Solar cell and photovoltaic module
By using alternating electrode groups and staggered spacing design, the electrode structure of solar cells is optimized, solving the problems of high material consumption and large shading area of traditional grid line electrodes, and achieving lower cost and higher efficiency in power conversion.
Patent Information
- Application Number
- CN202422030857.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-08-21
AI Technical Summary
Traditional solar cell grid electrode design requires a large amount of conductive silver paste, resulting in high material costs, low power generation efficiency, and a large shading area.
The design employs alternating first and second electrode groups with staggered intervals in the intersecting direction, thereby reducing the amount of bus electrode material and the light-shielding area.
It reduces material costs and improves power generation efficiency by optimizing the electrode structure to achieve more efficient carrier collection and extraction.
Smart Images
Figure CN223463269U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaics, in particular to a solar cell and a photovoltaic component. Background Art
[0002] A solar cell is a device that can convert solar energy into electrical energy and is currently one of the main devices used by humans to directly collect solar energy.
[0003] Solar cells typically include a gate electrode for collecting photogenerated carriers. Traditionally, gate electrodes are silver electrodes, made by printing and sintering conductive silver paste. To improve carrier collection, the gate electrodes are typically designed in a dense, linear pattern. However, this design not only consumes a large amount of conductive silver paste but also presents a large light-shielding area. Ultimately, traditional gate electrode designs result in higher material costs and lower power generation efficiency for solar cells. Utility Model Content
[0004] Based on this, in order to solve the above technical problems, it is necessary to provide a solar cell to reduce the material required for the busbar electrode and reduce the shading area of the busbar electrode, thereby reducing material costs and power generation efficiency.
[0005] According to some embodiments of the present disclosure, a solar cell is provided, comprising a cell substrate and a plurality of first electrode groups, a plurality of second electrode groups, a first welding point group and a second welding point group disposed on the cell substrate;
[0006] The first electrode group includes a plurality of first bus electrodes extending along a first direction and spaced apart, the second electrode group includes a plurality of second bus electrodes extending along the first direction and spaced apart, and the plurality of first electrode groups and the plurality of second electrode groups are spaced apart in a second direction intersecting the first direction;
[0007] The first welding point group includes a plurality of first welding points spaced apart along the second direction, the plurality of first welding points in the first welding point group are used to be welded to a first welding bar and make the first welding bar intersect with the first bus electrode, and the plurality of second welding points in the second welding point group are used to be welded to a second welding bar and make the second welding bar intersect with the second bus electrode.
[0008] In some embodiments of the present disclosure, there is a first interval between adjacent first bus electrodes in the first electrode group, there is a second interval between adjacent second bus electrodes in the second electrode group, and the first interval and the second interval are staggered in the second direction;
[0009] The first welding points in the first solder point group are respectively arranged in the second intervals distributed along the second direction, and the second welding points in the second solder point group are respectively arranged in the first intervals distributed along the second direction.
[0010] In some embodiments of the present disclosure, the first electrode groups and the second electrode groups are alternately arranged along the second direction, the first intervals in the first electrode groups correspond to and are respectively aligned with each other, and the second intervals in the second electrode groups correspond to and are respectively aligned with each other.
[0011] In some embodiments of the present disclosure, the second welding points are arranged in the first intervals, and the first welding points are arranged in the second intervals.
[0012] In some embodiments of the present disclosure, the length of the first bus electrode is 2 mm to 50 mm; and / or,
[0013] The length of the second bus electrode is 2 mm to 50 mm.
[0014] In some embodiments of the present disclosure, the line width of the first bus electrode is 5 μm to 100 μm; and / or,
[0015] The line width of the second bus electrode is 5 μm to 100 μm.
[0016] In some embodiments of the present disclosure, the interval between the adjacent first bus electrodes along the first direction is 2 mm to 50 mm; and / or,
[0017] The interval between the adjacent second bus electrodes along the first direction is 2 mm to 50 mm; and / or,
[0018] In the first electrode groups and the second electrode groups, the interval between two electrode groups adjacent along the second direction is 100 μm to 5000 μm.
[0019] In some embodiments of the present disclosure, the width of the first welding point is 5 μm to 500 μm, and the interval between the adjacent first welding points is 1 mm to 200 mm; and / or,
[0020] The width of the second welding point is 5 μm to 500 μm, and the interval between the adjacent second welding points is 1 mm to 200 mm.
