Novel photovoltaic module
The novel PV module design encapsulates cell strings within a flexible envelope to overcome the 11mm distance constraint, improving fill factor and efficiency by allowing closer packing.
Patent Information
- Application Number
- CN202421745734.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-07-23
AI Technical Summary
In order to meet the creepage distance requirements, the distance between the battery string and the edge of the bus bar to the edge of the front or rear plate of the module must be maintained at more than 11mm, resulting in a reduction in the filling density of the battery string in the photovoltaic module and affecting the conversion efficiency.
The integrated packaging sleeve structure is adopted, and the whole of the battery string and the adhesive film is placed in the packaging sleeve, and the photovoltaic module body is formed through a hot pressing device. The bend of the packaging sleeve forms a sealing kit, reducing the creepage distance limitation and increasing the filling density of the battery string.
By reducing the blank area in the package, the battery string filling density is improved and the conversion efficiency of photovoltaic modules is enhanced.
Smart Images
Figure CN223110417U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaic modules, in particular to a novel photovoltaic module. Background Art
[0002] The composition of a photovoltaic module, excluding the module frame and junction box, can generally be divided into: front plate, encapsulant film, cell string, encapsulant film, and back plate from top to bottom. According to the standard of IEC61730, the distances between the photovoltaic module cells and the frame, and between the bus bars and the frame are restricted by the safety distance (creepage distance). The creepage distance is the shortest path measured along the insulating surface between two conductive components or between a conductive component and the equipment protection interface.
[0003] In order to meet the creepage distance requirements of existing photovoltaic modules, the distances from the edges of the cell string and the bus bars to the edges of the front plate or back plate material of the module should be maintained at more than 11 mm. Therefore, in this case, it is easy to cause a decrease in the filling density of the cell string in the photovoltaic module, which is likely to affect the conversion efficiency of the photovoltaic module itself. For this reason, we propose a novel photovoltaic module to solve the above-mentioned problems. Summary of the Utility Model
[0004] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Simplifications or omissions may be made in this part, as well as in the abstract and the title of the utility model, to avoid obscuring the purpose of this part, the abstract, and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the utility model.
[0005] Therefore, the purpose of the utility model is to provide a novel photovoltaic module that can solve the problem that in order to meet the creepage distance requirements of existing photovoltaic modules, the distances from the edges of the cell string and the bus bars to the edges of the front plate or back plate material of the module should be maintained at more than 11 mm. Therefore, in this case, it is easy to cause a decrease in the filling density of the cell string in the photovoltaic module, which is likely to affect the conversion efficiency of the photovoltaic module itself.
[0006] To solve the above technical problems, the utility model provides a novel photovoltaic module, adopting the following technical scheme: including a front plate, a back plate, and a cell string. It is characterized in that the front plate and the back plate form an integrated encapsulation sleeve, the top and bottom surfaces of the cell string are both provided with encapsulant films, and the whole formed by the cell string and the encapsulant films on its upper and lower surfaces is placed in the encapsulation sleeve and combined to form the main body of the photovoltaic module.
[0007] By adopting the above technical solution, in this solution, the encapsulation sleeve film and the battery string are first stacked on the encapsulation sleeve in sequence, and then one end of the encapsulation sleeve is bent to form a sealing kit to wrap the battery string. Then, the encapsulation sleeve and the battery string are laminated by a hot pressing device to form the main body of the photovoltaic module. Finally, the main body of the photovoltaic module is installed on the bracket for use.
[0008] Optionally, the bent part on one side of the encapsulation sleeve is hermetically connected.
[0009] Optionally, the encapsulation sleeve is made of a foldable soft film by folding.
[0010] Optionally, the encapsulation sleeve can also be manufactured by an integrally formed method.
[0011] Optionally, the bent parts on two sides or three sides of the encapsulation sleeve are hermetically connected.
[0012] Optionally, the edge distance between the edge of the battery string and the edge of the bent part of the encapsulation sleeve is less than 11 mm.
[0013] Optionally, both ends of the encapsulation sleeve are bent simultaneously, and after bending, one end is below the other end.
[0014] Optionally, both ends of the encapsulation sleeve are bonded with a sealant.
[0015] In summary, the present utility model includes at least one of the following beneficial effects:
[0016] There are no gaps at the edges of the sealing kit formed by folding. At this time, the battery string inside the encapsulation sleeve is not easily connected to the external conductor through the edge of the folding side of the encapsulation sleeve. Therefore, the edge distance from the edge of the battery string or the bus bar to the edge of the folding part of the encapsulation sleeve is not limited by the creepage distance greater than 11 mm. Thus, it can be close to the edge of the photovoltaic module, and the blank area inside the encapsulation sleeve is reduced, thereby increasing the filling density of the battery string and increasing the conversion efficiency of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0018] Figure 1 It is a three-dimensional unfolded structural schematic diagram of the encapsulation sleeve before folding in Embodiment 1 of the present utility model;
[0019] Figure 2 It is a partial three-dimensional structural schematic diagram of the encapsulation sleeve when folded in Embodiment 1 of the present utility model;
[0020] Figure 3 This is a partial three-dimensional structural schematic diagram of the two sides of the encapsulation sleeve in the second embodiment of the present utility model being closed;
[0021] Figure 4 This is a partial three-dimensional structural schematic diagram of the three sides of the encapsulation sleeve in the second embodiment of the present utility model being closed;
[0022] Figure 5 This is a three-dimensional structural schematic diagram of the third embodiment of the present utility model.
