Photovoltaic synergistic film with high power gain

Abstract

The utility model discloses a photovoltaic synergistic film with high power gain. The photovoltaic synergistic film sequentially comprises a metal layer, an organic polymer film layer, a light-proof protective layer and a bonding layer from top to bottom, the metal layer, the organic polymer film layer, the light-proof protective layer and the bonding layer are fixedly connected. According to the utility model, the metal layer is combined with the polymer film layer with the thickness of 38-55 [mu] m, so that the obtained photovoltaic synergistic film is good in mechanical property, not easy to deform and crack in the use process, and excellent in mechanical effect. According to the utility model, the thickness of the metal layer is controlled to be 25-50nm, so that the problem of point-like leakage in partial areas is avoided, the metal layer is not enabled to present a mirror surface effect, and the power gain is prevented from being reduced. The reflectivity of the photovoltaic synergistic film provided by the utility model is higher than that of glass glaze and common white joint strips in the traditional technology, and the power gain of the photovoltaic synergistic film provided by the utility model is remarkable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of semiconductor device composition, concretely relates to a high power gain's photovoltaic synergistic membrane. BACKGROUND

[0002] With the application of photovoltaic power generation energy technology more and more widely, how to improve the power output efficiency of photovoltaic module, improve the power generation capacity is the problem of photovoltaic field to be solved. The technical personnel in the field set up photovoltaic synergistic membrane in the non-active shadow area of photovoltaic module (the area where the incident light is not absorbed to carry out photovoltaic or photoelectric conversion), increase the incident light, improve the photovoltaic efficiency. But the synergistic effect of the existing photovoltaic synergistic membrane is not high, and there is the problem of aging and yellowing after long-term use, therefore, it is very important to develop a photovoltaic synergistic membrane with high reflectivity, high power gain and aging resistance.

[0003] Chinese utility model patent CN209515687U discloses a kind of photovoltaic module by being set in the light reflection film of cell piece longitudinal and transverse gap, so that solar light located at cell piece gap can be effectively utilized, the area of photovoltaic module that is not cell piece is fully utilized, solar light incident into photovoltaic module is maximized, thereby effectively improve the output power of photovoltaic module, but weather resistance is not good, yellowing problem is prone to in short time, leading to photovoltaic synergistic membrane efficiency decline or even structural damage and not play the role of synergistic effect. Chinese utility model patent CN211125672U discloses a kind of photovoltaic synergistic membrane, a plurality of angular protrusions are provided on the upper surface of the structural layer in parallel, the cross section of the angular protrusion is isosceles triangle, the length direction is consistent with the length direction of the cell piece, and the protrusion angle is greater than 90 °, the light reflection film with special structure can greatly improve the light utilization efficiency of the whole photovoltaic film component, but the angle of the structural layer needs to be strictly controlled, and the processing technology is complex and cumbersome, with high cost. UTILITY MODEL CONTENT

[0004] In order to develop a photovoltaic synergistic membrane with high reflectivity, high power gain and aging resistance, the first aspect of the utility model provides a high power gain photovoltaic synergistic membrane, which comprises a metal layer, an organic polymer film layer, a light-proof protective layer and a bonding layer from top to bottom.

[0005] As a preferred embodiment, the metal layer further comprises an insulating layer above the metal layer, and the insulating layer and the metal layer are fixedly connected.

[0006] As a preferred embodiment, the surface of the metal layer is a matte structure with irregular structure.

[0007] As a preferred embodiment, the metal layer is connected with the organic polymer film layer by vacuum evaporation, and the light-proof protective layer is connected with the organic polymer film layer by vacuum evaporation or coating.

[0008] As a preferred embodiment, the thickness of the metal layer is 10-2000nm.

[0009] As a preferred embodiment, the thickness of the metal layer is 10-45nm.

[0010] As a preferred embodiment, the thickness of the metal layer is 30-40nm.

[0011] As a preferred embodiment, the thickness of the metal layer is 38nm.

[0012] As a preferred embodiment, the thickness of the light-proof protective layer is 10-5000nm.

[0013] As a preferred embodiment, the thickness of the light-proof protective layer is 10-50nm.

[0014] As a preferred embodiment, the thickness of the light-proof protective layer is 38nm.

[0015] As a preferred embodiment, the thickness of the organic polymer film layer is 30-60μm.

[0016] As a preferred embodiment, the thickness of the organic polymer film layer is 38-55μm.

[0017] As a preferred embodiment, the thickness of the organic polymer film layer is 50μm.

