Wide-angle energy-collecting photovoltaic device

Abstract

The utility model discloses a wide-angle energy-collecting photovoltaic device, which comprises a double-sided photovoltaic cell assembly, an energy-collecting assembly and a support, the double-sided photovoltaic cell assembly and the energy-collecting assembly are both installed on the support, the energy-collecting assembly is located on the back side of the double-sided photovoltaic cell assembly, and the energy-collecting assembly comprises a plurality of micro-concave mirror units distributed on a fitting curved surface in an array mode. The center of the fitting curved surface is recessed towards one side away from the double-sided photovoltaic cell assembly, and an included angle is formed between an inner normal vector at the center of the fitting curved surface and a normal vector on the back surface of the double-sided photovoltaic cell assembly. The reflecting surface of the micro-concave mirror unit faces the double-sided photovoltaic cell assembly. The normal vector of the reflecting surface of the micro-concave mirror unit intersects with the inner normal vector at the center of the fitting curved surface. According to the utility model, light energy can be effectively collected to the back surface of the double-sided photovoltaic cell assembly, the light energy collection effect of each independent area can be improved, and the photovoltaic power generation performance is good.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaic power generation, in particular to a wide-angle energy-collecting photovoltaic device. Background Art

[0002] Photovoltaic devices, also known as photovoltaic power generation systems, refer to power generation systems that use the photovoltaic effect of photovoltaic cells to directly convert solar radiation energy into electrical energy. Photovoltaic cells are made of semiconductor materials, and crystalline silicon photovoltaic cells are the mainstream photovoltaic cells.

[0003] As people's environmental awareness continues to improve, the application of photovoltaic devices is becoming more and more extensive. In related technologies, the position of most photovoltaic devices after being set to the application scenario is fixed. Photovoltaic devices receive light energy through the front side of photovoltaic cells facing upward. Photovoltaic cells use the photoelectric effect to convert the received light energy into electrical energy. The existing photovoltaic devices can only receive limited light energy, and the energy utilization rate of photovoltaic power generation is low. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a wide-angle energy collection photovoltaic device, which can collect and utilize light energy at a larger receiving angle, and has a high energy utilization rate for photovoltaic power generation.

[0005] According to an embodiment of the utility model, a wide-angle energy-collecting photovoltaic device includes a double-sided photovoltaic cell assembly, an energy-collecting assembly and a bracket. The double-sided photovoltaic cell assembly and the energy-collecting assembly are both installed on the bracket. The energy-collecting assembly is located on the back side of the double-sided photovoltaic cell assembly. The energy-collecting assembly includes a plurality of micro-concave mirror units arrayed and distributed on a fitting surface. The center of the fitting surface is recessed toward a side away from the double-sided photovoltaic cell assembly. An angle α is formed between an inner normal vector at the center of the fitting surface and a normal vector on the back side of the double-sided photovoltaic cell assembly, α∈[90°,180°). The reflection surface of the micro-concave mirror unit faces the double-sided photovoltaic cell assembly, and the normal vector of the reflection surface of the micro-concave mirror unit intersects with the inner normal vector at the center of the fitting surface.

[0006] In this embodiment, the double-sided photovoltaic cell assembly includes a frame and a stacking group, the stacking group is fixed in the frame, and the stacking group includes a glass panel, a first light-transmitting adhesive layer, a double-sided photovoltaic cell sheet, a second light-transmitting adhesive layer and a glass back panel stacked in sequence.

[0007] In this embodiment, the bifacial photovoltaic cell sheet includes a plurality of bifacial photovoltaic cell units connected in series or in parallel.

[0008] In this embodiment, the energy collection assembly further includes a reflective frame. A reflective curved surface matching the fitting curved surface is provided on one side of the reflective frame close to the double-sided photovoltaic cell assembly, and all the micro-concave mirror units are mounted on the reflective frame.

