Method of monolithic photo-voltaic module assembly

Abstract

Method for manufacturing a photovoltaic module (1) comprising: a) providing an electrically conductive substrate, the substrate being provided with a predetermined electrical pattern; b) depositing a solder paste (7) onto the electrically conductive substrate at pre-defined interconnection locations; c) placing a first encapsulant layer (3) provided with a pattern of openings onto the electrically conductive substrate, the pattern of openings corresponding with the locations of the solder paste (7); d) placing back-contact solar cells (4) on the first encapsulant layer so as to have a match of the electrical pattern of the back-contact solar cells with the electrical pattern of the electrically conductive substrate; e) placing a second encapsulant layer (5) on the back-contact solar cells (4), and placing a glass layer (6) on the second encapsulant layer (5); ; f) applying heat and pressure to the components (2, 3, 4, 5, 6, 7) to cause the encapsulant materials to flow and form a monolithic photovoltaic module, characterised by local application of at the interconnection locations utilizing a laser to couple its energy locally into the solar cell from the side of the glass layer, so as to cause the solder paste to reflow between each interconnection location and its respective matching connection location on the back-contact solar cell for establishing electrical interconnection between the back-contact solar cells and the electrically conductive substrate.

Description

technical field [0001] The invention relates to a method for manufacturing photovoltaic module assemblies. Background technique [0002] A photovoltaic (PV) module is a device that includes an array of solar cells that convert solar energy directly into electrical energy. [0003] One way to achieve low-cost PV modules is to use high-efficiency, thin back-contact solar cells. In back-contact solar cells, conductive wires that are opaque to sunlight are located on the back of the solar cell (back-contact mode). In this way, substantially no conductive wires are required on the front side of the solar cell, resulting in a relatively large area that can be used to collect sunlight. Thus, back contact solar cells provide a larger current generating surface area compared to conventional H-mode solar cells, while enabling a reduction in cell spacing between them, resulting in an overall increase in the electrical output of the PV module. [0004] In order to form such PV module...

AI Technical Summary

Problems solved by technology

This has an adverse effect on the reliability of the process since the state of the electrical connection is not well defined

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