Solar cell double-sided coating carrier and coating equipment

Abstract

The utility model provides a kind of solar cell double-sided coating carrier and coating equipment, including the mouth structure of being arranged in the edge of carrier, mouth structure includes: first side baffle, the first side of solar cell to be coated surface and non-coating surface intersect in first side ridge line, first side baffle is used to contact with first side ridge line, and first side baffle and first side to be coated surface and non-coating surface all have angle of inclusion;Second side baffle, the second side of solar cell to be coated surface and non-coating surface intersect in second side ridge line, second side baffle is used to contact with second side ridge line, and second side baffle and second side to be coated surface and non-coating surface all have angle of inclusion;First side baffle is connected with second side baffle to shield the non-coating surface of solar cell, the angle of inclusion between first side baffle and second side baffle can be adjusted. Both can shield non-coating surface to avoid around coating, and also can expose to be coated surface to realize full coating, improve the efficiency and yield of double-sided coating.

Description

Technical Field

[0001] This utility model relates to the field of solar cell technology, and in particular to a solar cell double-sided coating carrier and coating equipment. Background Technology

[0002] A solar cell is a device that directly converts light energy into electrical energy through the photoelectric effect or photochemical effect. As soon as it is exposed to light, it can instantly output voltage and current. In physics, this is called solar photovoltaic (PV), or simply photovoltaic. Solar cells are usually coated on one side; however, single-sided coated solar cells have low energy utilization efficiency. Double-sided coating can be used to improve the energy utilization efficiency of solar cells.

[0003] Currently, physical vapor deposition (PVD) is commonly used to coat solar cells on both sides. However, on the one hand, because the coating carrier is usually in contact with the surface to be coated, the solar cell cannot achieve full coating on both sides. On the other hand, if wrapping coating occurs on the non-coated surface of the cell during double-sided coating, it will cause the transparent conductive film on the front side of the cell to connect with the transparent conductive film on the back side, resulting in a short circuit. Utility Model Content

[0004] Therefore, it is necessary to provide a double-sided coating carrier for solar cells to address the problems mentioned above in the background technology, which can at least avoid wrap-around coating and improve the yield of double-sided coating of solar cells.

[0005] To achieve the above and other related objectives, one aspect of this application provides a double-sided coating carrier for solar cells, including a clamping structure disposed on the edge of the carrier, the clamping structure comprising:

[0006] The first side baffle is used to contact the first side edge line where the first side surface to be coated and the non-coated surface of the solar cell intersect. The first side baffle has an angle with both the first side surface to be coated and the non-coated surface.

[0007] The second side baffle is used to contact the second side edge line where the second side surface to be coated and the non-coated surface of the solar cell intersect. The second side baffle has an angle with both the second side surface to be coated and the non-coated surface.

[0008] The first side baffle is connected to the second side baffle to shield the uncoated surface of the solar cell, and the included angle between the first side baffle and the second side baffle is adjustable.

[0009] In one embodiment, the solar cell double-sided coating carrier includes at least two clamping structures arranged opposite each other, which are used to shield the two uncoated surfaces of the solar cell.

[0010] In one embodiment, the solar cell double-sided coating carrier includes four clamping structures, each used to shield one of the four non-coated surfaces of the solar cell.

[0011] In one embodiment, the included angle between two opposing first side baffles is increased to allow the solar cell to be placed into or removed from the clamping structure; and / or, the included angle between two opposing second side baffles is increased to allow the solar cell to be placed into or removed from the clamping structure.

[0012] In one embodiment, the included angle between two opposing first side baffles is reduced to fix the solar cell in the clamp structure; and / or, the included angle between two opposing second side baffles is reduced to fix the solar cell in the clamp structure.

[0013] In one embodiment, when the solar cell is placed into or removed from the clamping structure, the first side baffle does not contact the first side ridge and / or the second side baffle does not contact the second side ridge; when the solar cell is fixed in the clamping structure, the first side baffle contacts the first side ridge and the second side baffle contacts the second side ridge.

[0014] In one embodiment, the solar cell double-sided coating carrier further includes: a carrier body, with a first side baffle and a second side baffle respectively connected to the carrier body, or the first side baffle and the second side baffle being connected to the carrier body as a whole.

[0015] In one embodiment, the second side baffle is fixedly disposed relative to the vehicle body, and the angle between the second side baffle and the vehicle body is not adjustable; the first side baffle is rotatable relative to the vehicle body, and the angle between the first side baffle and the vehicle body is adjustable.

