What Is The Difference Between Solar Photovoltaic Cells And Photovoltaic Modules?
May 08, 2024
Solar photovoltaic cells (referred to as photovoltaic cells) are used to convert the sun's light energy directly into electrical energy. Ground photovoltaic systems use a large number of silicon solar cells based on silicon, which can be divided into monocrystalline silicon, polycrystalline silicon, and amorphous silicon solar cells.
The solar cell module is composed of high-efficiency crystalline silicon solar cells, ultra-white cloth-grained tempered glass, EVA, transparent TPT backsheet and aluminum alloy frame. It has the characteristics of long service life and strong mechanical resistance to external pressure.
The structural forms of conventional solar cell modules include the following: glass shell structure, bottom box module, flat plate module, and fully glue-sealed module without cover.
In short, solar photovoltaic cells are the core part of solar photovoltaic modules. Solar cells are mainly divided into crystalline silicon and amorphous silicon. The main raw material of crystalline silicon cells is silicon (in layman terms, sand or sand grains are refined through a series of reactions), which are then divided into monocrystalline silicon and polycrystalline silicon according to different casting processes.
Single polycrystalline silicon wafers and polycrystalline silicon wafers undergo processes such as texturing → diffusion → etching → coating → sintering → testing to obtain solar cells that can generate electricity. Amorphous silicon is mainly amorphous silicon thin film solar cells made from amorphous silicon compounds as the base material, and its market share is small.
The core component of solar photovoltaic modules is cells. To put it simply, the module production process is the process of assembling the arranged cell array using packaging materials. The mainstream battery cell layouts are 60 cells and 72 cells, which are arranged in series with soldering strips to form a square matrix.
Solar photovoltaic module packaging materials mainly include backsheet, EVA, translucent glass, aluminum frame and junction box, etc. The process mainly includes: material preparation → cell sorting → welding → lamination → EL test before lamination → lamination → EL test after lamination → Framing → Install junction box → Curing → Cleaning → I-V test → Packaging.
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