CN206422562U - Circuit of battery pack balancing based on outside energy-storage units Yu LC quasi-resonances - Google Patents
Circuit of battery pack balancing based on outside energy-storage units Yu LC quasi-resonances Download PDFInfo
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- CN206422562U CN206422562U CN201720028107.6U CN201720028107U CN206422562U CN 206422562 U CN206422562 U CN 206422562U CN 201720028107 U CN201720028107 U CN 201720028107U CN 206422562 U CN206422562 U CN 206422562U
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium Ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 2
- 229910018095 Ni-MH Inorganic materials 0.000 claims description 2
- 229910018477 Ni—MH Inorganic materials 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims 1
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Abstract
Circuit of battery pack balancing based on outside energy-storage units Yu LC quasi-resonances disclosed in the utility model, including series battery, gating switch, balanced bus, LC series connection quasi-resonances unit, buck unit, outside energy-storage units, voltage detecting circuit and controller；Wherein series battery is that n monomer energy-storage battery is in series；Gating switch includes 2n two-way gate-controlled switches, and positive pole, the negative pole of monomer energy-storage battery are connected to positive pole, the negative pole of balanced bus by two-way gate-controlled switch respectively；Balanced bus is sequentially connected in series LC series connection quasi-resonances unit, buck unit, outside energy-storage units；Controller is connected with gating switch, LC series connection quasi-resonance units respectively, and voltage detecting circuit detects monomer energy-storage battery, the voltage signal of buck unit and transmitted to controller respectively.Equalizing circuit of the present utility model, actively quick, efficient equilibrium is carried out to battery pack, prevents battery from super-charge super-discharge phenomenon occur, improves battery with two side terminals.
Description
Technical field
The utility model is related to the balanced field of series battery, more particularly to based on outside energy-storage units and LC quasi-resonances
Circuit of battery pack balancing.
Background technology
In recent years, with air quality go from bad to worse and petroleum resources gradually deficient, new-energy automobile, especially
Pure electric automobile turns into the exploitation focus of major motor corporations of the world today.Power battery pack as electric automobile crucial portion
Part, has significant impact to vehicle dynamic property, economy and security.Power battery pack after multiple charge and discharge cycles,
The situation that height differs will substantially occurs in the distribution of the residual capacity of each battery cell, if not being subject to equilibrium will easily occur
Fill and cross and put phenomenon.Consequently, it is possible in actual use, battery pack service life will be had a strong impact on, in addition it is on fire in the presence of overheating
Potential safety hazard.
For above-mentioned situation, in order to improve the problem of inconsistency of battery pack, the overall performance of battery pack is improved, then is needed
Using Balance route.The method of current Li-ion batteries piles Balance route, according to consumption feelings of the circuit in balancing procedure to energy
Condition, can be divided into energy-dissipating and the major class of energy non-dissipative type two；Dissipative type is in every section cell loong shunt shunting electricity
Resistance, by controlling corresponding switching device to fall the energy of the higher battery unit of residual capacity by resistance consumption, this method
Energy is wasted, and substantial amounts of heat is generated in balancing procedure, the load of battery thermal management is added.It is non-to dissipate
Type realizes the transfer of energy by outside batteries DC-DC circuit.It can be divided into switching capacity type, switch electricity according to equalizing device difference
Sense type, transformer type, DC-DC changes the topologys such as type.
The equalizing circuit euqalizing current of traditional switch capacity type is confined to battery pressure difference, with subtracting for battery pressure difference
Small, euqalizing current is decayed rapidly, so balancing speed is slower.And switch is hard switching in balancing procedure, loss is big, balanced
It is less efficient, and because switching tube has conduction voltage drop with diode, cause that zero-voltage difference can not be accomplished during equilibrium.
Chinese utility model patent application (application number 201210595724.6) proposes a kind of battery balanced electricity of capacitor type
Road, the circuit shares an electric capacity per two adjacent batteries, and when the higher battery cell of electric capacity and voltage is in parallel, battery is given
Electric capacity charges；When the relatively low battery cell of electric capacity and voltage is in parallel, electric capacity charges the battery.By the charge and discharge of electric capacity, energy
Amount is transferred to the relatively low battery cell of voltage from the higher battery cell of voltage, so that its voltage is equal.But when series connection
Battery cell quantity is more, and required balanced electric capacity and FET and its drive circuit are more, cause circuit bulky,
And when voltage highest and the adjacent multiple monomers of minimum battery so that equalization efficiency can be substantially reduced.
