CN104184192B - A kind of charging/discharging active equalization circuit for lithium ion power battery pack - Google Patents
A kind of charging/discharging active equalization circuit for lithium ion power battery pack Download PDFInfo
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- CN104184192B CN104184192B CN201410422054.7A CN201410422054A CN104184192B CN 104184192 B CN104184192 B CN 104184192B CN 201410422054 A CN201410422054 A CN 201410422054A CN 104184192 B CN104184192 B CN 104184192B
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The invention provides a kind of lithium-ion-power cell discharge and recharge active equalization circuit, each battery bag of power battery pack is provided with voltage acquisition module and voltage balance circuit；The voltage of each battery cell of voltage acquisition module Real-time Collection is sent to battery management system, carries out electric voltage equalization when the voltage of battery cell, battery bag or power battery pack exceedes the bound of setting；Voltage balance circuit includes transformator and equalizer switch metal-oxide-semiconductor, in each battery cell in power bag, power battery pack, each battery bag and whole power battery pack are connected on a winding of same core transformer by two equalizer switch metal-oxide-semiconductors respectively, by controlling the break-make of equalizer switch metal-oxide-semiconductor, it is coupled out corresponding equalizing voltage on the transformer, it is achieved discharge and recharge.The active equalization process flexible of the present invention, quickly, efficiently, can effectively manage battery charging condition, improve the service efficiency of set of cells, extend battery life, and balanced way is flexible, and the suitability is strong.
Description
Technical field
The invention belongs to battery charging and discharging technical field, be specifically related to a kind of lithium-ion-power cell group discharge and recharge the most all
Weighing apparatus circuit.
Background technology
Modern electric automobile many employings tandem power battery pack, lithium-ion-power cell will be within following a period of time
A large amount of uses.The safe efficient use of electrokinetic cell has great importance for the properly functioning of electric automobile.
Monomer in set of cells is due to reasons such as the techniques in manufacturing process, it is difficult to ensure that all of monomer has very well
Concordance, therefore there is difference between cell, even the battery of same batch, same model, there is also capacity, internal resistance
Etc. the difference of aspect.After continuous print charge and discharge cycles, the discordance of this monomer can be aggravated, some monomer electricity will be made
The capacity in pond accelerates decay, and during long-term use, this species diversity can be increasing, and then causes power battery pack
Unbalanced during discharge and recharge.Lack of uniformity is the biggest to the performance impact of series battery, it will reduce the whole volume of set of cells,
Reduce the overall service efficiency of set of cells, shorten set of cells service life.
Summary of the invention
For unbalanced problem during power battery pack discharge and recharge present in prior art, the present invention provide a kind of lithium from
Sub-electrokinetic cell discharge and recharge active equalization circuit, as a part for vehicle mounted dynamic battery Battery pack management system, is to existing
Actively a kind of of cell Equalization Methods for Charge improves and perfect.
Power battery pack is in series by some battery cells, and multiple battery cells are composed in series battery bag, one or many
Individual battery bag is composed in series power battery pack.A kind of lithium-ion-power cell discharge and recharge active equalization circuit that the present invention provides,
It is both provided with voltage acquisition module and voltage balance circuit for each battery bag in power battery pack.
Voltage acquisition module is connected with each battery cell in battery bag, for the electricity of each battery cell of Real-time Collection
Pressure, is sent to battery management system by the voltage data collected.Voltage balance circuit includes that equalizer transformer and equilibrium are opened
Closing metal-oxide-semiconductor, equalizer transformer is the same core transformer of a Multiple coil.
In power battery pack in the voltage balance circuit of battery bag a, each battery cell in battery bag a, whole dynamic
Each battery bag and whole power battery pack in power set of cells are connected to same core by two equalizer switch metal-oxide-semiconductors respectively and become
On one winding of depressor, the coupling being realized energy by the transformator of same core is exchanged.Battery management system is corresponding by controlling
The break-make of equalizer switch metal-oxide-semiconductor, is coupled out corresponding equalizing voltage on the transformer, it is achieved to battery cell, battery bag and dynamic
The active equalization of power battery set charge/discharge.
Voltage balance circuit includes battery cell voltage balance circuit E, battery bag voltage balance circuit F and power battery pack
Voltage balance circuit H.For the battery bag a in power battery pack, in battery bag a, each battery cell is all connected with a battery list
Bulk voltage equalizing circuit E.Each battery bag in power battery pack is all connected with a battery bag voltage balance circuit F.Whole dynamic
Power set of cells connects a power battery voltage equalizing circuit H.Transformer coupled by with core of each equalizing circuit E, F and H.
All of equalizer switch metal-oxide-semiconductor is all controlled by battery management system, and battery management system is by controlling corresponding equalizer switch
The break-make of metal-oxide-semiconductor selects and balancing battery monomer, battery bag and power battery pack.
The input of equalizing circuit E, F or H is corresponding battery cell, battery bag or the positive and negative polarities of power battery pack,
Outfan is the wire loop of corresponding Transformer Winding.Equalizing circuit E, F and H include the first equalizer switch metal-oxide-semiconductor, second equal
Weighing apparatus switch metal-oxide-semiconductor and the Transformer Winding of correspondence.First equalizer switch metal-oxide-semiconductor and the second equalizer switch metal-oxide-semiconductor, be arranged in series
Optional position between corresponding equalizing circuit E, F or H input and outfan.When battery cell, battery bag or electrokinetic cell
When group is discharged, control the conducting of the first equalizer switch metal-oxide-semiconductor and make positive pole and the conducting of corresponding Transformer Winding, control the
The turn-on and turn-off time of two equalizer switch metal-oxide-semiconductors so that produce alternating voltage in corresponding Transformer Winding.Alternating voltage warp
Transformator is changed, and produces euqalizing current, it is provided that be charged to the battery cell, battery bag or the power battery pack that need charging.
When battery cell, battery bag or power battery pack are charged, control the first equalizer switch metal-oxide-semiconductor and the second equalizer switch
The break-make of metal-oxide-semiconductor so that transformer-coupled euqalizing current arrives positive pole, and reverse electric current is blocked.
Described equalizer switch metal-oxide-semiconductor uses the combination of any one device following or any two kinds of devices to realize:
NMOS tube, PMOS, DUAL NMOS tube, DUAL PMOS.
