Novel silicon base film solar battery and packaging method thereof

Abstract

The invention discloses a packaging method of a novel silicon base film solar battery. The solar battery comprises a front board component, a packaging film, a convergence belt, silica gel films and a piece of backboard glass; the packaging method of the novel silicon base film solar battery comprises the steps of: firstly, depositing a transparent conductive film on a piece of float glass; secondly, depositing a silicon film with Plasma Enhanced Chemical Vapor Deposition technology (PECVD); thirdly, preparing a back electrode with sputtering or chemical vapor deposition technology; fourthly, sputtering or printing a back reflection layer; fifthly, performing insulating treatment at the edge; sixthly, disposing PVB (Polyvinyl Butyral) in the center of the front board component, wherein the length and the width of the PVB are respectively 5-30 mm smaller than the length and the width of a front board, and then paving the silicon gel films on the periphery of the PVB, wherein the thickness of the silicon gel films is the same as that of the PVB, then the whole front board is completely paved by the PVB and the silicon gel films, the silicon gel film at a leading-out part of the convergence belt has double layers, the other silicon gel films have a single layer, and the convergence belt is leaded out from the middle part of the double-layer silicon films; seventhly, covering the backboard glass, and laminating to form the complete component; and eighthly mounting a connecting box. The scheme can more efficiently reduce water vapor to enter the component, thereby improving the reliability of the component and reducing the loss of electrical property of the component.

Description

technical field [0001] The invention relates to a novel silicon-based thin-film solar cell and a packaging method thereof, belonging to the field of photovoltaic cell manufacturing. Background technique [0002] At present, the packaging method of silicon-based thin-film solar cell modules widely used at home and abroad is to sandwich a whole piece of PVB or EVA packaging material between the front plate and the back plate, and combine the front plate, the packaging material and the back plate through the lamination process. , forming a complete laminate. This packaging method has the following disadvantages: 1. The water blocking performance of PVB and EVA is not very good, especially EVA, the water blocking performance is even worse. With this packaging method, water vapor will enter the component from the edge of the component, reducing the electrical performance and reliability of the component; Where the belt is led out from the edge of the module, the confluence belt...

AI Technical Summary

Problems solved by technology

This packaging method has the following disadvantages: 1. The water blocking performance of PVB and EVA is not very good, especially EVA, the water blocking performance is even worse

With this packaging method, water vapor will enter the component from the edge of the component, reducing the electrical performance and reliability of the component; Where the belt is led out from the edge of the module, the bus belt is directly attached to the surface of the power generation membrane. There is no sealing material between the two, and water vapor can easily enter the interior of the module along the bus belt, resulting in a decrease in the electrical performance of the module or even failure, which seriously affects the reliability of the module. reliability

Especially in the production of BIPV modules, it is generally required that the confluence belt must be drawn out from the side of the module, which is more prone to the above problems

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