CN204376462U - The efficient equalizer topological circuit of a kind of double-deck brachium pontis series-connected batteries - Google Patents
The efficient equalizer topological circuit of a kind of double-deck brachium pontis series-connected batteries Download PDFInfo
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- CN204376462U CN204376462U CN201420863021.1U CN201420863021U CN204376462U CN 204376462 U CN204376462 U CN 204376462U CN 201420863021 U CN201420863021 U CN 201420863021U CN 204376462 U CN204376462 U CN 204376462U
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- 239000011159 matrix material Substances 0.000 claims abstract description 64
- 238000000034 method Methods 0.000 abstract description 6
- 238000004146 energy storage Methods 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000178 monomer Substances 0.000 description 2
- 230000003068 static effect Effects 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
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000001939 inductive effect Effects 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
Abstract
The utility model relates to the efficient equalizer topological circuit of a kind of double-deck brachium pontis series-connected batteries, belongs to battery energy equalization technique field.The utility model 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; The upper end of wherein going up a upper strata n power switch of 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.The utility model topological circuit principle is simple; Controllability is strong, and equalization efficiency is high.
Description
Technical field
The utility model relates to the efficient equalizer topological circuit of a kind of double-deck brachium pontis series-connected batteries, belongs to 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, for the solution problem that energy consumption balance scheme equalization efficiency is low by no means, the utility model provides the efficient equalizer topological circuit of a kind of double-deck brachium pontis series-connected batteries, and this topological circuit principle is simple, strong to the control ability of euqalizing current, equalization efficiency is high.
The technical solution of the utility model is: the efficient equalizer topological circuit of a kind of double-deck brachium pontis series-connected batteries, 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 (power mosfet switch if any parasitic anti-paralleled diode).
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.
Described voltage source E to be provided through DC/DC by battery pack or batteries beyond battery pack provides.
Operation principle of the present utility model is:
Be energy-storage travelling wave tube with inductance L in the utility model, control 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 buck circuit operation principle and boost chopper 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.
When the battery pack of the cell composition of n series connection is in electric discharge or static condition, a jth battery Cellj 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 Cellj; When the battery pack of the cell composition of n series connection is in charged state, i-th battery Celli 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 Celli to equalizer;
When the battery pack of the cell composition of n series connection is in electric discharge or static condition: charge switch Nj1 and Sj1 of control Cellj is in conducting state always, PWM control is carried out to master switch M1, equalizing circuit is typical buck circuit, and Cellj is in the output of buck circuit, therefore Cellj all has equalizing charge electric current during master switch turn-on and turn-off;
When the battery pack of the cell composition of n series connection is in charged state: discharge switch Ni2 and Si2 of control Celli is in conducting state always, PWM control is carried out to master switch M2, equalizing circuit is typical boost chopper, and Celli is in the input of boost chopper, therefore Celli all has balanced discharge electric current during master switch turn-on and turn-off.
The beneficial effects of the utility model are: topological circuit principle is simple, during batteries charging, is in the input of boost chopper by the cell of equilibrium, and its equalization discharge electric current is continuous within the PWM cycle; Battery power discharge or standing time, be in the output of buck 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 the utility model topological circuit schematic diagram;
Equalizing circuit fundamental diagram when Fig. 2 is batteries charging;
Fig. 3 is the equivalent electric circuit of balancing procedure shown in Fig. 2;
Fig. 4 is the waveform correlation figure of balancing procedure shown in Fig. 2;
Equalizing circuit fundamental diagram when Fig. 5 is battery power discharge
Fig. 6 is the equivalent electric circuit of balancing procedure shown in Fig. 5;
Fig. 7 is the waveform correlation figure of balancing procedure shown in Fig. 5.
Embodiment
Embodiment 1: as shown in figs. 1-7, the efficient equalizer topological circuit of a kind of double-deck brachium pontis series-connected batteries, 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.
Described voltage source E to be provided through DC/DC by battery pack or batteries beyond battery pack provides.
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, time balanced: by loop 1., cell Cell2 releases energy, and inductance L energy storage; By loop 2., energy is shifted to voltage source E by inductance L.Namely time balanced by loop 1. with loop 2., energy is shifted to equalizing circuit by high voltage cell Cell2.
