Photovoltaic module and photovoltaic system
By setting up a boss filling gap on the surface of the carrier film, the problem of pits on the back panel during the lamination of photovoltaic modules is solved, which reduces the risk of hidden cracks or lobes, improves the yield rate, and reduces the cost.
Patent Information
- Application Number
- CN202421810644.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-29
AI Technical Summary
During the lamination of photovoltaic modules, pits are easily generated on the back panel surface, resulting in an increased risk of hidden cracks or lobes, and the existing improvement solutions are costly and ineffective.
By setting a boss on the surface of the carrier film, the gap between the cells is filled, the formation of pits on the back plate surface is avoided, and a carrier film with low fluidity is used to ensure uniform stress during the lamination process.
It effectively avoids the occurrence of pits on the back panel surface, reduces the risk of hidden cracks or lobes, improves the yield rate of photovoltaic modules, and reduces costs.
Smart Images
Figure CN222869310U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of solar cells, in particular to a photovoltaic component and a photovoltaic system. Background Art
[0002] In the application scenarios of distributed photovoltaic modules, for some scenarios with requirements on load, lightweight single-glass modules are mainly selected. Among the latest industry technologies, busbar-free technology is popular in foreign markets such as Europe because it has no grid lines blocking the front of the module. The photovoltaic module has high power and is more beautiful. Faced with a vast market, the requirements for the power generation and appearance of the modules are getting higher and higher.
[0003] In the application of conventional single-glass modules, the back panel surface usually has a certain degree of bumps and concavities after lamination. This is also due to the soft back panel and the limited fluidity of the adhesive film, which is a common problem of single-glass products. The reason for the pits on the back panel of single-glass modules is that the lamination process of the module cannot fill the area between the battery strings well. The formation of the pits will cause excessive pressure on the edge area of the module, which is prone to hidden cracks or splinters. At the same time, pits will also appear on the outside of the back panel, affecting the appearance of the module.
[0004] In the prior art, the problem can usually be improved by increasing the weight of the adhesive film and the hardness of the back sheet, but the above improvement solutions not only increase the cost significantly, but also have little effect. Therefore, how to provide a photovoltaic module that can avoid pits on the back sheet surface during the lamination process and has a lower risk of hidden cracks or splits is a problem that technicians in this field need to solve urgently. Utility Model Content
[0005] The purpose of the utility model is to provide a photovoltaic module, the back panel surface of which will not have pits and the risk of hidden cracks or splits is low; another purpose of the utility model is to provide a photovoltaic system, the back panel surface of which will not have pits and the risk of hidden cracks or splits is low.
[0006] In order to solve the above technical problems, the utility model provides a photovoltaic module, including a battery sheet, a welding strip and a carrier film;
[0007] A plurality of the solar cells are laid on the inner layer of the photovoltaic module, the carrier film includes a central area corresponding to the surface of the solar cell and an edge area corresponding to the gap outside the solar cell, and the welding strip is pre-fixed to the surface of the solar cell through the central area of the carrier film;
[0008] The edge region of the carrier film is provided with a boss which fills the gap.
[0009] Optionally, the boss and the carrier film are an integrated structure.
[0010] Optionally, one carrier film corresponds to a plurality of battery cells, the carrier film has a plurality of central regions, one central region corresponds to one battery cell, and bosses are formed between adjacent central regions.
[0011] Optionally, the cell is an IBC cell, and the carrier film is arranged on the back side of the IBC cell.
[0012] Optionally, the thickness of the carrier film in the edge region ranges from 250 μm to 350 μm.
[0013] Optionally, welding strips are provided on the front and back of the cell, and a plurality of the cell forms a cell string and is laid on the inner layer of the photovoltaic module;
[0014] The carrier film is disposed on at least one side surface of the battery string to fix the welding strip on the corresponding side of the battery string.
[0015] Optionally, the carrier film is disposed on the front and back sides of the battery string, and the top surfaces of the bosses of the carrier film located on both sides of the battery string abut against each other in the gap.
