Solar panel battery charger

Published:2013/3/18 20:52:00 Author:Ecco | Keyword: Solar panel, battery charger | From:SeekIC

The solarbattery chargercircuit isnothing but adualcomparatorthat connects thesolar panelto the batterywhen thevoltage atthelatter terminalis lowand disconnected ifexceeding a certain threshold. Since itisonlybymeasuring thebattery voltage,it is especially intendedfor lead batteries, aelectrolyteliquid or gelled, thatadaptthebestofthisway. The battery voltageseparatedbyR3before being fedtothe two comparatorsinIC2, When itis belowthe thresholddetermined bytheoutputofP2, IC2Bgoes highwhichalsocausesthe output ofIC2Chigh. T1saturationandrelayRL1on, allowingthe solarpaneltorechargingthe batteryvia theD3. When thebattery voltageexceedsthe threshold set byP1, When thebattery voltageexceedsthe threshold set byP1,the outputICAgoeslowas well asIC-C…and thereforecauses therelayoff,thus avoidingoverloadingwhen chargingthe battery. In orderthe thresholddeterminedby theP1andP2arestable,they aresuppliedwithan integratedregulatorIC, closelyseparatedfrom thevoltageofthe solarpanelthroughD2andC4.



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