CN201970877U - Regenerative braking system of electric vehicle - Google Patents
Regenerative braking system of electric vehicle Download PDFInfo
- Publication number
- CN201970877U CN201970877U CN2010206136144U CN201020613614U CN201970877U CN 201970877 U CN201970877 U CN 201970877U CN 2010206136144 U CN2010206136144 U CN 2010206136144U CN 201020613614 U CN201020613614 U CN 201020613614U CN 201970877 U CN201970877 U CN 201970877U
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- inverter
- super capacitor
- conv
- relay
- electric vehicle
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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
- Y02T10/72—Electric energy management in electromobility
Abstract
A regenerative braking system of an electric vehicle comprises a control system, a brake pedal, an accelerator pedal, a storage battery, a relay, a super capacitor, a DC-DC converter, an inverter and a motor, wherein the DC-DC converter is connected with the super capacitor; the relay is connected with the storage battery; the relay and the DC-DC converter are connected to the inverter in parallel; and the inverter is connected with the motor. By adopting the structure, the regenerative braking system of the electric vehicle has the advantages that the requirements of the withstand voltage and capacitance of the super capacitor are reduced, the volume and weight of the super capacitor are greatly reduced; and meanwhile, the high current charge and discharge characteristics of the super capacitor are realized, and the driving range of the electric vehicle is extended.
Description
Technical field
The utility model relates to car brakeing and Motor Control Field, especially relates to regenerative braking system of electric vehicle.
Background technology
Energy shock and ecological deterioration have become the key factor of restriction global evolution, and the automobile of research energy-saving and environmental protection is one of effective means of alleviating energy pressure, reduction environmental pollution.Pure electric vehicle adopts driven by power, can reach to reduce discharging, the purpose that cuts down the consumption of energy.Yet the energy content of battery of pure electric vehicle is limited, therefore the continual mileage of pure electric vehicle is subjected to bigger restriction, and the regenerative brake function reclaims the energy in the braking procedure, in the driving process, the energy that reclaims is discharged, reaching the purpose of the degree of utilization that improves limited vehicular energy, thereby realize prolonging the pure electric vehicle continual mileage.
Usually, regenerative brake is that the kinetic energy with vehicle is converted to electrical power storage at energy-storing container, energy-storing container can be storage battery or super capacitor, and super capacitor is as the energy-storing container of regenerative brake, with the direct many shortcomings that exists in parallel of storage battery: 1, the super capacitor that needs higher withstand voltage directly in parallel, because in parallel with storage battery, the initial voltage of super capacitor is exactly the terminal voltage of storage battery, has just improved the withstand voltage of super capacitor virtually; 2, in parallel with storage battery, require the super capacitor value big, if the super capacitor value is too small, just is unable to cope with heavy-current discharge and absorbs the big electric current of braking.
Summary of the invention
At above existing problems, when the utility model proposes a kind of battery-driven car braking situation the kinetic energy of vehicle is converted into electric energy and stores, then the regeneration brake system of the battery-driven car that travels of powered vehicle.
The technical solution of the utility model is: comprise control system, brake pedal, acceleration pedal, storage battery, relay, super capacitor, DC-DC conv, inverter and motor; Its DC-DC conv is connected with super capacitor, and relay is connected with battery, this relay and DC-DC conv access in parallel inverter; This inverter is connected with motor; This control system is connected with inverter with acceleration pedal, brake pedal, relay, DC-DC conv respectively.
As further improvement of the utility model, its control system comprises main control unit, driving circuit and detection and change-over circuit; Described main control unit is connected with inverter with DC-DC conv relay respectively by driving circuit, is connected with inverter with the DC-DC conv respectively with change-over circuit by detecting.
Technique effect of the present utility model is: structurally adopt super capacitor through the indirect mode in parallel of DC-DC conv and storage battery, can reduce the withstand voltage and the capacitance requirement of super capacitor, volume, the weight of super capacitor have been reduced greatly, also bring into play simultaneously super capacitor large current density electrical characteristics, prolong the enforcement mileage of battery-driven car.
