WO2023125127A1 - 新能源车辆安全保护方法、装置、车辆及存储介质 - Google Patents

新能源车辆安全保护方法、装置、车辆及存储介质 Download PDF

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Publication number
WO2023125127A1
WO2023125127A1 PCT/CN2022/140229 CN2022140229W WO2023125127A1 WO 2023125127 A1 WO2023125127 A1 WO 2023125127A1 CN 2022140229 W CN2022140229 W CN 2022140229W WO 2023125127 A1 WO2023125127 A1 WO 2023125127A1
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WO
WIPO (PCT)
Prior art keywords
new energy
energy vehicle
preset
vehicle
rear axle
Prior art date
Application number
PCT/CN2022/140229
Other languages
English (en)
French (fr)
Inventor
张博
刘帅
Original Assignee
长城汽车股份有限公司
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Filing date
Publication date
Application filed by 长城汽车股份有限公司 filed Critical 长城汽车股份有限公司
Publication of WO2023125127A1 publication Critical patent/WO2023125127A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
    • B60W50/0205—Diagnosing or detecting failures; Failure detection models
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/02—Dead-man's devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
    • B60W50/029—Adapting to failures or work around with other constraints, e.g. circumvention by avoiding use of failed parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Definitions

  • the present application relates to the technical field of new energy vehicles, in particular to a new energy vehicle safety protection method, device, vehicle and storage medium.
  • New energy vehicles usually use unconventional vehicle fuel as a power source, or use conventional vehicle fuel and adopt a new vehicle power device.
  • New energy vehicles include hybrid vehicles, pure electric vehicles, fuel cell electric vehicles and other new energy vehicles.
  • the method of limiting the torque is usually used for emergency control of the vehicle.
  • the method of limiting torque requires a certain amount of time to stop the vehicle, and during this time, the abnormal situation may be made more serious and the safety is poor.
  • the present application provides a new energy vehicle safety protection method, device, vehicle and storage medium to solve the problem that the existing technology may make the abnormal situation more serious and the safety is poor.
  • the present application provides a safety protection method for a new energy vehicle.
  • the new energy vehicle includes a rear axle gearbox.
  • the safety protection method for the new energy vehicle includes:
  • the preset abnormal condition includes at least one of rear axle gearbox overspeed fault, collision accident, high voltage interlock fault and rear wheel lock fault;
  • a gear-off control command is generated and sent to the rear axle gearbox controller; the gear-off control command is used to instruct the rear axle gearbox controller to control the rear axle The transmission shifts from the current gear to neutral.
  • detecting whether a preset abnormal condition occurs in a new energy vehicle includes:
  • the preset condition is that the rotation speed of the rear axle gearbox is greater than the second preset rotation speed, and the duration of the rotation speed of the rear axle gearbox greater than the second preset rotation speed is longer than the preset duration; the first preset rotation speed is greater than the second preset rotation speed Rotating speed.
  • detecting whether a preset abnormal condition occurs in a new energy vehicle includes:
  • detecting whether a preset abnormal condition occurs in a new energy vehicle includes:
  • detecting whether a preset abnormal condition occurs in a new energy vehicle includes:
  • the front wheel speed of the new energy vehicle is greater than the first preset wheel speed threshold, the rear wheel speed of the new energy vehicle is less than the second preset wheel speed threshold and the speed of the new energy vehicle is greater than the preset speed threshold, then it is determined that the new energy The vehicle has a preset abnormal situation;
  • the first preset wheel speed threshold is greater than the second preset wheel speed threshold.
  • the front wheel speed of the new energy vehicle is greater than the first preset wheel speed threshold
  • the rear wheel speed of the new energy vehicle is less than the second preset wheel speed threshold and the vehicle speed of the new energy vehicle is greater than If the preset speed threshold is determined, it is determined that the new energy vehicle has a preset abnormal situation, including:
  • the front wheel speed of the new energy vehicle is greater than the first preset wheel speed threshold, the rear wheel speed of the new energy vehicle is less than the second preset wheel speed threshold, the speed of the new energy vehicle is greater than the preset speed threshold and the P4 motor fault signal, it is determined that the new energy vehicle has a preset abnormal situation.
  • the present application provides a new energy vehicle safety protection device.
  • the new energy vehicle includes a rear axle gearbox, and the new energy vehicle safety protection device includes:
  • the detection module is used to detect whether a preset abnormal condition occurs in the new energy vehicle;
  • the preset abnormal condition includes at least one of rear axle gearbox overspeed fault, collision accident, high-voltage interlock fault and rear wheel lock fault;
  • the control module is used to generate a gear-off control command and send the gear-off control command to the rear axle gearbox controller if a preset abnormal situation occurs in the new energy vehicle is detected; the gear-off control command is used to instruct the rear axle gearbox
  • the controller controls the rear axle gearbox to switch from the current gear to neutral.
  • the detection module is specifically used to:
  • the preset condition is that the rotation speed of the rear axle gearbox is greater than the second preset rotation speed, and the duration of the rotation speed of the rear axle gearbox greater than the second preset rotation speed is longer than the preset duration; the first preset rotation speed is greater than the second preset rotation speed Rotating speed.
  • the detection module is specifically used to:
  • the detection module is specifically used to:
  • the detection module is specifically used to:
  • the front wheel speed of the new energy vehicle is greater than the first preset wheel speed threshold, the rear wheel speed of the new energy vehicle is less than the second preset wheel speed threshold and the speed of the new energy vehicle is greater than the preset speed threshold, then it is determined that the new energy The vehicle has a preset abnormal situation;
  • the first preset wheel speed threshold is greater than the second preset wheel speed threshold.
  • the detection module is specifically used to:
  • the front wheel speed of the new energy vehicle is greater than the first preset wheel speed threshold, the rear wheel speed of the new energy vehicle is less than the second preset wheel speed threshold, the speed of the new energy vehicle is greater than the preset speed threshold and the P4 motor fault signal, it is determined that the new energy vehicle has a preset abnormal situation.
  • the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and operable on the processor.
  • the processor executes the computer program, the above The steps of the new energy vehicle safety protection method described in the first aspect or any possible implementation of the first aspect.
  • an embodiment of the present application provides a vehicle, including the electronic device as described in the third aspect.
  • the embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it realizes any of the first aspect or the first aspect.
  • a possible implementation mode is the steps of the new energy vehicle safety protection method.
  • the embodiment of the present application provides a new energy vehicle safety protection method, device, vehicle, and storage medium.
  • detecting whether a preset abnormal condition occurs in a new energy vehicle it is specifically detected whether the vehicle has a rear axle gearbox overspeed fault, a collision accident, a high-voltage mutual At least one of lock failure and rear wheel lock failure, if it is detected that the new energy vehicle has a preset abnormal situation, a disengagement control command is generated, and the disengagement control command is sent to the rear axle gearbox controller;
  • the control command is used to instruct the rear axle gearbox controller to control the rear axle gearbox to switch from the current gear to the neutral gear, which can trigger the new energy vehicle to disengage when an emergency abnormal situation occurs in the new energy vehicle, and can stop the new energy vehicle in time , prevent further vehicle accidents from being caused, prevent occurrence of a situation that makes the abnormal situation more serious, and can improve safety.
  • FIG. 1 is a flow chart of the implementation of the new energy vehicle safety protection method provided by the embodiment of the present application
  • Fig. 2 is a schematic structural diagram of a new energy vehicle safety protection device provided by an embodiment of the present application
  • Fig. 3 is a schematic diagram of an electronic device provided by an embodiment of the present application.
  • FIG. 1 shows a flow chart of the implementation of the new energy vehicle safety protection method provided by the embodiment of the present application.
  • the execution body of the method may be an electronic device, and the electronic device may be the vehicle controller of the vehicle.
