Frame structure and photovoltaic module

Abstract

The utility model provides a frame structure and a photovoltaic assembly, relates to the field of photovoltaic technology, and aims to solve the problem that a conventional handle plate is easy to break due to large non-deformability difference in different directions. The frame structure is applied to the photovoltaic module, the photovoltaic module comprises a battery layer, and the frame structure comprises at least one supporting plate; the lifting handle plate is connected with the supporting plates, the lifting handle plate and at least one supporting plate define an installation space, the battery layer is arranged in the installation space, and a hollow area is arranged on the lifting handle plate; wherein the handle plate comprises a composite plate containing a glass fiber mesh. According to the frame structure, the tensile strength of the lifting handle plate in the length direction and the tensile strength of the lifting handle plate in the width direction are the same or almost the same, the non-deformability of the lifting handle plate in different directions is small in difference, and therefore the problem that the lifting handle plate is broken is avoided.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and more specifically, to a frame structure and a photovoltaic module. Background Technology

[0002] The frame structure is formed by a handle panel and a support panel. The conventional handle panel is made of polyurethane fiberglass board. Polyurethane fiberglass board has strong resistance to deformation in the direction of wire drawing, but weak resistance to deformation perpendicular to the direction of wire drawing. Because there are too many hollow areas in the handle panel, when the frame structure falls off, the conventional handle panel is prone to breakage under external force due to the large difference in resistance to deformation in different directions. Utility Model Content

[0003] The present invention aims to at least solve the problem in the related technology that "conventional handles are prone to breakage due to the large difference in their resistance to deformation in different directions".

[0004] Therefore, the first aspect of this utility model provides a frame structure for use in photovoltaic modules. The photovoltaic module includes a battery layer, and the frame structure includes: at least one support plate; a handle plate connected to the support plate, the handle plate and at least one support plate enclosing an installation space, the battery layer being disposed in the installation space, and the handle plate having a hollow area; wherein, the handle plate includes a composite plate containing a glass fiber mesh.

[0005] The frame structure provided by this utility model is applied to photovoltaic modules. The photovoltaic module includes a battery layer, and the frame structure includes at least one support plate and a handle plate. At least one support plate is connected to another support plate, and the handle plate and at least one support plate enclose an installation space. The battery layer is disposed in the installation space, and the handle plate has a hollow area. The handle plate includes a composite plate containing a glass fiber mesh. Because the glass fiber mesh is mesh-like, it is equivalent to bidirectional wire drawing, which makes the deformation resistance of the handle plate almost the same in different directions, thereby avoiding the problem of handle plate breakage. That is, the tensile strength of the handle plate is the same or almost the same in the length and width directions, so the difference in deformation resistance in different directions is small, thereby avoiding the problem of handle plate breakage. It should be noted that the tensile strength of the handle plate being the same or almost the same in the length and width directions means that the difference in tensile strength between the length and width directions is less than a preset value, for example, less than 10 MPa. The length direction and width direction refer to the length direction and width direction of the handle plate, respectively.

[0006] Optionally, in the above technical solution, the frame structure also includes a handle, which is provided on the handle plate, so that the user can unfold or overlap the photovoltaic module by holding the handle.

[0007] Optionally, in the above technical solution, the handle panel includes a fiberglass mesh-epoxy resin composite board.

[0008] In this technical solution, the handle plate can be formed by bonding glass fiber mesh (glass fiber cloth) with epoxy resin, thereby ensuring that the handle plate has consistent strength in different directions.

[0009] In the above technical solution, optionally, the support plate includes a polyester fiberglass board. Alternatively, the support plate includes a polyurethane fiberglass board. Polyurethane fiberglass boards can effectively solve the problem of deformation caused by long-term outdoor exposure. Furthermore, because polyurethane fiberglass boards have strong resistance to bending deformation along their length, they can effectively solve the problem of product thermal deformation when used as a support plate.

[0010] In the above technical solution, optionally, the thickness of the handle plate is greater than or equal to 1 mm and less than or equal to 2 mm. Alternatively, the thickness of the handle plate is 1 mm or 2 mm.

[0011] In the above technical solution, optionally, the thickness of the support plate is greater than or equal to 2mm and less than or equal to 3mm. Alternatively, the thickness of the support plate is 2mm or 3mm.

[0012] In the above technical solution, optionally, the width of the support plate is greater than or equal to 15mm and less than or equal to 17mm. Alternatively, the width of the support plate is 15mm or 16mm.

