Glass type crystalline silicon semi-flexible photovoltaic module

Abstract

The utility model belongs to the technical field of photovoltaic modules, and discloses a glass type crystalline silicon semi-flexible photovoltaic module, which comprises a laminated module, and the laminated module sequentially comprises a photovoltaic toughened glass layer, a first adhesive film packaging layer, a battery piece, a second adhesive film packaging layer and a back plate layer from top to bottom. The edge of the peripheral outer wall of the laminated assembly is coated with an aluminum profile frame; a junction box is arranged on one side of the back face of the laminated assembly and electrically connected with the battery pieces. According to the utility model, the back plate layer adopts the composite flame-retardant reinforced back plate and is combined with the photovoltaic toughened glass layer, so that the solar cell can be protected, the CLASS C flame-retardant grade is met, and the defect that the original flexible assembly is not easy to resist flame is overcome; according to the semi-flexible photovoltaic module, the back plate layer adopts the epoxy resin plate, so that the semi-flexible photovoltaic module does not become yellow, and the epoxy resin plate can play a role in reinforcing the back plate layer, so that the battery piece is not easy to crack and break, and the situation of large attenuation of the semi-flexible photovoltaic module is not caused.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic module technology, and in particular to a glass-type crystalline silicon semi-flexible photovoltaic module. Background Technology

[0002] Flexible solar modules are environmentally friendly charging devices that utilize solar energy to charge internal electrical equipment in solar houses, solar boats, solar RVs, solar tents, solar parking lots, solar streetlights, and distributed photovoltaic power stations. The power generation of flexible modules involves converting solar energy into electrical energy. External leads from the junction box of the flexible solar module can be connected to electrical equipment for charging. This can compensate for the energy loss in automotive lead-acid batteries, preventing them from being completely depleted due to their self-discharge characteristics, thus extending battery life. They can also be connected to photovoltaic inverters and fed into the grid via photovoltaic cables. Currently, the flexible solar modules on the market are mainly PET or ETFE flexible solar modules, and most use Sunpower or DF flexible solar cells.

[0003] With the development of new energy technologies, PET or ETFE flexible solar modules are increasingly widely used in electrical equipment. However, existing flexible solar modules are mainly laminates composed of PET composite film or ETFE film and back film encapsulation, which have the following defects when used: the charging effect of flexible modules is not good enough, the efficiency is low, and the attenuation is large; the materials used in flexible modules, such as the back film, cannot meet the flame retardant requirements of photovoltaic modules; the durability of flexible modules on the market is poor, and the materials will yellow after long-term use in sunlight; the appearance of PET-encapsulated flexible solar modules is relatively rigid, which has a certain impact on users. Moreover, the shape and appearance of flexible solar module devices on the market are relatively simple, with limited choices, and they are increasingly unable to meet the demanding requirements of market customers. Summary of the Invention

[0004] To overcome the technical defects of the existing technology, this utility model provides a glass-type crystalline silicon semi-flexible photovoltaic module.

[0005] The technical solution adopted in this utility model is: a glass-type crystalline silicon semi-flexible photovoltaic module, including a laminated module, wherein the laminated module comprises, from top to bottom, a photovoltaic tempered glass layer, a first encapsulating film layer, a solar cell, a second encapsulating film layer, and a backsheet layer; a junction box is provided on one side of the back of the laminated module, and the junction box is electrically connected to the solar cell; the backsheet layer is any one of an epoxy resin board or a composite flame-retardant reinforced backsheet; the laminated module is flexible, with a maximum bending angle of 30° to 45°.

[0006] Preferably, the thickness of the photovoltaic tempered glass layer is set to 1.1 mm to 2.5 mm.

[0007] Preferably, both the first and second encapsulation layers are made of EVA film or POE film.

[0008] Preferably, the solar cell is any one of N-type monocrystalline TOPCon cells, HJT cells, or BC cells.

[0009] Preferably, the junction box is a waterproof and UV-resistant junction box, and the junction box is provided with a positive terminal and a negative terminal.

[0010] Preferably, the junction box has a built-in anti-reverse charging diode, which is electrically connected to the battery cell.

[0011] Preferably, the outer edges of the laminated assembly are covered with an aluminum profile frame.

[0012] Preferably, the aluminum profile frame includes a frame surrounding the laminated assembly, with adjacent frames connected by corner brackets.

[0013] Preferably, the aluminum profile frame is provided with mounting holes for various installation angles.

[0014] The beneficial effects of this utility model are:

[0015] 1. The semi-flexible module encapsulated by the photovoltaic tempered glass layer and the backsheet layer makes the solar panel more robust and less prone to scratches and damage. The laminated module is flexible, with a maximum bending angle of 30° to 45°. This improves the shortcomings of the original ordinary glass module, which cannot be bent or folded, and avoids the situation where the flexible solar modules on the market have a single shape and appearance, limited choices, and cannot meet the needs of market customers.

