Cylindrical photovoltaic cell packaging structure

Abstract

A cylindrical photovoltaic cell packaging structure comprises a transparent sleeve and a circular-tube-shaped photovoltaic module. The circular-tube-shaped photovoltaic assembly is configured in the transparent sleeve in a manner that a flexible photovoltaic assembly is curled. The flexible photovoltaic module comprises a light-transmitting plastic substrate, a lower conductive layer, a photovoltaic layer, an upper conductive layer and an electrode lead. The lower conducting layer is arranged on the side face of the light-transmitting plastic substrate. The photovoltaic layer is arranged on the side face of the lower conductive layer. The upper conductive layer is arranged on the side surface of the photovoltaic layer and is electrically connected with the lower conductive layer. The electrode wires are electrically connected with the lower conductive layer or the upper conductive layer. A supporting body does not need to be additionally arranged in the transparent sleeve to support the circular-tube-shaped photovoltaic assembly to be close to the inner layer of the transparent sleeve, so that the structure is light, and the non-sunlight side face of the cylindrical photovoltaic cell can still receive indoor light to provide a photoelectric conversion function for supplying power to the interior of a room.

Description

Technical Field

[0001] The present application relates to a photovoltaic cell, and in particular to a cylindrical photovoltaic cell packaging structure. Background Art

[0002] The research of solar cells is a highly anticipated direction in renewable energy. Although most commercial products today use silicon as their main material, organic solar cells developed using polymer materials have attracted attention from the industry and academia due to their simple manufacturing process, low cost, light material, and flexibility.

[0003] At present, when preparing organic solar cells, coating is used as a technical means to prepare solar cell films. Its advantage is that it can make the film have better flatness and uniformity. Furthermore, the R2R process is a technology with the potential to be used for large-area preparation of organic solar cells, which can produce these solar cells with advantages such as plasticity, light weight, and impact resistance at a lower cost.

[0004] Referring to US Patent No. US7235736, a non-planar cylindrical photovoltaic structure is provided to allow more light-receiving area after the sunlight is displaced. Further referring to US Publication No. US2005 / 0098202A1 and US Patent No. US10978994B2, a flexible photovoltaic cell is installed in a circular transparent column. In application, the above-mentioned cylindrical photovoltaic cell structure in strip shape can be arranged in parallel.

[0005] However, the above technology still requires a central column to be set in the transparent column to support the photovoltaic module layer, so that the light-receiving surface of the photovoltaic module layer can be closer to the inner wall of the transparent column to increase the light-receiving surface. In addition, from the diagrams provided in the above patent cases, it can be seen that the photovoltaic modules in the light column are mostly only set in the upper half of the cross-section of the transparent column.

[0006] Since the photoelectric conversion capability of thin-film photovoltaic modules developed in recent years is no longer limited to full-day sunlight, photovoltaic modules can still achieve photoelectric conversion effects even in weak light (rainy days or indoor light). In addition, cylindrical photovoltaic structures are mostly used in outdoor ceiling applications, and lightweight structures are also an application requirement for related products. Therefore, there is still room for improvement in existing cylindrical photovoltaic cells.

[0007] Therefore, the applicant has felt the limitation of the above structural technology, and based on years of relevant experience in this field, careful observation and research, and application of theory, has proposed a reasonable and effective application. Utility Model Content

[0008] Therefore, the main purpose of the present application is to provide a novel cylindrical photovoltaic cell packaging structure, which does not require an additional support body to support the cylindrical photovoltaic component in a transparent casing to be close to the inner layer of the transparent casing, thereby reducing the weight of the structure and making the structure lightweight. Moreover, when the non-sunlight side of the cylindrical photovoltaic cell faces the indoor room, it can still receive indoor light to provide photoelectric conversion function and provide power.

