Vehicle safety control method, system and vehicle

Abstract

The present invention relates to the field of fuel cell technology, and in particular to a vehicle safety control method, system, and vehicle. First insulation status information of a fuel cell cooling system and second insulation status information of a power battery cooling system in a vehicle are collected in real time. Based on the first insulation status information and the second insulation status information, insulation fault detection is performed on the vehicle, and the insulation fault detection result is determined. Based on the insulation fault detection result, an insulation fault processing strategy that matches the insulation fault detection result is controlled and executed. In the present application, when an insulation fault warning is detected in the vehicle, the power source causing the insulation fault is determined, and different processing strategies are executed to prevent the failure according to different power sources causing the insulation fault, 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 power batteries are widely used in fuel cell vehicles. However, controlling the coolant conductivity of both types of 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 faults in individual batteries, while neglecting the handling of insulation faults in hybrid mode. This results in a lack of effective prevention of insulation faults in hybrid mode, potentially leading to safety concerns. Therefore, ensuring safe vehicle control in the event of insulation faults 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 a fuel cell cooling system and second insulation state information of a power battery cooling system in a vehicle in real time, performing insulation fault detection on the vehicle based on the first insulation state information and the second insulation state information, and determining a detection result of the insulation fault;

[0006] According to the detection result of the insulation fault, control is performed to execute an insulation fault processing strategy that matches the detection result of the insulation fault.

[0007] A second aspect of an embodiment of the present application provides a vehicle safety control system, comprising: a fuel cell cooling system, a power battery cooling system and a vehicle controller, wherein the vehicle controller is connected to the fuel cell cooling system and the power battery cooling system, and the vehicle controller is used to execute the vehicle safety control method described in any one of the first aspects of claim 1.

[0008] A third aspect of an embodiment of the present application provides a vehicle, comprising a vehicle safety control system.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] Real-time collection of first insulation status information from the fuel cell cooling system and second insulation status information from the power battery cooling system in the vehicle. Based on the first and second insulation status information, insulation fault detection is performed on the vehicle, and the insulation fault detection result is determined. Based on the insulation fault detection result, execution of an insulation fault handling strategy that matches the insulation fault detection result is controlled. In this application, when an insulation fault warning is detected in the vehicle, the power source causing the insulation fault is determined, and different handling strategies are implemented to prevent the insulation fault based on the different power sources causing the insulation fault, thereby improving the safety and reliability of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] 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.

[0012] Figure 1 This is a flow chart of a vehicle safety control method provided in the first embodiment of the present invention;

[0013] Figure 2 This is a flow chart of a vehicle safety control method provided by the second embodiment of the present invention;

[0014] Figure 3 This is a flow chart of a vehicle safety control method provided in a third embodiment of the present invention;

[0015] Figure 4 This is a flow chart of a vehicle safety control method provided by a fourth embodiment of the present invention;

[0016] Figure 5 This is a flow chart of a vehicle safety control method provided in a fifth embodiment of the present invention;

[0017] Figure 6 1 is a flow chart of a vehicle safety control method provided in a sixth embodiment of the present invention;

[0018] Figure 7 This is a flow chart of a vehicle safety control method provided by Embodiment 7 of the present invention;

[0019] Figure 8 This is a schematic structural diagram of a vehicle safety control system provided by Embodiment 8 of the present invention;

[0020] Figure 9 This is a schematic diagram of a vehicle provided in Example 9 of the present invention. DETAILED DESCRIPTION

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] In order to illustrate the technical solution of the present invention, specific embodiments are provided below.

[0029] 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.

[0030] S101: collecting first insulation status information of a fuel cell cooling system and second insulation status information of a power battery cooling system in a vehicle in real time, performing insulation fault detection on the vehicle based on the first insulation status information and the second insulation status information, and determining a detection result of the insulation fault.

[0031] 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, insulation fault detection is performed on the vehicle to determine the detection result of the insulation fault, wherein the detection result of the insulation fault includes an early warning of the insulation fault and the corresponding insulation fault, and the early warning of the insulation fault includes no insulation fault warning, fuel cell insulation fault warning, power battery insulation fault warning, and dual battery insulation fault warning, and the insulation fault includes a fuel cell insulation fault warning and a power battery insulation fault warning.

[0032] 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, and insulation fault detection is performed on the vehicle based on the first insulation status information and the second insulation status information. The insulation fault detection result can be determined based on the insulation resistance value.

[0033] In this embodiment, corresponding judgment conditions are set for the insulation fault detection results. For example, when the insulation resistance of the fuel cell in the first insulation status information is less than a first preset resistance value and greater than a second preset resistance value, it is considered that a fuel cell insulation fault warning has occurred in the fuel cell cooling system. When the insulation resistance of the power battery in the second insulation status information is less than a third preset resistance value and greater than a fourth preset resistance value, it is considered that a power battery insulation fault warning has occurred in the power battery cooling system. When the insulation resistance of the fuel cell in the first insulation status information is not greater than the second preset resistance value, it is considered that a fuel cell insulation fault has occurred in the fuel cell cooling system. When the insulation resistance of the power battery in the second insulation status information is not greater than the second preset resistance value, it is considered that a power battery insulation fault has occurred in the power battery cooling system. In this case, the first preset threshold value is greater than the second preset threshold value, and the third preset threshold value is greater than the fourth preset threshold value.

[0034] 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 the first 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 a 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.

[0035] In this embodiment, insulation fault warnings are divided into different types so as to implement different control strategies for different types, thereby improving vehicle safety control.

[0036] S102: According to the insulation fault detection result, control execution of an insulation fault processing strategy that matches the insulation fault detection result.

[0037] In step S102 , based on the insulation fault detection result, control is performed to execute an insulation fault processing strategy that matches the insulation fault detection result, wherein the insulation fault processing strategy is a strategy for ensuring safe driving of the vehicle.

[0038] In this embodiment, based on the detection result of the insulation fault, the insulation fault processing strategy that matches the detection result of the insulation fault is controlled and executed. The process of executing the insulation fault processing strategy includes a corresponding human-computer interaction process, that is, different strategies are executed according to the operation instructions of different users. Through the human-computer interaction process, the actual usage scenario can be taken into account, thereby increasing the reliability of the insulation processing strategy.

[0039] Optionally, according to the insulation fault detection result, controlling execution of an insulation fault processing strategy that matches the insulation fault detection result includes:

[0040] If the insulation fault detection result is no insulation fault warning, the vehicle is controlled to operate in the hybrid power output mode.

[0041] In this embodiment, in the hybrid power output mode, if the insulation fault detection result is no insulation fault warning, that is, there is no abnormality in the fuel cell cooling system and the power battery cooling system, 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 provide power to the vehicle at the same time.

[0042] 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, according to the insulation fault detection result, controlling the execution of the insulation fault processing strategy that matches the insulation fault detection result also includes:

[0043] S201: If the insulation fault detection result is a fuel cell insulation fault warning, obtaining an operation instruction from a first user;

[0044] S202: If the first user's operation instruction is not to switch to the pure electric power output mode, controlling the vehicle to restrict driving, performing an insulation fault test on the vehicle, and determining the insulation fault test result; if the insulation fault test result is a fuel cell insulation fault, controlling the vehicle to switch to the pure electric power output mode;

[0045] S203: In the pure electric power output mode, performing insulation fault detection on the power battery cooling system of the vehicle, and if a power battery insulation fault warning is present in the power battery cooling system, obtaining an operation instruction from a second user;

[0046] S204: If the second user's operation instruction is to perform maintenance without stopping, the vehicle is controlled to restrict driving, and an insulation fault detection is performed on the vehicle's power battery cooling system. If a power battery insulation fault occurs in the power battery cooling system, the vehicle is stopped and powered off.

