Photovoltaic module and photovoltaic system
By connecting or partially overlapping solar cells in photovoltaic modules and controlling the ratio of cell strings to modules, the problem of low cell area ratio is solved, thereby improving the power generation efficiency of photovoltaic modules.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHUHAI FUSHAN AIKO SOLAR ENERGY TECH CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-01
AI Technical Summary
The low proportion of cell area in existing photovoltaic modules results in poor power generation efficiency.
By connecting or partially overlapping adjacent cells in each cell string, and controlling the ratio of the length of the cell string to the length of the photovoltaic module to be 97% to 99%, and controlling the ratio of the area of the cells on the front of the photovoltaic module to the total area to be 93% to 99%.
This increases the area of solar cells on the front of the photovoltaic module, thereby improving the power generation efficiency of the photovoltaic module.
Smart Images
Figure CN224192341U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic cell technology, and in particular to a photovoltaic module and a photovoltaic system. Background Technology
[0002] Solar cells, also known as photovoltaic cells, are devices that directly convert light energy into direct current using the photovoltaic effect. In related technologies, multiple solar cells are connected in series and then laminated and encapsulated to form a photovoltaic module. The resulting photovoltaic module typically includes a back glass, a first encapsulating film, a cell string, a second encapsulating film, and a front glass, which are stacked sequentially.
[0003] In related technologies, photovoltaic modules typically include multiple cell strings, each containing multiple cells arranged sequentially at intervals. There are usually gaps between adjacent cells in the cell string. The relationship between the length of the cell string and the length of the photovoltaic module is not considered, nor is the relationship between the area of the cells on the front of the photovoltaic module and the total area of the front of the photovoltaic module. This results in a low cell area ratio and poor power generation efficiency of the photovoltaic module. Utility Model Content
[0004] This invention provides a photovoltaic module that aims to solve the problems of low cell area ratio and poor power generation efficiency in existing photovoltaic modules.
[0005] This invention is implemented by providing a photovoltaic module, comprising:
[0006] Border; and
[0007] Multiple battery strings are arranged within the frame, each battery string including multiple battery cells arranged sequentially along the length direction of the photovoltaic module, adjacent battery cells in each battery string are connected to each other or partially overlap, the length direction of each battery string is the same as the length direction of the photovoltaic module, and the multiple battery strings are arranged sequentially along the width direction of the photovoltaic module.
[0008] The ratio of the length of the battery string to the length of the photovoltaic module is 97% to 99%, and the ratio of the projected area of all the cells of the photovoltaic module on the front of the photovoltaic module to the total area of the front of the photovoltaic module is 93% to 99%.
[0009] Preferably, the sum of the projected lengths of the battery cells in the same battery string along the length direction of the battery string is greater than the length of the battery string, and the ratio of the sum of the projected lengths of the battery cells in the battery string along the length direction of the battery string to the length of the battery string is 100% to 101%.
[0010] Preferably, the ratio of the sum of the projected lengths of the battery cells in the same battery string along the length direction of the battery string to the length of the battery string is 100% to 100.51%.
[0011] Preferably, the ratio of the length of the battery string to the length of the photovoltaic module is 97.5% to 98.7%.
[0012] Preferably, the ratio of the sum of the projected lengths of the cells in the battery string along the length direction of the battery string to the length of the photovoltaic module is 98% to 99.5%.
[0013] Preferably, the ratio of the area of the solar cells on the front side of the photovoltaic module to the total area of the front side of the photovoltaic module is 94% to 96%.
[0014] Preferably, the ratio of the area of the busbars exposed on the front of the photovoltaic module to the total area of the front of the photovoltaic module is 0.0015% to 0.025%.
[0015] Preferably, the ratio of the area of the busbars exposed on the front of the photovoltaic module to the total area of the front of the photovoltaic module is 0.002% to 0.02%.
[0016] Preferably, at least two adjacent battery strings have their battery cells connected together, or at least two adjacent battery strings have their battery cells partially overlapping.
[0017] Preferably, adjacent cells in the battery string overlap to form an overlapping region, and the projected length of the overlapping region in the longitudinal direction of the photovoltaic module is 0.1 to 0.5 mm.
