WO2018107963A1 - 一种基于电感储能的串联电池组双向无损均衡的改良电路 - Google Patents
一种基于电感储能的串联电池组双向无损均衡的改良电路 Download PDFInfo
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- WO2018107963A1 WO2018107963A1 PCT/CN2017/113370 CN2017113370W WO2018107963A1 WO 2018107963 A1 WO2018107963 A1 WO 2018107963A1 CN 2017113370 W CN2017113370 W CN 2017113370W WO 2018107963 A1 WO2018107963 A1 WO 2018107963A1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/50—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially
- H02J7/52—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially for charge balancing, e.g. equalisation of charge between batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- the invention relates to the technical field of battery pack equalization, and in particular relates to an improved circuit for bidirectional lossless equalization of a series battery pack based on an inductor energy storage.
- the distribution of the remaining capacity of each battery cell generally occurs in three cases: the remaining capacity of some battery cells is relatively high; the remaining capacity of some battery cells is low; The remaining capacity of some battery cells is too high and the remaining capacity of some battery cells is low.
- the method of equalization control of lithium-ion battery packs can be divided into two categories: energy dissipative type and energy non-dissipative type according to the energy consumption of the circuit in the equalization process; according to the equalization function classification, it can be divided into charging equalization and discharging. Equilibrium and dynamic equilibrium. Charging equalization refers to the equalization during the charging process. Generally, the equalization is started when the battery cell voltage reaches the set value, and the overcharge is prevented by reducing the charging current.
- the discharge equalization refers to the equalization during the discharge process, and the remaining Low-energy battery cells supplement energy to prevent over-discharge; dynamic equalization combines the advantages of charge equalization and discharge equalization, and refers to the equalization of the battery pack during the entire charge and discharge process.
- the object of the present invention is to solve the above-mentioned drawbacks in the prior art, and to provide an improved circuit for bidirectional lossless equalization of a series battery pack based on inductive energy storage, through a battery tube in a series battery pack
- An equalization circuit is used in the system to ensure that the cells in the battery pack do not overcharge and overdischarge during charging and discharging, improve the imbalance of the series battery pack, improve the available capacity of the battery pack, and reduce the series battery.
- the maintenance and replacement cycle of the group extends the life of the battery pack and reduces the operating costs of hybrid vehicles, electric vehicles and storage power stations.
- An improved circuit for bidirectional lossless equalization of a series battery pack based on inductive energy storage, during charging, when any one or more continuous battery cells in the left part of the battery pack is too high (see Figures 1 and 3 ( a), battery B l1 and battery B l2 are continuous battery cells, battery B l1 and battery B l2 and battery B l3 are continuous battery cells, that is, in the left part of the battery pack, any one or more consecutive
- the battery cell which is referred to as a continuous battery in the present invention, can be appropriately regarded as a whole in the equalization process.
- the right part of the battery pack has the same meaning as the continuous battery, and one or more continuous energies can be passed.
- the high monomer is regarded as a whole, and the overall energy is equalized to the whole of the right part of the battery corresponding to the whole.
- the battery B l1 in the left part corresponds to the right.
- Part of the battery B r1 , the left part of the battery B l1 and B l2 composed of the whole corresponds to the whole of the right part of the battery B r1 and B r2 . That is, the left part of any continuous one or more battery cells
- the definition of continuous inductor is the same as the definition of continuous battery.
- the right part of the battery corresponds to the definition of the left part of the battery); the equalization principle of the right part and The left part is the same.
- one or more low energy monomers may be considered as a single unit when one or more of the continuous battery cells in the left portion of the battery pack are too low in energy.
- the energy of the right part of the energy corresponding to the low energy is not too low, the energy of the right part of the battery corresponding to the low energy of the whole and any battery continuous with the batteries can be balanced. The energy is too low overall.
