A lightweight photovoltaic module and its preparation method and application

Abstract

The present invention provides a lightweight photovoltaic module and a preparation method and application thereof, wherein the lightweight photovoltaic module comprises a module front plate and a module back plate, wherein the module front plate comprises a weather-resistant transparent film, a first adhesive film layer, a transparent back plate, a second adhesive film layer, a solar cell sheet and a third adhesive film layer which are stacked in sequence, and the module back plate comprises an insulating layer, a fourth adhesive film layer and a honeycomb panel which are stacked in sequence, wherein the third adhesive film layer and the insulating layer are arranged adjacent to each other. In the present invention, the module back plate is first prepared, and then the module front plate laminate and the module back plate are laminated, composited, rapidly cooled and laminated, and shaped, so that the obtained photovoltaic module has a straight, flat and beautiful appearance, excellent reliability, and the preparation method is simple and easier to operate.

Description

Technical Field

[0001] The invention belongs to the technical field of solar cells and relates to a lightweight photovoltaic component and a preparation method and application thereof. Background Art

[0002] At present, the conventional solar panels have a large mass of about 15Kg / m due to the rigidified glass layer and aluminum alloy frame. 2 This severely limits the use of photovoltaic modules on roofs with weak load-bearing capacity. At present, the industry has developed lightweight modules, but most of them are flexible photovoltaic modules. Such flexible photovoltaic modules often cannot pass the rigorous tests of dynamic and static loads, and there are reliability risks in actual use. However, rigid lightweight modules have great differences in material properties, making it difficult to solve the reliability problem of modules, and the process operation is complex and has many steps. Therefore, the overall difficulty of developing rigid lightweight modules is relatively high at present, and the development of a lightweight module with convenient process and superior reliability has broad market prospects.

[0003] CN111584677A discloses a method for preparing a lightweight photovoltaic module with hard characteristics. The first step is to connect multiple solar cells in series to form a solar cell array; the second step is to stack the polymer backplane and the first packaging board from bottom to top, and then stack the foamed polymer, and place at least one layer of the first grid board below and / or above the foamed polymer, and then continue to stack the second packaging board and the solar cell array completed in the first step, and finally continue to stack the third packaging board and the last layer of transparent board; the third step is to turn over the stacked parts completed in the second step so that the original upward side faces downward, and put it into a laminator to complete the hot lamination process. The photovoltaic module made by this invention has good mechanical strength and is lightweight. However, the process of this invention is relatively complicated.

[0004] Therefore, in this field, it is urgent to develop a lightweight photovoltaic module that is rigid, has simple process steps, and has reliable performance. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a lightweight photovoltaic module and a preparation method and application thereof.

[0006] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a lightweight photovoltaic module, comprising a module front panel and a module back panel, wherein the module front panel comprises a weather-resistant transparent film, a first adhesive film layer, a transparent back panel, a second adhesive film layer, a solar cell sheet and a third adhesive film layer stacked in sequence, and the module back panel comprises an insulating layer, a fourth adhesive film layer and a honeycomb panel stacked in sequence, wherein the third adhesive film layer and the insulating layer are adjacent to each other.

[0008] In the present invention, a weather-resistant honeycomb panel material is used as the rear panel of the component, which can provide rigid support while taking into account the lightweight of the photovoltaic component.

[0009] Preferably, the material of the weather-resistant transparent film includes PVDF or ETFE.

[0010] Preferably, the thickness of the weather-resistant transparent film is 25-100 μm, for example, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm or 100 μm, etc.

[0011] Preferably, the material of the first adhesive film layer, the second adhesive film layer, the third adhesive film layer and the fourth adhesive film layer independently includes any one of EVA, POE, epoxy resin or acrylic resin.

[0012] Preferably, the first adhesive film layer and the fourth adhesive film layer have a grammage of 180-220 g / m 2 , for example 180g / m 2 , 185g / m 2 , 190g / m 2 , 195g / m 2 , 200g / m 2 , 205g / m 2 , 210g / m 2 , 215g / m 2 or 200g / m 2 wait.

