby resolving the insulation fault.

[0057] After controlling and opening the conduction control valve between the fuel cell cooling system and the power battery cooling system, the vehicle's driving restrictions are lifted, and the abnormality indicated by the second insulation status information is detected to determine whether it has been resolved. The detection of whether the abnormality indicated by the second insulation status information has been resolved may include detecting an insulation resistance value in the second insulation status information. For example, if the insulation resistance value in the second insulation status information is greater than a certain threshold, the abnormality indicated by the second insulation status information is considered to have been resolved. Otherwise, the abnormality indicated by the second insulation status information is considered to have not been resolved.

[0058] If the abnormality detected in the second insulation status information persists, in pure electric power output mode, if a power battery insulation fault warning occurs, the display will show whether to stop the vehicle for repairs. The user can select the option based on the actual scenario. If stopping for repairs is required, the vehicle will be stopped and powered down. If not, the vehicle will be restricted, i.e., the vehicle's operating speed and power will be limited to a certain range so that the vehicle can operate safely at the corresponding speed and power. If a power battery insulation fault occurs after the vehicle is restricted, the vehicle will be stopped and powered down. If the vehicle is restarted, the shutdown process will continue.

[0059] If it is detected that the abnormality of the second insulation state information is resolved, the vehicle is controlled to travel according to the second insulation state information collected in real time.

[0060] See also Figure 3 , is a flow chart of a vehicle safety control method provided by the third embodiment of the present invention, such as Figure 3 As shown, after determining the difference between the first insulation resistance of the fuel cell in the fuel cell cooling system and the preset first threshold, the method further includes:

[0061] S301: When the first insulation resistance value is not greater than a preset first threshold value, controlling the vehicle to limit travel;

[0062] S302: When the abnormality in the second insulation state information is a power battery insulation fault, the control executes the step of obtaining a first operation instruction from the user.

[0063] In this embodiment, when the abnormality in the first insulation status information is a fuel cell insulation failure and the abnormality in the second insulation status information is a power battery insulation failure warning, the vehicle travels in a pure electric power output mode. After judging the difference between the first insulation resistance of the fuel cell in the fuel cell cooling system and the preset first threshold value based on the first insulation status information, when the first insulation resistance is not greater than the preset first threshold value, that is, the insulation resistance of the fuel cell is small, the conduction control valve between the fuel cell cooling system and the power battery cooling system cannot be opened, and the vehicle is controlled to limit its travel, that is, the vehicle's operating speed and power are limited, and the vehicle's speed and power are limited to a certain range, so that the vehicle can be in a safe state when traveling according to the corresponding speed and power.

[0064] If a power battery insulation fault anomaly occurs while the vehicle is traveling in pure electric power output mode, a first user operation instruction is obtained. If the first operation instruction indicates that the fault has been resolved, the control valve between the fuel cell cooling system and the power battery cooling system is controlled to open, and the second insulation status information is detected to determine whether the anomaly has been resolved. If the anomaly is detected to be persistent, the vehicle is restricted from traveling. If the anomaly is detected to be resolved, the vehicle is controlled to travel according to the second insulation status information collected in real time.

[0065] See also Figure 4 , is a flow chart of a vehicle safety control method provided by the fourth embodiment of the present invention, such as Figure 4 As shown, after collecting the first insulation state information of the fuel cell cooling system and the second insulation state information of the power battery cooling system in real time, the method further includes:

[0066] S401: When the abnormality in the second insulation state information is a power battery insulation fault warning, obtaining the amount of fuel in the fuel cell cooling system;

[0067] S402: When the amount of fuel in the fuel cell cooling system is less than a preset threshold, controlling the vehicle to switch to a pure electric power output mode, opening a conduction control valve between the fuel cell cooling system and the power battery cooling system, and detecting whether the abnormality in the second insulation state information has been resolved;

[0068] S403: If it is detected that the abnormality of the second insulation state information has not been resolved, the vehicle is controlled to restrict travel; if it is detected that the abnormality of the second insulation state information has been resolved, the vehicle is controlled to travel according to the second insulation state information collected in real time.

