Photovoltaic module and photovoltaic power generation system

Abstract

The utility model discloses a photovoltaic module and a photovoltaic power generation system. The photovoltaic module comprises a back plate, a plurality of battery pieces and a front plate, the back plate is a flexible plate, the plurality of battery pieces are arranged on the back plate, the front plate is located on one side, deviating from the back plate, of the battery pieces, the front plate is in one-to-one correspondence with the battery pieces, the front plate is of a plate-shaped structure, and in a plane perpendicular to the thickness of the front plate, the thickness of the front plate is larger than that of the battery pieces. And the projection of the battery piece in the plane is located in the projection range of the corresponding front plate in the plane. According to the photovoltaic module, the number of the battery pieces and the number of the front plates are both designed to be multiple, and the projections of the battery pieces are located in the projection range of the front plates, so that it is guaranteed that the front plates completely cover the corresponding battery pieces one by one, the front plates can comprehensively protect the battery pieces, and meanwhile the bending performance of the photovoltaic module is improved; and the photovoltaic module can be flexibly bent, so that various application scenes can be met.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic power generation systems, and in particular to a photovoltaic module and a photovoltaic power generation system having the photovoltaic module. Background Art

[0002] In related technologies, photovoltaic modules include a backplane, battery cells and a front panel. The battery cells are arranged on the backplane, and the front panel is arranged on the battery cells. However, the front panels of currently common photovoltaic modules do not provide good protection for the battery cells, and the bending performance of photovoltaic modules is poor, which cannot meet flexible application scenarios. Utility Model Content

[0003] The present application aims to solve at least one of the above-mentioned technical problems in the prior art to a certain extent. To this end, the present application proposes a photovoltaic module that can be flexibly bent while the front panel fully protects the solar cells.

[0004] The present application also proposes a photovoltaic power generation system having the above photovoltaic assembly.

[0005] According to the embodiment of the present application, the photovoltaic module includes: a backplane, a battery cell and a front plane, the backplane is a flexible plate, the battery cell is multiple, and the multiple battery cells are arranged on the backplane, the front plane is located on the side of the battery cell away from the backplane, the front plane corresponds to the battery cell one-to-one, and the front plane is a plate-like structure. In a plane perpendicular to the thickness of the front plane, the projection of the battery cell in the plane is located within the projection range of the corresponding front plate in the plane.

[0006] According to the photovoltaic module of the embodiment of the present application, by designing both the battery cell and the front panel into multiple, the projection of the battery cell is located within the projection range of the front panel to ensure that the front panel completely covers the corresponding battery cell one by one, so that the front panel can fully protect the battery cell, and at the same time improve the bending performance of the photovoltaic module, so that the photovoltaic module can be flexibly bent, thereby meeting a variety of application scenarios.

[0007] In some embodiments, in any direction within the plane, the projection of the front plate within the plane is 3 mm to 12 mm larger than the projection of the battery cell within the plane.

[0008] In some embodiments, the photovoltaic module further includes a first adhesive film layer, the first adhesive film layer is located between the battery cell and the back plate, and the first adhesive film layer bonds the battery cell and the back plate.

[0009] In some embodiments, the photovoltaic module further includes a second adhesive film layer, and the second adhesive film layer bonds the front plate and the solar cell.

[0010] In some embodiments, the photovoltaic module further includes a surface layer, which is located on a side of the front plate facing away from the solar cell, and all projections of the front plate on the back plate are within the projection range of the surface layer on the back plate.

[0011] In some embodiments, the photovoltaic module further includes a third adhesive film layer, the third adhesive film layer is located between the surface layer and the front plate, and the third adhesive film layer bonds the surface layer and the front plate.

[0012] In some embodiments, the surface layer is bonded to the front plate, and the photovoltaic module further includes a second adhesive film layer, which bonds the front plate and the solar cell, and also bonds the surface layer.

[0013] In some embodiments, the front panel is a polymer resin panel, a tempered glass panel, or a polymer plus glass fiber composite panel, and the cell is a crystalline silicon cell.

