Photovoltaic solder strip, battery string and photovoltaic module
By designing a black coating and groove structure on the photovoltaic solder ribbon, combined with a connecting layer and an inclined solder ribbon section, the problems of unstable connection between the solder ribbon and the solar cell and light pollution were solved, achieving a stable connection between the solder ribbon and the solar cell and an aesthetically pleasing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2026-03-31
AI Technical Summary
The light pollution caused by traditional silver solder ribbons and the instability of the connection between the solder ribbon and the battery cells affect the aesthetics and integrity of the battery string.
A black coating is used to cover the connection surface of the photovoltaic ribbon, and multiple grooves are formed on the connection surface. The combination of the connection layer and the raised structure enhances the adhesion and stability between the black coating and the substrate. An inclined ribbon section is designed to prevent the edge of the cell from cracking.
It improves the color consistency between the solder ribbon and the battery cell, enhances the anti-glare effect, improves the connection strength and stability between the solder ribbon and the battery cell, reduces the possibility of solder ribbon detachment, and enhances the overall integrity and aesthetics of the battery string.
Smart Images
Figure CN224069042U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of solar cell technology, and in particular to a photovoltaic ribbon, a cell string, and a photovoltaic module. Background Technology
[0002] The battery string is used to convert solar energy into electrical energy. The battery string contains multiple photovoltaic cells. Adjacent photovoltaic cells are connected in series by solder strips, which are joined to the main grid of the battery to collect and transmit current.
[0003] All-black solar cell strings are gaining increasing attention due to their aesthetically pleasing design and ability to integrate with architecture. This type of string achieves a uniform black appearance through special coatings or design techniques, which not only enhances the visual appeal of the solar power system but also allows it to blend better into modern architectural designs. In traditional solar cell strings, the cells are typically connected using silver solder strips, which have high reflectivity and can cause light pollution. Summary of the Invention
[0004] This disclosure provides a photovoltaic ribbon and a battery string to at least solve the above-mentioned technical problems existing in the prior art.
[0005] The first aspect of this disclosure provides a photovoltaic bonding strip, comprising:
[0006] A substrate, the substrate including a connecting surface disposed on the front and / or back of the substrate, the connecting surface having a plurality of first grooves;
[0007] A black coating is applied to the connecting surface and covers the plurality of first grooves.
[0008] Furthermore, the first groove extends along the width direction Y of the substrate, and a plurality of the first grooves are sequentially arranged along the length direction X of the substrate.
[0009] Furthermore, it also includes a connecting layer, which is disposed between the connecting surface and the black coating, and the connecting layer is connected to both the connecting surface and the black coating.
[0010] The connecting layer has multiple protrusions, the shape of which is adapted to the shape of the first groove, and the protrusions cooperate with the first groove.
[0011] Furthermore, the black coating includes an outer surface away from the substrate, on which a frosted layer is formed.
[0012] Furthermore, the black coating includes an outer surface away from the substrate, the outer surface having a plurality of triangular structures formed thereon.
[0013] Furthermore, the longitudinal section of the first groove is triangular, trapezoidal, rectangular, or square.
[0014] Furthermore, the thickness δ of the black coating satisfies: 5μm≤δ≤30μm;
[0015] And / or, the black coating includes an outer surface, the roughness Ra of which satisfies: 15μm≤Ra≤36μm.
[0016] Furthermore, the photovoltaic ribbon includes a first ribbon segment, a second ribbon segment, and a third ribbon segment connected in sequence, and two adjacent photovoltaic cells are respectively the first cell and the second cell;
[0017] The first solder strip segment is used to connect to the upper surface of the first battery cell, and the third solder strip segment is used to connect to the lower surface of the second battery cell;
[0018] The second weld strip segment is inclined relative to the upper surface and the lower surface.
[0019] A second aspect of this disclosure provides a battery string, including photovoltaic cells and the photovoltaic ribbon described in the first aspect, wherein two adjacent photovoltaic cells are connected by the photovoltaic ribbon.
