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Solar photovoltaic module and preparation method thereof

A solar photovoltaic and component technology, applied in photovoltaic power generation, electrical components, semiconductor devices, etc., can solve the problems of reducing the shading area of ​​the grid line on the front of the cell, reducing the current transmission resistance of the cell, etc., to reduce the area, reduce the production time, The effect of increasing the power of components

Active Publication Date: 2021-07-27
维科诚(苏州)光伏科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After many times of refraction and reflection of the sunlight irradiated on the gap position, some of the sunlight is bound to finally hit the outside of the module, and the cells on the market currently have busbars and thin gridlines. The commonly used method is to pass through The thin grid line collects the current and transmits the current through the main grid line. More efficient battery components put forward better requirements for the current transmission of the battery sheet. It is necessary to reduce the current transmission resistance of the front of the battery sheet and reduce the grid line The shading area, so the current transmission method commonly used in solar cells will not meet the requirements of more efficient battery components

Method used

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  • Solar photovoltaic module and preparation method thereof
  • Solar photovoltaic module and preparation method thereof
  • Solar photovoltaic module and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Such as Figure 4 As shown, the photovoltaic module 7 of this embodiment includes a front plate, a front encapsulation layer, a battery layer and a composite bottom plate 8 arranged in sequence from top to bottom, and the battery layer is formed by arranging a plurality of battery sheets 1 .

[0047] The solar cell sheet 1 of the present embodiment, as Figure 1-2 As shown, there is a back electrode 6 on the back, but there is no busbar on the front, and there are fine grid lines 4 on the front, and the fine grid lines 4 are densely meshed, and the distance between adjacent fine grid lines 4 is 1-2mm. The edge of the solar cell 1 is provided with a through groove 2 passing through its thickness direction and / or the inside of the solar cell 1 is provided with a through hole 3 passing through its thickness direction, and the through groove 2 and the through hole 3 are coated with an insulating material 9 .

[0048] Through-grooves 2 or through-holes 3 are regularly open...

Embodiment 2

[0058] This embodiment provides a method for preparing the solar photovoltaic module 7 described in Embodiment 1, which specifically includes the following steps:

[0059] 1) Select the battery sheet 1 with fine grid lines 4 and back electrodes 6 prepared, and open through grooves 2 and / or through holes 3 through its thickness direction.

[0060] The manufacturing method of the through groove 2 or the through hole 3 provided in this embodiment is to use laser and water to alternately cut the battery sheet 1 so that the battery sheet 1 is cut along the cutting path to form the through groove 2 or the through hole 3 . Cutting is performed with a laser and it is ensured that the battery sheet 1 is not disconnected after the laser cutting.

[0061] The parameters of the laser cutting in this embodiment are as follows: the laser power is 20W, the laser frequency is 600kHz, the laser running speed, that is, the moving speed of the laser is 22000cm / min, and the laser cutting time of ...

Embodiment 3

[0073] Such as Figure 5-7 As shown, the photovoltaic module 7 and the solar battery sheet 1 in this embodiment are basically similar to the first embodiment, the difference is that in this embodiment, the solar battery sheet 1 is not opened at the four corners and two of the sides. through the groove 2, so when the photovoltaic module 7 is prepared, the battery sheets 1 can only be connected to each other vertically to form a battery string, but cannot be connected horizontally.

[0074] The manufacturing method of the through-groove 2 and the through-hole 3 in this embodiment is basically similar to that of Embodiment 1, the difference is that in this embodiment, there are 12 busbars of the battery sheet 1, and the laser-cut The parameters are as follows: the laser power is 15W, the laser frequency is 500kHz, the laser running speed, that is, the moving speed of the laser is 18000cm / min, and the laser cutting time of the single cell 1 is 2s. The parameters of water cutting ...

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Abstract

The invention discloses a solar photovoltaic module, which comprises a front plate, an encapsulation layer, a battery layer and a composite bottom plate arranged sequentially from top to bottom, the battery layer includes at least one battery sheet, and the front side of the battery sheet has no main grid Lines, the front of the battery sheet has a thin grid line, the edge of the solar battery sheet is provided with a through groove penetrating through its thickness direction and / or the inside of the solar battery sheet is provided with a through hole penetrating its thickness direction, so The through-groove and the through-hole are filled with conductive material to form a front electrode, the front electrode is electrically connected to the fine grid wire, and the front electrode penetrates from the front of the solar cell to the back of the solar cell , the back side of the battery sheet is provided with a back electrode. In the solar photovoltaic module of the present invention, the front electrode of the cell is led to the back of the cell, and there is no space between the cells in series to parallel, which reduces the area of ​​the module and improves the power of the module.

Description

technical field [0001] The invention relates to the technical field of manufacturing solar cells, in particular to a solar photovoltaic module and a method for preparing the photovoltaic module. Background technique [0002] The solar photovoltaic power generation industry, due to its cleanliness, safety, convenience and high efficiency, has become an emerging industry that is widely concerned and focused on development around the world. [0003] With the continuous progress of solar energy technology, the rapid growth of large-scale system power stations, due to the continuous reduction of land resources available for photovoltaic power generation, the demand for high-efficiency crystalline silicon battery components continues to rise. In the future solar market development, photovoltaic power generation will mainly focus on high-efficiency crystalline silicon battery components. development and application. [0004] Currently on the market, the mainstream of solar cell mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/048H01L31/0224H01L31/18
CPCH01L31/022425H01L31/048H01L31/1804Y02E10/547Y02P70/50
Inventor 赵雷范维涛苏杨杨孙晨财徐长志张鑫程晶
Owner 维科诚(苏州)光伏科技有限公司
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