[0009] In this embodiment, the micro concave mirror unit is a micro high-gloss aluminum concave mirror, and the reflection frame is a high-gloss aluminum frame.

[0010] In this embodiment, the bracket includes a support frame, a battery frame and an energy collecting seat. The battery frame is adjustably connected to the support frame, the energy collecting seat is adjustably connected to the support frame, the double-sided photovoltaic cell assembly is installed on the battery frame, and the energy collecting assembly is installed on the energy collecting seat.

[0011] In this embodiment, the support frame is provided with a first screw hole and a second screw hole, the bracket also includes a first screw and a second screw, the battery frame is provided with a first through hole, the energy collecting seat is provided with a second through hole, the battery frame and the energy collecting seat are both rotatably connected to the support frame, the first screw is passed through the first through hole and is threadedly connected to the first screw hole to fix the position of the battery frame relative to the support frame, and the second screw is passed through the second through hole and is threadedly connected to the second screw hole to fix the position of the energy collecting seat relative to the support frame.

[0012] In this embodiment, the front side of the bifacial photovoltaic cell assembly is tilted upward, α=90°.

[0013] The embodiments of the present invention have at least the following beneficial effects:

[0014] By setting a plurality of micro-concave mirror units distributed in an array on a fitting surface to collect light energy to the back of a double-sided photovoltaic cell module, and the center of the fitting surface is recessed toward a side away from the double-sided photovoltaic cell module, the reflecting surface formed by the combination of the micro-concave mirror units distributed in each array behind the fitting surface can effectively collect light energy to the back of the double-sided photovoltaic cell module, and the reflecting surface of each independent micro-concave mirror unit has independent light energy collection and convergence performance, which can improve the light energy collection effect of each independent area, and can improve the uniformity of energy distribution when light is collected to the back of the double-sided photovoltaic cell module, thereby making full use of the photovoltaic power generation capacity of each area of ​​the double-sided photovoltaic cell module, which can effectively improve The invention can improve the power generation performance of the double-sided photovoltaic cell module, and to a certain extent can keep the temperature of each area of ​​the double-sided photovoltaic cell module within a controllable range, thereby effectively extending the service life of the double-sided photovoltaic cell module, and an angle greater than or equal to 90 degrees is set between the inner normal vector at the center of the fitting surface and the normal vector on the back of the double-sided photovoltaic cell module, which can ensure that the light energy collected and utilized by the energy collection component and the light energy received by the front of the double-sided photovoltaic cell module come from different angles, which can effectively improve the utilization rate of the overall structure of the photovoltaic device for light energy from different angles, can improve the photovoltaic power generation of the photovoltaic device in a single cycle, has high energy utilization rate of light energy, and has good photovoltaic power generation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of a wide-angle energy collection photovoltaic device according to an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the wide-angle energy collection photovoltaic device of an embodiment of the utility model at another viewing angle;

[0018] Figure 3 It is a side view structural schematic diagram of a wide-angle energy collection photovoltaic device according to an embodiment of the utility model;

[0019] Figure 4 For along Figure 3 A-A' cross-sectional structural diagram;

[0020] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of B;

[0021] Figure 6 This is a schematic diagram of the main structure of a wide-angle energy collection photovoltaic device according to an embodiment of the utility model;

[0022] Figure 7 For along Figure 6 Schematic diagram of the cross-sectional structure of C-C'.

