A photovoltaic single-glass module and photovoltaic system

Abstract

The utility model relates to a kind of photovoltaic single glass assembly and photovoltaic system, single glass assembly includes the battery piece layer, second adhesive film layer and backboard layer setting in sequence, the first gap between adjacent battery piece in battery piece layer and the second gap between the edge of battery piece layer and the edge of backboard layer are communicated to form grid-shaped third gap, aluminium foil layer is set in the below of backboard layer or the inside of backboard layer, and the orthographic projection area of third gap is all covered by aluminium foil layer.This scheme is used, corresponding aluminium foil layer is set below the position of third gap, and the effect of saving material, cost control is realized by the net structure of aluminium foil layer, simultaneously, since aluminium foil layer covers the orthographic projection area of third gap, water vapor below photovoltaic single glass assembly is not easy to enter the above of battery piece along the orthographic projection area below third gap, thereby effectively reducing the influence of water vapor on the front of photovoltaic cell, and then effectively improve the stability of photovoltaic assembly.

Description

Technical Field

[0001] This utility model relates to the technical field of photovoltaic modules, and in particular to a single-glass photovoltaic module and photovoltaic system. Background Technology

[0002] As the core component of a solar photovoltaic system, the structural design of photovoltaic modules directly affects power generation efficiency, reliability, and cost. Currently, the mainstream modules are divided into single-glass modules and double-glass modules.

[0003] In the use of single-glass photovoltaic modules, to prevent moisture from entering the module through the backsheet layer and further diffusing to the upper surface of the cells, causing EVA hydrolysis and thus accelerating the PID-c effect and Ag / Al grid line corrosion, specific encapsulation schemes are used to block moisture below the back of the cells, reducing the impact of moisture on the single-glass module. Aluminum foil backsheets, due to their ultra-low moisture transmittance, have become one of the feasible encapsulation solutions for single-glass modules. Currently, conventional aluminum foil backsheets are laid in a full-coverage manner at the bottom of the cells. However, due to the high cost of aluminum foil layers, large sheets of aluminum foil are limited in their large-scale use in photovoltaic single-glass modules.

[0004] Therefore, there is a need for a photovoltaic single-glass module that can balance cost, waterproofing, and prevent EVA hydrolysis. Utility Model Content

[0005] Based on this, a photovoltaic single-glass module and photovoltaic system are provided to improve the problem in the prior art where water vapor can easily enter the top of the cell, thus causing grid line corrosion.

[0006] On the one hand, this utility model provides a photovoltaic single-glass module, the single-glass module comprising:

[0007] A battery cell layer, comprising a plurality of battery cells laid at intervals along the same plane, with a first gap between adjacent battery cells;

[0008] The second adhesive film layer is used to adhere to and cover the bottom surface of the battery cell layer;

[0009] A backsheet layer is located below the second adhesive film layer; there is a second gap between the edge of the backsheet layer and the edge of the cell layer, and the second gap and the first gap are connected to form a grid-like third gap;

[0010] The aluminum foil layer is in the form of a grid. The top surface of the aluminum foil layer is covered by the back sheet layer. The projected area of ​​the third gap is covered by the aluminum foil layer. The aluminum foil layer is used to prevent water vapor under the single glass module from entering the cell layer above the cell layer through the third gap.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] In one implementation, the second adhesive layer is partially configured as a high water-resistant adhesive film, and the high water-resistant adhesive film is located directly below the third gap.

[0013] In one implementation, the high water-resistant adhesive film forms a grid-like structure corresponding to the third gap, and the projected area of ​​the third gap is covered by the high water-resistant adhesive film.

[0014] Alternatively, the high water-resistant adhesive film is formed by multiple U-shaped water-blocking parts arranged at intervals. The orthographic projection area of ​​the annular cavity formed by the inner wall of each water-blocking part falls within the coverage area of ​​the battery cell, and the orthographic projection area of ​​the outline of the U-shaped inner wall of the water-blocking part falls within the coverage area of ​​the aluminum foil layer.