[0016] In one embodiment, the first side panel is pivotally connected to the second side panel or the vehicle body.

[0017] Another aspect of this application provides a coating apparatus, including the solar cell double-sided coating carrier described in any of the above embodiments.

[0018] According to the present invention, the double-sided coating carrier and coating equipment for solar cells include a clamping structure with baffles on both sides that only contacts the ridge line of the solar cell and not the surface of the solar cell. The clamping structure can both shield the non-coated surface of the solar cell to avoid wrapping during coating and expose the surface of the solar cell to be coated to achieve full coating, thereby improving the efficiency and yield of double-sided coating. Attached Figure Description

[0019] To better describe and illustrate embodiments and / or examples of the applications disclosed herein, reference may be made to one or more accompanying drawings. Additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed applications, the embodiments and / or examples currently described, or the best mode of conduct of these applications as currently understood.

[0020] Figure 1 This is a front view of a clamping structure provided in one embodiment;

[0021] Figure 2 This is a front view of a solar cell double-sided coating carrier provided in one embodiment;

[0022] Figure 3 This is a front view of another solar cell double-sided coating carrier provided in one embodiment;

[0023] Figure 4 This is a front view of yet another solar cell double-sided coating carrier provided in one embodiment;

[0024] Figure 5 This is a top view of a solar cell double-sided coating carrier provided in one embodiment;

[0025] Figure 6 This is a schematic diagram of the clamp structure in the open state provided in one embodiment.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100. Clamping structure; 110. First side baffle; 120. Second side baffle; 130. Carrier body; 200. Solar cell; 201. First side surface to be coated; 202. Second side surface to be coated; 203. Uncoated surface; 210. First side ridge; 220. Second side ridge. Detailed Implementation

[0028] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate preferred embodiments of the application. However, this application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0031] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this application. Although the illustrations only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation, the form, quantity and proportion of each component in the actual implementation can be arbitrarily changed, and the layout of the components may also be more complex.

[0032] When performing double-sided coating on solar cells, on the one hand, the coating carrier is usually in contact with the surface to be coated, which makes it impossible for the solar cell to be fully coated on both sides. On the other hand, if the non-coated surface of the cell is coated while double-sided coating is being performed, it will cause the transparent conductive film on the front side of the cell to connect with the transparent conductive film on the back side, resulting in a short circuit.

[0033] To address the above problems, this utility model provides a double-sided coating carrier for solar cells, as described above. Figure 1 As shown, a clamping structure 100 is provided on the edge of the vehicle, and the clamping structure 100 includes:

[0034] The first side baffle 110 is used to contact the first side ridge line 210 where the first side surface 201 to be coated and the non-coated surface 203 of the solar cell 200 intersect. The first side baffle 110 has an angle with both the first side surface 201 to be coated and the non-coated surface 203.

[0035] The second side baffle 120, the second side surface 202 to be coated and the non-coated surface 203 of the solar cell 200 intersect at the second side ridge 220, the second side baffle 120 is used to contact the second side ridge 220, and the second side baffle 120 has an angle with both the second side surface 202 to be coated and the non-coated surface 203.

[0036] The first side baffle 110 and the second side baffle 120 are connected to shield the non-coated surface 203 of the solar cell 200. The included angle between the first side baffle 110 and the second side baffle 120 is adjustable.

[0037] In one embodiment, the solar cell 200 includes, but is not limited to, at least one of a heterojunction (HJT) cell, a top-conducting contact (TOPCon) cell, an emitter and back passivation (PERC) cell, and a perovskite cell. Taking the heterojunction (HJT) cell as an example, due to its inherent structure, the HJT cell has a natural bifacial advantage, with a bifaciality as high as 95%, which is higher than that of TOPCon and PERC cells. To further enhance the bifacial advantage of the HJT cell, it can be coated on both sides, resulting in a fully transparent conductive film on both the front and back sides. Optionally, a physical vapor deposition (PVD) process can be used for coating, allowing for separate or simultaneous coating of the front and back sides of the solar cell. The materials used for the transparent conductive films formed on the front and back sides of the solar cell include, but are not limited to, indium tin oxide (ITO).

