CN102653243A - Electric automobile dynamical system with precharge circuit and control strategy - Google Patents
Electric automobile dynamical system with precharge circuit and control strategy Download PDFInfo
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- CN102653243A CN102653243A CN2011100492695A CN201110049269A CN102653243A CN 102653243 A CN102653243 A CN 102653243A CN 2011100492695 A CN2011100492695 A CN 2011100492695A CN 201110049269 A CN201110049269 A CN 201110049269A CN 102653243 A CN102653243 A CN 102653243A
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- electrokinetic cell
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- super capacitor
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- electric automobile
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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
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Abstract
The invention aims at the characteristics and the existing problems of an existing electric automobile adopting an energy storage structure that a dynamical battery is connected with a super capacitor in parallel and designs an electric automobile dynamical system with a precharge circuit. With the adoption of the electric automobile dynamical system, optimized management can be carried out on vehicle electric energy. The electric automobile dynamical system comprises the dynamical battery and the super capacitor and is characterized in that the super capacitor is connected with a main motor system in parallel; the dynamical battery is connected with the main motor system in parallel after being connected with a contactor K1 in series; an auxiliary motor system is connected with the dynamical battery in parallel; the auxiliary motor system is connected with the main motor system in parallel after being connected with a charge resistor and a contactor K2; and an engine is connected to the auxiliary motor system. The invention also provides a corresponding control strategy so as to achieve the purposes of meeting the demand of the driving conditions, furthest utilizing the energy stored by the super capacitor, making the dynamical battery to avoid large current and deep discharge, improving system efficiency and ensuring the service life of the battery and the super capacitor.
Description
Technical field
The present invention relates to the electric vehicle engineering field, particularly Electric Vehicle.
Background technology
The existing the most frequently used closed-center system of elec. vehicle is to adopt electrokinetic cell and ultracapacitor, and electrokinetic cell is as main apparatus for storing electrical energy, and ultracapacitor is used for the running conditions of vehicle that instantaneous large-currents such as vehicle start or braking energy recovery discharge and recharge.
The simplest mode is that electrokinetic cell and ultracapacitor are directly parallel on the vehicle power line; Such way has weakened the super capacitor charging and discharging capabilities; And be to reach and the independent just necessary capacity that increases super capacitor of effect that uses super capacitor, this makes cost and volume all greatly increase.
A kind of improved mode is to adopt high-current relay that super capacitor and electrokinetic cell are inserted power line respectively, confirms both uses in the different vehicle operating mode through control relay.Yet frequent big electric current can cause damage to electrokinetic cell, and the electrokinetic cell cycle number is more relatively, causes its lost of life, and service efficiency is low, and super capacitor absorbs energy shortage.Also the DC/DC changer of one two quadrant can improve both energy utilization ratio between electrokinetic cell and ultracapacitor, but very high to the requirement of DC/DC changer, and expensive, can significantly increase cost to total system.In addition, the electric weight that electrokinetic cell and super capacitor under limiting case, possibly occur all is not enough to satisfy the motor demand, and how selecting corresponding control strategies also is the problem that needs consideration.
Summary of the invention
The present invention is directed to the characteristics of the electronlmobil that adopts electrokinetic cell and super capacitor parallel connection energy storing structure as stated and the problem of existence; Design a kind of system and selection corresponding control strategies that can be optimized management to the car load electric energy; Reach the demand that both can satisfy driving cycle, can utilize the energy of super capacitor storage again to greatest extent, make electrokinetic cell avoid big electric current and deep discharge; Improve system effectiveness, guarantee the battery and the purpose in super capacitor life-span.
The present invention realizes through following technical scheme:
A kind of power system of electric automobile with precharging circuit; Comprise super capacitor and electrokinetic cell; It is characterized in that: said super capacitor is parallelly connected with main electric system, and parallelly connected with main electric system after said electrokinetic cell is connected with contactless switch K1, a helper motor system is parallelly connected with said electrokinetic cell; Parallelly connected with main electric system behind helper motor system serial connection charging resistance and the contactless switch K2, driving engine is connected to the helper motor system.
Be connected through arrangement of clutch between said driving engine and the main electric system.
The present invention also comprises following technical scheme:
The control policy of the power system of electric automobile of the described band precharging circuit of a kind of claim 1 is characterized in that: quickens or at the uniform velocity under the driving cycle at vehicle start,
Super capacitor voltage is during greater than electrokinetic cell voltage, and control contactor K1, K2 break off, by super capacitor separately to main electric system power supply;
When super capacitor voltage equated with electrokinetic cell voltage, control contactor K1 was closed, the parallelly connected participation power supply with super capacitor of electrokinetic cell;
When the electrokinetic cell electric weight is lower than a certain setting value, driving engine starts work automatically, drives the generating of helper motor system, and the drive current of controlling main electric system equals generation current, is that main electric system provides electric energy by driving engine through the helper motor system separately promptly.