[0013] Preferably, the weight of the second adhesive film layer and the third adhesive film layer is independently 400-500 g / m 2 , for example 400g / m 2 , 410g / m 2 , 420g / m 2 , 430g / m 2 , 440g / m 2 , 450g / m 2 , 460g / m 2 , 470g / m 2 , 480g / m2 , 490g / m 2 or 500g / m 2 wait.

[0014] Preferably, the transparent back plate is made of any one of transparent PET, transparent glass fiber or transparent PC.

[0015] Preferably, the thickness of the transparent backplane is not less than 160 μm, for example, 160 μm, 200 μm, 240 μm, 260 μm, 280 μm, 300 μm, 400 μm, 600 μm or 700 μm, etc., preferably 160-600 μm.

[0016] Preferably, the material of the insulating layer includes PET.

[0017] Preferably, the thickness of the insulating layer is not less than 160 μm, for example, 160 μm, 180 μm, 200 μm, 220 μm, 240 μm, 280 μm, 300 μm or 400 μm, etc., preferably 160-240 μm.

[0018] Preferably, the honeycomb panel comprises any one of a metal honeycomb panel, a PP honeycomb panel or a PET honeycomb panel, preferably an aluminum honeycomb panel.

[0019] Preferably, the weight density of the metal honeycomb panel is 2.95 kg / m 2 .

[0020] Preferably, the thickness of the upper and lower metal plates of the metal honeycomb panel is 0.28-0.34 mm, for example, 0.28 mm, 0.29 mm, 0.30 mm, 0.31 mm, 0.32 mm, 0.33 mm or 0.34 mm, etc., the internal honeycomb core is a hollow hexagonal prism shape, the height of the honeycomb core is 9-10 mm, for example, 9 mm, 9.5 mm or 10 mm, etc., the side length of the honeycomb core is 6 mm (hexagonal prism side length), and the wall thickness is 0.05 mm (hexagonal prism wall thickness).

[0021] Preferably, the surface of the metal honeycomb panel is embossed to improve the overall appearance texture and aesthetics. The honeycomb panel has been pre-perforated and the edges and corners have been chamfered, which simplifies the subsequent component production operation process.

[0022] In a second aspect, the present invention provides a method for preparing the lightweight photovoltaic module according to the first aspect, the preparation method comprising the following steps:

[0023] (1) laminating and compounding the honeycomb panel, the fourth adhesive film layer and the insulating layer, and post-processing to obtain a component rear panel;

[0024] (2) Using tempered glass as the support of the module front plate, stacking a weather-resistant transparent film, a first adhesive film layer, a transparent back plate, a second adhesive film layer, a solar cell sheet and a third adhesive film layer in order from bottom to top to obtain a module front plate laminate;

[0025] (3) laminating the front panel laminate and the rear panel of the module to obtain a composite member, wherein the third adhesive film layer and the insulating layer of the rear panel of the module are placed adjacent to each other;

[0026] (4) Rapidly cooling and laminating the composite member of step (3) to obtain the lightweight photovoltaic module.

[0027] In the present invention, during the lamination process of the component front panel, tempered glass is used as the support of the component front panel (weather-resistant honeycomb panel can also be used as the support of the component front panel), which facilitates the normal flow and lamination operation of the component on the assembly line without affecting the normal testing of the photovoltaic component EL.

[0028] Compared with the one-step lamination method, that is, stacking all material layers in sequence and then laminating in one step, the present invention first prepares the component rear plate and then laminates the component front plate laminate and the component rear plate. The preparation process is simpler and easier to operate.

[0029] In the present invention, the rapid cooling and laminating shaping operation in step (4) releases the thermal shrinkage force between the materials in the component, and the component discharged after cooling has a straight, flat and beautiful appearance and excellent reliability.

[0030] In the present invention, rapid cooling and lamination shaping refers to rapidly transferring the composite in step (3) from an environment of 135-165°C to an environment of 10-40°C, and cooling and laminating at 10-40°C for 90-510s.

[0031] Preferably, the lamination temperature in step (1) is 115-135°C, for example, 115°C, 120°C, 125°C, 130°C or 135°C, and the lamination time is 90-240s, for example, 90s, 120s, 150s, 180s, 200s or 240s.

