CN222004650U - Weather-proof backboard and photovoltaic module - Google Patents

Abstract

The utility model discloses a weather-proof backboard and a photovoltaic module, which are applied to the field of photovoltaic module preparation, wherein the weather-proof backboard comprises the following components: sequentially stacking an integrated protective layer, a matrix, an adhesive layer and a thermoplastic polyolefin layer; the protective layer faces the inner side of the photovoltaic module, and the thermoplastic polyolefin layer faces the outer side of the photovoltaic module. According to the utility model, the outermost side of the backboard is arranged as the thermoplastic polyolefin layer matched with the thermoplastic polyolefin waterproof coiled material of the external flexible roof, so that the convenience of installing the component on the surface of the flexible roof can be improved, the weather resistance of the component is ensured, the use stability of the weather-proof backboard is improved, and the service life of the weather-proof backboard is prolonged.

Description

Weather-proof backboard and photovoltaic module

Technical Field

The utility model relates to the field of photovoltaic modules, in particular to a weather-resistant backboard and a photovoltaic module.

Background

The existing backboard production process mainly comprises a coating method and a film coating method, and the existing backboard is mainly a glass backboard, a polyvinyl formal fluorine-containing backboard and a polyvinylidene fluoride fluorine-containing backboard when being installed, especially when being installed on a flexible roof, as the surface of the flexible roof is mainly a thermoplastic polyolefin waterproof coiled material, the surface of the flexible roof is not matched with the backboard material, and therefore the complexity of assembly installation is improved.

Disclosure of utility model

Accordingly, the utility model aims to provide a weather-resistant backboard and a photovoltaic module, which solve the problem that the backboard cannot be matched with a flexible roof in the prior art, so that the module is complex to install.

In order to solve the technical problems, the present utility model provides a weather-resistant back plate, comprising:

Sequentially stacking an integrated protective layer, a matrix, an adhesive layer and a thermoplastic polyolefin layer;

The protective layer faces the inner side of the photovoltaic module, and the thermoplastic polyolefin layer faces the outer side of the photovoltaic module.

Optionally, the protective layer, the substrate, the adhesive layer and the thermoplastic polyolefin layer are transparent film layers.

Optionally, the substrate is a transparent PET layer.

Optionally, the protective layer is a transparent fluorine-containing protective layer.

Optionally, the transparent fluorine-containing protective layer is a transparent FEVE coating film;

The transparent FEVE coating film is chemically crosslinked with the transparent PET layer.

Optionally, the thermoplastic polyolefin layer has a thickness of 50 to 100 microns.

Optionally, the adhesive layer is a silicone adhesive layer.

Optionally, an adhesion promoting layer is arranged between the thermoplastic polyolefin layer and the silicone adhesive layer;

An adhesion promoting layer is arranged between the matrix and the silicone adhesive layer.

Optionally, the adhesion promoting layer is a xylene adhesion promoting layer or an ethyl acetate adhesion promoting layer.

The utility model also provides a photovoltaic module, comprising:

The front cover plate, the front adhesive film, the photovoltaic cell and the back adhesive film are sequentially arranged, and the weather-resistant backboard is as described above;

The protective layer in the weather-proof backboard is against the back adhesive film, and the thermoplastic polyolefin layer in the weather-proof backboard is against the outside air.

The weather-resistant backboard provided by the utility model comprises the protective layer, the matrix, the bonding layer and the thermoplastic polyolefin layer which are sequentially laminated into a whole, wherein the protective layer faces the inner side of the photovoltaic module, and the thermoplastic polyolefin layer faces the outer side of the photovoltaic module. According to the utility model, the outermost side of the backboard is arranged to be the thermoplastic polyolefin layer matched with the external thermoplastic polyolefin waterproof coiled material, so that the waterproof coiled material can be matched with the waterproof coiled material arranged in the flexible roof, the convenience of installing the assembly on the surface of the flexible roof is improved, meanwhile, the weather resistance of the assembly is ensured, the use stability of the weather-proof backboard is improved, and the service life is further prolonged.

In addition, the utility model also provides a photovoltaic module, which has the beneficial effects.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a weather-resistant back plate according to an embodiment of the present utility model;

Fig. 2 is a schematic structural diagram of another weather-resistant back plate according to an embodiment of the present utility model;

Fig. 3 is a schematic structural diagram of a photovoltaic module according to an embodiment of the present utility model.

