High-efficiency photovoltaic curtain wall assembly

Abstract

The utility model discloses a high-efficiency photovoltaic curtain wall assembly which comprises front glass, a front packaging adhesive film, a middle battery structure layer, a back packaging adhesive film and back glass which are sequentially stacked. The middle battery structure layer is composed of an outer side battery layer, middle glass and an inner side battery layer; the outer side battery layer and the inner side battery layer are arranged on the two sides of the middle glass respectively, and the inner side battery layer and the outer side battery layer are attached to the back face packaging adhesive film and the front face packaging adhesive film respectively; a plurality of first light-transmitting areas and second light-transmitting areas are arranged in the outer side battery layer and the inner side battery layer respectively, the first light-transmitting areas and the second light-transmitting areas are arranged in a staggered mode, and the second light-transmitting areas are arranged at the lower positions of the first light-transmitting areas; the band gap of the outer cell layer is smaller than that of the inner cell layer. The design of the light-transmitting areas and the battery areas which are distributed in a staggered mode is utilized, the effect of double-face power generation is achieved, the outer side battery layer utilizes sunlight to generate power, the inner side battery layer utilizes transmission light or indoor illumination light to generate power, the photoelectric conversion efficiency is improved, and the requirement for indoor lighting is met.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic components, in particular to a high-efficiency photovoltaic curtain wall component. Background Art

[0002] Thin-film batteries can be made into semi-transparent batteries due to their adjustable band gap and battery structure, and applied to the field of architecture. At present, most of the thin-film battery components combined with buildings on the market are mainly single-sided power generation, and in order to meet the indoor lighting requirements, thin-film batteries have a certain light-transmitting effect, but this will lose some of the power generation power. Utility Model Content

[0003] The purpose of the utility model is to provide a high-efficiency photovoltaic curtain wall component, which can not only improve the photoelectric conversion efficiency of thin-film batteries, but also meet indoor lighting needs.

[0004] The utility model is realized through the following technical solutions:

[0005] The utility model designs a high-efficiency photovoltaic curtain wall component, which comprises front glass, front packaging film, middle battery structure layer, back packaging film and back glass which are stacked in sequence;

[0006] Wherein: the middle battery structure layer is composed of an outer battery layer, a middle glass and an inner battery layer; the outer battery layer and the inner battery layer are respectively arranged on both sides of the middle glass, and the outer battery layer is adhered to the front packaging film, and the inner battery layer is adhered to the back packaging film; a plurality of first light-transmitting areas and a plurality of second light-transmitting areas are respectively arranged in the outer battery layer and the inner battery layer, and the plurality of first light-transmitting areas and second light-transmitting areas are staggered in the first direction of the photovoltaic curtain wall component, and the second light-transmitting area is arranged below the first light-transmitting area; the band gap of the outer battery layer is smaller than that of the inner battery layer.

[0007] It can be understood that the outer battery layer and the inner battery layer are respectively composed of a power generation area and a light transmission area. For example, the outer battery layer can be formed by a plurality of first thin film battery sheets arranged at intervals, wherein all the first thin film battery sheets constitute the power generation area, and the interval area between the first thin film battery sheets is the first light transmission area. The inner battery layer can be formed by a plurality of second thin film battery sheets arranged at intervals, wherein all the second thin film battery sheets constitute the power generation area, and the area between the second thin film battery sheets is the second light transmission area.

[0008] Furthermore, a high-efficiency photovoltaic curtain wall assembly: the middle glass is formed by bonding a first glass and a second glass; the outer battery layer is arranged on the first glass, and the inner battery layer is arranged on the second glass, and the first glass and the second glass are bonded together by a packaging film to form the middle battery structure layer.

[0009] Furthermore, a high-efficiency photovoltaic curtain wall assembly: the thickness of the middle glass is set to 0.45-2.0 mm.

[0010] Furthermore, a high-efficiency photovoltaic curtain wall assembly: the thickness of the front glass and the back glass are respectively set to 2.0-5.0 mm.

[0011] Furthermore, in a high-efficiency photovoltaic curtain wall assembly, the band gap of the outer battery layer is 1.0 to 1.3 eV, and the band gap of the inner battery layer is 1.7 to 2.0 eV. The band gap of the inner battery layer is preferably 1.8 to 1.9 eV.

[0012] Furthermore, a high-efficiency photovoltaic curtain wall assembly: the circuit loops of the outer battery layer and the inner battery layer are independent of each other, and are led out as positive and negative lead wires respectively.

[0013] Furthermore, in a high-efficiency photovoltaic curtain wall assembly, the first light-transmitting area and the second light-transmitting area occupy 30-70% of the area of ​​the outer battery layer and the inner battery layer respectively.

