CN108521156A - Series connection accumulation multi-mode equalizing circuit based on BuckBoost transformation - Google Patents
Series connection accumulation multi-mode equalizing circuit based on BuckBoost transformation Download PDFInfo
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- CN108521156A CN108521156A CN201810436419.XA CN201810436419A CN108521156A CN 108521156 A CN108521156 A CN 108521156A CN 201810436419 A CN201810436419 A CN 201810436419A CN 108521156 A CN108521156 A CN 108521156A
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- monomer
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- way switch
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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
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- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The present invention relates to a kind of series connection accumulation multi-mode equalizing circuits based on BuckBoost transformation, belong to power electronics field.When series connection accumulation amount of monomer is n, including 1 inductance of n, n switching tube, 2 two-way switch of 2n.Utilize 2 two-way switch of 2n, 1 inductance of n can be controlled and be in one of open circuit, short circuit, three kinds of states of access, it is used cooperatively n switching tube again, it can make the group and other monomers adjacent thereto or group that monomer or adjacent monomer are constituted, and BuckBoost converters are constituted in access state inductance, realize the transmission of balanced energy.In the case where inductance quantity is constant, HF switch pipe quantity is reduced, only increases some low frequency two-way switch, realizes more more flexible than traditional BuckBoost equalizing circuits, diversified equalization function, balancing speed and equalization efficiency can be improved.
Description
Technical field
The present invention relates to a kind of series connection accumulation multi-mode equalizing circuits based on BuckBoost transformation, belong to power electronics
Technical field.
Background technology
The series connection accumulation group constituted with the energy storage monomer such as various batteries or ultracapacitor is in electric vehicle, generation of electricity by new energy
Equal fields are widely used.Since there are inevitable differences between energy storage monomer, during being used in series, easily there is some
Or certain monomers are overcharged or are crossed and put, if not carrying out balancing energy to energy storage group, actual capacity can be caused to decline, service life
The problems such as reduction, therefore the balancing energy between storage bodies is always one of the key technology of series connection accumulation practical application.
In general, the energy of storage bodies and its voltage degree of correlation are high, therefore often through release voltage compared with high monomer
Energy supplements the energy of the relatively low monomer of voltage to realize balancing energy.With the nothing by resistance consumption voltage compared with high monomer energy
Source balanced way is compared, more favourable in such a way that converter transmits the active equalization of energy.It is big absolutely in active equalization mode
Part is all that energy is transmitted between monomer using inductance or coupling inductance as intermediate energy storage link, can be divided into following several
Basic mode.
First, flying over inductively, inductance both ends are connected with the positive and negative electrode of each monomer by two-way switch, every in this way
A monomer can by with inductance positive energy exchange, achieve the purpose that carry out between arbitrary monomer directly balanced.This method needs
A large amount of two-way switch is wanted, two switching tubes in two-way switch are also required to different drive signals, additionally due to switching
It is needed there are dead time when action, inductive current does not have free wheeling path that can form larger due to voltage spikes.
Second is that BuckBoost converter modes, are formed with two adjacent monomers, two switching tubes and an inductance
BuckBoost converters are, it can be achieved that balancing energy between adjacent monomer.BuckBoost is arranged between each two adjacent monomer to become
Parallel operation transmits the balancing energy, it can be achieved that whole group successively by energy between adjacent monomer.This method control is simple, but not
Adjacent monomer cannot directly carry out balancing energy, therefore balancing speed is slower.
Third, flyback converter mode, series connection accumulation is connected by the primary side winding of multi output winding transformer through two-way switch
Group, each vice-side winding connects each monomer through two-way switch respectively can make although cannot directly carry out energy transmission between each monomer
Voltage transmits energy compared with high monomer to whole group, and the lower monomer of voltage can obtain energy from whole group, due to entire series connection accumulation
Group is used as middle transition link, therefore equalization efficiency is not high.
