CN220086060U

CN220086060U - Light photovoltaic module and photovoltaic system

Info

Publication number: CN220086060U
Application number: CN202320399563.7U
Authority: CN
Inventors: 周静; 介雷; 姚川朋; 刘培培; 李倩倩
Original assignee: Yidao New Energy Technology Co ltd
Current assignee: Yidao New Energy Technology Co ltd
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-11-24
Anticipated expiration: 2033-02-27

Abstract

The utility model discloses a light photovoltaic module, which comprises a front plate, a first packaging layer, a battery piece, a second packaging layer and a back plate which are sequentially arranged, wherein the front plate comprises a film substrate layer, the film substrate layer is arranged on the surface, far away from the battery piece, of the first packaging layer, an oxide coating is arranged on the surface, far away from the first packaging layer, of the film substrate layer, and the oxide coating is used for blocking water vapor. Like this, can play the effect of separation steam through film substrate and oxide cladding material, reduce the water penetration of front bezel, reduce the probability that the battery piece meets steam corruption, avoid light photovoltaic module to influence its generating efficiency because of the battery piece corruption.

Description

Light photovoltaic module and photovoltaic system

Technical Field

The utility model relates to the technical field of photovoltaics, in particular to a light photovoltaic module and a photovoltaic system.

Background

The photovoltaic module is a core part in a solar power generation system, and is used for converting solar energy into electric energy, or sending the electric energy into a storage battery for storage, or pushing a load to work. The light photovoltaic module is characterized in that glass on the front side of the module is replaced by a polymer composite material, so that the overall weight of the photovoltaic module is effectively reduced.

In the related art, the common polymer composite material is a fluorine film or a composite material of the fluorine film and a PET material, but the water permeability of the two polymer composite materials is large, and under the damp and hot condition, water vapor is easy to permeate from the front surface of the photovoltaic module, so that the corrosion of a battery piece in the photovoltaic module is caused by the reaction of the water vapor and acetic acid in the module packaging adhesive film, and the power generation efficiency of the photovoltaic module is reduced.

Disclosure of Invention

The utility model aims to provide a light photovoltaic module and a photovoltaic system, which at least solve the problems of low power generation efficiency caused by large water permeability and easy corrosion of the light photovoltaic module in the related technology.

In order to solve the technical problems, the utility model is realized as follows:

in a first aspect, an embodiment of the present utility model provides a lightweight photovoltaic module, where the lightweight photovoltaic module includes a front plate, a first packaging layer, a battery piece, a second packaging layer, and a back plate that are sequentially disposed;

the front plate comprises a film substrate layer, the film substrate layer is arranged on the surface, far away from the battery piece, of the first packaging layer, an oxide coating is arranged on the surface, far away from the first packaging layer, of the film substrate layer, and the oxide coating is used for blocking water vapor.

Optionally, the oxide coating has a thickness in a range of greater than or equal to 5 nanometers and less than or equal to 100 nanometers.

Optionally, the thickness of the thin film substrate layer ranges from greater than or equal to 5 microns to less than or equal to 15 microns.

Optionally, the oxide coating is made of one of alumina or silica.

Optionally, the first packaging layer and the second packaging layer are both polyolefin elastomer adhesive films.

Optionally, the first encapsulation layer and the second encapsulation layer each have a grammage range of greater than or equal to 100 grams per square meter and less than or equal to 600 grams per square meter.

Optionally, the front plate further comprises a front plate protection layer and a front plate support layer;

the front plate protection layer is arranged on the surface of the oxide coating, which is far away from the film substrate layer, the front plate support layer is arranged on the surface of the film substrate layer, which is close to the first packaging layer, the front plate protection layer is used for protecting the light photovoltaic module, and the front plate support layer is used for improving the strength of the light photovoltaic module.

Optionally, a first adhesive layer is disposed between the film substrate layer and the front plate supporting layer, and the first adhesive layer is used for adhering the film substrate layer and the front plate supporting layer.

Optionally, a second bonding layer is arranged between the front plate supporting layer and the first packaging layer, the second bonding layer is a fluorine-containing coating, and the second bonding layer is used for bonding the front plate supporting layer and the first packaging layer.