The control policy of the power system of electric automobile of the described band precharging circuit of a kind of claim 1 is characterized in that: under the vehicle brake damped condition,
When if contactless switch K1 is closed; At first controlling main electric system electric current is zero, breaks off contactless switch K1 then, initially brakes the big electric current major part of moment feed and is absorbed by super capacitor; Avoid contactless switch and electrokinetic cell are caused damage; Helper motor system and main electric system incision generating state, motor controller controls two cover electric systems are done constant current separately;
When super capacitor was full of soon, main electric system reduced to zero with electric current linearly;
When electrokinetic cell was full of soon, the helper motor system also reduced to zero with electric current linearly;
Vehicle withdraws from electric braking, gets into gas and stops.
A kind of control policy of power system of electric automobile of aforementioned band precharging circuit is characterized in that: under the operating mode that vehicle stops,
As the SOC of electrokinetic cell during less than a certain lower limit, driving engine replenishes electric weight through the helper motor system to electrokinetic cell;
As the SOC of electrokinetic cell during greater than a certain higher limit, engine shutdown stops to replenish electric weight to electrokinetic cell.
Beneficial effect of the present invention is:
Adopt preliminary filling resistance super capacitor to be connected with electrokinetic cell, avoided big electric current that the overcurrent that contactless switch and electrokinetic cell possibly cause is damaged, prolong the service life of electrokinetic cell better, the efficient of raising energy switching with the series connected precharging circuit of contactless switch.
When general smooth road conditions were gone, super capacitor voltage was all greater than electrokinetic cell voltage, and power supply can meet the demands super capacitor to drive motor separately, has therefore significantly reduced the number of times that discharges and recharges of electrokinetic cell, can effectively prolong its service life.
At the vehicle brake glancing impact, the electric weight that needs only electrokinetic cell is less than some setting values, and the helper motor system all can charge, and owing to adopt the structure of super capacitor and electrokinetic cell parallel connection, the time that electricity is stopped is compared the time of pure capacitor system and will grow.
When the electric weight of electrokinetic cell is not enough, drive the helper motor system through electrical generator and give main motor power supply, solved when limiting case such as vehicle continue climbing, closed-centre system can't provide the problem of enough energy.
Description of drawings
Fig. 1 is the power system of electric automobile structural representation of band precharging circuit of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done further to describe:
Referring to accompanying drawing 1,1st, super capacitor, the 2nd, electrokinetic cell, the 3rd, helper motor system, the 4th, driving engine, the 5th, main electric system, the 6th, contactless switch K2, the 7th, charging resistance, the 8th, contactless switch K2.
A kind of power system of electric automobile with precharging circuit; Comprise super capacitor 1 and electrokinetic cell 2, said super capacitor 1 is parallelly connected with main electric system 5, and connect with contactless switch K1 back and main electric system 5 of electrokinetic cell 2 is parallelly connected; Helper motor system 3 is parallelly connected with electrokinetic cell 2; Parallelly connected with main electric system 5 behind helper motor system 3 serial connection charging resistances 7 and the contactless switch K2, driving engine 4 is connected to helper motor system 3, is connected through arrangement of clutch between driving engine 4 and the main electric system 5.
The control policy under the different vehicle driving cycle of the power system of electric automobile of band precharging circuit of the present invention is following:
Quicken or at the uniform velocity under the driving cycle at vehicle start:
Super capacitor voltage is during greater than electrokinetic cell voltage, and control contactor K1, K2 break off, by super capacitor separately to main electric system power supply;
When super capacitor voltage equated with electrokinetic cell voltage, control contactor K1 was closed, the parallelly connected participation power supply with super capacitor of electrokinetic cell;
When the electrokinetic cell electric weight is lower than a certain setting value; The SOC of electrokinetic cell＜25% o'clock for example; Driving engine starts work automatically; Drive the generating of helper motor system, the drive current of controlling main electric system equals generation current, is that main electric system provides electric energy by driving engine through the helper motor system separately promptly.
Under the vehicle brake damped condition:
When if contactless switch K1 is closed, at first controlling main electric system electric current is zero, breaks off contactless switch K1 then; Helper motor system and main electric system incision generating state; The big electric current major part of initial braking moment feed is absorbed by super capacitor, avoids contactless switch and electrokinetic cell are caused damage, and motor controller controls two cover electric systems are done constant current separately; For example: helper motor 100A, main motor 350A;
When super capacitor was full of soon, main electric system reduced to zero with electric current linearly;
When electrokinetic cell was full of, the helper motor system also reduced to zero with electric current linearly;
Vehicle withdraws from electric braking, adopts gas to stop.
