A suction cup structure of a multi-piece suction cup group for photovoltaic cells

Abstract

The present application relates to the field of photovoltaic production and preparation technology, and in particular to a suction cup structure of a multi-piece suction cup group for photovoltaic cells. A suction cup structure of a multi-piece suction cup group for photovoltaic cells, comprising a suction cup body, an air suction channel formed inside the suction cup body; at least two air suction hole areas are provided on the surface of the suction cup body; the air suction hole areas are connected to the air suction channel; an air avoidance groove for guiding impurity particles is formed on the surface of the suction cup body; the air suction hole area is provided in the air avoidance groove. The suction cup structure used in the present application can effectively guide and eliminate impurity particles, thereby reducing the probability of scratches on the cell, and thus improving the quality of the photovoltaic cell.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic production and preparation technology, and in particular to a suction cup structure of a multi-piece suction cup group for photovoltaic cells. Background Art

[0002] The multi-piece suction cup assembly for photovoltaic cells is a suction cup device used in the loading and unloading equipment of solar cells and other materials in the photovoltaic solar energy production process. It is assembled from components such as suction cups, airflow plates, bases, and top gear groups. The suction cup assembly uses the suction force generated by the vacuum of the suction cup to absorb the solar cell, and at the same time, the top gear group is used to position the solar cell and transport the solar cell and other materials.

[0003] The production of solar cells in photovoltaic materials is inseparable from multi-piece suction cup groups, flower baskets and quartz boats. The applicant invented a multi-piece suction cup group to transfer the solar cell flower baskets in the flower baskets to the quartz boats. The conductive coating on the surface of the solar cells transported by the suction cups is too thin and easily scratched, which in turn affects the square resistance of the produced photovoltaic cells and their light conversion efficiency. The reasons for the scratches on the surface of the solar cells transported by the suction cups are as follows:

[0004] 1. Although the workshop environment is a dust-free workshop, there are already a small amount of impurity particles in the air. The impurity particles here will flow into the suction channel of the suction cup through the surface of the suction cup, and there will be residual impurity particles in the gap between the suction cup and the battery cell, which will cause scratches on the surface of the battery cell adsorbed and transported by the suction cup. In addition, the impurities are easy to gather at the suction port of the suction cup, causing scratches on the surface of the battery cell.

[0005] 2. During the transportation of multi-piece suction cups, the battery cells will inevitably break. During the breakage, small particles of impurities suspended in the air will appear. They are easy to be found in the process of cleaning the battery cells and break, resulting in more small particles of impurities. The presence of these impurity particles will cause scratches on the surface of the battery cells.

[0006] Although some photovoltaic processing equipment is equipped with a fresh air system, the hourly transfer capacity of the multi-piece suction cup group is 8*10 3 -1.2*10 4 According to the conventional cell breakage rate, particle impurities generated by cell breakage will still appear during the operation of the fresh air system, and the fresh air system will find it difficult to remove particles on the upward adsorption surface, and the problem of scratches on the cell surface is difficult to solve effectively. To this end, the present application provides a suction cup structure for a multi-piece suction cup group for photovoltaic cells. Summary of the invention

[0007] In order to solve the problem of scratches on the surface of the cell in the above-mentioned related art, the present application provides a suction cup structure of a multi-piece suction cup group for photovoltaic cells.

[0008] The present application provides a suction cup structure of a multi-piece suction cup group for photovoltaic cells, which is realized by the following technical solutions:

[0009] A suction cup structure of a multi-piece suction cup group for photovoltaic cells includes a suction cup body, an air suction channel is formed inside the suction cup body; at least two suction hole areas are opened on the surface of the suction cup body; the suction hole areas are connected to the suction channel; an air avoidance groove is formed on the surface of the suction cup body for guiding impurity particles; the suction hole area is opened in the air avoidance groove.

[0010] By adopting the above-mentioned technical scheme, the suction cup structure used in the present application and the designed air avoidance groove can effectively guide the impurity particles into the air avoidance groove, thereby reducing the probability of impurity particles adhering to the contact surface of the suction cup, and thus can effectively reduce the probability of scratches on the battery cell, thereby improving the quality of the transported battery cell, and thus improving the quality of the prepared photovoltaic cell.

