CN106100064A - Active charge equalization system based on many DC and control method thereof - Google Patents
Active charge equalization system based on many DC and control method thereof Download PDFInfo
- Publication number
- CN106100064A CN106100064A CN201610647082.8A CN201610647082A CN106100064A CN 106100064 A CN106100064 A CN 106100064A CN 201610647082 A CN201610647082 A CN 201610647082A CN 106100064 A CN106100064 A CN 106100064A
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- charging
- cells
- pressing plate
- system based
- battery
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000003825 pressing Methods 0.000 claims description 32
- 239000000779 smoke Substances 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000007514 turning Methods 0.000 claims 1
- 238000004146 energy storage Methods 0.000 abstract 1
- 230000007246 mechanism Effects 0.000 abstract 1
- 239000000178 monomer Substances 0.000 description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000004804 winding 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
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
-
- 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
-
- H02J7/0091—
-
- 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
Present invention is disclosed a kind of active charge equalization system based on many DC, by two set charging mechanisms, complete charge balancing work.It is an advantage of the current invention that compared to dissipative equalization, there is not heat management problems；Compared to the non-dissipation equilibrium of inductively or capacitively energy storage, the method euqalizing current is big, and efficiency is high, and speed is fast；Equalizing compared to transformator, the method is without magnetic core and coil, and without magnetic leakage, volume is controlled.
Description
Technical field
The present invention relates to lithium cell charging field.
Background technology
Equilibrium is the key technology solving battery cell diversity.Electric vehicle can be divided into charging rank according to use state
Section and electric discharge and idle stage.For the work characteristics that two stages are different, formulate different balance policies respectively.
The charging stage purpose of equilibrium is just so that all of monomer can be full of, and avoids monomer electricity inconsistent as far as possible
Situation.At present document it has been reported that charge balancing generally use dissipative equalization or nondissipative equalization.
Dissipative equalization scheme produces amount of heat while heat sink resistance waste electricity, causes heat management problems, and
Euqalizing current is relative to charging current excessively Microsoft.
The equilibrium of non-dissipative type often utilizes inductance and electric capacity to realize energy from the high monomer of voltage to the low monomer of voltage
Shifting, the time required for equilibrium is the longest, does not meets the battery charging requirement to rapidity；And switching switch also can frequently
Consuming a lot of energy, in transfer process, some can be consumed electric energy due to the loss of device certainly.Coaxial coil
Transformator equalizing circuit, owing to the conductor length between winding to each single battery is different with shape, transformation ratio is variant, causes
Equalize each single battery is inconsistent.Coaxial coil itself, due to problems such as electromagnetic exposure, consumes certain energy；Simultaneously
The volume of transformator also limit its application in a lot of compact occasions.These problems make above-mentioned nondissipative equalization scheme difficult
With practical.
Summary of the invention
The technical problem to be solved is to realize a kind of charge efficiency height, stable, safe and reliable equalizaing charge
Device.
To achieve these goals, the technical solution used in the present invention is: active charge equalization system based on many DC,
System includes charger and set of cells to be charged, described set of cells by multiple battery cell pack upper cover plate and lower cover it
Between constitute, described battery unit is made up of multiple battery cells, described charger be provided with two respectively connect set of cells both positive and negative polarities
The charging wire clamp of terminals, described set of cells is provided with BMS, it is characterised in that:
Described charger output electric energy to multiple DC-DC, each described DC-DC all by wherein the one of multipath control switch
Individual switch ways connects charging electrode, the battery unit quantity phase of the switch ways quantity of described multipath control switch and set of cells
With, each described battery unit is equipped with independent input electrode, and described input electrode is each attached to the upper surface of upper cover plate；
Described charger is provided with the support seat of placing battery group, and described support seat is arranged over the pressing plate that charges, described charging
Pressing plate is fixed on lower air cylinder, and described charging electrode is fixed on the lower surface of charging pressing plate, and described charging pressing plate lower surface leads to
Cross Flexible Connector and be fixed with temperature sensor, described temperature sensor output temperature signal to controller, described controller with
BMS connects and receives the electric quantity signal of each battery cell that BMS exports, and described controller output make-and-break signal is to multi-channel control
Switch element on switch and charging wire clamp.