Based on above-mentioned three kinds of modes, there has been proposed many equalization methods, such as in flying over inductively, utilize
Coupling inductance replaces inductance, and switching tube quantity is made to substantially reduce；It, will be in each converter in BuckBoost converter modes
Inductive coupling together, can across monomer transmission energy；In flyback converter mode, change the of the same name of a part of coupling inductance
End, realizes the direct equilibrium between partial monosomy.The above method improves portfolio effect, but still there are some common problems,
First, the cost paid is larger, increasing for switching tube and its driving quantity causes structure and control complicated；Second is that equilibrium path is not
It is enough flexible, substantially it is also limited to the energy transmission between monomer or between monomer and whole group.
Invention content
The inflexible disadvantage of working method that the present invention overcomes existing equalizing circuits when realizing monomer balancing energy, and
Multiple balancing procedures may be implemented and be carried out at the same time work, have the characteristics that balanced way is flexible and changeable, balancing speed is fast, the present invention
Provide a kind of series connection accumulation multi-mode equalizing circuit converted based on BuckBoost.
Series connection accumulation multi-mode equalizing circuit of the present invention based on BuckBoost transformation, is suitable for various types
Battery and ultracapacitor.
Series connection accumulation multi-mode equalizing circuit of the present invention based on BuckBoost transformation, for n series connection accumulation
Monomer B1、B2……Bn, by n-1 inductance L1、L2……Ln-1, n switching tube S1、S2……Sn, 2n-2 two-way switch Q1、
Q1a、Q2、Q2a……Qn-1、Q(n-1)aComposition；B1、B2……BnIt is sequentially connected in series, B1Cathode and B2Anode be connected, and so on,
Bn-1Cathode and BnAnode be connected, S1、S2……SnIt is sequentially connected in series, S1Drain electrode and B1Anode be connected, S1Source electrode and S2
Drain electrode be connected, and so on, Sn-1Source electrode and SnDrain electrode be connected, SnSource electrode and BnCathode be connected, inductance L1With it is double
To switch Q1The branch connected and formed is connected to B1Cathode and S1Source electrode between, two-way switch Q1aIt is connected to B1Cathode
With S1Source electrode between, and so on, inductance Ln-1With two-way switch Qn-1The branch connected and formed is connected to Bn-1Cathode with
Sn-1Source electrode between, two-way switch Q(n-1)aIt is connected to Bn-1Cathode and Sn-1Source electrode between.
Series connection accumulation multi-mode equalizing circuit of the present invention based on BuckBoost transformation, traditional
On the basis of BuckBoost equalizing circuits, in the case where not increasing inductance quantity, it is equal that original method adjacent monomer not only may be implemented
Weigh function, can also realize the equalization function between the group constituted with several adjacent monomers.Utilize 2n-2 two-way switch Q1、
Q1a、Q2、Q2a……Qn-1、Q(n-1)a, control n-1 inductance L1、L2……Ln-1, it is allowed in three kinds of open circuit, short circuit, access shapes
A kind of state in state is used cooperatively n switching tube S1、S2……Sn, the group that makes monomer or adjacent monomer constitute and other with
Adjacent monomer or group, and inductance in access state constitutes BuckBoost converters, realizes the biography of balanced energy
It passs.
As traditional BuckBoost equalizing circuits, when constituting multiple BuckBoost converters being independent of each other,
These BuckBoost converters are simultaneously operable, that is, are carried out at the same time balancing energy.When monomer or the inductance at group both ends are all to connect
When entering state, the energy of the monomer or group can be discharged to its both sides monomer adjacent thereto or group simultaneously.N switching tube
S1、S2……SnSwitching frequency it is identical as BuckBoost converter frequencies, work in high frequency state.2n-2 two-way switch
Q1、Q1a、Q2、Q2a……Qn-1、Q(n-1)aThe state for only controlling corresponding inductance is driven during BuckBoost converters work
Dynamic signal is constant, that is, works in low frequency state, therefore two-way switch is in addition to it may be used MOSFET or IGBT, can also use after
Electric appliance.
