Solar cell etching liquid adding device

Abstract

The utility model discloses a solar cell etching liquid adding device, which comprises a movable frame, a plurality of material storage tanks are fixedly arranged at the bottom end of the movable frame, the top ends of the plurality of material storage tanks are communicated with a liquid pumping pipe, and a vacuum pump body is fixedly arranged at the top end of the movable frame. According to the utility model, after the vacuum pump body is opened and air in the buffer tanks is pumped out, negative pressure is generated in the buffer tanks, at the moment, the electromagnetic valves above the corresponding storage tanks can be opened when etching liquid in the storage tanks is needed, and the etching liquid in the storage tanks is separated from the storage tanks under the action of atmospheric pressure. The etching liquid enters the corresponding buffer tank through the liquid pumping pipe, then enters the discharging hopper through the liquid conveying hose and enters the etching device from the discharging hopper, so that adding of the etching liquid is achieved, adding of the etching liquid is achieved according to the negative pressure principle, devices such as a liquid pumping pump do not need to be used, and liquid injection can be smoothly conducted on a liquid injection position at a high position.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell sheets, in particular to a device for adding etching liquid to a solar cell sheet. Background Art

[0002] Solar cells are semiconductor devices that use the photovoltaic effect to convert solar energy into electrical energy. They are mainly made of semiconductor materials such as silicon. When sunlight shines on the cell, photons pass through the pn junction of the silicon material, are absorbed and stimulate mobile charges, thereby generating current. It is the basic unit of solar panels and is widely used in solar power generation systems, aerospace, satellite communications, and civil lighting. It has made important contributions to sustainable development and green energy utilization. Solar cells have the advantages of high conversion efficiency, long life, and low maintenance costs, and have become one of the indispensable renewable energy technologies in modern society.

[0003] Solar cells need to be etched, which is a key process step. Etching is the process of precisely removing a portion of the silicon wafer surface through chemical or physical methods to form a specific circuit pattern. This process is crucial to improving the efficiency of solar cells because it can accurately define the electrode structure and current path of the cell. Through etching, the light absorption and current collection capabilities of the cell can be optimized, thereby improving the photoelectric conversion efficiency. At the same time, etching technology can also help reduce the series resistance of the cell and further enhance the performance of the cell. Therefore, in the production process of solar cells, etching is an indispensable step, which ensures that each cell can achieve the best working state and provides technical support for the efficient use of solar energy.

[0004] Solar cells generally need to be etched from above using an etching device. This step is an important part of the cell production process. It forms a circuit pattern by accurately removing specific parts on the surface of the cell, thereby optimizing the photoelectric conversion efficiency of the cell. Etching from above can ensure that the etching liquid or etching gas acts evenly on the surface of the cell to avoid uneven etching or over-etching. This etching method can also effectively control the etching depth to ensure the structural integrity and performance stability of the cell. Therefore, using a professional etching device to etch solar cells from above is one of the key steps to improve the quality and efficiency of cells.

[0005] In actual operation, when the etching liquid inside the etching device is insufficient, it involves adding etching liquid to the device. Since the etching device is generally located at a higher position and the injection operation needs to be performed from above, this increases the difficulty of the operation. In particular, the etching liquid is mainly composed of strong acid, which is not only harmful to the human body, but also has safety hazards in manual addition. Although the use of equipment such as a liquid extraction pump to extract and transport the etching liquid is considered, long-term extraction and transportation of strong acid will cause serious corrosion to the liquid extraction pump, which not only shortens the service life of the equipment, but also may lead to safety risks such as leakage of the etching liquid. Therefore, how to effectively solve the problems of etching liquid addition and equipment corrosion while ensuring operational safety is a technical problem that needs to be urgently solved in the current production of solar cells. Utility Model Content