[0032] Preferably, the lamination pressure in step (1) is 20-70 kPa, such as 20 kPa, 30 kPa, 40 kPa, 50 kPa, 60 kPa or 70 kPa.

[0033] Preferably, the post-processing in step (1) includes chamfering the openings.

[0034] Preferably, the lamination temperature in step (3) is 135-165°C, such as 135°C, 140°C, 145°C, 150°C, 155°C, 160°C or 165°C, and the lamination time is 360-510s, such as 360s, 380s, 400s, 420s, 440s, 460s, 480s, 500s or 510s, etc. At this time, the front panel laminate and the weather-resistant honeycomb panel have reached reliable cross-linking conditions.

[0035] Preferably, the lamination pressure in step (3) is 20-70 kPa, such as 20 kPa, 30 kPa, 40 kPa, 50 kPa, 60 kPa or 70 kPa.

[0036] Preferably, the temperature of the cooling lamination in step (4) is 10-40°C, for example 10°C, 20°C, 30°C or 40°C, and the time of cooling lamination is 90-510s, for example 90s, 120s, 180s, 210s, 240s, 300s, 330s, 360s, 420s, 450s, 480s, 500s or 510s, etc.

[0037] In a third aspect, the present invention provides application of the lightweight photovoltaic module described in the first aspect in a roof or a street lamp.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] (1) In the present invention, a weather-resistant honeycomb panel material is used as the rear panel of the module, which can provide rigid support while taking into account the lightweight of the photovoltaic module.

[0040] (2) In the present invention, the module rear plate is first prepared, and then the module front plate laminate and the module rear plate are laminated, rapidly cooled and laminated to shape. The resulting photovoltaic module has a straight, flat and beautiful appearance and excellent reliability (power attenuation: 1.01%-1.62%). In addition, the preparation method is simple and easier to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic structural diagram of a lightweight photovoltaic assembly provided in Example 1 of the present invention.

[0042] Among them, 1-weather-resistant transparent film, 2-first adhesive film layer, 3-transparent back plate, 4-second adhesive film layer, 5-solar cell sheet, 6-third adhesive film layer, 7-insulating layer, 8-fourth adhesive film layer, 9-honeycomb panel. DETAILED DESCRIPTION

[0043] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0044] Example 1

[0045] In this embodiment, a method is provided as Figure 1 The lightweight photovoltaic module shown includes a module front panel and a module back panel, the module front panel includes a weather-resistant transparent film 1, a first adhesive film layer 2, a transparent back panel 3, a second adhesive film layer 4, a solar cell 5 and a third adhesive film layer 6 stacked in sequence, the module back panel includes an insulating layer 7, a fourth adhesive film layer 8 and a honeycomb panel 9 stacked in sequence, wherein the third adhesive film layer 6 and the insulating layer 7 are adjacent to each other.

[0046] The material of the weather-resistant transparent film is PVDF with a thickness of 50 μm; the materials of the first film layer, the second film layer, the third film layer and the fourth film layer are all EVA; the weight of the first film layer and the fourth film layer is 200 g / m 2 The weight of the second and third film layers is 450g / m 2 The transparent back panel is made of transparent PET with a thickness of 260μm; the insulating layer is made of PET with a thickness of 160μm; the honeycomb panel is an aluminum honeycomb panel with a weight density of 2.95kg / m 2 The thickness of the upper and lower aluminum skins is 0.32mm, the internal honeycomb core is a hollow hexagonal prism shape, the height of the honeycomb core is 9.5mm, the side length of the honeycomb core is 6mm (hexagonal prism side length), and the wall thickness is 0.05mm (hexagonal prism wall thickness).

[0047] The preparation method comprises the following steps:

[0048] (1) laminating the honeycomb panel, the fourth adhesive film layer and the insulating layer at 125° C. for 160 seconds and a pressure of 50 kPa, chamfering and opening holes to obtain a component rear panel;

[0049] (2) Using tempered glass as the support of the module front plate, stacking a weather-resistant transparent film, a first adhesive film layer, a transparent back plate, a second adhesive film layer, a solar cell sheet and a third adhesive film layer in order from bottom to top to obtain a module front plate laminate;

[0050] (3) laminating the front panel laminate and the rear panel of the module at 150° C. for 440 seconds and a pressure of 50 kPa to obtain a composite member, wherein the third adhesive film layer and the insulating layer of the rear panel of the module are placed adjacent to each other;

[0051] (4) Rapidly cooling and laminating the composite member of step (3) to obtain the lightweight photovoltaic module at a cooling and laminating temperature of 20° C. and a cooling and laminating time of 300 seconds.