  • the above-mentioned new energy vehicle includes a rear axle gearbox, and the method is described in detail as follows:
  • the preset abnormal condition includes at least one of rear axle gearbox overspeed fault, collision accident, high voltage interlock fault and rear wheel lock fault.
  • the preset abnormal situation refers to an abnormal situation with a relatively high risk level.
  • the vehicle if at least one of the rear axle gearbox overspeed fault, collision accident, high voltage interlock fault and rear wheel lock fault occurs in the vehicle, it is determined that the vehicle has a preset abnormal situation; If there is a transmission overspeed fault, a collision accident, a high-voltage interlock fault, or a rear wheel lock fault, it is determined that the vehicle does not have a preset abnormal condition.
  • the preset abnormal situation can also include other abnormal situations with a higher risk level, which will not be detailed here. limit.
  • Rear axle gearbox overspeed fault refers to the speed of the rear axle gearbox of the vehicle is too high.
  • a collision accident refers to a collision between a vehicle and other vehicles or other things, which is a relatively serious collision accident.
  • High-voltage interlock failure is a common failure of new energy vehicles.
  • the high-voltage components (and their connectors) of the vehicle should all have high-voltage interlocking devices.
  • the function of the high-voltage interlock is to use a small current of 12V to confirm the integrity of the entire high-voltage electrical system. All high-voltage components and harness connectors of the vehicle must be installed in place to ensure that there is no short circuit or open circuit. When it is detected that the high-voltage interlock circuit is disconnected or the integrity is damaged, it is confirmed that a high-voltage interlock fault occurs.
  • the rear wheel locking fault can refer to the rear wheel locking fault of the vehicle, that is, during the braking process, the rear wheel stops rotating due to the braking torque and slips on the road.
  • a gear-off control command is generated and sent to the rear axle gearbox controller; the gear-off control command is used to instruct the rear axle gearbox control
  • the controller controls the rear axle gearbox to switch from the current gear to neutral.
  • the rear axle gearbox controller controls the rear axle gearbox to shift from the current gear back to neutral. Specifically, it can send a corresponding instruction to the actuator of the rear axle gearbox, and the actuator executes the instruction, so that The rear axle gearbox is disengaged from the current gear to neutral.
  • New energy vehicles include a rear axle gearbox and a rear axle motor (that is, a P4 motor).
  • the power battery of the new energy vehicle supplies power to the rear axle motor, so that the rear axle motor outputs power.
  • the motor of the rear axle is an independent mechanism, and there is no need to consider the factors of the engine. Therefore, controlling the gearbox of the rear axle to switch to neutral can make the rear axle lose power.
  • This embodiment specifically detects whether the new energy vehicle has at least one of a rear axle gearbox overspeed fault, a collision accident, a high-voltage interlock fault, and a rear wheel lock fault by detecting whether a preset abnormal condition occurs in the new energy vehicle.
  • a gear-off control command is generated and sent to the rear axle gearbox controller; the gear-off control command is used to instruct the rear axle gearbox controller to control the rear axle gearbox Switching from the current gear to the neutral gear can trigger the new energy vehicle to disengage when an emergency abnormal situation occurs in the new energy vehicle, which can stop the new energy vehicle in time, prevent further vehicle accidents, and prevent the abnormal situation from becoming more serious. It can improve safety, protect hardware (for example, rear axle gearbox, etc.), avoid hardware damage, and improve the life of new energy vehicles.
  • the above S101 may include:
  • the preset condition is that the rotation speed of the rear axle gearbox is greater than the second preset rotation speed, and the duration of the rotation speed of the rear axle gearbox greater than the second preset rotation speed is longer than the preset duration; the first preset rotation speed is greater than the second preset rotation speed Rotating speed.
  • the new energy vehicle has an overspeed fault of the rear axle gearbox, and the new energy vehicle can be determined.
  • the vehicle has a preset abnormal situation; if the speed of the rear axle gearbox is not greater than the first preset speed, and the speed of the rear axle gearbox does not meet the preset conditions, it is determined that the new energy vehicle does not have an overspeed failure of the rear axle gearbox, but It is also necessary to detect whether the new energy vehicle has at least one of a collision accident, a high-voltage interlock failure and a rear wheel lock failure, so as to determine whether the new energy vehicle has a preset abnormal condition.
  • the first preset rotation speed, the second preset rotation speed and the preset duration can be set according to actual needs.
  • the first preset rotation speed may be 17500 rpm.
  • the speed of the rear axle gearbox usually has a reasonable speed range. Within this speed range, the rear axle gearbox is in a normal state and no damage will occur. When the speed of the rear axle gearbox is too high and exceeds this speed range, the rear axle gearbox may be abnormal, and if the speed is too high, the rear axle gearbox may be damaged, affecting the service life and durability of the rear axle gearbox.
  • the first preset rotating speed may be the highest value within the reasonable rotating speed range, and correspondingly, the second preset rotating speed may be a rotating speed value slightly lower than the highest value; or, the first preset rotating speed may be a higher value than the The rotation speed value is slightly higher than the highest value, correspondingly, the second preset rotation speed may be the highest value, and so on.
  • a gear-off control command is generated, and the gear-off control command is sent to the rear axle gearbox controller; the gear-off control command is used to instruct the rear axle gearbox controller to control the rear axle Switching the gearbox from the current gear to neutral can protect the rear axle gearbox and prevent it from being damaged during high-speed operation, which can improve the service life of the rear axle gearbox and improve the durability of the rear axle gearbox.
  • the above S101 may include:
  • Air Bag Module Air Bag Module, ABM
  • the ABM will only be triggered when the new energy vehicle has a serious collision accident, and the ABM can generate a collision signal and send it to the vehicle controller. Therefore, when the vehicle controller receives the collision signal sent by the ABM, it can determine that the new energy vehicle has a relatively serious collision accident, that is, it can determine that the new energy vehicle has a preset abnormal situation. If the collision signal sent by the ABM is not received, it is determined that the new energy vehicle has not had a relatively serious collision accident that requires emergency disengagement, but it is also necessary to detect whether the new energy vehicle has a rear axle gearbox overspeed fault, a high-voltage interlock fault, and a rear axle fault. At least one of the wheel lock failures can determine whether the new energy vehicle has a preset abnormal situation.
  • a gear-off control command is generated, and the gear-off control command is sent to the rear axle gearbox controller; the gear-off control command is used to instruct the rear axle gearbox controller to control the rear axle Switching the gearbox from the current gear to neutral can stop the vehicle in time to prevent further expansion of the collision accident, and the vehicle in neutral can be moved to a safe area to prevent secondary accidents without affecting the passage of other vehicles.
  • the above S101 may include:
  • BMS Battery Management System
  • the BMS can detect in real time whether a high-voltage interlock fault occurs, and if the BMS detects a high-voltage interlock fault, it can send a high-voltage interlock fault signal to the vehicle controller. Therefore, when the vehicle controller receives the high-voltage interlock fault signal sent by the BMS, it can determine that the new energy vehicle has a high-voltage interlock fault, that is, it can determine that the new energy vehicle has a preset abnormal situation.
  • the high-voltage interlock fault signal sent by the BMS is not received, it is determined that the new energy vehicle does not have a high-voltage interlock fault, but it is also necessary to detect whether the new energy vehicle has a rear axle gearbox overspeed fault, a collision accident, and a rear wheel lock fault. At least one of them can determine whether the new energy vehicle has a preset abnormal situation.
  • the high-voltage interlock circuit inside the new energy vehicle is abnormal at this time, which may cause problems with the power output of the motor, which may lead to accidents of the new energy vehicle. Therefore, in this embodiment, when receiving the high-voltage interlock fault signal sent by the BMS, a gear-off control command is generated, and the gear-off control command is sent to the rear axle gearbox controller; the gear-off control command is used to instruct the rear axle gearbox The controller controls the rear axle gearbox to switch from the current gear to neutral, which can avoid accidents that may be caused by high-voltage interlock failures.