[0016] Optionally, in the carrier film located on both sides of the battery string, the sum of the thicknesses of the edge regions ranges from 250 μm to 350 μm.
[0017] Optionally, a groove for accommodating the welding strip is provided in a central area of the carrier film, and the welding strip is embedded in the groove and fixedly connected to the carrier film.
[0018] The present application also provides a photovoltaic system, comprising any photovoltaic assembly as described above.
[0019] The utility model provides a photovoltaic module, including a battery cell, a welding strip and a carrier film; a plurality of battery cells are laid on the inner layer of the photovoltaic module, the carrier film includes a central area corresponding to the surface of the battery cell and an edge area corresponding to the gap outside the battery cell, the welding strip is pre-fixed on the surface of the battery cell through the central area of the carrier film; the edge area of the carrier film is provided with a boss, and the boss fills the gap.
[0020] By setting bosses on the surface of the carrier film and filling the gaps between the cells with the bosses, pits on the backplane surface can be avoided during the lamination process. At the same time, since the gaps are filled with a carrier film with low fluidity, the force on the components during the lamination process can be uniform, thereby reducing the risk of hidden cracks or splits and ensuring a high yield rate for the components.
[0021] The utility model also provides a photovoltaic system, which also has the above-mentioned beneficial effects, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 A schematic diagram of the structure of a photovoltaic module provided by an embodiment of the utility model;
[0024] Figure 2 A schematic diagram of the structure of another photovoltaic module provided by an embodiment of the utility model;
[0025] Figure 3 A schematic diagram of the structure of another photovoltaic module provided by an embodiment of the utility model;
[0026] Figure 4 for Figure 3 Schematic diagram of the structure of the carrier membrane.
[0027] In the figure: 1. battery cell, 2. solder strip, 3. carrier film, 31. boss, 32. groove, 4. front packaging film, 5. back packaging film, 6. front plate, 7. back plate. DETAILED DESCRIPTION
[0028] The core of the utility model is to provide a photovoltaic module. In the prior art, it can usually be improved by increasing the weight of the film and the hardness of the back sheet, but the above improvement schemes not only increase the cost significantly, but also have little effect.
[0029] The utility model provides a photovoltaic module, including a cell, a welding strip and a carrier film; a plurality of cells are laid on the inner layer of the photovoltaic module, the carrier film includes a central area corresponding to the surface of the cell and an edge area corresponding to the gap outside the cell, the welding strip is pre-fixed to the surface of the cell through the central area of the carrier film; the edge area of the carrier film is provided with a boss, and the boss fills the gap.
[0030] By setting bosses on the surface of the carrier film and filling the gaps between the cells with the bosses, pits on the backplane surface can be avoided during the lamination process. At the same time, since the gaps are filled with a carrier film with low fluidity, the force on the components during the lamination process can be uniform, thereby reducing the risk of hidden cracks or splits and ensuring a high yield rate for the components.
[0031] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.
[0032] Embodiment 1
[0033] Please refer to Figure 1 , Figure 1 A schematic structural diagram of a photovoltaic module provided in an embodiment of the utility model.
[0034] See also Figure 1 In an embodiment of the utility model, a photovoltaic module includes a cell 1, a welding ribbon 2 and a carrier film 3; a plurality of the cell 1 are laid on the inner layer of the photovoltaic module, the carrier film 3 includes a central area corresponding to the surface of the cell 1 and an edge area corresponding to the outer gap of the cell 1, the welding ribbon 2 is pre-fixed to the surface of the cell 1 through the central area of the carrier film 3; a boss 31 is provided at the edge area of the carrier film 3, and the boss 31 fills the gap.
[0035] The above-mentioned cell 1 can be an IBC (Interdigitated back contact) cell 1, that is, a cell 1 with no grid lines on the front and grid lines on the back; it can also be a traditional cell 1 with grid lines and welding strips 2 on both sides. The specific structure of the cell 1 can refer to the prior art and will not be described here. In this embodiment, the inner layer of the photovoltaic module is usually paved with multiple cells 1, so there is a gap on the outside of the cell 1 in this embodiment, and the gap usually exists between adjacent cells 1 and between the cell 1 and the edge of the photovoltaic module.
