Photovoltaic cell module with multilayer film structure

Abstract

The utility model provides a photovoltaic cell assembly with a multilayer film structure. The module comprises a battery string group, a front ultrathin adhesive film, a back ultrathin adhesive film, an ultrathin grid film, front glass and back glass. At least one ultrathin grid film is arranged; the battery string group comprises a plurality of battery pieces, a front carrier film and a back carrier film; the front carrier film and the back carrier film respectively cover the front / back surfaces of the plurality of battery pieces which are arranged in a plane; the front face of the battery string group faces the front glass, a front area is formed between the front face of the battery string group and the front glass, a front ultra-thin adhesive film is laid in the front area, the back face of the battery string group faces the back glass, a back area is formed between the back face of the battery string group and the back glass, and a back ultra-thin adhesive film is laid in the back area. An ultrathin grid film is laid on at least one of the front face area and the back face area, and the ultrathin grid film is bonded with the front face ultrathin adhesive film and / or the back face ultrathin adhesive film. According to the assembly, the weight of the adhesive film is reduced, and the reliability in the manufacturing process is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic cell field, especially in a kind of multilayer film structure's photovoltaic cell assembly. BACKGROUND

[0002] Ordinary ZBB film coating technology is covered 80-150g / m2 adhesive film on the front / back surface of battery piece, the thickness is between 0.1-0.2mm, to realize the current conduction function of photovoltaic module by adhesive film heating melting fixed solder strip;Between the front / back glass and battery piece, cover 300-360g / m2 adhesive film, the thickness is between 0.3-0.5mm, to realize the sealing protection module function by adhesive film heating melting adhesion battery piece and front / back glass. The manufacturing process of ordinary ZBB battery module (such as shown in the figure) includes the following steps: first, cover carrier film on the front / back surface of battery piece to make battery string group;Then cover whole adhesive film between front glass / back glass or back plate and battery piece;Again, front glass, front whole adhesive film, battery string group with carrier film on front / back surface, back whole adhesive film and back glass or back plate are laminated to make battery module. Figure 1

[0003] Under the background of reducing cost and increasing efficiency, it is committed to ZBB photovoltaic adhesive film weight reduction, and the existing technical ideas are mainly whole laying whole weight reduction or prepared into grid-shaped laying;The existing technical defects include: 1. whole laying whole thinning or prepared into grid-shaped laying, many problems will easily occur on the process, such as insufficient local support due to the adhesive film is too thin, the protection performance of battery is reduced, etc.;2. carrier film is used alone to encapsulate and laminate battery string, the two sides of carrier film need to be specially treated to ensure the low flowability with battery piece side, and at the same time, good adhesive force is formed with glass surface, multilayer structure is not conducive to thinning, and it is difficult to ensure the uniformity of carrier film on glass side, which is easy to cause local delamination of carrier film and glass and other reliability problems. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of multilayer film structure's photovoltaic cell assembly. The photovoltaic cell assembly realizes adhesive film weight reduction, and improves the reliability on process.

[0005] To achieve the purpose of the utility model, the utility model adopts the following technical solutions:

[0006] According to one aspect of the utility model, a kind of multilayer film structure's photovoltaic cell assembly is provided. The multilayer film structure's photovoltaic cell assembly includes battery string group, front ultra-thin adhesive film, back ultra-thin adhesive film, ultra-thin grid film, front glass, back glass. The ultra-thin grid film is at least one;

[0007] ​The battery string group comprises a plurality of battery pieces, a front carrier film and a back carrier film, the front carrier film and the back carrier film are respectively covered on the front surface and the back surface of the plurality of battery pieces arranged in a plane and are made into the battery string group.

[0008] The front surface of the battery string group faces the front glass, and a front surface area is formed between the front surface of the battery string group and the front glass, the front surface area is paved with the front ultra-thin adhesive film, the back surface of the battery string group faces the back glass, and a back surface area is formed between the back surface of the battery string group and the back glass, the back surface area is paved with the back ultra-thin adhesive film, at least one of the front surface area and the back surface area is paved with the ultra-thin grid film, and the ultra-thin grid film is bonded with the front ultra-thin adhesive film and / or the back ultra-thin adhesive film.

[0009] According to an embodiment of the present application, the thickness of the front ultra-thin adhesive film and the back ultra-thin adhesive film is 0.1mm-0.3mm.

[0010] According to an embodiment of the present application, the material of the front ultra-thin adhesive film and the back ultra-thin adhesive film is EVA or POE or EPE or EP structure for photovoltaic.

