CN106602647A - Two-way nondestructive equalization circuit of parallel battery packs based on capacitive energy storage - Google Patents
Two-way nondestructive equalization circuit of parallel battery packs based on capacitive energy storage Download PDFInfo
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- CN106602647A CN106602647A CN201611152764.8A CN201611152764A CN106602647A CN 106602647 A CN106602647 A CN 106602647A CN 201611152764 A CN201611152764 A CN 201611152764A CN 106602647 A CN106602647 A CN 106602647A
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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
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a two-way nondestructive equalization circuit of parallel battery packs based on capacitive energy storage. The parallel battery packs consist of a left battery pack and a right battery pack. The head and tail ends of the parallel battery packs are between VCC and GND, the left battery pack and the right battery pack are connected by an equalization circuit in the middle, and the equalization circuit is further connected with a control circuit. If there is power imbalance between the batteries in the left and right battery packs, by controlling on-off of a triode AC semiconductor switch TRIAC and the energy storage function of an energy storage capacitor in the equalization circuit, the power of one battery pack can be transferred to the batteries in the other battery pack, and one battery pack can get energy from the other battery pack. Through the circuit, dynamic equalization in the process of charge and discharge of battery packs is realized, the phenomenon of battery pack imbalance is improved, the available capacity of battery packs is improved, the maintenance and replacement cycle of battery packs is reduced, and the service life of battery packs is extended. Therefore, the circuit is applicable to the battery management system of an energy storage device in a hybrid vehicle, a pure electric vehicle or a pumped storage power station.
Description
Technical field
The present invention relates to the technical field of battery pack balancing, and in particular to a kind of batteries in parallel connection group based on capacitance energy storage is double
To non-dissipative equalizing circuit.
Background technology
After multiple charge and discharge cycles, the distribution of the residual capacity of each battery cell substantially occurs three kinds to set of cells
Situation：The residual capacity of some battery cells is higher；The residual capacity of some battery cells is low；The residue of some battery cells
Capacity is higher and some battery cells residual capacities are low.
For above-mentioned three kinds of situations, Chinese scholars propose the solution of oneself.Individual cells monomer is directed to such as
The higher situation of residual capacity, have researcher to propose parallel resistance shunting, it will by controlling corresponding switching device
The energy of the higher battery module of residual capacity is fallen by resistance consumption, and energy is wasted by the method, and in equilibrium
During generate substantial amounts of heat, increased the load of battery thermal management.Also have researcher propose bi-directional DC-DC equalization,
The equalizing circuits such as coaxial transformer equalization, these circuits all employ transformator, increased the cost of equalizing circuit.
The method of current Li-ion batteries piles Balance route, according to Expenditure Levels of the circuit in balancing procedure to energy, can
It is divided into two big class of energy-dissipating and energy non-dissipative type；According to equalization function classify, can be divided into charge balancing, equalization discharge and
Dynamic equalization.Charge balancing refers to the equilibrium in charging process, usually opens when batteries monomer voltage reaches setting value
Begin balanced, overcharge is prevented by reducing charging current；Equalization discharge refers to the equilibrium in discharge process, by residual energy
The low battery cell of amount supplements energy to prevent overdischarge；Dynamic equalization mode combines the excellent of charge balancing and equalization discharge
Point, refers to the equilibrium carried out to set of cells in whole charge and discharge process.
The content of the invention
The invention aims to solve drawbacks described above of the prior art, there is provided a kind of parallel connection based on capacitance energy storage
The two-way non-dissipative equalizing circuit of set of cells, is ensured by a kind of equalizing circuit is adopted in the battery management system of batteries in parallel connection group
Monomer in set of cells occurs without overcharge and overdischarge during charging and discharging, improves the unbalanced phenomenon of set of cells,
The active volume of set of cells is improved, is reduced maintenance and the replacement cycle of set of cells, is extended the service life of set of cells, reduce mixing
The operating cost of power vehicle, electric automobile and storage station.
