CN107662501A - Electric control method and pure electric automobile under pure electric automobile - Google Patents
Electric control method and pure electric automobile under pure electric automobile Download PDFInfo
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- CN107662501A CN107662501A CN201610605426.9A CN201610605426A CN107662501A CN 107662501 A CN107662501 A CN 107662501A CN 201610605426 A CN201610605426 A CN 201610605426A CN 107662501 A CN107662501 A CN 107662501A
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- electricity
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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
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention provides electric control method and pure electric automobile under a kind of pure electric automobile, method includes：When having lower electricity request, vehicle control unit controls battery management system carries out insulation failure detection；And sent to electric machine controller and release the enabled instruction of motor, the instruction that is stopped is sent to DC-DC converter, when receiving the off working state information of DC-DC converter feedback or not receiving the off working state information of DC-DC converter feedback in the first preset time, electricity instruction under high pressure is sent to battery management system, after the feedback of electric machine controller and battery management system is received, controlled motor controller is quickly lower electric, electric under high pressure to complete；After electricity under completing high pressure, control vehicle carries out electricity under low pressure.The present invention is to the signal interaction between each controller in electric process under pure electric automobile and receives the action that should be performed after command signal and makes clear stipulaties, so as to improve the reliability and security of electric process under pure electric automobile.
Description
Technical field
The present invention relates to field of new energy technologies, electric control method and pure electronic vapour under more particularly to a kind of pure electric automobile
Car.
Background technology
Energy crisis and environmental pollution make it that orthodox car faces the challenge of getting worse, new-energy automobile turn into currently with
And the trend of future development, and pure electric automobile occupies critical role in new-energy automobile.But because pure electric automobile is sent out
The exhibition time is short, and technology is not mature enough, the design experiences deficiency of accumulation, and the lower electric process and lower electric condition to pure electric automobile consider
It is not comprehensive enough, causing vehicle often to occur, lower electricity is unsuccessful, can not descend low tension completely and cause low tension battery power shortage, gives
Driver causes great puzzlement.
Electric logic is excessively simple under current pure electric automobile, does not have perfect definition to lower electric current journey, does not examine fully
Consider signal interaction between each controller being related in lower electric process, the switching of the state of each controller itself and during institute
Take time, the time required to the order of control target response controller, if vehicle condition is with ideal situation, slightly different, just occurs
The lower unsuccessful problem of electricity, even results in full-vehicle control logic and falls into chaos, and causes not expected consequence.It is i.e. current pure electronic
The safety and reliability of electric process is relatively low under automobile, influences the driving experience and traffic safety of driver.
The content of the invention
In view of this, the present invention is directed to propose electric control method, this method can be to pure electronic under a kind of pure electric automobile
Signal interaction under automobile in electric process between each controller and receive the action that should be performed after command signal and make clearly
Regulation, so as to improve the reliability and security of electric process under pure electric automobile.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
Electric control method under a kind of pure electric automobile, the pure electric automobile include entire car controller, electric machine controller and
Battery management system, it the described method comprises the following steps：Judge whether vehicle has lower electricity request；If vehicle has lower electricity request,
Then battery management system described in vehicle control unit controls carries out insulation failure detection；Insulation event is completed in the battery management system
After barrier detection, the vehicle control unit controls vehicle enters electricity under horizontal high voltage, specifically includes：The entire car controller is to the electricity
Machine controller, which is sent, releases the enabled instruction of motor, and sends the instruction that is stopped to DC-DC converter, and receiving
State the off working state information of DC-DC converter feedback or do not receive the DC-DC in the first preset time
During the off working state information of converter feedback, send electricity under high pressure to the battery management system and instruct, the battery management
System according to the master of electricity instruction control electrokinetic cell under the high pressure just, main negative contactor disconnect, and to the entire car controller
Feed back contactor and disconnect information, the entire car controller releases information in the enabled state for receiving the electric machine controller feedback
After disconnecting information with the contactor of battery management system feedback, repid discharge instruction is sent to the electric machine controller, with
Make the electric machine controller quickly lower electricity, it is electric under high pressure to complete；After electricity under completing high pressure, the vehicle control unit controls
Vehicle carries out electricity under low pressure.
Further, the vehicle control unit controls vehicle carries out electricity under low pressure, further comprises：Judge electric under low pressure
Before, the upper electric type of vehicle；If the upper electric type is electricity in low pressure, the entire car controller is to the battery management system
System sends electricity instruction under low pressure, and is sent to the electric machine controller and release the enabled instruction of motor；The battery management system exists
Receive electricity under the low pressure and instruct lower electricity after the 3rd preset time, the electric machine controller is according to the enabled finger of releasing motor
Order exits motor and enables pattern, and releases information to entire car controller feedback enabled state；The entire car controller is receiving
After the enabled state releases information, control vehicle carries out electricity under low pressure.