[0013] In the above technical solution, optionally, the number of support plates is three. The shape of the frame structure is square. That is, the three support plates and one handle plate form a square structure, thereby wrapping the battery layer inside and protecting it.

[0014] The second aspect of this utility model provides a photovoltaic module, including: a frame structure according to any of the technical solutions of the first aspect of this application; and a battery layer disposed in the installation space.

[0015] Optionally, in the above technical solution, the photovoltaic module further includes: a light-receiving layer; a front support layer disposed on one side of the light-receiving layer; a rear support layer disposed on the side of the front support layer away from the light-receiving layer, and a frame structure disposed between the front support layer and the rear support layer; and a backlight layer disposed on the side of the rear support layer away from the front support layer.

[0016] In this embodiment, the photovoltaic module, from top to bottom, includes a light-receiving layer, a front support layer, a battery layer, a rear support layer, and a backlight layer. The frame structure of this invention surrounds the outside of the battery layer, providing good support. The light-receiving layer primarily serves to resist ultraviolet radiation and weathering. The front and rear support layers enhance the impact resistance of both sides of the battery layer while minimizing light obstruction. Furthermore, it should be noted that the photovoltaic module of this application can be used on both sides; that is, the light-receiving layer and the backlight layer are the same layer. When the light-receiving layer faces the sunlight, it receives sunlight; conversely, when the backlight layer faces the sunlight, it receives sunlight.

[0017] Optionally, in the above technical solution, the photovoltaic module further includes: a first adhesive layer disposed between the light-receiving layer and the front support layer; a second adhesive layer disposed between the front support layer and the cell layer; a third adhesive layer disposed between the cell layer and the rear support layer; and a fourth adhesive layer disposed between the rear support layer and the backlight layer.

[0018] In this embodiment, by setting an adhesive layer between the light-receiving layer, the front support layer, the battery layer, the rear support layer and the backlight layer, the overall stability of the photovoltaic module can be improved.

[0019] In the above technical solution, optionally, the light-receiving layer includes a PVDF (Polyvinylidene Fluoride) layer and / or an ETFE (Ethylene Tetrafluoroethylene) layer.

[0020] In this embodiment, both PVDF and ETFE boards have excellent weather resistance, corrosion resistance, and chemical stability, thus providing good protection during the installation of photovoltaic modules. They can effectively prevent photovoltaic modules from being affected by environmental factors such as ultraviolet radiation, rain, and temperature changes, thereby improving the service life and performance of photovoltaic modules.

[0021] In the above technical solution, optionally, the front support layer includes a PET (Polyethylene Terephthalate) layer.

[0022] In this embodiment, PET possesses excellent physical and mechanical properties, chemical resistance, optical properties, and electrical properties, thus making it suitable as a front support layer for photovoltaic modules. PET has high light transmittance, effectively transmitting sunlight and improving the power generation efficiency of photovoltaic modules. Furthermore, PET has good weather resistance, allowing it to be used in harsh environmental conditions and extending the lifespan of photovoltaic modules.

[0023] In the above technical solution, optionally, the number of front support layers is greater than or equal to two. For example, it can be two or three layers.

[0024] In the above technical solution, optionally, the transparency of the front support layer is greater than or equal to 95%. Alternatively, the transparency of the front support layer is greater than or equal to 99%, thereby ensuring power generation efficiency.

[0025] In the above technical solutions, optionally, the battery layer includes one or a combination of the following: IBC (Interdigitated Back Contact) battery layer, TOPcon (Tunnel Oxide Passivated Contact) battery layer, PERC (Passivated Emitter Rear Contact) battery layer, and HJT (Heterojunction) battery layer.

[0026] In this embodiment, the IBC battery layer, TOPcon battery layer, PERC battery layer and HJT battery layer all have long photoelectric conversion lifetime and low power decay. The batteries are laser-cut half-pieces or multiple pieces to meet the requirements of series voltage and anti-hot spot effect.

[0027] In the above technical solution, optionally, the gap between the battery layer and the frame structure is greater than or equal to 3mm.

[0028] In this embodiment, a certain gap is provided between the battery layer and the frame structure. This allows the frame structure to have a certain displacement buffer when subjected to external force, thereby preventing the battery layer from being scratched and damaged. However, the gap should not be too large, and optionally, it should be less than or equal to 5mm.

