CN105811536A - Singlechip microcomputer control base large current balancing method of lithium manganate battery - Google Patents
Singlechip microcomputer control base large current balancing method of lithium manganate battery Download PDFInfo
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- CN105811536A CN105811536A CN201610337672.0A CN201610337672A CN105811536A CN 105811536 A CN105811536 A CN 105811536A CN 201610337672 A CN201610337672 A CN 201610337672A CN 105811536 A CN105811536 A CN 105811536A
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- lithium manganate
- manganate battery
- battery
- voltage
- catalyst
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- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 title claims abstract description 147
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 239000003054 catalyst Substances 0.000 claims description 37
- 239000000178 monomer Substances 0.000 claims description 11
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052744 lithium Inorganic materials 0.000 claims description 5
- 239000011449 brick Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 239000011159 matrix material Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005183 dynamical system Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- LBSANEJBGMCTBH-UHFFFAOYSA-N manganate Chemical compound [O-][Mn]([O-])(=O)=O LBSANEJBGMCTBH-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
-
- H02J7/0026—
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a singlechip microcomputer control based large current balancing method of a lithium manganate battery. A lithium manganate battery system is arranged and comprises at least two lithium manganate batteries, first contactors, second contactors, a large current discharging resistor, a lithium manganate battery voltage detection module, a singlechip microcomputer controller and a protection device, wherein the at least two lithium manganate batteries are connected in series, the quantity of the first contactors and the second contactors are the same as the quantity of the lithium manganate batteries, the singlechip microcomputer controller acquires the voltage of each lithium manganate battery through the lithium manganate battery voltage detection module, and when the balance degree among the lithium manganate batteries is greater than a set threshold, the lithium manganate battery with the maximum voltage is discharged by the large current discharging resistor according to a set time. According to the method, a singlechip microcomputer is taken as a main balancing controller, and the system cost is reduced; with the adoption of a contactor matrix, large current discharging of the lithium manganate battery is achieved, the balancing reliability can be improved, and the large current discharging is achieved; and the method is simple to operate, is safe and reliability and is high in balancing effect.
Description
Technical field
The invention belongs to the balancing technique field of lithium battery group, particularly to one based on the big current balance method of monolithic processor controlled lithium manganate battery.
Background technology
The development of fuel-engined vehicle causes the huge consumption of petroleum resources, the continuous intensification of global energy crisis, exacerbates the harm of greenhouse effect and atmospheric pollution simultaneously.Most countries, government and Automobile Enterprises are all it is well recognized that energy-saving and emission-reduction are the developing direction of future automobile industry in the world, and Development of EV will be the optimum method solving this difficult point.It is low that electric automobile has noise, emission-free discharge, environmental friendliness, and the thermal efficiency is high, discharges low, and recoverable improves the advantages such as energy resource structure.Each automobile production enterprise just actively researches and develops electric automobile, and Chinese Government is also actively promoting electric automobile.Electric automobile can be roughly divided into pure electric automobile, hybrid-electric car and FC-EV according to power source, and these electric automobiles generally can configure battery as energy-storage travelling wave tube, particularly in pure electric automobile extensive use multi-series and parallel battery as power source.
Lithium manganate battery is with LiMn2O4As the positive level of battery, aluminium foil being connected with other positive poles, centre is the barrier film of polymer, and it separates positive pole and negative pole, but lithium ion can by and electronics can not pass through, the battery cathode that the right is made up of carbon, Copper Foil be connected with the negative pole of battery.Battery is the electrolyte of battery between the upper and lower ends, and battery is closed encapsulation by metal shell.Lithium manganate battery is superior due to its discharge performance, it is possible to extensively apply in dynamical system.
Due to the individuality that each monomer of lithium manganate battery group is all different, in production technology, the factor such as production time causes that battery performance index exists difference.Although along with the continuous progress of technology, before dispatching from the factory, the difference between lithium manganate battery inside constantly reduces, but discordance faint in use procedure constantly can be amplified along with use condition.Such discordance is by increasing with design load deviation for the capacity causing whole group of lithium manganate battery.In charging process, first the monomer that capacity is little will be filled, and cause that the battery of other capacity can not obtain enough capacity；In discharge process, first the monomer that capacity is little is discharged into blanking voltage, and stopping is discharged by whole Battery pack.The existence of such problem of inconsistency, active volume and service life of causing lithium manganate battery group etc., aspect was far away from cell, and increased difficulty battery being managed and controlling.Practice have shown that, significantly reduce when the consistency problem of set of cells develops into Individual cells generation capacity, when internal resistance such as significantly improves at the situation, the performance of whole Battery pack can at short time high progression so that whole set of cells is scrapped.
