Portable light, when you hear this term you will probably think it’s about a flash light or something. But it’s a new invention to capture the sun’s rays by day and release them by night as useful light. It can be used wherever it’s needed. It’s a bag with solar cells with light-emitting diodes attached.
The bag can be carried around during daylight hours. In sunlight, the cells generate electricity that is stored in batteries. The solar cells themselves are made from a substance called copper indium gallium diselenide. Even though this is not quite as good at capturing sunlight as silicon, the material from which solar cells are usually made, but it’s less rigid and easier to work with. A working cell can be made by spreading a thin layer of the stuff on another material, such as a sheet of plastic. This results in a flexible and robust plastic bag.
The electricity that is generated by the solar cells is captured in rechargeable lithium-ion batteries. They can store more energy per unit weight than other types, and do not lose their charge too rapidly if they go unused for long periods.
The bag can be carried around during daylight hours. In sunlight, the cells generate electricity that is stored in batteries. The solar cells themselves are made from a substance called copper indium gallium diselenide. Even though this is not quite as good at capturing sunlight as silicon, the material from which solar cells are usually made, but it’s less rigid and easier to work with. A working cell can be made by spreading a thin layer of the stuff on another material, such as a sheet of plastic. This results in a flexible and robust plastic bag.
The electricity that is generated by the solar cells is captured in rechargeable lithium-ion batteries. They can store more energy per unit weight than other types, and do not lose their charge too rapidly if they go unused for long periods.
But when the bag is carried around parts of it will be in the shade while others are overwhelmed with sunlight. So the engineers devised a way to direct the energy where it is most needed together with a device that can stash away enough electricity to power the light-emitting diodes for ten hours after three hours in full sunlight.
1 opmerking:
Thats another great invention to me. Nice to see that people working to create more little creative energyproducts as well, such as this 'sunshinelamp'.
Always to have a good light in the dark ! ;)
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