CN103618360B - Multi-monomer directly equalizing device and method of series battery pack - Google Patents
Multi-monomer directly equalizing device and method of series battery pack Download PDFInfo
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- CN103618360B CN103618360B CN201310653378.7A CN201310653378A CN103618360B CN 103618360 B CN103618360 B CN 103618360B CN 201310653378 A CN201310653378 A CN 201310653378A CN 103618360 B CN103618360 B CN 103618360B
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Abstract
The invention provides a multi-monomer directly equalizing device and method of a series battery pack, and relates to a monometer equalizing circuit of the series battery pack. The multi-monomer directly equalizing device and method of the series battery pack solve the problems that direct energy transfer between any two energy storage monomers can not be achieved, the energy equalizing path is long and the energy equalizing efficiency is low according to an existing energy equalizing device between the energy storage monomers. The series battery pack is formed by series connection of m+n monomer batteries. The multi-monomer directly equalizing device comprises a transformer and m+n bilateral switches, wherein the transformer is provided with m+n windings, the first m energy storage monomers in the series battery pack are used as the first group, and the last n energy storage monomers in the series battery pack are used as the second group; m coils in the m+n windings of the transformer are in one-to-one correspondence with the m energy storage monomers in the first group respectively, and the rest of the n coils are in one-to-one correspondence with the n energy storage monomers in the second group respectively; the m+n windings share one magnetic core, and the number of turns of the m+n windings is equal, so the energy direct transfer between any two energy storage monomers can be achieved. The multi-monomer directly equalizing device and method can be applied to the field of energy equilibrium of the series energy storage monomers.
Description
Technical field
The present invention relates to a kind of series battery monomer equalizing circuit.
Background technology
Energy and environment problem has become the focus of global concern, and various new energy technology emerges in an endless stream, and thereupon also proposes requirements at the higher level to energy storage technologies.Electrokinetic cell or ultracapacitor are that main voltage-type accumulation power supply group has the advantages such as higher power is close, safely cleaning usually, have been widely used in the technical field that electric automobile, space power system, output pulses device etc. need stored energy.No matter electrokinetic cell or ultracapacitor, the electric pressure of energy storage monomer is all lower, usually can by accumulation power supply group suitable for several even hundreds of monomer series-connected formation voltage in practical application.Because the difficult parameters of each energy storage monomer is completely the same to ensure, in series-connection charge-discharge process, very easily occur overcharging or cross and putting phenomenon of certain or some monomers, cause series-connected cell pool-size and security performance to reduce, cycle life reduces.Therefore the balancing energy between energy storage monomer becomes one of key technology of series battery practical application.
At present, there is a variety of balanced topological structure based on Switching Technique both at home and abroad, roughly can be divided into following three classes:
The first kind to realize the balanced topological mechanism of flying capacitance formula that monomer directly transmits monomer energy;
Equations of The Second Kind to realize the bi-directional of energy between adjacent two monomers or the balanced topological structure transmitted successively of multiple adjacent monomer single direction energy;
3rd class to realize the energy transferring between monomer and series battery, and namely local is to the balanced topological structure of the overall or overall energy transferring to local.
The balanced topological structure of first kind flying capacitance formula is to the direct transmission that can realize point-to-point energy, but owing to employing a large amount of switching devices, complexity in circuits increases, and circuit reliability is difficult to ensure; And the balanced topological structures of other two classes are when carrying out the transmission of energy between non-adjacent monomer, all cannot realize the great-leap-forward transmission of energy, in balancing procedure, equilibrium path is long, balancing speed is slow, equalization efficiency is low.
Summary of the invention
The present invention is in order to the balancing energy device solved between existing energy storage monomer cannot solve DIRECT ENERGY transmission between any two energy storage monomers, balancing energy path length and the inefficient problem of balancing energy, the invention provides the direct balancer of the many monomers of a kind of series battery and method.
The direct balancer of the many monomers of series battery, described series battery is composed in series by m+n cell, and the direct balancer of described many monomers comprises transformer and m+n bidirectional switch, m and n is the positive integer being greater than 1;
Described transformer has m+n winding, and the number of turn of m+n winding is all identical;
Front m cell in series battery is first group, and a rear n cell is second group;
Have in m+n winding of described transformer m coil respectively with the m in first group cell one_to_one corresponding, in m+n winding of described transformer all the other n coil respectively with the n in second group cell one_to_one corresponding,
I-th winding and i-th bidirectional switch and i-th cell are connected in series, and described i-th bidirectional switch is connected between the positive pole of i-th cell and the Same Name of Ends of i-th winding, i=1,2 ... m;
A jth winding and a jth bidirectional switch and a jth cell are connected in series, and the Same Name of Ends of a described jth winding is connected with the negative pole of a jth cell, j=m+1, m+2 ... m+n.