Chinese utility model patent (B of Authorization Notice No. CN 103296731) proposes a kind of electrokinetic cell zero current and opened
Close active equalization circuit and implementation method, its can voltage highest and minimum battery cell in real-time judge battery pack, it is and right
It carries out Zero Current Switch equilibrium, and balanced two battery cells maximum both for voltage difference in battery pack are carried out every time
Peak load shifting, improves equalization efficiency.But, because there is conduction voltage drop in used power electronic devices so that battery list
Zero-voltage difference, and euqalizing current very little are extremely difficult between body, time for balance is longer.
Utility model content
The purpose of this utility model is to overcome the shortcoming and deficiency of prior art, and there is provided based on outside energy-storage units and LC
The circuit of battery pack balancing of quasi-resonance, it is adaptable to the accumulation of energy dress in mixed power electric car, pure electric automobile or storage station
The battery management system put.
The purpose of this utility model is realized by following technical scheme：
Circuit of battery pack balancing based on outside energy-storage units Yu LC quasi-resonances, including series battery, gating switch,
Weigh bus, LC series connection quasi-resonances unit, buck unit, outside energy-storage units, voltage detecting circuit and controller；
Wherein, the series battery is that n monomer energy-storage battery Bi is in series；Gating switch comprising 2n is two-way can
Control switch, being divided into two groups of a, b wherein a groups switches includes two-way gate-controlled switch S1a, S2a ..., Sna, b groups switch include it is two-way can
Control switch S1b, S2b ..., Snb, two-way gate-controlled switch Sia and two-way gate-controlled switch Sib one-to-one corresponding, two-way gate-controlled switch Sia
One end be connected to monomer energy-storage battery Bi positive pole, the other end is connected to the positive pole of balanced bus, two-way gate-controlled switch Sib mono-
End is connected to monomer energy-storage battery Bi negative pole, and the other end is connected to the negative pole of balanced bus, wherein i=1,2 ..., n；It is balanced
Bus is sequentially connected in series LC series connection quasi-resonances unit, buck unit, outside energy-storage units；The controller is opened with gating respectively
Close, LC series connection quasi-resonance units are connected, voltage detecting circuit detects the voltage letter of monomer energy-storage battery Bi, buck unit respectively
Number and transmit to controller.
The controller is used for the voltage signal for gathering monomer energy-storage battery Bi and buck unit, it is determined that needing in a balanced way
Monomer energy-storage battery Bi and its balanced way, by controlling gating switch, gating need in a balanced way cell to balanced bus
On；By control LC connect quasi-resonance unit and buck unit connection whether, LC is connected the work of quasi-resonance units alternately
It is quasi-resonance state in the state and charge and discharge process of charge and discharge, realizes monomer energy-storage battery Bi and outside energy-storage units
Between bidirectional energy exchange.
The LC series connection quasi-resonances unit includes inductance Lr, electric capacity Cr, and two-way gate-controlled switch S1, S2；Wherein electric capacity
Cr one end is connected with inductance Lr one end, and the inductance Lr other end is the positive pole of balanced bus, and the electric capacity Cr other end is equal
The negative pole of weighing apparatus bus；Two-way gate-controlled switch S1 one end is connected to the positive pole of balanced bus, and the other end is connected to buck unit, double
Balanced bus negative pole is connected to gate-controlled switch S2 one end, the other end is also connected to buck unit.
The buck unit is buck-boost circuits, and buck-boost circuits include filter capacitor C0, DC-DC electricity
Road, wherein filter capacitor C0It is connected in parallel with DC-DC circuit, filter capacitor C0Positive pole be connected with two-way gate-controlled switch S1, filter
Electric capacity C0Negative pole be connected with two-way gate-controlled switch S2；DC-DC circuit is connected with outside energy-storage units.Buck-boost circuit roots
Filter capacitor C is determined according to gating cell voltage grade and its balanced way0Voltage class.
The two-way gate-controlled switch is aoxidized by the N-channel metal-oxide-semiconductor field effect t M1 of two series connection with N-channel metal
Thing FET M2 differential concatenations are constituted, N-channel metal-oxide-semiconductor field effect t M1 and N-channel metal-oxide-semiconductor field effect t M2
Gate electrode drive signals it is identical.
