Photovoltaic module battery string positioning adhesive tape and photovoltaic module
By using a substrate layer of white and transparent polymer layers in the photovoltaic module positioning tape, the mirror reflection loss and cell fragmentation problems are solved, and the photoelectric performance and reliability of the photovoltaic module are improved.
Patent Information
- Application Number
- CN202421794398.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-26
AI Technical Summary
Traditional positioning tape has risks of mirror reflection loss and cell debris during the manufacturing process of photovoltaic modules, affecting the photoelectric performance of photovoltaic modules.
A substrate layer spliced with a white polymer layer and a transparent polymer layer is used to combine the adhesive layer to form a soft positioning tape, using white diffuse reflection to increase optical gain and reduce mirror reflection loss, while avoiding hidden cracks in the cell during lamination.
It improves the output power and power generation of photovoltaic modules, enhances the reliability of the modules, and avoids the hidden cracking and layering of the battery cells.
Smart Images
Figure CN223060895U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of tape materials, and particularly relates to a positioning tape for a battery string of a photovoltaic module and a photovoltaic module. Background Art
[0002] In the manufacturing process of solar cell modules, adjacent battery strings are generally fixed in the form of a positioning tape to prevent them from moving during the process of running on the production line and lamination, thus avoiding the problem of parallel string short circuit. Therefore, fixing the positioning tape is a very important link, which can make the combination of solar cells more firm and ensure its accuracy and stability.
[0003] On the one hand, the main function of the positioning tape is to position the solar cells and ensure the accuracy of the solar cells. During the combination of solar cells, any deviation of a single cell module will affect the performance of the entire cell module, while the positioning tape can accurately position each solar cell, ensuring the accuracy and stability of the entire solar cell. On the other hand, the positioning tape can also provide a protective film for the solar cells while ensuring accuracy. During the production of solar cells, pasting the positioning tape can avoid possible scratches and damages, making the surface of the solar cells smoother and avoiding the impact of surface damage on the performance of the cells.
[0004] However, the surface layer of the traditional positioning tape is relatively hard, and there is a certain risk of battery fragmentation during the subsequent lamination process of the module. At the same time, the traditional positioning tape itself has a certain specular reflection effect, which is prone to cause optical losses during use, thereby reducing the photoelectric performance of the photovoltaic module.
[0005] Therefore, in this field, there is an urgent need to develop a positioning tape for a battery string of a photovoltaic module to solve the above problems. Summary of the Utility Model
[0006] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a positioning tape for a battery string of a photovoltaic module and a photovoltaic module. The positioning tape for a battery string of a photovoltaic module provided by the utility model can not only reduce the specular reflection loss, but also improve the output power and power generation of the photovoltaic module.
[0007] To achieve the purpose of this utility model, the following technical solutions are adopted:
[0008] In the first aspect, the utility model provides a positioning tape for a battery string of a photovoltaic module, which includes an adhesive layer and a substrate layer, and the adhesive layer is arranged on the surface of the substrate layer;
[0009] The substrate layer includes a white polymer layer spliced into one body and transparent polymer layers disposed on both sides of the white polymer layer.
[0010] First, the material of the battery string positioning tape for photovoltaic modules provided by the present utility model is relatively soft, which can avoid the risk of hidden cracks in the battery chips during the subsequent lamination of the modules. Second, the substrate layer obtained by splicing a white polymer layer with a high reflectivity in the middle and transparent polymer layers with a high transmittance on both sides not only allows incident light to enter the battery string to the greatest extent, reducing specular reflection loss, but also can utilize the white diffuse reflection effect generated in the area between adjacent battery strings to increase optical gain, thereby further improving the output power and power generation of the photovoltaic module. Finally, during the subsequent lamination and fixing of the module, the substrate layer can have a crosslinking effect with the module adhesive film to avoid delamination.
[0011] In summary, the battery string positioning tape for photovoltaic modules provided by the present utility model can not only play the role of positioning the battery string, but also has the advantages of improving the reliability and optoelectronic performance of the photovoltaic module.
[0012] As a preferred technical solution of the present utility model, the white polymer layer is disposed between two adjacent strings of photovoltaic module battery strings.
[0013] In the present utility model, the white polymer layer is disposed between two adjacent strings of photovoltaic module battery strings, so that the incident light in this part of the area is fully utilized, and the white diffuse reflection is used to promote the light absorption on the front and back of the battery, thereby further improving the output power of the photovoltaic module.
