Solar cell array, solar cell module and manufacturing method thereof

A technology for solar cells and solar cells, applied in the field of solar cells, can solve the problems of large resistance, long current path, affecting the photoelectric conversion efficiency of solar cell modules, etc., and achieve the effects of high efficiency, low cost, and high photoelectric conversion efficiency.

Active Publication Date: 2018-02-09
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This connection method has a long current path, high resistance, and is prone to false soldering, which affects the photoelectric conversion efficiency of the solar cell module.

Method used

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  • Solar cell array, solar cell module and manufacturing method thereof
  • Solar cell array, solar cell module and manufacturing method thereof
  • Solar cell array, solar cell module and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0128] During the preparation process of the solar cell module 100 , the conductive wire can be welded to the auxiliary grid line and the back electrode of the battery sheet 31 first, and then the various layers are stacked and laminated.

[0129] Other components of the solar cell assembly 100 according to the present application may be known in the art, and will not be repeated here.

[0130] Specifically, the solar cell module 100 includes an upper cover plate 10 , a front adhesive film layer 20 , a cell array 30 , a rear adhesive film layer 40 and a back sheet 50 . The battery slice array 30 includes a plurality of battery slices 31, adjacent battery slices 31 are connected by a plurality of conductive wires 32, at least two conductive wires 32 are formed by metal wires S reciprocatingly extending between the surfaces of adjacent battery slices, The conductive wires 32 are welded to the auxiliary grid wires, and the front adhesive film layer 20 is in direct contact with th...

example 1

[0155] Example 1 is used to illustrate an example of the solar cell module 100 of the present application and its manufacturing method.

[0156] (1) Preparation of wire S

[0157] Attach a layer of Sn40%-Bi55%-Pb5% alloy layer (melting point is 125 ℃) on the surface of the copper wire, wherein the cross-sectional area of ​​the copper wire is 0.04mm 2 , the thickness of the alloy layer is 16 μm, thereby making a wire S.

[0158] (2) Preparation of solar cell module 100

[0159] Provide a POE film layer with a size of 1630×980×0.5mm (melting temperature is 65°C), and accordingly provide a glass plate with a size of 1633×985×3mm and 60 pieces of polycrystalline silicon cells with a size of 156×156×0.21mm Tablet 31. The front side of the battery sheet 31 has 91 auxiliary grid lines (the material is silver, the width is 60 microns, and the thickness is 9 microns), each auxiliary grid line basically runs through the battery sheet 31 in the longitudinal direction, and between adja...

example 2

[0171] Example 2 is used to illustrate an example of the solar cell module of the present application and its preparation method.

[0172] (1) Preparation of wire S

[0173] Attach a layer of Sn40%-Bi55%-Pb5% alloy layer (melting point is about 125°C) on the surface of the copper wire, wherein the cross-sectional area of ​​the copper wire is 0.03mm 2 , the thickness of the alloy layer is 10 μm, thereby producing a wire S.

[0174] (2) Preparation of solar cell modules

[0175] Provide an EVA film layer with a size of 1630×980×0.5mm (melting temperature is 60°C), a glass plate with a size of 1633×985×3mm and 60 pieces of polycrystalline silicon cells 31 with a size of 156×156×0.21mm. The light-receiving surface of the battery sheet 31 is provided with 91 auxiliary grid lines (the material is silver, the width is 60 microns, and the thickness is 9 microns), and each auxiliary grid line basically runs through the battery sheet 31 in the longitudinal direction, and two adjacent ...

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Abstract

The invention discloses a solar cell unit, a solar battery cell array, a solar cell module and a fabrication method of the solar cell module. The solar cell unit comprises a battery cell and a plurality of conductive wires, wherein the battery cell comprises a battery cell substrate and a plurality of auxiliary grid lines, the plurality of auxiliary grid lines are arranged on a front surface of the battery cell substrate, the plurality of conductive wires are arranged at intervals, intersect with the auxiliary grid lines and are connected with the auxiliary grid lines, at least one auxiliary grid line is provided with at least one disconnection part, and the disconnection part is arranged between adjacent conductive wires. In the solar cell unit according to the embodiment of the invention, the disconnection part is arranged on the at least one auxiliary grid line between adjacent conductive wires, namely, at least one auxiliary grid line between adjacent conductive wires is broken, the silver paste or other materials for fabricating the auxiliary grid lines are not needed to be printed at a disconnection position, thus, the usage amount of the materials for fabricating the auxiliary grid lines can be reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a solar cell array, a solar cell module and a preparation method thereof. Background technique [0002] Solar cell modules are one of the important components of solar power generation devices. Sunlight enters the battery from the front of the cell body, and the front main grid and sub grid will block part of the cell body, and the light energy shining on the electrodes cannot be converted into electrical energy. Therefore, the thinner the main grid and the sub grid, the better. . However, the function of the main grid and the auxiliary grid is to conduct current. From the perspective of resistivity, the thinner the main grid and the auxiliary grid, the smaller the conductive cross-sectional area and the greater the resistance loss. Therefore, the design of the main gate and the sub-gate is to strike a balance between shading and conduction, and at the same time, cost should be consi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0224H01L31/18H01L31/05H01L31/0475
CPCY02E10/50Y02P70/50
Inventor 赵志强王立国田野康淑萍姜占锋何龙
Owner BYD CO LTD
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