For serial power battery pack or bank of super capacitors, condition of work is identical, and the energy of energy storage monomer is directly proportional to energy storage monomer voltage.Principle of the present invention is that voltage the highest energy storage monomer is to voltage minimum energy storage monomer transferring energy, when the voltage difference of any two energy storage monomers exceedes restriction threshold value, regulate by controlling certain bidirectional switch pipe, voltage between energy storage monomer is reached unanimity, thus realizes the balancing energy between energy storage monomer.
Advantage of the present invention is, transformer has m+n winding, and front m energy storage monomer in series battery is first group, and rear n energy storage monomer is second group, have in m+n winding of transformer m coil respectively with the m in first group energy storage monomer one_to_one corresponding, in m+n winding of described transformer all the other n coil respectively with the n in second group energy storage monomer one_to_one corresponding, m with n can be identical, also can be different, m+n winding shares a magnetic core, and the number of turn is identical, circuit structure is simple, the direct bi-directional of point-to-point energy between any two energy storage monomers of multi-section serial battery group can be realized, no matter energy storage monomer sites to be equalized is adjacent or non-conterminous, can both be disposable complete by energy transferring, thus the energy transferring path of balancing procedure is short, balancing speed is fast, and the intermediate conversion of noenergy and conversion links, balancing procedure loss is little, equalization efficiency is improved, and equalization efficiency improves more than 30%.
Accompanying drawing explanation
Fig. 1 is the circuit connection diagram of the direct balancer of the many monomers of series battery described in embodiment one, wherein, and B
1to B
m+nrepresent the 1st to m+n energy storage monomer respectively; M
1to M
m+nrepresent the 1st to m+n bidirectional switch, L
1to L
m+n1st to m+n winding of indication transformer;
Fig. 2 is the circuit connection diagram of the direct balancer of the many monomers of series battery described in embodiment two;
When Fig. 3 is the transformer first winding energy storage in embodiment six, the direct balancer working state schematic representation of the many monomers of the series battery described in invention;
Fig. 4 is that the energy in transformer first winding in embodiment six transfers to the 6th energy storage monomers B by flux coupled through transformer the 6th winding
6time, the direct balancer working state schematic representation of the many monomers of the series battery described in invention;
Fig. 5 is in embodiment six, works as m=3, during n=3, with the first energy storage monomers B
1energy is the highest, the 3rd energy storage monomers B
3during minimum energy, the direct balancer of the many monomers of series battery of the present invention is in working state schematic representation during normal shock balanced mode in group;
Fig. 6 is in embodiment seven, works as m=3, and during n=3, magnetic is satisfied to prevent iron core from occurring, with the first energy storage monomers B in first group
1energy is the highest, the 3rd energy storage monomers B
35th energy storage monomers B in minimum energy and second group
5minimum energy is example, and the working state schematic representation of the direct balancer of the many monomers of series battery of the present invention is described.
Embodiment
Embodiment one: present embodiment is described see Fig. 1, the direct balancer of the many monomers of series battery described in present embodiment, described series battery forms by m+n energy storage is monomer series-connected, the direct balancer of described many monomers comprises transformer and m+n bidirectional switch, m and n is the positive integer being greater than 1;
Described transformer has m+n winding, and the number of turn of m+n winding is all identical;
Front m energy storage monomer in series battery is first group, and rear n energy storage monomer is second group;
Have in m+n winding of described transformer m coil respectively with the m in first group energy storage monomer one_to_one corresponding, in m+n winding of described transformer all the other n coil respectively with the n in second group energy storage monomer one_to_one corresponding,
I-th winding L
iwith i-th bidirectional switch with i-th energy storage is monomer series-connected is connected, and described i-th bidirectional switch is connected on positive pole and i-th winding L of i-th energy storage monomer
isame Name of Ends between, i=2 ... m;
A jth winding L
jwith a jth bidirectional switch with a jth energy storage is monomer series-connected is connected, and a described jth winding L
jsame Name of Ends be connected with the negative pole of a jth energy storage monomer, j=m+1, m+2 ... m+n.
Principle of the present invention is that voltage the highest energy storage monomer is to the minimum monomer transferring energy of voltage, when the voltage difference of any two energy storage monomers exceedes restriction threshold value, regulated by the bidirectional switch pipe controlling many monomer direct equalizers, voltage between energy storage monomer is reached unanimity, thus realizes the balancing energy between energy storage monomer.
