Edge cleaning system and edge cleaning method

Abstract

An edge cleaning system (100) and an edge cleaning method, the edge cleaning system comprising: at least one conveying device for conveying a product (200), wherein the conveying device comprises an overturning mechanism (11) and a conveying mechanism (12) for carrying and conveying the product (200), the conveying mechanism (12) is mounted on the overturning mechanism (11), and the overturning mechanism (11) is configured to drive the conveying mechanism (12) to turn over; and a laser edge-cleaning device (30), wherein one conveying device is a feeding device (10), the overturning mechanism (11) of the feeding device (10) can drive, by means of the conveying mechanism (12), the product (200) to turn over from a state where a thin film layer faces upwards to a state where the thin film layer faces downwards, the conveying mechanism (12) of the feeding device (10) can feed, onto the laser edge-cleaning device (30), the product (200) in the state where the thin film layer faces downwards, and the laser edge-cleaning device (30) is configured to clean an edge of the thin film layer of the product (200). Compared with a situation whereby the thin film layer is located above a substrate during edge cleaning, dust formed by edge cleaning naturally falls away under the action of gravity, and in cooperation with a vacuum cleaner, dust is prevented from remaining on the substrate, thereby ensuring the dust cleaning effect, and further ensuring the overall yield of the product (200).

Description

Edge cleaning system and edge cleaning method Technical Field

[0001] The present invention relates to the technical field of solar cell manufacturing equipment, and in particular to an edge cleaning system and an edge cleaning method. Background Art

[0002] Before packaging, some products undergo edge cleaning along the substrate to remove the edges of the thin film layer attached to the substrate and ensure packaging reliability. For example, during the solar cell manufacturing process, edge cleaning is performed along the edge of the glass substrate to remove the edges of the thin film layer to prevent leakage and ensure the reliability of the solar cell after packaging.

[0003] During edge cleaning, the thin film layer is positioned above the substrate, and the laser from the laser edge cleaning mechanism strikes the edge of the substrate to remove the edge portion of the thin film layer. However, this method makes it difficult for dust to be removed by vacuuming equipment and will remain on the substrate, affecting the overall product yield.

[0004] Summary of the Invention

[0005] Based on this, it is necessary to provide a cleaning system and cleaning method that can avoid dust retention and thus ensure the improvement of packaging yield, in order to solve the problem that traditional cleaning methods cause dust retention and affect product packaging yield.

[0006] An edge cleaning system, comprising:

[0007] At least one conveying device for conveying products, the conveying device comprising a turning mechanism and a conveying mechanism for carrying and conveying products, the conveying mechanism being mounted on the turning mechanism, and the turning mechanism being used to drive the conveying mechanism to turn over;

[0008] Laser edge cleaning device, one of the conveying devices is a loading device; the flipping mechanism of the loading device can drive the product to flip from the film layer upward state to the film layer downward state through the conveying mechanism, and the conveying mechanism of the loading device can load the product in the film layer downward state onto the laser edge cleaning device, and the laser edge cleaning device is used to remove the edge part of the film layer of the product.

[0009] In one embodiment, the number of the conveying devices is two, and the other conveying device is a feeding device;

[0010] The laser edge cleaning device can unload the product after edge cleaning onto the unloading device, the flipping mechanism of the unloading device can drive the product to flip from the film layer downward state to the film layer upward state through the conveying mechanism, and the conveying mechanism of the unloading device can output the product in the film layer upward state.

[0011] In one embodiment, the conveying mechanism is provided with a conveying wheel set at at least one end in the first direction;

[0012] Each set of the conveying wheel groups includes two conveying wheels spaced apart in the second direction and used for carrying the product, and the conveying wheel groups are used for conveying the product along the third direction; the first direction, the second direction and the third direction intersect with each other.

[0013] In one embodiment, the conveying mechanism is provided with the conveying wheel groups at both ends in the first direction; and at least two groups of the conveying wheel groups are provided at each end of the conveying mechanism along the third direction.

[0014] In one embodiment, the conveying mechanism further includes a conveying drive assembly, the conveying wheel set is connected to the conveying drive assembly, and the conveying drive assembly is used to drive the conveying wheel to rotate so as to convey the product along the third direction.

[0015] In one embodiment, the conveying device further includes a first guide mechanism, wherein the first guide mechanism includes guide wheels distributed at both ends of the conveying mechanism in a first direction;

[0016] When the conveying mechanism conveys the product, the guide wheels at both ends can abut against the product to guide the product in a third direction in which the conveying mechanism conveys the product; the first direction intersects with the third direction.

[0017] In one embodiment, the conveying device further includes a clamping mechanism, which is installed on the conveying mechanism. When the flipping mechanism drives the conveying mechanism to flip, the clamping mechanism is used to clamp the product so that the product and the conveying mechanism remain relatively fixed.

[0018] In one embodiment, the clamping mechanism includes a clamping drive and a clamping block, wherein the clamping block is connected to the clamping drive, and the clamping drive can drive the two clamping parts of the clamping block to move closer or farther away.

[0019] In one embodiment, the conveying device further includes a mounting seat, the flip mechanism includes a flip drive assembly, a flip plate, and a flip shaft, the flip plate is connected to the flip drive assembly, the conveying mechanism is mounted on the flip plate, and the flip plate is connected to the mounting seat via the flip shaft;

[0020] The flip drive assembly can drive the flip plate to rotate relative to the mounting seat via the flip shaft, so as to drive the conveying mechanism to flip.