[0029] In the above technical solution, optionally, the back support layer includes a PET layer.

[0030] In this embodiment, PET possesses excellent physical and mechanical properties, chemical resistance, optical properties, and electrical properties, thus making it suitable as a back support layer for photovoltaic modules. PET has high light transmittance, effectively transmitting sunlight and improving the power generation efficiency of photovoltaic modules. Furthermore, PET has good weather resistance, allowing it to be used in harsh environmental conditions and extending the lifespan of photovoltaic modules.

[0031] In the above technical solution, the backlight layer optionally includes a PVDF layer and / or an ETFE layer.

[0032] In this embodiment, both PVDF and ETFE boards have excellent weather resistance, corrosion resistance, and chemical stability, thus providing good protection during the installation of photovoltaic modules. They can effectively prevent photovoltaic modules from being affected by environmental factors such as ultraviolet radiation, rain, and temperature changes, thereby improving the service life and performance of photovoltaic modules.

[0033] In the above technical solution, optionally, the total thickness of the third adhesive layer, the rear support layer, and the fourth adhesive layer is greater than or equal to 1 mm and less than or equal to 2 mm. Optionally, 1 mm or 2 mm.

[0034] In the above technical solution, optionally, the total thickness of the photovoltaic module is greater than or equal to 4.5mm and less than or equal to 5.5mm. Optionally, 4.5mm, 5mm, or 5.5mm.

[0035] In the above technical solution, optionally, the first adhesive layer, the second adhesive layer, the third adhesive layer and the fourth adhesive layer all include an EVA (Ethylene Vinyl Acetate) adhesive layer and / or a POE (Polyolefin Elastomer) adhesive layer.

[0036] In this embodiment, both the EVA layer and the POE layer have excellent connectivity, which improves the overall stability of the photovoltaic module.

[0037] In the above technical solution, optionally, the number of frame structures is two, and the photovoltaic module also includes multiple intermediate frames, which are located between the two frame structures. A battery layer is provided inside any intermediate frame, and any two adjacent intermediate frames are riveted together, and any two adjacent intermediate frames are riveted together with the frame structure.

[0038] In this embodiment, multiple intermediate frames are positioned between two frame structures to form the framework of the entire battery layer. Any two adjacent intermediate frames are rotatably connected, and any adjacent intermediate frames and frame structures are rotatably connected, thereby enabling the unfolding and folding of the entire photovoltaic module. Furthermore, any two adjacent intermediate frames are riveted together, and any adjacent intermediate frames and frame structures are riveted together, ensuring the strength of the frame in all three axial directions and effectively reducing the product thickness. The framework here includes the frame structures and the intermediate frames.

[0039] In the above technical solution, optionally, the gap between any two adjacent intermediate frames is greater than or equal to 0.1 mm and less than or equal to 0.3 mm, for example, 0.1 mm or 0.3 mm.

[0040] In the above technical solution, optionally, the gap between any adjacent intermediate frame and edge structure is greater than or equal to 0.1mm and less than or equal to 0.3mm, for example, 0.1mm or 0.3mm.

[0041] In the above technical solution, optionally, the middle frame is composed of multiple enclosure panels, and the width of each enclosure panel and the width of each support panel are the same.

[0042] In this embodiment, except for the handle plate, the other frames have the same thickness and width. That is, all the surrounding plates and support plates have the same thickness and width, and a relatively symmetrical structure is adopted. In this way, under high temperature and vacuum lamination pressure, the thermal deformation trend and performance of the material are consistent, and the deformation and warping of the frame can be effectively controlled.

[0043] In the above technical solution, optionally, the number of intermediate frames is greater than or equal to 3 and less than or equal to 5.

[0044] In this embodiment, the number of battery layers is set according to different needs, thereby determining the number of intermediate frames. For example, it can be 3, 4 or 5. Attached Figure Description

[0045] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0046] Figure 1 A schematic diagram of the structure of a photovoltaic module according to an embodiment of this application is shown;

[0047] Figure 2 This illustration shows one of the structural diagrams of the border structure and the middle frame according to an embodiment of this application;

[0048] Figure 3 The second schematic diagram shows the border structure and the middle frame of one embodiment of this application.