The present invention is that voltage balance circuit provides a kind of specific implementation, as follows:
Battery cell voltage balance circuit E includes: electric capacity E, metal-oxide-semiconductor EA, diode EA, metal-oxide-semiconductor EB, diode EB and
The primary coil E of transformator.Battery bag voltage balance circuit F includes: electric capacity F, metal-oxide-semiconductor FA, diode FA, metal-oxide-semiconductor FB, two poles
The secondary coil F of pipe FB and transformator.Power battery voltage equalizing circuit H includes: electric capacity H, metal-oxide-semiconductor HA, diode HA,
The secondary coil F of metal-oxide-semiconductor HB, diode HB and transformator.The positive and negative polarities of described battery cell are defeated as equalizing circuit E's
Entering end, in sequential series between this equalizing circuit E input have metal-oxide-semiconductor EA and the parallel circuit of diode EA, the primary of transformator
Also it is parallel with at the beginning of electric capacity E, transformator between coil, metal-oxide-semiconductor EB and the parallel circuit of diode EB, and this circuit E input
Level coil E is as the outfan of circuit E.The positive and negative polarities of described battery bag are as the input of equalizing circuit F, this equalizing circuit
In sequential series between F input have metal-oxide-semiconductor FA and the parallel circuit of diode FA, the secondary coil F of transformator and metal-oxide-semiconductor
Electric capacity F also it is parallel with, the secondary coil F of transformator between FB and the parallel circuit of diode FB, and this equalizing circuit F input
Outfan as circuit F.The positive and negative polarities of described power battery pack are as the input of equalizing circuit H, and H is defeated for this equalizing circuit
Enter between end in sequential series have metal-oxide-semiconductor HA and the parallel circuit of diode HA, the secondary coil H and metal-oxide-semiconductor HB of transformator and
Electric capacity H also it is parallel with, the secondary coil H conduct of transformator between the parallel circuit of diode HB, and this equalizing circuit H input
The outfan of equalizing circuit H.A pair metal-oxide-semiconductor in parallel and diode composition NMOS tube, the source electrode of metal-oxide-semiconductor connects corresponding input
End, the drain electrode of metal-oxide-semiconductor connects corresponding outfan.
The lithium-ion-power cell discharge and recharge active equalization circuit of the present invention, it is achieved that 5 kinds of mode of operations: battery cell with
Double between bidirectional equalization, battery cell and battery bag between bidirectional equalization, battery bag and battery bag between battery cell
To equilibrium, the bidirectional equalization between battery cell and power battery pack, the bidirectional equalization between battery bag and power battery pack.
The lithium-ion-power cell discharge and recharge active equalization circuit of the present invention, its advantage and having the active effect that
1. the lithium-ion-power cell discharge and recharge active equalization circuit that the present invention provides both can realize multiple battery cell
While charge balancing, it is also possible to realize multiple battery cell simultaneously equalization discharge, it is also possible to realizing multiple battery cell has and fill
Having the equilibrium put, balanced way is very flexible, makes the efficiency of equilibrium be greatly improved；
2. the lithium-ion-power cell discharge and recharge active equalization circuit that the present invention provides can utilize battery cell, battery
Bag, set of cells mutually equalizes, it is possible to realize the double of multiple combination mode between battery cell, battery bag, power battery pack
To active equalization, including: between battery cell and battery cell, between battery bag and battery bag, battery cell and battery bag it
Between, active equalization between battery cell and set of cells, between battery bag and battery cell, balanced way is flexible and changeable, is suitable for
Property is strong；
3. the lithium-ion-power cell discharge and recharge active equalization circuit that the present invention provides uses with voltage sampling circuit (i.e. originally
The voltage acquisition module of invention) in parallel connected mode, the size of such euqalizing current would not have influence on battery cell voltage
Sampling precision；The most also having the advantage that euqalizing current is big, euqalizing current can reach 5A-20A, makes the efficiency of balancing procedure
Being greatly improved, the size of euqalizing current depends on the design of transformator；
4. the present invention provide lithium-ion-power cell discharge and recharge active equalization circuit only by control metal-oxide-semiconductor conducting and
Turning off the active equalization that just can realize under multiple-working mode, balancing procedure is safe and reliable, easily controllable；
5. the active equalization process of the lithium-ion-power cell discharge and recharge active equalization circuit that the present invention provides is quick, high
Effect, it is possible to effectively manage battery charging condition, improves the service efficiency of set of cells, and then extends battery life.
Accompanying drawing explanation
Fig. 1 is the structural representation of the charging/discharging active equalization circuit for lithium ion power battery pack that the present invention provides；
Fig. 2 is the equivalent circuit of bidirectional equalization between equalizing circuit mode of operation battery cell of the present invention and battery cell
Figure；
Fig. 3 is the equivalent circuit diagram of bidirectional equalization between equalizing circuit mode of operation battery bag of the present invention and battery bag；
Fig. 4 is the equivalent circuit of bidirectional equalization between equalizing circuit mode of operation battery cell of the present invention and battery bag
Figure；
Fig. 5 is the equivalent electric of bidirectional equalization between equalizing circuit mode of operation battery cell of the present invention and power battery pack
Lu Tu；
Fig. 6 is the equivalent circuit of bidirectional equalization between equalizing circuit mode of operation battery bag of the present invention and power battery pack
Figure.
In figure:
1-voltage acquisition module；2-power battery pack；3-voltage balance circuit 4-battery bag；
5-battery cell；6-transformator；7-battery cell voltage balance circuit E；
8-battery bag voltage balance circuit F；9-power battery voltage equalizing circuit H；
10-electric capacity E；11-MOS pipe EA；12-diode EA；13-MOS pipe EB；
14-diode EB；15-MOS pipe FA；16-diode FA；17-MOS pipe FB；
18-diode FB；19-MOS pipe HA；20-diode HA；21-MOS pipe HB；
22-diode HB；23-electric capacity F 24-electric capacity H
Detailed description of the invention
Below in conjunction with the accompanying drawings technical scheme is described in detail.
The lithium-ion-power cell discharge and recharge active equalization circuit that the present invention provides, can realize all battery cells simultaneously
Between discharge and recharge bidirectional equalization, it is possible to (size of euqalizing current depends on equalizer transformer to realize bigger euqalizing current
Design), it is possible to realize between battery cell and monomer, between battery cell and battery bag, between battery cell and set of cells, electricity
The bi-directional energy flow of multiple-working mode between Chi Bao and battery bag and between battery bag and set of cells so that active equalization
Process is quickly, efficiently, it is possible to effectively manages battery charging condition, and then the service efficiency of raising set of cells, extends the battery longevity
Life.