[0016] 2. By using a composite flame-retardant reinforced backsheet layer combined with a photovoltaic tempered glass layer, the solar cells can be protected, meeting the CLASS C flame-retardant rating and improving the shortcomings of the original flexible modules that are not easy to flame-retard. The backsheet layer uses an epoxy resin board, which prevents the semi-flexible photovoltaic module from yellowing, and the epoxy resin board can also strengthen the backsheet layer, making the cells less prone to microcracks and breakage, and preventing the semi-flexible photovoltaic module from having large degradation.

[0017] 3. The photovoltaic tempered glass layer and backsheet layer, combined with N-type monocrystalline TOPCon cells, HJT cells or BC cells, improve the power generation efficiency and durability of the semi-flexible photovoltaic module. Attached Figure Description

[0018] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0019] Figure 1 This is a schematic diagram of the exploded structure of the glass-type crystalline silicon semi-flexible photovoltaic module of this utility model;

[0020] Figure 2 This is a schematic diagram of the glass-type crystalline silicon semi-flexible photovoltaic module of this utility model.

[0021] Explanation of reference numerals in the attached figures: 1. Laminated module; 2. Photovoltaic tempered glass layer; 3. First encapsulation layer; 4. Solar cell; 5. Second encapsulation layer; 6. Backsheet layer; 7. Aluminum profile frame; 701. Frame; 702. Corner bracket; 703. Mounting hole; 8. Junction box; 801. Positive terminal; 802. Negative terminal. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0023] like Figure 1 and Figure 2As shown, this embodiment provides a glass-type crystalline silicon semi-flexible photovoltaic module, including a laminated module 1. The laminated module 1, from top to bottom, includes a photovoltaic tempered glass layer 2, a first encapsulating film layer 3, a solar cell 4, a second encapsulating film layer 5, and a backsheet layer 6. The photovoltaic tempered glass layer 2 is ultra-white rolled tempered glass made of low-iron glass, and its surface is coated with an anti-reflective film to increase light transmittance and durability. The photovoltaic tempered glass layer 2, solar cell 4, and backsheet layer 6 are encapsulated by the first encapsulating film layer 3 and the second encapsulating film layer 5 using a lamination process. A junction box 8 is provided on one side of the back of the laminated module 1. The junction box 8 is electrically connected to the solar cell 4. The external leads from the junction box 8 can be used to charge electronic products that meet the output voltage and current requirements, facilitating installation and use. It is suitable for emergency power supply in solar houses, solar boats, solar RVs, solar tents, solar parking lots, energy storage power boxes, etc., eliminating the need for an internal combustion engine for energy conversion and reducing the use of rare energy resources. The solar panel is encapsulated by a semi-flexible module consisting of a photovoltaic tempered glass layer 2 and a backsheet layer 6. The photovoltaic tempered glass layer 2 is 1.1mm to 2.5mm thick, making it ultra-thin. The laminated module 1 is flexible, with a maximum bending angle of 30° to 45°, making the solar panel more robust and less prone to scratches and damage, thus overcoming the shortcomings of traditional ordinary glass modules that cannot be bent or folded. The backsheet layer 6 uses a composite flame-retardant reinforced backsheet, which is a multi-layer composite structure including at least one flame-retardant polymer base layer (such as flame-retardant modified PET or a flame-retardant polymer base layer), one fluoropolymer weather-resistant layer, and one adhesive layer. It is formed through a composite process and combined with the photovoltaic tempered glass layer 2 to protect the solar cells 4. Then, it is encapsulated using a first encapsulation layer 3 and a second encapsulation layer 5 through a lamination process, making the solar panel more robust and less prone to delamination over long-term use, while also meeting CLASS requirements. The C flame retardant rating improves upon the shortcomings of the original flexible modules, which are prone to delamination and are not easy to flame retard. The backsheet layer 6 is made of epoxy resin, which prevents the semi-flexible photovoltaic module from yellowing. The epoxy resin can also strengthen the backsheet layer 6, making the cells 4 less prone to microcracks and breakage, and preventing the semi-flexible photovoltaic module from experiencing large degradation.

[0024] The first encapsulation layer 3 and the second encapsulation layer 5 are both made of EVA film or POE film, and retain a certain elasticity after lamination.

[0025] The solar cell 4 is any one of N-type monocrystalline TOPCon cells, HJT cells, or BC cells, which improves the power generation efficiency and durability of the semi-flexible photovoltaic module.

[0026] The junction box 8 is a waterproof and UV-resistant junction box (the shell of the waterproof and UV-resistant junction box is made of UV-resistant modified engineering plastic, which is made by uniformly adding ultraviolet absorber (UVA) and hindered amine light stabilizer to the base resin (such as PPA). The junction box 8 is equipped with a positive terminal 801 and a negative terminal 802, which improves the defects of the original junction box 8 that is not waterproof and is easy to weather.