[0049] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0050] 1. Frame structure, 11. Support plate, 12. Handle plate, 122. Hollowed-out area, 13. Installation space, 2. Photovoltaic module, 201. Light-receiving layer, 202. First adhesive layer, 203. Front support layer, 204. Second adhesive layer, 205. Battery layer, 206. Third adhesive layer, 207. Rear support layer, 208. Fourth adhesive layer, 209. Backlight layer, 21. Middle frame, 211. Enclosure plate, 212. Connecting film. Detailed Implementation

[0051] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0052] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0053] like Figure 1 and Figure 2 As shown, the first aspect of this utility model provides a frame structure 1 applied to a photovoltaic module 2. The photovoltaic module 2 includes a battery layer 205. The frame structure 1 includes: at least one support plate 11; a handle plate 12 connected to the support plate 11. The handle plate 12 and at least one support plate 11 enclose an installation space 13. The battery layer 205 is disposed in the installation space 13. The handle plate 12 is provided with a hollow area 122. The handle plate 12 includes a composite plate containing a glass fiber mesh.

[0054] The frame structure 1 provided by this utility model is applied to a photovoltaic module 2. The photovoltaic module 2 includes a battery layer 205. The frame structure 1 includes at least one support plate 11 and a handle plate 12. At least one support plate 11 is connected to another support plate 11. The handle plate 12 and at least one support plate 11 enclose an installation space 13. The battery layer 205 is disposed in the installation space 13. The handle plate 12 has a hollow area 122. The handle plate 12 includes a composite board containing a glass fiber mesh. Since the glass fiber mesh is mesh-like, it is equivalent to bidirectional wire drawing, which makes the deformation resistance of the handle plate 12 almost the same in different directions, thereby avoiding the problem of the handle plate 12 breaking. That is, the tensile strength of the handle plate 12 is the same or almost the same in the length direction and the width direction, so the difference in the deformation resistance in different directions is small, thereby avoiding the problem of the handle plate 12 breaking. It should be noted that the tensile strength of the handle plate 12 being the same or almost the same in the length direction and the width direction means that the difference in the tensile strength of the handle plate 12 in the length direction and the width direction is less than a preset value, for example, less than 10 MPa. The length direction and width direction refer to the length direction and width direction of the handle plate 12, respectively.

[0055] In the above technical solution, optionally, the frame structure 1 also includes a handle, which is disposed on the handle plate 12, so that the user can unfold or overlap the photovoltaic module 2 by holding the handle. Optionally, the handle is disposed in the hollow area 122 of the handle plate 12, which helps to further improve the strength of the handle plate 12.

[0056] Optionally, in the above technical solution, the handle plate 12 includes a fiberglass mesh-epoxy resin composite board.

[0057] In this technical solution, the handle plate 12 can be formed by pressing glass fiber mesh (glass fiber cloth) with epoxy resin, thereby ensuring that the handle plate 12 has consistent strength in different directions.

[0058] In the above technical solution, optionally, the support plate 11 includes a polyester fiberglass board. Alternatively, the support plate 11 includes a polyurethane fiberglass board. Polyurethane fiberglass board can effectively solve the problem of deformation due to long-term outdoor exposure. Furthermore, because polyurethane fiberglass board has strong resistance to bending deformation along its length, it can effectively solve the problem of product thermal deformation as the support plate 11.

[0059] In the above technical solution, optionally, the thickness of the handle plate 12 is greater than or equal to 1 mm and less than or equal to 2 mm. Optionally, the thickness of the handle plate 12 is 1 mm or 2 mm.

[0060] In the above technical solution, optionally, the thickness of the support plate 11 is greater than or equal to 2 mm and less than or equal to 3 mm. Optionally, the thickness of the support plate 11 is 2 mm or 3 mm.

[0061] In the above technical solution, optionally, the width of the support plate 11 is greater than or equal to 15mm and less than or equal to 17mm. Optionally, the width of the support plate 11 is 15mm or 16mm.

[0062] In the above technical solution, optionally, the number of support plates 11 is three. The shape of the frame structure 1 is square. That is, the three support plates 11 and one handle plate 12 form a square structure, thereby wrapping the battery layer 205 inside and protecting the battery layer 205.

[0063] like Figure 1 As shown, the second aspect of this utility model provides a photovoltaic module 2, including: a frame structure 1 of any of the technical solutions of the first aspect of this application; and a battery layer 205 disposed in the installation space 13.

