Grid ink photovoltaic adhesive film and photovoltaic module
By using a low melt index substrate layer and a high reflectivity grid ink layer in photovoltaic modules, the problems of insufficient light utilization between cells and high-temperature deformation were solved, thus enabling the production of high-efficiency photovoltaic modules.
Patent Information
- Application Number
- CN202422991285.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-04
AI Technical Summary
In existing photovoltaic modules, light at the gaps between cells cannot be fully utilized, resulting in energy loss. Furthermore, the mesh-like adhesive film is prone to deformation and damage during high-temperature lamination, affecting the yield rate.
A substrate layer with a low melt flow index and a grid ink layer are used, combined with a PVB layer and an EVA/POE layer. The heat resistance is improved through pre-crosslinking treatment, and a high reflectivity is set in the grid ink layer to fill the gaps between the cells to reflect light.
It improves the power generation efficiency of photovoltaic modules, avoids grid deformation damage, simplifies the structure, and increases the yield rate.
Smart Images
Figure CN223561508U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to photovoltaic adhesive film technical field, concretely relates to a grid ink photovoltaic adhesive film, photovoltavoltac assembly. BACKGROUND
[0002] High conversion efficiency and low manufacturing cost have been the goal of photovoltaic power generation. At present, due to the gap between the battery pieces in the photovoltaic module, the light irradiated on the place cannot be fully absorbed and utilized by the battery piece, causing energy loss, resulting in the module efficiency being lower than the battery piece efficiency.
[0003] In view of the above problems, the grid adhesive film emerges as the times require, which sets up a high reflection layer at the gap between the battery pieces to utilize the reflection of sunlight at the gap to improve the power generation efficiency. Therefore, reserving the reflection grid on the adhesive film is a common practice in the adhesive film field, but in actual production, high-temperature lamination is easy to cause deformation and damage of the reserved grid on the adhesive film, resulting in low yield.
[0004] Therefore, how to avoid the deformation and damage of the reserved reflection grid on the adhesive film under high-temperature lamination is a technical problem to be solved in the field.
[0005] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background technology of the present application, and therefore, the above description is not considered to constitute the information of the prior art. CONTENT OF THE UTILITY MODEL
[0006] The embodiments of the present disclosure at least provide a kind of grid ink photovoltaic adhesive film, photovoltaic module.
[0007] In a first aspect, the embodiments of the present disclosure provide a grid ink photovoltaic adhesive film, comprising: a substrate layer and a PVB layer covering the surface of the substrate layer; and a grid ink layer printed on the side of the PVB layer away from the substrate layer; wherein the melt index of the PVB layer is 0.2-1 g / 10 min; and the melt index of the substrate layer is 2-5 g / 10 min.
[0008] In an optional embodiment, the thickness of the grid ink layer is 10 microns-20 microns.
[0009] In an optional embodiment, the substrate layer is EVA or POE.
[0010] In an optional embodiment, the thickness of the substrate layer is not more than 500 microns.
[0011] In an optional embodiment, the thickness of the PVB layer is not more than 500 microns.
[0012] In an optional embodiment, the reflectivity of the grid-shaped grid ink photovoltaic adhesive film is not less than 60%.
[0013] In an alternative embodiment, the transparent area of the grid ink layer is consistent with the shape of the cell piece laid by the assembly, and the grid of the grid ink layer is suitable for filling the gap between the cell pieces laid by the assembly.
[0014] In an alternative embodiment, the grid width of the grid ink layer is 75-210 μm.
[0015] In an alternative embodiment, the grid height of the grid ink layer is 75-210 μm.
[0016] In a second aspect, the embodiments of the present disclosure further provide a grid ink photovoltaic adhesive film, comprising: any one of a single-layer EVA layer, a POE layer, and a PVB layer as a substrate layer plus a grid ink layer; the EVA layer and the POE layer substrate layer need to be pre-crosslinked; and the PVB layer has a melt index of 0.2-1 g / 10 min.
[0017] In an alternative embodiment, the crosslinking degree of the EVA layer and the POE layer substrate layer is 20-40%.
[0018] In an alternative embodiment, the thickness of the substrate layer is not more than 800 microns.
[0019] In an alternative embodiment, the reflectivity at the grid of the grid ink photovoltaic adhesive film is not less than 60%.
[0020] In an alternative embodiment, the grid width of the grid ink layer is 75-210 mm.
