Solar cell module
By employing spaced conductive components and stacked busbars and insulators in solar cell modules, the alignment problem during welding of busbars and connecting conductive components is solved, improving mass production efficiency and enhancing the stability and aesthetics of the modules.
Patent Information
- Application Number
- CN202423156768.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2034-12-19
AI Technical Summary
In existing solar cell modules, holes need to be drilled in the insulating parts to avoid short circuits when welding the busbars and connecting conductive parts, resulting in high precision for automated placement and low mass production efficiency.
The first and second conductive components are arranged at intervals, and the busbar and insulating components are stacked. The insulating components are located on the side of the conductive components away from the battery cells, eliminating the need to drill holes in the insulating components for electrical connection and reducing the accuracy of automated placement.
It improves the mass production efficiency of solar cell modules, reduces the probability of warping and breakage, and enhances the aesthetics and connection strength of the modules.
Smart Images
Figure CN223829708U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of solar energy technology, and in particular to a solar cell module. Background Technology
[0002] Solar cell modules typically consist of multiple cells. The current generated by the cells is collected through connecting conductors. Multiple cells are electrically connected to each other via these conductors. To further collect current from the connecting conductors, busbars are usually placed between the cells, connecting them to the connecting conductors. Currently, the busbars in existing solar cell modules are typically located on the side of the connecting conductors furthest from the cells. This means that during production, the connecting conductors are first welded to the back of the cells, and then the busbars are placed on top and welded. To prevent short circuits caused by connecting conductors of different polarities connecting to the busbars, this connection mechanism usually requires an insulator between the connecting conductors and the cells. To ensure that connecting conductors of the same polarity can form an electrical connection with the busbars above, spaced clearance holes need to be made at corresponding positions on the insulator. This structure makes it difficult to align the busbars with the clearance holes during welding, requiring high precision in automated placement and resulting in low mass production efficiency. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a solar cell module that can avoid opening holes at corresponding positions of the insulating component, thereby reducing the accuracy of automated placement and improving mass production efficiency.
[0004] To solve the above-mentioned technical problems, this utility model provides a solar cell module, including multiple solar cells, adjacent solar cells are electrically connected by a connecting conductive member, the connecting conductive member is located on the back of the solar cell, and the connecting conductive member includes a first conductive member and a second conductive member arranged at intervals.
[0005] It also includes a busbar and an insulator located on the back of the battery cell.
[0006] Some of the busbars can be electrically connected to the first conductive element, in which case the insulating element is spaced between the second conductive element and the portion of the busbars, and the first conductive element is located on the side of the insulating element away from the battery cell.
[0007] As an improvement to the above solution, a portion of the busbars adjacent to the battery cells can be electrically connected to the second conductive element. In this case, the insulating element is separated from the first conductive element and the portion of the busbars, and the second conductive element is located on the side of the insulating element away from the battery cell.
[0008] As an improvement to the above solution, the busbar includes a first side and a second side disposed opposite to each other, and the connecting conductive element is electrically connected to the first side or the second side.
[0009] As an improvement to the above solution, the busbar and the insulating member are stacked together, the first side is located on the side of the busbar away from the battery cell, the second side is located on the side of the busbar closer to the battery cell, and the insulating member is disposed between the second side and the battery cell.
[0010] As an improvement to the above solution, when the first conductive element or the second conductive element abuts against the second side, the insulating element is disposed between the first conductive element or the second conductive element and the back of the battery cell.
[0011] As an improvement to the above solution, when the first conductive element or the second conductive element abuts against the first side, the insulating element is disposed between the second side and the back of the battery cell.
[0012] As an improvement to the above solution, the arrangement direction of the first conductive element and the second conductive element is parallel to the length direction of the busbar, and the length directions of the first conductive element and the second conductive element are perpendicular to the length direction of the busbar.
[0013] As an improvement to the above solution, the width of the insulating member is not less than the width of the busbar, and the side of the connection between the first conductive member or the second conductive member and the busbar can abut against the insulating member.
[0014] As an improvement to the above solution, multiple solder joints are provided between the connecting conductive component and the battery cell. The first conductive component and the second conductive component are connected to the battery cell through the solder joints. The busbar and the insulating component are located between two adjacent solder joints.
[0015] As an improvement to the above solution, the thickness of the manifold ranges from 85 to 220 μm.
[0016] As an improvement to the above solution, the thickness of the insulating element ranges from 50 to 600 μm.