[0011] Preferably, at least two of the air suction hole areas are respectively located at two end sides of the air avoidance groove.

[0012] By adopting the above technical solution, the probability of foreign particles adhering to the contact surface of the suction cup can be effectively reduced, thereby effectively reducing the probability of scratches on the battery cell and improving the quality of transported battery cells.

[0013] Preferably, the suction cup body includes a suction cup structure and a cover plate, the suction hole area is opened on one surface of the suction cup structure; a groove is opened on the other surface of the suction cup structure; the cover plate is sealed and fixedly connected to the groove to form an suction channel.

[0014] By adopting the above technical solution, the quality of the prepared suction cup body can be guaranteed.

[0015] Preferably, the suction cup body is made of alumina ceramic.

[0016] By adopting the above technical solution and using alumina ceramics to prepare the suction cup body, it can be ensured that the prepared suction cup body has good corrosion resistance and good surface finish after processing, is wear-resistant and has high rigidity and is not easy to deform. If deformation occurs, it is easy to break and the suction cup needs to be replaced, thereby ensuring the quality of the transported battery cells.

[0017] Preferably, the coverage diameter of the suction hole area is controlled to be 5-8 mm; the suction hole area includes a plurality of suction holes; and the suction holes are connected to the suction channel.

[0018] By adopting the above technical solution, the adsorption effect of the suction cup on the battery cell can be guaranteed, and at the same time, the foreign particles on the contact surface can be effectively removed, thereby ensuring the quality of the transported battery cell.

[0019] Preferably, the diameter specifications of the air intake holes 30 are 0.6-1mm, 1.2-1.5mm, and 3-3.6mm. The number of the air intake holes 30 with a diameter specification of 0.6-1mm is 12-18, the number of the air intake holes 30 with a diameter specification of 1.2-1.5mm is 6-8, and the number of the air intake holes 30 with a diameter specification of 3-3.6mm is 1.

[0020] By adopting the above technical solution, the suction cup can further ensure the adsorption effect of the battery cell, and at the same time, the foreign particles on the contact surface can be effectively removed, thereby ensuring the quality of the transported battery cell. In addition, it plays the role of regulating the flow and controlling the suction force of the suction cup.

[0021] Preferably, the air avoidance groove comprises an air avoidance main groove and an air avoidance branch groove, the rectangular direction of the air avoidance main groove is consistent with the rectangular direction of the suction cup body; the air avoidance branch groove is connected to the air avoidance main groove; and adjacent air avoidance branch grooves are not connected.

[0022] By adopting the above technical solution, the air-avoiding main groove and the air-avoiding branch groove effectively cover the adsorption area of ​​the suction cup, which can effectively remove the foreign particles on the contact surface, thereby ensuring the quality of the transported battery cells.

[0023] Preferably, the air avoidance groove further includes a reinforced air avoidance branch groove, and the reinforced air avoidance branch groove is connected to the air avoidance main groove and is located between adjacent air avoidance branch grooves.

[0024] By adopting the above technical solution, foreign particles on the contact surface can be further effectively removed, thereby ensuring the quality of the transported battery cells.

[0025] Preferably, the area of ​​the air-avoiding groove accounts for 15-30% of the total area of ​​the suction cup body.

[0026] By adopting the above technical solution, the present application can effectively remove foreign particles on the contact surface while ensuring the contact area between the suction cup and the battery cell, so that the pressure at the contact point between the suction cup and the battery cell is moderate and scratches are not easy to occur, thereby ensuring the quality of the transported battery cell.

[0027] Preferably, the depth of the air avoidance groove is controlled at 0.02-0.2 mm.

[0028] By controlling the depth of the air-avoiding groove, foreign particles on the contact surface can be effectively removed while reducing production costs.

[0029] In summary, this application has the following advantages:

[0030] 1. The suction cup structure used in this application can effectively guide and eliminate foreign particles, thereby reducing the probability of scratching the battery cell and improving the quality of the photovoltaic cell.

