Photovoltaic module
By adopting a combined structure of solar cells, solder ribbons, and the first film in the gridless photovoltaic module, the problem of large film usage is solved, achieving cost savings and improved product yield.
Patent Information
- Application Number
- CN202422727388.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-11-08
AI Technical Summary
Existing gridless photovoltaic modules use a large amount of encapsulant film during the manufacturing process, which increases costs.
The structure adopts a combination of solar cells, solder ribbons and a first film. The solder ribbons are fixed to the solar cells through the first film, reducing the amount of adhesive film used. The second film fills the gaps in the photovoltaic module to avoid air bubbles. Thin adhesive film is used to reduce the overall adhesive film weight.
This reduces the amount of encapsulant used, saves costs, improves product yield and encapsulation effect, and avoids defects such as air bubbles inside photovoltaic modules.
Smart Images
Figure CN223540870U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic technology, and in particular to a photovoltaic module. Background Technology
[0002] In order to reduce costs and increase efficiency during the manufacturing process of solar cells, industry professionals have developed a gridless solar cell to reduce the amount of silver paste used.
[0003] Photovoltaic modules with gridless solar cells are generally called gridless photovoltaic modules. In the manufacturing process of gridless photovoltaic modules, since there is no PAD (Pressure Welding Pad) to weld and fix the solder ribbons and solar cells to the grid, a coating layer is first used to fix the solder ribbons and cells to form a cell string interconnection structure. Then, the cell string is encapsulated using the front and back films of conventional photovoltaic modules. This results in a large amount of encapsulant used in existing gridless photovoltaic modules, increasing the basis weight of the encapsulant and thus increasing costs.
[0004] Therefore, there is an urgent need to design a photovoltaic module to solve the above technical problems. Utility Model Content
[0005] The purpose of this invention is to propose a photovoltaic module that reduces the amount of encapsulant used, thereby saving costs.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] This utility model provides a photovoltaic module, comprising:
[0008] A battery string, comprising battery cells, solder ribbons, a first film, and a second film, wherein the solder ribbons are laid flat on the battery cells, the first film is laid flat on the solder ribbons, and the first film is configured to fix the solder ribbons to the battery cells; the second film fills the long side and / or the short side of the photovoltaic module.
[0009] The solar cell is a gridless solar cell.
[0010] As an optional technical solution for photovoltaic modules, the first film and the solder ribbon are both configured as multiple strips, and the multiple solder ribbons are arranged at equal intervals, and the multiple first films are arranged at equal intervals.
[0011] As an optional technical solution for photovoltaic modules, the length direction of the first film is parallel or perpendicular to the length direction of the solder strip.
[0012] As an optional technical solution for photovoltaic modules, the first film and the welding strip are arranged at an acute angle.
[0013] As an optional technical solution for photovoltaic modules, the length direction of the first film is parallel to the length direction of the solder strip, and the first film and the solder strip correspond one-to-one; in the direction perpendicular to the light received by the solar cell, the projected area of the first film is larger than the projected area of the solder strip.
[0014] As an optional technical solution for photovoltaic modules, the photovoltaic module further includes a third film, and the solar cells are configured in multiple ways, with the third film filling between any two solar cells.
[0015] As an optional technical solution for photovoltaic modules, the photovoltaic module further includes a fourth film, and the battery strings are configured in multiple ways, with the fourth film filling between any two battery strings.
[0016] As an optional technical solution for photovoltaic modules, the photovoltaic module further includes a first encapsulant film and a second encapsulant film, wherein the first encapsulant film is disposed on the light-receiving surface of the battery string and the second encapsulant film is disposed on the back-lighting surface of the battery string;
[0017] The thickness of both the first and second adhesive films is set to be between 200 micrometers and 350 micrometers.
[0018] As an optional technical solution for photovoltaic modules, the photovoltaic module further includes a front glass and a back sheet, wherein the front glass is disposed on the first encapsulating film and the back sheet is disposed on the second encapsulating film.