Embodiment two: present embodiment is described see Fig. 2, the difference of present embodiment and the direct balancer of the many monomers of the series battery described in embodiment one is, described bidirectional switch is composed in series by the switching tube of two endobiosis diodes, and the source electrode of the switching tube of an endobiosis diode is connected with the source electrode of the switching tube of another endobiosis diode.
Embodiment three: present embodiment is described see Fig. 2, the difference of present embodiment and the direct balancer of the many monomers of the series battery described in embodiment two is, described endobiosis diode switch pipe is MOSFET.
Embodiment four: present embodiment is described see Fig. 1 and 2, the difference of present embodiment and the direct balancer of the many monomers of series battery described in embodiment one, two or three is, described n be greater than 2 and be less than 7 integer, m be greater than 2 and be less than 7 integer.
Embodiment five: present embodiment is described see Fig. 1 and 2, the difference of present embodiment and the direct balancer of the many monomers of the series battery described in embodiment four is, described n equals 3, and m equals 3.
Embodiment six: present embodiment is described see Fig. 1, the direct equalization methods of the many monomers of series battery is realized based on the direct balancer of the many monomers of series battery described in embodiment one, three or five, described method is: when group self-energy is balanced, adopts normal shock balanced operation mode; Between group during balancing energy, adopt flyback balanced operation mode.
In present embodiment, with m=3, n=3 for example, operating state when the direct balancer of the many monomers of series battery is in normal shock balanced mode in flyback balanced mode between group or group specifically see Fig. 3 to 5;
When the direct balancer of the many monomers of series battery is in flyback balanced mode between group, its working state schematic representation see Fig. 3 and Fig. 4, the first energy storage monomers B
1energy is the highest, the 6th energy storage monomers B
6minimum energy is that example illustrates,
Wherein, the first bidirectional switch M
1conducting, the first energy storage monomers B
1, the first bidirectional switch M
1loop is formed, by the first energy storage monomers B with the first winding L 1
1in unnecessary stored energy in the first winding L 1 of transformer, specifically see Fig. 3,
As the first bidirectional switch M
1turn off, the 6th bidirectional switch M
6open-minded, now the 6th energy storage monomers B
6, transformer the 6th winding L
6with the 6th bidirectional switch M
6form loop, the first winding L
1in energy by flux coupled through the 6th winding L
6transfer to the 6th energy storage monomers B
6in, specifically see Fig. 4.
When the direct balancer of the many monomers of series battery be in group in normal shock balanced mode time, its working state schematic representation see Fig. 5, with the first energy storage monomers B
1energy is the highest, the 3rd energy storage monomers B
3minimum energy is example explanation.Illustrate below in conjunction with Fig. 5, the first bidirectional switch M
1with the 3rd bidirectional switch M
3conducting simultaneously, and the first winding L of above-mentioned two bidirectional switchs and transformer
1with the tertiary winding L of transformer
3form forward conversion circuit.By the first energy storage monomers B
1in unnecessary energy by the first winding L of transformer
1the tertiary winding L of transformer is passed to through magnetic circuit
3, thus by the first energy storage monomers B
1energy trasfer to the 3rd energy storage monomers B
3in.
Embodiment seven: present embodiment is described see Fig. 1, the difference of present embodiment and the direct equalization methods of the many monomers of the series battery described in embodiment six is, when it works in the balanced operation mode of normal shock in group, between employing group, the balanced operation mode of flyback carries out magnetic reset, to prevent the magnetic core of unidirectional excitation saturated.
In present embodiment, with m=3, n=3 for example, between employing group, the working method of flyback carries out magnetic reset, with the first energy storage monomers B in first group
1energy is the highest, the 3rd energy storage monomers B
35th energy storage monomers B in minimum energy and second group
5minimum energy is that example illustrates, specifically see Fig. 6,
Make the first bidirectional switch M
1with the 3rd bidirectional switch M
3conducting simultaneously, and the first bidirectional switch M
1with the 3rd bidirectional switch M
3with the first winding L of transformer
1with the tertiary winding L of transformer
3form forward conversion circuit.By the first energy storage monomers B
1in unnecessary energy be passed to the tertiary winding L of transformer through magnetic circuit by the first winding L 1 of transformer
3, thus by the first energy storage monomers B
1energy trasfer to the 3rd energy storage monomers B
3in,
Then make the first bidirectional switch M then,
1with the 3rd bidirectional switch M
3turn off simultaneously, make the 5th bidirectional switch M
5conducting, now the 5th energy storage monomers B
5with the 5th winding L of transformer
5with the 5th bidirectional switch M
5form conducting loop, the residue magnetic energy in magnetic core is transferred to the 5th energy storage monomers B that voltage is relatively low
5in, thus realize iron core magnetic reset.