[0009] In order to achieve the above-mentioned purpose, the present application provides a cylindrical photovoltaic cell packaging structure, comprising: a transparent sleeve and a circular tubular photovoltaic component. The circular tubular photovoltaic component is formed by curling a flexible photovoltaic component and is arranged inside the transparent sleeve. The flexible photovoltaic component comprises: a light-transmitting plastic substrate, a lower conductive layer, a photovoltaic layer, an upper conductive layer and an electrode wire. The lower conductive layer is arranged on the side of the light-transmitting plastic substrate, and the lower conductive layer is composed of a plurality of lower electrode circuits. The photovoltaic layer is composed of a plurality of photovoltaic units, and the plurality of photovoltaic units are arranged on a plurality of lower electrode circuits, so that a gap is formed between each photovoltaic unit. The upper conductive layer is composed of a plurality of upper electrode circuits, and the plurality of upper electrode circuits are arranged on the sides of the plurality of photovoltaic units and are electrically connected to the plurality of lower electrode circuits. The electrode wire is electrically connected to the lower conductive layer or the upper conductive layer.

[0010] In one embodiment of the present application, both ends of the transparent sleeve are sealed, and the interior of the transparent sleeve is filled with vacuum, nitrogen or inert gas.

[0011] In one embodiment of the present application, the R angle of the circular tubular photovoltaic module is greater than 10 mm.

[0012] In one embodiment of the present application, the ratio of the outer diameter of the circular tubular photovoltaic module to the inner diameter of the transparent sleeve is greater than 0.7 times and less than 1.2 times.

[0013] In one embodiment of the present application, the outer diameter of the circular tubular photovoltaic module is 85 mm, and the inner diameter of the transparent sleeve is 100 mm.

[0014] In one embodiment of the present application, the area of ​​the photovoltaic layer is at least 50% greater than the inner area of ​​the transparent sleeve.

[0015] In one embodiment of the present application, the thickness of the flexible photovoltaic component is 0.1 μm to 500 μm.

[0016] In one embodiment of the present application, the thickness of the flexible photovoltaic component is 10 μm to 150 μm.

[0017] In one embodiment of the present application, the photovoltaic layer is an organic solar cell, a copper indium gallium selenide thin film solar cell, a cadmium tin oxide thin film solar cell, a silicon thin film solar cell, a perovskite thin film solar cell or a dye-sensitized solar cell.

[0018] In one embodiment of the present application, a plurality of photovoltaic units are stacked in sequence by an electron transport layer, an active layer, and a hole transport layer.

[0019] In one embodiment of the present application, a plurality of photovoltaic units are stacked in sequence by a hole transport layer, an active layer, and an electron transport layer.

[0020] In one embodiment of the present application, the circular tubular photovoltaic component is curled and bent and placed inside a transparent casing, so that the light-transmitting plastic substrate is adjacent to the transparent casing and the photovoltaic layer faces inward.

[0021] In one embodiment of the present application, a protective layer is provided on the upper conductive layer, and the circular tubular photovoltaic assembly is placed inside the transparent sleeve so that the transparent plastic substrate is adjacent to the transparent sleeve, the photovoltaic layer faces inward, and the protective layer is provided on the photovoltaic layer and the upper conductive layer.

[0022] In one embodiment of the present application, an upper protective layer is provided on the side of the upper conductive layer, and a lower protective layer is provided on the side of the light-transmitting plastic substrate. The circular tubular photovoltaic component is placed inside a transparent casing so that the light-transmitting plastic substrate and the lower protective layer are adjacent to the inner layer of the transparent casing, the photovoltaic layer faces inward, and the upper protective layer is provided above the photovoltaic layer and the upper conductive layer.

[0023] In one embodiment of the present application, the circular tubular photovoltaic component is formed by stacking multiple layers of flexible photovoltaic components. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional schematic diagram of the appearance of the cylindrical photovoltaic cell packaging structure of the present application;

[0025] Figure 2 This is a schematic diagram of the unfolded flexible photovoltaic module of this application;

[0026] Figure 3 for Figure 2 A partial enlarged schematic diagram of a photovoltaic layer on a flexible photovoltaic module;

[0027] Figure 4 for Figure 2 A schematic side view of a flexible photovoltaic module;

[0028] Figure 5 for Figure 2 A side view of another flexible photovoltaic module.

