CN220272483U

CN220272483U - Light photovoltaic module and photovoltaic system

Info

Publication number: CN220272483U
Application number: CN202320830808.7U
Authority: CN
Inventors: 孔国寿; 王建明; 介雷; 刘培培; 姚川朋; 周静
Original assignee: Yidao New Energy Technology Co ltd
Current assignee: Yidao New Energy Technology Co ltd
Priority date: 2023-04-07
Filing date: 2023-04-07
Publication date: 2023-12-29
Anticipated expiration: 2033-04-07

Abstract

The application discloses light photovoltaic module and photovoltaic system, light photovoltaic module includes: the composite front plate, the first packaging film layer, the battery layer, the second packaging film layer and the composite rear plate are sequentially stacked; the composite front plate and the battery layer are adhered and fixed through a first packaging film layer; the battery layer and the composite back plate are adhered and fixed through a second packaging film layer; the composite front plate comprises a first transparent plate layer and a toughened glass layer which are arranged in a laminated mode, one side of the toughened glass layer is connected with the first packaging film layer, the other side of the toughened glass layer is connected with the first transparent plate layer, and the thickness of the toughened glass layer is smaller than or equal to 2.0mm. Like this, can effectively reduce photovoltaic module's weight, also can promote the steam permeability of compound front bezel greatly, simultaneously, utilize the range upon range of composite construction of first transparent plate layer and toughened glass layer, can promote the shock resistance of compound front bezel, satisfy photovoltaic module in outdoor long-term operation demand.

Description

Light photovoltaic module and photovoltaic system

Technical Field

The application belongs to the technical field of photovoltaic modules, and particularly relates to a light photovoltaic module and a photovoltaic system.

Background

The photovoltaic module is a core part in a solar power generation system, the photovoltaic module converts light energy into electric energy through a photoelectric conversion effect, the current main current photovoltaic module is a crystalline silicon solar module and comprises polycrystal and monocrystal, the structure of the traditional photovoltaic module is glass/packaging adhesive film/battery/packaging adhesive film/backboard, and the traditional photovoltaic module is packaged by using a metal aluminum frame as a frame so as to play a supporting and fixing role. Traditional photovoltaic module weight is great to can not crooked, can't laminate and install on curved surface object, cause photovoltaic module unable to satisfy the lower application of bearing load requirement.

In the related art, in order to reduce the weight of the photovoltaic module, a polymer modified polymer composite material is adopted as a packaging front plate of the light photovoltaic module, and a metal aluminum frame is not used. Thus, although the weight of the photovoltaic module is reduced, the photovoltaic module has insufficient impact resistance and poor water vapor permeation resistance, and cannot meet the long-term outdoor use of the photovoltaic module.

Disclosure of Invention

The application aims at providing a light photovoltaic module and a photovoltaic system, which at least solve one of the problems that the light photovoltaic module in the related technology is insufficient in impact resistance and poor in water vapor permeation resistance and cannot meet the long-term outdoor use of the photovoltaic module.

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

in a first aspect, embodiments of the present application provide a lightweight photovoltaic module, including: the composite front plate, the first packaging film layer, the battery layer, the second packaging film layer and the composite rear plate are sequentially stacked;

the composite front plate and the battery layer are adhered and fixed through the first packaging film layer; the battery layer and the composite rear plate are adhered and fixed through the second packaging film layer;

the composite front plate comprises a first transparent plate layer and a toughened glass layer which are arranged in a laminated mode, one side of the toughened glass layer is connected with the first packaging film layer, the other side of the toughened glass layer is connected with the first transparent plate layer, and the thickness of the toughened glass layer is smaller than or equal to 2.0mm.

Optionally, the composite front panel further comprises: the first adhesive film layer is arranged between the first transparent plate layer and the toughened glass layer, and the first transparent plate layer is fixedly bonded with the toughened glass layer through the first adhesive film layer.

Optionally, the composite back plate comprises a first back plate layer and a metal plate layer which are stacked, one side of the first back plate layer is connected with the second packaging film layer, and the other side of the first back plate layer is connected with the metal plate layer.

Optionally, the composite back plate further comprises: the second adhesive film layer is arranged between the first back plate layer and the metal plate layer, and the first back plate layer is fixedly bonded with the metal plate layer through the second adhesive film layer.