[0031] 2. The improvement scheme of the present application is relatively simple, and the increase in production cost of the improved suction cup component is small, which is easily accepted by multi-piece suction cup assembly manufacturers and photovoltaic production and manufacturing companies, thereby reducing the probability of scratches on the battery cells and improving the quality of photovoltaic cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure in Example 1 of the present application.

[0033] Figure 2 It is a schematic diagram of the overall structure in Example 2 of the present application.

[0034] Figure 3 It is a schematic diagram of the suction hole structure in the suction hole area in Example 2 of the present application.

[0035] Figure 4 It is a schematic diagram of the overall structure in Example 3 of the present application.

[0036] Figure 5 It is a schematic diagram of the overall structure in Example 4 of the present application.

[0037] Figure 6 It is a schematic diagram of the overall structure in Example 7 of the present application.

[0038] Figure 7 A multi-piece suction cup group for photovoltaic cells is assembled using the suction cups in Example 7 of the present application.

[0039] In the figure, 1. suction cup body; 11. suction cup structural member; 111. groove; 1111. first groove; 1112. second groove; 12. cover plate; 2. air suction channel; 3. air suction hole area; 30. air suction hole; 4. air avoidance groove; 41. air avoidance main groove; 42. air avoidance branch groove; 43. enhanced air avoidance branch groove. DETAILED DESCRIPTION

[0040] The present application is further described in detail below with reference to the accompanying drawings and embodiments.

[0041] Example

[0042] Example 1

[0043] Reference Figure 1 , is a suction cup structure of a multi-piece suction cup group for photovoltaic cells disclosed in the present application, including a suction cup body 1, and the suction cup body 1 is made of alumina ceramic. The suction cup body 1 is composed of a suction cup structure 11 and a cover plate 12. A groove 111 is provided on one surface of the suction cup structure 11 along the length direction of the suction cup structure 11. The cover plate 12 is sealed and fixed with epoxy resin glue, so that the cover plate 12 is sealed and fixedly connected to the groove 111, so that the suction cup body 1 is formed with a suction channel 2, and one end of the suction channel 2 is open.

[0044] Reference Figure 1 A surface of the suction cup structure 11 facing away from the cover plate 12 is machined to form an air-avoiding groove 4 for guiding impurity particles. The groove depth of the air-avoiding groove 4 is controlled to be 0.04-0.2 mm. In this embodiment, the groove depth of the air-avoiding groove 4 is controlled to be 0.05 mm. The area of ​​the air-avoiding groove 4 accounts for 15-30% of the total area of ​​the suction cup body 1. In this embodiment, the area of ​​the air-avoiding groove 4 accounts for 20±1.0% of the total area of ​​the suction cup body 1.

[0045] Reference Figure 1 The suction cup structure 11 has a surface facing away from the cover plate 12, and is provided with two suction hole areas 3 connected to the suction channel 2, and the three suction hole areas 3 are provided in the air avoidance groove 4, wherein two suction hole areas 3 are respectively located at the two ends of the air avoidance groove 4. The covering diameter of the suction hole area 3 is controlled to be 5-8 mm, and in this embodiment, the suction hole area 3 is a through hole, and the diameter is controlled to be 6 mm.

[0046] Reference Figure 1 , the air avoidance groove 4 includes a main air avoidance groove 41 and six air avoidance branch grooves 42. Among them, the rectangular direction of one main air avoidance groove 41 is consistent with the rectangular direction of the suction cup body 1, and is located in the middle of the suction cup structure 11. Three suction hole areas 3 are opened in the main air avoidance groove 41, and two of the suction hole areas 3 are respectively located at the two end sides of the main air avoidance groove 41. The center line of the three suction hole areas 3 is parallel to the rectangular direction of the main air avoidance groove 41. The spacing between adjacent suction hole areas 3 is equal. The air avoidance branch grooves 42 are formed in one piece and connected to the main air avoidance groove 41, forming an air avoidance groove 4 for guiding impurity particles. Adjacent air avoidance branch grooves 42 are spaced from each other and have equal spacing. The air avoidance branch grooves 42 are connected to the main air avoidance groove 41, but adjacent air avoidance branch grooves 42 are not directly connected. Three of the six air-avoiding branch grooves 42 are connected to the upper side of the air-avoiding main groove 41 , and the other three air-avoiding branch grooves 42 are connected to the lower side of the air-avoiding main groove 41 .