The purpose of the present invention can be reached by adopting the following technical scheme that：
The two-way non-dissipative equalizing circuit of a kind of batteries in parallel connection group based on capacitance energy storage, in charging process, when set of cells
When any one or multiple continuous battery monomer energy of left half are too high (in Fig. 1 and Fig. 2 (a), battery Bl1With battery
Bl2It is continuous battery cell, battery Bl1With battery Bl2With battery Bl3It is continuous battery cell.That is the left half of set of cells
In, one or more battery cell of arbitrary continuation, the present invention are known as continuous battery, can just fit in balancing procedure
Locality is considered as an entirety.The definition of the continuous battery of right half of set of cells is in the same manner), can be by one or more continuous energy
The too high monomer of amount is considered as an entirety, and this overall balancing energy is given this overall corresponding right half set of cells
Into entirety, (in Fig. 1 and Fig. 2 (a), the battery B of left halfl1Corresponding is the battery B of right halfr1, the battery B of left halfl1
And Bl2It is right half battery B that the entirety of composition is correspondingr1And Br2The entirety of composition.I.e. one of the arbitrary continuation of left half or
The entirety of person's multiple battery cells composition, corresponding is that right half is in parallel with the entirety same or multiple continuous electric capacity
The entirety of battery composition, the definition of continuous electric capacity are identical with the definition of continuous battery.The corresponding left half of battery of right half
Battery definition in the same manner)；The balancing principle of right half is with left half in the same manner.
In discharge process, when one or more continuous battery monomer energy of the left half of set of cells are too low, can be with
One or more energy too low monomer is considered as into an entirety.When the electricity of the corresponding right half of the too low entirety of this energy
When pond energy will not be too low, can be connected by the battery of too low with this energy entirety corresponding right half and with these batteries
The balancing energy of continuous any battery combination gives this energy too low entirety.When the corresponding right part of the too low entirety of this energy
Point the energy content of battery it is also too low when, it is necessary to equilibrium is realized by two steps, it is first by the energy of left half high one or many
Battery of the balancing energy of individual continuous battery cell to right half, improves the voltage of the battery of right half, then by above-mentioned
The method of equalization discharge carries out equilibrium.The balancing principle of right half is with left half in the same manner.
The two-way non-dissipative equalizing circuit of the batteries in parallel connection group is made up of batteries in parallel connection group, equalizing circuit, control circuit.Wherein,
Batteries in parallel connection group is divided into left and right two parts, and left half battery cell is left set of cells, and right half battery cell is right battery
Group；Assume that battery cell sum is 2n (n is positive integer), left-right parts battery cell number is n；Left battery cell monomer from
B is respectively designated as up to downl1、Bl2、Bl3、……Bln, right battery cell monomer is respectively designated as B from top to bottomr1、Br2、
Br3、……Brn；Bl1Positive pole meet VCC, Br1Negative pole meet GND；Number of batteries is not limited, but upper with number of batteries
Rise, Balance route can accordingly become complicated, and the switching frequency of bidirectional triode thyristor TRIAC may not reach requirement, to storage capacitor
Requirement also accordingly can improve, should be selected according to practical situation.Hypothesis number of batteries is 2n (n is positive integer), balanced
Storage capacitor C quantity in circuit is n, is from top to bottom respectively designated as C1、C2……Cn；It is two-way controllable with the quantity such as electric capacity
Silicon TRIAC is connected in parallel on electric capacity two ends, and remaining bidirectional triode thyristor TRIAC one end is connected with one end of storage capacitor C, the other end and
One end of battery is connected, and the control end of bidirectional triode thyristor TRIAC is connected with control circuit, makes opening for bidirectional triode thyristor TRIAC
Logical and shut-off is by control circuit control；The quantity of bidirectional triode thyristor TRIAC be 3n+2, bidirectional triode thyristor in parallel with electric capacity by upper
S is respectively designated as under1、S2……Sn, the bidirectional triode thyristor being connected with left set of cells is from top to bottom respectively designated as Sl1、
Sl2……Sl(n+1), the bidirectional triode thyristor being connected with right set of cells is from top to bottom respectively designated as Sr1、Sr2……Sr(n+1)；Electricity
Pond monomer Bl1Positive pole meet VCC, battery cell Br1Negative pole meet GND.Control circuit in Fig. 1 includes microcontroller and all pairs
To the drive circuit of controllable silicon TRIAC, by the microcontroller programming in control circuit, analyzing the electricity of present battery simultaneously
Calculating should be using which kind of control strategy come equalizing circuit；By the drive circuit in control circuit, can give two-way controllable
The gate pole of silicon TRIAC provides appropriate driving voltage or shut-off voltage, allows bidirectional triode thyristor TRIAC to open according to actual demand
Or close, reaching carries out purpose in a balanced way to battery electric quantity.
