BYBYV.LALITHA DIVYAK.PRATHYUSHAS.H.RESHMADEPARTMENT OF MECHANICAL ENGINEERINGGOKARAJU RANGARAJU INSTITUTE OF ENGINEERING AND TECHNOLOGY Certain modules are selected and worked out to suitable specifications. The development of solar charger goes from the fundamental level like soldering lamination and making the panel etc. The developed charger is planned for 6 Volts with ma capacity at bright sunlight and step down to 5Volts using regulator. In the report, the detailed experimental characteristics of mobile charger are noted. The term "photovoltaic" comes from the Greek (photo) meaning "light", and "voltaic", meaning electric, from the name of the Italian physicist VOLTA after whom a unit of electro-motive force, the volt is named. The term "photo-voltaic" has been in use in English since 1849. The sun is a star made up of hydrogen and helium gas and it radiates an enormous amount of energy every second and it is clean. Solar cell works on the principle of photovoltaic effect. Sunlight is composed of photons, or "packets" of energy. These photons contain various amounts of energy corresponding to the different wavelengths of light. When photons strike a solar cell, they may be reflected or absorbed, or they may pass right through. When a photon is absorbed, the energy of the photon is transferred to an electron in an atom of the cell (which is actually a semiconductor). With its new found energy, the electron is able to escape from its normal position associated with that atom to become part of the current in an electrical circuit. Raw Materials: The basic component of a solar cell is pure silicon, which is not pure in its natural state Purifying the silicon Making single crystal silicon Making silicon wafers Doping The anti-reflective coating Encapsulating the cellMULTICRYSTALLINE SOLAR CELLNEGATIVEPOSITIVEMECHANICAL SPECIFICATIONProduct Multicrystalline cellFormat 156 mm 156 mm 0.5 mmDiameter: 220 0.5 mmAverage thickness (Si) 160 m 30 m/ 180 m 30 m/ 200 m 30 mFront contacts () Three 1.5 mm wide bus bars (silver)Alkaline texturizedsurfaceDark blue anti-reflecting coating (silicon nitride)Back contacts (+) Three 3 mm wide bus bars (silver / aluminum)Aluminumbackside metallization For low-power portable electronics, like calculators or small fans, a photovoltaic array may be a reasonable energy source rather than a battery. In other situations, such as solar battery chargers, watches, and flashlights, the photovoltaic array is used to generate electricity that is then stored in batteries for use later.FLOW CHART Solar Cell Manufacturing Solar cell Soldering machine.Komex 1 Pick &Place Robot 1Panel layout EVA &Glass Semi Automatic Bus Bay soldering Manual Manual layout Lamination thermal & vacuumPanel Testing Pick & Place Robo Panel layout EVA &Glass Pick &Place Robot 2Solar cell Soldering machine.Komex 2 Bus Bay soldering Lamination thermal & vacuumBus Bay soldering Lamination thermal & vacuumPANEL ASSEMBLY PANEL ASSEMBLY Panel cell side frame fix Pressing machine Manual Distribution box fixing Soldering Fork lift Packing Loading in trucks Gate out Portable Solar Mobile Charger for mobile phone can be charged with Sun light, and electrical power. It stores power from the sun and lets you charge mobile phone, iPod, etc at your convenience. Uses high-efficiency monocrystalline silicon Solar panel: 5.5V/1000mA Output voltage: 5.5V Output current: 300-550 mA Time taken to charge mobile phone using the charger: about 60 for typical mobile A multicrystalline solar cell is taken and its cut into 12 parts. By taking tabbing wire and applying flux, paste soldering is done on the bus bars. This is done from top of one cell to bottom of the other cell. They are connected in series. The above process is continued for remaining cells. A wire comes from positive side of cell and another wire comes from the negative side. The whole arrangement is then placed on top of an acrylic sheet, Teflon, EVA. On top these panels EVA is again placed and are attached with a feviquick. Thee wires are connected to the terminals of a regulator. Using multimeter we verify the voltage is brought down to 5 V. Regular terminals are further connected to multipincable. The pin is then connected to mobile to charge it.S.NO LIGHTANDHEATSOURCELIGHTINTENSITYHEAT/TEMPNUMBEROF CELLSAREAOF CELLSERIES/PARELLELCONNECTIONVOLTAGE CURRENT POWER1 SUNLIGHTNOON OPENSPACE1234567891011SERIES0.551.101.652.202.783.343.874.424.945.146.061 0.551.101.652.202.783.343.874.424.945.146.06Type:RH-105Make : NokiaModel: 1208Voltage: Max-5VMin-3.7VCapacity: 1020ma/hr Make: Samsung Model: GT-B5310 Voltage:Max-5V Min-3.7V Capacity:930ma/hr In solar mobile charger ripples will not be there as we use DC power directly to charge the mobile. Battery life is more as high voltages are not developed. Versatility of Solar mobile charger is high. Lifeofthebatterywillbehighasweusesolarmobile charger. Adaptability is high.Solar semiconductor Industry visit

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