Borosilicate glass removal device

Abstract

This utility model relates to a borosilicate glass removal device, comprising a heating component, a water film component, and an etching component. The heating component heats pure water; the water film component includes a water storage tank and a spray nozzle, with the water storage tank and the spray nozzle connected in communication with the heating component and the water storage tank, respectively; the etching component is located downstream of the water film component. By incorporating the heating component and the water film component, the pure water heated by the heating component can be sprayed onto the surface of the solar cell through the spray nozzle, resulting in a water film with a certain temperature on the solar cell surface. This warm water film not only effectively covers the surface of the solar cell but also transfers heat to the solar cell, thereby accelerating the reaction rate between the borosilicate glass and hydrofluoric acid, increasing the borosilicate glass removal efficiency while reducing the amount of hydrofluoric acid used and lowering production costs.

Description

Technical Field

[0001] This utility model relates to the field of solar cell manufacturing technology, and in particular to a borosilicate glass removal device. Background Technology

[0002] In the solar cell manufacturing process, the boron diffusion process forms a layer of borosilicate glass on the surface of the solar cell. The back and sides of the solar cell are not the primary light-absorbing areas, and the borosilicate glass on these surfaces reflects incident light, reducing the photoelectric conversion efficiency of the solar cell. Therefore, hydrofluoric acid etching is needed to remove the borosilicate glass from the back and sides of the solar cell, leaving only the borosilicate glass on the front side. However, existing borosilicate glass removal devices have low hydrofluoric acid reaction rates and high consumption rates, increasing the production cost of solar cells. Utility Model Content

[0003] Therefore, it is necessary to provide a borosilicate glass removal device that improves upon the aforementioned deficiencies, addressing the problems of low hydrofluoric acid reaction rate and high consumption in existing borosilicate glass removal devices.

[0004] This application provides a borosilicate glass removal device, comprising:

[0005] Heating unit for heating pure water;

[0006] A water film assembly includes a water storage tank and a spraying component. The water storage tank is connected to the heating assembly and is used to store heated pure water. The spraying component is connected to the water storage tank and is used to spray the pure water onto the surface of a solar cell to form a water film on the solar cell surface.

[0007] An etching component, located downstream of the water film component, is used to etch and remove the borosilicate glass from the surface of the solar cell.

[0008] By incorporating heating and water film components, heated pure water is sprayed onto the surface of the solar cells through a spray system, resulting in a water film with a certain temperature. This warm water film not only effectively covers the surface of the solar cells but also transfers heat to them, thereby accelerating the reaction rate between the solar cells and hydrofluoric acid. This, in turn, reduces the amount of hydrofluoric acid used and lowers production costs.

[0009] In some embodiments, the temperature of the pure water in the water storage tank is greater than or equal to 40°C and less than or equal to 50°C.

[0010] In some embodiments, the water film assembly further includes a temperature measuring element disposed in the water storage tank for measuring the temperature of the pure water in the water storage tank.

[0011] In some embodiments, the water film assembly further includes a conveying element, the conveying element comprising:

[0012] A first conveying pipe, one end of which is connected to the heating assembly and the other end of which is connected to the water storage tank, is used to convey the heated pure water; and

[0013] The first valve is located in the first delivery pipeline.

[0014] In some embodiments, the conveyor further includes:

[0015] A second delivery pipe is connected to the water storage tank to deliver the pure water at room temperature; and

[0016] The second valve is located in the second delivery pipeline.

[0017] In some embodiments, the water film assembly further includes a control element communicatively connected to the temperature sensor, the first valve, and the second valve to adjust the opening degree of the first valve and the second valve based on the measurement value of the temperature sensor.

[0018] In some embodiments, the water film assembly further includes a level measuring element disposed in the water storage tank for measuring the level of the pure water in the water storage tank.

[0019] In some embodiments, the spray element includes:

[0020] A spray tank is connected to the water storage tank; and

[0021] Multiple spray nozzles are spaced apart at the bottom of the spray tank to spray the pure water in the spray tank onto the surface of the solar cell.

[0022] In some embodiments, the water film assembly further includes a buffer, the buffer comprising:

[0023] A buffer tank, one end of which is connected to the water storage tank, and the other end of which is connected to the spray tank; and

[0024] An exhaust pipe is provided, with one end connected to the top surface of the spray tank and the other end connected to the upper part of the buffer tank.