  • the above S101 may include:
  • the front wheel speed of the new energy vehicle is greater than the first preset wheel speed threshold, the rear wheel speed of the new energy vehicle is less than the second preset wheel speed threshold and the speed of the new energy vehicle is greater than the preset speed threshold, then it is determined that the new energy The vehicle has a preset abnormal situation;
  • the first preset wheel speed threshold is greater than the second preset wheel speed threshold.
  • the front wheel speed can be the wheel speed of any front wheel, or the average wheel speed of the two front wheels.
  • the rear wheel speed can be the wheel speed of any rear wheel, or the average wheel speed of the two rear wheels.
  • the second preset wheel speed threshold is a wheel speed close to 0
  • the first preset wheel speed threshold is the same as the preset vehicle speed threshold Match the wheel speed value.
  • the first preset wheel speed threshold, the second preset wheel speed threshold and the preset vehicle speed threshold can be set according to actual needs, and no specific limitation is set here.
  • the new energy vehicle is running at a certain speed, but the wheel speed difference between the front and rear wheels of the new energy vehicle is large, the front wheels are running normally, and the rear wheels hardly rotate. Dead failure, so that it can be determined that the new energy vehicle has a preset abnormal situation.
  • the new energy vehicle does not have a rear wheel lock failure, but it is necessary to detect whether the new energy vehicle has at least one of the rear axle gearbox overspeed failure, collision accident and high-voltage interlock failure, in order to determine whether the new energy vehicle has occurred Default exception conditions.
  • the new energy vehicle has a preset abnormal situation, which may include:
  • the front wheel speed of the new energy vehicle is greater than the first preset wheel speed threshold, the rear wheel speed of the new energy vehicle is less than the second preset wheel speed threshold, the speed of the new energy vehicle is greater than the preset speed threshold and the P4 motor fault signal, it is determined that the new energy vehicle has a preset abnormal situation.
  • both the wheel speed and the vehicle speed are detected by the corresponding sensors, and the sensors are prone to malfunction, resulting in inaccurate detection results of the wheel speed or vehicle speed. For example, when the rear wheels are running normally, it may be detected that the rear wheel speed is 0. There may be a problem of wheel lock failure after a false alarm. Therefore, in order to improve the accuracy of rear wheel locking fault detection, this embodiment further accurately determines whether the rear wheel locking fault occurs by receiving the P4 motor fault signal.
  • the front wheel speed of the new energy vehicle is not greater than the first preset wheel speed threshold, or the rear wheel speed of the new energy vehicle is not less than the second preset wheel speed threshold, or the vehicle speed of the new energy vehicle is not greater than the preset speed threshold , or the P4 motor failure signal is not received, it is determined that the new energy vehicle has no rear wheel lock failure, but it is also necessary to detect whether the new energy vehicle has at least one of the rear axle gearbox overspeed failure, collision accident and high-voltage interlock failure In order to determine whether the new energy vehicle has a preset abnormal situation.
  • the P4 motor is a motor located on the rear axle. When the rear wheels are locked, the P4 motor will report a fault.
  • the P4 motor failure signal can be sent to the vehicle controller through the rear axle motor controller.
  • the most likely cause is an abnormality in the rear axle gearbox. Therefore, in this embodiment, when a rear wheel lock failure is detected on a new energy vehicle, a disengagement control command is generated, and the The off-gear control command is sent to the rear axle gearbox controller; the off-gear control command is used to instruct the rear axle gearbox controller to control the rear axle gearbox to switch from the current gear to neutral, which can prevent further damage to the rear axle gearbox, and also Accidents that may be caused by rear wheel locking failures can be avoided.
  • the rear axle of the new energy vehicle can be taken out of neutral in an emergency, taking into account the failure of the entire vehicle and the abnormal situation of the vehicle, providing safety intervention for the new energy vehicle, and improving the efficiency of the new energy vehicle.
  • the safety performance of the vehicle can prevent vehicle accidents, protect the life of the driver, and can also protect the internal components of new energy vehicles to prevent damage and improve the life of the vehicle.
  • FIG. 2 shows a schematic structural view of the new energy vehicle safety protection device provided by the embodiment of the present application.
  • the details are as follows:
  • New energy vehicles include rear axle gearboxes. As shown in FIG. 2 , the new energy vehicle safety protection device 30 includes: a detection module 31 and a control module 32 .
  • the detection module 31 is used to detect whether a preset abnormal condition occurs in the new energy vehicle;
  • the preset abnormal condition includes at least one of a rear axle gearbox overspeed fault, a collision accident, a high-voltage interlock fault and a rear wheel lock fault;
  • the control module 32 is used to generate a gear-off control command if it detects that a preset abnormal situation occurs in the new energy vehicle, and send the gear-off control command to the rear axle gearbox controller; the gear-off control command is used to instruct the rear axle to change gears
  • the gearbox controller controls the rear axle gearbox to switch from the current gear to neutral.
  • the detection module detects whether a preset abnormal condition occurs in the new energy vehicle, and specifically detects whether the new energy vehicle has at least one of a rear axle gearbox overspeed fault, a collision accident, a high-voltage interlock fault, and a rear wheel lock fault.
  • the control module when the control module detects that the new energy vehicle has a preset abnormal situation, generate a gear-off control command, and send the gear-off control command to the rear axle gearbox controller; the gear-off control command is used to instruct the rear axle gearbox control
  • the controller controls the rear axle gearbox to switch from the current gear to the neutral gear, which can trigger the new energy vehicle to disengage when the new energy vehicle is in an emergency and abnormal situation, and can stop the new energy vehicle in time to prevent further vehicle accidents and prevent the emergence of new energy vehicles. Conditions that make abnormal conditions more serious can improve safety.
  • the detection module 31 is specifically configured to:
  • the preset condition is that the rotation speed of the rear axle gearbox is greater than the second preset rotation speed, and the duration of the rotation speed of the rear axle gearbox greater than the second preset rotation speed is longer than the preset duration; the first preset rotation speed is greater than the second preset rotation speed Rotating speed.
  • the detection module 31 is specifically configured to:
  • the detection module 31 is specifically configured to:
  • the detection module 31 is specifically configured to:
  • the front wheel speed of the new energy vehicle is greater than the first preset wheel speed threshold, the rear wheel speed of the new energy vehicle is less than the second preset wheel speed threshold and the speed of the new energy vehicle is greater than the preset speed threshold, then it is determined that the new energy The vehicle has a preset abnormal situation;
  • the first preset wheel speed threshold is greater than the second preset wheel speed threshold.
  • the detection module 31 is specifically configured to:
  • the front wheel speed of the new energy vehicle is greater than the first preset wheel speed threshold, the rear wheel speed of the new energy vehicle is less than the second preset wheel speed threshold, the speed of the new energy vehicle is greater than the preset speed threshold and the P4 motor fault signal, it is determined that the new energy vehicle has a preset abnormal situation.
  • the embodiment of the present application also provides a computer program product, which has a program code, and the program code executes any one of the above-mentioned embodiments of the new energy vehicle safety protection method when running in a corresponding processor, controller, computing device or electronic equipment.
  • the steps in such as S101 to S102 shown in FIG. 1 .
  • Special purpose processors may include Application Specific Integrated Circuits (ASICs), Reduced Instruction Set Computers (RISCs), and/or Field Programmable Gate Arrays (FPGAs).
  • ASICs Application Specific Integrated Circuits
  • RISCs Reduced Instruction Set Computers
  • FPGAs Field Programmable Gate Arrays
  • the proposed methods and devices are preferably implemented as a combination of hardware and software.
  • the software is preferably installed as an application program on the program storage device. It is typically a computer platform based machine having hardware, such as one or more central processing units (CPUs), random access memory (RAM), and one or more input/output (I/O) interfaces.
  • An operating system is also typically installed on the computer platform. Various procedures and functions described herein may be part of the application program, or a part thereof may be executed by the operating system.
