CN103538482A - Automobile start-stop system capable of providing assisting power and recycling braking energy - Google Patents

Automobile start-stop system capable of providing assisting power and recycling braking energy Download PDF

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Publication number
CN103538482A
CN103538482A CN201310470334.0A CN201310470334A CN103538482A CN 103538482 A CN103538482 A CN 103538482A CN 201310470334 A CN201310470334 A CN 201310470334A CN 103538482 A CN103538482 A CN 103538482A
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China
Prior art keywords
motor
buck converter
super capacitor
stop system
electric machine
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CN201310470334.0A
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CN103538482B (en
Inventor
许家群
蒋杰
吴跃乐
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Beijing University of Technology
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Beijing University of Technology
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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
    • 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
    • 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
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

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Abstract

The invention discloses an automobile start-stop system capable of providing assisting power and recycling braking energy, and belongs to the field of automobile control devices. A first port of a one-way buck converter serves as an output port and is connected with a storage battery and a starter at the same time. A second port of the buck converter serves as an input port and is connected with a super-capacitor and the direct-current end of a motor controller in a BSG unit. A motor in the BSG unit is an alternating-current motor and connected with the alternating-current end of the motor controller. The motor is also an electric/dynamoelectric integrated motor connected with an engine through a belt. The motor and the motor controller form the BSG unit. The motor controller can transmit electric energy in a two-way mode. The automobile start-stop system can achieve the engine start-stop function, provide the assisting power effectively and recycle the braking energy of an automobile effectively, and system cost is reduced.

