Solar panel and photovoltaic system

Abstract

The invention provides a solar panel and a photovoltaic system, and the solar panel comprises a frame which is provided with an accommodation hole. And the battery layer is positioned in the accommodating hole. And the front plate is arranged on one side of the frame. And the back plate is arranged on the other side of the frame. The electric connection assembly is located in the containing hole, the electric connection assembly is arranged between the battery layer and the back plate, the electric connection assembly is arranged close to one edge of the frame, and the electric connection assembly extends along the edge. The electric connection assembly is arranged at the position closer to the frame, so that the overlapped area of the electric connection assembly and the battery layer is closer to the frame, and the frame can share the lamination pressure of the battery layer during lamination treatment, so that the battery pieces in the battery layer are prevented from being broken during lamination treatment.

Description

Technical Field

[0001] This invention relates to the field of solar panel technology, and more specifically, to a solar panel and a photovoltaic system. Background Technology

[0002] In current technologies, portable solar photovoltaic panels are designed with bending zones. To ensure the circuit connection in these zones, flexible connectors are used to electrically connect the solar cells on both sides of the bending zone. However, the thickness of the connection between the flexible connector and the solar cell is increased. During the lamination process of the solar photovoltaic panel, the solar cell may crack due to the concentrated pressure at the connection point.

[0003] Therefore, how to develop a solar panel and photovoltaic system that can prevent solar cells from cracking during lamination has become an urgent technical problem to be solved. Summary of the Invention

[0004] The purpose of this invention is to provide a solar panel and photovoltaic system that can avoid solar cell cracking during lamination, thus solving the problem of solar cell cracking during lamination of existing portable solar panels.

[0005] In view of this, the first aspect of the present invention provides a solar panel.

[0006] A second aspect of the present invention provides a photovoltaic system.

[0007] The solar panel provided by this invention includes: a frame with receiving holes in it; a battery layer located in the receiving holes; a front panel disposed on one side of the frame; a back panel disposed on the other side of the frame; and an electrical connection assembly located within the receiving holes, positioned between the battery layer and the back panel, and located near one edge of the frame, extending along that edge.

[0008] In this design, the solar panel includes a frame, a battery layer, a front panel, a back panel, and an electrical connection assembly. The frame has receiving holes in which the battery layer and the electrical connection assembly are disposed, positioned between the battery layer and the back panel. The electrical connection assembly is located near one edge of the frame and extends along that edge. It is understood that although the electrical connection assembly overlaps with the battery layer, it is closer to the edge of the frame than the center of the battery layer. In an alternative embodiment, the electrical connection assembly overlaps with the edge of the battery layer. By positioning the electrical connection assembly closer to the frame, the overlapping area between the electrical connection assembly and the battery layer is closer to the frame. The frame can share the lamination pressure of the battery layer during lamination, thereby preventing the battery cells in the battery layer from breaking during lamination.

[0009] In some possible designs, the number of frames is at least two, with a gap between two adjacent frames. The battery layer includes at least two battery packs, the number of which is the same as the number of frames, and the at least two battery packs are respectively disposed within at least two frames.

[0010] In this design, there are at least two frames, and the battery layer also includes at least two battery packs. The number of battery packs is the same as the number of frames, and at least two battery packs are respectively set in at least two frames, that is, one battery pack is set in each frame. There is a gap between two adjacent frames. Since there is no rigid material in the gap, the solar panel can be bent.

[0011] In some possible designs, the solar panel also includes: a flexible connection component, which is partially disposed within the gap, with its two ends respectively connected to electrical connection components in adjacent frames.

[0012] In this design, the solar panel also includes a flexible connection assembly for connecting electrical connections to adjacent frames. Because the gaps allow for bending, the flexible connection assembly is placed within these gaps to prevent breakage when the solar panel is bent. The flexible connection assembly comprises a braided copper strip, which is composed of multiple small copper strips with a copper core and a tin-plated surface. Each copper strip has a diameter of 0.08 mm, and 13 strips are bundled together, resulting in 24 bundles. The thickness of the braided copper strip is greater than or equal to 0.2 mm and less than or equal to 0.5 mm. It can be bent and welded, ensuring that the braided copper strip does not break in the bending area. The flexible connection assembly and the electrical connection assembly are integrated into a single design, both using braided copper strips.

