A solar cell module with multiple sub-batteries connected in series and its preparation method

Abstract

The invention discloses a solar cell module with sub-cells connected in series and a manufacturing method of the solar cell module. The technical problems that the number of sub-cells is limited and the output voltage obtained through series connection is limited are solved. According to the technical scheme, the method is implemented on the basis of the manufacturing process of the solar cell module. The method includes the steps that a conductive thin film layer is deposited on a glass substrate, a photovoltaic absorbing layer is etched and deposited, a back electrode layer is etched and deposited, and the module with the sub-cells connected in series is formed in an etched mode. According to the etching mode of the conductive thin film layer, etching lines intersect with one another in the transverse direction and longitudinal direction of the glass substrate so that the conductive thin film layer can be cut, the cut conductive thin film layers form independent conductive modules through transverse grooves and longitudinal grooves, the independent conductive modules are arranged in sequence, every two adjacent rows of independent conductive modules at the ends are connected end to end so that a front electrode conductive strip arranged in the shape of S can be formed, and the photovoltaic absorbing layer and the back electrode layer are etched according to the shape of each front electrode conductive strip so that the sub-cell module with the sub-cells connected in series can be formed.

Description

technical field [0001] The invention relates to a preparation process of a solar cell module, which belongs to the field of thin-film solar cell manufacturing, in particular to a solar cell module with multiple sub-batteries connected in series and a preparation method thereof. Background technique [0002] With the continuous development and progress of human beings, energy consumption is increasing, and traditional energy is being consumed rapidly. Solar energy is a renewable and clean new energy with huge reserves. In the long run, it is most likely to replace traditional energy. When using solar cells to generate electricity, the voltage of a single battery is difficult to increase, the output current is large, the heat loss of the battery itself and the transmission wire is large, and a large amount of energy is consumed during transmission; and when connected to a photovoltaic array for power generation At this time, the occasional hot spot effect of some cells will i...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: the existing solar cell module is limited by the connection structure of the internal "sub-battery"—that is, the sub-battery blocks connected in series in the shape of "long and narrow strips", even if they are connected along the "narrow side" in the direction of series connection "Connection one by one will also be restricted by factors such as the total length, the narrow strips should not be too narrow, the width of the laser scribe line itself, and the accuracy of the scribed position—resulting in the technical problems of a limited number of sub-batteries that can be included in series and a limited output voltage obtained by series connection. , designed a solar cell module with multiple sub-batteries connected in series and its preparation method. By changing the marking method of the existing solar cell module, it solved the problem of the solar cell module that can be connected in series with sub-batteries and its limited voltage, as well as thermal The technical problem that the speckle effect cannot be effectively controlled

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