In fig. 1 to 3, reference numerals are explained as follows:

1-a front cover plate, 2-a front adhesive film, 3-a photovoltaic cell and 4-a back adhesive film;

10-protective layer, 20-substrate, 30-adhesive layer, 31-silicone adhesive layer, 40-thermoplastic polyolefin layer, 50-tackifying layer.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The existing production process of the backboard in the photovoltaic module mainly comprises a coating method and a film coating method, and the currently prepared backboard is mainly a glass backboard, a polyvinyl formal fluorine-containing backboard and a polyvinylidene fluoride fluorine-containing backboard during installation, especially when the backboard is installed on a flexible roof, because the surface of the flexible roof is mainly a thermoplastic polyolefin waterproof coiled material, the thermoplastic polyolefin waterproof coiled material is not matched with the backboard, and the installation of the module is complex.

According to the utility model, the outermost side of the backboard is provided with the thermoplastic polyolefin layer matched with the external thermoplastic polyolefin waterproof coiled material, so that the convenience of installing the assembly on the surface of the flexible roof can be improved, the weather resistance of the assembly is ensured, the use stability of the weather-proof backboard is improved, and the service life of the weather-proof backboard is prolonged.

Example 1:

referring to fig. 1, fig. 1 is a schematic structural diagram of a weather-resistant back plate according to an embodiment of the utility model. The weather-resistant backsheet may include:

Sequentially stacking the protective layer 10, the substrate 20, the adhesive layer 30 and the thermoplastic polyolefin layer 40 as a whole;

The protective layer 10 is directed towards the inside of the photovoltaic module and the thermoplastic polyolefin layer 40 is directed towards the outside of the photovoltaic module.

In this embodiment, the outermost side that contacts backplate and air sets up with flexible roofing surface looks adaptation, can improve the photovoltaic module who uses this weather-proof backplate, installs the convenience at flexible roofing, improves installation effectiveness. The surface is laid to the thermoplastic polyolefin waterproofing membrane that utilizes in the flexible roofing at present, sets up the backplate and the outside of air contact into thermoplastic polyolefin layer 40 in this embodiment, can guarantee the weather resistance of backplate under the prerequisite of backplate and flexible roofing adaptation to form the protection to base member 20, and then improve the life of backplate.

The present embodiment is not limited to a specific manner of connecting the protective layer 10 to the base 20, as long as the protective layer 10 and the base 20 are firmly connected. Accordingly, the specific structure and material of the adhesive layer 30 are not limited in this embodiment, as long as the thermoplastic polyolefin layer 40 and the substrate 20 can be adhered, and for example, a hot melt adhesive may be used for the adhesive layer 30. In this example, thermoplastic Polyolefin (TPO) is a material existing in the prior art.

Further, in order to secure weather resistance and functionality of the thermoplastic polyolefin layer 40, the thickness of the thermoplastic polyolefin layer 40 may be 50 to 100 μm.

In this embodiment, the thickness of the thermoplastic polyolefin layer 40 is set to be in the range of 50 micrometers to 100 micrometers, and the thermoplastic polyolefin layer 40 is disposed at the outermost side of the back sheet, so that the protection and weather resistance of the thermoplastic polyolefin layer 40 can be ensured, and the stability of the assembly can be ensured.

The weather-resistant backboard provided by the embodiment of the utility model comprises a protective layer 10, a matrix 20, an adhesive layer 30 and a thermoplastic polyolefin layer 40 which are sequentially laminated into a whole, wherein the protective layer 10 faces the inner side of the photovoltaic module, and the thermoplastic polyolefin layer 40 faces the outer side of the photovoltaic module. According to the utility model, the thermoplastic polyolefin layer 40 matched with the external thermoplastic polyolefin waterproof coiled material is arranged at the outermost side of the backboard, so that the convenience of installing the assembly on the surface of the flexible roof can be improved, the weather resistance of the assembly is ensured, the use stability of the weather-proof backboard is improved, and the service life is further prolonged. In addition, the thickness of the thermoplastic polyolefin layer 40 is set to be in the range of 50-100 micrometers, so that the protection and weather resistance of the thermoplastic polyolefin layer 40 when the thermoplastic polyolefin layer 40 is arranged at the outermost side of the back plate can be ensured, and the service life of the assembly can be ensured.

Example 2:

The embodiment of the present utility model is different from embodiment 1 in that: the protective layer, the matrix, the bonding layer and the thermoplastic polyolefin layer are transparent film layers.

In this embodiment, the multilayer structure that stacks up in the weather-proof backplate sets up into transparent inoxidizing coating, transparent base member, transparent adhesive layer and transparent thermoplasticity polyolefin layer respectively, can improve the light transmissivity of backplate, and then improves photovoltaic module's photoelectric conversion efficiency.