[0019] As an optional technical solution for photovoltaic modules, the backsheet is a back glass and the solar cells are bifacial solar cells.
[0020] The beneficial effects of this utility model include at least the following:
[0021] This utility model provides a photovoltaic module, which mainly includes a battery string. The battery string includes battery cells, a solder ribbon, and a first film. The solder ribbon is laid flat on the battery cells, and the first film is laid flat on the solder ribbon, configured to fix the solder ribbon to the battery cells. A second film fills the long side and / or the short side of the photovoltaic module. The battery cells include gridless battery cells.
[0022] The first film secures the solder ribbon to the solar cell, replacing the existing method of using a whole sheet of film for fixation. This reduces the amount of adhesive film used and its weight, thus saving costs. The second film helps fill the gaps inside the photovoltaic module as much as possible during subsequent lamination processes, preventing defects such as air bubbles and improving product yield. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the battery cell, solder ribbon, and first film (the first film is parallel to the solder ribbon) provided in an embodiment of this utility model;
[0025] Figure 2 for Figure 1 A side view of the battery cell, solder ribbon, and first film (viewing angle parallel to the length direction of the solder ribbon);
[0026] Figure 3 for Figure 1 A front view of the battery cell, solder ribbon, and first membrane (viewing angle perpendicular to the length direction of the solder ribbon);
[0027] Figure 4 This is a schematic diagram of the battery cell, solder ribbon, and first film (the first film is perpendicular to the solder ribbon) provided in an embodiment of this utility model;
[0028] Figure 5 for Figure 4 A side view of the battery cell, solder ribbon, and first film (viewing angle parallel to the length direction of the solder ribbon);
[0029] Figure 6 for Figure 4 A front view of the battery cell, solder ribbon, and first membrane (viewing angle perpendicular to the length direction of the solder ribbon);
[0030] Figure 7 This is a schematic diagram of the manufacturing process of the photovoltaic module provided in this embodiment of the utility model.
[0031] Figure Labels
[0032] 100. Battery string; 110. Battery cell; 120. Welding strip; 130. First film; 200. Second film; 300. Third film; 400. Fourth film; 500. First adhesive film; 600. Second adhesive film; 700. Front glass; 800. Back panel. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0036] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0037] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0039] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0040] This embodiment provides a photovoltaic module that can reduce the amount of encapsulant used, thereby saving costs.
[0041] like Figures 1-6 As shown, the photovoltaic module mainly includes a cell string 100. The cell string 100 includes a cell 110, a solder ribbon 120, a first film 130, and a second film 200. The solder ribbon 120 is laid flat on the cell 110, and the first film 130 is laid flat on the solder ribbon 120. The first film 130 is configured to fix the solder ribbon 120 to the cell 110. The second film 200 fills the long side and / or short side of the photovoltaic module. The cell 110 is a gridless cell. The length direction of the first film 130 is parallel or perpendicular to the length direction of the solder ribbon 120, or intersects at an acute angle to form a mesh structure.
[0042] Based on the above design, in this embodiment, the solder ribbon 120 is attached and fixed to the solar cell 110 using the first film 130, thereby replacing the existing full-sheet coating solution, reducing the amount of adhesive film used, lowering the adhesive film weight, and achieving cost savings. The second film 200 can fill the gaps inside the photovoltaic module as much as possible during subsequent lamination processes, avoiding defects such as air bubbles inside the photovoltaic module and improving product yield.
[0043] In this embodiment, the length direction of the first membrane 130 can be parallel to the length direction of the welding strip 120, perpendicular to each other, or intersecting at an acute angle to form a mesh structure, thereby improving the flexibility and versatility of the arrangement of the first membrane 130 relative to the welding strip 120.
[0044] Optionally, the first membrane 130 in this embodiment can be made of EVA material or POE material. Of course, operators can also choose other materials to make it according to actual needs. This embodiment will not elaborate on this further.
