Photovoltaic module

Abstract

The utility model relates to the technical field of photovoltaic modules, in particular to a photovoltaic module. The photovoltaic module comprises a back plate, a battery piece and front glass, a release film is arranged between the back plate and the front glass, and the battery piece is wrapped by the release film; easy-to-pull glue is arranged on two opposite sides of the release film, two opposite sides of the easy-to-pull glue are respectively adhered to the back plate and the front glass, and the release film is sealed by the easy-to-pull glue. The release film is arranged, the upper surface, the lower surface and the peripheral side surface of the battery piece are completely wrapped by the release film, and no adhesive is arranged between the release film and the battery piece, so that an operator can conveniently separate the release film from the battery piece in the later photovoltaic module recycling process, and the photovoltaic module is easier to disassemble and convenient to recycle; the cost is saved. In the later photovoltaic module recycling process, an operator can conveniently pull and tear the easy-to-pull adhesive, then the release film and the battery piece can be separated, the operation procedure is simple, and the disassembling efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic components, in particular to a photovoltaic component. Background Art

[0002] Photovoltaic modules are generally made of a large amount of recyclable materials. Therefore, dismantling and recycling waste photovoltaic modules can not only save resources and reduce costs, but also reduce pollution to the environment.

[0003] The basic structure of existing photovoltaic modules consists of a stacked structure consisting of back glass, back film, cells, front film, and back glass. The back and front films not only seal the cells but also tightly bond them to the back and front glass. This makes it difficult to completely separate the cells from the film during recycling, increasing the difficulty and cost of disassembling the modules.

[0004] Therefore, it is urgent to design a photovoltaic module to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a photovoltaic module that is easy to disassemble and recycle, thereby saving costs.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The utility model provides a photovoltaic module, comprising a back plate, a release film, a battery cell, an easy-to-pull adhesive and a front glass. A release film is provided between the back plate and the front glass, and the release film wraps the battery cell; easy-to-pull adhesives are provided on opposite sides of the release film, and the opposite sides of the easy-to-pull adhesives are respectively adhered to the back plate and the front glass, and the easy-to-pull adhesives seal the release film.

[0008] As an optional technical solution for a photovoltaic module, the release film includes a first release layer and a second release layer, and the solar cell is wrapped between the first release layer and the second release layer.

[0009] As an optional technical solution for a photovoltaic module, a first substrate layer is provided on the side of the first release layer facing away from the battery cell, and the first substrate layer is adhesively connected to the front glass; a second substrate layer is provided on the side of the second release layer facing away from the battery cell, and the second substrate layer is adhesively connected to the back panel.

[0010] As an optional technical solution for a photovoltaic module, the easy-to-pull adhesive includes a first adhesive layer, a second adhesive layer and a third substrate layer. The third substrate layer is arranged between the first adhesive layer and the second adhesive layer. One side of the first adhesive layer is bonded to the front glass, and the other side is bonded to the third substrate layer; one side of the second adhesive layer is bonded to the back panel, and the other side is bonded to the third substrate layer.

[0011] As an optional technical solution of a photovoltaic module, the side of the first adhesive layer away from the release film and the side of the second adhesive layer away from the release film are both flush with the side edge of the front glass.

[0012] As an optional technical solution for a photovoltaic module, a side of the third substrate layer away from the release film protrudes beyond the first adhesive layer and the second adhesive layer.

[0013] As an optional technical solution for a photovoltaic module, the photovoltaic module further includes a positive adhesive film and a negative adhesive film, the positive adhesive film is located between the front glass and the release film, and the negative adhesive film is located between the back plate and the release film.

[0014] As an optional technical solution for a photovoltaic module, the side edge of the positive adhesive film is flush with the side edge of the front glass, and the side edge of the back adhesive film is flush with the side edge of the back plate.

[0015] As an optional technical solution for a photovoltaic module, the side edge of the positive adhesive film and / or the side edge of the back adhesive film is flush with the side edge of the release film.

