Composite film for interconnection of main-grid-free heterojunction solar cell modules, and preparation method thereof

A technology of solar cells and composite films, applied in electrical components, circuits, photovoltaic power generation, etc., can solve the problems of low production efficiency, unsatisfactory use effect, and complicated production process.

Active Publication Date: 2021-05-11
无锡市联鹏新能源装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a composite film for the interconnection of heterojunction solar cell modules without busbars, which aims to solve the problem that the traditional composite film in the prior art needs to adopt a secondary melt casting process, the production process is complicated, and the cost is high And the structural form is single, resulting in technical problems of low production efficiency and unsatisfactory use effect

Method used

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  • Composite film for interconnection of main-grid-free heterojunction solar cell modules, and preparation method thereof
  • Composite film for interconnection of main-grid-free heterojunction solar cell modules, and preparation method thereof
  • Composite film for interconnection of main-grid-free heterojunction solar cell modules, and preparation method thereof

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Embodiment 1

[0036] combine figure 1 , figure 2 Shown is the first embodiment of a composite film for interconnection of busbar-free heterojunction solar cell modules and its preparation method according to the present invention. The composite film includes a composite film body and copper wires 3, and the composite film body includes a base A material layer 1 and an adhesive film layer 2, the adhesive film layer 2 is arranged on the base material layer 1, and several copper wires 3 are embedded in the adhesive film layer 2 along the adhesive film layer 2 in parallel.

[0037] In this embodiment, the substrate layer 1 is a PVDF film with a thickness of 0.01-0.2 mm. PVDF film contains related additives, such as light stabilizers, anti-ultraviolet agents, etc.

[0038] In this embodiment, the adhesive film layer 2 is a PUR adhesive film with a thickness of 0.01-0.2 mm. The PUR film also contains triacryl isocyanate, dibenzoyl peroxide, 2-hydroxy-4-n-octyloxybenzophenone and UV stabilizer...

Embodiment 2

[0046] The difference between the composite film of this embodiment and the first embodiment is that the substrate layer 1 is a circular hollow PVF film with a hollow structure with a thickness of 0.01-0.2 mm, and the PVF film contains related additives, such as light stabilizers , anti-ultraviolet agent, etc. The film layer 2 is an EVA film with a thickness of 0.01 to 0.2mm, and the EVA film also contains triacrylisocyanurate, dibenzoyl peroxide, and 2-hydroxy-4-n-octyloxydibenzoyl Ketone and UV light stabilizers.

[0047] combine image 3As shown, the preparation method of the composite membrane of the present embodiment comprises the following steps:

[0048] Step 1), use the winding tool to arrange the copper wires 3 whose length is longer than twice the width of the cell evenly and horizontally on the tooling and stretch them straight. The parallel distance between two adjacent copper wires 3 ranges from 2 to 20 mm. The overall width of the 3 rows is smaller than the c...

Embodiment 3

[0053] The difference between the composite film of this embodiment and the first embodiment is that the substrate layer 1 is a PET film with a thickness of 0.01-0.2 mm, and the PET film contains related additives, such as a light stabilizer, an anti-ultraviolet agent, and the like. The film layer 2 is a TPU film with a thickness of 0.01 to 0.2 mm, and the TPU film also contains triacrylisocyanate, dibenzoyl peroxide, and 2-hydroxy-4-n-octyloxybenzoyl Ketone and UV light stabilizers.

[0054] combine Figure 4 As shown, the preparation method of the composite membrane of the present embodiment comprises the following steps:

[0055] Step 1), use the winding tool to arrange the copper wires 3 whose length is longer than twice the width of the cell evenly and horizontally on the tooling and stretch them straight. The parallel distance between two adjacent copper wires 3 ranges from 2 to 20 mm. The overall width of the 3 rows is smaller than the cell width;

[0056] Step 2), o...

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Abstract

The invention discloses a composite film for interconnection of main-grid-free heterojunction solar cell modules. The composite film comprises composite film bodies and copper wires, each composite film body comprises a base material layer and an adhesive film layer, the adhesive film layer is arranged on the base material layer, and the copper wires are embedded in the adhesive film layer in parallel along the adhesive film layer. A preparation method of the composite film comprises the following steps: arranging and straightening the copper wires, putting a whole piece of one composite film body or cutting the whole piece of the composite film body into a slice film, putting the slice film on a pressing tool heating platform with the adhesive surface facing upwards, pressing the composite film body or the slice film with half of the copper wires, placing another whole piece of the composite film body or cutting the other whole piece of composite film body into a slice film with the adhesive surface facing downwards on the other half of the copper wire, closing the pressing tool, adjusting the pressing pressure and the pressing time, pressing the copper wires and the composite film bodies together to manufacture the required composite film, taking out the composite film, and cooling the composite film. The composite film is simple in manufacturing process, low in cost, diversified in structure and better in use effect, and the production efficiency can be improved.

Description

technical field [0001] The invention relates to a composite film for interconnection of heterojunction solar cell components without busbars and a preparation method thereof. Background technique [0002] Crystalline silicon heterojunction solar cells have the advantages of high conversion efficiency, high bifacial utilization rate, no light decay, low temperature coefficient, high weak light response, fewer process steps, and symmetrical structure. However, due to high technical threshold and high material cost, In particular, the cost of electrode silver paste restricts the rapid development of heterojunction. The electrode metallization uses low-temperature silver paste. Due to the high volume resistivity of the low-temperature silver paste after curing, enough silver paste must be printed to reduce the internal resistance of the grid line. The consumption of silver paste is high, which is several times that of ordinary crystalline silicon cells. [0003] The existing fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/05H01L31/18
CPCH01L31/0512H01L31/18Y02E10/50Y02P70/50
Inventor 熊军
Owner 无锡市联鹏新能源装备有限公司
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