Photovoltaic hollow assembly

Abstract

The utility model provides a photovoltaic hollow assembly, which comprises a battery structure and a hollow glass structure which are overlapped, the battery structure sequentially comprises front plate glass, an adhesive layer, a battery piece layer arranged in the adhesive layer and middle layer glass; the battery piece layer comprises a low-transmittance area and a light-transmittance area, the low-transmittance area is provided with a crystal silicon battery piece, and the light-transmittance area is provided with a thin film battery piece. According to the photovoltaic hollow assembly, the crystalline silicon battery piece and the thin film battery piece are combined, and the crystalline silicon battery piece provides efficient photoelectric conversion performance, so that the generating capacity of the whole assembly is ensured; and the thin film battery piece gives consideration to light transmission, so that when the module is applied, a good natural lighting effect can be provided, and the purpose of being attractive is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of solar cells, and particularly relates to a photovoltaic hollow module. Background Art

[0002] With the demands of countries around the world for building energy conservation and appearance, the application of photovoltaic hollow modules in buildings is becoming more and more extensive. Especially for colored photovoltaic modules, they can generate rich and colorful light while generating electricity, achieving the effect of beautifying the building. However, correspondingly, there will be a certain loss in the light transmittance of colored photovoltaic modules. Currently, photovoltaic hollow modules mainly include crystalline silicon cell hollow modules with poor light transmission effect and thin-film cell hollow modules with better light transmittance.

[0003] Generally speaking, in positions where the requirement for light transmittance in buildings is not high, such as the spandrel wall and the wall between floors, crystalline silicon cell hollow modules with poor light transmission effect can be used. While for positions with certain light transmittance requirements, such as windows, roofs, etc., only thin-film cell hollow modules can be used to ensure the light transmittance.

[0004] However, the power generation efficiency of thin-film solar cell hollow modules is relatively lower than that of crystalline silicon solar cell hollow modules. The floor area occupied by low-efficiency thin-film solar cell hollow modules will affect the power generation amount and the return on investment; while currently, crystalline silicon solar cell hollow modules usually have poor light transmission effect, reducing the human experience inside the building. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a photovoltaic hollow module that can take into account light transmittance while having high power generation.

[0006] The photovoltaic hollow module provided by the utility model includes a superposed battery structure and a hollow glass structure. The battery structure successively includes a front plate glass, an adhesive layer, a battery cell layer arranged in the adhesive layer, and an intermediate layer glass. The battery cell layer includes a low-transmittance area and a light-transmitting area. Crystalline silicon cells are arranged in the low-transmittance area, and thin-film cells are arranged in the light-transmitting area.

[0007] Further, the light transmittance of the thin-film cell is in the range of 20% - 40%.

[0008] Further, the adhesive layer is formed by melting an upper adhesive film arranged on the side of the battery cell layer close to the front plate glass and a lower adhesive film arranged on the side close to the intermediate layer glass.

[0009] Further, the lower adhesive film includes a first lower adhesive film area corresponding to the low-transmittance area and a second lower adhesive film area corresponding to the light-transmitting area; the film thickness of the second lower adhesive film area is greater than the film thickness of the first lower adhesive film area.

[0010] Further, the first lower glue film area uses a black glue film with a thickness of 3.14 mm - 6.04 mm; the second lower glue film area uses a transparent glue film with a thickness of 1.14 mm - 3.04 mm.

[0011] Further, the insulating glass structure includes a back plate glass and a hollow layer between the back plate glass and the intermediate layer glass, and the hollow layer includes an inflated layer sealed using a spacer and a sealant.

[0012] Further, the spacer is an aluminum spacer filled with molecular sieve, the top and bottom ends of the spacer are sealed using a first sealant, and the periphery of the spacer and the first sealant is sealed using a second sealant;

[0013] Further, the first sealant is butyl rubber; the second sealant is silicone sealant, polyurethane sealant or polysulfide sealant.

[0014] Further, the front plate glass uses colored glass, and the original sheet of the colored glass includes ultra-clear tempered glass.

[0015] Further, the photovoltaic insulating component further includes a junction box, and the junction box is arranged at the outer edge of the photovoltaic insulating component.

[0016] The present utility model provides a photovoltaic insulating component. By combining crystalline silicon solar cells and thin film solar cells, the crystalline silicon solar cells provide high-efficiency photovoltaic conversion performance, ensuring the power generation of the overall component; while the thin film solar cells take into account the light transmittance, enabling the component to provide a good natural lighting effect during application, thereby achieving the purpose of both energy conservation and aesthetics.

[0017] Further, the design of the hollow layer in the component structure significantly improves its heat insulation and heat preservation performance, effectively enhancing the energy conservation effect of the building; at the same time, the multi-layer encapsulation and sealing measures inside the component ensure the stability and durability of the photovoltaic component during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a vertical sectional structure schematic diagram of Embodiment 1 of the present utility model.