Advantageous effect
The beneficial effects of the present invention are inductance quantity is constant, HF switch pipe quantity is reduced, only increases some low frequencies
In the case of two-way switch, the adjacent monomer equalization function of traditional BuckBoost equalizing circuits is not only realized, is more realized
Balancing energy between group and group and group that monomer and several adjacent monomers are constituted, this more flexible equilibrium
Mode can improve balancing speed and equalization efficiency.
Description of the drawings
Fig. 1 is the principle schematic based on the BuckBoost series connection accumulation multi-mode equalizing circuits converted；
Fig. 2 is specific implementation mode one, and monomer and monomer carry out the schematic diagram of balancing energy, by taking 5 energy storage monomers as an example；
Fig. 3 is specific implementation mode two, and monomer and group carry out the schematic diagram of balancing energy, by taking 5 energy storage monomers as an example；
Fig. 4 is specific implementation mode three, and group and group carry out the schematic diagram of balancing energy, by taking 5 energy storage monomers as an example；
Fig. 5 is specific implementation mode four, and monomer or group carry out equilibrium to its both sides adjacent monomer or group simultaneously and show
It is intended to, by taking 5 energy storage monomers as an example；
Specific implementation mode
Specific implementation mode one：
Adjacent energy storage monomer carries out balancing energy, in conjunction with Fig. 2, when with energy storage monomer being 5, and monomer B1With B2Progress equilibrium,
Monomer B4And B5Illustrate in case of progress is balanced, unmentioned switching tube and two-way switch are in off state.
Energy storage monomer B1、B2, switching tube S1、S2, inductance L1With two-way switch Q1、Q2aBuckBoost converters are constituted, it is two-way
Switch Q1、Q2aIt is constantly in conducting state.Work as S1Conducting, S2When shutdown, B1To inductance L1Carry out energy storage, S1When shutdown, L1Energy
Amount passes through S2Pass to B2, similarly, control switching tube S2Turn-on and turn-off can be by B2Energy transmission to B1, that is, realize list
Body B1With B2Between balancing energy.Similarly, energy storage monomer B4、B5, switching tube S4、S5, inductance L4With two-way switch Q3a、Q4It constitutes
BuckBoost converters are, it can be achieved that monomer B4、B5Balancing energy.Moreover, because above-mentioned two BuckBoost converters are mutually not
It influences, two balancing procedures can be carried out at the same time.
Specific implementation mode two：
Energy storage monomer and adjacent group carry out balancing energy, in conjunction with Fig. 3, when with energy storage monomer being 5, and monomer B1With monomer
B2、B3、B4、B5Illustrate in case of group's progress equilibrium of composition, unmentioned switching tube and two-way switch are in pass
Disconnected state.
Energy storage monomer B1、B2、B3、B4、B5, switching tube S1、S2、S3、S4、S5, inductance L1With two-way switch Q1It constitutes
BuckBoost converters, two-way switch Q1It is constantly in conducting state.Work as S1Conducting, S2、S3、S4、S5When shutdown, B1To inductance L1
Carry out energy storage, S1When shutdown, L1Energy pass through S2、S3、S4、S5It passes to by B2、B3、B4、B5The energy storage group of composition, similarly,
Control switching tube S simultaneously2、S3、S4、S5Turn-on and turn-off can be by B2、B3、B4、B5The energy transmission of the energy storage group of composition is given
B1, that is, realize monomer B1With monomer B2、B3、B4、B5The balancing energy of the energy storage group of composition.
Specific implementation mode three：
Adjacent energy storage group carries out balancing energy, in conjunction with Fig. 4, when with energy storage monomer being 5, and monomer B2、B3The energy storage of composition
Group and monomer B4、B5Illustrate in case of the energy storage group progress equilibrium of composition, unmentioned switching tube and two-way switch
It is in off state.