[0069] In this embodiment, the abnormality in the second insulation status information is a power battery insulation fault warning. When there is no abnormality in the second insulation status information, the amount of fuel in the fuel cell cooling system is obtained. When the amount of fuel in the fuel cell cooling system is less than a preset threshold, that is, the amount of fuel is small and cannot meet the requirement of providing power for the vehicle, the vehicle is controlled to enter the pure electric power output mode. In the pure electric power output mode, the vehicle is controlled to limit driving, and the conduction control valve between the fuel cell cooling system and the power battery cooling system is opened to allow the coolant of the fuel cell cooling system to flow to the power battery cooling system. The coolant of the fuel cell cooling system dilutes the coolant in the power battery cooling system, reduces the conductivity of the coolant in the power battery cooling system, and ensures that the pure electric power output mode can operate normally.

[0070] After opening the conduction control valve between the fuel cell cooling system and the power battery cooling system, the fuel stack in the fuel cell cooling system is closed, and the restrictions on vehicle driving are lifted, the vehicle's driving speed and power can be restored. In pure electric power output mode, if a power battery insulation fault warning appears, the display will show an option to stop for repairs. The user can select it according to the actual scenario. If stopping for repairs, the vehicle will be stopped and powered off. If not stopping for repairs, the vehicle's driving will be restricted, that is, the vehicle's operating speed and power will be limited to a certain range, so that the vehicle can be in a safe state when driving according to the corresponding speed and power.

[0071] See also Figure 5 , is a flow chart of a vehicle safety control method provided by Embodiment 5 of the present invention, such as Figure 5 As shown, after collecting the first insulation state information of the fuel cell cooling system and the second insulation state information of the power battery cooling system in real time, the method further includes:

[0072] S501: When the abnormality in the first insulation state information is a fuel cell insulation fault warning and the abnormality in the second insulation state information is a power battery insulation fault warning, obtaining the amount of fuel in the fuel cell cooling system;

[0073] S502: When the amount of fuel in the fuel cell cooling system is less than a preset threshold, controlling the vehicle to switch into a pure electric power output mode and controlling the vehicle to restrict driving;

[0074] S503: In the pure electric power output mode, determining, based on the first insulation state information, a difference between a first insulation resistance value of a fuel cell in the fuel cell cooling system and a preset first threshold value;

[0075] S504: When the first insulation resistance value is greater than a preset first threshold value, controlling to open a conduction control valve between the fuel cell cooling system and the power battery cooling system, and detecting whether the abnormality in the second insulation state information is resolved;

[0076] S505: If it is detected that the abnormality of the second insulation state information has not been resolved, the vehicle is controlled to restrict travel; if it is detected that the abnormality of the second insulation state information has been resolved, the vehicle is controlled to travel according to the second insulation state information collected in real time.

[0077] In this embodiment, when the abnormality in the first insulation status information is a fuel cell insulation fault warning, and the abnormality in the second insulation status information is a power battery insulation fault warning, that is, a dual battery warning, the amount of fuel in the fuel cell cooling system is obtained. When the amount of fuel in the fuel cell cooling system is less than a preset threshold, the vehicle is controlled to switch to a pure electric power output mode, and the vehicle is controlled to restrict driving.

[0078] In the pure electric power output mode, after the vehicle is restricted from traveling, the first insulation state information is used to determine the difference between a first insulation resistance of the fuel cell in the fuel cell cooling system and a preset first threshold, where the preset first threshold is not greater than a second preset resistance. When the first insulation resistance is greater than the preset first threshold, i.e., when the insulation resistance of the fuel cell after an insulation fault is greater than the preset first threshold, the conductance control valve between the fuel cell cooling system and the power battery cooling system is controlled to open, allowing coolant from the fuel cell cooling system to flow to the power battery cooling system. The coolant from the fuel cell cooling system dilutes the coolant in the power battery cooling system, reducing the conductivity of the coolant in the power battery cooling system and thereby resolving the insulation fault.

