2024大型锂离子电池测试仿真与早期失效探伤.docx
大型方壳锂离子电池的测试仿真与早期失效探伤Outline提纲IInfmduGtion弓言 MechanicalTestingof1.arge-formatPrismatic1.ithium-ionBatteries(1.IBs)大型方壳锂离子电池的机械加载测试 NumericalModellingof1.arge-formatPrismatic1.ithium-ionBatteries(1.IBs)大型方壳电池挤压失效的建模和仿真 EarlyFailureDiagnosisof1.IBsUsingElectrochemicalImpedanceSpectrum(EIS)基于电化学阻抗谱的方壳电池早期探伤方法 Summary慧懿FireaccidentsofEVsduetoCraSh电动汽车碰撞起火事故事故地点2016201920202017201.<j2019.20恪*11年度尤西比曲南邮政画幄Crf副乐出喻t(bQE湛笛捧翊赣起沸儆 May26thl20201ShenzhentanelectricworkvancaughtfireaftercollisionTractionbatteryunderwentmechanicalfailureunderimpact,triggeringinternalshort-circuit(SC)andthermalrunaway Jan19th,2021,Shanghai,anEVcaughtfirewhenparking.ItissuspectedthatthevehicleonceunderwentundercarriageimpactandnoSCoccurredTractionbatterysufferedadequatemechanicaldeformationwithoutimmfidiatfiSCCCCUiTanC色ResearchObjective： extractboundaryconditionfor1.IBstypicalvehiclecollisionscenarios establishsafetyenvelopefor1.IBsundermechanicalabuse modelmechanicalbehaviorof1.IBsunderdynamicindentation detectfailureriskof1.IBsundergentledeformation00liaeciHtsofEVsduetoCraSh电动汽车碰撞起火事故IInfmduGtion弓|言 MechanicalTestingof1.arge-formatPrismatic1.ithium-ionBatteries(1.IBs)大型方壳锂离子电池的机械加载测试 NumericalModellingof1.arge-formatPrismatic1.ithium-ionBatteries(1.IBs)大型方壳电池挤压失效的建模和仿真 EarlyFailureDiagnosisof1.IBsUsingElectrochemicalImpedanceSpectrum(EIS)基于电化学阻抗谱的方壳电池早期探伤方法 Summary慧懿爆期鞭蹴激解暨幽嬲解碰撞起火事故 AMmm所公讪-availableprismaticcell(1.×W×H220×102×66mm3) Boundaryconditionsextractedfromtypicalvehiclecollisionscenarios Jellyrollandcellleveltest(0%SoC)IDB出汨Ii闻案二上BKI【1总砥俏（曲麟局17D50Cylindricalhead)7D50Cylindricalhead1ms375m/s1Y£承武威眼1Ud5X幅IN趟选制fcU1m/s4X陷”5liO对5m.<7YD25Hemisphericalhead、m/min8YD25Hemisphericalhead1m.s0VD25Hemisphericalhead5m/sFireaccidentsofEVsduetoCraSh电动汽车碰撞起火事故7hGe.>S,tI.ZMc.1.dal.SAIlinv.1l,uvf'i'l-OI-0755,2021,doi:10.4271/2021-01-0755鞭煲砥”般8f伸BSduetocrash电动汽车碰撞起火事故16012080400(NX)®p-oxZiirfbrJeltyroM-Z.CY1.D502m11Vmi1ms5msXdi假EieflYdiration二-二f Considerableorthotropicmechanicalpropertiesunderthreetestdirections Only1.IBsunderZ-directionimpactexperiencesignificantrate-strengtheningeffect,whileloadingfromXandYdirectionprovidesmoderaterate-dependence,respectively Non-IinearmechanicalpropertiesunderZ-directionareseenunderQSloading,andmuchweakernonlinearresponsesarefoundunderdynamicloading DisplacementsatfailureareonlyproportionaltoloadingrateunderZ-directionloading歌包眺uetoCraSh电动汽车碰撞起火事故BUnderZ-directionloading,ashearbandformedthroughthicknessdirectionandcausedSCoccurrence;densificatioofactivelayertookplaceunderdentUnderX-directionloading,signsOfjellyrollbendingwereseen,andmicro-cracksfm11AdaathAdAtUnderY-directionloading,jellyrolldelaminationandlocalizedbendingoccurredIIDensification,IVshearfailure-ADensificationunderdent,micro-cracks,localizedbendingDelaminationrlocalizedbending=r尸道南娥号晚岁即EVsduetocrash电动汽车碰撞起火事故(NX)。O1.fl1632,r?CCcXtC(NX)801.IACXA(Nx)。O1.YdirectionCellY,SPH-D25Kklir1ms5ms；NoSCoccurrence;40Dfl16"立C如STkM:仲, Considerableorthotropicmechanicalpropertiesunderthreetestdirections Significantrate-strengtheningeffectinZdirection,andstrongstructuraloscillationinXandYdirectionsunderdynamicindentation SCoccurrenceisnotseenunderY-directionloadingduetofailureofmetalhousinganddelaminationofiellyrolls00liaeciHtsofEVsduetoCraSh电动汽车碰撞起火事故IInfmduGtion弓|言 MechanicalTestingof1.arge-formatPrismatic1.ithium-ionBatteries(1.IBs)大型方壳锂离子电池的机械加载测试 NumericalModellingof1.arge-formatPrismatic1.ithium-ionBatteries(1.IBs)大型方壳电池挤压失效的建模和仿真 EarlyFailureDiagnosisof1.IBsUsingElectrochemicalImpedanceSpectrum(EIS)基于电化学阻抗谱的方壳电池早期探伤方法 Summary慧懿E>三S三嘱棚需幌蟒嬲避射撞起火事故Under1.S-DYNA, AnisotropichoneycombmaterialMAT126(MATMODIFIEDHONEYCOMB)ischosentodescribematerialpropertiesofiellrolls Hardeningcurvesunderthreeprincipaldirectionsandsheardirections,rate-Strenqtheninqcun/esandfailurecriteriacoefficientaredefinedbasedontestresults:t;,.a.残食Ib亭骂室.硬«fiIO2468Naturalk>riihnofMrainUICl11inFEmodelsCurvesforthreedirections11h.I.(.Wa.-.1.I.h,1Ic(.dWlk<.ll,.1(?I-OI-0755.2021,doi:10.4271/2021-Ol-0755娱制舐兆明R朝胁汽车碰撞起火事故JglIyrQlIs*T<<90¾mPointD三1.ocalfailureareaexpandstillfinalfractureu金;皿超，：&qPointB=ForcepeakisreachedPointAi1.ocalfailureinitiatesandabruptforcedropPointCIncalfailureC2isasfrcpdclin露雌雌蝌濯联”造呢P的腿动汽车碰撞起火事故(b)Ib-HI'''<'f¥1'<I»*»'nNmI!即F:WISlflgcu2mnmmSlnMbmmnunTelmSwl11Tet*S*v¼-S11w*511¼l%扁讪斓加殖(C)1TgI-3”，"<mj0bai2uucDhn1.mw(m)23Tv-2mmnnSiMMi-Zmmmtn-TcM-Iini-SInw
