Photovoltaic module
By using a first adhesive film to bond the solar cells to the cover plate in the photovoltaic module, and setting a second adhesive film with higher strength on the outer periphery, the problem of poor adhesion between the POE film and the glass is solved, achieving a firm connection between the solar cells and the cover plate and protection against aging and corrosion, thus improving the reliability of the module.
Patent Information
- Application Number
- CN202423082169.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-12-13
AI Technical Summary
In photovoltaic modules, the POE film of single-glass modules has poor adhesion to the glass, which leads to the aging of the EVA film and corrosion on the front of the cell. Especially after high-temperature lamination, there is less adhesive film at the edge, which can easily cause the front film to detach from the glass, affecting the reliability of the module.
A first adhesive film is used to bond the battery cell to a first cover plate. The outer periphery is spaced apart from the edge of the cover plate. A second adhesive film is located in between and has a stronger adhesive force than the first adhesive film. The overlapping part and the connecting part are connected at an angle. The second adhesive film is located in the gap between them. The overlapping part and the cover plate are connected to form a gap to avoid aging and corrosion.
This enhances the connection between the solar cells and the cover plate, prevents corrosion of the solar cells due to adhesive film aging, and improves the reliability of the photovoltaic module.
Smart Images
Figure CN223714501U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to photovoltaic technology field especially a kind of photovoltaic module. BACKGROUND
[0002] Currently, the front film of single-glass module in photovoltaic module uses POE (Polyolefin Elastomer Film, i.e. polyolefin elastomer) film, and the back film uses EVA (ethylene-vinyl acetate copolymer, i.e. ethylene-vinyl acetate copolymer) film, but the adhesion of POE film to glass is poor. If the front film uses EVA film, it will cause the EVA film to age and seriously corrode the positive side of the battery, especially the edge of the photovoltaic module. After high-temperature lamination, there is less adhesive film at the edge, which makes it more likely for the front film to separate from the glass. SUMMARY
[0003] The utility model aims at at least one of the technical problems existing in the prior art. To this end, one object of the utility model is to provide a photovoltaic module, which can ensure the adhesion between the battery sheet and the first cover plate, and can also avoid the corrosion of the battery sheet caused by the aging of the adhesive film, thereby improving the reliability of the photovoltaic module.
[0004] According to the photovoltaic module of the first aspect of the utility model, the battery sheet is arranged on the back surface of the first cover plate, the battery sheet is adhered to the first cover plate by the first adhesive film, the outer periphery of the first adhesive film is arranged at a certain distance from the edge of the first cover plate on at least one side, the second adhesive film is located on at least one side of the outer periphery of the first adhesive film, the second adhesive film is adhered to the first cover plate, and the adhesion of the second adhesive film is higher than that of the first adhesive film.
[0005] Therefore, the battery sheet in the photovoltaic module is adhered to the first cover plate by the first adhesive film, which can ensure the connection between the battery sheet and the first cover plate. There is a gap between one side of the outer periphery of the first adhesive film and the edge of the first cover plate. The second adhesive film is located between the first adhesive film and the first cover plate, and the adhesion of the second adhesive film is stronger than that of the first adhesive film. This can make the connection between the battery sheet and the first cover plate more firm, and can also avoid the corrosion of the battery sheet caused by the aging of the second adhesive film, thereby improving the reliability of the photovoltaic module.
[0006] According to some embodiments of the utility model, the first adhesive film comprises a main body and a lap joint portion. The battery sheet is adhered to the first cover plate by the main body. The lap joint portion is connected to at least one side of the outer periphery of the main body, and the lap joint portion is lap jointed to the back surface of the second adhesive film.
[0007] According to some embodiments of the present application, the first adhesive film further comprises a connecting portion, the connecting portion is connected to the main body and the overlapping portion in an inclined manner, a gap is formed between the second adhesive film and the main body, and the connecting portion corresponds to the gap.
[0008] According to some embodiments of the present application, the width of the overlapping portion is d1, the width of the second adhesive film is d2, and d1 and d2 satisfy the relationship: 1mm≤d1
[0009] According to some embodiments of the present application, the width of the overlapping portion is d1, and d1 satisfies the relationship: 5mm≤d1≤10mm.
