Photovoltaic module and photovoltaic system

Abstract

The invention provides a photovoltaic module and a photovoltaic system. The photovoltaic module comprises a first battery unit and a second battery unit which are connected in parallel, wherein the first battery unit comprises a first battery string group, a second battery string group and a third battery string group which are connected in series; the second battery unit comprises a fourth battery string group, a fifth battery string group and a sixth battery string group which are connected in series; each of the first battery string group, the second battery string group, the third battery string group, the fourth battery string group, the fifth battery string group and the sixth battery string group comprises two battery strings which are connected in series, and each battery string comprises two battery sub-strings which are connected in parallel; each battery string comprises a plurality of quartered battery pieces which are connected in series, and each quartered battery piece is a quarter battery piece formed by cutting a whole battery piece. According to the photovoltaic module provided by the embodiment of the invention, the battery piece is arranged to be the quarter battery piece formed by cutting the whole battery piece, so that the internal power loss of the battery piece can be reduced, and the output power of the photovoltaic module can be improved.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic technology, and in particular to a photovoltaic component and a photovoltaic system. Background Art

[0002] As global energy supplies become increasingly tight, developing new energy sources has become a key energy strategy for all countries. Solar energy, due to its ease of access, has attracted increasing attention. In recent years, the solar photovoltaic industry has developed rapidly, and the application of photovoltaic modules has become increasingly widespread.

[0003] However, the power of photovoltaic modules in related technologies is relatively low and cannot effectively meet the needs of high-power usage scenarios. Based on this, how to increase the power of photovoltaic modules has become an urgent problem to be solved. Summary of the Invention

[0004] The present invention provides a photovoltaic module and a photovoltaic system to solve the technical problem of how to increase the power of the photovoltaic module.

[0005] The embodiment of the present invention is implemented as follows: the photovoltaic module includes: a first battery unit and a second battery unit connected in parallel, the first battery unit includes a first battery string group, a second battery string group and a third battery string group connected in series; the second battery unit includes a fourth battery string group, a fifth battery string group and a sixth battery string group connected in series; the first battery string group, the second battery string group, the third battery string group, the fourth battery string group, the fifth battery string group and the sixth battery string group each include two battery strings connected in series, the battery string includes two battery sub-strings connected in parallel; the battery sub-string includes a plurality of four-cell slices connected in series, and the four-cell slice is a quarter battery slice cut from a whole battery slice.

[0006] Thus, in the photovoltaic module of the embodiment of the present invention, the applicant arranges the cells in the photovoltaic module to be quarter cells cut from a whole cell, thereby reducing the area of ​​the cell in the photovoltaic module, reducing the power generation current of a single cell, and further reducing the internal power loss of the single cell, reducing the overall power loss of the photovoltaic module, and thus improving the output power of the photovoltaic module. In addition, the photovoltaic module of the embodiment of the present invention arranges battery cells in parallel, and each battery cell includes a circuit design of a plurality of battery strings connected in series, thereby reducing the power loss of the photovoltaic module while making the overall output current and overall output voltage of the photovoltaic module in this embodiment equal to the overall output current and overall output voltage of the existing photovoltaic module using half-cell cells, thereby avoiding the reduction of the output current and output voltage of the photovoltaic module in the embodiment of the present invention, and further improving the output power of the photovoltaic module in the embodiment of the present invention.

[0007] Furthermore, the first size of the quartered cell is the same as the first size of the full cell, and the ratio of the second size of the quartered cell to the second size of the full cell is 1:4. This further reduces the resistance of a single quartered cell, thereby further reducing the power loss of the photovoltaic module.

[0008] Furthermore, the ratio of the first dimension of the quartered cell to the first dimension of the whole cell is 1:2, and the ratio of the second dimension of the quartered cell to the second dimension of the whole cell is 1:2. In this way, the resistance of the quartered cell remains unchanged, which helps maintain the overall load balance of the module.

[0009] Furthermore, one of the first size and the second size is length, and the other is width.

[0010] Furthermore, the first end of the first battery string group is connected to the first end of the fourth battery string group, and the second end of the first battery string group is connected to the second end of the fourth battery string group.

[0011] Furthermore, the photovoltaic assembly also includes a first bypass module, the output end of the first bypass module is connected to the first end of the first battery string group and the first end of the fourth battery string group; the input end of the first bypass module is connected to the second end of the first battery string group and the second end of the fourth battery string group. In this way, the first bypass module is connected in parallel with the first battery string group and the fourth battery string group, respectively, and the first bypass module can play a bypass role. When there are a large number of blocked quadrant cells in the first battery string group and the fourth battery string group, that is, when there are a large number of abnormal quadrant cells, the first bypass module can be turned on to bypass the first battery string group and the fourth battery string group, thereby preventing the cells from being reverse biased and wasting the cells in the first battery string group and the fourth battery string group.

[0012] Furthermore, the first end of the second battery string group is connected to the first end of the fifth battery string group, the first end of the second battery string group is also connected to the second end of the first battery string group, the first end of the fifth battery string group is also connected to the second end of the fourth battery string group; the second end of the second battery string group is connected to the second end of the fifth battery string group.

[0013] Furthermore, the photovoltaic assembly also includes a second bypass module; the output end of the second bypass module and the first end of the second battery string group are connected to the first end of the fifth battery string group; the input end of the second bypass module and the second end of the second battery string group are connected to the second end of the fifth battery string group.

[0014] In this way, the second bypass module is connected in parallel with the second and fifth battery strings, respectively, and can function as a bypass. When a large number of obstructed quadrants (i.e., abnormal quadrants) are present in the second and fifth battery strings, the second bypass module can be turned on to bypass the second and fifth battery strings, preventing reverse bias in the cells and thus damaging the cells in the second and fifth battery strings.

[0015] Furthermore, the first end of the third battery string group is connected to the first end of the sixth battery string group; the first end of the third battery string group is also connected to the second end of the second battery string group, the first end of the sixth battery string group is also connected to the second end of the fifth battery string group; the second end of the third battery string group is connected to the second end of the sixth battery string group.

[0016] The photovoltaic assembly also includes a third bypass module; the output end of the third bypass module and the first end of the third battery string group are connected to the first end of the sixth battery string group; the input end of the third bypass module and the second end of the third battery string group are connected to the second end of the sixth battery string group.

[0017] In this way, the third bypass module is connected in parallel with the third and sixth battery strings, respectively, and can function as a bypass. When a large number of obstructed quadrants (i.e., abnormal quadrants) are present in the third and sixth battery strings, the third bypass module can be turned on to bypass the third and sixth battery strings, preventing reverse bias and loss of the cells in the third and sixth battery strings.

[0018] Furthermore, the first and second battery cells are arranged along a first direction; each of the first and second battery cells includes a plurality of battery strings arranged along a second direction, the second direction intersecting the first direction. This allows the photovoltaic assembly to be arranged in an array, so that the dimensions of the photovoltaic assembly in the embodiment of the present application are the same as those of conventional assemblies. Consequently, the photovoltaic assembly in the embodiment of the present application does not require special processes or steps during production or assembly, reducing the difficulty of production or assembly.

