CN106696709B - Control method and device for voltage fault of vehicle direct-current bus - Google Patents
Control method and device for voltage fault of vehicle direct-current bus Download PDFInfo
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- CN106696709B CN106696709B CN201611046089.0A CN201611046089A CN106696709B CN 106696709 B CN106696709 B CN 106696709B CN 201611046089 A CN201611046089 A CN 201611046089A CN 106696709 B CN106696709 B CN 106696709B
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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
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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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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Abstract
The invention provides a control method and a device for a vehicle direct-current bus voltage fault, wherein the control method for the vehicle direct-current bus voltage fault comprises the following steps: detecting whether the voltage of a direct current bus obtained on the integrated controller is in a normal state; if the voltage of the direct current bus obtained through the integrated controller is not in a normal state, determining a fault level according to working parameters of a plurality of components connected with the direct current bus; and executing a preset processing mechanism corresponding to the fault level according to the fault level. When the voltage of the direct current bus has a fault, the severity of the fault of the vehicle is judged according to the working parameters of the components connected with the direct current bus, and a processing mechanism corresponding to the fault level is executed at each fault level, so that the driving feeling of a driver can be ensured on the premise of ensuring safe driving of the vehicle.
Description
Technical field
The present invention relates to the voltage failure field of vehicle DC bus, especially a kind of vehicle DC busbar voltage failure
Control method and device.
Background technique
In face of increasingly severe energy and environment problem, energy conservation is just becoming the heat of current various countries' research with new-energy automobile
Point.In China, energy conservation has obtained the great attention of government and industry with new-energy automobile, and is set to emerging strategic production
One of industry.As one kind of energy conservation and new-energy automobile, pure electric automobile has emission-free discharge, energy dose-effect in the process of moving
The multiple advantages such as rate height, low, the recoverable energy of noise, therefore pure electric automobile is greatly developed to Chinese energy safety, ring
Border protection is of great significance.
With the fast development of pure electric automobile, integrated control becomes the trend of pure electric automobile current development.Integrated control
System, as its name suggests, that is, relies on the computing capability that microprocessor is powerful at this stage, function and external resource abundant will be responsible for not
The effective together as one of the separate controller of congenerous is realized originally complete by multiple independent controls by common hardware resource
At function.Integrated control can not only save hardware resource, reduce controller cost, simultaneously because system is integrated,
Therefore whole reliability is improved in terms of another one.Battery, motor, the automatically controlled three big core technologies for pure electric automobile,
In this context, the collection of battery management system (BMS), electric machine controller (MCU) and entire car controller (VCU) function is integrated
Become the important directions of current pure electric automobile integrated control development at controller.
The sole energy source of pure electric automobile be high voltage power battery, high voltage power battery by DC bus with it is other
High voltage parts are connected, and provide the energy for it, including DC/DC, compressor of air conditioner (EAS), air-conditioning electric heating system
(PTC), integrated manipulator (including the motor directly driven by integrated manipulator) etc..Accurate and effective inspection to DC bus-bar voltage
Survey is the basic premise realizing vehicle and operating normally, and is related to fault detection (such as the under-voltage fault detection, over-voltage fault of vehicle
Detection), vehicle protection limitation (over-voltage or it is under-voltage when safeguard measure), energy regenerating control (energy regenerating plan when over-voltage
Slightly), motor control (permanent magnet synchronous motor maximum torque per ampere control, weak magnetic control, torque capacity voltage are than control) etc. is more
Aspect, it can be seen that its importance.Current vast pure electric automobile production firm and relevant research institution are to DC bus
Security mechanism when voltage detecting failure is studied, and provides relevant security strategy, but these security strategies are not to build
It stands on the basis of integrated manipulator, while the security strategy provided is more rough, such as when vehicle can not detect DC bus
Voltage is then immediately performed zero torque, closes motor IGBT output and the operation such as electricity under high pressure immediately, although the above security mechanism
Can guarantee driving safety to a certain extent, but be affected, can seriously drop to the driving of driver and passengers inside the car impression
The driving of low user is experienced.
Summary of the invention
Technical problems to be solved of the embodiment of the present invention are to provide a kind of control method of vehicle DC busbar voltage failure
And device, farthest to guarantee that the driving of occupant is experienced under the premise of guaranteeing traffic safety.
In order to solve the above technical problems, the control method of vehicle DC busbar voltage failure provided in an embodiment of the present invention,
Include:
Whether the DC bus-bar voltage obtained on detection integrated manipulator is normal condition；
It is more according to what is connect with DC bus if not being normal condition by the DC bus-bar voltage that integrated manipulator obtains
The running parameter of a component, determines fault level；
According to the fault level, default treatment mechanism corresponding with the fault level is executed.
Preferably, the running parameter for multiple components that the basis is connect with DC bus, the step of determining fault level
Include:
Detect the working condition for the power battery connecting with DC bus；
If the working condition of the power battery is non-malfunction, determine that the fault level is first preset failure etc.
Grade；
If the working condition of the power battery is malfunction, detection be connected to integrated manipulator and DC bus it
Between multiple high voltage components present input voltage；
According to the present input voltage of the high voltage component, the maximum operation of DC bus-bar voltage estimation is carried out, is obtained
Voltage max after the DC bus estimation, and the minimum operation of DC bus-bar voltage estimation is carried out, described in acquisition
Voltage minimum after DC bus estimation；
If the voltage max is greater than the voltage minimum, determine that the fault level is the second predetermined level；
If the voltage max is less than the voltage minimum, determine that the fault level is third predetermined level.
