Solar cell silicon wafer surface pickling device

Abstract

The utility model discloses a solar cell silicon wafer surface pickling device, which relates to the technical field of solar cell silicon wafer pickling, and comprises a pickling tank, a groove is arranged above the pickling tank, the output ends of two motors I penetrate through the groove and are fixedly connected with screw rods, the outer side walls of the two screw rods are sleeved with sliding seats, and the sliding seats are fixedly connected with the pickling tank. And an electric lifting rod is installed above the portal frame, the output end of the electric lifting rod is fixedly connected with a grabbing assembly, the output end of a second motor is fixedly connected with a rotating shaft, the outer side wall of the rotating shaft is fixedly connected with a scraping plate, and a circulating assembly is arranged below the pickling tank. By arranging the pickling tank, the portal frame and the grabbing assembly, the silicon wafer can be pickled, and uniform soaking of the silicon wafer in the pickling tank is achieved; and the scraping plate and the circulating assembly are arranged, so that a solution in the pickling tank can be cleaned and filtered, the solution is kept clean, recycling of the solution is achieved, and resource waste is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of acid pickling of silicon wafers for solar cells, and particularly relates to an acid pickling device for the surface of silicon wafers for solar cells. Background Art

[0002] The acid pickling of silicon wafers for solar cells is used to remove impurities and uneven areas on the surface of the wafers, so as to improve the efficiency and performance of solar cells.

[0003] When applying for a patent, it was found through retrieval that a Chinese patent with the patent number CN212461610U: an acid pickling device for the surface of silicon wafers used in the production of perovskite solar cells, which relates to the technical field of acid pickling of the surface of solar cells. To solve the problems that when the silicon wafer reacts statically with the pickling solution, the reaction rate is slow, and when a large amount of acid pickling processing is carried out, the time consumed is greatly increased, the acid pickling efficiency is poor, and it cannot meet the use requirements. Above the pickling table, there is a frame and a baffle. Between the frame and the baffle, there is a pickling pool, and the pickling pool is attached to the pickling table. Inside the pickling pool, there is a filter screen, and the filter screen is attached to the inner wall of the pickling pool. Inside the frame, there is a first motor. Below the frame, there is a sliding block. Inside the sliding block, there is a lifting cavity. Inside the lifting cavity, there is a lifting block. Below the lifting block, there is a fixed frame. Inside the fixed frame, there is a silicon wafer. Inside the lifting block, there is a second motor.

[0004] In the process of using the above solution, the impurities in the pickling pool are filtered through the filter screen. However, after filtering, the impurities still float on the surface of the filter screen, which will cause the impurities to reattach to the silicon wafer. Secondly, after the pickling pool is used for a long time, the cleanliness will decrease, and discharging through the drain pipe will cause waste of resources. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides an acid pickling device for the surface of silicon wafers for solar cells. By setting a pickling pool, a gantry and a grasping component, the silicon wafer can be pickled to achieve uniform immersion of the silicon wafer in the pickling pool; a scraper and a circulation component are set, which can clean and filter the solution in the pickling pool, keep the solution clean, realize the recycling of the solution, and reduce resource waste.

[0006] The present utility model also provides a surface pickling device for a solar cell silicon wafer having the above-described one, including: a pickling tank, a groove is provided above the pickling tank, two motors I are fixedly connected to one side of the pickling tank, the output ends of the two motors I penetrate through the groove and are fixedly connected with lead screws, sliding seats are sleeved on the outer side walls of the two lead screws, a gantry is fixedly connected to the upper ends of the two sliding seats, an electric lifting rod is installed above the gantry, a grasping assembly is fixedly connected to the output end of the electric lifting rod, a motor II is fixedly connected to the bottom wall of the pickling tank, a rotating shaft is fixedly connected to the output end of the motor II, a scraping plate is fixedly connected to the outer side wall of the rotating shaft, and a circulating assembly is provided below the pickling tank;

[0007] The grasping assembly includes a grasping plate fixedly connected below the electric lifting rod, adjusting bolts are threadedly connected to both sides of the grasping plate, a handle is fixedly connected to one end of the adjusting bolt, and a clamping block is fixedly connected to the end of the adjusting bolt away from the handle.

[0008] According to the surface pickling device for a solar cell silicon wafer described above, the circulating assembly includes a circulating tank fixedly connected below the pickling tank, a filter screen and an activated carbon plate are provided on the inner wall of the circulating tank, a pump body is fixedly connected to one side of the circulating tank, and a return pipe is fixedly connected to the output end of the pump body.

[0009] According to the surface pickling device for a solar cell silicon wafer described above, a fixing rod is fixedly connected to the outer side wall of the return pipe, and the side of the fixing rod away from the return pipe is fixedly connected to one side of the pickling tank. The stability of the return pipe is achieved through the fixing rod.