[0019] Figure 2 It is a top view structure schematic diagram of Embodiment 1.

[0020] Figure 3 It is a top view structure schematic diagram of Embodiment 2 of the present utility model.

[0021] Figure 4 It is a top view structure schematic diagram of Embodiment 3 of the present utility model.

[0022] Icons: front plate glass 1, upper adhesive film 2, battery cell layer 3, crystalline silicon battery cell 31, thin film battery cell 32, lower adhesive film 4, first lower adhesive film area 41, second lower adhesive film area 42, intermediate layer glass 5, hollow layer 6, inflation layer 61, spacer 62, first sealant 63, second sealant 64, back plate glass 7, junction box 8. Detailed implementation mode

[0023] Next, the related technical solutions will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] As Figure 1 shown, for the photovoltaic hollow component disclosed in the first embodiment, when viewed from the light-receiving surface, each part is arranged in the following order: front plate glass 1, upper adhesive film 2, battery cell layer 3, lower adhesive film 4, intermediate layer glass 5, hollow layer 6, and back plate glass 7. The front plate glass 1, upper adhesive film 2, battery cell layer 3, lower adhesive film 4, and intermediate layer glass 5 are sequentially laminated to form a battery structure; the hollow layer 6 and the back plate glass 7 form a hollow glass structure.

[0025] The front plate glass 1 is selected as colored glass, and the original sheet of colored glass is preferably ultra-white tempered glass to improve the light transmittance and aesthetics of the component.

[0026] The upper adhesive film 2 is disposed between the battery cell layer 3 and the front plate glass 1 and is used to bond the battery cell layer 3 and the front plate glass 1. Preferably, a PVB adhesive film or an SGP adhesive film is used.

[0027] As Figure 2 shown, the battery cell layer 3 includes a low-transmittance area and a light-transmitting area arranged in parallel. The low-transmittance area is provided with crystalline silicon battery cells 31, and the light-transmitting area is provided with thin film battery cells 32.

[0028] The crystalline silicon battery cells 31 are preferably high-efficiency solar battery cells such as PERC (passivated emitter rear contact cell), HJT (heterojunction cell), TOPCon (tunnel oxide passivated contact cell), etc. Due to their high photoelectric conversion efficiency, these battery cells can significantly increase the power generation of the photovoltaic hollow component.

[0029] The thin film battery cells 32 are preferably made of materials such as cadmium telluride, copper indium gallium selenide (CIGS), and perovskite. Due to the good light transmittance of the thin film battery cells, the component can maintain a good light transmittance effect when applied to the light-transmitting parts such as the windows or roofs of buildings. The light transmittance of the thin film battery cells can be selected according to actual needs, preferably 20%, 30%, 40%, etc.

[0030] The lower adhesive film 4 is disposed between the cell layer 3 and the middle glass 5 and is used to bond the cell layer 3 and the middle glass 1. The lower adhesive film includes a first lower adhesive film region corresponding to the low-transmittance region and a second lower adhesive film region corresponding to the light-transmitting region;

[0031] The first lower adhesive film region 41 uses a black adhesive film with a thickness of 3.14 mm - 6.04 mm.

[0032] The second lower adhesive film region 42 uses a transparent adhesive film with a thickness of 1.14 mm - 3.04 mm.

[0033] The middle glass 5 is made of high-quality colored glass material, preferably ultra-clear tempered glass, to improve the heat preservation effect and optical performance.

[0034] It should be noted that after the front plate glass 1, the upper adhesive film 2, the cell layer 3, the lower adhesive film 4, and the middle glass 5 are laminated, the upper adhesive film 2 and the lower adhesive film 4 are melted to form an adhesive layer, and the cell layer 3 is located in the adhesive layer.

[0035] The hollow layer 6 is used to improve the heat insulation performance and heat preservation effect of the module, and includes an inflation layer 61, a spacer 62, a first sealant 63, and a second sealant 64.

[0036] The inflation layer 61 is filled with air, nitrogen, argon, or vacuum according to actual needs to improve the heat preservation performance of the hollow layer 6.

[0037] The spacer 62 is preferably an aluminum spacer or a warm-edge spacer filled with molecular sieve to prevent condensation water from generating inside the hollow layer.

[0038] As Figure 1 shown, the top and bottom ends of the spacer 62 are sealed with the first sealant 63. Specifically, the top end of the spacer 62 is the side close to the middle glass 5, and the bottom end of the spacer 62 is the side close to the back plate glass 7.

[0039] The first sealant 63 is preferably butyl rubber, which is used to initially seal the hollow layer to ensure its sealing performance.

