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1、ISSN1674-8484汽车安全与节能学报,2011年,第2卷第2期12/12CN11-5904/UJAutomotiveSafetyandEnergy,2011,Vol.2No.2181—184SimulationandExperimentonAir-CooledThermalEnergyManagementofLithium-IonPowerBatteriesZHANGJiangyun,ZHANGGuoqing*,ZHANGLei,RAOZhonghao(FacultyofMaterialan
2、dEnergy,GuangdongUniversityofTechnology,Guangzhou510006,China)Abstract:Theair-cooledmethodswereusedforcoolingcommercialLiFePO4batteriestoillustratetheeffectofheattransferenhancement.ThecommercialLiFePO4batteriesweretestedat15-35A.Thetemperaturedistribu
3、tioninasinglebatterywasnumericallysimulatedaccordingtotheexperimentaldata.Airflowacrosstwoandthreebatterieswassimulatedtoillustratetheair-cooledeffect.Experimentalandsimulationresultsshowthatair-coolahasapositivesignificanceforthebatterythermalmanagement
4、atdischargingcurrentsof0-30A.Fordischargingcurrentslessthan30A,thepeaktemperatureinbatteriesislessthan50℃,whilethetemperaturedifferencebetweenbatteriesisstillmorethan5℃.Whenthedischargingcurrentishigherthan30A,air-coolingforbatteriesandbatterypackscann
5、otguaranteeevenlytemperaturedistribution,notbeingabletomeetthereguirementofbatteriyheatdissipation.Keywords:powerbatteries;lithium-ionbatteries;air-cooled;thermalmanagement锂电池热管理中空气冷却效果的实验与模拟张江云,张国庆*,张磊,饶中浩(广东工业大学材料与能源学院,广州510006)摘要:把空冷方法用于商业磷酸铁锂电池以分析强
6、化传热效果。对商用磷酸铁锂电池进行15~35A的放电测试,并根据实验数据对单一电池的温度分布进行了数值模拟。分析和模拟了空气横掠2个和3个电池情况下的冷却效果。实验和模拟的结果表明:在0~30A电流放电的情况下,空气冷却对电池热管理具有积极作用。在放电电流小于30A的情况下时,电池的最大温度低于50℃,但是电池间的温差仍然高于5℃。在放电电流大于30A的情况,仅仅通过空气冷却不能使电池和电池组内温度均匀分布,即不能满足电池散热的需求。关键词:动力电池;锂电池;空气冷却;热管理中图分类号:TM911I
7、ntroductionHowever,temperaturegreatlyaffectstheperformanceand[3][4-5]Withtheincreasingconflictbetweenenergyshortageandlifeofthepowerbatteries.Ramadassal.analysedtheenvironmentalprotection,energysavingisbecomingcapacityfadeofSony18650(1.8Ah)Li-ioncellso
8、ncyclingatmoreandmoreimportant.Fortheautoindustry,lithium-elevatedtemperaturesof45-55℃.Theyelucidatedthatafterionbatterieshavereceivedconsiderableattentionforusein800cycles,thecellslost31%and36%oftheirinitialcapacityelectricvehicles(EV)