Method for cutting full-back-contact crystalline silicon solar cell

Abstract

The invention relates to a method for cutting a full-back-contact crystalline silicon solar cell, and the method is used for cutting the whole solar cell into small pieces. The method comprises the steps: setting a cutting parameter of a solar laser scribing machine; enabling the front of the solar cell to face upwards and to be fixed a right-angle cutting platform of the laser scribing machine through vacuum absorption; setting a cutting width parallel to a busbar to be integral multiples of the width of a positive-negative busbar; carrying out cutting under the condition that the cutting depth is less than the thickness of the solar cell; marking the positive and negative electrode; and breaking the pieces off. The method can effectively improve the yield of solar cells, improves the production efficiency of the solar cells, also can prevent the positive and negative electrodes of the solar cells from going wrong, and provides a reliable guarantee for the subsequent high-speed and high-quality manufacturing of a solar cell module.

Description

technical field [0001] The invention relates to the technical field of finished or semi-finished products processing of solar battery modules, in particular to a cutting method of a crystalline silicon solar battery sheet in which all back electrodes are in contact. Background technique [0002] Solar cells are generally based on crystalline silicon, with a dark blue anti-reflection layer on the front of the substrate, dense bus lines on the front, and a conductive layer on the back to collect the electrical energy generated by sunlight conversion. and converge on the main bus line. [0003] Usually, according to the user's different dimensions and electrical performance parameters of solar cell components, it is necessary to cut the entire solar cell into small solar cells, and then solder them in series and paste them on the PCB board to form a usable solar cell. Modules, so how to quickly and effectively cut solar cells has become a technical problem that needs to be s...

AI Technical Summary

Problems solved by technology

However, the current mainstream solar cell production method using back-cutting is likely to cause damage to the bus line or relatively fixed cutting size, resulting in low yield and utilization rate, directly resulting in waste of materials and increased costs.

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