[0013] In some possible designs, the solar panel may also include: a first encapsulating film disposed between the front panel and the battery layer; a second encapsulating film disposed between the back panel and the battery layer; and at least one insulating strip that covers at least the flexible connection assembly located in the gap to isolate the flexible connection assembly located in the gap from the first and second encapsulating films.

[0014] In this design, the solar panel also includes: a first encapsulating film, a second encapsulating film, and at least one insulating strip. The first encapsulating film is disposed between the front panel and the battery layer to connect them. The second encapsulating film is disposed between the back panel and the battery layer to connect them. At least one insulating strip covers at least the flexible connecting component located in the gap, isolating the flexible connecting component from the first and second encapsulating films. The insulating strip has a polyimide substrate, a black surface, a thickness greater than or equal to 0.025 mm and less than or equal to 0.2 mm, a temperature resistance range of -20℃ to 260℃, and an acrylic adhesive surface. The insulating strip can adhere woven copper strips with surface adhesive, while also exhibiting excellent insulation properties and a breakdown voltage exceeding 10KV.

[0015] In some possible designs, the frame includes at least two receiving holes, and the battery pack includes at least two solar cells, each of which is disposed in one of the at least two receiving holes.

[0016] In this design, the frame includes at least two receiving holes, and each battery pack includes at least two solar cells, with each solar cell positioned in a different receiving hole. This provides the frame with more support points, allowing it to withstand greater pressure compared to a design with only one receiving hole, thus further protecting the battery cells from breakage.

[0017] The solar cells include one of the following: half-cell solar cells and multi-cell solar cells.

[0018] In some possible designs, the front panel includes at least two sub-front panels, the number of which is the same as the number of battery packs. The sub-front panels are positioned on one side of the battery packs, and the gap between two connected sub-front panels corresponds to the gap between two adjacent frames. The back panel includes at least two sub-back panels, the number of which is the same as the number of battery packs. The sub-back panels are positioned on the other side of the battery packs, and the gap between two connected sub-back panels corresponds to the gap between two adjacent frames.

[0019] In this design, the front panel includes at least two sub-front panels, the number of which is the same as the number of battery packs. The sub-front panels are positioned on one side of the battery packs, and the gap between two connected sub-front panels corresponds to the gap between two adjacent frames. The back panel includes at least two sub-back panels, the number of which is the same as the number of battery packs. The sub-back panels are positioned on the other side of the battery packs, and the gap between two connected sub-back panels corresponds to the gap between two adjacent frames. Since the front and back panels have a certain degree of rigidity, they should not appear in the gap between two adjacent frames. Therefore, the sub-front and sub-back panels, positioned corresponding to the battery packs, ensure light transmission and protect the batteries.

[0020] In some possible designs, the solar panel also includes: multiple insulating strips disposed between the electrical connection components and the battery layers to isolate the electrical connection components and the battery layers. The insulating strips include: an insulating layer disposed on one side of the electrical connection components; and an encapsulating film layer disposed on one side of the battery layers.

[0021] In this design, the solar panel also includes multiple insulating strips positioned between the electrical connection components and the battery layer. These strips provide electromagnetic isolation between the electrical connection components and the battery layer, preventing entanglement between them. Furthermore, each insulating strip comprises an insulating layer and an adhesive film layer. The adhesive film layer is positioned closer to the battery layer to prevent it from affecting the electrical connection components and thus preventing breakage. The insulating layer, made of black PET or PI film, is placed between the battery cells and the braided copper strip, providing electrical insulation. The thickness of the insulating layer is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. The adhesive film layer, made of EVA or POE film, provides adhesion and cushioning.

[0022] In some possible designs, the thickness of the frame is H1, the thickness of the battery layer is H2, the thickness of the electrical connection components is H3, and the thickness of the isolation strip is H4, where H1 ≥ H2 + H3 + H4.