[0019] Furthermore, the number of four-cell components in each cell string is the same. This ensures consistent output voltage and current across all cell strings, facilitating standardized layout and electrical matching across all cell strings in a photovoltaic module, simplifying the placement of solder strip wiring and bypass modules. This also facilitates unified wiring design, facilitating rapid switching and debugging of automated production equipment, and eliminating the need to differentiate between wiring patterns for different strings during on-site installation and maintenance, thereby improving the efficiency of photovoltaic module setup.

[0020] Furthermore, in each battery string, two adjacent quadrants of the battery cells have an overlapping area, and the overlapping area has a dimension in the first direction of 0.1 mm to 10 mm. This eliminates the spacing between the quadrants in the battery string, allowing more battery cells to be placed in the battery string, thereby improving the efficiency of the battery string.

[0021] Furthermore, in each of the cell strings, adjacent quadrants have a first spacing in the first direction that is less than 5 mm. This allows for a certain spacing between adjacent quadrants in the cell string, preventing them from blocking each other and thereby improving the photovoltaic module's photoelectric conversion efficiency.

[0022] Furthermore, the photovoltaic assembly also includes a plurality of long bus bars. In the first battery unit, two battery strings adjacent to each other along the second direction are connected in series through the long bus bar. The long bus bar is also used to connect in parallel two battery sub-strings adjacent to each other in the second direction in the battery string. In the second battery unit, two battery strings adjacent to each other along the second direction are connected in series through the long bus bar.

[0023] Furthermore, the long busbars are used to connect two adjacent sub-strings of batteries in the battery string in the second direction in parallel. Thus, by providing each long busbar, two adjacent battery strings in the second direction can be connected in series. Furthermore, two adjacent sub-strings of batteries in the battery string in the second direction can be connected in parallel.

[0024] Furthermore, the photovoltaic assembly further includes a first short bus bar and a second short bus bar; the first short bus bar is connected in parallel to two adjacent battery sub-strings in the first direction, and the second short bus bar is connected in parallel to two adjacent battery sub-strings in the first direction. Thus, by providing the short bus bars, two battery sub-strings adjacent in the second direction can be partially connected in parallel.

[0025] Furthermore, the plurality of long bus bars include a first long bus bar and a second long bus bar, wherein the first long bus bar and the second long bus bar are respectively used to connect two adjacent battery sub-strings in the first direction in the first battery unit and the second battery unit in parallel; the first short bus bar, the first long bus bar, the second long bus bar, and the second short bus bar are arranged at intervals along the first direction; the first battery unit is connected in parallel with the second battery unit via the first short bus bar, the first long bus bar, the second long bus bar, and the second short bus bar. In this way, the first battery unit and the second battery unit can be connected in parallel via the first short bus bar, the first long bus bar, the second long bus bar, and the second short bus bar.

[0026] Furthermore, the second size of the four-divided battery cell is 40 mm to 58 mm, and the first size of the four-divided battery cell is 150 mm to 250 mm.

[0027] Furthermore, the second size of the four-divided battery cell is 80 mm to 115 mm, and the first size of the four-divided battery cell is 80 mm to 115 mm.

[0028] Furthermore, the photovoltaic assembly further includes an insulating member, which is provided between the four-part battery sheet and the bus bar, and the bus bar includes a long bus bar, a first short bus bar and a second short bus bar.

[0029] An embodiment of the present invention further provides a photovoltaic system, which includes the photovoltaic assembly described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 This is a schematic diagram of the circuit structure of a photovoltaic module provided by one embodiment of the present invention;

[0032] Figure 2 is a schematic structural diagram of a photovoltaic module provided by one embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the circuit structure of battery strings in a photovoltaic module provided by one embodiment of the present invention;

[0034] Figure 4 Schematic diagram of cutting a whole cell into four cell slices according to an embodiment of the present invention;

[0035] Figure 5 Schematic diagram of cutting a whole cell into four cell slices according to another embodiment of the present invention;

[0036] Figure 6 This is a schematic structural diagram of cell strings in a photovoltaic module provided by another embodiment of the present invention;

[0037] Figure 7 This is a schematic structural diagram of cell strings in a photovoltaic module provided by yet another embodiment of the present invention;

[0038] Figure 8This is a schematic diagram of the structure of the battery strings in the photovoltaic module provided by another embodiment of the present invention.

[0039] Figure 9 This is a structural diagram of a photovoltaic module provided by another embodiment of the present invention when an insulating member is provided.

[0040] Explanation of main component symbols: 1000, first battery cell; 2000, second battery cell; 100, first battery string group; 200, second battery string group; 300, third battery string group; 400, fourth battery string group; 500, fifth battery string group; 600, sixth battery string group; 101, battery string; 10, battery sub-string; 20, long bus bar; 11, four-cell battery; 21, first long bus bar; 22, second long bus bar; 31, first short bus bar; 32, second short bus bar; 51, first bypass module; 52, second bypass module; 53, third bypass module; 60, insulating member. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. In addition, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "top", "bottom", "horizontal", "longitudinal", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0044] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or mutual communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0045] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will recognize the application of other processes and / or the use scenarios of other materials.

[0046] Photovoltaic modules are based on the photovoltaic effect of crystalline silicon PN junctions, which can achieve efficient conversion of light energy into electrical energy. The application scenarios of photovoltaic modules cover many fields such as large-scale ground power stations, industrial and commercial roofs, ship power supply, and aerospace. The electrical structure of a typical photovoltaic module is composed of multiple groups of battery strings 101 connected in series and parallel. Among them, the conventional configuration of photovoltaic modules in related technologies usually adopts two groups of six-connected battery strings 101 in parallel. That is, the photovoltaic module is composed of two parallel battery string groups, each battery string group is composed of six battery strings 101 connected in series, and the battery cells in each battery string 101 are half-cell cells of a two-split battery cell structure formed by laser cutting of the whole battery cell. However, the area of ​​the battery cells used in the photovoltaic modules in the prior art is relatively large, so significant internal resistance loss (I 2 R loss, that is, heat loss power), especially when the components are operated under high irradiation intensity conditions, excessive current density will aggravate the ohmic heating effect, resulting in significant efficiency in the overall output power of the photovoltaic components and obvious heat generation.

[0047] In order to solve the above technical problems, Figures 1 to 9As shown, an embodiment of the present invention provides a photovoltaic module, which includes a first battery unit 1000 and a second battery unit 2000 connected in parallel. The first battery unit 1000 includes a first battery string group 100, a second battery string group 200 and a third battery string group 300 connected in series; the second battery unit 2000 includes a fourth battery string group 400, a fifth battery string group 500 and a sixth battery string group 600 connected in series; the first battery string group 100, the second battery string group 200, the third battery string group 300, the fourth battery string group 400, the fifth battery string group 500 and the sixth battery string group 600 each include two battery strings 101 connected in series, and the battery string 101 includes two battery sub-strings 10 connected in parallel; the battery sub-string 10 includes a plurality of quartered battery cells 11 connected in series, and the quartered battery cell 11 is a quarter battery cell cut from a whole battery cell.