Optionally, the metal plate layer comprises one of an aluminum foil layer and a stainless steel plate layer.

Optionally, the thickness of the metal plate layer is 1.0mm or less.

Optionally, the battery layer is one of a crystalline silicon N-type battery layer, a crystalline silicon P-type battery layer or a double-sided crystalline silicon battery layer.

Optionally, the battery layer includes a plurality of half-cut battery pieces, the half-cut battery pieces are connected in turn, and two adjacent half-cut battery pieces are connected in series or in parallel.

Optionally, at least one side of the battery layer is provided with a welding strip, and the welding strip is electrically connected with the battery layer.

In a second aspect, embodiments of the present application provide a photovoltaic system including a lightweight photovoltaic module as described in any one of the above.

In the embodiment of the application, the composite front plate formed by the first transparent plate layer and the toughened glass layer which are stacked is adopted in the light photovoltaic module, and the weight of the photovoltaic module can be effectively reduced by setting the thickness of the toughened glass layer to be less than or equal to 2.0mm. And the water vapor permeability of the toughened glass is close to zero, so that the water vapor permeability of the composite front plate can be greatly improved. Meanwhile, the laminated composite structure of the first transparent plate layer and the toughened glass layer can improve the impact resistance of the composite front plate, and meet the long-term use requirement of the photovoltaic module outdoors.

Additional aspects and advantages of the application 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 application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is an exploded view of a lightweight photovoltaic module according to an embodiment of the present application;

FIG. 2 is a top view of a lightweight photovoltaic module according to an embodiment of the present application;

FIG. 3 is a cross-sectional view of a lightweight photovoltaic module according to an embodiment of the present application, taken along line A-A in FIG. 2;

fig. 4 is a cross-sectional view of another lightweight photovoltaic module according to an embodiment of the present application, taken along line A-A in fig. 2.

Reference numerals:

100: a composite front plate; 101: a first transparent plate layer; 102: a first adhesive film layer; 103: a tempered glass layer; 200: a first encapsulation film layer; 300: a battery layer; 301: cutting half the battery piece; 400: a second encapsulation film layer; 500: a composite back plate; 501: a first rear plate layer; 502: a second adhesive film layer; 503: a metal plate layer; 600: welding a belt; h1: the thickness of the toughened glass layer; h2: thickness of the metal plate layer.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The features of the terms "first", "second", and the like in the description and in the claims of this application may be used for descriptive or implicit inclusion of one or more such features. In the description of the present application, 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 application, 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 orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

In the description of the present application, 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 terms in this application will be understood by those of ordinary skill in the art in a specific context.

The light photovoltaic module and the photovoltaic system provided by the embodiment of the application are described in detail below by means of specific embodiments and application scenes thereof with reference to the accompanying drawings.

As shown in fig. 1, a lightweight photovoltaic module according to some embodiments of the present application includes: the composite front plate 100, the first encapsulation film layer 200, the battery layer 300, the second encapsulation film layer 400 and the composite rear plate 500 are sequentially stacked; the composite front plate 100 and the battery layer 300 are adhered and fixed through the first packaging film layer 200; the battery layer 300 and the composite back plate 500 are adhered and fixed through the second packaging film layer 400; the composite front plate 100 comprises a first transparent plate layer 101 and a toughened glass layer 103 which are arranged in a laminated mode, one side of the toughened glass layer 103 is connected with the first packaging film layer 200, the other side of the toughened glass layer 103 is connected with the first transparent plate layer 101, and the thickness of the toughened glass layer 103 is smaller than or equal to 2.0mm.

In this embodiment of the application, adopt the compound front bezel 100 that first transparent plate layer 101 and toughened glass layer 103 that stacks the setting formed in the light photovoltaic module, through setting up the thickness of toughened glass layer 103 to be less than or equal to 2.0mm, can effectively reduce photovoltaic module's weight. And because the water vapor permeability of the toughened glass is close to zero, the water vapor permeability of the composite front plate 100 can be greatly improved. Meanwhile, the laminated composite structure of the first transparent plate layer 101 and the toughened glass layer 103 can improve the impact resistance of the composite front plate 100, and meet the long-term use requirement of the photovoltaic module outdoors.

