IBC high-efficiency photovoltaic lightweight assembly

Abstract

The utility model discloses an IBC high-efficiency photovoltaic light assembly, which comprises a transparent front plate, an adhesive film, a battery piece, a conductive adhesive, an insulating layer, a conductive foil, an adhesive film and an integrated back plate which are laminated together from top to bottom. In the structure, the transparent front plate is made of non-fluorine-containing materials such as resin, so that the transparent front plate is excellent in light transmission and can effectively protect the battery piece. The integrated backboard is made of composite materials of glass fibers and epoxy resin materials, and the overall strength of the assembly is guaranteed through the excellent stiffness of the integrated backboard and the capability of reducing local deformation of the assembly. The whole structure is fixed together through a high-temperature lamination process to form a stable, light and flexible solar cell light component.

Description

Technical Field

[0001] The utility model relates to an IBC high-efficiency photovoltaic lightweight component, belongs to the technical field of solar photovoltaic power generation, and is particularly suitable for the production and manufacture of solar photovoltaic components. Background Art

[0002] For more than 20 years since the commercialization of photovoltaic modules, the product design structure of photovoltaic modules has basically maintained the traditional 5-layer product stacking structure, namely back sheet (or glass) / film / cell / film / tempered glass. This structure has sufficient hardness and excellent protection for the internal cells due to the presence of single-sided glass or double-sided glass materials. However, this traditional laminated material selection has some disadvantages, such as heavy weight and almost no flexibility. At the same time, due to its heavy weight and lack of flexibility, it is not conducive to its installation on the roof of the color steel tile factory with weak bearing capacity and related buildings designed as curved roofs. Summary of the invention

[0003] Purpose of the utility model: In order to overcome the problems of heavy weight and lack of flexibility of traditional glass components, the utility model proposes a new type of IBC high-efficiency photovoltaic lightweight component. The utility model is an IBC high-efficiency photovoltaic lightweight component that is laminated by several lightweight materials including an integrated backplane instead of using photovoltaic glass materials for lamination.

[0004] Technical solution: An IBC high-efficiency photovoltaic lightweight component, including a transparent front plate, an adhesive film, a battery cell, a conductive adhesive and an insulating layer, a conductive foil, an adhesive film and an integrated back plate stacked together from top to bottom.

[0005] The existing component stacking materials and sequence are as follows:

[0006] Photovoltaic glass → film → battery cell → film → photovoltaic glass (or back panel).

[0007] The utility model abandons the use of photovoltaic glass and replaces the photovoltaic glass lamination material in the traditional component lamination.

[0008] The front side of the utility model uses a transparent front plate material to protect the battery cell. The transparent front plate is made of a double-layer structure full resin material, the upper layer of which is a fluorine-containing resin material, and the lower layer is a full resin material. The surface is highly flat and light and soft, so that the overall light transmittance of the component is high and the power loss is small. In addition to the above advantages, the addition of fluorine makes it excellent in resistance to ultraviolet aging and moisture and heat aging. Combined with its excellent hardness performance, it can effectively protect the battery cell from external damage for a long time. After high-temperature lamination, the degree of deformation can be ignored and the bonding strength with adhesive film materials such as EVA / POE is excellent. Due to the selection of an integrated backplane, the high-transmittance reinforcing materials such as glass fiber used in ordinary photovoltaic lightweight components can be abandoned between the transparent front plate of the component and the battery cell layer, thereby further optimizing the light transmission effect.

[0009] The integrated backplane is an integrated backplane composited with glass fiber and epoxy resin. Compared with photovoltaic glass, the integrated backplane formed by the composite of the two materials is light in weight, flexible, and has excellent structural strength, which can reduce local deformation, thereby protecting the entire component from damage due to excessive deformation. Between the front and rear backplanes, the adhesive film is laminated with the conductive foil, insulating layer, conductive adhesive and battery cell. The adhesive film material can be selected from EVA, POE, EPE and PVB. After high-temperature lamination, the overall laminate adhesion is excellent.

[0010] Beneficial effects: Compared with the prior art, the IBC high-efficiency photovoltaic lightweight component provided by the utility model is a transparent front plate, battery sheet, conductive glue, insulating layer, conductive foil, integrated back plate and adhesive film that are laminated at high temperature to form an IBC high-efficiency photovoltaic lightweight component with light weight, flexibility and excellent strength performance, which makes it possible to lay rooftop photovoltaics on the roof of a color steel tile factory building with weak load-bearing capacity and a building with a curved roof structure. It has the following advantages:

[0011] (1) Light weight and thin thickness: The overall component is lighter and thinner than glass components, and can be used on surfaces with weak bearing capacity.