[0047] In this embodiment, in hybrid power output mode, if the insulation fault detection result is a fuel cell insulation fault warning, 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, a selection of whether to switch to pure electric power output mode appears on the display. The pure electric power output mode is a mode in which the vehicle is powered by a power battery. The user selects this selection based on the actual scenario and obtains a first user operation instruction. If the user chooses not to switch to pure electric power output mode, i.e., the first user operation instruction is not to switch to pure electric power output mode, the vehicle is controlled to restrict travel, i.e., limit the vehicle's operating speed and power to within a certain range, so that the vehicle can remain in a safe state when traveling at the corresponding speed and power.

[0048] 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, and the vehicle is detected for insulation faults to determine the detection result of the insulation fault. If the detection result of the insulation fault is a fuel cell insulation fault, 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.

[0049] In pure electric power output mode, the vehicle's power battery cooling system is tested for insulation faults. If a power battery cooling system insulation fault warning is present, meaning the power battery insulation resistance is less than a third preset resistance and greater than a fourth preset resistance, a display appears indicating whether to stop for repairs. The user selects this option based on the actual scenario and receives a second user operation instruction. If the second user operation instruction indicates stopping for repairs, the vehicle is stopped and powered down. If the second user operation instruction indicates not stopping for repairs, the vehicle is restricted, i.e., its operating speed and power are limited to within a certain range, ensuring that the vehicle remains in a safe state while operating at the corresponding speed and power.

[0050] In pure electric power output mode, the vehicle's power battery cooling system continues to be tested for insulation faults. If there is a power battery insulation fault in the power battery cooling system, the vehicle is stopped and powered off. If the vehicle is restarted, the vehicle is stopped and powered off again.

[0051] After the user chooses not to switch into the pure electric power output mode, the insulation fault of the vehicle is detected to determine the detection result of the insulation fault. If the detection result of the insulation fault is a dual battery insulation fault warning, that is, the detection result of the insulation fault is a fuel cell insulation fault warning and a power battery insulation fault warning, that is, the insulation resistance of the fuel cell in the first insulation status information is less than the first preset resistance and greater than the second preset resistance, and the insulation resistance of the power battery in the second insulation status information is less than the third preset resistance and greater than the fourth preset resistance, 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 sixth user's 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, 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.

[0052] The vehicle continues to run, and the insulation fault of the vehicle is detected to determine the detection result of the insulation fault. If the detection result of the insulation fault is a power battery insulation fault, that is, the insulation resistance of the power battery is not greater than the second preset resistance, the vehicle is controlled to enter the fuel cell power output mode, that is, the fuel cell is used to provide power for the vehicle.

[0053] In the fuel cell power output mode, the fuel cell cooling system of the vehicle is tested for insulation faults. If there is a fuel cell insulation fault in the fuel cell cooling system, that is, the insulation resistance of the fuel cell is not greater than a second preset resistance, the vehicle is stopped and powered off.

[0054] Under the dual battery insulation fault warning, continue driving and perform insulation fault detection on the vehicle again. If the insulation fault detection result is a fuel cell insulation failure, the vehicle is controlled to switch to 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, the vehicle's power battery cooling system is checked for insulation faults. If there is a power battery insulation fault in the power battery cooling system, that is, the insulation resistance of the power battery is not greater than a second preset resistance, the vehicle is stopped and powered off. If the vehicle is started again, the stopping and powering-off process is continued.

[0056] 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 obtaining the operation instruction of the first user, the following is also included:

[0057] S301: If the first user's operation instruction is to switch to the pure electric power output mode, performing insulation fault detection on the vehicle's power battery cooling system. If the power battery cooling system has a power battery insulation fault warning, obtaining the second user's operation instruction;

[0058] S302: If the second user's operation instruction is to perform maintenance without stopping, restricting the vehicle's travel, performing insulation fault detection on the vehicle's power battery cooling system, and obtaining a third user's operation instruction if a power battery insulation fault exists in the power battery cooling system;

[0059] S303: If the third user operation instruction is to switch the fuel cell power output mode, the vehicle is controlled to restrict driving, and 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 vehicle is stopped and powered off.

[0060] In this embodiment, after a selection appears on the display regarding whether to switch to pure electric power output mode, the user makes a selection based on the actual scenario, resulting in a first user operation instruction. If the user selects to switch to pure electric power output mode, i.e., the first user operation instruction is to switch to pure electric power output mode, the vehicle operates in pure electric power output mode, and an insulation fault detection is performed on the vehicle's power battery cooling system. If a power battery insulation fault warning is detected in the power battery cooling system, i.e., the insulation resistance of the power battery is less than a third preset resistance value and greater than a fourth preset resistance value, a selection appears on the display regarding whether to stop for maintenance, and the user makes a selection based on the actual scenario, resulting in a second user operation instruction. If the second user operation instruction is to stop for maintenance, the vehicle is stopped and powered down. If the second user operation instruction is not to stop for maintenance, the vehicle is controlled to operate in a restricted manner, i.e., the vehicle's operating speed and power are limited to within a certain range, so that the vehicle can operate safely at the corresponding speed and power.

[0061] In pure electric power output mode, the vehicle's power battery cooling system is tested for insulation faults. If a power battery insulation fault exists in the power battery cooling system, the display will display a selection of whether to switch to fuel cell power output mode. The user selects the selection based on the actual scenario and receives a third user operation instruction. If the third user operation instruction is to switch to fuel cell power output mode, the vehicle is controlled to limit driving speed and power to within a certain range, so that the vehicle can maintain a safe state when driving at the corresponding speed and power. If the third user operation instruction is not to switch to fuel cell power output mode, the vehicle is parked and powered down.

[0062] After switching to the fuel cell power output mode, the fuel cell is used to power the vehicle, and the fuel cell cooling system of the vehicle is detected for insulation faults. If there is a fuel cell insulation fault in the fuel cell cooling system, the vehicle is stopped and powered off. If the vehicle is restarted, the shutdown is continued.

[0063] 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, according to the insulation fault detection result, controlling the execution of the insulation fault processing strategy that matches the insulation fault detection result also includes:

[0064] S401: If the insulation fault detection result is a power battery insulation fault warning, obtain a fourth user operation instruction;

[0065] S402: If the fourth user operation instruction is not to switch to the fuel cell power output mode, controlling the vehicle to restrict driving, performing an insulation fault test on the vehicle, and determining the insulation fault test result; if the insulation fault test result is a power battery insulation fault, controlling the vehicle to switch to the fuel cell power output mode;

[0066] S403: In the fuel cell power output mode, performing insulation fault detection on the fuel cell cooling system of the vehicle, and obtaining an operation instruction from the second user if a fuel cell insulation fault warning is present in the fuel cell cooling system;

[0067] S404: If the second user's operation instruction is to perform maintenance without stopping, the vehicle is controlled to restrict driving, and 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 vehicle is stopped and powered off.

[0068] In this embodiment, in hybrid power output mode, if the insulation fault detection result is a power battery insulation fault warning, i.e., the insulation resistance of the power battery in the second insulation status information is less than a third preset resistance value and greater than a fourth preset resistance value, a selection is displayed on the display as to whether to switch to fuel cell power output mode. Fuel cell power output mode is a mode in which a fuel cell is used to power the vehicle. The user selects this selection based on the actual scenario and receives a fourth user operation instruction. If the user chooses not to switch to fuel cell power output mode, i.e., the fourth user operation instruction is to not switch to fuel cell power output mode, the vehicle is controlled to restrict travel, i.e., limit the vehicle's operating speed and power to within a certain range, so that the vehicle remains in a safe state while traveling at the corresponding speed and power.

