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ISSN100020054CN1122223/N()JTsinghuaUniv(Sci&Tech),20105082010,Vol.50,No.834/39129321296,1301SOC,,(,100084):2009205229:(1983),(),,:,,E2mail:ouymg@tsinghua.edu.cn:SOC(stateofcharge),3.2V/11Ah,SOC,SOC:;SOC;;:U464.9+3:A:100020054(2010)0821293204ComparisonofmethodsforimprovingSOCestimationaccuracythroughanampere2hourintegerationapproachLIZhe,LULanguang,OUYANGMinggao(StateKeyLaboratoryofAutomotiveEnergyandSafety,TsinghuaUniversity,Beijing100084,China)Abstract:Accuratevaluesoftheampere2hourintegrationparametersarenecessarytoaccuratelyestimatebatterySOC(stateofcharge).Differentmethodshaveconcentratedoncorrectingvariousparameters.However,thereisinsufficientinformationontheimportanceofeachparameterontheSOCaccuracy.Testswereconductedona3.2V/11AhpowerLiFePO4Li2ionbatterytoaccuratelydescribetheeffectofvariousparametersontheSOCestimationaccuracy.TheresultsshowthattheinitialSOCcorrectionisvitaltotheaccuracy.Keywords:powerbattery;stateofcharge(SOC)estimation;ampere2hourintegrationapproach;accuracySOC(stateofcharge),SOCSOC,[122]SOC,CoulombSOC,,SOC,SOC,SOC,SOC(1),,tSOCSOCt=SOC0-12Ct0Idt.(1):SOC0SOC;1Coulomb,,;2,;C,t0IdtI[0,t],I(1):SOC0SOC0SOC[3];2,2SOCSOH(stateofhealth)[425];,C,,C[627],SOC012CSOC1294()2010,50(8)13.2V/11Ah(),DIGATRONEVT5002500280kW2IGBT():SOC0SOC;OCVSOC;xSOC;2SOC;C22.1SOC0SOC12SOC0SOC,SOC0SOC,SOC0SOC,SOC0SOC,SOC,SOC0SOC,SOC,SOC0,SOC0,33SOC,x,OCV,SOC,OCVSOC;x,OCV,SOC,SOCSOC,4xSOC,x1mV/min5OCVSOC,5,SOC,OCV,OCVSOC,,OCV,SOC0OCVSOCSOC0,:SOC1295,12V/55Ah(Optima)48V/100Ah(),6767,OCV2SOCSOC,OCV3SOCOCV2SOC,,OCV2SOC,SOC0SOC,3SOC02.2Coulomb1,Coulomb1Coulomb[8],Coulomb100%(95%),,SOCCoulomb,C2.42.32212,SOCSOH28SOC2,SOC,2,97%,(1),SOC0=1,21,SOC9SOC,SOC,21,2897%,SOCe3.5%8SOC1296()2010,50(8)9,2SOC,21,2.1SOC0,2SOC,,2SOC0SOC2.4C,,3:(SOH)10,-40,C1/3101150,12,10%,,,,[6],,,,,(1),SOC,SOC,3,C3LiFePO4SOC,,:SOC,SOC,SOC,SOC,,,,SOC(References)[1]MiyamotoH,MorimotoM,MoritaK.On2lineSOCestimationofbatteryforwirelesstramcar[C]//Proceedingsof2007InternationalConferenceonPowerElectronicsandDriveSystems.Bangkok,Thailand,2007.(1301),:1301MAChunsheng,HUANGShilin,ZHANGJinhuan,etal.SimulationsofthelandingofmannedspacecraftwithparachutesusingtheALEmethodinLS2DYNA[J].JTsinghuaUniv(Sci&Tech),2006,46(8):145521457.(inChinese)[6]MeyersMA.[M].,,,.:,2006.[7].Ls2Dyna[M].:,2003.[8],,,.[J].,2005,26(4):4192424.FANGBin,ZHUXi,ZHANGZhenhua,etal.Effectofparametersinnumericalsimulationofunderwatershockwave[J].JournalofHarbinInstituteofTechnology,2005,26(4):4192424.(inChinese)[9]BrettJM.NumericalModellingofShockWaveandPressurePulseGenerationbyUnderwaterExplosions,AR20102558[R].Commonwealth,Australia:DSTOAeronauticalandMaritimeResearchLaboratory,1998.[10],,,.[J].,2000,15(3):2762286.XUANJianming,MIUYi,CHENGJun,etal.Testandtheoreticalresearchonwaterlandingcharacteristicsofspacecapsule[J].JournalofHydrodynamics,2000,15(3):2762286.(inChinese)[11].[M].:,2005.[12].[M].:,2004.(1296)[2],,.SOC[J].,2006,16(4):3912394.WUDongxing,GUANDaozheng,QIGuoguang.Researchonhybridelectricvehiclepsbatterymanagementsystemwithhigh2precisionforecastofstateofcharge(SOC)[J].HighTechnologyLetters,2006,16(4):3912394.(inChinese)[3]LeeSJ,KimJH,LeeJM,etal.ThestateandparameterestimationofaLi2ionbatteryusinganewOCV2SOCconcept[C]//Proceedingsof2007IEEEPowerElectronicsSpecialistsConference.Orlando,USA,2007.[4],,.[J].,2005,29(1):49251.LIHonglin,SUNFengchun,ZHANGChengning.Testanalysisfortractionbatterycharginganddischargingefficiency[J].ChineseJournalofPowerSource,2005,29(1):49251.(inChinese)[5],.[J].,2009,32(3):2792282.HUMinghui,QINDatong.TheefficiencyofaNi2MHbatteryusedinhybridvehicles[J].JournalofChongqingUniversity,2009,32(3):2792282.(inChinese)[6],,,.LiFePO4[J].,2009,39(1):30232.LIZhe,TONGMeng,LULanguang,etal.Capacitycharacteristicsofpowerlead2acidandLiFePO4Li2ionbatteries[J].BatteryBimonthly,2009,39(1):30232.(inChinese)[7],,,.HEV[J].,2008,38(1):27230.TIANShuo,LIZhe,LULanguang,etal.Themaximalcharge2dischargeperformanceofpowerstoragebatteryinHEV[J].BatteryBimonthly,2008,38(1):27230.(inChinese)[8],.[J].,1985,4(11):41246.LIHulin,HUANGLinlin.Coulombanalysisanditsapplication[J].AnalyticalLaboratory,1985,4(11):41246.(inChinese)