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1、第52卷第8期机械工程学报Vol.52No.82016年4月JOURNALOFMECHANICALENGINEERINGApr.2016DOI：10.3901/JME.2016.08.141基于动态内热源特性的车用锂离子动力电池*温度场仿真及试验1,21,21,2刘霏霏兰凤崇陈吉清(1.华南理工大学机械与汽车工程学院广州510641；2.华南理工大学广东省汽车工程重点实验室广州510641)摘要：针对电动汽车动力电池在充放电工作过程中由于热量聚集而导致的温度场非均匀性问题，采用数值仿真与试验相结合的方法，基于电池内阻温升特性，考虑耦合正负极耳的热影响，建立生热速率
2、的时变内热源模型，获得更加精确的电池温度场分布及其动态变化规律，并深入进行温度一致性分析。以某车用锂离子动力电池为样本，对电池单体及模块分别进行温升计算和三维温度场分析及相应的测试试验。结果表明：同一充/放电倍率下，放电温升明显大于充电温升，且电池最大温差随着倍率的增大而增大；电池的温升是一个随时间先增大后恒定的非线性变化过程，且随着放电倍率的增大电池温升速率越大；电池模块温度场并非电池单体温度场的简单叠加，且在相同充放电倍率下电池模块的热一致性不如电池单体。关键词：锂离子动力电池；时变内热源模型；温度场中图分类号：U464SimulationandExperim
3、entonTemperatureFieldofLithium-ionPowerBatteryforVehicleBasedonCharacteristicofDynamicHeatSource1,21,21,2LIUFeifeiLANFengchongCHENJiqing(1.SchoolofMechanical&AutomotiveEngineering,SouthChinaUniversityofTechnology,Guangzhou510641;2.GuangdongKeyLaboratoryofAutomotiveEngineering,SouthChi
4、naUniversityofTechnology,Guangzhou510641)Abstract：Toresearchthenon-uniformtemperaturefieldofpowerbatteryforelectricvehicleduringcharge/dischargeoperation,usingthemethodcombiningnumericalsimulationandexperiment,basedonthecharacteristicoftemperature-riseinbatterycausedbyitsinternalresis
5、tance,couplingthermaleffectofanodeandcathode,thetime-varyingheatsourcemodelisestablishedtoobtainmoreaccurateanddynamicchangingdistributionofbatterytemperaturefield.Alithium-ionpowerbatteryforvehicleistakenasasample,three-dimensionaltemperaturefieldandtemperaturerisecalculationofbatter
6、ycellandmoduleareanalyzed,andthecorrespondingexperimentsaretaken.Resultsshowthat,thetemperatureriseofdischargingsignificantlygreaterthanthatofchargingatthesamecharge/dischargerate,andthemaximumtemperaturedifferenceofcellincreaseswiththerisingofrate;Thetemperatureriseofthebatteryisanon
7、linearprocessthatfirstincreasesthenbecomesconstantvaryingwiththetime,andishigherwiththeincreaseofdischargerates;Thetemperaturefieldofbatterymoduleisnotasimplesuperpositionwiththetemperaturefieldofbatterycells,andthethermalconsistencyofbatterymoduleisnotasgoodasthatofbatterycellunderth
8、esame
