混合动力车用镍氢电池散热系统研究

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1、上海交通大学硕士学位论文混合动力车用镍氢电池散热系统研究姓名：楼英莺申请学位级别：硕士专业：机械与动力工程指导教师：王文20070201上海交通大学硕士学位论文的热量，但仍能对电池散热起到一定的作用。（4）在可用的空间较大的情况下，可以使用电池数更多的电池组，为此设计了波浪形电池组。波浪形电池组是包括20个长条形模块，总电压为144V的蓄电池单元。其进风处箱体为波浪形结构，以减小流体能耗，且能引导更多的气流参与内部模块散热；上方箱体采用方形结构，强化边缘模块换热。进口气流分成两股，分别冷却进风口右上角和右侧的电池。进口通道沿流动方向逐渐减小，既增加了下游的风压

2、，又保证气流按模块均匀分配。从软件模拟结果看，强制对流条件下，电池的工作温度和温差都能够满足电池散热需要。关键词：混合动力车、电池组、散热、结构设计、优化II上海交通大学硕士学位论文Nickel-MetalHydrideBatterycoolingsystemresearchforHybridElectricVehicleABSTRACTWiththeincreasingattentionofenvironmentprotectionandenergyshortage,HybridElectricVehicle（HEV）hasbeenthemostfeasib

3、lechoice.ManyvehicleenterprisesareinvolvedintheHEVdevelopmentovertheworld.HEVisenslavedtotheperformanceofbatterypack,whichisgreatlyaffectedbytemperature.ThetargetofNickel-MetalhydridebatterycoolingsystemforHEVistomakebatteryworkinitsoptimumtemperaturerange20oooC～40Candlessthan5Ctemp

4、eraturedifference,inordertokeepitsformalperformanceandextenditslife.Themainjobsinthisthesisinclude:(1)ExperimentofsingleNickel-Metalhydridebatterytogetitsthermalcharacterinthechargeanddischargeprocess.Thechargeprocessisexothermal,andbatterytemperatureincreasesgradually.Oxygenevoluti

5、onreactiontakesplaceatthechargeend,sendingoutalotofheat,andmaketemperatureincreasemuchmorequickly.Temperaturevariationinthedischargeprocessisdecidedbythecurrent.Therefore,satisfyingheatmodelishelpfulforbatterypackdesignbysoftwareway.Byexperimentandtheoreticalanalysis,wegotsomenecess

6、aryparametersforsinglebattery,builtthethermalmodel,andprogrammedtosimulationtheheatprocess.Thesimulatedresultscoincidedwellwiththeexperimentdata.(2)Batterypackstructureisenslavedtotheavailablespaceofvehicle.CinquefoilbatterypackofferstightandefficientheatdissipationbatterycellforHEV

7、.Itisconstitutedby5longmodules,whichareincinquefoilshapeasabatterycell,whosetotalvoltageis36V.Usemetallicbearingtomakeuseofitsheatdissipationbyconduction.Electricisolatedthermalgasketisthenlaidbetweenbatteryandbearing.However,becauseofthemachiningcraftIII上海交通大学硕士学位论文shortage,modulec

8、oncentricitycannotb