Solar cell cleaning device

Abstract

The utility model relates to the technical field of solar cells, and provides a solar cell cleaning device which comprises a transmitter and a cleaner. The conveyor comprises a conveyor belt, the conveyor belt is provided with a plurality of solar cell placement areas, the conveyor belt is provided with a plurality of adsorption holes in the solar cell placement areas, and the adsorption holes can be externally connected with a negative pressure device for adsorbing and fixing solar cells. The cleaning device comprises a first spraying device, the first spraying device is arranged above the conveying belt, and the first spraying device is used for conducting spraying cleaning on the solar cell to remove winding plating. The solar cell is adsorbed through the conveying belt, the winding plating is removed in combination with spraying and cleaning, and the winding plating on the side face and the face to be removed of the solar cell can be effectively removed.

Description

Technical Field

[0001] This application relates to the field of solar cell technology, and in particular to a solar cell cleaning device. Background Technology

[0002] Cleaning is an essential part of the solar cell production process. Cleaning processes include texturing, alkaline polishing, and RCA (Radio Corporation of America (RCA) standard cleaning method). Texturing aims to remove surface impurities from the silicon wafer and create a pyramidal textured surface. Alkaline polishing removes the PN junctions wrapped around the back and polishes the back side. RCA removes the front-side coating and cleans away excess structural layers on both sides. Traditionally, RCA cleaning machines use chain conveyors and cleaning tanks. During cleaning, the solar cell's surface to be cleaned is facing down, and rollers carry the cleaning solution. However, this method cannot completely remove the coating from the sides of the solar cell, affecting the cell's quality. Utility Model Content

[0003] Based on this, this application provides a solar cell cleaning device with good solar cell coating removal effect.

[0004] This application provides a solar cell cleaning device, the solar cell cleaning device comprising:

[0005] A conveyor, comprising a conveyor belt and a negative pressure device, wherein the conveyor belt has multiple solar cell placement areas, and the conveyor belt has multiple adsorption holes located in the solar cell placement areas. These adsorption holes can be connected to an external negative pressure device for adsorbing and fixing the solar cells. Furthermore,

[0006] A cleaner, comprising a first sprayer disposed above the conveyor belt, the first sprayer being used to spray and clean the solar cells to remove the coating.

[0007] In some embodiments, the conveyor belt is also provided with a plurality of leakage holes, which are located around the solar cell placement area.

[0008] In some embodiments, the conveyor belt is further provided with limiting members, which are disposed between adjacent solar cell placement areas, and are used to position the solar cells to the solar cell placement areas.

[0009] In some embodiments, the first sprayer includes a cleaning fluid storage tank and at least one spray head connected to the cleaning fluid storage tank and positioned above the conveyor belt.

[0010] In some embodiments, the solar cell cleaning device further includes a collector disposed below the conveyor belt, the collector being used to collect the cleaning fluid after the first sprayer cleans the solar cells.

[0011] In some embodiments, the cleaning fluid storage tank is connected to the collector.

[0012] In some embodiments, the cleaner further includes a blower disposed on the side of the first sprayer near the solar cell outlet end, the blower being used to blow away the cleaning liquid from the surface of the solar cells after they have been cleaned by the first sprayer.

[0013] In some embodiments, the cleaner further includes a second sprayer disposed on the side of the blower near the solar cell outlet end, the second sprayer being used to wash the solar cells after they have been blown by the blower.

[0014] In some embodiments, the solar cell cleaning device further includes a position detector disposed on the side of the first sprayer near the solar cell feed end. The position detector is also electrically connected to the first sprayer and the negative pressure device, respectively. The position detector is used to detect the position of the solar cells on the conveyor belt and to provide feedback to control the start and stop of the first sprayer and the negative pressure device.

[0015] In some embodiments, the solar cell cleaning device further includes an alarm electrically connected to the position detector, which is used to issue an alarm signal when the position detector does not detect a solar cell.