[0014] In some embodiments, the back plate has a wiring groove, and the photovoltaic module further includes a wire, the wire is used to connect the solar cells, and the wire is at least partially located in the wiring groove;

[0015] In which, the backplane has a first side facing the battery cell and a second side facing away from the battery cell, the wiring groove is an internal groove arranged between the first side and the second side, or the wiring groove is an open groove arranged on the first side, and the groove is suitable for pouring sealant.

[0016] According to another embodiment of the present application, a photovoltaic power generation system includes the above-mentioned photovoltaic assembly, and the front plate is a hard transparent plate.

[0017] According to the photovoltaic power generation system of the embodiment of the present application, its photovoltaic module is designed to be multiple in number with the projection of the cell and the front panel, so that the projection of the cell is within the projection range of the front panel to ensure that the front panel completely covers the corresponding cell one by one, so that the front panel can fully protect the cell. At the same time, the bending performance of the photovoltaic module is improved, so that the photovoltaic module can be flexibly bent, thereby meeting a variety of application scenarios.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an exploded front view of a photovoltaic assembly according to an embodiment;

[0020] Figure 2 is an exploded front view of a photovoltaic module according to another embodiment;

[0021] Figure 3 is an exploded front view of a photovoltaic module according to another embodiment;

[0022] Figure 4 is an exploded front view of a photovoltaic module according to another embodiment;

[0023] Figure 5 is a schematic diagram of the shape of a front plate and a battery cell according to an embodiment;

[0024] Figure 6 is a schematic diagram of the shape of a front plate and a battery cell according to another embodiment;

[0025] Figure 7 is a schematic diagram of the shape of a front plate and a battery cell according to another embodiment;

[0026] Figure 8 is a schematic diagram of the shape of the front plate and battery cell of another embodiment;

[0027] Figure 9 is an exploded perspective schematic diagram of a photovoltaic module according to an embodiment;

[0028] Figure 10 is an exploded perspective schematic diagram of a photovoltaic module according to another embodiment;

[0029] Figure 11 It is a schematic diagram of the bending state of the photovoltaic module;

[0030] Figure 12 It is a schematic diagram of the electrical connection of multiple battery cells.

[0031] Reference numerals:

[0032] Photovoltaic module 10, back sheet 1, first side surface 11, second side surface 12, first adhesive film layer 2, solar cell 3, second adhesive film layer 4, second adhesive film layer body 41, second adhesive film layer protrusion 42, front sheet 5, surface layer 6, third adhesive film layer 7. DETAILED DESCRIPTION

[0033] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0034] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0035] The following combination Figures 1-12 The photovoltaic module 10 according to this embodiment and the photovoltaic power generation system having the photovoltaic module 10 are described in detail.

[0036] Reference Figure 1-Figure 4 、 Figure 9-10 As shown, the photovoltaic assembly 10 according to an embodiment of the present application includes a backsheet 1 , a cell 3 and a frontsheet 5 .

[0037] The back panel 1 is a flexible panel, so the back panel 1 can be bent at will, for example, in one direction or in multiple directions.

[0038] The back plate 1 is a whole plate, and there are multiple battery cells 3. The multiple battery cells 3 are arranged on the back plate 1, and the front plate 5 is located on the side of the battery cells 3 away from the back plate 1. Figure 1-Figure 4 、 Figure 9-10 As shown, the front plate 5 is located above the battery cells 3, thereby protecting the upper surface of the battery cells 3 and preventing the upper surface of the battery cells 3 from being exposed. The front plate 5 corresponds one-to-one with the battery cells 3. The front plate 5 has a plate-like structure. In a plane perpendicular to the thickness of the front plate 5, the projection of the battery cell 3 on this plane is within the projection range of the corresponding front plate 5 on this plane. In other words, the front plate 5 completely covers the corresponding battery cell 3. In this way, the front plate 5 can fully protect the battery cell 3 and prevent the battery cell 3 from being exposed and causing damage or leakage.

