CN105304963A - Two-group storage battery balanced discharge control method for satellite power supply system - Google Patents
Two-group storage battery balanced discharge control method for satellite power supply system Download PDFInfo
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- CN105304963A CN105304963A CN201510180189.1A CN201510180189A CN105304963A CN 105304963 A CN105304963 A CN 105304963A CN 201510180189 A CN201510180189 A CN 201510180189A CN 105304963 A CN105304963 A CN 105304963A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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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
Abstract
The invention discloses a two-group storage battery balanced discharge control method for a satellite power supply system. On the basis of the conventional balanced control, direct control of discharge current of two groups of storage batteries is added, satellite on-orbital operational reliability requirements are considered, and a voltage regulator, storage battery discharge current sampling circuits, current error amplifying circuits and voltage error amplifying circuits adopt a 2-out-of-3 hot-redundant design manner. Therefore, when the voltages of the two groups of storage batteries are inconsistent or the circuit numbers of discharge adjusting circuits connected with the two groups of storage batteries are inconsistent, the two groups of storage batteries can still realize balanced discharge, the result can certainly be that the output current of the discharge adjusting circuit corresponding to one group of storage battery is greater than the output current of the discharge adjusting circuit corresponding to the other group of storage battery, and only if the output current is less than the current limiting value of the output current of one discharge adjusting circuit, the two groups of storage batteries can realize automatic balanced discharge.
Description
Technical field
The invention belongs to space power system field, be specifically related to a kind of satellite power system two group storage battery balanced discharge control method.
Background technology
Current satellite power system uses solar battery array-battery power supply system, general power-supply system is furnished with two group storage batteries, be responsible within the shade phase power satellite, along with satellite power demand is increasing, working life demands is more and more longer, to the long-life of satellite power system, high reliability and power output capacity require more and more higher, and affect the management of charging and discharging that one of key factor of the life and reliability of satellite power system is exactly storage battery, in order to the long-life use meeting satellite power system storage battery waits requirement, two group storage batteries need balanced discharge within the satellite shade phase, if two group storage battery electric discharges are uneven, cause a wherein group storage battery electric discharge too fast, another group storage battery discharged slow, long-time adding up will affect performance and the life-span of storage battery, this group storage battery will be caused time serious to break down.Therefore, satellite power system two group storage battery balanced discharge in satellite shade seems particular importance, the control of current satellite power system battery equalisation electric discharge mainly realizes the Balance route of two group storage battery discharging currents by the Balance route of the output current to the every road electric discharge of the Energy control unit corresponding to this group storage battery regulating circuit, its essence is the Balance route by the input power to Energy control unit every road electric discharge regulating circuit, but prerequisite be need guarantee two group storage battery be input to Energy control unit electric discharge regulating circuit port voltage equal, and electric discharge regulating circuit way corresponding to two group storage batteries is identical.Therefore, existing satellite power system has certain defect to the control technology that battery equalisation discharges:
(1) general satellite is on star during unit layout, consider the factor of heat and power, mostly power-supply system two group storage battery is distributed in the two ends of satellite capsule version, Energy control unit is placed on one end of a wherein group storage battery, this kind of layout causes two group storage batteries inconsistent to the stube cable length of Energy control unit electric discharge regulating circuit, even if therefore when satellite has just entered the shade phase, two group storage battery voltages are equal, electric discharge regulating circuit input port voltage corresponding to two group storage batteries is unequal, satellite load is larger, the electric discharge regulating circuit input terminal voltage difference that two group storage batteries are corresponding is larger, and existing satellite power system battery equalisation Control Technology of Discharge is the control for single channel electric discharge regulating circuit input power, when two group storage battery voltage differences are larger, the discharging current difference of two group storage batteries is also larger, the discharging current that battery tension is high is little, the discharging current that storage battery forces down is large, along with the life-span of time integral to storage battery has a significant impact, therefore power-supply system is when designing, General Requirements storage battery is consistent to the stube cable length of Energy control unit, by the lengthening that two groups of stube cables are short-and-medium, this measure can avoid the inconsistent battery discharging brought of cable length uneven, but cost is the weight increasing whole star.
(2) satellite in the course of the work, a joint monomer is wherein had to lose efficacy in a group storage battery, cause the output voltage of two group storage batteries inconsistent, the highest difference 4.25V, occur that the discharging current that battery tension is high is little equally, the discharging current that storage battery forces down is large, along with the life-span of time integral to storage battery has a significant impact, this problem does not temporarily have good solution on existing control technology basis, only have and reduce impact by alleviating whole star load within the satellite shade phase, but have a strong impact on the use of satellite.