[0029] Figure 6 for Figure 2 Schematic diagram of a flexible photovoltaic module that is rolled up and bent into a circular tubular photovoltaic module;

[0030] Figure 7 for Figure 4 Schematic diagram of a flexible photovoltaic module placed inside a transparent casing;

[0031] Figure 8 for Figure 5 Schematic diagram of a flexible photovoltaic module placed inside a transparent casing;

[0032] Fig. 9 This is a schematic diagram of the first usage state of this application;

[0033] Fig.10 This is a schematic diagram of the second usage state of this application.

[0034] Description of reference numerals:

[0035] 100: transparent casing;

[0036] 101: outdoor light exposure surface;

[0037] 102: Indoor light exposure surface;

[0038] 200: Circular tube photovoltaic module;

[0039] 210: flexible photovoltaic module;

[0040] 211: light-transmitting plastic substrate;

[0041] 212: lower conductive layer;

[0042] 2121: lower electrode circuit;

[0043] 213: photovoltaic layer;

[0044] 2131: Photovoltaic unit;

[0045] 2131a: electron transport layer;

[0046] 2131b: active layer;

[0047] 2131c: hole transport layer;

[0048] 214: gap;

[0049] 215: upper conductive layer;

[0050] 2151: upper electrode circuit;

[0051] 216: electrode wire;

[0052] 217: protective layer;

[0053] 300: ceiling;

[0054] 400: Sun;

[0055] 500: Lighting equipment. DETAILED DESCRIPTION

[0056] The technical content and detailed description of this application are described as follows with reference to the accompanying drawings:

[0057] See also Figure 1 , a three-dimensional schematic diagram of the appearance of the cylindrical photovoltaic cell packaging structure of the present application. As shown in the figure: the cylindrical photovoltaic cell packaging structure of the present application includes: a transparent sleeve 100 and a tubular photovoltaic component 200. Among them, the tubular photovoltaic component 200 is formed by curling the flexible photovoltaic component 210, and the tubular photovoltaic component 200 formed by curling the flexible photovoltaic component 210 can be accommodated in the transparent sleeve 100, and the flexible photovoltaic component 210 has a photovoltaic layer 213, and the photovoltaic layer 213 is electrically connected to an electrode wire (flat cable) 216, and the electrode wire 216 extends outside the transparent sleeve 100, and the electrode wire 216 can be electrically connected to an external electronic device (not shown) for use.

[0058] The two ends of the transparent sleeve 100 are sealed and packaged, and the transparent sleeve 100 may be filled with vacuum, nitrogen or inert gas.

[0059] The outer diameter of the flexible photovoltaic module 210 rolled into a circular tube photovoltaic module 200 is greater than 0.7 times to less than 1.2 times the inner diameter of the transparent sleeve 100. The area of ​​the photovoltaic layer 213 is at least 50% greater than the inner area of ​​the transparent sleeve 100.

[0060] See also Figures 2 to 4 , the flexible photovoltaic module of the present application is unfolded, Figure 2 A partial enlargement of the photovoltaic layer on the flexible photovoltaic module Figure 2 As shown in the figure, the flexible photovoltaic component 210 of the present application includes: a light-transmitting plastic substrate 211, a lower conductive layer 212, a photovoltaic layer 213, an upper conductive layer 215 and an electrode conductor 216.

[0061] When the flexible photovoltaic component 210 is manufactured, a light-transmitting plastic substrate 211 is first prepared. The light-transmitting plastic substrate 211 is polyimide (PI), a hybrid PI, polyethylene terephthalate (PET), polyethers Ulfone (PES), polyethylene naphthalate (PEN) or cycloolefin polymer (COP). The light-transmitting plastic substrate 211 selected in this application is but not limited to polyethylene terephthalate (PET).

[0062] Next, a lower conductive layer 212 is formed on the light-transmitting plastic substrate 211. The lower conductive layer 212 can be formed into a plurality of transparent lower electrode lines 2121 by etching technology containing inorganic conductive materials. In the present figure, the inorganic conductive material is indium tin oxide (ITO) or silver paste. The present application selects but is not limited to indium tin oxide ITO.

