Talk about EVA solar battery encapsulation film this product description
Release date:2016-06-30 11:59 source:http://www.hzxz88.com Views:
1.1 EVA solar battery product profile of the film
The solar cell film is made of EVA (ethylene/vinyl acetate copolymer) as the main raw material, after adding various additives, through heat extrusion molding products.The non-viscous film at room temperature, easy cutting split operation.At present, this film is mainly used for encapsulation of solar panels.When in packaging, cutting the size of the first film, according to the glass - the film - panels - film - TPT composite in aluminum alloy frame;Then, in the laminating machine heating, pressure, and vacuum;Finally, the time needed for the isothermal curing furnace is put in the set temperature.
EVA film characteristics description
1: high light transmittance, and improve the photoelectric conversion efficiency of components.
2: a reasonable degree of crosslinking, ensure good stability and service life of components.
3: excellent ultraviolet aging resistance and good resistance to wet and heat aging line, ensure that components in foreign door the service life of 25 years.
4: low shrinkage percentage elongation, ensure that your component dimension stability and consistency.
5: for all kinds of glass back and strong adhesive ability, ensuring safe and efficient operation of the component.
1.2 solar battery simple introduction
1.2.1 what are solar cells
The solar cell is through the photoelectric effect or photochemical effect of the light energy into electricity directly to the device.
1.2.2 the classification of the solar cell
Solar cells according to the crystalline state can be divided into the crystalline diaphragm and non-crystalline tied diaphragm (the following says a -) as two categories, while the former is divided into single crystal shape and crystal shape.
According to the material can be divided into the silicon thin film form, organic compound semiconductor thin film shape and form, and compound semiconductor thin film form is divided into non-crystalline form (a - Si: H, a - Si: H: F, a - SixGel - x: H, etc.), Ⅲ V (GaAs, InP, etc.), Ⅱ Ⅵ (Cds) and zinc phosphide (recent 3 p 2), etc.
Solar cells according to different materials, the solar cell can also be divided into: silicon solar cells, multivariate compound thin film solar cells, polymer multilayer modified electrodes type solar cell, nanocrystalline solar cells, organic solar cells, including silicon solar battery is the most mature development, dominant in the application.
(1) silicon solar cells
Silicon solar cell is divided into monocrystalline silicon solar cells, polycrystalline silicon thin film solar cells and amorphous silicon thin film solar cells.
Monocrystalline silicon solar cell conversion efficiency is highest, technology is also the most mature.The highest conversion efficiency of 24.7% in the laboratory, scale production of efficiency is 15%.In large scale application and industrial production is still dominant, but as a result of single crystal silicon cost price is high, reduce the cost of its very difficult, in order to save silicon materials, development of the polycrystalline silicon thin film and amorphous silicon thin film as monocrystalline silicon solar battery replacement products.
(2) multivariate compound thin film solar cells
Multivariate compound thin film solar cell material for inorganic salts, mainly including gallium arsenide III - V compounds, cadmium sulfide, cadmium sulphide and copper Gu selenium thin-film batteries, etc.
Cadmium sulfide, cadmium telluride, the efficiency of polycrystalline silicon thin-film batteries is amorphous silicon thin film solar cells with high efficiency, the cost was lower than those of single crystal silicon cell, and also easy to mass production, but because there are highly toxic, cadmium can cause serious pollution to the environment, therefore, is not a crystalline silicon solar cell is the most ideal alternative products.
(3) polymer multilayer modified electrodes type solar cell
Replace the inorganic materials with organic polymer is just beginning to a solar battery research direction.Due to the flexible organic materials well, make easy, wide material source, the cost advantages of the bottom, thus for large-scale use of solar energy, to provide cheap electricity is of great significance.But with organic materials preparation of solar cell research just beginning, whether it's service life, or the battery efficiency cannot be compared with inorganic materials, especially in silicon.Can become a practical products, further research has yet to be.
(4) nanocrystalline solar cells
Nanometer TiO2 crystal chemical energy solar cell is a newly developed, advantages is its cheap cost and simple process and stable performance.Its stable photoelectric efficiency over 10%, production costs only 1/5 ~ 1/10 for silicon solar cell. The life can reach more than 2 o years.
But as a result of the research and development of such batteries, estimates that in the near future will gradually took to the market.
(5) organic solar cells
Organic solar cells, as the name implies, is made of organic materials constitute the core part of the solar cell.Everybody for organic solar cells are not familiar with, it is reasonable in the matter.Now in the production of solar cells, more than 95% are silica based, and the remaining less than 5% is also made of other inorganic materials.