Transcription of Lead Acid Battery Charging Graphs - Scuba Engineer
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Lead Acid Battery Charging Graphs - Scuba Engineer
66 Home Power #36 August / September 1993 BatteriesLead-AcidBattery State ofCharge Perez 1993 Richard PerezAbattery voltmeter is the mostbasic system voltmeters areinexpensive, easy to install, and canprovide a wealth of system informationto renewable energy users, RVers, oranyone who depends on a a Voltmeter?Ten years ago, voltmeters were all we had forinformation about our systems. Ampere-hour metersthat calculated Battery efficiency were a pipe now, small systems cannot justify the additionalexpense and complexity of the new sophisticatedbattery state of charge (SOC) instruments. I still use ahomebrew Battery voltmeter in addition to our hi-techinstruments like the Cruising Amp-hour meter, the SPM2000, and the Power Monitor 15. The voltmeter isalways there, consumes virtually no power, and tells meat a glance what s happening with our a Battery voltmeter and turning that informationinto a reliable assessment of the Battery s state ofcharge is like tracking an animal by its requires noticing small details andextrapolating information from these details.
This characteristic gives the lead-acid reaction its particular shape or signature on the voltage vs. SOC graphs. This signature is unique — very different from alkaline cells whose electrolyte resistance remains constant regardless of SOC. The shape of the lead-acid curves makes it possible to use a voltmeter to determine a battery’s state ...
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