[0011] According to an embodiment of the present application, the thickness and material of the ultra-thin grid film are consistent with the thickness and material of the front ultra-thin adhesive film and the back ultra-thin adhesive film.

[0012] According to an embodiment of the present application, the width of the ultra-thin grid film is 1mm-210mm.

[0013] According to an embodiment of the present application, the ultra-thin grid film is in the shape of "eye" or "field".

[0014] According to an embodiment of the present application, the material of the ultra-thin grid film is ethylene-vinyl acetate polymer or polyolefin organic matter.

[0015] According to an embodiment of the present application, the ultra-thin grid film is adhered to the front surface and / or the back surface of the battery string group.

[0016] According to an embodiment of the present application, the ultra-thin grid film is adhered to the front glass and / or the back glass.

[0017] An embodiment of the present application has the following advantages or beneficial effects:

[0018] The photovoltaic cell assembly with the multilayer film structure of the utility model comprises a cell string group, a front ultra-thin adhesive film, a back ultra-thin adhesive film, an ultra-thin grid film, front glass and back glass. The photovoltaic cell assembly realizes adhesive film weight reduction (the existing ZBB film coating process uses 300-360g / m2 adhesive film with a thickness of 0.3-0.5mm; the case adopts an ultra-thin adhesive film, and the adhesive film on both sides has a grammage of 50g-300g and a thickness of 0.1mm-0.3mm.), and improves the reliability in the process. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and other features and advantages of the utility model will become more apparent by describing in detail some example implementations with reference to the accompanying drawings.

[0020] Figure 1 is a structural schematic diagram of the photovoltaic cell assembly with the first multilayer film structure in the utility model.

[0021] Figure 2 is a structural schematic diagram of the photovoltaic cell assembly with the first multilayer film structure in the utility model.

[0022] Figure 3 is a structural schematic diagram of the photovoltaic cell assembly with the second multilayer film structure in the utility model.

[0023] Figure 4 is a structural schematic diagram of the photovoltaic cell assembly with the third multilayer film structure in the utility model.

[0024] Figure 5 is a structural schematic diagram of the photovoltaic cell assembly with the fourth multilayer film structure in the utility model.

[0025] Figure 6 is a structural schematic diagram of the photovoltaic cell assembly with the fifth multilayer film structure in the utility model.

[0026] Figure 7 is a structural schematic diagram of the photovoltaic cell assembly with the sixth multilayer film structure in the utility model.

[0027] Figure 8 is a structural schematic diagram of the photovoltaic cell assembly with the seventh multilayer film structure in the utility model.

[0028] Figure 9 is a structural schematic diagram of the photovoltaic cell assembly with the eighth multilayer film structure in the utility model.

[0029] Figure 10 is a structural schematic diagram of the ultra-thin grid film in the utility model.

[0030] Figure 11 is another structural schematic diagram of the ultra-thin grid film in the utility model.

[0031] Reference signs:

[0032] 1. battery string; 11. battery piece; 12. front carrier film; 13. back carrier film; 2. front ultra-thin adhesive film; 3. back ultra-thin adhesive film; 4. ultra-thin grid film; 41. front ultra-thin grid film; 42. back ultra-thin grid film; 5. front glass; 6. back glass. DETAILED DESCRIPTION

[0033] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings; however, the example embodiments can be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the several views and the detailed description.

[0034] The terms "one", "a", "the", "said", "s" are used to denote one or more element / s, component / s, etc.; the terms "include" and "has" are used to mean that there is an inclusion of one or more elements / s, component / s, etc. without excluding other elements / s, component / s, etc.

[0035] The photovoltaic module of the multi-layer film structure of the embodiment of the present application comprises a battery string 1, a front ultra-thin adhesive film 2, a back ultra-thin adhesive film 3, an ultra-thin grid film 4, a front glass 5, and a back glass 6, and the ultra-thin grid film 4 is at least one; wherein the battery string 1 comprises a plurality of battery pieces 11, a front carrier film 12, and a back carrier film 13, the front carrier film 12 and the back carrier film 13 are respectively covered on the front surface and the back surface of the plurality of battery pieces 11 arranged in a plane and made into the battery string 1; further, the battery string 1 is made by welding the battery string covered with the carrier film and the busbar.