[0015] In one implementation, the width of the aluminum foil layer used to cover the first gap is greater than the width of the first gap;

[0016] The projected area of ​​the high water-resistant adhesive film falls within the coverage area of ​​the aluminum foil layer.

[0017] In one implementation, the aluminum foil layer is located inside the backing layer.

[0018] In one implementation, multiple battery cells are evenly arranged and the battery cell layer is rectangular, while the aluminum foil layer is a rectangular grid structure corresponding to the battery cell layer.

[0019] In one implementation, a passivation layer is provided on the surface of the aluminum foil layer to suppress oxidation and ion deposition.

[0020] In one implementation, an ion barrier layer is provided between the backsheet layer and the second adhesive film layer to prevent metal ions deposited from the aluminum foil layer from penetrating into the battery cell layer.

[0021] In one implementation, the single-glass module also includes:

[0022] The first adhesive film layer is used to adhere to and cover the top surface of the battery cell layer;

[0023] The front glass is bonded to the top surface of the first adhesive film layer.

[0024] The frame surrounds the monoglass module.

[0025] On the other hand, this utility model also provides a photovoltaic system, including a photovoltaic single-glass module.

[0026] The beneficial effects of this utility model are as follows: A photovoltaic module includes multiple solar cells. When the solar cells are arranged at intervals, a grid-like third gap is formed between the solar cells and between the solar cells and the edges along the thickness direction perpendicular to the solar cell. Therefore, water vapor in the lower layer of the photovoltaic single-glass module can easily enter the upper part of the solar cell along the position of the third gap. The structure provided in this application sets a corresponding aluminum foil layer below the position of the third gap. The mesh structure of the aluminum foil layer achieves the effect of saving materials and controlling costs. At the same time, since the aluminum foil layer covers the positive projection area of ​​the third gap, water vapor under the photovoltaic single-glass module is not easy to enter the upper part of the solar cell along the direct lower part of the third gap. This effectively reduces the occurrence of EVA hydrolysis on the upper part of the photovoltaic module, effectively reduces the impact of water vapor on the front of the photovoltaic cell, and effectively improves the stability of the photovoltaic module. Since the technical problem solved by this solution is to avoid the hydrolysis of EVA on the upper part of the solar cell under the action of water vapor, a second adhesive film layer is set below the solar cell layer, and the second adhesive film layer is used to adhere to and cover the solar cell layer. Attached Figure Description

[0027] Figure 1 An exploded view of a photovoltaic single-glass module in one embodiment;

[0028] Figure 2 This is a schematic diagram of a partial cross-section of a photovoltaic single-glass module in Example 1;

[0029] Figure 3 This is a schematic diagram of a partial cross-section of a photovoltaic single-glass module in Example 2;

[0030] Figure 4 This is a schematic diagram of a partial cross-section of a photovoltaic single-glass module in Example 3.

[0031] In the attached diagram, the components represented by each number are as follows:

[0032] 1. Battery cell layer; 2. First gap; 3. First adhesive film layer; 4. Backsheet layer; 5. Aluminum foil layer; 6. High water-resistant adhesive film; 7. Second adhesive film layer; 8. Front glass; 9. Frame. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit the scope of this application. It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show components related to this utility model and are not drawn according to the actual number, shape, and size of the components in implementation. In actual implementation, the shape, quantity, and proportion of each component can be arbitrarily changed, and the component layout may also be more complex.

[0034] To prevent moisture from entering the module through the backsheet layer 4 and further diffusing to the upper surface of the cells, thus causing EVA hydrolysis, a photovoltaic single-glass module that balances cost and moisture blocking is needed. To this end, this application provides the following solution.

