Photovoltaic double-glass assembly

Abstract

The invention relates to the technical field of photovoltaic modules, and particularly provides a photovoltaic double-glass module, which comprises an adhesive film layer, a battery string, a glass layer and a first adhesive film block, the number of the adhesive film layers is two, and the two adhesive film layers are arranged oppositely; a plurality of battery strings are arranged, and the plurality of battery strings are arranged between the two adhesive film layers in an array coating manner; the number of the glass layers is two, the two glass layers are in one-to-one correspondence with the two adhesive film layers, and the glass layers are arranged on the sides, away from the battery strings, of the adhesive film layers in a wrapping mode; the first adhesive film blocks are arranged between the corresponding glass layers and the adhesive film layers, and the first adhesive film blocks are located above the adjacent battery strings. During lamination, the first adhesive film block is stressed preferentially to press the plurality of battery strings, so that deviation of the battery strings is avoided. And the first adhesive film block can be fused into the adhesive film layer, so that the missing adhesive film is supplemented, and bubbles are prevented from being generated. The original mode of arranging an anti-overpressure frame is replaced, the production cost is reduced, the production efficiency is improved, and the production quality is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic modules, and in particular relates to a photovoltaic double-glass module. Background Art

[0002] Photovoltaic double-glass modules are generally composed of double-layer glass, crystalline silicon cell strings and double-layer adhesive film. The production process of photovoltaic double-glass modules usually includes string welding, lamination, frame assembly, testing and other processes, especially the lamination process. The lamination process is a very important process that directly affects the reliability of the finished product of photovoltaic double-glass modules.

[0003] Existing photovoltaic double-glass modules usually have anti-overpressure frames installed around them before the lamination process begins. Because the anti-overpressure frames are made of hard and high-temperature resistant materials, they can reduce the force on the edges of photovoltaic double-glass modules during the lamination process, thereby avoiding the risk of cell string displacement and the generation of bubbles in photovoltaic double-glass modules. However, the installation, placement or removal of anti-overpressure frames requires special personnel to operate, which not only increases the production cost of photovoltaic double-glass modules, but also greatly affects the production efficiency of photovoltaic double-glass modules, especially in large-scale production, where the impact is more obvious. However, if the use of anti-overpressure frames is abandoned, it is very easy for the film layer to drive the cell string to move during the lamination process, resulting in cell string displacement or bubble generation, which greatly increases the production defect rate of photovoltaic double-glass modules and greatly affects the production quality.

[0004] Therefore, it is difficult for the existing lamination process of photovoltaic double-glass modules to ensure production quality when the use of the anti-overpressure frame is abandoned. Summary of the invention

[0005] In view of the above problems, the present invention proposes a photovoltaic double-glass component, comprising:

[0006] Adhesive film layer, the adhesive film layer comprises two layers, and the two layers of the adhesive film layer are arranged opposite to each other;

[0007] A battery string, wherein there are a plurality of battery strings, and an array of the plurality of battery strings is coated and disposed between two layers of the adhesive film layers;

[0008] A glass layer, wherein the glass layer has two layers, the two glass layers correspond to the two adhesive film layers one by one, and the glass layer is coated on a side of the adhesive film layer away from the battery string;

[0009] The first adhesive film block is disposed between the corresponding glass layer and the adhesive film layer, and the first adhesive film block is located above a plurality of adjacently disposed battery strings.

[0010] In some specific embodiments, there are a plurality of first adhesive film blocks, and each of the first adhesive film blocks is disposed above two adjacent battery cells of two adjacent battery strings.

[0011] In some specific embodiments, a plurality of the first adhesive film blocks are evenly arranged along the length direction of the battery string.

[0012] In some specific embodiments, the plurality of first adhesive film blocks are respectively disposed above the battery strings on both sides in the width direction of the battery string and between the battery strings adjacent to the battery strings on both sides in the width direction of the battery string.

[0013] In some specific embodiments, 3 to 4 battery cells are spaced between every two adjacent first adhesive film blocks in the length direction of the battery string.