The operation principle of equalizing circuit is as follows：
When number of batteries is 2n, such as Fig. 1, in charging process, if continuous several batteries in left set of cells are all
For terminal voltage highest, the entirety that can be constituted these batteries is while carry out equalization discharge.Assume that these batteries are Bli、
Bl(i+1)……Bl(i+w)(quantity of these batteries is at most equal to all batteries of left set of cells, the i.e. maximum of w for n-1, and w is big
In equal to 0).In order to avoid to Bli、Bl(i+1)……Bl(i+w)Overcharge, in a PWM cycle, makes bidirectional triode thyristor
TRIACSliAnd Sl(i+w+1)Conducting, then electric current is by Sli, storage capacitor Ci、Ci+1……Ci+w、Sl(i+w+1)And Bl(i+w)、
Bl(i+w-1)……Bli, Bli、Bl(i+1)……Bl(i+w)Discharge for electric capacity Ci、Ci+1……Ci+wThe overall storage energy of composition；With electricity
Pond Bli、Bl(i+1)……Bl(i+w)Corresponding battery is Bri、Br(i+1)……Br(i+w), SliAnd Sl(i+w+1)Make after opening certain hour
Its shut-off, while opening SriAnd Sr(i+w+1), now electric current is by electric capacity Ci+w、Ci+w-1……Ci、Sri, battery Bri、Br(i+1)……
Br(i+w)And Sr(i+w+1), electric capacity Ci、Ci+1……Ci+wRelease energy to Bri、Br(i+1)……Br(i+w), energy is realized from Bli、
Bl(i+1)……Bl(i+w)To Bri、Br(i+1)……Br(i+w)Transfer.In charging process, if continuous some in right set of cells
Individual battery is all terminal voltage highest, and balancing principle is identical with left set of cells.
When number of batteries is 2n, such as Fig. 1, in discharge process, if continuous several batteries in left set of cells are all
Minimum for terminal voltage, the entirety that can be constituted these batteries is while carry out equalization discharge.Assume that these batteries are Bli、
Bl(i+1)……Bl(i+w)(quantity of these batteries is at most equal to all batteries of left set of cells, the i.e. maximum of w for n-1, and w is big
In equal to 0).Assume and battery Bli、Bl(i+1)……Bl(i+w)Corresponding battery is Bri、Br(i+1)……Br(i+w), work as Bri、
Br(i+1)……Br(i+w)When the integral energy for being constituted will not be too low, by certain rule judgment, with Bri、Br(i+1)……
Br(i+w)Continuous certain battery can be integrally Bli、Bl(i+1)……Bl(i+w)Energy is provided.Assume that this overall battery is
Br(i-p)、Br(i-p+1)……Br(i+q+w)(maximum of the sum of p+q+w is n-1, and 0) p is more than or equal to more than or equal to 0, q, then open-minded
Sr(i-p)And Sr(i+q+w+1), while opening Si-p、Si-p+1……Si+q+w+1Middle removing Si、Si+1……Si+wIt is remaining in parallel with electric capacity
Bidirectional triode thyristor.Now electric current passes through Sr(i-p), electric capacity Ci、Ci+1……Ci+w、Sr(i+q+w+1), battery Br(i+q+w)、
Br(i+q+w-1)……Br(i-p)And Si-p、Si-p+1……Si+q+w+1Middle removing Si、Si+1……Si+wIt is remaining in parallel with electric capacity two-way
Controllable silicon, Br(i-p)、Br(i-p+1)……Br(i+q+w)Discharge for electric capacity Ci、Ci+1……Ci+wThe overall storage energy of composition；Sr(i-p)
And Sr(i+q+w+1)And Si-p、Si-p+1……Si+q+w+1Middle removing Si、Si+1……Si+wThe remaining bidirectional triode thyristor in parallel with electric capacity
Turn off after opening a period of time, while opening SliAnd Sl(i+w+1), then electric current is by storage capacitor Ci+w、Ci+w-1……Ci、Sli、
Bli、Bl(i+1)……Bl(i+w)And Sl(i+w+1), electric capacity Ci、Ci+1……Ci+wRelease energy to Bri、Br(i+1)……Br(i+w), it is real
Energy is showed from Br(i-p)、Br(i-p+1)……Br(i+q+w)To Bri、Br(i+1)……Br(i+w)Transfer.Work as Bri、Br(i+1)……
Br(i+w)When the integral energy that constituted is too low, the battery first passed through in left set of cells integrally charges for right set of cells, improves Bri、
Br(i+1)……Br(i+w)Energy, then carry out equalization discharge by the way.In discharge process, if the company in right set of cells
Several continuous batteries are all that terminal voltage is minimum, and balancing principle is identical with left set of cells.
