Photovoltaic module packaging device and method of manufacturing the same

Abstract

This invention discloses a photovoltaic module packaging device and its preparation method. The packaging box of the photovoltaic module packaging device is made of a composite material, including a biodegradable material and lignocellulose, with a mass ratio of biodegradable material to lignocellulose of 95:5 to 60:40. The photovoltaic module packaging device, made of a composite material including biodegradable material and lignocellulose, exhibits superior mechanical properties. Its impact resistance, abrasion resistance, and deformation resistance are all superior to paper packaging boxes, and it also demonstrates excellent resistance to rainwater erosion. Using this photovoltaic module packaging device for packaging and transporting photovoltaic modules effectively protects them and reduces or avoids damage during transportation.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and in particular to a photovoltaic module packaging device and its preparation method. Background Technology

[0002] In the photovoltaic (PV) module industry, PV modules are mostly transported in packaging boxes. These boxes serve to protect the modules, and their reliability and stability directly affect the safety of the modules and whether they will be damaged during transport. Currently, the most common packaging boxes are paper boxes, which are made of cardboard. Paper boxes are easily deformed under external impact, which can severely damage the PV modules inside. Furthermore, paper boxes are easily damaged and deformed in rainy or humid environments, affecting transportation and potentially damaging the PV modules in severe cases. Summary of the Invention

[0003] Therefore, addressing the problems of traditional photovoltaic module transportation where paper packaging boxes are easily deformed under external impact, potentially damaging the photovoltaic modules inside, and the susceptibility of paper packaging boxes to damage and deformation in rainy or humid environments, affecting transportation and even damaging the photovoltaic modules, it is necessary to provide a photovoltaic module packaging device. The photovoltaic module packaging device of this invention exhibits good impact resistance, wear resistance, and deformation resistance. Using this packaging device to package photovoltaic modules ensures better safety during transportation.

[0004] One embodiment of this application provides a photovoltaic module packaging device.

[0005] A photovoltaic module packaging device includes a packaging box made of a composite material, the composite material comprising a biodegradable material and lignocellulose, wherein the mass ratio of the biodegradable material to the lignocellulose in the composite material is 95:5 to 60:40.

[0006] In some embodiments, the packaging box includes a first cover, a second cover, and a box body. The box body has a first opening and a second opening. The first cover is used to cover the first opening to open or close the first opening, and the second cover is used to cover the second opening to open or close the second opening.

[0007] In some embodiments, the box body is a hollow columnar structure with openings at both ends, and the two ends of the box body respectively form the first opening and the second opening.

[0008] In some embodiments, the photovoltaic module packaging device further includes corner protectors disposed inside the packaging box, and the corner protectors are provided at at least one corner inside the packaging box, the corner protectors being made of the composite material.

[0009] In some embodiments, the photovoltaic module packaging device further includes a buffer layer, and at least a portion of the packaging box has a double-layer hollow structure, the double-layer hollow structure being filled with the buffer layer, the buffer layer being made of a foamed material, the foamed material being the composite material formed by foaming treatment.

[0010] In some embodiments, the biodegradable material includes one or more of polylactic acid, polybutylene terephthalate, polyhydroxyalkanoate, polycaprolactone, and polybutylene succinate.

[0011] In some embodiments, the lignocellulose includes one or more of corn cob powder, sisal fiber, sugar palm fiber, pine fiber, and rubberwood powder.

[0012] An embodiment of this application also provides a method for preparing a photovoltaic module packaging device.

[0013] A method for preparing a photovoltaic module packaging device includes the following steps:

[0014] A composite material is prepared using biodegradable materials and lignocellulose, wherein the mass ratio of the biodegradable materials to the lignocellulose in the composite material is 95:5 to 60:40.

[0015] The packaging box body is prepared using the aforementioned composite material.

[0016] In some embodiments, the method for preparing the composite material includes the following steps:

[0017] Modification treatment of biodegradable materials;

[0018] Lignocellulose was subjected to alkali solution treatment and sodium hypochlorite aqueous solution treatment in sequence, and silane coupling agent was added to the treated lignocellulose for modification treatment.

