Composite adhesive film photovoltaic module and packaging method thereof

Abstract

The invention belongs to the technical field of solar photovoltaics, and discloses a composite adhesive film photovoltaic module and a packaging method thereof. The composite adhesive film photovoltaic module comprises a first glass layer, a first transparent adhesive film layer, a battery array layer, a second transparent adhesive film layer, a porcelain white adhesive film layer, a reflective gap film layer and a second glass layer which are stacked in sequence. According to the composite adhesive film photovoltaic module, the ceramic white adhesive film with high reflection performance is laid around the module, so that the power of the module can be better improved; the edge of the module is provided with a porcelain white adhesive film with high reflection performance, thereby effectively reflecting and utilizing sunlight in an unutilized area of the edge, reducing energy waste, and improving the efficiency and power of the module. The compatibility of the porcelain white adhesive film and the transparent adhesive film is high, the problems of bubble abnormity, deviation, gap film distortion and the like after lamination do not exist, the poor manufacturing process can be effectively controlled, and the yield of the assembly is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of solar photovoltaic technology, and in particular to a composite adhesive film photovoltaic component and a packaging method thereof. Background Art

[0002] The photovoltaic industry continues to take cost reduction and efficiency improvement as the general direction of industrial development. Among the existing efficiency improvement solutions, gap film has the most obvious efficiency improvement. The gap film is used to reuse the secondary reflection of light to achieve a significant increase in component power.

[0003] However, because the gap film cannot be well integrated with the glass and adhesive film at the edge of the module, when the gap film is set at the edge of the module, problems such as abnormal bubbles and abnormal distortion of the gap film often occur around the edge after lamination. Therefore, how to improve the efficiency of the module while keeping process defects under control is a technical problem that the industry urgently needs to solve. Summary of the invention

[0004] The object of the present invention is to provide a composite adhesive film photovoltaic module and a packaging method thereof, which can better improve the power of the module.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] The present invention provides a composite film photovoltaic module, the composite film photovoltaic module comprising:

[0007] First glass layer;

[0008] a first transparent adhesive film layer, wherein the first transparent adhesive film layer is disposed on a surface of one side of the first glass layer along a thickness direction;

[0009] A battery array layer, the battery array layer being disposed on a surface of the first transparent adhesive film layer on a side away from the first glass layer;

[0010] A second transparent adhesive film layer, wherein the second transparent adhesive film layer is disposed on a surface of the battery array on a side away from the first transparent adhesive film layer;

[0011] A porcelain white adhesive film layer, wherein the porcelain white adhesive film layer is in a hollow shape and is arranged on the edges of the side of the second transparent adhesive film layer away from the battery array layer;

[0012] A reflective gap film layer, wherein the reflective gap film layer is arranged on a surface of the porcelain white adhesive film layer away from the second transparent adhesive film layer;

[0013] The second glass layer is arranged on the surface of the reflective adhesive film layer away from the porcelain white adhesive film layer.

[0014] Preferably, the thickness of the first glass layer is 1 to 5 mm. Exemplarily, the thickness of the first glass layer may be 1.6, 2, 2.8, 3.2 mm, etc. In the present invention, the length and width of the first glass layer and the second glass layer are not limited, and can meet the common photovoltaic front panel glass size in the market.

[0015] Preferably, the thickness of the first transparent adhesive film layer is 200-800 μm; the length of the first transparent adhesive film layer is equal to the length of the first glass layer; the width of the first transparent adhesive film layer is 0-20 mm smaller than the width of the first glass layer. Exemplarily, the thickness of the first transparent adhesive film layer can be 200 μm, 300 μm, 400 μm, 500 μm, 600 μm, 700 μm, 800 μm, etc., and the width of the first transparent adhesive film layer can be 2 mm, 4 mm, 6 mm, 8 mm, 10 mm, etc. smaller than the width of the first glass layer.

[0016] Preferably, the arrangement of the batteries in the battery array layer includes at least one of 6×16, 6×18, 6×20, 6×22, ​​6×24, and 6×26.

[0017] Preferably, the thickness of the second transparent adhesive film layer is 200-800 μm; the length of the second transparent adhesive film layer is equal to the length of the first glass layer; the width of the second transparent adhesive film layer is 0-20 mm smaller than the width of the first glass layer. Exemplarily, the thickness of the second transparent adhesive film layer can be 200 μm, 300 μm, 400 μm, 500 μm, 600 μm, 700 μm, 800 μm, etc., and the width of the first transparent adhesive film layer can be 2 mm, 4 mm, 6 mm, 8 mm, 10 mm, etc. smaller than the width of the first glass layer.

[0018] Preferably, the thickness of the porcelain white adhesive film layer is 200-800 μm; the width of the porcelain white adhesive film layer laid around the second transparent adhesive film layer is 15-50 mm. Exemplarily, the thickness of the porcelain white adhesive film layer can be 200 μm, 300 μm, 400 μm, 500 μm, 600 μm, 700 μm, 800 μm, etc., and the width of the porcelain white adhesive film layer laid around the second transparent adhesive film layer can be 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, etc.

