CN103872729B - The hybrid electric vehicle composite power source that sef-adapting filter power dividing controls and method - Google Patents
The hybrid electric vehicle composite power source that sef-adapting filter power dividing controls and method Download PDFInfo
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- CN103872729B CN103872729B CN201410080123.0A CN201410080123A CN103872729B CN 103872729 B CN103872729 B CN 103872729B CN 201410080123 A CN201410080123 A CN 201410080123A CN 103872729 B CN103872729 B CN 103872729B
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- power
- ultracapacitor
- sef
- adapting filter
- power source
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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
- Y02T10/80—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 hybrid electric vehicle composite power source and the method for a kind of sef-adapting filter power dividing control.This composite power source comprises storage battery, ultracapacitor and two-way DC/DC converter.Storage battery is directly connected with power bus, as main power source; Ultracapacitor is connected with power bus by two-way DC/DC converter, accessory power supply in series with bidirectional DC-DC converter.The present invention adopts sef-adapting filter power dividing control method to control two-way DC/DC converter.In composite power source, ultracapacitor carries out power back-off to storage battery, and avoid battery and provide instantaneous power and peak power, the whole efficiency of composite power source significantly improves; Ultracapacitor can high current charge-discharge quickly and efficiently, has reclaimed regenerating braking energy to greatest extent; Sef-adapting filter power dividing control method achieves the reasonable distribution of power, ensure that each parts of composite power source are all than more efficient, achieve good control effects.
Description
Technical field
The present invention relates to energy storage device and control method thereof that one is applied to hybrid vehicle (HEV), storage battery and ultracapacitor to be combined formation composite power source in particular to one, and composite power source adopts the hybrid electric vehicle composite power source of sef-adapting filter power dividing control method.
Background technology
Due to the intensification day by day of the day by day serious of environmental pollution and energy crisis, hybrid vehicle has developed into a kind of inexorable trend by means of the advantage of its energy-saving and environmental protection.The core of hybrid vehicle environmental protection and energy saving theory utilizes energy-storage system to carry out " peak load shifting " duty requirements power, reclaims kinetic energy during braking, make whole dynamical system efficiency higher.In more than ten years in the past, hybrid vehicle (HEV) obtains good development in commercial and civilian.
However, the performance of hybrid vehicle and the scope of application still do not reach with natural gas is the orthodox car of power source.The reason of this problem is caused to be that energy-storage system of accumulator specific power is lower, cycle life is short, be mainly reflected in HEV at instantaneous starting and accelerate time battery be difficult to meet load high power density demand and in fast braking time energy fully reclaim, thus limit the fast development of HEV.For this reason, be necessary to increase accessory power supply to provide peak power and to reclaim braking energy fast.Ultracapacitor relies on its high-specific-power and has extended cycle life is optimal selection undoubtedly, by storage battery and ultracapacitor formation composite power source used in combination, both intrinsic advantages can be given full play to, limit the deficiency of single power supply simultaneously to greatest extent, will greatly improve the efficiency of HEV energy-storage system.
Summary of the invention
For the problems referred to above that the energy-storage system of accumulator of hybrid vehicle in prior art exists, the invention provides hybrid electric vehicle composite power source and the method for a kind of sef-adapting filter power dividing control.This composite power source is made up of storage battery and ultracapacitor, for giving full play to the advantage that ultracapacitor specific power is large and storage battery specific energy is large, dispatching ultracapacitor in time in order to the change of sailing operating mode according to hybrid electric vehicle carries out power back-off to storage battery simultaneously, a DC/DC converter is added between storage battery and ultracapacitor, by conducting and the shutoff of control DC/DC converter switches pipe, thus realize the reasonable distribution of power between storage battery and ultracapacitor.
The technical solution adopted for the present invention to solve the technical problems is:
The hybrid electric vehicle composite power source that sef-adapting filter power dividing controls, comprises storage battery, ultracapacitor and two-way DC/DC converter; Described storage battery is directly connected with power bus, as main power source; Described ultracapacitor is connected with power bus by two-way DC/DC converter, accessory power supply in series with bidirectional DC-DC converter.