Further, in addition to：If the upper electric type is electricity in high pressure, the entire car controller is receiving
The contactor for stating battery management system feedback is disconnected under information and battery management system high pressure after the completion of electricity, the entire car controller
Electricity instruction under low pressure is sent to the battery management system；Battery management system electricity instruction in the case where receiving the low pressure
Afterwards, judge whether electric moter voltage is less than predeterminated voltage；If it is, under the battery management system is after the 4th preset time
Electricity, otherwise, the battery management system lower electricity after the 5th preset time.
Further, battery management system described in the vehicle control unit controls carries out insulation failure detection, further bag
Include：Judge whether the electric machine controller enables pattern in motor and whether motor speed is less than preset rotation speed；If it is,
Battery management system described in vehicle control unit controls performs insulation failure detection operation, and is receiving the battery management system
The Insulation monitoring of feedback completes information or Insulation monitoring time-out information or operates the second preset time performing insulation failure detection
Afterwards, the battery management system is controlled to stop performing insulation failure detection operation.
Further, in addition to：The entire car controller judges after the 6th preset time of the lower electricity request is received
Whether motor speed is less than the preset rotation speed；If the motor speed is less than the preset rotation speed, the full-vehicle control
Device judges whether that the quick lower electricity for receiving the electric machine controller feedback completes information；If it is not, then the entire car controller
Control main relay to disconnect, force to carry out electricity under low pressure.
Relative to prior art, electric control method has the advantage that under pure electric automobile of the present invention：
Electric control method under the pure electric automobile of the present invention, pure electric automobile entirely descend electric process be divided under high pressure electricity with
Electric two parts under low pressure, and clear and definite design has been done to two-part lower electric process respectively, to each controller in lower electric process it
Between signal interaction and receive the action that should be performed after command signal and make clear stipulaties, while consider each controller and
The interference of the ardware feature and error signal of its control object, during add delay judgement, so as to improve pure electronic vapour
The reliability and security of electric process under car.
It is another object of the present invention to propose a kind of pure electric automobile, the pure electric automobile can be in lower electric process
Signal interaction between each controller and receive the action that should be performed after command signal and make clear stipulaties, so as to improve down
The reliability and security of electric process.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of pure electric automobile, including：Judge module, entire car controller, electric machine controller and battery management system, its
In, the judge module is used to judge whether vehicle has lower electricity request；The entire car controller is used for having lower electricity request in vehicle
When, control the battery management system to carry out insulation failure detection, and insulation failure detection is completed in the battery management system
Afterwards, control vehicle enters electric under horizontal high voltage, specifically includes：Sent to the electric machine controller and release the enabled instruction of motor, and to
DC-DC converter sends the instruction that is stopped, and in the off working state for receiving the DC-DC converter feedback
Information or when not receiving the off working state information of DC-DC converter feedback in the first preset time, to institute
State battery management system and send electricity instruction under high pressure, the battery management system is used for dynamic according to electricity instruction control under the high pressure
The master of power battery is just, main negative contactor disconnects, and disconnect information, the full-vehicle control to entire car controller feedback contactor
Device releases the contactor of information and battery management system feedback in the enabled state for receiving the electric machine controller feedback
After disconnecting information, repid discharge instruction is sent to the electric machine controller, so that the electric machine controller is quickly lower electric, to complete
It is electric under high pressure, and after electricity under completing high pressure, control vehicle carries out electricity under low pressure.
Further, the entire car controller is used to judge under low pressure before electricity, the upper electric type of vehicle, and electric described
When type is electric in low pressure, sends electricity under low pressure to the battery management system and instruct, and send and solve to the electric machine controller
Except the enabled instruction of motor, the battery management system lower electricity, institute after the 3rd preset time of electricity instruction under receiving the low pressure
State electric machine controller and the enabled pattern of motor is exited according to the enabled instruction of releasing motor, and enabled shape is fed back to entire car controller
State releases information, and for the entire car controller after receiving the enabled state and releasing information, control vehicle carries out electricity under low pressure.
Further, the controller is additionally operable to when electric type described is electric in high pressure, and is receiving the electricity
The contactor of pond management system feedback is disconnected under information and battery management system high pressure after the completion of electricity, to the battery management system
Electricity instruction under low pressure is sent, whether the battery management system judges electric moter voltage after electricity instruction under receiving the low pressure
Less than predeterminated voltage, and when whether the electric moter voltage is less than predeterminated voltage, the battery management system is when the 4th is default
Between after lower electricity, otherwise, the battery management system lower electricity after the 5th preset time.