[0018] The inventor found that the metal layer needs to be combined with the organic polymer film layer with a thickness of 38-55μm, when the thickness of the organic polymer film layer is too thin, it may be stretched and deformed during use, causing poor quality, and having adverse effects on the mechanical strength of the product; when the thickness of the organic polymer film layer is too thick, it may cause internal stress in the assembly, easily causing the assembly to break, and also increasing the cost of the film itself.

[0019] The inventor further found that the thickness of the metal layer needs to be controlled between 25-50nm, too thin thickness may cause point-like bottom leakage in some areas, and too thick thickness may easily make the metal layer present a mirror effect, effectively reducing the reflection of light, thereby reducing the power gain.

[0020] As a preferred embodiment, the adhesive layer is connected with the light-proof protective layer by adhesion.

[0021] As a preferred embodiment, the thickness of the adhesive layer is 50-100 μm.

[0022] As a preferred embodiment, the thickness of the adhesive layer is 70 μm.

[0023] As a preferred embodiment, the reflectivity of the high-power gain photovoltaic synergistic film is ≥90%.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] (1) the utility model discloses a high-power gain photovoltaic synergistic film, and the metal layer is combined with the polymer film layer with the thickness of 38-55 μm, and the obtained photovoltaic synergistic film has good mechanical properties and is not easy to deform and crack in the use process, and the mechanical effect is excellent.

[0026] (2) the utility model discloses a high-power gain photovoltaic synergistic film, and the thickness of the metal layer is controlled between 25-50nm, so that the problem of partial area point-shaped bottom leakage does not appear, and the metal layer does not present the mirror surface effect, and the power gain is avoided to reduce.

[0027] (3) the utility model discloses a high-power gain photovoltaic synergistic film, and the light-proof protective layer and the organic polymer film layer are connected through vacuum evaporation or coating, and the light-proof protective layer with the metal plating layer or inorganic coating is formed, which can effectively prevent yellowing and greatly improve the weather resistance.

[0028] (4) the utility model discloses a high-power gain photovoltaic synergistic film, and the reflectivity is higher than that of the glass glaze and ordinary white tape in the traditional process, and the power gain of the photovoltaic synergistic film of the utility model is remarkable.

[0029] (5) the utility model discloses a high-power gain photovoltaic synergistic film, and the preparation process is simple, and the production cost is low, so that large-scale development and production can be carried out. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is the structure schematic view of the photovoltaic synergistic film of the utility model embodiment 1.

[0031] In the drawing: 1. metal layer, 2. organic polymer film layer, 3. light-proof protective layer, 4. adhesive layer

[0032] Figure 2 It is the physical picture of the photovoltaic synergistic film of the utility model embodiment 1.

[0033] Figure 3 It is the structure schematic view of the light weight directional plating aluminum film of the utility model comparative example 1.

[0034] Figure 4The structure diagram of the light redirecting aluminized film of the utility model new type proportion 2.

[0035] In the figure: 5. Reflective layer; 6. Base material layer. DETAILED DESCRIPTION

[0036] Example 1

[0037] The specific structure is shown in Figure 1 , and the physical diagram is shown in Figure 2 : a high-power gain photovoltaic synergistic film, from top to bottom, comprising a metal layer 1, an organic polymer film layer 2, a light-proof protective layer 3 and a bonding layer 4; the metal layer 1, the organic polymer film layer 2, the light-proof protective layer 3 and the bonding layer 4 are fixedly connected.

[0038] The metal layer 1 and the organic polymer film layer 2 are connected by vacuum evaporation, and the light-proof protective layer 3 and the organic polymer film layer 2 are connected by vacuum evaporation.

[0039] The metal layer 1 is a matte aluminum layer. The organic polymer film layer 2 is a transparent PET film. The light-proof protective layer 3 is a metal aluminum layer. The bonding layer 4 is EVA glue.

[0040] The bonding layer 4 and the light-proof protective layer 3 are connected by adhesion.

[0041] The thickness of the metal layer 1 is 38 nm, the thickness of the organic polymer film layer 2 is 50 μm, the thickness of the light-proof protective layer 3 is 38 nm, and the thickness of the bonding layer 4 is 70 μm.

[0042] Example 2

[0043] A high-power gain photovoltaic synergistic film, the specific embodiment is the same as that of example 1, and the difference lies in that the metal layer 1 is a mirror surface aluminum layer, the thickness of the metal layer 1 is 40 nm, and the thickness of the light-proof protective layer 3 is 40 nm.

[0044] Example 3

[0045] A high-power gain photovoltaic synergistic film, the specific embodiment is the same as that of example 1, and the difference lies in that the metal layer 1 and the organic polymer film layer 2 are connected by spraying, and the metal layer 1 is an aluminum silver powder coating layer.

