What does a solar photovoltaic module contain?

　　Solar photovoltaic modules generally refer to solar cell modules. As a terminal product of the photovoltaic industry, solar photovoltaic modules use a wide variety of raw materials, and the selection of different materials will directly affect the relevant performance of solar photovoltaic modules. So, what are the main components of photovoltaic module materials?

　　Material composition and function of solar photovoltaic modules

　　The solar photovoltaic module consists of high-efficiency crystalline silicon solar cells, ultra white textured tempered glass, EVA, transparent TPT backplate, and aluminum alloy frame. It has the characteristics of long service life and strong mechanical resistance to external forces. The material composition and function of photovoltaic modules are as follows:

　　1. Tempered glass: Its function is to protect the power generation main body (such as battery cells), and the selection requirements for light transmittance are: 1) The light transmittance must be high (generally above 91%); 2) Ultra white steel treatment.

　　2. EVA: Used to bond and fix tempered glass and power generation components (such as battery cells), it is clear that the quality of EVA raw materials directly affects the lifespan of the components. EVA exposed to air is prone to aging and yellowing, which affects the transmittance of solar photovoltaic modules and the power generation quality of solar photovoltaic modules. In addition to the quality of EVA itself, the lamination process of component manufacturers also has a significant impact, such as unqualified EVA bonding, EVA and tempered glass Insufficient adhesive strength of the backboard can cause premature aging of EVA, affecting the lifespan of solar photovoltaic modules.

　　3. Battery cells: The primary effect is power generation. The mainstream in the power generation market are crystalline silicon solar cells and thin-film solar cells, each with its own advantages and disadvantages. Crystal silicon solar cells have relatively low equipment costs, but high consumption and cell costs, but also high photovoltaic conversion efficiency. Thin film solar cells are more suitable for outdoor sunlight power generation, with relatively high equipment costs but low consumption and battery costs, But the photoelectric conversion power is slightly more than half of that of crystalline silicon cells, but the weak light effect is very good, and it can also generate electricity under general lighting, such as solar cells on calculators.

　　4. Backboard: Effect, sealing, insulation, waterproof. Generally, it is necessary to use TPT, TPE and other raw materials for aging resistance. Most component manufacturers have a 25 year warranty, and tempered glass and aluminum alloys are generally not a problem. The key is whether the backboard and silicone can meet the requirements.

　　5. Aluminum alloy: protects laminated parts and provides a certain sealing and supporting effect.

　　6. Junction box: protects the entire power generation system and serves as a current transfer station. If the solar photovoltaic module short circuit junction box actively disconnects the short circuit battery string to avoid burning out the entire system, the selection of diodes is crucial. Depending on the type of battery cells inside the solar photovoltaic module, the corresponding diodes are also different

　　7. Silicone: sealing effect, used to seal the junction between components and aluminum alloy frames, solar photovoltaic modules and junction boxes. Some companies use double-sided adhesive strips and foam to replace silicone, and silicone is widely used in China. The process is simple, convenient, easy to operate, and the cost is very low.

　　The photovoltaic module information mainly includes the seven parts mentioned above, and each part needs to be carefully treated. Small details have a significant impact.