Specifically, as shown in fig. 1 and 3, the composite front plate 100, the first encapsulation film layer 200, the battery layer 300, the second encapsulation film layer 400, and the composite rear plate 500 are sequentially stacked, wherein the composite front plate 100 includes a first transparent plate layer 101 and a tempered glass layer 103, and the tempered glass layer 103 is disposed on the first transparent plate layer 101 and the first encapsulation film layer 200 to form a sandwich structure, through which the impact resistance of the front plate can be greatly improved.

In some embodiments, as shown in FIG. 3, the thickness of the tempered glass layer 103 is H1 mm, satisfying 0.3.ltoreq.H2.ltoreq.1. Alternatively, the thickness H1 of the tempered glass layer 103 may be set to 0.3mm, 0.5mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm.

In this application embodiment, through setting up thickness H1 of toughened glass layer 103 less than or equal to 2mm, can keep the impact strength of toughened glass layer 103, can alleviate photovoltaic module's whole weight again, simultaneously, thinner toughened glass layer 103 still has certain bending deformation ability to make photovoltaic module can produce certain bending deformation, can use curved surface installation demand.

It can be appreciated that, generally, the first transparent board layer 101 and the first packaging film layer 200 are made of polymer materials, which have a certain ductility, the toughened glass layer 103 is disposed between the first transparent board layer 101 and the first packaging film layer 200, and a sandwich structure can be formed by the first transparent board layer 101, the toughened glass layer 103 and the first packaging film layer 200. When being impacted by external force, the toughened glass layer 103 in the sandwich structure is used as a main stressed main body, can bear larger impact force, and can disperse the impact force through the extension deformation of the first transparent plate layer 101 and the first packaging film layer 200, so that the impact resistance of the whole photovoltaic module can be greatly improved.

For example, a lightweight photovoltaic module manufactured by using 1.0mm tempered glass as the tempered glass layer 103 is tested for impact resistance by a nine-point ball drop impact method, and the impact resistance of the lightweight photovoltaic module and 3.2mm tempered glass are tested respectively, wherein the impact resistance of the lightweight photovoltaic module is 3 times or more than that of the 3.2mm tempered glass in the final test result. It can be seen that the impact resistance of the photovoltaic module can be greatly improved by forming the composite front plate 100 of the photovoltaic module from the tempered glass layer 103. Wherein, 1.0mm and 3.0mm refer to the thickness of the toughened glass respectively.

In some embodiments, the tempered glass layer 103 may be made of physical tempered glass or chemical tempered glass. Preferably, the toughened glass layer 103 can be made of chemical toughened glass, and the toughened glass layer 103 with the thickness of less than 0.1mm can be made of the chemical toughened glass, so that the weight of the photovoltaic module can be greatly reduced, and meanwhile, the impact resistance requirement of the photovoltaic module can be met due to the excellent mechanical property of the chemical toughened glass.

In some embodiments, as shown in fig. 2, the first transparent sheet layer 101 may include a fluorine-containing material layer and a supporting material layer to provide the first transparent sheet layer 101 with superior electrical insulation and weather resistance.

The support material layer may be made of polyethylene terephthalate (Polyethylene Glycol Terephthalate, PET), fiber resin, polycarbonate (PC), polybutylene terephthalate (PBT), or the like.

Wherein, the fluorine-containing material layer can be selected from: fluorine-containing coating, ethylene-tetrafluoroethylene copolymer (ETFE), polyvinylidene fluoride (Polyvinylidene Difluoride, PVDF), and the like.

The first transparent board layer 101 is configured as a composite layered structure, and may be configured as a structure type such as TPT, KPF, KPK, KPE, CPC.

In some embodiments, the first encapsulation film 200 may be made of a high-permeability material. The high-transmittance material means that the light transmittance of the material is higher, specifically, the light transmittance of the first packaging film layer 200 is greater than or equal to 88%, so that light can better penetrate through the first packaging film layer 200 and enter the battery layer 300, so as to improve the sunlight receiving rate of the battery layer, and further improve the power generation efficiency of the photovoltaic module.

Alternatively, the first encapsulating film 200 may be selected from ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (Polyolefin elastomer, POE), polyvinyl butyral (Polyvinyl butyral, PVB). In the production and manufacture of the photovoltaic module, the first encapsulation film layer 200 is thermally crosslinked by hot pressing the photovoltaic module, so that the battery layer 300 and the composite front plate 100 are adhered and fixed together.

