CN218632067U

CN218632067U - Photovoltaic module

Info

Publication number: CN218632067U
Application number: CN202223067459.2U
Authority: CN
Inventors: 谢云飞; 郭志球; 高衍; 张春风; 胡益栋
Original assignee: Zhejiang Jinko Solar Co Ltd; Jinko Solar Co Ltd
Current assignee: Zhejiang Jinko Solar Co Ltd; Jinko Solar Co Ltd
Priority date: 2022-11-18
Filing date: 2022-11-18
Publication date: 2023-03-14
Anticipated expiration: 2032-11-18

Abstract

The utility model discloses a photovoltaic module, which comprises a front plate, a first packaging adhesive film and a back plate, wherein at least one group of battery strings is arranged between the first packaging adhesive film and the back plate, and a second packaging adhesive film is arranged between the battery strings and the back plate; the back plate is provided with at least three protruding strips which are arranged along a first direction and extend along a second direction, the first direction is the extending direction of the short side of the photovoltaic module, the second direction is intersected with the first direction, and the orthographic projection of the protruding strips on the plane where the back plate is located and the orthographic projection of the battery strings on the plane where the back plate is located are not overlapped. The utility model provides a photovoltaic module, through set up protruding strip on the backplate, protruding strip has shortened the cluster interval between the adjacent battery cluster at backplate place planar orthographic projection and the planar orthographic projection non-overlap of battery cluster, makes abundant gomphosis between the adjacent battery cluster, forms the structure of 0 interval of approximation, has improved photovoltaic module's conversion efficiency.

Description

Photovoltaic module

Technical Field

The utility model relates to a photovoltaic power generation technical field, more specifically relates to a photovoltaic module.

Background

The photovoltaic module is a core part in a photovoltaic power generation system and is used for converting solar energy into electric energy, or transmitting the electric energy to a storage battery for storage, or pushing a load to work. The photovoltaic module is generally composed of a front plate, an upper packaging adhesive film, a battery string, a lower packaging adhesive film and a back plate. In a conventional photovoltaic module, the string spacing between adjacent cell strings is usually about 2mm, and the conversion efficiency of the photovoltaic module is affected by the excessively large string spacing between adjacent cell strings.

Therefore, it is desirable to provide a photovoltaic module, which increases the protruding strips between adjacent cell strings to shorten the string pitch of the adjacent cell strings, so that the adjacent cell strings can be fully embedded to form a structure with a pitch close to 0, thereby improving the conversion efficiency of the photovoltaic module.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a photovoltaic module, including front bezel, first encapsulation glued membrane and backplate, be provided with at least a set of battery cluster between first encapsulation glued membrane and the backplate, be provided with second encapsulation glued membrane between battery cluster and the backplate; the backboard is provided with at least three protruding strips which are arranged along a first direction and extend along a second direction, the first direction is the extending direction of the short side of the photovoltaic module, the second direction is intersected with the first direction, and the orthographic projection of the protruding strips on the plane where the backboard is located and the orthographic projection of the battery strings on the plane where the backboard is located are not overlapped.

Optionally, the protruding strips include first protruding strips and second protruding strips, the first protruding strips are located between adjacent battery strings, and the second protruding strips are located at long edge of the back plate.

Optionally, the first raised strips and the second raised strips are equal in height in a direction perpendicular to the photovoltaic module.

Optionally, the first and second raised bars have a height in the range of 0.05mm to 0.8mm.

Optionally, the first raised strips have a width and the second raised strips have a width, a > b, along the first direction.

Optionally, characterized by 0.1m ≦ a ≦ 0.5mm.

Optionally, the distance between adjacent raised bars in the first direction is in the range of 158mm to 220mm.

Optionally, the raised strips and the back plate are of an integral structure, or the raised strips and the back plate are connected.

Optionally, the cross section of the raised strips in the first direction in the direction perpendicular to the photovoltaic module is triangular, rectangular or semicircular.

Optionally, an orthogonal projection of the second packaging adhesive film on the plane of the front plate overlaps with an orthogonal projection of the back plate on the plane of the front plate, or an orthogonal projection of the second packaging adhesive film on the plane of the front plate overlaps with an orthogonal projection of the battery string on the plane of the front plate.

Optionally, the back plate and the raised strips are made of the same material.

