CN105811533A - Large current balancing control system of lithium ferrous battery - Google Patents
Large current balancing control system of lithium ferrous battery Download PDFInfo
- Publication number
- CN105811533A CN105811533A CN201610337665.0A CN201610337665A CN105811533A CN 105811533 A CN105811533 A CN 105811533A CN 201610337665 A CN201610337665 A CN 201610337665A CN 105811533 A CN105811533 A CN 105811533A
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- China
- Prior art keywords
- lithium iron
- iron battery
- battery
- catalyst
- lithium
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title abstract description 14
- 229910052744 lithium Inorganic materials 0.000 title abstract description 14
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 title abstract 11
- 238000001514 detection method Methods 0.000 claims abstract description 13
- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 claims description 110
- 239000003054 catalyst Substances 0.000 claims description 31
- 239000000178 monomer Substances 0.000 claims description 11
- 239000011449 brick Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 2
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 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
- 229910052493 LiFePO4 Inorganic materials 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
- 229910052742 iron Inorganic materials 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 large current balancing control system of a lithium ferrous battery. The large current balancing control system of the lithium ferrous battery comprises at least two lithium ion batteries, first contactors, second contactors, a large current discharging resistor, a lithium ferrous battery voltage detection module, a singlechip microcomputer controller and a protection device, wherein the at least two lithium ferrous batteries are connected in series, the quantity of the first contactors and the second contactors are the same as the quantity of the lithium ferrous batteries, the singlechip microcomputer controller acquires the voltage of each lithium ferrous battery through the lithium ferrous battery voltage detection module, and when the balance degree among the lithium ferrous batteries is greater than a set threshold, the lithium ferrous battery with the maximum voltage is discharged by the large current discharging resistor according to a set time. In the large current balancing control system, 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 ferrous battery is achieved, the balancing reliability can be improved, and the large current discharging is achieved; and the system 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, control system particularly to a kind of big current balance of lithium iron 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.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 iron battery is with LiFePO4As 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 iron 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 iron 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 iron 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 iron 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, causes the aspect units such as the active volume organizing lithium iron battery and service life not as good as cell, and increases 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 iron battery group problem of inconsistency, there has been proposed the balancing technique of lithium iron battery.The voltage to the effect that detecting lithium iron 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 iron 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 iron battery capacity 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 iron 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 big current balance of lithium iron battery and control system.
The present invention is achieved in that a kind of big current balance of lithium iron battery controls system; including lithium iron battery group, heavy-current discharge resistance, lithium iron battery voltage detection module, singlechip controller and protection device; wherein lithium iron battery group includes the lithium iron battery of at least two series connection, and each lithium iron battery is one the first catalyst of correspondence and second catalyst all；The positive pole of lithium iron battery is connected to the first end of heavy-current discharge resistance by the first catalyst of its correspondence, and the negative pole of lithium iron battery is connected to the second end of heavy-current discharge resistance by the second catalyst of its correspondence；The positive pole of lithium iron battery can be connected with lithium iron battery voltage detection module with negative pole with being energized；Singlechip controller includes CAN terminal and control terminal, CAN terminal is connected with lithium iron battery voltage detection module, the control terminal of control terminal and the first catalyst and the second catalyst connects, when singlechip controller controls the first catalyst corresponding to lithium iron battery and the conducting of the second catalyst, lithium iron battery and heavy-current discharge resistor coupled in parallel, synchronization only one of which lithium iron 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 iron battery group.
Described lithium iron battery is basic lithium iron battery unit and monomer lithium iron battery or the lithium iron battery brick composed in parallel by multiple basic lithium iron battery unit.
The big current balance of lithium iron battery of the present invention controls system and includes the charging and discharging balance device of lithium iron battery, lithium iron battery is made effectively to be managed in charge and discharge process and balanced, can improve efficiency and the service life of lithium iron battery system, reduce the maintenance cost of ferrum lithium electricity system；The present invention adopts single-chip microcomputer as primary equalization controller, reduces the cost of system；The present invention adopts catalyst matrix-style, it is achieved the heavy-current discharge to lithium iron battery, it is possible to increase balanced reliability, and realizes heavy-current discharge；Native system is simple to operate, safe and reliable, and portfolio effect is good.
Accompanying drawing explanation
Fig. 1 is the structural representation that in the embodiment of the present invention, the big current balance of lithium iron battery controls system.
Fig. 2 is that in the embodiment of the present invention, the big current balance of lithium iron battery controls the balance control method flow chart in system charge and discharge process.
Detailed description of the invention
Embodiment:
Below in conjunction with accompanying drawing, the present invention is 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 shown in Figure 1; a kind of big current balance of lithium iron battery controls system; including lithium iron battery group, heavy-current discharge resistance R (carrying the high-power resistance of radiator), lithium iron battery voltage detection module, singlechip controller and protection device; wherein lithium iron battery group includes the lithium iron battery of at least two series connection, and each lithium iron battery is one the first catalyst of correspondence and second catalyst all；The positive pole of lithium iron battery is connected to the first end of heavy-current discharge resistance by the first catalyst of its correspondence, and the negative pole of lithium iron battery is connected to the second end of heavy-current discharge resistance by the second catalyst of its correspondence；The positive pole of lithium iron battery can be connected with lithium iron battery voltage detection module with negative pole with being energized；Singlechip controller includes CAN terminal and control terminal, CAN terminal is connected with lithium iron battery voltage detection module, the control terminal of control terminal and the first catalyst and the second catalyst connects, when singlechip controller controls the first catalyst corresponding to lithium iron battery and the conducting of the second catalyst, lithium iron battery and heavy-current discharge resistor coupled in parallel, synchronization only one of which lithium iron 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 iron battery group.
