Photovoltaic module
By setting grooves and protrusions on the adhesive film of the photovoltaic module, the light reflection path is optimized, and the problems of limited reflected light and large optical loss of existing photovoltaic modules are solved, achieving more efficient optical utilization and power conversion efficiency.
Patent Information
- Application Number
- CN202420344872.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-23
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-02-23
AI Technical Summary
In the process of using the module blank gap, the reflected light is limited and the reflected light path is relatively long. The light is absorbed by the film or reflected to other areas during the reflection process, resulting in large optical loss and increasing the cost of the component.
By providing grooves on the first adhesive film and bulges on the second adhesive film, the reflection path of light is optimized, the absorption loss of light during the reflection process is reduced, and the utilization rate of light reflection is improved.
It realizes more efficient utilization of the component blank gap area, improves optical utilization, shortens the reflected light path, reduces light absorption loss, and improves the power and conversion efficiency of photovoltaic modules.
Smart Images
Figure CN222602907U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic component. Background Art
[0002] In the photovoltaic field, for the packaging loss caused by the blank gaps of the cells of photovoltaic modules, the existing technology generally uses white film or gap film technology on the backlight surface to make the blank gaps reflect light and improve optical utilization. For the utilization of the gaps in the modules, the existing technology is to fill the blank gaps with materials with reflective properties. There are various filling methods. Currently, there are two main types of mass production. One is to use white film for the back film, and the other is to coat the inner side of the back plate with a grid-like white coating. Both reflect light through the white layer to utilize the gap. In the method of using white film and white coating, the reflected light is limited, and the reflected light path is long. A large part of the light is still absorbed by the film or reflected to other areas. The absorption rate is high during the reflection process, the optical loss is large, and the cost of the module is increased. Utility Model Content
[0003] Based on this, it is necessary to provide a photovoltaic module. The photovoltaic module of the utility model can better utilize the blank gap area of the module, further improve the optical utilization rate of the module, shorten the optical path of the reflected light, reduce the absorption loss of the light during the reflection process, and improve the light reflection utilization rate, thereby improving the power and conversion efficiency of the photovoltaic module.
[0004] An embodiment of the present application provides a photovoltaic module.
[0005] A photovoltaic module comprises a first panel, a first adhesive film, a battery body, a second adhesive film and a second panel which are stacked in sequence, wherein the battery body comprises a plurality of battery cells, and there is a cell gap between adjacent battery cells, wherein the first adhesive film is concavely arranged on the surface of the battery body at the cell gap to form a groove, and the second adhesive film is convexly arranged on the surface of the battery body at the cell gap to form a protrusion.
[0006] In some embodiments, the maximum depth of the groove is 50% to 60% of the thickness of the first adhesive film.
[0007] In some embodiments, the thickness of the first adhesive film is 0.2 mm to 0.5 mm.
[0008] In some embodiments, the groove is an arc-shaped groove.
[0009] In some embodiments, the width of the groove is 60% to 80% of the width of the interval between adjacent battery cells.
[0010] In some embodiments, the maximum height of the protrusion is 50% to 60% of the thickness of the second adhesive film.
[0011] In some embodiments, the thickness of the second adhesive film is 0.2 mm to 0.5 mm.
[0012] In some embodiments, the surface of the protrusion is curved.
[0013] In some embodiments, the width of the protrusion is 60% to 80% of the width of the interval between adjacent battery cells.
[0014] In some embodiments, the first panel is a glass panel, and the second panel is a glass panel or a composite material panel.
[0015] The photovoltaic module of the utility model can better utilize the blank gap area of the module, further improve the optical utilization rate of the module, shorten the optical path of reflected light, reduce the absorption loss of light during the reflection process, thereby improving the light reflection utilization rate and improving the power and conversion efficiency of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.
[0017] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same figure numbers represent the same parts.
[0018] Figure 1 This is a schematic diagram of a photovoltaic assembly according to an embodiment of the utility model;
[0019] Figure 2 This is a schematic diagram of a first adhesive film in a photovoltaic module according to an embodiment of the utility model;
[0020] Figure 3 This is a schematic diagram of a second adhesive film in a photovoltaic module according to an embodiment of the utility model;
[0021] Figure 4 This is a schematic diagram of the reflection state of the first adhesive film in the photovoltaic module according to an embodiment of the utility model, wherein: Figure 4 The arrows in the figure represent the incident and reflected rays.
[0022] Description of Reference Numerals
[0023] 10. Photovoltaic module; 100. First panel; 200. First adhesive film; 201. Groove; 300. Battery body; 400. Second adhesive film; 401. Protrusion; 500. Second panel. DETAILED DESCRIPTION
[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0028] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0030] In the present disclosure, the terms "light-receiving surface" and "backlight surface" are used only to distinguish the locations of two opposite surfaces of the battery substrate. In actual working conditions, the "light-receiving surface" is the surface of the battery substrate that mainly receives light, but the "backlight surface" does not necessarily not receive light. On the contrary, due to the existence of diffusely reflected light, the "backlight surface" can also receive light in actual working conditions.
