Solar cell module

Abstract

The utility model relates to the field of photovoltaic technology, and discloses a solar cell module, which comprises a laminated piece and a frame, and the frame surrounds the laminated piece. The laminated part comprises a first substrate, a first adhesive film layer, a battery piece layer, a second adhesive film layer and a second substrate which are sequentially laminated from bottom to top, and the first adhesive film layer and the second adhesive film layer jointly form a packaging layer exceeding the battery piece layer; gaps exist between the packaging layer and the edges of the first substrate and the second substrate, and the solar cell module further comprises sealing parts arranged in the gaps. According to the solar cell module, the sealing part is arranged in the module, the water vapor isolation effect can be achieved, the situation that the cell pieces are corroded by water vapor is reduced, the internal resistance of the solar cell module is reduced, the power of the solar cell module is improved, and meanwhile the quality of the solar cell module is improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a solar cell assembly. Background Art

[0002] Solar cell modules are the core part of solar power generation systems. Their function is to convert solar energy into electrical energy, store the electrical energy in storage components, or drive the load to work.

[0003] A solar cell module consists of a front substrate, a back substrate, multiple cells, a film layer, and a frame. These components are stacked and laminated together, with a frame surrounding the laminate. Moisture can enter the solar cell module through the frame, corroding the cells and reducing its efficiency. This damage is particularly pronounced in areas with high humidity.

[0004] Therefore, how to solve the above technical problems should be the focus of those skilled in the art. Utility Model Content

[0005] The purpose of this application is to provide a solar cell module to reduce the corrosion of solar cells by water vapor and improve the efficiency of the module.

[0006] To solve the above technical problems, the present application provides a solar cell assembly, comprising:

[0007] A laminate, a frame, and the frame surrounds the laminate;

[0008] The laminate comprises a first substrate, a first adhesive film layer, a battery cell layer, a second adhesive film layer, and a second substrate stacked in sequence from bottom to top, wherein the first adhesive film layer and the second adhesive film layer together form an encapsulation layer extending beyond the battery cell layer;

[0009] There is a gap between the encapsulation layer and the edges of the first substrate and the second substrate;

[0010] The solar cell assembly further includes a sealing portion disposed in the gap.

[0011] Optionally, there are gaps between the encapsulation layer and four edges of the first substrate and the second substrate.

[0012] Optionally, the sealing portion includes a water-absorbing sealing portion and / or a water-blocking sealing portion.

[0013] Optionally, when the sealing portion includes the water absorbing sealing portion and the water blocking sealing portion, the water absorbing sealing portion and the water blocking sealing portion are distributed in a direction parallel to the surface of the battery layer.

[0014] Optionally, the water absorbing sealing portion and the water blocking sealing portion are distributed at intervals.

[0015] Optionally, the solar cell assembly further comprises an elastic gasket arranged between the edge of the laminate and the frame, wherein the elastic gasket is obtained by curing silicone.

[0016] Optionally, in a direction from the edge of the first adhesive film layer to the edge of the first substrate, the width of the gap ranges from 3 mm to 8 mm, including end points;

[0017] And / or, in a direction from the edge of the second adhesive film layer to the edge of the second substrate, the width of the gap ranges from 3 mm to 8 mm, inclusive.

[0018] Optionally, the first substrate is a photovoltaic backsheet, and the second substrate is a light-transmitting substrate.

[0019] Optionally, both the first substrate and the second substrate are light-transmitting substrates.

[0020] A solar cell assembly provided in the present application includes: a laminate and a frame, wherein the frame surrounds the laminate; the laminate includes a first substrate, a first adhesive film layer, a cell layer, a second adhesive film layer and a second substrate stacked in sequence from bottom to top, the first adhesive film layer and the second adhesive film layer together forming an encapsulation layer that extends beyond the cell layer; a gap exists between the encapsulation layer and the edges of the first substrate and the second substrate; the solar cell assembly also includes a sealing portion arranged in the gap.

