Flower basket installation

Abstract

The present invention relates to a basket device for carrying a plurality of solar cells in a process with a size of 210 mm or more, which comprises two support walls and a plurality of support rods. The two ends of each support rod are respectively connected to the two support walls, and each support rod is perpendicular to the support wall. The plurality of support rods are divided into three groups, and the axes of all support rods in each group are located in the same virtual plane, and the three virtual planes corresponding to the three groups can enclose a rectangular accommodating space with one side opening together with the two support walls, and each support rod is provided with a plurality of tooth structures protruding toward the accommodating space, and the tooth spacing of each tooth structure is 6.3±0.02mm. According to the present invention, by improving the tooth spacing of the basket device, it is avoided that adjacent large-sized solar cells are overlapped or collided due to gravity, liquid fluctuations, elastic deformation, etc. in various processes.

Description

Technical Field

[0001] The invention relates to the field of energy, and in particular to a basket device for carrying a plurality of solar cell sheets in a manufacturing process. Background Art

[0002] With the accelerated consumption of conventional fossil energy such as coal, oil and natural gas, the ecological environment is deteriorating, especially the increasingly severe global climate change caused by greenhouse gas emissions, and the sustainable development of human society has been seriously threatened. Countries around the world have formulated their own energy development strategies to cope with the limited resources of conventional fossil energy and the environmental problems caused by its development and utilization. Solar energy has become one of the most important renewable energy sources due to its reliability, safety, extensiveness, longevity, environmental protection and sufficient resources, and is expected to become the main pillar of global electricity supply in the future.

[0003] In the new round of energy transformation, my country's photovoltaic industry has grown into a strategic emerging industry with international competitive advantages. However, the development of the photovoltaic industry still faces many problems and challenges. Conversion efficiency and reliability are the biggest technical obstacles to the development of the photovoltaic industry, while cost control and scale have formed economic constraints.

[0004] The production process of solar cells is divided into the following general steps: silicon wafer cutting and preparation, removal of damaged layer, surface texturing and pickling, diffusion bonding, removal of phosphorus silicon glass, plasma etching and pickling, anti-reflection film coating, screen printing, rapid sintering, etc. In the above steps, the silicon wafer needs to be processed. For example, surface texturing is to use the anisotropic corrosion of silicon to form millions of four-sided square cones, that is, pyramid structures, on each square centimeter of silicon surface. Before preparing the velvet, the silicon wafer must first undergo preliminary surface corrosion, using alkaline or acidic corrosion liquid to remove about 20 to 25 μm. After the velvet surface is corroded, chemical cleaning is performed. In addition, the step of removing phosphorus silicon glass is performed by chemical etching, that is, soaking the silicon wafer in a hydrofluoric acid solution to produce a chemical reaction to generate a soluble complex hexafluorosilicic acid to remove a layer of phosphorus silicon glass formed on the surface of the silicon wafer after diffusion bonding. In the above steps of placing the silicon wafer in a strong alkali for texturing or placing the silicon wafer in an acidic solution for cleaning, the basket device that carries multiple solar cells in the process is very important.

[0005] Especially in the actual production process of solar cells, rod and slot flower baskets are widely used. In the texturing process, they play an important role in holding the original silicon wafers and entering the slot body for texturing. In the texturing process, the silicon wafers are brought into each process slot for processing through the rod and slot flower basket. However, due to the lack of constraints, the current flower baskets cause the silicon wafers to jump in a large range during the process due to the driving of the liquid, which is easy to cause missing corners, large edge collapse and even fragments; due to the lack of constraints, large-sized silicon wafers are prone to stacking, resulting in uneven surface texturing; due to the lack of constraints, the silicon wafers are tightly attached to the flower basket teeth due to the influence of gravity and liquid pressure during the process, and are not completely dried after cleaning, resulting in the appearance of flower basket prints.

