CN217240661U

CN217240661U - Photovoltaic module

Info

Publication number: CN217240661U
Application number: CN202220626515.2U
Authority: CN
Inventors: 蒋忠伟; 王乐; 冯志强
Original assignee: Trina Solar Co Ltd
Current assignee: Trina Solar Changzhou Technology Co ltd; Trina Solar Co Ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-08-19
Anticipated expiration: 2032-03-22

Abstract

The utility model provides a photovoltaic module, include: the solar cell panel is provided with an opposite light receiving surface and a backlight surface; the first back plate is provided with a first side and a second side which are opposite, and the first side is arranged on a backlight surface of the solar cell panel; the connecting layer is arranged on the second side of the first back plate; the first bonding layer is arranged on the surface of the connecting layer; and the junction box is arranged on the surface of the first bonding layer and is bonded with the connecting layer through the first bonding layer. The utility model discloses a photovoltaic module has avoided having improved the stability of terminal box installation because of the phenomenon that the terminal box directly bonds and arouses drops at first backplate through the method that sets up the articulamentum in the part of first backplate, can continue the first backplate that use cost is low and steam transmissivity is low simultaneously, has reduced manufacturing cost.

Description

Photovoltaic module

Technical Field

The utility model relates to a photovoltaic field specifically relates to a photovoltaic module.

Background

With the increasing prominence of energy contradiction and environmental problems, the development of various clean energy sources is a necessary trend. Solar photovoltaic power generation directly converts light energy into electric energy by means of a solar cell, is favored due to the advantage of no pollution, increases the installed capacity of a global photovoltaic power generation system year by year, and makes substantial contribution to the energy supply and the energy structure of the world.

The production process of the solar cell is relatively complex, and in brief, the production process of the current solar cell mainly comprises the following steps: texturing, diffusion, etching, coating, printing, sintering and the like. When the solar cells are actually applied, a large number of solar cells need to be connected to form a solar cell string and fixed on one surface of the back plate, and then the junction box is installed on the other surface of the back plate to form the photovoltaic module. The back sheet in the photovoltaic module is used as a key component for bearing the solar cell and fixing the junction box, and the selection of the material is crucial.

Currently, there are many materials available as the back sheet, and among them, a polyethylene terephthalate (PET) type back sheet is widely used in photovoltaic modules because it has advantages of low cost and low moisture vapor transmission rate compared to a back sheet containing a fluorine film or a fluorine coating layer. However, the PET type back plate is bonded with silicon rubber to fail, so that the junction box falls off.

Therefore, how to firmly arrange the junction box on the back plate of the photovoltaic module is a problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a photovoltaic module, this photovoltaic module can firmly set up the terminal box on photovoltaic module's backplate.

The utility model discloses a solve above-mentioned technical problem and the technical scheme who adopts is a photovoltaic module, include: the solar cell panel is provided with an opposite light receiving surface and a backlight surface; a first back plate having a first side and a second side opposite to each other, the first side being disposed at the backlight surface; a connection layer disposed on a second side of the first backplane; the first bonding layer is arranged on the surface of the connecting layer; and the junction box is arranged on the surface of the first bonding layer and is bonded with the connecting layer through the first bonding layer.

The utility model discloses an in an embodiment still include the second tie coat, the second tie coat sets up between the tie coat with the surface of first backplate second side, the second tie coat is used for connecting the tie coat with the first backplate.

In an embodiment of the present invention, the connection layer is a fluorine-containing layer, and the material of the fluorine-containing layer is polyvinyl fluoride (PVF) polyvinylidene fluoride (PVDF) or ethylene-tetrafluoroethylene copolymer (ETFE).

The second adhesive layer is arranged on the surface of the second side of the first back plate; and the second back plate is arranged on the second bonding layer, and the connecting layer is positioned on the surface of the second back plate.

In an embodiment of the present invention, the material of the second bonding layer is ethylene-vinyl acetate copolymer (EVA) polyolefin thermoplastic elastomer (POE) or polyvinyl butyral (PVB).

In an embodiment of the present invention, the back plate further includes a bonding material disposed at a side of the second back plate, and the bonding material contacts the first back plate.

In an embodiment of the present invention, the adhesive material and the first adhesive layer are the same material.

In an embodiment of the present invention, the material of the first back plate is polyethylene terephthalate.

In an embodiment of the present invention, the first adhesive layer is used to fix the surface of the junction box, and the area of the surface of the junction box is larger than the area of the bottom surface of the junction box.

