CN105529775A - Sepic-and-Zeta-chopper-circuit-based double-bridge-arm series-connected storage battery bidirectional energy equalizer and control methods thereof - Google Patents
Sepic-and-Zeta-chopper-circuit-based double-bridge-arm series-connected storage battery bidirectional energy equalizer and control methods thereof Download PDFInfo
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- CN105529775A CN105529775A CN201610033203.XA CN201610033203A CN105529775A CN 105529775 A CN105529775 A CN 105529775A CN 201610033203 A CN201610033203 A CN 201610033203A CN 105529775 A CN105529775 A CN 105529775A
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000011159 matrix material Substances 0.000 claims description 128
- 230000003068 static effect Effects 0.000 claims description 17
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000178 monomer Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/1555—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only for the generation of a regulated current to a load whose impedance is substantially inductive
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a Sepic-and-Zeta-chopper-circuit-based double-bridge-arm series-connected storage battery bidirectional energy equalizer and control methods thereof, and belongs to the field of a power electronic technology and a storage battery energy equalization management technology. When a storage battery is in a discharging state, a main control switch Q2 is subjected to PWM (Pulse-Width Modulation) control; an i-th cell (Celli) with the lowest charge state or the lowest end voltage in the storage battery can be charged by an equalization main circuit; the equalization charging current is continuous; and equalization energy is transferred from the equalizer to the Celli. When the storage battery is in a charging state, the main control switch Q1 is subjected to PWM control; the j-th cell (Cellj) with the highest charge state or the highest end voltage in the storage battery can be discharged by the equalization main circuit; the equalization discharging current is continuous; and the equalization energy is transferred from the Cellj to the equalizer. When the storage battery is in a still state, one of the two control methods can be used. The bidirectional energy equalizer has the advantages that the principle of a topological circuit is simple; the equalization current is continuous; the controllability is high; and the equalization efficiency is high.
Description
Technical field
The present invention relates to a kind of based on Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer and control method thereof, belong to power electronic technology and battery energy equalization technique field.
Background technology
Along with the aggravation of environmental pollution and energy crisis, be that developing into of the various electric motor cars of power source or supplementary energy is inevitable with storage battery.Be described for lithium battery below.The nominal voltage of monomer lithium ion battery is up to 3.6v, uses the multiple cell series connection of middle needs.The overcharge of cell or overdischarge all will affect the useful life of battery cell and battery pack, accident of even blasting, and therefore when multiple cell series connection uses, do not allow any cell to occur the state of overdischarge and overcharge.Due to the difference of each cell performance, in use just there will be the inconsistent of the state-of-charge (SOC) of monomer terminal voltage or cell, the charging capacity of battery pack is by the restriction organizing the highest cell of interior state-of-charge, and the discharge capacity of battery pack is by the restriction organizing the minimum cell of interior state-of-charge, along with the increase of battery set charge/discharge cycle-index, the charging capacity of battery pack and discharge capacity will reduce gradually, finally can scrap in advance.In order to improve the charge/discharge capacity of battery pack and extend the useful life of battery, active and effective balanced measure must be taked to Series Sheet accumulator body.
At present, there is multiple battery group equalization scheme, divide into energy consumption type equilibrium and balanced two kinds of non-energy consumption type from energy ezpenditure characteristic during energy trasfer.Non-energy consumption balance scheme, using electric capacity, inductance or flyback transformer as energy-storage travelling wave tube, makes energy shift between cell or between cell and battery pack by switching device.Voltage difference between to take electric capacity as the essence of the equalization scheme of energy-storage travelling wave tube be with two cells realizes balancing energy, and the voltage difference of two cells is very little in reality, consider the tube voltage drop of balanced loop breaker in middle device, therefore energy is difficult to transfer, even can not shift.Using inductance or flyback transformer as the equalization scheme of energy-storage travelling wave tube, realize energy trasfer with the form of euqalizing current, but these the two kinds of balanced main circuits existed at present, all can not ensure by the continuity of the euqalizing current of the cell of equilibrium, therefore equalization efficiency is generally low, and the equalization scheme of flyback transformer, it is to the poor controllability of euqalizing current.
Summary of the invention
For the solution problem that energy consumption balance scheme equalization efficiency is low by no means, the invention provides a kind of based on Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer and control method thereof.
Technical scheme of the present invention is: a kind of based on Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer, comprises for gating by the double-decker bridge arm switch matrix circuit of the cell of equilibrium and balanced main circuit; Wherein bidirectional bridge arm switch matrix circuit is made up of upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S; Balanced main circuit is Sepic and Zeta chopper circuit, is made up of master switch Q1 and Q2 of inductance L 1, inductance L 2, electric capacity C, power supply E, two band anti-paralleled diode D1 and D2; Wherein go up brachium pontis power switch matrix N and the double-deck power switch matrix of lower brachium pontis power switch matrix S all for being made up of the power switch of n to differential concatenation; The upper end of a upper strata n power switch of upper brachium pontis power switch matrix N is all connected with one end of inductance L 1 and the n bar lead-out wire of the lower end of its lower floor n power switch connects the positive pole of the cell that n is connected respectively; The n bar lead-out wire of the upper end of a upper strata n power switch of lower brachium pontis power switch matrix S connects n the negative pole of cell of connecting respectively and the lower end of its lower floor n power switch is all connected with the negative pole of voltage source E with one end of master switch Q1, one end of inductance L 2; The other end of master switch Q1 is connected with the other end of inductance L 1 with one end of electric capacity C simultaneously; One end of master switch Q2 is connected with the other end of inductance L 2 with one end of electric capacity C simultaneously, and the other end of master switch Q2 is connected with the positive pole of power supply E.