[0040] The periphery of the spacer 62 and the first sealant 63 is sealed with the second sealant 64. The second sealant is provided to enhance the sealing effect, and the second sealant is preferably silicone sealant, polyurethane sealant, or polysulfide sealant.

[0041] The back plate glass 7 is located on the side of the hollow layer 6 away from the battery structure, and the edge position of the back plate glass 7 is bonded to the first sealant 63 and the second sealant 64. The back plate glass 3 is preferably ultra-clear tempered glass or ultra-clear tempered LOW-E glass, which is used to further enhance the light transmittance of the photovoltaic hollow module.

[0042] The junction box 8 is arranged on the outer edge of the photovoltaic hollow module. The setting of the junction box facilitates electrical connection and installation and maintenance. The type of the junction box is not limited to the side junction box described in this embodiment, and can also be adjusted according to needs.

[0043] As Figure 3 shown, Embodiment 2 discloses another photovoltaic hollow module. The difference between this embodiment and Embodiment 1 is that: both sides of the cell layer 3 in this embodiment are low-transmittance regions, and crystalline silicon cells 31 are arranged in the low-transmittance regions; the middle position of the cell layer 3 is a light-transmitting region, and thin-film cells 32 are arranged in the light-transmitting region. This embodiment is more suitable for situations where the requirement for light transmittance is not high, and higher photoelectric conversion efficiency and more power generation are needed.

[0044] As Figure 4 shown, Embodiment 3 also discloses a photovoltaic hollow module. The difference between this embodiment and Embodiment 1 is that: the middle position of the cell layer 3 in this embodiment is a low-transmittance region, and crystalline silicon cells 31 are arranged in the low-transmittance region; both sides of the cell layer 3 relative to the low-transmittance region are light-transmitting regions, and thin-film cells 32 are arranged in the light-transmitting regions. This embodiment is more suitable for situations where the requirement for light transmittance is relatively high and the requirement for photoelectric conversion efficiency is not high.

[0045] It should be noted that the division method of the low-transmittance region and the light-transmitting region in the cell layer 3 can be flexibly configured according to the actual application scenario. It can be arranged side by side according to the rules of the above embodiments, or arranged in a special shape according to the actual application requirements, which is not limited here.

[0046] Finally, it should be noted that: the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the above embodiments have been described in detail, those skilled in the art can still modify the technical solutions described in the above embodiments, or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A photovoltaic hollow component, comprising a stacked battery structure and a hollow glass structure, wherein the battery structure sequentially includes a front plate glass, an adhesive layer, a battery cell layer disposed in the adhesive layer, and an intermediate layer glass; characterized in that: The cell layer includes a low-transmittance region and a light-transmitting region. Crystalline silicon cells are disposed in the low-transmittance region, and thin-film cells are disposed in the light-transmitting region.

2. The photovoltaic hollow component according to claim 1, wherein: The transmittance of the thin-film cells ranges from 20% to 40%.

3. The photovoltaic hollow component according to claim 1, characterized in that: The adhesive layer is formed by melting an upper adhesive film disposed on the side of the cell layer close to the front plate glass and a lower adhesive film disposed on the side close to the intermediate layer glass.

4. The photovoltaic hollow component according to claim 3, wherein: The lower adhesive film includes a first lower adhesive film region corresponding to the low-transmittance region and a second lower adhesive film region corresponding to the light-transmitting region; the film thickness of the second lower adhesive film region is greater than that of the first lower adhesive film region.

5. The photovoltaic hollow component according to claim 4, characterized in that: The first lower adhesive film region uses a black adhesive film with a thickness of 3.14 mm - 6.04 mm; the second lower adhesive film region uses a transparent adhesive film with a thickness of 1.14 mm - 3.04 mm.

6. The photovoltaic hollow component according to claim 1, wherein: The insulating glass structure includes a back plate glass and an insulating layer between the back plate glass and the intermediate layer glass. The insulating layer includes an inflated layer sealed with a spacer bar and a sealant.

7. The photovoltaic hollow component according to claim 6, wherein: The spacer bar is an aluminum spacer bar filled with molecular sieve. The top and bottom ends of the spacer bar are sealed with a first sealant, and the periphery of the spacer bar and the first sealant is sealed with a second sealant.

8. The photovoltaic hollow component according to claim 7, wherein: The first sealant is butyl rubber; the second sealant is silicone sealant, polyurethane sealant or polysulfide sealant.

9. The photovoltaic hollow component according to any one of claims 1-8, characterized in that: The front plate glass uses colored glass, and the original sheet of the colored glass includes ultra-clear tempered glass.

10. The photovoltaic hollow component according to any one of claims 1-8, characterized in that: The photovoltaic insulating module further includes a junction box, and the junction box is disposed on the outer edge of the photovoltaic insulating module.

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