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1、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
2、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,
3、2021,Shanghai,anEVcaughtfirewhenparking.ItissuspectedthatthevehicleonceunderwentundercarriageimpactandnoSCoccurredTractionbatterysufferedadequatemechanicaldeformationwithoutimmfidiatfiSCCCCUiTanC色ResearchObjective： extractboundaryconditionfor1.IBstypicalvehiclecollisionscenarios establishsafetyenvel
4、opefor1.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-for
5、matPrismatic1.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.WH22010266mm3) Boundaryconditionsextractedfromtypicalvehiclecollisionscenarios Jellyrollandcel
6、lleveltest(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.S,tI.ZMc.1.dal.SAIlinv.1l,uvfil-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
7、-二f Considerableorthotropicmechanicalpropertiesunderthreetestdirections Only1.IBsunderZ-directionimpactexperiencesignificantrate-strengtheningeffect,whileloadingfromXandYdirectionprovidesmoderaterate-dependence,respectively Non-IinearmechanicalpropertiesunderZ-directionareseenunderQSloading,andmuchw
8、eakernonlinearresponsesarefoundunderdynamicloading DisplacementsatfailureareonlyproportionaltoloadingrateunderZ-directionloading歌包眺uetoCraSh电动汽车碰撞起火事故BUnderZ-directionloading,ashearbandformedthroughthicknessdirectionandcausedSCoccurrence;densificatioofactivelayertookplaceunderdentUnderX-directionloa
9、ding,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
10、?CCcXtC(NX)801.IACXA(Nx)。O1.YdirectionCellY,SPH-D25Kklir1ms5ms；NoSCoccurrence;40Dfl16立C如STkM:仲, Considerableorthotropicmechanicalpropertiesunderthreetestdirections Significantrate-strengtheningeffectinZdirection,andstrongstructuraloscillationinXandYdirectionsunderdynamicindentation SCoccurrenceisnot
11、seenunderY-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
12、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 Hardeningcurvesunderthreeprincipaldirectionsandsheardirectio
13、ns,rate-Strenqtheninqcun/esandfailurecriteriacoefficientaredefinedbasedontestresults:t;,.a.残食Ib亭骂室.硬fiIO2468NaturalkriihnofMrainUICl11inFEmodelsCurvesforthreedirections11h.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*T90mPointD三1.ocalfailureareaex
14、pandstillfinalfractureu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-HIf1I*nNmI!即F:WISlflgcu2mnmmSlnMbmmnunTelmSwl11Tet*S*v-S11w*511l%扁讪斓加殖(C)1TgI-3”，mj0bai2uucDhn1.mw(m)23Tv-2mmnnSiMMi-Zmmmtn-TcM-Iini-SInw
15、-1wTekISm、-Simu5w-NXPd.-蜘茴的涌麻Xdirectioimpactimpact00liaeciHtsofEVsduetoCraSh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.
16、IBsUsingElectrochemicalImpedanceSpectrum(EIS)基于电化学阻抗谱的方壳电池早期探伤方法 Summary慧懿AluminumplateIndenterX-directioniridbita6rtForcesensors-SteelplatesTestbatteryConstraintbatteriesY-directioniidbita,fronIn-planeindentationisextractedfromsidepoleimpactandundercarriageimpactIn-planeindentationleadstojellyrollb
17、ucklingandri国ZEinatidFiWeadoptedstepwiseIoadinqteststoobservechangeofEISspectrumbeforeSCoccurrence(Z)E-TRe(Z)Xiao.F-Xim.BrKOnee1.,XkY.Enenv.2021.doi:e115.2021.i2085520X-directionindentation0mm5mm10mm.05.0.5(CE)(Z)E一，15mm20mm25mm05101520Intrusion(mm)Io(feBUP-JPdpU(ClU)goussox.5.5.5.53.2.1.0.Y-drficto
18、nin11Atatin2.0111-50501.1.SS(CE)(Z)EI，.593.6.0Re(Z)(m) AbruptshiftsofEISareseenatintrusionsearlierthanSCoccurrencepoint8 ConsiderablechangeofRj凡/andCPEarefound406222Il(工)8UoBdPUIntrusion(mm)酬臊哪收朗垢曼车碰撞起火O51.O.(CW)(Z)E.2021-05-3107:19:24XCT17mm侵入量底部方向S-21.53.04.56.07.55051.1.O.(CW)N)WT0.0Intrusion(mm)
19、Intrusion(mm)SM三W的酷腿髓动汽车碰撞起火事故.O51O.(Uw)(Z=U.Rc(Z)(m)5951.1.O.E)N三.RaZ)(mH).5Intrusion(mm)(UuO8USS-SVHIntrusion(mm)0502!I(t8uspedeuunload(0ul)8us*soH32AnodeCathodeAnodeCathodeDe-bondingbetweenactiveparticleandconductivematrixamonganodesandcathodesunderin-planeloading“祀物汽车碰撞起火事故.05.051.1.0.U(UE)(Z)TO
20、veralljellyrollbucklingandelectrodedelaminationcausedbyin-planeloadingDe-bondingbetweenactiveparticlesandconductivematrixsimpedeelectrontransferprocessTension-inducedfracture“Bending-inducedfractureEIScannotcompletelyrecovertotheoriginaloneafterunloading,indicatingirreversibledamageinsidebatterycell
21、40T2010ml)8usoEd66543e-bondingbetweenactiveparticlesandconductivematrixis2ieversibleX1Irreversibilityoftheinternaldamageisincompatibledeformation0behaviorsbetweenconductivematrixandcurrentcollector2021-05-3107:20:00SMatra。函结OfEVsduetoCraSh电动汽车碰撞起火Aframeworkfortestingandmodellinglarqe-formatprismatic
22、1.IBsisestablished-Orthotropicmechanicalproperties(deformationpatternandrate-dependenteffect)iswellunderstood-Modellingofprismatic1.IBsisachieved,capturingbothquasi-staticanddynamicmechanicalresponsesEarlyfailurediagnosisfor1.IBsunderin-planeloadingviaEISisproposed- AbruptchangeofEISatasmallintrusionbeforeSCoccurrenceunderin-planeloading- De-bondingofactivematerialandconductivematrixundermechanicaldeformationisirreversible,makingpermeantEISshiftUoDUoneJnoAjojnoA不但qJj