Power battery pack 2 is in series by some battery cells 5, and multiple battery cells 5 is composed in series a battery bag
4, one or more battery bags 4 are composed in series power battery pack 2.For each battery bag 4 in power battery pack 2, all arrange
One lithium-ion-power cell discharge and recharge active equalization circuit as shown in Figure 1, specifically includes that voltage acquisition module 1 and voltage
Equalizing circuit 3.
Voltage acquisition module 1 is connected with each battery cell in battery bag 4, for each battery cell of Real-time Collection
The voltage of 5, is sent to battery management system by the voltage data collected.Voltage balance circuit 3 include equalizer transformer and
Equalizer switch metal-oxide-semiconductor, equalizer transformer is the same core transformer 6 of a Multiple coil.Voltage balance circuit 3 is for electrokinetic cell
Battery cell 5 in group, battery bag 4, power battery pack 2 carry out charge and discharge control, it is achieved voltage balance management.Voltage acquisition mould
Block 1 and voltage balance circuit 3 are connected with the module controlling battery bag 4 in battery management system.Voltage acquisition module 1 connects battery
The input of respective modules in management system is corresponding during in voltage balance circuit 3, equalizer switch metal-oxide-semiconductor connects battery management system
The outfan of module.Each equalizer switch metal-oxide-semiconductor is controlled by battery management system.
If power battery pack 2 comprises N number of battery bag 4, b is labeled as the i-th battery bag 4 thereini, then at battery bag
biVoltage balance circuit 3 in, battery bag biIn each battery cell 5, each battery bag b in power battery pack 2j(j=
1,2 ..., N) and whole power battery pack 2, be connected to that transformator is corresponding by two equalizer switch metal-oxide-semiconductors respectively one
On winding, the coupling being realized energy by the transformator 6 of same core is exchanged.Battery management system is by controlling corresponding equalizer switch
The break-make of metal-oxide-semiconductor, is coupled out corresponding equalizing voltage on transformator 6, to battery cell 5, battery bag 4 and power battery pack 2
Discharge and recharge carry out active equalization.Specifically, each voltage balance circuit all includes connecting the first equalizer switch metal-oxide-semiconductor, second equal
Weighing apparatus switch metal-oxide-semiconductor and the Transformer Winding of correspondence.When battery cell, battery bag or power battery pack are discharged, control
The break-make of the first equalizer switch metal-oxide-semiconductor makes positive pole turn on corresponding Transformer Winding, controls the second equalizer switch metal-oxide-semiconductor
The turn-on and turn-off time so that produce alternating voltage in corresponding Transformer Winding.Alternating voltage is changed through transformator, produces all
Weighing apparatus electric current is supplied to need battery cell, battery bag or the power battery pack of charging to be charged.When battery cell, battery bag or
When power battery pack is charged, control the first equalizer switch metal-oxide-semiconductor and the break-make of the second equalizer switch metal-oxide-semiconductor so that transformation
The euqalizing current of device coupling arrives positive pole, and reverse electric current is blocked.
Described equalizer switch metal-oxide-semiconductor can use the combination of any one device following or random devices to realize:
NMOS tube, PMOS, DUAL NMOS tube, DUAL PMOS.As it is shown in figure 1, equalizer switch metal-oxide-semiconductor is equal in the embodiment of the present invention
For NMOS tube.
Described equalizer switch metal-oxide-semiconductor, can be placed on the battery cell of residing equalizing circuit, battery bag or electrokinetic cell
Optional position between both positive and negative polarity and the Transformer Winding coil of group.Such as, the first equalizer switch metal-oxide-semiconductor is arranged on positive pole and change
Between depressor winding, the second equalizer switch metal-oxide-semiconductor is arranged between negative pole and Transformer Winding；First equalizer switch metal-oxide-semiconductor and
Second equalizer switch metal-oxide-semiconductor is arranged between positive pole and Transformer Winding；First equalizer switch metal-oxide-semiconductor and the second equalizer switch
Metal-oxide-semiconductor is arranged between negative pole and Transformer Winding.
Voltage balance circuit 3 includes battery cell voltage balance circuit E7 (being called for short circuit E), battery bag voltage balance circuit
F8 (being called for short circuit F) and power battery voltage equalizing circuit H9 (being called for short circuit H), each equalizing circuit is by the transformation with core
Device 6 couples.Battery bag b in power battery packiVoltage balance circuit in, battery bag biIn each battery cell 5 be all connected with
One battery cell voltage balance circuit E7.It is 3 battery cell voltage balance circuit E in Fig. 1 is numbered the frame of 7.By MOS
Pipe EA11, metal-oxide-semiconductor EB13 control the charging and discharging process of battery cell voltage balance circuit E7.Each in power battery pack
Battery bag 4 is all connected with a battery bag voltage balance circuit F8, metal-oxide-semiconductor FA15, metal-oxide-semiconductor FB17 control battery bag electric voltage equalization
The charging and discharging process of circuit F8.Power battery pack 2 connects a power battery voltage equalizing circuit H9, by metal-oxide-semiconductor
HA19, metal-oxide-semiconductor HB21 control the charging and discharging process of battery voltage equalizing circuit H9.All of metal-oxide-semiconductor all passes through battery
Management system control, battery management system by control corresponding metal-oxide-semiconductor break-make select balancing battery monomer 5, battery bag 4,
Power battery pack 2.
As it is shown in figure 1, battery cell voltage balance circuit E7 includes electric capacity E10, metal-oxide-semiconductor EA11, diode EA12, MOS
The primary coil E of pipe EB13, diode EB14 and transformator.Battery bag voltage balance circuit F8 includes electric capacity F23, metal-oxide-semiconductor
The secondary coil F of FA15, diode FA16, metal-oxide-semiconductor FB17, diode FB18 and transformator.Power battery voltage equalizes
Circuit H9 includes electric capacity H24, metal-oxide-semiconductor HA19, diode HA20, metal-oxide-semiconductor HB21, diode HB22 and the secondary wire of transformator
Circle H.The two poles of the earth of described battery cell 5 are as the input of circuit E7, and in sequential series between this circuit E7 input have metal-oxide-semiconductor
EA11 and the parallel circuit of diode EA12, the primary coil E and metal-oxide-semiconductor EB13 of transformator 6 and the parallel connection of diode EB14
Circuit, wherein metal-oxide-semiconductor EA11 and metal-oxide-semiconductor EB13's is in opposite direction, and diode EA12 is in opposite direction with diode EB14's, and should
Also being parallel with electric capacity E10 between equalizing circuit E7 input, the primary coil E loop of transformator 6 is as the outfan of circuit E7.