[0036] The above-mentioned welding tape 2 will be fixed on the surface of the battery cell 1 to transfer current. In this embodiment, the welding tape 2 is pre-fixed on the surface of the battery cell 1 through the carrier film 3. That is, when the welding tape 2 is set in this embodiment, the welding tape 2 will be pre-fixed on the surface of the battery cell 1 with the carrier film 3 to ensure that the welding tape 2 is in good contact with the battery cell 1. Correspondingly, in this embodiment, the carrier film 3 is usually a low-fluidity adhesive film to ensure that the welding tape 2 can be pre-fixed on the surface of the battery cell 1. The above-mentioned carrier film 3 is usually a low-fluidity film layer prepared in advance by a process such as injection molding or a similar process, rather than a high-fluidity adhesive film prepared by printing and then curing in the photovoltaic module. In this embodiment, the above-mentioned welding tape 2 is usually a low-temperature welding tape 2. The specific structure of the welding tape 2 can refer to the prior art and will not be repeated here.
[0037] In this embodiment, the carrier film 3 is divided into a central area and an edge area, wherein the central area corresponds to the surface of the cell 1, and the edge area corresponds to the above-mentioned gap. In this embodiment, a boss 31 is formed in the edge area of the carrier film 3, and the boss 31 needs to be able to extend to the side of the cell 1, so that the boss 31 can extend to the gap outside the above-mentioned cell 1 and fill the gap to reduce the unevenness of the photovoltaic module.
[0038] In this embodiment, the boss 31 is preferably an integrated structure with the carrier film 3. Specifically, the boss 31 can be a raised inner cavity at the position corresponding to the edge area by adjusting the mold during injection molding of the carrier film 3, so that the carrier film 3 with an integrated boss is directly formed after injection molding. Of course, in this embodiment, the specific preparation process of the carrier film 3 is not specifically limited, and it depends on the specific situation.
[0039] Specifically, in this embodiment, one carrier film 3 usually corresponds to a plurality of cells 1, and the carrier film 3 has a plurality of central areas, one central area corresponds to one cell 1, and the bosses 31 are formed between the adjacent central areas. That is, in this embodiment, one carrier film 3 can be responsible for not only pre-fixing the solder strip 2 on the surface of one cell 1, but also pre-fixing the solder strips 2 on the surfaces of multiple cells 1. Correspondingly, a plurality of the central areas need to be divided in the carrier film 3, and the central areas are usually in a one-to-one correspondence with the cells 1. Obviously, in the carrier film 3 of this structure, the bosses 31 need to be formed between the adjacent central areas so that after the carrier film 3 is attached, the bosses 31 fill the gaps between the cells 1. Of course, corresponding bosses 31 can also be formed on the surface of the carrier film 3 to fill the gaps between the cells 1 and the edges of the photovoltaic module to reduce the unevenness of the photovoltaic module.
[0040] It should be emphasized that in this embodiment, the boss 31 is usually only provided on the surface of the carrier film 3 facing the battery cell 1 , while the boss 31 is not provided on the surface of the carrier film 3 facing away from the battery cell 1 .
[0041] In this embodiment, the photovoltaic module generally further includes a front plate 6, a front encapsulation film 4, a back encapsulation film 5 and a back plate 7, wherein the front plate 6 is generally glass and is disposed on the front of the cell 1; the back plate 7 is generally a metal plate and is disposed on the back of the cell 1. When a carrier film 3 is disposed on the front of the cell 1, the front encapsulation film 4 is disposed between the carrier film 3 and the front plate 6; when no carrier film 3 is disposed on the front of the cell 1, the front encapsulation film 4 is disposed between the cell 1 and the front plate 6; when a carrier film 3 is disposed on the back of the cell 1, the back encapsulation film 5 is disposed between the carrier film 3 and the front plate 6; when the carrier film 3 is disposed on the back of the cell 1, the back encapsulation film 5 is disposed between the carrier film 3 and the front plate 6; when the carrier film 3 has sufficient viscosity, the corresponding front encapsulation film 4 and / or back encapsulation film 5 may not be disposed.