[0039] The thickness direction of the front plate 5 is Figure 1-Figure 4 The up and down direction in the vertical direction is perpendicular to the plane of the thickness of the front plate 5. Figure 1-Figure 4 The horizontal plane in .

[0040] In addition, the battery cell 3 is not a whole-piece structure, but is divided into multiple battery cells 3, and then the front plate 5 is made to correspond one to one with the battery cell 3. In this way, the gap between two adjacent battery cells 3 and the gap between two adjacent front plates 5 provide space for the bending of the back plate 1, so that the bending performance of the photovoltaic module 10 is improved, and the photovoltaic module 10 can be flexibly bent.

[0041] Figure 11 The photovoltaic module 10 is shown in one form after bending. In other optional embodiments, the photovoltaic module 10 can also be bent in more directions. For example, when the front panel 5 and the battery cell 3 are assembled in the following manner: Figure 5 and Figure 6 While in the honeycomb shape shown, the photovoltaic module 10 can be bent into a spherical structure.

[0042] The surface of the backsheet 1 facing the battery cells 3 is the first side surface 11. When the backsheet 1 is in an unbent state, the first side surface 11 is flat, and the projection of the battery cells 3 on the first side surface 11 is within the projection range of the corresponding front panel 5 on the first side surface 11. In other words, when the backsheet 1 is in an unbent state, the backsheet 1 is a flat plate, and the projection of the battery cells 3 on the backsheet 1 is within the projection range of the corresponding front panel 5 on the backsheet 1. When the backsheet 1 is bent, the front panel 5 still maintains its position of covering the battery cells 3.

[0043] In related art, some front panels are made of a single piece. Due to the rigidity of the front panel, the bending performance of the photovoltaic module is poor. According to the photovoltaic module 10 of the embodiment of the present application, by designing both the cell 3 and the front panel 5 to be multiple, the projection of the cell 3 is located within the projection range of the front panel 5, so as to ensure that the front panel 5 completely covers the corresponding cell 3 one by one, so that the front panel 5 can fully protect the cell 3. At the same time, the bending performance of the photovoltaic module 10 is improved, making it flexible and able to meet various application scenarios.

[0044] In some embodiments, the plurality of battery cells 3 are separated from each other, and the front plate 5 covers the corresponding battery cell 3, and the plurality of front plates 5 do not overlap, that is, the plurality of front plates 5 are separated from each other, or as shown in FIG. Figure 5-Figure 8 As shown, at least two adjacent front panels 5 are adjacent to each other. The gap between the two adjacent front panels 5 provides space for the back panel 1 to bend, improving the bending performance of the photovoltaic module 10, allowing the photovoltaic module 10 to be flexibly bent to meet various application scenarios.

[0045] In some embodiments, for a plane perpendicular to the thickness of the front panel 5, in any direction within the plane, the projection of the front panel 5 within the plane is 3 mm to 12 mm larger than the projection of the battery cell 3 within the plane. In other words, in any direction within the plane, the difference between the projection of the front panel 5 within the plane and the projection of the battery cell 3 within the plane is 3 mm to 12 mm. When the difference between the projection of the front panel 5 within the plane and the projection of the battery cell 3 within the plane is less than 3 mm, the front panel 5 provides poor protection for the battery cell 3. When the difference between the projection of the front panel 5 within the plane and the projection of the battery cell 3 within the plane is greater than 12 mm, the size difference between the front panel 5 and the battery cell 3 is significant, resulting in waste of material for the front panel 5. Limiting the difference between the projection of the front panel 5 within the plane and the projection of the battery cell 3 within the plane to 3 mm to 12 mm can ensure that the front panel 5 provides better protection for the battery cell 3 without excessive waste of material for the front panel 5.