In order to solve lithium manganate battery group problem of inconsistency, there has been proposed the balancing technique of lithium manganate battery.The voltage to the effect that detecting lithium manganate battery group of balanced management, the parameter such as electric current, these parameters are identified, analyze battery with two side terminals, by controlling device, the monomer of energy height is discharged, make the state of each monomer reach unanimity.The consistency problem of set of cells can be improved by effective Balance route strategy and equalizing circuit, it is possible to extend the life-span of set of cells, reduce the maintenance cost of set of cells, make the electric automobile that safe and efficient intelligence uses put it over.
Equalization methods general at present is that each lithium manganate battery is configured a discharge resistance, by checking the voltage of each monomer, the monomer that monomer is higher is discharged by the discharge resistance of oneself correspondence.When lithium manganate cell volume is relatively larger, this discharge resistance discharge current would become hard to meet the requirement of fast uniform.If discharge resistance power corresponding for each lithium manganate battery is become big, its volume and heat radiation are by the face of new challenge, the method that the method for existing employing resistance equilibrium seldom has big current balance.
Summary of the invention
It is an object of the invention to provide a kind of based on the big current balance method of monolithic processor controlled lithium manganate battery.
Concretely comprise the following steps:
(1) a set of lithium manganate battery system is set; including lithium manganate battery group, heavy-current discharge resistance, lithium manganate battery voltage detection module, singlechip controller and protection device; wherein lithium manganate battery group includes the lithium manganate battery of at least two series connection, wherein all corresponding first catalyst of each lithium manganate battery and second catalyst；The positive pole of lithium manganate battery is connected to heavy-current discharge resistance the first end by the first catalyst of its correspondence, and the negative pole of lithium manganate battery is connected to heavy-current discharge resistance the second end by the second catalyst of its correspondence；Lithium manganate cell positive electrode can be connected with lithium manganate battery voltage detection module with negative pole with being energized；Singlechip controller includes CAN terminal and control terminal, CAN terminal is connected with lithium manganate battery voltage detection module, the control terminal of control terminal and the first catalyst and the second catalyst connects, when controlling the first catalyst corresponding to lithium manganate battery and the conducting of the second catalyst when singlechip controller, lithium manganate battery and heavy-current discharge resistor coupled in parallel, synchronization only one of which lithium manganate battery and heavy-current discharge resistor coupled in parallel；Protection device includes D.C. contactor and resettable fuse, D.C. contactor and resettable fuse and is cascaded and is followed by the negative pole of lithium manganate battery group.
Described lithium manganate battery is basic lithium manganate battery unit and monomer lithium manganate battery or the lithium manganate battery brick composed in parallel by multiple basic lithium manganate battery unit.
(2) the lithium manganate battery system that step (1) is arranged is run according to following steps:
A. singlechip controller communicates with lithium manganate battery voltage detection module, it is thus achieved that the voltage of each lithium manganate battery.
B. singlechip controller is according to the N number of lithium manganate battery voltage obtained, and finds out the lithium manganate battery that magnitude of voltage is maximum, and wherein N is be more than or equal to 2.
C. singlechip controller obtains the meansigma methods of all lithium manganate battery voltage.
D. jump into step e when the maximum lithium manganate battery voltage of magnitude of voltage and all lithium manganate battery average voltage deviations set threshold values more than one, otherwise return to step a.
E. singlechip controller is by controlling the first catalyst corresponding to the maximum lithium manganate battery of voltage and lithium manganate battery that the second catalyst makes magnitude of voltage maximum and heavy-current discharge resistor coupled in parallel, and the lithium manganate battery that magnitude of voltage is maximum discharges.
F. waiting the time T of setting, singlechip controller disconnects all contactless contactors by control terminal, and program returns step a.
(3) complete step (2) namely to realize based on the big current balance of monolithic processor controlled lithium manganate battery.
The inventive method uses a set of lithium manganate battery system, this lithium manganate battery system includes the charging and discharging balance device of lithium manganate battery, lithium manganate battery system is made effectively to be managed in charge and discharge process and balanced, to improve efficiency and the service life of lithium manganate battery system, reduce the maintenance cost of LiMn2O4 electricity system；The present invention adopts single-chip microcomputer as primary equalization controller, reduces the cost of system, and adopts catalyst matrix-style, realize the heavy-current discharge to lithium manganate battery, to improve the reliability of equilibrium, it is achieved heavy-current discharge, the inventive method is simple to operate, safe and reliable, and portfolio effect is good.