[0048] Thus, in the photovoltaic module of the embodiment of the present invention, the applicant arranges the cell in the photovoltaic module to be a quarter cell cut from a whole cell, thereby reducing the area of ​​the cell in the photovoltaic module, reducing the power generation current of the single cell, and further reducing the internal power loss of the single cell, reducing the overall power loss of the photovoltaic module, and thus improving the output power of the photovoltaic module. In addition, the photovoltaic module of the embodiment of the present invention is designed by arranging the battery cells in parallel, and each battery cell includes a circuit design of a plurality of battery strings 101 connected in series, thereby reducing the power loss of the photovoltaic module while making the overall output current and the overall output voltage of the photovoltaic module in this embodiment equal to the overall output current and the overall output voltage of the existing photovoltaic module using half-cell cells, thereby avoiding the reduction of the output current and output voltage of the photovoltaic module in the embodiment of the present invention, and thus improving the output power of the embodiment of the present invention.

[0049] It is understandable that the voltage of a solar cell is independent of its area, while the current is proportional to its area. Therefore, the voltage of the quartered cell 11 formed by cutting a whole solar cell is the same as the voltage of the whole solar cell, and the current of the quartered cell 11 is one-fourth of that of the whole solar cell, and the current of the quartered cell 11 is one-half of that of a half-cell solar cell. Compared to a half-cell cell, the quartered cell 11 can significantly reduce internal losses, which is beneficial for photovoltaic modules to increase power generation. At the same time, the quartered cell 11 can also reduce size and reduce welding warping, thereby reducing the risks of paralleling, hidden cracks, misalignment of the cell string 101, and insufficient creepage distance.

[0050] Among them, the types of the quadrant cell 11 in the embodiment of the present application include but are not limited to Passivated Emitter Rear Cell (PERC), Tunnel Oxide Passivated Contact Cell (TOPCON), Heterojunction with Intrinsic Thin-layer (HIT), Back Contact Cell (BC), Perovskite Solar Cells (PSC), etc. In this embodiment, the type of the quadrant cell 11 in the photovoltaic module is not specifically limited.

[0051] It is understood that the photovoltaic module in the embodiment of the present invention specifically includes two battery cells connected in parallel, each battery cell includes multiple battery strings connected in series, each battery string group includes multiple battery strings 101, each battery string 101 includes two battery sub-strings 10 connected in parallel, and each battery sub-string 10 includes multiple quadrants 11 connected in series. While the quadrants 11 can significantly reduce the internal resistance of a single battery cell, they also reduce the current of a single battery cell. To avoid a decrease in the overall output current of the photovoltaic module, the present invention implements current capacity compensation through a multi-stage parallel topology design. First, by connecting two battery sub-strings 10 in parallel to form a battery string 101, the current of a single battery string 101 can be increased. Subsequently, multiple battery strings 101 are connected in series to form individual battery string groups. Subsequently, multiple battery string 101 groups are connected in series to form a first battery cell 1000 and a second battery cell 2000. Finally, the first battery cell 1000 and the second battery cell 2000 are connected in parallel to form a photovoltaic module, thereby further increasing the total output current of the photovoltaic module. Therefore, the present invention uses a two-stage current superposition mechanism to ultimately achieve that the total output current of the photovoltaic module with a quartered cell 11 is equivalent to the total output current of the photovoltaic module with a half-cell cell.

[0052] At the same time, the multi-stage series topology design of the photovoltaic module in the embodiment of the present invention realizes voltage capacity compensation. First, the two battery strings 10 are connected in parallel to form a battery string 101, and then multiple battery strings 101 are connected in series to form a battery string group, so that the voltage of the battery string group can be increased. Then, multiple battery strings 101 are connected in series to form a battery string group, so that the total output voltage of the battery string group is further increased. Finally, the first battery unit 1000 and the second battery unit 2000 are connected in parallel to form a photovoltaic module, which will not affect the total output voltage of the photovoltaic module, and can achieve the total output voltage of the four-cell 11 photovoltaic module and the total output voltage of the half-cell photovoltaic module to be equivalent.

[0053] Therefore, the multi-stage series and multi-stage parallel design of the photovoltaic modules in the embodiment of the present invention can achieve voltage capacity compensation and current capacity compensation, so that the total output current and total output voltage of the photovoltaic modules remain unchanged.

[0054] In addition, the multi-stage parallel topology design of the photovoltaic module in the embodiment of the present invention can further reduce the total resistance of the photovoltaic module. First, the two battery strings 10 in the battery string 101 are connected in parallel, thereby reducing the resistance of each battery string 101; then, the two battery units are connected in parallel through the photovoltaic module as a whole, so that the total resistance of the photovoltaic module is further reduced, thereby reducing the power loss of the photovoltaic module.

[0055] Therefore, the photovoltaic modules of the embodiments of the present invention can reduce the power loss of the photovoltaic modules while maintaining the same total output current and total output voltage, thereby increasing the output power of the photovoltaic modules. Furthermore, maintaining the same total output current and total output voltage of the photovoltaic modules allows the photovoltaic modules of the embodiments of the present invention to maintain the same output voltage and current as conventional modules, allowing the photovoltaic modules of the embodiments of the present invention to be directly connected to existing photovoltaic systems without modifying the power infrastructure.

[0056] Specifically, the photovoltaic module in the present application can increase the overall output power of the photovoltaic module by 2% to 10% compared to the photovoltaic module with half-cell cells in the prior art.

[0057] Specifically, the photovoltaic module includes a first battery unit 1000 and a second battery unit 2000 connected in parallel. The first battery unit 1000 includes three battery string groups connected in series. The second battery unit 2000 includes three battery string groups connected in series. Each battery string group includes two battery strings 101 connected in series. Each battery string 101 includes two battery sub-strings 10 connected in parallel. Each battery sub-string 10 includes 8 to 15 quadrant battery cells 11 connected in series. The number of quadrant battery cells 11 in the battery sub-string 10 can be 8, 9, 10, 11, 12, 13, 14, or 15.

[0058] In one possible embodiment, the first battery unit 1000 and the second battery unit 2000 are arranged along a first direction. Each of the first battery unit 1000 and the second battery unit 2000 includes a plurality of battery strings 10 arranged along a second direction, with the second direction intersecting the first direction. This allows the photovoltaic assembly to be arranged in an array, so that the dimensions of the photovoltaic assembly in the embodiment of the present application are the same as those of conventional assemblies. Consequently, the photovoltaic assembly in the embodiment of the present application does not require special processes or steps during production or assembly, reducing the difficulty of production or assembly.

[0059] like Figure 1 and Figure 2As shown, further, the first battery string group 100, the second battery string group 200, and the third battery string group 300 in the first battery unit 1000 are arranged along the second direction, the fourth battery string group 400, the fifth battery string group 500, and the sixth battery string group 600 in the second battery unit 2000 are arranged along the second direction, and the battery sub-strings 10 in each battery string group are also arranged along the second direction.