Described upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S, master switch Q1 and Q2 are inverse conductivity type device for power switching (power mosfet switch if any parasitic anti-paralleled diode).
Described upper brachium pontis power switch matrix N is made up of the double-deck power switch group Ni1 and Ni2 of differential concatenation n, upper strata power switch group Ni1 by power switch N11 ..., Nn1 form, lower floor power switch group Ni2 by power switch N12 ..., Nn2 is formed; Described lower brachium pontis power switch matrix S is made up of the double-deck power switch group Si1 and Si2 of differential concatenation n, upper strata power switch group Si1 by power switch S11 ... Sn1 form, lower floor power switch group Si2 by power switch S12 ... Sn2 is formed, and n is the number of cell in battery pack.
Described voltage source E to be provided through DC/DC by battery pack or batteries beyond battery pack provides.
Based on a control method for Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer,
When the battery pack of the cell composition of n series connection is in discharge condition, PWM control is carried out to master switch Q2, balanced main circuit is typical Zeta chopper circuit, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by balanced main circuit, equalizing charge current continuity, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, PWM control is carried out to master switch Q1, balanced main circuit is typical Sepic chopper circuit, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by balanced main circuit, balanced discharge current continuity, balanced energy shifts from battery Cellj to equalizer; When the battery pack of the cell composition of n series connection is in static condition, the one in above-mentioned two kinds of control methods can be adopted.
Described method is specially:
When the battery pack of the cell composition of n series connection is in discharge condition: charge switch Ni1 corresponding in by control switch matrix and Si1 conducting, make this cell gating, then PWM control is carried out to master switch Q2, balanced main circuit is typical Zeta chopper circuit, now Celli is in the output of Zeta circuit, cell Celli is by equalizing charge, and equalizing charge current continuity, current value are controlled;
When the battery pack of the cell composition of n series connection is in charged state: discharge switch Nj2 corresponding in by control switch matrix and Sj2 conducting, make this cell gating, then PWM control is carried out to master switch Q1, balanced main circuit is typical Sepic chopper circuit, now Cellj is in the input of Sepic circuit, cell Cellj is by balanced discharge, and balanced discharge current continuity, current value are controlled;
When the battery pack of the cell composition of n series connection is in static condition: if adopt the balance policy identical with battery power discharge state, then need to make switch Ni1 and Si1 conducting, namely select, in battery pack, there is minimum state-of-charge or least significant end voltage cell Celli, PWM control is carried out to master switch Q2 simultaneously, balanced main circuit is typical Zeta chopper circuit, now Celli is in the output of Zeta circuit, cell Celli by equalizing charge, equalizing charge current continuity and controlled; If adopt the balance policy identical with battery pack charging status, then need to make switch Nj2 and Sj2 conducting, namely the cell Cellj in battery pack with the most highly charged state or most significant end voltage is selected, PWM control is carried out to master switch Q1 simultaneously, balanced main circuit is typical Sepic chopper circuit, now Cellj is in the input of Sepic circuit, cell Cellj by balanced discharge, balanced discharge current continuity and controlled.
Operation principle of the present invention is:
The present invention with inductance L 1, L2 and electric capacity C for energy-storage travelling wave tube, different balanced topological circuits is taked according to the operating state of battery pack, balanced main circuit is typical Sepic and Zeta chopper circuit, controls balanced energy is shifted between cell with balanced main circuit by carrying out PWM to switch.Power switch in balanced main circuit all adopts inverse conductivity type power switch, based on Sepic and Zeta chopper circuit operation principle.During battery power discharge, balanced main circuit is typical Zeta chopper circuit, make to have in battery pack the output that minimum state-of-charge or least significant end voltage cell Celli are in Zeta circuit, improved the discharge capacity of whole battery pack by the discharging current reducing cell Celli fast and effectively; During batteries charging, balanced main circuit is typical Sepic chopper circuit, make the cell Cellj in battery pack with the most highly charged state or most significant end voltage be in the input of Sepic circuit, improved the charging capacity of whole battery pack by the charging current reducing cell Cellj fast and effectively; When battery pack leaves standstill, the one in above two kinds of Balance route strategies can be adopted.When practical application, according to the inconsistent degree of state-of-charge of each cell used, the size of euqalizing current can be regulated by adjustment duty ratio.
The invention has the beneficial effects as follows: topological circuit principle is simple, during batteries charging, is in the input of Sepic chopper circuit by the cell of equilibrium, its balanced discharge electric current is continuous within the PWM cycle; During battery power discharge, be in the output of Zeta chopper circuit by the cell of equilibrium, its equalizing charge electric current is continuous within the PWM cycle.Euqalizing current is continuous, and controllability is strong, and equalization efficiency is high.During use, only need set the PWM frequency of master switch and suitable duty ratio, it is made it be in conducting state by the respective switch of the cell of equilibrium by switch matrix, has so not only reduced switching loss but also the control circuit of device for power switching is simplified.
Accompanying drawing explanation
Fig. 1 is topological circuit schematic diagram of the present invention;
Balanced main circuit fundamental diagram when Fig. 2 is batteries charging;
Fig. 3 is the waveform correlation figure of balancing procedure shown in Fig. 2;
Balanced main circuit fundamental diagram when Fig. 4 is battery power discharge;
Fig. 5 is the waveform correlation figure of balancing procedure shown in Fig. 4.