[0010] According to some embodiments of the present application, the width of the second adhesive film is d2, and d2 satisfies the relationship: 15mm≤d2≤25mm.
[0011] According to some embodiments of the present application, the outer periphery of the first adhesive film is spaced apart from the edge of the first cover plate, and the second adhesive film is an integral film and is arranged around the first adhesive film.
[0012] According to some embodiments of the present application, the outer peripheral edge of the first adhesive film is flush with the outer peripheral edge of the first cover plate.
[0013] According to some embodiments of the present application, the photovoltaic module further comprises a second cover plate and a third adhesive film, and the cell piece is adhered to the second cover plate through the third adhesive film.
[0014] According to some embodiments of the present application, the first adhesive film is a POE film, and the second adhesive film is an EVA film.
[0015] Compared with the prior art, the present application adopts the mode that the cell piece is adhered to the first cover plate through the first adhesive film, which can ensure the connection between the cell piece and the first cover plate, there is a gap between the outer peripheral side of the first adhesive film and the edge of the first cover plate, the second adhesive film is located between the first adhesive film and the first cover plate, and the adhesive force of the second adhesive film is stronger than that of the first adhesive film, which can make the connection between the cell piece and the first cover plate more firm, and can also avoid the corrosion of the second adhesive film aging on the cell piece, thereby improving the reliability of the photovoltaic module.
[0016] Additional aspects and advantages of the present application will be given in part in the following description, and will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0017] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the references to the following drawings, of which:
[0018] Figure 1 is an exploded view of the photovoltaic module according to the embodiments of the present application.
[0019] Reference Signs:
[0020] 100, photovoltaic module;
[0021] 10, first cover plate; 20, cell piece; 30, first adhesive film; 31, main body; 32, overlapping portion; 33, connecting portion; 34, gap; 40, second adhesive film; 50, second cover plate; 60, third adhesive film. DETAILED DESCRIPTION
[0022] The embodiments of the present application will be described in detail below, and the embodiments described with reference to the drawings are exemplary, and the embodiments of the present application will be described in detail below.
[0023] The embodiments of the present application will be described in detail below, and the embodiments described with reference to the drawings are exemplary, and the embodiments of the present application will be described in detail below. Figure 1 The photovoltaic module 100 according to the embodiments of the present application will be described below with reference to
[0024] As shown in Figure 1 The photovoltaic module 100 according to the first aspect of the present application comprises a first cover plate 10, a cell piece 20, a first adhesive film 30 and a second adhesive film 40. The cell piece 20 is arranged on the back surface of the first cover plate 10, and the cell piece 20 is adhered to the first cover plate 10 by the first adhesive film 30. The outer periphery of the first adhesive film 30 is arranged at a distance from the edge of the first cover plate 10 on at least one side. The second adhesive film 40 is arranged on at least one side of the outer periphery of the first adhesive film 30, and the second adhesive film 40 is adhered to the first cover plate 10. The adhesive force of the second adhesive film 40 is higher than that of the first adhesive film 30.
[0025] It can be understood that the first cover plate 10, the cell piece 20, the first adhesive film 30 and the second adhesive film 40 constitute the main body 31 structure of the photovoltaic module 100. The cell piece 20 is arranged on the back surface of the first cover plate 10, so that the first cover plate 10 can protect the cell piece 20, thereby ensuring the performance of the cell piece 20 and prolonging the service life of the cell piece 20. For example, the first cover plate 10 can be a front cover plate or a back cover plate, and the second cover plate 50 is arranged opposite to the first cover plate 10.
[0026] The first adhesive film 30 is located between the battery piece 20 and the first cover plate 10, so that the first adhesive film 30 can provide adhesion between the battery piece 20 and the first cover plate 10, so that the battery piece 20 can be adhered to the first cover plate 10, and the outer periphery of the first adhesive film 30 is arranged at a distance from the edge of the first cover plate 10, so that a gap 34 is formed between the outer periphery of the first adhesive film 30 and the edge of the first cover plate 10, so that the second adhesive film 40 can be arranged in the gap 34, one side of the second adhesive film 40 is adhered to the edge of the first cover plate 10, and the other side is adhered to the first adhesive film 30, so that the outer periphery of the first adhesive film 30 and the edge of the first cover plate 10 are connected. For example, the distance between the edge of the first adhesive film 30 and the edge of the first cover plate 10 is 10-20mm, which facilitates the arrangement of the second adhesive film 40 between the first adhesive film 30 and the first cover plate 10, and also allows the second adhesive film 40 to connect the first adhesive film 30 and the first cover plate 10.