[0025] In some embodiments, the borosilicate glass removal apparatus further includes a conveying component disposed on one side of the water film assembly to convey the solar cell sequentially through the water film assembly and the etching component. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the borosilicate glass removal device in an embodiment of the present invention;

[0027] Figure 2 for Figure 1 The left view;

[0028] Figure 3 for Figure 1 The main view;

[0029] Figure 4 for Figure 3 Sectional view along AA;

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Borosilicate glass removal device; 11. Heating assembly; 12. Water film assembly; 121. Water storage tank; 122. Spraying component; 1221. Spray tank; 1222. Spray nozzle; 123. Temperature measuring component; 124. Conveying component; 1241. First conveying pipe; 1242. Second conveying pipe; 1243. First valve; 1244. Second valve; 125. Control component; 126. Liquid level measuring component; 1261. High liquid level sensor; 1262. Low liquid level sensor; 127. Buffer component; 1271. Buffer tank; 1272. Exhaust pipe; 13. Etching assembly; 14. Conveying assembly;

[0032] 2 solar cells;

[0033] 3. Water film. Detailed Implementation

[0034] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0040] To better understand the embodiments of this application, the following is combined with... Figures 1 to 4 The embodiments of this application will be described in detail.

[0041] like Figures 1 to 4As shown, this application provides a borosilicate glass removal device 1, including a heating component 11, a water film component 12, and an etching component 13. The heating component 11 is used to heat pure water; the water film component 12 includes a water storage tank 121 and a spray component 122. The water storage tank 121 is connected to the heating component 11 and is used to store the heated pure water. The spray component 122 is connected to the water storage tank 121 and is used to spray the pure water onto the surface of the solar cell 2 to form a water film 3 on the surface of the solar cell 2; the etching component 13 is located downstream of the water film component 12 and is used to etch and remove the borosilicate glass from the surface of the solar cell.

[0042] In the process of removing borosilicate glass from the surface of solar cell 2 using hydrofluoric acid, increasing the reaction temperature can significantly improve the reaction rate between hydrofluoric acid and borosilicate glass, thereby accelerating the removal efficiency. Although directly heating hydrofluoric acid can increase the reaction rate between hydrofluoric acid and borosilicate glass, the low boiling point of hydrofluoric acid leads to its volatilization during heating, polluting the environment and increasing consumption and production costs.

[0043] This application utilizes heating component 11 to heat pure water, thereby giving the water film 3 formed on the surface of solar cell 2 a certain temperature. Subsequently, the temperature of the water film 3 can be transferred to solar cell 2, accelerating the reaction rate between the borosilicate glass and hydrofluoric acid on the surface of solar cell 2 where the water film 3 has not yet formed. This accelerates the removal speed of borosilicate glass while also reducing the volatilization of hydrofluoric acid, thereby reducing the consumption of hydrofluoric acid and saving costs.

[0044] The water film assembly 12 includes a water storage tank 121 and a spray element 122. The water storage tank 121 is connected to the heating element 11 to store pure water heated by the heating element 11, providing a stable and sufficient supply of pure water for the water film assembly 12. The spray element 122 is connected to the water storage tank 121 and is used to uniformly spray the warm pure water in the water storage tank 121 onto the surface of the solar cell 2, thereby forming a uniform warm water film 3 on the surface of the solar cell 2.

[0045] By forming a water film 3 on the surface of the solar cell 2, the water film 3 can transfer the heat it contains to other surfaces of the solar cell 2, thereby increasing the reaction rate between the borosilicate glass and hydrofluoric acid on these surfaces. This improves the removal efficiency of the borosilicate glass while reducing the consumption of hydrofluoric acid. Furthermore, the water film 3 on the surface of the solar cell 2 can prevent hydrofluoric acid from contacting the borosilicate glass on the side where the water film 3 is formed. During the removal of borosilicate glass from other surfaces, the water film 3 protects that surface, enabling targeted removal of the borosilicate glass from the surface of the solar cell 2.

[0046] Etching component 13 refers to a component that uses a solution such as hydrofluoric acid to react with the borosilicate glass on the surface of the solar cell 2, thereby removing the borosilicate glass. Etching component 13 is located downstream of water film component 12; that is, before the etching process, a water film 3 with a certain temperature has already been formed on the surface of the solar cell 2 through water film component 12. The warm water film 3 can transfer heat to the surface of the solar cell 2, thereby increasing the reaction rate between the borosilicate glass and hydrofluoric acid.