[0064] In the above technical solution, optionally, the photovoltaic module 2 further includes: a light-receiving layer 201; a front support layer 203 disposed on one side of the light-receiving layer 201; a rear support layer 207 disposed on the side of the front support layer 203 away from the light-receiving layer 201, and the frame structure 1 disposed between the front support layer 203 and the rear support layer 207; and a backlight layer 209 disposed on the side of the rear support layer 207 away from the front support layer 203.

[0065] In this embodiment, the photovoltaic module 2, from top to bottom, includes a light-receiving layer 201, a front support layer 203, a battery layer 205, a rear support layer 207, and a backlight layer 209. The frame structure 1 of this invention surrounds the outside of the battery layer 205, providing good support for the battery layer 205. The light-receiving layer 201 mainly serves to resist ultraviolet radiation and weathering. The front support layer 203 and the rear support layer 207 enhance the impact resistance of both sides of the battery layer 205 while minimizing light transmission obstruction. Furthermore, it should be noted that the photovoltaic module 2 of this application can be used on both sides; that is, the light-receiving layer 201 and the backlight layer 209 are the same layer. When the light-receiving layer 201 faces the sunlight, it receives sunlight; conversely, when the backlight layer 209 faces the sunlight, it receives sunlight.

[0066] Optionally, in the above technical solution, the photovoltaic module 2 further includes: a first adhesive layer 202 disposed between the light-receiving layer 201 and the front support layer 203; a second adhesive layer 204 disposed between the front support layer 203 and the cell layer 205; a third adhesive layer 206 disposed between the cell layer 205 and the rear support layer 207; and a fourth adhesive layer 208 disposed between the rear support layer 207 and the backlight layer 209.

[0067] In this embodiment, by providing an adhesive layer between the light-receiving layer 201, the front support layer 203, the battery layer 205, the rear support layer 207 and the backlight layer 209, the overall stability of the photovoltaic module 2 can be improved.

[0068] In the above technical solution, optionally, the light-receiving layer 201 includes a PVDF (Polyvinylidene Fluoride) layer and / or an ETFE (Ethylene Tetrafluoroethylene) layer.

[0069] In this embodiment, both the PVDF board and the ETFE board have excellent weather resistance, corrosion resistance and chemical stability, so they have a good protective effect during the installation of the photovoltaic module 2. They can effectively prevent the photovoltaic module 2 from being affected by environmental factors such as ultraviolet rays, rain and temperature changes, thereby improving the service life and performance of the photovoltaic module 2.

[0070] In the above technical solution, optionally, the front support layer 203 includes a PET (Polyethylene Terephthalate) layer.

[0071] In this embodiment, PET possesses excellent physical and mechanical properties, chemical resistance, optical properties, and electrical properties, thus it can be used as the front support layer 203 of the photovoltaic module 2. PET has high light transmittance, which can effectively transmit sunlight and improve the power generation efficiency of the photovoltaic module 2. Furthermore, PET has good weather resistance, allowing it to be used in harsh environmental conditions and extending the service life of the photovoltaic module 2.

[0072] In the above technical solution, optionally, the front support layer 203 has two or more layers. For example, it can have two or three layers.

[0073] In the above technical solution, optionally, the transparency of the front support layer 203 is greater than or equal to 95%. Alternatively, the transparency of the front support layer 203 is greater than or equal to 99%, thereby ensuring power generation efficiency.

[0074] In the above technical solution, the battery layer 205 may optionally include one or a combination of the following: IBC (Interdigitated Back Contact) battery layer, TOPcon (Tunnel Oxide Passivated Contact) battery layer, PERC (Passivated Emitter Rear Contact) battery layer, and HJT (Heterojunction) battery layer.

[0075] In this embodiment, the IBC battery layer 205, TOPcon battery layer 205, PERC battery layer 205 and HJT battery layer 205 all have long photoelectric conversion lifetime and low power attenuation. The batteries are laser-cut half-pieces or multiple pieces to meet the requirements of series voltage and anti-hot spot effect.

[0076] In the above technical solution, optionally, the gap between the battery layer 205 and the frame structure 1 is greater than or equal to 3mm.

[0077] In this embodiment, a certain gap is provided between the battery layer 205 and the frame structure 1, so that when subjected to external force, the frame structure 1 has a certain displacement buffer, thereby preventing the battery layer 205 from being scratched and damaged. However, the gap should not be too large, and optionally, it should be less than or equal to 5mm.

[0078] Optionally, in the above technical solution, the back support layer 207 includes a PET layer.

