The method of manufacturing solar panels from disks is as follows:
Refining silicon rods into monocrystalline silicon or polycrystalline silicon; silicon rod slicing and cleaning, i.e. professional processing; like polishing and fluffing, become a solar cell packaged in a solar panel.
Monocrystalline silicon solar cells: The current photoelectric conversion efficiency of monocrystalline silicon solar cells is about 15%, with the highest reaching 24%. This is currently the highest photoelectric conversion efficiency among all types of solar cells. but the production cost is so high that it cannot yet be used widely and generally in large quantities. Since monocrystalline silicon is usually encapsulated in tempered glass and waterproof resin, it is strong and durable, with a long service lifegenerally going up to 15 years and up to 25 years.
Polycrystalline silicon solar cells: The manufacturing process of polycrystalline silicon solar cells is similar to that of monocrystalline silicon solar cells, but the photoelectric conversion efficiency of polycrystalline silicon solar cells is much higher weak. 12% of production In terms of cost, it is cheaper than monocrystalline silicon solar cells, the materials are easy to manufacture, save energy, and the overall production cost is low, so it has been widely developed.
In addition, the lifespan of polycrystalline silicon solar cells is shorter than that of monocrystalline silicon solar cells. In terms of performance-price ratio, monocrystalline silicon solar cells are slightly better. A solar panel is an electricity generation material that uses energysolar energy to convert electrical energy.
How to make solar charging panels for primary school students
First, design the cell size according to the size of the glass in general. , the distance between each side of the cell is 5 mm from the edge of the glass. With the main grid line of the battery as the center, use a cutting machine to cut the solar cells into several pieces. number of glasses. Wear PVB gloves during operation and wait for use after cutting.
Next, use a ruler and wallpaper knife to cut the EVA and backboard into several small pieces slightly larger than the glass. The amount of EVA should be twice that of glass. After cutting the support. by. Next, use scissors to cut the welding tape into several small sections slightly longer than the length of the glasse. Wear PVB gloves when using and set them aside after cutting. After completing the above material preparation work, start using a soldering iron to solder ribbons on the grid main lines on both sides of the battery part. Do not use too much force to avoid crushing the battery part. Place the materials from bottom to top in order glass-EVA-battery sheet-EVA-backplane Once all are laid down, place them in the laminator to avoid misalignment, tape can be used to to stare. Remove the laminated small solar panels, wait for the temperature to drop to room temperature, use a wallpaper knife to remove excess material around the glass, and finally use a soldering iron to connect the independent small solar panels in series, and you can use them. .What is the production process of solar panels ?
Artisanal production of dye-sensitized TiO2 solar cells
1. Making titanium dioxide film
(1) First put titanium dioxide powder into mortar and glue. it Grinding agent
(2) Then use a glass rod to slowly apply a film to the conductive glass
(3) Place the titanium dioxide film under a lamp alcohol to sinter for 10-15 minutes, then let it cool
2.Use natural dyes to color the titanium dioxide
As shown in the picture, add plums fresh or frozen black plums, mountain plums, pomegranate seeds or black tea, add a tablespoon of water and squeeze, then put the titanium dioxide film on it for coloring, it will take about 5 minutes until until the film layer turns dark purple. If the coloring on both sides of the film layer is uneven, you can put it on and tsoak for. another 5 minutes, then rinse it with ethanol and dry it gently with soft paper.
3. Make the electrode positive
The TiO2 colored by a dye is the electrode from which the electrons come out (the negative electrode). The positive electrode may be composed of a conductive surface of conductive glass (covered with a conductive film of SnO2). You can use a simple multimeter to determine which side of the glass is conductive. You can also use your fingers to make a judgment. the conductive surface is rough. As shown in the picture, mark the non-conductive surface with "+", then use a pencil to evenly apply a layer of graphite to the conductive surface.
4. Add electrolyte
Use a solution containing iodide ions as the solar cell electrolyte. It is mainly used to reduce and regenerate dyes. As the picture shows, add simplement one to two drops of electrolyte on the surface of the titanium dioxide film.
5. Assemble the battery
Place the colored titanium dioxide membrane face up on the table, drop one or two drops of electrolyte containing iodine and iodine ions on the membrane, then place it conductive side of the positive electrode presses on the titanium dioxide membrane. Offset the two pieces of glass slightly and use two pliers to clamp the battery. The exposed parts of the two pieces of glass are used to connect the wires. This way your solar cell is ready.
6. Battery Test
Under outdoor sunlight, check if your solar cell can produce current.
Solar panel production process editing: slicing, cleaning, texture preparation, peripheral engraving, PN+ junction removal, upper and lower electrode manufacturing, fabricationof anti-reflective films, sintering and binning tests Wait 10 steps.
The glass is previously coated with a layer of primer to increase the bonding strength between the glass and the EVA. When laying, ensure the relative position of the battery string, glass and other materials, and adjust the distance between batteries to establish a solid foundation for lamination. (Installation level: from bottom to top: tempered glass, EVA, battery cells, EVA, fiberglass, backplane).
User solar power supply:
(1) Small power supply ranging from 10 to 100W, Used for military and civilian life in remote areas without electricity, such as plateaus, islands, pastoral areas, border posts, etc., such as lighting, televisions, radio cassette players, etc. ;
( 2) 3-5 kW domestic rooftop grid-connected power generation system;< /p>
(3) Photovoltaic Water Pump: Solves the problem of drinking water and irrigation from deep wells in areas without electricity.
Transportation field: such as navigation beacon lights, road/railroad signal lights, warning/signal lights, Yuxiang street lights, high altitude obstacle lights, highway/railway wireless telephone booths, unattended route changing power supply, etc.