Dust removal mechanism and solar cell edge cleaning device

Abstract

The invention relates to a dust removal mechanism and a solar cell edge cleaning device. In the edge cleaning operation of a solar cell, an air blowing port and a suction port of a dust removal assembly both face an area to be subjected to edge cleaning of the solar cell; then, ventilation can be performed on the air inlet member and suction can be performed on the discharge member. At the moment, air can be blown into the area to be subjected to edge cleaning from the air blowing opening, and dust generated in the edge cleaning operation is blown up; and meanwhile, negative pressure is formed at the suction opening through suction of the discharging piece, and blown dust is sucked away in time. Due to the fact that the air blowing port and the air inlet piece are introduced in the dust removal process, air blowing can be carried out on the area to be subjected to edge cleaning while suction is carried out, the probability that dust is sucked away can be improved, the negative pressure effect of the suction port on the area to be subjected to edge cleaning can be relatively weakened, the suction port can be relatively closer to the area to be subjected to edge cleaning, the probability that dust escapes is reduced, and the dust removal efficiency is improved. The dedusting effect is effectively improved, and the influence on the solar cell performance is reduced.

Description

Technical Field

[0001] This application relates to the field of solar cell manufacturing technology, and in particular to dust removal mechanisms and solar cell edge cleaning devices. Background Technology

[0002] In the production of solar cells, after various functional thin films are fabricated on a glass substrate, an edge-cleaning operation is required around the substrate. For example, a certain area around the glass perimeter may be removed using laser etching. Simultaneously, a dust removal device is typically installed to promptly remove the dust generated during laser etching. However, due to the structural design limitations of traditional dust removal devices, dust can easily escape and fall onto the thin film, affecting the performance of the solar cell. Summary of the Invention

[0003] Therefore, it is necessary to provide a dust removal mechanism and a solar cell edge cleaning device to reduce the probability of dust escape, improve the dust removal effect, and reduce the impact on the performance of solar cells.

[0004] In a first aspect, this application provides a dust removal mechanism, which includes: a dust removal component having an air blowing port and a suction port, both of which are configured to face the area to be cleaned on the solar cell; an air inlet and an air outlet, both of which are disposed on the dust removal component, the air inlet being connected to the air blowing port and the air outlet being connected to the suction port.

[0005] In the aforementioned dust removal mechanism, during the edge cleaning operation of solar cells, both the air inlet and suction outlet of the dust removal component are directed towards the area of ​​the solar cell to be cleaned. Then, air is circulated through the inlet and suction is applied to the outlet. At this time, gas is blown from the air inlet towards the area to be cleaned, stirring up the dust generated during the edge cleaning process. Simultaneously, the suction from the outlet creates a negative pressure at the suction outlet, promptly removing the blown-up dust. Because air inlets and inlets are introduced during dust removal, air can be blown into the area to be cleaned while suction is applied. This not only increases the probability of dust removal but also relatively weakens the negative pressure effect of the suction outlet on the area to be cleaned, allowing the suction outlet to be closer to the area, thereby reducing the chance of dust escape. This design effectively improves the dust removal effect and reduces the impact on the performance of the solar cells.

[0006] In some embodiments, the dust removal assembly has a first chamber and a second chamber separated from each other. The air inlet is connected to the air blowing port through the first chamber, and the exhaust port is connected to the suction port through the second chamber. This design, with the introduction of the first chamber and the second chamber respectively, allows for stable gas flow between the air inlet and the air blowing port, and stable dust flow between the suction port and the exhaust port, thereby ensuring stable dust removal operations.

[0007] In some embodiments, the first cavity includes an air inlet channel and a drainage channel sequentially connected along a first direction. The drainage channel is connected to the air blowing port, and the air inlet channel is connected to the air inlet component. The closer the end of the air inlet channel to the drainage channel is to the drainage channel, the smaller the flow area. This design, by introducing the air inlet channel and the drainage channel, allows the gas to gradually contract and be constrained before being smoothly output to the air blowing port under the action of the drainage channel. This reduces the probability of turbulence caused by direct impact on the air blowing port, thus allowing the dust in the area to be cleaned to be blown up more orderly. Simultaneously, a smaller flow area results in a relatively increased gas velocity, which can relatively increase the blowing force at the air blowing port, improving the dust removal effect.

[0008] In some embodiments, the two ends of the drainage channel along the second direction are respectively connected to the air blowing port and the air inlet channel. The second direction is configured to be inclined relative to the first direction, and the end of the drainage channel connected to the air blowing port is closer to the suction port than the end of the drainage channel connected to the air inlet channel. With this design, the inclined air blowing can blow most of the dust in the area to be cleaned toward the side of the suction port, making it easier for the dust to be drawn away by the suction port and improving the dust removal effect.

[0009] In some embodiments, the angle between the first direction and the second direction is denoted as θ, where 10°≤θ≤60°. This design controls the angle between the first direction and the second direction to be between 10° and 60°, allowing the gas to be blown out at a reasonable angle, making it easier for dust to be drawn away by the suction port and improving the dust removal effect.

[0010] In some embodiments, the cavity wall of the first cavity includes a first wall and a second wall opposite each other along a third direction, a flow-blocking portion protruding from the first wall, and a flow-guiding portion protruding from the second wall. The first wall is closer to the second cavity than the second wall. The flow-blocking portion is located upstream of the flow-guiding portion along a first direction, and the projections of the two along the first direction at least partially overlap. An air intake channel is formed between the portions of the first wall, the flow-blocking portion, the second wall, and the flow-guiding portion away from the air outlet, and a flow-guiding channel is formed between the flow-blocking portion and the flow-guiding portion. The third direction intersects with the first direction. With this design, the flow-blocking portion can block the flow-guiding channel in the first direction, so that some of the gas in the air intake channel will be blocked by the flow-blocking portion before entering the flow-guiding channel, reducing the probability of gas directly impacting the flow-guiding channel and causing turbulence, thereby allowing the gas to flow out of the air outlet smoothly.

[0011] In some embodiments, the flow-blocking portion includes a flow-blocking surface disposed opposite to the flow-guiding portion along a first direction. The flow-blocking surface includes a second end and a first end sequentially distributed along the first direction. The flow-blocking surface is inclined relative to the first direction, and the first end is more biased towards the second wall than the second end. This design, by introducing the flow-blocking surface, facilitates a more stable contraction of some gas in the air intake channel, allowing the gas to enter the flow-guiding channel stably and improving the stability of the blowing.

[0012] In some embodiments, the flow-blocking portion includes a mating surface disposed along a first direction toward the flow-guiding portion. The mating surface includes a third end and a fourth end sequentially distributed along the first direction. The mating surface is inclined relative to the first direction, and the third end is more biased toward the second wall than the fourth end. This design causes the gas from the air outlet to be blown out at an angle, thereby causing at least a portion of the dust in the area to be cleaned to be blown to one side, facilitating its collection and extraction, and improving the dust removal effect.

[0013] In some embodiments, the distance between the mating surface and the drainage section is denoted as D1, and the distance between the third end and the fourth end of the mating surface is denoted as L0, where L0 / D1≥5. This design ensures that the ratio of distance L0 to spacing D1 is greater than or equal to 5, making the drainage channel appear as or approximately as a slit structure, allowing the gas to be blown out of the air outlet more smoothly, further improving the dust blowing effect.

[0014] In some embodiments, the dust removal assembly further includes a blocking protrusion that protrudes from the cavity wall of the air intake channel. This design introduces the blocking protrusion to slow down the flow of gas in the air intake channel, reducing the probability of turbulence occurring when gas enters the air intake channel; at the same time, it also allows the incoming gas to be evenly dispersed under the action of the blocking protrusion, making it easier for the gas to better fill the air blowing port.

[0015] In some embodiments, the blocking protrusions include a plurality of protrusions, which are spaced apart along a first direction to form at least two protrusion groups. The blocking protrusions in each protrusion group are arranged side by side and spaced apart to form a flow gap between two adjacent blocking protrusions. In two adjacent protrusion groups, the flow gap in one group is staggered from the flow gap in the other group in the first direction. This design staggers the flow gaps in two adjacent protrusion groups, so that the flow of gas in each protrusion group is slowed down in turn, further reducing the probability of turbulence. At the same time, it also better drives the gas to be more uniformly dispersed, making the blowing more stable.

[0016] In some embodiments, the dust removal assembly includes a first base, a second base, and a partition disposed between the first base and the second base. The partition forms a first cavity and a second cavity with the first base and the second base, respectively, and one end of the partition forms an air blowing port and a suction port with the first base and the second base, respectively. An air inlet is disposed in the first base, and an air outlet is disposed in the second base. This design, utilizing the first base, the partition, and the second base, facilitates the rapid formation of the first cavity and the second cavity within the dust removal assembly, improving assembly efficiency.

