Solar cell and solar cell module
By setting intersecting non-grid areas on the solar cell, multiple cutting methods can be achieved, solving the problem of the single cutting method of solar cell, improving the space utilization and module power of solar cell modules, ensuring uniform current collection and reducing resistance loss.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHU GCL INTEGRATED NEW ENERGY TECH CO LTD
- Filing Date
- 2025-07-14
- Publication Date
- 2026-06-26
AI Technical Summary
The current technology uses a single method for cutting solar cells, which makes it impossible to arrange them flexibly on solar cell modules, affecting space utilization and module power.
Intersecting first and second non-grid regions are set on the solar cell, dividing it into first and second grid regions of different specifications, allowing cell segments of different specifications to be flexibly arranged on the module.
By employing various segmentation methods, the space utilization and module power of solar cell modules are improved, current collection uniformity is ensured, and internal resistance loss is reduced.
Smart Images
Figure CN224419177U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of solar energy technology, and more specifically, to a solar cell and a solar cell module. Background Technology
[0002] To reduce internal resistance loss in solar cells and increase the power of solar cell modules, the entire cell is usually cut into 2, 3, or 6 equal parts, and then the solar cells are arranged and assembled on the solar cell module. However, in related technologies, the cutting method for solar cells is limited and not convenient for flexible arrangement on the solar cell module. Utility Model Content
[0003] The purpose of this disclosure is to provide a solar cell and a solar cell module, wherein the solar cell can be divided in a variety of ways.
[0004] To achieve the above objectives, this disclosure provides a solar cell having a grid line region, a first non-grid line region extending along a first direction, and a second non-grid line region extending along a second direction. The grid line region is divided into at least two first grid line regions by the first non-grid line region, and the grid line region is divided into at least two second grid line regions by the second non-grid line region, wherein the first direction and the second direction intersect.
[0005] Optionally, the gate line region is divided into a plurality of gate line units by the first non-gate line region and the second non-gate line region. Each gate line unit includes at least two first main gates extending along a first direction and at least two second main gates extending along a second direction, wherein the first main gates are connected to the second main gates.
[0006] Optionally, the solar cell has two first sides opposite each other along a first direction and two second sides opposite each other along a second direction. In each grid cell, the distance between the first main grid closest to the second side or the first non-grid area and the second side or the first non-grid area is half the distance between two adjacent first main grids, and the distance between the second main grid closest to the first side or the second non-grid area and the first side or the second non-grid area is half the distance between two adjacent second main grids.
[0007] Optionally, the solar cell is provided with a plurality of pads, which are located at the intersection of the first main grid and the second main grid.
[0008] Optionally, the grid line region has multiple fine grids, each of which is connected to the first main grid or the second main grid.
[0009] Optionally, the solar cell has at least two first non-grid regions extending along a first direction, and / or the solar cell has at least two second non-grid regions extending along a second direction.
[0010] Optionally, the first non-grid region and / or the second non-grid region divide the solar cell into multiple cell segments.
[0011] Optionally, the gate line region has a first distance between itself and the first side, a second distance between itself and the second side, a third distance between adjacent first gate line regions, and a fourth distance between adjacent second gate line regions. The first distance is equal to the second distance, and the first distance or the second distance is equal to half of the third distance or the second distance.
[0012] Optionally, the solar cell has two first sides opposite each other along a first direction and two second sides opposite each other along a second direction, the distance between the two first sides is 180mm-184mm, and the distance between the two second sides is 208mm-212mm.
[0013] According to a second aspect of this disclosure, a solar cell module is provided, comprising a plurality of first and / or second solar cells arranged in an array, wherein the first and second solar cells respectively have a first grid line region and a second grid line region as described above.
[0014] Optionally, the first and second solar cells may have different specifications.
[0015] Through the above technical solution, by setting intersecting first and second non-grid regions on the solar cell, the first non-grid region can divide the grid region into at least two first grid regions, with adjacent first grid regions arranged along a second direction. Similarly, the second non-grid region can divide the grid region into at least two second grid regions, with adjacent second grid regions arranged along a first direction. Thus, by using the first and second non-grid regions, the grid region can be divided into first and second grid regions of different specifications. This allows the solar cell to be sliced along either the first or second non-grid region, resulting in cell segments with different specifications. Since solar cell modules are typically of a limited size, by setting mutually perpendicular first and second non-grid regions on the solar cell, the solar cell can be sliced into cell segments of different specifications. These cell segments of different specifications can then be arranged in the solar cell module, thereby improving the space utilization of the solar cell module and increasing the module power.