Further, whether the entire car controller is used to judge the electric machine controller in the enabled pattern of motor and electricity
Whether machine rotating speed is less than preset rotation speed, and is in the electric machine controller that motor enables pattern and motor speed is less than default turn
When fast, the battery management system is controlled to perform insulation failure detection operation, and receiving the battery management system feedback
Insulation monitoring complete information or Insulation monitoring time-out information or after performing insulation failure detection and operating the second preset time, control
The battery management system is made to stop performing insulation failure detection operation.
Further, the entire car controller is additionally operable to after the 6th preset time of the lower electricity request is received, and is judged
Whether motor speed is less than the preset rotation speed, and when the motor speed is less than the preset rotation speed, judges whether to receive
Quick lower electricity to electric machine controller feedback completes information, and do not receive the electric machine controller feedback it is quick under
When electricity completes information, control main relay disconnects, and forces to carry out electricity under low pressure.
Described pure electric automobile is with electric control method under above-mentioned pure electric automobile relative to possessed by prior art
Dominant Facies are same, will not be repeated here.
Brief description of the drawings
The accompanying drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 be the embodiment of the present invention pure electric automobile under electric control method flow chart；
Fig. 2 be one embodiment of the invention pure electric automobile high pressure under electric process overall flow figure；And
Fig. 3 is the structured flowchart of the pure electric automobile of the embodiment of the present invention.
Description of reference numerals：
100- pure electric automobiles, 110- judge modules, 120- entire car controllers, 130- electric machine controllers, 140 battery managements
System.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Fig. 1 is the flow chart of electric control method under pure electric automobile according to an embodiment of the invention.Fig. 2 is according to this
The flow chart of electric process under the pure electric automobile high pressure of invention one embodiment.
Pure electric automobile in the embodiment of the present invention is for example including entire car controller (VCU, vehicle Control
Unit), electric machine controller (MCU, Motor Control Unit) and battery management system (BMS, Battery Management
System).Wherein, entire car controller is the core of whole-control system, is the hub section being managed to vehicle safe operation
Point.Entire car controller receives the data and driver's operational order of sensor transmission, is sent after being handled according to control strategy
Control instruction is monitored in real time to control units such as electric machine controller, battery management systems, and to travel condition of vehicle.In electricity
Braking energy feedback control is carried out in electrical automobile braking procedure, improves the continual mileage of pure electric automobile.Battery management system is
For managing battery so as to maintain more preferable state, steady operation, powered for each electricity consumption device.Battery management system is to electricity
The voltage in pond, electric current, temperature etc. carry out moment detection, while also carry out detection of electrical leakage, heat management, battery balanced management, alarm
Remind etc., residual capacity, discharge power, report SOC＆SOH states are calculated, passes through CAN interface and entire car controller, motor
Controller etc. carries out real-time communication.Wherein, SOC (State of Charge) represents battery charge state, SOH (Section Of
Health accumulator capacity, health degree, performance state) are represented.Electric machine controller should be able to respond the moment of torsion that entire car controller is sent
Instruction, controlled motor drive vehicle under electric model, and when sliding or braking, carry out energy regenerating.Wherein, full-vehicle control
Communicated between device, electric machine controller and battery management system by CAN.
As shown in figure 1, and combine Fig. 2, electric control method comprises the following steps under the pure electric automobile of the embodiment of the present invention：
Step S1：Judge whether vehicle has lower electricity request.For example, when key is switched into OFF by ON positions, vehicle
There is lower electricity request.
Step S2：If vehicle has lower electricity request, vehicle control unit controls battery management system carries out insulation fault inspection
Survey.
Specifically, vehicle control unit controls battery management system carries out insulation failure detection, further comprises：Judge motor
Controller whether enables pattern in motor and whether motor speed is less than preset rotation speed；If it is, vehicle control unit controls
Battery management system performs insulation failure detection operation, and completes information in the Insulation monitoring for receiving battery management system feedback
Insulation monitoring time-out information or perform insulation failure detection operate the second preset time after, control battery management system stop
Perform insulation failure detection operation.Wherein, the second preset time can be set according to the actual requirements, and preset rotation speed is, for example, 10rmp.
In other words, i.e., under it is electric when, after VCU receives key OFF signal, MCU pattern and motor speed are judged, if MCU patterns
Pattern is enabled for motor, and motor speed is less than 10rpm (preset rotation speed), then VCU controls BMS to perform insulation failure detection, and
The Insulation monitoring that BMS feedbacks are received as VCU completes the mark of detection time-out or from after sending insulation failure detection request
After second preset time (this time performs the time correlation of insulation failure detection with BMS), BMS can be made to exit insulation failure detection
State.
Step S3：After battery management system completes insulation failure detection, vehicle control unit controls vehicle enters horizontal high voltage
Lower electricity, is specifically included：
Step S31：Entire car controller is sent to electric machine controller releases the enabled instruction of motor, and to DC/DC conversion
Device sends the instruction that is stopped, and is receiving the off working state information of DC-DC converter feedback or default first
When not receiving the off working state information of DC-DC converter feedback in the time, sent to battery management system under high pressure
Electricity instruction.Wherein, the first preset time can be set according to the actual requirements, for example, 2 seconds.