[0036] The front of the battery string 1 faces the front glass 5, and a front area is formed between the front of the battery string 1 and the front glass 5, the front ultra-thin adhesive film 2 is laid in the front area, the back of the battery string 1 faces the back glass 6, and a back area is formed between the back of the battery string 1 and the back glass 6, the back ultra-thin adhesive film 3 is laid in the back area, the ultra-thin grid film 4 is laid in at least one of the front area and the back area, and the ultra-thin grid film 4 is bonded with the front ultra-thin adhesive film 2 and / or the back ultra-thin adhesive film 3.

[0037] The front and back ultra-thin films are made of photovoltaic EVA, POE, EPE, or EP structures, and can be transparent or opaque. The film weight is 50g-300g and the film thickness is 0.1mm-0.3mm. The ultra-thin mesh film 4 is cut from the ultra-thin film. It can be made of the same material and thickness as the film used in the module, or other materials and thicknesses can be used according to the actual situation. The width of the ultra-thin mesh film 4 is between 1mm and 210mm, which can be adjusted according to the actual manufacturing process.

[0038] The first type of multilayer film structure photovoltaic cell module in this utility model (such as...) Figure 2 The manufacturing process (as shown) includes the following steps: covering the front / back surfaces of the battery cell 11 with a carrier film to form a battery string 1; fixing the front ultra-thin adhesive film 2 and the front ultra-thin mesh film 41 sequentially onto the front glass 5 (the front ultra-thin mesh film 41 is closer to the battery side); fixing the back ultra-thin adhesive film 3 and the back ultra-thin mesh film 42 sequentially onto the back glass 6 or the back plate (the back ultra-thin mesh film 42 is closer to the battery side); placing the battery string 1 with the carrier film on the front glass 5 with the adhesive film structure fixed on it, and welding the solder strips and busbars together; then placing the back glass 6 or the back plate with the adhesive film structure fixed on it onto the battery string 1 with the front / back carrier film stacked on it, and laminating it to form a battery module.

[0039] The second type of multilayer film structure photovoltaic cell module in this utility model (such as...) Figure 3 The manufacturing process (as shown) includes the following steps: covering the front / back surfaces of the battery cell 11 with a carrier film to form a battery string 1; fixing the front ultra-thin mesh film 41 and the front ultra-thin adhesive film 2 sequentially onto the front glass 5 (the front ultra-thin mesh film 41 is closer to the front glass 5); fixing the back ultra-thin mesh film 42 and the back ultra-thin adhesive film 3 sequentially onto the back glass 6 or the back plate (the back ultra-thin mesh film 42 is closer to the back glass 6 or the back plate); placing the battery string 1 with the carrier film on the front glass 5 with the adhesive film structure fixed on it, and welding the solder strips and busbars together; then placing the back glass 6 or the back plate with the adhesive film structure fixed on it onto the battery string 1 with the carrier film on the front / back, and laminating it to form a battery module.

[0040] The third type of multilayer film structure photovoltaic cell module in this utility model (such as...) Figure 4The manufacturing process (as shown) includes the following steps: covering the front / back surfaces of the battery cell 11 with a carrier film to form a battery string 1; fixing the front ultra-thin adhesive film 2 and the front ultra-thin mesh film 41 sequentially onto the front glass 5 (the front ultra-thin mesh film 41 is closer to the battery side); fixing the back ultra-thin mesh film 42 and the back ultra-thin adhesive film 3 sequentially onto the back glass 6 or the back plate (the back ultra-thin mesh film 42 is closer to the back glass 6 or the back plate side); placing the battery string 1 with the carrier film on the front glass 5 with the adhesive film structure fixed on it, and welding the solder strips and busbars together; then placing the back glass 6 or the back plate with the adhesive film structure fixed on it onto the battery string 1 with the front / back carrier film stacked on it, and laminating it to form a battery module.

[0041] The fourth type of multilayer film structure photovoltaic cell module in this utility model (such as...) Figure 5 The manufacturing process (as shown) includes the following steps: covering the front / back surfaces of the battery cell 11 with a carrier film to form a battery string 1; fixing the front ultra-thin mesh film 41 and the front ultra-thin adhesive film 2 sequentially onto the front glass 5 (the front ultra-thin mesh film 41 is closer to the front glass 5); fixing the back ultra-thin adhesive film 3 and the back ultra-thin mesh film 42 sequentially onto the back glass 6 or the back plate (the back ultra-thin mesh film 42 is closer to the battery); placing the battery string 1 with the carrier film on the front glass 5 with the adhesive film structure fixed on it, and welding the solder strips and busbars together; then placing the back glass 6 or the back plate with the adhesive film structure fixed on it onto the battery string 1 with the front / back carrier film stacked on it, and laminating it to form a battery module.

