Since the single solar cell itself is fragile and easily corroded, if it is directly exposed to the atmosphere, the photoelectric conversion efficiency will decrease due to the influence of humidity, dust, acid rain, etc., resulting in damage and failure. Therefore, solar cells generally must be packaged into a flat-panel structure through glue sealing, lamination, etc. before being put into use. Solar cell module requirements:

① There is a certain nominal working current output power.
②The working life is long, and the components are required to work normally for 20 to 30 years. Therefore, the materials, components and structures used in the components are required to be consistent with each other in terms of service life, so as to avoid the failure of the entire component due to one damage.
③ It has sufficient mechanical strength to withstand the conflicts, vibrations and other stresses that occur during transportation, installation and use.
④ The electrical performance loss caused by the combination is small, and the combination cost is low.