[0045] Optionally, in this embodiment, multiple first films 130 and welding ribbons 120 are provided, with the multiple welding ribbons 120 and the multiple first films 130 being equally spaced. The provision of multiple first films 130 can improve the reliability and stability of the first films 130 fixing the welding ribbons 120, and avoid the phenomenon of poor contact between the welding ribbons 120 and the battery cells 110.
[0046] Optionally, when the length direction of the first film 130 is parallel to the length direction of the solder strip 120, the first film 130 and the solder strip 120 correspond one-to-one, so that each solder strip 120 can be attached and fixed by the first film 130, avoiding the phenomenon of poor contact between the solder strip 120 and the battery cell 110.
[0047] Furthermore, along the direction perpendicular to the light-receiving surface of the battery cell 110, the projected area of the first film 130 is larger than the projected area of the solder ribbon 120. This increases the contact area of the first film 130 with the solder ribbon 120, improves the reliability and stability of the first film 130 fixing the solder ribbon 120, and increases the product yield.
[0048] like Figure 7 As shown, in this embodiment, the photovoltaic module further includes a second film 200, a third film 300, and a fourth film 400. The second film 200 fills the long side and / or the short side of the photovoltaic module. In other words, the second film 200 can fill the long side, the short side, or both sides simultaneously. The third film 300 fills between any two solar cells 110, and the fourth film 400 fills between any two solar strings 100.
[0049] It is understood that in this embodiment, the second film 200 can fill around the photovoltaic module, the third film 300 can fill between cells, and the fourth film 400 can fill between strings.
[0050] In this embodiment, the photovoltaic module can have only one cell string 100 or multiple cell strings 100, each cell string 100 having multiple solar cells 110. When a single cell string 100 is used, the fourth film 400 fills around the cell string 100; when multiple cell strings 100 are used, the multiple cell strings 100 form a cell string array, and the fourth film 400 fills around the cell string array.
[0051] By setting up the second film 200, the third film 300 and the fourth film 400, the voids inside the photovoltaic module can be filled as much as possible during the subsequent lamination process, avoiding defects such as bubbles inside the photovoltaic module and improving product yield.
[0052] Preferably, in this embodiment, the third membrane 300 is preferably filled in the junction box position in the middle of the photovoltaic module to avoid large gaps at the busbar position of the junction box.
[0053] Preferably, in this embodiment, the fourth film 400 is filled between two parallel battery strings 100, and the fourth film 400 is parallel to the long side of the photovoltaic module.
[0054] Optionally, this embodiment does not limit the number and shape of the second membrane 200, the third membrane 300, and the fourth membrane 400. For example, the second membrane 200, the third membrane 300, and the fourth membrane 400 can all be set as strips. The materials of the second membrane 200, the third membrane 300, and the fourth membrane 400 can all be made of EVA or POE material.
[0055] like Figure 7 As shown, in this embodiment, the photovoltaic module further includes a first encapsulating film 500 and a second encapsulating film 600. The first encapsulating film 500 is disposed on the light-receiving surface of the cell string 100, and the second encapsulating film 600 is disposed on the back-lighting surface of the cell string 100. In other words, the materials of the first encapsulating film 500 and the second encapsulating film 600 in this embodiment are the same as the materials of the front and back encapsulating films in the prior art. However, the difference is that the thickness of the first encapsulating film 500 in this embodiment is less than that of the front encapsulating film in the prior art, and the thickness of the second encapsulating film 600 is less than that of the back encapsulating film in the prior art. This allows the photovoltaic module to still have a good encapsulation effect while reducing the film weight of the photovoltaic module, thereby achieving the goal of cost saving.
[0056] For example, in this embodiment, the thickness of both the first adhesive film 500 and the second adhesive film 600 can be set between 200 micrometers and 350 micrometers, preferably 300 micrometers. In contrast, the thickness of conventional front adhesive film and back adhesive film in the prior art is both above 400 micrometers.
