Double glass photovoltaic cell module

Abstract

The invention discloses a photovoltaic cell assembly with two glass layers. The assembly comprises a body, a reflective coating, an end sealing block and a frame, wherein the body comprises the first glass layer, a first encapsulating layer, a cell assembly layer, a second encapsulation layer and the second glass layer, the first glass layer, the first encapsulating layer, the cell assembly layer, the second encapsulation layer and the second glass layer are sequentially stacked, and the outer edge of the first glass layer and the outer edge of the second glass layer are higher than the outer edge of the first encapsulation layer, the outer edge of the cell assembly layer and the outer edge of the second encapsulation layer; the reflective coating is arranged on the second glass layer; the end sealing block is disposed between the first glass layer and the second glass layer and located on the periphery of the first encapsulation layer or the cell assembly layer or the second encapsulation layer; the frame is disposed on the outer periphery of the body. According to the photovoltaic cell assembly, by means of the end sealing block, the defect that a traditional encapsulation material is exposed outside is overcome, moisture and corrosive gas can be prevented from entering the assembly, and the service life of the assembly is prolonged; the reflective coating can reflect light penetrating through a gap of a cell to reduce encapsulation loss, and the frame can effectively protect the cell assembly.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a double-glass photovoltaic cell assembly. Background technique [0002] Existing double-glass modules use tempered glass as the back sheet, high UV transmittance EVA or PVB on the front, and white EVA or PVB on the back layer of EVA. The disadvantages of this component are as follows: [0003] First, the back of the double-glass module uses air-tight and water-impermeable glass, which can prevent water vapor from entering the module, but the gap between the edges of the two pieces of glass is still a weak link, and water vapor can still enter the module through the packaging film, and Due to the sealing effect of glass, it is difficult to diffuse out. Under the action of ultraviolet rays, small molecules such as acetic acid produced by the decomposition of the EVA packaging film will still corrode the battery sheet and reduce the life of the component. If it is PVB encapsulation, t...

AI Technical Summary

Problems solved by technology

If it is PVB package, the problem will be more serious due to the high water absorption of PVB

[0004] Second, the problem with using white EVA or PVB on the back is that the white part is likely to spread to the front of the cell after long-term use, forming a shield on the cell, causing hot spots, and affecting the efficiency of the module

[0005] Third, there is a safety hazard in the absence of a frame on the edge of the module, because the most vulnerable part of the tempered glass is the edge and four corners, if not properly protected, it is easy to cause the module to break

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