Preferably, the control method further include:
When the fault level is the first predetermined level, the current output voltage of power battery is obtained；
According to the current output voltage of the power battery, DC bus-bar voltage estimation is carried out, the DC bus is obtained
First voltage after estimation；
According to the first voltage, vehicle is controlled.
Preferably, the control method further include:
When the fault level is the second predetermined level, according to the voltage max and the voltage minimum, obtain
The second voltage of DC bus after must estimating；
According to the second voltage, the vehicle is controlled.
Preferably, described according to the fault level, execute the step of default treatment mechanism corresponding with the fault level
Suddenly include:
When the fault level of the vehicle is the first predetermined level, the instrument for controlling the vehicle shows the first default letter
Breath；
When the fault level of the vehicle is the second predetermined level, the instrument for controlling the vehicle shows the second default letter
The drive system alarm lamp starting for ceasing, controlling the vehicle, the motor max. output torque for controlling the vehicle are decreased to first
Predetermined torque value, and the motor maximum (top) speed of the control vehicle are reduced to the first preset rotation speed value；
When the fault level of the vehicle is third predetermined level, the default letter of instrument output third of the vehicle is controlled
Breath, controls the Full Vehicle System trouble light starting of the vehicle, and the max. output torque for controlling the motor of the vehicle is decreased to the
Two predetermined torque values, and the revolving speed of the control vehicle are reduced to the second preset rotation speed value, and the second predetermined torque value is small
In the first predetermined torque value, the second preset rotation speed value is less than the first preset rotation speed value.
Preferably, according to the present input voltage of the high voltage component, pass through formula
Obtain the voltage max and the voltage minimum；Wherein, I is to be connected to integrated manipulator and DC bus
Between high voltage component quantity, UiFor the present input voltage of first of high voltage component, KiFor first of high voltage component
Voltage detection error coefficient.
Preferably, according to the current output voltage of the power battery, DC bus-bar voltage estimation is carried out, formula is passed through
UDC=Ubatt-Rk*IDc
First voltage U after obtaining the DC bus estimationDC, wherein UbattFor the current output of the power battery
Voltage, RkFor a constant, IDCFor the electric current of the DC bus.
Preferably, according to the voltage max and the voltage minimum, pass through formula
The second voltage U of DC bus after being estimatedDC, wherein UmaxFor the voltage max, UminFor the electricity
Press minimum value.
According to another aspect of the present invention, the present invention also provides a kind of control of vehicle DC busbar voltage failure dresses
It sets, comprising:
Detection module, for detecting whether the DC bus-bar voltage obtained on integrated manipulator is normal condition；
Determining module, if the DC bus-bar voltage for being obtained by integrated manipulator is not normal condition, according to it is straight
The running parameter for flowing multiple components of bus connection, determines fault level；
Execution module, for executing default treatment mechanism corresponding with the fault level according to the fault level.
Preferably, the determining module includes:
First detection unit, for detecting the working condition for the power battery connecting with DC bus；
First determination unit determines described failure etc. if the working condition for the power battery is non-malfunction
Grade is the first preset failure grade；
Second detection unit, if the working condition for the power battery is malfunction, detection is connected to integrated
The present input voltage of multiple high voltage components between controller and DC bus；
First obtains unit carries out DC bus-bar voltage estimation for the present input voltage according to the high voltage component
Maximum operation, the voltage max after obtaining DC bus estimation, and carry out DC bus-bar voltage estimation most
Small value operation, the voltage minimum after obtaining the DC bus estimation；
Second determination unit determines the fault level if being greater than the voltage minimum for the voltage max
For the second predetermined level；
Third determination unit determines the fault level if being less than the voltage minimum for the voltage max
For third predetermined level.
Preferably, the control device further include:
First obtains module, for obtaining the current defeated of power battery when the fault level is the first predetermined level
Voltage out；
Second obtains module, for the current output voltage according to the power battery, carries out DC bus-bar voltage estimation,
First voltage after obtaining the DC bus estimation；
First control module, for controlling vehicle according to the first voltage.
Preferably, the control device further include:
Third obtains module, for when the fault level is the second predetermined level, according to the voltage max and
The voltage minimum, the second voltage of the DC bus after being estimated；
Second control module, for controlling the vehicle according to the second voltage.
Preferably, the execution module includes:
First execution unit, for the fault level in the vehicle be the first predetermined level when, control the vehicle
Instrument shows the first presupposed information；
Second execution unit, for the fault level in the vehicle be the second predetermined level when, control the vehicle
Instrument shows the second presupposed information, the drive system alarm lamp of the control vehicle starts, controls the motor maximum of the vehicle
Output torque is decreased to the first predetermined torque value, and the motor maximum (top) speed of the control vehicle is reduced to the first preset rotation speed
Value；
Third execution unit, for the fault level in the vehicle be third predetermined level when, control the vehicle
Instrument exports third presupposed information, controls the Full Vehicle System trouble light starting of the vehicle, controls the motor of the vehicle most
Big output torque is decreased to the second predetermined torque value, and the revolving speed of the control vehicle is reduced to the second preset rotation speed value, institute
The second predetermined torque value is stated less than the first predetermined torque value, the second preset rotation speed value is less than first preset rotation speed
Value.
Preferably, the first obtains unit passes through formula according to the present input voltage of the high voltage component
Obtain the voltage max UmaxWith the voltage minimum Umin；Wherein, i is to be connected to integrated manipulator and straight
Flow the quantity of the high voltage component between bus, UiFor the present input voltage of i-th of high voltage component, KiFor i-th of height
The voltage detection error coefficient of splenium part.