[0035] On the one hand, this application provides:

[0036] A single-glass photovoltaic module, see Figure 1 and Figure 2 The single-glass module includes a cell layer 1, a second encapsulating film layer 7, a backsheet layer 4, and an aluminum foil layer 5. The cell layer 1 includes multiple cells spaced apart along the same plane. The second encapsulating film layer 7 is used to adhere to and cover the bottom surface of the cell layer 1. The backsheet layer 4 is located below the second encapsulating film layer 7. There is a second gap between the edge of the backsheet layer 4 and the edge of the cell layer 1. The second gap and the first gap are connected to form a grid-like third gap. The aluminum foil layer 5 is grid-like. The top surface of the aluminum foil layer 5 is covered by the backsheet layer 4. The projected area of ​​the third gap is covered by the aluminum foil layer 5. The aluminum foil layer 5 is used to prevent water vapor below the single-glass module from entering the top of the cell layer 1 through the third gap.

[0037] In this solution, the photovoltaic module includes multiple solar cells. When the solar cells are arranged at intervals, a grid-like third gap is formed between the solar cells and between the solar cells and their edges along the thickness direction perpendicular to the solar cell. Therefore, water vapor in the lower layer of the photovoltaic single-glass module can easily enter the upper part of the solar cells through the third gap. The structure provided in this application sets a corresponding aluminum foil layer 5 below the third gap. The mesh structure of the aluminum foil layer 5 achieves the effect of saving materials and controlling costs. At the same time, since the aluminum foil layer 5 covers the projected area of ​​the third gap, water vapor under the photovoltaic single-glass module is less likely to enter the upper part of the solar cells through the lower part of the second gap. This effectively reduces the occurrence of EVA hydrolysis on the upper part of the photovoltaic module and effectively reduces the impact of water vapor on the front of the photovoltaic cells, thereby effectively improving the stability of the photovoltaic module.

[0038] In this embodiment, since the aluminum foil layer 5 is essentially a metal with high conductivity, if it is not separated from the battery cell, it may cause the battery cell to short circuit or leak. Therefore, it is necessary to separate the aluminum foil layer 5 from the battery cell layer 1. That is, an outer insulating backplate layer is used to cover the top surface of the aluminum foil layer 5, so that the aluminum foil layer 5 can achieve the water-blocking effect while avoiding the negative effect of the conductivity of the aluminum foil layer 5 on the battery cell layer 1.

[0039] In this embodiment, the back sheet layer 4 needs to have an insulating effect. Therefore, the back sheet layer 4 can be made entirely of insulating material, or it can be a structure with only the outer periphery being insulating.

[0040] In this embodiment, the backsheet layer 4 is a generalized backsheet layer 4. Since the aluminum foil layer 5 is normally wrapped by the backsheet layer 4, this example is given here; that is, any structure that wraps the aluminum foil layer 5 and provides insulation is included in the definition of the backsheet layer 4 in this embodiment. Specific structural examples of the backsheet layer 4 include:

[0041] 1. The surface is coated with an insulating layer, that is, the backing layer 4 is an insulating layer covering the aluminum foil layer 5. The aluminum foil layer 5 is covered by coating. After coating, corona treatment is required to enhance the adhesion strength with the EVA film. The coating material can be polyimide PI coating, nano-ceramic coating such as Al2O3, SiO2 or epoxy resin coating.

[0042] 2. Anodizing treatment: porous Al2O3 is generated on the surface of aluminum foil through electrochemical oxidation, forming a natural insulating barrier. Here, the corresponding backing layer 4 is the oxide layer of aluminum foil layer 5.

[0043] 3. Insulating film, such as EVA film or silicone film for backsheet layer 4. Backsheet layer 4 is a 0.3mm-0.5mm thick insulating film laid between aluminum foil layer 5 and battery cell, and bonding is achieved through lamination process;

[0044] 4. Insulating spacer layer, such as backsheet layer 4 which is PET nonwoven fabric or aramid paper, backsheet layer 4 must completely cover the contact area between aluminum foil layer 5 and battery cell, and the edge of backsheet layer 4 extends 5mm-10mm beyond the aluminum foil.

[0045] The above are just examples of four possible structures for the backing layer 4. The backing layer 4 can be a structure that is separate from the aluminum foil layer 5, or it can be a coating or plating structure that is inseparable from the aluminum foil layer 5. Therefore, other schemes with similar structures or principles should also fall within the scope of the definition of the backing layer 4 in this application.