[0016] As an optional technical solution for a photovoltaic module, the backplane is a glass backplane.

[0017] The beneficial effects of the present invention include at least:

[0018] The utility model provides a photovoltaic module, which includes a backplane, a release film, a battery cell, an easy-to-pull adhesive, and a front glass. A release film is provided between the backplane and the front glass, and the release film wraps the battery cell; easy-to-pull adhesives are provided on opposite sides of the release film, and the opposite sides of the easy-to-pull adhesives are respectively adhered to the backplane and the front glass, and the easy-to-pull adhesives seal the release film. By providing the release film, and the release film completely wrapping the upper and lower surfaces and the surrounding side surfaces of the battery cell, since there is no adhesive between the release film and the battery cell, during the later recycling process of the photovoltaic module, the release film and the battery cell can be easily separated by operators, thereby making the disassembly of the photovoltaic module easier, facilitating recycling, and saving costs. At the same time, the provision of the easy-to-pull adhesive can achieve stability and reliability in the bonding between the front glass and the backplane. Since the easy-to-pull adhesives are provided on opposite sides of the release film, the provision of the easy-to-pull adhesives can also improve the sealing performance of the photovoltaic module, reduce or prevent foreign matter such as external moisture from entering the release film and contaminating the battery cell, and extend the service life. In the later stage of photovoltaic module recycling, operators can easily pull and tear off the easy-to-pull adhesive to separate the release film and battery cells. The operation process is simple and the disassembly efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0020] Figure 1 This is a schematic structural diagram of a photovoltaic module provided in Example 1 of the present utility model;

[0021] Figure 2 This is a schematic structural diagram of a photovoltaic module provided in the second embodiment of the present utility model;

[0022] Figure 3 The structure of the photovoltaic module provided by the third embodiment of the present invention is shown in FIG. Figure 1 ;

[0023] Figure 4 The structure of the photovoltaic module provided by the third embodiment of the present invention is shown in FIG. Figure 2 ;

[0024] Figure 5 The structure of the photovoltaic module provided by the fourth embodiment of the present utility model is shown as follows: Figure 1 ;

[0025] Figure 6 The structure of the photovoltaic module provided by the fourth embodiment of the present utility model is shown as follows: Figure 2 .

[0026] Reference numerals

[0027] 100, front glass; 200, release film; 210, first release layer; 220, second release layer; 230, first substrate layer; 240, second substrate layer; 300, battery cell; 400, backplane; 500, easy-to-pull adhesive; 510, first adhesive layer; 520, second adhesive layer; 530, third substrate layer; 600, positive adhesive film; 700, back adhesive film. DETAILED DESCRIPTION

[0028] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0029] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0032] In the description of this embodiment, unless otherwise specified, the term "plurality" refers to two or more quantities.

[0033] Example 1

[0034] This embodiment provides a photovoltaic module that is easy to disassemble and recycle, thus saving costs.

[0035] like Figure 1 As shown, the photovoltaic module mainly includes a backplane 400, a release film 200, a battery cell 300, an easy-to-pull adhesive 500 and a front glass 100. A release film 200 is arranged between the backplane 400 and the front glass 100, and the release film 200 wraps the battery cell 300; easy-to-pull adhesive 500 is provided on opposite sides of the release film 200, and the opposite sides of the easy-to-pull adhesive 500 are respectively adhered to the backplane 400 and the front glass 100, and the easy-to-pull adhesive 500 seals the release film 200.

[0036] Based on the above design, in this embodiment, a release film 200 is provided, and the release film 200 completely wraps the upper and lower surfaces and the surrounding side surfaces of the cell 300. Since there is no adhesive between the release film 200 and the cell 300, during the later recycling process of the photovoltaic module, the operator can easily separate the release film 200 from the cell 300, thereby making the disassembly of the photovoltaic module easier, facilitating recycling and saving costs. At the same time, the provision of the easy-to-pull adhesive 500 can achieve stability and reliability in the bonding between the front glass 100 and the back panel 400. Since the easy-to-pull adhesive 500 is provided on opposite sides of the release film 200, the provision of the easy-to-pull adhesive 500 can also improve the sealing performance of the photovoltaic module, reduce or prevent foreign matter such as external moisture from entering the release film 200 and contaminating the cell 300, and extend the service life. In the later stage of photovoltaic module recycling, operators can easily pull and tear off the easy-to-pull adhesive 500 to separate the release film 200 and the battery cell 300. The operation process is simple and the disassembly efficiency is high.

