CN109301018A

CN109301018A - Anti-snail photovoltaic module and its manufacturing method

Info

Publication number: CN109301018A
Application number: CN201811363237.0A
Authority: CN
Inventors: 陈海龙
Original assignee: Jiangsu Embellish Photovoltaic Wuxi Co Ltd
Current assignee: Jiangsu Embellish Photovoltaic Wuxi Co Ltd
Priority date: 2018-11-15
Filing date: 2018-11-15
Publication date: 2019-02-01

Abstract

The present invention provides a kind of anti-snail line photovoltaic module, mainly thes improvement is that, which successively includes: glass, the first EVA layer, photovoltaic cell mould group, the second EVA layer, PE layers, third EVA layer, backboard from front to the back side；The glass, the first EVA layer, photovoltaic cell mould group, the second EVA layer, PE layers, third EVA layer, backboard by lamination connection.Further, the photovoltaic module edge is equipped with frame.Further, terminal box is installed on the photovoltaic module.Further, PE layers with a thickness of 0.08~0.12m.The present invention can reduce or prevent the generation of snail line, improve the reliable property amount of photovoltaic module, prolong the service life.

Description

Anti- snail line photovoltaic module and its manufacturing method

Technical field

The present invention relates to a kind of photovoltaic module, especially a kind of anti-snail line photovoltaic module.

Background technique

Photovoltaic crystal silicon component is the module that electric energy is converted light energy by crystal silicon semiconductor, photovoltaic crystal silicon component mesh Before be widely used in the fields such as large-scale ground power station, roofing, ship, aviation.

When photovoltaic crystal silicon component is applied in the project of power station, component will cause crack in production, transport, installation, As the lengthening and the alternating of various adverse circumstances, steam that use the time can penetrate into EVA adhesive film, make its decomposition, decomposition Substance can be penetrated into photovoltaic cell surface and photovoltaic cell PN junction by battery crackle from the back side and surface silver electrode occurs instead It answers, and then cell piece cracks is caused to form the trace that similar snail gets over.

There are snail line phenomenons in power station for photovoltaic module, will affect the appearance and power of component, power is in several years As many as interior decaying 5%, solves snail line phenomenon, becomes photovoltaic plant construction matter of utmost importance.

Solve the problems, such as snail line, need to solve cell piece crack in component transportational process or backboard it is permeable after EVA Hydrolysis problem, master are to solve the permeable problem of backboard.

Current method is not use EVA to encapsulate, and is packaged using PVB or transparent silica gel technique to photovoltaic cell, but The applicable range of the method is relatively narrow, puts into equipment etc. more demanding.

Summary of the invention

It is an object of the present invention to overcome the shortcomings of the prior art and provide a kind of anti-snail line photovoltaic module and its Manufacturing method improves the reliable property amount of photovoltaic module, prolongs the service life to reduce or prevent the generation of snail line.This Invention the technical solution adopted is that:

A kind of anti-snail line photovoltaic module, mainly thes improvement is that, the anti-snail line photovoltaic module is from front to back Face successively includes: glass, the first EVA layer, photovoltaic cell mould group, the second EVA layer, PE layers, third EVA layer, backboard；

The glass, the first EVA layer, photovoltaic cell mould group, the second EVA layer, PE layers, third EVA layer, backboard pass through lamination Connection.

Further, the photovoltaic module edge is equipped with frame.

Further, terminal box is installed on the photovoltaic module.

Further, PE layers with a thickness of 0.08~0.12m.

Further, PE layers with a thickness of 0.1mm.

Further, the first EVA layer with a thickness of 0.5mm；Second EVA layer with a thickness of 0.3mm；The thickness of third EVA layer Degree is 0.3mm.

A kind of production method of anti-snail line photovoltaic module, comprising:

Multiple photovoltaic cells are successively welded into battery strings by concatenating band first；Between the piece and piece of photovoltaic cell There are gaps；

Then flat glass in the production line；

The first EVA layer is laid on glass；

Then each battery strings are just being subjected to typesetting facing towards glass, also there are gaps between each battery strings；Using busbar The string of battery strings is attached with string, forms photovoltaic cell mould group；

Then the second EVA layer is laid at the photovoltaic cell mould group back side；

PE layers are laid on the second EVA layer；

Continue to be laid with third EVA layer on PE layers；

Then it is laid with backboard at the third EVA layer back side, is then laminated photovoltaic module to be laminated by laminating machine；

After lamination, installation frame subsequent technique is carried out, the finished product of photovoltaic module is obtained.

Further, subsequent technique further includes that terminal box is installed on photovoltaic module.

Further, PE layers with a thickness of 0.08~0.12m.

Further, PE layers with a thickness of 0.1mm.

The present invention has the advantages that

1) the anti-snail line of the photovoltaic module, power is undamped, has prevented the generation of snail line problem.

2) quality and service life of photovoltaic module are improved.

3) photovoltaic module presentation quality is stablized.

Detailed description of the invention

Fig. 1 is common photovoltaic component structure diagram.

Fig. 2 is the production flow diagram of common photovoltaic module.

Fig. 3 is anti-snail line photovoltaic module structure schematic diagram of the invention.

Fig. 4 is anti-snail line photovoltaic module production flow diagram of the invention.

Specific embodiment

Below with reference to specific drawings and examples, the invention will be further described.