[0019] The modified biodegradable material and the modified lignocellulose were extruded and granulated to obtain the composite material.

[0020] In some embodiments, the process of sequentially treating lignocellulose with an alkaline solution and then with a sodium hypochlorite aqueous solution specifically includes the following steps:

[0021] Pretreatment of lignocellulose: Soak and stir the lignocellulose in an alkaline solution for no less than 3 hours. The mass concentration of the alkaline solution is 5% to 30%. Add an equal amount of sodium hypochlorite aqueous solution to the alkaline solution and allow it to react fully. Then wash the lignocellulose with deionized water until it is neutral.

[0022] In some embodiments, the modifier used to modify the biodegradable material includes one or more of pyromellitic anhydride, pyromellitic acid, trimellitic anhydride, trimellitic acid, naphthalenetetracarboxylic anhydride, naphthalenetetracarboxylic acid, cyclopentanetetracarboxylic dianhydride, and cyclopentanetetracarboxylic acid.

[0023] In some embodiments, the modification treatment of biodegradable materials specifically includes the following steps:

[0024] After mixing the biodegradable material in an open two-roll mill for at least 2 minutes, add the modifier. The molar mass ratio of the biodegradable material to the modifier is 1:1 to 1:4. After mixing for at least 1 minute, add 1% to 5% by mass of antioxidant. After mixing for at least 1 minute, add 1% to 15% by mass of silane coupling agent. React for 10 to 15 minutes.

[0025] In some embodiments, when the treated lignocellulose is modified by adding a silane coupling agent, the silane coupling agent includes one or more of KH550, KH560 and KH570.

[0026] In some embodiments, the composite material is further subjected to a flat vulcanization treatment at a temperature of 180°C to 200°C and a pressure of 15MPa to 20MPa.

[0027] In some embodiments, extrusion granulation is performed by granulation in an extruder, with the temperature controlled between 170°C and 190°C during extrusion granulation.

[0028] In some embodiments, the method for preparing the photovoltaic module packaging device further includes the following step: performing performance testing on the prepared composite material.

[0029] In some embodiments, the performance testing includes testing dumbbell-shaped tensile test samples made from the composite material and testing rectangular impact test samples made from the composite material.

[0030] The packaging box of the aforementioned photovoltaic module packaging device is made of composite materials, including biodegradable materials and lignocellulose. The packaging box made of composite materials has excellent mechanical properties, and its impact resistance, wear resistance, and deformation resistance are all superior to those of paper packaging boxes. In addition, the packaging box has a strong resistance to rainwater erosion. Using the aforementioned photovoltaic module packaging device for packaging and transporting photovoltaic modules can effectively protect the photovoltaic modules and reduce or avoid damage to the photovoltaic modules during transportation.

[0031] The aforementioned photovoltaic module packaging device further reinforces the packaging box by setting corner protection components, thereby improving the impact resistance of the packaging box. In particular, setting corner protection components at the internal corners of the packaging box can increase the packaging box's resistance to external squeezing and impact. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0034] Figure 1 This is a schematic diagram of a photovoltaic module packaging device according to an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the corner protector component of a photovoltaic module packaging device according to an embodiment of the present invention;

[0036] Figure 3 for Figure 2 The diagram shows an enlarged view of a portion of the corner protector assembly.

[0037] Explanation of reference numerals in the attached figures

[0038] 10. Photovoltaic module packaging device; 100. Packaging box; 101. First cover; 102. Second cover; 103. Box body; 200. Corner protector. Detailed Implementation

[0039] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0045] This application provides a photovoltaic module packaging device to address the problems in the photovoltaic field, such as the easy deformation of paper packaging boxes used during the transportation of photovoltaic modules under external impact, which can severely damage the photovoltaic modules inside the packaging; and the easy damage and deformation of paper packaging boxes in rainy or humid environments, affecting transportation and potentially damaging the photovoltaic modules. The photovoltaic module packaging device will be described below with reference to the accompanying drawings.