Under the operating mode that vehicle stops:
As the SOC of electrokinetic cell during less than a certain lower limit, the SOC of electrokinetic cell＜40% o'clock for example, driving engine replenishes electric weight through the helper motor system to electrokinetic cell;
As the SOC of electrokinetic cell during greater than a certain higher limit, the SOC of electrokinetic cell＞50% o'clock for example, engine shutdown stops to replenish electric weight to electrokinetic cell.
At the vehicle brake glancing impact, as long as the electric weight of electrokinetic cell is less than some setting values, electrokinetic cell SOC＜80% o'clock for example, the helper motor system all can charge.
The SOC value of more than mentioning all can be adjusted according to the practical oil consumption situation.
Super capacitor voltage generally only occurs when the entrucking first less than the electrokinetic cell voltage condition, when super capacitor voltage during less than electrokinetic cell voltage, gets into the electric capacity precharging state; Vehicle stops; Contactless switch K1 breaks off, and contactless switch K2 is closed, gives super capacitor precharge by electrokinetic cell; When super capacitor voltage equated with electrokinetic cell voltage, contactless switch K1 was closed.
Claims (5)
1. power system of electric automobile with precharging circuit; Comprise super capacitor and electrokinetic cell; It is characterized in that: said super capacitor is parallelly connected with main electric system, and parallelly connected with main electric system after said electrokinetic cell is connected with contactless switch K1, a helper motor system is parallelly connected with said electrokinetic cell; Parallelly connected with main electric system behind helper motor system serial connection charging resistance and the contactless switch K2, driving engine is connected to the helper motor system.
2. a kind of power system of electric automobile with precharging circuit according to claim 1 is characterized in that: be connected through arrangement of clutch between said driving engine and the main electric system.
3. the control policy of the power system of electric automobile of the described band precharging circuit of claim 1; It is characterized in that: quicken or at the uniform velocity under the driving cycle at vehicle start; Super capacitor voltage is during greater than electrokinetic cell voltage; Control contactor K1, K2 break off, and are supplied power to main electric system separately by super capacitor; When super capacitor voltage equated with electrokinetic cell voltage, control contactor K1 was closed, the parallelly connected participation power supply with super capacitor of electrokinetic cell; When the electrokinetic cell electric weight is lower than a certain setting value, driving engine starts work automatically, drives the generating of helper motor system, and the drive current of controlling main electric system equals generation current, is that main electric system provides electric energy by driving engine through the helper motor system separately promptly.
4. the control policy of the power system of electric automobile of the described band precharging circuit of claim 1; It is characterized in that: under the vehicle brake damped condition; When if contactless switch K1 is closed, at first controlling main electric system electric current is zero, breaks off contactless switch K1 then; Helper motor system and main electric system incision generating state, motor controller controls two cover electric systems are done constant current separately; When super capacitor was full of soon, main electric system reduced to zero with electric current linearly; When electrokinetic cell was full of soon, the helper motor system also reduced to zero with electric current linearly; Vehicle withdraws from electric braking, gets into gas and stops.
5. the control policy of the power system of electric automobile of the described band precharging circuit of claim 1; It is characterized in that: under the operating mode that vehicle stops; As the SOC of electrokinetic cell during less than a certain lower limit, driving engine replenishes electric weight through the helper motor system to electrokinetic cell; As the SOC of electrokinetic cell during greater than a certain higher limit, engine shutdown stops to replenish electric weight to electrokinetic cell.