[0079] After controlling and opening the conduction control valve between the fuel cell cooling system and the power battery cooling system, the vehicle's driving restrictions are lifted, and the abnormality indicated by the second insulation status information is detected to determine whether it has been resolved. The detection of whether the abnormality indicated by the second insulation status information has been resolved may include detecting an insulation resistance value in the second insulation status information. For example, if the insulation resistance value in the second insulation status information is greater than a certain threshold, the abnormality indicated by the second insulation status information is considered to have been resolved. Otherwise, the abnormality indicated by the second insulation status information is considered to have not been resolved.

[0080] If it is detected that the abnormality of the second insulation status information has not been resolved, in the pure electric power output mode, if a power battery insulation fault warning occurs, the display will show the option of whether to stop for maintenance. The user will make a choice based on the actual scenario. If the vehicle is stopped for maintenance, the vehicle will be stopped and powered off. If the vehicle is not stopped for maintenance, the vehicle will be controlled to limit its travel, that is, the vehicle's operating speed and power will be limited to a certain range, so that the vehicle can be in a safe state when traveling according to the corresponding speed and power. If a power battery insulation fault occurs after the vehicle is controlled to limit its travel, the vehicle will be stopped and powered off. If the vehicle is started again, the shutdown will continue. If it is detected that the abnormality of the second insulation status information has been resolved, the vehicle will be controlled to travel according to the second insulation status information collected in real time.

[0081] In the pure electric power output mode, the vehicle is controlled to limit its travel. After judging the size of the first insulation resistance of the fuel cell in the fuel cell cooling system and the preset first threshold value based on the first insulation state information, when the first insulation resistance is not greater than the preset first threshold value, that is, the insulation resistance of the fuel cell is small, the conduction control valve between the fuel cell cooling system and the power battery cooling system cannot be opened, and the vehicle is controlled to limit its travel, that is, the vehicle's operating speed and power are limited to a certain range, so that the vehicle can be in a safe state when traveling according to the corresponding speed and power.

[0082] If a power battery insulation fault anomaly occurs while the vehicle is traveling in pure electric power output mode, a first user operation instruction is obtained. If the first operation instruction indicates that the fault has been resolved, the control valve between the fuel cell cooling system and the power battery cooling system is controlled to open, and the second insulation status information is detected to determine whether the anomaly has been resolved. If the anomaly is detected to be persistent, the vehicle is restricted from traveling. If the anomaly is detected to be resolved, the vehicle is controlled to travel according to the second insulation status information collected in real time.

[0083] Optionally, after collecting the first insulation state information of the fuel cell cooling system and the second insulation state information of the power battery cooling system in real time, the method further includes:

[0084] When the first insulation state information and the second insulation state information are normal, the vehicle is controlled to travel in a hybrid power output mode.

[0085] In this embodiment, in the hybrid power output mode, if the first insulation state information and the second insulation state information are normal, that is, the fuel cell cooling system and the power battery cooling system are normal, the vehicle is controlled to operate in the hybrid power output mode, wherein the hybrid power output mode is that the fuel cell and the power battery simultaneously provide power to the vehicle.

[0086] See also Figure 6 , is a flow chart of a vehicle safety control method provided by Embodiment 6 of the present invention, such as Figure 7 As shown, after collecting the first insulation state information of the fuel cell cooling system and the second insulation state information of the power battery cooling system in real time, the method further includes:

[0087] S601: When the abnormality in the first insulation state information is a fuel cell insulation fault warning, and the abnormality in the second insulation state information is a power battery insulation fault warning, obtaining a second operation instruction from the user;

[0088] S602: When the second operation instruction is not to switch out of the hybrid power output mode, controlling the vehicle to limit travel;

[0089] S603: When the abnormality in the second insulation state information is a power battery insulation fault, controlling the vehicle to switch to a fuel cell power output mode or an electric power output mode, and obtaining a first operation instruction from the user;

[0090] S604: When the first operation instruction indicates that the fault has been cleared, control the opening of the conduction control valve between the fuel cell cooling system and the power battery cooling system to detect whether the abnormality in the second insulation state information has been cleared;

[0091] S605: If it is detected that the abnormality of the second insulation state information has not been resolved, the vehicle is controlled to restrict travel; if it is detected that the abnormality of the second insulation state information has been resolved, the vehicle is controlled to travel according to the second insulation state information collected in real time.

