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Jared Falls-Bahram Emami
Lead-Acid Battery Jared Falls-Bahram Emami
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Lead-Acid Battery Lead Oxide
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Discharging electrons release from the negative electrode
pass through the load reaction with positive electrode start electrolyte deposit sulfate ions onto both of electrodes Lead sulfate which is an electrical insulation cover the electrodes
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Charging voltage of the battery increases resistance decreases
supplied current dictates reverse reaction lead sulfate removes from electrodes/return to the electrolyte
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Shallow Lead-Acid Battery
Thin electrode Very low resistance High power density completely discharge lead sulfate fills the space does not allow the current flow
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Deep Discharge Battery
Thicker Electrodes Distance between electrodes Debris area
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more inactive material
Power Vs Energy Thicker electrodes more active material higher resistance Thinner electrodes more inactive material lower resistance
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Construction and Components
Main Components: Cover Insulation Plates One negative, one positive Electrolyte Allows for ion transfer between electrodes Separators Separates two electrodes
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Construction and Components
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Construction and Components
Top Cover: made of wood, hard-rubber, ceramics, molded plastic Top cover has 3 holes One at each end for the posts, one in the middle for the vent plug Middle hole involves flow of electrolyte Bottom Floor: 4 ribs on the bottom floor 2 for the positive plate, 2 for the negative plate “Prism” serves as a support for plates Protects against short circuits
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Manufacturing Processes
Plante Plates Two sheets of lead immersed in H2SO4 Electrolysis produces H and O Faure Plates Active material mechanically applied to plates “Red Lead” (Pb3O4 ) hardens on plate, sulfuric acid is applied, forming H and O
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Manufacturing Processes
Plante Plate Faure Plate
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SWOT Analysis
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Conclusions Lead-acid batteries are cheap and simple to manufacture
Commonly used in PV systems Main chemical reaction involves Pb and H2SO4 Reliable/durable and used in many different industries Limit to number of full discharge cycles for lead-acid batteries
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References acid-battery batteries-3229db78a14.html manager/UserFiles/report_batteries_solar_photovoltaic_applications.pdf AA51CCA461EA4?doi= &rep=rep1&type=pdf Lecture: Lead-acid batteries How batteries work Conduction mechanisms Development of voltage at plates Charging, discharging, and state of charge Key equations and models. Eight-Amazing-Engineering-Stories-Using-the-Elements-to-Create- Extraordinary-Technologies[EBFII]. science/papers/batteries/ch3.pdf
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