Slide glass device for solar cell edge processing
By designing a slide device, using the structure of the side baffle and the fixed end plate, the limiting groove and the shading edge supporting the cell are formed, and the problems of low edge efficiency and risk of fragmentation of the solar cell are solved by wet treatment, achieving more efficient cell processing and higher yield.
Patent Information
- Application Number
- CN202422108537.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-29
AI Technical Summary
The existing methods of wet processing solar cell edges are inefficient and prone to fragmentation of the cell, affecting the processing effect and yield rate.
A slide device is designed, including a side baffle and a fixed end plate arranged in parallel. A partition is provided on the inner side of the side baffle to form a limit groove, and a shading edge is provided at the lower end to support the battery cell, improving space utilization and processing efficiency, and avoiding the risk of fixture crushing.
Through this slide device, the yield rate of the battery cell can be improved, the space utilization rate and processing efficiency can be improved, the risk of battery cell fragmentation can be avoided, and the passivation treatment at the edge of the battery cell can be more thorough.
Smart Images
Figure CN222980470U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of solar cell manufacturing, and particularly relates to a carrier device for edge treatment of solar cell wafers. Background Technique
[0002] In the photovoltaic industry, it is a very common application method to cut a whole piece of battery into small pieces and then integrate them into a module. The ribbon overlapping connection and half-cell connection of solar cells can reduce the series power consumption between cells. Currently, half-cell modules have been mass-produced, and overlapping modules can improve the battery layout density and increase the output power, and are also gradually developing. The commonly used battery cutting and separation methods usually adopt the laser scribing mechanical cutting (LSMC) process or the thermal laser separation (TLS, the abbreviation of Thermal Laser Separation) process. However, no matter which process, a new unpassivated area will be generated on the cutting surface at the edge of the battery, which makes the carrier recombination on the surface of the battery wafer edge more serious. In particular, for more efficient batteries such as the mainstream TOPCon and HJT (the abbreviation of Heterojunction with Intrinsic Thinfilm) in the market, the power loss caused by the recombination at the edge of the battery wafer will be greater. Therefore, passivating the cutting edge of the battery wafer and reducing the carrier recombination at the edge of the battery wafer are also important means to improve the battery performance.
[0003] Currently, the battery wafer edge treatment methods include two types: dry method and wet method. The dry method is to deposit a layer of aluminum oxide passivation film layer on the cutting edge by using an ALD device; the wet method needs to clamp the battery wafer with a fixture and then locally immerse the edge of the battery wafer into a passivation solution or an alkaline etching solution. This method of clamping and treating with a fixture has the following defects: (1) Only a single battery wafer can be clamped by the fixture, and there will be a certain distance between the battery wafers, resulting in low space utilization and low processing efficiency; (2) When the battery wafer is clamped by the fixture, the battery wafer is easily broken due to mechanical stress, and the risk of fragmentation is high. Summary of the Utility Model
[0004] The embodiment of the utility model provides a carrier device for edge treatment of solar cell wafers, aiming to solve the problems of low efficiency of passivation edge treatment and high risk of fragmentation in wet treatment.
[0005] To achieve the above object, the technical solution adopted by the utility model is: to provide a carrier device for edge treatment of solar cell wafers, including:
[0006] Two parallel side baffles, at least one of the inner sides of the side baffles is provided with partitions at uniform intervals, and a limiting groove for limiting the battery cells is formed between two adjacent partitions; the lower edges of the two side baffles are provided with shielding edges bent towards each other, and the angle formed by the shielding edge and the side baffle is an obtuse angle; and
[0007] Two parallel fixed end plates are respectively fixed at both ends of the two side baffles; after the fixed end plates are connected to the side baffles, a quadrilateral box body with open upper and lower ends is formed.
[0008] In an implementable manner, the inner sides of the two side baffles are provided with corresponding partitions, the partitions are fixed on the side baffles in a fin shape, and the height h of the partitions in the vertical direction is less than the height H of the battery cells.
[0009] In an implementable manner, the height h of the partitions is 1 / 4 - 1 / 2 of the height H of the battery cells.
[0010] In an implementable manner, first relief chamfers are provided on both sides of the upper edge of the partition.
[0011] In an implementable manner, second relief chamfers are provided at the upper and lower corners of the partition away from the side baffle.
[0012] In an implementable manner, the partition is arranged at the lower end or the middle of the side baffle.
[0013] In an implementable manner, the angle a formed by the shielding edge and the side baffle is 100° - 120°.