[0092] In this embodiment, when the abnormality in the first insulation status information is a fuel cell insulation fault warning, and the abnormality in the second insulation status information is a power battery insulation fault warning, that is, a dual-electric warning, a choice of whether to stop the vehicle and power off appears on the display. If the user chooses not to stop the vehicle and power off, that is, the user's second operation instruction is to power off without stopping the vehicle, the vehicle is controlled to limit its driving, that is, the vehicle's operating speed and power are limited to a certain range, so that the vehicle can be in a safe state when driving according to the corresponding speed and power.

[0093] After the vehicle is restricted from driving, it continues to drive in hybrid power output mode. When the abnormality in the second insulation state information is a power battery insulation fault, the vehicle is controlled to switch to fuel cell power output mode. The display shows whether to stop for maintenance. The user selects according to the actual scenario. If the vehicle stops for maintenance, the vehicle is stopped and powered off. If the vehicle does not stop for maintenance, the vehicle is controlled to restrict driving. In the fuel cell power output mode, the fuel cell cooling system of the vehicle is tested for insulation faults. If the fuel cell cooling system has a fuel cell insulation fault, the user's first operation instruction is obtained. When the first operation instruction indicates to remove the fault, the conduction control valve between the fuel cell cooling system and the power battery cooling system is controlled to open to detect whether the abnormality in the second insulation state information has been removed. If it is detected that the abnormality in the second insulation state information has not been removed, the vehicle is controlled to restrict driving. If it is detected that the abnormality in the second insulation state information has been removed, the vehicle is controlled to drive according to the second insulation state information collected in real time.

[0094] It should be noted that when it is detected that the abnormality of the second insulation status information has not been resolved, if the abnormality of the second insulation status information is a power battery insulation failure, the vehicle will be stopped and powered off. If the vehicle is started again, the parking and power-off will continue.

[0095] See also Figure 7 , is a flow chart of a vehicle safety control method provided by Embodiment 7 of the present invention, such as Figure 7 As shown, when the second operation instruction is not to switch out of the hybrid power output mode, after controlling the vehicle to limit running, the method further includes:

[0096] S701: When the abnormality in the first insulation status information is a fuel cell insulation fault, controlling the vehicle to switch to a pure electric power output mode, and determining, based on the first insulation status information, a difference between a first insulation resistance value of a fuel cell in a fuel cell cooling system and a preset first threshold value;

[0097] S702: When the first insulation resistance value is greater than a preset first threshold value, controlling to open a conduction control valve between the fuel cell cooling system and the power battery cooling system, and detecting whether the abnormality in the second insulation state information is resolved;

[0098] S703: If it is detected that the abnormality of the second insulation state information has not been resolved, the vehicle is controlled to restrict travel; if it is detected that the abnormality of the second insulation state information has been resolved, the vehicle is controlled to travel according to the second insulation state information collected in real time.

[0099] In this embodiment, when the second operating instruction is not to switch out of the hybrid power output mode, after the vehicle is controlled to restrict driving, when the abnormality in the first insulation status information is a fuel cell insulation failure, the vehicle is controlled to switch into the pure electric power output mode. When there is an insulation fault warning in the power battery, the first insulation resistance of the fuel cell in the fuel cell cooling system is judged based on the first insulation status information. When the first insulation resistance is greater than the preset first threshold, that is, the insulation resistance after the fuel cell insulation failure is greater than the preset first threshold, the conduction control valve between the fuel cell cooling system and the power battery cooling system is controlled to open, so that the coolant of the fuel cell cooling system flows to the power battery cooling system. The coolant of the fuel cell cooling system dilutes the coolant in the power battery cooling system, reduces the conductivity of the coolant in the power battery cooling system, and achieves the purpose of eliminating the insulation fault.