[0021] In some embodiments of the present disclosure, a frame electrode is further included, and the frame electrode is arranged around the first electrode groups, the second electrode groups, the first solder point groups, and the second solder point groups.
[0022] In a second aspect, the present disclosure also provides a photovoltaic module, comprising a first soldering strip, a second soldering strip, and a solar cell according to any one of the above embodiments, the first soldering strip being soldered to a plurality of the first soldering points in the first soldering point group and being electrically connected to a plurality of the first bus electrodes distributed in the second direction, and the second soldering strip being soldered to a plurality of the second soldering points in the second soldering point group and being electrically connected to a plurality of the second bus electrodes distributed in the second direction.
[0023] The solar cell of the present disclosure comprises a plurality of first electrode groups and a plurality of second electrode groups, and is provided with a first soldering point group and a second soldering point group correspondingly. A plurality of first soldering points in the first soldering point group are used for soldering to the first soldering strip and making the first soldering strip intersect with the first bus electrode, and a plurality of second soldering points in the second soldering point group are used for soldering to the second soldering strip and making the second soldering strip intersect with the second bus electrode. This design can ensure that the first bus electrode and the second bus electrode collect the carriers generated in the cell substrate as fully as possible and conduct them to the external circuit. Moreover, compared with the long strip-shaped and uninterrupted grid electrode in the prior art, the first interval and the second interval are respectively designed in the first electrode group and the second electrode group, which can obviously reduce the material required by the bus electrode and reduce the light-shielding area of the electrode as a whole, thereby reducing the material cost and the power generation efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 It is a schematic top view of a solar cell;
[0025] Figure 2 It is a schematic top view of a solar cell on which the first soldering strip and the second soldering strip are arranged in Figure 1 .
[0026] In the drawings, reference numerals and their meanings are as follows:
[0027] 100, cell substrate; 110, first bus electrode; 120, second bus electrode; 130, first soldering point; 140, second soldering point; 150, frame electrode; 210, first soldering strip; 220, second soldering strip. DETAILED DESCRIPTION
[0028] In order to facilitate the understanding of the present utility model, the present utility model will be described more comprehensively in combination with the embodiments and effect diagrams. The embodiments give the preferred embodiments of the present utility model. However, the present utility model can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present utility model more thorough and comprehensive.
[0029] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly fixed to the other element or can be fixed to the other element by an intermediate element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intermediate element between the two elements. In addition, in the description of the present application, unless specifically defined and limited, the terms "mounting", "connection", and "linking" should be understood in a broad sense, for example, they can be fixed connection, can be detachable connection, or can be integrated connection. For example, it can be mechanical connection, or can be electrical connection. For example, it can be direct connection, or can be indirect connection through an intermediate element, or can be internal communication of two elements. It should be understood that those skilled in the art can understand the specific meanings of the above terms according to specific circumstances, and no ambiguity will be caused.
[0030] Unless otherwise defined, in the description of the present application, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and other terms indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings of the present application, which are only for the purpose of facilitating and simplifying the description of the content of the present application, and helping the reader to understand in conjunction with the drawings, and are not to limit or imply that the device or element must have a specific orientation, therefore, it cannot be understood as a limitation of the present application.
[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the implementation of the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items. "Multiple" in this article includes a combination of two or more items.
[0032] In a first aspect, the present disclosure provides a solar cell, comprising a cell substrate, and a plurality of first electrode groups, a plurality of second electrode groups, a first solder point group and a second solder point group disposed on the cell substrate.
[0033] Figure 1 is a top view structural schematic diagram of a solar cell. Referring to Figure 1As shown, the first electrode group includes a plurality of first bus electrodes 110 extending along a first direction and arranged at intervals, and a first interval is provided between adjacent first bus electrodes 110, the second electrode group includes a plurality of second bus electrodes 120 extending along the first direction and arranged at intervals, and a second interval is provided between adjacent second bus electrodes 120, and the plurality of first electrode groups and the plurality of second electrode groups are arranged at intervals in a second direction intersecting the first direction, and the first interval and the second interval are arranged at intervals in the second direction.