Gating switch Sia, Sib of the monomer energy-storage battery Bi and two-way gate-controlled switch S1, S2 drive signal are one
To unipolar complementary pwm signal, its dutycycle is 50%, its switching frequency fs by equivalent rlc circuit quasi-resonance frequency
Rate fr determines that fr is determined by lumped parameter R, Lr, Cr of equalizing circuit.Sia, Sib replace switching with S1, S2's, LC is connected
Circuit is operated under quasi-resonance state, realizes gating switch Sia, Sib and two-way gate-controlled switch S1, S2 zero current switching, reduction
Switching loss.
The monomer energy-storage battery Bi includes lithium ion battery, lead-acid battery, ultracapacitor, Ni-MH battery.
Its operation principle is as follows：
(1) monomer energy-storage battery voltage is obtained, battery average voltage Vavr is calculated；
(2) balanced way is judged：Under battery pack charging status, discharged to voltage highest battery, reduce it and fill
Electric current；Under battery power discharge state, the battery minimum to voltage is charged, and reduces its discharge current；Shelved in battery
Under state, sub-average battery is charged, the battery higher than average value is discharged；
(3) energy transmission direction is judged：If being charged to cell, energy sequentially passes through buck from outside energy-storage units
Unit, series connection quasi-resonance unit, pass to cell；If discharging cell, energy passes through LC from cell
Outside energy-storage units are passed to buck-boost circuits；
(4) gating battery, startup are balanced：Gating needs battery in a balanced way, and according to energy transmission direction, control is accordingly opened
Close, make lc circuit alternation in charging, discharge condition, the energy exchange of battery and outside energy-storage units is realized, until reaching
The equilibrium condition of controller setting, equilibrium terminates.
The utility model compared with prior art, has the following advantages that and beneficial effect：
1st, the circuit of battery pack balancing described in the utility model based on outside energy-storage units and LC quasi-resonances, can be in electricity
Pond group charging, electric discharge, are shelved under state, actively quick to battery pack progress, efficient balanced, prevent battery from super-charge super-discharge occur
Phenomenon, improves battery with two side terminals.
2nd, the utility model realizes the zero current switching of switching device, reduces the switching loss of switching device, improves
Equalization efficiency；Realize cell zero-voltage difference balanced, increase euqalizing current, shorten time for balance and be easy to unit
Change and realize.
Brief description of the drawings
Fig. 1 is the circuit described in the utility model based on outside energy-storage units Yu the circuit of battery pack balancing of LC quasi-resonances
Figure.
Fig. 2 is the schematic diagram for the two-way gate-controlled switch that two N-channel Mosfet are constituted.
Fig. 3 is LC quasi-resonance circuit unit schematic diagrams.
Fig. 4 is outside energy-storage units and buck element circuit schematic diagram.
Fig. 5 a are that outside energy-storage units give LC quasi-resonances circuit charging schematic diagram by buck-boost circuits.
Fig. 5 b are that LC quasi-resonances circuit gives low-voltage battery charging schematic diagram by gating switch.
Fig. 6 is oscillogram of the four section series-connected cells in emulation experiment, and wherein Vg1 is that gating switch S1a, S1b drive letter
Number, Vg5 is S1, S2 drive signal, Vc capacitance voltages, the waveform of iL inductive currents.
Fig. 7 is voltage oscillogram of the four section series-connected cells in emulation experiment.
Embodiment
The utility model is described in further detail with reference to embodiment and accompanying drawing, but implementation of the present utility model
Mode not limited to this.
Such as Fig. 1, the circuit of battery pack balancing based on outside energy-storage units Yu LC quasi-resonances, including series battery 101, choosing
Open up pass 102, balanced bus, LC series connection quasi-resonances unit 103, buck unit 104, outside energy-storage units 105, voltage detecting
Circuit and controller 106；
Wherein, the battery pack is that (i=1,2 ..., n) are in series n energy-storage battery Bi.The LC series connection quasi-resonance
Unit is made up of an an inductance Lr and electric capacity Cr and two two-way gate-controlled switch S1 and S2.Cr connects with Lr, and one end is
Balanced bus positive pole, one end is balanced bus negative pole.S1 one end is connected to balanced bus positive pole, and the other end is connected to buck list
Filter capacitor C in member0Positive pole.S2 one end is connected to balanced bus negative pole, and the other end is also connected to the C0Negative pole.
The buck unit is made up of buck-boost circuits, and one end is connected to outside energy-storage units, one end by S1,
S2 is connected with LC series circuits.
The gating switch includes 2n two-way gate-controlled switches, is divided into a, two groups of b.The a groups switch includes two-way controllable
Switch S1a, S2a ..., Sna.The b groups switch includes two-way gate-controlled switch S1b, S2b ..., Snb.Sia and Sib (i=1,
2 ..., n) correspond, Sia one end is connected to Bi positive pole, and the other end is connected to the positive pole of balanced bus.Sib one end connects
Bi negative pole is connected to, the other end is connected to the negative pole of balanced bus.
