Conveying device, sintering furnace and photovoltaic cell production line

Abstract

The embodiment of the utility model provides a conveying device, a sintering furnace and a photovoltaic cell production line, and belongs to the technical field of photovoltaic cell production equipment. The conveying device comprises two opposite conveying assemblies, wherein each conveying assembly comprises a conveying belt; the multiple supporting rods are distributed on the conveying belt, and the first ends of the supporting rods are fixedly connected with the conveying belt; the first supporting seat is fixed to the second end of the supporting rod, the first supporting seat is provided with an inclined face, and the inclined face extends from the top end of the first supporting seat to the tail end deviating from the first supporting seat. In the embodiment of the invention, when the battery piece is conveyed, the battery piece is supported on the two opposite inclined surfaces and moves along with the movement of the inclined surfaces, the contact between the battery piece and the inclined surfaces is linear contact, and the contact position between the inclined surfaces and the battery piece is the edge of the battery piece, so that the sintering area of the battery piece can be increased as much as possible; and local overheating cannot be generated, the sintering effect of the battery piece can be improved, and the product quality of the solar battery is further improved.

Description

Technical Field

[0001] This application relates to the field of photovoltaic cell production equipment technology, and in particular to a conveying device, a sintering furnace, and a photovoltaic cell production line. Background Technology

[0002] Sintering is a step in the production process of solar cells. After the solar cells are screen-printed, they need to be dried and sintered at high temperatures.

[0003] In sintering furnaces, existing conveying devices include various types, but all have some drawbacks. For example, the contact between the conveying device and the solar cell is a fixed point contact, which can cause local overheating of the solar cell and affect its quality. Another example is that the contact between the conveying device and the solar cell is a local surface contact, which can obstruct the solar cell and affect the sintering effect. Utility Model Content

[0004] This application provides a conveying device, a sintering furnace, and a photovoltaic cell production line to solve or alleviate one or more of the technical problems mentioned above.

[0005] As a first aspect of the present application, a conveying device is provided, applied in a sintering furnace, comprising two conveying components arranged opposite to each other, the conveying components including:

[0006] Conveyor belts, two conveyor components, move in the same direction;

[0007] Multiple support rods are distributed on the conveyor belt, and the first end of each support rod is fixedly connected to the conveyor belt.

[0008] The first support is fixed to the second end of the support rod, which is opposite to the first end. The first support has an inclined surface that extends from the top of the first support toward the end opposite to the first support.

[0009] In one embodiment, the distance between two adjacent first supports is greater than zero and less than 1 / 2 of the cell size.

[0010] In one embodiment, there is one first support base, and the first support base is fixedly connected to multiple support rods.

[0011] In one embodiment, the support rod and the first support base are integrally formed.

[0012] In one embodiment, the slope of the inclined plane is 1 / 2 to 2.

[0013] As a second aspect of this application, a conveying device is provided, applied in a sintering furnace, comprising two conveying components arranged opposite to each other, the conveying components including:

[0014] support frame

[0015] Multiple rollers are arranged sequentially on a support frame, and the drive end of the rollers is fixedly connected to the support frame.

[0016] The second support is fixed to the output end of the roller shaft. The second support includes a top end and an end opposite to the roller shaft. The battery cells are placed on the top end or the arc surface between the top end and the end end.

[0017] In one embodiment, the second support is an ellipsoidal support or a cone-shaped support.

[0018] In one embodiment, the second support and the roller are integrally formed.

[0019] As a third aspect of the embodiments of this application, a sintering furnace is provided, comprising:

[0020] The furnace body has an inner cavity formed for sintering the solar cells.

[0021] The conveying device in any of the above embodiments is used to drive the battery cells through the furnace cavity.

[0022] As a fourth aspect of the present application, a photovoltaic cell production line is provided, including a sintering furnace in any of the above embodiments.

[0023] In this embodiment, the solar cell is supported on two opposing inclined planes during transport and moves with the inclined planes. The contact between the solar cell and the inclined plane is a line contact, and the contact point between the inclined plane and the solar cell is the edge of the solar cell. This maximizes the sintering area of ​​the solar cell and prevents local overheating, thereby improving the sintering effect of the solar cell and thus improving the product quality of the solar cell. Attached Figure Description

[0024] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0025] Figure 1 This is a top view of a conveying device provided in one embodiment of the present application.

[0026] Figure 2 This is a front view structural schematic diagram of a transmission device provided in an embodiment of this application.

[0027] Figure 3 This is a schematic diagram of the left-side structure of a transmission device provided in an embodiment of this application.