Compared with the prior art, the utility model provides a photovoltaic module has realized following beneficial effect at least:

the utility model provides a photovoltaic module, through set up protruding strip on the backplate, protruding strip is at backplate place planar orthographic projection and the planar orthographic projection non-overlap of battery cluster at backplate place, has shortened the cluster interval between the adjacent battery cluster, makes abundant gomphosis between the adjacent battery cluster, forms the structure of 0 interval of approximation, has improved photovoltaic module's conversion efficiency.

Of course, it is not necessary for any product of the present invention to achieve all of the above-described technical effects simultaneously.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural view of a photovoltaic module before lamination according to the present invention;

FIG. 2 is a top view of the backing plate;

FIG. 3 isbase:Sub>A schematic cross-sectional view A-A' of FIG. 2;

FIG. 4 is a schematic cross-sectional view of yet another backing plate;

fig. 5 is a schematic cross-sectional view of another back plate.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Referring to fig. 1-2, fig. 1 is a schematic structural diagram of a photovoltaic module provided by the present invention before lamination; FIG. 2 is a top view of the back plate. The embodiment provides a photovoltaic module, which comprises a front plate 10, a first packaging adhesive film 20 and a back plate 30, wherein at least one group of battery strings 40 are arranged between the first packaging adhesive film 20 and the back plate 30, and a second packaging adhesive film 50 is arranged between the battery strings 40 and the back plate 30; the back plate 30 is provided with at least three protruding strips 60 which are arranged along a first direction X and extend along a second direction Y, the first direction X is the extending direction of the short side of the photovoltaic module, the second direction Y is intersected with the first direction X, and the orthographic projection of the protruding strips 60 on the plane where the back plate 30 is located does not overlap with the orthographic projection of the battery strings 40 on the plane where the back plate 30 is located.

Specifically, the photovoltaic module comprises a front plate 10, a first packaging adhesive film 20 and a back plate 30, wherein the front plate 10 can be toughened glass, the toughened glass has the advantages of high strength, high bending strength, high impact strength, good safety performance and the like, the first packaging adhesive film 20 can be an ethylene-octylene copolymer adhesive film, the ethylene-octylene copolymer adhesive film is commonly called a POE adhesive film and has the advantages of low water vapor transmittance, high volume resistivity, weather resistance, ultraviolet aging resistance, high adhesion and the like, the back plate 50 can be a polyvinyl fluoride composite film photovoltaic back plate, the polyvinyl fluoride composite film photovoltaic back plate is commonly called a TPT photovoltaic back plate, and the photovoltaic module has the advantages of weather resistance, aging resistance, tearing resistance, good air isolation effect, good insulativity, size stability, perfect adhesion with the POE adhesive film and the like; at least one group of battery strings 40 are arranged between the first packaging adhesive film 20 and the back plate 30, a second packaging adhesive film 50 is arranged between the battery strings 40 and the back plate 30, the second packaging adhesive film 50 can be an ethylene-octylene copolymer adhesive film, the ethylene-octylene copolymer adhesive film is commonly called POE adhesive film, and the packaging adhesive film has the advantages of low water vapor transmittance, high volume resistivity, weather resistance, ultraviolet aging resistance, high adhesion and the like;

the back plate 30 is provided with a plurality of protruding strips 60, the plurality of protruding strips 60 are arranged along a first direction X and extend along a second direction Y, the first direction X is the extending direction of the short side of the photovoltaic module, and the second direction Y intersects with the first direction X, wherein two protruding strips 60 can be respectively located on the edges of the long side of the back plate, and the orthographic projection of the protruding strips 60 on the plane of the back plate 30 is not overlapped with the orthographic projection of the battery strings 40 on the plane of the back plate 30;

when the photovoltaic module is used specifically, before the photovoltaic module is laminated, the front plate 10, the first packaging adhesive film 20, the cell string 40, the second packaging adhesive film 50 and the back plate 30 are sequentially arranged, and then the lamination is performed to obtain the laminated photovoltaic module, wherein the back plate 30 is provided with the protruding strips 60, and the orthographic projections of the protruding strips 60 on the plane of the back plate 30 and the orthographic projections of the cell string 40 on the plane of the back plate 30 are not overlapped.

Compared with the prior art, the photovoltaic module that this embodiment provided has realized following beneficial effect at least:

the photovoltaic module that this embodiment provided, through set up protruding strip on the backplate, the orthographic projection of protruding strip at backplate place plane and battery cluster are at backplate place plane orthographic projection non-overlap, have shortened the cluster interval between the adjacent battery cluster, make abundant gomphosis between the adjacent battery cluster, form the structure of approximate 0 interval, have improved photovoltaic module's conversion efficiency.