[0021] It can be seen that the solar cell assembly of the present application includes a laminate, a frame and a sealing portion. The sealing portion is located in the gap between the encapsulation layer and the edges of the first substrate and the second substrate, that is, the side end of the cell layer is provided with a sealing portion. The sealing portion can isolate water vapor, thereby reducing the corrosion of water vapor on the cell, thereby reducing the internal resistance of the solar cell assembly, increasing the power of the solar cell assembly, and at the same time improving the quality of the solar cell assembly. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 1 A schematic structural diagram of a solar cell assembly provided in an embodiment of the present application;

[0024] Figure 2 A top view of a solar cell module provided by an embodiment of the present application before installation of a frame;

[0025] Figure 3 A partial enlarged view of a middle region A; Figure 2

[0026] Figure 4 A schematic view of the positional relationship between a first adhesive film layer and a first substrate provided by an embodiment of the present application;

[0027] Figure 5 A schematic view of the positional relationship between a second adhesive film layer and a second substrate provided by an embodiment of the present application;

[0028] Figure 6 A schematic view of the setting structure of a sealing part provided by an embodiment of the present application;

[0029] Figure 7 A comparative schematic view of a first adhesive film layer before and after lamination with a first substrate;

[0030] Figure 8 A comparative schematic view of a second adhesive film layer before and after lamination with a second substrate;

[0031] Figure 9 A comparative schematic view of a laminated part before and after lamination;

[0032] Figure 10 A schematic view of setting a sealing part in the edge gap of a laminated part;

[0033] 1, frame, 2, elastic gasket, 3, sealing part, 4, first substrate, 5, first adhesive film layer, 6, cell piece, 7, second adhesive film layer, 8, second substrate, 9, busbar, 10, encapsulation layer, 31, water absorption sealing part, 32, water blocking sealing part. DETAILED DESCRIPTION

[0034] In order to make the person skilled in the art better understand the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor are within the scope of protection of the present application.

[0035] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and the person skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.​

[0036] As described in the background technology section, water vapor can enter the interior of the solar cell module through the frame, thereby corroding the cell and affecting the power of the solar cell module.

[0037] In view of this, the present application provides a solar cell assembly, please refer to Figures 1 to 5 ,include:

[0038] A laminate, a frame 1, wherein the frame 1 surrounds the laminate;

[0039] The laminate comprises a first substrate 4, a first adhesive film layer 5, a battery cell layer, a second adhesive film layer 7 and a second substrate 8 stacked in sequence from bottom to top, wherein the first adhesive film layer 5 and the second adhesive film layer 7 together form an encapsulation layer 10 extending beyond the battery cell layer;

[0040] There is a gap between the encapsulation layer and the edges of the first substrate 4 and the second substrate 8;

[0041] The solar cell assembly further includes a sealing portion 3 disposed in the gap.

[0042] The cell layer includes a plurality of cell strings, and each cell string includes a plurality of series-connected cells 6. The cell 6 can be an N-type cell or a P-type cell.

[0043] It should be noted that the solar cell assembly also includes components such as busbars 9, which collect current from the cells and are located at both ends and in the middle of the solar cell assembly. The junction box connects the electricity generated by the solar cell assembly to external circuits.

[0044] It should be noted that in this embodiment, the materials of the first adhesive film layer 5 and the second adhesive film layer 7 are not limited and may be selected based on the specific circumstances. For example, the material of the first adhesive film layer 5 may be any material, such as PVB (Polyvinyl Butyral), POE (Polyolefin Elastomer), EVA (Ethylene Vinyl Acetate Copolymer), or EPE (EVA-POE-EVA co-extruded polyolefin composite film). The material of the second adhesive film layer 7 may be any material, such as PVB, POE, EVA, or EPE.

[0045] The material of the first adhesive film layer 5 and the material of the second adhesive film layer 7 can be the same or different, which is not limited in this embodiment.

[0046] The encapsulation layer 10 is formed by laminating and cross-linking the first adhesive film layer 5 and the second adhesive film layer 7 .