[0017] In some embodiments, the dust removal assembly further includes a diversion protrusion disposed on the cavity wall of the second cavity, dividing the second cavity into at least two branch channels, each branch channel connecting the suction port and the discharge component. This design, utilizing the diversion protrusion to divide the second cavity into at least two branch channels, causes the dust entering the second cavity to flow in at least two dispersed streams, reducing the likelihood of inconsistent flow velocities in different areas due to a single large channel within the second cavity, resulting in more uniform and stable dust collection within the second cavity.

[0018] In some embodiments, the end of the diversion protrusion near the suction port includes a diversion end, the dimension of which along the fourth direction is denoted as W. The closer the diversion end is to the suction port, the smaller its dimension W becomes. The fourth direction is the distribution direction of each branch channel. This design, with a diversion end at one end of the diversion protrusion, not only reduces the resistance to dust drawn in from the suction port, but also facilitates smoother and more even distribution of dust to the branch channels on both sides, thus improving the dust removal effect.

[0019] In some embodiments, the dust removal mechanism further includes a dust collector having a collection port and a dust collection chamber communicating with the collection port. The collection port is configured to allow at least a portion of the dust escaping from the dust removal assembly to enter the dust collection chamber. This design, by introducing the dust collector, effectively collects the dust escaping from the dust removal assembly, reducing the probability of dust falling onto the film layer of the solar cell due to escaping from the dust removal assembly, and further improving the dust removal effect.

[0020] In some embodiments, the dust removal component is sleeved within the dust collection body, with both the suction port and the blowing port located at the end of the dust collection body that has the collection port. This design, placing the dust removal component within the dust collection body, ensures that dust escaping from either the blowing port or the suction port can effectively enter the dust collection chamber through the collection port, further improving the dust removal effect.

[0021] In some embodiments, the dust removal assembly includes a dust removal surface, with both an air blowing port and a suction port located on the dust removal surface, which extends beyond the collection port. This design increases the likelihood of escaping dust entering the collection port, further reducing the chance of dust falling onto the film layer of the solar cell and improving the dust removal effect.

[0022] In some embodiments, the surface of the dust collection component is provided with a protrusion, which is disposed on the cavity wall of the dust collection chamber, so that a flow space is formed between the side of the protrusion facing the suction port, the cavity wall of the dust collection chamber, and the dust collection component. This design introduces a flow space, reduces the probability of dead zones in airflow within the dust collection chamber, and makes it easier for dust escaping from the suction port to be collected in the dust collection body, thereby improving the dust collection effect.

[0023] In some embodiments, the side of the boss facing the suction port includes a first guide surface and a second guide surface. Along the direction from the suction port to the position where the discharge component connects on the dust collection assembly, the distance D2 between the first guide surface and the second guide surface gradually increases. This design, by introducing the first and second guide surfaces, allows dust in the flow space to be gradually guided towards both sides of the boss under the guidance of the first and second guide surfaces, reducing the obstruction force of the boss on the dust, making the flow of dust in the dust collection body smoother and more stable, and improving the dust collection effect.

[0024] Secondly, this application provides a solar cell edge cleaning device, including: an edge cleaning mechanism for etching an area on the solar cell to be cleaned; and a dust removal mechanism, as described above, wherein the dust removal surface is arranged facing the area to be cleaned, and the dust removal mechanism is configured to blow air and suck air into the area to be cleaned.

[0025] This design effectively improves dust removal and reduces the impact on solar cell performance.

[0026] In some embodiments, the edge cleaning mechanism and the dust removal mechanism are respectively located on opposite sides of the substrate glass of the solar cell, with the edge cleaning mechanism situated on the side of the substrate glass facing away from the area to be cleaned. The edge cleaning mechanism is constructed as a laser device. This design rationally distributes the edge cleaning mechanism and the dust removal mechanism, ensuring that they do not interfere with each other during operation. Simultaneously, the blown dust will not affect the edge cleaning mechanism, allowing it to operate stably.

[0027] In some embodiments, the edge cleaning mechanism is constructed as a laser device. The single scan length of the edge cleaning mechanism along the travel direction on the area to be cleaned is denoted as L1, and the length of the suction port is denoted as L2, where L2 / L1≥2. This design ensures that the effective range of the suction port can completely cover the scanning range of the edge cleaning mechanism, allowing the dust removal mechanism and the edge cleaning mechanism to travel continuously and improving dust removal efficiency. Attached Figure Description

[0028] Figure 1 This is a structural diagram of the solar cell edge cleaning device described in some embodiments of this application.

[0029] Figure 2 This is a structural diagram of the dust removal mechanism described in some embodiments of this application.

[0030] Figure 3 for Figure 2 The structural sectional view in the image.

[0031] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle circle.

[0032] Figure 5This is a structural diagram of the separator described in some embodiments of this application.

[0033] Figure 6 This is a structural diagram of the first seat body described in some embodiments of this application.

[0034] Figure 7 This is a structural diagram of the second seat as described in some embodiments of this application.

[0035] Figure 8 This is a structural diagram of the dust removal mechanism described in some other embodiments of this application.

[0036] Figure 9 for Figure 8 The structural sectional view in the image.

[0037] Figure 10 This is a structural diagram of the second seat as described in some embodiments of this application.

[0038] Figure 11 This is a structural diagram of the solar cell edge cleaning device described in some other embodiments of this application.

[0039] Figure 12 This is a diagram showing the relationship between the suction port and the scanning length in some embodiments of this application.

[0040] Figure 13 This is a flowchart of a solar cell edge cleaning method described in some embodiments of this application.

[0041] 10. Dust removal mechanism; 11. Dust removal assembly; 111. Air outlet; 112. Suction outlet; 113. Dust removal surface; 114. First opening; 115. Second opening; 12. First cavity; 121. First wall; 122. Flow-blocking part; 12a. Flow-blocking surface; 1a1. First end; 1a2. Second end; 12b. Protruding surface; 12c. Mating surface; 1c1. Third end; 1c2. Fourth end; 12d. Transition surface; 123. Second wall; 124. Flow-draining part; 12e. Flow-draining surface; 125. Air intake channel; 126. Flow-draining channel; 13. Second cavity; 131. Branch channel; 14. Blocking protrusion 141. Protrusion group; 142. Flow gap; 15. Diverter protrusion; 151. Diverter end; 16. First seat; 161. Second seat; 162. Separator; 17. Dust collector; 171. Dust collection chamber; 172. Collection port; 173. Outlet; 174. Boss; 17a. First guide surface; 17b. Second guide surface; 175. Flow space; 18. Air inlet; 181. Discharge component; 182. Regulating valve; X. First direction; Y. Second direction; Z. Third direction; 20. Solar cell; 21. Substrate glass; 22. Area to be cleaned; 23. Film layer; 30. Cleaning mechanism. Detailed Implementation

[0042] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application 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 application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0043] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this application.

[0044] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this application, unless otherwise expressly 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via 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. Similarly, "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.

[0047] It should be noted that if 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. If 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. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0048] In the production of solar cells, after various functional thin films are fabricated on the glass substrate, an edge cleaning operation is required around the glass substrate. For example, a certain area around the glass perimeter is removed using laser etching. Simultaneously, to promptly remove the dust generated during laser etching, a dust removal device is typically installed. Traditional dust removal devices are usually dust collection pipes, which are used to suction out the dust generated during edge cleaning from the area to be cleaned.

[0049] Because dust collection pipes, in addition to removing dust, also create a negative pressure effect on the area to be cleaned, causing the area to vibrate and affecting the cleaning process, traditional dust collection pipes cannot be placed too close to the area to be cleaned. This results in a gap between the dust collection pipe and the area to be cleaned, allowing dust to easily escape from the dust collection pipe and fall onto the thin film, affecting the performance of the solar cell.

[0050] Based on this, and addressing the problem of dust easily escaping and affecting solar cell performance in traditional dust removal processes, this application proposes a dust removal mechanism. During edge cleaning of solar cells, both the air inlet and suction outlet of the dust removal component are directed towards the area to be cleaned. Then, air is circulated through the inlet and suction is applied through the outlet. At this time, gas is blown from the air inlet towards the area to be cleaned, stirring up the dust generated during the cleaning process. Simultaneously, the suction from the outlet creates a negative pressure at the suction outlet, promptly removing the blown-up dust. Because air inlets and inlets are introduced during dust removal, air can be blown into the area to be cleaned while suction is applied. This not only increases the probability of dust removal but also relatively weakens the negative pressure effect of the suction outlet on the area to be cleaned, allowing the suction outlet to be closer to the area, thereby reducing the probability of dust escape. This design effectively improves dust removal efficiency and reduces the impact on solar cell performance.

[0051] According to some embodiments of this application, please refer to Figures 1 to 3 This application provides a dust removal mechanism 10, which includes a dust removal assembly 11, an air inlet 18, and an exhaust outlet 181. The dust removal assembly 11 is provided with an air blowing port 111 and a suction port 112, both configured to face the edge region 22 to be cleaned on the solar cell 20. The air inlet 18 and the exhaust outlet 181 are both located on the dust removal assembly 11, with the air inlet 18 communicating with the air blowing port 111 and the exhaust outlet 181 communicating with the suction port 112.