[0069] The user chooses not to switch to the fuel cell power output mode, that is, the vehicle still operates in the hybrid power output mode, and the vehicle is detected for insulation fault to determine the insulation fault detection result. If the insulation fault detection result is a power battery insulation fault, that is, the insulation resistance of the power battery is not greater than the second preset resistance, the vehicle is controlled to switch to the fuel cell power output mode, that is, the fuel cell is used to provide power for the vehicle.

[0070] In fuel cell power output mode, the vehicle's fuel cell cooling system is tested for insulation faults. If a fuel cell insulation fault warning is present in the fuel cell cooling system, meaning the fuel cell insulation resistance is less than a first preset resistance and greater than a second preset resistance, a display appears indicating whether to stop the vehicle for repairs. The user selects this option based on the actual scenario and receives a second user operation instruction. If the second user operation instruction indicates a stop for repairs, the vehicle is stopped and powered down. If the second user operation instruction indicates a non-stop repair, the vehicle is restricted in travel, limiting its speed and power to within a certain range, ensuring a safe state while operating at the corresponding speed and power.

[0071] In the fuel cell power output mode, the fuel cell cooling system of the vehicle is continuously tested for insulation faults. If there is a fuel cell insulation fault in the fuel cell cooling system, the vehicle is stopped and powered off.

[0072] After the user chooses not to enter the fuel cell power output mode, the vehicle's insulation fault is detected to determine the detection result of the insulation fault. If the detection result of the insulation fault is a dual battery insulation fault warning, that is, the detection result of the insulation fault is a fuel cell insulation fault warning and a power battery insulation fault warning, that is, the insulation resistance of the fuel cell in the first insulation status information is less than the first preset resistance and greater than the second preset resistance, and the insulation resistance of the power battery in the second insulation status information is less than the third preset resistance and greater than the fourth preset resistance, a selection of whether to stop and power off appears on the display. If the user chooses not to stop and power off, that is, the sixth user's operation instruction is to power off without stopping, 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.

[0073] The vehicle continues to run, and the insulation fault of the vehicle is detected to determine the detection result of the insulation fault. If the detection result of the insulation fault is a power battery insulation fault, that is, the insulation resistance of the power battery is not greater than the second preset resistance, the vehicle is controlled to enter the fuel cell power output mode, that is, the fuel cell is used to provide power for the vehicle.

[0074] In the fuel cell power output mode, the vehicle's fuel cell cooling system is checked for insulation faults. If there is a fuel cell insulation fault in the fuel cell cooling system, that is, the insulation resistance of the fuel cell is not greater than a second preset resistance, the vehicle is stopped and powered off. If the vehicle is restarted, the shutdown is continued.

[0075] Under the dual battery insulation fault warning, continue driving and perform insulation fault detection on the vehicle again. If the insulation fault detection result is a fuel cell insulation failure, the vehicle is controlled to switch to pure electric power output mode, that is, the power battery is used to provide power for the vehicle.

[0076] In pure electric power output mode, the vehicle's power battery cooling system is checked for insulation faults. If there is a power battery insulation fault in the power battery cooling system, that is, the insulation resistance of the power battery is not greater than a second preset resistance, the vehicle is stopped and powered off. If the vehicle is restarted, the stopping and powering-off process continues.

[0077] 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 obtaining the fourth user operation instruction, the method further includes:

[0078] S501: If the fourth user's operation instruction is to switch to the fuel cell power output mode, then an insulation fault detection is performed on the fuel cell cooling system of the vehicle. If a fuel cell insulation fault warning is present in the fuel cell cooling system, then an operation instruction of the second user is obtained.

[0079] S502: If the second user's operation instruction is to perform maintenance without stopping, restricting the vehicle's travel, performing insulation fault detection on the vehicle's fuel cell cooling system, and obtaining a fifth user's operation instruction if a fuel cell insulation fault exists in the fuel cell cooling system;

[0080] S503: If the fifth user operation instruction is to switch to the pure electric power output mode, the vehicle is controlled to restrict driving, and the power battery cooling system of the vehicle is checked for insulation faults. If the power battery cooling system has a power battery insulation fault, the vehicle is stopped and powered off.

[0081] In this embodiment, after a selection appears on the display regarding whether to switch to fuel cell power output mode, the user makes a selection based on the actual scenario, resulting in a fourth user operation instruction. If the user selects to switch to pure electric power output mode (i.e., the fourth user operation instruction is to switch to pure electric power output mode), the vehicle operates in fuel cell power output mode, and an insulation fault detection is performed on the vehicle's fuel cell cooling system. If a fuel cell insulation fault warning is detected in the fuel cell cooling system (i.e., the fuel cell insulation resistance is less than a first preset resistance value and greater than a second preset resistance value), a selection appears on the display regarding whether to stop for maintenance. The user makes a selection based on the actual scenario, resulting in a second user operation instruction. If the second user operation instruction is to stop for maintenance, the vehicle is stopped and powered down. If the second user operation instruction is not to stop for maintenance, the vehicle is controlled to operate in a restricted manner, i.e., the vehicle's operating speed and power are limited to within a certain range, so that the vehicle can operate safely at the corresponding speed and power.

[0082] In fuel cell power output mode, the vehicle's fuel cell cooling system is tested for insulation faults. If a fuel cell insulation fault exists in the fuel cell cooling system, the display will display a selection of whether to switch to pure electric power output mode. The user selects the selection based on the actual scenario, and receives a fifth user operation instruction. If the fifth user operation instruction is to switch to pure electric battery power output mode, the vehicle is controlled to restrict 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. If the fifth user operation instruction is not to switch to pure electric power output mode, the vehicle is parked and powered down. If the vehicle is restarted, the parking and power down process continues.

[0083] After switching to pure electric power output mode, the power battery is used to power the vehicle, and the vehicle's power battery cooling system is tested for insulation faults. If there is a power battery insulation fault in the power battery cooling system, the vehicle is stopped and powered off.

[0084] 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 6 As shown, according to the insulation fault detection result, controlling the execution of the insulation fault processing strategy that matches the insulation fault detection result also includes:

[0085] S601: If the insulation fault detection result is a dual battery insulation fault warning, obtain a sixth user operation instruction;

[0086] S602: If the sixth user operation instruction is to power off without stopping the vehicle, restricting the vehicle from traveling, performing insulation fault detection on the vehicle, and determining the insulation fault detection result;

[0087] S603: If the insulation fault detection result is a power battery insulation fault, control the vehicle to switch to a fuel cell power output mode;

[0088] S604: Perform insulation fault detection on the fuel cell cooling system of the vehicle. If there is an insulation fault in the fuel cell, the vehicle is stopped and powered off.

[0089] In this embodiment, in the hybrid power output mode, if the detection result of the insulation fault is a dual-battery insulation fault warning, that is, the detection result of the insulation fault is a fuel cell insulation fault warning and a power battery insulation fault warning, that is, the insulation resistance of the fuel cell in the first insulation status information is less than the first preset resistance and greater than the second preset resistance, and the insulation resistance of the power battery in the second insulation status information is less than the third preset resistance and greater than the fourth preset resistance, a selection of whether to stop and power off appears on the display. If the user chooses not to stop and power off, that is, the sixth user's operation instruction is to power off without stopping, 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 within a certain range, so that the vehicle can be in a safe state when driving according to the corresponding speed and power.

[0090] The vehicle continues to run, and the insulation fault of the vehicle is detected to determine the detection result of the insulation fault. If the detection result of the insulation fault is a power battery insulation fault, that is, the insulation resistance of the power battery is not greater than the second preset resistance, the vehicle is controlled to enter the fuel cell power output mode, that is, the fuel cell is used to provide power for the vehicle.

[0091] In the fuel cell power output mode, the vehicle's fuel cell cooling system is checked for insulation faults. If there is a fuel cell insulation fault in the fuel cell cooling system, that is, the insulation resistance of the fuel cell is not greater than a second preset resistance, the vehicle is stopped and powered off. If the vehicle is restarted, the shutdown is continued.