[0031] The embodiment of the present application provides a photovoltaic module 10 to solve the problem that the white film and white coating in the prior art reflect limited light, the reflected light path is relatively long, a large part of the light is still absorbed by the film or reflected to other areas, and the cost of the module is increased. The photovoltaic module 10 will be described below in conjunction with the accompanying drawings.
[0032] The photovoltaic assembly 10 provided in the embodiment of the present application is exemplary, see Figure 1 As shown, Figure 1 The photovoltaic module 10 of the present application can make better use of the blank gap area of the module, further improve the optical utilization rate of the module, and reduce the optical path of the reflected light.
[0033] In order to more clearly illustrate the structure of the photovoltaic module 10, the photovoltaic module 10 will be introduced below with reference to the accompanying drawings. Figure 1 As shown, Figure 1 A schematic diagram of the structure of a photovoltaic module 10 provided in an embodiment of the present application.
[0034] A photovoltaic module 10 includes a first panel 100, a first adhesive film 200, a battery body 300, a second adhesive film 400 and a second panel 500 which are stacked in sequence. The battery body 300 includes a plurality of battery cells. There is a cell gap between adjacent battery cells. Figure 2As shown, Figure 2 FIG. 2 is a schematic diagram of a first adhesive film 200 in a photovoltaic module 10 according to an embodiment of the present invention. The first adhesive film 200 is recessed at a position of the sheet spacing on the surface facing the battery body 300 to form a groove 201. Figure 3 As shown, Figure 3 The second adhesive film 400 is a schematic diagram of a photovoltaic module 10 in an embodiment of the present invention. The second adhesive film 400 is protruded on the surface of the battery body 300 at the position of the sheet interval to form a protrusion 401. It should be noted that the first panel 100 is the light-receiving surface and the second panel 500 is the backlight surface.
[0035] The photovoltaic module 10 is provided with a plurality of grooves 201 on the first adhesive film 200 and a plurality of protrusions 401 on the second adhesive film 400, so that the light reflection path can be reduced, the absorption loss of light during the reflection process can be reduced, and the light reflection utilization rate can be improved. Specifically, the grooves 201 formed by the thinning process of the first adhesive film 200 can increase the proportion of incident light, reduce the absorption of light by the first adhesive film 200, and ultimately increase the effective amount of light reaching the reflective layer; the provision of the protrusions 401 can achieve a higher height of the gap reflective layer, a closer distance to the first panel 100, a shorter reflection path, and lower optical loss during the reflection process, thereby improving the effective conversion efficiency of the battery.
[0036] In some of these embodiments, see Figure 2 As shown, the maximum depth of the groove 201 is 50% to 60% of the thickness of the first adhesive film 200. It should be noted that the maximum depth of the groove 201 mentioned above refers to the depth along the thickness direction of the first adhesive film 200. For example, in one specific embodiment, the maximum depth of the groove 201 is 50% of the thickness of the first adhesive film 200. In another specific embodiment, the maximum depth of the groove 201 is 60% of the thickness of the first adhesive film 200. Preferably, the maximum depth of the groove 201 is 50% of the thickness of the first adhesive film 200.
[0037] In some embodiments, the thickness of the first adhesive film 200 is 0.2 mm to 0.5 mm. For example, in one specific embodiment, the thickness of the first adhesive film 200 is 0.2 mm. In another specific embodiment, the thickness of the first adhesive film 200 is 0.5 mm. It is not difficult to understand that in other specific examples, the thickness of the first adhesive film 200 can also be 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm or other parameters. Preferably, the thickness of the first adhesive film 200 can also be 0.4 mm.
[0038] In some embodiments, the groove 201 is an arc-shaped groove. The groove 201 being an arc-shaped groove means that the inner side wall and the bottom wall of the groove 201 are arc-shaped curved surfaces.
[0039] In some embodiments, the width of the groove 201 is 60% to 80% of the width of the interval between adjacent battery cells. For example, in one specific embodiment, the width of the groove 201 is 60% of the width of the interval between adjacent battery cells. In another specific embodiment, the width of the groove 201 is 80% of the width of the interval between adjacent battery cells. Preferably, the width of the groove 201 is 70% of the width of the interval between adjacent battery cells.
[0040] In the present application, the first adhesive film 200 is close to the light-receiving surface, and the gap between the cells is thinned to form a groove 201. The thickness of the first adhesive film 200 is generally about 0.4 mm, and the remaining thickness of the thinned portion is 40% to 50% of the normal thickness, preferably 50%, that is, the depth of the groove 201 is 50% to 60% of the first adhesive film 200. The width of the thinned portion, i.e., the groove 201, is 60% to 80% of the gap between the cells, preferably 70%. The thinning of the first adhesive film 200 can increase the proportion of incident light, reduce the absorption of light by the first adhesive film 200, and ultimately increase the effective amount of light reaching the reflective layer.