[0006] In addition, when the silicon wafers flow to the diffusion, etching, and annealing process stages in the manufacturing process, the rod-groove basket also causes certain damage to the silicon wafers. For example, when loading and unloading, due to the operator's laxity or the rapid movement of the equipment, the silicon wafers produce stress concentration on the rods; when loading, due to the sagging of the silicon wafers, the silicon wafers do not contact the belt at the scheduled time, and enter the transmission in advance, causing loading blockage and belt marks. At the same time, as the size of the silicon wafers increases, and the original spacing between the basket rods is also large, it is easy for workers to touch the silicon wafers when loading and unloading, increasing the probability of fingerprints.

[0007] Furthermore, the existing flower basket is particularly unsuitable for large-sized silicon wafers. The existing flower basket cannot meet the normal elastic deformation of the silicon wafer under the influence of external force due to the small spacing between the teeth, resulting in the formation of stacking of some silicon wafers when entering the liquid process. When the stacking is processed in the liquid, the surface process of the silicon wafer will be uneven, affecting the effect of the battery cell; and when the silicon wafer is taken out of the liquid, the surface liquid will flow down, causing the two adjacent silicon wafers to stick together and carry the liquid out of the tank. A large number of stackings appear in this process section, which will pollute the liquid when it is carried to another tank process, causing mixed liquid and affecting the concentration of the solution. In the latter stage, the stacking carries the liquid into the furnace, and the surface of the silicon wafer is burnt after high temperature, resulting in the formation of fragments.

[0008] Therefore, it is necessary to provide a flower basket device to at least partially solve the above problems. Summary of the invention

[0009] The object of the present invention is to provide a basket device for carrying a plurality of solar cells in a process with a size of more than 210 mm. By improving the tooth spacing of the basket device, the basket is prevented from being stacked together due to gravity before entering the tank body; since the spacing between the solar cells is relatively wide, when the basket device enters the cleaning tank, the liquid and the fluctuation of the liquid aroused when the solar cells enter the liquid will not affect the adjacent solar cells; when the basket device is taken out of the liquid, it will not collide with each other when it is elastically deformed (bulged) by the influence of the falling liquid; the spacing between the two teeth of the basket device is sufficient, and under the condition of the allowable deformation of the solar cells, the two solar cells will not carry liquid due to partial overlap, causing defects.

[0010] The present invention can also preferably provide an adjustable basket device, and some support rods are set to be adjustable to ensure that each support rod can fully contact and support the solar cell in practical applications.

[0011] According to one aspect of the present invention, there is provided a basket device for carrying a plurality of solar cells in a process with a size of 210 mm or more, the basket device comprising:

[0012] two supporting walls, the two supporting walls being parallel to and facing each other;

[0013] A plurality of support rods, each of which has two ends connected to the two support walls, and each of which is perpendicular to the support walls. The plurality of support rods are divided into three groups, and the axes of all the support rods in each group are located in the same virtual plane. The three virtual planes corresponding to the three groups can enclose a rectangular accommodating space with an opening on one side together with the two support walls, and each of the support rods is provided with a plurality of tooth structures protruding toward the accommodating space.

[0014] Wherein, a plurality of the solar cells can enter the accommodating space through the openings respectively and be supported by the supporting rods, and the solar cells are separated from each other by the tooth structures.

[0015] In one embodiment, among the three groups of support rods, the virtual plane corresponding to the first group is the first plane, the virtual plane corresponding to the second group is the second plane, and the virtual plane corresponding to the third group is the third plane, wherein the first plane and the second plane are parallel and both perpendicular to the third plane, and the first group of support rods and the second group of support rods are aligned one by one in a direction parallel to the third plane.

[0016] In one embodiment, the basket device is oriented so that the second plane is above the first plane and the opening faces sideways.

[0017] In one embodiment, for each group of support rods, the distance between any two adjacent support rods is the same.

[0018] In one embodiment, for each group of support rods, the distance between the two support rods that are farthest apart is 125 mm-135 mm.

[0019] In one embodiment, the length of the support rod is 540 mm-700 mm.

[0020] In one embodiment, for any one of the support rods, the distance between the two pool structures that are farthest apart is 476 mm-630 mm.

