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

A technology for solar cells and battery sheets, 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 not being limited by space, low cost, and small space

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

However, the role of the ribbon, main grid and auxiliary grid is to conduct current. From the perspective of resistivity, the thinner the solder ribbon, main grid and auxiliary grid, the smaller the conductive cross-sectional area and the greater the resistance loss.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0058] In the preparation process of the solar cell assembly 100, the conductive wire can be bonded with the sub-grid line 312 on the front side of one battery sheet 31 and the back electrode 314 on the back side of another adjacent battery sheet 31 with conductive glue to form a battery. sheet array 30 , and then stack and laminate the upper cover plate 10 , the front adhesive film layer 20 , the battery sheet array 30 , the back adhesive film layer 40 and the back sheet 50 to obtain the solar cell module 100 .

[0059] 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.

[0060] Specifically, the solar battery slice array 30 according to the embodiment of the present application includes a plurality of battery slices 31 . Adjacent battery sheets 31 are connected by a plurality of conductive wires 32 . The plurality of conductive wires 32 are composed of metal wires S extending back and ...

example 1

[0121] Example 1 is used to illustrate an example of the solar cell module 100 of the present application and its manufacturing method.

[0122] (1) Preparation of wire S

[0123] Attach a layer of epoxy resin conductive glue on the surface of the copper wire, wherein the cross-sectional area of ​​the copper wire is 0.04mm 2, the thickness of the epoxy resin conductive adhesive is 16 μm, thereby making the metal wire S.

[0124] (2) Preparation of solar cell module 100

[0125] 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 auxilia...

example 2

[0131] (1) Preparation of wire S

[0132] Attach a layer of acrylate conductive glue on the surface of the copper wire, wherein the cross-sectional area of ​​the copper wire is 0.03mm 2 , the thickness of the acrylate conductive adhesive is 10 μm, thereby making the metal wire S.

[0133] (2) Preparation of solar cell modules

[0134] 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 lines The distance between the auxiliary grid lines is 1.7 mm, and the back of the battery sheet 31 is provided with 5 back electrodes (the mater...

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Abstract

The invention discloses a solar battery assembly and a preparation method thereof, and a solar battery unit. The solar battery assembly comprises an upper cover plate, a front-surface adhesive film layer, a battery sheet array, a back-surface adhesive film layer and a backboard which are successively superposed, wherein the battery sheet array comprises multiple battery sheets, adjacent battery sheets are connected through multiple conductive wires, the conductive wires are formed by metal wires extending between the surfaces of adjacent battery sheets in a reciprocating mode, the metal wires comprise metal wire bodies and conductive adhesives wrapping the outer layer of the metal wire bodies, the conductive wires are in contact with the battery sheets, and the front-surface adhesive film layer is in direct contact with the metal wires and fills the portion between adjacent conductive wires. According to the solar battery assembly provided by the embodiments of the invention, the front-surface adhesive film layer is in direct contact with the metal wires and fills the portion between adjacent conductive wires, such that the conductive wires can be effectively insulated from external air, steam and the like, the conductive wires are prevented from oxidation, and the photoelectric conversion efficiency can be effectively guaranteed.

Description

technical field [0001] The present application relates to the field of solar cells, in particular to solar cells, solar cell components and their preparation methods. Background technique [0002] Solar cell modules are one of the important components of solar power generation devices. Sunlight shines on the battery sheet from the front of the battery sheet. The auxiliary grid line and the main grid line are arranged on the front side of the battery sheet, and then the current is drawn out by covering the welding strip welded on the main grid line. The welding strip, the main grid line and the auxiliary grid line The grid lines cover a part of the front side of the battery sheet, thus blocking part of the sunlight, and the solar energy shining on the ribbon, main grid lines and auxiliary grid lines cannot be converted into electrical energy. Therefore, solder ribbons, main grid lines and auxiliary grid lines are required The thinner the grid, the better. However, the role ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/05H01L31/18
CPCY02E10/50Y02P70/50
Inventor 赵志强康淑萍姜占锋何龙
Owner BYD CO LTD
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