Energy storage monomer B2、B3、B4、B5, switching tube S2、S3、S4、S5, inductance L3With two-way switch Q1a、Q3Constitute BuckBoost
Converter, two-way switch Q1a、Q3It is constantly in conducting state.Work as S2、S3Conducting, S4、S5When shutdown, B2、B3The energy storage of composition is small
Group is to inductance L3Carry out energy storage, S2、S3When shutdown, L3Energy pass through S4、S5It passes to by B4、B5The energy storage group of composition, together
Reason, control switching tube S4、S5Turn-on and turn-off can be by B4、B5The energy transmission of the energy storage group of composition is to B2、B3Composition
Energy storage group realizes monomer B2、B3The energy storage group of composition and monomer B4、B5The balancing energy of the energy storage group of composition.
Specific implementation mode four：
Monomer or group carry out equilibrium to its both sides adjacent monomer or group simultaneously, in conjunction with Fig. 5, with energy storage monomer for 5
When, monomer B2、B3The energy storage group of composition is simultaneously to the monomer B of its both sides1With monomer B4、B5The energy storage group of composition carries out balanced
In case of illustrate, unmentioned switching tube and two-way switch be in off state.
Energy storage monomer B1、B2、B3、B4、B5, switching tube S1、S2、S3、S4、S5, inductance L1、L3With two-way switch Q1、Q3Constitute two
The combining form of a similar BuckBoost converters, two-way switch Q1、Q3It is constantly in conducting state.Work as S2、S3Conducting, S1、
S4、S5When shutdown, B2、B3The energy storage group of composition is to inductance L1、L3Carry out energy storage, current direction as shown by the solid line in the drawings, S2、S3
When shutdown, L1Energy pass through S1Pass to B1, L3Energy pass through S4、S5It passes to by B4、B5The energy storage group of composition, electric current
Direction is as shown in phantom in FIG., realizes group simultaneously to the balancing energy of its both sides adjacent monomer or group.
Claims (8)
1. the series connection accumulation multi-mode equalizing circuit based on BuckBoost transformation, which is characterized in that for n series connection accumulation list
Body B1、B2……Bn, by n-1 inductance L1、L2……Ln-1, n switching tube S1、S2……Sn, 2n-2 two-way switch Q1、
Q1a、Q2、Q2a……Qn-1、Q(n-1)aComposition；B1、B2……BnIt is sequentially connected in series, B1Cathode and B2Anode be connected, and so on,
Bn-1Cathode and BnAnode be connected, S1、S2……SnIt is sequentially connected in series, S1Drain electrode and B1Anode be connected, S1Source electrode and S2
Drain electrode be connected, and so on, Sn-1Source electrode and SnDrain electrode be connected, SnSource electrode and BnCathode be connected, inductance L1With it is double
To switch Q1The branch connected and formed is connected to B1Cathode and S1Source electrode between, two-way switch Q1aIt is connected to B1Cathode
With S1Source electrode between, and so on, inductance Ln-1With two-way switch Qn-1The branch connected and formed is connected to Bn-1Cathode with
Sn-1Source electrode between, two-way switch Q(n-1)aIt is connected to Bn-1Cathode and Sn-1Source electrode between.
2. the series connection accumulation multi-mode equalizing circuit according to claim 1 based on BuckBoost transformation, feature exist
In series connection accumulation monomer is various types battery or ultracapacitor.
3. the series connection accumulation multi-mode equalizing circuit according to claim 1 based on BuckBoost transformation, feature exist
In for two-way switch by being constituted using 2 common source switching tubes of identical drive signals, switching tube uses MOSFET or IGBT.
4. the series connection accumulation multi-mode equalizing circuit according to claim 1 based on BuckBoost transformation, feature exist
In two-way switch can be relay.