[0021] In one embodiment, the distance between the first plane and the second plane is 156 mm-220 mm.

[0022] In one embodiment, the maximum dimension of the support wall in a direction perpendicular to the first plane is 265 mm-275 mm;

[0023] The maximum dimension of the support wall in a direction perpendicular to the third plane is 265 mm-275 mm;

[0024] The wall thickness of the support wall is 14mm-18mm;

[0025] The distance between the surfaces of the two supporting walls facing away from each other is 550 mm-710 mm.

[0026] In one embodiment, a recess is provided on the edge of the support wall for engaging other devices used in conjunction with the flower basket device.

[0027] In one embodiment, the flower basket device further includes a retaining rod detachably connected between the two supporting walls, the retaining rod being positioned at the opening for blocking the solar cell at the opening after the solar cell enters the accommodating space, and when the solar cell is carried in the flower basket device, there is a spacing between the solar cell and the retaining rod.

[0028] In one embodiment, the flower basket device is an adjustable flower basket device, wherein each group of the support rods is at least three, and each group of the support rods is further divided into fixed support rods and adjustable support rods, and for each group of the support rods, the fixed support rods are two and are fixed relative to the support wall, and the adjustable support rods are adjustable relative to the support wall so that the adjustable support rods can be manually or automatically adjusted to a state coplanar with the fixed support rods.

[0029] According to the present invention, by improving the tooth spacing of the flower basket device, the flower basket is prevented from overlapping due to gravity before entering the tank body; because the spacing between the solar cells is wide, when the flower basket device enters the cleaning tank, the liquid and the fluctuation of the liquid stirred up when the solar cells enter the liquid will not affect the adjacent solar cells; when the flower basket device is taken out of the liquid, it will not collide with each other when it is elastically deformed (protruded) by the falling liquid; the spacing between the two teeth of the flower basket device is sufficient, and under the deformation allowed by the solar cells, the two solar cells will not carry liquid due to partial overlap, causing defects. In addition, the present invention can also preferably provide an adjustable flower basket device, and set some support rods to be adjustable to ensure that each support rod can fully contact and support the solar cells in actual applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to better understand the above and other purposes, features, advantages and functions of the present invention, reference may be made to the preferred embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings refer to the same components. It should be understood by those skilled in the art that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present invention and have no limiting effect on the scope of the present invention, and the components in the drawings are not drawn to scale.

[0031] Figure 1 It is a front view of a flower basket device according to a preferred embodiment of the present invention;

[0032] Figure 2 for Figure 1 Left side view of the flower basket device shown. DETAILED DESCRIPTION

[0033] Now, with reference to the accompanying drawings, the specific embodiments of the present invention are described in detail. What is described here is only the preferred embodiment of the present invention, and those skilled in the art can think of other ways to implement the present invention based on the preferred embodiment, and the other ways also fall within the scope of the present invention.

[0034] The present invention provides a basket device for carrying a plurality of solar cells in a manufacturing process, and the basket device is suitable for carrying solar cells in a manufacturing process of various sizes, and is particularly suitable for solar cells with a size greater than 220 mm. It should be noted that the "solar cells in a manufacturing process" mentioned herein include the raw materials of solar cells (such as silicon wafers), semi-finished solar cells in various manufacturing processes and between various manufacturing processes, and finished solar cells just after manufacturing.

[0035] Figure 1 to Figure 2FIG. 1 shows a preferred embodiment of the present invention. In conjunction with the accompanying drawings, it can be seen that the flower basket device includes two support walls 1 and a plurality of support rods 2. It should be noted that the "first direction" mentioned herein refers to the extension direction of each support rod 2. Figure 2 The "second direction" refers to the height direction of the basket device when it has the orientation shown in the accompanying drawings, Figure 1 and Figure 2 In the figure, D2 is shown; “third direction” refers to a direction perpendicular to both the first direction D1 and the second direction D2. Figure 2 "First plane" and "second plane" refer to the planes defined by the first direction D1 and the third direction D3 when the basket device has the orientation shown in the drawings, which are respectively Figure 2 The third plane refers to the plane defined by the first direction D1 and the second direction D2 when the basket device has the orientation shown in the drawings, which is Figure 2 P3 is shown in FIG.