[0052] Example 2

[0053] In this embodiment, a lightweight photovoltaic module is provided, which includes a module front plate and a module back plate, the module front plate includes a weather-resistant transparent film, a first adhesive film layer, a transparent back plate, a second adhesive film layer, a solar cell and a third adhesive film layer stacked in sequence, and the module back plate includes an insulating layer, a fourth adhesive film layer and a honeycomb panel stacked in sequence, wherein the third adhesive film layer and the insulating layer are adjacent to each other.

[0054] The material of the weather-resistant transparent film is PVDF with a thickness of 25 μm; the materials of the first film layer, the second film layer, the third film layer and the fourth film layer are all POE; the weight of the first film layer and the fourth film layer is 200 g / m 2 The weight of the second and third film layers is 400g / m 2 The transparent back panel is made of transparent PC with a thickness of 400μm; the insulating layer is made of PET with a thickness of 180μm; the honeycomb panel is an aluminum honeycomb panel with a weight density of 2.95kg / m 2 The thickness of the upper and lower aluminum skins is 0.32mm, the internal honeycomb core is a hollow hexagonal prism shape, the height of the honeycomb core is 9.5mm, the side length of the honeycomb core is 6mm, and the wall thickness is 0.05mm.

[0055] The preparation method comprises the following steps:

[0056] (1) laminating the honeycomb panel, the fourth adhesive film layer and the insulating layer at 115° C. for 240 seconds and a pressure of 70 kPa, chamfering and opening holes to obtain a component rear panel;

[0057] (2) Using tempered glass as the support of the module front plate, stacking a weather-resistant transparent film, a first adhesive film layer, a transparent back plate, a second adhesive film layer, a solar cell sheet and a third adhesive film layer in order from bottom to top to obtain a module front plate laminate;

[0058] (3) laminating the front panel laminate and the rear panel of the module at 135° C. for 510 seconds and a pressure of 70 kPa to obtain a composite member, wherein the third adhesive film layer and the insulating layer of the rear panel of the module are placed adjacent to each other;

[0059] (4) Rapidly cooling and laminating the composite member of step (3) to obtain the lightweight photovoltaic module at a cooling and laminating temperature of 10° C. and a cooling and laminating time of 510 s.

[0060] Example 3

[0061] In this embodiment, a lightweight photovoltaic module is provided, which includes a module front plate and a module back plate, the module front plate includes a weather-resistant transparent film, a first adhesive film layer, a transparent back plate, a second adhesive film layer, a solar cell and a third adhesive film layer stacked in sequence, and the module back plate includes an insulating layer, a fourth adhesive film layer and a honeycomb panel stacked in sequence, wherein the third adhesive film layer and the insulating layer are adjacent to each other.

[0062] The material of the weather-resistant transparent film is ETFE with a thickness of 100 μm; the materials of the first film layer and the fourth film layer are both EVA; the materials of the second film layer and the third film layer are both POE; the weight of the first film layer and the fourth film layer is 200 g / m 2 The weight of the second and third film layers is 500g / m 2 The transparent back panel is made of transparent PC with a thickness of 600μm; the insulating layer is made of PET with a thickness of 200μm; the honeycomb panel is an aluminum honeycomb panel with a weight density of 2.95kg / m 2 The thickness of the upper and lower aluminum skins is 0.32mm, the internal honeycomb core is a hollow hexagonal prism shape, the height of the honeycomb core is 9.5mm, the side length of the honeycomb core is 6mm, and the wall thickness is 0.05mm.