[0014] In an implementable manner, the width M of the shielding edge is 5 - 8 mm.
[0015] In an implementable manner, a reinforcing plate is provided on the outer side of the shielding edge, and the reinforcing plate extends upward to the outer side of the side baffle.
[0016] In an implementable manner, the corresponding reinforcing plates on the two shielding edges are connected by a reinforcing rod to form a trapezoidal reinforcing structure.
[0017] The wafer carrier device for edge treatment of solar cells provided by the present utility model has the following beneficial effects compared with the prior art: A quadrilateral box body with open upper and lower ends is formed by connecting side baffles and fixed end plates. The open upper end facilitates the insertion of solar cells into the quadrilateral box body, and the open lower end facilitates the immersion of silicon wafers into the liquid. Limiting grooves are formed between the partitions on the inner side of the side baffles to limit the solar cells and keep them neatly arranged. The shielding edge at the lower end of the side baffle supports the solar cells. For such a wafer carrier device, the fixture can be removed only by inserting the solar cell between the partitions. Due to the spacing effect of the partitions and the support of the shielding edge, not only can the number of solar cells accommodated in the box body be increased, the space utilization rate and the one-time processing efficiency be improved, but also the risk of the fixture crushing the fragments of the solar cells can be avoided, thereby improving the yield rate of the solar cells. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 FIG. is a schematic perspective view of the wafer carrier device for edge treatment of solar cells provided by an embodiment of the present utility model Figure 1 ;
[0019] Figure 2 is Figure 1 a schematic side view of the wafer carrier device for edge treatment of solar cells provided by the embodiment;
[0020] Figure 3 FIG. is a schematic side view of the wafer carrier device for edge treatment of solar cells provided by an embodiment of the present utility model Figure 2 ;
[0021] Figure 4 FIG. is a schematic side view of the wafer carrier device for edge treatment of solar cells provided by an embodiment of the present utility model Figure 3 ;
[0022] Figure 5 is Figure 3 and Figure 4 a schematic front view of the wafer carrier device for edge treatment of solar cells provided by the embodiment;
[0023] DESCRIPTION OF REFERENCE NUMERALS:
[0024] 1, fixed end plate; 2, solar cell; 3, shielding edge; 4, liquid level line; 5, cleaning tank; 6, partition; 61, second relief chamfer; 7, reinforcing plate; 8, lifting lug; 9, reinforcing rod; 10, side baffle. DETAILED DESCRIPTION
[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0026] Please refer to Figures 1 to 5 , and now a carrier device for edge treatment of solar cells provided by the present utility model will be described. The carrier device for edge treatment of solar cells includes: two side baffles 10 arranged in parallel and two fixed end plates 1 arranged in parallel. At least one inner side surface of the side baffle 10 is provided with partitions 6 at uniform intervals, and a limiting groove for limiting the solar cell 2 is formed between two adjacent partitions 6; the lower edges of the two side baffles 10 are provided with shielding edges 3 bent towards each other, and the included angle formed by the shielding edge 3 and the side baffle 10 is an obtuse angle; the two fixed end plates 1 arranged in parallel are respectively fixed at both ends of the two side baffles 10; after the fixed end plate 1 is connected to the side baffle 10, a quadrilateral box body with open upper and lower ends is formed.
[0027] The carrier device for edge treatment of the solar cell 2 provided by the present utility model forms a quadrilateral box body with open upper and lower ends after the side baffle 10 and the fixed end plate 1 are connected. The open upper end facilitates putting the solar cell 2 into the quadrilateral box body, and the open lower end facilitates the silicon wafer to be immersed in the liquid; the limiting grooves are formed between the partitions 6 on the inner side of the side baffle 10 to limit the solar cell 2 and keep the solar cells 2 neatly arranged; and the shielding edge 3 at the lower end of the side baffle 10 supports the solar cell 2. For this kind of carrier device, the jig only needs to insert the solar cell 2 between the partitions 6 and then the jig can be removed. And due to the spacing effect of the partitions 6 and the support of the shielding edge 3, it can not only increase the number of solar cells 2 accommodated in the box body, improve the space utilization rate and the one-time processing efficiency, but also avoid the risk of the jig crushing the fragments of the solar cell 2, thereby improving the yield of the solar cell 2.
[0028] Different from using a hanging basket with a grid bottom to carry the solar cell 2, in this application, the shielding edge 3 is used to support the solar cell 2, and an acute angle is formed between the shielding edge 3 and the cutting surface of the solar cell 2. Therefore, the shielding edge 3 does not block the cutting surface of the solar cell 2, so that the passivation treatment of the cutting surface of the solar cell 2 can be more thorough, without omission or corners, and further reduces the problem of carrier recombination of the solar cell 2.