  • Fig. 3 is a schematic diagram of an electronic device provided by an embodiment of the present application.
  • the electronic device 4 of this embodiment includes: a processor 40 , a memory 41 , and a computer program 42 stored in the memory 41 and operable on the processor 40 .
  • the processor 40 executes the computer program 42, it realizes the steps in the above-mentioned embodiments of the new energy vehicle safety protection method, such as S101 to S102 shown in FIG. 1 .
  • the processor 40 executes the computer program 42, the functions of the modules/units in the above-mentioned device embodiments, such as the functions of the modules/units 31 to 32 shown in FIG. 2 , are realized.
  • the computer program 42 can be divided into one or more modules/units, and the one or more modules/units are stored in the memory 41 and executed by the processor 40 to complete / Implement the scheme provided by this application.
  • the one or more modules/units may be a series of computer program instruction segments capable of accomplishing specific functions, and the instruction segments are used to describe the execution process of the computer program 42 in the electronic device 4 .
  • the computer program 42 may be divided into the modules/units 31 to 32 shown in FIG. 2 .
  • the electronic device 4 may be a device such as a vehicle controller.
  • the electronic device 4 may include, but not limited to, a processor 40 and a memory 41 .
  • FIG. 3 is only an example of the electronic device 4, and does not constitute a limitation to the electronic device 4. It may include more or less components than shown in the figure, or combine certain components, or different components. , for example, the electronic device may also include an input and output device, a network access device, a bus, and the like.
  • the so-called processor 40 may be a central processing unit (Central Processing Unit, CPU), and may also be other general-purpose processors, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • the storage 41 may be an internal storage unit of the electronic device 4 , such as a hard disk or memory of the electronic device 4 .
  • the memory 41 can also be an external storage device of the electronic device 4, such as a plug-in hard disk equipped on the electronic device 4, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, flash memory card (Flash Card), etc.
  • the memory 41 may also include both an internal storage unit of the electronic device 4 and an external storage device.
  • the memory 41 is used to store the computer program and other programs and data required by the electronic device.
  • the memory 41 can also be used to temporarily store data that has been output or will be output.
  • an embodiment of the present application further provides a vehicle, including the above-mentioned electronic device, which has the same beneficial effects as the above-mentioned electronic device.
  • the disclosed device/electronic equipment and method can be implemented in other ways.
  • the device/electronic device embodiments described above are only illustrative.
  • the division of the modules or units is only a logical function division.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
  • the integrated module/unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments in the present application can also be completed by instructing related hardware through computer programs.
  • the computer programs can be stored in a computer-readable storage medium, and the computer When the program is executed by the processor, the steps in the above-mentioned embodiments of the new energy vehicle safety protection method can be realized.
  • the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form.