Further, in order to improve the lightweight degree of the back sheet and to improve the convenience of preparation and mounting, the substrate may be provided as a transparent PET (PET is a material containing polyethylene terephthalate).

In this embodiment, the substrate is set to a transparent PET layer, so that the weight of the backboard can be reduced, and the installation difficulty can be reduced when the backboard is installed in the photovoltaic module and the prepared photovoltaic module is subsequently installed and transported. In this embodiment, the transparent PET is a material existing in the prior art.

Further, in order to ensure the service life of the substrate, the protective layer may be a transparent fluorine-containing protective layer.

In the embodiment, the protective layer is set to be a transparent fluorine-containing protective layer, so that the transparent PET layer can be prevented from being damaged by ultraviolet light, meanwhile, the degradation rate of the transparent PET layer is reduced, the service life of the backboard is prolonged, and the insulativity of the backboard is improved. In this embodiment, the fluorine-containing material is a material existing in the prior art, and in this embodiment, the transparent fluorine-containing material may be disposed on the inner side of the transparent PET layer toward the photovoltaic module, and may be used as the transparent fluorine-containing protective layer.

Further, in order to further improve the connection stability of the transparent fluorine-containing protective layer and the transparent PET layer, the transparent fluorine-containing protective layer may be provided as a transparent FEVE coating film (the FEVE coating film is a fluorocarbon resin coating film);

The transparent FEVE coating film is chemically crosslinked with the transparent PET layer.

In the embodiment, the transparent fluorine-containing protective layer is set as the transparent FEVE coating film, isocyanate can be used as a bridging reaction auxiliary agent, so that the contact surface of the transparent FEVE coating film and the transparent PET layer is chemically crosslinked to form a stable chemical bond, and further the transparent FEVE coating film and the transparent PET layer are connected and integrated without adhesive. In this embodiment, the transparent FEVE coating film is made of a material existing in the prior art, and the isocyanate is the same as the existing agent.

The weather-resistant backboard provided by the embodiment of the utility model comprises a transparent protective layer, a transparent matrix, a transparent adhesive layer and a transparent thermoplastic polyolefin layer which are sequentially laminated into a whole, wherein the transparent protective layer faces the inner side of the photovoltaic module, and the transparent thermoplastic polyolefin layer faces the outer side of the photovoltaic module.

According to the utility model, the outermost side of the backboard is provided with the transparent thermoplastic polyolefin layer matched with the external thermoplastic polyolefin waterproof coiled material, so that the convenience of installing the assembly on the surface of the flexible roof can be improved, meanwhile, the weather resistance of the assembly is ensured, the use stability of the weather-proof backboard is improved, the service life is further prolonged, the multilayer structures laminated in the weather-proof backboard are respectively provided with the transparent film layers, and the photoelectric conversion efficiency of the photovoltaic assembly is improved.

In addition, the transparent substrate is arranged to be the transparent PET layer, so that weight reduction of the backboard can be realized, and the installation difficulty can be reduced when the backboard is installed in the photovoltaic module and the prepared photovoltaic module is installed and transported subsequently; the transparent protective layer is set to be the transparent fluorine-containing protective layer, so that the transparent PET layer can be prevented from being damaged by ultraviolet light, meanwhile, the degradation rate of the transparent PET layer is reduced, the service life of the backboard is prolonged, and the insulativity of the backboard is improved; the transparent fluorine-containing protective layer is set to be the transparent FEVE coating film, and the transparent FEVE coating film and the transparent PET are subjected to chemical crosslinking, so that the connection stability is improved.

Example 3:

Referring to fig. 2, fig. 2 is a schematic structural diagram of another weather-resistant back plate according to an embodiment of the utility model. The embodiment of the present utility model is different from embodiment 1 in that: the adhesive layer is a silicone adhesive layer 31.

In this embodiment, the substrate 20 is connected with the thermoplastic polyolefin layer 40 through the silicone adhesive layer 31, so that the weather resistance of the back plate can be further improved, the application scene of the back plate can be further widened, and the stability of the back plate structure can be improved. In the present embodiment, the silicone adhesive layer 31 is a structural adhesive made of a conventional material.

Further, in order to enhance the connection stability of the substrate 20 and the thermoplastic polyolefin layer 40, an adhesion promoting layer 50 may be disposed between the thermoplastic polyolefin layer 40 and the silicone adhesive layer 31;

an adhesion promoting layer 50 may be disposed between the substrate 20 and the silicone gum 31.