[0023] Reference numerals:

[0024] Bifacial photovoltaic cell assembly 1000, frame 1100, stacking group 1200, glass panel 1210, first light-transmitting adhesive layer 1220, bifacial photovoltaic cell sheet 1230, bifacial photovoltaic cell unit 1231, second light-transmitting adhesive layer 1240, glass back plate 1250;

[0025] Energy collection component 2000, micro concave mirror unit 2100, reflection frame 2200;

[0026] The bracket 3000 , the support frame 3100 , the first screw hole 3110 , the second screw hole 3120 , the battery frame 3200 , the first through hole 3210 , the energy collecting seat 3300 , the second through hole 3310 , the first screw 3400 , and the second screw 3500 . DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, left, right, front, back, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] Photovoltaic cells are made of semiconductor materials, and crystalline silicon photovoltaic cells are the mainstream photovoltaic cells. As people's environmental awareness continues to improve, the application of photovoltaic devices is becoming more and more extensive. In related technologies, the position of most photovoltaic devices after being set to the application scene is fixed. Photovoltaic devices receive light energy through the front side of the photovoltaic cell facing upward. Photovoltaic cells use the photoelectric effect to convert the received light energy into electrical energy. The existing photovoltaic devices can only receive limited light energy, and the energy utilization rate of photovoltaic power generation is low.

[0032] The following is the attached Figure 1 To Attachment Figure 7 , describing the wide-angle energy-collecting photovoltaic device of the embodiment of the utility model, which can collect and utilize light energy at a larger receiving angle, and the energy utilization rate of photovoltaic power generation is high.

[0033] Reference Figure 1 and Figure 7A wide-angle energy-collecting photovoltaic device of the present embodiment includes a bifacial photovoltaic cell assembly 1000, an energy-collecting assembly 2000, and a bracket 3000. The bifacial photovoltaic cell assembly 1000 and the energy-collecting assembly 2000 are both mounted on the bracket 3000. The bifacial photovoltaic cell assembly 1000 can generate electricity using light energy from the front and back sides. The energy-collecting assembly 2000 is located on the back side of the bifacial photovoltaic cell assembly 1000. The energy-collecting assembly 2000 includes a plurality of micro-concave mirror units 2100 arrayed and distributed on a fitting surface. The fitting surface includes a plurality of fitting curves. All the micro-concave mirror units 2100 are divided into a plurality of groups, each group The micro-concave mirror units 2100 are evenly distributed on the corresponding fitting curve, and each two adjacent micro-concave mirror units 2100 are connected by splicing. The center of the fitting surface is concave toward the side away from the double-sided photovoltaic cell module 1000, so that the structure composed of the micro-concave mirror units 2100 distributed on the fitting surface can collect light. An angle α is formed between the inner normal vector at the center of the fitting surface and the normal vector on the back of the double-sided photovoltaic cell module 1000. The inner normal vector at the center of the fitting surface refers to the inner normal vector at the center point of the fitting surface, α∈[90°,180°), which can ensure the fitting coincident with the fitting surface. The light energy received by the reflective surface and the front of the bifacial photovoltaic cell assembly 1000 comes from different incident angles. Each micro-concave mirror unit 2100 and the front of the bifacial photovoltaic cell assembly 1000 set based on the fitting surface can receive light energy from different angles, which can effectively improve the utilization rate of the overall photovoltaic device for light energy at different angles. The reflective surface of the micro-concave mirror unit 2100 faces the back of the bifacial photovoltaic cell assembly 1000, and the center point array of each micro-concave mirror unit 2100 is distributed on the fitting surface, and the reflective surface of each micro-concave mirror unit 2100 is located on the fitting surface close to the bifacial photovoltaic cell assembly 1 000, each normal vector of the reflecting surface of the micro-concave mirror unit 2100 intersects with the inner normal vector at the center of the fitting surface, which can ensure that the reflecting surface of the micro-concave mirror unit 2100 can effectively reflect and collect light to the back of the double-sided photovoltaic cell module 1000. The micro-concave mirror unit 2100 is used to reflect light that is different from the light incident on the front of the double-sided photovoltaic cell module 1000 to the back of the double-sided photovoltaic cell module 1000. The overall photovoltaic device has a large angle range for collecting and utilizing light. When the photovoltaic device is fixedly set, the photovoltaic power generation performance of a single cycle can be effectively improved. A single cycle usually refers to twenty-four hours a day.

