CN106026290A - Super capacitor large-current equalization method based on DSP control - Google Patents
Super capacitor large-current equalization method based on DSP control Download PDFInfo
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- CN106026290A CN106026290A CN201610565993.6A CN201610565993A CN106026290A CN 106026290 A CN106026290 A CN 106026290A CN 201610565993 A CN201610565993 A CN 201610565993A CN 106026290 A CN106026290 A CN 106026290A
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- super capacitor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
Abstract
The invention discloses a super capacitor large-current equalization method based on DSP control. A super capacitor control system is set, which comprises at least two series-connected super capacitors, the same number of first contactors and second contactors as the super capacitors, a large-current discharge resistor, a super capacitor voltage detection module, a DSP controller, and a protection device. The DSP controller acquires the voltage of each super capacitor through the super capacitor voltage detection module. When the degree of equalization between the super capacitors is greater than a set threshold, the super capacitor with the highest voltage is discharged by the large-current discharge resistor according to a set time. A DSP is used as a main equalization controller, which improves the control speed of the system. A contactor matrix is adopted to discharge the super capacitors at large current, so the reliability of equalization is improved, and large-current discharge is realized. The method is simple to operate, safe and reliable, has a good equalization effect.
Description
Technical field
The invention belongs to the balancing technique field of super capacitor, particularly to a kind of super capacitor big current balance method controlled based on DSP.
Background technology
The development of fuel-engined vehicle causes the huge consumption of petroleum resources, the continuous intensification of global energy crisis, exacerbates the harm of greenhouse effect and atmospheric pollution simultaneously.Most countries, government and Automobile Enterprises are all it is well recognized that energy-saving and emission-reduction are the developing direction of future automobile industry in the world, and Development of EV will be the optimum method solving this difficult point.It is low that electric automobile has noise, emission-free discharge, environmental friendliness, and the thermal efficiency is high, discharges low, and recoverable improves the advantages such as energy resource structure.Each automobile production enterprise the most actively researches and develops electric automobile, and Chinese Government is also actively promoting electric automobile.Electric automobile can be roughly divided into pure electric automobile, hybrid-electric car and FC-EV according to power source.These electric automobiles can configure super capacitor as energy-storage travelling wave tube, particularly in pure electric automobile extensively application many strings super capacitor as power source.
Super capacitor is a kind of novel energy-storing element utilizing electric double layer principle directly to store electric energy, its range of capacity typically from several farads to tens thousand of farads, there is the highest power density, and charge/discharge rates is very fast, in several seconds, fully charged state can be arrived from complete discharge condition.
Owing to each monomer of super capacitor group is all different individuality, in production technology, the factor such as production time causes super capacitor performance index to there is difference.Although along with the continuous progress of technology, before dispatching from the factory, the difference between super capacitor inside constantly reduces, but during using, faint discordance constantly can be amplified along with use condition.Such discordance is by increasing with design load deviation for the capacity causing whole group of super capacitor.In charging process, first the monomer that capacity is little will be filled, and cause the super capacitor of other capacity can not obtain enough capacity；In discharge process, first the monomer that capacity is little is discharged into blanking voltage, and stopping is discharged by whole group of super capacitor.The existence of such problem of inconsistency, active volume and service life of causing super capacitor group etc., aspect was far away from monomer super capacitor, and increased the difficulty being managed super capacitor and controlling.Practice have shown that, significantly reduce when the consistency problem of super capacitor group develops into indivedual super capacitor generation capacity, when internal resistance such as significantly improves at the situation, the performance of whole group of super capacitor can be at short time high progression, so that whole super capacitor group is scrapped.
In order to solve super capacitor group problem of inconsistency, there has been proposed the balancing technique of super capacitor.The voltage to the effect that detecting super capacitor group of balanced management, the parameter such as electric current, these parameters are identified, analyze the concordance of super capacitor, by controlling device, the monomer of energy height is discharged, make the state of each monomer reach unanimity.Can be improved the consistency problem of super capacitor group by effective Balance route strategy and equalizing circuit, it is possible to extend the life-span of super capacitor group, reduce the maintenance cost of super capacitor group, the electric automobile making safe and efficient intelligence use puts it over.
The most general equalization methods is that each super capacitor is configured a discharge resistance, by checking the voltage of each monomer, is discharged the monomer that monomer is higher by the discharge resistance of oneself correspondence.When super capacitor Capacity Ratio is bigger, this discharge resistance discharge current would become hard to meet the requirement of fast uniform.If discharge resistance power corresponding for each super capacitor is become big, its volume and heat radiation are by the face of new challenge, the method that the method for existing employing resistance equilibrium seldom has big current balance.
Summary of the invention
It is an object of the invention to provide a kind of super capacitor big current balance method controlled based on DSP.