[0079] In this embodiment, PET possesses excellent physical and mechanical properties, chemical resistance, optical properties, and electrical properties, thus it can be used as the back support layer 207 of the photovoltaic module 2. PET has high light transmittance, which can effectively transmit sunlight and improve the power generation efficiency of the photovoltaic module 2. Furthermore, PET has good weather resistance, allowing it to be used in harsh environmental conditions and extending the service life of the photovoltaic module 2.

[0080] In the above technical solution, the backlight layer 209 may optionally include a PVDF layer and / or an ETFE layer.

[0081] In this embodiment, both the PVDF board and the ETFE board have excellent weather resistance, corrosion resistance and chemical stability, so they have a good protective effect during the installation of the photovoltaic module 2. They can effectively prevent the photovoltaic module 2 from being affected by environmental factors such as ultraviolet rays, rain and temperature changes, thereby improving the service life and performance of the photovoltaic module 2.

[0082] In the above technical solution, optionally, the total thickness of the third adhesive layer 206, the rear support layer 207, and the fourth adhesive layer 208 is greater than or equal to 1 mm and less than or equal to 2 mm. Optionally, 1 mm or 2 mm.

[0083] In the above technical solution, optionally, the total thickness of the photovoltaic module 2 is greater than or equal to 4.5mm and less than or equal to 5.5mm. Optionally, it can be 4.5mm, 5mm, or 5.5mm.

[0084] In the above technical solution, optionally, the first adhesive layer 202, the second adhesive layer 204, the third adhesive layer 206 and the fourth adhesive layer 208 all include an EVA (Ethylene Vinyl Acetate) adhesive layer and / or a POE (Polyolefin Elastomer) adhesive layer.

[0085] In this embodiment, both the EVA layer and the POE layer have excellent connectivity, which improves the overall stability of the photovoltaic module 2.

[0086] In the above technical solution, optionally, the number of frame structures 1 is two, and the photovoltaic module 2 also includes multiple intermediate frames 21. The multiple intermediate frames 21 are disposed between the two frame structures 1. A battery layer 205 is provided inside any intermediate frame 21. Any two adjacent intermediate frames 21 are riveted together, and any two adjacent intermediate frames 21 are riveted together with the frame structure 1.

[0087] In this embodiment, multiple intermediate frames 21 are disposed between two frame structures 1, thereby forming the frame of the entire battery layer 205. Any two adjacent intermediate frames 21 are rotatably connected, and any two adjacent intermediate frames 21 are rotatably connected to the frame structure 1, thereby realizing the unfolding and folding of the entire photovoltaic module 2. In addition, any two adjacent intermediate frames 21 are riveted together, and any two adjacent intermediate frames 21 are riveted together to the frame structure 1, thus ensuring the strength of the frame in the three axial directions and effectively reducing the product thickness. The frame here includes the frame structure 1 and the intermediate frames 21.

[0088] In the above technical solution, optionally, the gap between any two adjacent intermediate frames 21 is greater than or equal to 0.1 mm and less than or equal to 0.3 mm, for example, 0.1 mm or 0.3 mm.

[0089] In the above technical solution, optionally, the gap between any adjacent intermediate frame 21 and frame structure 1 is greater than or equal to 0.1 mm and less than or equal to 0.3 mm, for example, 0.1 mm or 0.3 mm.

[0090] In the above technical solution, optionally, the middle frame 21 is formed by multiple enclosures 211, and the width of each enclosure 211 and the width of each support plate 11 are the same.

[0091] In this embodiment, except for the handle plate 12, the other frames adopt the same thickness and width, that is, all the surrounding plates 211 and support plates 11 have the same thickness and width, and adopt a relatively symmetrical structure. In this way, under high temperature and vacuum lamination pressure, the thermal deformation trend and performance of the material are consistent, and the deformation and warping of the frame can be effectively controlled.

[0092] In the above technical solution, optionally, the number of intermediate frames 21 is greater than or equal to 3 and less than or equal to 5.

[0093] In this embodiment, the number of battery layers 205 is set according to different needs, thereby determining the number of intermediate frames 21. For example, it can be 3, 4 or 5.