[0036] refer to Figure 1 and Figure 2 The two support walls 1 are parallel to each other and face each other, and the support rods 2 are also parallel to each other. The two ends of each support rod 2 are respectively connected to the two support walls 1 and the support rods 2 are perpendicular to the support walls 1. The support rods 2 are divided into three groups, and the axes of all the support rods 2 in each group are located in the same virtual plane.

[0037] For example, Figure 2 As shown, the axes of the first group of support rods 21 are located in the same virtual plane, which is called the first plane P1; the axes of the second group of support rods 22 are located in the same virtual plane, which is called the second plane P2; the axes of the third group of support rods 23 are located in the same virtual plane, which is called the third plane P3. The first plane P1, the second plane P2, the third plane P3 and the two support walls 1 together form a rectangular accommodating space with an opening on one side, and the solar cell can enter the accommodating space through the opening. In addition, each support rod 2 is provided with a plurality of tooth structures protruding toward the accommodating space, and each solar cell located in the accommodating space is separated from each other by each tooth structure. The tooth spacing of each tooth structure is 6.3±0.02mm, so as to ensure that adjacent solar cells will not overlap when carrying large-size solar cells.

[0038] Combination Figure 2 It can be seen that the first plane P1 is parallel to the second plane P2 and perpendicular to the third plane P3. Figure 2As shown in the orientation, the second plane P2 is located above the first plane P1. For the accommodation space mentioned above, the second group of support rods 22 defines the top surface of the accommodation space, the first group of support rods 21 defines the bottom surface of the accommodation space, the third group of support rods 23 and the two support walls 1 respectively define the three sides of the accommodation space, and the opening of the accommodation space is also facing the side. Preferably, the distance between the first plane P1 and the second plane P2 (the distance is Figure 1 2 ) satisfies: 156 mm ≤ X7 ≤ 220 mm, for example, X7 = 210 mm. Preferably, the first group of support rods 21 and the second group of support rods 22 are aligned one by one in a direction parallel to the third plane P3 (for example, the second direction D2 shown in FIG. 2 ).

[0039] It can be understood that when the solar cell in the process is placed in the storage space of the basket device, the first group of support rods 21 can apply support force to the lower edge of the solar cell; the second group of support rods 22 can apply support force to the upper edge of the solar cell; the third group of support rods 23 can provide support force to the side edge of the solar cell. Since each group of support rods 2 has three, the solar cell can have three force points on each side edge, so that the force can be evenly applied, local stress concentration can be avoided, and jumping can be avoided.

[0040] Preferably, part of the support rods 2 can be configured to be adjustable, so that the flower basket device is further formed into an adjustable flower basket device. Specifically, each group of support rods 2 is divided into fixed support rods and adjustable support rods, the fixed support rods are two and fixed relative to the support wall 1, and the adjustable support rods can be adjusted relative to the support wall 1 so that they can be manually or automatically adjusted to a state coplanar with the fixed support rods. The adjustable support rods can have an adjustable range of 20 threads (100 threads = 1 mm), for example.

[0041] by Figure 2 Taking the first group of support rods 21 in the example, the left support rod 211 and the right support rod 213 can be fixed support rods, and the middle support rod 212 can be an adjustable support rod. After the solar cell enters the accommodation space, the left support rod 211 and the right support rod 213 first provide two-point upward support force for the bottom edge of the solar cell, and then manually or automatically adjust the middle support rod 212 to make it fully contact the bottom edge of the solar cell, so that each of the first group of support rods 21 provides sufficient support for the solar cell.

[0042] Such an arrangement can ensure that each support rod of each group can be accurately located in the same plane, thereby avoiding the situation where some support rods fail to actually contact the solar cell panels.