[0092] 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, after determining the detection result of the insulation fault, the following steps are also included:

[0093] S701: If the insulation fault detection result is a fuel cell insulation fault, control the vehicle to switch to a pure electric power output mode;

[0094] S702: Perform insulation fault detection on the power battery cooling system of the vehicle. If there is a power battery insulation fault in the power battery cooling system, the vehicle is stopped and powered off.

[0095] In this embodiment, under the dual battery insulation fault warning, the vehicle continues to drive and performs insulation fault detection on the vehicle again. If the insulation fault detection result is a fuel cell insulation failure, the vehicle is controlled to switch to pure electric power output mode, that is, the power battery is used to provide power for the vehicle.

[0096] In pure electric power output mode, the vehicle's power battery cooling system is checked for insulation faults. If there is a power battery insulation fault in the power battery cooling system, that is, the insulation resistance of the power battery is not greater than a second preset resistance, the vehicle is stopped and powered off. If the vehicle is restarted, the stopping and powering-off process continues.

[0097] Real-time collection of first insulation status information from the fuel cell cooling system and second insulation status information from the power battery cooling system in the vehicle. Based on the first and second insulation status information, insulation fault detection is performed on the vehicle, and the insulation fault detection result is determined. Based on the insulation fault detection result, execution of an insulation fault handling strategy that matches the insulation fault detection result is controlled. In this application, when an insulation fault warning is detected in the vehicle, the power source causing the insulation fault is determined, and different handling strategies are implemented to prevent the insulation fault based on the different power sources causing the insulation fault, thereby improving the safety and reliability of the vehicle.

[0098] See also Figure 8 , is a structural diagram of a vehicle safety control system 80 provided by the eighth 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 and a vehicle controller 83. The vehicle controller 83 is connected to the fuel cell cooling system 81 and the power battery cooling system 82. The vehicle controller 83 is used for the vehicle safety control method.

[0099] In this embodiment, the fuel cell cooling system 81 and the power battery cooling system 82 detect insulation status information of the corresponding batteries within a preset interval time period, and send the corresponding insulation status information to the vehicle controller 83, which controls the real-time acquisition of first insulation status information of the fuel cell cooling system 81 and second insulation status information of the power battery cooling system 82. Based on the first insulation status information and the second insulation status information, the vehicle is tested for insulation faults and the insulation fault detection result is determined.

[0100] It should be noted that the fuel cell cooling system 81 and the power battery cooling system 82 transmit corresponding signals as insulation status information to the vehicle controller 83. Based on the received signals, the vehicle controller 83 performs insulation fault detection on the vehicle and determines the insulation fault detection result. For example, the fuel cell cooling system 81 transmits a fuel cell insulation status signal and a fuel cell insulation fault status signal to the vehicle controller 83. The fuel cell insulation status signal includes a fuel cell normal abnormality signal "0", a fuel cell insulation fault warning signal "1", and a fuel cell insulation fault signal "2". The fuel cell insulation fault status signal includes a fuel cell no insulation fault signal "0" and a fuel cell insulation fault signal "1".

[0101] 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 83. 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".

[0102] The vehicle controller 83 performs insulation fault detection on the vehicle based on the received signals and determines the insulation fault detection result. The insulation fault detection result includes the vehicle insulation status and the vehicle insulation fault status. Signals corresponding to the vehicle insulation status include a signal "00" indicating normal vehicle insulation status, a signal "11" indicating a fuel cell insulation fault warning in fuel cell power output mode, a signal "12" indicating a power battery insulation fault warning in pure electric power output mode, a signal "13" indicating a fuel cell insulation fault warning in hybrid power output mode, a signal "14" indicating a power battery insulation fault warning in hybrid power output mode, a signal "15" indicating a simultaneous fuel cell and power battery insulation fault warning in hybrid power output mode, a signal "21" indicating a fuel cell insulation fault in fuel cell power output mode, a signal "22" indicating a power battery insulation fault in pure electric power output mode, a signal "23" indicating a fuel cell insulation fault in hybrid power output mode, a signal "24" indicating a power battery insulation fault in hybrid power output mode, and a signal "25" indicating a dual battery insulation fault in 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.

[0103] The vehicle's safety control system 20 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 cell 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 cell 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 cell power output mode signal "2x2", a failure signal to switch to the pure electric power output mode "2x3", a failure signal to switch to the fuel cell power output mode "2x4".

[0104] 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.

[0105] When controlling the corresponding mode, the vehicle controller 83 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 cell 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."

[0106] 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."

[0107] In the hybrid power output mode, the fuel cell cooling system detects the insulation resistance of the fuel cell at regular intervals. If the insulation resistance of the fuel cell is detected to be greater than a preset first resistance value for two consecutive times, the fuel cell insulation status signal "0", the fuel cell insulation fault status signal "0", and the insulation resistance of the fuel cell are sent to the vehicle controller. The power battery cooling system detects the insulation resistance of the power battery at regular intervals. If the insulation resistance of the power battery is detected to be greater than a preset third resistance value for two consecutive times, the power battery insulation status signal "0", the power battery insulation fault status signal "0", and the insulation resistance of the power battery are sent to the vehicle controller. Based on the received information, the vehicle controller performs insulation fault detection on the vehicle and determines that the insulation fault detection result is no insulation fault warning. The vehicle controller sets the vehicle insulation status signal to "0", the vehicle insulation fault status signal to "0", the warning light on the instrument display is off, and the instrument display indicates "0x0". The hybrid power output mode is continued, the hybrid power output mode activation signal is set to "1", the fuel cell power output mode activation signal "1" is sent to the fuel cell cooling system, and the pure electric power output mode activation signal "1" is sent to the power battery cooling system.

[0108] In the hybrid output mode, the fuel cell cooling system detects the insulation resistance of the fuel cell at regular intervals. If the insulation resistance of the fuel cell is detected to be less than a first preset resistance and greater than a second preset resistance for two consecutive times, the fuel cell insulation status signal "1", the fuel cell insulation fault status signal "0", and the insulation resistance of the fuel cell are sent to the vehicle controller. The power battery cooling system detects the insulation resistance of the power battery at regular intervals. If the insulation resistance of the power battery is detected to be greater than a preset third preset resistance for two consecutive times, the power battery insulation status signal "0", the power battery insulation fault status signal "0", and the insulation resistance of the power battery are sent to the vehicle controller. The vehicle controller performs insulation fault detection on the vehicle based on the received information and determines that the insulation fault detection result is a fuel cell insulation fault warning.

[0109] In hybrid output mode, the fuel cell insulation fault warning is activated, but the power battery has no insulation fault warning. The insulation fault handling strategies include:

[0110] The vehicle insulation status signal is set to "13", the vehicle insulation fault status signal is set to "0", the warning light on the instrument display is yellow, and the instrument display prompt signal is "0x1", which is a fuel cell insulation fault warning, and the signal of whether to switch to pure electric power output mode. The user selects according to the actual scenario. If the user chooses not to switch to pure electric power output mode, the enable hybrid power output mode is set to "1", and the enable fuel cell power output mode signal "1" is sent to the fuel cell cooling system, and the enable pure electric power output mode signal "1" is sent to the power battery cooling system. The warning light on the instrument display is yellow, the instrument display prompt signal is set to "0x0", the vehicle continues to operate in hybrid power output mode, and the vehicle limit driving signal is set to "1", causing the vehicle to reduce power and reduce speed.

