CN104868532A - Cuk chopper circuit bidirectional arm-based series storage cell pack bidirectional energy equalizer and control method thereof - Google Patents
Cuk chopper circuit bidirectional arm-based series storage cell pack bidirectional energy equalizer and control method thereof Download PDFInfo
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- CN104868532A CN104868532A CN201510230944.2A CN201510230944A CN104868532A CN 104868532 A CN104868532 A CN 104868532A CN 201510230944 A CN201510230944 A CN 201510230944A CN 104868532 A CN104868532 A CN 104868532A
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 19
- 210000000352 storage cell Anatomy 0.000 title abstract 4
- 239000011159 matrix material Substances 0.000 claims description 109
- 230000003068 static effect Effects 0.000 claims description 18
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 210000004027 cell Anatomy 0.000 abstract 10
- 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
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Abstract
The invention relates to a Cuk chopper circuit bidirectional arm-based series storage cell pack bidirectional energy equalizer and a control method thereof and belongs to the power electronic technology and storage cell pack energy equalizing management technical field. According to the control method of the Cuk chopper circuit bidirectional arm-based series storage cell pack bidirectional energy equalizer, when a cell pack formed by n series cells is in a discharging or still state, the i-th cell (celli) with lowest state-of-charge or lowers terminal voltage in the cell pack is charged by an equalizing circuit, while, the other cells in the pack are not affected, and equalized energy is transferred to the celli from the equalizer; and when the cell pack formed by the n series cells is in a charging state, the j-th cell (cellj) with highest state-of-charge or highest terminal voltage in the cell pack is subjected to discharging by the equalizing circuit, while, the other cells in the pack are not affected, equalized energy is transferred to the equalizer from the cellj. The energy equalizer and the control method thereof of the invention have the advantages of simple topological circuit principles, continuous equalized current, high controllability and high equalizing efficiency.
Description
Technical field
The present invention relates to a kind of series-connected batteries bidirectional energy equalizer based on the two-way brachium pontis of Cuk chopper circuit 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 equalizing 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 above-mentioned prior art, be the solution problem that energy consumption balance scheme equalization efficiency is low by no means, the invention provides a kind of series-connected batteries bidirectional energy equalizer based on the two-way brachium pontis of Cuk chopper circuit and control method thereof.
Technical scheme of the present invention is: a kind of series-connected batteries bidirectional energy equalizer based on the two-way brachium pontis of Cuk chopper circuit, comprises for gating by the bidirectional 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 two-way Cuk circuit, is made up of inductance L 1, inductance L 2, electric capacity C, voltage source E, two master switch Q1 and Q2; 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 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 lower floor n 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 positive pole of voltage source E with one end of master switch Q1, one end of master switch Q2; 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, and the other end of master switch Q2 is connected with one end of inductance L 2 with the other end of electric capacity C simultaneously, and the other end of inductance L 2 is connected with the negative pole of voltage source 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 S1 and S2 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 the series-connected batteries bidirectional energy equalizer of the two-way brachium pontis of Cuk chopper circuit,
When the battery pack of the cell composition of n series connection is in electric discharge or static condition, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from battery Cellj to equalizer;
When the battery pack of the cell composition of n series connection is in electric discharge or static 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, equalizing circuit is typical Cuk chopper circuit, now Celli is in the output of Cuk 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, equalizing circuit is typical Cuk chopper circuit, now Cellj is in the input of Cuk circuit, cell Cellj is by balanced discharge, and balanced discharge current continuity, current value are controlled.
