Multi-main-gridline high-efficiency battery piece compatible with half battery

Abstract

The invention provides a multi-main-gridline high-efficiency battery piece compatible with a half battery. The multi-master-gridline high-efficiency battery piece comprises a front face electrode, a silicon substrate, a back aluminium electric field and back electrodes, which are set in sequence. The front face electrode comprises a plurality of longitudinal front face main gridlines and a plurality of transverse front face secondary gridlines. The front face main gridlines and the front face secondary gridlines are mutually perpendicular and are intersected. The front face electrode comprisestwo parts which are in up and down symmetrical. Two ends of the front face main gridlines at each part are fork structures. No gridline connection exists in a middle area of the upper and lower parts, so a front face blank area is formed. The back aluminium electric field and the back electrodes are longitudinally divided into two symmetrical parts. No back field and back electrodes exist in a middle blank area. The width of the blank area is equal to intervals of the front face secondary gridlines. The locations of the blank area and the front blank area are overlapped. The back electrodes comprise segmented electrodes. The back aluminium electric field is set in an area except for the areas of the back electrodes. The back aluminium electric field is transversely connected with two sides of the back electrodes. According to the structure, the battery efficiency can be improved, the silver paste consumption is reduced, and a whole battery and the half battery are compatible.

Description

technical field [0001] The invention belongs to the field of solar cells, in particular to a multi-busbar high-efficiency cell compatible with half cells. Background technique [0002] As a clean and efficient energy utilization method, solar photovoltaic power generation has attracted widespread attention from all over the world, and it is a strategic emerging technology industry that the country focuses on. [0003] Metal electrodes are an important part of solar cells, which mainly play the role of current collection and transmission, and have an important impact on battery performance. [0004] Analyzed from the shading angle of solar cell electrode design, sunlight enters the battery from the front of the battery, and the metal electrode on the front will block a part of the silicon wafer, and this part of the light energy shining on the electrode cannot be converted into electrical energy. From this point of view, we hope that the grid The thinner the line, the better...

AI Technical Summary

Problems solved by technology

However, the existing electrode pattern based on the design of the whole battery cannot be directly cut into half, and the compatibility between the whole battery and the half battery cannot be realized.

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