As shown in Figure 1 and Figure 2, the manufacture craft of common photovoltaic module includes:

Multiple photovoltaic cells 31 are successively welded into battery strings by concatenating band first；Tin-coated copper can be used in concatenation band Band；There are the gaps of 2~3mm between the piece and piece of photovoltaic cell 31；

Then flat glass 1, the glass are used for photovoltaic module front protecting in the production line；

Be laid with the first EVA layer 2 on glass 1, the first EVA layer 2 with a thickness of 0.5mm；

Then each battery strings are just being subjected to typesetting facing towards glass 1, also there are the gaps of 2~3mm between each battery strings；It adopts The string of battery strings is attached with string with busbar, forms photovoltaic cell mould group 3；

Then the photovoltaic cell mould group back side be laid with the second EVA layer 4, the second EVA layer with a thickness of 0.5mm；

Then it is laid with backboard 7 at the back side of the second EVA layer, photovoltaic module to be laminated is then subjected to layer by laminating machine Pressure；

After lamination, the subsequent techniques such as installation frame, terminal box are carried out, the finished product of photovoltaic module is obtained.

The photovoltaic module that the technique is formed, will cause crack in production, transport, installation, with the lengthening for using the time With the alternating of various adverse circumstances, steam can be penetrated into the EVA adhesive film of the second EVA layer, make its decomposition, and the substance of decomposition can lead to It crosses battery crackle and penetrates into photovoltaic cell surface from the back side.

As shown in Figure 3, Figure 4, the manufacture craft of anti-snail line photovoltaic module proposed by the present invention includes:

Then 3 back side of photovoltaic cell mould group be laid with the second EVA layer 4, the second EVA layer with a thickness of 0.3mm；

On the second EVA layer 4 be laid with PE layer 5, PE layer 5 with a thickness of 0.08~0.12mm, preferably 0.1mm；PE material It is the abbreviation of polyethylene；

Continue on PE layer 5 be laid with third EVA layer 6, third EVA layer with a thickness of 0.3mm；

Then it is laid with backboard 7 at 6 back side of third EVA layer, photovoltaic module to be laminated is then subjected to layer by laminating machine Pressure；

Using identical photovoltaic cell, glass, frame, EVA material, one piece of finished product is respectively made according to above two technique The test of snail line is carried out, test condition, 85 DEG C of+85% humidity+1000h, test result is as follows:

The photovoltaic module of common process snail line experiment test after, show its transfer efficiency reduction, power attenuation- 3.3%, decay nearly 8W, and snail line occurs in appearance, and anti-snail line effect is poor.

The photovoltaic module of anti-snail line technique, its appearance is unchanged after the test of snail line, and power is undamped, shows it Superior anti-snail line performance has basically reached zero snail line effect.

In above table, Pmax maximum power, RsVoc open-circuit voltage, RsIsc short circuit current, RsVpm maximum power point electricity Pressure, RsIpm maximum power point electric current.

It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it, Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover In the scope of the claims of the present invention.

Claims

1. an anti-snail pattern photovoltaic module, it is characterized in that, this anti-snail pattern photovoltaic module comprises sequentially from front to back: glass, the first EVA layer, photovoltaic cell module, the second EVA layer, the PE layer, the third EVA layer, backplane;

The glass, the first EVA layer, the photovoltaic cell module, the second EVA layer, the PE layer, the third EVA layer, and the backplane are connected by lamination.

2. The anti-snail photovoltaic module of claim 1, wherein

A frame is installed on the edge of the photovoltaic module.

3. The anti-snail photovoltaic module of claim 1, wherein

A junction box is installed on the photovoltaic module.

4. The anti-snail photovoltaic module of claim 1, wherein

The thickness of the PE layer is 0.08-0.12m.

5. The snail-resistant photovoltaic module of claim 4, wherein

The thickness of the PE layer is 0.1 mm.

6. The anti-snail photovoltaic module of claim 1, wherein

The thickness of the first EVA layer is 0.5 mm; the thickness of the second EVA layer is 0.3 mm; the thickness of the third EVA layer is 0.3 mm.

7. A method for making an anti-snail photovoltaic module, comprising:

First, a plurality of photovoltaic cells are welded into battery strings in sequence through a series connection tape; there are gaps between the photovoltaic cells;

Then lay the glass flat on the production line;

Lay the first EVA layer on the glass;

Then, the front side of each battery string faces the glass for typesetting, and there are gaps between the battery strings; the strings of the battery strings are connected by bus bars to form a photovoltaic cell module;

Then lay a second EVA layer on the back of the photovoltaic cell module;

Lay a PE layer on the second EVA layer;

Continue to lay the third EVA layer on the PE layer;

Then a back sheet is laid on the back of the third EVA layer, and then the photovoltaic modules to be laminated are laminated by a laminating machine;

After the lamination is completed, the subsequent process of installing the frame is carried out to obtain the finished photovoltaic module.

8. The method for making an anti-snail photovoltaic module according to claim 7, wherein,

Subsequent processes also include installing junction boxes on the photovoltaic modules.

9. The method for manufacturing an anti-snail photovoltaic module according to claim 7, wherein,

The thickness of the PE layer is 0.08-0.12m.

10. The method for making an anti-snail photovoltaic module according to claim 9, wherein,

The thickness of the PE layer is 0.1 mm.