As shown in Figure 3,4, for equivalent equalizing circuit and the waveform correlation of Fig. 2, wherein U2 is the terminal voltage of cell Cell2, and " on " representative switch is in conducting state, " off " representation switch is in off state, and i is battery Cell2 balanced discharge current waveform.The equalizing circuit of equivalence is typical stepping-up/stepping-down chopper circuit, is in the input of boost chopper by the cell Cell2 of equilibrium.Time balanced, in controlled discharge switch matrix, discharge switch N22 and S22 of Cell2 is in conducting state always, and carries out PWM control to master switch M2.When switch M2 conducting, 1. loop is activated, and cell Cell2 discharges, inductive energy storage, on the electric current on inductance; When switch M2 disconnects, 2. loop is activated, and the energy on inductance is shifted to voltage source E by the anti-paralleled diode D1 of switch M1, and the electric current on inductance declines.
As shown in Figure 5, when battery pack is in discharge condition, suppose that the terminal voltage of cell Cell1 in battery pack is minimum, time balanced: 1. 2., energy is shifted to low-voltage cell Cell1 by equalizing circuit in loop by loop.
As shown in Figure 6,7, for equivalent equalizing circuit and the waveform correlation of Fig. 5, wherein U1 is the terminal voltage of cell Cell1, i is battery Cell1 equalizing charge current waveform, the equalizing circuit of equivalence is typical buck circuit, is in the output of buck circuit by the cell Cell1 of equilibrium.Time balanced, charge switch N11 and S11 controlling Cell1 in charging matrix is in conducting state always, and carries out PWM control to master switch M1.When switch M1 conducting, 1. loop is activated, and power supply E charges to cell Cell1, simultaneously inductance L L energy storage, on the electric current on inductance; When switch M1 disconnects, 2. loop is activated, and the energy on inductance is shifted to cell Cell1 by the anti-paralleled diode D2 of switch M2, and the electric current on inductance declines.
Embodiment 2: as shown in figs. 1-7, the efficient equalizer topological circuit of a kind of double-deck brachium pontis series-connected batteries, 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.
Described voltage source E is provided through DC/DC by battery pack.
Embodiment 3: as shown in figs. 1-7, the efficient equalizer topological circuit of a kind of double-deck brachium pontis series-connected batteries, 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.
Described voltage source E is provided by the batteries beyond battery pack.
Embodiment 4: as shown in figs. 1-7, the efficient equalizer topological circuit of a kind of double-deck brachium pontis series-connected batteries, 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.
Embodiment 5: as shown in figs. 1-7, the efficient equalizer topological circuit of a kind of double-deck brachium pontis series-connected batteries, 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.
By reference to the accompanying drawings embodiment of the present utility model is explained in detail above, but the utility model 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 the utility model aim.
Claims (4)
1. the efficient equalizer topological circuit of double-deck brachium pontis series-connected batteries, is characterized in that: comprise 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.
2. the efficient equalizer topological circuit of double-deck brachium pontis series-connected batteries 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 M1 and M2 are inverse conductivity type device for power switching.
3. the efficient equalizer topological circuit of double-deck brachium pontis series-connected batteries according to claim 2, it is characterized in that: 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 is by power switch N11, Nn1 is formed, 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.
4. the efficient equalizer topological circuit of double-deck brachium pontis series-connected batteries 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.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578288A (en) * | 2014-12-31 | 2015-04-29 | 昆明理工大学 | Double-level-bridge-arm series connection storage cell pack efficient equalizer topology circuit and control method thereof |
| CN105811030A (en) * | 2016-04-26 | 2016-07-27 | 昆明理工大学 | Lithium-ion battery system balancer and control method thereof |
| CN110962631A (en) * | 2018-12-29 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Battery heating system and control method thereof |
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2014
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578288A (en) * | 2014-12-31 | 2015-04-29 | 昆明理工大学 | Double-level-bridge-arm series connection storage cell pack efficient equalizer topology circuit and control method thereof |
| CN105811030A (en) * | 2016-04-26 | 2016-07-27 | 昆明理工大学 | Lithium-ion battery system balancer and control method thereof |
| CN105811030B (en) * | 2016-04-26 | 2019-09-27 | 昆明理工大学 | A kind of lithium-ion battery systems balanced device and its control method |
| CN110962631A (en) * | 2018-12-29 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Battery heating system and control method thereof |
| CN110962631B (en) * | 2018-12-29 | 2020-11-17 | 宁德时代新能源科技股份有限公司 | Battery heating system and control method thereof |
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