[0046] In some embodiments of this application, the second adhesive film layer 7 is partially configured as a high water-resistant adhesive film 6, and the high water-resistant adhesive film 6 is located directly below the third gap. The aluminum foil layer 5 and the high water-resistant adhesive film 6 form a barrier structure to prevent water vapor from entering the third gap.

[0047] See Figure 3 and Figure 4The high water-resistant adhesive film 6 is located within the second adhesive film layer 7, extending through the thickness direction of the second adhesive film layer 7. The upper and lower sides of the high water-resistant adhesive film 6 are flush with the upper and lower sides of the second adhesive film layer 7. The aluminum foil layer 5 and the high water-resistant adhesive film 6 form a barrier structure that prevents moisture from entering the third gap. By placing the high water-resistant adhesive film 6 below the third gap of the solar cell, and along the bottom-up direction, the water-resistant structure and the third gap are sequentially covered in a vertically arranged manner. This creates a shielding effect on the third gap, reducing the path for moisture to enter the upper part of the solar cell. This effectively reduces the hydrolysis of the EVA film above the solar cell due to moisture, thereby improving the stability of the photovoltaic single-glass module.

[0048] In the embodiments, the material of the first adhesive film layer is generally EPE or POE, and in a few cases, EVA; the material of the second adhesive film layer is generally EVA, and in a few cases, EPE or POE. EVA is ethylene-vinyl acetate copolymer, POE is polyolefin elastomer, and EPE refers to an adhesive film formed by mixing EVA and POE.

[0049] In some embodiments of this application, see Figure 3 The high water-resistant adhesive film 6 in the second film layer 7 forms a grid-like structure corresponding to the third gap, meaning the projected area of ​​the third gap falls within the coverage area of ​​the high water-resistant adhesive film 6 in the second film layer 7. It can be seen that the second film layer 7 includes the high water-resistant adhesive film 6 and a main body, with the projected area of ​​the main body falling within the coverage area of ​​the solar cell. This ensures that the high water-resistant adhesive film 6 directly blocks the third gap in the vertical direction, i.e., the high water-resistant adhesive film 6 is located directly below the third gap, thus ensuring the coverage area of ​​the high water-resistant adhesive film 6 over the third gap. Furthermore, the aluminum foil blocks the area directly below the high water-resistant adhesive film 6, improving the blocking effect on the third gap between the solar cells.

[0050] In some embodiments, see Figure 4The high water-resistant adhesive film 6 is formed by multiple U-shaped water-blocking parts arranged at intervals. The orthographic projection area of ​​the annular cavity formed by the inner wall of each water-blocking part falls within the coverage area of ​​the battery cell, and the orthographic projection area of ​​the outline of the U-shaped inner wall of the water-blocking part falls within the coverage area of ​​the aluminum foil layer 5. The second adhesive film layer 7 includes the high water-resistant adhesive film 6 and the main body part, and the annular cavity is filled with the main body part of the second adhesive film layer 7. Thus, the bottom-to-top positional relationship of the aluminum foil layer 5, the high water-resistant adhesive film 6, and the third gap forms a bottom-to-top shielding effect on the third gap. The water-blocking part of the U-shaped structure essentially reduces material usage, effectively thinning the thickness of each side of the high water-resistant adhesive film. The U-shaped structure also provides a wider range of shielding for the upward flow of water vapor. When the high water-resistant adhesive film 6 is positioned through the thickness direction of the second adhesive film layer 7, the U-shaped structure ensures the water-blocking effect while reducing the amount of high water-resistant adhesive film 6 used. Since the cost of the high water-resistant adhesive film 6 is higher than that of the EVA adhesive film, when the high water-resistant adhesive film 6 is hollow, the middle part of the high water-resistant adhesive film 6 is filled with EVA adhesive film. The U-shaped hollow high water-resistant adhesive film 6 reduces costs compared to a solid high water-resistant adhesive film 6.

