PVB (Polyvinyl Butyral) double-glass photovoltaic module structure and press-fitting process

Abstract

The invention discloses a PVB (polyvinyl butyral) double-glass photovoltaic module structure and a press fitting process, and belongs to the technical field of double-glass photovoltaic module production, the PVB double-glass photovoltaic module structure comprises a crystal silicon wafer, the top of the crystal silicon wafer is sequentially provided with an upper layer PVB film and an upper layer glass substrate from bottom to top, and the bottom of the crystal silicon wafer is sequentially provided with a lower layer PVB film and a lower layer glass substrate from top to bottom. According to the invention, due to the super-large specific surface area, Ce02 has a large contact area in the upper PVB film and the lower PVB film, when the upper PVB film and the lower PVB film are subjected to external force, more microcracks exist and more force is consumed compared with a common filler, further expansion of the cracks can be prevented and passivated, and the purpose of toughening is achieved; formaldehyde plays a role in connecting phenol and amine in the Mannich reaction, and can be easily removed after the reaction is completed, so that the toughness of the upper PVB film and the lower PVB film can be greatly improved in order to increase the reaction activity and promote the reaction to proceed forwards, and excellent use performance is obtained.

Description

technical field [0001] The invention belongs to the technical field of double-glass photovoltaic module production, and in particular relates to a PVB double-glass photovoltaic module structure and a press-fitting process. Background technique [0002] Under the background of the increasingly serious crisis of conventional energy supply shortage and the massive development and utilization of fossil energy that have caused natural environmental pollution and human living environment damage, countries around the world have vigorously supported the photovoltaic industry from a strategic point of view in order to ensure energy supply and establish a low-carbon and environmentally friendly society. As a result, the photovoltaic industry has gained a background of rapid development, among which the development of photovoltaic modules is more prominent. [0003] Photovoltaic modules in the prior art still have some deficiencies in the process of press-fitting. During the process of...

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Problems solved by technology

[0005] The purpose of the present invention is: in order to solve the shortcomings of the photovoltaic modules in the prior art in the process of press-fitting, the PVB film used in the process of press-fitting tends to show poor thermal stability. Phenomenon, yellowing and discoloration, seriously affect the photovoltaic effect of crystalline silicon wafers, which will reduce the working efficiency of crystalline silicon wafers, and in the process of pressing, PVB film is prone to cracks, which will lead to failure of pressing and processing, and the defective rate is high High problem, and proposed a PVB double-glass photovoltaic module structure and press-fitting process

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