[0016] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description
[0017] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:
[0018] Figure 1 This is a schematic diagram of a solar cell structure provided according to an embodiment of the present disclosure;
[0019] Figure 2 yes Figure 1 Enlarged view of point A;
[0020] Figure 3 This is a schematic diagram of the structure of a solar cell according to an embodiment of the present disclosure, wherein a first non-grid region and a second non-grid region are shown;
[0021] Figure 4 This is a schematic diagram of the structure of a gate cell according to an embodiment of the present disclosure, wherein a fine gate, a first main gate, and a second main gate are shown.
[0022] Figure 5 This is a schematic diagram of the structure of a gate cell according to an embodiment of the present disclosure, wherein a first main gate and a second main gate are shown;
[0023] Figure 6 This is a schematic diagram of the structure of a gate cell provided according to an embodiment of the present disclosure, wherein a fine gate is shown.
[0024] Explanation of reference numerals in the attached figures
[0025] 1-Solar cell, 11-First side, 12-Second side, 2-First non-grid area, 3-Second non-grid area, 4-First main grid, 5-Second main grid, 6-Fine grid, 7-Pad, 10-Grid line unit, D1-First distance, D2-Second distance, D3-Third distance, D4-Fourth distance, L1-First direction, L2-Second direction. Detailed Implementation
[0026] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.
[0027] In this disclosure, unless otherwise stated, the terms "first," "second," etc., are used to distinguish different components and do not imply sequentiality or importance. Furthermore, in the following description, when referring to the accompanying drawings, the same reference numerals in different drawings denote the same elements. Those skilled in the art should understand that the above definitions are for explanation and illustration only and should not be construed as limiting the scope of this disclosure.
[0028] According to a specific embodiment of this disclosure, refer to Figures 1 to 5 As shown, a solar cell 1 is provided. The solar cell 1 has a grid line region, a first non-grid line region 2 extending along a first direction, and a second non-grid line region 3 extending along a second direction. The grid line region is divided into a plurality of first grid line regions by the first non-grid line region 2; the grid line region is divided into a plurality of second grid line regions by the second non-grid line region 3, and the first direction and the second direction are perpendicular to each other.
[0029] Through the above technical solution, by setting intersecting first non-grid region 2 and second non-grid region 3 on the solar cell 1, the first non-grid region 2 can divide the grid region into at least two first grid regions, with adjacent first grid regions arranged along a second direction. The second non-grid region 3 can divide the grid region into at least two second grid regions, with adjacent second grid regions arranged along a first direction. Thus, the grid region can be divided into first grid regions and second grid regions of different specifications by the first non-grid region 2 and the second non-grid region 3, so that when the solar cell is cut along the first non-grid region 2 or the second non-grid region 3, the specifications of the cell segments with the first grid regions and the second grid regions are different. Therefore, since solar cell modules are usually of a limited size, by setting mutually perpendicular first non-grid region 2 and second non-grid region 3 on the solar cell 1, the solar cell 1 can be cut into cell segments of different specifications, so that the cell segments of different specifications can be arranged in the solar cell module, thereby improving the space utilization of the solar cell module and increasing the module power of the solar cell module.
[0030] Preferably, in the embodiments of this disclosure, the first direction and the second direction can be set perpendicularly, which is beneficial to simplify the manufacturing process and optimize the current transmission path on the gate line region. This disclosure does not impose specific limitations on this.
[0031] In some embodiments of this disclosure, reference is made to Figures 1 to 5As shown, the grid region is divided into multiple grid units 10 by a first non-grid region 2 and a second non-grid region 3. Each grid unit 10 includes at least two first main grids 4 extending along a first direction and at least two second main grids 5 extending along a second direction, with the first main grids 4 and the second main grids 5 connected together. Thus, the grid region can be divided into at least four grid units 10. At least two grid units 10 arranged along the first direction can form a first grid region, and at least two grid units 10 arranged along the second direction can form a second grid region. By providing at least two first main grids 4 and at least two second main grids 5 in each grid unit 10, since the first main grids 4 and the second main grids 5 are perpendicular to each other, regardless of whether the solar cell is slicing along the first non-grid region 2 or the second non-grid region 3, each first grid region or second grid region can have mutually perpendicular first main grids 4 and second main grids 5. Therefore, when arranging battery segments of different specifications cut from solar cell 1 on a solar cell module, the battery segments can be directly connected through the first main grid 4 or the second main grid 5 without adjusting the orientation of the battery segments. Thus, after slicing the solar cell 1 through the first non-grid area 2 or the second non-grid area 3, the arrangement of the first main grid 4 and the second main grid 5 can meet the series or parallel connection requirements when flexibly arranging battery segments of different specifications on the solar cell module.