Compared with the prior art, the lightweight photovoltaic module provided by the utility model has at least the following advantages:

in the embodiment of the utility model, the lightweight photovoltaic module comprises a front plate, a first packaging layer, a battery piece, a second packaging layer and a back plate which are sequentially arranged, wherein the front plate comprises a film substrate layer, the film substrate layer is arranged on the surface, far away from the battery piece, of the first packaging layer, an oxide coating is arranged on the surface, far away from the first packaging layer, of the film substrate layer, and the oxide coating is used for blocking water vapor. Like this, can play the effect of separation steam through film substrate and oxide cladding material, reduce the water penetration of front bezel, reduce the probability that the battery piece meets steam corruption, avoid light photovoltaic module to influence its generating efficiency because of the battery piece corruption.

In a second aspect, the present utility model provides a photovoltaic system comprising at least one lightweight photovoltaic module of any of the above.

The photovoltaic system and the lightweight photovoltaic module have the same advantages compared with the prior art, and are not described in detail herein.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of a lightweight photovoltaic module according to an embodiment of the present utility model;

fig. 2 is a schematic view of a front plate of a lightweight photovoltaic module according to an embodiment of the present utility model.

Reference numerals:

1-a front plate; 2-a first encapsulation layer; 3-cell sheets; 4-a second encapsulation layer; 5-a back plate; 11-a thin film substrate layer; 12-oxide plating; 13-a front plate protective layer; 14-a front plate support layer; 15-a first adhesive layer; 16-a second adhesive layer; a-direction of illumination.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model. 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 features of the utility model "first", "second" and the like in the description and in the claims may be used for the explicit or implicit inclusion of one or more such features. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate or are based on the orientation or relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The following describes a light photovoltaic module according to an embodiment of the present utility model in detail with reference to the accompanying drawings.

Referring to fig. 1, a schematic diagram of a lightweight photovoltaic module provided by the embodiment of the utility model is shown, as shown in fig. 1, the lightweight photovoltaic module includes a front plate 1, a first packaging layer 2, a battery piece 3, a second packaging layer 4 and a back plate 5 which are sequentially arranged, the front plate 1 includes a film substrate layer 11, the film substrate layer 11 is arranged on the surface of the first packaging layer 2 far away from the battery piece 3, an oxide plating layer 12 is arranged on the surface of the film substrate layer 11 far away from the first packaging layer 2, and the oxide plating layer 12 is used for blocking water vapor. Like this, can play the effect of separation steam through film substrate and oxide cladding material, reduce the water penetration of front bezel, reduce the probability that the battery piece meets steam corruption, avoid light photovoltaic module to influence its generating efficiency because of the battery piece corruption.

Specifically, in the embodiment of the utility model, according to the illumination direction a of the sun, the first layer in the light photovoltaic module is the front plate 1, the second layer is the first packaging layer 2, the third layer is the battery piece 3, the fourth layer is the second packaging layer 4, the fifth layer is the back plate 5 and the total of five layers, so that the light photovoltaic module has fewer layers, and the process is simpler compared with the process of the photovoltaic module with more layers in production and manufacture.

In the embodiment of the present utility model, the front plate 1 is a transparent light front plate, and the thickness of the front plate 1 ranges from 130 micrometers or more to 770 micrometers or less. The front plate 1 comprises a film substrate layer 11, the film substrate layer 11 is arranged on the surface of the first packaging layer 2 far away from the battery piece 3, and an oxide plating layer 12 is arranged on the surface of the film substrate layer 11 far away from the first packaging layer 2. The film substrate layer 11 is a low water-permeability film substrate, and the material of the film substrate layer 11 may be polyethylene terephthalate (PET) or co-extruded propylene oxide (co-extruded PO).

In the embodiment of the present utility model, the oxide coating 12 may be evaporated onto the surface of the film substrate layer 11 by a vacuum evaporation method, which specifically includes: the metal or metalloid is melted and evaporated at high temperature in a high vacuum state, so that the metal or metalloid vapor is deposited and accumulated on the surface of the film substrate layer 11, and a metal/metalloid oxide coating is attached to the surface of the film substrate layer 11, so that the film substrate layer with the metal/metalloid oxide coating has the characteristics of a plastic film and the characteristic of blocking water vapor by the metal, and the vapor deposition process is adopted, so that the vapor deposited metal oxide is very thin, the thickness is about tens of nanometers, the light transmittance of the front plate 1 is not influenced, and the power generation efficiency of the light photovoltaic module is not negatively influenced.

