CN210956696U

CN210956696U - Gasket suitable for shingled photovoltaic module and shingled photovoltaic module

Info

Publication number: CN210956696U
Application number: CN202020024489.7U
Authority: CN
Inventors: 俞佳辰; 龚小东
Original assignee: Hanwha SolarOne Qidong Co Ltd
Current assignee: Hanwha Q Cells Qidong Co Ltd
Priority date: 2020-01-07
Filing date: 2020-01-07
Publication date: 2020-07-07
Anticipated expiration: 2030-01-07

Abstract

The utility model discloses a gasket suitable for photovoltaic module tiles, gasket include the body and set up holding tank on the body, the extending direction perpendicular to of holding tank the length extending direction of body, the holding tank runs through the thickness direction of body. The utility model discloses a gasket suitable for photovoltaic module tiles, it is a slice object, uses it when between the adjacent battery piece overlap portion of photovoltaic module tiles, and upper and lower battery piece all is the contact of face and face with this gasket, can make overlap portion's battery piece atress even, and the hidden problem of splitting appears in the battery piece when avoiding the later stage to carry out the lamination to the battery piece, improves the yields of photovoltaic module tiles production.

Description

Gasket suitable for shingled photovoltaic module and shingled photovoltaic module

Technical Field

The utility model belongs to the technical field of photovoltaic module makes, concretely relates to be applicable to shingled photovoltaic module's gasket and included shingled photovoltaic module of this gasket.

Background

With the continuous consumption of energy and the rising of energy price, the development and utilization of new energy becomes a main subject of research in the energy field at present. Because solar energy has the advantages of no pollution, no regional limitation, inexhaustible energy and the like, the research on solar power generation becomes one of the popular directions for developing new energy. At present, solar cell power generation is a main way for people to use solar energy. With the continuous development of photovoltaic technology, photovoltaic module products as a semi-conductor device for converting solar energy into electric energy are rapidly developed.

With the continuous development of the photovoltaic industry, the industry competition is more and more severe, how to improve the output power of the assembly also becomes the key point of industry research, on one hand, the efficiency of the battery at the battery end is improved, and on the other hand, various interconnection technologies at the assembly end are continuously developed. The traditional battery interconnection technology is that battery pieces are directly connected through welding strips, and gaps exist among the battery pieces in the connection mode, so that the effective utilization area of the battery pieces can be reduced. In order to increase the utilization of the device area, various new types of device interconnection methods are continuously provided, and the main widely known technical types include half-chip, tile-stack, and piece-splicing technologies.

At present, the overlap joint of two adjacent battery plates has a certain area of overlap in the shingle connection structure (shingled photovoltaic module) of the battery plates, and the two adjacent battery plates are electrically connected through a welding strip. At present, the laminated tile assembly can flatten the round wire photovoltaic solder strip before series welding, but the yield strength of the flattened photovoltaic solder strip at the flattening position is increased, and the problem of hidden cracking of a cell sheet can occur when the cell sheet is laminated.

Disclosure of Invention

In view of this, in order to overcome prior art's defect, the utility model provides a gasket suitable for stack tile photovoltaic module uses it between the overlap portion of stack tile photovoltaic module battery piece, can effectively reduce the hidden production that splits of photovoltaic module.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a gasket suitable for shingled photovoltaic module, the gasket includes the body and sets up holding tank on the body, the extending direction perpendicular to of holding tank the length extending direction of body, the holding tank runs through the thickness direction of body.

The gasket is plane, and when placing between adjacent battery piece, upper and lower battery piece and this gasket are all face-to-face contact, and the battery piece overlapping region can not produce concentrated stress in the lamination process, reduces the risk that the piece produced.

Preferably, the gasket is made of a transparent polymer material. The transparent high polymer material is adopted for preparation, so that the blocking of light rays can be avoided.

More preferably, the gasket is made of EVA or PUR. The material with certain flexibility such as EVA or PUR is adopted, so that the buffer effect can be further realized during the lamination of the photovoltaic module, and the hidden crack of the cell caused by stress concentration is avoided. The utility model discloses an in some embodiments, the EVA material that the encapsulated material is the same around preferably in with photovoltaic module, can be when photovoltaic module lamination, the gasket has the melting of certain degree, can better fuse together with encapsulated material around with for the overlap portion atress of adjacent battery piece is more even.