5. the method for realizing series connection accumulation balancing energy based on equalizing circuit described in claim 1, which is characterized in that utilize
2n-2 two-way switch Q1、Q1a、Q2、Q2a……Qn-1、Q(n-1)a, control n-1 inductance L1、L2……Ln-1, be allowed in open circuit,
A kind of state in three kinds of short circuit, access states, is used cooperatively n switching tube S1、S2……Sn, make monomer or adjacent monomer structure
At group and other monomers adjacent thereto or group, and inductance in access state constitutes BuckBoost converters,
Realize the transmission of balanced energy.
6. series connection accumulation balancing energy method according to claim 5, which is characterized in that when constituting multiple be independent of each other
BuckBoost converters, these BuckBoost converters are simultaneously operable.
7. series connection accumulation balancing energy method according to claim 5, which is characterized in that when monomer or the electricity at group both ends
When sense is all access state, the energy of the monomer or group can be discharged to its both sides monomer adjacent thereto or group simultaneously.
8. series connection accumulation balancing energy method according to claim 5, which is characterized in that n switching tube S1、S2……Sn
Switching frequency it is identical as BuckBoost converter frequencies, work in high frequency state, BuckBoost converters work during,
2n-2 two-way switch Q1、Q1a、Q2、Q2a……Qn-1、Q(n-1)aDrive signal it is constant, that is, work in low frequency state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810436419.XA CN108521156A (en) | 2018-05-09 | 2018-05-09 | Series connection accumulation multi-mode equalizing circuit based on BuckBoost transformation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810436419.XA CN108521156A (en) | 2018-05-09 | 2018-05-09 | Series connection accumulation multi-mode equalizing circuit based on BuckBoost transformation |
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| CN108521156A true CN108521156A (en) | 2018-09-11 |
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| CN201810436419.XA Pending CN108521156A (en) | 2018-05-09 | 2018-05-09 | Series connection accumulation multi-mode equalizing circuit based on BuckBoost transformation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638923A (en) * | 2019-01-17 | 2019-04-16 | 哈尔滨工业大学 | Mixed mode battery equalizing circuit |
| CN113612277A (en) * | 2021-07-30 | 2021-11-05 | 阳光电源股份有限公司 | Battery unit and control method thereof |
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| CN105978052A (en) * | 2016-01-19 | 2016-09-28 | 合肥工业大学 | Novel battery pack equalization circuit based on Buck-boost |
| CN106532827A (en) * | 2016-11-24 | 2017-03-22 | 哈尔滨工业大学 | Series energy storage balance apparatus and method with point-to-point path |
| CN106532802A (en) * | 2016-10-20 | 2017-03-22 | 哈尔滨工业大学 | Four-single-body direct balancing device and method of series energy storage body |
| CN106786880A (en) * | 2016-12-21 | 2017-05-31 | 华南理工大学 | A kind of Novel layered equalizing circuit |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103618360A (en) * | 2013-12-05 | 2014-03-05 | 哈尔滨工业大学 | Multi-monomer directly equalizing device and method of series battery pack |
| CN105978052A (en) * | 2016-01-19 | 2016-09-28 | 合肥工业大学 | Novel battery pack equalization circuit based on Buck-boost |
| CN106532802A (en) * | 2016-10-20 | 2017-03-22 | 哈尔滨工业大学 | Four-single-body direct balancing device and method of series energy storage body |
| CN106532827A (en) * | 2016-11-24 | 2017-03-22 | 哈尔滨工业大学 | Series energy storage balance apparatus and method with point-to-point path |
| CN106786880A (en) * | 2016-12-21 | 2017-05-31 | 华南理工大学 | A kind of Novel layered equalizing circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638923A (en) * | 2019-01-17 | 2019-04-16 | 哈尔滨工业大学 | Mixed mode battery equalizing circuit |
| CN113612277A (en) * | 2021-07-30 | 2021-11-05 | 阳光电源股份有限公司 | Battery unit and control method thereof |
| CN113612277B (en) * | 2021-07-30 | 2024-02-09 | 阳光电源股份有限公司 | Battery unit and control method thereof |
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