[0046] For example, in a plane perpendicular to the thickness of the front panel 5, in a first direction within the plane, the projection of the front panel 5 within the plane is larger than the projection of the battery cell 3 within the plane by 3mm, 5mm, 7mm, 9mm, 12mm, etc.; in a second direction within the plane, the projection of the front panel 5 within the plane is larger than the projection of the battery cell 3 within the plane by 3mm, 5mm, 6mm, 8mm, 10mm, 11mm, 12mm, etc.; and in a third direction within the plane, the projection of the front panel 5 within the plane is larger than the projection of the battery cell 3 within the plane by 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, etc. The first, second, and third directions are different directions. Of course, in other directions within the plane, the projection of the front panel 5 within the plane is also larger than the projection of the battery cell 3 within the plane by 3mm-12mm, which are not listed here.

[0047] In some embodiments, the plurality of battery cells 3 are in the shape of a circle, an ellipse, a polygon, or a combination thereof.

[0048] For example, Figure 5 、 Figure 9 and Figure 11 The front plate 5 and the battery cell 3 shown are both circular, and the difference between the radius of the front plate 5 and the radius of the battery cell 3 is L1, 3mm≤L1≤12mm.

[0049] Figure 6 and Figure 10 The front plate 5 and the battery cell 3 shown are both quadrilaterals. The distance between the first side of the front plate 5 and the first side of the battery cell 3 is L2, 3mm≤L2≤12mm, and the distance between the second side of the front plate 5 and the second side of the battery cell 3 is L3, 3mm≤L3≤12mm. Optionally, the front plate 5 and the battery cell 3 can both be square or rectangular. In this way, the structure of the front plate 5 and the battery cell 3 is simple and easy to cut and form.

[0050] Figure 7 The front plate 5 and the battery cell 3 shown are both pentagonal, and the distance between the side of the front plate 5 and the side of the battery cell 3 is L4, 3mm≤L4≤12mm.

[0051] Figure 8 The front plate 5 and the battery cell 3 shown are both hexagonal, and the distance between the first side edge of the front plate 5 and the first side edge of the battery cell 3 is L5, 3mm≤L5≤12mm.

[0052] Optionally, any one of L1, L2, L3, L4, and L5 can be 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, etc., or other values ​​within the range of 3mm-12mm, which are not listed here one by one.

[0053] In some embodiments, reference Figure 1-Figure 4 、 Figure 9-10 As shown, the photovoltaic module 10 also includes a first adhesive film layer 2, which is positioned between the cell 3 and the backsheet 1. The first adhesive film layer 2 adheres the cell 3 and the backsheet 1. When assembling the photovoltaic module 10, the first adhesive film layer 2 can be formed by directly applying adhesive, or the first adhesive film layer 2 can be first sandwiched between the cell 3 and the backsheet 1 and then at least partially melted through a thermoforming process to bond the cell 3 and the backsheet 1. The provision of the first adhesive film layer 2 securely secures the cell 3 to the first side surface 11 of the backsheet 1, preventing the cell 3 from falling off the backsheet 1. The overall structure of the photovoltaic module 10 is more stable and less susceptible to damage.

[0054] Optionally, the first adhesive film layer 2 may be a whole piece structure, such as Figure 1 、 Figure 3-Figure 4 As shown; the first film layer 2 can also be a small block structure corresponding to the battery cell 3, such as Figure 2 shown.

[0055] In some embodiments, reference Figure 1-Figure 4 、 Figure 9-10 As shown, the photovoltaic module 10 also includes a second adhesive film layer 4, which bonds the front panel 5 to the cell 3. During assembly of the photovoltaic module 10, the second adhesive film layer 4 can be formed by direct adhesive coating, or by first sandwiching the second adhesive film layer 4 between the front panel 5 and the cell 3 and then at least partially melting the second adhesive film layer 4 through a thermoforming process to bond the front panel 5 and the cell 3. The provision of the second adhesive film layer 4 securely secures the front panel 5 to the cell 3, making it less likely for the front panel 5 to fall off the cell 3. This provides a more stable and less damage-resistant overall structure for the photovoltaic module 10.

[0056] Optionally, the second adhesive film layer 4 can be a whole piece structure, such as Figure 1 、 Figure 3-Figure 4 As shown; the second film layer 4 can also be a small block structure corresponding to the front plate 5 and the battery cell 3, such as Figure 2 shown.

