CN114379538B - Control method and device for vehicle limp mode, vehicle and storage medium - Google Patents
Control method and device for vehicle limp mode, vehicle and storage medium Download PDFInfo
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- CN114379538B CN114379538B CN202210115748.0A CN202210115748A CN114379538B CN 114379538 B CN114379538 B CN 114379538B CN 202210115748 A CN202210115748 A CN 202210115748A CN 114379538 B CN114379538 B CN 114379538B
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- 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
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/50—Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
-
- 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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
-
- 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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/24—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
- B60W10/26—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
-
- 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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18063—Creeping
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- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Automation & Control Theory (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
The application discloses a control method and device for a vehicle limp mode, a vehicle and a storage medium. The method comprises the following steps: acquiring message information sent by a power battery in real time, wherein the message information comprises the residual electric quantity of the power battery; and if a preset fault state signal sent by the hybrid power motor is received and the residual electric quantity is larger than the preset residual electric quantity, controlling the vehicle to enter a limp mode. According to the technical scheme, after the hybrid power motor fails, the vehicle is controlled to enter the limp-home mode, so that the vehicle can continue to travel for a certain distance by utilizing the residual electric quantity of the power battery to the greatest extent, a user can conveniently select to travel to a safety area according to actual conditions to wait for rescue or travel to a 4S shop for maintenance, and the driving experience of the user is improved.
Description
Technical Field
The embodiment of the application relates to the technical field of vehicle control, in particular to a vehicle limp-home mode control method and device, a vehicle and a storage medium.
Background
With the development of technology and the importance of people on environmental protection, electric automobiles become important riding tools for people. The BSG is called as Belt-Driven Starter Generator, is an integrated machine which utilizes Belt transmission to take account of starting and generating, is positioned at the front end of an engine, and can adjust the rotating speed of the engine at any time. The hybrid BSG motor is an important part of the power system of the electric automobile and serves as a generator to convert the kinetic energy of the engine into electric energy.
According to the prior art, after the BSG of the hybrid power motor fails, the whole vehicle controller prompts the hybrid power system to fail through an instrument and simultaneously controls the hybrid power system to power down, namely, the 48V battery disconnection relay is controlled to be not charged and discharged again, the direct current converter is controlled to enter a standby mode to not transmit power again, the BSG motor is controlled to enter a neutral mode to not generate power or use power, the current consumption of the whole vehicle is completely provided by the storage battery, and the vehicle is directly flameout after continuously running until the electric quantity of the storage battery is used. The vehicle is extinguished quickly after the hybrid motor is in fault, and great inconvenience is brought to users.
Disclosure of Invention
The embodiment of the application provides a control method, a device, a vehicle and a storage medium for a vehicle limp mode, which are used for controlling the vehicle to enter the limp mode after a hybrid power motor fails, so that the vehicle can continue to travel a path by utilizing the residual electric quantity of a power battery to the greatest extent, a user can select to travel to a safe area according to actual conditions to wait for rescue or travel to a 4S shop for maintenance, and the driving experience of the user is improved.
In a first aspect, an embodiment of the present application provides a method for controlling a limp-home mode of a vehicle, including:
acquiring message information sent by a power battery in real time, wherein the message information comprises the residual electric quantity of the power battery;
and if a preset fault state signal sent by the hybrid power motor is received and the residual electric quantity is larger than the preset residual electric quantity, controlling the vehicle to enter a limp-home mode.
Further, after receiving the preset fault state signal sent by the hybrid electric motor and before controlling the vehicle to enter the limp-home mode, the method further comprises:
controlling the power battery to disconnect a battery relay, the direct current converter to enter a standby mode and the hybrid power motor to enter a neutral mode;
wherein the DC converter waits for an instruction in the standby mode; the hybrid electric machine is in an idle state in the neutral mode.
Further, the controlling the vehicle to enter a limp-home mode includes:
controlling the hybrid power motor to be in a neutral mode;
controlling the power battery to close the battery relay so as to enable the power battery to be in a discharging state;
and controlling the direct current converter to enter a buck mode so that the direct current converter performs current conversion on the discharging current of the power battery.