[0018] Preferably, the adjacent battery strings are spaced apart, and the distance between two adjacent battery strings is 0.5 to 2.5 mm.
[0019] This utility model also provides a photovoltaic system, including the photovoltaic module described above.
[0020] This utility model provides a photovoltaic module by connecting adjacent cells in each cell string or partially overlapping adjacent cells in the cell string, and controlling the ratio of the length of the cell string to the length of the photovoltaic module to be 97% to 99%. Maintaining this ratio within a suitable range increases the proportion of the cell string length to the photovoltaic module length, thereby increasing the light-receiving area of the cell string and improving the power generation efficiency of a single cell string. Simultaneously, controlling the ratio of the area of the cells on the front of the photovoltaic module to the total area of the front of the photovoltaic module to be 93% to 99% maintains this ratio within an optimal range, increasing the proportion of the cell area in the total front area of the photovoltaic module, further increasing the light-receiving area of the cells on the front of the photovoltaic module, and thus improving the power generation efficiency of the photovoltaic module. Attached Figure Description
[0021] Figure 1 A plan view of a photovoltaic module provided for an embodiment of this utility model;
[0022] Figure 2 A plan view of another photovoltaic module provided in an embodiment of this utility model;
[0023] Figure 3 A cross-sectional schematic diagram of a photovoltaic module provided for an embodiment of this utility model;
[0024] Figure 4 A schematic diagram of a photovoltaic module's cell string provided in an embodiment of this utility model;
[0025] Figure 5 A cross-sectional schematic diagram of another photovoltaic module provided for an embodiment of this utility model;
[0026] Figure 6 A schematic diagram of a cell string for another photovoltaic module provided in an embodiment of this utility model;
[0027] Figure 7 for Figure 2 A magnified schematic diagram of part A in the middle. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Examples of 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 the present utility model, and should not be construed as limiting the present utility model. Furthermore, it should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.
[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "back", "front", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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.
[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0031] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.
[0032] Please refer to Figures 1-2 This utility model embodiment provides a photovoltaic module 100, comprising:
[0033] Border 1; and
[0034] Multiple battery strings 2 are arranged within the frame 1. Each battery string 2 includes multiple battery cells 21 arranged sequentially along the length direction Y of the photovoltaic module 100. Adjacent battery cells 21 in each battery string 2 are connected or partially overlap. The length direction of each battery string 2 is the same as the length direction Y of the photovoltaic module 100. Multiple battery strings 2 are arranged sequentially along the width direction X of the photovoltaic module 100.
[0035] The ratio of the length L3 of the battery string 2 to the length L1 of the photovoltaic module 100 is 97% to 99%, and the ratio of the projected area of all the battery cells 21 of the photovoltaic module 100 on the front side 101 of the photovoltaic module 100 to the total area of the front side 101 of the photovoltaic module 100 is 93% to 99%.
[0036] In this embodiment, the length L1 of the photovoltaic module 100 is specifically the length of the frame 1, and the width L2 of the photovoltaic module 100 is specifically the width of the frame 1. In this embodiment of the present invention, each battery string 2 is composed of all the battery cells 21 arranged sequentially along the length Y of the photovoltaic module 100. It can be understood that all the battery cells arranged in a column within the frame 1 form a battery string 2, that is, each battery string 2 extends from one end of the frame 1 to the other end of the frame 1. Figure 1 All the solar cells 21 contained within the dashed box form a solar cell string 2. Multiple solar cell strings 2 are arranged sequentially along the width direction X of the photovoltaic module 100. There may be gaps between adjacent solar cell strings 2, or there may be no gaps between adjacent solar cell strings 2, or some adjacent solar cell strings 2 may have gaps while others may not.
[0037] As an embodiment of this utility model, adjacent battery strings 2 are spaced apart, and the distance between two adjacent battery strings 2 is 0.5 to 2.5 mm. This makes the distance between battery strings 2 set within a reasonable range, so that the area ratio of the non-battery cell area is low. This is beneficial to increasing the area ratio of the battery cell 21 area on the front side 101 of the photovoltaic module 100, and thus improving the power generation efficiency of the photovoltaic module 100.