[0051] In the embodiments, the high water-resistant adhesive film 6 with the U-shaped structure can be a single integral structure or can be composed of multiple independent block or strip high water-resistant adhesive films 6. For example, the ends of four strip high water-resistant adhesive films 6 can be attached sequentially to form a U-shaped structure.

[0052] In some embodiments of this application, see Figure 2 The aluminum foil layer 5, used to cover the first gap 2, has a width greater than the width of the first gap 2, and the projected area of ​​the high water-resistant adhesive film 6 falls within the coverage area of ​​the aluminum foil layer 5. Thus, through the blocking effect of the aluminum foil layer 5 and the high water-resistant adhesive film 6, the entry of moisture from below into the top of the solar cell is effectively reduced. Furthermore, the high water-resistant adhesive film 6 is made of POE, or a mixture of POE and EVA. Currently, photovoltaic films on the market include EVA, EPE, and POE, with POE > EPE > EVA exhibiting the best water resistance. POE and EPE have better water resistance than EVA. EPE refers to an adhesive film formed by mixing EVA and POE.

[0053] In the examples, EVA is an ethylene-vinyl acetate copolymer, and POE is a polyolefin elastomer. For mixtures of POE and EVA, the main component of the mixture is POE, and the auxiliary component is EVA, meaning that the content of POE is greater than that of EVA, but there are no restrictions on the specific content of the components.

[0054] See Figure 3Since a high water-resistant adhesive film 6 is also provided above the aluminum foil layer 5, the width of the corresponding position of the aluminum foil layer 5 needs to be no less than the outer contour of the high water-resistant adhesive film 6 at the corresponding position. Therefore, the width of the corresponding position of the aluminum foil layer 5 needs to be larger than the width of the first gap 2, such as more than one, two, three, four, or five times. However, it should be noted that the larger the size of the corresponding position of the aluminum foil layer 5, the higher the cost. Therefore, the size of the aluminum foil layer 5 can be selected according to the actual application scenario.

[0055] In some embodiments of this application, see Figure 2 and Figure 3 The aluminum foil layer 5 is located inside the backsheet layer 4 in the thickness direction. In this way, placing the aluminum foil layer 5 inside the backsheet layer 4 ensures that both the top and bottom sides of the aluminum foil layer 5 are covered by the backsheet layer 4, effectively preventing the aluminum foil layer 5 from being exposed and ensuring that the conductivity of the aluminum foil layer 5 does not affect the use of the battery cell; in addition, the backsheet layer 4 located below the aluminum foil layer 5 also has a protective effect on the aluminum foil layer 5.

[0056] In some embodiments of this application, the aluminum foil layer 5 is bonded to the backing layer 4 by an adhesive.

[0057] In some embodiments of this application, multiple battery cells are evenly arranged, and the battery cell layer 1 is rectangular, while the aluminum foil layer 5 is a rectangular grid structure corresponding to the battery cell layer 1. In this way, both the battery cells and the aluminum foil layer 5 are arranged in a regular and uniform manner, reducing the cost of processing and assembling components.

[0058] In some embodiments of this application, a passivation layer is provided on the surface of the aluminum foil layer 5, and / or an ion barrier layer is added between the backsheet layer 4 and the second adhesive film layer 7; the passivation layer inhibits oxidation and ion deposition, and the barrier layer prevents metal ions deposited from the aluminum foil layer 5 from penetrating into the battery cell layer 1. Thus, by providing the passivation layer and / or the barrier layer, metal ions from the aluminum foil layer 5 are prevented from penetrating into the battery cell layer 1. Furthermore, the passivation layer can be aluminum oxide, silicon dioxide, silicon nitride, etc., and the barrier layer can be a fluorine film.