Preferably, described second module is obtained according to the current output voltage of the power battery, carry out DC bus electricity
Pressure estimation, passes through formula
UDC=Ubatt-Rk*IDc
First voltage U after obtaining the DC bus estimationDC, wherein UbattFor the current output of the power battery
Voltage, RkFor a constant, IDCFor the electric current of the DC bus.
Preferably, the third obtains module according to the voltage max and the voltage value, passes through formula
The second voltage of DC bus after being estimated, wherein UmaxFor the voltage max, UminFor the voltage
Minimum value.
Compared with prior art, the control method of vehicle DC busbar voltage failure provided in an embodiment of the present invention, at least
It has the advantages that
By DC bus voltage failure when, according to the running parameter for the multiple components being connect with DC bus
Go the severity for judging the failure of vehicle, in each fault level, be implemented in the corresponding treatment mechanism of the fault level, make
Automobile is obtained in the driving impression for guaranteeing to can also ensure that driver under the premise of safety traffic.
Detailed description of the invention
Fig. 1 is the structural representation of the control method of vehicle DC busbar voltage failure described in first embodiment of the invention
Figure；
Fig. 2 is the structural representation of the control method of vehicle DC busbar voltage failure described in second embodiment of the invention
Figure；
Fig. 3 is the structural representation of the control method of vehicle DC busbar voltage failure described in third embodiment of the invention
Figure；
Fig. 4 is the structural representation of the control method of vehicle DC busbar voltage failure described in fourth embodiment of the invention
Figure；
Fig. 5 is the structural representation of the control method of vehicle DC busbar voltage failure described in fifth embodiment of the invention
Figure；
Fig. 6 is that the specific structure of the control device of vehicle DC busbar voltage failure described in sixth embodiment of the invention shows
It is intended to.
Fig. 7 is the specific structure of the control device of vehicle DC bus piezoelectric voltage failure described in sixth embodiment of the invention
Schematic diagram.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.In the following description, such as specific configuration is provided and the specific detail of component is only
In order to help comprehensive understanding the embodiment of the present invention.It therefore, it will be apparent to those skilled in the art that can be to reality described herein
Example is applied to make various changes and modifications without departing from scope and spirit of the present invention.In addition, for clarity and brevity, it is omitted pair
The description of known function and construction.
First embodiment
Referring to Fig.1, the embodiment of the invention provides a kind of control methods of vehicle DC busbar voltage failure, comprising:
Step 101, detect whether the DC bus-bar voltage obtained on integrated manipulator is normal condition；
Step 102, if by integrated manipulator obtain DC bus-bar voltage be not normal condition, according to DC bus
The running parameter of multiple components of connection, determines fault level；
Step 103, according to the fault level, default treatment mechanism corresponding with the fault level is executed.
Under normal condition, integrated manipulator directly acquires the voltage value on DC bus should be in a predetermined voltage range
Interior, integrated manipulator is worked normally by the components that the voltage value of DC bus controls automobile.
The DC bus-bar voltage being directly obtained on detecting integrated manipulator is not the normal condition voltage not at this
In predetermined voltage range, namely show that failure occurs in the voltage of DC bus.At this point, by being connected with DC bus
The running parameter of multiple components judges the fault level of automobile, and according to the severity of fault level, so that automobile
Execute default treatment mechanism corresponding with the fault level.
By the above method, enable to automobile under the premise of guaranteeing safety traffic, additionally it is possible to full to the full extent
The driving of sufficient driver is experienced.
Second embodiment
Referring to Fig. 2, the control method for the vehicle DC busbar voltage failure that second embodiment of the invention provides includes:
Step 201, detect whether the DC bus-bar voltage obtained on integrated manipulator is normal condition；
Step 202, if not being normal condition by the DC bus-bar voltage that integrated manipulator obtains, detection is female with direct current
The working condition of the power battery of line connection；
Step 203, if the working condition of the power battery is non-malfunction, determine that the fault level is first pre-
If fault level；
Step 204, if the working condition of the power battery is malfunction, detection is connected to integrated manipulator and straight
Flow the present input voltage of multiple high voltage components between bus；
Step 205, according to the present input voltage of the high voltage component, the maximum value fortune of DC bus-bar voltage estimation is carried out
It calculates, the voltage max after obtaining the DC bus estimation, and carries out the minimum operation of DC bus-bar voltage estimation, obtain
Voltage minimum after obtaining the DC bus estimation；
Step 206, if the voltage max is greater than the voltage minimum, determine that the fault level is second default
Grade；
Step 207, if the voltage max is less than the voltage minimum, determine that the fault level is default for third
Grade；
Step 208, the fault level determined according to step 203, step 206 and step 207, execution and the failure etc.
The corresponding default treatment mechanism of grade.
The first above-mentioned predetermined level is minor failure grade, and the second predetermined level is moderate fault level, and third is default
Grade is severe fault level.
Above-mentioned high voltage component includes power adapter DC/DC, the sky being set between DC bus and integrated manipulator
Adjust the components such as compressor EAS, air-conditioning voltage hot systems PTC.
In above-mentioned steps 205, according to the present input voltage of high voltage component, pass through formula
Obtain the voltage max and the voltage minimum；Wherein, I is to be connected to integrated manipulator and DC bus
Between high voltage component quantity, UiFor the present input voltage of first of high voltage component, KiFor first of high voltage component
Voltage detection error coefficient.
When the working condition for detecting power battery is in working condition, since power battery is to break down, for vehicle
Normal control demand influence it is smaller it is thus regarded that vehicle fault level be the first predetermined level, namely determine automobile at
In minor failure grade.