[0006] The utility model aims to provide a solar cell etching solution adding device to solve the above-mentioned shortcomings in the prior art.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a solar cell etching liquid adding device, comprising a movable frame, a plurality of storage tanks are fixedly installed on the bottom end of the movable frame, the top ends of the plurality of storage tanks are connected and installed with liquid extraction pipes, a vacuum pump body is fixedly installed on the top end of the movable frame, the input end of the vacuum pump body is connected and installed with a plurality of connecting pipes, the output end of the vacuum pump body is connected and installed with an exhaust pipe, one end of the plurality of connecting pipes is connected and installed with a buffer tank, the bottom ends of the plurality of buffer tanks are connected and installed with a liquid infusion hose, a lifting mechanism is arranged on the top end of the movable frame, the lifting mechanism comprises a lifting block, a lower hopper is fixedly installed on the side wall of the lifting block, the top end of the lower hopper is connected with a plurality of liquid infusion hoses, and solenoid valves are arranged on the plurality of liquid extraction pipes.

[0008] As a further description of the above technical solution: the lifting mechanism also includes a slide rail, which is fixedly installed on the top of the mobile frame. The internal rotation of the slide rail is connected to a screw rod, the lifting block is threadedly connected to the screw rod, and a motor is fixedly installed on the top of the mobile frame, and the output end of the motor is transmission-connected to the screw rod.

[0009] As a further description of the above technical solution: a one-way valve is arranged inside the infusion hose.

[0010] As a further description of the above technical solution: the interior of the buffer tank is provided with an inclined surface, the bottom end of the buffer tank is provided with a liquid outlet, and the liquid outlet is connected to the infusion hose.

[0011] As a further description of the above technical solution: a counterweight is fixedly mounted on the bottom end of the mobile frame, wheels are rotatably mounted on the bottom end of the mobile frame, and a limiting assembly is arranged on one side of the mobile frame.

[0012] As a further description of the above technical solution: the limiting assembly includes a fixing plate, which is fixedly mounted on the side wall of the movable frame, and a bolt is threadedly mounted on the fixing plate, and the bottom end of the bolt is fixedly connected to an anti-skid plate, and the bottom end of the anti-skid plate is provided with an anti-skid protrusion.

[0013] The utility model provides a solar cell etching liquid adding device. It has the following beneficial effects: when the etching device needs to be etched, the utility model first moves the mobile frame to a suitable position, then lifts the lifting block through the lifting mechanism, and further lifts the lower hopper. After the lower hopper is moved to a suitable position, considering that the cells of different processes use different types or concentrations of etching liquid, different etching liquids are placed inside multiple storage tanks, and the vacuum pump body is opened. After the air inside the buffer tank is extracted, negative pressure is generated inside the multiple buffer tanks. At this time, the etching liquid inside the storage tank is needed, and the electromagnetic valve above the corresponding storage tank can be opened. Under the action of atmospheric pressure, the etching liquid inside the storage tank enters the inside of the corresponding buffer tank through the liquid extraction pipe, and then enters the lower hopper through the infusion hose, and enters the inside of the etching device from the lower hopper, so that the addition of etching liquid is realized. The addition of etching liquid is realized by using the negative pressure principle, and there is no need to use devices such as liquid extraction pumps, and liquid injection at high injection points can be smoothly injected.

[0014] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0015] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a solar cell etching liquid adding device proposed by the utility model;

[0017] Figure 2 A schematic diagram of a three-dimensional structure from another viewing angle of the present invention;

[0018] Figure 3 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the material storage tank, liquid extraction pipe, solenoid valve and buffer tank of the utility model;

[0020] Figure 5 It is a schematic diagram of the cross-sectional structure of the inner wall of the buffer tank of the utility model;

[0021] Figure 6The utility model is a cross-sectional structural diagram of an infusion hose provided with a one-way valve inside.