[0057] It should be noted that, depending on actual needs (e.g., when both the first encapsulating film 500 and the second encapsulating film 600 are relatively thin), operators can add two layers of second film 200, two layers of third film 300, and two layers of fourth film 400 to ensure the encapsulation effect and minimize the occurrence of air bubbles inside the photovoltaic module. The two layers of second film 200 are located on both sides of the thickness direction of the cell string 100, the two layers of third film 300 are located on both sides of the thickness direction of the cell string 100, and the two layers of fourth film 400 are located on both sides of the thickness direction of the cell string 100.
[0058] like Figure 7 As shown, in this embodiment, the photovoltaic module also includes a front glass 700 and a back sheet 800. The front glass 700 is disposed on a first adhesive film 500, and the back sheet 800 is disposed on a second adhesive film 600. Then, a lamination process is performed so that the adhesive film can form a molten state and bond the solar cell 110, the front glass 700, and the back sheet 800 together, providing encapsulation and protection for the photovoltaic module. This encapsulation can extend the service life of the photovoltaic module and ensure that it can still operate stably in harsh outdoor environments.
[0059] Optionally, in some embodiments, the backsheet 800 can be configured as a back glass, and the solar cell 110 can be configured as a bifacial solar cell, thereby creating a photovoltaic module that can generate electricity from both sides, improving power generation efficiency and saving costs.
[0060] It should be emphasized that the adhesive film mentioned in this embodiment can be regarded as a collective term for the first film 130, the second film 200, the fourth film 400, the first adhesive film 500, and the second adhesive film 600.
[0061] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
[0062] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
Claims
1. A photovoltaic module, characterized in that, include: A battery string (100) includes a battery cell (110), a solder ribbon (120), a first film (130), and a second film (200). The solder ribbon (120) is laid flat on the battery cell (110), and the first film (130) is laid flat on the solder ribbon (120). The first film (130) is configured to fix the solder ribbon (120) to the battery cell (110). The second film (200) fills the long side and / or the short side of the photovoltaic module. The solar cell (110) is a gridless solar cell.
2. The photovoltaic module according to claim 1, characterized in that, The first film (130) and the welding strip (120) are both set to multiple strips, and the multiple welding strips (120) are set at equal intervals, and the multiple first films (130) are set at equal intervals.
3. The photovoltaic module according to claim 1, characterized in that, The length direction of the first film (130) is parallel or perpendicular to the length direction of the welding strip (120).
4. The photovoltaic module according to claim 1, characterized in that, The first membrane (130) and the welding strip (120) are arranged at an acute angle.
5. The photovoltaic module according to claim 3, characterized in that, The length direction of the first film (130) is parallel to the length direction of the solder strip (120), and the first film (130) and the solder strip (120) correspond one-to-one; in the direction perpendicular to the light-receiving direction of the battery cell (110), the projected area of the first film (130) is larger than the projected area of the solder strip (120).
6. The photovoltaic module according to claim 1, characterized in that, The photovoltaic module further includes a third film (300), and the solar cells (110) are configured in multiple ways, with the third film (300) filling between any two solar cells (110).
7. The photovoltaic module according to claim 1, characterized in that, The photovoltaic module also includes a fourth film (400), and the battery strings (100) are configured in multiple ways, with the fourth film (400) filling between any two battery strings (100).
8. The photovoltaic module according to claim 1, characterized in that, The photovoltaic module further includes a first encapsulant film (500) and a second encapsulant film (600), wherein the first encapsulant film (500) is disposed on the light-receiving surface of the battery string (100) and the second encapsulant film (600) is disposed on the backlight surface of the battery string (100); The thickness of the first adhesive film (500) and the thickness of the second adhesive film (600) are both set to be between 200 micrometers and 350 micrometers.
9. The photovoltaic module according to claim 8, characterized in that, The photovoltaic module also includes a front glass (700) and a back sheet (800), the front glass (700) being disposed on the first encapsulant film (500) and the back sheet (800) being disposed on the second encapsulant film (600).
10. The photovoltaic module according to claim 9, characterized in that, The back panel (800) is a back glass, and the battery cell (110) is a double-sided battery cell.