When the working condition of power battery is malfunction, by being connected between DC bus and integrated manipulator
The present input voltage of multiple high voltage components estimates the voltage max and voltage minimum of DC bus, by estimation
The validation checking of voltage max and voltage minimum out judges the fault level of vehicle for moderate grade or serious etc.
Grade.
The voltage max and voltage minimum of the above-mentioned DC bus obtained by high voltage component estimation with directly lead to
It is relatively large to cross existing error between the voltage value for the DC bus that integrated manipulator is got, thus is in power battery
When malfunction, assert that the fault level of automobile at least belongs to moderate fault level, belongs to when to the fault level of automobile
The voltage max and voltage minimum for the DC bus that degree or severe are then obtained according to estimation are judged.In normal condition
Under, the voltage max obtained by above-mentioned formula should be greater than voltage minimum, under such state, due to power battery
It is broken down and the estimation voltage of DC bus that is obtained using such mode is with certain error, thus by vehicle
Fault level is determined as the second predetermined level namely moderate grade；When the voltage max estimated is less than voltage minimum,
Then think that this kind of situation is in vain, since power battery is malfunction and is obtained according to the present input voltage of high voltage parts
DC bus voltage max and voltage minimum be also invalid, thus it is pre- that the fault level of vehicle is determined as third
If grade namely severe grade.
Second embodiment of the invention is on the basis of first embodiment, according to the work for the multiple components connecting with DC bus
The specific grade of fault level is determined as parameter, has carried out further explanation.The method recorded using the second embodiment, energy
It is enough accurately to determine fault level locating for vehicle.
3rd embodiment
Third embodiment of the invention provides a kind of control method of vehicle DC busbar voltage failure, comprising:
Step 301, detect whether the DC bus-bar voltage obtained on integrated manipulator is normal condition；
Step 302, if not being normal condition by the DC bus-bar voltage that integrated manipulator obtains, detection and DC bus
The working condition of the power battery of connection；
Step 303, if the working condition of the power battery is non-malfunction, determine that the fault level is first pre-
If fault level；
Step 304, if the working condition of the power battery is malfunction, detection is connected to integrated manipulator and straight
Flow the present input voltage of multiple high voltage components between bus；
Step 305, according to the present input voltage of the high voltage component, the maximum value fortune of DC bus-bar voltage estimation is carried out
It calculates, the voltage max after obtaining the DC bus estimation, and carries out the minimum operation of DC bus-bar voltage estimation, obtain
Voltage minimum after obtaining the DC bus estimation；
Step 306, if the voltage max is greater than the voltage minimum, determine that the fault level is second default
Grade；
Step 307, if the voltage max is less than the voltage minimum, determine that the fault level is default for third
Grade；
Step 308, the fault level recorded according to step 303, step 306 and step 307 executes and the fault level
Corresponding default treatment mechanism；
Step 309, when the fault level is the first predetermined level, the current output voltage of power battery is obtained；
Step 310, according to the current output voltage of the power battery, DC bus-bar voltage estimation is carried out, described in acquisition
First voltage after DC bus estimation；
Step 311, according to the first voltage, vehicle is controlled.
The voltage for the DC bus estimated in third embodiment of the invention by the present input voltage of high voltage component is maximum
The method recorded in the method for value and voltage minimum and above-mentioned second embodiment is consistent, here, repeating no more.
In above-mentioned steps 310, according to the current output voltage of power battery, pass through formula
UDC=Ubatt-Rk*IDc
First voltage after obtaining the DC bus estimation, wherein UbattFor the current output electricity of the power battery
Pressure, RkFor a constant, IDCFor the electric current of the DC bus.
It is to be connected in series by connectors such as relays between DC bus and power battery, above-mentioned RkIt represents
The resistance of the connector, numerical value are a given value.When the working condition of power battery is normal operating conditions, pass through power
The accuracy of the first voltage for the DC bus estimated that the current output voltage of battery obtains is higher, straight by what is estimated
The first voltage of stream bus can make auto parts and components be worked normally, and can satisfy the normal control demand of vehicle.
In third embodiment of the invention, the estimation voltage of DC bus is obtained by the current output voltage of power battery
Method, so that automobile needs that work can also be normally carried out by the auto parts and components of the voltage power supply of DC bus.Also, this
In invention 3rd embodiment, additionally it is possible to accurately be judged the fault level of automobile, so that automobile is before safety traffic
Put can also to greatest extent on meet the good of riding comfort.
Fourth embodiment
Fourth embodiment of the invention provides a kind of control method of vehicle DC busbar voltage failure, comprising:
Step 401, detect whether the DC bus-bar voltage obtained on integrated manipulator is normal condition；
Step 402, if not being normal condition by the DC bus-bar voltage that integrated manipulator obtains, detection and DC bus
The working condition of the power battery of connection；
Step 403, if the working condition of the power battery is non-malfunction, determine that the fault level is first pre-
If fault level；
Step 404, if the working condition of the power battery is malfunction, detection is connected to integrated manipulator and straight
Flow the present input voltage of multiple high voltage components between bus；
Step 405, according to the present input voltage of the high voltage component, the maximum value fortune of DC bus-bar voltage estimation is carried out
It calculates, the voltage max after obtaining the DC bus estimation, and carries out the minimum operation of DC bus-bar voltage estimation, obtain
Voltage minimum after obtaining the DC bus estimation；
Step 406, if the voltage max is greater than the voltage minimum, determine that the fault level is second default
Grade；
Step 407, if the voltage max is less than the voltage minimum, determine that the fault level is default for third
Grade；
Step 408, the fault level recorded according to step 403, step 406 and step 407 executes and the fault level
Corresponding default treatment mechanism；
Step 409, when the fault level is the second predetermined level, most according to the voltage max and the voltage
Small value, the second voltage of the DC bus after being estimated；
Step 410, according to the second voltage, the vehicle is controlled.