[0047] By setting up a heating component 11 and a water film component 12, pure water heated by the heating component 11 is sprayed onto the surface of the solar cell 2 through a sprayer 122, so that the water film 3 formed on the surface of the solar cell 2 has a certain temperature. This warm water film 3 can not only effectively cover the surface of the solar cell 2, but also transfer heat to the solar cell 2, thereby accelerating the reaction rate between the borosilicate glass and hydrofluoric acid in the solar cell 2, increasing the removal efficiency of the borosilicate glass, and reducing the amount of hydrofluoric acid used, thus reducing production costs.

[0048] In some embodiments, the temperature of the pure water in the water storage tank 121 is greater than or equal to 40°C and less than or equal to 50°C.

[0049] When the temperature of pure water is less than 40°C, less heat is transferred to the surface of solar cell 2, resulting in an insignificant increase in the reaction rate between hydrofluoric acid and borosilicate glass. When the temperature of pure water is greater than 50°C, excessive heat is transferred to solar cell 2, causing the surface temperature of solar cell 2 to become too high, resulting in a large amount of hydrofluoric acid volatilizing and increasing the consumption of hydrofluoric acid.

[0050] Therefore, setting the temperature of the pure water in the water storage tank 121 to be greater than or equal to 40°C and less than or equal to 50°C can both increase the reaction rate between the borosilicate glass on the surface of the solar cell 2 and hydrofluoric acid, and avoid the large-scale volatilization of hydrofluoric acid, thus achieving the best production efficiency.

[0051] like Figure 2 and Figure 4 As shown, in some embodiments, the water film assembly 12 further includes a temperature measuring element 123 disposed in the water storage tank 121 for measuring the temperature of pure water in the water storage tank 121.

[0052] By installing a temperature sensor 123 in the water storage tank 121, the temperature of the pure water in the water storage tank 121 can be accurately measured, ensuring that it is always kept within the set range. This prevents the temperature of the pure water in the water storage tank 121 from being too low, which would reduce the reaction rate between hydrofluoric acid and borosilicate glass, and also avoids the temperature of the pure water in the water storage tank 121 from being too high, which would cause hydrofluoric acid to volatilize and increase the consumption of hydrofluoric acid.

[0053] like Figures 1 to 4As shown, in some embodiments, the water film assembly 12 further includes a conveying component 124, which includes a first conveying pipe 1241 and a first valve 1243. One end of the first conveying pipe 1241 is connected to the heating assembly 11, and the other end is connected to the water storage tank 121 to convey heated pure water; the first valve 1243 is disposed on the first conveying pipe 1241.

[0054] The first conveying pipe 1241 is connected at one end to the heating component 11 and at the other end to the water storage tank 121. That is, the heating component 11 and the water storage tank 121 are connected via the first conveying pipe 1241 to convey the pure water heated by the heating component 11 to the water storage tank 121. Specifically, the cross-section of the first conveying pipe 1241 can be a regular shape such as a circle or square, or an irregular shape composed of straight lines and / or curves. This embodiment does not impose any limitations on this.

[0055] The first valve 1243 is disposed on the first conveying pipe 1241 and is used to control the opening degree of the first conveying pipe 1241, thereby controlling the flow rate of pure water conveyed by the first conveying pipe 1241 and ensuring that the water level and water temperature in the water storage tank 121 are maintained within a preset range. Specifically, the first valve 1243 can be a solenoid valve, a pneumatic valve, or a hydraulic valve, etc., and this embodiment does not limit it.

[0056] By setting the first delivery pipe 1241 and the first valve 1243, the flow rate of pure water input into the water storage tank 121 can be precisely controlled. This can prevent the pure water content in the water storage tank 121 from being too low and affecting the spraying effect of the spraying component 122, and also prevent the pure water content in the water storage tank 121 from being too high and overflowing from the water storage tank 121.

[0057] like Figures 1 to 4 As shown, in some embodiments, the conveying component 124 further includes a second conveying pipe 1242 and a second valve 1244. The second conveying pipe 1242 is connected to the water storage tank 121 to convey pure water; the second valve 1244 is disposed on the second conveying pipe 1244.

[0058] The second conveying pipe 1242 is connected to the water storage tank 121 to convey pure water at room temperature to the water storage tank 121. That is, heated pure water and pure water at room temperature are conveyed to the water storage tank through the first conveying pipe 1241 and the second conveying pipe 1242 respectively, which can realize the regulation of the pure water temperature in the water storage tank 121. Similarly, the cross-section of the second conveying pipe 1242 can be a regular shape such as a circle or square, or it can be an irregular shape composed of straight lines and / or curves. This application embodiment does not limit this.