- the equalization must be achieved in two steps. First, the energy of one or more consecutive battery cells with high energy in the left part is equalized to the right part. The battery is raised to increase the voltage of the battery in the right portion, and then equalized by the above-described discharge equalization method. The principle of equalization in the right part is the same as in the left part.
- the improved circuit for bidirectional lossless equalization of the series battery pack is composed of a series battery pack, an equalization circuit, and a control circuit.
- the series battery components are left and right parts, the left part battery cell is the left battery group, and the right part battery cell is the right battery group; when the total number of battery cells is 2n (n is a positive integer), the left and right parts
- the number of battery cells is n, when the total number of battery cells is 2n+1 (n is a positive integer), the number of cells in the left battery pack is n, the number of cells in the right battery pack is n+1, and the left battery pack can also be used.
- the number of cells is n+1, and the number of cells in the right battery cell is n.
- the number of cells in the left battery cell is n
- the number of cells in the right battery cell is n+1
- the left battery cells are named B l1 , B l2 , B l3 , ... B ln from top to bottom respectively, when the total number of battery cells
- the right battery cells are named B r1 , B r2 , B r3 , ... B rn from top to bottom respectively.
- the total number of battery cells is 2n+1, the right battery cells are from above.
- the lower ones are named B r0 , B r1 , B r2 , B r3 , ... B rn ; the positive pole of B l1 is connected to V CC.
- the negative pole of B r1 is connected to GND, when the battery cell
- B r The negative pole of 0 is connected to GND; the number of batteries is not limited, but as the number of batteries increases, the equalization control will become complicated accordingly.
- the switching frequency of the triac TRIAC may not meet the requirements, and the requirements for the energy storage inductor will also be Correspondingly, it should be selected according to the actual situation.
- the number of energy storage inductors L in the equalization circuit is n, which are named L 1 , L 2 ... L n from top to bottom respectively; when the number of batteries is 2n+1, the storage in the equalization circuit
- the number of inductors L is n+1, which is named L 0 , L 1 ... L n from top to bottom respectively; parallel with the number of triac TRIACs such as inductors at both ends of the inductor, and the remaining two-way thyristor TRIAC end Connected to one end of the storage inductor L and connected to one end of the battery.
- the control terminal of the triac TRIAC is connected to the control circuit, so that the turn-on and turn-off of the triac TRIAC is controlled by the control circuit;
- the number of triac TRIACs is 3n+2
- the parallel thyristors are named S 1 , S 2 ... S n from top to bottom
- the two-way controllable connection with the left battery pack Silicon is named S l1 , S l2 ... S l(n+1) from top to bottom
- the control circuit in Figure 1 contains the microcontroller and all the triac TRIAC drive circuits. By programming the microcontroller in the control circuit, the current battery is analyzed and the control strategy should be used to equalize the circuit. Through the driving circuit in the control circuit, the gate voltage of the triac TRIAC can be appropriately supplied with the driving voltage or the shutdown voltage, so that the triac TRIAC can be turned on or off according to actual needs, thereby achieving the purpose of balancing the battery power. .
- the current passes through the inductors L i , L i+1 ...
- a continuous battery as a whole can provide energy for B li , B l(i+1) ... B l(i+w) .
- the overall battery is B r(ip) , B r(i-p+1) ...
- the bidirectional thyristor in parallel with the inductor, B r(ip) , B r(i-p+1) ... B r(i+q+w) discharge is the inductance L i , L i+1 ...
- the equalization method of the other batteries is the same as when the number of batteries is 2n.
- the charging process if the battery B r0 terminal voltage is the highest, in order to avoid overcharging B r0 , the triac TRIACS r0 and S r1 are turned on in one PWM cycle, then the current passes through S r1 , the storage inductor L 0 , S r0 and B r0 discharge, storing energy for the inductance L 0 .
- the triac TRIACS l0 and S ln are turned on in one PWM cycle, and the triac S 1 is turned on at the same time.
