Polycrystalline Solar Cells are devices that convert solar radiant energy directly or indirectly into electricity by absorbing sunlight, the main material of most Polycrystalline Solar Cells is "silicon", but the cost of production is so large that it cannot be widely and universally used. Solar cells are more energy-efficient and environmentally friendly compared to ordinary batteries and rechargeable batteries.
1 tempered glass Its role is to protect the main power generation (such as battery chip), light transmission of its selection is required, 1. transmittance must be high (generally 91% or more); 2. Ultra-Stainless treatment
2 Eva is used to bond fixed tempered glass and power generation main body (such as battery chip), the quality of transparent EVA material directly affect the life of components, the exposure of EVA in the air is easy to aging yellowing, thus affecting the light transmittance of components, which affect the quality of the components in addition to EVA itself, Component manufacturers of the lamination process is also very large, such as Eva Adhesive not meet the standard, Eva and toughened glass, backplane bonding strength is not enough,Polycrystalline Solar Cells will cause EVA premature aging, affecting the component life.
3 The main role of the battery is power generation, power generation main market is crystalline silicon solar cells, thin film solar cells, both have advantages and disadvantages. Crystalline silicon solar cell, equipment cost is relatively low, but the consumption and the cost of the battery is very high, but the photoelectric conversion efficiency is also high, in the outdoor sun to generate electricity is more suitable; thin film solar cells,Polycrystalline Solar Cells relatively high cost of equipment, but the cost of consumption and battery is very low, but the photoelectric conversion efficiency relative to the crystalline silicon cell chip more than half can also generate electricity in ordinary light, such as a solar cell on a calculator.
4 Eva function as above, main bonding package power generation main body and back plate
5 Back plate role, sealing, insulation, waterproof (generally with tpt, TPE and other materials must be anti-aging, most components manufacturers are quality assurance 25, tempered glass, aluminum alloy generally no problem, the key is in with the backplane and silica gel can meet the requirements. ）
6. Aluminum alloy protective layer pressure parts, a certain seal, supporting role
7 junction box to protect the entire power generation system, play the role of the current relay, if the Assembly short-circuit junction box automatically disconnect short-circuit battery string, to prevent burnout of the entire system. The key to the junction box is the selection of diodes, depending on the type of cell in the module, the corresponding diode is also different
8 Silicone sealing function, used to seal the assembly and aluminum alloy frame, assembly and junction box. Some companies use double-sided tape, foam to replace silica gel, the domestic common use of silica gel, process simple, convenient, easy to operate, and low cost.