Sidelight gain barrel-type photovoltaic module

Abstract

The invention provides a side light gain photovoltaic (power generation) barrel (type battery assembly). The side light gain photovoltaic (power generation) barrel (type battery assembly) comprises an upper wall with a double-sided photovoltaic battery layer and a side wall with light transmission; the upper wall and the side wall are combined to form a photovoltaic cylinder; sunlight which directly irradiates the side wall penetrates through the side wall and irradiates the back face of the double-face photovoltaic cell layer to generate electricity. The overall power generation efficiency is improved, and the cost per kilowatt-hour is reduced.

Description

Technical Field

[0001] The present application belongs to the field of photovoltaic power generation technology, and specifically relates to a photovoltaic module that can direct side light as backlight available to double-sided photovoltaic cells to improve photovoltaic power generation efficiency - a side-light gain tube-type photovoltaic module. Background Art

[0002] The applicant's prior application "Photovoltaic power generation method and photovoltaic power generation cable at high altitude on cultivated land (CN117792235B)" authorized a method and photovoltaic power generation cable at high altitude on cultivated land. It lays a photovoltaic cell layer on a load-bearing cable with high tensile strength to encapsulate a photovoltaic power generation cable, and erects the photovoltaic power generation cable above the cultivated land through a towering support. On the one hand, it absorbs the surplus solar energy in the sky to generate electricity, and on the other hand, it can also transport water for irrigation, so as to achieve the complementary development of agricultural production and photovoltaic power generation - agricultural and photovoltaic complementarity. It has a large span and few pile foundations, which can avoid serious interference with agricultural machinery operations. It overcomes many technical defects of existing agricultural and photovoltaic complementary technologies, such as large power generation fluctuations, difficulty in high-altitude erection, high installation costs, difficulty in cleaning and maintenance, short service life, and insufficient and effective exploitation of surplus solar energy resources above cultivated land. Another prior application of the applicant is "Suspension Photovoltaic Power Generation System and Photovoltaic Power Generation Cylinder (CN118316367A)", which is a linear photovoltaic cell assembly with a circular outer wall encapsulated - a photovoltaic power generation cylinder, which can be connected in series to form the "photovoltaic power generation cable" in CN117792235B.

[0003] However, during the implementation of production, it was found that the current flexible thin-film photovoltaic cells have not yet formed economies of scale, and their prices (about 1.65 yuan / watt) are unlikely to drop to the price level of single-crystal silicon photovoltaic panels (about 0.8 yuan / watt) within two to three years. Therefore, the photovoltaic tubes encapsulated with them will still have a high cost per kilowatt-hour of electricity (commonly known as the cost per kilowatt-hour) in recent years. Summary of the invention

[0004] The purpose of this application is to provide a side-light gain cylindrical photovoltaic module to improve the efficiency of photovoltaic power generation and reduce the cost per kilowatt-hour.

[0005] In order to achieve the above-mentioned purpose of the invention, the present application provides a side-light gain cylindrical photovoltaic module as follows.

[0006] The present application provides a side-light gain cylindrical photovoltaic component, characterized in that it includes an upper wall (including an inclined upper wall) having a double-sided photovoltaic cell layer, and a light-transmitting side wall; the upper wall and the side wall are combined into a (section of) cylindrical photovoltaic cell component - a photovoltaic cylinder; sunlight directly incident on the side wall passes through the side wall and is incident on (for example, refracted and / or reflected) the back side of the double-sided photovoltaic cell layer (on the upper wall), so that the back side of the double-sided photovoltaic cell layer receives sunlight (i.e., side light) from the side wall to generate electricity, thereby improving the overall power generation efficiency of the photovoltaic cylinder and reducing the cost per kilowatt-hour.

[0007] The double-sided photovoltaic cell layer described in this application can be a double-sided photovoltaic cell panel, double-sided photovoltaic cell power generation glass, double-sided photovoltaic cell film, double-sided photovoltaic cell sheet and other cell layers, which can receive sunlight from its front side (the side facing the sun) and can also receive reflected and scattered sunlight from its back side (the other side facing the ground), thereby improving the overall power generation efficiency. The higher the double-sided rate, the stronger the power generation capacity of the back side. The current double-sided photovoltaic cell panels and other cell layers are mature and commonly used photovoltaic cell products, and their double-sided rates have generally reached 70-90%, which will not be repeated here.

