基于单片机的太阳能路灯的铅酸蓄电池的快速充电系统外文文献翻译.doc

基于单片机的太阳能路灯的铅酸蓄电池的快速充电系统外文文献翻译.doc

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原文

Title：

RAPIDCHARGESYSTEMFORLEAD-ACIDBATTERYOFSOLARENERGYSTREETLIGHTBASEDONSINGLE-CHIPMICROCOMPUTER

1.Introduction

Ourcountryisveryrichinsolarenergyresourcesandtheutilizationofsolarenergyheatisoneofthetechnologiesthatareofthehighestcommercialdegreeandthemostuniversalapplicationinnewandrenewableenergyresources.Undertheinitiativeofbuildingsavingsociety,thesolarenergyelectro-opticilluminationisourcountry'srealisticchoiceundertheexistingnationalconditionanditreducestheexpendituresofmunicipaladministrationonstreetlamptoacertainextent.Especiallyinthenewly-builturbanroadsectionandremoteborderdistrictthathasdifficultyinusingelectricity,itisofthestrongestpromotionandistakenseriouslybyFinancedepartment;itishonoredasthe21stcentury'sgreenproject.

2.Thebasictheoryofbatterycharging

Inthemid-1960s,AmericanscientistMashasdonethemassiveexperimentalstudytothecharging-upprocessofringentaccumulatorcell,andproposedacceptablechargingcurvetakenbytheaccumulatorbythelowestgasefficiencyforpremise,thecurvefunctionisi=I0•e−∞.Theexperimentindicatedthatifthechargingcurrentchangesaccordingtothiscurve,itmayreducethedurationofcharginggreatly,andhasnotaffectonbattery'scapacityanditslife,thusithadestablishedresearchdirectiontothemethodofthefastcharging.iscalledthecurvethebestchargepatterninprinciple.

ItMayseethattheinitialchargingcurrentisverybigfromtheMascurve,butweakensveryquickly.Theprimarycauseisthatitcomesintobeingthephenomenonofpolarizationduringtheprocessofcharging.Thephenomenonofpolarizationisreferstothattheinteriorthesealedaccumulatorhasproducedtheoxygenandthehydrogenduringitsprocessofcharging,whentheoxygencannotbeabsorbedpromptly,thenitpilesuponthepositiveplate,enlargethepressureoftheinteriorofbattery,thebattery’stemperaturerises,reducespositiveplate'sareasimultaneously,performancebytheincreaseofinteriorresistance.Thepolarizationcanaffectthespeedandthequalityofcharging,andevenreducethelifeofaccumulator.Therefore,it’simportanttodevelopfastchargesystemofbatterywhoseperformanceisfineandmovementisreliable.ByNotaffectingtheservicelifeofaccumulatorasfaraspossibleforpremise,ithopedthatitcanfillthebatterycapacitysufficientlyadoptingthebiggestchargingcurrentinashorttime,andthebatteryneitherproducestoomuchgasesnorcausestheinteriorhyperpyrexiaduringtheprocess.

3.Solarstreetlightsystem

Inthesolarstreetlightsystem,accumulator’schargingsourceisfromthesolarcell,thechangeofclimateandtheuser'sexcessiveusingelectricityareveryeasytocausetheaccumulatorover-discharge,andthereforethenormalwork'sguaranteerateofthesolarstreetlightislowerthanthesituationofalternatingcurrentbyfar.IftheLead-acidbatteryisinthestateofover-dischargeduringuseprocess,thentheaccumulator'slifewillreducegreatly.Otherwise,iftheaccumulatorcellhasbeenintheuseprocessfloatsthechargeortheshallowdischargecondition,thenaccumulatorcell'sservicelifewilllengthengreatly,evenlengthenonemoretime.Therefore,thefunctionofthecharginganddischargingcontrolsystemisobviousinthestreetlightsystemmerelyreliesonthesolarcellforthebatterycharging,itsperformancehasdecidedaccumulator'sperformance,system'sreliabilityandsystem'scostdirectly.

3.1pulsechargingmethod

Thetheoreticalbaseofpulsefastchargemethodisbysuperimposingcertainfrequency,widthandhighnegativepulseormidwaystopsforashorttimeduringthecharge,makestheleadionparticipatesintheresponseproducePbbydissolvingPbS04andPbO2withenoughtimeandenhancesitsdensity,alsomakestheprocreantH+andHS04-ionputasidewithenoughtimefromthesurfaceofelectrode.Itssyntheticaleffectistoreducethepolarizationoftheaccumulator'sconcentration,permittoenlargethechargingcurrent,reducethechargingtime.

Becausethephenomenonofpolarizationisoftennotobviousduringtheinitialperiodofcharging,itmayadoptbigelectriccurrent0.8~1timeofratedcapacitytocarryontheconstant-currentcharge,makestheaccumulatorchargingattaintothe50%~60%ratedcapacityinashorttime.Stoptochargewhenthesinglestandardvoltageofaccumulatorrisesto2.4V,thewaterstartstodecomposeandmicroairemits（aboutis25milliseconds）.Inordertoeliminatetheelectricchargeaccumulationoftheelectrochemistrypolarizationandthegaswhichformsintheporeofpoleplate,afterstoppingsufficiently,Makingtheaccumulatorthroughonebigcurrentpulsewhosedirectionisoppositetochargebydischargingafterstoppingcharging,the