[0047] The air avoidance groove 4 designed in the suction cup structure in the present application can effectively guide foreign particles into the air avoidance groove 4, thereby reducing the probability of foreign particles adhering to the suction cup contact surface, and thus can effectively reduce the probability of scratches on the battery cell, thereby improving the quality of the transported battery cell and the quality of the prepared photovoltaic cell.

[0048] Example 2

[0049] The difference between Example 2 and Example 1 is:

[0050] Reference Figure 2 and Figure 3The air intake hole area 3 includes a plurality of air intake holes 30 connected to the air intake channel 2. The diameter specifications of the air intake holes 30 are 0.6-1mm, 1.2-1.5mm, and 3-3.6mm. The number of the air intake holes 30 with a diameter specification of 0.6-1mm is 12-18, the number of the air intake holes 30 with a diameter specification of 1.2-1.5mm is 6-8, and the number of the air intake holes 30 with a diameter specification of 3-3.6mm is 1.

[0051] In this embodiment, the number of suction holes 30 with a diameter of 0.8 mm is 12, the number of suction holes 30 with a diameter of 1.5 mm is 6, and the number of suction holes 30 with a diameter of 3.0 mm is 1, which can ensure the suction effect of the suction cup on the battery cell and effectively remove foreign particles on the contact surface, thereby ensuring the quality of the transported battery cell. In addition, it plays the role of regulating the flow rate and controlling the suction force of the suction cup.

[0052] Example 3

[0053] The difference between Example 3 and Example 1 is:

[0054] Reference Figure 4 The air avoidance groove 4 includes a main air avoidance groove 41, six air avoidance branch grooves 42, and eight reinforced air avoidance branch grooves 43. Among them, the reinforced air avoidance branch groove 43 is integrally formed and connected to the main air avoidance groove 41, and the reinforced air avoidance branch groove 43 is located between adjacent air avoidance branch grooves 42. The number of reinforced air avoidance branch grooves 43 located between adjacent air avoidance branch grooves 42 is two. Four of the eight reinforced air avoidance branch grooves 43 are connected to the upper side of the main air avoidance groove 41, and the other four reinforced air avoidance branch grooves 43 are connected to the lower side of the main air avoidance groove 41. In this embodiment, the area of ​​the air avoidance groove 4 accounts for 24±1.0% of the total area of ​​the suction cup body 1.

[0055] Example 4

[0056] The difference between Example 4 and Example 2 is:

[0057] Reference Figure 5 The air avoidance groove 4 includes a main air avoidance groove 41, six air avoidance branch grooves 42, and eight reinforced air avoidance branch grooves 43. Among them, the reinforced air avoidance branch groove 43 is integrally formed and connected to the main air avoidance groove 41, and the reinforced air avoidance branch groove 43 is located between adjacent air avoidance branch grooves 42. The number of reinforced air avoidance branch grooves 43 located between adjacent air avoidance branch grooves 42 is two. Four of the eight reinforced air avoidance branch grooves 43 are connected to the upper side of the main air avoidance groove 41, and the other four reinforced air avoidance branch grooves 43 are connected to the lower side of the main air avoidance groove 41. In this embodiment, the area of ​​the air avoidance groove 4 accounts for 24±1.0% of the total area of ​​the suction cup body 1.

[0058] Example 5

[0059] The difference between Example 5 and Example 1 is:

[0060] The area of ​​the air-avoiding groove 4 accounts for 15-16% of the total area of ​​the suction cup body 1 .

[0061] Example 6

[0062] The difference between Example 6 and Example 1 is:

[0063] The area of ​​the air-avoiding groove 4 accounts for 29-30% of the total area of ​​the suction cup body 1 .

