Because the single solar cell itself is easily broken and easy to be corroded, if it is directly exposed to the atmosphere, the photoelectric conversion efficiency will fall due to the influence of moisture, dust, acid rain, etc., resulting in damage and failure. Therefore, solar cells must generally be packaged into a flat structure by means of glue sealing and lamination before being put into use. Solar cell module requirements:
① There is a certain nominal working current output power.
(2) Long working life, requires that the component can work normally for 20 to 30 years, so the materials, parts and structures used in the component are required to be consistent with each other in the service life to avoid the failure of the whole component due to a damage.
(3) have sufficient mechanical strength to withstand the conflict, vibration and other stresses occurred in the process of transportation, installation and use.
④ the electrical performance loss caused by the combination is small and the combination cost is low.