Metal-oxide-semiconductor EA11 and diode EA12 forms NMOS tube, metal-oxide-semiconductor EB13 and diode EB14 and forms NMOS tube, the source electrode of NMOS tube
Being all connected with the input of equalizing circuit E, the drain electrode of NMOS tube is all connected with the outfan of equalizing circuit E.The two poles of the earth of described battery bag 4
As the input of circuit F8, the electricity in parallel having metal-oxide-semiconductor FA15 and diode FA16 in sequential series between this circuit F8 input
Road, the secondary loop F and metal-oxide-semiconductor FB17 of transformator 6 and the parallel circuit of diode FB18, wherein metal-oxide-semiconductor FA15 and MOS
Pipe FB17's is in opposite direction, and diode FA16 is in opposite direction with diode FB18's, and is also parallel with between this circuit F input
Electric capacity F23, wherein the secondary loop F of transformator 6 is as the outfan of circuit F8.Metal-oxide-semiconductor FA15 and diode FA16 composition
NMOS tube, metal-oxide-semiconductor FB17 and diode FB18 form NMOS tube, and the source electrode of NMOS tube connects the input of equalizing circuit F, NMOS
The drain electrode of pipe connects the outfan of equalizing circuit F.The two poles of the earth of described power battery pack 2 are as the input of circuit H9, this electricity
Between the H9 input of road in sequential series have metal-oxide-semiconductor HA19 and the parallel circuit of diode HA20, the secondary loop H of transformator 6, with
And metal-oxide-semiconductor HB21 and the parallel circuit of diode HB22, wherein metal-oxide-semiconductor HA19 and metal-oxide-semiconductor HB21's is in opposite direction, diode
HA20 is in opposite direction with diode HB22's, and is also parallel with electric capacity H24 between this circuit H input, wherein at the beginning of transformator 6
Level loop H is as the outfan of circuit H9.Metal-oxide-semiconductor HA19 and diode HA20 forms NMOS tube, metal-oxide-semiconductor HB21 and diode
HB22 forms NMOS tube, and the source electrode of NMOS tube connects the input of equalizing circuit H, and the drain electrode of NMOS tube connects equalizing circuit H's
Outfan.
Each battery cell voltage in battery bag 4 each in power battery pack 2 is entered by described voltage acquisition module 1 in real time
Row gathers, and the voltage data collected is sent to the control unit of battery management system.Battery management system calculates works as
Total voltage U of front whole power battery pack 2, obtains the average voltage U of battery cell divided by total battery cell number Nm.According to
UmTaking the battery cell equalizing voltage upper limit is UmaxcellIt is U with battery cell equalizing voltage lower limitmincell.If a certain battery list
Bulk voltage is higher than limit value UmaxcellOr less than limit value Umincell, then battery management system is judged as needing to carry out this battery cell
Balanced management.According to UmWith battery cell number M power taking pond bag electric voltage equalization upper voltage limit U in battery bagmaxpktAnd battery cell
Equalizing voltage lower limit is Uminpkt.If a certain battery bag voltage is higher than limit value UmaxpktOr less than limit value Uminpkt, then battery management
System is judged as needing this battery bag is carried out balanced management.When the voltage of battery cell 5, battery bag 4 is upper higher than set
Discharge during limit value, discharge when the voltage of battery cell 5, battery bag 4 is less than set lower limit.Under particularly
Limit value can be by user as desired to set.
Described voltage balance circuit 3 carries out electric voltage equalization pipe to selected battery cell, battery bag, power battery pack
Reason.By controlling the break-make of metal-oxide-semiconductor E11, loop can produce alternating voltage U at transformator 6 primary coil E two endsE.By control
The break-make of metal-oxide-semiconductor F17 processed, loop can produce alternating voltage U at transformator 6 secondary coil F two endsF.By controlling metal-oxide-semiconductor
The break-make of H21, loop can produce alternating voltage U at transformator 6 secondary coil H two endsH。
Described voltage balance circuit 3, according to the difference of equilibrium object, has 5 kinds of different mode of operations, including: battery list
Between bidirectional equalization, battery cell and battery bag between bidirectional equalization, battery bag and battery bag between body and battery cell
Bidirectional equalization, battery cell and power battery pack between bidirectional equalization, between battery bag and power battery pack two-way all
Weighing apparatus.By controlling the turn-on and turn-off of metal-oxide-semiconductor, it is possible to effectively control sense of current, thus realize equalizaing charge or equilibrium
Electric discharge.Realizing the active equalization of lithium-ion-power cell, balancing procedure is quickly, efficiently, flexibly.
Bidirectional equalization between described battery cell and battery cell, its balanced mode both can be a pair battery cell it
Between, it is also possible to it is between multiple battery cell；Both can be a battery cell electric discharge, multiple battery cells charge, it is also possible to
Being the electric discharge of multiple battery cell, a battery cell charges, or multiple battery cell the most multiple battery cells of electric discharge fill
Electricity.Equivalent circuit diagram is as in figure 2 it is shown, wherein there is m+n batteries monomer to participate in balancing procedure (m >=1, n >=1).Left side n in Fig. 2
One primary coil, wherein battery cell 5 of individual battery cell connection transformer 6 respectivelyiVoltage balance circuit be circuit Ei,
Battery cell 5iPositive pole to metal-oxide-semiconductor EA11 in sequential series between negative poleiWith diode EA12iParallel circuit, transformator 6
Primary coil Ei, and metal-oxide-semiconductor EB13iWith diode EB14iParallel circuit, battery cell 5 simultaneouslyiPositive and negative polarities between
Also series capacitance E10i, i=1,2 ..., n.A primary coil of m, right side battery connection transformer 6 respectively in Fig. 2, wherein
Battery cell 5 'jVoltage balance circuit be circuit E 'j, battery cell 5 'jPositive pole to metal-oxide-semiconductor EA ' in sequential series between negative pole
11’jWith diode EA ' 12 'jParallel circuit, the primary coil E ' of transformator 6j, and metal-oxide-semiconductor EB ' 13 'jWith diode EB '
14’jParallel circuit, battery cell 5 ' simultaneouslyjPositive and negative polarities between also series capacitance E ' 10 ', j=1,2 ..., m.When n saves
Battery cell 5 discharges, during m joint cell 5 ' charging.Battery management system controls metal-oxide-semiconductor EA11iTurn off, and control metal-oxide-semiconductor
EB13iThe turn-on and turn-off time so that circuit EiIn transformer EiProduce alternating voltage U1, alternating voltage U1Pass through
The conversion of transformator 6, is loaded onto circuit E 'j.Battery management system controls metal-oxide-semiconductor EA ' 11 'jConducting, and control metal-oxide-semiconductor EB '
13’jTurn off.Due to electric capacity E ' 10 'jFilter action, output voltage is converted to the DC voltage smoothed, for battery cell 5 'jFill
Electricity.When battery management system controls metal-oxide-semiconductor EB13iWith metal-oxide-semiconductor EA ' 11 'jDuring shutoff, balancing procedure stops.Otherwise, when n economizes on electricity
Pond monomer 5iCharging, m saves cell 5 'jDuring electric discharge, its work process and principle are similar.Battery management system controls metal-oxide-semiconductor
EA’11’jTurn off, and control the turn-on and turn-off time of metal-oxide-semiconductor EB ' 13 ' so that circuit E 'jIn transformer E 'jProduce
Raw alternating voltage U '1, alternating voltage U '1Through the conversion of transformator 6, it is loaded onto circuit Ei.Battery management system controls metal-oxide-semiconductor
EA11iConducting, and control metal-oxide-semiconductor EB13iTurn off.Due to electric capacity E10iFilter action, output voltage is converted to the direct current smoothed
Voltage, for battery cell 5iCharging.When battery management system controls metal-oxide-semiconductor EB ' 13 'jWith metal-oxide-semiconductor EA11iDuring shutoff, equalized
Journey stops.