[0100] After controlling and opening the conduction control valve between the fuel cell cooling system and the power battery cooling system, the restricted driving of the vehicle is cancelled, and it is detected whether the abnormality of the second insulation state information is lifted, that is, whether the power battery insulation fault warning is lifted. If it is detected that the abnormality of the second insulation state information is not lifted, in the pure electric power output mode, the display will show whether to stop for maintenance. The user selects according to the actual scenario. If the vehicle is stopped for maintenance, the vehicle is stopped and powered off. If the vehicle is not stopped for maintenance, the vehicle is controlled to be restricted, that is, the vehicle's operating speed and power are limited to a certain range, so that the vehicle can be in a safe state when driving according to the corresponding speed and power. If a power battery insulation fault occurs after the vehicle is controlled to be restricted, the vehicle is stopped and powered off. If the vehicle is started again, the parking and power-off execution will continue. If it is detected that the abnormality of the second insulation state information is lifted, the vehicle is controlled to drive according to the second insulation state information collected in real time.

[0101] After the vehicle is controlled to enter the pure electric power output mode, when the first insulation resistance is not greater than the preset first threshold value, that is, the insulation resistance of the fuel cell is small, the conduction control valve between the fuel cell cooling system and the power battery cooling system cannot be opened, and the vehicle is controlled to limit its driving, that is, to limit the vehicle's operating speed and power, and limit the vehicle's speed and power to a certain range, so that the vehicle can be in a safe state when driving according to the corresponding speed and power.

[0102] If a power battery insulation fault anomaly occurs while the vehicle is traveling in pure electric power output mode, a first user operation instruction is obtained. If the first operation instruction indicates that the fault has been resolved, the control valve between the fuel cell cooling system and the power battery cooling system is controlled to open, and the second insulation status information is detected to determine whether the anomaly has been resolved. If the anomaly is detected to be persistent, the vehicle is restricted from traveling. If the anomaly is detected to be resolved, the vehicle is controlled to travel according to the second insulation status information collected in real time.

[0103] It should be noted that when it is detected that the abnormality of the second insulation status information has not been resolved, if the abnormality of the second insulation status information is a power battery insulation failure, the vehicle will be stopped and powered off. If the vehicle is started again, the parking and power-off will continue.

[0104] Real-time collection of first insulation status information of the fuel cell cooling system and second insulation status information of the power battery cooling system. When an abnormality occurs in the first insulation status information and / or the second insulation status information, a first user operation instruction is obtained. When the first operation instruction indicates fault clearance, the conduction control valve between the fuel cell cooling system and the power battery cooling system is controlled to open, and the abnormality in the second insulation status information is detected to be cleared. If it is detected that the abnormality in the second insulation status information has not been cleared, the vehicle is controlled to restrict travel. If it is detected that the abnormality in the second insulation status information has been cleared, the vehicle is controlled to travel according to the real-time collected second insulation status information. In this application, the insulation fault of the power battery is cleared and the power battery is restored to a normal state through the interaction of coolant between the fuel cell and the power battery, thereby achieving interactive conductivity control between the fuel cell and the power battery, achieving the purpose of preventing faults in advance, delaying faults, and reducing equipment damage, thereby improving the safety and reliability of the vehicle.

[0105] See also Figure 8 , is a schematic diagram of the structure of a vehicle safety control system 80 provided by the ninth embodiment of the present invention, such as Figure 8 As shown, the vehicle safety control system 80 includes a fuel cell cooling system 81, a power battery cooling system 82, a conduction valve 83 and a vehicle controller 84. The fuel cell cooling system 81 and the power battery cooling system 82 are connected through the conduction valve 83. The controller connects the fuel cell cooling system 81, the power battery cooling system 82 and the conduction valve 83. The vehicle controller 84 is used to execute the above-mentioned vehicle safety control method.

