After cutting the solar cells into small pieces, the working voltage of each piece is about 0.48 volts, which is a fixed value no matter how small it is.
The Operating current of each part is determined by the cell number. Determined by the area, the current per square centimeter is about 18 mA, that is, the larger the area of the battery sheet, the higher the current.
After the cut small battery sheets are assembled into components, the output voltage of the component is determined by each sheet, the voltages are added together, that is, the number of batteries reduces the temperature loss.
2. Reduce loss of occlusion.
3. Improve packaging efficiency.
Since the voltage of a crystalline silicon solar cell has nothing to do with the surface area, but the power is directly proportional to the surface area, relative tothe whole cell, the half-cell voltage remains unchanged. , the power is reduced by half and the current is reduced by half.
In order to ensure that the overall output voltage and current are consistent with conventional components, half-cell battery modules generally adopt a series-parallel structure design, which is equivalent to two small components connected in parallel.
As for packaging technology, half-cell components are the same as conventional components and are packaged with tempered glass, EVA and backsheets. The junction box will be different and a three-piece junction box is generally used.
In terms of technology, the half-cut module process is simple to change. Since the number of cells is doubled, the time for series welding of cells will also be doubled. The difficulty is that the common thread. of the omnibus bandis conducted from the middle of the rear of the module, and the automation of busbar strip welding has also promoted the development of this half-cell module to a certain extent.
It's not sweet. Sunpower cells are monocrystalline silicon cells with the highest conversion rate in the world, developed by the American company Sunpower. The conversion rate of a single chip can reach more than 21%. The battery sheet can be bent 30 degrees and is not easy to break. The electrodes are welded on the back, and the front is smooth and has no color difference. The small components of the Sunpower solar patch are beautiful and very efficient. It is available from Made Energy.