CN112373309A - Method and system for automatically positioning insulation failure high-voltage component of new energy vehicle - Google Patents
Method and system for automatically positioning insulation failure high-voltage component of new energy vehicle Download PDFInfo
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- CN112373309A CN112373309A CN202011329992.4A CN202011329992A CN112373309A CN 112373309 A CN112373309 A CN 112373309A CN 202011329992 A CN202011329992 A CN 202011329992A CN 112373309 A CN112373309 A CN 112373309A
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- 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
- B60L3/0069—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to the isolation, e.g. ground fault or leak current
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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
- 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
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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
- 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
- B60W50/0225—Failure correction strategy
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Abstract
The application relates to a method and a system for automatically positioning an insulation failure high-voltage component of a new energy vehicle, wherein the method comprises the following steps: carrying out priority division on different high-voltage components, and setting fault processing strategies for different priorities; setting the positioning sequence of the high-voltage components according to the priority of different high-voltage components; sequentially controlling high-voltage contactors connected with the high-voltage components to be closed according to a set positioning sequence, monitoring whether the high-voltage system has an insulation failure fault, if so, positioning that the high-voltage components have the insulation failure, and if not, controlling the high-voltage contactors connected with the next high-voltage components to be closed according to the set positioning sequence until all the high-voltage components having the insulation failure are positioned; and executing a corresponding fault handling strategy according to the priorities of all the positioned high-voltage components with insulation failure. The application provides a method for automatically positioning an insulation failure high-voltage component of a new energy vehicle, which can realize automatically positioning the insulation failure high-voltage component and is more intelligent.
Description
Technical Field
The application relates to the technical field of vehicle safety and control, in particular to a method and a system for automatically positioning an insulation failure high-voltage component of a new energy vehicle.
Background
In recent years, various new energy vehicles are greatly popularized in the market, and meanwhile, in order to meet the high-speed development requirement of new energy vehicles, parts of traditional fuel vehicles and a large number of industrial parts are modified and are quickly applied to the new energy vehicles, the parts are not verified for a large time in a large batch, and various faults occur along with the input and use of the vehicles, so that the vehicles cannot normally run.
Based on the safety design requirement of the new energy vehicle, the insulation resistance of the vehicle is a real-time detection index, once the insulation value is lower than a set threshold value, insulation fault is possibly caused, a driver is reminded through sound and light alarm, and corresponding processing means are adopted through vehicle control.
Generally, the insulation failure of the whole vehicle is easily caused by the sealing failure of some automobile parts which are not verified after being exposed to the sun, rain, vibration or the like, and the insulation failure of the whole vehicle is caused by the insulation failure of the automobile parts which are not verified, and particularly, the insulation failure of a new energy vehicle is the highest frequency in rainy days.
In order to ensure the safety of the vehicle, the current new energy commercial vehicle adopts the following processing scheme aiming at the insulation failure fault: minor failure, vehicle limp home; and if the fault is serious, powering off and stopping, and waiting for maintenance and rescue until the fault is relieved.
Although the processing scheme guarantees the safety of the vehicle, once an insulation fault occurs, maintenance personnel must arrive at the site and position a fault point by means of maintenance equipment, such as an insulation meter, through pulling out high-voltage wiring harnesses of all parts and measuring insulation resistance values one by one, and finally, the fault is solved temporarily in a mode of pulling out the high-voltage wiring harnesses of the insulation parts so as to guarantee the movement of the vehicle; if the vehicle cannot move to the rain shelter in time in a rainy day, the failure of the vehicle is aggravated in the troubleshooting process, and meanwhile, the part without the insulation failure can generate the insulation failure due to careless water inflow; or request for rescue and implement trailer, the vehicle stays on the road for a long time, which affects normal traffic and generates a large amount of service cost.
Disclosure of Invention
The embodiment of the application provides a method and a system for automatically positioning an insulation failure high-voltage component of a new energy vehicle, and aims to solve the technical problems that the insulation failure high-voltage component cannot be automatically positioned in the related technology, and the vehicle can only stay for a long time and normal traffic is influenced because maintenance personnel can only wait for arriving at the site.