In one embodiment, the raised strips 60 include first raised strips 61 and second raised strips 62, the first raised strips 61 being located between adjacent cell strings 40, and the second raised strips 62 being located at the long side edges of the back sheet 30.

Specifically, the first protruding strips 61 located between the adjacent cell strings 40 can shorten the string spacing between the adjacent cell strings, so that the adjacent cell strings are fully embedded, and the second protruding strips 62 located at the long edge of the back sheet 30 can limit the positions of the cell strings in the photovoltaic module, thereby improving the conversion efficiency of the photovoltaic module.

In one embodiment, the first and second raised bars 61, 62 are equal in height in a direction perpendicular to the photovoltaic module, and the first and second raised bars 61, 62 have a height in the range of 0.05mm to 0.8mm.

Specifically, the heights of the first protruding strips 61 and the second protruding strips 62 are equal, so that no bubbles are generated in the photovoltaic module in the laminating process, and the efficiency of the photovoltaic module is prevented from being influenced; when the heights of the first convex strips 61 and the second convex strips 62 are less than 0.05mm, the first convex strips 61 and the second convex strips 62 are too low to play a role in isolating the adjacent battery strings 40, and when the heights of the first convex strips 61 and the second convex strips 62 are more than 0.8mm, the first convex strips 61 and the second convex strips 62 are too high to cause bubbles in the assembly laminating process and influence the packaging tightness of the assembly, so that the height ranges of the first convex strips 61 and the second convex strips 62 are required to be designed to be 0.05mm-0.8mm, the effect of isolating the adjacent battery strings 40 is ensured, and the phenomenon that the bubbles in the assembly laminating process influence the packaging tightness of the assembly is avoided; specifically, the height of the first and second raised bars 61, 62 may be 0.05mm, 0.25mm, 0.45mm, 0.65mm, or 0.8mm.

In one embodiment, along the first direction X, the width of the first protruding strip 61 is a, and the width of the second protruding strip 62 is b, where a > b.

When b is less than or equal to a, the second convex strips 62 are too wide, the cell strings 40 at the outermost side of the assembly are too far away from the edges of the assembly, the area utilization rate of the assembly is not high, and the power generation efficiency is influenced, so that the width of the second convex strips 62 is required to be designed to be smaller than that of the first convex strips 61, and the area utilization rate of the assembly is improved; along the first direction X, the width of the first convex strip 61 is a, a is more than or equal to 0.1m and less than or equal to 0.5mm, when the width of the first convex strip 61 is less than 0.1mm, the first convex strip 61 is too narrow, the short circuit risk can occur in the battery string 40, when the width of the first convex strip 61 is more than 0.5mm, the first convex strip 61 is too wide, and the power generation efficiency of the assembly is influenced, so that the width of the first convex strip 61 needs to be designed to be 0.1mm-0.5mm, the short circuit risk of the battery string 40 can be avoided, and the power generation efficiency of the assembly is prevented from being influenced; specifically, the width of the first projecting strip 61 may be 0.1mm, 0.2mm, 0.3mm, 0.4mm, or 0.5mm; correspondingly, it is necessary to ensure that the width of the second raised strips is less than the width of the first raised strips, and the width of the second raised strips 62 may be 0.05mm, 0.15mm, 0.25mm, 0.35mm, or 0.45mm.

In one embodiment, the distance between adjacent raised strips 60 along the first direction X ranges from 158mm to 220mm.

Specifically, when the distance between adjacent protruding strips 60 is less than 158mm, the distance between adjacent protruding strips 60 is too narrow to accommodate the battery string 40, and when the distance between adjacent protruding strips 60 is greater than 220mm, the distance between adjacent protruding strips 60 is too wide to affect the power generation efficiency of the module, so that the distance between adjacent protruding strips 60 needs to be designed to be 158mm-220mm, which not only can accommodate the battery string 40, but also can avoid affecting the power generation efficiency of the module; in particular, the distance between adjacent raised bars 60 may be 158mm, 173mm, 188mm, 103mm, or 220mm.

In one embodiment, the raised strips 60 are integral with the back plate 30 or the raised strips 60 are attached to the back plate 30.

