Edge sealing and repairing device

Abstract

The invention relates to an edge sealing and repairing device, and relates to the field of photovoltaic manufacturing. According to the technical scheme, the edge sealing and repairing device and a solar cell silicon wafer to be subjected to edge sealing move relatively in the first direction, the edge sealing and repairing device comprises an edge sealing wheel, and an insulating material on the outer side face of the edge sealing wheel makes contact with the side edge portion of the solar cell silicon wafer; the material stopping block is arranged in other areas, which are not in contact with the solar cell silicon wafer, of the edge sealing wheel, and is provided with a material supplying groove for supplying an insulating material; when the edge sealing wheel is in a rotating state, the outer side face of the edge sealing wheel can be evenly coated with the insulating material through the feeding groove. Under the condition, the contact area of the insulating material and the side edge part of the solar cell silicon wafer is greatly increased through the contact type edge sealing, and the conditions of stripping of the insulating material and short circuit caused by liquid leakage during later electroplating are avoided; according to the invention, the defect or microcrack of the side edge part of the solar cell silicon wafer is repaired, and the yield of the solar cell silicon wafer is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photovoltaic manufacturing technology, in particular to an edge sealing repair device. BACKGROUND

[0002] Solar cell silicon wafers are doped with different elements to form N-type and P-type doping to form a cell PN junction, which generates a voltage difference under light and simultaneously generates carriers to achieve power supply to the outside of the cell. To improve the reliability of solar cell silicon wafers, the edges are designed to be insulated, and during the process of forming metal electrodes by electroplating, the edges of the solar cell silicon wafers need to be protected with insulating materials to avoid short circuits caused by metal deposition around the solar cell silicon wafers.

[0003] Further, the concave-convex structure of the side edge of the solar cell silicon wafer is jointly caused by process and functional requirements: wet etching forms a pyramid or groove structure on the edge of the crystal surface silicon wafer with NaOH, HF, etc. due to the anisotropy of silicon crystals; dry etching produces nanoscale rough texture through ion bombardment of plasma. From a functional point of view, this structure can break the surface continuity and reduce the recombination of carriers at the edge; its concave-convex morphology can increase the light scattering path and prolong the propagation distance of light in the silicon wafer, improving light absorption efficiency. However, it is worth noting that the side edge of the solar cell silicon wafer often has defects and micro-cracks, which are mainly caused by mechanical stress during cutting, tool wear or improper parameters causing edge damage, crystal defects or impurities in the silicon wafer material, uneven chemical corrosion or temperature shock stress in subsequent cleaning and etching processes, and mechanical impact or stress concentration during handling and installation, which significantly affect the performance and yield of solar cells.

[0004] In the prior art, a dispensing machine is usually used to dispense and seal the side edge of the solar cell silicon wafer, and for example, CN116417532A discloses an automatic edge sealing device and method for photovoltaic cell wafers, which comprises a wafer carrying platform for linear translation movement of the cell wafers to be sealed, and a coating roller for applying coating material to the side edge of the silicon wafer during rotation of the coating roller to achieve coating and sealing of the side edge.

[0005] However, on one hand, due to the side edge of the solar cell silicon wafer presents as a concave-convex structure, the above prior art can only coat the insulating material on the surface of the side edge of the solar cell silicon wafer by the non-contact coating method, the contact area of the insulating material with the side edge of the solar cell silicon wafer is small, which is easy to cause the insulating material to peel off and the solar cell silicon wafer to short circuit due to the liquid leakage during the later electroplating, and the edge sealing effect is poor; on the other hand, the groove design in the coating rotating wheel of the above prior art can cause a large amount of insulating material to be coated on the upper and lower surfaces of the solar cell silicon wafer, resulting in a large amount of fragments in the subsequent production steps; on the other hand, the existing solar cell silicon wafer edge sealing technology cannot repair the defects or micro-cracks of the side edge of the solar cell silicon wafer under the condition that the edge sealing effect is not ideal. SUMMARY

[0006] The purpose of the present application is to provide an edge sealing and repairing device to solve the problems existing in the prior art.