The balanced mode of the bidirectional equalization between described battery bag and battery bag both can be between a pair battery bag, it is possible to
Being between multiple battery bag；Both can be a battery bag electric discharge, multiple battery bags charge, it is also possible to be that multiple battery bag is put
Electricity, the charging of battery bag, or multiple battery bag discharge the charging of multiple battery bags.Equivalent circuit diagram is as it is shown on figure 3, wherein
M+n battery bag is had to participate in balancing procedure (m >=1, n >=1).In Fig. 3, of connection transformer 6 distinguished by n, left side battery bag
Secondary coil, wherein battery bag 4iVoltage balance circuit be circuit Fi, battery bag 4iBoth positive and negative polarity between series capacitance F23i,
Battery bag 4iPositive pole to metal-oxide-semiconductor FA15 in sequential series between negative poleiWith diode FA16iParallel circuit, transformator 6 time
Level coil Fi, and metal-oxide-semiconductor FB17iWith diode FB18iParallel circuit, i=1,2 ..., n.M the battery bag in right side in Fig. 3
A secondary coil of connection transformer 6, wherein battery bag 4 ' respectivelyjVoltage balance circuit be circuit F 'j, battery bag 4 'j's
' 23 ' of series capacitance F between both positive and negative polarityj, battery bag 4 'jPositive pole to metal-oxide-semiconductor FA ' 15 ' in sequential series between negative polejWith diode
FA’16’jParallel circuit, the secondary coil F ' of transformator 6j, and metal-oxide-semiconductor FB ' 17 'jWith diode FB ' 18 'jElectricity in parallel
Road, j=1,2 ..., m.When n battery bag 4i(i=1,2 ..., n) electric discharge, m battery bag 4 'j(j=1,2 ..., m) during charging.
Battery management system controls metal-oxide-semiconductor FA15iTurn off, and control metal-oxide-semiconductor FB17iThe turn-on and turn-off time so that circuit FiBecoming
The secondary coil F of depressor 6iProduce alternating voltage U2, alternating voltage U2Through the conversion of transformator 6, it is loaded onto circuit F 'j.Battery
Management system controls metal-oxide-semiconductor FA ' 15 'jConducting, and control metal-oxide-semiconductor FB ' 17 'jTurn off.Due to electric capacity F ' 23 'jFilter action,
Output voltage is converted to the DC voltage smoothed, for battery bag 4 'jCharging.When battery management system controls metal-oxide-semiconductor FA17iAnd MOS
Pipe FA ' 15 'jDuring shutoff, balancing procedure stops.Otherwise, when n battery bag 4iCharging, m battery bag 4 'jDuring electric discharge, cell tube
Reason system controls metal-oxide-semiconductor FA ' 15 'jTurn off, and control metal-oxide-semiconductor FB ' 17 'jThe turn-on and turn-off time so that circuit F 'jBecoming
Depressor secondary coil F 'jProduce alternating voltage U '2, alternating voltage U '2Through the conversion of transformator 6, it is loaded onto circuit Fi.Battery
Management system controls metal-oxide-semiconductor FA15iConducting, and control metal-oxide-semiconductor FB17iTurn off.Due to electric capacity F23iThe effect of filtering, output
Voltage is converted to the DC voltage smoothed, for battery bag 4iCharging.When battery management system controls metal-oxide-semiconductor FB ' 17 'jAnd metal-oxide-semiconductor
FA15iDuring shutoff, balancing procedure stops.
The balanced mode of the bidirectional equalization between described battery cell and battery bag both can be a battery cell and
Between individual battery bag, it is also possible to be between multiple battery cell and a battery bag.Equivalent circuit diagram as shown in Figure 4, wherein has n
Batteries monomer participates in balancing procedure (n >=1) with battery bag.N the battery cell, labelling i-th battery cell is had to be on the left of Fig. 4
5i, battery cell 5iBoth positive and negative polarity between series capacitance E10i, battery cell 5iPositive pole to metal-oxide-semiconductor in sequential series between negative pole
EA11iWith diode EA12iParallel circuit, the secondary coil E of transformator 6i, metal-oxide-semiconductor EB13iWith diode EB14iParallel connection
Circuit, i=1,2 ..., n.1 battery bag 4 is had on the right side of Fig. 4, series capacitance F23 between the both positive and negative polarity of battery bag 4, battery bag 4
Positive pole is to metal-oxide-semiconductor FA15 in sequential series between negative pole and the parallel circuit of diode FA16, secondary coil F, MOS of transformator 6
The parallel circuit of pipe FB17 and diode FB18.When n batteries monomer 5i(i=1,2 ..., n) electric discharge, when battery bag 4 charges.