[0111] The fuel cell cooling system detects the insulation resistance of the fuel cell at regular intervals. If the insulation resistance of the fuel cell is detected to be no greater than the second preset resistance for two consecutive times, the fuel cell cooling system sends the fuel cell insulation status signal "2" to the vehicle controller, the vehicle insulation status signal is set to "23", the vehicle insulation fault status signal is set to "3", the prompt light in the instrument display lights up red, and the instrument display prompt signal is set to "1x1", that is, the fuel cell insulation fault occurs, the pure electric power output mode signal is switched on, and the hybrid power output mode signal is set to "0". The vehicle controller sets the fuel cell power output mode enable signal to "0" and sends it to the fuel cell cooling system, and sets the pure electric power output mode enable signal to "1" and sends it to the power battery cooling system. The vehicle operates in pure electric power output mode.

[0112] In pure electric power output mode, the power battery cooling system detects the insulation resistance of the power battery at regular intervals. If the insulation resistance of the power battery is detected to be less than a third preset resistance value and greater than a fourth preset resistance value for two consecutive times, the power battery insulation status signal "1" and the power battery insulation fault status signal "0" are sent to the vehicle controller. The vehicle insulation status signal is set to "12", the warning light on the instrument display turns yellow, and the instrument display warning signal is set to "0x4", which is a power battery insulation fault warning and a signal indicating whether to stop for maintenance. If the user chooses to stop for maintenance, the pure electric power output mode activation signal "0" is sent to the power battery cooling system, shutting down the power battery. The stop power-off signal is set to "1". If the user chooses not to stop for maintenance, the vehicle restricted driving signal is set to "1", restricting the vehicle's driving, the warning light on the instrument display turns yellow, and the instrument display warning signal is set to "0x0".

[0113] In the pure electric power output mode, if the insulation resistance of the power battery is detected to be no greater than the fourth preset resistance for two consecutive times, the power battery cooling system will send the power battery insulation status signal "2" to the vehicle controller, the vehicle insulation status signal will be set to "22", the vehicle insulation fault status signal will be set to "2", the prompt light in the instrument display will light up red, and the instrument display prompt signal will be set to "1x4", that is, the power battery insulation fault, the parking power-off signal will be set to "0" and sent to the power battery cooling system, the power battery will be turned off, and the parking power-off signal will be set to "1". If the user starts the power-on, the start power-on signal will be set to "1", and the parking power-off signal will continue to be set to "1", and the start power-on signal will be set to "0".

[0114] In hybrid output mode, a fuel cell insulation fault warning is issued, but there is no power battery insulation fault warning. If the vehicle continues to operate in hybrid output mode and the power battery insulation resistance is detected twice in a row as being less than a preset third resistance but greater than a preset fourth threshold, a dual battery insulation fault warning is issued. The fuel cell cooling system sends the fuel cell insulation status signal "1" and the fuel cell insulation fault status signal "0" to the vehicle controller. The power battery cooling system sends the power battery insulation status signal "1" and the power battery insulation fault status signal "0" to the vehicle controller. The vehicle controller sets the vehicle insulation status signal to "15" and the vehicle insulation fault status signal to "0". The warning light on the instrument display lights up yellow, and the instrument display prompts the signal "0x5", which is a dual battery insulation fault warning. If the user chooses to stop and power off, the hybrid output mode activation signal is set to "0", the fuel cell power output mode activation signal "0" is sent to the fuel cell cooling system, the pure electric power output mode activation signal "0" is sent to the power battery cooling system, and the stop and power off signal is set to "1". If the user chooses to power off without stopping, the vehicle's restricted driving signal is set to "1", causing the vehicle to reduce power and speed, and the hybrid output mode enable signal is set to "1". The vehicle controller sets the fuel cell power output mode enable signal to "1" and sends it to the fuel cell cooling system, and sets the pure electric power output mode enable signal to "1" and sends it to the power battery cooling system. The prompt light on the instrument display lights up yellow, and the instrument display prompt signal is set to "0x0".

[0115] After continuing to operate in hybrid power mode, if the fuel cell insulation resistance is detected to be no greater than the preset second threshold value for two consecutive times, the fuel cell cooling system sends a fuel cell insulation status signal of "2" and a fuel cell insulation fault status signal of "1" to the vehicle controller. If the power battery insulation resistance is detected to be no greater than the preset fourth threshold value for two consecutive times, the power battery cooling system sends a power battery insulation status signal of "2" and a power battery insulation fault status signal of "1" to the vehicle controller. The vehicle controller sets the vehicle insulation status signal to "25" and the vehicle insulation fault status signal to "3." The warning light on the instrument display illuminates red, and the instrument display displays a "1x5" signal, indicating a dual battery insulation fault. The vehicle stops and powers off, and the hybrid power mode activation signal is set to "0." The fuel cell power output mode activation signal of "0" is sent to the fuel cell cooling system, and the pure electric power output mode activation signal of "0" is sent to the power battery cooling system. The stop power-off signal is set to "1." If the user initiates power-on, the start power-on signal is set to "1." The stop power-off signal is then set to "1," and the start power-on signal is set to "0."

[0116] After continuing to operate in hybrid power output mode, if the power battery insulation resistance is detected to be less than or equal to the preset fourth threshold value for two consecutive times, the power battery cooling system transmits a power battery insulation status signal of "2" and a power battery insulation fault status signal of "1" to the vehicle controller. The vehicle controller sets the vehicle insulation status signal to "24" and the vehicle insulation fault status signal to "3." The warning light on the instrument display illuminates red, and the instrument display prompts "1x2," indicating a power battery insulation fault. The fuel cell power output mode is switched on, the hybrid power output mode enable signal is set to "0," and the fuel cell power output mode enable signal "1" is transmitted to the fuel cell cooling system, while the pure electric power output mode enable signal "0" is transmitted to the power battery cooling system. The vehicle controller sets the vehicle insulation status signal to "11" and the vehicle insulation fault status signal to "0." The vehicle restricted driving signal is set to "1" and transmitted to the fuel cell cooling system. The warning light on the instrument display illuminates yellow, and the instrument display prompt signal is set to "0x0," indicating no prompt signal, and the vehicle operates in fuel cell power output mode.

[0117] In fuel cell power output mode, if the fuel cell insulation resistance is detected to be less than or equal to the preset second threshold value for two consecutive times, the fuel cell cooling system transmits a fuel cell insulation status signal of "2" and a fuel cell insulation fault status signal of "1" to the vehicle controller. The vehicle controller sets the vehicle insulation status signal to "21" and the vehicle insulation fault status signal to "1." The warning light on the instrument display illuminates red, and the instrument display displays a signal of "1x3," indicating a fuel cell insulation fault and a vehicle shutdown signal. The fuel cell power output mode enable signal of "0" is transmitted to the fuel cell cooling system, and the vehicle shutdown signal is set to "1."

[0118] After continuing to operate in hybrid power output mode, if the fuel cell insulation resistance is detected to be less than or equal to the preset second threshold value for two consecutive times, the fuel cell cooling system sends a fuel cell insulation status signal of "2" and a fuel cell insulation fault status signal of "1" to the vehicle controller. The vehicle controller sets the vehicle insulation status signal to "23" and the vehicle insulation fault status signal to "3." The warning light on the instrument display illuminates red, and the instrument display prompt signal "1x1" indicates a fuel cell insulation fault. The vehicle switches to pure electric power output mode, sets the hybrid power output mode enable signal to "0," sends the fuel cell power output mode enable signal "0" to the fuel cell cooling system, and sends the pure electric power output mode enable signal "1" to the power battery cooling system. The vehicle controller sets the vehicle insulation status signal to "12" and the vehicle insulation fault status signal to "0." The vehicle control driving restriction signal is set to "1" and sent to the power battery cooling system. The warning light on the instrument display illuminates yellow, and the instrument display prompt signal is set to "0x0," indicating no prompt signal, and the vehicle operates in pure electric power output mode.

