Solar cell module
By designing alternately arranged main gate segments of different widths in solar cell modules, the high cost problem caused by excessive use of silver paste in the prior art is solved, and high-efficiency photoelectric conversion and low-cost production are achieved.
Patent Information
- Application Number
- CN202420398887.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-01
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-03-01
AI Technical Summary
In order to improve the photoelectric conversion efficiency, existing solar cells use a large amount of silver paste, resulting in a high cost of the entire solar cell.
A solar cell module is designed, and its main gate structure consists of a plurality of sequentially connected and alternately arranged first main gate segments and second main gate segments, with the widths of the first main gate segment and the second main gate segment varying in the first direction, and the shape of the main gate is optimized to reduce the amount of silver paste usage.
On the premise of ensuring effective current collection, the use of silver paste is reduced, the photoelectric conversion efficiency is improved, and the cost is reduced, which is helpful for mass production.
Smart Images
Figure CN223067450U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of solar cells, and particularly to solar cell modules. Background Art
[0002] With the development of modern industry, the global energy crisis and air pollution problems have become increasingly prominent, and traditional fuel energy is decreasing day by day. Since abundant solar radiant energy is an important renewable energy source, solar cells have become the focus of attention due to their function and advantage of converting solar radiant energy into electrical energy. However, in order to improve the photoelectric conversion efficiency, a large amount of silver paste is used in existing solar cells, resulting in a relatively high manufacturing cost for the entire solar cell. Summary of the Invention
[0003] Based on this, in view of the problem that existing solar cells use a large amount of silver paste and the manufacturing cost of the entire solar cell is relatively high, it is necessary to provide a solar cell module.
[0004] A solar cell module, characterized in that the surface of the solar cell module has at least one main grid structure, and each main grid structure includes a plurality of first main grid segments and second main grid segments that are sequentially connected and alternately arranged; the widths of the first main grid segment and the second main grid segment in a first direction are not equal; wherein, the first direction is the width direction of the main grid structure.
[0005] Since each main grid structure of the solar cell module provided in this application includes a plurality of first main grid segments and second main grid segments that are sequentially connected and alternately arranged, and the widths of the first main grid segment and the second main grid segment are not equal, the shape of the main grid is changed while retaining the main grid design, so that the average width of the main grid is smaller, and thus the amount of silver paste used on the main grid can be effectively reduced. In this way, while ensuring the effective collection of current, the solar cell module retains the characteristics of multi-main grid and non-main grid, further reduces the use of silver paste, has a relatively high photoelectric conversion efficiency and a relatively low manufacturing cost, and is conducive to mass production.
[0006] In one embodiment, the width dimension d1 of the first main grid segment in the first direction satisfies the condition: 50 μm ≤ d1 ≤ 60 μm. By setting the width dimension d1 of the first main grid segment in the first direction within the range of greater than or equal to 50 μm and less than or equal to 60 μm, the width of the first main grid segment is made more reasonable, ensuring the effective collection of current and making the photoelectric conversion efficiency of the cell module relatively high.
[0007] In one embodiment, the width dimension d2 of the second main grid segment in the first direction satisfies the condition: 30 μm ≤ d2 ≤ 40 μm. By setting the width dimension d2 of the second main grid segment in the first direction within the range of being greater than or equal to 30 μm and less than or equal to 40 μm, the width of the second main grid segment is made more reasonable. While ensuring the effective collection of current, the usage amount of silver paste is reduced, and the manufacturing cost of the entire solar cell module is relatively low.
[0008] In one embodiment, the length d of the main grid structure in the second direction satisfies the condition: 150 mm ≤ d ≤ 240 mm; wherein, the second direction is arranged at an angle to the first direction. By setting the length d of the main grid structure in the second direction within the range of being greater than or equal to 150 mm and less than or equal to 240 mm, the main grid structure can, while ensuring the effective collection of current, retain the characteristics of multi-main grid and no-main grid, further reduce the usage of silver paste, have a relatively high photoelectric conversion efficiency and a relatively low manufacturing cost.
[0009] In one embodiment, the length d3 of the first main grid segment in the second direction satisfies the condition: 5 mm ≤ d3 ≤ 24 mm; wherein, the second direction is arranged at an angle to the first direction. By setting the length d3 of the first main grid segment in the second direction within the range of being greater than or equal to 5 mm and less than or equal to 24 mm, the usage amount of silver paste is relatively reasonable while the first main grid segment can ensure the effective collection of current, and the manufacturing cost of the entire solar cell module is relatively low.