[0060] In one possible embodiment, the number of battery strings 101 in the first battery string group 100, the second battery string group 200, the third battery string group 300, the fourth battery string group 400, the fifth battery string group 500, and the sixth battery string group 600 is the same. In this way, the battery strings can be evenly distributed in the photovoltaic module, which can reduce stress concentration in the photovoltaic module and reduce the risk of hidden cracks and fragments of the quartered battery cells 11 in the photovoltaic module.

[0061] Furthermore, the number of cell sub-strings 10 in each cell string 101 is the same. This allows the cell strings to be evenly distributed in the photovoltaic module, reducing stress concentration in the photovoltaic module and lowering the risk of cracks and fragments in the quartered cell sheets 11 in the photovoltaic module.

[0062] like Figures 1 to 3 As shown, in one possible embodiment, the number of quadrant cells 11 in each cell string 10 is the same. This ensures consistent output voltage and current across all cell strings 10, facilitating standardized layout and electrical matching across all cell strings 101 in the photovoltaic module, simplifying the placement of solder strip wiring and bypass modules. This also facilitates unified wiring design, facilitating rapid switching and debugging of automated production equipment, and eliminating the need to differentiate between wiring patterns for different strings during on-site installation and maintenance, thereby improving photovoltaic module setup efficiency.

[0063] like Figure 4 As shown, in one possible embodiment, the first dimension L3 of the quartered cell 11 is the same as the first dimension L4 of the entire cell, and the ratio of the second dimension L1 of the quartered cell 11 to the second dimension L2 of the entire cell is 1:4. This can further reduce the resistance of a single quartered cell 11, thereby further reducing the power loss of the photovoltaic module.

[0064] It is understood that the first size and second size of a cell refer to the size of the cell in two mutually perpendicular directions. For example, the first size L3 of a quartered cell 11 may be the size of the quartered cell in the horizontal direction, and the second size L2 of the quartered cell 11 may be the size of the quartered cell in the vertical direction. Alternatively, the first size L3 of a quartered cell 11 may be the size of the quartered cell in the vertical direction, and the second size L2 of the quartered cell 11 may be the size of the quartered cell in the horizontal direction.

[0065] Specifically, if Figure 4 As shown, the quartered cell 11 may be a quarter of a cell formed by cutting a whole cell in a "M-shaped" manner.

[0066] It is understandable that due to existing production processes, the ratio of the second dimension L1 of the quartered cell 11 to the second dimension L2 of the entire cell may not be an absolutely accurate 1:4. For example, if the ratio of the second dimension L1 of the quartered cell 11 to the second dimension L2 of the entire cell is within a range of 0.245 to 0.255, it can also be considered that the ratio of the second dimension L1 of the quartered cell 11 to the second dimension L2 of the entire cell is 1:4.

[0067] It is understandable that due to existing production processes, the first dimension L3 of the quartered cell 11 may not be exactly the same as the first dimension L4 of the whole cell. For example, if the difference between the first dimension L3 of the quartered cell 11 and the first dimension L4 of the whole cell is within 1 mm, the first dimension L3 of the quartered cell 11 may be considered to be the same as the first dimension L4 of the whole cell.

[0068] It can be understood that the resistance of the battery cell is inversely proportional to the cross-sectional area. In the embodiment of the present invention, the first dimension L3 of the quartered battery cell 11 is the same as the first dimension L4 of the whole battery cell, and the ratio of the second dimension L1 of the quartered battery cell 11 to the second dimension L2 of the whole battery cell is 1:4. According to the resistance calculation formula Calculation shows that the cross-sectional area of ​​the quartered cell 11 remains unchanged due to the unchanged first dimension L3, while the change in the second dimension causes the second dimension L1 of the cut cell to become one-fourth of the previous one, so that the resistance of the quartered cell 11 can be one-fourth of the resistance of the whole cell, and the resistance of the quartered cell 11 is one-half of the resistance of the half cell, thereby further reducing the power loss of the photovoltaic module and further increasing the output power of the photovoltaic module.

[0069] In some embodiments, the first dimension can be used as the width direction and the second dimension can be used as the length direction. When the length directions of the four sides of the battery cell are the same, the length direction and the width direction can be ignored. Therefore, the first dimension can also be used as the length direction and the second dimension can be used as the width direction.

[0070] Furthermore, the first size L3 of the quartered cell 11 may be 150 mm to 250 mm, for example, 150 mm, 180 mm, 190 mm, 200 mm, 210 mm, 220 mm, 230 mm, 240 mm, or 250 mm.

[0071] Furthermore, the second size L1 of the quartered battery cell 11 may be 40 mm to 58 mm, for example, 40 mm, 42 mm, 45 mm, 48 mm, 50 mm, 52 mm, 55 mm, or 58 mm.

[0072] like Figure 5 As shown, in a possible embodiment, the ratio of the first size L3 of the quartered cell 11 to the first size L4 of the whole cell is 1:2, and the ratio of the second size L1 of the quartered cell 11 to the second size L2 of the whole cell is 1:2. According to the resistance calculation formula Calculation shows that since the first dimension L3 becomes half of the previous one, the cross-sectional area of ​​the quartered cell 11 is reduced to half of the previous one, and the second dimension change causes the second dimension L1 of the cut cell to become one quarter of the previous one, so that the resistance of the quartered cell 11 remains unchanged, which is beneficial to maintaining the overall load balance of the component.

[0073] Specifically, if Figure 5 As shown, the quartered cell 11 may be a quarter of a cell formed by cutting a whole cell in a "T-shaped" pattern.

[0074] Furthermore, by setting the ratio of the first dimension L3 of the quartered cell 11 to the first dimension L4 of the entire cell at 1:2, and the ratio of the second dimension L1 of the quartered cell 11 to the second dimension L2 of the entire cell at 1:2, the second dimension of the photovoltaic module can be made narrower, while the first dimension of the photovoltaic module can be made longer, thereby enabling the photovoltaic module to cope with applications such as strip layouts. This allows the photovoltaic module to be used in applications such as curved roofs and irregularly shaped building surfaces, thereby increasing its application flexibility.

[0075] It is understandable that due to existing production processes, the ratio of the second dimension L1 of the quartered cell 11 to the second dimension L2 of the entire cell may not be an absolutely accurate 1:2. For example, if the ratio of the second dimension L1 of the quartered cell 11 to the second dimension L2 of the entire cell is within a range of 0.455 to 0.555, it can also be considered that the ratio of the second dimension L1 of the quartered cell 11 to the second dimension L2 of the entire cell is 1:2.

[0076] It is understandable that due to existing production processes, the ratio of the first dimension L3 of the quartered cell 11 to the first dimension L4 of the entire cell may not be an absolutely accurate 1:2. For example, if the ratio of the first dimension L3 of the quartered cell 11 to the first dimension L4 of the entire cell is within a range of 0.455 to 0.555, it can also be considered that the ratio of the first dimension L3 of the quartered cell 11 to the first dimension L4 of the entire cell is 1:2.