[0016] Compared with traditional technologies, this application has at least the following beneficial effects:

[0017] This application utilizes a conveyor belt with adsorption holes to transport solar cells. The adsorption holes can tightly adhere one side surface of the solar cell to the conveyor belt. When the surface of the solar cell is sprayed and cleaned by the first sprayer, it can not only seal the surface of the solar cell that is tightly attached to the conveyor belt, preventing the cleaning liquid from entering between the solar cell and the conveyor belt and preventing damage to the non-cleaned surface, but also clean the other surfaces and sides of the solar cell. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a solar cell cleaning device provided in one embodiment of this application;

[0019] Figure 2 This is a top view of a conveyor belt in a solar cell cleaning device provided in one embodiment of this application.

[0020] Among them, 100-conveyor; 110-conveyor belt; 111-adsorption hole; 112-leakage hole; 113-limiting component; 120-negative pressure device; 200-cleaner; 210-first sprayer; 211-cleaning fluid storage tank; 212-spray head; 220-purger; 230-second sprayer; 300-solar cell; 400-collector; 500-position detector; 600-alarm. Detailed Implementation

[0021] The present application will be further described in detail below with reference to the accompanying drawings, embodiments, and examples. These embodiments and examples are for illustrative purposes only and are not intended to limit the scope of the present application. The purpose of providing these embodiments and examples is to enable a more thorough and comprehensive understanding of the disclosure of the present application. It should also be understood that the present application can be implemented in many different forms and is not limited to the embodiments and examples described herein. Those skilled in the art can make various modifications or alterations without departing from the spirit of the present application, and the equivalent forms obtained also fall within the protection scope of the present application. Furthermore, numerous specific details are set forth in the following description to provide a fuller understanding of the present application. It should be understood that the present application can be implemented without one or more of these details.

[0022] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," "fixed," and "set" 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. Those skilled in the art can understand the meaning of the above terms in this application according to the specific circumstances.

[0024] In this application, "optionally," "optionally," and "optional" mean that something is optional, that is, it means that it is selected from either "with" or "without." If there are multiple "optional" entries in a technical solution, unless otherwise specified, and there are no contradictions or mutual constraints, each "optional" entry shall be independent.

[0025] In this application, the technical features described in an open-ended manner include both closed technical solutions consisting of the listed features and open technical solutions that include the listed features.

[0026] In this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or quantity, nor should they be construed as implicitly indicating the importance or quantity of the indicated technical features. Moreover, "first," "second," etc., serve only as a non-exhaustive enumeration and should be understood not to constitute a closed limitation on quantity.

[0027] All references to this application are incorporated herein by reference as if each document were individually incorporated herein by reference. Unless they conflict with the purpose and / or technical solution of this application, all cited references are incorporated herein by reference in their entirety and for all purposes. When references are cited in this application, the definitions of relevant technical features, terms, nouns, phrases, etc., are also incorporated herein by reference. Examples and preferred embodiments of the cited technical features may also be incorporated herein by reference, but only to the extent that they enable the implementation of this application. It should be understood that when the cited content conflicts with the description in this application, this application shall prevail or modifications shall be made adaptably to the description in this application.

[0028] In traditional technology, RCA cleaning machines use roller chain machines and tanks. On the roller chain machine, the side of the solar cell that needs to be cleaned is placed face down. The cleaning fluid carried by the rollers cleans the face down surface of the solar cell. To ensure stability during the transport process, the side of the solar cell does not directly contact the rollers. The side coating is difficult to remove, and the coating residue will be carried to the next process. The final solar cell may have problems such as edge leakage, which will affect the yield and quality of the solar cell.

[0029] Based on this, this application provides a solar cell 300 cleaning device, such as... Figure 1 and Figure 2 As shown, the solar cell 300 cleaning device includes a conveyor 100 and a cleaner 200.