[0007] To achieve the above purpose, the technical scheme adopted by the present application is as follows: An edge sealing and repairing device for edge sealing and repairing of a solar cell silicon wafer, the edge sealing and repairing device and the solar cell silicon wafer to be edge sealed move relative to each other along a first direction, and the edge sealing and repairing device comprises: an edge sealing wheel, the outer side surface of which is in contact with the side edge portion of the solar cell silicon wafer; and a material blocking block provided in other areas of the edge sealing wheel which do not contact the solar cell silicon wafer, and having a material supply groove for supplying insulating material; wherein when the edge sealing wheel is in a rotating state, the material supply groove can uniformly coat the insulating material on the outer side surface of the edge sealing wheel.

[0008] In a possible implementation, the material supply groove has a return material end and a material outlet end corresponding to the rotating direction of the edge sealing wheel, and the groove width of the material supply groove gradually decreases from the return material end to the material outlet end.

[0009] In a possible implementation, the material supply groove has a material inlet connected to an external material tank for continuously introducing insulating material.

[0010] In a possible implementation, the side edge portion of the solar cell silicon wafer is in tangential contact with the outer side surface of the edge sealing wheel to fill and seal the concave-convex structure of the side edge portion of the solar cell silicon wafer, and to repair the defects or micro-cracks of the side edge portion of the solar cell silicon wafer.

[0011] In a possible implementation, the side edge part of the solar cell silicon wafer is in tangential contact with the insulating material layer on the outer side of the edge sealing wheel, so as to fill the concave-convex structure of the side edge part of the solar cell silicon wafer with sealing and repair the defects or micro-cracks of the side edge part of the solar cell silicon wafer.

[0012] In a possible implementation, the edge sealing wheel and the material blocking block are installed on an edge sealing seat, and the edge sealing wheel is rotatably installed on the edge sealing seat through a rotating shaft and a bearing. The material blocking block is connected with the first waist hole at the top of the edge sealing seat through a bolt, and the setting direction of the first waist hole is perpendicular to the first direction.

[0013] In a possible implementation, the solar cell silicon wafer is placed on a sliding platform, and the sliding platform is slidingly connected to a sliding guide rail arranged in the first direction.

[0014] In a possible implementation, the sliding guide rail and the edge sealing seat are both installed on a bottom plate, and the edge sealing seat is connected with the bottom plate through a second waist hole at the bottom of the edge sealing seat and a bolt, and the setting direction of the second waist hole is perpendicular to the first direction.

[0015] In a possible implementation, the solar cell silicon wafer is located in the first direction, and the two opposite side edge parts are respectively matched with a row of edge sealing and repairing devices, so as to simultaneously seal and repair the two opposite side edge parts of the solar cell silicon wafer in the first direction. In a possible implementation, the thickness of the edge sealing wheel is greater than the thickness of the solar cell silicon wafer, and the solar cell silicon wafer and the edge sealing wheel are in the same horizontal plane.

[0016] In a possible implementation, the insulating material at least includes UV glue, and the edge sealing wheel at least includes a silica gel edge sealing wheel.

[0017] The technical scheme provided by the application has at least the following beneficial effects: The edge sealing repair device and the solar cell silicon wafer to be edge sealed move along a first direction, the edge sealing repair device comprises an edge sealing wheel, an insulating material on the outer side of the edge sealing wheel contacts with the side edge part of the solar cell silicon wafer, and a material blocking block is arranged on the other area of the edge sealing wheel which does not contact the solar cell silicon wafer, and the material blocking block has a material supply groove for supplying the insulating material; wherein when the edge sealing wheel is in a rotating state, the material supply groove can uniformly coat the insulating material on the outer side of the edge sealing wheel. In this case, on the one hand, the concave-convex structure of the side edge part of the solar cell silicon wafer is filled and sealed by the insulating material through the contact type edge sealing, the contact area of the insulating material with the side edge part of the solar cell silicon wafer is greatly improved, the peeling of the insulating material and the short circuit of the solar cell silicon wafer caused by liquid leakage during later electroplating are avoided, and the edge sealing effect is good; on the other hand, the defects or micro-cracks of the side edge part of the solar cell silicon wafer are repaired, the performance and yield of the solar cell silicon wafer are improved, and the risk of broken pieces is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the application, and constitute a part of the specification, illustrate the application, and are used to explain the application together with the embodiments of the application, and do not constitute a limitation on the application.

