CN211789042U

CN211789042U - Lower packaging adhesive film and photovoltaic module adopting same

Info

Publication number: CN211789042U
Application number: CN201922093909.7U
Authority: CN
Inventors: 申海平; 刘振阳; 张凌翔; 冯均; 叶传建
Original assignee: Taizhou Lerri Solar Technology Co Ltd
Current assignee: Taizhou Longi Solar Technology Co Ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-10-27
Anticipated expiration: 2029-11-28

Abstract

The utility model relates to a lower encapsulation glued membrane and adopt this photovoltaic module of lower encapsulation glued membrane, the encapsulation glued membrane sets up between backplate and the battery piece in photovoltaic module down, the encapsulation glued membrane is provided with flower type opening down, flower type opening includes a first opening and at least three edge the second opening of the geometry center of first opening to the rectangular shape of dispersing all around, wherein, each a tip of first opening with the second opening intercommunication. The utility model discloses can effectively solve the perk of lead-out wire department of bending, reduce the risk of the scarce glue and bubble that lead-out wire department of bending exists, improve photovoltaic module's joint strength.

Description

Lower packaging adhesive film and photovoltaic module adopting same

Technical Field

The utility model belongs to the technical field of photovoltaic module, concretely relates to encapsulation glued membrane and adopt this photovoltaic module of encapsulation glued membrane down.

Background

The existing photovoltaic module comprises a glass cover plate, a battery piece, a leading-out wire, a back plate and a junction box, wherein the glass cover plate, the battery piece and the back plate are sequentially stacked, and packaging is realized through a lower packaging adhesive film. The back plate is provided with an opening, so that the outgoing line can be led out conveniently, one end of the outgoing line is connected to the battery piece, and the other end of the outgoing line is connected to the junction box.

The lead-out wire generally adopts horizontal L type welded structure, vertical I type bending structure, and two kinds of modes all have certain drawback. The horizontal L-shaped welding structure is not beneficial to realizing automation, the hidden cracking risk of the battery piece is high, and the operation difficulty is high; in the vertical I-shaped bending structure, a round hole or a square hole needs to be formed in the surface of the back plate, and a corresponding lower packaging adhesive film needs to be provided with a II-shaped hole or a cross-shaped hole. The lower packaging adhesive film is difficult to open an II-shaped hole for leading out a wire, the lower packaging adhesive film is provided with a rice-shaped hole, and the bending part of the leading-out wire is easy to have the defects of glue shortage, air bubbles and the like, so that the reliability of the photovoltaic module is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a lower encapsulant film and a photovoltaic module using the same to solve the above-mentioned problems in the background art.

In the first aspect, the utility model provides a technical proposal that a lower packaging adhesive film is arranged between a back plate and a battery piece in a photovoltaic module,

the lower packaging adhesive film is provided with a flower-shaped opening, the flower-shaped opening comprises a first opening and at least three strip-shaped second openings which are dispersed along the geometric center of the first opening to the periphery,

one end of each first gap is communicated with the second gap.

The utility model discloses can effectively solve the perk of lead-out wire department of bending, reduce the risk of the scarce glue and bubble that lead-out wire department of bending exists, improve photovoltaic module's joint strength.

Preferably, the photovoltaic module further comprises an outgoing line, one end of the outgoing line is connected with the battery piece, the other end of the outgoing line penetrates through the flower-shaped opening,

the maximum length corresponding to the outline of the first notch is smaller than the width of the outgoing line.

Preferably, the first gap has a circular profile.

Preferably, 8 second gaps are arranged in the flower-shaped opening, and each second gap is symmetrical with respect to the geometric center of the first gap.

In a second aspect, the present invention provides a photovoltaic module comprising the lower encapsulant film of any one of the first aspect.

Preferably, the photovoltaic module also comprises a leading-out wire, a junction box, a battery piece, a back plate and a glass cover plate, wherein the glass cover plate, the battery piece and the back plate are sequentially laminated from top to bottom,

an upper packaging adhesive film is arranged between the glass cover plate and the battery piece and is connected with the glass cover plate and the battery piece,

the lower packaging adhesive film is arranged between the battery piece and the back plate and is connected with the battery piece and the back plate, the back plate is provided with a first opening, the lower packaging adhesive film is provided with a flower-shaped opening,

one end of the outgoing line is connected with the battery piece, and the other end of the outgoing line penetrates through the first opening and the flower-shaped opening and is connected to the junction box.