[0021] In one embodiment, the laser edge cleaning device includes:

[0022] A carrying mechanism, wherein the conveying mechanism of the loading device is capable of loading the product onto the carrying mechanism;

[0023] A dragging mechanism and a laser edge cleaning mechanism are installed on the supporting mechanism; the laser edge cleaning mechanism can move along a first direction relative to the supporting mechanism to clean the edges of the product; the dragging mechanism is used to clamp the edge portion of the product and can move along a third direction relative to the supporting mechanism to drag the product, and the laser edge cleaning mechanism can clean the edges of the product along the third direction; the first direction intersects with the third direction.

[0024] In one embodiment, the laser edge cleaning device includes two laser edge cleaning mechanisms, and the two laser edge cleaning mechanisms are arranged along the first direction;

[0025] When the dragging mechanism drags the product to move along the third direction, the two laser edge cleaning mechanisms respectively clean the edges of both ends of the product in the first direction.

[0026] In one embodiment, the carrying mechanism includes support wheels for supporting edge portions of the product in the first direction, and when the dragging mechanism drags the product, the support wheels rotate relative to the product.

[0027] In one embodiment, the laser edge cleaning device further includes a second guide mechanism, which is provided on the supporting mechanism, and the dragging mechanism is connected to the supporting mechanism through the second guide mechanism, and the second guide mechanism is used to guide the dragging mechanism along the third direction.

[0028] In one embodiment, the laser edge cleaning mechanism includes:

[0029] A laser emission module, configured to emit a first laser and a second laser;

[0030] a beam combining module, wherein both the first laser and the second laser emitted by the laser emitting module can be emitted toward the beam combining module; the beam combining module is configured to transmit one of the first laser and the second laser and to reflect the other of the first laser and the second laser so that the first laser and the second laser are emitted in parallel;

[0031] The first laser is used to draw an isolation line on the thin film layer of the product to divide the thin film layer of the product into a clearing area and a retaining area, and the second laser is used to clear the clearing area.

[0032] In one embodiment, the laser edge cleaning mechanism further includes a first galvanometer, which is disposed on an optical path of the first laser directed toward the beam combining module, and is configured to enable the first laser to draw the isolation line on the thin film layer along a first preset trajectory.

[0033] In one embodiment, the laser edge cleaning mechanism further includes a second galvanometer, which is disposed on an optical path of the second laser directed toward the beam combining module, and is configured to enable the second laser to clear the cleaning area along a second preset trajectory.

[0034] In one embodiment, the first laser is green light, and the second laser is red light.

[0035] In one embodiment, the power of the first laser is less than the power of the second laser.

[0036] A method for edge cleaning, comprising the steps of:

[0037] Turn the product from the film layer upward state to the film layer downward state;

[0038] Loading the product with the film layer facing downward to the laser edge cleaning station;

[0039] The edge portion of the film layer of the product in the laser edge cleaning station is cleaned.

[0040] In one embodiment, the edge of the film layer of the product in the laser edge cleaning station is cleaned, comprising the steps of:

[0041] removing an edge portion of one end of the film layer in the third direction;

[0042] Simultaneously removing edge portions of both ends of the film layer in the first direction;

[0043] removing an edge portion of the film layer at the other end in the third direction;

[0044] The first direction intersects with the third direction.

[0045] In the above-mentioned edge cleaning system and method, when cleaning the edges of the product, the thin film layer of the product is located below the substrate. In this way, compared with the situation where the thin film layer is located above the substrate during edge cleaning, the dust formed by edge cleaning will naturally fall off under the action of gravity. Combined with the dust collection equipment, the dust is prevented from remaining on the substrate, thereby ensuring the dust cleaning effect and thus ensuring the overall yield of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] FIG1 is an axonometric diagram of an edge cleaning system provided in one embodiment of the present application;

[0047] FIG2 is an axonometric view of the conveying device of the edge cleaning system described in FIG1 ;

[0048] FIG3 is an enlarged view of point A of the conveying device shown in FIG2 ;

[0049] Figure 4 is a plan view of the product (Figure 4 shows the isolation line, retention area and clearance area)

[0050] FIG5 is a plan view of the laser edge cleaning mechanism of the edge cleaning system shown in FIG1 ;

[0051] FIG6 is an exploded view of the laser edge cleaning mechanism shown in FIG5 ;

[0052] FIG7 is an optical path diagram of the laser edge cleaning mechanism of the edge cleaning system shown in FIG1 ( FIG7 includes two laser edge cleaning mechanisms);

[0053] FIG8 is a flowchart of an edge clearing method provided in an embodiment of the present application.

[0054] Description of reference numerals:

[0055] 100. Edge cleaning system; 10. Loading device; 11. Turning mechanism; 111. Turning drive assembly; 112. Turning plate; 113. Turning shaft; 12. Conveying mechanism; 121. Conveying wheel assembly; 1211. Conveying wheel; 122. Conveying drive assembly; 1221. Conveying drive member; 1222. First transmission assembly; 13. First guide mechanism; 131. Guide wheel; 14. Clamping mechanism; 141. Clamping drive member; 142. Clamping block; 15. Mounting seat; 20. Unloading device; 30. Laser edge cleaning Device; 31. Carrying mechanism; 311. Support wheel; 32. Laser edge cleaning mechanism; 321. Laser emission module; 3211. First laser; 3212. Second laser; 322. Beam combining module; 323. First galvanometer; 324. Second galvanometer; 325. Second reflector group; 3251. Second reflector; 33. Drag mechanism; 331. Mounting frame; 332. Clamping assembly; 34. Second guide mechanism; 200. Product; 201. Isolation line; 202. Retention area; 203. Clearing area. DETAILED DESCRIPTION

[0056] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0059] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0060] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0061] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0062] Referring to Figures 1-3, one embodiment of the present application provides an edge cleaning system 100 for cleaning the edge portion of a thin film layer attached to a substrate of a product 200. Referring to Figure 4, the edge cleaning system 100 is capable of cleaning the cleaning area 203 in Figure 4. Specifically, the edge cleaning system 100 is used for cleaning the edges of solar cells to remove the edge portion of the thin film layer on the glass substrate of the solar cell to prevent leakage and thereby ensure the reliability of the solar cell package. It is conceivable that in other embodiments, there is no limitation on the type of product 200 that the edge cleaning system 100 is used to clean.

