Photovoltaic module and photovoltaic system

Abstract

The utility model discloses a photovoltaic component and a photovoltaic system, which relate to the field of photovoltaic technology and are used to improve the power generation power of the photovoltaic component. The photovoltaic component has two parallel and opposite first sides and two parallel and opposite second sides, the first side and the second side are perpendicular, and the photovoltaic component comprises a plurality of battery sheets arranged along a direction parallel to the first side and a direction parallel to the second side; the length of the first side is 1780mm-2400mm, and the length of the second side is 1125mm-1350mm; the length of the battery sheet is 180mm-185mm, and the width of the battery sheet is 95mm-106mm; or, the length of the battery sheet is 205mm-215mm, and the width of the battery sheet is 102.5mm-107.5mm; the single-side total effective light-receiving area of ​​the plurality of battery sheets accounts for 92%-97% of the assembly area of ​​the photovoltaic component.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic component and a photovoltaic system. Background Art

[0002] Photovoltaic modules are usually composed of laminates and frames. The laminates are formed by stacking a cover plate, an insulating film, a solar cell group, an insulating film and a back plate in sequence, and the frame is set at the edge of the laminate. The solar cell group includes multiple cells, and the cells affect the power generation of the photovoltaic module.

[0003] The existing methods of increasing the power generation of photovoltaic modules are usually from two aspects. On the one hand, the solar cells are improved to enhance the photoelectric conversion effect of the solar cells. On the other hand, the structure of the laminate is improved to increase the light transmittance of the photovoltaic modules, such as using transparent glass for both the cover and the back plate to receive light on both sides, etc. The power generation of photovoltaic modules can be increased by the above methods. How to provide a new method to increase the power generation of photovoltaic modules has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] The utility model aims to provide a photovoltaic module and a photovoltaic system, which can optimize and improve the power generation power of the photovoltaic module regardless of how the size of the photovoltaic module changes by configuring the optimal effective light receiving area of ​​the photovoltaic module.

[0005] In a first aspect, the utility model provides a photovoltaic module, the photovoltaic module having two parallel and opposite first sides and two parallel and opposite second sides, the first sides being perpendicular to the second sides, and the photovoltaic module comprising a plurality of solar cells arranged in a direction parallel to the first sides and in a direction parallel to the second sides;

[0006] The length of the first side is 1780mm to 2400mm, and the length of the second side is 1125mm to 1350mm;

[0007] The length of the battery cell is 180 mm to 185 mm, and the width of the battery cell is 95 mm to 106 mm; or, the length of the battery cell is 205 mm to 215 mm, and the width of the battery cell is 102.5 mm to 107.5 mm;

[0008] The total effective light-receiving area of ​​a single side of multiple cells accounts for 92% to 97% of the area of ​​the photovoltaic module.

[0009] When the above technical solution is adopted, by configuring the optimal light-receiving surface ratio in the photovoltaic module, that is, configuring the single-sided total effective light-receiving area of ​​all cells on the photovoltaic module to account for 92% to 97% of the area of ​​the photovoltaic module, the power generation per unit area and the overall power generation of the photovoltaic module can be optimized and improved regardless of how the size of the photovoltaic module changes. To this end, within the set size range of the photovoltaic module, the area of ​​the cells laid on the photovoltaic module by using cells in this size range can be larger, which can increase the proportion of the light-receiving area of ​​the cells on the photovoltaic module, can receive more solar energy, and thus increase the power generation per unit area and the overall power generation of the photovoltaic module.

[0010] In some possible implementations, under the selected light-receiving area ratio of the above-mentioned photovoltaic module, the length of the battery cell is preferably configured to be 182 mm to 185 mm.

[0011] In some possible implementations, under the selected light-receiving area ratio of the above-mentioned photovoltaic module, the width of the battery cell is preferably configured to be 96 mm to 98 mm.

[0012] In some possible implementations, when the light receiving area of ​​the selected photovoltaic module accounts for 93% to 97%, the length of the first side of the photovoltaic module is preferably configured to be 2370 mm to 2400 mm, and the length of the second side is preferably configured to be 1125 mm to 1150 mm.

[0013] In some possible implementations, when the light receiving area of ​​the selected photovoltaic module accounts for 92.5% to 97%, the length of the first side of the photovoltaic module is preferably configured to be 2150 mm to 2200 mm, and the length of the second side is preferably configured to be 1125 mm to 1150 mm.

[0014] In some possible implementations, when the light receiving area of ​​the selected photovoltaic module accounts for 92.5% to 97%, the length of the first side of the photovoltaic module is preferably configured to be 1980 mm to 2100 mm, and the length of the second side is preferably configured to be 1125 mm to 1150 mm.

[0015] In some possible implementations, when the light receiving area of ​​the selected photovoltaic module accounts for 92% to 96%, the length of the first side of the photovoltaic module is preferably configured to be 1780 mm to 1820 mm, and the length of the second side is preferably configured to be 1125 mm to 1150 mm.

[0016] In some possible implementations, under the selected light-receiving area ratio of the above-mentioned photovoltaic module, the length of the battery cell is preferably configured to be 210 mm to 213 mm.

[0017] In some possible implementations, under the selected light-receiving area ratio of the above-mentioned photovoltaic module, the width of the battery cell is preferably configured to be 105 mm to 107 mm.

[0018] In some possible implementations, when the light receiving area of ​​the selected photovoltaic module accounts for 93% to 97%, the length of the first side of the photovoltaic module is preferably configured to be 2250 mm to 2400 mm, and the length of the second side is 1280 mm to 1350 mm;

[0019] Or, the length of the first side is 2150mm to 2300mm, and the length of the second side is 1280mm to 1350mm. In some possible implementations, the total effective light-receiving area of ​​a single side of multiple cells accounts for 94% to 97% of the panel area of ​​the photovoltaic module. By reasonably arranging the photovoltaic modules and cells of the above sizes, a higher proportion of the total effective light-receiving area of ​​a single side can be achieved, thereby achieving a higher photovoltaic module power generation per unit area and overall power generation.