In a first aspect, a method for automatically positioning an insulation failure high-voltage component of a new energy vehicle is provided, and the method comprises the following steps:
the method comprises the steps that different high-voltage components are subjected to priority classification according to the influence degree of the different high-voltage components on a vehicle after insulation failure, the high-voltage components with larger influence degree on the vehicle are higher than the high-voltage components with smaller influence degree on the vehicle, and corresponding fault handling strategies are set for the different priorities;
setting the positioning sequence of the high-voltage components according to the priority of different high-voltage components;
sequentially controlling high-voltage contactors connected with the high-voltage components to be closed according to a set positioning sequence, monitoring whether the high-voltage system has an insulation failure fault, if so, positioning that the high-voltage components have the insulation failure, and if not, controlling the high-voltage contactors connected with the next high-voltage components to be closed according to the set positioning sequence until all the high-voltage components having the insulation failure are positioned;
and executing a corresponding fault handling strategy according to the priorities of all the positioned high-voltage components with insulation failure.
In some embodiments, the specific steps of prioritizing the different high-voltage components according to the influence degree of the different high-voltage components on the vehicle after the insulation failure occurs, and setting corresponding fault handling strategies for the different priorities include:
if the vehicle cannot be started or run after the high-voltage component is subjected to insulation failure, dividing the high-voltage component into a first priority, and setting a fault handling strategy for the first priority to control the vehicle to stop starting or running;
if the vehicle can drive in a limp mode after the high-voltage component is subjected to insulation failure, the high-voltage component is divided into a second priority level, and the fault handling strategy set for the second priority level is used for controlling the vehicle to drive in a limp mode;
and if the vehicle can normally run after the high-voltage component is subjected to insulation failure, dividing the high-voltage component into a third priority, and setting a fault handling strategy for the third priority to control the vehicle to normally run.
In some embodiments, the specific step of setting the positioning order of the high-voltage components according to the priorities of the different high-voltage components comprises:
the positioning order of the high-voltage components is set in the order of the first priority, the second priority, and the third priority.
In some embodiments, before sequentially controlling the high-voltage contactors connected with the high-voltage components to be closed according to the set positioning sequence, the method further comprises the following steps:
and monitoring whether the insulation resistance value of the whole vehicle reaches a preset threshold value, if so, sending out a fault alarm, controlling the vehicle to be powered off safely, and if not, not operating.
In some embodiments, the specific step of controlling safe power-down of the vehicle includes:
and the vehicle control unit disconnects the enabling signal of the high-voltage component and controls the high-voltage contactor connected with the high-voltage component to be disconnected so as to safely power off the vehicle.
In some embodiments, the first priority high-pressure component comprises a power battery system, a drive motor system, a brake air pump, or a steering oil pump;
the high-voltage component of the second priority includes a DCDC converter or a fuel cell system;
the high-voltage component of the third priority includes an air conditioner compressor or a PTC heater.
In some embodiments, the step of executing the corresponding fault handling strategy according to the priority of all the located high-voltage components with insulation failure comprises:
controlling all high-voltage contactors connected with all the positioned high-voltage components which are subjected to insulation failure to be in an off state;
and executing the fault processing strategy corresponding to the high-voltage component with the highest priority.
In a second aspect, a system for automatically positioning an insulation failure high-voltage component of a new energy vehicle is provided, which comprises:
the first setting module is used for carrying out priority classification on different high-voltage components according to the influence degree of the different high-voltage components on the vehicle after insulation failure, the high-voltage components with larger influence degree on the vehicle are higher than the high-voltage components with smaller influence degree on the vehicle, and corresponding fault handling strategies are set for the different priorities;
the second setting module is used for setting the positioning sequence of the high-voltage components according to the priority of different high-voltage components;
the positioning module is used for sequentially controlling the high-voltage contactors connected with the high-voltage components to be closed according to a set positioning sequence, monitoring whether the high-voltage system has insulation failure faults or not, if so, positioning the high-voltage components to have insulation failure, and if not, controlling the high-voltage contactors connected with the next high-voltage component to be closed according to the set positioning sequence until all the high-voltage components with insulation failure are positioned;
and the execution module is used for executing a corresponding fault handling strategy according to the priorities of all the positioned high-voltage components with insulation failures.