Step S32：Battery management system according to the master of electricity instruction control electrokinetic cell under high pressure just, main negative contactor breaks
Open, and information is disconnected to entire car controller feedback contactor.
Step S33：Entire car controller releases information and battery management in the enabled state for receiving electric machine controller feedback
After the contactor of system feedback disconnects information, repid discharge instruction is sent to electric machine controller, so that under electric machine controller is quick
Electricity, it is electric under high pressure to complete.
In other words, i.e., after battery management system completes insulation failure detection, VCU sends to motor control and releases motor
Enabled instruction, and send the instruction that is stopped to DC/DC converters.Enter off working state when receiving DC/DC converter feedbacks
The instruction that is stopped either is sent from VCU to DC/DC converters to count after 2 seconds (the first preset time) still without receiving DC/DC
When converter feedback enters off working state, VCU sends electricity under high pressure to BMS and instructed, and order BMS disconnects high tension battery master
Just, main negative contactor.When electric machine controller has released enabled (the enabled contact letter of motor of motor to vehicle mouth controller feedback
Breath), BMS feedbacks are main just, after main negative contactor already off (contactor disconnection information), VCU can send quickly lower electricity to MCU and refer to
Order, after the quick lower electricity of MCU feedbacks is completed, vehicle completes electricity under high pressure, and subsequent vehicle enters the electric stage under low pressure.
Wherein, DC-DC converter (DC/DC converters) at work, can be (specified by the high pressure of electrokinetic cell
336V/DC) direct current is converted into low-voltage direct electric energy, and power supply is provided for secondary network, meets wanting for vehicle low-voltage electrical appliance part
Ask, be if necessary lead acid battery charge, so as to realize the dynamic equilibrium of vehicle low pressure charge and discharge.
If it should be noted that under high pressure in electric process, vehicle request performs upper high pressure action, then VCU is not to this
Action is responded, and is continued electric under high pressure.
Step S4：After electricity under completing high pressure, vehicle control unit controls vehicle carries out electricity under low pressure.
Wherein, in step s 4, electricity further comprises under vehicle control unit controls vehicle progress low pressure：Judge electric under low pressure
Before, the upper electric type of vehicle；If upper electric type is electricity in low pressure, entire car controller is sent under low pressure to battery management system
Electricity instruction, and sent to electric machine controller and release the enabled instruction of motor；Battery management system electricity instruction the in the case where receiving low pressure
Lower electricity after three preset times, electric machine controller enable pattern according to releasing motor and enable instruction and exit motor, and to full-vehicle control
Device feedback enabled state releases information；For entire car controller after receiving enabled state and releasing information, control vehicle carries out low pressure
Lower electricity.Wherein, the 3rd preset time is, for example, 50 milliseconds.In other words, i.e., if vehicle is directly entered by low pressure power up phase
The electric stage under low pressure, then VCU directly sends electricity instruction under low pressure to BMS, and is sent to MCU and release the enabled instruction of motor.BMS is received
It is electric under 50 milliseconds of delay (the 3rd preset time) after electricity instruction under to VCU low pressure.MCU is after releasing motor and enabling by corresponding shape
State feeds back to VCU, and then VCU sends the signal for closing CAN transmitting-receivings to MCU, and VCU and MCU closes CAN transmissions jointly afterwards, enters
Enter silent status, then carry out electricity under low pressure.
Further, if upper electric type is electricity in high pressure, entire car controller is receiving battery management system feedback
Contactor disconnect under information and battery management system high pressure after the completion of electricity, entire car controller sends low pressure to battery management system
Lower electricity instruction；Battery management system judges whether electric moter voltage is less than predeterminated voltage after electricity instruction under receiving low pressure；If
It is, then battery management system lower electricity after the 4th preset time, otherwise, battery management system lower electricity after the 5th preset time.
Wherein, the 4th preset time is, for example, 50 milliseconds, and the 5th preset time is, for example, 2 seconds, and predeterminated voltage is, for example, 80V.In other words,
If vehicle is the electric stage under the low pressure entered by high pressure power up phase after the electric stage under high pressure, when receive BMS feedback
After electrokinetic cell master is just, the signal (contactor disconnection information) that has all disconnected of main negative contactor and BMS feedback states are lower high pressure,
VCU can send electricity under low pressure to BMS and instruct, and BMS judges whether electric moter voltage drops to 80V (in advance after receiving lower low pressure instruction
If voltage) below, the electricity under 50 milliseconds of delay (the 4th preset times) if dropping to after 80V, if do not drop to 80V with
Under, then it is electric under BMS delays 2 seconds (the 5th preset time).