The controller is used for gathering the voltage signal of cell and buck unit, it is determined that needing monomer electricity in a balanced way
Pond and its balanced way.By controlling gating switch, gating is needed on cell to balanced bus in a balanced way；Pass through control pair
Inductive switch, it is quasi-resonance state in the state and charge and discharge process of charge and discharge to make lc circuit alternation, realizes monomer
Bidirectional energy is exchanged between battery and outside energy-storage units.
Fig. 2 is the schematic diagram for the two-way gate-controlled switch that two N-channel Mosfet are constituted.The N-channel metal oxygen of two series connection
Compound FET M1 and M2, M1 source electrode are connected with M2 source electrode, and M1 is identical with M2 gate electrode drive signals.M1 gate pole with
M2 gate pole is connected, and with same unipolarity drive signal.M1, M2 are simultaneously turned on or simultaneously turned off.Work as M1, M2 is led simultaneously
When logical, two-way admittance can be achieved.Work as M1, it is two-way to be not turned on when M2 is simultaneously closed off.
Fig. 3 is LC series connection quasi-resonance units, the positive pole of the just extremely balanced dc bus of LC series circuits, LC series circuits
Negative pole be balanced dc bus negative pole.The LC series circuits left side is cell gating switch, and its drive signal is 106_
It is two-way gate-controlled switch S1, S2 on the right of a, lc circuit, its drive signal is that 106_b, 106_a and 106_b are a pair of complementary lists
Polarity pwm signal, dutycycle is 50%, and switching frequency fs is determined by the quasi-resonance frequency fr of equivalent rlc circuit.Gating switch
Replace switching with S1, S2, realize LC series circuit alternations in the state of charge and discharge, and charge and discharge process is
Quasi-resonance state, realizes gating switch Sia, Sib and S1, S2 zero current switchings, reduces switching loss.
Fig. 4 is outside energy-storage units and buck element circuit schematic diagram.Outside energy-storage units are by outside battery B0 structures
Into buck unit is by buck-boost circuits and filtering capacitance of voltage regulation C0Constitute.Closed loop is sent by switch tube M1 and M2
PID signal, can be achieved filtering capacitance of voltage regulation C0The stable output of different voltage class.
The balancing principle of this circuit is：
Controller determines the equilibrium side to cell according to battery pack current operating state (charging, electric discharge, shelve)
Formula.In battery pack charging process, the battery higher to voltage carries out equalization discharge, reduces its charging current, prevents overcharge,
To reach purpose in a balanced way.During battery power discharge, the battery relatively low to voltage carries out charge balancing, reduces its electric discharge electricity
Stream, prevents overdischarge, to reach purpose in a balanced way.In the state of battery pack is shelved, the battery higher than average value is put
Electrical equalization, charge balancing is carried out to sub-average battery, to reduce battery otherness, until reaching zero-voltage difference.
When cell needs charging, on the minimum battery Bi of gate voltage to balanced bus.Controller is opened gating
Close Sia and Sib and send synchronized signal, switch tube S1 and S2 sends the signal complementary with Sia, Sib drive signal.It is right
Buck-boost sends the pwm signal control C of PID closed-loop controls0Export constant high voltage VH(6-10V can be set in).Lead first
Logical S1 and S2, outside energy-storage units pass through the C in buck-boost circuits0Lc circuit is charged, turned off after a period of time
S1 and S2, opens Sia and Sib, and lc circuit charges to battery Bi, realizes that outside energy-storage units transmit energy to low-voltage battery with this
Amount.
When cell needs electric discharge, on gate voltage highest battery Bj to balanced bus.Controller is opened gating
Close Sja and Sjb and send synchronized signal, switch tube S1 and S2 sends drive signal complementary therewith.To buck-boost
Send the pwm signal control C of PID closed-loop controls0For constant low-voltage VL(2-3V can be set in).Sja and Sjb is first turned on to lead
When logical, battery Bj is charged to lc circuit, and Sia and Sib is turned off after a period of time, opens S1 and S2, and lc circuit is to C0Charging, C0It is logical
Cross buck-boost circuits and transfer energy to outside energy-storage units.Realize that high-voltage battery is transmitted to outside energy-storage units with this
Energy.
Its operation principle is as follows:
(1) monomer battery voltage is obtained, battery average voltage Vavr is calculated.