[0019] Figure 1 An overall adaptation structure schematic diagram of the edge sealing repair device and the solar cell silicon wafer provided by an exemplary embodiment of the application is shown.

[0020] Figure 2 A local adaptation structure schematic diagram of the edge sealing repair device and the solar cell silicon wafer provided by an exemplary embodiment of the application is shown.

[0021] Figure 3 A structure schematic diagram of the edge sealing repair device provided by an exemplary embodiment of the application is shown.

[0022] Figure 4 A structure schematic diagram of a first material blocking block of the edge sealing repair device provided by an exemplary embodiment of the application is shown.

[0023] Figure 5 A structure schematic diagram of a second material blocking block of the edge sealing repair device provided by an exemplary embodiment of the application is shown.

[0024] Figure 6 A structure schematic diagram of the side edge part of the solar cell silicon wafer provided by an exemplary embodiment of the application is shown.

[0025] Figure 7 An effect schematic diagram of the side edge part of the solar cell silicon wafer after being coated by the prior art non-contact coating provided by an exemplary embodiment of the application is shown.

[0026] Figure 8 An effect schematic diagram of the side edge part of the solar cell silicon wafer after the contact coating according to the technical solution is shown.

[0027] In the figure: 1, solar cell silicon wafer; 11, side edge part; 2, edge sealing repairing device; 21, edge sealing wheel; 22, material blocking block; 221, feeding groove; 2211, feeding port; 2212, material returning end; 2213, material discharging end; 23, edge sealing seat; 3, sliding platform; 4, sliding guide rail; 5, bottom plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0029] Wherein, the same parts are denoted by the same reference numerals. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings of the present application specification, and the words "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from a particular part. In addition, the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include one or more features. In the description of the present application specification, the meaning of "multiple" is two or more.

[0030] The present application will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] Figure 1 An effect schematic diagram of the side edge part of the solar cell silicon wafer after the contact coating according to the technical solution is shown. Figure 2An exemplary embodiment of the edge repairing device is shown in the figure. The edge repairing device 2 is used for edge repairing of a solar cell silicon wafer 1. The edge repairing device 2 and the solar cell silicon wafer 1 to be edge repaired move in a first direction. The edge repairing device 2 includes an edge wheel 21, the outer side of which is in contact with the side edge 11 of the solar cell silicon wafer 1, and a material blocking block 22, which is arranged on the edge wheel 21 and does not contact the solar cell silicon wafer 1, and has a material supply groove 221 for supplying insulation material. When the edge wheel 21 is in a rotating state, the material supply groove 221 can uniformly coat the insulation material on the outer side of the edge wheel 21.

[0032] In detail, referring to Figure 1 and Figure 2 In some embodiments, the solar cell silicon wafer 1 to be edge repaired moves in a first direction, and the side edge 11 of the solar cell silicon wafer 1 in the first direction is in tangential contact with the outer side of the edge wheel 21. When the solar cell silicon wafer 1 advances, the friction between the side edge 11 of the solar cell silicon wafer 1 and the edge wheel 21 drives the edge wheel 21 to rotate around the axis, and the contact point between the two is always dynamically fitted. During the contact transmission process, the moving direction of the solar cell silicon wafer 1 and the rotating direction of the edge wheel 21 are coordinated, so that the edge wheel 21 continuously rotates with the solar cell silicon wafer 1 advancing, ensuring the continuity and uniformity of the insulation material application in the edge repairing process.

[0033] Optionally, when the solar cell silicon wafer 1 is in tangential contact with the outer side of the edge wheel 21, the edge wheel 21 is driven to rotate by a driving member (not shown, including but not limited to a driving motor). The rotating direction of the edge wheel 21 can be the same as or opposite to the moving direction of the solar cell silicon wafer 1. Further, the linear speed of the rotating edge wheel 21 can be the same as or different from the linear speed of the moving solar cell silicon wafer 1.