Battery management system controls metal-oxide-semiconductor EA11iTurn off, and control metal-oxide-semiconductor EB13iThe turn-on and turn-off time so that circuit E become
The primary coil E of depressor 6 produces alternating voltage U3, alternating voltage U3Through the conversion of transformator 6, it is loaded onto circuit F.Cell tube
Reason system controls metal-oxide-semiconductor FA15 conducting, and controls metal-oxide-semiconductor FB17 shutoff.Due to the filter action of electric capacity F23, output voltage turns
It is changed to the DC voltage smoothed, charges for battery bag 4.When battery management system controls metal-oxide-semiconductor EB13iTurn off with metal-oxide-semiconductor FA15
Time, balancing procedure stops.Otherwise, when battery bag 4 discharges, n batteries monomer 5i(i=1,2 ..., n) during charging.Battery management
System controls metal-oxide-semiconductor FA15 and turns off, and controls the turn-on and turn-off time of metal-oxide-semiconductor FB17 so that circuit F transformator 6 time
Level coil F produces alternating voltage U4, alternating voltage U4Through the conversion of transformator 6, it is loaded onto circuit E.Battery management system controls
Metal-oxide-semiconductor EA11iConducting, and control metal-oxide-semiconductor EB13iTurn off.Due to electric capacity E10iFilter action, output voltage is converted to smooth
DC voltage, for battery cell 5iCharging.When battery management system controls metal-oxide-semiconductor EA11iWhen turning off with metal-oxide-semiconductor FB17, equilibrium
Process stops.
The balanced mode of the bidirectional equalization between described battery cell and power battery pack both can be a battery cell
And between set of cells, it is also possible to it is between multiple battery cell and set of cells.Equivalent circuit diagram is as it is shown in figure 5, wherein n battery
Monomer and power battery pack participate in balancing procedure (n >=1).Fig. 5 has on the left of transformator 6 n battery cell, labelling i-th electricity
Pond monomer is 5i, battery cell 5iPositive pole to metal-oxide-semiconductor EA11 in sequential series between negative poleiWith diode EA12iElectricity in parallel
Road, the secondary coil E of transformator 6i, metal-oxide-semiconductor EB13iWith diode EB14iParallel circuit, i=1,2 ..., n.Transformation in Fig. 5
Be power battery pack 2 on the right side of device 6, series capacitance H24 between the both positive and negative polarity of power battery pack 2, the positive pole of set of cells 2 to negative pole it
Between metal-oxide-semiconductor HA19 in sequential series and the parallel circuit of diode HA20, the secondary coil H of transformator 6, metal-oxide-semiconductor HB21 and two poles
The parallel circuit of pipe HB22.When n battery cell 5i(i=1,2 ..., n) electric discharge, when power battery pack 2 is charged.Battery management
System controls metal-oxide-semiconductor EA11iTurn off, and control metal-oxide-semiconductor EB13iThe turn-on and turn-off time so that circuit E is at the beginning of transformator 6
Level coil E produces alternating voltage U5, alternating voltage U5Through the conversion of transformator 6, it is loaded onto circuit H.Battery management system controls
Metal-oxide-semiconductor HA19 turns on, and controls metal-oxide-semiconductor HB21 shutoff.Due to the filter action of electric capacity H24, output voltage is converted to smooth
DC voltage, charges for power battery pack 2.When battery management system controls metal-oxide-semiconductor EB13iWhen turning off with metal-oxide-semiconductor HA19, equilibrium
Process stops.Otherwise, when power battery pack 2 is discharged, n battery cell 5i(i=1,2 ..., n) during charging.Battery management system
Control metal-oxide-semiconductor HA19 to turn off, and control the turn-on and turn-off time of metal-oxide-semiconductor HB21 so that circuit H is in the secondary wire of transformator 6
Circle H produces alternating voltage U6, alternating voltage U6Through the conversion of transformator 6, it is loaded onto circuit E.Battery management system controls MOS
Pipe EA11iConducting, and control metal-oxide-semiconductor EB13iTurn off.Due to electric capacity E10iFilter action, it is straight that output voltage is converted to smooth
Stream voltage, for battery cell 5iCharging.When battery management system controls metal-oxide-semiconductor EA11iWhen turning off with metal-oxide-semiconductor HB21, balancing procedure
Stop.
The balanced mode of the bidirectional equalization between described battery bag and power battery pack both can be a battery bag and electricity
Between the group of pond, it is also possible to be between multiple battery bag and set of cells.As shown in Figure 6, wherein n battery bag is with dynamic for equivalent circuit diagram
Power set of cells participates in equilibrium (n >=1).Being n battery bag on the left of transformator 6 in Fig. 6, labelling i-th battery bag is 4i, i-th
Series capacitance F23 between the both positive and negative polarity of battery bagi, battery bag 4iPositive pole to the metal-oxide-semiconductor FA15 that connects between negative poleiWith diode
FA16iParallel circuit, the secondary coil F of transformator 6i, and metal-oxide-semiconductor FB17iWith diode FB18iParallel circuit, i=1,
2,…,n.Fig. 6 is power battery pack 2 on the right side of transformator 6, series capacitance H24 between the both positive and negative polarity of power battery pack 2, battery
The positive pole of group 2 is to metal-oxide-semiconductor HA19 in sequential series between negative pole and the parallel circuit of diode HA20, the secondary coil of transformator 6
H, metal-oxide-semiconductor HB21 and the parallel circuit of diode HB22.When n battery bag 4i(i=1,2 ..., n) electric discharge, power battery pack 2
During charging.Battery management system controls metal-oxide-semiconductor FA15iTurn off, and control metal-oxide-semiconductor FB17iThe turn-on and turn-off time so that electricity
Pond bag voltage balance circuit F produces alternating voltage U at the secondary coil F of transformator 67, alternating voltage U7Turning through transformator 6
Change, be loaded onto power battery voltage equalizing circuit H.Battery management system controls metal-oxide-semiconductor HA19 conducting, and controls metal-oxide-semiconductor
HB21 turns off.Due to the filter action of electric capacity H24, output voltage is converted to the DC voltage smoothed, and fills for power battery pack 2
Electricity.When battery management system controls metal-oxide-semiconductor FB17iWhen turning off with metal-oxide-semiconductor HA19, balancing procedure stops.Otherwise, work as electrokinetic cell
Group 2 electric discharge, n set of cells 4i(i=1,2 ..., n) during charging, battery management system controls metal-oxide-semiconductor HA19 and turns off, and controls
The turn-on and turn-off time of metal-oxide-semiconductor HB21 so that power battery voltage equalizing circuit H produces at the secondary coil H of transformator 6
Alternating voltage U8, alternating voltage U8Through the conversion of transformator 6, it is loaded onto battery bag voltage balance circuit F.Battery management system
Control metal-oxide-semiconductor FA15iConducting, and control metal-oxide-semiconductor FB17iTurn off.Due to electric capacity F23iFilter action, output voltage is converted to
Smooth DC voltage, for battery bag 4iCharging.When battery management system controls metal-oxide-semiconductor FA15iWhen turning off with metal-oxide-semiconductor HB21, all
Weighing apparatus process stops.