Concretely comprise the following steps:
(1) a set of super capacitor control system is set; including super capacitor group, heavy-current discharge resistance, super-capacitor voltage detection module, dsp controller and protection device; wherein super capacitor group includes at least two super capacitors connected, all corresponding first catalyst of each super capacitor and second catalyst；The positive pole of each super capacitor is connected to the first end of heavy-current discharge resistance by the first catalyst of its correspondence, and the negative pole of each super capacitor is connected to the second end of heavy-current discharge resistance by the second catalyst of its correspondence；The positive pole of super capacitor can be connected with super-capacitor voltage detection module with negative pole with being energized；Dsp controller includes that CAN terminal and control terminal, CAN terminal are connected with super-capacitor voltage detection module, and the control terminal of control terminal and the first catalyst and the second catalyst connects；When dsp controller controls the first catalyst corresponding to super capacitor and the conducting of the second catalyst, super capacitor and heavy-current discharge resistor coupled in parallel, synchronization only one of which super capacitor and heavy-current discharge resistor coupled in parallel；Protection device includes that D.C. contactor and resettable fuse, D.C. contactor and resettable fuse are cascaded and is followed by the negative pole of super capacitor group.
Described super capacitor is basic supercapacitive cell i.e. monomer super capacitor or the super capacitor brick composed in parallel by multiple basic supercapacitive cell.
(2) the super capacitor control system that step (1) is arranged is run according to following steps:
a.
Dsp controller communicates with super-capacitor voltage detection module, it is thus achieved that the voltage of each super capacitor.
b.
Dsp controller, according to the N number of super-capacitor voltage obtained, finds out the super capacitor that magnitude of voltage is maximum, and wherein N is more than or equal to 2.
c.
Dsp controller obtains the average voltage of all super capacitors.
d.
Jump into step e when the super-capacitor voltage of magnitude of voltage maximum and the average voltage deviations of all super capacitors set threshold values more than one, otherwise return to step a.
e.
Super capacitor, by controlling the first catalyst corresponding to the maximum super capacitor of voltage and the second catalyst makes the maximum super capacitor of voltage and heavy-current discharge resistor coupled in parallel, is discharged by DSP.
f.
Waiting the time T set, dsp controller disconnects all contactless contactors by control terminal, and program returns step a.
(3) the big current balance of super capacitor that step (2) i.e. realizes controlling is completed based on DSP.
The inventive method uses a kind of super capacitor control system, this super capacitor control system includes the charging and discharging balance device of super capacitor, super capacitor system is made effectively to be managed in charge and discharge process and equalize, to improve efficiency and the service life of super capacitor system, and reduce the maintenance cost of super capacitor system；The present invention uses DSP as primary equalization controller, improves system and controls speed；The present invention uses catalyst matrix-style, it is achieved the heavy-current discharge to super capacitor, to improve the reliability of equilibrium, and realizes heavy-current discharge；The inventive method is simple to operate, safe and reliable, and portfolio effect is good.
Accompanying drawing explanation
Fig. 1 is the structural representation of the super capacitor control system used in the embodiment of the present invention.
Fig. 2 is the balance control method flow chart in embodiment of the present invention charge and discharge process.
Detailed description of the invention
Embodiment:
The present invention is further described below in conjunction with the accompanying drawings.
Hereinafter describe and be used for disclosing the present invention so that those skilled in the art are capable of the present invention.Preferred embodiment in below describing is only used as citing, it may occur to persons skilled in the art that other obvious modification.The ultimate principle of the present invention defined in the following description can apply to other embodiments, deformation program, improvement project, equivalent and the other technologies scheme without departing from the spirit and scope of the present invention.
As it is shown in figure 1, a kind of super capacitor big current balance method controlled based on DSP, concretely comprise the following steps:
(1) a set of super capacitor control system is set; including super capacitor group, heavy-current discharge resistance R (carrying the high-power resistance of radiator), super-capacitor voltage detection module, dsp controller and protection device; wherein super capacitor group includes at least two super capacitors connected, all corresponding first catalyst of each super capacitor and second catalyst；The positive pole of each super capacitor is connected to the first end of heavy-current discharge resistance by the first catalyst of its correspondence, and the negative pole of each super capacitor is connected to the second end of heavy-current discharge resistance by the second catalyst of its correspondence；The positive pole of super capacitor can be connected with super-capacitor voltage detection module with negative pole with being energized；Dsp controller includes that CAN terminal and control terminal, CAN terminal are connected with super-capacitor voltage detection module, and the control terminal of control terminal and the first catalyst and the second catalyst connects；When dsp controller controls the first catalyst corresponding to super capacitor and the conducting of the second catalyst, super capacitor and heavy-current discharge resistor coupled in parallel, synchronization only one of which super capacitor and heavy-current discharge resistor coupled in parallel；Protection device includes that D.C. contactor and resettable fuse, D.C. contactor and resettable fuse are cascaded and is followed by the negative pole of super capacitor group.
Described super capacitor is basic supercapacitive cell i.e. monomer super capacitor.
The negative pole of equilibrium object super capacitor 1 connects with the positive pole of Jun Heng object super capacitor 2, the negative pole of described equilibrium object super capacitor 2 connects with the positive pole of Jun Heng object super capacitor 3, it is sequentially connected in series each equilibrium object super capacitor, until the negative pole of equilibrium object super capacitor N-1 connects with the positive pole of Jun Heng object super capacitor N, all super capacitors are sequentially connected in series super capacitor group, in described super capacitor group, the positive pole of the most described super capacitor group of described equilibrium object super capacitor 1, the negative pole that negative pole is described super capacitor group of described equilibrium object super capacitor N.