[0017] Implementing this utility model has the following beneficial effects:
[0018] This utility model's solar cell module includes multiple solar cells, a busbar and an insulating component located on the back of each solar cell. Adjacent solar cells are electrically connected via connecting conductive components. The connecting conductive components include a first conductive component and a second conductive component spaced apart. When the busbar is electrically connected to the first conductive component, the first conductive component is located on the side of the insulating component away from the solar cell. When the busbar is electrically connected to the second conductive component, the second conductive component is located on the side of the insulating component away from the solar cell. Therefore, it is not necessary to drill holes at corresponding positions on the insulating component to form an electrical connection between the connecting conductive component and the busbar, which can reduce the precision required for automated placement and thus improve mass production efficiency. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of the solar cell module of this utility model;
[0020] Figure 2 This is a partial cross-sectional structural diagram of the present invention when the conductive component and the busbar are isolated;
[0021] Figure 3 This is a partial cross-sectional structural diagram of the first embodiment of the present invention when connecting the conductive component and the busbar;
[0022] Figure 4 This is a partial cross-sectional structural diagram of the second embodiment of the present invention when connecting the conductive component and the busbar. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.
[0024] See Figure 1 This utility model discloses a solar cell module, including multiple solar cells 1. Adjacent solar cells 1 are electrically connected by a connecting conductive member 2. The connecting conductive member 2 is located on the back of the solar cell 1 and is used to collect the current on the back of the solar cell 1. The current between adjacent solar cells 1 is collected on the connecting conductive member 2. The connecting conductive member 2 includes a first conductive member 21 and a second conductive member 22 arranged at intervals. The first conductive member 21 and the second conductive member 22 correspond to different polarities. The first conductive member 21 and the second conductive member 22 in the same solar cell 1 are isolated from each other to avoid short circuits.
[0025] The solar cell module further includes a busbar 3 and an insulator 4 disposed on the back side of the solar cell 1. The busbar 3 is used to collect the current from the connecting conductors 2 of different solar cells 1, and the insulator 4 is used to isolate the busbar 3 from the back side of the solar cell 1 to prevent short circuits. Some of the busbars 3 can be electrically connected to the first conductor 21, that is, the first conductor 21 and the busbar 3 form a circuit of the same polarity. In this case, the insulator 4 is separated from the second conductor 22 and this part of the busbar 3, that is, the second conductor 22 is isolated from the busbars 3 of different polarities by the insulator 4. In this case, the first conductor 21 is disposed on the side of the insulator 4 away from the solar cell 1, and the busbar 3 and the first conductor 21 are connected to the side of the insulator 4 away from the solar cell. Part of the busbar 3 can be electrically connected to the second conductive element 22, and the second conductive element 22 and the busbar 3 form an electrical circuit of another polarity. At this time, the insulating element 4 is separated between the first conductive element 21 and this part of the busbar 3. The first conductive element 21 and the busbar 3 of different polarities are isolated by the insulating element 4. The second conductive element 22 is located on the side of the insulating element 4 away from the battery cell 1, and the busbar 3 and the second conductive element 22 are connected to the side of the insulating element 4 away from the power cell.
[0026] The beneficial effects of this utility model embodiment are as follows:
[0027] This utility model embodiment of the solar cell module includes multiple solar cells 1, a busbar 3 and an insulating member 4 disposed on the back of the solar cells 1. Adjacent solar cells 1 are electrically connected by a connecting conductive member 2. The connecting conductive member 2 includes a first conductive member 21 and a second conductive member 22 disposed at intervals. When the busbar 3 is electrically connected to the first conductive member 21, the first conductive member 21 is disposed on the side of the insulating member 4 away from the solar cells 1. When the busbar 3 is electrically connected to the second conductive member 22, the second conductive member 22 is disposed on the side of the insulating member 4 away from the solar cells 1. Therefore, it is not necessary to open holes at corresponding positions on the insulating member 4 to form an electrical connection between the connecting conductive member 2 and the busbar 3, which can reduce the precision of automated placement and thus improve mass production efficiency.
[0028] Furthermore, in traditional modules, the busbar 3 and the insulator 4 are located at the edge of the battery cell 1 or at the interval between adjacent battery cells 1. Because the connection between the busbar 3 and the insulator 4 and the battery cell 1 is weak, the entire module is prone to warping after welding, and the probability of breakage or microcracks after lamination is increased. In this embodiment of the present invention, the busbar 3 and the insulator 4 are both located on the back of the battery cell 1, which not only shields the busbar 3 and the insulator 4 and improves the overall aesthetics of the module, but also reduces the warping of the module after the busbar 3 and the battery cell 1 are welded.