In Fig. 2～Fig. 6, battery cell, battery bag and the power battery pack that transformator 6 left and right sides is placed, is only one
Signal, describes the process of charging and discharging for convenience, in actual use, does not limit concrete placement location.
Transformator 6 can also be changed into the discharge resistance array with same-interface by the present invention, by corresponding monomer around
Group replaces to discharge resistance.For battery bag a in power battery pack, its voltage balance circuit is replaced with discharge resistance array,
Then each battery bag in each battery cell in battery bag a, power battery pack and whole power battery pack are led to respectively
Cross two equalizer switch metal-oxide-semiconductors to be connected on a discharge resistance.By controlling the break-make of two equalizer switch metal-oxide-semiconductors, it is achieved
To battery cell, battery bag or the electric discharge of power battery pack.Due to the scheme using sample circuit to separate with equalizing circuit, make all
The size of weighing apparatus electric current does not affect the precision of sampling, thus can realize the equalization discharge of the big electric current of battery cell, namely
Realize the passive equilibrium of big electric current.The size of euqalizing current depends on the size of selected discharge resistance and dissipating of discharge resistance
Enthusiasm condition.
Battery management system of the present invention (BMS) is mixing based on Infineon's XC2000 series monolithic design
Power vehicle battery management system, is widely used in the fields such as pure electric automobile, hybrid vehicle, energy-accumulating power station, back-up source
Close.Its main feature is as follows:
1) operating voltage range: 9V～48V, has reverse connecting protection, overvoltage protection and overcurrent protection；
2) operating temperature range: 40to105 DEG C；
3) each module low-voltage power supply communication and set of cells sampling equilibrium are respectively adopted the connector of separation, both can realize
Effective electrical equipment isolation, also allows for management and safeguards.Each module can one battery bag 4 of corresponding management.
The input interface of BMS:
1) each module has 12 joint monomer voltage detection inputs, and detection voltage accuracy is up to ± 3mV；
2) each module has 7 road temperature sensor signal input interfaces；
3) each module has system power supply enable input.
The output circuit of BMS:
Each module has the ability of management 12 joint monomer, average isostatic electric current 5A, and maximum euqalizing current is up to 20A.
Claims (6)
1. a lithium-ion-power cell discharge and recharge active equalization circuit, it is characterised in that: each in power battery pack
Battery bag is both provided with voltage acquisition module and voltage balance circuit；Described voltage acquisition module and each electricity in battery bag
Pond monomer is connected, and the voltage of each battery cell of Real-time Collection is also sent to battery management system；Voltage balance circuit includes all
Weighing apparatus transformator and equalizer switch metal-oxide-semiconductor, equalizer transformer is the same core transformer of a Multiple coil；
In power battery pack in the voltage balance circuit of battery bag a, in each battery cell in battery bag a, power battery pack
Each battery bag and whole power battery pack be connected to the one of same core transformer by two equalizer switch metal-oxide-semiconductors respectively
On individual winding；Battery management system controls the break-make of equalizer switch metal-oxide-semiconductor, is coupled out and equalizes electricity accordingly in equalizer transformer
Pressure, it is achieved to battery cell, battery bag and the active equalization of power battery pack discharge and recharge；
Described voltage balance circuit includes battery cell voltage balance circuit E, battery bag voltage balance circuit F and electrokinetic cell
Group voltage balance circuit H；For the battery bag a in power battery pack, in battery bag a, each battery cell is all connected with a battery
Monomer voltage equalizing circuit E, each battery bag in power battery pack is all connected with a battery bag voltage balance circuit F, whole
Power battery pack connects a battery voltage equalizing circuit H；Each voltage balance circuit E, F and H are by the transformator coupling with core
Close；The input of equalizing circuit E, F or H is corresponding battery cell, battery bag or the positive and negative polarities of power battery pack, outfan
For corresponding Transformer Winding coil；
Equalizing circuit E, F and H all include the transformator of the first equalizer switch metal-oxide-semiconductor, the second equalizer switch metal-oxide-semiconductor and correspondence around
Group；When battery cell, battery bag or power battery pack are discharged, control the first equalizer switch metal-oxide-semiconductor conducting and make positive pole
Turn on corresponding Transformer Winding, control the turn-on and turn-off time of the second equalizer switch metal-oxide-semiconductor so that at corresponding transformator
Alternating voltage is produced on winding；When battery cell, battery bag or power battery pack are charged, control the first equalizer switch
Metal-oxide-semiconductor and the break-make of the second equalizer switch metal-oxide-semiconductor so that transformer-coupled euqalizing current arrival positive pole, and reverse electric current
It is blocked；
Described battery cell voltage balance circuit E, including electric capacity E, metal-oxide-semiconductor EA, diode EA, metal-oxide-semiconductor EB, diode EB and
The primary coil E of transformator；The positive and negative polarities of battery cell are as the input of equalizing circuit E, in sequential series between input
There is the electricity in parallel of metal-oxide-semiconductor EA and the parallel circuit of diode EA, the primary coil E and metal-oxide-semiconductor EB of transformator and diode EB
Road, wherein metal-oxide-semiconductor EA and wherein metal-oxide-semiconductor EB's is in opposite direction, and diode EA is in opposite direction with diode EB's, and input it
Between be also parallel with electric capacity E, the primary coil E of transformator is as the outfan of equalizing circuit E；Described metal-oxide-semiconductor EA and diode
EA forms NMOS tube, metal-oxide-semiconductor EB and diode EB and forms NMOS tube, and the source electrode of NMOS tube connects the input of equalizing circuit E,
The drain electrode of NMOS tube connects the outfan of equalizing circuit E；
Described battery bag voltage balance circuit F, including electric capacity F, metal-oxide-semiconductor FA, diode FA, metal-oxide-semiconductor FB, diode FB and change
The secondary coil F of depressor；The positive and negative polarities of battery bag are as the input of equalizing circuit F, and in sequential series between input have MOS
Pipe FA and the parallel circuit of diode FA, the secondary coil F and metal-oxide-semiconductor FB of transformator and the parallel circuit of diode FB, its
Middle metal-oxide-semiconductor FA and metal-oxide-semiconductor FB's is in opposite direction, and diode FA is in opposite direction with diode FB's, and also parallel connection between input
Having electric capacity F, the secondary coil F of transformator is as the outfan of equalizing circuit F；Described metal-oxide-semiconductor FA and diode FA composition
NMOS tube, metal-oxide-semiconductor FB and diode FB form NMOS tube, and the source electrode of NMOS tube connects the input of equalizing circuit F, NMOS tube
Drain electrode connects the outfan of equalizing circuit F；
Described power battery voltage equalizing circuit H, including electric capacity H, metal-oxide-semiconductor HA, diode HA, metal-oxide-semiconductor HB, diode HB
Secondary coil H with transformator；The positive and negative polarities of power battery pack are as the input of equalizing circuit H, between input sequentially
It is in series with metal-oxide-semiconductor HA and the parallel circuit of diode HA, the secondary coil H and metal-oxide-semiconductor HB of transformator and diode HB also
Connection circuit, wherein metal-oxide-semiconductor HA and metal-oxide-semiconductor HB's is in opposite direction, and diode HA is in opposite direction with diode HB's, and input it
Between be also parallel with electric capacity H, the secondary coil H of transformator is as the outfan of equalizing circuit H；Described metal-oxide-semiconductor HA and diode
HA forms NMOS tube, metal-oxide-semiconductor HB and diode HB and forms NMOS tube, and the source electrode of NMOS tube connects the input of equalizing circuit H,
The drain electrode of NMOS tube connects the outfan of equalizing circuit H.
