CN106100072B - A kind of low loss series Li-ion batteries piles electric quantity balancing circuit - Google Patents
A kind of low loss series Li-ion batteries piles electric quantity balancing circuit Download PDFInfo
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- CN106100072B CN106100072B CN201610686621.9A CN201610686621A CN106100072B CN 106100072 B CN106100072 B CN 106100072B CN 201610686621 A CN201610686621 A CN 201610686621A CN 106100072 B CN106100072 B CN 106100072B
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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
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of low loss series Li-ion batteries piles electric quantity balancing circuit unit, including binodal battery cell DBs and equalizing circuit EC0Two parts, binodal battery cell DBs is by two battery cell BHAnd BLIt constitutes, enables battery cell BHJust extremely endpoint ' 1 ', battery cell BLCathode be endpoint ' 3 ', and battery cell BHCathode and battery cell BLAnode be connected, junction is endpoint ' 2 '.Equalizing circuit EC0By two groups of semiconductor switch SHAnd DH、SLAnd DLAnd inductance L0Composition, semiconductor switch SHAnd SLRespectively band anti-paralleled diode DHAnd DLElectric power field effect transistor MOSFET, semiconductor switch SHAnd SLGate pole be respectively endpoint a and b, SLDrain electrode be endpoint e, SHSource electrode be endpoint c, SHDrain electrode and SLSource electrode and inductance L0One end be connected, inductance L0The other end be endpoint d；The endpoint 1~3 of binodal battery cell DBs is separately connected equalizing circuit EC0C~e of endpoint.The present invention can greatly promote the safety of battery pack stable operation, be also beneficial to reduce cost of investment.
Description
Technical field
The present invention relates to a kind of Li-ion batteries piles circuit, especially a kind of low loss series Li-ion batteries piles electricity is equal
Weigh circuit.
Background technique
Currently, lithium ion battery is widely used in the fields such as electric car, generation of electricity by new energy, backup power source, it has
Power density is high, without memory, self discharge is few and the remarkable advantages such as lighter in weight.The voltage of monomer lithium ion battery and storage
Ability is lower, generally using it is multiple it is series-parallel by the way of constitute battery pack, with obtain needed for grade voltage and capacity.Due to
Different li-ion chemistries or other speciality it is inconsistent, cause in series arm battery cell to be charged and discharged different
It causes, percentage of batteries monomer occurs and overcharge or the phenomenon that over-discharge, the excessively thermotropic combustion of battery pack, or even explosion can be caused when serious.Therefore,
Cascaded lithium ion batteries group electric quantity balancing problem is the safe and stable critical issue with efficient operation of relationship battery.
Summary of the invention
The present invention proposes a kind of low loss series equalizing circuit of lithium ion battery pack, based on the real-time prison to each battery cell
It surveys, and respectively under charging, electric discharge and idle state, the medium stored using inductance as electric energy realizes each single battery
Dynamic equalization.Compared with prior art, above-mentioned equalizing circuit uses modularization management, simple structure, convenient control and electricity is equal
It is zero loss on weighing apparatus procedural theory, the safety of battery pack stable operation can be greatly promoted, is also beneficial to reduce cost of investment.
The technical scheme adopted by the invention is that:
A kind of low loss series Li-ion batteries piles electric quantity balancing circuit unit, including binodal battery cell DBs and equilibrium
Circuit EC0Two parts, binodal battery cell DBs is by two battery cell BHAnd BLIt constitutes, enables battery cell BHJust extremely hold
Point 1, battery cell BLCathode be endpoint 3, and battery cell BHCathode and battery cell BLAnode be connected, junction is
Endpoint 2.