[0063] The edge cleaning system 100 includes at least one conveying device, which includes a turning mechanism 11 and a conveying mechanism 12. The conveying mechanism 12 is used to carry and convey the product 200. The conveying mechanism 12 is mounted on the turning mechanism 11. The turning mechanism 11 is used to turn the conveying mechanism 12. When the conveying mechanism 12 turns, the product 200 carried on the conveying mechanism 12 will turn along with the conveying mechanism 12.

[0064] The edge cleaning system 100 also includes a laser edge cleaning device 30 and a conveying device, a loading device 10, which is used to convey the product 200 to the laser edge cleaning device 30. When the edge cleaning system 100 includes one conveying device, the conveying device is the loading device 10. When the edge cleaning system 100 includes two conveying devices, one of the conveying devices is the loading device 10. The flipping mechanism 11 of the loading device 10 can drive the product 200 from a film-layer-upward position to a film-layer-downward position via the conveying mechanism 12. The conveying mechanism 12 of the loading device 10 can load the product 200 in the film-layer-downward position onto the laser edge cleaning device 30. The laser edge cleaning device 30 is used to remove the edge portion of the film layer of the product 200.

[0065] It should be noted that when the product 200 is in a state with the film layer facing upward, the film layer is located above the substrate, and when the product 200 is in a state with the film layer facing downward, the film layer is located below the substrate.

[0066] When performing edge cleaning on a product 200, the aforementioned edge cleaning system 100 loads the product 200 onto the conveyor mechanism 12 of the loading device 10, with the thin film layer of the product 200 positioned above the substrate. The flipping mechanism 11 of the loading device 10 drives the conveyor mechanism 12 to flip, which in turn flips the product 200 from a film-layer-up position to a film-layer-down position. The conveyor mechanism 12 then transports the product 200, with the film layer facing downward, to the laser edge cleaning device 30, which performs edge cleaning on the product 200 while the film layer is facing downward. Specifically, the laser edge cleaning device 30 removes the edges of the film layer of the product 200.

[0067] The edge cleaning system 100 provided in the embodiment of the present application is such that, when cleaning the edge of the product 200, the thin film layer of the product 200 is located below the substrate. In this way, compared with the case where the thin film layer is located above the substrate during edge cleaning, the dust formed by edge cleaning will naturally fall off under the action of gravity. In combination with the dust collection equipment, the dust is prevented from remaining on the substrate, thereby ensuring the dust cleaning effect and further ensuring the overall yield of the product 200.

[0068] In some specific embodiments, the laser of the laser edge cleaning device 30 can be directly emitted to the thin film layer to remove the edge portion of the thin film layer. In other specific embodiments, the laser of the laser edge cleaning device 30 can also be emitted to the thin film layer through the substrate to remove the edge portion of the thin film layer. This is not limited here.

[0069] In some embodiments, there are two conveying devices: one is a loading device 10, and the other is an unloading device 20. The laser edge cleaning device 30 can unload the cleaned product 200 onto the unloading device 20. The flipping mechanism 11 of the unloading device 20 can, via the conveying mechanism 12, flip the product 200 from a film-layer-downward position to a film-layer-upward position. The conveying mechanism 12 of the unloading device 20 can then deliver the product 200 with the film layer facing upward. The provision of the unloading device 20 facilitates unloading of the product 200 with the film layer facing upward, facilitating the next process step.

[0070] In some embodiments, the conveying mechanism 12 is provided with a conveying wheel assembly 121 at least at one end thereof in the first direction. Each conveying wheel assembly 121 includes two conveying wheels 1211 spaced apart in the second direction. The two conveying wheels 1211 in each conveying wheel assembly 121 are capable of carrying the product 200 and conveying the product 200 along a third direction when the conveying wheels 1211 rotate. The first direction, the second direction, and the third direction intersect. Specifically, the first direction, the second direction, and the third direction are perpendicular to each other. Referring to FIG. 1 , the first direction is the X direction in FIG. 1 , the second direction is the Z direction in FIG. 1 , and the third direction is the Y direction in FIG. 1 .

[0071] With the above arrangement, regardless of whether the film layer of the product 200 is facing downward or upward, the conveying wheel 1211 supports the product 200, which can ensure the conveying effect of the product 200 when the film layer of the product 200 is facing upward, and can also ensure the conveying effect of the product 200 when the film layer of the product 200 is facing downward.

[0072] In some embodiments, the distance between the two conveyor wheels 1211 of each conveyor wheel assembly 121 is equal to the thickness of the product 200, and the product 200 is clamped between the two conveyor wheels 1211. In this way, when the turnover mechanism 11 drives the conveyor mechanism 13 to flip, the two conveyor wheels 1211 of the conveyor wheel assembly 121 can clamp the product 200, preventing the product 200 from shifting between the conveyor mechanism 12 and the conveyor mechanism 12 during flipping, and thus escaping from the conveyor mechanism 12. Of course, in other embodiments, the distance between the two conveyor wheels 1211 of each conveyor wheel assembly 121 can be set to be greater than the thickness of the product 200. In this case, the conveyor wheels 1211 only serve to carry the product 200.

[0073] Continuing with Figure 2 , the conveying mechanism 12 is equipped with conveying wheel assemblies 121 at both ends in the first direction. Along the third direction, at least two conveying wheel assemblies 121 are provided at each end of the conveying mechanism 12. This ensures that when the conveying mechanism 12 is conveying the product 200, the conveying wheels 1211 at both ends can support the product 200 at both ends in the first direction. Furthermore, the conveying wheel assemblies 121 provided in the third direction can support the product 200 at multiple locations, ensuring smooth conveyance of the product 200.