[0094] Another embodiment of this application provides a frame structure. It should be understood that: 1. To reduce product weight and address high-temperature aging and deformation issues, the double-sided portable solar panel uses a polyurethane fiberglass board frame riveted instead of an epoxy fiberglass board. 2. With a frame made entirely of polyurethane fiberglass boards, the handle area is prone to breakage after drops from different angles due to the large amount of open space at the handle and the need to bear the weight of the entire product; 3. Polyurethane fiberglass boards are generally produced using a pultrusion process, with the fiberglass filaments extending along the pultrusion direction. Therefore, the deformation resistance in the pultrusion direction is strong, resulting in poor deformation resistance in the other direction.

[0095] The frame structure of this utility model still uses polyurethane fiberglass board for the overall frame and epoxy fiberglass board for the handle, which solves the problem of brittle fracture caused by the large difference in the deformation resistance of polyurethane fiberglass board in different directions. The epoxy fiberglass board can be made by pressing glass fiber cloth and epoxy resin together, which can ensure consistent strength in different directions. Except for the handle frame, the thickness and width of other frames are the same, and all frames are riveted.

[0096] More specifically, such as Figure 1 As shown, the photovoltaic module 2 in this embodiment is configured from top to bottom as follows: light-receiving layer 201 (ETFE / PVDF film), first adhesive layer 202, front support layer 203 (transparent PET), second adhesive layer 204 (EVA), battery layer 205, third adhesive layer 206, rear support layer 207 (transparent PET), fourth adhesive layer 208 and backlight layer 209 (ETFE / PVDF film).

[0097] The light-receiving layer 201 material is generally PVDF or ETFE, and mainly serves to resist ultraviolet rays and weathering.

[0098] The first adhesive layer 202, the front support layer 203, and the second adhesive layer 204 constitute the front protective layer of the battery. The adhesive layers are generally transparent EVA and POE, etc. Transparent PET is mainly used to enhance the impact resistance of the front of the battery and to minimize the obstruction of light transmission. The number of PET layers can be multi-layered and can be adjusted according to the PET thickness and product toughness. One layer can be selected.

[0099] The battery layer 205 is made of IBC / TOPcon / PERC / HJT cells, etc. The cells are laser-cut half or multiple pieces to meet the requirements of series voltage and anti-hot spot design.

[0100] The frame structure 1 is mainly designed to enhance the impact resistance of the sides and corners. The battery layer 205 is embedded in the middle of the frame structure 1. The frame structure 1 and the battery layer 205 maintain a distance of more than 3mm. At the same time, the two ends of the frame structure 1 are designed with handle mounting positions, which facilitates the installation of handles and makes it easy to carry.

[0101] The third adhesive layer 206, the rear support layer 207, the fourth adhesive layer 208, and the backlight layer 209 constitute the back protective layer of the photovoltaic module 2;

[0102] The total thickness of the third adhesive layer 206, the rear support layer 207, and the fourth adhesive layer 208 is 1.5mm ± 0.5mm, and the total thickness of the photovoltaic module 2 is approximately 5mm ± 0.5mm.

[0103] The structure of the framework, such as Figure 1 and Figure 2As shown, the entire battery frame consists of four sub-frames, with a power generation unit (battery layer 205) in the middle of each sub-frame. Each sub-frame is riveted together from four separate frame plates, with a gap of 0.2mm ± 0.1mm between the riveting plates.

[0104] The handle plate 12 is made of epoxy fiberglass board, which is formed by pultrusion of polyurethane resin and glass fiber. The thickness of the handle plate 12 is 1.6mm±0.2mm. It mainly protects the battery layer 205 and prevents the product from being deformed and bent by heat, making it impossible to store. The thickness of a single layer is less than the thickness of the handle plate 12, so that the total thickness of the stacked shell material exceeds the power generation unit in the middle position.

[0105] The other frame panels are all polyurethane fiberglass boards, manufactured using a laminated pressing process. The total thickness of photovoltaic module 2 is 2.5mm ± 0.2mm, and the width is 16mm ± 0.2mm.

[0106] The overall structure of the W-shaped photovoltaic module 2 after unfolding, as follows: Figure 3 As shown, the photovoltaic module 2 can be folded and stored, and then operated by the handle.

[0107] The connecting film 212 is a flexible film composed of an adhesive film and a weather-resistant film, which connects the two frames to enable the photovoltaic module 2 to expand and contract.

[0108] The beneficial effects of the border structure in this application are as follows:

[0109] 1. The main body is made of polyurethane fiberglass board, which can effectively solve the risk of deformation due to long-term outdoor exposure; while the epoxy fiberglass board at the handle can ensure consistent bending strength in different dimensions and prevent brittle fracture caused by drops.

