Solar cell module structure and its influence on the backplane performance requirements
According to the general glass - Film - the battery plate - - TPT film laminated to the aluminum alloy frame. The solar cell module is placed in the outdoor electrical products, so in addition to having protection function back outside, still must have 25 years of reliable insulation property,solar panel
X water resistance, aging resistance performance. Table 1 lists the backplane performance requirements of the list, in these index a measure of solar battery backboard performance is an important index for water vapour permeability. If the solar panel barrier water vapor permeable performance is bad, the moisture in the air ( especially wet moisture more) through the solar energy back into the medial, water vapor will affect the EVA ( ethylene vinyl acetate copolymer ) bonding properties,solar module
cause the backplate and EVA detachment, and then make more direct contact with the battery. Slice to cell oxidation
The United States researchers from Rensselaer Polytechnic Institute in 2008 developed a new type of coating, the coverage of the solar battery board can make the sunlight absorption rate increased to 96.2%, while the ordinary solar cell board sunlight absorption rate of only about 70%.
New coating mainly solves two technical problems, one is to help the solar panels absorb almost all of the solar spectrum, the two is to make the solar panels absorb from the greater angle of light from the sun, thus increasing the solar panels absorb solar efficiency.
Ordinary solar panels usually can only absorb part of the solar spectrum, but usually only in the absorption of the direct sun light,solar cell high work efficiency, thus many solar device are equipped with automatic adjustment system, to ensure that the solar battery board has always been with the sun keep most conducive to absorb the energy perspective