[0038] In this embodiment of the present invention, the front side 101 of the photovoltaic module 100 is the side facing sunlight when the photovoltaic module 100 is working, that is, the light-receiving side of the solar cell 21; the back side 102 of the photovoltaic module 100 is the side facing away from sunlight when the photovoltaic module 100 is working, that is, the back-lighting side of the solar cell 21. Specifically, adjacent solar cells 21 within each solar cell string 2 in this embodiment of the present invention refer to adjacent solar cells 21 along the length direction of the solar cell string 2.
[0039] like Figure 1 , Figure 3 and Figure 4As shown, adjacent cells 21 in each battery string 2 are connected in contact, meaning they are exactly touching. There are no gaps or overlaps between adjacent cells 21 within each battery string 2. This reduces the area ratio of non-cell regions in the photovoltaic module 100, increasing the proportion of cell 21 area in the total area of the front side 101 of the photovoltaic module 100, thus improving the power generation efficiency of the photovoltaic module 100. Furthermore, the absence of gaps between adjacent cells 21 in each battery string 2 improves the appearance of the front side of the photovoltaic module 100. In this embodiment, the sum of the projected lengths L5 of all cells 21 within each battery string 2 along the length direction of the battery string 2 is equal to the length L3 of the battery string 2.
[0040] like Figure 2 , Figure 5 and Figure 6 As shown, adjacent cells 21 of the battery string 2 can partially overlap. Since adjacent cells 21 of each battery string 2 overlap with each other, there are no gaps between adjacent cells 21, which can reduce the area of non-cell areas on the front of the photovoltaic module 100. This also helps to increase the proportion of cells 21 in the area of the front 101 of the photovoltaic module 100, which is beneficial to improving the power generation efficiency of the module. In addition, since there are no gaps between adjacent cells 21 of each battery string 2, it helps to improve the appearance of the front of the photovoltaic module 100.
[0041] Please refer to point 2 and... Figure 6 In this embodiment of the invention, each battery string 2 can be connected in series or in parallel to achieve current collection and output. For example, the current of each battery cell 21 can be collected by welding ribbon, and the battery strings 2 can be connected in series or in parallel by busbar 7. Each battery string 2 may include multiple battery cells 21 connected in series by welding ribbon, and adjacent battery strings 2 arranged along the width direction X of the photovoltaic module 100 are connected in series by busbar 7.
[0042] Of course, each battery string 2 may also include a first battery string unit and a second battery string unit arranged along the length Y of the photovoltaic module 100. The first battery string unit and the second battery string unit include a plurality of battery cells 21 arranged along the length Y of the photovoltaic module 100. The plurality of battery cells 21 of the first battery string unit and the second battery string unit are connected in series by solder strips. The first battery string unit and the second battery string unit are connected in parallel by a busbar 7 at the middle position. Adjacent first battery string units are connected in series by a busbar 7 near one edge of the photovoltaic module 100, and adjacent second battery string units are connected in series by a busbar 7 near the other edge of the photovoltaic module 100. The battery cells 21 may be back-contact solar cells or Topcon solar cells, etc., and there is no specific limitation here.
[0043] In this embodiment of the present invention, the photovoltaic module 100 further includes a first adhesive film 3 disposed on the back of the battery string 2, a back plate 4 disposed on the side of the first adhesive film 3 away from the battery string 2, a second adhesive film 5 disposed on the front of the battery string 2, and a front plate 6 disposed on the second adhesive film 5 away from the battery string 2. The battery string 2 is encapsulated between the first adhesive film 3 and the second adhesive film 5. The back plate 4, the first adhesive film 3, the battery string 2, the second adhesive film 5, and the front plate 6 are stacked sequentially to form a laminate. The frame 1 is disposed around the perimeter of the laminate.