[0030] The conveyor 100 includes a conveyor belt 110 and a negative pressure device 120. The conveyor belt 110 has multiple solar cell placement areas, such as... Figure 2 As shown, the conveyor belt 110 in the solar cell placement area has multiple adsorption holes 111. A negative pressure device 120 is connected to the adsorption holes 111, providing adsorption force to the holes 111. The adsorption holes 111 are used to adsorb and fix the solar cells 300. Figure 1As shown, the cleaner 200 includes a first sprayer 210, which is disposed above the conveyor belt 110. The first sprayer 210 is used to spray and clean the solar cell 300 to remove the coating.

[0031] This application utilizes a conveyor belt 110 with adsorption holes 111 to transport solar cells 300. The adsorption holes 111 can tightly adhere one side surface of the solar cell 300 to the conveyor belt 110. When the first sprayer 210 sprays and cleans the surface of the solar cell 300, it can not only seal the surface of the solar cell 300 that is tightly adhered to the conveyor belt 110 to prevent the cleaning liquid from entering between the solar cell 300 and the conveyor belt 110 and preventing damage to the non-cleaned surface, but also clean the other surfaces and sides of the solar cell 300.

[0032] In some embodiments, the adsorption holes 111 are arranged in an array on the solar cell placement area, for example, in a rectangular array or a circular array. Figure 2 As shown, two rows of adsorption holes 111 are arranged side by side on the solar cell placement area.

[0033] Optionally, the average pore size of the adsorption pore 111 is 0.2cm to 1.0cm, for example, it can be 0.2cm, 0.3cm, 0.4cm, 0.5cm, 0.6cm, 0.7cm, 0.8cm, 0.9cm or 1.0cm.

[0034] Optionally, the distance between adjacent adsorption pores 111 is 18.2cm to 21.0cm, for example, it can be 18.2cm, 18.5cm, 18.8cm, 19.2cm, 19.5cm, 19.8cm, 20.1cm, 20.4cm, 20.7cm or 21.0cm.

[0035] In some embodiments, the conveyor belt 110 is further provided with a plurality of drainage holes 112, which are located around the solar cell placement area. Optionally, the drainage holes 112 are located between adjacent solar cell placement areas. By providing drainage holes 112 on the conveyor belt 110, the cleaning fluid remaining on the conveyor belt 110 after spraying can flow out through the drainage holes 112, reducing the amount of cleaning fluid remaining on the conveyor belt 110.

[0036] Optionally, the average diameter of the leakage hole 112 is 3cm to 6cm, for example, it can be 3.0cm, 3.3cm, 3.6cm, 3.9cm, 4.2cm, 4.5cm, 4.8cm, 5.1cm, 5.4cm, 5.7cm or 6.0cm.

[0037] In some embodiments, such as Figure 1 and Figure 2As shown, a limiting member 113 is also provided on the conveyor belt 110. The limiting member 113 is disposed between adjacent solar cell placement areas and is used to position the solar cell 300 to the solar cell placement area. Optionally, the limiting member 113 includes a baffle disposed between the solar cell placement areas. This application positions the solar cell 300 by providing the limiting member 113 on the conveyor belt 110, thereby ensuring that the solar cell 300 is positioned on the solar cell placement area and that the solar cell 300 completely covers the adsorption hole 111.

[0038] In some embodiments, such as Figure 1 As shown, the first sprayer 210 includes a cleaning fluid storage tank 211 and at least one spray head 212. The spray head 212 is connected to the cleaning fluid storage tank 211 and is located above the conveyor belt 110. This application removes the surface coating of the solar cell 300 by spraying. Spray cleaning can evenly spray the cleaning fluid onto the upper surface and sides of the solar cell 300, thereby effectively removing the surface coating and side coating.

[0039] In some embodiments, such as Figure 1 As shown, the solar cell 300 cleaning device also includes a collector 400, which is located below the conveyor belt 110. The collector 400 is used to collect the cleaning fluid after the first sprayer 210 cleans the solar cell 300.

[0040] In some embodiments, such as Figure 1 As shown, the cleaning fluid storage tank 211 is connected to the collector 400. This application utilizes the collector 400 to recover the cleaning fluid after cleaning the solar cell 300, reducing waste of the cleaning fluid.