[0063] The preparation method comprises the following steps:

[0064] (1) laminating the honeycomb panel, the fourth adhesive film layer and the insulating layer at 135° C. for 90 seconds and a pressure of 20 kPa, chamfering and opening holes to obtain a component rear panel;

[0065] (2) Using tempered glass as the support of the module front plate, stacking a weather-resistant transparent film, a first adhesive film layer, a transparent back plate, a second adhesive film layer, a solar cell sheet and a third adhesive film layer in order from bottom to top to obtain a module front plate laminate;

[0066] (3) laminating the front panel laminate and the rear panel of the module at 165° C. for 360 seconds and a pressure of 20 kPa to obtain a composite member, wherein the third adhesive film layer and the insulating layer of the rear panel of the module are placed adjacent to each other;

[0067] (4) Rapidly cooling and laminating the composite member of step (3) to obtain the lightweight photovoltaic module at a cooling and laminating temperature of 40° C. and a cooling and laminating time of 90 seconds.

[0068] Example 4

[0069] In this embodiment, a lightweight photovoltaic module is provided, which includes a module front plate and a module back plate, the module front plate includes a weather-resistant transparent film, a first adhesive film layer, a transparent back plate, a second adhesive film layer, a solar cell and a third adhesive film layer stacked in sequence, and the module back plate includes an insulating layer, a fourth adhesive film layer and a honeycomb panel stacked in sequence, wherein the third adhesive film layer and the insulating layer are adjacent to each other.

[0070] The material of the weather-resistant transparent film is ETFE with a thickness of 40 μm; the materials of the first film layer and the fourth film layer are POE; the materials of the second film layer and the third film layer are EVA; the weight of the first film layer and the fourth film layer is 200 g / m 2 ; The weight of the second film layer is 480g / m 2 The weight of the third film layer is 440g / m 2 The transparent back panel is made of transparent PET with a thickness of 280μm; the insulating layer is made of PET with a thickness of 220μm; the honeycomb panel is an aluminum honeycomb panel with a weight density of 2.95kg / m 2 The thickness of the upper and lower aluminum skins is 0.32mm, the internal honeycomb core is a hollow hexagonal prism shape, the height of the honeycomb core is 9.5mm, the side length of the honeycomb core is 6mm, and the wall thickness is 0.05mm.

[0071] The preparation method comprises the following steps:

[0072] (1) laminating the honeycomb panel, the fourth adhesive film layer and the insulating layer at 120° C. for 180 seconds and a pressure of 40 kPa, chamfering and opening holes to obtain a component rear panel;

[0073] (2) Using tempered glass as the support of the module front plate, stacking a weather-resistant transparent film, a first adhesive film layer, a transparent back plate, a second adhesive film layer, a solar cell sheet and a third adhesive film layer in order from bottom to top to obtain a module front plate laminate;

[0074] (3) laminating the front panel laminate and the rear panel of the module at 145° C. for 480 seconds and a pressure of 40 kPa to obtain a composite member, wherein the third adhesive film layer and the insulating layer of the rear panel of the module are placed adjacent to each other;

[0075] (4) Rapidly cooling and laminating the composite member of step (3) to obtain the lightweight photovoltaic module at a cooling and laminating temperature of 30° C. and a cooling and laminating time of 400 s.

[0076] Example 5

[0077] In this embodiment, a lightweight photovoltaic module is provided, which includes a module front plate and a module back plate, the module front plate includes a weather-resistant transparent film, a first adhesive film layer, a transparent back plate, a second adhesive film layer, a solar cell and a third adhesive film layer stacked in sequence, and the module back plate includes an insulating layer, a fourth adhesive film layer and a honeycomb panel stacked in sequence, wherein the third adhesive film layer and the insulating layer are adjacent to each other.

[0078] The material of the weather-resistant transparent film is ETFE with a thickness of 80 μm; the materials of the first film layer, the second film layer, the third film layer and the fourth film layer are all EVA; the weight of the first film layer and the fourth film layer is 200 g / m 2 ; The weight of the second film layer is 460g / m 2 The weight of the third film layer is 480g / m 2 The transparent back panel is made of transparent PET with a thickness of 300μm; the insulating layer is made of PET with a thickness of 240μm; the honeycomb panel is an aluminum honeycomb panel with a weight density of 2.95kg / m 2 The thickness of the upper and lower aluminum skins is 0.32mm, the internal honeycomb core is a hollow hexagonal prism shape, the height of the honeycomb core is 9.5mm, the side length of the honeycomb core is 6mm, and the wall thickness is 0.05mm.