- S 2 ... S n then the current passes through S l0 , the storage inductors L 0 , S 1 , S 2 ... S n , S ln and B ln , B l(n-1) ...
- B l1 which is the inductance L 0 stores energy; S l0 and S ln turn off after a period of time, and simultaneously open S r0 and S r1 , at which time the current passes through the inductors L 0 , S r1 , the batteries B r0 and S r0 , and the inductor L 0 releases energy to B r0 , the transfer of energy from B l1 , B l2 ... B ln to B r0 is realized.
- the invention adopts the above-mentioned non-destructive dynamic battery equalization technology in the series battery cell management system, can ensure that each battery does not overcharge and overdischarge during charging and discharging, improves the imbalance of the series battery pack, and improves the battery pack.
- the available capacity extends the life of the battery pack and reduces the cost of the battery energy storage system in hybrid vehicles, electric vehicles and power stations.
- 1 is a circuit schematic diagram of an improved circuit for bidirectional lossless equalization of a series-connected battery pack based on an inductive energy storage when the number of batteries is 2n;
- FIG. 2 is a circuit schematic diagram of an improved circuit for bidirectional lossless equalization of an inductive energy storage-based series battery pack when the number of batteries is 2n+1;
- Fig. 3(a) is a schematic diagram showing the working process of inductive charging during charging in the case of a battery with a number of 2n;
- Fig. 3(b) is a schematic diagram showing the working process of the inductor discharge during the charging process with 4 batteries as an example
- Figure 4 (a) is a schematic diagram of the working process of inductive charging during charging in the case of a battery with a number of 2 n;
- Figure 4 (b) is a schematic diagram of the working process of the inductor discharge during the charging process with 4 batteries as an example
- Figure 5 (a) is a working principle diagram of the inductive charging of the battery B r0 during the charging process with the number of batteries being 2n+1;
- Figure 5 (b) is a working principle diagram of the inductor discharge of the battery B r0 during the charging process with the number of batteries being 2n+1;
- Figure 6 (a) is a working principle diagram of the inductive charging of the battery B r0 during the discharge process with the number of batteries being 2n+1;
- Figure 6 (b) is a working principle diagram of the inductor discharge of the battery B r0 during the discharge process with the number of batteries being 2n+1;
- Figure 7 is the voltage of each battery cell in the simulation experiment of equalization circuit charging with 4 batteries as an example.
- FIG. 8 is a voltage waveform diagram of each battery cell in an equalization circuit discharge simulation experiment using a four-cell battery as an example.
- Figure 1 is a schematic diagram of an equalization circuit when the number of batteries is 2n.
- the series battery components are left and right parts, the left part battery cell is the left battery group, the right part battery cell is the right battery group; the left and right part battery cells are all n; the left battery cell unit is from From top to bottom, they are named B l1 , B l2 , B l3 , ... B ln , and the right battery cells are named B r1 , B r2 , B r3 , ... B rn , B l1 from top to bottom.
- the positive pole is connected to V CC , and the negative pole of B r1 is connected to GND; the number of batteries is not limited, and n is a positive integer greater than or equal to 1, but as the number of batteries increases, the equalization control becomes complicated, and the switch of the triac TRIAC is complicated.
- the frequency may not meet the requirements, and the requirements for the energy storage inductance will be increased accordingly. It should be selected according to the actual situation.
- the number of energy storage inductors L in the equalization circuit is n, which are named L 1 , L 2 ...
- triac TRIACs such as inductors at both ends of the inductor, and other bidirectional controllable
- One end of the silicon TRIAC is connected to one end of the storage inductor L, and the other end is connected to one end of the battery.
- the control end of all the triac TRIAC is connected with the control circuit, so that the turn-on and turn-off of the triac TRIAC is controlled by the control circuit.
- the number of triac TRIACs is 3n+2, and the parallel triacs are named S 1 , S 2 ...
- the control circuit in the figure contains the microcontroller and all the drive circuits of the triac TRIAC.