Description of drawings
Fig. 1 regeneration brake system schematic diagram
Fig. 2 regeneration brake system constructional drawing
Fig. 3 regeneration brake system control flow chart
Wherein: 1. brake equipment, 2. storage battery, 3. super capacitor 3,4. relay 4,5.DC-DC conv, 6.ABS system, 7. brake pedal, 8. inverter, 9. motor, 10. speed-changing mechanism, 11. acceleration pedal, 12. control system, 21. detect and change-over circuit, 22. driving circuit, 23. main control units.
The specific embodiment
As shown in Figure 1, regenerative braking system of electric vehicle comprises control system 12, brake pedal 7, acceleration pedal 11, storage battery 2, relay 4, super capacitor 3, DC-DC conv 5, inverter 8 and motor 9; Control system 12 comprises main control unit 23, driving circuit 22 and detection and change-over circuit 21; This DC-DC conv 5 is connected with super capacitor 3, and relay 4 is connected with battery 2, this relay 4 and DC-DC conv 5 access inverters 8 in parallel, and this inverter 8 is connected with motor 9; Main control unit 23 is connected with inverter 8 with DC-DC conv 5 relays 4 respectively by driving circuit 22, is connected with inverter 8 with DC-DC conv 5 respectively with change-over circuit 21 by detecting, and main control unit 23 also connects acceleration pedal 11 and brake pedal 7.
Main control unit 23 is gathered speed-slackening signal and Acceleration Signal, and handles, and determines the mode of operation (starting state and braking mode) of battery-driven car.Under starting state, storage battery 2 provides electric energy for motor 9 through inverter 8, if this moment super capacitor 3 electric energy abundances, through DC-DC conv 5, super capacitor 3 boosted to storage battery 2 voltages equate, and with storage battery 2 common drive motor 9.Under braking mode, this moment, motor 9 was in generating state, automobile kinetic energy is converted into electric energy, be rectified into direct current (DC) (this moment, inverter 8 was equivalent to rectifying circuit) through inverter 8, regulate through DC-DC conv 5 again, give super capacitor 3 chargings, this moment, super capacitor 3 was equivalent to the energy-storing container that regenerating braking energy reclaims.
Detect the relevant state variables of gathering inverter 8 and DC-DC conv 5 with change-over circuit 21, feed back to main control unit 23, simultaneously, main control unit 23 is gathered speed-slackening signal and Acceleration Signal, in view of the above, main control unit 23 calculates the optimum Working of motor 9 and super capacitor 3, again after the state variable with reference to inverter 8 and DC-DC conv 5, calculate the on-off signal of one group of inverter 8 and DC-DC conv 5, through driving circuit 22 conductings or turn-off corresponding switch, thereby reached the purpose of control motor 9 and super capacitor 3 work.In brief, driving circuit 22, detection and change-over circuit 21, main control unit 23, inverter 8 and DC-DC conv 5 constitute a closed loop control.
The regeneration brake system flow process is shown in Figure 3: the signal that at first detects brake pedal 7, judge whether brake pedal 7 is stepped on, if brake pedal 7 is stepped on and is then adopted regenerative brake mode 31, if brake pedal is not stepped on and is judged further then whether acceleration pedal 11 is stepped on, if acceleration pedal 11 is stepped on and is then detected the DC side electric current, whether compare the DC side electric current then greater than given value, if the DC side electric current is less than given value, adopt battery independent drive mode 32, otherwise, adopt super capacitor and the common drive pattern 33 of battery.