Embodiment
Embodiment 1: as Figure 1-5, a kind of based on Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer, comprise for gating by the double-decker bridge arm switch matrix circuit of the cell of equilibrium and balanced main circuit; Wherein bidirectional bridge arm switch matrix circuit is made up of upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S; Balanced main circuit is Sepic and Zeta chopper circuit, is made up of master switch Q1 and Q2 of inductance L 1, inductance L 2, electric capacity C, power supply E, two band anti-paralleled diode D1 and D2; Wherein go up brachium pontis power switch matrix N and the double-deck power switch matrix of lower brachium pontis power switch matrix S all for being made up of the power switch of n to differential concatenation; The upper end of a upper strata n power switch of upper brachium pontis power switch matrix N is all connected with one end of inductance L 1 and the n bar lead-out wire of the lower end of its lower floor n power switch connects the positive pole of the cell that n is connected respectively; The n bar lead-out wire of the upper end of a upper strata n power switch of lower brachium pontis power switch matrix S connects n the negative pole of cell of connecting respectively and the lower end of its lower floor n power switch is all connected with the negative pole of voltage source E with one end of master switch Q1, one end of inductance L 2; The other end of master switch Q1 is connected with the other end of inductance L 1 with one end of electric capacity C simultaneously; One end of master switch Q2 is connected with the other end of inductance L 2 with one end of electric capacity C simultaneously, and the other end of master switch Q2 is connected with the positive pole of power supply E.
Described upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S, master switch Q1 and Q2 are inverse conductivity type device for power switching.
Described upper brachium pontis power switch matrix N is made up of the double-deck power switch group Ni1 and Ni2 of differential concatenation n, upper strata power switch group Ni1 by power switch N11 ..., Nn1 form, lower floor power switch group Ni2 by power switch N12 ..., Nn2 is formed; Described lower brachium pontis power switch matrix S is made up of the double-deck power switch group Si1 and Si2 of differential concatenation n, upper strata power switch group Si1 by power switch S11 ... Sn1 form, lower floor power switch group Si2 by power switch S12 ... Sn2 is formed, and n is the number of cell in battery pack.
Described voltage source E to be provided through DC/DC by battery pack or batteries beyond battery pack provides.
Based on a control method for Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer,
When the battery pack of the cell composition of n series connection is in discharge condition, PWM control is carried out to master switch Q2, balanced main circuit is typical Zeta chopper circuit, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by balanced main circuit, equalizing charge current continuity, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, PWM control is carried out to master switch Q1, balanced main circuit is typical Sepic chopper circuit, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by balanced main circuit, balanced discharge current continuity, balanced energy shifts from battery Cellj to equalizer; When the battery pack of the cell composition of n series connection is in static condition, the one in above-mentioned two kinds of control methods can be adopted.
Described method is specially:
When the battery pack of the cell composition of n series connection is in discharge condition: charge switch Ni1 corresponding in by control switch matrix and Si1 conducting, make this cell gating, then PWM control is carried out to master switch Q2, balanced main circuit is typical Zeta chopper circuit, now Celli is in the output of Zeta circuit, cell Celli is by equalizing charge, and equalizing charge current continuity, current value are controlled;
When the battery pack of the cell composition of n series connection is in charged state: discharge switch Nj2 corresponding in by control switch matrix and Sj2 conducting, make this cell gating, then PWM control is carried out to master switch Q1, balanced main circuit is typical Sepic chopper circuit, now Cellj is in the input of Sepic circuit, cell Cellj is by balanced discharge, and balanced discharge current continuity, current value are controlled;
When the battery pack of the cell composition of n series connection is in static condition: if adopt the balance policy identical with battery power discharge state, then need to make switch Ni1 and Si1 conducting, namely select, in battery pack, there is minimum state-of-charge or least significant end voltage cell Celli, PWM control is carried out to master switch Q2 simultaneously, balanced main circuit is typical Zeta chopper circuit, now Celli is in the output of Zeta circuit, cell Celli by equalizing charge, equalizing charge current continuity and controlled; If adopt the balance policy identical with battery pack charging status, then need to make switch Nj2 and Sj2 conducting, namely the cell Cellj in battery pack with the most highly charged state or most significant end voltage is selected, PWM control is carried out to master switch Q1 simultaneously, balanced main circuit is typical Sepic chopper circuit, now Cellj is in the input of Sepic circuit, cell Cellj by balanced discharge, balanced discharge current continuity and controlled.
As shown in Figure 2, when battery pack is in charged state, suppose that the terminal voltage of cell Cell2 in battery pack is the highest, by the discharge switch N22 of Cell2 in control switch matrix and S22 conducting time balanced, make this cell gating, then PWM control is carried out to master switch Q1, realize energy and shifted to power supply E by cell Cell2.During master switch Q1 conducting, 2. 1. loop be simultaneously activated with loop, wherein loop is 1. successively through cell Cell2, switch N22, diode DN21, inductance L 1, master switch Q1, switch S 22 and diode DS21, and loop is 2. successively through electric capacity C, master switch Q1 and inductance L 2; When master switch Q1 turns off, 4. 3. loop be simultaneously activated with loop, wherein loop is 3. successively through cell Cell2, switch N22, diode DN21, inductance L 1, electric capacity C, diode D2, power supply E, switch S 22 and diode DS21, and loop is 4. successively through inductance L 2, diode D2 and voltage source E.
As shown in Figure 3, be the waveform correlation of Fig. 2, wherein " on " represents this switch and is in conducting state, and " off " representation switch is in off state, and i is battery Cell2 balanced discharge current waveform.Balanced main circuit is typical Sepic chopper circuit, is in the input of Sepic chopper circuit by the cell Cell2 of equilibrium.Time balanced, by discharge switch N22 and the S22 conducting of Cell2 in control switch matrix, make this cell gating, then carry out PWM control to master switch Q1, cell Cell2 balanced discharge, balanced discharge current waveform is as shown in i in figure.