Operation principle of the present invention is:
In the present invention with inductance L 1, L2 and electric capacity C for energy-storage travelling wave tube, equalizing circuit is typical Cuk circuit, controls balanced energy is shifted between cell and equalizing circuit by the PWM of switch.Power switch in equalizing circuit all adopts inverse conductivity type power switch, based on typical Cuk chopper circuit operation principle, discharging current by reducing voltage in battery pack or the minimum cell of SOC during battery power discharge improves the discharge capacity of whole battery pack, and the charging current by reducing voltage in battery pack or the highest cell of SOC during batteries charging improves the charging capacity of whole battery pack.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 Cuk chopper circuit by the cell of equilibrium, its equalization discharge electric current is continuous within the PWM cycle; Battery power discharge or standing time, be in the output of Cuk chopper circuit by the cell of equilibrium, its charge balancing electric current within the PWM cycle continuously.Between equalizing stage, except by the cell of equilibrium, all unaffected with other cell in group.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;
Equalizing circuit fundamental diagram when Fig. 2 is batteries charging;
Fig. 3 is the waveform correlation figure of balancing procedure shown in Fig. 2;
Equalizing 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 series-connected batteries bidirectional energy equalizer based on the two-way brachium pontis of Cuk chopper circuit, comprises for gating by the bidirectional 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 two-way Cuk circuit, is made up of inductance L 1, inductance L 2, electric capacity C, voltage source E, two master switch Q1 and Q2; 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 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 lower floor n 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 positive pole of voltage source E with one end of master switch Q1, one end of master switch Q2; 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, and the other end of master switch Q2 is connected with one end of inductance L 2 with the other end of electric capacity C simultaneously, and the other end of inductance L 2 is connected with the negative pole of voltage source 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 S1 and S2 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 the series-connected batteries bidirectional energy equalizer of the two-way brachium pontis of Cuk chopper circuit,
When the battery pack of the cell composition of n series connection is in electric discharge or static condition, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from battery Cellj to equalizer;
When the battery pack of the cell composition of n series connection is in electric discharge or static 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, equalizing circuit is typical Cuk chopper circuit, now Celli is in the output of Cuk 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, equalizing circuit is typical Cuk chopper circuit, now Cellj is in the input of Cuk circuit, cell Cellj is by balanced discharge, and balanced discharge current continuity, current value are 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 voltage source 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 inductance L 2, electric capacity C, master switch Q1 and voltage source E; 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, 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 " representative switch is in conducting state, and " off " representation switch is in off state, and i is battery Cell2 balanced discharge current waveform.Equalizing circuit is typical Cuk chopper circuit, is in the input of Cuk 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 the highest, 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 electric capacity C, inductance L 1, switch N21, diode DN22, cell Cell2, switch S 21, diode DS22 and master switch Q2; When master switch Q2 turns off, 4. 3. loop be simultaneously activated with loop, wherein loop is 3. successively through voltage source E, diode D1, electric capacity C and inductance L 2, 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 equalizing circuit is typical Cuk chopper circuit, is in the output of Cuk 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 series-connected batteries bidirectional energy equalizer based on the two-way brachium pontis of Cuk chopper circuit, comprises for gating by the bidirectional 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 two-way Cuk circuit, is made up of inductance L 1, inductance L 2, electric capacity C, voltage source E, two master switch Q1 and Q2; 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 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 lower floor n 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 positive pole of voltage source E with one end of master switch Q1, one end of master switch Q2; 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, and the other end of master switch Q2 is connected with one end of inductance L 2 with the other end of electric capacity C simultaneously, and the other end of inductance L 2 is connected with the negative pole of voltage source 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 S1 and S2 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 the series-connected batteries bidirectional energy equalizer of the two-way brachium pontis of Cuk chopper circuit,
When the battery pack of the cell composition of n series connection is in electric discharge or static condition, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from battery Cellj to equalizer;
When the battery pack of the cell composition of n series connection is in electric discharge or static 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, equalizing circuit is typical Cuk chopper circuit, now Celli is in the output of Cuk 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, equalizing circuit is typical Cuk chopper circuit, now Cellj is in the input of Cuk circuit, cell Cellj is by balanced discharge, and balanced discharge current continuity, current value are controlled.