[0059] In this embodiment, considering both high hydrophobicity and low cost, this patent designs an aluminum foil backsheet for single-glass modules, focusing on the feasibility of the encapsulation method. Due to the different coefficients of thermal expansion and contraction between the aluminum foil and the backsheet materials, problems such as delamination and bulging inside the backsheet can occur (for example, Canadian Solar previously experienced bulging issues with aluminum foil backsheets from Dongyang Aluminum). For delamination and bulging caused by high and low temperature cycling, this is due to the aluminum foil (coefficient of thermal expansion ≈ 23 × 10⁻⁶). -6 / ℃) and polymer backing (such as PET) have a thermal expansion coefficient ≈70×10 -6The interfacial shear stress generated by the difference in expansion and contraction during temperature cycling ( / ℃) can be addressed by the following methods: 1. Material optimization: Select a backing material with a low coefficient of thermal expansion (such as modified PET or composite material containing inorganic fillers) to reduce the difference in coefficient of thermal expansion with the aluminum foil; 2. Use a transition layer design with a coefficient of thermal expansion (such as gradient materials or flexible adhesives) to alleviate interfacial stress; 3. Structural design improvement: Design a wavy or grid-like aluminum foil structure to allow local deformation to release stress.

[0060] The wavy shape of aluminum foil layer 5 is achieved by superimposing a wavy microstructure on top of a grid structure, which allows for local deformation to release stress.

[0061] In some embodiments of this application, see Figure 1 The single-glass module also includes a first encapsulating film layer 3, a front glass layer 8, and a frame 9. The first encapsulating film layer 3 is used to adhere to and cover the top surface of the solar cell layer 1; the front glass layer 8 is adhered to the top surface of the first encapsulating film layer 3; and the frame 9 surrounds the single-glass module. In this way, the front glass layer 8 has high light transmittance to ensure efficient solar energy conversion. In addition, the front glass layer 8 also provides protection against impact and acid rain. The frame 9, such as an aluminum alloy frame 9, is fixed to the glass and backsheet via corner brackets, effectively improving the bending strength of the photovoltaic single-glass module.

[0062] On the other hand, this application provides:

[0063] A photovoltaic system comprising a single-glass photovoltaic module.

[0064] For the solution in this application, three corresponding embodiments are listed:

[0065] Example 1, see Figure 2 It does not have a high water-resistant adhesive film 6. The aluminum foil layer 5 is set inside the backsheet layer 4. The second adhesive film layer 7, the cell layer 1 and the first adhesive film layer 3 are sequentially bonded together from bottom to top. The grid-like aluminum foil layer 5 covers the grid-like third gap between the cells and between the cell edge and the backsheet edge, thereby effectively reducing the moisture entering above the cells along the third gap and preventing the EVA film from hydrolyzing due to moisture, thus improving the stability of the photovoltaic single-glass module.

[0066] Other structures, such as the front glass 8 and the frame 9, are arranged in the same way in different embodiments, so they will not be described in detail.

[0067] Example 2, see Figure 3The second adhesive film layer 7 is partially configured as a high water-resistant adhesive film 6, and the aluminum foil layer 5 is disposed inside the backsheet layer 4. The second adhesive film layer 7, the cell layer 1, and the first adhesive film layer 3 are sequentially bonded together from bottom to top. The high water-resistant adhesive film 6 forms a grid structure, and the projected area of ​​the grid-shaped third gap formed between the cells and between the cell edge and the backsheet edge is covered by the high water-resistant adhesive film 6. The projected area of ​​the high water-resistant adhesive film 6 is covered by the aluminum foil layer 5, which forms a bottom-to-top shielding effect on the third gap, effectively reducing the path of water vapor entering the top of the cell, avoiding the hydrolysis of the EVA film due to water vapor, thereby improving the stability of the photovoltaic single-glass module.

[0068] Example 3, see Figure 4 The second adhesive film layer 7 is partially configured as a high water-resistant adhesive film 6, and the aluminum foil layer 5 is disposed inside the backsheet layer 4. The second adhesive film layer 7, the cell layer 1, and the first adhesive film layer 3 are sequentially bonded together from bottom to top. The high water-resistant adhesive film 6 is formed by multiple U-shaped water-blocking parts arranged at intervals. The projected area of ​​the annular cavity formed by the inner wall of each water-blocking part falls within the coverage area of ​​the cell, and the annular cavity is filled with the non-high water-resistant adhesive film portion of the second adhesive film layer 7. The projected area of ​​the outline of the U-shaped inner wall of the water-blocking part falls within the coverage area of ​​the aluminum foil layer 5, forming a bottom-to-top shielding effect on the gaps between the cells, effectively reducing the path of water vapor entering the top of the cells, and preventing the EVA film from hydrolyzing due to water vapor, thereby improving the stability of the photovoltaic single-glass module. In addition, while the U-shaped structure has a material-reducing effect, it also provides a larger-scale shielding of the bottom-to-top flow channel of water vapor.