[0029] In this application, the side baffle 10, the fixed end plate 1 and the shielding edge 3 can be made of acid and alkali resistant PVDF, PP, PE, PVC, PTFE or PEEK and other materials, or can also be made of corrosion resistant metal materials, such as stainless steel and nickel-based corrosion resistant alloys. Among them, the shielding edge 3 and the side baffle 10 are of an integrally formed structure to ensure the connection strength between the two and the support strength of the shielding edge.
[0030] The term explanations are as follows:
[0031] PVC: It is the abbreviation of PolyVinylChloride, and the Chinese name is polyvinyl chloride.
[0032] PVDF: Poly(vinylidene fluoride), with the English abbreviation PVDF, mainly refers to the homopolymer of vinylidene fluoride (VDF) or the copolymer of VDF and a small amount of fluorinated vinyl monomers, with a fluorine content of about 60%.
[0033] PTFE: Also known as Teflon or Polytetrafluoroethylene, is a high molecular polymer formed by the polymerization of tetrafluoroethylene monomers.
[0034] PEEK (Polyetheretherketone): is a special engineering plastic with excellent properties such as high temperature resistance, self-lubrication, easy processing, and high mechanical strength.
[0035] Polyethylene (abbreviated as PE): is a thermoplastic resin obtained by the polymerization reaction of ethylene monomers.
[0036] PP: The Chinese name is polypropylene, a non-toxic, odorless, tasteless, milky white, highly crystalline polymer.
[0037] In some embodiments, referring to Figure 1 as shown, partition plates 6 corresponding to each other are arranged on the inner sides of two side baffles 10. The partition plates 6 are fixed to the side baffles 10 in a fin shape. The height of the partition plates 6 in the vertical direction is less than the height of the battery cells 2. The partition plates 6 are responsible for spacing and positioning the battery cells 2. It does not require too high a height and can also achieve the separation and positioning of the battery cells 2; the opposite sides of the battery cells 2 are simultaneously limited by the partition plates 6 on both sides, thereby ensuring that the battery cells 2 will not tilt and collide with each other, avoiding the phenomenon of fragmentation.
[0038] In some embodiments, referring to Figure 1 as shown, the height h of the partition plate 6 is 1 / 4 - 1 / 2 of the height H of the battery cell 2.
[0039] In some embodiments, first relief chamfers (not marked in the figure) are arranged on both sides of the upper edge of the partition plate 6. When the battery cell 2 is inserted between the partition plates 6, the first relief chamfers can avoid the risk of fragmentation caused by hard collision between the battery cell 2 and the partition plate 6, and also have the effect of guiding the battery cell 2 to be inserted between the partition plates 6.
[0040] In some embodiments, referring to Figure 3 as shown, second relief chamfers 61 are arranged at the upper and lower corners of the partition plate 6 far from the side baffle 10. The relief chamfer at the lower corner can reduce the shielding of the battery cell 2, so that the battery cell 2 can be fully contacted with the cleaning liquid; the relief chamfer at the upper corner can also avoid the risk of fragmentation caused by hard collision of the battery cell 2.
[0041] In some embodiments, referring to Figure 1 、 Figure 3 andFigure 4 The partition plate 6 can be optionally arranged at the lower end or the middle part of the side baffle 10. Since the partition plate 6 protrudes on the inner side surface of the side baffle 10, the bottom of the battery cell 2 still forms a point contact with the shielding edge 3, so that the phenomenon of omission of the passivation treatment of the bottom cutting surface of the battery cell 2 will not occur.
[0042] In some embodiments, as shown in Figure 2 the included angle a formed by the shielding edge 3 and the side baffle 10 is 100°-120°. The shielding edge is below the device and serves to support the battery cell 2 and prevent the battery cell 2 from slipping. The angle between the shielding edge and the battery cutting surface is 10° to 30°; the design of the inclination angle of the shielding edge 3 can prevent the risk that the shielding edge 3 contacts the battery cell 2 and affects the passivation effect.
[0043] In some embodiments, as shown in Figure 2 the width M of the shielding edge 3 is 5-8 mm. An open bottom of a quadrilateral box body is formed between the two shielding edges 3. The width of the shielding edge 3 should not be too large to ensure sufficient contact between the bottom of the battery cell 2 and the cleaning liquid, otherwise it may affect the treatment effect of the passivation edge at the bottom of the battery cell 2.