[0008] Preferably, the side-light gain tube-type photovoltaic assembly is characterized in that the photovoltaic tube is also provided with a lower wall, and the lower wall is provided with a reflective surface for reflecting sunlight from the side wall to the back side of the double-sided photovoltaic cell layer (on the upper wall).

[0009] Preferably, the side-light gain tube-type photovoltaic assembly is characterized in that: a plurality of photovoltaic tubes are connected end to end in series to form a photovoltaic power generation cable and suspended in the air. Of course, the photovoltaic tube can also be a narrow and long photovoltaic assembly, preferably a C-shaped open photovoltaic assembly, so that it is more suitable for use in ground power stations and other occasions where photovoltaic power generation is required.

[0010] It is also preferable that the left and right side walls are formed by the support rods and the windows (enclosed therein), and only the lower wall is retained, on which a (preferably diffuse) reflective surface is arranged. In other words, the side walls of the narrow and long photovoltaic module are formed by the support rods and the windows enclosed therein. It is preferable that the inclination angle φ2 of the reflective surface is smaller than the inclination angle φ1 of the double-sided photovoltaic cell panel, and the difference between the two inclination angles φ1-φ2 ​​is 1.5-41.5 degrees, preferably 1.5-25 degrees.

[0011] Preferably, the side-light gain tube-type photovoltaic assembly is characterized in that the cross-section of the photovoltaic tube is a circle, a polygonal column or other suitable geometric shapes.

[0012] Compared with the prior art, the present application has the following beneficial technical effects.

[0013] First, the sunlight that shines on the "semi-circular opaque outer wall 15" on the side of the photovoltaic tube in the prior application (CN118316367A) - side light, was originally going to be wasted, but this application collects the side light to generate electricity, avoiding waste and increasing profits.

[0014] Second, this application is applied to the "high-altitude photovoltaic power generation method for cultivated land and photovoltaic power generation cable (CN117792235B)", which can significantly improve the overall power generation efficiency and reduce the cost per kilowatt-hour. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the appearance of a side-light gain cylindrical photovoltaic module (circular) of the present application (Example 1).

[0016] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of a mid-side light gain cylindrical photovoltaic module.

[0017] Figure 3 This is a schematic diagram of the appearance of a side-light gain cylindrical photovoltaic module (hexagonal) of the present application (Example 2).

[0018] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure of a mid-side light gain cylindrical photovoltaic module.

[0019] Figure 5 This is a schematic diagram of the appearance of a side-light gain cylindrical photovoltaic module (triangular prism) of the present application (Example 3).

[0020] Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure of a mid-side light gain cylindrical photovoltaic module.

[0021] Figure 7 This is a schematic diagram of the appearance of a side-light gain cylindrical photovoltaic module (C-shape) of the present application (Example 4).

[0022] Figure 8 for Figure 7 A schematic diagram of the cross-sectional structure of a mid-side light gain cylindrical photovoltaic module.

[0023] Fig. 9 for Figure 7 Schematic diagram of the appearance of the side-light gain cylindrical photovoltaic module after adding support rods.

[0024] Fig.10 for Figure 7 Schematic diagram of another side-light gain cylindrical photovoltaic module.

[0025] Fig.11This is a schematic diagram of the cross-sectional structure of a side-light gain cylindrical photovoltaic module (figure eight) without a bottom wall.

[0026] Fig.12 This is a schematic diagram of the cross-sectional structure of a side-light gain cylindrical photovoltaic module (factory shape) with no bottom wall and a single side wall.

[0027] Explanation of the accompanying drawings: 1-photovoltaic tube, 2-side wall, 201-C-shaped opening, 202-window, 3-double-sided photovoltaic cell layer, 4-upper wall, 5-lower wall, 6-reflective surface, 7-end cover, 8-load-bearing cable, 9-connecting member, 10-connector, 11-sunlight, 12-support pole. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by this application easy to understand, this application is further explained below in conjunction with specific implementation methods.

[0029] In the description of the present application, it should be noted that the terms "upper", "lower", "side", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present application.

[0030] It should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "series", etc. should be understood in a broad sense. For example, "series" can mean electrical connection or direct connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] Embodiment 1.