Accompanying drawing explanation
Fig. 1 is the structural representation of the lithium manganate battery system that the embodiment of the present invention uses.
Fig. 2 is the balance control method flow chart in embodiment of the present invention charge and discharge process.
Detailed description of the invention
Embodiment:
Below in conjunction with accompanying drawing, the present invention will be further described.
It is described below for disclosing the present invention so that those skilled in the art are capable of the present invention.Preferred embodiment in being described below is only used as citing, it may occur to persons skilled in the art that other apparent modification.The ultimate principle of the present invention defined in the following description can apply to other embodiments, deformation program, improvement project, equivalent and the other technologies scheme without departing from the spirit and scope of the present invention.
As it is shown in figure 1, one is based on the big current balance method of monolithic processor controlled lithium manganate battery, concretely comprise the following steps:
(1) a set of lithium manganate battery system is set; carry the high-power resistance of radiator including lithium manganate battery group, heavy-current discharge resistance R(), lithium manganate battery voltage detection module, singlechip controller and protection device; wherein lithium manganate battery group includes the lithium manganate battery of at least two series connection, wherein all corresponding first catalyst of each lithium manganate battery and second catalyst；The positive pole of lithium manganate battery is connected to heavy-current discharge resistance the first end by the first catalyst of its correspondence, and the negative pole of lithium manganate battery is connected to heavy-current discharge resistance the second end by the second catalyst of its correspondence；Lithium manganate cell positive electrode can be connected with lithium manganate battery voltage detection module with negative pole with being energized；Singlechip controller includes CAN terminal and control terminal, CAN terminal is connected with lithium manganate battery voltage detection module, the control terminal of control terminal and the first catalyst and the second catalyst connects, when controlling the first catalyst corresponding to lithium manganate battery and the conducting of the second catalyst when singlechip controller, lithium manganate battery and heavy-current discharge resistor coupled in parallel, synchronization only one of which lithium manganate battery and heavy-current discharge resistor coupled in parallel；Protection device includes D.C. contactor and resettable fuse, D.C. contactor and resettable fuse and is cascaded and is followed by the negative pole of lithium manganate battery group.
Described lithium manganate battery is basic lithium manganate battery unit and monomer lithium manganate battery.
The balanced negative pole of object lithium manganate battery 1 connects with the positive pole of balanced object lithium manganate battery 2, the balanced negative pole of object lithium manganate battery 2 connects with the positive pole of balanced object lithium manganate battery 3, it is sequentially connected in series each balanced object lithium manganate battery, until the balanced negative pole of object lithium manganate battery N-1 connects with the positive pole of balanced object lithium manganate battery N, all lithium manganate batteries are sequentially connected in series lithium manganate battery group, in lithium manganate battery group, the positive pole of the just extremely lithium manganate battery group of balanced object lithium manganate battery 1, the negative pole that negative pole is lithium manganate battery group of balanced object lithium manganate battery N.
The positive pole of each balanced object lithium manganate battery is connected with first end of heavy-current discharge resistance R by the first corresponding catalyst, the negative pole of each balanced object lithium manganate battery is connected with second end of heavy-current discharge resistance R by the second corresponding catalyst, is connected with the control terminal of singlechip controller after the control terminal K parallel connection of the first catalyst and the second catalyst.
The D1 terminal of each first catalyst connects with the positive pole of balanced object lithium manganate battery, and D2 terminal is connected with first end of heavy-current discharge resistance R, and control terminal K is connected with the control terminal of singlechip controller.
The D1 terminal of each second catalyst connects with the negative pole of balanced object lithium manganate battery, and D2 terminal is connected with second end of heavy-current discharge resistance R, and control terminal K is connected with the control terminal of singlechip controller.
Described lithium manganate battery voltage detection module can be connected with positive pole and the negative pole of lithium manganate battery with being energized, for detecting the voltage of each lithium manganate battery；It is connected with singlechip controller by CAN, sends the voltage signal detected to singlechip controller.
(2) the lithium manganate battery system that step (1) is arranged is run according to following steps:
A. singlechip controller communicates with lithium manganate battery voltage detection module, it is thus achieved that the voltage of each lithium manganate battery.
B. singlechip controller is according to the N number of lithium manganate battery voltage obtained, and finds out the lithium manganate battery that magnitude of voltage is maximum, and wherein N is be more than or equal to 2.