- the driving circuit in the control circuit can provide the appropriate driving voltage or the shutdown voltage to the gate of the triac TRIAC, so that the triac TRIAC can be turned on or off according to actual needs, thereby achieving the purpose of balancing the battery power.
- Fig. 2 is a schematic diagram of an equalization circuit when the number of batteries is 2n+1.
- the serial battery components are left and right parts, the left part battery cell is the left battery group, the right part battery cell is the right battery group; the left battery cell number is n, and the right battery cell number is n +1, the left battery unit number is n+1, and the right battery unit number is n.
- the number of the left battery unit is n, and the right battery unit number is n+1.
- the left battery cells are named B l1 , B l2 , B l3 , ...
- B ln from top to bottom and the right battery cells are named B r0 , B r1 , B r2 , respectively from top to bottom.
- B r3 , ... B rn the positive pole of B l1 is connected to V CC , the negative pole of B r0 is connected to GND; the number of batteries is not limited, n is a positive integer greater than or equal to 1, but as the number of batteries increases, the equalization control will correspond accordingly As it becomes complicated, the switching frequency of the two-way thyristor TRIAC may not meet the requirements, and the requirements for the energy storage inductance will be correspondingly improved, and should be selected according to the actual situation.
- the number of energy storage inductors L in the equalization circuit is n+1, which are named L 0 , L 1 ... L n from top to bottom respectively; parallel with the number of triac TRIACs such as inductors at both ends of the inductor, and the remaining two directions
- One end of the thyristor TRIAC is connected to one end of the storage inductor L, and the other end is connected to one end of the battery.
- the control end of the triac TRIAC is connected to the control circuit, so that the turn-on and turn-off of the triac TRIAC is controlled by the control circuit.
- Control; the number of triac TRIACs is 3n+5, and the parallel thyristors are named S 0 , S 1 ...
- the control circuit in the figure contains the microcontroller and all the drive circuits of the triac TRIAC.
- the driving circuit in the control circuit can provide the appropriate driving voltage or the shutdown voltage to the gate of the triac TRIAC, so that the triac TRIAC can be turned on or off according to actual needs, thereby achieving the purpose of balancing the battery power.
- Fig. 3(a) is a schematic diagram showing the working process of the inductor charging during the charging process with 4 batteries as an example when the number of batteries is 2n.
- the total number of battery cells is 4, the number of cells in the left and right parts is 2, and the cells in the left battery cells are named B l1 and B l2 from top to bottom, and the cells of the left battery are named B from top to bottom.
- R1 and B r2 the inductances are named L 1 and L 2 from top to bottom.
- the triacs TRIACS l1 and S l2 are turned on in one PWM cycle, and the current passes through S l1 .
- the energy storage inductors L 1 , S l2 and B l1 , B l1 discharge store energy for the inductor L 1 .
- Fig. 3(b) is a schematic diagram showing the working process of the inductor discharge during the charging process with four batteries as an example when the number of batteries is 2n.
- the total number of battery cells is 4, the number of cells in the left and right parts is 2, and the cells in the left battery cells are named B l1 and B l2 from top to bottom, and the cells of the left battery are named B from top to bottom.
- R1 and B r2 the inductances are named L 1 and L 2 from top to bottom. Release the energy stored by L 1 to B r1 in one PWM cycle with Figure 3(a).
- Fig. 4(a) is a schematic diagram showing the working process of the inductor charging during the charging process with four batteries as an example when the number of batteries is 2n.
- the total number of battery cells is 4, the number of cells in the left and right parts is 2, and the cells in the left battery cells are named B l1 and B l2 from top to bottom, and the cells of the left battery are named B from top to bottom.
- R1 and B r2 the inductances are named L 1 and L 2 from top to bottom.
- the triacs TRIACS r1 and S r3 are turned on in one PWM cycle, and S 2 is turned on at the same time, and the current passes through S r3 , S 2 , the storage inductors L 1 , S r1 , and B r1 and B r2 , B r1 and B r2 discharge store energy for the inductance L 1 .