[0057] In some embodiments, the photovoltaic module 10 further includes a surface layer 6, which is located on the side of the front plate 5 facing away from the solar cell 3. Figure 1-Figure 4 、 Figure 9-10 As shown, the surface layer 6 is located above the front plate 5. All projections of the front plate 5 on the back plate 1 are within the projection range of the surface layer 6 on the back plate 1. In this way, the surface layer 6 can encapsulate the front plate 5, protect the front plate 5, and prevent the front plate 5 from being exposed and damaged.

[0058] Optionally, the surface layer 6 may be a whole plate, or a small plate corresponding one-to-one to the front plate 5 .

[0059] In some embodiments, reference Figure 7 As shown, the photovoltaic module 10 further includes a third adhesive film layer 7, which is positioned between the surface layer 6 and the front panel 5. The third adhesive film layer 7 adheres the surface layer 6 and the front panel 5. When assembling the photovoltaic module 10, the third adhesive film layer 7 can be formed by directly applying adhesive, or the third adhesive film layer 7 can be first sandwiched between the surface layer 6 and the front panel 5 and then at least partially melted through a thermoforming process to adhere the surface layer 6 and the front panel 5. The provision of the third adhesive film layer 7 allows the surface layer 6 to be securely fixed to the front panel 5, making it less likely for the surface layer 6 to fall off the front panel 5. The overall structure of the photovoltaic module 10 is more stable and less susceptible to damage.

[0060] Optionally, the third adhesive film layer 7 may be a whole structure, or a small structure corresponding one-to-one to the front plate 5 .

[0061] In some embodiments, reference Figure 7 As shown, the photovoltaic module 10 has a seven-layer structure, specifically a backsheet 1, a first adhesive film layer 2, solar cells 3, a second adhesive film layer 4, a frontsheet 5, a third adhesive film layer 7, and a surface layer 6. During the manufacturing process of the photovoltaic module 10 of this embodiment, the backsheet 1 is first laid flat, followed by the first adhesive film layer 2, then the solar cells 3, and then the second adhesive film layer 4. Subsequently, the frontsheet 5 is laid corresponding to the solar cells 3, followed by the third adhesive film layer 7, and finally the surface layer 6.

[0062] In some embodiments, the surface layer 6 is bonded to the front plate 5, and the photovoltaic module 10 further includes a second adhesive film layer 4, which bonds the front plate 5 and the cell 3, and also bonds the surface layer 6. Figure 4 As shown, the second adhesive film layer 4 can pass over the front plate 5 from the gap beside the front plate 5 and connect to the surface layer 6. In this way, there is no need to add a new adhesive film layer between the surface layer 6 and the front plate 5, which is beneficial to saving the cost of the photovoltaic module 10.

[0063] Specifically, if Figure 4 As shown, the second film layer 4 includes a second film layer body 41 and a second film layer protrusion 42. The second film layer protrusion 42 is connected to the second film layer body 41. The second film layer protrusion 42 protrudes toward the surface layer 6 relative to the second film layer body 41. The second film layer body 41 is located between the front plate 5 and the battery cell 3 to bond the front plate 5 and the battery cell 3. The second film layer protrusion 42 passes over the front plate 5 from the side gap of the front plate 5 and connects to the surface layer 6.

[0064] Optionally, the second film layer protrusion 42 may be one or more, for example Figure 4FIG3 shows three second adhesive film layer protrusions 42. In some embodiments not shown in the figures, the number of the second adhesive film layer protrusions 42 may be two, four, five or more.

[0065] In some embodiments, reference Figure 4 As shown, the photovoltaic module 10 has a six-layer structure, specifically a backsheet 1, a first adhesive film layer 2, solar cells 3, a second adhesive film layer 4, a frontsheet 5, and a surface layer 6. During the manufacturing process of the photovoltaic module 10 of this embodiment, the backsheet 1 is first laid flat, followed by the first adhesive film layer 2, then the solar cells 3, and then the second adhesive film layer 4. The frontsheet 5 is then laid one-to-one with the solar cells 3, and finally the surface layer 6 is laid.