[0044] In this embodiment of the present invention, a photovoltaic module 100 is provided by connecting adjacent cells 21 of each cell string 2 or partially overlapping adjacent cells 21 of each cell string 2, with no gaps between cells 21 within each cell string 2. This reduces the area of the non-cell-set area on the front 101 of the photovoltaic module 100, increases the area ratio of cells 21 on the front 101 of the photovoltaic module 100, and simultaneously controls the ratio of the length L3 of the cell string 2 to the length L1 of the photovoltaic module 100 to be 97% to 99%. By controlling the ratio of the length L3 of the cell string 2 to the length L1 of the photovoltaic module 100 within a suitable range, it is beneficial to increase the ratio of the length L3 of the cell string 2 to the length L1 of the photovoltaic module 100, increase the light-receiving area of the cell string 2, and improve the power generation rate of a single cell string 2, thereby increasing the power generation power of the photovoltaic module 100. Meanwhile, controlling the ratio of the area of the solar cells 21 on the front side 101 of the photovoltaic module 100 to the total area of the front side 101 of the photovoltaic module 100 to 93% to 99% ensures that the ratio is kept within a suitable range. This allows the ratio to be kept within a larger range, which is beneficial for increasing the light-receiving area of the solar cells 21 and improving the power generation efficiency of the photovoltaic module 100.
[0045] The area of the solar cells 21 on the front side 101 of the photovoltaic module 100 is the sum of the projected areas of all solar cells 21 in all solar strings 2 on the front side 101 of the photovoltaic module 100, which is the area of the solar cells 21 visible from the front side 101 of the photovoltaic module 100. The total area of the front side 101 of the photovoltaic module 100 is the product of the length L1 and the width L2 of the photovoltaic module 100. The front side 101 of the photovoltaic module 100 includes the solar cell area where solar cells 21 are installed and the non-solar cell area where solar cells 21 are not installed. The non-solar cell area includes the area where the frame 1 is located, the gaps between the solar strings 2, and the gap area between the solar strings 2 and the frame 1, etc. In other words, the area of the front side 101 of the photovoltaic module 100 excluding the solar cells 21 is the non-solar cell area. By controlling the ratio of the area of the solar cells 21 on the front side 101 of the photovoltaic module 100 to the total area of the front side 101 of the photovoltaic module 100 to 93% to 99%, that is, controlling the ratio of the area of the solar cell 21 region to the total area of the front side 101 of the photovoltaic module 100 to 93% to 99%, it can also be understood that the ratio of the area of the front side 101 of the photovoltaic module 100 without solar cells 21 to the total area of the front side 101 of the photovoltaic module 100 is controlled to 1% to 7%.
[0046] like Figure 6 As shown, in one embodiment of the present invention, the adjacent battery cells 21 of the battery string 2 overlap to form an overlapping area, and the projection length L4 of the overlapping area in the length direction Y of the photovoltaic module 100 is 0.1 to 0.5 mm.
[0047] In this embodiment, the projection length L4 of the overlapping area of adjacent cells 21 in the battery string 2 along the length Y direction of the photovoltaic module 100 is controlled to be 0.1 to 0.5 mm. This avoids the overlapping area L4 of adjacent cells 21 being too large or too small, thus achieving gapless spacing between adjacent cells 21 in the battery string 2, reducing the area of non-cell 21 regions on the front side 101 of the photovoltaic module 100, increasing the area ratio of cells 21 on the front side 101 of the photovoltaic module 100, and improving the power generation efficiency of the module. Moreover, it avoids the overlapping area of adjacent cells 21 being too large, thus ensuring a good power generation efficiency for each cell 21.
[0048] As an embodiment of the present invention, the sum of the projected lengths L5 of all the battery cells 21 in the same battery string 2 along the length direction of the battery string 2 is greater than the length L3 of the battery string 2, and the ratio of the sum of the projected lengths L5 of the battery cells 21 in the battery string 2 along the length direction of the battery string 2 to the length L3 of the battery string 2 is 100% to 101%.
[0049] In this embodiment, the ratio of the sum of the projected lengths L5 of all the cells 21 along the length direction of the battery string 2 to the length L3 of the battery string 2 is controlled to be 100% to 101%. This achieves a good ratio between the sum of the projected lengths L5 of the cells 21 along the length direction of the battery string 2 and the length L3 of the battery string 2, avoiding excessively large or small overlaps between adjacent cells 21. This helps to increase the area ratio of the cells 21 on the front side 101 of the photovoltaic module 100, thereby improving the power generation efficiency of the module and ensuring a good power generation efficiency for each cell 21.