As shown in Figure 4, when battery pack is in discharge condition, suppose that the terminal voltage of cell Cell2 in battery pack is minimum, by the charge switch N21 of Cell2 in control switch matrix and S21 conducting time balanced, make this cell gating, then PWM control is carried out to master switch Q2, realize energy and shifted to cell Cell2 by voltage source E.During master switch Q2 conducting, 2. 1. loop be simultaneously activated with loop, wherein loop is 1. successively through voltage source E, master switch Q2 and inductance L 2, and loop is 2. successively through power supply E, master switch Q2, electric capacity C, inductance L 1, switch N21, diode DN22, cell Cell2, switch S 21, diode DS22; When master switch Q2 turns off, 4. 3. loop be simultaneously activated with loop, wherein loop is 3. successively through L2, diode D1 and electric capacity C, and loop is 4. successively through inductance L 1, switch N21, diode DN22, cell Cell2, switch S 21, diode DS22 and diode D1.
As shown in Figure 5, be the waveform correlation of Fig. 4, wherein i is battery Cell2 equalizing charge current waveform, and balanced main circuit is typical Zeta chopper circuit, is in the output of Zeta chopper circuit by the cell Cell2 of equilibrium.Time balanced, by charge switch N21 and the S21 conducting of Cell2 in control switch matrix, make this cell gating, then carry out PWM control to master switch Q2, cell Cell2 is by equalizing charge, and equalizing charge current waveform is as shown in i in figure.
Embodiment 2: as Figure 1-5, a kind of based on Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer, comprise for gating by the double-decker bridge arm switch matrix circuit of the cell of equilibrium and balanced main circuit; Wherein bidirectional bridge arm switch matrix circuit is made up of upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S; Balanced main circuit is Sepic and Zeta chopper circuit, is made up of master switch Q1 and Q2 of inductance L 1, inductance L 2, electric capacity C, power supply E, two band anti-paralleled diode D1 and D2; Wherein go up brachium pontis power switch matrix N and the double-deck power switch matrix of lower brachium pontis power switch matrix S all for being made up of the power switch of n to differential concatenation; The upper end of a upper strata n power switch of upper brachium pontis power switch matrix N is all connected with one end of inductance L 1 and the n bar lead-out wire of the lower end of its lower floor n power switch connects the positive pole of the cell that n is connected respectively; The n bar lead-out wire of the upper end of a upper strata n power switch of lower brachium pontis power switch matrix S connects n the negative pole of cell of connecting respectively and the lower end of its lower floor n power switch is all connected with the negative pole of voltage source E with one end of master switch Q1, one end of inductance L 2; The other end of master switch Q1 is connected with the other end of inductance L 1 with one end of electric capacity C simultaneously; One end of master switch Q2 is connected with the other end of inductance L 2 with one end of electric capacity C simultaneously, and the other end of master switch Q2 is connected with the positive pole of power supply E.
Described upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S, master switch Q1 and Q2 are inverse conductivity type device for power switching.
Described upper brachium pontis power switch matrix N is made up of the double-deck power switch group Ni1 and Ni2 of differential concatenation n, upper strata power switch group Ni1 by power switch N11 ..., Nn1 form, lower floor power switch group Ni2 by power switch N12 ..., Nn2 is formed; Described lower brachium pontis power switch matrix S is made up of the double-deck power switch group Si1 and Si2 of differential concatenation n, upper strata power switch group Si1 by power switch S11 ... Sn1 form, lower floor power switch group Si2 by power switch S12 ... Sn2 is formed, and n is the number of cell in battery pack.
Described voltage source E is provided through DC/DC by battery pack.
Based on a control method for Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer,
When the battery pack of the cell composition of n series connection is in discharge condition, PWM control is carried out to master switch Q2, balanced main circuit is typical Zeta chopper circuit, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by balanced main circuit, equalizing charge current continuity, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, PWM control is carried out to master switch Q1, balanced main circuit is typical Sepic chopper circuit, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by balanced main circuit, balanced discharge current continuity, balanced energy shifts from battery Cellj to equalizer; When the battery pack of the cell composition of n series connection is in static condition, the one in above-mentioned two kinds of control methods can be adopted.
Described method is specially:
When the battery pack of the cell composition of n series connection is in discharge condition: charge switch Ni1 corresponding in by control switch matrix and Si1 conducting, make this cell gating, then PWM control is carried out to master switch Q2, balanced main circuit is typical Zeta chopper circuit, now Celli is in the output of Zeta circuit, cell Celli is by equalizing charge, and equalizing charge current continuity, current value are controlled;
When the battery pack of the cell composition of n series connection is in charged state: discharge switch Nj2 corresponding in by control switch matrix and Sj2 conducting, make this cell gating, then PWM control is carried out to master switch Q1, balanced main circuit is typical Sepic chopper circuit, now Cellj is in the input of Sepic circuit, cell Cellj is by balanced discharge, and balanced discharge current continuity, current value are controlled;
When the battery pack of the cell composition of n series connection is in static condition: if adopt the balance policy identical with battery power discharge state, then need to make switch Ni1 and Si1 conducting, namely select, in battery pack, there is minimum state-of-charge or least significant end voltage cell Celli, PWM control is carried out to master switch Q2 simultaneously, balanced main circuit is typical Zeta chopper circuit, now Celli is in the output of Zeta circuit, cell Celli by equalizing charge, equalizing charge current continuity and controlled; If adopt the balance policy identical with battery pack charging status, then need to make switch Nj2 and Sj2 conducting, namely the cell Cellj in battery pack with the most highly charged state or most significant end voltage is selected, PWM control is carried out to master switch Q1 simultaneously, balanced main circuit is typical Sepic chopper circuit, now Cellj is in the input of Sepic circuit, cell Cellj by balanced discharge, balanced discharge current continuity and controlled.