[0063] Next, a photovoltaic layer 213 is fabricated on the side of the lower conductive layer 212. The photovoltaic layer 213 is composed of a plurality of photovoltaic units 2131. The plurality of photovoltaic units 2131 are arranged on the side of the plurality of lower electrode lines 2121, so that there are gaps 214 between the plurality of photovoltaic units 2131. The plurality of photovoltaic units 2131 are sequentially composed of a stacked structure of an electron transfer layer 2131a, an active layer 2131b and a hole transfer layer 2131c, or sequentially composed of a stacked structure of a hole transfer layer 2131c, an active layer 2131b and an electron transfer layer 2131a. The photovoltaic layer 213 is an organic solar cell, a copper indium gallium selenide (CIGS) thin film solar cell, a cadmium tetroxide (CdTe) thin film solar cell, a silicon (α-Si) thin film solar cell, a perovskite thin film solar cell or a dye-sensitized solar cell (DSSC).

[0064] Next, an upper conductive layer 215 is formed on the side of the plurality of photovoltaic units 2131 and electrically connected to the lower conductive layer 212. The upper conductive layer 215 may be formed by evaporating, sputtering or coating an inorganic conductive material and then etching to form a plurality of transparent upper electrode lines 2151. In this figure, the inorganic conductive material is aluminum or silver.

[0065] Finally, the electrode conductor 216 is manufactured. The electrode conductor 216 is a flexible flat cable (FPC) or is printed on the side of the light-transmitting plastic substrate 211 with copper foil, copper wire or silver glue, and is electrically connected to the lower conductive layer 212 or the upper conductive layer 215. In this way, a semi-finished flexible photovoltaic component is completed. The semi-finished flexible photovoltaic component and the electrode conductor 216 are electrically connected to complete the production of the flexible photovoltaic component 210. The thickness of the flexible photovoltaic component 210 is 0.1μm to 500μm. The thickness of the flexible photovoltaic component 210 is 10μm to 150μm.

[0066] See also Figure 5 ,for Figure 2 Another side view schematic diagram of a flexible photovoltaic module. As shown in the figure: Figures 2 to 4The difference is that a protective layer 217 (or packaging layer, or water- and gas-blocking layer) is formed on the upper conductive layer 215 to block water and gas, so that the flexible photovoltaic component 210 is not affected by water vapor and becomes disabled.

[0067] See also Figure 6 , 7 ,for Figure 2 The flexible photovoltaic module is rolled and bent into a circular tubular photovoltaic module and Figure 4 Schematic diagram of placing a flexible photovoltaic component inside a transparent casing. As shown in the figure: after the flexible photovoltaic component 210 is curled and bent to form a circular tubular photovoltaic component 200, the R angle of the circular tubular photovoltaic component 200 is greater than 10 mm.

[0068] When the round tubular photovoltaic assembly 200 is curled and bent and placed inside the transparent sleeve 100, the light-transmitting plastic substrate 211 is arranged on the inner layer of the transparent sleeve 100, the light-transmitting plastic substrate 211 is adjacent to the inner layer of the transparent sleeve 100 outward, and the photovoltaic layer 213 is inward. Wherein, the ratio of the outer diameter of the round tubular photovoltaic assembly 200 to the inner diameter of the transparent sleeve 100 after the flexible photovoltaic assembly 210 is curled is greater than 0.7 times to less than 1.2 times. In this embodiment, the outer diameter of the round tubular photovoltaic assembly 200 is 85mm, and the inner diameter of the transparent sleeve 100 is 100mm. In this figure, the transparent sleeve 100 is plastic or glass. The transparent sleeve 100 in the embodiment of the present application is but not limited to glass. During the manufacturing process, one end of the two ends of the transparent sleeve 100 can be sealed first, or not sealed.

[0069] Moreover, the area of ​​the photovoltaic layer 213 is at least 50% larger than the inner area of ​​the transparent sleeve 100. When the circular tubular photovoltaic assembly 200 is placed inside the transparent sleeve 100, the electrode wire 216 electrically connected to the circular tubular photovoltaic assembly 200 is not limited to extending from one end of the transparent sleeve 100, but can also be distributed to extend from both ends of the transparent sleeve 100.