In some embodiments, the first setting module is specifically configured to:
if the vehicle cannot be started or run after the high-voltage component is subjected to insulation failure, dividing the high-voltage component into a first priority, and setting a fault handling strategy for the first priority to control the vehicle to stop starting or running;
if the vehicle can drive in a limp mode after the high-voltage component is subjected to insulation failure, the high-voltage component is divided into a second priority level, and the fault handling strategy set for the second priority level is used for controlling the vehicle to drive in a limp mode;
and if the vehicle can normally run after the high-voltage component is subjected to insulation failure, dividing the high-voltage component into a third priority, and setting a fault handling strategy for the third priority to control the vehicle to normally run.
In some embodiments, the second setting module is specifically configured to: the positioning order of the high-voltage components is set in the order of the first priority, the second priority, and the third priority.
The beneficial effect that technical scheme that this application provided brought includes: the automatic positioning of the insulation failure high-voltage component can be realized, a corresponding fault processing strategy is executed, maintenance personnel do not need to wait for the treatment after arriving at the site, the intelligent positioning system is more intelligent, the vehicle stopping time is shorter, and the influence on normal traffic is reduced.
The embodiment of the application provides a method for automatically positioning an insulation failure high-voltage component of a new energy vehicle, priorities are set for different high-voltage components, the positioning sequence of the high-voltage components is set according to the priorities, corresponding high-voltage contactors are controlled to be closed in sequence according to the positioning sequence, whether insulation failure faults occur in a monitoring system or not is monitored, the high-voltage components with the insulation failure are positioned, corresponding fault handling strategies are executed according to the priorities of all the positioned high-voltage components with the insulation failure, the insulation failure high-voltage components can be automatically positioned, the corresponding fault handling strategies are executed, the high-voltage components can be handled without waiting for maintenance personnel to arrive at the site, the method is more intelligent, the vehicle stopping time is shorter, and the influence on normal traffic is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a method for automatically positioning an insulation-failure high-voltage component of a new energy vehicle according to an embodiment of the present application;
fig. 2 is a specific flowchart of step S4 in the method for automatically positioning an insulation failure high-voltage component for a new energy vehicle according to the embodiment of the present application;
fig. 3 is a block diagram of a system for automatically positioning an insulation failure high-voltage component of a new energy vehicle according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, an embodiment of the present application provides a method for automatically positioning an insulation failure high-voltage component of a new energy vehicle, including the steps of:
s1: the method comprises the steps that different high-voltage components are subjected to priority classification according to the influence degree of the different high-voltage components on a vehicle after insulation failure, the high-voltage components with larger influence degree on the vehicle are higher than the high-voltage components with smaller influence degree on the vehicle, and corresponding fault handling strategies are set for the different priorities;
s2: setting the positioning sequence of the high-voltage components according to the priority of different high-voltage components;
s3: sequentially controlling high-voltage contactors connected with the high-voltage components to be closed according to a set positioning sequence, monitoring whether the high-voltage system has an insulation failure fault, if so, positioning that the high-voltage components have the insulation failure, and if not, controlling the high-voltage contactors connected with the next high-voltage components to be closed according to the set positioning sequence until all the high-voltage components having the insulation failure are positioned;
s4: and executing a corresponding fault handling strategy according to the priorities of all the positioned high-voltage components with insulation failure.
The method for automatically positioning the insulation failure high-voltage component of the new energy vehicle comprises the steps of setting priorities for different high-voltage components, setting a positioning sequence of the high-voltage components according to the priorities, sequentially controlling the corresponding high-voltage contactors to be closed according to the positioning sequence, monitoring whether insulation failure faults occur in a system, positioning the high-voltage components with the insulation failure, executing corresponding fault processing strategies according to the priorities of all the positioned high-voltage components with the insulation failure, automatically positioning the insulation failure high-voltage components, executing the corresponding fault processing strategies, and processing the high-voltage components without waiting for a maintenance worker to arrive at the site.