In the embodiment of the present utility model, the first encapsulation layer 2 and the second encapsulation layer 4 may be polyolefin elastomer (POE) adhesive films, or may be polyvinyl butyral Ding Quanzhi (PVB) adhesive films or ethylene-vinyl acetate copolymer (EVA) adhesive films, which are not limited herein. The battery plate 3 may be a P-type battery plate or an N-type battery plate, and is not limited herein. The backboard 5 is a light backboard, and comprises a backboard protection layer, a backboard supporting layer and a metal layer in sequence according to the illumination direction a of the sun, wherein the metal layer is used for blocking water vapor on the back of the light photovoltaic module.

Alternatively, in embodiments of the present utility model, the oxide coating 12 has a thickness in the range of greater than or equal to 5 nanometers and less than or equal to 100 nanometers. Therefore, the oxide plating layer with the thickness range of more than or equal to 5 nanometers and less than or equal to 100 nanometers is adopted, so that on one hand, the effect of blocking water vapor can be achieved, and on the other hand, the light transmittance of the front plate can not be influenced.

Specifically, in the embodiment of the present utility model, since the oxide coating layer 12 is evaporated on the film substrate layer 11 by vacuum evaporation, the thickness of the oxide coating layer 12 is generally thinner, and in the embodiment of the present utility model, the thickness range of the oxide coating layer 12 is generally greater than or equal to 5 nm and less than or equal to 100 nm, for example: the thickness of the oxide plating layer 12 may be 20 nm, 40 nm, 60 nm, 80 nm, etc., without limitation. Therefore, on one hand, the light photovoltaic module has the function of blocking water vapor, and on the other hand, the light photovoltaic module has high light transmittance and cannot influence the power generation efficiency of the light photovoltaic module.

Alternatively, in embodiments of the present utility model, the thickness of the thin film substrate layer 11 ranges from greater than or equal to 5 microns to less than or equal to 15 microns. The film substrate layer has lighter weight, and on one hand, the film substrate layer has the function of blocking water vapor with an oxide coating deposited on the surface of the film substrate layer, and on the other hand, the film substrate layer is favorable for reducing the weight of the light photovoltaic module, so that the light photovoltaic module is light.

In the embodiment of the present utility model, the film substrate layer 11 may be a polymer composite material, and the polymer composite material has the advantage of light weight. Specifically, the material of the film substrate layer 11 may be polyethylene terephthalate (PET) or co-extruded propylene oxide (co-extruded PO). The thickness of the thin film substrate layer 11 may range from greater than or equal to 5 microns to less than or equal to 15 microns, for example: 6 microns, 8 microns, 10 microns, 12 microns, 14 microns, etc., without limitation. Thus, the weight of the light photovoltaic module can be effectively reduced, and the light photovoltaic module is light.

Alternatively, in the embodiment of the present utility model, the material of the oxide plating layer 12 may be one of alumina or silica. Thus, the aluminum oxide or silicon oxide is adopted as the oxide coating, so that the high water blocking property of the aluminum oxide or silicon oxide can be utilized, the capability of blocking water vapor of the front plate of the light photovoltaic module is improved, and the power generation efficiency of the light photovoltaic module is further improved.

Specifically, in the embodiment of the present utility model, the oxide coating 12 may be made of aluminum oxide or silicon oxide, which has a good water resistance, so that water vapor can be effectively prevented from entering the light photovoltaic module from the front surface of the light photovoltaic module, thereby causing corrosion of the battery cells of the light photovoltaic module and affecting the power generation efficiency of the light photovoltaic module.

Optionally, in the embodiment of the present utility model, the first encapsulation layer 2 and the second encapsulation layer 4 are both polyolefin elastomer adhesive films. Therefore, as no acidic corrosive substance exists in the polyolefin elastomer adhesive film, the problem that the battery piece of the light photovoltaic module is corroded due to the fact that water vapor reacts with substances such as acetic acid in the packaging material can be avoided from the aspect of reaction raw materials.