(3) time inefficacy and exited supply network in electric discharge regulating circuit Zhong You mono-tunnel that wherein a group storage battery is corresponding, the electric discharge regulating circuit way that two group storage batteries are corresponding is inconsistent, balanced discharge due to existing satellite power system two group storage battery is the balanced discharge being realized storage battery by the control of the input power to every road electric discharge regulating circuit, therefore in this situation, two group storage battery power outputs are no longer identical, occur that two group storage battery electric discharges are no longer balanced, existing satellite power system in order to two group storage batteries in this case still can balanced discharge, need regulating circuit closedown of being discharged normally on a road in electric discharge regulating circuit corresponding for another group storage battery, to realize the coupling of electric discharge regulating circuit way, but result is that the power output capacity loss of power-supply system control unit is larger.
Summary of the invention
For the deficiencies in the prior art, the object of the invention is to overcome the deficiency in existing satellite power system two group storage battery balanced discharge control technology, the control method that a kind of satellite power system battery equalisation discharges is provided, in original technical foundation, increase the direct control to two group storage battery discharging currents, by detecting and controlling the error signal of two group storage battery discharging currents, the error of two group storage battery discharging currents is reduced gradually, realizes balanced discharge.
In order to realize object of the present invention, propose the control method of a kind of satellite power system battery equalisation electric discharge, adopt outer voltage, current inner loop double-loop control, two group storage battery Voltage Cortrol are that stable busbar voltage exports as power satellite by 8 tunnel electric discharge regulating circuit parallel operations, 8 tunnel electric discharge regulating circuits share an identical voltage regulator, every road electric discharge regulating circuit has independently electric current loop, bus sampled signal and reference signal input to voltage regulator computing, current error amplifying circuit #1 and current error amplifying circuit #2 is inputed to after two group storage battery discharging current samplings, the output signal MEA of voltage regulator and the output signal sum of current error amplifying circuit #1 output signal BDB1 through the computing of BDB1 two-out-of-three circuit, BDB1 inputs to the current regulator of 4 tunnel electric discharge regulating circuits corresponding to a wherein group storage battery, for described 4 tunnel electric discharge regulating circuit output current sizes provide reference signal, the output signal MEA of voltage regulator and the output signal sum of current error amplifying circuit #2 output signal BDB2 through the computing of BDB2 two-out-of-three circuit, signal BDB2 inputs to the current regulator of the corresponding 4 tunnel electric discharge regulating circuits of another group storage battery, for the output current size of described 4 tunnel electric discharge regulating circuits provides reference signal, the adjustment of the Correctional tube duty ratio size of 8 tunnel electric discharge regulating circuits is realized by the size adjusting signal BDB1 and signal BDB2, thus realize the adjustment of 8 tunnel electric discharge regulating circuit output current sizes, finally realize the adjustment of two group storage battery discharging current sizes, realize automatic equalization electric discharge.
Satellite power system two group storage battery balanced discharge control method adds the direct control of the discharging current of two group storage batteries on original traditional Balance route basis, therefore when having occurred that two group storage battery voltages electric discharge regulating circuit way that the is inconsistent or connection of two group storage batteries is inconsistent, two group storage batteries still can realize balanced discharge, the electric discharge regulating circuit output current that this result certainly will cause a group storage battery corresponding is greater than electric discharge regulating circuit output current corresponding to another group storage battery, as long as this output current is less than the output current cut-off current of single channel electric discharge regulating circuit, two group storage batteries all can realize automatic equalization electric discharge.
Compared with prior art, to be of the present inventionly a little:
1. the present invention can realize still can realizing two group storage battery balanced discharge when the output voltage of two group storage batteries is not of uniform size to be caused, when therefore can avoid existing satellite unit layout, two group storage batteries are to the inconsistent impact on two group storage battery balanced discharge of Energy control unit electric discharge regulating circuit input port cable length;
2. when in satellite power system two group storage battery, wherein a joint monomer lost efficacy in a group storage battery, cause two group storage battery output voltages inconsistent, the highest difference 4.25V, and satellite load need not be alleviated still can realize two group storage battery balanced discharge, greatly improve the service efficiency in the lifetime of satellite;
3. exist in the satellite power system electric discharge regulating circuit that wherein a group storage battery is corresponding one tunnel electric discharge regulating circuit lost efficacy exit power supply after, a road corresponding to another group storage battery need not be closed to discharge normally regulating circuit, still can realize two group storage battery balanced discharge, result is that the output current of wherein three tunnel electric discharge regulating circuits increases, but when being only less than this three tunnel electric discharge regulating circuit output current limiting ability, two group storage batteries still can realize balanced discharge, and the power output loss of Energy control unit electric discharge regulating circuit reduces greatly.