[0012] (2) Good flexibility: The component as a whole has a certain flexibility and can be applied to surfaces with a certain curvature, increasing the effective light-collecting area and making it beautiful.

[0013] (3) Save transportation costs: Compared with glass modules with the same cell arrangement, the modules are thinner and lighter in weight while having roughly the same surface area, which effectively saves transportation costs.

[0014] (4) Simple processing, operation and control: Only the transparent front panel, battery layer and integrated back panel are stacked. The manufacturing process of the component is simpler, easier to control and operate, and the production steps are reduced, which can effectively reduce the defective rate.

[0015] (5) Ease of use: The optimized component stacking structure makes it more convenient and stable to use, providing a better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic cross-sectional view of components of an embodiment of the utility model;

[0017] 1-transparent front panel, 2-adhesive film, 3-battery cell, 4-conductive adhesive, 5-insulating layer, 6-conductive foil, 7-adhesive film, 8-integrated back panel. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figure 1 As shown, the IBC high-efficiency photovoltaic lightweight component includes a transparent front plate 1 / adhesive film 2 / cell 3 / conductive adhesive 4+insulating layer 5 / conductive foil 6 / adhesive film 7 / integrated back plate 8 laminated together from top to bottom. The conductive adhesive 4 and the insulating layer 5 are arranged in the same layer. In this structure, the transparent front plate 1 is a transparent front plate 1 made of non-fluorine-containing materials such as resin, which has excellent light transmittance and can effectively protect the cell. The integrated back plate 8 is a back plate made of a composite material of glass fiber and epoxy resin, which ensures the overall strength of the component with its excellent stiffness and its ability to reduce local deformation of the component. The entire structure is fixed together by a high-temperature lamination process to form a stable, lightweight and flexible solar cell lightweight component.

[0020] Through the selection of transparent front plate and integrated back plate, multiple aspects of optimization are achieved. First, the use of a transparent front plate alone on the front side ensures the light transmittance of the front side of the component and the protection of the battery cells. Secondly, the choice of an integrated back plate ensures the overall structural strength of the component and further ensures the high quality of the component. Finally, the overall material selection abandons traditional photovoltaic glass and achieves the characteristics of lightness and excellent flexibility. The combined effect of all these advantages enables the IBC high-efficiency photovoltaic lightweight component of the utility model to reach a high level in performance and applicability.

[0021] The IBC high-efficiency photovoltaic lightweight component of the utility model, the synergistic effect of various materials makes the product a choice of light weight, thin thickness and good flexibility.

[0022] IBC high-efficiency photovoltaic lightweight module manufacturing process:

[0023] 1. Cutting and preparation of materials: including solar cells, insulation layer + conductive glue, conductive foil, transparent front panel, integrated back panel and adhesive film. Cut these materials into the required size, and these materials need to undergo strict quality inspection to ensure that they meet the production requirements. The operation process such as applying conductive glue shall comply with the corresponding operation specifications.

[0024] 2. Cell testing: Test the appearance, color difference, resistivity and other parameters of solar cells to ensure that their performance and quality meet the requirements.

[0025] 3. Welding: Weld the solar cells according to the design requirements to form cell strings and interconnecting strips. Pay attention to the welding quality and stability of the cells during welding.

[0026] 4. Component production: The welded battery strings are packaged, laminated at high temperature, installed in junction boxes, and cured according to the component arrangement with transparent front panels, insulating layers + conductive adhesives, conductive foils, integrated back panels, and adhesive films to form IBC high-efficiency photovoltaic lightweight components. During the packaging process, attention should be paid to sealing and waterproofness.

[0027] 5. Testing and packaging: Test the manufactured IBC high-efficiency photovoltaic lightweight components, including electrical performance testing, appearance testing, weather resistance testing, etc., to ensure that they meet the design requirements and quality standards. Finally, package them for transportation and storage.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. An IBC high-efficiency photovoltaic lightweight component, characterized in that: It includes a transparent front plate, a film, a battery cell, a conductive adhesive and an insulating layer, a conductive foil, a film and an integrated back plate which are stacked together from top to bottom; the integrated back plate is made of a composite material of glass fiber and epoxy resin.

2. The IBC high-efficiency photovoltaic lightweight component according to claim 1, characterized in that: The transparent front plate is made of a double-layer structure full resin material, wherein the upper layer is a fluorine-containing resin material and the lower layer is a full resin material.

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