Equalizing circuit EC0By inductance L0, two groups of semiconductor switch SHAnd SLComposition, semiconductor switch SH、SLRespectively band is anti-
Parallel diode DHWith anti-paralleled diode DLElectric power field effect transistor MOSFET；
Semiconductor switch SHAnd SLGate pole be respectively endpoint a and endpoint b；
Semiconductor switch SLSource electrode be endpoint e, semiconductor switch SHDrain electrode be endpoint c；
Semiconductor switch SHSource electrode respectively with semiconductor switch SLDrain electrode, inductance L0One end is connected, inductance L0It is another
End is endpoint d；
Endpoint 1, endpoint 2, the endpoint 3 of binodal battery cell DBs is separately connected equalizing circuit EC0Endpoint c, endpoint d, end
Point e.
A kind of low loss series Li-ion batteries piles electric quantity balancing expanded circuit includes multiple equalizing circuit units, specifically
Extended mode are as follows: enabling equalizing circuit unit first is 0 grade of expanded circuit, includes one group of binodal battery cell DBs and equalizing circuit
EC0；
Then 1 grade of expanded circuit includes two groups of 0 grade of expanded circuits and an equalizing circuit EC1, equalizing circuit EC1With balanced electricity
Road EC0Difference be inductance be L1, the binodal battery cell DBs in two groups of 0 grade of expanded circuits is connected, tie point is again and
Weigh circuit EC1Endpoint d be connected, equalizing circuit EC1In endpoint c and endpoint e meet aforementioned series connection binodal battery cell DBs respectively
Anode and cathode；
So analogize, k grades of expanded circuits include two groups of k-1 grades of expanded circuits and an ECk, inductance Lk, k-1 grades of extensions
In circuit binodal battery cell DBs series connection, tie point again with equalizing circuit ECkEndpoint d be connected, equalizing circuit ECkEndpoint
C and endpoint e connects the anode and cathode of aforementioned series connection DBs respectively.
A kind of low loss series Li-ion batteries piles electric quantity balancing method, works as BHIn electricity be higher than BLWhen, it is control with T
Period controls SHConducting, pulsewidth DT, D are duty ratio, specific balancing procedure are as follows: under charged state, make BLPreferential charging, to two
Person's electricity quite makes SHIt is held off, restores to charge normal；Under discharge condition, B is reducedLDischarge capacity makes when the two electricity is suitable
SHIt is held off, restores regular picture；Under idle state, using reactor as medium, by BHMiddle part electricity is transferred to BLIn, to
The two electricity makes S when suitableHIt is held off, stops balanced.
A kind of low loss series Li-ion batteries piles electric quantity balancing method, works as BHMiddle electricity is lower than BLWhen, it is control week with T
Phase controls SLConducting, pulsewidth is DT (D is duty ratio), specific balancing procedure are as follows: under charged state, make BHPreferential charging, to two
Person's electricity quite makes SLIt is held off, restores to charge normal；Under discharge condition, B is reducedHDischarge capacity makes when the two electricity is suitable
SLIt is held off, restores regular picture；Under idle state, using reactor as medium, by BLMiddle part electricity is transferred to BHIn, to
The two electricity makes S when suitableLIt is held off, stops balanced.
A kind of low loss series Li-ion batteries piles electric quantity balancing development method, under charging and idle state, by 0,1 ..., n
Grade circuit sequence is balanced step by step；In the discharged condition, to avoid output voltage from dropping, limiter stage equalization is taken, i.e., only carries out 0
The size of~j grades of circuit conditioning, j is determined by voltage security fluctuation range.
A kind of low loss series Li-ion batteries piles electric quantity balancing development method, enabling highest is n grades, then contains 2 altogether(n+1)A electricity
Pond is monomer series-connected, which meets maximum output voltage requirement；It, need to be by the series connection of m group in order to meet maximum power requirement
Branch circuit parallel connection.
