Imbricated tile assembly for solar cells
By setting inclined sections and limit structures in the stacking assembly of the solar cell, the misalignment and thickness problems during stacking of the cell are solved, and the flatness of the component and the reliability of the packaging are achieved.
Patent Information
- Application Number
- CN202420653553.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-03-29
AI Technical Summary
In the production of stacked tiles of solar cells, the battery cells are prone to misalignment during stacking, which affects the series effect of the battery cells. The stacking position is thicker, which can easily lead to damage to the battery cells during the packaging process.
A stacked tiling assembly for solar cells is designed. By setting inclined sections on the top and bottom of the cell, and installing limiting protrusions and limiting plates on the cut surfaces, the adjacent cell is glued and bonded with conductive adhesive to prevent misalignment, and the thickness of the stacking position is reduced by the inclined section.
It effectively prevents misalignment and series reduction between the battery cells, improves the flatness of the stacked tiles, avoids damage to the battery cells during packaging, and ensures the normal use of the battery cells.
Smart Images
Figure CN222827590U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of solar cells, in particular to a shingle assembly for solar cells. Background Art
[0002] In the production of solar cells, shingling technology is increasingly being used. Shingling technology is different from traditional module packaging. It refers to cutting traditional cells into small pieces, directly connecting two cells with conductive glue, and then stacking and pasting them together, and then connecting the cells in series. Traditional modules generally retain a cell spacing of about 2-3 mm, while the shingling process achieves zero spacing between cells by overlapping small cells, thereby improving module packaging efficiency.
[0003] In order to protect the aesthetics of solar cells and improve power generation efficiency, the cells in the solar cell need to be arranged neatly. However, when stacking the cells, it is easy for the cells to be misplaced, which will affect the series connection effect of the cells. Utility Model Content
[0004] The purpose of the utility model is to solve the above-mentioned shortcomings in the prior art and to propose a shingled assembly for solar cells.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a shingled assembly for solar cells is designed, comprising a plurality of cells, an inclined first section is arranged on one side of the top of the cell, a limiting protrusion is installed on the top of the first section, the limiting protrusion is arranged along the length direction of the first section, and limiting plates are installed at the ends of the first section;
[0006] An inclined second section is provided on the bottom of the cell away from the first section, the second section corresponds to the first section, and in two adjacent cell slices, the second section of the preceding cell slice is bonded to the first section of the following cell slice by conductive adhesive.
[0007] Preferably, the cell comprises an upper electrode, an anti-reflection film, an N-type semiconductor, a P-type semiconductor, a reflective layer, and a lower electrode;
[0008] The upper electrode is arranged at the first section, that is, the limiting plate is installed on the end of the upper electrode, and the limiting protrusion is installed on the top of the upper electrode, and the upper electrode is installed on the anti-reflection film, the bottom of the anti-reflection film is installed on the top of the N-type semiconductor, and the N-type semiconductor is installed on the P-type semiconductor, a reflective layer is installed at the bottom of the P-type semiconductor, and the lower electrode is installed on the bottom of the reflective layer, and the lower electrode extends to the second section.
[0009] Preferably, a plurality of grooves arranged at intervals are provided on the top surface of the cell, that is, the grooves are provided on the anti-reflection film, the grooves are conical grooves, and the front view projection of the grooves is a polygon.
[0010] Preferably, a plurality of first limiting grooves arranged at intervals are formed on the first section surface, and a plurality of second limiting grooves arranged at intervals are formed on the second section surface.
[0011] Preferably, the limiting plate is an insulating plate, and a gap is left between the upper electrode and the lower electrode on the same battery cell.
[0012] Preferably, the height of the limiting protrusion is smaller than the thickness of the battery cell.
[0013] The design scheme proposed by the utility model has the following beneficial effects during application:
[0014] 1. When two cells are stacked, the limit plate limits the ends of the cells to prevent the two cells from moving out of place, thereby ensuring the bonding effect of the conductive adhesive and preventing the two cells from being connected in series.