The positive pole of each described equilibrium object super capacitor is connected with first end of described heavy-current discharge resistance R by corresponding described first catalyst, the negative pole of each described equilibrium object super capacitor is connected with second end of described heavy-current discharge resistance R by corresponding described second catalyst, is connected with the control terminal of described dsp controller after the control terminal K parallel connection of described first catalyst and described second catalyst.
The D1 terminal of each described first catalyst connects with the positive pole of described equilibrium object super capacitor, and D2 terminal is connected with first end of described heavy-current discharge resistance R, and control terminal K and DSP control terminal is connected.
The D1 terminal of each described second catalyst connects with the negative pole of described equilibrium object super capacitor, and D2 terminal is connected with second end of described heavy-current discharge resistance R, and control terminal K and DSP control terminal is connected.
Described super-capacitor voltage detection module can be connected with positive pole and the negative pole of described super capacitor with being energized, for detecting the voltage of each super capacitor；Linked with described dsp controller by CAN, send the voltage signal detected to dsp controller.
(2) as in figure 2 it is shown, the super capacitor control system that step (1) is arranged is run according to following steps:
a.
Dsp controller communicates with super-capacitor voltage detection module, it is thus achieved that the voltage of each super capacitor.
b.
Dsp controller, according to the N number of super-capacitor voltage obtained, finds out the super capacitor that magnitude of voltage is maximum, and wherein N is more than or equal to 2.
c.
Dsp controller obtains the average voltage of all super capacitors.
d.
Jump into step e when the super-capacitor voltage of magnitude of voltage maximum and the average voltage deviations of all super capacitors set threshold values more than one, otherwise return to step a.
e.
Super capacitor, by controlling the first catalyst corresponding to the maximum super capacitor of voltage and the second catalyst makes the maximum super capacitor of voltage and heavy-current discharge resistor coupled in parallel, is discharged by DSP.
f.
Waiting the time T set, dsp controller disconnects all contactless contactors by control terminal, and program returns step a.
(3) the big current balance of super capacitor that step (2) i.e. realizes controlling is completed based on DSP.
Claims (1)
1. the super capacitor big current balance method controlled based on DSP, it is characterised in that concretely comprise the following steps:
(1) a set of super capacitor control system is set; including super capacitor group, heavy-current discharge resistance, super-capacitor voltage detection module, dsp controller and protection device; wherein super capacitor group includes at least two super capacitors connected, all corresponding first catalyst of each super capacitor and second catalyst；The positive pole of each super capacitor is connected to the first end of heavy-current discharge resistance by the first catalyst of its correspondence, and the negative pole of each super capacitor is connected to the second end of heavy-current discharge resistance by the second catalyst of its correspondence；The positive pole of super capacitor can be connected with super-capacitor voltage detection module with negative pole with being energized；Dsp controller includes that CAN terminal and control terminal, CAN terminal are connected with super-capacitor voltage detection module, and the control terminal of control terminal and the first catalyst and the second catalyst connects；When dsp controller controls the first catalyst corresponding to super capacitor and the conducting of the second catalyst, super capacitor and heavy-current discharge resistor coupled in parallel, synchronization only one of which super capacitor and heavy-current discharge resistor coupled in parallel；Protection device includes that D.C. contactor and resettable fuse, D.C. contactor and resettable fuse are cascaded and is followed by the negative pole of super capacitor group；
Described super capacitor is basic supercapacitive cell i.e. monomer super capacitor or the super capacitor brick composed in parallel by multiple basic supercapacitive cell；
(2) the super capacitor control system that step (1) is arranged is run according to following steps:
A. dsp controller communicates with super-capacitor voltage detection module, it is thus achieved that the voltage of each super capacitor；
B. dsp controller is according to the N number of super-capacitor voltage obtained, and finds out the super capacitor that magnitude of voltage is maximum, and wherein N is more than or equal to 2；
C. dsp controller obtains the average voltage of all super capacitors；
D. jump into step e when the super-capacitor voltage of magnitude of voltage maximum and the average voltage deviations of all super capacitors set threshold values more than one, otherwise return to step a；
E. DSP is by controlling the first catalyst corresponding to the maximum super capacitor of voltage and the second catalyst makes the maximum super capacitor of voltage and heavy-current discharge resistor coupled in parallel, discharges super capacitor；
F. waiting the time T of setting, dsp controller disconnects all contactless contactors by control terminal, and program returns step a；
(3) the big current balance of super capacitor that step (2) i.e. realizes controlling is completed based on DSP.
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| CN201610565993.6A CN106026290A (en) | 2016-07-19 | 2016-07-19 | Super capacitor large-current equalization method based on DSP control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106532816A (en) * | 2016-11-11 | 2017-03-22 | 桂林理工大学 | FPGA control-based high current balancing method of super-capacitors |
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Application publication date: 20161012 |