CN102501776B - Composite power energy management prediction control system of pure-electric vehicle - Google Patents
Composite power energy management prediction control system of pure-electric vehicle Download PDFInfo
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- CN102501776B CN102501776B CN201110332811.8A CN201110332811A CN102501776B CN 102501776 B CN102501776 B CN 102501776B CN 201110332811 A CN201110332811 A CN 201110332811A CN 102501776 B CN102501776 B CN 102501776B
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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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- 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
The invention discloses a composite power energy management prediction control system of a pure-electric vehicle. The system comprises a motor, a power storage battery and a super capacitor, wherein the power storage battery and the super capacitor are connected with a motor drive control device through a bidirectional DC-DC (direct current) converter respectively; the motor drive control device is connected with the motor; and the system also comprises a microprocessor control system and a vehicular navigation system, a switch pedal potentiometer, a brake pedal potentiometer, a motor detection unit, a power storage battery energy management system and a super capacitor energy management system connected with the microprocessor control system. The system disclosed by the invention can make full use of energy resources, improve energy recovery, increase the once-charge travel distance of the electric vehicle, protect the storage battery, prolong the service life of the storage battery and enhance the power performance of the whole electric vehicle.
Description
Technical field
The invention belongs to pure electric automobile to drive and regenerative brake control technology field, be specifically related to a kind of composite power energy management prediction control system of pure-electric vehicle.
Background technology
Day by day serious along with energy shock and environmental pollution, electronlmobil, due to its energy-saving and environmental protection, energy conversion efficiency advantages of higher, obtains the great attention of industrial community and vigorously supporting of government department.At present, a key factor of restriction Development of Electric Vehicles is that its continual mileage is short, how to improve energy utilization efficiency in driving process and drag energy recovery efficiency is significant.
Current electronlmobil adopts single energy mix mostly, frequently accelerate in driving process at electronlmobil, starting and climbing are, the electric current that sparks is excessive, energy utilization efficiency and the service life of power accumulator group are had a strong impact on, and cause the tractive performance of vehicle to receive restriction, under the operating mode of city, drag frequently, the charging current fluctuating range that motor regenerative brake produces is very large, the service life of battery pack can be cut down, and the finite energy reclaimed, cause the waste of energy.By the power accumulator of high-energy-density and the super capacitor of high-specific-power being combined, significantly improve vehicle electric system performance.But the hybrid power system of current driving force storage battery and super capacitor composition adopts simple parallel-connection structure to be electric machine with energy, reasonably distribution is not managed to the energy between storage battery and super capacitor, cause not having maximized integral energy to utilize and Brake energy recovery, and control accuracy is not high.
Summary of the invention
The object of the present invention is to provide a kind of composite power energy management prediction control system of pure-electric vehicle; solve composite power source energy management in prior art and control imperfection; energy utilization efficiency and the inefficient problem of Brake energy recovery; improve electronlmobil once to charge travelled distance; can the energy be made full use of, increase energy regenerating, protection storage battery; increasing storage battery service life, improves electric automobile whole tractive performance.
In order to achieve the above object, the technical solution used in the present invention is:
A kind of composite power energy management prediction control system of pure-electric vehicle, comprise motor, power accumulator group and super capacitor, power accumulator group is connected with motor drive control device through bidirectional DC-DC converter respectively with super capacitor, motor drive control device connects motor, wherein, also comprise microprocessor control system, and the onboard navigation system be connected with microprocessor control system, electric switch pedal potential device, brake pedal potential device, electric machines test unit, power storage battery energy management system and super capacitor energy management system.
Further, described onboard navigation system (GPS/GIS) comprises global positioning system (GPS, Global Positioning System) and geographic information system (GIS, Geographic Information System), road conditions (road running mode) information can be provided to comprise the information such as the average ground speed of running car on this section, acceleration/accel, road grade, the magnitude of traffic flow, traffic signal lamp, road surface speed limit.
Further, described power accumulator group is lead-acid storage battery, lithium ion battery or nickel-hydrogen accumulator.
Further, described motor adopts permanent magnetic brushless or AC induction motor or permagnetic synchronous motor or switched reluctance machines.