[0050] In this configuration, the sum of the projected lengths L5 of the battery cells 21 along the length direction of the battery string 2 is the sum of the projected lengths L5 of all the battery cells 21 along the length direction of the battery string 2. For example, each battery string 2 includes M battery cells 21, and the projected length of each battery cell 21 along the length direction of the battery string 2 is L5. The sum of the projected lengths of all the battery cells 21 along the length direction of the battery string 2 is M*L5, and M*L5 is greater than the length L3 of the battery string 2.
[0051] As an embodiment of this utility model, the ratio of the sum of the projected lengths L5 of the battery cells 21 along the length direction of the battery string 2 to the length L3 of the battery string 2 is 100% to 100.51%.
[0052] In this embodiment, the ratio of the sum of the projected lengths L5 of the cells 21 in each battery string 2 along the length direction of the battery string 2 to the length L3 of the battery string 2 is controlled to be 100% to 100.51%. This can further increase the area ratio of the cells 21 on the front side 101 of the photovoltaic module 100, which is conducive to improving the power generation efficiency of the module and further ensuring the good power generation efficiency of each cell 21.
[0053] In one embodiment of this utility model, the ratio of the length L3 of the battery string 2 to the length L1 of the photovoltaic module 100 is 97.5% to 98.7%.
[0054] In this embodiment, the ratio of the length L3 of the battery string 2 to the length L1 of the photovoltaic module 100 is controlled to be 97.5% to 98.7%. Further optimizing the ratio of the length L3 of the battery string 2 to the length L1 of the photovoltaic module 100 is beneficial to increasing the light-receiving area of the battery string 2, which is beneficial to increasing the power generation rate of a single battery string 2, and thus further increasing the power generation of the photovoltaic module 100.
[0055] For example, the ratio of the length L3 of the battery string 2 to the length L1 of the photovoltaic module 100 can be any ratio among 97.5%, 97.78%, 98.2%, 98%, 98.38%, 98.67%, 98.36%, 98.68%, 98.43%, 98.73%, 98.69%, and 98.7%.
[0056] As an embodiment of the present invention, the ratio of the sum of the projected lengths of the battery cells 21 along the length direction of the battery string 2 to the length L1 of the photovoltaic module 100 is 98% to 99.5%.
[0057] In this embodiment, the ratio of the sum of the projected lengths of the battery cells 21 along the length direction of the battery string 2 to the length L1 of the photovoltaic module 100 is controlled to be 98% to 99.5%. This can further optimize the ratio of the sum of the projected lengths L5 of the battery cells 21 along the length direction of the battery string 2 to the length L1 of the photovoltaic module 100, which is beneficial to further increase the area ratio of the battery cells 21 of the battery string 2 on the front side 101 of the photovoltaic module 100, and thus improve the power generation efficiency of the module.
[0058] As an embodiment of the present invention, the ratio of the area of the cell 21 on the front side 101 of the photovoltaic module 100 to the total area of the front side 101 of the photovoltaic module 100 is 94% to 96%.
[0059] In this embodiment, the ratio of the area of the solar cells 21 on the front side 101 of the photovoltaic module 100 to the total area of the front side 101 of the photovoltaic module 100 is controlled to be 94% to 96%. This keeps the ratio within a suitable range, which allows the ratio of the solar cells 21 to the total area of the front side 101 of the photovoltaic module 100 to be kept within a large range. This is beneficial for increasing the light-receiving area of the solar cells 21 and improving the power generation efficiency of the photovoltaic module 100. At the same time, it keeps the area of the non-solar cell 21 area on the front side 101 of the photovoltaic module 100 within 4% to 6%, which is beneficial for the processing and manufacturing of the photovoltaic module 100.
[0060] For example, the ratio of the area of the solar cell 21 on the front side 101 of the photovoltaic module 100 to the total area of the front side 101 of the photovoltaic module 100 can be any ratio among 94%, 94.3%, 94.5%, 94.7%, 94.9%, 95%, 95.1%, 95.5%, 95.7%, 95.8%, and 96%.