[0034] By setting a plurality of micro-concave mirror units 2100 arrayed and distributed on the fitting surface to collect light energy to the back side of the double-sided photovoltaic cell assembly 1000, the center of the fitting surface is recessed toward the side away from the double-sided photovoltaic cell assembly 1000, so that the micro-concave mirror units 2100 arrayed and distributed behind the fitting surface can form a combined reflecting surface, which can effectively collect light energy to the back side of the double-sided photovoltaic cell assembly 1000, and the reflecting surface of each independent micro-concave mirror unit 2100 has independent light energy collection and convergence performance, which can improve the light energy collection effect of each independent area, and can improve the uniformity of energy distribution when the light is collected to the back side of the double-sided photovoltaic cell assembly 1000, thereby making full use of the photovoltaic generation capacity of each area of ​​the double-sided photovoltaic cell assembly 1000. The electric capacity can effectively improve the power generation performance of the double-sided photovoltaic cell assembly 1000, and to a certain extent can keep the temperature of each area of ​​the double-sided photovoltaic cell assembly 1000 within a controllable range, thereby effectively extending the service life of the double-sided photovoltaic cell assembly 1000; an angle greater than or equal to 90 degrees is set between the inner normal vector at the center of the fitting surface and the normal vector on the back of the double-sided photovoltaic cell assembly 1000, which can ensure that the light energy collected and utilized by the energy collection assembly 2000 and the light energy received by the front of the double-sided photovoltaic cell assembly 1000 come from different angles, which can effectively improve the utilization rate of the overall structure of the photovoltaic device for light energy from different angles, and can improve the photovoltaic power generation of the photovoltaic device in a single cycle. The energy utilization rate of light energy is high, and the photovoltaic power generation performance of the photovoltaic device is good.

[0035] It can be understood that the double-sided photovoltaic cell assembly 1000 includes a frame 1100 and a stacking group 1200, the stacking group 1200 is fixed in the frame 1100, and the frame 1100 and the stacking group 1200 are sealed by silicone glue or other glue. The stacking group 1200 includes a glass panel 1210, a first light-transmitting glue layer 1220, a double-sided photovoltaic cell 1230, a second light-transmitting glue layer 1240 and a glass backboard 1250 stacked in sequence, the first light-transmitting glue layer 1220 is used to bond the front side of the double-sided photovoltaic cell 1230 and the glass panel 1210, and the second light-transmitting glue layer 1240 is used to bond the back side of the photovoltaic cell and the glass backboard 1250.

[0036] Specifically, the glass panel 1210 and the glass back panel 1250 can both be set to tempered glass, and the first light-transmitting adhesive layer 1220 and the second light-transmitting adhesive layer 1240 can both be set to EVA adhesive film. EVA is the abbreviation of polyethylene-polyvinyl acetate copolymer. EVA adhesive film has good adhesion, durability and light transmittance.

[0037] It can be understood that the double-sided photovoltaic cell sheet 1230 includes a number of double-sided photovoltaic cell units 1231 connected in series or in parallel, and the corresponding double-sided photovoltaic cell units 1231 are connected in series or in parallel through interconnecting welding strips, and both sides of the double-sided photovoltaic cell unit 1231 can receive light energy to generate electricity. For example, n-PERT is a double-sided photovoltaic cell unit 1231, including a front electrode, a front anti-reflection film, a boron-doped emitter, n-type silicon, a phosphorus-doped back field, a back anti-reflection film and a back electrode, ensuring that the two opposite sides of the double-sided photovoltaic cell unit 1231 can receive light energy.

[0038] Specifically, the bifacial photovoltaic cell assembly 1000 further includes a junction box, which is used to connect the bifacial photovoltaic cell sheet 1230 via a busbar to realize the collection of current to the junction box.

