Method for manufacturing parallel-series thin film battery pack

Abstract

The invention discloses a method for manufacturing a parallel-series thin film battery pack. The method mainly comprises the steps of separating out two or more sub batteries on a TCO (Transparent Conductive Oxide) conductive glass by a laser reticle, connecting the sub batteries in parallel by using a drainage strip, and then connecting the sub batteries in series by using a bus bar to manufacture the thin film battery pack. By adopting the method, the problems caused by film layer difference and series connection of the sub batteries are solved in sufficient consideration of poor uniformity of film layers after large-area coating and in combination with the characteristics of a parallel circuit; and a plurality of sub battery blocks connected in parallel can also be manufactured according to process requirements, and the parallel sub battery blocks are connected in series to form a parallel and series connection mode, so that the performance of batteries is improved. By adopting the manufacturing method, the later process and the series connection mode are identical and thus do not have difference on cost, and the most importantly, inevitable problems in production are solved, so the manufacturing method has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of thin-film solar cells, in particular to a method for preparing thin-film solar cells in parallel and then in series. Background technique [0002] At present, thin-film solar cells mainly include non-silicon-based thin-film solar cells, CIGS thin-film solar cells, and CdTe thin-film cells. Except for obvious differences in the coating materials of thin-film cells, the manufacturing methods are basically the same, and lasers are used to scribe the conductive film on conductive glass. Then use the PECVD or PVD process to coat the film to form PN and then go through the second laser scribing. After the coating is used to make the back electrode film layer, it goes through the third laser scribing to form a series of sub-cells, and then Use drain strips and bus bars to lead out the battery to form the positive and negative poles of the battery, and prepare for the installation of the junction box later; Pres...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, and provide a method for preparing thin-film battery modules that are connected in parallel and then in series, which can effectively solve the problem of power generation caused by poor uniformity of the film layer or poor laser marking of a certain sub-cell. The problem of power drop, especially for large-area coated thin-film battery components

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