A solar photovoltaic panel

Abstract

The utility model discloses a solar photovoltaic panel, including first flexible layer, bottom plate layer, transparent second flexible layer, bottom plate layer includes the sub -board of a plurality of array settings, all sub -board set up in first flexible layer, and adjacent two sub -boards can switch between the state with the state of showing the angle of mutual coplanar, and each sub -board is provided with solar wafer on the side of deviating from first flexible layer, second flexible layer is located the side of solar wafer deviating from bottom plate, and all solar wafers and all sub -boards are encapsulated through first encapsulation layer between second flexible layer and first flexible layer. The solar photovoltaic panel provided by the utility model can effectively avoid the problem that some solar wafers crack due to stress deformation, and ensure product quality.

Description

Technical Field

[0001] This utility model relates to the field of solar power generation technology, and in particular to a solar photovoltaic panel. Background Technology

[0002] In traditional photovoltaic (PV) panels, a large number of solar cells are typically encapsulated on a large substrate, with the cells connected in series or parallel via circuitry on the substrate. However, this type of PV panel is prone to significant deformation under temperature changes or external forces (such as wind pressure or snow accumulation), which can cause some solar cells to crack. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a solar photovoltaic panel that can effectively avoid the problem of cracking of some solar cells due to stress deformation, thus ensuring product quality.

[0004] A solar photovoltaic panel according to an embodiment of the present invention includes a first flexible layer, a base plate layer, and a transparent second flexible layer. The base plate layer includes multiple sub-panels arranged in a row. All the sub-panels are disposed on the first flexible layer, and adjacent sub-panels can switch between being coplanar and being at an angle to each other. Each sub-panel has a solar cell disposed on the side facing away from the first flexible layer. The second flexible layer is located on the side of the solar cell facing away from the base plate. All the solar cells and all the sub-panels are encapsulated between the second flexible layer and the first flexible layer through a first encapsulation layer.

[0005] The solar photovoltaic panel according to the embodiments of this utility model has at least the following beneficial effects: The solar photovoltaic panel provided by this utility model divides the large base plate layer into multiple smaller sub-panels, and each sub-panel is equipped with solar cells. Each sub-panel is encapsulated between a first flexible layer and a second flexible layer. Thus, adjacent sub-panels can be bent relative to each other between a coplanar state and an angled state. Through the above arrangement, when the solar photovoltaic panel is deformed by external force, the external force mainly causes the adjacent sub-panels to change between a coplanar state and an angled state, while the deformation of the solar cells themselves is small, thereby avoiding the problem of solar cell cracking and ensuring product quality.

[0006] According to some embodiments of the present invention, there is a first interval between two adjacent sub-plates, and at least two solar cells are arranged on each sub-plate.

[0007] According to some embodiments of the present invention, one of the two opposite sides of the sub-plate is provided with at least one first groove and the other is provided with at least one second groove. The first groove and the second groove correspond one-to-one, so that the sub-plate is divided into at least two side-by-side and sequentially connected liner plates. The two adjacent liner plates can be bent relative to each other between a coplanar state and an angled state. Each liner plate is provided with one solar cell.

[0008] According to some embodiments of the present invention, the first flexible layer is fabric, and a portion of the first encapsulation layer is located between the first flexible layer and the sub-board.

[0009] According to some embodiments of the present invention, the sub-plate and the solar cells thereon are encapsulated into a sub-solar cell by a second encapsulation layer. In the sub-solar cell, the second encapsulation layer is partially located in the gap between the sub-plate and the solar cells and partially located in the gap between two adjacent solar cells. The first encapsulation layer encapsulates all the sub-solar cells between the first flexible layer and the second flexible layer.

[0010] According to some embodiments of the present invention, the second encapsulation layer avoids the surface of the solar cell facing the second flexible layer, and the first encapsulation layer is in contact with the surface of the solar cell facing the second flexible layer.

[0011] According to some embodiments of the present invention, the thermal conductivity of the second encapsulation layer is higher than that of the first encapsulation layer, the thermal conductivity of the first flexible layer is higher than that of the first encapsulation layer, a portion of the first encapsulation layer is located between the first flexible layer and the sub-board, and one of the sub-board and the first flexible layer is provided with a plurality of thermally conductive protrusions, and the other is in contact with the thermally conductive protrusions.

[0012] According to some embodiments of the present invention, the first encapsulation layer is EVA plastic, and the second encapsulation layer is thermally conductive silicone.

