Solar cell panel

Abstract

The utility model discloses a solar cell panel, and belongs to the technical field of photovoltaic equipment. The solar cell panel provided by the utility model comprises a plurality of cell sheets, and the plurality of cell sheets are connected in pairs to form a cell panel; two surfaces of the cell panel are coated with adhesive films; and the thickness of the adhesive film at the joint of the two battery pieces is greater than that of the adhesive film at other positions. According to the utility model, when the battery pieces are connected to form the battery panel, the adhesive film is thickened at the connecting part of the battery pieces, so that the problem of uneven stress caused by height difference of the battery pieces can be eliminated, and after the battery pieces are laminated, the connecting part is not subjected to subfissure caused by stress, so that the battery panel is optimized under the condition that the gram weight of the adhesive film is not increased, and the service life of the battery panel is prolonged. And the performance of the assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic equipment, and more specifically, to a solar panel. Background Art

[0002] The core component of a solar cell is a photovoltaic module. With the update and iteration of products, in order to better collect current and achieve higher module power during the module manufacturing process, multi-grid cells are selected for the string soldering process of photovoltaic modules. However, during this process conversion, the following problems are likely to occur: for products of the same size, when the cell size increases, the string pitch decreases or even becomes a negative pitch. When the weight per square meter of the encapsulant film remains the same or is used at a low weight, there is a height difference between the cell and the solder ribbon. During the lamination process, stress is released, resulting in an obvious increase in hidden cracks at the edges of the solder ribbon and the cell. The increase in hidden cracks during module manufacturing will seriously affect a series of problems such as the service life and reliability of the module. Summary of the Utility Model

[0003] 1. Technical Problems to be Solved by the Utility Model

[0004] In view of the problem that hidden cracks in solar cells tend to increase when the cell size of a solar photovoltaic module increases in the prior art, the utility model provides a solar panel to solve the problems mentioned in the background art.

[0005] 2. Technical Solutions

[0006] To achieve the above object, the technical solution provided by the utility model is as follows:

[0007] A solar panel of the utility model includes a plurality of cells, and the plurality of cells are connected pairwise to form a panel; both sides of the panel are coated with an encapsulant film; at the connection of two cells, the thickness of the encapsulant film is greater than that at other positions.

[0008] Furthermore, the cell includes a first cell and a second cell, and the ends of the first cell and the second cell overlap to form a connection point.

[0009] Furthermore, the encapsulant film includes a sheet body part and a thickened part, and the thickened part separates the sheet body part.

[0010] Furthermore, the thickened part is located at the connection of two cells, and the sheet body part is located at the cell body.

[0011] As an improvement aspect of the utility model, the thickened part protrudes outward from the cell, and the thickened part is flush with the sheet body part on the side in contact with the cell.

[0012] As another improvement aspect of the utility model, the thickened part protrudes toward the cell side, and the thickened part is flush with the sheet body part on the side not in contact with the cell.

[0013] Further, the first solar cell and the second solar cell are connected by welding.

[0014] Further, a welding tape is arranged between the first solar cell and the second solar cell, and the first solar cell and the second solar cell are welded together through the welding tape.

[0015] Further, the connection point of the first solar cell and the second solar cell is located at the midpoint of the thickened part of the glue film.

[0016] 3. Beneficial effects

[0017] Adopting the technical solution provided by the present utility model, compared with the existing well-known technology, it has the following remarkable effects:

[0018] For a solar panel provided by the present utility model, when solar cells are connected to form a solar panel, the glue film is thickened at the connection of the solar cells, so as to eliminate the problem of uneven stress caused by the height difference of the solar cells. After lamination of the solar cells, the connection part will not cause hidden cracks due to stress, thereby optimizing the solar panel without increasing the weight of the glue film and improving the performance of the component. Description of the drawings

[0019] Figure 1 is a cross-sectional view of the glue film of the present utility model;

[0020] Figure 2 is a top view of the glue film of the present utility model;

[0021] Figure 3 is a cross-sectional view of the solar cell in Embodiment 1 of the present utility model;

[0022] Figure 4 is a cross-sectional view of the solar cell in Embodiment 2 of the present utility model.

[0023] Explanation of the reference numerals in the schematic diagram:

[0024] 1. Solar cell; 11. First solar cell; 12. Second solar cell; 2. Glue film; 21. Thickened part; 22. Sheet body part; 3. Welding tape. Specific embodiments

[0025] In order to make the above-mentioned objects, features and advantages of the utility model more obvious and understandable, the specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present utility model.

