Densely-arranged solar cell string and preparation method, module and system thereof

Abstract

The invention relates to a densely-arranged solar cell string and a preparation method, module and system thereof. The preparation method mainly comprises the following steps of fabricating a solar cell piece, forming H-shaped electrodes on a front surface and a back surface of the cell piece, wherein a main gate is a segmental electrode, and a welding point is arranged at one end of the main gate; printing strip-shaped hot melt glue at a position of the welding point along a direction perpendicular to the main gate, wherein the hot melt glue is exposed out of the welding point; cutting the cell piece along a battery cutting region so that cell piece is cut into a plurality of small cell pieces; coating a conductive adhesive or soldering paste at the position of the welding point of the main gate on a front surface of each small cell piece; overlapping the welding point of the main gate on a back surface of one of the small cell pieces with the welding point of the main gate on the front surface of the other one small cell piece, and performing heating so that the two small cell pieces are electrically connected by the conductive adhesive or the soldering paste; and sequentially connecting the plurality of small cell pieces to form the solar cell string. The preparation method has the beneficial effects that the utilization area of the cell pieces in an effective region of the module is expanded, and the module power is improved.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a densely arranged solar cell string, a preparation method, components and a system thereof. Background technique [0002] A solar cell module is a photovoltaic power generation unit that converts light energy into electrical energy. Lower production costs and higher energy conversion efficiency have always been the goals pursued by photovoltaic modules. For the current conventional solar cell components, the cells in the component are welded with ribbons to connect the positive electrode of one cell to the negative electrode of another cell to form a solar cell string, and then the front layer material, packaging material, solar cell string, packaging material, The back layer material is laminated to form a solar cell module. In the process of connecting cells in series, since the positive and negative electrodes of the cells are on both sides of the battery, welding needs ...

AI Technical Summary

Problems solved by technology

But the disadvantages are: 1) In the scheme disclosed by this patent, the main grid lines are arranged perpendicular to the series connection direction of the batteries, and the current must pass through the thin grid lines and then flow into the welding points to be collected; 2) Adjacent cells pass through Conductive adhesive connection, in the actual production process, there are certain problems in its mechanical strength and connection reliability

Images