[0069] In the description of this utility model, it should be understood that the terms "thickness," "upper," "lower," "vertical," "top," and "bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0070] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above 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 one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0071] The above embodiments merely illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A photovoltaic single-glass module, characterized in that, The single-glass module includes: A battery cell layer (1) comprising a plurality of battery cells laid at intervals along the same plane, with a first gap (2) between adjacent battery cells; The second adhesive film layer (7) is used to adhere to and cover the bottom surface of the battery cell layer (1); A backsheet layer (4) is located below the second adhesive film layer (7); there is a second gap between the edge of the backsheet layer (4) and the edge of the battery cell layer (1), and the second gap and the first gap are connected to form a mesh-like third gap; The aluminum foil layer (5) is in the form of a grid. The top surface of the aluminum foil layer (5) is covered by the back sheet layer (4). The projected area of ​​the third gap is covered by the aluminum foil layer (5). The aluminum foil layer (5) is used to block water vapor under the single glass module from entering the cell layer (1) above the cell layer (1) through the third gap.

2. The photovoltaic single-glass module according to claim 1, characterized in that, The second adhesive film layer (7) is partially configured as a high water-resistant adhesive film (6), and the high water-resistant adhesive film (6) is located directly below the third gap.

3. The photovoltaic single-glass module according to claim 2, characterized in that, The high water-resistant adhesive film (6) forms a grid structure corresponding to the third gap, and the projected area of ​​the third gap is covered by the high water-resistant adhesive film (6). Alternatively, the high water-resistant adhesive film (6) is formed by multiple U-shaped water-blocking parts arranged at intervals, and the orthographic projection area of ​​the annular cavity formed by the inner wall of each water-blocking part falls within the coverage area of ​​the battery cell, and the orthographic projection area of ​​the outline of the U-shaped inner wall of the water-blocking part falls within the coverage area of ​​the aluminum foil layer (5).

4. The photovoltaic single-glass module according to claim 2 or 3, characterized in that, The width of the aluminum foil layer (5) used to cover the first gap (2) is greater than the width of the first gap (2); The projected area of ​​the high water-resistant adhesive film (6) falls within the coverage area of ​​the aluminum foil layer (5).

5. The photovoltaic single-glass module according to claim 1, characterized in that, The aluminum foil layer (5) is located inside the backing layer (4).

6. The photovoltaic single-glass module according to claim 1, characterized in that, The multiple battery cells are evenly arranged and the battery cell layer (1) is rectangular, and the aluminum foil layer (5) is a rectangular grid structure corresponding to the battery cell layer (1).

7. The photovoltaic single-glass module according to claim 1, characterized in that, The surface of the aluminum foil layer (5) is provided with a passivation layer to suppress oxidation and ion deposition of the aluminum foil layer (5).

8. The photovoltaic single-glass module according to claim 1 or 7, characterized in that, An ion barrier layer is also provided between the backsheet layer (4) and the second adhesive film layer (7) to prevent metal ions released from the aluminum foil layer (5) from penetrating into the battery cell layer (1).

9. The photovoltaic single-glass module according to claim 1, characterized in that, The single-glass module also includes: The first adhesive film layer (3) is used to adhere to and cover the top surface of the battery cell layer (1); Front glass (8), which is attached to the top surface of the first adhesive film layer (3); A frame (9) surrounds the monoglass assembly.

10. A photovoltaic system, characterized in that, Including the photovoltaic single-glass module as described in any one of claims 1 to 9.

Images