[0020] In some possible implementations, the cell is a back-contact cell. The back-contact cell has electrodes only on the back of the cell, which reduces the shielding of the light-receiving surface, increases the proportion of the effective light-receiving surface of the photovoltaic module, and increases the power generation per unit area and the overall power generation of the photovoltaic module.

[0021] In some possible implementations, the photovoltaic module has a middle bus bar, which is located in the area where multiple battery cells are located and arranged between two adjacent rows of battery cells; there is a first distance S11 between the first side of the middle bus bar parallel to its length direction and the edge of the adjacent battery cell, and there is a second distance S12 between the second side of the middle bus bar parallel to its length direction and the edge of the adjacent battery cell, 0mm≤S11≤4mm, 0mm≤S12≤4mm.

[0022] When the above technical solution is adopted, the middle bus bar is located in the gap between two adjacent rows of battery cells. On the premise of satisfying the insulation effect between the bus bar and the battery cells, the distance between the first side and the second side of the middle bus bar and the adjacent battery cells on both sides is reduced as much as possible, thereby reducing the arrangement spacing between the battery cells, so that the area ratio of the battery cells on the photovoltaic module is increased, thereby improving the power generation per unit area and the overall power generation of the photovoltaic module.

[0023] In some possible implementations, the width Wa of the middle bus bar is: 5 mm≤Wa≤8 mm.

[0024] In some possible implementations, an insulating structure is provided between at least the first side and the second side of the middle bus bar and the adjacent battery cells on both sides. In this way, the insulation between the middle bus bar and the battery cells on both sides is achieved through the insulating structure. If the distance between the two sides of the middle bus bar and the battery cells can be further reduced, the arrangement spacing between the battery cells can be reduced, so that the area ratio of the battery cells on the photovoltaic module is further increased, thereby further improving the power generation per unit area and the overall power generation of the photovoltaic module.

[0025] In some possible implementations, the insulating structure is disposed on a first side and a second side of the middle bus bar;

[0026] Or, the insulating structure is arranged on the first side edge, the second side edge and the side away from the welding strip of the middle bus bar;

[0027] Or, the insulating structure is arranged on the edges of the first side edge, the second side edge, the side away from the welding strip, and the side close to the welding strip of the middle bus bar;

[0028] Alternatively, the insulating structure is disposed on the edge of the battery cell adjacent to the first side edge and the second side edge.

[0029] When the above technical solutions are adopted, the above insulation structures can achieve effective insulation between the middle bus bar and the battery cells on both sides, and can reduce the distance between the middle bus bar and the battery cells on both sides.

[0030] In some possible implementations, the photovoltaic module includes a middle bus bar and an insulating tape, the insulating tape having a first side and a second side relative to each other, the two side edges of the first side of the insulating tape overlap the same side surface of two adjacent rows of battery cells, and the middle bus bar is arranged on the second side of the insulating tape and corresponds to the area between the two adjacent rows of battery cells.

[0031] When the above technical solution is adopted, the middle bus bar is insulated from the two adjacent rows of battery cells by the insulating tape. Under the condition of satisfying insulation, the distance between the two adjacent rows of battery cells can be shortened.

[0032] In some possible implementations, there is an overlapping area between the middle bus bar and the projections of two adjacent rows of battery cells on the battery cells; there is a first distance S21 between the first side of the middle bus bar parallel to its length direction and the edge of the adjacent battery cell, and there is a second distance S22 between the second side of the middle bus bar parallel to its length direction and the edge of the adjacent battery cell.

[0033] When the above technical solution is adopted, the insulating belt is a flat structure, and the middle bus bar is not embedded in the gap between two adjacent rows of battery cells. Instead, there is an overlapping area between the middle bus bar and the projections of the two adjacent rows of battery cells on the battery cells, so that the middle bus bar is at least partially hidden on the back of the battery cell. In this way, the arrangement interval between the two adjacent rows of battery cells can be further reduced, so that the area ratio of the battery cells on the photovoltaic module is further increased, thereby further improving the power generation per unit area and the overall power generation of the photovoltaic module.

[0034] In some possible implementations, the width of the middle busbar Wa≥S21+S22. When Wa=S21+S22, the spacing between two adjacent rows of cells can be close to zero, the arrangement is more compact, and the middle busbar can be completely hidden behind the cell, making the appearance neater.

[0035] In some possible implementations, 0mm≤S22≤4mm, 0mm≤S22≤4mm, that is, the overlap length between the middle bus bar and the battery cells on both sides is 0mm-4mm.

[0036] In some embodiments, the photovoltaic module has an edge bus bar, the edge bus bar is located at the edge of the region where the plurality of cells are located, and an insulating structure is provided between the edge bus bar and adjacent cells;

[0037] There is a gap between one side edge of the edge bus bar and the adjacent battery cell, and the distance between the gaps is 0 mm to 5 mm;

[0038] Or, one side edge of the edge bus bar overlaps with an adjacent battery cell, and the overlap length is less than or equal to 5 mm.

[0039] When the above technical solution is adopted, the edge bus bar and the adjacent battery cells can be spaced or overlapped. When overlapping, the edge bus bar can be hidden, the distance between the battery cell and the edge of the photovoltaic module can be shortened, and the area ratio of the battery cell can be increased.

[0040] In some possible implementations, the width of the edge bus bar is 3 mm to 5 mm.

[0041] In some possible implementations, the creepage distance of the outer edges of multiple cells is 9 mm to 17 mm. In this way, while meeting the creepage distance requirements of the edges of the cell area, the distance between the cell and the edge of the photovoltaic module is minimized, thereby increasing the area ratio of the cell in the photovoltaic module.

[0042] In some possible implementations, multiple cells form multiple cell strings, the string spacing between two adjacent cell strings is 0mm to 3mm, and the cell spacing between two adjacent cells in each cell string is 0mm to 2mm. In this way, the arrangement spacing between cells is reduced as much as possible, thereby increasing the area ratio of the cells, and increasing the power generation per unit area and the overall power generation of the photovoltaic module.

[0043] In a second aspect, the utility model further provides a photovoltaic system, including a support system, and a photovoltaic component installed on the support system, wherein the photovoltaic component is any one of the photovoltaic components described above.