Further, the dc converter further includes, in the buck mode:
obtaining the maximum output power corresponding to the converted discharging current of the power battery through the direct current converter and the whole vehicle electric load corresponding to the whole vehicle electric load;
if the maximum output power is greater than or equal to the whole vehicle electric load, controlling the power battery to supply power to the whole vehicle electric load and charging a storage battery;
and if the maximum output power is smaller than the whole vehicle electric load, controlling the power battery and the storage battery to supply power to the whole vehicle electric load.
Further, the method further comprises the following steps:
detecting a fault state of the hybrid power motor in real time;
and if the fault recovery of the hybrid motor is detected, controlling the hybrid motor to enter a torque control mode.
Further, the method further comprises the following steps:
if the residual electric quantity of the power battery is smaller than or equal to the preset residual electric quantity and failure recovery of the hybrid electric motor is not detected, controlling the vehicle to exit the limp-home mode;
when the vehicle exits the limp-home mode, the power battery turns off the relay, and the direct-current power converter enters a standby mode.
Further, after controlling the vehicle to exit the limp-home mode, the method further includes:
controlling a hybrid power system in a powered-down state, the hybrid power system comprising: the power battery, the DC power converter and the hybrid motor.
In a second aspect, an embodiment of the present application further provides a control device for a vehicle limp mode, where the device includes:
the acquisition module is used for acquiring message information sent by the power battery in real time, wherein the message information comprises the residual electric quantity of the power battery;
and the first control module is used for controlling the vehicle to enter a limp-home mode if a preset fault state signal sent by the hybrid power motor is received and the residual electric quantity is larger than the preset residual electric quantity.
In a third aspect, an embodiment of the present application further provides a vehicle, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements a method for controlling a limp-home mode of the vehicle according to any one of the embodiments of the present application when the processor executes the program.
In a fourth aspect, an embodiment of the present application further provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method for controlling a vehicle limp-home mode according to any one of the embodiments of the present application.
According to the embodiment of the application, the message information sent by the power battery is obtained in real time, wherein the message information comprises the residual electric quantity of the power battery; if a preset fault state signal sent by the hybrid power motor is received and the residual electric quantity is larger than the preset residual electric quantity, controlling the vehicle to enter a limp-home mode, and solving the problem that in the prior art, after the direct-current hybrid power motor fails, the vehicle controller controls the hybrid power control system to power down, the current consumption of the vehicle is completely provided by the storage battery, and the vehicle is flameout soon after the hybrid power motor fails; can be after hybrid motor breaks down, control vehicle gets into limp-home mode to make the vehicle furthest utilize power battery 'S residual capacity to continue to travel a section journey, convenience of customers selects to travel to the safe region according to actual conditions and waits for rescue or travel to 4S shop by oneself and maintain, promotes user' S driving experience.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a control method of a vehicle limp-home mode in accordance with a first embodiment of the present application;
FIG. 2 is a schematic structural diagram of a hybrid control system of a vehicle;
fig. 3 is a flowchart of a control method of a vehicle limp-home mode in the second embodiment of the application;
fig. 4 is a schematic structural view of a control device for a limp-home mode of a vehicle in a third embodiment of the application;
fig. 5 is a schematic structural view of a vehicle in accordance with a fourth embodiment of the present application.
Detailed Description
The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
Example 1
Fig. 1 is a flowchart of a vehicle limp mode control method provided in an embodiment of the present application, where the embodiment is applicable to a situation that a vehicle enters a limp mode when a hybrid electric motor fails, and the method may be performed by a vehicle limp mode control device in the embodiment of the present application, where the device may be implemented in a software and/or hardware manner, and the vehicle limp mode control device may be integrated in a vehicle controller.
Fig. 2 is a schematic structural diagram of a hybrid control system of a vehicle, the hybrid control system including: the vehicle control unit comprises a vehicle control unit, a hybrid power motor, a direct-current power supply converter, a storage battery and a power battery.
The vehicle controller 110 is connected with the input ends of the hybrid power motor 120, the power battery 130 and the direct current power supply converter 140 through CAN buses respectively; the vehicle controller 110 is connected to the battery 150 via a gateway 170. The high-voltage direct-current power input ends of the hybrid power motor 120, the power battery 130 and the direct-current power converter 140 are connected through power lines; the low-voltage dc power output terminal of the dc power converter 140, the storage battery 150 and the power load 160 are connected by a power line. The vehicle controller sends a control command through the CAN bus to control the hybrid electric motor 120, the power battery 130 and the dc power converter 140.