A kind of low loss series Li-ion batteries piles electric quantity balancing circuit of the present invention, for cascaded lithium ion batteries group electricity
Equalization problem provides a kind of novel low-power consumption equalization scheme, and compared with traditional equalizing circuit, major advantage includes following
Three aspects:
(1): electric energy being transmitted using reactor, does not generate any energy loss, system heat generation is few, high safety and reliability；
(2): equalizing circuit cellular construction is simple, and circuit extension method is simple, is easily obtainable cascaded lithium ion batteries
The balanced expanded circuit of group, practicability are stronger；
(3): the equalizing circuit control is simple, and at low cost, feasibility is stronger.
Detailed description of the invention
Fig. 1 (a) is equalizing circuit element circuit figure of the invention.
Fig. 1 (b) is expanded circuit figure of the invention.
Fig. 2 (a) is the balancing procedure figure of the present invention in the charge state；
Fig. 2 (b) is the balancing procedure figure of the present invention in the discharged condition；
Fig. 2 (c) is the balancing procedure figure of the present invention in an idle state.
Fig. 3 (a) is the situation of change schematic diagram of battery capacity under different switch states of the invention, different working condition.
Fig. 3 (b) is the situation of change chart of battery capacity under different switch states of the invention, different working condition.
Fig. 4 is k grade expanded circuit balancing procedure flow chart of the invention.
Specific embodiment
A kind of low loss series Li-ion batteries piles electric quantity balancing circuit, including equalizing circuit unit and balanced expanded circuit
Two kinds, the latter is superimposed by the former to be extended；For above two circuit, corresponding control method is proposed respectively.Specifically such as
Under:
(1), equalizing circuit unit includes binodal battery cell DBs and equalizing circuit EC0Two parts, DBs is by two electricity
Pond monomer BHAnd BLIt constitutes, enables BHJust extremely endpoint 1, BLCathode be endpoint 3, and BHCathode and BLAnode be connected, even
Meeting place is endpoint 2；EC0By two groups of semiconductor switch (SHAnd DH、SLAnd DL) and inductance (L0) composition, semiconductor switch (SHAnd SL)
For band anti-paralleled diode (DHAnd DL) electric power field effect transistor (MOSFET), SHAnd SLGate pole be respectively endpoint a and end
Point b, SLDrain electrode be endpoint e, SHSource electrode be endpoint c, SHDrain electrode and SLSource electrode and L0One end be connected, L0The other end
For endpoint d；DBs endpoint 1~3 is separately connected EC0Endpoint c~e.
(2), balanced expanded circuit includes multiple equalizing circuit units, specific extended mode are as follows: enable equalizing circuit list first
Member is 0 grade of expanded circuit, includes one group of DBs+EC0；Then 1 grade of expanded circuit includes 0 grade of expanded circuit and an EC1, EC1With EC0
Difference be inductance be L1, by 0 grade of expanded circuit two DBs connect, tie point again with EC1Endpoint d be connected, EC1In
Endpoint c and endpoint e connects the anode and cathode of aforementioned series connection DBs respectively；As before, k grades of expanded circuits include k-1 grade expanded circuits with
One ECk(inductance Lk), two groups of DBs series connection in k-1 grades of expanded circuits, tie point again with ECkEndpoint d be connected, ECk's
Endpoint c and endpoint e connects the anode and cathode of aforementioned series connection DBs respectively.
(3), for circuit unit described in (1), work as BHIn electricity be higher than BLWhen, it is the control period with T, controls SHIt leads
Logical, pulsewidth is DT (D is duty ratio), specific balancing procedure are as follows: under charged state, make BLPreferential charging, it is suitable to the two electricity
Make SHIt is held off, restores to charge normal；Under discharge condition, B is reducedLDischarge capacity makes S when the two electricity is suitableHIt keeps closing
It is disconnected, restore regular picture；Under idle state, using reactor as medium, by BHMiddle part electricity is transferred to BLIn, to the two electricity
Make S when quiteHIt is held off, stops balanced.