Described input electrode is the conductive metal sheet of depression, and described charging electrode is spherical or hemispherical dome structure and passes through bullet
Property connector be fixed on charging pressing plate lower surface.
Being fixed with cover sheet on described upper cover plate, the corner of described cover sheet is provided with fixing hole and is fixed by screw
On the upper cover plate of set of cells, described cover sheet edge is provided with the breach stretched out for both positive and negative polarity terminals.
Described supports at least provided with two leads protruded on seat, and described charging pressing plate is provided with and matches with lead
The pilot hole closed, described support seat is provided with the cavity matched with set of cells lower cover.
The lower surface of described charging pressing plate is provided with smoke detectors, and described smoke detectors output smoke signal is to controlling
Device, four corners of described support seat are equipped with the nozzle being tilted towards set of cells ejecting extinguishing material, and described nozzle passes through pipeline
Being connected with the pressure vessel of storage fire extinguishing material, described pipeline is provided with electromagnetic valve, and described controller outputs control signals to electricity
Magnet valve.
Described temperature sensor is provided with lower surface that is multiple and that be uniformly fixed on charging pressing plate, described fixed temperature sensor
Flexible Connector identical with the Flexible Connector length of fixing charging electrode.
The control method of active charge equalization system based on described many DC:
Charger starts, and charging wire clamp charges to set of cells, when BMS system detects all batteries of a certain battery unit
After monomer all reaches charge protection voltage, charging wire clamp stops charging；
Open each switch ways of multipath control switch successively, all battery units are individually charged, if currently filling
Close current switch path after all battery cells reach charge protection voltage in the battery unit of electricity, open next one switch logical
Road, until all switch ways complete once to open.
The output electric current of the described charging wire clamp output electric current more than DC-DC, described DC-DC carries out constant voltage equalizaing charge.
If controller receives temperature anomaly signal, then charge closing machine reporting to the police, if controller to receive smog abnormal
Signal, then opens solenoid valve reporting to the police.
If controller receives temperature anomaly signal, rise charging pressing plate, if controller receives the abnormal letter of smog simultaneously
Number, then keep charging pressing plate pressed status.
It is an advantage of the current invention that compared to dissipative equalization, there is not heat management problems；Compared to inductively or capacitively storing up
The non-dissipation equilibrium of energy, the method euqalizing current is big, and efficiency is high, and speed is fast；Equalizing compared to transformator, the method is without magnetic core
With coil, without magnetic leakage, volume is controlled.
Accompanying drawing explanation
The content expressed every width accompanying drawing in description of the invention below is briefly described:
Fig. 1 is active charge equalization system block diagrams based on many DC.
Detailed description of the invention
Active charge equalization system based on many DC include charging system and the set of cells of matched use.
Lithium battery is generally made up of battery unit multiple battery cells, more multiple battery units are connected with each other post package exist
Constituting set of cells between upper cover plate and lower cover, the connection in series-parallel relation between battery cell and between battery unit is according to battery
Group needs design.
Charger is device for converting electric energy, for charging to set of cells, the upper cover plate of set of cells is fixed with output electric energy
Both positive and negative polarity terminals, charger is provided with charging wire clamp, it is possible to use charging wire clamp clamping both positive and negative polarity terminals be set of cells
Charging, for the ease of coordinating charging with the miscellaneous part of charging device, and does not produce interference, and both positive and negative polarity terminals are preferably provided at
The edge of upper cover plate, for the ease of controlling charging wire clamp duty, the supply line of charging wire clamp is provided with switch element.
