Preparation method of series-parallel thin film battery assembly

Abstract

The invention discloses a preparation method of a series-parallel thin film battery assembly. The method is mainly characterized in that a piece of TCO conductive glass is equally divided into two parts, which are the same in area, through a laser etching line, wherein the two parts are a series conductive portion and a parallel conductive portion, the series conductive portion is used for carrying out laser scribing on series sub-batteries, the parallel conductive portion is used for carrying out laser scribing on parallel sub-batteries, the series sub-batteries and the parallel sub-batteries are respectively connected by using a drainage strip and a bus bar, and then the series conductive portion and the parallel conductive portion are connected so as to manufacture the required series-parallel thin film battery assembly. According to the preparation method disclosed by the invention, a defect that the film uniformity is poor after large-area film plating is considered, characteristics of a series circuit and a parallel circuit are combined, and problems brought about by film difference and series connection of the sub-batteries are solved. Optimization for electrical parameters is carried out in allusion to a characteristic of high voltage or high current in the electrical parameters of a thin film battery, thereby avoiding influences imposed on such factors as inverter model selection and power station design in power station construction in a later period.

Description

technical field [0001] The invention relates to the technical field of thin-film solar cells, in particular to a method for preparing series-parallel thin-film battery components. 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. The materials of thin-film cells are different, but the manufacturing methods are basically the same. Basically, three lasers are used to scribe into sub-cells with the same area. The battery is then formed into a series circuit by coating, and finally the junction box is installed to complete the production of the battery board. Specifically, the first laser scribes the TCO conductive film, which is divided into n (n is a positive integer) sub-cells with the same area, and then PECVD or PVD is used to coat the film to form a PN junction; after the second laser scribe, (The second laser is to offset the first laser marking, th...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, and provide a method for preparing series-parallel thin film battery components, which can effectively improve the electrical performance parameters of the battery components, especially the occurrence of thin films with either high voltage or high current. Battery electrical parameters; secondly, it can effectively solve the problem of poor uniformity of the film layer or the decrease of power generation caused by the poor laser marking of a certain sub-cell, especially for large-area coated thin-film battery components

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