It should be noted that, in this embodiment, by disposing the adhesion promoting layer 50 between the thermoplastic polyolefin layer 40 and the silicone adhesive layer 31 and disposing the adhesion promoting layer 50 between the substrate 20 and the silicone adhesive layer 31, the connection stability between the thermoplastic polyolefin layer 40 and the silicone adhesive layer 31 and the connection stability between the substrate 20 and the silicone adhesive layer 31 are improved, and meanwhile, the high temperature resistance of the back plate is improved, in this embodiment, the polarity of the thermoplastic polyolefin is low, the adhesion with the silicone adhesive layer 31 is lower, and the stability of the back plate can be ensured by introducing the adhesion promoting layer 50. The specific material of the adhesion promoting layer 50 is not limited in this embodiment. For example, the adhesion promoting layer 50 may be a material that has good adhesion with both the thermoplastic polyolefin layer 40 and the silicone adhesive layer 31, or the adhesion promoting layer 50 may be an auxiliary agent that enhances the adhesion stability between the thermoplastic polyolefin layer 40 and the silicone adhesive layer 31.

Further, in order to secure the effect of the adhesion promoting layer 50 to strengthen the connection stability of the thermoplastic polyolefin layer 40 and the silicone adhesive layer 31, the adhesion promoting layer 50 may be a xylene adhesion promoting layer or an ethyl acetate adhesion promoting layer.

In this embodiment, the adhesion promoting layer 50 is a xylene adhesion promoting layer or an ethyl acetate adhesion promoting layer, which can make the xylene adhesion promoting layer or the ethyl acetate adhesion promoting layer connect the thermoplastic polyolefin layer 40 and the silicone adhesive layer 31 through swelling, so as to improve the connection stability of the thermoplastic polyolefin layer 40 and the silicone adhesive layer 31, and improve the connection stability between the substrate 20 and the silicone adhesive layer 31. It should be noted that the ethyl acetate tackifying layer is an environment-friendly tackifying layer, and the xylene tackifying layer has better bonding effect.

The weather-resistant backboard provided by the embodiment of the utility model comprises a protective layer 10, a matrix 20, a silicone adhesive layer 31 and a thermoplastic polyolefin layer 40 which are sequentially laminated into a whole, wherein the protective layer 10 faces the inner side of the photovoltaic module, and the thermoplastic polyolefin layer 40 faces the outer side of the photovoltaic module.

According to the utility model, the thermoplastic polyolefin layer 40 matched with the external thermoplastic polyolefin waterproof coiled material is arranged at the outermost side of the backboard, so that the convenience of installing the assembly on the surface of the flexible roof can be improved, meanwhile, the weather resistance of the assembly is ensured, the use stability of the weather-proof backboard is improved, and the service life of the weather-proof backboard is prolonged.

In addition, in the embodiment of the utility model, the adhesion promoting layer 50 is arranged between the thermoplastic polyolefin layer 40 and the silicone adhesive layer 31 and between the substrate 20 and the silicone adhesive layer 31, so that the connection stability of the thermoplastic polyolefin layer 40 and the silicone adhesive layer 31 is improved, the connection stability between the substrate 20 and the silicone adhesive layer 31 is improved, and the high temperature resistance of the back plate is improved; by providing the adhesion promoting layer 50 as a xylene adhesion promoting layer or ethyl acetate adhesion promoting layer, it is possible to connect the thermoplastic polyolefin layer 40 and the silicone adhesive layer 31 by swelling and connect the base 20 and the silicone adhesive layer 31, further improving the connection stability of the thermoplastic polyolefin layer 40 and the silicone adhesive layer 31 and the connection stability of the base 20 and the silicone adhesive layer 31.

In order to facilitate understanding of the embodiments of the present utility model, the weather-resistant back plate may specifically include:

Sequentially stacking a transparent FEVE coating film, a transparent PET layer, a silicone adhesive layer and a transparent thermoplastic polyolefin layer which are integrated; the transparent thermoplastic polyolefin layer has a thickness of 50 to 100 microns;

The transparent FEVE coating film faces the inner side of the photovoltaic module, and the transparent thermoplastic polyolefin layer faces the outer side of the photovoltaic module;

The transparent FEVE coating film is chemically crosslinked with the transparent PET layer;

The transparent PET layer is connected with the transparent thermoplastic polyolefin layer through a silicone adhesive layer; a xylene tackifying layer or an ethyl acetate tackifying layer is arranged between the transparent thermoplastic polyolefin layer and the silicone adhesive layer; and a xylene tackifying layer or an ethyl acetate tackifying layer is arranged between the transparent PET layer and the silicone adhesive layer.