Further, in the embodiment of the present application, in step S1, the specific steps of prioritizing the different high-voltage components according to the influence degree of the different high-voltage components on the vehicle after the insulation failure occurs, and setting the corresponding fault handling strategies for the different priorities include:
if the vehicle cannot be started or run after the high-voltage component is subjected to insulation failure, dividing the high-voltage component into a first priority, and setting a fault handling strategy for the first priority to control the vehicle to stop starting or running;
if the vehicle can drive in a limp mode after the high-voltage component is subjected to insulation failure, the high-voltage component is divided into a second priority level, and the fault handling strategy set for the second priority level is used for controlling the vehicle to drive in a limp mode;
and if the vehicle can normally run after the high-voltage component is subjected to insulation failure, dividing the high-voltage component into a third priority, and setting a fault handling strategy for the third priority to control the vehicle to normally run.
Specifically, in the embodiment of the present application, the high-voltage component of the first priority level includes a power battery system, a driving motor system, a brake air pump or a steering oil pump; the high-voltage component of the second priority includes a DCDC converter or a fuel cell system; the high-voltage component of the third priority includes an air conditioner compressor or a PTC heater.
Correspondingly, the high-voltage contactor connected with the power battery system is a high-voltage main negative contactor, the high-voltage contactor connected with the positive electrode of the driving motor system is a main positive contactor, the high-voltage contactor connected with the brake air pump is a brake air pump high-voltage contactor, the high-voltage contactor connected with the steering oil pump is an oil pump high-voltage contactor, the high-voltage contactor connected with the DCDC converter is a DCDC converter contactor, the high-voltage contactor connected with the fuel battery system is a fuel battery high-voltage contactor, the high-voltage contactor connected with the air conditioner compressor is an air conditioner compressor contactor, and the high-voltage contactor connected with the PTC heater is a PTC contactor.
Further, in the embodiment of the present application, in the step S2, the specific step of setting the positioning order of the high-voltage components according to the priorities of the different high-voltage components includes:
and setting the positioning sequence of the high-voltage components according to the first priority, the second priority and the third priority, namely preferentially positioning the high-voltage components with higher priority and then positioning the high-voltage components with lower priority.
It should be noted that, the positioning orders of the high-voltage components with different priorities are performed according to the priorities, and the positioning orders of the high-voltage components with the same priority can be set as required and the front-back order can be adjusted.
Specifically, in the embodiment of the present application, the positioning sequence of all the high-voltage components may be: the system comprises a power battery system, a driving motor system, a brake air pump, a steering oil pump, a DCDC converter, a fuel battery system, an air conditioner compressor and a PTC heater.
The specific step of step S3 in this embodiment of the present application includes:
s301: the vehicle control unit controls a high-voltage main negative contactor connected with a high-voltage negative pole circuit of the power battery system to be closed;
s302: monitoring whether the high-voltage system has an insulation failure fault, if so, turning to a step S303, and if not, turning to a step S305;
s303: positioning the power battery system to have insulation failure, and turning to the step S304;
s304: the instrument displays the insulation failure fault of the power battery system;
s305: the vehicle control unit controls a main positive contactor connected with the positive electrode of the driving motor system to be closed;
s306: monitoring whether the high voltage has insulation failure fault, if so, turning to step S307, and if not, turning to step S309;
s307: positioning the drive motor to have insulation failure, and turning to step S308;
s308: the instrument displays 'insulation failure fault of driving motor';
s309: the vehicle control unit controls a brake air pump high-voltage contactor connected with a brake air pump to be closed;
s310, monitoring whether the high voltage has insulation failure fault, if so, turning to S311, otherwise, turning to S313;
s311: positioning the brake air pump to have insulation failure, and turning to step S312;
s312: the instrument displays 'brake air pump insulation failure fault';
s313, the vehicle control unit controls an oil pump high-pressure contactor connected with the steering oil pump to be closed;
s314, monitoring whether the high voltage has insulation failure fault, if so, turning to S315, otherwise, turning to S317;
s315: positioning the steering oil pump to cause insulation failure, and turning to step S316;
s316: instrument display of "insulation failure fault of steering oil pump";
s317: the vehicle control unit controls a contactor of the DCDC converter connected with the DCDC converter to be closed;
s318, monitoring whether the high voltage has insulation failure fault, if yes, turning to the step S319, and if not, turning to the step S321;
s319: positioning that the insulation failure of the DCDC converter occurs, and turning to step S320;
