Thin-film gas column concentrating photovoltaic cell components and component arrays

Abstract

The present invention discloses a thin film gas column concentrating photovoltaic cell assembly and assembly array, wherein the cell assembly comprises: a thin film gas column, wherein the thin film gas column is a hollow cylinder with closed ends and end caps at both ends, wherein the side wall of the cylinder is a thin film, and an end cap is provided with a gas nozzle and an electrode lead-out device; the column of the thin film gas column is filled with an inert gas; a concave track is provided on the inner wall of the thin film gas column, and a sun tracking platform base is movably installed on the concave track; a reflective concentrating device and a solar cell array are installed on the sun tracking platform base, which are used to rotate around the central axis of the thin film gas column in the thin film gas column. The technical solution of the present invention has low cost, stable structure and high photoelectric conversion efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic cells, and in particular to a thin-film air column concentrating photovoltaic cell component and a component array. Background Art

[0002] Solar photovoltaic power generation is a new energy technology with high technical content and development prospects. The existing flat-plate solar photovoltaic assembly forms an integral structure by combining glass, photovoltaic cells, wires, wiring devices, adhesive materials, etc. to realize the conversion of light energy into electrical energy under the irradiation of sunlight. On this basis, in order to achieve more electrical energy with fewer batteries, a solar concentrating photovoltaic power generation system has been further developed. The patent with announcement number CN103456823B discloses a tubular concentrating photovoltaic cell assembly, which includes a glass tube, a photovoltaic cell array installed in the glass tube, and a group of concentrating optical systems. Its concentrating optical system is a group of parabolic reflection systems, and its photovoltaic cell array is arranged close to the inner wall of the glass tube, and heat is transferred to the environment outside the glass tube through the glass tube wall. The problem with this technical solution is that the parabolic trough optical system of the concentrating photovoltaic cell assembly has the problem of high installation accuracy requirements, and the glass tube is easy to break and dust is easy to fall, resulting in excessive cost during transportation, installation and use, which increases the cost of power generation. Therefore, how to develop a new type of concentrating photovoltaic cell assembly to overcome the above-mentioned problems of the prior art is a direction that technicians in this field need to study. Summary of the invention

[0003] The object of the present invention is to provide a thin-film gas column concentrating photovoltaic cell assembly, which has the technical advantages of low cost, stable structure and high photoelectric conversion efficiency.

[0004] The technical solutions adopted are as follows:

[0005] A thin film air column concentrating photovoltaic cell assembly comprises: a thin film air column, which is a hollow cylinder with closed ends and end caps at both ends, and a thin film on the side wall of the column, and an air nozzle and an electrode lead-out device on one end cap; the column body of the thin film air column is filled with an inert gas; a concave track is provided on the inner wall of the thin film air column, and a solar tracking platform base is movably installed on the concave track; a reflective concentrating device and a solar cell array are installed on the solar tracking platform base, which rotate around the central axis of the thin film air column in the thin film air column.

[0006] By adopting this technical solution: the process of focusing, receiving and tracking the sun is all realized in the confined space of the thin film air column. At the same time, by filling the column with inert gas, a structure with a certain supporting force is formed, which overcomes the problem of the fragility of the tube body in the prior art, prolongs the service life of the battery cell, and reduces the cost. By setting up a solar tracking platform base, the reflective focusing device and the solar cell array track the sunlight, ensuring a high photoelectric conversion efficiency. By adopting a columnar structure, there is less wind impact and mutual shadow shading, and a higher energy density layout is achieved under the same area.

[0007] Preferably, in the above-mentioned thin-film air column concentrating photovoltaic cell assembly: the reflective concentrating device includes a segmented plane combined reflective surface.

[0008] By adopting this technical solution: using fewer solar cells, reducing component weight and installation complexity, and improving photoelectric conversion efficiency.

[0009] More preferably, in the above-mentioned thin-film air column concentrating photovoltaic cell assembly: the segmented plane combined reflecting surface is composed of a plurality of plane reflecting mirror surfaces or is formed by splicing a plurality of thin-film lenses.

[0010] By adopting this technical solution: the segmented plane combined reflective surface composed of multiple plane reflective mirrors can obtain a uniformly distributed energy flux density at the focal plane position, thereby improving the photoelectric conversion rate and service life of the solar cell. The segmented plane combined reflective surface spliced ​​by thin film lenses has a simple structure, high strength, low manufacturing cost and good reflectivity.