Accompanying drawing explanation
Fig. 1 is satellite power system two group storage battery balanced discharge control system principle diagram.
Fig. 2 is electric discharge regulating circuit theory diagram.
Fig. 3 is voltage error amplifying circuit theory diagram.
Fig. 4 is current error amplifying circuit #1 schematic diagram.
Fig. 5 is current error amplifying circuit #2 schematic diagram.
Fig. 6 is MEA two-out-of-three circuit schematic diagram.
Fig. 7 is BDB1 two-out-of-three circuit schematic diagram.
Fig. 8 is BDB2 two-out-of-three circuit schematic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, set forth the present invention further.These embodiments are interpreted as only being not used in for illustration of the present invention limiting the scope of the invention.After the content of having read the present invention's record, those skilled in the art can make various changes or modifications the present invention, and these equivalence changes and modification fall into the scope of the claims in the present invention equally.
Storage battery (1,2) in Fig. 1, electric discharge regulating circuit (5,6,7,8,9,10,11,12), current error amplifying circuit #1(15), current error amplifying circuit #2(20), voltage regulator (28), battery discharging current sampling circuit (13,14), output filter capacitor battle array (30), load R
0(36) composition satellite power system two group storage battery balanced discharge control system (31) such as, satellite power system two group storage battery balanced discharge control system (31) adopts current inner loop, outer voltage Double-loop Control Technology, and two group storage batteries (1,2) Voltage Cortrol is stable busbar voltage V by 8 tunnel electric discharge regulating circuit (5,6,7,8,9,10,11,12) parallel operations
bUS+export as power satellite, 8 tunnels electric discharge regulating circuit (5,6,7,8,9,10,11,12) share a voltage regulator (28), busbar voltage sampled signal V
bUS1+, V
bUS2+, V
bUS3+with reference signal V
ref1, V
ref2, V
ref3through voltage regulator (28) computing output signal MEA, signal MEA reflects load R
0size, signal MEA is input to current error amplifying circuit #1(15) and current error amplifying circuit #2(20) in, battery discharging current sampling circuit (13) gathers storage battery (1) discharging current three times, is I
bat#1_1, I
bat#1_2,i
bat#1_3, battery discharging current sampling circuit (14) gathers storage battery (2) discharging current three times, is I
bat#2_1, I
bat#2_2,i
bat#2_3, I
bat#1_1, I
bat#1_2, I
bat#1_3and I
bat#2_1, I
bat#2_2, I
bat#2_3input to current error amplifying circuit 1(16) output signal EI1#1, EI1#2, EI1#3 after computing, signal EI1#1, EI1#2, EI1#3 input to BDB1 two-out-of-three circuit (19) computing after being added with signal MEA respectively, output signal BDB1, I
bat#1_1, I
bat#1_2, I
bat#1_3and I
bat#2_1, I
bat#2_2, I
bat#2_3input to current error amplifying circuit 2(21) computing, output signal EI2#1, EI2#2, EI2#3, EI2#1, EI2#2, EI2#3 outputs signal BDB2 after inputing to BDB2 two-out-of-three circuit (24) computing, electric discharge regulating circuit (5, 6, 7, 8, 9, 10, 11, 12) independently current regulator (32) is had, signal BDB1 inputs to electric discharge regulating circuit (5, 6, 7, 8) current regulator (32), signal BDB2 inputs to electric discharge regulating circuit (9, 10, 11, 12) current regulator (32), electric discharge regulating circuit (5, 6, 7, 8) output current size controls by signal BDB1, electric discharge regulating circuit (9, 10, 11, 12) output current size controls by signal BDB2, the size of signal BDB1 and BDB2 reflects load R
0and two error condition of group storage battery (1,2) discharging current, automatically BDB1 and BDB2 signal magnitude is adjusted by system degeneration factor, realize the adjustment of the output current size of electric discharge regulating circuit (5,6,7,8,9,10,11,12), finally realize the automatic equalization electric discharge of storage battery (1) and storage battery (2).