[0044] Since the photovoltaic system adopts the above-mentioned photovoltaic components, the photovoltaic system has the same beneficial effects as the above-mentioned photovoltaic components, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0046] Figure 1 A schematic diagram of the structure of a photovoltaic module provided by an embodiment of the utility model;

[0047] Figure 2 for Figure 1 A schematic diagram of the structure between the intermediate bus bar and the battery cell in the local A;

[0048] Figure 3 A schematic diagram of the structure between an intermediate bus bar and a battery cell provided in an embodiment of the utility model;

[0049] Figure 4 for Figure 3 A schematic diagram of an insulating structure in FIG.

[0050] Figure 5 for Figure 3 A schematic diagram of another insulating structure in FIG.

[0051] Figure 6 for Figure 3 A schematic diagram of another insulating structure;

[0052] Figure 7 for Figure 3 A schematic diagram of another insulating structure;

[0053] Figure 8 A schematic diagram of another structure between an intermediate bus bar and a battery cell provided in an embodiment of the utility model;

[0054] Fig. 9 A schematic diagram of the structure between the third intermediate bus bar and the battery cell provided by the embodiment of the utility model;

[0055] Fig.10 A schematic diagram of the structure between the fourth intermediate bus bar and the battery cell provided by an embodiment of the utility model;

[0056] Fig.11 A schematic diagram of the structure between the fifth intermediate bus bar and the battery cell provided by an embodiment of the utility model;

[0057] Fig.12 for Figure 1 Schematic diagram of the structure between the edge busbars and solar cells of a photovoltaic module.

[0058] Figure numerals: 1 is a battery cell, 2 is a middle bus bar, 3 is an insulating structure, 4 is a welding strip, 5 is an insulating strip, 6 is a buffer pad, 7 is an edge bus bar, 8 is a photovoltaic module, 81 is a first side, and 82 is a second side. DETAILED DESCRIPTION

[0059] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0060] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0062] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0063] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0064] See also Figure 1 An embodiment of the utility model provides a photovoltaic component 8, which has two parallel and opposite first sides 81 and two parallel and opposite second sides 82, the first sides 81 and the second sides 82 are perpendicular, and the photovoltaic component 8 includes a plurality of battery cells 1 arranged along a direction parallel to the first sides 81 and a direction parallel to the second sides 82. For example, the first side 81 can be a long side, and the second side 82 can be a short side. Correspondingly, the long side of the battery cell 1 is parallel to the second side 82, and the short side of the battery cell 1 is parallel to the first side 81.

[0065] The length of the first side 81 is 1780 mm to 2400 mm, and the length of the second side 82 is 1125 mm to 1350 mm;

[0066] The length of the battery cell 1 is 180 mm to 185 mm. For example, the length of the battery cell 1 can be 180 mm, 180.1 mm, 180.2 mm, 180.3 mm, 180.4 mm, 180.5 mm, 180.6 mm, 180.7 mm, 180.8 mm, 180.9 mm, 181 mm, 181.1 mm, 181.2 mm, 181.3 mm, 181.4 mm, 181.5 mm, 181.6 mm, 181.7 mm, 181.8 mm, 181.9 mm, 182 mm, 182.1 mm, 182.2 mm, 182.3 mm, 182.4 mm, 182.5 mm, 182.6 mm, 182.7 mm, 182.8 mm, 182.9 mm, 182.1 mm, 182.9 mm, 182.1 mm, 182.1 mm, 182.2 mm, 182.3 mm, 182.4 mm, 182.5 mm, 182.6 mm, 182.7 mm, 182.8 mm, 182.9 mm, 182.1 mm, 182.2 mm, 182. .3mm, 182.4mm, 182.5mm, 182.6mm, 182.7mm, 182.8mm, 182.9mm, 183mm, 183.1mm, 183.2mm, 183.3mm, 183.4mm, 183.5mm, 183.6mm, 183.7mm, 183.8mm, 183.9mm, 184mm, 184.1mm, 184.2mm, 184.3mm, 184.4mm, 184.5mm, 184.6mm, 184.7mm, 184.8mm, 184.9mm, 185mm. The width of the battery cell 1 is 95 mm to 99 mm. For example, the width of the battery cell 1 can be 95 mm, 95.1 mm, 95.2 mm, 95.3 mm, 95.4 mm, 95.5 mm, 95.6 mm, 95.7 mm, 95.8 mm, 95.9 mm, 96 mm, 96.1 mm, 96.2 mm, 96.3 mm, 96.4 mm, 96.5 mm, 96.6 mm, 96.7 mm, 96.8 mm, 96.9 ...9 mm, 96.1 mm, 96.2 mm, 96.3 mm, 96.4 mm, 96.5 mm, 96.6 mm, 96.7 mm, 96.8 mm, 96.9 mm, 96.9 mm, 96.9 mm, 96.9 mm, 9mm, 97mm, 97.1mm, 97.2mm, 97.3mm, 97.4mm, 97.5mm, 97.6mm, 97.7mm, 97.8mm, 97.9mm, 98mm, 98.1mm, 98.2mm, 98.3mm, 98.4mm, 98.5mm, 98.6mm, 98.7mm, 98.8mm, 98.9mm, 99mm. The length and width of the above battery cell 1 can be arbitrarily combined.

[0067] Alternatively, the length of the battery cell 1 is 205 mm to 215 mm. For example, the length of the battery cell 1 can be 205 mm, 205.1 mm, 205.5 mm, 205.7 mm, 205.9 mm, 206 mm, 206.3 mm, 206.6 mm, 206.8 mm, 207 mm, 207.2 mm, 207.3 mm, 207.6 mm, 207.9 mm, 208.1 mm, 208.3 mm, 208.5 mm, 208.9 mm, 209.3 mm, 209. 5mm, 209.6mm, 209.8mm, 210mm, 210.3mm, 210.5mm, 210.9mm, 211mm, 211.5mm, 211.7mm, 211.9mm, 212.3mm, 212.5 mm, 212.7mm, 212.9mm, 213mm, 213.2mm, 213.5mm, 213.8mm, 214mm, 214.1mm, 214.3mm, 214.6mm, 214.8mm, 215mm. The width of the battery cell 1 is 102.5 mm to 107.5 mm. For example, the width of the battery cell can be 102.5 mm, 102.6 mm, 102.8 mm, 102.9 mm, 103 mm, 103.1 mm, 103.3 mm, 103.5 mm, 103.7 mm, 103.9 mm, 104 mm, 104.3 mm, 104.5 mm, 104.7 mm, 104.9 mm, 105 mm, 105.2 mm, 105.6 mm, 105.7 mm, 105.9 mm, 106.2 mm, 106.4 mm, 106.5 mm, 106.7 mm, 106.9 mm, 107 mm, 107.1 mm, 107.2 mm, 107.4 mm, 107.5 mm. The length and width of the above battery cell 1 can be arbitrarily matched and combined.

