A thin film solar cell spraying device

Abstract

The utility model relates to the field of thin-film solar cell processing equipment, and provides a thin-film solar cell spraying device, comprising an input conveyor belt, a spraying conveyor belt, and an output conveyor belt arranged in sequence, wherein a spraying mechanism for spraying a solvent on the upper surface of the solar cell is provided directly above the spraying conveyor belt; the input conveyor belt and the output conveyor belt can both be raised and lowered, and when the spraying mechanism is working, the input conveyor belt and the output conveyor belt rise and move away from the spraying area. The conveying mechanism of the device is divided into three areas, which avoids the risk of cadmium chloride solution remaining on the conveyor belt, thereby preventing the positive surface of the cadmium telluride solar cell from being contaminated.

Description

Technical Field

[0001] The utility model relates to the field of thin-film solar cell processing equipment, in particular to a thin-film solar cell spraying device. Background Art

[0002] Solar cells are devices that convert sunlight into electrical energy, and their development history can be traced back to the 19th century. With the development of science and technology, solar cell technology has been continuously optimized, and many types of solar cells have emerged, such as silicon-based solar cells and cadmium selenium solar cells. As an emerging solar cell technology, cadmium telluride solar cell technology has great application potential in photovoltaic power generation systems due to its high efficiency and stability. Cadmium telluride solar cells can not only be widely used in household photovoltaic power generation systems and commercial photovoltaic projects, but also in aerospace, military and communications.

[0003] In the production process of cadmium telluride solar cells, a layer of cadmium chloride solution needs to be sprayed on the thin film layer on the upper surface to improve the efficiency of the cell. However, the cadmium chloride solution will affect the positive side of the lower surface of the cadmium telluride solar cell, resulting in a decrease in the photoelectric conversion efficiency. Therefore, it is important to prevent the cadmium chloride solution from being contaminated on the positive side of the cadmium telluride solar cell. The existing technology mainly uses a fan filter system to suck the atomized cadmium chloride solution, but this method cannot completely prevent the cadmium chloride solution from being contaminated on the positive side of the cadmium telluride solar cell. The main reason is that a large amount of cadmium chloride solution will remain on the conveyor belt during spraying, causing the positive side of the next workpiece to be contaminated.

[0004] CN111097637A discloses a multi-station glue spraying production line and a glue spraying cleaning system thereof, including a cleaning box, an output conveyor belt mechanism, an input conveyor belt mechanism, a glue spraying conveyor belt and a glue spraying machine, brackets are welded at both ends of the cleaning box, and the output conveyor belt mechanism and the input conveyor belt mechanism are respectively fixed on the brackets at both ends, four hydraulic cylinders are fixed to the top of the cleaning box by screws, and the hydraulic cylinders are fixed to the bottom of the glue spraying machine by screws, and the four hydraulic cylinders are connected to a synchronous hydraulic system; the four corners of the top of the cleaning box are welded with support seats. The system can mechanically lift the height of the glue spraying machine and adjust the glue spraying position by setting hydraulic cylinders, and install a cleaning mechanism, and adjust the spacing between the upper cleaning roller and the lower cleaning roller by connecting the No. 1 motor and the lead screw; and install the No. 2 motor, which can drive the lower cleaning roller to rotate through the No. 2 motor, mechanized cleaning, and improve the cleaning effect and cleaning efficiency. The above-mentioned glue spraying cleaning system blocks and cleans the glue spraying conveyor belt by the cleaning box, thereby avoiding affecting the lower surface of the workpiece. However, this cleaning principle still cannot ensure that there is no cadmium chloride solution residue on the glue spraying conveyor belt.

[0005] Based on this, the technical problem solved in this case is: how to solve the problem of cadmium chloride solution remaining on the conveyor belt and contaminating the positive side of the cadmium telluride solar cell. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a thin-film solar cell spraying device. The conveying mechanism of the device is divided into three areas, which avoids the risk of cadmium chloride solution remaining on the conveyor belt, thereby preventing the positive side of the cadmium telluride solar cell from being contaminated.

[0007] The technical solution of the utility model is:

[0008] A thin-film solar cell spraying device comprises an input conveyor belt, a spraying conveyor belt and an output conveyor belt arranged in sequence, wherein a spraying mechanism for spraying a solvent on the upper surface of the solar cell is provided directly above the spraying conveyor belt; the input conveyor belt and the output conveyor belt can both be raised and lowered, and when the spraying mechanism is working, the input conveyor belt and the output conveyor belt rise and move away from the spraying area.

[0009] In the above-mentioned thin-film solar cell spraying device, the conveying surface of the spraying conveyor belt can be completely covered by the solar cells.

[0010] In the above-mentioned thin-film solar cell spraying device, the input conveyor belt and the output conveyor belt have the same structure.