[0046] The photovoltaic module packaging device provided in this application embodiment is exemplary; please refer to [link to example]. Figure 1 As shown, Figure 1 This is a schematic diagram of a photovoltaic module packaging device provided in an embodiment of this application. The photovoltaic module packaging device of this application can be used for photovoltaic module packaging and transportation.

[0047] To more clearly illustrate the structure of the photovoltaic module packaging device, the following description, in conjunction with the accompanying drawings, will be provided.

[0048] For example, please refer to Figure 1 As shown, a photovoltaic module packaging device 10 includes a packaging box 100. The packaging box 100 is made of a composite material. The composite material includes a biodegradable material and lignocellulose. The mass ratio of the biodegradable material to lignocellulose in the composite material is 95:5 to 60:40.

[0049] In some embodiments, the packaging box 100 is made of a composite board obtained from composite materials. The packaging box 100 can be made from a single composite board or from multiple composite boards joined together.

[0050] In some of these embodiments, please refer to Figure 1As shown, the packaging box 100 includes a first cover 101, a second cover 102, and a box body 103. The box body 103 has a first opening and a second opening. The first cover 101 is used to cover the first opening to open or close the first opening, and the second cover 102 is used to cover the second opening to open or close the second opening.

[0051] In some embodiments, the housing 103 is a hollow cylindrical structure with openings at both ends. A first opening and a second opening are formed at each end of the housing 103.

[0052] In some embodiments, the box body 103 can be a hollow polygonal prism structure open at both ends, a hollow cylindrical structure open at both ends, or a hollow elliptical prism structure open at both ends. For example, the box body 103 can be a hollow quadrangular structure open at both ends, a hollow triangular prism structure open at both ends, or a hollow cylindrical structure open at both ends, etc. Preferably, the box body 103 can be a hollow quadrangular structure open at both ends. The length, width, and height of the box body 103 can be set according to actual needs.

[0053] In some of these embodiments, please refer to Figure 2 As shown, Figure 2 This is a schematic diagram of the corner protector assembly 200 of a photovoltaic module packaging device 10 provided in an embodiment of this application. The photovoltaic module packaging device 10 also includes the corner protector assembly 200. The corner protector assembly 200 is disposed inside the packaging box 100, and is provided at at least one corner inside the packaging box 100. The corner protector assembly 200 is made of composite material. The photovoltaic module packaging device 10 further reinforces the packaging box 100 by providing the corner protector assembly 200, thereby improving the impact resistance of the packaging box 100. In particular, the corner protector assembly 200 is provided at the internal corners inside the packaging box 100, which can increase the packaging box 100's resistance to external squeezing, impact, etc.

[0054] In some of these embodiments, please refer to Figure 3 As shown, Figure 3 This is a partial enlarged schematic diagram of the corner protector component 200 of the photovoltaic module packaging device 10 provided in an embodiment of this application. The corner protector component 200 has a three-dimensional honeycomb structure.

[0055] In some embodiments, the photovoltaic module packaging device 10 further includes a cushioning layer. At least a portion of the packaging box 100 has a double-layered hollow structure, with a cushioning layer filling the hollow structure. The cushioning layer is made of a foamed material, wherein the foamed material is a composite material formed through a foaming process. The cushioning layer enhances the strength of the packaging box 100 and improves its impact resistance.

[0056] In some embodiments, the first cover 101, the second cover 102, the body 103, and the corner protector assembly 200 of the packaging box 100 all have a double-layer hollow structure. The first cover 101, the second cover 102, the body 103, and the corner protector assembly 200 are all filled with a cushioning layer. Preferably, the corner protector assembly 200 has a three-dimensional honeycomb structure, with the three-dimensional honeycomb filled with a cushioning layer.

[0057] In some embodiments, the biodegradable material includes one or more of polylactic acid (PLA), polybutylene terephthalate (PBAT), polyhydroxyalkanoate (PHA), polycaprolactone (PCL), and polybutylene succinate (PBS).