[0042] The fifth type of multilayer film structure photovoltaic cell module in this utility model (such as...) Figure 6 The manufacturing process (as shown) includes the following steps: covering the front / back surfaces of the battery cell 11 with a carrier film to form a battery string 1; fixing the front ultra-thin adhesive film 2 onto the front glass 5 (without an ultra-thin mesh film on the front); fixing the back ultra-thin adhesive film 3 and the back ultra-thin mesh film 42 onto the back glass 6 or back plate in sequence (the back ultra-thin mesh film 42 is closer to the battery side); placing the battery string 1 with the carrier film on the front glass 5 with the adhesive film structure fixed on it, and welding the solder strips and busbars together; then placing the back glass 6 or back plate with the adhesive film structure fixed on it onto the battery string 1 with the front / back carrier film stacked on it, and laminating it to form a battery module.

[0043] The sixth type of multilayer film structure photovoltaic cell module in this utility model (such as...) Figure 7The manufacturing process (as shown) includes the following steps: covering the front / back surfaces of the battery cell 11 with a carrier film to form a battery string 1; fixing the front ultra-thin adhesive film 2 onto the front glass 5 (without an ultra-thin mesh film on the front); fixing the back ultra-thin mesh film 42 and the back ultra-thin adhesive film 3 onto the back glass 6 or back plate in sequence (the back ultra-thin mesh film 42 is closer to the back glass 6 or back plate); placing the battery string 1 with the carrier film on the front glass 5 with the adhesive film structure fixed on it, and welding the solder strips and busbars together; then placing the back glass 6 or back plate with the adhesive film structure fixed on it onto the battery string 1 with the front / back carrier film stacked on it, and laminating it to form a battery module.

[0044] The seventh type of multilayer film structure photovoltaic cell module in this utility model (such as...) Figure 8 The manufacturing process (as shown) includes the following steps: covering the front / back surface of the battery cell 11 with a carrier film to form a battery string 1; covering the front / back surface of the battery cell 11 with a carrier film to form a battery string 1; fixing the front ultra-thin mesh film 41 and the front ultra-thin adhesive film 2 to the front glass 5 in sequence (the front ultra-thin mesh film 41 is closer to the front glass 5), and fixing the back ultra-thin adhesive film 3 to the back glass 6 or back plate (no ultra-thin mesh film on the back); placing the battery string 1 with the carrier film on the front glass 5 with the adhesive film structure fixed on it, and welding the solder strips and busbars together; then placing the back glass 6 or back plate with the adhesive film structure fixed on the battery string 1 with the carrier film on the front / back, and laminating it to form a battery module.

[0045] The eighth type of multilayer film structure photovoltaic cell module in this utility model (such as...) Figure 9 The manufacturing process (as shown) includes the following steps: covering the front / back surface of the battery cell 11 with a carrier film to form a battery string 1; covering the front / back surface of the battery cell 11 with a carrier film to form a battery string 1; fixing the front ultra-thin adhesive film 2 and the front ultra-thin mesh film 41 sequentially onto the front glass 5 (the front ultra-thin mesh film 41 is closer to the battery side), and fixing the back ultra-thin adhesive film 3 onto the back glass 6 or back plate (no ultra-thin mesh film on the back); placing the battery string 1 with the carrier film on the front glass 5 with the adhesive film structure fixed on it, and welding the solder strips and busbars together; then placing the back glass 6 or back plate with the adhesive film structure fixed on the battery string 1 with the front / back carrier film stacked on it, and laminating it to form a battery module.

[0046] like Figure 10 and Figure 11As shown, the shape of the ultra-thin grid film 4 can be "eye" or "field", which is used to fill the gap between the module pieces and the string, eliminate the risk points in the process, and can be adjusted according to the actual process. The ultra-thin grid film 4 is laid in the section between the front and back glass 6 and the battery string group 1 in the area without battery, and at least one area between the front / back cover plate and the battery string group 1 contains the ultra-thin grid film 4. The adhesive film is used to fill the potential insufficient area, and the material of the ultra-thin grid film 4 can be preferably ethylene vinyl acetate polymer or polyolefin organic matter.

[0047] The ultra-thin grid film 4 of the multi-layer film structure photovoltaic cell module of the utility model can be selected simultaneously or according to actual needs, so that 5-layer film structure and 6-layer film structure are generated; the position of the front / back grid film and the ultra-thin adhesive film can be the side of the ultra-thin adhesive film close to the glass / cover plate or the side of the grid film close to the glass / cover plate, and the specific adjustment is also based on the actual process. The additional grid film can coincide with the original fixed adhesive film step, so that new film coating equipment does not need to be additionally increased.