[0070] One end of the electrode wire 216 extends to the outside of the transparent sleeve 100, and then both ends of the transparent sleeve 100 are sealed. After the transparent sleeve 100 is packaged, the transparent sleeve 100 can be evacuated to less than 10-3torr, or filled with nitrogen or inert gas.

[0071] See also Figure 8 ,for Figure 5Schematic diagram of a flexible photovoltaic component placed inside a transparent casing. As shown in the figure: the flexible photovoltaic component 210 of the present application is packaged by attaching a protective layer (or encapsulation layer, water-blocking and gas-blocking layer) 217 ​​on the upper conductive layer 215 of the photovoltaic layer 213, and then the circular tubular photovoltaic component 200 is curled and bent. When the circular tubular photovoltaic component 200 is placed inside the transparent casing 100, the light-transmitting plastic substrate 211 is arranged on the inner layer of the transparent casing 100, the photovoltaic layer 213 faces inward, and the protective layer 217 is arranged on the photovoltaic layer 213 and the upper conductive layer 215 (the innermost layer).

[0072] It is worth mentioning that when the flexible photovoltaic component 210 is packaged, in addition to providing an upper protective layer (the same as the protective layer 217) on the side of the upper conductive layer 215 on the photovoltaic layer 213, a lower protective layer (the same as the protective layer 217) can also be provided on the side of the transparent plastic substrate 211. After packaging, the curled and bent tubular photovoltaic component 200 is placed inside the transparent sleeve 100, so that the upper protective layer is adjacent to the inner layer of the transparent sleeve 100, the photovoltaic layer 213 faces inward, and the upper protective layer is provided on the photovoltaic layer 213 and the upper conductive layer 215 (the innermost layer).

[0073] See also Fig. 9 , a schematic diagram of the first use state of the present application. As shown in the figure: Different from the known technology, the transparent sleeve 100 of the present application does not need to be provided with an additional support body to support the circular tubular photovoltaic assembly 200 to be close to the inner layer of the transparent sleeve 100, which can reduce the weight of the structure.

[0074] Moreover, after the circular tubular photovoltaic component 200 of the present application is configured inside the transparent sleeve 100, it is not limited to the upper half of the transparent sleeve 100 being the outdoor light irradiation surface 101, so that the circular tubular photovoltaic component 200 in the upper half of the transparent sleeve 100 only performs photoelectric conversion on outdoor light, and the lower half of the transparent sleeve 100 is the indoor light irradiation surface 102, so that the circular tubular photovoltaic component 200 in the lower half of the transparent sleeve 100 can also perform photoelectric conversion effects on light sources in non-outdoor areas.

[0075] See also Fig.10 , a schematic diagram of the second use state of the present application. As shown in the figure: the cylindrical photovoltaic cell manufactured by the present application can be connected in parallel with multiple cylindrical photovoltaic cells, and the electric energy collected by the photoelectric conversion can be collected through the parallel or series connection of the electrode wire 216 and electrically connected to the collector battery. For example, the cylindrical photovoltaic cell can be made and applied on the outdoor ceiling 300 to absorb the light of the sun 400 to light up the lighting equipment 500, which can replace the conventional photovoltaic panels, increase the lighting area, and also perform photoelectric conversion and power collection of various light sources during the day and night.

[0076] Furthermore, the circular tube-shaped photovoltaic component 200 may be a composite multi-layer flexible photovoltaic component structure formed by stacking multiple layers of packaged flexible photovoltaic components 210 .

[0077] However, the above is only a preferred embodiment of the present application and is not intended to limit the patent protection scope of the present application. Therefore, all equivalent changes made using the contents of the present application specification or drawings are also included in the scope of protection of the present application and are hereby stated.