In an embodiment of the present invention, the connecting layer is used for setting an area of a surface of the first bonding layer is larger than an area of a bottom surface of the junction box.

The utility model discloses a method at the local of first backplate sets up the articulamentum has avoided the phenomenon that the terminal box that arouses because of the direct bonding of terminal box is at PET type backplate drops, has improved the stability of terminal box installation. Meanwhile, the PET type back plate with low use cost and low water vapor transmittance can be continuously used, so that the production cost is reduced.

Drawings

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:

fig. 1 is a schematic top view of a photovoltaic module according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;

fig. 3 is a cross-sectional view of a photovoltaic module according to another embodiment of the present invention.

Reference numerals

100. 200 photovoltaic module

110 solar cell panel

111 light-receiving surface 5

112 backlight surface

120 first back plate

121 first side of first back plate

122 second side of the first back plate

130 connecting layer 10

140 first adhesive layer

150 terminal box

160 second adhesive layer

170 second backboard

180 binding material 15

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and the present invention is therefore not limited to the specific embodiments disclosed below.

As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.

The present invention will be explained below by way of specific examples.

Fig. 1 is a schematic top view of a photovoltaic module according to an embodiment of the present invention, and fig. 2 is a cross-sectional view taken along a-a in fig. 1, and in conjunction with fig. 1 and fig. 2, the photovoltaic module 100 includes a solar panel 110 having opposite light receiving surfaces 111 and back light surfaces 112. The light receiving surface 111 may be used to receive light when the photovoltaic module 100 is in operation. The photovoltaic module 100 further includes a first back-sheet 120 having opposite first and

second sides

121, 122, the first side 121 of the first back-sheet 120 being disposed on the backlight side 112 of the solar panel 110. In some embodiments of the present invention, the material of the first back plate 120 is polyethylene terephthalate (PET), and the PET type first back plate 120 has advantages of low cost and low moisture vapor transmission rate compared to a back plate having a fluorine-containing film or a fluorine-containing coating layer.

With continued reference to fig. 2, the photovoltaic module 100 further includes a tie layer 130 disposed on the second side 122 of the first backsheet 120. In some embodiments of the present invention, the connection layer 130 is a fluorine-containing layer, and the material of the fluorine-containing layer is polyvinyl fluoride (PVF) polyvinylidene fluoride (PVDF) or ethylene-tetrafluoroethylene copolymer (ETFE). Referring to fig. 2, in some embodiments of the present invention, the connection layer 130 is disposed on the second side 122 of the first back-plate 120 by disposing a second adhesive layer 160 between the connection layer 130 and the surface of the second side 122 of the first back-plate 120. The connecting layer 130 is disposed on the second side 122 of the photovoltaic module 100, and includes bolting, welding, bonding, coating, and other methods, which are not limited by the present invention. For example, in some embodiments of the present invention, the connection layer may be disposed on the second side 122 of the first back plate 120 by other processes, specifically, the connection layer is directly disposed on the surface of the second side 122 by a coating process, so that the second bonding layer may be omitted.

Photovoltaic assembly 100 also includes a first adhesive layer 140 and a junction box 150. The first adhesive layer 140 is disposed on the surface of the connection layer 130, and the junction box 150 is disposed on the surface of the first adhesive layer 140 and is adhered to the connection layer 130 through the first adhesive layer 140. Wherein, the connection layer 130 has a better bonding effect with the first bonding layer 140 than the first back plate 120. For example, in some embodiments of the present invention, when the material of the first adhesive layer 140 is silicon rubber, the corresponding connection layer 130 is a fluorine-containing layer, so that the first adhesive layer 140 can be better bonded. In some embodiments of the present invention, the surface of the first adhesive layer 140 for fixing the terminal box 150 has an area larger than that of the bottom surface of the terminal box 150, and the surface of the connecting layer 130 for disposing the first adhesive layer 140 has an area larger than that of the bottom surface of the terminal box 150. Thus, the stability of the connection of the terminal block 150 can be improved.

The method of arranging the connecting layer at the local part of the first backboard 120 avoids the phenomenon that the junction box falls off due to the fact that the junction box is directly adhered to the PET type backboard, improves the stability of installation of the junction box, can continue the PET type backboard with low use cost and low water vapor transmittance, and reduces the production cost.

