Heat-conducting photovoltaic gap film

Abstract

The utility model relates to the technical field of photovoltaic modules, in particular to a heat-conducting photovoltaic gap film, which comprises a main film body, the upper surface of the main film body is provided with a reflecting prism surface area and a heat-conducting block area, and the heat-conducting block area is divided into a plurality of grids which are uniformly embedded in the reflecting prism surface area; the main film body comprises a reflecting film, a film carrying sheet and a heat conduction film which are sequentially arranged in a laminated mode from top to bottom, convex rib strips which are arranged in a fluctuating mode are arranged on the upper surface of the reflecting film, a reflected light plating layer is arranged on the upper surfaces of the convex rib strips, and a plurality of heat conduction blocks embedded in the reflecting film are connected to the heat conduction film. The heat conduction block penetrates through the film carrying sheet and is arranged up and down; the heat-conducting photovoltaic gap film provided by the utility model is convenient to integrally install in a photovoltaic assembly; the application of the large-area heat conductor realizes the conduction of heat in the assembly to the back plate to be dissipated, and the heat dissipation efficiency is high; and the light reflection area is arranged, so that heat absorption and temperature rise of the area can be reduced, part of light can be reflected to the battery piece, and the photovoltaic power generation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic components, in particular to a heat-conducting photovoltaic gap film. Background Art

[0002] Photovoltaic modules absorb a large amount of heat during operation. If the heat cannot be dissipated in a timely and effective manner, the internal temperature of the module will rise, thereby affecting the photoelectric conversion efficiency. If the heat cannot be dissipated in a timely and effective manner, it will have a negative impact on the performance and life of the photovoltaic modules.

[0003] Thermally conductive gap film is a material used on photovoltaic cells. Its main function is to fill the gaps between cell components, while improving the thermal conductivity of the components and enhancing the weather resistance of the components in harsh environments.

[0004] PV interstitial films play a vital role in the performance and reliability of PV module applications. With the continuous advancement of technology and materials science, continuous upgrades to PV interstitial film technology are enabling more efficient and advanced PV power generation solutions. Summary of the Invention

[0005] The purpose of the utility model is to provide a technically improved thermal conductive photovoltaic gap film, which can quickly conduct heat out of the photovoltaic module to prevent heat accumulation, thereby maintaining the photovoltaic module operating within a suitable temperature range.

[0006] In order to solve the above technical problems, the solution adopted by the present invention is as follows:

[0007] A thermally conductive photovoltaic gap film comprises a main film body, wherein the upper surface of the main film body is provided with a reflective prism area and a thermally conductive block area, wherein the thermally conductive block area is divided into a plurality of grids and is evenly embedded in the reflective prism area;

[0008] The main film body includes a reflective film, a film carrier and a heat-conducting film stacked in sequence from top to bottom. The upper surface of the reflective film is provided with undulating convex ribs, and the upper surface of the convex ribs is provided with a reflective light coating. The heat-conducting film is connected to a number of heat-conducting blocks embedded in the reflective film, and the heat-conducting blocks are arranged above and below the film carrier.

[0009] Furthermore, the convex rib strip is in the shape of a triangular prism, one side of which is in contact with the reflective film and is arranged with the side facing upward relative to the rib, and the reflective light coating is a mercury layer.

[0010] Furthermore, edge locking frames are vertically provided on the four edges of the film carrier sheet, and the edge locking frames surround and wrap around the periphery of the reflective film and the heat-conducting film.

[0011] Furthermore, the hardness of the components in the main film body is: film carrier > heat conductive film = heat conductive block > reflective film.

[0012] Furthermore, the seams between the reflective film and the heat-conductive film and the edge-locking frame are filled with weather-resistant glue.

[0013] Furthermore, the reflective film is provided with an opening for embedding the heat-conducting block, and the convex ribs are arranged to avoid the opening.

[0014] Furthermore, the thickness of the main film is 90 to 700 μm.

[0015] Furthermore, the heat-conducting block area is used to be arranged under the photovoltaic module cell sheet, and the reflective surface area is used to be arranged under the gap between the photovoltaic module cell sheets.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The utility model discloses a heat-conducting photovoltaic gap membrane, which is provided with a film carrier sheet to carry the upper and lower double membranes, so as to facilitate the installation of the whole into the photovoltaic module; the application of a large-area heat conductor can conduct the heat in the module to the back plate for dissipation, with high heat dissipation efficiency, and dissipate the heat in a timely and effective manner; a light reflection area is provided, which can not only reduce the heat absorption and temperature rise in the area, but also reflect part of the light to the battery cell, thereby improving the efficiency of photovoltaic power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the top structure of the utility model;

[0020] Figure 3 for Figure 2 Schematic diagram of the AA section structure;

[0021] Figure 4 for Figure 3 The enlarged schematic diagram of point B in the middle;

[0022] Figure 5 This is a schematic diagram of the working state of the reflective light coating of the present invention.

[0023] In the figure: 1, main film body; 1a, reflective film; 1a-1, rib strip; 1a-2, reflective light coating; 1b, film carrier; 1b-1, edge protection frame; 1c, thermal conductive film; 1d, thermal conductive block. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0025] like Figures 1 to 5As shown, a heat-conducting photovoltaic gap film includes a main film body 1 with a total thickness of 90 to 700 μm. The upper surface of the main film body 1 is provided with a reflective prism area and a heat-conducting block area. The heat-conducting block area is divided into a number of squares and evenly embedded in the reflective prism area; the heat-conducting block area is used to be arranged under the photovoltaic module cell to transfer the heat of the cell to the large area of ​​the backplane for heat dissipation, and the reflective prism area is used to be arranged under the gap between the photovoltaic module cells to reflect sunlight irradiating the area.