Optionally, the thickness of the first encapsulation film 200 is 400-600 μm. Specifically, the thickness of the second encapsulation film 400 may be set to a range between any two values of 400 μm, 450 μm, 500 μm, 550 μm, 600 μm, etc.

In some embodiments, the second encapsulation film 400 may be made of a high-cutoff material. The high-cut-off material means that the light transmittance of the material is lower, specifically, the light transmittance of the second packaging film layer 400 is less than or equal to 30%, so that the light transmittance can be reduced by arranging the second packaging film layer 400, so that the battery layer 300 can receive more sunlight, and the power generation efficiency of the photovoltaic module is improved.

Alternatively, as shown in fig. 3, the second encapsulating film 400 may be selected from ethylene-vinyl acetate (EVA), polyolefin elastomer (Polyolefin elastomer, POE), polyvinyl alcohol Ding Quanzhi (Polyvinyl butyral, PVB). In the production and manufacture of the photovoltaic module, the second encapsulation film 400 is thermally crosslinked by hot pressing the photovoltaic module, so that the battery layer 300 and the composite back plate 500 are adhered and fixed together.

Alternatively, as shown in fig. 3, the thickness of the second encapsulation film 400 is 400 to 600 μm. Specifically, the thickness of the second encapsulation film 400 may be set to a range between any two values of 400 μm, 450 μm, 500 μm, 550 μm, 600 μm, etc.

Optionally, as shown in fig. 4, the composite front panel 100 further includes: the first adhesive film layer 102, the first adhesive film layer 102 is arranged between the first transparent plate layer 101 and the toughened glass layer 103, and the first transparent plate layer 101 is adhered and fixed with the toughened glass layer 103 through the first adhesive film layer 102.

In this embodiment of the present application, through setting up first glued membrane layer 102 between first transparent plate layer 101 and toughened glass layer 103, first transparent plate layer 101 is fixed through first glued membrane layer 102 and toughened glass layer 103 bonding, can increase the cohesion of first glued membrane layer 102 and toughened glass layer 103 to when compound front bezel 100 receives external force impact, through the extension deformation of first transparent plate layer 101 and first glued membrane layer 102, can release local stress, thereby promote the shock resistance of whole compound front bezel 100. Meanwhile, through the bonding effect of the first adhesive film layer 102, even when the toughened glass layer 103 is broken, the toughened glass layer 103 and the first transparent plate layer 101 can be effectively combined together, so that the protection effect of the composite front plate 100 on the battery layer 300 is ensured.

In some embodiments, as shown in fig. 4, the first adhesive film layer 102 may be selected from ethylene-vinyl acetate copolymer (Ethylene Vinyl Acetate Copolymer, EVA), polyolefin elastomer (POE), polyvinyl butyral (polyvinyl butyral, PVB), and the like. Wherein the polyolefin elastomer may comprise an ethylene-octene copolymer or an ethylene-butene copolymer.

Alternatively, as shown in fig. 4, the composite back plate 500 includes a first back plate layer 501 and a metal plate layer 503 that are stacked, one side of the first back plate layer 501 is connected to the second encapsulation film layer, and the other side of the first back plate layer 501 is connected to the metal plate layer 503.

In this embodiment of the application, the first back plate layer 501 and the metal plate layer 503 that are stacked to form the composite back plate 500 can increase the environmental erosion resistance and mechanical stability of the composite back plate 500, and since the moisture vapor transmission rate of the metal plate layer 503 is zero or close to zero, the moisture vapor transmission resistance of the photovoltaic module formed by packaging the composite back plate 500 can be improved.

Optionally, as shown in fig. 4, the composite back plate 500 further includes: the second adhesive film layer 502, the second adhesive film layer 502 is disposed between the first back plate layer 501 and the metal plate layer 503, and the first back plate layer 501 is adhered and fixed with the metal plate layer 503 through the second adhesive film layer 502.

In this embodiment of the application, set up second glued membrane layer 502 between first back plate layer 501 and metal sheet layer 503 at second glued membrane layer 502, bond fixed with first back plate layer 501 and metal sheet layer 503 through second glued membrane layer 502, can increase the whole mechanical strength of compound back plate 500, promote the guard action of compound back plate 500 to battery layer 300 in the photovoltaic module.