[0034] In the above-mentioned embodiment in which the side edge 11 of the solar cell silicon wafer 1 in the first direction is in tangential contact with the outer side of the edge wheel 21, when the edge wheel 21 is driven to rotate by the side edge 11 of the solar cell silicon wafer 1, the rotating and discharging operation state is entered. The insulation material previously attached to the outer side of the edge wheel 21 is uniformly applied to the side edge 11 of the solar cell silicon wafer 1 due to the contact and extrusion of the side edge 11 of the solar cell silicon wafer 1 during the rotating process. The concave-convex structure, defects or micro-cracks existing in the side edge 11 of the solar cell silicon wafer 1 are all filled and repaired by the insulation material, achieving seamless coverage and sealing from the concave part to the convex part, so that the insulation material is closely fitted with the side edge 11 of the solar cell silicon wafer 1, ensuring the edge repairing and repairing effect.

[0035] In some embodiments, the solar cell silicon wafer 1 to be edge-sealed is moved along a first direction, and the side edge portion 11 of the solar cell silicon wafer 1 in the first direction is in tangential contact with an insulating material layer (not shown in the figure) on the outer side surface of the edge-sealing wheel 21.

[0036] In the above-mentioned embodiments in which the side edge portion 11 of the solar cell silicon wafer 1 in the first direction is in tangential contact with the insulating material layer on the outer side surface of the edge-sealing wheel 21, the edge-sealing wheel 21 is driven to rotate by a driving member (not shown, including but not limited to a driving motor), and then enters a rotating discharging operation state. The insulating material previously attached to the outer side of the edge-sealing wheel 21 is extruded and uniformly applied to the side edge portion 11 of the solar cell silicon wafer 1 in the process of rotation. The concave-convex structure, as well as defects or micro-cracks, present in the side edge portion 11 of the solar cell silicon wafer 1 are all filled and repaired by the insulating material, achieving seamless coverage and sealing from the concave portion to the convex portion, so that the insulating material is closely attached to the side edge portion 11 of the solar cell silicon wafer 1, ensuring the edge-sealing and repairing effects.

[0037] In particular, Figure 6 A structural schematic diagram of the side edge portion of the solar cell silicon wafer provided by an exemplary embodiment of the present application is shown, and the side edge portion 11 of the solar cell silicon wafer 1 has a concave-convex structure, as well as defects or micro-cracks. Figure 7 An effect schematic diagram of the side edge portion of the solar cell silicon wafer after non-contact coating by the prior art is shown, and it can be seen that the non-contact coating cannot coat the insulating material to the bottom of the side edge portion 11 of the solar cell silicon wafer 1, and repeated non-contact coating cannot coat the insulating material to the bottom of the side edge portion 11 of the solar cell silicon wafer 1. Figure 8 An effect schematic diagram of the side edge portion of the solar cell silicon wafer after contact coating by the present technical solution is shown, and it can be seen that the concave-convex structure, as well as defects or micro-cracks, present in the side edge portion 11 of the solar cell silicon wafer 1 are all filled and repaired by the insulating material, achieving seamless coverage and sealing from the concave portion to the convex portion.

[0038] Further, referring to Figure 2 , Figure 3 and Figure 4 , the feeding groove 221 has a feeding port 2211 connected to an external tank for continuously introducing the insulating material. The feeding groove 221 has a return end 2212 and a discharging end 2213 corresponding to the rotating direction of the edge-sealing wheel 21, the groove width of the feeding groove 221 from the return end 2212 to the discharging end 2213 gradually decreases, and the thickness of the insulating material on the edge-sealing wheel 21 can be controlled by adjusting the distance between the groove bottom surface of the discharging end 2213 of the feeding groove 221 and the side surface of the edge-sealing wheel 21.

[0039] Optionally, referring to Figure 5 , similarly, the external tank guides the insulation material into the feeding port 2211 of the feeding groove 221 through a conduit, the width of the feeding groove 221 gradually decreases from the return end 2212 to the discharge end 2213, and the thickness of the insulation material on the sealing wheel 21 can be controlled by adjusting the distance between the bottom surface of the discharge end 2213 of the feeding groove 221 and the side surface of the sealing wheel 21. In this alternative, the structure has a small size and occupies a small space, which facilitates the layout of the entire line; the thickness and uniformity of the insulation material layer can be adjusted by rotation; the sealing wheel can be easily disassembled and cleaned, and the insulation material remaining on the sealing wheel can be easily cleaned after disassembly; the U-shaped notch (i.e., the feeding port 2211) on the part can correctly position the injection position.