8 tunnel electric discharge regulating circuits (5 in Fig. 1, 6, 7, 8, 9, 10, 11, 12) parallel operation, circuit form and parameter completely the same, by weinberg topology (37), output current sample circuit (35), current regulator (32), pulse-width modulation circuit (33), drive circuit (34) forms, Fig. 2 gives a wherein road electric discharge regulating circuit theory diagram, wherein signal BDB1 inputs to electric discharge regulating circuit (5, 6, 7, 8) current regulator (32), signal BDB2 inputs to electric discharge regulating circuit (9, 10, 11, 12) current regulator (32).In satellite power system two group storage battery balanced discharge control system (31), 8 tunnels electric discharge regulating circuit (5,6,7,8,9,10,11,12) share a voltage regulator (28), consider reliability, voltage regulator (28) forms three by three road voltage error amplifying circuits (25,26,27) and gets two hot redundancy relationship, and Fig. 3 gives voltage error amplifying circuit (25) theory diagram.
Fig. 4 is current error amplifying circuit #1 schematic diagram.The discharging current sampled signal I of storage battery (1)
bat#1_1,i
bat#1_2,i
bat#1_3be connected with the negative terminal of amplifier N3, N5, N7 by resistance R11, R14, R17, the discharging current sampled signal I of storage battery (2)
bat#2_1,i
bat#2_2,i
bat#2_3be connected with the anode of amplifier N3, N5, N7 by resistance R10, R13, R16.Current error amplifying circuit 1(16) output signal be EI1#1, EI1#2, EI1#3, form hot redundancy relationship between three.
Fig. 5 is current error amplifying circuit #2 schematic diagram.The discharging current sampled signal I of storage battery (1)
bat#1_1,i
bat#1_2,i
bat#1_3be connected with the anode of amplifier N9, N11, N14 by resistance R19, R22, R25, the discharging current sampled signal I of storage battery (2)
bat#2_1,i
bat#2_2,i
bat#2_3be connected with the negative terminal of amplifier N9, N11, N14 by resistance R20, R23, R26.Current error amplifying circuit 2(21) output signal be EI2#1, EI2#2, EI2#3, form hot redundancy relationship between three.
Fig. 6 is MEA two-out-of-three circuit schematic diagram.MEA two-out-of-three circuit (29) input signal is output signal EU1, EU2, EU3 of voltage error amplifying circuit (25,26,27), forms hot redundancy relationship between three, and power supply derives from busbar voltage V
bUS+.
Fig. 7 is BDB1 two-out-of-three circuit schematic diagram.BDB1 two-out-of-three circuit (19) input signal is current error amplifying circuit #1(15) output signal be BDB1#1, BDB1#2, BDB1#3, form hot redundancy relationship between three, power supply derive from busbar voltage V
bUS+, BDB1 two-out-of-three circuit (19) output signal BDB1 inputs to current regulator (32) input of the electric discharge regulating circuit (5,6,7,8) that storage battery (1) connects.
In Fig. 8, BDB2 two-out-of-three circuit (24) input signal is current error amplifying circuit #2(20) output signal be BDB2#1, BDB2#2, BDB2#3, form hot redundancy relationship between three, power supply derive from busbar voltage V
bUS+, BDB2 two-out-of-three circuit (24) output signal BDB2 inputs to current regulator (32) input of the electric discharge regulating circuit (9,10,11,12) that storage battery (2) connects.
Assumed initial state storage battery (1) discharging current is greater than storage battery (2) discharging current, storage battery (1) discharging current sample circuit output signal I
bat#1_1, I
bat#1_2, I
bat#1_3be greater than storage battery (2) discharging current sample circuit output signal I
bat#2_1, I
bat#2_2, I
bat#2_3current error amplifying circuit 1(16) output signal EI1#1, EI1#2, EI1#3 reduction, current error circuit 2(21) output signal EI2#1, EI2#2, EI2#3 increase, BDB1 two-out-of-three circuit (19) output signal BDB1 reduces, current regulator (32) the output voltage V of electric discharge regulating circuit (5,6,7,8)
sreduce, after pulse-width modulation circuit (33) and drive circuit (34), the duty ratio of Correctional tube Q1, Q2 of electric discharge regulating circuit (5,6,7,8) reduces, the output current of electric discharge regulating circuit (5,6,7,8) reduces, this group storage battery (1) discharging current is finally caused to reduce, BDB2 two-out-of-three circuit (24) output signal BDB2 increases, current regulator (32) the output voltage V of electric discharge regulating circuit (9,10,11,12)
sincrease, after pulse-width modulation circuit (33) and drive circuit (34), electric discharge regulating circuit (9, 10, 11, 12) Correctional tube Q1, the duty ratio of Q2 increases, electric discharge regulating circuit (9, 10, 11, 12) output current increases, storage battery (2) discharging current increases, two group storage batteries (1, 2) discharging current error reduces gradually, finally realize two group storage batteries (1, 2) dynamic equilibrium of discharging current, realize automatic equalization electric discharge, otherwise, if initial condition storage battery (2) discharging current is greater than storage battery (1) discharging current, current error amplifying circuit 2(21) output voltage EI2#1, EI2#2, EI2#3 reduces, current error circuit 1(16) output voltage EI1#1, EI1#2, EI1#3 increases, BDB1 two-out-of-three circuit (19) output signal BDB1 increases, electric discharge regulating circuit (5, 6, 7, 8) current regulator (32) output voltage V