C. singlechip controller obtains the meansigma methods of all lithium manganate battery voltage.
D. jump into step e when the maximum lithium manganate battery voltage of magnitude of voltage and all lithium manganate battery average voltage deviations set threshold values more than one, otherwise return to step a.
E. singlechip controller is in parallel with heavy-current discharge resistance R by the lithium manganate battery controlling the first catalyst corresponding to the maximum lithium manganate battery of voltage and the second catalyst makes magnitude of voltage maximum, and the lithium manganate battery that magnitude of voltage is maximum discharges.
F. waiting the time T of setting, singlechip controller disconnects all contactless contactors by control terminal, and program returns step a.
(3) complete step (2) namely to realize based on the big current balance of monolithic processor controlled lithium manganate battery.
Claims (1)
1. one kind based on the big current balance method of monolithic processor controlled lithium manganate battery, it is characterised in that concretely comprise the following steps:
(1) a set of lithium manganate battery system is set; including lithium manganate battery group, heavy-current discharge resistance, lithium manganate battery voltage detection module, singlechip controller and protection device; wherein lithium manganate battery group includes the lithium manganate battery of at least two series connection, wherein all corresponding first catalyst of each lithium manganate battery and second catalyst；The positive pole of lithium manganate battery is connected to heavy-current discharge resistance the first end by the first catalyst of its correspondence, and the negative pole of lithium manganate battery is connected to heavy-current discharge resistance the second end by the second catalyst of its correspondence；Lithium manganate cell positive electrode can be connected with lithium manganate battery voltage detection module with negative pole with being energized；Singlechip controller includes CAN terminal and control terminal, CAN terminal is connected with lithium manganate battery voltage detection module, the control terminal of control terminal and the first catalyst and the second catalyst connects, when controlling the first catalyst corresponding to lithium manganate battery and the conducting of the second catalyst when singlechip controller, lithium manganate battery and heavy-current discharge resistor coupled in parallel, synchronization only one of which lithium manganate battery and heavy-current discharge resistor coupled in parallel；Protection device includes D.C. contactor and resettable fuse, D.C. contactor and resettable fuse and is cascaded and is followed by the negative pole of lithium manganate battery group；
Described lithium manganate battery is basic lithium manganate battery unit and monomer lithium manganate battery or the lithium manganate battery brick composed in parallel by multiple basic lithium manganate battery unit；
(2) the lithium manganate battery system that step (1) is arranged is run according to following steps:
A. singlechip controller communicates with lithium manganate battery voltage detection module, it is thus achieved that the voltage of each lithium manganate battery；
B. singlechip controller is according to the N number of lithium manganate battery voltage obtained, and finds out the lithium manganate battery that magnitude of voltage is maximum, and wherein N is be more than or equal to 2；
C. singlechip controller obtains the meansigma methods of all lithium manganate battery voltage；
D. jump into step e when the maximum lithium manganate battery voltage of magnitude of voltage and all lithium manganate battery average voltage deviations set threshold values more than one, otherwise return to step a；
E. singlechip controller is by controlling the first catalyst corresponding to the maximum lithium manganate battery of voltage and lithium manganate battery that the second catalyst makes magnitude of voltage maximum and heavy-current discharge resistor coupled in parallel, and the lithium manganate battery that magnitude of voltage is maximum discharges；
F. waiting the time T of setting, singlechip controller disconnects all contactless contactors by control terminal, and program returns step a；
(3) complete step (2) namely to realize based on the big current balance of monolithic processor controlled lithium manganate battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610337672.0A CN105811536A (en) | 2016-05-22 | 2016-05-22 | Singlechip microcomputer control base large current balancing method of lithium manganate battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610337672.0A CN105811536A (en) | 2016-05-22 | 2016-05-22 | Singlechip microcomputer control base large current balancing method of lithium manganate battery |
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| CN105811536A true CN105811536A (en) | 2016-07-27 |
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| CN201610337672.0A Pending CN105811536A (en) | 2016-05-22 | 2016-05-22 | Singlechip microcomputer control base large current balancing method of lithium manganate battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106450523A (en) * | 2016-11-11 | 2017-02-22 | 桂林理工大学 | ARM control based high current equalization method for lithium manganese oxide battery |
| CN106505667A (en) * | 2016-11-11 | 2017-03-15 | 桂林理工大学 | A kind of lithium manganate battery high current equalization methods controlled based on FPGA |
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| CN106505667A (en) * | 2016-11-11 | 2017-03-15 | 桂林理工大学 | A kind of lithium manganate battery high current equalization methods controlled based on FPGA |
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