[0052] The air blowing port 111 and the suction port 112 refer to the perforated structures on the dust removal component 11 that can communicate with the outside. During the edge cleaning operation, the air blowing port 111 and the suction port 112 can be simultaneously directed toward the edge area 22 of the solar cell 20 to be cleaned, so that the airflow output from the air blowing port 111 can blow up the dust in the edge area 22 to be cleaned, and the suction port 112 can suck up the blown dust. Of course, the suction port 112 can also suck up the dust in the edge area 22 that has not been blown.

[0053] The air blowing port 111 and the suction port 112 can be located on the same part of the dust removal assembly 11, or they can be located on different parts of the dust removal assembly 11. For example, the dust removal assembly 11 includes two separate structures, with the air blowing port 111 and the suction port 112 respectively located on two different structures. In some specific examples, the dust removal assembly 11 includes a dust removal surface 113, with the air blowing port 111 and the suction port 112 located on the dust removal surface 113. In this way, during the edge cleaning process, the dust removal surface 113 can face the area 22 to be cleaned, so that both the air blowing port 111 and the suction port 112 can act on the area 22 to be cleaned.

[0054] Meanwhile, the relative positional relationship between the air blowing port 111 and the suction port 112 can be designed in various ways. For example, the air blowing port 111 and the suction port 112 can be arranged side by side and spaced apart along a linear direction; or, the suction port 112 can be arranged around the outer periphery of the air blowing port 111, that is, the suction port 112 has a ring-shaped structure, so that the dust around the air blowing port 111 can be completely sucked up during suction, improving the dust removal effect; or, the air blowing port 111 can also be arranged around the outer periphery of the suction port 112, etc. In addition, the number of air blowing ports 111 and suction ports 112 can be one or more. When the number of air blowing ports 111 and suction ports 112 is multiple, the multiple suction ports 112 can be distributed circumferentially around the air blowing port 111 at intervals; of course, the arrangement of air blowing ports 111 and suction ports 112 can also be other, such as: matrix distribution, irregular close arrangement, etc.

[0055] In addition, during the edge cleaning operation, gas can be introduced into the air inlet 18 so that the gas reaches the air outlet 111 and is blown toward the edge to be cleaned area 22; at the same time, the exhaust 181 can be vacuumed so that a negative pressure is formed at the suction port 112, which removes the dust that has been blown away and the dust that has not been blown away, reducing the chance of dust falling onto the film layer 23 of the solar cell 20.

[0056] The air inlet 18 can be designed as a hollow structure, with one end directly or indirectly connected to the air outlet 111, and the other end connected to an external air source, such as a blower or a high-pressure air tank. To facilitate adjustment of the airflow, a regulating valve 182, such as a ball valve or gate valve, can be installed on the air inlet 18. Furthermore, the discharge component 181 can also be a hollow structure, with one end directly or indirectly connected to the suction outlet 112, and the other end connected to an external vacuum device.

[0057] During dust removal, the air outlet 111 not only blows up the dust in the area 22 to be cleaned, but also reduces the negative pressure effect of the suction port 112 on the area 22 to be cleaned, reducing the probability of the area 22 to be cleaned shaking due to adsorption. Thus, under the same suction force, the suction port 112 in this embodiment can be relatively closer to the area 22 to be cleaned, reducing the distance between the suction port 112 and the area 22 to be cleaned, thereby reducing the probability of dust escaping from between the suction port 112 and the area 22 to be cleaned.

[0058] It should be noted that, compared to traditional dust removal devices, the dust removal mechanism 10 of this embodiment introduces an air blowing port 111 and an air inlet 18, which can weaken the negative pressure effect of the suction port 112 on the edge-cleaning area 22. Thus, without causing the edge-cleaning area 22 to shake due to adsorption, and under the premise of equal suction force, the suction port 112 of this embodiment can be allowed to be closer to the edge-cleaning area 22. As for the specific value of the distance between the suction port 112 and the edge-cleaning area 22 during the edge-cleaning operation, it can be determined according to the relationship between the actual suction pressure and the blowing pressure, as well as the structural strength of the edge-cleaning area 22 itself. For example, the distance between the suction port 112 and the edge-cleaning area 22 can be, but is not limited to, 1mm to 20mm.

[0059] Meanwhile, the relationship between the gas flow rate at the blowing port 111 and the gas flow rate at the suction port 112 can be set in various ways. For example, the gas flow rate at the blowing port 111 can be less than or equal to the gas flow rate at the suction port 112, or it can be greater than the gas flow rate at the suction port 112. When the gas flow rate at the blowing port 111 is less than the gas flow rate at the suction port 112, in addition to creating a negative pressure at the suction port 112, a negative pressure can also be created at a certain distance from the suction port 112, making it easier for the blown dust to be sucked into the suction port 112.

[0060] Additionally, it should be noted that the area to be cleaned 22 refers to the structure located at the periphery of the substrate glass 21 after the film layer 23 is formed on the substrate glass 21. This structure needs to be etched away before encapsulation to form a ring-shaped isolation channel, thereby meeting the requirements of subsequent insulation and sealing encapsulation. The film layer 23 refers to multiple functional stacked structures formed on the substrate glass 21, such as a transparent conductive layer, a hole transport layer, a light-absorbing layer, an electron transport layer, and a metal electrode layer.

[0061] This design effectively improves dust removal and reduces the impact on the performance of solar cells 20.

[0062] Optionally, according to some embodiments of this application, please refer to Figure 3 The dust removal assembly 11 has a first chamber 12 and a second chamber 13 separated from each other. The air inlet 18 is connected to the air blowing port 111 through the first chamber 12, and the discharge part 181 is connected to the suction port 112 through the second chamber 13.

[0063] It can be seen that when gas is introduced into the inlet 18, it can enter the first chamber 12 and then flow from the first chamber 12 to the air outlet 111. The introduction of the first chamber 12 between the inlet 18 and the air outlet 111 allows the gas flowing out of the inlet 18 to enter the air outlet 111 more effectively under the constraint or guidance of the first chamber 12. Similarly, during suction, dust can enter the second chamber 13 from the suction port 112 and then flow from the second chamber 13 to the discharge member 181, ensuring a stable flow of dust between the suction port 112 and the discharge member 181.

[0064] In some specific examples, the dust removal assembly 11 is also provided with a first opening 114 and a second opening 115. The first chamber 12 is connected to the air intake 18 through the first opening 114, and the second chamber 13 is connected to the exhaust 181 through the second opening 115.

[0065] This design introduces the first chamber 12 and the second chamber 13 respectively, so that the gas flows stably between the air inlet 18 and the air outlet 111, and the dust flows stably between the suction port 112 and the discharge port 181, thereby ensuring that the dust removal operation is carried out stably.

[0066] Optionally, according to some embodiments of this application, please refer to Figure 3 The first cavity 12 includes an air intake channel 125 and a drainage channel 126 connected sequentially along the first direction X. The drainage channel 126 is connected to the air blowing port 111, and the air intake channel 125 is connected to the air intake component 18. The closer the end of the air intake channel 125 connected to the drainage channel 126 is to the drainage channel 126, the smaller the flow area.

[0067] During the blowing process, gas enters the intake channel 125 through the intake component 18, then flows into the drainage channel 126; finally, it flows to the blowing port 111 through the drainage channel 126. Because one end of the intake channel 125 has a smaller flow area closer to the drainage channel 126, the gas is gradually contracted and constrained before entering the drainage channel 126. Simultaneously, the drainage channel 126 facilitates a more stable gas output to the blowing port 111, reducing the likelihood of turbulence caused by direct impact on the blowing port 111, resulting in smoother blowing and more orderly dust removal from the cleaning area 22. Furthermore, a smaller flow area leads to a relatively higher gas velocity, which in turn increases the blowing force at the blowing port 111.

[0068] To achieve an airflow contraction effect at the end of the intake channel 125 near the drainage channel 126, at least one cavity wall of the intake channel 125 near the drainage channel 126 can be designed as an inclined wall or an arched wall. In addition to the section of the intake channel 125 near the drainage channel 126 being designed as a flow-surface contraction structure, other parts of the intake channel 125 can also be designed as flow-surface contraction structures. For example, the flow surface gradually decreases along the first direction X; or the flow surface remains constant along the first direction X and then decreases; or the flow surface remains constant along the first direction X, then decreases, and then remains constant, etc.

[0069] In some specific examples, the intake channel 125 includes a first flow channel section, a second flow channel section, a third flow channel section, and a fourth flow channel section connected sequentially along a first direction X. The first flow channel section is connected to the intake component 18, and the fourth flow channel section is connected to the guide channel 126. The flow area of ​​the first flow channel section remains constant along the first direction X, the flow area of ​​the second flow channel section gradually decreases along the first direction X, the flow area of ​​the third flow channel section remains constant along the first direction X, and the flow area of ​​the fourth flow channel section decreases as it approaches the guide channel 126. Therefore, after the gas enters the intake channel 125 from the intake component 18, it can flow in the first flow channel section where the flow surface remains constant. After entering the second flow channel section, the flow area gradually contracts, and the gas is also compressed for the first time. The compressed gas enters the third flow channel section, where, guided by the unchanged flow surface, the gas velocity remains stable. Then, after entering the fourth flow channel section, the gas is compressed a second time, making the gas more concentrated.