[0034] With reference to Figure 1 As shown, the first solder point group includes a plurality of first solder points 130 arranged at intervals along the second direction, and the plurality of first solder points 130 in the first solder point group are used for soldering to the first solder strip 210 and making the first solder strip 210 intersect the first bus electrode 110, and the plurality of second solder points 140 in the second solder point group are used for soldering to the second solder strip and making the second solder strip intersect the second bus electrode 120.
[0035] For ease of illustration, with reference to Figure 1 As shown, the first direction can be the x direction in Figure 1 , and the plurality of first bus electrodes 110 and the plurality of second bus electrodes 120 are arranged side by side along the first direction. The second direction can be the y direction in Figure 1 , and the plurality of first solder points 130 and the plurality of second solder points 140 are arranged side by side along the second direction. As some examples of this embodiment, the first direction and the second direction can be perpendicular to each other. But it can be understood that in other examples, the first direction and the second direction can also be obliquely intersected.
[0036] In the structure shown in Figure 1 , different styles are used in the figure to respectively indicate the first bus electrode 110 and the second bus electrode 120 for ease of distinction, in which the solid line represents the first bus electrode 110 and the dashed line represents the second bus electrode 120. But it can be understood that the actual shape and structure of the first bus electrode 110 and the second bus electrode 120 can be the same. Figure 1 Different styles are also used in to respectively indicate the first solder point 130 and the second solder point 140, in which the square represents the first solder point 130 and the circle represents the second solder point 140. But it can be understood that the actual shape and structure of the first solder point 130 and the second solder point 140 can be the same. In addition, it can be understood that the first solder point 130 and the second solder point 140 refer to components capable of soldering, which can have regular or irregular shapes and actually occupy a certain area.
[0037] It can be understood that the first welding points 130 are used for welding with the first welding strips 210, and the plurality of first welding points 130 in the first welding point group are arranged along the second direction, and correspondingly, the first welding strips 210 also extend along the second direction. The plurality of second welding points 140 in the second welding point group are arranged along the second direction, and correspondingly, the second welding strips 220 also extend along the second direction. Thus, the normal output of the current in the plurality of first bus electrodes 110 is realized. Similarly, through the design of the second welding point group, the normal output of the current in the plurality of second bus electrodes 120 is realized.
[0038] Referring to Figure 1 As some examples of this embodiment, as shown in the figure, there is a first interval between adjacent first bus electrodes 110, there is a second interval between adjacent second bus electrodes 120, and the first interval and the second interval are arranged staggered in the second direction. The plurality of first welding points 130 in the first welding point group are arranged in the plurality of second intervals distributed along the second direction respectively, and the plurality of second welding points 140 in the second welding point group are arranged in the plurality of first intervals distributed along the second direction respectively. Correspondingly, the first welding points 130 in the first interval and the second welding points 140 in the second interval are also arranged staggered in the second direction. It can be understood that the first welding strips 210 and the second welding strips 220 to be prepared subsequently are also arranged staggered.
[0039] In this example, the structure design uses the first interval and the second interval as the arrangement areas of the second welding points 140 and the first welding points 130 respectively, which can make the distribution of the welding points and the bus electrodes more dense and regular, and is beneficial to improve the distribution density of the welding points.
[0040] Referring to Figure 1 As some examples of this embodiment, as shown in the figure, the plurality of first electrode groups and the plurality of second electrode groups are arranged alternately in the second direction, the plurality of first intervals in the plurality of first electrode groups correspond one by one and are aligned respectively, and the plurality of second intervals in the plurality of second electrode groups correspond one by one and are aligned respectively. The plurality of first electrode groups and the plurality of second electrode groups can be arranged alternately in sequence. Through the above design, the electrical contact between the first welding strips 210 and the second welding strips 220 arranged subsequently and the first bus electrodes 110 and the second bus electrodes 120 is more uniform, and the ability to output current is optimized.
[0041] Referring to Figure 1As shown, as some examples of this embodiment, the second welding points 140 are arranged in each first interval, and the first welding points 130 are arranged in each second interval. In this example, the second welding points 140 and the first welding points 130 are arranged in each first interval and each second interval respectively, so that the distribution of the welding points is more dense, which not only helps to improve the current collecting ability around the welding points, thereby improving the filling factor, but also helps to improve the welding tension of the first welding strip 210 and the second welding strip 220 subsequently arranged.