[0038] In one embodiment, when the first side surface 201 and the second side surface 202 of the solar cell 200 are the front and back sides of the solar cell 200, respectively, and the uncoated surface 203 of the solar cell is the side surface between the front and back sides, the first side surface 201 and the uncoated surface 203 intersect at the first side edge 210, which is the front edge, and the second side surface 202 and the uncoated surface 203 intersect at the second side edge 220, which is the back edge. Wherein, the side surface of the uncoated surface 203 should avoid wrap-around coating.

[0039] For example, the solar cell double-sided coating carrier also includes a carrier body 130, with a first side baffle 110 and a second side baffle 120 respectively connected to the carrier body 130, or the first side baffle 110 and the second side baffle 120 are connected to the carrier body 130 as a whole.

[0040] In one embodiment, the solar cell 200 is typically placed horizontally for double-sided coating. In this case, the second side baffle 120 serves as a back baffle, shielding the uncoated surface 203 (i.e., the side) of the solar cell and supporting it. The first side baffle 110 serves as a front baffle, shielding only the uncoated surface 203 of the solar cell. Optionally, the second side baffle 120 can be fixedly connected to the carrier body 130, such as... Figure 2 As shown, at this time, the first side baffle 110 needs to be pivotally connected to the second side baffle 120 or the vehicle body 130 to adjust the included angle of the clamping structure 100. Alternatively, the inclined surface of the vehicle body 130 can be used as the second side baffle 120, such as... Figure 3As shown, at this time, the first side baffle 110 needs to be pivotally connected to the second side baffle 120 or the carrier body 130 to adjust the included angle of the clamping structure 100. Alternatively, the included angle between the second side baffle 120 and the carrier body 130 can be adjusted, but the second side baffle 120 can be fixed relative to the carrier body 130 at the position used to support the solar cell 200, such as... Figure 4 As shown, at this time, the first side baffle 110 can be pivotally connected to the second side baffle 120 or the vehicle body 130, or it can be fixedly connected to the second side baffle 120 or the vehicle body 130.

[0041] In one embodiment, the solar cell 200 can also be placed vertically for double-sided coating. In this case, both the first side baffle 110 and the second side baffle 120 serve to both shield the uncoated surface 203 of the solar cell and support the solar cell. Optionally, the first side baffle 110 and the second side baffle 120 are pivotally connected, or at least one of the first side baffle 110 and the second side baffle 120 is pivotally connected to the carrier body 130 to adjust the included angle of the clamping structure 100. Furthermore, both the first side baffle 110 and the second side baffle 120 can be fixed relative to the carrier body 130 at the position used to support the solar cell 200.

[0042] In one embodiment, refer to Figure 1As shown, during double-sided coating of the solar cell 200, if the first surface 201 to be coated is in direct contact with the double-sided coating carrier, it will result in partial coverage of the first surface 201, preventing full coating. Therefore, the first side baffle 110 only contacts the first side ridge 210, and the first side baffle 110 forms an angle with both the first surface 201 to be coated and the non-coated surface 203, preventing the first side baffle 110 from obstructing the first surface 201 and allowing it to be fully exposed, thus achieving full coating. Similarly, if the second surface 202 to be coated is in direct contact with the double-sided coating carrier, it will result in partial coverage of the second surface 202, preventing full coating. Therefore, the second side baffle 120 only contacts the second side ridge 220, and the second side baffle 120 has an angle with both the second side surface to be coated 202 and the non-coated surface 203, avoiding the second side baffle 120 from blocking the second side surface to be coated 202, allowing the second side surface to be coated 202 to be fully exposed and achieving full coating. In order to achieve full coating of the first side surface to be coated 201 and the second side surface to be coated 202, the angle between the first side baffle 110 and the first side surface to be coated 201 and the angle between the second side baffle 120 and the second side surface to be coated 202 cannot be too small, and is usually set to be greater than 30°, such as 45°, 50°, 60°, etc. Meanwhile, the non-coated surface 203 is completely shielded by the connected first side baffle 110 and second side baffle 120, or by the connected first side baffle 110, carrier body 130 and second side baffle 120, to avoid coating around the surface.

[0043] For example, the double-sided coating carrier for solar cells includes at least two clamping structures arranged opposite each other, which are used to shield two oppositely arranged non-coated surfaces of the solar cell. Further, the double-sided coating carrier for solar cells includes four clamping structures, which are used to shield four non-coated surfaces of the solar cell.