  • the computer-readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a removable hard disk, a magnetic disk, an optical disk, a computer memory, and a read-only memory (Read-Only Memory, ROM) , random access memory (Random Access Memory, RAM), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer-readable medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, computer-readable media Excluding electrical carrier signals and telecommunication signals.

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Abstract

本申请提供一种新能源车辆安全保护方法、装置、车辆及存储介质。新能源车辆包括后桥变速箱，新能源车辆安全保护方法包括：检测新能源车辆是否发生预设异常状况；预设异常状况包括后桥变速箱超速故障、碰撞事故、高压互锁故障和后车轮抱死故障中的至少一种；若检测到新能源车辆发生预设异常状况，则生成脱挡控制指令，并将脱挡控制指令发送至后桥变速箱控制器；脱挡控制指令用于指示后桥变速箱控制器控制后桥变速箱从当前挡位切换至空挡。本申请能够在新能源车辆发生紧急异常状况时，触发新能源车辆脱挡，能够使新能源车辆及时停止行驶，防止造成进一步的车辆事故，防止出现使异常状况更加严重的状况，能够提高安全性。

Description

新能源车辆安全保护方法、装置、车辆及存储介质
本专利申请要求于2021年12月29日提交的中国专利申请No.CN202111639030.3的优先权。在先申请的公开内容通过整体引用并入本申请。
技术领域
本申请涉及新能源车辆技术领域，尤其涉及一种新能源车辆安全保护方法、装置、车辆及存储介质。
 背景技术
新能源车辆通常采用非常规的车用燃料作为动力来源，或者，使用常规的车用燃料，采用新型车载动力装置。新能源车辆包括混合动力车辆、纯电动车辆、燃料电池电动车辆以及其他新能源车辆等。
目前，当新能源车辆发生异常状况时，通常采用限制扭矩的方法对车辆进行紧急控制。然而，限制扭矩的方法需要一定的时间才能让车辆停止行驶，在这段时间内，可能会使异常状况更加严重，安全性较差。
 技术问题
本申请提供了一种新能源车辆安全保护方法、装置、车辆及存储介质，以解决现有技术可能会使异常状况更加严重，安全性较差的问题。
 技术解决方案
第一方面，本申请提供了一种新能源车辆安全保护方法，新能源车辆包括后桥变速箱，新能源车辆安全保护方法包括：
检测新能源车辆是否发生预设异常状况；预设异常状况包括后桥变速箱超速故障、碰撞事故、高压互锁故障和后车轮抱死故障中的至少一种；
若检测到新能源车辆发生预设异常状况，则生成脱挡控制指令，并将脱挡控制指令发送至后桥变速箱控制器；脱挡控制指令用于指示后桥变速箱控制器控制后桥变速箱从当前挡位切换至空挡。
在一种可能的实现方式中，检测新能源车辆是否发生预设异常状况，包括：
获取后桥变速箱的转速；
若后桥变速箱的转速大于第一预设转速，或后桥变速箱的转速满足预设条件，则确定新能源车辆发生预设异常状况；
其中，预设条件为后桥变速箱的转速大于第二预设转速，且后桥变速箱的转速大于第二预设转速的持续时长大于预设时长；第一预设转速大于第二预设转速。
在一种可能的实现方式中，检测新能源车辆是否发生预设异常状况，包括：
若接收到新能源车辆的安全气囊模块发送的碰撞信号，则确定新能源车辆发生预设异常状况。
在一种可能的实现方式中，检测新能源车辆是否发生预设异常状况，包括：
若接收到新能源车辆的电池管理系统发送的高压互锁故障信号，则确定新能源车辆发生预设异常状况。
在一种可能的实现方式中，检测新能源车辆是否发生预设异常状况，包括：
获取新能源车辆的前轮轮速、新能源车辆的后轮轮速和新能源车辆的车速；
若新能源车辆的前轮轮速大于第一预设轮速阈值、新能源车辆的后轮轮速小于第二预设轮速阈值且新能源车辆的车速大于预设车速阈值，则确定新能源车辆发生预设异常状况；
其中，第一预设轮速阈值大于第二预设轮速阈值。
在一种可能的实现方式中，若新能源车辆的前轮轮速大于第一预设轮速阈值、新能源车辆的后轮轮速小于第二预设轮速阈值且新能源车辆的车速大于预设车速阈值，则确定新能源车辆发生预设异常状况，包括：
若新能源车辆的前轮轮速大于第一预设轮速阈值、新能源车辆的后轮轮速小于第二预设轮速阈值、新能源车辆的车速大于预设车速阈值且接收到P4电机故障信号，则确定新能源车辆发生预设异常状况。
第二方面，本申请提供了一种新能源车辆安全保护装置，新能源车辆包括后桥变速箱，新能源车辆安全保护装置包括：
检测模块，用于检测新能源车辆是否发生预设异常状况；预设异常状况包括后桥变速箱超速故障、碰撞事故、高压互锁故障和后车轮抱死故障中的至少一种；
控制模块，用于若检测到新能源车辆发生预设异常状况，则生成脱挡控制指令，并将脱挡控制指令发送至后桥变速箱控制器；脱挡控制指令用于指示后桥变速箱控制器控制后桥变速箱从当前挡位切换至空挡。
在一种可能的实现方式中，检测模块具体用于：
获取后桥变速箱的转速；
若后桥变速箱的转速大于第一预设转速，或后桥变速箱的转速满足预设条件，则确定新能源车辆发生预设异常状况；
其中，预设条件为后桥变速箱的转速大于第二预设转速，且后桥变速箱的转速大于第二预设转速的持续时长大于预设时长；第一预设转速大于第二预设转速。
在一种可能的实现方式中，检测模块具体用于：
若接收到新能源车辆的安全气囊模块发送的碰撞信号，则确定新能源车辆发生预设异常状况。
在一种可能的实现方式中，检测模块具体用于：
若接收到新能源车辆的电池管理系统发送的高压互锁故障信号，则确定新能源车辆发生预设异常状况。
在一种可能的实现方式中，检测模块具体用于：
获取新能源车辆的前轮轮速、新能源车辆的后轮轮速和新能源车辆的车速；
若新能源车辆的前轮轮速大于第一预设轮速阈值、新能源车辆的后轮轮速小于第二预设轮速阈值且新能源车辆的车速大于预设车速阈值，则确定新能源车辆发生预设异常状况；
其中，第一预设轮速阈值大于第二预设轮速阈值。
在一种可能的实现方式中，检测模块具体用于：
若新能源车辆的前轮轮速大于第一预设轮速阈值、新能源车辆的后轮轮速小于第二预设轮速阈值、新能源车辆的车速大于预设车速阈值且接收到P4电机故障信号，则确定新能源车辆发生预设异常状况。
第三方面，本申请提供了一种电子设备，包括存储器、处理器以及存储在所述存储器中并可在所述处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现如上第一方面或第一方面的任一种可能的实现方式所述新能源车辆安全保护方法的步骤。
第四方面，本申请实施例提供了一种车辆，包括如第三方面所述的电子设备。
第五方面，本申请实施例提供了一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序，所述计算机程序被处理器执行时实现如上第一方面或第一方面的任一种可能的实现方式所述新能源车辆安全保护方法的步骤。
 有益效果
本申请实施例提供一种新能源车辆安全保护方法、装置、车辆及存储介质，通过检测新能源车辆是否发生预设异常状况，具体检测车辆是否发生后桥变速箱超速故障、碰撞事故、高压互锁故障和后车轮抱死故障中的至少一种，若检测到新能源车辆发生预设异常状况，则生成脱挡控制指令，并将脱挡控制指令发送至后桥变速箱控制器；脱挡控制指令用于指示后桥变速箱控制器控制后桥变速箱从当前挡位切换至空挡，能够在新能源车辆发生紧急异常状况时，触发新能源车辆脱挡，能够使新能源车辆及时停止行驶，防止造成进一步的车辆事故，防止出现使异常状况更加严重的状况，能够提高安全性。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例提供的新能源车辆安全保护方法的实现流程图；
图2是本申请实施例提供的新能源车辆安全保护装置的结构示意图；
图3是本申请实施例提供的电子设备的示意图。
本申请的实施方式
以下描述中，为了说明而不是为了限定，提出了诸如特定系统结构、技术之类的具体细节，以便透彻理解本申请实施例。然而，本领域的技术人员应当清楚，在没有这些具体细节的其它实施例中也可以实现本申请。在其它情况中，省略对众所周知的系统、装置、电路以及方法的详细说明，以免不必要的细节妨碍本申请的描述。
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图通过具体实施例来进行说明。