[0042] In other examples, part of the first intervals can also not be provided with the second welding points 140, i.e., this part of the first intervals is vacant, and part of the second intervals can also be vacant, which can reduce the material cost. For example, in some examples, there can be one or more vacant second intervals between two adjacent first welding points 130, and there can be one or more vacant first intervals between two adjacent second welding points 140. Further, the number of vacant second intervals between each adjacent two first welding points 130 can be constant, and the number of vacant first intervals between each adjacent two second welding points 140 can be constant, so that the first welding points 130 and the second welding points 140 are more evenly distributed.
[0043] As some examples of this embodiment, the length of the first bus electrode 110 is 2mm-50mm. For example, the length of the first bus electrode 110 can be 2mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 50mm, or the length of the first bus electrode 110 can also be between any two of the above lengths.
[0044] As some examples of this embodiment, the length of the second bus electrode 120 is 2mm-50mm. For example, the length of the second bus electrode 120 can be 2mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 50mm, or the length of the second bus electrode 120 can also be between any two of the above lengths.
[0045] In this embodiment, the length of the first bus electrode 110 and the second bus electrode 120 can be the same.
[0046] In this embodiment, the length of the first bus electrode 110 and / or the second bus electrode 120 is set to 2mm-50mm, which helps to ensure that the carrier transport path is relatively short, thereby improving the efficiency.
[0047] In this embodiment, since the length of a single first bus electrode 110 and / or a single second bus electrode 120 is relatively short, the requirement for the printing screen is reduced, and the printed electrode is less likely to have a breakpoint, so that the bus electrode can be printed thinner.
[0048] As some examples of this embodiment, the line width of the first bus electrode 110 is 5 μm to 100 μm. For example, the line width of the first bus electrode 110 can be 5 μm, 10 μm, 20 μm, 30 μm, 50 μm, 70 μm, 80 μm, 100 μm, or the line width of the first bus electrode 110 can also be within a range between any two of the above widths. With the first bus electrode 110 having such a line width, it is beneficial to further reduce material consumption and lower material cost.
[0049] As some examples of this embodiment, the line width of the second bus electrode 120 is 5 μm to 100 μm. For example, the line width of the second bus electrode 120 can be 5 μm, 10 μm, 20 μm, 30 μm, 50 μm, 70 μm, 80 μm, 100 μm, or the line width of the second bus electrode 120 can also be within a range between any two of the above widths. With the second bus electrode 120 having such a line width, it is beneficial to further reduce material consumption and lower material cost.
[0050] As some examples of this embodiment, the spacing between two adjacent first bus electrodes 110 in the first direction is 2 mm to 50 mm. For example, the spacing between two first bus electrodes 110 can be 2 mm, 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 50 mm, or the spacing between two first bus electrodes 110 can also be within a range between any two of the above distances. It can be understood that the spacing can also be understood as the length of the first interval.
[0051] As some examples of this embodiment, the spacing between two adjacent second bus electrodes 120 in the first direction is 2 mm to 50 mm. For example, the spacing between two second bus electrodes 120 can be 2 mm, 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 50 mm, or the spacing between two second bus electrodes 120 can also be within a range between any two of the above distances. It can be understood that the spacing can also be understood as the length of the second interval.
[0052] As some examples of this embodiment, the spacing between two adjacent electrode groups in the second direction is 100 μm to 5000 μm in the plurality of groups of first electrode groups and the plurality of groups of second electrode groups. It can be understood that in this embodiment, since the first electrode groups and the second electrode groups are arranged alternately, the two adjacent electrode groups are the first electrode group and the second electrode group, and the spacing therebetween is 100 μm to 5000 μm. In other embodiments, the first electrode group can also be adjacent to another first electrode group, at which time the two electrode groups are the two first electrode groups, and the spacing therebetween is 100 μm to 5000 μm.
[0053] Further, the spacing between two electrode groups adjacent in the second direction can be 100 pm, 200 pm, 500 pm, 1000 pm, 2000 pm, 3000 pm, 4000 pm, 5000 pm, or the spacing can be between any two distances mentioned above.
[0054] In this embodiment, the spacing between two first bus electrodes 110 adjacent in the first direction is equal to the spacing between two second bus electrodes 120 adjacent in the first direction. By setting the spacing as mentioned above, it is beneficial to reduce material consumption while ensuring sufficient conduction of charge carriers, thereby reducing material cost.