[0064] Example 7

[0065] The difference between Example 7 and Example 1 is:

[0066] Reference Figure 6 A groove 111 is provided on one surface of the suction cup structure 11. The groove 111 includes a first groove 1111 and a second groove 1112 integrally formed with the first groove 1111. The acute angle formed by the length direction of the first groove 1111 and the length direction of the suction cup structure 11 is 9-12°, and the acute angle formed by the length direction of the second groove 1112 and the length direction of the suction cup structure 11 is 14-16°. In the present application, the acute angle formed by the length direction of the first groove 1111 and the length direction of the suction cup structure 11 is 9°, and the acute angle formed by the length direction of the second groove 1112 and the length direction of the suction cup structure 11 is 14°. The cover plate 12 is sealed and fixed with epoxy resin glue, so that the cover plate 12 is sealed and fixedly connected to the groove 111, so that the suction cup body 1 is formed with an air suction channel 2, and one end of the air suction channel 2 is open.

[0067] Reference Figure 6 A surface of the suction cup structure 11 facing away from the cover plate 12 is machined to form an air-avoiding groove 4 for guiding foreign particles. The depth of the air-avoiding groove 4 is controlled to be 0.05 mm. The area of ​​the air-avoiding groove 4 accounts for 20±1.0% of the total area of ​​the suction cup body 1.

[0068] Reference Figure 6 The suction cup structure 11 has two suction hole areas 3 connected to the suction channel 2 on one surface facing away from the cover plate 12, and the suction hole area 3 is arranged in the air avoidance groove 4. The covering diameter of the suction hole area 3 is controlled to be 6 mm. A single suction hole area 3 includes a plurality of suction holes 30 connected to the suction channel 2, and the diameters of the suction holes 30 are the same and are distributed in a dot matrix. The diameter of the suction hole 30 is controlled to be 1.0-1.2 mm.

[0069] Reference Figure 6 and Figure 7The air avoidance groove 4 includes a main air avoidance groove 41 and six air avoidance branch grooves 42. Among them, the longitudinal direction of one main air avoidance groove 41 is consistent with the longitudinal direction of the suction cup body 1, and is located in the middle of the suction cup structure 11. The air avoidance branch grooves 42 are formed in one piece and connected to the main air avoidance groove 41, forming an air avoidance groove 4 for guiding impurity particles. Adjacent air avoidance branch grooves 42 are spaced apart from each other and have equal spacing. The air avoidance branch grooves 42 are connected to the main air avoidance groove 41, but adjacent air avoidance branch grooves 42 are not directly connected. Three of the six air avoidance branch grooves 42 are connected to the upper side of the main air avoidance groove 41, and the other three air avoidance branch grooves 42 are connected to the lower side of the main air avoidance groove 41. One of the air intake hole areas 3 is located in an air avoidance branch groove 42 which is vertically connected to one end of the air avoidance main groove 41 and located below the air avoidance main groove 41, and the other air intake hole area 3 is located in an air avoidance branch groove 42 which is vertically connected to the other end of the air avoidance main groove 41 and located above the air avoidance main groove 41.

[0070] Comparative Example

[0071] Comparative Example 1:

[0072] The difference between Comparative Example 1 and Example 1 is that the air-avoiding groove 4 is not provided.

[0073] Comparative Example 2:

[0074] The difference between Comparative Example 2 and Example 1 is:

[0075] The area of ​​the air-avoiding groove 4 accounts for 8-10% of the total area of ​​the suction cup body 1 .

[0076] Comparative Example 3:

[0077] The difference between Comparative Example 3 and Example 1 is:

[0078] The area of ​​the air-avoiding groove 4 accounts for 48-50% of the total area of ​​the suction cup body 1 .

[0079] Comparative Example 4:

[0080] The difference between Comparative Example 4 and Example 1 is that the depth of the air-avoiding groove 4 is controlled at 0.02 mm.

[0081] Detection method / test method

[0082] 1. Silicon wafer scratch test: The suction cups in Examples 1-7 of the present application and the suction cups in Comparative Documents 1-4 are respectively assembled into a multi-piece suction cup group for photovoltaic cells. The assembled multi-piece suction cup group for photovoltaic cells is used to perform a cell transport test. The number of test pieces is 2,000. The number of scratched cells is detected and the records are integrated into a table.