[0061] As an embodiment of the present invention, the ratio of the area of the busbar 7 exposed on the front side of the photovoltaic module 100 to the total area of the front side 101 of the photovoltaic module 100 is 0.0015% to 0.025%.
[0062] In this embodiment, the area of the busbar 7 exposed on the front side 101 of the photovoltaic module 100 is the sum of the areas of all busbars 7 visible from the front side 101 of the photovoltaic module 100, that is, the sum of the areas of the busbars 7 at the edge of the photovoltaic module 100 and the busbars 7 at the middle of the photovoltaic module 100 exposed on the front side 101 of the photovoltaic module 100. Adjacent cell strings 2 are connected in series or parallel via the busbars 7, which are hidden on the back of the cell 21. When a cell string gap 20 is provided between adjacent cell strings 2, a portion of the area of the busbar 7 will be exposed in the cell string gap 20. Therefore, the ratio of the area of the exposed busbars 7 on the front side 101 of the photovoltaic module 100 to the total area of the front side of the photovoltaic module 100 is controlled to be 0.0015% to 0.025%. This results in a lower proportion of the exposed busbar area on the front side 101 of the photovoltaic module 100, which is beneficial for increasing the light-receiving area of the solar cells 21 on the front side 101 of the photovoltaic module 100 and makes the appearance of the front side 101 of the photovoltaic module 100 more aesthetically pleasing. The specific placement of the busbars 7 is not limited. For example, the busbars 7 at the edge can be placed on the back of the first solar cell 21 closest to the end of the solar cell 2 in the solar cell string 2, or they can be hidden on the back of the second solar cell 21 closest to the end of the solar cell 2 in the solar cell string 2; the busbars 7 in the middle can be hidden on the back of the solar cell 21 in the middle of the solar cell string 2.
[0063] As an embodiment of the present invention, the ratio of the area of the busbar 7 exposed on the front side of the photovoltaic module 100 to the total area of the front side 101 of the photovoltaic module 100 is 0.002% to 0.02%.
[0064] In this embodiment, the ratio of the area of the busbar 7 exposed on the front side of the photovoltaic module 100 to the total area of the front side of the photovoltaic module 100 is controlled to be 0.002% to 0.02%. This further optimizes the area ratio of the busbar 7 exposed on the front side 101 of the photovoltaic module 100, reduces the area ratio of the busbar 7 exposed on the front side 101 of the photovoltaic module 100, and helps to further increase the light-receiving area of the solar cells 21 on the front side 101 of the photovoltaic module 100.
[0065] For example, the ratio of the area of the busbar exposed on the front of the photovoltaic module 100 to the total area of the front side 101 of the photovoltaic module 100 can be any ratio among 0.002%, 0.0022%, 0.0025%, 0.0035%, 0.0032%, 0.0026%, 0.0176%, 0.0158%, 0.0130%, 0.0126%, and 0.02%.
[0066] As an embodiment of the present invention, at least two adjacent battery strings 2 have battery cells 21 connected to each other, or at least two adjacent battery strings 2 have battery cells 21 partially overlapping.
[0067] In this embodiment, at least two adjacent battery strings 2 have their cells 21 connected together, or at least two adjacent battery strings 2 have their cells 21 partially overlapping, meaning there are no gaps between the cells 21 of at least two adjacent battery strings 2. This can further increase the ratio of the area of the battery string 2 to the area of the front side 101 of the photovoltaic module 100, thereby further improving the power generation efficiency of the photovoltaic module 100. Furthermore, it can reduce the area ratio of the exposed busbar 7 on the front side 101 of the photovoltaic module 100. Preferably, having any two adjacent battery strings 2 have their cells 21 connected together, or having any two adjacent battery strings 2 have their cells 21 partially overlapping, can further increase the ratio of the area of the battery string 2 to the area of the front side 101 of the photovoltaic module 100, further improving the power generation efficiency of the photovoltaic module 100, and achieving complete concealment of the busbar 7, thus improving the front appearance of the photovoltaic module 100.