[0040] In the embodiments of the present application, the sealing wheel 21 rotates and passes through the feeding groove 221 of the blocking block 22, thereby continuously supplying the insulation material to the sealing wheel 21. The external tank communicates with the feeding port 2211 of the feeding groove 221 through a conduit and guides the insulation material into the feeding groove 221. The width of the feeding groove 221 gradually decreases from the return end 2212 to the discharge end 2213, forming a gradual change structure. By adjusting the distance between the bottom surface of the discharge end 2213 and the side surface of the sealing wheel 21, the thickness of the insulation material attached to the surface of the sealing wheel 21 can be accurately controlled, so that the amount of insulation material coated on the side edge part 11 of the solar cell silicon wafer 1 can be further accurately controlled.

[0041] In some embodiments, referring to Figure 1 , the solar cell silicon wafer 1 is located in the first direction, and each of the two opposite side edge parts 11 is adapted to a row of sealing repair devices 2, so as to simultaneously seal and repair the two opposite side edge parts 11 of the solar cell silicon wafer 1 in the first direction.

[0042] In the embodiments of the present application, the number of each row of sealing repair devices 2 and the moving speed of the solar cell silicon wafer 1 are flexibly adjusted according to the actual working conditions and the model of the solar cell silicon wafer 1. Preferably, the number of each row of sealing repair devices 2 is more than one.

[0043] Further, after the sealing and repair of the two opposite side edge parts 11 of the solar cell silicon wafer 1 in the first direction are completed, the solar cell silicon wafer 1 is rotated by 90°, so as to seal and repair the remaining two opposite side edge parts 11 of the solar cell silicon wafer 1. After the sealing and repair of the four side edge parts 11 of the solar cell silicon wafer 1 are completed, the photocuring treatment is performed.

[0044] In the embodiments of the present application, the light curing process can utilize the photosensitive property of the insulating material such as UV glue to make the edge sealing layer quickly solidify and shape, and improve the adhesion of the insulating material to the side edge portion 11 of the solar cell silicon wafer 1. After solidification, the edge sealing layer forms a dense protective layer, which can effectively prevent the electroplating solution from penetrating into the concave-convex structure of the side edge portion 11 of the solar cell silicon wafer 1 in the later stage, thereby eliminating the short circuit risk from the process end.

[0045] In some embodiments, the insulating material includes but is not limited to UV glue. The edge sealing wheel 21 includes but is not limited to a silica gel edge sealing wheel.

[0046] In the embodiments of the present application, in addition to UV glue, the insulating material can also be selected from epoxy resin glue and organic silicon sealant. In addition to silica gel material, the edge sealing wheel 21 can also be selected from a polyurethane edge sealing wheel and a rubber edge sealing wheel.

[0047] In some embodiments, referring to Figure 2 , Figure 3 and Figure 4 , the material blocking block 22 and the edge sealing wheel 21 are installed on the edge sealing seat 23 of the edge sealing and repairing device 2, and the edge sealing wheel 21 is rotatably installed on the edge sealing seat 23 through a rotating shaft and a bearing. The material blocking block 22 is connected to the first waist hole at the top of the edge sealing seat through a bolt, and the setting direction of the first waist hole is perpendicular to the first direction, so as to adjust the distance between the groove bottom surface of the material feeding groove 221 at the discharge end 2213 and the side surface of the edge sealing wheel 21.

[0048] In the embodiments of the present application, the material blocking block 22 and the edge sealing wheel 21 are installed on the edge sealing seat 23, and the edge sealing wheel 21 is rotatably fixed through a rotating shaft and a bearing. This installation mode can ensure that the edge sealing wheel 21 can rotate flexibly when the solar cell silicon wafer 1 moves. The material blocking block 22 is connected to the first waist hole at the top of the edge sealing seat 23 through a bolt. Since the setting direction of the first waist hole is perpendicular to the first direction in which the solar cell silicon wafer 1 moves, the distance between the groove bottom surface of the material feeding groove 221 at the discharge end 2213 and the side surface of the edge sealing wheel 21 can be changed by adjusting the bolt, so as to accurately control the thickness of the insulating material on the edge sealing wheel 21. The thickness of the insulating material can be flexibly adjusted according to different silicon wafer specifications or process requirements, so as to ensure uniform application of the insulating material, and prevent excessive accumulation or insufficient application of the insulating material.