[0068] The above two types of battery cells 1 are both half-cell battery cells, that is, half-cell battery cells formed by dividing a whole cell into two.

[0069] The total effective light-receiving area of ​​a single side of all the cells 1 accounts for 92% to 97% of the area of ​​the photovoltaic assembly 8 , wherein the area of ​​the photovoltaic assembly 8 is the product of the first side 81 and the second side 82 .

[0070] When the above technical solution is adopted, by configuring the optimal light-receiving area ratio of the cell in the photovoltaic module 8, that is, configuring the single-sided total effective light-receiving area of ​​all the cells 1 on the photovoltaic module 8 to account for 92% to 97% of the area of ​​the photovoltaic module 8, the overall power generation capacity of the photovoltaic module 8 can be improved. To this end, within the set size range of photovoltaic modules of different types, the cell 1 within this size range can be laid on the photovoltaic module 8. The area of ​​the cell is larger, which can increase the proportion of the light-receiving area of ​​the cell 1 on the photovoltaic module 8, and can receive more solar energy, thereby increasing the power generation per unit area and the overall power generation capacity of the photovoltaic module 8.

[0071] Further, in some embodiments, when the light receiving area of ​​the selected photovoltaic module 8 accounts for 92% to 97%, the length of the battery cell 1 is preferably configured to be 182 mm to 185 mm. For example, the length of the battery cell 1 can be 182 mm, 182.1 mm, 182.2 mm, 182.3 mm, 182.4 mm, 182.5 mm, 182.6 mm, 182.7 mm, 182.8 mm, 182.9 mm, 183 mm m, 183.1mm, 183.2mm, 183.3mm, 183.4mm, 183.5mm, 183.6mm, 183.7mm, 183.8mm, 183.9mm, 184mm , 184.1mm, 184.2mm, 184.3mm, 184.4mm, 184.5mm, 184.6mm, 184.7mm, 184.8mm, 184.9mm, 185mm.

[0072] Further, in some embodiments, when the light receiving area of ​​the selected photovoltaic component 8 accounts for 92% to 97%, the width of the battery cell 1 is preferably configured to be 96mm to 98mm. For example, the width of the battery cell 1 can be 96mm, 96.1mm, 96.2mm, 96.3mm, 96.4mm, 96.5mm, 96.6mm, 96.7mm, 96.8mm, 96.9mm, 97mm, 97.1mm, 97.2mm, 97.3mm, 97.4mm, 97.5mm, 97.6mm, 97.7mm, 97.8mm, 97.9mm, and 98mm.

[0073] Furthermore, in some embodiments, when the total effective light-receiving area of ​​the cell 1 of the selected photovoltaic module 8 accounts for 92.5% to 94% of the area of ​​the photovoltaic module 8, the length of the cell 1 is preferably configured to be 182 mm to 183 mm, and the width of the cell 1 is preferably configured to be 96 mm to 97 mm.

[0074] Exemplarily, when the total effective light-receiving area of ​​the cell 1 accounts for 92.5% to 94% of the area of ​​the photovoltaic module 8, the length of the cell 1 can be specifically 182mm, 182.2mm, 183mm, etc., and the width of the cell 1 can be specifically 96mm, 96.3mm, 97mm, etc.

[0075] In some embodiments, when the total effective light-receiving area of ​​the cell 1 of the selected photovoltaic module 8 accounts for 95% to 97% of the area of ​​the photovoltaic module 8, the length of the cell 1 is preferably configured to be 183.5 mm to 185 mm, and the width of the cell 1 is preferably configured to be 97.5 mm to 98 mm.

[0076] Exemplarily, when the total effective light-receiving area of ​​the cell 1 accounts for 95% to 97% of the area of ​​the photovoltaic module 8, the length of the cell 1 can be 183.5mm, 183.6mm, 183.7mm, 184mm, 184.7, 185mm, etc., and the width of the cell can be 97.5mm, 97.7mm, 98mm, etc.

[0077] When the total effective light receiving area of ​​the cell 1 of the selected photovoltaic module 8 accounts for 92% to 97% of the area of ​​the photovoltaic module 8, and when the cell 1 with a length of 182 mm to 185 mm and a width of 96 mm to 98 mm is used, specifically, the size of the photovoltaic module 8 can also be the following:

[0078] The total effective light receiving area of ​​the cell 1 accounts for 93% to 97% of the area of ​​the photovoltaic module 8. Optionally, the number of cells 1 on the half surface of the photovoltaic module 8 is 72, including 6 cell strings, each cell string includes 12 cells 1, and the total number of cells 1 in the photovoltaic module 8 is 144. At this time, the length of the first side of the photovoltaic module is 2370 mm to 2400 mm, and the length of the second side 82 is 1125 mm to 1150 mm. For example, the length of the first side 81 is 2382 mm, and the length of the second side 82 is 1134 mm.