参见图1，其示出了本申请实施例提供的新能源车辆安全保护方法的实现流程图，该方法的执行主体可以是电子设备，该电子设备可以为车辆的整车控制器。
上述新能源车辆包括后桥变速箱，该方法详述如下：
在S101中，检测新能源车辆是否发生预设异常状况；预设异常状况包括后桥变速箱超速故障、碰撞事故、高压互锁故障和后车轮抱死故障中的至少一种。
其中，预设异常状况是指危险等级比较高的异常状况。
在本实施例中，若车辆发生后桥变速箱超速故障、碰撞事故、高压互锁故障和后车轮抱死故障中的至少一种，则确定车辆发生预设异常状况；若车辆未发生后桥变速箱超速故障、碰撞事故、高压互锁故障或后车轮抱死故障，则确定车辆未发生预设异常状况。
预设异常状况除了可以包括后桥变速箱超速故障、碰撞事故、高压互锁故障和后车轮抱死故障中的至少一种，还可以包括其他危险等级较高的异常状况，在此不做具体限制。
后桥变速箱超速故障是指车辆的后桥变速箱的转速过高。
碰撞事故是指车辆与其他车辆或其他事物等发生碰撞，是比较严重的碰撞事故。
高压互锁故障是新能源车辆的常见故障。车辆的高压部件（及其接插件）都应具有高压互锁装置。高压互锁的作用是使用12V的小电流来确认整个高压电气系统的完整性，整车所有的高压部件和线束接插件都必须安装到位，确保无短路或断路的情况。当检测到高压互锁回路断开或是完整性受到破坏时，确认发生高压互锁故障。
后车轮抱死故障可以指车辆的后车轮发生抱死故障，即在制动过程中，后车轮由于制动力矩的作用，停止转动，在路面上拖滑。
在S102中，若检测到新能源车辆发生预设异常状况，则生成脱挡控制指令，并将脱挡控制指令发送至后桥变速箱控制器；脱挡控制指令用于指示后桥变速箱控制器控制后桥变速箱从当前挡位切换至空挡。
在本实施例中，若检测到车辆发生预设异常状况，则触发紧急脱挡请求，生成脱挡控制指令，并将脱挡控制指令发送至后桥变速箱控制器。后桥变速箱控制器在接收到脱挡控制指令后，控制后桥变速箱从当前挡位脱回空挡，具体可以是发送相应指令至后桥变速箱的执行机构，执行机构执行该指令，使后桥变速箱从当前挡位脱回空挡。
新能源车辆包括后桥变速箱和后桥电机（即P4电机）。新能源车辆的动力电池为后桥电机供电，从而使后桥电机输出动力。后桥电机为独立机构，无需考虑发动机的因素，因此，控制后桥变速箱切换至空挡，可以使后桥失去动力。
本实施例通过检测新能源车辆是否发生预设异常状况，具体检测新能源车辆是否发生后桥变速箱超速故障、碰撞事故、高压互锁故障和后车轮抱死故障中的至少一种，若检测到新能源车辆发生预设异常状况，则生成脱挡控制指令，并将脱挡控制指令发送至后桥变速箱控制器；脱挡控制指令用于指示后桥变速箱控制器控制后桥变速箱从当前挡位切换至空挡，能够在新能源车辆发生紧急异常状况时，触发新能源车辆脱挡，能够使新能源车辆及时停止行驶，防止造成进一步的车辆事故，防止出现使异常状况更加严重的状况，能够提高安全性，还可以保护硬件（例如，后桥变速箱等），避免硬件损伤，提高新能源车辆寿命。
在一些实施例中，上述S101可以包括：
获取后桥变速箱的转速；
若后桥变速箱的转速大于第一预设转速，或后桥变速箱的转速满足预设条件，则确定新能源车辆发生预设异常状况；
其中，预设条件为后桥变速箱的转速大于第二预设转速，且后桥变速箱的转速大于第二预设转速的持续时长大于预设时长；第一预设转速大于第二预设转速。
在本实施例中，若后桥变速箱的转速大于第一预设转速，或后桥变速箱的转速满足预设条件，则确定新能源车辆发生后桥变速箱超速故障，即可确定新能源车辆发生预设异常状况；若后桥变速箱的转速不大于第一预设转速，且后桥变速箱的转速不满足预设条件，则确定新能源车辆未发生后桥变速箱超速故障，但还要检测新能源车辆是否发生碰撞事故、高压互锁故障和后车轮抱死故障中的至少一种，才能确定新能源车辆是否发生预设异常状况。
其中，第一预设转速、第二预设转速和预设时长可以根据实际需求进行设置。在一种可能的实现方式中，第一预设转速可以为17500转/分钟。
后桥变速箱的转速通常有一个合理的转速范围，在该转速范围内，后桥变速箱处于正常状态，不会发生损坏等。当后桥变速箱的转速过高，超出该转速范围时，后桥变速箱可能出现异常，且转速过高可能会使后桥变速箱发生损坏，影响后桥变速箱的使用寿命和耐久性。其中，第一预设转速可以是该合理的转速范围内的最高值，相应的，第二预设转速可以是比该最高值稍低的转速值；或者，第一预设转速可以是比该最高值稍高的转速值，相应的，第二预设转速可以是该最高值，等等。
本实施例在发生后桥变速箱超速故障时，生成脱挡控制指令，并将脱挡控制指令发送至后桥变速箱控制器；脱挡控制指令用于指示后桥变速箱控制器控制后桥变速箱从当前挡位切换至空挡，可以保护后桥变速箱，防止其在高速运转过程中，发生损坏，能够提高后桥变速箱的使用寿命，提升后桥变速箱的耐久性。
在一些实施例中，上述S101可以包括：
若接收到新能源车辆的安全气囊模块（Air Bag Module，ABM）发送的碰撞信号，则确定新能源车辆发生预设异常状况。
在本实施例中，当新能源车辆发生较为严重的碰撞事故时，才会触发ABM，ABM可以生成碰撞信号，并发送至整车控制器。因此，当整车控制器接收到ABM发送的碰撞信号时，可以确定新能源车辆发生较为严重的碰撞事故，即可确定新能源车辆发生预设异常状况。若未接收到ABM发送的碰撞信号，则确定新能源车辆未发生需要紧急脱挡的较为严重的碰撞事故，但还要检测新能源车辆是否发生后桥变速箱超速故障、高压互锁故障和后车轮抱死故障中的至少一种，才能确定新能源车辆是否发生预设异常状况。
当发生较为严重的碰撞事故时，若后桥变速箱仍在挡位中，即不是空挡，则此时车辆还会继续向前行驶，可能会使事故进一步扩大；另外，当发生较为严重的碰撞事故时，若后桥变速箱仍在挡位中，即不是空挡，此时，后桥变速箱内部的换挡拨叉或齿轮等可能被卡住，导致车辆无法被推动，车辆无法移动至安全区域，容易发生二次事故，且影响其他车辆通行。
本实施例在接收到ABM发送的碰撞信号时，生成脱挡控制指令，并将脱挡控制指令发送至后桥变速箱控制器；脱挡控制指令用于指示后桥变速箱控制器控制后桥变速箱从当前挡位切换至空挡，可以使车辆及时停止行驶，防止碰撞事故进一步扩大，并且处于空挡的车辆可以被移动至安全区域，防止发生二次事故，且不影响其他车辆通行。
在一些实施例中，上述S101可以包括：
若接收到新能源车辆的电池管理系统（Battery Management System，BMS）发送的高压互锁故障信号，则确定新能源车辆发生预设异常状况。
在本实施例中，BMS可以实时检测是否发生高压互锁故障，若BMS检测到高压互锁故障，则可以向整车控制器发送高压互锁故障信号。因此，当整车控制器接收到BMS发送的高压互锁故障信号时，可以确定新能源车辆发生高压互锁故障，即可确定新能源车辆发生预设异常状况。若未接收到BMS发送的高压互锁故障信号，则确定新能源车辆未发生高压互锁故障，但还要检测新能源车辆是否发生后桥变速箱超速故障、碰撞事故和后车轮抱死故障中的至少一种，才能确定新能源车辆是否发生预设异常状况。
当检测到新能源车辆发生高压互锁故障时，此时新能源车辆内部的高压互锁回路出现异常，可能造成电机的动力输出出现问题，进而导致新能源车辆发生意外事故。因此，本实施例在接收到BMS发送的高压互锁故障信号时，生成脱挡控制指令，并将脱挡控制指令发送至后桥变速箱控制器；脱挡控制指令用于指示后桥变速箱控制器控制后桥变速箱从当前挡位切换至空挡，可以避免高压互锁故障可能导致的意外事故发生。
在一些实施例中，上述S101可以包括：
获取新能源车辆的前轮轮速、新能源车辆的后轮轮速和新能源车辆的车速；
若新能源车辆的前轮轮速大于第一预设轮速阈值、新能源车辆的后轮轮速小于第二预设轮速阈值且新能源车辆的车速大于预设车速阈值，则确定新能源车辆发生预设异常状况；
其中，第一预设轮速阈值大于第二预设轮速阈值。
前轮轮速可以是任意一个前轮的轮速，也可以是两个前轮的平均轮速。后轮轮速可以是任意一个后轮的轮速，也可以是两个后轮的平均轮速。
第一预设轮速阈值与第二预设轮速阈值之间相差较大，第二预设轮速阈值为一个接近0的轮速值，第一预设轮速阈值为与预设车速阈值相匹配的轮速值。第一预设轮速阈值、第二预设轮速阈值和预设车速阈值可以根据实际需求设置，在此不做具体限制。
若新能源车辆的前轮轮速大于第一预设轮速阈值，且新能源车辆的后轮轮速小于第二预设轮速阈值，且新能源车辆的车速大于预设车速阈值，即新能源车辆在一定车速下行驶，但新能源车辆的前后轮之间的轮速相差较大，前轮正常运转，后轮几乎不转，此时可以确定后车轮抱死，即确定发生后车轮抱死故障，从而可以确定新能源车辆发生预设异常状况。若新能源车辆的前轮轮速不大于第一预设轮速阈值，或新能源车辆的后轮轮速不小于第二预设轮速阈值，或新能源车辆的车速不大于预设车速阈值，则确定新能源车辆未发生后车轮抱死故障，但还要检测新能源车辆是否发生后桥变速箱超速故障、碰撞事故和高压互锁故障中的至少一种，才能确定新能源车辆是否发生预设异常状况。