[0019] In the present invention, the porcelain white glue film layer is in a hollow shape in the middle, and specifically, is composed of four porcelain white glue film strips.

[0020] Preferably, the porcelain white glue film layer is pre-crosslinked, the pre-crosslinking degree of the white glue film part in the porcelain white glue film layer is 20-80%, and the melting index of the porcelain white glue film layer is 5-20 g / 10 min.

[0021] In the present invention, the porcelain white film adopts a co-extruded film, which is divided into two layers, including a transparent film layer and a white film layer, wherein the white film layer adopts a low melt index, pre-crosslinked design, the melt index range is 5 to 20g / 10min, and the pre-crosslinking degree range is 20 to 80%. At the same time, the proportion of the white film layer in the overall porcelain white film needs to be controlled within 1 / 2. This design solves the problem of white filler dispersion after lamination; the transparent film layer adopts a non-pre-crosslinked type, and when laying, the surface where the transparent layer of film is located is laid close to the battery cell. The texture of this surface of the film is relatively soft and can effectively solve the problem of broken fragments.

[0022] According to the present invention, the first transparent adhesive film layer and the second transparent adhesive film layer can be selected from existing adhesive films, for example, Foster EP304, Foster F406PS, Foster F406DC, Foster F806 / TF8, Svek CO-556, Svek SV-15296P, Svek SV-15297HA, Svek CO-557HA, Haiyouwei P507, Haiyouwei S201MT1, Haiyouwei S201MT2(c), Haiyouwei S201MT2 or Haiyouwei P507T2.

[0023] According to the present invention, the porcelain white adhesive film layer can be made of existing adhesive films, for example, Foster F806W, Sveck SV-15297W or Hiuwei S201W.

[0024] According to the present invention, the reflective gap film layer is preferably a reflective gap film tape. Preferably, the reflective gap film can be selected from existing reflective gap film tapes. Exemplarily, it can be purchased from Heyu.

[0025] Optionally, the reflective gap film layer is composed of a plurality of gap film strips, each of which is centrally arranged along the gap between the battery cells in the battery array, and is ultimately distributed in a mesh pattern, and its distribution range does not exceed the range of the entire battery array.

[0026] Preferably, the thickness of the second glass layer is 1-5 mm. Exemplarily, the thickness of the first glass layer may be 1.6, 2, 2.8, 3.2 mm, etc.

[0027] Preferably, the first glass layer and the second glass layer have the same length and width.

[0028] The present invention also provides a method for packaging a composite film photovoltaic module, comprising the following steps:

[0029] The first glass layer, the first transparent adhesive film layer, the battery array layer, the second transparent adhesive film layer, the porcelain white adhesive film layer, the reflective gap film layer and the second glass layer are stacked in sequence and then pressed to obtain a composite adhesive film photovoltaic module.

[0030] Preferably, the pressing temperature is 140-160°C, the pressing time is 400-700s, and the vacuum time during the pressing is 350-550s. Exemplarily, the pressing temperature can be 140°C, 145°C, 148°C, 150°C, 154°C, 155°C, 160°C, etc., the pressing time can be 350s, 400s, 450s, 500s, 550s, etc., and the vacuum time during the pressing can be 350s, 400s, 450s, 500s, 550s, etc.

[0031] It can be seen from the above technical solution that compared with the prior art, the present invention has the following beneficial effects:

[0032] Provided are a composite film photovoltaic module using a conventional transparent film in the middle of the module and a porcelain white film at the edge of the module, and a packaging method thereof. The porcelain white film with high reflective performance is laid around the module to better improve the power of the module. The porcelain white film with high reflective performance is used at the edge of the module to effectively reflect and utilize sunlight from unused areas of the edge, reduce energy waste, and improve module efficiency and power. The porcelain white film is highly compatible with the transparent film, and there are no problems such as abnormal bubbles, offset, and gap film distortion. Process defects can be effectively controlled, greatly improving the module yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below.

[0034] Figure 1 Schematic diagram of the composite adhesive film photovoltaic module of the present invention; wherein 1 is the first glass layer, 2 is the first transparent adhesive film layer, 3 is the battery array layer, 4 is the second transparent adhesive film layer, 5 is the porcelain white adhesive film layer, 6 is the reflective gap film layer, and 7 is the second glass layer;

[0035] Figure 2 The EL test results of the composite film photovoltaic module in Example 1. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example 1

[0038] The first glass layer, the first transparent adhesive film layer, the battery array layer, the second transparent adhesive film layer, the porcelain white adhesive film layer, the reflective gap film layer and the second glass layer are stacked in sequence, and then pressed at 150° C. for 400 seconds, and vacuum is simultaneously drawn during the pressing process to obtain a composite adhesive film photovoltaic module;

[0039] The porcelain white film layer is a rectangle with a hollow middle. Four porcelain white film strips are laid on the edges of the second transparent film layer and aligned with the edge of the first glass layer. The width of the porcelain white film layer is 30 mm.

