Series connection module for photovoltaic cell layer and its preparation method and application

Abstract

The invention provides a series-connected assembly for photovoltaic cell layers and a preparation method thereof. The series-connected assembly includes a first layup layer and a second layup layer. The present invention also provides a method for connecting photovoltaic cell layers in series. The first lay-up layer, the photovoltaic cell layer and the second lay-up layer, which are laid in sequence, are laminated together by hot pressing. The invention can accurately position the battery layer when placing the battery layer, so as to avoid the problem that the battery sheet and the conductive strips are dislocated and affect the electrical performance; the invention has significant effects on the transfer times of the battery and the stress degree of the battery in the production process. The invention can shorten the process of component processing; the invention can improve the battery arrangement accuracy of the component during the production process of the component, and reduce the positioning difficulty of the first layer and the second layer in the production process; the present invention can Reduce the loss of batteries during processing, reduce the man-hours and energy consumption of component manufacturing, and save the input cost of the welding process.

Description

technical field [0001] The invention relates to the field of photovoltaics, in particular to a series-connected component for photovoltaic cell layers and a preparation method and application thereof. Background technique [0002] The current mainstream photovoltaic module manufacturing process is mainly composed of a 5-layer structure (glass-upper EVA-battery layer-lower EVA-back sheet) and external structural components, of which the battery layer is mainly composed of photovoltaic solar crystalline silicon cells and used to connect each cell. The positive / negative electrode is composed of metal welding strips; the main process of the battery layer is: arranging several batteries in a row, each battery passes through two sets of welding strips, and one set of welding strips is welded with the positive electrode of the battery and the negative electrode of the previous battery. , another group of welding ribbons is welded with the negative electrode of the battery and the p...

AI Technical Summary

Problems solved by technology

[0003] Since the metal wire connecting two batteries needs to be inserted from the front of the battery to the back of the next battery, the bending part of the metal wire will squeeze the edge of the battery to a certain extent, so there must be a large distance between the batteries. gap to ensure that the pressure of the metal ribbon on the edge of the battery will not cause damage to the battery; and with the development of the industry, the thickness of the silicon wafer and the battery will be further thinned, and the ability of the battery edge to withstand external forces will become weaker and weaker, so According to the current process method, it is necessary to continuously expand the distance between cells, which will lead to a series of problems such as a decrease in the efficiency of component packaging.

In addition, the traditional process of successively welding battery cells consumes a lot of time and energy, and the inevitable loss of batteries is also very serious during repeated circulation, contact with metals, machines and welding processes

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