在一些实施例中，若新能源车辆的前轮轮速大于第一预设轮速阈值、新能源车辆的后轮轮速小于第二预设轮速阈值且新能源车辆的车速大于预设车速阈值，则确定新能源车辆发生预设异常状况，可以包括：
若新能源车辆的前轮轮速大于第一预设轮速阈值、新能源车辆的后轮轮速小于第二预设轮速阈值、新能源车辆的车速大于预设车速阈值且接收到P4电机故障信号，则确定新能源车辆发生预设异常状况。
由于轮速和车速均是通过对应的传感器检测得到，而传感器容易发生故障，导致轮速或车速的检测结果不准确，比如，当后轮正常运转时，可能检测到后轮轮速为0，可能出现误报后车轮抱死故障的问题。因此，为了提高后车轮抱死故障检测的准确性，本实施例进一步通过是否接收到P4电机故障信号来精准确定是否发生后车轮抱死故障。
当新能源车辆的前轮轮速大于第一预设轮速阈值，且新能源车辆的后轮轮速小于第二预设轮速阈值，且新能源车辆的车速大于预设车速阈值，且接收到P4电机故障信号，则确定后车轮抱死，确定新能源车辆发生后车轮抱死故障，即可确定新能源车辆发生预设异常状况。若新能源车辆的前轮轮速不大于第一预设轮速阈值，或新能源车辆的后轮轮速不小于第二预设轮速阈值，或新能源车辆的车速不大于预设车速阈值，或未接收到P4电机故障信号，则确定新能源车辆未发生后车轮抱死故障，但还要检测新能源车辆是否发生后桥变速箱超速故障、碰撞事故和高压互锁故障中的至少一种，才能确定新能源车辆是否发生预设异常状况。
P4电机是位于后桥上的电机，当后车轮抱死时，P4电机会上报故障。可以通过后桥电机控制器将P4电机故障信号发送至整车控制器。
当新能源车辆发生后车轮抱死故障时，最可能的原因是后桥变速箱出现异常，因此本实施例在检测到新能源车辆发生后车轮抱死故障时，生成脱挡控制指令，并将脱挡控制指令发送至后桥变速箱控制器；脱挡控制指令用于指示后桥变速箱控制器控制后桥变速箱从当前挡位切换至空挡，可以防止后桥变速箱发生进一步损坏，还可以避免后车轮抱死故障可能导致的意外事故发生。
本实施例可以在新能源车辆发生紧急情况时，对新能源车辆后桥进行紧急脱空挡，考虑了整车发生的故障及车辆异常情况，为新能源车辆提供安全性的干预，能够提高新能源车辆的安全性能，防止造成车辆事故，保护驾驶员的生命安全，还可以保护新能源车辆内部零部件，防止其发生损坏，能够提升整车寿命。
应理解，上述实施例中各步骤的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
以下为本申请的装置实施例，对于其中未详尽描述的细节，可以参考上述对应的方法实施例。
图2示出了本申请实施例提供的新能源车辆安全保护装置的结构示意图，为了便于说明，仅示出了与本申请实施例相关的部分，详述如下：
新能源车辆包括后桥变速箱。如图2所示，新能源车辆安全保护装置30包括：检测模块31和控制模块32。
检测模块31，用于检测新能源车辆是否发生预设异常状况；预设异常状况包括后桥变速箱超速故障、碰撞事故、高压互锁故障和后车轮抱死故障中的至少一种；
控制模块32，用于若检测到新能源车辆发生预设异常状况，则生成脱挡控制指令，并将脱挡控制指令发送至后桥变速箱控制器；脱挡控制指令用于指示后桥变速箱控制器控制后桥变速箱从当前挡位切换至空挡。
本申请实施例通过检测模块检测新能源车辆是否发生预设异常状况，具体检测新能源车辆是否发生后桥变速箱超速故障、碰撞事故、高压互锁故障和后车轮抱死故障中的至少一种，通过控制模块在检测到新能源车辆发生预设异常状况时，生成脱挡控制指令，并将脱挡控制指令发送至后桥变速箱控制器；脱挡控制指令用于指示后桥变速箱控制器控制后桥变速箱从当前挡位切换至空挡，能够在新能源车辆发生紧急异常状况时，触发新能源车辆脱挡，能够使新能源车辆及时停止行驶，防止造成进一步的车辆事故，防止出现使异常状况更加严重的状况，能够提高安全性。
在一种可能的实现方式中，检测模块31具体用于：
获取后桥变速箱的转速；
若后桥变速箱的转速大于第一预设转速，或后桥变速箱的转速满足预设条件，则确定新能源车辆发生预设异常状况；
其中，预设条件为后桥变速箱的转速大于第二预设转速，且后桥变速箱的转速大于第二预设转速的持续时长大于预设时长；第一预设转速大于第二预设转速。
在一种可能的实现方式中，检测模块31具体用于：
若接收到新能源车辆的安全气囊模块发送的碰撞信号，则确定新能源车辆发生预设异常状况。
在一种可能的实现方式中，检测模块31具体用于：
若接收到新能源车辆的电池管理系统发送的高压互锁故障信号，则确定新能源车辆发生预设异常状况。
在一种可能的实现方式中，检测模块31具体用于：
获取新能源车辆的前轮轮速、新能源车辆的后轮轮速和新能源车辆的车速；
若新能源车辆的前轮轮速大于第一预设轮速阈值、新能源车辆的后轮轮速小于第二预设轮速阈值且新能源车辆的车速大于预设车速阈值，则确定新能源车辆发生预设异常状况；
其中，第一预设轮速阈值大于第二预设轮速阈值。
在一种可能的实现方式中，检测模块31具体用于：
若新能源车辆的前轮轮速大于第一预设轮速阈值、新能源车辆的后轮轮速小于第二预设轮速阈值、新能源车辆的车速大于预设车速阈值且接收到P4电机故障信号，则确定新能源车辆发生预设异常状况。
本申请实施例还提供了一种计算机程序产品，其具有程序代码，该程序代码在相应的处理器、控制器、计算装置或电子设备中运行时执行上述任一个新能源车辆安全保护方法实施例中的步骤，例如图1所示的S101至S102。本领域技术人员应当理解，可以以硬件、软件、固件、专用处理器或其组合的各种形式来实现本申请实施例所提出的方法和所属的设备。专用处理器可以包括专用集成电路(ASIC)、精简指令集计算机(RISC)和/或现场可编程门阵列(FPGA)。所提出的方法和设备优选地被实现为硬件和软件的组合。该软件优选地作为应用程序安装在程序存储设备上。其典型地是基于具有硬件的计算机平台的机器，例如一个或多个中央处理器（CPU)、随机存取存储器(RAM)和一个或多个输入/输出（I/O)接口。操作系统典型地也安装在所述计算机平台上。这里描述的各种过程和功能可以是应用程序的一部分，或者其一部分可以通过操作系统执行。
图3是本申请实施例提供的电子设备的示意图。如图3所示，该实施例的电子设备4包括：处理器40、存储器41以及存储在所述存储器41中并可在所述处理器40上运行的计算机程序42。所述处理器40执行所述计算机程序42时实现上述各个新能源车辆安全保护方法实施例中的步骤，例如图1所示的S101至S102。或者，所述处理器40执行所述计算机程序42时实现上述各装置实施例中各模块/单元的功能，例如图2所示模块/单元31至32的功能。
示例性的，所述计算机程序42可以被分割成一个或多个模块/单元，所述一个或者多个模块/单元被存储在所述存储器41中，并由所述处理器40执行，以完成/实施本申请所提供的方案。所述一个或多个模块/单元可以是能够完成特定功能的一系列计算机程序指令段，该指令段用于描述所述计算机程序42在所述电子设备4中的执行过程。例如，所述计算机程序42可以被分割成图2所示的模块/单元31至32。
所述电子设备4可以是整车控制器等设备。所述电子设备4可包括，但不仅限于，处理器40、存储器41。本领域技术人员可以理解，图3仅仅是电子设备4的示例，并不构成对电子设备4的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件，例如所述电子设备还可以包括输入输出设备、网络接入设备、总线等。
所称处理器40可以是中央处理单元(Central Processing Unit，CPU)，还可以是其他通用处理器、数字信号处理器 (Digital Signal Processor，DSP)、专用集成电路 (Application Specific Integrated Circuit，ASIC)、现场可编程门阵列 (Field-Programmable Gate Array，FPGA) 或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
所述存储器41可以是所述电子设备4的内部存储单元，例如电子设备4的硬盘或内存。所述存储器41也可以是所述电子设备4的外部存储设备，例如所述电子设备4上配备的插接式硬盘，智能存储卡（Smart Media Card，SMC），安全数字（Secure Digital，SD）卡，闪存卡（Flash Card）等。进一步地，所述存储器41还可以既包括所述电子设备4的内部存储单元也包括外部存储设备。所述存储器41用于存储所述计算机程序以及所述电子设备所需的其他程序和数据。所述存储器41还可以用于暂时地存储已经输出或者将要输出的数据。
对应于上述电子设备，本申请实施例还提供了一种车辆，包括上述电子设备，具有与上述电子设备同样的有益效果。