[0011] In the above-mentioned thin-film solar cell spraying device, the input conveyor belt includes a base, a conveying unit, and a driving unit; the driving unit is arranged on the base, and the power output end of the driving unit is connected to the conveying unit and is used to drive the conveying unit to move up and down.

[0012] In the above-mentioned thin-film solar cell spraying device, the conveying unit includes a pair of symmetrically arranged support beams and a plurality of rollers disposed on the pair of support beams.

[0013] In the above-mentioned thin-film solar cell spraying device, at least two guide rods are provided on the support beam; and the transmission unit is slidably connected to the base via the guide rods.

[0014] In the above-mentioned thin-film solar cell spraying device, the driving unit includes a pair of hydraulic cylinders and their oil tanks symmetrically arranged on both sides of the base; the cylinder body of the hydraulic cylinder is set on the base, and the power output end of the hydraulic cylinder is connected to the support beam and is used to drive the transmission unit up and down.

[0015] In the above-mentioned thin-film solar cell spraying device, the input conveyor belt, the spraying conveyor belt, and the output conveyor belt can all operate independently.

[0016] In the above-mentioned thin-film solar cell spraying device, the input conveyor belt and the output conveyor belt rise and fall synchronously.

[0017] In the above-mentioned thin-film solar cell spraying device, the final rising heights of the input conveyor belt and the output conveyor belt exceed the output end of the spraying mechanism.

[0018] One of the above technical solutions of the utility model has at least one of the following advantages or beneficial effects:

[0019] The input conveyor belt, spraying conveyor belt and output conveyor belt of the utility model are arranged in sequence, and the spraying mechanism can only work in the area of ​​the spraying conveyor belt, thereby preventing the atomized cadmium chloride solution from splashing onto the input conveyor belt and the output conveyor belt. At the same time, during the spraying process, the input conveyor belt and the output conveyor belt rise and move away from the spraying area, thereby preventing the atomized cadmium chloride solution from being affected by wind and drifting onto the input conveyor belt and the output conveyor belt. The situation where the positive side of the cadmium telluride solar cell is contaminated is avoided to a great extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a working schematic diagram of Embodiment 1 of the present utility model;

[0021] Figure 2 It is a side structural schematic diagram of the input conveyor belt and the output conveyor belt of Example 1 of the utility model;

[0022] Figure 3 It is a front structural schematic diagram of the input conveyor belt and the output conveyor belt of Example 1 of the utility model.

[0023] The corresponding relationship among the figures is as follows:

[0024] 1. Input conveyor belt; 2. Spraying conveyor belt; 3. Output conveyor belt; 4. Spraying mechanism; 5. Base; 6. Conveying unit; 61. Support beam; 62. Roller; 63. Guide rod; 7. Driving unit. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example 1

[0027] See also Figures 1 to 3A thin-film solar cell spraying device comprises an input conveyor belt 1, a spraying conveyor belt 2, and an output conveyor belt 3 which are arranged in sequence. A spraying mechanism 4 for spraying a solvent on the upper surface of the solar cell is provided directly above the spraying conveyor belt 2; the input conveyor belt 1 and the output conveyor belt 3 can both be raised and lowered. When the spraying mechanism 4 is working, the input conveyor belt 1 and the output conveyor belt 3 rise and move away from the spraying area.

[0028] In this embodiment, the input conveyor belt 1, the spraying conveyor belt 2, and the output conveyor belt 3 are arranged in sequence, and the spraying mechanism 4 can only work in the area of ​​the spraying conveyor belt 2, so as to prevent the atomized cadmium chloride solution from splashing onto the input conveyor belt 1 and the output conveyor belt 3. At the same time, during the spraying process, the input conveyor belt 1 and the output conveyor belt 3 rise and move away from the spraying area, so as to prevent the atomized cadmium chloride solution from being affected by wind and drifting onto the input conveyor belt 1 and the output conveyor belt 3.

[0029] It should be noted that, in this embodiment, the input conveyor belt 1, the spraying conveyor belt 2, and the output conveyor belt 3 are all roller conveyor belts.

[0030] In practical applications, the conveying surface of the spray conveyor belt 2 can be completely covered by the solar cell, in order to prevent the atomized spray solution from being contaminated on the spray conveyor belt 2 and thus contaminating the positive side of the cadmium telluride solar cell.

[0031] In order to briefly illustrate the solution in this embodiment, the structures of the input conveyor belt 1 and the output conveyor belt 3 are the same, and this embodiment also only further describes the structure of the input conveyor belt 1.

[0032] Specifically, the input conveyor belt 1 includes a base 5, a transmission unit 6, and a driving unit 7; the driving unit 7 is disposed on the base 5, and a power output end of the driving unit 7 is connected to the transmission unit 6 and is used to drive the transmission unit 6 to move up and down.