- Fig. 4(b) is a schematic diagram showing the working process of the inductor discharge during the charging process with four batteries as an example when the number of batteries is 2n.
- the total number of battery cells is 4, the number of cells in the left and right parts is 2, and the cells in the left battery cells are named B l1 and B l2 from top to bottom, and the cells of the left battery are named B from top to bottom.
- R1 and B r2 the inductances are named L 1 and L 2 from top to bottom.
- S r1 , S r3 and S 2 are turned off after a certain period of time, and S l1 and S l2 are turned on at the same time.
- the current passes through the inductors L 1 , S l1 , and battery B. L1 and S l2 , the inductor L 1 releases energy to B l1 , realizing the transfer of energy from B r1 and B r2 to B l1 .
- Fig. 5(a) is a schematic diagram showing the operation of inductive charging of the battery B r0 during the charging process with the number of batteries being 2n+1.
- the total number of battery cells is 5, the number of cells in the left part is 2, and the number of cells in the right part is 3.
- the left battery cells are named B l1 and B l2 from top to bottom, and the right battery cells are named B r0 , B r1 , and B r2 from top to bottom.
- the inductors are named L from top to bottom.
- the number of triac TRIAC is 11, and the parallel thyristor parallel to the inductor is named S 0 , S 1 , S 2 from top to bottom, and is connected to the left battery pack.
- the thyristors are named S l0 , S l1 , S l2 from top to bottom respectively, and the triacs connected to the right battery group are named S r0 , S r1 , S r2 from top to bottom.
- the triac TRIACS r0 and S r1 are turned on in one PWM cycle, then the current passes through S r1 , the storage inductor L 0 , S r0 and B r0 discharge, storing energy for the inductance L 0 .
- Fig. 5(b) is a schematic diagram showing the operation of the inductor Br0 in the charging process during the charging process with the number of batteries being 2n+1.
- the total number of battery cells is 5, the number of cells in the left part is 2, and the number of cells in the right part is 3.
- the left battery cells are named B l1 and B l2 from top to bottom, and the right battery cells are named B r0 , B r1 , and B r2 from top to bottom.
- the inductors are named L from top to bottom.
- the current passes through the inductors L 0 , S l0 , the battery B l1 , S L2 and the inductor L 1 , the inductor L 0 releases energy to B l1 , and realizes the transfer of energy from B r0 to B l1 .
- Fig. 6(a) is a schematic diagram showing the operation of inductive charging of the battery Br0 during the discharge process with the number of batteries being 2n+1.
- the total number of battery cells is 5, the number of cells in the left part is 2, and the number of cells in the right part is 3.
- the left battery cells are named B l1 and B l2 from top to bottom, and the right battery cells are named B r0 , B r1 , and B r2 from top to bottom.
- the inductors are named L from top to bottom. 0 , L 1 , L 2 , the number of triac TRIAC is 11, and the parallel thyristor parallel to the inductor is named S 0 , S 1 , S 2 from top to bottom, and is connected to the left battery pack.
- the thyristors are named S l0 , S l1 , S l2 from top to bottom respectively, and the triacs connected to the right battery group are named S r0 , S r1 , S r2 from top to bottom.
- the triac TRIACS l0 and S l3 are turned on in one PWM cycle, and S 1 and S 2 are turned on at the same time.
- Energy is stored for the inductance L 0 by S 10 , the inductances L 0 , S 1 , S 2 , S l3 and the batteries B l2 and B l1 .
- Fig. 6(b) is a schematic diagram showing the operation of the inductor discharge during the discharge of the battery Br0, which is exemplified by a five-cell battery when the number of batteries is 2n+1.
- the total number of battery cells is 5, the number of cells in the left part is 2, and the number of cells in the right part is 3.