[0023] In this design, the thickness of the frame must be greater than or equal to the thickness of the battery layer plus the thickness of the electrical connection components plus the thickness of the separator. This way, during lamination, the pressure will be applied to the thicker frame, reducing the pressure on the battery layer and effectively preventing the battery cells in the battery layer from breaking.

[0024] In some possible designs, the solar panel also includes: multiple busbars set within the frame, with one end of the busbars connected to the battery layer and the other end connected to the electrical connection assembly.

[0025] In this design, the solar panel also includes multiple busbars set within the frame. One end of each busbar is connected to the battery layer, and the other end is connected to the electrical connection assembly. In other words, the busbars electrically connect the battery layer and the electrical connection assembly. Furthermore, the busbars can connect the solar cells within the battery layer together as needed.

[0026] In some possible designs, the distance from the battery layer to the frame is L1, where 2mm ≤ L1 ≤ 4mm.

[0027] In this design, the distance from the battery layer to the frame is L1, where 2mm≤L1≤4mm. An excessively large distance would cause the battery in the overlapping area to experience excessive lamination pressure.

[0028] In some possible designs, the frame includes one of the following: epoxy fiberglass frame, polyurethane fiberglass frame, and carbon fiber frame.

[0029] In this design, the frame includes one of the following: an epoxy fiberglass frame, a polyurethane fiberglass frame, and a carbon fiber frame. The frame's bending strength is greater than or equal to 180 MPa and less than or equal to 220 MPa, which greatly enhances the impact resistance of the battery's sides and corners. The frame can also be designed with handles for easy installation.

[0030] In some possible designs, the thickness of the front panel is H5, 0.2mm≤H5≤0.4mm; and / or the light transmittance of the front panel is greater than or equal to 90%; and / or the thickness of the back panel is H6, 0.4mm≤H6≤0.8mm; and / or the light transmittance of the back panel is greater than or equal to 86%.

[0031] In this design, the front panel uses a conventional thickness to ensure light transmittance, while the back panel uses an unconventional thickness. By thickening the back panel, the bending strength that the back panel can withstand is greatly increased. The bending strength of the thickened back panel is about 100MPa, while the bending strength of two conventional thickness back panels plus a middle layer of adhesive film is about 30MPa.

[0032] In some possible designs, the solar panel also includes: a first weather-resistant film disposed on the front panel away from the battery layer; a third encapsulating film disposed between the first weather-resistant film and the front panel; a second weather-resistant film disposed on the back panel away from the battery layer; and a fourth encapsulating film disposed between the second weather-resistant film and the back panel.

[0033] In this design, a weather-resistant membrane is applied to the outer side of the front and back panels to provide resistance to ultraviolet radiation and weather corrosion.

[0034] According to a second aspect of the present invention, a photovoltaic system is also provided, comprising: a solar panel as described in any of the above-described technical solutions.

[0035] The photovoltaic system provided by the second aspect of the present invention, because it includes the solar panel proposed in any of the above-mentioned technical solutions, has all the beneficial effects of the solar panel.

[0036] The solar panel of this invention includes a frame, a battery layer, a front panel, a back panel, and an electrical connection assembly. The frame has receiving holes, in which the battery layer and the electrical connection assembly are disposed, and between the battery layer and the back panel. The electrical connection assembly is positioned near one edge of the frame and extends along that edge. It is understood that although the electrical connection assembly overlaps with the battery layer, it is closer to the edge of the frame than the center of the battery layer. In an alternative embodiment, the electrical connection assembly overlaps with the edge of the battery layer. By positioning the electrical connection assembly closer to the frame, the overlapping area between the electrical connection assembly and the battery layer is closer to the frame. This allows the frame to share the pressure of the battery pack during lamination, thereby preventing the battery cells in the battery pack from breaking during lamination.

[0037] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0038] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0039] Figure 1 This is one of the schematic diagrams of a solar panel according to an embodiment of the present invention;

[0040] Figure 2 This is a second schematic diagram of a solar panel according to an embodiment of the present invention;

[0041] Figure 3 This is a third schematic diagram of a solar panel according to an embodiment of the present invention;

[0042] Figure 4 This is a fourth schematic diagram of a solar panel according to an embodiment of the present invention;

[0043] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle.