[0020] This disclosure provides a photovoltaic module, including the battery string described in the second aspect, as a third aspect.
[0021] The technical solution provided in this disclosure has the following advantages compared with the prior art:
[0022] The photovoltaic ribbon provided in this embodiment includes a substrate and a black coating. The substrate includes a connecting surface disposed on the front and / or back of the substrate. The black coating is disposed on the connecting surface, which on the one hand keeps the photovoltaic ribbon similar in color to the solar cell, and on the other hand improves the anti-glare effect. The connecting surface has multiple first grooves; the black coating is disposed on the connecting surface and covers the multiple first grooves, which increases the contact area between the black coating and the substrate, improves the adhesion between the black coating and the substrate, thereby improving the stability of the connection between the black coating and the connecting surface, increasing the connection strength between the black coating and the connecting surface, and reducing the possibility of the black coating peeling off.
[0023] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description
[0024] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments, taken in conjunction with the accompanying drawings. Several embodiments of this disclosure are illustrated in the drawings by way of example and not limitation, in which:
[0025] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.
[0026] Figure 1 A schematic diagram of the structure of the photovoltaic ribbon provided in an embodiment of this disclosure is shown;
[0027] Figure 2 for Figure 1 Enlarged view of point a in the middle;
[0028] Figure 3 A top view of the substrate in a photovoltaic ribbon provided in this embodiment is shown.
[0029] Figure 4 A schematic diagram of the structure of the black coating in the photovoltaic ribbon provided in this embodiment is shown.
[0030] Explanation of the numbers in the figure: 1. First solar cell; 2. Second solar cell; 3. Photovoltaic welding ribbon; 31. Substrate; 311. First connecting surface; 311a. First groove; 312. Second connecting surface; 312a. Second groove; 32. Connecting layer; 321. Protrusion; 33. Black coating; 331. Triangular structure. Detailed Implementation
[0031] To make the objectives, features, and advantages of this disclosure more apparent and understandable, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.
[0032] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the photovoltaic ribbon 3 provided in this embodiment includes a substrate 31 and a black coating 33. The substrate 31 includes a connecting surface, which is disposed on the front and / or back of the substrate 31. The black coating 33 is disposed on the connecting surface, which on the one hand makes the photovoltaic ribbon 3 similar in color to the solar cell, and on the other hand can improve the anti-glare effect. A plurality of first grooves 311a are formed on the connecting surface; the black coating 33 is disposed on the connecting surface and covers the plurality of first grooves 311a, which can increase the contact area between the black coating 33 and the substrate 31, improve the adsorption force between the black coating 33 and the substrate 31, thereby improving the stability of the connection between the black coating 33 and the connecting surface, improving the connection strength between the black coating 33 and the connecting surface, and reducing the possibility of the black coating 33 falling off.
[0033] It should be noted that the black coating 33 covering the multiple first grooves 311a includes the black coating 33 filling the multiple first grooves 311a, or the black coating 33 filling a portion of the first grooves 311a. The black coating 33 can directly contact the inner wall of the first groove 311a, or the black coating 33 can partially contact the inner wall of the first groove 311a, or the black coating 33 can be connected through a connecting structure so that the black coating 33 does not directly contact the inner wall of the first groove 311a.
[0034] Preferably, the black coating 33 sequentially fills multiple first grooves 311a, which can improve the stability of the connection between the black coating 33 and the connecting surface.
[0035] When photovoltaic ribbon 3 is used to connect solar cells to form a battery string, the overall integrity and aesthetics of the battery string can be improved, and the anti-glare effect can be enhanced.
[0036] Optionally, adding graphite material or metal powder to the black coating 33 can improve the conductivity and weldability of the photovoltaic ribbon 3.
[0037] Optionally, the substrate 31 may be made of a tin-lead-copper alloy.
[0038] Optionally, the black coating 33 can be made of iron oxide, manganese oxide, carbon black, or black organic resin, etc.