[0032] In some embodiments of this disclosure, reference is made to Figures 1 to 3 As shown, the solar cell 1 has two first sides 11 opposite each other along a first direction and two second sides 12 opposite each other along a second direction. In each grid cell 10, the distance between the first main grid 4 closest to the second side 12 or the first non-grid area 2 and the second side 12 or the first non-grid area 2 is half the distance between two adjacent first main grids 4. Similarly, the distance between the second main grid 5 closest to the first side 11 or the second non-grid area 3 and the first side 11 or the second non-grid area 3 is half the distance between two adjacent second main grids 5. This ensures that the area of current that can be collected in each first main grid 4 or second main grid 5 in the first or second direction is consistent, guaranteeing a consistent collection effect of photogenerated carriers. This allows for balanced and efficient collection and transmission of photogenerated carriers generated on the surface of the solar cell 1, avoiding uneven current collection that leads to energy loss, and reducing the risk of localized overheating of the solar cell 1 due to excessively large or small local currents, which accelerates aging and damage.
[0033] When the solar cell 1 is exposed to light, it can generate a large number of photogenerated carriers. The first main grid 4 and the second main grid 5 can transmit the collected photogenerated carriers to the external circuit to realize the conversion and output of solar energy and electrical energy.
[0034] In some embodiments of this disclosure, reference is made to Figure 1 and Figure 2 , Figure 4 and Figure 5 As shown, the solar cell 1 has multiple pads 7, which are located at the intersection of the first main grid 4 and the second main grid 5. In this way, photogenerated carriers collected by the first main grid 4 and the second main grid 5 can first converge to the pads 7. Since the pads 7 are used for soldering with solder ribbon, the current can be transferred to adjacent solar cells or external circuits via the solder ribbon. Therefore, by placing the pads 7 at the current convergence point of the first main grid 4 and the second main grid 5, current in both directions can be collected simultaneously, thereby shortening the current transmission path and reducing internal resistance loss.
[0035] When multiple cell segments are arranged in a solar cell module, the cell segments need to be connected in series or in parallel to form a circuit. This is achieved by welding the positive electrode (such as the back field electrode) of one cell segment to the negative electrode (such as the first main grid 4 or the second main grid 5 on the front side) with solder ribbons to form a current path.
[0036] In some embodiments of this disclosure, reference is made to Figure 1 and Figure 2 , Figure 4 and Figure 6 As shown, the grid area has multiple fine grids 6, each fine grid 6 connected to either the first main grid 4 or the second main grid 5. The fine grids 6 collect photogenerated carriers generated on the surface of the solar cell 1 and converge them to the main grid. By connecting the fine grids 6 to either the first main grid 4 or the second main grid 5, the collected current is concentrated in one of the two main grids, reducing current detours and confusion during transmission, thereby reducing resistance loss. This also prevents uneven current distribution between the first main grid 4 and the second main grid 5, which could lead to excessively large or small local currents and cause localized overheating of the solar cell 1.
[0037] In some embodiments of this disclosure, multiple fine gates 6 extend along a first direction or a second direction. Thus, the fine gates 6 extending along the first direction can connect with the second main gate 5, or the fine gates 6 extending along the second direction can connect with the first main gate 4, so that photogenerated carriers collected by the fine gates 6 can converge to the first main gate 4 or the second main gate 5. In other embodiments, the fine gates 6 may also be arranged at an angle to the first main gate 4 and the second main gate 5, and connect with both the first main gate 4 and the second main gate 5; however, no specific limitation is made in this regard.