(2) balanced way is judged：Under battery pack charging status, discharged to voltage highest battery, reduce it and fill
Electric current.Under battery power discharge state, the battery minimum to voltage is charged, and reduces its discharge current.Shelved in battery
Under state, sub-average battery is charged, the battery higher than average value is discharged.
(3) energy transmission direction is judged：To cell charge, energy from outside energy-storage units by buck-boost with
Lc circuit, passes to cell.Cell is discharged, energy is from cell by LC and buck-boost circuits
Pass to outside energy-storage units.
(4) gating battery, startup are balanced：According to the result of step (2) (3), gating needs battery in a balanced way, according to energy
Direction of transfer, controlling switch makes lc circuit alternation in charging and discharging state, realizes that the energy of battery and outside energy-storage units is handed over
Change.
Shelved by series battery under state exemplified by equilibrium, shelve equalized under state to battery pack with reference to Fig. 5 a, Fig. 5 b
Journey is illustrated.
In series battery B1-B4, VB1=3.6V, VB2=3.7V, VB3=3.8V, VB4=3.9V, average value Vavr
=3.75V.
First, give voltage sub-average battery charge balancing, until its magnitude of voltage reaches average value.Such as Fig. 5 a, control
System switch M2, makes filtering capacitance of voltage regulation C in buck-boost circuits0The stable 6V voltages of output.Open two-way gate-controlled switch S1,
S2, C0Give the charging of LC series circuits, electric capacity Cr energy storage.After such as Fig. 5 b, half of harmonic period, S1, S2 are closed, and simultaneously turn on gating
S1a, S1b are switched, the minimum battery B1 of voltage is strobed on balanced bus, LC series circuits charge to B1, electric capacity Cr release energy
Amount.Move in circles, outside energy-storage units energy is quickly transmitted to B1.Until B1 voltages rise to average voltage Vavr.
Secondly, it is balanced higher than the battery discharge of average value to voltage, until its voltage drops to average value.Controlling switch
M1, is filtering capacitance of voltage regulation C in buck-boost circuits0Voltage value stabilization is in 2v.Open switch S4a, S4b, battery B4 gatings
Onto balanced bus, B4 charges to LC series circuits, electric capacity Cr energy storage.After half of harmonic period, S4a, S4b are turned off, is opened simultaneously
Pass S1, S2 are opened up, LC series circuits give filtering capacitance of voltage regulation C0Charging, Cr releases energy.C0Energy pass through buck-boost electricity
Road passes to outside energy storage battery B0.Move in circles, the energy of high-voltage battery quickly passes to outside energy-storage units.Directly
Drop to average value Vavr to B4 voltages.
Fig. 6 and Fig. 7 are the balanced emulation experiment oscillograms under the different voltage conditions of four batteries.
Fig. 6 is the current waveform and capacitance voltage waveform of switching tube drive waveforms and LC series circuits.From electric current iLRipple
Shape figure can be seen that each switch conduction shut-off moment, and LC series circuit currents are 0, and this greatly reduces the conducting of switching tube
Loss, improves equalization efficiency.
Fig. 7 is the voltage oscillogram of four batteries.B1 voltages are minimum in four batteries, B4 voltage highests, by a timing
Between equilibrium, the voltage of each cell reaches unanimity, and reaches the equalization target of controller setting.
As above technique effect described in the utility model can preferably be realized.
Circuit of battery pack balancing described in the utility model based on outside energy-storage units Yu LC quasi-resonances, can be in battery
Group charging, electric discharge, are shelved under state, actively quick to battery pack progress, efficient balanced, prevent battery from super-charge super-discharge occur and showing
As improving battery with two side terminals.The utility model realizes the zero current switching of switching device, reduces the switch of switching device
Loss, improves equalization efficiency；Realize cell zero-voltage difference balanced, increase euqalizing current, shorten time for balance
And it is easy to blocking realization.
Above-described embodiment is the utility model preferably embodiment, but embodiment of the present utility model is not by above-mentioned
The limitation of embodiment, it is other it is any without departing from Spirit Essence of the present utility model with made under principle change, modify, replace
Generation, combination, simplification, should be equivalent substitute mode, are included within protection domain of the present utility model.