[0039] It is understandable that the energy collection assembly 2000 further includes a reflection frame 2200, and a reflection curved surface parallel to and matching the fitting curved surface is provided on the side of the reflection frame 2200 close to the double-sided photovoltaic cell assembly 1000, and all the micro-concave mirror units 2100 are installed on the reflection frame 2200. The reflection curved surface of the reflection frame 2200 is used to cooperate with the reflection surface of the micro-concave mirror unit 2100 to form a complete and continuous special-shaped surface reflection structure, which can effectively ensure the effective utilization of light energy.

[0040] Specifically, the micro-concave mirror unit 2100 is a micro-high-gloss aluminum concave mirror, and the reflection frame 2200 is a high-gloss aluminum frame. High-gloss aluminum has good light reflection performance. The micro-concave mirror unit 2100 and the reflection frame 2200 made of high-gloss aluminum can ensure the energy collection effect of the energy collection component 2000 on light energy. A large number of micro-high-gloss aluminum concave mirrors are distributed along the fitting surface array and spliced ​​into an integrated structure of the energy collection component 2000 through the high-gloss aluminum frame. The structure of the energy collection component 2000 is stable and durable.

[0041] It can be understood that the bracket 3000 includes a support frame 3100, a battery frame 3200 and an energy collecting seat 3300. The battery frame 3200 is adjustably connected to the support frame 3100, and the energy collecting seat 3300 is adjustably connected to the support frame 3100. The double-sided photovoltaic cell assembly 1000 is installed on the battery frame 3200, and the energy collecting assembly 2000 is installed on the energy collecting seat 3300. By setting the bracket 3000 as an adjustable structure, the placement position of the double-sided photovoltaic cell assembly 1000 can be adjusted to adapt to corresponding environmental requirements by adjusting the relative position between the battery frame 3200 and the support frame 3100 according to different usage environments. Correspondingly, the placement position of the energy collecting seat 3300 can be adjusted to adapt to corresponding environmental requirements by adjusting the relative position between the energy collecting seat 3300 and the support frame 3100.

[0042] It can be understood that the support frame 3100 is provided with a first screw hole 3110 and a second screw hole 3120, the bracket 3000 also includes a first screw 3400 and a second screw 3500, the battery rack 3200 is provided with a first through hole 3210, and the energy collecting seat 3300 is provided with a second through hole 3310. The battery rack 3200 and the energy collecting seat 3300 are both rotatably connected to the support frame 3100, the first screw 3400 is passed through the first through hole 3210 and is threadedly connected to the first screw hole 3110 to fix the position of the battery rack 3200 relative to the support frame 3100, and the second screw 3500 is passed through the second through hole 3310 and is threadedly connected to the second screw hole 3120 to fix the position of the energy collecting seat 3300 relative to the support frame 3100.

[0043] During installation or maintenance, when it is necessary to adjust the position of the double-sided photovoltaic cell assembly 1000 through the battery rack 3200, loosen the first screw 3400 in the first screw hole 3110, rotate the battery rack 3200 to the target position, and tighten the first screw 3400 in the first screw hole 3110 to fix the position between the battery rack 3200 and the support frame 3100; when it is necessary to adjust the position of the energy collecting assembly 2000 through the energy collecting seat 3300, loosen the second screw 3500 in the second screw hole 3120, rotate the energy collecting seat 3300 to the target position, and tighten the second screw 3500 in the second screw hole 3120 to fix the position between the energy collecting seat 3300 and the support frame 3100.

[0044] It can be understood that the front side of the double-sided photovoltaic cell assembly 1000 is tilted upward, α=90°. By setting the front side of the double-sided photovoltaic cell assembly 1000 to be tilted upward to directly receive light energy for photovoltaic power generation, and setting the inner normal vector at the center of the fitting surface to form a right angle with the normal vector of the back side of the double-sided photovoltaic cell assembly 1000, the critical angle at which the front side of the double-sided photovoltaic cell assembly 1000 and the energy collecting assembly 2000 can be effectively increased. The photovoltaic device has a large receiving angle for light energy, can increase the amount of light energy received within a cycle, and can effectively increase the amount of photovoltaic power generation.