[0055] As some examples of this embodiment, the width of the first soldering point 130 is 5 pm to 500 pm. Wherein, the width of the first soldering point 130 refers to the maximum width on the edge of the first soldering point 130, for example, when the first soldering point 130 is circular, the width thereof is the diameter length of the circle, when the first soldering point 130 is square, the width thereof is the diagonal length of the square. Further, in this example, the width of the first soldering point 130 can be 5 pm, 10 pm, 50 pm, 100 pm, 200 pm, 300 pm, 400 pm, 500 pm, or the width of the first soldering point 130 can also be within the range between any two widths mentioned above.
[0056] As some examples of this embodiment, the spacing between adjacent first soldering points 130 is 1 mm to 200 mm. Wherein, the adjacent first soldering points 130 include the first soldering points 130 adjacent in the first direction and the first soldering points 130 adjacent in the second direction. In this example, the spacing between adjacent first soldering points 130 is 1 mm, 5 mm, 10 mm, 20 mm, 50 mm, 80 mm, 100 mm, 150 mm, 200 mm, or the spacing between adjacent first soldering points 130 can also be between any two distances mentioned above.
[0057] As some examples of this embodiment, the width of the second soldering point 140 is 5 pm to 500 pm. Further, in this example, the width of the second soldering point 140 can be 5 pm, 10 pm, 50 pm, 100 pm, 200 pm, 300 pm, 400 pm, 500 pm, or the width of the second soldering point 140 can also be within the range between any two widths mentioned above.
[0058] As some examples of this embodiment, the spacing between adjacent second soldering points 140 is 1mm-200mm. Among them, the adjacent second soldering points 140 include the second soldering points 140 adjacent in the first direction and the second soldering points 140 adjacent in the second direction. In this example, the spacing between adjacent second soldering points 140 is 1mm, 5mm, 10mm, 20mm, 50mm, 80mm, 100mm, 150mm, 200mm, or the spacing between adjacent second soldering points 140 can also be between any two of the above distances.
[0059] Referring to Figure 1 As some examples of this embodiment, the solar cell further includes a frame electrode 150, and the frame electrode 150 is arranged around the first electrode group, the second electrode group, the first solder point group and the second solder point group.
[0060] In this example, part of the first bus electrode 110 and / or the second bus electrode 120 can be electrically connected to the frame electrode 150. For example, in the first electrode group and the second electrode group, the first bus electrode 110 located at the outermost side and / or the second bus electrode 120 located at the outermost side can be electrically connected to the frame electrode 150.
[0061] As some examples of this embodiment, the spacing between the frame electrode 150 and the edge of the cell substrate 100 can be 10μm-2000μm.
[0062] In this embodiment, the cell substrate 100 can be designed according to the known structure of the solar cell. As some examples of this embodiment, the cell substrate 100 can include a crystalline silicon substrate and a passivated contact structure stacked on the crystalline silicon substrate, and the passivated contact structure can include a tunneling layer and a doped silicon layer stacked in sequence in a direction away from the crystalline silicon substrate.
[0063] The solar cell in this embodiment includes multiple first electrode groups and multiple second electrode groups, and is correspondingly provided with a first solder point group and a second solder point group. The multiple first soldering points 130 in the first solder point group are used for soldering to the first soldering strip 210 and making the first soldering strip 210 intersect with the first bus electrode 110, and the multiple second soldering points 140 in the second soldering point group are used for soldering to the second soldering strip 220 and making the second soldering strip 220 intersect with the second bus electrode 120. This design can ensure that the first bus electrode 110 and the second bus electrode 120 collect the carriers generated in the cell substrate 100 as much as possible and conduct them to the external circuit. Moreover, compared with the long strip-shaped and uninterrupted grid line electrode in the prior art, the first interval and the second interval are respectively designed in the first electrode group and the second electrode group, which can significantly reduce the material required for the bus electrode and reduce the light-shielding area of the electrode as a whole, thereby reducing the material cost and the power generation efficiency.
[0064] In a second aspect, the present disclosure further provides a photovoltaic assembly, which includes a first welding rod 210, a second welding rod 220, and a solar cell as described in the above embodiment. Figure 2 The first welding rod 210 and the second welding rod 220 are arranged at Figure 1 Schematic diagram of the top view structure of the solar cell.
