CN106240390A - A kind of method of dynamic optimization electric energy when power system for pure electric bus and low SOC thereof - Google Patents
A kind of method of dynamic optimization electric energy when power system for pure electric bus and low SOC thereof Download PDFInfo
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- CN106240390A CN106240390A CN201610647968.2A CN201610647968A CN106240390A CN 106240390 A CN106240390 A CN 106240390A CN 201610647968 A CN201610647968 A CN 201610647968A CN 106240390 A CN106240390 A CN 106240390A
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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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
A kind of method of dynamic optimization electric energy when power system for pure electric bus and low SOC thereof.A kind of method of dynamic optimization electric energy when the present invention proposes pure electric vehicle power system and low SOC thereof, it comprises the following steps: step one, monitor the state-of-charge SOC of electrokinetic cell in real time；Step 2, by monitoring described SOC compare with respective threshold；Step 3, according to comparative result use corresponding electric energy optimizing strategy.Take the energy optimal control mode that the present invention proposes, on the one hand by optimizing the operation saving electric energy use of motor, subsidiary engine, on the other hand adjust energy regenerating mode by real-time according to battery status.Reclaim electric current by adjustment ceiling capacity in real time, improve energy recovery efficiency, not only can more pass through to reclaim the increase energy content of battery but also the use of electric compressor can be reduced by increasing electric braking.
Description
Technical field
The present invention relates to new energy field, particularly relate to when a kind of power system for pure electric bus and low SOC thereof the most excellent
The method changing electric energy.
Background technology
In recent years under national policy promotes, pure electric automobile City bus market occupancy volume gets more and more.Pure electric automobile
Power source is from electrokinetic cell, when electrokinetic cell energy is less than setting value, needs power battery charging could maintain normal fortune
OK.In prior art, when electrokinetic cell energy is less than setting value, car load directly descends high pressure not continue to run with or to drop motor defeated
Going out power relies on driver operation to maintain operation.
In prior art, directly lower high pressure makes the car load source of running out of steam not walk, and can only be dragged to charging pile and fill by trailer
Electricity, bothersome arduously.
Prior art reduces when electrokinetic cell electricity is less than setting value battery output and namely reduces output, need
Want driver to maintain the throttle of to input, make car load travel with the speed of, easily make tired driver.
Summary of the invention
Set forth herein a kind of method so that it is use electric energy to maintain when electrokinetic cell electric energy is low by optimization and run to charging
Stake.
It is an object of the invention to be achieved through the following technical solutions.
The method of dynamic optimization electric energy when the present invention proposes the low SOC of a kind of pure electric vehicle dynamical system, it include with
Lower step:
The state-of-charge SOC of step one, in real time monitoring electrokinetic cell；
Step 2, by monitoring described SOC compare with respective threshold；
Step 3, according to comparative result use corresponding electric energy optimizing strategy.
Wherein, described threshold value includes first threshold and Second Threshold, and described first threshold is more than described Second Threshold.
Wherein, the comparative result of described step 2 is: described SOC is less than first threshold, during more than or equal to Second Threshold,
Perform the first electric energy optimizing strategy.
Wherein, the comparative result of described step 2 is: described SOC is less than first threshold, then perform the second electric energy optimizing plan
Slightly.
Wherein, described first electric energy optimizing strategy includes:
(a1) improve the triggering temperature of electric air-conditioning, just trigger enabling closed high distribution box when temperature is higher than certain value
The relay of electric air-conditioning；
(a2) by the power frequency of reduction electric power steering pump to the first power frequency, thus the defeated of electric power steering pump is reduced
Go out power, saved by reduction power steering and turn to power consumption；
(a3) stop when gas tank air pressure reaches the first atmospheric pressure value inflating when electric compressor, when SOC is low by reducing
This value reduces the work of air compressor machine, meets vehicle security simultaneously；
(a4) energization organic efficiency is carried out according to the maximum chargeable electric current of battery of battery management system feedback in real time.
