Solar cell piece array, solar cell module and preparation method therefor

A technology for solar cells and solar cells, applied in the field of solar cells, can solve the problems of small conductive cross-sectional area and large resistance loss, and achieve the effects of reducing the number of metal wires, low cost, and simple preparation

Inactive Publication Date: 2016-12-07
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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.

Method used

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  • Solar cell piece array, solar cell module and preparation method therefor
  • Solar cell piece array, solar cell module and preparation method therefor
  • Solar cell piece array, solar cell module and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0117] 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.

[0118] 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.

[0119] 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 sheet array 30 includes a plurality of battery sheets 31 , adjacent battery sheets 31 are connected by a plurality of conductive wires 32 , and the front adhesive film layer 20 is in direct contact with the conductive wires 32 and filled between the adjacent conductive wires 32 .

[0120] In other words, the solar cell assembly 100 according to the embodiment of the present application includes a top...

example 1

[0144] Example 1 is used to illustrate an example of the solar cell module 100 of the present application and its manufacturing method.

[0145] (1) Preparation of wire S

[0146] 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.

[0147] (2) Preparation of solar cell module 100

[0148] 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 battery sheet 31 has 91 auxiliary grid lines (made of silver, with a width of 60 microns and a thickness of 9 microns), each auxiliary grid line basically runs through the battery sheet 31 in the longitudinal direction, and the distance between adjacent auxiliar...

example 2

[0156] Example 2 is used to illustrate an example of the solar cell module of the present application and its preparation method.

[0157] (1) Preparation of conductive wire

[0158] 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 micrometers, thereby making a conductive wire.

[0159] (2) Preparation of solar cell modules

[0160] 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 direct...

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Abstract

The invention discloses a solar cell piece array, a solar cell module and a preparation method therefor. The solar cell piece array comprises multiple cell pieces, wherein the adjacent cell pieces are connected through multiple conductive wires; the multiple conductive wires comprise metal wires; at least one metal wire extends in a reciprocating manner between the surface of one cell piece and the surface of the other cell piece of the adjacent cell pieces; and after the metal wire is welded with the corresponding cell pieces, the metal wire is broken in the fold-back position of the metal wire. According to the solar cell piece array provided by the embodiment of the invention, the conductive wires comprise the metal wires which extend in a reciprocating manner; the metal wire extend in a reciprocating manner between adjacent two cell pieces in a winding arrangement way to form a folded shape; the conductive wires with the structure are simple to manufacture and low in cost; and in addition, the photoelectric conversion efficiency of the solar cell piece array can be improved.

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 Applications(China)
IPC IPC(8): H01L31/05H01L31/0224H01L31/18
CPCY02E10/50Y02P70/50
Inventor 赵志强姜占锋何龙
Owner BYD CO LTD
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