Preferably, when the battery piece is connected with the back plate, the position of the first opening corresponds to the position of the flower-shaped opening.

The utility model discloses a photovoltaic module can effectively solve the perk of lead-out wire department of bending, reduces the risk of the scarce glue and bubble that lead-out wire department of bending exists, improves photovoltaic module's joint strength.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic view of a prior art leader passing through a rice-shaped opening;

FIG. 2 is a schematic view of a cross-shaped opening of a lower encapsulant film in the prior art;

FIG. 3 is a schematic view of a prior art photovoltaic module construction;

FIG. 4 is a schematic view of a flower-shaped opening of the middle and lower packaging adhesive film of the present invention;

fig. 5 is a schematic structural view of the photovoltaic module of the present invention.

In fig. 1-5, 1, a back plate, 11, a first opening, 2, a lower packaging adhesive film, 21, a flower-shaped opening, 211, a first opening, 212, a second opening, 22, a cross-shaped opening, 3, a lead wire, 4, a battery piece, 5, an upper packaging adhesive film, 6, and a glass cover plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

In a first aspect:

referring to fig. 3 and 5, a lower encapsulant film 2 is disposed between a back sheet 1 and a cell sheet 4 in a photovoltaic module.

Referring to fig. 4, the lower encapsulant film 2 is provided with a patterned opening 21, where the patterned opening 21 includes a first opening 211 and at least three second openings 212 in the shape of an elongated strip that diverges circumferentially along the geometric center of the first opening 211, and an end of each second opening 212 is in communication with the first opening 211.

Referring to fig. 5, the photovoltaic module further includes a lead-out wire 3. The back plate 1 is provided with a first opening 11, when the back plate 1 is connected with the battery piece 4, the position of the first opening 11 of the back plate 1 corresponds to the position of the flower-shaped opening 21 of the lower packaging adhesive film 2, so that the leading-out wire 3 can conveniently penetrate through the first opening 11 of the back plate 1 and the flower-shaped opening 21 of the lower packaging adhesive film 2. One end of the lead wire 3 is connected to the battery sheet 4, and the other end of the lead wire 3 passes through the first opening 11 and the flower-shaped opening 21.

Referring to fig. 2 and 3, in the prior art, a m-shaped opening 22 is formed in the lower packaging adhesive film 2, and as shown in fig. 1, a state in which the lead wires 3 pass through the m-shaped opening 22 is shown. When the back plate 1 is connected with the battery piece 4, the position of the first opening 11 of the back plate 1 corresponds to the position of the rice-shaped opening 22 of the lower packaging adhesive film 4.

When the assembly of the back plate 1, the battery piece 4 and the lower packaging adhesive film 2 is laminated, the lead-out wire 3 can tilt at the bending position due to poor self-plasticity of the lead-out wire 3 and small thickness of the back plate 1, and the bending position is difficult to be flattened by an auxiliary tool; when the outgoing line 3 passes through the opening 22 shaped like a Chinese character 'mi', a triangular area (a or B) needs to be opened, and then the outgoing line passes through the lower packaging adhesive film 2. The bending part of the outgoing line 3 enables the area A or the area B of the lower packaging adhesive film 2 to be correspondingly bent, so that the area A or the area B cannot be tiled between the back plate 1 and the battery piece 4, and the risk of glue shortage and air bubbles exists.

The utility model discloses a lower encapsulation glued membrane 2 sets up flower type opening 21, and this flower type opening 21 includes a first opening 211 and at least three second opening 212, and a tip and the first opening 211 intercommunication of each second opening 212.

The auxiliary tool flattens the bending part of the outgoing line 3 through the first notch 211, and eliminates the tilting part of the outgoing line 3; when the lead-out wire 3 passes through the flower-shaped opening 21, a different region (C or D) needs to be opened, as can be seen from the comparison between FIG. 2 and FIG. 4: the area C is smaller than the area A; the D area is smaller than the B area, and when the bending part of the outgoing line 3 enables the C or D area of the lower packaging adhesive film 2 to be bent, the adhesive shortage and air bubble risks between the back plate 1 and the battery piece 4 are reduced, and the connection strength of the back plate 1 and the battery piece 4 is improved.