[0079] The total effective light receiving area of ​​the cell 1 accounts for 92.5% to 97% of the area of ​​the photovoltaic module 8. Optionally, the number of cells 1 on the half surface of the photovoltaic module 8 is 66, including 6 strings of cells, each string of cells includes 11 cells 1, and the total number of cells 1 in the photovoltaic module 8 is 132. At this time, the length of the first side 81 of the photovoltaic module 8 is 2150mm to 2200mm, and the length of the second side 82 is 1125mm to 1150mm. For example, the length of the first side 81 can be 2188mm and the length of the second side 82 is 1134mm. Optionally, the number of cells 1 on the half surface of the photovoltaic module 8 is 60, including 6 strings of cells, each string of cells includes 10 cells 1, and the total number of cells 1 in the photovoltaic module 8 is 120. At this time, the length of the first side 81 of the photovoltaic module 8 is 1980mm to 2100mm, and the length of the second side 82 is 1125mm to 1150mm. For example, the length of the first side 81 is 1994 mm, and the length of the second side 82 is 1134 mm.

[0080] The total effective light receiving area of ​​the cell 1 accounts for 92% to 96% of the area of ​​the photovoltaic module 8. Optionally, the number of cells 1 on the half surface of the photovoltaic module 8 is 54, including 6 strings of cells, each string of cells includes 9 cells 1, and the total number of cells 1 in the photovoltaic module 8 is 108. The length of the first side 81 of the photovoltaic module 8 is 1780mm to 1820mm, and the length of the second side 82 is 1125mm to 1150mm. For example, the length of the first side 81 is 1800mm, and the length of the second side 82 is 1134mm,

[0081] In some embodiments, when the light receiving area of ​​the selected photovoltaic module 8 accounts for 92% to 97%, the length of the battery cell 1 is preferably configured to be 210 mm to 213 mm. For example, the length of the battery cell 1 can be 210 mm, 210.1 mm, 210.2 mm, 210.3 mm, 210.4 mm, 210.5 mm, 210.6 mm, 210.7 mm, 210.8 mm, 210.9 mm, 211 mm, 211.1mm, 211.2mm, 211.3mm, 211.4mm, 211.5mm, 211.6mm, 211.7mm, 211.8mm, 211.9mm, 212mm, 212.1mm, 212.2mm, 212.3mm, 212.4mm, 212.5mm, 212.6mm, 212.7mm, 212.8mm, 212.9mm, 213mm.

[0082] Further, in some embodiments, when the light receiving area of ​​the selected photovoltaic component 8 accounts for 92% to 97%, the width of the battery cell 1 is preferably configured to be 105mm to 107mm. For example, the width of the battery cell 1 can be 105mm, 105.1mm, 105.2mm, 105.3mm, 105.4mm, 105.5mm, 105.6mm, 105.7mm, 105.8mm, 105.9mm, 106mm, 106.1mm, 106.2mm, 106.3mm, 106.4mm, 106.5mm, 106.6mm, 106.7mm, 106.8mm, 106.9mm, and 107mm.

[0083] Furthermore, in some embodiments, when the total effective light-receiving area of ​​the cell 1 of the selected photovoltaic module 8 accounts for 92% to 93.5% of the area of ​​the photovoltaic module 8, the length of the cell 1 is preferably configured to be 210 mm to 211 mm, and the width of the cell 1 is 105 mm to 105.5 mm.

[0084] Exemplarily, when the total effective light-receiving area of ​​the cell 1 accounts for 92% to 93.5% of the area of ​​the photovoltaic module 8, the length of the cell 1 can be specifically 210mm, 210.5mm, 211mm, etc., and the width of the cell 1 can be specifically 105mm, 105.2mm, 105.3mm, 105.5mm, etc.

[0085] In some embodiments, when the total effective light-receiving area of ​​the cell 1 of the selected photovoltaic module 8 accounts for 96% to 97% of the area of ​​the photovoltaic module 8, the length of the cell 1 is preferably configured to be 211.5 mm to 213 mm, and the width of the cell 1 is preferably configured to be 106.5 mm to 107.5 mm.

[0086] Exemplarily, when the total effective light-receiving area of ​​the cell 1 accounts for 96% to 97% of the area of ​​the photovoltaic module 8, the length of the cell 1 can be 211.5 mm, 211.8 mm, 212.5 mm, 212.8 mm, etc., and the width of the cell 1 can be 106.5 mm, 106.9 mm, 107.2 mm, 107.5 mm, etc.

[0087] Exemplarily, when the total effective light receiving area of ​​the cell 1 of the selected photovoltaic module 8 accounts for 92% to 97% of the area of ​​the photovoltaic module 8, and the length of the cell 1 is 210 mm to 211 mm, and the width of the cell 1 is 105 mm to 105.5 mm, the photovoltaic module 8 can also be the following:

[0088] The total effective light receiving area of ​​the cell 1 accounts for 93% to 97% of the area of ​​the photovoltaic module 8. Optionally, the number of cells 1 on the half surface of the photovoltaic module 8 is 72, including 6 cell strings, each cell string includes 12 cells 1, and the total number of cells 1 in the photovoltaic module 8 is 144. At this time, the length of the first side 81 of the photovoltaic module 8 is 2250 mm to 2400 mm, and the length of the second side 82 is 1280 mm to 1350 mm. For example, the length of the first side 81 is 2384 mm, and the length of the second side 82 is 1303 mm.

[0089] The total effective light receiving area of ​​the cell 1 accounts for 93% to 97% of the area of ​​the photovoltaic module 8. Optionally, the number of cells 1 on the half surface of the photovoltaic module 8 is 66, including 6 strings of cells, each string of cells includes 11 cells 1, and the total number of cells 1 in the photovoltaic module 8 is 132. At this time, the length of the first side 81 of the photovoltaic module 8 is 2150mm to 2300mm, and the length of the second side 82 is 1280mm to 1350mm. For example, the length of the first side 81 can be 2172mm, and the length of the second side 82 can be 1303mm.

[0090] In another embodiment, when the total effective light receiving area of ​​the cell 1 of the selected photovoltaic module 8 accounts for 92% to 94% of the area of ​​the photovoltaic module 8, the length of the cell 1 is preferably configured to be 182 mm to 183 mm, and the width of the cell 1 is 105 mm to 106 mm. For example, the length of the cell 1 is 182 mm, the width of the cell 1 is 105 mm, the number of cells 1 on the half surface of the photovoltaic module 8 is 72, including 6 strings of cells, each string of cells includes 12 cells 1, and the total number of cells 1 in the photovoltaic module 8 is 144. At this time, the length of the first side 81 of the photovoltaic module 8 is 2384 mm, and the length of the second side 82 is 1134 mm.