The modes of operation of the hybrid electric machine 120 (Belt Driven Starter Generator, BSG) include: a torque control mode and a voltage control mode. When the hybrid motor 120 generates positive torque in the torque control mode, power assistance is provided for the engine, and at the moment, the hybrid motor consumes current, and the current source is the power battery 130; when negative torque is generated, mainly the braking working condition energy is recovered to generate electricity, and the output current can charge the power battery 130 and can be transmitted to the low-voltage side through the direct-current power converter 140. The hybrid motor 120, in the voltage control mode, corresponds to a conventional generator, consuming the torque of the engine to generate current, and at this time, cannot provide a boosting torque, i.e., a positive torque.
The vehicle controller 110 (Hybrid Combining Unit, HCU) may include a hybrid controller for controlling an engine (not shown) in the hybrid control system and an engine controller for controlling the operation states of a hybrid motor, a dc power converter, a battery and a power cell, and supplying power to the vehicle and supplying power to an electric load in the vehicle to control the vehicle to run normally.
The operation modes of the dc power converter 140 (DCDC) include: a buck mode and a standby mode. In the buck mode, the dc power converter 140 is mainly used to convert the high-voltage dc power output by the hybrid system 100 into a low-voltage dc power, and supply power to the electric load 160 or charge the battery 150. The hybrid system 100 includes a hybrid motor 120 and a power battery 130, among others. In the standby mode, the energy transmission from the hybrid system 100 to the power utilization system 200 is disconnected. At this time, the electric load is supplied with electric power from the storage battery. Whether the dc power converter 140 is in the standby mode depends on the power reserve condition of the battery 150 and the load condition of the power load 160. If the battery reserve is relatively high, the battery 150 needs to be properly discharged, and the dc power converter 140 is in standby mode. The reserve of the battery is generally maintained between 30% and 90%.
As shown in fig. 1, the method specifically includes the following steps:
s110, acquiring message information sent by the power battery in real time, wherein the message information comprises the residual electric quantity of the power battery.
The power battery may be, for example, a 48V battery.
Specifically, the power battery sends message information to the whole vehicle controller in real time through the CAN bus, wherein the message information comprises the residual electric quantity of the power battery.
And S120, if a preset fault state signal sent by the hybrid power motor is received and the residual electric quantity is larger than the preset residual electric quantity, controlling the vehicle to enter a limp mode.
Wherein the preset remaining amount of electricity may be determined according to characteristics of the power battery and a configuration of the vehicle. The preset remaining capacity may be 25% of the capacity of the power battery, for example.
Specifically, if a preset fault state signal sent by the hybrid power motor is received, the hybrid power motor is indicated to have a fault and can not provide power assistance and power generation functions. In the prior art, the hybrid motor, the 48V battery and the direct-current power supply converter are directly controlled to be powered down, and the current consumption of the whole vehicle is completely provided by the storage battery, so that the vehicle can directly flameout after the electric quantity of the storage battery is used up during continuous running. However, if the remaining power of the power battery is greater than the preset remaining power, the vehicle can continue to supply electric energy for continuous running.
Therefore, if a preset fault state signal sent by the hybrid power motor is received, and the residual electric quantity of the power battery is larger than the preset residual electric quantity, the vehicle is controlled to enter a limp mode, and the residual electric quantity of the power battery is used for continuously supplying power to the power load after being converted by the current of the direct-current power converter, so that the vehicle product can continuously travel for a certain distance by fully utilizing the electric energy provided by the power battery and the storage battery, the travel distance of the vehicle after the hybrid power motor is failed is prolonged as far as possible, and meanwhile, a user is prompted to drive carefully through an instrument.
It should be noted that not all faults occurring in the hybrid motor affect the hybrid motor to continue to participate in driving assistance and power generation; therefore, the preset fault state signal only includes a fault state indicating that the hybrid motor is affected to continue to participate in the driving assistance and the power generation, and the fault state signal may include a preset state character to identify whether the fault state signal is the preset fault state signal. Hybrid motor faults that require control of the vehicle into limp home mode may include, for example, the following: motor inverter failure, motor position sensor failure, motor inverter temperature sensor failure, motor stator phase current sensor failure, motor high voltage end voltage sensor failure, motor excitation MOSEFET failure, motor demagnetization MOSFET failure, motor excitation loop open circuit failure, motor rotor current over high, motor torque output abnormality, motor stator failure, motor rotor position estimation failure, motor carbon brush wear failure, or motor stator phase current over high.