[0027] In particular, the adhesion of the second adhesive film 40 is higher than that of the first adhesive film 30, which can make the battery piece 20 more firmly connected to the first cover plate 10 through the first adhesive film 30 and the second adhesive film 40, and can also avoid the corrosion of the second adhesive film 40 to the battery piece 20 due to aging, thereby ensuring the connection between the battery piece 20 and the first cover plate 10, and further improving the reliability of the photovoltaic module 100.
[0028] For example, the first adhesive film 30 is a POE film, and the second adhesive film 40 is an EVA film, which can improve the adhesion between the battery piece 20 and the first cover plate 10, and the EVA film is located between the edge of the POE film and the edge of the first cover plate 10, so that the aging of the EVA film is far away from the battery piece 20, thereby avoiding the corrosion of the battery piece 20 by the EVA film.
[0029] Therefore, the battery piece 20 in the photovoltaic module 100 is adhered to the first cover plate 10 through the first adhesive film 30, which can ensure the connection between the battery piece 20 and the first cover plate 10, and the gap 34 exists between one side of the outer periphery of the first adhesive film 30 and the edge of the first cover plate 10, and the second adhesive film 40 is located between the first adhesive film 30 and the first cover plate 10, and the adhesion of the second adhesive film 40 is stronger than that of the first adhesive film 30, which can make the battery piece 20 and the first cover plate 10 more firmly connected, and can also avoid the corrosion of the battery piece 20 by the second adhesive film 40 due to aging, thereby improving the reliability of the photovoltaic module 100.
[0030] In particular, the adhesion of the second adhesive film 40 is higher than that of the first adhesive film 30, which can make the battery piece 20 more firmly connected to the first cover plate 10 through the first adhesive film 30 and the second adhesive film 40, and can also avoid the corrosion of the second adhesive film 40 to the battery piece 20 due to aging, thereby ensuring the connection between the battery piece 20 and the first cover plate 10, and further improving the reliability of the photovoltaic module 100. Figure 1As shown, the first adhesive film 30 comprises a main body 31 and a lap joint 32, the battery sheet 20 is adhered to the first cover plate 10 through the main body 31, the lap joint 32 is connected to at least one side of the outer periphery of the main body 31, and the lap joint 32 is lapped on the back of the second adhesive film 40.
[0031] It can be understood that the main body 31 and the lap joint 32 constitute the main body 31 structure of the first adhesive film 30, the lap joint 32 is connected to both sides of the main body 31, the main plate is located between the battery sheet 20 and the first cover plate 10, so that the battery sheet 20 can be connected to the first cover plate 10 through the main body 31, and the integrity of the battery sheet 20 and the first cover plate 10 can be ensured, and the lap joint 32 is located on the back of the second adhesive film 40, so that the second adhesive film 40 is located between the lap joint 32 and the first cover plate 10, so that the lap joint 32 can be connected to the first cover plate 10 through the second adhesive film 40, and the connection between the battery sheet 20 and the first cover plate 10 is more firm, and the corrosion of the second adhesive film 40 aging to the battery sheet 20 can be avoided.
[0032] In addition, as shown in Figure 1 The first adhesive film 30 further comprises a connecting part 33, the connecting part 33 is connected to the main body 31 and the lap joint 32 obliquely, a gap 34 is formed between the second adhesive film 40 and the main body 31, and the connecting part 33 corresponds to the gap 34.