[0037] In some embodiments, the easy-to-pull adhesive 500 is arranged around the release film 200. This can improve the setting of the easy-to-pull adhesive 500 and the sealing performance of the photovoltaic module, reduce or prevent foreign matter such as external water vapor from entering the release film 200 and contaminating the battery cell 300, and extend the service life.

[0038] Optionally, the release film 200 in this embodiment includes a first release layer 210 and a second release layer 220, and the battery cell 300 is wrapped between the first release layer 210 and the second release layer 220. In other words, the release film 200 in this embodiment is double-sided release film, with both sides of the first release layer 210 not bonded to the front glass 100 and the battery cell 300, and both sides of the second release layer 220 not bonded to the backplane 400 and the battery cell 300.

[0039] In order to ensure the adhesion effect between the release film 200 and the battery cell 300 , the thickness of the first release layer 210 is 0.01 mm to 0.20 mm, and the thickness of the second release layer 220 is 0.01 mm to 0.20 mm.

[0040] Optionally, the first release layer 210 and the second release layer 220 have non-stick or low-stick properties, and their main components are usually silicone oil or other silicone-based compounds.

[0041] Optionally, the first release layer 210 and the second release layer 220 in this embodiment are each independently selected from one of polyethylene terephthalate film, biaxially oriented polypropylene film, polytetrafluoroethylene film, ethylene-tetrafluoroethylene copolymer film and fluorinated ethylene propylene copolymer film, preferably polyethylene terephthalate film.

[0042] like Figure 1 As shown, the easy-to-pull adhesive 500 in this embodiment includes a first adhesive layer 510, a second adhesive layer 520, and a third substrate layer 530. The third substrate layer 530 is disposed between the first adhesive layer 510 and the second adhesive layer 520. One side of the first adhesive layer 510 is bonded to the front glass 100, and the other side is bonded to the third substrate layer 530. One side of the second adhesive layer 520 is bonded to the back panel 400, and the other side is bonded to the third substrate layer 530. The provision of the first adhesive layer 510 and the second adhesive layer 520 enables a stable connection between the easy-to-pull adhesive 500 and the front glass 100 and the back panel 400, thereby improving the stability and reliability of the photovoltaic module. The provision of the third substrate layer 530 facilitates the disassembly of the photovoltaic module and improves the efficiency of disassembly.

[0043] like Figure 1 As shown, in this embodiment, the side of the first adhesive layer 510 away from the release film 200 and the side of the second adhesive layer 520 away from the release film 200 are both flush with the side of the front glass 100. This can ensure the adhesion between the easy-to-pull adhesive 500 and the front glass 100 and the back panel 400 as much as possible, thereby improving the stability of the photovoltaic module.

[0044] like Figure 1 As shown, the third substrate layer 530 of the easy-to-pull adhesive 500 in this embodiment protrudes from the first adhesive layer 510 and the second adhesive layer 520 on the side away from the release film 200, and the first adhesive layer 510 and the second adhesive layer 520 are flush. This facilitates the disassembly of the photovoltaic modules during later recycling, improving disassembly efficiency. Optionally, the length of the third substrate layer 530 protruding from the first adhesive layer 510 and the second adhesive layer 520 on the side away from the release film 200 can be set to between 20μm and 100μm.

[0045] Optionally, the thickness of the first adhesive layer 510 and the second adhesive layer 520 in this embodiment can be set to between 20 um and 200 um.