[0042] The photovoltaic module provided in this embodiment can avoid pits on the surface of the back sheet 7 during the lamination process by providing a boss 31 on the surface of the carrier film 3 so that the boss 31 provided on the carrier film 3 fills the gap between the cells 1. At the same time, since the gap is filled with a carrier film 3 with low fluidity, it can ensure that the force on the module is uniform during the lamination process, thereby reducing the risk of hidden cracks or splits and ensuring that the module has a high yield rate.
[0043] The specific structure of a photovoltaic module provided by the utility model will be described in detail in the following utility model embodiments.
[0044] Embodiment 2
[0045] Different from the above utility model embodiment, the utility model embodiment further defines the structure of the carrier film 3 on the basis of the above utility model embodiment. The rest of the contents have been described in detail in the above utility model embodiment and will not be repeated here.
[0046] See also Figure 1 In this embodiment, the cell 1 is an IBC cell 1, the carrier film 3 is disposed on the back side of the IBC cell 1, and the boss 31 extends from one side of the back side of the IBC cell 1 to the gap.
[0047] In this embodiment, the cell 1 is specifically an IBC cell 1 with a solder strip 2 connected only on the back, and the corresponding carrier film 3 is also only arranged on the back of the cell 1 and not on the front of the cell 1. In this embodiment, the carrier film 3 is used to pre-fix the solder strip 2, so the front of the cell 1 is not provided with the carrier film 3 but directly contacts the packaging film. Since the carrier film 3 is only arranged on the back of the cell 1 in this embodiment, the boss 31 only extends from the back of the cell 1 to the gap outside the cell 1. In this embodiment, the thickness of the carrier film 3 in the edge area ranges from 250μm to 350μm. The thickness of the carrier film 3 in the center area is usually in the range of about 100μm to ensure that the boss 31 can extend to the above gap and fill the entire gap as much as possible.
[0048] Preferably, in the present embodiment, the upper surface of the boss 31 is flush with the front surface of the IBC cell 1. At this time, the carrier film 3 provided on the back of the IBC cell 1 can make the surface of the bonding structure between the cell 1 and the carrier film 3 in the module as smooth as possible, thereby minimizing the risk of hidden cracks in the photovoltaic module and ensuring the flatness of the surface of the back panel 7 after lamination.
[0049] The photovoltaic module provided in this embodiment can avoid pits on the surface of the back sheet 7 during the lamination process by providing a boss 31 on the surface of the carrier film 3 so that the boss 31 provided on the carrier film 3 fills the gap between the cells 1. At the same time, since the gap is filled with a carrier film 3 with low fluidity, it can ensure that the force on the module is uniform during the lamination process, thereby reducing the risk of hidden cracks or splits and ensuring that the module has a high yield rate.
[0050] The specific structure of a photovoltaic module provided by the utility model will be described in detail in the following utility model embodiments.
[0051] Embodiment 3
[0052] Please refer to Figure 2 , Figure 2 A schematic diagram of the structure of another photovoltaic module provided in an embodiment of the utility model.
[0053] Different from the above utility model embodiment, the utility model embodiment further defines the structure of the carrier film 3 on the basis of the above utility model embodiment. The rest of the contents have been described in detail in the above utility model embodiment and will not be repeated here.
[0054] See also Figure 2 In this embodiment, welding strips 2 are provided on the front and back sides of the battery cell 1, and a plurality of the battery cells 1 form a battery string laid on the inner layer of the photovoltaic module; the carrier film 3 is provided on at least one side surface of the battery string to fix the welding strip 2 on the corresponding side of the battery string.