[0045] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A wide-angle energy collection photovoltaic device, characterized in that: The invention comprises a double-sided photovoltaic cell assembly (1000), an energy collection assembly (2000) and a bracket (3000), wherein the double-sided photovoltaic cell assembly (1000) and the energy collection assembly (2000) are both installed on the bracket (3000), the energy collection assembly (2000) is located on the back side of the double-sided photovoltaic cell assembly (1000), and the energy collection assembly (2000) comprises a plurality of micro-concave mirror units (2100) arranged in an array and distributed on a fitting curved surface. The center is concave toward a side away from the double-sided photovoltaic cell assembly (1000), an angle α is formed between the inner normal vector at the center of the fitting surface and the normal vector of the back side of the double-sided photovoltaic cell assembly (1000), α∈[90°,180°), the reflection surface of the micro-concave mirror unit (2100) faces the double-sided photovoltaic cell assembly (1000), and the normal vector of the reflection surface of the micro-concave mirror unit (2100) intersects with the inner normal vector at the center of the fitting surface.

2. A wide-angle energy collection photovoltaic device according to claim 1, characterized in that: The double-sided photovoltaic cell assembly (1000) comprises a frame (1100) and a stacking group (1200), wherein the stacking group (1200) is fixed in the frame (1100), and the stacking group (1200) comprises a glass panel (1210), a first light-transmitting adhesive layer (1220), a double-sided photovoltaic cell sheet (1230), a second light-transmitting adhesive layer (1240), and a glass back plate (1250) stacked in sequence.

3. A wide-angle energy collection photovoltaic device according to claim 2, characterized in that: The double-sided photovoltaic cell sheet (1230) includes a plurality of double-sided photovoltaic cell units (1231) connected in series or in parallel.

4. A wide-angle energy collection photovoltaic device according to claim 1, characterized in that: The energy collection assembly (2000) further comprises a reflection frame (2200), wherein a reflection curved surface matching the fitting curved surface is provided on a side of the reflection frame (2200) close to the double-sided photovoltaic cell assembly (1000), and all of the micro-concave mirror units (2100) are mounted on the reflection frame (2200).

5. A wide-angle energy collection photovoltaic device according to claim 4, characterized in that: The micro-concave mirror unit (2100) is a micro high-gloss aluminum concave mirror, and the reflection frame (2200) is a high-gloss aluminum frame.

6. A wide-angle energy collection photovoltaic device according to claim 1, characterized in that: The support (3000) comprises a support frame (3100), a battery frame (3200) and an energy collecting seat (3300); the battery frame (3200) is adjustably connected to the support frame (3100); the energy collecting seat (3300) is adjustably connected to the support frame (3100); the double-sided photovoltaic cell assembly (1000) is installed on the battery frame (3200); and the energy collecting assembly (2000) is installed on the energy collecting seat (3300).

7. A wide-angle energy collection photovoltaic device according to claim 6, characterized in that: The support frame (3100) is provided with a first screw hole (3110) and a second screw hole (3120), and the bracket (3000) further includes a first screw (3400) and a second screw (3500), the battery rack (3200) is provided with a first through hole (3210), and the energy collecting seat (3300) is provided with a second through hole (3310), the battery rack (3200) and the energy collecting seat (3300) are both rotatably connected to the support frame (3100), the first screw (3400) is passed through the first through hole (3210) and is threadedly connected to the first screw hole (3110) to fix the position of the battery rack (3200) relative to the support frame (3100), and the second screw (3500) is passed through the second through hole (3310) and is threadedly connected to the second screw hole (3120) to fix the position of the energy collecting seat (3300) relative to the support frame (3100).

8. A wide-angle energy collection photovoltaic device according to claim 1, characterized in that: The front side of the double-sided photovoltaic cell assembly (1000) is tilted upward, with α=90°.

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