Further, this method also includes：Entire car controller judges electricity after the 6th preset time of lower electricity request is received
Whether machine rotating speed is less than preset rotation speed；If motor speed is less than preset rotation speed, entire car controller judges whether to receive electricity
The quick lower electricity of machine controller feedback completes information；If it is not, then vehicle control unit controls main relay disconnects, force progress low
Pressure electricity.Wherein, the 6th preset time can be set according to the actual requirements.In other words, i.e., it is complete to VCU feedback repid discharges in MCU
Into after information, VCU sends the signal for closing CAN transmitting-receivings to MCU, and VCU and MCU closes CAN transmissions jointly afterwards, into silence
State, it is then lower electric.If after key Off (lower electricity request) passes through the 6th preset time (can demarcate), and motor speed
During less than preset rotation speed (such as 10rpm, now thinking that vehicle is static), if VCU does not receive the anti-of MCU electric discharge completions also
Feedback, then VCU controls main relay disconnection, forces lower low tension to enter dormancy.
To sum up, under pure electric automobile of the invention electric control method by electric process under pure electric automobile be divided under high pressure electricity and
Electric two parts under low pressure, and the controller state to being related in every part is redirected and is made that and is distinctly claimed, and state switching is also done
Gone out delay, avoided after there is exception in lower electric process, the control logic of vehicle falls into chaos, cause it is not expected after
Fruit.This method is to the signal interaction and shape in lower electric process between entire car controller, electric machine controller and motor management systems
State redirects, Hardware Response Delay time etc. is all made that and explicitly defined, and can ensure that lower electric process is clear, accurately holds by this design
OK.
In addition, this method hardware and software platform application is strong, VCU, MCU, BMS are most important 3 controls in pure electric automobile system
Device processed, for different vehicles, the lower electric current journey of other controllers can be added on the basis of this method, main body frame is not required to more
Change.
On the other hand, the delay time in the lower electric process mentioned in this method can all be demarcated, can be according to different controls
Device processed and controlled device characteristic are demarcated, and after changing in the event of hardware, are not required to modify program, only need to be according to new
Ardware feature demarcated, you can realize lower Electricity Functional, convenient transplanting.
Electric control method under pure electric automobile according to embodiments of the present invention, entirely electric process is descended to be divided into pure electric automobile
Electricity and electric two parts under low pressure under high pressure, and clear and definite design has been done to two-part lower electric process respectively, in lower electric process
Signal interaction between each controller and receive the action that should be performed after command signal and make clear stipulaties, while consider each
The interference of the ardware feature and error signal of controller and its control object, during add delay judgement, so as to improve
The reliability and security of electric process under pure electric automobile.
Further, as shown in figure 3, embodiment of the invention discloses that a kind of pure electric automobile 100, including：Judge mould
Block 110, entire car controller 120, electric machine controller 130 and battery management system 140.
Judge module 110 is used to judge whether vehicle has lower electricity request.For example, when key is switched to OFF positions by ON positions
When putting, judge that vehicle has lower electricity request.
Entire car controller 120 is used for when vehicle has lower electricity request, and control battery management system 140 carries out insulation fault inspection
Survey, and after battery management system 140 completes insulation failure detection, control vehicle enters electricity under horizontal high voltage, specifically includes：To electricity
Machine controller 130, which is sent, releases the enabled instruction of motor, and sends the instruction that is stopped to DC-DC converter, and is receiving
DC/DC conversion is not received to the off working state information of DC-DC converter feedback or in the first preset time
During the off working state information of device feedback, send electricity under high pressure to battery management system 140 and instruct, battery management system 140 is used
According to the master of electricity instruction control electrokinetic cell under high pressure just, main negative contactor disconnects, and feeds back and contact to entire car controller 120
Device disconnects information, and entire car controller 120 releases information and battery management in the enabled state for receiving the feedback of electric machine controller 130
After the contactor that system 140 is fed back disconnects information, repid discharge instruction is sent to electric machine controller 130, so that electric machine controller
130 quick lower electricity, it is electric under high pressure to complete, and after electricity under completing high pressure, control vehicle carries out electricity under low pressure.Wherein,
One preset time can be set according to the actual requirements, for example, 2 seconds.In other words, i.e., insulation fault is completed in battery management system 140
After detection, VCU is sent to motor control releases the enabled instruction of motor, and sends the instruction that is stopped to DC/DC converters.When
DC/DC converter feedbacks are received into off working state or the instruction meter 2 that is stopped is sent from VCU to DC/DC converters
Still without when receiving DC/DC converter feedbacks and entering off working state after second (the first preset time), VCU is to BMS transmission high pressures
Lower electricity instruction, order BMS disconnect high tension battery master just, main negative contactor.When electric machine controller 130 is anti-to vehicle mouth controller
Feedback has released that motor enabled (the enabled contact information of motor), BMS feedbacks are main just, already off (contactor breaks main negative contactor
Open information) after, VCU can send quick lower electricity instruction to MCU, and after the quick lower electricity of MCU feedbacks is completed, vehicle is completed under high pressure
Electricity, subsequent vehicle enter the electric stage under low pressure.
