A photovoltaic component is a minimally inseparable photovoltaic cell combination that has a package and an internal connection that can provide a DC output separately.
1. Battery chip. The main role is to generate electricity. The mainstream of the main power generation market is crystalline silicon solar cells and thin film solar cells. Both have superior and inferior crystalline silicon solar cells. The equipment cost is relatively low, but the cost of consumption and cell is high. However, the photoelectric conversion efficiency is also high. It is more suitable for thin-film solar cells in outdoor sunlight. The relative equipment cost is high, but the consumption and battery cost are very low, but the photoelectric conversion efficiency is more than half of that of crystalline silicon cells, but the weak light effect is very Well, it can also generate electricity under ordinary lighting, such as solar cells on a calculator.z profile
2. Backboard. Function, sealed, insulated, waterproof. Generally, materials such as TPT and TPE must be resistant to aging. Most component manufacturers are guaranteed for 25 years. Tempered glass and aluminum alloys are generally no problem. The key is whether the backsheet and silica gel can meet the requirements.
3. Tempered glass. Its role is to protect the main body of power generation (such as battery sheets), the choice of light transmission requirements: 1) the light transmittance must be high (generally 91% or more); 2) ultra-white steel treatment.
4. EVA. Used to bond fixed tempered glass and power generation main body (such as battery sheet), the quality of transparent EVA material directly affects the life of the component. EVA exposed to air is prone to aging and yellowing, thus affecting the transmittance of the component and thus affecting In addition to the quality of the EVA itself, the component manufacturer’s lamination process is also very large. If the EVA glue is not up to standard, the adhesion strength of EVA and tempered glass and back sheet will not cause premature aging of EVA. Component life.
5. Silica gel. Sealing function, used to seal components and aluminum alloy frame, components and junction box junctions Some companies use double-sided tape, foam to replace silica gel, silicone is commonly used in China, the process is simple, convenient, easy to operate, and the cost is very low.
6. Aluminum alloy. The laminate is protected to provide a certain sealing and supporting function.
7. Junction box. Protect the entire power generation system and act as a current transfer station. If the short-circuit junction box automatically disconnects the short-circuit battery string, the most critical factor in preventing the burnout of the entire system junction box is the choice of diodes. Depending on the type of battery in the module, The corresponding diodes are also different
As an important part of photovoltaic power station, photovoltaic modules can not be ignored from pre-production to post-operation and maintenance. Each part of its composition is very important, which is related to power generation and safety. The details are king!