[0066] In some embodiments, the front panel 5 is a polymer resin panel, a tempered glass panel, or a polymer and glass fiber composite panel.

[0067] For example, the front panel 5 may be made of a polymer resin material such as PMMA (Polymeric Methyl Methacrylate), PC (Polycarbonate), ABS (Acrylonitrile Butadiene Styrene), or transparent PP (Polypropylene), or an inorganic material such as chemically tempered glass, or a composite material such as a polymer plus glass fiber.

[0068] In some embodiments, the cell 3 is a crystalline silicon cell, which is applicable to all P-type and N-type single crystal and polycrystalline cells.

[0069] In some embodiments, the surface layer 6 may be made of a polymer material such as PET (Polyethylene Glycol Terephthalate) or PVDF (Polyvinylidene Difluoride).

[0070] In some embodiments, the front plate 5 is a hard, transparent plate, which facilitates the absorption of light by the cells 3 and allows for intuitive viewing of the cells 3. Any abnormalities in the cells 3 can be detected promptly, thereby improving the safety of the photovoltaic module 10. Furthermore, the front plate 5 is relatively hard, providing better protection for the cells 3.

[0071] In some embodiments, the surface layer 6 and the front plate 5 are both transparent plates, which makes it easier for the cell 3 to absorb light. At the same time, the cell 3 can be seen intuitively, and when an abnormality occurs in the cell 3, it can be discovered in time, which is beneficial to improving the safety of the photovoltaic module 10.

[0072] In some embodiments, the back plate 1 has a first side surface 11 and a second side surface 12, wherein the first side surface 11 is a surface facing the battery cell 3, and the second side surface 12 is a surface facing away from the battery cell 3. Figure 1-Figure 4 As shown, the first side 11 is the upper surface of the backsheet 1, and the second side 12 is the lower surface of the backsheet 1. The backsheet 1 has a wiring groove, and the photovoltaic module 10 also includes a wire for connecting the solar cells 3, and the wire is at least partially located in the wiring groove.

[0073] Optionally, the wire is a flexible wire, so that when the back plate 1 bends, the wire can bend along with the back plate 1 to prevent the wire from breaking.

[0074] In some embodiments, the wiring groove is an internal groove provided between the first side surface 11 and the second side surface 12. Thus, the wires pass through the internal groove and cannot be seen on the first side surface 11 and the second side surface 12, thus hiding the wires. Furthermore, the wires will not interfere with the solar cells 3 on the first side surface 11, thereby making more efficient use of the space in the photovoltaic module 10.

[0075] In other embodiments, the wiring trough is a slot provided on the first side surface 11, and the slot is suitable for injecting sealant. Specifically, after the wires are embedded in the slots, sealant is injected into the slots. After the sealant cures, it can cover the wires. As a result, the wires are not exposed on the first side surface 11, thus achieving the desired fixation and protection. At the same time, the wires will not interfere with the solar cells 3 on the first side surface 11, making better use of the space in the photovoltaic module 10.

[0076] In some embodiments, multiple battery cells 3 are arranged in multiple rows and columns, with the battery cells 3 in each column connected in series and the battery cells 3 in multiple columns connected in parallel. Figure 9 and Figure 12 In the example, multiple cells 3 are arranged in a matrix, with cells 3 arranged in three columns. The cells 3 in column A are connected in series, the cells 3 in column B are connected in series, and the cells 3 in column C are connected in series. The cells 3 in column A, the cells 3 in column B, and the cells 3 in column C are then connected in parallel. The parallel connection can reduce light loss and improve power generation efficiency.

[0077] Optionally, the conductor can be a flexible bus bar. The bus bar collects the current generated by the battery cells 3. The battery cells 3 can be electrically connected in series and then in parallel through the bus bar. Figure 9 and Figure 12 In some embodiments, each cell 3 can be directly connected in parallel. The direct single or multiple parallel connection between the cells 3 can increase the power generation.