[0070] This design, by introducing the air inlet channel 125 and the drainage channel 126, allows the gas to gradually contract and be constrained before being smoothly output to the air outlet 111 under the action of the drainage channel 126. This reduces the likelihood of turbulence caused by direct impact on the air outlet 111, thus making the dust in the area to be cleaned 22 more orderly blown up. At the same time, the smaller the flow area, the higher the gas velocity, which can relatively increase the blowing force at the air outlet 111 and improve the dust removal effect.

[0071] Optionally, according to some embodiments of this application, please refer to Figure 4 The drainage channel 126 is connected to the air blowing port 111 and the air intake channel 125 at opposite ends along the second direction Y, respectively. The second direction Y is configured to be inclined relative to the first direction X. The end of the drainage channel 126 connected to the air blowing port 111 is closer to the suction port 112 than the end of the drainage channel 126 connected to the air intake channel 125.

[0072] Therefore, the gas flow direction in the drainage channel 126 intersects with the first direction X. When gas flows from the inlet channel 125 into the drainage channel 126, its flow direction changes, providing a certain degree of resistance and reducing the probability of the contracted gas directly impacting the blowing port 111, thus making the blowing more stable. Specifically, in some examples, the first direction X is vertical, and the second direction Y is inclined relative to the horizontal direction.

[0073] Since the end of the drainage channel 126 connected to the air blowing port 111 is closer to the suction port 112 than the end of the drainage channel 126 connected to the air intake channel 125, the gas blown out at an angle can blow most of the dust in the area to be cleaned 22 toward the side of the suction port 112, making it easier for the dust to be drawn away by the suction port 112.

[0074] When both the air blowing port 111 and the suction port 112 are located above the area 22 to be cleaned, their positions can be varied. For example, in a solar cell 20 comprising a film layer 23 and an area 22 to be cleaned surrounding the film layer 23, both the air blowing port 111 and the suction port 112 are located above the area 22, with the air blowing port 111 positioned between the suction port 112 and the film layer 23. This arrangement directs dust away from the film layer 23 towards the suction port 112, significantly reducing the likelihood of dust falling onto the film layer 23. Of course, in other examples, the suction port 112 can also be located between the air blowing port 111 and the film layer 23.

[0075] Since the second direction Y of the flow channel 126 is inclined relative to the first direction X, in order to facilitate a better connection between the intake channel 125 and the flow channel 126, in some examples, the intake channel 125 may include a first flow channel section, a second flow channel section, a third flow channel section and a fourth flow channel section connected sequentially in the first direction X. The first flow channel section is connected to the intake component 18, and the fourth flow channel section is connected to the flow channel 126. The flow area of ​​the fourth flow channel section is smaller the closer it is to the flow channel 126, and the extension direction of the fourth flow channel section can also be inclined relative to the first direction X.

[0076] In addition, the flow area of ​​the drainage channel 126 can remain constant along the second direction Y, or it can be designed to gradually change. For example, the flow area of ​​the drainage channel 126 along the second direction Y and closer to the suction port 112 is smaller.

[0077] With this design, the gas blown out at an angle can blow most of the dust in the area 22 to be cleaned toward one side of the suction port 112, making it easier for the dust to be drawn away by the suction port 112 and improving the dust removal effect.

[0078] Optionally, according to some embodiments of this application, please refer to Figure 4The angle between the first direction X and the second direction Y is denoted as θ, where 10°≤θ≤60°.

[0079] The angle between the first direction X and the second direction Y can be between 10° and 60°, for example, but not limited to 10°, 20°, 30°, 40°, 50°, 60°, etc.

[0080] This design controls the angle between the first direction X and the second direction Y to be between 10° and 60°, allowing the gas to be blown out at a reasonable angle, making it easier for dust to be drawn away by the suction port 112 and improving the dust removal effect.

[0081] Optionally, according to some embodiments of this application, please refer to Figures 4 to 6 The cavity wall of the first cavity 12 includes a first wall 121 and a second wall 123 opposite each other along the third direction Z, a flow-blocking part 122 protruding from the first wall 121, and a flow-draining part 124 protruding from the second wall 123. The first wall 121 is closer to the second cavity 13 than the second wall 123. The flow-blocking part 122 is located at the upstream end of the flow-draining part 124 along the first direction X, and the projections of the two along the first direction X have at least partial overlap. An air intake channel 125 is formed between the portion of the first wall 121, the flow-blocking part 122, the second wall 123, and the portion of the flow-draining part 124 away from the air outlet 111. A flow-draining channel 126 is formed between the flow-blocking part 122 and the flow-draining part 124. The third direction Z intersects with the first direction X.

[0082] The flow-blocking part 122 refers to the structure protruding from the upper edge of the first wall 121 toward the second wall 123, and the flow-guiding part 124 refers to the structure protruding from the upper edge of the second wall 123 toward the first wall 121. Since the flow-blocking part 122 is located upstream of the flow-guiding part 124, the gas flowing out of the intake member 18 can preferentially flow through the flow-blocking part 122 and then through the flow-guiding part 124. The upstream end of the flow-guiding part 124 can be understood as the position where gas has just flowed into or is about to flow into the flow-guiding part 124 in the gas flow direction within the intake chamber, and the position where gas has just flowed out or has already flowed out of the flow-guiding part 124 can be considered the downstream end of the flow-guiding part 124. When the first direction X is vertical, the flow-blocking part 122 can be located above the flow-guiding part 124.

[0083] Since the projections of the flow-blocking part 122 and the flow-guiding part 124 in the first direction X have at least partial overlap, and a flow-guiding channel 126 is formed between them, the flow-blocking part 122 can block the flow-guiding channel 126 in the first direction X, so that some of the gas in the air intake channel 125 will be blocked by the flow-blocking part 122 before entering the flow-guiding channel 126, reducing the probability of gas directly impacting the flow-guiding channel 126 and causing turbulence, thereby allowing the gas to flow out of the air outlet 111 smoothly.

[0084] Meanwhile, the flow area between the obstruction section 122 and the portion of the guide section 124 away from the air outlet 111 is smaller the closer it is to the guide channel 126. This causes the gas before entering the guide channel 126 to be gradually contracted, enter the guide channel 126 stably and quickly, and then be blown out of the air outlet 111. Specifically, in some examples, the gap between the obstruction section 122 and the portion of the guide section 124 away from the air outlet 111 is smaller the closer it is to the guide channel 126.

[0085] Additionally, it should be noted that a portion of the air intake channel 125 is also formed on the portion of the drainage section 124 away from the suction port 112, so that the end of the air intake channel 125 near the drainage channel 126 and the drainage channel 126 are both located on the drainage section 124. This allows the gas in the air intake channel 125 to flow more stably into the drainage channel 126, improving the stability of the blowing.

[0086] With this design, the flow-blocking part 122 can block the flow-guiding channel 126 in the first direction X, so that some of the gas in the air intake channel 125 will be blocked by the flow-blocking part 122 before entering the flow-guiding channel 126, reducing the probability of gas directly impacting the flow-guiding channel 126 and causing turbulence, thereby allowing the gas to flow out of the air outlet 111 smoothly.

[0087] Optionally, according to some embodiments of this application, please refer to Figure 4 and Figure 5 The flow-blocking part 122 includes a flow-blocking surface 12a disposed along the first direction X away from the flow-draining part 124. The flow-blocking surface 12a includes a second end 1a2 and a first end 1a1 distributed sequentially along the first direction X. The flow-blocking surface 12a is inclined relative to the first direction X, and the first end 1a1 is more biased toward the second wall 123 than the second end 1a2.

[0088] It can be seen that when gas enters the intake channel 125 and flows along the first direction X, the flow-blocking surface 12a can block part of the gas flow, change the flow trajectory, and make it flow from the second end 1a2 of the flow-blocking surface 12a to the first end 1a1 of the flow-blocking surface 12a, thereby causing the gas to concentrate towards the second wall 123, and thus causing the gas in the intake channel 125 to be contracted.

[0089] The second end 1a2 and the first end 1a1 are sequentially distributed along the first direction X, indicating that the first end 1a1 is located downstream of the second end 1a2 in the first direction X, meaning that the first end 1a1 is closer to the flow channel 126 than the second end 1a2 in the first direction X. In some examples, when the dust removal mechanism 10 is operating normally, the first end 1a1 is located below the second end 1a2. Furthermore, the angle between the flow-blocking surface 12a and the first direction X can be designed in various ways, for example, it can be, but is not limited to, between 10° and 60°. Additionally, the flow-blocking surface 12a and the second wall 123 can form part of the air intake channel 125.