[0058] In some embodiments, the lignocellulose includes one or more of corn cob powder, sisal fiber, sugar palm fiber, pine fiber, and rubberwood powder.

[0059] An embodiment of this application also provides a method for preparing a photovoltaic module packaging device 10.

[0060] A method for preparing a photovoltaic module packaging device 10 includes the following steps:

[0061] A composite material was prepared using biodegradable materials and lignocellulose, with a mass ratio of biodegradable materials to lignocellulose of 95:5 to 60:40.

[0062] The packaging box 100 is made of composite materials.

[0063] In some embodiments, the mass ratio of biodegradable material to lignocellulose in the composite material can be 95:5, 80:20, 70:30, or 60:40, etc.

[0064] In some embodiments, the method for preparing the composite material includes the following steps:

[0065] Modification treatment of biodegradable materials;

[0066] The lignocellulose was sequentially treated with an alkaline solution (e.g., NaOH solution, KOH solution, etc.) and a sodium hypochlorite aqueous solution. A silane coupling agent was then added to the treated lignocellulose for modification. The sodium hypochlorite aqueous solution was a mixture of sodium hypochlorite and sodium hydroxide in a mass ratio of 1:1.

[0067] The modified biodegradable material and the modified lignocellulose were extruded and granulated to obtain a composite material.

[0068] In some embodiments, the process of sequentially treating lignocellulose with an alkaline solution and then with a sodium hypochlorite aqueous solution specifically includes the following steps:

[0069] Pretreatment of lignocellulose: Soak and stir the lignocellulose in an alkaline solution (e.g., NaOH solution) for no less than 3 hours. The mass concentration of the alkaline solution is 5% to 30%. Add an equal amount of sodium hypochlorite aqueous solution to the alkaline solution and allow it to react fully. Then wash the lignocellulose with deionized water until it is neutral.

[0070] In some embodiments, the modifiers used to modify the biodegradable material include one or more of pyromellitic anhydride (PMDA), pyromellitic acid (PMA), trimellitic anhydride, trimellitic acid, naphthalenetetracarboxylic anhydride, naphthalenetetracarboxylic acid, cyclopentanetetracarboxylic dianhydride, and cyclopentanetetracarboxylic acid.

[0071] In some embodiments, the modification treatment of biodegradable materials specifically includes the following steps:

[0072] After accurately weighing a predetermined amount of biodegradable material and mixing it in an open two-roll mill for at least 2 minutes, add a modifier (PMDA). The molar ratio of biodegradable material to modifier is 1:1 to 1:4. After mixing for at least 1 minute, add 1% to 5% by mass of antioxidant (1010). After mixing for at least 1 minute, add 1% to 15% by mass of silane coupling agent (KH550) and react for 10 to 15 minutes.

[0073] In some embodiments, when the treated lignocellulose is modified by adding a silane coupling agent, the silane coupling agent includes one or more of KH550, KH560 and KH570.

[0074] In some embodiments, the composite material is further subjected to a flat vulcanization treatment at a temperature of 180°C to 200°C and a pressure of 15MPa to 20MPa.

[0075] In some embodiments, extrusion granulation is performed by granulation in an extruder, with the temperature controlled between 170°C and 190°C during extrusion granulation.

[0076] In some embodiments, the method for preparing the photovoltaic module packaging device 10 further includes the following step: performing performance testing on the prepared composite material.

[0077] In some embodiments, performance testing includes testing dumbbell-shaped tensile test samples made from the composite material and testing rectangular impact test samples made from the composite material.

[0078] Example 1

[0079] This embodiment provides a photovoltaic module packaging device 10.

[0080] The photovoltaic module packaging device 10 of this embodiment is prepared by the following steps:

[0081] Step 1: Pretreatment of lignocellulose: Soak lignocellulose corn cob powder in NaOH solution, stirring continuously for 3 hours. Add an alkaline solution with a NaOH mass concentration of 10%, and add an equal amount of sodium hypochlorite aqueous solution to allow for full reaction. Then wash the lignocellulose with deionized water until neutral.