Further, described bidirectional DC-DC converter adopts non-isolated half-bridge structure.
Further, the bidirectional DC-DC converter of described non-isolated half-bridge structure comprises with resistive
filter inductance
, power switch pipe
and power switch pipe
.Filter inductance
and power switch pipe
the positive pole of ultracapacitor and storage battery is connected to, power switch pipe after series connection
one end and filter inductance
output be connected, the other end is connected with the negative pole of storage battery with ultracapacitor, and the electric current of described storage battery and ultracapacitor can be
,
with
between two-way flow.
The sef-adapting filter power dividing control method of the hybrid electric vehicle composite power source that sef-adapting filter power dividing controls, described bidirectional DC-DC converter adopts sef-adapting filter power dividing control method.That is, according to the change of ultracapacitor parameter, by low pass filter time constant
adaptively selected, load demand power is divided into two parts, peak power and average power; Load demand power obtains average power after low pass filter, and average power is provided by storage battery; Load demand power and average power are subtracted each other and obtain peak power, peak power is provided by ultracapacitor.
Further, described time constant
adaptive selection method be: first, by the output voltage of ultracapacitor
with its reference voltage
compare, generate the pulse-modulated signal controlling power inverter; Then, apply an electric current and correct link.
Further, described electric current rectification link is: first, get the operating current of ultracapacitor
with its reference current
compare; Secondly, introduce operating mode and state-of-charge (SOC) conduct rectification link, obtain target SOC by the relation of ultracapacitor SOC and operating mode, then compared with actual SOC, obtain electric current through PI adjustment and correct link.
The invention has the beneficial effects as follows:
In the hybrid electric vehicle composite power source that sef-adapting filter power dividing of the present invention controls, ultracapacitor has given full play to that its power density is large, the advantage of fast charging and discharging, compensate for the peak power needed for load widely, avoid battery and provide instantaneous power and peak power, the whole efficiency of composite power source significantly improves; In addition, ultracapacitor can high current charge-discharge quickly and efficiently, absorb regenerating braking energy to greatest extent, save the energy widely, Battery recycling energy is less, which reduces the cycle charge-discharge number of times of storage battery, avoids the heavy current impact to storage battery, extend the useful life of storage battery, put forward high-octane utilance.Sef-adapting filter power dividing control method of the present invention makes ultracapacitor mainly bear peak power in bearing power, storage battery then mainly bears average power, thus realize the power back-off of ultracapacitor to storage battery and the reasonable distribution of power, ensure that each parts of composite power source are all than more efficient, achieve good control effects, extend the cycle life of storage battery.
Accompanying drawing explanation
Fig. 1 is the structure chart of the hybrid electric vehicle composite power source that sef-adapting filter power dividing of the present invention controls;
Fig. 2 is the structure chart of two-way DC/DC converter in composite power source;
Fig. 3 is sef-adapting filter power dividing control block diagram.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
The structure of the hybrid electric vehicle composite power source that sef-adapting filter power dividing of the present invention controls as shown in Figure 1, comprises storage battery, ultracapacitor and DC/DC converter.Storage battery specific energy is comparatively large, it is directly connected with power bus, provides the average power in bearing power as main power source; Because ultracapacitor specific power is comparatively large, passed through DC/DC converter and be connected with power bus, accessory power supply in series with DC-DC converter, mainly provides the peak power in bearing power.The benefit of this structure is that storage battery determines busbar voltage, directly external power output, and energy conversion efficiency is high; And ultracapacitor regulates its voltage to mate work with battery by DC/DC converter automatically, effectively protect storage battery.Because the change in voltage of battery is relatively milder, therefore regulating and controlling voltage is more prone to realize.Composite power source should realize the energy supply to load, and also fully will reclaim regenerated energy during hybrid vehicle braking, therefore two-way DC/DC converter selected by DC/DC converter simultaneously.For the power division of storage battery in composite power source and ultracapacitor, after all, undertaken by this process of electric current injected more or less in regulating the duty ratio of two-way DC/DC converter to ultracapacitor.