[0013] According to some embodiments of the present invention, the second flexible layer is a PET transparent film or an ETFE transparent film.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] 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:

[0016] Figure 1This is a cross-sectional view of a solar photovoltaic panel according to some embodiments of the present invention;

[0017] Figure 2 for Figure 1 The image shown is an enlarged view of the solar photovoltaic panel at point A.

[0018] Figure 3 for Figure 1 The image shown is an enlarged view of the solar photovoltaic panel at point B.

[0019] Figure 4 This is a schematic diagram of a sub-solar cell of a solar photovoltaic panel according to an embodiment of the present invention;

[0020] Figure 5 This is an external schematic diagram of a solar photovoltaic panel according to an embodiment of the present utility model;

[0021] Figure 6 This is a cross-sectional view of a solar photovoltaic panel according to other embodiments of the present invention;

[0022] Figure 7 for Figure 6 The enlarged view of the solar photovoltaic panel at point C is shown.

[0023] Figure label:

[0024] First flexible layer 100, thermally conductive protrusion 110, base plate layer 200, sub-plate 210, liner 210a, first groove 211, second groove 212, solar cell 300, second flexible layer 400, first encapsulation layer 500, second encapsulation layer encapsulation 600, first spacer 700, reflective film 800, sub-solar cell 900. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0028] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] Reference Figure 1 and Figure 5 According to an embodiment of the present invention, a solar photovoltaic panel includes a first flexible layer 100, a base plate layer 200, and a transparent second flexible layer 400. The base plate layer 200 includes multiple sub-plates 210 arranged in a row. All sub-plates 210 are disposed on the first flexible layer 100, and adjacent sub-plates 210 can switch between being coplanar and being at an angle to each other. Each sub-plate 210 has a solar cell 300 disposed on the side away from the first flexible layer 100. The second flexible layer 400 is located on the side of the solar cell 300 away from the base plate. The second flexible layer 400 and the first flexible layer 100 are encapsulated by a first encapsulation layer 500, which encapsulates all the solar cells 300 and all the sub-plates 210.

[0030] The solar photovoltaic panel provided by this utility model divides the large base plate layer 200 into multiple smaller sub-panels 210, and each sub-panel 210 is equipped with a solar cell 300. Each sub-panel 210 is encapsulated between a first flexible layer 100 and a second flexible layer 400. Thus, adjacent sub-panels 210 can be bent relative to each other between a coplanar state and an angled state. Through the above arrangement, when the solar photovoltaic panel is deformed by external force, the external force mainly causes the adjacent sub-panels 210 to change between a coplanar state and an angled state, while the solar cell 300 itself is subjected to less deformation, thereby avoiding the problem of cracking of the solar cell 300 and ensuring product quality.

[0031] Reference Figure 1 , Figure 2 and Figure 5 According to some embodiments of the present invention, there is a first interval 700 between two adjacent sub-plates 210 to increase the relative swing and bending angle range of the two adjacent sub-plates 210 and avoid severe collision and compression between the two adjacent sub-plates 210 during the deformation of the photovoltaic panel.

[0032] Reference Figure 1 and Figure 4 Each sub-panel 210 has at least two solar cells 300 arranged on it. In the specific production process, each sub-panel 210 and its solar cells 300 can be produced as a sub-solar cell 900. Finally, all sub-solar cell groups 900 are encapsulated together between the first flexible layer 100 and the second flexible layer 400. With the above configuration, when a solar cell 300 has a problem, it is possible to detect which sub-solar cell 900 has the problem more quickly. Then, only the corresponding sub-solar cell group 900 needs to be processed, avoiding the scrapping of the entire photovoltaic panel and reducing production costs.

[0033] Reference Figure 1 , Figure 3 and Figure 4 According to some embodiments of the present invention, one of the opposite sides of the sub-plate 210 is provided with at least one first groove 211 and the other is provided with at least one second groove 212. The first groove 211 and the second groove 212 correspond one-to-one, so that the sub-plate 210 is divided into at least two side-by-side and sequentially connected liner plates 210a. The two adjacent liner plates 210a can be bent relative to each other between a coplanar state and an angled state. Each liner plate 210a is provided with a solar cell 300. The liner plates 210a are made of rigid material. With the above configuration, the sub-plate 210 is formed by connecting the liner plates 210a whose size is adapted to the solar cell 300. Only one solar cell 300 is installed on each liner plate 210a. The liner plate 210a can support the solar cell 300 and improve the pressure resistance of a single solar cell 300. Therefore, when the photovoltaic panel as a whole deforms, in addition to the relative swing deformation between two adjacent sub-plates 210, the relative swing deformation between two adjacent liner plates 210a of the sub-plate 210 can also occur, making the deformation of each solar cell 300 itself smaller, thereby better protecting the solar cell 300.