[0043] Each group of support rods 2 can have some preferred settings that are common in this embodiment. Each group of support rods 2 is evenly arranged in the plane defined by it. For example, for each group of support rods 2, the distance between any two adjacent support rods 2 is the same, and the distance X3 between the two support rods 2 that are farthest apart satisfies: 125mm≤X3≤135mm, for example, X3=130mm; the length of each support rod 2 can be 540mm-700mm, and on each support rod 2, the distance between any two adjacent tooth structures is equal, and the distance X5 between the two tooth structures that are farthest apart satisfies: 476mm≤X5≤630mm, for example, X5=630mm.

[0044] There are also various preferred options for the parameters of the two support walls 1. For example, Figure 2 , the maximum dimension X2 of the support wall 1 in the direction perpendicular to the first plane P1 (this dimension can be understood as the height of the flower basket device) satisfies: 265mm≤X2≤275mm, for example, X2=270mm; the maximum dimension X1 of the support wall 1 in the direction perpendicular to the third plane P3 (this dimension can be understood as the width of the flower basket device) satisfies: 265mm≤X1≤275mm, for example, X3=270mm; Reference Figure 1 , the thickness X4 of the support wall 1 satisfies: 14mm ≤ X4 ≤ 18mm, for example, X4 = 16mm; the distance X6 between the surfaces of the two support walls 1 that are away from each other (this distance value can be understood as the length of the basket device) satisfies: 550mm ≤ X6 ≤ 710mm, for example, X6 = 710mm. Also preferably, the edge of the support wall 1 is provided with a plurality of recessed portions 3 for engaging other devices used in conjunction with the basket device, for example, for engaging a transmission device, etc.

[0045] More preferably, reference Figure 2 The flower basket device further includes a holding rod 4 detachably connected between the two support walls 1, and the holding rod 4 does not contact the solar cell and is only used to prevent the solar cell from sliding out of the opening. Preferably, the support wall 1 can be provided with a corresponding recess 3 for carrying the holding rod 4. In use, the holding rod 4 can be first removed from between the two support walls 1, and then the solar cell is placed into the accommodation space through the opening, and then the holding rod 4 is reinstalled between the two support walls 1.

[0046] Of course, it can be understood that although the present embodiment provides the preferred parameter settings of the support wall 1 and the support wall 1, in practice the size settings of the support rod 2 and the support wall 1 should be considered as a whole, and the size settings of the support rod 2 and the support wall 1 should be designed as a whole so that the support rod 2 and the support wall 1 can fit accurately.

[0047] According to the present invention, a group of support rods of the flower basket device located in a plane are all more than three, so that when carrying the solar cell panels, uniform support force and sufficient restraint can be provided to the solar cell panels, thereby avoiding a series of problems caused by insufficient support and restraint to the solar cell panels.

[0048] Specifically, the flower basket device of the present invention can, on the one hand, enable each support rod to provide uniform supporting force to the solar cell when carrying the solar cell, so that the solar cell has more stress points, thereby avoiding local stress concentration, reducing fatigue damage of the solar cell, clamping the deformation of the solar cell, controlling the sagging range of the solar cell, and avoiding the solar cell entering the belt transmission prematurely.

[0049] On the other hand, the basket device of the present invention increases the constraints on the solar cell. This reduces the broken edges and corners caused by the jumping of the solar cell when the robot lifts the basket device from the liquid. And because the present invention increases the number of support rods, the spacing between the support rods becomes smaller, ensuring that the two bottom corners of the solar cell will not hit the periphery when the solar cell moves slightly. The above description of various embodiments of the present invention is provided to a person of ordinary skill in the relevant field for descriptive purposes. It is not intended to exclude or limit the present invention to a single disclosed embodiment. As described above, a person of ordinary skill in the field of the above teachings will understand the various alternatives and variations of the present invention. Therefore, although some alternative embodiments are specifically described, a person of ordinary skill in the art will understand or relatively easily develop other embodiments. The present invention is intended to include all alternatives, modifications and variations of the present invention described herein, as well as other embodiments that fall within the spirit and scope of the present invention described above.