Wherein, described second electric energy optimizing strategy is:
(b1) automatically controlling car load persistently keeps throttle in less opening with a speed C traveling without driver
Degree, wherein speed C belongs to a certain vehicle speed range, and it is the speed of vehicle neutral gear automatic running；
(b2) entire car controller according to different voltages, at a temperature of electric system efficiency curve choose electric machine operation state and make
It is operated in maximal efficiency region；
(b3) in auxiliary system, entire car controller is automatically switched off electric air-conditioning；
(b4) in auxiliary system, electric power steering pump is responsible for providing power steering, under low SOC state, car load control
Device processed sends frequency reducing work order to electric booster steering controller, is down to the second power frequency；
(b5) in auxiliary system, entire car controller reduces the triggering atmospheric pressure value that electric compressor is out of service；
(b6) the real-time chargeable maximum current of battery that entire car controller feeds back according to battery management system, adjusts whole in real time
Car energy regenerating maximum current, increases energy recovery efficiency to greatest extent.
The invention allows for a kind of pure electric vehicle dynamical system, including entire car controller, electric machine controller, battery management
System, electric compressor controller, electric booster steering controller and high pressure distribution module, it is characterised in that:
Entire car controller controls with electric machine controller, battery management system, electric compressor controller, electric power steering
Device and high pressure distribution module carry out command interaction；
Electric machine controller distributes module with motor and high pressure respectively and is connected；
Instantaneous operating conditions is fed back to electric machine controller by motor；
Motor, main subtract, drive axle and wheel are sequentially connected；
Wherein, battery management system is connected with electrokinetic cell, and electrokinetic cell distributes module by high-voltage line with high pressure subsequently
It is connected.
Wherein, high pressure distribution module respectively with electric booster steering controller, electric air-conditioning and electric compressor controller
It is connected, thus electric power steering, electric air-conditioning and electric compressor are carried out on off control.
The present invention based on how to control when electrokinetic cell SOC is too low whole vehicle state with reach reasonable distribution energy should
With, have the advantage that
Entire car controller, according to live signal, makes motor be operated in relative efficiency in the case of less than certain speed
District, improves utilization rate of electrical；
Entire car controller receives after SOC crosses low signal, can automatically control car load and travel with certain speed, it is not necessary to drive
Member steps on the gas control always, but still can respond the input of driver's large throttle, brake signal；
By conservative control auxiliary system duty, save energy further and use；
Reclaim electric current by adjusting ceiling capacity in real time, improve energy recovery efficiency, both can more be increased by recovery
Add the energy content of battery and can reduce again the use of electric compressor by increasing electric braking.
Accompanying drawing explanation
By reading the detailed description of hereafter preferred implementation, various other advantage and benefit common for this area
Technical staff will be clear from understanding.Accompanying drawing is only used for illustrating the purpose of preferred implementation, and is not considered as the present invention
Restriction.And in whole accompanying drawing, it is denoted by the same reference numerals identical parts.In the accompanying drawings:
Accompanying drawing 1 shows the pure electric automobile power assembly sketch according to embodiment of the present invention；
The control method that when accompanying drawing 2 shows the low SOC according to embodiment of the present invention, dynamic optimization electric energy uses.
Detailed description of the invention
It is more fully described the illustrative embodiments of the disclosure below with reference to accompanying drawings.Although accompanying drawing shows these public affairs
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure and the reality that should not illustrated here
The mode of executing is limited.On the contrary, it is provided that these embodiments are able to be best understood from the disclosure, and can be by these public affairs
What the scope opened was complete conveys to those skilled in the art.
As Fig. 1 is the pure electric automobile power assembly composition sketch consistent with the embodiment of the present invention, mainly by full-vehicle control
Device, electric machine controller, motor etc. form, and electrokinetic cell is as the energy source of car load.
In figure, dotted line connects is high-tension line, is connected by high-voltage line, by electrokinetic cell by high pressure distribution module respectively
It is connected to electric machine controller, electric power steering, electric air-conditioning, electric compressor etc..
Line with arrow represents has information communication, four-headed arrow to represent two way communication, unidirectional arrow table between two parts
Show that the parts that arrow points to only accept the information that other end parts transmit.