[0110] 2. The polyurethane fiberglass board in the main body has stronger resistance to bending deformation along the length direction than the epoxy fiberglass board, which can effectively solve the problem of product thermal deformation.

[0111] 3. Except for the handle frame, the other frames use the same thickness and width, with a relatively symmetrical structure. Under high temperature and vacuum lamination pressure, the thermal deformation trend and performance of the material are consistent, and the deformation and warping of the frame can be effectively controlled.

[0112] 4. The frame is connected by riveting, which ensures the strength of the frame in three axial directions and effectively reduces the thickness of the product.

[0113] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," 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 application. 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 any one embodiment or example.

[0114] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A border structure, characterized in that, Applied to photovoltaic modules, the photovoltaic modules include a cell layer, and the frame structure includes: At least one support plate; A handle plate is connected to the support plate, and the handle plate and at least one of the support plates enclose an installation space. The battery layer is disposed in the installation space, and the handle plate has a hollow area. The handle panel includes a composite panel containing fiberglass mesh.

2. The frame structure according to claim 1, characterized in that, The handle panel comprises a fiberglass mesh-epoxy resin composite board.

3. The frame structure according to claim 1, characterized in that, The support plate includes a polyester fiberglass board; or The support plate includes a polyurethane fiberglass board.

4. The frame structure according to claim 1, characterized in that, The thickness of the handle plate is greater than or equal to 1 mm and less than or equal to 2 mm; and / or The thickness of the support plate is greater than or equal to 2 mm and less than or equal to 3 mm; and / or The width of the support plate is greater than or equal to 15 mm and less than or equal to 17 mm; and / or The number of support plates is three; and / or The border structure is square in shape.

5. A photovoltaic module, characterized in that, include: The border structure as described in any one of claims 1 to 4; A battery layer is provided in the installation space.

6. The photovoltaic module according to claim 5, characterized in that, Also includes: Light-receiving layer; A front support layer is disposed on one side of the light-receiving layer; A rear support layer is disposed on the side of the front support layer away from the light-receiving layer, and the frame structure is disposed between the front support layer and the rear support layer; A backlight layer is disposed on the side of the rear support layer away from the front support layer.

7. The photovoltaic module according to claim 6, characterized in that, Also includes: A first adhesive layer is disposed between the light-receiving layer and the front support layer; A second adhesive layer is disposed between the front support layer and the battery layer; A third adhesive layer is disposed between the battery layer and the rear support layer; The fourth adhesive layer is disposed between the rear support layer and the backlight layer.

8. The photovoltaic module according to claim 7, characterized in that, The light-receiving layer includes a PVDF layer and / or an ETFE layer; and / or The front support layer includes a PET layer; and / or The number of layers in the front support layer is greater than or equal to 2; and / or The transparency of the front support layer is greater than or equal to 95%; and / or The battery layer includes one or a combination of the following: IBC battery layer, TOPcon battery layer, PERC battery layer, and HJT battery layer; and / or The gap between the battery layer and the frame structure is greater than or equal to 3 mm; and / or The rear support layer includes a PET layer; and / or The backlight layer includes a PVDF layer and / or an ETFE layer; and / or The total thickness of the third adhesive layer, the rear support layer, and the fourth adhesive layer is greater than or equal to 1 mm and less than or equal to 2 mm. and / or The total thickness of the photovoltaic module is greater than or equal to 4.5 mm and less than or equal to 5.5 mm; The first adhesive layer, the second adhesive layer, the third adhesive layer and the fourth adhesive layer all include an EVA adhesive layer and / or a POE adhesive layer.

9. The photovoltaic module according to claim 5, characterized in that, The number of frame structures is two, and the photovoltaic module also includes: Multiple intermediate frames are provided between two border structures. A battery layer is provided inside any intermediate frame. Any two adjacent intermediate frames are riveted together, and any two adjacent intermediate frames are riveted together with the border structure.

10. The photovoltaic module according to claim 9, characterized in that, The gap between any two adjacent intermediate frames is greater than or equal to 0.1 mm and less than or equal to 0.3 mm; and / or The gap between any two adjacent intermediate frames and the edge structure is greater than or equal to 0.1 mm and less than or equal to 0.3 mm; and / or The number of intermediate frames is greater than or equal to 3 and less than or equal to 5.

Images