[0014] Furthermore, in a high-efficiency photovoltaic curtain wall assembly, the second light-transmitting area is disposed 0.1 to 1.5 mm below the first light-transmitting area.

[0015] Specifically, the utility model optimizes the space and stacks the band gap combination of two single-junction batteries with an outer narrow band gap and an inner wide band gap on the glass, and provides staggered strip battery areas and light-transmitting areas on both sides, namely, an outer battery area and an inner battery area with the same area, including an outer narrow band gap battery, a middle glass substrate and an inner wide band gap battery, wherein the band gap width of the outer battery layer is 1.0-1.3eV, and the band gap width of the inner battery layer is 1.7-2.0eV.

[0016] Beneficial effects of the utility model:

[0017] (1) The high-efficiency photovoltaic curtain wall component structure designed in the present invention achieves the effect of double-sided power generation through the design of the middle battery structure layer and the staggered distribution of the light-transmitting area and the thin-film battery area. The outer battery layer generates electricity using sunlight, and the inner battery layer generates electricity using transmitted light or indoor lighting, thereby achieving the purpose of improving the photoelectric conversion efficiency. At the same time, the design of the light-transmitting area and the thin-film power generation area can meet the indoor lighting needs.

[0018] (2) The photovoltaic curtain wall component structure designed by the utility model adopts a three-glass structure of front and back glass + middle glass, which has high strength; at the same time, the photovoltaic curtain wall component structure designed by the utility model can make full use of external sunlight and indoor light, effectively improve the power generation of the component, and meet the indoor lighting needs. In addition, according to the angle of sunlight, the utility model sets a staggered arrangement structure of the inner battery layer light-transmitting area (second light-transmitting area) and the outer battery layer light-transmitting area (first light-transmitting area), which can further increase the light transmittance while reducing direct light.

[0019] (3) The photovoltaic curtain wall component structure designed by the utility model can absorb light to the maximum extent on both sides to generate electricity, while also achieving the effect of uniform light transmission. In addition, the three-glass structure has higher strength and can be applied to BIPV photovoltaic buildings. The components can be installed on the facade curtain wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic structural diagram of a high-efficiency photovoltaic curtain wall assembly designed for Example 1;

[0022] Figure 2 This is a schematic diagram of the structure of the middle battery structure layer in Example 1;

[0023] Figure 3 A schematic diagram of the structure of the intermediate battery structure layer in Example 2.

[0024] Markings in the figure: 1-front glass, 2-front packaging film, 3-middle battery structure layer, 4-back packaging film, 5-back glass, 31-outer battery layer, 32-middle glass, 33-inner battery layer, 311-first light-transmitting area, 321-first glass, 322-second glass, 331-second light-transmitting area. DETAILED DESCRIPTION

[0025] 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. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. 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.

[0026] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom" and the like indicate positions or positional relationships, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second" and the like are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein.

[0027] Example 1

[0028] like Figures 1-2 As shown, a high-efficiency photovoltaic curtain wall assembly is designed, which includes a front glass 1, a front encapsulation film 2, an intermediate battery structure layer 3, a back encapsulation film 4 and a back glass 5 which are stacked in sequence; wherein: the thickness of the front glass 1 and the back glass 5 are respectively set to 2.0-5.0 mm;

[0029] Wherein: the middle battery structure layer 3 is composed of an outer battery layer 31, a middle glass 32 and an inner battery layer 33, and the middle glass 32 is a whole piece of glass with a thickness of 0.45 to 2.0 mm;

[0030] The outer battery layer 31 and the inner battery layer 33 are respectively arranged on both sides of the middle glass 32, and the outer battery layer 31 is attached to the front packaging film 2, and the inner battery layer 33 is attached to the back packaging film 4; the circuit loops of the outer battery layer 31 and the inner battery layer 33 are independent of each other, and are respectively led out as positive and negative lead wires;

[0031] The outer battery layer 31 and the inner battery layer 33 are respectively provided with a plurality of first light-transmitting areas 311 and a plurality of second light-transmitting areas 331 corresponding to each other, and the first light-transmitting areas 311 and the second light-transmitting areas 331 are respectively equivalent to the gaps between the thin-film battery sheets in the outer battery layer 31 and the inner battery layer 33; the first light-transmitting areas 311 and the second light-transmitting areas 331 respectively occupy 30-70% of the area of ​​the outer battery layer 31 and the inner battery layer 33; the band gap of the outer battery layer 31 is adjusted to 1.0-1.3 eV, absorbing sunlight of 300-1100 nm, and the band gap of the inner battery layer 33 is 1.7-2.0 eV;

[0032] The first light-transmitting areas 311 and the second light-transmitting areas 331 are staggered in the first direction of the photovoltaic curtain wall assembly, and each of the second light-transmitting areas 331 is arranged 0.1 to 1.5 mm below the corresponding first light-transmitting area 311 .