[0079] The preparation method comprises the following steps:

[0080] (1) laminating the honeycomb panel, the fourth adhesive film layer and the insulating layer at 130° C. for 120 seconds and a pressure of 60 kPa, chamfering and opening holes to obtain a component rear panel;

[0081] (2) Using tempered glass as the support of the module front plate, stacking a weather-resistant transparent film, a first adhesive film layer, a transparent back plate, a second adhesive film layer, a solar cell sheet and a third adhesive film layer in order from bottom to top to obtain a module front plate laminate;

[0082] (3) laminating the front panel laminate and the rear panel of the module at 155° C. for 400 seconds and a pressure of 60 kPa to obtain a composite member, wherein the third adhesive film layer and the insulating layer of the rear panel of the module are placed adjacent to each other;

[0083] (4) Rapidly cooling and laminating the composite member of step (3) to obtain the lightweight photovoltaic module at a cooling and laminating temperature of 25° C. and a cooling and laminating time of 450 s.

[0084] Comparative Example 1

[0085] The only difference between this comparative example and Example 1 is that the honeycomb panel is replaced with a tempered glass with a thickness of 3.2 mm, and other conditions are the same as those of Example 1.

[0086] Comparative Example 2

[0087] The only difference between this comparative example and Example 1 is that the honeycomb panel is replaced with a single-layer aluminum sheet with a thickness of 0.15 mm, and other conditions are the same as those of Example 1.

[0088] Comparative Example 3

[0089] The only difference between this comparative example and Example 1 is that the preparation method does not include step (4), that is, in step (3), the lightweight photovoltaic module is directly obtained after the component front plate laminate and the component rear plate are laminated and composited.

[0090] Comparative Example 4

[0091] The only difference between this comparative example and Example 1 is that the temperature of cooling lamination in step (4) of the preparation method is 50°C.

[0092] The photovoltaic modules provided in Examples 1-5 and Comparative Examples 1-4 were subjected to mechanical load tests according to the requirements of IEC61215 10.16.

[0093] The performance test results are shown in Table 1.

[0094] Table 1

[0095]

[0096]

[0097] It can be seen from Table 1 that the rigid lightweight components prepared in Examples 1-5 of the present invention still show excellent appearance and performance even when subjected to a load of 5400Pa (power attenuation: 1.01%-1.62%). Compared with traditional photovoltaic components (Comparative Example 1), the weight of the photovoltaic components of the present invention is greatly reduced, while its load capacity is not reduced. Compared with other types of flexible lightweight components (Comparative Example 2), the load capacity of the photovoltaic components of the present invention is greatly improved, and the component reliability is excellent. However, the appearance of the photovoltaic components prepared in Comparative Examples 3 and 4 are both unqualified. It shows that the photovoltaic components made using the process of the present invention have good load resistance and can effectively ensure the normal operation of the photovoltaic components.

[0098] The applicant declares that the present invention uses the above-mentioned embodiments to illustrate the lightweight photovoltaic module and its preparation method and application, but the present invention is not limited to the above-mentioned embodiments, that is, it does not mean that the present invention must rely on the above-mentioned embodiments to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of the raw materials selected by the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A lightweight photovoltaic module, characterized in that: The lightweight photovoltaic module comprises a module front plate and a module back plate, wherein the module front plate comprises a weather-resistant transparent film, a first adhesive film layer, a transparent back plate, a second adhesive film layer, a solar cell sheet and a third adhesive film layer which are stacked in sequence, and the module back plate comprises an insulating layer, a fourth adhesive film layer and a honeycomb panel which are stacked in sequence, wherein the third adhesive film layer and the insulating layer are adjacently arranged; The method for preparing the lightweight photovoltaic module comprises the following steps: (1) laminating and compounding the honeycomb panel, the fourth adhesive film layer and the insulating layer, and post-processing to obtain a component rear panel; (2) Using tempered glass as the support of the module front plate, stacking a weather-resistant transparent film, a first adhesive film layer, a transparent back plate, a second adhesive film layer, a solar cell sheet and a third adhesive film layer in order from bottom to top to obtain a module front plate laminate; (3) laminating the front panel laminate and the rear panel of the module to obtain a composite member, wherein the third adhesive film layer and the insulating layer of the rear panel of the module are placed adjacent to each other; (4) Rapidly cooling and laminating the composite member of step (3) to obtain the lightweight photovoltaic module.