Embodiment 3: as Figure 1-5, a kind of series-connected batteries bidirectional energy equalizer based on the two-way brachium pontis of Cuk chopper circuit, comprises for gating by the bidirectional 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 two-way Cuk circuit, is made up of inductance L 1, inductance L 2, electric capacity C, voltage source E, two master switch Q1 and Q2; 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 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 lower floor n 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 positive pole of voltage source E with one end of master switch Q1, one end of master switch Q2; 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, and the other end of master switch Q2 is connected with one end of inductance L 2 with the other end of electric capacity C simultaneously, and the other end of inductance L 2 is connected with the negative pole of voltage source 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 S1 and S2 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 the series-connected batteries bidirectional energy equalizer of the two-way brachium pontis of Cuk chopper circuit,
When the battery pack of the cell composition of n series connection is in electric discharge or static condition, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from battery Cellj to equalizer;
When the battery pack of the cell composition of n series connection is in electric discharge or static 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, equalizing circuit is typical Cuk chopper circuit, now Celli is in the output of Cuk 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, equalizing circuit is typical Cuk chopper circuit, now Cellj is in the input of Cuk circuit, cell Cellj is by balanced discharge, and balanced discharge current continuity, current value are controlled.
Embodiment 4: as Figure 1-5, a kind of series-connected batteries bidirectional energy equalizer based on the two-way brachium pontis of Cuk chopper circuit, comprises brachium pontis power switch matrix N, lower brachium pontis power switch matrix S, inductance L, voltage source E, two master switch M1 and M2; Wherein go up brachium pontis power switch matrix N and the double-deck power switch matrix of lower brachium pontis power 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 is all connected with one end of inductance L and the n bar lead-out wire of the lower end of its lower floor n 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 lower floor n switch of lower brachium pontis 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 M2; The other end of master switch M2 is connected with the other end of inductance L with one end of M1 simultaneously, and the other end of master switch M1 is connected with the positive pole of voltage source E.
Described upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S, master switch M1 and M2 are inverse conductivity type device for power switching.
Described upper brachium pontis power switch matrix N is made up of antiparallel double-deck power switch N1 and N2 n, upper strata power switch N1 by power switch N11 ..., Nn1 form, lower floor power switch N2 by power switch N12 ..., Nn2 is formed; Described lower brachium pontis power switch matrix S is made up of antiparallel double-deck power switch S1 and S2 n, upper strata power switch S1 by power switch S11 ... Sn1 form, lower floor power switch S2 by power switch S12 ... Sn2 is formed, and n is the number of cell in battery pack.
Based on a control method for the series-connected batteries bidirectional energy equalizer of the two-way brachium pontis of Cuk chopper circuit,
When the battery pack of the cell composition of n series connection is in electric discharge or static condition, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from battery Cellj to equalizer;
When the battery pack of the cell composition of n series connection is in electric discharge or static 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, equalizing circuit is typical Cuk chopper circuit, now Celli is in the output of Cuk 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, equalizing circuit is typical Cuk chopper circuit, now Cellj is in the input of Cuk circuit, cell Cellj is by balanced discharge, and balanced discharge current continuity, current value are controlled.
Embodiment 5: as Figure 1-5, a kind of series-connected batteries bidirectional energy equalizer based on the two-way brachium pontis of Cuk chopper circuit, comprises brachium pontis power switch matrix N, lower brachium pontis power switch matrix S, inductance L, voltage source E, two master switch M1 and M2; Wherein go up brachium pontis power switch matrix N and the double-deck power switch matrix of lower brachium pontis power 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 is all connected with one end of inductance L and the n bar lead-out wire of the lower end of its lower floor n 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 lower floor n switch of lower brachium pontis 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 M2; The other end of master switch M2 is connected with the other end of inductance L with one end of M1 simultaneously, and the other end of master switch M1 is connected with the positive pole of voltage source E.
Described upper brachium pontis power switch matrix N, lower brachium pontis power switch matrix S, master switch M1 and M2 are inverse conductivity type device for power switching.
Based on a control method for the series-connected batteries bidirectional energy equalizer of the two-way brachium pontis of Cuk chopper circuit,
When the battery pack of the cell composition of n series connection is in electric discharge or static condition, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from battery Cellj to equalizer;
When the battery pack of the cell composition of n series connection is in electric discharge or static 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, equalizing circuit is typical Cuk chopper circuit, now Celli is in the output of Cuk 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, equalizing circuit is typical Cuk chopper circuit, now Cellj is in the input of Cuk circuit, cell Cellj is by balanced discharge, and balanced discharge current continuity, current value are controlled.