[0048] The multi-layer film structure photovoltaic cell module of the utility model comprises a battery string group 1, a front ultra-thin adhesive film 2, a back ultra-thin adhesive film 3, an ultra-thin grid film 4, a front glass 5 and a back glass 6. The photovoltaic cell module realizes adhesive film weight reduction (the existing ZBB film coating process uses 300-360g / m2 adhesive film with a thickness of 0.3-0.5mm; the case adopts ultra-thin adhesive film, and the gram weight of the adhesive film on both sides is 50g-300g, and the thickness of the adhesive film on both sides is 0.1mm-0.3mm.), and improves the reliability in the process.

[0049] In the embodiments of the utility model, the term "a plurality of" refers to two or more than two, unless otherwise explicitly limited. The terms "mounting", "connection", "fixing" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integrally connected. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0050] In the description of the embodiments of the utility model, it should be understood that the position or location relationship indicated by the terms "upper", "lower" and the like is based on the position or location relationship shown in the drawings, and is only for the convenience of describing the embodiments of the utility model and simplifying the description, and therefore cannot be understood as a limitation on the embodiments of the utility model. The device or unit indicated or implied must have a specific direction, a specific orientation and operation, therefore, it cannot be understood as a limitation on the embodiments of the utility model.

[0051] In the description of the present specification, the description of the terms "one embodiment", "one preferred embodiment" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The above is only the preferred embodiment of the present application, and is not intended to limit the embodiments of the present application. For those skilled in the art, the embodiments of the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims

1. A photovoltaic cell module of a multilayer film structure, characterized by, The application relates to a solar cell module, which comprises a battery string (1), a front ultra-thin adhesive film (2), a back ultra-thin adhesive film (3), an ultra-thin grid film (4), a front glass (5) and a back glass (6), wherein the ultra-thin grid film (4) is at least one. The battery string (1) comprises a plurality of battery pieces (11), a front carrier film (12) and a back carrier film (13), the front carrier film (12) and the back carrier film (13) are respectively arranged on the front surface and the back surface of the plurality of battery pieces (11) arranged in a plane and are made into the battery string (1). The front surface of the battery string (1) faces the front glass (5), and a front surface area is formed between the front surface of the battery string (1) and the front glass (5), the front surface area is paved with the front ultra-thin adhesive film (2); the back surface of the battery string (1) faces the back glass (6), and a back surface area is formed between the back surface of the battery string (1) and the back glass (6), the back surface area is paved with the back ultra-thin adhesive film (3), at least one of the front surface area and the back surface area is paved with the ultra-thin grid film (4), and the ultra-thin grid film (4) is bonded to the front ultra-thin adhesive film (2) and / or the back ultra-thin adhesive film (3). The thickness of the front ultra-thin adhesive film (2) and the back ultra-thin adhesive film (3) is 0.1mm-0.3mm.

2. A photovoltaic cell module of a multi-layer film structure according to claim 1, characterized in that, The material of the front ultra-thin adhesive film (2) and the back ultra-thin adhesive film (3) is EVA or POE or EPE or EP structure for photovoltaic.

3. A photovoltaic cell module of a multi-layer film structure according to claim 1, wherein, The thickness and material of the ultra-thin grid film (4) are consistent with those of the front ultra-thin adhesive film (2) and the back ultra-thin adhesive film (3).

4. A photovoltaic cell module of a multi-layer film structure according to claim 1, wherein, The width of the ultra-thin grid film (4) is 1mm-210mm.

5. A photovoltaic cell module of a multi-layer film structure according to claim 1, wherein The ultra-thin grid film (4) is in the shape of "eye" or "field".

6. A photovoltaic cell module of a multi-layer film structure according to claim 1, wherein, The material of the ultra-thin grid film (4) is ethylene-vinyl acetate polymer or polyolefin organic matter.

7. A photovoltaic cell module of a multi-layer film structure according to claim 1, wherein The ultra-thin grid film (4) is adhered to the front surface and / or the back surface of the battery string (1).

8. A photovoltaic cell module of a multi-layer film structure according to claim 1, wherein The ultra-thin grid film (4) is adhered to the front glass (5) and / or the back glass (6).

9. A photovoltaic cell module of a multi-layer film structure according to claim 1, wherein, ​

Images