Specifically, when the back plate 30 is manufactured, the protruding strips 60 may be directly manufactured on the back plate 30 according to corresponding sizes, so that the protruding strips 60 and the back plate 3 are of an integral structure, or the protruding strips 60 matched with the back plate 30 are separately manufactured, and the protruding strips 60 are adhered to the back plate 30, so that the protruding strips 60 are connected with the back plate 30.

In one embodiment, the cross-section of the raised strips 60 in the first direction X in a direction perpendicular to the photovoltaic module is triangular, rectangular, or semi-circular.

Specifically, referring to fig. 3-5, fig. 3 isbase:Sub>A schematic cross-sectional view ofbase:Sub>A-base:Sub>A' of fig. 2; FIG. 4 is a schematic cross-sectional view of yet another backing plate; fig. 5 is a schematic cross-sectional view of another back plate. On the premise that the height of the first and second convex strips 61 and 62 is in the range of 0.05mm to 0.8mm, the width of the first convex strip 61 is in the range of 0.1m to 0.5mm, and the width of the second convex strip 62 is smaller than the width of the first convex strip 61, the sectional shape of the convex strip 60 in the first direction X in the direction perpendicular to the photovoltaic module may be set according to circumstances, including but not limited to a triangle, a rectangle, or a semicircle.

In one embodiment, an orthogonal projection of the second adhesive packaging film 50 on the plane of the front board 10 overlaps an orthogonal projection of the back board 30 on the plane of the front board 10, or an orthogonal projection of the second adhesive packaging film 50 on the plane of the front board 10 partially overlaps an orthogonal projection of the battery string 40 on the plane of the front board 10.

Specifically, the orthographic projection of the second encapsulation film 50 on the plane of the front board 10 overlaps with the orthographic projection of the back board 30 on the plane of the front board 10, that is, an integral second encapsulation film 50 may be used, or the orthographic projection of the second encapsulation film 50 on the plane of the front board 10 partially overlaps with the orthographic projection of the battery string 40 on the plane of the front board 10, that is, a separate strip-shaped second encapsulation film 50 may be laid in the groove formed by the adjacent raised strips 60, and the structure and the integration of the second encapsulation film 50 include but are not limited thereto, and are not described herein again.

In one embodiment, the back plate 30 and the raised strips 60 are the same material.

Specifically, the material of the back plate 30 and the raised strips 60 may be polyethylene terephthalate (commonly known as PET), or a mixture of polyethylene terephthalate (commonly known as PET) and another material, wherein the another material is any one of propylene oxide (commonly known as PO), propylene acetic acid, polytetrafluoroethylene (commonly known as PTFE), vinyl fluoride homopolymer (commonly known as PVF), polyvinylidene fluoride (commonly known as PVDF), and polyvinylidene fluoride resin (commonly known as FEVE), and the material of the back plate 30 and the raised strips 60 includes but is not limited thereto, and will not be described herein again.

In some alternative embodiments, with continued reference to fig. 3, the photovoltaic module includes a front board 10, a first encapsulant film 20, and a back board 30, at least one set of cell strings 40 is disposed between the first encapsulant film 20 and the back board 30, a second encapsulant film 50 is disposed between the cell strings 40 and the back board 30, at least three protruding strips 60 arranged along a first direction X and extending along a second direction Y are disposed on the back board 30, the protruding strips 60 include first protruding strips 61 and second protruding strips 62, the first protruding strips 61 are disposed between adjacent cell strings 40, the second protruding strips 62 are disposed at long edges of the back board 30, in a direction perpendicular to the photovoltaic module, the heights of the first protruding strips 61 and the second protruding strips 62 are both 0.8mm, in the first direction X, the width of the first protruding strips 61 is 0.5mm, the width of the second protruding strips 62 is 0.4mm, the distance between the adjacent protruding strips 60 is 220mm, the protruding strips 60 and the back board 30 are in a structure, in a direction perpendicular to the integrated package, the integrated package is formed by overlapping the front board 10 and the front board 10.