[0044] in, Figures 1 to 5 The correspondence between the reference numerals and the component names is as follows:

[0045] 1 Solar panel, 2 Battery layer, 202 Battery pack, 204 Frame, 205 Accommodation hole, 206 Gap, 208 Busbar, 22 Flexible connection assembly, 3 Front panel, 32 Sub-front panel, 4 Back panel, 42 Sub-back panel, 5 Separator strip, 50 Separator layer, 52 Adhesive film layer, 6 Separator strip, 60 First adhesive film, 62 Second adhesive film, 64 Third adhesive film, 66 Fourth adhesive film, 7 First weather-resistant film, 8 Second weather-resistant film, 9 Electrical connection assembly. Detailed Implementation

[0046] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be optionally 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.

[0047] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0048] The following reference Figures 1 to 5 This invention describes a solar panel and a photovoltaic system proposed according to some embodiments of the present invention.

[0049] According to one embodiment of the present invention, such as Figures 1 to 5 As shown, the present invention proposes a solar panel 1 comprising: a frame 204 having a receiving hole 205; a battery layer 2 located within the receiving hole 205; a front panel 3 disposed on one side of the frame 204; a back panel 4 disposed on the other side of the frame 204; and an electrical connection assembly 9 located within the receiving hole 205, positioned between the battery layer 2 and the back panel 4, the electrical connection assembly 9 being disposed near one edge of the frame 204 and extending along the edge.

[0050] In this embodiment, the solar panel 1 includes a frame 204, a battery layer 2, a front panel 3, a back panel 4, and an electrical connection assembly 9. The frame 204 has a receiving hole 205, the battery layer 2 is disposed within the receiving hole 205, and the electrical connection assembly 9 is also disposed within the receiving hole 205, positioned between the battery layer 2 and the back panel 4. The electrical connection assembly 9 is located near one edge of the frame 204 and extends along that edge. It is understood that although the electrical connection assembly 9 overlaps with the battery layer 2, it is closer to the edge of the frame 204 than the center of the battery layer 2. In an alternative embodiment, the electrical connection assembly 9 overlaps with the edge of the battery layer 2. By positioning the electrical connection assembly 9 closer to the frame 204, the overlapping area between the electrical connection assembly 9 and the battery layer 2 is closer to the frame 204. The frame 204 can share the lamination pressure of the battery layer 2 during lamination, thereby preventing the battery cells in the battery layer 2 from breaking during lamination.

[0051] In some possible embodiments, such as Figure 2 and Figure 4 As shown, there are at least two frames 204, and there is a gap 206 between two adjacent frames 204. The battery layer 2 includes at least two battery packs 202, the number of battery packs 202 is the same as the number of frames 204, and the at least two battery packs 202 are respectively disposed in at least two frames 204.

[0052] In this embodiment, there are at least two frames 204, and the battery layer 2 also includes at least two battery packs 202. The number of battery packs 202 is the same as the number of frames 204, and at least two battery packs 202 are respectively disposed in at least two frames 204, that is, one battery pack 202 is disposed in each frame 204. There is a gap 206 between two adjacent frames 204. Since the gap 206 does not contain rigid material, the solar panel 1 can be bent.

[0053] In some possible embodiments, such as Figure 4 and Figure 5As shown, the solar panel 1 also includes a flexible connection component 22, which is partially disposed within the gap 206, and whose two ends are respectively connected to electrical connection components 9 in adjacent frames 204.

[0054] In this embodiment, the solar panel 1 also includes a flexible connection component 22 for connecting the electrical connection component 9 of the adjacent frame 204. Since the gap 206 is bendable, the flexible connection component 22 is installed in the gap 206 to prevent breakage when the solar panel 1 is bent. The flexible connection component 22 includes a braided copper strip composed of multiple small copper strips with a copper core and tin-plated surface. Each copper strip has a diameter of 0.08 mm, and 13 strips are bundled together, resulting in 24 bundles. The thickness of the braided copper strip is greater than or equal to 0.2 mm and less than or equal to 0.5 mm. It can be bent and welded, ensuring that the braided copper strip in the gap does not break. The flexible connection component 22 and the electrical connection component 9 are integrated in this embodiment, and both the electrical connection component 9 and the flexible connection component 22 use braided copper strips.

