Structural composition of solar panels
2021-11-17
1) Tempered glass
Its function is to protect the main body of power generation (such as cells), and the selection of light transmission is required. 1. The light transmission rate must be high (generally more than 91%); 2. Ultra-white tempered treatment
2) EVA
Used to bond and fix the tempered glass and the main body of power generation (such as cell). The quality of the transparent EVA material directly affects the life of the module. The EVA exposed to the air is easy to age and yellow, which affects the light transmittance of the module, thereby affecting In addition to the quality of EVA itself, the power generation quality of the module is also very affected by the lamination process of the module manufacturer. Component life.
3) Cells
The main function is to generate electricity. The mainstream in the main power generation market is crystalline silicon solar cells and thin-film solar cells, both of which have their own advantages and disadvantages. Crystal silicon solar cells have relatively low equipment costs, but the consumption and cell costs are high, but the photoelectric conversion efficiency is also high, which is more suitable for power generation under outdoor sunlight; thin film solar cells have relatively high equipment costs, but consume and battery The cost is very low, but the photoelectric conversion efficiency is more than half of that of the crystalline silicon cell, but the low light effect is very good, and it can generate electricity under ordinary light, such as the solar cell on the calculator.
4) EVA
The function is as above, mainly to bond and encapsulate the power generation main body and the backplane
5) Backplane
Function, sealing, insulation, waterproof (usually TPT, TPE and other materials must be resistant to aging, most component manufacturers have a 25-year warranty, tempered glass, aluminum alloy is generally no problem, the key lies in whether the backplane and silica gel can achieve Require.)
6) Aluminum alloy
Protect the laminate, play a certain role in sealing and supporting
7) Junction box
It protects the entire power generation system and acts as a current transfer station. If the component is short-circuited, the junction box will automatically disconnect the short-circuit battery string to prevent the entire system from being burned. The most important thing in the junction box is the selection of diodes. Depending on the type of cell in the assembly, the corresponding diodes are also different.
8) Silica gel
The sealing function is used to seal the junction between the component and the aluminum alloy frame, and the component and the junction box. Some companies use double-sided adhesive tape and foam instead of silica gel. Silicone is widely used in China. The process is simple, convenient, easy to operate, and the cost is very low.
Its function is to protect the main body of power generation (such as cells), and the selection of light transmission is required. 1. The light transmission rate must be high (generally more than 91%); 2. Ultra-white tempered treatment
2) EVA
Used to bond and fix the tempered glass and the main body of power generation (such as cell). The quality of the transparent EVA material directly affects the life of the module. The EVA exposed to the air is easy to age and yellow, which affects the light transmittance of the module, thereby affecting In addition to the quality of EVA itself, the power generation quality of the module is also very affected by the lamination process of the module manufacturer. Component life.
3) Cells
The main function is to generate electricity. The mainstream in the main power generation market is crystalline silicon solar cells and thin-film solar cells, both of which have their own advantages and disadvantages. Crystal silicon solar cells have relatively low equipment costs, but the consumption and cell costs are high, but the photoelectric conversion efficiency is also high, which is more suitable for power generation under outdoor sunlight; thin film solar cells have relatively high equipment costs, but consume and battery The cost is very low, but the photoelectric conversion efficiency is more than half of that of the crystalline silicon cell, but the low light effect is very good, and it can generate electricity under ordinary light, such as the solar cell on the calculator.
4) EVA
The function is as above, mainly to bond and encapsulate the power generation main body and the backplane
5) Backplane
Function, sealing, insulation, waterproof (usually TPT, TPE and other materials must be resistant to aging, most component manufacturers have a 25-year warranty, tempered glass, aluminum alloy is generally no problem, the key lies in whether the backplane and silica gel can achieve Require.)
6) Aluminum alloy
Protect the laminate, play a certain role in sealing and supporting
7) Junction box
It protects the entire power generation system and acts as a current transfer station. If the component is short-circuited, the junction box will automatically disconnect the short-circuit battery string to prevent the entire system from being burned. The most important thing in the junction box is the selection of diodes. Depending on the type of cell in the assembly, the corresponding diodes are also different.
8) Silica gel
The sealing function is used to seal the junction between the component and the aluminum alloy frame, and the component and the junction box. Some companies use double-sided adhesive tape and foam instead of silica gel. Silicone is widely used in China. The process is simple, convenient, easy to operate, and the cost is very low.
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