[0106] In this embodiment, the fuel cell cooling system 81 and the power battery cooling system 82 detect the insulation status information of the corresponding batteries within a preset interval time period, and send the corresponding insulation status information to the vehicle controller 84, which controls the real-time acquisition of the first insulation status information of the fuel cell cooling system 81 and the second insulation status information of the power battery cooling system 82. Based on the first insulation status information and the second insulation status information, it is determined whether the first insulation status information and the second insulation status information are abnormal.

[0107] It should be noted that the fuel cell cooling system 81 and the power battery cooling system 82 send corresponding signals as insulation status information to the vehicle controller 84. Based on the received signals, the vehicle controller 84 determines whether the first insulation status information and the second insulation status information are abnormal. The fuel cell insulation status signal includes a "0" signal indicating no fuel cell abnormality, a "1" signal indicating a fuel cell insulation fault warning, and a "2" signal indicating a fuel cell insulation fault. The fuel cell insulation fault status signal includes a "0" signal indicating no fuel cell insulation fault and a "1" signal indicating a fuel cell insulation fault.

[0108] The power battery cooling system 82 sends a power battery insulation status signal and a power battery insulation fault status signal to the vehicle controller 84. The power battery insulation status signal includes a power battery normal abnormality signal "0", a power battery insulation fault warning signal "1", and a power battery insulation fault signal "2". The power battery insulation fault status signal includes a power battery no insulation fault signal "0" and a power battery insulation fault signal "1".

[0109] The vehicle controller 84 determines whether the first insulation status information and the second insulation status information are abnormal based on the received signals, the first insulation status information, and the second insulation status information. Abnormalities include the vehicle insulation status and the vehicle insulation fault status. Signals corresponding to the vehicle insulation status include a signal "00" indicating no abnormality in the vehicle insulation status, a signal "11" indicating a fuel cell insulation fault warning in the fuel power output mode, a signal "12" indicating a power battery insulation fault warning in the pure electric power output mode, a signal "13" indicating a fuel cell insulation fault warning in the hybrid power output mode, a signal "14" indicating a power battery insulation fault warning in the hybrid power output mode, a signal "15" indicating a simultaneous fuel cell and power battery insulation fault warning in the hybrid power output mode, a signal "21" indicating a fuel cell insulation fault in the fuel power output mode, a signal "22" indicating a power battery insulation fault in the pure electric power output mode, a signal "23" indicating a fuel cell insulation fault in the hybrid power output mode, a signal "24" indicating a power battery insulation fault in the hybrid power output mode, and a signal "25" indicating a dual battery insulation fault in the hybrid power output mode. Vehicle insulation fault status signals include a signal "0" indicating no insulation fault, a signal "1" indicating a fuel cell insulation fault warning, a signal "2" indicating a power battery insulation fault, and a signal "3" indicating a dual battery insulation fault.

[0110] The vehicle's safety control system also includes an instrument display, which is used for user interaction. The instrument display prompt signals include an instrument display no prompt signal "0x0", a fuel cell insulation fault warning, whether to switch to the pure electric power output mode signal "0x1", a power battery insulation fault warning, whether to switch to the fuel power output mode signal "0x2", a fuel cell insulation fault warning, whether to stop for maintenance signal "0x3", a power battery insulation fault warning, whether to stop for maintenance signal "0x4", a dual battery insulation fault warning, whether to stop and power off signal "0x5", a fuel cell insulation fault, switch to the pure electric power output mode signal "1x1", a power battery insulation fault, switch to the fuel power output mode signal "1x2", a fuel cell insulation fault, stop and power off signal "1x3", a power battery insulation fault, stop and power off signal "1x4", a dual battery insulation fault, stop and power off signal "1x5", whether to switch to the pure electric power output mode signal "2x1", whether to switch to the fuel power output mode signal "2x2", a failure signal to switch to the pure electric power output mode "2x3", and a failure signal to switch to the fuel power output mode "2x4".

[0111] It should be noted that the instrument display includes corresponding prompt lights, which provide prompts based on corresponding prompt signals. For example, if there is no insulation fault, the corresponding prompt signal is "0" and the prompt light is off. For insulation fault warning, the corresponding prompt signal is "1" and the prompt light is yellow. For insulation fault, the corresponding prompt signal is "2" and the prompt light is red.