Embodiment 3: as Figure 1-5, a kind of based on Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer, comprise for gating by the double-decker bridge arm switch matrix circuit of the cell of equilibrium and balanced main circuit; Wherein bidirectional bridge arm switch matrix circuit is made up of upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S; Balanced main circuit is Sepic and Zeta chopper circuit, is made up of master switch Q1 and Q2 of inductance L 1, inductance L 2, electric capacity C, power supply E, two band anti-paralleled diode D1 and D2; Wherein go up brachium pontis power switch matrix N and the double-deck power switch matrix of lower brachium pontis power switch matrix S all for being made up of the power switch of n to differential concatenation; The upper end of a upper strata n power switch of upper brachium pontis power switch matrix N is all connected with one end of inductance L 1 and the n bar lead-out wire of the lower end of its lower floor n power switch connects the positive pole of the cell that n is connected respectively; The n bar lead-out wire of the upper end of a upper strata n power switch of lower brachium pontis power switch matrix S connects n the negative pole of cell of connecting respectively and the lower end of its lower floor n power switch is all connected with the negative pole of voltage source E with one end of master switch Q1, one end of inductance L 2; The other end of master switch Q1 is connected with the other end of inductance L 1 with one end of electric capacity C simultaneously; One end of master switch Q2 is connected with the other end of inductance L 2 with one end of electric capacity C simultaneously, and the other end of master switch Q2 is connected with the positive pole of power supply E.
Described upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S, master switch Q1 and Q2 are inverse conductivity type device for power switching.
Described upper brachium pontis power switch matrix N is made up of the double-deck power switch group Ni1 and Ni2 of differential concatenation n, upper strata power switch group Ni1 by power switch N11 ..., Nn1 form, lower floor power switch group Ni2 by power switch N12 ..., Nn2 is formed; Described lower brachium pontis power switch matrix S is made up of the double-deck power switch group Si1 and Si2 of differential concatenation n, upper strata power switch group Si1 by power switch S11 ... Sn1 form, lower floor power switch group Si2 by power switch S12 ... Sn2 is formed, and n is the number of cell in battery pack.
Described voltage source E is provided by the batteries beyond battery pack.
Based on a control method for Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer,
When the battery pack of the cell composition of n series connection is in discharge condition, PWM control is carried out to master switch Q2, balanced main circuit is typical Zeta chopper circuit, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by balanced main circuit, equalizing charge current continuity, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, PWM control is carried out to master switch Q1, balanced main circuit is typical Sepic chopper circuit, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by balanced main circuit, balanced discharge current continuity, balanced energy shifts from battery Cellj to equalizer; When the battery pack of the cell composition of n series connection is in static condition, the one in above-mentioned two kinds of control methods can be adopted.
Described method is specially:
When the battery pack of the cell composition of n series connection is in discharge condition: charge switch Ni1 corresponding in by control switch matrix and Si1 conducting, make this cell gating, then PWM control is carried out to master switch Q2, balanced main circuit is typical Zeta chopper circuit, now Celli is in the output of Zeta circuit, cell Celli is by equalizing charge, and equalizing charge current continuity, current value are controlled;
When the battery pack of the cell composition of n series connection is in charged state: discharge switch Nj2 corresponding in by control switch matrix and Sj2 conducting, make this cell gating, then PWM control is carried out to master switch Q1, balanced main circuit is typical Sepic chopper circuit, now Cellj is in the input of Sepic circuit, cell Cellj is by balanced discharge, and balanced discharge current continuity, current value are controlled;
When the battery pack of the cell composition of n series connection is in static condition: if adopt the balance policy identical with battery power discharge state, then need to make switch Ni1 and Si1 conducting, namely select, in battery pack, there is minimum state-of-charge or least significant end voltage cell Celli, PWM control is carried out to master switch Q2 simultaneously, balanced main circuit is typical Zeta chopper circuit, now Celli is in the output of Zeta circuit, cell Celli by equalizing charge, equalizing charge current continuity and controlled; If adopt the balance policy identical with battery pack charging status, then need to make switch Nj2 and Sj2 conducting, namely the cell Cellj in battery pack with the most highly charged state or most significant end voltage is selected, PWM control is carried out to master switch Q1 simultaneously, balanced main circuit is typical Sepic chopper circuit, now Cellj is in the input of Sepic circuit, cell Cellj by balanced discharge, balanced discharge current continuity and controlled.
Embodiment 4: as Figure 1-5, a kind of based on Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer, comprise for gating by the double-decker bridge arm switch matrix circuit of the cell of equilibrium and balanced main circuit; Wherein bidirectional bridge arm switch matrix circuit is made up of upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S; Balanced main circuit is Sepic and Zeta chopper circuit, is made up of master switch Q1 and Q2 of inductance L 1, inductance L 2, electric capacity C, power supply E, two band anti-paralleled diode D1 and D2; Wherein go up brachium pontis power switch matrix N and the double-deck power switch matrix of lower brachium pontis power switch matrix S all for being made up of the power switch of n to differential concatenation; The upper end of a upper strata n power switch of upper brachium pontis power switch matrix N is all connected with one end of inductance L 1 and the n bar lead-out wire of the lower end of its lower floor n power switch connects the positive pole of the cell that n is connected respectively; The n bar lead-out wire of the upper end of a upper strata n power switch of lower brachium pontis power switch matrix S connects n the negative pole of cell of connecting respectively and the lower end of its lower floor n power switch is all connected with the negative pole of voltage source E with one end of master switch Q1, one end of inductance L 2; The other end of master switch Q1 is connected with the other end of inductance L 1 with one end of electric capacity C simultaneously; One end of master switch Q2 is connected with the other end of inductance L 2 with one end of electric capacity C simultaneously, and the other end of master switch Q2 is connected with the positive pole of power supply E.
