How Can Bubble Formation, Delamination, and Adhesion Issues in PV Cells Be Prevented?

Lamination is the most critical stage in the production of photovoltaic (PV) cells, directly affecting quality. In PV modules, it is essential that the glass, EVA, solar cells, and backsheet or glass-glass layers are firmly bonded together. Consequently, ensuring the cells are long-lasting and high-performing is of paramount importance.

If vacuum, temperature, and pressure values are not properly managed during the lamination process, bubbles may form inside the module, and delamination and adhesion issues may occur. These problems reduce production quality. Furthermore, these issues can negatively impact the cells’ field performance, durability, and service life.

For this reason, using a high-quality PV lamination machine is one of the fundamental requirements for quality in solar cell production. The BallastCo Mini Lamination Machine, model BL-PVL-480, is precisely why it should be chosen. In this article, we will explore how issues such as bubbles, delamination, and adhesion problems arise and how they can be prevented. 

 

Bubble formation occurs when air pockets remain between the layers of photovoltaic (PV) cells (glass, EVA, solar cells, and backsheet) during lamination. These air pockets are typically caused by insufficient vacuum, incorrect temperature settings, the use of unsuitable EVA, or improper process duration.

Bubbles forming inside a PV module can affect both the visual quality and technical performance of the photovoltaic (PV) cells. Over time, moisture accumulation, poor adhesion, or the risk of damage around the cells may arise in these areas. To prevent bubble formation, the PV cell layers must be clean prior to lamination, the correct vacuum level must be maintained, and the EVA curing process must be carefully controlled.

 

Delamination is the separation of the layers in a PV module over time. This issue typically arises due to insufficient adhesion, poor lamination quality, or incorrect process parameters. Solar PV cells are used outdoors for many years. Outdoor environmental conditions such as temperature fluctuations, humidity, UV radiation, and mechanical stress can cause damage to the cell structure over time. Therefore, if the lamination process is not performed correctly, these external factors can eventually cause the cell layers to separate.

Consequently, when delamination occurs, the electrical performance of photovoltaic cells decreases, moisture ingress increases, and the module’s service life is shortened. For this reason, proper control of temperature, pressure, and vacuum must be ensured during the production process.

The quality of adhesion in PV modules depends on the proper curing of the EVA and the bonding of the layers under uniform pressure. Insufficient temperature, a short process duration, or uneven pressure distribution can prevent the layers from bonding to the desired extent.

To prevent adhesion issues, the following criteria must be followed:

These steps help create a stronger module structure and reduce long-term quality issues.

To prevent issues such as bubbles, delamination, and adhesion in PV modules, every stage of the production process must be carefully managed. One of the most effective ways to prevent bubbles, delamination, and adhesion issues in PV modules is to use a lamination machine with precise control features. This is because even small temperature variations, insufficient vacuum, or uneven pressure distribution during the lamination process can cause serious quality issues in the final product.

The BallastCo PV Laboratory-Grade Laminating Machine is an industrial solution developed to precisely control vacuum, temperature, and pressure parameters in solar cell production. With its high vacuum performance, precise temperature control, powerful pressure application, and automation features, it helps achieve more consistent results in the production process.

With its industrial design capable of adapting to various PV module structures, the BallastCo PV Laboratory-Grade Laminating Machine offers an efficient solution for solar cell manufacturers. Its structure, suitable for both glass-backsheet and glass-glass module production, provides flexibility on the production line.

This Small Laminating Machine features an automatic cover system, precise temperature control, high vacuum performance, and is customizable. With the BallastCo laboratory-type laminating machine, manufacturers can create more controlled production processes for different PV cell sizes thanks to various area options. All these features provide significant advantages, particularly for PV module manufacturers aiming for high-quality standards.

In conclusion, the BallastCo Mini Laminating Machine is a strong investment option for companies seeking to produce higher-quality, more durable, and more reliable modules in solar cell manufacturing. In other words, the BallastCo BL-PVL-480 PV Laminating Machine is an excellent choice for reducing issues such as bubbles, delamination, and adhesion in your solar cell production line, and for establishing a more controlled and efficient lamination process.  

1) Why do bubbles form in PV modules?

They are typically caused by insufficient vacuum, incorrect temperature settings, or air trapped between layers.

2) What is delamination?

It is the separation of PV module layers over time.

3) How can adhesion issues be prevented?

They can be prevented by using the correct temperature, sufficient pressure, stable vacuum, and appropriate EVA.

4) Does the lamination machine affect quality?

Yes. Precise vacuum, temperature, and pressure control directly affect the quality of photovoltaic (PV) cells.

5) What advantages does the BallastCo Lamination Machine offer?

Due to its laboratory-type design, it offers space-saving benefits. It provides high vacuum performance, precise temperature control, a PLC system, and compatibility with various module structures.

6) What is the price range for the BallastCo Mini PV Laminating Machine?

The prices for BallastCo Mini PV laminating machines generally range from 5,000 to 10,000 USD.