[0055] In the present embodiment, the battery cell 1 is specifically a traditional battery cell 1 having welding strips 2 on both the front and back sides of the battery cell 1. In the present embodiment, at least one side of the welding strip 2 on the front and back sides of the battery cell 1 is pre-fixed by the above-mentioned carrier film 3 with the boss 31. In the present embodiment, the battery cell 1 will form a battery string and be laid in the photovoltaic module in the form of a battery string. Therefore, in the present embodiment, the front and / or back side of the battery string is provided with the above-mentioned carrier film 3 with the boss 31, that is, at least one side of the welding strip 2 of the battery string is pre-fixed by the above-mentioned carrier film 3 with the boss 31.
[0056] In the present embodiment, the opposite ends of adjacent battery cells 1 in the battery string may or may not overlap. When the adjacent battery cells 1 in the battery string do not overlap, the above-mentioned gap may exist between the adjacent battery cells, and the corresponding carrier film 3 disposed on the surface of one side of the battery string needs to be provided with a corresponding boss 31 corresponding to the above-mentioned gap; when the opposite ends of adjacent battery cells 1 in the battery string overlap, the above-mentioned gap does not exist between adjacent battery cells in the same battery string, but the above-mentioned gap still exists between adjacent battery strings and on the outside of the battery string, and the gap is also located on the outside of the battery cell, and the corresponding carrier film 3 disposed on the surface of one side of the battery string needs to be provided with a corresponding boss 31 corresponding to the above-mentioned gap, and the boss 31 of the carrier film 3 needs to fill the above-mentioned gap.
[0057] Specifically, in the present embodiment, the front and back sides of the battery string may be provided with the above-mentioned carrier film 3 with the bosses 31. At this time, for a gap, the bosses 31 of the carrier film 3 located on both sides of the battery string will fill the gap. At this time, the top surfaces of the bosses 31 of the carrier film 3 located on both sides of the battery string will be offset in the gap, that is, one gap is filled by the bosses 31 of two carrier films 3, and the two carrier films 3 are respectively located on both sides of the battery cell 1.
[0058] In this embodiment, in the carrier film 3 located on both sides of the battery string, the sum of the thickness of the edge areas ranges from 250μm to 350μm. That is, when the carrier films 3 with bosses 31 are provided on both opposite sides of the battery string, the sum of the thickness of the edge areas of the two carrier films 3 with bosses 31 ranges from 250μm to 350μm. Of course, in this embodiment, the carrier film 3 with bosses 31 can be provided only on one side of the battery string, and an ordinary carrier film 3 without bosses 31 can be provided on the other side of the battery string, or a packaging film can be provided directly without the carrier film 3, depending on the specific situation, and no specific limitation is made here.
[0059] The photovoltaic module provided in this embodiment can avoid pits on the surface of the back sheet 7 during the lamination process by providing a boss 31 on the surface of the carrier film 3 so that the boss 31 provided on the carrier film 3 fills the gap. At the same time, since the gap is filled with a carrier film 3 with low fluidity, it can ensure that the module is evenly stressed during the lamination process, thereby reducing the risk of hidden cracks or splits and ensuring that the module has a high yield rate.
[0060] The specific structure of a photovoltaic module provided by the utility model will be described in detail in the following utility model embodiments.
[0061] Embodiment 4
[0062] Please refer to Figure 3 as well as Figure 4, Figure 3 A schematic diagram of the structure of another photovoltaic module provided by an embodiment of the utility model; Figure 4 for Figure 3 Schematic diagram of the structure of the carrier membrane.
[0063] Different from the above utility model embodiment, the utility model embodiment further defines the structure of the carrier film 3 on the basis of the above utility model embodiment. The rest of the contents have been described in detail in the above utility model embodiment and will not be repeated here.
[0064] See also Figure 3 as well as Figure 4 In this embodiment, a groove 32 for accommodating the welding strip 2 is provided in the central area of the carrier film 3 , and the welding strip 2 is embedded in the groove 32 and fixedly connected to the carrier film 3 .