[0021] In a third aspect, the embodiments of the present disclosure further provide a photovoltaic assembly, comprising: the grid ink photovoltaic adhesive film as described above; and the grid transparent area of the grid ink photovoltaic adhesive film is laid with cell pieces.
[0022] The grid ink photovoltaic adhesive film and the photovoltaic assembly of the present application use a low-melt-point substrate layer, which overcomes the defect that the grid adhesive film is not resistant to high-temperature lamination, and the grid ink has a reflectivity better than that of the adhesive film, so that the original reflective strip in the grid adhesive film is no longer needed, the efficiency of the assembly is further improved, and the structure is simplified.
[0023] Other features and advantages of the present application will be set forth in the following description of the application, and in part will become apparent to those skilled in the art upon examination of the following or can be learned from practice of the application. The objects and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
[0024] In order to make the above objects, features and advantages of the present application more obvious, the following preferred embodiments are described in detail, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS
[0025] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0026] Figure 1 A structure diagram of a double-layer grid ink photovoltaic adhesive film provided by the embodiment of the present application is shown in the figure.
[0027] Figure 2 A structure diagram of a double-layer grid ink photovoltaic adhesive film provided by the embodiment of the present application is shown in the figure.
[0028] Figure 3 A structure diagram of a single-layer grid ink photovoltaic adhesive film provided by the embodiment of the present application is shown in the figure.
[0029] In the figure:
[0030] 1, base material layer; 2, grid ink layer; 3, battery piece;
[0031] 11, EVA layer; 12, POE layer; 13, PVB layer. DETAILED DESCRIPTION
[0032] In order to make the above objects, features and advantages of the present application more obvious, the following preferred embodiments are described in detail, and the accompanying drawings are described as follows.
[0033] As used herein, the phrases “in an embodiment,” “according to an embodiment,” “in some embodiments,” and the like generally mean the particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of the present disclosure. Thus, features, structures, or characteristics can be included in more than one embodiment of the present disclosure, and the phrases “in an embodiment” and the like cannot only specify a single embodiment. As used herein, the terms “example,” “exemplary,” and the like are used as a means to present concepts in a concrete manner. Any implementation, aspect or design described herein as an “example” or “exemplary” is not necessarily to be construed as preferred or advantageous over other implementations, aspects or designs.
[0034] In this document, example embodiments of the present disclosure will be described in greater detail. As used herein, expressions such as “at least one of,” when preceding a list of two or more items, modify the entire list of items and do not modify the list of items as a whole. For example, the expression “at least one of a, b, and c” should be understood as including only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.
[0035] The terminology used herein is for the purpose of describing particular example configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” can be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises,” “comprising,” “including,” and “having” are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are discussed or illustrated, unless specifically identified as an order of performance. Additional or alternative steps can be employed.
[0036] Some embodiments of the present application will be described in detail below with reference to the drawings. The following embodiments and features in the embodiments can be combined with each other as long as there is no conflict.
[0037] Please refer to Figure 1 and Figure 2 As shown in Figure 1 and Figure 2 The present disclosure provides a grid ink photovoltaic adhesive film, comprising: a substrate layer and a PVB layer covering the surface of the substrate layer; and a grid ink layer printed on the side of the PVB layer away from the substrate layer; wherein the melt index of the PVB layer is 0.2-1 g / 10 min; and the melt index of the substrate layer is 2-5 g / 10 min, and the test standard of the melt index is referred to ISO 1133.
[0038] In some embodiments, in particular, the thickness of the grid ink layer is 10-20 microns.
[0039] In some embodiments, in particular, the substrate layer is EVA or POE.
[0040] In some embodiments, in particular, the thickness of the substrate layer is not more than 500 microns.
[0041] In some embodiments, in particular, the thickness of the PVB layer is not more than 500 microns.
[0042] In some embodiments, in particular, the reflectivity at the grid of the grid ink photovoltaic adhesive film is not less than 60%.
[0043] In some embodiments, in particular, the transparent area of the grid ink layer is consistent with the shape of the cell piece laid by the assembly, and the grid of the grid ink layer is suitable for filling the gap between the cell pieces laid by the assembly.
[0044] In some embodiments, in particular, the grid width of the grid ink layer is 75-210 microns.
[0045] In some embodiments, in particular, the grid height of the grid ink layer is 75-210 microns.