[0034] Reference Figure 1 According to some embodiments of the present invention, the first flexible layer 100 is made of fabric to give the first flexible layer 100 better flexibility and cushioning performance. A portion of the first encapsulation layer 500 is located between the first flexible layer 100 and the sub-board 210 to seal between the first flexible layer 100 and the sub-board 210, thereby ensuring the overall sealing of the photovoltaic panel.

[0035] Reference Figure 1 , Figure 4According to some embodiments of the present invention, the sub-plate 210 and the solar cell 300 thereon are encapsulated into a sub-solar cell 900 by a second encapsulation layer 600. In the sub-solar cell 900, the second encapsulation layer 600 is partially located in the gap between the sub-plate 210 and the solar cell 300 and partially located in the gap between two adjacent solar cells 300. The first encapsulation layer 500 encapsulates all the sub-solar cells 900 between the first flexible layer 100 and the second flexible layer 400.

[0036] Reference Figure 5 In practical implementation, 2 to 6 solar cells 300 and sub-plates 210 can be encapsulated into sub-solar cells 900 through a second encapsulation layer 600. Then, according to the specifications of the photovoltaic panel product, multiple sub-solar cells 900 are further encapsulated between the first flexible layer 100 and the second flexible layer 400, thus forming a photovoltaic panel. This modular production method allows for the rapid assembly and production of photovoltaic panel products of different sizes using sub-solar cells 900, which can more effectively improve the production efficiency of photovoltaic panels in mass production. In addition, the main problems with photovoltaic panel products lie in the circuit soldering and encapsulation between the solar cells 300 and the sub-plates 210. In the production process of the photovoltaic panel provided by this utility model, the sub-solar cells 900 can be inspected before the final assembly to remove solar cells 300 with circuit soldering or encapsulation problems. Then, qualified sub-solar cells 900 are used to assemble the finished product, which helps to improve the overall yield of the photovoltaic panel product. In particular, if a solar cell 300 has a quality problem, only the corresponding sub-solar cell 900 needs to be scrapped or repaired, reducing production costs.

[0037] Reference Figure 1 , Figure 3 and Figure 4 According to some embodiments of the present invention, the second encapsulation layer 600 avoids the surface of the solar cell 300 facing the second flexible layer 400, and the first encapsulation layer 500 contacts the surface of the solar cell 300 facing the second flexible layer 400. With the above arrangement, the interface between the first encapsulation layer 500 and the second encapsulation layer 600 can be avoided from being located at the incident light position of the solar cell 300, thereby avoiding light loss caused by the interface between the first encapsulation layer 500 and the second encapsulation layer 600 and ensuring power generation efficiency.

[0038] Existing research shows that when the operating temperature of a photovoltaic panel increases, its power generation efficiency will decrease. Therefore, if a photovoltaic panel has good heat dissipation efficiency, it will be more conducive to its operation in high-temperature environments in summer.

[0039] Reference Figure 6 and Figure 7According to some embodiments of this utility model, the thermal conductivity of the second encapsulation layer 600 is higher than that of the first encapsulation layer 500, and the thermal conductivity of the first flexible layer 100 is higher than that of the first encapsulation layer 500. A portion of the first encapsulation layer 500 is located between the first flexible layer 100 and the sub-board 210. One of the sub-board 210 and the first flexible layer 100 is provided with multiple thermally conductive protrusions 110, and the other is in contact with the thermally conductive protrusions 110. With the above configuration, only the second encapsulation layer 600 needs to use a high-thermal-conductivity encapsulation material with higher cost, while the first encapsulation layer 500 can use a low-thermal-conductivity encapsulation material with lower cost, to ensure that the photovoltaic panel as a whole has good heat dissipation performance. Compared with the encapsulation method that uses high-thermal-conductivity encapsulation materials for all components, the encapsulation method provided by this utility model that only uses high-thermal-conductivity encapsulation materials for a portion can effectively save material costs.

[0040] In the specific implementation process, when the first flexible layer 100 is set as a heat-conducting fabric, the heat-conducting protrusions 110 can be set as metal protrusions, and these metal protrusions can be fixed to the heat-conducting fabric by riveting process.