[0014] In some specific embodiments, two sides of the first adhesive film block extend along the width direction of the battery string to above two adjacent battery cells.

[0015] In some specific embodiments, the thickness dimension H of the first adhesive film block in the thickness direction of the battery string is in the range of: H ≥ 0.5 mm.

[0016] In some specific embodiments, it also includes:

[0017] A second adhesive film block, wherein the second adhesive film block is disposed between the corresponding glass layer and the side of the adhesive film layer.

[0018] In some specific embodiments, there are a plurality of the second adhesive film blocks, and the plurality of the second adhesive film blocks are respectively disposed between the corresponding glass layer and four corners of the adhesive film layer.

[0019] In some specific embodiments, the material of the first film block, the second film block and the film layer is one of POE, EPE, EVA or PVB, and the material of the first film block, the second film block and the film layer is the same.

[0020] The photovoltaic double-glass assembly of the present invention can make the position of the first film block bear force first during the lamination process, and press the multiple battery strings arranged adjacently below the first film block through the first film block that bear force first, thereby fixing the setting position of the multiple battery strings and avoiding the deviation of the battery strings. At the same time, as the lamination process proceeds, the first film block can gradually blend into the film layer, thereby supplementing the film that is missing in some positions due to the flow of the film layer, and avoiding the generation of bubbles. The setting of the first film block replaces the original method of setting an anti-overpressure frame, thereby reducing production costs and improving production efficiency. It is possible to ensure production quality while abandoning the use of the anti-overpressure frame.

[0021] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of a photovoltaic double-glass assembly in an embodiment of the present invention is shown;

[0024] Figure 2 A schematic diagram showing the relative positional relationship between a battery string, a first adhesive film block and a second adhesive film block in an embodiment of the present invention is shown.

[0025] In the figure, 1, battery string; 11, battery cell; 2, film layer; 3, glass layer; 4, first film block; 5, second film block. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Reference Figure 1The present invention provides a photovoltaic double-glass module, comprising: a film layer 2, a battery string 1, a glass layer 3 and a first film block 4. The film layer 2 is two layers, and the two film layers 2 are arranged opposite to each other. There are multiple battery strings 1, and the multiple battery strings 1 are arrayed and wrapped between the two film layers 2. There are two layers of glass layer 3, and the two glass layers 3 correspond to the two film layers 2 one by one. The glass layer 3 is wrapped on the side of the film layer 2 away from the battery string 1. The first film block 4 is arranged between the corresponding glass layer 3 and the film layer 2, and the first film block 4 is located above the multiple battery strings 1 arranged adjacently.

[0028] Specifically, multiple battery strings 1 are arranged in an array on the upper surface of one of the adhesive film layers 2, and another adhesive film layer 2 covers the upper surface of the multiple battery strings 1 arranged in an array, so that the multiple battery strings 1 are covered between the two adhesive film layers 2. Two glass layers 3 are respectively covered on the side of the two adhesive film layers 2 away from the battery string 1, so that the two adhesive film layers 2 covering the multiple battery strings 1 are covered between the two glass layers 3. Among them, the first adhesive film block 4 is arranged between one group of corresponding adhesive film layers 2 and glass layers 3, and the first adhesive film block 4 is located above the multiple battery strings 1 arranged adjacently. When the photovoltaic double-glass module needs to be assembled, one of the film layers 2 is first placed on the upper surface of one of the glass layers 3, and then a plurality of battery strings 1 are arranged in an array on the upper surface of the film layer 2, and then another film layer 2 is placed on the upper surface of the plurality of battery strings 1 arranged in an array, and then a first film block 4 is placed on the upper surface of the film layer 2, and the setting position of the first film block 4 is located above the position of the interval between the plurality of adjacent battery strings 1, and finally another glass layer 3 is placed on the top of the first film block 4, so that the glass layer 3 is supported by the first film block 4. When the lamination process is performed, the glass layer 3 located above the battery string 1 will be squeezed downward due to the lamination pressure, thereby causing other components to be compressed. Among them, because the first adhesive film block 4 forms a convex structure above the battery string 1, the setting position of the first adhesive film block 4 will be subjected to force first when under pressure, and the setting position of the first adhesive film block 4 will continue to press the intervals between the multiple battery strings 1 below. As the first adhesive film block 4 gradually integrates into the adhesive film layer 2, the adjacent battery strings 1 will be squeezed on both sides of the intervals between the multiple battery strings 1 placed below, thereby fixing the setting position of the battery string 1 and preventing the battery string 1 from shifting. At the same time, as the lamination process proceeds, the first adhesive film block 4 can gradually integrate into the adhesive film layer 2, thereby supplementing the adhesive film that is missing in part of the adhesive film layer 2 due to the flow of the adhesive film layer 2, and avoiding the generation of bubbles. The setting of the first adhesive film block 4 replaces the original method of setting an anti-overpressure frame, reduces production costs, improves production efficiency, and ensures production quality while abandoning the use of the anti-overpressure frame.

