Solar cell, screen printing plate and solar cell module thereof

Abstract

The invention discloses a solar cell, a screen printing plate and a solar cell module thereof, belonging to the technical field of photovoltaics. The solar cell of the invention comprises a cell substrate and an electrode, wherein the electrode is arranged on the substrate; the electrode comprises a main grid line; the construction of the line area of the main grid line is in a structure comprising at least one thin grid line to reduce the contact area between the main grid line and the substrate; the screen pringting plate provided by the invention is used for manufacturing the electrode of the solar cell of the invention by screen printing; and meshes for composing and forming the main grid line of the electrode are arranged on the screen printing plate. The solar cell module provided by the invention comprises a plurality of the solar cells provided by the invention. The solar cell and the solar cell module have low cost, and because the compound area between the metal electrode and the silicon in the cell structure is reduced, the conversion efficiency is improved, the output power of the module is increased, and in addition, the reliability after an interconnector is welded with a cell plate is good.

Description

technical field [0001] The invention belongs to the technical field of photovoltaics, and in particular relates to a solar cell, in particular to an electrode structure of a solar cell, a screen used for manufacturing the electrode and a solar cell assembly including a plurality of the solar cells. Background technique [0002] In view of the limited supply of conventional energy and the increase of environmental protection pressure, many countries in the world have set off an upsurge in the development and utilization of solar energy and renewable energy, and the technology of solar energy utilization has developed rapidly. The use of electric energy is becoming more and more extensive. The solar cell is one of the most common devices used to convert solar energy into electrical energy. In practical applications, a battery module composed of multiple solar cells connected in series is generally used as the basic application unit. [0003] As the basic unit of a solar cell...

AI Technical Summary

Problems solved by technology

At the same time, due to the inconsistency of the thermal expansion coefficient between the busbar of the silver electrode and the silicon of the solar cell substrate, the characteristics of the large area and the line height of the busbar will generate a large amount of heat in the subsequent process of welding and connecting the interconnection strips. Stress, so that debris and cracks are prone to occur during the welding process

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