[0026] Specifically, in order to achieve the above technical purpose, the main film body 1 includes a reflective film 1a, a film carrier 1b and a heat-conducting film 1c stacked in sequence from top to bottom. The upper surface of the reflective film 1a is provided with undulating ribs 1a-1. The ribs 1a-1 can be as follows: Figure 2 The ribs 1a-1 are arranged longitudinally as shown, and can also be arranged transversely. The upper surface of the ribs 1a-1 is provided with a mercury reflective coating 1a-2. The ribs 1a-1 are triangular prisms, one side of which is in contact with the reflective film 1a and the side facing upwards. Figure 5 The light is irradiated on the light reflecting inclined surface on the rib strip 1a-1 and is effectively reflected. A part of it is reflected to the cell through the upper glass plate, increasing the amount of light entering the cell. At the same time, the high reflectivity can reduce the heat absorption in this area and slow down the heating rate.

[0027] Connected to the thermally conductive film 1c are several thermally conductive blocks 1d embedded in the reflective film 1a. The reflective film 1a has openings for the thermally conductive blocks 1d to fit into, and the ribs 1a-1 are positioned to avoid these openings. The thermally conductive film 1c and the thermally conductive blocks 1d are made of graphene, with a thermal conductivity of 0.8 to 1 W / m•K. The thermally conductive blocks 1d extend through the upper and lower surfaces of the film carrier 1b. The upper surface of the film carrier 1b is attached to the reflective film 1a, while the lower surface is attached to the thermally conductive film 1c. The hardness relationship is: film carrier 1b > thermally conductive film 1c = thermally conductive blocks 1d > reflective film 1a. The harder film carrier 1b flattens the upper and lower films, facilitating their installation into the photovoltaic module.

[0028] A vertically positioned edge-locking frame 1b-1 surrounds the film carrier 1b, wrapping around the reflective film 1a and thermally conductive film 1c. The edge of the edge-locking frame 1b-1 is connected to the PV module frame. Weather-resistant adhesive seals the seams between the reflective film 1a, the thermally conductive film 1c, and the edge-locking frame 1b-1. This frame protects the edges of the reflective and thermally conductive films 1a, 1c, and conducts heat to the PV module frame.

[0029] The thermally conductive photovoltaic gap film of the utility model is thin, light and soft, easy to install and fit in the photovoltaic module without adding excessive weight and volume. It can quickly conduct the heat inside the photovoltaic module during operation to prevent heat accumulation, thereby maintaining the photovoltaic module operating within a suitable temperature range, which helps to improve the power generation efficiency and stability of the photovoltaic module and extend its service life.

[0030] The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, any changes, modifications or additions should be included in the protection scope of the present invention.

Claims

1. A thermally conductive photovoltaic gap film, characterized in that: It comprises a main film body (1), wherein the upper surface of the main film body (1) is provided with a reflective prism area and a heat conduction block area, and the heat conduction block area is divided into a plurality of squares and is evenly embedded in the reflective prism area; The main film body (1) comprises a reflective film (1a), a film carrier (1b) and a heat-conducting film (1c) stacked in sequence from top to bottom; the upper surface of the reflective film (1a) is provided with undulating convex ribs (1a-1); the upper surface of the convex ribs (1a-1) is provided with a reflective light coating (1a-2); the heat-conducting film (1c) is connected to a plurality of heat-conducting blocks (1d) embedded in the reflective film (1a); the heat-conducting blocks (1d) are arranged above and below the film carrier (1b).

2. The thermally conductive photovoltaic gap film according to claim 1, characterized in that: The convex rib strip (1a-1) is in the shape of a triangular prism, one side of which is in contact with the reflective film (1a) and is arranged with the side facing upward relative to the rib, and the reflective light coating layer (1a-2) is a mercury layer.

3. The thermally conductive photovoltaic gap film according to claim 1, characterized in that: Edge-locking frames (1b-1) are vertically arranged on the four edges of the film carrier sheet (1b), and the edge-locking frames (1b-1) surround and wrap around the periphery of the reflective film (1a) and the heat-conducting film (1c).

4. The thermally conductive photovoltaic gap film according to claim 1, characterized in that: The hardness of the components in the main film body (1) is as follows: film carrier (1b) > heat-conducting film (1c) = heat-conducting block (1d) > reflective film (1a).

5. The thermally conductive photovoltaic gap film according to claim 3, characterized in that: The joints between the reflective film (1a) and the heat-conducting film (1c) and the edge-locking frame (1b-1) are filled with weather-resistant glue.

6. The thermally conductive photovoltaic gap film according to claim 2, characterized in that: The reflective film (1a) is provided with an opening for embedding the heat-conducting block (1d), and the rib strip (1a-1) is arranged to avoid the opening.

7. The thermally conductive photovoltaic gap film according to claim 1, characterized in that: The thickness of the main membrane (1) is 90-700 μm.

8. The thermally conductive photovoltaic gap film according to claim 7, characterized in that: The heat-conducting block area is used to be arranged under the photovoltaic module cell sheet, and the reflective surface area is used to be arranged under the gap between the photovoltaic module cell sheets.

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