[0010] In one embodiment, the length d3 of the first main grid segment in the second direction and the length d4 of the second main grid segment in the second direction satisfy the condition: 0.5d4 ≤ d3 ≤ d4. By setting the value of the length d3 of the first main grid segment in the second direction to be greater than or equal to 0.5 times the length d4 of the second main grid segment in the second direction and less than or equal to 1 times the length d4 of the second main grid segment in the second direction, the length distribution of the first main grid segment and the second main grid segment on the main grid structure is made more reasonable. The length of the first main grid segment is less than or equal to the length of the second main grid segment. While ensuring the effective collection of current in the main grid structure, the usage amount of silver paste is less.
[0011] In one embodiment, the first main grid segment is a rectangular structure. Setting the first main grid segment as a rectangular structure facilitates the etching process of the first main grid segment.
[0012] In one embodiment, the first main grid segment is an oval structure. Setting the first main grid segment as an oval structure makes the collection of current by the first main grid segment more directional.
[0013] In one embodiment, the first main grid segment is a welding point. By designing the main grid into a connecting structure with different thicknesses, the thicker main grid can not only collect current as the main grid line but also be used as a welding point. Through this design of the main grid line, the efficiency can be improved while the cost is reduced.
[0014] In one embodiment, the first main grid segment includes a first connecting segment and a second connecting segment connected to each other; the second connecting segment is close to the side of the second main grid segment, and the second connecting segment is a tapered structure from the first main grid segment towards the second main grid segment. By setting the second connecting segment as a tapered structure, the collection of current by the first main grid segment is more directional.
[0015] In one embodiment, the second connecting segment is an arc structure or a triangular structure. By setting the second connecting segment as an arc structure or a triangular structure, the first main grid segment is easy to etch and process, and the collection of current is more directional. Description of the Drawings
[0016] Figure 1 Schematic diagram of a solar cell module provided by some embodiments of the present application.
[0017] Figure 2 Schematic diagram of the main grid structure on a solar cell module provided by some other embodiments of the present application.
[0018] Figure 3 Schematic diagram of the main grid structure on a solar cell module provided by some other embodiments of the present application.
[0019] Figure 4 Schematic diagram of the main grid structure on a solar cell module provided by some other embodiments of the present application.
[0020] Figure 5 Schematic diagram of the main grid structure on a solar cell module provided by some other embodiments of the present application.
[0021] Reference Numerals: 100 - solar cell module; 110 - main grid structure; 111 - first main grid segment; 1111 - first connecting segment; 1112 - second connecting segment; 112 - second main grid segment. Detailed Embodiments
[0022] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.
[0023] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.
[0024] In addition, if terms such as "first" and "second" appear, these terms are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0025] In the present application, unless otherwise clearly specified and limited, if terms such as "install", "connect", "join", "fix", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0026] In this application, unless otherwise clearly defined and limited, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.
[0027] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.
[0028] Global energy is gradually running out, and the development of renewable energy has become a trend. As a promising energy source, solar energy has received extensive attention from all walks of life and shown significant advantages. Using photovoltaic power generation has become an important means of utilizing solar energy. After decades of development, the field of solar cells has achieved profound development.
[0029] Currently, in order to improve efficiency, many people have carried out multi-main grid designs on solar cells. By reserving solder joints and then using them for welding, high-power solar cells have been prepared, effectively improving efficiency. However, when there are more main grids, the amount of silver paste slurry required will also increase, resulting in a relatively high manufacturing cost for the entire solar cell. Based on the above problems, this application provides a solar cell module.