[0074] Furthermore, the conveying mechanism 12 further includes a conveying drive assembly 122, to which the conveying wheel assembly 121 is connected. The conveying drive assembly 122 is configured to drive the conveying wheel 1211 to rotate, thereby conveying the product 200 in the third direction. Specifically, the conveying drive assembly 122 includes a conveying drive member 1221, which is configured to drive the conveying wheel 1211 to rotate. The conveying drive member 1221 is a motor or a rotary cylinder. In other embodiments, the conveying drive assembly 122 further includes a first transmission assembly 1222, through which the conveying drive member 1221 drives the conveying wheel 1211 to rotate.

[0075] It should be noted that, in order to enable the multiple conveying wheels 1211 to rotate under the action of the same conveying driving member 1221 , the conveying wheels 1211 are connected via a first transmission assembly 1222 , such as a conveying belt and a transmission wheel.

[0076] In some specific embodiments, the conveying mechanism 12 includes two conveying drive assemblies 122, and the two conveying drive assemblies 122 cooperate to drive the rotation of all conveying wheels 1211. Of course, in other embodiments, the number of conveying drive assemblies 122 included in the conveying mechanism 12 is not limited.

[0077] It is conceivable that in other embodiments, the conveying mechanism 12 may be configured in other ways, such as the conveying mechanism 12 includes a conveyor belt, and the conveyor belt is used to convey the product 200 in the third direction.

[0078] In some embodiments, referring again to Figures 2 and 3 , the conveying device further includes a first guide mechanism 13 comprising guide wheels 131 distributed along a first direction at both ends of the conveying mechanism 12. When the conveying mechanism 12 is conveying the product 200, the guide wheels 131 at both ends can abut against the product 200 to guide the product 200 in a third direction. Specifically, when the conveying mechanism 12 is conveying the product 200 in the third direction, both ends of the product 200 in the first direction contact the guide wheels 131 at their respective ends. The combined action of the guide wheels 131 at both ends maintains the product 200 in place on the conveying mechanism 12, preventing the product 200 from straying. Furthermore, due to rolling friction between the guide wheels 131 and the product 200, wear on the product 200 caused by the first guide mechanism 13 is reduced.

[0079] In some embodiments, the conveying device further includes a clamping mechanism 14, which is mounted on the conveying mechanism 12. When the turning mechanism 11 drives the conveying mechanism 12 to turn the product 200, the clamping mechanism 14 is used to clamp the product 200 so that the product 200 remains relatively fixed to the conveying mechanism 12. The clamping mechanism 14 is provided to prevent the product 200 from escaping from the conveying mechanism 12 when the conveying mechanism 12 turns the product 200.

[0080] Specifically, the clamping mechanism 14 includes a clamping driver 141 and a clamping block 142. The clamping block 142 is connected to the clamping driver 141. The clamping driver 141 drives the two clamping parts of the clamping block 142 toward or away from each other. When the two clamping parts approach, the clamping block 142 can clamp the product 200. When the two clamping parts move away from each other, the clamping block 142 can release the product 200. Specifically, the clamping driver 141 is a pneumatic cylinder.

[0081] It is understandable that in other embodiments, there is no limitation on the configuration of the clamping mechanism 14 , as long as it can achieve the effect of clamping and releasing the product 200 .

[0082] In some embodiments, referring again to Figures 1 and 2 , the conveying device further includes a mounting base 15, and the flip mechanism 11 includes a flip drive assembly 111, a flip plate 112, and a flip shaft 113. The flip plate 112 is connected to the flip drive assembly, and the conveying mechanism 12 is mounted on the flip plate 112, which is connected to the mounting base 15 via the flip shaft 113. The flip drive assembly 111 is capable of driving the flip plate 112 to rotate relative to the mounting base 15 via the flip shaft 113, thereby driving the conveying mechanism 12, the first guide mechanism 13, and the clamping mechanism 14 to flip. This arrangement ensures smooth flipping of the conveying mechanism 12 by the flip mechanism 11.

[0083] Specifically, the flip drive assembly 111 includes a flip drive member, which is directly connected to the flip plate 112 and is a flip motor. Of course, in some other embodiments, the flip drive assembly 111 also includes a second transmission assembly, and the flip drive member is connected to the flip plate 112 via the second transmission assembly.

[0084] It should be understood that in other embodiments, there is no limitation on the configuration of the flipping mechanism 11 , as long as the effect of flipping the conveying mechanism 12 can be achieved.

[0085] In some embodiments, referring again to FIG1 , the laser edge cleaning device 30 includes a supporting mechanism 31, a laser edge cleaning mechanism 32, and a dragging mechanism 33. Both the laser edge cleaning mechanism 32 and the dragging mechanism 33 are mounted on the supporting mechanism 31. The conveying mechanism 12 of the loading device 10 is capable of loading the product 200 onto the supporting mechanism 31. The laser edge cleaning mechanism 32 is capable of moving relative to the supporting mechanism 31 in a first direction to perform edge cleaning on the product 200. The dragging mechanism 33 is configured to clamp the edge portion of the product 200 and is capable of moving relative to the supporting mechanism 31 in a third direction to drag the product 200. The laser edge cleaning mechanism 32 is capable of performing edge cleaning on the product 200 along the third direction.