Wherein, DC-DC converter (DC/DC converters) at work, can be (specified by the high pressure of electrokinetic cell
336V/DC) direct current is converted into low-voltage direct electric energy, and power supply is provided for secondary network, meets wanting for vehicle low-voltage electrical appliance part
Ask, be if necessary lead acid battery charge, so as to realize the dynamic equilibrium of vehicle low pressure charge and discharge.
If it should be noted that under high pressure in electric process, vehicle request performs upper high pressure action, then VCU is not to this
Action is responded, and is continued electric under high pressure.
Further, entire car controller 120 controls vehicle to carry out electricity under low pressure and further comprised：Entire car controller 120 is sentenced
Under disconnected low pressure before electricity, the upper electric type of vehicle, and when upper electric type is electric in low pressure, sent to battery management system 140 low
Pressure electricity instruction, and sent to electric machine controller 130 and release the enabled instruction of motor, battery management system 140 is receiving low pressure
Lower electricity instructs lower electricity after the 3rd preset time, and electric machine controller 130 enables instruction according to releasing motor and exits the enabled pattern of motor,
And feed back enabled state to entire car controller 120 and release information, entire car controller 120 is receiving enabled state releasing information
Afterwards, vehicle is controlled to carry out electricity under low pressure.Wherein, the 3rd preset time is, for example, 50 milliseconds.In other words, i.e., if vehicle is by low
Pressure power up phase is directly entered the electric stage under low pressure, then VCU directly sends electricity instruction under low pressure to BMS, and sends releasing to MCU
The enabled instruction of motor.BMS receives under VCU low pressure after electricity instruction electricity under 50 milliseconds of delay (the 3rd preset times).MCU is being released
Corresponding state is fed back into VCU, and then the signal that VCU receives and dispatches to MCU transmission closings CAN after motor is enabled, afterwards VCU and MCU
The common CAN that closes is sent, and into silent status, then carries out electricity under low pressure.
Further, controller is additionally operable to when upper electric type is electric in high pressure, and is receiving battery management system 140
The contactor of feedback is disconnected under information and the high pressure of battery management system 140 after the completion of electricity, and low pressure is sent to battery management system 140
Lower electricity instruction, battery management system 140 judge whether electric moter voltage is less than predeterminated voltage after electricity instruction under receiving low pressure,
And when whether electric moter voltage is less than predeterminated voltage, the lower electricity after the 4th preset time of battery management system 140, otherwise, battery
The lower electricity after the 5th preset time of management system 140.Wherein, the 4th preset time is, for example, 50 milliseconds, the 5th preset time example
It it is such as 2 seconds, predeterminated voltage is, for example, 80V.In other words, if vehicle is laggard by the electric stage under high pressure by high pressure power up phase
The electric stage under the low pressure entered, when receive the electrokinetic cell masters of BMS feedbacks just, the signal (contactor that has all disconnected of main negative contactor
Disconnect information) and after BMS feedback states are lower high pressure, VCU can send electricity under low pressure to BMS and instruct, and BMS receive lower low pressure and refer to
Judge whether electric moter voltage drops to 80V (predeterminated voltage) below after order, be delayed 50 millisecond the (the 4th if dropping to after 80V
Preset time) under electricity, if not dropping to below 80V, BMS is delayed electricity under 2 seconds (the 5th preset time).
Further, entire car controller 120 controls battery management system 140 to carry out insulation failure detection, further comprises：
Entire car controller 120 judges whether electric machine controller 130 enables pattern in motor and whether motor speed is less than preset rotation speed,
And when electric machine controller 130 is in the enabled pattern of motor and motor speed is less than preset rotation speed, control battery management system 140
Insulation failure detection operation is performed, and information or insulation inspection are completed in the Insulation monitoring for receiving the feedback of battery management system 140
Survey time-out information or after performing insulation failure detection and operating the second preset time, control battery management system 140 stops performing
Insulation failure detection operates.Wherein, the second preset time can be set according to the actual requirements, and preset rotation speed is, for example, 10rmp.Change speech
It, i.e., under it is electric when, after VCU receives key OFF signal, judge MCU pattern and motor speed, if MCU patterns for electricity
Machine enables pattern, and motor speed is less than 10rpm (preset rotation speed), then VCU controls BMS to perform insulation failure detection, and works as VCU
Receive BMS feedbacks Insulation monitoring complete the mark of detection time-out or after insulation failure detection request is sent it is second pre-
If after the time (this time performs the time correlation of insulation failure detection with BMS), BMS can be made to exit insulation failure detection state.