[0029] It should be noted that the photovoltaic double-glass module needs to be vacuumed before lamination. The airflow generated during vacuuming will drive the melted film layer 2 to flow to the side of the photovoltaic double-glass module, thereby increasing the amount of film on the side of the photovoltaic double-glass module. In addition, because the sides of the photovoltaic double-glass module will be sealed with high-temperature tape during lamination, the photovoltaic double-glass module will be squeezed by the lamination pressure, which will drive the melted film on the side of the photovoltaic double-glass module to drive the battery string 1 to flow to the middle of the photovoltaic double-glass module, thereby causing the battery string 1 to shift. By setting the first film block 4 above the multiple adjacent battery strings 1, the intervals between the multiple battery strings 1 can be preferentially stressed at the beginning of lamination. Because the convex structure formed by the first film block 4 increases the stress during the entire lamination process, the battery string 1 can be fixed in its original position to prevent the battery string 1 from moving.

[0030] In some specific embodiments of the present invention, referring to Figure 2 There are multiple first adhesive film blocks 4, and each first adhesive film block 4 is respectively arranged above the space between two adjacent battery cells 11 of two adjacent battery strings 1. Specifically, each battery string 1 includes multiple battery cells 11 arranged and connected in sequence, so that the battery cells 11 of two adjacent battery strings 1 are also arranged adjacently in a one-to-one correspondence. Multiple first adhesive film blocks 4 are arranged correspondingly to the interval between the corresponding two adjacent battery cells 11 of two adjacent battery strings 1, so that each first adhesive film block 4 is arranged above the interval between the corresponding two adjacent battery cells 11 of two adjacent battery strings 1. When the lamination process is performed, each first adhesive film block 4 can press and squeeze the corresponding two battery cells 11, and under the cooperation of the multiple first adhesive film blocks 4, the setting positions of the multiple adjacent battery strings 1 can be fixed. This avoids the situation where the size of the first adhesive film block 4 is too large in order to fully press and squeeze the battery string 1. By limiting the size of the first adhesive film block 4, the force-bearing area during lamination is reduced, thereby increasing the pressure on the battery string 1. While improving the fixing effect of the battery string 1, the adhesive film investment of the first adhesive film block 4 is reduced, saving costs.

[0031] In some specific embodiments of the present invention, referring to Figure 2 , multiple first adhesive film blocks 4 are evenly arranged along the length direction of the battery string 1. Specifically, during lamination, the pressing effect of each first adhesive film block 4 on the battery string 1 has a certain radiation range, that is, any first adhesive film block 4 can play a fixing effect on multiple battery cells 11 of multiple battery strings 1. Multiple first adhesive film blocks 4 are evenly arranged along the length direction of the battery string 1, which can improve the utilization rate of the first adhesive film blocks 4, thereby reducing the total number of first adhesive film blocks 4, while avoiding waste and ensuring full utilization of the first adhesive film blocks 4.