[0086] When the conveying mechanism 12 of the loading device 10 conveys the product 200 onto the supporting mechanism 31, the laser edge cleaning mechanism 32 moves relative to the supporting mechanism 31 in a first direction to remove the edge portion of one end of the film layer in the third direction. The dragging mechanism 33 clamps the product 200 and drags it in the third direction. At this time, the laser edge cleaning mechanism 32 remains fixed relative to the supporting mechanism 31. As the product 200 moves relative to the supporting mechanism 31 in the third direction, the laser edge cleaning mechanism 32 can clean the edge of the product 200 in the third direction. Specifically, the laser edge cleaning device 30 includes two laser edge cleaning mechanisms 32, each capable of removing the edge portions of the film layer at both ends in the first direction. Thereafter, one of the laser edge cleaning mechanisms 32 moves relative to the supporting mechanism 31 in the first direction to remove the edge portion of the film layer at the other end in the third direction.

[0087] In a specific embodiment, the product 200 is a rectangular flat plate structure, the first direction is the width direction of the product 200, and the third direction is the length direction of the product 200.

[0088] With the above arrangement, since the dragging mechanism 33 clamps the edge of the product 200 while dragging it, the edge of the film layer that is in contact with the product 200 will eventually be removed, and the dragging mechanism 33 will not affect the remaining area 202 of the film layer. Furthermore, the cooperation of the two laser edge cleaning mechanisms 32 improves the efficiency of edge cleaning.

[0089] Furthermore, the support mechanism 31 includes support wheels 311, which are used to support the edges of the product 200 in the first direction. When the dragging mechanism 33 drags the product 200, the support wheels 311 rotate relative to the product 200. The support wheels 311 not only support the product 200 but also create rolling friction between the product 200 and the support wheels 311 when the product 200 moves in the third direction relative to the support mechanism 31, reducing wear on the product 200 caused by the support wheels 311.

[0090] It should be understood that in other embodiments, there is no limitation on the configuration of the supporting mechanism 31 , as long as it can achieve the effect of supporting the product 200 .

[0091] The laser edge cleaning device 30 also includes a second guide mechanism 34, which is mounted on the support mechanism 31. The dragging mechanism 33 is connected to the support mechanism 31 via the second guide mechanism 34. The second guide mechanism 34 is used to guide the dragging mechanism 33 in the third direction. Specifically, the dragging mechanism 33 includes a mounting frame 331 and a clamping assembly 332. The mounting frame 331 is mounted on the support mechanism 31 and is connected to the second guide mechanism 34 at both ends in the first direction. The clamping assembly 332 is used to clamp the edge of the product 200. The configuration of the clamping assembly 332 can be referred to as the clamping mechanism 14 described above and will not be described in detail here.

[0092] Referring to Figures 5-7 , the laser edge cleaning mechanism 32 includes a laser emitting module 321 and a beam combining module 322. Laser emitting module 321 is configured to emit a first laser and a second laser, and both the first and second lasers emitted by laser emitting module 321 are capable of being directed toward beam combining module 322. Beam combining module 322 is configured to transmit one of the first and second lasers and to reflect the other, such that the first and second lasers are emitted in parallel. The first laser is used to create an isolation line 201 in the thin film layer of product 200, thereby dividing the thin film layer of product 200 into a removal area 203 and a retention area 202. The second laser is used to remove the removal area 203.

[0093] It should be noted that the aforementioned clearing area 203 and retaining area 202 are two areas formed by the first laser scribing the isolation line 201 in the thin film layer. Retaining area 202 is the area of ​​the thin film layer that needs to be retained, while clearing area 203 is the area of ​​the thin film layer that needs to be removed. Typically, the power of the first laser is lower than the power of the second laser. When using the lower-power first laser for scribing and partitioning, the first laser does not need to operate over a large area for a long time, and will not significantly affect the retaining area 202. When the second laser clears clearing area 203, clearing area 203 and retaining area 202 are already separated by the first laser scribing line, and the second laser will not significantly affect the retaining area 202.

[0094] In the aforementioned laser edge cleaning mechanism 32, the first laser can divide the thin film layer of the product 200 into a removal area 203 and a retention area 202, and the second laser can clear the removal area 203. Compared to the prior art method of directly cleaning the thin film layer using the same laser, the first laser has less thermal impact on the retention area 202, and the second laser also has less thermal impact on the retention area 202 when clearing the removal area 203. Therefore, it can prevent the occurrence of burrs on the edge of the thin film layer after edge cleaning, ensuring the reliability of the solar cell package. Furthermore, after the first and second laser beams are combined by the beam combining module 322, the first and second laser beams are emitted in parallel. In this way, the first and second laser beams can be controlled to be combined (parallel and partially overlapping) and directed at the thin film layer, clearing the removal area 203 while marking the isolation line 201, thereby improving edge cleaning efficiency. Furthermore, when the first and second laser beams are combined and directed at the thin film layer, the line marked by the second laser can partially overlap the isolation line 201, ensuring that the removal area 203 is cleaned thoroughly, thereby ensuring effective edge cleaning.

[0095] It should be noted here that after the first laser draws the isolation line 201 or a part of the isolation line 201 on the product 200, the second laser controls the laser emission module 321 not to emit the first laser during the edge cleaning process. At this time, the first laser will not affect the edge cleaning of the second laser.

[0096] In some embodiments, the first laser is green and the second laser is red, and the wavelength of green light is smaller than that of red light. In this way, the thermal effect of the first laser on the thin film layer can be smaller than the thermal effect of the second laser on the thin film layer. In other embodiments, there is no limitation on the wavelengths of the first laser and the second laser. The power of the first laser and the second laser is set to be different so that the thermal effect of the first laser on the thin film layer is smaller than the thermal effect of the second laser on the thin film layer. For example, the power of the first laser is set to 10W-40W, and the power of the second laser is set to 100W-500W. In other embodiments, the thermal effect of the first laser on the thin film layer can be smaller than the thermal effect of the second laser on the thin film layer by setting the spot size of the first laser and the second laser different. This is not limited here.