Another outfan transmission of electricity of charger can be a direct current transformation module to multiple DC-DC, DC-DC, is used for adjusting
Joint charging voltage, each DC-DC all connects charging electrode by one of them switch ways of multipath control switch, the most each
DC-DC is provided with a corresponding switch ways and charging electrode, the switch ways quantity of multipath control switch and battery
The battery unit quantity of group is identical, and so, each battery unit is equipped with independent input electrode, wiring of charging for convenience,
Input electrode, by independent cabling, is each attached to the upper surface of upper cover plate.
Charger is provided with the support seat of placing battery group, supports seat and is used for limiting and positioning lower cover, support seat be provided with
The cavity that set of cells lower cover matching form closes, can be limited in cavity reliably by set of cells.Support seat to be arranged over filling
Voltage plate, charging voltage plate level is arranged, and charging pressing plate is fixed on lower air cylinder, can control charging voltage plate by lower air cylinder
Under press or rise, for guaranteeing the reliable and stable of pressing plate upper and lower displacement of charging, support at least provided with two leads protruded on seat,
Charging pressing plate is provided with the pilot hole matched with lead.
Charging electrode is fixed on the lower surface of charging pressing plate, defeated with on set of cells upper cover plate of the fixed position of charging electrode
Entering electrode position corresponding, thus realize quickly connecting, input electrode is the conductive metal sheet of depression, charging electrode be spherical or
Hemispherical dome structure is also fixed on charging pressing plate lower surface by Flexible Connector, and Flexible Connector is the metal elastic of spring or folding
Sheet, can coordinate the conductive metal sheet of depression to be fully contacted with spherical or hemispherical dome structure by Flexible Connector, it is ensured that charging
Reliability, has certain interval between the charging pressing plate that also can make and set of cells upper cover plate, it is possible to guarantee set of cells when charging
Ventilation and heat, improve charging security.
Set of cells is furnished with BMS (battery management system), and BMS is provided with independent circumscription socket, and charger is provided with controller, control
Device processed is provided with Signal plug, by Signal plug inserts the circumscription socket of BMS, can allow the information of BMS that controller gathers.
Controller is connected and receives the electric quantity signal of each battery cell that BMS exports with BMS, and controller is charging master control
Device, it, according to the switch element on setting program output make-and-break signal to multipath control switch and charging wire clamp, controls multichannel
When controlling switch, the different switch ways on and off of multipath control switch can be controlled respectively.
Charging pressing plate lower surface is fixed with temperature sensor by Flexible Connector, and temperature sensor is provided with multiple and uniform
Being fixed on the lower surface of charging pressing plate, the Flexible Connector of fixed temperature sensor is long with the Flexible Connector of fixing charging electrode
Spend identical, by the temperature sensor of peripheral hardware, it is possible to precise acquisition battery Current Temperatures, it is to avoid internal system failure causes inside
The exception of temperature parameter, ensure that, by Flexible Connector, the reliability that temperature sensor contacts, it is ensured that parameter accurate, temperature
Degree sensor output temperature signal is to controller, if during temperature anomaly, can carry out stopping the control of charging, it is to avoid anticipate
Outward.
Owing to not only having both positive and negative polarity terminals on upper cover plate, the most substantial amounts of input electrode, for avoiding open circuit accident,
Being fixed with cover sheet on upper cover plate, the corner of cover sheet is provided with fixing hole and is fixed by screws in the upper cover plate of set of cells
On, cover sheet edge is provided with the breach stretched out for both positive and negative polarity terminals, improves charging dress further by increasing cover sheet
Put the stability with the work of matched set of cells and reliability.
The lower surface of charging pressing plate is provided with smoke detectors, and smoke detectors output smoke signal is to controller, it is possible to
When there is the condition of a fire, finding in time to report to the police, four corners of this outer support seat are equipped with and are tilted towards set of cells ejecting extinguishing material
Nozzle, nozzle is connected by the pressure vessel of pipeline with storage fire extinguishing material, and pipeline is provided with electromagnetic valve, and controller output controls
Signal is to electromagnetic valve, moreover it is possible to carry out fire extinguishing process when there is the condition of a fire.