[0033] That is, the connecting part 33 is located between the main body 31 and the lap joint 32, and the connecting part 33 is arranged obliquely relative to the main body 31 and the lap joint 32, and the main body 31 and the lap joint 32 are arranged in parallel, so that the front of the lap joint 32 and the connecting part 33 and the first cover plate 10 form the gap 34, the connecting part 33 corresponds to the gap 34, so that the second adhesive film 40 is located between the lap joint 32 and the first cover plate 10, so that the lap joint 32 can be connected to the first cover plate 10 through the second adhesive film 40, and the connection between the battery sheet 20 and the first cover plate 10 is more firm, and the corrosion of the second adhesive film 40 aging to the battery sheet 20 can be avoided
[0034] Optionally, as shown in Figure 1 The width of the lap joint 32 is d1, the width of the second adhesive film 40 is d2, and d1 and d2 satisfy the relationship: 1mm≤d1
[0035] Understandably, the width of the overlap portion 32 and the width of the second adhesive film 40 must be within a reasonable range. If the width of the overlap portion 32 and the width of the second adhesive film 40 are less than 1 mm, the bonding area of the overlap portion 32 and the second adhesive film 40 will be too small, resulting in most of the battery cell 20 being connected to the main body 31, which in turn will make it easy for the battery cell 20 to detach from the first cover plate 10. If the width of the overlap portion 32 is greater than the width of the second adhesive film 40, the adhesive force provided by the second adhesive film 40 to the first cover plate 10 and the first adhesive film 30 will be too small, resulting in most of the battery cell 20 being connected to the main body 31, which in turn will make it easy for the battery cell 20 to detach from the first cover plate 10. If the width of the overlap portion 32 and the width of the second adhesive film 40 are within a reasonable range, it can ensure that the outer periphery of the first adhesive film 30 is firmly connected to the first cover plate 10 through the second adhesive film 40, thereby making the connection between the battery cell 20 and the first cover plate 10 more secure.
[0036] Optionally, such as Figure 1 As shown, the width of the overlap portion 32 is d1, and d1 satisfies the relationship: 5mm≤d1≤10mm. That is to say, the width of the overlap portion 32 should be within a reasonable range. If the width of the overlap portion 32 is less than 5mm, the bonding area between the overlap portion 32 and the second adhesive film 40 will be too small, resulting in most of the battery cell 20 being connected to the main body 31, which will make it easy for the battery cell 20 to detach from the first cover plate 10. If the width of the overlap portion 32 is greater than 10mm, the area of the overlap portion 32 will be too large, resulting in waste of the material of the overlap portion 32. If the overlap portion 32 is within a reasonable range, it can ensure the firmness of the connection between the battery cell 20 and the first cover plate 10, and also achieve the purpose of saving costs.
[0037] Optionally, such as Figure 1 As shown, the width of the second adhesive film 40 is d2, which satisfies the relationship: 15mm ≤ d2 ≤ 25mm. That is, the width of the second adhesive film 40 must be within a reasonable range. If the width of the second adhesive film 40 is less than 15mm, the bonding area between the overlap 32 and the second adhesive film 40 will be too small, resulting in most of the battery cell 20 being connected to the main body 31, which in turn makes it easy for the battery cell 20 to detach from the first cover plate 10. If the width of the second adhesive film 40 is greater than 25mm, the area of the second adhesive film 40 will be too large, leading to aging of the second adhesive film 40 and corrosion of the battery cell 20. If the width of the second adhesive film 40 is within a reasonable range, it can ensure the firmness of the connection between the battery cell 20 and the first cover plate 10, and also prevent the aging of the second adhesive film 40 from corroding the battery cell 20.
[0038] In addition, such as Figure 1As shown, the outer periphery of the first adhesive film 30 is spaced apart from the edge of the first cover plate 10, and the second adhesive film 40 is an integral film and is arranged around the first adhesive film 30. It can be understood that the outer periphery of the first adhesive film 30 forms a gap 34 with the edge of the first cover plate 10, thereby facilitating the arrangement of the second adhesive film 40 between the first adhesive film 30 and the first cover plate 10, and the second adhesive film 40 is an integral film, and the second adhesive film 40 is arranged around the first adhesive film 30, thereby enabling the second adhesive film 40 to connect the first adhesive film 30 and the first cover plate 10, and thereby enabling the battery piece 20 to be more firmly connected with the first cover plate 10 through the first adhesive film 30 and the second adhesive film 40.
