Photovoltaic module

A photovoltaic module and solder joint technology, applied in the field of solar cells, can solve problems such as low efficiency of photovoltaic modules, and achieve the effects of reducing size, reducing shading, and reducing the impact of efficiency

Pending Publication Date: 2022-03-29
ZHEJIANG JINKO SOLAR CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The application provides a photovoltaic module, which is used to solve the problem of low efficiency of photovoltaic modules

Method used

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Embodiment Construction

[0041] In order to better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0042] It should be clear that the described embodiments are only some of the embodiments of the present application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0043] Terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of this application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0044] It should be understood that the term "and / ...

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Abstract

The photovoltaic module comprises a substrate provided with grid lines, the grid lines comprise main grids and auxiliary grids, the main grids intersect with the multiple auxiliary grids, the main grids are welded to welding spots of the substrate through welding wires, the first welding spots are located at the two opposite ends of the main grids, and the second welding spots are located between the adjacent first welding spots. The diameter of the welding wire is x, the length of the second welding spot is y, the width of the second welding spot is z, and x, y and z meet the following functions that y is larger than or equal to 1.15 * (1.3 x + 0.19) and larger than or equal to 0.85 * (1.3 x + 0.19), and z is larger than or equal to 1.2 * (0.993x + 0.143) and larger than or equal to 0.8 * (0.993x + 0.143). By optimizing the diameter of the welding wire and the size of the second welding spot, the size of the second welding spot can be reduced under the condition that the second welding spot has enough connection strength, so that the shielding of the second welding spot on the surface of the substrate is reduced, the influence of the second welding spot on the light absorption efficiency of the substrate is reduced, and the actual use requirement is better met.

Description

technical field [0001] The present application relates to the technical field of solar cells, in particular to a photovoltaic module. Background technique [0002] With the development of technology, photovoltaic devices such as solar cells are more and more widely used. Grid lines for collecting current are printed on the surface of silicon wafers, and the grid lines are welded to silicon wafers through solder joints and welding wires. part of the surface of the sheet. Contents of the invention [0003] The present application provides a photovoltaic module, which is used to solve the problem of low efficiency of the photovoltaic module. [0004] An embodiment of the present application provides a photovoltaic module, which includes: [0005] a substrate, and a passivation layer on at least one surface of the substrate; [0006] a grid line, the grid line is arranged on the surface of the substrate, the grid line includes a main grid and a sub-grid, and the main grid i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/02H01L31/0224
CPCH01L31/02008H01L31/022425
Inventor 黄世亮郭志球郝国晖张宁波
Owner ZHEJIANG JINKO SOLAR CO LTD
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