电池参数设置

DescriptionTheBatteryblockimplementsagenericdynamicmodelparameterizedtorepresentmostpopulartypesofrechargeablebatteries.Theequivalentcircuitofthebatteryisshownbelow:Lead-AcidModelDischargemodel(i*0)f1(it,i∗,i,Exp)=E0−K⋅QQ−it⋅i∗−K⋅QQ−it⋅it+Laplace−1(Exp(s)Sel(s)⋅0).ChargeModel(i*0)f2(it,i∗,i,Exp)=E0−K⋅Qit+0.1⋅Q⋅i∗−K⋅QQ−it⋅it+Laplace−1(Exp(s)Sel(s)⋅1s).Lithium-IonModelDischargeModel(i*0)f1(it,i∗,i)=E0−K⋅QQ−it⋅i∗−K⋅QQ−it⋅it+A⋅exp(−B⋅it).ChargeModel(i*0)f2(it,i∗,i)=E0−K⋅Qit+0.1⋅Q⋅i∗−K⋅QQ−it⋅it+A⋅exp(−B⋅it).Nickel-CadmiumandNickel-Metal-HydrideModelDischargeModel(i*0)f1(it,i∗,i,Exp)=E0−K⋅QQ−it⋅i∗−K⋅QQ−it⋅it+Laplace−1(Exp(s)Sel(s)⋅0).ChargeModel(i*0)f2(it,i∗,i,Exp)=E0−K⋅Qit+0.1⋅Q⋅i∗−K⋅QQ−it⋅it+Laplace−1(Exp(s)Sel(s)⋅1s),where,EBatt=Nonlinearvoltage(V)E0=Constantvoltage(V)Exp(s)=Exponentialzonedynamics(V)Sel(s)=Representsthebatterymode.Sel(s)=0duringbatterydischarge,Sel(s)=1duringbatterycharging.K=Polarizationconstant(Ah−1)orPolarizationresistance(Ohms)i*=Lowfrequencycurrentdynamics(A)i=Batterycurrent(A)it=Extractedcapacity(Ah)Q=Maximumbatterycapacity(Ah)A=Exponentialvoltage(V)B=Exponentialcapacity(Ah)−1Theparametersoftheequivalentcircuitcanbemodifiedtorepresentaparticularbatterytype,basedonitsdischargecharacteristics.Atypicaldischargecurveiscomposedofthreesections,asshowninthenextfigure:Thefirstsectionrepresentstheexponentialvoltagedropwhenthebatteryischarged.Dependingonthebatterytype,thisareaismoreorlesswide.Thesecondsectionrepresentsthechargethatcanbeextractedfromthebatteryuntilthevoltagedropsbelowthebatterynominalvoltage.Finally,thethirdsectionrepresentsthetotaldischargeofthebattery,whenthevoltagedropsrapidly.Whenthebatterycurrentisnegative,thebatterywillrechargefollowingachargecharacteristicasshownbelow:Notethattheparametersofthemodelarededucedfromdischargecharacteristicsandassumedtobethesameforcharging.TheExp(s)transferfunctionrepresentsthehysteresisphenomenonfortheLead-Acid,NiCDandNiMHbatteriesduringchargeanddischargecycles.Theexponentialvoltageincreaseswhenbatteryischarging,nomattertheSOCofthebattery.Whenthebatteryisdischarging,theexponentialvoltagedecreasesimmediately:DialogBoxandParametersParametersTabBatterytypeProvidesasetofpredeterminedchargebehaviorforfourtypesofbattery:Lead-AcidLithium-IonNickel-CadmiumNickel-Metal-HydrideNominalVoltage(V)Thenominalvoltage(Vnom)ofthebattery(volts).Thenominalvoltagerepresentstheendofthelinearzoneofthedischargecharacteristics.RatedCapacity(Ah)Theratedcapacity(Qrated)ofthebatteryinampere-hour.Theratedcapacityistheminimumeffectivecapacityofthebattery.InitialState-Of-Charge(%)TheinitialState-Of-Charge(SOC)ofthebattery.100%indicatesafullychargedbatteryand0%indicatesanemptybattery.Thisparameterisusedasaninitialconditionforthesimulationanddoesnotaffectthedischargecurve(whentheoptionPlotDischargeCharacteristicsisused).UseparametersbasedonBatterytypeandnominalvaluesLoadthecorrespondingparametersintheentriesofthedialogbox,dependingontheselectedBatterytype,theNominalVoltageandtheRatedCapacity.Whenapresetmodelisused,thedetailedparameterscannotbemodified.Ifyouwanttomodifythedischargecurve,selectthedesiredbatterytypetoloadthedefaultparameters,andthenunchecktheUseparametersbasedonBatterytypeandnominalvaluescheckboxtoaccessthedetailedparameters.MaximumCapacity(Ah)Themaximumtheoreticalcapacity(Q),whenadiscontinuityoccursinthebatteryvoltage.Thisvalueisgenerallyequalto105%oftheratedcapacity.FullychargedVoltage(V)Thefullychargedvoltage(Vfull),foragivendischargecurrent.Notethatthefullychargedvoltageisnottheno-loadvoltage.NominalDischargeCurrent(A)Thenominaldischargecurrent,forwhichthedischargecurvehasbeenmeasured.Forexample,atypicaldischargecurrentfora1.5AhNiMHbatteryis20%oftheratedcapacity:(0.2*1.5Ah/1h=0.3A).InternalResistanceTheinternalresistanceofthebattery(ohms).Whenapresetmodelisused,agenericvalueisloaded,correspondingto1%ofthenominalpower(nominalvoltage*ratedcapacityofthebattery).Theresistanceissupposedtobeconstantduringthechargeandthedischargecyclesanddoesnotvarywiththeamplitudeofthecurrent.Capacity(Ah)@NominalVoltageThecapacity(Qnom)extractedfromthebatteryuntilthevoltagedropsunderthenominalvoltage.ThisvalueshouldbebetweenQexpandQmax.Exponentialzone[Voltage(V),Capacity(Ah)]Thevoltage(Vexp)andthecapacity(Qexp)correspondingtotheendoftheexponentialzone.ThevoltageshouldbebetweenVnomandVfull.Thecapacityshouldbebetween0andQnom.ViewDischargeCharacteristicsTabPlotDischargeCharacteristicsClicktoplotafigurecontainingtwographs.Thefirstgraphrepresentsthenominaldischargecurve(attheNominalDischargeCurrent)andthesecondgraphrepresentsthedischargecurvesatthespecifieddischargecurrents.DischargecurrentAllowstospecifydifferentvaluesofdischargecurrent.Thedischargecharacteristicsforthesecurrentsarepresentedinthesecondpartofthegraph.UnitsChooseeitherTimeorAmpere-hourasthex-axisfortheplot.BatteryDynamicsTabBatteryresponsetime(s)Theresponsetimeofthebattery(at95%ofthefinalvalue).Thisvaluerepresentsthevoltagedynamicsandcanbeobservedwhenacurrentstepisapplied:Inthisexample,abatteryresponsetimeo