[0046] Optionally, the thickness of the third substrate layer 530 in this embodiment can be set to be between 50 um and 500 um.

[0047] In some optional embodiments, the backplane 400 is a glass backplane. Specifically, when the backplane 400 in the photovoltaic module is a glass backplane, the cell 300 is configured as a bifacial cell, thereby allowing both sides of the photovoltaic module to receive light, thereby improving the photovoltaic module's photoelectric conversion efficiency. When the photovoltaic module has an opaque backplane 400, the cell 300 is a single-sided cell, and the back of the photovoltaic module does not receive light, that is, the back of the photovoltaic module is opaque.

[0048] Example 2

[0049] like Figure 2 As shown, this embodiment provides a photovoltaic module, the main difference between this photovoltaic module and the first embodiment is that: a first substrate layer 230 is provided on the side of the first release layer 210 facing away from the battery cell 300, and the first substrate layer 230 is bonded to the front glass 100; a second substrate layer 240 is provided on the side of the second release layer 220 facing away from the battery cell 300, and the second substrate layer 240 is bonded to the back panel 400.

[0050] Furthermore, the first substrate layer 230 and the second substrate layer 240 are each independently selected from one of polyethylene (PE) plastic film, polyester (PET) plastic film, polypropylene (PP) plastic film, and polyurethane (PU) plastic film.

[0051] Optionally, in this embodiment, the first substrate layer 230 and the second substrate layer 240 have the same size, thereby improving processing efficiency and saving costs.

[0052] The remaining structures of the photovoltaic module in this embodiment are the same as those in the first embodiment and will not be described in detail here.

[0053] Example 3

[0054] like Figure 3-Figure 4As shown, this embodiment provides a photovoltaic module. The main difference between this photovoltaic module and the first embodiment is that the photovoltaic module further includes a positive adhesive film 600 and a back adhesive film 700. The positive adhesive film 600 is located between the front glass 100 and the release film 200, and the back adhesive film 700 is located between the back sheet 400 and the release film 200. The provision of the positive adhesive film 600 and the back adhesive film 700 can improve the stability and reliability of the attachment between the front glass 100 and the release film 200, and improve the stability and reliability of the attachment between the back sheet 400 and the release film 200, and reduce the risk of slippage and misalignment of the front glass 100 or the back sheet 400.

[0055] Furthermore, the sides of the positive adhesive film 600 in this embodiment are flush with the sides of the front glass 100, and the sides of the back adhesive film 700 are flush with the sides of the back panel 400. In other words, the length and width of the positive adhesive film 600 and the back adhesive film 700 in this embodiment are the same as the length and width of the front glass 100 and the back panel 400. This increases the attachment area of ​​the positive adhesive film 600 to the front glass 100 and the stretch-release adhesive 500, as well as the attachment area of ​​the back adhesive film 700 to the back panel 400 and the stretch-release adhesive 500, thereby improving the stability and reliability of the photovoltaic module.

[0056] Optionally, the positive adhesive film 600 and the back adhesive film 700 in this embodiment are each independently selected from one of an ethylene-vinyl acetate adhesive layer, an ethylene-octene copolymer adhesive layer, and a co-extruded composite adhesive layer of ethylene-vinyl acetate and ethylene-octene copolymer. Preferably, when both the positive adhesive film 600 and the back adhesive film 700 are ethylene-vinyl acetate adhesive layers, better bonding is achieved.

[0057] Optionally, in order to achieve a better adhesion effect, the thickness of the positive adhesive film 600 is 0.2 mm to 0.8 mm, and the thickness of the back adhesive film 700 is 0.2 mm to 0.8 mm.

[0058] It is understandable that Figure 3 for Figure 1 The progressive plan, Figure 4 for Figure 2 progressive scheme.

[0059] The remaining structures of the photovoltaic module in this embodiment are the same as those in the first embodiment and will not be described in detail here.