In fourth embodiment of the invention, the voltage max and voltage for the acquisition DC bus recorded in step 405 are minimum
The mode recorded in the mode of value and second embodiment and 3rd embodiment is consistent, here, not repeating.
In above-mentioned step 409, according to voltage max and voltage minimum, pass through formula
The second voltage of DC bus after being estimated, wherein UmaxFor the voltage max, UminFor the voltage
Minimum value.
The fourth embodiment of the present invention, by the fault level in automobile be the second predetermined level when, according to high pressure zero
The second voltage of the DC bus for the estimation that the present input voltage of part obtains guarantees what vehicle was directly acquired in integrated manipulator
Guarantee that automobile can be just when DC bus-bar voltage breaks down and can not estimate the voltage of DC bus by power battery
Often work.
When judging that power battery is in malfunction, can not be estimated further according to the present input voltage of power battery
The voltage value of DC bus, at this point, passing through the current input for the high voltage component being set between DC bus and integrated manipulator
Voltage estimates the voltage of DC bus, so that automobile can still work normally.
On the basis of the fourth embodiment of the present invention, judge that fault level is third predetermined level working as, namely
When menace level, at this point, due to and voltage max and voltage minimum can not be obtained by estimation and obtain DC bus
It estimates that voltage, automobile can not also be worked normally, in this case, output torque then can be performed to the control of vehicle and be reduced to
Zero, the operation such as electricity under motor IFBT output and high pressure is closed.
5th embodiment
Fifth embodiment of the invention provides a kind of control method of vehicle DC busbar voltage failure, comprising:
Step 501, detect whether the DC bus-bar voltage obtained on integrated manipulator is normal condition；
Step 502, if not being normal condition by the DC bus-bar voltage that integrated manipulator obtains, detection and DC bus
The working condition of the power battery of connection；
Step 503, if the working condition of the power battery is non-malfunction, determine that the fault level is first pre-
If fault level；
Step 504, if the working condition of the power battery is malfunction, detection is connected to integrated manipulator and straight
Flow the present input voltage of multiple high voltage components between bus；
Step 505, according to the present input voltage of the high voltage component, the maximum value fortune of DC bus-bar voltage estimation is carried out
It calculates, the voltage max after obtaining the DC bus estimation, and carries out the minimum operation of DC bus-bar voltage estimation, obtain
Voltage minimum after obtaining the DC bus estimation；
Step 506, if the voltage max is greater than the voltage minimum, determine that the fault level is second default
Grade；
Step 507, if the voltage max is less than the voltage minimum, determine that the fault level is default for third
Grade；
Step 508, when the fault level of the vehicle is the first predetermined level, the instrument for controlling the vehicle shows the
One presupposed information；
Step 509, when the fault level of the vehicle is the second predetermined level, the instrument for controlling the vehicle shows the
The motor max. output torque that two presupposed informations, the drive system alarm lamp for controlling the vehicle start, control the vehicle subtracts
As low as the first predetermined torque value, and the motor maximum (top) speed of the control vehicle are reduced to the first preset rotation speed value；
Step 510, when the fault level of the vehicle is third predetermined level, the instrument output the of the vehicle is controlled
Three presupposed informations control the Full Vehicle System trouble light starting of the vehicle, control the max. output torque of the motor of the vehicle
It is decreased to the second predetermined torque value, and the revolving speed of the control vehicle is reduced to the second preset rotation speed value, described second is default
Torque value is less than the first predetermined torque value, and the second preset rotation speed value is less than the first preset rotation speed value.
In the present invention, estimate that the voltage max of DC bus and voltage are minimum by the present input voltage of high voltage component
The mode of value is consistent with the method in above-mentioned second embodiment, 3rd embodiment and the 5th embodiment, here, repeating no more.
The default text information of above-mentioned first is that " minor failure occurs for vehicle, it is proposed that maintenace point is gone to examine vehicle
It repairs, which does not influence normally to drive a vehicle "；The default text information of above-mentioned second is that " vehicle breaks down, and power output will be by
Limitation, asks safe driving and goes to maintenace point to overhaul vehicle as early as possible "；It is " vehicle that above-mentioned third, which presets text information,
It breaks down, is please contacted as early as possible by vehicle drive to safety area and with after-sales service personnel ".
When the malfunction of automobile is the first predetermined level, since power battery is without failure, power can be passed through
The current output voltage of battery estimates the voltage value of DC bus, also, the direct current due to being estimated using such mode is female
The precision of line voltage value is higher, thus influence caused by the normal control demand for vehicle is very small, therefore only passes through instrument
Prompt driver vehicle has occurred and that minor failure, achievees the effect that driver is reminded to drive with caution.
When the fault level of automobile is the second predetermined level, due to being estimated according to the present input voltage of high voltage component
DC bus voltage precision it is relatively low, may have to the full-vehicle control of automobile and have a certain impact, thus pass through
The maximum (top) speed of max. output torque and vehicle to motor limits, to guarantee the traffic safety of automobile.