(4), for circuit unit described in (1), work as BHMiddle electricity is lower than BLWhen, it is the control period with T, controls SLConducting,
Pulsewidth is DT (D is duty ratio), specific balancing procedure are as follows: under charged state, make BHPreferential charging, quite makes S to the two electricityL
It is held off, restores to charge normal；Under discharge condition, B is reducedHDischarge capacity makes S when the two electricity is suitableLIt is held off, it is extensive
Multiple regular picture；Under idle state, using reactor as medium, by BLMiddle part electricity is transferred to BHIn, when the two electricity is suitable
Make SLIt is held off, stops balanced.
(5), for equilibrium expanded circuit described in (2), under charging and idle state, by 0,1 ..., n grades of circuit sequences by
Grade is balanced, for k grades of circuits, detailed process are as follows: work as BHIn electricity be higher than BLWhen, it is the control period with T, controls SHConducting, arteries and veins
Width is DT (D is duty ratio), under charged state, makes B thereinLPreferential charging, after the two electricity quite afterwards make SHIt is held off,
Recovery charges normal or enters k+1 grades of circuit conditionings；Under idle state, using reactor as medium, by BHMiddle part electricity transfer
To BLIn, make S when the two electricity is suitableHIt is held off, stops equilibrium, into k+1 grades of circuit conditionings；In the discharged condition, it is
It avoids output voltage from dropping, takes limiter stage equalization, i.e., only carry out 0~j grades of circuit conditionings, the size of j is by voltage security wave
Dynamic range determines, for k grades of circuits, detailed process are as follows: work as BHIn electricity be higher than BLWhen, it is the control period with T, controls SHIt leads
Logical, pulsewidth is DT (D is duty ratio), reduces wherein BLDischarge capacity makes S when the two electricity is suitableHIt is held off, restores normal
Electric discharge enters k+1 grades of circuit conditionings.
(6), the balanced expanded circuit in above-mentioned (2), enabling highest is n grades, then contains 2 altogether(n+1)A battery cell series connection, should
Series arm meets maximum output voltage requirement；It, need to be by the series arm parallel connection of m group in order to meet maximum power requirement.Work
Principle:
A kind of low loss series equalizing circuit of lithium ion battery pack proposed by the present invention, as shown in Fig. 1 (a), for balanced electricity
Road element circuit figure is expanded circuit structure chart as shown in Fig. 1 (b).Equalizing circuit unit include binodal battery pack DBs and
Weigh circuit EC0, DBs is by battery cell BHAnd BLIt is in series, BHJust extremely endpoint 1, BLCathode be endpoint 2, the two connection
Point is endpoint 3；EC0By two groups of MOSFET (S containing anti-paralleled diodeHAnd DH、SLAnd DL) and inductance L0Composition, SHAnd SLDoor
Pole is respectively endpoint a and b, SLDrain electrode be endpoint e, SHSource electrode be endpoint c, SHDrain electrode and SLSource electrode and L0One end phase
Even, L0The other end be endpoint d；DBs endpoint 1~3 is separately connected EC0Endpoint c~e.
The course of work for considering equalizing circuit unit, is divided into Q by two electric quantity of single batteries relationshipsBH>QBLAnd QBH<QBLTwo kinds
Situation, respectively shows the balancing procedure under charging, electric discharge and idle three kinds of states in Fig. 2 (a)~Fig. 2 (c), and Fig. 3 (a)~
Fig. 3 (b) is under different switch state different working conditions, and the situation of change of battery capacity is specifically described as follows:
Work as QBH>QBLWhen, control SHUsing pulsewidth DT (for D as duty ratio, T is the control period) conducting, if charging current is ICS,
Reactor current is IL, load current ILoad, single battery electric current is IBHAnd IBL, balancing procedure when different working condition
Are as follows: under charged state, as shown in Fig. 2 (a), SHConducting, makes IBH=0 and IBL=ICS=IL, SHShutdown, makes IBH=ICSAnd IBL=
IBH+IL, it is seen that BLCharge volume in one cycle is more than BH, after a period of time, the two electricity is suitable, EC0It stops working；It puts
Under electricity condition, as shown in Fig. 2 (b), SHConducting, makes IBL=ILoadAnd IBH=IBL+IL, SHShutdown, makes IBH=ILoadAnd IBL=IBH-
IL, it is seen that BLDischarge capacity in one cycle is less than BH, after a period of time, the two electricity is suitable, EC0It stops working；Idle shape
Under state, as shown in Fig. 2 (c), SHConducting, makes IBL=0 and IBH=IL, SHShutdown, makes IBH=0 and IBL=IL, it is seen that BHIn portion
Electricity is divided to be transferred to B through inductanceL, after the two electricity quite after, EC0It stops working.