[0010] According to the surface pickling device for a solar cell silicon wafer described above, an electronic valve body is provided above the circulating tank, and the upper end of the electronic valve body is communicated with the inner bottom wall of the pickling tank. The solution in the pickling tank is discharged into the circulating tank through the electronic valve body.

[0011] According to the surface pickling device for a solar cell silicon wafer described above, the number of the scraping plates is two and the shape is L-shaped, and the scraping plates are adapted to the inner wall of the pickling tank. The inner wall of the pickling tank is cleaned by the scraping plates.

[0012] According to the surface pickling device for a solar cell silicon wafer described above, the shape of the clamping block is U-shaped, and a protective pad is provided on the inner wall of the clamping block. The stability of the silicon wafer during pickling is ensured by the clamping block.

[0013] According to the surface pickling device for a solar cell silicon wafer described above, a drying tank is provided above the pickling tank, and the drying tank is connected to the inner wall of the pickling tank through a pipeline.

[0014] The present utility model has the following beneficial effects:

[0015] 1. In the present utility model, by providing a pickling tank, a gantry and a grasping assembly, pickling of silicon wafers can be carried out, and uniform immersion of the silicon wafers in the pickling tank can be achieved.

[0016] 2. In the present utility model, by providing a scraper and a circulation assembly, the solution in the pickling tank can be cleaned and filtered, so that the solution remains clean, the circulation use of the solution is realized, and resource waste is reduced.

[0017] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0019] Figure 1 It is a perspective view of the front view of a surface pickling device for solar cell silicon wafers of the present utility model;

[0020] Figure 2 It is a perspective view of the top view of a surface pickling device for solar cell silicon wafers of the present utility model;

[0021] Figure 3 It is a front view structure diagram of a surface pickling device for solar cell silicon wafers of the present utility model;

[0022] Figure 4 It is a perspective view of the grasping assembly of a surface pickling device for solar cell silicon wafers of the present utility model.

[0023] LEGEND DESCRIPTION:

[0024] 1. Pickling tank; 2. Groove; 3. Motor 1; 4. Lead screw; 5. Sliding seat; 6. Gantry; 7. Electric lifting rod; 8. Grasping assembly; 9. Motor 2; 10. Rotating shaft; 11. Scraper; 12. Circulation assembly; 801. Grasping plate; 802. Adjusting bolt; 803. Handle; 804. Clamping block; 121. Circulation tank; 122. Filter screen; 123. Activated carbon plate; 124. Pump body; 125. Return pipe; 1251. Fixed rod; 1211. Electronic valve body; 101. Air drying tank. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be understood as a limitation on the protection scope of the present utility model.

[0026] Refer toFigures 1-4 , in an embodiment of the present utility model, a surface pickling device for a silicon wafer of a solar cell includes: a pickling tank 1, an air drying tank 101 is arranged above the pickling tank 1, the air drying tank 101 is connected to the inner wall of the pickling tank 1 through a pipeline, a groove 2 is arranged above the pickling tank 1, two motors 3 are fixedly connected to one side of the pickling tank 1, the output ends of the two motors 3 penetrate through the groove 2 and are fixedly connected with screw rods 4, sliding seats 5 are sleeved on the outer side walls of the two screw rods 4, a gantry 6 is fixedly connected to the upper ends of the two sliding seats 5, an electric lifting rod 7 is installed above the gantry 6, a grasping component 8 is fixedly connected to the output end of the electric lifting rod 7, a motor 9 is fixedly connected to the bottom wall of the pickling tank 1, a rotating shaft 10 is fixedly connected to the output end of the motor 9, a scraping plate 11 is fixedly connected to the outer side wall of the rotating shaft 10, the number of the scraping plates 11 is two and the shape is L-shaped, and the scraping plate 11 is adapted to the inner wall of the pickling tank 1, and a circulating component 12 is arranged below the pickling tank 1;

[0027] The grasping component 8 includes a grasping plate 801 fixedly connected below the electric lifting rod 7, adjusting bolts 802 are threadedly connected to both sides of the grasping plate 801, a handle 803 is fixedly connected to one end of the adjusting bolt 802, a clamping block 804 is fixedly connected to the end of the adjusting bolt 802 far away from the handle 803, the shape of the clamping block 804 is U-shaped, and a protective pad is arranged on the inner wall of the clamping block 804.