When the fault level of automobile is third predetermined level, due to can not obtain the voltage value of DC bus, make
The full-vehicle control of vehicle is obtained by large effect, under such state, further by the max. output torque of motor and vehicle
Maximum (top) speed reduce, stop the energy regenerating of vehicle, reach under the premise of guaranteeing traffic safety, so that the driving of driver
Impression is unaffected.
In 5th embodiment, to the default treatment mechanism according to performed by the severity for the vehicle trouble grade judged
Detailed explanation is carried out, by three kinds of above-mentioned default treatment mechanisms, under the premise of guaranteeing traffic safety to the greatest extent
The driving of driver is protected to experience.
Referring to Fig. 6, it is female that a kind of vehicle DC is additionally provided according to another aspect of the present invention, in sixth embodiment of the invention
The control device of line voltage failure, comprising:
Detection module 1, for detecting whether the DC bus-bar voltage obtained on integrated manipulator is normal condition；
Determining module 2, if the DC bus-bar voltage for being obtained by integrated manipulator is not normal condition, according to it is straight
The running parameter for flowing multiple components of bus connection, determines fault level；
Execution module 3, for executing default treatment mechanism corresponding with the fault level according to the fault level.
The control device of the vehicle DC busbar voltage failure provided through the invention passes through basis and DC bus current
The running parameters of multiple components determine the fault level of vehicle, execute corresponding processing further according to the severity of fault level
Mechanism, so that under the premise of guaranteeing vehicle safe driving, additionally it is possible to guarantee that the driving impression of occupant is not affected.
Referring to Fig. 7, in sixth embodiment of the invention, the determining module 2 includes:
First detection unit 21, for detecting the working condition for the power battery connecting with DC bus；
First determination unit 22 determines the failure if the working condition for the power battery is non-malfunction
Grade is the first preset failure grade；
Second detection unit 23, if the working condition for the power battery is malfunction, detection is connected to collection
At the present input voltage of multiple high voltage components between controller and DC bus；
First obtains unit 24 carries out DC bus-bar voltage and estimates for the present input voltage according to the high voltage component
The maximum operation of calculation, the voltage max after obtaining the DC bus estimation, and carry out DC bus-bar voltage estimation
Minimum operation, the voltage minimum after obtaining the DC bus estimation；
Second determination unit 25 determines described failure etc. if being greater than the voltage minimum for the voltage max
Grade is the second predetermined level；
Third determination unit 26 determines described failure etc. if being less than the voltage minimum for the voltage max
Grade is third predetermined level.
Referring to Fig. 7, in sixth embodiment of the invention, the control device further include:
First obtains module 4, for obtaining the current defeated of power battery when the fault level is the first predetermined level
Voltage out；
Second obtains module 5, for the current output voltage according to the power battery, carries out DC bus-bar voltage and estimates
It calculates, the first voltage after obtaining the DC bus estimation；
First control module 6, for controlling vehicle according to the first voltage.
Referring to Fig. 7, in sixth embodiment of the invention, the control device further include:
Third obtains module 7, for when the fault level is the first predetermined level, according to the voltage max and
The voltage minimum, the second voltage of the DC bus after being estimated；
Second control module 8, for controlling the vehicle according to the second voltage.
Referring to Fig. 7, in sixth embodiment of the invention, the execution module 3 includes:
First execution unit 31, for the fault level in the vehicle be the first predetermined level when, control the vehicle
Instrument show the first presupposed information；
Second execution unit 32, for the fault level in the vehicle be the second predetermined level when, control the vehicle
Instrument show the second presupposed information, the control vehicle the starting of drive system alarm lamp, control the motor of the vehicle most
Big output torque is decreased to the first predetermined torque value and the motor maximum (top) speed of the control vehicle is reduced to first default turn
Speed value；
Third execution unit 33, for the fault level in the vehicle be third predetermined level when, control the vehicle
Instrument export third presupposed information, control the vehicle Full Vehicle System trouble light starting, control the motor of the vehicle
Max. output torque is decreased to the second predetermined torque value, and the revolving speed of the control vehicle is reduced to the second preset rotation speed value,
The second predetermined torque value is less than the first predetermined torque value, and the second preset rotation speed value is less than described first default turn
Speed value.
Specifically, the first obtains unit 24 passes through formula according to the present input voltage of the high voltage component
Obtain the voltage max UmaxWith the voltage minimum Umin；Wherein, i is to be connected to integrated manipulator and straight
Flow the quantity of the high voltage component between bus, UiFor the present input voltage of i-th of high voltage component, KiFor i-th of height
The voltage detection error coefficient of splenium part.
Specifically, described second obtains module 5 according to the current output voltage of the power battery, DC bus electricity is carried out
Pressure estimation, passes through formula
UDC=Ubatt-Rk*IDc
First voltage U after obtaining the DC bus estimationDC, wherein UbattFor the current output of the power battery
Voltage, RkFor a constant, IDCFor the electric current of the DC bus.
Specifically, the third obtains module 7 according to the voltage max and the voltage minimum, pass through formula
The second voltage U of DC bus after being estimatedDC, wherein UmaxFor the voltage max, UminFor the electricity
Press minimum value.