[0055] In some possible embodiments, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the solar panel 1 further includes: a first adhesive film 60 disposed between the front panel 3 and the battery layer 2; a second adhesive film 62 disposed between the back panel 4 and the battery layer 2; and at least one insulating strip 6, the insulating strip 6 covering at least the flexible connection component 22 located in the gap 206, so as to isolate the flexible connection component 22 located in the gap 206 from the first adhesive film 60 and the second adhesive film 62.

[0056] In this embodiment, the solar panel 1 further includes: a first adhesive film 60, a second adhesive film 62, and at least one insulating strip 6. The first adhesive film 60 is disposed between the front panel 3 and the battery layer 2 to connect the front panel 3 and the battery layer 2. The second adhesive film 62 is disposed between the back panel 4 and the battery layer 2 to connect the back panel 4 and the battery layer 2. At least one insulating strip 6 covers at least the flexible connecting component 22 located in the gap 206 to isolate the flexible connecting component 22 located in the gap 206 from the first adhesive film 60 and the second adhesive film 62. The substrate material of the insulating strip 6 is polyimide, with a black surface. The thickness of the insulating strip 6 is greater than or equal to 0.025 mm and less than or equal to 0.2 mm, with a temperature resistance range of -20℃ to 260℃, and the surface composition is acrylic adhesive. The insulating strip 6 can adhere the woven copper strip with surface adhesive, while also exhibiting excellent insulation properties and a breakdown voltage exceeding 10KV.

[0057] In some possible embodiments, the frame 204 includes at least two receiving holes 205, and the battery pack 202 includes at least two solar cells, each of which is disposed in one of the at least two receiving holes 205.

[0058] In this embodiment, the frame 204 includes at least two receiving holes 205, and each battery pack 202 includes at least two solar cells, with the solar cells respectively disposed in different receiving holes 205. This provides the frame 204 with more support points, allowing it to withstand more pressure compared to a design with only one receiving hole 205, thus further preventing the solar cells from breaking.

[0059] The solar cells include one of the following: half-cell solar cells and multi-cell solar cells.

[0060] In some possible embodiments, such as Figure 2 As shown, the front panel 3 includes at least two sub-front panels 32, the number of which is the same as the number of battery packs 202. The sub-front panels 32 are disposed on one side of the battery pack 202, and the gap 206 between two connected sub-front panels 32 corresponds to the gap 206 between two adjacent frames 204. The back panel 4 includes at least two sub-back panels 42, the number of which is the same as the number of battery packs 202. The sub-back panels 42 are disposed on the other side of the battery pack 202, and the gap 206 between two connected sub-back panels 42 corresponds to the gap 206 between two adjacent frames 204.

[0061] In this embodiment, the front panel 3 includes at least two sub-front panels 32, the number of which is the same as the number of battery packs 202. The sub-front panels 32 are disposed on one side of the battery pack 202, and the gap 206 between two connected sub-front panels 32 corresponds to the gap 206 between two adjacent frames 204. The back panel 4 includes at least two sub-back panels 42, the number of which is the same as the number of battery packs 202. The sub-back panels 42 are disposed on the other side of the battery pack 202, and the gap 206 between two connected sub-back panels 42 corresponds to the gap 206 between two adjacent frames 204. Since the front panel 3 and back panel 4 have a certain rigidity, they should not appear in the gap 206 between two adjacent frames 204. Therefore, the sub-front panels 32 and sub-back panels 42 corresponding to the battery pack 202 ensure light transmittance and protect the battery.

[0062] In some possible embodiments, the solar panel 1 further includes: a plurality of insulating strips 5 disposed between the electrical connection assembly 9 and the battery layer 2 to isolate the electrical connection assembly 9 and the battery layer 2. The insulating strips 5 include: an insulating layer 50 disposed on one side of the electrical connection assembly 9; and an adhesive film layer 52 disposed on one side of the battery layer 2.