[0015] 2. The shingled assembly for solar cells uses an inclined section to reduce the thickness of the stacking position of two adjacent cells when they are stacked, thereby improving the flatness of the upper and lower surfaces of the shingled assembly and preventing the stacking position of the two cells from being squeezed when the back plate and cover plate are used for packaging, thereby preventing the cell from being damaged and affecting the normal use of the cell. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the top structure of the utility model;
[0017] Figure 2 This is a schematic diagram of the bottom structure of the utility model;
[0018] Figure 3 It is a side cross-sectional view of the utility model;
[0019] Figure 4 It is the overall structure diagram of the utility model.
[0020] In the figure: 1. battery cell; 2. first cut surface; 3. second cut surface; 4. limiting protrusion; 5. limiting plate; 6. first limiting groove; 7. second limiting groove; 8. upper electrode; 9. anti-reflection film; 10. groove; 11. N-type semiconductor; 12. P-type semiconductor; 13. reflective layer; 14. lower electrode. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0022] Reference Figure 1-Figure 4 , a shingled assembly for solar cells, comprising a plurality of cells 1, each of which comprises an upper electrode 8, an anti-reflection film 9, an N-type semiconductor 11, a P-type semiconductor 12, a reflective layer 13, and a lower electrode 14;
[0023] like Figure 4 As shown, the upper electrode 8 is mounted on the anti-reflection film 9, the bottom of the anti-reflection film 9 is mounted on the top of the N-type semiconductor 11, and the N-type semiconductor 11 is mounted on the P-type semiconductor 12, a reflective layer 13 is mounted on the bottom of the P-type semiconductor 12, and the lower electrode 14 is mounted on the bottom of the reflective layer 13. When sunlight irradiates the solar cell (i.e., the anti-reflection film 9), the PN junction inside the semiconductor material absorbs photons and generates electron-hole pairs; these electrons and holes are separated under the action of the electric field and move to the N-type semiconductor 11 and the P-type semiconductor 12 respectively to form a current.
[0024] In order to improve the light trapping rate on the anti-reflection film 9, Figure 1 and Figure 3 As shown, a plurality of grooves 10 arranged at intervals are provided on the top surface of the cell 1, that is, the grooves 10 are provided on the anti-reflection film 9, the grooves 10 are conical grooves, and the front projection of the grooves 10 is a polygon, which increases the overall area of the anti-reflection film 9 and changes the reflection angle during illumination, thereby reducing the reflectivity of sunlight on the cell 1 and further enhancing the light transmission ability, making it easier for light to reach the N-type semiconductor 11 and the P-type semiconductor 12.
[0025] like Figure 1 and Figure 3 As shown, an inclined first section 2 is provided on one side of the top of the battery cell 1, wherein the upper electrode 8 is provided on the first section 2, a limiting protrusion 4 is installed on the top of the first section 2 (that is, the limiting protrusion 4 is installed on the top of the upper electrode 8), the limiting protrusion 4 is arranged along the length direction of the first section 2, and limiting plates 5 are installed at the ends of the first section 2 (that is, the limiting plates 5 are installed on the ends of the upper electrode 8);
[0026] like Figure 2 and Figure 3 As shown, an inclined second section 3 is provided on the side of the bottom of the battery cell 1 away from the first section 2, and the lower electrode 14 is provided on the second section 3, the second section 3 corresponds to the first section 2, and in two adjacent battery cells 1, the second section 3 of the previous battery cell 1 is bonded to the first section 2 of the next battery cell 1 by conductive adhesive.
[0027] Specifically, when installing the battery cells 1, multiple battery cells 1 are first arranged in a straight line in sequence, and then the second cut surface 3 of the previous battery cell 1 is affixed to the first cut surface 2 of the next battery cell 1, and conductive glue is applied between the two cut surfaces, so that the two battery cells 1 can be bonded together through the hot melting of the conductive glue under the action of hot pressing, and due to the action of the limiting plate 5 at the end of the first cut surface 2, the possibility of misalignment and displacement when the two battery cells 1 are connected is avoided.
[0028] Furthermore, when the conductive adhesive is hot-melted, in order to improve the gripping strength of the two cut surfaces on the conductive adhesive, Figure 1 and Figure 2 As shown, a plurality of first limiting grooves 6 arranged at intervals are provided on the first section 2, and a plurality of second limiting grooves 7 arranged at intervals are provided on the second section 3, so as to reduce the probability of the conductive adhesive flowing out from between the two sections during hot melting, thereby ensuring good adhesion between the two battery cells 1.
