Lightweight photovoltaic module

Abstract

The utility model relates to photovoltaic module field discloses a kind of light steel photovoltaic modules, including frame, and the inside of frame is equipped with photovoltaic piece;Photovoltaic piece is sequentially composed of thin tempered glass layer, first polymer encapsulation layer, photovoltaic cell piece layer, second polymer encapsulation layer and backboard layer;The bottom of backboard layer is equipped with heating layer;The discharge side of frame is equipped with at least two slitting parts, to be slitting or blocking when snow layer slides, when blocking, cooperate heating layer to heat snow layer.The utility model proposes a kind of light steel photovoltaic module, uses 1.1mm thin tempered glass layer, solves standard component weight problem, and its toughness is high, adapts insufficient roof load bearing;Backboard layer bottom electrothermal film heating layer can heat layer by layer heat band melt snow, cooperate frame discharge side sheet type slitting part, can be slitting snow block impact, stop stagnation snow layer and assist snow melting, reduce snow accumulation, avoid building secondary load bearing pressure, guarantee photovoltaic cell piece layer light, maintain photoelectric conversion efficiency, ensure normal operation in winter.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic module technology, and more specifically, to a light steel photovoltaic module. Background Technology

[0002] Photovoltaic modules (also known as solar panels) are the core devices for converting solar energy into electrical energy. They are made of solar cells of materials such as monocrystalline silicon and polycrystalline silicon connected in series and parallel, and encapsulated with tempered glass, EVA film, etc. They are resistant to outdoor environments. They work based on the "photovoltaic effect". When sunlight shines on the semiconductor, it excites electron-hole pairs, which are separated by the electric field of the PN junction to form direct current (DC) power. The modules come in various specifications and can be used for small-scale off-grid power supply, or they can be used to form photovoltaic arrays, connected to inverters to convert AC power for residential / commercial use or grid-connected. They are key equipment for the large-scale utilization of solar energy.

[0003] With the popularization of photovoltaic technology, the application of traditional crystalline silicon photovoltaic modules has approached saturation. Currently, the mainstream standard photovoltaic modules usually adopt a symmetrical structure of "2mm heat-strengthened glass (or tempered glass) + ethylene-vinyl acetate copolymer (EVA) + solar cell (CELL) + EVA + 2mm heat-strengthened glass". Although this structure has good mechanical strength and durability, it is heavy (usually exceeding 20kg / ㎡), which greatly limits its application in many potential scenarios, such as: old industrial plants, warehouses, and residential roofs with insufficient load-bearing capacity. Their building structures cannot support the weight of traditional modules, posing safety hazards. At the same time, the accumulation of snow layers after the installation of photovoltaic modules further increases the safety hazards of the building. Utility Model Content

[0004] This utility model provides a lightweight steel photovoltaic module, which solves the technical problems of lightweight steel photovoltaic modules being heavy and unsuitable for old buildings in related technologies.

[0005] This utility model provides a lightweight steel photovoltaic module, including a frame, and photovoltaic components are provided inside the frame; The photovoltaic component is composed of a thin tempered glass layer, a first polymer encapsulation layer, a photovoltaic cell layer, a second polymer encapsulation layer, and a backsheet layer in sequence. A heating layer is provided at the bottom of the back plate layer; The frame has at least two cutting elements on the discharge side to cut or block the snow layer when it slides down. When blocking, it works in conjunction with the heating layer to heat the snow layer.

[0006] As a further optimization of this utility model, the thickness of the thin tempered glass layer is 1.1 mm.

[0007] As a further optimization of this utility model, the first polymer encapsulation layer is an EPE or POE encapsulation layer.

[0008] As a further optimization of this utility model, the second polymer encapsulation layer is an EVA or POE encapsulation layer.

[0009] As a further optimization of this utility model, the back sheet layer is a KPC back sheet layer.

[0010] As a further optimization of this utility model, the heating layer is an electrothermal film heating layer.

[0011] As a further optimization of this utility model, multiple slitting components are provided.

[0012] As a further optimization of this utility model, the plurality of slitting parts are distributed at equal intervals on the discharge side of the frame.

[0013] As a further optimization of this utility model, the slitting component is a thin sheet.

[0014] The beneficial effects of this utility model are as follows: 1. The lightweight steel photovoltaic module described in this utility model effectively solves the weight problem of standard modules by setting a 1.1mm thin tempered glass layer, and the chemically tempered glass has higher toughness, making it suitable for roofs with insufficient load-bearing capacity.