[0011] It is further preferred that, in the above-mentioned thin-film air column concentrating photovoltaic cell assembly: the focusing ratio of the reflective concentrating device is designed to be 2.5 to 5 times.

[0012] By adopting this technical solution, it has the advantages of reducing the number of solar cells used, lowering the system's requirements for solar tracking accuracy, reducing the difficulty of radiator design, and implementing efficient reception of sunlight.

[0013] It is further preferred that in the above-mentioned thin-film air column concentrating photovoltaic cell assembly: the solar cell array includes a radiator and solar cells, the radiator is a triangular tube structure, and one side wall of the radiator is facing the reflective concentrating device; the solar cell array is evenly distributed on the outer wall of the tube body of the radiator.

[0014] By adopting this technical solution: the side wall surface of the radiator facing the reflective concentrator is used as the main receiving surface, and the other two surfaces are used as auxiliary receiving surfaces. The main receiving surface directly receives the light from the reflective concentrator, and the two auxiliary receiving surfaces receive direct sunlight and scattered light, which serve as the induction signal source of the base of the solar tracking platform. At the same time, the light utilization rate of the concentrating photovoltaic cell assembly is improved, and the power generation is increased.

[0015] It is further preferred that, in the above-mentioned thin-film air column concentrating photovoltaic cell assembly: the solar cell is a single crystal silicon cell.

[0016] By adopting this technical solution: monocrystalline silicon cells have low cost and high photoelectric conversion efficiency compared to other cells.

[0017] It is further preferred that in the above-mentioned thin film air column concentrating photovoltaic cell assembly: the thin film is an ethylene-tetrafluoroethylene film.

[0018] By adopting this technical solution: Ethylene tetrafluoroethylene film, also known as ETFE film, has 97% light transmittance, an operating temperature of -80 to 220°C and excellent corrosion resistance.

[0019] It is further preferred that in the above-mentioned thin film air column concentrating photovoltaic cell assembly: the rotation axis of the thin film air column concentrating photovoltaic cell assembly (i.e. the central axis of the thin film air column) is fixed in the north-south axis direction, placed horizontally or vertically, or arranged at an angle to the horizontal plane.

[0020] It is further preferred that, in the above-mentioned thin-film air column concentrating photovoltaic cell assembly: the heat sink is made of aluminum or copper.

[0021] The present invention also discloses a thin film air column type concentrating photovoltaic cell assembly array, which includes a plurality of thin film air column type concentrating photovoltaic cell assemblies as described above, each of the thin film air column type concentrating photovoltaic cell assemblies is arranged in parallel, and adjacent electrode lead-out devices are connected in series or in parallel or in series and parallel.

[0022] Compared with the prior art, the present invention has a simple structure and is easy to implement, and has the technical advantages of low cost, stable structure and high photoelectric conversion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the structure of Example 1, in which the film is omitted;

[0024] Figure 2 for Figure 1 A schematic diagram of the structure of an end cap of a middle film air column;

[0025] Figure 3 for Figure 1 Schematic diagram of the working process of the medium film air column;

[0026] Figure 4 This is a schematic diagram of the structure of Example 2.

[0027] The corresponding component names of the reference numerals are as follows:

[0028] 1. Thin film air column; 2. Air nozzle; 3. Electrode lead-out device; 4. Concave track; 5. Solar tracking platform base; 6. Reflection focusing device; 7. Radiator; 8. Solar cell; 9. Support bearing; 10. Friction wheel; 11. End cover. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figure 1-3 Example 1 is shown:

[0031] A thin film gas column 1 concentrating photovoltaic cell assembly, comprising:

[0032] The thin film gas column 1 is a hollow cylinder with closed ends, and end caps 11 are provided at both ends. A gas nozzle 2 and an electrode lead-out device 3 are provided on one end cap 11. The side wall of the column is a thin film, and the thin film is an ethylene-tetrafluoroethylene film. The column of the thin film gas column 1 is filled with an inert gas through the gas nozzle 2.