[0077] Furthermore, the first size L3 of the quartered cell 11 may be 80 mm to 115 mm, for example, 80 mm, 85 mm, 90 mm, 95 mm, 100 mm, 105 mm, 110 mm, or 115 mm.

[0078] Furthermore, the second size L1 of the quartered cell 11 may be 80 mm to 115 mm, for example, 80 mm, 85 mm, 90 mm, 95 mm, 100 mm, 105 mm, 110 mm, or 115 mm.

[0079] In a possible implementation, the first end of the first battery string group 100 is connected to the first end of the fourth battery string group 400 ; and the second end of the first battery string group 100 is connected to the second end of the fourth battery string group 400 .

[0080] In one possible embodiment, the photovoltaic assembly further includes a first bypass module 51. The output end of the first bypass module 51 is connected to the first end of the first battery string group 100 and the first end of the fourth battery string group 400, and the input end of the first bypass module 51 is connected to the second end of the first battery string group 100 and the second end of the fourth battery string group 400. Furthermore, the first bypass module 51 is a diode.

[0081] In this way, the first bypass module 51 is connected in parallel with the first battery string group 100 and the fourth battery string group 400, respectively, and the first bypass module 51 can function as a bypass. When there are a large number of obstructed quadrants 11 in the first battery string group 100 and the fourth battery string group 400, i.e., abnormal quadrants 11, the first bypass module 51 can be turned on to bypass the first battery string group 100 and the fourth battery string group 400, thereby preventing the reverse bias generated by the battery cells and the loss of the battery cells in the first battery string group 100 and the fourth battery string group 400.

[0082] Specifically, the first battery string group 100 is connected in parallel with the fourth battery string group 400, and the first battery string group 100 and the fourth battery string group 400 are connected at one end of the same polarity. Furthermore, the first end of the first battery string group 100 is connected in parallel with the first end of the fourth battery string group 400, and the second end of the first battery string group 100 is connected in parallel with the second end of the fourth battery string group 400. For example, the first end of the first battery string group 100 and the first end of the fourth battery string group 400 are both positive electrodes, and the second end of the first battery string group 100 and the second end of the fourth battery string group 400 are both negative electrodes; or, the first end of the first battery string group 100 and the first end of the fourth battery string group 400 are both negative electrodes, and the second end of the first battery string group 100 and the second end of the fourth battery string group 400 are both positive electrodes. That is, the positive terminal of the first battery string group 100 is connected to the positive terminal of the fourth battery string group 400, and the negative terminal of the first battery string group 100 is connected to the negative terminal of the fourth battery string group 400.

[0083] In one possible embodiment, the first end of the second battery string group 200 is connected to the first end of the fifth battery string group 500, the second end of the second battery string group 200 is connected to the second end of the fifth battery string group 500, the first end of the second battery string group 200 is also connected to the second end of the first battery string group 100, and the first end of the fifth battery string group 500 is also connected to the second end of the fourth battery string group 400.

[0084] In one possible embodiment, the photovoltaic assembly further includes a second bypass module 52; an output end of the second bypass module 52 is connected to the first end of the second battery string group 200 and the first end of the fifth battery string group 500, and an input end of the second bypass module 52 is connected to the second end of the second battery string group 200 and the second end of the fifth battery string group 500. Furthermore, the second bypass module 52 is a diode.

[0085] In this way, the second bypass module 52 is connected in parallel with the second battery string group 200 and the fifth battery string group 500, respectively, and the second bypass module 52 can function as a bypass. When a large number of obstructed quadrants 11, i.e., abnormal quadrants 11, occur in the second battery string group 200 and the fifth battery string group 500, the second bypass module 52 can be turned on to bypass the second battery string group 200 and the fifth battery string group 500, thereby preventing the battery cells from experiencing reverse bias and damaging the battery cells in the second battery string group 200 and the fifth battery string group 500.

[0086] Specifically, the second battery string group 200 is connected in parallel with the fifth battery string group 500, and the second battery string group 200 and the fifth battery string group 500 are connected at one end of the same polarity. Furthermore, the first end of the second battery string group 200 is connected in parallel with the first end of the fifth battery string group 500, and the second end of the second battery string group 200 is connected in parallel with the second end of the fifth battery string group 500. For example, the first end of the second battery string group 200 and the first end of the fifth battery string group 500 are both positive electrodes, and the second end of the second battery string group 200 and the second end of the fifth battery string group 500 are both negative electrodes; or, the first end of the second battery string group 200 and the first end of the fifth battery string group 500 are both negative electrodes, and the second end of the second battery string group 200 and the second end of the fifth battery string group 500 are both positive electrodes. That is, the positive end of the second battery string group 200 is connected to the positive end of the fifth battery string group 500, and the negative end of the second battery string group 200 is connected to the negative end of the fifth battery string group 500.

[0087] Specifically, the second battery string group 200 is connected in series with the first battery string group 100, and the second battery string group 200 is connected to an end of the first battery string group 100 with an opposite polarity. The positive terminal of the second battery string group 200 is connected to the negative terminal of the first battery string group 100, or the negative terminal of the second battery string group 200 is connected to the positive terminal of the first battery string group 100.

[0088] Specifically, the fifth battery string group 500 is connected in series with the fourth battery string group 400, and the fifth battery string group 500 is connected to one end of the fourth battery string group 400 with an opposite polarity. The positive terminal of the fifth battery string group 500 is connected to the negative terminal of the fourth battery string group 400, or the negative terminal of the fifth battery string group 500 is connected to the positive terminal of the fourth battery string group 400.

[0089] In one possible embodiment, the first end of the third battery string group 300 is connected to the first end of the sixth battery string group 600; the first end of the third battery string group 300 is also connected to the second end of the second battery string group 200, the first end of the sixth battery string group 600 is also connected to the second end of the fifth battery string group 500, and the second end of the third battery string group 300 is connected to the second end of the sixth battery string group 600.

[0090] In one possible embodiment, the photovoltaic assembly further includes a third bypass module 53; an output end of the third bypass module 53 is connected to the first end of the third battery string group 300 and the first end of the sixth battery string group 600, and an input end of the third bypass module 53 is connected to the second end of the third battery string group 300 and the second end of the sixth battery string group 600. Furthermore, the third bypass module 53 is a diode.

[0091] In this way, the third bypass module 53 is connected in parallel with the third battery string group 300 and the sixth battery string group 600, respectively, and the third bypass module 53 can function as a bypass. When a large number of obstructed quadrants 11, i.e., abnormal quadrants 11, occur in the third battery string group 300 and the sixth battery string group 600, the third bypass module 53 can be turned on to bypass the third battery string group 300 and the sixth battery string group 600, thereby preventing the battery cells from experiencing reverse bias and damaging the battery cells in the third battery string group 300 and the sixth battery string group 600.