Next, another embodiment of providing a connection layer at a part of the second side of the first back sheet will be described, and fig. 3 is a cross-sectional view of a photovoltaic module according to this embodiment of the present invention. Referring to the photovoltaic module 200 shown in fig. 3, the photovoltaic module 200 has a second adhesive layer 160 disposed on the surface of the second side 122 of the first backsheet 120. In some embodiments of the present invention, the material of the second adhesive layer 160 is ethylene-vinyl acetate copolymer (EVA) polyolefin thermoplastic elastomer (POE) or polyvinyl butyral (PVB). The photovoltaic module 200 further includes a second backsheet 170 disposed on the second adhesive layer 160, and the tie layer 130 is disposed on a surface of the second backsheet 170. In some embodiments of the present invention, the method of forming the connection layer 130 on the second back sheet 170 includes coating a fluorine-containing film on the second back sheet 170.

In some other embodiments of the present invention, the photovoltaic module 200 further comprises an adhesive material 180 disposed at the side of the second back sheet 170, and the adhesive material 180 contacts the first back sheet 170. Wherein the adhesive material 180 and the first adhesive layer 140 are made of the same material. The bonding material 180 is arranged on the side edge of the second back sheet 170, so that the connection stability of the photovoltaic module can be improved, and the junction box 150 is prevented from falling off.

Next, the junction box 150 is fixed on the first back sheet 120 by the first adhesive layer 140 disposed on the surface of the connection layer 130. For other details regarding the embodiment of fig. 3, reference may be made to the description of the embodiment of fig. 1, which is not repeated herein.

This embodiment is through the second backplate that has the articulamentum in the second side setting of first backplate, then sets up the terminal box on the articulamentum, has improved the stability of terminal box installation.

Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing disclosure is by way of example only, and is not intended to limit the present application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present application and thus fall within the spirit and scope of the exemplary embodiments of the present application.

Also, this application uses specific language to describe embodiments of the application. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.

Numerals describing the number of components, attributes, etc. are used in some embodiments, it being understood that such numerals used in the description of the embodiments are modified in some instances by the use of the modifier "about", "approximately" or "substantially". Unless otherwise indicated, "about", "approximately" or "substantially" indicates that the number allows a variation of ± 20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximations that may vary depending upon the desired properties of the individual embodiments. In some embodiments, the numerical parameter should take into account the specified significant digits and employ a general digit preserving approach. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the range are approximations, in the specific examples, such numerical values are set forth as precisely as possible within the scope of the application.

Claims

1. A photovoltaic module, comprising:

the solar cell panel is provided with an opposite light receiving surface and a backlight surface;

a first back plate having a first side and a second side opposite to each other, the first side being disposed at the backlight surface;

a connection layer disposed on a second side of the first backplane;

the first bonding layer is arranged on the surface of the connecting layer; and

and the junction box is arranged on the surface of the first bonding layer and is bonded with the connecting layer through the first bonding layer.

2. The photovoltaic module of claim 1, further comprising a second adhesive layer disposed between the tie layer and the surface of the second side of the first backsheet, the second adhesive layer for joining the tie layer and the first backsheet.

3. The photovoltaic module according to claim 1, wherein the connection layer is a fluorine-containing layer made of polyvinyl fluoride (PVF), polyvinylidene fluoride (PVDF), or ethylene-tetrafluoroethylene copolymer (ETFE).

4. The photovoltaic module of claim 1, further comprising:

a second adhesive layer disposed on a surface of the second side of the first backsheet;

and the second back plate is arranged on the second bonding layer, and the connecting layer is positioned on the surface of the second back plate.

5. The photovoltaic module of claim 4 wherein the material of the second adhesive layer is Ethylene Vinyl Acetate (EVA) polyolefin thermoplastic elastomer (POE) or polyvinyl butyral (PVB).

6. The photovoltaic module of claim 4 further comprising an adhesive material disposed on the side edge of the second backsheet, the adhesive material contacting the first backsheet.

7. The photovoltaic module of claim 6, wherein the adhesive material and the first adhesive layer are the same material.

8. The photovoltaic module of claim 1 wherein the material of the first backsheet is polyethylene terephthalate (PET).

9. The pv assembly according to claim 1 wherein the first adhesive layer has a surface for securing the junction box having an area greater than an area of a bottom surface of the junction box.

10. The photovoltaic module of claim 1, wherein the connection layer has a surface for providing the first adhesive layer having an area larger than an area of a bottom surface of the junction box.