[0032] like Figure 1 , Figure 2 As shown, some 210mm wide double-sided (heterojunction) photovoltaic cells are purchased and packaged into double-sided photovoltaic panels 3 with a width of 235mm, a length of 1200mm, and a bending radius of 112.5mm, which are used as double-sided photovoltaic cell layers. A batch of matte light-transmitting tubes with a diameter D (i.e., outer diameter) of 225mm are purchased. For example, matte light-transmitting tubes made of polytetrafluoroethylene material are used. Polytetrafluoroethylene material has excellent properties such as corrosion resistance, wear resistance, and high toughness. This polytetrafluoroethylene matte light-transmitting tube is commonly known as a frosted glass tube, which is a mature commercial product and will not be described here. Of course, it can also be various tubes made of matte light-transmitting materials such as quartz glass and acrylic. When needed, they can be customized or purchased from relevant manufacturers.

[0033] First, one third of the matte light-transmitting tube is dug out, and then the double-sided photovoltaic cell panel 3 is used to fill it as it is and used as the upper wall 4, so that the two can form a photovoltaic tube 1 with a light-transmitting side wall 2 (side light gain).

[0034] In order to apply the photovoltaic tube 1 to the applicant's prior application "High-altitude photovoltaic power generation method for cultivated land and photovoltaic power generation cable (CN117792235B)", so that it can be connected end to end to form a "photovoltaic power generation cable", it is desirable to add an upper end cover 7 and a connecting member 9 at both ends of the photovoltaic tube 1.

[0035] In this way, when the photovoltaic tubes 1 connected in series to form a "photovoltaic power generation cable" are suspended in the air along the north-south direction, the morning sunlight 11 will directly hit the front of the double-sided photovoltaic battery panel 3 from above, and will also diffuse (including refraction) from the east through the side wall 2 to the back of the double-sided photovoltaic battery panel 3. The afternoon sunlight 11 will directly hit the front of the double-sided photovoltaic battery panel 3 from above, and will also diffuse (including refraction) from the west through the side wall 2 to the back of the double-sided photovoltaic battery panel 3. In this way, the back of the double-sided photovoltaic battery panel 3 can obtain diffused side light power generation, thereby improving the overall power generation efficiency of the photovoltaic tube 1 and reducing the cost per kilowatt-hour.

[0036] In order to further collect and utilize the side light, a white matte paint can be applied to the inner side of the lower wall 5 to form a (diffuse) reflective surface 6 to reflect the sunlight 11 scattered on the lower wall 5 to the back of the double-sided photovoltaic cell panel 3, thereby further improving the power generation efficiency of the photovoltaic tube 1 and reducing the cost per kilowatt-hour. Tests show that the photovoltaic tube 1 in this example is a cylinder with an axisymmetric structure. No matter where the wind comes from, the resultant force of the wind will point to the axis, so no torque will be generated, making it easy to keep the photovoltaic tube 1 stable; and the overall power generation efficiency of the front and back sides of the double-sided photovoltaic cell panel 3 can reach more than 132% of the power generation efficiency of the front side of the double-sided photovoltaic cell panel 3.

[0037] Embodiment 2.

[0038] like Figure 3 , Figure 4 As shown, some 210mm wide double-sided photovoltaic cells are purchased and packaged into a 235mm wide and 1200mm long double-sided photovoltaic cell panel 3, which is used as a double-sided photovoltaic cell layer. A batch of matte light-transmitting hexagonal tubes with a width of 225mm are purchased. For example, matte light-transmitting hexagonal tubes made of polytetrafluoroethylene material are used. Polytetrafluoroethylene material has excellent properties such as corrosion resistance, wear resistance, and high toughness. This polytetrafluoroethylene matte light-transmitting hexagonal tube is commonly known as a frosted glass tube. It is a mature commercial product and will not be described here. Of course, it can also be various tubes made of matte light-transmitting materials such as quartz glass and acrylic. When needed, they can be ordered or purchased from the relevant manufacturers.

[0039] First, remove one edge directly above the matte light-transmitting hexagonal tube (i.e., remove one-sixth of the hexagonal tube), and then use the double-sided photovoltaic panel 3 to fill it up as it is, using it as the upper wall 4, so that the two can form a photovoltaic cylinder 1 with light-transmitting side walls 2 (hexagonal side-light gain). It can also be like Fig.11 shown, simplified into an inverted-V-shaped side-light gain cylindrical photovoltaic module without a lower wall 5. It can also be like Fig.12 shown, simplified into a "factory"-shaped side-light gain cylindrical photovoltaic module without a lower wall 5 and with a single side wall 2.

[0040] In order to apply the photovoltaic cylinder 1 to the applicant's prior application "Cultivated Land High-Altitude Photovoltaic Power Generation Method and Photovoltaic Power Generation Suspension Cable (CN117792235B)", a load-bearing cable 8 (not shown in the figure) can be used to connect its head and tail in series to form a "photovoltaic power generation suspension cable".