[0097] In some embodiments, referring again to FIG. 7 , the laser emission module 321 includes a first laser 3211 and a second laser 3212. The first laser 3211 is configured to emit a first laser, and the second laser 3212 is configured to emit a second laser. Because the first laser and the second laser are emitted by two different lasers, the emission of the first laser and the second laser can be easily controlled.

[0098] In some other embodiments, the laser emission module 321 includes a laser, which is a dual-channel laser, one channel of the laser is used to emit a first laser, and the other channel is used to emit a second laser.

[0099] The beam combining module 322 includes a beam combining body, a first coating, and a second coating. Both the first coating and the second coating are provided on the beam combining body. The first coating is configured to transmit one of the first laser beam and the second laser beam, while the second coating is configured to reflect the other of the first laser beam and the second laser beam. In some embodiments, the beam combining module 322 is configured to transmit the first laser beam and reflect the first laser beam. In this case, the first coating is configured to transmit the first laser beam, while the second coating is configured to reflect the second laser beam. In other embodiments, the beam combining module 322 is configured to reflect the first laser beam and transmit the second laser beam. In this case, the first coating is configured to transmit the second laser beam, while the second coating is configured to reflect the first laser beam.

[0100] Furthermore, the cross-sectional shape of the beam combining body is a triangle, the first coating is provided on one side of the beam combining body, and the second coating is provided on the other side of the beam combining body. This arrangement enables one of the first laser and the second laser to pass through the first coating and be emitted through the second coating. Since the other of the first laser and the second laser is reflected by the second coating, at this time, both the first laser and the second laser are emitted from the second coating, thereby ensuring that the first laser and the second laser are ultimately emitted in parallel. In some specific embodiments, the cross-sectional shape of the beam combining body is an isosceles right triangle, the first coating is provided on a right-angled side of the beam combining body, and the second coating is provided on the hypotenuse of the beam combining body. In other embodiments, the cross-sectional shape of the beam combining body may also be an ordinary triangle, which is not limited here.

[0101] It should be noted that when beam combining module 322 is configured to transmit the first laser beam and reflect the second laser beam, the second coating layer does not block the first laser beam after the first laser beam passes through the first coating layer. In other words, the second coating layer only reflects the second laser beam and does not interfere with the transmission of the first laser beam. This also applies when beam combining module 322 is configured to transmit the second laser beam and reflect the first laser beam, and further explanation is omitted here.

[0102] It should be understood that in other embodiments, the shape of the beam combining module 322 is not limited.

[0103] In some embodiments, the laser edge cleaning mechanism 32 further includes a first galvanometer 323, disposed in the optical path of the first laser beam to the beam combining module 322. The first galvanometer 323 is configured to cause the first laser beam to scribe the isolation line 201 on the thin film layer along a first predetermined trajectory. The laser edge cleaning mechanism 32 further includes a second galvanometer 324, disposed in the optical path of the second laser beam to the beam combining module 322. The second galvanometer 324 is configured to cause the second laser beam to clear the thin film layer in the clearing area 203 along a second predetermined trajectory. When marking the isolation line 201 on the thin film layer, no external drive mechanism is required to drive the laser edge cleaning mechanism 32. Controlling the first galvanometer 323 allows the first laser beam to scribe the isolation line 201 on the thin film layer, thereby improving marking efficiency. Similarly, when clearing the clearing area 203, no external drive mechanism is required to drive the laser edge cleaning mechanism 32. Controlling the second galvanometer 324 allows the second laser beam to scribe the clearing area 203 along the second predetermined trajectory, thereby improving clearing efficiency.

[0104] In some embodiments, the laser edge cleaning mechanism 32 further includes a first reflector group, which includes at least one first reflector. The first reflector group is disposed on the optical path of the first laser beam toward the beam combining module 322, and is configured to reflect the first laser beam toward the beam combining module 322. Specifically, the first reflector group is disposed between the first laser 3211 and the first galvanometer mirror 323. The first laser beam is emitted by the first laser 3211 and directed toward the first reflector group. The first reflector group reflects the first laser beam, causing it to change its path and then be directed toward the first galvanometer mirror 323. Finally, the first galvanometer mirror 323 is used to direct the first laser beam toward the beam combining module 322. Because the first reflector group can change the path of the first laser beam, when the first laser beam emitted by the first laser 3211 cannot be directed directly toward the first galvanometer mirror 323, the reflection of the first reflector group ensures that the first laser beam is directed toward the first galvanometer mirror 323.

[0105] In one specific embodiment, the first reflector group includes two first reflectors, which work together to ensure that the first laser light emitted by the first laser 3211 is directed toward the first galvanometer mirror 323. It is understood that in other embodiments, there is no limitation on the number of first reflectors included in the first reflector group. For example, the first reflector group may include one first reflector or more than two first reflectors.

[0106] Continuing with Figures 5-7 , the laser edge cleaning mechanism 32 also includes a second reflector assembly 325. The second reflector assembly 325 includes at least one second reflector 3251. The second reflector 3251 is positioned in the optical path of the second laser beam toward the beam combining module 322 to reflect the second laser beam toward the beam combining module 322. Specifically, the second reflector 3251 of the second reflector assembly 325 is positioned between the second laser 3212 and the second galvanometer mirror 324. When the second laser 3212 emits the second laser beam, the second laser beam is directed toward the second reflector assembly 325. The second reflector assembly 325 then reflects the second laser beam, causing it to redirect toward the second galvanometer mirror 324 and ultimately toward the beam combining module 322. Because the second reflector assembly 325 can redirect the second laser beam, if the second laser beam emitted by the second laser 3212 cannot directly reach the second galvanometer mirror 324, the second reflector assembly 325 can ensure that the second laser beam is directed toward the second galvanometer mirror 324.