Further, described electric machines test unit comprises respectively to torque sensor, speed sensor and current sensor that the torque of motor, speed, current signal gather.
Further, described electric switch pedal potential device and brake pedal potential device comprise angular velocity sensor and angular-motion transducer.
Further, described microprocessor control system circuit card is provided with microprocessor, is connected with signal filter circuit with microprocessor, photoelectric isolating device.
Further, described bidirectional DC-DC converter comprises two power switch pipe composition half-bridge structures and an inductance, and one end of inductance is connected on the point of connection of two power switch pipes.
Beneficial effect of the present invention is:
The present invention utilizes onboard navigation system to carry out forecasting research to automobile road driving condition information in following certain hour, identified after obtaining traffic information, the Detection Information of each unit of coupling system, adopts Intelligent Energy management and controlling tactics to carry out management to energy and distributes.Present invention improves the tractive performance of the startup of pure electric automobile, acceleration and climbing, improve the energy utilization efficiency in driving process, reasonable management distribution can also be carried out to energy by prediction, greatly improve drag energy recovery efficiency, extend the continual mileage of electronlmobil, power accumulator high current charge-discharge can be avoided simultaneously, improve the service life of power accumulator, and can lock torque be improved, improve the reliability and stability of brake system.
The present invention obtains the road running mode on following one section of road by onboard navigation system (GPS/GIS), identification prediction research is carried out to traffic information, use the hybrid power system of Intelligent Energy management and controlling tactics to power accumulator and super capacitor composition to carry out energy management distribution, high-octane utilization ratio and Brake energy recovery efficiency can be put forward.By reasonable energy management distribute can improve pure electric automobile startup, acceleration and climbing tractive performance, improve the energy utilization efficiency in driving process, drag energy recovery efficiency can also be improved, extend the continual mileage of electronlmobil, power accumulator high current charge-discharge can be avoided simultaneously, improve the service life of power accumulator, and can lock torque be improved, improve the reliability and stability of brake system.Controlled by unified signal transacting, control system controls more accurately and safety simultaneously.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail:
See Fig. 1, the present invention includes motor 1, power accumulator group 4 and super capacitor 6, power accumulator group 4 is connected with motor drive control device 2 through bidirectional DC-DC converter 5 respectively with super capacitor 6, motor drive control device 2 connects motor, also comprise DPS microprocessor 3, and the onboard navigation system 11 be connected with DPS microprocessor 3, electric switch pedal potential device 10, brake pedal potential device 9, electric machines test unit 7, power storage battery energy management system 12 and super capacitor energy management system 8.
Onboard navigation system 11 comprises the informations such as the average ground speed of running car on this section, acceleration/accel, road grade, the magnitude of traffic flow, traffic signal lamp, road surface speed limit to following stretch condition (road running mode) information, and sends the data to DPS microprocessor 3.
The voltage of power storage battery energy management system 12 and super capacitor energy management system 8 pairs of storage batterys and super capacitor gathers, current sensor is utilized to gather charging and discharging currents, adopt thermally dependent resistor, temperature sensor gathers temperature, and its state-of-charge is estimated, then the data of collection are sent to DPS microprocessor 3.
DSP microprocessor 3 is to the storage battery sent and super capacitor signal, electric switch pedal signal, brake pedal signal, the signal of motor collection and the traffic information of onboard navigation system collection carry out filtering process, then through the analysis of DSP microprocessor 3 identification prediction, in conjunction with energy management control policy, send energy proportion distributed intelligence, send to motor drive control device 2 through Phototube Coupling.
The structure of two bidirectional DC-DC converters 5 is identical, comprise half-bridge structure and an inductance of two power switch pipe compositions, one end of inductance is connected on the point of connection of two power switch pipes, and the pwm pulse control signal produced by motor drive control device 2 is controlled.
Motor drive control device 2, according to DPS microprocessor 3 control signal received, calculates corresponding PWM dutycycle through algorithm, controls two bidirectional DC-DC converters 5.
