Preparation method of solar cell module

Abstract

The invention discloses a method for preparing a solar cell module. The method is characterized by directly connecting cell sheets in series in a cell string laying step at a component lamination station; removing a transfer step in the prior art that the cell sheets are connected in series and then the cell string is transferred to the component lamination station; avoiding the problems of cell sheet cracking and connector breaking possibly generated in the transfer step; and reducing the requirement for the tensile strength of the connector.

Description

technical field [0001] The present invention relates to a preparation method of a solar cell module. Background technique [0002] Solar cell modules (also called solar panels, photovoltaic modules) are the core part of the solar power generation system. Solar cell module refers to the smallest indivisible solar cell combination device with external packaging and internal connection, which can provide DC output alone. It is mainly composed of solar cells, tempered glass, EVA, backplane and frame. [0003] The manufacturing method of a solar cell module mainly includes the following steps: connecting cells in series, stacking modules, laminating modules, and framing. [0004] Among them, the series connection of the battery slices is mainly: a plurality of battery slices are connected in series along a certain arrangement direction, and the plurality of battery slices are connected in series to form a battery string; The front side (front electrode) of a cell is connected i...

AI Technical Summary

Problems solved by technology

During the transfer process of the battery string, the cells are easily affected by external forces, which increases the probability of cracks, and the cracks of the cells will affect the performance of solar cell modules

Moreover, during the battery string transfer process, the connectors will bear a certain amount of tension, and the string connection (the connection between the connectors and the cells) will also withstand a certain amount of tension. If the tensile strength of the connectors is not enough, the connectors in the battery During the string transfer process, it may be torn or broken. If the tensile strength of the string connection is not enough, the connector and the cell (the electrode on it) may also become a virtual connection or even be separated, and even the electrode may be damaged. Seriously affect the performance of the battery string

In order to ensure that the connectors and series connections are not damaged during the battery string transfer process, it is necessary to increase the tensile strength of the connectors and series connections, which increases the performance requirements for the connectors and electrode paste, and increases the connection strength. Cost of parts and electrode paste

[0008] In addition, two adjacent tiled cells in the battery string need to be connected in series through connectors. In order to prevent the connectors from short-circuiting the front and back of the same cell, a certain distance should be set between two adjacent tiled cells to avoid connection The components are in contact with the front and back of the same cell at the same time, which makes the cell tiles not densely packed, wastes the module area, and affects the efficiency of the module