[0063] In this embodiment, such as Figure 1 and Figure 5 As shown, the solar panel 1 also includes multiple insulating strips 5, which are disposed between the electrical connection component 9 and the battery layer 2 to electromagnetically isolate the electrical connection component 9 and the battery layer 2, thereby preventing entanglement between the battery layer 2 and the electrical connection component 9. Furthermore, the insulating strip 5 includes an insulating layer 50 and an adhesive film layer 52, wherein the adhesive film layer 52 is disposed on the side closer to the battery layer 2, which prevents the adhesive film layer 52 from affecting the electrical connection component 9 and prevents the electrical connection component 9 from breaking. The separator layer 50 is made of black PET (Polyethylene Terephthalate) or PI film (Polyimide Film), placed between the battery cell and the braided copper strip to provide electrical insulation. The thickness of the separator layer 50 is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. The adhesive layer 52 is made of EVA (Ethylene-Vinyl Acetate copolymer) or POE (Polyolefin Elastomer) film to provide adhesion and cushioning.

[0064] In some possible embodiments, such as Figure 1 As shown, the thickness of the frame 204 is H1, the thickness of the battery layer 2 is H2, the thickness of the electrical connection component 9 is H3, and the thickness of the isolation strip 5 is H4, wherein H1≥H2+H3+H4.

[0065] In this embodiment, the thickness of the frame 204 is greater than or equal to the thickness of the battery layer 2 plus the thickness of the electrical connection component 9 plus the thickness of the separator 5. In this way, during the lamination process, the pressure will be applied to the thicker frame 204, which will reduce the pressure on the battery layer 2 and effectively prevent the battery cells in the battery layer 2 from breaking.

[0066] In some possible embodiments, such as Figure 4 and Figure 5 As shown, the battery pack 202 also includes: a plurality of busbars 208 disposed within the frame 204, one end of the busbars 208 being connected to the battery layer 2, and the other end of the busbars 208 being connected to the electrical connection assembly 9.

[0067] In this embodiment, the battery pack 202 further includes multiple busbars 208 disposed within the frame 204. One end of each busbar 208 is connected to the battery layer 2, and the other end is connected to the electrical connection assembly 9. In other words, the busbars 208 can electrically connect the battery layer 2 and the electrical connection assembly. Simultaneously, the busbars 208 can also connect the battery cells in the battery layer 2 together as needed.

[0068] In some possible embodiments, such as Figure 1As shown, the distance from battery layer 2 to frame 204 is L1, where 2mm≤L1≤4mm.

[0069] In this embodiment, the distance from the battery layer 2 to the frame 204 is L1, where 2mm≤L1≤4mm. An excessively large distance would cause the battery in the overlapping area to experience excessive lamination pressure.

[0070] In some possible embodiments, frame 204 includes one of an epoxy fiberglass frame, a polyurethane fiberglass frame, and a carbon fiber frame.

[0071] In this embodiment, frame 204 includes one of an epoxy fiberglass frame, a polyurethane fiberglass frame, and a carbon fiber frame. The bending strength of frame 204 is greater than or equal to 180 MPa and less than or equal to 220 MPa, which greatly enhances the impact resistance of the battery's sides and corners. Frame 204 may also be equipped with handles for easy installation.

[0072] In some possible embodiments, such as Figure 1 As shown, the thickness of the front panel 3 is H5, 0.2mm≤H5≤0.4mm; and / or the light transmittance of the front panel 3 is greater than or equal to 90%; and / or the thickness of the back panel 4 is H6, 0.4mm≤H6≤0.8mm; and / or the light transmittance of the back panel 4 is greater than or equal to 86%.

[0073] In this embodiment, the front panel 3 uses a conventional thickness to ensure light transmittance, while the back panel 4 uses an unconventional thickness. By thickening the back panel 4, the bending strength that the back panel 4 can withstand is greatly increased. The bending strength of the thickened back panel 4 is about 100 MPa, while the bending strength of two conventional thickness back panels 4 with an intermediate adhesive film is about 30 MPa.