Solid line is connected and is connected by frame for movement between expression parts.
High pressure distribution module has and controls the relay that electric air-conditioning enables, have full-vehicle control to send.
Electric booster steering controller, electric compressor controller are by full-vehicle control.
Power assembly system structure of the present invention is as follows:
Entire car controller controls with electric machine controller, battery management system, electric compressor controller, electric power steering
Device and high pressure distribution module carry out command interaction.
Electric machine controller distributes module with motor and high pressure respectively and is connected.
Instantaneous operating conditions is fed back to electric machine controller by motor.
Motor, main subtract, drive axle and wheel are sequentially connected.
Battery management system is connected with electrokinetic cell, and electrokinetic cell is connected with high pressure distribution module by high-voltage line subsequently.
High pressure distribution module is connected with electric booster steering controller, electric air-conditioning and electric compressor controller respectively,
Thus electric power steering, electric air-conditioning and electric compressor are carried out Control of Voltage.
In the present invention, SOC (state of charge) is the numerical value for weighing electrokinetic cell dump energy, and scope is 0-
100%, 100% shows the full electricity of battery.
Energy regenerating refers to when touching on the brake, and motor can export braking torque to carry out generating electricity and be power battery charging, this
One process converting kinetic energy into electric energy is referred to as energy regenerating.
A kind of energy optimal control method proposed for the pure electric vehicle of structure shown in Fig. 1 as shown in Figure 2.
A kind of method of dynamic optimization electric energy when the present invention proposes low SOC, it comprises the following steps:
The state-of-charge SOC of step one, in real time monitoring electrokinetic cell；
Step 2, by monitoring described SOC compare with respective threshold；
Step 3, according to comparative result use corresponding electric energy optimizing strategy.
Wherein, described threshold value includes first threshold and Second Threshold, and described first threshold is more than described Second Threshold.
Wherein, the comparative result of described step 2 is: described SOC is less than first threshold, during more than or equal to Second Threshold,
Perform the first electric energy optimizing strategy.
Wherein, the comparative result of described step 2 is: described SOC is less than first threshold, then perform the second electric energy optimizing plan
Slightly.
Wherein, described first electric energy optimizing strategy includes:
(a1) improve the triggering temperature of electric air-conditioning, just trigger enabling closed high distribution box when temperature is higher than certain value
The relay of electric air-conditioning；
(a2) power frequency by reducing electric power steering pump reduces the output of electric power steering pump, by subtracting
Little power steering is saved and is turned to power consumption；
(a3) stop when gas tank air pressure reaches certain value inflating, when SOC is low by reducing this value when electric compressor
Reduce the work of air compressor machine, meet vehicle security simultaneously；
(a4) energization organic efficiency is carried out according to the maximum chargeable electric current of battery of battery management system feedback in real time.
Wherein, described second electric energy optimizing strategy is:
(b1) automatically controlling car load persistently keeps throttle in less opening with a speed C traveling without driver
Degree, wherein speed C belongs to a certain vehicle speed range, and it is the speed of vehicle neutral gear automatic running；
(b2) entire car controller according to different voltages, at a temperature of electric system efficiency curve choose electric machine operation state and make
It is operated in maximal efficiency region；
(b3) in auxiliary system, entire car controller is automatically switched off electric air-conditioning；
(b4) in auxiliary system, electric power steering pump is responsible for providing power steering, under low SOC state, car load control
Device processed sends frequency reducing work order to electric booster steering controller；
(b5) in auxiliary system, entire car controller reduces the triggering atmospheric pressure value that electric compressor is out of service；
(b6) the real-time chargeable maximum current of battery that entire car controller feeds back according to battery management system, adjusts whole in real time
Car energy regenerating maximum current, increases energy recovery efficiency to greatest extent.
In a certain embodiment, battery management system sends electricity SOC message, entire car controller to entire car controller in real time
First determine whether which the SOC received is in interval, if SOC ∈ [A, B) interval time control strategy as follows, wherein A is at electricity
SOC value in the case of all energy consumption equipments use lowest power to be operated in electrical automobile, wherein B refers in electric automobile all
Energy consumption equipment use peak power be operated in the case of SOC value:
(a1) improve the triggering temperature of electric air-conditioning, just trigger enabling closed high distribution box when temperature is higher than certain value
The relay of electric air-conditioning.