[0082] Step 2: Modify the biodegradable material: Accurately weigh a predetermined amount of the biodegradable material polylactic acid (PLA) and mix it in an open two-roll mill for 2 minutes. Then add the modifier pyromellitic anhydride (PMDA). The molar mass ratio of the biodegradable material to the modifier is 1:1. After mixing for 1 minute, add 1% by mass of antioxidant 1010 and mix for 1 minute. Then add 1% by mass of silane coupling agent KH550 and react for 10 minutes.

[0083] Step 3: The modified biodegradable material with a molar mass ratio of 1:1 and the modified lignocellulose are placed in an extruder for extrusion granulation. The temperature during extrusion granulation is controlled at 180℃ to obtain the composite material.

[0084] Step 4: The composite material is subjected to flat vulcanization treatment at a temperature of 180℃ and a pressure of 15MPa.

[0085] Step 5: Perform performance tests on the composite material after flat vulcanization. Dumbbell-shaped tensile test samples and rectangular impact test samples were prepared from the composite material for testing. The tensile strength of the prepared composite material samples was measured to be 68.3 MPa, and the impact strength was 28.7 MPa.

[0086] Step 6: Perform foaming treatment on the composite material prepared in step 4 to obtain foamed material for later use.

[0087] Step 7: Using the composite material prepared in Step 4, prepare the first cover 101, the second cover 102, and the hollow columnar box body 103 with openings at both ends. The box body 103 can be a right-angled quadrangular prism. The first cover 101, the second cover 102, and the box body 103 constitute the packaging box 100. Preferably, the box body 103 can be formed by splicing together four composite panels prepared from the composite material, or it can be formed by bending a single composite panel multiple times and then connecting them. The first cover 101 and the second cover 102 can each be formed by bending a single composite panel.

[0088] Step 8: Using the composite material prepared in Step 4, corner protector components 200 are prepared. Corner protector components 200 have a straight quadrangular structure and can be honeycomb-shaped. The corner protector components 200 are connected to the four corners inside the box body 103. The first cover 101 and the second cover 102 can respectively cover the two openings of the box body 103. Preferably, the first cover 101, the second cover 102, and the box body 103 can be a double-layer hollow structure. The double-layer hollow structure and the honeycomb structure of the corner protector components 200 are respectively filled with the buffer layer prepared by the foaming treatment in Step 6, resulting in the photovoltaic module packaging device 10. The compressive strength of the photovoltaic module packaging device 10 prepared from a composite material made of ordinary corrugated cardboard boxes and biodegradable materials and wood fibers in the conventional technology was tested under different humidity levels, as shown in Table 1 below. Table 1 shows that under different humidity conditions, the compressive strength of the photovoltaic module packaging device 10 in this embodiment is significantly better than that of ordinary corrugated cardboard boxes in the conventional technology.

[0089] Table 1

[0090]

[0091] Example 2

[0092] This embodiment provides a photovoltaic module packaging device 10.

[0093] The photovoltaic module packaging device 10 of this embodiment is prepared by the following steps:

[0094] Step 1: Pretreatment of lignocellulose: Soak pine lignocellulose in KOH solution with constant stirring for 6 hours. The concentration of KOH solution added is 5%. Add an equal amount of sodium hypochlorite aqueous solution to allow for full reaction. Then wash the lignocellulose with deionized water until neutral.

[0095] Step 2: Modify the biodegradable material: Accurately weigh a predetermined amount of the biodegradable material, polybutylene terephthalate (PBAT), and mix it in an open two-roll mill for 2 minutes. Then, add the modifier, pyromellitic anhydride (PMDA), with a molar mass ratio of biodegradable material to modifier of 1:2. After mixing for 1 minute, add 1% by mass of antioxidant 1010 and mix for 1 minute. Then, add 1% by mass of silane coupling agent KH550 and react for 10 minutes.

[0096] Step 3: The modified biodegradable material with a molar mass ratio of 1:2 and the modified lignocellulose are placed in an extruder for extrusion granulation. The temperature during extrusion granulation is controlled at 180℃ to obtain the composite material.