[0038] In some embodiments of this disclosure, reference is made to Figures 1 to 3As shown, the solar cell 1 has at least two first non-grid regions 2 extending along a first direction, each first non-grid region 2 having a first grid region on both sides along a second direction, and / or, the solar cell 1 has at least two second non-grid regions 3 extending along the second direction, each second non-grid region 3 having a second grid region on both sides along the first direction. Thus, when the solar cell 1 is cut along at least two first non-grid regions 2, at least three cell segments with first grid regions can be cut; or, when the solar cell 1 is cut along at least two second non-grid regions 3, at least three cell segments with second grid regions can be cut. In the embodiments provided in this disclosure, the solar cell 1 may have three first non-grid regions 2 and three second non-grid regions 3, which can divide the grid region into nine grid units 10. This allows for selective slicing of the solar cell 1 into two, three, or four pieces along one or more of the first non-grid regions 2 or the second non-grid regions 3. Alternatively, the solar cell 1 can be sliced into sixteen pieces along the three first non-grid regions 2 and the second non-grid regions 3. Therefore, by setting the three first non-grid regions 2 and the three second non-grid regions 3, the solar cell 1 can be sliced into 2-16 cell pieces. Thus, by setting the first non-grid regions 2 and the second non-grid regions 3, flexible slicing of the solar cell 1 can be achieved, allowing for flexible arrangement of cell pieces of different specifications on the solar cell module, improving the space utilization of the solar module, and adapting to solar cell modules of different specifications.
[0039] In other embodiments, depending on the size of the solar cell 1 and the actual arrangement requirements, four or more first non-grid regions 2 and second non-grid regions 3 may be provided on the solar cell 1. This disclosure does not impose specific limitations on this.
[0040] In some embodiments of this disclosure, reference is made to Figures 1 to 3 , Figure 4 As shown, the centerline of the first non-grid region 2 and / or the first non-grid region 2 divides the solar cell 1 into multiple cell segments. Thus, when the solar cell 1 is cut along the first non-grid region 2, the width of each cell segment is equal in the first direction; when the solar cell segments are cut along the second non-grid region 3, the width of each cell segment is equal in the second direction. This achieves equal division of the solar cell 1, ensuring the dimensional consistency of the multiple cell segments.
[0041] In some embodiments of this disclosure, reference is made to Figure 2As shown, the grid line region has a first distance D1 between itself and the first side 11, a second distance D2 between itself and the second side 12, a third distance D3 between adjacent first grid line regions, and a fourth distance D4 between adjacent second grid line regions. The first distance D1 is equal to the second distance D2, and either the first distance D1 or the second distance D2 is equal to half of either the third distance D3 or the second distance D2. Since the first distance D1 is equal to half of the third distance D3, and the second distance D2 is equal to half of the fourth distance D4, the distance between the first grid line region or the second grid line region and the side of the battery segment is equal in each segment, regardless of whether the segment is cut along the first non-grid line region 2 or the second non-grid line region 3. This ensures that each segment is standardized and that the size of each segment is consistent when the solar cell 1 is equally divided. Therefore, the battery segments cut through the first non-grid line region 2 or the second non-grid line region 3 have consistent dimensions, which is beneficial for welding and layout on the solar cell module.
[0042] In some embodiments of this disclosure, reference is made to Figure 1 and Figure 3As shown, the solar cell 1 has two first sides 11 opposite each other along a first direction and two second sides 12 opposite each other along a second direction. The distance between the two first sides 11 is 180mm-184mm, and the distance between the two second sides 12 is 208mm-212mm. The width of the solar cell 1, i.e., the distance between the two first sides 11, can be 182mm, and the length of the solar cell 1, i.e., the distance between the two second sides 12, can be 210mm. Thus, when the solar cell 1 is divided along the first non-grid region 2, and the distance between the first non-grid region 2 and the two opposite second sides 12 is equal, the length of the cell segment is 182mm and the width is 105mm. When the solar cell 1 has three first non-grid regions 2 extending along the first direction, and the distance between the first non-grid region 2 and the second side 12 is equal to the distance between two adjacent second non-grid regions 3, when the solar cell 1 is divided along the three second non-grid regions 3, the length of the cell segment is 182mm and the width is 52.5mm. When the solar cell 1 is sliced along the second non-grid region 3, and the distance between the second non-grid region 3 and the two opposite first sides 11 is equal, it can be sliced into cell segments with a length of 210 mm and a width of 91 mm. When the solar cell 1 has three second non-grid regions 3 extending along the second direction, and the distance between the second non-grid region 3 and the first side 11 is equal to the distance between two adjacent second non-grid regions 3, the cell segment is sliced along the second grid region, and the length of the cell segment is 210 mm and the width is 45.5 mm. Thus, when the solar cell 1 has three first non-grid regions 2 and three second non-grid regions 3, it can be sliced into cell segments of at least 210 mm × 91 mm, 210 mm × 45.5 mm, 182 mm × 105 mm, and 182 mm × 52.5 mm, so that they can be flexibly arranged on the solar cell module.