[0022] Legend:

[0023] 1. Mobile frame; 2. Wheels; 3. Storage tank; 4. Liquid extraction pipe; 5. Solenoid valve; 6. Fixed plate; 7. Bolts; 8. Anti-skid plate; 9. Anti-skid protrusions; 10. Buffer tank; 11. Infusion hose; 12. Lower hopper; 13. Motor; 14. Slide rail; 15. Screw; 16. Lifting block; 17. Connecting pipe; 18. Vacuum pump body; 19. Exhaust pipe; 20. Inclined surface; 21. Liquid outlet; 22. Counterweight; 23. One-way valve. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Reference Figure 1-6, a solar cell etching liquid adding device comprises a mobile frame 1, a plurality of storage tanks 3 are fixedly installed at the bottom end of the mobile frame 1, and a plurality of liquid extraction pipes 4 are connected and installed at the top ends of the plurality of storage tanks 3, a vacuum pump body 18 is fixedly installed at the top end of the mobile frame 1, a plurality of connecting pipes 17 are connected and installed at the input end of the vacuum pump body 18, an exhaust pipe 19 is connected and installed at the output end of the vacuum pump body 18, a buffer tank 10 is connected and installed at one end of the plurality of connecting pipes 17, and a liquid infusion hose 11 is connected and installed at the bottom ends of the plurality of buffer tanks 10, a lifting mechanism is arranged at the top end of the mobile frame 1, and the lifting mechanism comprises a lifting block 16, a lower hopper 12 is fixedly installed on the side wall of the lifting block 16, and the top end of the lower hopper 12 is connected to the plurality of liquid infusion hoses 11, and a plurality of liquid extraction pipes 4 are provided with electromagnetic valves 5; when it is necessary to etch the etching device, first move the mobile frame 1 to a suitable position The lifting block 16 is then lifted and lowered by the lifting mechanism to further lift the lower hopper 12. After the lower hopper 12 is moved to a suitable position, considering that different types or concentrations of etching solutions are used for battery cells in different processes, different etching solutions are placed in multiple storage tanks 3. The vacuum pump body 18 is opened. After the air in the buffer tank 10 is extracted, negative pressure is generated inside the multiple buffer tanks 10. At this time, if the etching solution in the storage tank 3 is needed, the solenoid valve 5 above the corresponding storage tank 3 can be opened. Under the action of atmospheric pressure, the etching solution in the storage tank 3 enters the corresponding buffer tank 10 through the liquid extraction tube 4, and then enters the lower hopper 12 through the infusion hose 11, and enters the etching device from the lower hopper 12, thereby realizing the addition of etching solution. The addition of etching solution is realized by using the negative pressure principle, without the use of devices such as liquid extraction pumps, and the liquid injection point at a high place can be smoothly injected.

[0026] As the preferred technical solution of this embodiment, the lifting mechanism also includes a slide rail 14, which is fixedly installed on the top of the mobile frame 1. The internal rotation of the slide rail 14 is connected to a screw 15, and the lifting block 16 is threadedly connected to the screw 15. A motor 13 is fixedly installed on the top of the mobile frame 1, and the output end of the motor 13 is transmission-connected to the screw 15; the motor 13 drives the screw 15 to rotate, and under the limiting and guiding action of the slide rail 14 and the lifting block 16, the lifting block 16 can drive the lower hopper 12 to rise and fall, and the corresponding injection points at different heights can be adjusted and injected.

[0027] As a preferred technical solution of this embodiment, a one-way valve 23 is provided inside the infusion hose 11; the one-way valve 23 is provided on the one hand to prevent the etching liquid from flowing back inside the infusion hose 11, and on the other hand, when the vacuum pump body 18 evacuates the buffer tank 10, the outside air will not enter the buffer tank 10 through the infusion hose 11, thereby avoiding the destruction of the negative pressure environment and allowing the adding process to proceed smoothly.

[0028] As a preferred technical solution of this embodiment, a slope 20 is provided inside the buffer tank 10, and a liquid outlet 21 is opened at the bottom end of the buffer tank 10, and the liquid outlet 21 is connected to the infusion hose 11; to prevent cross-flow between multiple buffer tanks 10 due to the connecting pipe 17, the setting of the slope 20 can make the etching liquid flowing into the buffer tank 10 flow out directly from the slope 20 through the liquid outlet 21 below the slope 20, and will not flow out from the connecting pipe 17 on one side of the buffer tank 10.