[0097] Step 4: The composite material is subjected to flat vulcanization treatment at a temperature of 180℃ and a pressure of 15MPa.

[0098] Step 5: Perform performance tests on the composite material after flat vulcanization treatment. Dumbbell-shaped tensile test samples and rectangular impact test samples were prepared from the composite material for testing. The tensile strength of the prepared composite material samples was measured to be 73.5 MPa, and the impact strength was 32.6 MPa.

[0099] Step 6: Perform foaming treatment on the composite material prepared in step 4 to obtain foamed material for later use.

[0100] Step 7: Using the composite material prepared in Step 4, prepare the first cover 101, the second cover 102, and the hollow columnar box body 103 with openings at both ends. The box body 103 can be a right-angled quadrangular prism. The first cover 101, the second cover 102, and the box body 103 constitute the packaging box 100. Preferably, the box body 103 can be formed by splicing together four composite panels prepared from the composite material, or it can be formed by bending a single composite panel multiple times and then connecting them. The first cover 101 and the second cover 102 can each be formed by bending a single composite panel.

[0101] Step 8: Using the composite material prepared in Step 4, corner protector components 200 are prepared. Corner protector components 200 have a straight quadrangular structure and can be honeycomb-shaped. The corner protector components 200 are connected to the four corners inside the box body 103. The first cover 101 and the second cover 102 can respectively cover the two openings of the box body 103. Preferably, the first cover 101, the second cover 102, and the box body 103 can be a double-layer hollow structure. The double-layer hollow structure and the honeycomb structure of the corner protector components 200 are respectively filled with the buffer layer prepared by the foaming treatment in Step 6, resulting in the photovoltaic module packaging device 10. The compressive strength of the photovoltaic module packaging device 10 prepared from a conventional corrugated cardboard box and a composite material made of biodegradable materials and wood fibers was tested under different humidity levels, as shown in Table 2 below. Table 2 shows that under different humidity conditions, the compressive strength of the photovoltaic module packaging device 10 in this embodiment is significantly better than that of a conventional corrugated cardboard box.

[0102] Table 2

[0103]

[0104] In summary, the packaging box 100 of the photovoltaic module packaging device 10 is made of composite materials, including biodegradable materials and lignocellulose. The packaging box 100 made of composite materials has excellent mechanical properties. The impact resistance, wear resistance and deformation resistance of the packaging box 100 are all superior to those of paper packaging boxes. In addition, the packaging box 100 has better resistance to rainwater erosion. Using the photovoltaic module packaging device 10 to package and transport photovoltaic modules can effectively protect the photovoltaic modules and reduce or avoid damage to the photovoltaic modules during transportation.

[0105] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0106] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0107] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A photovoltaic module packaging device (10), characterized in that, The product includes a packaging box (100) made of a composite material, which includes a biodegradable material and lignocellulose. The mass ratio of the biodegradable material to the lignocellulose in the composite material is 95:5 to 60:

40. The biodegradable material is modified as follows: the biodegradable material is mixed in an open double-roll mill for at least 2 minutes, and then a modifier is added. The molar mass ratio of the biodegradable material to the modifier is 1:1 to 1:

4. After mixing for at least 1 minute, 1% to 5% by mass of an antioxidant is added. After mixing for at least 1 minute, 1% to 15% by mass of a silane coupling agent is added, and the mixture is reacted for 10 to 15 minutes. The lignocellulose is treated as follows: the lignocellulose is soaked and stirred in an alkaline solution with a mass concentration of 5% to 30% for at least 3 hours. An equal amount of sodium hypochlorite aqueous solution is added to the alkaline solution for a full reaction. The lignocellulose is then washed with deionized water until it is neutral.

2. The photovoltaic module packaging device (10) according to claim 1, characterized in that, The packaging box (100) includes a first cover (101), a second cover (102), and a box body (103). The box body (103) has a first opening and a second opening. The first cover (101) is used to cover the first opening to open or close the first opening, and the second cover (102) is used to cover the second opening to open or close the second opening.