[0065] The carrier film 3 of this embodiment not only forms a boss 31 in the edge area, but also can further set a groove 32 in the central area of the surface of the corresponding battery cell 1. The shape of the groove 32 needs to correspond to the welding strip 2. The groove 32 is specifically used to accommodate the welding strip 2. The welding strip 2 can be embedded in the groove 32 and fixedly connected with the carrier film 3, so that the carrier film 3 can pre-fix the welding strip 2 on the surface of the battery cell 1. Since the shape of the above-mentioned groove 32 needs to correspond to the welding strip 2, the groove 32 is usually in the shape of a long strip. It should be noted that in this embodiment, the depth of the above-mentioned groove 32 usually needs to be less than the thickness of the welding strip 2, that is, the welding strip 2 will protrude from the groove 32 after being embedded in the groove 32, so as to facilitate the connection between the welding strip 2 and the battery cell 1. The setting of the above-mentioned groove 32 can not only be used to fix the welding strip 2, but also can further reduce the influence of the thickness of the welding strip 2 on the flatness of the photovoltaic module, thereby further improving the flatness inside the module, thereby ensuring that the module is evenly stressed during the lamination process, thereby reducing the risk of hidden cracks or splits, and ensuring that the module has a high yield rate.
[0066] Embodiment 5
[0067] A photovoltaic system provided by an embodiment of the present utility model is introduced below. The photovoltaic system described below and the photovoltaic assembly described above can be referred to each other.
[0068] In this embodiment, the photovoltaic system includes the photovoltaic assembly described in any of the above embodiments. The specific structure of the photovoltaic assembly has been described in detail in the above utility model embodiments, and will not be repeated here. The remaining structures of the photovoltaic system, such as cables, etc., can refer to the prior art, and will not be repeated here.
[0069] Since the photovoltaic system provided in this embodiment specifically uses the photovoltaic components provided in the above embodiments, the photovoltaic system has a better appearance and lower cost due to a high yield rate.
[0070] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0071] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.
[0072] The above is a detailed introduction to a photovoltaic module and photovoltaic system provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.
Claims
1. A photovoltaic module, characterized in that: Including battery cells, solder strips and carrier films; A plurality of the solar cells are laid on the inner layer of the photovoltaic module, the carrier film includes a central area corresponding to the surface of the solar cell and an edge area corresponding to the gap outside the solar cell, and the welding strip is pre-fixed to the surface of the solar cell through the central area of the carrier film; The edge region of the carrier film is provided with a boss which fills the gap.
2. The photovoltaic module according to claim 1, characterized in that: The boss and the carrier film are an integrated structure.
3. The photovoltaic module according to claim 1, characterized in that: One carrier film corresponds to a plurality of battery cells. The carrier film has a plurality of central regions, one central region corresponds to one battery cell, and bosses are formed between adjacent central regions.
4. The photovoltaic module according to claim 1, characterized in that: The cell is an IBC cell, and the carrier film is arranged on the back of the IBC cell.
5. The photovoltaic module according to any one of claims 1 to 4, characterized in that: The thickness of the carrier film in the edge region ranges from 250 μm to 350 μm.
6. The photovoltaic module according to claim 1, characterized in that: The front and back sides of the cell are both provided with welding strips, and a plurality of the cell sheets form a cell string and are laid on the inner layer of the photovoltaic module; The carrier film is disposed on at least one side surface of the battery string to fix the welding strip on the corresponding side of the battery string.
7. The photovoltaic module according to claim 6, characterized in that: The carrier film is disposed on the front and back sides of the battery string, and the top surfaces of the bosses of the carrier film located on both sides of the battery string abut against each other in the gap.
8. The photovoltaic module according to claim 7, characterized in that: In the carrier film located on both sides of the battery string, the sum of the thicknesses of the edge regions ranges from 250 μm to 350 μm.
9. The photovoltaic module according to claim 1, characterized in that: The central area of the carrier film is provided with a groove for accommodating the welding strip, and the welding strip is embedded in the groove and fixedly connected to the carrier film.
10. A photovoltaic system, characterized in that: The invention comprises a photovoltaic module as claimed in any one of claims 1 to 9.