[0091] In this embodiment, the cell 1 is a back-contact cell. The back-contact cell only has electrodes on the back of the cell 1, which reduces the shielding of the light-receiving surface of the cell 1, increases the proportion of the effective light-receiving surface of the photovoltaic module 8, and increases the power generation per unit area and the overall power generation of the photovoltaic module.

[0092] like Figure 1 and 2As shown, in some embodiments, the photovoltaic component 8 has a middle bus bar 2, which is located in the area where the entire battery cell 1 is located and is arranged between two adjacent rows of battery cells 1. For example, the middle bus bar 2 is located between the two half-surfaces of the photovoltaic component 8, and is used for bus welding with the welding strips of multiple battery strings on the two half-surfaces; there is a first distance S11 between the first side 81 of the middle bus bar 2 parallel to its length direction and the edge of the adjacent battery cell 1, and there is a second distance S12 between the second side 81 of the middle bus bar 2 parallel to its length direction and the edge of the adjacent battery cell 1, 0mm≤S11≤4mm, 0mm≤S12≤4mm.

[0093] Exemplarily, the sizes of the first distance S11 and the second distance S12 can be the same or different. The first distance S11 and the second distance S12 can specifically be 0mm, 0.1mm, 0.3mm, 0.5mm, 0.8mm, 1mm, 1.3mm, 1.5mm, 1.8mm, 2mm, 2.2mm, 2.5mm, 2.8mm, 3mm, 3.1m, 3.2mm, 3.5mm, 3.7mm, 4mm, etc.

[0094] When the battery cell 1 has a length of 182 mm to 185 mm and a width of 96 mm to 98 mm, the first distance S11 and the second distance S12 may be 2.5 mm to 3.5 mm.

[0095] When the battery cell 1 has a length of 210 mm to 213 mm and a width of 105 mm to 107 mm, the first distance S11 and the second distance S12 may be 3 mm to 4 mm.

[0096] In the case of adopting the above technical solution, the middle bus bar 2 is located in the gap between two adjacent rows of battery cells 1. On the premise of satisfying the insulation effect between the middle bus bar 2 and the battery cells 1, the distance between the first side and the second side of the middle bus bar 2 and the adjacent battery cells 1 on both sides is reduced as much as possible, thereby reducing the arrangement spacing between the battery cells 1, so that the area ratio of the battery cells 1 on the photovoltaic module 8 is increased to 92% to 97%. Thereby, the power generation per unit area and the overall power generation of the photovoltaic module 8 are improved.

[0097] In some embodiments, the width Wa of the middle bus bar 2 is: 5mm≤Wa≤8mm. For example, the width of the middle bus bar 2 can be 5mm, 5.1mm, 5.5mm, 5.7mm, 5.8mm, 6mm, 6.2mm, 6.5mm, 6.8mm, 7mm, 7.3mm, 7.5mm, 7.8mm, 8mm.

[0098] For example, when the battery cell 1 has a length of 182 mm to 185 mm and a width of 96 mm to 98 mm, 5 mm ≤ Wa ≤ 7 mm, and the thickness of the middle bus bar 2 is 0.25 mm to 0.3 mm.

[0099] When the battery cell 1 has a length of 210 mm to 213 mm and a width of 105 mm to 107 mm, 6 mm ≤ Wa ≤ 8 mm, and the thickness of the middle bus bar 2 is 0.25 mm to 0.35 mm.

[0100] like Figure 2-Figure 7 As shown, in some possible implementations, an insulating structure 3 is provided between at least the first side and the second side of the middle bus bar 2 and the adjacent battery cells 1 on both sides. In this way, the insulation between the middle bus bar 2 and the battery cells 1 on both sides is achieved through the insulating structure 3, and there is no need to set a large insulating interval, so that the distance between the two sides of the middle bus bar 2 and the battery cells 1 can be further reduced, thereby reducing the arrangement spacing between the battery cells 1, so that the area ratio of the battery cells 1 on the photovoltaic module 8 is further increased, thereby further improving the power generation per unit area and the overall power generation of the photovoltaic module 8.

[0101] For example, Figure 3 As shown, the insulating structure 3 is arranged on the first side and the second side of the middle bus bar 2. The insulating structure 3 is an insulating film, which can be an organic insulating material or an inorganic insulating material. The thickness of the insulating film can be 0.01 mm to 1 mm. Specifically, the thickness of the organic insulating film is 0.03 mm to 1 mm, and the thickness of the inorganic insulating film is 0.01 mm to 1 mm. Or a composite film of the two. Since the insulating film is thin, the distance between the middle bus bar 2 and the battery cell 1 can be reduced.

[0102] like Figure 4 As shown, the insulating structure 3 is arranged on the first side, the second side and the side away from the welding strip 4 of the middle bus bar 2. The insulating structure 3 is also an insulating film. Figure 3 The insulating film is the same as in the example above and will not be described in detail.

[0103] like Figure 5 As shown, the insulating structure 3 is arranged on the first side edge, the second side edge, the side away from the welding strip 4 and the side close to the welding strip 4 of the middle bus bar 2. The insulating structure 3 is also an insulating film. Figure 3 The insulating film is the same as in the example above and will not be described in detail.

[0104] like Figure 6 and Figure 7As shown, the insulating structure 3 is arranged on the edge of the battery cell 1 adjacent to the first side and the second side of the middle bus bar 2. That is, the insulating structure 3 is arranged on the edge of the battery cell 1. As long as the insulating structure 3 is located between the middle bus bar 2 and the battery cell 1, the insulating effect can be achieved. The insulating structure 3 is also an insulating film, such as Figure 6 As shown, the insulating film is only arranged on the side of the battery cell 1 close to the middle bus bar 2, as shown in FIG. Figure 7 As shown, the insulating film is arranged on the side of the battery cell 1 close to the middle bus bar 2 and on the edge of a surface close to the welding strip 4. Figure 3 The insulating film is the same as that in FIG.