s320: instrument display "insulation failure fault of DCDC converter";
s321: the vehicle control unit controls a fuel cell high-voltage contactor connected with the fuel cell system to be closed;
s322, monitoring whether the high voltage has insulation failure fault, if yes, turning to the step S323, if not, turning to the step S325;
s323: positioning the occurrence of insulation failure of the fuel cell system, and turning to step S324;
s324: the meter displays "fuel cell system insulation failure fault";
s325: the vehicle control unit controls an air conditioner compressor contactor connected with an air conditioner compressor to be closed;
s326, monitoring whether the high voltage has insulation failure fault, if yes, turning to the step S327, and if not, turning to the step S329;
s327: positioning the air outlet pressure regulating compressor to have insulation failure, and turning to the step S328;
s328: instrument display 'insulation failure fault of air conditioner compressor';
s329: the vehicle control unit controls a PTC contactor connected with the PTC heater to be closed;
s330, monitoring whether the high voltage has insulation failure fault, if so, turning to the step S331, and if not, turning to the step S333;
s331: positioning the PTC heater to have insulation failure, and turning to step S332;
s332: instrument display "PTC heater insulation failure fault";
s333: and the vehicle control unit disconnects all the high-voltage contactors.
Further, in the embodiment of the present application, before sequentially controlling the high-voltage contactors connected to the high-voltage components to be closed according to the set positioning sequence, the method further includes the steps of:
and monitoring whether the insulation resistance value of the whole vehicle reaches a preset threshold value, if so, sending out a fault alarm, controlling the vehicle to be powered off safely, and if not, not operating.
Further, in the embodiment of the present application, the specific step of controlling safe power-off of the vehicle includes:
and the vehicle control unit disconnects the enabling signal of the high-voltage component and controls the high-voltage contactor connected with the high-voltage component to be disconnected so as to safely power off the vehicle.
Specifically, when the high-voltage component is a driving motor, the vehicle control unit generates a zero-torque instruction and a rapid discharge instruction, and sends the zero-torque instruction and the rapid discharge instruction to the driving motor, so that the rotating speed of the driving motor is smaller than a preset rotating speed value, namely, an enabling signal of the driving motor is disconnected, and the high-voltage contactor connected with the driving motor is controlled to be disconnected, so that the driving motor is safely powered off.
Further, in the embodiment of the present application, in the step S4, the step of executing the corresponding fault handling strategy according to the priorities of all the located high-voltage components with insulation failure includes:
controlling all high-voltage contactors connected with all the positioned high-voltage components which are subjected to insulation failure to be in an off state; and executing the fault processing strategy corresponding to the high-voltage component with the highest priority.
Referring to fig. 2, specifically, in the embodiment of the present application, the specific steps of the step S4 include:
s401: controlling all high-voltage contactors connected with all the positioned high-voltage components which are subjected to insulation failure to be in an off state;
s402: judging whether all high-voltage components with insulation failure have high-voltage components with first priority, if so, turning to a step S403, and if not, turning to a step S404;
s403: the vehicle controller controls the vehicle to stop starting or running;
s404, judging whether all high-voltage components with insulation failure have high-voltage components with second priority, if so, turning to the step S405, and if not, turning to the step S406;
s405: the vehicle controller controls the vehicle to limp;
s406: and the vehicle control unit controls the vehicle to normally run.
Referring to fig. 3, an embodiment of the present application further provides a system for automatically positioning an insulation failure high-voltage component of a new energy vehicle, including:
the first setting module is used for carrying out priority classification on different high-voltage components according to the influence degree of the different high-voltage components on the vehicle after insulation failure, the high-voltage components with larger influence degree on the vehicle are higher than the high-voltage components with smaller influence degree on the vehicle, and corresponding fault handling strategies are set for the different priorities;
the second setting module is used for setting the positioning sequence of the high-voltage components according to the priority of different high-voltage components;
the positioning module is used for sequentially controlling the high-voltage contactors connected with the high-voltage components to be closed according to a set positioning sequence, monitoring whether the high-voltage system has insulation failure faults or not, if so, positioning the high-voltage components to have insulation failure, and if not, controlling the high-voltage contactors connected with the next high-voltage component to be closed according to the set positioning sequence until all the high-voltage components with insulation failure are positioned;
and the execution module is used for executing a corresponding fault handling strategy according to the priorities of all the positioned high-voltage components with insulation failures.