[0033] like Figures 1-2 As shown, the photovoltaic curtain wall assembly designed in the above-mentioned embodiment 1 is respectively prepared with an outer battery layer 31 and an inner battery layer 33 on both sides of the middle glass 32, and the circuit loops of the battery layers on both sides are independent of each other, and the positive and negative electrodes are respectively led out as leads. Subsequently, the stacked assembly is placed in a laminator for lamination to obtain the photovoltaic curtain wall assembly. Among them, the outer battery layer 31 and the inner battery layer 33 are stacked from the outside to the inside to form a structure that fully utilizes external sunlight and indoor light, which not only improves the power generation of the assembly, but also meets the internal lighting requirements. At the same time, this assembly of embodiment 1 can absorb light to the maximum extent on both sides for power generation, and also achieves the effect of uniform light transmission, and the utility model adopts a three-glass structure (front glass, middle glass, back glass), which has higher strength and can be applied to BIPV photovoltaic buildings, and the assembly can be installed on the facade curtain wall.

[0034] Example 2

[0035] The difference between Example 2 and Example 1 is that the middle glass 32 in Example 1 is a whole piece of glass, and the outer battery layer 31 and the inner battery layer 33 are arranged on two opposite sides of the glass; while the middle glass 32 in Example 2 is formed by laminating a first glass 321 and a second glass 322, wherein the outer battery layer 31 is arranged on one side of the first glass 321, and the inner battery layer 33 is arranged on one side of the second glass 322, and then the first glass 321 and the second glass 322 are laminated on the sides where the battery layer is not arranged by a packaging film to form a middle battery structure layer 3 (such as Figure 3 As shown), the rest of Example 2 is the same as Example 1.

[0036] The above preferred embodiments of the utility model are only used to explain the utility model, and are not used to limit the utility model. Any obvious changes or modifications derived from the technical solution of the utility model are still within the protection scope of the utility model.

Claims

1. A high-efficiency photovoltaic curtain wall assembly, characterized in that: The photovoltaic curtain wall assembly comprises front glass (1), front packaging film (2), middle battery structure layer (3), back packaging film (4) and back glass (5) which are stacked in sequence; Wherein: the middle battery structure layer (3) is composed of an outer battery layer (31), a middle glass (32) and an inner battery layer (33); The outer battery layer (31) and the inner battery layer (33) are respectively arranged on both sides of the middle glass (32), and the outer battery layer (31) is bonded to the front packaging film (2), and the inner battery layer (33) is bonded to the back packaging film (4); The outer battery layer (31) and the inner battery layer (33) are respectively provided with a plurality of first light-transmitting areas (311) and a plurality of second light-transmitting areas (331); the plurality of first light-transmitting areas (311) and the second light-transmitting areas (331) are staggered in a first direction, and the second light-transmitting areas (331) are arranged at a lower position of the first light-transmitting areas (311); the band gap of the outer battery layer (31) is smaller than that of the inner battery layer (33).

2. A high-efficiency photovoltaic curtain wall assembly according to claim 1, characterized in that: The intermediate glass (32) is formed by bonding a first glass (321) and a second glass (322); the outer battery layer (31) is arranged on the first glass (321), and the inner battery layer (33) is arranged on the second glass (322); the first glass (321) and the second glass (322) are bonded together by a packaging film to form the intermediate battery structure layer (3).

3. A high-efficiency photovoltaic curtain wall assembly according to claim 1 or 2, characterized in that: The thickness of the intermediate glass (32) is set to 0.45-2.0 mm.

4. A high-efficiency photovoltaic curtain wall assembly according to claim 1, characterized in that: The thickness of the front glass (1) and the back glass (5) are respectively set to 2.0-5.0 mm.

5. The high-efficiency photovoltaic curtain wall assembly according to claim 1, characterized in that: The band gap of the outer battery layer (31) is 1.0 to 1.3 eV, and the band gap of the inner battery layer (33) is 1.7 to 2.0 eV.

6. A high-efficiency photovoltaic curtain wall assembly according to claim 1, characterized in that: The circuit loops of the outer battery layer (31) and the inner battery layer (33) are independent of each other and are led out as positive and negative electrode lead wires respectively.

7. The high-efficiency photovoltaic curtain wall assembly according to claim 1, characterized in that: The first light-transmitting area (311) and the second light-transmitting area (331) respectively occupy 30 to 70% of the area of ​​the outer battery layer (31) and the inner battery layer (33).

8. The high-efficiency photovoltaic curtain wall assembly according to claim 1, characterized in that: The second light-transmitting area (331) is disposed 0.1 to 1.5 mm below the first light-transmitting area (311).

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