[0014] As a preferred technical solution of the present utility model, the thickness of the white polymer layer is 45 - 55 μm, and for example, it can be 45 μm, 48 μm, 50 μm, 52 μm, 55 μm, etc.
[0015] As a preferred technical solution of the present utility model, the white polymer layer is a white ethylene - vinyl acetate copolymer layer.
[0016] In the present utility model, the raw materials of the white ethylene - vinyl acetate copolymer layer include ethylene vinyl acetate copolymer, crosslinking agent, antioxidant, light stabilizer, silane coupling agent, and titanium dioxide.
[0017] As a preferred technical solution of the present utility model, the transparent polymer layer is attached to the surface of the photovoltaic module battery string.
[0018] In the present utility model, the transparent polymer layer with a high transmittance is disposed on adjacent battery strings to ensure that incident light enters the battery string to the greatest extent, reducing optical loss.
[0019] As a preferred technical solution of the present utility model, the thickness of the transparent polymer layer is 45 - 55 μm, and for example, it can be 45 μm, 48 μm, 50 μm, 52 μm, 55 μm, etc.
[0020] In the present utility model, by regulating the thicknesses of the white polymer layer and the transparent polymer layer, the prepared substrate can simultaneously meet the fixing effect between adjacent battery strings and the filling effect of the area between the battery strings. If the thickness is too small, the fixing effect between adjacent battery strings will be poor; on the contrary, if there is too much filling, it will cause fragmentation between the battery strings.
[0021] As a preferred technical solution of the present utility model, the transparent polymer layer is a transparent ethylene - vinyl acetate copolymer layer.
[0022] In the present utility model, the raw materials of the transparent ethylene - vinyl acetate copolymer layer include ethylene - vinyl acetate copolymer, cross - linker, antioxidant, light stabilizer, and silane coupling agent.
[0023] In the present utility model, by selecting the materials of the white polymer layer and the transparent polymer layer, both of them have relatively soft materials, avoiding the risk of hidden cracks in the battery chips during the subsequent lamination process of the module.
[0024] As a preferred technical solution of the present utility model, the adhesive layer is located on the side of the substrate layer facing the battery strings of the photovoltaic module, thereby improving the bonding effect between the spliced substrate layer and the battery strings.
[0025] As a preferred technical solution of the present utility model, the adhesive layer is an acrylic adhesive layer.
[0026] As a preferred technical solution of the present utility model, the thickness of the adhesive layer is 45 - 55 μm, and for example, it can be 45 μm, 48 μm, 50 μm, 52 μm, 55 μm, etc.
[0027] In the second aspect, the present utility model provides a preparation method of the photovoltaic module battery string positioning tape according to the first aspect, which includes the following steps: extruding and splicing the transparent ethylene - vinyl acetate copolymer layer, the white ethylene - vinyl acetate copolymer layer, and the transparent ethylene - vinyl acetate copolymer layer in sequence, and then uniformly coating the adhesive layer on the surface of the formed product, and obtaining the photovoltaic module battery string positioning tape after winding and packaging.
[0028] In the third aspect, the present utility model provides a photovoltaic module, and the photovoltaic module includes the photovoltaic module battery string positioning tape according to the first aspect.
[0029] The battery string positioning tape for photovoltaic modules provided by the present utility model can not only play a role in positioning the battery string, but also has the advantages of improving the reliability and optoelectronic performance of the photovoltaic module.
[0030] Compared with the prior art, the present utility model has the following beneficial effects:
[0031] The present utility model provides a battery string positioning tape for photovoltaic modules. First, the material of the battery string positioning tape for photovoltaic modules provided by the present utility model is relatively soft, which can avoid the risk of hidden cracks in the battery chips during the subsequent lamination process of the module. Second, the substrate layer of the present utility model is obtained by splicing a white polymer layer with a high reflectivity in the middle and transparent polymer layers with a high transmittance on both sides. This not only allows the incident light to enter the battery string to the greatest extent, reducing the loss of specular reflection, but also can utilize the white diffuse reflection effect generated in the area between adjacent battery strings to increase the optical gain, thereby further improving the output power and power generation of the photovoltaic module. Finally, during the subsequent lamination and fixing process of the module, the substrate layer can crosslink with the module adhesive film to avoid delamination.