[0030] Refer to Figures 1 - 5 , Figure 1 which shows a schematic diagram of a solar cell module 100 provided by some embodiments of this application. Figure 2 which shows a schematic diagram of the main grid structure 110 on the solar cell module 100 provided by some other embodiments of this application. Figure 3 which shows a schematic diagram of the main grid structure 110 on the solar cell module 100 provided by still some other embodiments of this application. Figure 4 which shows a schematic diagram of the main grid structure 110 on the solar cell module 100 provided by still some other embodiments of this application. Figure 5The figure shows a schematic diagram of the main grid structure 110 on the solar cell module 100 provided by some other embodiments of the present application. A solar cell module 100 provided by an embodiment of the present application has at least one main grid structure 110 on its surface. Each main grid structure 110 includes a plurality of first main grid segments 111 and second main grid segments 112 that are sequentially connected and alternately arranged; the widths of the first main grid segments 111 and the second main grid segments 112 are not equal in the first direction; wherein, the first direction is the width direction of the main grid structure 110. Specifically, the first direction is Figure 1 the xx' direction in
[0031] Since each main grid structure 110 of the solar cell module 100 provided by the present application includes a plurality of first main grid segments 111 and second main grid segments 112 that are sequentially connected and alternately arranged, and the widths of the first main grid segments 111 and the second main grid segments 112 are not equal, the shape of the main grid is changed while retaining the main grid design for the solar cell module 100, so that the average width of the main grid is smaller, and thus the usage amount of silver paste on the main grid can be effectively reduced. In this way, while ensuring the effective collection of current for the solar cell module 100, the characteristics of multi-main grid and no-main grid are retained, the usage of silver paste can be further reduced, the photoelectric conversion efficiency is relatively high, and the manufacturing cost is relatively low, which is conducive to mass production.
[0032] In some of the embodiments, the first main grid segment 111 is a welding point. That is to say, considering the limitations of the current industrial level, starting from the design of the main grid structure, the main grid is designed into a connecting structure with different thicknesses. The thicker main grid can not only be used as a main grid line to collect current, but also can be used as a welding point. Through this design of the main grid line, the cost can be reduced while improving the efficiency.
[0033] The following specifically describes the structure of the solar cell module 100.
[0034] In some of the embodiments, the width dimension d1 of the first main grid segment 111 in the first direction satisfies the condition: 50 μm ≤ d1 ≤ 60 μm. By setting the width dimension d1 of the first main grid segment 111 in the first direction within the range of greater than or equal to 50 μm and less than or equal to 60 μm, the width of the first main grid segment 111 is made more reasonable, ensuring the effective collection of current and making the photoelectric conversion efficiency of the cell module relatively high. In some of the embodiments, the width dimension d1 of the first main grid segment 111 in the first direction takes values such as 50 μm, 52 μm, 55 μm, 58 μm, or 60 μm, etc.
[0035] In some of these embodiments, the width dimension d2 of the second main grid segment 112 in the first direction satisfies the condition: 30 μm ≤ d2 ≤ 40 μm. By setting the width dimension d2 of the second main grid segment 112 in the first direction within the range of being greater than or equal to 30 μm and less than or equal to 40 μm, the width of the second main grid segment 112 is made more reasonable. While ensuring the effective collection of current, the usage amount of silver paste is reduced, and the manufacturing cost of the entire solar cell module is relatively low. In some of these embodiments, the value of the width dimension d2 of the second main grid segment 112 in the first direction is 30 μm, 32 μm, 35 μm, 38 μm, 40 μm, etc.
[0036] In some of these embodiments, the length d of the main grid structure 110 in the second direction satisfies the condition: 150 mm ≤ d ≤ 240 mm; wherein, the second direction is set at an angle to the first direction. Specifically, the second direction is the Figure 1 yy' direction in. By setting the length d of the main grid structure 110 in the second direction within the range of being greater than or equal to 150 mm and less than or equal to 240 mm, the main grid structure 110 can, while ensuring the effective collection of current, retain the characteristics of multi-main grid and no-main grid, and further reduce the usage of silver paste, with relatively high photoelectric conversion efficiency and low manufacturing cost. In some of these embodiments, the value of the length d of the main grid structure 110 in the second direction is 150 mm, 180 mm, 190 mm, 200 mm, 220 mm, 230 mm, or 240 mm.
[0037] In some of these embodiments, the length d3 of the first main grid segment 111 in the second direction satisfies the condition: 5 mm ≤ d3 ≤ 24 mm; wherein, the second direction is set at an angle to the first direction. By setting the length d3 of the first main grid segment 111 in the second direction within the range of being greater than or equal to 5 mm and less than or equal to 24 mm, the amount of silver paste used is relatively reasonable while ensuring the effective collection of current, and the manufacturing cost of the entire solar cell module 100 is relatively low. In some of these embodiments, the value of the length d3 of the first main grid segment 111 in the second direction is 5 mm, 10 mm, 15 mm, 20 mm, or 24 mm.