The utility model discloses an among the preferred embodiment, the maximum length that the profile of first opening 211 corresponds is less than the width of lead-out wire 3, is favorable to increasing the area of laying of encapsulating glued membrane 2 down between backplate 1 and the battery piece 4, improves photovoltaic module's joint strength.

The utility model discloses an in an preferred embodiment, the profile of first breach 211 is circular, and the flower type opening 21 processing of encapsulation glued membrane 2 is convenient down, reduces manufacturing cost, improves production efficiency.

In a preferred embodiment of the present invention, the flower-shaped opening 21 of the lower encapsulant film 2 is provided with 8 second openings 212, and each second opening 212 is symmetrical with respect to the geometric center of the first opening 211.

As shown, the 8 second slits 212 in the shape of slender strips are: a second gap a, a second gap b, a second gap c, a second gap d, a second gap e, a second gap f, a second gap g and a second gap h, wherein one end parts of the second gap a, the second gap b, the second gap c, the second gap d, the second gap e, the second gap f, the second gap g and the second gap h are communicated with the first round gap 211.

The second gap a, the second gap b, the second gap c, the second gap d, the second gap e, the second gap f, the second gap g, and the second gap h are all symmetric about the center of the first gap 211. This structural design is reasonable, increases the export on the encapsulation glued membrane 2 down, makes things convenient for lead-out wire 3 to wear out from encapsulation glued membrane 2 down, reduces because of the unexpected hidden problem of splitting of photovoltaic module that leads to of wearing out of lead-out wire 3.

In a second aspect:

a photovoltaic module comprising the lower encapsulant film 2 of any one of the first aspects.

As shown in fig. 5, the photovoltaic module further includes a lead wire 3, a junction box (not shown), a back sheet 1, a battery sheet 4 and a glass cover plate 6.

The glass cover plate 6, the battery piece 4 and the back plate 1 are sequentially stacked from top to bottom. The upper packaging adhesive film 5 is positioned between the battery piece 4 and the glass cover plate 6 and is used for connecting the battery piece 4 and the glass cover plate 6; the lower packaging adhesive film 2 is positioned between the back plate 1 and the battery piece 4 and is used for connecting the back plate 1 and the battery piece 4.

Lower encapsulation glued membrane 2 sets up flower type opening 21, and backplate 1 sets up first opening 11, and when backplate 1 and battery piece 4 are connected, the position of the first opening 11 of backplate 1 and the flower type opening 21 position of lower encapsulation glued membrane 2 are corresponding, and the lead-out wire 3 of being convenient for passes the first opening 11 of backplate 1 and the flower type opening 21 of lower encapsulation glued membrane 2, and the one end of lead-out wire 3 is connected at battery piece 4, and the other end of lead-out wire 3 is connected at the terminal box.

The above embodiments are merely illustrative of the technical solutions of the present invention and not restrictive, and although the present invention is described in detail with reference to the embodiments, those skilled in the art should understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A lower packaging adhesive film, which is arranged between a back plate and a battery piece in a photovoltaic module,

it is characterized in that the lower packaging adhesive film is provided with a flower-shaped opening, the flower-shaped opening comprises a first opening and at least three strip-shaped second openings which are dispersed along the geometric center of the first opening to the periphery,

one end of each first gap is communicated with the second gap.

2. The bottom encapsulant film as claimed in claim 1, wherein the photovoltaic module further comprises a lead wire, one end of the lead wire is connected to the cell sheet, and the other end of the lead wire passes through the patterned opening,

3. The bottom encapsulant film as claimed in claim 1, wherein the first opening has a circular shape.

4. The lower encapsulant film as claimed in claim 1, wherein the flower-shaped opening has 8 second openings, and each of the second openings is symmetrical with respect to the geometric center of the first opening.

5. A photovoltaic module comprising the lower encapsulant film of any one of claims 1 to 4.

6. The photovoltaic module according to claim 5, further comprising a lead wire, a junction box, a cell, a back sheet and a glass cover plate, wherein the glass cover plate, the cell and the back sheet are sequentially laminated from top to bottom,

7. The photovoltaic module according to claim 6, wherein the first openings are located at positions corresponding to the positions of the pattern openings when the cell sheet is connected to the back sheet.