Description

A kind of can power-assisted and reclaim the automobile start stop system of braking energy
Technical field
The invention belongs to automotive controls scope, especially a kind of automobile start stop system, particularly a kind of driving engine that can be provides power-assisted also can reclaim the start stop system of automobile brake energy.
Background technology
Along with the quick increase of recoverable amount, energy consumption and the emission problem of automotive engine become increasingly conspicuous.The companies such as German Bosch have released start stop system, by strengthening actuating motor torque magnification start speed of engine, realize idling automatic shutdown function, in order to reduce oil consumption and the discharge of waiting.
But existing start stop system function is also incomplete, still there is certain deficiency, as: Fraquent start driving engine need to mate High Performance storage battery, has increased cost; Storage battery in short-term large current charge is limited in one's ability, is difficult to effectively reclaim the braking energy of vehicle; The electric system power of low-voltage storage battery power supply is little, cannot effectively provide power-assisted for driving engine.
Summary of the invention
The object of this invention is to provide a kind of recyclable braking energy, can effectively improve battery age and possess and provide the automobile start stop system of power-assisted in short-term for driving engine.
The present invention adopts following technical scheme:
Can power-assisted and reclaim the automobile start stop system of braking energy, it is characterized in that: include BSG unit, super capacitor, unidirectional buck converter, starter, start stop system controller that storage battery, motor and electric machine controller form; Wherein:
The output port of unidirectional buck converter is connected with starter with storage battery simultaneously; The input port of unidirectional buck converter is connected with the DC terminal of electric machine controller in super capacitor, BSG unit simultaneously; Motor in BSG unit is alternating current dynamo, is connected with the interchange end of electric machine controller; Motor is electronic/generating integrated motor being connected with driving engine by belt, and motor and electric machine controller form BSG unit, and electric machine controller can bi-directional electric energy; Start stop system controller is connected with electric machine controller and unidirectional buck converter respectively by bus.
Described unidirectional buck converter has the step-down ability to output port direction by its input port, the input voltage V of its input port cap=V bat+ X, wherein V batfor output port voltage, X is input port and output port voltage difference; Unidirectional buck converter also has non-decompression mode, now, and output port voltage V batwith input port voltage V capcan not influence each other, noenergy exchange between two ports.
When described system works, super capacitor voltage equals input port voltage V cap, battery tension equals output port voltage V bat, super capacitor voltage is higher than battery tension, and the two difference is input port and output port voltage difference X; Electric machine controller DC port output voltage range is 0～V bat+ X.
Start stop system controller determines the mode of operation of the two to respectively electric machine controller and unidirectional buck converter by sending controling instruction, and then realizes the flow direction of energy in start stop system and control.
The working process of system of the present invention is as follows:
During engine cold starting, storage battery is starter power supply, and unidirectional buck converter works in non-decompression mode, noenergy exchange between BSG unit and super capacitor.
When batteries to store energy deficiency charges normal, super capacitor is battery charge by unidirectional buck converter; Noenergy exchange between storage battery and starter, also noenergy exchange between starter and unidirectional buck converter.
During engine thermal starting, the electric machine controller of super capacitor in BSG unit is motor power supply, and motor is in electric operation pattern; Unidirectional buck converter works in non-decompression mode, noenergy exchange between storage battery and starter.
Overtake other vehicles and the operating mode such as climbing in short-term under, automobile needs high pulling torque to drive, now, machine operation provides power-assisted at motoring condition for driving engine.Power-assisted process with the energy flow of engine thermal starting process to identical, but in power-assisted process, the rotating speed of motor is higher, horsepower output is larger, thereby the energy that requires super capacitor to provide is more.
During automobile brake, BSG charges to super capacitor unit, and meanwhile, BSG unit charges a battery through unidirectional buck converter; Noenergy exchange between storage battery and starter, also noenergy exchange between starter and unidirectional buck converter.
When super capacitor energy-storage deficiency charges normal, the machine operation in BSG unit, in generating state, is super capacitor charging through electric machine controller, until super capacitor voltage reaches V bat+ X; Unidirectional buck converter works in non-decompression mode, noenergy exchange between storage battery and starter.
Beneficial effect of the present invention is as follows: super capacitor is born large current density Electricity Functional, storage battery except cold start process without heavy-current discharge, can prolonging service life of battery; Only when cold start, use starter and storage battery heavy-current discharge, common starter and the storage battery widely applied at present can meet operating needs, contribute to reduce system cost; Super capacitor operating voltage range strengthens, and energy storage capacity is strong, can mate large-size machine, except realizing start-stop function of engine, can also effectively reclaim the braking energy of automobile, and can provide auxiliary power for driving engine; Required unidirectional buck converter capacity is less, is beneficial to reduction system cost.
Accompanying drawing explanation
Fig. 1 is can power-assisted and reclaim the automobile start stop system constructional drawing of braking energy.
Fig. 2 is that engine cold starting process start stop system energy flow is to schematic diagram.
Fig. 3 is that super capacitor process of charging energy flow is to schematic diagram.
Fig. 4 is that battery charging process energy flow is to schematic diagram.
Fig. 5 is that engine thermal starting and power-assisted Process Energy flow to schematic diagram.
Fig. 6 is that braking procedure energy flow is to schematic diagram.
In figure: 1, storage battery; 2, BSG unit; 3, super capacitor; 4, unidirectional buck converter; 5, motor; 6, electric machine controller; 7, starter; 8, start stop system controller.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, for the present invention, be further described:
The automobile start stop system structure of can power-assisted and reclaiming braking energy, as Fig. 1, is comprised of storage battery 1, the BSG unit 2 that comprises motor 5 and electric machine controller 6, super capacitor 3, unidirectional buck converter 4, starter 7, start stop system controller 8.
The output port of unidirectional buck converter 4 is connected with starter 7 with storage battery 1 simultaneously; The input port of unidirectional buck converter 4 is connected with the DC terminal of electric machine controller 6 in super capacitor 3, BSG unit 2 simultaneously; Motor 5 in BSG unit 2 is alternating current dynamo, is connected with the interchange end of electric machine controller 6; Start stop system controller 8 is connected with electric machine controller 6 and unidirectional buck converter 4 respectively by bus.
During system normal operation, the voltage V of super capacitor 3 capvoltage V higher than storage battery 1 bat, the two difference is X, i.e. V cap=V bat+ X.Such as, for the storage battery 1 of 12V, can select the operating voltage of super capacitor 3 at 18V～30V.
Unidirectional buck converter 4 has the step-down ability to output port direction by its input port, and its input port voltage is V bat+ X, output port voltage is V bat.Unidirectional buck converter 4 also has non-decompression mode, now, and output port voltage V batwith input port voltage V capcan not influence each other, noenergy exchange between two ports.
Motor 5 is electronic/generating integrated motors (BSG) that are connected with driving engine by belt, and electric machine controller 6 can bi-directional electric energy.Electric machine controller 6 DC port output voltage ranges are 0～V bat+ X.
Start stop system controller 8 determines the mode of operation of the two to respectively electric machine controller 6 and unidirectional buck converter 4 by sending controling instruction, and then realizes the flow direction of energy in start stop system and control.
During engine cold starting, energy flow is to as Fig. 2.Storage battery 1 is starter 7 power supplies, and unidirectional buck converter 4 works in non-decompression mode, noenergy exchange between BSG unit 2 and super capacitor 3.
When super capacitor 3 energy storage deficiencies charge normal, energy flow is to as Fig. 3.Motor 5 in BSG unit 2 works in generating state, is super capacitor 3 chargings, until super capacitor 3 voltages reach V through electric machine controller 6 bat+ X; Unidirectional buck converter 4 works in non-decompression mode, noenergy exchange between storage battery 1 and starter 7.
When storage battery 1 energy storage deficiency charges normal, energy flow is to as Fig. 4.Super capacitor 3 is storage battery 1 charging by unidirectional buck converter 4, and unidirectional buck converter 4 works in step-down state; Noenergy exchange between storage battery 1 and starter 7, also noenergy exchange between starter 7 and unidirectional buck converter 4.
In engine thermal when starting,, energy flow is to as Fig. 5.The electric machine controller 6 of super capacitor 3 in BSG unit 2 is motor 5 power supplies, and motor 5 is in electric operation pattern; Unidirectional buck converter 4 works in non-decompression mode, noenergy exchange between storage battery 1 and starter 7.
During for driving engine power-assisted, energy flow is to as Fig. 5, with the energy flow of engine thermal starting process to identical.
During automobile brake, energy flow is to as Fig. 6.Motor 5 in BSG unit 2 works in generating state, and electric machine controller 6 runs on rectification state; BSG unit 2 gives super capacitor 3 chargings, and meanwhile, BSG unit 2 is through unidirectional buck converter 4 accumulators 1 chargings, and unidirectional buck converter 4 works in step-down state; Noenergy exchange between storage battery 1 and starter 7, also noenergy exchange between starter 7 and unidirectional buck converter 4.