- the left battery cells are named B l1 and B l2 from top to bottom, and the right battery cells are named B r0 , B r1 , and B r2 from top to bottom.
- the inductors are named L from top to bottom.
- the number of triac TRIAC is 11, and the parallel thyristor parallel to the inductor is named S 0 , S 1 , S 2 from top to bottom, and is connected to the left battery pack.
- the thyristors are named S l0 , S l1 , S l2 from top to bottom, and the triacs connected to the right battery are named S r0 , S r1 , S r x from top to bottom.
- FIG. 7 is a voltage waveform diagram of each battery cell in an equalization circuit charging simulation experiment using a four-cell battery as an example. Under the condition of setting a certain control precision, each battery cell realizes voltage equalization through an equalization circuit.
- FIG. 8 is a voltage waveform diagram of each battery cell in an equalization circuit discharge simulation experiment using a four-cell battery as an example. Under the condition of setting a certain control precision, each battery cell realizes voltage equalization through an equalization circuit.
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Abstract
Description
Claims (7)
- 一种基于电感储能的串联电池组双向无损均衡的改良电路,其特征在于,所述改良电路包括:串联电池组、均衡电路和控制电路,其中所述串联电池组包括分为左、右两部分,左部分电池单体为左电池组,右部分电池单体为右电池组,所述左电池组与所述右电池组串联在一起,所述左电池组与所述右电池组通过中间的所述均衡电路连接起来,所述均衡电路又与所述控制电路相连接,所述控制电路通过控制所述均衡电路中双向可控硅TRIAC的通断与储能电感的储能作用,实现所述串联电池组充放电过程中的动态均衡。
- 根据权利要求1所述的一种基于电感储能的串联电池组双向无损均衡的改良电路,其特征在于,当所述串联电池组中电池单体总数为2n时(n为正整数),所述左电池组和所述右电池组中电池单体数均为n,当所述串联电池组中电池单体总数为2n+1时(n为正整数),若所述左电池组中电池单体数为n,则所述右电池组中电池单体数为n+1,若所述左电池组中电池单体数为n+1,则所述右电池组中电池单体数为n。
- 根据权利要求2所述的一种基于电感储能的串联电池组双向无损均衡的改良电路,其特征在于,当所述串联电池组中电池单体总数为2n时,所述左电池组中电池单体从上至下分别命名为Bl1、Bl2、Bl3、……Bln,并且Bl1、Bl2、Bl3、……Bln依次串联;所述右电池组中电池单体从上至下分别命名为Br1、Br2、Br3、……Brn,并且Br1、Br2、Br3、……Brn依次串联;其中,Bl1的正极接VCC,Br1的负极接GND;所述均衡的改良电路中的储能电感L数量为n,由上至下分别命名为L1、L2……Ln,并且L1、L2……Ln依次串联;所述均衡电路中的双向可控硅TRIAC的数量为3n+2,其中有n个双向可控硅TRIAC由上至下分别命名为S1、S2……Sn,S1、S2……Sn依次串联,并