[0090] This design introduces a flow-blocking surface 12a, which allows some of the gas in the air intake channel 125 to contract more smoothly, enabling the gas to enter the flow channel 126 stably and improving the stability of the blowing.

[0091] Optionally, according to some embodiments of this application, please refer to Figure 4 and Figure 5 The flow-blocking part 122 includes a mating surface 12c disposed along the first direction X toward the flow-draining part 124. The mating surface 12c includes a third end 1c1 and a fourth end 1c2 distributed sequentially along the first direction X. The mating surface 12c is inclined relative to the first direction X, and the third end 1c1 is more biased toward the second wall 123 than the fourth end 1c2.

[0092] Therefore, when gas flows from the inlet channel 125 into the drainage channel 126, at least a portion of the gas can flow from the third end 1c1 of the mating surface 12c to the fourth end 1c2 of the mating surface 12c, causing the gas from the blowing port 111 to be blown out at an angle, thereby causing at least a portion of the dust in the area 22 to be cleaned to be blown to one side, facilitating its concentrated removal. The third end 1c1 and the fourth end 1c2 are sequentially distributed along the first direction X, indicating that the fourth end 1c2 is located downstream of the third end 1c1 in the first direction X, meaning that the third end 1c1 is closer to the inlet channel 125 than the fourth end 1c2 in the first direction X. In some examples, when the dust removal mechanism 10 is operating normally, the fourth end 1c2 is located below the third end 1c1.

[0093] In some examples, please refer to Figure 4 and Figure 5 The flow-blocking section 122 may further include a flow-blocking surface 12a, which is disposed opposite to the mating surface 12c and both are inclined relative to the first direction X. The distance between the flow-blocking surface 12a and the mating surface 12c gradually decreases from the first wall 121 to the second wall 123. This design allows the gas in the intake channel 125 to be stably guided into the flow-guiding channel 126.

[0094] Meanwhile, the flow obstruction section 122 may also include a raised surface 12b, which is located between the flow obstruction surface 12a and the mating surface 12c. The raised surface 12b and the second wall 123 form part of the air intake channel 125 in the third direction Z. The distance between the raised surface 12b and the second wall 123 may remain constant or gradually decrease along the first direction X.

[0095] Furthermore, the flow obstruction section 122 also includes a transition surface 12d, which connects the protruding surface 12b and the mating surface 12c. The flow guide section 124 may include a flow guide surface 12e. An air intake channel 125 can be formed between the transition surface 12d and the flow guide surface 12e, near a portion of the flow guide channel 126. A flow guide channel 126 can be formed between the mating surface 12c and the flow guide surface 12e. The flow guide surface 12e can be designed as a curved surface or an inclined surface. In some specific examples, the distance between the transition surface 12d and the flow guide surface 12e is smaller as it gets closer to the flow guide channel 126. Both the flow guide surface 12e and the mating surface 12c can be inclined surfaces, and they are arranged parallel to each other.

[0096] This design causes the gas from the air outlet 111 to be blown out at an angle, which causes at least part of the dust in the area 22 to be cleaned to be blown to one side, making it easier to concentrate and remove the dust, thus improving the dust removal effect.

[0097] Optionally, according to some embodiments of this application, please refer to Figure 4 The distance between the mating surface 12c and the drainage part 124 is denoted as D1, and the distance between the third end 1c1 of the mating surface 12c and the fourth end 1c2 of the mating surface 12c is denoted as L0, where L0 / D1≥5.

[0098] The larger the ratio of distance L0 to spacing D1, the more the drainage channel 126 presents or approximates a slit structure, allowing the gas to be blown out of the air outlet 111 more smoothly. The ratio of distance L0 to spacing D1 can be greater than or equal to 5, for example, it can be, but is not limited to, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 40, 50, etc.

[0099] In addition, the air inlet 111 can also be designed as a relatively long and narrow mouth-shaped structure. For example, the ratio of the length of the air inlet 111 to the width of the air inlet 111 can be greater than or equal to 5.

[0100] This design ensures that the ratio of distance L0 to spacing D1 is greater than or equal to 5, making the drainage channel 126 appear as or approximately as a slit structure, allowing the gas to be blown out of the air outlet 111 more smoothly, thereby further improving the dust blowing effect.

[0101] Optionally, according to some embodiments of this application, please refer to Figure 3 and Figure 6 The dust removal assembly 11 also includes a blocking protrusion 14, which protrudes from the cavity wall of the air intake channel 125.

[0102] The obstruction protrusion 14 refers to a raised structure on the cavity wall of the air intake channel 125, which can slow down the flow of gas in the air intake channel 125 and reduce the probability of turbulence in the gas entering the air intake channel 125. At the same time, the obstruction protrusion 14 is provided in the air intake channel 125 so that the incoming gas is evenly dispersed under the action of the obstruction protrusion 14, which makes it easier for the gas to fill the air blowing port 111 better.

[0103] The blocking protrusion 14 can be distributed in various positions within the air intake channel 125. For example, in some examples, the cavity wall of the air intake channel 125 includes a first wall 121 and a second wall 123 that are parallel and spaced apart, and the blocking protrusion 14 is disposed on the first wall 121 and / or the second wall 123.

[0104] Meanwhile, the blocking protrusion 14 can be installed on the cavity wall of the air intake channel 125 in various ways, such as, but not limited to, welding, snap-fit, bolt connection, etc. Of course, it can also be integrally molded, such as, but not limited to, injection molding, die casting, etc.

[0105] This design introduces a blocking protrusion 14 to slow down the flow of gas in the intake channel 125 and reduce the probability of turbulence in the gas entering the intake channel 125. At the same time, it also allows the incoming gas to be evenly dispersed under the action of the blocking protrusion 14, making it easier for the gas to fill the blowing port 111 better.

[0106] Optionally, according to some embodiments of this application, please refer to Figure 6 The blocking protrusions 14 include a plurality of protrusions and are spaced apart along the first direction X to form at least two protrusion groups 141. The blocking protrusions 14 in each protrusion group 141 are arranged side by side and spaced apart to form a flow gap 142 between two adjacent blocking protrusions 14. In two adjacent protrusion groups 141, the flow gap 142 in one group is staggered from the flow gap 142 in the other group in the first direction X.

[0107] The protrusion group 141 refers to a structure formed by several blocking protrusions 14 arranged side by side and spaced apart in a linear direction. Since the flow gap 142 in one of the two adjacent protrusion groups 141 is staggered from the flow gap 142 in the other in the first direction X, after the gas enters the intake channel 125, it can flow through the flow gap 142 in one of the protrusion groups 141. When the gas reaches the other protrusion group 141, the gas can be blocked by the blocking protrusion 14 in the protrusion group 141, so that the gas changes its flow direction and flows through the flow gaps 142 on both sides of the blocking protrusion 14.

[0108] The number of protrusion groups 141 can be designed in various ways, such as, but not limited to, two, three, four, five or more. Furthermore, the number of blocking protrusions 14 in each protrusion group 141 can be the same or different.

[0109] This design staggers the flow gaps 142 in two adjacent protrusion groups 141, so that the flow of gas in each protrusion group 141 is slowed down in turn, further reducing the probability of turbulence; at the same time, it also drives the gas to be more evenly dispersed, making the blowing more stable.

[0110] Optionally, according to some embodiments of this application, please refer to Figure 3 The dust removal assembly 11 includes a first seat 16, a second seat 161, and a partition 162 disposed between the first seat 16 and the second seat 161. The partition 162 forms a first cavity 12 and a second cavity 13 with the first seat 16 and the second seat 161, respectively. One end of the partition 162 forms an air blowing port 111 and a suction port 112 with the first seat 16 and the second seat 161, respectively. An air inlet 18 is disposed in the first seat 16, and an air outlet 181 is disposed in the second seat 161.

[0111] Therefore, during the edge cleaning process, the gas in the air inlet 18 can enter between the first seat 16 and the partition 162, and be blown out from the air outlet 111 between one end of the partition 162 and the first seat 16, so that the gas blows up the dust in the area 22 to be cleaned; then, the blown dust is sucked into the space between the partition 162 and the second seat 161 under the negative pressure in the suction port 112, so that the dust is discharged from the discharge outlet 181.

[0112] To form a first cavity 12 between the first seat 16 and the partition 162, a groove can be provided on the surface of the first seat 16; a groove can also be provided on the surface of the partition 162; of course, grooves can also be provided on the surfaces of both the first seat 16 and the partition 162. When the first seat 16 and the partition 162 are stacked, the two grooves can cooperate to form the first cavity 12.

[0113] Similarly, in order to form a second cavity 13 between the second seat 161 and the partition 162, a groove can be provided on the surface of the second seat 161; a groove can also be provided on the surface of the partition 162; of course, grooves can also be provided on the surfaces of both the second seat 161 and the partition 162. When the second seat 161 and the partition 162 are stacked, the two grooves can cooperate to form the second cavity 13.

[0114] The connection method of the separator 162 between the first seat 16 and the second seat 161 can be various, such as, but not limited to, bolt connection, snap-fit, welding, riveting, etc.