[0015] 2. The lightweight steel photovoltaic module described in this utility model generates heat through the heating layer of the electrothermal film at the bottom of the backsheet layer, which can transfer heat layer by layer to the surface of the module, efficiently melting snow. In conjunction with the thin-plate slitting piece on the frame discharge side, it can not only divide large snow layers into smaller pieces when the snow slides down, preventing snow blocks from impacting the building structure, but also block stagnant snow layers, allowing them to fully receive heat from the heating layer, thus improving snow melting efficiency. This snow removal combination can effectively reduce the amount of snow accumulation on the module surface, on the one hand avoiding the additional load-bearing pressure on the building caused by the extra weight of the module due to snow accumulation, and on the other hand preventing snow cover from blocking sunlight, ensuring that the photovoltaic cell layers continuously receive sunlight, maintaining stable photoelectric conversion efficiency, and ensuring that the module can still operate normally in winter snowy weather. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a lightweight steel photovoltaic module proposed in this utility model.

[0017] Figure 2 This is a side sectional view of the photovoltaic component in a lightweight steel photovoltaic module proposed in this utility model.

[0018] In the picture: 1. Framework; 2. Thin tempered glass layer; 3. First polymer encapsulation layer; 4. Photovoltaic cell layer; 5. Second polymer encapsulation layer; 6. Back panel layer; 7. Heating layer; 8. Cut into pieces. Detailed Implementation

[0019] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0020] Example 1 like Figures 1 to 2 As shown, a lightweight steel photovoltaic module according to an embodiment of the present invention includes a frame 1, and photovoltaic components are provided inside the frame 1; The photovoltaic component is composed of a thin tempered glass layer 2, a first polymer encapsulation layer 3, a photovoltaic cell layer 4, a second polymer encapsulation layer 5, and a backsheet layer 6 in sequence. The thickness of the thin tempered glass layer 2 is 1.1 mm.

[0021] The first polymer encapsulation layer 3 is an EPE or POE encapsulation layer.

[0022] Both EPE and POE materials possess excellent insulation properties, preventing leakage between the photovoltaic cell layer 4 and the thin tempered glass layer 2, thus ensuring the electrical safety of the module. Furthermore, their good sealing properties effectively prevent air and moisture from entering the photovoltaic cell layer 4, reducing the risk of damage to the photovoltaic cell layer 4 due to oxidation and moisture, extending the service life of the photovoltaic cell layer 4, and ensuring that the photovoltaic module can continuously and stably perform photoelectric conversion, providing a reliable guarantee for subsequent power output.

[0023] The thickness of the thin tempered glass layer 2 is set at 1.1mm. While ensuring a certain level of light transmittance and mechanical strength, it significantly reduces its own weight compared to the 2mm heat-strengthened glass (or tempered glass) in traditional photovoltaic modules, thereby reducing the overall weight of the entire lightweight photovoltaic module. The thinner thickness allows the thin tempered glass layer 2 to effectively allow sunlight to pass through and irradiate the photovoltaic cell layer 4, while protecting the basic functions of the internal structure, without placing an excessive load on the frame 1 and the building to which it is installed. This makes it more suitable for the characteristics of insufficient load-bearing capacity in old buildings, reducing safety hazards when installing on the roofs of old buildings. It also facilitates the transportation and installation of the modules, reducing labor and equipment costs during the installation process.

[0024] The second polymer encapsulation layer 5 is an EVA or POE encapsulation layer.

[0025] Both EVA and POE encapsulation layers can work synergistically with the first polymer encapsulation layer 3 to comprehensively wrap and protect the photovoltaic cell layer 4 from both the top and bottom, further enhancing the sealing and insulation of the module, ensuring that the photovoltaic cell layer 4 is always in a good working environment and maintaining stable photoelectric conversion efficiency.

[0026] Backsheet layer 6 is a KPC backsheet layer.

[0027] Example 2 Based on Embodiment 1, a heating layer 7 is provided at the bottom of the back plate layer 6; The discharge side of the frame 1 (since the photovoltaic components are usually set at an angle, one side of the frame 1 forms an angled discharge side) is provided with multiple cutting pieces 8 to cut or block the snow layer when it slides down. When blocking, it works with the heating layer 7 to heat the snow layer.

[0028] The heating layer 7 is located at the bottom of the backsheet layer 6. When the outdoor ambient temperature is low and snow accumulates on the surface of the module, the heating layer 7 can be connected to the power supply to generate heat. The heat is gradually transferred through the backsheet layer 6 to other layers of the photovoltaic module, and then to the snow layer on the surface of the module, heating the snow layer, raising its temperature, accelerating the melting rate of the snow layer, reducing the amount of snow accumulation on the surface of the module, avoiding excessive snow accumulation from increasing the weight of the module, reducing the pressure on the support structure of the frame 1 and the installation building, and at the same time preventing snow cover from affecting sunlight to the photovoltaic cell layer 4, ensuring that the photoelectric conversion efficiency of the photovoltaic module is not seriously affected by snow accumulation.

