💡解答1.Afuelcellisanelectrochemicalenergyconversiondevice.Thefuelcellconvertsthechemicalsubstanceshydrogenandoxygenintowaterandgenerateselectricalenergyinthisprocess.Fuelcellsarepoweredbypurehydrogen,buthydrogenisverydifficulttostoreanddistribute.Methanolisaliquidfuelanditspropertiesaresimilartothoseofgasoline.Itisalsoeasytotransportanddistribute,somethanolmaybeapotentialchoiceforfuel-cellvehicles.2.Batteries,batterymodulesandbatterypacksarethecorephysicalcomponentsofPEV(Plug-inElectricVehicle)batteries.Asinglecellisthesmallestbatterythatcontainselectrodes,separators(diaphragms)andelectrolytes.Theoutputvoltageofatypicalsinglecellisbetween1and6volts.Abatterymoduleconsistsofmultiplesinglecells,andthesesinglecellsareusuallyconnectedinseriesorinparallel.Similarly,abatterypackconsistsofseveralbatterymoduleslocatedinasinglelocation.