[0059] The second valve 1244 is disposed in the second conveying pipe 1242 and is used to control the opening degree of the second conveying pipe 1242, thereby controlling the flow rate of pure water conveyed by the second conveying pipe 1242, and thus adjusting the ratio between room temperature pure water and heated pure water, thereby ensuring that the temperature of pure water in the water storage tank 121 is maintained within a preset range. Specifically, the second valve 1244 can be a solenoid valve, a pneumatic valve, or a hydraulic valve, etc., and this embodiment of the application does not limit this.

[0060] By setting up the second conveying pipe 1242 and the second valve 1244, the conveying and flow regulation of room temperature pure water can be realized, facilitating the adjustment of the ratio between heated pure water and room temperature pure water in the water storage tank 121, thereby controlling the temperature of the pure water in the water storage tank 121 and maintaining it within a preset temperature range. Furthermore, since the second conveying channel 1243 and the second valve 1244 are used to convey and control the flow of room temperature pure water in the water storage tank 121, there is no need to strictly control the heating temperature of the pure water conveyed from the first conveying pipe 1241. This allows the borosilicate glass removal device 1 to share the same heating component 11 with other processes, thus simplifying the structure of the solar cell 2 production equipment.

[0061] like Figure 1 , 2 As shown in Figure 4, in some embodiments, the water film assembly 12 further includes a control element 125, which is communicatively connected to the temperature measuring element 123, the first valve 1243, and the second valve 1244 to adjust the opening degree of the first valve 1243 and the second valve 1244 according to the measured value of the temperature measuring element 123.

[0062] The control unit 125 is communicatively connected to the temperature measuring element 123, the first valve 1243, and the second valve 1244. That is, the control unit 125 can receive the temperature data measured by the temperature measuring element 123 in real time and automatically adjust the opening of the first valve 1243 and the second valve 1244 according to the preset temperature range, so as to ensure that the temperature of pure water in the water storage tank 121 is kept within the preset range. For example, when the temperature of the pure water measured by the temperature measuring element 123 is lower than the preset range, the control element 125 controls the opening of the first valve 1243 to increase or the opening of the second valve 1244 to decrease, thereby increasing the flow rate of heated pure water flowing into the water storage tank 121 or decreasing the flow rate of room temperature pure water flowing into the water storage tank 121, thereby increasing the temperature of the pure water in the water storage tank 121 and maintaining it within the preset range; while when the temperature of the pure water measured by the temperature measuring element 123 is higher than the preset range, the control element 125 controls the opening of the first valve 1243 to decrease or the opening of the second valve 1244 to increase, thereby decreasing the flow rate of heated pure water flowing into the water storage tank 121 or increasing the flow rate of room temperature pure water flowing into the water storage tank 121, thereby decreasing the temperature of the pure water in the water storage tank 121 and maintaining it within the preset range.

[0063] By setting up a control component 125 and communicating it with the temperature measuring component 123, the first valve 1243 and the second valve 1244, the opening degree of the first valve 1243 and the second valve 1244 can be adjusted in real time according to the detection result of the measuring component 123, so as to realize the real-time adjustment of the pure water temperature in the water storage tank 121, ensuring that the temperature of the water film formed on the surface of the solar cell 2 is kept within the preset range, which can increase the reaction rate of hydrofluoric acid and borosilicate glass while reducing the volatilization of hydrofluoric acid.

[0064] like Figure 4 As shown, in some embodiments, the water film assembly 12 further includes a liquid level measuring element 126 disposed in the water storage tank 121 for measuring the liquid level of pure water in the water storage tank 121.

[0065] By setting up a liquid level measuring device 126, the content of pure water in the water storage tank 121 can be detected in real time, which facilitates timely replenishment of pure water and ensures a stable and sufficient supply of pure water in the spray device 122.

[0066] In some embodiments, the liquid level measuring element 126 includes a high liquid level measuring element 1261 and a low liquid level measuring element 1262, and the control element 125 is communicatively connected to the high liquid level measuring element 1261 and the low liquid level measuring element 1262. Thus, when the level of pure water in the water storage tank 121 is lower than that of the low liquid level measuring element 1262, the control element 125 can open the first valve 1243 and the second valve 124 to ensure that there is sufficient pure water in the water storage tank 121; and when the level of pure water in the water storage tank 121 is higher than that of the high liquid level measuring element 1261, the control element 125 can close the first valve 1243 and the second valve 1244 to prevent excessive pure water from overflowing from the water storage tank 121.