[0040] The size of the first glass layer is 2376mm×1128mm×2mm

[0041] The size of the first transparent film layer is 2376mm×1124mm×0.5mm;

[0042] The arrangement of batteries in the battery array layer is 6×22;

[0043] The size of the second transparent film layer is 2376mm×1124mm×0.5mm;

[0044] The size of the reflective gap film layer is 2162mm×1075mm×0.125mm;

[0045] The size of the second glass layer is 2376mm×1128mm×2mm;

[0046] The first transparent adhesive film layer and the second transparent adhesive film layer were purchased from Foster, model EP304;

[0047] The porcelain white adhesive film layer was purchased from Foster, model F806W;

[0048] The reflective film layer is a reflective gap film purchased from Heyu.

[0049] The composite film photovoltaic module prepared in Example 1 was subjected to EL testing, and the test results are as follows: Figure 2 As shown. Figure 2 It can be seen that the performance of the composite film photovoltaic module provided by the present invention can reach the detection standard.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A composite film photovoltaic module, characterized in that: The composite film photovoltaic module comprises: First glass layer; a first transparent adhesive film layer, wherein the first transparent adhesive film layer is disposed on a surface of one side of the first glass layer along a thickness direction; A battery array layer, the battery array layer being disposed on a surface of the first transparent adhesive film layer on a side away from the first glass layer; A second transparent adhesive film layer, wherein the second transparent adhesive film layer is disposed on a surface of the battery array on a side away from the first transparent adhesive film layer; A porcelain white adhesive film layer, wherein the porcelain white adhesive film layer is in a hollow shape and is arranged on the edges of the side of the second transparent adhesive film layer away from the battery array layer; A reflective gap film layer, wherein the reflective gap film layer is arranged on a surface of the porcelain white adhesive film layer away from the second transparent adhesive film layer; The second glass layer is arranged on the surface of the reflective gap film layer on a side away from the porcelain white glue film layer.

2. The composite film photovoltaic module according to claim 1, characterized in that: The thickness of the first glass layer is 1-5 mm.

3. The composite film photovoltaic module according to claim 1, characterized in that: The thickness of the first transparent adhesive film layer is 200-800 μm; the length of the first transparent adhesive film layer is equal to the length of the first glass layer; and the width of the first transparent adhesive film layer is 0-20 mm smaller than the width of the first glass layer.

4. The composite film photovoltaic module according to claim 1, characterized in that: The arrangement of the batteries in the battery array layer includes at least one of 6×16, 6×18, 6×20, 6×22, ​​6×24, and 6×26.

5. The composite film photovoltaic module according to claim 1, characterized in that: The thickness of the second transparent adhesive film layer is 200-800 μm; the length of the second transparent adhesive film layer is equal to the length of the first glass layer; and the width of the second transparent adhesive film layer is 0-20 mm smaller than the width of the first glass layer.

6. The composite film photovoltaic module according to claim 1, characterized in that: The thickness of the porcelain white adhesive film layer is 200 to 800 μm; the porcelain white adhesive film layer is composed of four porcelain white adhesive film strips, the width of the porcelain white adhesive film strips is 15 to 50 mm, and the length and width after combination are the same as the first glass layer; the white adhesive film part in the porcelain white adhesive film layer is pre-cross-linked, the pre-cross-linking degree of the medium white adhesive film part in the porcelain white adhesive film layer is 20 to 80%, and the melting index of the white adhesive film part in the porcelain white adhesive film layer is 5 to 20 g / 10 min; the transparent adhesive film part in the porcelain white adhesive film layer is non-pre-cross-linked.

7. The composite film photovoltaic module according to claim 1, characterized in that: The reflective gap film layer is composed of multiple long film strips distributed in a mesh shape, with a film strip thickness of 50 to 200 μm and a film strip width of 1 to 8 mm, and the film strip length does not exceed the length or width of the battery array.

8. The composite adhesive film photovoltaic module according to any one of claims 1 to 7, characterized in that: The thickness of the second glass layer is 1-5 mm.

9. The method for packaging a composite adhesive film photovoltaic module according to claim 1 or 2, characterized in that: The following steps are involved: The first glass layer, the first transparent adhesive film layer, the battery array layer, the second transparent adhesive film layer, the porcelain white adhesive film layer, the reflective gap film layer and the second glass layer are stacked in sequence and then pressed to obtain a composite adhesive film photovoltaic module.

10. The packaging method of composite film photovoltaic module according to claim 9, characterized in that: The lamination temperature is 140-160° C., the lamination time is 400-700 seconds, and the vacuuming time during the lamination is 350-550 seconds.

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