[0107] In one specific embodiment, the second reflector group 325 includes two second reflectors 3251. The two second reflectors 3251 work together to ensure that the second laser light emitted by the second laser 3212 is directed toward the second galvanometer mirror 324. It is understood that in other embodiments, the number of second reflectors 3251 included in the second reflector group 325 is not limited. For example, the second reflector group 325 may include one second reflector 3251 or more than two second reflectors 3251.

[0108] Referring to FIG8 , another embodiment of the present application further provides an edge clearing method, comprising the steps of:

[0109] S110: turning the product 200 from a state where the film layer faces upward to a state where the film layer faces downward;

[0110] It should be noted that when the product 200 is in the film-layer-upward position, the film layer of the product 200 is located above the substrate; whereas, when the product 200 is in the film-layer-downward position, the film layer of the product 200 is located below the substrate. Specifically, when the product 200 is in the film-layer-upward position, it is loaded onto the conveying mechanism 12 of the loading device 10. The turning mechanism 11 of the loading device 10 drives the conveying mechanism 12 to turn over, thereby turning the product 200 from the film-layer-upward position to the film-layer-downward position.

[0111] S120: Loading the product 200 with the film layer facing downward onto the laser edge cleaning station;

[0112] S130: cleaning the edge portion of the thin film layer of the product 200 in the laser edge cleaning station.

[0113] Specifically, the laser edge cleaning station is provided with a laser edge cleaning device 30 , and the conveying mechanism 12 of the loading device 10 loads the product 200 onto the laser edge cleaning device 30 of the laser edge cleaning station, and the laser edge cleaning device 30 removes the edge portion of the film layer of the product 200 .

[0114] In the edge cleaning method provided in the embodiment of the present application, when cleaning the edge of the product 200, the thin film layer of the product 200 is located below the substrate. In this way, compared with the situation where the thin film layer is located above the substrate during edge cleaning, the dust formed by edge cleaning will naturally fall off under the action of gravity. In conjunction with the dust collection equipment, the dust is prevented from remaining on the substrate, thereby ensuring the dust cleaning effect and further ensuring the overall yield of the product 200.

[0115] In some embodiments, step S130 includes:

[0116] clearing the edge of one end of the film layer in the third direction;

[0117] Simultaneously removing edge portions of both ends of the film layer in the first direction;

[0118] clearing the edge portion of the other end of the film layer in the third direction;

[0119] The first direction intersects the third direction.

[0120] Specifically, one of the laser edge cleaning mechanisms 32 of the laser edge cleaning device 30 is controlled to move in the first direction to clean the edge portion of one end of the thin film layer in the third direction;

[0121] The dragging mechanism 33 of the laser edge cleaning device 30 is controlled to clamp the edge portion of the product 200 and drag the product 200 to move relative to the laser edge cleaning mechanism 32 along the third direction. The two laser edge cleaning mechanisms 32 respectively clean the edge portions of both ends of the film layer in the first direction;

[0122] One of the laser edge cleaning mechanisms 32 is controlled to move along the first direction to clean the edge portion of the other end of the film layer in the third direction.

[0123] In the aforementioned edge cleaning method, since the dragging mechanism 33 clamps the edge of the product 200 while dragging it, the clamped edge of the film layer is eventually removed. The provision of the dragging mechanism 33 does not affect the remaining portion of the film layer. Furthermore, the cooperation of the two laser edge cleaning mechanisms 32 improves the efficiency of edge cleaning.

[0124] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0125] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An edge cleaning system, characterized in that: include: at least one conveying device for conveying a product (200), the conveying device comprising a turnover mechanism (11) and a conveying mechanism (12) for carrying and conveying the product (200), the conveying mechanism (12) being mounted on the turnover mechanism (11), and the turnover mechanism (11) being used to drive the conveying mechanism (12) to flip; A laser edge cleaning device (30), wherein one of the conveying devices is a loading device (10); the flipping mechanism (11) of the loading device (10) can drive the product (200) to flip from a state where the film layer is facing upward to a state where the film layer is facing downward through the conveying mechanism (12); the conveying mechanism (12) of the loading device (10) can load the product (200) in the state where the film layer is facing downward onto the laser edge cleaning device (30); and the laser edge cleaning device (30) is used to clean the edge portion of the film layer of the product (200).

2. The edge cleaning system according to claim 1, characterized in that: The number of the conveying devices is two, and the other conveying device is a feeding device (20); The laser edge cleaning device (30) can feed the product (200) after edge cleaning onto the feeding device (20); the flipping mechanism (11) of the feeding device (20) can drive the product (200) to flip from a state with the film layer facing downward to a state with the film layer facing upward through the conveying mechanism (12); and the conveying mechanism (12) of the feeding device (20) can output the product (200) in the state with the film layer facing upward.

3. The edge cleaning system according to claim 1 or 2, characterized in that: The conveying mechanism (12) is provided with a conveying wheel set (121) at at least one end in the first direction; Each group of the conveying wheel groups (121) comprises two conveying wheels (1211) spaced apart in the second direction and used for carrying the product (200), and the conveying wheel groups (121) are used for conveying the product (200) along a third direction; the first direction, the second direction and the third direction intersect each other.

4. The edge cleaning system according to claim 3, characterized in that: The conveying mechanism (12) is provided with the conveying wheel groups (121) at both ends in the first direction; and at least two groups of the conveying wheel groups (121) are provided at each end of the conveying mechanism (12) along the third direction.

5. The edge cleaning system according to claim 3, characterized in that: The conveying mechanism (12) further comprises a conveying drive assembly (122), the conveying wheel assembly (121) being connected to the conveying drive assembly (122), and the conveying drive assembly (122) being used to drive the conveying wheel (1211) to rotate so as to convey the product (200) along the third direction.

