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A photovoltaic module packaging method

A photovoltaic module packaging method


Patent abstract 】 【 the invention discloses a photovoltaic module encapsulation method, on the basis of the existing industrial pv module encapsulation structure, the solar cell is smooth, glass (or film) and the top of the EVA film at the top of the add a layer of glass fiber, the formation of glass before (or film)/(top of the EVA film)/top of the top of the glass fiber/EVA film solar cell/(glass fiber) on the back the back/EVA film/back structure, in order to improve the solar cell receives transmittance encapsulation materials, especially the increase of 400-900 nm visible transmittance, in order to reduce the loss of optical encapsulation, Increase component output power.


[patent description] a photovoltaic module packaging method


[technical field]


[0001] the present invention belongs to the field of photovoltaic module preparation, and specifically relates to a photovoltaic module packaging method.


[background technology]


[0002] in order to improve the life of solar cells and obtain the required electrical performance, solar cells need to be packaged and connected internally, and the laminating mechanism is adopted to make the smallest power generation unit -- photovoltaic module. In the existing technology, the packaging materials used in the packaging structure of crystalline silicon components are arranged in the sequence shown in figure 1. From the receiving surface, the sequence is: glass 10/ top surface EVA film 11/ solar cell 12/ back side EVA film 13/ back side glass fiber 14/ back panel 15. The laying sequence of flexible film component packaging materials is shown in figure 2. From the receiving surface, the sequence is as follows: front film 20/ top surface EVA film 21/ solar cell 22/ back surface EVA film 23/ back plate 25. For example, the patent 201220475621.1 discloses a method for packaging solar pv modules. The packaging materials are laid in sequence from the receiving surface: back plate/top surface EVA film/solar cell/back surface EVA film/packaging layer.


[0003] in the existing technology, light passes through the glass (or front film)/ top EVA film successively from the component surface to the solar cell, and the glass (or front film) and top EVA film will absorb light, causing optical packaging loss, so that its actual power is less than theoretical power.


[0004] the higher the transmittance of the solar cell to the combination of glass (or front film) on the surface of light and EVA film on the top surface, the more light will enter the battery, and the output power of the battery is proportional to the intensity of light, the higher the output power of the battery. Under the condition that the battery and other auxiliary materials remain unchanged, the transmission rate of glass (or front film) and top EVA film packaging combination can be increased, especially the transmission rate of visible light band between 400-900nm, which can increase the output power of components and reduce the loss of optical packaging.


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