[0033] More specifically, the conveying unit 6 includes a pair of symmetrically arranged support beams 61 and a plurality of rollers 62 disposed on the pair of support beams 61 .

[0034] More specifically, two guide rods 63 are disposed on the support beam 61 ; the transmission unit 6 and the base 5 are slidably connected via the guide rods 63 .

[0035] Under the above design, the input conveyor belt 1 and the output conveyor belt 3 have simple structures and can easily realize the lifting function. Of course, this embodiment only provides a relatively simple way. There are many ways to realize the lifting of the conveyor belt in the technical field, such as publication number: CN203845335U, which uses a scissor structure to realize lifting.

[0036] In order to ensure the smoothness of lifting and lowering and improve the load capacity, the driving unit 7 includes a pair of hydraulic cylinders 71 and their oil tanks 72 symmetrically arranged on both sides of the base 5; the cylinder body of the hydraulic cylinder 71 is set on the base 5, and the power output end of the hydraulic cylinder 71 is connected to the support beam 61 and is used to drive the transmission unit 6 to lift up and down.

[0037] As a preferred embodiment of this embodiment, the input conveyor belt 1, the spraying conveyor belt 2, and the output conveyor belt 3 can all operate independently.

[0038] As a further preference of this embodiment, the input conveyor belt 1 and the output conveyor belt 3 are raised and lowered synchronously.

[0039] Under the above-mentioned preference, the specific working process of this embodiment is as follows: the cadmium telluride solar cell completely enters the spraying conveyor belt 2 from the input conveyor belt 1, then the input conveyor belt 1 and the spraying conveyor belt 2 stop conveying, and the spraying mechanism 4 starts working. At this time, the input conveyor belt 1 and the output conveyor belt 3 rise away from the spraying area. When the spraying mechanism 4 completes the work, the input conveyor belt 1 and the output conveyor belt 3 drop back to the same height as the spraying conveyor belt 2, and then the spraying conveyor belt 2 and the output conveyor belt 3 start to convey the workpiece to the outside. Wait for the next workpiece and repeat the above process for batch processing. Of course, in order to speed up the processing rate, the workpiece can also be input while outputting the workpiece.

[0040] In practical applications, in order to ensure that the atomized cadmium chloride solution does not splash onto the input conveyor belt 1 and the output conveyor belt 3 , the final rising heights of the input conveyor belt 1 and the output conveyor belt 3 exceed the output end of the spraying mechanism 4 .

[0041] 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 thin-film solar cell spraying device, comprising an input conveyor belt, a spraying conveyor belt, and an output conveyor belt arranged in sequence, characterized in that: A spraying mechanism for spraying solvent on the upper surface of the solar cell is provided directly above the spraying conveyor belt; the input conveyor belt and the output conveyor belt can both be raised and lowered, and when the spraying mechanism is working, the input conveyor belt and the output conveyor belt rise and move away from the spraying area.

2. A thin-film solar cell spraying device according to claim 1, characterized in that: The conveying surface of the spraying conveyor belt can be completely covered by the solar cells.

3. A thin-film solar cell spraying device according to claim 1, characterized in that: The input conveyor belt and the output conveyor belt have the same structure.

4. A thin-film solar cell spraying device according to claim 1 or 3, characterized in that: The input conveyor belt comprises a base, a conveying unit and a driving unit; the driving unit is arranged on the base, and a power output end of the driving unit is connected to the conveying unit and is used to drive the conveying unit to move up and down.

5. A thin-film solar cell spraying device according to claim 4, characterized in that: The conveying unit includes a pair of symmetrically arranged supporting beams and a plurality of rollers arranged on the pair of supporting beams.

6. A thin-film solar cell spraying device according to claim 5, characterized in that: At least two guide rods are arranged on the support beam; the transmission unit is slidably connected with the base through the guide rods.

7. A thin-film solar cell spraying device according to claim 6, characterized in that: The driving unit comprises a pair of hydraulic cylinders and oil tanks symmetrically arranged on both sides of the base; the cylinder bodies of the hydraulic cylinders are arranged on the base, and the power output ends of the hydraulic cylinders are connected to the support beams and are used to drive the transmission unit to move up and down.

8. A thin-film solar cell spraying device according to any one of claims 1 to 7, characterized in that: The input conveyor belt, the spraying conveyor belt and the output conveyor belt can all operate independently.

9. A thin-film solar cell spraying device according to claim 8, characterized in that: The input conveyor belt and the output conveyor belt are raised and lowered synchronously.

10. The thin-film solar cell spraying device according to claim 1, characterized in that: The final heights of the rise of the input conveyor belt and the output conveyor belt exceed the output end of the spraying mechanism.

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