[0041] In some embodiments, such as Figure 1 As shown, the cleaner 200 also includes a blower 220, which is disposed on the side of the first sprayer 210 near the discharge end of the solar cell 300. The blower 220 is used to blow away the cleaning liquid from the surface of the solar cell 300 after it has been cleaned by the first sprayer 210. Optionally, the blower 220 includes an air pump and at least one jetting element, which is connected to the air pump and is used to blow away the cleaning liquid from the surface of the solar cell 300. This application utilizes a blowing method to remove residual cleaning liquid from the surface of the solar cell 300, enabling further recovery of the cleaning liquid.

[0042] In some embodiments, the solar cell 300, after being purged, also requires a water washing process. This washing can be performed by immersion in a water washing tank or by spray washing. For example... Figure 1As shown, the cleaner 200 of this application also includes a second sprayer 230, which is disposed on the side of the blower 220 near the discharge end of the solar cell 300. The second sprayer 230 is used to wash the solar cell 300 after it has been blown by the blower 220. Optionally, the second sprayer 230 includes a water washing spray head 212 and a water tank, and uses water washing spray to wash the solar cell 300 to ensure the washing effect.

[0043] In some embodiments, such as Figure 1 As shown, the solar cell 300 cleaning device also includes a position detector 500. The position detector 500 is located on the side of the first sprayer 210 near the feed end of the solar cell 300. The position detector 500 is also electrically connected to the first sprayer 210 and the negative pressure device 120. The position detector 500 is used to detect the position of the solar cell 300 on the conveyor belt 110 and to provide feedback to control the start and stop of the first sprayer 210 and the negative pressure device 120. Optionally, the position detector 500 is also connected to a controller, which receives the signal from the position detector 500 and, after analysis, controls the negative pressure device 120 and the first sprayer 210 respectively.

[0044] Optionally, the position detector 500 can be an infrared detector. This application utilizes the position detector 500 to detect the transport position of the solar cell 300, thereby controlling the start and stop of the negative pressure unit 120 and the first sprayer 210 based on the transport position. For example, when the position detector 500 detects that the solar cell 300 is close to the spray area of ​​the first sprayer 210, the negative pressure unit 120 is activated, causing the solar cell 300 to adhere to the conveyor belt 110, and then the first sprayer 210 is activated to spray and clean the solar cell 300; when the position detector 500 detects that the solar cell 300 has left the spray area, the first sprayer 210 is turned off.

[0045] In some embodiments, such as Figure 1 As shown, the solar cell 300 cleaning device also includes an alarm 600, which is electrically connected to the position detector 500. When the position detector 500 does not detect the solar cell 300, the alarm 600 is used to issue an alarm signal.

[0046] In some embodiments, a dryer (not shown in the figure) is also provided on the side of the second sprayer 230 near the discharge end of the solar cell 300, and the solar cell 300 is dried using the dryer. It is understood that the dryer may be independently installed outside the solar cell 300 cleaning device.

[0047] It is understood that by connecting the aforementioned transmitter 100, cleaner 200, position detector 500, and alarm 600 to the controller, the controller can receive the detection signal from the position detector 500 or the input signal from the device, thereby providing feedback control over the operation of the transmitter 100, cleaner 200, and alarm 600.

[0048] Exemplarily, a method for cleaning a solar cell 300 using the aforementioned solar cell 300 cleaning device is provided, comprising the following steps:

[0049] The solar cell 300 is conveyed onto the conveyor belt 110, and the solar cell 300 is positioned on the solar cell placement area of ​​the conveyor belt 110 by the limiting member 113.

[0050] When the position detector 500 detects that the solar cell 300 has been delivered to the spraying area of ​​the first sprayer 210, the negative pressure device 120 and the first sprayer 210 are activated to adsorb the solar cell 300 tightly onto the conveyor belt 110 and perform spray cleaning.

