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CHARGING LEAD ACID BATTERY USING SOLAR ENERGY. B.Ashok raj singh (cs12b1009) Musham Ranadheer(cs12b1026 ) L.Sunil Pratap(ch12b1014) D.Prashanth (cs12b1014 ). Circuit for charging battery using solar panel . Basic Idea and Circuit description.
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CHARGING LEAD ACID BATTERY USING SOLAR ENERGY B.Ashok raj singh(cs12b1009) Musham Ranadheer(cs12b1026) L.SunilPratap(ch12b1014) D.Prashanth(cs12b1014)
Basic Idea and Circuit description • The basic Idea of the project is to utilize the solar energy . • The circuit basically consists of a solar panel(to absorb the solar radiation), capacitors, resistors, transistors, integrated circuit(IC).
ROLE OF EACH COMPONENT • IC LM317 provides the correct charging voltage for the battery. It is a voltage regulator. • Battery must be charged with 1/10 its Ah value . The charging circuit is designed based on this fact. • Charging current for the battery is controlled by Q1(BC 548),R1,R4 and R5. • Q1 acts like a policeman at a signal and controls the flow of current. • R1,R4 and R5 are manipulated taking into account the internal resistance changes of the circuit.
ROLE OF EACH COMPONENT(Contd.) • Potentiometer R5 can be used to set the charging current. • R5 should be set in such a way that when 18.6V is given by the voltage regulator, 14.6V appears across the battery terminals. • As the battery gets charged the current through R1 increases. • C1 acts as filter capacitor. • The noise is reduced by C2.
SPECIFICATIONS OF THE SOLAR PANEL • Two solar panels of rating 12V ,3W are connected in parallel and used. • The parallel connection helps give out a much higher current than normally obtained from a single panel. • For optimum usage, the following is recommended: • Solar Panel Angle Calculation(for northern hemisphere, point the panels south) • SEASONANGLE/TILT CALCULATION • Winter (Latitude*0.9)+29 degrees • Summer (Latitude*0.9)-23.5 degrees • Spring & Fall Latitude-2.5 degrees