In some embodiments, as shown in fig. 4, the second adhesive film layer 502 may be selected from ethylene-vinyl acetate copolymer (Ethylene Vinyl Acetate Copolymer, EVA), polyolefin elastomer (Polyolefin Elastomer, POE), polyvinyl butyral (Polyvinyl Butyral, PVB), and the like. Wherein the polyolefin elastomer may comprise an ethylene-octene copolymer or an ethylene-butene copolymer.

Alternatively, as shown in fig. 3, the metal plate layer 503 includes one of an aluminum foil layer and a stainless steel plate layer. In the embodiment of the application, the metal plate layer 503 is set to be an aluminum foil layer or a stainless steel plate layer, so that the use requirement of the composite back plate 500 can be met, the production cost can be reduced, and the whole weight of the photovoltaic module can be reduced.

It should be noted that, the metal plate layer 503 in the embodiment of the present application may be a plate layer structure made of other metal materials, and those skilled in the art may set the metal plate layer according to actual needs, which is not limited herein.

Alternatively, as shown in fig. 4, the thickness H2 of the metal plate layer 503 is 1.0mm or less. Specifically, the thickness H2 of the metal plate layer 503 may be set as: 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm.

In this application embodiment, through setting up thickness H2 of sheet metal layer 503 and being less than or equal to 1.0mm, when satisfying the mechanical properties requirement of compound back plate 500, can reduce whole photovoltaic module's weight to, adopt thinner sheet metal layer 503 to constitute compound back plate 500, can produce certain flexible deformation, so that make photovoltaic module can satisfy curved surface installation demand.

In some embodiments, the thickness H2 of the metal plate layer 503 may be set to 0.5mm or less. Of course, the thickness H2 of the metal plate layer 503 may also be set to other thickness values, and in practical applications, the thickness H2 of the metal plate layer 503 may be determined according to the design requirement of the photovoltaic module and the specific material of the metal plate layer 503, which is not limited herein.

Alternatively, as shown in fig. 1, the battery layer 300 is one of a crystalline silicon N-type battery layer, a crystalline silicon P-type battery layer, or a bifacial crystalline silicon battery layer. In the embodiment of the application, the battery layer 300 is arranged to form light photovoltaic modules with different structures so as to meet different use requirements of use scenes.

In some embodiments, the crystalline silicon N-type battery layer may be made of an N-type crystalline silicon material, which may specifically include: tunneling oxide passivation contact (Tunnel Oxide Passivated Contact solar cell, TOPCon) cells, heterojunction (Heterojunction with Intrinsic Thinfilm, HIT) cells, or all back electrode contact (IBC) cells, etc.

In some embodiments, the P-type crystalline silicon cell layer may be made of P-type crystalline silicon material, which may specifically include: a back Passivation (PERC) cell, an aluminum back field (BSF) cell, etc.

In some embodiments, the double-sided crystalline silicon cell layer may be made of N-type and P-type crystalline silicon materials, which may specifically include: an N-type PERT cell, an N-type HJT cell, an N-type IBC cell, a P-type PERC double-sided cell, etc.

Alternatively, as shown in fig. 2, the battery layer 300 includes a plurality of half-cut battery pieces 301, the plurality of half-cut battery pieces 301 are sequentially connected, and two adjacent half-cut battery pieces 301 are connected in series or in parallel.

In the embodiment of the application, the battery layer 300 is formed by mutually connecting the plurality of half-cut battery pieces 301, and the photovoltaic module is manufactured by the battery layer 300, so that the power loss of the photovoltaic module can be reduced, the packaging efficiency and the filling factor of the photovoltaic module are improved, and the conversion efficiency of the wide photovoltaic module is improved.

Specifically, the half-cut cell 301 is a half-cut cell obtained by cutting a full-sheet solar cell into two identical half-sheets in a direction perpendicular to the main grid line thereof.

Optionally, a plurality of solder strips 600 are laid on at least one side of the battery layer 300, the solder strips 600 are electrically connected with the battery layer 300, and serial connection or parallel connection between different battery pieces in the battery layer 300 can be realized by arranging the plurality of solder strips 600, so that carriers generated by the photovoltaic action of the battery pieces can be collected conveniently.