The following describes the photovoltaic module provided by the embodiment of the present utility model, and the photovoltaic module described below and the weather-resistant back plate described above may be referred to correspondingly.

Referring to fig. 3 specifically, fig. 3 is a schematic structural diagram of a photovoltaic module according to an embodiment of the present utility model, which may include:

The front cover plate 1, the front adhesive film 2, the photovoltaic cell 3, the back adhesive film 4 and the weather-resistant backboard are sequentially arranged;

The protective layer 10 in the weather-resistant back sheet is against the back adhesive film 4 and the thermoplastic polyolefin layer 40 in the weather-resistant back sheet is against the outside air.

It should be noted that, in this embodiment, the weather-resistant backboard is used to prepare the photovoltaic module, so that the weather resistance of the whole photovoltaic module can be improved, and meanwhile, the convenience of installing the photovoltaic module on the surface of the flexible roof is improved. The thermoplastic polyolefin layer 40 in the weather-resistant backsheet described above is disposed against the outside air, i.e., against the back adhesive film 4.

The photovoltaic module provided by the embodiment of the utility model comprises a front cover plate 1, a front adhesive film 2, a photovoltaic cell 3, a back adhesive film 4, and the weather-proof backboard, wherein the protective layer 10 in the weather-proof backboard is close to the back adhesive film 4, and the thermoplastic polyolefin layer 40 in the weather-proof backboard is close to the outside air. The weather-proof backboard at least comprises a protective layer 10, a matrix 20, an adhesive layer 30 and a thermoplastic polyolefin layer 40 which are sequentially laminated into a whole, wherein the protective layer 10 faces the inner side of the photovoltaic module, and the thermoplastic polyolefin layer 40 faces the outer side of the photovoltaic module.

According to the utility model, the outermost side of the back side of the photovoltaic module is provided with the thermoplastic polyolefin layer 40 which is matched with the external thermoplastic polyolefin waterproof coiled material, so that the convenience of the module in mounting on the surface of the flexible roof can be improved, the weather resistance of the module is ensured, the use stability of the weather-resistant backboard is improved, and the service life of the weather-resistant backboard is prolonged.

In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, so that the same or similar parts between the embodiments are referred to each other.

It should also be noted that, in this document, relationships such as first and second, etc. are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprise," "include," or any other variation thereof, are intended to cover a non-exclusive inclusion.

The foregoing has described in detail a weatherable backsheet and a photovoltaic module according to the present utility model, and specific examples have been provided herein to illustrate the principles and embodiments of the present utility model, the above examples being provided only to assist in understanding the method of the present utility model and the core ideas thereof; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present utility model, the present description should not be construed as limiting the present utility model in view of the above.

Claims (10)

1. A weatherable back sheet comprising:

Sequentially stacking an integrated protective layer, a matrix, an adhesive layer and a thermoplastic polyolefin layer;

The protective layer faces the inner side of the photovoltaic module, and the thermoplastic polyolefin layer faces the outer side of the photovoltaic module.

2. The weatherable backsheet according to claim 1, wherein the protective layer, the substrate, the adhesive layer and the thermoplastic polyolefin layer are transparent film layers.

3. The weatherable backsheet according to claim 1, wherein the substrate is a transparent PET layer.

4. The weatherable backsheet according to claim 1, wherein said protective layer is a transparent fluorine-containing protective layer.

5. The weatherable backsheet according to claim 4, wherein said transparent fluorine-containing protective layer is a transparent FEVE coating film.

6. The weatherable backsheet according to claim 1, wherein the thermoplastic polyolefin layer has a thickness of 50 to 100 microns.

7. The weatherable backsheet according to any one of claims 1 to 6, wherein the adhesive layer is a silicone adhesive layer.

8. The weatherable backsheet according to claim 7, wherein an adhesion promoting layer is disposed between the thermoplastic polyolefin layer and the silicone gum layer;

An adhesion promoting layer is arranged between the matrix and the silicone adhesive layer.

9. The weatherable backsheet according to claim 8, wherein the adhesion promoting layer is a xylene adhesion promoting layer or an ethyl acetate adhesion promoting layer.

10. A photovoltaic module, comprising:

a front cover sheet, a front adhesive film, a photovoltaic cell, a back adhesive film, and a weather-resistant back sheet according to any one of claims 1 to 9, disposed in this order;

The protective layer in the weather-proof backboard is against the back adhesive film, and the thermoplastic polyolefin layer in the weather-proof backboard is against the outside air.