Claims

1. A cylindrical photovoltaic cell packaging structure, characterized in that: Include: Transparent casing; The circular tube photovoltaic assembly is formed by rolling up the flexible photovoltaic assembly and is arranged inside the transparent sleeve. The flexible photovoltaic assembly includes: Light-transmitting plastic substrate; A lower conductive layer is disposed on the side of the light-transmitting plastic substrate, and the lower conductive layer is composed of a plurality of lower electrode circuits; A photovoltaic layer, comprising a plurality of photovoltaic units, wherein the plurality of photovoltaic units are arranged on the plurality of lower electrode lines so that a gap is formed between each of the photovoltaic units; An upper conductive layer, composed of a plurality of upper electrode circuits, the plurality of upper electrode circuits being disposed on the sides of the plurality of photovoltaic units and being electrically connected to the plurality of lower electrode circuits; and The electrode wire is electrically connected to the lower conductive layer or the upper conductive layer.

2. The cylindrical photovoltaic cell packaging structure according to claim 1, characterized in that: Both ends of the transparent sleeve are sealed, and the interior of the transparent sleeve is filled with vacuum, nitrogen or inert gas.

3. The cylindrical photovoltaic cell packaging structure according to claim 1, characterized in that: The R angle of the circular tubular photovoltaic module is greater than 10 mm.

4. The cylindrical photovoltaic cell packaging structure according to claim 1, characterized in that: The ratio of the outer diameter of the circular tubular photovoltaic component to the inner diameter of the transparent sleeve is greater than 0.7 times and less than 1.2 times.

5. The cylindrical photovoltaic cell packaging structure according to claim 1, characterized in that: The outer diameter of the circular tubular photovoltaic module is 85 mm, and the inner diameter of the transparent sleeve is 100 mm.

6. The cylindrical photovoltaic cell packaging structure according to claim 1, characterized in that: The area of ​​the photovoltaic layer is at least 50% greater than the inner area of ​​the transparent sleeve.

7. The cylindrical photovoltaic cell packaging structure according to claim 1, characterized in that: The thickness of the flexible photovoltaic component is 0.1 μm-500 μm.

8. The cylindrical photovoltaic cell packaging structure according to claim 7, characterized in that: The thickness of the flexible photovoltaic component is 10 μm-150 μm.

9. The cylindrical photovoltaic cell packaging structure according to claim 1, characterized in that: The photovoltaic layer is an organic solar cell, a copper indium gallium selenide thin film solar cell, a cadmium tin oxide thin film solar cell, a silicon thin film solar cell, a perovskite thin film solar cell or a dye-sensitized solar cell.

10. The cylindrical photovoltaic cell packaging structure according to claim 1, characterized in that: The plurality of photovoltaic units are stacked in sequence by an electron transfer layer, an active layer and a hole transfer layer.

11. The cylindrical photovoltaic cell packaging structure according to claim 1, characterized in that: The plurality of photovoltaic units are stacked in sequence by a hole transfer layer, an active layer and an electron transfer layer.

12. The cylindrical photovoltaic cell packaging structure according to claim 1, characterized in that: The circular tubular photovoltaic component is curled and bent and placed inside the transparent sleeve, so that the light-transmitting plastic substrate is adjacent to the inner layer of the transparent sleeve and the photovoltaic layer faces inward.

13. The cylindrical photovoltaic cell packaging structure according to claim 1, characterized in that: A protective layer is provided on the upper conductive layer. The circular tubular photovoltaic assembly is placed inside the transparent sleeve so that the transparent plastic substrate is adjacent to the transparent sleeve, the photovoltaic layer faces inward, and the protective layer is provided on the photovoltaic layer and the upper conductive layer.

14. The cylindrical photovoltaic cell packaging structure according to claim 1, characterized in that: An upper protective layer is provided on the side of the upper conductive layer, and a lower protective layer is provided on the side of the light-transmitting plastic substrate. The circular tubular photovoltaic component is placed inside the transparent sleeve so that the lower protective layer is adjacent to the inner layer of the transparent sleeve, the photovoltaic layer faces inward, and the upper protective layer is provided on the photovoltaic layer and the upper conductive layer.

15. The cylindrical photovoltaic cell packaging structure according to claim 1, characterized in that: The circular tube photovoltaic component is formed by stacking multiple layers of the flexible photovoltaic components.

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