[0038] In some of these embodiments, the length d3 of the first main grid segment 111 in the second direction and the length d4 of the second main grid segment 112 in the second direction satisfy the condition: 0.5d4 ≤ d3 ≤ d4. By setting the value of the length d3 of the first main grid segment 111 in the second direction to be greater than or equal to 0.5 times the length d4 of the second main grid segment 112 in the second direction and less than or equal to 1 times the length d4 of the second main grid segment 112 in the second direction, the length distribution of the first main grid segment 111 and the second main grid segment 112 on the main grid structure 110 is more reasonable. The length of the first main grid segment 111 is less than or equal to the length of the second main grid segment 112. While ensuring the effective collection of the current of the main grid structure 110, the usage amount of the silver paste is less. In some of these embodiments, the value of the length d3 of the first main grid segment 111 in the second direction is 0.5 times d4, 0.7 times d4, 0.9 times d4 or equal to d4.
[0039] Please refer to Figure 2 , in some of these embodiments, the first main grid segment 111 is a rectangular structure. By setting the first main grid segment 111 as a rectangular structure, it is convenient for the etching process of the first main grid segment 111.
[0040] Please refer to Figure 3 , in some of these embodiments, the first main grid segment 111 is an oval structure. By setting the first main grid segment 111 as an oval structure, the first main grid segment 111 is more directional in collecting current.
[0041] Please refer to Figures 3 - 5 , in some of these embodiments, the first main grid segment 111 includes a first connection segment 1111 and a second connection segment 1112 connected to each other; the second connection segment 1112 is close to the second main grid segment 112 side, and the second connection segment 1112 is a tapered structure from the first main grid segment 111 towards the second main grid segment 112. By setting the second connection segment 1112 as a tapered structure, the first main grid segment 111 is more directional in collecting current.
[0042] In some of these embodiments, please refer to Figure 3 and Figure 4 , the second connection segment 1112 is an arc structure. Please refer to Figure 5 , the second connection segment 1112 is a triangle structure. By setting the second connection segment 1112 as an arc structure or a triangle structure, the first main grid segment 111 is easy to be etched and is more directional in collecting current.
[0043] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, 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, it should be considered as the scope described in this specification.
[0044] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.
Claims
1. A solar cell module, characterized in that, The surface of the solar cell module has at least one main grid structure (110), and each main grid structure (110) includes a plurality of first main grid segments (111) and second main grid segments (112) that are connected in sequence and arranged alternately; the widths of the first main grid segment (111) and the second main grid segment (112) in the first direction are not equal; The first main grid segment (111) includes a first connection segment (1111) and a second connection segment (1112) that are connected to each other; the second connection segment (1112) is on the side close to the second main grid segment (112), and the second connection segment (1112) is a tapered structure from the first main grid segment (111) towards the second main grid segment (112); Wherein, the first direction is the width direction of the main grid structure (110).
2. The solar cell module according to claim 1, wherein, The width dimension d1 of the first main grid segment (111) in the first direction satisfies the condition: 50μm ≤ d1 ≤ 60μm.
3. The solar cell module according to claim 1, characterized in that, The width dimension d2 of the second main grid segment (112) in the first direction satisfies the condition: 30μm ≤ d2 ≤ 40μm.
4. The solar cell module according to claim 1, characterized in that, The length d of the main grid structure (110) in the second direction satisfies the condition: 150mm ≤ d ≤ 240mm; Wherein, the second direction is set at an angle to the first direction.
5. The solar cell module according to claim 1, wherein The length d3 of the first main grid segment (111) in the second direction satisfies the condition: 5mm ≤ d3 ≤ 24mm; Wherein, the second direction is set at an angle to the first direction.
6. The solar cell module according to claim 5, characterized in that, The length d3 of the first main grid segment (111) in the second direction and the length d4 of the second main grid segment (112) in the second direction satisfy the condition: 0.5d4 ≤ d3 ≤ d4.
7. The solar cell module according to claim 1, wherein, The first main grid segment (111) is a rectangular structure or an oval structure.
8. The solar cell module according to claim 1, wherein, The first main grid segment (111) is a welding point.
9. The solar cell module according to any one of claims 1-8, characterized in that, The second connection segment (1112) is an arc structure or a triangular structure.