Embodiment 6: as Figure 1-5, a kind of series-connected batteries bidirectional energy equalizer based on the two-way brachium pontis of Cuk chopper circuit, comprises brachium pontis power switch matrix N, lower brachium pontis power switch matrix S, inductance L, voltage source E, two master switch M1 and M2; Wherein go up brachium pontis power switch matrix N and the double-deck power switch matrix of lower brachium pontis power 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 is all connected with one end of inductance L and the n bar lead-out wire of the lower end of its lower floor n 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 lower floor n switch of lower brachium pontis 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 M2; The other end of master switch M2 is connected with the other end of inductance L with one end of M1 simultaneously, and the other end of master switch M1 is connected with the positive pole of voltage source E.
Based on a control method for the series-connected batteries bidirectional energy equalizer of the two-way brachium pontis of Cuk chopper circuit,
When the battery pack of the cell composition of n series connection is in electric discharge or static condition, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from battery Cellj to equalizer;
When the battery pack of the cell composition of n series connection is in electric discharge or static 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, equalizing circuit is typical Cuk chopper circuit, now Celli is in the output of Cuk 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, equalizing circuit is typical Cuk chopper circuit, now Cellj is in the input of Cuk circuit, cell Cellj is by balanced discharge, and balanced discharge current continuity, current value are controlled.
Embodiment 7: as Figure 1-5, a kind of control method of the series-connected batteries bidirectional energy equalizer based on the two-way brachium pontis of Cuk chopper circuit,
When the battery pack of the cell composition of n series connection is in electric discharge or static condition, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from battery Cellj to equalizer;
When the battery pack of the cell composition of n series connection is in electric discharge or static 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, equalizing circuit is typical Cuk chopper circuit, now Celli is in the output of Cuk 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, equalizing circuit is typical Cuk chopper circuit, now Cellj is in the input of Cuk circuit, cell Cellj is by balanced discharge, and balanced discharge current continuity, current value are controlled.
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 (5)
1. based on a series-connected batteries bidirectional energy equalizer for the two-way brachium pontis of Cuk chopper circuit, it is characterized in that: comprise for gating by the bidirectional 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 two-way Cuk circuit, is made up of inductance L 1, inductance L 2, electric capacity C, voltage source E, two master switch Q1 and Q2; 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 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 lower floor n 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 positive pole of voltage source E with one end of master switch Q1, one end of master switch Q2; 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, and the other end of master switch Q2 is connected with one end of inductance L 2 with the other end of electric capacity C simultaneously, and the other end of inductance L 2 is connected with the negative pole of voltage source E.
2. the series-connected batteries bidirectional energy equalizer based on the two-way brachium pontis of Cuk chopper circuit according to claim 1, 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. the series-connected batteries bidirectional energy equalizer based on the two-way brachium pontis of Cuk chopper circuit according to claim 1, 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 S1 and S2 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. the series-connected batteries bidirectional energy equalizer based on the two-way brachium pontis of Cuk chopper circuit according to claim 1, is characterized in that: described voltage source E to be provided through DC/DC by battery pack or batteries beyond battery pack provides.
5. a control method for the series-connected batteries bidirectional energy equalizer based on the two-way brachium pontis of Cuk chopper circuit 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 electric discharge or static condition, i-th battery Celli in battery pack with minimum state-of-charge or least significant end voltage is charged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from equalizer to battery Celli; When the battery pack of the cell composition of n series connection is in charged state, a jth battery Cellj in battery pack with the most highly charged state or most significant end voltage is discharged by equalizing circuit, and all unaffected with other all cell in group, balanced energy shifts from battery Cellj to equalizer;
When the battery pack of the cell composition of n series connection is in electric discharge or static 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, equalizing circuit is typical Cuk chopper circuit, now Celli is in the output of Cuk 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, equalizing circuit is typical Cuk chopper circuit, now Cellj is in the input of Cuk circuit, cell Cellj is by balanced discharge, and balanced discharge current continuity, current value are controlled.
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| CN111033933A (en) * | 2018-10-30 | 2020-04-17 | Oppo广东移动通信有限公司 | Charging control device, equipment to be charged and charging control method |
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