[0112] When controlling the corresponding mode, the vehicle controller 84 uses the corresponding mode signal to indicate the switch in and out. For example, the hybrid power output mode activation signal includes the hybrid power output mode activation signal being "0" and the hybrid power output mode activation signal being "1." The fuel power output mode activation signal includes the fuel cell deactivation signal being "0" and the fuel cell activation signal being "1." The pure electric power output mode activation signal includes the power battery deactivation signal being "0" and the power battery activation signal being "1."

[0113] During the restricted vehicle operation process, the restricted vehicle operation signal includes a "0" signal indicating no need to reduce the vehicle's speed and power, and a "1" signal indicating reduced speed and power. The corresponding signals during the parking and power-off process include a start-up signal and a stop-down signal, with the start-up signal being "0" and the stop-down signal being "1." The corresponding signals during the startup and power-on process include a stop-down signal and a start-up signal, with the stop-down signal being "0" and the start-up signal being "1."

[0114] When the vehicle controller 84 controls the conduction valve to be turned on and off, it is turned on and off according to the corresponding conduction and closing, wherein the conduction signal can be a signal "1" and the closing signal can be a signal "0".

[0115] See also Figure 9 , is a structural diagram of a vehicle 90 provided in a tenth embodiment of the present invention, wherein the vehicle 90 includes a vehicle safety control system 80.

Claims

1. A vehicle safety control method, characterized in that: include: collecting first insulation state information of the fuel cell cooling system and second insulation state information of the power battery cooling system in real time, and obtaining a first operation instruction from a user when an abnormality occurs in the first insulation state information and / or the second insulation state information; When the first operation instruction indicates that a fault has been cleared, controlling the opening of a conduction control valve between the fuel cell cooling system and the power battery cooling system to detect whether the abnormality in the second insulation state information has been cleared; If it is detected that the abnormality of the second insulation state information has not been resolved, the vehicle is controlled to be restricted from traveling; if it is detected that the abnormality of the second insulation state information has been resolved, the vehicle is controlled to travel according to the second insulation state information collected in real time; After the real-time acquisition of the first insulation status information of the fuel cell cooling system and the second insulation status information of the power battery cooling system, the method further includes: When the abnormality in the first insulation state information is a fuel cell insulation fault warning, and the abnormality in the second insulation state information is a power battery insulation fault warning, obtaining a second operation instruction from the user; When the second operation instruction is not to switch out of the hybrid power output mode, controlling the vehicle to limit running; When the abnormality in the second insulation state information is a power battery insulation fault, controlling the vehicle to enter a fuel cell power output mode and obtaining a first operation instruction from a user; When the first operation instruction indicates that a fault has been cleared, controlling the opening of a conduction control valve between the fuel cell cooling system and the power battery cooling system to detect whether the abnormality in the second insulation state information has been cleared; If it is detected that the abnormality of the second insulation state information has not been resolved, the vehicle is controlled to restrict travel; if it is detected that the abnormality of the second insulation state information has been resolved, the vehicle is controlled to travel according to the second insulation state information collected in real time.

2. The vehicle safety control method according to claim 1, wherein: After the real-time acquisition of the first insulation status information of the fuel cell cooling system and the second insulation status information of the power battery cooling system, the method further includes: When the abnormality in the first insulation state information is a fuel cell insulation fault and the abnormality in the second insulation state information is a power battery insulation fault warning, determining, based on the first insulation state information, a difference between a first insulation resistance value of a fuel cell in the fuel cell cooling system and a preset first threshold value; When the first insulation resistance is greater than a preset first threshold, controlling to open a conduction control valve between the fuel cell cooling system and the power battery cooling system, and detecting whether the abnormality in the second insulation state information is resolved; If it is detected that the abnormality of the second insulation state information has not been resolved, the vehicle is controlled to restrict travel; if it is detected that the abnormality of the second insulation state information has been resolved, the vehicle is controlled to travel according to the second insulation state information collected in real time.