[0074] In some possible embodiments, such as Figure 2 As shown, the solar panel 1 further includes: a first weather-resistant film 7, disposed on the side of the front panel 3 away from the battery layer 2; a third adhesive film 64, disposed between the first weather-resistant film 7 and the front panel 3; a second weather-resistant film 8, disposed on the side of the back panel 4 away from the battery layer 2; and a fourth adhesive film 66, disposed between the second weather-resistant film 8 and the back panel 4.

[0075] In this embodiment, a weather-resistant film is provided on the outer side of the front panel 3 and the back panel 4 to provide resistance to ultraviolet radiation and weather corrosion.

[0076] The braided copper strip in solar panel 1 avoids contact with the adhesive film, thus preventing the braided copper strip from hardening and breaking due to adhesive penetration. The braided copper strip can withstand more than 10,000 bends. The frame and thickened backplate 4 significantly improve the solar panel 1's resistance to drop impacts, reducing product weight. The front is made of ordinary PET, while the back is made of thickened single-layer PET. Compared to double-layer PET, this saves one layer of adhesive film between the two layers, increasing strength and preventing heat-induced deformation during lamination. It does not reduce the light transmittance of the front side and allows for double-sided power generation, with the back side potentially increasing power output. Wiring along the frame edge utilizes the height difference between the fiberglass frame and the cells to address the issue of cell lamination cracking. The use of insulating strips prevents short circuits between the wiring and the cells.

[0077] The frame 204 in the solar panel 1 is located in the middle, and its stacking is preferably weather-resistant film-encapsulated film-front panel 3-encapsulated film-cell + frame 204-encapsulated film-back panel 4-encapsulated film-weather-resistant film. The first weather-resistant film includes one of PVDF (Polyvinylidene fluoride), PVF (Polyvinyl fluoride), and ETFE (Ethylene-Tetrafluoroethylene Copolymer), mainly serving to resist ultraviolet radiation and weathering. The first weather-resistant film 7 also includes a dotted structure disposed on the surface of the first weather-resistant film. The shape of the dotted structure includes one or both of circular and rhomboid shapes. When the dotted structure is circular, the diameter of the dotted structure is greater than or equal to 0.5 mm and less than or equal to 2 mm, the depth of the dotted structure is greater than or equal to 0.2 mm and less than or equal to 1 mm, and the distance between adjacent dotted structures is greater than or equal to 0.2 mm and less than or equal to 0.8 mm. When the pitted structure is rhomboid, the width of the pitted structure is greater than or equal to 0.5 mm and less than or equal to 2 mm, the depth of the pitted structure is greater than or equal to 0.2 mm and less than or equal to 1 mm, and the distance between adjacent pitted structures is greater than or equal to 0.2 mm and less than or equal to 0.8 mm.

[0078] The first adhesive film 60, the second adhesive film 62, the third adhesive film 64, and the fourth adhesive film 66 are made of transparent EVA or POE, and the front panel 3 is made of transparent PET. The 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. It is preferred to have one layer, and the thickness is generally preferred to be 0.3mm, with a light transmittance of more than 90%.

[0079] The battery pack 202 is composed of cells, including one or more of the following: IBC (Interdigitated Back Contact Cell), TOPCcon (Tunnel Oxide Passivated Contact Cell), PERC (Passivated Emitter and Rear Cell), and HJT (Heterojunction with Intrinsic Thin-layer). The cells are laser-cut half-pieces or multiple pieces to meet the requirements of series voltage and hot spot resistance design.

[0080] The total thickness of the solar panel 1 is greater than or equal to 4.5 mm and less than or equal to 5.5 mm. The thickness of the second adhesive film 62 plus the thickness of the back sheet 4 plus the thickness of the fourth adhesive film 66 plus the thickness of the second weather-resistant film 8 is greater than or equal to 1 mm and less than or equal to 2 mm. The thickness of the back sheet 4 is greater than or equal to 0.4 mm and less than or equal to 0.8 mm.

[0081] The braided copper strip overlaps with the edge of the battery pack 202 in the power generation area, and there is an insulating strip below it. The adhesive film layer 52 of the insulating strip faces the battery pack 202 and is used to insulate the braided copper strip from the battery pack 202. The wiring is close to the frame, and the distance between the battery and the frame is preferably greater than or equal to 2mm and less than or equal to 4mm. The increased thickness and height difference between the braided copper strip and the insulating strip will put additional pressure on the battery. Being close to the frame can utilize the height of the frame and the high bending strength of the thickened PET to buffer the laminator to solve the lamination pressure of 1MPa. Excessive lamination pressure on the battery cells below will cause them to crack.

