Main-grid-free and anti-subcrack battery assembly

Abstract

The invention discloses a main-grid-free and anti-subcrack battery assembly. The main-grid-free and anti-subcrack battery assembly comprises main-grid-free battery pieces and copper wire meshes, wherein a plurality of transversal secondary grids are arranged on the front surfaces of the main-grid-free battery pieces; the copper wire meshes are formed by weaving a plurality of longitudinal copper wires and a plurality of transversal copper wires; the copper wire meshes cover the front surfaces of the longitudinally-arranged main-grid-free battery pieces; the copper wires of the copper wire meshes and the secondary grids of the main-grid-free battery pieces are welded at intersections to form battery strings; the plurality of battery strings are connected through bus bars into the battery assembly. The main-grid-free and anti-subcrack battery assembly uses the battery pieces without main grid structures, and the woven copper wire meshes and the secondary grids of a battery are directly intersected and welded. Through thousands of contacts between the woven copper wire meshes and the secondary grids of the battery, current conducting paths at subcrack and microcrack parts of a wafer are more optimized, so that loss caused by subcrack is greatly reduced and hot spot problems of the assembly can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of solar cell components, in particular to a busbar-free anti-crack cell component. Background technique [0002] With the rise of energy prices, the development and utilization of new energy has become the main topic of research in the field of energy. Because solar energy has the advantages of no pollution, no regional restrictions, and inexhaustible supply, the study of solar power generation has become the main direction for the development and utilization of new energy. The use of solar cells to generate electricity is a major way for people to use solar energy today. Traditional solar cells have electrode busbar structures on the front and back, especially the front electrode busbars will block part of the sunlight, reducing the overall cell conversion efficiency. Moreover, if the traditional busbar is welded with ribbon, the overall efficiency of the module will decrease rapidly once hidden cracks oc...

AI Technical Summary

Problems solved by technology

The use of solar cells to generate electricity is a major way for people to use solar energy today. Traditional solar cells have electrode busbar structures on the front and back, especially the front electrode busbars will block part of the sunlight, reducing the overall cell conversion efficiency. Moreover, if the traditional busbar is welded with ribbon, the overall efficiency of the module will decrease rapidly once hidden cracks occur in the module, and even cause the module to fail completely or be scrapped; in view of the above problems, conventional busbar cells using conventional ribbon connection structures need further Optimized design to reduce module loss and increase power generation of photovoltaic power generation systems

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