The structure of above-mentioned two-way DC/DC converter as shown in Figure 2, wherein,
with
be respectively electric current and the voltage of ultracapacitor;
with
be respectively electric current and the voltage of storage battery;
with
for power switch pipe;
for with resistive
filter inductance.Bidirectional DC-DC converter adopts non-isolated half-bridge structure, comprises with resistive
filter inductance
, power switch pipe
and power switch pipe
.Filter inductance
and power switch pipe
the positive pole of ultracapacitor and storage battery is connected to, power switch pipe after series connection
one end and filter inductance
output be connected, the other end is connected with the negative pole of storage battery with ultracapacitor, and the electric current of described storage battery and ultracapacitor can be
,
with
between two-way flow, namely in fig. 2, bidirectional DC-DC converter can realize two quadrants run, namely converter both end voltage direction is constant, the sense of current change, be functionally equivalent to the combination of booster converter and buck converter.If
the cycle is opened for switching tube,
for duty ratio, when
during shutoff,
?
open-minded in time, ultracapacitor releases energy; Equally, when
when opening,
turn-off time be
, ultracapacitor absorbs energy.This structural components quantity is few, cheap, and do not have transformer loss, efficiency is high, be easy to packaging and integrated.
The sef-adapting filter power dividing control method of the hybrid electric vehicle composite power source that sef-adapting filter power dividing of the present invention controls as shown in Figure 3, wherein,
with
be respectively the power of ultracapacitor and the power of storage battery;
for the time constant of low pass filter;
for the state-of-charge of ultracapacitor;
for the reference value of ultracapacitor state-of-charge;
for the reference value of ultracapacitor voltage;
for the current reference value of ultracapacitor;
for the improvement factor of ultracapacitor electric current.In figure 3, the sef-adapting filter power dividing control method that bidirectional DC-DC converter adopts utilizes filter bearing power to be divided into two parts, peak power and average powers.Linear low-pass filters got by filter, and load demand power obtains average power after low pass filter, and average power provides primarily of storage battery; Subtract each other by demand gross power and average power and just can obtain peak power, peak power provides primarily of ultracapacitor.Filter time constant
setting be the core of control strategy, and ultracapacitor is the main object of control strategy, so right according to the change of ultracapacitor parameter
carry out adaptively selected.By the output voltage of ultracapacitor
with its reference voltage
compare, generate the pulse-modulated signal controlling power inverter.It should be noted that this control strategy must apply an enough strong electric current correct link, even if thus guarantee under the poorest load operating condition, the output voltage of ultracapacitor can not exceed its range of nominal tension.First, the operating current of ultracapacitor is got
with its reference current
compare; Secondly, in order to allow the demand of composite power source adaptation condition better, adaptively according to operating mode situation rational management ultracapacitor, introduce operating mode and SOC as rectification link, ultracapacitor is kept one's powder dry the next running status of hybrid vehicle (HEV).Such as, when HEV is low speed driving, next state is likely acceleration, and therefore along with the reduction control DC/DC of the speed of a motor vehicle charges to ultracapacitor, ultracapacitor absorbs more energy, ready for accelerating; Or when HEV is when running at high speed, next state is likely braking, and ultracapacitor should leave enough capacity and fully reclaim braking energy.Therefore, we obtain target SOC by the relation of ultracapacitor SOC and operating mode, then compared with actual SOC, regulate obtain electric current rectification link through PI.It should be noted that working conditions change can be embodied in the change of the speed of a motor vehicle.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. the sef-adapting filter power dividing control method of the hybrid electric vehicle composite power source of a sef-adapting filter power dividing control, the hybrid electric vehicle composite power source that described sef-adapting filter power dividing controls, comprises storage battery, ultracapacitor and bidirectional DC-DC converter; Described storage battery is directly connected with power bus, as main power source; Described ultracapacitor is connected with power bus by bidirectional DC-DC converter, accessory power supply in series with bidirectional DC-DC converter; It is characterized in that: described bidirectional DC-DC converter adopts sef-adapting filter power dividing control method; Namely, according to the change of ultracapacitor parameter, adaptively selected by low pass filter timeconstantτ, load demand power is divided into two parts, peak power and average power, load demand power obtains average power after low pass filter, and average power is provided by storage battery, load demand power and average power are subtracted each other and obtain peak power, peak power is provided by ultracapacitor.