[0060] Example 4

[0061] like Figure 5-Figure 6As shown, this embodiment provides a photovoltaic module, which differs from the third embodiment primarily in that the side edges of the positive adhesive film 600 and / or the side edges of the back adhesive film 700 are flush with the side edges of the release film 200. Preferably, the side edges of the positive adhesive film 600 and the side edges of the back adhesive film 700 are all flush with the side edges of the release film 200, and the thickness of the positive adhesive film 600, the release film 200, and the back adhesive film 700 are consistent with the thickness of the easy-to-pull adhesive 500. This can reduce the thickness of the photovoltaic module, making it lightweight, and can also save consumables of the positive adhesive film 600 and the back adhesive film 700, thereby saving costs, while ensuring the reliability and stability of the photovoltaic module.

[0062] It is understandable that Figure 5 for Figure 1 The progressive plan, and Figure 5 yes Figure 3 Parallel scheme; Figure 6 for Figure 2 The progressive plan, and Figure 6 yes Figure 4 Parallel scheme.

[0063] The remaining structures of the photovoltaic module in this embodiment are the same as those in the third embodiment and will not be described in detail here.

[0064] Obviously, the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

[0065] Note that throughout this specification, references to terms such as "some embodiments" and "other embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. Throughout this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. A photovoltaic module, characterized in that The invention comprises a back plate (400), a release film (200), a battery cell (300), an easy-to-pull adhesive (500) and a front glass (100), wherein a release film (200) is provided between the back plate (400) and the front glass (100), and the release film (200) wraps the battery cell (300); easy-to-pull adhesives (500) are provided on opposite sides of the release film (200), and opposite sides of the easy-to-pull adhesives (500) are respectively adhered to the back plate (400) and the front glass (100), and the easy-to-pull adhesives (500) seal the release film (200).

2. The photovoltaic module according to claim 1, characterized in that The release film (200) comprises a first release layer (210) and a second release layer (220), and the battery cell (300) is wrapped between the first release layer (210) and the second release layer (220).

3. The photovoltaic module according to claim 2, characterized in that A first substrate layer (230) is provided on the side of the first release layer (210) facing away from the battery cell (300), and the first substrate layer (230) is adhesively connected to the front glass (100); a second substrate layer (240) is provided on the side of the second release layer (220) facing away from the battery cell (300), and the second substrate layer (240) is adhesively connected to the back panel (400).

4. The photovoltaic module according to claim 1, characterized in that The easy-to-pull adhesive (500) includes a first adhesive layer (510), a second adhesive layer (520) and a third substrate layer (530), wherein the third substrate layer (530) is arranged between the first adhesive layer (510) and the second adhesive layer (520), one side of the first adhesive layer (510) is bonded to the front glass (100), and the other side is bonded to the third substrate layer (530); one side of the second adhesive layer (520) is bonded to the back panel (400), and the other side is bonded to the third substrate layer (530).

5. The photovoltaic module according to claim 4, characterized in that: The side of the first adhesive layer (510) away from the release film (200) and the side of the second adhesive layer (520) away from the release film (200) are both flush with the side edge of the front glass (100).

6. The photovoltaic module according to claim 5, characterized in that: The side of the third substrate layer (530) away from the release film (200) protrudes from the first adhesive layer (510) and the second adhesive layer (520).

7. The photovoltaic module according to claim 1, characterized in that The photovoltaic module further comprises a positive adhesive film (600) and a back adhesive film (700), wherein the positive adhesive film (600) is located between the front glass (100) and the release film (200), and the back adhesive film (700) is located between the back plate (400) and the release film (200).

8. The photovoltaic module according to claim 7, characterized in that: The side edge of the positive adhesive film (600) is flush with the side edge of the front glass (100), and the side edge of the back adhesive film (700) is flush with the side edge of the back plate (400).

9. The photovoltaic module according to claim 7, characterized in that: The side edge of the positive adhesive film (600) and / or the side edge of the back adhesive film (700) is flush with the side edge of the release film (200).

10. The photovoltaic module according to any one of claims 1 to 9, characterized in that: The back plate (400) is a glass back plate.

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