Seite - 127 - in Emerging Technologies for Electric and Hybrid Vehicles
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Energies 2016,9, 563
influencedbythedischargerate,but thebatterycapacity isalsodiminishedathighdischargerates.
Thisoccursasasharpvoltagedropat theendof thedischargeprocess,as indicatedinFigure1.At that
rate thedischarge terminatesatVcut-off [4].
Figure1.Typicaldischargecharacteristic curveofLi-ionbattery [4,5].
The vehicle under test (VUT) is equippedwith battery cells of a cathode type LiFeMgPO4.
Lithium iron phosphate cells are characterized by their flat open circuit voltage curve (OCV).
Hence, the cell voltage staysalmost constantover thecomplete stateof charge (SOC) range [2,3,6].
Thebatterypackof theVUTconsistsof19modules. Eachmodulecomprisessixcellblocksconnected
inseries;asinglecellblock isconstructedoutof50LiFeMgPO4–graphitecells, connected inparallel.
In total, thereare300cellswithin thesinglebatterymodule. Eachcellblockhasanominalvoltageof
3.2V,amountingtoatotalvoltageof19.2V.ThebatteryspecificationsaregiveninTable1.AController
AreaNetwork (CAN)communicationenvironment isused for thecontrol andmanagementof the
batterymodules.More technical informationabout theVUTisavailable in theAppendix.
Table1.TechnicaldataofLiFeMgPO4Battery [7].
Parameter (Unit) Value
NominalModuleVoltage (V) 19.2
NominalModuleCapacity (Ah) 69
MaxContinuousLoadCurrent (A) 120
PeakCurrent for30s (A) 200
Inthispaper,wewill investigatethedifferentbatterymodelingmethodstodecidewhichapproach
willbe themostappropriate formodeling thebatterypackofVUT.Then,wewill selectagroupof the
most thoroughmodels forLi-ionbatteries. Thesemodelswill contribute to thedevelopmentof the
proposedbatterymodel,whichwillbeconsideredformodelingactualbatterypackvoltageresponse
whentheVUTundergoesseveredrivingmaneuvers.
Thepaper isorganizedas follows. Section2presents thedifferentmodeling techniquesofLi-ion
batteries. Threemodelsareelected fromthereviewedmodelsandarediscussed inmoredetails in
Section3. InSection4 the thermalbehaviorof thebattery iselaborated. Theexperimental testsare
described in Section 5. Themodels are evaluated and anew, improvedmodel is developed and
proposedinSection6. Finally, theconclusionsarestatedat theendof thepaper.
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Emerging Technologies for Electric and Hybrid Vehicles
- Titel
- Emerging Technologies for Electric and Hybrid Vehicles
- Herausgeber
- MDPI
- Ort
- Basel
- Datum
- 2017
- Sprache
- englisch
- Lizenz
- CC BY-NC-ND 4.0
- ISBN
- 978-3-03897-191-7
- Abmessungen
- 17.0 x 24.4 cm
- Seiten
- 376
- Schlagwörter
- electric vehicle, plug-in hybrid electric vehicle (PHEV), energy sources, energy management strategy, energy-storage system, charging technologies, control algorithms, battery, operating scenario, wireless power transfer (WPT)
- Kategorie
- Technik