2. the sef-adapting filter power dividing control method of the hybrid electric vehicle composite power source of sef-adapting filter power dividing control according to claim 1, it is characterized in that: the adaptive selection method of described timeconstantτ is: first, by the output voltage V of ultracapacitor
ucwith its reference voltage V
uc-refcompare, generate the pulse-modulated signal controlling bidirectional DC-DC converter; Then, apply an electric current and correct link.
3. the sef-adapting filter power dividing control method of the hybrid electric vehicle composite power source of sef-adapting filter power dividing control according to claim 2, is characterized in that: described electric current is corrected link and is: first, get the operating current I of ultracapacitor
ucwith its reference current I
uc-refcompare; Secondly, introducing operating mode and state-of-charge SOC, as rectification link, obtain target SOC by the relation of ultracapacitor SOC and operating mode, then compared with actual SOC, regulate obtain electric current rectification link through PI.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410080123.0A CN103872729B (en) | 2014-03-06 | 2014-03-06 | The hybrid electric vehicle composite power source that sef-adapting filter power dividing controls and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410080123.0A CN103872729B (en) | 2014-03-06 | 2014-03-06 | The hybrid electric vehicle composite power source that sef-adapting filter power dividing controls and method |
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| Publication Number | Publication Date |
|---|---|
| CN103872729A CN103872729A (en) | 2014-06-18 |
| CN103872729B true CN103872729B (en) | 2015-09-02 |
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| TWI603872B (en) * | 2015-11-13 | 2017-11-01 | 財團法人工業技術研究院 | Power supply device and power supply method for cruise control |
| CN106828125A (en) * | 2016-12-30 | 2017-06-13 | 湖南大学 | Permanent magnetism driven by power vehicle powering system and its control method |
| CN109050519A (en) * | 2018-08-24 | 2018-12-21 | 中车青岛四方车辆研究所有限公司 | Vehicle hybrid system, vehicle and control method |
| CN109835199B (en) * | 2018-12-25 | 2020-10-30 | 江苏理工学院 | Power distribution optimization method for vehicle-mounted composite power supply |
| CN109878507B (en) * | 2019-01-14 | 2020-07-28 | 江苏理工学院 | Vehicle-mounted hybrid power supply energy management control method based on lambda factor |
| CN109889131B (en) * | 2019-01-28 | 2020-07-28 | 江苏理工学院 | Method for inhibiting temperature effect of hybrid power supply driving system of electric automobile |
| CN113771827A (en) * | 2021-08-30 | 2021-12-10 | 江苏大学 | Mode switching coordination control method of hybrid electric vehicle based on finite time state extended observer and time-lag compensation controller |
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| CN1829058A (en) * | 2006-03-16 | 2006-09-06 | 复旦大学 | DC/DC controller for realizing self-adaptive voltage adjustment technique |
| CN103312020B (en) * | 2013-06-14 | 2016-04-27 | 江苏大学 | Hybrid Vehicle composite power source is controlled based on Modified Filter power dividing |
| CN203747469U (en) * | 2014-03-06 | 2014-07-30 | 江苏大学 | Hybrid vehicle hybrid power supply of self-adaptive filter power dividing control |
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