[0047] The sealing portion 3 has a sealing function and can block water vapor.

[0048] The first substrate 4 and the second substrate 8 are quadrilaterals, that is, they have four edges.

[0049] In this embodiment, there is no limitation on the situation where there is a gap between the packaging layer and the edges of the first substrate 4 and the second substrate 8 .

[0050] As an implementation method, there are gaps between the encapsulation layer 10 and the four edges of the first substrate 4 and the second substrate 8, that is, sealing parts 3 are provided between the encapsulation layer 10 and the four edges of the first substrate 4 and the second substrate 8, which can prevent water vapor from entering all the edges, and achieve the best water vapor blocking effect.

[0051] That is, before lamination, there are gaps between the four edges of the first adhesive film layer 5 and the four edges of the first substrate 4, and there are gaps between the four edges of the second adhesive film layer 7 and the four edges of the second substrate 8. In other words, before lamination, there are gaps between each edge of the first adhesive film layer 5 and the corresponding edge of the first substrate 4, such as Figure 4 As shown, there is a gap between each edge of the second adhesive film layer 7 and the corresponding edge of the second substrate 8, as shown in FIG. Figure 5 shown.

[0052] As another possible implementation manner, there is a gap between the encapsulation layer and any two edges, or any three edges, of the four edges of the first substrate and the second substrate.

[0053] It should be noted that, in this embodiment, the type of the sealing portion 3 is not limited and can be set at will.

[0054] As an implementable embodiment, the sealing portion 3 includes a water-absorbing sealing portion 31 and / or a water-blocking sealing portion 32 .

[0055] The function of the water-absorbing sealing part 31 is to absorb water vapor. The material of the water-absorbing sealing part 31 can be a water-absorbing material such as sodium polyacrylate. There is no specific limitation in this embodiment, as long as it can absorb water vapor.

[0056] The function of the water-blocking sealing portion 32 is to block water vapor. The material of the water-blocking sealing portion 32 can be a highly water-blocking material such as polyurethane, polysulfide glue, etc., which is not specifically limited in this embodiment, as long as it can block water vapor.

[0057] The frame 1 serves to secure and protect the solar cell assembly and can be made of metal or polymer materials, which are not specifically limited in this embodiment. The frame 1 has a groove into which the edge of the laminate is embedded. The position of the elastic gasket 2 is not limited in this embodiment and can be set at will.

[0058] It should be noted that the width of the gap is not limited in this embodiment and can be set at will.

[0059] As an implementation method, in the direction from the edge of the first adhesive film layer 5 to the edge of the first substrate 4, the width of the gap ranges from 3 mm to 8 mm, including the endpoint values; and / or, in the direction from the edge of the second adhesive film layer 7 to the edge of the second substrate 8, the width of the gap ranges from 3 mm to 8 mm, including the endpoint values.

[0060] For example, the width of the gap between the first adhesive film layer 5 and the edge of the first substrate 4 can be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, etc.; the width of the gap between the second adhesive film layer 7 and the edge of the second substrate 8 can be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, etc.

[0061] If the width of the gap is less than 3 mm, the sealing portion 3 has a poor effect in isolating water vapor; if the width of the gap is greater than 8 mm, that is, the width of the sealing portion 3 is too large, which will affect the entry of light and thus affect the efficiency of the component.

[0062] In the solar cell assembly of this embodiment, a sealing portion 3 is provided in the laminate. The sealing portion 3 is located in the gap between the encapsulation layer and the edges of the first substrate 4 and the second substrate 8, that is, the sealing portion 3 is provided at the side end of the cell layer. The sealing portion 3 can isolate water vapor, thereby reducing the corrosion of water vapor on the cell, thereby reducing the internal resistance of the solar cell assembly, increasing the power of the solar cell assembly, and at the same time improving the quality of the solar cell assembly.

[0063] Based on any of the above embodiments, in one embodiment of the present application, the solar cell assembly may further include an elastic gasket 2 disposed between the edge of the laminate and the frame, the elastic gasket 2 being obtained by curing silicone.