Charging device of the present invention is safe and convenient to use, after taking off cover sheet before use, set of cells is placed on support
In seat, plugging Signal plug on BMS, control lower air cylinder and decline, charger charges according to the program set afterwards, fills
After electricity terminates, lower air cylinder rises, and charging pressing plate rises therewith, takes off set of cells, loads onto cover sheet and i.e. complete the most equal
Weighing apparatus charging.
The control method of active charge equalization system based on described many DC:
Charger starts, and charging wire clamp charges to set of cells, when BMS system detects all batteries of a certain battery unit
After monomer all reaches charge protection voltage, charging wire clamp stops charging；
Open each switch ways of multipath control switch successively, all battery units are individually charged, if currently filling
Close current switch path after all battery cells reach charge protection voltage in the battery unit of electricity, open next one switch logical
Road, until all switch ways complete once to open.
The output electric current of the charging wire clamp output electric current more than DC-DC, DC-DC carries out constant voltage equalizaing charge.It is the most former
Reason is that charging starting stage charger carries out constant-current charge to set of cells, with bigger electric current by set of cells close to " being full of ".When
After BMS system detects that a certain battery unit takes the lead in reaching charge protection voltage, charger stops constant-current charge；Then at BMS
Under the control of system, DC-DC is carried out constant voltage successively and " equalizes " charging by variable connector to all battery units, until all lists
After body all reaches charge protection voltage, charging stops.The most all monomers are each filled with, and reach target.
If controller receives temperature anomaly signal (exceeding design temperature), then charge closing machine reporting to the police, rise simultaneously
Charging pressing plate, allows heat disperse as early as possible, it is to avoid breaking out of fire, if controller receives smog abnormal signal, (smokescope exceedes
Design temperature), then opens solenoid valve reporting to the police, and keep pressing plate pressed status of charging, under charging pressing plate, pressure energy enough reduces inside
Oxygen intake avoids the condition of a fire to expand, and coordinates fighting nozzle can effectively control the condition of a fire.
Above in conjunction with accompanying drawing, the present invention is exemplarily described, it is clear that the present invention implements not by aforesaid way
Restriction, as long as have employed the method design of the present invention and the improvement of various unsubstantialities that technical scheme is carried out, or without changing
Enter and design and the technical scheme of the present invention are directly applied to other occasion, all within protection scope of the present invention.
Claims (10)
1. active charge equalization system based on many DC, system includes charger and set of cells to be charged, described set of cells
Being made up of between upper cover plate and lower cover multiple battery cell pack, described battery unit is made up of multiple battery cells, institute
Stating charger and be provided with two charging wire clamps connecting set of cells both positive and negative polarity terminals respectively, described set of cells is provided with BMS, its feature
It is:
Described charger exports one of them all by multipath control switch of electric energy extremely multiple DC-DC, each described DC-DC and opens
Closing path and connect charging electrode, the switch ways quantity of described multipath control switch is identical with the battery unit quantity of set of cells,
Each described battery unit is equipped with independent input electrode, and described input electrode is each attached to the upper surface of upper cover plate；
Described charger is provided with the support seat of placing battery group, and described support seat is arranged over the pressing plate that charges, described charging pressing plate
Being fixed on lower air cylinder, described charging electrode is fixed on the lower surface of charging pressing plate, and described charging pressing plate lower surface passes through bullet
Property connector be fixed with temperature sensor, described temperature sensor output temperature signal to controller, described controller is with BMS even
Connecing and receive the electric quantity signal of each battery cell of BMS output, described controller output make-and-break signal is to multipath control switch
With the switch element on charging wire clamp.
