The problem of EVA delamination in the production of solar cell modules is a common issue that arises during the manufacturing process. EVA (ethylene-vinyl acetate) is a commonly used material in the lamination process of solar cells, which can provide excellent adhesive properties and protect against moisture and UV radiation. However, while EVA plays a crucial role in the sealing of the module, it can also lead to defects such as delamination in the production process.
The main cause of EVA delamination is the failure of the adhesive layer to properly bond with the encapsulated material such as solar cells, backsheet or cover glass. This can occur due to various reasons, such as inadequate temperature and pressure during lamination, improper EVA thickness or composition, as well as defects in the materials which can cause air bubbles or moisture traps. Another reason for delamination is inadequate storage conditions, which can lead to the degradation of the adhesive properties of the EVA over time.
The consequences of EVA delamination can be severe for the performance of the solar module. It may cause an increase in the module temperature, reducing the efficiency and lifespan of the solar cells. Additionally, it can create a hazard of electrical shock and fire in case of moisture ingress. Therefore, it is essential to maintain strict quality control measures during the production process to avoid EVA delamination and ensure the production of reliable and efficient solar cell modules.
