Back contact solar cell, assembly, preparation method and system

Abstract

The invention relates to a back contact solar cell, a back contact solar assembly, a preparation method and a system. The preparation method of the cell assembly comprises the steps that main gate electrodes are prepared on the back surface of a cell so that the cell can be divided into a plurality of sub-cells, base electrodes and emission electrodes which are alternately arranged are prepared on each sub-cell, in each sub-cell, currents of all the emission electrodes are converged to the same main gate electrode, and the main gate electrodes are arranged on the back surface of the cell. The current of each base electrode is converged to the other main gate electrode, so that the back contact solar cell is obtained. Cutting is started from the front face position, corresponding to a main gate electrode, of the back contact solar cell till the surface of the main gate electrode, so that a plurality of cut sub-cells which are connected in series through the main gate electrode are manufactured, and the back contact solar cell assembly is obtained. According to the preparation method, through the structural design of the back electrode, wireless interconnection between the adjacent sub-cells in the back contact solar cell assembly can be realized, so that the interconnection process of the sub-cells can be simplified, and the cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a back-contact solar cell, component, preparation method and system. Background technique [0002] A solar cell is a semiconductor device that converts light energy into electrical energy, and is the core device of solar photovoltaic power generation. In recent years, photovoltaic power generation technology, as a mainstream technology for utilizing solar energy resources, is an important technology in the field of green energy development, and has been market-oriented and commercialized. With the update and iteration of technology, the development trend of photovoltaic module products is the continuous improvement of module output power. [0003] Back-contact solar cells have attracted much attention as a high-efficiency solar cell. There is no electrode on the light-receiving surface, which can reduce the shading loss caused by electrode patterns, effectively increase the ...

AI Technical Summary

Problems solved by technology

However, this kind of battery assembly needs to rotate one of the sub-cells to realize the interconnection of the sub-cells. Therefore, the interconnection process of adjacent sub-cells is cumbersome, and it is necessary to consume soldering tape (or conductive glue) to realize the interconnection of the adjacent sub-cells. The electrical contact between the adjacent sub-cells, that is, the use of solder ribbons between the sub-cells to achieve wired interconnection further increases the interconnection process of the sub-cells, and the investment of solder ribbons (or conductive glue) is also reduced. Increased cost of battery components

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