Active charge equalization system based on many DC the most according to claim 1, it is characterised in that: described input electrode
For the conductive metal sheet of depression, described charging electrode is spherical or hemispherical dome structure and is fixed on charging voltage by Flexible Connector
Plate lower surface.
Active charge equalization system based on many DC the most according to claim 1 and 2, it is characterised in that: described upper cover
Being fixed with cover sheet on plate, the corner of described cover sheet is provided with fixing hole and is fixed by screws in the upper cover plate of set of cells
On, described cover sheet edge is provided with the breach stretched out for both positive and negative polarity terminals.
Active charge equalization system based on many DC the most according to claim 3, it is characterised in that: described support seat
On at least provided with two protrude leads, described charging pressing plate is provided with the pilot hole matched with lead, described support
Seat is provided with the cavity matched with set of cells lower cover.
Active charge equalization system based on many DC the most according to claim 4, it is characterised in that: described charging pressing plate
Lower surface be provided with smoke detectors, described smoke detectors output smoke signal to controller, four turnings of described support seat
Place is equipped with the nozzle being tilted towards set of cells ejecting extinguishing material, and described nozzle is held by the pressure of pipeline with storage fire extinguishing material
Device connects, and described pipeline is provided with electromagnetic valve, and described controller outputs control signals to electromagnetic valve.
Active charge equalization system based on many DC the most according to claim 1, it is characterised in that: described temperature sensing
Device is provided with lower surface that is multiple and that be uniformly fixed on charging pressing plate, and the Flexible Connector of described fixed temperature sensor fills with fixing
The Flexible Connector length of electricity electrode is identical.
7. the control method of active charge equalization system based on DC many described in claim 1-6, it is characterised in that:
Charger starts, and charging wire clamp charges to set of cells, when BMS system detects all battery cells of a certain battery unit
After all reaching charge protection voltage, charging wire clamp stops charging；
Open each switch ways of multipath control switch successively, all battery units are individually charged, if current charging
Close current switch path after all battery cells reach charge protection voltage in battery unit, open next switch ways,
Until all switch ways complete once to open.
8. the control method described in 7 on request according to right, it is characterised in that: the output electric current of described charging wire clamp is more than DC-
The output electric current of DC, described DC-DC carries out constant voltage equalizaing charge.
9. the control method described in 7 or 8 on request according to right, it is characterised in that: if controller receives temperature anomaly signal,
Then charge closing machine reporting to the police, if controller receives smog abnormal signal, then opens solenoid valve reporting to the police.
10. the control method described in 9 on request according to right, it is characterised in that: if controller receives temperature anomaly signal, with
Shi Shangsheng charges pressing plate, if controller receives smog abnormal signal, then keeps charging pressing plate pressed status.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610647082.8A CN106100064A (en) | 2016-08-09 | 2016-08-09 | Active charge equalization system based on many DC and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610647082.8A CN106100064A (en) | 2016-08-09 | 2016-08-09 | Active charge equalization system based on many DC and control method thereof |
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| CN106100064A true CN106100064A (en) | 2016-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610647082.8A Pending CN106100064A (en) | 2016-08-09 | 2016-08-09 | Active charge equalization system based on many DC and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108847696A (en) * | 2018-06-19 | 2018-11-20 | 安徽师范大学 | A kind of battery charging equalization apparatus and equalization methods |
| CN110935655A (en) * | 2019-11-15 | 2020-03-31 | 上海理工大学 | Self-discharge rapid screening method based on branch current change of parallel battery pack |
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| CN110935655A (en) * | 2019-11-15 | 2020-03-31 | 上海理工大学 | Self-discharge rapid screening method based on branch current change of parallel battery pack |
| CN110935655B (en) * | 2019-11-15 | 2021-12-14 | 上海理工大学 | Self-discharge rapid screening method based on branch current change of parallel battery pack |
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Application publication date: 20161109 |