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Solar battery sheet array, and solar battery assembly and preparation method thereof

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

Active 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

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

Method used

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  • Solar battery sheet array, and solar battery assembly and preparation method thereof
  • Solar battery sheet array, and solar battery assembly and preparation method thereof
  • Solar battery sheet array, and solar battery assembly and preparation 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 battery sheet array, and a solar battery assembly and a preparation method thereof. The solar battery sheet array comprises multiple battery sheets which are arranged in the form of an n*m array; in the same row of battery sheets, adjacent battery sheets are connected through multiple conductive wires, at least two conductive wires are formed by metal wires extending between the surfaces of adjacent battery sheets in a reciprocating mode; and in adjacent two rows of battery sheets, one battery sheet in an a-th row and one battery sheet in an (a+1)th row are connected through multiple conductive wires, at least two conductive wires are formed by metal wires extending between the surface of the one battery sheet in the a-th row and the surface of the one battery sheet in the (a+1)th row in a reciprocating mode, the front surfaces of the battery sheets are provided with auxiliary grid wires and short grid wires, the auxiliary grid wires comprise intermediate auxiliary grid wires intersected with the conductive wires and edge auxiliary grid wires not intersected with the conductive wires, the short grid wires are connected with the edge auxiliary grid wires, and the short grid wires are connected with the conductive wires or at least one intermediate auxiliary grid wire.

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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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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