Described upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S, master switch Q1 and Q2 are inverse conductivity type device for power switching.
Described upper brachium pontis power switch matrix N is made up of the double-deck power switch group Ni1 and Ni2 of differential concatenation n, upper strata power switch group Ni1 by power switch N11 ..., Nn1 form, lower floor power switch group Ni2 by power switch N12 ..., Nn2 is formed; Described lower brachium pontis power switch matrix S is made up of the double-deck power switch group Si1 and Si2 of differential concatenation n, upper strata power switch group Si1 by power switch S11 ... Sn1 form, lower floor power switch group Si2 by power switch S12 ... Sn2 is formed, and n is the number of cell in battery pack.
Based on a control method for Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer,
When the battery pack of the cell composition of n series connection is in discharge condition, PWM control is carried out to master switch Q2, balanced main circuit is typical Zeta chopper circuit, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by balanced main circuit, equalizing charge current continuity, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, PWM control is carried out to master switch Q1, balanced main circuit is typical Sepic chopper circuit, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by balanced main circuit, balanced discharge current continuity, balanced energy shifts from battery Cellj to equalizer; When the battery pack of the cell composition of n series connection is in static condition, the one in above-mentioned two kinds of control methods can be adopted.
Described method is specially:
When the battery pack of the cell composition of n series connection is in discharge condition: charge switch Ni1 corresponding in by control switch matrix and Si1 conducting, make this cell gating, then PWM control is carried out to master switch Q2, balanced main circuit is typical Zeta chopper circuit, now Celli is in the output of Zeta circuit, cell Celli is by equalizing charge, and equalizing charge current continuity, current value are controlled;
When the battery pack of the cell composition of n series connection is in charged state: discharge switch Nj2 corresponding in by control switch matrix and Sj2 conducting, make this cell gating, then PWM control is carried out to master switch Q1, balanced main circuit is typical Sepic chopper circuit, now Cellj is in the input of Sepic circuit, cell Cellj is by balanced discharge, and balanced discharge current continuity, current value are controlled;
When the battery pack of the cell composition of n series connection is in static condition: if adopt the balance policy identical with battery power discharge state, then need to make switch Ni1 and Si1 conducting, namely select, in battery pack, there is minimum state-of-charge or least significant end voltage cell Celli, PWM control is carried out to master switch Q2 simultaneously, balanced main circuit is typical Zeta chopper circuit, now Celli is in the output of Zeta circuit, cell Celli by equalizing charge, equalizing charge current continuity and controlled; If adopt the balance policy identical with battery pack charging status, then need to make switch Nj2 and Sj2 conducting, namely the cell Cellj in battery pack with the most highly charged state or most significant end voltage is selected, PWM control is carried out to master switch Q1 simultaneously, balanced main circuit is typical Sepic chopper circuit, now Cellj is in the input of Sepic circuit, cell Cellj by balanced discharge, balanced discharge current continuity and controlled.
Embodiment 5: as Figure 1-5, a kind of based on Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer, comprise for gating by the double-decker bridge arm switch matrix circuit of the cell of equilibrium and balanced main circuit; Wherein bidirectional bridge arm switch matrix circuit is made up of upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S; Balanced main circuit is Sepic and Zeta chopper circuit, is made up of master switch Q1 and Q2 of inductance L 1, inductance L 2, electric capacity C, power supply E, two band anti-paralleled diode D1 and D2; Wherein go up brachium pontis power switch matrix N and the double-deck power switch matrix of lower brachium pontis power switch matrix S all for being made up of the power switch of n to differential concatenation; The upper end of a upper strata n power switch of upper brachium pontis power switch matrix N is all connected with one end of inductance L 1 and the n bar lead-out wire of the lower end of its lower floor n power switch connects the positive pole of the cell that n is connected respectively; The n bar lead-out wire of the upper end of a upper strata n power switch of lower brachium pontis power switch matrix S connects n the negative pole of cell of connecting respectively and the lower end of its lower floor n power switch is all connected with the negative pole of voltage source E with one end of master switch Q1, one end of inductance L 2; The other end of master switch Q1 is connected with the other end of inductance L 1 with one end of electric capacity C simultaneously; One end of master switch Q2 is connected with the other end of inductance L 2 with one end of electric capacity C simultaneously, and the other end of master switch Q2 is connected with the positive pole of power supply E.
Described upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S, master switch Q1 and Q2 are inverse conductivity type device for power switching.
Based on a control method for Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer,
When the battery pack of the cell composition of n series connection is in discharge condition, PWM control is carried out to master switch Q2, balanced main circuit is typical Zeta chopper circuit, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by balanced main circuit, equalizing charge current continuity, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, PWM control is carried out to master switch Q1, balanced main circuit is typical Sepic chopper circuit, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by balanced main circuit, balanced discharge current continuity, balanced energy shifts from battery Cellj to equalizer; When the battery pack of the cell composition of n series connection is in static condition, the one in above-mentioned two kinds of control methods can be adopted.