According to the technical scheme, message information sent by the power battery is obtained in real time, wherein the message information comprises the residual electric quantity of the power battery; if a preset fault state signal sent by the hybrid power motor is received, and the residual electric quantity is larger than the preset residual electric quantity, the vehicle is controlled to enter a limp mode, and the vehicle is controlled to enter the limp mode after the hybrid power motor breaks down, so that the vehicle can continue to travel for a certain distance by utilizing the residual electric quantity of the power battery to the greatest extent, a user can select to travel to a safe area according to actual conditions to wait for rescue or travel to a 4S shop to repair, and the driving experience of the user is improved.
Optionally, the method further comprises:
detecting the fault state of the hybrid power motor in real time;
if the fault recovery of the hybrid power motor is detected, controlling the hybrid power motor to enter a torque control mode;
if the residual electric quantity of the power battery is smaller than or equal to the preset residual electric quantity and failure recovery of the hybrid power motor is not detected, controlling the vehicle to exit from a limp mode;
when the vehicle exits from the limp-home mode, the power battery turns off the relay, and the direct-current power converter enters into the standby mode.
Specifically, after a preset fault state signal sent by the hybrid power motor is received, detecting the fault state of the hybrid power motor in real time; and if the fault recovery of the hybrid motor is detected, controlling the hybrid motor to enter a torque control mode, and providing torque assistance or generating power according to the running state of the vehicle. If the residual electric quantity of the power battery is smaller than or equal to the preset residual electric quantity and the fault recovery of the hybrid electric motor is not detected, the fault of the hybrid electric motor is not recovered, but the residual electric quantity of the power battery is insufficient and can not be continuously discharged, and the vehicle is controlled to exit the limp-home mode.
When the vehicle exits the limp mode, the power battery turns off the relay and no longer provides electric energy; and the dc power converter enters a standby mode.
Optionally, after the vehicle is controlled to exit the limp mode, the method further includes:
controlling the hybrid power system to be in a power-down state, wherein the hybrid power system comprises: a power battery, a DC power converter and a hybrid motor.
Specifically, after the vehicle exits the limp-home mode, the power battery, the dc power converter, and the hybrid electric machine are all controlled not to be in a powered-down state. The whole vehicle power load automatically obtains electric energy from the storage battery to supply the vehicle to continue running until the electric quantity of the storage battery is exhausted and the vehicle stops. Thus, after the hybrid power motor fails, the vehicle is controlled to enter a limp-home mode so as to make the vehicle continue to run for a certain distance by utilizing the residual electric quantity of the power battery and the electric quantity of the storage battery to the maximum extent,
example two
Fig. 3 is a flowchart of a control method for a limp-home mode of a vehicle according to a second embodiment of the present application, where the method is optimized based on the above embodiment, and in this embodiment, after receiving a preset fault state signal sent by a hybrid electric motor and before controlling the vehicle to enter the limp-home mode, the method further includes: the power battery is controlled to disconnect the battery relay, the direct current converter enters a standby mode, and the hybrid power motor enters a neutral mode; the direct current converter waits for an instruction in a standby mode; the hybrid electric machine is in an idle state in the neutral mode.
As shown in fig. 3, the method of this embodiment specifically includes the following steps:
s210, acquiring message information sent by the power battery in real time, wherein the message information comprises the residual electric quantity of the power battery.
S220, if a preset fault state signal sent by the hybrid power motor is received, the power battery is controlled to disconnect the battery relay, the direct current converter enters a standby mode, and the hybrid power motor enters a neutral mode; the direct current converter waits for an instruction in a standby mode; the hybrid electric machine is in an idle state in the neutral mode.
Specifically, if the vehicle controller receives a preset fault state signal sent by the hybrid power motor and determines that the remaining capacity of the power battery is greater than the preset remaining capacity in the running process of the vehicle, the following three operations are required to be executed: the first operation is to send a control instruction to the power battery to control the power battery to disconnect a battery relay so as to enable the power battery to be powered down; the second operation is to send a control instruction to the direct current converter to control the direct current converter to enter a standby mode, and the direct current converter waits for an instruction in the standby mode; the second operation is to send a control command to the hybrid motor to control the hybrid motor to enter a neutral mode in which the shaft of the motor is disconnected from the internal mechanism, although the engine is rotating with the shaft of the BSG motor via the belt, the hybrid motor is in an idle state and cannot generate power without generating a boost torque.