The system of new energy vehicle automatic positioning insulation inefficacy high-voltage component of this application embodiment, through setting up the priority to the high-voltage component of difference, and set up the location order of high-voltage component according to the priority, come the closing of the high-voltage contactor that controls in proper order according to the location order again, monitoring system whether takes place insulation inefficacy trouble, thereby the high-voltage component that takes place insulation inefficacy is located, and carry out corresponding fault handling strategy according to the priority of all high-voltage component that take place insulation inefficacy that locate, can realize automatic positioning insulation inefficacy high-voltage component, and carry out corresponding fault handling strategy, need not to wait for that maintenance personal can only handle after arriving at the scene, it is more intelligent, make vehicle dwell time shorter, reduce the influence to normal traffic.
Further, in this embodiment of the present application, the first setting module is specifically configured to:
if the vehicle cannot be started or run after the high-voltage component is subjected to insulation failure, dividing the high-voltage component into a first priority, and setting a fault handling strategy for the first priority to control the vehicle to stop starting or running;
if the vehicle can drive in a limp mode after the high-voltage component is subjected to insulation failure, the high-voltage component is divided into a second priority level, and the fault handling strategy set for the second priority level is used for controlling the vehicle to drive in a limp mode;
and if the vehicle can normally run after the high-voltage component is subjected to insulation failure, dividing the high-voltage component into a third priority, and setting a fault handling strategy for the third priority to control the vehicle to normally run.
Further, in this embodiment of the present application, the second setting module is specifically configured to: the positioning order of the high-voltage components is set in the order of the first priority, the second priority, and the third priority.
Furthermore, in this application embodiment, the system for automatically positioning the insulation failure high-voltage component of the new energy vehicle further includes a monitoring module, which is configured to monitor whether the insulation resistance value of the entire vehicle reaches a preset threshold value before sequentially controlling the high-voltage contactors connected to the high-voltage component to be closed according to the set positioning sequence, and if so, send out a fault alarm and control the vehicle to be powered off safely, and if not, the vehicle is not operated.
It should be noted that, the system for automatically positioning the insulation-failure high-voltage component of the new energy vehicle according to the present application is based on the above method for automatically positioning the insulation-failure high-voltage component of the new energy vehicle, and can be understood as a system that can implement the above method for automatically positioning the insulation-failure high-voltage component of the new energy vehicle.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for automatically positioning an insulation failure high-voltage component of a new energy vehicle is characterized by comprising the following steps:
the method comprises the steps that different high-voltage components are subjected to priority classification according to the influence degree of the different high-voltage components on a vehicle after insulation failure, the high-voltage components with larger influence degree on the vehicle are higher than the high-voltage components with smaller influence degree on the vehicle, and corresponding fault handling strategies are set for the different priorities;
setting the positioning sequence of the high-voltage components according to the priority of different high-voltage components;
sequentially controlling high-voltage contactors connected with the high-voltage components to be closed according to a set positioning sequence, monitoring whether the high-voltage system has an insulation failure fault, if so, positioning that the high-voltage components have the insulation failure, and if not, controlling the high-voltage contactors connected with the next high-voltage components to be closed according to the set positioning sequence until all the high-voltage components having the insulation failure are positioned;
and executing a corresponding fault handling strategy according to the priorities of all the positioned high-voltage components with insulation failure.
2. The method for automatically positioning the insulation failure high-voltage component of the new energy vehicle as claimed in claim 1, wherein the specific steps of prioritizing different high-voltage components according to the influence degree of the different high-voltage components on the vehicle after insulation failure and setting corresponding fault handling strategies for different priorities comprise:
if the vehicle cannot be started or run after the high-voltage component is subjected to insulation failure, dividing the high-voltage component into a first priority, and setting a fault handling strategy for the first priority to control the vehicle to stop starting or running;
if the vehicle can drive in a limp mode after the high-voltage component is subjected to insulation failure, the high-voltage component is divided into a second priority level, and the fault handling strategy set for the second priority level is used for controlling the vehicle to drive in a limp mode;
and if the vehicle can normally run after the high-voltage component is subjected to insulation failure, dividing the high-voltage component into a third priority, and setting a fault handling strategy for the third priority to control the vehicle to normally run.