Described lithium iron battery is basic lithium iron battery unit and monomer lithium iron battery.
The balanced negative pole of object lithium iron battery 1 connects with the positive pole of balanced object lithium iron battery 2, the described balanced negative pole of object lithium iron battery 2 connects with the positive pole of balanced object lithium iron battery 3, it is sequentially connected in series each balanced object lithium iron battery, until the balanced negative pole of object lithium iron battery N-1 connects with the positive pole of balanced object lithium iron battery N, all lithium iron batteries are sequentially connected in series lithium iron battery group, in described lithium iron battery group, the positive pole of the just extremely described lithium iron battery group of described balanced object lithium iron battery 1, the negative pole that negative pole is described lithium iron battery group of described balanced object lithium iron battery N.
The positive pole of each described balanced object lithium iron battery is connected with first end of described heavy-current discharge resistance R by corresponding described first catalyst, the negative pole of each described balanced object lithium iron battery is connected with second end of described heavy-current discharge resistance R by corresponding described second catalyst, is connected with the control terminal of described singlechip controller after the control terminal K parallel connection of described first catalyst and described second catalyst.
Described lithium iron battery voltage detection module can be connected with positive pole and the negative pole of lithium iron battery with being energized, for detecting the voltage of each lithium iron battery；It is connected with described singlechip controller by CAN terminal, sends the voltage signal detected to singlechip controller.
The big current balance of lithium iron battery in the present embodiment controls system and runs according to following steps:
A. singlechip controller communicates with lithium iron battery voltage detection module, it is thus achieved that the voltage of each lithium iron battery.
B. singlechip controller is according to the N number of lithium iron battery voltage obtained, and finds out the lithium iron 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 iron battery voltage.
D. jump into step e when the maximum lithium iron battery voltage of magnitude of voltage and all lithium iron 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 iron battery of magnitude of voltage and the second catalyst, makes the maximum lithium iron battery of magnitude of voltage and heavy-current discharge resistor coupled in parallel, and the lithium iron 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 a.
Claims (1)
1. the big current balance of lithium iron battery controls system; it is characterized in that the big current balance of this lithium iron battery controls system and includes: lithium iron battery group, heavy-current discharge resistance, lithium iron battery voltage detection module, singlechip controller and protection device; wherein lithium iron battery group includes the lithium iron battery of at least two series connection, and each lithium iron battery is one the first catalyst of correspondence and second catalyst all；The positive pole of lithium iron battery is connected to the first end of heavy-current discharge resistance by the first catalyst of its correspondence, and the negative pole of lithium iron battery is connected to the second end of heavy-current discharge resistance by the second catalyst of its correspondence；The positive pole of lithium iron battery can be connected with lithium iron battery voltage detection module with negative pole with being energized；Singlechip controller includes CAN terminal and control terminal, CAN terminal is connected with lithium iron battery voltage detection module, the control terminal of control terminal and the first catalyst and the second catalyst connects, when singlechip controller controls the first catalyst corresponding to lithium iron battery and the conducting of the second catalyst, lithium iron battery and heavy-current discharge resistor coupled in parallel, synchronization only one of which lithium iron 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 iron battery group；
Described lithium iron battery is basic lithium iron battery unit and monomer lithium iron battery or the lithium iron battery brick composed in parallel by multiple basic lithium iron battery unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610337665.0A CN105811533A (en) | 2016-05-22 | 2016-05-22 | Large current balancing control system of lithium ferrous battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610337665.0A CN105811533A (en) | 2016-05-22 | 2016-05-22 | Large current balancing control system of lithium ferrous battery |
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| Publication Number | Publication Date |
|---|---|
| CN105811533A true CN105811533A (en) | 2016-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610337665.0A Pending CN105811533A (en) | 2016-05-22 | 2016-05-22 | Large current balancing control system of lithium ferrous battery |
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| CN (1) | CN105811533A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410912A (en) * | 2016-11-11 | 2017-02-15 | 桂林理工大学 | High-current equilibrium FPGA control system of lithium-ion batteries |
| CN106505671A (en) * | 2016-11-11 | 2017-03-15 | 桂林理工大学 | Lithium iron battery high current equilibrium ARM control systems |
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| US20120161715A1 (en) * | 2010-12-22 | 2012-06-28 | Jong-Doo Park | Cell balancing circuit, method of driving the same, and battery management system that includes the cell balancing circuit |
| CN102569926A (en) * | 2010-12-31 | 2012-07-11 | 欣旺达电子股份有限公司 | Automobile lithium battery charge balancing method and balancing system |
| CN103887853A (en) * | 2014-03-18 | 2014-06-25 | 浙江大学城市学院 | Balance control method of lithium-ion battery set |
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2016
- 2016-05-22 CN CN201610337665.0A patent/CN105811533A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1607708A (en) * | 2003-10-13 | 2005-04-20 | 上海燃料电池汽车动力系统有限公司 | Equalizing circuit for lithium ion power accumulator |
| US20120161715A1 (en) * | 2010-12-22 | 2012-06-28 | Jong-Doo Park | Cell balancing circuit, method of driving the same, and battery management system that includes the cell balancing circuit |
| CN102569926A (en) * | 2010-12-31 | 2012-07-11 | 欣旺达电子股份有限公司 | Automobile lithium battery charge balancing method and balancing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410912A (en) * | 2016-11-11 | 2017-02-15 | 桂林理工大学 | High-current equilibrium FPGA control system of lithium-ion batteries |
| CN106505671A (en) * | 2016-11-11 | 2017-03-15 | 桂林理工大学 | Lithium iron battery high current equilibrium ARM control systems |
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Application publication date: 20160727 |
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