所属领域的技术人员可以清楚地了解到，为了描述的方便和简洁，仅以上述各功能单元、模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能单元、模块完成，即将所述装置的内部结构划分成不同的功能单元或模块，以完成以上描述的全部或者部分功能。实施例中的各功能单元、模块可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中，上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。另外，各功能单元、模块的具体名称也只是为了便于相互区分，并不用于限制本申请的保护范围。上述系统中单元、模块的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述或记载的部分，可以参见其它实施例的相关描述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
在本申请所提供的实施例中，应该理解到，所揭露的装置/电子设备和方法，可以通过其它的方式实现。例如，以上所描述的装置/电子设备实施例仅仅是示意性的，例如，所述模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通讯连接可以是通过一些接口，装置或单元的间接耦合或通讯连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的模块/单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请实现上述实施例方法中的全部或部分流程，也可以通过计算机程序来指令相关的硬件来完成，所述的计算机程序可存储于一计算机可读存储介质中，该计算机程序在被处理器执行时，可实现上述各个新能源车辆安全保护方法实施例的步骤。其中，所述计算机程序包括计算机程序代码，所述计算机程序代码可以为源代码形式、对象代码形式、可执行文件或某些中间形式等。所述计算机可读介质可以包括：能够携带所述计算机程序代码的任何实体或装置、记录介质、U盘、移动硬盘、磁碟、光盘、计算机存储器、只读存储器（Read-Only Memory，ROM）、随机存取存储器（Random Access Memory，RAM）、电载波信号、电信信号以及软件分发介质等。需要说明的是，所述计算机可读介质包含的内容可以根据司法管辖区内立法和专利实践的要求进行适当的增减，例如在某些司法管辖区，根据立法和专利实践，计算机可读介质不包括是电载波信号和电信信号。
此外，本申请附图中示出的实施例或本说明书中提到的各种实施例的特征不必理解为彼此独立的实施例。而是，可以将一个实施例的其中一个示例中描述的每个特征与来自其他实施例的一个或多个其他期望的特征组合，从而产生未用文字或参考附图描述的其他实施例。
以上所述实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围，均应包含在本申请的保护范围之内。

Claims (15)

  1. 一种新能源车辆安全保护方法，其特征在于，所述新能源车辆包括后桥变速箱，所述新能源车辆安全保护方法包括：
    检测所述新能源车辆是否发生预设异常状况；所述预设异常状况包括后桥变速箱超速故障、碰撞事故、高压互锁故障和后车轮抱死故障中的至少一种；
    若检测到所述新能源车辆发生所述预设异常状况，则生成脱挡控制指令，并将所述脱挡控制指令发送至后桥变速箱控制器；所述脱挡控制指令用于指示所述后桥变速箱控制器控制所述后桥变速箱从当前挡位切换至空挡。
  2. 根据权利要求1所述的新能源车辆安全保护方法，其特征在于，所述检测所述新能源车辆是否发生预设异常状况，包括：
    获取所述后桥变速箱的转速；
    若所述后桥变速箱的转速大于第一预设转速，或所述后桥变速箱的转速满足预设条件，则确定所述新能源车辆发生所述预设异常状况；
    其中，所述预设条件为所述后桥变速箱的转速大于第二预设转速，且所述后桥变速箱的转速大于所述第二预设转速的持续时长大于预设时长；所述第一预设转速大于所述第二预设转速。
  3. 根据权利要求1所述的新能源车辆安全保护方法，其特征在于，所述检测所述新能源车辆是否发生预设异常状况，包括：
    若接收到所述新能源车辆的安全气囊模块发送的碰撞信号，则确定所述新能源车辆发生所述预设异常状况。
  4. 根据权利要求1所述的新能源车辆安全保护方法，其特征在于，所述检测所述新能源车辆是否发生预设异常状况，包括：
    若接收到所述新能源车辆的电池管理系统发送的高压互锁故障信号，则确定所述新能源车辆发生所述预设异常状况。
  5. 根据权利要求1所述的新能源车辆安全保护方法，其特征在于，所述检测所述新能源车辆是否发生预设异常状况，包括：
    获取所述新能源车辆的前轮轮速、所述新能源车辆的后轮轮速和所述新能源车辆的车速；
    若所述新能源车辆的前轮轮速大于第一预设轮速阈值、所述新能源车辆的后轮轮速小于第二预设轮速阈值且所述新能源车辆的车速大于预设车速阈值，则确定所述新能源车辆发生所述预设异常状况；
    其中，所述第一预设轮速阈值大于所述第二预设轮速阈值。
  6. 根据权利要求5所述的新能源车辆安全保护方法，其特征在于，所述若所述新能源车辆的前轮轮速大于第一预设轮速阈值、所述新能源车辆的后轮轮速小于第二预设轮速阈值且所述新能源车辆的车速大于预设车速阈值，则确定所述新能源车辆发生所述预设异常状况，包括：
    若所述新能源车辆的前轮轮速大于所述第一预设轮速阈值、所述新能源车辆的后轮轮速小于所述第二预设轮速阈值、所述新能源车辆的车速大于所述预设车速阈值且接收到P4电机故障信号，则确定所述新能源车辆发生所述预设异常状况。
  7. 一种新能源车辆安全保护装置，其特征在于，所述新能源车辆包括后桥变速箱，所述新能源车辆安全保护装置包括：
    检测模块，用于检测所述新能源车辆是否发生预设异常状况；所述预设异常状况包括后桥变速箱超速故障、碰撞事故、高压互锁故障和后车轮抱死故障中的至少一种；
    控制模块，用于若检测到所述新能源车辆发生所述预设异常状况，则生成脱挡控制指令，并将所述脱挡控制指令发送至后桥变速箱控制器；所述脱挡控制指令用于指示所述后桥变速箱控制器控制所述后桥变速箱从当前挡位切换至空挡。
  8. 根据权利要求7所述的新能源车辆安全保护装置，其特征在于，所述检测模块具体用于：
    获取所述后桥变速箱的转速；
    若所述后桥变速箱的转速大于第一预设转速，或所述后桥变速箱的转速满足预设条件，则确定所述新能源车辆发生所述预设异常状况；
    其中，所述预设条件为所述后桥变速箱的转速大于第二预设转速，且所述后桥变速箱的转速大于所述第二预设转速的持续时长大于预设时长；所述第一预设转速大于所述第二预设转速。
  9. 根据权利要求7所述的新能源车辆安全保护装置，其特征在于，所述检测模块具体用于：
    若接收到所述新能源车辆的安全气囊模块发送的碰撞信号，则确定所述新能源车辆发生所述预设异常状况。
  10. 根据权利要求7所述的新能源车辆安全保护装置，其特征在于，所述检测模块具体用于：
    若接收到所述新能源车辆的电池管理系统发送的高压互锁故障信号，则确定所述新能源车辆发生所述预设异常状况。
  11. 根据权利要求7所述的新能源车辆安全保护装置，其特征在于，所述检测模块具体用于：
    获取所述新能源车辆的前轮轮速、所述新能源车辆的后轮轮速和所述新能源车辆的车速；
    若所述新能源车辆的前轮轮速大于第一预设轮速阈值、所述新能源车辆的后轮轮速小于第二预设轮速阈值且所述新能源车辆的车速大于预设车速阈值，则确定所述新能源车辆发生所述预设异常状况；
    其中，所述第一预设轮速阈值大于所述第二预设轮速阈值。
  12. 根据权利要求11所述的新能源车辆安全保护装置，其特征在于，所述检测模块具体用于：
    若所述新能源车辆的前轮轮速大于所述第一预设轮速阈值、所述新能源车辆的后轮轮速小于所述第二预设轮速阈值、所述新能源车辆的车速大于所述预设车速阈值且接收到P4电机故障信号，则确定所述新能源车辆发生所述预设异常状况。
  13. 一种电子设备，包括存储器、处理器以及存储在所述存储器中并可在所述处理器上运行的计算机程序，其特征在于，所述处理器执行所述计算机程序时实现如上的权利要求1至6中任一项所述新能源车辆安全保护方法的步骤。
  14. 一种车辆，其特征在于，包括如权利要求13所述的电子设备。
  15. 一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序，其特征在于，所述计算机程序被处理器执行时实现如上的权利要求1至6中任一项所述新能源车辆安全保护方法的步骤。
PCT/CN2022/140229 2021-12-29 2022-12-20 新能源车辆安全保护方法、装置、车辆及存储介质 WO2023125127A1 (zh)

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