Preferably, the length of the accommodating groove is greater than or equal to 1/2 of the width of the body, so that the accommodating groove can accommodate more welding strips, and the problem of hidden breakage of the battery piece caused by the problem of welding strips is further avoided.

Preferably, the intervals between adjacent holding tanks are the same, and the welding strips corresponding to the battery pieces are arranged.

Preferably, the width of the accommodating groove is 0.2-2 mm. In some embodiments of the present invention, the diameter of the solder strip is 0.25-0.5mm, and the width of the holding groove must be larger than the diameter of the solder strip to better hold the solder strip and match the solder strips of different specifications.

Preferably, the thickness of the gasket is 0.4-0.8mm, and too thin has poor buffering effect, and too thick increases the height difference between adjacent battery pieces.

Preferably, the width of the shim is 8-12mm, preferably 10 mm.

The utility model also provides a fold photovoltaic module of tiling includes front bezel, preceding encapsulating material, battery layer, back encapsulating material and back plate from top to bottom in proper order, the battery layer includes two battery pieces at least, has between the overlap section of adjacent battery piece as above the gasket.

Preferably, the shingled photovoltaic module has a solder strip for electrically connecting adjacent cells, the gasket has the receiving groove corresponding to the solder strip, and the solder strip is partially received in the receiving groove. The front side of a front battery piece is welded and taken and is led into the back of a back battery piece, and the welding strip of the overlapped part of the two battery pieces is contained in the containing groove, so that the battery piece is in contact with the gasket, the stress area is increased, the stress concentration is reduced, and the hidden crack is avoided.

Compared with the prior art, the utility model discloses an useful part lies in: the utility model discloses a gasket suitable for photovoltaic module tiles, it is a slice object, uses it when between the adjacent battery piece overlap portion of photovoltaic module tiles, and upper and lower battery piece all is the contact of face and face with this gasket, can make overlap portion's battery piece atress even, and the hidden problem of splitting appears in the battery piece when avoiding the later stage to carry out the lamination to the battery piece, improves the yields of photovoltaic module tiles production.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a perspective view of a gasket in a preferred embodiment of the present invention;

FIG. 2 is a top view of a gasket in a preferred embodiment of the invention;

fig. 3 is a front perspective view of a shingled photovoltaic module in a preferred embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of a laminated photovoltaic module employing a gasket according to a preferred embodiment of the present invention;

wherein: the battery comprises a gasket-1, a body-11, a containing groove-12, a battery piece-2 and a welding strip-3.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

Referring to fig. 1 to 4, the tiled photovoltaic module of the present embodiment sequentially includes a front plate, a front encapsulant, a battery layer, a back encapsulant and a back plate from top to bottom, the battery layer at least includes two battery pieces 2, and a spacer 1 is disposed between overlapping portions of adjacent battery pieces 2. The gasket 1 is the plane setting, and when placing between adjacent battery piece 2, upper and lower battery piece 2 all is the contact of face with the face with this gasket 1, and battery piece 2 overlap region can not produce concentrated stress in the lamination process, reduces the risk that the piece produced. The length of the spacer 1 is equal to or greater than the length or width of the single cell piece 2, and preferably is an integral multiple of the length or width of the single cell piece 2.

As shown in fig. 1-2, the gasket 1 suitable for a shingled photovoltaic module in the present embodiment includes a body 11 and an accommodating groove 12 formed on the body 11, wherein an extending direction of the accommodating groove 12 is perpendicular to a length extending direction of the body 11, and the accommodating groove 12 penetrates through a thickness direction of the body 11.

The thickness of the gasket 1 is 0.6mm, the buffer effect is poor when the gasket is too thin, and the height difference between the adjacent battery pieces 2 is increased when the gasket is too thick. The width of the gasket 1 is preferably 10 mm.

The diameter of the solder strip 3 is 0.25-0.5mm, the width of the accommodating groove 12 is required to be larger than the diameter of the solder strip 3 so as to better accommodate the solder strip 3 and match the solder strips 3 with different specifications, and the width of the accommodating groove 12 is 0.2-2 mm. As in the present embodiment, the solder ribbon 3 has a diameter of 0.4mm and the accommodating groove 12 has a width of 1 mm.