[0039] In some specific embodiments, the first groove 311a extends along the width direction Y of the substrate 31, and multiple first grooves 311a are sequentially arranged along the length direction X of the substrate 31. This increases the contact area between the black coating 33 and the substrate 31, improves the adhesion between the black coating 33 and the substrate 31, thereby enhancing the stability and strength of the connection between the black coating 33 and the connecting surface, and reducing the possibility of the black coating 33 detaching. The width direction Y of the substrate 31 can be perpendicular to both the length direction X and the thickness direction Z of the substrate 31.
[0040] In some specific embodiments, the photovoltaic ribbon 3 further includes a connecting layer 32, which is disposed between the connecting surface and the black coating 33. The connecting layer 32 is connected to the connecting surface and the black coating 33 respectively, which can improve the adhesion between the substrate 31 and the black coating 33, improve the connection strength between the substrate 31 and the black coating 33, and reduce the possibility of the black coating 33 falling off.
[0041] The connecting layer 32 has multiple protrusions 321, the shape of which matches the shape of the first groove 311a, and the protrusions 321 and the first groove 311a engage with each other. The protrusions 321 and the first groove 311a can interlock, increasing the connection effect between the substrate 31 and the connecting layer 32, increasing the contact area between the black coating 33 and the connecting layer 32, and improving the adsorption force between the black coating 33 and the connecting layer 32. This improves the stability of the connection between the black coating 33 and the connecting layer 32, increases the connection strength between the black coating 33 and the substrate 31, and reduces the possibility of the black coating 33 falling off.
[0042] The connecting layer 32 can be made of a high molecular weight resin, and optionally, conductive additives can be added to the resin to further improve conductivity.
[0043] In some specific embodiments, the black coating 33 includes an outer surface away from the substrate 31, and a frosted layer is formed on the outer surface. The frosted surface treatment of the black coating 33 can increase the surface roughness, increase the diffuse reflection effect of light, and improve the light utilization rate.
[0044] In some specific embodiments, the black coating 33 includes an outer surface away from the substrate 31, and the outer surface is formed with a plurality of triangular structures 331, which can increase the light refraction rate, improve the light utilization rate, and to a certain extent improve the power of the photovoltaic module.
[0045] Optionally, multiple triangular structures 331 can be arranged in an array to increase the light reflection rate and improve the light utilization rate.
[0046] In some specific embodiments, the longitudinal section of the first groove 311a is triangular, trapezoidal, rectangular, or square. The longitudinal section of the first groove 311a is a section perpendicular to the width direction Y of the base 31, such as... Figure 2 As shown, the longitudinal section of the first groove 311a is trapezoidal. This can increase the contact area between the black coating 33 and the connecting layer 32 or the substrate 31, improve the adsorption force between the black coating 33 and the connecting layer 32 or the substrate 31, thereby improving the stability of the connection between the black coating 33 and the connecting layer 32 or the substrate 31, increasing the connection strength between the black coating 33 and the substrate 31, and reducing the possibility of the black coating 33 falling off.
[0047] In some specific embodiments, the thickness δ of the black coating 33 satisfies: 5μm≤δ≤30μm. When photovoltaic ribbon 3 is used to connect the cells to form a battery string, the integrity and aesthetics of the battery string can be improved, and the anti-glare effect can be enhanced.
[0048] In some specific embodiments, the black coating 33 includes an outer surface with a surface roughness Ra satisfying: 15μm≤Ra≤36μm, which can increase the diffuse reflection effect of light and improve the light utilization rate.
[0049] In some specific embodiments, the connecting surface on the front side of the substrate 31 is the first connecting surface 311, and the connecting surface on the back side is the second connecting surface 312. Both the first connecting surface 311 and the second connecting surface 312 are provided with a black coating 33, so that both sides of the substrate 31 can be used as light-receiving surfaces, thereby improving the convenience of using the photovoltaic welding ribbon 3.