Claims (6)
1. the circuit of battery pack balancing based on outside energy-storage units Yu LC quasi-resonances, it is characterised in that：Including series battery, choosing
Open up pass, balanced bus, LC series connection quasi-resonances unit, buck unit, outside energy-storage units, voltage detecting circuit and control
Device；
Wherein, the series battery is that n monomer energy-storage battery Bi is in series；Gating switch controllable is opened comprising 2n is two-way
Close, being divided into two groups of a, b wherein a groups switches includes two-way gate-controlled switch S1a, S2a ..., Sna, b groups, which are switched, includes two-way controllable open
S1b, S2b ..., Snb are closed, two-way gate-controlled switch Sia and two-way gate-controlled switch Sib is corresponded, the one of two-way gate-controlled switch Sia
End is connected to monomer energy-storage battery Bi positive pole, and the other end is connected to the positive pole of balanced bus, and two-way gate-controlled switch Sib one end connects
Monomer energy-storage battery Bi negative pole is connected to, the other end is connected to the negative pole of balanced bus, wherein i=1,2 ..., n；Balanced bus
It is sequentially connected in series LC series connection quasi-resonances unit, buck unit, outside energy-storage units；The controller respectively with gating switch, LC
Connect the connection of quasi-resonance unit, voltage detecting circuit detect respectively monomer energy-storage battery Bi, buck unit voltage signal simultaneously
Transmit to controller.
2. the circuit of battery pack balancing based on outside energy-storage units Yu LC quasi-resonances according to claim 1, it is characterised in that：
The LC series connection quasi-resonances unit includes inductance Lr, electric capacity Cr, and two-way gate-controlled switch S1, S2；Wherein electric capacity Cr one end
It is connected with inductance Lr one end, the inductance Lr other end is the positive pole of balanced bus, and the electric capacity Cr other end is balanced bus
Negative pole；Two-way gate-controlled switch S1 one end is connected to the positive pole of balanced bus, and the other end is connected to buck unit, two-way controllable to open
Close S2 one end and be connected to balanced bus negative pole, the other end is also connected to buck unit.
3. the circuit of battery pack balancing based on outside energy-storage units Yu LC quasi-resonances according to claim 2, it is characterised in that：
The buck unit is buck-boost circuits, and buck-boost circuits include filter capacitor C0, DC-DC circuit, wherein filtering
Ripple electric capacity C0It is connected in parallel with DC-DC circuit, filter capacitor C0Positive pole be connected with two-way gate-controlled switch S1, filter capacitor C0's
Negative pole is connected with two-way gate-controlled switch S2；DC-DC circuit is connected with outside energy-storage units.
4. the circuit of battery pack balancing according to claim 1 or claim 2 based on outside energy-storage units Yu LC quasi-resonances, its feature exists
In：The two-way gate-controlled switch is imitated by the N-channel metal-oxide-semiconductor field effect t M1 of two series connection with N-channel metal oxide field
Should pipe M2 differential concatenations composition, N-channel metal-oxide-semiconductor field effect t M1 and N-channel metal-oxide-semiconductor field effect t M2 gate pole
Drive signal is identical.
5. the circuit of battery pack balancing based on outside energy-storage units Yu LC quasi-resonances according to claim 1, it is characterised in that：
Gating switch Sia, Sib of the monomer energy-storage battery Bi and two-way gate-controlled switch S1, S2 drive signal are a pair of unipolarities
Complementary pwm signal, its dutycycle is 50%, and its switching frequency fs is determined by the quasi-resonance frequency fr of equivalent rlc circuit,
Fr is determined by lumped parameter R, Lr, Cr of equalizing circuit.
6. the circuit of battery pack balancing based on outside energy-storage units Yu LC quasi-resonances according to claim 1, it is characterised in that：
The monomer energy-storage battery Bi includes lithium ion battery, lead-acid battery, ultracapacitor, Ni-MH battery.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492553A (en) * | 2019-07-22 | 2019-11-22 | 国网江苏省电力有限公司电力科学研究院 | A kind of electrochemical energy storage system active equalization circuit and balance control method |
| CN111342689A (en) * | 2020-03-04 | 2020-06-26 | 广东工业大学 | Multilevel converter of energy storage system and SOC self-equalization modulation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492553A (en) * | 2019-07-22 | 2019-11-22 | 国网江苏省电力有限公司电力科学研究院 | A kind of electrochemical energy storage system active equalization circuit and balance control method |
| CN110492553B (en) * | 2019-07-22 | 2021-01-26 | 国网江苏省电力有限公司电力科学研究院 | Active equalization circuit and equalization control method for electrochemical energy storage system |
| CN111342689A (en) * | 2020-03-04 | 2020-06-26 | 广东工业大学 | Multilevel converter of energy storage system and SOC self-equalization modulation method |
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