The present invention is had the following advantages relative to prior art and effect：
The present invention is due to adopting above-mentioned dynamic nondestructive cell balancing, left and right in batteries in parallel connection Battery pack management system
If the aneroid battery of set of cells is if there is the unbalanced phenomenon of electricity, by controlling bidirectional triode thyristor TRIAC in equalizing circuit
Break-make is acted on the energy storage of storage capacitor, electricity can be passed to the battery of another set of cells, it is also possible to from another set of cells
Energy is obtained, improves the unbalanced phenomenon of set of cells, improve the active volume of set of cells, extend the service life of set of cells, drop
The cost of energy-storage system of accumulator in low hybrid vehicle, electric automobile and power station.
Description of the drawings
Fig. 1 is the circuit theory of the two-way non-dissipative equalizing circuit of the batteries in parallel connection group based on capacitance energy storage disclosed in the present invention
Figure；
Fig. 2 (a) is the course of work schematic diagram that electric capacity charges in charging process by taking 4 batteries as an example；
Fig. 2 (b) is the course of work schematic diagram of electric capacity electric discharge in charging process by taking 4 batteries as an example；
Fig. 3 (a) is the course of work schematic diagram that electric capacity charges in discharge process by taking 4 batteries as an example；
Fig. 3 (b) is the course of work schematic diagram of electric capacity electric discharge in discharge process by taking 4 batteries as an example；
Fig. 4 is the voltage oscillogram of each battery cell in equalizing circuit charging emulation experiment by taking 4 batteries as an example；
Fig. 5 be by taking 4 batteries as an example equalizing circuit electric discharge emulation experiment in each battery cell voltage oscillogram.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention, rather than the embodiment of whole.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiment
Fig. 1 be number of batteries be 2n (n is positive integer) when the two-way non-dissipative equalizing of batteries in parallel connection group based on capacitance energy storage
The circuit theory diagrams of circuit.Wherein, batteries in parallel connection group is divided into left and right two parts, and left half battery cell is left set of cells, right
Percentage of batteries monomer is right set of cells；Left-right parts battery cell number is n；Left battery cell monomer is ordered from top to bottom respectively
Entitled Bl1、Bl2、Bl3、……Bln, right battery cell monomer is respectively designated as B from top to bottomr1、Br2、Br3、……Brn, Bl1's
Positive pole meets VCC, Br1Negative pole meet GND；Number of batteries is not limited, but with the rising of number of batteries, Balance route can phase
Should become complicated, the switching frequency of bidirectional triode thyristor TRIAC may not reach requirement, and the requirement to storage capacitor also accordingly can be carried
Height, should be selected according to practical situation.Storage capacitor C quantity in equalizing circuit is n, is from top to bottom respectively designated as
C1、C2……Cn；Electric capacity two ends, remaining bidirectional triode thyristor TRIAC are connected in parallel on the bidirectional triode thyristor TRIAC of the quantity such as electric capacity
One end is connected with one end of storage capacitor C, and the other end is connected with one end of battery, control end and the control of bidirectional triode thyristor TRIAC
Circuit processed is connected, and makes turning on and off by control circuit control for bidirectional triode thyristor TRIAC；The number of bidirectional triode thyristor TRIAC
Measure as 3n+2, bidirectional triode thyristor in parallel with electric capacity is from top to bottom respectively designated as S1、S2……Sn, it is connected with left set of cells
Bidirectional triode thyristor be from top to bottom respectively designated as Sl1、Sl2……Sl(n+1), the bidirectional triode thyristor being connected with right set of cells by
S is respectively designated as up to downr1、Sr2……Sr(n+1)；Battery cell Bl1Positive pole meet VCC, battery cell Br1Negative pole meet GND.
Control circuit in figure includes the drive circuit of microcontroller and all bidirectional triode thyristor TRIAC, by control circuit
Microcontroller programming, analyze present battery electricity and calculate should using which kind of control strategy come equalizing circuit；Pass through
Drive circuit in control circuit, provides appropriate driving voltage or shut-off electricity can to the gate pole of bidirectional triode thyristor TRIAC
Pressure, allows bidirectional triode thyristor TRIAC to be turned on or off according to actual demand, and reaching carries out purpose in a balanced way to battery electric quantity.