[0049] In some embodiments, referring to Figure 1 , the solar cell silicon wafer 1 is placed on the sliding platform 3, and the sliding platform 3 is slidingly connected to the sliding guide rail 4 arranged along the first direction. The sliding guide rail 4 and the edge sealing seat 23 are both installed on the bottom plate 5, and the edge sealing seat 23 is connected to the bottom plate 5 through the second waist hole at the bottom thereof and a bolt. The setting direction of the second waist hole is perpendicular to the first direction, so as to adjust the distance between the side edge portion 11 of the solar cell silicon wafer 1 in the first direction and the edge sealing wheel 21.

[0050] In the embodiment of the present application, the solar cell silicon wafer 1 is placed on the sliding platform 3 and moves smoothly along the first direction through the sliding guide rail 4, which can ensure the uniform and straight motion of the silicon wafer during the edge sealing process, realize the stable discharging and uniform edge sealing of the edge sealing wheel 21. The edge sealing seat 23 is connected with the bottom plate 5 through the second waist hole perpendicular to the first direction and the bolt at the bottom, so that the operator can flexibly adjust the position of the edge sealing seat 23, and then control the tangential contact between the side edge part 11 of the solar cell silicon wafer 1 and the outer side of the edge sealing wheel 21 or the insulating material layer outside the edge sealing wheel 21, so as to ensure that the insulating material can be uniformly applied to the side edge of the silicon wafer.

[0051] It is worth mentioning that, referring to Figure 2 , the thickness of the edge sealing wheel 21 is greater than the thickness of the solar cell silicon wafer 1, and the solar cell silicon wafer 1 and the edge sealing wheel 21 are in the same horizontal plane.

[0052] In the embodiment of the present application, the thickness of the edge sealing wheel 21 is greater than the solar cell silicon wafer 1, which can ensure that the side edge completely covers the side edge part 11 of the solar cell silicon wafer 1 when it rotates; the two are in the same horizontal plane, which ensures that the solar cell silicon wafer 1 and the edge sealing wheel 21 always maintain parallel and fit in dynamic contact, which not only avoids the mechanical stress caused by the height difference from causing the solar cell silicon wafer 1 to be damaged, but also allows the insulating material to be uniformly stressed when being extruded and filled, and ensures that the concave-convex structure of the side edge part 11 of the solar cell silicon wafer 1 is completely covered.

[0053] Next, the working principle of the edge sealing and repairing device involved in the present application is described.

[0054] The solar cell silicon wafer 1 to be sealed and the edge sealing wheel 21 move relative to each other along the first direction; When the edge sealing wheel 21 is in a rotating state, the insulating material is uniformly coated on the outer side of the edge sealing wheel 21 under the action of the material blocking block 22; When the solar cell silicon wafer 1 contacts the insulating material layer outside the edge sealing wheel 21; or When the solar cell silicon wafer 1 directly contacts the outer side of the edge sealing wheel 21; The insulating material is coated on the side edge part 11 of the solar cell silicon wafer 1 to fill and seal the concave-convex structure of the side edge part 11 of the solar cell silicon wafer 1, and repair the defects or micro-cracks of the side edge part 11 of the solar cell silicon wafer 1.

[0055] In summary, the technical scheme is provided with an edge sealing wheel which moves along a first direction relative to the solar cell silicon wafer to be edge sealed, and the insulating material on the outer side of the edge sealing wheel is in contact with the side edge of the solar cell silicon wafer; and a material blocking block which is provided on the other area of the edge sealing wheel not in contact with the solar cell silicon wafer, and has a material supply groove for supplying the insulating material; wherein when the edge sealing wheel is in a rotating state, the material supply groove can uniformly coat the insulating material on the outer side of the edge sealing wheel. In this case, on the one hand, the concave-convex structure of the side edge of the solar cell silicon wafer is filled and sealed by the contact type edge sealing, the contact area of the insulating material with the side edge of the solar cell silicon wafer is greatly improved, the peeling of the insulating material and the short circuit of the solar cell silicon wafer caused by the liquid leakage during the later electroplating are avoided, and the edge sealing effect is good; on the other hand, the defects or micro-cracks of the side edge of the solar cell silicon wafer are repaired, the performance and yield of the solar cell silicon wafer are improved, and the risk of broken pieces is effectively reduced.