[0044] In some embodiments, as shown in Figures 3 to 5 a reinforcing plate 7 is arranged on the outer side surface of the shielding edge 3, and the reinforcing plate 7 extends upward to the outer side surface of the side baffle 10. The purpose of this embodiment is to improve the support strength of the shielding edge 3. Since the width of the shielding edge 3 cannot be too large, but the shielding edge 3 needs to support a lot of battery cells 2 and also requires relatively strong support strength.
[0045] Furthermore, as shown in Figure 5 two or more reinforcing plates 7 are arranged at intervals along the length direction of the shielding edge 3 or the arrangement direction of the battery cells 2, and the height of the reinforcing plate 7 protruding from the shielding edge 3 is 5-8 mm. For example, four reinforcing plates 7 are arranged at equal intervals on the shielding edge 3.
[0046] In some embodiments, as shown in Figure 4 the corresponding reinforcing plates 7 on the two shielding edges 3 are connected by a reinforcing rod 9 to form a trapezoidal reinforcing structure. The trapezoidal reinforcing structure has an upward supporting effect on the shielding edge 3, thereby improving the support strength of the shielding edge 3. However, the reinforcing rod 9 does not contact the battery cell 2 and will not affect the sufficient contact between the lower cutting surface of the battery cell 2 and the cleaning liquid.
[0047] The process of treating the edge of the battery cell 2 is as follows:
[0048] The battery cells 2 are inserted one by one between the partition plates 6 by using a fixture, and then the quadrilateral box body is lifted and placed in the cleaning tank 5, and the bottom cutting surface of the battery cell 2 is immersed in the cleaning liquid (see the liquid level line 4 Figures 2 to 5) After waiting for a certain period of time, take out the quadrilateral box body, and the passivation treatment on the edge of the battery cell 2 can be removed.
[0049] In order to facilitate hoisting, lifting lugs 8 or hooks are provided on the two fixed end plates 1.
[0050] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0051] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. A wafer carrier device for edge processing of a solar cell, characterized in that: include: Two side baffles (10) are arranged in parallel, and partitions (6) are evenly spaced on the inner side surface of at least one of the side baffles (10), and a limiting groove for limiting the battery sheet (2) is formed between two adjacent partitions (6); shielding edges (3) bent towards each other are provided on the lower edges of the two side baffles (10), and the angle formed by the shielding edges (3) and the side baffles (10) is an obtuse angle; and Two fixed end plates (1) arranged in parallel are respectively fixed to the two ends of the two side baffles (10); the fixed end plates (1) and the side baffles (10) are connected to form a quadrilateral box body.
2. The wafer carrier device for edge processing of a solar cell according to claim 1, characterized in that: The inner sides of the two side baffles (10) are provided with corresponding partitions (6), the partitions (6) are fixed on the side baffles (10) in a fin shape, and the height h of the partitions (6) in the vertical direction is less than the height H of the battery cell (2).
3. The wafer carrier device for edge processing of a solar cell according to claim 1, characterized in that: The height h of the partition (6) is 1 / 4 to 1 / 2 of the height H of the battery cell (2).
4. The wafer carrier device for edge processing of a solar cell according to claim 1, characterized in that: First avoidance chamfers are provided on both sides of the upper edge of the partition (6).
5. The wafer carrier device for edge processing of a solar cell according to claim 4, characterized in that: The upper corner and the lower corner of the partition plate (6) away from the side baffle plate (10) are both provided with a second avoidance chamfer (61).
6. The wafer carrier device for edge processing of a solar cell according to claim 1, characterized in that: The partition plate (6) is arranged at the lower end or the middle part of the side baffle plate (10).
7. The wafer carrier device for edge processing of a solar cell according to claim 1, characterized in that: The included angle a formed by the shielding edge (3) and the side baffle (10) is 100°-120°.
8. The wafer carrier device for edge processing of a solar cell according to claim 1, characterized in that: The width M of the shielding edge (3) is 5-8 mm.
9. The wafer carrier device for edge processing of a solar cell according to claim 1, characterized in that: A reinforcing plate (7) is provided on the outer side surface of the shielding edge (3), and the reinforcing plate (7) extends upward to the outer side surface of the side baffle (10).
10. The wafer carrier device for edge processing of a solar cell according to claim 9, characterized in that: The corresponding reinforcing plates (7) on the two shielding edges (3) are connected via a reinforcing rod (9) to form a trapezoidal reinforcing structure.