[0105] When the above technical solution is adopted, the above insulation structure 3 can achieve effective insulation between the middle bus bar 2 and the battery cells 1 on both sides, and can reduce the distance between the middle bus bar 2 and the battery cells 1 on both sides.

[0106] like Figure 8 and Fig. 9 As shown, in some embodiments, the photovoltaic assembly 8 includes a middle bus bar 2 and an insulating tape 5, the insulating tape 5 has a first side and a second side relative to each other, the two side edges of the first side of the insulating tape 5 overlap the same side surface of two adjacent rows of battery cells 1, and the middle bus bar 2 is arranged on the second side of the insulating tape 5 and corresponds to the area between the two adjacent rows of battery cells 1.

[0107] For example, Figure 8 As shown, the insulating tape 5 may be an adhesive film, which forms a structure with a middle depression and two sides overlapping the battery cell 1 , and the middle bus bar 2 is located at the middle depression.

[0108] For example, Fig. 9 As shown, the insulating tape 5 can be a hard insulating material, and the insulating tape 5 is a flat plate structure. The two side edges of the insulating tape 5 overlap the battery cell 1, and the width of the insulating tape 5 is 5mm to 6mm wider than the width of the middle bus bar 2.

[0109] When the above technical solution is adopted, the middle bus bar 2 is insulated from the two adjacent rows of battery cells 1 by the insulating tape 5. Under the condition of satisfying insulation, the distance between the two adjacent rows of battery cells 1 can be reduced.

[0110] like Fig.11 As shown, there is an overlapped area between the projections of the middle bus bar 2 and the two adjacent rows of battery cells 1 on the battery cell 1; there is a first distance S21 between the first side of the middle bus bar 2 parallel to its length direction and the edge of the adjacent battery cell 1, and there is a second distance S22 between the second side of the middle bus bar 2 parallel to its length direction and the edge of the adjacent battery cell 1. The first distance 21 and the second distance S22 can be the same or different.

[0111] When the above technical solution is adopted, since the insulating tape 5 is a flat structure, the middle bus bar 2 is not embedded in the gap between two adjacent rows of battery cells 1, but there is an overlapping area between the middle bus bar 2 and the projections of the two adjacent rows of battery cells 1 on the battery cell 1, so that the middle bus bar 2 is at least partially hidden on the back side of the battery cell 1. In this way, the arrangement interval between the two adjacent rows of battery cells 2 can be further reduced, so that the area ratio of the battery cell 1 on the photovoltaic module 2 is further increased, thereby further improving the unit area power generation and the overall power generation of the photovoltaic module 8.

[0112] Furthermore, if Fig.11 As shown, in this embodiment, the width of the middle bus bar 2 is Wa≥S21+S22. When Wa=S21+S22, the spacing between two adjacent rows of battery cells 1 can be close to zero, the arrangement is more compact, and the middle bus bar 2 can be completely hidden behind the battery cell 1, making the appearance neater.

[0113] In this embodiment, when the width of the middle bus bar 2 is 5 mm to 8 mm, 0 mm ≤ S22 ≤ 4 mm, 0 mm ≤ S22 ≤ 4 mm, that is, the overlap distance between the middle bus bar 2 and the battery cells 1 on both sides is 0 mm to 4 mm. The spacing between two adjacent rows of battery cells 1 can be reduced to 0 mm to 2 mm.

[0114] like Fig.10 As shown, the photovoltaic module 8 also includes a buffer pad 6, which is located in the gap between two adjacent rows of battery cells 1 and contacts the first surface of the insulating tape 5. The thickness of the buffer pad 6 is the same as the thickness of the battery cell 1. The buffer pad 6 can effectively prevent the battery cell 1 from being broken due to lamination when the intermediate bus bar 2 is hidden to the back of the battery cell 1.

[0115] like Figure 1 and Fig.12 As shown, in some embodiments, the photovoltaic module 8 has an edge bus bar 7, and the edge bus bar 7 is located at the edge of the area where the entire battery cell 1 is located. Specifically, the edge bus bar 7 is located at two opposite edges of the two half-surfaces of the photovoltaic module 8. The edge bus bar 7 is parallel to the middle bus bar 2. The edge bus bar 7 on each side is respectively connected to the welding strips 4 of multiple battery strings on the half-surface of the photovoltaic module 8. An insulating structure 3 is arranged between the edge bus bar 7 and the adjacent battery cell 1. The insulating structure 3 can be an insulating film, and the insulating film and the welding strip 4 are connected to each other. Figure 3 The insulating film is the same as in the example above and will not be described in detail.

[0116] There is a gap between one side edge of the edge bus bar 7 and the adjacent battery cell 1, and the distance of the gap is 0 mm to 5 mm;

[0117] Or, one side edge of the edge bus bar 7 overlaps with the adjacent battery cell 1 , and the overlapping length is less than or equal to 5 mm.

[0118] When the above technical solution is adopted, the edge bus bar 7 and the adjacent battery cell 1 can be spaced apart or overlapped. When overlapped, the edge bus bar 7 can be hidden, the distance between the battery cell 1 and the edge of the photovoltaic module 8 can be shortened, and the area ratio of the battery cell 1 can be increased.

[0119] Exemplarily, the width of the edge bus bar 7 is 3 mm to 5 mm.

[0120] In some embodiments, the creepage distance of the outer edges of the plurality of battery cells 1 is 9 mm to 17 mm. For example, the creepage distance may be 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, etc.

[0121] For example, the creepage distance of the entire cell 1 parallel to the long side of the photovoltaic assembly 8 is 13 mm to 14 mm, and the creepage distance of the entire cell 1 parallel to the short side of the photovoltaic assembly 8 is 13 mm to 17 mm, preferably 13 mm to 14 mm.

[0122] In some possible implementations, multiple battery cells 1 form multiple battery strings, and the string spacing between two adjacent battery strings is 0 mm to 3 mm. For example, the string spacing can be 0 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, or 3 mm. The spacing between two adjacent cells 1 in each battery string is 0 mm to 2 mm. For example, the spacing can be 0 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm. In this way, the arrangement spacing between the cells 1 is reduced as much as possible, thereby increasing the area ratio of the cells 1 and increasing the power generation per unit area and the overall power generation of the photovoltaic module 8.