[0028] The circulating component 12 includes a circulating tank 121 fixedly connected below the pickling tank 1, an electronic valve body 1211 is arranged above the circulating tank 121, the upper end of the electronic valve body 1211 is communicated with the inner bottom wall of the pickling tank 1, a filter screen 122 and an activated carbon plate 123 are arranged on the inner wall of the circulating tank 121, a pump body 124 is fixedly connected to one side of the circulating tank 121, a return pipe 125 is fixedly connected to the output end of the pump body 124, a fixing rod 1251 is fixedly connected to the outer side wall of the return pipe 125, and the side of the fixing rod 1251 far away from the return pipe 125 is fixedly connected to one side of the pickling tank 1. By arranging the pickling tank 1, the gantry 6 and the grasping component 8, the silicon wafer can be pickled to realize uniform immersion of the silicon wafer in the pickling tank 1; by arranging the scraping plate 11 and the circulating component 12, the solution in the pickling tank 1 can be cleaned and filtered to keep the solution clean, realize the recycling of the solution, and reduce resource waste.

[0029] Working principle: When in use, place the silicon wafer under the grasping plate 801, and rotate the two handles 803 to drive the clamping block 804 at one end of the adjusting bolt 802 to clamp both sides of the silicon wafer. After clamping, start the first motor 3 to output the lead screw 4, so that the sliding seat 5 drives the gantry 6 to move, move the silicon wafer above the pickling tank 1, and start the electric lifting rod 7 to lower to immerse the silicon wafer in the pickling tank 1. After the immersion is completed, the silicon wafer is lifted by the electric lifting rod 7 and moved to the air drying tank 101 for drying treatment. The dripping solution flows back to the pickling tank 1 through the pipeline at the bottom of the air drying tank 101. When the solution in the pickling tank 1 becomes turbid, start the electronic valve body 1211 to make the solution in the pickling tank 1 flow into the circulation tank 121, and filter and purify it through the filter screen 122 and the activated carbon plate 123 in the circulation tank 121. Then start the pump body 124 to output the return pipe 125 to transport the filtered solution to the pickling tank 1, so as to realize the recycling of the solution and reduce resource waste. In addition, when the solution is discharged into the circulation tank 121, start the second motor 9 to output the rotating shaft 10 to drive the scraper 11 to scrape the sediment at the bottom of the pickling tank 1 to prevent impurities from reattaching to the silicon wafer.

[0030] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. A solar cell silicon wafer surface pickling device, comprising: A pickling tank (1), characterized in that a groove (2) is provided above the pickling tank (1), two motors (3) are fixedly connected to one side of the pickling tank (1), the output ends of the two motors (3) and passing through the groove (2) are fixedly connected to screw rods (4), the outer walls of the two screw rods (4) are sleeved with sliding seats (5), the upper ends of the two sliding seats (5) are fixedly connected to a gantry (6), an electric lifting rod (7) is installed above the gantry (6), the output end of the electric lifting rod (7) is fixedly connected to a grab assembly (8), the bottom wall of the pickling tank (1) is fixedly connected to a motor (9), the output end of the motor (9) is fixedly connected to a rotating shaft (10), the outer wall of the rotating shaft (10) is fixedly connected to a scraper (11), and a circulation assembly (12) is provided below the pickling tank (1); The grabbing assembly (8) comprises a grabbing plate (801) fixedly connected to the bottom of the electric lifting rod (7), and adjusting bolts (802) are threadedly connected to both sides of the grabbing plate (801), one end of the adjusting bolt (802) is fixedly connected to a handle (803), and the end of the adjusting bolt (802) away from the handle (803) is fixedly connected to a clamping block (804).

2. A solar cell silicon wafer surface pickling device according to claim 1, characterized in that: The circulation assembly (12) comprises a circulation box (121) fixedly connected to the bottom of the pickling tank (1); the inner wall of the circulation box (121) is provided with a filter screen (122) and an activated carbon plate (123); one side of the circulation box (121) is fixedly connected to a pump body (124); and the output end of the pump body (124) is fixedly connected to a return pipe (125).

3. A solar cell silicon wafer surface pickling device according to claim 2, characterized in that: A fixing rod (1251) is fixedly connected to the outer side wall of the return pipe (125), and a side of the fixing rod (1251) away from the return pipe (125) is fixedly connected to a side of the pickling tank (1).

4. A solar cell silicon wafer surface pickling device according to claim 2, characterized in that: An electronic valve body (1211) is arranged above the circulation box (121), and the upper end of the electronic valve body (1211) is connected to the inner bottom wall of the pickling tank (1).

5. A solar cell silicon wafer surface pickling device according to claim 1, characterized in that: There are two scrapers (11) in number and they are L-shaped. The scrapers (11) are adapted to fit the inner wall of the pickling tank (1).

6. A solar cell silicon wafer surface pickling device according to claim 1, characterized in that: The shape of the clamping block (804) is U-shaped, and a protective pad is provided on the inner wall of the clamping block (804).

7. A solar cell silicon wafer surface pickling device according to claim 1, characterized in that: An air drying tank (101) is provided above the pickling tank (1), and the air drying tank (101) is connected to the inner wall of the pickling tank (1) through a pipeline.

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