[0119] In pure electric power output mode, if the power battery insulation resistance is detected to be less than or equal to the preset fourth threshold value for two consecutive times, the power battery cooling system sends a power battery insulation status signal of "2" and a power battery insulation fault status signal of "1" to the vehicle controller. The vehicle controller sets the vehicle insulation status signal to "22" and the vehicle insulation fault status signal to "2." The warning light on the instrument display illuminates red, and the instrument display displays a "1x4" signal, indicating a power battery insulation fault. The pure electric power output mode activation signal of "0" is sent to the power battery cooling system, and the stop power-off signal is set to "1." If the user initiates power-on, the start power-on signal is set to "1," the stop power-off signal is set to "1," and the start power-on signal is set to "0."

[0120] In hybrid power output mode, there is a fuel cell insulation fault warning, and there is no power battery insulation fault warning. The instrument display prompts a signal "0x1", which is a fuel cell insulation fault warning. After the signal of whether to switch to pure electric power output mode is displayed, if the user chooses to switch to pure electric power output mode, the hybrid power output mode is enabled and set to "0", and the fuel cell power output mode enable signal "0" is sent to the fuel cell cooling system, and the pure electric power output mode enable signal "1" is sent to the power battery cooling system. The warning light in the instrument display is off, and the instrument display prompt signal is set to "0x0", and the vehicle operates in pure electric power output mode.

[0121] In pure electric power output mode, the power battery cooling system detects the insulation resistance of the power battery at regular intervals. If the insulation resistance of the power battery is detected to be less than a third preset resistance value and greater than a fourth preset resistance value for two consecutive times, the power battery insulation status signal "1" and the power battery insulation fault status signal "0" are sent to the vehicle controller. The vehicle insulation status signal is set to "12", the warning light on the instrument display turns yellow, and the instrument display warning signal is set to "0x4", which is a power battery insulation fault warning and a signal indicating whether to stop for maintenance. If the user chooses to stop for maintenance, the pure electric power output mode activation signal "0" is sent to the power battery cooling system, shutting down the power battery. The stop power-off signal is set to "1". If the user chooses not to stop for maintenance, the vehicle restricted driving signal is set to "1", restricting the vehicle's driving, the warning light on the instrument display turns yellow, and the instrument display warning signal is set to "0x0".

[0122] After the vehicle is controlled to restrict driving, the vehicle continues to operate in pure electric power output mode. If the insulation resistance of the power battery is detected to be no greater than the preset fourth threshold value for two consecutive times, the power battery cooling system will send the power battery insulation status signal "2" and the power battery insulation fault status signal "1" to the vehicle controller. The vehicle controller sets the vehicle insulation status signal to "22" and the vehicle insulation fault status signal to "2." The warning light on the instrument display illuminates red, and the instrument display displays a "2x2" signal, indicating whether to engage the fuel cell power take-off mode. If the user selects fuel cell power take-off mode, the vehicle's restricted driving signal is set to "1," causing the vehicle to reduce power and speed. A fuel cell power take-off mode activation signal of "1" is sent to the fuel cell cooling system, and a pure electric power take-off mode activation signal of "0" is sent to the power battery cooling system. The vehicle controller sets the vehicle insulation status signal to "11," the vehicle insulation fault status signal to "0," and the restricted driving signal to "1" is sent to the fuel cell cooling system. The warning light on the instrument display illuminates yellow, and the instrument display displays a "0x0" signal, indicating no warning signal, indicating that the vehicle is operating in fuel cell power take-off mode. In fuel cell power take-off mode, if the fuel cell insulation resistance is detected to be less than or equal to a preset second threshold value for two consecutive times, the fuel cell cooling system transmits a fuel cell insulation status signal of "2" and a fuel cell insulation fault status signal of "1" to the vehicle controller. The vehicle controller sets the vehicle insulation status signal to "21" and the vehicle insulation fault status signal to "1". The warning light in the instrument display lights up red, and the instrument display prompts the signal "1x3", that is, the fuel cell insulation fault, the stop power-off signal, and the fuel cell power output mode enable signal is set to "0" and sent to the fuel cell cooling system, and the stop power-off signal is set to "1". If the user starts the power-on, the start power-on signal is set to "1", and the stop power-off signal continues to be set to "1", and the start power-on signal is set to "0".

[0123] In hybrid output mode, there is no warning for fuel cell insulation failure, but there is a warning for power battery insulation failure.

[0124] Implementing an insulation fault handling strategy includes:

[0125] The vehicle controller sets the vehicle insulation status signal to "14" and the vehicle insulation fault status signal to "0." The warning light on the instrument display illuminates yellow, and the instrument display prompts "0x2," indicating a power battery insulation fault warning and whether to switch to fuel cell power output mode. The user makes a selection based on the actual scenario. If the user chooses not to switch to fuel cell power output mode, the hybrid power output mode is enabled, set to "1," and the fuel cell power output mode enable signal "1" is sent to the fuel cell cooling system. The pure electric power output mode enable signal "1" is also sent to the power battery cooling system. The warning light on the instrument display illuminates yellow, the instrument display prompt signal is set to "0x0," and the vehicle continues to operate in hybrid power output mode. The vehicle's restricted driving signal is set to "1," causing the vehicle to reduce power and speed.

[0126] The power battery cooling system detects the insulation resistance of the power battery at regular intervals. If the insulation resistance of the power battery is detected to be no greater than the fourth preset resistance for two consecutive times, the power battery cooling system sends the power battery insulation status signal "2" to the vehicle controller, the vehicle insulation status signal is set to "24", the vehicle insulation fault status signal is set to "3", the prompt light in the instrument display lights up red, and the instrument display prompt signal is set to "1x2", that is, the power battery insulation fault occurs, the fuel cell power output mode signal is switched on, and the hybrid power output mode signal is set to "0". The vehicle controller sets the fuel cell power output mode enable signal to "1" and sends it to the fuel cell cooling system, and sets the pure electric power output mode enable signal to "0" and sends it to the power battery cooling system. The vehicle operates in fuel cell power output mode.

[0127] In fuel cell power output mode, the fuel cell cooling system detects the fuel cell's insulation resistance at regular intervals. If the fuel cell insulation resistance is detected to be less than a first preset resistance and greater than a second preset resistance for two consecutive times, the fuel cell insulation status signal "1" and the fuel cell insulation fault status signal "0" are sent to the vehicle controller. The vehicle insulation status signal is set to "11", the warning light on the instrument display turns yellow, and the instrument display warning signal is set to "0x3", which is a fuel cell insulation fault warning and a signal indicating whether to stop for maintenance. If the user chooses to stop for maintenance, the fuel cell power output mode enable signal "0" is sent to the fuel cell cooling system, shutting down the fuel cell. The stop power-off signal is set to "1". If the user chooses not to stop for maintenance, the vehicle restricted driving signal is set to "1", restricting the vehicle's driving, the warning light on the instrument display turns yellow, and the instrument display warning signal is set to "0x0".

[0128] In the fuel cell power output mode, if the insulation resistance of the power battery is detected to be no greater than the second preset resistance for two consecutive times, the fuel cell cooling system will send the power battery insulation status signal "2" to the vehicle controller, the vehicle insulation status signal will be set to "21", the vehicle insulation fault status signal will be set to "2", the prompt light in the instrument display will light up red, and the instrument display prompt signal will be set to "1x3", that is, the fuel cell insulation fault, the stop power-off signal, the enable fuel cell power output mode signal will be set to "0" and sent to the fuel cell cooling system, the fuel cell will be turned off, and the stop power-off signal will be set to "1". If the user starts the power-on, the start power-on signal will be set to "1", and the stop power-off signal will continue to be set to "1", and the start power-on signal will be set to "0".