6. The edge cleaning system according to claim 1 or 2, characterized in that: The conveying device further comprises a first guiding mechanism (13), wherein the first guiding mechanism (13) comprises guiding wheels (131) distributed at two ends of the conveying mechanism (12) in a first direction; When the conveying mechanism (12) conveys the product (200), the guide wheels (131) at both ends can abut against the product (200) to guide the product (200) in a third direction in which the conveying mechanism (12) conveys the product (200); the first direction intersects with the third direction.

7. The edge cleaning system according to claim 1 or 2, characterized in that: The conveying device further comprises a clamping mechanism (14), wherein the clamping mechanism (14) is mounted on the conveying mechanism (12); when the turning mechanism (11) drives the conveying mechanism (12) to turn over, the clamping mechanism (14) is used to clamp the product (200) so that the product (200) and the conveying mechanism (12) remain relatively fixed.

8. The edge cleaning system according to claim 7, characterized in that: The clamping mechanism (14) comprises a clamping drive member (141) and a clamping block (142); the clamping block (142) is connected to the clamping drive member (141); and the clamping drive member (141) can drive two clamping parts of the clamping block (142) to move closer or farther away.

9. The edge cleaning system according to claim 1 or 2, characterized in that: The conveying device also includes a mounting seat (15); the flip mechanism (11) includes a flip drive assembly (111), a flip plate (112) and a flip shaft (113); the flip plate (112) is connected to the flip drive assembly (111); the conveying mechanism (12) is installed on the flip plate (112); and the flip plate (112) is connected to the mounting seat (15) via the flip shaft (113); The flip driving assembly (111) can drive the flip plate (112) to rotate relative to the mounting seat (15) via the flip shaft (113), so as to drive the conveying mechanism (12) to flip.

10. The edge cleaning system according to claim 1 or 2, characterized in that: The laser edge cleaning device (30) comprises: A carrying mechanism (31), wherein the conveying mechanism (12) of the loading device (10) is capable of loading the product (200) onto the carrying mechanism (31); A dragging mechanism (33) and a laser edge cleaning mechanism (32) are both mounted on the supporting mechanism (31); the laser edge cleaning mechanism (32) can move relative to the supporting mechanism (31) along a first direction to clean the edges of the product (200); the dragging mechanism (33) is used to clamp the edge portion of the product (200), and can move relative to the supporting mechanism (31) along a third direction to drag the product (200), and the laser edge cleaning mechanism (32) can clean the edges of the product (200) along the third direction; the first direction intersects with the third direction.

11. The edge cleaning system according to claim 10, characterized in that: The laser edge cleaning device (30) comprises two laser edge cleaning mechanisms (32), and the two laser edge cleaning mechanisms (32) are arranged along the first direction; When the dragging mechanism (33) drags the product (200) to move along the third direction, the two laser edge cleaning mechanisms (32) respectively clean the edges of both ends of the product (200) in the first direction.

12. The edge cleaning system according to claim 10, characterized in that: The carrying mechanism (31) comprises a supporting wheel (311) for supporting the edge portion of the product (200) in the first direction; when the dragging mechanism (33) drags the product (200), the supporting wheel (311) rotates relative to the product (200).

13. The edge cleaning system according to claim 10, characterized in that: The laser edge cleaning device (30) further comprises a second guiding mechanism (34), wherein the second guiding mechanism (34) is arranged on the supporting mechanism (31), the dragging mechanism (33) is connected to the supporting mechanism (31) via the second guiding mechanism (34), and the second guiding mechanism (34) is used to guide the dragging mechanism (33) along the third direction.

14. The edge cleaning system according to claim 10, characterized in that: The laser edge cleaning mechanism (32) comprises: A laser emitting module (321), used for emitting a first laser and a second laser; a beam combining module (322), wherein the first laser and the second laser emitted by the laser emitting module (321) can both be emitted toward the beam combining module (322); the beam combining module (322) is used to transmit one of the first laser and the second laser, and to reflect the other of the first laser and the second laser, so that the first laser and the second laser are emitted in parallel; The first laser is used to draw an isolation line (201) on the thin film layer of the product (200) to divide the thin film layer of the product (200) into a clearing area (203) and a retaining area (202), and the second laser is used to clear the clearing area (203).

15. The edge cleaning system according to claim 14, characterized in that: The laser edge cleaning mechanism (32) further comprises a first galvanometer (323), the first galvanometer (323) being arranged on an optical path of the first laser directed toward the beam combining module (322), the first galvanometer (323) being used to enable the first laser to draw the isolation line (201) on the thin film layer along a first preset trajectory.

16. The edge cleaning system according to claim 14 or 15, characterized in that: The laser edge clearing mechanism (32) further comprises a second galvanometer (324), the second galvanometer (324) being arranged on an optical path of the second laser directed toward the beam combining module (322), the second galvanometer (324) being used to enable the second laser to clear the clearing area (203) along a second preset trajectory.

17. The edge cleaning system according to claim 14 or 15, characterized in that: The first laser is green light, and the second laser is red light.

18. The edge cleaning system according to claim 14 or 15, characterized in that: The power of the first laser is smaller than the power of the second laser.

19. A method for edge cleaning, characterized in that: Includes steps: Turning the product (200) from a state where the film layer faces upward to a state where the film layer faces downward; Loading the product (200) with the film layer facing downward to a laser edge cleaning station; The edge portion of the film layer of the product (200) in the laser edge cleaning station is cleaned.

20. The edge cleaning method according to claim 19, characterized in that: The edge of the thin film layer of the product (200) in the laser edge cleaning station is cleaned, comprising the steps of: removing an edge portion of one end of the film layer in the third direction; Simultaneously removing edge portions of both ends of the film layer in the first direction; removing the edge portion of the film layer at the other end of the third direction; Wherein, the first direction intersects with the third direction.

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