Specifically, in the embodiment of the present utility model, both the first encapsulation layer 2 and the second encapsulation layer 4 may be low corrosion polyolefin elastomer (POE) adhesive films. The POE adhesive film is a high-performance polyolefin adhesive film, has rubber elasticity at normal temperature, and has the characteristics of small density, large bending, high low-temperature shock resistance, easiness in processing, reusability and the like. No acid monomer is introduced in the synthesis of the POE adhesive film, and no polarity exists, so that no acid gas is released. The POE adhesive film is adopted as the first packaging layer 2 and the second packaging layer 4, so that acidic substances exist in the light photovoltaic module, and the problem that the battery piece of the light photovoltaic module is easy to corrode due to the reaction of water vapor and the acidic substances is avoided.

In the embodiment of the utility model, the first packaging layer 2 may be a low-corrosion high-transmittance POE adhesive film, which has higher transmittance, and can enable more sunlight to irradiate the cell area, so that the power generation efficiency of the lightweight photovoltaic module can be effectively improved.

In the embodiment of the utility model, the second encapsulation layer 4 is a low-corrosion high-cut-off POE adhesive film, and the low-corrosion high-cut-off POE has higher ultraviolet cut-off capability than the low-corrosion high-transmission POE, so that after sunlight irradiates the battery piece, more ultraviolet rays are cut off before reaching the light backboard, and the light backboard can be better protected.

Alternatively, in an embodiment of the present utility model, the grammage range of each of the first encapsulation layer 2 and the second encapsulation layer 4 is greater than or equal to 100 grams per square meter and less than or equal to 600 grams per square meter. Therefore, the weight of the light photovoltaic module can be effectively reduced, and the packaging of the battery piece is not influenced, so that the light photovoltaic module is light.

Specifically, in the embodiment of the present utility model, the grammage range of each of the first encapsulation layer 2 and the second encapsulation layer 4 is greater than or equal to 100 grams per square meter and less than or equal to 600 grams per square meter, for example: 200 grams per square meter, 300 grams per square meter, 400 grams per square meter, 500 grams per square meter, etc., without limitation herein. Therefore, the weight of the light photovoltaic module can be effectively reduced, and the packaging of the battery piece is not influenced, so that the light photovoltaic module is light.

Optionally, in the embodiment of the present utility model, the front plate 1 further includes a front plate protection layer 13 and a front plate support layer 14, the front plate protection layer 13 is disposed on a surface of the oxide plating layer 12 away from the film substrate layer 11, the front plate support layer 14 is disposed on a surface of the film substrate layer 11 close to the first encapsulation layer 2, the front plate protection layer 13 is used for protecting the light photovoltaic module, and the front plate support layer 14 is used for improving strength of the light photovoltaic module. Like this, can protect through the front bezel protective layer that is located the outside light photovoltaic module, avoid oxide coating direct exposure to the air to be corroded, through the front bezel supporting layer that is located between film substrate layer and the first encapsulation layer, can support light photovoltaic module, improve light photovoltaic module's intensity.

Specifically, referring to fig. 2, a schematic diagram of a front panel of a lightweight photovoltaic module according to an embodiment of the present utility model is shown, as shown in fig. 2, in the embodiment of the present utility model, according to an illumination direction a of the sun, a first layer of the front panel 1 is a front panel protection layer 13, a second layer is an oxide plating layer 12, a third layer is a film substrate layer 11, and a fourth layer is a front panel support layer 14. The front plate protection layer 13 is disposed on the surface of the oxide plating layer 12 away from the film substrate layer 11, where the thickness range of the front plate protection layer 13 may be greater than or equal to 10 micrometers and less than or equal to 100 micrometers, and the front plate protection layer 13 is used for protecting the front surface of the light photovoltaic module.

In the embodiment of the present utility model, the front plate protective layer 13 may be a fluorine-containing coating layer or a fluorine film. In the case where the protective layer 13 is a fluorine-containing coating layer, the fluorine-containing coating layer is applied to the surface of the oxide plating layer 12 remote from the thin film substrate layer 11; in the case that the protective layer 13 is a fluorine film, the fluorine film is adhered to the surface of the oxide coating 12 far from the film substrate layer 11 by glue, wherein the glue may be polyurethane glue or acrylic glue, the thickness of the glue may be greater than or equal to 5 micrometers and less than or equal to 15 micrometers, and the glue is used for adhering the front plate protective layer 13 and the oxide coating 12.

The material of the front protective layer 13 may be polyvinyl fluoride (PVF), ethylene-tetrafluoroethylene copolymer (ETFE), ethylene-chlorotrifluoroethylene alternating copolymer (ECTFE), polyvinylidene fluoride (PVDE), etc., which is not limited herein.