Work as QBH<QBLWhen, control SLUsing pulsewidth DT (for D as duty ratio, T is the control period) conducting, if charging current is ICS,
Reactor current is IL, load current ILoad, single battery electric current is IBHAnd IBL, balancing procedure when different working condition
Are as follows: under charged state, as shown in Fig. 2 (a), SLConducting, makes IBL=0 and IBH=ICS=IL, SLShutdown, makes IBL=ICSAnd IBH=
IBL+IL, it is seen that BHCharge volume in one cycle is more than BL, after a period of time, the two electricity is suitable, EC0It stops working；It puts
Under electricity condition, as shown in Fig. 2 (b), SLConducting, makes IBH=ILoadAnd IBL=IBH+IL, SLShutdown, makes IBL=ILoadAnd IBH=IBL-
IL, it is seen that BHDischarge capacity in one cycle is less than BL, after a period of time, the two electricity is suitable, EC0It stops working；Idle shape
Under state, as shown in Fig. 2 (c), SLConducting, makes IBH=0 and IBL=IL, SLShutdown, makes IBL=0 and IBH=IL, it is seen that BLIn portion
Electricity is divided to be transferred to B through inductanceH, after the two electricity quite after, EC0It stops working.
In conclusion the basic ideas of the balancing procedure are as follows: when charging, the preferential battery charging low to electricity, to the two
Electricity quite stops balanced, common charging afterwards；When electric discharge, the battery discharge for preferentially making electricity high, after the two electricity quite afterwards stop
It is only balanced, it is common to discharge；When idle, part electricity is passed to the low battery of electricity by inductance by the high battery of electricity；Ignore
Line resistance, since inductance does not consume energy, so the equalizing circuit can theoretically realize zero loss.
Consider further that the course of work of balanced expanded circuit, equalization methods are roughly the same with above-mentioned basic ideas, expand with k grades
For opening up circuit, it includes an ECkBalanced electricity is compared as shown in the functional block diagram of Fig. 1 (b) with two k-1 grades of expanded circuits
Road unit, ECkEC can be regarded as0, two k-1 grades of expanded circuits can regard B asHAnd BL；It is charging under idle state, k grades of extensions are electric
Road and the balancing procedure of 0 grade of expanded circuit are just the same, and specific steps are as shown in Figure 4；In the discharged condition, electric to avoid exporting
Pressure is dropped, and is taken limiter stage equalization, i.e., is only carried out 0~j grades of circuit conditionings (or n=j in Fig. 4), the size of j is pacified by voltage
Full fluctuation range determines that, if scope range of the fluctuation of voltage is 8V, each monomer battery voltage is 1V, then desirable 3 j.