[0064] The elastic gasket 2 has two functions: one is to fix the frame 1 and the laminate, and the other is to fill the gap between the frame 1 and the laminate to prevent moisture from entering the interior of the laminate through the gap between the frame 1 and the laminate.

[0065] The material of the elastic gasket 2 can be organic silicone rubber dihydroxy polydimethylsiloxane or organic silicone, etc. Silicone is relatively low in cost and is liquid before use, which is easy to solidify, that is, easy to use, and at the same time, it has a better connection and fixing effect between the laminate and the frame 1.

[0066] As an implementable method, Figure 1 As shown, the elastic gasket 2 is located on the entire inner surface of the groove. At this time, the elastic gasket 2 is completely filled between the frame and the laminate, and the effect of blocking water vapor is the best.

[0067] In this embodiment, the solar cell assembly includes a sealing portion 3 and an elastic gasket 2. Since the elastic gasket 2 can fill the gap between the laminate and the frame 1 and block water vapor, the elastic gasket 2 and the sealing portion 3 are provided in this embodiment to enable the solar cell assembly to have a double-layer water vapor isolation effect, thereby greatly reducing the occurrence of water vapor corrosion on the cell.

[0068] Based on any of the above embodiments, in one embodiment of the present application, Figure 6 As shown, when the sealing portion 3 includes the water absorbing sealing portion 31 and the water blocking sealing portion 32 , the water absorbing sealing portion 31 and the water blocking sealing portion 32 are distributed in a direction parallel to the surface of the battery layer.

[0069] In this embodiment, the sealing portion 3 can absorb water vapor and block water vapor, which can further improve the isolation effect between the battery cell and water vapor, further reduce the probability of the battery cell being corroded by water vapor, and improve the quality of the solar cell module.

[0070] The number of the water absorption sealing portion 31 and the number of the water blocking sealing portion 32 are at least one. In this embodiment, the specific number of the water absorption sealing portion 31 and the water blocking sealing portion 32 is not limited and depends on the situation.

[0071] It should be noted that, in this embodiment, there is no limitation on the arrangement of the water absorbing sealing portion 31 and the water blocking sealing portion 32 , which may be determined according to specific circumstances.

[0072] As an implementable embodiment, the water absorption sealing portion 31 and the water blocking sealing portion 32 are spaced apart, which can achieve better water absorption and water blocking effects, further reduce the probability of water vapor corrosion of the cell, and improve the efficiency and quality of the solar cell module.

[0073] As another possible embodiment, all the water absorbing sealing parts 31 can be distributed next to each other, all the water blocking sealing parts 32 can be distributed next to each other, and then all the water absorbing sealing parts 31 and all the water blocking sealing parts 32 can be distributed in the direction parallel to the surface of the battery layer.

[0074] In one embodiment of the present application, based on any of the above embodiments, when the sealing portion 3 includes the water-absorbing sealing portion 31 and the water-blocking sealing portion 32, the water-absorbing sealing portion 31 and the water-blocking sealing portion 32 are arranged perpendicular to the surface of the battery cell layer. In other words, the water-absorbing sealing portion 31 and the water-blocking sealing portion 32 are arranged in a vertically stacked manner.

[0075] On the basis of any of the above embodiments, in one embodiment of the present application, both the first substrate 4 and the second substrate 8 are light-transmitting substrates.

[0076] The transparent substrate has good light transmission performance, high mechanical strength and corrosion resistance. The transparent substrate can be photovoltaic glass, that is, the solar cell module in this embodiment is a double-glass solar cell module, which can further improve the module efficiency.

[0077] On the basis of any of the above embodiments, in one embodiment of the present application, the first substrate 4 is a photovoltaic backsheet, and the second substrate 8 is a light-transmitting substrate.

[0078] In this embodiment, the solar cell module is a single-glass solar cell module. The second substrate 8 is located on the side facing the sunlight, ie, the front side, and the first substrate 4 is located on the back side of the module.

[0079] The manufacturing process of the solar cell module in this application is described below using a specific case.