When a preset fault state signal sent by the hybrid power motor is received, the hybrid power motor is controlled to enter a neutral mode at the first time, the direct current converter enters a standby mode to wait for an instruction, then decision is made according to the residual electric quantity of the power battery, and safe driving of the vehicle is guaranteed.
And S230, if the residual electric quantity is larger than the preset residual electric quantity, controlling the vehicle to enter a limp-home mode.
Specifically, if the remaining power is greater than the preset remaining power, the vehicle is controlled to enter a limp-home mode, and the remaining power of the power battery is converted through the current of the direct-current power converter and then is continuously supplied to the power load, so that the vehicle product can continuously travel for a certain distance by fully utilizing the electric energy provided by the power battery and the storage battery. If the remaining power is less than or equal to the preset remaining power, which indicates that the remaining power of the power battery is insufficient, the hybrid power system is controlled to be in a power-down state, and the hybrid power system comprises: a power battery, a DC power converter and the hybrid motor; the current consumption of the whole vehicle is provided by the storage battery. The instrument can also prompt the estimated driving time and flameout after stopping as soon as possible.
According to the technical scheme, message information sent by the power battery is obtained in real time, wherein the message information comprises the residual electric quantity of the power battery; if a preset fault state signal sent by the hybrid power motor is received, and the residual electric quantity is larger than the preset residual electric quantity, the vehicle is controlled to enter a limp mode, and the vehicle is controlled to enter the limp mode after the hybrid power motor breaks down, so that the vehicle can continue to travel for a certain distance by utilizing the residual electric quantity of the power battery to the greatest extent, a user can select to travel to a safe area according to actual conditions to wait for rescue or travel to a 4S shop to repair, and the driving experience of the user is improved.
Optionally, controlling the vehicle to enter the limp home mode includes:
controlling the hybrid power motor to be in a neutral mode;
controlling the power battery to close the battery relay so as to enable the power battery to be in a discharging state;
and controlling the direct current converter to enter a step-down mode so that the direct current converter performs current conversion on the discharging current of the power battery.
Specifically, the vehicle is controlled to enter a limp mode, the hybrid power motor keeps a neutral gear mode in the limp mode, and the power battery is controlled to close the battery relay so as to be in a discharging state and discharge to the direct current converter; and controlling the direct current converter to enter a step-down mode to perform current conversion on the output discharge current of the power battery, and supplying power to the whole vehicle electric load.
Optionally, the dc converter further comprises in buck mode:
obtaining the maximum output power corresponding to the discharge current of the power battery after being converted by the direct current converter and the whole vehicle electric load corresponding to the whole vehicle electric load;
if the maximum output power is greater than or equal to the electric load of the whole vehicle, controlling the power battery to supply power to the electric load of the whole vehicle and charging the storage battery;
and if the maximum output power is smaller than the electric load of the whole vehicle, controlling the power battery and the storage battery to supply power to the electric load of the whole vehicle.
Specifically, in the buck mode, the dc converter obtains the maximum output power corresponding to the discharge current of the power battery after the conversion of the dc converter and the whole electric load corresponding to the whole electric load, determines the magnitude relation between the maximum output power and the whole electric load corresponding to the whole electric load, and if the maximum output power is greater than or equal to the whole electric load corresponding to the whole electric load, it indicates that the discharge current of the power battery can meet the electric load required by the whole electric load and even has the allowance, so that the power battery is controlled to supply power to the whole electric load and charge the storage battery. If the maximum output power is smaller than the electric load of the whole vehicle, the discharging current of the power battery cannot meet the electric load required by the electric load of the whole vehicle, so that the power battery is controlled to supply power to the electric load of the whole vehicle, and the storage battery is controlled to discharge to the electric load of the whole vehicle at the same time, so that the normal running of the vehicle is ensured.
Since the hybrid motor fails in power, no power-assisted torque can be generated and no power can be generated, the speed of the vehicle should be kept within a low range to ensure that the vehicle can continue to travel for a certain distance under the power provided by the power battery, for example, the maximum speed is limited to not more than 30 km/h.