Improve the triggering temperature of electric air-conditioning, will before triggering temperature improve, or according to circumstances, Non-follow control electricity
Dynamic air-conditioning triggers.
(a2) the first power frequency by reducing electric power steering pump reduces the output of electric power steering pump, logical
Cross reduction power steering to save and turn to power consumption；
After reducing power frequency, output also can reduce, and this also can saves energy consumption.
(a3) stop when gas tank air pressure reaches the first atmospheric pressure value inflating when electric compressor, when SOC is low by reducing
This value reduces the work of air compressor machine, meets vehicle security simultaneously.
When air compressor machine quit work within a period of time or needed the rated pressure of work to reduce, i.e. reach to reduce sky
The compressor operation time, thus realize electric energy saving.
(a4) energization organic efficiency is carried out according to the maximum chargeable electric current of battery of battery management system feedback in real time.
Equally, to greatest extent electric energy is reclaimed, more kinetic energy can be converted too, allow the electric automobile can
Adhere to that the probability of charging pile becomes big.
As SOC ＜ A, car load energy-optimised use control method is as follows:
(b1) automatically controlling car load persistently keeps throttle in less opening with a speed C traveling without driver
Degree, wherein speed C belongs to a certain vehicle speed range, and it is the speed of vehicle neutral gear automatic running, when receiving driver's input
Respond during large throttle signal；Also can respond when receiving service brake signal；After driver unclamps throttle and service brake, can return
Carriage return speed C continues to travel.
Here speed C is a scope, and it is for making vehicle when driver does not step on the gas and do not brakes, it is possible to steady
The speed of fixed traveling.
(b2) information such as the input voltage of entire car controller real-time reception motor, temperature, according to different voltages, at a temperature of electricity
Machine system effectiveness curve chooses electric machine operation state makes it be operated in maximal efficiency region, improves energy content of battery utilization ratio, with
Time speed less than certain value.
When the efficiency maximum of electric system, i.e. consuming minimum, export maximum simultaneously, this situation also can guarantee that electronic vapour
Car can travel farther.
(b3) in auxiliary system, entire car controller is automatically switched off electric air-conditioning.
When electric air-conditioning is closed, really many electric energy can be saved for electric automobile.
(b4) in auxiliary system, electric power steering pump is responsible for providing power steering, under low SOC state, car load control
Device processed sends frequency reducing work order to electric booster steering controller, is reduced to the second power frequency, in order to lower electric power steering
The work efficiency of pump, saves electricity.
Wherein said first power frequency is more than the second power frequency.
(b5) in auxiliary system, entire car controller reduces the triggering atmospheric pressure value that electric compressor is out of service, it is to avoid storage
Gas tank air pressure is too high and uses minimizing surplus；
Wherein the first atmospheric pressure value is more than triggering atmospheric pressure value.
(b6) the real-time chargeable maximum current of battery that entire car controller feeds back according to battery management system, adjusts whole in real time
Car energy regenerating maximum current, increases energy recovery efficiency to greatest extent, on the one hand can increase battery electric quantity；On the other hand
The i.e. electric braking ability of energy regenerating dynamics increase strengthens and reduces the use stopping gas, can reduce the use of electric compressor.
In the above embodiment of the present invention, proposing SOC is carried out subregion, car load has different response for different intervals.
In another embodiment, subregion can be decided whether as required.
In different embodiments, each vehicle speed value, partition value are according to different vehicles, motor types, electrokinetic cell type
Difference and different.
In different embodiments, can be according to the parts of concrete coupling when applying in the pure electric automobile of different automobile types
Performance decides whether certain action used in above-mentioned control method.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope that the invention discloses, the change that can readily occur in or replacement,
All should contain within protection scope of the present invention.Therefore, protection scope of the present invention answers the described protection model with claim
Enclose and be as the criterion.