Lithium-ion-power cell discharge and recharge active equalization circuit the most according to claim 1, it is characterised in that: described electricity
Pond monomer voltage equalizing circuit E, the equalizer switch in battery bag voltage balance circuit F and power battery voltage equalizing circuit H
Metal-oxide-semiconductor, it is placed on the battery cell of residing equalizing circuit E, F or H, battery bag or the both positive and negative polarity of power battery pack and transformator
Optional position between winding coil.
Lithium-ion-power cell discharge and recharge active equalization circuit the most according to claim 1, it is characterised in that: described electricity
Pond management system, obtains the total voltage of whole power battery pack, thus obtains electricity according to all battery cell voltages gathered
The average voltage U of pond monomerm, according to average voltage UmBattery cell and the higher limit of battery bag and lower limit are set；When battery list
When the voltage of body or battery bag is higher than corresponding higher limit, battery management system controls the break-make of corresponding equalizer switch metal-oxide-semiconductor,
Discharge；When the voltage of battery cell or battery bag is less than corresponding lower limit, battery management system controls corresponding equal
The break-make of weighing apparatus switch metal-oxide-semiconductor, discharges.
Lithium-ion-power cell discharge and recharge active equalization circuit the most according to claim 1, it is characterised in that: described is equal
Weighing apparatus switch metal-oxide-semiconductor uses the combination of any one device following or any two kinds of devices to realize: NMOS tube, PMOS, DUAL
NMOS tube, DUAL PMOS.
Lithium-ion-power cell discharge and recharge active equalization circuit the most according to claim 1, it is characterised in that: described lithium
Ion battery discharge and recharge active equalization circuit, including 5 kinds of mode of operations: between battery cell and battery cell two-way all
Bidirectional equalization, battery cell and power between weighing apparatus, bidirectional equalization, battery cell and battery bag between battery bag and battery bag
Bidirectional equalization between set of cells, the bidirectional equalization between battery bag and power battery pack；In each of these modes of operation, every kind all
Being one to one or one-to-many or multi-to-multi between weighing apparatus main body, equilibrium main body includes battery cell, battery bag and power battery pack.
Lithium-ion-power cell discharge and recharge active equalization circuit the most according to claim 1, it is characterised in that: described is equal
Weighing apparatus transformator, replaces with discharge resistance array；In power battery pack in the voltage balance circuit of battery bag a, every in battery bag a
Each battery bag and whole power battery pack in individual battery cell, power battery pack pass through two equalizer switches respectively
Metal-oxide-semiconductor is connected on a discharge resistance, by controlling the break-make of two equalizer switch metal-oxide-semiconductors, it is achieved to battery cell, battery
Bag or the electric discharge of power battery pack.
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| CN105990860B (en) * | 2015-01-30 | 2018-12-07 | 中国移动通信集团甘肃有限公司 | A kind of method, apparatus and battery system of battery pack power equilibrium |
| CN105186629A (en) * | 2015-10-14 | 2015-12-23 | 北京新能源汽车股份有限公司 | Electric automobile and power battery active equalizing system thereof |
| CN105226775A (en) * | 2015-11-13 | 2016-01-06 | 中山大学 | The nondissipative equalization method of lithium ion battery of electric automobile group |
| CN107769313B (en) * | 2017-10-30 | 2020-06-23 | 华泰慧能（北京）能源技术有限公司 | Storage battery dynamic voltage-sharing circuit in energy storage frequency modulation system and control method |
| CN107878231A (en) * | 2017-11-02 | 2018-04-06 | 深圳市科列技术股份有限公司 | A kind of equalizing circuit and method for controlling power battery pack |
| CN108110832A (en) * | 2017-12-25 | 2018-06-01 | 上海电气集团股份有限公司 | A kind of battery core control circuit, battery and control method |
| CN108494062A (en) * | 2018-05-18 | 2018-09-04 | 深圳市海雷新能源有限公司 | A kind of intelligent balanced double charging sources |
| CN108583347B (en) * | 2018-06-06 | 2023-05-16 | 昆明理工大学 | Equalization circuit for parallel charging and selective single battery discharging equalization and control method thereof |
| CN108899970A (en) * | 2018-09-06 | 2018-11-27 | 杭州高特电子设备股份有限公司 | A kind of two-way active equalization management system for protecting startup power supply |
| CN111137170A (en) * | 2018-11-05 | 2020-05-12 | 重庆峘能电动车科技有限公司 | Power battery pack balancing system, battery replacing system and battery pack |
| CN109572484A (en) * | 2018-12-04 | 2019-04-05 | 深圳市国新动力科技有限公司 | A kind of Multi-function compatible type active equalization circuit and method |
| CN109687554A (en) * | 2019-01-21 | 2019-04-26 | 蓝海智能科技有限公司 | A kind of charge protection system and method for portable intelligent battery pack |
| CN110745032A (en) * | 2019-10-25 | 2020-02-04 | 江苏威蜂动力工业有限公司 | Balance control system and method for automobile lithium battery |
| CN111152686A (en) * | 2019-12-31 | 2020-05-15 | 江西科然科技有限公司 | Battery management system for active equalization of battery pack of electric vehicle |
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| CN102122836A (en) * | 2011-04-01 | 2011-07-13 | 北京航空航天大学 | Charging/discharging active equalization circuit for lithium ion power battery pack |
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