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并行风冷的方形动力锂电池组温度仿真分析.docx

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并行风冷的方形动力锂电池组温度仿真分析 Title:ThermalSimulationAnalysisofParallelAir-CooledSquarePowerLithium-ionBatteryPacks Abstract: Temperaturemanagementisacriticalaspectofbatterypackdesignforelectricvehicles,ensuringoptimalperformanceandextendingbatterylife.Thispaperfocusesonthethermalsimulationanalysisofaparallelair-cooledsquarepowerlithium-ionbatterypack.Theaimofthisstudyistoevaluatethethermalbehaviorofthebatterypackandproposeeffectivecoolingstrategiesfortemperatureregulation. Introduction: Lithium-ionbatteriesarewidelyusedinvariousapplicationsduetotheirhighenergydensityandlongcyclelife.However,excessivetemperaturecannegativelyimpactbatteryperformance,safety,andlongevity.Therefore,itiscrucialtoimplementefficientcoolingstrategiestomaintainthebatterypackwithinitsoperatingtemperaturerange.Inthispaper,weanalyzethethermalbehaviorofaparallelair-cooledsquarepowerlithium-ionbatterypack. BatteryPackConfiguration: Thebatterypackconsistsofseveralsquare-shapedpowerlithium-ionbatterymodules,connectedinparallel,tomeetthepowerrequirementsofelectricvehicles(EVs).Themodulardesignallowsforeasyreplacementandrepair,aswellasflexiblecapacityscaling. ThermalSimulationModel: Tosimulatethethermalbehaviorofthebatterypack,athree-dimensionalcomputationalfluiddynamics(CFD)modelisdeveloped.Themodelconsiderstheheatgenerationinsidethebatterycells,thermalconductivitypropertiesofthebatterymaterials,andairflowcharacteristicswithinthecoolingsystem.Thesimulationaccountsforvariousoperatingconditions,includingcharging,discharging,andregenerativebraking. HeatGenerationAnalysis: Thefirststepintheanalysisistodeterminetheheatgenerationrateofthebatterycellsunderdifferentloadconditions.Thisinformationiscrucialforaccuratethermalsimulation.Theheatgenerationratedependsonfactorssuchascellchemistry,discharge/chargecurrent,andinternalresistance. ThermalConductivityAnalysis: Thethermalconductivitypropertiesofbatterymaterials,includingtheseparators,electrodes,andbatteryhousing,playasignificantroleinheatdissipation.Thesimulationmod