[0028] Figure 4 This is a top view of a conveying device provided in another embodiment of this application.

[0029] Figure 5 This is a front view structural schematic diagram of a transmission device provided in another embodiment of this application.

[0030] Figure 6 This is a schematic diagram of the left-side structure of a transmission device provided in another embodiment of this application. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The application will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] In this application, when numerical intervals (i.e., numerical ranges) are involved, unless otherwise specified, the distribution of selectable numerical values ​​within the numerical interval is considered continuous, and includes the two endpoints of the numerical interval (i.e., the minimum and maximum values), as well as every numerical value between these two endpoints. Unless otherwise specified, when a numerical interval refers only to integers within that numerical interval, it includes the two endpoint integers of the numerical range, as well as every integer between the two endpoints, which is equivalent to directly listing every integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be merged. In other words, unless otherwise specified, the numerical ranges disclosed in this application should be understood to include any and all subranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, percentage, ratio, etc. The term "numerical interval" can be broadly included to include percentage intervals, ratio intervals, proportion intervals, etc.

[0034] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. It should be understood that these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein.

[0035] This application provides a conveying device applied in a sintering furnace to convey solar cells within the furnace cavity, allowing the solar cells to enter and exit the furnace cavity, thus completing the sintering process.

[0036] Figure 1 This is a top view of a conveying device provided in one embodiment of the present application. Figure 2 This is a front view structural schematic diagram of a transmission device provided in an embodiment of this application. Figure 3 This diagram shows a left-side view of a transmission device according to an embodiment of this application. Figures 1 to 3 As shown, the conveying device includes two conveying components arranged opposite each other. The two conveying components support both sides of the solar cell 100 and move to allow the central region of the solar cell 100 to be sintered. The two conveying components have the same structure and are symmetrically arranged. Each conveying component includes a conveyor belt 210, multiple support rods 220, and a first support base 230.

[0037] The conveyor belt 210 is a conveyor belt 210 that can realize the transmission function. The conveyor belts 210 of the two transmission components drive in the same direction. The conveyor belt 210 can be a gear conveyor belt 210, or it can be a structure with transmission function that is currently used or may be used in the art in the future.

[0038] Multiple support rods 220 are distributed on the conveyor belt 210, and the first end of the support rod 220 is fixedly connected to the conveyor belt 210; the support rod 220 is moved during the transmission of the conveyor belt 210. The method of fixed connection is not limited.

[0039] The conveyor belt 210 can be installed on the outside of the furnace cavity, and the support rod 220 passes through the side wall of the furnace cavity and is fixedly connected to the first support seat 230.

[0040] The first support 230 is fixed to the second end of the support rod 220, which is opposite to the first end and close to the opposite conveying assembly, so that the battery cell 100 can be mounted on the first support 230 on the two conveying assemblies. The conveyor belt 210 drives the support rod 220, which in turn drives the first support 230 to move, thus the two first support 230s support the movement of the battery cell 100. The first support 230 has an inclined surface that extends from the top of the first support 230 toward the end opposite to the first support 230. It can be understood that the inclined surface can have a certain length in any direction. Therefore, by setting the inclined surface, the contact between the battery cell 100 and the first support 230 is at least a line contact, which is less likely to cause local overheating.

[0041] In one example, the length of the ramp along the conveying direction can be greater than 1 / 4 of the dimension of the battery cell 100 along the conveying direction to ensure that the battery cell 100 makes line contact with the first support 230.

[0042] In this embodiment, when the solar cell 100 is being transported, it is supported on two opposing inclined surfaces and moves with the movement of the inclined surfaces. The contact between the solar cell 100 and the inclined surfaces is a line contact, and the contact position between the inclined surfaces and the solar cell 100 is at the edge of the solar cell 100. This maximizes the sintering area of ​​the solar cell 100 without causing local overheating, thereby improving the sintering effect of the solar cell 100 and thus improving the product quality of the solar cell.

[0043] In one embodiment, the distance between two adjacent first support seats 230 is greater than zero and less than half the size of the battery cell 100. Multiple first support seats 230 are distributed on the conveyor belt 210 to support multiple battery cells 100. The battery cells 100 can be placed between two adjacent first support seats 230. If the distance between two adjacent first support seats 230 is too large, the battery cells 100 may become unstable and fall through the gap when placed; furthermore, the contact line between the battery cell 100 and the first support seat 230 may be too short, resulting in localized overheating.

[0044] In this embodiment of the application, the distance between two adjacent first support bases 230 is greater than 0 and less than 1 / 2 of the size of the battery cell 100, so as to ensure that the battery cell 100 is not prone to local overheating during the sintering process.