Claims (7)
1. the direct balancer of the many monomers of series battery, is characterized in that, described series battery forms by m+n energy storage is monomer series-connected, and the direct balancer of described many monomers comprises transformer and m+n bidirectional switch, m and n is the positive integer being greater than 1;
Described transformer has m+n winding, and the number of turn of m+n winding is all identical;
Front m energy storage monomer in series battery is first group, and rear n energy storage monomer is second group;
Have in m+n winding of described transformer m coil respectively with the m in first group energy storage monomer one_to_one corresponding, in m+n winding of described transformer all the other n coil respectively with the n in second group energy storage monomer one_to_one corresponding,
I-th winding L
iwith i-th bidirectional switch with i-th energy storage is monomer series-connected is connected, and described i-th bidirectional switch is connected on positive pole and i-th winding L of i-th energy storage monomer
isame Name of Ends between, i=1,2 ... m;
A jth winding L
jwith a jth bidirectional switch with a jth energy storage is monomer series-connected is connected, and a described jth winding L
jsame Name of Ends be connected with the negative pole of a jth energy storage monomer, j=m+1, m+2 ... m+n.
2. the direct balancer of the many monomers of series battery according to claim 1, it is characterized in that, described bidirectional switch is composed in series by the switching tube of two endobiosis diodes, and the source electrode of the switching tube of an endobiosis diode is connected with the source electrode of the switching tube of another endobiosis diode.
3. the direct balancer of the many monomers of series battery according to claim 2, is characterized in that, described endobiosis diode switch pipe is MOSFET.
4. the direct balancer of the many monomers of series battery according to claim 1,2 or 3, is characterized in that, described n be greater than 2 and be less than 7 integer, m be greater than 2 and be less than 7 integer.
5. the direct balancer of the many monomers of series battery according to claim 4, is characterized in that, described n equals 3, and m equals 3.
6. realize the directly balanced method of the many monomers of series battery based on the direct balancer of the many monomers of series battery described in claim 1,3 or 5, it is characterized in that, described method is: when group self-energy is balanced, adopts normal shock balanced operation mode; Between group during balancing energy, adopt flyback balanced operation mode.
7. method according to claim 6, is characterized in that, when working in the balanced operation mode of normal shock in group, between employing group, the balanced operation mode of flyback carries out magnetic reset, to prevent the magnetic core of unidirectional excitation saturated.
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| CN103986202B (en) * | 2014-03-31 | 2016-05-11 | 江苏省电力公司盐城供电公司 | A kind of electric motor car of electric weight intelligent equalization |
| CN106532802B (en) * | 2016-10-20 | 2018-07-06 | 哈尔滨工业大学 | The direct balancer of four monomer of series connection accumulation body and method |
| CN106532827B (en) * | 2016-11-24 | 2018-06-22 | 哈尔滨工业大学 | Series connection accumulation balancer and method with point-to-point path |
| CN106451686A (en) * | 2016-12-13 | 2017-02-22 | 东莞力朗电池科技有限公司 | Battery pack equalization circuit |
| CN108598604A (en) * | 2018-05-09 | 2018-09-28 | 哈尔滨工业大学 | Flyback mode series connection accumulation equalizing circuit |
| CN108565923A (en) * | 2018-05-09 | 2018-09-21 | 哈尔滨工业大学 | Series connection accumulation equalizing circuit with flexible path |
| CN108521156A (en) * | 2018-05-09 | 2018-09-11 | 哈尔滨工业大学 | Series connection accumulation multi-mode equalizing circuit based on BuckBoost transformation |
| CN110203106A (en) * | 2019-05-10 | 2019-09-06 | 杭州电子科技大学 | A kind of active mixed equilibrium circuit applied to power battery |
| CN110126675A (en) * | 2019-05-10 | 2019-08-16 | 杭州电子科技大学 | A kind of passive mating type mixed equilibrium circuit of master applied to power battery |
| CN115765122B (en) * | 2023-02-13 | 2023-05-26 | 杭州协能科技股份有限公司 | Basic equalization unit, active equalization topological structure of battery pack and active equalization topological method of battery pack |
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| CN101567574A (en) * | 2009-06-03 | 2009-10-28 | 王创社 | Proportional balancing method for voltage of energy storage device and circuit |
| CN102222957B (en) * | 2011-06-21 | 2013-10-09 | 清华大学深圳研究生院 | Automatic battery capacity equalization circuit and implementing method thereof |
| JP2013162661A (en) * | 2012-02-07 | 2013-08-19 | Toyota Industries Corp | Battery equalization device and method capable of charging auxiliary battery |
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