Photovoltaic module

Abstract

The invention provides a photovoltaic module, which comprises a plurality of photovoltaic cells sequentially arranged along a first direction and conductive pieces electrically connected with two adjacent photovoltaic cells, wherein bus electrodes extending along the first direction are arranged on the surfaces of the photovoltaic cells, the conductive piece includes a first port and a second portrespectively covering respective bus electrodes of two adjacent photovoltaic cells, and a length of at least one of the first port and the second port in a first direction is less than a half of a length of the bus electrodes in the first direction. According to the photovoltaic module, more reliable electrical connection between the adjacent photovoltaic cells is realized through the conductivepieces, the influence of the first parts and / or the second parts of the conductive pieces on the shading areas of the surfaces of the photovoltaic cells is reduced, the utilization rate of the photovoltaic module on solar radiation is improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of solar power generation, in particular to a photovoltaic module. Background technique [0002] The battery strings of traditional photovoltaic modules are electrically connected to adjacent battery sheets through solder ribbons, which connect the bus electrode on the front of one battery sheet to the bus electrode on the back of another adjacent battery sheet. Wherein, the length of the part of the above-mentioned welding ribbon connected to the bus electrode of the cell is basically equivalent to the length of the corresponding bus electrode. With the development of industrial technology, the width of the bus electrode of mainstream battery products is continuously reduced. In this case, the width of the above-mentioned welding strips also needs to be reduced. The requirements for alignment accuracy and welding strength are higher, and the requirements for material performance and process difficulty incre...

AI Technical Summary

Problems solved by technology

With the development of industrial technology, the width of the bus electrode of mainstream battery products is continuously reduced. In this case, the width of the above-mentioned welding strips also needs to be reduced. The requirements for alignment accuracy and welding strength are higher, and the requirements for material performance and process difficulty increase; And it may also cause the reduction of the light-receiving area on the surface of the cell

[0003] In addition, there is a gap of 2 to 4 mm between adjacent cells of the above-mentioned photovoltaic modules, and the irradiated energy in this part of the area is not used. Under the same power output specification, the size requirements of the corresponding photovoltaic modules are relatively large. Cause material waste and cost increase

In response to this point, the shingled module launched in the industry cancels the inter-sheet spacing of adjacent cells, and realizes the electrical connection of adjacent cells through conductive adhesives, without the need for welding ribbons. However, it also faces the high cost of conductive adhesive materials and is difficult to rework. And other issues

In addition, the edges of adjacent cells in the above-mentioned shingled components overlap each other, and the overlapping area also affects the actual light-receiving area and power output of a single cell.

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