Claims (2)
1. using a kind of battery electric quantity equilibrium extended method of low loss series Li-ion batteries piles electric quantity balancing expanded circuit,
It is characterized by: the expanded circuit includes multiple equalizing circuit units, the equalizing circuit unit includes binodal battery cell
DBs and equalizing circuit EC0Two parts, binodal battery cell DBs is by two battery cell BHAnd BLIt constitutes, enables battery cell BH
Just extremely endpoint 1, battery cell BLCathode be endpoint 3, and battery cell BHCathode and battery cell BLPositive phase
Even, junction is endpoint 2；
Equalizing circuit EC0By inductance L0, two groups of semiconductor switch SHAnd SLComposition, semiconductor switch SH、SLRespectively band inverse parallel
Diode DHWith anti-paralleled diode DLElectric power field effect transistor MOSFET；
Semiconductor switch SHAnd SLGate pole be respectively endpoint a and endpoint b；
Semiconductor switch SLSource electrode be endpoint e, semiconductor switch SHDrain electrode be endpoint c；
Semiconductor switch SHSource electrode respectively with semiconductor switch SLDrain electrode, inductance L0One end is connected, inductance L0The other end be
Endpoint d；
The endpoint 1 and equalizing circuit EC of binodal battery cell DBs0Endpoint c be connected, the endpoint 2 of binodal battery cell DBs and
Weigh circuit EC0Endpoint d be connected, the endpoint 3 of binodal battery cell DBs and equalizing circuit EC0Endpoint e be connected；
Extended mode are as follows: enabling equalizing circuit unit first is 0 grade of expanded circuit, includes one group of binodal battery cell DBs and equilibrium
Circuit EC0；
Then 1 grade of expanded circuit includes two groups of 0 grade of expanded circuits and an equalizing circuit EC1, equalizing circuit EC1With equalizing circuit EC0
Difference be inductance be L1, by two groups of 0 grade of expanded circuits binodal battery cell DBs connect, tie point again with it is balanced electricity
Road EC1Endpoint d be connected, equalizing circuit EC1In endpoint c and endpoint e meeting aforementioned series connection binodal battery cell DBs respectively just
Pole and cathode；
Then 2 grades of expanded circuits include two groups of 1 grade of expanded circuits and an equalizing circuit EC2, equalizing circuit EC2With equalizing circuit EC1
Difference be inductance be L2, by two groups of 1 grade of expanded circuits binodal battery cell DBs connect, tie point again with it is balanced electricity
Road EC2Endpoint d be connected, equalizing circuit EC2In endpoint c and endpoint e meeting aforementioned series connection binodal battery cell DBs respectively just
Pole and cathode；
So analogize, k grades of expanded circuits include two groups of k-1 grades of expanded circuits and an equalizing circuit ECk, inductance Lk, k-1 grades
In expanded circuit binodal battery cell DBs series connection, tie point again with equalizing circuit ECkEndpoint d be connected, equalizing circuit ECk's
Endpoint c and endpoint e connects the anode and cathode of aforementioned series connection binodal battery cell DBs respectively；
Under charging and idle state, by 0,1 ..., n grades of circuit sequences are balanced step by step；In the discharged condition, to avoid output voltage
It drops, takes limiter stage equalization, i.e., only carry out 0~j grades of circuit conditionings, the size of j is determined by voltage security fluctuation range.