3. The method for automatically positioning an insulation-failure high-voltage component of a new energy vehicle as claimed in claim 2, wherein the specific step of setting the positioning sequence of the high-voltage components according to the priorities of different high-voltage components comprises:
the positioning order of the high-voltage components is set in the order of the first priority, the second priority, and the third priority.
4. The method for automatically positioning an insulation-failure high-voltage component of a new energy vehicle as claimed in claim 1, wherein before sequentially controlling the high-voltage contactors connected with the high-voltage component to close according to the set positioning sequence, the method further comprises the steps of:
and monitoring whether the insulation resistance value of the whole vehicle reaches a preset threshold value, if so, sending out a fault alarm, controlling the vehicle to be powered off safely, and if not, not operating.
5. The method for automatically positioning the insulation-failure high-voltage component of the new energy vehicle as claimed in claim 4, wherein the specific step of controlling the vehicle to safely power down comprises:
and the vehicle control unit disconnects the enabling signal of the high-voltage component and controls the high-voltage contactor connected with the high-voltage component to be disconnected so as to safely power off the vehicle.
6. The method for automatically positioning an insulation failure high-voltage component of a new energy vehicle as claimed in claim 2, characterized in that:
the high-voltage component of the first priority comprises a power battery system, a driving motor system, a brake air pump or a steering oil pump;
the high-voltage component of the second priority includes a DCDC converter or a fuel cell system;
the high-voltage component of the third priority includes an air conditioner compressor or a PTC heater.
7. The method for the new energy vehicle to automatically locate the insulation-failed high-voltage component as claimed in claim 1, wherein the step of executing the corresponding fault handling strategy according to the priorities of all the located insulation-failed high-voltage components comprises the following steps:
controlling all high-voltage contactors connected with all the positioned high-voltage components which are subjected to insulation failure to be in an off state;
and executing the fault processing strategy corresponding to the high-voltage component with the highest priority.
8. A system for automatically positioning an insulation failure high-voltage component of a new energy vehicle is characterized by comprising:
the first setting module is used for carrying out priority classification on different high-voltage components according to the influence degree of the different high-voltage components on the vehicle after insulation failure, the high-voltage components with larger influence degree on the vehicle are higher than the high-voltage components with smaller influence degree on the vehicle, and corresponding fault handling strategies are set for the different priorities;
the second setting module is used for setting the positioning sequence of the high-voltage components according to the priority of different high-voltage components;
the positioning module is used for sequentially controlling the high-voltage contactors connected with the high-voltage components to be closed according to a set positioning sequence, monitoring whether the high-voltage system has insulation failure faults or not, if so, positioning the high-voltage components to have insulation failure, and if not, controlling the high-voltage contactors connected with the next high-voltage component to be closed according to the set positioning sequence until all the high-voltage components with insulation failure are positioned;
and the execution module is used for executing a corresponding fault handling strategy according to the priorities of all the positioned high-voltage components with insulation failures.
9. The system for automatically locating an insulation failure high voltage component of a new energy vehicle as claimed in claim 8, wherein the first setup module is specifically configured to:
if the vehicle cannot be started or run after the high-voltage component is subjected to insulation failure, dividing the high-voltage component into a first priority, and setting a fault handling strategy for the first priority to control the vehicle to stop starting or running;
if the vehicle can drive in a limp mode after the high-voltage component is subjected to insulation failure, the high-voltage component is divided into a second priority level, and the fault handling strategy set for the second priority level is used for controlling the vehicle to drive in a limp mode;
and if the vehicle can normally run after the high-voltage component is subjected to insulation failure, dividing the high-voltage component into a third priority, and setting a fault handling strategy for the third priority to control the vehicle to normally run.
10. The system for automatically locating an insulation failure high voltage component of a new energy vehicle as claimed in claim 9, wherein the second setup module is specifically configured to: the positioning order of the high-voltage components is set in the order of the first priority, the second priority, and the third priority.
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