Claims (5)

1. can power-assisted and reclaim the automobile start stop system of braking energy, it is characterized in that: include BSG unit, super capacitor, unidirectional buck converter, starter, start stop system controller that storage battery, motor and electric machine controller form; Wherein:
The output port of unidirectional buck converter is connected with starter with storage battery simultaneously; The input port of unidirectional buck converter is connected with the DC terminal of electric machine controller in super capacitor, BSG unit simultaneously; Motor in BSG unit is alternating current dynamo, is connected with the interchange end of electric machine controller; Motor is electronic/generating integrated motor being connected with driving engine by belt, and motor and electric machine controller form BSG unit, and electric machine controller can bi-directional electric energy; Start stop system controller is connected with electric machine controller and unidirectional buck converter respectively by bus.
2. according to claim 1 can power-assisted and reclaim the automobile start stop system of braking energy, it is characterized in that: described unidirectional buck converter has the step-down ability to output port direction by its input port its input port voltage V cap=V bat+ X, wherein V batfor output port voltage, X is input port and output port voltage difference; Unidirectional buck converter also has non-decompression mode, now, and output port voltage V batwith input port voltage V capcan not influence each other, noenergy exchange between two ports.
3. according to claim 1 can power-assisted and reclaim the automobile start stop system of braking energy, it is characterized in that: during described system normal operation, super capacitor voltage equals input port voltage V cap, battery tension equals output port voltage V bat, super capacitor voltage is higher than battery tension, and the two difference is input port and output port voltage difference X; Electric machine controller DC port output voltage range is 0～V bat+ X.
4. according to claim 1 can power-assisted and reclaim the automobile start stop system of braking energy, it is characterized in that: described start stop system controller is determined the mode of operation of the two to electric machine controller and unidirectional buck converter respectively by sending controling instruction, and then realize the flow direction of energy in start stop system and control; During engine cold starting, storage battery is starter power supply; When batteries to store energy is not enough, super capacitor is battery charge by unidirectional buck converter; When engine thermal starting and power-assisted, the electric machine controller of super capacitor in BSG unit is motor power supply; During automobile brake, BSG charges to super capacitor unit, and meanwhile, BSG unit charges a battery through unidirectional buck converter.
5. according to claim 1 can power-assisted and reclaim the automobile start stop system of braking energy, it is characterized in that: when described super capacitor energy-storage deficiency charges normal, motor in BSG unit is super capacitor charging through electric machine controller, until super capacitor voltage reaches V bat+ X.
CN201310470334.0A 2013-10-07 2013-10-07 A kind of can power-assisted and reclaim the automobile start-stop system of braking energy Expired - Fee Related CN103538482B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105984347A (en) * 2015-02-03 2016-10-05 上海海拉电子有限公司 Start and stop control system for cars with regenerative braking
CN106812649A (en) * 2016-12-30 2017-06-09 常州格力博有限公司 Startor of internal combustion engine and its startup method
CN107226080A (en) * 2017-05-04 2017-10-03 江苏大学 Hybrid power system in short-term and its control method based on super capacitor and starting motor of automobile
CN108270279A (en) * 2018-03-25 2018-07-10 郑州蓝之夜电子科技有限公司 Double-voltage electric power system suitable for commercial car and the automobile using the system
CN111634192A (en) * 2020-05-21 2020-09-08 一汽奔腾轿车有限公司 Vehicle dual-voltage energy recovery system and control method thereof