2. using a kind of battery electric quantity equilibrium extended method of low loss series Li-ion batteries piles electric quantity balancing expanded circuit,
It is characterized by: the expanded circuit includes multiple equalizing circuit units, the equalizing circuit unit includes binodal battery cell
DBs and equalizing circuit EC0Two parts, binodal battery cell DBs is by two battery cell BHAnd BLIt constitutes, enables battery cell BH
Just extremely endpoint 1, battery cell BLCathode be endpoint 3, and battery cell BHCathode and battery cell BLPositive phase
Even, junction is endpoint 2；
Equalizing circuit EC0By inductance L0, two groups of semiconductor switch SHAnd SLComposition, semiconductor switch SH、SLRespectively band inverse parallel
Diode DHWith anti-paralleled diode DLElectric power field effect transistor MOSFET；
Semiconductor switch SHAnd SLGate pole be respectively endpoint a and endpoint b；
Semiconductor switch SLSource electrode be endpoint e, semiconductor switch SHDrain electrode be endpoint c；
Semiconductor switch SHSource electrode respectively with semiconductor switch SLDrain electrode, inductance L0One end is connected, inductance L0The other end be
Endpoint d；
The endpoint 1 and equalizing circuit EC of binodal battery cell DBs0Endpoint c be connected, the endpoint 2 of binodal battery cell DBs and
Weigh circuit EC0Endpoint d be connected, the endpoint 3 of binodal battery cell DBs and equalizing circuit EC0Endpoint e be connected；
Extended mode are as follows: enabling equalizing circuit unit first is 0 grade of expanded circuit, includes one group of binodal battery cell DBs and equilibrium
Circuit EC0；
Then 1 grade of expanded circuit includes two groups of 0 grade of expanded circuits and an equalizing circuit EC1, equalizing circuit EC1With equalizing circuit EC0
Difference be inductance be L1, by two groups of 0 grade of expanded circuits binodal battery cell DBs connect, tie point again with it is balanced electricity
Road EC1Endpoint d be connected, equalizing circuit EC1In endpoint c and endpoint e meeting aforementioned series connection binodal battery cell DBs respectively just
Pole and cathode；
Then 2 grades of expanded circuits include two groups of 1 grade of expanded circuits and an equalizing circuit EC2, equalizing circuit EC2With equalizing circuit EC1
Difference be inductance be L2, by two groups of 1 grade of expanded circuits binodal battery cell DBs connect, tie point again with it is balanced electricity
Road EC2Endpoint d be connected, equalizing circuit EC2In endpoint c and endpoint e meeting aforementioned series connection binodal battery cell DBs respectively just
Pole and cathode；
So analogize, k grades of expanded circuits include two groups of k-1 grades of expanded circuits and an equalizing circuit ECk, inductance Lk, k-1 grades
In expanded circuit binodal battery cell DBs series connection, tie point again with equalizing circuit ECkEndpoint d be connected, equalizing circuit ECk's
Endpoint c and endpoint e connects the anode and cathode of aforementioned series connection binodal battery cell DBs respectively；
Enabling highest is n grades, then contains 2 altogether(n+1)A battery cell series connection, this contains 2(n+1)The series arm of a battery cell meets most
Big output voltage requirement；It, need to be by the series arm parallel connection of m group in order to meet maximum power requirement.
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| CN110323803B (en) * | 2019-06-21 | 2023-01-06 | 三峡大学 | Multiphase interleaved converter suitable for series lithium ion battery pack |
| CN111064248A (en) * | 2019-12-24 | 2020-04-24 | 湖州师范学院 | Balanced control circuit of series lithium ion battery pack |
| CN113629814B (en) * | 2021-08-13 | 2023-05-02 | 傲普(上海)新能源有限公司 | Battery voltage equalization circuit, method and device and energy storage system |
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| CN105162200A (en) * | 2015-09-15 | 2015-12-16 | 华南理工大学 | Layered battery pack balancing circuit |
| CN105529777A (en) * | 2016-01-28 | 2016-04-27 | 华南理工大学 | 2n battery pack equalizing circuit easy to expand |
| CN205911798U (en) * | 2016-08-17 | 2017-01-25 | 三峡大学 | Electric quantity equalizer circuit of low -loss series connection lithium ion battery group unit and expander circuit thereof |
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| CN106100072A (en) | 2016-11-09 |
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Effective date of registration: 20210326 Address after: 444100 Huancheng South Road, Yuyang office, Dangyang city, Yichang City, Hubei Province Patentee after: Hubei Yidian Electric Co.,Ltd. Address before: 443002 No. 8, University Road, Yichang, Hubei Patentee before: CHINA THREE GORGES University |
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Denomination of invention: A low loss series lithium-ion battery pack power balance circuit Effective date of registration: 20230830 Granted publication date: 20191108 Pledgee: Dangyang Guotou Financing Guarantee Co.,Ltd. Pledgor: Hubei Yidian Electric Co.,Ltd. Registration number: Y2023980054475 |