[0029] The arrangement direction of the first conductive element 21 and the second conductive element 22 is parallel to the length direction of the busbar 3, and multiple first conductive elements 21 and second conductive elements 22 can be arranged at intervals along the length direction of the busbar 3. The length direction of the first conductive element 21 and the second conductive element 22 is perpendicular to the length direction of the busbar 3. Parts of the first conductive element 21 and the second conductive element 22 abut against the busbar 3, and the remaining parts abut against the back of the battery cell 1.
[0030] See Figure 2 The busbar 3 includes a first side 31 and a second side 32 disposed opposite to each other. The connecting conductive member 2 is electrically connected to either the first side 31 or the second side 32, and can contact the busbar 3 from different sides to achieve electrical connection. Specifically, the busbar 3 and the insulating member 4 are stacked. During production, the busbar 3 and the insulating member 4 can be pre-connected to form an assembly, and then the assembly formed by the busbar 3 and the insulating member 4 can be placed on the back of the battery cell 1. This reduces the steps and time of stacking. In other embodiments, the insulating member 4 can be placed on the back of the battery cell 1 first, and then the busbar 3 can be placed on the insulating member 4. The first side 31 is located on the side of the busbar 3 away from the battery cell 1, and the second side 32 is located on the side of the busbar 3 closer to the battery cell 1. The insulating member 4 is disposed between the second side 32 and the battery cell 1 to achieve isolation.
[0031] See Figure 3In the first embodiment, when the first conductive element 21 or the second conductive element 22 abuts against the second side surface 32, the insulating element 4 is disposed between the first conductive element 21 or the second conductive element 22 and the back surface of the battery cell 1. At this time, the first conductive element 21 or the second conductive element 22 is located on the side of the busbar 3 near the back surface of the battery cell 1, and the insulating element 4 is disposed on the side of the first conductive element 21 or the second conductive element 22 near the battery cell 1. When the first conductive element 21 or the second conductive element 22 forms an electrical connection with the second side surface 32 of the busbar 3, the insulating element 4 forms an insulating barrier between the first conductive element 21 or the second conductive element 22 and the back surface of the battery cell 1. During production, the insulating component 4 and the busbar 3 need to be separated. For example, the first conductive component 21 is first placed on the back of the battery cell 1, and then the insulating component 4 is placed in a direction perpendicular to the first conductive component 21. Then, the second conductive component 22 is placed on the back of the battery cell 1. At this time, part of the second conductive component 22 will be isolated from the battery cell 1 through the insulating component 4. Then, the busbar 3 is placed above the second conductive component 22 in a direction perpendicular to the second conductive component 22, so that the busbar 3 can contact the second conductive component 22 to form an electrical connection. The busbar 3 and the first conductive component 21 are isolated by the insulating component 4.
[0032] See Figure 4 In the second embodiment, when the first conductive element 21 or the second conductive element 22 abuts against the first side surface 31, the insulating element 4 is disposed between the second side surface 32 and the back surface of the battery cell 1. At this time, the insulating element 4 simultaneously isolates the busbar 3 and the first conductive element 21 or the second conductive element 22 from the back surface of the battery cell 1. During production, the busbar 3 and the insulating element 4 can be pre-connected to form an assembly. For example, the first conductive element 21 is first placed on the back surface of the battery cell 1, and then the assembly formed by the pre-connection of the busbar 3 and the insulating element 4 is placed on the first conductive element 21. The busbar 3 and the first conductive element 21 are isolated by the insulating element 4. Then, the second conductive element 22 is placed on the first side surface 31 so that the second conductive element 22 contacts the busbar 3 to form an electrical connection.
[0033] In both the first and second embodiments, it is not necessary to make holes in the insulating component 4, which can reduce the accuracy of automated placement and thus improve mass production efficiency.
[0034] The width of the insulating member 4 is not less than the width of the busbar 3 to ensure that the busbar 3 can be isolated. The side of the connection between the first conductive member 21 or the second conductive member 22 and the busbar 3 can abut against the insulating member 4. In this way, the conductive member connected to the busbar 3 can maintain a certain distance from the back of the battery cell 1, thereby achieving a better current collection effect.