The method for obtaining the maximum output power corresponding to the converted discharging current of the power battery through the direct current converter may be that the maximum output power of the discharging current of the power battery is obtained, and the current conversion parameter of the direct current converter is calculated to obtain the maximum output power corresponding to the converted discharging current of the power battery through the direct current converter; the maximum power output by the direct current converter can also be directly obtained.
Example III
Fig. 4 is a schematic structural diagram of a control device for a limp-home mode of a vehicle according to a third embodiment of the present application. The embodiment may be suitable for controlling the vehicle to enter a limp-home mode when the hybrid electric motor fails, and the device may be implemented in a software and/or hardware manner, and may be integrated in a vehicle controller, as shown in fig. 4, where the vehicle limp-home mode control device specifically includes: an acquisition module 310 and a first control module 320.
The acquiring module 310 is configured to acquire, in real time, message information sent by a power battery, where the message information includes a remaining power of the power battery;
the first control module 320 is configured to control the vehicle to enter a limp-home mode if a preset fault state signal sent by the hybrid electric motor is received and the remaining power is greater than a preset remaining power.
Optionally, the method further comprises:
the second control module is used for controlling the power battery to disconnect a battery relay, the direct current converter to enter a standby mode and the hybrid motor to enter a neutral mode after receiving a preset fault state signal sent by the hybrid motor and before controlling the vehicle to enter a limp-home mode; wherein the DC converter waits for an instruction in the standby mode; the hybrid electric machine is in an idle state in the neutral mode.
Optionally, the first control module 320 includes:
the first control unit is used for controlling the hybrid electric motor to be in a neutral mode;
the second control unit is used for controlling the power battery to close the battery relay so as to enable the power battery to be in a discharging state;
and the third control unit is used for controlling the direct current converter to enter a buck mode so as to enable the direct current converter to perform current conversion on the discharging current of the power battery.
Optionally, the third control unit is specifically configured to:
obtaining the maximum output power corresponding to the converted discharging current of the power battery through the direct current converter and the whole vehicle electric load corresponding to the whole vehicle electric load;
if the maximum output power is greater than or equal to the whole vehicle electric load, controlling the power battery to supply power to the whole vehicle electric load and charging a storage battery;
and if the maximum output power is smaller than the whole vehicle electric load, controlling the power battery and the storage battery to supply power to the whole vehicle electric load.
Optionally, the method further comprises:
the detection module is used for detecting the fault state of the hybrid power motor in real time;
and the third control module is used for controlling the hybrid motor to enter a torque control mode if the fault recovery of the hybrid motor is detected.
Optionally, the method further comprises:
a fourth control module, configured to control the vehicle to exit the limp-home mode if the remaining capacity of the power battery is less than or equal to a preset remaining capacity and failure recovery of the hybrid motor is not detected; when the vehicle exits the limp-home mode, the power battery turns off the relay, and the direct-current power converter enters a standby mode.
Optionally, the method further comprises:
a fifth control module for controlling a hybrid system to be in a powered-down state after the vehicle exits the limp-home mode, the hybrid system comprising: the power battery, the DC power converter and the hybrid motor.
The product can execute the control method of the vehicle limp mode provided by any embodiment of the application, and has the corresponding functional module and beneficial effects of the execution method.
Example IV
Fig. 5 is a block diagram of a vehicle according to a fourth embodiment of the present application, and as shown in fig. 5, the vehicle includes a processor 410, a memory 420, an input device 430 and an output device 440; the number of processors 410 in the vehicle may be one or more, one processor 410 being illustrated in fig. 5; the processor 410, memory 420, input device 430, and output device 440 in the vehicle may be connected by a bus or other means, for example in fig. 5.
The memory 420 is a computer readable storage medium, and may be used to store a software program, a computer executable program, and a module, such as program instructions/modules corresponding to a vehicle limp-home mode control method in an embodiment of the present application (e.g., the acquisition module 310 and the first control module 320 in a vehicle limp-home mode control device). The processor 410 executes various functional applications of the vehicle and data processing, i.e., implements the above-described control method of the vehicle limp-home mode, by running software programs, instructions, and modules stored in the memory 420.
Memory 420 may include primarily a program storage area and a data storage area, wherein the program storage area may store an operating system, at least one application program required for functionality; the storage data area may store data created according to the use of the terminal, etc. In addition, memory 420 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some examples, memory 420 may further include memory remotely located with respect to processor 410, which may be connected to the vehicle via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 430 may be used to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the vehicle. The output 440 may include a display device such as a display screen.