[0043] Here, the 210×182mm level solar cell 1 does not strictly limit the length and width of the solar cell 1 to 210mm and 182mm, but allows them to fluctuate around this benchmark.
[0044] According to a second aspect of this disclosure, a solar cell module is provided, comprising a plurality of first and / or second solar cells arranged in an array, wherein the first and second solar cells respectively have a first grid line region and a second grid line region as described above. This allows the first solar cells cut along a first non-grid line region 2 to be arranged in the solar cell module, or the second solar cells cut along a second non-grid line region 3 to be arranged in the solar cell module, or both the first and second solar cells to be arranged in the solar cell module.
[0045] In some embodiments of this disclosure, the first and second solar cells have different specifications. This allows for improved space utilization of the solar cell module by arranging first and second solar cells of different specifications. For example, a typical solar cell module packaging production line is 2500×1400mm in size. When multiple 210mm×91mm second solar cells are arranged in a 26x6 row layout, 140mm of space remains across the module's width, insufficient to accommodate the 210mm length of the cell segments. In this case, 182mm×105mm first solar cells can be arranged along the edges, with the 105mm width parallel to the width of the solar cell module. Since each cell segment has a first main grid 4 and a second main grid 5, the 210mm×91mm and 182mm×105mm cells can be connected in series or parallel. Therefore, when 182×210mm solar cells 1 need to be arranged in the solar cell module, they can be divided into segments of different specifications, thus fully utilizing the space of the solar cell module.
[0046] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.
[0047] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.
[0048] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.
Claims
1. A solar cell, characterized in that, The solar cell has a grid line region, a first non-grid line region extending along a first direction, and a second non-grid line region extending along a second direction. The grid line region is divided into at least two first grid line regions by the first non-grid line region; the grid line region is divided into at least two second grid line regions by the second non-grid line region, and the first direction and the second direction intersect.
2. The solar cell according to claim 1, characterized in that, The gate line region is divided into multiple gate line units by the first non-gate line region and the second non-gate line region. Each gate line unit includes at least two first main gates extending along a first direction and at least two second main gates extending along a second direction. The first main gates are connected to the second main gates.
3. The solar cell according to claim 2, characterized in that, The solar cell has two first sides opposite each other along a first direction and two second sides opposite each other along a second direction. In each grid cell, the distance between the first main grid closest to the second side or the first non-grid area and the second side or the first non-grid area is half the distance between two adjacent first main grids. The distance between the second main grid closest to the first side or the second non-grid area and the first side or the second non-grid area is half the distance between two adjacent second main grids.
4. The solar cell according to claim 2, characterized in that, The solar cell has multiple pads, which are located at the intersection of the first main grid and the second main grid.
5. The solar cell according to claim 2, characterized in that, The grid area has multiple fine grids, each of which is connected to the first main grid or the second main grid.
6. The solar cell according to claim 1, characterized in that, The solar cell has at least two first non-grid regions extending along a first direction, and / or the solar cell has at least two second non-grid regions extending along a second direction.
7. The solar cell according to claim 1, characterized in that, The first non-grid region and / or the second non-grid region divide the solar cell into multiple cell segments.
8. The solar cell according to claim 3, characterized in that, The grid line region has a first distance between itself and the first side, a second distance between itself and the second side, a third distance between adjacent first grid line regions, and a fourth distance between adjacent second grid line regions. The first distance is equal to the second distance, and the first distance or the second distance is equal to half of the third distance or the second distance.
9. The solar cell according to claim 1, characterized in that, The solar cell has two first sides opposite each other along a first direction and two second sides opposite each other along a second direction. The distance between the two first sides is 180mm-184mm, and the distance between the two second sides is 208mm-212mm.
10. A solar cell module, characterized in that, It includes a plurality of first and / or second solar cells arranged in an array, wherein the first and second solar cells respectively have the first grid line region and the second grid line region of any one of claims 1-9.
11. The solar cell module according to claim 10, characterized in that, The first and second battery cells have different specifications.