[0068] This utility model embodiment also provides a photovoltaic system, which includes the photovoltaic module 100 of the above embodiment. It should be noted that the photovoltaic system has the same or similar beneficial effects as the photovoltaic module 100, and the related parts between the two can be referred to each other. To avoid repetition, they will not be described again here.
[0069] In this embodiment, the photovoltaic system can be applied in photovoltaic power plants, such as ground-mounted power plants, rooftop power plants, and floating power plants. It can also be applied to equipment or devices that utilize solar energy to generate electricity, such as user solar power supplies, solar streetlights, solar cars, and solar buildings. Of course, it is understood that the application scenarios of the photovoltaic system are not limited to these; that is, the photovoltaic system can be applied in all fields that require solar energy to generate electricity. Taking a photovoltaic power generation system network as an example, the photovoltaic system may include a photovoltaic array, a combiner box, and an inverter. The photovoltaic array may be an array combination of multiple photovoltaic modules; for example, multiple photovoltaic modules can form multiple photovoltaic arrays. The photovoltaic array is connected to the combiner box, which can collect the current generated by the photovoltaic array. The collected current flows through the inverter and is converted into AC power required by the mains power grid before being connected to the mains power grid to achieve solar power supply.
[0070] In the description of this specification, references to terms such as "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of the present 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.
[0071] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A photovoltaic module, characterized in that, include: Border; and Multiple battery strings are arranged within the frame, each battery string including multiple battery cells arranged sequentially along the length direction of the photovoltaic module. Adjacent battery cells in each battery string are connected or partially overlap. The length direction of each battery string is the same as the length direction of the photovoltaic module, and the multiple battery strings are arranged sequentially along the width direction of the photovoltaic module. The ratio of the length of the battery string to the length of the photovoltaic module is 97% to 99%, and the ratio of the projected area of all the cells of the photovoltaic module on the front of the photovoltaic module to the total area of the front of the photovoltaic module is 93% to 99%.
2. The photovoltaic module according to claim 1, characterized in that, The sum of the projected lengths of the cells in the same battery string along the length direction of the battery string is greater than the length of the battery string, and the ratio of the sum of the projected lengths of the cells in the same battery string along the length direction of the battery string to the length of the battery string is 100% to 101%.
3. The photovoltaic module according to claim 1 or 2, characterized in that, The ratio of the sum of the projected lengths of the cells in the same battery string along the length direction of the battery string to the length of the battery string is 100% to 100.51%.
4. The photovoltaic module according to claim 1, characterized in that, The ratio of the length of the battery string to the length of the photovoltaic module is 97.5% to 98.7%.
5. The photovoltaic module of claim 1, wherein, The ratio of the sum of the projected lengths of the cells in the battery string along the length direction of the battery string to the length of the photovoltaic module is 98% to 99.5%.
6. The photovoltaic module of claim 5, wherein, The ratio of the area of the solar cells on the front side of the photovoltaic module to the total area of the front side of the photovoltaic module is 94% to 96%.
7. The photovoltaic module of claim 1, wherein, The ratio of the area of the busbars exposed on the front of the photovoltaic module to the total area of the front of the photovoltaic module is 0.0015% to 0.025%.
8. The photovoltaic module of claim 1 or 7, wherein, The ratio of the area of the busbars exposed on the front of the photovoltaic module to the total area of the front of the photovoltaic module is 0.002% to 0.02%.
9. The photovoltaic module according to claim 1, characterized in that, At least two adjacent battery strings have their battery cells connected together, or at least two adjacent battery strings have their battery cells partially overlapping.
10. The photovoltaic module according to claim 1, characterized in that, The adjacent cells of the battery string overlap to form an overlapping area, and the projected length of the overlapping area in the longitudinal direction of the photovoltaic module is 0.1 to 0.5 mm.
11. The photovoltaic module according to claim 1, characterized in that, The adjacent battery strings are spaced apart, and the distance between two adjacent battery strings is 0.5 to 2.5 mm.
12. A photovoltaic system, characterized in that, It includes the photovoltaic module as described in any one of claims 1 to 11.