Principle of work of the present invention is:
From functional requirement, need the driving and the Brake energy recovery control that realize vehicle.In hybrid power system, super capacitor belongs to accessory feed, and it plays the effect of peak load shifting.As shown in Figure 1, vehicle in the process of moving, DPS microprocessor 3 receives onboard navigation system 11 and gathers following one section of road running mode information, the charged information of power accumulator group 4 and super capacitor 6, the information of electric switch pedal or brake pedal electrical potential information and electric machines test unit 7 detection, process after filtering, DSP microprocessor 3 pairs of information carry out identification prediction analysis, use energy control strategy, the discharge and recharge ratio of motivation of adjustment battery pack 4 discharge and recharge and super capacitor 6, export control signal through Phototube Coupling process, send to motor drive control device 2, the conducting of the power switch pipe in further control two bidirectional DC-DC converters 5 and cut-off, and then control the energy management of power accumulator and super capacitor, this system is a set of closed loop control system.
Claims (7)
1. a composite power energy management prediction control system of pure-electric vehicle, comprise motor (1), power accumulator group (4) and super capacitor (6), power accumulator group (4) is connected with motor drive control device (2) through bidirectional DC-DC converter (5) respectively with super capacitor (6), motor drive control device (2) connects motor, it is characterized in that: also comprise microprocessor (3), and the onboard navigation system (11) to be connected with microprocessor (3), electric switch pedal potential device (10), brake pedal potential device (9), electric machines test unit (7), power storage battery energy management system (12) and super capacitor energy management system (8), described bidirectional DC-DC converter (5) comprises two power switch pipe composition half-bridge structures and an inductance, and one end of inductance is connected on the point of connection of two power switch pipes, described power storage battery energy management system (12) and super capacitor energy management system (8) comprise current sensor, thermally dependent resistor and temperature sensor, described microprocessor (3) can carry out filtering process to storage battery and super capacitor signal, electric switch pedal signal, brake pedal signal, motor signal and traffic information, and after microprocessor (3) discriminance analysis, sends energy proportion distributed intelligence to motor drive control device (2), described motor drive control device (2) can draw PWM dutycycle by algorithm, and controls two bidirectional DC-DC converters (5).
2. according to a kind of composite power energy management prediction control system of pure-electric vehicle described in claim 1, it is characterized in that: described onboard navigation system (11) comprises global positioning system and to unify geographic information system.
3. according to a kind of composite power energy management prediction control system of pure-electric vehicle described in claim 1, it is characterized in that: described power accumulator group (4) is lead-acid storage battery, lithium ion battery or nickel-hydrogen accumulator.
4. according to a kind of composite power energy management prediction control system of pure-electric vehicle described in claim 1, it is characterized in that: described motor adopts permanent magnetic brushless or AC induction motor or permagnetic synchronous motor or switched reluctance machines.
5. according to a kind of composite power energy management prediction control system of pure-electric vehicle described in claim 1, it is characterized in that: described electric machines test unit (7) comprises respectively to torque sensor, speed sensor and current sensor that the torque of motor (1), speed, current signal gather.
6. according to a kind of composite power energy management prediction control system of pure-electric vehicle described in claim 1, it is characterized in that: described electric switch pedal potential device (10) and brake pedal potential device (9) comprise angular velocity sensor and angular-motion transducer.
7. according to a kind of composite power energy management prediction control system of pure-electric vehicle described in claim 1, it is characterized in that: described microprocessor (3) is connected with signal filter circuit, photoelectric isolating device.
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| CN201110332811.8A CN102501776B (en) | 2011-10-28 | 2011-10-28 | Composite power energy management prediction control system of pure-electric vehicle |
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| CN104354654B (en) * | 2014-09-19 | 2017-03-29 | 北京新能源汽车股份有限公司 | Integrated control device based on pure electric automobile |
| CN105825700B (en) * | 2015-01-29 | 2018-01-02 | 南京工程学院 | Navigation system and method for work, the navigation automobile using the navigation system |
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| CN110834551A (en) * | 2019-11-15 | 2020-02-25 | 北京理工大学 | Energy management control system of pure electric vehicle |
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