[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the present utility model, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0030] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0031] Embodiment 1

[0032] Combined with Figures 1 - 2 , a solar panel of this embodiment includes a plurality of battery cells 1, and the plurality of battery cells 1 are connected to each other in pairs to form a battery panel. In this embodiment, the battery cell 1 includes a first battery cell 11 and a second battery cell 12 connected together, where the first battery cell 11 represents the previous battery cell 1 and the second battery cell 12 represents the next battery cell 1, which does not mean that the battery panel is only composed of two battery cells 1. In this embodiment, the ends of the first battery cell 11 and the second battery cell 12 overlap to form a connection point. A glue film 2 is coated on both sides of the battery panel. At the connection of the two battery cells 1, the thickness of the glue film 2 is greater than that at other positions. In this embodiment, the glue film 2 can be selected from a variety of materials such as EVA (ethylene-vinyl acetate copolymer), POE (ethylene-α-olefin copolymer), EPE (combination of EVA and POE), etc.

[0033] Combined with Figure 3 , in this embodiment, the glue film 2 includes a sheet body part 22 and a thickened part 21, and the thickened part 21 separates the sheet body part 22. The thickened part 21 is located at the connection of the two battery cells 1, and the sheet body part 22 is located at the sheet body of the battery cell 1. The thickened part 21 of this embodiment protrudes outward from the battery cell 1, and the thickened part 21 is flush with the sheet body part 22 on the side in contact with the battery cell 1.

[0034] In this embodiment, the first battery cell 11 and the second battery cell 12 are connected by welding. Specifically, a welding tape 3 is provided between the first battery cell 11 and the second battery cell 12, and the first battery cell 11 and the second battery cell 12 are welded together through the welding tape 3. At the same time, the connection point of the first battery cell 11 and the second battery cell 12 is located at the midpoint of the thickened part 21 of the glue film 2. The distance between the thickened part 21 and the battery cell 1 is centered and aligned. When the battery cells 1 are connected to form a battery panel in this embodiment, the glue film 2 is thickened at the connection of the battery cells 1, so as to eliminate the problem of uneven stress caused by the height difference of the battery cells 1. After lamination, the connection part of the battery cells 1 will not cause hidden cracks due to stress, so the battery panel is optimized without increasing the gram weight of the glue film 2, and the performance of the component is improved.

[0035] Embodiment 2

[0036] Combined with Figure 4 , the solar panel of this embodiment is basically the same as that of Embodiment 1, except that the thickened part 21 protrudes towards the side of the battery cell 1, and the thickened part 21 is flush with the sheet body part 22 on the side that does not contact the battery cell 1.

[0037] The above schematically describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the gist of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A solar cell panel, characterized in that: The invention comprises a plurality of battery cells (1), wherein the plurality of battery cells (1) are connected in pairs to form a battery panel; the battery panel is coated with adhesive films (2) on both sides; and the thickness of the adhesive film (2) at the connection between the two battery cells (1) is greater than the thickness of the adhesive film (2) at other positions.

2. A solar cell panel according to claim 1, characterized in that: The battery cell (1) comprises a first battery cell (11) and a second battery cell (12), wherein the ends of the first battery cell (11) and the second battery cell (12) overlap to form a connection point.

3. A solar cell panel according to claim 2, characterized in that: The adhesive film (2) comprises a sheet body portion (22) and a thickened portion (21), and the thickened portion (21) separates the sheet body portion (22).

4. A solar cell panel according to claim 3, characterized in that: The thickened portion (21) is located at the connection between two battery cells (1), and the body portion (22) is located at the body of the battery cell (1).

5. A solar cell panel according to any one of claims 3 to 4, characterized in that: The thickened portion (21) protrudes toward the outside of the battery cell (1), and the thickened portion (21) is flush with the sheet body portion (22) on the side in contact with the battery cell (1).

6. A solar cell panel according to any one of claims 3-4, characterized in that: The thickened portion (21) protrudes toward the battery cell (1) side, and the thickened portion (21) is flush with the sheet body portion (22) on the side not in contact with the battery cell (1).

7. A solar cell panel according to claim 2, characterized in that: The first battery cell (11) and the second battery cell (12) are connected by welding.

8. A solar cell panel according to claim 7, characterized in that: A welding strip (3) is arranged between the first battery cell (11) and the second battery cell (12), and the first battery cell (11) and the second battery cell (12) are welded together via the welding strip (3).

9. A solar cell panel according to claim 2, characterized in that: The connection point between the first battery cell (11) and the second battery cell (12) is located at the midpoint of the thickened portion (21) of the adhesive film (2).

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