[0046] The thickness of the metal layer 1 is 10 μm, and the thickness of the light-proof protective layer 3 is 5 μm.

[0047] Example 4

[0048] A high-power gain photovoltaic synergistic film, the specific embodiment is the same as that of example 1, and the difference lies in that the light-proof protective layer 3 is a white paint layer. The thickness of the light-proof protective layer 3 is 5 μm.

[0049] Comparative Example 1

[0050] A photovoltaic synergistic film with high power gain, the specific implementation is the same as Example 1, the difference is that the metal layer 1 is a light-redirecting aluminized film. The thickness of the metal layer 1 is 35 nm, and the thickness of the light-protecting layer 3 is 35 nm. The structure of the light-redirecting aluminized film is shown in Figure 3 .

[0051] Comparative Example 2

[0052] The specific structure is shown in Figure 4 A photovoltaic synergistic film, from top to bottom, includes a reflective layer 5, a substrate layer 6, the reflective layer 5 is a glass glaze, and the substrate layer 6 is glass.

[0053] The reflective layer 5 and the substrate layer 6 are connected by coating.

[0054] The thickness of the reflective layer 5 is 20 μm, and the thickness of the substrate layer 6 is 50 μm.

[0055] Comparative Example 3

[0056] A photovoltaic synergistic film, the specific implementation is the same as Comparative Example 2, the difference is that the reflective layer 5 is white paint, and the substrate layer 6 is white PET film.

[0057] The thickness of the reflective layer 5 is 10 μm, and the thickness of the substrate layer 6 is 5 μm.

[0058] Performance test

[0059] 1. Reflectivity: The reflectivity of Examples 1-4 and Comparative Examples 1-3 was tested according to the standard GB / T 20503-2006 using an ultraviolet spectrophotometer.

[0060] 2. Power gain: The power gain of Examples 1-4 and Comparative Examples 1-3 was tested according to the standard GB / T 39857-2021.

[0061] The test results are shown in Table 1.

[0062] Table 1

[0063] Reflectance / % Power gain / W Example 1 94 3.1 Example 2 95 1.3 Example 3 71 1 Example 4 94 3.1 Comparative Example 1 93 3.3 Comparative Example 2 77 1.2 Comparative Example 3 85 2.0

[0064] The glass glaze of Comparative Example 2 needs to be sintered in a glass factory, the process flow is relatively complex, the energy consumption and cost are relatively high, and the final power gain is not ideal.

[0065] The common white coating gap film of Comparative Example 3 is simpler in process and lower in cost at the component end compared with the glass glaze, but because of the mechanism of diffuse reflection, the inorganic coating loses more light on the surface of the reflection layer after the component lamination process, so the light utilization rate is low, and the power gain is also not ideal.

[0066] The light power gain of the light redirecting aluminized film of Comparative Example 1 is close to that of the utility model, but the process is complex, and the production cost is high.

Claims

1. A high power gain photovoltaic booster film characterized in that, From top to bottom, it comprises a metal layer, an organic polymer film layer, a light-proof protective layer and a bonding layer; the metal layer, the organic polymer film layer, the light-proof protective layer and the bonding layer are fixedly connected.

2. The high power gain photovoltaic booster film according to claim 1, wherein, The metal layer further comprises an insulating layer above the metal layer, and the insulating layer and the metal layer are fixedly connected.

3. The high power gain photovoltaic booster film of claim 1, wherein, The surface of the metal layer is a matte structure with irregular structure.

4. The high power gain photovoltaic booster film of claim 1, wherein, The metal layer and the organic polymer film layer are connected by vacuum evaporation, and the light-proof protective layer and the organic polymer film layer are connected by vacuum evaporation or coating.

5. The high power gain photovoltaic booster film of claim 1, wherein, The thickness of the metal layer is 10-2000 nm.

6. The high power gain photovoltaic booster film of claim 1, wherein, The thickness of the light-proof protective layer is 10-5000 nm.

7. The high power gain photovoltaic booster film of claim 1, wherein, The thickness of the organic polymer film layer is 30-60 μm.

8. The high power gain photovoltaic booster film of claim 1, wherein, The bonding layer and the light-proof protective layer are connected by adhesion.

9. The high power gain photovoltaic booster film of claim 1, wherein, The thickness of the bonding layer is 50-100 μm.

10. The high power gain photovoltaic booster film of claim 1, wherein, The reflectivity of the high-power gain photovoltaic synergistic film is greater than or equal to 90%.

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