[0092] Specifically, the third battery string group 300 is connected in parallel with the sixth battery string group 600, and the third battery string group 300 and the sixth battery string group 600 are connected at one end of the same polarity. Furthermore, the first end of the third battery string group 300 is connected in parallel with the first end of the sixth battery string group 600, and the second end of the third battery string group 300 is connected in parallel with the second end of the sixth battery string group 600. For example, the first end of the third battery string group 300 and the first end of the sixth battery string group 600 are both positive electrodes, and the second end of the third battery string group 300 and the second end of the sixth battery string group 600 are both negative electrodes; or, the first end of the third battery string group 300 and the first end of the sixth battery string group 600 are both negative electrodes, and the second end of the third battery string group 300 and the second end of the sixth battery string group 600 are both positive electrodes. That is, the positive end of the third battery string group 300 is connected to the positive end of the sixth battery string group 600, and the negative end of the third battery string group 300 is connected to the negative end of the sixth battery string group 600.

[0093] Specifically, the third battery string group 300 is connected in series with the second battery string group 200, and the third battery string group 300 is connected to one end of the second battery string group 200 with an opposite polarity. The positive terminal of the third battery string group 300 is connected to the negative terminal of the second battery string group 200, or the negative terminal of the third battery string group 300 is connected to the positive terminal of the second battery string group 200.

[0094] Specifically, the sixth battery string group 600 is connected in series with the fifth battery string group 500, and the sixth battery string group 600 is connected to an end of the fifth battery string group 500 with an opposite polarity. The positive terminal of the sixth battery string group 600 is connected to the negative terminal of the fifth battery string group 500, or the negative terminal of the sixth battery string group 600 is connected to the positive terminal of the fifth battery string group 500.

[0095] In the above embodiment, the number of battery sub-strings 10 in each battery string group is the same, and the number of quadrant battery cells 11 in each battery sub-string 10 is equal, so that the number of battery cells protected by the first bypass module 51, the second bypass module 52 and the third bypass module 53 is equal, which can improve the working stability of the three bypass modules and further improve the protection effect of the three bypass modules on the photovoltaic components.

[0096] like Figure 6 and Figure 7As shown, in one possible embodiment, in each battery string 10, two adjacent quadrants 11 have an overlapping area, and the dimension K of the overlapping area in the first direction is 0.1mm to 10mm. For example, it is 0.1mm, 0.2mm, 0.3mm, 0.5mm, 0.8mm, 1mm, 2mm, 5mm, 8mm, or 10mm. In this way, the spacing between the quadrants 11 in the battery string 10 can be reduced, allowing more battery cells to be placed in the battery string 10, thereby improving the efficiency of the battery string 10.

[0097] It can be understood that the dimension K of the overlapping area of ​​two adjacent quarter-cells 11 in the first direction cannot be too large or too small. When the dimension K of the overlapping area in the first direction is less than 0.1 mm, the requirements for the manufacturing process are high, and it is impossible to add more cells to the battery string 10, which has a small improvement in the utilization efficiency of the battery string 10; when the dimension K of the overlapping area in the first direction is greater than 10 mm, the overlapping area between adjacent quarter-cells 11 is too large, resulting in an excessively large area of ​​mutual shading between the quarter-cells 11, reducing the photoelectric conversion efficiency of the quarter-cells 11, thereby reducing the efficiency of the photovoltaic module.

[0098] like Figure 8 As shown, in one possible embodiment, in each battery string 10, two adjacent quadrant cells 11 have a first spacing D in a first direction, and the first spacing D is less than 5 mm. For example, the spacing D is 0.1 mm, 0.2 mm, 0.3 mm, 0.5 mm, 0.8 mm, 1 mm, 2 mm, 3 mm, 4 mm, or 4.5 mm. In this way, adjacent quadrant cells 11 in the battery string 10 can have a certain spacing, preventing adjacent quadrant cells 11 from blocking each other, thereby improving the photoelectric conversion efficiency of the photovoltaic module.

[0099] It is understood that the spacing between two adjacent quadrant cells 11 in the first direction cannot be too large. If the spacing between two adjacent quadrant cells 11 in the first direction is greater than 5 mm, the light absorption rate of the photovoltaic module will be reduced, thereby reducing the efficiency of the photovoltaic module. It will also result in fewer cells being able to be placed in the battery string 10, thereby reducing the efficiency of the battery string 10.

[0100] like Figure 2As shown, in a possible embodiment, the photovoltaic component further includes a plurality of long bus bars 20. In the first battery unit 1000, two battery strings 101 adjacent along the second direction are connected in series through the long bus bar 20, and the long bus bar 20 is also used to connect two battery sub-strings 10 adjacent in the second direction in the battery string 101 in parallel; in the second battery unit 2000, two battery strings 101 adjacent along the second direction are connected in series through the long bus bar 20, and the long bus bar 20 is also used to connect two battery sub-strings 10 adjacent in the second direction in the battery string 101 in parallel.

[0101] Furthermore, the long bus bar 20 is also used to connect in parallel two adjacent battery strings 10 in the first direction in the first battery unit 1000 and the second battery unit 2000 .

[0102] In this way, by disposing each long bus bar 20 , two battery strings 101 adjacent in the second direction can be connected in series, and two battery sub-strings 10 adjacent in the second direction in the battery string 101 can also be connected in parallel.

[0103] Specifically, the long busbar 20 is specifically connected to the welding ribbons of the first battery cell 1000 and the second battery cell 2000. In the first battery cell 1000 and the second battery cell 2000, the long busbar 20 can realize the series connection of two adjacent battery strings 101 in the second direction. Moreover, for each long busbar 20, in the first battery cell 1000 and the second battery cell 2000, the long busbar 20 can also realize the parallel connection of two adjacent battery sub-strings 10 in the battery string 101 in the second direction. In other words, the long busbar 20 can first realize the parallel connection of two battery sub-strings 10 in some battery strings 101, and the long busbar 20 can also realize the series connection of two adjacent battery strings 101 in the second direction. Therefore, the long busbar 20 can have the functions of both parallel connection of battery sub-strings 10 and series connection of battery strings 101, thereby reducing the number of busbars in the photovoltaic module and further reducing the production cost of the photovoltaic module.

[0104] Furthermore, the plurality of long bus bars 20 include a first long bus bar 21 and a second long bus bar 22. The first long bus bar 21 and the second long bus bar 22 are disposed in the middle of the photovoltaic module. The first long bus bar 21 and the second long bus bar 22 are respectively used to connect in parallel two battery strings 101 adjacent in the first direction in the first battery unit 1000 and the second battery unit 2000. The first long bus bar 21 and the second long bus bar 22 can realize the series connection of two battery strings 101 adjacent in the second direction in the first battery unit 1000, and can also realize the series connection of two battery strings 101 adjacent in the second direction in the second battery unit 2000.

[0105] Optionally, the long bus bar 20 can be arranged on the side or back of the quartered cell 11 in the photovoltaic module. In this way, a variety of arrangement positions of the long bus bar 20 are provided, which can adapt to more actual production scenarios.

[0106] It is understandable that when the long bus bar 20 is arranged on the side of the cell in the photovoltaic module, the long bus bar 20 can avoid blocking the quartered cell 11 and thus preventing the quartered cell 11 from receiving light.

