Enhanced light component structure

Abstract

The utility model discloses an enhanced light component structure, which belongs to the technical field of photovoltaic components and comprises a composite material front cover plate, a front aerogel composite material layer, a front packaging adhesive film, a battery string, a back packaging adhesive film and a composite material back plate which are sequentially and fixedly connected from top to bottom. And the composite material front cover plate, the front aerogel composite material layer, the front packaging adhesive film, the battery string, the back packaging adhesive film and the composite material back plate are integrally formed through lamination. And by arranging the front aerogel composite material layer, aerogel can dissipate energy through a porous structure of the aerogel when being impacted, so that the aerogel has impact resistance.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaic modules, and particularly relates to an enhanced lightweight module structure. Background Art

[0002] Photovoltaic modules usually use specific ultra-white glass, also known as low-iron glass. This kind of glass has extremely high light transmittance and mainly serves as cover glass or backplane glass in photovoltaic modules, playing the role of protecting the battery and enhancing the light transmittance. Modules encapsulated with cover glass + glue film + backplane glass are called double-glass modules, and the glass is usually 2.0 mm thick semi-tempered glass; modules encapsulated with cover glass + glue film + polymer material backplane are called single-glass modules, and the glass is usually 3.2 mm thick tempered glass, and the glue film usually uses POE (ethylene / α-olefin copolymer elastomer), EVA (ethylene-vinyl acetate copolymer), PVB (polyvinyl butyral), etc.

[0003] A lightweight module is a module that is relatively lighter in weight, thinner in thickness, and better in flexibility than conventional double-glass / single-glass modules. Its application scenarios include distributed power stations, household photovoltaics, etc., and it can be directly pasted on light-load or curved roofs without the need for brackets or other installation systems.

[0004] For lightweight modules made of composite materials, the module thickness is relatively thin. When impacted by objects such as hail, the impact force on the battery cells cannot be effectively dispersed, which may cause the battery cells to break and the module to fail.

[0005] Currently, there are mainly the following two solutions to solve this problem: 1. Photovoltaic modules using chemically tempered glass with a thinner thickness, such as 1.1 mm thick, as the cover glass. This kind of glass has high strength, the surface stress is greater than 450 Mpa, the module can be bent, and the anti-hail performance is excellent. However, the processing cost of ultra-thin tempered glass is high, and there are potential PID (potential-induced degradation) problems. 2. Using glass fiber as the reinforcing material and cooperating with a resin matrix, that is, glass fiber reinforced plastic (FRP), to encapsulate the battery cells instead of glass. Glass fiber has good mechanical strength and can resist hail impact. However, due to the mismatch of the thermal expansion coefficients of the glass fiber and the resin matrix, long-term thermal cycling may cause the material itself to delaminate, resulting in water vapor intrusion and other problems, causing the module to fail. Content of the Utility Model

[0006] The purpose of the utility model is to provide an enhanced lightweight module structure to solve the problems existing in the above-mentioned prior art.

[0007] To achieve the above object, the present utility model provides the following solution: The present utility model provides an enhanced lightweight component structure, including a composite material front cover plate, a front aerogel composite material layer, a front encapsulation adhesive film, a battery string, a back encapsulation adhesive film, and a composite material back plate, which are fixedly connected in sequence from top to bottom.

[0008] Preferably, the thickness of the composite material front cover plate is 200 - 500 μm.

[0009] Preferably, the thickness of the front aerogel composite material layer is 100 - 300 μm.

[0010] Preferably, the grammage range of the front encapsulation adhesive film is 100 g / m 2 ~400 g / m 2 .

[0011] Preferably, the battery string is composed of a plurality of solar cells connected in series.

[0012] Preferably, the grammage range of the back encapsulation adhesive film is 100 g / m 2 ~500 g / m 2 .

[0013] Preferably, the thickness of the composite material back plate is 200 - 500 μm.

[0014] The present utility model discloses the following technical effects: The composite material front cover plate, the front aerogel composite material layer, the front encapsulation adhesive film, the battery string, the back encapsulation adhesive film, and the composite material back plate are integrally formed by lamination. By providing the front aerogel composite material layer, the aerogel can dissipate energy through its porous structure when being impacted, thus having impact resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0016] Figure 1 is a schematic structural diagram of the enhanced lightweight component structure of the present utility model.

[0017] In the figure: 1. Composite material front cover plate; 2. Front aerogel composite material layer; 3. Front encapsulation adhesive film; 4. Battery string; 5. Back encapsulation adhesive film; 6. Composite material back plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Reference Figure 1 As shown, this embodiment provides an enhanced lightweight component structure, including a composite front cover plate 1, a front aerogel composite material layer 2, a front packaging film 3, a battery string 4, a back packaging film 5 and a composite material back plate 6 fixed in sequence from top to bottom.

