A twelve-main grid battery sheet and a manufacturing process thereof

Abstract

The invention discloses a twelve main grid cell sheet, which relates to the technical field of solar cell production and manufacture. The invention comprises a front electrode and a back electrode. Twelve main grid lines and a plurality of thin grid lines are arranged on the front electrode, which are parallel to each other. Both ends of the main gate line are provided with a bifurcation structure; The two main grid lines on the connected battery chips are connected in a dot-line manner. The width of the dot-line connection is 0.6 mm, and the width of the dot-line connection is 0.1 mm. A maingate line between two adjacent thin gate line is also connected with a small section of gate line. 12 main grid cell sheet made of twelve main grid lines, a plurality of thin grid line and a small section of grid lines arranged on that main grid lines can effectively enhance the current collection effect; At that same time, a small section of gate line is added to avoid the gate break due to the fine gate line and the screen blockage during printing.

Description

technical field [0001] The invention belongs to the technical field of solar cell production and manufacturing, and in particular relates to a 12-busbar cell and a manufacturing process for a 12-busbar cell. Background technique [0002] With the rapid development of the photovoltaic industry, high-efficiency and differentiated products have become the ace in the competition of major companies. The use of high-efficiency and cost-effective photovoltaic modules to reduce the cost of electricity has gradually become the development direction and consensus of the photovoltaic industry. Sunlight enters the battery from the front of the cell, and the metal electrodes on the front will block part of the light, and this part of the light energy shining on the electrodes cannot be converted into electrical energy. From this perspective, we hope that the grid lines should be as thin as possible. The purpose of printed grid lines is to conduct current. From the perspective of resisti...

AI Technical Summary

Problems solved by technology

The purpose of printed grid lines is to conduct current. From the perspective of resistivity, the thinner the grid line, the smaller the conductive cross-sectional area and the greater the resistance loss. However, if the grid line is too thin, it is easy to block the grid during printing and cause the grid to break. EL test When the grid is broken, the situation is more obvious, resulting in an increase in the EL degradation ratio