[0035] In addition, multiple solder joints 5 are provided between the connecting conductive element 2 and the battery cell 1. The first conductive element 21 and the second conductive element 22 are connected to the battery cell 1 through the solder joints 5, which are both mechanically and electrically connected to the battery cell 1. The solder joints 5 can serve as electrical circuit nodes for the first conductive element 21 and the second conductive element 22. The generated current can be collected by the solder joints 5. Traditional modules place the busbar 3 and insulator 4 on the edge of the battery cell 1 or at intervals between adjacent battery cells 1. This not only occupies more space in the module but also causes warping after welding due to insufficient fixing points and low support strength. In this embodiment, the busbar 3 and insulator 4 are located on the back of the battery cell 1, and the positions of the insulator 4 and busbar 3 are staggered from the solder joints 5, specifically between two adjacent solder joints 5. This not only saves space occupied by the busbar 3 and insulator 4 but also provides strong connection strength because they are fixed to the back of the battery cell 1, making it less prone to warping after welding. Furthermore, since the insulator 4 and busbar 3 both have a certain height, staggering their positions from the solder joints 5 avoids the solder joints 5 from being poorly welded due to the height of the insulator 4 and busbar 3.
[0036] In this embodiment, the thickness of the busbar 3 ranges from 85 to 220 μm, and the thickness of the insulating component 4 ranges from 50 to 600 μm. When the busbar 3 is less than 85 μm, the overall strength is insufficient, failing to provide strong support and connection, and the cross-sectional area is small, resulting in poor busbar merging performance. When the busbar 3 is greater than 220 μm, it increases material costs and component weight, and the high protrusion height can easily affect welding. When the thickness of the insulating component 4 is less than 50 μm, the insulation performance and weather resistance are poor. When the thickness of the insulating component 4 is greater than 600 μm, the excessive height will affect welding.
[0037] The above are preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.
Claims
1. A solar cell module, characterized in that, The device includes a plurality of battery cells distributed along a first direction and a second direction. Adjacent battery cells in the first direction are electrically connected by a connecting conductive element, which is located on the back side of the battery cell. The connecting conductive element includes a first conductive element and a second conductive element that are spaced apart. It also includes a busbar and an insulator disposed on the back of the battery cell; Some of the busbars can be electrically connected to the first conductive element, in which case the insulating element is spaced between the second conductive element and the portion of the busbars, and the first conductive element is located on the side of the insulating element away from the battery cell.
2. The solar cell module according to claim 1, characterized in that, In the second direction, a portion of the busbars adjacent to the battery cells can be electrically connected to the second conductive element. At this time, the insulating element is separated from the first conductive element and the portion of the busbars, and the second conductive element is disposed on the side of the insulating element away from the battery cell.
3. The solar cell module according to claim 1, characterized in that, The busbar includes a first side and a second side disposed opposite to each other, and the connecting conductive element is electrically connected to the first side or the second side.
4. The solar cell module according to claim 3, characterized in that, The busbar and the insulating member are stacked together. The first side is located on the side of the busbar away from the battery cell, and the second side is located on the side of the busbar closer to the battery cell. The insulating member is disposed between the second side and the battery cell.
5. The solar cell module according to claim 4, characterized in that, When the first conductive element or the second conductive element abuts against the second side, the insulating element is disposed between the first conductive element or the second conductive element and the back of the battery cell.
6. The solar cell module according to claim 4, characterized in that, When the first conductive element or the second conductive element abuts against the first side, the insulating element is disposed between the second side and the back of the battery cell.
7. The solar cell module according to claim 1, characterized in that, The arrangement direction of the first conductive element and the second conductive element is parallel to the length direction of the busbar, and the length directions of the first conductive element and the second conductive element are perpendicular to the length direction of the busbar.
8. The solar cell module according to claim 1, characterized in that, The width of the insulating member is not less than the width of the busbar, and the side of the connection between the first conductive member or the second conductive member and the busbar can abut against the insulating member.
9. The solar cell module according to claim 1, characterized in that, Multiple solder joints are provided between the connecting conductive component and the battery cell. The first conductive component and the second conductive component are connected to the battery cell through the solder joints. The busbar and the insulating component are disposed between two adjacent solder joints.
10. The solar cell module according to claim 1, characterized in that, The thickness of the manifold ranges from 85 to 220 μm.
11. The solar cell module according to claim 1, characterized in that, The thickness of the insulating component ranges from 50 to 600 μm.