[0107] It can be understood that when the long bus bar 20 is arranged on the back of the cell in the photovoltaic module, the effect of hiding the long bus bar 20 can be achieved, thereby improving the aesthetics of the photovoltaic module, and the space occupied by the long bus bar 20 can also be reduced, thereby reducing the size of the photovoltaic module, which is conducive to reducing costs.

[0108] In one possible embodiment, a first short bus bar 31 and a second short bus bar 32 are further included; the first short bus bar 31 is connected in parallel to two adjacent battery sub-strings 10 in the second direction, and the second short bus bar 32 is connected in parallel to two adjacent battery sub-strings 10 in the second direction. In this way, by providing each short bus bar, two adjacent battery sub-strings 10 in the second direction can be partially connected in parallel.

[0109] Specifically, the first short bus bar 31 can realize the parallel connection of the two battery sub-strings 10 in the first battery string group 100, and the first short bus bar 31 can also realize the parallel connection of the two battery sub-strings 10 in the fourth battery string group 400. The second short bus bar 32 can realize the parallel connection of the two battery sub-strings 10 in the third battery string group 300, and the second short bus bar 32 can also realize the parallel connection of the two battery sub-strings 10 in the sixth battery string group 600.

[0110] Optionally, the first short bus bar 31 and the second short bus bar 32 can be arranged on the side or back of the quadrant cell 11 in the photovoltaic module. In this way, a variety of arrangement positions of the first short bus bar 31 and the second short bus bar 32 are provided to adapt to more actual production scenarios.

[0111] It is understandable that when the first short bus bar 31 and the second short bus bar 32 are arranged on the side of the cell in the photovoltaic module, the first short bus bar 31 and the second short bus bar 32 will not block the four-part cell 11, thereby avoiding affecting the light exposure of the four-part cell 11.

[0112] It can be understood that when the first short bus bar 31 and the second short bus bar 32 are arranged on the back of the battery cell in the photovoltaic module, the first short bus bar 31 and the second short bus bar 32 can be hidden, thereby improving the aesthetics of the photovoltaic module, and can also reduce the space occupied by the first short bus bar 31 and the second short bus bar 32, thereby reducing the size of the photovoltaic module, which is conducive to reducing costs.

[0113] In one possible embodiment, the plurality of long bus bars 20 include a first long bus bar 21 and a second long bus bar 22. The first short bus bar 31, the first long bus bar 21, the second long bus bar 22, and the second short bus bar 32 are arranged in a spaced relationship along a first direction. The first battery unit 1000 is connected in parallel with the second battery unit 2000 via the first short bus bar 31, the first long bus bar 21, the second long bus bar 22, and the second short bus bar 32. Thus, the first battery unit 1000 and the second battery unit 2000 are connected in parallel via the first short bus bar 31, the first long bus bar 21, the second long bus bar 22, and the second short bus bar 32.

[0114] Furthermore, in addition to enabling the parallel connection of two battery strings 10, the first short bus bar 31 and the second short bus bar 32 can also serve the function of parallel connection of the first battery unit 1000 and the second battery unit 2000. This can reduce the number of bus bars in the photovoltaic module, thereby reducing the manufacturing cost of the photovoltaic module.

[0115] Furthermore, in addition to connecting two battery sub-strings 10 in parallel and two battery strings 101 in series, the first and second long busbars 21 and 22 can also connect the first and second battery units 1000 and 2000 in parallel. This reduces the number of busbars in a photovoltaic module, thereby reducing the manufacturing cost of the photovoltaic module.

[0116] like Figure 9 As shown, further, two adjacent quadrants 11 in a cell string 10 have an overlapping region, and the photovoltaic module further includes an insulating member 60, which is disposed between the quadrants 11 and the busbars. The busbars include a long busbar 20, a first short busbar 31, and a second short busbar 32. Specifically, two adjacent quadrants 11 in each cell string 10 have an overlapping region. Because each busbar needs to be disposed on the surface of the cell, an insulating member is required between each busbar and the cell to provide insulation, thereby avoiding the risk of short-circuiting the busbars and improving the efficiency of the photovoltaic module.

[0117] It is understood that the insulating member 60 can be configured as a long strip that matches the size of each busbar, and the insulating member 60 can be perforated where conductive connection with the four-cell battery 11 is required so that conductive connection can be made with the corresponding area of ​​the four-cell battery 11, and insulated from areas where no conductive connection is required. Alternatively, the insulating member 60 can be configured to match the size of the area of ​​the four-cell battery 11 that needs to be insulated, so that the volume of the insulating member 60 is reduced and the cost is reduced. This application does not impose any restrictions on this.

[0118] In one possible embodiment, the photovoltaic assembly further includes a first junction box, a second junction box, and a third junction box. The first bypass module 51 is housed in the first junction box, the second bypass module 52 is housed in the second junction box, and the third bypass module 53 is housed in the third junction box. In this way, the bypass modules can be housed in the junction boxes, thereby protecting the bypass modules.

[0119] In one possible embodiment, the quartered cells 11 in a photovoltaic module are all made of solar cells of the same area, divided into four equal parts at the same ratio. This way, all quartered cells 11 in the photovoltaic module have the same current, and the voltage is unaffected, resulting in the same power. No further processing for current or power matching is required.

[0120] Specifically, the four-part cell 11 can be a busbar cell or a busbar-less cell.

[0121] Furthermore, the whole cells of all the quartered cells 11 in the photovoltaic module may be of the same type or different types; and may be of the same area or different areas.

[0122] Specifically, after being packaged, the photovoltaic modules can be formed into photovoltaic modules. The photovoltaic modules can be double-glass modules or single-glass modules. The photovoltaic modules can have a 54-inch, 60-inch, 72-inch, or other formats. The specific form of the photovoltaic modules is not limited here.

[0123] Furthermore, it is understood that in such an embodiment, the photovoltaic module may further include a frame, a backsheet, photovoltaic glass, and an adhesive film. The adhesive film may be placed between the front and back surfaces of the cells, the photovoltaic glass, and adjacent cells. As a filler, it may be a transparent colloid with good light transmittance and aging resistance. For example, the adhesive film may be EVA film or POE film. The specific choice may be based on actual conditions and is not limited here.

[0124] Photovoltaic glass can cover the adhesive film on the front of the cell. The photovoltaic glass can be ultra-clear glass, which has high light transmittance and transparency, as well as excellent physical, mechanical, and optical properties. For example, ultra-clear glass can have a light transmittance of over 92%, protecting the cell while minimizing the impact on cell efficiency. The adhesive film also bonds the photovoltaic glass and cell together, providing sealing, insulation, and waterproofing.

[0125] The backsheet can be attached to the film on the back of the solar cell. The backsheet protects and supports the solar cell and offers reliable insulation, water resistance, and aging resistance. Multiple backsheet options are available, typically including tempered glass, organic glass, and aluminum alloy TPT composite film. The specific backsheet configuration can be tailored to the specific situation and is not limited here. The backsheet, solar cell, film, and photovoltaic glass assembly can be mounted on a frame. The frame serves as the primary external support structure for the entire photovoltaic module and provides stable support and installation. For example, the frame allows the photovoltaic module to be installed in the desired location.