[0046] Please refer to Figure 3 As shown in Figure 3 The present disclosure also provides a grid ink photovoltaic adhesive film, comprising: any one of a single-layer EVA layer, a POE layer, a PVB layer as a substrate layer plus a grid ink layer; the EVA layer, the POE layer substrate layer needs to be pre-crosslinked; the melt index of the PVB layer is 0.2-1 g / 10 min.
[0047] In some embodiments, in particular, the crosslinking degree of the EVA layer, the POE layer substrate layer is 20-40%, and the pre-crosslinked substrate layer can realize that the single-layer substrate layer meets the high temperature resistance of the POE+PVB or EVA+PVB double-layer substrate layer.
[0048] In some embodiments, in particular, the thickness of the substrate layer is not more than 800 microns.
[0049] In some embodiments, in particular, the reflectivity at the grid of the grid ink photovoltaic adhesive film is not less than 60%.
[0050] In some embodiments, in particular, the grid width of the grid ink layer is 75-210 mm.
[0051] This disclosure also provides a photovoltaic module, including: a grid-ink photovoltaic film as described above; the grid transparent area of the grid-ink photovoltaic film is covered with solar cells.
[0052] Specifically, choose such as Figure 3 The single-layer grid ink photovoltaic film with the structure shown was used to obtain the photovoltaic module of Example 1. After the substrate layer was pre-crosslinked, the degree of crosslinking was 30% and the thickness of the grid layer was 10 micrometers. Under high temperature conditions, no deformation occurred because the melt index of the substrate layer was low.
[0053] Specifically, photovoltaic modules made using commercially available mesh-like adhesive films exhibit significant twisting and deformation at the edges after lamination.
[0054] In summary, this grid ink photovoltaic film and photovoltaic module overcome the defect of grid film's inability to withstand high-temperature lamination by using a low melt index substrate layer. At the same time, the grid ink has a higher reflectivity than the film, thus eliminating the need for the reflective strips that must be set in the original grid film. This further improves the efficiency of the module while simplifying the structure.
[0055] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A grid ink photovoltaic encapsulant film, characterized by, It comprises: a substrate layer and a PVB layer covering the surface of the substrate layer; and a grid ink layer printed on the side of the PVB layer away from the substrate layer; wherein the melt index of the PVB layer is 0.2-1 g / 10 min; and the melt index of the substrate layer is 2-5 g / 10 min.
2. The grid ink photovoltaic adhesive film of claim 1, wherein the thickness of the grid ink layer is 10-20 microns.
3. The grid ink photovoltaic adhesive film of claim 1, wherein the substrate layer is EVA or POE.
4. The grid ink photovoltaic adhesive film of claim 1, wherein the thickness of the substrate layer is no more than 500 microns; the thickness of the PVB layer is no more than 500 microns.
5. The grid ink photovoltaic adhesive film of claim 1, wherein the reflectivity of the grid-shaped part of the grid ink photovoltaic adhesive film is no less than 60%.
6. The grid ink photovoltaic adhesive film of claim 1, wherein the transparent area of the grid ink layer is consistent with the shape of the cell pieces laid by the assembly, and the grid of the grid ink layer is suitable for filling the gaps between the cell pieces laid by the assembly.
7. The grid ink photovoltaic adhesive film of claim 1, wherein the grid width of the grid ink layer is 75-210 mm; the grid height of the grid ink layer is 75-210 mm.
8. A grid ink photovoltaic encapsulant film, characterized by, It comprises: any one of single-layer EVA layer, POE layer, PVB layer as substrate layer plus grid ink layer; the EVA layer, POE layer substrate layer needs to be pre-crosslinked; the melt index of the PVB layer is 0.2-1 g / 10 min.
9. The grid ink photovoltaic adhesive film of claim 8, wherein the crosslinking degree of the EVA layer, POE layer substrate layer is 20-40%.
10. The grid ink photovoltaic adhesive film of claim 9, wherein the thickness of the substrate layer is no more than 800 microns.
11. The grid ink photovoltaic adhesive film of claim 9, wherein the reflectivity of the grid-shaped part of the grid ink photovoltaic adhesive film is no less than 60%.
12. The grid ink photovoltaic adhesive film of claim 9, wherein the grid width of the grid ink layer is 75-210 mm.
13. A photovoltaic module, characterized by It comprises: the grid ink photovoltaic adhesive film of any one of claims 1-12; the grid transparent area of the grid ink photovoltaic adhesive film is laid with cell pieces.