[0129] In hybrid output mode, there is no warning for fuel cell insulation fault, but a warning for power battery insulation fault. If the vehicle continues to operate in hybrid output mode, and if the fuel cell insulation resistance is detected twice in a row as less than a preset first resistance but greater than a preset second threshold, a dual battery insulation fault warning is issued. The fuel cell cooling system sends the fuel cell insulation status signal "1" and the fuel cell insulation fault status signal "0" to the vehicle controller. The power battery cooling system sends the power battery insulation status signal "1" and the power battery insulation fault status signal "0" to the vehicle controller. The vehicle controller sets the vehicle insulation status signal to "15" and the vehicle insulation fault status signal to "0". The warning light on the instrument display lights up yellow, and the instrument display prompts the signal "0x5", which is a dual battery insulation fault warning. If the user chooses to stop and power off, the hybrid output mode enable signal is set to "0", the fuel cell power output mode enable signal "0" is sent to the fuel cell cooling system, the pure electric power output mode enable signal "0," is sent to the power battery cooling system, and the stop and power off signal is set to "1". If the user chooses to power off without stopping the vehicle, the hybrid power output mode enable signal is set to "1", the vehicle controller sets the fuel cell power output mode enable signal to "1" and sends it to the fuel cell cooling system, and sets the pure electric power output mode enable signal to "1" and sends it to the power battery cooling system. The prompt light in the instrument display lights up yellow, the instrument display prompt signal is set to "0x0", and the vehicle restricted driving signal is set to "1".

[0130] After continuing to operate in hybrid power mode, if the fuel cell insulation resistance is detected to be no greater than the preset second threshold value for two consecutive times, the fuel cell cooling system sends a fuel cell insulation status signal of "2" and a fuel cell insulation fault status signal of "1" to the vehicle controller. If the power battery insulation resistance is detected to be no greater than the preset fourth threshold value for two consecutive times, the power battery cooling system sends a power battery insulation status signal of "2" and a power battery insulation fault status signal of "1" to the vehicle controller. The vehicle controller sets the vehicle insulation status signal to "25" and the vehicle insulation fault status signal to "3." The warning light on the instrument display illuminates red, and the instrument display displays a "1x5" signal, indicating a dual battery insulation fault. The vehicle stops and powers off, and the hybrid power mode activation signal is set to "0." The fuel cell power output mode activation signal of "0" is sent to the fuel cell cooling system, and the pure electric power output mode activation signal of "0" is sent to the power battery cooling system. The stop power-off signal is set to "1." If the user initiates power-on, the start power-on signal is set to "1." The stop power-off signal is then set to "1," and the start power-on signal is set to "0."

[0131] After continuing to operate in hybrid power output mode, if the power battery insulation resistance is detected to be less than or equal to the preset fourth threshold value for two consecutive times, the power battery cooling system transmits a power battery insulation status signal of "2" and a power battery insulation fault status signal of "1" to the vehicle controller. The vehicle controller sets the vehicle insulation status signal to "24" and the vehicle insulation fault status signal to "3." The warning light on the instrument display illuminates red, and the instrument display prompts "1x2," indicating a power battery insulation fault. The fuel cell power output mode is switched on, the hybrid power output mode enable signal is set to "0," and the fuel cell power output mode enable signal "1" is transmitted to the fuel cell cooling system, while the pure electric power output mode enable signal "0" is transmitted to the power battery cooling system. The vehicle controller sets the vehicle insulation status signal to "11" and the vehicle insulation fault status signal to "0." The vehicle restricted driving signal is set to "1" and transmitted to the fuel cell cooling system. The warning light on the instrument display illuminates yellow, and the instrument display prompt signal is set to "0x0," indicating no prompt signal, and the vehicle operates in fuel cell power output mode.

[0132] In fuel cell power output mode, if the fuel cell insulation resistance is detected to be less than or equal to the preset second threshold value for two consecutive times, the fuel cell cooling system sends a fuel cell insulation status signal of "2" and a fuel cell insulation fault status signal of "1" to the vehicle controller. The vehicle controller sets the vehicle insulation status signal to "21" and the vehicle insulation fault status signal to "1." The warning light on the instrument display illuminates red, and the instrument display displays a "1x3" signal, indicating a fuel cell insulation fault. The vehicle stops and powers off, and then sends a fuel cell power output mode enable signal of "0" to the fuel cell cooling system, setting the stop power off signal to "1." If the user initiates power on, the start power on signal is set to "1," and the stop power off signal is continuously set to "1," with the start power on signal set to "0."

[0133] After continuing to operate in hybrid power output mode, if the fuel cell insulation resistance is detected to be less than or equal to the preset second threshold value for two consecutive times, the fuel cell cooling system sends a fuel cell insulation status signal of "2" and a fuel cell insulation fault status signal of "1" to the vehicle controller. The vehicle controller sets the vehicle insulation status signal to "23" and the vehicle insulation fault status signal to "3." The warning light on the instrument display illuminates red, and the instrument display prompt signal "1x1" indicates a fuel cell insulation fault. The vehicle switches to pure electric power output mode, sets the hybrid power output mode enable signal to "0," sends the fuel cell power output mode enable signal "0" to the fuel cell cooling system, and sends the pure electric power output mode enable signal "1" to the power battery cooling system. The vehicle controller sets the vehicle insulation status signal to "12" and the vehicle insulation fault status signal to "0." The vehicle control driving restriction signal is set to "1" and sent to the power battery cooling system. The warning light on the instrument display illuminates yellow, and the instrument display prompt signal is set to "0x0," indicating no prompt signal, and the vehicle operates in pure electric power output mode.

[0134] In pure electric power output mode, if the power battery insulation resistance is detected to be less than or equal to the preset fourth threshold value for two consecutive times, the power battery cooling system sends a power battery insulation status signal of "2" and a power battery insulation fault status signal of "1" to the vehicle controller. The vehicle controller sets the vehicle insulation status signal to "22" and the vehicle insulation fault status signal to "2." The warning light on the instrument display illuminates red, and the instrument display displays a "1x4" signal, indicating a power battery insulation fault. The stop power-off signal activates pure electric power output mode, and the stop power-off signal is sent to the power battery cooling system, setting the stop power-off signal to "1." If the user starts powering on, the start power-on signal is set to "1," the stop power-off signal is set to "1," and the start power-on signal is set to "0."

[0135] In hybrid power output mode, there is no warning for fuel cell insulation failure, but there is a warning for power battery insulation failure. The instrument display prompts a signal "0x2", which is a warning for power battery insulation failure. After switching to fuel cell power output mode, if the user chooses to switch to fuel cell power output mode, the hybrid power output mode is enabled and set to "0", and the fuel cell power output mode enable signal "1" is sent to the fuel cell cooling system, and the pure electric power output mode enable signal "0" is sent to the power battery cooling system. The warning light in the instrument display is off, and the instrument display prompt signal is set to "0x0", and the vehicle operates in fuel cell power output mode.

[0136] In fuel cell power output mode, the fuel cell cooling system detects the fuel cell's insulation resistance at regular intervals. If the fuel cell insulation resistance is detected to be less than a first preset resistance and greater than a second preset resistance for two consecutive times, the fuel cell insulation status signal "1" and the fuel cell insulation fault status signal "0" are sent to the vehicle controller. The vehicle insulation status signal is set to "11", the warning light on the instrument display turns yellow, and the instrument display warning signal is set to "0x3", which is a fuel cell insulation fault warning and a signal indicating whether to stop for maintenance. If the user chooses to stop for maintenance, the fuel cell power output mode enable signal "0" is sent to the fuel cell cooling system, shutting down the fuel cell. The stop power-off signal is set to "1". If the user chooses not to stop for maintenance, the vehicle restricted driving signal is set to "1", restricting the vehicle's driving, the warning light on the instrument display turns yellow, and the instrument display warning signal is set to "0x0".