[0078] The photovoltaic module 10 of this embodiment can realize the bending of a single curved surface, a double curved surface or multiple curved surfaces of the product, and has good impact resistance while also having the bendability and lightness of a flexible module.

[0079] A photovoltaic power generation system according to another embodiment of the present application includes the photovoltaic assembly 10 of the above embodiment.

[0080] According to the photovoltaic power generation system of another embodiment of the present application, its photovoltaic module 10 is designed to be multiple battery cells 3 and front panels 5, and the projection of the battery cells 3 is located within the projection range of the front panel 5 to ensure that the front panel 5 completely covers the corresponding battery cells 3 one by one, so that the front panel can fully protect the battery cells. At the same time, the bending performance of the photovoltaic module 10 is improved, so that the photovoltaic module 10 can be flexibly bent, thereby meeting a variety of application scenarios.

[0081] In the description of this application, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0082] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0083] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0084] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A photovoltaic module (10), characterized in that: include: A backboard (1), wherein the backboard (1) is a flexible board; A plurality of battery cells (3), wherein the plurality of battery cells (3) are arranged on the back plate (1); A front plate (5), the front plate (5) being located on a side of the battery cell (3) facing away from the back plate (1), the front plate (5) corresponding to the battery cell (3) on a one-to-one basis, the front plate (5) being a plate-shaped structure, and in a plane perpendicular to the thickness of the front plate (5), the projection of the battery cell (3) on the plane is located within a corresponding projection range of the front plate (5) on the plane.

2. The photovoltaic module (10) according to claim 1, characterized in that In any direction within the plane, the projection of the front plate (5) within the plane is 3 mm to 12 mm larger than the projection of the battery cell (3) within the plane.

3. The photovoltaic module (10) according to claim 1, characterized in that The photovoltaic module (10) further comprises a first adhesive film layer (2), wherein the first adhesive film layer (2) is located between the battery cell (3) and the back plate (1), and the first adhesive film layer (2) adheres the battery cell (3) and the back plate (1).

4. The photovoltaic module (10) according to claim 1, characterized in that The photovoltaic module (10) further comprises a second adhesive film layer (4), wherein the second adhesive film layer (4) bonds the front plate (5) and the battery cell (3).

5. The photovoltaic module (10) according to claim 1, characterized in that The photovoltaic assembly (10) further comprises a surface layer (6), the surface layer (6) being located on a side of the front plate (5) facing away from the cell sheet (3), and all projections of the front plate (5) on the back plate (1) being located within a projection range of the surface layer (6) on the back plate (1).

6. The photovoltaic assembly (10) according to claim 5, characterized in that The photovoltaic module (10) further comprises a third adhesive film layer (7), the third adhesive film layer (7) being located between the surface layer (6) and the front plate (5), and the third adhesive film layer (7) bonding the surface layer (6) and the front plate (5).

7. The photovoltaic assembly (10) according to claim 5, characterized in that The surface layer (6) is bonded to the front plate (5), and the photovoltaic module (10) further comprises a second adhesive film layer (4), wherein the second adhesive film layer (4) bonds the front plate (5) and the battery cell (3), and the second adhesive film layer (4) also bonds the surface layer (6).

8. The photovoltaic module (10) according to claim 1, characterized in that The front plate (5) is a polymer resin plate or a tempered glass plate or a polymer plus glass fiber composite plate, and the battery cell (3) is a crystalline silicon battery cell.

9. The photovoltaic module (10) according to claim 1, characterized in that The back plate (1) has a wiring groove, and the photovoltaic assembly (10) also includes a wire, the wire is used to connect the battery sheet (3), and the wire is at least partially located in the wiring groove; The back plate (1) has a first side surface (11) facing the battery cell (3) and a second side surface (12) facing away from the battery cell (3); the wiring groove is an internal groove arranged between the first side surface (11) and the second side surface (12); or the wiring groove is an open groove arranged on the first side surface (11), and the groove is suitable for pouring sealant.

10. A photovoltaic power generation system, characterized in that: The photovoltaic assembly (10) comprises any one of claims 1 to 9, wherein the front plate (5) is a hard transparent plate.

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