[0050] Optionally, the first connecting surface 311 is formed with a plurality of first grooves 311a; the black coating 33 is disposed on the first connecting surface 311 and covers the plurality of first grooves 311a, which can increase the contact area between the black coating 33 and the substrate 31, improve the adsorption force between the black coating 33 and the substrate 31, thereby improving the stability of the connection between the black coating 33 and the first connecting surface 311, improving the connection strength between the black coating 33 and the first connecting surface 311, and reducing the possibility of the black coating 33 falling off.
[0051] Optionally, the second connecting surface 312 is formed with a plurality of second grooves 312a; the black coating 33 is disposed on the second connecting surface 312 and covers the plurality of second grooves 312a, which can increase the contact area between the black coating 33 and the substrate 31, improve the adsorption force between the black coating 33 and the substrate 31, thereby improving the stability of the connection between the black coating 33 and the second connecting surface 312, improving the connection strength between the black coating 33 and the second connecting surface 312, and reducing the possibility of the black coating 33 falling off.
[0052] Optionally, the contact surface that contacts the battery cell may not have a black coating.
[0053] In some specific embodiments, the connecting layer 32 is disposed between the second connecting surface 312 and the black coating 33. The connecting layer 32 is connected to the second connecting surface 312 and the black coating 33 respectively, which can improve the adhesion between the substrate 31 and the black coating 33, improve the connection strength between the substrate 31 and the black coating 33, and reduce the possibility of the black coating 33 falling off.
[0054] In some specific embodiments, the photovoltaic solder ribbon includes a first solder ribbon segment, a second solder ribbon segment, and a third solder ribbon segment connected in sequence. Two adjacent photovoltaic cells are designated as a first cell 1 and a second cell 2, respectively. The first solder ribbon segment is used to connect to the upper surface of the first cell 1, and the third solder ribbon segment is used to connect to the lower surface of the second cell 2. This reduces the risk of incomplete soldering, increases welding tensile strength, and improves the reliability of the cell string. The second solder ribbon segment is inclined relative to the upper and lower surfaces, effectively preventing the risk of cell edge cracking due to solder ribbon compression during the welding process.
[0055] In some specific embodiments, the second welding strip segment forms an inclined structure. The inclined structure design can effectively prevent the risk of the battery cell edge cracking due to welding strip compression during the welding process. The angle of the inclined structure is between 90° and 180°. The length of the inclined design of the second welding strip segment is related to the distance between the first battery cell 1 and the second battery cell 2, and is between 1mm and 4mm.
[0056] The battery string provided in this embodiment includes photovoltaic cells and photovoltaic ribbons 3, with two adjacent photovoltaic cells connected by photovoltaic ribbons 3.
[0057] In some specific embodiments, two adjacent photovoltaic cells are designated as first cell 1 and second cell 2. Since the photovoltaic solder ribbons 3 connect the front and back electrodes of adjacent first cell 1 and second cell 2, that is, the upper surface of the first cell 1 is connected to the lower surface of the second cell 2. The first solder ribbon segment is connected to the upper surface of the first cell 1, and the third solder ribbon segment is connected to the lower surface of the second cell 2. This reduces incomplete soldering, increases welding tensile strength, and improves the reliability of the cell string.
[0058] The photovoltaic cells provided in this disclosure include the battery strings provided in this disclosure. Since the photovoltaic cells provided in this disclosure and the battery strings provided in this disclosure have the same advantages, they will not be described again here.
[0059] It should be understood that the various forms of processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this embodiment can be achieved, and this is not limited herein.
[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.
[0061] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.
Claims
1. A photovoltaic solder strip, characterized by, The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip.
2. The photovoltaic solder strip of claim 1, wherein, The application relates to a photovoltaic solder strip.
3. The photovoltaic solder strip of claim 1, wherein, The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip.
4. The photovoltaic solder strip of claim 1, wherein, The application relates to a photovoltaic solder strip.
5. The photovoltaic solder strip of claim 1, wherein, The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip.
6. A battery string characterized in that, The application relates to a photovoltaic solder strip.
7. A photovoltaic module, characterized by The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. The application relates to a photovoltaic solder strip. 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