Further, entire car controller 120 is additionally operable to after the 6th preset time of lower electricity request is received, and judges that motor turns
Whether speed is less than preset rotation speed, and when motor speed is less than preset rotation speed, judges whether that receiving electric machine controller 130 feeds back
Quick lower electricity complete information, and when the quick lower electricity for not receiving the feedback of electric machine controller 130 completes information, control it is main after
Electrical equipment disconnects, and forces to carry out electricity under low pressure.Wherein, the 6th preset time can be set according to the actual requirements.In other words, i.e., in MCU
After completing information to VCU feedback repid discharges, VCU sends the signal for closing CAN transmitting-receivings to MCU, and VCU and MCU are common afterwards
CAN is closed to send, it is then lower electric into silent status.If (can by the 6th preset time in key Off (lower electricity request)
Demarcation) after, and when motor speed is less than preset rotation speed (such as 10rpm, now thinking that vehicle is static), if VCU does not have also
The feedback that MCU electric discharges are completed is received, then VCU controls main relay to disconnect, and forces lower low tension to enter dormancy.
To sum up, pure electric automobile according to embodiments of the present invention, whole lower electric process is divided under high pressure under electricity and low pressure
Electric two parts, and clear and definite design has been done to two-part lower electric process respectively, to the letter between each controller in lower electric process
Number interaction and receive the action that should be performed after command signal and make clear stipulaties, while consider each controller and its control
The interference of the ardware feature and error signal of object, during add delay judgement, it is electric so as to improve under pure electric automobile
The reliability and security of process.
It should be noted that the pure electric automobile of the embodiment of the present invention specific implementation and the embodiment of the present invention it is pure
The specific implementation of electric control method is similar under electric automobile, specifically refers to the description of method part, in order to reduce redundancy,
Do not repeat herein.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (10)
1. electric control method under a kind of pure electric automobile, it is characterised in that the pure electric automobile includes entire car controller, motor
Controller and battery management system, the described method comprises the following steps：
Judge whether vehicle has lower electricity request；
If vehicle has lower electricity request, battery management system described in vehicle control unit controls carries out insulation failure detection；
After the battery management system completes insulation failure detection, the vehicle control unit controls vehicle enters under horizontal high voltage
Electricity, specifically include：
The entire car controller is sent to the electric machine controller releases the enabled instruction of motor, and is sent out to DC-DC converter
The instruction that is stopped is sent, and is receiving the off working state information of the DC-DC converter feedback or default first
When not receiving the off working state information of the DC-DC converter feedback in the time, sent out to the battery management system
Electricity instruction under high pressure is sent,
The battery management system according to the master of electricity instruction control electrokinetic cell under the high pressure just, main negative contactor disconnect, and
Information is disconnected to entire car controller feedback contactor,
The entire car controller releases information and the battery management in the enabled state for receiving the electric machine controller feedback
After the contactor of system feedback disconnects information, repid discharge instruction is sent to the electric machine controller, so that the motor control
Device is quickly lower electric, electric under high pressure to complete；
After electricity under completing high pressure, the vehicle control unit controls vehicle carries out electricity under low pressure.
2. electric control method under pure electric automobile according to claim 1, it is characterised in that the vehicle control unit controls
Vehicle carries out electricity under low pressure, further comprises：
Judge under low pressure before electricity, the upper electric type of vehicle；
If the upper electric type is electricity in low pressure, the entire car controller sends electricity under low pressure to the battery management system
Instruction, and sent to the electric machine controller and release the enabled instruction of motor；
The battery management system lower electricity, electric machine controller after the 3rd preset time of electricity instruction under receiving the low pressure
Instruction is enabled according to the releasing motor and exits the enabled pattern of motor, and information is released to entire car controller feedback enabled state；
For the entire car controller after receiving the enabled state and releasing information, control vehicle carries out electricity under low pressure.
3. electric control method under pure electric automobile according to claim 2, it is characterised in that also include：
If the upper electric type is electricity in high pressure, the entire car controller is receiving the battery management system feedback
Contactor is disconnected under information and battery management system high pressure after the completion of electricity, and the entire car controller is sent out to the battery management system
Send electricity instruction under low pressure；
The battery management system judges whether electric moter voltage is less than predeterminated voltage after electricity instruction under receiving the low pressure；
If it is, the battery management system lower electricity after the 4th preset time, otherwise, the battery management system is the 5th
Lower electricity after preset time.