[0115] Furthermore, when the cavity wall of the first cavity 12 includes a flow-blocking portion 122, a flow-draining portion 124, a first wall 121, and a second wall 123, the first wall 121 can be the surface of the partition 162 facing the first cavity 12, and the flow-blocking portion 122 protrudes from the surface of the partition 162 facing the first cavity 12. Simultaneously, the second wall 123 is the surface of the first seat 16 facing the first cavity 12, and the flow-draining portion 124 protrudes from the surface of the first seat 16 facing the first cavity 12.

[0116] This design, utilizing the first seat 16, the separator 162, and the second seat 161, facilitates the rapid formation of the first cavity 12 and the second cavity 13 within the dust removal assembly 11, thereby improving assembly efficiency.

[0117] Optionally, according to some embodiments of this application, please refer to Figure 3 and Figure 7 The dust removal assembly 11 also includes a diversion protrusion 15, which is disposed on the cavity wall of the second cavity 13 and divides the second cavity 13 into at least two branch channels 131, each of which is connected between the suction port 112 and the discharge member 181.

[0118] The diversion protrusion 15 refers to the protruding structure on the cavity wall of the second cavity 13, which can divide the second cavity 13 into at least two branch channels 131. When dust is sucked in from the suction port 112, it can be divided into at least two streams of fluid to flow separately, so that the dust flow velocity in different areas of the second cavity 13 remains relatively consistent, improving the stability of dust removal.

[0119] The number of diversion protrusions 15 can be one or more. When there are multiple diversion protrusions 15, they can be arranged side by side and spaced apart. The distribution position of the diversion protrusions 15 within the second cavity 13 can also vary. For example, when the dust removal assembly 11 includes a first seat 16, a second seat 161, and a separator 162 separated between the first seat 16 and the second seat 161, a first cavity 12 can be formed between the first seat 16 and the separator 162, and a second cavity 13 can be formed between the second seat 161 and the separator 162. In this case, the diversion protrusion 15 can be located on the surface of the second seat 161 facing the second cavity 13, or it can be located on the surface of the separator 162 facing the second cavity 13; of course, one end of the diversion protrusion 15 can be fixed to the second seat 161, and the other end can be fixed to the separator 162.

[0120] This design utilizes the diversion protrusion 15 to divide the second chamber 13 into at least two branch channels 131, causing the dust entering the second chamber 13 to flow in at least two streams, reducing the probability of inconsistent flow rates in different areas due to the second chamber 13 being a single large channel, and making the dust collection in the second chamber 13 more uniform and stable.

[0121] Optionally, according to some embodiments of this application, please refer to Figure 7 The end of the diversion protrusion 15 near the suction port 112 includes a diversion end 151. The dimension of the diversion end 151 along the fourth direction is denoted as W. The closer the diversion end 151 is to the suction port 112, the smaller its dimension W is. The fourth direction is the distribution direction of each branch channel 131.

[0122] Therefore, the diversion end 151 of the diversion protrusion 15 can be or approximately trapezoidal or triangular in design, which can reduce the resistance of the diversion end 151 to the dust sucked in from the suction port 112, and facilitate the dust to flow more smoothly into the branch channels 131 on both sides with the airflow.

[0123] This design, with a diversion end 151 at one end of the diversion protrusion 15, not only reduces the resistance to dust drawn in from the suction port 112, but also facilitates smoother and more even distribution of dust to the branch channels 131 on both sides, which is beneficial to improving the dust removal effect.

[0124] Optionally, according to some embodiments of this application, please refer to Figure 8 and Figure 9 The dust removal mechanism 10 also includes a dust collection body 17, which has a collection port 172 and a dust collection chamber 171 communicating with the collection port 172. The collection port 172 is configured to allow at least a portion of the dust escaping from the dust removal assembly 11 to enter the dust collection chamber 171.

[0125] The dust collector 17 refers to a structure with a certain internal space. If a small portion of the dust blown up is not sucked into the suction port 112, the dust can still enter the dust collection chamber 171 through the collection port 172, reducing the probability that the dust will fall onto the film layer 23 in the solar cell 20 due to escaping from the dust removal component 11.

[0126] Dust escaping from the dust collection component 11 can enter the collection port 172 with the airflow blown out of the air outlet 111, or a negative pressure can be formed at the collection port 172 to actively suck up the dust escaping from the dust collection component 11. For example, the dust collector 17 also has an outlet 173 that communicates with the dust collection chamber 171. The outlet 173 can be connected to a vacuum device to create a negative pressure at the collection port 172.

[0127] Meanwhile, the relative positions between the dust collector 17 and the dust removal assembly 11 can be designed in various ways. For example, the dust collector 17 is located outside the dust removal assembly 11. In this case, the collection port 172 can be arranged in parallel with the air blowing port 111 and the suction port 112 in a linear direction, or the collection port 172 can surround the outer periphery of the air blowing port 111 and the suction port 112. Alternatively, the dust collector 17 can be fitted outside the dust removal assembly 11, so that the dust removal assembly 11 is at least partially located in the dust collection chamber 171.

[0128] This design, with the introduction of the dust collector 17, can effectively collect the dust that escapes from the dust removal component 11, reducing the probability of dust falling onto the film layer 23 in the solar cell 20 due to escaping from the dust removal component 11, and further improving the dust removal effect.

[0129] Optionally, according to some embodiments of this application, please refer to Figure 9 The dust removal component 11 is fitted inside the dust collection body 17, and the suction port 112 and the air blowing port 111 are both located at the end of the dust collection body 17 with the collection port 172.

[0130] Therefore, at least a portion of the dust removal assembly 11 is located in the dust collection chamber 171. Furthermore, the air blowing port 111 and the suction port 112 of the dust removal assembly 11 are both located on the same side of the dust removal mechanism 10 as the collection port 172. This ensures that dust escaping from either the air blowing port 111 or the suction port 112 can effectively enter the dust collection chamber 171 through the collection port 172.

[0131] Meanwhile, when the dust removal component 11 is located inside the dust collection body 17, a certain gap can be maintained between the cavity wall of the dust collection chamber 171 and the dust removal component 11 so that the dust entering from the collection port 172 can be collected. The dust collection chamber 171 can maintain a gap with one side of the dust removal component 11, or it can maintain a gap with all circumferential sides of the dust removal component 11.

[0132] In addition, the end of the dust removal assembly 11 with the air blowing port 111 and the suction port 112 can extend out of the collection port 172 or be located inside the collection chamber; of course, it can also be flush with the collection port 172.

[0133] With this design, the dust removal component 11 is placed inside the dust collection body 17, so that dust that escapes from either the air blowing port 111 or the suction port 112 can effectively enter the dust collection chamber 171 through the collection port 172, thereby further improving the dust removal effect.

[0134] Optionally, according to some embodiments of this application, please refer to Figure 9 The dust removal component 11 includes a dust removal surface 113, an air blowing port 111 and a suction port 112, both of which are located on the dust removal surface 113, and the dust removal surface 113 extends out of the collection port 172.

[0135] The dust removal surface 113 refers to the surface of the dust removal assembly 11 that has an air blowing port 111 and a suction port 112, which can be a plane or a curved surface. In some examples, the dust removal assembly 11 includes a first base 16, a second base 161, and a separator 162 disposed between the first base 16 and the second base 161. One end of the separator 162 forms an air blowing port 111 and a suction port 112 with the first base 16 and the second base 161, respectively. The dust removal surface 113 is defined by the end face of the separator 162, the end face of the first base 16, and the end face of the second base 161.

[0136] Since the dust-collecting surface 113 extends beyond the collection port 172, there is a certain height difference between the dust-collecting surface 113 and the end face of the dust-collecting body 17. This allows the collection port 172 to be further away from the area to be cleaned 22 relative to the air blowing port 111 and the suction port 112, increasing the probability of escaped dust entering the collection port 172. At the same time, the fact that the dust-collecting surface 113 extends beyond the collection port 172 also indicates that the air blowing port 111 and the suction port 112 are both located outside the collection port 172, which reduces the obstruction of the air blowing port 111 and the suction port 112 by the dust-collecting body 17, allowing the air blowing port 111 and the suction port 112 to accurately act on the area to be cleaned 22, improving the accuracy of blowing and suction.

[0137] The size of the dust removal gap can be set in various ways, such as, but not limited to, 10mm to 20mm.

[0138] This design increases the probability of escaping dust entering the collection port 172, further reducing the probability of dust falling onto the film layer 23 of the solar cell 20, thus improving the dust removal effect.

[0139] Optionally, according to some embodiments of this application, please refer to Figure 9 and Figure 10 The surface of the dust removal component 11 is provided with a boss 174, which is located on the cavity wall of the dust collection chamber 171, so that a flow space 175 is formed between the side of the boss 174 facing the suction port 112, the cavity wall of the dust collection chamber 171 and the dust removal component 11.