Referring to fig. 4, in some embodiments, a lightweight photovoltaic module can include: the first transparent plate layer 101 of TPT, the first glued membrane layer 102 of POE, 0.55mm toughened glass layer 103, POE encapsulation rete 200, IBC battery layer 300, POE encapsulation rete 400, the first back plate layer 501 of CPC, EVA second glued membrane layer 502 and aluminium foil layer 503 of connection of stack gradually.

Referring to fig. 4, in other embodiments, a lightweight photovoltaic module may include: the KPK type transparent plate layer 101, the POE type first adhesive film layer 102, the 0.55mm toughened glass layer 103, the POE packaging film layer 200, the TOPCO battery layer 300, the POE packaging film layer 400, the CPC type first rear plate layer 501, the EVA type second adhesive film layer 502 and the aluminum foil layer 503 are sequentially connected in a laminated mode.

Referring to fig. 4, in other embodiments, a lightweight photovoltaic module may include: KPE type first transparent plate layer 101, POE first glued membrane layer 102, 0.55mm toughened glass layer 103, POE encapsulation rete 200, PERC battery layer 300, POE encapsulation rete 400, CPC type first back plate layer 501, EVA second glued membrane layer 502 and aluminium foil layer 503 that connect in proper order stack.

Optionally, the embodiment of the present application further provides a photovoltaic system, which includes the light photovoltaic module in the above embodiment.

Wherein, light photovoltaic module includes: the composite front plate 100, the first encapsulation film layer 200, the battery layer 300, the second encapsulation film layer 400 and the composite rear plate 500 are sequentially stacked; the composite front plate 100 and the battery layer 300 are adhered and fixed through the first packaging film layer 200; the battery layer 300 and the composite back plate 500 are adhered and fixed through the second packaging film layer 400; the composite front plate 100 comprises a first transparent plate layer 101 and a toughened glass layer 103 which are arranged in a laminated mode, one side of the toughened glass layer 103 is connected with the first packaging film layer 200, the other side of the toughened glass layer 103 is connected with the first transparent plate layer 101, and the thickness of the toughened glass layer 103 is smaller than or equal to 2.0mm.

It should be noted that the lightweight photovoltaic module in the embodiments of the present application may include the lightweight photovoltaic module in any of the embodiments, and specific structures of the lightweight photovoltaic module may be referred to in the foregoing description, which is 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 present application. 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 application 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 principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A lightweight photovoltaic module, comprising: the composite front plate, the first packaging film layer, the battery layer, the second packaging film layer and the composite rear plate are sequentially stacked;

2. The lightweight photovoltaic module of claim 1, wherein the composite front sheet further comprises: the first adhesive film layer is arranged between the first transparent plate layer and the toughened glass layer, and the first transparent plate layer is fixedly bonded with the toughened glass layer through the first adhesive film layer.

3. The lightweight photovoltaic module of claim 1, wherein the composite back sheet comprises a first back sheet layer and a metal sheet layer in a stacked arrangement, one side of the first back sheet layer being connected to the second encapsulant film layer, the other side of the first back sheet layer being connected to the metal sheet layer.

4. The lightweight photovoltaic module according to claim 3, wherein the composite back sheet further comprises: the second adhesive film layer is arranged between the first back plate layer and the metal plate layer, and the first back plate layer is fixedly bonded with the metal plate layer through the second adhesive film layer.

5. The lightweight photovoltaic module according to claim 3, wherein the metal sheet layer comprises one of an aluminum foil layer, a stainless steel sheet layer.

6. The lightweight photovoltaic module of claim 3, wherein the thickness of the metal sheet layer is 1.0mm or less.

7. The lightweight photovoltaic module of claim 1, wherein the cell layer is one of a crystalline silicon N-type cell layer, a crystalline silicon P-type cell layer, or a bifacial crystalline silicon cell layer.

8. The lightweight photovoltaic module of claim 1, wherein the cell layer comprises a plurality of half-cut cells connected in series or parallel between two adjacent half-cut cells.

9. The lightweight photovoltaic module of claim 1, wherein at least one side of the cell layer is provided with solder strips, the solder strips being electrically connected to the cell layer.

10. A photovoltaic system comprising a lightweight photovoltaic module as claimed in any one of claims 1 to 9.