[0029] It needs to be further explained that if Figure 1 and Figure 3 As shown, the height of the limiting protrusion 4 is smaller than the thickness of the battery cell 1, so that the limiting protrusion 4 can further limit the stacking area while preventing the protrusion from being too thick to affect the subsequent hot pressing and packaging. In addition, the inclined section can reduce the thickness of the stacking position of two adjacent battery cells 1 when they are stacked, thereby improving the flatness of the upper and lower surfaces of the shingled assembly, preventing the battery cell 1 from being damaged due to excessive squeezing caused by additional protrusions in a certain area when the back plate and cover plate are used for packaging, and when the two battery cells 1 are connected by hot pressing, the EVA film is not sufficiently adhered during packaging, leaving bubbles inside the solar panel, thereby affecting the penetration and reflection of sunlight.
[0030] In actual use, solar cells are composed of multiple groups of shingled components. Therefore, busbars are installed at the bottom and sides of the cell 1 to serve as carriers for series connection between the shingled components, and to lead out the positive and negative poles of the solar cell and connect them to the junction box.
[0031] It should be noted that the limit plate 5 is an insulating plate, which prevents the limit plate 5 from conducting the current generated on the battery cell 1 and causing energy loss, thereby reducing the power conversion efficiency of the battery cell 1. A gap is left between the upper electrode 8 and the lower electrode 14 on the same battery cell 1 to prevent the positive and negative poles on the same battery cell 1 from being connected, thereby forming a closed loop, causing the battery cell 1 to be unable to be used normally.
[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A shingled assembly for a solar cell, characterized in that: It comprises a plurality of battery cells (1), an inclined first section (2) is arranged on one side of the top of the battery cell (1), a limiting protrusion (4) is installed on the top of the first section (2), the limiting protrusion (4) is arranged along the length direction of the first section (2), and a limiting plate (5) is installed at each end of the first section (2); An inclined second cut surface (3) is provided on a side of the bottom of the battery cell (1) away from the first cut surface (2), the second cut surface (3) corresponds to the first cut surface (2), and in two adjacent battery cells (1), the second cut surface (3) of the preceding battery cell (1) is connected to the first cut surface (2) of the succeeding battery cell (1) by means of conductive adhesive.
2. The shingled assembly for solar cells according to claim 1, characterized in that: The battery cell (1) comprises an upper electrode (8), an anti-reflection film (9), an N-type semiconductor (11), a P-type semiconductor (12), a reflective layer (13), and a lower electrode (14); The upper electrode (8) is arranged at the first section (2), that is, the limiting plate (5) is installed on the end of the upper electrode (8), and the limiting protrusion (4) is installed on the top of the upper electrode (8), and the upper electrode (8) is installed on the anti-reflection film (9), the bottom of the anti-reflection film (9) is installed on the top of the N-type semiconductor (11), and the N-type semiconductor (11) is installed on the P-type semiconductor (12), and a reflective layer (13) is installed at the bottom of the P-type semiconductor (12), and the lower electrode (14) is installed on the bottom of the reflective layer (13), and the lower electrode (14) extends to the second section (3).
3. The shingled assembly for solar cells according to claim 2, characterized in that: A plurality of grooves (10) arranged at intervals are provided on the top surface of the battery sheet (1), that is, the grooves (10) are provided on the anti-reflection film (9), the grooves (10) are conical grooves, and the front projection of the grooves (10) is a polygon.
4. The shingled assembly for solar cells according to claim 2, characterized in that: A plurality of first limiting grooves (6) arranged at intervals are provided on the first section (2), and a plurality of second limiting grooves (7) arranged at intervals are provided on the second section (3).
5. The shingled assembly for solar cells according to claim 2, characterized in that: The limiting plate (5) is an insulating plate, and a gap is left between the upper electrode (8) and the lower electrode (14) on the same battery cell (1).
6. The shingled assembly for solar cells according to claim 2, characterized in that: The height of the limiting protrusion (4) is less than the thickness of the battery cell (1).