[0041] In this way, when the photovoltaic cylinders 1 connected in series to form a "photovoltaic power generation suspension cable" are hung in the air along the north-south direction, the morning sunlight 11 will directly shine on the front of the double-sided photovoltaic panel 3 from above, and will also diffusely reflect (including refraction) from the east through the side wall 2 to the back of the double-sided photovoltaic panel 3. The afternoon sunlight 11 will directly shine on the front of the double-sided photovoltaic panel 3 from above, and will also diffusely reflect (including refraction) from the west through the side wall 2 to the back of the double-sided photovoltaic panel 3. In this way, diffused side-light power generation can be obtained on the back of the double-sided photovoltaic panel 3, thereby improving the overall power generation efficiency of the photovoltaic cylinder 1 and reducing the cost per kilowatt-hour.

[0042] In order to further collect and utilize side light, it is achievable to apply a white matte coating on the inner side of the lower wall 5 to form a (diffuse) reflective surface 6 to reflect the light 11 scattered on the lower wall 5 to the back of the double-sided photovoltaic panel 3, thereby further improving the overall power generation efficiency of the photovoltaic cylinder 1 and reducing the cost per kilowatt-hour. Tests show that the overall power generation efficiency of the front and back sides of the double-sided photovoltaic panel 3 can reach more than 137% of the power generation efficiency of the front of the double-sided photovoltaic panel 3.

[0043] Example three.

[0044] As Figure 5 、 Figure 6As shown, some 210mm wide double-sided photovoltaic cells are purchased and packaged into a 235mm wide and 1200mm long double-sided photovoltaic cell panel 3, which is used as a double-sided photovoltaic cell layer. Another batch of matte light-transmitting V-grooves with a side length of 235mm are purchased. For example, matte light-transmitting V-grooves made of polytetrafluoroethylene material. Polytetrafluoroethylene material has excellent properties such as corrosion resistance, wear resistance, and high toughness. This polytetrafluoroethylene matte light-transmitting V-groove is a mature commercial product and will not be described here. Of course, it can also be various V-grooves made of matte light-transmitting materials such as quartz glass and acrylic. When needed, they can be ordered or purchased from the relevant manufacturers.

[0045] The notch of the matte light-transmitting V-shaped groove is inlaid with the double-sided photovoltaic cell panel 3 and used as the upper wall 4, so that the two can form a photovoltaic tube 1 with a light-transmitting side wall 2 (triangular side light gain).

[0046] In order to apply the photovoltaic tube 1 to the applicant's prior application "High-altitude photovoltaic power generation method for cultivated land and photovoltaic power generation cable (CN117792235B)", it can be connected end to end with a load-bearing cable 8 to form a "photovoltaic power generation cable" for use.

[0047] In this way, when the photovoltaic tube 1 connected in series to form a "photovoltaic power generation cable" is suspended in the air along the north-south direction for use, the morning sunlight 11 will directly hit the front of the double-sided photovoltaic panel 3 from above, and will also diffuse (including refraction) from the east through the side wall 2 to the back of the double-sided photovoltaic panel 3. The afternoon sunlight 11 will directly hit the front of the double-sided photovoltaic panel 3 from above, and will also diffuse (including refraction) from the west through the side wall 2 to the back of the double-sided photovoltaic panel 3. In this way, the back of the double-sided photovoltaic panel 3 can obtain diffused side light power generation, thereby improving the overall power generation efficiency of the photovoltaic tube 1 and reducing the cost of electricity. Tests show that the overall power generation efficiency of the front and back sides of the double-sided photovoltaic panel 3 can reach more than 128% of the power generation efficiency of the front side of the double-sided photovoltaic panel 3.

[0048] Embodiment 4.

[0049] like Figure 7 , Figure 8 As shown, some 210mm wide bifacial photovoltaic cells are purchased and packaged into bifacial photovoltaic panels 3 with a width of 1134mm and a length of 2384mm, which are used as bifacial photovoltaic cell layers. A batch of photovoltaic tubes 1 with C-shaped openings 201 are processed, i.e., C-type photovoltaic modules. The C-shaped openings 201 are used as invisible light-transmitting side walls 2, and the bifacial photovoltaic panels 3 are installed obliquely above the photovoltaic tubes 1 with the C-shaped openings 201, and used as the upper wall 4, so that the two can form a photovoltaic tube 1 with a side opening (side light gain), i.e., a C-type photovoltaic module.