The control device of the vehicle DC bus-bar fault provided through the invention, multiple according to being connect with DC bus
After the running parameter of component judges the fault level of vehicle, corresponding place is executed to vehicle according to specific fault level degree
Reason mechanism；Also, the control device of vehicle DC busbar voltage failure of the invention, can in DC bus-bar voltage failure root
The voltage value of DC bus is estimated according to the current output voltage of power battery or the present input voltage of multiple high voltage components,
So that in DC bus-bar voltage failure, additionally it is possible to control needed on automobile by DC bus voltage power supply components into
Row works normally.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (14)
1. a kind of control method of vehicle DC busbar voltage failure characterized by comprising
Whether the DC bus-bar voltage that obtains is normal condition on detection integrated manipulator, and under normal condition, integrated manipulator is obtained
The voltage value on DC bus taken is in a predetermined voltage range；
If not being normal condition by the DC bus-bar voltage that integrated manipulator obtains, according to the multiple portions being connect with DC bus
The running parameter of part, determines fault level；
According to the fault level, default treatment mechanism corresponding with the fault level is executed；
The running parameter for multiple components that the basis is connect with DC bus, the step of determining fault level include:
Detect the working condition for the power battery connecting with DC bus；
If the working condition of the power battery is non-malfunction, determine that the fault level is the first predetermined level；
If the working condition of the power battery is malfunction, detection is connected between integrated manipulator and DC bus
The present input voltage of multiple high voltage components；
According to the present input voltage of the high voltage component, the maximum operation of DC bus-bar voltage estimation is carried out, described in acquisition
Voltage max after DC bus estimation, and the minimum operation of DC bus-bar voltage estimation is carried out, obtain the direct current
Voltage minimum after bus estimation；
If the voltage max is greater than the voltage minimum, determine that the fault level is the second predetermined level；
If the voltage max is less than the voltage minimum, determine that the fault level is third predetermined level.
2. the control method of vehicle DC busbar voltage failure according to claim 1, which is characterized in that the controlling party
Method further include:
When the fault level is the first predetermined level, the current output voltage of power battery is obtained；
According to the current output voltage of the power battery, DC bus-bar voltage estimation is carried out, obtains the DC bus estimation
First voltage afterwards；
According to the first voltage, vehicle is controlled.
3. the control method of vehicle DC busbar voltage failure according to claim 1, which is characterized in that the controlling party
Method further include:
When the fault level is the second predetermined level, according to the voltage max and the voltage minimum, estimated
The second voltage of DC bus after calculation；
According to the second voltage, the vehicle is controlled.
4. the control method of vehicle DC busbar voltage failure according to claim 1, which is characterized in that described according to institute
The step of stating fault level, executing default treatment mechanism corresponding with the fault level include:
When the fault level of the vehicle is the first predetermined level, the instrument for controlling the vehicle shows the first presupposed information；
The vehicle fault level be the second predetermined level when, control the vehicle instrument show the second presupposed information,
It is default that the drive system alarm lamp starting for controlling the vehicle, the motor max. output torque for controlling the vehicle are decreased to first
Torque value, and the motor maximum (top) speed of the control vehicle are reduced to the first preset rotation speed value；
When the fault level of the vehicle is third predetermined level, the instrument output third presupposed information of the vehicle is controlled,
The Full Vehicle System trouble light starting for controlling the vehicle, the max. output torque for controlling the motor of the vehicle are decreased to second in advance
If torque value, and the revolving speed of the control vehicle are reduced to the second preset rotation speed value, the second predetermined torque value is less than institute
The first predetermined torque value is stated, the second preset rotation speed value is less than the first preset rotation speed value.
5. the control method of vehicle DC busbar voltage failure according to claim 1, which is characterized in that according to the height
The present input voltage of splenium part, passes through formula
Obtain the voltage max UmaxWith the voltage minimum Umin；Wherein, i is to be connected to integrated manipulator and direct current mother
The quantity of high voltage component between line, UiFor the present input voltage of i-th of high voltage component, KiFor i-th of high-voltage section
The voltage detection error coefficient of part.
6. the control method of vehicle DC busbar voltage failure according to claim 2, which is characterized in that according to described dynamic
The current output voltage of power battery carries out DC bus-bar voltage estimation, passes through formula
UDC=Ubatt-Rk*IDC
First voltage U after obtaining the DC bus estimationDC, wherein UbattFor the current output voltage of the power battery,
RkFor a constant, IDCFor the electric current of the DC bus.
7. the control method of vehicle DC busbar voltage failure according to claim 3, which is characterized in that according to the electricity
Maximum value and the voltage minimum are pressed, formula is passed through
The second voltage U of DC bus after being estimatedDC, wherein UmaxFor the voltage max, UminMost for the voltage
Small value.
8. a kind of control device of vehicle DC busbar voltage failure characterized by comprising
Detection module, for detecting whether the DC bus-bar voltage obtained on integrated manipulator is normal condition, under normal condition,
The voltage value on DC bus that integrated manipulator obtains is in a predetermined voltage range；
Determining module, if the DC bus-bar voltage for being obtained by integrated manipulator is not normal condition, according to female with direct current
The running parameter of multiple components of line connection, determines fault level；
Execution module, for executing default treatment mechanism corresponding with the fault level according to the fault level；
The determining module includes:
First detection unit, for detecting the working condition for the power battery connecting with DC bus；
First determination unit determines that the fault level is if the working condition for the power battery is non-malfunction
First predetermined level；
Second detection unit, if the working condition for the power battery is malfunction, detection is connected to integrated control
The present input voltage of multiple high voltage components between device and DC bus；
First obtains unit carries out DC bus-bar voltage estimation most for the present input voltage according to the high voltage component
Big value operation, the voltage max after obtaining the DC bus estimation, and carry out the minimum value of DC bus-bar voltage estimation
Operation, the voltage minimum after obtaining the DC bus estimation；
Second determination unit determines that the fault level is the if being greater than the voltage minimum for the voltage max
Two predetermined levels；
Third determination unit determines that the fault level is the if being less than the voltage minimum for the voltage max
Three predetermined levels.