2. The lightweight photovoltaic module according to claim 1, characterized in that: The material of the weather-resistant transparent film includes PVDF or ETFE.

3. The lightweight photovoltaic module according to claim 1, characterized in that: The thickness of the weather-resistant transparent film is 25-100 μm.

4. The lightweight photovoltaic module according to claim 1, characterized in that: The material of the first adhesive film layer, the second adhesive film layer, the third adhesive film layer and the fourth adhesive film layer independently includes any one of EVA, POE, epoxy resin or acrylic resin.

5. The lightweight photovoltaic module according to claim 1, characterized in that: The gram weight of the first adhesive film layer and the fourth adhesive film layer is independently 180-220 g / m 2 .

6. The lightweight photovoltaic module according to claim 1, characterized in that: The weight of the second adhesive film layer and the third adhesive film layer is independently 400-500 g / m 2 .

7. The lightweight photovoltaic module according to claim 1, characterized in that: The material of the transparent back plate is any one of transparent PET, transparent glass fiber or transparent PC.

8. The lightweight photovoltaic module according to claim 1, characterized in that: The thickness of the transparent back plate is not less than 160 μm.

9. The lightweight photovoltaic module according to claim 8, characterized in that: The thickness of the transparent back plate is 160-600 μm.

10. The lightweight photovoltaic module according to claim 1, characterized in that: The material of the insulating layer includes PET.

11. The lightweight photovoltaic module according to claim 1, characterized in that: The thickness of the insulating layer is not less than 160 μm.

12. The lightweight photovoltaic module according to claim 11, characterized in that: The thickness of the insulating layer is 160-240 μm.

13. The lightweight photovoltaic module according to claim 1, characterized in that: The honeycomb panel includes any one of a metal honeycomb panel, a PP honeycomb panel or a PET honeycomb panel.

14. The lightweight photovoltaic module according to claim 13, characterized in that: The honeycomb panel is an aluminum honeycomb panel.

15. The lightweight photovoltaic module according to claim 13, characterized in that: The thickness of the upper and lower metal plates of the metal honeycomb panel is 0.28-0.34 mm, the internal honeycomb core is in the shape of a hollow hexagonal prism, and the height of the honeycomb core is 9-10 mm.

16. The method for preparing a lightweight photovoltaic module according to any one of claims 1 to 15, characterized in that: The preparation method comprises the following steps: (1) laminating and compounding the honeycomb panel, the fourth adhesive film layer and the insulating layer, and post-processing to obtain a component rear panel; (2) Using tempered glass as the support of the module front plate, stacking a weather-resistant transparent film, a first adhesive film layer, a transparent back plate, a second adhesive film layer, a solar cell sheet and a third adhesive film layer in order from bottom to top to obtain a module front plate laminate; (3) laminating the front panel laminate and the rear panel of the module to obtain a composite member, wherein the third adhesive film layer and the insulating layer of the rear panel of the module are placed adjacent to each other; (4) Rapidly cooling and laminating the composite member of step (3) to obtain the lightweight photovoltaic module.

17. The preparation method according to claim 16, characterized in that: The lamination temperature in step (1) is 115-135° C., and the lamination time is 90-240 seconds.

18. The preparation method according to claim 16, characterized in that: The lamination pressure in step (1) is 20-70 kPa.

19. The preparation method according to claim 16, characterized in that: The post-processing in step (1) includes chamfering and opening holes.

20. The preparation method according to claim 16, characterized in that: The lamination temperature in step (3) is 135-165° C., and the lamination time is 360-510 s.

21. The preparation method according to claim 16, characterized in that: The lamination pressure in step (3) is 20-70 kPa.

22. The preparation method according to claim 16, characterized in that: The temperature of the cooling lamination in step (4) is 10-40°C, and the time of the cooling lamination is 90-510s.

23. Use of the lightweight photovoltaic module according to any one of claims 1 to 15 in roofs or street lamps.

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