Described method is specially:
When the battery pack of the cell composition of n series connection is in discharge condition: charge switch Ni1 corresponding in by control switch matrix and Si1 conducting, make this cell gating, then PWM control is carried out to master switch Q2, balanced main circuit is typical Zeta chopper circuit, now Celli is in the output of Zeta circuit, cell Celli is by equalizing charge, and equalizing charge current continuity, current value are controlled;
When the battery pack of the cell composition of n series connection is in charged state: discharge switch Nj2 corresponding in by control switch matrix and Sj2 conducting, make this cell gating, then PWM control is carried out to master switch Q1, balanced main circuit is typical Sepic chopper circuit, now Cellj is in the input of Sepic circuit, cell Cellj is by balanced discharge, and balanced discharge current continuity, current value are controlled;
When the battery pack of the cell composition of n series connection is in static condition: adopt the balance policy identical with battery pack charging status, then need to make switch Nj2 and Sj2 conducting, namely the cell Cellj in battery pack with the most highly charged state or most significant end voltage is selected, PWM control is carried out to master switch Q1 simultaneously, balanced main circuit is typical Sepic chopper circuit, now Cellj is in the input of Sepic circuit, cell Cellj by balanced discharge, balanced discharge current continuity and controlled.
Embodiment 6: as Figure 1-5, a kind of based on Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer, comprise for gating by the double-decker bridge arm switch matrix circuit of the cell of equilibrium and balanced main circuit; Wherein bidirectional bridge arm switch matrix circuit is made up of upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S; Balanced main circuit is Sepic and Zeta chopper circuit, is made up of master switch Q1 and Q2 of inductance L 1, inductance L 2, electric capacity C, power supply E, two band anti-paralleled diode D1 and D2; Wherein go up brachium pontis power switch matrix N and the double-deck power switch matrix of lower brachium pontis power switch matrix S all for being made up of the power switch of n to differential concatenation; The upper end of a upper strata n power switch of upper brachium pontis power switch matrix N is all connected with one end of inductance L 1 and the n bar lead-out wire of the lower end of its lower floor n power switch connects the positive pole of the cell that n is connected respectively; The n bar lead-out wire of the upper end of a upper strata n power switch of lower brachium pontis power switch matrix S connects n the negative pole of cell of connecting respectively and the lower end of its lower floor n power switch is all connected with the negative pole of voltage source E with one end of master switch Q1, one end of inductance L 2; The other end of master switch Q1 is connected with the other end of inductance L 1 with one end of electric capacity C simultaneously; One end of master switch Q2 is connected with the other end of inductance L 2 with one end of electric capacity C simultaneously, and the other end of master switch Q2 is connected with the positive pole of power supply E.
Based on a control method for Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer,
When the battery pack of the cell composition of n series connection is in discharge condition, PWM control is carried out to master switch Q2, balanced main circuit is typical Zeta chopper circuit, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by balanced main circuit, equalizing charge current continuity, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, PWM control is carried out to master switch Q1, balanced main circuit is typical Sepic chopper circuit, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by balanced main circuit, balanced discharge current continuity, balanced energy shifts from battery Cellj to equalizer; When the battery pack of the cell composition of n series connection is in static condition, the one in above-mentioned two kinds of control methods can be adopted.
Described method is specially:
When the battery pack of the cell composition of n series connection is in discharge condition: charge switch Ni1 corresponding in by control switch matrix and Si1 conducting, make this cell gating, then PWM control is carried out to master switch Q2, balanced main circuit is typical Zeta chopper circuit, now Celli is in the output of Zeta circuit, cell Celli is by equalizing charge, and equalizing charge current continuity, current value are controlled;
When the battery pack of the cell composition of n series connection is in charged state: discharge switch Nj2 corresponding in by control switch matrix and Sj2 conducting, make this cell gating, then PWM control is carried out to master switch Q1, balanced main circuit is typical Sepic chopper circuit, now Cellj is in the input of Sepic circuit, cell Cellj is by balanced discharge, and balanced discharge current continuity, current value are controlled;
When the battery pack of the cell composition of n series connection is in static condition: adopt the balance policy identical with battery power discharge state, then need to make switch Ni1 and Si1 conducting, namely select, in battery pack, there is minimum state-of-charge or least significant end voltage cell Celli, PWM control is carried out to master switch Q2 simultaneously, balanced main circuit is typical Zeta chopper circuit, now Celli is in the output of Zeta circuit, cell Celli by equalizing charge, equalizing charge current continuity and controlled.
Embodiment 7: as Figure 1-5, a kind of based on Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer, comprise for gating by the double-decker bridge arm switch matrix circuit of the cell of equilibrium and balanced main circuit; Wherein bidirectional bridge arm switch matrix circuit is made up of upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S; Balanced main circuit is Sepic and Zeta chopper circuit, is made up of master switch Q1 and Q2 of inductance L 1, inductance L 2, electric capacity C, power supply E, two band anti-paralleled diode D1 and D2; Wherein go up brachium pontis power switch matrix N and the double-deck power switch matrix of lower brachium pontis power switch matrix S all for being made up of the power switch of n to differential concatenation; The upper end of a upper strata n power switch of upper brachium pontis power switch matrix N is all connected with one end of inductance L 1 and the n bar lead-out wire of the lower end of its lower floor n power switch connects the positive pole of the cell that n is connected respectively; The n bar lead-out wire of the upper end of a upper strata n power switch of lower brachium pontis power switch matrix S connects n the negative pole of cell of connecting respectively and the lower end of its lower floor n power switch is all connected with the negative pole of voltage source E with one end of master switch Q1, one end of inductance L 2; The other end of master switch Q1 is connected with the other end of inductance L 1 with one end of electric capacity C simultaneously; One end of master switch Q2 is connected with the other end of inductance L 2 with one end of electric capacity C simultaneously, and the other end of master switch Q2 is connected with the positive pole of power supply E.