[0126] The photovoltaic system of the embodiment of the present application includes the photovoltaic components described above. In this embodiment, the photovoltaic system can be applied to photovoltaic power stations, such as ground power stations, rooftop power stations, water surface power stations, etc., and can also be applied to equipment or devices that use solar energy to generate electricity, such as user solar power supplies, solar street lights, solar cars, solar buildings, etc. Of course, it can be understood that the application scenarios of the photovoltaic system are not limited to this, that is, the photovoltaic system can be applied in all fields that require solar energy to generate electricity. Taking the photovoltaic power generation system network as an example, the photovoltaic system may include a photovoltaic array, a junction box and an inverter. The photovoltaic array can be an array combination of multiple photovoltaic components. For example, multiple photovoltaic components can form multiple photovoltaic arrays. The photovoltaic array is connected to the junction box. The junction box can converge the current generated by the photovoltaic array. The converged current flows through the inverter to convert it into the alternating current required by the mains power grid and then connected to the mains power network to achieve solar power supply.

[0127] Throughout this specification, reference to terms such as "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is included in at least one embodiment or example of the present application. In this specification, the illustrative use of the above terms does 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 any one or more embodiments or examples.

[0128] In addition, the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A photovoltaic module, characterized in that: The photovoltaic module comprises: A first battery unit and a second battery unit connected in parallel, wherein the first battery unit includes a first battery string group, a second battery string group, and a third battery string group connected in series; and the second battery unit includes a fourth battery string group, a fifth battery string group, and a sixth battery string group connected in series; The first battery string group, the second battery string group, the third battery string group, the fourth battery string group, the fifth battery string group, and the sixth battery string group each include two battery strings connected in series, and the battery string includes two battery sub-strings connected in parallel; The battery string includes a plurality of quartered battery cells connected in series, and the quartered battery cell is a quarter battery cell cut from a whole battery cell.

2. The photovoltaic module according to claim 1, characterized in that The first size of the quartered battery cell is the same as the first size of the whole battery cell, and the ratio of the second size of the quartered battery cell to the second size of the whole battery cell is 1:

4.

3. The photovoltaic module according to claim 1, characterized in that The ratio of the first size of the quartered battery cell to the first size of the whole battery cell is 1:2, and the ratio of the second size of the quartered battery cell to the second size of the whole battery cell is 1:

2.

4. The photovoltaic module according to any one of claims 2 or 3, characterized in that: One of the first dimension and the second dimension is a length, and the other is a width.

5. The photovoltaic module according to claim 1, characterized in that The first end of the first battery string group is connected to the first end of the fourth battery string group, and the second end of the first battery string group is connected to the second end of the fourth battery string group.

6. The photovoltaic module according to claim 5, characterized in that: Also included is a first bypass module, wherein an output end of the first bypass module is connected to a first end of the first battery string group and a first end of the fourth battery string group; An input end of the first bypass module is connected to the second end of the first battery string group and the second end of the fourth battery string group.

7. The photovoltaic module according to claim 6, characterized in that: The first end of the second battery string group is connected to the first end of the fifth battery string group, the first end of the second battery string group is also connected to the second end of the first battery string group, the first end of the fifth battery string group is also connected to the second end of the fourth battery string group; the second end of the second battery string group is connected to the second end of the fifth battery string group.

8. The photovoltaic module according to claim 7, characterized in that: Also included is a second bypass module; The output end of the second bypass module and the first end of the second battery string group are connected to the first end of the fifth battery string group; An input end of the second bypass module and a second end of the second battery string group are connected to a second end of the fifth battery string group.

9. The photovoltaic module according to claim 8, characterized in that: The first end of the third battery string group is connected to the first end of the sixth battery string group; the first end of the third battery string group is also connected to the second end of the second battery string group, and the first end of the sixth battery string group is also connected to the second end of the fifth battery string group; the second end of the third battery string group is connected to the second end of the sixth battery string group.

10. The photovoltaic module according to claim 9, characterized in that: Also included is a third bypass module; The output end of the third bypass module and the first end of the third battery string group are connected to the first end of the sixth battery string group; An input end of the third bypass module and a second end of the third battery string group are connected to the second end of the sixth battery string group.

11. The photovoltaic module according to claim 1, characterized in that: The first battery cell and the second battery cell are arranged along a first direction; The first battery unit and the second battery unit each include a plurality of battery strings arranged along a second direction, and the second direction intersects the first direction.

12. The photovoltaic module according to claim 1, characterized in that In each of the battery strings, the number of the four battery cells is the same.

13. The photovoltaic module according to claim 11, characterized in that: In each of the battery strings, two adjacent four-cell segments have an overlapping area, and a size of the overlapping area in the first direction is 0.1 mm to 10 mm.

14. The photovoltaic module according to claim 11, characterized in that In each of the battery strings, two adjacent four-cell battery sheets have a first spacing in the first direction, and the first spacing is less than 5 mm.

15. The photovoltaic module according to claim 11, characterized in that: It also includes a plurality of long bus bars. In the first battery unit, two battery strings adjacent to each other along the second direction are connected in series through the long bus bars. In the second battery unit, two battery strings adjacent to each other along the second direction are connected in series through the long bus bars.

16. The photovoltaic module according to claim 15, characterized in that: The long bus bar is further used to connect in parallel two adjacent battery sub-strings in the battery string in the second direction.

17. The photovoltaic module according to claim 16, characterized in that: Also included is a first short bus bar and a second short bus bar; The first short bus bar is connected in parallel to two adjacent battery sub-strings in the first direction, and the second short bus bar is connected in parallel to two adjacent battery sub-strings in the first direction.

18. The photovoltaic module according to claim 17, characterized in that: The plurality of long bus bars include a first long bus bar and a second long bus bar, wherein the first long bus bar and the second long bus bar are respectively used to connect in parallel two adjacent battery strings in the first direction in the first battery unit and the second battery unit; The first short bus bar, the first long bus bar, the second long bus bar and the second short bus bar are arranged at intervals along the second direction; The first battery unit is connected in parallel with the second battery unit through the first short bus bar, the first long bus bar, the second long bus bar, and the second short bus bar.

19. The photovoltaic module according to claim 2, characterized in that: The second size of the four-divided battery sheet is 40 mm to 58 mm, and the first size of the four-divided battery sheet is 150 mm to 250 mm.

20. The photovoltaic module according to claim 3, characterized in that: The second size of the four-divided battery sheet is 80 mm to 115 mm, and the first size of the four-divided battery sheet is 80 mm to 115 mm.

21. The photovoltaic module according to claim 13, characterized in that The photovoltaic assembly further includes an insulating member, which is provided between the four-part battery sheet and the bus bar. The bus bar includes a long bus bar, a first short bus bar and a second short bus bar.

22. A photovoltaic system, characterized in that: The photovoltaic module comprises the photovoltaic module according to any one of claims 1 to 21.

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