Claims (9)
1. a method for dynamic optimization electric energy during pure electric vehicle low SOC, it comprises the following steps:
The state-of-charge SOC of step one, in real time monitoring electrokinetic cell；
Step 2, by monitoring described SOC compare with respective threshold；
Step 3, according to comparative result use corresponding electric energy optimizing strategy.
The method of dynamic optimization electric energy during low SOC the most as claimed in claim 1, described threshold value includes first threshold and the second threshold
Value, and described first threshold is more than described Second Threshold.
The method of dynamic optimization electric energy during low SOC the most as claimed in claim 2, the comparative result of wherein said step 2 is: institute
State SOC and be less than first threshold, during more than or equal to Second Threshold, perform the first electric energy optimizing strategy.
The method of dynamic optimization electric energy during low SOC the most as claimed in claim 2, the comparative result of wherein said step 2 is: institute
State SOC and be less than first threshold, then perform the second electric energy optimizing strategy.
The method of dynamic optimization electric energy during low SOC the most as claimed in claim 3, wherein said first electric energy optimizing strategy includes:
(a1) improve the triggering temperature of electric air-conditioning, just trigger the electricity enabling closed high distribution box when temperature is higher than certain value
The relay of dynamic air-conditioning；
(a2) by the power frequency of reduction electric power steering pump to the first power frequency, thus the output work of electric power steering pump is reduced
Rate；
(a3) stop when gas tank air pressure reaches the first atmospheric pressure value inflating, when SOC is low by reducing this value when electric compressor
Reduce the work of air compressor machine；
(a4) energization organic efficiency is carried out according to the maximum chargeable electric current of battery of battery management system feedback in real time.
The method of dynamic optimization electric energy during low SOC the most as claimed in claim 4, wherein said second electric energy optimizing strategy is:
(b1) automatically control car load travel with speed C persistently keep without driver throttle in a less aperture, its
Middle speed C belongs to a certain vehicle speed range, and it is for making vehicle when driver does not step on the gas and do not brakes, it is possible to stable row
The speed sailed；
(b2) entire car controller according to different voltages, at a temperature of electric system efficiency curve choose electric machine operation state and make its work
Make in maximal efficiency region；
(b3) in auxiliary system, entire car controller is automatically switched off electric air-conditioning；
(b4) in auxiliary system, electric power steering pump is responsible for providing power steering, under low SOC state, entire car controller
Frequency reducing work order is sent to the second power frequency to electric booster steering controller；
(b5) in auxiliary system, entire car controller reduces the triggering atmospheric pressure value that electric compressor is out of service.
7. perform one of them the pure electric vehicle dynamical system of method of claim 1-6, including entire car controller, motor
Controller, battery management system, electric compressor controller, electric booster steering controller and high pressure distribution module, its feature
It is:
Entire car controller and electric machine controller, battery management system, electric compressor controller, electric booster steering controller and
High pressure distribution module carries out command interaction；
Electric machine controller distributes module with motor and high pressure respectively and is connected；
Instantaneous operating conditions is fed back to electric machine controller by motor；
Motor, main subtract, drive axle and wheel are sequentially connected.
8. pure electric vehicle dynamical system as claimed in claim 7, it is characterised in that:
Battery management system is connected with electrokinetic cell, and electrokinetic cell is connected with high pressure distribution module by high-voltage line subsequently.
9. pure electric vehicle dynamical system as claimed in claim 7, it is characterised in that:
High pressure distribution module is connected with electric booster steering controller, electric air-conditioning and electric compressor controller respectively, thus
Electric power steering, electric air-conditioning and electric compressor are carried out on off control.
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| CN107554316A (en) * | 2017-04-06 | 2018-01-09 | 东风特汽（十堰）专用车有限公司 | The energy conserving system and method for a kind of electric car |
| CN108001297A (en) * | 2017-12-12 | 2018-05-08 | 湘潭电机股份有限公司 | A kind of automobile drive electric motor control method of three branched structures |
| CN108197392A (en) * | 2018-01-05 | 2018-06-22 | 聊城大学 | The assist characteristic curve design method of automobile electric booster steering system based on SOC |
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