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JPH1182253A (en) * 1997-09-02 1999-03-26 Hino Motors Ltd Electric circuit of hybrid automobile
US20060022519A1 (en) * 2004-05-10 2006-02-02 Ji Sang W Method for controlling regenerative braking of a belt-driven hybrid vehicle
CN102166961A (en) * 2011-03-31 2011-08-31 北京汽车新能源汽车有限公司 AT (automatic transmission)-based pure electric automobile brake energy recovery control system and method thereof
JP2011234483A (en) * 2010-04-27 2011-11-17 Nec Corp Power control system, power control method, controller, program, and server device
CN102398525A (en) * 2010-09-13 2012-04-04 北汽福田汽车股份有限公司 Brake energy recovery system and method of electric vehicle
CN102658802A (en) * 2012-05-22 2012-09-12 无锡富洪科技有限公司 Automobile idle speed start-stop system and hybrid power supply
CN102935798A (en) * 2012-11-21 2013-02-20 吉林大学 Hybrid electric vehicle power system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1182253A (en) * 1997-09-02 1999-03-26 Hino Motors Ltd Electric circuit of hybrid automobile
US20060022519A1 (en) * 2004-05-10 2006-02-02 Ji Sang W Method for controlling regenerative braking of a belt-driven hybrid vehicle
JP2011234483A (en) * 2010-04-27 2011-11-17 Nec Corp Power control system, power control method, controller, program, and server device
CN102398525A (en) * 2010-09-13 2012-04-04 北汽福田汽车股份有限公司 Brake energy recovery system and method of electric vehicle
CN102166961A (en) * 2011-03-31 2011-08-31 北京汽车新能源汽车有限公司 AT (automatic transmission)-based pure electric automobile brake energy recovery control system and method thereof
CN102658802A (en) * 2012-05-22 2012-09-12 无锡富洪科技有限公司 Automobile idle speed start-stop system and hybrid power supply
CN102935798A (en) * 2012-11-21 2013-02-20 吉林大学 Hybrid electric vehicle power system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105984347A (en) * 2015-02-03 2016-10-05 上海海拉电子有限公司 Start and stop control system for cars with regenerative braking
CN106812649A (en) * 2016-12-30 2017-06-09 常州格力博有限公司 Startor of internal combustion engine and its startup method
CN107226080A (en) * 2017-05-04 2017-10-03 江苏大学 Hybrid power system in short-term and its control method based on super capacitor and starting motor of automobile
CN108270279A (en) * 2018-03-25 2018-07-10 郑州蓝之夜电子科技有限公司 Double-voltage electric power system suitable for commercial car and the automobile using the system
CN111634192A (en) * 2020-05-21 2020-09-08 一汽奔腾轿车有限公司 Vehicle dual-voltage energy recovery system and control method thereof

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