[0032] In summary, the battery string positioning tape for photovoltaic modules provided by the present utility model can not only play a role in positioning the battery string, but also has the advantages of improving the reliability and optoelectronic performance of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Figure 1 is a top view of the battery string positioning tape for photovoltaic modules provided by the present utility model;
[0034] Figure 2 is a cross-sectional view of the battery string positioning tape for photovoltaic modules provided by the present utility model;
[0035] Figure 3 is a schematic connection diagram of the battery string positioning tape for photovoltaic modules provided by the present utility model and the battery string;
[0036] Wherein, 1 - transparent ethylene-vinyl acetate copolymer layer, 2 - white ethylene-vinyl acetate copolymer layer, 3 - adhesive layer, 4 - battery string. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0037] The technical solution of the present utility model will be further described below by combining the drawings and specific embodiments. Those skilled in the art should understand that the embodiments are only for helping to understand the present utility model and should not be regarded as specific limitations on the present utility model.
[0038] Embodiment 1
[0039] This embodiment provides a battery string positioning tape for photovoltaic modules, as Figure 1 and Figure 2As shown in the figure, the photovoltaic module cell string positioning tape includes an acrylic adhesive layer and a substrate layer, and the acrylic adhesive is disposed on the surface of the substrate layer; the substrate layer includes a white ethylene-vinyl acetate copolymer layer spliced into one body and transparent ethylene-vinyl acetate copolymer layers disposed on both sides of the white ethylene-vinyl acetate copolymer layer.
[0040] The connection schematic diagram of the photovoltaic module cell string positioning tape provided in this embodiment and the cell string is as Figure 3 shown, wherein, the white ethylene-vinyl acetate copolymer layer is disposed between two adjacent strings of photovoltaic module cell strings, and the thickness of the white ethylene-vinyl acetate copolymer layer is 50 μm; the transparent ethylene-vinyl acetate copolymer layer is attached to the surface of the photovoltaic module cell string, and the thickness of the transparent ethylene-vinyl acetate copolymer layer is 50 μm; the acrylic adhesive layer is located on the side of the substrate layer facing the photovoltaic module cell string, and the thickness of the acrylic adhesive layer is 50 μm.
[0041] This embodiment also provides a preparation method of the above-mentioned photovoltaic module cell string positioning tape, which includes the following steps:
[0042] The transparent ethylene-vinyl acetate copolymer layer, the white ethylene-vinyl acetate copolymer layer and the transparent ethylene-vinyl acetate copolymer layer are sequentially extruded and spliced into shape, and then an adhesive layer is uniformly coated on the surface of the formed product, and the photovoltaic module cell string positioning tape is obtained after winding and packaging.
[0043] Embodiment 2
[0044] This embodiment provides a photovoltaic module cell string positioning tape, as Figure 1 and Figure 2 shown, the photovoltaic module cell string positioning tape includes an acrylic adhesive layer and a substrate layer, and the acrylic adhesive layer is disposed on the surface of the substrate layer; the substrate layer includes a white ethylene-vinyl acetate copolymer layer spliced into one body and transparent ethylene-vinyl acetate copolymer layers disposed on both sides of the white ethylene-vinyl acetate copolymer layer.
[0045] The connection schematic diagram of the photovoltaic module cell string positioning tape provided in this embodiment and the cell string is as Figure 3 shown, wherein, the white ethylene-vinyl acetate copolymer layer is disposed between two adjacent strings of photovoltaic module cell strings, and the thickness of the white ethylene-vinyl acetate copolymer layer is 45 μm; the transparent ethylene-vinyl acetate copolymer layer is attached to the surface of the photovoltaic module cell string, and the thickness of the transparent ethylene-vinyl acetate copolymer layer is 45 μm; the acrylic adhesive layer is located on the side of the substrate layer facing the photovoltaic module cell string, and the thickness of the acrylic adhesive layer is 45 μm.
[0046] This embodiment also provides a method for preparing the above-mentioned photovoltaic module cell string positioning tape, which includes the following steps:
[0047] Extrusion splicing and molding are sequentially carried out on a transparent ethylene-vinyl acetate copolymer layer, a white ethylene-vinyl acetate copolymer layer, and a transparent ethylene-vinyl acetate copolymer layer in this order. Then, an adhesive layer is uniformly coated on the surface of the molded product, and after winding and packaging, the photovoltaic module cell string positioning tape is obtained.
[0048] Example 3
[0049] This embodiment provides a photovoltaic module cell string positioning tape. As Figure 1 and Figure 2 shown, the photovoltaic module cell string positioning tape includes an acrylic adhesive layer and a substrate layer. The acrylic adhesive layer is disposed on the surface of the substrate layer; the substrate layer includes a white ethylene-vinyl acetate copolymer layer spliced into one body and transparent ethylene-vinyl acetate copolymer layers disposed on both sides of the white ethylene-vinyl acetate copolymer layer.
