Battery piece, imbricate assembly and manufacturing method of battery piece

Abstract

The invention provides a battery piece, an imbricate assembly and a manufacturing method of the battery piece, and the battery piece comprises a semiconductor substrate, an antireflection film covering the front surface of the semiconductor substrate, wherein an edge main grid is located at one side of the front surface of the semiconductor substrate; and the edge main gate is formed on the uppersurface of the antireflection film and is separated from the semiconductor substrate. Based on the structure of the battery piece provided by the invention, the distance from the edge main gate to theedge of the corresponding side of the semiconductor substrate can be further reduced on the premise of avoiding electric leakage of the edge of the battery piece, so that the overlapping width between two adjacent battery units in the same battery string can be further reduced in a specific application scene of the imbricate assembly; therefore, cost reduction and efficiency improvement of the imbricate assembly are reliably achieved.

Description

technical field [0001] The invention relates to the field of solar photovoltaics, in particular to a battery sheet, a shingled assembly and a method for manufacturing the battery sheet. Background technique [0002] With the advancement of photovoltaic technology and the in-depth promotion of the "Top Runner" plan, China's photovoltaic industry has entered an era of high-efficiency product competition. Among them, shingled technology, one of the mainstream high-efficiency module technologies, is currently receiving widespread attention. The shingled module is to use the slicing technology to cut the redesigned battery mother sheet into long strip battery units of reasonable size, stack and arrange several long strip battery units to form a string, and then laminate them into a series and parallel layout. components. The shingled assembly allows the battery cells to be connected to each other in a closer manner. Under the same area, the shingled assembly can place more than ...

AI Technical Summary

Problems solved by technology

[0005] Usually, when the battery mother sheet is used to cut into battery cells, there must be a battery cell whose front busbar is formed by the edge busbar of the battery mother sheet. In order to reduce the distance between the front busbar of the battery cell and the corresponding side edge of the semiconductor substrate, It is necessary to reduce the distance between the edge busbar in the battery mother sheet and the corresponding side edge of the semiconductor substrate, but excessively reducing the distance between the edge busbar in the battery mother sheet and the corresponding side edge of the semiconductor substrate is likely to cause the edge busbar and semiconductor substrate formed after sintering. An electrical connection is formed between the P-type layers, which in turn leads to the edge leakage problem of the resulting battery cell with the edge busbar, and the edge leakage will seriously affect the efficiency of the battery cell

Images