4. electric control method under pure electric automobile according to claim 1, it is characterised in that the vehicle control unit controls
The battery management system carries out insulation failure detection, further comprises：
Judge whether the electric machine controller enables pattern in motor and whether motor speed is less than preset rotation speed；
If it is, battery management system described in vehicle control unit controls performs insulation failure detection operation, and receiving
The Insulation monitoring for stating battery management system feedback completes information or Insulation monitoring time-out information or is performing insulation failure detection behaviour
After making the second preset time, the battery management system is controlled to stop performing insulation failure detection operation.
5. electric control method under pure electric automobile according to claim 4, it is characterised in that also include：
It is described to judge whether motor speed is less than after the 6th preset time of the lower electricity request is received for the entire car controller
Preset rotation speed；
If the motor speed is less than the preset rotation speed, the entire car controller judges whether to receive the motor control
The quick lower electricity of device feedback processed completes information；
If it is not, then the vehicle control unit controls main relay disconnects, force to carry out electricity under low pressure.
A kind of 6. pure electric automobile, it is characterised in that including：Judge module, entire car controller, electric machine controller and battery management
System, wherein,
The judge module is used to judge whether vehicle has lower electricity request；
The entire car controller is used to, when vehicle has lower electricity request, control the battery management system to carry out insulation fault inspection
Survey, and after the battery management system completes insulation failure detection, control vehicle enters electricity under horizontal high voltage, specifically includes：To
The electric machine controller, which is sent, releases the enabled instruction of motor, and sends the instruction that is stopped to DC-DC converter, and is connecing
Receive the off working state information of the DC-DC converter feedback or do not received in the first preset time described straight
During the off working state information of stream/direct current transducer feedback, send electricity under high pressure to the battery management system and instruct, the electricity
Pond management system be used for according to the master of electricity instruction control electrokinetic cell under the high pressure just, main negative contactor disconnect, and to described
Entire car controller feedback contactor disconnects information, and the entire car controller is receiving the enabled shape of the electric machine controller feedback
After state releases the contactor disconnection information of information and battery management system feedback, send to the electric machine controller and quickly put
Electricity instruction, so that the electric machine controller is quickly lower electric, it is electric under high pressure to complete, and after electricity under completing high pressure, control is whole
Car carries out electricity under low pressure.
7. pure electric automobile according to claim 6, it is characterised in that the entire car controller is used to judge electric under low pressure
Before, the upper electric type of vehicle, and when electric type described is electric in low pressure, electricity under low pressure is sent to the battery management system
Instruction, and sent to the electric machine controller and release the enabled instruction of motor, the battery management system is receiving the low pressure
Lower electricity after the 3rd preset time of lower electric instruction, the electric machine controller exit motor according to the enabled instruction of releasing motor and enabled
Pattern, and information is released to entire car controller feedback enabled state, the entire car controller is receiving the enabled state solution
After information, control vehicle carries out electricity under low pressure.
8. pure electric automobile according to claim 7, it is characterised in that the controller is additionally operable to the electric type described
For it is electric in high pressure when, and disconnect information and battery management system high pressure in the contactor for receiving battery management system feedback
It is lower electricity after the completion of, to the battery management system send low pressure under electricity instruct, the battery management system receive it is described low
After pressure electricity instruction, judge whether electric moter voltage is less than predeterminated voltage, and when whether the electric moter voltage is less than predeterminated voltage,
The battery management system lower electricity after the 4th preset time, otherwise, under the battery management system is after the 5th preset time
Electricity.
9. pure electric automobile according to claim 6, it is characterised in that the entire car controller is used to judge the motor
Controller whether enables pattern in motor and whether motor speed is less than preset rotation speed, and is in electricity in the electric machine controller
When machine enables pattern and motor speed and is less than preset rotation speed, control the battery management system to perform insulation failure detection and operate,
And complete information or Insulation monitoring time-out information or exhausted performing in the Insulation monitoring for receiving the battery management system feedback
After the preset time of edge failure detection operations second, the battery management system is controlled to stop performing insulation failure detection operation.
10. pure electric automobile according to claim 9, it is characterised in that the entire car controller is additionally operable to receiving
After the 6th preset time of the lower electricity request, judge whether motor speed is less than the preset rotation speed, and in the motor speed
During less than the preset rotation speed, judge whether that the quick lower electricity for receiving the electric machine controller feedback completes information, and not
When receiving the quick lower electricity completion information of the electric machine controller feedback, control main relay disconnects, and forces to carry out under low pressure
Electricity.
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| CN113085595A (en) * | 2021-05-11 | 2021-07-09 | 浙江三一装备有限公司 | Electric vehicle charging, power-on and power-off control method and device and electric vehicle |
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| CN113580942A (en) * | 2021-08-20 | 2021-11-02 | 河南牧原智能科技有限公司 | Device and method for controlling whole electric vehicle, electric vehicle and related products |
| CN114167191A (en) * | 2021-12-16 | 2022-03-11 | 深圳市道通科技股份有限公司 | Automobile power converter detection method and system and computer equipment |
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