[0021] The composite front cover plate 1, the front aerogel composite material layer 2, the front encapsulation film 3, the battery string 4, the back encapsulation film 5 and the composite back plate 6 are integrally formed by lamination. By providing the front aerogel composite material layer 2, the aerogel can dissipate energy through its porous structure when impacted, thereby having impact resistance.

[0022] According to a further optimization scheme, the composite material front cover plate 1 serves as a front protective layer of the component and has weather resistance. The thickness of the composite material front cover plate 1 is 200 to 500 μm.

[0023] Further optimization scheme, the front aerogel composite material layer 2 uses aramid nanofiber aerogel as the front buffer layer of the component, which plays an impact resistance role, and the thickness of the front aerogel composite material layer 2 is 100-300μm. In addition to using aramid nanofiber aerogel, organic aerogels such as cellulose aerogel and polyimide aerogel, 3D printing aerogel, silica aerogel, etc. can also be used. Aerogel is filled in the component packaging layer. When the aerogel is impacted, it can dissipate energy through its porous structure, thus having impact resistance. The lightweight structural composite material prepared by filling the shear thickening glue into the aerogel with an aramid nanofiber structure with an orthogonal laminated layout can induce interlayer slip and intralayer cracks. This reinforcement mechanism and energy dissipation form can attenuate 65%-79% of the impact force, which helps the dynamic compression of the material itself and presents the characteristics of high impact dissipation.

[0024] For a further optimized solution, the front encapsulation film 3 can be a film elastomer formed by one or multiple layers of co-extrusion of substances such as EVA (ethylene-vinyl acetate copolymer), PVB (polyvinyl butyral), and POE (polyolefin thermoplastic elastomer); the grammage range of the front encapsulation film 3 is 100 g / m 2 ~400 g / m 2 。

[0025] For a further optimized solution, the battery string 4 is composed of multiple solar cells connected in series, and crystalline silicon cells or heterojunction cells can be used. In addition to using a film for laminating and encapsulating the battery string 4, methods such as pasting and curing with glue and direct coating can also be used to encapsulate the battery string 4.

[0026] For a further optimized solution, the back encapsulation film 5 can be a film elastomer formed by one or multiple layers of co-extrusion of substances such as EVA (ethylene-vinyl acetate copolymer), PVB (polyvinyl butyral), and POE (polyolefin thermoplastic elastomer), and the grammage range of the back encapsulation film 5 is 100 g / m 2 ~500 g / m 2 。

[0027] For a further optimized solution, the composite material backplane 6 serves as the back protective layer of the component, and has different application effects according to different light transmittance and reflectance. The white backplane can increase the reflection degree of strong light, enabling the battery cells to receive more light energy. The transparent backplane allows the light reflected from the ground to directly act on the battery cells and is suitable for bifacial power generation battery cells; the thickness of the composite material backplane 6 is 200~500 μm.

[0028] Example 1

[0029] The thickness of the composite material front cover plate 1 is 300 μm; the thickness of the front aerogel composite material layer 2 is 100 μm.

[0030] The front encapsulation film 3 uses EVA (ethylene-vinyl acetate copolymer), and the grammage is 200 g / m 2 。

[0031] The battery string 4 is a monocrystalline silicon cell, and each monocrystalline silicon cell is welded in series by a tinned copper strip or bonded by a conductive adhesive. The battery strings 4 form a circuit through series-parallel connection and are led out by a bus bar. The thickness of the battery cell is 150 μm.

[0032] The back encapsulation film 5 uses EVA (ethylene-vinyl acetate copolymer), and the grammage is 300 / m 2 。

[0033] The composite material backplane 6 uses a white backplane with a thickness of 300 μm.

[0034] Lay the above materials on the tooling glass in sequence from top to bottom. After fixing with tape, enter the laminator together with the tooling glass to obtain the laminate of the component. After installing the junction box on the laminate, a lightweight component with impact resistance can be obtained.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0036] The above-described embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. A reinforced lightweight component structure, characterized in that: It comprises a composite material front cover plate (1), a front aerogel composite material layer (2), a front packaging adhesive film (3), a battery string (4), a back packaging adhesive film (5) and a composite material back plate (6) which are fixedly connected in sequence from top to bottom.

2. The reinforced lightweight component structure according to claim 1, characterized in that: The composite material front cover plate (1) has a thickness of 200 to 500 μm.

3. The reinforced lightweight component structure according to claim 1, characterized in that: The thickness of the front aerogel composite material layer (2) is 100 to 300 μm.

4. The reinforced lightweight component structure according to claim 1, characterized in that: The weight range of the front packaging film (3) is 100 g / m 2 ~400g / m 2 .

5. The reinforced lightweight component structure according to claim 1, characterized in that: The battery string (4) is composed of a plurality of solar cells connected in series.

6. The reinforced lightweight component structure according to claim 1, characterized in that: The weight range of the back side packaging film (5) is 100 g / m 2 ~500g / m 2 .

7. The reinforced lightweight component structure according to claim 1, characterized in that: The composite material back plate (6) has a thickness of 200 to 500 μm.

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