9. the control device of vehicle DC busbar voltage failure according to claim 8, which is characterized in that the control dress
It sets further include:
First obtains module, for when the fault level is the first predetermined level, obtaining the current output electricity of power battery
Pressure；
Second obtains module, for the current output voltage according to the power battery, carries out DC bus-bar voltage estimation, obtains
First voltage after the DC bus estimation；
First control module, for controlling vehicle according to the first voltage.
10. the control device of vehicle DC busbar voltage failure according to claim 8, which is characterized in that the control
Device is also used to when the fault level is the second predetermined level, according to the voltage max and the voltage minimum,
The second voltage of DC bus after being estimated；According to the second voltage, the vehicle is controlled.
11. the control device of vehicle DC busbar voltage failure according to claim 8, which is characterized in that the execution
Module includes:
First execution unit, for the fault level in the vehicle be the first predetermined level when, control the instrument of the vehicle
Show the first presupposed information；
Second execution unit, for the fault level in the vehicle be the second predetermined level when, control the instrument of the vehicle
It shows the second presupposed information, controls the drive system alarm lamp starting of the vehicle, controls the motor maximum output of the vehicle
Torque is decreased to the first predetermined torque value, and the motor maximum (top) speed of the control vehicle is reduced to the first preset rotation speed value；
Third execution unit, for the fault level in the vehicle be third predetermined level when, control the instrument of the vehicle
Third presupposed information is exported, the Full Vehicle System trouble light starting of the vehicle is controlled, the maximum for controlling the motor of the vehicle is defeated
Torque is decreased to the second predetermined torque value out, and the revolving speed of the control vehicle is reduced to the second preset rotation speed value, and described the
Two predetermined torque values are less than the first predetermined torque value, and the second preset rotation speed value is less than the first preset rotation speed value.
12. the control device of vehicle DC busbar voltage failure according to claim 8, which is characterized in that described first
Obtaining unit passes through formula according to the present input voltage of the high voltage component
Obtain the voltage max UmaxWith the voltage minimum Umin；Wherein, i is to be connected to integrated manipulator and direct current mother
The quantity of high voltage component between line, UiFor the present input voltage of i-th of high voltage component, KiFor i-th of high-voltage section
The voltage detection error coefficient of part.
13. the control device of vehicle DC busbar voltage failure according to claim 9, which is characterized in that described second
Module is obtained according to the current output voltage of the power battery, DC bus-bar voltage estimation is carried out, passes through formula
UDC=Ubatt-Rk*IDC
First voltage U after obtaining the DC bus estimationDC, wherein UbattFor the current output voltage of the power battery,
RkFor a constant, IDCFor the electric current of the DC bus.
14. the control device of vehicle DC busbar voltage failure according to claim 10, which is characterized in that the control
Device passes through formula according to the voltage max and the voltage minimum
The second voltage U of DC bus after being estimatedDC, wherein UmaxFor the voltage max, UminMost for the voltage
Small value.
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| CN108001232B (en) * | 2016-10-28 | 2021-04-23 | 长城汽车股份有限公司 | Vehicle fault processing method, vehicle control unit and vehicle |
| CN107499135B (en) * | 2017-06-09 | 2020-09-15 | 北汽福田汽车股份有限公司 | Vehicle fault protection method and device and vehicle |
| CN107264286B (en) * | 2017-06-27 | 2020-03-10 | 北京新能源汽车股份有限公司 | Method, device and equipment for processing running fault of electric automobile |
| CN109291808B (en) * | 2018-09-28 | 2022-02-18 | 上汽通用五菱汽车股份有限公司 | Electric vehicle speed control method, control device, electric vehicle and storage medium |
| CN112677768B (en) * | 2020-04-01 | 2022-11-01 | 长城汽车股份有限公司 | Method and system for determining connection reliability of vehicle high-voltage circuit |
| CN111896793A (en) * | 2020-08-06 | 2020-11-06 | 宝能(广州)汽车研究院有限公司 | Electric vehicle and method, device and medium for detecting abnormity of direct current bus voltage of electric vehicle |
| CN115402106B (en) * | 2022-08-30 | 2023-09-26 | 小米汽车科技有限公司 | Voltage control method and device for vehicle, vehicle and storage medium |
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| JP2933490B2 (en) * | 1994-08-30 | 1999-08-16 | 株式会社デンソー | Ground fault detection circuit for electric vehicles |
| CN101916984B (en) * | 2010-07-15 | 2015-09-23 | 芜湖莫森泰克汽车科技有限公司 | A kind of IGBT intelligent driving module for new energy automobile and control method thereof |
| CN102006007B (en) * | 2010-12-10 | 2013-01-09 | 深圳市航盛电子股份有限公司 | Motor control system of electric automobile |
| CN103192738A (en) * | 2013-04-09 | 2013-07-10 | 深圳市五洲龙汽车有限公司 | Electric automobile fault handling method and system |
| CN103342100B (en) * | 2013-07-23 | 2015-08-26 | 北京经纬恒润科技有限公司 | A kind of power on method for supervising and system of electronlmobil |
| CN105158614B (en) * | 2015-09-25 | 2018-09-14 | 广州汽车集团股份有限公司 | High-voltage safety monitoring method and high-voltage safety monitor system |
| CN105196877B (en) * | 2015-09-30 | 2017-09-08 | 上海交通大学 | Electric automobile high-voltage electric system health status diagnoses early warning circuit and method |
| CN105514941A (en) * | 2015-12-31 | 2016-04-20 | 联合汽车电子有限公司 | Electric vehicle inverter protective device and method |
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