Single Crystal Silicon Photovoltaic Foldable Charging Board

Welcome to TuFang's Garden and Outdoor Product SeriesSolar panelsSolar panels are devices that directly or indirectly convert solar radiation energy into electrical energy through photoelectric or photochemical effects by absorbing sunlight. The main material of most solar panels is "silicon", but due to its high production cost, its widespread use still has certain limitations.Compared to ordinary batteries and rechargeable batteries, solar cells are more energy-efficient and environmentally friendly green products.Structural composition1) Tempered glassIts function is to protect the main body of power generation (such as battery cells), and the selection of light transmittance is required. 1. The light transmittance must be high (generally above 91%); 2. Ultra white steel treatment2) EVAUsed to bond and fix tempered glass and power generation components (such as battery cells), the quality of transparent EVA material directly affects the lifespan of the component. EVA exposed to air is prone to aging and yellowing, which affects the transmittance of the component and thus affects the power generation quality of the component. In addition to the quality of the EVA itself, the lamination process of the component manufacturer also has a significant impact. For example, the EVA adhesive strength is not up to standard, and the bonding strength between EVA and tempered glass and back plate is not enough, It can cause premature aging of EVA and affect the lifespan of components.3) Battery cellThe main function is to generate electricity, and the mainstream in the power generation market are crystalline silicon solar cells and thin film solar cells, each with its own advantages and disadvantages. The crystalline silicon solar cell has relatively low equipment cost, but high consumption and cell cost, but also high Solar-cell efficiency, so it is suitable to generate electricity in outdoor sunlight; Thin film solar cells have a relatively high equipment cost, but their consumption and battery cost 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 lighting, such as solar cells on calculators.4) EVAThe function is as above, mainly bonding and encapsulating the power generation main body and back board5) BackboardFunction, sealing, insulation, and waterproofing (TPT, TPE, and other materials are generally used and must be resistant to aging. Most component manufacturers have a 25 year warranty, and tempered glass and aluminum alloy are generally not a problem. The key is whether the back plate and silicone can meet the requirements.)6) Aluminum alloyProtect the laminated parts and provide a certain sealing and supporting effect7) Junction boxProtects the entire power generation system and serves as a current transfer station. If the component is short circuited, the junction box automatically disconnects the short circuit battery string to prevent burning the entire system. The most crucial aspect in the junction box is the selection of diodes, which vary depending on the type of battery cells inside the component8) SiliconeSealing function is used to seal the interface between components and aluminum alloy frames, as well as between components and junction boxes. Some companies use Double-sided tape strips and foam to replace silica . Silica is widely used in China, which is simple, convenient, easy to operate and low cost.