[0050] The connection schematic diagram of the photovoltaic module cell string positioning tape provided in this embodiment and the cell string is as Figure 3 shown. Among them, the white ethylene-vinyl acetate copolymer layer is disposed between two adjacent strings of photovoltaic module cell strings, and the thickness of the white ethylene-vinyl acetate copolymer layer is 55 μm; the transparent ethylene-vinyl acetate copolymer layer is attached to the surface of the photovoltaic module cell string, and the thickness of the transparent ethylene-vinyl acetate copolymer layer is 55 μm; the acrylic adhesive layer is located on the side of the substrate layer facing the photovoltaic module cell string, and the thickness of the acrylic adhesive layer is 55 μm.
[0051] This embodiment also provides a method for preparing the above-mentioned photovoltaic module cell string positioning tape, which includes the following steps:
[0052] Extrusion splicing and molding are sequentially carried out on a transparent ethylene-vinyl acetate copolymer layer, a white ethylene-vinyl acetate copolymer layer, and a transparent ethylene-vinyl acetate copolymer layer in this order. Then, an adhesive layer is uniformly coated on the surface of the molded product, and after winding and packaging, the photovoltaic module cell string positioning tape is obtained.
[0053] Comparative Example 1
[0054] The difference between this comparative example and Example 1 is that the substrate layer is replaced with a white ethylene-vinyl acetate copolymer layer, and the others are the same as those in Example 1.
[0055] Comparative Example 2
[0056] The difference between this comparative example and Example 1 is that the substrate layer is replaced with a transparent ethylene-vinyl acetate copolymer layer, and the others are the same as those in Example 1.
[0057] In summary, the base material layer of the present utility model is obtained by splicing a white polymer layer with a high reflectivity in the middle and transparent polymer layers with high transmittance on both sides. This not only allows incident light to enter the battery string to the greatest extent, reducing specular reflection loss, but also can utilize the white diffuse reflection effect generated in the area between adjacent battery strings to increase optical gain, thereby further improving the output power and power generation of the photovoltaic module. Finally, during the subsequent lamination and fixation of the module, the base material layer can crosslink with the module adhesive film to avoid delamination.
[0058] The applicant declares that the present utility model uses the above embodiments to illustrate the process method of the present utility model, but the present utility model is not limited to the above process steps, that is, it does not mean that the present utility model must rely on the above process steps to be implemented. Those skilled in the art should understand that any improvement to the present utility model, the equivalent substitution of the raw materials selected for the present utility model, the addition of auxiliary components, the selection of specific methods, etc. all fall within the protection scope and disclosure scope of the present utility model.
Claims
1. A positioning tape for a photovoltaic module battery string, characterized in that, The photovoltaic module cell string positioning tape includes an adhesive layer and a substrate layer, and the adhesive layer is disposed on the surface of the substrate layer; The substrate layer includes a white polymer layer spliced into one body and transparent polymer layers disposed on both sides of the white polymer layer.
2. The photovoltaic module cell string positioning tape according to claim 1, wherein The white polymer layer is disposed between two adjacent strings of photovoltaic module cell strings.
3. The photovoltaic module cell string positioning tape according to claim 1, wherein, The thickness of the white polymer layer is 45 - 55 μm.
4. The photovoltaic module cell string positioning tape according to claim 1, wherein, The white polymer layer is a white ethylene - vinyl acetate copolymer layer.
5. The photovoltaic module cell string positioning tape according to claim 1, wherein, The transparent polymer layer is attached to the surface of the photovoltaic module cell string.
6. The photovoltaic module cell string positioning tape according to claim 1, wherein, The thickness of the transparent polymer layer is 45 - 55 μm.
7. The photovoltaic module cell string positioning tape according to claim 1, wherein The transparent polymer layer is a transparent ethylene - vinyl acetate copolymer layer.
8. The photovoltaic module cell string positioning tape according to claim 1, characterized in that, The adhesive layer is located on the side of the substrate layer facing the photovoltaic module cell string.
9. The photovoltaic module cell string positioning tape according to claim 1, wherein The adhesive layer is an acrylic adhesive layer; The thickness of the adhesive layer is 45 - 55 μm.
10. A photovoltaic module, characterized in that, The photovoltaic module includes the photovoltaic module cell string positioning tape according to any one of claims 1 - 9.