[0027] The junction box 8 has a built-in anti-reverse charging diode (not shown in the figure). The anti-reverse charging diode is electrically connected to the battery cell 4 to prevent reverse charging. This improves upon the defect of the original flexible component junction box 8, which was prone to reverse charging and causing the component to burn out during use, and ensures the safety of the product.

[0028] The outer edges of the laminated component 1 are covered with an aluminum profile frame 7. The aluminum profile frame 7 includes a frame 701 around the laminated component 1. Two adjacent frames 701 are connected by a corner bracket 702. The inner side of the frame 701 is provided with a groove to cover the laminated component 1. The end of the frame 701 is provided with a connecting groove that matches the corner bracket 702. The aluminum profile frame 7 is provided with mounting holes 703 for various installation angles. Each frame 701 is provided with multiple mounting holes 703, which makes the semi-flexible photovoltaic module have multiple installation and usage methods, solving the defect of the single installation method of the original flexible module.

[0029] Further improvements have been made to the aluminum profile frame 7. The two opposing frames 701 of the aluminum profile frame 7 can be pre-made with multiple bending angles according to actual use, so that they can be adapted to laminated components 1 with different bending angles.

[0030] When in operation, under sufficient sunlight, the semi-flexible photovoltaic module generates current and voltage. These currents are directly charged via external leads from the junction box 8 of the semi-flexible photovoltaic module, allowing for convenient installation and use. It is suitable for emergency power needs in solar houses, solar boats, solar RVs, solar tents, solar parking lots, and energy storage power boxes, eliminating the need for an internal combustion engine for energy conversion and reducing the consumption of this rare energy source. The semi-flexible module, encapsulated by the photovoltaic tempered glass layer 2 and the backsheet layer 6, allows the laminated module 1 to be bent. The maximum angle is 30° to 45°. For example, a 2m long semi-flexible photovoltaic module has a chord length of 950mm and an arc radius of 2m after bending, making the solar panel more robust and less prone to scratches and damage, thus improving the shortcomings of the original ordinary glass modules that cannot be bent and folded. The backsheet layer 6 adopts a composite flame-retardant reinforced backsheet, which is combined with the photovoltaic tempered glass layer 2 to protect the solar cells 4. Then, it is encapsulated by the first encapsulation layer 3 and the second encapsulation layer 5 using a lamination process, making the solar panel more robust and less prone to delamination after long-term use. At the same time, it meets the CLASS C flame retardant rating, improving the shortcomings of the original flexible modules that are prone to delamination and are not easy to flame retard. The backsheet layer 6 uses an epoxy resin board, which prevents the semi-flexible photovoltaic module from yellowing. The epoxy resin board can also strengthen the backsheet layer 6, making the solar cells 4 less prone to microcracks and breakage, and preventing the semi-flexible photovoltaic module from having large degradation.

[0031] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0032] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A glass-type crystalline silicon semi-flexible photovoltaic module, characterized in that: The laminated assembly (1) includes, from top to bottom, a photovoltaic tempered glass layer (2), a first encapsulation layer (3), a battery cell (4), a second encapsulation layer (5), and a backsheet layer (6). A junction box (8) is provided on one side of the back of the laminated assembly (1), and the junction box (8) is electrically connected to the battery cell (4); The backing layer (6) is either an epoxy resin board or a composite flame-retardant reinforced backing. The laminated assembly (1) is flexible, with a maximum bending angle of 30° to 45°.

2. The glass-type crystalline silicon semi-flexible photovoltaic module according to claim 1, characterized in that: The thickness of the photovoltaic tempered glass layer (2) is set to 1.1 mm to 2.5 mm.

3. The glass-type crystalline silicon semi-flexible photovoltaic module according to claim 1, characterized in that: The first encapsulation layer (3) and the second encapsulation layer (5) are both made of EVA film or POE film.

4. The glass-type crystalline silicon semi-flexible photovoltaic module according to claim 1, characterized in that: The solar cell (4) is any one of N-type monocrystalline TOPCon cell, HJT cell or BC cell.

5. A glass-type crystalline silicon semi-flexible photovoltaic module according to claim 1, characterized in that: The junction box (8) is a waterproof and UV-resistant junction box, and the junction box (8) is provided with a positive terminal (801) and a negative terminal (802).

6. A glass-type crystalline silicon semi-flexible photovoltaic module according to claim 1, characterized in that: The junction box (8) has a built-in anti-reverse charging diode, which is electrically connected to the battery cell (4).

7. A glass-type crystalline silicon semi-flexible photovoltaic module according to claim 1, characterized in that: The outer edges of the laminated component (1) are covered with an aluminum profile frame (7).

8. A glass-type crystalline silicon semi-flexible photovoltaic module according to claim 7, characterized in that: The aluminum profile frame (7) includes a frame (701) around the laminated assembly (1), and two adjacent frames (701) are connected by corner brackets (702).

9. A glass-type crystalline silicon semi-flexible photovoltaic module according to claim 8, characterized in that: The aluminum profile frame (7) is provided with mounting holes (703) for various installation angles.

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