In some alternative embodiments, as shown with continued reference to fig. 4, the photovoltaic module includes a front board 10, a first adhesive packaging film 20, and a back board 30, at least one set of battery strings 40 is disposed between the first adhesive packaging film 20 and the back board 30, a second adhesive packaging film 50 is disposed between the battery strings 40 and the back board 30, at least three convex stripes 60 arranged along a first direction X and extending along a second direction Y are disposed on the back board 30, each convex stripe 60 includes a first convex stripe 61 and a second convex stripe 62, the first convex stripe 61 is disposed between adjacent battery strings 40, the second convex stripe 62 is disposed at a long edge of the back board 30, in a direction perpendicular to the photovoltaic module, a height of each of the first convex stripe 61 and the second convex stripe 62 is 0.8mm, in the first direction X, a width of the first convex stripe 61 is 0.5mm, a width of the second convex stripe 62 is 0.4mm, a distance of the adjacent convex stripes 60 is 220mm, the convex stripes 60 is connected to the back board 30, in the direction perpendicular to the photovoltaic module, a cross section of the convex stripes 60 along the second direction X is a projection of the second convex stripe 60 on a front plane of the second adhesive packaging film 10, and a projection of the front plane of the second adhesive packaging film is formed by a triangle, and a projection of the front portion of the second adhesive packaging film 10 of the front board 10 is formed by the front board.

In some alternative embodiments, as shown with continued reference to fig. 5, the photovoltaic module includes a front board 10, a first encapsulant film 20, and a back board 30, at least one set of battery strings 40 is disposed between the first encapsulant film 20 and the back board 30, a second encapsulant film 50 is disposed between the battery strings 40 and the back board 30, at least three protruding strips 60 arranged along a first direction X and extending along a second direction Y are disposed on the back board 30, the protruding strips 60 include first protruding strips 61 and second protruding strips 62, the first protruding strips 61 are disposed between adjacent battery strings 40, the second protruding strips 62 are disposed on long edges of the back board 30, in a direction perpendicular to the photovoltaic module, the heights of the first protruding strips 61 and the second protruding strips 62 are both 0.8mm, in the first direction X, the width of the first protruding strips 61 is 0.5mm, the width of the second protruding strips 62 is 0.4mm, the distance between the adjacent protruding strips 60 is 220mm, the protruding strips 60 are connected to the back board 30, in the direction perpendicular to the photovoltaic module, the direction, the protruding strips 60 overlap with the front board 10, and the front projection plane of the second protruding strips 50 overlaps with the front board 10.

According to the above embodiment, the utility model provides a photovoltaic module has realized following beneficial effect at least:

Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A photovoltaic module is characterized by comprising a front plate, a first packaging adhesive film and a back plate, wherein at least one group of battery strings is arranged between the first packaging adhesive film and the back plate, and a second packaging adhesive film is arranged between the battery strings and the back plate;

the photovoltaic module comprises a back plate and is characterized in that at least three protruding strips which are arranged along a first direction and extend along a second direction are arranged on the back plate, the first direction is the extending direction of the short side of the photovoltaic module, the second direction is intersected with the first direction, and the orthographic projection of the protruding strips on the plane where the back plate is located and the orthographic projection of the battery strings on the plane where the back plate is located are not overlapped.

2. The photovoltaic module of claim 1, wherein the raised strips comprise first raised strips and second raised strips, the first raised strips being located between adjacent cell strings, the second raised strips being located at the long edge of the backsheet.

3. The photovoltaic module of claim 2, wherein the first and second raised strips are equal in height in a direction perpendicular to the photovoltaic module.

4. The photovoltaic assembly of claim 3, wherein the first and second raised bars have a height in the range of 0.05mm to 0.8mm.

5. The photovoltaic module of claim 3, wherein the first raised strip has a width a and the second raised strip has a width b, a > b, along the first direction.

6. The photovoltaic module of claim 5, wherein a is 0.1 m.ltoreq.a.ltoreq.0.5 mm.

7. The photovoltaic module of claim 1, wherein a distance between adjacent raised strips along the first direction is in a range of 158mm to 220mm.

8. The assembly according to claim 7, wherein the raised strips are integral with the backing sheet or are attached to the backing sheet.

9. The assembly according to claim 8, wherein the raised strips are triangular, rectangular or semi-circular in cross-section in the first direction in a direction perpendicular to the assembly.

10. The photovoltaic module according to claim 1, wherein an orthographic projection of the second encapsulant film on the plane of the front plate overlaps with an orthographic projection of the back plate on the plane of the front plate, or an orthographic projection of the second encapsulant film on the plane of the front plate partially overlaps with an orthographic projection of the cell string on the plane of the front plate.

11. The assembly according to any one of claims 1-10, wherein the backsheet and the raised strips are the same material.