[0051] When the position detector 500 detects that the solar cell 300 has left the spray area, the first sprayer 210 is turned off, and the solar cell 300 continues to be transported to the purging area. In the purging area, the solar cell 300 is purged by the purging device 220 to remove the cleaning liquid remaining on the surface. The cleaning liquid leaks into the collector 400 through the drain hole 112. Then the solar cell 300 is transported to the water washing area, where the solar cell 300 is water washed by the second sprayer 230. Furthermore, it can also be dried.

[0052] If the position detector 500 fails to detect the solar cell 300 within a predetermined time, it will send an alarm signal to the alarm 600 to remind the operator to check.

[0053] In summary, this application utilizes a conveyor belt 110 with adsorption holes 111 to transport solar cells 300. The adsorption holes 111 can tightly adhere one side surface of the solar cell 300 to the conveyor belt 110. When the first sprayer 210 sprays and cleans the surface of the solar cell 300, it can not only seal the surface of the solar cell 300 tightly adhering to the conveyor belt 110 to prevent the cleaning liquid from entering between the solar cell 300 and the conveyor belt 110 and preventing damage to the non-cleaned surface, but also clean the other surfaces and sides of the solar cell 300.

[0054] 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.

[0055] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A solar cell cleaning apparatus, characterized by comprising: The solar cell cleaning device comprises: a conveyor (100) comprising a conveyor belt (110) having a plurality of solar cell placement areas, the conveyor belt (110) being provided with a plurality of suction holes (111) at the solar cell placement areas, the suction holes (111) being capable of externally connecting a negative pressure device (120) for adsorbing and fixing a solar cell (300); and a cleaner (200) comprising a first sprayer (210) arranged above the conveyor belt (110), the first sprayer (210) being used for spraying and cleaning the solar cell (300) to remove plating.

2. The solar cell cleaning apparatus according to claim 1, wherein The conveyor belt (110) is further provided with a plurality of liquid leakage holes (112) around the solar cell placement areas.

3. The solar cell cleaning apparatus according to claim 1, wherein The conveyor belt (110) is further provided with a limiting member (113) arranged between adjacent solar cell placement areas, the limiting member (113) being used for positioning the solar cell (300) to the solar cell placement area.

4. The solar cell cleaning apparatus according to claim 1, wherein The first sprayer (210) comprises a cleaning liquid storage tank (211) and at least one spray head (212), the spray head (212) being connected with the cleaning liquid storage tank (211), and the spray head (212) being arranged above the conveyor belt (110).

5. The solar cell cleaning apparatus according to claim 4, wherein The solar cell cleaning device further comprises a collector (400) arranged below the conveyor belt (110), the collector (400) being used for collecting the cleaning liquid after the solar cell (300) is cleaned by the first sprayer (210).

6. The solar cell cleaning apparatus according to claim 5, wherein The cleaning liquid storage tank (211) is connected with the collector (400).

7. The solar cell cleaning apparatus according to claim 1, wherein The cleaner (200) further comprises a purging device (220) arranged at one side of the first sprayer (210) close to the discharging end of the solar cell (300), the purging device (220) being used for purging the solar cell (300) cleaned by the first sprayer (210) to remove the cleaning liquid on the surface.

8. The solar cell cleaning apparatus according to claim 7, wherein The cleaner (200) further comprises a second sprayer (230) arranged at one side of the purging device (220) close to the discharging end of the solar cell (300), the second sprayer (230) being used for spraying and washing the solar cell (300) purged by the purging device (220).

9. The solar cell cleaning apparatus according to any one of claims 1 to 8, wherein The solar cell cleaning device further comprises a position detector (500) arranged at one side of the first sprayer (210) close to the feeding end of the solar cell (300), the position detector (500) being further electrically connected with the first sprayer (210) and the negative pressure device (120), respectively, the position detector (500) being used for detecting the position of the solar cell (300) on the conveyor belt (110) and feeding back to control the start and stop of the first sprayer (210) and the negative pressure device (120).

10. The solar cell cleaning apparatus of claim 9, wherein The solar cell cleaning device further comprises an alarm (600) electrically connected with the position detector (500), and the alarm (600) is used for sending an alarm signal when the position detector (500) does not detect the solar cell (300).

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