[0029] The slitting component 8 is installed on the discharge side of the frame 1. When the snow layer on the surface of the photovoltaic module begins to slide off under the action of gravity, the slitting component 8 can slid off the sliding snow layer, dividing the larger snow layer into smaller snow blocks, so that the snow blocks can slide off the module surface more smoothly, avoiding the impact of large snow layers on the frame 1 or surrounding objects when they slide off. At the same time, the slid snow layer disperses, reducing the impact force. When the snow layer slides off slowly or some snow layer stops on the module surface, the slitting component 8 can act as a block, allowing the snow layer to temporarily stay on the surface of the photovoltaic module. At this time, in conjunction with the heat generated by the heating layer 7, the snow layer can be heated more fully, causing the snow layer to melt into liquid, avoiding the snow layer from directly scattering and impacting, further ensuring the normal operation of the module and the safety of the installed building. It effectively solves the problem of the large weight of the module and its unsuitability for old buildings in related technologies, and is suitable for old industrial plants, warehouses, residential roofs and other scenarios with insufficient load-bearing capacity.

[0030] Heating layer 7 is an electrothermal film heating layer.

[0031] Heating layer 7 is an electrothermal film heating layer, which features uniform heating. When it is necessary to heat the snow layer on the surface of the module, the electrothermal film heating layer can quickly and evenly generate heat after being powered on. The heat is transferred to the backsheet layer 6 through close contact with it. Then, the backsheet layer 6 transfers the heat to the second polymer encapsulation layer 5, the photovoltaic cell layer 4, the first polymer encapsulation layer 3, and the thin tempered glass layer 2, and finally to the snow layer on the surface of the module, so that the snow layer is heated evenly, which accelerates the melting speed of the snow layer and avoids the snow layer melting too quickly in some areas, resulting in snow accumulation in other areas. In addition, the electrothermal film heating layer is thin and lightweight, which will not significantly increase the weight of the entire light steel photovoltaic module, meeting the design requirements of lightweight modules. At the same time, its installation method is flexible and can be tightly attached to the bottom of the backsheet layer 6 to ensure heat transfer efficiency and effectively reduce the impact of snow accumulation on the module in snowy weather, maintaining the normal operating efficiency of the module.

[0032] Multiple slit pieces 8 are evenly distributed on the discharge side of frame 1.

[0033] This ensures that the cutting component 8 forms a uniform working area on the discharge side of the frame 1, ensuring that the snow layer is cut by the cutting component 8 during the sliding process, reducing the situation where large pieces of snow layer cannot be effectively cut due to uneven distribution of the cutting component 8.

[0034] The slitting component 8 is a thin sheet. The thin sheet structure of the slitting component 8 is lightweight and will not increase the overall weight of the light steel photovoltaic module. This conforms to the design concept of lightweight modules and avoids increasing the load on the frame 1 and the installation building due to the excessive weight of the slitting component 8.

[0035] The embodiments of the present utility model have been described above, but the present embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present embodiments, all of which are within the protection scope of the present embodiments.

Claims

1. A lightweight steel photovoltaic module, comprising a frame (1), characterized in that: The frame (1) is equipped with photovoltaic components inside; The photovoltaic component is composed of a thin tempered glass layer (2), a first polymer encapsulation layer (3), a photovoltaic cell layer (4), a second polymer encapsulation layer (5), and a backsheet layer (6) in sequence. A heating layer (7) is provided at the bottom of the back plate layer (6); The frame (1) is provided with at least two cutting pieces (8) on the discharge side to cut or block the snow layer when it slides down. When blocking, it works with the heating layer (7) to heat the snow layer.

2. The light steel photovoltaic module according to claim 1, characterized in that: The thickness of the thin tempered glass layer (2) is 1.1 mm.

3. The light steel photovoltaic module according to claim 1, characterized in that: The first polymer encapsulation layer (3) is an EPE or POE encapsulation layer.

4. The light steel photovoltaic module according to claim 1, characterized in that: The second polymer encapsulation layer (5) is an EVA or POE encapsulation layer.

5. The light steel photovoltaic module according to claim 1, characterized in that: The backsheet layer (6) is a KPC backsheet layer.

6. The light steel photovoltaic module according to claim 1, characterized in that: The heating layer (7) is an electrothermal film heating layer.

7. The light steel photovoltaic module according to any one of claims 1-6, characterized in that: Multiple slitting pieces (8) are provided.

8. The light steel photovoltaic module according to claim 7, characterized in that: Multiple cut pieces (8) are evenly distributed on the discharge side of the frame (1).

9. The light steel photovoltaic module according to claim 8, characterized in that: The slitting piece (8) is a thin sheet.

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