[0123] Based on the photovoltaic components described in any of the above embodiments, the embodiment of the utility model further provides a photovoltaic system, including a support system and a photovoltaic component installed on the support system, wherein the photovoltaic component is the photovoltaic component described in any of the above embodiments. The support system may include a rigid photovoltaic support or a flexible photovoltaic support including a flexible support cable.

[0124] Since the photovoltaic system adopts the photovoltaic components described in any of the above embodiments, the photovoltaic system has the same beneficial effects as the above photovoltaic components, which will not be described in detail here.

[0125] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0126] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A photovoltaic module, the photovoltaic module having two parallel and opposite first sides and two parallel and opposite second sides, the first sides are perpendicular to the second sides, and the photovoltaic module comprises a plurality of solar cells arranged in a direction parallel to the first sides and in a direction parallel to the second sides; It is characterized in that The length of the first side is 1780 mm to 2400 mm, and the length of the second side is 1125 mm to 1350 mm; The length of the battery cell is 180 mm to 185 mm, and the width of the battery cell is 95 mm to 106 mm; or, the length of the battery cell is 205 mm to 215 mm, and the width of the battery cell is 102.5 mm to 107.5 mm; The total effective light-receiving area of ​​a single side of the plurality of battery sheets accounts for 92% to 97% of the area of ​​the photovoltaic assembly.

2. The photovoltaic module according to claim 1, characterized in that: The length of the battery cell is 182 mm to 185 mm.

3. The photovoltaic module according to claim 2, characterized in that: The width of the battery cell is 96 mm to 98 mm.

4. The photovoltaic module according to claim 3, characterized in that: The length of the first side is 2370 mm to 2400 mm, and the length of the second side is 1125 mm to 1150 mm; Or, the length of the first side is 2150 mm to 2200 mm, and the length of the second side is 1125 mm to 1150 mm; Or, the length of the first side is 1980 mm to 2100 mm, and the length of the second side is 1125 mm to 1150 mm; Alternatively, the length of the first side is 1780 mm to 1820 mm, and the length of the second side is 1125 mm to 1150 mm.

5. The photovoltaic module according to claim 1, characterized in that: The length of the battery cell is 210 mm to 213 mm.

6. The photovoltaic module according to claim 5, characterized in that: The width of the battery cell is 105 mm to 107 mm.

7. The photovoltaic module according to claim 6, characterized in that: The length of the first side is 2250 mm to 2400 mm, and the length of the second side is 1280 mm to 1350 mm; Alternatively, the length of the first side is 2150 mm to 2300 mm, and the length of the second side is 1280 mm to 1350 mm.

8. The photovoltaic module according to any one of claims 1 to 7, characterized in that: The total effective light-receiving area of ​​a single side of the plurality of battery sheets accounts for 94% to 97% of the panel area of ​​the photovoltaic assembly.

9. The photovoltaic module according to claim 8, characterized in that: The battery cell is a back contact battery.

10. The photovoltaic module according to claim 1 or 9, characterized in that: The photovoltaic assembly has a middle bus bar, which is located in the area where the plurality of battery cells are located and arranged between two adjacent rows of battery cells; There is a first distance S11 between the first side of the middle bus bar parallel to its length direction and the edge of the adjacent battery cell, and there is a second distance S12 between the second side of the middle bus bar parallel to its length direction and the edge of the adjacent battery cell, 0mm≤S11≤4mm, 0mm≤S12≤4mm.

11. The photovoltaic module according to claim 10, characterized in that: At least an insulating structure is provided between the first side edge and the second side edge of the middle bus bar and the battery cells adjacent to both sides.

12. The photovoltaic module according to claim 11, characterized in that: The insulating structure is disposed on the first side and the second side of the middle bus bar; Or, the insulating structure is arranged on the first side edge, the second side edge and a surface away from the welding strip of the middle bus bar; Or, the insulating structure is arranged on the edges of the first side, the second side, a side away from the welding strip, and a side close to the welding strip of the middle bus bar; Alternatively, the insulating structure is disposed on an edge of the battery cell adjacent to the first side edge and the second side edge.

13. The photovoltaic module according to claim 1 or 9, characterized in that: The photovoltaic module includes a middle bus bar and an insulating tape, the insulating tape has a first surface and a second surface opposite to each other, the two side edges of the first surface of the insulating tape overlap the same side surface of two adjacent rows of battery cells, and the middle bus bar is arranged on the second surface of the insulating tape and corresponds to the area between the two adjacent rows of battery cells.

14. The photovoltaic module according to claim 13, characterized in that: There is an overlapping area between the middle bus bar and the projections of the two adjacent rows of battery cells on the battery cells; There is a first distance S21 between a first side of the middle bus bar parallel to its length direction and an edge of the adjacent battery cell, and there is a second distance S22 between a second side of the middle bus bar parallel to its length direction and an edge of the adjacent battery cell.

15. The photovoltaic module according to claim 14, characterized in that: The width of the middle bus bar Wa≥S21+S22.

16. The photovoltaic module according to claim 14 or 15, characterized in that: 0mm≤S21≤4mm, 0mm≤S22≤4mm.

17. The photovoltaic module according to claim 1 or 9, characterized in that: The photovoltaic module has an edge bus bar, the edge bus bar is located at the edge of the area where the plurality of battery cells are located, and an insulation structure is arranged between the edge bus bar and the adjacent battery cells; There is a gap between one side edge of the edge bus bar and the adjacent battery cell, and the distance of the gap is 0 mm to 5 mm; Alternatively, one side edge of the edge bus bar overlaps with the adjacent battery cell, and the overlap length is less than or equal to 5 mm.

18. The photovoltaic module according to claim 1 or 9, characterized in that: The plurality of battery cells form a plurality of battery strings, the string spacing between two adjacent battery strings is 0 mm to 3 mm, and the cell spacing between two adjacent battery cells in each battery string is 0 mm to 2 mm.

19. A photovoltaic system, comprising a support system, and a photovoltaic component mounted on the support system, wherein the photovoltaic component is the photovoltaic component according to any one of claims 1 to 18.

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