[0067] Specifically, the level measuring element 126 can be a float-type level gauge, which detects the level of pure water in the water storage tank 121 by the float moving up and down with changes in the liquid level; the level measuring element 126 can also be a pressure-type level gauge, which indirectly measures the level of pure water in the water storage tank 121 by measuring the pressure at the bottom of the liquid. Of course, the level measuring element 126 can also be other components used to measure the liquid level, and this application embodiment does not limit this.

[0068] like Figure 2 and 4 As shown, in some embodiments, the spraying component 122 includes a spraying tank 1221 and a plurality of spray nozzles 1222. The spraying tank 1221 is connected to the water storage tank 121; the plurality of spray nozzles 1222 are spaced apart at the bottom of the spraying tank 1221 to spray pure water in the spraying tank 1221 onto the surface of the solar cell 2.

[0069] The spray tank 1221 is connected to the water storage tank 121 and is used to receive warm pure water supplied by the water storage tank 121. Since multiple spray nozzles 1222 are spaced apart at the bottom of the spray tank 1221, the spray tank 1221 can ensure that the pure water supplied from the water storage tank 121 is evenly distributed to each spray nozzle 1222, avoiding uneven pure water sprayed from the spray nozzles 1222 due to excessive or insufficient local flow, ensuring the continuity and stability of the spraying process, and thus ensuring the uniformity and continuity of the water film 3 formed on the surface of the solar cell 2.

[0070] Multiple spray nozzles 1222 are spaced apart at the bottom of the spray tank 1221. This ensures that pure water can be evenly distributed over the surface of the solar cell 2 through the multiple spray nozzles 1222, forming a uniform, warm water film 3. The number and spacing of the spray nozzles 1222 can be designed according to the size and shape of the solar cell 2, and this embodiment does not limit this. In some embodiments, the spray nozzles 1222 are detachably disposed at the bottom of the spray tank 1221 by means of threaded connection, snap-fit, or other methods, so as to facilitate the disassembly, replacement, and maintenance of the spray nozzles 1222.

[0071] like Figure 1 , 2 As shown in Figures 4 and 5, in some embodiments, the water film assembly 12 further includes a buffer 127, which includes a buffer tank 1271 and an exhaust pipe 1272. One end of the buffer tank 1271 is connected to the water storage tank 121, and the other end is connected to the spray tank 1221; one end of the exhaust pipe 1272 is connected to the top surface of the spray tank 1221, and the other end is connected to the upper part of the buffer tank 1271.

[0072] The buffer tank 1271 is connected at one end to the water storage tank 121 and at the other end to the spray tank 1221. That is, the water storage tank 121 and the spray tank 1221 are connected through the buffer tank 1271, which is used to store pure water supplied from the water storage tank 121. On the one hand, it can buffer the pressure fluctuations between the water storage tank 121 and the spray tank 1221, ensuring that the pure water is in a stable state when it enters the spray tank 1221, and avoiding uneven spraying caused by pressure changes. On the other hand, it can further ensure that the spray tank 1221 has a sufficient supply of pure water.

[0073] One end of the exhaust pipe 1272 is connected to the top surface of the spray tank 1221, and the other end is connected to the upper part of the buffer tank 1271. By installing the exhaust pipe 1272, gas in the spray tank 1221 can be discharged in a timely manner, preventing gas accumulation and uneven spraying. Furthermore, by connecting the other end of the exhaust pipe 1272 to the upper part of the buffer tank 1271, gas can be discharged into the buffer tank 1271, maintaining pressure balance within the spray tank 1221. Simultaneously, pure water mixed with the gas can be returned to the buffer tank 1271, reducing water waste.

[0074] In some embodiments, a third valve is also provided on the exhaust pipe 1272. After the gas in the spray tank 1221 is exhausted, the third valve can be closed to ensure that the pure water in the spray tank 1221 has sufficient pressure, thereby ensuring the uniformity of pure water spraying.

[0075] like Figures 1 to 4 As shown, in some embodiments, the borosilicate glass removal device 1 further includes a conveying component 14 disposed on one side of the water film component 12 to convey the solar cell 2 sequentially through the water film component 12 and the etching component 13.

[0076] The conveying component 14 can be a conveyor belt, chain, or other conveying method, which transports the solar cells 2 along a preset trajectory by moving the conveyor belt or chain; the conveying component 14 can also be a roller, which transports the solar cells 2 by rolling. It should be noted that the conveying component 14 can also be other conveying methods such as a robotic arm, and this embodiment of the application does not limit this.

