What are the structural components of solar panels?
Its function is to protect the main body of power generation (such as battery), and the selection of light transmission is required. 1 The light transmittance must be high (generally more than 91%); 2. ultra white steel treatment
2) EVA
It is used to bond and fix tempered glass and power generation main body (such as battery). The quality of transparent EVA material directly affects the service life of components. EVA exposed to the air is easy to age and turn yellow, thus affecting the light transmittance of components and power generation quality of components. In addition to the quality of EVA itself, the lamination process of component manufacturers also has a great impact. For example, the bonding degree of EVA is not up to standard, and the bonding strength between EVA and tempered glass and backplane is not enough, Will cause early aging of EVA and affect the service life of components.
3) Battery slice
The main role is to generate electricity. The mainstream in the main power generation market are crystalline silicon solar cells and thin-film solar cells, both of which have their own advantages and disadvantages. Crystalline silicon solar cells have relatively low equipment cost, but high consumption and cell cost, but also high photoelectric conversion efficiency. It is suitable to generate electricity in outdoor sunlight; Thin film solar cells have relatively high equipment costs, but their consumption and battery costs are very low. However, their photoelectric conversion efficiency is more than half that of crystalline silicon cells, but their weak light effect is very good. They can also generate electricity under ordinary lights, such as the solar cells on calculators.
As above, it is mainly used to bond and package the power generation body and backplane
4)EVA
5) Backplane
Function, sealing, insulation and waterproof (generally, TPT, TPE and other materials must be aging resistant. Most component manufacturers have a 25 year warranty. Tempered glass and aluminum alloy are generally OK. The key is whether they can meet the requirements with the backplane and silica gel.)
6) Aluminum alloy
Protect the laminated parts and play a certain role of sealing and supporting
7) Junction box
Protect the whole power generation system and play the role of current transfer station. If the module is short circuited, the junction box will automatically disconnect the short-circuit battery string to prevent burning the whole system. The most important thing in the junction box is the selection of diodes. According to the type of battery in the module, the corresponding diodes are also different
8) Silica gel
The sealing function is used to seal the junction between components and aluminum alloy frame, components and junction box. Some companies use double-sided tape and foam to replace silica gel. Silica gel is widely used in China. The process is simple, convenient, easy to operate, and the cost is very low.