Solar cell module and manufacturing method thereof

Abstract

The embodiment of the invention provides a solar cell module and a manufacturing method thereof, and belongs to the technical field of solar cells, the solar cell module comprises: a plurality of cellpieces, wherein the plurality of cell pieces are configured to convert solar energy into electric energy; connecting pieces which are stacked on the two side faces of the multiple battery pieces respectively, wherein the connecting pieces are configured to electrically connect the adjacent battery pieces in the multiple battery pieces so as to enable the multiple battery pieces to be connected inseries; a hot melt adhesive film which is laminated on the outer side surface, deviating from the plurality of battery pieces, of the connecting piece, wherein the hot melt adhesive film and the connecting piece are prefabricated into a composite film, so that the connecting piece electrically connects the adjacent battery pieces in the plurality of battery pieces; and a surface packaging material which is laminated on the outer side surface, far away from the plurality of battery pieces, of the composite film. Through the scheme of the invention, the conversion efficiency of the solar cell module is improved.

Description

technical field [0001] The present application relates to the technical field of solar cells, in particular to a solar cell module and a manufacturing method thereof. Background technique [0002] Solar cells are also known as "solar chips" or "photovoltaic cells", which can output voltage and generate current when there is a loop when the light meets certain illumination conditions. The basic structure of a solar cell is a combination of a P-type semiconductor and an N-type semiconductor, using the potential difference between the holes in the P-type semiconductor and the free electrons in the N-type semiconductor to generate current. That is, when the sunlight is irradiated, the light energy excites the electrons in the silicon atoms, resulting in the convection of electrons and holes. These electrons and holes are affected by the built-in potential, and are attracted by N-type and P-type semiconductors respectively. And gathered at both ends. At this time, if the outsid...

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Problems solved by technology

[0004] 1. Since the tinned copper strip is usually wide, there is light shading, which leads to a decrease in the conversion efficiency of the battery module

[0005] 2. Since the tin-coated copper tape needs to connect the upper and lower surfaces of adjacent cells, a gap of more than 2mm must be left between adjacent cells. This part of the sunlight cannot be effectively used, reducing the conversion efficiency of the cell module

[0006] 3. The process temperature of infrared welding equipment is generally above 300°C. For batteries with low temperature characteristics such as HJT batteries (Hetero-Junction with intrinsic Thin-layer), the process temperature cannot exceed 220°C. This welding process cannot be used for cell interconnection

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