[0050] In order to apply the C-type photovoltaic module to the applicant's prior application "High-altitude photovoltaic power generation method for cultivated land and photovoltaic power generation suspension cable (CN117792235B)", it can be suspended in the air using a load-bearing cable 8 (not shown).

[0051] In this way, when a C-type photovoltaic module is installed and used along an east-west direction and facing south, part of the sunlight 11 will directly hit the front of the double-sided photovoltaic panel 3 from above, and the other part will hit the lower wall 5 from the south (obliquely above) through the C-shaped opening 201 on the side (i.e., the invisible side wall 2), and then be reflected to the back of the double-sided photovoltaic panel 3 through the reflective surface 6 such as cheap aluminum-coated plastic plate, aluminum-coated glass, and aluminum foil. In this way, the back of the double-sided photovoltaic panel 3 can obtain side light power generation, thereby improving the overall power generation efficiency of the C-type photovoltaic module and reducing the cost of electricity. Tests show that the overall power generation efficiency of the front and back sides of the double-sided photovoltaic panel 3 can reach more than 138% of the power generation efficiency of the front side of the double-sided photovoltaic panel 3. This example solution can also be as follows Fig. 9 As shown, the upper support rod 12 is installed to form a narrow and long photovoltaic module, which is used in photovoltaic power generation occasions such as ground power stations and agricultural photovoltaic complementarity. Fig.10 As shown, the left and right side walls 2 are composed of the support rods 12 and the (enclosed) windows 202 and 201, and only the lower wall 5 is retained, and a reflective surface 6 is arranged on the lower wall 5. Preferably, the inclination angle φ2 of the reflective surface 6 is smaller than the inclination angle φ1 of the double-sided photovoltaic panel 3, and the difference φ1-φ2 ​​between the two inclination angles is 1.5-41.5 degrees, preferably 1.5-25 degrees.

[0052] What is disclosed above is only a preferred embodiment of the present application. The drawings are merely schematic structural diagrams and are not drawn according to the actual size ratio. They cannot be used to limit the scope of rights of the present application. Equivalent changes made based on the claims of the present application still fall within the scope covered by the present application.

Claims

1. A side-light gain cylindrical photovoltaic module, characterized in that: It includes an upper wall with a double-sided photovoltaic cell layer and a light-transmitting side wall; the upper wall and the side wall are combined into a cylindrical photovoltaic cell assembly - a photovoltaic tube; the sunlight directly hitting the side wall passes through the side wall and hits the back of the double-sided photovoltaic cell layer, so that the back of the double-sided photovoltaic cell layer receives the sunlight from the side wall to generate electricity, thereby improving the overall power generation efficiency of the photovoltaic tube and reducing the cost of electricity.

2. The side-light gain cylindrical photovoltaic module according to claim 1, characterized in that: The photovoltaic tube is also provided with a lower wall, and the lower wall is provided with a reflective surface for reflecting sunlight from the side wall to the back side of the double-sided photovoltaic cell layer.

3. The side-light gain cylindrical photovoltaic module according to claim 1 or 2, characterized in that: Multiple photovoltaic tubes are connected end to end to form a photovoltaic power generation cable and suspended in the air.

4. The side-light gain cylindrical photovoltaic module according to claim 1 or 2, characterized in that: The cross section of the photovoltaic tube is circular or polygonal.

5. The side-light gain cylindrical photovoltaic module according to claim 2, characterized in that: The photovoltaic tube is a long and narrow photovoltaic module.

6. The side-light gain cylindrical photovoltaic module according to claim 5, characterized in that: The narrow and long photovoltaic module is a C-shaped open photovoltaic module.

7. The side-light gain cylindrical photovoltaic module according to claim 5, characterized in that: The side wall of the long and narrow photovoltaic module is composed of supporting rods and windows surrounded by the supporting rods.

8. The side-light gain cylindrical photovoltaic module according to claim 5, characterized in that: The inclination angle φ2 of the reflective surface is smaller than the inclination angle φ1 of the double-sided photovoltaic cell panel, and the difference between the two inclination angles φ1-φ2 ​​is 1.5-41.5 degrees.

9. The side-light gain cylindrical photovoltaic module according to claim 8, characterized in that: The difference between the two inclination angles φ1-φ2 ​​is 1.5-25 degrees.

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