[0056] In the embodiments disclosed in the present application, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense. For example, "connecting" can be fixedly connected, or detachably connected, or integrally connected; "connecting" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments disclosed in the present application can be understood according to the specific circumstances.

[0057] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. An edge-sealing repair device for edge-sealing repair of solar cell silicon wafers (1), characterized in that, The edge sealing and repair device (2) moves relative to the solar cell silicon wafer (1) to be sealed along a first direction. The edge sealing and repair device (2) includes: The sealing wheel (21) has an insulating material on its outer surface that contacts the side edge (11) of the solar cell silicon wafer (1); and A baffle block (22), which is located in other areas where the sealing wheel (21) does not contact the solar cell silicon wafer (1), has a feeding groove (221) for supplying insulating material. When the sealing wheel (21) is rotating, the feeding groove (221) can evenly coat the insulating material on the outer surface of the sealing wheel (21).

2. The edge sealing and repair device according to claim 1, characterized in that, The feeding groove (221) is formed with a return end (2212) and a discharge end (2213) corresponding to the rotation direction of the sealing wheel (21). The width of the groove from the return end (2212) to the discharge end (2213) of the feeding groove (221) decreases from large to small.

3. The edge sealing and repair device according to claim 1, characterized in that, The feeding groove (221) has a feed inlet (2211) that communicates with an external material tank for continuously introducing insulating material.

4. The edge sealing and repair device according to claim 1, characterized in that, The side portion (11) of the solar cell silicon wafer (1) forms a tangential contact with the outer surface of the sealing wheel (21) to fill and seal the uneven structure of the side portion (11) of the solar cell silicon wafer (1) and repair the defects or microcracks of the side portion (11) of the solar cell silicon wafer (1).

5. The edge sealing and repair device according to claim 1, characterized in that, The side portion (11) of the solar cell silicon wafer (1) forms a tangential contact with the insulating material layer on the outer side of the sealing wheel (21) to fill and seal the uneven structure of the side portion (11) of the solar cell silicon wafer (1) and repair the defects or microcracks of the side portion (11) of the solar cell silicon wafer (1).

6. The edge sealing and repair device according to claim 1, characterized in that, The edge sealing wheel (21) and the stop block (22) are mounted on the edge sealing seat (23). The edge sealing wheel (21) is rotatably mounted on the edge sealing seat (23) through a rotating shaft and bearing. The baffle block (22) is connected to the first waist hole at the top of the sealing seat (23) by bolts, and the setting direction of the first waist hole is perpendicular to the first direction.

7. The edge sealing and repair device according to claim 6, characterized in that, The solar cell silicon wafer (1) is placed on a sliding platform (3), which is slidably connected to a sliding guide rail (4) arranged along a first direction.

8. The edge sealing and repair device according to claim 7, characterized in that, The sliding guide rail (4) and the edge sealing seat (23) are both installed on the base plate (5). The edge sealing seat (23) is connected to the base plate (5) through the second waist hole at its bottom and bolts. The setting direction of the second waist hole is perpendicular to the first direction.

9. The edge sealing and repair device according to any one of claims 1 to 8, characterized in that, The solar cell silicon wafer (1) is fitted with a row of edge sealing and repair devices (2) on two opposite sides (11) in the first direction, so as to simultaneously seal and repair the two opposite sides (11) of the solar cell silicon wafer (1) in the first direction. The thickness of the sealing wheel (21) is greater than the thickness of the solar cell silicon wafer (1), and the solar cell silicon wafer (1) and the sealing wheel (21) are on the same horizontal plane.

10. The edge sealing and repair device according to any one of claims 1 to 8, characterized in that, The insulating material includes at least UV adhesive; the sealing wheel (21) includes at least a silicone sealing wheel.

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