[0065] Reference Figure 2 As shown, the first welding bar 210 is welded to the plurality of first welding points 130 in the first welding point group and electrically connected to the plurality of first bus electrodes 110 distributed in the second direction. The second welding bar 220 is welded to the plurality of second welding points 140 in the second welding point group and electrically connected to the plurality of second bus electrodes 120 distributed in the second direction. The first welding bar 210 and the second welding bar 220 can be arranged in parallel and spaced apart.
[0066] As some examples of this embodiment, the first welding rod 210 and the second welding rod 220 may be metal welding rods capable of welding. For example, the first welding rod 210 and the second welding rod 220 may be selected from tin welding rods, or may be selected from at least one of silver welding rods, silver-clad copper welding rods, silver-clad aluminum welding rods, and silver-clad iron welding rods.
[0067] Reference Figure 2 As shown, as some examples of this embodiment, the first welding strip 210 and the second welding strip 220 are both electrically connected to the frame electrode 150 .
[0068] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0069] The above embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, and these variations and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.
Claims
1. A solar cell, characterized by, The battery substrate (100) and a plurality of first electrode groups, a plurality of second electrode groups, a first solder point group and a second solder point group arranged on the battery substrate (100) are included. The first electrode group includes a plurality of first bus electrodes (110) extending in a first direction and arranged at intervals, and the second electrode group includes a plurality of second bus electrodes (120) extending in the first direction and arranged at intervals. The first solder point group includes a plurality of first solder points (130) arranged at intervals in the second direction, and the plurality of first solder points (130) in the first solder point group are used to be soldered to a first solder strip (210) and make the first solder strip (210) intersect with the first bus electrode (110), and the plurality of second solder points (140) in the second solder point group are used to be soldered to a second solder strip (220) and make the second solder strip (220) intersect with the second bus electrode (120).
2. The solar cell according to claim 1, characterized in that, The first interval between adjacent first bus electrodes (110) in the first electrode group and the second interval between adjacent second bus electrodes (120) in the second electrode group are arranged at intervals in the second direction. The plurality of first solder points (130) in the first solder point group are respectively arranged in a plurality of second intervals distributed along the second direction, and the plurality of second solder points (140) in the second solder point group are respectively arranged in a plurality of first intervals distributed along the second direction.
3. The solar cell according to claim 2, characterized in that, The plurality of first electrode groups and the plurality of second electrode groups are arranged alternately in the second direction, and the plurality of first intervals in the plurality of first electrode groups correspond one by one and are aligned respectively, and the plurality of second intervals in the plurality of second electrode groups correspond one by one and are aligned respectively.
4. The solar cell according to claim 3, characterized in that, The second solder points (140) are arranged in each of the first intervals, and the first solder points (130) are arranged in each of the second intervals.
5. The solar cell according to any one of claims 1 to 4, wherein The length of the first bus electrode (110) is 2mm-50mm; and / or, The length of the second bus electrode (120) is 2mm-50mm.
6. The solar cell according to claim 5, characterized in that, The line width of the first bus electrode (110) is 5μm-100μm; and / or, The line width of the second bus electrode (120) is 5μm-100μm.
7. The solar cell according to any one of claims 1 to 4 and 6, wherein The spacing between adjacent first bus electrodes (110) in the first direction is 2mm-50mm; and / or, The spacing between adjacent second bus electrodes (120) in the first direction is 2mm-50mm; and / or, In the plurality of first electrode groups and the plurality of second electrode groups, the spacing between two electrode groups adjacent in the second direction is 100μm-5000μm.
8. The solar cell according to any one of claims 1 to 4 and 6, characterized by The width of the first solder point (130) is 5μm-500μm, and the spacing between adjacent first solder points (130) is 1mm-200mm; and / or, The width of the second soldering points (140) is 5 μm-500 μm, and the interval between adjacent second soldering points (140) is 1 mm-200 mm.
9. The solar cell according to any one of claims 1 to 4 and 6, characterized by A frame electrode (150) is further included, which is arranged around the first electrode group, the second electrode group, the first soldering point group and the second soldering point group.
10. A photovoltaic module, characterized by, A first soldering strip (210) is soldered to the plurality of first soldering points (130) in the first soldering point group and is electrically connected to the plurality of first bus electrodes (110) distributed in the second direction, and a second soldering strip (220) is soldered to the plurality of second soldering points (140) in the second soldering point group and is electrically connected to the plurality of second bus electrodes (120) distributed in the second direction.