3. The vehicle safety control method according to claim 2, characterized in that: After determining the difference between the first insulation resistance of the fuel cell in the fuel cell cooling system and the preset first threshold, the method further includes: When the first insulation resistance is not greater than a preset first threshold, controlling the vehicle to limit travel; When the abnormality occurring in the second insulation state information is a power battery insulation fault, the control executes the step of obtaining a first operation instruction from the user.

4. The vehicle safety control method according to claim 1, wherein: After the real-time acquisition of the first insulation status information of the fuel cell cooling system and the second insulation status information of the power battery cooling system, the method further includes: When the abnormality in the second insulation state information is a power battery insulation fault warning, obtaining the amount of fuel in the fuel cell cooling system; When the amount of fuel in the fuel cell cooling system is less than a preset threshold, controlling the vehicle to enter a pure electric power output mode, opening a conduction control valve between the fuel cell cooling system and the power battery cooling system, and detecting whether the abnormality in the second insulation state information is resolved; If it is detected that the abnormality of the second insulation state information has not been resolved, the vehicle is controlled to restrict travel; if it is detected that the abnormality of the second insulation state information has been resolved, the vehicle is controlled to travel according to the second insulation state information collected in real time.

5. The vehicle safety control method according to claim 4, characterized in that: After the real-time acquisition of the first insulation status information of the fuel cell cooling system and the second insulation status information of the power battery cooling system, the method further includes: When the abnormality in the first insulation state information is a fuel cell insulation fault warning, and the abnormality in the second insulation state information is a power battery insulation fault warning, obtaining the amount of fuel in the fuel cell cooling system; When the amount of fuel in the fuel cell cooling system is less than the preset threshold, controlling the vehicle to switch into a pure electric power output mode and controlling the vehicle to limit driving; In the pure electric power output mode, determining, based on the first insulation state information, whether a first insulation resistance of a fuel cell in a fuel cell cooling system is greater than a preset first threshold; When the first insulation resistance is greater than a preset first threshold, controlling to open a conduction control valve between the fuel cell cooling system and the power battery cooling system, and detecting whether the abnormality in the second insulation state information is resolved; If it is detected that the abnormality of the second insulation state information has not been resolved, the vehicle is controlled to restrict travel; if it is detected that the abnormality of the second insulation state information has been resolved, the vehicle is controlled to travel according to the second insulation state information collected in real time.

6. The vehicle safety control method according to claim 1, wherein: After the real-time acquisition of the first insulation status information of the fuel cell cooling system and the second insulation status information of the power battery cooling system, the method further includes: When the first insulation state information and the second insulation state information indicate that there is no abnormality, the vehicle is controlled to travel in a hybrid power output mode.

7. The vehicle safety control method according to claim 1, wherein: After controlling the vehicle to limit running when the second operation instruction is not to switch out of the hybrid power output mode, the method further includes: When the abnormality in the first insulation state information is a fuel cell insulation fault, controlling the vehicle to switch to a pure electric power output mode, and determining, based on the first insulation state information, a difference between a first insulation resistance value of a fuel cell in a fuel cell cooling system and a preset first threshold value; When the first insulation resistance is greater than a preset first threshold, controlling to open a conduction control valve between the fuel cell cooling system and the power battery cooling system, and detecting whether the abnormality in the second insulation state information is resolved; If it is detected that the abnormality of the second insulation state information has not been resolved, the vehicle is controlled to restrict travel; if it is detected that the abnormality of the second insulation state information has been resolved, the vehicle is controlled to travel according to the second insulation state information collected in real time.

8. A safety control system for vehicle insulation failure, characterized in that: include: A fuel cell cooling system, a power battery cooling system, a conduction valve and a controller, wherein the fuel cell cooling system is connected to the power battery cooling system via the conduction valve, the controller connects the fuel cell cooling system, the power battery cooling system and the conduction valve, and the controller is used to execute the vehicle safety control method described in any one of claims 1 to 7.

9. A vehicle, characterized in that: The vehicle includes the vehicle insulation failure safety control system according to claim 8.

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