sincrease, after pulse-width modulation circuit (33) and drive circuit (34), the duty ratio of Correctional tube Q1, Q2 of electric discharge regulating circuit (5,6,7,8) increases, the output current of electric discharge regulating circuit (5,6,7,8) increases, storage battery (1) discharging current increases, BDB2 two-out-of-three circuit (24) output signal BDB2 reduces, current regulator (32) the output voltage V of electric discharge regulating circuit (9,10,11,12)
sreduce, after the pulse-width modulation circuit (33) and drive circuit (34) of overdischarge regulating circuit (9,10,11,12), Correctional tube Q1, Q2 duty ratio reduces, the output current of electric discharge regulating circuit (9,10,11,12) reduces, storage battery (2) discharging current reduces, the discharging current error of two group storage batteries (1,2) reduces gradually, finally realize the dynamic equilibrium of two group storage batteries (1,2) discharging current, realize automatic equalization electric discharge, thus realize the closed-loop control to this control system.Above-mentioned BDB1 two-out-of-three circuit and BDB2 two-out-of-three circuit are same model circuit
In sum, satellite power system two group storage battery balanced discharge control method of the present invention is no longer confined to the restriction of every road electric discharge regulating circuit input power corresponding to storage battery, but increases on the basis of input power controlling every road electric discharge regulating circuit and control the error signal of two group storage battery discharging currents.Therefore the method is when above three kinds of situations occur, equal can ensure two group storage batteries can realize automatic equalization electric discharge, thus greatly can improve the fan-out capability of the performance of satellite power system storage battery, operation on orbit life-span and power-supply system power, also do not bring any impact to satellite simultaneously.
Above-mentioned example is set forth with concrete flyback converter feed push-pull topology weinberg topology; for those skilled in the art; according to technical scheme of the present invention and different circuit topologies, can make different conversion or change, it all belongs to protection scope of the present invention.
Claims (2)
1. a satellite power system two group storage battery balanced discharge control method, it is characterized in that, adopt outer voltage, current inner loop double-loop control, two group storage battery Voltage Cortrol are that stable busbar voltage exports as power satellite by 8 tunnel electric discharge regulating circuit parallel operations, 8 tunnel electric discharge regulating circuits share an identical voltage regulator, every road electric discharge regulating circuit has independently electric current loop, bus sampled signal and reference signal input to voltage regulator computing, current error amplifying circuit #1 and current error amplifying circuit #2 is inputed to after two group storage battery discharging current samplings, the output signal MEA of voltage regulator and the output signal sum of current error amplifying circuit #1 output signal BDB1 through the computing of BDB1 two-out-of-three circuit, BDB1 inputs to the current regulator of 4 tunnel electric discharge regulating circuits corresponding to a wherein group storage battery, for described 4 tunnel electric discharge regulating circuit output current sizes provide reference signal, the output signal MEA of voltage regulator and the output signal sum of current error amplifying circuit #2 output signal BDB2 through the computing of BDB2 two-out-of-three circuit, signal BDB2 inputs to the current regulator of the corresponding 4 tunnel electric discharge regulating circuits of another group storage battery, for the output current size of described 4 tunnel electric discharge regulating circuits provides reference signal, the adjustment of the Correctional tube duty ratio size of 8 tunnel electric discharge regulating circuits is realized by the size adjusting signal BDB1 and signal BDB2, thus realize the adjustment of 8 tunnel electric discharge regulating circuit output current sizes, finally realize the adjustment of two group storage battery discharging current sizes, realize automatic equalization electric discharge.
2. satellite power system two group storage battery balanced discharge control method as claimed in claim 1, it is characterized in that, described BDB1 two-out-of-three circuit and BDB2 two-out-of-three circuit are same model circuit.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112421714A (en) * | 2020-11-06 | 2021-02-26 | 上海空间电源研究所 | Current-limiting control method of discharge regulator for satellite |
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| CN102655346A (en) * | 2012-04-25 | 2012-09-05 | 浙江大学 | Intelligent battery module and battery pack with automatic balance capability |
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