[0045] In one embodiment, there is one first support base 230, and one first support base 230 is fixedly connected to a plurality of support rods 220.

[0046] In this embodiment, the structures of the multiple first support seats 230 in the above embodiments are connected into a whole. When the conveyor belt 210 is driven, the first support seat 230 moves forward as a whole, and the supported battery cell 100 also moves forward. The battery cell 100 and the integrated first support seat 230 are still in line contact. Therefore, this structure is also within the protection scope of this embodiment.

[0047] The first support 230 is an integrated structure, which also facilitates production and installation and improves the efficiency of assembling the conveyor device.

[0048] The term "one first support 230" refers to the fact that there is one first support 230 in one transmission component. The two transmission components each have two first support 230s, which support the battery cells 100 on opposite sides respectively.

[0049] In one embodiment, the support rod 220 and the first support base 230 are integrally formed, making the connection between the support rod 220 and the first support base 230 more stable and less prone to breakage. The positions of the multiple first support bases 230 can be better kept flush, thereby providing more stable support for the battery cell 100 and improving the sintering effect of the battery cell 100.

[0050] After the support rod 220 and the first support base 230 are integrally formed, they are then fixed onto the conveyor belt 210 to obtain the conveyor assembly.

[0051] In one embodiment, the slope of the inclined plane is 1 / 2 to 2. The slope of the inclined plane cannot be too small, that is, the inclined plane cannot be too close to the horizontal direction; otherwise, the solar cell 100 would need to be mounted very close to the end of the first support 230 to retain more sintering area, and the solar cell 100 would easily fall into the sintering furnace cavity. The slope of the inclined plane also cannot be too large; if it is too large, the supporting force of the first support 230 on the solar cell 100 will be close to upward, which is insufficient to act on the middle of the solar cell 100 to stabilize the solar cell 100.

[0052] In this application embodiment, the slope of the inclined plane is limited to 1 / 2 to 2, for example, it can be 1 / 2 (the inclination angle of the inclined plane relative to the horizontal direction is 30°), 1 (the inclination angle of the inclined plane relative to the horizontal direction is 45°) or 1 / 2 (the inclination angle of the inclined plane relative to the horizontal direction is 60°).

[0053] This application embodiment also provides a conveying device, which is applied in a sintering furnace to convey the battery cell 100 to move within the furnace cavity of the sintering furnace, so that the battery cell 100 enters the furnace cavity and moves out of the furnace cavity to complete sintering.

[0054] Figure 4 This is a top view of a conveying device provided in another embodiment of this application. Figure 5 This is a front view structural schematic diagram of a transmission device provided in another embodiment of this application. Figure 6 This diagram shows a left-side view of a transmission device according to another embodiment of this application. Figures 4 to 6 As shown, the conveying device includes two conveying components arranged opposite each other. The two conveying components support and move on both sides of the solar cell 100 so that the central region of the solar cell 100 can be sintered. The two conveying components have the same structure and are arranged symmetrically. The conveying components include a support frame 310, multiple rollers 320, and a second support base 330.

[0055] Multiple rollers 320 are arranged sequentially on the support frame 310, and the drive end 321 of the rollers 320 is fixedly connected to the support frame 310.

[0056] In one example, the support frame 310 can be mounted on the outside of the furnace cavity, and the roller 320 passes through the side wall of the furnace cavity and is fixedly connected to the second support base 330. Meanwhile, the drive end 321 of the roller 320 can also be located on the outside of the furnace cavity. The drive end 321 is equipped with a drive device for driving the roller 320 to roll.

[0057] The second support 330 is fixed to the output end of the roller 320. When the roller 320 rolls, it drives the second support 330 to roll. The second support 330 includes a top end and an end away from the roller 320. The battery cell 100 is placed on the top end or the arc surface between the top end and the end end.

[0058] The solar cell 100 is mounted on two opposing second support seats 330. When the opposing second support seats 330 roll, the solar cell 100 mounted on the second support seats 330 can move forward due to friction. The second support seat 330 includes a top end, that is, the highest point of the second support seat 330, and also includes an end end away from the roller shaft 320, that is, the height of the end end is lower than the height of the top end. Since the second support seat 330 is to rotate, in order to stably support the solar cell 100, the surface in contact with the solar cell 100 needs to remain unchanged during the rotation process to ensure the stable conveying of the solar cell 100. Therefore, the transition surface from the top end to the end end is an arc surface. When the solar cell 100 is mounted on the arc surface, the contact between the solar cell 100 and the arc surface is a point contact. However, due to the continuous rotation of the second support seat 330 and the movement of the solar cell 100 relative to the second support seat 330, the part of the second support seat 330 and the solar cell 100 that interacts with each other also forms a line. The composure allows the solar cell 100 to avoid localized overheating during the sintering process.