[0032] In some specific embodiments of the present invention, referring to Figure 1 , multiple first adhesive film blocks 4 are respectively arranged above the battery strings 1 on both sides of the battery string 1 in the width direction and the battery strings 1 adjacent to the battery strings 1 on both sides of the battery string 1 in the width direction. Specifically, multiple battery strings 1 are arranged left and right in sequence along the width direction, and some of the multiple first adhesive film blocks 4 are arranged above the interval between two battery strings 1 on one side of the battery string 1 in the width direction, and another part of the multiple first adhesive film blocks 4 are arranged above the interval between two battery strings 1 on the other side of the battery string 1 in the width direction. Through this arrangement, while giving up the arrangement of the first adhesive film blocks 4 above the adjacent battery strings 1 located in the middle of the battery string 1 in the width direction, the fixing effect of the multiple battery strings 1 can be ensured, and the total number of the first adhesive film blocks 4 can be further reduced. While avoiding waste, the full use of the first adhesive film blocks 4 can be ensured.

[0033] In some specific embodiments of the present invention, referring to Figure 2 , 3 to 4 battery cells 11 are spaced between each two adjacent first adhesive film blocks 4 in the length direction of the battery string 1. The total number of first adhesive film blocks 4 can be reduced while ensuring full utilization of the first adhesive film blocks 4. When the number of battery cells 11 spaced between each two adjacent first adhesive film blocks 4 in the length direction of the battery string 1 is less than 3, the adhesive film of the first adhesive film block 4 will be too much, resulting in cost waste, and when the number of battery cells 11 spaced between each two adjacent first adhesive film blocks 4 in the length direction of the battery string 1 is greater than 4, it is difficult to ensure the fixing effect of the battery string 1.

[0034] Furthermore, there are 3.5 battery cells 11 between each two adjacent first adhesive film blocks 4 in the length direction of the battery string 1. This can reduce the amount of adhesive film in the first adhesive film block 4 while ensuring full utilization of the first adhesive film block 4.

[0035] In some specific embodiments of the present invention, referring to Figure 1 , both sides of the first adhesive film block 4 extend along the width direction of the battery string 1 to the top of two adjacent battery cells 11. Specifically, one side of the first adhesive film block 4 is covered and arranged above the side of the corresponding battery cell 11 of one of the battery strings 1, the middle of the first adhesive film block 4 is covered and arranged above the interval between the corresponding battery cells 11 of the two battery strings 1, and the other side of the first adhesive film block 4 is covered and arranged above the side of the corresponding battery cell 11 of the other battery string 1. It can improve the fixing effect and radiation range of the first adhesive film block 4 on the battery cells 11 of the battery string 1 during lamination.

[0036] Furthermore, the first adhesive film block 4 is a rectangular structure with length and width dimensions of 30 mm×30 mm, 30 mm×40 mm or 40 mm×40 mm, thereby ensuring the fixing effect and radiation range of the first adhesive film block 4 on the battery cells 11 of the battery string 1 .

[0037] In some specific embodiments of the present invention, referring to Figure 1 , the range of the thickness dimension H of the first adhesive film block 4 in the thickness direction of the battery string 1 is: H ≥ 0.5 mm. Specifically, the thickness of the first adhesive film block 4 is greater than or equal to 0.5 mm, that is, after the assembly of the photovoltaic double-glass module is completed, before the lamination process begins, under the action of the first adhesive film block 4, the interval between the adhesive film layer 2 and the glass layer 3 located above the battery string 1 is greater than or equal to 0.5 mm. Among them, when the thickness of the first adhesive film block 4 is less than 0.5 mm, the first adhesive film block 4 has a poor fixing effect on the battery cell 11 of the battery string 1.

[0038] In some specific embodiments of the present invention, referring to Figure 1 , and also includes: a second adhesive film block 5. The second adhesive film block 5 is arranged between the corresponding glass layer 3 and the side of the adhesive film layer 2. Specifically, the second adhesive film block 5 is arranged between the adhesive film layer 2 and the side of the glass layer 3 located above the battery string 1. During the lamination process, the photovoltaic double-glass component is squeezed by the lamination pressure, which will drive the molten adhesive film on the side of the photovoltaic double-glass component to flow to the middle of the photovoltaic double-glass component, which can easily lead to uneven thickness of the photovoltaic double-glass component. The second adhesive film block 5 can supplement the amount of adhesive film missing on the side of the photovoltaic double-glass component, so that the adhesive film is evenly distributed.