Fig. 2 (a) is the course of work schematic diagram that electric capacity charges in charging process by taking 4 batteries as an example.Battery cell is total
Number is 4, and left-right parts battery cell number is 2, and left battery cell monomer is from top to bottom respectively designated as Bl1、Bl2, left battery
Battery pack monomer is from top to bottom respectively designated as Br1、Br2, electric capacity is from top to bottom respectively designated as C1、C2.If in left set of cells
Bl1Monomer terminal voltage is all monomer highests, in order to avoid to B1Overcharge, in a PWM cycle, makes bidirectional triode thyristor
TRIACSl1And Sl2Conducting, then electric current is by Sl1, storage capacitor C1、Sl2And Bl1, Bl1Discharge for electric capacity C1Storage energy.
Fig. 2 (b) is the course of work schematic diagram of electric capacity electric discharge in charging process by taking 4 batteries as an example.Battery cell is total
Number is 4, and left-right parts battery cell number is 2, and left battery cell monomer is from top to bottom respectively designated as Bl1、Bl2, left battery
Battery pack monomer is from top to bottom respectively designated as Br1、Br2, electric capacity is from top to bottom respectively designated as C1、C2.It is same with Fig. 2 (a)
In PWM cycle, by C1The energy of storage is released to Br1。Sl1And Sl2Turn it off after opening certain hour, while opening Sr1With
Sr2, now electric current is by electric capacity C1、Sr1, battery Br1And Sr2, electric capacity C1Release energy to Br1, energy is realized from Bl1To Br1's
Transfer.
Fig. 3 (a) is the course of work schematic diagram that electric capacity charges in discharge process by taking 4 batteries as an example.Battery cell is total
Number is 4, and left-right parts battery cell number is 2, and left battery cell monomer is from top to bottom respectively designated as Bl1、Bl2, left battery
Battery pack monomer is from top to bottom respectively designated as Br1、Br2, electric capacity is from top to bottom respectively designated as C1、C2.If in left set of cells
Bl1Monomer terminal voltage is that all monomers are minimum, it is assumed that with Bl1Corresponding battery Br1Energy will not be too low, and Br1And Br2Constituted
Entirety can be Bl1Energy is provided.In order to avoid to B1Overdischarge, in a PWM cycle, makes bidirectional triode thyristor TRIACSr1
And Sr3Conducting, while opening S2, then electric current is by Sr1, storage capacitor C1、S2、Sr3And Br2And Br1, Br1And Br2Discharge for electric capacity
C1Storage energy.
Fig. 3 (b) is the course of work schematic diagram of electric capacity electric discharge in discharge process by taking 4 batteries as an example.Battery cell is total
Number is 4, and left-right parts battery cell number is 2, and left battery cell monomer is from top to bottom respectively designated as Bl1、Bl2, left battery
Battery pack monomer is from top to bottom respectively designated as Br1、Br2, electric capacity is from top to bottom respectively designated as C1、C2.It is same with Fig. 3 (a)
In PWM cycle, Sr1、Sr3And S2Turn it off after opening certain hour, while opening Sl1And Sl2, now electric current is by electric capacity C1、
Sl1, battery Bl1And Sl2, electric capacity C1Release energy to Bl1, energy is realized from Br1And Br2To Bl1Transfer.
Fig. 4 is the voltage oscillogram of each battery cell in equalizing circuit charging emulation experiment by taking 4 batteries as an example.Setting
Under conditions of putting certain control accuracy, each battery cell realizes electric voltage equalization by equalizing circuit.
Fig. 5 be by taking 4 batteries as an example equalizing circuit electric discharge emulation experiment in each battery cell voltage oscillogram.Setting
Under conditions of putting certain control accuracy, each battery cell realizes electric voltage equalization by equalizing circuit.