In the embodiment of the present utility model, the front plate support layer 14 is a lightweight front plate support layer, and the thickness of the front plate support layer 4 may range from greater than or equal to 100 micrometers to less than or equal to 600 micrometers. The material of the front supporting layer 14 may be co-extruded propylene oxide (co-extruded PO) or polyethylene terephthalate (PET), wherein the water permeability of the co-extruded PO material is 9.8 g/(. Square.day), and the water permeability of the PET material is 27.3 g/(. Square.day).

Alternatively, in the embodiment of the present utility model, a first adhesive layer 15 is provided between the film base material layer 11 and the front plate support layer 14, and the first adhesive layer 15 is used to adhere the film base material layer 11 and the front plate support layer 14. In this way, the film substrate layer can be bonded to the front plate support layer through the first bonding layer to improve the structural stability of the lightweight photovoltaic module.

Specifically, in the embodiment of the present utility model, the first adhesive layer 15 is provided between the film base material layer 11 and the front plate support layer 14. The first adhesive layer 15 may be glue, through which the film substrate layer 11 and the front plate support layer 14 are adhered together, the glue may be polyurethane glue or acrylic glue, and the thickness of the glue may be in a range of greater than or equal to 5 micrometers and less than or equal to 15 micrometers.

Optionally, in the embodiment of the present utility model, a second adhesive layer 16 is disposed between the front board support layer 14 and the first packaging layer 2, where the second adhesive layer 16 is a fluorine-containing coating, and the second adhesive layer 16 is used to bond the front board support layer 14 and the first packaging layer 2. In this way, the front plate supporting layer and the first packaging layer can be bonded through the second bonding layer, so that the structural stability of the light photovoltaic module is improved.

Specifically, in the embodiment of the present utility model, a second adhesive layer 16 is disposed between the front board supporting layer 14 and the first packaging layer 2, the second adhesive layer 16 may be a fluorine-containing coating, where the fluorine-containing coating is coated on the surface of the front board supporting layer 14 near the first packaging layer 2, and the second adhesive layer 16 is used for adhering the front board supporting layer 14 and the first packaging layer 2. The thickness of the fluorine-containing coating layer may be greater than or equal to 5 micrometers and less than or equal to 15 micrometers, and the material of the fluorine-containing coating layer may be polyvinyl fluoride (PVF), ethylene-tetrafluoroethylene copolymer (ETFE), ethylene-chlorotrifluoroethylene alternating copolymer (ECTFE), polyvinylidene fluoride (PVDE), etc., which are not limited herein. .

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. The light photovoltaic module is characterized by comprising a front plate, a first packaging layer, a battery piece, a second packaging layer and a back plate which are sequentially arranged;

2. The lightweight photovoltaic module of claim 1, wherein the oxide coating has a thickness in the range of greater than or equal to 5 nanometers and less than or equal to 100 nanometers.

3. The lightweight photovoltaic module of claim 1, wherein the film substrate layer has a thickness in the range of greater than or equal to 5 microns and less than or equal to 15 microns.

4. The lightweight photovoltaic module according to claim 1, wherein the oxide coating is one of aluminum oxide or silicon oxide.

5. The lightweight photovoltaic module of claim 1, wherein the first and second encapsulant layers are each a polyolefin elastomer film.

6. The lightweight photovoltaic module of claim 5, wherein the first and second encapsulant layers each have a grammage range of greater than or equal to 100 grams per square meter and less than or equal to 600 grams per square meter.

7. The lightweight photovoltaic module of claim 1, wherein the front sheet further comprises a front sheet protective layer and a front sheet support layer;

8. The lightweight photovoltaic module of claim 7, wherein a first adhesive layer is disposed between the film substrate layer and the front sheet support layer, the first adhesive layer being used to adhere the film substrate layer and the front sheet support layer.

9. The lightweight photovoltaic module of claim 7, wherein a second adhesive layer is disposed between the front plate support layer and the first encapsulant layer, the second adhesive layer being a fluorine-containing coating, the second adhesive layer being configured to adhere the front plate support layer and the first encapsulant layer.

10. A photovoltaic system, characterized in that it comprises at least one lightweight photovoltaic module according to any one of claims 1 to 9.