Solar CellsWhat is the main material of the board? It is mainly composed of the following components.
(1) Tempered glass has the function of protecting the power generation body (such as batteries), and has certain requirements for the light transmittance: 1. The light transmittance must be high (generally above 91%); 2. Ultra-white tempered treatment
(2) EVA is used to bond and fix tempered glass and power generation bodies (such as batteries). The quality of transparent EVA material directly affects the life of the component. EVA exposed to the air is prone to aging and yellowing, which affects the light transmittance of the component. Therefore, in addition to the quality of the EVA itself, the bonding process of the component manufacturer is also very important. If the adhesion of EVA does not meet the standard, the bonding strength between EVA and tempered glass and backplane is not enough, it will cause early aging of EVA and affect the life of the component.
(3) The main function of the battery is to generate electricity. The mainstream of the current power generation market is 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 costs, but the consumption and battery costs are very high, but the photoelectric conversion efficiency is also very high, which is more suitable for generating electricity outdoors in the sun; thin-film solar cells have relatively high equipment costs, but the consumption and battery costs are very low, but the photoelectric conversion efficiency is more than half higher than that of crystalline silicon cells, but the weak light effect is very good, and they can also generate electricity in ordinary light, such as the solar cells on calculators.
(4) The function of EVA is the same as above, mainly bonding and encapsulating the generator and the backplane
(5) The function of the back panel is sealing, insulation, and waterproofing (usually made of materials such as TPT and TPE, which must be resistant to aging. Most component manufacturers have a 25-year warranty period. Tempered glass and aluminum are generally fine. The key is whether the back panel and silicone can meet the requirements.)
(6) Aluminum alloy protective layer plate plays a certain role in sealing and supporting
(7) The junction box protects the entire power generation system and acts as a current conversion station. If a component short-circuits, the junction box automatically disconnects the short-circuited battery string to prevent the entire system from burning out. The most critical part of the junction box is the selection of diodes. Depending on the type of battery in the module, the corresponding diodes are also different.
(8) Silicone sealing is used to seal the connection between the component and the aluminum alloy frame, and between the component and the junction box. Some companies use double-sided tape and foam to replace silicone. Domestic use of silicone is simple, convenient, easy to operate, and low cost.
Photovoltaic welding ribbon manufacturerRAYTRONWe produce a wide variety ofSolar PhotovoltaicThe welding strips are completely customized according to the customer's requirements to meet their various needs.
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