[0029] As a preferred technical solution of this embodiment, a counterweight block 22 is fixedly installed at the bottom end of the mobile frame 1, a wheel 2 is rollingly installed at the bottom end of the mobile frame 1, and a limiting assembly is arranged on one side of the mobile frame 1; the arrangement of the wheel 2 is to ensure the overall movement of the device, and the arrangement of the counterweight block 22 ensures the stability of the mobile frame 1.

[0030] As the preferred technical solution of this embodiment, the limiting assembly includes a fixing plate 6, which is fixedly mounted on the side wall of the mobile frame 1, and a bolt 7 is threadedly mounted on the fixing plate 6. The bottom end of the bolt 7 is fixedly connected to an anti-skid plate 8, and the bottom end of the anti-skid plate 8 is provided with an anti-skid protrusion 9; when the device needs to be fixed, the anti-skid plate 8 below is contacted with the ground by rotating the bolt 7, which plays an anti-skid and limiting role, thereby increasing the stability of the device.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A solar cell etching solution adding device, comprising a mobile frame (1), characterized in that: A plurality of material storage tanks (3) are fixedly mounted on the bottom end of the mobile frame (1), and a liquid extraction pipe (4) is connected and mounted on the top ends of the plurality of material storage tanks (3). A vacuum pump body (18) is fixedly mounted on the top end of the mobile frame (1), and a plurality of connecting pipes (17) are connected and mounted on the input end of the vacuum pump body (18), and an exhaust pipe (19) is connected and mounted on the output end of the vacuum pump body (18). A buffer tank (10) is connected and mounted on one end of the plurality of connecting pipes (17), and a liquid infusion hose (11) is connected and mounted on the bottom ends of the plurality of buffer tanks (10). A lifting mechanism is arranged on the top end of the mobile frame (1), and the lifting mechanism comprises a lifting block (16). A lower hopper (12) is fixedly mounted on the side wall of the lifting block (16), and the top end of the lower hopper (12) is connected to the plurality of liquid infusion hoses (11). Solenoid valves (5) are arranged on the plurality of liquid extraction pipes (4).

2. A solar cell etching solution adding device according to claim 1, characterized in that: The lifting mechanism further comprises a slide rail (14), the slide rail (14) being fixedly mounted on the top of the moving frame (1), the interior of the slide rail (14) being rotatably connected to a screw rod (15), the lifting block (16) being threadedly connected to the screw rod (15), a motor (13) being fixedly mounted on the top of the moving frame (1), and an output end of the motor (13) being drivingly connected to the screw rod (15).

3. A solar cell etching solution adding device according to claim 1, characterized in that: A one-way valve (23) is arranged inside the infusion hose (11).

4. A solar cell etching solution adding device according to claim 1, characterized in that: The buffer tank (10) is provided with an inclined surface (20) inside, and a liquid outlet (21) is provided at the bottom end of the buffer tank (10), and the liquid outlet (21) is connected to the infusion hose (11).

5. The device for adding etching solution to a solar cell according to claim 1, characterized in that: A counterweight block (22) is fixedly mounted on the bottom end of the mobile frame (1), wheels (2) are rollably mounted on the bottom end of the mobile frame (1), and a limiting component is disposed on one side of the mobile frame (1).

6. A solar cell etching solution adding device according to claim 5, characterized in that: The limiting assembly comprises a fixing plate (6), wherein the fixing plate (6) is fixedly mounted on the side wall of the movable frame (1), a bolt (7) is threadedly mounted on the fixing plate (6), the bottom end of the bolt (7) is fixedly connected to an anti-skid plate (8), and the bottom end of the anti-skid plate (8) is provided with an anti-skid protrusion (9).

Images