[0140] It is known that when the dust removal component 11 is installed in the dust collection body 17, it will be in contact with at least one cavity wall of the dust collection chamber 171, which will prevent airflow between the cavity wall and the dust removal component 11 or cause poor airflow, thereby creating a dead zone for airflow in the dust collection chamber 171 and affecting the dust collection effect of the dust collection chamber 171.

[0141] Therefore, in this embodiment, a boss 174 is provided between the wall of the dust collection chamber 171 and the dust removal assembly 11. A flow space 175 is formed between the side of the boss 174 facing the suction port 112, the wall of the dust collection chamber 171, and the dust removal assembly 11, providing flow space for dust at the connection between the dust removal assembly 11 and the dust collection chamber 171, thus reducing dust accumulation. In this way, during the dust removal process, some of the dust escaping outside the suction port 112 can flow through the flow space 175 and enter the dust collection body 17 for collection.

[0142] This design introduces a flow space 175, reducing the likelihood of dead zones in the airflow within the dust collection chamber 171. This makes it easier for dust escaping from the suction port 112 to be collected within the dust collection body 17, thus improving the dust collection effect.

[0143] Optionally, according to some embodiments of this application, please refer to Figure 10 The side of the boss 174 facing the suction port 112 includes a first guide surface 17a and a second guide surface 17b. Along the direction from the suction port 112 to the position where the discharge member 181 is connected on the dust removal assembly 11, the distance D2 between the first guide surface 17a and the second guide surface 17b gradually increases.

[0144] Therefore, the first guide surface 17a and the second guide surface 17b form an approximately V-shape. During the dust removal process, some dust enters the flow space 175 and flows with the airflow towards the protrusion 174. When the dust reaches the first guide surface 17a and the second guide surface 17b, the distance between them gradually increases with the direction of airflow. As a result, the dust is gradually guided towards both sides of the protrusion 174 by the first guide surface 17a and the second guide surface 17b, reducing the obstruction force of the protrusion 174 on the dust and making the flow of dust in the dust collector 17 smoother and more stable.

[0145] This design introduces a first guide surface 17a and a second guide surface 17b, which allows the dust in the flow space 175 to be gradually guided to both sides of the protrusion 174 under the guidance of the first guide surface 17a and the second guide surface 17b. This reduces the obstruction force of the protrusion 174 on the dust, making the flow of dust in the dust collection body 17 smoother and more stable, and improving the dust collection effect.

[0146] According to some embodiments of this application, please refer to Figure 11 This application provides a solar cell edge cleaning device, including: an edge cleaning mechanism 30 for etching an edge area 22 to be cleaned on a solar cell 20; and a dust removal mechanism 10, as described above, wherein a dust removal surface 113 is disposed facing the edge area 22 to be cleaned, and the dust removal mechanism 10 is configured to blow air and suck air into the edge area 22 to be cleaned.

[0147] The edge cleaning mechanism 30 refers to a device capable of removing structures from the edge-to-clean area 22, which may be, but is not limited to, a laser device. During the fabrication of the solar cell 20, to facilitate the encapsulation and insulation of the outer periphery of the film layer 23, the portion of the film layer 23 located in the edge-to-clean area 22 needs to be removed. The edge cleaning mechanism 30 can be positioned in various ways during the etching of the edge-to-clean area 22; for example, it can be located above or below the edge-to-clean area 22.

[0148] In some examples, the dust removal mechanism 10 is located above the edge-cleaning area 22, and the edge-cleaning mechanism 30 is located below the edge-cleaning area 22. In this case, the energy generated in the edge-cleaning area can pass through the substrate glass 21 of the solar cell 20 and act on the edge-cleaning area 22 to etch the film layer 23 in the edge-cleaning area 22.

[0149] During the edge cleaning process, the suction port 112 and the air blowing port 111 of the dust removal mechanism 10 can be simultaneously directed towards the area 22 to be cleaned, so that the dust blown by the air blowing port 111 is sucked in by the suction port 112 to complete the dust removal operation. When the edge cleaning mechanism 30 is a laser device, the dust removal range of the dust removal mechanism 10 can cover the scanning length of the edge cleaning mechanism 30 on the area 22 to be cleaned. At the same time, the dust removal range of the dust removal mechanism 10 can also cover part of the area 22 to be cleaned; or it can cover it completely, so that the dust removal mechanism 10 does not move with the edge cleaning mechanism 30 during the edge cleaning process.

[0150] This design effectively improves dust removal and reduces the impact on the performance of solar cells 20.

[0151] Optionally, according to some embodiments of this application, please refer to Figure 11 The edge cleaning mechanism 30 and the dust removal mechanism 10 are respectively located on opposite sides of the substrate glass 21 of the solar cell 20, and the edge cleaning mechanism 30 is located on the side of the substrate glass 21 facing away from the edge to be cleaned area 22. The edge cleaning mechanism 30 is constructed as a laser device.

[0152] As can be seen, during the edge cleaning process, the laser emitted by the edge cleaning mechanism 30 can penetrate the substrate glass 21 and act on the area to be cleaned 22 to etch the film layer 23 located on the area to be cleaned 22. Since the edge cleaning mechanism 30 and the dust removal mechanism 10 are distributed on opposite sides of the substrate glass 21, they will not interfere with each other during operation; at the same time, the blown dust will not affect the edge cleaning mechanism 30, so that the edge cleaning mechanism 30 can work stably.

[0153] This design rationally distributes the edge cleaning mechanism 30 and the dust removal mechanism 10, ensuring that they do not interfere with each other during operation. At the same time, the dust blown up will not affect the edge cleaning mechanism 30, allowing the edge cleaning mechanism 30 to work stably.

[0154] Optionally, according to some embodiments of this application, please refer to Figure 12 The edge cleaning mechanism 30 is constructed as a laser device. The single scan length of the edge cleaning mechanism 30 along the traveling direction in the edge-to-clean area 22 is denoted as L1, and the length of the suction port 112 is denoted as L2, wherein L2 / L1≥2.

[0155] When the edge-cleaning mechanism 30 is a laser device, such as a laser galvanometer, the galvanometer can focus the laser spot along the travel direction and then repeat the scanning process perpendicular to the travel direction until the edge-cleaning width is reached. In this case, the length of a single scan of the laser spot falling on the area 22 to be cleaned, denoted as L1, is recorded as L1. The travel direction refers to the direction formed by the edge-cleaning mechanism 30 moving along the perimeter of the area 22 to be cleaned in order to complete the edge-cleaning operation.

[0156] In this embodiment, the ratio of the length of the suction port 112 to the scanning length is greater than 2, indicating that the effective range of the suction port 112 can completely cover the scanning range of the edge cleaning mechanism 30. This allows the dust generated during etching to be promptly removed by the suction port 112. Simultaneously, during the edge cleaning process, the edge cleaning mechanism 30 and the dust removal mechanism 10 can be controlled to move synchronously to accelerate the processing cycle.

[0157] This design allows the suction port 112 to completely cover the scanning range of the edge cleaning mechanism 30, enabling the dust removal mechanism 10 and the edge cleaning mechanism 30 to move continuously and improve dust removal efficiency.

[0158] According to some embodiments of this application, please refer to Figure 13 This application provides a method for cleaning the edge of a solar cell, employing any of the solar cell edge cleaning apparatuses described in the present invention, the method comprising the following steps:

[0159] S100, both the dust removal mechanism 10 and the edge cleaning mechanism 30 are oriented towards the edge-to-be-cleaned area 22 on the solar cell 20, so that the suction range of the dust removal mechanism 10 on the edge-to-be-cleaned area 22 at least partially overlaps with the etching range of the edge cleaning mechanism 30 on the edge-to-be-cleaned area 22. Of course, in some examples, the edge cleaning mechanism is a laser galvanometer device, which can use a galvanometer to scan the laser focused spot along the direction of travel of the mechanism, and then repeat the single scanning process perpendicular to the direction of travel until the cumulative width reaches the width of the edge-to-be-cleaned area 22.

[0160] S200 controls the operation of the edge cleaning mechanism 30, and controls the air intake 18 to allow air to pass through and the exhaust 181 to be evacuated.

[0161] S300, the edge cleaning mechanism 30 and the dust removal mechanism 10 move in the same direction along the extension direction of the edge cleaning area 22.

[0162] In step S100, both the dust removal mechanism 10 and the edge cleaning mechanism 30 face the area 22 to be cleaned. This is to ensure that the blowing and suction of the dust removal mechanism 10 and the etching of the edge cleaning mechanism 30 both act on the area 22 to be cleaned. The edge cleaning mechanism 30 faces the area 22 to be cleaned, is located below the area 22 to be cleaned, and faces upward toward the area 22 to be cleaned.

[0163] In step S200, when the dust removal mechanism 10 also includes a dust collection body 17, the dust collection chamber 171 of the dust collection body 17 can be suctioned to create a negative pressure at the collection port 172.

[0164] This design effectively improves dust removal and reduces the impact on the performance of solar cells 20.

[0165] According to some embodiments of this application, this application provides a solar cell production system, which includes the solar cell edge cleaning device of any of the above.