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| CN2011100492695A CN102653243A (en) | 2011-03-01 | 2011-03-01 | Electric automobile dynamical system with precharge circuit and control strategy |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910061A (en) * | 2012-10-18 | 2013-02-06 | 浙江德润中环电动汽车科技有限公司 | Supercapacitor energy-storage ISG (Integrated Started Generator) asynchronous motor type hybrid power system and generating control method |
| CN102923013A (en) * | 2012-11-01 | 2013-02-13 | 重庆长安汽车股份有限公司 | Discharge control method and system for new energy automobile |
| CN103010045A (en) * | 2012-12-26 | 2013-04-03 | 天津市松正电动汽车技术股份有限公司 | Dual-power new energy automobile driving device and control method thereof |
| CN104670207A (en) * | 2013-12-02 | 2015-06-03 | 周向进 | Method for controlling race start of vehicle by brake pedal and accelerator pedal |
| CN105291868A (en) * | 2014-07-02 | 2016-02-03 | 比亚迪股份有限公司 | Vehicle power system and vehicle comprising same |
| CN106042967A (en) * | 2016-04-18 | 2016-10-26 | 洛阳尹太科智能科技有限公司 | Electrical system of electric vehicle and power supply method |
| CN106080243A (en) * | 2016-04-18 | 2016-11-09 | 洛阳尹太科智能科技有限公司 | Electric car electrical system and method for supplying power to |
| CN107054103A (en) * | 2016-12-15 | 2017-08-18 | 山东贝格新能源科技有限公司 | A kind of new automobile-used composite power source control strategy |
| CN107284253A (en) * | 2016-04-05 | 2017-10-24 | 光阳工业股份有限公司 | Vehicle serial mixed power device and its control method |
| CN107585058A (en) * | 2017-09-29 | 2018-01-16 | 北京新能源汽车股份有限公司 | A kind of charging device and electric automobile |
| CN110654371A (en) * | 2018-06-29 | 2020-01-07 | 比亚迪股份有限公司 | Control method and device of vehicle power system and vehicle |
| CN111048854A (en) * | 2019-12-16 | 2020-04-21 | 安徽绿沃循环能源科技有限公司 | Large-current starting circuit and energy storage system of power battery |
| CN111169294A (en) * | 2018-11-09 | 2020-05-19 | 黄永升 | Method and device for controlling electrical connection between vehicle battery and super capacitor |
| CN113178934A (en) * | 2021-06-03 | 2021-07-27 | 吉林大学 | Integrated low-voltage energy storage power supply system for vehicle and control method thereof |
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2011
- 2011-03-01 CN CN2011100492695A patent/CN102653243A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910061A (en) * | 2012-10-18 | 2013-02-06 | 浙江德润中环电动汽车科技有限公司 | Supercapacitor energy-storage ISG (Integrated Started Generator) asynchronous motor type hybrid power system and generating control method |
| CN102923013A (en) * | 2012-11-01 | 2013-02-13 | 重庆长安汽车股份有限公司 | Discharge control method and system for new energy automobile |
| CN102923013B (en) * | 2012-11-01 | 2015-07-15 | 重庆长安汽车股份有限公司 | Discharge control method and system for new energy automobile |
| CN103010045A (en) * | 2012-12-26 | 2013-04-03 | 天津市松正电动汽车技术股份有限公司 | Dual-power new energy automobile driving device and control method thereof |
| CN104670207B (en) * | 2013-12-02 | 2019-01-08 | 周氏（北京）汽车技术有限公司 | Utilize the method for brake pedal and gas pedal control automobile ejection starting |
| CN104670207A (en) * | 2013-12-02 | 2015-06-03 | 周向进 | Method for controlling race start of vehicle by brake pedal and accelerator pedal |
| CN105291868A (en) * | 2014-07-02 | 2016-02-03 | 比亚迪股份有限公司 | Vehicle power system and vehicle comprising same |
| CN107284253A (en) * | 2016-04-05 | 2017-10-24 | 光阳工业股份有限公司 | Vehicle serial mixed power device and its control method |
| CN107284253B (en) * | 2016-04-05 | 2021-10-01 | 光阳工业股份有限公司 | Vehicle series type hybrid power device and control method thereof |
| CN106042967A (en) * | 2016-04-18 | 2016-10-26 | 洛阳尹太科智能科技有限公司 | Electrical system of electric vehicle and power supply method |
| CN106080243A (en) * | 2016-04-18 | 2016-11-09 | 洛阳尹太科智能科技有限公司 | Electric car electrical system and method for supplying power to |
| CN107054103A (en) * | 2016-12-15 | 2017-08-18 | 山东贝格新能源科技有限公司 | A kind of new automobile-used composite power source control strategy |
| CN107585058A (en) * | 2017-09-29 | 2018-01-16 | 北京新能源汽车股份有限公司 | A kind of charging device and electric automobile |
| CN110654371A (en) * | 2018-06-29 | 2020-01-07 | 比亚迪股份有限公司 | Control method and device of vehicle power system and vehicle |
| CN111169294A (en) * | 2018-11-09 | 2020-05-19 | 黄永升 | Method and device for controlling electrical connection between vehicle battery and super capacitor |
| CN111169294B (en) * | 2018-11-09 | 2022-09-23 | 黄永升 | Method and device for controlling electrical connection between vehicle battery and super capacitor |
| CN111048854A (en) * | 2019-12-16 | 2020-04-21 | 安徽绿沃循环能源科技有限公司 | Large-current starting circuit and energy storage system of power battery |
| CN113178934A (en) * | 2021-06-03 | 2021-07-27 | 吉林大学 | Integrated low-voltage energy storage power supply system for vehicle and control method thereof |
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Application publication date: 20120905 |