[0059] In one embodiment, the second support 330 is an ellipsoidal spherical support or a cone-shaped support. For example... Figure 4The elliptical second support 330 shown in the figure drives the battery 100 forward as it rolls.

[0060] The contact point between the battery cell 100 and the second support 330 can be a point on the curved surface or the top.

[0061] In one embodiment, the second support 330 and the roller 320 are integrally formed.

[0062] Similarly, the integrally formed second support 330 and roller 320 can make the connection between the second support 330 and roller 320 more stable and less prone to breakage. The positions of multiple second support 330s can be better kept flush, thereby supporting the battery cell 100 more stably and improving the sintering effect of the battery cell 100.

[0063] Other configurations of the transmission device in the above embodiments can be adopted from various technical solutions now and in the future known to those skilled in the art, and will not be described in detail here.

[0064] This application also provides a sintering furnace, including a furnace body and a conveying device in any of the above embodiments.

[0065] The inner side of the furnace body forms a furnace cavity for sintering solar cells; the conveying device is used to drive the solar cells in the furnace cavity to realize the solar cells entering the furnace cavity for sintering, and after sintering is completed, the solar cells are removed.

[0066] Other configurations of the sintering furnace in the above embodiments can be derived from various technical solutions now and in the future known to those skilled in the art, and will not be described in detail here.

[0067] This application also provides a photovoltaic cell production line, including a sintering furnace according to any of the above embodiments. The photovoltaic cell production line may further include other devices for producing photovoltaic cells, such as a cleaning device, a texturing device, a screen printing device, etc. After screen printing, the cells are conveyed to a conveying device of the sintering furnace, specifically to the cell input end of the conveying device, so that the conveying device carries the cells into the furnace chamber of the sintering furnace, and after sintering, they are output from the cell output end.

[0068] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0069] For ease of description, directional terms such as "front, back, up, down, left, right," "horizontal, vertical, horizontal," and "top, bottom" generally indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the components themselves. For example, if a device in the drawings is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0070] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0071] Unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0072] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0073] It should also be noted that the terms "one embodiment," "another embodiment," or "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this application.

[0074] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0075] It should also be noted that the above are merely preferred embodiments of this application and do not limit the scope of patent protection of this application. Any equivalent structural or procedural changes made using the content of this application’s specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A conveying device used in a sintering furnace, characterized in that, The transmission components include two transmission components positioned opposite each other, the transmission components comprising: The conveyor belts of the two conveyor assemblies move in the same direction; Multiple support rods are distributed on the conveyor belt, and the first end of each support rod is fixedly connected to the conveyor belt. A first support base is fixed to the second end of the support rod, the second end being the end opposite to the first end. The first support base has an inclined surface extending from the top of the first support base toward the end opposite to the first support base.

2. The conveying device according to claim 1, characterized in that, The distance between two adjacent first support bases is greater than zero and less than 1 / 2 of the size of the battery cell.

3. The conveying device according to claim 1, characterized in that, There is one first support base, and one first support base is fixedly connected to multiple support rods.

4. The conveying device according to any one of claims 1 to 3, characterized in that, The support rod and the first support base are integrally formed.

5. The conveying device according to any one of claims 1 to 3, characterized in that, The slope of the inclined plane is 1 / 2 to 2.

6. A conveying device used in a sintering furnace, characterized in that, The transmission components include two transmission components positioned opposite each other, the transmission components comprising: support frame Multiple rollers are arranged sequentially on the support frame, and the drive end of each roller is fixedly connected to the support frame. The second support is fixed to the output end of the roller shaft. The second support includes a top end and an end opposite to the roller shaft. The battery cell is placed on the top end or the arc surface between the top end and the end end.

7. The conveying device according to claim 6, characterized in that, The second support is an ellipsoidal support or a cone-shaped support.

8. The conveying device according to claim 6 or 7, characterized in that, The second support base and the roller are integrally formed.

9. A sintering furnace, characterized in that, include: A furnace body, the inner side of which forms a furnace cavity for sintering battery cells; The conveying device according to any one of claims 1 to 8 is used to drive the battery cells through the furnace cavity.

10. A photovoltaic cell production line, characterized in that, Includes the sintering furnace as described in claim 9.

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