且S1、S2……Sn分别并联在储能电感L1、L2……Ln两端;其中还有n+1个双向可控硅TRIAC由上至下分别命名为Sl1、Sl2……Sl(n+1),Sl1、Sl2……Sln的T1端分别和储能电感L1、L2……Ln的上端相连,Sl(n+1)的T1端和储能电感Ln的下端相连,Sl1、Sl2……Sln的T2端和电池单体Bl1、Bl2、Bl3、……Bln的正端相连,Sl(n+1)的T2端和电池单体Bln的负端相连;其中剩下的n+1个双向可控硅TRIAC由上至下分别命名为Sr1、Sr2……Sr(n+1),Sr1、Sr2……Srn的T1端分别和储能电感L1、L2……Ln的上端相连,Sr(n+1)的T1端和储能电感Ln的下端相连,Sr1、Sr2……Srn的T2端和电池单体Br1、Br2、Br3、……Brn的负端相连,Sr(n+1)的T2端和电池单体Brn的正端相连;所有双向可控硅TRIAC的门极都与所述控制电路相连接,使所有双向可控硅TRIAC的开通和关断由控制电路控制。
- 根据权利要求2所述的一种基于电感储能的串联电池组双向无损均衡的改良电路,其特征在于,当所述串联电池组中电池单体总数为2n+1时,所述左电池组中电池单体数为n,从上至下分别命名为Bl1、Bl2、Bl3、……Bln,并且Bl1、Bl2、Bl3、……Bln依次串联;所述右电池组中电池单体数为n+1,从上至下分别命名为Br0、Br1、Br2、Br3、……Brn,并且Br0、Br1、Br2、Br3、……Brn依次串联;其中,Bl1的正极接VCC,Br0的负极接GND;所述均衡的改良电路中的储能电感L数量为为n+1,由上至下分别命名为L0、L1……Ln,L0、L1、L2……Ln依次串联;所述均衡电路中的双向可控硅TRIAC的数量为3n+5,其中有n+1个双向可控硅TRIAC由上至下 分别命名为S0、S1、S2……Sn,S0、S1、S2……Sn依次串联,并且S0、S1、S2……Sn分别并联在电感L0、L1、L2……Ln两端;其中还有n+2个双向可控硅TRIAC由上至下分别命名为Sl0、Sl1、Sl2……Sl(n+1),Sl0、Sl1、Sl2……Sln的T1端分别和储能电感L0、L1、L2……Ln的上端相连,Sl(n+1)的T1端和储能电感Ln的下端相连,Sl1、Sl2……Sln的T2端和电池Bl1、Bl2、Bl3、……Bln的正端相连,Sl0的T2端和电池Bl1的正端相连,Sl(n+1)的T2端和电池Bln的负端相连;其中剩下的n+2个双向可控硅TRIAC由上至下分别命名为Sr0、Sr1、Sr2……Sr(n+1),Sr0、Sr1、Sr2……Srn的T1端分别和储能电感L0、L1、L2……Ln的上端相连,Sr(n+1)的T1端和储能电感Ln的下端相连,Sr1、Sr2……Srn的T2端和电池Br1、Br2、Br3、……Brn的负端相连,Sr0的T2端和电池Br1的负端相连,Sr(n+1)的T2端和电池Brn的正端相连;所有双向可控硅TRIAC的门极都与所述控制电路相连接,使所有双向可控硅TRIAC的开通和关断由控制电路控制。
- 根据权利要求1至4任一所述的一种基于电感储能的串联电池组双向无损均衡的改良电路,其特征在于,所述控制电路包含微控制器和所有双向可控硅TRIAC的驱动电路,通过对所述微控制器编程,来分析所述串联电池组中各电池单体的电量并决定所述均衡电路的控制策略;所述驱动电路给双向可控硅TRIAC的门极提供适当的驱动电压或者关断电压,让双向可控硅TRIAC按照实际需求开启或者关闭。
- 根据权利要求1至4任一所述的一种基于电感储能的串联电池组双向无损均衡的改良电路,其特征在于,所述控制电路中控制信号的频率的大小根据所控制的电路储能电感L的电感值、双向可控硅TRIAC的开关损耗、电池单体电压、电池单体容量而定。
- 根据权利要求1至4任一所述的一种基于电感储能的串联电池组双向无损均衡的改良电路,其特征在于,所述串联电池组中电池为铅酸电池、锂离子电池、镍氢电池、超级电容器等二次电池。
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| CN108306352A (zh) * | 2017-12-01 | 2018-07-20 | 东莞市德尔能新能源股份有限公司 | 基于电感的储能电池组无损均衡改良电路及其均衡方法 |
| CN108183519A (zh) * | 2017-12-01 | 2018-06-19 | 东莞市德尔能新能源股份有限公司 | 一种基于电感的储能电池组无损均衡电路及其均衡方法 |
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