[0039] In particular, as shown in the drawings, Figure 1 The outer peripheral edge of the first adhesive film 30 is flush with the outer peripheral edge of the first cover plate 10, so that the outer peripheral edge of the first adhesive film 30 does not protrude from the first cover plate 10, thereby ensuring the overall performance of the photovoltaic module 100, and also preventing the first adhesive film 30 from interfering with the first cover plate 10.
[0040] In addition, as shown in the drawings, Figure 1 The photovoltaic module 100 further comprises a second cover plate 50 and a third adhesive film 60, and the battery piece 20 is adhered to the second cover plate 50 through the third adhesive film 60. It can be understood that the battery piece 20 is located between the first cover plate 10 and the second cover plate 50, one side of the battery piece 20 is connected with the first cover plate 10 through the first adhesive film 30 and the second adhesive film 40, and the other side of the battery piece 20 is connected with the second cover plate 50 through the third adhesive film 60, thereby enabling the battery piece 20 to be connected with both the first cover plate 10 and the second cover plate 50, and thereby enabling the first cover plate 10 and the second cover plate 50 to ensure the use performance of the battery piece 20.
[0041] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0042] In the description of the utility model, "first feature", "second feature" can include one or more features. In the description of the utility model, "multiple" means two or more. In the description of the utility model, "above" or "below" of the first feature in the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. In the description of the utility model, "above", "above" and "above" of the first feature in the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height.
[0043] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.
[0044] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.
Claims
1. A photovoltaic module (100), characterized in that, Comprise: a first cover plate (10); a battery sheet (20); a first adhesive film (30), the battery sheet (20) is adhered to the first cover plate (10) through the first adhesive film (30), and the outer periphery of the first adhesive film (30) is arranged at a distance from the edge of the first cover plate (10) on at least one side; a second adhesive film (40), the second adhesive film (40) is arranged on the outer periphery of the first adhesive film (30) on at least one side, and the second adhesive film (40) is adhered to the first cover plate (10), and the adhesive force of the second adhesive film (40) is higher than that of the first adhesive film (30).
2. The photovoltaic module (100) according to claim 1, characterized in that The first adhesive film (30) comprises: a main body (31), the battery sheet (20) is adhered to the first cover plate (10) through the main body (31); a lap joint portion (32), the lap joint portion (32) is connected to the outer periphery of the main body (31) on at least one side, and the lap joint portion (32) is lap jointed to the back of the second adhesive film (40).
3. The photovoltaic module (100) according to claim 2, characterized in that The first adhesive film (30) further comprises: a connecting portion (33), the connecting portion (33) is obliquely connected to the main body (31) and the lap joint portion (32), and a gap (34) is formed between the second adhesive film (40) and the main body (31), and the connecting portion (33) corresponds to the gap (34).
4. The photovoltaic module (100) according to claim 2, characterized in that The width of the lap joint portion (32) is d1, the width of the second adhesive film (40) is d2, and d1 and d2 satisfy the relationship: 1mm≤d1<d2.
5. The photovoltaic module (100) according to claim 4, characterized in that The width of the lap joint portion (32) is d1, and d1 satisfies the relationship: 5mm≤d1≤10mm.
6. The photovoltaic module (100) according to claim 1, characterized in that The width of the second adhesive film (40) is d2, and d2 satisfies the relationship: 15mm≤d2≤25mm.
7. The photovoltaic module (100) according to claim 1, characterized in that The outer periphery of the first adhesive film (30) is arranged at a distance from the edge of the first cover plate (10) on all sides, and the second adhesive film (40) is an integral film and is arranged around the first adhesive film (30).
8. The photovoltaic module (100) according to claim 1, characterized in that The outer periphery edge of the first adhesive film (30) is flush with the outer periphery edge of the first cover plate (10).
9. The photovoltaic module (100) according to claim 1, characterized in that Further comprise: a second cover plate (50); a third adhesive film (60), the battery sheet (20) is adhered to the second cover plate (50) through the third adhesive film (60).
10. The photovoltaic module (100) according to any of claims 1 to 9, characterized in that The first adhesive film (30) is a POE film, and the second adhesive film (40) is an EVA film.