[0080] Step 1: Load the cells and connect them in series;

[0081] Step 2: Cut the first adhesive film layer 5 and the second adhesive film layer 7. The four sides of the first adhesive film layer 5 are cut 8 mm to 12 mm shorter than the four sides of the first substrate 4, and the four sides of the second adhesive film layer 7 are cut 8 mm to 12 mm shorter than the four sides of the second substrate 8. This ensures that there is a gap between the edges of the first adhesive film layer 5 and the first substrate 4, and between the edges of the second adhesive film layer 7 and the second substrate 8 after lamination, so as to form a sealing portion.

[0082] Step 3: Cover the second substrate with a second adhesive film layer, then place the battery string, and then place the first adhesive film layer and the first substrate to form a laminate to be laminated;

[0083] Step 4, laminating the laminated laminates to form laminates, after laminating, the first adhesive film layer 5 and the second adhesive film layer 7 are crosslinked and shaped, forming an encapsulation layer 10 beyond the battery piece layer, having adhesion with the first substrate 4 and the second substrate 8, after laminating, the first adhesive film layer and the second adhesive film layer flow by about 4-5 mm, so that the gap width between the edge of the first adhesive film layer and the edge of the first substrate is 3-8 mm, and the gap width between the edge of the second adhesive film layer and the edge of the second substrate is 3-8 mm; the comparison between the first adhesive film layer 5 and the first substrate 4, and the second adhesive film layer 7 and the second substrate 8 before and after laminating is shown in Figures 7 to 9 ;

[0084] Step 5, as shown in Figure 10 , a sealing part 3 is made at the gap of the four edges of the laminated laminates;

[0085] Step 6, installing the frame, elastic gasket, junction box, etc., to obtain a solar cell module.

[0086] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between each embodiment can be referred to each other.

[0087] The solar cell module provided by the present application is described in detail above. The principles and implementation modes of the present application are described by applying specific examples in this paper. The above description of the embodiments is only used to help understand the scheme of the present application and its core idea. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A solar cell module, characterized in that: include: A laminate, a frame, and the frame surrounds the laminate; The laminate comprises a first substrate, a first adhesive film layer, a battery cell layer, a second adhesive film layer, and a second substrate stacked in sequence from bottom to top, wherein the first adhesive film layer and the second adhesive film layer together form an encapsulation layer extending beyond the battery cell layer; There is a gap between the encapsulation layer and the edges of the first substrate and the second substrate; The solar cell assembly further includes a sealing portion disposed in the gap.

2. The solar cell assembly according to claim 1, wherein There are gaps between the packaging layer and the four edges of the first substrate and the second substrate.

3. The solar cell assembly according to claim 1, wherein The sealing portion includes a water-absorbing sealing portion and / or a water-blocking sealing portion.

4. The solar cell assembly according to claim 3, wherein When the sealing portion includes the water absorbing sealing portion and the water blocking sealing portion, the water absorbing sealing portion and the water blocking sealing portion are distributed in a direction parallel to the surface of the battery sheet layer.

5. The solar cell assembly according to claim 4, wherein: The water absorption sealing portion and the water blocking sealing portion are spaced apart from each other.

6. The solar cell module according to claim 1, wherein The solar cell assembly further comprises an elastic gasket arranged between the edge of the laminate and the frame, and the elastic gasket is obtained by curing silica gel.

7. The solar cell module according to claim 1, wherein In the direction from the edge of the first adhesive film layer to the edge of the first substrate, the width of the gap ranges from 3 mm to 8 mm, including the end value; And / or, in a direction from the edge of the second adhesive film layer to the edge of the second substrate, the width of the gap ranges from 3 mm to 8 mm, inclusive.

8. The solar cell module according to any one of claims 1 to 7, wherein: The first substrate is a photovoltaic backsheet, and the second substrate is a light-transmitting substrate.

9. The solar cell module according to any one of claims 1 to 7, wherein: The first substrate and the second substrate are both light-transmitting substrates.

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