[0044] In one embodiment, each clamping structure 100 can only support and shield one side of the solar cell 200. To support the solar cell 200 for double-sided coating, the solar cell double-sided coating carrier includes at least two opposing clamping structures 100 to support the solar cell 200. To completely shield all four sides of the solar cell, the solar cell double-sided coating carrier typically includes four clamping structures 100, as shown in the figure. Figure 5As shown, the main body 130 of the double-sided solar cell coating carrier is a frame structure. The central area of ​​the frame structure is a hollow area so that when the solar cell 200 is placed in the frame structure, the front and back sides of the solar cell 200 to be coated are exposed. The clamping structure 100 is set at the intersection of the frame structure and the hollow area. Typically, the four inner sides of the frame structure are provided with clamping structures 100 to shield the four sides of the solar cell 200 respectively and avoid coating around it.

[0045] For example, the included angle between two opposing first side baffles is increased to allow the solar cell to be placed into or removed from the clamping structure; and / or, the included angle between two opposing second side baffles is increased to allow the solar cell to be placed into or removed from the clamping structure. The included angle between the two opposing first side baffles is decreased to fix the solar cell in the clamping structure; and / or, the included angle between the two opposing second side baffles is decreased to fix the solar cell in the clamping structure.

[0046] In one embodiment, since the clamping structure 100 serves not only to shield the non-coated surface 203 of the solar cell 200 but also to support the solar cell 200, the solar cell 200 needs to be placed in the clamping structure 100 before double-sided coating. Although the solar cell 200 can be placed into the double-sided coating carrier by changing the distance between the relatively arranged clamping structures 100, disassembling and assembling the frame-type carrier body 130 is cumbersome, and additional structures are needed to support the solar cell 200 when placing it in the clamping structure 100. Therefore, the solar cell 200 can be placed in the clamping structure 100 by adjusting the angle between the first side baffle 110 and the second side baffle 120.

[0047] In one embodiment, refer to Figure 6 As shown, when the first side baffle 110 is pivotally connected to the second side baffle 120 or the carrier body 130, the first side baffle 110 can be rotated to increase the included angle between the two opposing first side baffles. For example, the two opposing first side baffles 110 can be rotated to be parallel or greater than 180°. Then, the solar cell 200 is placed on the second side baffle 120. At this time, the second side baffle 120 is in contact with the second side ridge 220, and the second side baffle 120 has an included angle with both the second side surface to be coated 202 and the non-coated surface 203. At this time, the first side baffle 110 is not in contact with any part of the solar cell 200 (e.g., the first side ridge 210). Then, the first side baffle 110 is rotated to decrease the included angle between the two opposing first side baffles until the first side baffle 110 is in contact with the first side ridge 210. At this time, the first side baffle 110 has an included angle with both the first side surface to be coated 201 and the non-coated surface 203. (Refer to...)Figure 1 As shown. This completes the process of placing the solar cell 200 into the clamping structure 100. After the solar cell 200 has completed double-sided coating, the first side baffle 110 can be rotated to increase the included angle between the two opposing first side baffles, for example, rotating the two opposing first side baffles 110 to parallel or greater than 180°. Then, the solar cell 200 is removed from the second side baffle 120 to remove the solar cell 200 from the clamping structure 100. (Refer to...) Figure 6 As shown. It should be noted that the above process is only exemplary. When the second side baffle 120 is pivotally connected to the first side baffle 110 or the carrier body 130, the solar cell can be placed into or removed from the clamping structure 100 by rotating the second side baffle 120.