Example five
A fifth embodiment of the present application provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the vehicle limp-home mode control method as provided in all the embodiments of the present application: acquiring message information sent by a power battery in real time, wherein the message information comprises the residual electric quantity of the power battery; and if a preset fault state signal sent by the hybrid power motor is received and the residual electric quantity is larger than the preset residual electric quantity, controlling the vehicle to enter a limp mode.
Any combination of one or more computer readable media may be employed. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations of the present application may be written in one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
Note that the above is only a preferred embodiment of the present application and the technical principle applied. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, while the application has been described in connection with the above embodiments, the application is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the application, which is set forth in the following claims.
Claims (7)
1. A method for controlling a vehicle limp-home mode, the method comprising:
acquiring message information sent by a power battery in real time, wherein the message information comprises the residual electric quantity of the power battery;
if a preset fault state signal sent by the hybrid power motor is received and the residual electric quantity is larger than the preset residual electric quantity, the power battery is controlled to disconnect a battery relay, the direct current converter enters a standby mode and the hybrid power motor enters a neutral mode;
controlling the vehicle to enter a limp mode;
the controlling the vehicle to enter a limp home mode includes:
controlling the hybrid power motor to be in a neutral mode;
controlling the power battery to close the battery relay so as to enable the power battery to be in a discharging state;
controlling the direct current converter to enter a buck mode so as to enable the direct current converter to perform current conversion on discharge current of the power battery;
the step-down mode of the dc converter includes:
obtaining the maximum output power corresponding to the converted discharging current of the power battery through the direct current converter and the whole vehicle electric load corresponding to the whole vehicle electric load;
if the maximum output power is greater than or equal to the whole vehicle electric load, controlling the power battery to supply power to the whole vehicle electric load and charging a storage battery;
and if the maximum output power is smaller than the whole vehicle electric load, controlling the power battery and the storage battery to supply power to the whole vehicle electric load.
2. The method as recited in claim 1, further comprising:
detecting a fault state of the hybrid power motor in real time;
and if the fault recovery of the hybrid motor is detected, controlling the hybrid motor to enter a torque control mode.
3. The method as recited in claim 2, further comprising:
if the residual electric quantity of the power battery is smaller than or equal to the preset residual electric quantity and failure recovery of the hybrid electric motor is not detected, controlling the vehicle to exit the limp-home mode;
when the vehicle exits the limp-home mode, the power battery turns off the relay, and the direct-current power converter enters a standby mode.
4. The method of claim 3, further comprising, after controlling the vehicle to exit the limp mode:
controlling a hybrid power system in a powered-down state, the hybrid power system comprising: the power battery, the DC power converter and the hybrid motor.
5. A control device for a limp-home mode of a vehicle, characterized by comprising:
the acquisition module is used for acquiring message information sent by the power battery in real time, wherein the message information comprises the residual electric quantity of the power battery;
the first control module is used for controlling the vehicle to enter a limp-home mode if a preset fault state signal sent by the hybrid power motor is received and the residual electric quantity is larger than a preset residual electric quantity;
the second control module is used for controlling the power battery to disconnect a battery relay, the direct current converter to enter a standby mode and the hybrid motor to enter a neutral mode after receiving a preset fault state signal sent by the hybrid motor and before controlling the vehicle to enter a limp-home mode; wherein the DC converter waits for an instruction in the standby mode; the hybrid electric motor is in an idle state in the neutral mode;
the first control module includes:
the first control unit is used for controlling the hybrid electric motor to be in a neutral mode;
the second control unit is used for controlling the power battery to close the battery relay so as to enable the power battery to be in a discharging state;
the third control unit is used for controlling the direct current converter to enter a buck mode so as to enable the direct current converter to conduct current conversion on the discharging current of the power battery;
the third control unit is specifically configured to:
obtaining the maximum output power corresponding to the converted discharging current of the power battery through the direct current converter and the whole vehicle electric load corresponding to the whole vehicle electric load;
if the maximum output power is greater than or equal to the whole vehicle electric load, controlling the power battery to supply power to the whole vehicle electric load and charging a storage battery;
and if the maximum output power is smaller than the whole vehicle electric load, controlling the power battery and the storage battery to supply power to the whole vehicle electric load.
6. A vehicle comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any of claims 1-4 when the program is executed.
7. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method according to any of claims 1-4.
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