[0166] According to some embodiments of this application, please refer to Figures 1 to 12 This application provides a solar cell edge cleaning device, which includes an edge cleaning mechanism 30 and a dust removal mechanism 10. The edge cleaning mechanism 30 is a laser device. The dust removal mechanism 10 includes a dust removal component 11, a dust collector 17, an air inlet 18, and an exhaust component 181. The dust removal component 11 includes a first base 16, a second base 161, and a separator 162 separated between the first base 16 and the second base 161. The separator 162 has a first cavity 12 and a second cavity 13 on both sides along its own thickness direction. One end of the separator 162 forms an air blowing port 111 and a suction port 112 with the first base 16 and the second base 161, respectively. The air inlet 18 is connected to the first cavity 12, and the exhaust component 181 is connected to the second cavity 13. The dust collection body 17 has a dust collection chamber 171 and a collection port 172 communicating with the dust collection chamber 171. The dust removal component 11 is disposed in the dust collection chamber 171, and the collection port 172, the blowing port 111 and the suction port 112 are located on the same side of the dust removal mechanism 10.

[0167] 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.

[0168] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent 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 patent application should be determined by the appended claims.

Claims

1. A dust removal mechanism, characterized in that, The dust removal mechanism includes: A dust removal assembly (11) is provided with an air blowing port (111) and a suction port (112). Both the air blowing port (111) and the suction port (112) are configured to face the edge area (22) to be cleaned on the solar cell (20). The dust removal assembly (11) has a first chamber (12) and a second chamber (13) separated from each other. An air intake component (18) and an exhaust component (181) are both disposed in the dust removal assembly (11). The air intake component (18) is connected to the air blowing port (111) through the first cavity (12), and the exhaust component (181) is connected to the suction port (112) through the second cavity (13). The first cavity (12) includes an air intake channel (125) and a drainage channel (126) connected sequentially along the first direction (X). The drainage channel (126) is connected to the air blowing port (111), and the air intake channel (125) is connected to the air intake component (18). The closer the end of the air intake channel (125) connected to the drainage channel (126) is to the drainage channel (126), the smaller the flow area.

2. The dust removal mechanism according to claim 1, characterized in that, The drainage channel (126) is connected to the air blowing port (111) and the air intake channel (125) at opposite ends along the second direction (Y), respectively. The second direction (Y) is configured to be inclined relative to the first direction (X). The end of the drainage channel (126) connected to the air blowing port (111) is closer to the suction port (112) than the end of the drainage channel (126) connected to the air intake channel (125).

3. The dust removal mechanism according to claim 2, characterized in that, The angle between the first direction (X) and the second direction (Y) is denoted as θ, where 10°≤θ≤60°.

4. The dust removal mechanism according to claim 1, characterized in that, The cavity wall of the first cavity (12) includes a first wall (121) and a second wall (123) opposite each other along a third direction (Z), a flow-blocking part (122) protruding from the first wall (121), and a flow-draining part (124) protruding from the second wall (123). The first wall (121) is closer to the second cavity (13) than the second wall (123). The flow-blocking part (122) is located upstream of the flow-draining part (124) along the first direction (X), and the projections of the two along the first direction (X) have at least partial overlap. The air intake channel (125) is formed between the portion of the first wall (121), the flow-blocking portion (122), the second wall (123), and the portion of the flow-draining portion (124) away from the air outlet (111), and the flow-draining channel (126) is formed between the flow-blocking portion (122) and the flow-draining portion (124), and the third direction (Z) intersects with the first direction (X).

5. The dust removal mechanism according to claim 4, characterized in that, The flow-blocking part (122) includes a flow-blocking surface (12a) disposed away from the flow-draining part (124) along the first direction (X). The flow-blocking surface (12a) includes a second end (1a2) and a first end (1a1) distributed sequentially along the first direction (X). The flow-blocking surface (12a) is inclined relative to the first direction (X), and the first end (1a1) is more biased toward the second wall (123) than the second end (1a2).

6. The dust removal mechanism according to claim 4, characterized in that, The flow-blocking part (122) includes a mating surface (12c) disposed along the first direction (X) toward the flow-draining part (124). The mating surface (12c) includes a third end (1c1) and a fourth end (1c2) sequentially distributed along the first direction (X). The mating surface (12c) is inclined relative to the first direction (X), and the third end (1c1) is more biased toward the second wall (123) than the fourth end (1c2).

7. The dust removal mechanism according to claim 6, characterized in that, The distance between the mating surface (12c) and the drainage part (124) is denoted as D1, and the distance between the third end (1c1) of the mating surface (12c) and the fourth end (1c2) of the mating surface (12c) is denoted as L0, wherein L0 / D1≥5.

8. The dust removal mechanism according to claim 1, characterized in that, The dust removal assembly (11) also includes a blocking protrusion (14), which protrudes from the cavity wall of the air intake channel (125).

9. The dust removal mechanism according to claim 8, characterized in that, The blocking protrusions (14) include a plurality of protrusions and are spaced apart along the first direction (X) to form at least two protrusion groups (141). The blocking protrusions (14) in each protrusion group (141) are arranged side by side and spaced apart to form a flow gap (142) between two adjacent blocking protrusions (14). In two adjacent protrusion groups (141), the flow gap (142) in one group is staggered from the flow gap (142) in the other group in the first direction (X).

10. The dust removal mechanism according to claim 1, characterized in that, The dust removal assembly (11) includes a first seat (16), a second seat (161), and a partition (162) spaced between the first seat (16) and the second seat (161). The partition (162) forms the first cavity (12) and the second cavity (13) with the first seat (16) and the second seat (161), respectively. One end of the partition (162) forms the air blowing port (111) and the suction port (112) with the first seat (16) and the second seat (161), respectively. The air inlet (18) is located on the first seat (16), and the exhaust port (181) is located on the second seat (161).

11. The dust removal mechanism according to claim 1, characterized in that, The dust removal assembly (11) further includes a diversion protrusion (15), which is disposed on the cavity wall of the second cavity (13) and divides the second cavity (13) into at least two branch channels (131), each of which is connected between the suction port (112) and the discharge member (181).

12. The dust removal mechanism according to claim 11, characterized in that, The diversion protrusion (15) includes a diversion end (151) at one end near the suction port (112). The dimension of the diversion end (151) along the fourth direction is denoted as W. The closer the diversion end (151) is to the suction port (112), the smaller its dimension W is. The fourth direction is the distribution direction of each branch channel (131).

13. The dust removal mechanism according to any one of claims 1-12, characterized in that, The dust removal mechanism further includes a dust collection body (17), which has a collection port (172) and a dust collection chamber (171) communicating with the collection port (172). The collection port (172) is configured to allow at least a portion of the dust escaping from the dust removal assembly (11) to enter the dust collection chamber (171).

14. The dust removal mechanism according to claim 13, characterized in that, The dust removal component (11) is fitted inside the dust collection body (17), and the suction port (112) and the blowing port (111) are both located at the end of the dust collection body (17) with the collection port (172).

15. The dust removal mechanism according to claim 14, characterized in that, The dust removal component (11) includes a dust removal surface (113), the air blowing port (111) and the suction port (112) are both located on the dust removal surface (113), and the dust removal surface (113) extends out of the collection port (172).

16. The dust removal mechanism according to claim 14, characterized in that, The surface of the dust removal assembly (11) is provided with a boss (174), which is provided on the cavity wall of the dust collection chamber (171) so that a flow space (175) is formed between the side of the boss (174) facing the suction port (112), the cavity wall of the dust collection chamber (171) and the dust removal assembly (11).

17. The dust removal mechanism according to claim 16, characterized in that, The side of the boss (174) facing the suction port (112) includes a first guide surface (17a) and a second guide surface (17b). Along the direction from the suction port (112) to the position where the discharge member (181) communicates on the dust removal assembly (11), the distance D2 between the first guide surface (17a) and the second guide surface (17b) gradually increases.

18. A solar cell edge cleaning device, characterized in that, include: The edge cleaning mechanism (30) is used to etch the edge-cleaning area (22) on the solar cell (20); According to any one of claims 1-17, the suction port (112) and the blowing port (111) are both arranged toward the edge area to be cleaned (22), and the dust removal mechanism is configured to blow air and suction the edge area to be cleaned (22).

19. The solar cell edge cleaning device according to claim 18, characterized in that, The edge cleaning mechanism (30) and the dust removal mechanism are respectively located on opposite sides of the substrate glass (21) of the solar cell (20), and the edge cleaning mechanism (30) is located on the side of the substrate glass (21) facing away from the edge to be cleaned area (22). The edge cleaning mechanism (30) is constructed as a laser device.

20. The solar cell edge cleaning device according to claim 18, characterized in that, The edge cleaning mechanism (30) is constructed as a laser device. The single scan length of the edge cleaning mechanism (30) along the direction of travel on the edge to be cleaned area (22) is denoted as L1, and the length of the suction port (112) is denoted as L2, wherein L2 / L1≥2.

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