[0023] Explanation of reference numerals: 1, front plate; 2, back plate; 101, encapsulation sleeve; 102, battery string; 103, glue film; 3, main body of photovoltaic module. Specific embodiments
[0024] The following is a further detailed description of the present utility model in conjunction with the attached Figures 1-5 drawings.
[0025] In the first embodiment, referring to Figures 1-2 , in this embodiment, in order to solve the problem that in the existing photovoltaic module, in order to meet the creepage distance requirement, the distances from the edges of the battery string and the bus bar to the edges of the front plate or the back plate material of the module need to be kept above 11 mm. Therefore, in this case, it is easy to cause a reduction in the filling density of the battery string in the photovoltaic module, thus easily affecting the conversion efficiency of the photovoltaic module itself. The present utility model discloses a new type of photovoltaic module,
[0026] which includes a front plate 1, a back plate 2 and a battery string 102. It is characterized in that the front plate 1 and the back plate 2 form an integral encapsulation sleeve 101. Glue films 103 are provided on both the top surface and the bottom surface of the battery string 102. The encapsulation sleeve 101 is folded from a foldable soft film. And the whole formed by the battery string 102 and the glue films 103 on its upper and lower surfaces is placed in the encapsulation sleeve 101 formed by the foldable soft film, and a main body 3 of the photovoltaic module is formed in combination. One bending part of the encapsulation sleeve 101 is connected in a sealed manner.
[0027] The distance from the edge of the battery string 102 to the edge of the bending part of the encapsulation sleeve 101 is less than 11 mm; the encapsulation sleeve 101 is an ultra-thin flexible glass plate, ETFE, PVDF, or soft glass. ETFE generally refers to ethylene-tetrafluoroethylene copolymer, and PVDF generally refers to polyvinylidene fluoride. One end of the encapsulation sleeve 101 is bent to form a sealing sleeve, and one side of the sealing sleeve is connected in a sealed manner. The glue film 103 is an EVA board or a POE board. The ultra-thin flexible glass plate has flexibility and can be folded, and there are no gaps at the edges of the sealing kit formed after folding. At this time, the battery string 102 in the encapsulation sleeve 101 is not easily connected to an external conductor through the edge of the folding side of the encapsulation sleeve 101. Therefore, the distances from the edge of the battery string 102 or the edge of the bus bar to the edge of the folding part of the encapsulation sleeve 101 are not restricted by the creepage distance greater than 11 mm.
[0028] The specific working principle is as follows: First, stack the encapsulation sleeve 101, the adhesive film 103, and the battery string 102 on the encapsulation sleeve 101 in sequence. Then, bend one end of the encapsulation sleeve 101 to form a sealing sleeve to wrap the battery string 102. Next, use a hot pressing device to perform lamination on the encapsulation sleeve 101 and the battery string 102 to form the main body 3 of the photovoltaic module.
[0029] Embodiment 2, referring to Figures 3-4 , based on the same concept as the above embodiment, this new type of photovoltaic module further includes:
[0030] The encapsulation sleeve 101 can also be manufactured by an integral molding method. The bending parts on two sides or three sides of the encapsulation sleeve 101 are hermetically connected. The front plate 1 and the back plate 2 are integrally processed and formed directly by equipment. At this time, the front plate 1 and the back plate 2 form a sealing sleeve. Then, the battery string 102 and the adhesive film 103 are placed into the sealing sleeve. Immediately, use a hot pressing device to perform lamination on it. The bending parts on two sides or three sides of the front plate 1 and the back plate 2 of the integrally formed encapsulation sleeve 101 have no gaps.
[0031] Embodiment 3, referring to Figure 5 , based on the same concept as the above two embodiments, this new type of photovoltaic module further includes:
[0032] Both ends of the encapsulation sleeve 101 are bent simultaneously, and after bending, one end is below the other end. The overlapping part of the two ends of the encapsulation sleeve 101 has a certain length, which can extend the creepage distance while ensuring the sealing effect. The two ends of the encapsulation sleeve 101 are bonded with a sealing glue, and the sealing glue is used to increase the sealing performance when the two ends of the encapsulation sleeve 101 are connected. Moreover, the bending parts on both sides of the encapsulation sleeve 101 are hermetically connected.
[0033] The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.
Claims
1. A novel photovoltaic module, comprising a front plate (1), a back plate (2) and a battery string (102), characterized in that, The front plate (1) and the back plate (2) form an encapsulation sleeve (101) as a whole. Glue films (103) are provided on both the top surface and the bottom surface of the battery string (102), and the whole formed by the battery string (102) and the glue films (103) on its upper and lower surfaces is placed in the encapsulation sleeve (101) and combined to form the main body (3) of the photovoltaic module.
2. The novel photovoltaic module according to claim 1, wherein: The encapsulation sleeve (101) is formed by folding a foldable soft film.
3. The novel photovoltaic module according to claim 2, wherein: One side of the encapsulation sleeve (101) at the bending part is hermetically connected.
4. The novel photovoltaic module according to claim 1, characterized in that: The encapsulation sleeve (101) can also be manufactured by an integral molding method.
5. The novel photovoltaic module according to claim 4, wherein: The bending parts on two sides or three sides of the encapsulation sleeve (101) are hermetically connected.
6. The novel photovoltaic module according to claim 1, wherein: The edge distance between the edge of the battery string (102) and the edge of the bending part of the encapsulation sleeve (101) is less than 11 mm.
7. The novel photovoltaic module according to claim 1, characterized in that: Both ends of the encapsulation sleeve (101) are bent simultaneously, and after bending, one end is below the other end.
8. The novel photovoltaic module according to claim 7, wherein: Both ends of the encapsulation sleeve (101) are bonded by a sealant.