[0082] According to a second aspect of the present invention, a photovoltaic system is also provided, comprising: a solar panel 1 as described in any of the above technical solutions.

[0083] The photovoltaic system provided by the second aspect of the present invention, since it includes the solar panel 1 proposed in any of the above technical solutions, has all the beneficial effects of the solar panel 1.

[0084] In this specification, the term "multiple" refers to two or more unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0085] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. 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.

[0086] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A solar panel, characterized in that, include: A frame, wherein the frame is provided with receiving holes; A battery layer located within the accommodating hole; The front panel is located on one side of the frame; A back panel is located on the other side of the frame; An electrical connection assembly is located within the receiving hole, disposed between the battery layer and the backplate, and is located near one edge of the frame, extending along the edge.

2. The solar panel according to claim 1, characterized in that, The number of frames is at least two, and there is a gap between two adjacent frames; The battery layer includes at least two battery packs, the number of which is the same as the number of frames, and the at least two battery packs are respectively disposed within at least two of the frames.

3. The solar panel according to claim 2, characterized in that, Also includes: A flexible connection component is partially disposed within the gap, and both ends of the flexible connection component are respectively connected to the electrical connection components within the adjacent frame.

4. The solar panel according to claim 3, characterized in that, Also includes: A first adhesive film is disposed between the front panel and the battery layer; A second adhesive film is disposed between the back sheet and the battery layer; At least one isolation strip, the isolation strip covering at least the flexible connecting component located within the gap, to isolate the flexible connecting component located within the gap from the first adhesive film and the second adhesive film.

5. The solar panel according to claim 2, characterized in that, The frame includes at least two receiving holes, and the battery pack includes at least two solar cells, with each of the at least two solar cells disposed in one of the at least two receiving holes.

6. The solar panel according to claim 2, characterized in that, The front panel includes at least two sub-front panels, the number of which is the same as the number of the battery pack. The sub-front panels are disposed on one side of the battery pack, and the gap between two connected sub-front panels corresponds to the gap between two adjacent frames. The backplate includes at least two sub-backplates, the number of which is the same as the number of the battery pack. The sub-backplates are disposed on the other side of the battery pack, and the gap between two connected sub-backplates corresponds to the gap between two adjacent frames.

7. The solar panel according to any one of claims 1 to 6, characterized in that, Also includes: Multiple isolation strips are disposed between the electrical connection assembly and the battery layer to isolate the electrical connection assembly and the battery layer; The isolation strip includes: An isolation layer is disposed on one side of the electrical connection assembly; An adhesive film layer is disposed on one side of the battery layer.

8. The solar panel according to claim 7, characterized in that, The frame has a thickness of H1, the battery layer has a thickness of H2, the electrical connection assembly has a thickness of H3, and the insulating strip has a thickness of H4, wherein H1 ≥ H2 + H3 + H4; and / or The distance from the battery layer to the frame is L1, where 2mm ≤ L1 ≤ 4mm; and / or The frame includes one of: an epoxy fiberglass frame, a polyurethane fiberglass frame, and a carbon fiber frame; and / or The thickness of the front plate is H5, 0.2mm≤H5≤0.4mm; and / or The light transmittance of the front panel is greater than or equal to 90%; and / or The thickness of the back plate is H6, 0.4mm ≤ H6 ≤ 0.8mm; and / or The back panel has a light transmittance of 86% or higher.

9. The solar panel according to any one of claims 1 to 6, characterized in that, Also includes: A first weather-resistant film is disposed on the side of the front panel away from the battery layer; A third adhesive film is disposed between the first weather-resistant film and the front panel; A second weather-resistant film is disposed on the side of the back sheet away from the battery layer; A fourth adhesive film is disposed between the second weather-resistant film and the backing plate.

10. A photovoltaic system, characterized in that, include: The solar panel as described in any one of claims 1 to 9.

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