Manual for Distributed model

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1、Congratulations,BradleyWigginsTourdeFrance2012/OlympicGamesLondon2012User’sGuideforDistributedModelContents1.ElectrodeBasicDesign2.EquilibriumVoltage3.DischargeDynamics3-1.ButlerVolmerEquation3-2.ShapeofDischargeCurve1.StartPoint2.Slope3.Height4.EndShape4.Conclusions21.Electrode

2、BasicDesign3ElectrodeDesignPositiveLoadingforCellCapacity1.YouneedCellCapacity,C(Ahr)fromcellmanufacturer.totalBasicallycellcapacityisdeterminedwithpositiveloading.2.YouneedActiveAreaS(cm2)fromcellmanufacturer.posActiveAreaheremeansbothsideofPositiveforallstacks/jellyroll.3.Dete

3、rmine“UnitCapacity”C(mAh/cm2)=C/S*1000.p-unittotalposThisisjustforsinglesideunitcapacity.4.TheoreticalcapacityC(mAh/g).theorforpositiveactivematerial.5.“SingleSideLoading”L(mg/cm2)=C/C.posp-unittheor6.Ifyouknow“Utilization”aforthepositive,posyourrightloadingshouldbeL*=L/aposposp

4、os.HereUtilization=aposshouldbe0~1.7.ThisloadingisjustforactivematerialbasedonrequiredLi.Consideringotheradditives,whenthemassfractionofactivematerialisF,thetrueloadingisL**=L*/F.pospospospos4ElectrodeDesign(2)PositiveLoadingforCellCapacity1.Youneedthecapacityratioforpositive/ne

5、gative;“C/A”2.Determinenegativeunitcapacity,C=C/“C/A”n-unitp-unit3.“SingleSideLoading”L(mg/cm2)=C/C.negn-unittheol4.Ifyouknow“Utilization”aforthenegative,negyourrightloadingshouldbeL*=L/anegnegneg.HereUtilization=aposshouldbe0~1.5.Thisloadingisjustforactivematerialbasedonrequire

6、dLi.Consideringotheradditives,whenthemassfractionofactivematerialisF,thetrueloadingisL**=L*/F.pospospospos5ElectrodeDesign(3)Thickness,PorosityandCoatDensityforCellPerformance.PorosityandCoatDensityareautomaticallydeterminedwithLoadingandThickness.2valuesaredeterminedwithother2v

7、alues.CoatDensity(g/cm3)=Loading(g/cm2)/Thickness(cm)RealDensity(g/cm3)=VrActiveMaterial+VrBinder+VrCarbonAidabcHere,V=VolumeFraction,Va+Vb+Vc=1Porosity=1-(CoatDensity)/(RealDensity)CoatDensityRealDensityPorosity62.EquilibriumVoltage8EquilibriumVoltageEquilibriumVoltagevs.

8、xvalue5.0EquilibriumshouldbeplottedLiPoorDISCH