[0137] After the vehicle is restricted from operating, it continues to operate in fuel cell power take-off mode. If the fuel cell insulation resistance is detected to be less than or equal to a preset second threshold value for two consecutive times, the fuel cell cooling system transmits a fuel cell insulation status signal of "2" and a fuel cell insulation fault status signal of "1" to the vehicle controller. The vehicle controller sets the vehicle insulation status signal to "21" and the vehicle insulation fault status signal to "2." The warning light on the instrument display illuminates red, and the instrument display prompt signal "2x1" indicates whether to switch to pure electric power take-off mode. If the user selects pure electric power take-off mode, the fuel cell power take-off mode enable signal "0" and the pure electric power take-off mode enable signal "1" are transmitted to the fuel cell cooling system. The vehicle controller sets the vehicle insulation status signal to "12" and the vehicle insulation fault status signal to "0." The vehicle restriction signal is set to "1" and sent to the fuel cell cooling system. The warning light on the instrument display illuminates yellow, and the instrument display prompt signal is set to "0x0," indicating no prompt signal, and the vehicle operates in pure electric power take-off mode.

[0138] In pure electric power output mode, if the insulation resistance of the pure electric battery is detected to be less than or equal to the preset fourth threshold value for two consecutive times, the power battery cooling system sends a power battery insulation status signal of "2" and a power battery insulation fault status signal of "1" to the vehicle controller. The vehicle controller sets the vehicle insulation status signal to "22" and the vehicle insulation fault status signal to "1." The warning light on the instrument display illuminates red, and the instrument display prompts a signal of "1x4," indicating a power battery insulation fault. A stop-power-off signal and the activation of pure electric power output mode are sent to the power battery cooling system with a "0" signal, setting the stop-power-off signal to "1." If the user initiates power-on, the start-up signal is set to "1," the stop-power-off signal continues to be set to "1," and the start-up signal is set to "0."

[0139] See also Figure 9 , is a structural diagram of a vehicle 90 provided in a ninth 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 a fuel cell cooling system and second insulation state information of a power battery cooling system in a vehicle in real time, performing insulation fault detection on the vehicle based on the first insulation state information and the second insulation state information, and determining a detection result of the insulation fault; According to the detection result of the insulation fault, controlling the execution of an insulation fault processing strategy that matches the detection result of the insulation fault; The controlling, according to the insulation fault detection result, to execute an insulation fault processing strategy that matches the insulation fault detection result, further includes: If the insulation fault detection result is a fuel cell insulation fault warning, obtaining an operation instruction from the first user; If the first user's operation instruction is not to switch to the pure electric power output mode, controlling the vehicle to restrict driving, performing an insulation fault detection on the vehicle, determining the insulation fault detection result, and if the insulation fault detection result is a fuel cell insulation fault, controlling the vehicle to switch to the pure electric power output mode; In a pure electric power output mode, performing insulation fault detection on a power battery cooling system of the vehicle, and obtaining an operation instruction from a second user if a power battery insulation fault warning is present in the power battery cooling system; If the operation instruction of the second user is to perform maintenance without stopping, the vehicle is controlled to restrict driving, and an insulation fault detection is performed on the power battery cooling system of the vehicle. If a power battery insulation fault occurs in the power battery cooling system, the vehicle is stopped and powered off.

2. The vehicle safety control method according to claim 1, wherein: The controlling, based on the insulation fault detection result, to execute an insulation fault processing strategy that matches the insulation fault detection result, includes: If the insulation fault detection result is no insulation fault warning, the vehicle is controlled to operate in a hybrid power output mode.

3. The vehicle safety control method according to claim 1, wherein: After obtaining the operation instruction of the first user, the method further includes: If the first user's operation instruction is to switch to the pure electric power output mode, performing insulation fault detection on the power battery cooling system of the vehicle, and if the power battery cooling system has a power battery insulation fault warning, obtaining the second user's operation instruction; If the second user's operation instruction is to carry out maintenance without stopping, the vehicle is restricted in travel, an insulation fault detection is performed on the power battery cooling system of the vehicle, and if a power battery insulation fault exists in the power battery cooling system, an operation instruction of a third user is obtained; If the third user operation instruction is to switch the fuel cell power output mode, the vehicle is controlled to restrict driving, and the fuel cell cooling system of the vehicle is detected for insulation fault. If the fuel cell cooling system has a fuel cell insulation fault, the vehicle is stopped and powered off.

4. The vehicle safety control method according to claim 1, wherein: The controlling, according to the insulation fault detection result, to execute an insulation fault processing strategy that matches the insulation fault detection result, further includes: If the insulation fault detection result is a power battery insulation fault warning, obtaining a fourth user operation instruction; If the fourth user operation instruction is not to switch to the fuel cell power output mode, controlling the vehicle to restrict travel, performing an insulation fault detection on the vehicle, determining a detection result of the insulation fault of the vehicle, and if the insulation fault detection result is a power battery insulation fault, controlling the vehicle to switch to the fuel cell power output mode; In a fuel cell power output mode, performing insulation fault detection on a fuel cell cooling system of the vehicle, and obtaining an operation instruction from a second user if a fuel cell insulation fault warning is present in the fuel cell cooling system; If the second user's operation instruction is to perform maintenance without stopping, the vehicle is controlled to restrict driving, and the fuel cell cooling system of the vehicle is checked for insulation faults. If the fuel cell cooling system has a fuel cell insulation fault, the vehicle is stopped and powered off.

5. The vehicle safety control method according to claim 4, characterized in that: After obtaining the fourth user operation instruction, the method further includes: If the fourth user's operation instruction is to switch into the fuel cell power output mode, performing insulation fault detection on the fuel cell cooling system of the vehicle, and if the fuel cell cooling system has a fuel cell insulation fault warning, obtaining the second user's operation instruction; If the second user's operation instruction is to perform maintenance without stopping, the vehicle is restricted from driving, an insulation fault detection is performed on the fuel cell cooling system of the vehicle, and if a fuel cell insulation fault exists in the fuel cell cooling system, a fifth user's operation instruction is obtained; If the fifth user operation instruction is to switch to the pure electric power output mode, the vehicle is controlled to restrict driving, and an insulation fault detection is performed on the power battery cooling system of the vehicle. If a power battery insulation fault occurs in the power battery cooling system, the vehicle is stopped and powered off.

6. The vehicle safety control method according to claim 1, wherein: The controlling, according to the insulation fault detection result, to execute an insulation fault processing strategy that matches the insulation fault detection result, further includes: If the insulation fault detection result is a dual-battery insulation fault warning, obtaining a sixth user operation instruction; If the sixth user operation instruction is to power off without stopping the vehicle, controlling the vehicle to restrict travel, performing insulation fault detection on the vehicle, and determining a detection result of the insulation fault of the vehicle; If the insulation fault detection result is a power battery insulation fault, controlling the vehicle to enter a fuel cell power output mode; An insulation fault detection is performed on the fuel cell cooling system of the vehicle. If a fuel cell insulation fault occurs in the fuel cell cooling system, the vehicle is stopped and powered off.

7. The vehicle safety control method according to claim 6, characterized in that: After determining the detection result of the insulation fault of the vehicle, the method further includes: If the insulation fault detection result is a fuel cell insulation fault, controlling the vehicle to enter a pure electric power output mode; An insulation fault detection is performed on a power battery cooling system of the vehicle. If a power battery insulation fault occurs in the power battery cooling system, the vehicle is stopped and powered off.

8. A vehicle safety control system, characterized in that: include: A fuel cell cooling system, a power battery cooling system and a vehicle controller, wherein the vehicle controller is connected to the fuel cell cooling system and the power battery cooling system, and the vehicle controller is used to execute the vehicle safety control method according to any one of claims 1 to 7.

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

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