[0033] A concave track 4 is provided on the inner wall of the film air column 1, and a supporting bearing 9 is movably installed in the concave track 4. The solar tracking platform base 5 is movably connected to the concave track 4 through the supporting bearing 9. The solar tracking platform base 5 is connected to the friction wheel 10, and rotates along the concave track 4 under the action of the friction wheel 10. A reflective focusing device and an array of solar cell panels 8 are installed on the solar tracking platform base 5, and both rotate around the central axis of the film air column 1 when the solar tracking platform rotates along the concave track 4. Among them, the reflective focusing device includes a segmented plane combined reflective surface. Specifically: the reflective focusing device includes a segmented plane combined reflective surface, and the segmented plane combined reflective surface is composed of multiple plane reflective mirrors or is spliced ​​by multiple film lenses. The focusing magnification of the reflective focusing device is designed to be 2.5 to 5 times. Preferably, the focusing magnification is designed to be 4 times.

[0034] The solar cell array includes a heat sink 7 and solar cells 8. The heat sink 7 is a triangular copper tube, and one side wall of the heat sink 7 is used as a main receiving surface facing the reflective focusing device 6, and the other two side walls are auxiliary receiving surfaces. The main receiving surface directly receives the light from the reflective focusing device, and the two auxiliary receiving surfaces receive direct sunlight and scattered light. The solar cells 8 are evenly distributed on the three outer wall surfaces of the tube body of the heat sink 7. The solar cells 8 use single crystal silicon cells.

[0035] In this example:

[0036] The rotation axis of the thin film air column 1 concentrating photovoltaic cell assembly is fixed in the north-south axis direction, and is placed horizontally or vertically or arranged at an angle to the horizontal plane.

[0037] like Figure 4 Shown is embodiment 2 of the present invention:

[0038] A thin film air column 1 type concentrating photovoltaic cell assembly array comprises five parallel arranged thin film air column 1 type concentrating photovoltaic cell assemblies as described in Example 1. In the array: adjacent electrode lead-out devices 3 are connected in parallel.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art 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 thin-film air column concentrating photovoltaic cell assembly, characterized in that: include: The thin film gas column is a hollow cylinder with closed ends and end caps at both ends. The side wall of the cylinder is a thin film, and one of the end caps is provided with a gas nozzle and an electrode lead-out device; the column of the thin film gas column is filled with an inert gas; a concave track is provided on the inner wall of the thin film gas column, and a solar tracking platform base is movably installed on the concave track; a reflective focusing device and a solar cell array are installed on the solar tracking platform base, which rotate around the central axis of the thin film gas column in the thin film gas column; The reflective focusing device comprises a segmented plane combined reflective surface; The solar cell array comprises a radiator and solar cells, one side wall of the radiator faces the reflective focusing device; the solar cell array is evenly distributed on the outer wall of the radiator tube; The rotation axis of the thin-film air column concentrating photovoltaic cell assembly is fixed in the north-south axis direction and is placed horizontally or vertically or arranged at an angle to the horizontal plane.

2. The thin-film gas column concentrating photovoltaic cell assembly according to claim 1, characterized in that: The segmented plane combined reflection surface is composed of a plurality of plane reflection mirror surfaces or is formed by splicing a plurality of film lenses.

3. The thin film air column concentrating photovoltaic cell assembly according to claim 1, characterized in that: The focusing ratio of the reflective focusing device is designed to be 2.5 to 5 times.

4. The thin film air column concentrating photovoltaic cell assembly according to claim 1, characterized in that: The radiator is in a triangular tube structure.

5. The thin film air column concentrating photovoltaic cell assembly according to claim 1, characterized in that: The solar cell is a single crystal silicon cell.

6. The thin-film air column concentrating photovoltaic cell assembly according to claim 1, characterized in that: The film is an ethylene-tetrafluoroethylene film.

7. The thin film air column concentrating photovoltaic cell assembly according to claim 1, characterized in that: The radiator is made of aluminum or copper.

8. A thin-film air column concentrating photovoltaic cell assembly array, characterized in that: It comprises a plurality of thin film air column concentrating photovoltaic cell assemblies as described in any one of claims 1 to 7, wherein each of the thin film air column concentrating photovoltaic cell assemblies is arranged in parallel, and adjacent electrode lead-out devices are connected in series, in parallel, or in series and in parallel.

Images