The interval between adjacent holding tank 12 is the same, corresponds the 3 settings in area that weld of battery piece 2, and holding tank 12 has all been seted up to every welding area 3 that body 11 corresponds. The length of the accommodating groove 12 is greater than or equal to 1/2 of the width of the body 11, so that the accommodating groove 12 can accommodate more solder strips 3, and the problem of hidden cracking of the battery piece 2 caused by the problem of the solder strips 3 is further avoided. The length of the receiving groove 12 in this embodiment is about 2/3 of the width of the body 11.

The gasket 1 is made of transparent polymer material, and specifically may be EVA or PUR. The transparent high polymer material is adopted for preparation, so that the blocking of light rays can be avoided. Materials with certain flexibility such as EVA or PUR are adopted, so that a buffering effect can be further achieved during the lamination of the photovoltaic module, and the hidden crack of the cell piece 2 caused by stress concentration is avoided. In this embodiment, the material of gasket 1 is the same EVA material with encapsulating material around in the photovoltaic module, can be when the photovoltaic module lamination, and gasket 1 has the melting of certain degree, can better fuse together with encapsulating material around with for the overlap portion atress of adjacent battery piece 2 is more even.

The laminated photovoltaic module is provided with a welding strip 3 for electrically connecting the adjacent battery pieces 2, the gasket 1 is provided with a containing groove 12 corresponding to the welding strip 3, and the welding strip 3 is partially contained in the containing groove 12. The front side welding strip 3 of the front battery piece 2 is led into the back side of the back battery piece 2, the welding strips 3 of the overlapped parts of the two battery pieces 2 are contained in the containing groove 12, so that the battery pieces 2 are in contact with the gasket 1, the stress area is increased, the stress concentration is reduced, and the hidden crack is avoided.

The preparation method of the shingled photovoltaic module in this example is briefly described as follows:

the gasket 1 is prepared in advance, then the gasket 1 is placed at the overlapped part of the adjacent battery pieces 2, then welding of the welding strips 3 is carried out, the front welding strip 3 of the front battery piece 2 is led into the back of the rear battery piece 2, and the welding strips 3 at the overlapped part of the two battery pieces 2 are accommodated in the accommodating groove 12. After the welding strips 3 are welded, the photovoltaic module is laminated according to the lamination sequence of the front plate, the front packaging material, the battery layer, the rear packaging material and the rear plate, so that the laminated photovoltaic module in the embodiment is obtained.

In a normal laminated photovoltaic module, a cell sheet and a cell sheet have an overlapping area of 0.5mm-1mm, the front side of the cell sheet is connected with the back side of an adjacent cell sheet by a welding strip, although the welding strip of the overlapping area is flattened, the overlapping part of the cell sheet except for the welding strip area has a hollow part in other areas, so that the welding strip area of the cell sheet can bear large concentrated stress in the laminating process, and cracks are easily generated. The electrical performance of the laminated photovoltaic module obtained by the method and the structure is similar to that of the laminated photovoltaic module in the prior art, but the gasket prepared in advance is adopted, so that the problem of hidden cracking caused by stress concentration of the cell when the cell is laminated in the later period is solved, the yield is higher, and the production cost is indirectly reduced.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a gasket suitable for shingled photovoltaic module, its characterized in that, gasket include the body and set up holding tank on the body, the extending direction perpendicular to of holding tank the length extending direction of body, the holding tank runs through the thickness direction of body.

2. The gasket of claim 1 wherein the gasket is made of a transparent polymer material.

3. The gasket of claim 2 wherein the gasket is made of EVA or PUR.

4. The gasket of claim 1 wherein the receiving groove has a length greater than or equal to 1/2 of the body width.

5. The gasket of claim 1 wherein the spacing between adjacent receiving grooves is the same.

6. The gasket of claim 1 wherein the receiving groove has a width of 0.2-2 mm.

7. The gasket of claim 1 wherein the thickness of the gasket is 0.4-0.8 mm.

8. The gasket of claim 1 wherein the gasket has a width of 8-12 mm.

9. A shingled photovoltaic module comprising, in order from top to bottom, a front plate, a front encapsulant, a cell layer, a back encapsulant, and a back plate, wherein the cell layer comprises at least two cells, and wherein the spacers of any one of claims 1-8 are disposed between overlapping portions of adjacent cells.

10. The shingled photovoltaic module as defined by claim 9 having a solder strip for electrically connecting adjacent cells, wherein the pads have receiving slots corresponding to the solder strip, and the solder strip is partially received in the receiving slots.