[0039] In some specific embodiments of the present invention, referring to Figure 2 There are multiple second adhesive film blocks 5, and the multiple second adhesive film blocks 5 are respectively arranged between the corresponding glass layer 3 and the four corners of the adhesive film layer 2. While ensuring the uniform distribution of the adhesive film, the adhesive film input of the second adhesive film block 5 can be reduced, saving costs.

[0040] In some specific embodiments of the present invention, the material of the first adhesive film block 4, the second adhesive film block 5 and the adhesive film layer 2 is one of POE, EPE, EVA or PVB, so that the first adhesive film block 4 and the second adhesive film block 5 can be integrated into the adhesive film layer 2 during the lamination process. In addition, the first adhesive film block 4, the second adhesive film block 5 and the adhesive film layer 2 are made of the same material, which facilitates the integration of the first adhesive film block 4 and the second adhesive film block 5 into the adhesive film layer 2.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A photovoltaic double-glass module, characterized in that: include: An adhesive film layer (2), wherein the adhesive film layer (2) comprises two layers, and the two layers of the adhesive film layer (2) are arranged opposite to each other; A battery string (1), wherein the battery string (1) is in plurality, and the plurality of battery strings (1) are arrayed and disposed between two layers of the adhesive film layers (2); A glass layer (3), wherein the glass layer (3) is composed of two layers, the two layers of the glass layer (3) correspond to the two layers of the adhesive film layer (2) in a one-to-one manner, and the glass layer (3) is arranged to cover a side of the adhesive film layer (2) away from the battery string (1); A first adhesive film block (4), the first adhesive film block (4) is arranged between the corresponding glass layer (3) and the adhesive film layer (2), and the first adhesive film block (4) is located above a plurality of adjacently arranged battery strings (1).

2. The photovoltaic double-glass assembly according to claim 1, characterized in that: There are a plurality of the first adhesive film blocks (4), and each of the first adhesive film blocks (4) is respectively arranged above two adjacent battery sheets (11) of two adjacent battery strings (1).

3. The photovoltaic double-glass assembly according to claim 2, characterized in that: The plurality of first adhesive film blocks (4) are evenly arranged along the length direction of the battery string (1).

4. The photovoltaic double-glass assembly according to claim 2, characterized in that: The plurality of first adhesive film blocks (4) are respectively arranged above the battery strings (1) on both sides in the width direction of the battery string (1) and between the battery strings (1) adjacent to the battery strings (1) on both sides in the width direction of the battery string (1).

5. The photovoltaic double-glass assembly according to claim 3, characterized in that: There are 3 to 4 battery cells (11) spaced between each two adjacent first adhesive film blocks (4) in the length direction of the battery string (1).

6. The photovoltaic double-glass assembly according to any one of claims 2 to 5, characterized in that: Both sides of the first adhesive film block (4) extend along the width direction of the battery string (1) to above two adjacently arranged battery sheets (11).

7. The photovoltaic double-glass assembly according to any one of claims 2 to 5, characterized in that: The range of the thickness dimension H of the first adhesive film block (4) in the thickness direction of the battery string (1) is: H≥0.5 mm.

8. The photovoltaic double-glass assembly according to any one of claims 2 to 5, characterized in that: Also included are: A second adhesive film block (5), the second adhesive film block (5) is arranged between the corresponding glass layer (3) and the edge of the adhesive film layer (2).

9. The photovoltaic double-glass assembly according to claim 8, characterized in that: There are a plurality of the second adhesive film blocks (5), and the plurality of the second adhesive film blocks (5) are respectively arranged between the four corners of the corresponding glass layer (3) and the adhesive film layer (2).

10. The photovoltaic double-glass assembly according to claim 8, characterized in that: The material of the first adhesive film block (4), the second adhesive film block (5) and the adhesive film layer (2) is one of POE, EPE, EVA or PVB, and the material of the first adhesive film block (4), the second adhesive film block (5) and the adhesive film layer (2) is the same.

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