Above-described embodiment is the present invention preferably embodiment, but embodiments of the present invention not by above-described embodiment
Limit, other any spirit without departing from the present invention and the change, modification, replacement made under principle, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (4)
1. a kind of two-way non-dissipative equalizing circuit of batteries in parallel connection group based on capacitance energy storage, it is characterised in that the equalizing circuit bag
Include：Batteries in parallel connection group, equalizing circuit and control circuit, wherein the batteries in parallel connection group includes being divided into left and right two parts, left half
Battery cell is left set of cells, and right half battery cell is right set of cells, and the left set of cells is connected in parallel on the right set of cells
Together, the left set of cells and the right set of cells are coupled together by the middle equalizing circuit, and the equalizing circuit is again
It is connected with the control circuit, break-make of the control circuit by bidirectional triode thyristor TRIAC in the control equalizing circuit
Energy storage with storage capacitor is acted on, and realizes the dynamic equalization in the series battery charge and discharge process.
2. the two-way non-dissipative equalizing circuit of a kind of batteries in parallel connection group based on capacitance energy storage according to claim 1, its feature
It is,
In the batteries in parallel connection group, battery cell sum is 2n (n is positive integer), and the left battery in battery pack monomer is from up to
Under be respectively designated as Bl1、Bl2、Bl3、……Bln, and Bl1、Bl2、Bl3、……BlnIt is sequentially connected in series；The right battery in battery pack
Monomer is respectively designated as B from top to bottomr1、Br2、Br3、……Brn, and Br1、Br2、Br3、……BrnIt is sequentially connected in series；Wherein, Bl1
Positive pole meet VCC, Br1Negative pole meet GND；
Storage capacitor C quantity in the equalizing circuit is n, is from top to bottom respectively designated as C1、C2……Cn, C1、C2……Cn
It is sequentially connected in series；The quantity of the bidirectional triode thyristor TRIAC in the equalizing circuit is 3n+2, wherein there is n bidirectional triode thyristor TRIAC
S is respectively designated as from top to bottom1、S2……Sn, S1、S2……SnIt is sequentially connected in series, S1、S2……SnStorage capacitor is connected in parallel on respectively
C1、C2……CnTwo ends；Wherein there is n+1 bidirectional triode thyristor TRIAC to be from top to bottom respectively designated as Sl1、Sl2……Sl(n+1),
Sl1、Sl2……SlnT1End respectively with storage capacitor C1、C2……CnUpper end be connected, Sl(n+1)T1End and storage capacitor Cn's
Lower end is connected, Sl1、Sl2……SlnT2End and battery cell Bl1、Bl2、Bl3、……BlnAnode be connected, Sl(n+1)T2End and
Battery cell BlnNegative terminal be connected；Wherein remaining n+1 bidirectional triode thyristor TRIAC is from top to bottom respectively designated as Sr1、
Sr2……Sr(n+1), Sr1、Sr2……SrnT1End respectively with storage capacitor C1、C2……CnUpper end be connected, Sr(n+1)T1End
With storage capacitor CnLower end be connected, Sr1、Sr2……SrnT2End and battery cell Br1、Br2、Br3、……BrnNegative terminal phase
Even, Sr(n+1)T2End and battery cell BrnAnode be connected；
The gate pole of all bidirectional triode thyristor TRIAC is all connected with the control circuit, makes opening for all bidirectional triode thyristor TRIAC
Logical and shut-off is by control circuit control.
3. the two-way non-dissipative equalizing circuit of a kind of batteries in parallel connection group based on capacitance energy storage according to claim 1, its feature
It is,
The control circuit includes the drive circuit of microcontroller and all bidirectional triode thyristor TRIAC, by the microcontroller
Device is programmed, and is analyzed the electricity of each battery cell in the series battery and is determined the control strategy of the equalizing circuit；Institute
The gate pole that drive circuit is stated to bidirectional triode thyristor TRIAC provides appropriate driving voltage or shut-off voltage, allows bidirectional triode thyristor
TRIAC is turned on or off according to actual demand.
4. the two-way non-dissipative equalizing circuit of a kind of batteries in parallel connection group based on capacitance energy storage according to claim 1, its feature
It is,
In the control circuit, the size of the frequency of control signal is according to the capacitance of the circuit storage capacitor C for being controlled, two-way
Depending on the switching loss of controllable silicon TRIAC, battery cell voltage, battery cell capacity.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196388A (en) * | 2017-07-27 | 2017-09-22 | 重庆日拓能源科技有限公司 | Batteries in parallel connection group voltage balance management system, batteries in parallel connection group and its control method |
| CN110299745A (en) * | 2019-07-09 | 2019-10-01 | 广东工业大学 | A kind of functional balanced circuit and correlation technique towards restructural battery pack |
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| CN106602647B (en) | 2023-07-18 |
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