The principle of work of regenerative brake mode 31 is: at first, main control unit 23 disconnects relay, cuts off the major loop of storage battery 2 and inverter 8, stops the power supply of 2 pairs of motors 9 of storage battery on the one hand, prevents the rush of current storage battery 2 of regenerative brake on the other hand; Then, main control unit 23 control inverters 8 make inverter 8 no longer the electric energy of DC side is converted to a-c electric drive motor 9, but the AC rectification that motor 9 regenerative brakes are produced becomes direct current (DC) to output to DC side; Main control unit 23 control DC-DC convs 5 make DC-DC conv 5 that the electric energy of DC side is adjusted to suitable form and are stored in the super capacitor 3.
The principle of work of battery independent drive mode 32 is: main control unit 23 control relays 4 closures, the storage battery 2 and the major loop of inverter 8 are connected, and make storage battery 2 give motor 9 power supplies; DC-DC conv 5 is not worked at this moment, and super capacitor 3 neither charges and also externally do not power, by storage battery 2 independent drive motors 9.
The principle of work of the common drive pattern 33 of super capacitor and battery is: main control unit 23 control relays 4 closures, the storage battery 2 and the major loop of inverter 8 are connected, and make storage battery 2 give motor 9 power supplies; Main control unit 23 control DC-DC convs 5, the voltage-regulation of super capacitor 3 is extremely equated with storage battery 2 magnitudes of voltage of DC side, so that the electric energy of super capacitor 3 is outputed to DC side, at this moment, the electric energy of inverter 8 inversion direct current sides comes drive motor 9, realizes super capacitor 3 and storage battery 2 common drive motor 9.
Embodiment of the utility model as shown in Figure 2, comprise brake equipment 1, storage battery 2, super capacitor 3, relay 4, DC-DC conv 5, ABS system 6, brake pedal 7, inverter 8, motor 9, speed-changing mechanism 10, acceleration pedal 11 and control system 12 compositions, its super capacitor 3 is through closed-centre system of a bi-directional DC-DC converter 5 and storage battery 2 formations in parallel; Mechanical braking and electric braking are worked simultaneously, and the intensity of suitably regulating electric braking to make that the front and back wheel rate of braking meets desirable
ICurve; Described control system 12 is gathered the parameter of DC-DC conv 5, brake pedal 7, acceleration pedal 11 and inverter 8 earlier, after handling as calculated, control relay 4, DC-DC conv 5, inverter 8 and ABS system 6 are so that whole regeneration brake system is operated under the state of requirement; Described motor 9 at glancing impact through inverter 8, DC-DC conv 5 with the electrical power storage that reclaims at super capacitor 3.This regeneration brake system can be converted into electric energy with the mechanical energy of vehicle and is stored in the super capacitor 3 according to the situation of traveling state of vehicle and energy storage, and when vehicle start, provide electric energy to drive battery-driven car as energy source super capacitor 3, the consumption and the maximum starting current of storage battery 2 have been reduced, limited electric weight in the maximum performance storage battery 2, prolonged the service life of storage battery 2, the continual mileage after battery-driven car once charges is improved.Regeneration brake system has not only prolonged the continual mileage of battery-driven car, also has the advantage of optimizing vehicle braking performances.
Claims (3)
1. a regenerative braking system of electric vehicle comprises control system (12), brake pedal (7), acceleration pedal (11), storage battery (2), relay (4), super capacitor (3), DC-DC conv (5), inverter (8) and motor (9); It is characterized in that: described DC-DC conv (5) is connected with super capacitor (3), described relay (4) is connected with battery (2), relay (4) and DC-DC conv (5) access in parallel inverter (8), described inverter (8) is connected with motor (9); Described control system (12) is connected with acceleration pedal (11), brake pedal (7), relay (4), DC-DC conv (5) and inverter (8) respectively.
2. regenerative braking system of electric vehicle as claimed in claim 1 is characterized in that: described control system (12) comprises main control unit (23), driving circuit (22) and detection and change-over circuit (21); Described main control unit (23) is connected with inverter (8) with DC-DC conv (5) relay (4) respectively by driving circuit (22), is connected with inverter (8) with DC-DC conv (5) respectively with change-over circuit (21) by detecting.