3. The photovoltaic module packaging device (10) according to claim 2, characterized in that, The box body (103) is a hollow columnar structure with openings at both ends, and the first opening and the second opening are formed at the two ends of the box body (103).

4. The photovoltaic module packaging device (10) according to any one of claims 1 to 3, characterized in that, The photovoltaic module packaging device (10) further includes a corner protector (200), which is disposed inside the packaging box (100) and is provided at at least one corner inside the packaging box (100). The corner protector (200) is made of the composite material.

5. The photovoltaic module packaging device (10) according to any one of claims 1 to 3, characterized in that, The photovoltaic module packaging device (10) further includes a buffer layer. At least a portion of the packaging box (100) has a double-layer hollow structure. The buffer layer is filled inside the double-layer hollow structure. The buffer layer is made of foamed material, which is formed by foaming the composite material.

6. The photovoltaic module packaging device (10) according to any one of claims 1 to 3, characterized in that, The biodegradable material includes one or more of polylactic acid, polybutylene terephthalate, polyhydroxyalkanoate, polycaprolactone, and polybutylene succinate.

7. The photovoltaic module packaging device (10) according to any one of claims 1 to 3, characterized in that, The lignocellulose includes one or more of corn cob powder, sisal fiber, sugar palm fiber, pine fiber, and rubberwood powder.

8. A method for preparing a photovoltaic module packaging device (10), characterized in that, Includes the following steps: To modify biodegradable materials, the biodegradable materials are placed in an open two-roll mill and mixed for at least 2 minutes. Then, a modifier is added. The molar mass ratio of the biodegradable materials to the modifier is 1:1 to 1:

4. After mixing for at least 1 minute, 1% to 5% by mass of an antioxidant is added. After mixing for at least 1 minute, 1% to 15% by mass of a silane coupling agent is added. The reaction is carried out for 10 to 15 minutes. The lignocellulose is soaked and stirred in an alkaline solution for no less than 3 hours. The mass concentration of the alkaline solution is 5% to 30%. An equal amount of sodium hypochlorite aqueous solution is added to the alkaline solution to allow for a full reaction. The lignocellulose is then washed with deionized water until it is neutral. A silane coupling agent is added to the treated lignocellulose for modification. The modified biodegradable material and the modified lignocellulose are extruded and granulated to obtain a composite material, wherein the mass ratio of the biodegradable material to the lignocellulose in the composite material is 95:5~60:

40. A photovoltaic module packaging device (10) including a packaging box (100) is prepared using the composite material.

9. The method for preparing the photovoltaic module packaging device (10) according to claim 8, characterized in that, Modifiers used in modifying biodegradable materials include one or more of the following: pyromellitic anhydride, pyromellitic acid, trimellitic anhydride, trimellitic acid, naphthalene tetracarboxylic anhydride, naphthalene tetracarboxylic acid, cyclopentanetetracarboxylic dianhydride, and cyclopentanetetracarboxylic acid.

10. The method for preparing the photovoltaic module packaging device (10) according to any one of claims 8 to 9, characterized in that, When silane coupling agents are added to the treated lignocellulose for modification, the silane coupling agents include one or more of KH550, KH560 and KH570.

11. The method for preparing the photovoltaic module packaging device (10) according to any one of claims 8 to 9, characterized in that, The composite material is also subjected to a flat vulcanization treatment at a temperature of 180℃ to 200℃ and a pressure of 15MPa to 20MPa.

12. The method for preparing the photovoltaic module packaging device (10) according to any one of claims 8 to 9, characterized in that, Extrusion granulation involves granulating the material in an extruder, with the temperature controlled between 170℃ and 190℃.

13. The method for preparing the photovoltaic module packaging device (10) according to any one of claims 8 to 9, characterized in that, The process also includes the following steps: performing performance tests on the prepared composite material.

14. The method for preparing the photovoltaic module packaging device (10) according to claim 13, characterized in that, The performance tests include testing dumbbell-shaped tensile test samples made from the composite material and testing rectangular impact test samples made from the composite material.

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