[0041] In some embodiments, if it is necessary to further improve heat dissipation efficiency, mounting holes can be made in the heat-conducting protrusion 110, and heat-conducting pipes can be inserted into the mounting holes to significantly improve heat dissipation efficiency.

[0042] Reference Figure 6 and Figure 7 In some embodiments, a reflective structure can be provided at a first interval 700 between two adjacent sub-plates 210. This reflective structure is used to partially reflect light incident on the first interval 700 back onto the solar cell 300. Specifically, the reflective structure includes a reflective film 800 disposed on the edge of the sub-plate 210. The reflective film 800 is inclined at one end near the second flexible layer 400 to reflect light onto the solar cell 300, effectively increasing the effective illumination area of ​​the photovoltaic panel. A second interval exists between the two reflective films 800 between two adjacent sub-plates 210 to allow the first encapsulation layer 500 to fill the gap between the two reflective films 800.

[0043] According to some embodiments of this utility model, the first encapsulation layer 500 is EVA plastic, and the second encapsulation layer 600 is thermally conductive silicone. EVA plastic has a lower thermal conductivity than thermally conductive silicone, but its cost is lower. By adopting the above configuration, the amount of thermally conductive silicone used can be reduced while ensuring the heat dissipation performance of the photovoltaic product, thus controlling costs.

[0044] According to some embodiments of the present invention, the second flexible layer 400 is a PET transparent film or an ETFE transparent film, thereby the second flexible layer 400 has good flexibility and transparency.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A solar photovoltaic panel, characterized in that, include: First flexible layer (100); The base plate layer (200) includes multiple sub-plates (210) arranged in a row. All of the sub-plates (210) are disposed on the first flexible layer (100), and two adjacent sub-plates (210) can switch between being coplanar and being at an angle to each other. Each sub-plate (210) has a solar cell (300) disposed on the side away from the first flexible layer (100). A transparent second flexible layer (400) is located on the side of the solar cell (300) facing away from the substrate. The second flexible layer (400) and the first flexible layer (100) are encapsulated by a first encapsulation layer (500) for all the solar cells (300) and all the sub-boards (210).

2. A solar photovoltaic panel according to claim 1, characterized in that, There is a first interval (700) between two adjacent sub-plates (210), and at least two solar cells (300) are arranged on each sub-plate (210).

3. A solar photovoltaic panel according to claim 1, characterized in that, The sub-plate (210) has at least one first groove (211) on one of its two opposite sides and at least one second groove (212) on the other side. The first groove (211) and the second groove (212) correspond one-to-one, so that the sub-plate (210) is divided into at least two side-by-side and sequentially connected liner plates (210a). The two adjacent liner plates (210a) can be bent relative to each other between a coplanar state and an angled state. Each liner plate (210a) is provided with one solar cell (300).

4. A solar photovoltaic panel according to claim 1, characterized in that, The first flexible layer (100) is made of fabric, and a portion of the first encapsulation layer (500) is located between the first flexible layer (100) and the sub-board (210).

5. A solar photovoltaic panel according to claim 3, characterized in that, The sub-plate (210) and the solar cell (300) thereon are encapsulated into a sub-solar cell (900) by a second encapsulation layer (600). In the sub-solar cell (900), the second encapsulation layer (600) is partially located in the gap between the sub-plate (210) and the solar cell (300) and partially located in the gap between two adjacent solar cells (300). The first encapsulation layer (500) encapsulates all the sub-solar cells (900) between the first flexible layer (100) and the second flexible layer (400).

6. A solar photovoltaic panel according to claim 5, characterized in that, The second encapsulation layer (600) avoids the surface of the solar cell (300) facing the second flexible layer (400), and the first encapsulation layer (500) contacts the surface of the solar cell (300) facing the second flexible layer (400).

7. A solar photovoltaic panel according to claim 5, characterized in that, The thermal conductivity of the second encapsulation layer (600) is higher than that of the first encapsulation layer (500), the thermal conductivity of the first flexible layer (100) is higher than that of the first encapsulation layer (500), a portion of the first encapsulation layer (500) is located between the first flexible layer (100) and the sub-board (210), one of the sub-board (210) and the first flexible layer (100) is provided with a plurality of thermally conductive protrusions (110), and the other is in contact with the thermally conductive protrusions (110).

8. A solar photovoltaic panel according to claim 7, characterized in that, The first encapsulation layer (500) is EVA plastic, and the second encapsulation layer (600) is thermally conductive silicone.

9. A solar photovoltaic panel according to claim 1, characterized in that, The second flexible layer (400) is a PET transparent film or an ETFE transparent film.

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