[0041] In some embodiments, the maximum height of the protrusion 401 is 50% to 60% of the thickness of the second adhesive film 400. It should be noted that the maximum height of the protrusion 401 mentioned above refers to the height along the thickness direction of the second adhesive film 400. For example, in one specific embodiment, the maximum height of the protrusion 401 is 50% of the thickness of the second adhesive film 400. In another specific embodiment, the maximum height of the protrusion 401 is 60% of the thickness of the second adhesive film 400. It is not difficult to understand that in other embodiments, the ratio of the maximum height of the protrusion 401 to the thickness of the second adhesive film 400 can be any value between 50% and 60%.
[0042] In some embodiments, the thickness of the second adhesive film 400 is 0.2 mm to 0.5 mm. For example, in one specific embodiment, the thickness of the second adhesive film 400 is 0.2 mm. In another specific embodiment, the thickness of the first adhesive film 200 is 0.5 mm. It is not difficult to understand that in other specific examples, the thickness of the second adhesive film 400 can also be 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm or other parameters. Preferably, the thickness of the second adhesive film 400 is 0.4 mm.
[0043] In some embodiments, the surface of the protrusion 401 is curved. The curved protrusion 401 can achieve a higher height of the interstitial reflective layer, a closer distance to the first panel 100, a shorter reflection light path, and lower optical loss during reflection, thereby improving the effective conversion efficiency of the battery.
[0044] In some embodiments, the width of the protrusion 401 is 60% to 80% of the width of the interval between adjacent battery cells. For example, in one specific embodiment, the width of the protrusion 401 is 60% of the width of the interval between adjacent battery cells. In another specific embodiment, the width of the protrusion 401 is 80% of the width of the interval between adjacent battery cells. Preferably, the width of the protrusion 401 is 70% of the width of the interval between adjacent battery cells.
[0045] In the present application, the surface of the second adhesive film 400 facing the battery body 300 has a white reflective layer, wherein the thickness of the second adhesive film 400 located in the gap between the battery cells is increased to form a protrusion 401, and the thickness of the increased portion is generally 50% to 60% of the thickness of the second adhesive film 400, preferably 50%. Compared with conventional adhesive films, see Figure 4 As shown, Figure 4 This is a schematic diagram of the reflection state of the second adhesive film 400 in the photovoltaic module 10 of an embodiment of the utility model. The setting of the protrusion 401 of the present application can achieve a higher height of the gap reflective layer, a closer distance to the first panel 100, a shorter reflection light path, and lower optical loss during the reflection process.
[0046] In some embodiments, the first panel 100 is a glass panel, and the second panel 500 is a glass panel or a composite material panel.
[0047] In summary, the photovoltaic module 10 of the present invention can better utilize the blank gap area of the module, further improve the optical utilization rate of the module, shorten the optical path of reflected light, reduce the absorption loss of light during the reflection process, thereby improving the light reflection utilization rate and improving the power and conversion efficiency of the photovoltaic module 10.
[0048] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0049] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0050] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A photovoltaic module (10), characterized in that: The invention comprises a first panel (100), a first adhesive film (200), a battery body (300), a second adhesive film (400) and a second panel (500) which are stacked in sequence, wherein the battery body (300) comprises a plurality of battery sheets, and there is a sheet gap between adjacent battery sheets, wherein the first adhesive film (200) is recessed on a surface of the battery body (300) at a position located at the sheet gap to form a groove (201), and the second adhesive film (400) is protruded on a surface of the battery body (300) at a position located at the sheet gap to form a protrusion (401).
2. The photovoltaic assembly (10) according to claim 1, characterized in that: The maximum depth of the groove (201) is 50% to 60% of the thickness of the first adhesive film (200).
3. The photovoltaic assembly (10) according to claim 1, characterized in that: The thickness of the first adhesive film (200) is 0.2 mm to 0.5 mm.
4. The photovoltaic assembly (10) according to claim 1, characterized in that: The groove (201) is an arc-shaped groove.
5. The photovoltaic assembly (10) according to claim 1, characterized in that: The width of the groove (201) is 60% to 80% of the width of the interval between adjacent battery cells.
6. The photovoltaic assembly (10) according to claim 1, characterized in that: The maximum height of the protrusion (401) is 50% to 60% of the thickness of the second adhesive film (400).
7. The photovoltaic module (10) according to any one of claims 1 to 6, characterized in that: The thickness of the second adhesive film (400) is 0.2 mm to 0.5 mm.
8. The photovoltaic module (10) according to any one of claims 1 to 6, characterized in that: The surface of the protrusion (401) is curved.
9. The photovoltaic module (10) according to any one of claims 1 to 6, characterized in that: The width of the protrusion (401) is 60% to 80% of the width of the interval between adjacent battery cells.
10. The photovoltaic module (10) according to any one of claims 1 to 6, characterized in that: The first panel (100) is a glass panel, and the second panel (500) is a glass panel or a composite material panel.