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A kind of welding method and hot melt adhesive

A welding method and hot melt adhesive technology are applied in the field of solar photovoltaic, which can solve the problems of easy displacement of the welding tape and inaccurate welding of the welding tape.

Active Publication Date: 2021-11-12
LONGI SOLAR TECH (TAIZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a welding method, which aims to solve the problem that the welding strip is prone to displacement during transmission to the welding station, resulting in inaccurate welding of the welding strip

Method used

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  • A kind of welding method and hot melt adhesive
  • A kind of welding method and hot melt adhesive
  • A kind of welding method and hot melt adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] refer to figure 1 , shows a flow chart of a welding method in Embodiment 1 of the present invention, which may specifically include the following steps:

[0043] Step 101 , forming a hot melt glue fixing point on the surface of the main grid electrode of the solar cell.

[0044] In the embodiment of the present invention, the main grid of the solar cell can be multi-bus or single bus, and the multi-bus solar cell can be a solar cell with the number of main grids greater than or equal to 2. In the embodiment of the present invention, This is not specifically limited. For example, the number of busbars of the solar battery sheet may be 3, or the number of busbars of the solar battery sheet may be 6, or the number of busbars of the solar battery sheet may be 20.

[0045] In the embodiment of the present invention, hot melt adhesive fixing points may be formed on the surface of the main grid electrode of the solar cell.

[0046] Specifically, hot melt glue fixing points ...

Embodiment 2

[0086] refer to figure 2 , figure 2 A flow chart of a welding method according to Embodiment 2 of the present invention is shown, which may specifically include the following steps:

[0087] Step 201, heating the hot melt adhesive to a first preset temperature threshold to reach a preset viscosity threshold.

[0088] In the embodiment of the present invention, the hot melt adhesive may be heated to a first preset temperature threshold, so that the hot melt adhesive reaches a preset viscosity threshold. Both the first preset temperature threshold and the preset viscosity threshold can be set according to actual needs, which are not specifically limited in this embodiment of the present invention.

[0089] For example, the first preset temperature threshold can be 90-150°C, that is, the hot melt adhesive can be heated to 90-150°C, so that the viscosity of the hot melt adhesive is 500-3000mPa·s (mPa·s, millipascal "second ).

[0090] In the embodiment of the present invention...

Embodiment 3

[0130] The embodiment of the present invention also discloses a hot melt adhesive, which may include: a first preset amount of adhesive, a second preset amount of wax, and a third preset amount of solvent.

[0131] Specifically, the composition of the hot-melt adhesive may include a first preset amount of adhesive, a second preset amount of wax, and a third preset amount of solvent by mass, and the adhesive may mainly act as a thickener The wax can play the role of lubricating and dispersing the cement, and at the same time, the wax can also soften or solidify the above-mentioned adhesive. The first preset serving size can be 1-20 servings, the second preset serving size can be 1-10 servings, or 2-20 servings, and the third preset serving size can be 60-90 servings. That is, in terms of mass, the hot melt adhesive may include: 1-20 parts of adhesive, 1-10 or 2-20 parts of wax, and 60-90 parts of solvent.

[0132] In the embodiment of the present invention, for the specific de...

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Abstract

The invention provides a welding method and hot-melt adhesive, which relate to the field of solar photovoltaic technology. The method includes: forming a hot-melt adhesive fixing point on the surface of a main grid electrode of a solar cell; cooling the heat of the hot-melt adhesive fixing point The melt adhesive is in a non-sticky state; move the solar cells equipped with non-stick hot-melt adhesive to a stringing machine in a heated state, so that the hot-melt adhesive softens and becomes sticky; through the sticky hot-melt Glue to fix the ribbon on the surface of the main grid electrode of the solar cell; through the stringer, the solder ribbon fixed on the surface of the main grid electrode of the solar cell is welded to the surface of the solar cell busbar electrode surface. The surface of the non-sticky hot-melt adhesive fixed point is smooth and non-sticky, which is convenient for the packaging and transportation of solar cells; the welding ribbon is fixed on the surface of the main grid electrode of the solar cell through the sticky hot-melt adhesive, which is convenient for precise welding belt; no additional modification to the stringer is required, and the welding cost is low.

Description

technical field [0001] The invention relates to the field of solar photovoltaic technology, in particular to a welding method and hot melt adhesive. Background technique [0002] Photovoltaic modules are usually formed by connecting and packaging multiple solar cells in series. A solar cell string is usually formed by welding multiple solar cells with ribbons. [0003] At present, the process of making solar cell strings is roughly as follows: arranging the ribbons on the solar cells according to the predetermined spacing, transferring the solar cells with the ribbons to the welding station, and welding the ribbons to the surface of the solar cells at the main gate electrode. [0004] In the process of studying the welding of the ribbon, the inventor found the following problem: During the transfer of the ribbon to the welding station, the ribbon is prone to displacement, so that there is a large displacement between the ribbon and the busbar electrode, resulting in the in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K37/00B23K37/04C09J101/14C09J101/28C09J129/14C09J161/02C09J191/06C09J193/04
Inventor 李华刘继宇郭梦龙童洪波
Owner LONGI SOLAR TECH (TAIZHOU) CO LTD
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