Based on a control method for Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer,
When the battery pack of the cell composition of n series connection is in discharge condition, PWM control is carried out to master switch Q2, balanced main circuit is typical Zeta chopper circuit, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by balanced main circuit, equalizing charge current continuity, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, PWM control is carried out to master switch Q1, balanced main circuit is typical Sepic chopper circuit, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by balanced main circuit, balanced discharge current continuity, balanced energy shifts from battery Cellj to equalizer; When the battery pack of the cell composition of n series connection is in static condition, the one in above-mentioned two kinds of control methods can be adopted.
By reference to the accompanying drawings the specific embodiment of the present invention is explained in detail above, but the present invention is not limited to above-mentioned execution mode, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.
Claims (6)
1., based on a Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer, it is characterized in that: comprise for gating by the double-decker bridge arm switch matrix circuit of the cell of equilibrium and balanced main circuit; Wherein bidirectional bridge arm switch matrix circuit is made up of upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S; Balanced main circuit is Sepic and Zeta chopper circuit, is made up of master switch Q1 and Q2 of inductance L 1, inductance L 2, electric capacity C, power supply E, two band anti-paralleled diode D1 and D2; Wherein go up brachium pontis power switch matrix N and the double-deck power switch matrix of lower brachium pontis power switch matrix S all for being made up of the power switch of n to differential concatenation; The upper end of a upper strata n power switch of upper brachium pontis power switch matrix N is all connected with one end of inductance L 1 and the n bar lead-out wire of the lower end of its lower floor n power switch connects the positive pole of the cell that n is connected respectively; The n bar lead-out wire of the upper end of a upper strata n power switch of lower brachium pontis power switch matrix S connects n the negative pole of cell of connecting respectively and the lower end of its lower floor n power switch is all connected with the negative pole of voltage source E with one end of master switch Q1, one end of inductance L 2; The other end of master switch Q1 is connected with the other end of inductance L 1 with one end of electric capacity C simultaneously; One end of master switch Q2 is connected with the other end of inductance L 2 with one end of electric capacity C simultaneously, and the other end of master switch Q2 is connected with the positive pole of power supply E.
2. according to claim 1 based on Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer, it is characterized in that: described upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S, master switch Q1 and Q2 are inverse conductivity type device for power switching.
3. according to claim 1 based on Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer, it is characterized in that: described upper brachium pontis power switch matrix N is made up of the double-deck power switch group Ni1 and Ni2 of differential concatenation n, upper strata power switch group Ni1 is by power switch N11, Nn1 is formed, lower floor power switch group Ni2 by power switch N12 ..., Nn2 is formed; Described lower brachium pontis power switch matrix S is made up of the double-deck power switch group Si1 and Si2 of differential concatenation n, upper strata power switch group Si1 by power switch S11 ... Sn1 form, lower floor power switch group Si2 by power switch S12 ... Sn2 is formed, and n is the number of cell in battery pack.
4. according to claim 1 based on Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer, it is characterized in that: described voltage source E to be provided through DC/DC by battery pack or batteries beyond battery pack provides.
5. the control method based on Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer according to any one of claim 1-4, is characterized in that:
When the battery pack of the cell composition of n series connection is in discharge condition, PWM control is carried out to master switch Q2, balanced main circuit is typical Zeta chopper circuit, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by balanced main circuit, equalizing charge current continuity, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, PWM control is carried out to master switch Q1, balanced main circuit is typical Sepic chopper circuit, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by balanced main circuit, balanced discharge current continuity, balanced energy shifts from battery Cellj to equalizer; When the battery pack of the cell composition of n series connection is in static condition, the one in above-mentioned two kinds of control methods can be adopted.
6. the control method based on Sepic and Zeta chopper circuit doube bridge arm series-connected batteries bidirectional energy equalizer according to claim 5, is characterized in that: described method is specially:
When the battery pack of the cell composition of n series connection is in discharge condition: charge switch Ni1 corresponding in by control switch matrix and Si1 conducting, make this cell gating, then PWM control is carried out to master switch Q2, balanced main circuit is typical Zeta chopper circuit, now Celli is in the output of Zeta circuit, cell Celli is by equalizing charge, and equalizing charge current continuity, current value are controlled;
When the battery pack of the cell composition of n series connection is in charged state: discharge switch Nj2 corresponding in by control switch matrix and Sj2 conducting, make this cell gating, then PWM control is carried out to master switch Q1, balanced main circuit is typical Sepic chopper circuit, now Cellj is in the input of Sepic circuit, cell Cellj is by balanced discharge, and balanced discharge current continuity, current value are controlled;
When the battery pack of the cell composition of n series connection is in static condition: if adopt the balance policy identical with battery power discharge state, then need to make switch Ni1 and Si1 conducting, namely select, in battery pack, there is minimum state-of-charge or least significant end voltage cell Celli, PWM control is carried out to master switch Q2 simultaneously, balanced main circuit is typical Zeta chopper circuit, now Celli is in the output of Zeta circuit, cell Celli by equalizing charge, equalizing charge current continuity and controlled; If adopt the balance policy identical with battery pack charging status, then need to make switch Nj2 and Sj2 conducting, namely the cell Cellj in battery pack with the most highly charged state or most significant end voltage is selected, PWM control is carried out to master switch Q1 simultaneously, balanced main circuit is typical Sepic chopper circuit, now Cellj is in the input of Sepic circuit, cell Cellj by balanced discharge, balanced discharge current continuity and controlled.
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Application publication date: 20160427 |