[0077] By setting up the conveying component 14, the solar cell 2 can be conveyed, so that the solar cell 2 passes through the water film component 12 and the etching component 13 in sequence, completing the water film spraying and borosilicate glass removal process on the surface of the solar cell 2, thereby improving the automation level of the borosilicate glass removal device 1.

[0078] Specifically, such as Figures 1 to 4 As shown, during feeding, the solar cell 2 is placed in the conveying assembly 14 and conveyed along a preset trajectory by the conveying assembly 14.

[0079] The control unit 125 controls the opening of the first valve 1243 and the second valve 1244 based on the measurement results of the temperature measuring unit 123 and the liquid level measuring unit 126. This allows pure water heated by the heating component 11 and pure water at room temperature to be transported to the water storage tank 121 through the first conveying pipe 1241 and the second conveying pipe 1242, respectively, and then to the spray tank 1221. When the solar cell 2 is transported to the position corresponding to the water film component 12, the spray nozzle 1222 opens and sprays warm pure water at a preset temperature onto the surface of the solar cell 2, forming a uniform water film 3 on the surface of the solar cell 2. Subsequently, the conveying component 14 transports the solar cell 2 to the etching component 13. In the etching component 13, hydrofluoric acid comes into contact with the surface of the solar cell 2 that is not sprayed with water film 3, thereby reacting with the borosilicate glass on these surfaces to remove the borosilicate glass. At the same time, the water film 3 formed on the surface of solar cell 2 can prevent hydrofluoric acid from contacting the borosilicate glass on the side where the water film 3 is formed. In the process of removing other surface borosilicate glass, it plays a protective role for these borosilicate glasses, thus achieving targeted removal of the borosilicate glass on the surface of solar cell 2.

[0080] After etching is completed, the transport component 14 transports the solar cell 2 to the subsequent processes.

[0081] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A borosilicate glass removal device, characterized in that, The borosilicate glass removal device includes: Heating unit for heating pure water; A water film assembly includes a water storage tank and a spraying component. The water storage tank is connected to the heating assembly and is used to store heated pure water. The spraying component is connected to the water storage tank and is used to spray the pure water onto the surface of a solar cell to form a water film on the solar cell surface. An etching component, located downstream of the water film component, is used to etch away the borosilicate glass on the surface of the solar cell.

2. The borosilicate glass removal apparatus according to claim 1, characterized in that, The temperature of the pure water in the water storage tank is greater than or equal to 40°C and less than or equal to 50°C.

3. The borosilicate glass removal apparatus according to claim 2, characterized in that, The water film assembly also includes a temperature measuring element disposed in the water storage tank for measuring the temperature of the pure water in the water storage tank.

4. The borosilicate glass removal apparatus according to claim 3, characterized in that, The water film assembly further includes a conveying component, which comprises: A first conveying pipe, one end of which is connected to the heating assembly and the other end of which is connected to the water storage tank, is used to convey the heated pure water; and The first valve is located in the first delivery pipeline.

5. The borosilicate glass removal apparatus according to claim 4, characterized in that, The conveying component also includes: A second delivery pipe is connected to the water storage tank to deliver the pure water at room temperature; and The second valve is located in the second delivery pipeline.

6. The borosilicate glass removal apparatus according to claim 5, characterized in that, The water film assembly also includes a control unit, which is communicatively connected to the temperature measuring element, the first valve, and the second valve to adjust the opening degree of the first valve and the second valve according to the measurement value of the temperature measuring element.

7. The borosilicate glass removal apparatus according to any one of claims 1 to 6, characterized in that, The water film assembly also includes a liquid level measuring device disposed in the water storage tank for measuring the liquid level of the pure water in the water storage tank.

8. The borosilicate glass removal apparatus according to any one of claims 1 to 6, characterized in that, The spray component includes: A spray tank is connected to the water storage tank; and Multiple spray nozzles are spaced apart at the bottom of the spray tank to spray the pure water in the spray tank onto the surface of the solar cell.

9. The borosilicate glass removal apparatus according to claim 8, characterized in that, The water film assembly further includes a buffer, the buffer comprising: A buffer tank, one end of which is connected to the water storage tank and the other end of which is connected to the spray tank; and An exhaust pipe is provided, with one end connected to the top surface of the spray tank and the other end connected to the upper part of the buffer tank.

10. The borosilicate glass removal apparatus according to any one of claims 1 to 6, characterized in that, The borosilicate glass removal device further includes a conveying component disposed on one side of the water film component to convey the solar cell sequentially through the water film component and the etching component.

Images