铝电解电容的应用

TantalumElectrolyticCapacitor钽电解电容上海聚电实业有限公司EnvironmentalProgram/SupplierPresentation—2Allrightsreserved©2002,JodoShanghaiJodoCo.,Ltd.上海聚电实业有限公司ApplicationsofAluminumElectrolyticCapacitorsRobotSwitchingPowerSupplyInvertersInverterforTrainPhotoFlashS.P.S.forPersonalComputerApplicationDiagram[FunctionsatinitialstageofSWpowersupply]ACVoltageTrancemission-waverectificationformrectificationformSwitchingCircuitInputsmoothingcircuitOutputsmoothingcircuitFuseOutputACInputDCVoltageApplicationDiagram[FunctionsatsecondstageofSWpowersupply]rectificationformDCVoltageWaveformafterswitchingSwitchingcircuitInputsmoothingcircuitOutputsmoothingcircuitFuseOutputACInputSwitchingConstructionofAluminumElectrolyticCapacitorsElementCaseElectrolyticPaperCathodeFoilAnodeFoilTerminalLeadInsulationcapBasicStructureDielectricdC=•S/d•oCathodeFoilAnodeFoilElectrolyteAluminumOxideLayerrProportionaldielectricconstantoDielectricconstantinavacuumdDistancebetweenelectrodesSElectrodeareaElectrolyticPaperManufacturingprocess3.Slitting2.Anodization1.Etching4.Winding5.Impregnation7.Aging11.Packagingshipment10.Finalinspection9.Piecebypiececheckpaper6.Assembling8.CoveringMaterialFactoryHagaFactory(assembly)ProductionofAnodeFoilsAnodizingmachineExpandingasurfaceareabyetchingOxidizealuminum(Al2O3)isformedbyanodization.500mmOriginalFoilEtchedFoilAnodizedFoil100µmBasicoxidelayer5~10ÅEtchingOriginalfoilBasicoxidelayerremovedPitformationPitexpansionPre-conditioningEtchingbyDCChemicaletchingProcesstoexpandasurfaceareaofProcesstoexpandasurfaceareaofaluminumfoil.aluminumfoil.HighpurifiedaluminumfoilsTakingawayBasicoxidelayerElectricaltreatment.TreatmentbyaqueouschloridesolutionsThus.about50to100timessurfaceareaforlowvoltagetype,about10about50to100timessurfaceareaforlowvoltagetype,about10toto40timesforhighvoltagetype.40timesforhighvoltagetype.0.10.1mmmmAnodizationProcesstoformthedielectricformation(AProcesstoformthedielectricformation(All22OO33..Etchedfoilsareputintoammoniumborateliquid.Loadingthevoltagecontinuouslyataround100to200%ratedvoltage.AluminumAluminumLowvoltageLowvoltage(spongetype)(spongetype)HighvoltageHighvoltage(pittype)(pittype)AluminumAluminumAAll22OO33AluminumAluminum14Å/V×500V=7000Å=0.7µmMiddlevoltageMiddlevoltage(pittype)(pittype)1µm2µmPictureofAnodefoilbyS.E.M.CrosssectionSurface4001000100µmAlPitAl2O3300000.3µmPictureofAnodeoxidefilmbyS.E.M.300000.3µm500000.3µmAl2O3•nH2OAlPitAl2O3AlPitAl2O3PictureofAnodefoilbyS.E.M.400400100µmPaperfordoubleanodeforsingleanodeElectrolyteSlittingSlittingmachineAluminumfoilsandseparatorpapersarecut,accordingtothecapacitorelementdesigns.ElectrolyticpaperAnodefoilIronpotforimpregnationElectrolyteCathodefoilImpregnationProcesstosoaktheelementwithelectrolyte.Assembly(1)AftermakingholesonleadInsulationcapareconnectedtolead.AssemblymachineAssembly(2)Theelementisputintoaluminumcase.Thebrimofcaseiscurledtoseal.SealingmachineAgingAgingmachineProcesstorepairtheformationdamagedbycuttingfoilandwindingfoil.AnodefoilPaperCapacitorelementWindingmachineLeadCathodefoilWinding•Electrolyticpapersareinsertedbetweenanodefoilsandcathodefoils.•Theyarewoundinacylindricalshape.•Aluminumleadareconnectedtotheelement.SleevingProcesstoprinttheproductname,itemcodeandlotnumberonthecover.AutomaticsleevingmachinePiecebypieceinspectionOutlookofcheckerAutomaticcheckerElectricalcharacteristicandappearancesareexaminedpiecebypiece.AutomaticpackagingmachinePackaging•Theproductsarepackaged.•Appearancesareexamined.FinalinspectionSamplinginspectionbeforeshipmentSizecheckCharacteristiccheckAppearancecheckShipmentFinishedproductsreadyforshipment.