[0048] Reference Figure 5 and Figure 6 As shown, the process of using a double-sided solar cell coating carrier for double-sided solar cell coating includes: The four inner sides of the frame-type carrier body 130 are each provided with a clamping structure 100. First, the first side baffle 110 of each of the four clamping structures 100 is rotated, for example, two opposing first side baffles 110 are rotated to parallel or greater than 180°, and the solar cell 200 is placed into the clamping structure 100. During this placement process, the first side baffle 110 does not contact the solar cell 200, that is, the first side baffle 110 does not contact the first side surface 201 to be coated, nor does it contact the first side edge 210. Then, in order to achieve double-sided coating of the solar cell 200, the first side baffle 110 of each of the four clamping structures 100 is rotated until the first side baffle 110 contacts the first side edge 210. During this double-sided coating process, refer to... Figure 1 As shown, the first side baffle 110 is in contact with the first side ridge 210, and the first side baffle 110 has an angle with both the first side surface to be coated 201 and the non-coated surface 203. The second side baffle 120 is in contact with the second side ridge 220, and the second side baffle 120 has an angle with both the second side surface to be coated 202 and the non-coated surface 203. At this time, the four non-coated surfaces 203 of the solar cell 200 are shielded by the clamp structure 100 formed by the connection of the first side baffle 110 and the second side baffle 120, thereby avoiding the non-coated surfaces 203 from being coated. Furthermore, due to the angle between the first side baffle 110 and the first side surface 201 to be coated, and the angle between the second side baffle 120 and the second side surface 202 to be coated, both the first side surface 201 and the second side surface 202 to be coated are fully exposed, thus achieving full coating on both surfaces. After double-sided coating is completed, refer to... Figure 6As shown, rotate the first side baffle 110 of each of the four clamping structures 100 respectively, for example, rotate the two opposite first side baffles 110 to be parallel or greater than 180°, and remove the solar cell 200 from the clamping structure 100.

[0049] This invention also provides a coating apparatus, including the double-sided coating carrier for solar cells as described above.

[0050] According to the present invention, the double-sided coating carrier and coating equipment for solar cells include a clamping structure with baffles on both sides that only contacts the ridge line of the solar cell and not the surface of the solar cell. The clamping structure can both shield the non-coated surface of the solar cell to avoid wrapping during coating and expose the surface of the solar cell to be coated to achieve full coating, thereby improving the efficiency and yield of double-sided coating.

[0051] Please note that the above embodiments are for illustrative purposes only and do not imply any limitation on this application.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0053] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A double-sided coating carrier for solar cells, characterized in that, Includes a clamping structure disposed on the edge of the vehicle, the clamping structure comprising: The first side baffle is used to contact the first side edge line where the first side surface to be coated and the non-coated surface of the solar cell intersect. The first side baffle has an angle with both the first side surface to be coated and the non-coated surface. The second side baffle is used to contact the second side edge line where the second side surface to be coated and the non-coated surface of the solar cell intersect. The second side baffle has an angle with both the second side surface to be coated and the non-coated surface. The first side baffle is connected to the second side baffle to shield the non-coated surface of the solar cell, and the included angle between the first side baffle and the second side baffle is adjustable.

2. The solar cell double-sided coating carrier according to claim 1, characterized in that, It includes at least two clamping structures arranged opposite each other, the two clamping structures being used to shield the two uncoated surfaces of the solar cell arranged opposite each other.

3. The solar cell double-sided coating carrier according to claim 2, characterized in that, It includes four clamping structures, which are used to shield the four non-coated surfaces of the solar cell.

4. The solar cell double-sided coating carrier according to claim 2 or 3, characterized in that, The included angle between the two opposing first side baffles is increased to allow the solar cell to be inserted into or removed from the clamping structure; and / or, The included angle between the two opposing second side baffles is increased so that the solar cell can be placed into or removed from the clamping structure.

5. The solar cell double-sided coating carrier according to claim 4, characterized in that, The included angle between the two opposing first side baffles is reduced to secure the solar cell in the clamp structure; and / or, The included angle between the two opposing second side baffles is reduced so that the solar cell is fixed in the clamp structure.

6. The solar cell double-sided coating carrier according to claim 5, characterized in that, When the solar cell is placed into or removed from the clamping structure, the first side baffle does not contact the first side edge and / or the second side baffle does not contact the second side edge; When the solar cell is fixed in the clamp structure, the first side baffle is in contact with the first side edge and the second side baffle is in contact with the second side edge.

7. The solar cell double-sided coating carrier according to claim 1, characterized in that, Also includes: The vehicle body is provided with the first side panel and the second side panel respectively connected to the vehicle body, or the first side panel and the second side panel are connected to the vehicle body as a whole.

8. The solar cell double-sided coating carrier according to claim 7, characterized in that, The second side baffle is fixedly disposed relative to the vehicle body, and the angle between the second side baffle and the vehicle body is not adjustable; the first side baffle is rotatable relative to the vehicle body, and the angle between the first side baffle and the vehicle body is adjustable.

9. The solar cell double-sided coating carrier according to claim 8, characterized in that, The first side baffle is pivotally connected to the second side baffle or the main body of the vehicle.

10. A coating apparatus, characterized in that, The solar cell double-sided coating carrier includes any one of claims 1 to 9.

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