[0083] Data analysis

[0084] Table 1 shows the scratch test parameters of silicon wafers when the suction cups in Examples 1-7 and the suction cups in Comparative Documents 1-4 are assembled into a multi-piece suction cup group for photovoltaic cells.

[0085] Number of silicon wafer scratches (pcs) Yield rate (%) Example 1 4 99.8 Example 2 2 99.9 Example 3 3 99.85 Example 4 0 100 Example 6 5 99.75 Example 6 2 99.9 Example 7 3 99.85 Comparative Example 1 398 80.1 Comparative Example 2 54 97.3 Comparative Example 3 12 99.4 Comparative Example 4 68 96.6

[0086] It can be seen from Examples 1-7 and Comparative Examples 1-4 and Table 1 that the suction cup structure used in the present application can effectively guide and eliminate foreign particles, thereby reducing the probability of scratches on the battery cell and improving the quality of the photovoltaic cell.

[0087] Combining Examples 1-7 and Comparative Examples 1-4 and Table 1, it can be seen that the quality of the photovoltaic cell transported by the multi-piece suction cup assembly assembled into the suction cups in Example 4 of the present application is the best.

[0088] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A suction cup structure of a multi-piece suction cup group for photovoltaic cells, characterized in that: The invention comprises a suction cup body (1), wherein an air suction channel (2) is formed inside the suction cup body (1); at least two air suction hole areas (3) are formed on the surface of the suction cup body (1); the air suction hole areas (3) are connected to the air suction channel (2); an air avoidance groove (4) for guiding foreign particles is formed on the surface of the suction cup body (1); the air suction hole areas (3) are arranged in the air avoidance groove (4); The coverage diameter of the air suction hole area (3) is controlled to be 5-8 mm; the air suction hole area (3) comprises a plurality of air suction holes (30); the air suction holes (30) are in communication with the air suction channel (2); The diameter specifications of the plurality of air intake holes (30) are respectively 0.6-1 mm, 1.2-1.5 mm, and 3-3.6 mm; the number of the air intake holes (30) with a diameter specification of 0.6-1 mm is 12-18, the number of the air intake holes (30) with a diameter specification of 1.2-1.5 mm is 6-8, and the number of the air intake hole (30) with a diameter specification of 3-3.6 mm is 1; The area of ​​the air avoidance groove (4) accounts for 29-30% of the total area of ​​the suction cup body (1); At least two of the air suction hole areas (3) are respectively located at two end sides of the air avoidance groove (4); The air avoidance groove (4) comprises an air avoidance main groove (41) and an air avoidance branch groove (42); the rectangular direction of the air avoidance main groove (41) is consistent with the rectangular direction of the suction cup body (1); the air avoidance branch groove (42) is connected to the air avoidance main groove (41); adjacent air avoidance branch grooves (42) are not connected.

2. The suction cup structure of a multi-piece suction cup group for photovoltaic cells according to claim 1, characterized in that: The suction cup body (1) comprises a suction cup structure (11) and a cover plate (12); the suction hole area (3) is provided on one surface of the suction cup structure (11); a groove (111) is provided on the other surface of the suction cup structure (11); and the cover plate (12) is sealed and fixedly connected to the groove (111) to form an suction channel (2).

3. The suction cup structure of a multi-piece suction cup group for photovoltaic cells according to claim 1, characterized in that: The suction cup body (1) is made of alumina ceramic.

4. The suction cup structure of a multi-piece suction cup group for photovoltaic cells according to claim 1, characterized in that: The air avoidance groove (4) further comprises a reinforced air avoidance branch groove (43), wherein the reinforced air avoidance branch groove (43) is connected to the air avoidance main groove (41) and is located between adjacent air avoidance branch grooves (42).

5. The suction cup structure of a multi-piece suction cup group for photovoltaic cells according to claim 1, characterized in that: The groove depth of the air avoidance groove (4) is controlled to be 0.04-0.2 mm.

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