[0050] Description of reference numerals:

[0051] Support wall 1

[0052] Support rod 2

[0053] The first set of support rods 21

[0054] The second set of support rods 22

[0055] The third group of support rods 23

[0056] Left support rod 211

[0057] Middle support rod 212

[0058] Right support rod 213

[0059] Depression 3

[0060] Retaining rod 4

[0061] Solar cell 5

[0062] First plane P1

[0063] The second plane P2

[0064] The third plane P3

[0065] First direction D1

[0066] Second direction D2

[0067] Third direction D3.

Claims

1. A basket device for carrying a plurality of solar cells in a process with a size of 210 mm or more, characterized in that: The flower basket device comprises: two support walls (1), the two support walls are parallel to each other and face each other; a plurality of support rods (2), the two ends of each support rod are respectively connected to the two support walls, and each support rod is perpendicular to the support walls, the plurality of support rods are divided into three groups, the axes of all the support rods in each group are located in the same virtual plane, and the three virtual planes corresponding to the three groups can enclose a rectangular accommodating space with an opening on one side together with the two support walls, and each support rod is provided with a plurality of tooth structures protruding toward the accommodating space, and the tooth spacing of each tooth structure is 6.3±0.02mm, wherein the plurality of solar cells can respectively enter the accommodating space through the opening and be supported by the support rods, and the respective solar cells are separated from each other by the tooth structures; The flower basket device is an adjustable flower basket device, wherein each group of support rods is at least three, and each group of support rods is divided into fixed support rods and adjustable support rods, and for each group of support rods, the fixed support rods are two and fixed relative to the support wall, and the adjustable support rods are adjustable relative to the support wall so that they can be manually or automatically adjusted to a state coplanar with the fixed support rods; wherein, The adjustable support rod is configured to be adjusted to contact the edge of the solar cell sheet after the solar cell sheet is supported by the fixed support rod; For each group of support rods, the distance between any two adjacent support rods is the same; the length of the support rods is 540mm-700mm.

2. The flower basket device according to claim 1, characterized in that: Among the three groups of support rods, the virtual plane corresponding to the first group of support rods (21) is the first plane (P1), the virtual plane corresponding to the second group of support rods (22) is the second plane (P2), and the virtual plane corresponding to the third group of support rods (23) is the third plane (P3), wherein the first plane and the second plane are parallel and both perpendicular to the third plane, and the first group of support rods and the second group of support rods are aligned one by one in a direction parallel to the third plane.

3. The flower basket device according to claim 2, characterized in that: The flower basket device is oriented so that the second plane is located above the first plane and the opening is facing sideways.

4. The flower basket device according to claim 1, characterized in that: For each group of support rods, the distance (X3) between the two support rods that are farthest apart is 125mm-135mm.

5. The flower basket device according to claim 1, characterized in that: For any one of the support rods, the distance (X5) between the two tooth structures that are farthest apart is 476mm-630mm.

6. The flower basket device according to claim 2, characterized in that: The distance (X7) between the first plane and the second plane is 156mm-220mm.

7. The flower basket device according to claim 2, characterized in that: The maximum dimension (X2) of the support wall in a direction perpendicular to the first plane is 265mm-275mm; the maximum dimension (X1) of the support wall in a direction perpendicular to the third plane is 265mm-275mm; the wall thickness (X4) of the support wall is 14mm-18mm; the distance (X6) between the surfaces of the two support walls facing away from each other is 550mm-710mm.

8. The flower basket device according to claim 1, characterized in that: The edge of the supporting wall is provided with a recessed portion for engaging with other devices used in conjunction with the flower basket device.

9. The flower basket device according to claim 1, characterized in that: The flower basket device also includes a retaining rod (4) detachably connected between the two supporting walls, the retaining rod being positioned at the opening to block the solar cell at the opening after the solar cell enters the accommodating space, and a spacing exists between the solar cell and the retaining rod when the solar cell is carried in the flower basket device.

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