3. regenerative braking system of electric vehicle as claimed in claim 1 or 2 is characterized in that: described control system links to each other with the ABS system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206136144U CN201970877U (en) | 2010-11-19 | 2010-11-19 | Regenerative braking system of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206136144U CN201970877U (en) | 2010-11-19 | 2010-11-19 | Regenerative braking system of electric vehicle |
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| CN201970877U true CN201970877U (en) | 2011-09-14 |
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| CN2010206136144U Expired - Fee Related CN201970877U (en) | 2010-11-19 | 2010-11-19 | Regenerative braking system of electric vehicle |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102501776A (en) * | 2011-10-28 | 2012-06-20 | 三门峡速达交通节能科技有限公司 | Composite power energy management prediction control system of pure-electric vehicle |
| CN102555817A (en) * | 2012-01-18 | 2012-07-11 | 原国平 | Petroleum substituted new energy vehicle |
| CN103552472A (en) * | 2013-09-19 | 2014-02-05 | 南京理工大学 | Regenerative braking method of non-road range extended electric vehicle |
| CN103997093A (en) * | 2014-05-27 | 2014-08-20 | 北京理工大学 | Real-time electric quantity management method of super capacitors of hybrid power supply |
| CN104627020A (en) * | 2015-02-07 | 2015-05-20 | 山东省滨州市火努鸟新能源科技有限公司 | Dual-mode strong magnetism direct current motor |
| CN107284249A (en) * | 2017-05-27 | 2017-10-24 | 北京新能源汽车股份有限公司 | The energy reclaiming method and system of electric automobile |
| CN112046293A (en) * | 2020-08-03 | 2020-12-08 | 盐城工学院 | Energy recovery device for electric automobile |
| CN114425954A (en) * | 2022-03-03 | 2022-05-03 | 湖南城市学院 | Energy management method and system for new energy electric vehicle storage battery composite power supply |
-
2010
- 2010-11-19 CN CN2010206136144U patent/CN201970877U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102501776A (en) * | 2011-10-28 | 2012-06-20 | 三门峡速达交通节能科技有限公司 | Composite power energy management prediction control system of pure-electric vehicle |
| CN102501776B (en) * | 2011-10-28 | 2015-01-21 | 三门峡速达交通节能科技股份有限公司 | Composite power energy management prediction control system of pure-electric vehicle |
| CN102555817A (en) * | 2012-01-18 | 2012-07-11 | 原国平 | Petroleum substituted new energy vehicle |
| CN103552472A (en) * | 2013-09-19 | 2014-02-05 | 南京理工大学 | Regenerative braking method of non-road range extended electric vehicle |
| CN103552472B (en) * | 2013-09-19 | 2015-09-30 | 南京理工大学 | Non-rice habitats stroke-increasing electric automobile regenerative braking method |
| CN103997093A (en) * | 2014-05-27 | 2014-08-20 | 北京理工大学 | Real-time electric quantity management method of super capacitors of hybrid power supply |
| CN103997093B (en) * | 2014-05-27 | 2016-09-07 | 北京理工大学 | A kind of composite power source super capacitor real time electrical quantity management method |
| CN104627020A (en) * | 2015-02-07 | 2015-05-20 | 山东省滨州市火努鸟新能源科技有限公司 | Dual-mode strong magnetism direct current motor |
| CN107284249A (en) * | 2017-05-27 | 2017-10-24 | 北京新能源汽车股份有限公司 | The energy reclaiming method and system of electric automobile |
| CN107284249B (en) * | 2017-05-27 | 2020-09-15 | 北京新能源汽车股份有限公司 | Energy recovery method and system for electric automobile |
| CN112046293A (en) * | 2020-08-03 | 2020-12-08 | 盐城工学院 | Energy recovery device for electric automobile |
| CN114425954A (en) * | 2022-03-03 | 2022-05-03 | 湖南城市学院 | Energy management method and system for new energy electric vehicle storage battery composite power supply |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20121119 |